* [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
@ 2012-09-21 12:20 Venu Byravarasu
2012-09-21 13:09 ` ABRAHAM, KISHON VIJAY
2012-09-21 17:46 ` Stephen Warren
0 siblings, 2 replies; 8+ messages in thread
From: Venu Byravarasu @ 2012-09-21 12:20 UTC (permalink / raw)
To: balbi, gregkh; +Cc: linux-kernel, linux-usb, Venu Byravarasu
NVIDIA produces several Tegra SoCs viz Tegra20, Tegra30 etc.
In order to support USB PHY drivers on these SoCs, existing
PHY driver is split into SoC agnostic common USB PHY driver
and Tegra20-specific USB phy driver. This will facilitate
easy addition and deletion of phy drivers for Tegra SoCs.
Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
---
delta from v2:
Added an if condition to check for device_node to be not NULL,
before dereferencing it.
drivers/usb/host/ehci-tegra.c | 26 +-
drivers/usb/phy/Makefile | 1 +
.../usb/phy/{tegra_usb_phy.c => tegra2_usb_phy.c} | 421 +++----------
drivers/usb/phy/tegra2_usb_phy.h | 140 ++++
drivers/usb/phy/tegra_usb_phy.c | 688 +-------------------
include/linux/usb/tegra_usb_phy.h | 34 +-
6 files changed, 298 insertions(+), 1012 deletions(-)
copy drivers/usb/phy/{tegra_usb_phy.c => tegra2_usb_phy.c} (53%)
create mode 100644 drivers/usb/phy/tegra2_usb_phy.h
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 6223d17..8199a6e 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -618,6 +618,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
int err = 0;
int irq;
int instance = pdev->id;
+ struct device_node *np = pdev->dev.of_node;
+ struct phy_params params;
+ int phy_type;
pdata = pdev->dev.platform_data;
if (!pdata) {
@@ -701,14 +704,29 @@ static int tegra_ehci_probe(struct platform_device *pdev)
break;
default:
err = -ENODEV;
- dev_err(&pdev->dev, "unknown usb instance\n");
+ dev_err(&pdev->dev, "unknown usb inst:%d\n", instance);
goto fail_io;
}
}
+ if (np) {
+ phy_type = of_property_match_string(np, "phy_type", "utmi");
+ if (phy_type >= 0)
+ params.type = TEGRA_USB_PHY_TYPE_UTMI;
+ else {
+ phy_type = of_property_match_string(np, "phy_type", "ulpi");
+ if (phy_type >= 0)
+ params.type = TEGRA_USB_PHY_TYPE_ULPI;
+ else
+ params.type = TEGRA_USB_PHY_TYPE_INVALID;
+ }
+ }
+
+ params.mode = TEGRA_USB_PHY_MODE_HOST;
+ params.config = pdata->phy_config;
+
tegra->phy = tegra_usb_phy_open(&pdev->dev, instance, hcd->regs,
- pdata->phy_config,
- TEGRA_USB_PHY_MODE_HOST);
+ ¶ms);
if (IS_ERR(tegra->phy)) {
dev_err(&pdev->dev, "Failed to open USB phy\n");
err = -ENXIO;
@@ -744,7 +762,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
err = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (err) {
- dev_err(&pdev->dev, "Failed to add USB HCD\n");
+ dev_err(&pdev->dev, "usb_add_hcd failed with err 0x%x\n", err);
goto fail;
}
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index b069f29..21872e1 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_OMAP_USB2) += omap-usb2.o
obj-$(CONFIG_USB_ISP1301) += isp1301.o
obj-$(CONFIG_MV_U3D_PHY) += mv_u3d_phy.o
obj-$(CONFIG_USB_EHCI_TEGRA) += tegra_usb_phy.o
+obj-$(CONFIG_USB_EHCI_TEGRA) += tegra2_usb_phy.o
diff --git a/drivers/usb/phy/tegra_usb_phy.c b/drivers/usb/phy/tegra2_usb_phy.c
similarity index 53%
copy from drivers/usb/phy/tegra_usb_phy.c
copy to drivers/usb/phy/tegra2_usb_phy.c
index 987116f..4896a4d 100644
--- a/drivers/usb/phy/tegra_usb_phy.c
+++ b/drivers/usb/phy/tegra2_usb_phy.c
@@ -1,9 +1,11 @@
/*
* Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*
* Author:
* Erik Gilling <konkers@google.com>
* Benoit Goby <benoit@android.com>
+ * Venu Byravarasu <vbyravarasu@nvidia.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
@@ -31,187 +33,18 @@
#include <linux/usb/tegra_usb_phy.h>
#include <mach/iomap.h>
-#define ULPI_VIEWPORT 0x170
-
-#define USB_PORTSC1 0x184
-#define USB_PORTSC1_PTS(x) (((x) & 0x3) << 30)
-#define USB_PORTSC1_PSPD(x) (((x) & 0x3) << 26)
-#define USB_PORTSC1_PHCD (1 << 23)
-#define USB_PORTSC1_WKOC (1 << 22)
-#define USB_PORTSC1_WKDS (1 << 21)
-#define USB_PORTSC1_WKCN (1 << 20)
-#define USB_PORTSC1_PTC(x) (((x) & 0xf) << 16)
-#define USB_PORTSC1_PP (1 << 12)
-#define USB_PORTSC1_SUSP (1 << 7)
-#define USB_PORTSC1_PE (1 << 2)
-#define USB_PORTSC1_CCS (1 << 0)
-
-#define USB_SUSP_CTRL 0x400
-#define USB_WAKE_ON_CNNT_EN_DEV (1 << 3)
-#define USB_WAKE_ON_DISCON_EN_DEV (1 << 4)
-#define USB_SUSP_CLR (1 << 5)
-#define USB_PHY_CLK_VALID (1 << 7)
-#define UTMIP_RESET (1 << 11)
-#define UHSIC_RESET (1 << 11)
-#define UTMIP_PHY_ENABLE (1 << 12)
-#define ULPI_PHY_ENABLE (1 << 13)
-#define USB_SUSP_SET (1 << 14)
-#define USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16)
-
-#define USB1_LEGACY_CTRL 0x410
-#define USB1_NO_LEGACY_MODE (1 << 0)
-#define USB1_VBUS_SENSE_CTL_MASK (3 << 1)
-#define USB1_VBUS_SENSE_CTL_VBUS_WAKEUP (0 << 1)
-#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
- (1 << 1)
-#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD (2 << 1)
-#define USB1_VBUS_SENSE_CTL_A_SESS_VLD (3 << 1)
-
-#define ULPI_TIMING_CTRL_0 0x424
-#define ULPI_OUTPUT_PINMUX_BYP (1 << 10)
-#define ULPI_CLKOUT_PINMUX_BYP (1 << 11)
-
-#define ULPI_TIMING_CTRL_1 0x428
-#define ULPI_DATA_TRIMMER_LOAD (1 << 0)
-#define ULPI_DATA_TRIMMER_SEL(x) (((x) & 0x7) << 1)
-#define ULPI_STPDIRNXT_TRIMMER_LOAD (1 << 16)
-#define ULPI_STPDIRNXT_TRIMMER_SEL(x) (((x) & 0x7) << 17)
-#define ULPI_DIR_TRIMMER_LOAD (1 << 24)
-#define ULPI_DIR_TRIMMER_SEL(x) (((x) & 0x7) << 25)
-
-#define UTMIP_PLL_CFG1 0x804
-#define UTMIP_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0)
-#define UTMIP_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 27)
-
-#define UTMIP_XCVR_CFG0 0x808
-#define UTMIP_XCVR_SETUP(x) (((x) & 0xf) << 0)
-#define UTMIP_XCVR_LSRSLEW(x) (((x) & 0x3) << 8)
-#define UTMIP_XCVR_LSFSLEW(x) (((x) & 0x3) << 10)
-#define UTMIP_FORCE_PD_POWERDOWN (1 << 14)
-#define UTMIP_FORCE_PD2_POWERDOWN (1 << 16)
-#define UTMIP_FORCE_PDZI_POWERDOWN (1 << 18)
-#define UTMIP_XCVR_HSSLEW_MSB(x) (((x) & 0x7f) << 25)
-
-#define UTMIP_BIAS_CFG0 0x80c
-#define UTMIP_OTGPD (1 << 11)
-#define UTMIP_BIASPD (1 << 10)
-
-#define UTMIP_HSRX_CFG0 0x810
-#define UTMIP_ELASTIC_LIMIT(x) (((x) & 0x1f) << 10)
-#define UTMIP_IDLE_WAIT(x) (((x) & 0x1f) << 15)
-
-#define UTMIP_HSRX_CFG1 0x814
-#define UTMIP_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1)
-
-#define UTMIP_TX_CFG0 0x820
-#define UTMIP_FS_PREABMLE_J (1 << 19)
-#define UTMIP_HS_DISCON_DISABLE (1 << 8)
-
-#define UTMIP_MISC_CFG0 0x824
-#define UTMIP_DPDM_OBSERVE (1 << 26)
-#define UTMIP_DPDM_OBSERVE_SEL(x) (((x) & 0xf) << 27)
-#define UTMIP_DPDM_OBSERVE_SEL_FS_J UTMIP_DPDM_OBSERVE_SEL(0xf)
-#define UTMIP_DPDM_OBSERVE_SEL_FS_K UTMIP_DPDM_OBSERVE_SEL(0xe)
-#define UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd)
-#define UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc)
-#define UTMIP_SUSPEND_EXIT_ON_EDGE (1 << 22)
-
-#define UTMIP_MISC_CFG1 0x828
-#define UTMIP_PLL_ACTIVE_DLY_COUNT(x) (((x) & 0x1f) << 18)
-#define UTMIP_PLLU_STABLE_COUNT(x) (((x) & 0xfff) << 6)
-
-#define UTMIP_DEBOUNCE_CFG0 0x82c
-#define UTMIP_BIAS_DEBOUNCE_A(x) (((x) & 0xffff) << 0)
-
-#define UTMIP_BAT_CHRG_CFG0 0x830
-#define UTMIP_PD_CHRG (1 << 0)
-
-#define UTMIP_SPARE_CFG0 0x834
-#define FUSE_SETUP_SEL (1 << 3)
-
-#define UTMIP_XCVR_CFG1 0x838
-#define UTMIP_FORCE_PDDISC_POWERDOWN (1 << 0)
-#define UTMIP_FORCE_PDCHRP_POWERDOWN (1 << 2)
-#define UTMIP_FORCE_PDDR_POWERDOWN (1 << 4)
-#define UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18)
-
-#define UTMIP_BIAS_CFG1 0x83c
-#define UTMIP_BIAS_PDTRK_COUNT(x) (((x) & 0x1f) << 3)
+#include "tegra2_usb_phy.h"
static DEFINE_SPINLOCK(utmip_pad_lock);
static int utmip_pad_count;
-struct tegra_xtal_freq {
- int freq;
- u8 enable_delay;
- u8 stable_count;
- u8 active_delay;
- u8 xtal_freq_count;
- u16 debounce;
-};
-
-static const struct tegra_xtal_freq tegra_freq_table[] = {
- {
- .freq = 12000000,
- .enable_delay = 0x02,
- .stable_count = 0x2F,
- .active_delay = 0x04,
- .xtal_freq_count = 0x76,
