diff options
Diffstat (limited to 'drivers/char/watchdog/ibmasr.c')
| -rw-r--r-- | drivers/char/watchdog/ibmasr.c | 403 |
1 files changed, 0 insertions, 403 deletions
diff --git a/drivers/char/watchdog/ibmasr.c b/drivers/char/watchdog/ibmasr.c deleted file mode 100644 index 94155f6136c2..000000000000 --- a/drivers/char/watchdog/ibmasr.c +++ /dev/null @@ -1,403 +0,0 @@ -/* - * IBM Automatic Server Restart driver. - * - * Copyright (c) 2005 Andrey Panin <pazke@donpac.ru> - * - * Based on driver written by Pete Reynolds. - * Copyright (c) IBM Corporation, 1998-2004. - * - * This software may be used and distributed according to the terms - * of the GNU Public License, incorporated herein by reference. - */ - -#include <linux/fs.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/timer.h> -#include <linux/miscdevice.h> -#include <linux/watchdog.h> -#include <linux/dmi.h> - -#include <asm/io.h> -#include <asm/uaccess.h> - - -enum { - ASMTYPE_UNKNOWN, - ASMTYPE_TOPAZ, - ASMTYPE_JASPER, - ASMTYPE_PEARL, - ASMTYPE_JUNIPER, - ASMTYPE_SPRUCE, -}; - -#define PFX "ibmasr: " - -#define TOPAZ_ASR_REG_OFFSET 4 -#define TOPAZ_ASR_TOGGLE 0x40 -#define TOPAZ_ASR_DISABLE 0x80 - -/* PEARL ASR S/W REGISTER SUPERIO PORT ADDRESSES */ -#define PEARL_BASE 0xe04 -#define PEARL_WRITE 0xe06 -#define PEARL_READ 0xe07 - -#define PEARL_ASR_DISABLE_MASK 0x80 /* bit 7: disable = 1, enable = 0 */ -#define PEARL_ASR_TOGGLE_MASK 0x40 /* bit 6: 0, then 1, then 0 */ - -/* JASPER OFFSET FROM SIO BASE ADDR TO ASR S/W REGISTERS. */ -#define JASPER_ASR_REG_OFFSET 0x38 - -#define JASPER_ASR_DISABLE_MASK 0x01 /* bit 0: disable = 1, enable = 0 */ -#define JASPER_ASR_TOGGLE_MASK 0x02 /* bit 1: 0, then 1, then 0 */ - -#define JUNIPER_BASE_ADDRESS 0x54b /* Base address of Juniper ASR */ -#define JUNIPER_ASR_DISABLE_MASK 0x01 /* bit 0: disable = 1 enable = 0 */ -#define JUNIPER_ASR_TOGGLE_MASK 0x02 /* bit 1: 0, then 1, then 0 */ - -#define SPRUCE_BASE_ADDRESS 0x118e /* Base address of Spruce ASR */ -#define SPRUCE_ASR_DISABLE_MASK 0x01 /* bit 1: disable = 1 enable = 0 */ -#define SPRUCE_ASR_TOGGLE_MASK 0x02 /* bit 0: 0, then 1, then 0 */ - - -static int nowayout = WATCHDOG_NOWAYOUT; - -static unsigned long asr_is_open; -static char asr_expect_close; - -static unsigned int asr_type, asr_base, asr_length; -static unsigned int asr_read_addr, asr_write_addr; -static unsigned char asr_toggle_mask, asr_disable_mask; - -static void asr_toggle(void) -{ - unsigned char reg = inb(asr_read_addr); - - outb(reg & ~asr_toggle_mask, asr_write_addr); - reg = inb(asr_read_addr); - - outb(reg | asr_toggle_mask, asr_write_addr); - reg = inb(asr_read_addr); - - outb(reg & ~asr_toggle_mask, asr_write_addr); - reg = inb(asr_read_addr); -} - -static void asr_enable(void) -{ - unsigned char reg; - - if (asr_type == ASMTYPE_TOPAZ) { - /* asr_write_addr == asr_read_addr */ - reg = inb(asr_read_addr); - outb(reg & ~(TOPAZ_ASR_TOGGLE | TOPAZ_ASR_DISABLE), - asr_read_addr); - } else { - /* - * First make sure the hardware timer is reset by toggling - * ASR hardware timer line. - */ - asr_toggle(); - - reg = inb(asr_read_addr); - outb(reg & ~asr_disable_mask, asr_write_addr); - } - reg = inb(asr_read_addr); -} - -static