* [PATCH v8 1/6] ARM: tegra: export apb dma readl/writel
2014-06-12 15:36 ` Peter De Schrijver
(?)
@ 2014-06-12 15:36 ` Peter De Schrijver
-1 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Russell King, Stephen Warren, Thierry Reding, Andrew Morton,
Linus Walleij, Wolfram Sang,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
Export APB DMA readl and writel. These are needed because we can't access
the fuses directly on Tegra20 without potentially causing a system hang.
Also have the APB DMA readl and writel return an error in case of a read
failure instead of just returning zero or ignore write failures.
Signed-off-by: Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
arch/arm/mach-tegra/apbio.c | 51 ++++++++++++++++++++++++++----------------
include/linux/tegra-soc.h | 14 +++++++++++
2 files changed, 45 insertions(+), 20 deletions(-)
diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c
index bc47197..e0bf49d 100644
--- a/arch/arm/mach-tegra/apbio.c
+++ b/arch/arm/mach-tegra/apbio.c
@@ -32,8 +32,8 @@ static u32 *tegra_apb_bb;
static dma_addr_t tegra_apb_bb_phys;
static DECLARE_COMPLETION(tegra_apb_wait);
-static u32 tegra_apb_readl_direct(unsigned long offset);
-static void tegra_apb_writel_direct(u32 value, unsigned long offset);
+static int tegra_apb_readl_direct(unsigned long offset, u32 *value);
+static int tegra_apb_writel_direct(u32 value, unsigned long offset);
static struct dma_chan *tegra_apb_dma_chan;
static struct dma_slave_config dma_sconfig;
@@ -128,58 +128,64 @@ static int do_dma_transfer(unsigned long apb_add,
return 0;
}
-static u32 tegra_apb_readl_using_dma(unsigned long offset)
+int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
{
int ret;
if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_readl_direct(offset);
+ return tegra_apb_readl_direct(offset, value);
mutex_lock(&tegra_apb_dma_lock);
ret = do_dma_transfer(offset, DMA_DEV_TO_MEM);
- if (ret < 0) {
+ if (ret < 0)
pr_err("error in reading offset 0x%08lx using dma\n", offset);
- *(u32 *)tegra_apb_bb = 0;
- }
+ else
+ *value = *tegra_apb_bb;
+
mutex_unlock(&tegra_apb_dma_lock);
- return *((u32 *)tegra_apb_bb);
+
+ return ret;
}
-static void tegra_apb_writel_using_dma(u32 value, unsigned long offset)
+int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
{
int ret;
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init()) {
- tegra_apb_writel_direct(value, offset);
- return;
- }
+ if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
+ return tegra_apb_writel_direct(value, offset);
mutex_lock(&tegra_apb_dma_lock);
*((u32 *)tegra_apb_bb) = value;
ret = do_dma_transfer(offset, DMA_MEM_TO_DEV);
+ mutex_unlock(&tegra_apb_dma_lock);
if (ret < 0)
pr_err("error in writing offset 0x%08lx using dma\n", offset);
- mutex_unlock(&tegra_apb_dma_lock);
+
+ return ret;
}
#else
#define tegra_apb_readl_using_dma tegra_apb_readl_direct
#define tegra_apb_writel_using_dma tegra_apb_writel_direct
#endif
-typedef u32 (*apbio_read_fptr)(unsigned long offset);
-typedef void (*apbio_write_fptr)(u32 value, unsigned long offset);
+typedef int (*apbio_read_fptr)(unsigned long offset, u32 *value);
+typedef int (*apbio_write_fptr)(u32 value, unsigned long offset);
static apbio_read_fptr apbio_read;
static apbio_write_fptr apbio_write;
-static u32 tegra_apb_readl_direct(unsigned long offset)
+static int tegra_apb_readl_direct(unsigned long offset, u32 *value)
{
- return readl(IO_ADDRESS(offset));
+ *value = readl(IO_ADDRESS(offset));
+
+ return 0;
}
-static void tegra_apb_writel_direct(u32 value, unsigned long offset)
+static int tegra_apb_writel_direct(u32 value, unsigned long offset)
{
writel(value, IO_ADDRESS(offset));
+
+ return 0;
}
void tegra_apb_io_init(void)
@@ -197,7 +203,12 @@ void tegra_apb_io_init(void)
u32 tegra_apb_readl(unsigned long offset)
{
- return apbio_read(offset);
+ u32 val;
+
+ if (apbio_read(offset, &val) < 0)
+ return 0;
+ else
+ return val;
}
void tegra_apb_writel(u32 value, unsigned long offset)
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 95f611d..b02d73b 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -19,4 +19,18 @@
u32 tegra_read_chipid(void);
+
+#if defined(CONFIG_TEGRA20_APB_DMA)
+int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
+int tegra_apb_writel_using_dma(u32 value, unsigned long offset);
+#else
+static inline int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
+{
+ return -EINVAL;
+}
+static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
+{
+ return -EINVAL;
+}
+#endif
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 1/6] ARM: tegra: export apb dma readl/writel
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: linux-arm-kernel
Export APB DMA readl and writel. These are needed because we can't access
the fuses directly on Tegra20 without potentially causing a system hang.
Also have the APB DMA readl and writel return an error in case of a read
failure instead of just returning zero or ignore write failures.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
arch/arm/mach-tegra/apbio.c | 51 ++++++++++++++++++++++++++----------------
include/linux/tegra-soc.h | 14 +++++++++++
2 files changed, 45 insertions(+), 20 deletions(-)
diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c
index bc47197..e0bf49d 100644
--- a/arch/arm/mach-tegra/apbio.c
+++ b/arch/arm/mach-tegra/apbio.c
@@ -32,8 +32,8 @@ static u32 *tegra_apb_bb;
static dma_addr_t tegra_apb_bb_phys;
static DECLARE_COMPLETION(tegra_apb_wait);
-static u32 tegra_apb_readl_direct(unsigned long offset);
-static void tegra_apb_writel_direct(u32 value, unsigned long offset);
+static int tegra_apb_readl_direct(unsigned long offset, u32 *value);
+static int tegra_apb_writel_direct(u32 value, unsigned long offset);
static struct dma_chan *tegra_apb_dma_chan;
static struct dma_slave_config dma_sconfig;
@@ -128,58 +128,64 @@ static int do_dma_transfer(unsigned long apb_add,
return 0;
}
-static u32 tegra_apb_readl_using_dma(unsigned long offset)
+int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
{
int ret;
if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_readl_direct(offset);
+ return tegra_apb_readl_direct(offset, value);
mutex_lock(&tegra_apb_dma_lock);
ret = do_dma_transfer(offset, DMA_DEV_TO_MEM);
- if (ret < 0) {
+ if (ret < 0)
pr_err("error in reading offset 0x%08lx using dma\n", offset);
- *(u32 *)tegra_apb_bb = 0;
- }
+ else
+ *value = *tegra_apb_bb;
+
mutex_unlock(&tegra_apb_dma_lock);
- return *((u32 *)tegra_apb_bb);
+
+ return ret;
}
-static void tegra_apb_writel_using_dma(u32 value, unsigned long offset)
+int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
{
int ret;
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init()) {
- tegra_apb_writel_direct(value, offset);
- return;
- }
+ if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
+ return tegra_apb_writel_direct(value, offset);
mutex_lock(&tegra_apb_dma_lock);
*((u32 *)tegra_apb_bb) = value;
ret = do_dma_transfer(offset, DMA_MEM_TO_DEV);
+ mutex_unlock(&tegra_apb_dma_lock);
if (ret < 0)
pr_err("error in writing offset 0x%08lx using dma\n", offset);
- mutex_unlock(&tegra_apb_dma_lock);
+
+ return ret;
}
#else
#define tegra_apb_readl_using_dma tegra_apb_readl_direct
#define tegra_apb_writel_using_dma tegra_apb_writel_direct
#endif
-typedef u32 (*apbio_read_fptr)(unsigned long offset);
-typedef void (*apbio_write_fptr)(u32 value, unsigned long offset);
+typedef int (*apbio_read_fptr)(unsigned long offset, u32 *value);
+typedef int (*apbio_write_fptr)(u32 value, unsigned long offset);
static apbio_read_fptr apbio_read;
static apbio_write_fptr apbio_write;
-static u32 tegra_apb_readl_direct(unsigned long offset)
+static int tegra_apb_readl_direct(unsigned long offset, u32 *value)
{
- return readl(IO_ADDRESS(offset));
+ *value = readl(IO_ADDRESS(offset));
+
+ return 0;
}
-static void tegra_apb_writel_direct(u32 value, unsigned long offset)
+static int tegra_apb_writel_direct(u32 value, unsigned long offset)
{
writel(value, IO_ADDRESS(offset));
+
+ return 0;
}
void tegra_apb_io_init(void)
@@ -197,7 +203,12 @@ void tegra_apb_io_init(void)
u32 tegra_apb_readl(unsigned long offset)
{
- return apbio_read(offset);
+ u32 val;
+
+ if (apbio_read(offset, &val) < 0)
+ return 0;
+ else
+ return val;
}
void tegra_apb_writel(u32 value, unsigned long offset)
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 95f611d..b02d73b 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -19,4 +19,18 @@
u32 tegra_read_chipid(void);
+
+#if defined(CONFIG_TEGRA20_APB_DMA)
+int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
+int tegra_apb_writel_using_dma(u32 value, unsigned long offset);
+#else
+static inline int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
+{
+ return -EINVAL;
+}
+static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
+{
+ return -EINVAL;
+}
+#endif
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 1/6] ARM: tegra: export apb dma readl/writel
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Russell King, Stephen Warren, Thierry Reding, Andrew Morton,
Linus Walleij, Wolfram Sang, linux-arm-kernel, linux-tegra,
linux-kernel
Export APB DMA readl and writel. These are needed because we can't access
the fuses directly on Tegra20 without potentially causing a system hang.
Also have the APB DMA readl and writel return an error in case of a read
failure instead of just returning zero or ignore write failures.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
arch/arm/mach-tegra/apbio.c | 51 ++++++++++++++++++++++++++----------------
include/linux/tegra-soc.h | 14 +++++++++++
2 files changed, 45 insertions(+), 20 deletions(-)
diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c
index bc47197..e0bf49d 100644
--- a/arch/arm/mach-tegra/apbio.c
+++ b/arch/arm/mach-tegra/apbio.c
@@ -32,8 +32,8 @@ static u32 *tegra_apb_bb;
static dma_addr_t tegra_apb_bb_phys;
static DECLARE_COMPLETION(tegra_apb_wait);
-static u32 tegra_apb_readl_direct(unsigned long offset);
-static void tegra_apb_writel_direct(u32 value, unsigned long offset);
+static int tegra_apb_readl_direct(unsigned long offset, u32 *value);
+static int tegra_apb_writel_direct(u32 value, unsigned long offset);
static struct dma_chan *tegra_apb_dma_chan;
static struct dma_slave_config dma_sconfig;
@@ -128,58 +128,64 @@ static int do_dma_transfer(unsigned long apb_add,
return 0;
}
-static u32 tegra_apb_readl_using_dma(unsigned long offset)
+int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
{
int ret;
if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_readl_direct(offset);
+ return tegra_apb_readl_direct(offset, value);
mutex_lock(&tegra_apb_dma_lock);
ret = do_dma_transfer(offset, DMA_DEV_TO_MEM);
- if (ret < 0) {
+ if (ret < 0)
pr_err("error in reading offset 0x%08lx using dma\n", offset);
- *(u32 *)tegra_apb_bb = 0;
- }
+ else
+ *value = *tegra_apb_bb;
+
mutex_unlock(&tegra_apb_dma_lock);
- return *((u32 *)tegra_apb_bb);
+
+ return ret;
}
-static void tegra_apb_writel_using_dma(u32 value, unsigned long offset)
+int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
{
int ret;
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init()) {
- tegra_apb_writel_direct(value, offset);
- return;
- }
+ if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
+ return tegra_apb_writel_direct(value, offset);
mutex_lock(&tegra_apb_dma_lock);
*((u32 *)tegra_apb_bb) = value;
ret = do_dma_transfer(offset, DMA_MEM_TO_DEV);
+ mutex_unlock(&tegra_apb_dma_lock);
if (ret < 0)
pr_err("error in writing offset 0x%08lx using dma\n", offset);
- mutex_unlock(&tegra_apb_dma_lock);
+
+ return ret;
}
#else
#define tegra_apb_readl_using_dma tegra_apb_readl_direct
#define tegra_apb_writel_using_dma tegra_apb_writel_direct
#endif
-typedef u32 (*apbio_read_fptr)(unsigned long offset);
-typedef void (*apbio_write_fptr)(u32 value, unsigned long offset);
+typedef int (*apbio_read_fptr)(unsigned long offset, u32 *value);
+typedef int (*apbio_write_fptr)(u32 value, unsigned long offset);
static apbio_read_fptr apbio_read;
static apbio_write_fptr apbio_write;
-static u32 tegra_apb_readl_direct(unsigned long offset)
+static int tegra_apb_readl_direct(unsigned long offset, u32 *value)
{
- return readl(IO_ADDRESS(offset));
+ *value = readl(IO_ADDRESS(offset));
+
+ return 0;
}
-static void tegra_apb_writel_direct(u32 value, unsigned long offset)
+static int tegra_apb_writel_direct(u32 value, unsigned long offset)
{
writel(value, IO_ADDRESS(offset));
+
+ return 0;
}
void tegra_apb_io_init(void)
@@ -197,7 +203,12 @@ void tegra_apb_io_init(void)
u32 tegra_apb_readl(unsigned long offset)
{
- return apbio_read(offset);
+ u32 val;
+
+ if (apbio_read(offset, &val) < 0)
+ return 0;
+ else
+ return val;
}
void tegra_apb_writel(u32 value, unsigned long offset)
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 95f611d..b02d73b 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -19,4 +19,18 @@
u32 tegra_read_chipid(void);
+
+#if defined(CONFIG_TEGRA20_APB_DMA)
+int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
+int tegra_apb_writel_using_dma(u32 value, unsigned long offset);
+#else
+static inline int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
+{
+ return -EINVAL;
+}
+static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
+{
+ return -EINVAL;
+}
+#endif
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v8 2/6] ARM: tegra: move fuse exports to tegra-soc.h
2014-06-12 15:36 ` Peter De Schrijver
(?)
@ 2014-06-12 15:36 ` Peter De Schrijver
-1 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Russell King, Stephen Warren, Thierry Reding, Joseph Lo,
Paul Gortmaker, Stefan Agner, Tejun Heo, Olof Johansson,
Bjorn Helgaas, Alexandre Courbot, Tomasz Figa,
Sebastian Hesselbarth, Tuomas Tynkkynen,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
All fuse related functionality will move to a driver in the following patches.
To prepare for this, export all the required functionality in a global header
file and move all users of fuse.h to tegra-soc.h. While we're at it, remove
tegra_bct_strapping, as its only user was removed in Commit a7cbe92cef27
("ARM: tegra: remove tegra EMC scaling driver").
Signed-off-by: Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
arch/arm/mach-tegra/cpuidle.c | 2 +-
arch/arm/mach-tegra/flowctrl.c | 2 +-
arch/arm/mach-tegra/fuse.h | 18 ------------------
arch/arm/mach-tegra/hotplug.c | 2 +-
arch/arm/mach-tegra/platsmp.c | 2 +-
arch/arm/mach-tegra/pm.c | 2 +-
arch/arm/mach-tegra/pmc.c | 2 +-
arch/arm/mach-tegra/powergate.c | 2 +-
arch/arm/mach-tegra/reset-handler.S | 2 +-
arch/arm/mach-tegra/reset.c | 2 +-
arch/arm/mach-tegra/sleep-tegra30.S | 2 +-
arch/arm/mach-tegra/tegra.c | 2 +-
arch/arm/mach-tegra/tegra114_speedo.c | 1 +
arch/arm/mach-tegra/tegra20_speedo.c | 1 +
arch/arm/mach-tegra/tegra30_speedo.c | 1 +
include/linux/tegra-soc.h | 24 ++++++++++++++++++++++++
16 files changed, 38 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c
index 7bc5d8d..ff0a10b 100644
--- a/arch/arm/mach-tegra/cpuidle.c
+++ b/arch/arm/mach-tegra/cpuidle.c
@@ -23,8 +23,8 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/tegra-soc.h>
-#include "fuse.h"
#include "cpuidle.h"
void __init tegra_cpuidle_init(void)
diff --git a/arch/arm/mach-tegra/flowctrl.c b/arch/arm/mach-tegra/flowctrl.c
index ce8ab8a..4b31091 100644
--- a/arch/arm/mach-tegra/flowctrl.c
+++ b/arch/arm/mach-tegra/flowctrl.c
@@ -22,10 +22,10 @@
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/cpumask.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
#include "iomap.h"
-#include "fuse.h"
static u8 flowctrl_offset_halt_cpu[] = {
FLOW_CTRL_HALT_CPU0_EVENTS,
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
index c01d047..b17c4ba 100644
--- a/arch/arm/mach-tegra/fuse.h
+++ b/arch/arm/mach-tegra/fuse.h
@@ -26,21 +26,7 @@
#define SKU_ID_AP25E 27
#define SKU_ID_T25E 28
-#define TEGRA20 0x20
-#define TEGRA30 0x30
-#define TEGRA114 0x35
-#define TEGRA124 0x40
-
#ifndef __ASSEMBLY__
-enum tegra_revision {
- TEGRA_REVISION_UNKNOWN = 0,
- TEGRA_REVISION_A01,
- TEGRA_REVISION_A02,
- TEGRA_REVISION_A03,
- TEGRA_REVISION_A03p,
- TEGRA_REVISION_A04,
- TEGRA_REVISION_MAX,
-};
extern int tegra_sku_id;
extern int tegra_cpu_process_id;
@@ -48,12 +34,8 @@ extern int tegra_core_process_id;
extern int tegra_chip_id;
extern int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
extern int tegra_soc_speedo_id;
-extern enum tegra_revision tegra_revision;
-
-extern int tegra_bct_strapping;
unsigned long long tegra_chip_uid(void);
-void tegra_init_fuse(void);
bool tegra_spare_fuse(int bit);
u32 tegra_fuse_readl(unsigned long offset);
diff --git a/arch/arm/mach-tegra/hotplug.c b/arch/arm/mach-tegra/hotplug.c
index ff26af2..38c5170 100644
--- a/arch/arm/mach-tegra/hotplug.c
+++ b/arch/arm/mach-tegra/hotplug.c
@@ -10,10 +10,10 @@
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/smp_plat.h>
-#include "fuse.h"
#include "sleep.h"
static void (*tegra_hotplug_shutdown)(void);
diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
index 929d104..d9878ac 100644
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@@ -19,13 +19,13 @@
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/cacheflush.h>
#include <asm/mach-types.h>
#include <asm/smp_scu.h>
#include <asm/smp_plat.h>
-#include "fuse.h"
#include "flowctrl.h"
#include "reset.h"
#include "pmc.h"
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index f55b05a..d7e6370 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -26,6 +26,7 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/smp_plat.h>
#include <asm/cacheflush.h>
@@ -37,7 +38,6 @@
#include "iomap.h"
#include "reset.h"
#include "flowctrl.h"
-#include "fuse.h"
#include "pm.h"
#include "pmc.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c
index fb79202..d8fe587 100644
--- a/arch/arm/mach-tegra/pmc.c
+++ b/arch/arm/mach-tegra/pmc.c
@@ -21,9 +21,9 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/tegra-powergate.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
-#include "fuse.h"
#include "pm.h"
#include "pmc.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c
index 4cefc5c..50a9af4 100644
--- a/arch/arm/mach-tegra/powergate.c
+++ b/arch/arm/mach-tegra/powergate.c
@@ -30,8 +30,8 @@
#include <linux/spinlock.h>
#include <linux/clk/tegra.h>
#include <linux/tegra-powergate.h>
+#include <linux/tegra-soc.h>
-#include "fuse.h"
#include "iomap.h"
#define DPD_SAMPLE 0x020
diff --git a/arch/arm/mach-tegra/reset-handler.S b/arch/arm/mach-tegra/reset-handler.S
index 8c1ba4f..0c480d69 100644
--- a/arch/arm/mach-tegra/reset-handler.S
+++ b/arch/arm/mach-tegra/reset-handler.S
@@ -20,9 +20,9 @@
#include <asm/cache.h>
#include <asm/asm-offsets.h>
#include <asm/hardware/cache-l2x0.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
-#include "fuse.h"
#include "iomap.h"
#include "reset.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c
index 146fe8e..203bac5 100644
--- a/arch/arm/mach-tegra/reset.c
+++ b/arch/arm/mach-tegra/reset.c
@@ -22,12 +22,12 @@
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/firmware.h>
+#include <linux/tegra-soc.h>
#include "iomap.h"
#include "irammap.h"
#include "reset.h"
#include "sleep.h"
-#include "fuse.h"
#define TEGRA_IRAM_RESET_BASE (TEGRA_IRAM_BASE + \
TEGRA_IRAM_RESET_HANDLER_OFFSET)
diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S
index b16d4a57..f808c2c 100644
--- a/arch/arm/mach-tegra/sleep-tegra30.S
+++ b/arch/arm/mach-tegra/sleep-tegra30.S
@@ -15,13 +15,13 @@
*/
#include <linux/linkage.h>
+#include <linux/tegra-soc.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/cache.h>
#include "irammap.h"
-#include "fuse.h"
#include "sleep.h"
#include "flowctrl.h"
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 6191603..e48b271 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -34,6 +34,7 @@
#include <linux/usb/tegra_usb_phy.h>
#include <linux/clk/tegra.h>
#include <linux/irqchip.h>
+#include <linux/tegra-soc.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach-types.h>
@@ -46,7 +47,6 @@
#include "board.h"
#include "common.h"
#include "cpuidle.h"
-#include "fuse.h"
#include "iomap.h"
#include "irq.h"
#include "pmc.h"
diff --git a/arch/arm/mach-tegra/tegra114_speedo.c b/arch/arm/mach-tegra/tegra114_speedo.c
index 5218d48..7c73716 100644
--- a/arch/arm/mach-tegra/tegra114_speedo.c
+++ b/arch/arm/mach-tegra/tegra114_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/arch/arm/mach-tegra/tegra20_speedo.c b/arch/arm/mach-tegra/tegra20_speedo.c
index fa6eb57..3b1bb53 100644
--- a/arch/arm/mach-tegra/tegra20_speedo.c
+++ b/arch/arm/mach-tegra/tegra20_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/arch/arm/mach-tegra/tegra30_speedo.c b/arch/arm/mach-tegra/tegra30_speedo.c
index 125cb16..81a958d 100644
--- a/arch/arm/mach-tegra/tegra30_speedo.c
+++ b/arch/arm/mach-tegra/tegra30_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index b02d73b..db93b77 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -17,8 +17,29 @@
#ifndef __LINUX_TEGRA_SOC_H_
#define __LINUX_TEGRA_SOC_H_
+#define TEGRA20 0x20
+#define TEGRA30 0x30
+#define TEGRA114 0x35
+#define TEGRA124 0x40
+
+#ifndef __ASSEMBLY__
+
+enum tegra_revision {
+ TEGRA_REVISION_UNKNOWN = 0,
+ TEGRA_REVISION_A01,
+ TEGRA_REVISION_A02,
+ TEGRA_REVISION_A03,
+ TEGRA_REVISION_A03p,
+ TEGRA_REVISION_A04,
+ TEGRA_REVISION_MAX,
+};
+
+u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
+void tegra_init_fuse(void);
+extern int tegra_chip_id;
+extern enum tegra_revision tegra_revision;
#if defined(CONFIG_TEGRA20_APB_DMA)
int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
@@ -33,4 +54,7 @@ static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
return -EINVAL;
}
#endif
+
+#endif /* __ASSEMBLY__ */
+
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 2/6] ARM: tegra: move fuse exports to tegra-soc.h
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: linux-arm-kernel
All fuse related functionality will move to a driver in the following patches.
To prepare for this, export all the required functionality in a global header
file and move all users of fuse.h to tegra-soc.h. While we're at it, remove
tegra_bct_strapping, as its only user was removed in Commit a7cbe92cef27
("ARM: tegra: remove tegra EMC scaling driver").
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
arch/arm/mach-tegra/cpuidle.c | 2 +-
arch/arm/mach-tegra/flowctrl.c | 2 +-
arch/arm/mach-tegra/fuse.h | 18 ------------------
arch/arm/mach-tegra/hotplug.c | 2 +-
arch/arm/mach-tegra/platsmp.c | 2 +-
arch/arm/mach-tegra/pm.c | 2 +-
arch/arm/mach-tegra/pmc.c | 2 +-
arch/arm/mach-tegra/powergate.c | 2 +-
arch/arm/mach-tegra/reset-handler.S | 2 +-
arch/arm/mach-tegra/reset.c | 2 +-
arch/arm/mach-tegra/sleep-tegra30.S | 2 +-
arch/arm/mach-tegra/tegra.c | 2 +-
arch/arm/mach-tegra/tegra114_speedo.c | 1 +
arch/arm/mach-tegra/tegra20_speedo.c | 1 +
arch/arm/mach-tegra/tegra30_speedo.c | 1 +
include/linux/tegra-soc.h | 24 ++++++++++++++++++++++++
16 files changed, 38 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c
index 7bc5d8d..ff0a10b 100644
--- a/arch/arm/mach-tegra/cpuidle.c
+++ b/arch/arm/mach-tegra/cpuidle.c
@@ -23,8 +23,8 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/tegra-soc.h>
-#include "fuse.h"
#include "cpuidle.h"
void __init tegra_cpuidle_init(void)
diff --git a/arch/arm/mach-tegra/flowctrl.c b/arch/arm/mach-tegra/flowctrl.c
index ce8ab8a..4b31091 100644
--- a/arch/arm/mach-tegra/flowctrl.c
+++ b/arch/arm/mach-tegra/flowctrl.c
@@ -22,10 +22,10 @@
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/cpumask.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
#include "iomap.h"
-#include "fuse.h"
static u8 flowctrl_offset_halt_cpu[] = {
FLOW_CTRL_HALT_CPU0_EVENTS,
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
index c01d047..b17c4ba 100644
--- a/arch/arm/mach-tegra/fuse.h
+++ b/arch/arm/mach-tegra/fuse.h
@@ -26,21 +26,7 @@
#define SKU_ID_AP25E 27
#define SKU_ID_T25E 28
-#define TEGRA20 0x20
-#define TEGRA30 0x30
-#define TEGRA114 0x35
-#define TEGRA124 0x40
-
#ifndef __ASSEMBLY__
-enum tegra_revision {
- TEGRA_REVISION_UNKNOWN = 0,
- TEGRA_REVISION_A01,
- TEGRA_REVISION_A02,
- TEGRA_REVISION_A03,
- TEGRA_REVISION_A03p,
- TEGRA_REVISION_A04,
- TEGRA_REVISION_MAX,
-};
extern int tegra_sku_id;
extern int tegra_cpu_process_id;
@@ -48,12 +34,8 @@ extern int tegra_core_process_id;
extern int tegra_chip_id;
extern int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
extern int tegra_soc_speedo_id;
-extern enum tegra_revision tegra_revision;
-
-extern int tegra_bct_strapping;
unsigned long long tegra_chip_uid(void);
-void tegra_init_fuse(void);
bool tegra_spare_fuse(int bit);
u32 tegra_fuse_readl(unsigned long offset);
diff --git a/arch/arm/mach-tegra/hotplug.c b/arch/arm/mach-tegra/hotplug.c
index ff26af2..38c5170 100644
--- a/arch/arm/mach-tegra/hotplug.c
+++ b/arch/arm/mach-tegra/hotplug.c
@@ -10,10 +10,10 @@
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/smp_plat.h>
-#include "fuse.h"
#include "sleep.h"
static void (*tegra_hotplug_shutdown)(void);
diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
index 929d104..d9878ac 100644
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@@ -19,13 +19,13 @@
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/cacheflush.h>
#include <asm/mach-types.h>
#include <asm/smp_scu.h>
#include <asm/smp_plat.h>
-#include "fuse.h"
#include "flowctrl.h"
#include "reset.h"
#include "pmc.h"
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index f55b05a..d7e6370 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -26,6 +26,7 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/smp_plat.h>
#include <asm/cacheflush.h>
@@ -37,7 +38,6 @@
#include "iomap.h"
#include "reset.h"
#include "flowctrl.h"
-#include "fuse.h"
#include "pm.h"
#include "pmc.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c
index fb79202..d8fe587 100644
--- a/arch/arm/mach-tegra/pmc.c
+++ b/arch/arm/mach-tegra/pmc.c
@@ -21,9 +21,9 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/tegra-powergate.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
-#include "fuse.h"
#include "pm.h"
#include "pmc.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c
index 4cefc5c..50a9af4 100644
--- a/arch/arm/mach-tegra/powergate.c
+++ b/arch/arm/mach-tegra/powergate.c
@@ -30,8 +30,8 @@
#include <linux/spinlock.h>
#include <linux/clk/tegra.h>
#include <linux/tegra-powergate.h>
+#include <linux/tegra-soc.h>
-#include "fuse.h"
#include "iomap.h"
#define DPD_SAMPLE 0x020
diff --git a/arch/arm/mach-tegra/reset-handler.S b/arch/arm/mach-tegra/reset-handler.S
index 8c1ba4f..0c480d69 100644
--- a/arch/arm/mach-tegra/reset-handler.S
+++ b/arch/arm/mach-tegra/reset-handler.S
@@ -20,9 +20,9 @@
#include <asm/cache.h>
#include <asm/asm-offsets.h>
#include <asm/hardware/cache-l2x0.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
-#include "fuse.h"
#include "iomap.h"
#include "reset.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c
index 146fe8e..203bac5 100644
--- a/arch/arm/mach-tegra/reset.c
+++ b/arch/arm/mach-tegra/reset.c
@@ -22,12 +22,12 @@
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/firmware.h>
+#include <linux/tegra-soc.h>
#include "iomap.h"
#include "irammap.h"
#include "reset.h"
#include "sleep.h"
-#include "fuse.h"
#define TEGRA_IRAM_RESET_BASE (TEGRA_IRAM_BASE + \
TEGRA_IRAM_RESET_HANDLER_OFFSET)
diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S
index b16d4a57..f808c2c 100644
--- a/arch/arm/mach-tegra/sleep-tegra30.S
+++ b/arch/arm/mach-tegra/sleep-tegra30.S
@@ -15,13 +15,13 @@
*/
#include <linux/linkage.h>
+#include <linux/tegra-soc.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/cache.h>
#include "irammap.h"
-#include "fuse.h"
#include "sleep.h"
#include "flowctrl.h"
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 6191603..e48b271 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -34,6 +34,7 @@
#include <linux/usb/tegra_usb_phy.h>
#include <linux/clk/tegra.h>
#include <linux/irqchip.h>
+#include <linux/tegra-soc.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach-types.h>
@@ -46,7 +47,6 @@
#include "board.h"
#include "common.h"
#include "cpuidle.h"
-#include "fuse.h"
#include "iomap.h"
#include "irq.h"
#include "pmc.h"
diff --git a/arch/arm/mach-tegra/tegra114_speedo.c b/arch/arm/mach-tegra/tegra114_speedo.c
index 5218d48..7c73716 100644
--- a/arch/arm/mach-tegra/tegra114_speedo.c
+++ b/arch/arm/mach-tegra/tegra114_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/arch/arm/mach-tegra/tegra20_speedo.c b/arch/arm/mach-tegra/tegra20_speedo.c
index fa6eb57..3b1bb53 100644
--- a/arch/arm/mach-tegra/tegra20_speedo.c
+++ b/arch/arm/mach-tegra/tegra20_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/arch/arm/mach-tegra/tegra30_speedo.c b/arch/arm/mach-tegra/tegra30_speedo.c
index 125cb16..81a958d 100644
--- a/arch/arm/mach-tegra/tegra30_speedo.c
+++ b/arch/arm/mach-tegra/tegra30_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index b02d73b..db93b77 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -17,8 +17,29 @@
#ifndef __LINUX_TEGRA_SOC_H_
#define __LINUX_TEGRA_SOC_H_
+#define TEGRA20 0x20
+#define TEGRA30 0x30
+#define TEGRA114 0x35
+#define TEGRA124 0x40
+
+#ifndef __ASSEMBLY__
+
+enum tegra_revision {
+ TEGRA_REVISION_UNKNOWN = 0,
+ TEGRA_REVISION_A01,
+ TEGRA_REVISION_A02,
+ TEGRA_REVISION_A03,
+ TEGRA_REVISION_A03p,
+ TEGRA_REVISION_A04,
+ TEGRA_REVISION_MAX,
+};
+
+u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
+void tegra_init_fuse(void);
+extern int tegra_chip_id;
+extern enum tegra_revision tegra_revision;
#if defined(CONFIG_TEGRA20_APB_DMA)
int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
@@ -33,4 +54,7 @@ static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
return -EINVAL;
}
#endif
+
+#endif /* __ASSEMBLY__ */
+
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 2/6] ARM: tegra: move fuse exports to tegra-soc.h
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Russell King, Stephen Warren, Thierry Reding, Joseph Lo,
Paul Gortmaker, Stefan Agner, Tejun Heo, Olof Johansson,
Bjorn Helgaas, Alexandre Courbot, Tomasz Figa,
Sebastian Hesselbarth, Tuomas Tynkkynen, linux-arm-kernel,
linux-tegra, linux-kernel
All fuse related functionality will move to a driver in the following patches.
