drivers/watchdog/i6300esb.c

110 static inline void esb_unlock_registers(struct esb_dev *edev)
112 	writew(ESB_UNLOCK1, ESB_RELOAD_REG(edev));
113 	writew(ESB_UNLOCK2, ESB_RELOAD_REG(edev));
118 	struct esb_dev *edev = to_esb_dev(wdd);
122 	esb_unlock_registers(edev);
123 	writew(ESB_WDT_RELOAD, ESB_RELOAD_REG(edev));
126 	pci_write_config_byte(edev->pdev, ESB_LOCK_REG, val);
132 	struct esb_dev *edev = to_esb_dev(wdd);
136 	esb_unlock_registers(edev);
137 	writew(ESB_WDT_RELOAD, ESB_RELOAD_REG(edev));
139 	pci_write_config_byte(edev->pdev, ESB_LOCK_REG, 0x0);
140 	pci_read_config_byte(edev->pdev, ESB_LOCK_REG, &val);
148 	struct esb_dev *edev = to_esb_dev(wdd);
150 	esb_unlock_registers(edev);
151 	writew(ESB_WDT_RELOAD, ESB_RELOAD_REG(edev));
159 	struct esb_dev *edev = to_esb_dev(wdd);
169 	esb_unlock_registers(edev);
170 	writel(val, ESB_TIMER1_REG(edev));
173 	esb_unlock_registers(edev);
174 	writel(val, ESB_TIMER2_REG(edev));
177 	esb_unlock_registers(edev);
178 	writew(ESB_WDT_RELOAD, ESB_RELOAD_REG(edev));
217 static unsigned char esb_getdevice(struct esb_dev *edev)
219 	if (pci_enable_device(edev->pdev)) {
220 		dev_err(&edev->pdev->dev, "failed to enable device\n");
224 	if (pci_request_region(edev->pdev, 0, ESB_MODULE_NAME)) {
225 		dev_err(&edev->pdev->dev, "failed to request region\n");
229 	edev->base = pci_ioremap_bar(edev->pdev, 0);
230 	if (edev->base == NULL) {
232 		dev_err(&edev->pdev->dev, "failed to get BASEADDR\n");
237 	dev_set_drvdata(&edev->pdev->dev, edev);
241 	pci_release_region(edev->pdev, 0);
243 	pci_disable_device(edev->pdev);
248 static void esb_initdevice(struct esb_dev *edev)
265 	pci_write_config_word(edev->pdev, ESB_CONFIG_REG, 0x0003);
268 	pci_read_config_byte(edev->pdev, ESB_LOCK_REG, &val1);
270 		dev_warn(&edev->pdev->dev, "nowayout already set\n");
273 	pci_write_config_byte(edev->pdev, ESB_LOCK_REG, 0x00);
276 	esb_unlock_registers(edev);
277 	val2 = readw(ESB_RELOAD_REG(edev));
279 		edev->wdd.bootstatus = WDIOF_CARDRESET;
282 	esb_unlock_registers(edev);
283 	writew((ESB_WDT_TIMEOUT | ESB_WDT_RELOAD), ESB_RELOAD_REG(edev));
286 	esb_timer_set_heartbeat(&edev->wdd, edev->wdd.timeout);
292 	struct esb_dev *edev;
295 	edev = devm_kzalloc(&pdev->dev, sizeof(*edev), GFP_KERNEL);
296 	if (!edev)
300 	edev->pdev = pdev;
301 	if (!esb_getdevice(edev))
305 	edev->wdd.info = &esb_info;
306 	edev->wdd.ops = &esb_ops;
307 	edev->wdd.min_timeout = ESB_HEARTBEAT_MIN;
308 	edev->wdd.max_timeout = ESB_HEARTBEAT_MAX;
309 	edev->wdd.timeout = ESB_HEARTBEAT_DEFAULT;
310 	watchdog_init_timeout(&edev->wdd, heartbeat, NULL);
311 	watchdog_set_nowayout(&edev->wdd, nowayout);
312 	watchdog_stop_on_reboot(&edev->wdd);
313 	watchdog_stop_on_unregister(&edev->wdd);
314 	esb_initdevice(edev);
317 	ret = watchdog_register_device(&edev->wdd);
322 		edev->wdd.timeout, nowayout);
326 	iounmap(edev->base);
327 	pci_release_region(edev->pdev, 0);
328 	pci_disable_device(edev->pdev);
334 	struct esb_dev *edev = dev_get_drvdata(&pdev->dev);
336 	watchdog_unregister_device(&edev->wdd);
337 	iounmap(edev->base);
338 	pci_release_region(edev->pdev, 0);
339 	pci_disable_device(edev->pdev);