/*	$OpenBSD: sdhc_acpi.c,v 1.1 2016/01/11 07:36:10 kettenis Exp $	*/
/*
 * Copyright (c) 2016 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/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>
#undef DEVNAME
#include <dev/sdmmc/sdhcreg.h>
#include <dev/sdmmc/sdhcvar.h>
#include <dev/sdmmc/sdmmcvar.h>

struct sdhc_acpi_softc {
	struct sdhc_softc sc;
	struct acpi_softc *sc_acpi;
	struct aml_node *sc_node;

	bus_space_tag_t sc_memt;
	bus_space_handle_t sc_memh;
	bus_addr_t sc_addr;
	bus_size_t sc_size;

	int sc_irq;
	int sc_irq_flags;
	void *sc_ih;

	struct sdhc_host *sc_host;
};

int	sdhc_acpi_match(struct device *, void *, void *);
void	sdhc_acpi_attach(struct device *, struct device *, void *);

struct cfattach sdhc_acpi_ca = {
	sizeof(struct sdhc_acpi_softc), sdhc_acpi_match, sdhc_acpi_attach
};

const char *sdhc_hids[] = {
	"PNP0D40",
	"INT33BB",
	"80860F14",
	"PNP0FFF",
	0
};

int	sdhc_acpi_parse_resources(union acpi_resource *, void *);

int
sdhc_acpi_match(struct device *parent, void *match, void *aux)
{
	struct acpi_attach_args *aaa = aux;
	struct cfdata *cf = match;
	int64_t sta;

	if (!acpi_matchhids(aaa, sdhc_hids, cf->cf_driver->cd_name))
		return 0;

	if (aml_evalinteger((struct acpi_softc *)parent, aaa->aaa_node,
	    "_STA", 0, NULL, &sta))
		sta = STA_PRESENT | STA_ENABLED | STA_DEV_OK | 0x1000;

	if ((sta & STA_PRESENT) == 0)
		return 0;

	return 1;
}

void
sdhc_acpi_attach(struct device *parent, struct device *self, void *aux)
{
	struct acpi_attach_args *aaa = aux;
	struct sdhc_acpi_softc *sc = (struct sdhc_acpi_softc *)self;
	struct aml_value res;

	sc->sc_acpi = (struct acpi_softc *)parent;
	sc->sc_node = aaa->aaa_node;
	printf(": %s", sc->sc_node->name);

	if (aml_evalname(sc->sc_acpi, sc->sc_node, "_CRS", 0, NULL, &res)) {
		printf(", can't find registers\n");
		return;
	}

	aml_parse_resource(&res, sdhc_acpi_parse_resources, sc);
	printf(" addr 0x%lx/0x%lx", sc->sc_addr, sc->sc_size);
	if (sc->sc_addr == 0 || sc->sc_size == 0) {
		printf("\n");
		return;
	}

	printf(" irq %d", sc->sc_irq);

	sc->sc_memt = aaa->aaa_memt;
	if (bus_space_map(sc->sc_memt, sc->sc_addr, sc->sc_size, 0,
	    &sc->sc_memh)) {
		printf(", can't map registers\n");
		return;
	}

	sc->sc_ih = acpi_intr_establish(sc->sc_irq, sc->sc_irq_flags, IPL_BIO,
	    sdhc_intr, sc, sc->sc.sc_dev.dv_xname);
	if (sc->sc_ih == NULL) {
		printf(", can't establish interrupt\n");
		return;
	}

	printf("\n");

	sc->sc.sc_host = &sc->sc_host;
	sdhc_host_found(&sc->sc, sc->sc_memt, sc->sc_memh, sc->sc_size, 0, 0);
}

int
sdhc_acpi_parse_resources(union acpi_resource *crs, void *arg)
{
	struct sdhc_acpi_softc *sc = arg;
	int type = AML_CRSTYPE(crs);

	switch (type) {
	case LR_MEM32FIXED:
		sc->sc_addr = crs->lr_m32fixed._bas;
		sc->sc_size = crs->lr_m32fixed._len;
		break;
	case LR_EXTIRQ:
		sc->sc_irq = crs->lr_extirq.irq[0];
		sc->sc_irq_flags = crs->lr_extirq.flags;
		break;
	case 0x8c:
		/* XXX GPIO; use for card detect. */
		break;
	default:
		printf(" type 0x%x\n", type);
		break;
	}

	return 0;
}