From 55fb6f3a05deb4a8b5e600cc10bae9555a9f90be Mon Sep 17 00:00:00 2001 From: John Crispin Date: Sun, 23 Jun 2013 15:50:49 +0000 Subject: ralink: update patches Signed-off-by: John Crispin SVN-Revision: 37016 --- .../0065-watchdog-adds-ralink-wdt.patch | 275 +++++++++++++++++++++ 1 file changed, 275 insertions(+) create mode 100644 target/linux/ramips/patches-3.8/0065-watchdog-adds-ralink-wdt.patch (limited to 'target/linux/ramips/patches-3.8/0065-watchdog-adds-ralink-wdt.patch') diff --git a/target/linux/ramips/patches-3.8/0065-watchdog-adds-ralink-wdt.patch b/target/linux/ramips/patches-3.8/0065-watchdog-adds-ralink-wdt.patch new file mode 100644 index 0000000000..5d446eea9b --- /dev/null +++ b/target/linux/ramips/patches-3.8/0065-watchdog-adds-ralink-wdt.patch @@ -0,0 +1,275 @@ +From 8eaa4bef40d38a4954389a2552504ea2d1c4a68a Mon Sep 17 00:00:00 2001 +From: John Crispin +Date: Mon, 22 Apr 2013 23:23:07 +0200 +Subject: [PATCH 65/79] watchdog: adds ralink wdt + +Adds the watchdog driver for ralink SoC. + +Signed-off-by: John Crispin +--- + arch/mips/ralink/mt7620.c | 1 + + drivers/watchdog/Kconfig | 7 ++ + drivers/watchdog/Makefile | 1 + + drivers/watchdog/rt2880_wdt.c | 208 +++++++++++++++++++++++++++++++++++++++++ + 4 files changed, 217 insertions(+) + create mode 100644 drivers/watchdog/rt2880_wdt.c + +diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c +index 08c96db6..4956d96 100644 +--- a/arch/mips/ralink/mt7620.c ++++ b/arch/mips/ralink/mt7620.c +@@ -182,6 +182,7 @@ void __init ralink_clk_init(void) + + ralink_clk_add("cpu", cpu_rate); + ralink_clk_add("10000100.timer", 40000000); ++ ralink_clk_add("10000120.watchdog", 40000000); + ralink_clk_add("10000500.uart", 40000000); + ralink_clk_add("10000b00.spi", 40000000); + ralink_clk_add("10000c00.uartlite", 40000000); +diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig +index 7f809fd..c8c7454 100644 +--- a/drivers/watchdog/Kconfig ++++ b/drivers/watchdog/Kconfig +@@ -1076,6 +1076,13 @@ config LANTIQ_WDT + help + Hardware driver for the Lantiq SoC Watchdog Timer. + ++config RALINK_WDT ++ tristate "Ralink SoC watchdog" ++ select WATCHDOG_CORE ++ depends on RALINK ++ help ++ Hardware driver for the Ralink SoC Watchdog Timer. ++ + # PARISC Architecture + + # POWERPC Architecture +diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile +index 97bbdb3a..0203784 100644 +--- a/drivers/watchdog/Makefile ++++ b/drivers/watchdog/Makefile +@@ -132,6 +132,7 @@ obj-$(CONFIG_TXX9_WDT) += txx9wdt.o + obj-$(CONFIG_OCTEON_WDT) += octeon-wdt.o + octeon-wdt-y := octeon-wdt-main.o octeon-wdt-nmi.o + obj-$(CONFIG_LANTIQ_WDT) += lantiq_wdt.o ++obj-$(CONFIG_RALINK_WDT) += rt2880_wdt.o + + # PARISC Architecture + +diff --git a/drivers/watchdog/rt2880_wdt.c b/drivers/watchdog/rt2880_wdt.c +new file mode 100644 +index 0000000..3df65a4 +--- /dev/null ++++ b/drivers/watchdog/rt2880_wdt.c +@@ -0,0 +1,208 @@ ++/* ++ * Ralink RT288x/RT3xxx/MT76xx built-in hardware watchdog timer ++ * ++ * Copyright (C) 2011 Gabor Juhos ++ * Copyright (C) 2013 John Crispin ++ * ++ * This driver was based on: drivers/watchdog/softdog.c ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published ++ * by the Free Software Foundation. ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#include ++ ++#define SYSC_RSTSTAT 0x38 ++#define WDT_RST_CAUSE BIT(1) ++ ++#define RALINK_WDT_TIMEOUT 30 ++#define RALINK_WDT_PRESCALE 65536 ++ ++#define TIMER_REG_TMR1LOAD 0x00 ++#define TIMER_REG_TMR1CTL 0x08 ++ ++#define TMRSTAT_TMR1RST BIT(5) ++ ++#define TMR1CTL_ENABLE BIT(7) ++#define TMR1CTL_MODE_SHIFT 4 ++#define TMR1CTL_MODE_MASK 0x3 ++#define TMR1CTL_MODE_FREE_RUNNING 0x0 ++#define TMR1CTL_MODE_PERIODIC 0x1 ++#define TMR1CTL_MODE_TIMEOUT 0x2 ++#define TMR1CTL_MODE_WDT 0x3 ++#define TMR1CTL_PRESCALE_MASK 0xf ++#define TMR1CTL_PRESCALE_65536 0xf ++ ++static struct clk *rt288x_wdt_clk; ++static