epic.c

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    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: releng/11.0/sys/sparc64/ebus/epic.c 227848 2011-11-22 21:55:40Z marius $");
   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 
   68 static struct resource_spec epic_res_spec[] = {
   69         { SYS_RES_MEMORY, EPIC_FW_LED, RF_ACTIVE },
   70         { -1, 0 }
   71 };
   72 
   73 struct 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 
  115 static device_probe_t epic_probe;
  116 static device_attach_t epic_attach;
  117 static device_detach_t epic_detach;
  118 
  119 static void epic_led_alert(void *arg, int onoff);
  120 static void epic_led_power(void *arg, int onoff);
  121 
  122 static 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 
  131 static devclass_t epic_devclass;
  132 
  133 DEFINE_CLASS_0(epic, epic_driver, epic_methods,
  134     sizeof(struct epic_softc));
  135 DRIVER_MODULE(epic, ebus, epic_driver, epic_devclass, 0, 0);
  136 
  137 static int
  138 epic_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 
  151 static int
  152 epic_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 
  175 static int
  176 epic_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 
  192 static void
  193 epic_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 
  205 static void
  206 epic_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 }

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FreeBSD/Linux Kernel Cross Reference sys/sparc64/ebus/epic.c

FreeBSD/Linux Kernel Cross Reference
sys/sparc64/ebus/epic.c