71 #define TCOBASE(p)	((p)->tco_res->start)  argument
73 #define SMI_EN(p)	((p)->smi_res->start)  argument
75 #define TCO_RLD(p)	(TCOBASE(p) + 0x00) /* TCO Timer Reload/Curr. Value */  argument
76 #define TCOv1_TMR(p)	(TCOBASE(p) + 0x01) /* TCOv1 Timer Initial Value*/  argument
77 #define TCO_DAT_IN(p)	(TCOBASE(p) + 0x02) /* TCO Data In Register	*/  argument
78 #define TCO_DAT_OUT(p)	(TCOBASE(p) + 0x03) /* TCO Data Out Register	*/  argument
79 #define TCO1_STS(p)	(TCOBASE(p) + 0x04) /* TCO1 Status Register	*/  argument
80 #define TCO2_STS(p)	(TCOBASE(p) + 0x06) /* TCO2 Status Register	*/  argument
81 #define TCO1_CNT(p)	(TCOBASE(p) + 0x08) /* TCO1 Control Register	*/  argument
82 #define TCO2_CNT(p)	(TCOBASE(p) + 0x0a) /* TCO2 Control Register	*/  argument
83 #define TCOv2_TMR(p)	(TCOBASE(p) + 0x12) /* TCOv2 Timer Initial Value*/  argument
114 	int (*update_no_reboot_bit)(void *p, bool set);
145 static inline unsigned int seconds_to_ticks(struct iTCO_wdt_private *p,  in seconds_to_ticks()  argument
148 	return p->iTCO_version == 3 ? secs : (secs * 10) / 6;  in seconds_to_ticks()
151 static inline unsigned int ticks_to_seconds(struct iTCO_wdt_private *p,  in ticks_to_seconds()  argument
154 	return p->iTCO_version == 3 ? ticks : (ticks * 6) / 10;  in ticks_to_seconds()
157 static inline u32 no_reboot_bit(struct iTCO_wdt_private *p)  in no_reboot_bit()  argument
161 	switch (p->iTCO_version) {  in no_reboot_bit()
186 	struct iTCO_wdt_private *p = priv;  in update_no_reboot_bit_pci()  local
189 	pci_read_config_dword(p->pci_dev, 0xd4, &val32);  in update_no_reboot_bit_pci()
191 		val32 |= no_reboot_bit(p);  in update_no_reboot_bit_pci()
193 		val32 &= ~no_reboot_bit(p);  in update_no_reboot_bit_pci()
194 	pci_write_config_dword(p->pci_dev, 0xd4, val32);  in update_no_reboot_bit_pci()
195 	pci_read_config_dword(p->pci_dev, 0xd4, &newval32);  in update_no_reboot_bit_pci()
206 	struct iTCO_wdt_private *p = priv;  in update_no_reboot_bit_mem()  local
209 	val32 = readl(p->gcs_pmc);  in update_no_reboot_bit_mem()
211 		val32 |= no_reboot_bit(p);  in update_no_reboot_bit_mem()
213 		val32 &= ~no_reboot_bit(p);  in update_no_reboot_bit_mem()
214 	writel(val32, p->gcs_pmc);  in update_no_reboot_bit_mem()
215 	newval32 = readl(p->gcs_pmc);  in update_no_reboot_bit_mem()
226 	struct iTCO_wdt_private *p = priv;  in update_no_reboot_bit_cnt()  local
239 	val = inw(TCO1_CNT(p)) & ~NMI_NOW;  in update_no_reboot_bit_cnt()
244 	outw(val, TCO1_CNT(p));  in update_no_reboot_bit_cnt()
245 	newval = inw(TCO1_CNT(p)) & ~NMI_NOW;  in update_no_reboot_bit_cnt()
260 static void iTCO_wdt_no_reboot_bit_setup(struct iTCO_wdt_private *p,  in iTCO_wdt_no_reboot_bit_setup()  argument
267 		p->update_no_reboot_bit = update_no_reboot_bit_pmc;  in iTCO_wdt_no_reboot_bit_setup()
