/*-
 * Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
 * 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,
 *    without modification, immediately at the beginning of the file.
 * 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 ``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 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.
 */

/* local prototypes */
static int ata_acard_chipinit(device_t dev);
static int ata_acard_allocate(device_t dev);
static int ata_acard_status(device_t dev);
static void ata_acard_850_setmode(device_t dev, int mode);
static void ata_acard_86X_setmode(device_t dev, int mode);

static int ata_serialize(device_t dev, int flags);

/* misc defines */
#define ATP_OLD         1

/*
 * Acard chipset support functions
 */
int
ata_acard_ident(device_t dev)
{
    struct ata_pci_controller *ctlr = device_get_softc(dev);
    static const struct ata_chip_id ids[] =
    {{ ATA_ATP850R, 0, ATP_OLD, 0x00, ATA_UDMA2, "ATP850" },
     { ATA_ATP860A, 0, 0,       0x00, ATA_UDMA4, "ATP860A" },
     { ATA_ATP860R, 0, 0,       0x00, ATA_UDMA4, "ATP860R" },
     { ATA_ATP865A, 0, 0,       0x00, ATA_UDMA6, "ATP865A" },
     { ATA_ATP865R, 0, 0,       0x00, ATA_UDMA6, "ATP865R" },
     { 0, 0, 0, 0, 0, 0}};

    if (pci_get_vendor(dev) != ATA_ACARD_ID)
        return ENXIO;

    if (!(ctlr->chip = ata_match_chip(dev, ids)))
        return ENXIO;

    ata_set_desc(dev);
    ctlr->chipinit = ata_acard_chipinit;
    return 0;
}

static int
ata_acard_chipinit(device_t dev)
{
    struct ata_pci_controller *ctlr = device_get_softc(dev);

    if (ata_setup_interrupt(dev, ata_generic_intr))
        return ENXIO;

    ctlr->allocate = ata_acard_allocate;
    if (ctlr->chip->cfg1 == ATP_OLD) {
        ctlr->setmode = ata_acard_850_setmode;
        ctlr->locking = ata_serialize;
    }
    else
        ctlr->setmode = ata_acard_86X_setmode;
    return 0;
}

static int
ata_acard_allocate(device_t dev)
{
    struct ata_channel *ch = device_get_softc(dev);

    /* setup the usual register normal pci style */
    if (ata_pci_allocate(dev))
        return ENXIO;

    ch->hw.status = ata_acard_status;
    return 0;
}

static int
ata_acard_status(device_t dev)
{
    struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
    struct ata_channel *ch = device_get_softc(dev);

    if (ctlr->chip->cfg1 == ATP_OLD &&
        ATA_LOCKING(ch->dev, ATA_LF_WHICH) != ch->unit)
            return 0;
    if (ch->dma && (ch->dma->flags & ATA_DMA_ACTIVE)) {
        int bmstat = ATA_IDX_INB(ch, ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;

        if ((bmstat & (ATA_BMSTAT_ACTIVE | ATA_BMSTAT_INTERRUPT)) !=
            ATA_BMSTAT_INTERRUPT)
            return 0;
        ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, bmstat & ~ATA_BMSTAT_ERROR);
        DELAY(1);
        ATA_IDX_OUTB(ch, ATA_BMCMD_PORT,
                     ATA_IDX_INB(ch, ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
        DELAY(1);
    }
    if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) {
        DELAY(100);
        if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY)
            return 0;
    }
    return 1;
}

static void
ata_acard_850_setmode(device_t dev, int mode)
{
    device_t gparent = GRANDPARENT(dev);
    struct ata_pci_controller *ctlr = device_get_softc(gparent);
    struct ata_channel *ch = device_get_softc(device_get_parent(dev));
    struct ata_device *atadev = device_get_softc(dev);
    int devno = (ch->unit << 1) + atadev->unit;
    int error;

    mode = ata_limit_mode(dev, mode,
                          ata_atapi(dev) ? ATA_PIO_MAX : ctlr->chip->max_dma);

