diff options
Diffstat (limited to 'drivers/char/watchdog/pcwd_usb.c')
| -rw-r--r-- | drivers/char/watchdog/pcwd_usb.c | 824 |
1 files changed, 0 insertions, 824 deletions
diff --git a/drivers/char/watchdog/pcwd_usb.c b/drivers/char/watchdog/pcwd_usb.c deleted file mode 100644 index 0f3fd6c9c35..00000000000 --- a/drivers/char/watchdog/pcwd_usb.c +++ /dev/null @@ -1,824 +0,0 @@ -/* - * Berkshire USB-PC Watchdog Card Driver - * - * (c) Copyright 2004-2007 Wim Van Sebroeck <wim@iguana.be>. - * - * Based on source code of the following authors: - * Ken Hollis <kenji@bitgate.com>, - * Alan Cox <alan@redhat.com>, - * Matt Domsch <Matt_Domsch@dell.com>, - * Rob Radez <rob@osinvestor.com>, - * Greg Kroah-Hartman <greg@kroah.com> - * - * 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. - * - * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor - * provide warranty for any of this software. This material is - * provided "AS-IS" and at no charge. - * - * Thanks also to Simon Machell at Berkshire Products Inc. for - * providing the test hardware. More info is available at - * http://www.berkprod.com/ or http://www.pcwatchdog.com/ - */ - -#include <linux/module.h> /* For module specific items */ -#include <linux/moduleparam.h> /* For new moduleparam's */ -#include <linux/types.h> /* For standard types (like size_t) */ -#include <linux/errno.h> /* For the -ENODEV/... values */ -#include <linux/kernel.h> /* For printk/panic/... */ -#include <linux/delay.h> /* For mdelay function */ -#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ -#include <linux/watchdog.h> /* For the watchdog specific items */ -#include <linux/notifier.h> /* For notifier support */ -#include <linux/reboot.h> /* For reboot_notifier stuff */ -#include <linux/init.h> /* For __init/__exit/... */ -#include <linux/fs.h> /* For file operations */ -#include <linux/usb.h> /* For USB functions */ -#include <linux/slab.h> /* For kmalloc, ... */ -#include <linux/mutex.h> /* For mutex locking */ -#include <linux/hid.h> /* For HID_REQ_SET_REPORT & HID_DT_REPORT */ - -#include <asm/uaccess.h> /* For copy_to_user/put_user/... */ - - -#ifdef CONFIG_USB_DEBUG - static int debug = 1; -#else - static int debug; -#endif - -/* Use our own dbg macro */ -#undef dbg -#define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG PFX format "\n" , ## arg); } while (0) - - -/* Module and Version Information */ -#define DRIVER_VERSION "1.02" -#define DRIVER_DATE "21 Jan 2007" -#define DRIVER_AUTHOR "Wim Van Sebroeck <wim@iguana.be>" -#define DRIVER_DESC "Berkshire USB-PC Watchdog driver" -#define DRIVER_LICENSE "GPL" -#define DRIVER_NAME "pcwd_usb" -#define PFX DRIVER_NAME ": " - -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_LICENSE(DRIVER_LICENSE); -MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); -MODULE_ALIAS_MISCDEV(TEMP_MINOR); - -/* Module Parameters */ -module_param(debug, int, 0); -MODULE_PARM_DESC(debug, "Debug enabled or not"); - -#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */ -static int heartbeat = WATCHDOG_HEARTBEAT; -module_param(heartbeat, int, 0); -MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); - -static int nowayout = WATCHDOG_NOWAYOUT; -module_param(nowayout, int, 0); -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); - -/* The vendor and product id's for the USB-PC Watchdog card */ -#define USB_PCWD_VENDOR_ID 0x0c98 -#define USB_PCWD_PRODUCT_ID 0x1140 - -/* table of devices that work with this driver */ -static struct usb_device_id usb_pcwd_table [] = { - { USB_DEVICE(USB_PCWD_VENDOR_ID, USB_PCWD_PRODUCT_ID) }, - { } /* Terminating entry */ -}; -MODULE_DEVICE_TABLE (usb, usb_pcwd_table); - -/* according to documentation max. time to process a command for the USB - * watchdog card is 100 or 200 