268 		p->no_reboot_priv = pmc;  in iTCO_wdt_no_reboot_bit_setup()
272 	if (p->iTCO_version >= 6)  in iTCO_wdt_no_reboot_bit_setup()
273 		p->update_no_reboot_bit = update_no_reboot_bit_cnt;  in iTCO_wdt_no_reboot_bit_setup()
274 	else if (p->iTCO_version >= 2)  in iTCO_wdt_no_reboot_bit_setup()
275 		p->update_no_reboot_bit = update_no_reboot_bit_mem;  in iTCO_wdt_no_reboot_bit_setup()
276 	else if (p->iTCO_version == 1)  in iTCO_wdt_no_reboot_bit_setup()
277 		p->update_no_reboot_bit = update_no_reboot_bit_pci;  in iTCO_wdt_no_reboot_bit_setup()
279 		p->update_no_reboot_bit = update_no_reboot_bit_def;  in iTCO_wdt_no_reboot_bit_setup()
281 	p->no_reboot_priv = p;  in iTCO_wdt_no_reboot_bit_setup()
286 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_start()  local
289 	spin_lock(&p->io_lock);  in iTCO_wdt_start()
291 	iTCO_vendor_pre_start(p->smi_res, wd_dev->timeout);  in iTCO_wdt_start()
294 	if (p->update_no_reboot_bit(p->no_reboot_priv, false)) {  in iTCO_wdt_start()
295 		spin_unlock(&p->io_lock);  in iTCO_wdt_start()
302 	if (p->iTCO_version >= 2)  in iTCO_wdt_start()
303 		outw(0x01, TCO_RLD(p));  in iTCO_wdt_start()
304 	else if (p->iTCO_version == 1)  in iTCO_wdt_start()
305 		outb(0x01, TCO_RLD(p));  in iTCO_wdt_start()
308 	val = inw(TCO1_CNT(p));  in iTCO_wdt_start()
310 	outw(val, TCO1_CNT(p));  in iTCO_wdt_start()
311 	val = inw(TCO1_CNT(p));  in iTCO_wdt_start()
312 	spin_unlock(&p->io_lock);  in iTCO_wdt_start()
321 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_stop()  local
324 	spin_lock(&p->io_lock);  in iTCO_wdt_stop()
326 	iTCO_vendor_pre_stop(p->smi_res);  in iTCO_wdt_stop()
329 	val = inw(TCO1_CNT(p));  in iTCO_wdt_stop()
331 	outw(val, TCO1_CNT(p));  in iTCO_wdt_stop()
332 	val = inw(TCO1_CNT(p));  in iTCO_wdt_stop()
335 	p->update_no_reboot_bit(p->no_reboot_priv, true);  in iTCO_wdt_stop()
337 	spin_unlock(&p->io_lock);  in iTCO_wdt_stop()
346 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_ping()  local
348 	spin_lock(&p->io_lock);  in iTCO_wdt_ping()
351 	if (p->iTCO_version >= 2) {  in iTCO_wdt_ping()
352 		outw(0x01, TCO_RLD(p));  in iTCO_wdt_ping()
353 	} else if (p->iTCO_version == 1) {  in iTCO_wdt_ping()
356 		outw(0x0008, TCO1_STS(p));	/* write 1 to clear bit */  in iTCO_wdt_ping()
358 		outb(0x01, TCO_RLD(p));  in iTCO_wdt_ping()
361 	spin_unlock(&p->io_lock);  in iTCO_wdt_ping()
367 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_set_timeout()  local
372 	tmrval = seconds_to_ticks(p, t);  in iTCO_wdt_set_timeout()
375 	if (p->iTCO_version == 1)  in iTCO_wdt_set_timeout()
382 	if ((p->iTCO_version >= 2 && tmrval > 0x3ff) ||  in iTCO_wdt_set_timeout()
383 	    (p->iTCO_version == 1 && tmrval > 0x03f))  in iTCO_wdt_set_timeout()
387 	if (p->iTCO_version >= 2) {  in iTCO_wdt_set_timeout()
