diff options
Diffstat (limited to 'sys/arm/samsung/exynos/exynos5_pmu.c')
| -rw-r--r-- | sys/arm/samsung/exynos/exynos5_pmu.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/sys/arm/samsung/exynos/exynos5_pmu.c b/sys/arm/samsung/exynos/exynos5_pmu.c new file mode 100644 index 0000000..a6c8160 --- /dev/null +++ b/sys/arm/samsung/exynos/exynos5_pmu.c @@ -0,0 +1,181 @@ +/*- + * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Exynos 5 Power Management Unit (PMU) + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/malloc.h> +#include <sys/rman.h> +#include <sys/timeet.h> +#include <sys/timetc.h> +#include <sys/watchdog.h> + +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <machine/bus.h> +#include <machine/fdt.h> +#include <machine/cpu.h> +#include <machine/intr.h> + +#include <arm/samsung/exynos/exynos5_common.h> +#include <arm/samsung/exynos/exynos5_pmu.h> + +#define EXYNOS5250 1 +#define EXYNOS5420 2 + +/* PWR control */ +#define EXYNOS5_PWR_USBHOST_PHY 0x708 +#define EXYNOS5_USBDRD_PHY_CTRL 0x704 +#define EXYNOS5420_USBDRD1_PHY_CTRL 0x708 + +#define PHY_POWER_ON 1 +#define PHY_POWER_OFF 0 + +struct pmu_softc { + struct resource *res[1]; + bus_space_tag_t bst; + bus_space_handle_t bsh; + device_t dev; + int model; +}; + +struct pmu_softc *pmu_sc; + +static struct ofw_compat_data compat_data[] = { + {"samsung,exynos5420-pmu", EXYNOS5420}, + {"samsung,exynos5250-pmu", EXYNOS5250}, + {NULL, 0} +}; + +static struct resource_spec pmu_spec[] = { + { SYS_RES_MEMORY, 0, RF_ACTIVE }, + { -1, 0 } +}; + +static int +pmu_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { + device_set_desc(dev, "Samsung Exynos 5 Power Management Unit"); + return (BUS_PROBE_DEFAULT); + } + + return (ENXIO); +} + +int +usb2_phy_power_on(void) +{ + struct pmu_softc *sc; + + sc = pmu_sc; + if (sc == NULL) + return (-1); + + /* EHCI */ + WRITE4(sc, EXYNOS5_PWR_USBHOST_PHY, PHY_POWER_ON); + + return (0); +} + +int +usbdrd_phy_power_on(void) +{ + struct pmu_softc *sc; + + sc = pmu_sc; + if (sc == NULL) + return (-1); + + /* + * First XHCI controller (left-side USB port on chromebook2) + */ + WRITE4(sc, EXYNOS5_USBDRD_PHY_CTRL, PHY_POWER_ON); + + /* + * Second XHCI controller (right-side USB port on chrombook2) + * Only available on 5420. + */ + if (sc->model == EXYNOS5420) + WRITE4(sc, EXYNOS5420_USBDRD1_PHY_CTRL, PHY_POWER_ON); + + return (0); +} + +static int +pmu_attach(device_t dev) +{ + struct pmu_softc *sc; + + sc = device_get_softc(dev); + sc->dev = dev; + sc->model = ofw_bus_search_compatible(dev, compat_data)->ocd_data; + + if (bus_alloc_resources(dev, pmu_spec, sc->res)) { + device_printf(dev, "could not allocate resources\n"); + return (ENXIO); + } + + /* Memory interface */ + sc->bst = rman_get_bustag(sc->res[0]); + sc->bsh = rman_get_bushandle(sc->res[0]); + + pmu_sc = sc; + + return (0); +} + +static device_method_t pmu_methods[] = { + DEVMETHOD(device_probe, pmu_probe), + DEVMETHOD(device_attach, pmu_attach), + { 0, 0 } +}; + +static driver_t pmu_driver = { + "pmu", + pmu_methods, + sizeof(struct pmu_softc), +}; + +static devclass_t pmu_devclass; + +DRIVER_MODULE(pmu, simplebus, pmu_driver, pmu_devclass, 0, 0); |
