Commit 58a2c322 authored by Linus Torvalds's avatar Linus Torvalds

Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog

parents dcbd39a1 195331d7
......@@ -50,8 +50,8 @@
#include <asm/io.h> /* For inb/outb/... */
/* Module and version information */
#define WATCHDOG_VERSION "1.01"
#define WATCHDOG_DATE "02 Sep 2005"
#define WATCHDOG_VERSION "1.02"
#define WATCHDOG_DATE "03 Sep 2005"
#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
#define WATCHDOG_NAME "pcwd_pci"
#define PFX WATCHDOG_NAME ": "
......@@ -70,9 +70,19 @@
* These are the defines that describe the control status bits for the
* PCI-PC Watchdog card.
*/
/* Port 1 : Control Status #1 */
#define WD_PCI_WTRP 0x01 /* Watchdog Trip status */
#define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */
#define WD_PCI_TTRP 0x04 /* Temperature Trip status */
#define WD_PCI_RL2A 0x08 /* Relay 2 Active */
#define WD_PCI_RL1A 0x10 /* Relay 1 Active */
#define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip/reset */
#define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */
/* Port 2 : Control Status #2 */
#define WD_PCI_WDIS 0x10 /* Watchdog Disable */
#define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */
#define WD_PCI_WRSP 0x40 /* Watchdog wrote response */
#define WD_PCI_PCMD 0x80 /* PC has sent command */
/* according to documentation max. time to process a command for the pci
* watchdog card is 100 ms, so we give it 150 ms to do it's job */
......@@ -83,6 +93,7 @@
#define CMD_GET_FIRMWARE_VERSION 0x08
#define CMD_READ_WATCHDOG_TIMEOUT 0x18
#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19
#define CMD_GET_CLEAR_RESET_COUNT 0x84
/* We can only use 1 card due to the /dev/watchdog restriction */
static int cards_found;
......@@ -91,15 +102,22 @@ static int cards_found;
static int temp_panic;
static unsigned long is_active;
static char expect_release;
static struct {
static struct { /* this is private data for each PCI-PC watchdog card */
int supports_temp; /* Wether or not the card has a temperature device */
int boot_status; /* The card's boot status */
unsigned long io_addr; /* The cards I/O address */
spinlock_t io_lock;
struct pci_dev *pdev;
spinlock_t io_lock; /* the lock for io operations */
struct pci_dev *pdev; /* the PCI-device */
} pcipcwd_private;
/* module parameters */
#define QUIET 0 /* Default */
#define VERBOSE 1 /* Verbose */
#define DEBUG 2 /* print fancy stuff too */
static int debug = QUIET;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
#define WATCHDOG_HEARTBEAT 2 /* 2 sec default heartbeat */
static int heartbeat = WATCHDOG_HEARTBEAT;
module_param(heartbeat, int, 0);
......@@ -117,6 +135,10 @@ static int send_command(int cmd, int *msb, int *lsb)
{
int got_response, count;
if (debug >= DEBUG)
printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
cmd, *msb, *lsb);
spin_lock(&pcipcwd_private.io_lock);
/* If a command requires data it should be written first.
* Data for commands with 8 bits of data should be written to port 4.
......@@ -131,10 +153,19 @@ static int send_command(int cmd, int *msb, int *lsb)
/* wait till the pci card processed the command, signaled by
* the WRSP bit in port 2 and give it a max. timeout of
* PCI_COMMAND_TIMEOUT to process */
got_response = inb_p(pcipcwd_private.io_addr + 2) & 0x40;
got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) {
mdelay(1);
got_response = inb_p(pcipcwd_private.io_addr + 2) & 0x40;
got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
}
if (debug >= DEBUG) {
if (got_response) {
printk(KERN_DEBUG PFX "time to process command was: %d ms\n",
count);
} else {
printk(KERN_DEBUG PFX "card did not respond on command!\n");
}
}
if (got_response) {
......@@ -144,12 +175,66 @@ static int send_command(int cmd, int *msb, int *lsb)
/* clear WRSP bit */
inb_p(pcipcwd_private.io_addr + 6);
if (debug >= DEBUG)
printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
cmd, *msb, *lsb);
}
spin_unlock(&pcipcwd_private.io_lock);
return got_response;
}
static inline void pcipcwd_check_temperature_support(void)
{
if (inb_p(pcipcwd_private.io_addr) != 0xF0)
pcipcwd_private.supports_temp = 1;
}
static int pcipcwd_get_option_switches(void)
{
int option_switches;
option_switches = inb_p(pcipcwd_private.io_addr + 3);
return option_switches;
}
static void pcipcwd_show_card_info(void)
{
int got_fw_rev, fw_rev_major, fw_rev_minor;
char fw_ver_str[20]; /* The cards firmware version */
int option_switches;
got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
if (got_fw_rev) {
sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
} else {
sprintf(fw_ver_str, "<card no answer>");
}
/* Get switch settings */
option_switches = pcipcwd_get_option_switches();
printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
(int) pcipcwd_private.io_addr, fw_ver_str,
(pcipcwd_private.supports_temp ? "with" : "without"));
printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
option_switches,
((option_switches & 0x10) ? "ON" : "OFF"),
((option_switches & 0x08) ? "ON" : "OFF"));
if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
if (pcipcwd_private.boot_status == 0)
printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
}
static int pcipcwd_start(void)
{
int stat_reg;
......@@ -161,11 +246,14 @@ static int pcipcwd_start(void)