388 		spin_lock(&p->io_lock);  in iTCO_wdt_set_timeout()
389 		val16 = inw(TCOv2_TMR(p));  in iTCO_wdt_set_timeout()
392 		outw(val16, TCOv2_TMR(p));  in iTCO_wdt_set_timeout()
393 		val16 = inw(TCOv2_TMR(p));  in iTCO_wdt_set_timeout()
394 		spin_unlock(&p->io_lock);  in iTCO_wdt_set_timeout()
398 	} else if (p->iTCO_version == 1) {  in iTCO_wdt_set_timeout()
399 		spin_lock(&p->io_lock);  in iTCO_wdt_set_timeout()
400 		val8 = inb(TCOv1_TMR(p));  in iTCO_wdt_set_timeout()
403 		outb(val8, TCOv1_TMR(p));  in iTCO_wdt_set_timeout()
404 		val8 = inb(TCOv1_TMR(p));  in iTCO_wdt_set_timeout()
405 		spin_unlock(&p->io_lock);  in iTCO_wdt_set_timeout()
417 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_get_timeleft()  local
423 	if (p->iTCO_version >= 2) {  in iTCO_wdt_get_timeleft()
424 		spin_lock(&p->io_lock);  in iTCO_wdt_get_timeleft()
425 		val16 = inw(TCO_RLD(p));  in iTCO_wdt_get_timeleft()
427 		spin_unlock(&p->io_lock);  in iTCO_wdt_get_timeleft()
429 		time_left = ticks_to_seconds(p, val16);  in iTCO_wdt_get_timeleft()
430 	} else if (p->iTCO_version == 1) {  in iTCO_wdt_get_timeleft()
431 		spin_lock(&p->io_lock);  in iTCO_wdt_get_timeleft()
432 		val8 = inb(TCO_RLD(p));  in iTCO_wdt_get_timeleft()
434 		if (!(inw(TCO1_STS(p)) & 0x0008))  in iTCO_wdt_get_timeleft()
435 			val8 += (inb(TCOv1_TMR(p)) & 0x3f);  in iTCO_wdt_get_timeleft()
436 		spin_unlock(&p->io_lock);  in iTCO_wdt_get_timeleft()
438 		time_left = ticks_to_seconds(p, val8);  in iTCO_wdt_get_timeleft()
444 static bool iTCO_wdt_set_running(struct iTCO_wdt_private *p)  in iTCO_wdt_set_running()  argument
449 	val = inw(TCO1_CNT(p));  in iTCO_wdt_set_running()
451 		set_bit(WDOG_HW_RUNNING, &p->wddev.status);  in iTCO_wdt_set_running()
485 	struct iTCO_wdt_private *p;  in iTCO_wdt_probe()  local
492 	p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);  in iTCO_wdt_probe()
493 	if (!p)  in iTCO_wdt_probe()
496 	spin_lock_init(&p->io_lock);  in iTCO_wdt_probe()
498 	p->tco_res = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_IO_TCO);  in iTCO_wdt_probe()
499 	if (!p->tco_res)  in iTCO_wdt_probe()
502 	p->iTCO_version = pdata->version;  in iTCO_wdt_probe()
503 	p->pci_dev = to_pci_dev(dev->parent);  in iTCO_wdt_probe()
505 	p->smi_res = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_IO_SMI);  in iTCO_wdt_probe()
506 	if (p->smi_res) {  in iTCO_wdt_probe()
508 		if (!devm_request_region(dev, p->smi_res->start,  in iTCO_wdt_probe()
509 					 resource_size(p->smi_res),  in iTCO_wdt_probe()
512 			       (u64)SMI_EN(p));  in iTCO_wdt_probe()
516 		   turn_SMI_watchdog_clear_off >= p->iTCO_version) {  in iTCO_wdt_probe()
521 	iTCO_wdt_no_reboot_bit_setup(p, pdev, pdata);  in iTCO_wdt_probe()
527 	if (p->iTCO_version >= 2 && p->iTCO_version < 6 &&  in iTCO_wdt_probe()