ms, so we give it 250 ms to do it's job */ -#define USB_COMMAND_TIMEOUT 250 - -/* Watchdog's internal commands */ -#define CMD_READ_TEMP 0x02 /* Read Temperature; Re-trigger Watchdog */ -#define CMD_TRIGGER CMD_READ_TEMP -#define CMD_GET_STATUS 0x04 /* Get Status Information */ -#define CMD_GET_FIRMWARE_VERSION 0x08 /* Get Firmware Version */ -#define CMD_GET_DIP_SWITCH_SETTINGS 0x0c /* Get Dip Switch Settings */ -#define CMD_READ_WATCHDOG_TIMEOUT 0x18 /* Read Current Watchdog Time */ -#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19 /* Write Current Watchdog Time */ -#define CMD_ENABLE_WATCHDOG 0x30 /* Enable / Disable Watchdog */ -#define CMD_DISABLE_WATCHDOG CMD_ENABLE_WATCHDOG - -/* Watchdog's Dip Switch heartbeat values */ -static const int heartbeat_tbl [] = { - 5, /* OFF-OFF-OFF = 5 Sec */ - 10, /* OFF-OFF-ON = 10 Sec */ - 30, /* OFF-ON-OFF = 30 Sec */ - 60, /* OFF-ON-ON = 1 Min */ - 300, /* ON-OFF-OFF = 5 Min */ - 600, /* ON-OFF-ON = 10 Min */ - 1800, /* ON-ON-OFF = 30 Min */ - 3600, /* ON-ON-ON = 1 hour */ -}; - -/* We can only use 1 card due to the /dev/watchdog restriction */ -static int cards_found; - -/* some internal variables */ -static unsigned long is_active; -static char expect_release; - -/* Structure to hold all of our device specific stuff */ -struct usb_pcwd_private { - struct usb_device * udev; /* save off the usb device pointer */ - struct usb_interface * interface; /* the interface for this device */ - - unsigned int interface_number; /* the interface number used for cmd's */ - - unsigned char * intr_buffer; /* the buffer to intr data */ - dma_addr_t intr_dma; /* the dma address for the intr buffer */ - size_t intr_size; /* the size of the intr buffer */ - struct urb * intr_urb; /* the urb used for the intr pipe */ - - unsigned char cmd_command; /* The command that is reported back */ - unsigned char cmd_data_msb; /* The data MSB that is reported back */ - unsigned char cmd_data_lsb; /* The data LSB that is reported back */ - atomic_t cmd_received; /* true if we received a report after a command */ - - int exists; /* Wether or not the device exists */ - struct mutex mtx; /* locks this structure */ -}; -static struct usb_pcwd_private *usb_pcwd_device; - -/* prevent races between open() and disconnect() */ -static DEFINE_MUTEX(disconnect_mutex); - -/* local function prototypes */ -static int usb_pcwd_probe (struct usb_interface *interface, const struct usb_device_id *id); -static void usb_pcwd_disconnect (struct usb_interface *interface); - -/* usb specific object needed to register this driver with the usb subsystem */ -static struct usb_driver usb_pcwd_driver = { - .name = DRIVER_NAME, - .probe = usb_pcwd_probe, - .disconnect = usb_pcwd_disconnect, - .id_table = usb_pcwd_table, -}; - - -static void usb_pcwd_intr_done(struct urb *urb) -{ - struct usb_pcwd_private *usb_pcwd = (struct usb_pcwd_private *)urb->context; - unsigned char *data = usb_pcwd->intr_buffer; - int retval; - - switch (urb->status) { - case 0: /* success */ - break; - case -ECONNRESET: /* unlink */ - case -ENOENT: - case -ESHUTDOWN: - /* this urb is terminated, clean up */ - dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); - return; - /* -EPIPE: should clear the halt */ - default: /* error */ - dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); - goto resubmit; - } - - dbg("received following data cmd=0x%02x msb=0x%02x lsb=0x%02x", - data[0], data[1], data[2]); - - usb_pcwd->cmd_command = data[0]; - usb_pcwd->cmd_data_msb = data[1]; - usb_pcwd->cmd_data_lsb = data[2]; - - /* notify anyone waiting that the cmd has finished */ - atomic_set (&usb_pcwd->cmd_received, 1); - -resubmit: - retval = usb_submit_urb (urb, GFP_ATOMIC); - if (retval) - printk(KERN_ERR PFX "can't resubmit intr, usb_submit_urb