Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Berkshire PCI-PC Watchdog Card Driver |
| 3 | * |
Wim Van Sebroeck | 39e3a05 | 2007-01-07 21:49:11 +0100 | [diff] [blame] | 4 | * (c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Based on source code of the following authors: |
| 7 | * Ken Hollis <kenji@bitgate.com>, |
| 8 | * Lindsay Harris <lindsay@bluegum.com>, |
Alan Cox | 29fa058 | 2008-10-27 15:17:56 +0000 | [diff] [blame] | 9 | * Alan Cox <alan@lxorguk.ukuu.org.uk>, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * Matt Domsch <Matt_Domsch@dell.com>, |
| 11 | * Rob Radez <rob@osinvestor.com> |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or |
| 14 | * modify it under the terms of the GNU General Public License |
| 15 | * as published by the Free Software Foundation; either version |
| 16 | * 2 of the License, or (at your option) any later version. |
| 17 | * |
| 18 | * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor |
| 19 | * provide warranty for any of this software. This material is |
| 20 | * provided "AS-IS" and at no charge. |
| 21 | */ |
| 22 | |
| 23 | /* |
Wim Van Sebroeck | 58b519f | 2006-05-21 12:48:44 +0200 | [diff] [blame] | 24 | * A bells and whistles driver is available from: |
Wim Van Sebroeck | b3faed6 | 2005-10-22 16:27:19 +0200 | [diff] [blame] | 25 | * http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/ |
| 26 | * |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 27 | * More info available at |
| 28 | * http://www.berkprod.com/ or http://www.pcwatchdog.com/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | */ |
| 30 | |
| 31 | /* |
| 32 | * Includes, defines, variables, module parameters, ... |
| 33 | */ |
| 34 | |
Wim Van Sebroeck | c315b7e8 | 2005-09-12 00:21:19 +0200 | [diff] [blame] | 35 | #include <linux/module.h> /* For module specific items */ |
| 36 | #include <linux/moduleparam.h> /* For new moduleparam's */ |
| 37 | #include <linux/types.h> /* For standard types (like size_t) */ |
| 38 | #include <linux/errno.h> /* For the -ENODEV/... values */ |
| 39 | #include <linux/kernel.h> /* For printk/panic/... */ |
| 40 | #include <linux/delay.h> /* For mdelay function */ |
| 41 | #include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ |
| 42 | #include <linux/watchdog.h> /* For the watchdog specific items */ |
| 43 | #include <linux/notifier.h> /* For notifier support */ |
| 44 | #include <linux/reboot.h> /* For reboot_notifier stuff */ |
| 45 | #include <linux/init.h> /* For __init/__exit/... */ |
| 46 | #include <linux/fs.h> /* For file operations */ |
| 47 | #include <linux/pci.h> /* For pci functions */ |
| 48 | #include <linux/ioport.h> /* For io-port access */ |
| 49 | #include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */ |
Wim Van Sebroeck | 089ab07 | 2008-07-15 11:46:11 +0000 | [diff] [blame] | 50 | #include <linux/uaccess.h> /* For copy_to_user/put_user/... */ |
| 51 | #include <linux/io.h> /* For inb/outb/... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | /* Module and version information */ |
Wim Van Sebroeck | 39e3a05 | 2007-01-07 21:49:11 +0100 | [diff] [blame] | 54 | #define WATCHDOG_VERSION "1.03" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog" |
| 56 | #define WATCHDOG_NAME "pcwd_pci" |
| 57 | #define PFX WATCHDOG_NAME ": " |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 58 | #define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION "\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /* Stuff for the PCI ID's */ |
| 61 | #ifndef PCI_VENDOR_ID_QUICKLOGIC |
| 62 | #define PCI_VENDOR_ID_QUICKLOGIC 0x11e3 |
| 63 | #endif |
| 64 | |
| 65 | #ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD |
| 66 | #define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030 |
| 67 | #endif |
| 68 | |
| 69 | /* |
| 70 | * These are the defines that describe the control status bits for the |
| 71 | * PCI-PC Watchdog card. |
| 72 | */ |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 73 | /* Port 1 : Control Status #1 */ |
| 74 | #define WD_PCI_WTRP 0x01 /* Watchdog Trip status */ |
| 75 | #define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */ |
| 76 | #define WD_PCI_TTRP 0x04 /* Temperature Trip status */ |
| 77 | #define WD_PCI_RL2A 0x08 /* Relay 2 Active */ |
| 78 | #define WD_PCI_RL1A 0x10 /* Relay 1 Active */ |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 79 | #define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip / |
| 80 | reset */ |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 81 | #define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */ |
| 82 | /* Port 2 : Control Status #2 */ |