To prepare for this, export all the required functionality in a global header
file and move all users of fuse.h to tegra-soc.h. While we're at it, remove
tegra_bct_strapping, as its only user was removed in Commit a7cbe92cef27
("ARM: tegra: remove tegra EMC scaling driver").
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
arch/arm/mach-tegra/cpuidle.c | 2 +-
arch/arm/mach-tegra/flowctrl.c | 2 +-
arch/arm/mach-tegra/fuse.h | 18 ------------------
arch/arm/mach-tegra/hotplug.c | 2 +-
arch/arm/mach-tegra/platsmp.c | 2 +-
arch/arm/mach-tegra/pm.c | 2 +-
arch/arm/mach-tegra/pmc.c | 2 +-
arch/arm/mach-tegra/powergate.c | 2 +-
arch/arm/mach-tegra/reset-handler.S | 2 +-
arch/arm/mach-tegra/reset.c | 2 +-
arch/arm/mach-tegra/sleep-tegra30.S | 2 +-
arch/arm/mach-tegra/tegra.c | 2 +-
arch/arm/mach-tegra/tegra114_speedo.c | 1 +
arch/arm/mach-tegra/tegra20_speedo.c | 1 +
arch/arm/mach-tegra/tegra30_speedo.c | 1 +
include/linux/tegra-soc.h | 24 ++++++++++++++++++++++++
16 files changed, 38 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c
index 7bc5d8d..ff0a10b 100644
--- a/arch/arm/mach-tegra/cpuidle.c
+++ b/arch/arm/mach-tegra/cpuidle.c
@@ -23,8 +23,8 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/tegra-soc.h>
-#include "fuse.h"
#include "cpuidle.h"
void __init tegra_cpuidle_init(void)
diff --git a/arch/arm/mach-tegra/flowctrl.c b/arch/arm/mach-tegra/flowctrl.c
index ce8ab8a..4b31091 100644
--- a/arch/arm/mach-tegra/flowctrl.c
+++ b/arch/arm/mach-tegra/flowctrl.c
@@ -22,10 +22,10 @@
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/cpumask.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
#include "iomap.h"
-#include "fuse.h"
static u8 flowctrl_offset_halt_cpu[] = {
FLOW_CTRL_HALT_CPU0_EVENTS,
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
index c01d047..b17c4ba 100644
--- a/arch/arm/mach-tegra/fuse.h
+++ b/arch/arm/mach-tegra/fuse.h
@@ -26,21 +26,7 @@
#define SKU_ID_AP25E 27
#define SKU_ID_T25E 28
-#define TEGRA20 0x20
-#define TEGRA30 0x30
-#define TEGRA114 0x35
-#define TEGRA124 0x40
-
#ifndef __ASSEMBLY__
-enum tegra_revision {
- TEGRA_REVISION_UNKNOWN = 0,
- TEGRA_REVISION_A01,
- TEGRA_REVISION_A02,
- TEGRA_REVISION_A03,
- TEGRA_REVISION_A03p,
- TEGRA_REVISION_A04,
- TEGRA_REVISION_MAX,
-};
extern int tegra_sku_id;
extern int tegra_cpu_process_id;
@@ -48,12 +34,8 @@ extern int tegra_core_process_id;
extern int tegra_chip_id;
extern int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
extern int tegra_soc_speedo_id;
-extern enum tegra_revision tegra_revision;
-
-extern int tegra_bct_strapping;
unsigned long long tegra_chip_uid(void);
-void tegra_init_fuse(void);
bool tegra_spare_fuse(int bit);
u32 tegra_fuse_readl(unsigned long offset);
diff --git a/arch/arm/mach-tegra/hotplug.c b/arch/arm/mach-tegra/hotplug.c
index ff26af2..38c5170 100644
--- a/arch/arm/mach-tegra/hotplug.c
+++ b/arch/arm/mach-tegra/hotplug.c
@@ -10,10 +10,10 @@
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/smp_plat.h>
-#include "fuse.h"
#include "sleep.h"
static void (*tegra_hotplug_shutdown)(void);
diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
index 929d104..d9878ac 100644
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@@ -19,13 +19,13 @@
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/cacheflush.h>
#include <asm/mach-types.h>
#include <asm/smp_scu.h>
#include <asm/smp_plat.h>
-#include "fuse.h"
#include "flowctrl.h"
#include "reset.h"
#include "pmc.h"
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index f55b05a..d7e6370 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -26,6 +26,7 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/clk/tegra.h>
+#include <linux/tegra-soc.h>
#include <asm/smp_plat.h>
#include <asm/cacheflush.h>
@@ -37,7 +38,6 @@
#include "iomap.h"
#include "reset.h"
#include "flowctrl.h"
-#include "fuse.h"
#include "pm.h"
#include "pmc.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c
index fb79202..d8fe587 100644
--- a/arch/arm/mach-tegra/pmc.c
+++ b/arch/arm/mach-tegra/pmc.c
@@ -21,9 +21,9 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/tegra-powergate.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
-#include "fuse.h"
#include "pm.h"
#include "pmc.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c
index 4cefc5c..50a9af4 100644
--- a/arch/arm/mach-tegra/powergate.c
+++ b/arch/arm/mach-tegra/powergate.c
@@ -30,8 +30,8 @@
#include <linux/spinlock.h>
#include <linux/clk/tegra.h>
#include <linux/tegra-powergate.h>
+#include <linux/tegra-soc.h>
-#include "fuse.h"
#include "iomap.h"
#define DPD_SAMPLE 0x020
diff --git a/arch/arm/mach-tegra/reset-handler.S b/arch/arm/mach-tegra/reset-handler.S
index 8c1ba4f..0c480d69 100644
--- a/arch/arm/mach-tegra/reset-handler.S
+++ b/arch/arm/mach-tegra/reset-handler.S
@@ -20,9 +20,9 @@
#include <asm/cache.h>
#include <asm/asm-offsets.h>
#include <asm/hardware/cache-l2x0.h>
+#include <linux/tegra-soc.h>
#include "flowctrl.h"
-#include "fuse.h"
#include "iomap.h"
#include "reset.h"
#include "sleep.h"
diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c
index 146fe8e..203bac5 100644
--- a/arch/arm/mach-tegra/reset.c
+++ b/arch/arm/mach-tegra/reset.c
@@ -22,12 +22,12 @@
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/firmware.h>
+#include <linux/tegra-soc.h>
#include "iomap.h"
#include "irammap.h"
#include "reset.h"
#include "sleep.h"
-#include "fuse.h"
#define TEGRA_IRAM_RESET_BASE (TEGRA_IRAM_BASE + \
TEGRA_IRAM_RESET_HANDLER_OFFSET)
diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S
index b16d4a57..f808c2c 100644
--- a/arch/arm/mach-tegra/sleep-tegra30.S
+++ b/arch/arm/mach-tegra/sleep-tegra30.S
@@ -15,13 +15,13 @@
*/
#include <linux/linkage.h>
+#include <linux/tegra-soc.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/cache.h>
#include "irammap.h"
-#include "fuse.h"
#include "sleep.h"
#include "flowctrl.h"
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 6191603..e48b271 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -34,6 +34,7 @@
#include <linux/usb/tegra_usb_phy.h>
#include <linux/clk/tegra.h>
#include <linux/irqchip.h>
+#include <linux/tegra-soc.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach-types.h>
@@ -46,7 +47,6 @@
#include "board.h"
#include "common.h"
#include "cpuidle.h"
-#include "fuse.h"
#include "iomap.h"
#include "irq.h"
#include "pmc.h"
diff --git a/arch/arm/mach-tegra/tegra114_speedo.c b/arch/arm/mach-tegra/tegra114_speedo.c
index 5218d48..7c73716 100644
--- a/arch/arm/mach-tegra/tegra114_speedo.c
+++ b/arch/arm/mach-tegra/tegra114_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/arch/arm/mach-tegra/tegra20_speedo.c b/arch/arm/mach-tegra/tegra20_speedo.c
index fa6eb57..3b1bb53 100644
--- a/arch/arm/mach-tegra/tegra20_speedo.c
+++ b/arch/arm/mach-tegra/tegra20_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/arch/arm/mach-tegra/tegra30_speedo.c b/arch/arm/mach-tegra/tegra30_speedo.c
index 125cb16..81a958d 100644
--- a/arch/arm/mach-tegra/tegra30_speedo.c
+++ b/arch/arm/mach-tegra/tegra30_speedo.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index b02d73b..db93b77 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -17,8 +17,29 @@
#ifndef __LINUX_TEGRA_SOC_H_
#define __LINUX_TEGRA_SOC_H_
+#define TEGRA20 0x20
+#define TEGRA30 0x30
+#define TEGRA114 0x35
+#define TEGRA124 0x40
+
+#ifndef __ASSEMBLY__
+
+enum tegra_revision {
+ TEGRA_REVISION_UNKNOWN = 0,
+ TEGRA_REVISION_A01,
+ TEGRA_REVISION_A02,
+ TEGRA_REVISION_A03,
+ TEGRA_REVISION_A03p,
+ TEGRA_REVISION_A04,
+ TEGRA_REVISION_MAX,
+};
+
+u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
+void tegra_init_fuse(void);
+extern int tegra_chip_id;
+extern enum tegra_revision tegra_revision;
#if defined(CONFIG_TEGRA20_APB_DMA)
int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
@@ -33,4 +54,7 @@ static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
return -EINVAL;
}
#endif
+
+#endif /* __ASSEMBLY__ */
+
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v8 3/6] misc: fuse: Add efuse driver for Tegra
2014-06-12 15:36 ` Peter De Schrijver
@ 2014-06-12 15:36 ` Peter De Schrijver
-1 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Randy Dunlap, Stephen Warren, Thierry Reding, Grant Likely,
Rob Herring, linux-doc-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA
Implement fuse driver for Tegra20, Tegra30, Tegra114 and Tegra124.
Signed-off-by: Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
Documentation/ABI/testing/sysfs-driver-tegra-fuse | 11 +
drivers/misc/fuse/Makefile | 1 +
drivers/misc/fuse/tegra/Makefile | 8 +
drivers/misc/fuse/tegra/fuse-tegra.c | 144 +++++++++++
drivers/misc/fuse/tegra/fuse-tegra20.c | 141 ++++++++++
drivers/misc/fuse/tegra/fuse-tegra30.c | 223 ++++++++++++++++
drivers/misc/fuse/tegra/fuse.h | 71 +++++
drivers/misc/fuse/tegra/speedo-tegra114.c | 109 ++++++++
drivers/misc/fuse/tegra/speedo-tegra124.c | 167 ++++++++++++
drivers/misc/fuse/tegra/speedo-tegra20.c | 109 ++++++++
drivers/misc/fuse/tegra/speedo-tegra30.c | 287 +++++++++++++++++++++
drivers/misc/fuse/tegra/tegra-apbmisc.c | 110 ++++++++
include/linux/tegra-soc.h | 18 ++
13 files changed, 1399 insertions(+), 0 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-driver-tegra-fuse
create mode 100644 drivers/misc/fuse/Makefile
create mode 100644 drivers/misc/fuse/tegra/Makefile
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra.c
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra20.c
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra30.c
create mode 100644 drivers/misc/fuse/tegra/fuse.h
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra114.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra124.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra20.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra30.c
create mode 100644 drivers/misc/fuse/tegra/tegra-apbmisc.c
diff --git a/Documentation/ABI/testing/sysfs-driver-tegra-fuse b/Documentation/ABI/testing/sysfs-driver-tegra-fuse
new file mode 100644
index 0000000..69f5af6
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-driver-tegra-fuse
@@ -0,0 +1,11 @@
+What: /sys/devices/*/<our-device>/fuse
+Date: February 2014
+Contact: Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
+Description: read-only access to the efuses on Tegra20, Tegra30, Tegra114
+ and Tegra124 SoC's from NVIDIA. The efuses contain write once
+ data programmed at the factory. The data is layed out in 32bit
+ words in LSB first format. Each bit represents a single value
+ as decoded from the fuse registers. Bits order/assignment
+ exactly matches the HW registers, including any unused bits.
+Users: any user space application which wants to read the efuses on
+ Tegra SoC's
diff --git a/drivers/misc/fuse/Makefile b/drivers/misc/fuse/Makefile
new file mode 100644
index 0000000..0679c4f
--- /dev/null
+++ b/drivers/misc/fuse/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_ARCH_TEGRA) += tegra/
diff --git a/drivers/misc/fuse/tegra/Makefile b/drivers/misc/fuse/tegra/Makefile
new file mode 100644
index 0000000..3af357d
--- /dev/null
+++ b/drivers/misc/fuse/tegra/Makefile
@@ -0,0 +1,8 @@
+obj-y += fuse-tegra.o
+obj-y += fuse-tegra30.o
+obj-y += tegra-apbmisc.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += fuse-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += speedo-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += speedo-tegra30.o
+obj-$(CONFIG_ARCH_TEGRA_114_SOC) += speedo-tegra114.o
+obj-$(CONFIG_ARCH_TEGRA_124_SOC) += speedo-tegra124.o
diff --git a/drivers/misc/fuse/tegra/fuse-tegra.c b/drivers/misc/fuse/tegra/fuse-tegra.c
new file mode 100644
index 0000000..3fa6f74
--- /dev/null
+++ b/drivers/misc/fuse/tegra/fuse-tegra.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/kobject.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+static u32 (*fuse_readl)(const unsigned int offset);
+static int fuse_size;
+struct tegra_sku_info tegra_sku_info;
+
+static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
+ [TEGRA_REVISION_UNKNOWN] = "unknown",
+ [TEGRA_REVISION_A01] = "A01",
+ [TEGRA_REVISION_A02] = "A02",
+ [TEGRA_REVISION_A03] = "A03",
+ [TEGRA_REVISION_A03p] = "A03 prime",
+ [TEGRA_REVISION_A04] = "A04",
+};
+
+static u8 fuse_readb(const unsigned int offset)
+{
+ u32 val;
+
+ val = fuse_readl(round_down(offset, 4));
+ val >>= (offset % 4) * 8;
+ val &= 0xff;
+
+ return val;
+}
+
+static ssize_t fuse_read(struct file *fd, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t pos, size_t size)
+{
+ int i;
+
+ if (pos < 0 || pos >= fuse_size)
+ return 0;
+
+ if (size > fuse_size - pos)
+ size = fuse_size - pos;
+
+ for (i = 0; i < size; i++)
+ buf[i] = fuse_readb(pos + i);
+
+ return i;
+}
+
+static struct bin_attribute fuse_bin_attr = {
+ .attr = { .name = "fuse", .mode = S_IRUGO, },
+ .read = fuse_read,
+};
+
+static const struct of_device_id car_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-car", },
+ { .compatible = "nvidia,tegra30-car", },
+ { .compatible = "nvidia,tegra114-car", },
+ { .compatible = "nvidia,tegra124-car", },
+ {},
+};
+
+static void tegra_enable_fuse_clk(void __iomem *base)
+{
+ u32 reg;
+
+ reg = readl_relaxed(base + 0x48);
+ reg |= 1 << 28;
+ writel(reg, base + 0x48);
+
+ /*
+ * Enable FUSE clock. This needs to be hardcoded because the clock
+ * subsystem is not active during early boot.
+ */
+ reg = readl(base + 0x14);
+ reg |= 1 << 7;
+ writel(reg, base + 0x14);
+}
+
+int tegra_fuse_create_sysfs(struct device *dev, int size,
+ u32 (*readl)(const unsigned int offset))
+{
+ if (fuse_size)
+ return -ENODEV;
+
+ fuse_bin_attr.size = size;
+ fuse_bin_attr.read = fuse_read;
+
+ fuse_size = size;
+ fuse_readl = readl;
+
+ return device_create_bin_file(dev, &fuse_bin_attr);
+}
+
+void __init tegra_init_fuse(void)
+{
+ struct device_node *np;
+ void __iomem *car_base;
+
+ tegra_init_apbmisc();
+
+ np = of_find_matching_node(NULL, car_match);
+ car_base = of_iomap(np, 0);
+ if (car_base) {
+ tegra_enable_fuse_clk(car_base);
+ iounmap(car_base);
+ } else {
+ pr_err("Could not enable fuse clk. ioremap tegra car failed.\n");
+ return;
+ }
+
+ if (tegra_chip_id == TEGRA20)
+ tegra20_init_fuse_early();
+ else
+ tegra30_init_fuse_early();
+
+ pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
+ tegra_revision_name[tegra_sku_info.revision],
+ tegra_sku_info.sku_id, tegra_sku_info.cpu_process_id,
+ tegra_sku_info.core_process_id);
+ pr_debug("Tegra CPU Speedo ID %d, Soc Speedo ID %d\n",
+ tegra_sku_info.cpu_speedo_id, tegra_sku_info.soc_speedo_id);
+}
diff --git a/drivers/misc/fuse/tegra/fuse-tegra20.c b/drivers/misc/fuse/tegra/fuse-tegra20.c
new file mode 100644
index 0000000..09f91bf
--- /dev/null
+++ b/drivers/misc/fuse/tegra/fuse-tegra20.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Based on drivers/misc/eeprom/sunxi_sid.c
+ */
+
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/kobject.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define FUSE_BEGIN 0x100
+#define FUSE_SIZE 0x1f8
+#define FUSE_UID_LOW 0x08
+#define FUSE_UID_HIGH 0x0c
+
+static phys_addr_t fuse_phys;
+static struct clk *fuse_clk;
+static void __iomem __initdata *fuse_base;
+
+static u32 tegra20_fuse_readl(const unsigned int offset)
+{
+ int ret;
+ u32 val;
+
+ clk_prepare_enable(fuse_clk);
+
+ ret = tegra_apb_readl_using_dma(fuse_phys + FUSE_BEGIN + offset, &val);
+
+ clk_disable_unprepare(fuse_clk);
+
+ return (ret < 0) ? 0 : val;
+}
+
+static const struct of_device_id tegra20_fuse_of_match[] = {
+ { .compatible = "nvidia,tegra20-efuse" },
+ {},
+};
+
+static int tegra20_fuse_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ fuse_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fuse_clk)) {
+ dev_err(&pdev->dev, "missing clock");
+ return PTR_ERR(fuse_clk);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+ fuse_phys = res->start;
+
+ if (tegra_fuse_create_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl))
+ return -ENODEV;
+
+ dev_dbg(&pdev->dev, "loaded\n");
+
+ return 0;
+}
+
+static struct platform_driver tegra20_fuse_driver = {
+ .probe = tegra20_fuse_probe,
+ .driver = {
+ .name = "tegra20_fuse",
+ .owner = THIS_MODULE,
+ .of_match_table = tegra20_fuse_of_match,
+ }
+};
+
+static int __init tegra20_fuse_init(void)
+{
+ return platform_driver_register(&tegra20_fuse_driver);
+}
+postcore_initcall(tegra20_fuse_init);
+
+/* Early boot code. This code is called before the devices are created */
+
+u32 __init tegra20_fuse_early(const unsigned int offset)
+{
+ return readl_relaxed(fuse_base + FUSE_BEGIN + offset);
+}
+
+bool __init tegra20_spare_fuse_early(int spare_bit)
+{
+ u32 offset = spare_bit * 4;
+ bool value;
+
+ value = tegra20_fuse_early(offset + 0x100);
+
+ return value;
+}
+
+static void __init tegra20_fuse_add_randomness(void)
+{
+ u32 randomness[7];
+
+ randomness[0] = tegra_sku_info.sku_id;
+ randomness[1] = tegra_read_straps();
+ randomness[2] = tegra_read_chipid();
+ randomness[3] = tegra_sku_info.cpu_process_id << 16;
+ randomness[3] |= tegra_sku_info.core_process_id;
+ randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
+ randomness[4] |= tegra_sku_info.soc_speedo_id;
+ randomness[5] = tegra20_fuse_early(FUSE_UID_LOW);
+ randomness[6] = tegra20_fuse_early(FUSE_UID_HIGH);
+
+ add_device_randomness(randomness, sizeof(randomness));
+}
+
+void __init tegra20_init_fuse_early(void)
+{
+ fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE);
+
+ tegra_init_revision();
+ tegra20_init_speedo_data(&tegra_sku_info);
+ tegra20_fuse_add_randomness();
+
+ iounmap(fuse_base);
+}
diff --git a/drivers/misc/fuse/tegra/fuse-tegra30.c b/drivers/misc/fuse/tegra/fuse-tegra30.c
new file mode 100644
index 0000000..8aef5d0
--- /dev/null
+++ b/drivers/misc/fuse/tegra/fuse-tegra30.c
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define FUSE_BEGIN 0x100
+
+/* Tegra30 and later */
+#define FUSE_VENDOR_CODE 0x100
+#define FUSE_FAB_CODE 0x104
+#define FUSE_LOT_CODE_0 0x108
+#define FUSE_LOT_CODE_1 0x10c
+#define FUSE_WAFER_ID 0x110
+#define FUSE_X_COORDINATE 0x114
+#define FUSE_Y_COORDINATE 0x118
+
+#define FUSE_HAS_REVISION_INFO BIT(0)
+
+enum speedo_idx {
+ SPEEDO_TEGRA30 = 0,
+ SPEEDO_TEGRA114,
+ SPEEDO_TEGRA124,
+};
+
+struct tegra_fuse_info {
+ int size;
+ int spare_bit;
+ enum speedo_idx speedo_idx;
+};
+
+static void __iomem *fuse_base;
+static struct clk *fuse_clk;
+static struct tegra_fuse_info *fuse_info;
+
+u32 tegra30_fuse_readl(const unsigned int offset)
+{
+ u32 val;
+
+ /*
+ * early in the boot, the fuse clock will be enabled by
+ * tegra_init_fuse()
+ */
+
+ if (fuse_clk)
+ clk_prepare_enable(fuse_clk);
+
+ val = readl_relaxed(fuse_base + FUSE_BEGIN + offset);
+
+ if (fuse_clk)
+ clk_disable_unprepare(fuse_clk);
+
+ return val;
+}
+
+static struct tegra_fuse_info tegra30_info = {
+ .size = 0x2a4,
+ .spare_bit = 0x144,
+ .speedo_idx = SPEEDO_TEGRA30,
+};
+
+static struct tegra_fuse_info tegra114_info = {
+ .size = 0x2a0,
+ .speedo_idx = SPEEDO_TEGRA114,
+};
+
+static struct tegra_fuse_info tegra124_info = {
+ .size = 0x300,
+ .speedo_idx = SPEEDO_TEGRA124,
+};
+
+static const struct of_device_id tegra30_fuse_of_match[] = {
+ { .compatible = "nvidia,tegra30-efuse", .data = &tegra30_info },
+ { .compatible = "nvidia,tegra114-efuse", .data = &tegra114_info },
+ { .compatible = "nvidia,tegra124-efuse", .data = &tegra124_info },
+ {},
+};
+
+static int tegra30_fuse_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *of_dev_id;
+
+ of_dev_id = of_match_device(tegra30_fuse_of_match, &pdev->dev);
+ if (!of_dev_id)
+ return -ENODEV;
+
+ fuse_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fuse_clk)) {
+ dev_err(&pdev->dev, "missing clock");
+ return PTR_ERR(fuse_clk);
+ }
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (tegra_fuse_create_sysfs(&pdev->dev, fuse_info->size,
+ tegra30_fuse_readl))
+ return -ENODEV;
+
+ dev_dbg(&pdev->dev, "loaded\n");
+
+ return 0;
+}
+
+static struct platform_driver tegra30_fuse_driver = {
+ .probe = tegra30_fuse_probe,
+ .driver = {
+ .name = "tegra_fuse",
+ .owner = THIS_MODULE,
+ .of_match_table = tegra30_fuse_of_match,
+ }
+};
+
+static int __init tegra30_fuse_init(void)
+{
+ return platform_driver_register(&tegra30_fuse_driver);
+}
+postcore_initcall(tegra30_fuse_init);
+
+/* Early boot code. This code is called before the devices are created */
+
+typedef void (*speedo_f)(struct tegra_sku_info *sku_info);
+
+static speedo_f __initdata speedo_tbl[] = {
+ [SPEEDO_TEGRA30] = tegra30_init_speedo_data,
+ [SPEEDO_TEGRA114] = tegra114_init_speedo_data,
+ [SPEEDO_TEGRA124] = tegra124_init_speedo_data,
+};
+
+static void __init tegra30_fuse_add_randomness(void)
+{
+ u32 randomness[12];
+
+ randomness[0] = tegra_sku_info.sku_id;
+ randomness[1] = tegra_read_straps();
+ randomness[2] = tegra_read_chipid();
+ randomness[3] = tegra_sku_info.cpu_process_id << 16;
+ randomness[3] |= tegra_sku_info.core_process_id;
+ randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
+ randomness[4] |= tegra_sku_info.soc_speedo_id;
+ randomness[5] = tegra30_fuse_readl(FUSE_VENDOR_CODE);
+ randomness[6] = tegra30_fuse_readl(FUSE_FAB_CODE);
+ randomness[7] = tegra30_fuse_readl(FUSE_LOT_CODE_0);
+ randomness[8] = tegra30_fuse_readl(FUSE_LOT_CODE_1);
+ randomness[9] = tegra30_fuse_readl(FUSE_WAFER_ID);
+ randomness[10] = tegra30_fuse_readl(FUSE_X_COORDINATE);
+ randomness[11] = tegra30_fuse_readl(FUSE_Y_COORDINATE);
+
+ add_device_randomness(randomness, sizeof(randomness));
+}
+
+static void __init legacy_fuse_init(void)
+{
+ switch (tegra_chip_id) {
+ case TEGRA30:
+ fuse_info = &tegra30_info;
+ break;
+ case TEGRA114:
+ fuse_info = &tegra114_info;
+ break;
+ case TEGRA124:
+ fuse_info = &tegra124_info;
+ break;
+ default:
+ return;
+ }
+
+ fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE);
+}
+
+bool __init tegra30_spare_fuse(int spare_bit)
+{
+ u32 offset = fuse_info->spare_bit + spare_bit * 4;
+
+ return tegra30_fuse_readl(offset) & 1;
+}
+
+void __init tegra30_init_fuse_early(void)
+{
+ struct device_node *np;
+ const struct of_device_id *of_match;
+
+ np = of_find_matching_node_and_match(NULL, tegra30_fuse_of_match,
+ &of_match);
+ if (np) {
+ fuse_base = of_iomap(np, 0);
+ fuse_info = (struct tegra_fuse_info *)of_match->data;
+ } else
+ legacy_fuse_init();
+
+ if (!fuse_base) {
+ pr_warn("fuse DT node missing and unknown chip id: 0x%02x\n",
+ tegra_chip_id);
+ return;
+ }
+
+ tegra_init_revision();
+ speedo_tbl[fuse_info->speedo_idx](&tegra_sku_info);
+ tegra30_fuse_add_randomness();
+}
diff --git a/drivers/misc/fuse/tegra/fuse.h b/drivers/misc/fuse/tegra/fuse.h
new file mode 100644
index 0000000..b344277
--- /dev/null
+++ b/drivers/misc/fuse/tegra/fuse.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author:
+ * Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __DRIVERS_MISC_TEGRA_FUSE_H
+#define __DRIVERS_MISC_TEGRA_FUSE_H
+
+#define TEGRA_FUSE_BASE 0x7000f800
+#define TEGRA_FUSE_SIZE 0x400
+
+int tegra_fuse_create_sysfs(struct device *dev, int size,
+ u32 (*readl)(const unsigned int offset));
+
+bool tegra30_spare_fuse(int bit);
+u32 tegra30_fuse_readl(const unsigned int offset);
+void tegra30_init_fuse_early(void);
+void tegra_init_revision(void);
+void tegra_init_apbmisc(void);
+
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+void tegra20_init_speedo_data(struct tegra_sku_info *sku_info);
+bool tegra20_spare_fuse_early(int spare_bit);
+void tegra20_init_fuse_early(void);
