/*
 * Copyright (c) 1999 Soren S. Jorvang.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Handle the weird "almost PCI" IDE on Toshiba Porteges.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>

#include <machine/bus.h>

#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>

#include <i386/pnpbios/pnpbiosvar.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>

#include <dev/pci/pciidereg.h>
#include <dev/pci/pciidevar.h>

static int	pciide_pnpbios_match(struct device *, struct cfdata *, void *);
static void	pciide_pnpbios_attach(struct device *, struct device *, void *);

extern void	pciide_channel_dma_setup(struct pciide_channel *);
extern int	pciide_dma_init(void *, int, int, void *, size_t, int);
extern void	pciide_dma_start(void *, int, int, int);
extern int	pciide_dma_finish(void *, int, int, int);
extern int	pciide_compat_intr (void *);

struct cfattach pciide_pnpbios_ca = {
	sizeof(struct pciide_softc),
	pciide_pnpbios_match,
	pciide_pnpbios_attach
};

int
pciide_pnpbios_match(parent, match, aux)
	struct device *parent;
	struct cfdata *match;
	void *aux;
{
	struct pnpbiosdev_attach_args *aa = aux;

	if (strcmp(aa->idstr, "TOS7300") == 0)
		return 1;

	return 0;
}

void
pciide_pnpbios_attach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct pciide_softc *sc = (void *)self;
	struct pnpbiosdev_attach_args *aa = aux;
	struct pciide_channel *cp;
	struct channel_softc *wdc_cp;
	bus_space_tag_t compat_iot;
	bus_space_handle_t cmd_ioh, ctl_ioh;

	printf("\n%s: Toshiba Extended IDE Controller\n", self->dv_xname);

	if (pnpbios_io_map(aa->pbt, aa->resc, 2, &sc->sc_dma_iot,
	    &sc->sc_dma_ioh) != 0) {
		printf("%s: unable to map DMA registers\n", self->dv_xname);
		return;
	}
	if (pnpbios_io_map(aa->pbt, aa->resc, 0, &compat_iot,
	    &cmd_ioh) != 0) {
		printf("%s: unable to map command registers\n", self->dv_xname);
		return;
	}
	if (pnpbios_io_map(aa->pbt, aa->resc, 1, &compat_iot,
	    &ctl_ioh) != 0) {
		printf("%s: unable to map control register\n", self->dv_xname);
		return;
	}

	sc->sc_dmat = &pci_bus_dma_tag;

	sc->sc_dma_ok = 1;
	sc->sc_wdcdev.dma_arg = sc;
	sc->sc_wdcdev.dma_init = pciide_dma_init;
	sc->sc_wdcdev.dma_start = pciide_dma_start;
	sc->sc_wdcdev.dma_finish = pciide_dma_finish;
	sc->sc_wdcdev.channels = sc->wdc_chanarray;
	sc->sc_wdcdev.nchannels = 1;
	sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32;
	sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA | WDC_CAPABILITY_UDMA;
#if 0	/* Need documentation. */
	sc->sc_wdcdev.cap |= WDC_CAPABILITY_MODE;
#endif
        sc->sc_wdcdev.PIO_cap = 4;
        sc->sc_wdcdev.DMA_cap = 2;		/* XXX */
        sc->sc_wdcdev.UDMA_cap = 2;		/* XXX */

	cp = &sc->pciide_channels[0];
	sc->wdc_chanarray[0] = &cp->wdc_channel;
	cp->wdc_channel.channel = 0;
	cp->wdc_channel.wdc = &sc->sc_wdcdev;
	cp->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue),
						M_DEVBUF, M_NOWAIT);
	if (cp->wdc_channel.ch_queue == NULL) {
		printf("%s: unable to allocate memory for command queue\n",
			self->dv_xname);
		return;
	}

	wdc_cp = &cp->wdc_channel;
	wdc_cp->cmd_iot = compat_iot;
	wdc_cp->cmd_ioh = cmd_ioh;
	wdc_cp->ctl_iot = wdc_cp->data32iot = compat_iot;
	wdc_cp->ctl_ioh = wdc_cp->data32ioh = ctl_ioh;

	cp->hw_ok = 1;				/* XXX */
	cp->compat = 1;

	cp->ih = pnpbios_intr_establish(aa->pbt, aa->resc, 0, IPL_BIO,
					pciide_compat_intr, cp);

	wdcattach(wdc_cp);

	pciide_channel_dma_setup(cp);
}