/*      $NetBSD: slide.c,v 1.29 2013/10/07 19:51:55 jakllsch Exp $      */

/*-
 * Copyright (c) 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * 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 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: slide.c,v 1.29 2013/10/07 19:51:55 jakllsch 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_sl82c105_reg.h>

static void sl82c105_chip_map(struct pciide_softc*,
    const struct pci_attach_args*);
static void sl82c105_setup_channel(struct ata_channel*);

static int  slide_match(device_t, cfdata_t, void *);
static void slide_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(slide, sizeof(struct pciide_softc),
    slide_match, slide_attach, pciide_detach, NULL);

static const struct pciide_product_desc pciide_symphony_products[] = {
        { PCI_PRODUCT_SYMPHONY_82C105,
          0,
          "Symphony Labs 82C105 IDE controller",
          sl82c105_chip_map,
        },
        { 0,
          0,
          NULL,
          NULL,
        }
};

static const struct pciide_product_desc pciide_winbond_products[] =  {
        { PCI_PRODUCT_WINBOND_W83C553F_1,
          0,
          "Winbond W83C553F IDE controller",
          sl82c105_chip_map,
        },
        { 0,
          0,
          NULL,
          NULL,
        }
};

static int
slide_match(device_t parent, cfdata_t match, void *aux)
{
        struct pci_attach_args *pa = aux;

        if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SYMPHONY) {
                if (pciide_lookup_product(pa->pa_id, pciide_symphony_products))
                        return (2);
        }
        if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_WINBOND) {
                if (pciide_lookup_product(pa->pa_id, pciide_winbond_products))
                        return (2);
        }
        return (0);
}

static void
slide_attach(device_t parent, device_t self, void *aux)
{
        struct pci_attach_args *pa = aux;
        struct pciide_softc *sc = device_private(self);
        const struct pciide_product_desc *pp = NULL;

        sc->sc_wdcdev.sc_atac.atac_dev = self;

        if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SYMPHONY)
                pp = pciide_lookup_product(pa->pa_id, pciide_symphony_products);
        if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_WINBOND)
                pp = pciide_lookup_product(pa->pa_id, pciide_winbond_products);
        if (pp == NULL)
                panic("slide_attach");
        pciide_common_attach(sc, pa, pp);
}

static int
sl82c105_bugchk(const struct pci_attach_args *pa)
{

        if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_WINBOND ||
            PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_WINBOND_W83C553F_0)
                return (0);

        if (PCI_REVISION(pa->pa_class) <= 0x05)
                return (1);

        return (0);
}

static void
sl82c105_chip_map(struct pciide_softc *sc, const struct pci_attach_args *pa)
{
        struct pciide_channel *cp;
        pcireg_t interface, idecr;
        int channel;

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

        aprint_verbose_dev(sc->sc_wdcdev.sc_atac.atac_dev,
            "bus-master DMA support present");

        /*
         * Check to see if we're part of the Winbond 83c553 Southbridge.
         * If so, we need to disable DMA on rev. <= 5 of the southbridge.
         */
        if (pci_find_device(NULL, sl82c105_bugchk)) {
                aprint_verbose(" but disabled due to 83c553 rev. <= 0x05");
                sc->sc_dma_ok = 0;
        } else
                pciide_mapreg_dma(sc, pa);
        aprint_verbose("\n");

        sc->sc_wdcdev.sc_atac.atac_cap = ATAC_CAP_DATA32 | ATAC_CAP_DATA16;
        sc->sc_wdcdev.sc_atac.atac_pio_cap = 4;
        if (sc->sc_dma_ok) {
                sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DMA;
                sc->sc_wdcdev.irqack = pciide_irqack;
                sc->sc_wdcdev.sc_atac.atac_dma_cap = 2;
        }
        sc->sc_wdcdev.sc_atac.atac_set_modes = sl82c105_setup_channel;

        sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanarray;
        sc->sc_wdcdev.sc_atac.atac_nchannels = PCIIDE_NUM_CHANNELS;
        sc->sc_wdcdev.wdc_maxdrives = 2;

        idecr = pci_conf_read(sc->sc_pc, sc->sc_tag, SYMPH_IDECSR);

