1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
45  * There is one slight problem on non-ACPI or ACPI 1.x systems: we have no
52  * For details about the ICH WDT, see Intel Application Note AP-725
53  * (document no. 292273-001).  The WDT is also described in the individual
55  * (document no. 252516-001) sections 9.10 and 9.11.
58  * SoC PMC support by Denir Li <denir.li@cas-well.com>
106 	{ DEVICEID_ICH8ME,   "Intel ICH8M-E watchdog timer",	8, 2 },
112 	{ DEVICEID_ICH9ME,   "Intel ICH9M-E watchdog timer",	9, 2 },
268 	{ DEVICEID_LPT_LP0,  "Intel Lynx Point-LP watchdog timer",	10, 2 },
269 	{ DEVICEID_LPT_LP1,  "Intel Lynx Point-LP watchdog timer",	10, 2 },
270 	{ DEVICEID_LPT_LP2,  "Intel Lynx Point-LP watchdog timer",	10, 2 },
271 	{ DEVICEID_LPT_LP3,  "Intel Lynx Point-LP watchdog timer",	10, 2 },
272 	{ DEVICEID_LPT_LP4,  "Intel Lynx Point-LP watchdog timer",	10, 2 },
273 	{ DEVICEID_LPT_LP5,  "Intel Lynx Point-LP watchdog timer",	10, 2 },
274 	{ DEVICEID_LPT_LP6,  "Intel Lynx Point-LP watchdog timer",	10, 2 },
275 	{ DEVICEID_LPT_LP7,  "Intel Lynx Point-LP watchdog timer",	10, 2 },
276 	{ DEVICEID_WCPT_LP1, "Intel Wildcat Point-LP watchdog timer",	10, 2 },
277 	{ DEVICEID_WCPT_LP2, "Intel Wildcat Point-LP watchdog timer",	10, 2 },
278 	{ DEVICEID_WCPT_LP3, "Intel Wildcat Point-LP watchdog timer",	10, 2 },
279 	{ DEVICEID_WCPT_LP5, "Intel Wildcat Point-LP watchdog timer",	10, 2 },
280 	{ DEVICEID_WCPT_LP6, "Intel Wildcat Point-LP watchdog timer",	10, 2 },
281 	{ DEVICEID_WCPT_LP7, "Intel Wildcat Point-LP watchdog timer",	10, 2 },
282 	{ DEVICEID_WCPT_LP9, "Intel Wildcat Point-LP watchdog timer",	10, 2 },
299 	{ DEVICEID_SRPTLP_SMB,    "Sunrise Point-LP watchdog timer",	10, 4 },
305 	bus_read_1((sc)->tco_res, (off))
307 	bus_read_2((sc)->tco_res, (off))
309 	bus_read_4((sc)->tco_res, (off))
311 	bus_read_4((sc)->smi_res, (off))
313 	bus_read_4((sc)->gcs_res, (off))
316 	bus_read_4((sc)->gcs_res, (off))
318 	bus_read_4((sc)->gc_res, (off))
321 	bus_write_1((sc)->tco_res, (off), (val))
323 	bus_write_2((sc)->tco_res, (off), (val))
325 	bus_write_4((sc)->tco_res, (off), (val))
327 	bus_write_4((sc)->smi_res, (off), (val))
329 	bus_write_4((sc)->gcs_res, (off), (val))
332 	bus_write_4((sc)->gcs_res, (off), (val))
334 	bus_write_4((sc)->gc_res, (off), (val))
343  * Disable the watchdog timeout SMI handler.
345  * Apparently, some BIOSes install handlers that reset or disable the
346  * watchdog timer instead of resetting the system, so we disable the SMI
357  * Enable the watchdog timeout SMI handler.  See above for details.
391 	if (sc->tco_version < 4)  in ichwd_sts_reset()
408 	sc->active = 1;  in ichwd_tmr_enable()
409 	ichwd_verbose_printf(sc->device, "timer enabled\n");  in ichwd_tmr_enable()
413  * Disable the watchdog timer.  See above for details.
