127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
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/*-
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* Copyright (c) 2011 Jakub Wojciech Klama <jceel@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm/lpc/lpcreg.h>
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#include <arm/lpc/lpcvar.h>
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struct lpc_pwr_softc {
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device_t dp_dev;
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struct resource * dp_mem_res;
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bus_space_tag_t dp_bst;
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bus_space_handle_t dp_bsh;
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};
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static struct lpc_pwr_softc *lpc_pwr_sc = NULL;
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static int lpc_pwr_probe(device_t);
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static int lpc_pwr_attach(device_t);
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#define lpc_pwr_read_4(_sc, _reg) \
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bus_space_read_4((_sc)->dp_bst, (_sc)->dp_bsh, _reg)
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#define lpc_pwr_write_4(_sc, _reg, _val) \
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bus_space_write_4((_sc)->dp_bst, (_sc)->dp_bsh, _reg, _val)
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static int
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lpc_pwr_probe(device_t dev)
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{
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if (!ofw_bus_is_compatible(dev, "lpc,pwr"))
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return (ENXIO);
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device_set_desc(dev, "LPC32x0 Power Controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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lpc_pwr_attach(device_t dev)
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{
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struct lpc_pwr_softc *sc = device_get_softc(dev);
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int rid;
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sc->dp_dev = dev;
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rid = 0;
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sc->dp_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (!sc->dp_mem_res) {
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device_printf(dev, "cannot allocate memory window\n");
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return (ENXIO);
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}
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sc->dp_bst = rman_get_bustag(sc->dp_mem_res);
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sc->dp_bsh = rman_get_bushandle(sc->dp_mem_res);
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lpc_pwr_sc = sc;
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return (0);
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}
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uint32_t
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lpc_pwr_read(device_t dev, int reg)
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{
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return (lpc_pwr_read_4(lpc_pwr_sc, reg));
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}
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void
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lpc_pwr_write(device_t dev, int reg, uint32_t value)
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{
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lpc_pwr_write_4(lpc_pwr_sc, reg, value);
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}
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static device_method_t lpc_pwr_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, lpc_pwr_probe),
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DEVMETHOD(device_attach, lpc_pwr_attach),
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{ 0, 0 }
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};
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static devclass_t lpc_pwr_devclass;
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static driver_t lpc_pwr_driver = {
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"pwr",
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lpc_pwr_methods,
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sizeof(struct lpc_pwr_softc),
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};
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DRIVER_MODULE(pwr, simplebus, lpc_pwr_driver, lpc_pwr_devclass, 0, 0);
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