- .debounce = 0x7530,
- },
- {
- .freq = 13000000,
- .enable_delay = 0x02,
- .stable_count = 0x33,
- .active_delay = 0x05,
- .xtal_freq_count = 0x7F,
- .debounce = 0x7EF4,
- },
- {
- .freq = 19200000,
- .enable_delay = 0x03,
- .stable_count = 0x4B,
- .active_delay = 0x06,
- .xtal_freq_count = 0xBB,
- .debounce = 0xBB80,
- },
- {
- .freq = 26000000,
- .enable_delay = 0x04,
- .stable_count = 0x66,
- .active_delay = 0x09,
- .xtal_freq_count = 0xFE,
- .debounce = 0xFDE8,
- },
-};
-
-static struct tegra_utmip_config utmip_default[] = {
- [0] = {
- .hssync_start_delay = 9,
- .idle_wait_delay = 17,
- .elastic_limit = 16,
- .term_range_adj = 6,
- .xcvr_setup = 9,
- .xcvr_lsfslew = 1,
- .xcvr_lsrslew = 1,
- },
- [2] = {
- .hssync_start_delay = 9,
- .idle_wait_delay = 17,
- .elastic_limit = 16,
- .term_range_adj = 6,
- .xcvr_setup = 9,
- .xcvr_lsfslew = 2,
- .xcvr_lsrslew = 2,
- },
-};
-
static inline bool phy_is_ulpi(struct tegra_usb_phy *phy)
{
- return (phy->instance == 1);
+ return (phy->type == TEGRA_USB_PHY_TYPE_ULPI);
}
-static int utmip_pad_open(struct tegra_usb_phy *phy)
+
+static int tegra2_utmip_pad_open(struct tegra_usb_phy *phy)
{
phy->pad_clk = clk_get_sys("utmip-pad", NULL);
if (IS_ERR(phy->pad_clk)) {
@@ -232,14 +65,14 @@ static int utmip_pad_open(struct tegra_usb_phy *phy)
return 0;
}
-static void utmip_pad_close(struct tegra_usb_phy *phy)
+static void tegra2_utmip_pad_close(struct tegra_usb_phy *phy)
{
if (phy->instance != 0)
iounmap(phy->pad_regs);
clk_put(phy->pad_clk);
}
-static void utmip_pad_power_on(struct tegra_usb_phy *phy)
+static void tegra2_utmip_pad_power_on(struct tegra_usb_phy *phy)
{
unsigned long val, flags;
void __iomem *base = phy->pad_regs;
@@ -259,7 +92,7 @@ static void utmip_pad_power_on(struct tegra_usb_phy *phy)
clk_disable_unprepare(phy->pad_clk);
}
-static int utmip_pad_power_off(struct tegra_usb_phy *phy)
+static int tegra2_utmip_pad_power_off(struct tegra_usb_phy *phy)
{
unsigned long val, flags;
void __iomem *base = phy->pad_regs;
@@ -289,6 +122,7 @@ static int utmip_pad_power_off(struct tegra_usb_phy *phy)
static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
{
unsigned long timeout = 2000;
+
do {
if ((readl(reg) & mask) == result)
return 0;
@@ -298,7 +132,7 @@ static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
return -1;
}
-static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
+static void tegra2_utmi_phy_clk_disable(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -325,7 +159,7 @@ static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
}
-static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
+static void tegra2_utmi_phy_clk_enable(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -353,7 +187,7 @@ static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
}
-static int utmi_phy_power_on(struct tegra_usb_phy *phy)
+static int tegra2_utmi_phy_power_on(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -411,7 +245,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
writel(val, base + USB_SUSP_CTRL);
}
- utmip_pad_power_on(phy);
+ tegra2_utmip_pad_power_on(phy);
val = readl(base + UTMIP_XCVR_CFG0);
val &= ~(UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
@@ -468,7 +302,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
writel(val, base + USB_SUSP_CTRL);
}
- utmi_phy_clk_enable(phy);
+ tegra2_utmi_phy_clk_enable(phy);
if (phy->instance == 2) {
val = readl(base + USB_PORTSC1);
@@ -479,12 +313,12 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
return 0;
}
-static int utmi_phy_power_off(struct tegra_usb_phy *phy)
+static int tegra2_utmi_phy_power_off(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
- utmi_phy_clk_disable(phy);
+ tegra2_utmi_phy_clk_disable(phy);
if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE) {
val = readl(base + USB_SUSP_CTRL);
@@ -511,10 +345,10 @@ static int utmi_phy_power_off(struct tegra_usb_phy *phy)
UTMIP_FORCE_PDDR_POWERDOWN;
writel(val, base + UTMIP_XCVR_CFG1);
- return utmip_pad_power_off(phy);
+ return tegra2_utmip_pad_power_off(phy);
}
-static void utmi_phy_preresume(struct tegra_usb_phy *phy)
+static void tegra2_utmi_phy_preresume(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -524,7 +358,7 @@ static void utmi_phy_preresume(struct tegra_usb_phy *phy)
writel(val, base + UTMIP_TX_CFG0);
}
-static void utmi_phy_postresume(struct tegra_usb_phy *phy)
+static void tegra2_utmi_phy_postresume(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -534,7 +368,7 @@ static void utmi_phy_postresume(struct tegra_usb_phy *phy)
writel(val, base + UTMIP_TX_CFG0);
}
-static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
+static void tegra2_utmi_phy_restore_start(struct tegra_usb_phy *phy,
enum tegra_usb_phy_port_speed port_speed)
{
unsigned long val;
@@ -555,7 +389,7 @@ static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
udelay(10);
}
-static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
+static void tegra2_utmi_phy_restore_end(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -566,7 +400,7 @@ static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
udelay(10);
}
-static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
+static int tegra2_ulpi_phy_power_on(struct tegra_usb_phy *phy)
{
int ret;
unsigned long val;
@@ -635,7 +469,7 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
return 0;
}
-static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
+static int tegra2_ulpi_phy_power_off(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
@@ -652,187 +486,80 @@ static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
return gpio_direction_output(config->reset_gpio, 0);
}
-static int tegra_phy_init(struct usb_phy *x)
-{
- struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
- struct tegra_ulpi_config *ulpi_config;
- int err;
-
- if (phy_is_ulpi(phy)) {
- ulpi_config = phy->config;
- phy->clk = clk_get_sys(NULL, ulpi_config->clk);
- if (IS_ERR(phy->clk)) {
- pr_err("%s: can't get ulpi clock\n", __func__);
- err = -ENXIO;
- goto err1;
- }
- if (!gpio_is_valid(ulpi_config->reset_gpio))
- ulpi_config->reset_gpio =
- of_get_named_gpio(phy->dev->of_node,
- "nvidia,phy-reset-gpio", 0);
- if (!gpio_is_valid(ulpi_config->reset_gpio)) {
- pr_err("%s: invalid reset gpio: %d\n", __func__,
- ulpi_config->reset_gpio);
- err = -EINVAL;
- goto err1;
- }
- gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b");
- gpio_direction_output(ulpi_config->reset_gpio, 0);
- phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
- phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
- } else {
- err = utmip_pad_open(phy);
- if (err < 0)
- goto err1;
- }
- return 0;
-err1:
- clk_disable_unprepare(phy->pll_u);
- clk_put(phy->pll_u);
- return err;
-}
-
-static void tegra_usb_phy_close(struct usb_phy *x)
+static void tegra2_usb_phy_close(struct tegra_usb_phy *phy)
{
- struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
-
if (phy_is_ulpi(phy))
clk_put(phy->clk);
else
- utmip_pad_close(phy);
+ tegra2_utmip_pad_close(phy);
clk_disable_unprepare(phy->pll_u);
clk_put(phy->pll_u);
- kfree(phy);
}
-static int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
+static int tegra2_usb_utmi_phy_open(struct tegra_usb_phy *phy)
{
- if (phy_is_ulpi(phy))
- return ulpi_phy_power_on(phy);
- else
- return utmi_phy_power_on(phy);
-}
+ int err;
-static int tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
-{
- if (phy_is_ulpi(phy))
- return ulpi_phy_power_off(phy);
- else
- return utmi_phy_power_off(phy);
-}
+ err = tegra2_utmip_pad_open(phy);
+ if (err < 0) {
+ dev_err(phy->dev, "%s returned err", __func__);
+ return err;
+ }
-static int tegra_usb_phy_suspend(struct usb_phy *x, int suspend)
-{
- struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
- if (suspend)
- return tegra_usb_phy_power_off(phy);
- else
- return tegra_usb_phy_power_on(phy);
+ phy->ops.postresume = tegra2_utmi_phy_postresume;
+ phy->ops.power_off = tegra2_utmi_phy_power_off;
+ phy->ops.power_on = tegra2_utmi_phy_power_on;