422 	sc->active = 0;  in ichwd_tmr_disable()
423 	ichwd_verbose_printf(sc->device, "timer disabled\n");  in ichwd_tmr_disable()
434 	if (sc->tco_version == 1)  in ichwd_tmr_reload()
441  * Set the initial timeout value.  Note that this must always be followed
445 ichwd_tmr_set(struct ichwd_softc *sc, unsigned int timeout)  in ichwd_tmr_set()  argument
448 	if (timeout < TCO_RLD_TMR_MIN)  in ichwd_tmr_set()
449 		timeout = TCO_RLD_TMR_MIN;  in ichwd_tmr_set()
451 	if (sc->tco_version == 1) {  in ichwd_tmr_set()
455 		if (timeout > TCO_RLD1_TMR_MAX)  in ichwd_tmr_set()
456 			timeout = TCO_RLD1_TMR_MAX;  in ichwd_tmr_set()
457 		tmr_val8 |= timeout;  in ichwd_tmr_set()
463 		if (timeout > TCO_RLD2_TMR_MAX)  in ichwd_tmr_set()
464 			timeout = TCO_RLD2_TMR_MAX;  in ichwd_tmr_set()
465 		tmr_val16 |= timeout;  in ichwd_tmr_set()
469 	sc->timeout = timeout;  in ichwd_tmr_set()
471 	ichwd_verbose_printf(sc->device, "timeout set to %u ticks\n", timeout);  in ichwd_tmr_set()
481 	switch (sc->tco_version) {  in ichwd_clear_noreboot()
483 		status = pci_read_config(sc->ich, ICH_GEN_STA, 1);  in ichwd_clear_noreboot()
485 		pci_write_config(sc->ich, ICH_GEN_STA, status, 1);  in ichwd_clear_noreboot()
486 		status = pci_read_config(sc->ich, ICH_GEN_STA, 1);  in ichwd_clear_noreboot()
515 		ichwd_verbose_printf(sc->device,  in ichwd_clear_noreboot()
517 		    sc->tco_version);  in ichwd_clear_noreboot()
522 		device_printf(sc->device,  in ichwd_clear_noreboot()
529  * Watchdog event handler - called by the framework to enable or disable
530  * the watchdog or change the initial timeout value.
536 	unsigned int timeout;  in ichwd_event()  local
538 	/* convert from power-of-two-ns to WDT ticks */  in ichwd_event()
541 	if (sc->tco_version == 3) {  in ichwd_event()
542 		timeout = ((uint64_t)1 << cmd) / ICHWD_TCO_V3_TICK;  in ichwd_event()
544 		timeout = ((uint64_t)1 << cmd) / ICHWD_TICK;  in ichwd_event()
548 		if (!sc->active)  in ichwd_event()
550 		if (timeout != sc->timeout)  in ichwd_event()
551 			ichwd_tmr_set(sc, timeout);  in ichwd_event()
555 		if (sc->active)  in ichwd_event()
575 	for (id = ichwd_devices; id->desc != NULL; ++id) {  in ichwd_find_ich_lpc_bridge()
576 		if (devid == id->device) {  in ichwd_find_ich_lpc_bridge()
594 	 * Check if SMBus controller provides TCO configuration.  in ichwd_find_smb_dev()
605 	for (id = ichwd_smb_devices; id->desc != NULL; ++id) {  in ichwd_find_smb_dev()
606 		if (devid == id->device) {  in ichwd_find_smb_dev()
638 	KASSERT(id_p->tco_version >= 1,  in ichwd_identify()
639 	    ("unexpected TCO version %d", id_p->tco_version));  in ichwd_identify()
640 	KASSERT(id_p->tco_version != 4 || smb != NULL,  in ichwd_identify()
641 	    ("could not find PCI SMBus device for TCOv4"));  in ichwd_identify()
642 	KASSERT(id_p->tco_version >= 4 || ich != NULL,  in ichwd_identify()
643 	    ("could not find PCI LPC bridge device for TCOv1-3"));  in ichwd_identify()
646 	if ((dev = device_find_child(parent, driver->name, 0)) == NULL)  in ichwd_identify()
647 		dev = BUS_ADD_CHILD(parent, 0, driver->name, 0);  in ichwd_identify()
652 	switch (id_p->tco_version) {  in ichwd_identify()
664 			    id_p->tco_version);  in ichwd_identify()
675 			    id_p->tco_version);  in ichwd_identify()
683 			    id_p->tco_version);  in ichwd_identify()
692 			    id_p->tco_version, rc);  in ichwd_identify()
710 		 * within the SMBus target port, ID 0xc6.  in ichwd_identify()
718 			    id_p->tco_version, rc);  in ichwd_identify()
725 		    id_p->tco_version);  in ichwd_identify()
743 	device_set_desc_copy(dev, id_p->desc);  in ichwd_probe()
