NetBSD/sys/dev/pci/ixpide.c

/*	$NetBSD: ixpide.c,v 1.1 2004/12/06 19:22:24 cube Exp $	*/

/*
 *  Copyright (c) 2004 The NetBSD Foundation.
 *  All rights reserved.
 *
 *  This code is derived from software contributed to the NetBSD Foundation
 *  by Quentin Garnier.
 * 
 *  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.
 *  3. All advertising materials mentioning features or use of this software
 *     must display the following acknowledgement:
 *         This product includes software developed by the NetBSD
 *         Foundation, Inc. and its contributors.
 *  4. Neither the name of The NetBSD Foundation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 * 
 *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ixpide.c,v 1.1 2004/12/06 19:22:24 cube Exp $");

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

#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciidereg.h>
#include <dev/pci/pciidevar.h>
#include <dev/pci/pciide_ixp_reg.h>

static int	ixpide_match(struct device *, struct cfdata *, void *);
static void	ixpide_attach(struct device *, struct device *, void *);

static void	ixp_chip_map(struct pciide_softc *, struct pci_attach_args *);
static void	ixp_setup_channel(struct ata_channel *);

CFATTACH_DECL(ixpide, sizeof(struct pciide_softc),
    ixpide_match, ixpide_attach, NULL, NULL);

static const struct pciide_product_desc pciide_ixpide_products[] = {
	{ PCI_PRODUCT_ATI_IXP_IDE,
	  0,
	  "ATI Technologies IXP IDE Controller",
	  ixp_chip_map
	},
	{ 0,
	  0,
	  NULL,
	  NULL
	}
};

static int
ixpide_match(struct device *parent, struct cfdata *cfdata, void *aux)
{
	struct pci_attach_args *pa = (struct pci_attach_args *)aux;

	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ATI &&
	    PCI_CLASS(pa->pa_class) == PCI_CLASS_MASS_STORAGE &&
	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_MASS_STORAGE_IDE &&
	    pciide_lookup_product(pa->pa_id, pciide_ixpide_products))
		return (2);
	return (0);
}

static void
ixpide_attach(struct device *parent, struct device *self, void *aux)
{
	struct pci_attach_args *pa = aux;
	struct pciide_softc *sc = (struct pciide_softc *)self;

	pciide_common_attach(sc, pa,
	    pciide_lookup_product(pa->pa_id, pciide_ixpide_products));
}

static void
ixp_chip_map(struct pciide_softc *sc, struct pci_attach_args *pa)
{
	struct pciide_channel *cp;
	int channel;
	pcireg_t interface;
	bus_size_t cmdsize, ctlsize;

	if (pciide_chipen(sc, pa) == 0)
		return;

	aprint_normal("%s: bus-master DMA support present",
	    sc->sc_wdcdev.sc_atac.atac_dev.dv_xname);
	pciide_mapreg_dma(sc, pa);
	aprint_normal("\n");

	sc->sc_wdcdev.sc_atac.atac_cap = ATAC_CAP_DATA16 | ATAC_CAP_DATA32;
	if (sc->sc_dma_ok) {
		sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DMA | ATAC_CAP_UDMA;
		sc->sc_wdcdev.irqack = pciide_irqack;
	}

	sc->sc_wdcdev.sc_atac.atac_pio_cap = 4;
	sc->sc_wdcdev.sc_atac.atac_dma_cap = 2;
	sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
	sc->sc_wdcdev.sc_atac.atac_set_modes = ixp_setup_channel;
	sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanarray;
	sc->sc_wdcdev.sc_atac.atac_nchannels = PCIIDE_NUM_CHANNELS;

	interface = PCI_INTERFACE(pa->pa_class);

	wdc_allocate_regs(&sc->sc_wdcdev);

	for (channel = 0; channel < sc->sc_wdcdev.sc_atac.atac_nchannels;
	    channel++) {
		cp = &sc->pciide_channels[channel];
		if (pciide_chansetup(sc, channel, interface) == 0)
			continue;
		pciide_mapchan(pa, cp, interface, &cmdsize, &ctlsize,
		    pciide_pci_intr);
	}
}

/* Values from linux driver */
static const uint8_t ixp_pio_timings[] = {
	0x5d, 0x47, 0x34, 0x22, 0x20
};

static const uint8_t ixp_mdma_timings[] = {
	0x77, 0x21, 0x20
};

static void
ixp_setup_channel(struct ata_channel *chp)
{
	int drive, s;
	struct pciide_channel *cp = CHAN_TO_PCHAN(chp);
	pcireg_t udma, mdma_timing, pio, pio_timing;
	struct ata_drive_datas *drvp;
	struct pciide_softc *sc = CHAN_TO_PCIIDE(chp);

	pio_timing = pci_conf_read(sc->sc_pc, sc->sc_tag, IXP_PIO_TIMING);
	pio = pci_conf_read(sc->sc_pc, sc->sc_tag, IXP_PIO_CTL);
	mdma_timing = pci_conf_read(sc->sc_pc, sc->sc_tag, IXP_MDMA_TIMING);
	udma = pci_conf_read(sc->sc_pc, sc->sc_tag, IXP_UDMA_CTL);

	pciide_channel_dma_setup(cp);

	for (drive = 0; drive < 2; drive++) {
		drvp = &chp->ch_drive[drive];
		if ((drvp->drive_flags & DRIVE) == 0)
			continue;
		if (drvp->drive_flags & DRIVE_UDMA) {
			s = splbio();
			drvp->drive_flags &= ~DRIVE_DMA;
			splx(s);
			IXP_UDMA_ENABLE(udma, chp->ch_channel, drive);
			IXP_SET_MODE(udma, chp->ch_channel, drive, drvp->UDMA_mode);
		} else if (drvp->drive_flags & DRIVE_DMA) {
			IXP_UDMA_DISABLE(udma, chp->ch_channel, drive);
			IXP_SET_TIMING(mdma_timing, chp->ch_channel, drive,
			    ixp_mdma_timings[drvp->DMA_mode]);
		} else
			IXP_UDMA_DISABLE(udma, chp->ch_channel, drive);

		/*
		 * Set PIO mode and timings
		 * Linux driver avoids PIO mode 1, let's do it too.
		 */
		if (drvp->PIO_mode == 1)
			drvp->PIO_mode = 0;

		IXP_SET_MODE(pio, chp->ch_channel, drive, drvp->PIO_mode);
		IXP_SET_TIMING(pio_timing, chp->ch_channel, drive,
		    ixp_pio_timings[drvp->PIO_mode]);
	}
	pci_conf_write(sc->sc_pc, sc->sc_tag, IXP_UDMA_CTL, udma);
	pci_conf_write(sc->sc_pc, sc->sc_tag, IXP_MDMA_TIMING, mdma_timing);
	pci_conf_write(sc->sc_pc, sc->sc_tag, IXP_PIO_CTL, pio);
	pci_conf_write(sc->sc_pc, sc->sc_tag, IXP_PIO_TIMING, pio_timing);
	ATADEBUG_PRINT(("ixp_setup_channel: udma = %08x, mdma_timing = %08x, pio_mode = %08x,"
	    " pio_timing = %08x\n", udma, mdma_timing, pio, pio_timing), DEBUG_PROBE);
}