xref: /src/sys/arch/i386/pnpbios/pciide_pnpbios.c

/*	$NetBSD: pciide_pnpbios.c,v 1.35 2023/12/20 15:00:08 thorpej Exp $	*/

/*
 * 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pciide_pnpbios.c,v 1.35 2023/12/20 15:00:08 thorpej Exp $");

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

#include <sys/bus.h>

#include <dev/ic/wdcreg.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(device_t, cfdata_t, void *);
static void	pciide_pnpbios_attach(device_t, device_t, 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);
extern int	pciide_dma_finish(void *, int, int, int);
extern int	pciide_compat_intr (void *);

CFATTACH_DECL_NEW(pciide_pnpbios, sizeof(struct pciide_softc),
    pciide_pnpbios_match, pciide_pnpbios_attach, NULL, NULL);

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

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

	return 0;
}

void
pciide_pnpbios_attach(device_t parent, device_t self, void *aux)
{
	struct pciide_softc *sc = device_private(self);
	struct pnpbiosdev_attach_args *aa = aux;
	struct pciide_channel *cp;
	struct ata_channel *wdc_cp;
	struct wdc_regs *wdr;
	bus_space_tag_t compat_iot;
	bus_space_handle_t cmd_baseioh, ctl_ioh;
	int i, drive, size;
	uint8_t idedma_ctl;

	sc->sc_wdcdev.sc_atac.atac_dev = self;

	aprint_naive(": disk controller\n");
	aprint_normal("\n");
	pnpbios_print_devres(self, aa);

	aprint_normal_dev(self, "Toshiba Extended IDE Controller\n");

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

	sc->sc_dmat = &pci_bus_dma_tag;

	cp = &sc->pciide_channels[0];
	sc->wdc_chanarray[0] = &cp->ata_channel;
	cp->ata_channel.ch_channel = 0;
	cp->ata_channel.ch_atac = &sc->sc_wdcdev.sc_atac;

	sc->sc_dma_ok = 1;
	for (i = 0; i < IDEDMA_NREGS; i++) {
		size = 4;
		if (size > (IDEDMA_SCH_OFFSET - i))
			size = IDEDMA_SCH_OFFSET - i;
		if (bus_space_subregion(sc->sc_dma_iot, sc->sc_dma_ioh,
		    i, size, &cp->dma_iohs[i]) != 0) {
			aprint_error_dev(self, "can't subregion offset %d "
			    "size %lu", i, (u_long)size);
			return;
		}
	}
	sc->sc_dma_maxsegsz = IDEDMA_BYTE_COUNT_MAX;
	sc->sc_dma_boundary = IDEDMA_BYTE_COUNT_ALIGN;
	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.irqack = pciide_irqack;
	sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DMA;
	sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanarray;
	sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
	sc->sc_wdcdev.wdc_maxdrives = 2;
	sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 | ATAC_CAP_DATA32;
	sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
	sc->sc_wdcdev.sc_atac.atac_dma_cap = 0;		/* XXX */
	sc->sc_wdcdev.sc_atac.atac_udma_cap = 0;	/* XXX */

	wdc_allocate_regs(&sc->sc_wdcdev);

	wdc_cp = &cp->ata_channel;
	wdr = CHAN_TO_WDC_REGS(wdc_cp);
	wdr->cmd_iot = compat_iot;
	wdr->cmd_baseioh = cmd_baseioh;

	for (i = 0; i < WDC_NREG; i++) {
		if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh, i,
		    i == 0 ? 4 : 1, &wdr->cmd_iohs[i]) != 0) {
			    aprint_error_dev(self, "unable to subregion "
				"control register\n");
			    return;
		}
	}
	wdc_init_shadow_regs(wdr);

	wdr->ctl_iot = wdr->data32iot = compat_iot;
	wdr->ctl_ioh = wdr->data32ioh = ctl_ioh;

	cp->compat = 1;

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

	wdcattach(wdc_cp);

	idedma_ctl = 0;
	for (drive = 0; drive < cp->ata_channel.ch_ndrives; drive++) {
		/*
		 * we have not probed the drives yet,
		 * allocate resources for all of them.
		 */
		if (pciide_dma_table_setup(sc, 0, drive) != 0) {
			/* Abort DMA setup */
			aprint_error(
			    "%s:%d:%d: can't allocate DMA maps, "
			    "using PIO transfers\n",
			    device_xname(self), 0, drive);
			sc->sc_dma_ok = 0;
			sc->sc_wdcdev.sc_atac.atac_cap &= ~ATAC_CAP_DMA;
			sc->sc_wdcdev.irqack = NULL;
			idedma_ctl = 0;
			break;
		}
		idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
	}
	if (idedma_ctl != 0) {
		/* Add software bits in status register */
		bus_space_write_1(sc->sc_dma_iot,
		    cp->dma_iohs[IDEDMA_CTL], 0, idedma_ctl);
	}
}