+u32 tegra20_fuse_early(const unsigned int offset);
+#else
+static inline void tegra20_init_speedo_data(struct tegra_sku_info *sku_info) {}
+static inline bool tegra20_spare_fuse_early(int spare_bit, void *fuse_base)
+{
+ return false;
+}
+static inline void tegra20_init_fuse_early(void);
+static inline tegra20_fuse_early(const unsigned int offset);
+{
+ return 0;
+}
+#endif
+
+
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+void tegra30_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra30_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+void tegra114_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra114_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_124_SOC
+void tegra124_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra124_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#endif
diff --git a/drivers/misc/fuse/tegra/speedo-tegra114.c b/drivers/misc/fuse/tegra/speedo-tegra114.c
new file mode 100644
index 0000000..98d6cde
--- /dev/null
+++ b/drivers/misc/fuse/tegra/speedo-tegra114.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CORE_PROCESS_CORNERS 2
+#define CPU_PROCESS_CORNERS 2
+
+enum {
+ THRESHOLD_INDEX_0,
+ THRESHOLD_INDEX_1,
+ THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
+ {1123, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+ {1695, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+ int *threshold)
+{
+ u32 tmp;
+ u32 sku = sku_info->sku_id;
+ enum tegra_revision rev = sku_info->revision;
+
+ switch (sku) {
+ case 0x00:
+ case 0x10:
+ case 0x05:
+ case 0x06:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 0;
+ *threshold = THRESHOLD_INDEX_0;
+ break;
+
+ case 0x03:
+ case 0x04:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 1;
+ *threshold = THRESHOLD_INDEX_1;
+ break;
+
+ default:
+ pr_err("Tegra Unknown SKU %d\n", sku);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ *threshold = THRESHOLD_INDEX_0;
+ break;
+ }
+
+ if (rev == TEGRA_REVISION_A01) {
+ tmp = tegra30_fuse_readl(0x270) << 1;
+ tmp |= tegra30_fuse_readl(0x26c);
+ if (!tmp)
+ sku_info->cpu_speedo_id = 0;
+ }
+}
+
+void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ u32 cpu_speedo_val;
+ u32 core_speedo_val;
+ int threshold;
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+
+ rev_sku_to_speedo_ids(sku_info, &threshold);
+
+ cpu_speedo_val = tegra30_fuse_readl(0x12c) + 1024;
+ core_speedo_val = tegra30_fuse_readl(0x134);
+
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++)
+ if (cpu_speedo_val < cpu_process_speedos[threshold][i])
+ break;
+ sku_info->cpu_process_id = i;
+
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++)
+ if (core_speedo_val < core_process_speedos[threshold][i])
+ break;
+ sku_info->core_process_id = i;
+}
diff --git a/drivers/misc/fuse/tegra/speedo-tegra124.c b/drivers/misc/fuse/tegra/speedo-tegra124.c
new file mode 100644
index 0000000..a15dd53
--- /dev/null
+++ b/drivers/misc/fuse/tegra/speedo-tegra124.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CPU_PROCESS_CORNERS 2
+#define GPU_PROCESS_CORNERS 2
+#define CORE_PROCESS_CORNERS 2
+
+#define FUSE_CPU_SPEEDO_0 0x14
+#define FUSE_CPU_SPEEDO_1 0x2c
+#define FUSE_CPU_SPEEDO_2 0x30
+#define FUSE_SOC_SPEEDO_0 0x34
+#define FUSE_SOC_SPEEDO_1 0x38
+#define FUSE_SOC_SPEEDO_2 0x3c
+#define FUSE_CPU_IDDQ 0x18
+#define FUSE_SOC_IDDQ 0x40
+#define FUSE_GPU_IDDQ 0x128
+#define FUSE_FT_REV 0x28
+
+enum {
+ THRESHOLD_INDEX_0,
+ THRESHOLD_INDEX_1,
+ THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+ {2190, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
+ {1965, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
+ {2101, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+ int *threshold)
+{
+ int sku = sku_info->sku_id;
+
+ /* Assign to default */
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ sku_info->gpu_speedo_id = 0;
+ *threshold = THRESHOLD_INDEX_0;
+
+ switch (sku) {
+ case 0x00: /* Eng sku */
+ case 0x0F:
+ case 0x23:
+ /* Using the default */
+ break;
+ case 0x83:
+ sku_info->cpu_speedo_id = 2;
+ break;
+
+ case 0x1F:
+ case 0x87:
+ case 0x27:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 0;
+ sku_info->gpu_speedo_id = 1;
+ *threshold = THRESHOLD_INDEX_0;
+ break;
+ case 0x81:
+ case 0x21:
+ case 0x07:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
+ sku_info->gpu_speedo_id = 1;
+ *threshold = THRESHOLD_INDEX_1;
+ break;
+ case 0x49:
+ case 0x4A:
+ case 0x48:
+ sku_info->cpu_speedo_id = 4;
+ sku_info->soc_speedo_id = 2;
+ sku_info->gpu_speedo_id = 3;
+ *threshold = THRESHOLD_INDEX_1;
+ break;
+ default:
+ pr_err("Tegra Unknown SKU %d\n", sku);
+ /* Using the default for the error case */
+ break;
+ }
+}
+
+void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ int i, threshold, cpu_speedo_0_value, soc_speedo_0_value;
+ int cpu_iddq_value, gpu_iddq_value, soc_iddq_value;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+
+ cpu_speedo_0_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_0);
+
+ /* GPU Speedo is stored in CPU_SPEEDO_2 */
+ sku_info->gpu_speedo_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_2);
+
+ soc_speedo_0_value = tegra30_fuse_readl(FUSE_SOC_SPEEDO_0);
+
+ cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ);
+ soc_iddq_value = tegra30_fuse_readl(FUSE_SOC_IDDQ);
+ gpu_iddq_value = tegra30_fuse_readl(FUSE_GPU_IDDQ);
+
+ sku_info->cpu_speedo_value = cpu_speedo_0_value;
+
+ if (sku_info->cpu_speedo_value == 0) {
+ pr_warn("Tegra Warning: Speedo value not fused.\n");
+ WARN_ON(1);
+ return;
+ }
+
+ rev_sku_to_speedo_ids(sku_info, &threshold);
+
+ sku_info->cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ);
+
+ for (i = 0; i < GPU_PROCESS_CORNERS; i++)
+ if (sku_info->gpu_speedo_value <
+ gpu_process_speedos[threshold][i])
+ break;
+ sku_info->gpu_process_id = i;
+
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++)
+ if (sku_info->cpu_speedo_value <
+ cpu_process_speedos[threshold][i])
+ break;
+ sku_info->cpu_process_id = i;
+
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++)
+ if (soc_speedo_0_value <
+ core_process_speedos[threshold][i])
+ break;
+ sku_info->core_process_id = i;
+
+ pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
+ sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
+}
diff --git a/drivers/misc/fuse/tegra/speedo-tegra20.c b/drivers/misc/fuse/tegra/speedo-tegra20.c
new file mode 100644
index 0000000..c951fa4
--- /dev/null
+++ b/drivers/misc/fuse/tegra/speedo-tegra20.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2012-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CPU_SPEEDO_LSBIT 20
+#define CPU_SPEEDO_MSBIT 29
+#define CPU_SPEEDO_REDUND_LSBIT 30
+#define CPU_SPEEDO_REDUND_MSBIT 39
+#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT)
+
+#define CORE_SPEEDO_LSBIT 40
+#define CORE_SPEEDO_MSBIT 47
+#define CORE_SPEEDO_REDUND_LSBIT 48
+#define CORE_SPEEDO_REDUND_MSBIT 55
+#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT)
+
+#define SPEEDO_MULT 4
+
+#define PROCESS_CORNERS_NUM 4
+
+#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2)
+#define SPEEDO_ID_SELECT_1(sku) \
+ (((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \
+ ((sku) != 27) && ((sku) != 28))
+
+enum {
+ SPEEDO_ID_0,
+ SPEEDO_ID_1,
+ SPEEDO_ID_2,
+ SPEEDO_ID_COUNT,
+};
+
+static const u32 __initconst cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
+ {315, 366, 420, UINT_MAX},
+ {303, 368, 419, UINT_MAX},
+ {316, 331, 383, UINT_MAX},
+};
+
+static const u32 __initconst core_process_speedos[][PROCESS_CORNERS_NUM] = {
+ {165, 195, 224, UINT_MAX},
+ {165, 195, 224, UINT_MAX},
+ {165, 195, 224, UINT_MAX},
+};
+
+void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ u32 reg;
+ u32 val;
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT);
+
+ if (SPEEDO_ID_SELECT_0(sku_info->revision))
+ sku_info->soc_speedo_id = SPEEDO_ID_0;
+ else if (SPEEDO_ID_SELECT_1(sku_info->sku_id))
+ sku_info->soc_speedo_id = SPEEDO_ID_1;
+ else
+ sku_info->soc_speedo_id = SPEEDO_ID_2;
+
+ val = 0;
+ for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
+ reg = tegra20_spare_fuse_early(i) |
+ tegra20_spare_fuse_early(i + CPU_SPEEDO_REDUND_OFFS);
+ val = (val << 1) | (reg & 0x1);
+ }
+ val = val * SPEEDO_MULT;
+ pr_debug("Tegra CPU speedo value %u\n", val);
+
+ for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
+ if (val <= cpu_process_speedos[sku_info->soc_speedo_id][i])
+ break;
+ }
+ sku_info->cpu_process_id = i;
+
+ val = 0;
+ for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) {
+ reg = tegra20_spare_fuse_early(i) |
+ tegra20_spare_fuse_early(i + CORE_SPEEDO_REDUND_OFFS);
+ val = (val << 1) | (reg & 0x1);
+ }
+ val = val * SPEEDO_MULT;
+ pr_debug("Core speedo value %u\n", val);
+
+ for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
+ if (val <= core_process_speedos[sku_info->soc_speedo_id][i])
+ break;
+ }
+ sku_info->core_process_id = i;
+}
diff --git a/drivers/misc/fuse/tegra/speedo-tegra30.c b/drivers/misc/fuse/tegra/speedo-tegra30.c
new file mode 100644
index 0000000..1a85ad8
--- /dev/null
+++ b/drivers/misc/fuse/tegra/speedo-tegra30.c
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 2012-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CORE_PROCESS_CORNERS 1
+#define CPU_PROCESS_CORNERS 6
+
+#define FUSE_SPEEDO_CALIB_0 0x14
+#define FUSE_PACKAGE_INFO 0XFC
+#define FUSE_TEST_PROG_VER 0X28
+
+#define G_SPEEDO_BIT_MINUS1 58
+#define G_SPEEDO_BIT_MINUS1_R 59
+#define G_SPEEDO_BIT_MINUS2 60
+#define G_SPEEDO_BIT_MINUS2_R 61
+#define LP_SPEEDO_BIT_MINUS1 62
+#define LP_SPEEDO_BIT_MINUS1_R 63
+#define LP_SPEEDO_BIT_MINUS2 64
+#define LP_SPEEDO_BIT_MINUS2_R 65
+
+enum {
+ THRESHOLD_INDEX_0,
+ THRESHOLD_INDEX_1,
+ THRESHOLD_INDEX_2,
+ THRESHOLD_INDEX_3,
+ THRESHOLD_INDEX_4,
+ THRESHOLD_INDEX_5,
+ THRESHOLD_INDEX_6,
+ THRESHOLD_INDEX_7,
+ THRESHOLD_INDEX_8,
+ THRESHOLD_INDEX_9,
+ THRESHOLD_INDEX_10,
+ THRESHOLD_INDEX_11,
+ THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
+ {180},
+ {170},
+ {195},
+ {180},
+ {168},
+ {192},
+ {180},
+ {170},
+ {195},
+ {180},
+ {180},
+ {180},
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+ {306, 338, 360, 376, UINT_MAX},
+ {295, 336, 358, 375, UINT_MAX},
+ {325, 325, 358, 375, UINT_MAX},
+ {325, 325, 358, 375, UINT_MAX},
+ {292, 324, 348, 364, UINT_MAX},
+ {324, 324, 348, 364, UINT_MAX},
+ {324, 324, 348, 364, UINT_MAX},
+ {295, 336, 358, 375, UINT_MAX},
+ {358, 358, 358, 358, 397, UINT_MAX},
+ {364, 364, 364, 364, 397, UINT_MAX},
+ {295, 336, 358, 375, 391, UINT_MAX},
+ {295, 336, 358, 375, 391, UINT_MAX},
+};
+
+static int threshold_index __initdata;
+
+static void __init fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
+{
+ u32 reg;
+ int ate_ver;
+ int bit_minus1;
+ int bit_minus2;
+
+ reg = tegra30_fuse_readl(FUSE_SPEEDO_CALIB_0);
+
+ *speedo_lp = (reg & 0xFFFF) * 4;
+ *speedo_g = ((reg >> 16) & 0xFFFF) * 4;
+
+ ate_ver = tegra30_fuse_readl(FUSE_TEST_PROG_VER);
+ pr_debug("Tegra ATE prog ver %d.%d\n", ate_ver/10, ate_ver%10);
+
+ if (ate_ver >= 26) {
+ bit_minus1 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1);
+ bit_minus1 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1_R);
+ bit_minus2 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2);
+ bit_minus2 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2_R);
+ *speedo_lp |= (bit_minus1 << 1) | bit_minus2;
+
+ bit_minus1 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1);
+ bit_minus1 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1_R);
+ bit_minus2 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2);
+ bit_minus2 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2_R);
+ *speedo_g |= (bit_minus1 << 1) | bit_minus2;
+ } else {
+ *speedo_lp |= 0x3;
+ *speedo_g |= 0x3;
+ }
+}
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info)
+{
+ int package_id = tegra30_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
+
+ switch (sku_info->revision) {
+ case TEGRA_REVISION_A01:
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ threshold_index = THRESHOLD_INDEX_0;
+ break;
+ case TEGRA_REVISION_A02:
+ case TEGRA_REVISION_A03:
+ switch (sku_info->sku_id) {
+ case 0x87:
+ case 0x82:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_1;
+ break;
+ case 0x81:
+ switch (package_id) {
+ case 1:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_2;
+ break;
+ case 2:
+ sku_info->cpu_speedo_id = 4;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_7;
+ break;
+ default:
+ pr_err("Tegra Unknown pkg %d\n", package_id);
+ break;
+ }
+ break;
+ case 0x80:
+ switch (package_id) {
+ case 1:
+ sku_info->cpu_speedo_id = 5;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_8;
+ break;
+ case 2:
+ sku_info->cpu_speedo_id = 6;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_9;
+ break;
+ default:
+ pr_err("Tegra Unknown pkg %d\n", package_id);
+ break;
+ }
+ break;
+ case 0x83:
+ switch (package_id) {
+ case 1:
+ sku_info->cpu_speedo_id = 7;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_10;
+ break;
+ case 2:
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_3;
+ break;
+ default:
+ pr_err("Tegra Unknown pkg %d\n", package_id);
+ break;
+ }
+ break;
+ case 0x8F:
+ sku_info->cpu_speedo_id = 8;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_11;
+ break;
+ case 0x08:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_4;
+ break;
+ case 0x02:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_5;
+ break;
+ case 0x04:
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_6;
+ break;
+ case 0:
+ switch (package_id) {
+ case 1:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_2;
+ break;
+ case 2:
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_3;
+ break;
+ default:
+ pr_err("Tegra Unknown pkg %d\n", package_id);
+ break;
+ }
+ break;
+ default:
+ pr_warn("Tegra Unknown SKU %d\n", sku_info->sku_id);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ threshold_index = THRESHOLD_INDEX_0;
+ break;
+ }
+ break;
+ default:
+ pr_warn("Tegra Unknown chip rev %d\n", sku_info->revision);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ threshold_index = THRESHOLD_INDEX_0;
+ break;
+ }
+}
+
+void __init tegra30_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ u32 cpu_speedo_val;
+ u32 core_speedo_val;
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+
+
+ rev_sku_to_speedo_ids(sku_info);
+ fuse_speedo_calib(&cpu_speedo_val, &core_speedo_val);
+ pr_debug("Tegra CPU speedo value %u\n", cpu_speedo_val);
+ pr_debug("Tegra Core speedo value %u\n", core_speedo_val);
+
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++) {
+ if (cpu_speedo_val < cpu_process_speedos[threshold_index][i])
+ break;
+ }
+ sku_info->cpu_process_id = i - 1;
+
+ if (sku_info->cpu_process_id == -1) {
+ pr_warn("Tegra CPU speedo value %3d out of range",
+ cpu_speedo_val);
+ sku_info->cpu_process_id = 0;
+ sku_info->cpu_speedo_id = 1;
+ }
+
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++) {
+ if (core_speedo_val < core_process_speedos[threshold_index][i])
+ break;
+ }
+ sku_info->core_process_id = i - 1;
+
+ if (sku_info->core_process_id == -1) {
+ pr_warn("Tegra CORE speedo value %3d out of range",
+ core_speedo_val);
+ sku_info->core_process_id = 0;
+ sku_info->soc_speedo_id = 1;
+ }
+}
diff --git a/drivers/misc/fuse/tegra/tegra-apbmisc.c b/drivers/misc/fuse/tegra/tegra-apbmisc.c
new file mode 100644
index 0000000..43e5bd5
--- /dev/null
+++ b/drivers/misc/fuse/tegra/tegra-apbmisc.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define APBMISC_BASE 0x70000800
+#define APBMISC_SIZE 0x64
+#define FUSE_SKU_INFO 0x10
+
+int tegra_chip_id;
+
+static void __iomem *apbmisc_base;
+static void __iomem *strapping_base;
+
+u32 tegra_read_chipid(void)
+{
+ return readl_relaxed(apbmisc_base + 4);
+}
+
+u32 tegra_read_straps(void)
+{
+ if (strapping_base)
+ return readl_relaxed(strapping_base);
+ else
+ return 0;
+}
+
+static const struct of_device_id apbmisc_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-apbmisc", },
+ {},
+};
+
+void __init tegra_init_revision(void)
+{
+ u32 id, minor_rev;
+ int rev;
+
+ id = tegra_read_chipid();
+ minor_rev = (id >> 16) & 0xf;
+
+ switch (minor_rev) {
+ case 1:
+ rev = TEGRA_REVISION_A01;
+ break;
+ case 2:
+ rev = TEGRA_REVISION_A02;
+ break;
+ case 3:
+ if (tegra_chip_id == TEGRA20 &&
+ (tegra20_spare_fuse_early(18) ||
+ tegra20_spare_fuse_early(19)))
+ rev = TEGRA_REVISION_A03p;
+ else
+ rev = TEGRA_REVISION_A03;
+ break;
+ case 4:
+ rev = TEGRA_REVISION_A04;
+ break;
+ default:
+ rev = TEGRA_REVISION_UNKNOWN;
+ }
+
+ tegra_sku_info.revision = rev;
+
+ if (tegra_chip_id == TEGRA20)
+ tegra_sku_info.sku_id = tegra20_fuse_early(FUSE_SKU_INFO);
+ else
+ tegra_sku_info.sku_id = tegra30_fuse_readl(FUSE_SKU_INFO);
+}
+
+void __init tegra_init_apbmisc(void)
+{
+ struct device_node *np;
+ u32 id;
+
+ np = of_find_matching_node(NULL, apbmisc_match);
+ apbmisc_base = of_iomap(np, 0);
+ if (!apbmisc_base) {
+ pr_warn("ioremap tegra apbmisc failed. using %08x instead\n",
+ APBMISC_BASE);
+ apbmisc_base = ioremap(APBMISC_BASE, APBMISC_SIZE);
+ }
+
+ id = tegra_read_chipid();
+ tegra_chip_id = (id >> 8) & 0xff;
+
+ strapping_base = of_iomap(np, 1);
+ if (!strapping_base)
+ pr_err("ioremap tegra strapping_base failed\n");
+}
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index db93b77..5c33b16 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -22,6 +22,9 @@
#define TEGRA114 0x35
#define TEGRA124 0x40
+#define TEGRA_FUSE_SKU_CALIB_0 0xf0
+#define TEGRA30_FUSE_SATA_CALIB 0x124
+
#ifndef __ASSEMBLY__
enum tegra_revision {
@@ -34,12 +37,27 @@ enum tegra_revision {
TEGRA_REVISION_MAX,
};
+struct tegra_sku_info {
+ int sku_id;
+ int cpu_process_id;
+ int cpu_speedo_id;
+ int cpu_speedo_value;
+ int cpu_iddq_value;
+ int core_process_id;
+ int soc_speedo_id;
+ int gpu_speedo_id;
+ int gpu_process_id;
+ int gpu_speedo_value;
+ enum tegra_revision revision;
+};
+
u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
void tegra_init_fuse(void);
extern int tegra_chip_id;
extern enum tegra_revision tegra_revision;
+extern struct tegra_sku_info tegra_sku_info;
#if defined(CONFIG_TEGRA20_APB_DMA)
int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 3/6] misc: fuse: Add efuse driver for Tegra
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Randy Dunlap, Stephen Warren, Thierry Reding, Grant Likely,
Rob Herring, linux-doc, linux-tegra, linux-kernel, devicetree
Implement fuse driver for Tegra20, Tegra30, Tegra114 and Tegra124.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
Documentation/ABI/testing/sysfs-driver-tegra-fuse | 11 +
drivers/misc/fuse/Makefile | 1 +
drivers/misc/fuse/tegra/Makefile | 8 +
drivers/misc/fuse/tegra/fuse-tegra.c | 144 +++++++++++
drivers/misc/fuse/tegra/fuse-tegra20.c | 141 ++++++++++
drivers/misc/fuse/tegra/fuse-tegra30.c | 223 ++++++++++++++++
drivers/misc/fuse/tegra/fuse.h | 71 +++++
drivers/misc/fuse/tegra/speedo-tegra114.c | 109 ++++++++
drivers/misc/fuse/tegra/speedo-tegra124.c | 167 ++++++++++++
drivers/misc/fuse/tegra/speedo-tegra20.c | 109 ++++++++
drivers/misc/fuse/tegra/speedo-tegra30.c | 287 +++++++++++++++++++++
drivers/misc/fuse/tegra/tegra-apbmisc.c | 110 ++++++++
include/linux/tegra-soc.h | 18 ++
13 files changed, 1399 insertions(+), 0 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-driver-tegra-fuse
create mode 100644 drivers/misc/fuse/Makefile
create mode 100644 drivers/misc/fuse/tegra/Makefile
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra.c
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra20.c
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra30.c
create mode 100644 drivers/misc/fuse/tegra/fuse.h
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra114.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra124.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra20.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra30.c
create mode 100644 drivers/misc/fuse/tegra/tegra-apbmisc.c
diff --git a/Documentation/ABI/testing/sysfs-driver-tegra-fuse b/Documentation/ABI/testing/sysfs-driver-tegra-fuse
new file mode 100644
index 0000000..69f5af6
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-driver-tegra-fuse
@@ -0,0 +1,11 @@
+What: /sys/devices/*/<our-device>/fuse
+Date: February 2014
+Contact: Peter De Schrijver <pdeschrijver@nvidia.com>
+Description: read-only access to the efuses on Tegra20, Tegra30, Tegra114
+ and Tegra124 SoC's from NVIDIA. The efuses contain write once
+ data programmed at the factory. The data is layed out in 32bit
+ words in LSB first format. Each bit represents a single value
+ as decoded from the fuse registers. Bits order/assignment
+ exactly matches the HW registers, including any unused bits.
+Users: any user space application which wants to read the efuses on
+ Tegra SoC's
diff --git a/drivers/misc/fuse/Makefile b/drivers/misc/fuse/Makefile
new file mode 100644
index 0000000..0679c4f
--- /dev/null
+++ b/drivers/misc/fuse/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_ARCH_TEGRA) += tegra/
diff --git a/drivers/misc/fuse/tegra/Makefile b/drivers/misc/fuse/tegra/Makefile
new file mode 100644
index 0000000..3af357d
--- /dev/null
+++ b/drivers/misc/fuse/tegra/Makefile
@@ -0,0 +1,8 @@
+obj-y += fuse-tegra.o
+obj-y += fuse-tegra30.o
+obj-y += tegra-apbmisc.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += fuse-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += speedo-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += speedo-tegra30.o
+obj-$(CONFIG_ARCH_TEGRA_114_SOC) += speedo-tegra114.o
+obj-$(CONFIG_ARCH_TEGRA_124_SOC) += speedo-tegra124.o
diff --git a/drivers/misc/fuse/tegra/fuse-tegra.c b/drivers/misc/fuse/tegra/fuse-tegra.c
new file mode 100644
index 0000000..3fa6f74
--- /dev/null
+++ b/drivers/misc/fuse/tegra/fuse-tegra.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/kobject.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+static u32 (*fuse_readl)(const unsigned int offset);
+static int fuse_size;
+struct tegra_sku_info tegra_sku_info;
+
+static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
+ [TEGRA_REVISION_UNKNOWN] = "unknown",
+ [TEGRA_REVISION_A01] = "A01",
+ [TEGRA_REVISION_A02] = "A02",
+ [TEGRA_REVISION_A03] = "A03",
+ [TEGRA_REVISION_A03p] = "A03 prime",
+ [TEGRA_REVISION_A04] = "A04",
+};
+
+static u8 fuse_readb(const unsigned int offset)
+{
+ u32 val;
+
+ val = fuse_readl(round_down(offset, 4));
+ val >>= (offset % 4) * 8;
+ val &= 0xff;
+
+ return val;
+}
+
+static ssize_t fuse_read(struct file *fd, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t pos, size_t size)
+{
+ int i;
+
+ if (pos < 0 || pos >= fuse_size)
+ return 0;
+
+ if (size > fuse_size - pos)
+ size = fuse_size - pos;
+
+ for (i = 0; i < size; i++)
+ buf[i] = fuse_readb(pos + i);
+
+ return i;
+}
+
+static struct bin_attribute fuse_bin_attr = {
+ .attr = { .name = "fuse", .mode = S_IRUGO, },
+ .read = fuse_read,
+};
+
+static const struct of_device_id car_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-car", },
+ { .compatible = "nvidia,tegra30-car", },
+ { .compatible = "nvidia,tegra114-car", },
+ { .compatible = "nvidia,tegra124-car", },
+ {},
+};
+
+static void tegra_enable_fuse_clk(void __iomem *base)
+{
+ u32 reg;
+
+ reg = readl_relaxed(base + 0x48);
+ reg |= 1 << 28;
+ writel(reg, base + 0x48);
+
+ /*
+ * Enable FUSE clock. This needs to be hardcoded because the clock
+ * subsystem is not active during early boot.
