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
107 	int (*update_no_reboot_bit)(void *p, bool set);
138 static inline unsigned int seconds_to_ticks(struct iTCO_wdt_private *p,  in seconds_to_ticks()  argument
141 	return p->iTCO_version == 3 ? secs : (secs * 10) / 6;  in seconds_to_ticks()
144 static inline unsigned int ticks_to_seconds(struct iTCO_wdt_private *p,  in ticks_to_seconds()  argument
147 	return p->iTCO_version == 3 ? ticks : (ticks * 6) / 10;  in ticks_to_seconds()
150 static inline u32 no_reboot_bit(struct iTCO_wdt_private *p)  in no_reboot_bit()  argument
154 	switch (p->iTCO_version) {  in no_reboot_bit()
179 	struct iTCO_wdt_private *p = priv;  in update_no_reboot_bit_pci()  local
182 	pci_read_config_dword(p->pci_dev, 0xd4, &val32);  in update_no_reboot_bit_pci()
184 		val32 |= no_reboot_bit(p);  in update_no_reboot_bit_pci()
186 		val32 &= ~no_reboot_bit(p);  in update_no_reboot_bit_pci()
187 	pci_write_config_dword(p->pci_dev, 0xd4, val32);  in update_no_reboot_bit_pci()
188 	pci_read_config_dword(p->pci_dev, 0xd4, &newval32);  in update_no_reboot_bit_pci()
199 	struct iTCO_wdt_private *p = priv;  in update_no_reboot_bit_mem()  local
202 	val32 = readl(p->gcs_pmc);  in update_no_reboot_bit_mem()
204 		val32 |= no_reboot_bit(p);  in update_no_reboot_bit_mem()
206 		val32 &= ~no_reboot_bit(p);  in update_no_reboot_bit_mem()
207 	writel(val32, p->gcs_pmc);  in update_no_reboot_bit_mem()
208 	newval32 = readl(p->gcs_pmc);  in update_no_reboot_bit_mem()
219 	struct iTCO_wdt_private *p = priv;  in update_no_reboot_bit_cnt()  local
222 	val = inw(TCO1_CNT(p));  in update_no_reboot_bit_cnt()
227 	outw(val, TCO1_CNT(p));  in update_no_reboot_bit_cnt()
228 	newval = inw(TCO1_CNT(p));  in update_no_reboot_bit_cnt()
243 static void iTCO_wdt_no_reboot_bit_setup(struct iTCO_wdt_private *p,  in iTCO_wdt_no_reboot_bit_setup()  argument
250 		p->update_no_reboot_bit = update_no_reboot_bit_pmc;  in iTCO_wdt_no_reboot_bit_setup()
251 		p->no_reboot_priv = pmc;  in iTCO_wdt_no_reboot_bit_setup()
255 	if (p->iTCO_version >= 6)  in iTCO_wdt_no_reboot_bit_setup()
256 		p->update_no_reboot_bit = update_no_reboot_bit_cnt;  in iTCO_wdt_no_reboot_bit_setup()
257 	else if (p->iTCO_version >= 2)  in iTCO_wdt_no_reboot_bit_setup()
258 		p->update_no_reboot_bit = update_no_reboot_bit_mem;  in iTCO_wdt_no_reboot_bit_setup()
259 	else if (p->iTCO_version == 1)  in iTCO_wdt_no_reboot_bit_setup()
260 		p->update_no_reboot_bit = update_no_reboot_bit_pci;  in iTCO_wdt_no_reboot_bit_setup()
262 		p->update_no_reboot_bit = update_no_reboot_bit_def;  in iTCO_wdt_no_reboot_bit_setup()
264 	p->no_reboot_priv = p;  in iTCO_wdt_no_reboot_bit_setup()
269 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_start()  local
272 	spin_lock(&p->io_lock);  in iTCO_wdt_start()
274 	iTCO_vendor_pre_start(p->smi_res, wd_dev->timeout);  in iTCO_wdt_start()
277 	if (p->update_no_reboot_bit(p->no_reboot_priv, false)) {  in iTCO_wdt_start()
278 		spin_unlock(&p->io_lock);  in iTCO_wdt_start()
285 	if (p->iTCO_version >= 2)  in iTCO_wdt_start()
286 		outw(0x01, TCO_RLD(p));  in iTCO_wdt_start()
287 	else if (p->iTCO_version == 1)  in iTCO_wdt_start()
288 		outb(0x01, TCO_RLD(p));  in iTCO_wdt_start()
291 	val = inw(TCO1_CNT(p));  in iTCO_wdt_start()
293 	outw(val, TCO1_CNT(p));  in iTCO_wdt_start()
294 	val = inw(TCO1_CNT(p));  in iTCO_wdt_start()
295 	spin_unlock(&p->io_lock);  in iTCO_wdt_start()
304 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_stop()  local
