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[WATCHDOG] pcwd_pci.c control status + boot-code clean-up
* Clean-up control status code (use control status defines + change pcipcwd_clear_status) * Clean-up boot-code (move card info to pcipcwd_show_card_info() ) Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Wim Van Sebroeck
parent
664cceb009
commit
a0800f6da7
1 changed files with 108 additions and 67 deletions
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@ -50,8 +50,8 @@
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#include <asm/io.h> /* For inb/outb/... */
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/* Module and version information */
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#define WATCHDOG_VERSION "1.01"
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#define WATCHDOG_DATE "02 Sep 2005"
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#define WATCHDOG_VERSION "1.02"
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#define WATCHDOG_DATE "03 Sep 2005"
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#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
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#define WATCHDOG_NAME "pcwd_pci"
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#define PFX WATCHDOG_NAME ": "
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@ -70,19 +70,30 @@
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* These are the defines that describe the control status bits for the
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* PCI-PC Watchdog card.
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*/
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#define WD_PCI_WTRP 0x01 /* Watchdog Trip status */
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#define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */
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#define WD_PCI_TTRP 0x04 /* Temperature Trip status */
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/* Port 1 : Control Status #1 */
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#define WD_PCI_WTRP 0x01 /* Watchdog Trip status */
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#define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */
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#define WD_PCI_TTRP 0x04 /* Temperature Trip status */
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#define WD_PCI_RL2A 0x08 /* Relay 2 Active */
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#define WD_PCI_RL1A 0x10 /* Relay 1 Active */
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#define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip/reset */
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#define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */
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/* Port 2 : Control Status #2 */
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#define WD_PCI_WDIS 0x10 /* Watchdog Disable */
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#define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */
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#define WD_PCI_WRSP 0x40 /* Watchdog wrote response */
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#define WD_PCI_PCMD 0x80 /* PC has sent command */
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/* according to documentation max. time to process a command for the pci
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* watchdog card is 100 ms, so we give it 150 ms to do it's job */
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#define PCI_COMMAND_TIMEOUT 150
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/* Watchdog's internal commands */
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#define CMD_GET_STATUS 0x04
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#define CMD_GET_FIRMWARE_VERSION 0x08
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#define CMD_READ_WATCHDOG_TIMEOUT 0x18
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#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19
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#define CMD_GET_STATUS 0x04
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#define CMD_GET_FIRMWARE_VERSION 0x08
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#define CMD_READ_WATCHDOG_TIMEOUT 0x18
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#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19
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#define CMD_GET_CLEAR_RESET_COUNT 0x84
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/* We can only use 1 card due to the /dev/watchdog restriction */
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static int cards_found;
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@ -91,12 +102,12 @@ static int cards_found;
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static int temp_panic;
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static unsigned long is_active;
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static char expect_release;
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static struct {
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int supports_temp; /* Wether or not the card has a temperature device */
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int boot_status; /* The card's boot status */
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unsigned long io_addr; /* The cards I/O address */
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spinlock_t io_lock;
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struct pci_dev *pdev;
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static struct { /* this is private data for each PCI-PC watchdog card */
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int supports_temp; /* Wether or not the card has a temperature device */
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int boot_status; /* The card's boot status */
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unsigned long io_addr; /* The cards I/O address */
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spinlock_t io_lock; /* the lock for io operations */
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struct pci_dev *pdev; /* the PCI-device */
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} pcipcwd_private;
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/* module parameters */
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@ -131,10 +142,10 @@ static int send_command(int cmd, int *msb, int *lsb)
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/* wait till the pci card processed the command, signaled by
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* the WRSP bit in port 2 and give it a max. timeout of
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* PCI_COMMAND_TIMEOUT to process */
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got_response = inb_p(pcipcwd_private.io_addr + 2) & 0x40;
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got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
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for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) {
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mdelay(1);
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got_response = inb_p(pcipcwd_private.io_addr + 2) & 0x40;
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got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
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}
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if (got_response) {
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@ -150,6 +161,55 @@ static int send_command(int cmd, int *msb, int *lsb)
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return got_response;
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}
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static inline void pcipcwd_check_temperature_support(void)
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{
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if (inb_p(pcipcwd_private.io_addr) != 0xF0)
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pcipcwd_private.supports_temp = 1;
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}
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static int pcipcwd_get_option_switches(void)
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{
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int option_switches;
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option_switches = inb_p(pcipcwd_private.io_addr + 3);
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return option_switches;
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}
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static void pcipcwd_show_card_info(void)
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{
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int got_fw_rev, fw_rev_major, fw_rev_minor;
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char fw_ver_str[20]; /* The cards firmware version */
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int option_switches;
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got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
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if (got_fw_rev) {
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sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
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} else {
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sprintf(fw_ver_str, "<card no answer>");
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}
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/* Get switch settings */
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option_switches = pcipcwd_get_option_switches();
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printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
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(int) pcipcwd_private.io_addr, fw_ver_str,
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(pcipcwd_private.supports_temp ? "with" : "without"));
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printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
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option_switches,
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((option_switches & 0x10) ? "ON" : "OFF"),
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((option_switches & 0x08) ? "ON" : "OFF"));
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if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
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printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
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if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
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printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
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if (pcipcwd_private.boot_status == 0)
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printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
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}
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static int pcipcwd_start(void)
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{
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int stat_reg;
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@ -161,7 +221,7 @@ static int pcipcwd_start(void)
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stat_reg = inb_p(pcipcwd_private.io_addr + 2);
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spin_unlock(&pcipcwd_private.io_lock);
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if (stat_reg & 0x10) {
