rk30xx_pmu.c revision 261410
1/*- 2 * Copyright (c) 2013 Ganbold Tsagaankhuu <ganbold@gmail.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27/* PMU for Rockchip RK30xx */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/arm/rockchip/rk30xx_pmu.c 261410 2014-02-02 19:17:28Z ian $"); 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/bus.h> 35#include <sys/kernel.h> 36#include <sys/module.h> 37#include <sys/malloc.h> 38#include <sys/rman.h> 39#include <sys/timeet.h> 40#include <sys/timetc.h> 41#include <sys/watchdog.h> 42#include <machine/bus.h> 43#include <machine/cpu.h> 44#include <machine/intr.h> 45 46#include <dev/fdt/fdt_common.h> 47#include <dev/ofw/openfirm.h> 48#include <dev/ofw/ofw_bus.h> 49#include <dev/ofw/ofw_bus_subr.h> 50 51#include <machine/bus.h> 52#include <machine/fdt.h> 53 54#include "rk30xx_pmu.h" 55 56struct rk30_pmu_softc { 57 struct resource *res; 58 bus_space_tag_t bst; 59 bus_space_handle_t bsh; 60}; 61 62static struct rk30_pmu_softc *rk30_pmu_sc = NULL; 63 64#define pmu_read_4(sc, reg) \ 65 bus_space_read_4((sc)->bst, (sc)->bsh, (reg)) 66#define pmu_write_4(sc, reg, val) \ 67 bus_space_write_4((sc)->bst, (sc)->bsh, (reg), (val)) 68 69static int 70rk30_pmu_probe(device_t dev) 71{ 72 73 if (!ofw_bus_status_okay(dev)) 74 return (ENXIO); 75 76 if (ofw_bus_is_compatible(dev, "rockchip,rk30xx-pmu")) { 77 device_set_desc(dev, "RK30XX PMU"); 78 return(BUS_PROBE_DEFAULT); 79 } 80 81 return (ENXIO); 82} 83 84static int 85rk30_pmu_attach(device_t dev) 86{ 87 struct rk30_pmu_softc *sc = device_get_softc(dev); 88 int rid = 0; 89 90 if (rk30_pmu_sc) 91 return (ENXIO); 92 93 sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 94 if (!sc->res) { 95 device_printf(dev, "could not allocate resource\n"); 96 return (ENXIO); 97 } 98 99 sc->bst = rman_get_bustag(sc->res); 100 sc->bsh = rman_get_bushandle(sc->res); 101 102 rk30_pmu_sc = sc; 103 104 return (0); 105} 106 107static device_method_t rk30_pmu_methods[] = { 108 DEVMETHOD(device_probe, rk30_pmu_probe), 109 DEVMETHOD(device_attach, rk30_pmu_attach), 110 { 0, 0 } 111}; 112 113static driver_t rk30_pmu_driver = { 114 "rk30_pmu", 115 rk30_pmu_methods, 116 sizeof(struct rk30_pmu_softc), 117}; 118 119static devclass_t rk30_pmu_devclass; 120 121DRIVER_MODULE(rk30_pmu, simplebus, rk30_pmu_driver, rk30_pmu_devclass, 0, 0); 122 123void 124rk30_pmu_gpio_pud(uint32_t pin, uint32_t state) 125{ 126 uint32_t offset; 127 128 offset = PMU_GPIO0A_PULL + ((pin / 8) * 4); 129 pin = (pin % 8) * 2; 130 pmu_write_4(rk30_pmu_sc, offset, (0x3 << (16 + pin)) | (state << pin)); 131} 132 133