+ phy->ops.preresume = tegra2_utmi_phy_preresume;
+ phy->ops.restore_end = tegra2_utmi_phy_restore_end;
+ phy->ops.restore_start = tegra2_utmi_phy_restore_start;
+
+ return err;
}
-struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
- void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode)
+static int tegra2_usb_ulpi_phy_open(struct tegra_usb_phy *phy)
{
- struct tegra_usb_phy *phy;
- unsigned long parent_rate;
- int i;
- int err;
-
- phy = kmalloc(sizeof(struct tegra_usb_phy), GFP_KERNEL);
- if (!phy)
- return ERR_PTR(-ENOMEM);
-
- phy->instance = instance;
- phy->regs = regs;
- phy->config = config;
- phy->mode = phy_mode;
- phy->dev = dev;
-
- if (!phy->config) {
- if (phy_is_ulpi(phy)) {
- pr_err("%s: ulpi phy configuration missing", __func__);
- err = -EINVAL;
- goto err0;
- } else {
- phy->config = &utmip_default[instance];
- }
- }
+ struct tegra_ulpi_config *ulpi_config;
- phy->pll_u = clk_get_sys(NULL, "pll_u");
- if (IS_ERR(phy->pll_u)) {
- pr_err("Can't get pll_u clock\n");
- err = PTR_ERR(phy->pll_u);
- goto err0;
+ ulpi_config = phy->config;
+ phy->clk = clk_get_sys(NULL, ulpi_config->clk);
+ if (IS_ERR(phy->clk)) {
+ pr_err("%s: can't get ulpi clock\n", __func__);
+ return -ENXIO;
}
- clk_prepare_enable(phy->pll_u);
-
- parent_rate = clk_get_rate(clk_get_parent(phy->pll_u));
- for (i = 0; i < ARRAY_SIZE(tegra_freq_table); i++) {
- if (tegra_freq_table[i].freq == parent_rate) {
- phy->freq = &tegra_freq_table[i];
- break;
- }
- }
- if (!phy->freq) {
- pr_err("invalid pll_u parent rate %ld\n", parent_rate);
- err = -EINVAL;
- goto err1;
+ if (!gpio_is_valid(ulpi_config->reset_gpio))
+ ulpi_config->reset_gpio =
+ of_get_named_gpio(phy->dev->of_node,
+ "nvidia,phy-reset-gpio", 0);
+ if (!gpio_is_valid(ulpi_config->reset_gpio)) {
+ pr_err("%s: invalid reset gpio: %d\n", __func__,
+ ulpi_config->reset_gpio);
+ return -EINVAL;
}
+ gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b");
+ gpio_direction_output(ulpi_config->reset_gpio, 0);
+ phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
+ phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
- phy->u_phy.init = tegra_phy_init;
- phy->u_phy.shutdown = tegra_usb_phy_close;
- phy->u_phy.set_suspend = tegra_usb_phy_suspend;
-
- return phy;
-
-err1:
- clk_disable_unprepare(phy->pll_u);
- clk_put(phy->pll_u);
-err0:
- kfree(phy);
- return ERR_PTR(err);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_open);
+ phy->ops.power_on = tegra2_ulpi_phy_power_on;
+ phy->ops.power_off = tegra2_ulpi_phy_power_off;
-void tegra_usb_phy_preresume(struct tegra_usb_phy *phy)
-{
- if (!phy_is_ulpi(phy))
- utmi_phy_preresume(phy);
+ return 0;
}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume);
-void tegra_usb_phy_postresume(struct tegra_usb_phy *phy)
+int tegra2_usb_phy_open(struct tegra_usb_phy *phy)
{
- if (!phy_is_ulpi(phy))
- utmi_phy_postresume(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume);
+ int err;
-void tegra_ehci_phy_restore_start(struct tegra_usb_phy *phy,
- enum tegra_usb_phy_port_speed port_speed)
-{
- if (!phy_is_ulpi(phy))
- utmi_phy_restore_start(phy, port_speed);
-}
-EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start);
+ if ((phy->type != TEGRA_USB_PHY_TYPE_ULPI) &&
+ (phy->type != TEGRA_USB_PHY_TYPE_UTMI))
+ return -EINVAL;
-void tegra_ehci_phy_restore_end(struct tegra_usb_phy *phy)
-{
- if (!phy_is_ulpi(phy))
- utmi_phy_restore_end(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
+ phy->ops.close = tegra2_usb_phy_close;
-void tegra_usb_phy_clk_disable(struct tegra_usb_phy *phy)
-{
- if (!phy_is_ulpi(phy))
- utmi_phy_clk_disable(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_clk_disable);
+ if (phy_is_ulpi(phy))
+ err = tegra2_usb_ulpi_phy_open(phy);
+ else
+ err = tegra2_usb_utmi_phy_open(phy);
-void tegra_usb_phy_clk_enable(struct tegra_usb_phy *phy)
-{
- if (!phy_is_ulpi(phy))
- utmi_phy_clk_enable(phy);
+ return err;
}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_clk_enable);
diff --git a/drivers/usb/phy/tegra2_usb_phy.h b/drivers/usb/phy/tegra2_usb_phy.h
new file mode 100644
index 0000000..dc27da4
--- /dev/null
+++ b/drivers/usb/phy/tegra2_usb_phy.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Venu Byravarasu <vbyravarasu@nvidia.com>
+ *
+ * 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/>.
+ */
+
+#ifndef _TEGRA2_USB_PHY_H
+#define _TEGRA2_USB_PHY_H
+
+#define ULPI_VIEWPORT 0x170
+
+#define USB_PORTSC1 0x184
+#define USB_PORTSC1_PTS(x) (((x) & 0x3) << 30)
+#define USB_PORTSC1_PSPD(x) (((x) & 0x3) << 26)
+#define USB_PORTSC1_PHCD (1 << 23)
+#define USB_PORTSC1_WKOC (1 << 22)
+#define USB_PORTSC1_WKDS (1 << 21)
+#define USB_PORTSC1_WKCN (1 << 20)
+#define USB_PORTSC1_PTC(x) (((x) & 0xf) << 16)
+#define USB_PORTSC1_PP (1 << 12)
+#define USB_PORTSC1_SUSP (1 << 7)
+#define USB_PORTSC1_PE (1 << 2)
+#define USB_PORTSC1_CCS (1 << 0)
+
+#define USB_SUSP_CTRL 0x400
+#define USB_WAKE_ON_CNNT_EN_DEV (1 << 3)
+#define USB_WAKE_ON_DISCON_EN_DEV (1 << 4)
+#define USB_SUSP_CLR (1 << 5)
+#define USB_PHY_CLK_VALID (1 << 7)
+#define UTMIP_RESET (1 << 11)
+#define UHSIC_RESET (1 << 11)
+#define UTMIP_PHY_ENABLE (1 << 12)
+#define ULPI_PHY_ENABLE (1 << 13)
+#define USB_SUSP_SET (1 << 14)
+#define USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16)
+
+#define USB1_LEGACY_CTRL 0x410
+#define USB1_NO_LEGACY_MODE (1 << 0)
+#define USB1_VBUS_SENSE_CTL_MASK (3 << 1)
+#define USB1_VBUS_SENSE_CTL_VBUS_WAKEUP (0 << 1)
+#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
+ (1 << 1)
+#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD (2 << 1)
+#define USB1_VBUS_SENSE_CTL_A_SESS_VLD (3 << 1)
+
+#define ULPI_TIMING_CTRL_0 0x424
+#define ULPI_OUTPUT_PINMUX_BYP (1 << 10)
+#define ULPI_CLKOUT_PINMUX_BYP (1 << 11)
+
+#define ULPI_TIMING_CTRL_1 0x428
+#define ULPI_DATA_TRIMMER_LOAD (1 << 0)
+#define ULPI_DATA_TRIMMER_SEL(x) (((x) & 0x7) << 1)
+#define ULPI_STPDIRNXT_TRIMMER_LOAD (1 << 16)
+#define ULPI_STPDIRNXT_TRIMMER_SEL(x) (((x) & 0x7) << 17)
+#define ULPI_DIR_TRIMMER_LOAD (1 << 24)
+#define ULPI_DIR_TRIMMER_SEL(x) (((x) & 0x7) << 25)
+
+#define UTMIP_PLL_CFG1 0x804
+#define UTMIP_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0)
+#define UTMIP_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 27)
+
+#define UTMIP_XCVR_CFG0 0x808
+#define UTMIP_XCVR_SETUP(x) (((x) & 0xf) << 0)
+#define UTMIP_XCVR_LSRSLEW(x) (((x) & 0x3) << 8)
+#define UTMIP_XCVR_LSFSLEW(x) (((x) & 0x3) << 10)
+#define UTMIP_FORCE_PD_POWERDOWN (1 << 14)
+#define UTMIP_FORCE_PD2_POWERDOWN (1 << 16)
+#define UTMIP_FORCE_PDZI_POWERDOWN (1 << 18)
+#define UTMIP_XCVR_HSSLEW_MSB(x) (((x) & 0x7f) << 25)
+
+#define UTMIP_BIAS_CFG0 0x80c
+#define UTMIP_OTGPD (1 << 11)
+#define UTMIP_BIASPD (1 << 10)
+
+#define UTMIP_HSRX_CFG0 0x810
+#define UTMIP_ELASTIC_LIMIT(x) (((x) & 0x1f) << 10)
+#define UTMIP_IDLE_WAIT(x) (((x) & 0x1f) << 15)
+
+#define UTMIP_HSRX_CFG1 0x814
+#define UTMIP_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1)
+
+#define UTMIP_TX_CFG0 0x820
+#define UTMIP_FS_PREABMLE_J (1 << 19)
+#define UTMIP_HS_DISCON_DISABLE (1 << 8)
+
+#define UTMIP_MISC_CFG0 0x824
+#define UTMIP_DPDM_OBSERVE (1 << 26)
+#define UTMIP_DPDM_OBSERVE_SEL(x) (((x) & 0xf) << 27)
+#define UTMIP_DPDM_OBSERVE_SEL_FS_J UTMIP_DPDM_OBSERVE_SEL(0xf)
+#define UTMIP_DPDM_OBSERVE_SEL_FS_K UTMIP_DPDM_OBSERVE_SEL(0xe)
+#define UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd)
+#define UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc)
+#define UTMIP_SUSPEND_EXIT_ON_EDGE (1 << 22)
+
+#define UTMIP_MISC_CFG1 0x828
+#define UTMIP_PLL_ACTIVE_DLY_COUNT(x) (((x) & 0x1f) << 18)
+#define UTMIP_PLLU_STABLE_COUNT(x) (((x) & 0xfff) << 6)
+
+#define UTMIP_DEBOUNCE_CFG0 0x82c
+#define UTMIP_BIAS_DEBOUNCE_A(x) (((x) & 0xffff) << 0)
+
+#define UTMIP_BAT_CHRG_CFG0 0x830
+#define UTMIP_PD_CHRG (1 << 0)
+
+#define UTMIP_SPARE_CFG0 0x834
+#define FUSE_SETUP_SEL (1 << 3)
+
+#define UTMIP_XCVR_CFG1 0x838
+#define UTMIP_FORCE_PDDISC_POWERDOWN (1 << 0)
