From ed292123bc5c9a242273ad5e9251da05fc7377c6 Mon Sep 17 00:00:00 2001 From: blogic Date: Wed, 3 Apr 2013 09:58:44 +0000 Subject: [ramips] move files to files-3.7 Signed-off-by: John Crispin git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36161 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../ramips/files/drivers/watchdog/ramips_wdt.c | 355 --------------------- 1 file changed, 355 deletions(-) delete mode 100644 target/linux/ramips/files/drivers/watchdog/ramips_wdt.c (limited to 'target/linux/ramips/files/drivers/watchdog') diff --git a/target/linux/ramips/files/drivers/watchdog/ramips_wdt.c b/target/linux/ramips/files/drivers/watchdog/ramips_wdt.c deleted file mode 100644 index fa7e9e85e..000000000 --- a/target/linux/ramips/files/drivers/watchdog/ramips_wdt.c +++ /dev/null @@ -1,355 +0,0 @@ -/* - * Ralink RT288X/RT305X built-in hardware watchdog timer - * - * Copyright (C) 2011 Gabor Juhos - * - * This driver was based on: drivers/watchdog/ixp4xx_wdt.c - * Author: Deepak Saxena - * Copyright 2004 (c) MontaVista, Software, Inc. - * - * which again was based on sa1100 driver, - * Copyright (C) 2000 Oleg Drokin - * - * parts of the driver are based on Ralink's 2.6.21 BSP - * - * 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 -#include -#include -#include -#include - -#define DRIVER_NAME "ramips-wdt" - -#define RAMIPS_WDT_TIMEOUT 0 /* seconds */ -#define RAMIPS_WDT_PRESCALE 65536 - -#define TIMER_REG_TMRSTAT 0x00 -#define TIMER_REG_TMR1LOAD 0x20 -#define TIMER_REG_TMR1CTL 0x28 - -#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 int nowayout = WATCHDOG_NOWAYOUT; -module_param(nowayout, int, 0); -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started " - "(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); - -static int ramips_wdt_timeout = RAMIPS_WDT_TIMEOUT; -module_param_named(timeout, ramips_wdt_timeout, int, 0); -MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds, 0 means use maximum " - "(default=" __MODULE_STRING(RAMIPS_WDT_TIMEOUT) "s)"); - -static unsigned long ramips_wdt_flags; - -#define WDT_FLAGS_BUSY 0 -#define WDT_FLAGS_EXPECT_CLOSE 1 - -static struct clk *ramips_wdt_clk; -static unsigned long ramips_wdt_freq; -static int ramips_wdt_max_timeout; -static void __iomem *ramips_wdt_base; - -static inline void ramips_wdt_wr(unsigned reg, u32 val) -{ - __raw_writel(val, ramips_wdt_base + reg); -} - -static inline u32 ramips_wdt_rr(unsigned reg) -{ - return __raw_readl(ramips_wdt_base + reg); -} - -static inline void ramips_wdt_keepalive(void) -{ - ramips_wdt_wr(TIMER_REG_TMR1LOAD, ramips_wdt_timeout * ramips_wdt_freq); -} - -static inline void ramips_wdt_enable(void) -{ - u32 t; - - ramips_wdt_keepalive(); - - t = ramips_wdt_rr(TIMER_REG_TMR1CTL); - t |= TMR1CTL_ENABLE; - ramips_wdt_wr(TIMER_REG_TMR1CTL, t); -} - -static inline void ramips_wdt_disable(void) -{ - u32 t; - - ramips_wdt_keepalive(); - - t = ramips_wdt_rr(TIMER_REG_TMR1CTL); - t &= ~TMR1CTL_ENABLE; - ramips_wdt_wr(TIMER_REG_TMR1CTL, t); -} - -static int ramips_wdt_set_timeout(int val) -{ - if (val < 1 || val > ramips_wdt_max_timeout) { - pr_warn(DRIVER_NAME - ": timeout value %d must be 0 < timeout <= %d, using %d\n", - val, ramips_wdt_max_timeout, ramips_wdt_timeout); - return -EINVAL; - } - - ramips_wdt_timeout = val; - ramips_wdt_keepalive(); - - return 0; -} - -static int ramips_wdt_open(struct inode *inode, struct file *file) -{ - u32 t; - - if (test_and_set_bit(WDT_FLAGS_BUSY, &ramips_wdt_flags)) - return -EBUSY; - - clear_bit(WDT_FLAGS_EXPECT_CLOSE, &ramips_wdt_flags); - - t = ramips_wdt_rr(TIMER_REG_TMR1CTL); - t &= ~(TMR1CTL_MODE_MASK << TMR1CTL_MODE_SHIFT | - TMR1CTL_PRESCALE_MASK); - t |= (TMR1CTL_MODE_WDT << TMR1CTL_MODE_SHIFT | - TMR1CTL_PRESCALE_65536); - ramips_wdt_wr(TIMER_REG_TMR1CTL, t); - - ramips_wdt_enable(); - - return nonseekable_open(inode, file); -} - -static int ramips_wdt_release(struct inode *inode, struct file *file) -{ - if (test_bit(WDT_FLAGS_EXPECT_CLOSE, &ramips_wdt_flags)) - ramips_wdt_disable(); - else { - pr_crit(DRIVER_NAME ": device closed unexpectedly, " - "watchdog timer will not stop!