+ */
+ reg = readl(base + 0x14);
+ reg |= 1 << 7;
+ writel(reg, base + 0x14);
+}
+
+int tegra_fuse_create_sysfs(struct device *dev, int size,
+ u32 (*readl)(const unsigned int offset))
+{
+ if (fuse_size)
+ return -ENODEV;
+
+ fuse_bin_attr.size = size;
+ fuse_bin_attr.read = fuse_read;
+
+ fuse_size = size;
+ fuse_readl = readl;
+
+ return device_create_bin_file(dev, &fuse_bin_attr);
+}
+
+void __init tegra_init_fuse(void)
+{
+ struct device_node *np;
+ void __iomem *car_base;
+
+ tegra_init_apbmisc();
+
+ np = of_find_matching_node(NULL, car_match);
+ car_base = of_iomap(np, 0);
+ if (car_base) {
+ tegra_enable_fuse_clk(car_base);
+ iounmap(car_base);
+ } else {
+ pr_err("Could not enable fuse clk. ioremap tegra car failed.\n");
+ return;
+ }
+
+ if (tegra_chip_id == TEGRA20)
+ tegra20_init_fuse_early();
+ else
+ tegra30_init_fuse_early();
+
+ pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
+ tegra_revision_name[tegra_sku_info.revision],
+ tegra_sku_info.sku_id, tegra_sku_info.cpu_process_id,
+ tegra_sku_info.core_process_id);
+ pr_debug("Tegra CPU Speedo ID %d, Soc Speedo ID %d\n",
+ tegra_sku_info.cpu_speedo_id, tegra_sku_info.soc_speedo_id);
+}
diff --git a/drivers/misc/fuse/tegra/fuse-tegra20.c b/drivers/misc/fuse/tegra/fuse-tegra20.c
new file mode 100644
index 0000000..09f91bf
--- /dev/null
+++ b/drivers/misc/fuse/tegra/fuse-tegra20.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Based on drivers/misc/eeprom/sunxi_sid.c
+ */
+
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/kobject.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define FUSE_BEGIN 0x100
+#define FUSE_SIZE 0x1f8
+#define FUSE_UID_LOW 0x08
+#define FUSE_UID_HIGH 0x0c
+
+static phys_addr_t fuse_phys;
+static struct clk *fuse_clk;
+static void __iomem __initdata *fuse_base;
+
+static u32 tegra20_fuse_readl(const unsigned int offset)
+{
+ int ret;
+ u32 val;
+
+ clk_prepare_enable(fuse_clk);
+
+ ret = tegra_apb_readl_using_dma(fuse_phys + FUSE_BEGIN + offset, &val);
+
+ clk_disable_unprepare(fuse_clk);
+
+ return (ret < 0) ? 0 : val;
+}
+
+static const struct of_device_id tegra20_fuse_of_match[] = {
+ { .compatible = "nvidia,tegra20-efuse" },
+ {},
+};
+
+static int tegra20_fuse_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ fuse_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fuse_clk)) {
+ dev_err(&pdev->dev, "missing clock");
+ return PTR_ERR(fuse_clk);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+ fuse_phys = res->start;
+
+ if (tegra_fuse_create_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl))
+ return -ENODEV;
+
+ dev_dbg(&pdev->dev, "loaded\n");
+
+ return 0;
+}
+
+static struct platform_driver tegra20_fuse_driver = {
+ .probe = tegra20_fuse_probe,
+ .driver = {
+ .name = "tegra20_fuse",
+ .owner = THIS_MODULE,
+ .of_match_table = tegra20_fuse_of_match,
+ }
+};
+
+static int __init tegra20_fuse_init(void)
+{
+ return platform_driver_register(&tegra20_fuse_driver);
+}
+postcore_initcall(tegra20_fuse_init);
+
+/* Early boot code. This code is called before the devices are created */
+
+u32 __init tegra20_fuse_early(const unsigned int offset)
+{
+ return readl_relaxed(fuse_base + FUSE_BEGIN + offset);
+}
+
+bool __init tegra20_spare_fuse_early(int spare_bit)
+{
+ u32 offset = spare_bit * 4;
+ bool value;
+
+ value = tegra20_fuse_early(offset + 0x100);
+
+ return value;
+}
+
+static void __init tegra20_fuse_add_randomness(void)
+{
+ u32 randomness[7];
+
+ randomness[0] = tegra_sku_info.sku_id;
+ randomness[1] = tegra_read_straps();
+ randomness[2] = tegra_read_chipid();
+ randomness[3] = tegra_sku_info.cpu_process_id << 16;
+ randomness[3] |= tegra_sku_info.core_process_id;
+ randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
+ randomness[4] |= tegra_sku_info.soc_speedo_id;
+ randomness[5] = tegra20_fuse_early(FUSE_UID_LOW);
+ randomness[6] = tegra20_fuse_early(FUSE_UID_HIGH);
+
+ add_device_randomness(randomness, sizeof(randomness));
+}
+
+void __init tegra20_init_fuse_early(void)
+{
+ fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE);
+
+ tegra_init_revision();
+ tegra20_init_speedo_data(&tegra_sku_info);
+ tegra20_fuse_add_randomness();
+
+ iounmap(fuse_base);
+}
diff --git a/drivers/misc/fuse/tegra/fuse-tegra30.c b/drivers/misc/fuse/tegra/fuse-tegra30.c
new file mode 100644
index 0000000..8aef5d0
--- /dev/null
+++ b/drivers/misc/fuse/tegra/fuse-tegra30.c
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define FUSE_BEGIN 0x100
+
+/* Tegra30 and later */
+#define FUSE_VENDOR_CODE 0x100
+#define FUSE_FAB_CODE 0x104
+#define FUSE_LOT_CODE_0 0x108
+#define FUSE_LOT_CODE_1 0x10c
+#define FUSE_WAFER_ID 0x110
+#define FUSE_X_COORDINATE 0x114
+#define FUSE_Y_COORDINATE 0x118
+
+#define FUSE_HAS_REVISION_INFO BIT(0)
+
+enum speedo_idx {
+ SPEEDO_TEGRA30 = 0,
+ SPEEDO_TEGRA114,
+ SPEEDO_TEGRA124,
+};
+
+struct tegra_fuse_info {
+ int size;
+ int spare_bit;
+ enum speedo_idx speedo_idx;
+};
+
+static void __iomem *fuse_base;
+static struct clk *fuse_clk;
+static struct tegra_fuse_info *fuse_info;
+
+u32 tegra30_fuse_readl(const unsigned int offset)
+{
+ u32 val;
+
+ /*
+ * early in the boot, the fuse clock will be enabled by
+ * tegra_init_fuse()
+ */
+
+ if (fuse_clk)
+ clk_prepare_enable(fuse_clk);
+
+ val = readl_relaxed(fuse_base + FUSE_BEGIN + offset);
+
+ if (fuse_clk)
+ clk_disable_unprepare(fuse_clk);
+
+ return val;
+}
+
+static struct tegra_fuse_info tegra30_info = {
+ .size = 0x2a4,
+ .spare_bit = 0x144,
+ .speedo_idx = SPEEDO_TEGRA30,
+};
+
+static struct tegra_fuse_info tegra114_info = {
+ .size = 0x2a0,
+ .speedo_idx = SPEEDO_TEGRA114,
+};
+
+static struct tegra_fuse_info tegra124_info = {
+ .size = 0x300,
+ .speedo_idx = SPEEDO_TEGRA124,
+};
+
+static const struct of_device_id tegra30_fuse_of_match[] = {
+ { .compatible = "nvidia,tegra30-efuse", .data = &tegra30_info },
+ { .compatible = "nvidia,tegra114-efuse", .data = &tegra114_info },
+ { .compatible = "nvidia,tegra124-efuse", .data = &tegra124_info },
+ {},
+};
+
+static int tegra30_fuse_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *of_dev_id;
+
+ of_dev_id = of_match_device(tegra30_fuse_of_match, &pdev->dev);
+ if (!of_dev_id)
+ return -ENODEV;
+
+ fuse_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fuse_clk)) {
+ dev_err(&pdev->dev, "missing clock");
+ return PTR_ERR(fuse_clk);
+ }
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (tegra_fuse_create_sysfs(&pdev->dev, fuse_info->size,
+ tegra30_fuse_readl))
+ return -ENODEV;
+
+ dev_dbg(&pdev->dev, "loaded\n");
+
+ return 0;
+}
+
+static struct platform_driver tegra30_fuse_driver = {
+ .probe = tegra30_fuse_probe,
+ .driver = {
+ .name = "tegra_fuse",
+ .owner = THIS_MODULE,
+ .of_match_table = tegra30_fuse_of_match,
+ }
+};
+
+static int __init tegra30_fuse_init(void)
+{
+ return platform_driver_register(&tegra30_fuse_driver);
+}
+postcore_initcall(tegra30_fuse_init);
+
+/* Early boot code. This code is called before the devices are created */
+
+typedef void (*speedo_f)(struct tegra_sku_info *sku_info);
+
+static speedo_f __initdata speedo_tbl[] = {
+ [SPEEDO_TEGRA30] = tegra30_init_speedo_data,
+ [SPEEDO_TEGRA114] = tegra114_init_speedo_data,
+ [SPEEDO_TEGRA124] = tegra124_init_speedo_data,
+};
+
+static void __init tegra30_fuse_add_randomness(void)
+{
+ u32 randomness[12];
+
+ randomness[0] = tegra_sku_info.sku_id;
+ randomness[1] = tegra_read_straps();
+ randomness[2] = tegra_read_chipid();
+ randomness[3] = tegra_sku_info.cpu_process_id << 16;
+ randomness[3] |= tegra_sku_info.core_process_id;
+ randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
+ randomness[4] |= tegra_sku_info.soc_speedo_id;
+ randomness[5] = tegra30_fuse_readl(FUSE_VENDOR_CODE);
+ randomness[6] = tegra30_fuse_readl(FUSE_FAB_CODE);
+ randomness[7] = tegra30_fuse_readl(FUSE_LOT_CODE_0);
+ randomness[8] = tegra30_fuse_readl(FUSE_LOT_CODE_1);
+ randomness[9] = tegra30_fuse_readl(FUSE_WAFER_ID);
+ randomness[10] = tegra30_fuse_readl(FUSE_X_COORDINATE);
+ randomness[11] = tegra30_fuse_readl(FUSE_Y_COORDINATE);
+
+ add_device_randomness(randomness, sizeof(randomness));
+}
+
+static void __init legacy_fuse_init(void)
+{
+ switch (tegra_chip_id) {
+ case TEGRA30:
+ fuse_info = &tegra30_info;
+ break;
+ case TEGRA114:
+ fuse_info = &tegra114_info;
+ break;
+ case TEGRA124:
+ fuse_info = &tegra124_info;
+ break;
+ default:
+ return;
+ }
+
+ fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE);
+}
+
+bool __init tegra30_spare_fuse(int spare_bit)
+{
+ u32 offset = fuse_info->spare_bit + spare_bit * 4;
+
+ return tegra30_fuse_readl(offset) & 1;
+}
+
+void __init tegra30_init_fuse_early(void)
+{
+ struct device_node *np;
+ const struct of_device_id *of_match;
+
+ np = of_find_matching_node_and_match(NULL, tegra30_fuse_of_match,
+ &of_match);
+ if (np) {
+ fuse_base = of_iomap(np, 0);
+ fuse_info = (struct tegra_fuse_info *)of_match->data;
+ } else
+ legacy_fuse_init();
+
+ if (!fuse_base) {
+ pr_warn("fuse DT node missing and unknown chip id: 0x%02x\n",
+ tegra_chip_id);
+ return;
+ }
+
+ tegra_init_revision();
+ speedo_tbl[fuse_info->speedo_idx](&tegra_sku_info);
+ tegra30_fuse_add_randomness();
+}
diff --git a/drivers/misc/fuse/tegra/fuse.h b/drivers/misc/fuse/tegra/fuse.h
new file mode 100644
index 0000000..b344277
--- /dev/null
+++ b/drivers/misc/fuse/tegra/fuse.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author:
+ * Colin Cross <ccross@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __DRIVERS_MISC_TEGRA_FUSE_H
+#define __DRIVERS_MISC_TEGRA_FUSE_H
+
+#define TEGRA_FUSE_BASE 0x7000f800
+#define TEGRA_FUSE_SIZE 0x400
+
+int tegra_fuse_create_sysfs(struct device *dev, int size,
+ u32 (*readl)(const unsigned int offset));
+
+bool tegra30_spare_fuse(int bit);
+u32 tegra30_fuse_readl(const unsigned int offset);
+void tegra30_init_fuse_early(void);
+void tegra_init_revision(void);
+void tegra_init_apbmisc(void);
+
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+void tegra20_init_speedo_data(struct tegra_sku_info *sku_info);
+bool tegra20_spare_fuse_early(int spare_bit);
+void tegra20_init_fuse_early(void);
+u32 tegra20_fuse_early(const unsigned int offset);
+#else
+static inline void tegra20_init_speedo_data(struct tegra_sku_info *sku_info) {}
+static inline bool tegra20_spare_fuse_early(int spare_bit, void *fuse_base)
+{
+ return false;
+}
+static inline void tegra20_init_fuse_early(void);
+static inline tegra20_fuse_early(const unsigned int offset);
+{
+ return 0;
+}
+#endif
+
+
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+void tegra30_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra30_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+void tegra114_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra114_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_124_SOC
+void tegra124_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra124_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#endif
diff --git a/drivers/misc/fuse/tegra/speedo-tegra114.c b/drivers/misc/fuse/tegra/speedo-tegra114.c
new file mode 100644
index 0000000..98d6cde
--- /dev/null
+++ b/drivers/misc/fuse/tegra/speedo-tegra114.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CORE_PROCESS_CORNERS 2
+#define CPU_PROCESS_CORNERS 2
+
+enum {
+ THRESHOLD_INDEX_0,
+ THRESHOLD_INDEX_1,
+ THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
+ {1123, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+ {1695, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+ int *threshold)
+{
+ u32 tmp;
+ u32 sku = sku_info->sku_id;
+ enum tegra_revision rev = sku_info->revision;
+
+ switch (sku) {
+ case 0x00:
+ case 0x10:
+ case 0x05:
+ case 0x06:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 0;
+ *threshold = THRESHOLD_INDEX_0;
+ break;
+
+ case 0x03:
+ case 0x04:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 1;
+ *threshold = THRESHOLD_INDEX_1;
+ break;
+
+ default:
+ pr_err("Tegra Unknown SKU %d\n", sku);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ *threshold = THRESHOLD_INDEX_0;
+ break;
+ }
+
+ if (rev == TEGRA_REVISION_A01) {
+ tmp = tegra30_fuse_readl(0x270) << 1;
+ tmp |= tegra30_fuse_readl(0x26c);
+ if (!tmp)
+ sku_info->cpu_speedo_id = 0;
+ }
+}
+
+void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ u32 cpu_speedo_val;
+ u32 core_speedo_val;
+ int threshold;
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+
+ rev_sku_to_speedo_ids(sku_info, &threshold);
+
+ cpu_speedo_val = tegra30_fuse_readl(0x12c) + 1024;
+ core_speedo_val = tegra30_fuse_readl(0x134);
+
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++)
+ if (cpu_speedo_val < cpu_process_speedos[threshold][i])
+ break;
+ sku_info->cpu_process_id = i;
+
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++)
+ if (core_speedo_val < core_process_speedos[threshold][i])
+ break;
+ sku_info->core_process_id = i;
+}
diff --git a/drivers/misc/fuse/tegra/speedo-tegra124.c b/drivers/misc/fuse/tegra/speedo-tegra124.c
new file mode 100644
index 0000000..a15dd53
--- /dev/null
+++ b/drivers/misc/fuse/tegra/speedo-tegra124.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CPU_PROCESS_CORNERS 2
+#define GPU_PROCESS_CORNERS 2
+#define CORE_PROCESS_CORNERS 2
+
+#define FUSE_CPU_SPEEDO_0 0x14
+#define FUSE_CPU_SPEEDO_1 0x2c
+#define FUSE_CPU_SPEEDO_2 0x30
+#define FUSE_SOC_SPEEDO_0 0x34
+#define FUSE_SOC_SPEEDO_1 0x38
+#define FUSE_SOC_SPEEDO_2 0x3c
+#define FUSE_CPU_IDDQ 0x18
+#define FUSE_SOC_IDDQ 0x40
+#define FUSE_GPU_IDDQ 0x128
+#define FUSE_FT_REV 0x28
+
+enum {
+ THRESHOLD_INDEX_0,
+ THRESHOLD_INDEX_1,
+ THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+ {2190, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
+ {1965, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
+ {2101, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+ int *threshold)
+{
+ int sku = sku_info->sku_id;
+
+ /* Assign to default */
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ sku_info->gpu_speedo_id = 0;
+ *threshold = THRESHOLD_INDEX_0;
+
+ switch (sku) {
+ case 0x00: /* Eng sku */
+ case 0x0F:
+ case 0x23:
+ /* Using the default */
+ break;
+ case 0x83:
+ sku_info->cpu_speedo_id = 2;
+ break;
+
+ case 0x1F:
+ case 0x87:
+ case 0x27:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 0;
+ sku_info->gpu_speedo_id = 1;
+ *threshold = THRESHOLD_INDEX_0;
+ break;
+ case 0x81:
+ case 0x21:
+ case 0x07:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
+ sku_info->gpu_speedo_id = 1;
+ *threshold = THRESHOLD_INDEX_1;
+ break;
+ case 0x49:
+ case 0x4A:
+ case 0x48:
+ sku_info->cpu_speedo_id = 4;
+ sku_info->soc_speedo_id = 2;
+ sku_info->gpu_speedo_id = 3;
+ *threshold = THRESHOLD_INDEX_1;
+ break;
+ default:
+ pr_err("Tegra Unknown SKU %d\n", sku);
+ /* Using the default for the error case */
+ break;
+ }
+}
+
+void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ int i, threshold, cpu_speedo_0_value, soc_speedo_0_value;
+ int cpu_iddq_value, gpu_iddq_value, soc_iddq_value;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+
+ cpu_speedo_0_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_0);
+
+ /* GPU Speedo is stored in CPU_SPEEDO_2 */
+ sku_info->gpu_speedo_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_2);
+
+ soc_speedo_0_value = tegra30_fuse_readl(FUSE_SOC_SPEEDO_0);
+
+ cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ);
+ soc_iddq_value = tegra30_fuse_readl(FUSE_SOC_IDDQ);
+ gpu_iddq_value = tegra30_fuse_readl(FUSE_GPU_IDDQ);
+
+ sku_info->cpu_speedo_value = cpu_speedo_0_value;
+
+ if (sku_info->cpu_speedo_value == 0) {
+ pr_warn("Tegra Warning: Speedo value not fused.\n");
+ WARN_ON(1);
+ return;
+ }
+
+ rev_sku_to_speedo_ids(sku_info, &threshold);
+
+ sku_info->cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ);
+
+ for (i = 0; i < GPU_PROCESS_CORNERS; i++)
+ if (sku_info->gpu_speedo_value <
+ gpu_process_speedos[threshold][i])
+ break;
+ sku_info->gpu_process_id = i;
+
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++)
+ if (sku_info->cpu_speedo_value <
+ cpu_process_speedos[threshold][i])
+ break;
+ sku_info->cpu_process_id = i;
+
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++)
+ if (soc_speedo_0_value <
+ core_process_speedos[threshold][i])
+ break;
+ sku_info->core_process_id = i;
+
+ pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
+ sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
+}
diff --git a/drivers/misc/fuse/tegra/speedo-tegra20.c b/drivers/misc/fuse/tegra/speedo-tegra20.c
new file mode 100644
index 0000000..c951fa4
--- /dev/null
+++ b/drivers/misc/fuse/tegra/speedo-tegra20.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2012-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CPU_SPEEDO_LSBIT 20
+#define CPU_SPEEDO_MSBIT 29
+#define CPU_SPEEDO_REDUND_LSBIT 30
+#define CPU_SPEEDO_REDUND_MSBIT 39
+#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT)
+
+#define CORE_SPEEDO_LSBIT 40
+#define CORE_SPEEDO_MSBIT 47
+#define CORE_SPEEDO_REDUND_LSBIT 48
+#define CORE_SPEEDO_REDUND_MSBIT 55
+#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT)
+
+#define SPEEDO_MULT 4
+
+#define PROCESS_CORNERS_NUM 4
+
+#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2)
+#define SPEEDO_ID_SELECT_1(sku) \
+ (((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \
+ ((sku) != 27) && ((sku) != 28))
+
+enum {
+ SPEEDO_ID_0,
+ SPEEDO_ID_1,
+ SPEEDO_ID_2,
+ SPEEDO_ID_COUNT,
+};
+
+static const u32 __initconst cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
+ {315, 366, 420, UINT_MAX},
+ {303, 368, 419, UINT_MAX},
+ {316, 331, 383, UINT_MAX},
+};
+
+static const u32 __initconst core_process_speedos[][PROCESS_CORNERS_NUM] = {
+ {165, 195, 224, UINT_MAX},
+ {165, 195, 224, UINT_MAX},
+ {165, 195, 224, UINT_MAX},
+};
+
+void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ u32 reg;
+ u32 val;
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT);
+
+ if (SPEEDO_ID_SELECT_0(sku_info->revision))
+ sku_info->soc_speedo_id = SPEEDO_ID_0;
+ else if (SPEEDO_ID_SELECT_1(sku_info->sku_id))
+ sku_info->soc_speedo_id = SPEEDO_ID_1;
+ else
+ sku_info->soc_speedo_id = SPEEDO_ID_2;
+
+ val = 0;
+ for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
+ reg = tegra20_spare_fuse_early(i) |
+ tegra20_spare_fuse_early(i + CPU_SPEEDO_REDUND_OFFS);
+ val = (val << 1) | (reg & 0x1);
+ }
+ val = val * SPEEDO_MULT;
+ pr_debug("Tegra CPU speedo value %u\n", val);
+
+ for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
+ if (val <= cpu_process_speedos[sku_info->soc_speedo_id][i])
+ break;
+ }
+ sku_info->cpu_process_id = i;
+
+ val = 0;
+ for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) {
+ reg = tegra20_spare_fuse_early(i) |
+ tegra20_spare_fuse_early(i + CORE_SPEEDO_REDUND_OFFS);
+ val = (val << 1) | (reg & 0x1);
+ }
+ val = val * SPEEDO_MULT;
+ pr_debug("Core speedo value %u\n", val);
+
+ for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
+ if (val <= core_process_speedos[sku_info->soc_speedo_id][i])
+ break;
+ }
+ sku_info->core_process_id = i;
+}
diff --git a/drivers/misc/fuse/tegra/speedo-tegra30.c b/drivers/misc/fuse/tegra/speedo-tegra30.c
new file mode 100644
index 0000000..1a85ad8
--- /dev/null
+++ b/drivers/misc/fuse/tegra/speedo-tegra30.c
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 2012-2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CORE_PROCESS_CORNERS 1
+#define CPU_PROCESS_CORNERS 6
+
+#define FUSE_SPEEDO_CALIB_0 0x14
+#define FUSE_PACKAGE_INFO 0XFC
+#define FUSE_TEST_PROG_VER 0X28
+
+#define G_SPEEDO_BIT_MINUS1 58
+#define G_SPEEDO_BIT_MINUS1_R 59
+#define G_SPEEDO_BIT_MINUS2 60
+#define G_SPEEDO_BIT_MINUS2_R 61
+#define LP_SPEEDO_BIT_MINUS1 62
+#define LP_SPEEDO_BIT_MINUS1_R 63
+#define LP_SPEEDO_BIT_MINUS2 64
+#define LP_SPEEDO_BIT_MINUS2_R 65
+
+enum {
+ THRESHOLD_INDEX_0,
+ THRESHOLD_INDEX_1,
+ THRESHOLD_INDEX_2,
+ THRESHOLD_INDEX_3,
+ THRESHOLD_INDEX_4,
+ THRESHOLD_INDEX_5,
+ THRESHOLD_INDEX_6,
+ THRESHOLD_INDEX_7,
+ THRESHOLD_INDEX_8,
+ THRESHOLD_INDEX_9,
+ THRESHOLD_INDEX_10,
+ THRESHOLD_INDEX_11,
+ THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
+ {180},
+ {170},
+ {195},
+ {180},
+ {168},
+ {192},
+ {180},
+ {170},
+ {195},
+ {180},
+ {180},
+ {180},
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+ {306, 338, 360, 376, UINT_MAX},
+ {295, 336, 358, 375, UINT_MAX},
+ {325, 325, 358, 375, UINT_MAX},
+ {325, 325, 358, 375, UINT_MAX},
+ {292, 324, 348, 364, UINT_MAX},
+ {324, 324, 348, 364, UINT_MAX},
+ {324, 324, 348, 364, UINT_MAX},
+ {295, 336, 358, 375, UINT_MAX},
+ {358, 358, 358, 358, 397, UINT_MAX},
+ {364, 364, 364, 364, 397, UINT_MAX},
+ {295, 336, 358, 375, 391, UINT_MAX},
+ {295, 336, 358, 375, 391, UINT_MAX},
+};
+
+static int threshold_index __initdata;
+
+static void __init fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
+{
+ u32 reg;
+ int ate_ver;
+ int bit_minus1;
+ int bit_minus2;
+
+ reg = tegra30_fuse_readl(FUSE_SPEEDO_CALIB_0);
+
+ *speedo_lp = (reg & 0xFFFF) * 4;
+ *speedo_g = ((reg >> 16) & 0xFFFF) * 4;
+
+ ate_ver = tegra30_fuse_readl(FUSE_TEST_PROG_VER);
+ pr_debug("Tegra ATE prog ver %d.%d\n", ate_ver/10, ate_ver%10);
+
+ if (ate_ver >= 26) {
+ bit_minus1 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1);
+ bit_minus1 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1_R);
+ bit_minus2 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2);
+ bit_minus2 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2_R);
+ *speedo_lp |= (bit_minus1 << 1) | bit_minus2;
+
+ bit_minus1 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1);
+ bit_minus1 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1_R);
+ bit_minus2 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2);
+ bit_minus2 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2_R);
+ *speedo_g |= (bit_minus1 << 1) | bit_minus2;
+ } else {
+ *speedo_lp |= 0x3;
+ *speedo_g |= 0x3;
+ }
+}
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info)
+{
+ int package_id = tegra30_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
+
+ switch (sku_info->revision) {
+ case TEGRA_REVISION_A01:
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ threshold_index = THRESHOLD_INDEX_0;
+ break;
+ case TEGRA_REVISION_A02:
+ case TEGRA_REVISION_A03:
+ switch (sku_info->sku_id) {
+ case 0x87:
+ case 0x82:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_1;
+ break;
+ case 0x81:
+ switch (package_id) {
+ case 1:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_2;
+ break;
+ case 2:
+ sku_info->cpu_speedo_id = 4;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_7;
+ break;
+ default:
+ pr_err("Tegra Unknown pkg %d\n", package_id);
+ break;
+ }
+ break;
+ case 0x80:
+ switch (package_id) {
+ case 1:
+ sku_info->cpu_speedo_id = 5;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_8;
+ break;
+ case 2:
+ sku_info->cpu_speedo_id = 6;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_9;
+ break;
+ default:
+ pr_err("Tegra Unknown pkg %d\n", package_id);
+ break;
+ }
+ break;
+ case 0x83:
+ switch (package_id) {
+ case 1:
+ sku_info->cpu_speedo_id = 7;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_10;
+ break;
+ case 2:
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_3;
+ break;
+ default:
+ pr_err("Tegra Unknown pkg %d\n", package_id);
+ break;
+ }
+ break;
+ case 0x8F:
+ sku_info->cpu_speedo_id = 8;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_11;
+ break;
+ case 0x08:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_4;
+ break;
+ case 0x02:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_5;
+ break;
+ case 0x04:
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_6;
+ break;
+ case 0:
+ switch (package_id) {
+ case 1:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_2;
+ break;
+ case 2:
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_3;
+ break;
+ default:
+ pr_err("Tegra Unknown pkg %d\n", package_id);
+ break;
+ }
+ break;
+ default:
+ pr_warn("Tegra Unknown SKU %d\n", sku_info->sku_id);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ threshold_index = THRESHOLD_INDEX_0;
+ break;
+ }
+ break;
+ default:
+ pr_warn("Tegra Unknown chip rev %d\n", sku_info->revision);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ threshold_index = THRESHOLD_INDEX_0;
+ break;
+ }
+}
+
+void __init tegra30_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ u32 cpu_speedo_val;
+ u32 core_speedo_val;
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+
+
+ rev_sku_to_speedo_ids(sku_info);
+ fuse_speedo_calib(&cpu_speedo_val, &core_speedo_val);
+ pr_debug("Tegra CPU speedo value %u\n", cpu_speedo_val);
+ pr_debug("Tegra Core speedo value %u\n", core_speedo_val);
+
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++) {
+ if (cpu_speedo_val < cpu_process_speedos[threshold_index][i])
+ break;
+ }
+ sku_info->cpu_process_id = i - 1;
+
+ if (sku_info->cpu_process_id == -1) {
+ pr_warn("Tegra CPU speedo value %3d out of range",
+ cpu_speedo_val);
+ sku_info->cpu_process_id = 0;
+ sku_info->cpu_speedo_id = 1;
+ }
+
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++) {
+ if (core_speedo_val < core_process_speedos[threshold_index][i])
+ break;
+ }
+ sku_info->core_process_id = i - 1;
+
+ if (sku_info->core_process_id == -1) {
+ pr_warn("Tegra CORE speedo value %3d out of range",
+ core_speedo_val);
+ sku_info->core_process_id = 0;
+ sku_info->soc_speedo_id = 1;
+ }
+}
diff --git a/drivers/misc/fuse/tegra/tegra-apbmisc.c b/drivers/misc/fuse/tegra/tegra-apbmisc.c
new file mode 100644
index 0000000..43e5bd5
--- /dev/null
+++ b/drivers/misc/fuse/tegra/tegra-apbmisc.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define APBMISC_BASE 0x70000800
+#define APBMISC_SIZE 0x64
+#define FUSE_SKU_INFO 0x10
+
+int tegra_chip_id;
+
+static void __iomem *apbmisc_base;
+static void __iomem *strapping_base;
+
+u32 tegra_read_chipid(void)
+{
+ return readl_relaxed(apbmisc_base + 4);
+}
+
+u32 tegra_read_straps(void)
+{
+ if (strapping_base)
+ return readl_relaxed(strapping_base);
+ else
+ return 0;
+}
+
+static const struct of_device_id apbmisc_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-apbmisc", },
+ {},
+};
+
+void __init tegra_init_revision(void)
+{
+ u32 id, minor_rev;
+ int rev;
+
+ id = tegra_read_chipid();
+ minor_rev = (id >> 16) & 0xf;
+
+ switch (minor_rev) {
+ case 1:
+ rev = TEGRA_REVISION_A01;
+ break;
+ case 2:
+ rev = TEGRA_REVISION_A02;
+ break;
+ case 3:
+ if (tegra_chip_id == TEGRA20 &&
+ (tegra20_spare_fuse_early(18) ||
+ tegra20_spare_fuse_early(19)))
+ rev = TEGRA_REVISION_A03p;
+ else
+ rev = TEGRA_REVISION_A03;
+ break;
+ case 4:
+ rev = TEGRA_REVISION_A04;
+ break;
+ default:
+ rev = TEGRA_REVISION_UNKNOWN;
+ }
+
+ tegra_sku_info.revision = rev;
+
+ if (tegra_chip_id == TEGRA20)
+ tegra_sku_info.sku_id = tegra20_fuse_early(FUSE_SKU_INFO);
+ else
+ tegra_sku_info.sku_id = tegra30_fuse_readl(FUSE_SKU_INFO);
+}
+
+void __init tegra_init_apbmisc(void)
+{
+ struct device_node *np;
+ u32 id;
+
+ np = of_find_matching_node(NULL, apbmisc_match);
+ apbmisc_base = of_iomap(np, 0);
+ if (!apbmisc_base) {
+ pr_warn("ioremap tegra apbmisc failed. using %08x instead\n",
+ APBMISC_BASE);
+ apbmisc_base = ioremap(APBMISC_BASE, APBMISC_SIZE);
+ }
+
+ id = tegra_read_chipid();
+ tegra_chip_id = (id >> 8) & 0xff;
+
+ strapping_base = of_iomap(np, 1);
+ if (!strapping_base)
+ pr_err("ioremap tegra strapping_base failed\n");
+}
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index db93b77..5c33b16 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -22,6 +22,9 @@
#define TEGRA114 0x35
#define TEGRA124 0x40
+#define TEGRA_FUSE_SKU_CALIB_0 0xf0
+#define TEGRA30_FUSE_SATA_CALIB 0x124
+
#ifndef __ASSEMBLY__
enum tegra_revision {
@@ -34,12 +37,27 @@ enum tegra_revision {
TEGRA_REVISION_MAX,
};
+struct tegra_sku_info {
+ int sku_id;
+ int cpu_process_id;
+ int cpu_speedo_id;
+ int cpu_speedo_value;
+ int cpu_iddq_value;
+ int core_process_id;
+ int soc_speedo_id;
+ int gpu_speedo_id;
+ int gpu_process_id;
+ int gpu_speedo_value;
+ enum tegra_revision revision;
+};
+
u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
void tegra_init_fuse(void);
extern int tegra_chip_id;
extern enum tegra_revision tegra_revision;
+extern struct tegra_sku_info tegra_sku_info;
#if defined(CONFIG_TEGRA20_APB_DMA)
int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v8 4/6] ARM: tegra: Add efuse and apbmisc bindings
2014-06-12 15:36 ` Peter De Schrijver
(?)
@ 2014-06-12 15:36 ` Peter De Schrijver
-1 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Rob Herring, Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala,
Randy Dunlap, Stephen Warren, Thierry Reding, Russell King,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-doc-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Add efuse and apbmisc bindings for Tegra20, Tegra30, Tegra114 and Tegra124.
Signed-off-by: Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
.../bindings/fuse/nvidia,tegra20-fuse.txt | 40 ++++++++++++++++++++
.../bindings/misc/nvidia,tegra20-apbmisc.txt | 13 ++++++
arch/arm/boot/dts/tegra114.dtsi | 15 +++++++
arch/arm/boot/dts/tegra124.dtsi | 15 +++++++
arch/arm/boot/dts/tegra20.dtsi | 15 +++++++
arch/arm/boot/dts/tegra30.dtsi | 15 +++++++
6 files changed, 113 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
create mode 100644 Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
diff --git a/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt b/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
new file mode 100644
index 0000000..d8c98c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
@@ -0,0 +1,40 @@
+NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 fuse block.
+
+Required properties:
+- compatible : should be:
+ "nvidia,tegra20-efuse"
+ "nvidia,tegra30-efuse"
+ "nvidia,tegra114-efuse"
+ "nvidia,tegra124-efuse"
+ Details:
+ nvidia,tegra20-efuse: Tegra20 requires using APB DMA to read the fuse data
+ due to a hardware bug. Tegra20 also lacks certain information which is
+ available in later generations such as fab code, lot code, wafer id,..
+ nvidia,tegra30-efuse, nvidia,tegra114-efuse and nvidia,tegra124-efuse:
+ The differences between these SoCs are the size of the efuse array,
+ the location of the spare (OEM programmable) bits and the location of
+ the speedo data.
+- reg: Should contain 1 entry: the entry gives the physical address and length
+ of the fuse registers.
+- clocks: Must contain an entry for each entry in clock-names.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names: Must include the following entries:
+ - fuse
+- resets: Must contain an entry for each entry in reset-names.
+ See ../reset/reset.txt for details.
+- reset-names: Must include the following entries:
+ - fuse
+
+Example:
+
+ fuse@7000f800 {
+ compatible = "nvidia,tegra20-efuse";
+ reg = <0x7000F800 0x400>,
+ <0x70000000 0x400>;
+ clocks = <&tegra_car TEGRA20_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
+
diff --git a/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt b/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
new file mode 100644
index 0000000..b97b8be
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
@@ -0,0 +1,13 @@
+NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 apbmisc block
+
+Required properties:
+- compatible : should be:
+ "nvidia,tegra20-apbmisc"
+ "nvidia,tegra30-apbmisc"
+ "nvidia,tegra114-apbmisc"
+ "nvidia,tegra124-apbmisc"
+- reg: Should contain 2 entries: the first entry gives the physical address
+ and length of the registers which contain revision and debug features.
+ The second entry gives the physical address and length of the
+ registers indicating the strapping options.
