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/* $OpenBSD: acpipci.c,v 1.1 2018/10/26 20:26:19 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/device.h>
#include <sys/extent.h>
#include <sys/malloc.h>
#include <sys/systm.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>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
/* 33DB4D5B-1FF7-401C-9657-7441C03DD766 */
#define ACPI_PCI_UUID \
{ 0x5b, 0x4d, 0xdb, 0x33, \
0xf7, 0x1f, \
0x1c, 0x40, \
0x96, 0x57, \
0x74, 0x41, 0xc0, 0x3d, 0xd7, 0x66 }
/* Support field. */
#define ACPI_PCI_PCIE_CONFIG 0x00000001
#define ACPI_PCI_ASPM 0x00000002
#define ACPI_PCI_CPMC 0x00000004
#define ACPI_PCI_SEGMENTS 0x00000008
#define ACPI_PCI_MSI 0x00000010
/* Control field. */
#define ACPI_PCI_PCIE_HOTPLUG 0x00000001
struct acpipci_softc {
struct device sc_dev;
struct acpi_softc *sc_acpi;
struct aml_node *sc_node;
};
int acpipci_match(struct device *, void *, void *);
void acpipci_attach(struct device *, struct device *, void *);
struct cfattach acpipci_ca = {
sizeof(struct acpipci_softc), acpipci_match, acpipci_attach
};
struct cfdriver acpipci_cd = {
NULL, "acpipci", DV_DULL
};
const char *acpipci_hids[] = {
"PNP0A08",
"PNP0A03",
NULL
};
int
acpipci_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aaa = aux;
struct cfdata *cf = match;
return acpi_matchhids(aaa, acpipci_hids, cf->cf_driver->cd_name);
}
void
acpipci_attach(struct device *parent, struct device *self, void *aux)
{
struct acpi_attach_args *aaa = aux;
struct acpipci_softc *sc = (struct acpipci_softc *)self;
struct aml_value args[4];
struct aml_value res;
static uint8_t uuid[16] = ACPI_PCI_UUID;
uint32_t buf[3];
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_node = aaa->aaa_node;
printf(" %s", sc->sc_node->name);
memset(args, 0, sizeof(args));
args[0].type = AML_OBJTYPE_BUFFER;
args[0].v_buffer = uuid;
args[0].length = sizeof(uuid);
args[1].type = AML_OBJTYPE_INTEGER;
args[1].v_integer = 1;
args[2].type = AML_OBJTYPE_INTEGER;
args[2].v_integer = 3;
args[3].type = AML_OBJTYPE_BUFFER;
args[3].v_buffer = (uint8_t *)buf;
args[3].length = sizeof(buf);
memset(buf, 0, sizeof(buf));
buf[0] = 0x0;
buf[1] = ACPI_PCI_PCIE_CONFIG | ACPI_PCI_MSI;
buf[2] = ACPI_PCI_PCIE_HOTPLUG;
if (aml_evalname(sc->sc_acpi, sc->sc_node, "_OSC", 4, args, &res)) {
printf(": _OSC failed\n");
return;
}
if (res.type == AML_OBJTYPE_BUFFER) {
size_t len = res.length;
uint32_t *p = (uint32_t *)res.v_buffer;
printf(":");
while (len >= 4) {
printf(" 0x%08x", *p);
p++;
len -= 4;
}
}
printf("\n");
}
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