1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
38 #include <sys/watchdog.h>
45 #define	viawd_read_4(sc, off)	bus_read_4((sc)->wd_res, (off))
47 	bus_write_4((sc)->wd_res, (off), (val))
50 	{ DEVICEID_VT8251, "VIA VT8251 watchdog timer" },
51 	{ DEVICEID_CX700,  "VIA CX700 watchdog timer" },
52 	{ DEVICEID_VX800,  "VIA VX800 watchdog timer" },
53 	{ DEVICEID_VX855,  "VIA VX855 watchdog timer" },
54 	{ DEVICEID_VX900,  "VIA VX900 watchdog timer" },
82 	sc->timeout = timeout;  in viawd_tmr_set()
86  * Watchdog event handler - called by the framework to enable or disable
87  * the watchdog or change the initial timeout value.
95 	/* Convert from power-of-two-ns to second. */  in viawd_event()
99 		if (timeout != sc->timeout)  in viawd_event()
115 	for (id = viawd_devices; id->desc != NULL; id++)  in viawd_find()
116 		if (pci_get_device(dev) == id->device)  in viawd_find()
128 	if (device_find_child(parent, driver->name, DEVICE_UNIT_ANY) == NULL)  in viawd_identify()
129 		BUS_ADD_CHILD(parent, 0, driver->name, 0);  in viawd_identify()
139 	device_set_desc(dev, id->desc);  in viawd_probe()
151 	sc->dev = dev;  in viawd_attach()
155 		device_printf(dev, "Can not find watchdog device.\n");  in viawd_attach()
158 	sc->sb_dev = sb_dev;  in viawd_attach()
160 	/* Get watchdog memory base. */  in viawd_attach()
164 		    "Watchdog disabled in BIOS or hardware\n");  in viawd_attach()
169 	sc->wd_rid = VIAWD_CONFIG_BASE;  in viawd_attach()
170 	sc->wd_res = bus_alloc_resource_any(sb_dev, SYS_RES_MEMORY, &sc->wd_rid,  in viawd_attach()
172 	if (sc->wd_res == NULL) {  in viawd_attach()
173 		device_printf(dev, "Unable to map watchdog memory\n");  in viawd_attach()
176 	if (rman_get_size(sc->wd_res) < VIAWD_MEM_LEN) {  in viawd_attach()
177 		device_printf(dev, "Bad size for watchdog memory: %#x\n",  in viawd_attach()
178 		    (unsigned)rman_get_size(sc->wd_res));  in viawd_attach()
182 	/* Check if watchdog fired last boot. */  in viawd_attach()
186 		    "ERROR: watchdog rebooted the system\n");  in viawd_attach()
191 	/* Register the watchdog event handler. */  in viawd_attach()
192 	sc->ev_tag = EVENTHANDLER_REGISTER(watchdog_list, viawd_event, sc, 0);  in viawd_attach()
196 	if (sc->wd_res != NULL)  in viawd_attach()
198 		    sc->wd_rid, sc->wd_res);  in viawd_attach()
211 	if (sc->ev_tag != NULL)  in viawd_detach()
212 		EVENTHANDLER_DEREGISTER(watchdog_list, sc->ev_tag);  in viawd_detach()
213 	sc->ev_tag = NULL;  in viawd_detach()
216 	 * Do not stop the watchdog on shutdown if active but bump the  in viawd_detach()
217 	 * timer to avoid spurious reset.  in viawd_detach()
224 		    "Keeping watchdog alive during shutdown for %d seconds\n",  in viawd_detach()
228 	if (sc->wd_res != NULL)  in viawd_detach()
229 		bus_release_resource(sc->sb_dev, SYS_RES_MEMORY,  in viawd_detach()
230 		    sc->wd_rid, sc->wd_res);  in viawd_detach()