    /* XXX SOS missing WDMA0+1 + PIO modes */
    if (mode >= ATA_WDMA2) {
        error = ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_SETXFER, 0, mode);
        if (bootverbose)
            device_printf(dev, "%ssetting %s on %s chip\n",
                          (error) ? "FAILURE " : "",
                          ata_mode2str(mode), ctlr->chip->text);
        if (!error) {
            u_int8_t reg54 = pci_read_config(gparent, 0x54, 1);

            reg54 &= ~(0x03 << (devno << 1));
            if (mode >= ATA_UDMA0)
                reg54 |= (((mode & ATA_MODE_MASK) + 1) << (devno << 1));
            pci_write_config(gparent, 0x54, reg54, 1);
            pci_write_config(gparent, 0x4a, 0xa6, 1);
            pci_write_config(gparent, 0x40 + (devno << 1), 0x0301, 2);
            atadev->mode = mode;
            return;
        }
    }
    /* we could set PIO mode timings, but we assume the BIOS did that */
}

static void
ata_acard_86X_setmode(device_t dev, int mode)
{
    device_t gparent = GRANDPARENT(dev);
    struct ata_pci_controller *ctlr = device_get_softc(gparent);
    struct ata_channel *ch = device_get_softc(device_get_parent(dev));
    struct ata_device *atadev = device_get_softc(dev);
    int devno = (ch->unit << 1) + atadev->unit;
    int error;


    mode = ata_limit_mode(dev, mode,
                          ata_atapi(dev) ? ATA_PIO_MAX : ctlr->chip->max_dma);

    mode = ata_check_80pin(dev, mode);

    /* XXX SOS missing WDMA0+1 + PIO modes */
    if (mode >= ATA_WDMA2) {
        error = ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_SETXFER, 0, mode);
        if (bootverbose)
            device_printf(dev, "%ssetting %s on %s chip\n",
                          (error) ? "FAILURE " : "",
                          ata_mode2str(mode), ctlr->chip->text);
        if (!error) {
            u_int16_t reg44 = pci_read_config(gparent, 0x44, 2);

            reg44 &= ~(0x000f << (devno << 2));
            if (mode >= ATA_UDMA0)
                reg44 |= (((mode & ATA_MODE_MASK) + 1) << (devno << 2));
            pci_write_config(gparent, 0x44, reg44, 2);
            pci_write_config(gparent, 0x4a, 0xa6, 1);
            pci_write_config(gparent, 0x40 + devno, 0x31, 1);
            atadev->mode = mode;
            return;
        }
    }
    /* we could set PIO mode timings, but we assume the BIOS did that */
}

struct ata_serialize {
    struct lock         locked_mtx;
    int                 locked_ch;
    int                 restart_ch;
};

static int
ata_serialize(device_t dev, int flags)
{
    struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
    struct ata_channel *ch = device_get_softc(dev);
    struct ata_serialize *serial;
    static int inited = 0;
    int res;

    if (!inited) {
        serial = kmalloc(sizeof(struct ata_serialize),
                              M_TEMP, M_INTWAIT | M_ZERO);
        lockinit(&serial->locked_mtx, "ataserialize", 0, 0);
        serial->locked_ch = -1;
        serial->restart_ch = -1;
        device_set_ivars(ctlr->dev, serial);
        inited = 1;
    }
    else
        serial = device_get_ivars(ctlr->dev);

    lockmgr(&serial->locked_mtx, LK_EXCLUSIVE);
    switch (flags) {
    case ATA_LF_LOCK:
        if (serial->locked_ch == -1)
            serial->locked_ch = ch->unit;
        if (serial->locked_ch != ch->unit)
            serial->restart_ch = ch->unit;
        break;

    case ATA_LF_UNLOCK:
        if (serial->locked_ch == ch->unit) {
            serial->locked_ch = -1;
            if (serial->restart_ch != -1) {
                if ((ch = ctlr->interrupt[serial->restart_ch].argument)) {
                    serial->restart_ch = -1;
                    lockmgr(&serial->locked_mtx, LK_RELEASE);
                    ata_start(ch->dev);
                    return -1;
                }
            }
        }
        break;

    case ATA_LF_WHICH:
        break;
    }
    res = serial->locked_ch;
    lockmgr(&serial->locked_mtx, LK_RELEASE);
    return res;
}