diff options
Diffstat (limited to 'sys/arm/rockchip/rk30xx_pmu.c')
-rw-r--r-- | sys/arm/rockchip/rk30xx_pmu.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/sys/arm/rockchip/rk30xx_pmu.c b/sys/arm/rockchip/rk30xx_pmu.c new file mode 100644 index 0000000..55a7fdc --- /dev/null +++ b/sys/arm/rockchip/rk30xx_pmu.c @@ -0,0 +1,130 @@ +/*- + * Copyright (c) 2013 Ganbold Tsagaankhuu <ganbold@gmail.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. + */ + +/* PMU for Rockchip RK30xx */ + +#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 <machine/bus.h> +#include <machine/cpu.h> +#include <machine/frame.h> +#include <machine/intr.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 "rk30xx_pmu.h" + +struct rk30_pmu_softc { + struct resource *res; + bus_space_tag_t bst; + bus_space_handle_t bsh; +}; + +static struct rk30_pmu_softc *rk30_pmu_sc = NULL; + +#define pmu_read_4(sc, reg) \ + bus_space_read_4((sc)->bst, (sc)->bsh, (reg)) +#define pmu_write_4(sc, reg, val) \ + bus_space_write_4((sc)->bst, (sc)->bsh, (reg), (val)) + +static int +rk30_pmu_probe(device_t dev) +{ + + if (ofw_bus_is_compatible(dev, "rockchip,rk30xx-pmu")) { + device_set_desc(dev, "RK30XX PMU"); + return(BUS_PROBE_DEFAULT); + } + + return (ENXIO); +} + +static int +rk30_pmu_attach(device_t dev) +{ + struct rk30_pmu_softc *sc = device_get_softc(dev); + int rid = 0; + + if (rk30_pmu_sc) + return (ENXIO); + + sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); + if (!sc->res) { + device_printf(dev, "could not allocate resource\n"); + return (ENXIO); + } + + sc->bst = rman_get_bustag(sc->res); + sc->bsh = rman_get_bushandle(sc->res); + + rk30_pmu_sc = sc; + + return (0); +} + +static device_method_t rk30_pmu_methods[] = { + DEVMETHOD(device_probe, rk30_pmu_probe), + DEVMETHOD(device_attach, rk30_pmu_attach), + { 0, 0 } +}; + +static driver_t rk30_pmu_driver = { + "rk30_pmu", + rk30_pmu_methods, + sizeof(struct rk30_pmu_softc), +}; + +static devclass_t rk30_pmu_devclass; + +DRIVER_MODULE(rk30_pmu, simplebus, rk30_pmu_driver, rk30_pmu_devclass, 0, 0); + +void +rk30_pmu_gpio_pud(uint32_t pin, uint32_t state) +{ + uint32_t offset; + + offset = PMU_GPIO0A_PULL + ((pin / 8) * 4); + pin = (pin % 8) * 2; + pmu_write_4(rk30_pmu_sc, offset, (0x3 << (16 + pin)) | (state << pin)); +} + |