diff options
Diffstat (limited to 'drivers/watchdog/pcf50606_wdt.c')
| -rw-r--r-- | drivers/watchdog/pcf50606_wdt.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/drivers/watchdog/pcf50606_wdt.c b/drivers/watchdog/pcf50606_wdt.c deleted file mode 100644 index ba8a472abf6..00000000000 --- a/drivers/watchdog/pcf50606_wdt.c +++ /dev/null @@ -1,213 +0,0 @@ -/* Philips PCF50606 Watchdog Timer Driver - * - * (C) 2006-2008 by Openmoko, Inc. - * Author: Balaji Rao <balajirrao@openmoko.org> - * All rights reserved. - * - * Broken down from monstrous PCF50606 driver mainly by - * Harald Welte, Matt Hsu, Andy Green and Werner Almesberger - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <linux/miscdevice.h> -#include <linux/watchdog.h> - -#include <linux/mfd/pcf50606/core.h> -#include <linux/mfd/pcf50606/wdt.h> - -static struct pcf50606 *pcf; -static unsigned long wdt_status; -#define WDT_IN_USE 0 -#define WDT_OK_TO_CLOSE 1 -#define WDT_REGION_INITED 2 -#define WDT_DEVICE_INITED 3 - -static int allow_close; -#define CLOSE_STATE_NOT 0x0000 -#define CLOSE_STATE_ALLOW 0x2342 - -static void pcf50606_wdt_start(void) -{ - pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_OOCC1, PCF50606_OOCC1_WDTRST, - PCF50606_OOCC1_WDTRST); -} - -static void pcf50606_wdt_stop(void) -{ - pcf50606_reg_clear_bits(pcf, PCF50606_REG_OOCS, PCF50606_OOCS_WDTEXP); -} - -static void pcf50606_wdt_keepalive(void) -{ - pcf50606_wdt_start(); -} - -static int pcf50606_wdt_open(struct inode *inode, struct file *file) -{ - if (test_and_set_bit(WDT_IN_USE, &wdt_status)) - return -EBUSY; - - pcf50606_wdt_start(); - - return nonseekable_open(inode, file); -} - -static int pcf50606_wdt_release(struct inode *inode, struct file *file) -{ - if (allow_close == CLOSE_STATE_ALLOW) - pcf50606_wdt_stop(); - else { - printk(KERN_CRIT "Unexpected close, not stopping watchdog!\n"); - pcf50606_wdt_keepalive(); - } - - allow_close = CLOSE_STATE_NOT; - clear_bit(WDT_IN_USE, &wdt_status); - - return 0; -} - -static ssize_t pcf50606_wdt_write(struct file *file, const char __user *data, - size_t len, loff_t *ppos) -{ - if (len) { - size_t i; - - for (i = 0; i != len; i++) { - char c; - if (get_user(c, data + i)) - return -EFAULT; - if (c == 'V') - allow_close = CLOSE_STATE_ALLOW; - } - pcf50606_wdt_keepalive(); - } - - return len; -} - -static struct watchdog_info pcf50606_wdt_ident = { - .options = WDIOF_MAGICCLOSE, - .firmware_version = 0, - .identity = "PCF50606 Watchdog", -}; - -static int pcf50606_wdt_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - void __user *argp = (void __user *)arg; - int __user *p = argp; - - switch (cmd) { - case WDIOC_GETSUPPORT: - return copy_to_user(argp, &pcf50606_wdt_ident, - sizeof(pcf50606_wdt_ident)) ? -EFAULT : 0; - break; - case WDIOC_GETSTATUS: - case WDIOC_GETBOOTSTATUS: - return put_user(0, p); - case WDIOC_KEEPALIVE: - pcf50606_wdt_keepalive(); - return 0; - case WDIOC_GETTIMEOUT: - return put_user(8, p); - default: - return -ENOIOCTLCMD; - } -} - -static struct file_operations pcf50606_wdt_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = &pcf50606_wdt_write, - .ioctl = &pcf50606_wdt_ioctl, - .open = &pcf50606_wdt_open, - .release = &pcf50606_wdt_release, -}; - -static struct miscdevice pcf50606_wdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &pcf50606_wdt_fops, -}; - -static void pcf50606_wdt_irq(struct pcf50606 *pcf, int irq, void *unused) -{ - pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_OOCC1, - PCF50606_OOCC1_WDTRST, - PCF50606_OOCC1_WDTRST); -} - -int __init pcf50606_wdt_probe(struct platform_device *pdev) -{ - struct pcf50606 *pcf; - int err; - - pcf = platform_get_drvdata(pdev); - - err = misc_register(&pcf50606_wdt_miscdev); - if (err) { - dev_err(&pdev->dev, "cannot register miscdev on " - "minor=%d (%d)\n", WATCHDOG_MINOR, err); - return err; - } - set_bit(WDT_DEVICE_INITED, &wdt_status); - - /* Set up IRQ handlers */ - pcf->irq_handler[PCF50606_IRQ_CHGWD10S].handler = pcf50606_wdt_irq; - - return 0; -} - -static int __devexit pcf50606_wdt_remove(struct platform_device *pdev) -{ - struct pcf50606 *pcf; - - pcf = platform_get_drvdata(pdev); - - misc_deregister(&pcf50606_wdt_miscdev); - - pcf->irq_handler[PCF50606_IRQ_CHGWD10S].handler = NULL; - - return 0; -} - -struct platform_driver pcf50606_wdt_driver = { - .driver = { - .name = "pcf50606-wdt", - }, - .probe = pcf50606_wdt_probe, - .remove = __devexit_p(pcf50606_wdt_remove), -}; - -static int __init pcf50606_wdt_init(void) -{ - return platform_driver_register(&pcf50606_wdt_driver); -} -module_init(pcf50606_wdt_init); - -static void __exit pcf50606_wdt_exit(void) -{ - platform_driver_unregister(&pcf50606_wdt_driver); -} -module_exit(pcf50606_wdt_exit); - -MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); -MODULE_DESCRIPTION("PCF50606 wdt driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:pcf50606-wdt"); - |