| 83 | #define WD_PCI_WDIS 0x10 /* Watchdog Disable */ |
| 84 | #define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */ |
| 85 | #define WD_PCI_WRSP 0x40 /* Watchdog wrote response */ |
| 86 | #define WD_PCI_PCMD 0x80 /* PC has sent command */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* according to documentation max. time to process a command for the pci |
| 89 | * watchdog card is 100 ms, so we give it 150 ms to do it's job */ |
| 90 | #define PCI_COMMAND_TIMEOUT 150 |
| 91 | |
| 92 | /* Watchdog's internal commands */ |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 93 | #define CMD_GET_STATUS 0x04 |
| 94 | #define CMD_GET_FIRMWARE_VERSION 0x08 |
| 95 | #define CMD_READ_WATCHDOG_TIMEOUT 0x18 |
| 96 | #define CMD_WRITE_WATCHDOG_TIMEOUT 0x19 |
| 97 | #define CMD_GET_CLEAR_RESET_COUNT 0x84 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
Wim Van Sebroeck | 39e3a05 | 2007-01-07 21:49:11 +0100 | [diff] [blame] | 99 | /* Watchdog's Dip Switch heartbeat values */ |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 100 | static const int heartbeat_tbl[] = { |
Wim Van Sebroeck | 39e3a05 | 2007-01-07 21:49:11 +0100 | [diff] [blame] | 101 | 5, /* OFF-OFF-OFF = 5 Sec */ |
| 102 | 10, /* OFF-OFF-ON = 10 Sec */ |
| 103 | 30, /* OFF-ON-OFF = 30 Sec */ |
| 104 | 60, /* OFF-ON-ON = 1 Min */ |
| 105 | 300, /* ON-OFF-OFF = 5 Min */ |
| 106 | 600, /* ON-OFF-ON = 10 Min */ |
| 107 | 1800, /* ON-ON-OFF = 30 Min */ |
| 108 | 3600, /* ON-ON-ON = 1 hour */ |
| 109 | }; |
| 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | /* We can only use 1 card due to the /dev/watchdog restriction */ |
| 112 | static int cards_found; |
| 113 | |
| 114 | /* internal variables */ |
| 115 | static int temp_panic; |
| 116 | static unsigned long is_active; |
| 117 | static char expect_release; |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 118 | /* this is private data for each PCI-PC watchdog card */ |
| 119 | static struct { |
| 120 | /* Wether or not the card has a temperature device */ |
| 121 | int supports_temp; |
| 122 | /* The card's boot status */ |
| 123 | int boot_status; |
| 124 | /* The cards I/O address */ |
| 125 | unsigned long io_addr; |
| 126 | /* the lock for io operations */ |
| 127 | spinlock_t io_lock; |
| 128 | /* the PCI-device */ |
| 129 | struct pci_dev *pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | } pcipcwd_private; |
| 131 | |
| 132 | /* module parameters */ |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 133 | #define QUIET 0 /* Default */ |
| 134 | #define VERBOSE 1 /* Verbose */ |
| 135 | #define DEBUG 2 /* print fancy stuff too */ |
| 136 | static int debug = QUIET; |
| 137 | module_param(debug, int, 0); |
| 138 | MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)"); |
| 139 | |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 140 | #define WATCHDOG_HEARTBEAT 0 /* default heartbeat = |
| 141 | delay-time from dip-switches */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | static int heartbeat = WATCHDOG_HEARTBEAT; |
| 143 | module_param(heartbeat, int, 0); |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 144 | MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. " |
| 145 | "(0<heartbeat<65536 or 0=delay-time from dip-switches, default=" |
| 146 | __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Andrey Panin | 4bfdf37 | 2005-07-27 11:43:58 -0700 | [diff] [blame] | 148 | static int nowayout = WATCHDOG_NOWAYOUT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | module_param(nowayout, int, 0); |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 150 | MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" |
| 151 | __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
| 153 | /* |
| 154 | * Internal functions |
| 155 | */ |
| 156 | |
| 157 | static int send_command(int cmd, int *msb, int *lsb) |
| 158 | { |
| 159 | int got_response, count; |
| 160 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 161 | if (debug >= DEBUG) |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 162 | printk(KERN_DEBUG PFX "sending following data " |
| 163 | "cmd=0x%02x msb=0x%02x lsb=0x%02x\n", cmd, *msb, *lsb); |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | spin_lock(&pcipcwd_private.io_lock); |
| 166 | /* If a command requires data it should be written first. |
| 167 | * Data for commands with 8 bits of data should be written to port 4. |
| 168 | * Commands with 16 bits of data, should be written as LSB to port 4 |
| 169 | * and MSB to port 5. |
| 170 | * After the required data has been written then write the command to |
| 171 | * port 6. */ |
| 172 | outb_p(*lsb, pcipcwd_private.io_addr + 4); |
