1/*- 2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.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/* 28 * Exynos 5 Power Management Unit (PMU) 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD$"); 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/bus.h> 37#include <sys/kernel.h> 38#include <sys/module.h> 39#include <sys/malloc.h> 40#include <sys/rman.h> 41#include <sys/timeet.h> 42#include <sys/timetc.h> 43#include <sys/watchdog.h> 44 45#include <dev/ofw/openfirm.h> 46#include <dev/ofw/ofw_bus.h> 47#include <dev/ofw/ofw_bus_subr.h> 48 49#include <machine/bus.h> 50#include <machine/cpu.h> 51#include <machine/intr.h> 52 53#include <arm/samsung/exynos/exynos5_common.h> 54#include <arm/samsung/exynos/exynos5_pmu.h> 55 56#define EXYNOS5250 1 57#define EXYNOS5420 2 58 59/* PWR control */ 60#define EXYNOS5_PWR_USBHOST_PHY 0x708 61#define EXYNOS5_USBDRD_PHY_CTRL 0x704 62#define EXYNOS5420_USBDRD1_PHY_CTRL 0x708 63 64#define PHY_POWER_ON 1 65#define PHY_POWER_OFF 0 66 67struct pmu_softc { 68 struct resource *res[1]; 69 bus_space_tag_t bst; 70 bus_space_handle_t bsh; 71 device_t dev; 72 int model; 73}; 74 75struct pmu_softc *pmu_sc; 76 77static struct ofw_compat_data compat_data[] = { 78 {"samsung,exynos5420-pmu", EXYNOS5420}, 79 {"samsung,exynos5250-pmu", EXYNOS5250}, 80 {NULL, 0} 81}; 82 83static struct resource_spec pmu_spec[] = { 84 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 85 { -1, 0 } 86}; 87 88static int 89pmu_probe(device_t dev) 90{ 91 92 if (!ofw_bus_status_okay(dev)) 93 return (ENXIO); 94 95 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { 96 device_set_desc(dev, "Samsung Exynos 5 Power Management Unit"); 97 return (BUS_PROBE_DEFAULT); 98 } 99 100 return (ENXIO); 101} 102 103int 104usb2_phy_power_on(void) 105{ 106 struct pmu_softc *sc; 107 108 sc = pmu_sc; 109 if (sc == NULL) 110 return (-1); 111 112 /* EHCI */ 113 WRITE4(sc, EXYNOS5_PWR_USBHOST_PHY, PHY_POWER_ON); 114 115 return (0); 116} 117 118int 119usbdrd_phy_power_on(void) 120{ 121 struct pmu_softc *sc; 122 123 sc = pmu_sc; 124 if (sc == NULL) 125 return (-1); 126 127 /* 128 * First XHCI controller (left-side USB port on chromebook2) 129 */ 130 WRITE4(sc, EXYNOS5_USBDRD_PHY_CTRL, PHY_POWER_ON); 131 132 /* 133 * Second XHCI controller (right-side USB port on chrombook2) 134 * Only available on 5420. 135 */ 136 if (sc->model == EXYNOS5420) 137 WRITE4(sc, EXYNOS5420_USBDRD1_PHY_CTRL, PHY_POWER_ON); 138 139 return (0); 140} 141 142static int 143pmu_attach(device_t dev) 144{ 145 struct pmu_softc *sc; 146 147 sc = device_get_softc(dev); 148 sc->dev = dev; 149 sc->model = ofw_bus_search_compatible(dev, compat_data)->ocd_data; 150 151 if (bus_alloc_resources(dev, pmu_spec, sc->res)) { 152 device_printf(dev, "could not allocate resources\n"); 153 return (ENXIO); 154 } 155 156 /* Memory interface */ 157 sc->bst = rman_get_bustag(sc->res[0]); 158 sc->bsh = rman_get_bushandle(sc->res[0]); 159 160 pmu_sc = sc; 161 162 return (0); 163} 164 165static device_method_t pmu_methods[] = { 166 DEVMETHOD(device_probe, pmu_probe), 167 DEVMETHOD(device_attach, pmu_attach), 168 { 0, 0 } 169}; 170 171static driver_t pmu_driver = { 172 "pmu", 173 pmu_methods, 174 sizeof(struct pmu_softc), 175}; 176 177static devclass_t pmu_devclass; 178 179DRIVER_MODULE(pmu, simplebus, pmu_driver, pmu_devclass, 0, 0); 180