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/*-
* Copyright (c) 2004 Jason L. Wright (jason@thought.net)
* Copyright (c) 2005 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 ``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 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.
*
* from: OpenBSD: clkbrd.c,v 1.5 2004/10/01 18:18:49 jason Exp
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.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>
#include <sparc64/fhc/clkbrdreg.h>
#define CLKBRD_NREG 3
#define CLKBRD_CF 0
#define CLKBRD_CLK 1
#define CLKBRD_CLKVER 2
struct clkbrd_softc {
struct device *sc_dev;
struct resource *sc_res[CLKBRD_NREG];
int sc_rid[CLKBRD_NREG];
bus_space_tag_t sc_bt[CLKBRD_NREG];
bus_space_handle_t sc_bh[CLKBRD_NREG];
uint8_t sc_clk_ctrl;
struct cdev *sc_led_dev;
int sc_flags;
#define CLKBRD_HAS_CLKVER (1 << 0)
};
static devclass_t clkbrd_devclass;
static device_probe_t clkbrd_probe;
static device_attach_t clkbrd_attach;
static device_detach_t clkbrd_detach;
static void clkbrd_free_resources(struct clkbrd_softc *);
static void clkbrd_led_func(void *, int);
static device_method_t clkbrd_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, clkbrd_probe),
DEVMETHOD(device_attach, clkbrd_attach),
DEVMETHOD(device_detach, clkbrd_detach),
{ 0, 0 }
};
static driver_t clkbrd_driver = {
"clkbrd",
clkbrd_methods,
sizeof(struct clkbrd_softc),
};
DRIVER_MODULE(clkbrd, fhc, clkbrd_driver, clkbrd_devclass, 0, 0);
static int
clkbrd_probe(device_t dev)
{
if (strcmp(ofw_bus_get_name(dev), "clock-board") == 0) {
device_set_desc(dev, "Clock Board");
return (0);
}
return (ENXIO);
}
static int
clkbrd_attach(device_t dev)
{
struct clkbrd_softc *sc;
int i, slots;
uint8_t r;
sc = device_get_softc(dev);
sc->sc_dev = dev;
for (i = CLKBRD_CF; i <= CLKBRD_CLKVER; i++) {
sc->sc_rid[i] = i;
sc->sc_res[i] = bus_alloc_resource_any(sc->sc_dev,
SYS_RES_MEMORY, &sc->sc_rid[i], RF_ACTIVE);
if (sc->sc_res[i] == NULL) {
if (i != CLKBRD_CLKVER) {
device_printf(sc->sc_dev,
"could not allocate resource %d\n", i);
goto fail;
}
continue;
}
sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
if (i == CLKBRD_CLKVER)
sc->sc_flags |= CLKBRD_HAS_CLKVER;
}
slots = 4;
r = bus_space_read_1(sc->sc_bt[CLKBRD_CLK], sc->sc_bh[CLKBRD_CLK],
CLK_STS1);
switch (r & CLK_STS1_SLOTS_MASK) {
case CLK_STS1_SLOTS_16:
slots = 16;
break;
case CLK_STS1_SLOTS_8:
slots = 8;
break;
case CLK_STS1_SLOTS_4:
if (sc->sc_flags & CLKBRD_HAS_CLKVER) {
r = bus_space_read_1(sc->sc_bt[CLKBRD_CLKVER],
sc->sc_bh[CLKBRD_CLKVER], CLKVER_SLOTS);
if (r != 0 &&
(r & CLKVER_SLOTS_MASK) == CLKVER_SLOTS_PLUS)
slots = 5;
}
}
device_printf(sc->sc_dev, "Sun Enterprise Exx00 machine: %d slots\n",
slots);
sc->sc_clk_ctrl = bus_space_read_1(sc->sc_bt[CLKBRD_CLK],
sc->sc_bh[CLKBRD_CLK], CLK_CTRL);
sc->sc_led_dev = led_create(clkbrd_led_func, sc, "clockboard");
return (0);
fail:
clkbrd_free_resources(sc);
return (ENXIO);
}
static int
clkbrd_detach(device_t dev)
{
struct clkbrd_softc *sc;
sc = device_get_softc(dev);
led_destroy(sc->sc_led_dev);
bus_space_write_1(sc->sc_bt[CLKBRD_CLK], sc->sc_bh[CLKBRD_CLK],
CLK_CTRL, sc->sc_clk_ctrl);
bus_space_read_1(sc->sc_bt[CLKBRD_CLK], sc->sc_bh[CLKBRD_CLK],
CLK_CTRL);
clkbrd_free_resources(sc);
return (0);
}
static void
clkbrd_free_resources(struct clkbrd_softc *sc)
{
int i;
for (i = CLKBRD_CF; i <= CLKBRD_CLKVER; i++)
if (sc->sc_res[i] != NULL)
bus_release_resource(sc->sc_dev, SYS_RES_MEMORY,
sc->sc_rid[i], sc->sc_res[i]);
}
static void
clkbrd_led_func(void *arg, int onoff)
{
struct clkbrd_softc *sc;
uint8_t r;
sc = (struct clkbrd_softc *)arg;
r = bus_space_read_1(sc->sc_bt[CLKBRD_CLK], sc->sc_bh[CLKBRD_CLK],
CLK_CTRL);
if (onoff)
r |= CLK_CTRL_RLED;
else
r &= ~CLK_CTRL_RLED;
bus_space_write_1(sc->sc_bt[CLKBRD_CLK], sc->sc_bh[CLKBRD_CLK],
CLK_CTRL, r);
bus_space_read_1(sc->sc_bt[CLKBRD_CLK], sc->sc_bh[CLKBRD_CLK],
CLK_CTRL);
}
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