+#define UTMIP_FORCE_PDCHRP_POWERDOWN (1 << 2)
+#define UTMIP_FORCE_PDDR_POWERDOWN (1 << 4)
+#define UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18)
+
+#define UTMIP_BIAS_CFG1 0x83c
+#define UTMIP_BIAS_PDTRK_COUNT(x) (((x) & 0x1f) << 3)
+
+struct tegra_xtal_freq {
+ int freq;
+ u8 enable_delay;
+ u8 stable_count;
+ u8 active_delay;
+ u8 xtal_freq_count;
+ u16 debounce;
+};
+
+int tegra2_usb_phy_open(struct tegra_usb_phy *phy);
+
+#endif /* _TEGRA2_USB_PHY_H */
diff --git a/drivers/usb/phy/tegra_usb_phy.c b/drivers/usb/phy/tegra_usb_phy.c
index 987116f..4f481fd 100644
--- a/drivers/usb/phy/tegra_usb_phy.c
+++ b/drivers/usb/phy/tegra_usb_phy.c
@@ -30,125 +30,7 @@
#include <asm/mach-types.h>
#include <linux/usb/tegra_usb_phy.h>
#include <mach/iomap.h>
-
-#define ULPI_VIEWPORT 0x170
-
-#define USB_PORTSC1 0x184
-#define USB_PORTSC1_PTS(x) (((x) & 0x3) << 30)
-#define USB_PORTSC1_PSPD(x) (((x) & 0x3) << 26)
-#define USB_PORTSC1_PHCD (1 << 23)
-#define USB_PORTSC1_WKOC (1 << 22)
-#define USB_PORTSC1_WKDS (1 << 21)
-#define USB_PORTSC1_WKCN (1 << 20)
-#define USB_PORTSC1_PTC(x) (((x) & 0xf) << 16)
-#define USB_PORTSC1_PP (1 << 12)
-#define USB_PORTSC1_SUSP (1 << 7)
-#define USB_PORTSC1_PE (1 << 2)
-#define USB_PORTSC1_CCS (1 << 0)
-
-#define USB_SUSP_CTRL 0x400
-#define USB_WAKE_ON_CNNT_EN_DEV (1 << 3)
-#define USB_WAKE_ON_DISCON_EN_DEV (1 << 4)
-#define USB_SUSP_CLR (1 << 5)
-#define USB_PHY_CLK_VALID (1 << 7)
-#define UTMIP_RESET (1 << 11)
-#define UHSIC_RESET (1 << 11)
-#define UTMIP_PHY_ENABLE (1 << 12)
-#define ULPI_PHY_ENABLE (1 << 13)
-#define USB_SUSP_SET (1 << 14)
-#define USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16)
-
-#define USB1_LEGACY_CTRL 0x410
-#define USB1_NO_LEGACY_MODE (1 << 0)
-#define USB1_VBUS_SENSE_CTL_MASK (3 << 1)
-#define USB1_VBUS_SENSE_CTL_VBUS_WAKEUP (0 << 1)
-#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
- (1 << 1)
-#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD (2 << 1)
-#define USB1_VBUS_SENSE_CTL_A_SESS_VLD (3 << 1)
-
-#define ULPI_TIMING_CTRL_0 0x424
-#define ULPI_OUTPUT_PINMUX_BYP (1 << 10)
-#define ULPI_CLKOUT_PINMUX_BYP (1 << 11)
-
-#define ULPI_TIMING_CTRL_1 0x428
-#define ULPI_DATA_TRIMMER_LOAD (1 << 0)
-#define ULPI_DATA_TRIMMER_SEL(x) (((x) & 0x7) << 1)
-#define ULPI_STPDIRNXT_TRIMMER_LOAD (1 << 16)
-#define ULPI_STPDIRNXT_TRIMMER_SEL(x) (((x) & 0x7) << 17)
-#define ULPI_DIR_TRIMMER_LOAD (1 << 24)
-#define ULPI_DIR_TRIMMER_SEL(x) (((x) & 0x7) << 25)
-
-#define UTMIP_PLL_CFG1 0x804
-#define UTMIP_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0)
-#define UTMIP_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 27)
-
-#define UTMIP_XCVR_CFG0 0x808
-#define UTMIP_XCVR_SETUP(x) (((x) & 0xf) << 0)
-#define UTMIP_XCVR_LSRSLEW(x) (((x) & 0x3) << 8)
-#define UTMIP_XCVR_LSFSLEW(x) (((x) & 0x3) << 10)
-#define UTMIP_FORCE_PD_POWERDOWN (1 << 14)
-#define UTMIP_FORCE_PD2_POWERDOWN (1 << 16)
-#define UTMIP_FORCE_PDZI_POWERDOWN (1 << 18)
-#define UTMIP_XCVR_HSSLEW_MSB(x) (((x) & 0x7f) << 25)
-
-#define UTMIP_BIAS_CFG0 0x80c
-#define UTMIP_OTGPD (1 << 11)
-#define UTMIP_BIASPD (1 << 10)
-
-#define UTMIP_HSRX_CFG0 0x810
-#define UTMIP_ELASTIC_LIMIT(x) (((x) & 0x1f) << 10)
-#define UTMIP_IDLE_WAIT(x) (((x) & 0x1f) << 15)
-
-#define UTMIP_HSRX_CFG1 0x814
-#define UTMIP_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1)
-
-#define UTMIP_TX_CFG0 0x820
-#define UTMIP_FS_PREABMLE_J (1 << 19)
-#define UTMIP_HS_DISCON_DISABLE (1 << 8)
-
-#define UTMIP_MISC_CFG0 0x824
-#define UTMIP_DPDM_OBSERVE (1 << 26)
-#define UTMIP_DPDM_OBSERVE_SEL(x) (((x) & 0xf) << 27)
-#define UTMIP_DPDM_OBSERVE_SEL_FS_J UTMIP_DPDM_OBSERVE_SEL(0xf)
-#define UTMIP_DPDM_OBSERVE_SEL_FS_K UTMIP_DPDM_OBSERVE_SEL(0xe)
-#define UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd)
-#define UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc)
-#define UTMIP_SUSPEND_EXIT_ON_EDGE (1 << 22)
-
-#define UTMIP_MISC_CFG1 0x828
-#define UTMIP_PLL_ACTIVE_DLY_COUNT(x) (((x) & 0x1f) << 18)
-#define UTMIP_PLLU_STABLE_COUNT(x) (((x) & 0xfff) << 6)
-
-#define UTMIP_DEBOUNCE_CFG0 0x82c
-#define UTMIP_BIAS_DEBOUNCE_A(x) (((x) & 0xffff) << 0)
-
-#define UTMIP_BAT_CHRG_CFG0 0x830
-#define UTMIP_PD_CHRG (1 << 0)
-
-#define UTMIP_SPARE_CFG0 0x834
-#define FUSE_SETUP_SEL (1 << 3)
-
-#define UTMIP_XCVR_CFG1 0x838
-#define UTMIP_FORCE_PDDISC_POWERDOWN (1 << 0)
-#define UTMIP_FORCE_PDCHRP_POWERDOWN (1 << 2)
-#define UTMIP_FORCE_PDDR_POWERDOWN (1 << 4)
-#define UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18)
-
-#define UTMIP_BIAS_CFG1 0x83c
-#define UTMIP_BIAS_PDTRK_COUNT(x) (((x) & 0x1f) << 3)
-
-static DEFINE_SPINLOCK(utmip_pad_lock);
-static int utmip_pad_count;
-
-struct tegra_xtal_freq {
- int freq;
- u8 enable_delay;
- u8 stable_count;
- u8 active_delay;
- u8 xtal_freq_count;
- u16 debounce;
-};
+#include "tegra2_usb_phy.h"
static const struct tegra_xtal_freq tegra_freq_table[] = {
{
@@ -206,489 +88,15 @@ static struct tegra_utmip_config utmip_default[] = {
},
};
-static inline bool phy_is_ulpi(struct tegra_usb_phy *phy)
-{
- return (phy->instance == 1);
-}
-
-static int utmip_pad_open(struct tegra_usb_phy *phy)
-{
- phy->pad_clk = clk_get_sys("utmip-pad", NULL);
- if (IS_ERR(phy->pad_clk)) {
- pr_err("%s: can't get utmip pad clock\n", __func__);
- return PTR_ERR(phy->pad_clk);
- }
-
- if (phy->instance == 0) {
- phy->pad_regs = phy->regs;
- } else {
- phy->pad_regs = ioremap(TEGRA_USB_BASE, TEGRA_USB_SIZE);
- if (!phy->pad_regs) {
- pr_err("%s: can't remap usb registers\n", __func__);
- clk_put(phy->pad_clk);
- return -ENOMEM;
- }
- }
- return 0;
-}
-
-static void utmip_pad_close(struct tegra_usb_phy *phy)
-{
- if (phy->instance != 0)
- iounmap(phy->pad_regs);
- clk_put(phy->pad_clk);
-}
-
-static void utmip_pad_power_on(struct tegra_usb_phy *phy)
-{
- unsigned long val, flags;
- void __iomem *base = phy->pad_regs;
-
- clk_prepare_enable(phy->pad_clk);
-
- spin_lock_irqsave(&utmip_pad_lock, flags);
-
- if (utmip_pad_count++ == 0) {
- val = readl(base + UTMIP_BIAS_CFG0);
- val &= ~(UTMIP_OTGPD | UTMIP_BIASPD);
- writel(val, base + UTMIP_BIAS_CFG0);
- }
-
- spin_unlock_irqrestore(&utmip_pad_lock, flags);
-
- clk_disable_unprepare(phy->pad_clk);
-}
-
-static int utmip_pad_power_off(struct tegra_usb_phy *phy)
-{
- unsigned long val, flags;
- void __iomem *base = phy->pad_regs;
-
- if (!utmip_pad_count) {
- pr_err("%s: utmip pad already powered off\n", __func__);
- return -EINVAL;
- }
-
- clk_prepare_enable(phy->pad_clk);
-
- spin_lock_irqsave(&utmip_pad_lock, flags);
-
- if (--utmip_pad_count == 0) {
- val = readl(base + UTMIP_BIAS_CFG0);
- val |= UTMIP_OTGPD | UTMIP_BIASPD;
- writel(val, base + UTMIP_BIAS_CFG0);
- }
-
- spin_unlock_irqrestore(&utmip_pad_lock, flags);
-
- clk_disable_unprepare(phy->pad_clk);
-
- return 0;
-}
-
-static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
-{
- unsigned long timeout = 2000;
- do {
- if ((readl(reg) & mask) == result)
- return 0;
- udelay(1);
- timeout--;
- } while (timeout);
- return -1;
-}
-
-static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
-
- if (phy->instance == 0) {
- val = readl(base + USB_SUSP_CTRL);
- val |= USB_SUSP_SET;
- writel(val, base + USB_SUSP_CTRL);
-
- udelay(10);
-
- val = readl(base + USB_SUSP_CTRL);
- val &= ~USB_SUSP_SET;
- writel(val, base + USB_SUSP_CTRL);
- }
-
- if (phy->instance == 2) {
- val = readl(base + USB_PORTSC1);
- val |= USB_PORTSC1_PHCD;
- writel(val, base + USB_PORTSC1);
- }
-
- if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) < 0)
- pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
-}
-
-static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
-
- if (phy->instance == 0) {
- val = readl(base + USB_SUSP_CTRL);
- val |= USB_SUSP_CLR;
- writel(val, base + USB_SUSP_CTRL);
-
- udelay(10);
-
- val = readl(base + USB_SUSP_CTRL);
- val &= ~USB_SUSP_CLR;
- writel(val, base + USB_SUSP_CTRL);
- }
-
- if (phy->instance == 2) {
- val = readl(base + USB_PORTSC1);
- val &= ~USB_PORTSC1_PHCD;
