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