Date: Tue, 30 Aug 2016 10:21:32 +0000 (UTC) From: Jared McNeill <jmcneill@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r305058 - head/sys/arm/allwinner Message-ID: <201608301021.u7UALWM8011892@repo.freebsd.org>
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Author: jmcneill Date: Tue Aug 30 10:21:32 2016 New Revision: 305058 URL: https://svnweb.freebsd.org/changeset/base/305058 Log: Add support for Allwinner A64 watchdog timer. Modified: head/sys/arm/allwinner/aw_wdog.c Modified: head/sys/arm/allwinner/aw_wdog.c ============================================================================== --- head/sys/arm/allwinner/aw_wdog.c Tue Aug 30 08:34:49 2016 (r305057) +++ head/sys/arm/allwinner/aw_wdog.c Tue Aug 30 10:21:32 2016 (r305058) @@ -30,6 +30,7 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/watchdog.h> +#include <sys/reboot.h> #include <sys/bus.h> #include <sys/kernel.h> #include <sys/lock.h> @@ -54,6 +55,7 @@ __FBSDID("$FreeBSD$"); #define A10_WDOG_CTRL 0x00 #define A31_WDOG_CTRL 0x10 #define WDOG_CTRL_RESTART (1 << 0) +#define A31_WDOG_CTRL_KEY (0xa57 << 1) #define A10_WDOG_MODE 0x04 #define A31_WDOG_MODE 0x18 #define A10_WDOG_MODE_INTVL_SHIFT 3 @@ -92,6 +94,7 @@ struct aw_wdog_softc { struct resource * res; struct mtx mtx; uint8_t wdog_ctrl; + uint32_t wdog_ctrl_key; uint8_t wdog_mode; uint8_t wdog_mode_intvl_shift; uint8_t wdog_mode_en; @@ -108,7 +111,8 @@ static struct ofw_compat_data compat_dat {NULL, 0} }; -static void aw_wdog_watchdog_fn(void *private, u_int cmd, int *error); +static void aw_wdog_watchdog_fn(void *, u_int, int *); +static void aw_wdog_shutdown_fn(void *, int); static int aw_wdog_probe(device_t dev) @@ -160,6 +164,7 @@ aw_wdog_attach(device_t dev) break; case A31_WATCHDOG: sc->wdog_ctrl = A31_WDOG_CTRL; + sc->wdog_ctrl_key = A31_WDOG_CTRL_KEY; sc->wdog_mode = A31_WDOG_MODE; sc->wdog_mode_intvl_shift = A31_WDOG_MODE_INTVL_SHIFT; sc->wdog_mode_en = WDOG_MODE_EN; @@ -173,6 +178,9 @@ aw_wdog_attach(device_t dev) mtx_init(&sc->mtx, "AW Watchdog", "aw_wdog", MTX_DEF); EVENTHANDLER_REGISTER(watchdog_list, aw_wdog_watchdog_fn, sc, 0); + EVENTHANDLER_REGISTER(shutdown_final, aw_wdog_shutdown_fn, sc, + SHUTDOWN_PRI_LAST - 1); + return (0); } @@ -198,7 +206,8 @@ aw_wdog_watchdog_fn(void *private, u_int WRITE(sc, sc->wdog_mode, (wd_intervals[i].value << sc->wdog_mode_intvl_shift) | sc->wdog_mode_en); - WRITE(sc, sc->wdog_ctrl, WDOG_CTRL_RESTART); + WRITE(sc, sc->wdog_ctrl, + WDOG_CTRL_RESTART | sc->wdog_ctrl_key); if (sc->wdog_config) WRITE(sc, sc->wdog_config, sc->wdog_config_value); @@ -222,6 +231,13 @@ aw_wdog_watchdog_fn(void *private, u_int mtx_unlock(&sc->mtx); } +static void +aw_wdog_shutdown_fn(void *private, int howto) +{ + if ((howto & (RB_POWEROFF|RB_HALT)) == 0) + aw_wdog_watchdog_reset(); +} + void aw_wdog_watchdog_reset() { @@ -237,6 +253,8 @@ aw_wdog_watchdog_reset() if (aw_wdog_sc->wdog_config) WRITE(aw_wdog_sc, aw_wdog_sc->wdog_config, aw_wdog_sc->wdog_config_value); + WRITE(aw_wdog_sc, aw_wdog_sc->wdog_ctrl, + WDOG_CTRL_RESTART | aw_wdog_sc->wdog_ctrl_key); while(1) ;
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