+
diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
index fdc559a..335a1d8 100644
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@@ -220,6 +220,12 @@
interrupt-controller;
};
+ apbmisc@70000800 {
+ compatible = "nvidia,tegra114-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux@70000868 {
compatible = "nvidia,tegra114-pinmux";
reg = <0x70000868 0x148 /* Pad control registers */
@@ -485,6 +491,15 @@
clock-names = "pclk", "clk32k_in";
};
+ fuse@7000f800 {
+ compatible = "nvidia,tegra114-efuse";
+ reg = <0x7000f800 0x400>;
+ clocks = <&tegra_car TEGRA114_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
iommu@70019010 {
compatible = "nvidia,tegra114-smmu", "nvidia,tegra30-smmu";
reg = <0x70019010 0x02c
diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
index 6d540a0..9739a13 100644
--- a/arch/arm/boot/dts/tegra124.dtsi
+++ b/arch/arm/boot/dts/tegra124.dtsi
@@ -167,6 +167,12 @@
#dma-cells = <1>;
};
+ apbmisc@0,70000800 {
+ compatible = "nvidia,tegra124-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x0 0x70000800 0x0 0x64>, /* Chip revision */
+ <0x0 0x7000E864 0x0 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux@0,70000868 {
compatible = "nvidia,tegra124-pinmux";
reg = <0x0 0x70000868 0x0 0x164>, /* Pad control registers */
@@ -437,6 +443,15 @@
clock-names = "pclk", "clk32k_in";
};
+ fuse@0,7000f800 {
+ compatible = "nvidia,tegra124-efuse";
+ reg = <0x0 0x7000f800 0x0 0x400>;
+ clocks = <&tegra_car TEGRA124_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
sdhci@0,700b0000 {
compatible = "nvidia,tegra124-sdhci";
reg = <0x0 0x700b0000 0x0 0x200>;
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index a7ddf70..243d84c 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -236,6 +236,12 @@
interrupt-controller;
};
+ apbmisc@70000800 {
+ compatible = "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux@70000014 {
compatible = "nvidia,tegra20-pinmux";
reg = <0x70000014 0x10 /* Tri-state registers */
@@ -545,6 +551,15 @@
#size-cells = <0>;
};
+ fuse@7000f800 {
+ compatible = "nvidia,tegra20-efuse";
+ reg = <0x7000F800 0x400>;
+ clocks = <&tegra_car TEGRA20_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
pcie-controller@80003000 {
compatible = "nvidia,tegra20-pcie";
device_type = "pci";
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index dec4fc8..0b1ede9 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -335,6 +335,12 @@
interrupt-controller;
};
+ apbmisc@70000800 {
+ compatible = "nvidia,tegra30-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux@70000868 {
compatible = "nvidia,tegra30-pinmux";
reg = <0x70000868 0xd4 /* Pad control registers */
@@ -631,6 +637,15 @@
nvidia,ahb = <&ahb>;
};
+ fuse@7000f800 {
+ compatible = "nvidia,tegra30-efuse";
+ reg = <0x7000f800 0x400>;
+ clocks = <&tegra_car TEGRA30_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
ahub@70080000 {
compatible = "nvidia,tegra30-ahub";
reg = <0x70080000 0x200
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 4/6] ARM: tegra: Add efuse and apbmisc bindings
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: linux-arm-kernel
Add efuse and apbmisc bindings for Tegra20, Tegra30, Tegra114 and Tegra124.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
.../bindings/fuse/nvidia,tegra20-fuse.txt | 40 ++++++++++++++++++++
.../bindings/misc/nvidia,tegra20-apbmisc.txt | 13 ++++++
arch/arm/boot/dts/tegra114.dtsi | 15 +++++++
arch/arm/boot/dts/tegra124.dtsi | 15 +++++++
arch/arm/boot/dts/tegra20.dtsi | 15 +++++++
arch/arm/boot/dts/tegra30.dtsi | 15 +++++++
6 files changed, 113 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
create mode 100644 Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
diff --git a/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt b/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
new file mode 100644
index 0000000..d8c98c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
@@ -0,0 +1,40 @@
+NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 fuse block.
+
+Required properties:
+- compatible : should be:
+ "nvidia,tegra20-efuse"
+ "nvidia,tegra30-efuse"
+ "nvidia,tegra114-efuse"
+ "nvidia,tegra124-efuse"
+ Details:
+ nvidia,tegra20-efuse: Tegra20 requires using APB DMA to read the fuse data
+ due to a hardware bug. Tegra20 also lacks certain information which is
+ available in later generations such as fab code, lot code, wafer id,..
+ nvidia,tegra30-efuse, nvidia,tegra114-efuse and nvidia,tegra124-efuse:
+ The differences between these SoCs are the size of the efuse array,
+ the location of the spare (OEM programmable) bits and the location of
+ the speedo data.
+- reg: Should contain 1 entry: the entry gives the physical address and length
+ of the fuse registers.
+- clocks: Must contain an entry for each entry in clock-names.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names: Must include the following entries:
+ - fuse
+- resets: Must contain an entry for each entry in reset-names.
+ See ../reset/reset.txt for details.
+- reset-names: Must include the following entries:
+ - fuse
+
+Example:
+
+ fuse at 7000f800 {
+ compatible = "nvidia,tegra20-efuse";
+ reg = <0x7000F800 0x400>,
+ <0x70000000 0x400>;
+ clocks = <&tegra_car TEGRA20_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
+
diff --git a/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt b/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
new file mode 100644
index 0000000..b97b8be
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
@@ -0,0 +1,13 @@
+NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 apbmisc block
+
+Required properties:
+- compatible : should be:
+ "nvidia,tegra20-apbmisc"
+ "nvidia,tegra30-apbmisc"
+ "nvidia,tegra114-apbmisc"
+ "nvidia,tegra124-apbmisc"
+- reg: Should contain 2 entries: the first entry gives the physical address
+ and length of the registers which contain revision and debug features.
+ The second entry gives the physical address and length of the
+ registers indicating the strapping options.
+
diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
index fdc559a..335a1d8 100644
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@@ -220,6 +220,12 @@
interrupt-controller;
};
+ apbmisc at 70000800 {
+ compatible = "nvidia,tegra114-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux at 70000868 {
compatible = "nvidia,tegra114-pinmux";
reg = <0x70000868 0x148 /* Pad control registers */
@@ -485,6 +491,15 @@
clock-names = "pclk", "clk32k_in";
};
+ fuse@7000f800 {
+ compatible = "nvidia,tegra114-efuse";
+ reg = <0x7000f800 0x400>;
+ clocks = <&tegra_car TEGRA114_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
iommu at 70019010 {
compatible = "nvidia,tegra114-smmu", "nvidia,tegra30-smmu";
reg = <0x70019010 0x02c
diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
index 6d540a0..9739a13 100644
--- a/arch/arm/boot/dts/tegra124.dtsi
+++ b/arch/arm/boot/dts/tegra124.dtsi
@@ -167,6 +167,12 @@
#dma-cells = <1>;
};
+ apbmisc at 0,70000800 {
+ compatible = "nvidia,tegra124-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x0 0x70000800 0x0 0x64>, /* Chip revision */
+ <0x0 0x7000E864 0x0 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux at 0,70000868 {
compatible = "nvidia,tegra124-pinmux";
reg = <0x0 0x70000868 0x0 0x164>, /* Pad control registers */
@@ -437,6 +443,15 @@
clock-names = "pclk", "clk32k_in";
};
+ fuse at 0,7000f800 {
+ compatible = "nvidia,tegra124-efuse";
+ reg = <0x0 0x7000f800 0x0 0x400>;
+ clocks = <&tegra_car TEGRA124_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
sdhci at 0,700b0000 {
compatible = "nvidia,tegra124-sdhci";
reg = <0x0 0x700b0000 0x0 0x200>;
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index a7ddf70..243d84c 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -236,6 +236,12 @@
interrupt-controller;
};
+ apbmisc at 70000800 {
+ compatible = "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux at 70000014 {
compatible = "nvidia,tegra20-pinmux";
reg = <0x70000014 0x10 /* Tri-state registers */
@@ -545,6 +551,15 @@
#size-cells = <0>;
};
+ fuse at 7000f800 {
+ compatible = "nvidia,tegra20-efuse";
+ reg = <0x7000F800 0x400>;
+ clocks = <&tegra_car TEGRA20_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
pcie-controller at 80003000 {
compatible = "nvidia,tegra20-pcie";
device_type = "pci";
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index dec4fc8..0b1ede9 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -335,6 +335,12 @@
interrupt-controller;
};
+ apbmisc at 70000800 {
+ compatible = "nvidia,tegra30-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux at 70000868 {
compatible = "nvidia,tegra30-pinmux";
reg = <0x70000868 0xd4 /* Pad control registers */
@@ -631,6 +637,15 @@
nvidia,ahb = <&ahb>;
};
+ fuse at 7000f800 {
+ compatible = "nvidia,tegra30-efuse";
+ reg = <0x7000f800 0x400>;
+ clocks = <&tegra_car TEGRA30_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
ahub at 70080000 {
compatible = "nvidia,tegra30-ahub";
reg = <0x70080000 0x200
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 4/6] ARM: tegra: Add efuse and apbmisc bindings
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Rob Herring, Pawel Moll, Mark Rutland, Ian Campbell, Kumar Gala,
Randy Dunlap, Stephen Warren, Thierry Reding, Russell King,
devicetree, linux-doc, linux-tegra, linux-kernel,
linux-arm-kernel
Add efuse and apbmisc bindings for Tegra20, Tegra30, Tegra114 and Tegra124.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
.../bindings/fuse/nvidia,tegra20-fuse.txt | 40 ++++++++++++++++++++
.../bindings/misc/nvidia,tegra20-apbmisc.txt | 13 ++++++
arch/arm/boot/dts/tegra114.dtsi | 15 +++++++
arch/arm/boot/dts/tegra124.dtsi | 15 +++++++
arch/arm/boot/dts/tegra20.dtsi | 15 +++++++
arch/arm/boot/dts/tegra30.dtsi | 15 +++++++
6 files changed, 113 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
create mode 100644 Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
diff --git a/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt b/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
new file mode 100644
index 0000000..d8c98c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
@@ -0,0 +1,40 @@
+NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 fuse block.
+
+Required properties:
+- compatible : should be:
+ "nvidia,tegra20-efuse"
+ "nvidia,tegra30-efuse"
+ "nvidia,tegra114-efuse"
+ "nvidia,tegra124-efuse"
+ Details:
+ nvidia,tegra20-efuse: Tegra20 requires using APB DMA to read the fuse data
+ due to a hardware bug. Tegra20 also lacks certain information which is
+ available in later generations such as fab code, lot code, wafer id,..
+ nvidia,tegra30-efuse, nvidia,tegra114-efuse and nvidia,tegra124-efuse:
+ The differences between these SoCs are the size of the efuse array,
+ the location of the spare (OEM programmable) bits and the location of
+ the speedo data.
+- reg: Should contain 1 entry: the entry gives the physical address and length
+ of the fuse registers.
+- clocks: Must contain an entry for each entry in clock-names.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names: Must include the following entries:
+ - fuse
+- resets: Must contain an entry for each entry in reset-names.
+ See ../reset/reset.txt for details.
+- reset-names: Must include the following entries:
+ - fuse
+
+Example:
+
+ fuse@7000f800 {
+ compatible = "nvidia,tegra20-efuse";
+ reg = <0x7000F800 0x400>,
+ <0x70000000 0x400>;
+ clocks = <&tegra_car TEGRA20_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
+
diff --git a/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt b/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
new file mode 100644
index 0000000..b97b8be
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
@@ -0,0 +1,13 @@
+NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 apbmisc block
+
+Required properties:
+- compatible : should be:
+ "nvidia,tegra20-apbmisc"
+ "nvidia,tegra30-apbmisc"
+ "nvidia,tegra114-apbmisc"
+ "nvidia,tegra124-apbmisc"
+- reg: Should contain 2 entries: the first entry gives the physical address
+ and length of the registers which contain revision and debug features.
+ The second entry gives the physical address and length of the
+ registers indicating the strapping options.
+
diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
index fdc559a..335a1d8 100644
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@@ -220,6 +220,12 @@
interrupt-controller;
};
+ apbmisc@70000800 {
+ compatible = "nvidia,tegra114-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux@70000868 {
compatible = "nvidia,tegra114-pinmux";
reg = <0x70000868 0x148 /* Pad control registers */
@@ -485,6 +491,15 @@
clock-names = "pclk", "clk32k_in";
};
+ fuse@7000f800 {
+ compatible = "nvidia,tegra114-efuse";
+ reg = <0x7000f800 0x400>;
+ clocks = <&tegra_car TEGRA114_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
iommu@70019010 {
compatible = "nvidia,tegra114-smmu", "nvidia,tegra30-smmu";
reg = <0x70019010 0x02c
diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
index 6d540a0..9739a13 100644
--- a/arch/arm/boot/dts/tegra124.dtsi
+++ b/arch/arm/boot/dts/tegra124.dtsi
@@ -167,6 +167,12 @@
#dma-cells = <1>;
};
+ apbmisc@0,70000800 {
+ compatible = "nvidia,tegra124-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x0 0x70000800 0x0 0x64>, /* Chip revision */
+ <0x0 0x7000E864 0x0 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux@0,70000868 {
compatible = "nvidia,tegra124-pinmux";
reg = <0x0 0x70000868 0x0 0x164>, /* Pad control registers */
@@ -437,6 +443,15 @@
clock-names = "pclk", "clk32k_in";
};
+ fuse@0,7000f800 {
+ compatible = "nvidia,tegra124-efuse";
+ reg = <0x0 0x7000f800 0x0 0x400>;
+ clocks = <&tegra_car TEGRA124_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
sdhci@0,700b0000 {
compatible = "nvidia,tegra124-sdhci";
reg = <0x0 0x700b0000 0x0 0x200>;
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index a7ddf70..243d84c 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -236,6 +236,12 @@
interrupt-controller;
};
+ apbmisc@70000800 {
+ compatible = "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux@70000014 {
compatible = "nvidia,tegra20-pinmux";
reg = <0x70000014 0x10 /* Tri-state registers */
@@ -545,6 +551,15 @@
#size-cells = <0>;
};
+ fuse@7000f800 {
+ compatible = "nvidia,tegra20-efuse";
+ reg = <0x7000F800 0x400>;
+ clocks = <&tegra_car TEGRA20_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
pcie-controller@80003000 {
compatible = "nvidia,tegra20-pcie";
device_type = "pci";
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index dec4fc8..0b1ede9 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -335,6 +335,12 @@
interrupt-controller;
};
+ apbmisc@70000800 {
+ compatible = "nvidia,tegra30-apbmisc", "nvidia,tegra20-apbmisc";
+ reg = <0x70000800 0x64 /* Chip revision */
+ 0x70000008 0x04>; /* Strapping options */
+ };
+
pinmux: pinmux@70000868 {
compatible = "nvidia,tegra30-pinmux";
reg = <0x70000868 0xd4 /* Pad control registers */
@@ -631,6 +637,15 @@
nvidia,ahb = <&ahb>;
};
+ fuse@7000f800 {
+ compatible = "nvidia,tegra30-efuse";
+ reg = <0x7000f800 0x400>;
+ clocks = <&tegra_car TEGRA30_CLK_FUSE>;
+ clock-names = "fuse";
+ resets = <&tegra_car 39>;
+ reset-names = "fuse";
+ };
+
ahub@70080000 {
compatible = "nvidia,tegra30-ahub";
reg = <0x70080000 0x200
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v8 5/6] ARM: tegra: build new fuse driver in drivers/misc
2014-06-12 15:36 ` Peter De Schrijver
(?)
@ 2014-06-12 15:36 ` Peter De Schrijver
-1 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Russell King, Stephen Warren, Thierry Reding, Arnd Bergmann,
Greg Kroah-Hartman, Joseph Lo, Bjorn Helgaas, Alexandre Courbot,
Olof Johansson, Linus Walleij, Herbert Xu, Sebastian Hesselbarth,
Tuomas Tynkkynen,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
The Tegra fuse code has moved to drivers/misc/fuse/tegra. Enable the
building of that code, and disable the building of the old fuse code in
arch/arm/mach-tegra/. Also move the only user of tegra_revision over to
tegra_sku_info.revision and export tegra_fuse_readl to allow drivers to read
calibration fuses.
Signed-off-by: Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
arch/arm/mach-tegra/Makefile | 4 -
arch/arm/mach-tegra/fuse.c | 252 ----------------------------
arch/arm/mach-tegra/fuse.h | 61 -------
arch/arm/mach-tegra/tegra.c | 3 +-
arch/arm/mach-tegra/tegra114_speedo.c | 105 ------------
arch/arm/mach-tegra/tegra20_speedo.c | 110 ------------
arch/arm/mach-tegra/tegra30_speedo.c | 293 ---------------------------------
drivers/misc/Makefile | 1 +
drivers/misc/fuse/tegra/fuse-tegra.c | 10 +
include/linux/tegra-soc.h | 2 +-
10 files changed, 14 insertions(+), 827 deletions(-)
delete mode 100644 arch/arm/mach-tegra/fuse.c
delete mode 100644 arch/arm/mach-tegra/fuse.h
delete mode 100644 arch/arm/mach-tegra/tegra114_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra20_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra30_speedo.c
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 6fbfbb7..e8601bb 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -2,7 +2,6 @@ asflags-y += -march=armv7-a
obj-y += io.o
obj-y += irq.o
-obj-y += fuse.o
obj-y += pmc.o
obj-y += flowctrl.o
obj-y += powergate.o
@@ -13,13 +12,11 @@ obj-y += reset-handler.o
obj-y += sleep.o
obj-y += tegra.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
-obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += sleep-tegra20.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += pm-tegra20.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += cpuidle-tegra20.o
endif
-obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_speedo.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += sleep-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
@@ -28,7 +25,6 @@ endif
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
-obj-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114_speedo.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += sleep-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
deleted file mode 100644
index c9ac23b..0000000
--- a/arch/arm/mach-tegra/fuse.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/*
- * arch/arm/mach-tegra/fuse.c
- *
- * Copyright (C) 2010 Google, Inc.
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * Author:
- * Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/export.h>
-#include <linux/random.h>
-#include <linux/clk.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-#include "iomap.h"
-#include "apbio.h"
-
-/* Tegra20 only */
-#define FUSE_UID_LOW 0x108
-#define FUSE_UID_HIGH 0x10c
-
-/* Tegra30 and later */
-#define FUSE_VENDOR_CODE 0x200
-#define FUSE_FAB_CODE 0x204
-#define FUSE_LOT_CODE_0 0x208
-#define FUSE_LOT_CODE_1 0x20c
-#define FUSE_WAFER_ID 0x210
-#define FUSE_X_COORDINATE 0x214
-#define FUSE_Y_COORDINATE 0x218
-
-#define FUSE_SKU_INFO 0x110
-
-#define TEGRA20_FUSE_SPARE_BIT 0x200
-#define TEGRA30_FUSE_SPARE_BIT 0x244
-
-int tegra_sku_id;
-int tegra_cpu_process_id;
-int tegra_core_process_id;
-int tegra_chip_id;
-int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
-int tegra_soc_speedo_id;
-enum tegra_revision tegra_revision;
-
-static struct clk *fuse_clk;
-static int tegra_fuse_spare_bit;
-static void (*tegra_init_speedo_data)(void);
-
-/* The BCT to use at boot is specified by board straps that can be read
- * through a APB misc register and decoded. 2 bits, i.e. 4 possible BCTs.
- */
-int tegra_bct_strapping;
-
-#define STRAP_OPT 0x008
-#define GMI_AD0 (1 << 4)
-#define GMI_AD1 (1 << 5)
-#define RAM_ID_MASK (GMI_AD0 | GMI_AD1)
-#define RAM_CODE_SHIFT 4
-
-static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
- [TEGRA_REVISION_UNKNOWN] = "unknown",
- [TEGRA_REVISION_A01] = "A01",
- [TEGRA_REVISION_A02] = "A02",
- [TEGRA_REVISION_A03] = "A03",
- [TEGRA_REVISION_A03p] = "A03 prime",
- [TEGRA_REVISION_A04] = "A04",
-};
-
-static void tegra_fuse_enable_clk(void)
-{
- if (IS_ERR(fuse_clk))
- fuse_clk = clk_get_sys(NULL, "fuse");
- if (IS_ERR(fuse_clk))
- return;
- clk_prepare_enable(fuse_clk);
-}
-
-static void tegra_fuse_disable_clk(void)
-{
- if (IS_ERR(fuse_clk))
- return;
- clk_disable_unprepare(fuse_clk);
-}
-
-u32 tegra_fuse_readl(unsigned long offset)
-{
- return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
-}
-
-bool tegra_spare_fuse(int bit)
-{
- bool ret;
-
- tegra_fuse_enable_clk();
-
- ret = tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
-
- tegra_fuse_disable_clk();
-
- return ret;
-}
-
-static enum tegra_revision tegra_get_revision(u32 id)
-{
- u32 minor_rev = (id >> 16) & 0xf;
-
- switch (minor_rev) {
- case 1:
- return TEGRA_REVISION_A01;
- case 2:
- return TEGRA_REVISION_A02;
- case 3:
- if (tegra_chip_id == TEGRA20 &&
- (tegra_spare_fuse(18) || tegra_spare_fuse(19)))
- return TEGRA_REVISION_A03p;
- else
- return TEGRA_REVISION_A03;
- case 4:
- return TEGRA_REVISION_A04;
- default:
- return TEGRA_REVISION_UNKNOWN;
- }
-}
-
-static void tegra_get_process_id(void)
-{
- u32 reg;
-
- tegra_fuse_enable_clk();
-
- reg = tegra_fuse_readl(tegra_fuse_spare_bit);
- tegra_cpu_process_id = (reg >> 6) & 3;
- reg = tegra_fuse_readl(tegra_fuse_spare_bit);
- tegra_core_process_id = (reg >> 12) & 3;
-
- tegra_fuse_disable_clk();
-}
-
-u32 tegra_read_chipid(void)
-{
- return readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
-}
-
-static void __init tegra20_fuse_init_randomness(void)
-{
- u32 randomness[2];
-
- randomness[0] = tegra_fuse_readl(FUSE_UID_LOW);
- randomness[1] = tegra_fuse_readl(FUSE_UID_HIGH);
-
- add_device_randomness(randomness, sizeof(randomness));
-}
-
-/* Applies to Tegra30 or later */
-static void __init tegra30_fuse_init_randomness(void)
-{
- u32 randomness[7];
-
- randomness[0] = tegra_fuse_readl(FUSE_VENDOR_CODE);
- randomness[1] = tegra_fuse_readl(FUSE_FAB_CODE);
- randomness[2] = tegra_fuse_readl(FUSE_LOT_CODE_0);
- randomness[3] = tegra_fuse_readl(FUSE_LOT_CODE_1);
- randomness[4] = tegra_fuse_readl(FUSE_WAFER_ID);
- randomness[5] = tegra_fuse_readl(FUSE_X_COORDINATE);
- randomness[6] = tegra_fuse_readl(FUSE_Y_COORDINATE);
-
- add_device_randomness(randomness, sizeof(randomness));
-}
-
-void __init tegra_init_fuse(void)
-{
- u32 id;
- u32 randomness[5];
-
- u32 reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
- reg |= 1 << 28;
- writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
-
- /*
- * Enable FUSE clock. This needs to be hardcoded because the clock
- * subsystem is not active during early boot.
- */
- reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
- reg |= 1 << 7;
- writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
- fuse_clk = ERR_PTR(-EINVAL);
-
- reg = tegra_fuse_readl(FUSE_SKU_INFO);
- randomness[0] = reg;
- tegra_sku_id = reg & 0xFF;
-
- reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
- randomness[1] = reg;
- tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
-
- id = tegra_read_chipid();
- randomness[2] = id;
- tegra_chip_id = (id >> 8) & 0xff;
-
- switch (tegra_chip_id) {
- case TEGRA20:
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra20_init_speedo_data;
- break;
- case TEGRA30:
- tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra30_init_speedo_data;
- break;
- case TEGRA114:
- tegra_init_speedo_data = &tegra114_init_speedo_data;
- break;
- default:
- pr_warn("Tegra: unknown chip id %d\n", tegra_chip_id);
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra_get_process_id;
- }
-
- tegra_revision = tegra_get_revision(id);
- tegra_init_speedo_data();
- randomness[3] = (tegra_cpu_process_id << 16) | tegra_core_process_id;
- randomness[4] = (tegra_cpu_speedo_id << 16) | tegra_soc_speedo_id;
-
- add_device_randomness(randomness, sizeof(randomness));
- switch (tegra_chip_id) {
- case TEGRA20:
- tegra20_fuse_init_randomness();
- break;
- case TEGRA30:
- case TEGRA114:
- default:
- tegra30_fuse_init_randomness();
- break;
- }
-
- pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
- tegra_revision_name[tegra_revision],
- tegra_sku_id, tegra_cpu_process_id,
- tegra_core_process_id);
-}
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
deleted file mode 100644
index b17c4ba..0000000
--- a/arch/arm/mach-tegra/fuse.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright (C) 2010 Google, Inc.