761 	sc->ich_version = id_p->ich_version;  in ichwd_smb_attach()
762 	sc->tco_version = id_p->tco_version;  in ichwd_smb_attach()
765 	sc->tco_rid = 0;  in ichwd_smb_attach()
766 	sc->tco_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &sc->tco_rid,  in ichwd_smb_attach()
768 	if (sc->tco_res == NULL) {  in ichwd_smb_attach()
777 	sc->gc_rid = 1;  in ichwd_smb_attach()
778 	sc->gc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->gc_rid,  in ichwd_smb_attach()
780 	if (sc->gc_res == NULL) {  in ichwd_smb_attach()
789 		if (id_p->quirks & PMC_HIDDEN) {  in ichwd_smb_attach()
809 	sc->smi_rid = 2;  in ichwd_smb_attach()
810 	sc->smi_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->smi_rid,  in ichwd_smb_attach()
811 	    acpi_base + SMI_BASE, acpi_base + SMI_BASE + SMI_LEN - 1, SMI_LEN,  in ichwd_smb_attach()
813 	if (sc->smi_res == NULL) {  in ichwd_smb_attach()
835 	sc->ich = ich;  in ichwd_lpc_attach()
836 	sc->ich_version = id_p->ich_version;  in ichwd_lpc_attach()
837 	sc->tco_version = id_p->tco_version;  in ichwd_lpc_attach()
847 	sc->smi_rid = 0;  in ichwd_lpc_attach()
848 	sc->smi_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->smi_rid,  in ichwd_lpc_attach()
849 	    pmbase + SMI_BASE, pmbase + SMI_BASE + SMI_LEN - 1, SMI_LEN,  in ichwd_lpc_attach()
851 	if (sc->smi_res == NULL) {  in ichwd_lpc_attach()
856 	sc->tco_rid = 1;  in ichwd_lpc_attach()
857 	sc->tco_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->tco_rid,  in ichwd_lpc_attach()
858 	    pmbase + TCO_BASE, pmbase + TCO_BASE + TCO_LEN - 1, TCO_LEN,  in ichwd_lpc_attach()
860 	if (sc->tco_res == NULL) {  in ichwd_lpc_attach()
865 	sc->gcs_rid = 0;  in ichwd_lpc_attach()
866 	if (sc->tco_version >= 2) {  in ichwd_lpc_attach()
867 		sc->gcs_res = bus_alloc_resource_any(ich, SYS_RES_MEMORY,  in ichwd_lpc_attach()
868 		    &sc->gcs_rid, RF_ACTIVE|RF_SHAREABLE);  in ichwd_lpc_attach()
869 		if (sc->gcs_res == NULL) {  in ichwd_lpc_attach()
884 	sc->device = dev;  in ichwd_attach()
893 	 * Determine if we are coming up after a watchdog-induced reset.  Some  in ichwd_attach()
899 		    "resuming after hardware watchdog timeout\n");  in ichwd_attach()
908 	sc->ev_tag = EVENTHANDLER_REGISTER(watchdog_list, ichwd_event, sc, 0);  in ichwd_attach()
910 	/* disable the SMI handler */  in ichwd_attach()
911 	sc->smi_enabled = ichwd_smi_is_enabled(sc);  in ichwd_attach()
917 	if (sc->tco_res != NULL)  in ichwd_attach()
919 		    sc->tco_rid, sc->tco_res);  in ichwd_attach()
920 	if (sc->smi_res != NULL)  in ichwd_attach()
922 		    sc->smi_rid, sc->smi_res);  in ichwd_attach()
923 	if (sc->gcs_res != NULL)  in ichwd_attach()
924 		bus_release_resource(sc->ich, SYS_RES_MEMORY,  in ichwd_attach()
925 		    sc->gcs_rid, sc->gcs_res);  in ichwd_attach()
926 	if (sc->gc_res != NULL)  in ichwd_attach()
928 		    sc->gc_rid, sc->gc_res);  in ichwd_attach()
941 	if (sc->active)  in ichwd_detach()
945 	if (sc->smi_enabled != 0)  in ichwd_detach()
949 	if (sc->ev_tag != NULL)  in ichwd_detach()
950 		EVENTHANDLER_DEREGISTER(watchdog_list, sc->ev_tag);  in ichwd_detach()
951 	sc->ev_tag = NULL;  in ichwd_detach()
957 	bus_release_resource(dev, SYS_RES_IOPORT, sc->tco_rid, sc->tco_res);  in ichwd_detach()
958 	bus_release_resource(dev, SYS_RES_IOPORT, sc->smi_rid, sc->smi_res);  in ichwd_detach()
961 	if (sc->gcs_res)  in ichwd_detach()
962 		bus_release_resource(sc->ich, SYS_RES_MEMORY, sc->gcs_rid,  in ichwd_detach()
963 		    sc->gcs_res);  in ichwd_detach()
964 	if (sc->gc_res)  in ichwd_detach()
965 		bus_release_resource(dev, SYS_RES_MEMORY, sc->gc_rid,  in ichwd_detach()
966 		    sc->gc_res);  in ichwd_detach()