stat_reg = inb_p(pcipcwd_private.io_addr + 2);
spin_unlock(&pcipcwd_private.io_lock);
if (stat_reg & 0x10) {
if (stat_reg & WD_PCI_WDIS) {
printk(KERN_ERR PFX "Card timer not enabled\n");
return -1;
}
if (debug >= VERBOSE)
printk(KERN_DEBUG PFX "Watchdog started\n");
return 0;
}
......@@ -183,18 +271,25 @@ static int pcipcwd_stop(void)
stat_reg = inb_p(pcipcwd_private.io_addr + 2);
spin_unlock(&pcipcwd_private.io_lock);
if (!(stat_reg & 0x10)) {
if (!(stat_reg & WD_PCI_WDIS)) {
printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
return -1;
}
if (debug >= VERBOSE)
printk(KERN_DEBUG PFX "Watchdog stopped\n");
return 0;
}
static int pcipcwd_keepalive(void)
{
/* Re-trigger watchdog by writing to port 0 */
outb_p(0x42, pcipcwd_private.io_addr);
outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */
if (debug >= DEBUG)
printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
return 0;
}
......@@ -210,29 +305,64 @@ static int pcipcwd_set_heartbeat(int t)
send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
heartbeat = t;
if (debug >= VERBOSE)
printk(KERN_DEBUG PFX "New heartbeat: %d\n",
heartbeat);
return 0;
}
static int pcipcwd_get_status(int *status)
{
int new_status;
int control_status;
*status=0;
new_status = inb_p(pcipcwd_private.io_addr + 1);
if (new_status & WD_PCI_WTRP)
control_status = inb_p(pcipcwd_private.io_addr + 1);
if (control_status & WD_PCI_WTRP)
*status |= WDIOF_CARDRESET;
if (new_status & WD_PCI_TTRP) {
if (control_status & WD_PCI_TTRP) {
*status |= WDIOF_OVERHEAT;
if (temp_panic)
panic(PFX "Temperature overheat trip!\n");
}
if (debug >= DEBUG)
printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n",
control_status);
return 0;
}
static int pcipcwd_clear_status(void)
{
outb_p(0x01, pcipcwd_private.io_addr + 1);
int control_status;
int msb;
int reset_counter;
if (debug >= VERBOSE)
printk(KERN_INFO PFX "clearing watchdog trip status & LED\n");
control_status = inb_p(pcipcwd_private.io_addr + 1);
if (debug >= DEBUG) {
printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
printk(KERN_DEBUG PFX "sending: 0x%02x\n",
(control_status & WD_PCI_R2DS) | WD_PCI_WTRP);
}
/* clear trip status & LED and keep mode of relay 2 */
outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1);
/* clear reset counter */
msb=0;
reset_counter=0xff;
send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
if (debug >= DEBUG) {
printk(KERN_DEBUG PFX "reset count was: 0x%02x\n",
reset_counter);
}
return 0;
}
......@@ -242,11 +372,18 @@ static int pcipcwd_get_temperature(int *temperature)
if (!pcipcwd_private.supports_temp)
return -ENODEV;
*temperature = inb_p(pcipcwd_private.io_addr);
/*
* Convert celsius to fahrenheit, since this was
* the decided 'standard' for this return value.
*/
*temperature = ((inb_p(pcipcwd_private.io_addr)) * 9 / 5) + 32;
*temperature = (*temperature * 9 / 5) + 32;
if (debug >= DEBUG) {
printk(KERN_DEBUG PFX "temperature is: %d F\n",
*temperature);
}
return 0;
}
......@@ -381,8 +518,11 @@ static int pcipcwd_ioctl(struct inode *inode, struct file *file,
static int pcipcwd_open(struct inode *inode, struct file *file)
{
/* /dev/watchdog can only be opened once */
if (test_and_set_bit(0, &is_active))
if (test_and_set_bit(0, &is_active)) {
if (debug >= VERBOSE)
printk(KERN_ERR PFX "Attempt to open already opened device.\n");
return -EBUSY;
}
/* Activate */
pcipcwd_start();
......@@ -492,19 +632,10 @@ static struct notifier_block pcipcwd_notifier = {
* Init & exit routines
*/
static inline void check_temperature_support(void)
{
if (inb_p(pcipcwd_private.io_addr) != 0xF0)
pcipcwd_private.supports_temp = 1;
}
static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret = -EIO;
int got_fw_rev, fw_rev_major, fw_rev_minor;
char fw_ver_str[20];
char option_switches;
cards_found++;
if (cards_found == 1)
......@@ -546,36 +677,10 @@ static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
pcipcwd_stop();
/* Check whether or not the card supports the temperature device */
check_temperature_support();
pcipcwd_check_temperature_support();
/* Get the Firmware Version */
got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
if (got_fw_rev) {
sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
} else {
sprintf(fw_ver_str, "<card no answer>");
}
/* Get switch settings */
option_switches = inb_p(pcipcwd_private.io_addr + 3);
printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
(int) pcipcwd_private.io_addr, fw_ver_str,
(pcipcwd_private.supports_temp ? "with" : "without"));
printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
option_switches,
((option_switches & 0x10) ? "ON" : "OFF"),
((option_switches & 0x08) ? "ON" : "OFF"));
if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
if (pcipcwd_private.boot_status == 0)
printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
/* Show info about the card itself */
pcipcwd_show_card_info();
/* Check that the heartbeat value is within it's range ; if not reset to the default */
if (pcipcwd_set_heartbeat(heartbeat)) {
......@@ -656,7 +761,7 @@ static struct pci_driver pcipcwd_driver = {
static int __init pcipcwd_init_module(void)
{
spin_lock_init (&pcipcwd_private.io_lock);
spin_lock_init(&pcipcwd_private.io_lock);
return pci_register_driver(&pcipcwd_driver);
}
......
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