1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
78 #define	WB_LDN8_CRF5_KEYB_P20	0x04	/* 1: keyb P20 forces timeout */
79 #define	WB_LDN8_CRF5_KBRST	0x02	/* 1: timeout causes pin60 kbd reset */
81 /* CRF6: Watchdog Timeout (0 == off). Mapped to reg_timeout. */
88 #define	WB_LDN8_CRF7_FORCE	0x20	/* 1: force timeout (self-clear) */
108 	 * timeout as set by watchdog(4) but still use that API to
109 	 * re-load it periodically.
115 	 * We want to know the timeout value and usually need two
187 		.descr		= "Winbond 83627DHG-P",
192 		.descr		= "Winbond 83667HG-B",
238  * usually not give the current timeout or state on whether the watchdog
253 	sbuf_printf(&sb, "CR%02X 0x%02x ", sc->ctl_reg, sc->reg_1);  in sysctl_wb_debug()
254 	sbuf_printf(&sb, "CR%02X 0x%02x ", sc->time_reg, sc->reg_timeout);  in sysctl_wb_debug()
255 	sbuf_printf(&sb, "CR%02X 0x%02x", sc->csr_reg, sc->reg_2);  in sysctl_wb_debug()
274 	sc->reg_1 = superio_read(sc->dev, sc->ctl_reg);  in sysctl_wb_debug_current()
275 	sc->reg_timeout = superio_read(sc->dev, sc->time_reg);  in sysctl_wb_debug_current()
276 	sc->reg_2 = superio_read(sc->dev, sc->csr_reg);  in sysctl_wb_debug_current()
282  * Sysctl handlers to force a watchdog timeout or to test the NMI functionality
286  * timeout but clear the flag for the sysctl again.  This is interesting given a
287  * lot of boards have jumpers to change the action on watchdog timeout or
289  * XXX-BZ notyet: currently no general infrastructure exists to do this.
300 	val = sc->test_nmi;  in sysctl_wb_force_test_nmi()
305         if (error || !req->newptr)  in sysctl_wb_force_test_nmi()
313 		sc->test_nmi = 0;  in sysctl_wb_force_test_nmi()
319 	 * forcing the timeout.  in sysctl_wb_force_test_nmi()
322 		sc->test_nmi = 1;  in sysctl_wb_force_test_nmi()
326 	sc->reg_2 = superio_read(sc->dev, sc->csr_reg);  in sysctl_wb_force_test_nmi()
327 	sc->reg_2 |= WB_LDN8_CRF7_FORCE;  in sysctl_wb_force_test_nmi()
328 	superio_write(sc->dev, sc->csr_reg, sc->reg_2);  in sysctl_wb_force_test_nmi()
343 	device_printf(sc->dev, "%s%sWatchdog %sabled. %s"  in wb_print_state()
347 	    (sc->reg_timeout > 0x00) ? "en" : "dis",  in wb_print_state()
348 	    (sc->reg_2 & WB_LDN8_CRF7_TS) ? "Watchdog fired. " : "",  in wb_print_state()
349 	    (sc->reg_1 & WB_LDN8_CRF5_SCALE) ? 60 : 1,  in wb_print_state()
350 	    sc->reg_timeout,  in wb_print_state()
351 	    (sc->reg_timeout > 0x00) ? "<" : "",  in wb_print_state()
352 	    sc->reg_timeout * ((sc->reg_1 & WB_LDN8_CRF5_SCALE) ? 60 : 1),  in wb_print_state()
353 	    (sc->reg_timeout > 0x00) ? " left" : "",  in wb_print_state()
354 	    sc->ctl_reg, sc->reg_1, sc->csr_reg, sc->reg_2);  in wb_print_state()
358  * (Re)load the watchdog counter depending on timeout.  A timeout of 0 will
362 wb_set_watchdog(struct wb_softc *sc, unsigned int timeout)  in wb_set_watchdog()  argument
365 	if (timeout != 0) {  in wb_set_watchdog()
370 		if (sc->timeout_override > 0)  in wb_set_watchdog()
371 			timeout = sc->timeout_override;  in wb_set_watchdog()
373 		/* Make sure we support the requested timeout. */  in wb_set_watchdog()
374 		if (timeout > 255 * 60)  in wb_set_watchdog()
378 	if (sc->debug_verbose)  in wb_set_watchdog()
381 	if (timeout == 0) {  in wb_set_watchdog()
383 		sc->reg_timeout = 0;  in wb_set_watchdog()
384 		superio_write(sc->dev, sc->time_reg, sc->reg_timeout);  in wb_set_watchdog()
388 		sc->reg_1 = superio_read(sc->dev, sc->ctl_reg);  in wb_set_watchdog()
390 		if (timeout > 255) {  in wb_set_watchdog()
392 			sc->reg_1 |= WB_LDN8_CRF5_SCALE;  in wb_set_watchdog()
393 			sc->reg_timeout = (timeout / 60);  in wb_set_watchdog()
394 			if (timeout % 60)  in wb_set_watchdog()
395 				sc->reg_timeout++;  in wb_set_watchdog()
398 			sc->reg_1 &= ~WB_LDN8_CRF5_SCALE;  in wb_set_watchdog()
399 			sc->reg_timeout = timeout;  in wb_set_watchdog()
403 		sc->reg_2 = superio_read(sc->dev, sc->csr_reg);  in wb_set_watchdog()
404 		if (sc->reg_2 & WB_LDN8_CRF7_TS) {  in wb_set_watchdog()
405 			sc->reg_2 &= ~WB_LDN8_CRF7_TS;  in wb_set_watchdog()
406 			superio_write(sc->dev, sc->csr_reg, sc->reg_2);  in wb_set_watchdog()
410 		superio_write(sc->dev, sc->ctl_reg, sc->reg_1);  in wb_set_watchdog()
412 		/* Set timer and arm/reset the watchdog. */  in wb_set_watchdog()
413 		superio_write(sc->dev, sc->time_reg, sc->reg_timeout);  in wb_set_watchdog()
416 	if (sc->debug_verbose)  in wb_set_watchdog()
423  * with the given timeout or disable the watchdog.