\n"); - ramips_wdt_keepalive(); - } - - clear_bit(WDT_FLAGS_BUSY, &ramips_wdt_flags); - clear_bit(WDT_FLAGS_EXPECT_CLOSE, &ramips_wdt_flags); - - return 0; -} - -static ssize_t ramips_wdt_write(struct file *file, const char *data, - size_t len, loff_t *ppos) -{ - if (len) { - if (!nowayout) { - size_t i; - - clear_bit(WDT_FLAGS_EXPECT_CLOSE, &ramips_wdt_flags); - - for (i = 0; i != len; i++) { - char c; - - if (get_user(c, data + i)) - return -EFAULT; - - if (c == 'V') - set_bit(WDT_FLAGS_EXPECT_CLOSE, - &ramips_wdt_flags); - } - } - - ramips_wdt_keepalive(); - } - - return len; -} - -static const struct watchdog_info ramips_wdt_info = { - .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | - WDIOF_MAGICCLOSE, - .firmware_version = 0, - .identity = "RAMIPS watchdog", -}; - -static long ramips_wdt_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - void __user *argp = (void __user *)arg; - int __user *p = argp; - int err; - int t; - - switch (cmd) { - case WDIOC_GETSUPPORT: - err = copy_to_user(argp, &ramips_wdt_info, - sizeof(ramips_wdt_info)) ? -EFAULT : 0; - break; - - case WDIOC_GETSTATUS: - err = put_user(0, p); - break; - - case WDIOC_KEEPALIVE: - ramips_wdt_keepalive(); - err = 0; - break; - - case WDIOC_SETTIMEOUT: - err = get_user(t, p); - if (err) - break; - - err = ramips_wdt_set_timeout(t); - if (err) - break; - - /* fallthrough */ - case WDIOC_GETTIMEOUT: - err = put_user(ramips_wdt_timeout, p); - break; - - default: - err = -ENOTTY; - break; - } - - return err; -} - -static const struct file_operations ramips_wdt_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = ramips_wdt_write, - .unlocked_ioctl = ramips_wdt_ioctl, - .open = ramips_wdt_open, - .release = ramips_wdt_release, -}; - -static struct miscdevice ramips_wdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &ramips_wdt_fops, -}; - -static int ramips_wdt_probe(struct platform_device *pdev) -{ - struct resource *res; - int err; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "no memory resource found\n"); - return -EINVAL; - } - - ramips_wdt_base = ioremap(res->start, resource_size(res)); - if (!ramips_wdt_base) - return -ENOMEM; - - ramips_wdt_clk = clk_get(&pdev->dev, "wdt"); - if (IS_ERR(ramips_wdt_clk)) { - err = PTR_ERR(ramips_wdt_clk); - goto err_unmap; - } - - err = clk_enable(ramips_wdt_clk); - if (err) - goto err_clk_put; - - ramips_wdt_freq = clk_get_rate(ramips_wdt_clk) / RAMIPS_WDT_PRESCALE; - if (!ramips_wdt_freq) { - err = -EINVAL; - goto err_clk_disable; - } - - ramips_wdt_max_timeout = (0xfffful / ramips_wdt_freq); - if (ramips_wdt_timeout < 1 || - ramips_wdt_timeout > ramips_wdt_max_timeout) { - ramips_wdt_timeout = ramips_wdt_max_timeout; - dev_info(&pdev->dev, - "timeout value must be 0 < timeout <= %d, using %d\n", - ramips_wdt_max_timeout, ramips_wdt_timeout); - } - - err = misc_register(&ramips_wdt_miscdev); - if (err) { - dev_err(&pdev->dev, - "unable to register misc device, err=%d\n", err); - goto err_clk_disable; - } - - return 0; - -err_clk_disable: - clk_disable(ramips_wdt_clk); -err_clk_put: - clk_put(ramips_wdt_clk); -err_unmap: - iounmap(ramips_wdt_base); - return err; -} - -static int ramips_wdt_remove(struct platform_device *pdev) -{ - misc_deregister(&ramips_wdt_miscdev); - clk_disable(ramips_wdt_clk); - clk_put(ramips_wdt_clk); - iounmap(ramips_wdt_base); - return 0; -} - -static void ramips_wdt_shutdown(struct platform_device *pdev) -{ - ramips_wdt_disable(); -} - -static struct platform_driver ramips_wdt_driver = { - .remove = ramips_wdt_remove, - .shutdown = ramips_wdt_shutdown, - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - }, -}; - -static int __init ramips_wdt_init(void) -{ - return platform_driver_probe(&ramips_wdt_driver, ramips_wdt_probe); -} -module_init(ramips_wdt_init); - -static void __exit ramips_wdt_exit(void) -{ - platform_driver_unregister(&ramips_wdt_driver); -} -module_exit(ramips_wdt_exit); - -MODULE_DESCRIPTION("Ralink RT288X/RT305X hardware watchdog driver"); -MODULE_AUTHOR("Gabor Juhos