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * Author:
- * Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __MACH_TEGRA_FUSE_H
-#define __MACH_TEGRA_FUSE_H
-
-#define SKU_ID_T20 8
-#define SKU_ID_T25SE 20
-#define SKU_ID_AP25 23
-#define SKU_ID_T25 24
-#define SKU_ID_AP25E 27
-#define SKU_ID_T25E 28
-
-#ifndef __ASSEMBLY__
-
-extern int tegra_sku_id;
-extern int tegra_cpu_process_id;
-extern int tegra_core_process_id;
-extern int tegra_chip_id;
-extern int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
-extern int tegra_soc_speedo_id;
-
-unsigned long long tegra_chip_uid(void);
-bool tegra_spare_fuse(int bit);
-u32 tegra_fuse_readl(unsigned long offset);
-
-#ifdef CONFIG_ARCH_TEGRA_2x_SOC
-void tegra20_init_speedo_data(void);
-#else
-static inline void tegra20_init_speedo_data(void) {}
-#endif
-
-#ifdef CONFIG_ARCH_TEGRA_3x_SOC
-void tegra30_init_speedo_data(void);
-#else
-static inline void tegra30_init_speedo_data(void) {}
-#endif
-
-#ifdef CONFIG_ARCH_TEGRA_114_SOC
-void tegra114_init_speedo_data(void);
-#else
-static inline void tegra114_init_speedo_data(void) {}
-#endif
-#endif /* __ASSEMBLY__ */
-
-#endif
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index e48b271..093d5f4 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -131,7 +131,8 @@ static void __init tegra_dt_init(void)
goto out;
soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");
- soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_revision);
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d",
+ tegra_sku_info.revision);
soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%d", tegra_chip_id);
soc_dev = soc_device_register(soc_dev_attr);
diff --git a/arch/arm/mach-tegra/tegra114_speedo.c b/arch/arm/mach-tegra/tegra114_speedo.c
deleted file mode 100644
index 7c73716..0000000
--- a/arch/arm/mach-tegra/tegra114_speedo.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CORE_PROCESS_CORNERS_NUM 2
-#define CPU_PROCESS_CORNERS_NUM 2
-
-enum {
- THRESHOLD_INDEX_0,
- THRESHOLD_INDEX_1,
- THRESHOLD_INDEX_COUNT,
-};
-
-static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
- {1123, UINT_MAX},
- {0, UINT_MAX},
-};
-
-static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
- {1695, UINT_MAX},
- {0, UINT_MAX},
-};
-
-static void rev_sku_to_speedo_ids(int rev, int sku, int *threshold)
-{
- u32 tmp;
-
- switch (sku) {
- case 0x00:
- case 0x10:
- case 0x05:
- case 0x06:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 0;
- *threshold = THRESHOLD_INDEX_0;
- break;
-
- case 0x03:
- case 0x04:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 1;
- *threshold = THRESHOLD_INDEX_1;
- break;
-
- default:
- pr_err("Tegra114 Unknown SKU %d\n", sku);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- *threshold = THRESHOLD_INDEX_0;
- break;
- }
-
- if (rev == TEGRA_REVISION_A01) {
- tmp = tegra_fuse_readl(0x270) << 1;
- tmp |= tegra_fuse_readl(0x26c);
- if (!tmp)
- tegra_cpu_speedo_id = 0;
- }
-}
-
-void tegra114_init_speedo_data(void)
-{
- u32 cpu_speedo_val;
- u32 core_speedo_val;
- int threshold;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
-
- rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id, &threshold);
-
- cpu_speedo_val = tegra_fuse_readl(0x12c) + 1024;
- core_speedo_val = tegra_fuse_readl(0x134);
-
- for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++)
- if (cpu_speedo_val < cpu_process_speedos[threshold][i])
- break;
- tegra_cpu_process_id = i;
-
- for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++)
- if (core_speedo_val < core_process_speedos[threshold][i])
- break;
- tegra_core_process_id = i;
-}
diff --git a/arch/arm/mach-tegra/tegra20_speedo.c b/arch/arm/mach-tegra/tegra20_speedo.c
deleted file mode 100644
index 3b1bb53..0000000
--- a/arch/arm/mach-tegra/tegra20_speedo.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CPU_SPEEDO_LSBIT 20
-#define CPU_SPEEDO_MSBIT 29
-#define CPU_SPEEDO_REDUND_LSBIT 30
-#define CPU_SPEEDO_REDUND_MSBIT 39
-#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT)
-
-#define CORE_SPEEDO_LSBIT 40
-#define CORE_SPEEDO_MSBIT 47
-#define CORE_SPEEDO_REDUND_LSBIT 48
-#define CORE_SPEEDO_REDUND_MSBIT 55
-#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT)
-
-#define SPEEDO_MULT 4
-
-#define PROCESS_CORNERS_NUM 4
-
-#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2)
-#define SPEEDO_ID_SELECT_1(sku) \
- (((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \
- ((sku) != 27) && ((sku) != 28))
-
-enum {
- SPEEDO_ID_0,
- SPEEDO_ID_1,
- SPEEDO_ID_2,
- SPEEDO_ID_COUNT,
-};
-
-static const u32 cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
- {315, 366, 420, UINT_MAX},
- {303, 368, 419, UINT_MAX},
- {316, 331, 383, UINT_MAX},
-};
-
-static const u32 core_process_speedos[][PROCESS_CORNERS_NUM] = {
- {165, 195, 224, UINT_MAX},
- {165, 195, 224, UINT_MAX},
- {165, 195, 224, UINT_MAX},
-};
-
-void tegra20_init_speedo_data(void)
-{
- u32 reg;
- u32 val;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT);
-
- if (SPEEDO_ID_SELECT_0(tegra_revision))
- tegra_soc_speedo_id = SPEEDO_ID_0;
- else if (SPEEDO_ID_SELECT_1(tegra_sku_id))
- tegra_soc_speedo_id = SPEEDO_ID_1;
- else
- tegra_soc_speedo_id = SPEEDO_ID_2;
-
- val = 0;
- for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
- reg = tegra_spare_fuse(i) |
- tegra_spare_fuse(i + CPU_SPEEDO_REDUND_OFFS);
- val = (val << 1) | (reg & 0x1);
- }
- val = val * SPEEDO_MULT;
- pr_debug("%s CPU speedo value %u\n", __func__, val);
-
- for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
- if (val <= cpu_process_speedos[tegra_soc_speedo_id][i])
- break;
- }
- tegra_cpu_process_id = i;
-
- val = 0;
- for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) {
- reg = tegra_spare_fuse(i) |
- tegra_spare_fuse(i + CORE_SPEEDO_REDUND_OFFS);
- val = (val << 1) | (reg & 0x1);
- }
- val = val * SPEEDO_MULT;
- pr_debug("%s Core speedo value %u\n", __func__, val);
-
- for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
- if (val <= core_process_speedos[tegra_soc_speedo_id][i])
- break;
- }
- tegra_core_process_id = i;
-
- pr_info("Tegra20 Soc Speedo ID %d", tegra_soc_speedo_id);
-}
diff --git a/arch/arm/mach-tegra/tegra30_speedo.c b/arch/arm/mach-tegra/tegra30_speedo.c
deleted file mode 100644
index 81a958d..0000000
--- a/arch/arm/mach-tegra/tegra30_speedo.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CORE_PROCESS_CORNERS_NUM 1
-#define CPU_PROCESS_CORNERS_NUM 6
-
-#define FUSE_SPEEDO_CALIB_0 0x114
-#define FUSE_PACKAGE_INFO 0X1FC
-#define FUSE_TEST_PROG_VER 0X128
-
-#define G_SPEEDO_BIT_MINUS1 58
-#define G_SPEEDO_BIT_MINUS1_R 59
-#define G_SPEEDO_BIT_MINUS2 60
-#define G_SPEEDO_BIT_MINUS2_R 61
-#define LP_SPEEDO_BIT_MINUS1 62
-#define LP_SPEEDO_BIT_MINUS1_R 63
-#define LP_SPEEDO_BIT_MINUS2 64
-#define LP_SPEEDO_BIT_MINUS2_R 65
-
-enum {
- THRESHOLD_INDEX_0,
- THRESHOLD_INDEX_1,
- THRESHOLD_INDEX_2,
- THRESHOLD_INDEX_3,
- THRESHOLD_INDEX_4,
- THRESHOLD_INDEX_5,
- THRESHOLD_INDEX_6,
- THRESHOLD_INDEX_7,
- THRESHOLD_INDEX_8,
- THRESHOLD_INDEX_9,
- THRESHOLD_INDEX_10,
- THRESHOLD_INDEX_11,
- THRESHOLD_INDEX_COUNT,
-};
-
-static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
- {180},
- {170},
- {195},
- {180},
- {168},
- {192},
- {180},
- {170},
- {195},
- {180},
- {180},
- {180},
-};
-
-static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
- {306, 338, 360, 376, UINT_MAX},
- {295, 336, 358, 375, UINT_MAX},
- {325, 325, 358, 375, UINT_MAX},
- {325, 325, 358, 375, UINT_MAX},
- {292, 324, 348, 364, UINT_MAX},
- {324, 324, 348, 364, UINT_MAX},
- {324, 324, 348, 364, UINT_MAX},
- {295, 336, 358, 375, UINT_MAX},
- {358, 358, 358, 358, 397, UINT_MAX},
- {364, 364, 364, 364, 397, UINT_MAX},
- {295, 336, 358, 375, 391, UINT_MAX},
- {295, 336, 358, 375, 391, UINT_MAX},
-};
-
-static int threshold_index;
-static int package_id;
-
-static void fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
-{
- u32 reg;
- int ate_ver;
- int bit_minus1;
- int bit_minus2;
-
- reg = tegra_fuse_readl(FUSE_SPEEDO_CALIB_0);
-
- *speedo_lp = (reg & 0xFFFF) * 4;
- *speedo_g = ((reg >> 16) & 0xFFFF) * 4;
-
- ate_ver = tegra_fuse_readl(FUSE_TEST_PROG_VER);
- pr_info("%s: ATE prog ver %d.%d\n", __func__, ate_ver/10, ate_ver%10);
-
- if (ate_ver >= 26) {
- bit_minus1 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1);
- bit_minus1 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1_R);
- bit_minus2 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2);
- bit_minus2 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2_R);
- *speedo_lp |= (bit_minus1 << 1) | bit_minus2;
-
- bit_minus1 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS1);
- bit_minus1 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS1_R);
- bit_minus2 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS2);
- bit_minus2 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS2_R);
- *speedo_g |= (bit_minus1 << 1) | bit_minus2;
- } else {
- *speedo_lp |= 0x3;
- *speedo_g |= 0x3;
- }
-}
-
-static void rev_sku_to_speedo_ids(int rev, int sku)
-{
- switch (rev) {
- case TEGRA_REVISION_A01:
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- case TEGRA_REVISION_A02:
- case TEGRA_REVISION_A03:
- switch (sku) {
- case 0x87:
- case 0x82:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_1;
- break;
- case 0x81:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_2;
- break;
- case 2:
- tegra_cpu_speedo_id = 4;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_7;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x80:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 5;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_8;
- break;
- case 2:
- tegra_cpu_speedo_id = 6;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_9;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x83:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 7;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_10;
- break;
- case 2:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_3;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x8F:
- tegra_cpu_speedo_id = 8;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_11;
- break;
- case 0x08:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_4;
- break;
- case 0x02:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_5;
- break;
- case 0x04:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_6;
- break;
- case 0:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_2;
- break;
- case 2:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_3;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- default:
- pr_warn("Tegra30: Unknown SKU %d\n", sku);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- }
- break;
- default:
- pr_warn("Tegra30: Unknown chip rev %d\n", rev);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- }
-}
-
-void tegra30_init_speedo_data(void)
-{
- u32 cpu_speedo_val;
- u32 core_speedo_val;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
-
- package_id = tegra_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
-
- rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id);
- fuse_speedo_calib(&cpu_speedo_val, &core_speedo_val);
- pr_debug("%s CPU speedo value %u\n", __func__, cpu_speedo_val);
- pr_debug("%s Core speedo value %u\n", __func__, core_speedo_val);
-
- for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) {
- if (cpu_speedo_val < cpu_process_speedos[threshold_index][i])
- break;
- }
- tegra_cpu_process_id = i - 1;
-
- if (tegra_cpu_process_id == -1) {
- pr_warn("Tegra30: CPU speedo value %3d out of range",
- cpu_speedo_val);
- tegra_cpu_process_id = 0;
- tegra_cpu_speedo_id = 1;
- }
-
- for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) {
- if (core_speedo_val < core_process_speedos[threshold_index][i])
- break;
- }
- tegra_core_process_id = i - 1;
-
- if (tegra_core_process_id == -1) {
- pr_warn("Tegra30: CORE speedo value %3d out of range",
- core_speedo_val);
- tegra_core_process_id = 0;
- tegra_soc_speedo_id = 1;
- }
-
- pr_info("Tegra30: CPU Speedo ID %d, Soc Speedo ID %d",
- tegra_cpu_speedo_id, tegra_soc_speedo_id);
-}
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 7eb4b69..ecb9349 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -55,3 +55,4 @@ obj-$(CONFIG_SRAM) += sram.o
obj-y += mic/
obj-$(CONFIG_GENWQE) += genwqe/
obj-$(CONFIG_ECHO) += echo/
+obj-y += fuse/
diff --git a/drivers/misc/fuse/tegra/fuse-tegra.c b/drivers/misc/fuse/tegra/fuse-tegra.c
index 3fa6f74..934073e 100644
--- a/drivers/misc/fuse/tegra/fuse-tegra.c
+++ b/drivers/misc/fuse/tegra/fuse-tegra.c
@@ -98,6 +98,16 @@ static void tegra_enable_fuse_clk(void __iomem *base)
writel(reg, base + 0x14);
}
+int tegra_fuse_readl(u32 offset, u32 *val)
+{
+ if (!fuse_readl)
+ return -EPROBE_DEFER;
+
+ *val = fuse_readl(offset);
+
+ return 0;
+}
+
int tegra_fuse_create_sysfs(struct device *dev, int size,
u32 (*readl)(const unsigned int offset))
{
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 5c33b16..1ca3756 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -54,9 +54,9 @@ struct tegra_sku_info {
u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
void tegra_init_fuse(void);
+int tegra_fuse_readl(u32 offset, u32 *val);
extern int tegra_chip_id;
-extern enum tegra_revision tegra_revision;
extern struct tegra_sku_info tegra_sku_info;
#if defined(CONFIG_TEGRA20_APB_DMA)
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 5/6] ARM: tegra: build new fuse driver in drivers/misc
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: linux-arm-kernel
The Tegra fuse code has moved to drivers/misc/fuse/tegra. Enable the
building of that code, and disable the building of the old fuse code in
arch/arm/mach-tegra/. Also move the only user of tegra_revision over to
tegra_sku_info.revision and export tegra_fuse_readl to allow drivers to read
calibration fuses.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
arch/arm/mach-tegra/Makefile | 4 -
arch/arm/mach-tegra/fuse.c | 252 ----------------------------
arch/arm/mach-tegra/fuse.h | 61 -------
arch/arm/mach-tegra/tegra.c | 3 +-
arch/arm/mach-tegra/tegra114_speedo.c | 105 ------------
arch/arm/mach-tegra/tegra20_speedo.c | 110 ------------
arch/arm/mach-tegra/tegra30_speedo.c | 293 ---------------------------------
drivers/misc/Makefile | 1 +
drivers/misc/fuse/tegra/fuse-tegra.c | 10 +
include/linux/tegra-soc.h | 2 +-
10 files changed, 14 insertions(+), 827 deletions(-)
delete mode 100644 arch/arm/mach-tegra/fuse.c
delete mode 100644 arch/arm/mach-tegra/fuse.h
delete mode 100644 arch/arm/mach-tegra/tegra114_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra20_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra30_speedo.c
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 6fbfbb7..e8601bb 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -2,7 +2,6 @@ asflags-y += -march=armv7-a
obj-y += io.o
obj-y += irq.o
-obj-y += fuse.o
obj-y += pmc.o
obj-y += flowctrl.o
obj-y += powergate.o
@@ -13,13 +12,11 @@ obj-y += reset-handler.o
obj-y += sleep.o
obj-y += tegra.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
-obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += sleep-tegra20.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += pm-tegra20.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += cpuidle-tegra20.o
endif
-obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_speedo.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += sleep-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
@@ -28,7 +25,6 @@ endif
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
-obj-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114_speedo.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += sleep-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
deleted file mode 100644
index c9ac23b..0000000
--- a/arch/arm/mach-tegra/fuse.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/*
- * arch/arm/mach-tegra/fuse.c
- *
- * Copyright (C) 2010 Google, Inc.
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * Author:
- * Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/export.h>
-#include <linux/random.h>
-#include <linux/clk.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-#include "iomap.h"
-#include "apbio.h"
-
-/* Tegra20 only */
-#define FUSE_UID_LOW 0x108
-#define FUSE_UID_HIGH 0x10c
-
-/* Tegra30 and later */
-#define FUSE_VENDOR_CODE 0x200
-#define FUSE_FAB_CODE 0x204
-#define FUSE_LOT_CODE_0 0x208
-#define FUSE_LOT_CODE_1 0x20c
-#define FUSE_WAFER_ID 0x210
-#define FUSE_X_COORDINATE 0x214
-#define FUSE_Y_COORDINATE 0x218
-
-#define FUSE_SKU_INFO 0x110
-
-#define TEGRA20_FUSE_SPARE_BIT 0x200
-#define TEGRA30_FUSE_SPARE_BIT 0x244
-
-int tegra_sku_id;
-int tegra_cpu_process_id;
-int tegra_core_process_id;
-int tegra_chip_id;
-int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
-int tegra_soc_speedo_id;
-enum tegra_revision tegra_revision;
-
-static struct clk *fuse_clk;
-static int tegra_fuse_spare_bit;
-static void (*tegra_init_speedo_data)(void);
-
-/* The BCT to use at boot is specified by board straps that can be read
- * through a APB misc register and decoded. 2 bits, i.e. 4 possible BCTs.
- */
-int tegra_bct_strapping;
-
-#define STRAP_OPT 0x008
-#define GMI_AD0 (1 << 4)
-#define GMI_AD1 (1 << 5)
-#define RAM_ID_MASK (GMI_AD0 | GMI_AD1)
-#define RAM_CODE_SHIFT 4
-
-static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
- [TEGRA_REVISION_UNKNOWN] = "unknown",
- [TEGRA_REVISION_A01] = "A01",
- [TEGRA_REVISION_A02] = "A02",
- [TEGRA_REVISION_A03] = "A03",
- [TEGRA_REVISION_A03p] = "A03 prime",
- [TEGRA_REVISION_A04] = "A04",
-};
-
-static void tegra_fuse_enable_clk(void)
-{
- if (IS_ERR(fuse_clk))
- fuse_clk = clk_get_sys(NULL, "fuse");
- if (IS_ERR(fuse_clk))
- return;
- clk_prepare_enable(fuse_clk);
-}
-
-static void tegra_fuse_disable_clk(void)
-{
- if (IS_ERR(fuse_clk))
- return;
- clk_disable_unprepare(fuse_clk);
-}
-
-u32 tegra_fuse_readl(unsigned long offset)
-{
- return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
-}
-
-bool tegra_spare_fuse(int bit)
-{
- bool ret;
-
- tegra_fuse_enable_clk();
-
- ret = tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
-
- tegra_fuse_disable_clk();
-
- return ret;
-}
-
-static enum tegra_revision tegra_get_revision(u32 id)
-{
- u32 minor_rev = (id >> 16) & 0xf;
-
- switch (minor_rev) {
- case 1:
- return TEGRA_REVISION_A01;
- case 2:
- return TEGRA_REVISION_A02;
- case 3:
- if (tegra_chip_id == TEGRA20 &&
- (tegra_spare_fuse(18) || tegra_spare_fuse(19)))
- return TEGRA_REVISION_A03p;
- else
- return TEGRA_REVISION_A03;
- case 4:
- return TEGRA_REVISION_A04;
- default:
- return TEGRA_REVISION_UNKNOWN;
- }
-}
-
-static void tegra_get_process_id(void)
-{
- u32 reg;
-
- tegra_fuse_enable_clk();
-
- reg = tegra_fuse_readl(tegra_fuse_spare_bit);
- tegra_cpu_process_id = (reg >> 6) & 3;
- reg = tegra_fuse_readl(tegra_fuse_spare_bit);
- tegra_core_process_id = (reg >> 12) & 3;
-
- tegra_fuse_disable_clk();
-}
-
-u32 tegra_read_chipid(void)
-{
- return readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
-}
-
-static void __init tegra20_fuse_init_randomness(void)
-{
- u32 randomness[2];
-
- randomness[0] = tegra_fuse_readl(FUSE_UID_LOW);
- randomness[1] = tegra_fuse_readl(FUSE_UID_HIGH);
-
- add_device_randomness(randomness, sizeof(randomness));
-}
-
-/* Applies to Tegra30 or later */
-static void __init tegra30_fuse_init_randomness(void)
-{
- u32 randomness[7];
-
- randomness[0] = tegra_fuse_readl(FUSE_VENDOR_CODE);
- randomness[1] = tegra_fuse_readl(FUSE_FAB_CODE);
- randomness[2] = tegra_fuse_readl(FUSE_LOT_CODE_0);
- randomness[3] = tegra_fuse_readl(FUSE_LOT_CODE_1);
- randomness[4] = tegra_fuse_readl(FUSE_WAFER_ID);
- randomness[5] = tegra_fuse_readl(FUSE_X_COORDINATE);
- randomness[6] = tegra_fuse_readl(FUSE_Y_COORDINATE);
-
- add_device_randomness(randomness, sizeof(randomness));
-}
-
-void __init tegra_init_fuse(void)
-{
- u32 id;
- u32 randomness[5];
-
- u32 reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
- reg |= 1 << 28;
- writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
-
- /*
- * Enable FUSE clock. This needs to be hardcoded because the clock
- * subsystem is not active during early boot.
- */
- reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
- reg |= 1 << 7;
- writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
- fuse_clk = ERR_PTR(-EINVAL);
-
- reg = tegra_fuse_readl(FUSE_SKU_INFO);
- randomness[0] = reg;
- tegra_sku_id = reg & 0xFF;
-
- reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
- randomness[1] = reg;
- tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
-
- id = tegra_read_chipid();
- randomness[2] = id;
- tegra_chip_id = (id >> 8) & 0xff;
-
- switch (tegra_chip_id) {
- case TEGRA20:
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra20_init_speedo_data;
- break;
- case TEGRA30:
- tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra30_init_speedo_data;
- break;
- case TEGRA114:
- tegra_init_speedo_data = &tegra114_init_speedo_data;
- break;
- default:
- pr_warn("Tegra: unknown chip id %d\n", tegra_chip_id);
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra_get_process_id;
- }
-
- tegra_revision = tegra_get_revision(id);
- tegra_init_speedo_data();
- randomness[3] = (tegra_cpu_process_id << 16) | tegra_core_process_id;
- randomness[4] = (tegra_cpu_speedo_id << 16) | tegra_soc_speedo_id;
-
- add_device_randomness(randomness, sizeof(randomness));
- switch (tegra_chip_id) {
- case TEGRA20:
- tegra20_fuse_init_randomness();
- break;
- case TEGRA30:
- case TEGRA114:
- default:
- tegra30_fuse_init_randomness();
- break;
- }
-
- pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
- tegra_revision_name[tegra_revision],
- tegra_sku_id, tegra_cpu_process_id,
- tegra_core_process_id);
-}
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
deleted file mode 100644
index b17c4ba..0000000
--- a/arch/arm/mach-tegra/fuse.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright (C) 2010 Google, Inc.
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * Author:
- * Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __MACH_TEGRA_FUSE_H
-#define __MACH_TEGRA_FUSE_H
-
-#define SKU_ID_T20 8
-#define SKU_ID_T25SE 20
-#define SKU_ID_AP25 23
-#define SKU_ID_T25 24
-#define SKU_ID_AP25E 27
-#define SKU_ID_T25E 28
-
-#ifndef __ASSEMBLY__
-
-extern int tegra_sku_id;
-extern int tegra_cpu_process_id;
-extern int tegra_core_process_id;
-extern int tegra_chip_id;
-extern int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
-extern int tegra_soc_speedo_id;
-
-unsigned long long tegra_chip_uid(void);
-bool tegra_spare_fuse(int bit);
-u32 tegra_fuse_readl(unsigned long offset);
-
-#ifdef CONFIG_ARCH_TEGRA_2x_SOC
-void tegra20_init_speedo_data(void);
-#else
-static inline void tegra20_init_speedo_data(void) {}
-#endif
-
-#ifdef CONFIG_ARCH_TEGRA_3x_SOC
-void tegra30_init_speedo_data(void);
-#else
-static inline void tegra30_init_speedo_data(void) {}
-#endif
-
-#ifdef CONFIG_ARCH_TEGRA_114_SOC
-void tegra114_init_speedo_data(void);
-#else
-static inline void tegra114_init_speedo_data(void) {}
-#endif
-#endif /* __ASSEMBLY__ */
-
-#endif
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index e48b271..093d5f4 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -131,7 +131,8 @@ static void __init tegra_dt_init(void)
goto out;
soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");
- soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_revision);
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d",
+ tegra_sku_info.revision);
soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%d", tegra_chip_id);
soc_dev = soc_device_register(soc_dev_attr);
diff --git a/arch/arm/mach-tegra/tegra114_speedo.c b/arch/arm/mach-tegra/tegra114_speedo.c
deleted file mode 100644
index 7c73716..0000000
--- a/arch/arm/mach-tegra/tegra114_speedo.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CORE_PROCESS_CORNERS_NUM 2
-#define CPU_PROCESS_CORNERS_NUM 2
-
-enum {
- THRESHOLD_INDEX_0,
- THRESHOLD_INDEX_1,
- THRESHOLD_INDEX_COUNT,
-};
-
-static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
- {1123, UINT_MAX},
- {0, UINT_MAX},
-};
-
-static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
- {1695, UINT_MAX},
- {0, UINT_MAX},
-};
-
-static void rev_sku_to_speedo_ids(int rev, int sku, int *threshold)
-{
- u32 tmp;
-
- switch (sku) {
- case 0x00:
- case 0x10:
- case 0x05:
- case 0x06:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 0;
- *threshold = THRESHOLD_INDEX_0;
- break;
-
- case 0x03:
- case 0x04:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 1;
- *threshold = THRESHOLD_INDEX_1;
- break;
-
- default:
- pr_err("Tegra114 Unknown SKU %d\n", sku);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- *threshold = THRESHOLD_INDEX_0;
- break;
- }
-
- if (rev == TEGRA_REVISION_A01) {
- tmp = tegra_fuse_readl(0x270) << 1;
- tmp |= tegra_fuse_readl(0x26c);
- if (!tmp)
- tegra_cpu_speedo_id = 0;
- }
-}
-
-void tegra114_init_speedo_data(void)
-{
- u32 cpu_speedo_val;
- u32 core_speedo_val;
- int threshold;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
-
- rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id, &threshold);
-
- cpu_speedo_val = tegra_fuse_readl(0x12c) + 1024;
- core_speedo_val = tegra_fuse_readl(0x134);
-
- for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++)
- if (cpu_speedo_val < cpu_process_speedos[threshold][i])
- break;
- tegra_cpu_process_id = i;
-
- for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++)
- if (core_speedo_val < core_process_speedos[threshold][i])
- break;
- tegra_core_process_id = i;
-}
diff --git a/arch/arm/mach-tegra/tegra20_speedo.c b/arch/arm/mach-tegra/tegra20_speedo.c
deleted file mode 100644
index 3b1bb53..0000000
--- a/arch/arm/mach-tegra/tegra20_speedo.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CPU_SPEEDO_LSBIT 20
-#define CPU_SPEEDO_MSBIT 29
-#define CPU_SPEEDO_REDUND_LSBIT 30
-#define CPU_SPEEDO_REDUND_MSBIT 39
-#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT)
-
-#define CORE_SPEEDO_LSBIT 40
-#define CORE_SPEEDO_MSBIT 47
-#define CORE_SPEEDO_REDUND_LSBIT 48
-#define CORE_SPEEDO_REDUND_MSBIT 55
-#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT)
-
-#define SPEEDO_MULT 4
-
-#define PROCESS_CORNERS_NUM 4
-
-#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2)
-#define SPEEDO_ID_SELECT_1(sku) \
- (((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \
- ((sku) != 27) && ((sku) != 28))
-
-enum {
- SPEEDO_ID_0,
- SPEEDO_ID_1,
- SPEEDO_ID_2,
- SPEEDO_ID_COUNT,
-};
-
-static const u32 cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
- {315, 366, 420, UINT_MAX},
- {303, 368, 419, UINT_MAX},
- {316, 331, 383, UINT_MAX},
-};
-
-static const u32 core_process_speedos[][PROCESS_CORNERS_NUM] = {
- {165, 195, 224, UINT_MAX},
- {165, 195, 224, UINT_MAX},
- {165, 195, 224, UINT_MAX},
-};
-
-void tegra20_init_speedo_data(void)
-{
- u32 reg;
- u32 val;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT);
-
- if (SPEEDO_ID_SELECT_0(tegra_revision))
- tegra_soc_speedo_id = SPEEDO_ID_0;
- else if (SPEEDO_ID_SELECT_1(tegra_sku_id))
- tegra_soc_speedo_id = SPEEDO_ID_1;
- else
- tegra_soc_speedo_id = SPEEDO_ID_2;
-
- val = 0;
- for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
- reg = tegra_spare_fuse(i) |
- tegra_spare_fuse(i + CPU_SPEEDO_REDUND_OFFS);
- val = (val << 1) | (reg & 0x1);
- }
- val = val * SPEEDO_MULT;
- pr_debug("%s CPU speedo value %u\n", __func__, val);
-
- for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
- if (val <= cpu_process_speedos[tegra_soc_speedo_id][i])
- break;
- }
- tegra_cpu_process_id = i;
-
- val = 0;
- for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) {
- reg = tegra_spare_fuse(i) |
- tegra_spare_fuse(i + CORE_SPEEDO_REDUND_OFFS);
- val = (val << 1) | (reg & 0x1);
- }
- val = val * SPEEDO_MULT;
- pr_debug("%s Core speedo value %u\n", __func__, val);
-
- for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
- if (val <= core_process_speedos[tegra_soc_speedo_id][i])
- break;
- }
- tegra_core_process_id = i;
-
- pr_info("Tegra20 Soc Speedo ID %d", tegra_soc_speedo_id);
-}
diff --git a/arch/arm/mach-tegra/tegra30_speedo.c b/arch/arm/mach-tegra/tegra30_speedo.c
deleted file mode 100644
index 81a958d..0000000
--- a/arch/arm/mach-tegra/tegra30_speedo.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CORE_PROCESS_CORNERS_NUM 1
-#define CPU_PROCESS_CORNERS_NUM 6
-
-#define FUSE_SPEEDO_CALIB_0 0x114
-#define FUSE_PACKAGE_INFO 0X1FC
-#define FUSE_TEST_PROG_VER 0X128
-
-#define G_SPEEDO_BIT_MINUS1 58
-#define G_SPEEDO_BIT_MINUS1_R 59
-#define G_SPEEDO_BIT_MINUS2 60
-#define G_SPEEDO_BIT_MINUS2_R 61
-#define LP_SPEEDO_BIT_MINUS1 62
-#define LP_SPEEDO_BIT_MINUS1_R 63
-#define LP_SPEEDO_BIT_MINUS2 64
-#define LP_SPEEDO_BIT_MINUS2_R 65
-
-enum {
- THRESHOLD_INDEX_0,
- THRESHOLD_INDEX_1,
- THRESHOLD_INDEX_2,
- THRESHOLD_INDEX_3,
- THRESHOLD_INDEX_4,
- THRESHOLD_INDEX_5,
- THRESHOLD_INDEX_6,
- THRESHOLD_INDEX_7,
- THRESHOLD_INDEX_8,
- THRESHOLD_INDEX_9,
- THRESHOLD_INDEX_10,
- THRESHOLD_INDEX_11,
- THRESHOLD_INDEX_COUNT,
-};
-
-static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
- {180},
- {170},
- {195},
- {180},
- {168},
- {192},
- {180},
- {170},
- {195},
- {180},
- {180},
- {180},
-};
-
-static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
- {306, 338, 360, 376, UINT_MAX},
- {295, 336, 358, 375, UINT_MAX},
- {325, 325, 358, 375, UINT_MAX},
- {325, 325, 358, 375, UINT_MAX},
- {292, 324, 348, 364, UINT_MAX},
- {324, 324, 348, 364, UINT_MAX},
- {324, 324, 348, 364, UINT_MAX},
- {295, 336, 358, 375, UINT_MAX},
- {358, 358, 358, 358, 397, UINT_MAX},
- {364, 364, 364, 364, 397, UINT_MAX},
- {295, 336, 358, 375, 391, UINT_MAX},
- {295, 336, 358, 375, 391, UINT_MAX},
-};
-
-static int threshold_index;
-static int package_id;
-
-static void fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
-{
- u32 reg;
- int ate_ver;
- int bit_minus1;
- int bit_minus2;
-
- reg = tegra_fuse_readl(FUSE_SPEEDO_CALIB_0);
-
- *speedo_lp = (reg & 0xFFFF) * 4;
- *speedo_g = ((reg >> 16) & 0xFFFF) * 4;
-
- ate_ver = tegra_fuse_readl(FUSE_TEST_PROG_VER);
- pr_info("%s: ATE prog ver %d.%d\n", __func__, ate_ver/10, ate_ver%10);
-
- if (ate_ver >= 26) {
- bit_minus1 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1);
- bit_minus1 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1_R);
- bit_minus2 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2);
- bit_minus2 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2_R);
- *speedo_lp |= (bit_minus1 << 1) | bit_minus2;
-
- bit_minus1 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS1);
- bit_minus1 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS1_R);
- bit_minus2 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS2);
- bit_minus2 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS2_R);
- *speedo_g |= (bit_minus1 << 1) | bit_minus2;
- } else {
- *speedo_lp |= 0x3;
- *speedo_g |= 0x3;
- }
-}
-
-static void rev_sku_to_speedo_ids(int rev, int sku)
-{
- switch (rev) {
- case TEGRA_REVISION_A01:
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- case TEGRA_REVISION_A02:
- case TEGRA_REVISION_A03:
- switch (sku) {
- case 0x87:
- case 0x82:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_1;
- break;
- case 0x81:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_2;
- break;
- case 2:
- tegra_cpu_speedo_id = 4;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_7;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x80:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 5;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_8;
- break;
- case 2:
- tegra_cpu_speedo_id = 6;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_9;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x83:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 7;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_10;
- break;
- case 2:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_3;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x8F:
- tegra_cpu_speedo_id = 8;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_11;
- break;
- case 0x08:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_4;
- break;
- case 0x02:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_5;
- break;
- case 0x04:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_6;
- break;
- case 0:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_2;
- break;
- case 2:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_3;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- default:
- pr_warn("Tegra30: Unknown SKU %d\n", sku);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- }
- break;
- default:
- pr_warn("Tegra30: Unknown chip rev %d\n", rev);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- }
-}
-
-void tegra30_init_speedo_data(void)
-{
- u32 cpu_speedo_val;
- u32 core_speedo_val;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
-
- package_id = tegra_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
-
- rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id);
- fuse_speedo_calib(&cpu_speedo_val, &core_speedo_val);
- pr_debug("%s CPU speedo value %u\n", __func__, cpu_speedo_val);
- pr_debug("%s Core speedo value %u\n", __func__, core_speedo_val);
-
- for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) {
- if (cpu_speedo_val < cpu_process_speedos[threshold_index][i])
- break;
- }
- tegra_cpu_process_id = i - 1;
-
- if (tegra_cpu_process_id == -1) {
- pr_warn("Tegra30: CPU speedo value %3d out of range",
- cpu_speedo_val);
- tegra_cpu_process_id = 0;
- tegra_cpu_speedo_id = 1;
- }
-
- for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) {
- if (core_speedo_val < core_process_speedos[threshold_index][i])
- break;
- }
- tegra_core_process_id = i - 1;
-
- if (tegra_core_process_id == -1) {
- pr_warn("Tegra30: CORE speedo value %3d out of range",
- core_speedo_val);
- tegra_core_process_id = 0;
- tegra_soc_speedo_id = 1;
- }
-
- pr_info("Tegra30: CPU Speedo ID %d, Soc Speedo ID %d",
- tegra_cpu_speedo_id, tegra_soc_speedo_id);
-}
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 7eb4b69..ecb9349 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -55,3 +55,4 @@ obj-$(CONFIG_SRAM) += sram.o
obj-y += mic/
obj-$(CONFIG_GENWQE) += genwqe/
obj-$(CONFIG_ECHO) += echo/
+obj-y += fuse/
diff --git a/drivers/misc/fuse/tegra/fuse-tegra.c b/drivers/misc/fuse/tegra/fuse-tegra.c
index 3fa6f74..934073e 100644
--- a/drivers/misc/fuse/tegra/fuse-tegra.c
+++ b/drivers/misc/fuse/tegra/fuse-tegra.c
@@ -98,6 +98,16 @@ static void tegra_enable_fuse_clk(void __iomem *base)
writel(reg, base + 0x14);
}
+int tegra_fuse_readl(u32 offset, u32 *val)
+{
+ if (!fuse_readl)
+ return -EPROBE_DEFER;
+
+ *val = fuse_readl(offset);
+
+ return 0;
+}
+
int tegra_fuse_create_sysfs(struct device *dev, int size,
u32 (*readl)(const unsigned int offset))
{
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 5c33b16..1ca3756 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -54,9 +54,9 @@ struct tegra_sku_info {
u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
void tegra_init_fuse(void);
+int tegra_fuse_readl(u32 offset, u32 *val);
extern int tegra_chip_id;
-extern enum tegra_revision tegra_revision;
extern struct tegra_sku_info tegra_sku_info;
#if defined(CONFIG_TEGRA20_APB_DMA)
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 5/6] ARM: tegra: build new fuse driver in drivers/misc
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Russell King, Stephen Warren, Thierry Reding, Arnd Bergmann,
Greg Kroah-Hartman, Joseph Lo, Bjorn Helgaas, Alexandre Courbot,
Olof Johansson, Linus Walleij, Herbert Xu, Sebastian Hesselbarth,
Tuomas Tynkkynen, linux-arm-kernel, linux-tegra, linux-kernel
The Tegra fuse code has moved to drivers/misc/fuse/tegra. Enable the
building of that code, and disable the building of the old fuse code in
arch/arm/mach-tegra/. Also move the only user of tegra_revision over to
tegra_sku_info.revision and export tegra_fuse_readl to allow drivers to read
calibration fuses.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
arch/arm/mach-tegra/Makefile | 4 -
arch/arm/mach-tegra/fuse.c | 252 ----------------------------
arch/arm/mach-tegra/fuse.h | 61 -------
arch/arm/mach-tegra/tegra.c | 3 +-
arch/arm/mach-tegra/tegra114_speedo.c | 105 ------------
arch/arm/mach-tegra/tegra20_speedo.c | 110 ------------
arch/arm/mach-tegra/tegra30_speedo.c | 293 ---------------------------------
drivers/misc/Makefile | 1 +
drivers/misc/fuse/tegra/fuse-tegra.c | 10 +
include/linux/tegra-soc.h | 2 +-
10 files changed, 14 insertions(+), 827 deletions(-)
delete mode 100644 arch/arm/mach-tegra/fuse.c
delete mode 100644 arch/arm/mach-tegra/fuse.h
delete mode 100644 arch/arm/mach-tegra/tegra114_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra20_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra30_speedo.c
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 6fbfbb7..e8601bb 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -2,7 +2,6 @@ asflags-y += -march=armv7-a
obj-y += io.o
obj-y += irq.o
-obj-y += fuse.o
obj-y += pmc.o
obj-y += flowctrl.o
obj-y += powergate.o
@@ -13,13 +12,11 @@ obj-y += reset-handler.o
obj-y += sleep.o
obj-y += tegra.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
-obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += sleep-tegra20.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += pm-tegra20.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += cpuidle-tegra20.o
endif
-obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_speedo.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += sleep-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
@@ -28,7 +25,6 @@ endif
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
-obj-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114_speedo.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += sleep-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
deleted file mode 100644
index c9ac23b..0000000
--- a/arch/arm/mach-tegra/fuse.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/*
- * arch/arm/mach-tegra/fuse.c
- *
- * Copyright (C) 2010 Google, Inc.