429 	unsigned int timeout;  in wb_watchdog_fn()  local
438 		/* Reset (and arm) watchdog. */  in wb_watchdog_fn()
439 		timeout = ((uint64_t)1 << cmd) / 1000000000;  in wb_watchdog_fn()
440 		if (timeout == 0)  in wb_watchdog_fn()
441 			timeout = 1;  in wb_watchdog_fn()
442 		e = wb_set_watchdog(sc, timeout);  in wb_watchdog_fn()
447 			/* On error, try to make sure the WD is disabled. */  in wb_watchdog_fn()
479 			sc->chip = wb_devs[j].chip;  in wb_probe()
500 	unsigned long timeout;  in wb_attach()  local
504 	sc->dev = dev;  in wb_attach()
509 	switch (sc->chip) {  in wb_attach()
512 		sc->ctl_reg = 0xf3;  in wb_attach()
513 		sc->time_reg = 0xf4;  in wb_attach()
514 		sc->csr_reg = 0xf7;  in wb_attach()
517 		sc->ctl_reg = 0xf0;  in wb_attach()
518 		sc->time_reg = 0xf1;  in wb_attach()
519 		sc->csr_reg = 0xf2;  in wb_attach()
522 		sc->ctl_reg = 0xf5;  in wb_attach()
523 		sc->time_reg = 0xf6;  in wb_attach()
524 		sc->csr_reg = 0xf7;  in wb_attach()
528 	switch (sc->chip) {  in wb_attach()
551 		t = superio_read(dev, 0x2D) & ~0x01; /* PIN77 -> WDT0# */  in wb_attach()
553 		t = superio_read(dev, sc->ctl_reg);  in wb_attach()
556 		superio_write(dev, sc->ctl_reg, t);  in wb_attach()
561 		t = superio_read(dev, 0x2C) & ~0x80; /* PIN47 -> WDT0# */  in wb_attach()
582 		t = superio_read(dev, sc->ctl_reg);  in wb_attach()
585 		superio_write(dev, sc->ctl_reg, t);  in wb_attach()
592 	sc->reg_1 = superio_read(dev, sc->ctl_reg);  in wb_attach()
593 	sc->reg_timeout = superio_read(dev, sc->time_reg);  in wb_attach()
594 	sc->reg_2 = superio_read(dev, sc->csr_reg);  in wb_attach()
597 	if (bootverbose || (sc->reg_timeout > 0x00))  in wb_attach()
600 	sc->reg_1 &= ~WB_LDN8_CRF5_KEYB_P20;  in wb_attach()
601 	sc->reg_1 |= WB_LDN8_CRF5_KBRST;  in wb_attach()
602 	superio_write(dev, sc->ctl_reg, sc->reg_1);  in wb_attach()
605 	 * Clear a previous watchdog timeout event (if still set).  in wb_attach()
606 	 * Disable timer reset on mouse interrupts.  Leave reset on keyboard,  in wb_attach()
609 	sc->reg_2 &= ~(WB_LDN8_CRF7_MOUSE|WB_LDN8_CRF7_TS);  in wb_attach()
610 	superio_write(dev, sc->csr_reg, sc->reg_2);  in wb_attach()
612 	/* Read global timeout override tunable, Add per device sysctls. */  in wb_attach()
613 	if (TUNABLE_ULONG_FETCH("hw.wbwd.timeout_override", &timeout)) {  in wb_attach()
614 		if (timeout > 0)  in wb_attach()
615 			sc->timeout_override = timeout;  in wb_attach()
620 	    "timeout_override", CTLFLAG_RW, &sc->timeout_override, 0,  in wb_attach()
621             "Timeout in seconds overriding default watchdog timeout");  in wb_attach()
623 	    "debug_verbose", CTLFLAG_RW, &sc->debug_verbose, 0,  in wb_attach()
638 	sc->ev_tag = EVENTHANDLER_REGISTER(watchdog_list, wb_watchdog_fn, sc,  in wb_attach()
655 	if (sc->ev_tag)  in wb_detach()
656 		EVENTHANDLER_DEREGISTER(watchdog_list, sc->ev_tag);  in wb_detach()