- writel(val, base + USB_PORTSC1);
- }
-
- if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
- USB_PHY_CLK_VALID))
- pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
-}
-
-static int utmi_phy_power_on(struct tegra_usb_phy *phy)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
- struct tegra_utmip_config *config = phy->config;
-
- val = readl(base + USB_SUSP_CTRL);
- val |= UTMIP_RESET;
- writel(val, base + USB_SUSP_CTRL);
-
- if (phy->instance == 0) {
- val = readl(base + USB1_LEGACY_CTRL);
- val |= USB1_NO_LEGACY_MODE;
- writel(val, base + USB1_LEGACY_CTRL);
- }
-
- val = readl(base + UTMIP_TX_CFG0);
- val &= ~UTMIP_FS_PREABMLE_J;
- writel(val, base + UTMIP_TX_CFG0);
-
- val = readl(base + UTMIP_HSRX_CFG0);
- val &= ~(UTMIP_IDLE_WAIT(~0) | UTMIP_ELASTIC_LIMIT(~0));
- val |= UTMIP_IDLE_WAIT(config->idle_wait_delay);
- val |= UTMIP_ELASTIC_LIMIT(config->elastic_limit);
- writel(val, base + UTMIP_HSRX_CFG0);
-
- val = readl(base + UTMIP_HSRX_CFG1);
- val &= ~UTMIP_HS_SYNC_START_DLY(~0);
- val |= UTMIP_HS_SYNC_START_DLY(config->hssync_start_delay);
- writel(val, base + UTMIP_HSRX_CFG1);
-
- val = readl(base + UTMIP_DEBOUNCE_CFG0);
- val &= ~UTMIP_BIAS_DEBOUNCE_A(~0);
- val |= UTMIP_BIAS_DEBOUNCE_A(phy->freq->debounce);
- writel(val, base + UTMIP_DEBOUNCE_CFG0);
-
- val = readl(base + UTMIP_MISC_CFG0);
- val &= ~UTMIP_SUSPEND_EXIT_ON_EDGE;
- writel(val, base + UTMIP_MISC_CFG0);
-
- val = readl(base + UTMIP_MISC_CFG1);
- val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) | UTMIP_PLLU_STABLE_COUNT(~0));
- val |= UTMIP_PLL_ACTIVE_DLY_COUNT(phy->freq->active_delay) |
- UTMIP_PLLU_STABLE_COUNT(phy->freq->stable_count);
- writel(val, base + UTMIP_MISC_CFG1);
-
- val = readl(base + UTMIP_PLL_CFG1);
- val &= ~(UTMIP_XTAL_FREQ_COUNT(~0) | UTMIP_PLLU_ENABLE_DLY_COUNT(~0));
- val |= UTMIP_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count) |
- UTMIP_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay);
- writel(val, base + UTMIP_PLL_CFG1);
-
- if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE) {
- val = readl(base + USB_SUSP_CTRL);
- val &= ~(USB_WAKE_ON_CNNT_EN_DEV | USB_WAKE_ON_DISCON_EN_DEV);
- writel(val, base + USB_SUSP_CTRL);
- }
-
- utmip_pad_power_on(phy);
-
- val = readl(base + UTMIP_XCVR_CFG0);
- val &= ~(UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
- UTMIP_FORCE_PDZI_POWERDOWN | UTMIP_XCVR_SETUP(~0) |
- UTMIP_XCVR_LSFSLEW(~0) | UTMIP_XCVR_LSRSLEW(~0) |
- UTMIP_XCVR_HSSLEW_MSB(~0));
- val |= UTMIP_XCVR_SETUP(config->xcvr_setup);
- val |= UTMIP_XCVR_LSFSLEW(config->xcvr_lsfslew);
- val |= UTMIP_XCVR_LSRSLEW(config->xcvr_lsrslew);
- writel(val, base + UTMIP_XCVR_CFG0);
-
- val = readl(base + UTMIP_XCVR_CFG1);
- val &= ~(UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
- UTMIP_FORCE_PDDR_POWERDOWN | UTMIP_XCVR_TERM_RANGE_ADJ(~0));
- val |= UTMIP_XCVR_TERM_RANGE_ADJ(config->term_range_adj);
- writel(val, base + UTMIP_XCVR_CFG1);
-
- val = readl(base + UTMIP_BAT_CHRG_CFG0);
- val &= ~UTMIP_PD_CHRG;
- writel(val, base + UTMIP_BAT_CHRG_CFG0);
-
- val = readl(base + UTMIP_BIAS_CFG1);
- val &= ~UTMIP_BIAS_PDTRK_COUNT(~0);
- val |= UTMIP_BIAS_PDTRK_COUNT(0x5);
- writel(val, base + UTMIP_BIAS_CFG1);
-
- if (phy->instance == 0) {
- val = readl(base + UTMIP_SPARE_CFG0);
- if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE)
- val &= ~FUSE_SETUP_SEL;
- else
- val |= FUSE_SETUP_SEL;
- writel(val, base + UTMIP_SPARE_CFG0);
- }
-
- if (phy->instance == 2) {
- val = readl(base + USB_SUSP_CTRL);
- val |= UTMIP_PHY_ENABLE;
- writel(val, base + USB_SUSP_CTRL);
- }
-
- val = readl(base + USB_SUSP_CTRL);
- val &= ~UTMIP_RESET;
- writel(val, base + USB_SUSP_CTRL);
-
- if (phy->instance == 0) {
- val = readl(base + USB1_LEGACY_CTRL);
- val &= ~USB1_VBUS_SENSE_CTL_MASK;
- val |= USB1_VBUS_SENSE_CTL_A_SESS_VLD;
- writel(val, base + USB1_LEGACY_CTRL);
-
- val = readl(base + USB_SUSP_CTRL);
- val &= ~USB_SUSP_SET;
- writel(val, base + USB_SUSP_CTRL);
- }
-
- utmi_phy_clk_enable(phy);
-
- if (phy->instance == 2) {
- val = readl(base + USB_PORTSC1);
- val &= ~USB_PORTSC1_PTS(~0);
- writel(val, base + USB_PORTSC1);
- }
-
- return 0;
-}
-
-static int utmi_phy_power_off(struct tegra_usb_phy *phy)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
-
- utmi_phy_clk_disable(phy);
-
- if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE) {
- val = readl(base + USB_SUSP_CTRL);
- val &= ~USB_WAKEUP_DEBOUNCE_COUNT(~0);
- val |= USB_WAKE_ON_CNNT_EN_DEV | USB_WAKEUP_DEBOUNCE_COUNT(5);
- writel(val, base + USB_SUSP_CTRL);
- }
-
- val = readl(base + USB_SUSP_CTRL);
- val |= UTMIP_RESET;
- writel(val, base + USB_SUSP_CTRL);
-
- val = readl(base + UTMIP_BAT_CHRG_CFG0);
- val |= UTMIP_PD_CHRG;
- writel(val, base + UTMIP_BAT_CHRG_CFG0);
-
- val = readl(base + UTMIP_XCVR_CFG0);
- val |= UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
- UTMIP_FORCE_PDZI_POWERDOWN;
- writel(val, base + UTMIP_XCVR_CFG0);
-
- val = readl(base + UTMIP_XCVR_CFG1);
- val |= UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
- UTMIP_FORCE_PDDR_POWERDOWN;
- writel(val, base + UTMIP_XCVR_CFG1);
-
- return utmip_pad_power_off(phy);
-}
-
-static void utmi_phy_preresume(struct tegra_usb_phy *phy)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
-
- val = readl(base + UTMIP_TX_CFG0);
- val |= UTMIP_HS_DISCON_DISABLE;
- writel(val, base + UTMIP_TX_CFG0);
-}
-
-static void utmi_phy_postresume(struct tegra_usb_phy *phy)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
-
- val = readl(base + UTMIP_TX_CFG0);
- val &= ~UTMIP_HS_DISCON_DISABLE;
- writel(val, base + UTMIP_TX_CFG0);
-}
-
-static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
- enum tegra_usb_phy_port_speed port_speed)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
-
- val = readl(base + UTMIP_MISC_CFG0);
- val &= ~UTMIP_DPDM_OBSERVE_SEL(~0);
- if (port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
- val |= UTMIP_DPDM_OBSERVE_SEL_FS_K;
- else
- val |= UTMIP_DPDM_OBSERVE_SEL_FS_J;
- writel(val, base + UTMIP_MISC_CFG0);
- udelay(1);
-
- val = readl(base + UTMIP_MISC_CFG0);
- val |= UTMIP_DPDM_OBSERVE;
- writel(val, base + UTMIP_MISC_CFG0);
- udelay(10);
-}
-
-static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
-
- val = readl(base + UTMIP_MISC_CFG0);
- val &= ~UTMIP_DPDM_OBSERVE;
- writel(val, base + UTMIP_MISC_CFG0);
- udelay(10);
-}
-
-static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
-{
- int ret;
- unsigned long val;
- void __iomem *base = phy->regs;
- struct tegra_ulpi_config *config = phy->config;
-
- gpio_direction_output(config->reset_gpio, 0);
- msleep(5);
- gpio_direction_output(config->reset_gpio, 1);
-
- clk_prepare_enable(phy->clk);
- msleep(1);
-
- val = readl(base + USB_SUSP_CTRL);
- val |= UHSIC_RESET;
- writel(val, base + USB_SUSP_CTRL);
-
- val = readl(base + ULPI_TIMING_CTRL_0);
- val |= ULPI_OUTPUT_PINMUX_BYP | ULPI_CLKOUT_PINMUX_BYP;
- writel(val, base + ULPI_TIMING_CTRL_0);
-
- val = readl(base + USB_SUSP_CTRL);
- val |= ULPI_PHY_ENABLE;
- writel(val, base + USB_SUSP_CTRL);
-
- val = 0;
- writel(val, base + ULPI_TIMING_CTRL_1);
-
- val |= ULPI_DATA_TRIMMER_SEL(4);
- val |= ULPI_STPDIRNXT_TRIMMER_SEL(4);
- val |= ULPI_DIR_TRIMMER_SEL(4);
- writel(val, base + ULPI_TIMING_CTRL_1);
- udelay(10);
-
- val |= ULPI_DATA_TRIMMER_LOAD;
- val |= ULPI_STPDIRNXT_TRIMMER_LOAD;
- val |= ULPI_DIR_TRIMMER_LOAD;
- writel(val, base + ULPI_TIMING_CTRL_1);
-
- /* Fix VbusInvalid due to floating VBUS */
- ret = usb_phy_io_write(phy->ulpi, 0x40, 0x08);
- if (ret) {
- pr_err("%s: ulpi write failed\n", __func__);
- return ret;
- }
-
- ret = usb_phy_io_write(phy->ulpi, 0x80, 0x0B);
- if (ret) {
- pr_err("%s: ulpi write failed\n", __func__);
- return ret;
- }
-
- val = readl(base + USB_PORTSC1);
- val |= USB_PORTSC1_WKOC | USB_PORTSC1_WKDS | USB_PORTSC1_WKCN;
- writel(val, base + USB_PORTSC1);
-
- val = readl(base + USB_SUSP_CTRL);
- val |= USB_SUSP_CLR;
- writel(val, base + USB_SUSP_CTRL);
- udelay(100);
-