| 173 | outb_p(*msb, pcipcwd_private.io_addr + 5); |
| 174 | outb_p(cmd, pcipcwd_private.io_addr + 6); |
| 175 | |
| 176 | /* wait till the pci card processed the command, signaled by |
| 177 | * the WRSP bit in port 2 and give it a max. timeout of |
| 178 | * PCI_COMMAND_TIMEOUT to process */ |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 179 | got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 180 | for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); |
| 181 | count++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | mdelay(1); |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 183 | got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 186 | if (debug >= DEBUG) { |
| 187 | if (got_response) { |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 188 | printk(KERN_DEBUG PFX |
| 189 | "time to process command was: %d ms\n", |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 190 | count); |
| 191 | } else { |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 192 | printk(KERN_DEBUG PFX |
| 193 | "card did not respond on command!\n"); |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 194 | } |
| 195 | } |
| 196 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | if (got_response) { |
| 198 | /* read back response */ |
| 199 | *lsb = inb_p(pcipcwd_private.io_addr + 4); |
| 200 | *msb = inb_p(pcipcwd_private.io_addr + 5); |
| 201 | |
| 202 | /* clear WRSP bit */ |
| 203 | inb_p(pcipcwd_private.io_addr + 6); |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 204 | |
| 205 | if (debug >= DEBUG) |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 206 | printk(KERN_DEBUG PFX "received following data for " |
| 207 | "cmd=0x%02x: msb=0x%02x lsb=0x%02x\n", |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 208 | cmd, *msb, *lsb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | spin_unlock(&pcipcwd_private.io_lock); |
| 212 | |
| 213 | return got_response; |
| 214 | } |
| 215 | |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 216 | static inline void pcipcwd_check_temperature_support(void) |
| 217 | { |
| 218 | if (inb_p(pcipcwd_private.io_addr) != 0xF0) |
| 219 | pcipcwd_private.supports_temp = 1; |
| 220 | } |
| 221 | |
| 222 | static int pcipcwd_get_option_switches(void) |
| 223 | { |
| 224 | int option_switches; |
| 225 | |
| 226 | option_switches = inb_p(pcipcwd_private.io_addr + 3); |
| 227 | return option_switches; |
| 228 | } |
| 229 | |
| 230 | static void pcipcwd_show_card_info(void) |
| 231 | { |
| 232 | int got_fw_rev, fw_rev_major, fw_rev_minor; |
| 233 | char fw_ver_str[20]; /* The cards firmware version */ |
| 234 | int option_switches; |
| 235 | |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 236 | got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, |
| 237 | &fw_rev_minor); |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 238 | if (got_fw_rev) |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 239 | sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor); |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 240 | else |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 241 | sprintf(fw_ver_str, "<card no answer>"); |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 242 | |
| 243 | /* Get switch settings */ |
| 244 | option_switches = pcipcwd_get_option_switches(); |
| 245 | |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 246 | printk(KERN_INFO PFX "Found card at port " |
| 247 | "0x%04x (Firmware: %s) %s temp option\n", |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 248 | (int) pcipcwd_private.io_addr, fw_ver_str, |
| 249 | (pcipcwd_private.supports_temp ? "with" : "without")); |
| 250 | |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 251 | printk(KERN_INFO PFX "Option switches (0x%02x): " |
| 252 | "Temperature Reset Enable=%s, Power On Delay=%s\n", |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 253 | option_switches, |
| 254 | ((option_switches & 0x10) ? "ON" : "OFF"), |
| 255 | ((option_switches & 0x08) ? "ON" : "OFF")); |
| 256 | |
| 257 | if (pcipcwd_private.boot_status & WDIOF_CARDRESET) |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 258 | printk(KERN_INFO PFX |
| 259 | "Previous reset was caused by the Watchdog card\n"); |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 260 | |
| 261 | if (pcipcwd_private.boot_status & WDIOF_OVERHEAT) |
| 262 | printk(KERN_INFO PFX "Card sensed a CPU Overheat\n"); |
| 263 | |
| 264 | if (pcipcwd_private.boot_status == 0) |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 265 | printk(KERN_INFO PFX |
| 266 | "No previous trip detected - Cold boot or reset\n"); |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 267 | } |
