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/* $OpenBSD: acpicmos.c,v 1.1 2018/03/27 21:11:16 kettenis Exp $ */
/*
* Copyright (c) 2018 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/dsdt.h>
#include <dev/ic/mc146818reg.h>
struct acpicmos_softc {
struct device sc_dev;
struct aml_node *sc_node;
};
int acpicmos_match(struct device *, void *, void *);
void acpicmos_attach(struct device *, struct device *, void *);
struct cfattach acpicmos_ca = {
sizeof(struct acpicmos_softc), acpicmos_match, acpicmos_attach
};
struct cfdriver acpicmos_cd = {
NULL, "acpicmos", DV_DULL
};
const char *acpicmos_hids[] = {
"PNP0B00",
"PNP0B01",
"PNP0B02",
NULL
};
int acpicmos_opreg_handler(void *, int, uint64_t, int, uint64_t *);
int
acpicmos_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aaa = aux;
struct cfdata *cf = match;
return acpi_matchhids(aaa, acpicmos_hids, cf->cf_driver->cd_name);
}
void
acpicmos_attach(struct device *parent, struct device *self, void *aux)
{
struct acpicmos_softc *sc = (struct acpicmos_softc *)self;
struct acpi_attach_args *aaa = aux;
printf("\n");
sc->sc_node = aaa->aaa_node;
aml_register_regionspace(sc->sc_node, ACPI_OPREG_CMOS,
sc, acpicmos_opreg_handler);
}
int
acpicmos_opreg_handler(void *cookie, int iodir, uint64_t address, int size,
uint64_t *value)
{
/* Only allow 8-bit access. */
if (size != 8 || address > 0xff)
return -1;
if (iodir == ACPI_IOREAD)
*value = mc146818_read(NULL, address);
else
mc146818_write(NULL, address, *value);
return 0;
}
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