- val = readl(base + USB_SUSP_CTRL);
- val &= ~USB_SUSP_CLR;
- writel(val, base + USB_SUSP_CTRL);
-
- return 0;
-}
-
-static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
-{
- unsigned long val;
- void __iomem *base = phy->regs;
- struct tegra_ulpi_config *config = phy->config;
-
- /* Clear WKCN/WKDS/WKOC wake-on events that can cause the USB
- * Controller to immediately bring the ULPI PHY out of low power
- */
- val = readl(base + USB_PORTSC1);
- val &= ~(USB_PORTSC1_WKOC | USB_PORTSC1_WKDS | USB_PORTSC1_WKCN);
- writel(val, base + USB_PORTSC1);
-
- clk_disable(phy->clk);
- return gpio_direction_output(config->reset_gpio, 0);
-}
-
-static int tegra_phy_init(struct usb_phy *x)
+static int tegra_phy_init(struct usb_phy *x)
{
struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
- struct tegra_ulpi_config *ulpi_config;
int err;
- if (phy_is_ulpi(phy)) {
- ulpi_config = phy->config;
- phy->clk = clk_get_sys(NULL, ulpi_config->clk);
- if (IS_ERR(phy->clk)) {
- pr_err("%s: can't get ulpi clock\n", __func__);
- err = -ENXIO;
- goto err1;
- }
- if (!gpio_is_valid(ulpi_config->reset_gpio))
- ulpi_config->reset_gpio =
- of_get_named_gpio(phy->dev->of_node,
- "nvidia,phy-reset-gpio", 0);
- if (!gpio_is_valid(ulpi_config->reset_gpio)) {
- pr_err("%s: invalid reset gpio: %d\n", __func__,
- ulpi_config->reset_gpio);
- err = -EINVAL;
- goto err1;
- }
- gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b");
- gpio_direction_output(ulpi_config->reset_gpio, 0);
- phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
- phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
- } else {
- err = utmip_pad_open(phy);
- if (err < 0)
- goto err1;
- }
- return 0;
-err1:
- clk_disable_unprepare(phy->pll_u);
- clk_put(phy->pll_u);
+ err = tegra2_usb_phy_open(phy);
+ if (err < 0)
+ dev_err(phy->dev, "phy type %d is not supported\n", phy->type);
+
return err;
}
@@ -696,61 +104,44 @@ static void tegra_usb_phy_close(struct usb_phy *x)
{
struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
- if (phy_is_ulpi(phy))
- clk_put(phy->clk);
- else
- utmip_pad_close(phy);
- clk_disable_unprepare(phy->pll_u);
- clk_put(phy->pll_u);
- kfree(phy);
-}
-
-static int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
-{
- if (phy_is_ulpi(phy))
- return ulpi_phy_power_on(phy);
- else
- return utmi_phy_power_on(phy);
-}
-
-static int tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
-{
- if (phy_is_ulpi(phy))
- return ulpi_phy_power_off(phy);
- else
- return utmi_phy_power_off(phy);
+ phy->ops.close(phy);
}
static int tegra_usb_phy_suspend(struct usb_phy *x, int suspend)
{
struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
- if (suspend)
- return tegra_usb_phy_power_off(phy);
- else
- return tegra_usb_phy_power_on(phy);
+
+ if (suspend) {
+ if (phy->ops.power_off)
+ return phy->ops.power_off(phy);
+ } else if (phy->ops.power_on)
+ return phy->ops.power_on(phy);
+
+ return 0;
}
struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
- void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode)
+ void __iomem *regs, struct phy_params *params)
{
struct tegra_usb_phy *phy;
unsigned long parent_rate;
int i;
int err;
- phy = kmalloc(sizeof(struct tegra_usb_phy), GFP_KERNEL);
+ phy = devm_kzalloc(dev, sizeof(struct tegra_usb_phy), GFP_KERNEL);
if (!phy)
return ERR_PTR(-ENOMEM);
phy->instance = instance;
phy->regs = regs;
- phy->config = config;
- phy->mode = phy_mode;
+ phy->config = params->config;
+ phy->mode = params->mode;
phy->dev = dev;
+ phy->type = params->type;
if (!phy->config) {
- if (phy_is_ulpi(phy)) {
- pr_err("%s: ulpi phy configuration missing", __func__);
+ if (params->type == TEGRA_USB_PHY_TYPE_ULPI) {
+ dev_err(phy->dev, "ulpi phy configuration missing");
err = -EINVAL;
goto err0;
} else {
@@ -760,7 +151,7 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
phy->pll_u = clk_get_sys(NULL, "pll_u");
if (IS_ERR(phy->pll_u)) {
- pr_err("Can't get pll_u clock\n");
+ dev_err(phy->dev, "Can't get pll_u clock\n");
err = PTR_ERR(phy->pll_u);
goto err0;
}
@@ -774,7 +165,7 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
}
}
if (!phy->freq) {
- pr_err("invalid pll_u parent rate %ld\n", parent_rate);
+ dev_err(phy->dev, "invalid clk rate %ld\n", parent_rate);
err = -EINVAL;
goto err1;
}
@@ -789,50 +180,35 @@ err1:
clk_disable_unprepare(phy->pll_u);
clk_put(phy->pll_u);
err0:
- kfree(phy);
return ERR_PTR(err);
}
EXPORT_SYMBOL_GPL(tegra_usb_phy_open);
void tegra_usb_phy_preresume(struct tegra_usb_phy *phy)
{
- if (!phy_is_ulpi(phy))
- utmi_phy_preresume(phy);
+ if (phy->ops.preresume)
+ phy->ops.preresume(phy);
}
EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume);
void tegra_usb_phy_postresume(struct tegra_usb_phy *phy)
{
- if (!phy_is_ulpi(phy))
- utmi_phy_postresume(phy);
+ if (phy->ops.postresume)
+ phy->ops.postresume(phy);
}
EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume);
void tegra_ehci_phy_restore_start(struct tegra_usb_phy *phy,
enum tegra_usb_phy_port_speed port_speed)
{
- if (!phy_is_ulpi(phy))
- utmi_phy_restore_start(phy, port_speed);
+ if (phy->ops.restore_start)
+ phy->ops.restore_start(phy, port_speed);
}
EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start);
void tegra_ehci_phy_restore_end(struct tegra_usb_phy *phy)
{
- if (!phy_is_ulpi(phy))
- utmi_phy_restore_end(phy);
+ if (phy->ops.restore_end)
+ phy->ops.restore_end(phy);
}
EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
-
-void tegra_usb_phy_clk_disable(struct tegra_usb_phy *phy)
-{
- if (!phy_is_ulpi(phy))
- utmi_phy_clk_disable(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_clk_disable);
-
-void tegra_usb_phy_clk_enable(struct tegra_usb_phy *phy)
-{
- if (!phy_is_ulpi(phy))
- utmi_phy_clk_enable(phy);
-}
-EXPORT_SYMBOL_GPL(tegra_usb_phy_clk_enable);
diff --git a/include/linux/usb/tegra_usb_phy.h b/include/linux/usb/tegra_usb_phy.h
index 176b1ca..8e1a34a 100644
--- a/include/linux/usb/tegra_usb_phy.h
+++ b/include/linux/usb/tegra_usb_phy.h
@@ -44,8 +44,34 @@ enum tegra_usb_phy_mode {
TEGRA_USB_PHY_MODE_HOST,
};
+enum tegra_usb_phy_type {
+ TEGRA_USB_PHY_TYPE_UTMI = 0,
+ TEGRA_USB_PHY_TYPE_ULPI,
+ TEGRA_USB_PHY_TYPE_INVALID,
+};
+
+struct tegra_usb_phy;
+
+struct tegra_usb_phy_ops {
+ int (*open)(struct tegra_usb_phy *phy);
+ void (*close)(struct tegra_usb_phy *phy);
+ int (*power_on)(struct tegra_usb_phy *phy);
+ int (*power_off)(struct tegra_usb_phy *phy);
+ void (*preresume)(struct tegra_usb_phy *phy);
+ void (*postresume)(struct tegra_usb_phy *phy);
+ void (*restore_start)(struct tegra_usb_phy *phy,
+ enum tegra_usb_phy_port_speed port_speed);
+ void (*restore_end)(struct tegra_usb_phy *phy);
+};
+
struct tegra_xtal_freq;
+struct phy_params {
+ void *config;
+ enum tegra_usb_phy_mode mode;
+ enum tegra_usb_phy_type type;
+};
+
struct tegra_usb_phy {
int instance;
const struct tegra_xtal_freq *freq;
@@ -58,15 +84,13 @@ struct tegra_usb_phy {
void *config;
struct usb_phy *ulpi;
struct usb_phy u_phy;
+ struct tegra_usb_phy_ops ops;
+ enum tegra_usb_phy_type type;
struct device *dev;
};
struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
- void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode);
-
-void tegra_usb_phy_clk_disable(struct tegra_usb_phy *phy);
-
-void tegra_usb_phy_clk_enable(struct tegra_usb_phy *phy);
+ void __iomem *regs, struct phy_params *params);
void tegra_usb_phy_preresume(struct tegra_usb_phy *phy);
--
1.7.1.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
2012-09-21 12:20 [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver Venu Byravarasu
@ 2012-09-21 13:09 ` ABRAHAM, KISHON VIJAY
2012-09-21 16:14 ` Stephen Warren
2012-09-21 17:46 ` Stephen Warren
1 sibling, 1 reply; 8+ messages in thread
From: ABRAHAM, KISHON VIJAY @ 2012-09-21 13:09 UTC (permalink / raw)
To: Venu Byravarasu; +Cc: balbi, gregkh, linux-kernel, linux-usb
Hi,
On Fri, Sep 21, 2012 at 5:50 PM, Venu Byravarasu <vbyravarasu@nvidia.com> wrote:
> NVIDIA produces several Tegra SoCs viz Tegra20, Tegra30 etc.