| 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | static int pcipcwd_start(void) |
| 270 | { |
| 271 | int stat_reg; |
| 272 | |
| 273 | spin_lock(&pcipcwd_private.io_lock); |
| 274 | outb_p(0x00, pcipcwd_private.io_addr + 3); |
| 275 | udelay(1000); |
| 276 | |
| 277 | stat_reg = inb_p(pcipcwd_private.io_addr + 2); |
| 278 | spin_unlock(&pcipcwd_private.io_lock); |
| 279 | |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 280 | if (stat_reg & WD_PCI_WDIS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | printk(KERN_ERR PFX "Card timer not enabled\n"); |
| 282 | return -1; |
| 283 | } |
| 284 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 285 | if (debug >= VERBOSE) |
| 286 | printk(KERN_DEBUG PFX "Watchdog started\n"); |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | static int pcipcwd_stop(void) |
| 292 | { |
| 293 | int stat_reg; |
| 294 | |
| 295 | spin_lock(&pcipcwd_private.io_lock); |
| 296 | outb_p(0xA5, pcipcwd_private.io_addr + 3); |
| 297 | udelay(1000); |
| 298 | |
| 299 | outb_p(0xA5, pcipcwd_private.io_addr + 3); |
| 300 | udelay(1000); |
| 301 | |
| 302 | stat_reg = inb_p(pcipcwd_private.io_addr + 2); |
| 303 | spin_unlock(&pcipcwd_private.io_lock); |
| 304 | |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 305 | if (!(stat_reg & WD_PCI_WDIS)) { |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 306 | printk(KERN_ERR PFX |
| 307 | "Card did not acknowledge disable attempt\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | return -1; |
| 309 | } |
| 310 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 311 | if (debug >= VERBOSE) |
| 312 | printk(KERN_DEBUG PFX "Watchdog stopped\n"); |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | static int pcipcwd_keepalive(void) |
| 318 | { |
| 319 | /* Re-trigger watchdog by writing to port 0 */ |
Wim Van Sebroeck | 045798b | 2007-01-07 21:57:03 +0100 | [diff] [blame] | 320 | spin_lock(&pcipcwd_private.io_lock); |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 321 | outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */ |
Wim Van Sebroeck | 045798b | 2007-01-07 21:57:03 +0100 | [diff] [blame] | 322 | spin_unlock(&pcipcwd_private.io_lock); |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 323 | |
| 324 | if (debug >= DEBUG) |
| 325 | printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); |
| 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | static int pcipcwd_set_heartbeat(int t) |
| 331 | { |
| 332 | int t_msb = t / 256; |
| 333 | int t_lsb = t % 256; |
| 334 | |
| 335 | if ((t < 0x0001) || (t > 0xFFFF)) |
| 336 | return -EINVAL; |
| 337 | |
| 338 | /* Write new heartbeat to watchdog */ |
| 339 | send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb); |
| 340 | |
| 341 | heartbeat = t; |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 342 | if (debug >= VERBOSE) |
| 343 | printk(KERN_DEBUG PFX "New heartbeat: %d\n", |
| 344 | heartbeat); |
| 345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static int pcipcwd_get_status(int *status) |
| 350 | { |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 351 | int control_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 353 | *status = 0; |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 354 | control_status = inb_p(pcipcwd_private.io_addr + 1); |
| 355 | if (control_status & WD_PCI_WTRP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | *status |= WDIOF_CARDRESET; |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 357 | if (control_status & WD_PCI_TTRP) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | *status |= WDIOF_OVERHEAT; |
| 359 | if (temp_panic) |
| 360 | panic(PFX "Temperature overheat trip!\n"); |
| 361 | } |
| 362 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 363 | if (debug >= DEBUG) |
| 364 | printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n", |
| 365 | control_status); |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | return 0; |
| 368 | } |
| 369 | |
| 370 | static int pcipcwd_clear_status(void) |
| 371 | { |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 372 | int control_status; |
| 373 | int msb; |
| 374 | int reset_counter; |
| 375 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 376 | if (debug >= VERBOSE) |
| 377 | printk(KERN_INFO PFX "clearing watchdog trip status & LED\n"); |
| 378 | |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 379 | control_status = inb_p(pcipcwd_private.io_addr + 1); |
| 380 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 381 | if (debug >= DEBUG) { |
| 382 | printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status); |