failed with result %d\n", - retval); -} - -static int usb_pcwd_send_command(struct usb_pcwd_private *usb_pcwd, unsigned char cmd, - unsigned char *msb, unsigned char *lsb) -{ - int got_response, count; - unsigned char buf[6]; - - /* We will not send any commands if the USB PCWD device does not exist */ - if ((!usb_pcwd) || (!usb_pcwd->exists)) - return -1; - - /* The USB PC Watchdog uses a 6 byte report format. The board currently uses - * only 3 of the six bytes of the report. */ - buf[0] = cmd; /* Byte 0 = CMD */ - buf[1] = *msb; /* Byte 1 = Data MSB */ - buf[2] = *lsb; /* Byte 2 = Data LSB */ - buf[3] = buf[4] = buf[5] = 0; /* All other bytes not used */ - - dbg("sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x", - buf[0], buf[1], buf[2]); - - atomic_set (&usb_pcwd->cmd_received, 0); - - if (usb_control_msg(usb_pcwd->udev, usb_sndctrlpipe(usb_pcwd->udev, 0), - HID_REQ_SET_REPORT, HID_DT_REPORT, - 0x0200, usb_pcwd->interface_number, buf, sizeof(buf), - USB_COMMAND_TIMEOUT) != sizeof(buf)) { - dbg("usb_pcwd_send_command: error in usb_control_msg for cmd 0x%x 0x%x 0x%x\n", cmd, *msb, *lsb); - } - /* wait till the usb card processed the command, - * with a max. timeout of USB_COMMAND_TIMEOUT */ - got_response = 0; - for (count = 0; (count < USB_COMMAND_TIMEOUT) && (!got_response); count++) { - mdelay(1); - if (atomic_read (&usb_pcwd->cmd_received)) - got_response = 1; - } - - if ((got_response) && (cmd == usb_pcwd->cmd_command)) { - /* read back response */ - *msb = usb_pcwd->cmd_data_msb; - *lsb = usb_pcwd->cmd_data_lsb; - } - - return got_response; -} - -static int usb_pcwd_start(struct usb_pcwd_private *usb_pcwd) -{ - unsigned char msb = 0x00; - unsigned char lsb = 0x00; - int retval; - - /* Enable Watchdog */ - retval = usb_pcwd_send_command(usb_pcwd, CMD_ENABLE_WATCHDOG, &msb, &lsb); - - if ((retval == 0) || (lsb == 0)) { - printk(KERN_ERR PFX "Card did not acknowledge enable attempt\n"); - return -1; - } - - return 0; -} - -static int usb_pcwd_stop(struct usb_pcwd_private *usb_pcwd) -{ - unsigned char msb = 0xA5; - unsigned char lsb = 0xC3; - int retval; - - /* Disable Watchdog */ - retval = usb_pcwd_send_command(usb_pcwd, CMD_DISABLE_WATCHDOG, &msb, &lsb); - - if ((retval == 0) || (lsb != 0)) { - printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n"); - return -1; - } - - return 0; -} - -static int usb_pcwd_keepalive(struct usb_pcwd_private *usb_pcwd) -{ - unsigned char dummy; - - /* Re-trigger Watchdog */ - usb_pcwd_send_command(usb_pcwd, CMD_TRIGGER, &dummy, &dummy); - - return 0; -} - -static int usb_pcwd_set_heartbeat(struct usb_pcwd_private *usb_pcwd, int t) -{ - unsigned char msb = t / 256; - unsigned char lsb = t % 256; - - if ((t < 0x0001) || (t > 0xFFFF)) - return -EINVAL; - - /* Write new heartbeat to watchdog */ - usb_pcwd_send_command(usb_pcwd, CMD_WRITE_WATCHDOG_TIMEOUT, &msb, &lsb); - - heartbeat = t; - return 0; -} - -static int usb_pcwd_get_temperature(struct usb_pcwd_private *usb_pcwd, int *temperature) -{ - unsigned char msb, lsb; - - usb_pcwd_send_command(usb_pcwd, CMD_READ_TEMP, &msb, &lsb); - - /* - * Convert celsius to fahrenheit, since this was - * the decided 'standard' for this return value. - */ - *temperature = (lsb * 9 / 5) + 32; - - return 0; -} - -static int usb_pcwd_get_timeleft(struct usb_pcwd_private *usb_pcwd, int *time_left) -{ - unsigned char msb, lsb; - - /* Read the time that's left before rebooting */ - /* Note: if the board is not yet armed then we will read 0xFFFF */ - usb_pcwd_send_command(usb_pcwd, CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb); - - *time_left = (msb << 8) + lsb; - - return 0; -} - -/* - * /dev/watchdog handling - */ - -static ssize_t usb_pcwd_write(struct file *file, const char __user *data, - size_t