Add epic(4), a driver for the front panel LEDs in Sun Fire V215/V245.

It's named after the driver doing the same job in OpenSolaris.

1 files changed, 216 insertions, 0 deletions

diff --git a/sys/sparc64/ebus/epic.c b/sys/sparc64/ebus/epic.c
new file mode 100644
index 0000000..8c20e94
--- /dev/null
+++ b/sys/sparc64/ebus/epic.c
@@ -0,0 +1,216 @@
+/*-
+ * 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),
+
+	KOBJMETHOD_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);
+}