| 383 | printk(KERN_DEBUG PFX "sending: 0x%02x\n", |
| 384 | (control_status & WD_PCI_R2DS) | WD_PCI_WTRP); |
| 385 | } |
| 386 | |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 387 | /* clear trip status & LED and keep mode of relay 2 */ |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 388 | outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, |
| 389 | pcipcwd_private.io_addr + 1); |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 390 | |
| 391 | /* clear reset counter */ |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 392 | msb = 0; |
| 393 | reset_counter = 0xff; |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 394 | send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter); |
| 395 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 396 | if (debug >= DEBUG) { |
| 397 | printk(KERN_DEBUG PFX "reset count was: 0x%02x\n", |
| 398 | reset_counter); |
| 399 | } |
| 400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int pcipcwd_get_temperature(int *temperature) |
| 405 | { |
| 406 | *temperature = 0; |
| 407 | if (!pcipcwd_private.supports_temp) |
| 408 | return -ENODEV; |
| 409 | |
Wim Van Sebroeck | 045798b | 2007-01-07 21:57:03 +0100 | [diff] [blame] | 410 | spin_lock(&pcipcwd_private.io_lock); |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 411 | *temperature = inb_p(pcipcwd_private.io_addr); |
Wim Van Sebroeck | 045798b | 2007-01-07 21:57:03 +0100 | [diff] [blame] | 412 | spin_unlock(&pcipcwd_private.io_lock); |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | /* |
| 415 | * Convert celsius to fahrenheit, since this was |
| 416 | * the decided 'standard' for this return value. |
| 417 | */ |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 418 | *temperature = (*temperature * 9 / 5) + 32; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 420 | if (debug >= DEBUG) { |
| 421 | printk(KERN_DEBUG PFX "temperature is: %d F\n", |
| 422 | *temperature); |
| 423 | } |
| 424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | return 0; |
| 426 | } |
| 427 | |
Wim Van Sebroeck | 58b519f | 2006-05-21 12:48:44 +0200 | [diff] [blame] | 428 | static int pcipcwd_get_timeleft(int *time_left) |
| 429 | { |
| 430 | int msb; |
| 431 | int lsb; |
| 432 | |
| 433 | /* Read the time that's left before rebooting */ |
| 434 | /* Note: if the board is not yet armed then we will read 0xFFFF */ |
| 435 | send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb); |
| 436 | |
| 437 | *time_left = (msb << 8) + lsb; |
| 438 | |
| 439 | if (debug >= VERBOSE) |
| 440 | printk(KERN_DEBUG PFX "Time left before next reboot: %d\n", |
| 441 | *time_left); |
| 442 | |
| 443 | return 0; |
| 444 | } |
| 445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | /* |
| 447 | * /dev/watchdog handling |
| 448 | */ |
| 449 | |
| 450 | static ssize_t pcipcwd_write(struct file *file, const char __user *data, |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 451 | size_t len, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | { |
| 453 | /* See if we got the magic character 'V' and reload the timer */ |
| 454 | if (len) { |
| 455 | if (!nowayout) { |
| 456 | size_t i; |
| 457 | |
| 458 | /* note: just in case someone wrote the magic character |
| 459 | * five months ago... */ |
| 460 | expect_release = 0; |
| 461 | |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 462 | /* scan to see whether or not we got the |
| 463 | * magic character */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | for (i = 0; i != len; i++) { |
| 465 | char c; |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 466 | if (get_user(c, data + i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | return -EFAULT; |
| 468 | if (c == 'V') |
| 469 | expect_release = 42; |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | /* someone wrote to us, we should reload the timer */ |
| 474 | pcipcwd_keepalive(); |
| 475 | } |
| 476 | return len; |
| 477 | } |
| 478 | |
Alan Cox | c948852 | 2008-07-03 23:51:32 -0700 | [diff] [blame] | 479 | static long pcipcwd_ioctl(struct file *file, unsigned int cmd, |
| 480 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | { |
| 482 | void __user *argp = (void __user *)arg; |
| 483 | int __user *p = argp; |
| 484 | static struct watchdog_info ident = { |
| 485 | .options = WDIOF_OVERHEAT | |
| 486 | WDIOF_CARDRESET | |
| 487 | WDIOF_KEEPALIVEPING | |
| 488 | WDIOF_SETTIMEOUT | |
| 489 | WDIOF_MAGICCLOSE, |
| 490 | .firmware_version = 1, |
| 491 | .identity = WATCHDOG_DRIVER_NAME, |
| 492 | }; |
| 493 | |