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if (stat_reg & WD_PCI_WDIS) {
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printk(KERN_ERR PFX "Card timer not enabled\n");
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return -1;
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}
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@ -183,7 +243,7 @@ static int pcipcwd_stop(void)
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stat_reg = inb_p(pcipcwd_private.io_addr + 2);
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spin_unlock(&pcipcwd_private.io_lock);
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if (!(stat_reg & 0x10)) {
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if (!(stat_reg & WD_PCI_WDIS)) {
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printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
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return -1;
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}
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@ -194,7 +254,7 @@ static int pcipcwd_stop(void)
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static int pcipcwd_keepalive(void)
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{
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/* Re-trigger watchdog by writing to port 0 */
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outb_p(0x42, pcipcwd_private.io_addr);
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outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */
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return 0;
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}
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@ -215,13 +275,13 @@ static int pcipcwd_set_heartbeat(int t)
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static int pcipcwd_get_status(int *status)
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{
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int new_status;
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int control_status;
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*status=0;
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new_status = inb_p(pcipcwd_private.io_addr + 1);
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if (new_status & WD_PCI_WTRP)
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control_status = inb_p(pcipcwd_private.io_addr + 1);
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if (control_status & WD_PCI_WTRP)
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*status |= WDIOF_CARDRESET;
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if (new_status & WD_PCI_TTRP) {
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if (control_status & WD_PCI_TTRP) {
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*status |= WDIOF_OVERHEAT;
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if (temp_panic)
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panic(PFX "Temperature overheat trip!\n");
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@ -232,7 +292,20 @@ static int pcipcwd_get_status(int *status)
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static int pcipcwd_clear_status(void)
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{
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outb_p(0x01, pcipcwd_private.io_addr + 1);
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int control_status;
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int msb;
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int reset_counter;
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control_status = inb_p(pcipcwd_private.io_addr + 1);
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/* clear trip status & LED and keep mode of relay 2 */
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outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1);
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/* clear reset counter */
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msb=0;
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reset_counter=0xff;
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send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
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return 0;
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}
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@ -242,11 +315,13 @@ static int pcipcwd_get_temperature(int *temperature)
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if (!pcipcwd_private.supports_temp)
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return -ENODEV;
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*temperature = inb_p(pcipcwd_private.io_addr);
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/*
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* Convert celsius to fahrenheit, since this was
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* the decided 'standard' for this return value.
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*/
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*temperature = ((inb_p(pcipcwd_private.io_addr)) * 9 / 5) + 32;
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*temperature = (*temperature * 9 / 5) + 32;
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return 0;
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}
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@ -256,7 +331,7 @@ static int pcipcwd_get_temperature(int *temperature)
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*/
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static ssize_t pcipcwd_write(struct file *file, const char __user *data,
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size_t len, loff_t *ppos)
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size_t len, loff_t *ppos)
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{
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/* See if we got the magic character 'V' and reload the timer */
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if (len) {
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@ -381,8 +456,9 @@ static int pcipcwd_ioctl(struct inode *inode, struct file *file,
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static int pcipcwd_open(struct inode *inode, struct file *file)
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{
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/* /dev/watchdog can only be opened once */
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if (test_and_set_bit(0, &is_active))
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if (test_and_set_bit(0, &is_active)) {
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return -EBUSY;
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}
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/* Activate */
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pcipcwd_start();
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@ -492,19 +568,10 @@ static struct notifier_block pcipcwd_notifier = {
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* Init & exit routines
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*/
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static inline void check_temperature_support(void)
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{
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if (inb_p(pcipcwd_private.io_addr) != 0xF0)
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pcipcwd_private.supports_temp = 1;
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}
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static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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int ret = -EIO;
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int got_fw_rev, fw_rev_major, fw_rev_minor;
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char fw_ver_str[20];
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char option_switches;
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cards_found++;
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if (cards_found == 1)
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@ -546,36 +613,10 @@ static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
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pcipcwd_stop();
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/* Check whether or not the card supports the temperature device */
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check_temperature_support();
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pcipcwd_check_temperature_support();
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/* Get the Firmware Version */
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got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
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if (got_fw_rev) {
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sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
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} else {
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sprintf(fw_ver_str, "<card no answer>");
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}
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/* Get switch settings */
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option_switches = inb_p(pcipcwd_private.io_addr + 3);
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printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
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(int) pcipcwd_private.io_addr, fw_ver_str,
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(pcipcwd_private.supports_temp ? "with" : "without"));
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printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
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option_switches,
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((option_switches & 0x10) ? "ON" : "OFF"),
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((option_switches & 0x08) ? "ON" : "OFF"));
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if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
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printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
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if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
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printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
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if (pcipcwd_private.boot_status == 0)
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printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
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/* Show info about the card itself */
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pcipcwd_show_card_info();
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/* Check that the heartbeat value is within it's range ; if not reset to the default */
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if (pcipcwd_set_heartbeat(heartbeat)) {
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@ -656,7 +697,7 @@ static struct pci_driver pcipcwd_driver = {
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static int __init pcipcwd_init_module(void)
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{
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spin_lock_init (&pcipcwd_private.io_lock);
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spin_lock_init(&pcipcwd_private.io_lock);
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return pci_register_driver(&pcipcwd_driver);
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}
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