        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;
                if ((channel == 0 && (idecr & IDECR_P0EN) == 0) ||
                    (channel == 1 && (idecr & IDECR_P1EN) == 0)) {
                        aprint_normal_dev(sc->sc_wdcdev.sc_atac.atac_dev,
                            "%s channel ignored (disabled)\n", cp->name);
                        cp->ata_channel.ch_flags |= ATACH_DISABLED;
                        continue;
                }
                pciide_mapchan(pa, cp, interface, pciide_pci_intr);
        }
}

static void
sl82c105_setup_channel(struct ata_channel *chp)
{
        struct ata_drive_datas *drvp;
        struct pciide_channel *cp = CHAN_TO_PCHAN(chp);
        struct pciide_softc *sc = CHAN_TO_PCIIDE(chp);
        int pxdx_reg, drive, s;
        pcireg_t pxdx;

        /* Set up DMA if needed. */
        pciide_channel_dma_setup(cp);

        for (drive = 0; drive < 2; drive++) {
                pxdx_reg = ((chp->ch_channel == 0) ? SYMPH_P0D0CR
                                                   : SYMPH_P1D0CR) +
                            (drive * 4);

                pxdx = pci_conf_read(sc->sc_pc, sc->sc_tag, pxdx_reg);

                pxdx &= ~(PxDx_CMD_ON_MASK|PxDx_CMD_OFF_MASK);
                pxdx &= ~(PxDx_PWEN|PxDx_RDYEN|PxDx_RAEN);

                drvp = &chp->ch_drive[drive];
                /* If no drive, skip. */
                if (drvp->drive_type == ATA_DRIVET_NONE) {
                        pci_conf_write(sc->sc_pc, sc->sc_tag, pxdx_reg, pxdx);
                        continue;
                }

                if (drvp->drive_flags & ATA_DRIVE_DMA) {
                        /*
                         * Timings will be used for both PIO and DMA,
                         * so adjust DMA mode if needed.
                         */
                        if (drvp->PIO_mode >= 3) {
                                if ((drvp->DMA_mode + 2) > drvp->PIO_mode)
                                        drvp->DMA_mode = drvp->PIO_mode - 2;
                                if (drvp->DMA_mode < 1) {
                                        /*
                                         * Can't mix both PIO and DMA.
                                         * Disable DMA.
                                         */
                                        s = splbio();
                                        drvp->drive_flags &= ~ATA_DRIVE_DMA;
                                        splx(s);
                                }
                        } else {
                                /*
                                 * Can't mix both PIO and DMA.  Disable
                                 * DMA.
                                 */
                                s = splbio();
                                drvp->drive_flags &= ~ATA_DRIVE_DMA;
                                splx(s);
                        }
                }

                if (drvp->drive_flags & ATA_DRIVE_DMA) {
                        /* Use multi-word DMA. */
                        pxdx |= symph_mw_dma_times[drvp->DMA_mode].cmd_on <<
                            PxDx_CMD_ON_SHIFT;
                        pxdx |= symph_mw_dma_times[drvp->DMA_mode].cmd_off;
                } else {
                        pxdx |= symph_pio_times[drvp->PIO_mode].cmd_on <<
                            PxDx_CMD_ON_SHIFT;
                        pxdx |= symph_pio_times[drvp->PIO_mode].cmd_off;
                }

                /* XXX PxDx_PWEN? PxDx_RDYEN? PxDx_RAEN? */

                /* ...and set the mode for this drive. */
                pci_conf_write(sc->sc_pc, sc->sc_tag, pxdx_reg, pxdx);
        }
}