len, loff_t *ppos) -{ - /* See if we got the magic character 'V' and reload the timer */ - if (len) { - if (!nowayout) { - size_t i; - - /* note: just in case someone wrote the magic character - * five months ago... */ - expect_release = 0; - - /* scan to see whether or not we got the magic character */ - for (i = 0; i != len; i++) { - char c; - if(get_user(c, data+i)) - return -EFAULT; - if (c == 'V') - expect_release = 42; - } - } - - /* someone wrote to us, we should reload the timer */ - usb_pcwd_keepalive(usb_pcwd_device); - } - return len; -} - -static int usb_pcwd_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - void __user *argp = (void __user *)arg; - int __user *p = argp; - static struct watchdog_info ident = { - .options = WDIOF_KEEPALIVEPING | - WDIOF_SETTIMEOUT | - WDIOF_MAGICCLOSE, - .firmware_version = 1, - .identity = DRIVER_NAME, - }; - - 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_GETTEMP: - { - int temperature; - - if (usb_pcwd_get_temperature(usb_pcwd_device, &temperature)) - return -EFAULT; - - return put_user(temperature, p); - } - - case WDIOC_KEEPALIVE: - usb_pcwd_keepalive(usb_pcwd_device); - return 0; - - case WDIOC_SETOPTIONS: - { - int new_options, retval = -EINVAL; - - if (get_user (new_options, p)) - return -EFAULT; - - if (new_options & WDIOS_DISABLECARD) { - usb_pcwd_stop(usb_pcwd_device); - retval = 0; - } - - if (new_options & WDIOS_ENABLECARD) { - usb_pcwd_start(usb_pcwd_device); - retval = 0; - } - - return retval; - } - - case WDIOC_SETTIMEOUT: - { - int new_heartbeat; - - if (get_user(new_heartbeat, p)) - return -EFAULT; - - if (usb_pcwd_set_heartbeat(usb_pcwd_device, new_heartbeat)) - return -EINVAL; - - usb_pcwd_keepalive(usb_pcwd_device); - /* Fall */ - } - - case WDIOC_GETTIMEOUT: - return put_user(heartbeat, p); - - case WDIOC_GETTIMELEFT: - { - int time_left; - - if (usb_pcwd_get_timeleft(usb_pcwd_device, &time_left)) - return -EFAULT; - - return put_user(time_left, p); - } - - default: - return -ENOTTY; - } -} - -static int usb_pcwd_open(struct inode *inode, struct file *file) -{ - /* /dev/watchdog can only be opened once */ - if (test_and_set_bit(0, &is_active)) - return -EBUSY; - - /* Activate */ - usb_pcwd_start(usb_pcwd_device); - usb_pcwd_keepalive(usb_pcwd_device); - return nonseekable_open(inode, file); -} - -static int usb_pcwd_release(struct inode *inode, struct file *file) -{ - /* - * Shut off the timer. - */ - if (expect_release == 42) { - usb_pcwd_stop(usb_pcwd_device); - } else { - printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); - usb_pcwd_keepalive(usb_pcwd_device); - } - expect_release = 0; - clear_bit(0, &is_active); - return 0; -} - -/* - * /dev/temperature handling - */ - -static ssize_t usb_pcwd_temperature_read(struct file *file, char __user *data, - size_t len, loff_t *ppos) -{ - int temperature; - - if (usb_pcwd_get_temperature(usb_pcwd_device, &temperature)) - return -EFAULT; - - if (copy_to_user(data, &temperature, 1)) - return -EFAULT; - - return 1; -} - -static int usb_pcwd_temperature_open(struct inode *inode, struct file *file) -{ - return nonseekable_open(inode, file); -} - -static int usb_pcwd_temperature_release(struct inode *inode, struct file *file) -{ - return 0; -} - -/* - * Notify system - */ - -static int usb_pcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused) -{ - if (code==SYS_DOWN || code==SYS_HALT) { - /* Turn the WDT off */ - usb_pcwd_stop(usb_pcwd_device); - } - - return NOTIFY_DONE; -} - -/* - * Kernel Interfaces - */ - -static const struct file_operations usb_pcwd_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = usb_pcwd_write, - .ioctl = usb_pcwd_ioctl, - .open = usb_pcwd_open, - .release = usb_pcwd_release, -}; - -static struct miscdevice