| 494 | switch (cmd) { |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 495 | case WDIOC_GETSUPPORT: |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 496 | return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 498 | case WDIOC_GETSTATUS: |
| 499 | { |
| 500 | int status; |
| 501 | pcipcwd_get_status(&status); |
| 502 | return put_user(status, p); |
| 503 | } |
| 504 | |
| 505 | case WDIOC_GETBOOTSTATUS: |
| 506 | return put_user(pcipcwd_private.boot_status, p); |
| 507 | |
| 508 | case WDIOC_GETTEMP: |
| 509 | { |
| 510 | int temperature; |
| 511 | |
| 512 | if (pcipcwd_get_temperature(&temperature)) |
| 513 | return -EFAULT; |
| 514 | |
| 515 | return put_user(temperature, p); |
| 516 | } |
| 517 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 518 | case WDIOC_SETOPTIONS: |
| 519 | { |
| 520 | int new_options, retval = -EINVAL; |
| 521 | |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 522 | if (get_user(new_options, p)) |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 523 | return -EFAULT; |
| 524 | |
| 525 | if (new_options & WDIOS_DISABLECARD) { |
| 526 | if (pcipcwd_stop()) |
| 527 | return -EIO; |
| 528 | retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
| 530 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 531 | if (new_options & WDIOS_ENABLECARD) { |
| 532 | if (pcipcwd_start()) |
| 533 | return -EIO; |
| 534 | retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
| 536 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 537 | if (new_options & WDIOS_TEMPPANIC) { |
| 538 | temp_panic = 1; |
| 539 | retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | } |
| 541 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 542 | return retval; |
| 543 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Wim Van Sebroeck | 0c06090 | 2008-07-18 11:41:17 +0000 | [diff] [blame] | 545 | case WDIOC_KEEPALIVE: |
| 546 | pcipcwd_keepalive(); |
| 547 | return 0; |
| 548 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 549 | case WDIOC_SETTIMEOUT: |
| 550 | { |
| 551 | int new_heartbeat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 553 | if (get_user(new_heartbeat, p)) |
| 554 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 556 | if (pcipcwd_set_heartbeat(new_heartbeat)) |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 557 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 559 | pcipcwd_keepalive(); |
| 560 | /* Fall */ |
| 561 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 563 | case WDIOC_GETTIMEOUT: |
| 564 | return put_user(heartbeat, p); |
Wim Van Sebroeck | 58b519f | 2006-05-21 12:48:44 +0200 | [diff] [blame] | 565 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 566 | case WDIOC_GETTIMELEFT: |
| 567 | { |
| 568 | int time_left; |
Wim Van Sebroeck | 58b519f | 2006-05-21 12:48:44 +0200 | [diff] [blame] | 569 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 570 | if (pcipcwd_get_timeleft(&time_left)) |
| 571 | return -EFAULT; |
Wim Van Sebroeck | 58b519f | 2006-05-21 12:48:44 +0200 | [diff] [blame] | 572 | |
Wim Van Sebroeck | 5eb8249 | 2008-07-17 18:08:47 +0000 | [diff] [blame] | 573 | return put_user(time_left, p); |
| 574 | } |
| 575 | |
| 576 | default: |
| 577 | return -ENOTTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | } |
| 579 | } |
| 580 | |
| 581 | static int pcipcwd_open(struct inode *inode, struct file *file) |
| 582 | { |
| 583 | /* /dev/watchdog can only be opened once */ |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 584 | if (test_and_set_bit(0, &is_active)) { |
Wim Van Sebroeck | 195331d | 2005-09-29 16:22:30 +0200 | [diff] [blame] | 585 | if (debug >= VERBOSE) |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 586 | printk(KERN_ERR PFX |
| 587 | "Attempt to open already opened device.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | return -EBUSY; |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 589 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
| 591 | /* Activate */ |
| 592 | pcipcwd_start(); |
| 593 | pcipcwd_keepalive(); |
| 594 | return nonseekable_open(inode, file); |
| 595 | } |
| 596 | |
| 597 | static int pcipcwd_release(struct inode *inode, struct file *file) |
| 598 | { |
| 599 | /* |
| 600 | * Shut off the timer. |
| 601 | */ |
| 602 | if (expect_release == 42) { |
| 603 | pcipcwd_stop(); |
| 604 | } else { |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 605 | printk(KERN_CRIT PFX |
| 606 | "Unexpected close, not stopping watchdog!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | pcipcwd_keepalive(); |
| 608 | } |
| 609 | expect_release = 0; |
| 610 | clear_bit(0, &is_active); |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | /* |
| 615 | * /dev/temperature handling |
| 616 | */ |
| 617 | |