307 	spin_lock(&p->io_lock);  in iTCO_wdt_stop()
309 	iTCO_vendor_pre_stop(p->smi_res);  in iTCO_wdt_stop()
312 	val = inw(TCO1_CNT(p));  in iTCO_wdt_stop()
314 	outw(val, TCO1_CNT(p));  in iTCO_wdt_stop()
315 	val = inw(TCO1_CNT(p));  in iTCO_wdt_stop()
318 	p->update_no_reboot_bit(p->no_reboot_priv, true);  in iTCO_wdt_stop()
320 	spin_unlock(&p->io_lock);  in iTCO_wdt_stop()
329 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_ping()  local
331 	spin_lock(&p->io_lock);  in iTCO_wdt_ping()
334 	if (p->iTCO_version >= 2) {  in iTCO_wdt_ping()
335 		outw(0x01, TCO_RLD(p));  in iTCO_wdt_ping()
336 	} else if (p->iTCO_version == 1) {  in iTCO_wdt_ping()
339 		outw(0x0008, TCO1_STS(p));	/* write 1 to clear bit */  in iTCO_wdt_ping()
341 		outb(0x01, TCO_RLD(p));  in iTCO_wdt_ping()
344 	spin_unlock(&p->io_lock);  in iTCO_wdt_ping()
350 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_set_timeout()  local
355 	tmrval = seconds_to_ticks(p, t);  in iTCO_wdt_set_timeout()
358 	if (p->iTCO_version == 1)  in iTCO_wdt_set_timeout()
365 	if ((p->iTCO_version >= 2 && tmrval > 0x3ff) ||  in iTCO_wdt_set_timeout()
366 	    (p->iTCO_version == 1 && tmrval > 0x03f))  in iTCO_wdt_set_timeout()
370 	if (p->iTCO_version >= 2) {  in iTCO_wdt_set_timeout()
371 		spin_lock(&p->io_lock);  in iTCO_wdt_set_timeout()
372 		val16 = inw(TCOv2_TMR(p));  in iTCO_wdt_set_timeout()
375 		outw(val16, TCOv2_TMR(p));  in iTCO_wdt_set_timeout()
376 		val16 = inw(TCOv2_TMR(p));  in iTCO_wdt_set_timeout()
377 		spin_unlock(&p->io_lock);  in iTCO_wdt_set_timeout()
381 	} else if (p->iTCO_version == 1) {  in iTCO_wdt_set_timeout()
382 		spin_lock(&p->io_lock);  in iTCO_wdt_set_timeout()
383 		val8 = inb(TCOv1_TMR(p));  in iTCO_wdt_set_timeout()
386 		outb(val8, TCOv1_TMR(p));  in iTCO_wdt_set_timeout()
387 		val8 = inb(TCOv1_TMR(p));  in iTCO_wdt_set_timeout()
388 		spin_unlock(&p->io_lock);  in iTCO_wdt_set_timeout()
400 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);  in iTCO_wdt_get_timeleft()  local
406 	if (p->iTCO_version >= 2) {  in iTCO_wdt_get_timeleft()
407 		spin_lock(&p->io_lock);  in iTCO_wdt_get_timeleft()
408 		val16 = inw(TCO_RLD(p));  in iTCO_wdt_get_timeleft()
410 		spin_unlock(&p->io_lock);  in iTCO_wdt_get_timeleft()
412 		time_left = ticks_to_seconds(p, val16);  in iTCO_wdt_get_timeleft()
413 	} else if (p->iTCO_version == 1) {  in iTCO_wdt_get_timeleft()
414 		spin_lock(&p->io_lock);  in iTCO_wdt_get_timeleft()
415 		val8 = inb(TCO_RLD(p));  in iTCO_wdt_get_timeleft()
417 		if (!(inw(TCO1_STS(p)) & 0x0008))  in iTCO_wdt_get_timeleft()
418 			val8 += (inb(TCOv1_TMR(p)) & 0x3f);  in iTCO_wdt_get_timeleft()
419 		spin_unlock(&p->io_lock);  in iTCO_wdt_get_timeleft()
421 		time_left = ticks_to_seconds(p, val8);  in iTCO_wdt_get_timeleft()
427 static bool iTCO_wdt_set_running(struct iTCO_wdt_private *p)  in iTCO_wdt_set_running()  argument
432 	val = inw(TCO1_CNT(p));  in iTCO_wdt_set_running()
434 		set_bit(WDOG_HW_RUNNING, &p->wddev.status);  in iTCO_wdt_set_running()
468 	struct iTCO_wdt_private *p;  in iTCO_wdt_probe()  local
475 	p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);  in iTCO_wdt_probe()
476 	if (!p)  in iTCO_wdt_probe()
479 	spin_lock_init(&p->io_lock);  in iTCO_wdt_probe()
481 	p->tco_res = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_IO_TCO);  in iTCO_wdt_probe()
482 	if (!p->tco_res)  in iTCO_wdt_probe()
485 	p->iTCO_version = pdata->version;  in iTCO_wdt_probe()