> In order to support USB PHY drivers on these SoCs, existing
> PHY driver is split into SoC agnostic common USB PHY driver
> and Tegra20-specific USB phy driver. This will facilitate
> easy addition and deletion of phy drivers for Tegra SoCs.
>
> Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
> ---
> delta from v2:
>
> Added an if condition to check for device_node to be not NULL,
> before dereferencing it.
>
> drivers/usb/host/ehci-tegra.c | 26 +-
> drivers/usb/phy/Makefile | 1 +
> .../usb/phy/{tegra_usb_phy.c => tegra2_usb_phy.c} | 421 +++----------
> drivers/usb/phy/tegra2_usb_phy.h | 140 ++++
> drivers/usb/phy/tegra_usb_phy.c | 688 +-------------------
> include/linux/usb/tegra_usb_phy.h | 34 +-
> 6 files changed, 298 insertions(+), 1012 deletions(-)
> copy drivers/usb/phy/{tegra_usb_phy.c => tegra2_usb_phy.c} (53%)
> create mode 100644 drivers/usb/phy/tegra2_usb_phy.h
>
> diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
> index 6223d17..8199a6e 100644
> --- a/drivers/usb/host/ehci-tegra.c
> +++ b/drivers/usb/host/ehci-tegra.c
> @@ -618,6 +618,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
> int err = 0;
> int irq;
> int instance = pdev->id;
> + struct device_node *np = pdev->dev.of_node;
> + struct phy_params params;
> + int phy_type;
>
> pdata = pdev->dev.platform_data;
> if (!pdata) {
> @@ -701,14 +704,29 @@ static int tegra_ehci_probe(struct platform_device *pdev)
> break;
> default:
> err = -ENODEV;
> - dev_err(&pdev->dev, "unknown usb instance\n");
> + dev_err(&pdev->dev, "unknown usb inst:%d\n", instance);
> goto fail_io;
> }
> }
>
> + if (np) {
> + phy_type = of_property_match_string(np, "phy_type", "utmi");
> + if (phy_type >= 0)
> + params.type = TEGRA_USB_PHY_TYPE_UTMI;
> + else {
> + phy_type = of_property_match_string(np, "phy_type", "ulpi");
> + if (phy_type >= 0)
> + params.type = TEGRA_USB_PHY_TYPE_ULPI;
> + else
> + params.type = TEGRA_USB_PHY_TYPE_INVALID;
> + }
> + }
> +
> + params.mode = TEGRA_USB_PHY_MODE_HOST;
> + params.config = pdata->phy_config;
I fail to understand how pdata is not NULL in dt boot. I know i've
already given this comment and you replied that you dint see any
crash. But I'd like to know where and how pdata gets populated.
Thanks
Kishon
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
2012-09-21 13:09 ` ABRAHAM, KISHON VIJAY
@ 2012-09-21 16:14 ` Stephen Warren
2012-09-22 8:38 ` Venu Byravarasu
0 siblings, 1 reply; 8+ messages in thread
From: Stephen Warren @ 2012-09-21 16:14 UTC (permalink / raw)
To: ABRAHAM, KISHON VIJAY
Cc: Venu Byravarasu, balbi, gregkh, linux-kernel, linux-usb
On 09/21/2012 07:09 AM, ABRAHAM, KISHON VIJAY wrote:
> Hi,
>
> On Fri, Sep 21, 2012 at 5:50 PM, Venu Byravarasu <vbyravarasu@nvidia.com> wrote:
>> NVIDIA produces several Tegra SoCs viz Tegra20, Tegra30 etc.
>> In order to support USB PHY drivers on these SoCs, existing
>> PHY driver is split into SoC agnostic common USB PHY driver
>> and Tegra20-specific USB phy driver. This will facilitate
>> easy addition and deletion of phy drivers for Tegra SoCs.
>> @@ -618,6 +618,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
...
>> pdata = pdev->dev.platform_data;
>> if (!pdata) {
Some missing lines of context are:
dev_err(&pdev->dev, "Platform data missing\n");
return -EINVAL;
}
...
>> + params.mode = TEGRA_USB_PHY_MODE_HOST;
>> + params.config = pdata->phy_config;
>
> I fail to understand how pdata is not NULL in dt boot. I know i've
> already given this comment and you replied that you dint see any
> crash. But I'd like to know where and how pdata gets populated.
In practice, the platform uses AUXDATA to provide platform data to the
driver even when it's instantiated using device tree; see
arch/arm/mach-tegra/board-dt-tegra20.c variables tegra_ehci*_pdata and
tegra20_auxdata_lookup[].
In the slightly (very very slightly, hopefully) longer term, I would
like to completely remove the AUXDATA setup from board-dt-tegra20.c;
tegra_ehci_probe() should do something like:
pdata = pdev->dev.platform_data
if (!pdata)
pdata = parse_pdata_from_dt();
/* user didn't specify any in DT either */
if (!pdata)
pdata = default_pdata_for_port();
... where perhaps the use of defaults could be folded into
parse_pdata_from_dt().
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
2012-09-21 12:20 [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver Venu Byravarasu
2012-09-21 13:09 ` ABRAHAM, KISHON VIJAY
@ 2012-09-21 17:46 ` Stephen Warren
1 sibling, 0 replies; 8+ messages in thread
From: Stephen Warren @ 2012-09-21 17:46 UTC (permalink / raw)
To: Venu Byravarasu; +Cc: balbi, gregkh, linux-kernel, linux-usb
On 09/21/2012 06:20 AM, Venu Byravarasu wrote:
> NVIDIA produces several Tegra SoCs viz Tegra20, Tegra30 etc.
> In order to support USB PHY drivers on these SoCs, existing
> PHY driver is split into SoC agnostic common USB PHY driver
> and Tegra20-specific USB phy driver. This will facilitate
> easy addition and deletion of phy drivers for Tegra SoCs.
>
> Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
> ---
> delta from v2:
>
> Added an if condition to check for device_node to be not NULL,
> before dereferencing it.
I suppose that doesn't hurt, but it's not strictly needed; this code
will only ever run on systems that boot using device tree now.
^ permalink raw reply [flat|nested] 8+ messages in thread
* RE: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
2012-09-21 16:14 ` Stephen Warren
@ 2012-09-22 8:38 ` Venu Byravarasu
2012-09-24 6:18 ` ABRAHAM, KISHON VIJAY
0 siblings, 1 reply; 8+ messages in thread
From: Venu Byravarasu @ 2012-09-22 8:38 UTC (permalink / raw)
To: Stephen Warren, ABRAHAM, KISHON VIJAY
Cc: balbi, gregkh, linux-kernel, linux-usb
> -----Original Message-----
> From: Stephen Warren [mailto:swarren@wwwdotorg.org]
> Sent: Friday, September 21, 2012 9:45 PM
> To: ABRAHAM, KISHON VIJAY
> Cc: Venu Byravarasu; balbi@ti.com; gregkh@linuxfoundation.org; linux-
> kernel@vger.kernel.org; linux-usb@vger.kernel.org
> Subject: Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
>
> On 09/21/2012 07:09 AM, ABRAHAM, KISHON VIJAY wrote:
> > Hi,
> >
> > On Fri, Sep 21, 2012 at 5:50 PM, Venu Byravarasu
> <vbyravarasu@nvidia.com> wrote:
> >> NVIDIA produces several Tegra SoCs viz Tegra20, Tegra30 etc.
> >> In order to support USB PHY drivers on these SoCs, existing
> >> PHY driver is split into SoC agnostic common USB PHY driver
> >> and Tegra20-specific USB phy driver. This will facilitate
> >> easy addition and deletion of phy drivers for Tegra SoCs.
>
> >> @@ -618,6 +618,9 @@ static int tegra_ehci_probe(struct platform_device
> *pdev)
> ...
> >> pdata = pdev->dev.platform_data;
> >> if (!pdata) {
>
> Some missing lines of context are:
>
> dev_err(&pdev->dev, "Platform data missing\n");
> return -EINVAL;
> }
>
> ...
> >> + params.mode = TEGRA_USB_PHY_MODE_HOST;
> >> + params.config = pdata->phy_config;
> >
> > I fail to understand how pdata is not NULL in dt boot. I know i've
> > already given this comment and you replied that you dint see any
> > crash. But I'd like to know where and how pdata gets populated.
>
> In practice, the platform uses AUXDATA to provide platform data to the
> driver even when it's instantiated using device tree; see
> arch/arm/mach-tegra/board-dt-tegra20.c variables tegra_ehci*_pdata and
> tegra20_auxdata_lookup[].
>
> In the slightly (very very slightly, hopefully) longer term, I would
> like to completely remove the AUXDATA setup from board-dt-tegra20.c;
> tegra_ehci_probe() should do something like:
>
> pdata = pdev->dev.platform_data
> if (!pdata)
> pdata = parse_pdata_from_dt();
> /* user didn't specify any in DT either */
> if (!pdata)
> pdata = default_pdata_for_port();
>
> ... where perhaps the use of defaults could be folded into
> parse_pdata_from_dt().