| 618 | static ssize_t pcipcwd_temp_read(struct file *file, char __user *data, |
| 619 | size_t len, loff_t *ppos) |
| 620 | { |
| 621 | int temperature; |
| 622 | |
| 623 | if (pcipcwd_get_temperature(&temperature)) |
| 624 | return -EFAULT; |
| 625 | |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 626 | if (copy_to_user(data, &temperature, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | return -EFAULT; |
| 628 | |
| 629 | return 1; |
| 630 | } |
| 631 | |
| 632 | static int pcipcwd_temp_open(struct inode *inode, struct file *file) |
| 633 | { |
| 634 | if (!pcipcwd_private.supports_temp) |
| 635 | return -ENODEV; |
| 636 | |
| 637 | return nonseekable_open(inode, file); |
| 638 | } |
| 639 | |
| 640 | static int pcipcwd_temp_release(struct inode *inode, struct file *file) |
| 641 | { |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * Notify system |
| 647 | */ |
| 648 | |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 649 | static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, |
| 650 | void *unused) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | { |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 652 | if (code == SYS_DOWN || code == SYS_HALT) |
| 653 | pcipcwd_stop(); /* Turn the WDT off */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | |
| 655 | return NOTIFY_DONE; |
| 656 | } |
| 657 | |
| 658 | /* |
| 659 | * Kernel Interfaces |
| 660 | */ |
| 661 | |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 662 | static const struct file_operations pcipcwd_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | .owner = THIS_MODULE, |
| 664 | .llseek = no_llseek, |
| 665 | .write = pcipcwd_write, |
Alan Cox | c948852 | 2008-07-03 23:51:32 -0700 | [diff] [blame] | 666 | .unlocked_ioctl = pcipcwd_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | .open = pcipcwd_open, |
| 668 | .release = pcipcwd_release, |
| 669 | }; |
| 670 | |
| 671 | static struct miscdevice pcipcwd_miscdev = { |
| 672 | .minor = WATCHDOG_MINOR, |
| 673 | .name = "watchdog", |
| 674 | .fops = &pcipcwd_fops, |
| 675 | }; |
| 676 | |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 677 | static const struct file_operations pcipcwd_temp_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | .owner = THIS_MODULE, |
| 679 | .llseek = no_llseek, |
| 680 | .read = pcipcwd_temp_read, |
| 681 | .open = pcipcwd_temp_open, |
| 682 | .release = pcipcwd_temp_release, |
| 683 | }; |
| 684 | |
| 685 | static struct miscdevice pcipcwd_temp_miscdev = { |
| 686 | .minor = TEMP_MINOR, |
| 687 | .name = "temperature", |
| 688 | .fops = &pcipcwd_temp_fops, |
| 689 | }; |
| 690 | |
| 691 | static struct notifier_block pcipcwd_notifier = { |
| 692 | .notifier_call = pcipcwd_notify_sys, |
| 693 | }; |
| 694 | |
| 695 | /* |
| 696 | * Init & exit routines |
| 697 | */ |
| 698 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | static int __devinit pcipcwd_card_init(struct pci_dev *pdev, |
| 700 | const struct pci_device_id *ent) |
| 701 | { |
| 702 | int ret = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | |
| 704 | cards_found++; |
| 705 | if (cards_found == 1) |
| 706 | printk(KERN_INFO PFX DRIVER_VERSION); |
| 707 | |
| 708 | if (cards_found > 1) { |
| 709 | printk(KERN_ERR PFX "This driver only supports 1 device\n"); |
| 710 | return -ENODEV; |
| 711 | } |
| 712 | |
| 713 | if (pci_enable_device(pdev)) { |
| 714 | printk(KERN_ERR PFX "Not possible to enable PCI Device\n"); |
| 715 | return -ENODEV; |
| 716 | } |
| 717 | |
| 718 | if (pci_resource_start(pdev, 0) == 0x0000) { |
| 719 | printk(KERN_ERR PFX "No I/O-Address for card detected\n"); |
| 720 | ret = -ENODEV; |
| 721 | goto err_out_disable_device; |
| 722 | } |
| 723 | |
| 724 | pcipcwd_private.pdev = pdev; |
| 725 | pcipcwd_private.io_addr = pci_resource_start(pdev, 0); |
| 726 | |
| 727 | if (pci_request_regions(pdev, WATCHDOG_NAME)) { |
| 728 | printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", |
| 729 | (int) pcipcwd_private.io_addr); |
| 730 | ret = -EIO; |
| 731 | goto err_out_disable_device; |
| 732 | } |
| 733 | |
| 734 | /* get the boot_status */ |
| 735 | pcipcwd_get_status(&pcipcwd_private.boot_status); |
| 736 | |
| 737 | /* clear the "card caused reboot" flag */ |
| 738 | pcipcwd_clear_status(); |
| 739 | |
| 740 | /* disable card */ |
| 741 | pcipcwd_stop(); |
| 742 | |
| 743 | /* Check whether or not the card supports the temperature device */ |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 744 | pcipcwd_check_temperature_support(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 746 | /* Show info about the card itself */ |
| 747 | pcipcwd_show_card_info(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
