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/*-
* Copyright (c) 2008 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/module.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <dev/ofw/ofw_bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#define SCHPPM_NREG 1
#define SCHPPM_ESTAR 0
#define SCHPPM_ESTAR_CTRL 0x00
#define SCHPPM_ESTAR_CTRL_1 0x00000001
#define SCHPPM_ESTAR_CTRL_2 0x00000002
#define SCHPPM_ESTAR_CTRL_32 0x00000020
#define SCHPPM_ESTAR_CTRL_MASK \
(SCHPPM_ESTAR_CTRL_1 | SCHPPM_ESTAR_CTRL_2 | SCHPPM_ESTAR_CTRL_32)
static struct resource_spec schppm_res_spec[] = {
{ SYS_RES_MEMORY, SCHPPM_ESTAR, RF_ACTIVE },
{ -1, 0 }
};
struct schppm_softc {
struct resource *sc_res[SCHPPM_NREG];
};
#define SCHPPM_READ(sc, reg, off) \
bus_read_8((sc)->sc_res[(reg)], (off))
#define SCHPPM_WRITE(sc, reg, off, val) \
bus_write_8((sc)->sc_res[(reg)], (off), (val))
static device_probe_t schppm_probe;
static device_attach_t schppm_attach;
static device_method_t schppm_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, schppm_probe),
DEVMETHOD(device_attach, schppm_attach),
DEVMETHOD_END
};
static devclass_t schppm_devclass;
DEFINE_CLASS_0(schppm, schppm_driver, schppm_methods,
sizeof(struct schppm_softc));
DRIVER_MODULE(schppm, nexus, schppm_driver, schppm_devclass, 0, 0);
static int
schppm_probe(device_t dev)
{
const char* compat;
compat = ofw_bus_get_compat(dev);
if (compat != NULL && strcmp(ofw_bus_get_name(dev), "ppm") == 0 &&
strcmp(compat, "gp2-ppm") == 0) {
device_set_desc(dev, "Schizo power management");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
schppm_attach(device_t dev)
{
struct schppm_softc *sc;
sc = device_get_softc(dev);
if (bus_alloc_resources(dev, schppm_res_spec, sc->sc_res)) {
device_printf(dev, "failed to allocate resources\n");
bus_release_resources(dev, schppm_res_spec, sc->sc_res);
return (ENXIO);
}
if (bootverbose) {
device_printf(dev, "running at ");
switch (SCHPPM_READ(sc, SCHPPM_ESTAR, SCHPPM_ESTAR_CTRL) &
SCHPPM_ESTAR_CTRL_MASK) {
case SCHPPM_ESTAR_CTRL_1:
printf("full");
break;
case SCHPPM_ESTAR_CTRL_2:
printf("half");
break;
case SCHPPM_ESTAR_CTRL_32:
printf("1/32");
break;
default:
printf("unknown");
break;
}
printf(" speed\n");
}
return (0);
}
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