Thanks Stephen for the detailed explanation.
Kishon / Felipe,
Do you have any more questions in this related, before patch can be applied?
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
2012-09-22 8:38 ` Venu Byravarasu
@ 2012-09-24 6:18 ` ABRAHAM, KISHON VIJAY
2012-09-24 6:20 ` Venu Byravarasu
2012-09-25 11:14 ` Venu Byravarasu
0 siblings, 2 replies; 8+ messages in thread
From: ABRAHAM, KISHON VIJAY @ 2012-09-24 6:18 UTC (permalink / raw)
To: Venu Byravarasu; +Cc: Stephen Warren, balbi, gregkh, linux-kernel, linux-usb
Hi,
On Sat, Sep 22, 2012 at 2:08 PM, Venu Byravarasu <vbyravarasu@nvidia.com> wrote:
>> -----Original Message-----
>> From: Stephen Warren [mailto:swarren@wwwdotorg.org]
>> Sent: Friday, September 21, 2012 9:45 PM
>> To: ABRAHAM, KISHON VIJAY
>> Cc: Venu Byravarasu; balbi@ti.com; gregkh@linuxfoundation.org; linux-
>> kernel@vger.kernel.org; linux-usb@vger.kernel.org
>> Subject: Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
>>
>> On 09/21/2012 07:09 AM, ABRAHAM, KISHON VIJAY wrote:
>> > Hi,
>> >
>> > On Fri, Sep 21, 2012 at 5:50 PM, Venu Byravarasu
>> <vbyravarasu@nvidia.com> wrote:
>> >> NVIDIA produces several Tegra SoCs viz Tegra20, Tegra30 etc.
>> >> In order to support USB PHY drivers on these SoCs, existing
>> >> PHY driver is split into SoC agnostic common USB PHY driver
>> >> and Tegra20-specific USB phy driver. This will facilitate
>> >> easy addition and deletion of phy drivers for Tegra SoCs.
>>
>> >> @@ -618,6 +618,9 @@ static int tegra_ehci_probe(struct platform_device
>> *pdev)
>> ...
>> >> pdata = pdev->dev.platform_data;
>> >> if (!pdata) {
>>
>> Some missing lines of context are:
>>
>> dev_err(&pdev->dev, "Platform data missing\n");
>> return -EINVAL;
>> }
>>
>> ...
>> >> + params.mode = TEGRA_USB_PHY_MODE_HOST;
>> >> + params.config = pdata->phy_config;
>> >
>> > I fail to understand how pdata is not NULL in dt boot. I know i've
>> > already given this comment and you replied that you dint see any
>> > crash. But I'd like to know where and how pdata gets populated.
>>
>> In practice, the platform uses AUXDATA to provide platform data to the
>> driver even when it's instantiated using device tree; see
>> arch/arm/mach-tegra/board-dt-tegra20.c variables tegra_ehci*_pdata and
>> tegra20_auxdata_lookup[].
>>
>> In the slightly (very very slightly, hopefully) longer term, I would
>> like to completely remove the AUXDATA setup from board-dt-tegra20.c;
>> tegra_ehci_probe() should do something like:
>>
>> pdata = pdev->dev.platform_data
>> if (!pdata)
>> pdata = parse_pdata_from_dt();
>> /* user didn't specify any in DT either */
>> if (!pdata)
>> pdata = default_pdata_for_port();
>>
>> ... where perhaps the use of defaults could be folded into
>> parse_pdata_from_dt().
>
>
> Thanks Stephen for the detailed explanation.
>
> Kishon / Felipe,
> Do you have any more questions in this related, before patch can be applied?
I don't have any further comments.
Thanks
Kishon
^ permalink raw reply [flat|nested] 8+ messages in thread
* RE: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
2012-09-24 6:18 ` ABRAHAM, KISHON VIJAY
@ 2012-09-24 6:20 ` Venu Byravarasu
2012-09-25 11:14 ` Venu Byravarasu
1 sibling, 0 replies; 8+ messages in thread
From: Venu Byravarasu @ 2012-09-24 6:20 UTC (permalink / raw)
To: ABRAHAM, KISHON VIJAY
Cc: Stephen Warren, balbi, gregkh, linux-kernel, linux-usb
> -----Original Message-----
> From: ABRAHAM, KISHON VIJAY [mailto:kishon@ti.com]
> Sent: Monday, September 24, 2012 11:48 AM
> To: Venu Byravarasu
> Cc: Stephen Warren; balbi@ti.com; gregkh@linuxfoundation.org; linux-
> kernel@vger.kernel.org; linux-usb@vger.kernel.org
> Subject: Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
>
> Hi,
>
> On Sat, Sep 22, 2012 at 2:08 PM, Venu Byravarasu
> <vbyravarasu@nvidia.com> wrote:
> >> -----Original Message-----
> >> From: Stephen Warren [mailto:swarren@wwwdotorg.org]
> >> Sent: Friday, September 21, 2012 9:45 PM
> >> To: ABRAHAM, KISHON VIJAY
> >> Cc: Venu Byravarasu; balbi@ti.com; gregkh@linuxfoundation.org; linux-
> >> kernel@vger.kernel.org; linux-usb@vger.kernel.org
> >> Subject: Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
> >>
> >> On 09/21/2012 07:09 AM, ABRAHAM, KISHON VIJAY wrote:
> >> > Hi,
> >> >
> >> > On Fri, Sep 21, 2012 at 5:50 PM, Venu Byravarasu
> >> <vbyravarasu@nvidia.com> wrote:
> >> >> NVIDIA produces several Tegra SoCs viz Tegra20, Tegra30 etc.
> >> >> In order to support USB PHY drivers on these SoCs, existing
> >> >> PHY driver is split into SoC agnostic common USB PHY driver
> >> >> and Tegra20-specific USB phy driver. This will facilitate
> >> >> easy addition and deletion of phy drivers for Tegra SoCs.
> >>
> >> >> @@ -618,6 +618,9 @@ static int tegra_ehci_probe(struct
> platform_device
> >> *pdev)
> >> ...
> >> >> pdata = pdev->dev.platform_data;
> >> >> if (!pdata) {
> >>
> >> Some missing lines of context are:
> >>
> >> dev_err(&pdev->dev, "Platform data missing\n");
> >> return -EINVAL;
> >> }
> >>
> >> ...
> >> >> + params.mode = TEGRA_USB_PHY_MODE_HOST;
> >> >> + params.config = pdata->phy_config;
> >> >
> >> > I fail to understand how pdata is not NULL in dt boot. I know i've
> >> > already given this comment and you replied that you dint see any
> >> > crash. But I'd like to know where and how pdata gets populated.
> >>
> >> In practice, the platform uses AUXDATA to provide platform data to the
> >> driver even when it's instantiated using device tree; see
> >> arch/arm/mach-tegra/board-dt-tegra20.c variables tegra_ehci*_pdata
> and
> >> tegra20_auxdata_lookup[].
> >>
> >> In the slightly (very very slightly, hopefully) longer term, I would
> >> like to completely remove the AUXDATA setup from board-dt-tegra20.c;
> >> tegra_ehci_probe() should do something like:
> >>
> >> pdata = pdev->dev.platform_data
> >> if (!pdata)
> >> pdata = parse_pdata_from_dt();
> >> /* user didn't specify any in DT either */
> >> if (!pdata)
> >> pdata = default_pdata_for_port();
> >>
> >> ... where perhaps the use of defaults could be folded into
> >> parse_pdata_from_dt().
> >
> >
> > Thanks Stephen for the detailed explanation.
> >
> > Kishon / Felipe,
> > Do you have any more questions in this related, before patch can be
> applied?
>
> I don't have any further comments.
>
Thanks Kishon for your quick response.
> Thanks
> Kishon
^ permalink raw reply [flat|nested] 8+ messages in thread
* RE: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
2012-09-24 6:18 ` ABRAHAM, KISHON VIJAY
2012-09-24 6:20 ` Venu Byravarasu
@ 2012-09-25 11:14 ` Venu Byravarasu
1 sibling, 0 replies; 8+ messages in thread
From: Venu Byravarasu @ 2012-09-25 11:14 UTC (permalink / raw)
To: balbi
Cc: Stephen Warren, gregkh, linux-kernel, linux-usb, ABRAHAM, KISHON VIJAY
> -----Original Message-----
> From: ABRAHAM, KISHON VIJAY [mailto:kishon@ti.com]
> Sent: Monday, September 24, 2012 11:48 AM
> To: Venu Byravarasu
> Cc: Stephen Warren; balbi@ti.com; gregkh@linuxfoundation.org; linux-
> kernel@vger.kernel.org; linux-usb@vger.kernel.org
> Subject: Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
>
> Hi,
>
> On Sat, Sep 22, 2012 at 2:08 PM, Venu Byravarasu
> <vbyravarasu@nvidia.com> wrote:
> >> -----Original Message-----
> >> From: Stephen Warren [mailto:swarren@wwwdotorg.org]
> >> Sent: Friday, September 21, 2012 9:45 PM
> >> To: ABRAHAM, KISHON VIJAY
> >> Cc: Venu Byravarasu; balbi@ti.com; gregkh@linuxfoundation.org; linux-
> >> kernel@vger.kernel.org; linux-usb@vger.kernel.org
> >> Subject: Re: [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver
> >>
> >> On 09/21/2012 07:09 AM, ABRAHAM, KISHON VIJAY wrote:
> >> > Hi,
> >> >
...
> >>
> >> ... where perhaps the use of defaults could be folded into
> >> parse_pdata_from_dt().
> >
> >
> > Thanks Stephen for the detailed explanation.
> >
> > Kishon / Felipe,
> > Do you have any more questions in this related, before patch can be
> applied?
>
> I don't have any further comments.
>
> Thanks
> Kishon
Felipe,
Can you plz merge this patch, if you don't have any objections?
Thanks,
Venu
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2012-09-25 11:14 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-09-21 12:20 [PATCH v3] USB: PHY: Re-organize Tegra USB PHY driver Venu Byravarasu
2012-09-21 13:09 ` ABRAHAM, KISHON VIJAY
2012-09-21 16:14 ` Stephen Warren
2012-09-22 8:38 ` Venu Byravarasu
2012-09-24 6:18 ` ABRAHAM, KISHON VIJAY
2012-09-24 6:20 ` Venu Byravarasu
2012-09-25 11:14 ` Venu Byravarasu
2012-09-21 17:46 ` Stephen Warren
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