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/* $OpenBSD: ipmi_acpi.c,v 1.4 2020/03/29 09:31:10 kettenis Exp $ */
/*
* Copyright (c) 2018 Patrick Wildt <patrick@blueri.se>
*
* 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/signalvar.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/apmvar.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>
#undef DEVNAME
#include <dev/ipmivar.h>
#define DEVNAME(s) ((s)->sc.sc_dev.dv_xname)
int ipmi_acpi_match(struct device *, void *, void *);
void ipmi_acpi_attach(struct device *, struct device *, void *);
int ipmi_acpi_parse_crs(int, union acpi_resource *, void *);
struct ipmi_acpi_softc {
struct ipmi_softc sc;
struct acpi_softc *sc_acpi;
struct aml_node *sc_devnode;
int sc_ift;
int sc_srv;
bus_size_t sc_iobase;
int sc_iospacing;
char sc_iotype;
};
struct cfattach ipmi_acpi_ca = {
sizeof(struct ipmi_acpi_softc), ipmi_acpi_match, ipmi_acpi_attach,
};
const char *ipmi_acpi_hids[] = { ACPI_DEV_IPMI, NULL };
int
ipmi_acpi_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aa = aux;
struct cfdata *cf = match;
/* sanity */
return (acpi_matchhids(aa, ipmi_acpi_hids, cf->cf_driver->cd_name));
}
void
ipmi_acpi_attach(struct device *parent, struct device *self, void *aux)
{
struct ipmi_acpi_softc *sc = (struct ipmi_acpi_softc *)self;
struct acpi_attach_args *aa = aux;
struct ipmi_attach_args ia;
struct aml_value res;
int64_t ift, srv = 0;
int rc;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_devnode = aa->aaa_node;
rc = aml_evalinteger(sc->sc_acpi, sc->sc_devnode, "_IFT", 0, NULL, &ift);
if (rc) {
printf(": no _IFT\n");
return;
}
sc->sc_ift = ift;
aml_evalinteger(sc->sc_acpi, sc->sc_devnode, "_SRV", 0, NULL, &srv);
sc->sc_srv = srv;
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_CRS", 0, NULL, &res)) {
printf(": no _CRS method\n");
return;
}
if (res.type != AML_OBJTYPE_BUFFER) {
printf(": invalid _CRS object (type %d len %d)\n",
res.type, res.length);
aml_freevalue(&res);
return;
}
aml_parse_resource(&res, ipmi_acpi_parse_crs, sc);
aml_freevalue(&res);
if (sc->sc_iotype == 0) {
printf("%s: incomplete resources (ift %d)\n",
DEVNAME(sc), sc->sc_ift);
return;
}
memset(&ia, 0, sizeof(ia));
ia.iaa_iot = sc->sc_acpi->sc_iot;
ia.iaa_memt = sc->sc_acpi->sc_memt;
ia.iaa_if_type = sc->sc_ift;
ia.iaa_if_rev = (sc->sc_srv >> 4);
ia.iaa_if_irq = -1;
ia.iaa_if_irqlvl = 0;
ia.iaa_if_iosize = 1;
ia.iaa_if_iospacing = sc->sc_iospacing;
ia.iaa_if_iobase = sc->sc_iobase;
ia.iaa_if_iotype = sc->sc_iotype;
ipmi_attach_common(&sc->sc, &ia);
}
int
ipmi_acpi_parse_crs(int crsidx, union acpi_resource *crs, void *arg)
{
struct ipmi_acpi_softc *sc = arg;
int type = AML_CRSTYPE(crs);
bus_size_t addr;
char iotype;
switch (type) {
case SR_IOPORT:
addr = crs->sr_ioport._max;
iotype = 'i';
break;
case LR_MEM32FIXED:
addr = crs->lr_m32fixed._bas;
iotype = 'm';
break;
case LR_EXTIRQ:
/* Ignore for now. */
return 0;
default:
printf("\n%s: unexpected resource #%d type %d",
DEVNAME(sc), crsidx, type);
sc->sc_iotype = 0;
return -1;
}
switch (crsidx) {
case 0:
sc->sc_iobase = addr;
sc->sc_iospacing = 1;
sc->sc_iotype = iotype;
break;
case 1:
if (sc->sc_iotype != iotype) {
printf("\n%s: unexpected resource #%d type %d\n",
DEVNAME(sc), crsidx, type);
sc->sc_iotype = 0;
return -1;
}
if (addr <= sc->sc_iobase) {
sc->sc_iotype = 0;
return -1;
}
sc->sc_iospacing = addr - sc->sc_iobase;
break;
default:
printf("\n%s: invalid resource #%d type %d (ift %d)",
DEVNAME(sc), crsidx, type, sc->sc_ift);
sc->sc_iotype = 0;
return -1;
}
return 0;
}
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