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/* $OpenBSD: led.c,v 1.1 2007/05/29 04:08:02 kettenis Exp $ */
/*
* Copyright (c) 2007 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Driver for leds on Fire V215/V245.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/timeout.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <sparc64/dev/ebusreg.h>
#include <sparc64/dev/ebusvar.h>
/*
* Register access is indirect, through an address and data port.
*/
#define EPIC_DATA 0x40
#define EPIC_ADDR 0x41
#define EPIC_WRITE_MASK 0x80
#define EPIC_FW_VERSION 0x05
#define EPIC_LED_STATE0 0x06
#define EPIC_ALERT_LED_MASK 0x0C
#define EPIC_ALERT_LED_OFF 0x00
#define EPIC_ALERT_LED_ON 0x04
#define EPIC_POWER_LED_MASK 0x30
#define EPIC_POWER_LED_OFF 0x00
#define EPIC_POWER_LED_ON 0x10
#define EPIC_POWER_LED_SB_BLINK 0x20
#define EPIC_POWER_LED_FAST_BLINK 0x30
struct led_softc {
struct device sc_dv;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct timeout sc_to;
int sc_on;
struct blink_led sc_blink;
};
int led_match(struct device *, void *, void *);
void led_attach(struct device *, struct device *, void *);
struct cfattach led_ca = {
sizeof(struct led_softc), led_match, led_attach
};
struct cfdriver led_cd = {
NULL, "led", DV_DULL
};
void led_blink(void *, int);
void led_blink_finish(void *);
int
led_match(struct device *parent, void *cf, void *aux)
{
struct ebus_attach_args *ea = aux;
char *str;
if (strcmp("env-monitor", ea->ea_name) != 0)
return (0);
str = getpropstring(ea->ea_node, "compatible");
if (strcmp(str, "epic") == 0)
return (1);
return (0);
}
void
led_attach(struct device *parent, struct device *self, void *aux)
{
struct led_softc *sc = (void *)self;
struct ebus_attach_args *ea = aux;
int rev;
if (ebus_bus_map(ea->ea_iotag, 0,
EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
sc->sc_iot = ea->ea_iotag;
} else if (ebus_bus_map(ea->ea_memtag, 0,
EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
sc->sc_iot = ea->ea_memtag;
} else {
printf("%s: can't map register space\n", self->dv_xname);
return;
}
bus_space_write_1(sc->sc_iot, sc->sc_ioh, EPIC_ADDR, EPIC_FW_VERSION);
delay(10000);
rev = bus_space_read_1(sc->sc_iot, sc->sc_ioh, EPIC_DATA);
printf(": rev 0x%02x\n", rev);
/* Turn off the alert LED. */
bus_space_write_1(sc->sc_iot, sc->sc_ioh,
EPIC_WRITE_MASK, EPIC_ALERT_LED_MASK);
bus_space_write_1(sc->sc_iot, sc->sc_ioh,
EPIC_ADDR, EPIC_LED_STATE0);
delay(10000);
bus_space_write_1(sc->sc_iot, sc->sc_ioh,
EPIC_DATA, EPIC_ALERT_LED_OFF);
timeout_set(&sc->sc_to, led_blink_finish, sc);
sc->sc_blink.bl_func = led_blink;
sc->sc_blink.bl_arg = sc;
blink_led_register(&sc->sc_blink);
}
void
led_blink(void *v, int on)
{
struct led_softc *sc = v;
sc->sc_on = on;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, EPIC_ADDR, EPIC_LED_STATE0);
timeout_add(&sc->sc_to, max(1, hz / 100));
}
void
led_blink_finish(void *v)
{
struct led_softc *sc = v;
u_int8_t reg;
if (sc->sc_on)
reg = EPIC_ALERT_LED_ON;
else
reg = EPIC_ALERT_LED_OFF;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, EPIC_DATA, reg);
}
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