unsigned long rt288x_wdt_freq; ++static void __iomem *rt288x_wdt_base; ++ ++static bool nowayout = WATCHDOG_NOWAYOUT; ++module_param(nowayout, bool, 0); ++MODULE_PARM_DESC(nowayout, ++ "Watchdog cannot be stopped once started (default=" ++ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); ++ ++static inline void rt_wdt_w32(unsigned reg, u32 val) ++{ ++ iowrite32(val, rt288x_wdt_base + reg); ++} ++ ++static inline u32 rt_wdt_r32(unsigned reg) ++{ ++ return ioread32(rt288x_wdt_base + reg); ++} ++ ++static int rt288x_wdt_ping(struct watchdog_device *w) ++{ ++ rt_wdt_w32(TIMER_REG_TMR1LOAD, w->timeout * rt288x_wdt_freq); ++ ++ return 0; ++} ++ ++static int rt288x_wdt_start(struct watchdog_device *w) ++{ ++ u32 t; ++ ++ t = rt_wdt_r32(TIMER_REG_TMR1CTL); ++ t &= ~(TMR1CTL_MODE_MASK << TMR1CTL_MODE_SHIFT | ++ TMR1CTL_PRESCALE_MASK); ++ t |= (TMR1CTL_MODE_WDT << TMR1CTL_MODE_SHIFT | ++ TMR1CTL_PRESCALE_65536); ++ rt_wdt_w32(TIMER_REG_TMR1CTL, t); ++ ++ rt288x_wdt_ping(w); ++ ++ t = rt_wdt_r32(TIMER_REG_TMR1CTL); ++ t |= TMR1CTL_ENABLE; ++ rt_wdt_w32(TIMER_REG_TMR1CTL, t); ++ ++ return 0; ++} ++ ++static int rt288x_wdt_stop(struct watchdog_device *w) ++{ ++ u32 t; ++ ++ rt288x_wdt_ping(w); ++ ++ t = rt_wdt_r32(TIMER_REG_TMR1CTL); ++ t &= ~TMR1CTL_ENABLE; ++ rt_wdt_w32(TIMER_REG_TMR1CTL, t); ++ ++ return 0; ++} ++ ++static int rt288x_wdt_set_timeout(struct watchdog_device *w, unsigned int t) ++{ ++ w->timeout = t; ++ rt288x_wdt_ping(w); ++ ++ return 0; ++} ++ ++static int rt288x_wdt_bootcause(void) ++{ ++ if (rt_sysc_r32(SYSC_RSTSTAT) & WDT_RST_CAUSE) ++ return WDIOF_CARDRESET; ++ ++ return 0; ++} ++ ++static struct watchdog_info rt288x_wdt_info = { ++ .identity = "Ralink Watchdog", ++ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, ++}; ++ ++static struct watchdog_ops rt288x_wdt_ops = { ++ .owner = THIS_MODULE, ++ .start = rt288x_wdt_start, ++ .stop = rt288x_wdt_stop, ++ .ping = rt288x_wdt_ping, ++ .set_timeout = rt288x_wdt_set_timeout, ++}; ++ ++static struct watchdog_device rt288x_wdt_dev = { ++ .info = &rt288x_wdt_info, ++ .ops = &rt288x_wdt_ops, ++ .min_timeout = 1, ++}; ++ ++static int rt288x_wdt_probe(struct platform_device *pdev) ++{ ++ struct resource *res; ++ int ret; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ rt288x_wdt_base = devm_request_and_ioremap(&pdev->dev, res); ++ if (IS_ERR(rt288x_wdt_base)) ++ return PTR_ERR(rt288x_wdt_base); ++ ++ rt288x_wdt_clk = devm_clk_get(&pdev->dev, NULL); ++ if (IS_ERR(rt288x_wdt_clk)) ++ return PTR_ERR(rt288x_wdt_clk); ++ ++ device_reset(&pdev->dev); ++ ++ rt288x_wdt_freq = clk_get_rate(rt288x_wdt_clk) / RALINK_WDT_PRESCALE; ++ ++ rt288x_wdt_dev.dev = &pdev->dev; ++ rt288x_wdt_dev.bootstatus = rt288x_wdt_bootcause(); ++ ++ rt288x_wdt_dev.timeout = RALINK_WDT_TIMEOUT; ++ rt288x_wdt_dev.max_timeout = (0xfffful / rt288x_wdt_freq); ++ ++ watchdog_set_nowayout(&rt288x_wdt_dev, nowayout); ++ ++ ret = watchdog_register_device(&rt288x_wdt_dev); ++ if (!ret) ++ dev_info(&pdev->dev, "Initialized\n"); ++ ++ return 0; ++} ++ ++static int rt288x_wdt_remove(struct platform_device *pdev) ++{ ++ watchdog_unregister_device(&rt288x_wdt_dev); ++ ++ return 0; ++} ++ ++static void rt288x_wdt_shutdown(struct platform_device *pdev) ++{ ++ rt288x_wdt_stop(&rt288x_wdt_dev); ++} ++ ++static const struct of_device_id rt288x_wdt_match[] = { ++ { .compatible = "ralink,rt2880-wdt" }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, rt288x_wdt_match); ++ ++static struct platform_driver rt288x_wdt_driver = { ++ .probe = rt288x_wdt_probe, ++ .remove = rt288x_wdt_remove, ++ .shutdown = rt288x_wdt_shutdown, ++ .driver = { ++ .name = KBUILD_MODNAME, ++ .owner = THIS_MODULE, ++ .of_match_table = rt288x_wdt_match, ++ }, ++}; ++ ++module_platform_driver(rt288x_wdt_driver); ++ ++MODULE_DESCRIPTION("MediaTek/Ralink RT288x/RT3xxx hardware watchdog driver"); ++MODULE_AUTHOR("Gabor Juhos