void asr_disable(void) -{ - unsigned char reg = inb(asr_read_addr); - - if (asr_type == ASMTYPE_TOPAZ) - /* asr_write_addr == asr_read_addr */ - outb(reg | TOPAZ_ASR_TOGGLE | TOPAZ_ASR_DISABLE, - asr_read_addr); - else { - outb(reg | asr_toggle_mask, asr_write_addr); - reg = inb(asr_read_addr); - - outb(reg | asr_disable_mask, asr_write_addr); - } - reg = inb(asr_read_addr); -} - -static int __init asr_get_base_address(void) -{ - unsigned char low, high; - const char *type = ""; - - asr_length = 1; - - switch (asr_type) { - case ASMTYPE_TOPAZ: - /* SELECT SuperIO CHIP FOR QUERYING (WRITE 0x07 TO BOTH 0x2E and 0x2F) */ - outb(0x07, 0x2e); - outb(0x07, 0x2f); - - /* SELECT AND READ THE HIGH-NIBBLE OF THE GPIO BASE ADDRESS */ - outb(0x60, 0x2e); - high = inb(0x2f); - - /* SELECT AND READ THE LOW-NIBBLE OF THE GPIO BASE ADDRESS */ - outb(0x61, 0x2e); - low = inb(0x2f); - - asr_base = (high << 16) | low; - asr_read_addr = asr_write_addr = - asr_base + TOPAZ_ASR_REG_OFFSET; - asr_length = 5; - - break; - - case ASMTYPE_JASPER: - type = "Jaspers "; - - /* FIXME: need to use pci_config_lock here, but it's not exported */ - -/* spin_lock_irqsave(&pci_config_lock, flags);*/ - - /* Select the SuperIO chip in the PCI I/O port register */ - outl(0x8000f858, 0xcf8); - - /* - * Read the base address for the SuperIO chip. - * Only the lower 16 bits are valid, but the address is word - * aligned so the last bit must be masked off. - */ - asr_base = inl(0xcfc) & 0xfffe; - -/* spin_unlock_irqrestore(&pci_config_lock, flags);*/ - - asr_read_addr = asr_write_addr = - asr_base + JASPER_ASR_REG_OFFSET; - asr_toggle_mask = JASPER_ASR_TOGGLE_MASK; - asr_disable_mask = JASPER_ASR_DISABLE_MASK; - asr_length = JASPER_ASR_REG_OFFSET + 1; - - break; - - case ASMTYPE_PEARL: - type = "Pearls "; - asr_base = PEARL_BASE; - asr_read_addr = PEARL_READ; - asr_write_addr = PEARL_WRITE; - asr_toggle_mask = PEARL_ASR_TOGGLE_MASK; - asr_disable_mask = PEARL_ASR_DISABLE_MASK; - asr_length = 4; - break; - - case ASMTYPE_JUNIPER: - type = "Junipers "; - asr_base = JUNIPER_BASE_ADDRESS; - asr_read_addr = asr_write_addr = asr_base; - asr_toggle_mask = JUNIPER_ASR_TOGGLE_MASK; - asr_disable_mask = JUNIPER_ASR_DISABLE_MASK; - break; - - case ASMTYPE_SPRUCE: - type = "Spruce's "; - asr_base = SPRUCE_BASE_ADDRESS; - asr_read_addr = asr_write_addr = asr_base; - asr_toggle_mask = SPRUCE_ASR_TOGGLE_MASK; - asr_disable_mask = SPRUCE_ASR_DISABLE_MASK; - break; - } - - if (!request_region(asr_base, asr_length, "ibmasr")) { - printk(KERN_ERR PFX "address %#x already in use\n", - asr_base); - return -EBUSY; - } - - printk(KERN_INFO PFX "found %sASR @ addr %#x\n", type, asr_base); - - return 0; -} - - -static ssize_t asr_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) -{ - if (count) { - if (!nowayout) { - size_t i; - - /* In case it was set long ago */ - asr_expect_close = 0; - - for (i = 0; i != count; i++) { - char c; - if (get_user(c, buf + i)) - return -EFAULT; - if (c == 'V') - asr_expect_close = 42; - } - } - asr_toggle(); - } - return count; -} - -static int asr_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - static const struct watchdog_info ident = { - .options = WDIOF_KEEPALIVEPING | - WDIOF_MAGICCLOSE, - .identity = "IBM ASR" - }; - void __user *argp = (void __user *)arg; - int __user *p = argp; - int heartbeat; - - switch (cmd) { - case WDIOC_GETSUPPORT: - return copy_to_user(argp, &ident, sizeof(ident)) ? - -EFAULT : 0; - - case WDIOC_GETSTATUS: - case WDIOC_GETBOOTSTATUS: - return put_user(0, p); - - case WDIOC_KEEPALIVE: - asr_toggle(); - return 0; - - /* - * The hardware has a fixed timeout value, so no WDIOC_SETTIMEOUT - * and WDIOC_GETTIMEOUT always returns 256. - */ - case WDIOC_GETTIMEOUT: - heartbeat = 256; - return put_user(heartbeat, p); - - case WDIOC_SETOPTIONS: { - int new_options, retval = -EINVAL; - - if (get_user(new_options, p)) - return -EFAULT; - - if (new_options & WDIOS_DISABLECARD) { - asr_disable(); - retval = 0; - } - - if (new_options & WDIOS_ENABLECARD) { - asr_enable(); - asr_toggle(); - retval = 0; - } - - return retval; - } - } - - return -ENOTTY; -} - -static int asr_open(struct inode *inode, struct file *file) -{ - if(test_and_set_bit(0, &asr_is_open)) - return -EBUSY; - - asr_toggle(); - asr_enable(); - - return nonseekable_open(inode, file); -} - -static int asr_release(struct inode *inode, struct file *file) -{ - if (asr_expect_close == 42) - asr_disable(); - else { - printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n"); - asr_toggle(); - } - clear_bit(0, &asr_is_open); - asr_expect_close = 0; - return 0; -} - -static const struct file_operations asr_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = asr_write, - .ioctl = asr_ioctl, - .open = asr_open, - .release = asr_release, -}; - -static struct miscdevice asr_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &asr_fops, -}; - - -struct ibmasr_id { - const char *desc; - int type; -}; - -static struct ibmasr_id __initdata ibmasr_id_table[] = { - { "IBM Automatic Server Restart - eserver xSeries 220", ASMTYPE_TOPAZ }, - { "IBM Automatic Server Restart - Machine Type 8673", ASMTYPE_PEARL }, - { "IBM Automatic Server Restart - Machine Type 8480", ASMTYPE_JASPER }, - { "IBM Automatic Server Restart - Machine Type 8482", ASMTYPE_JUNIPER }, - { "IBM Automatic Server Restart - Machine Type 8648", ASMTYPE_SPRUCE }, - { NULL } -}; - -static int __init ibmasr_init(void) -{ - struct ibmasr_id *id; - int rc; - - for (id = ibmasr_id_table; id->desc; id++) { - if (dmi_find_device(DMI_DEV_TYPE_OTHER, id->desc, NULL)) { - asr_type = id->type; - break; - } - } - - if (!asr_type) - return -ENODEV; - - rc = asr_get_base_address(); - if (rc) - return rc; - - rc = misc_register(&asr_miscdev); - if (rc < 0) { - release_region(asr_base, asr_length); - printk(KERN_ERR PFX "failed to register misc device\n"); - return rc; - } - - return 0; -} - -static void __exit ibmasr_exit(void) -{ - if (!nowayout) - asr_disable(); - - misc_deregister(&asr_miscdev); - - release_region(asr_base, asr_length); -} - -module_init(ibmasr_init); -module_exit(ibmasr_exit); - -module_param(nowayout, int, 0); -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); - -MODULE_DESCRIPTION("IBM Automatic Server Restart driver"); -MODULE_AUTHOR("Andrey Panin"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); 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