[WATCHDOG] i6300esb.c: convert to platform device driver
Convert the Intel 6300ESB watchdog timer to a platform device driver. Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Wim Van Sebroeck
parent
04bedfa542
commit
0426fd0d88
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@ -13,7 +13,7 @@
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*
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* The timer is implemented in the following I/O controller hubs:
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* (See the intel documentation on http://developer.intel.com.)
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* 6300ESB chip : document number 300641-003
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* 6300ESB chip : document number 300641-004
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*
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* 2004YYZZ Ross Biro
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* Initial version 0.01
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@ -34,7 +34,7 @@
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#include <linux/mm.h>
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#include <linux/miscdevice.h>
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#include <linux/watchdog.h>
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#include <linux/reboot.h>
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/ioport.h>
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@ -42,7 +42,7 @@
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#include <linux/io.h>
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/* Module and version information */
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#define ESB_VERSION "0.03"
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#define ESB_VERSION "0.04"
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#define ESB_MODULE_NAME "i6300ESB timer"
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#define ESB_DRIVER_NAME ESB_MODULE_NAME ", v" ESB_VERSION
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#define PFX ESB_MODULE_NAME ": "
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@ -81,6 +81,8 @@ static unsigned long timer_alive;
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static struct pci_dev *esb_pci;
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static unsigned short triggered; /* The status of the watchdog upon boot */
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static char esb_expect_close;
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static struct platform_device *esb_platform_device;
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/* module parameters */
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/* 30 sec default heartbeat (1 < heartbeat < 2*1023) */
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@ -319,19 +321,6 @@ static long esb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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}
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}
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/*
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* Notify system
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*/
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static int esb_notify_sys(struct notifier_block *this,
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unsigned long code, void *unused)
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{
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if (code == SYS_DOWN || code == SYS_HALT)
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esb_timer_stop(); /* Turn the WDT off */
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return NOTIFY_DONE;
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}
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/*
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* Kernel Interfaces
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*/
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@ -351,10 +340,6 @@ static struct miscdevice esb_miscdev = {
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.fops = &esb_fops,
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};
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static struct notifier_block esb_notifier = {
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.notifier_call = esb_notify_sys,
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};
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/*
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* Data for PCI driver interface
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*
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@ -373,7 +358,7 @@ MODULE_DEVICE_TABLE(pci, esb_pci_tbl);
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* Init & exit routines
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*/
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static unsigned char __init esb_getdevice(void)
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static unsigned char __devinit esb_getdevice(void)
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{
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u8 val1;
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unsigned short val2;
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@ -444,7 +429,7 @@ err_devput:
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return 0;
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}
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static int __init watchdog_init(void)
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static int __devinit esb_probe(struct platform_device *dev)
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{
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int ret;
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@ -460,19 +445,13 @@ static int __init watchdog_init(void)
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"heartbeat value must be 1<heartbeat<2046, using %d\n",
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heartbeat);
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}
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ret = register_reboot_notifier(&esb_notifier);
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if (ret != 0) {
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printk(KERN_ERR PFX
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"cannot register reboot notifier (err=%d)\n", ret);
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goto err_unmap;
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}
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ret = misc_register(&esb_miscdev);
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if (ret != 0) {
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printk(KERN_ERR PFX
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"cannot register miscdev on minor=%d (err=%d)\n",
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WATCHDOG_MINOR, ret);
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goto err_notifier;
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goto err_unmap;
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}
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esb_timer_stop();
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printk(KERN_INFO PFX
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@ -480,8 +459,6 @@ static int __init watchdog_init(void)
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BASEADDR, heartbeat, nowayout);
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return 0;
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err_notifier:
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unregister_reboot_notifier(&esb_notifier);
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err_unmap:
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iounmap(BASEADDR);
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/* err_release: */
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@ -493,7 +470,7 @@ err_unmap:
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return ret;
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}
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static void __exit watchdog_cleanup(void)
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static int __devexit esb_remove(struct platform_device *dev)
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{
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/* Stop the timer before we leave */
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if (!nowayout)
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@ -501,11 +478,58 @@ static void __exit watchdog_cleanup(void)
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/* Deregister */
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misc_deregister(&esb_miscdev);
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unregister_reboot_notifier(&esb_notifier);
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iounmap(BASEADDR);
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pci_release_region(esb_pci, 0);
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pci_disable_device(esb_pci);
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pci_dev_put(esb_pci);
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return 0;
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}
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static void esb_shutdown(struct platform_device *dev)
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{
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esb_timer_stop();
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}
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static struct platform_driver esb_platform_driver = {
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.probe = esb_probe,
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.remove = __devexit_p(esb_remove),
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.shutdown = esb_shutdown,
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.driver = {
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.owner = THIS_MODULE,
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.name = ESB_MODULE_NAME,
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},
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};
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static int __init watchdog_init(void)
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{
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int err;
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printk(KERN_INFO PFX "Intel 6300ESB WatchDog Timer Driver v%s\n",
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ESB_VERSION);
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err = platform_driver_register(&esb_platform_driver);
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if (err)
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return err;
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esb_platform_device = platform_device_register_simple(ESB_MODULE_NAME,
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-1, NULL, 0);
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if (IS_ERR(esb_platform_device)) {
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err = PTR_ERR(esb_platform_device);
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goto unreg_platform_driver;
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}
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return 0;
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unreg_platform_driver:
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platform_driver_unregister(&esb_platform_driver);
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return err;
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}
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static void __exit watchdog_cleanup(void)
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{
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platform_device_unregister(esb_platform_device);
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platform_driver_unregister(&esb_platform_driver);
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printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
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}
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module_init(watchdog_init);
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