1/*- 2 * Copyright (c) 2009 Marius Strobl <marius@FreeBSD.org> 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#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/bus.h> 33#include <sys/kernel.h> 34#include <sys/lock.h> 35#include <sys/module.h> 36#include <sys/mutex.h> 37#include <sys/resource.h> 38#include <sys/rman.h> 39 40#include <dev/led/led.h> 41#include <dev/ofw/ofw_bus.h> 42 43#include <machine/bus.h> 44#include <machine/resource.h> 45 46#define EPIC_DELAY 10000 47 48#define EPIC_NREG 1 49#define EPIC_FW_LED 0 50 51#define EPIC_FW_LED_DATA 0x40 52#define EPIC_FW_LED_ADDR 0x41 53#define EPIC_FW_LED_WRITE_MASK 0x80 54 55#define EPIC_FW_VERSION 0x05 56#define EPIC_LED_STATE0 0x06 57 58#define EPIC_LED_ALERT_MASK 0x0c 59#define EPIC_LED_ALERT_OFF 0x00 60#define EPIC_LED_ALERT_ON 0x04 61 62#define EPIC_LED_POWER_MASK 0x30 63#define EPIC_LED_POWER_OFF 0x00 64#define EPIC_LED_POWER_ON 0x10 65#define EPIC_LED_POWER_SB_BLINK 0x20 66#define EPIC_LED_POWER_FAST_BLINK 0x30 67 68static struct resource_spec epic_res_spec[] = { 69 { SYS_RES_MEMORY, EPIC_FW_LED, RF_ACTIVE }, 70 { -1, 0 } 71}; 72 73struct epic_softc { 74 struct mtx sc_mtx; 75 struct resource *sc_res[EPIC_NREG]; 76 struct cdev *sc_led_dev_alert; 77 struct cdev *sc_led_dev_power; 78}; 79 80#define EPIC_FW_LED_READ(sc, off) ({ \ 81 uint8_t __val; \ 82 bus_write_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_ADDR, (off));\ 83 bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_ADDR, 1, \ 84 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); \ 85 DELAY(EPIC_DELAY); \ 86 __val = bus_read_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_DATA);\ 87 bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_DATA, 1, \ 88 BUS_SPACE_BARRIER_READ); \ 89 DELAY(EPIC_DELAY); \ 90 __val; \ 91}) 92 93#define EPIC_FW_LED_WRITE(sc, off, mask, val) do { \ 94 bus_write_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_ADDR, (off));\ 95 bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_ADDR, 1, \ 96 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); \ 97 DELAY(EPIC_DELAY); \ 98 bus_write_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_WRITE_MASK, \ 99 (mask)); \ 100 bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_WRITE_MASK, \ 101 1, BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); \ 102 DELAY(EPIC_DELAY); \ 103 bus_write_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_DATA, (val));\ 104 bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_DATA, 1, \ 105 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); \ 106 DELAY(EPIC_DELAY); \ 107} while (0) 108 109#define EPIC_LOCK_INIT(sc) \ 110 mtx_init(&(sc)->sc_mtx, "epic mtx", NULL, MTX_DEF) 111#define EPIC_LOCK_DESTROY(sc) mtx_destroy(&(sc)->sc_mtx) 112#define EPIC_LOCK(sc) mtx_lock(&(sc)->sc_mtx) 113#define EPIC_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) 114 115static device_probe_t epic_probe; 116static device_attach_t epic_attach; 117static device_detach_t epic_detach; 118 119static void epic_led_alert(void *arg, int onoff); 120static void epic_led_power(void *arg, int onoff); 121 122static device_method_t epic_methods[] = { 123 /* Device interface */ 124 DEVMETHOD(device_probe, epic_probe), 125 DEVMETHOD(device_attach, epic_attach), 126 DEVMETHOD(device_detach, epic_detach), 127 128 DEVMETHOD_END 129}; 130 131static devclass_t epic_devclass; 132 133DEFINE_CLASS_0(epic, epic_driver, epic_methods, 134 sizeof(struct epic_softc)); 135DRIVER_MODULE(epic, ebus, epic_driver, epic_devclass, 0, 0); 136 137static int 138epic_probe(device_t dev) 139{ 140 const char* compat; 141 142 compat = ofw_bus_get_compat(dev); 143 if (compat != NULL && strcmp(ofw_bus_get_name(dev), 144 "env-monitor") == 0 && strcmp(compat, "epic") == 0) { 145 device_set_desc(dev, "Sun Fire V215/V245 LEDs"); 146 return (BUS_PROBE_DEFAULT); 147 } 148 return (ENXIO); 149} 150 151static int 152epic_attach(device_t dev) 153{ 154 struct epic_softc *sc; 155 156 sc = device_get_softc(dev); 157 if (bus_alloc_resources(dev, epic_res_spec, sc->sc_res)) { 158 device_printf(dev, "failed to allocate resources\n"); 159 bus_release_resources(dev, epic_res_spec, sc->sc_res); 160 return (ENXIO); 161 } 162 163 EPIC_LOCK_INIT(sc); 164 165 if (bootverbose) 166 device_printf(dev, "version 0x%x\n", 167 EPIC_FW_LED_READ(sc, EPIC_FW_VERSION)); 168 169 sc->sc_led_dev_alert = led_create(epic_led_alert, sc, "alert"); 170 sc->sc_led_dev_power = led_create(epic_led_power, sc, "power"); 171 172 return (0); 173} 174 175static int 176epic_detach(device_t dev) 177{ 178 struct epic_softc *sc; 179 180 sc = device_get_softc(dev); 181 182 led_destroy(sc->sc_led_dev_alert); 183 led_destroy(sc->sc_led_dev_power); 184 185 bus_release_resources(dev, epic_res_spec, sc->sc_res); 186 187 EPIC_LOCK_DESTROY(sc); 188 189 return (0); 190} 191 192static void 193epic_led_alert(void *arg, int onoff) 194{ 195 struct epic_softc *sc; 196 197 sc = (struct epic_softc *)arg; 198 199 EPIC_LOCK(sc); 200 EPIC_FW_LED_WRITE(sc, EPIC_LED_STATE0, EPIC_LED_ALERT_MASK, 201 onoff ? EPIC_LED_ALERT_ON : EPIC_LED_ALERT_OFF); 202 EPIC_UNLOCK(sc); 203} 204 205static void 206epic_led_power(void *arg, int onoff) 207{ 208 struct epic_softc *sc; 209 210 sc = (struct epic_softc *)arg; 211 212 EPIC_LOCK(sc); 213 EPIC_FW_LED_WRITE(sc, EPIC_LED_STATE0, EPIC_LED_POWER_MASK, 214 onoff ? EPIC_LED_POWER_ON : EPIC_LED_POWER_OFF); 215 EPIC_UNLOCK(sc); 216} 217