diff options
| -rw-r--r-- | arch/arm/mach-imx/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/imx1.c | 27 | ||||
| -rw-r--r-- | arch/arm/mach-imx/reset_source.c | 72 | ||||
| -rw-r--r-- | drivers/watchdog/imxwd.c | 34 |
4 files changed, 61 insertions, 73 deletions
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index e43f92e430..517a5a766f 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -1,5 +1,4 @@ obj-y += clocksource.o gpio.o -obj-$(CONFIG_RESET_SOURCE) += reset_source.o obj-$(CONFIG_ARCH_IMX1) += imx1.o iomux-v1.o clk-imx1.o obj-$(CONFIG_ARCH_IMX25) += imx25.o iomux-v3.o clk-imx25.o obj-$(CONFIG_ARCH_IMX21) += imx21.o iomux-v1.o clk-imx21.o diff --git a/arch/arm/mach-imx/imx1.c b/arch/arm/mach-imx/imx1.c index 2b2b924676..7ac16fd818 100644 --- a/arch/arm/mach-imx/imx1.c +++ b/arch/arm/mach-imx/imx1.c @@ -16,6 +16,31 @@ #include <io.h> #include <mach/imx-regs.h> #include <mach/weim.h> +#include <reset_source.h> + +#define MX1_RSR MX1_SCM_BASE_ADDR +#define RSR_EXR (1 << 0) +#define RSR_WDR (1 << 1) + +static void imx1_detect_reset_source(void) +{ + u32 val = readl((void *)MX1_RSR) & 0x3; + + switch (val) { + case RSR_EXR: + set_reset_source(RESET_RST); + return; + case RSR_WDR: + set_reset_source(RESET_WDG); + return; + case 0: + set_reset_source(RESET_POR); + return; + default: + /* else keep the default 'unknown' state */ + return; + } +} void imx1_setup_eimcs(size_t cs, unsigned upper, unsigned lower) { @@ -25,6 +50,8 @@ void imx1_setup_eimcs(size_t cs, unsigned upper, unsigned lower) static int imx1_init(void) { + imx1_detect_reset_source(); + add_generic_device("imx1-ccm", 0, NULL, MX1_CCM_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL); add_generic_device("imx1-gpt", 0, NULL, MX1_TIM1_BASE_ADDR, 0x100, IORESOURCE_MEM, NULL); add_generic_device("imx1-gpio", 0, NULL, MX1_GPIO1_BASE_ADDR, 0x100, IORESOURCE_MEM, NULL); diff --git a/arch/arm/mach-imx/reset_source.c b/arch/arm/mach-imx/reset_source.c deleted file mode 100644 index e7b2a906c5..0000000000 --- a/arch/arm/mach-imx/reset_source.c +++ /dev/null @@ -1,72 +0,0 @@ -/* - * (C) Copyright 2012 Juergen Beisert - <kernel@pengutronix.de> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * 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 <common.h> -#include <init.h> -#include <io.h> -#include <reset_source.h> -#include <mach/imx-regs.h> - -#ifdef CONFIG_ARCH_IMX1 -# define IMX_RESET_SRC_WDOG (1 << 1) -# define IMX_RESET_SRC_HRDRESET (1 << 0) -/* let the compiler sort out useless code on this arch */ -# define IMX_RESET_SRC_WARMSTART 0 -# define IMX_RESET_SRC_COLDSTART 0 -#else - /* WRSR checked for i.MX25, i.MX27, i.MX31, i.MX35 and i.MX51 */ -# define WDOG_WRSR 0x04 - /* valid for i.MX25, i.MX27, i.MX31, i.MX35, i.MX51 */ -# define IMX_RESET_SRC_WARMSTART (1 << 0) - /* valid for i.MX25, i.MX27, i.MX31, i.MX35, i.MX51 */ -# define IMX_RESET_SRC_WDOG (1 << 1) - /* valid for i.MX27, i.MX31, always '0' on i.MX25, i.MX35, i.MX51 */ -# define IMX_RESET_SRC_HRDRESET (1 << 3) - /* valid for i.MX27, i.MX31, always '0' on i.MX25, i.MX35, i.MX51 */ -# define IMX_RESET_SRC_COLDSTART (1 << 4) -#endif - -static unsigned read_detection_register(void) -{ -#ifdef CONFIG_ARCH_IMX1 - return readl(IMX_SYSCTRL_BASE); -#else - return readw(IMX_WDT_BASE + WDOG_WRSR); -#endif -} - -static int imx_detect_reset_source(void) -{ - unsigned reg = read_detection_register(); - - if (reg & IMX_RESET_SRC_COLDSTART) { - set_reset_source(RESET_POR); - return 0; - } - - if (reg & (IMX_RESET_SRC_HRDRESET | IMX_RESET_SRC_WARMSTART)) { - set_reset_source(RESET_RST); - return 0; - } - - if (reg & IMX_RESET_SRC_WDOG) { - set_reset_source(RESET_WDG); - return 0; - } - - /* else keep the default 'unknown' state */ - return 0; -} - -device_initcall(imx_detect_reset_source); diff --git a/drivers/watchdog/imxwd.c b/drivers/watchdog/imxwd.c index 7bbb86c405..c422f9819c 100644 --- a/drivers/watchdog/imxwd.c +++ b/drivers/watchdog/imxwd.c @@ -42,6 +42,15 @@ struct imx_wd { #define IMX21_WDOG_WCR_SRS (1 << 4) #define IMX21_WDOG_WCR_WDA (1 << 5) +/* valid for i.MX25, i.MX27, i.MX31, i.MX35, i.MX51 */ +#define WSTR_WARMSTART (1 << 0) +/* valid for i.MX25, i.MX27, i.MX31, i.MX35, i.MX51 */ +#define WSTR_WDOG (1 << 1) +/* valid for i.MX27, i.MX31, always '0' on i.MX25, i.MX35, i.MX51 */ +#define WSTR_HARDRESET (1 << 3) +/* valid for i.MX27, i.MX31, always '0' on i.MX25, i.MX35, i.MX51 */ +#define WSTR_COLDSTART (1 << 4) + static int imx1_watchdog_set_timeout(struct imx_wd *priv, int timeout) { u16 val; @@ -115,6 +124,28 @@ void __noreturn reset_cpu(unsigned long addr) hang(); } +static void imx_watchdog_detect_reset_source(struct imx_wd *priv) +{ + u16 val = readw(priv->base + IMX21_WDOG_WSTR); + + if (val & WSTR_COLDSTART) { + set_reset_source(RESET_POR); + return; + } + + if (val & (WSTR_HARDRESET | WSTR_WARMSTART)) { + set_reset_source(RESET_RST); + return; + } + + if (val & WSTR_WDOG) { + set_reset_source(RESET_WDG); + return; + } + + /* else keep the default 'unknown' state */ +} + static int imx_wd_probe(struct device_d *dev) { struct imx_wd *priv; @@ -140,6 +171,9 @@ static int imx_wd_probe(struct device_d *dev) goto on_error; } + if (fn != imx1_watchdog_set_timeout) + imx_watchdog_detect_reset_source(priv); + dev->priv = priv; return 0; |