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/* $OpenBSD: acpipwrres.c,v 1.4 2010/07/21 19:35:15 deraadt Exp $ */
/*
* Copyright (c) 2009 Paul Irofti <pirofti@openbsd.org>
*
* 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/proc.h>
#include <sys/signalvar.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpidev.h>
#include <dev/acpi/amltypes.h>
#include <dev/acpi/dsdt.h>
int acpipwrres_match(struct device *, void *, void *);
void acpipwrres_attach(struct device *, struct device *, void *);
int acpipwrres_notify(struct aml_node *, int, void *);
#define NOTIFY_PWRRES_OFF 0
#define NOTIFY_PWRRES_ON 1
#ifdef ACPIPWRRES_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x)
#endif
struct acpipwrres_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct acpi_softc *sc_acpi;
struct aml_node *sc_devnode;
TAILQ_HEAD(acpipwrres_cons_h, acpipwrres_consumer) sc_cons;
int sc_level;
int sc_order;
int sc_ncons;
int sc_state;
#define ACPIPWRRES_OFF 0
#define ACPIPWRRES_ON 1
#define ACPIPWRRES_UNK -1
};
struct acpipwrres_consumer {
struct aml_node *cs_node;
TAILQ_ENTRY(acpipwrres_consumer) cs_link;
};
struct cfattach acpipwrres_ca = {
sizeof(struct acpipwrres_softc), acpipwrres_match, acpipwrres_attach
};
struct cfdriver acpipwrres_cd = {
NULL, "acpipwrres", DV_DULL
};
int acpipwrres_foundcons(struct aml_node *, void *);
int
acpipwrres_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aaa = aux;
struct cfdata *cf = match;
if (aaa->aaa_name == NULL || strcmp(aaa->aaa_name,
cf->cf_driver->cd_name) != 0 || aaa->aaa_table != NULL)
return (0);
return (1);
}
void
acpipwrres_attach(struct device *parent, struct device *self, void *aux)
{
struct acpipwrres_softc *sc = (struct acpipwrres_softc *)self;
struct acpi_attach_args *aaa = aux;
struct aml_value res;
extern struct aml_node aml_root;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_devnode = aaa->aaa_node;
memset(&res, 0, sizeof res);
printf(": %s\n", sc->sc_devnode->name);
aml_register_notify(sc->sc_devnode, aaa->aaa_dev,
acpipwrres_notify, sc, ACPIDEV_NOPOLL);
if (!aml_evalname(sc->sc_acpi, sc->sc_devnode, "_STA", 0, NULL, &res)) {
sc->sc_state = (int)aml_val2int(&res);
if (sc->sc_state != ACPIPWRRES_ON &&
sc->sc_state != ACPIPWRRES_OFF)
sc->sc_state = ACPIPWRRES_UNK;
} else
sc->sc_state = ACPIPWRRES_UNK;
DPRINTF(("%s: state = %d\n", DEVNAME(sc), sc->sc_state));
if (aml_evalnode(sc->sc_acpi, aaa->aaa_node, 0, NULL, &res) == 0) {
sc->sc_level = res.v_powerrsrc.pwr_level;
sc->sc_order = res.v_powerrsrc.pwr_order;
DPRINTF(("%s: level = %d, order %d\n", DEVNAME(sc),
sc->sc_level, sc->sc_order));
aml_freevalue(&res);
}
/* Get the list of consumers */
TAILQ_INIT(&sc->sc_cons);
aml_find_node(&aml_root, "_PRW", acpipwrres_foundcons, sc);
aml_find_node(&aml_root, "_PR0", acpipwrres_foundcons, sc);
aml_find_node(&aml_root, "_PR1", acpipwrres_foundcons, sc);
aml_find_node(&aml_root, "_PR2", acpipwrres_foundcons, sc);
}
int
acpipwrres_notify(struct aml_node *node, int notify, void *arg)
{
int fmatch = 0;
struct acpipwrres_consumer *cons;
struct acpipwrres_softc *sc = arg;
struct aml_value res;
memset(&res, 0, sizeof res);
TAILQ_FOREACH(cons, &sc->sc_cons, cs_link)
if (cons->cs_node == node) {
fmatch = 1;
break;
}
if (!fmatch)
return (0);
switch (notify) {
case NOTIFY_PWRRES_ON:
DPRINTF(("pwr: on devs %d\n", sc->sc_ncons));
if (sc->sc_ncons++ == 0)
aml_evalname(sc->sc_acpi, sc->sc_devnode, "_ON", 0, NULL,
&res);
aml_freevalue(&res);
break;
case NOTIFY_PWRRES_OFF:
DPRINTF(("pwr: off devs %d\n", sc->sc_ncons));
if (--sc->sc_ncons == 0)
aml_evalname(sc->sc_acpi, sc->sc_devnode, "_OFF", 0, NULL,
&res);
aml_freevalue(&res);
break;
default:
printf("%s: unknown event 0x%02x\n", DEVNAME(sc), notify);
break;
}
return (0);
}
int
acpipwrres_foundcons(struct aml_node *node, void *arg)
{
int i = 0;
struct acpipwrres_consumer *cons;
struct aml_node *pnode;
struct acpipwrres_softc *sc = (struct acpipwrres_softc *)arg;
struct aml_value res;
extern struct aml_node aml_root;
memset(&res, 0, sizeof res);
if (aml_evalnode(sc->sc_acpi, node, 0, NULL, &res) == -1) {
DPRINTF(("pwr: consumer not found\n"));
return (-1);
} else {
DPRINTF(("%s: node name %s\n", DEVNAME(sc), aml_nodename(node)));
if (!strcmp(node->name, "_PRW"))
i = 2; /* _PRW first two values are ints */
for (; i < res.length; i++) {
pnode = aml_searchname(&aml_root,
res.v_package[i]->v_string);
if (pnode == sc->sc_devnode) {
DPRINTF(("%s: consumer match\n", DEVNAME(sc)));
cons = malloc(sizeof *cons, M_DEVBUF,
M_WAITOK | M_ZERO);
cons->cs_node = pnode;
TAILQ_INSERT_HEAD(&sc->sc_cons, cons, cs_link);
}
}
}
return (0);
}
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