* [U-Boot] [PATCH v3] misc: Add simple driver for some Nuvoton NCT6102D devices
@ 2016-07-19 5:45 Stefan Roese
2016-08-01 0:48 ` Bin Meng
0 siblings, 1 reply; 2+ messages in thread
From: Stefan Roese @ 2016-07-19 5:45 UTC (permalink / raw)
To: u-boot
This simple driver provides some functions to control some of the
integrated devices. The watchdog is enabled per default. This driver
adds a function to disable the watchdog. Also the internal legacy
UART (io address 0x3f8/0x2f8) is enabled per default.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
---
v3:
- Remove misleading comment about UART
v2:
- Added macros for the constants as suggested by Bin
- Changed macro names as suggested by Bin
drivers/misc/Kconfig | 8 ++++++
drivers/misc/Makefile | 1 +
drivers/misc/nuvoton_nct6102d.c | 56 +++++++++++++++++++++++++++++++++++++++++
include/nuvoton_nct6102d.h | 34 +++++++++++++++++++++++++
4 files changed, 99 insertions(+)
create mode 100644 drivers/misc/nuvoton_nct6102d.c
create mode 100644 include/nuvoton_nct6102d.h
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 2373037..5d212a3 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -90,6 +90,14 @@ config MXC_OCOTP
Programmable memory pages that are stored on the some
Freescale i.MX processors.
+config NUVOTON_NCT6102D
+ bool "Enable Nuvoton NCT6102D Super I/O driver"
+ help
+ If you say Y here, you will get support for the Nuvoton
+ NCT6102D Super I/O driver. This can be used to enable or
+ disable the legacy UART, the watchdog or other devices
+ in the Nuvoton Super IO chips on X86 platforms.
+
config PWRSEQ
bool "Enable power-sequencing drivers"
depends on DM
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 066639b..1b0c7b6 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_I2C_EEPROM) += i2c_eeprom.o
obj-$(CONFIG_FSL_MC9SDZ60) += mc9sdz60.o
obj-$(CONFIG_MXC_OCOTP) += mxc_ocotp.o
obj-$(CONFIG_MXS_OCOTP) += mxs_ocotp.o
+obj-$(CONFIG_NUVOTON_NCT6102D) += nuvoton_nct6102d.o
obj-$(CONFIG_NS87308) += ns87308.o
obj-$(CONFIG_PDSP188x) += pdsp188x.o
obj-$(CONFIG_$(SPL_)PWRSEQ) += pwrseq-uclass.o
diff --git a/drivers/misc/nuvoton_nct6102d.c b/drivers/misc/nuvoton_nct6102d.c
new file mode 100644
index 0000000..ced70f1
--- /dev/null
+++ b/drivers/misc/nuvoton_nct6102d.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <nuvoton_nct6102d.h>
+#include <asm/io.h>
+#include <asm/pnp_def.h>
+
+static void superio_outb(int reg, int val)
+{
+ outb(reg, NCT_EFER);
+ outb(val, NCT_EFDR);
+}
+
+static inline int superio_inb(int reg)
+{
+ outb(reg, NCT_EFER);
+ return inb(NCT_EFDR);
+}
+
+static int superio_enter(void)
+{
+ outb(NCT_ENTRY_KEY, NCT_EFER); /* Enter extended function mode */
+ outb(NCT_ENTRY_KEY, NCT_EFER); /* Again according to manual */
+
+ return 0;
+}
+
+static void superio_select(int ld)
+{
+ superio_outb(NCT_LD_SELECT_REG, ld);
+}
+
+static void superio_exit(void)
+{
+ outb(NCT_EXIT_KEY, NCT_EFER); /* Leave extended function mode */
+}
+
+/*
+ * The Nuvoton NCT6102D starts per default after reset with both,
+ * the internal watchdog and the internal legacy UART enabled. This
+ * code provides a function to disable the watchdog.
+ */
+int nct6102d_wdt_disable(void)
+{
+ superio_enter();
+ /* Select logical device for WDT */
+ superio_select(NCT6102D_LD_WDT);
+ superio_outb(NCT6102D_WDT_TIMEOUT, 0x00);
+ superio_exit();
+
+ return 0;
+}
diff --git a/include/nuvoton_nct6102d.h b/include/nuvoton_nct6102d.h
new file mode 100644
index 0000000..a122550
--- /dev/null
+++ b/include/nuvoton_nct6102d.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _NUVOTON_NCT6102D_H_
+#define _NUVOTON_NCT6102D_H_
+
+/* I/O address of Nuvoton Super IO chip */
+#define NCT6102D_IO_PORT 0x4e
+
+/* Extended Function Enable Registers */
+#define NCT_EFER (NCT6102D_IO_PORT + 0)
+/* Extended Function Index Register (same as EFER) */
+#define NCT_EFIR (NCT6102D_IO_PORT + 0)
+/* Extended Function Data Register */
+#define NCT_EFDR (NCT_EFIR + 1)
+
+#define NCT_LD_SELECT_REG 0x07
+
+/* Logical device number */
+#define NCT6102D_LD_UARTA 0x02
+#define NCT6102D_LD_WDT 0x08
+
+#define NCT6102D_UARTA_ENABLE 0x30
+#define NCT6102D_WDT_TIMEOUT 0xf1
+
+#define NCT_ENTRY_KEY 0x87
+#define NCT_EXIT_KEY 0xaa
+
+int nct6102d_wdt_disable(void);
+
+#endif /* _NUVOTON_NCT6102D_H_ */
--
2.9.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [U-Boot] [PATCH v3] misc: Add simple driver for some Nuvoton NCT6102D devices
2016-07-19 5:45 [U-Boot] [PATCH v3] misc: Add simple driver for some Nuvoton NCT6102D devices Stefan Roese
@ 2016-08-01 0:48 ` Bin Meng
0 siblings, 0 replies; 2+ messages in thread
From: Bin Meng @ 2016-08-01 0:48 UTC (permalink / raw)
To: u-boot
On Tue, Jul 19, 2016 at 1:45 PM, Stefan Roese <sr@denx.de> wrote:
> This simple driver provides some functions to control some of the
> integrated devices. The watchdog is enabled per default. This driver
> adds a function to disable the watchdog. Also the internal legacy
> UART (io address 0x3f8/0x2f8) is enabled per default.
>
> Signed-off-by: Stefan Roese <sr@denx.de>
> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
> Cc: Simon Glass <sjg@chromium.org>
> ---
> v3:
> - Remove misleading comment about UART
>
> v2:
> - Added macros for the constants as suggested by Bin
> - Changed macro names as suggested by Bin
>
> drivers/misc/Kconfig | 8 ++++++
> drivers/misc/Makefile | 1 +
> drivers/misc/nuvoton_nct6102d.c | 56 +++++++++++++++++++++++++++++++++++++++++
> include/nuvoton_nct6102d.h | 34 +++++++++++++++++++++++++
> 4 files changed, 99 insertions(+)
> create mode 100644 drivers/misc/nuvoton_nct6102d.c
> create mode 100644 include/nuvoton_nct6102d.h
>
applied to u-boot-x86, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-07-19 5:45 [U-Boot] [PATCH v3] misc: Add simple driver for some Nuvoton NCT6102D devices Stefan Roese
2016-08-01 0:48 ` Bin Meng
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