usb_pcwd_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &usb_pcwd_fops, -}; - -static const struct file_operations usb_pcwd_temperature_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .read = usb_pcwd_temperature_read, - .open = usb_pcwd_temperature_open, - .release = usb_pcwd_temperature_release, -}; - -static struct miscdevice usb_pcwd_temperature_miscdev = { - .minor = TEMP_MINOR, - .name = "temperature", - .fops = &usb_pcwd_temperature_fops, -}; - -static struct notifier_block usb_pcwd_notifier = { - .notifier_call = usb_pcwd_notify_sys, -}; - -/** - * usb_pcwd_delete - */ -static inline void usb_pcwd_delete (struct usb_pcwd_private *usb_pcwd) -{ - usb_free_urb(usb_pcwd->intr_urb); - if (usb_pcwd->intr_buffer != NULL) - usb_buffer_free(usb_pcwd->udev, usb_pcwd->intr_size, - usb_pcwd->intr_buffer, usb_pcwd->intr_dma); - kfree (usb_pcwd); -} - -/** - * usb_pcwd_probe - * - * Called by the usb core when a new device is connected that it thinks - * this driver might be interested in. - */ -static int usb_pcwd_probe(struct usb_interface *interface, const struct usb_device_id *id) -{ - struct usb_device *udev = interface_to_usbdev(interface); - struct usb_host_interface *iface_desc; - struct usb_endpoint_descriptor *endpoint; - struct usb_pcwd_private *usb_pcwd = NULL; - int pipe, maxp; - int retval = -ENOMEM; - int got_fw_rev; - unsigned char fw_rev_major, fw_rev_minor; - char fw_ver_str[20]; - unsigned char option_switches, dummy; - - cards_found++; - if (cards_found > 1) { - printk(KERN_ERR PFX "This driver only supports 1 device\n"); - return -ENODEV; - } - - /* get the active interface descriptor */ - iface_desc = interface->cur_altsetting; - - /* check out that we have a HID device */ - if (!(iface_desc->desc.bInterfaceClass == USB_CLASS_HID)) { - printk(KERN_ERR PFX "The device isn't a Human Interface Device\n"); - return -ENODEV; - } - - /* check out the endpoint: it has to be Interrupt & IN */ - endpoint = &iface_desc->endpoint[0].desc; - - if (!((endpoint->bEndpointAddress & USB_DIR_IN) && - ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) - == USB_ENDPOINT_XFER_INT))) { - /* we didn't find a Interrupt endpoint with direction IN */ - printk(KERN_ERR PFX "Couldn't find an INTR & IN endpoint\n"); - return -ENODEV; - } - - /* get a handle to the interrupt data pipe */ - pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress); - maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe)); - - /* allocate memory for our device and initialize it */ - usb_pcwd = kzalloc (sizeof(struct usb_pcwd_private), GFP_KERNEL); - if (usb_pcwd == NULL) { - printk(KERN_ERR PFX "Out of memory\n"); - goto error; - } - - usb_pcwd_device = usb_pcwd; - - mutex_init(&usb_pcwd->mtx); - usb_pcwd->udev = udev; - usb_pcwd->interface = interface; - usb_pcwd->interface_number = iface_desc->desc.bInterfaceNumber; - usb_pcwd->intr_size = (le16_to_cpu(endpoint->wMaxPacketSize) > 8 ? le16_to_cpu(endpoint->wMaxPacketSize) : 8); - - /* set up the memory buffer's */ - if (!(usb_pcwd->intr_buffer = usb_buffer_alloc(udev, usb_pcwd->intr_size, GFP_ATOMIC, &usb_pcwd->intr_dma))) { - printk(KERN_ERR PFX "Out of memory\n"); - goto error; - } - - /* allocate the urb's */ - usb_pcwd->intr_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!usb_pcwd->intr_urb) { - printk(KERN_ERR PFX "Out of memory\n"); - goto error; - } - - /* initialise the intr urb's */ - usb_fill_int_urb(usb_pcwd->intr_urb, udev, pipe, - usb_pcwd->intr_buffer, usb_pcwd->intr_size, - usb_pcwd_intr_done, usb_pcwd, endpoint->bInterval); - usb_pcwd->intr_urb->transfer_dma = usb_pcwd->intr_dma; - usb_pcwd->intr_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - - /* register our interrupt URB with the USB system */ - if (usb_submit_urb(usb_pcwd->intr_urb, GFP_KERNEL)) { - printk(KERN_ERR