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * Author:
- * Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/export.h>
-#include <linux/random.h>
-#include <linux/clk.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-#include "iomap.h"
-#include "apbio.h"
-
-/* Tegra20 only */
-#define FUSE_UID_LOW 0x108
-#define FUSE_UID_HIGH 0x10c
-
-/* Tegra30 and later */
-#define FUSE_VENDOR_CODE 0x200
-#define FUSE_FAB_CODE 0x204
-#define FUSE_LOT_CODE_0 0x208
-#define FUSE_LOT_CODE_1 0x20c
-#define FUSE_WAFER_ID 0x210
-#define FUSE_X_COORDINATE 0x214
-#define FUSE_Y_COORDINATE 0x218
-
-#define FUSE_SKU_INFO 0x110
-
-#define TEGRA20_FUSE_SPARE_BIT 0x200
-#define TEGRA30_FUSE_SPARE_BIT 0x244
-
-int tegra_sku_id;
-int tegra_cpu_process_id;
-int tegra_core_process_id;
-int tegra_chip_id;
-int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
-int tegra_soc_speedo_id;
-enum tegra_revision tegra_revision;
-
-static struct clk *fuse_clk;
-static int tegra_fuse_spare_bit;
-static void (*tegra_init_speedo_data)(void);
-
-/* The BCT to use at boot is specified by board straps that can be read
- * through a APB misc register and decoded. 2 bits, i.e. 4 possible BCTs.
- */
-int tegra_bct_strapping;
-
-#define STRAP_OPT 0x008
-#define GMI_AD0 (1 << 4)
-#define GMI_AD1 (1 << 5)
-#define RAM_ID_MASK (GMI_AD0 | GMI_AD1)
-#define RAM_CODE_SHIFT 4
-
-static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
- [TEGRA_REVISION_UNKNOWN] = "unknown",
- [TEGRA_REVISION_A01] = "A01",
- [TEGRA_REVISION_A02] = "A02",
- [TEGRA_REVISION_A03] = "A03",
- [TEGRA_REVISION_A03p] = "A03 prime",
- [TEGRA_REVISION_A04] = "A04",
-};
-
-static void tegra_fuse_enable_clk(void)
-{
- if (IS_ERR(fuse_clk))
- fuse_clk = clk_get_sys(NULL, "fuse");
- if (IS_ERR(fuse_clk))
- return;
- clk_prepare_enable(fuse_clk);
-}
-
-static void tegra_fuse_disable_clk(void)
-{
- if (IS_ERR(fuse_clk))
- return;
- clk_disable_unprepare(fuse_clk);
-}
-
-u32 tegra_fuse_readl(unsigned long offset)
-{
- return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
-}
-
-bool tegra_spare_fuse(int bit)
-{
- bool ret;
-
- tegra_fuse_enable_clk();
-
- ret = tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
-
- tegra_fuse_disable_clk();
-
- return ret;
-}
-
-static enum tegra_revision tegra_get_revision(u32 id)
-{
- u32 minor_rev = (id >> 16) & 0xf;
-
- switch (minor_rev) {
- case 1:
- return TEGRA_REVISION_A01;
- case 2:
- return TEGRA_REVISION_A02;
- case 3:
- if (tegra_chip_id == TEGRA20 &&
- (tegra_spare_fuse(18) || tegra_spare_fuse(19)))
- return TEGRA_REVISION_A03p;
- else
- return TEGRA_REVISION_A03;
- case 4:
- return TEGRA_REVISION_A04;
- default:
- return TEGRA_REVISION_UNKNOWN;
- }
-}
-
-static void tegra_get_process_id(void)
-{
- u32 reg;
-
- tegra_fuse_enable_clk();
-
- reg = tegra_fuse_readl(tegra_fuse_spare_bit);
- tegra_cpu_process_id = (reg >> 6) & 3;
- reg = tegra_fuse_readl(tegra_fuse_spare_bit);
- tegra_core_process_id = (reg >> 12) & 3;
-
- tegra_fuse_disable_clk();
-}
-
-u32 tegra_read_chipid(void)
-{
- return readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
-}
-
-static void __init tegra20_fuse_init_randomness(void)
-{
- u32 randomness[2];
-
- randomness[0] = tegra_fuse_readl(FUSE_UID_LOW);
- randomness[1] = tegra_fuse_readl(FUSE_UID_HIGH);
-
- add_device_randomness(randomness, sizeof(randomness));
-}
-
-/* Applies to Tegra30 or later */
-static void __init tegra30_fuse_init_randomness(void)
-{
- u32 randomness[7];
-
- randomness[0] = tegra_fuse_readl(FUSE_VENDOR_CODE);
- randomness[1] = tegra_fuse_readl(FUSE_FAB_CODE);
- randomness[2] = tegra_fuse_readl(FUSE_LOT_CODE_0);
- randomness[3] = tegra_fuse_readl(FUSE_LOT_CODE_1);
- randomness[4] = tegra_fuse_readl(FUSE_WAFER_ID);
- randomness[5] = tegra_fuse_readl(FUSE_X_COORDINATE);
- randomness[6] = tegra_fuse_readl(FUSE_Y_COORDINATE);
-
- add_device_randomness(randomness, sizeof(randomness));
-}
-
-void __init tegra_init_fuse(void)
-{
- u32 id;
- u32 randomness[5];
-
- u32 reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
- reg |= 1 << 28;
- writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
-
- /*
- * Enable FUSE clock. This needs to be hardcoded because the clock
- * subsystem is not active during early boot.
- */
- reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
- reg |= 1 << 7;
- writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
- fuse_clk = ERR_PTR(-EINVAL);
-
- reg = tegra_fuse_readl(FUSE_SKU_INFO);
- randomness[0] = reg;
- tegra_sku_id = reg & 0xFF;
-
- reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
- randomness[1] = reg;
- tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
-
- id = tegra_read_chipid();
- randomness[2] = id;
- tegra_chip_id = (id >> 8) & 0xff;
-
- switch (tegra_chip_id) {
- case TEGRA20:
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra20_init_speedo_data;
- break;
- case TEGRA30:
- tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra30_init_speedo_data;
- break;
- case TEGRA114:
- tegra_init_speedo_data = &tegra114_init_speedo_data;
- break;
- default:
- pr_warn("Tegra: unknown chip id %d\n", tegra_chip_id);
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra_get_process_id;
- }
-
- tegra_revision = tegra_get_revision(id);
- tegra_init_speedo_data();
- randomness[3] = (tegra_cpu_process_id << 16) | tegra_core_process_id;
- randomness[4] = (tegra_cpu_speedo_id << 16) | tegra_soc_speedo_id;
-
- add_device_randomness(randomness, sizeof(randomness));
- switch (tegra_chip_id) {
- case TEGRA20:
- tegra20_fuse_init_randomness();
- break;
- case TEGRA30:
- case TEGRA114:
- default:
- tegra30_fuse_init_randomness();
- break;
- }
-
- pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
- tegra_revision_name[tegra_revision],
- tegra_sku_id, tegra_cpu_process_id,
- tegra_core_process_id);
-}
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
deleted file mode 100644
index b17c4ba..0000000
--- a/arch/arm/mach-tegra/fuse.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright (C) 2010 Google, Inc.
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * Author:
- * Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __MACH_TEGRA_FUSE_H
-#define __MACH_TEGRA_FUSE_H
-
-#define SKU_ID_T20 8
-#define SKU_ID_T25SE 20
-#define SKU_ID_AP25 23
-#define SKU_ID_T25 24
-#define SKU_ID_AP25E 27
-#define SKU_ID_T25E 28
-
-#ifndef __ASSEMBLY__
-
-extern int tegra_sku_id;
-extern int tegra_cpu_process_id;
-extern int tegra_core_process_id;
-extern int tegra_chip_id;
-extern int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
-extern int tegra_soc_speedo_id;
-
-unsigned long long tegra_chip_uid(void);
-bool tegra_spare_fuse(int bit);
-u32 tegra_fuse_readl(unsigned long offset);
-
-#ifdef CONFIG_ARCH_TEGRA_2x_SOC
-void tegra20_init_speedo_data(void);
-#else
-static inline void tegra20_init_speedo_data(void) {}
-#endif
-
-#ifdef CONFIG_ARCH_TEGRA_3x_SOC
-void tegra30_init_speedo_data(void);
-#else
-static inline void tegra30_init_speedo_data(void) {}
-#endif
-
-#ifdef CONFIG_ARCH_TEGRA_114_SOC
-void tegra114_init_speedo_data(void);
-#else
-static inline void tegra114_init_speedo_data(void) {}
-#endif
-#endif /* __ASSEMBLY__ */
-
-#endif
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index e48b271..093d5f4 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -131,7 +131,8 @@ static void __init tegra_dt_init(void)
goto out;
soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");
- soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_revision);
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d",
+ tegra_sku_info.revision);
soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%d", tegra_chip_id);
soc_dev = soc_device_register(soc_dev_attr);
diff --git a/arch/arm/mach-tegra/tegra114_speedo.c b/arch/arm/mach-tegra/tegra114_speedo.c
deleted file mode 100644
index 7c73716..0000000
--- a/arch/arm/mach-tegra/tegra114_speedo.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CORE_PROCESS_CORNERS_NUM 2
-#define CPU_PROCESS_CORNERS_NUM 2
-
-enum {
- THRESHOLD_INDEX_0,
- THRESHOLD_INDEX_1,
- THRESHOLD_INDEX_COUNT,
-};
-
-static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
- {1123, UINT_MAX},
- {0, UINT_MAX},
-};
-
-static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
- {1695, UINT_MAX},
- {0, UINT_MAX},
-};
-
-static void rev_sku_to_speedo_ids(int rev, int sku, int *threshold)
-{
- u32 tmp;
-
- switch (sku) {
- case 0x00:
- case 0x10:
- case 0x05:
- case 0x06:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 0;
- *threshold = THRESHOLD_INDEX_0;
- break;
-
- case 0x03:
- case 0x04:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 1;
- *threshold = THRESHOLD_INDEX_1;
- break;
-
- default:
- pr_err("Tegra114 Unknown SKU %d\n", sku);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- *threshold = THRESHOLD_INDEX_0;
- break;
- }
-
- if (rev == TEGRA_REVISION_A01) {
- tmp = tegra_fuse_readl(0x270) << 1;
- tmp |= tegra_fuse_readl(0x26c);
- if (!tmp)
- tegra_cpu_speedo_id = 0;
- }
-}
-
-void tegra114_init_speedo_data(void)
-{
- u32 cpu_speedo_val;
- u32 core_speedo_val;
- int threshold;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
-
- rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id, &threshold);
-
- cpu_speedo_val = tegra_fuse_readl(0x12c) + 1024;
- core_speedo_val = tegra_fuse_readl(0x134);
-
- for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++)
- if (cpu_speedo_val < cpu_process_speedos[threshold][i])
- break;
- tegra_cpu_process_id = i;
-
- for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++)
- if (core_speedo_val < core_process_speedos[threshold][i])
- break;
- tegra_core_process_id = i;
-}
diff --git a/arch/arm/mach-tegra/tegra20_speedo.c b/arch/arm/mach-tegra/tegra20_speedo.c
deleted file mode 100644
index 3b1bb53..0000000
--- a/arch/arm/mach-tegra/tegra20_speedo.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CPU_SPEEDO_LSBIT 20
-#define CPU_SPEEDO_MSBIT 29
-#define CPU_SPEEDO_REDUND_LSBIT 30
-#define CPU_SPEEDO_REDUND_MSBIT 39
-#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT)
-
-#define CORE_SPEEDO_LSBIT 40
-#define CORE_SPEEDO_MSBIT 47
-#define CORE_SPEEDO_REDUND_LSBIT 48
-#define CORE_SPEEDO_REDUND_MSBIT 55
-#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT)
-
-#define SPEEDO_MULT 4
-
-#define PROCESS_CORNERS_NUM 4
-
-#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2)
-#define SPEEDO_ID_SELECT_1(sku) \
- (((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \
- ((sku) != 27) && ((sku) != 28))
-
-enum {
- SPEEDO_ID_0,
- SPEEDO_ID_1,
- SPEEDO_ID_2,
- SPEEDO_ID_COUNT,
-};
-
-static const u32 cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
- {315, 366, 420, UINT_MAX},
- {303, 368, 419, UINT_MAX},
- {316, 331, 383, UINT_MAX},
-};
-
-static const u32 core_process_speedos[][PROCESS_CORNERS_NUM] = {
- {165, 195, 224, UINT_MAX},
- {165, 195, 224, UINT_MAX},
- {165, 195, 224, UINT_MAX},
-};
-
-void tegra20_init_speedo_data(void)
-{
- u32 reg;
- u32 val;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT);
-
- if (SPEEDO_ID_SELECT_0(tegra_revision))
- tegra_soc_speedo_id = SPEEDO_ID_0;
- else if (SPEEDO_ID_SELECT_1(tegra_sku_id))
- tegra_soc_speedo_id = SPEEDO_ID_1;
- else
- tegra_soc_speedo_id = SPEEDO_ID_2;
-
- val = 0;
- for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
- reg = tegra_spare_fuse(i) |
- tegra_spare_fuse(i + CPU_SPEEDO_REDUND_OFFS);
- val = (val << 1) | (reg & 0x1);
- }
- val = val * SPEEDO_MULT;
- pr_debug("%s CPU speedo value %u\n", __func__, val);
-
- for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
- if (val <= cpu_process_speedos[tegra_soc_speedo_id][i])
- break;
- }
- tegra_cpu_process_id = i;
-
- val = 0;
- for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) {
- reg = tegra_spare_fuse(i) |
- tegra_spare_fuse(i + CORE_SPEEDO_REDUND_OFFS);
- val = (val << 1) | (reg & 0x1);
- }
- val = val * SPEEDO_MULT;
- pr_debug("%s Core speedo value %u\n", __func__, val);
-
- for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
- if (val <= core_process_speedos[tegra_soc_speedo_id][i])
- break;
- }
- tegra_core_process_id = i;
-
- pr_info("Tegra20 Soc Speedo ID %d", tegra_soc_speedo_id);
-}
diff --git a/arch/arm/mach-tegra/tegra30_speedo.c b/arch/arm/mach-tegra/tegra30_speedo.c
deleted file mode 100644
index 81a958d..0000000
--- a/arch/arm/mach-tegra/tegra30_speedo.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/tegra-soc.h>
-
-#include "fuse.h"
-
-#define CORE_PROCESS_CORNERS_NUM 1
-#define CPU_PROCESS_CORNERS_NUM 6
-
-#define FUSE_SPEEDO_CALIB_0 0x114
-#define FUSE_PACKAGE_INFO 0X1FC
-#define FUSE_TEST_PROG_VER 0X128
-
-#define G_SPEEDO_BIT_MINUS1 58
-#define G_SPEEDO_BIT_MINUS1_R 59
-#define G_SPEEDO_BIT_MINUS2 60
-#define G_SPEEDO_BIT_MINUS2_R 61
-#define LP_SPEEDO_BIT_MINUS1 62
-#define LP_SPEEDO_BIT_MINUS1_R 63
-#define LP_SPEEDO_BIT_MINUS2 64
-#define LP_SPEEDO_BIT_MINUS2_R 65
-
-enum {
- THRESHOLD_INDEX_0,
- THRESHOLD_INDEX_1,
- THRESHOLD_INDEX_2,
- THRESHOLD_INDEX_3,
- THRESHOLD_INDEX_4,
- THRESHOLD_INDEX_5,
- THRESHOLD_INDEX_6,
- THRESHOLD_INDEX_7,
- THRESHOLD_INDEX_8,
- THRESHOLD_INDEX_9,
- THRESHOLD_INDEX_10,
- THRESHOLD_INDEX_11,
- THRESHOLD_INDEX_COUNT,
-};
-
-static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
- {180},
- {170},
- {195},
- {180},
- {168},
- {192},
- {180},
- {170},
- {195},
- {180},
- {180},
- {180},
-};
-
-static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
- {306, 338, 360, 376, UINT_MAX},
- {295, 336, 358, 375, UINT_MAX},
- {325, 325, 358, 375, UINT_MAX},
- {325, 325, 358, 375, UINT_MAX},
- {292, 324, 348, 364, UINT_MAX},
- {324, 324, 348, 364, UINT_MAX},
- {324, 324, 348, 364, UINT_MAX},
- {295, 336, 358, 375, UINT_MAX},
- {358, 358, 358, 358, 397, UINT_MAX},
- {364, 364, 364, 364, 397, UINT_MAX},
- {295, 336, 358, 375, 391, UINT_MAX},
- {295, 336, 358, 375, 391, UINT_MAX},
-};
-
-static int threshold_index;
-static int package_id;
-
-static void fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
-{
- u32 reg;
- int ate_ver;
- int bit_minus1;
- int bit_minus2;
-
- reg = tegra_fuse_readl(FUSE_SPEEDO_CALIB_0);
-
- *speedo_lp = (reg & 0xFFFF) * 4;
- *speedo_g = ((reg >> 16) & 0xFFFF) * 4;
-
- ate_ver = tegra_fuse_readl(FUSE_TEST_PROG_VER);
- pr_info("%s: ATE prog ver %d.%d\n", __func__, ate_ver/10, ate_ver%10);
-
- if (ate_ver >= 26) {
- bit_minus1 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1);
- bit_minus1 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1_R);
- bit_minus2 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2);
- bit_minus2 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2_R);
- *speedo_lp |= (bit_minus1 << 1) | bit_minus2;
-
- bit_minus1 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS1);
- bit_minus1 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS1_R);
- bit_minus2 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS2);
- bit_minus2 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS2_R);
- *speedo_g |= (bit_minus1 << 1) | bit_minus2;
- } else {
- *speedo_lp |= 0x3;
- *speedo_g |= 0x3;
- }
-}
-
-static void rev_sku_to_speedo_ids(int rev, int sku)
-{
- switch (rev) {
- case TEGRA_REVISION_A01:
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- case TEGRA_REVISION_A02:
- case TEGRA_REVISION_A03:
- switch (sku) {
- case 0x87:
- case 0x82:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_1;
- break;
- case 0x81:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_2;
- break;
- case 2:
- tegra_cpu_speedo_id = 4;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_7;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x80:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 5;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_8;
- break;
- case 2:
- tegra_cpu_speedo_id = 6;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_9;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x83:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 7;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_10;
- break;
- case 2:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_3;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- case 0x8F:
- tegra_cpu_speedo_id = 8;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_11;
- break;
- case 0x08:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 1;
- threshold_index = THRESHOLD_INDEX_4;
- break;
- case 0x02:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_5;
- break;
- case 0x04:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_6;
- break;
- case 0:
- switch (package_id) {
- case 1:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_2;
- break;
- case 2:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
- threshold_index = THRESHOLD_INDEX_3;
- break;
- default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
- break;
- }
- break;
- default:
- pr_warn("Tegra30: Unknown SKU %d\n", sku);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- }
- break;
- default:
- pr_warn("Tegra30: Unknown chip rev %d\n", rev);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
- threshold_index = THRESHOLD_INDEX_0;
- break;
- }
-}
-
-void tegra30_init_speedo_data(void)
-{
- u32 cpu_speedo_val;
- u32 core_speedo_val;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
- BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
- THRESHOLD_INDEX_COUNT);
-
- package_id = tegra_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
-
- rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id);
- fuse_speedo_calib(&cpu_speedo_val, &core_speedo_val);
- pr_debug("%s CPU speedo value %u\n", __func__, cpu_speedo_val);
- pr_debug("%s Core speedo value %u\n", __func__, core_speedo_val);
-
- for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) {
- if (cpu_speedo_val < cpu_process_speedos[threshold_index][i])
- break;
- }
- tegra_cpu_process_id = i - 1;
-
- if (tegra_cpu_process_id == -1) {
- pr_warn("Tegra30: CPU speedo value %3d out of range",
- cpu_speedo_val);
- tegra_cpu_process_id = 0;
- tegra_cpu_speedo_id = 1;
- }
-
- for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) {
- if (core_speedo_val < core_process_speedos[threshold_index][i])
- break;
- }
- tegra_core_process_id = i - 1;
-
- if (tegra_core_process_id == -1) {
- pr_warn("Tegra30: CORE speedo value %3d out of range",
- core_speedo_val);
- tegra_core_process_id = 0;
- tegra_soc_speedo_id = 1;
- }
-
- pr_info("Tegra30: CPU Speedo ID %d, Soc Speedo ID %d",
- tegra_cpu_speedo_id, tegra_soc_speedo_id);
-}
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 7eb4b69..ecb9349 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -55,3 +55,4 @@ obj-$(CONFIG_SRAM) += sram.o
obj-y += mic/
obj-$(CONFIG_GENWQE) += genwqe/
obj-$(CONFIG_ECHO) += echo/
+obj-y += fuse/
diff --git a/drivers/misc/fuse/tegra/fuse-tegra.c b/drivers/misc/fuse/tegra/fuse-tegra.c
index 3fa6f74..934073e 100644
--- a/drivers/misc/fuse/tegra/fuse-tegra.c
+++ b/drivers/misc/fuse/tegra/fuse-tegra.c
@@ -98,6 +98,16 @@ static void tegra_enable_fuse_clk(void __iomem *base)
writel(reg, base + 0x14);
}
+int tegra_fuse_readl(u32 offset, u32 *val)
+{
+ if (!fuse_readl)
+ return -EPROBE_DEFER;
+
+ *val = fuse_readl(offset);
+
+ return 0;
+}
+
int tegra_fuse_create_sysfs(struct device *dev, int size,
u32 (*readl)(const unsigned int offset))
{
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 5c33b16..1ca3756 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -54,9 +54,9 @@ struct tegra_sku_info {
u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
void tegra_init_fuse(void);
+int tegra_fuse_readl(u32 offset, u32 *val);
extern int tegra_chip_id;
-extern enum tegra_revision tegra_revision;
extern struct tegra_sku_info tegra_sku_info;
#if defined(CONFIG_TEGRA20_APB_DMA)
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v8 6/6] misc: fuse: move APB DMA into Tegra20 fuse driver
2014-06-12 15:36 ` Peter De Schrijver
(?)
@ 2014-06-12 15:36 ` Peter De Schrijver
-1 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Russell King, Stephen Warren, Thierry Reding, Joseph Lo,
Bjorn Helgaas, Andrew Morton, Linus Walleij, Wolfram Sang,
Alexandre Courbot, Olof Johansson, Sebastian Hesselbarth,
Tuomas Tynkkynen,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
The Tegra20 fuse driver is the only user of tegra_apb_readl_using_dma().
Therefore we can simply the code by incorporating the APB DMA handling into
the driver directly. tegra_apb_writel_using_dma() is dropped because there
are no users.
Signed-off-by: Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
arch/arm/mach-tegra/Makefile | 1 -
arch/arm/mach-tegra/apbio.c | 217 --------------------------------
arch/arm/mach-tegra/apbio.h | 22 ----
arch/arm/mach-tegra/tegra.c | 2 -
drivers/misc/fuse/tegra/fuse-tegra20.c | 79 +++++++++++-
include/linux/tegra-soc.h | 14 --
6 files changed, 76 insertions(+), 259 deletions(-)
delete mode 100644 arch/arm/mach-tegra/apbio.c
delete mode 100644 arch/arm/mach-tegra/apbio.h
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index e8601bb..c303b55 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -5,7 +5,6 @@ obj-y += irq.o
obj-y += pmc.o
obj-y += flowctrl.o
obj-y += powergate.o
-obj-y += apbio.o
obj-y += pm.o
obj-y += reset.o
obj-y += reset-handler.o
diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c
deleted file mode 100644
index e0bf49d..0000000
--- a/arch/arm/mach-tegra/apbio.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * Copyright (C) 2010 NVIDIA Corporation.
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/sched.h>
-#include <linux/mutex.h>
-
-#include "apbio.h"
-#include "iomap.h"
-
-#if defined(CONFIG_TEGRA20_APB_DMA)
-static DEFINE_MUTEX(tegra_apb_dma_lock);
-static u32 *tegra_apb_bb;
-static dma_addr_t tegra_apb_bb_phys;
-static DECLARE_COMPLETION(tegra_apb_wait);
-
-static int tegra_apb_readl_direct(unsigned long offset, u32 *value);
-static int tegra_apb_writel_direct(u32 value, unsigned long offset);
-
-static struct dma_chan *tegra_apb_dma_chan;
-static struct dma_slave_config dma_sconfig;
-
-static bool tegra_apb_dma_init(void)
-{
- dma_cap_mask_t mask;
-
- mutex_lock(&tegra_apb_dma_lock);
-
- /* Check to see if we raced to setup */
- if (tegra_apb_dma_chan)
- goto skip_init;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- tegra_apb_dma_chan = dma_request_channel(mask, NULL, NULL);
- if (!tegra_apb_dma_chan) {
- /*
- * This is common until the device is probed, so don't
- * shout about it.
- */
- pr_debug("%s: can not allocate dma channel\n", __func__);
- goto err_dma_alloc;
- }
-
- tegra_apb_bb = dma_alloc_coherent(NULL, sizeof(u32),
- &tegra_apb_bb_phys, GFP_KERNEL);
- if (!tegra_apb_bb) {
- pr_err("%s: can not allocate bounce buffer\n", __func__);
- goto err_buff_alloc;
- }
-
- dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- dma_sconfig.src_maxburst = 1;
- dma_sconfig.dst_maxburst = 1;
-
-skip_init:
- mutex_unlock(&tegra_apb_dma_lock);
- return true;
-
-err_buff_alloc:
- dma_release_channel(tegra_apb_dma_chan);
- tegra_apb_dma_chan = NULL;
-
-err_dma_alloc:
- mutex_unlock(&tegra_apb_dma_lock);
- return false;
-}
-
-static void apb_dma_complete(void *args)
-{
- complete(&tegra_apb_wait);
-}
-
-static int do_dma_transfer(unsigned long apb_add,
- enum dma_transfer_direction dir)
-{
- struct dma_async_tx_descriptor *dma_desc;
- int ret;
-
- if (dir == DMA_DEV_TO_MEM)
- dma_sconfig.src_addr = apb_add;
- else
- dma_sconfig.dst_addr = apb_add;
-
- ret = dmaengine_slave_config(tegra_apb_dma_chan, &dma_sconfig);
- if (ret)
- return ret;
-
- dma_desc = dmaengine_prep_slave_single(tegra_apb_dma_chan,
- tegra_apb_bb_phys, sizeof(u32), dir,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
- if (!dma_desc)
- return -EINVAL;
-
- dma_desc->callback = apb_dma_complete;
- dma_desc->callback_param = NULL;
-
- reinit_completion(&tegra_apb_wait);
-
- dmaengine_submit(dma_desc);
- dma_async_issue_pending(tegra_apb_dma_chan);
- ret = wait_for_completion_timeout(&tegra_apb_wait,
- msecs_to_jiffies(50));
-
- if (WARN(ret == 0, "apb read dma timed out")) {
- dmaengine_terminate_all(tegra_apb_dma_chan);
- return -EFAULT;
- }
- return 0;
-}
-
-int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
-{
- int ret;
-
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_readl_direct(offset, value);
-
- mutex_lock(&tegra_apb_dma_lock);
- ret = do_dma_transfer(offset, DMA_DEV_TO_MEM);
- if (ret < 0)
- pr_err("error in reading offset 0x%08lx using dma\n", offset);
- else
- *value = *tegra_apb_bb;
-
- mutex_unlock(&tegra_apb_dma_lock);
-
- return ret;
-}
-
-int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
-{
- int ret;
-
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_writel_direct(value, offset);
-
- mutex_lock(&tegra_apb_dma_lock);
- *((u32 *)tegra_apb_bb) = value;
- ret = do_dma_transfer(offset, DMA_MEM_TO_DEV);
- mutex_unlock(&tegra_apb_dma_lock);
- if (ret < 0)
- pr_err("error in writing offset 0x%08lx using dma\n", offset);
-
- return ret;
-}
-#else
-#define tegra_apb_readl_using_dma tegra_apb_readl_direct
-#define tegra_apb_writel_using_dma tegra_apb_writel_direct
-#endif
-
-typedef int (*apbio_read_fptr)(unsigned long offset, u32 *value);
-typedef int (*apbio_write_fptr)(u32 value, unsigned long offset);
-
-static apbio_read_fptr apbio_read;
-static apbio_write_fptr apbio_write;
-
-static int tegra_apb_readl_direct(unsigned long offset, u32 *value)
-{
- *value = readl(IO_ADDRESS(offset));
-
- return 0;
-}
-
-static int tegra_apb_writel_direct(u32 value, unsigned long offset)
-{
- writel(value, IO_ADDRESS(offset));
-
- return 0;
-}
-
-void tegra_apb_io_init(void)
-{
- /* Need to use dma only when it is Tegra20 based platform */
- if (of_machine_is_compatible("nvidia,tegra20") ||
- !of_have_populated_dt()) {
- apbio_read = tegra_apb_readl_using_dma;
- apbio_write = tegra_apb_writel_using_dma;
- } else {
- apbio_read = tegra_apb_readl_direct;
- apbio_write = tegra_apb_writel_direct;
- }
-}
-
-u32 tegra_apb_readl(unsigned long offset)
-{
- u32 val;
-
- if (apbio_read(offset, &val) < 0)
- return 0;
- else
- return val;
-}
-
-void tegra_apb_writel(u32 value, unsigned long offset)
-{
- apbio_write(value, offset);
-}
diff --git a/arch/arm/mach-tegra/apbio.h b/arch/arm/mach-tegra/apbio.h
deleted file mode 100644
index f05d71c..0000000
--- a/arch/arm/mach-tegra/apbio.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright (C) 2010 NVIDIA Corporation.
