30  * Support for Winbond watchdog.
38  * the watchdog functions and possibly others poking the registers at the same
50 #include <sys/watchdog.h>
66 #define	WB_LDN_REG_LDN8		0x08	/* GPIO 2, Watchdog */
69  * LDN8 (GPIO 2, Watchdog) specific registers and options.
75 /* CRF5: Watchdog scale, P20. Mapped to reg_1. */
81 /* CRF6: Watchdog Timeout (0 == off). Mapped to reg_timeout. */
84 /* CRF7: Watchdog mouse, keyb, force, .. Mapped to reg_2. */
90 #define	WB_LDN8_CRF7_IRQS	0x0f	/* irq source for watchdog, 2 == SMI */
107 	 * Special feature to let the watchdog fire at a different
108 	 * timeout as set by watchdog(4) but still use that API to
237  * Return the watchdog related registers as we last read them.  This will
238  * usually not give the current timeout or state on whether the watchdog
252 	sbuf_printf(&sb, "LDN8 (GPIO2, Watchdog): ");  in sysctl_wb_debug()
264  * the registers the same time as the watchdog, this sysctl handler should
282  * Sysctl handlers to force a watchdog timeout or to test the NMI functionality
287  * lot of boards have jumpers to change the action on watchdog timeout or
288  * disable the watchdog completely.
325 	/* Force watchdog to fire. */  in sysctl_wb_force_test_nmi()
334  * Print current watchdog state.
348 	    (sc->reg_2 & WB_LDN8_CRF7_TS) ? "Watchdog fired. " : "",  in wb_print_state()
358  * (Re)load the watchdog counter depending on timeout.  A timeout of 0 will
359  * disable the watchdog.
379 		wb_print_state(sc, "Before watchdog counter (re)load");  in wb_set_watchdog()
382 		/* Disable watchdog. */  in wb_set_watchdog()
412 		/* Set timer and arm/reset the watchdog. */  in wb_set_watchdog()
417 		wb_print_state(sc, "After watchdog counter (re)load");  in wb_set_watchdog()
422  * watchdog(9) EVENTHANDLER function implementation to (re)load the counter
423  * with the given timeout or disable the watchdog.
433 	KASSERT(sc != NULL, ("%s: watchdog handler function called without "  in wb_watchdog_fn()
438 		/* Reset (and arm) watchdog. */  in wb_watchdog_fn()
452 		/* Disable watchdog. */  in wb_watchdog_fn()
455 			/* Failed to disable watchdog. */  in wb_watchdog_fn()
481 			    "%s (0x%02x/0x%02x) Watchdog Timer",  in wb_probe()
591 	/* Read the current watchdog configuration. */  in wb_attach()
596 	/* Print current state if bootverbose or watchdog already enabled. */  in wb_attach()
598 		wb_print_state(sc, "Before watchdog attach");  in wb_attach()
605 	 * Clear a previous watchdog timeout event (if still set).  in wb_attach()
621             "Timeout in seconds overriding default watchdog timeout");  in wb_attach()
635 	    sysctl_wb_force_test_nmi, "I", "Enable to force watchdog to fire.");  in wb_attach()
637 	/* Register watchdog. */  in wb_attach()
642 		wb_print_state(sc, "After watchdog attach");  in wb_attach()
654 	/* Unregister and stop the watchdog if running. */  in wb_detach()