PFX "Problem registering interrupt URB\n"); - retval = -EIO; /* failure */ - goto error; - } - - /* The device exists and can be communicated with */ - usb_pcwd->exists = 1; - - /* disable card */ - usb_pcwd_stop(usb_pcwd); - - /* Get the Firmware Version */ - got_fw_rev = usb_pcwd_send_command(usb_pcwd, 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>"); - } - - printk(KERN_INFO PFX "Found card (Firmware: %s) with temp option\n", - fw_ver_str); - - /* Get switch settings */ - usb_pcwd_send_command(usb_pcwd, CMD_GET_DIP_SWITCH_SETTINGS, &dummy, &option_switches); - - 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 heartbeat = 0 then we use the heartbeat from the dip-switches */ - if (heartbeat == 0) - heartbeat = heartbeat_tbl[(option_switches & 0x07)]; - - /* Check that the heartbeat value is within it's range ; if not reset to the default */ - if (usb_pcwd_set_heartbeat(usb_pcwd, heartbeat)) { - usb_pcwd_set_heartbeat(usb_pcwd, WATCHDOG_HEARTBEAT); - printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n", - WATCHDOG_HEARTBEAT); - } - - retval = register_reboot_notifier(&usb_pcwd_notifier); - if (retval != 0) { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - retval); - goto error; - } - - retval = misc_register(&usb_pcwd_temperature_miscdev); - if (retval != 0) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - TEMP_MINOR, retval); - goto err_out_unregister_reboot; - } - - retval = misc_register(&usb_pcwd_miscdev); - if (retval != 0) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - WATCHDOG_MINOR, retval); - goto err_out_misc_deregister; - } - - /* we can register the device now, as it is ready */ - usb_set_intfdata (interface, usb_pcwd); - - printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", - heartbeat, nowayout); - - return 0; - -err_out_misc_deregister: - misc_deregister(&usb_pcwd_temperature_miscdev); -err_out_unregister_reboot: - unregister_reboot_notifier(&usb_pcwd_notifier); -error: - if (usb_pcwd) - usb_pcwd_delete(usb_pcwd); - usb_pcwd_device = NULL; - return retval; -} - - -/** - * usb_pcwd_disconnect - * - * Called by the usb core when the device is removed from the system. - * - * This routine guarantees that the driver will not submit any more urbs - * by clearing dev->udev. - */ -static void usb_pcwd_disconnect(struct usb_interface *interface) -{ - struct usb_pcwd_private *usb_pcwd; - - /* prevent races with open() */ - mutex_lock(&disconnect_mutex); - - usb_pcwd = usb_get_intfdata (interface); - usb_set_intfdata (interface, NULL); - - mutex_lock(&usb_pcwd->mtx); - - /* Stop the timer before we leave */ - if (!nowayout) - usb_pcwd_stop(usb_pcwd); - - /* We should now stop communicating with the USB PCWD device */ - usb_pcwd->exists = 0; - - /* Deregister */ - misc_deregister(&usb_pcwd_miscdev); - misc_deregister(&usb_pcwd_temperature_miscdev); - unregister_reboot_notifier(&usb_pcwd_notifier); - - mutex_unlock(&usb_pcwd->mtx); - - /* Delete the USB PCWD device */ - usb_pcwd_delete(usb_pcwd); - - cards_found--; - - mutex_unlock(&disconnect_mutex); - - printk(KERN_INFO PFX "USB PC Watchdog disconnected\n"); -} - - - -/** - * usb_pcwd_init - */ -static int __init usb_pcwd_init(void) -{ - int result; - - /* register this driver with the USB subsystem */ - result = usb_register(&usb_pcwd_driver); - if (result) { - printk(KERN_ERR PFX "usb_register failed. Error number %d\n", - result); - return result; - } - - printk(KERN_INFO PFX DRIVER_DESC " v" DRIVER_VERSION " (" DRIVER_DATE ")\n"); - return 0; -} - - -/** - * usb_pcwd_exit - */ -static void __exit usb_pcwd_exit(void) -{ - /* deregister this driver with the USB subsystem */ - usb_deregister(&usb_pcwd_driver); -} - - -module_init (usb_pcwd_init); -module_exit (usb_pcwd_exit); |