Wim Van Sebroeck | 39e3a05 | 2007-01-07 21:49:11 +0100 | [diff] [blame] | 749 | /* If heartbeat = 0 then we use the heartbeat from the dip-switches */ |
| 750 | if (heartbeat == 0) |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 751 | heartbeat = |
| 752 | heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)]; |
Wim Van Sebroeck | 39e3a05 | 2007-01-07 21:49:11 +0100 | [diff] [blame] | 753 | |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 754 | /* Check that the heartbeat value is within it's range ; |
| 755 | * if not reset to the default */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | if (pcipcwd_set_heartbeat(heartbeat)) { |
| 757 | pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT); |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 758 | printk(KERN_INFO PFX |
| 759 | "heartbeat value must be 0<heartbeat<65536, using %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | WATCHDOG_HEARTBEAT); |
| 761 | } |
| 762 | |
| 763 | ret = register_reboot_notifier(&pcipcwd_notifier); |
| 764 | if (ret != 0) { |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 765 | printk(KERN_ERR PFX |
| 766 | "cannot register reboot notifier (err=%d)\n", ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | goto err_out_release_region; |
| 768 | } |
| 769 | |
| 770 | if (pcipcwd_private.supports_temp) { |
| 771 | ret = misc_register(&pcipcwd_temp_miscdev); |
| 772 | if (ret != 0) { |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 773 | printk(KERN_ERR PFX "cannot register miscdev on " |
| 774 | "minor=%d (err=%d)\n", TEMP_MINOR, ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | goto err_out_unregister_reboot; |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | ret = misc_register(&pcipcwd_miscdev); |
| 780 | if (ret != 0) { |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 781 | printk(KERN_ERR PFX |
| 782 | "cannot register miscdev on minor=%d (err=%d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | WATCHDOG_MINOR, ret); |
| 784 | goto err_out_misc_deregister; |
| 785 | } |
| 786 | |
| 787 | printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", |
| 788 | heartbeat, nowayout); |
| 789 | |
| 790 | return 0; |
| 791 | |
| 792 | err_out_misc_deregister: |
| 793 | if (pcipcwd_private.supports_temp) |
| 794 | misc_deregister(&pcipcwd_temp_miscdev); |
| 795 | err_out_unregister_reboot: |
| 796 | unregister_reboot_notifier(&pcipcwd_notifier); |
| 797 | err_out_release_region: |
| 798 | pci_release_regions(pdev); |
| 799 | err_out_disable_device: |
| 800 | pci_disable_device(pdev); |
| 801 | return ret; |
| 802 | } |
| 803 | |
| 804 | static void __devexit pcipcwd_card_exit(struct pci_dev *pdev) |
| 805 | { |
| 806 | /* Stop the timer before we leave */ |
| 807 | if (!nowayout) |
| 808 | pcipcwd_stop(); |
| 809 | |
| 810 | /* Deregister */ |
| 811 | misc_deregister(&pcipcwd_miscdev); |
| 812 | if (pcipcwd_private.supports_temp) |
| 813 | misc_deregister(&pcipcwd_temp_miscdev); |
| 814 | unregister_reboot_notifier(&pcipcwd_notifier); |
| 815 | pci_release_regions(pdev); |
| 816 | pci_disable_device(pdev); |
| 817 | cards_found--; |
| 818 | } |
| 819 | |
| 820 | static struct pci_device_id pcipcwd_pci_tbl[] = { |
| 821 | { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD, |
| 822 | PCI_ANY_ID, PCI_ANY_ID, }, |
| 823 | { 0 }, /* End of list */ |
| 824 | }; |
| 825 | MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl); |
| 826 | |
| 827 | static struct pci_driver pcipcwd_driver = { |
| 828 | .name = WATCHDOG_NAME, |
| 829 | .id_table = pcipcwd_pci_tbl, |
| 830 | .probe = pcipcwd_card_init, |
| 831 | .remove = __devexit_p(pcipcwd_card_exit), |
| 832 | }; |
| 833 | |
| 834 | static int __init pcipcwd_init_module(void) |
| 835 | { |
Wim Van Sebroeck | a0800f6 | 2005-09-29 16:21:50 +0200 | [diff] [blame] | 836 | spin_lock_init(&pcipcwd_private.io_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
| 838 | return pci_register_driver(&pcipcwd_driver); |
| 839 | } |
| 840 | |
| 841 | static void __exit pcipcwd_cleanup_module(void) |
| 842 | { |
| 843 | pci_unregister_driver(&pcipcwd_driver); |
Wim Van Sebroeck | 045798b | 2007-01-07 21:57:03 +0100 | [diff] [blame] | 844 | |
| 845 | printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | module_init(pcipcwd_init_module); |
| 849 | module_exit(pcipcwd_cleanup_module); |
| 850 | |
| 851 | MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>"); |
| 852 | MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver"); |
| 853 | MODULE_LICENSE("GPL"); |
| 854 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); |
| 855 | MODULE_ALIAS_MISCDEV(TEMP_MINOR); |