529 		p->gcs_pmc = devm_platform_ioremap_resource(pdev, ICH_RES_MEM_GCS_PMC);  in iTCO_wdt_probe()
530 		if (IS_ERR(p->gcs_pmc))  in iTCO_wdt_probe()
531 			return PTR_ERR(p->gcs_pmc);  in iTCO_wdt_probe()
535 	if (p->update_no_reboot_bit(p->no_reboot_priv, false) &&  in iTCO_wdt_probe()
541 	if (turn_SMI_watchdog_clear_off >= p->iTCO_version) {  in iTCO_wdt_probe()
546 		val32 = inl(SMI_EN(p));  in iTCO_wdt_probe()
548 		outl(val32, SMI_EN(p));  in iTCO_wdt_probe()
551 	if (!devm_request_region(dev, p->tco_res->start,  in iTCO_wdt_probe()
552 				 resource_size(p->tco_res),  in iTCO_wdt_probe()
555 		       (u64)TCOBASE(p));  in iTCO_wdt_probe()
560 		pdata->name, pdata->version, (u64)TCOBASE(p));  in iTCO_wdt_probe()
563 	switch (p->iTCO_version) {  in iTCO_wdt_probe()
567 		outw(0x0008, TCO1_STS(p)); /* Clear the Time Out Status bit */  in iTCO_wdt_probe()
568 		outw(0x0002, TCO2_STS(p)); /* Clear SECOND_TO_STS bit */  in iTCO_wdt_probe()
571 		outl(0x20008, TCO1_STS(p));  in iTCO_wdt_probe()
576 		outw(0x0008, TCO1_STS(p)); /* Clear the Time Out Status bit */  in iTCO_wdt_probe()
577 		outw(0x0002, TCO2_STS(p)); /* Clear SECOND_TO_STS bit */  in iTCO_wdt_probe()
578 		outw(0x0004, TCO2_STS(p)); /* Clear BOOT_STS bit */  in iTCO_wdt_probe()
582 	ident.firmware_version = p->iTCO_version;  in iTCO_wdt_probe()
583 	p->wddev.info = &ident;  in iTCO_wdt_probe()
584 	p->wddev.ops = &iTCO_wdt_ops;  in iTCO_wdt_probe()
585 	p->wddev.bootstatus = 0;  in iTCO_wdt_probe()
586 	p->wddev.timeout = WATCHDOG_TIMEOUT;  in iTCO_wdt_probe()
587 	watchdog_set_nowayout(&p->wddev, nowayout);  in iTCO_wdt_probe()
588 	p->wddev.parent = dev;  in iTCO_wdt_probe()
590 	watchdog_set_drvdata(&p->wddev, p);  in iTCO_wdt_probe()
591 	platform_set_drvdata(pdev, p);  in iTCO_wdt_probe()
593 	if (!iTCO_wdt_set_running(p)) {  in iTCO_wdt_probe()
598 		p->update_no_reboot_bit(p->no_reboot_priv, true);  in iTCO_wdt_probe()
603 	if (iTCO_wdt_set_timeout(&p->wddev, heartbeat)) {  in iTCO_wdt_probe()
604 		iTCO_wdt_set_timeout(&p->wddev, WATCHDOG_TIMEOUT);  in iTCO_wdt_probe()
609 	watchdog_stop_on_reboot(&p->wddev);  in iTCO_wdt_probe()
610 	watchdog_stop_on_unregister(&p->wddev);  in iTCO_wdt_probe()
611 	ret = devm_watchdog_register_device(dev, &p->wddev);  in iTCO_wdt_probe()
638 	struct iTCO_wdt_private *p = dev_get_drvdata(dev);  in iTCO_wdt_suspend_noirq()  local
641 	p->suspended = false;  in iTCO_wdt_suspend_noirq()
642 	if (watchdog_active(&p->wddev) && need_suspend()) {  in iTCO_wdt_suspend_noirq()
643 		ret = iTCO_wdt_stop(&p->wddev);  in iTCO_wdt_suspend_noirq()
645 			p->suspended = true;  in iTCO_wdt_suspend_noirq()
652 	struct iTCO_wdt_private *p = dev_get_drvdata(dev);  in iTCO_wdt_resume_noirq()  local
654 	if (p->suspended)  in iTCO_wdt_resume_noirq()
655 		iTCO_wdt_start(&p->wddev);  in iTCO_wdt_resume_noirq()