/*-
* Copyright (c) 2009 Marius Strobl <marius@FreeBSD.org>
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <dev/led/led.h>
#include <dev/ofw/ofw_bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#define EPIC_DELAY 10000
#define EPIC_NREG 1
#define EPIC_FW_LED 0
#define EPIC_FW_LED_DATA 0x40
#define EPIC_FW_LED_ADDR 0x41
#define EPIC_FW_LED_WRITE_MASK 0x80
#define EPIC_FW_VERSION 0x05
#define EPIC_LED_STATE0 0x06
#define EPIC_LED_ALERT_MASK 0x0c
#define EPIC_LED_ALERT_OFF 0x00
#define EPIC_LED_ALERT_ON 0x04
#define EPIC_LED_POWER_MASK 0x30
#define EPIC_LED_POWER_OFF 0x00
#define EPIC_LED_POWER_ON 0x10
#define EPIC_LED_POWER_SB_BLINK 0x20
#define EPIC_LED_POWER_FAST_BLINK 0x30
static struct resource_spec epic_res_spec[] = {
{ SYS_RES_MEMORY, EPIC_FW_LED, RF_ACTIVE },
{ -1, 0 }
};
struct epic_softc {
struct mtx sc_mtx;
struct resource *sc_res[EPIC_NREG];
struct cdev *sc_led_dev_alert;
struct cdev *sc_led_dev_power;
};
#define EPIC_FW_LED_READ(sc, off) ({ \
uint8_t __val; \
bus_write_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_ADDR, (off));\
bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_ADDR, 1, \
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); \
DELAY(EPIC_DELAY); \
__val = bus_read_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_DATA);\
bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_DATA, 1, \
BUS_SPACE_BARRIER_READ); \
DELAY(EPIC_DELAY); \
__val; \
})
#define EPIC_FW_LED_WRITE(sc, off, mask, val) do { \
bus_write_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_ADDR, (off));\
bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_ADDR, 1, \
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); \
DELAY(EPIC_DELAY); \
bus_write_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_WRITE_MASK, \
(mask)); \
bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_WRITE_MASK, \
1, BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); \
DELAY(EPIC_DELAY); \
bus_write_1((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_DATA, (val));\
bus_barrier((sc)->sc_res[EPIC_FW_LED], EPIC_FW_LED_DATA, 1, \
BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); \
DELAY(EPIC_DELAY); \
} while (0)
#define EPIC_LOCK_INIT(sc) \
mtx_init(&(sc)->sc_mtx, "epic mtx", NULL, MTX_DEF)
#define EPIC_LOCK_DESTROY(sc) mtx_destroy(&(sc)->sc_mtx)
#define EPIC_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
#define EPIC_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)
static device_probe_t epic_probe;
static device_attach_t epic_attach;
static device_detach_t epic_detach;
static void epic_led_alert(void *arg, int onoff);
static void epic_led_power(void *arg, int onoff);
static device_method_t epic_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, epic_probe),
DEVMETHOD(device_attach, epic_attach),
DEVMETHOD(device_detach, epic_detach),
DEVMETHOD_END
};
static devclass_t epic_devclass;
DEFINE_CLASS_0(epic, epic_driver, epic_methods,
sizeof(struct epic_softc));
DRIVER_MODULE(epic, ebus, epic_driver, epic_devclass, 0, 0);
static int
epic_probe(device_t dev)
{
const char* compat;
compat = ofw_bus_get_compat(dev);
if (compat != NULL && strcmp(ofw_bus_get_name(dev),
"env-monitor") == 0 && strcmp(compat, "epic") == 0) {
device_set_desc(dev, "Sun Fire V215/V245 LEDs");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
epic_attach(device_t dev)
{
struct epic_softc *sc;
sc = device_get_softc(dev);
if (bus_alloc_resources(dev, epic_res_spec, sc->sc_res)) {
device_printf(dev, "failed to allocate resources\n");
bus_release_resources(dev, epic_res_spec, sc->sc_res);
return (ENXIO);
}
EPIC_LOCK_INIT(sc);
if (bootverbose)
device_printf(dev, "version 0x%x\n",
EPIC_FW_LED_READ(sc, EPIC_FW_VERSION));
sc->sc_led_dev_alert = led_create(epic_led_alert, sc, "alert");
sc->sc_led_dev_power = led_create(epic_led_power, sc, "power");
return (0);
}
static int
epic_detach(device_t dev)
{
struct epic_softc *sc;
sc = device_get_softc(dev);
led_destroy(sc->sc_led_dev_alert);
led_destroy(sc->sc_led_dev_power);
bus_release_resources(dev, epic_res_spec, sc->sc_res);
EPIC_LOCK_DESTROY(sc);
return (0);
}
static void
epic_led_alert(void *arg, int onoff)
{
struct epic_softc *sc;
sc = (struct epic_softc *)arg;
EPIC_LOCK(sc);
EPIC_FW_LED_WRITE(sc, EPIC_LED_STATE0, EPIC_LED_ALERT_MASK,
onoff ? EPIC_LED_ALERT_ON : EPIC_LED_ALERT_OFF);
EPIC_UNLOCK(sc);
}
static void
epic_led_power(void *arg, int onoff)
{
struct epic_softc *sc;
sc = (struct epic_softc *)arg;
EPIC_LOCK(sc);
EPIC_FW_LED_WRITE(sc, EPIC_LED_STATE0, EPIC_LED_POWER_MASK,
onoff ? EPIC_LED_POWER_ON : EPIC_LED_POWER_OFF);
EPIC_UNLOCK(sc);
}
