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/*-
* Copyright (c) 2011 Jakub Wojciech Klama <jceel@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/malloc.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <arm/lpc/lpcreg.h>
#include <arm/lpc/lpcvar.h>
struct lpc_pwr_softc {
device_t dp_dev;
struct resource * dp_mem_res;
bus_space_tag_t dp_bst;
bus_space_handle_t dp_bsh;
};
static struct lpc_pwr_softc *lpc_pwr_sc = NULL;
static int lpc_pwr_probe(device_t);
static int lpc_pwr_attach(device_t);
#define lpc_pwr_read_4(_sc, _reg) \
bus_space_read_4((_sc)->dp_bst, (_sc)->dp_bsh, _reg)
#define lpc_pwr_write_4(_sc, _reg, _val) \
bus_space_write_4((_sc)->dp_bst, (_sc)->dp_bsh, _reg, _val)
static int
lpc_pwr_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "lpc,pwr"))
return (ENXIO);
device_set_desc(dev, "LPC32x0 Power Controller");
return (BUS_PROBE_DEFAULT);
}
static int
lpc_pwr_attach(device_t dev)
{
struct lpc_pwr_softc *sc = device_get_softc(dev);
int rid;
sc->dp_dev = dev;
rid = 0;
sc->dp_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (!sc->dp_mem_res) {
device_printf(dev, "cannot allocate memory window\n");
return (ENXIO);
}
sc->dp_bst = rman_get_bustag(sc->dp_mem_res);
sc->dp_bsh = rman_get_bushandle(sc->dp_mem_res);
lpc_pwr_sc = sc;
return (0);
}
uint32_t
lpc_pwr_read(device_t dev, int reg)
{
return (lpc_pwr_read_4(lpc_pwr_sc, reg));
}
void
lpc_pwr_write(device_t dev, int reg, uint32_t value)
{
lpc_pwr_write_4(lpc_pwr_sc, reg, value);
}
static device_method_t lpc_pwr_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, lpc_pwr_probe),
DEVMETHOD(device_attach, lpc_pwr_attach),
{ 0, 0 }
};
static devclass_t lpc_pwr_devclass;
static driver_t lpc_pwr_driver = {
"pwr",
lpc_pwr_methods,
sizeof(struct lpc_pwr_softc),
};
DRIVER_MODULE(pwr, simplebus, lpc_pwr_driver, lpc_pwr_devclass, 0, 0);
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