486 	p->pci_dev = to_pci_dev(dev->parent);  in iTCO_wdt_probe()
488 	p->smi_res = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_IO_SMI);  in iTCO_wdt_probe()
489 	if (p->smi_res) {  in iTCO_wdt_probe()
491 		if (!devm_request_region(dev, p->smi_res->start,  in iTCO_wdt_probe()
492 					 resource_size(p->smi_res),  in iTCO_wdt_probe()
495 			       (u64)SMI_EN(p));  in iTCO_wdt_probe()
499 		   turn_SMI_watchdog_clear_off >= p->iTCO_version) {  in iTCO_wdt_probe()
504 	iTCO_wdt_no_reboot_bit_setup(p, pdev, pdata);  in iTCO_wdt_probe()
510 	if (p->iTCO_version >= 2 && p->iTCO_version < 6 &&  in iTCO_wdt_probe()
512 		p->gcs_pmc = devm_platform_ioremap_resource(pdev, ICH_RES_MEM_GCS_PMC);  in iTCO_wdt_probe()
513 		if (IS_ERR(p->gcs_pmc))  in iTCO_wdt_probe()
514 			return PTR_ERR(p->gcs_pmc);  in iTCO_wdt_probe()
518 	if (p->update_no_reboot_bit(p->no_reboot_priv, false) &&  in iTCO_wdt_probe()
524 	if (turn_SMI_watchdog_clear_off >= p->iTCO_version) {  in iTCO_wdt_probe()
529 		val32 = inl(SMI_EN(p));  in iTCO_wdt_probe()
531 		outl(val32, SMI_EN(p));  in iTCO_wdt_probe()
534 	if (!devm_request_region(dev, p->tco_res->start,  in iTCO_wdt_probe()
535 				 resource_size(p->tco_res),  in iTCO_wdt_probe()
538 		       (u64)TCOBASE(p));  in iTCO_wdt_probe()
543 		pdata->name, pdata->version, (u64)TCOBASE(p));  in iTCO_wdt_probe()
546 	switch (p->iTCO_version) {  in iTCO_wdt_probe()
550 		outw(0x0008, TCO1_STS(p)); /* Clear the Time Out Status bit */  in iTCO_wdt_probe()
551 		outw(0x0002, TCO2_STS(p)); /* Clear SECOND_TO_STS bit */  in iTCO_wdt_probe()
554 		outl(0x20008, TCO1_STS(p));  in iTCO_wdt_probe()
559 		outw(0x0008, TCO1_STS(p)); /* Clear the Time Out Status bit */  in iTCO_wdt_probe()
560 		outw(0x0002, TCO2_STS(p)); /* Clear SECOND_TO_STS bit */  in iTCO_wdt_probe()
561 		outw(0x0004, TCO2_STS(p)); /* Clear BOOT_STS bit */  in iTCO_wdt_probe()
565 	ident.firmware_version = p->iTCO_version;  in iTCO_wdt_probe()
566 	p->wddev.info = &ident,  in iTCO_wdt_probe()
567 	p->wddev.ops = &iTCO_wdt_ops,  in iTCO_wdt_probe()
568 	p->wddev.bootstatus = 0;  in iTCO_wdt_probe()
569 	p->wddev.timeout = WATCHDOG_TIMEOUT;  in iTCO_wdt_probe()
570 	watchdog_set_nowayout(&p->wddev, nowayout);  in iTCO_wdt_probe()
571 	p->wddev.parent = dev;  in iTCO_wdt_probe()
573 	watchdog_set_drvdata(&p->wddev, p);  in iTCO_wdt_probe()
574 	platform_set_drvdata(pdev, p);  in iTCO_wdt_probe()
576 	if (!iTCO_wdt_set_running(p)) {  in iTCO_wdt_probe()
581 		p->update_no_reboot_bit(p->no_reboot_priv, true);  in iTCO_wdt_probe()
586 	if (iTCO_wdt_set_timeout(&p->wddev, heartbeat)) {  in iTCO_wdt_probe()
587 		iTCO_wdt_set_timeout(&p->wddev, WATCHDOG_TIMEOUT);  in iTCO_wdt_probe()
592 	watchdog_stop_on_reboot(&p->wddev);  in iTCO_wdt_probe()
593 	watchdog_stop_on_unregister(&p->wddev);  in iTCO_wdt_probe()
594 	ret = devm_watchdog_register_device(dev, &p->wddev);  in iTCO_wdt_probe()
623 	struct iTCO_wdt_private *p = dev_get_drvdata(dev);  in iTCO_wdt_suspend_noirq()  local
626 	p->suspended = false;  in iTCO_wdt_suspend_noirq()
627 	if (watchdog_active(&p->wddev) && need_suspend()) {  in iTCO_wdt_suspend_noirq()
628 		ret = iTCO_wdt_stop(&p->wddev);  in iTCO_wdt_suspend_noirq()
630 			p->suspended = true;  in iTCO_wdt_suspend_noirq()
637 	struct iTCO_wdt_private *p = dev_get_drvdata(dev);  in iTCO_wdt_resume_noirq()  local
639 	if (p->suspended)  in iTCO_wdt_resume_noirq()
640 		iTCO_wdt_start(&p->wddev);  in iTCO_wdt_resume_noirq()