Author: zbb Date: Thu Jun 8 16:48:09 2017 New Revision: 319704 URL: https://svnweb.freebsd.org/changeset/base/319704
Log: Enable MBUS bridge configuration in mv_rtc driver This patch fixes sporadic problems with updating time with mv_rtc driver by configuring access to it via MBUS. For this purpose already existing second set of resources in rtc@3800 node of Armada 38x DT is used. Submitted by: Dominik Ermel <d...@semihalf.com> Obtained from: Semihalf Sponsored by: Stormshield Differential revision: https://reviews.freebsd.org/D10901 Modified: head/sys/arm/mv/armada38x/rtc.c Modified: head/sys/arm/mv/armada38x/rtc.c ============================================================================== --- head/sys/arm/mv/armada38x/rtc.c Thu Jun 8 16:46:38 2017 (r319703) +++ head/sys/arm/mv/armada38x/rtc.c Thu Jun 8 16:48:09 2017 (r319704) @@ -69,17 +69,30 @@ __FBSDID("$FreeBSD$"); #define RTC_STATUS_ALARM1_MASK 0x1 #define RTC_STATUS_ALARM2_MASK 0x2 -#define MV_RTC_LOCK(sc) mtx_lock(&(sc)->mutex) -#define MV_RTC_UNLOCK(sc) mtx_unlock(&(sc)->mutex) +#define MV_RTC_LOCK(sc) mtx_lock_spin(&(sc)->mutex) +#define MV_RTC_UNLOCK(sc) mtx_unlock_spin(&(sc)->mutex) +#define RTC_BRIDGE_TIMING_CTRL 0x0 +#define RTC_WRCLK_PERIOD_SHIFT 0 +#define RTC_WRCLK_PERIOD_MASK 0x00000003FF +#define RTC_WRCLK_PERIOD_MAX 0x3FF +#define RTC_READ_OUTPUT_DELAY_SHIFT 26 +#define RTC_READ_OUTPUT_DELAY_MASK 0x007C000000 +#define RTC_READ_OUTPUT_DELAY_MAX 0x1F + +#define RTC_RES 0 +#define RTC_SOC_RES 1 + + static struct resource_spec res_spec[] = { { SYS_RES_MEMORY, 0, RF_ACTIVE }, + { SYS_RES_MEMORY, 1, RF_ACTIVE }, { -1, 0 } }; struct mv_rtc_softc { device_t dev; - struct resource *res; + struct resource *res[2]; struct mtx mutex; }; @@ -90,9 +103,11 @@ static int mv_rtc_detach(device_t dev); static int mv_rtc_gettime(device_t dev, struct timespec *ts); static int mv_rtc_settime(device_t dev, struct timespec *ts); -static uint32_t mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t off); -static int mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off, +static inline uint32_t mv_rtc_reg_read(struct mv_rtc_softc *sc, + bus_size_t off); +static inline int mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off, uint32_t val); +static inline void mv_rtc_configure_bus(struct mv_rtc_softc *sc); static device_method_t mv_rtc_methods[] = { DEVMETHOD(device_probe, mv_rtc_probe), @@ -180,14 +195,16 @@ mv_rtc_attach(device_t dev) clock_register(dev, RTC_RES_US); - mtx_init(&sc->mutex, device_get_nameunit(dev), NULL, MTX_DEF); + mtx_init(&sc->mutex, device_get_nameunit(dev), NULL, MTX_SPIN); - ret = bus_alloc_resources(dev, res_spec, &sc->res); + ret = bus_alloc_resources(dev, res_spec, sc->res); + if (ret != 0) { device_printf(dev, "could not allocate resources\n"); mtx_destroy(&sc->mutex); return (ENXIO); } + mv_rtc_configure_bus(sc); return (0); } @@ -201,7 +218,7 @@ mv_rtc_detach(device_t dev) mtx_destroy(&sc->mutex); - bus_release_resources(dev, res_spec, &sc->res); + bus_release_resources(dev, res_spec, sc->res); return (0); } @@ -267,11 +284,11 @@ mv_rtc_settime(device_t dev, struct timespec *ts) return (0); } -static uint32_t +static inline uint32_t mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t off) { - return (bus_read_4(sc->res, off)); + return (bus_read_4(sc->res[RTC_RES], off)); } /* @@ -279,12 +296,24 @@ mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t of * register write to the RTC hard macro so that the required update * can occur without holding off the system bus */ -static int +static inline int mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off, uint32_t val) { - bus_write_4(sc->res, off, val); + bus_write_4(sc->res[RTC_RES], off, val); DELAY(5); return (0); +} + +static inline void +mv_rtc_configure_bus(struct mv_rtc_softc *sc) +{ + int val; + + val = bus_read_4(sc->res[RTC_SOC_RES], RTC_BRIDGE_TIMING_CTRL); + val &= ~(RTC_WRCLK_PERIOD_MASK | RTC_READ_OUTPUT_DELAY_MASK); + val |= RTC_WRCLK_PERIOD_MAX << RTC_WRCLK_PERIOD_SHIFT; + val |= RTC_READ_OUTPUT_DELAY_MAX << RTC_READ_OUTPUT_DELAY_SHIFT; + bus_write_4(sc->res[RTC_SOC_RES], RTC_BRIDGE_TIMING_CTRL, val); } _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