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __MACH_TEGRA_APBIO_H
-#define __MACH_TEGRA_APBIO_H
-
-void tegra_apb_io_init(void);
-u32 tegra_apb_readl(unsigned long offset);
-void tegra_apb_writel(u32 value, unsigned long offset);
-#endif
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 093d5f4..ee6fbc6 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -43,7 +43,6 @@
#include <asm/setup.h>
#include <asm/trusted_foundations.h>
-#include "apbio.h"
#include "board.h"
#include "common.h"
#include "cpuidle.h"
@@ -100,7 +99,6 @@ static void __init tegra_init_cache(void)
static void __init tegra_init_early(void)
{
of_register_trusted_foundations();
- tegra_apb_io_init();
tegra_init_fuse();
tegra_cpu_reset_handler_init();
tegra_init_cache();
diff --git a/drivers/misc/fuse/tegra/fuse-tegra20.c b/drivers/misc/fuse/tegra/fuse-tegra20.c
index 09f91bf..c3dcf11 100644
--- a/drivers/misc/fuse/tegra/fuse-tegra20.c
+++ b/drivers/misc/fuse/tegra/fuse-tegra20.c
@@ -18,6 +18,9 @@
#include <linux/device.h>
#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
@@ -38,18 +41,58 @@ static phys_addr_t fuse_phys;
static struct clk *fuse_clk;
static void __iomem __initdata *fuse_base;
+static DEFINE_MUTEX(apb_dma_lock);
+static DECLARE_COMPLETION(apb_dma_wait);
+static struct dma_chan *apb_dma_chan;
+static struct dma_slave_config dma_sconfig;
+static u32 *apb_buffer;
+static dma_addr_t apb_buffer_phys;
+
+static void apb_dma_complete(void *args)
+{
+ complete(&apb_dma_wait);
+}
+
static u32 tegra20_fuse_readl(const unsigned int offset)
{
int ret;
- u32 val;
+ u32 val = 0;
+ struct dma_async_tx_descriptor *dma_desc;
+
+ mutex_lock(&apb_dma_lock);
+
+ dma_sconfig.src_addr = fuse_phys + FUSE_BEGIN + offset;
+ ret = dmaengine_slave_config(apb_dma_chan, &dma_sconfig);
+ if (ret)
+ goto out;
+
+ dma_desc = dmaengine_prep_slave_single(apb_dma_chan, apb_buffer_phys,
+ sizeof(u32), DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!dma_desc)
+ goto out;
+
+ dma_desc->callback = apb_dma_complete;
+ dma_desc->callback_param = NULL;
+
+ reinit_completion(&apb_dma_wait);
clk_prepare_enable(fuse_clk);
- ret = tegra_apb_readl_using_dma(fuse_phys + FUSE_BEGIN + offset, &val);
+ dmaengine_submit(dma_desc);
+ dma_async_issue_pending(apb_dma_chan);
+ ret = wait_for_completion_timeout(&apb_dma_wait, msecs_to_jiffies(50));
+
+ if (WARN(ret == 0, "apb read dma timed out"))
+ dmaengine_terminate_all(apb_dma_chan);
+ else
+ val = *apb_buffer;
clk_disable_unprepare(fuse_clk);
+out:
+ mutex_unlock(&apb_dma_lock);
- return (ret < 0) ? 0 : val;
+ return val;
}
static const struct of_device_id tegra20_fuse_of_match[] = {
@@ -57,9 +100,35 @@ static const struct of_device_id tegra20_fuse_of_match[] = {
{},
};
+static int apb_dma_init(void)
+{
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+ apb_dma_chan = dma_request_channel(mask, NULL, NULL);
+ if (!apb_dma_chan)
+ return -EPROBE_DEFER;
+
+ apb_buffer = dma_alloc_coherent(NULL, sizeof(u32), &apb_buffer_phys,
+ GFP_KERNEL);
+ if (!apb_buffer) {
+ dma_release_channel(apb_dma_chan);
+ return -ENOMEM;
+ }
+
+ dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_sconfig.src_maxburst = 1;
+ dma_sconfig.dst_maxburst = 1;
+
+ return 0;
+}
+
static int tegra20_fuse_probe(struct platform_device *pdev)
{
struct resource *res;
+ int err;
fuse_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(fuse_clk)) {
@@ -72,6 +141,10 @@ static int tegra20_fuse_probe(struct platform_device *pdev)
return -EINVAL;
fuse_phys = res->start;
+ err = apb_dma_init();
+ if (err)
+ return err;
+
if (tegra_fuse_create_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl))
return -ENODEV;
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 1ca3756..fcf65ec 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -59,20 +59,6 @@ int tegra_fuse_readl(u32 offset, u32 *val);
extern int tegra_chip_id;
extern struct tegra_sku_info tegra_sku_info;
-#if defined(CONFIG_TEGRA20_APB_DMA)
-int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
-int tegra_apb_writel_using_dma(u32 value, unsigned long offset);
-#else
-static inline int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
-{
- return -EINVAL;
-}
-static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
-{
- return -EINVAL;
-}
-#endif
-
#endif /* __ASSEMBLY__ */
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 6/6] misc: fuse: move APB DMA into Tegra20 fuse driver
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: linux-arm-kernel
The Tegra20 fuse driver is the only user of tegra_apb_readl_using_dma().
Therefore we can simply the code by incorporating the APB DMA handling into
the driver directly. tegra_apb_writel_using_dma() is dropped because there
are no users.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
arch/arm/mach-tegra/Makefile | 1 -
arch/arm/mach-tegra/apbio.c | 217 --------------------------------
arch/arm/mach-tegra/apbio.h | 22 ----
arch/arm/mach-tegra/tegra.c | 2 -
drivers/misc/fuse/tegra/fuse-tegra20.c | 79 +++++++++++-
include/linux/tegra-soc.h | 14 --
6 files changed, 76 insertions(+), 259 deletions(-)
delete mode 100644 arch/arm/mach-tegra/apbio.c
delete mode 100644 arch/arm/mach-tegra/apbio.h
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index e8601bb..c303b55 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -5,7 +5,6 @@ obj-y += irq.o
obj-y += pmc.o
obj-y += flowctrl.o
obj-y += powergate.o
-obj-y += apbio.o
obj-y += pm.o
obj-y += reset.o
obj-y += reset-handler.o
diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c
deleted file mode 100644
index e0bf49d..0000000
--- a/arch/arm/mach-tegra/apbio.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * Copyright (C) 2010 NVIDIA Corporation.
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/sched.h>
-#include <linux/mutex.h>
-
-#include "apbio.h"
-#include "iomap.h"
-
-#if defined(CONFIG_TEGRA20_APB_DMA)
-static DEFINE_MUTEX(tegra_apb_dma_lock);
-static u32 *tegra_apb_bb;
-static dma_addr_t tegra_apb_bb_phys;
-static DECLARE_COMPLETION(tegra_apb_wait);
-
-static int tegra_apb_readl_direct(unsigned long offset, u32 *value);
-static int tegra_apb_writel_direct(u32 value, unsigned long offset);
-
-static struct dma_chan *tegra_apb_dma_chan;
-static struct dma_slave_config dma_sconfig;
-
-static bool tegra_apb_dma_init(void)
-{
- dma_cap_mask_t mask;
-
- mutex_lock(&tegra_apb_dma_lock);
-
- /* Check to see if we raced to setup */
- if (tegra_apb_dma_chan)
- goto skip_init;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- tegra_apb_dma_chan = dma_request_channel(mask, NULL, NULL);
- if (!tegra_apb_dma_chan) {
- /*
- * This is common until the device is probed, so don't
- * shout about it.
- */
- pr_debug("%s: can not allocate dma channel\n", __func__);
- goto err_dma_alloc;
- }
-
- tegra_apb_bb = dma_alloc_coherent(NULL, sizeof(u32),
- &tegra_apb_bb_phys, GFP_KERNEL);
- if (!tegra_apb_bb) {
- pr_err("%s: can not allocate bounce buffer\n", __func__);
- goto err_buff_alloc;
- }
-
- dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- dma_sconfig.src_maxburst = 1;
- dma_sconfig.dst_maxburst = 1;
-
-skip_init:
- mutex_unlock(&tegra_apb_dma_lock);
- return true;
-
-err_buff_alloc:
- dma_release_channel(tegra_apb_dma_chan);
- tegra_apb_dma_chan = NULL;
-
-err_dma_alloc:
- mutex_unlock(&tegra_apb_dma_lock);
- return false;
-}
-
-static void apb_dma_complete(void *args)
-{
- complete(&tegra_apb_wait);
-}
-
-static int do_dma_transfer(unsigned long apb_add,
- enum dma_transfer_direction dir)
-{
- struct dma_async_tx_descriptor *dma_desc;
- int ret;
-
- if (dir == DMA_DEV_TO_MEM)
- dma_sconfig.src_addr = apb_add;
- else
- dma_sconfig.dst_addr = apb_add;
-
- ret = dmaengine_slave_config(tegra_apb_dma_chan, &dma_sconfig);
- if (ret)
- return ret;
-
- dma_desc = dmaengine_prep_slave_single(tegra_apb_dma_chan,
- tegra_apb_bb_phys, sizeof(u32), dir,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
- if (!dma_desc)
- return -EINVAL;
-
- dma_desc->callback = apb_dma_complete;
- dma_desc->callback_param = NULL;
-
- reinit_completion(&tegra_apb_wait);
-
- dmaengine_submit(dma_desc);
- dma_async_issue_pending(tegra_apb_dma_chan);
- ret = wait_for_completion_timeout(&tegra_apb_wait,
- msecs_to_jiffies(50));
-
- if (WARN(ret == 0, "apb read dma timed out")) {
- dmaengine_terminate_all(tegra_apb_dma_chan);
- return -EFAULT;
- }
- return 0;
-}
-
-int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
-{
- int ret;
-
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_readl_direct(offset, value);
-
- mutex_lock(&tegra_apb_dma_lock);
- ret = do_dma_transfer(offset, DMA_DEV_TO_MEM);
- if (ret < 0)
- pr_err("error in reading offset 0x%08lx using dma\n", offset);
- else
- *value = *tegra_apb_bb;
-
- mutex_unlock(&tegra_apb_dma_lock);
-
- return ret;
-}
-
-int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
-{
- int ret;
-
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_writel_direct(value, offset);
-
- mutex_lock(&tegra_apb_dma_lock);
- *((u32 *)tegra_apb_bb) = value;
- ret = do_dma_transfer(offset, DMA_MEM_TO_DEV);
- mutex_unlock(&tegra_apb_dma_lock);
- if (ret < 0)
- pr_err("error in writing offset 0x%08lx using dma\n", offset);
-
- return ret;
-}
-#else
-#define tegra_apb_readl_using_dma tegra_apb_readl_direct
-#define tegra_apb_writel_using_dma tegra_apb_writel_direct
-#endif
-
-typedef int (*apbio_read_fptr)(unsigned long offset, u32 *value);
-typedef int (*apbio_write_fptr)(u32 value, unsigned long offset);
-
-static apbio_read_fptr apbio_read;
-static apbio_write_fptr apbio_write;
-
-static int tegra_apb_readl_direct(unsigned long offset, u32 *value)
-{
- *value = readl(IO_ADDRESS(offset));
-
- return 0;
-}
-
-static int tegra_apb_writel_direct(u32 value, unsigned long offset)
-{
- writel(value, IO_ADDRESS(offset));
-
- return 0;
-}
-
-void tegra_apb_io_init(void)
-{
- /* Need to use dma only when it is Tegra20 based platform */
- if (of_machine_is_compatible("nvidia,tegra20") ||
- !of_have_populated_dt()) {
- apbio_read = tegra_apb_readl_using_dma;
- apbio_write = tegra_apb_writel_using_dma;
- } else {
- apbio_read = tegra_apb_readl_direct;
- apbio_write = tegra_apb_writel_direct;
- }
-}
-
-u32 tegra_apb_readl(unsigned long offset)
-{
- u32 val;
-
- if (apbio_read(offset, &val) < 0)
- return 0;
- else
- return val;
-}
-
-void tegra_apb_writel(u32 value, unsigned long offset)
-{
- apbio_write(value, offset);
-}
diff --git a/arch/arm/mach-tegra/apbio.h b/arch/arm/mach-tegra/apbio.h
deleted file mode 100644
index f05d71c..0000000
--- a/arch/arm/mach-tegra/apbio.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright (C) 2010 NVIDIA Corporation.
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __MACH_TEGRA_APBIO_H
-#define __MACH_TEGRA_APBIO_H
-
-void tegra_apb_io_init(void);
-u32 tegra_apb_readl(unsigned long offset);
-void tegra_apb_writel(u32 value, unsigned long offset);
-#endif
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 093d5f4..ee6fbc6 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -43,7 +43,6 @@
#include <asm/setup.h>
#include <asm/trusted_foundations.h>
-#include "apbio.h"
#include "board.h"
#include "common.h"
#include "cpuidle.h"
@@ -100,7 +99,6 @@ static void __init tegra_init_cache(void)
static void __init tegra_init_early(void)
{
of_register_trusted_foundations();
- tegra_apb_io_init();
tegra_init_fuse();
tegra_cpu_reset_handler_init();
tegra_init_cache();
diff --git a/drivers/misc/fuse/tegra/fuse-tegra20.c b/drivers/misc/fuse/tegra/fuse-tegra20.c
index 09f91bf..c3dcf11 100644
--- a/drivers/misc/fuse/tegra/fuse-tegra20.c
+++ b/drivers/misc/fuse/tegra/fuse-tegra20.c
@@ -18,6 +18,9 @@
#include <linux/device.h>
#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
@@ -38,18 +41,58 @@ static phys_addr_t fuse_phys;
static struct clk *fuse_clk;
static void __iomem __initdata *fuse_base;
+static DEFINE_MUTEX(apb_dma_lock);
+static DECLARE_COMPLETION(apb_dma_wait);
+static struct dma_chan *apb_dma_chan;
+static struct dma_slave_config dma_sconfig;
+static u32 *apb_buffer;
+static dma_addr_t apb_buffer_phys;
+
+static void apb_dma_complete(void *args)
+{
+ complete(&apb_dma_wait);
+}
+
static u32 tegra20_fuse_readl(const unsigned int offset)
{
int ret;
- u32 val;
+ u32 val = 0;
+ struct dma_async_tx_descriptor *dma_desc;
+
+ mutex_lock(&apb_dma_lock);
+
+ dma_sconfig.src_addr = fuse_phys + FUSE_BEGIN + offset;
+ ret = dmaengine_slave_config(apb_dma_chan, &dma_sconfig);
+ if (ret)
+ goto out;
+
+ dma_desc = dmaengine_prep_slave_single(apb_dma_chan, apb_buffer_phys,
+ sizeof(u32), DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!dma_desc)
+ goto out;
+
+ dma_desc->callback = apb_dma_complete;
+ dma_desc->callback_param = NULL;
+
+ reinit_completion(&apb_dma_wait);
clk_prepare_enable(fuse_clk);
- ret = tegra_apb_readl_using_dma(fuse_phys + FUSE_BEGIN + offset, &val);
+ dmaengine_submit(dma_desc);
+ dma_async_issue_pending(apb_dma_chan);
+ ret = wait_for_completion_timeout(&apb_dma_wait, msecs_to_jiffies(50));
+
+ if (WARN(ret == 0, "apb read dma timed out"))
+ dmaengine_terminate_all(apb_dma_chan);
+ else
+ val = *apb_buffer;
clk_disable_unprepare(fuse_clk);
+out:
+ mutex_unlock(&apb_dma_lock);
- return (ret < 0) ? 0 : val;
+ return val;
}
static const struct of_device_id tegra20_fuse_of_match[] = {
@@ -57,9 +100,35 @@ static const struct of_device_id tegra20_fuse_of_match[] = {
{},
};
+static int apb_dma_init(void)
+{
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+ apb_dma_chan = dma_request_channel(mask, NULL, NULL);
+ if (!apb_dma_chan)
+ return -EPROBE_DEFER;
+
+ apb_buffer = dma_alloc_coherent(NULL, sizeof(u32), &apb_buffer_phys,
+ GFP_KERNEL);
+ if (!apb_buffer) {
+ dma_release_channel(apb_dma_chan);
+ return -ENOMEM;
+ }
+
+ dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_sconfig.src_maxburst = 1;
+ dma_sconfig.dst_maxburst = 1;
+
+ return 0;
+}
+
static int tegra20_fuse_probe(struct platform_device *pdev)
{
struct resource *res;
+ int err;
fuse_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(fuse_clk)) {
@@ -72,6 +141,10 @@ static int tegra20_fuse_probe(struct platform_device *pdev)
return -EINVAL;
fuse_phys = res->start;
+ err = apb_dma_init();
+ if (err)
+ return err;
+
if (tegra_fuse_create_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl))
return -ENODEV;
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 1ca3756..fcf65ec 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -59,20 +59,6 @@ int tegra_fuse_readl(u32 offset, u32 *val);
extern int tegra_chip_id;
extern struct tegra_sku_info tegra_sku_info;
-#if defined(CONFIG_TEGRA20_APB_DMA)
-int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
-int tegra_apb_writel_using_dma(u32 value, unsigned long offset);
-#else
-static inline int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
-{
- return -EINVAL;
-}
-static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
-{
- return -EINVAL;
-}
-#endif
-
#endif /* __ASSEMBLY__ */
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
^ permalink raw reply related [flat|nested] 29+ messages in thread* [PATCH v8 6/6] misc: fuse: move APB DMA into Tegra20 fuse driver
@ 2014-06-12 15:36 ` Peter De Schrijver
0 siblings, 0 replies; 29+ messages in thread
From: Peter De Schrijver @ 2014-06-12 15:36 UTC (permalink / raw)
To: Peter De Schrijver
Cc: Russell King, Stephen Warren, Thierry Reding, Joseph Lo,
Bjorn Helgaas, Andrew Morton, Linus Walleij, Wolfram Sang,
Alexandre Courbot, Olof Johansson, Sebastian Hesselbarth,
Tuomas Tynkkynen, linux-arm-kernel, linux-tegra, linux-kernel
The Tegra20 fuse driver is the only user of tegra_apb_readl_using_dma().
Therefore we can simply the code by incorporating the APB DMA handling into
the driver directly. tegra_apb_writel_using_dma() is dropped because there
are no users.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
arch/arm/mach-tegra/Makefile | 1 -
arch/arm/mach-tegra/apbio.c | 217 --------------------------------
arch/arm/mach-tegra/apbio.h | 22 ----
arch/arm/mach-tegra/tegra.c | 2 -
drivers/misc/fuse/tegra/fuse-tegra20.c | 79 +++++++++++-
include/linux/tegra-soc.h | 14 --
6 files changed, 76 insertions(+), 259 deletions(-)
delete mode 100644 arch/arm/mach-tegra/apbio.c
delete mode 100644 arch/arm/mach-tegra/apbio.h
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index e8601bb..c303b55 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -5,7 +5,6 @@ obj-y += irq.o
obj-y += pmc.o
obj-y += flowctrl.o
obj-y += powergate.o
-obj-y += apbio.o
obj-y += pm.o
obj-y += reset.o
obj-y += reset-handler.o
diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c
deleted file mode 100644
index e0bf49d..0000000
--- a/arch/arm/mach-tegra/apbio.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * Copyright (C) 2010 NVIDIA Corporation.
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/sched.h>
-#include <linux/mutex.h>
-
-#include "apbio.h"
-#include "iomap.h"
-
-#if defined(CONFIG_TEGRA20_APB_DMA)
-static DEFINE_MUTEX(tegra_apb_dma_lock);
-static u32 *tegra_apb_bb;
-static dma_addr_t tegra_apb_bb_phys;
-static DECLARE_COMPLETION(tegra_apb_wait);
-
-static int tegra_apb_readl_direct(unsigned long offset, u32 *value);
-static int tegra_apb_writel_direct(u32 value, unsigned long offset);
-
-static struct dma_chan *tegra_apb_dma_chan;
-static struct dma_slave_config dma_sconfig;
-
-static bool tegra_apb_dma_init(void)
-{
- dma_cap_mask_t mask;
-
- mutex_lock(&tegra_apb_dma_lock);
-
- /* Check to see if we raced to setup */
- if (tegra_apb_dma_chan)
- goto skip_init;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- tegra_apb_dma_chan = dma_request_channel(mask, NULL, NULL);
- if (!tegra_apb_dma_chan) {
- /*
- * This is common until the device is probed, so don't
- * shout about it.
- */
- pr_debug("%s: can not allocate dma channel\n", __func__);
- goto err_dma_alloc;
- }
-
- tegra_apb_bb = dma_alloc_coherent(NULL, sizeof(u32),
- &tegra_apb_bb_phys, GFP_KERNEL);
- if (!tegra_apb_bb) {
- pr_err("%s: can not allocate bounce buffer\n", __func__);
- goto err_buff_alloc;
- }
-
- dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- dma_sconfig.src_maxburst = 1;
- dma_sconfig.dst_maxburst = 1;
-
-skip_init:
- mutex_unlock(&tegra_apb_dma_lock);
- return true;
-
-err_buff_alloc:
- dma_release_channel(tegra_apb_dma_chan);
- tegra_apb_dma_chan = NULL;
-
-err_dma_alloc:
- mutex_unlock(&tegra_apb_dma_lock);
- return false;
-}
-
-static void apb_dma_complete(void *args)
-{
- complete(&tegra_apb_wait);
-}
-
-static int do_dma_transfer(unsigned long apb_add,
- enum dma_transfer_direction dir)
-{
- struct dma_async_tx_descriptor *dma_desc;
- int ret;
-
- if (dir == DMA_DEV_TO_MEM)
- dma_sconfig.src_addr = apb_add;
- else
- dma_sconfig.dst_addr = apb_add;
-
- ret = dmaengine_slave_config(tegra_apb_dma_chan, &dma_sconfig);
- if (ret)
- return ret;
-
- dma_desc = dmaengine_prep_slave_single(tegra_apb_dma_chan,
- tegra_apb_bb_phys, sizeof(u32), dir,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
- if (!dma_desc)
- return -EINVAL;
-
- dma_desc->callback = apb_dma_complete;
- dma_desc->callback_param = NULL;
-
- reinit_completion(&tegra_apb_wait);
-
- dmaengine_submit(dma_desc);
- dma_async_issue_pending(tegra_apb_dma_chan);
- ret = wait_for_completion_timeout(&tegra_apb_wait,
- msecs_to_jiffies(50));
-
- if (WARN(ret == 0, "apb read dma timed out")) {
- dmaengine_terminate_all(tegra_apb_dma_chan);
- return -EFAULT;
- }
- return 0;
-}
-
-int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
-{
- int ret;
-
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_readl_direct(offset, value);
-
- mutex_lock(&tegra_apb_dma_lock);
- ret = do_dma_transfer(offset, DMA_DEV_TO_MEM);
- if (ret < 0)
- pr_err("error in reading offset 0x%08lx using dma\n", offset);
- else
- *value = *tegra_apb_bb;
-
- mutex_unlock(&tegra_apb_dma_lock);
-
- return ret;
-}
-
-int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
-{
- int ret;
-
- if (!tegra_apb_dma_chan && !tegra_apb_dma_init())
- return tegra_apb_writel_direct(value, offset);
-
- mutex_lock(&tegra_apb_dma_lock);
- *((u32 *)tegra_apb_bb) = value;
- ret = do_dma_transfer(offset, DMA_MEM_TO_DEV);
- mutex_unlock(&tegra_apb_dma_lock);
- if (ret < 0)
- pr_err("error in writing offset 0x%08lx using dma\n", offset);
-
- return ret;
-}
-#else
-#define tegra_apb_readl_using_dma tegra_apb_readl_direct
-#define tegra_apb_writel_using_dma tegra_apb_writel_direct
-#endif
-
-typedef int (*apbio_read_fptr)(unsigned long offset, u32 *value);
-typedef int (*apbio_write_fptr)(u32 value, unsigned long offset);
-
-static apbio_read_fptr apbio_read;
-static apbio_write_fptr apbio_write;
-
-static int tegra_apb_readl_direct(unsigned long offset, u32 *value)
-{
- *value = readl(IO_ADDRESS(offset));
-
- return 0;
-}
-
-static int tegra_apb_writel_direct(u32 value, unsigned long offset)
-{
- writel(value, IO_ADDRESS(offset));
-
- return 0;
-}
-
-void tegra_apb_io_init(void)
-{
- /* Need to use dma only when it is Tegra20 based platform */
- if (of_machine_is_compatible("nvidia,tegra20") ||
- !of_have_populated_dt()) {
- apbio_read = tegra_apb_readl_using_dma;
- apbio_write = tegra_apb_writel_using_dma;
- } else {
- apbio_read = tegra_apb_readl_direct;
- apbio_write = tegra_apb_writel_direct;
- }
-}
-
-u32 tegra_apb_readl(unsigned long offset)
-{
- u32 val;
-
- if (apbio_read(offset, &val) < 0)
- return 0;
- else
- return val;
-}
-
-void tegra_apb_writel(u32 value, unsigned long offset)
-{
- apbio_write(value, offset);
-}
diff --git a/arch/arm/mach-tegra/apbio.h b/arch/arm/mach-tegra/apbio.h
deleted file mode 100644
index f05d71c..0000000
--- a/arch/arm/mach-tegra/apbio.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright (C) 2010 NVIDIA Corporation.
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __MACH_TEGRA_APBIO_H
-#define __MACH_TEGRA_APBIO_H
-
-void tegra_apb_io_init(void);
-u32 tegra_apb_readl(unsigned long offset);
-void tegra_apb_writel(u32 value, unsigned long offset);
-#endif
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 093d5f4..ee6fbc6 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -43,7 +43,6 @@
#include <asm/setup.h>
#include <asm/trusted_foundations.h>
-#include "apbio.h"
#include "board.h"
#include "common.h"
#include "cpuidle.h"
@@ -100,7 +99,6 @@ static void __init tegra_init_cache(void)
static void __init tegra_init_early(void)
{
of_register_trusted_foundations();
- tegra_apb_io_init();
tegra_init_fuse();
tegra_cpu_reset_handler_init();
tegra_init_cache();
diff --git a/drivers/misc/fuse/tegra/fuse-tegra20.c b/drivers/misc/fuse/tegra/fuse-tegra20.c
index 09f91bf..c3dcf11 100644
--- a/drivers/misc/fuse/tegra/fuse-tegra20.c
+++ b/drivers/misc/fuse/tegra/fuse-tegra20.c
@@ -18,6 +18,9 @@
#include <linux/device.h>
#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
@@ -38,18 +41,58 @@ static phys_addr_t fuse_phys;
static struct clk *fuse_clk;
static void __iomem __initdata *fuse_base;
+static DEFINE_MUTEX(apb_dma_lock);
+static DECLARE_COMPLETION(apb_dma_wait);
+static struct dma_chan *apb_dma_chan;
+static struct dma_slave_config dma_sconfig;
+static u32 *apb_buffer;
+static dma_addr_t apb_buffer_phys;
+
+static void apb_dma_complete(void *args)
+{
+ complete(&apb_dma_wait);
+}
+
static u32 tegra20_fuse_readl(const unsigned int offset)
{
int ret;
- u32 val;
+ u32 val = 0;
+ struct dma_async_tx_descriptor *dma_desc;
+
+ mutex_lock(&apb_dma_lock);
+
+ dma_sconfig.src_addr = fuse_phys + FUSE_BEGIN + offset;
+ ret = dmaengine_slave_config(apb_dma_chan, &dma_sconfig);
+ if (ret)
+ goto out;
+
+ dma_desc = dmaengine_prep_slave_single(apb_dma_chan, apb_buffer_phys,
+ sizeof(u32), DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!dma_desc)
+ goto out;
+
+ dma_desc->callback = apb_dma_complete;
+ dma_desc->callback_param = NULL;
+
+ reinit_completion(&apb_dma_wait);
clk_prepare_enable(fuse_clk);
- ret = tegra_apb_readl_using_dma(fuse_phys + FUSE_BEGIN + offset, &val);
+ dmaengine_submit(dma_desc);
+ dma_async_issue_pending(apb_dma_chan);
+ ret = wait_for_completion_timeout(&apb_dma_wait, msecs_to_jiffies(50));
+
+ if (WARN(ret == 0, "apb read dma timed out"))
+ dmaengine_terminate_all(apb_dma_chan);
+ else
+ val = *apb_buffer;
clk_disable_unprepare(fuse_clk);
+out:
+ mutex_unlock(&apb_dma_lock);
- return (ret < 0) ? 0 : val;
+ return val;
}
static const struct of_device_id tegra20_fuse_of_match[] = {
@@ -57,9 +100,35 @@ static const struct of_device_id tegra20_fuse_of_match[] = {
{},
};
+static int apb_dma_init(void)
+{
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+ apb_dma_chan = dma_request_channel(mask, NULL, NULL);
+ if (!apb_dma_chan)
+ return -EPROBE_DEFER;
+
+ apb_buffer = dma_alloc_coherent(NULL, sizeof(u32), &apb_buffer_phys,
+ GFP_KERNEL);
+ if (!apb_buffer) {
+ dma_release_channel(apb_dma_chan);
+ return -ENOMEM;
+ }
+
+ dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_sconfig.src_maxburst = 1;
+ dma_sconfig.dst_maxburst = 1;
+
+ return 0;
+}
+
static int tegra20_fuse_probe(struct platform_device *pdev)
{
struct resource *res;
+ int err;
fuse_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(fuse_clk)) {
@@ -72,6 +141,10 @@ static int tegra20_fuse_probe(struct platform_device *pdev)
return -EINVAL;
fuse_phys = res->start;
+ err = apb_dma_init();
+ if (err)
+ return err;
+
if (tegra_fuse_create_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl))
return -ENODEV;
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 1ca3756..fcf65ec 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -59,20 +59,6 @@ int tegra_fuse_readl(u32 offset, u32 *val);
extern int tegra_chip_id;
extern struct tegra_sku_info tegra_sku_info;
-#if defined(CONFIG_TEGRA20_APB_DMA)
-int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
-int tegra_apb_writel_using_dma(u32 value, unsigned long offset);
-#else
-static inline int tegra_apb_readl_using_dma(unsigned long offset, u32 *value)
-{
- return -EINVAL;
-}
-static inline int tegra_apb_writel_using_dma(u32 value, unsigned long offset)
-{
- return -EINVAL;
-}
-#endif
-
#endif /* __ASSEMBLY__ */
#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.7.rc0.72.g4b5ea.dirty
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