pata_marvell.c

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/*
 *  Marvell PATA driver.
 *
 *  For the moment we drive the PATA port in legacy mode. That
 *  isn't making full use of the device functionality but it is
 *  easy to get working.
 *
 *  (c) 2006 Red Hat
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/ata.h>

#define DRV_NAME    "pata_marvell"
#define DRV_VERSION "0.1.6"

static int marvell_pata_active(struct pci_dev *pdev)
{
    int i;
    u32 devices;
    void __iomem *barp;

    /* We don't yet know how to do this for other devices */
    if (pdev->device != 0x6145)
        return 1;

    barp = pci_iomap(pdev, 5, 0x10);
    if (barp == NULL)
        return -ENOMEM;

    printk("BAR5:");
    for(i = 0; i <= 0x0F; i++)
        printk("%02X:%02X ", i, ioread8(barp + i));
    printk("\n");

    devices = ioread32(barp + 0x0C);
    pci_iounmap(pdev, barp);

    if (devices & 0x10)
        return 1;
    return 0;
}

static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
{
    struct ata_port *ap = link->ap;
    struct pci_dev *pdev = to_pci_dev(ap->host->dev);

    if (pdev->device == 0x6145 && ap->port_no == 0 &&
        !marvell_pata_active(pdev)) /* PATA enable ? */
            return -ENOENT;

    return ata_sff_prereset(link, deadline);
}

static int marvell_cable_detect(struct ata_port *ap)
{
    /* Cable type */
    switch(ap->port_no)
    {
    case 0:
        if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
            return ATA_CBL_PATA40;
        return ATA_CBL_PATA80;
    case 1: /* Legacy SATA port */
        return ATA_CBL_SATA;
    }

    BUG();
    return 0;   /* Our BUG macro needs the right markup */
}

/* No PIO or DMA methods needed for this device */

static struct scsi_host_template marvell_sht = {
    ATA_BMDMA_SHT(DRV_NAME),
};

static struct ata_port_operations marvell_ops = {
    .inherits       = &ata_bmdma_port_ops,
    .cable_detect       = marvell_cable_detect,
    .prereset       = marvell_pre_reset,
};


static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
{
    static const struct ata_port_info info = {
        .flags      = ATA_FLAG_SLAVE_POSS,

        .pio_mask   = ATA_PIO4,
        .mwdma_mask = ATA_MWDMA2,
        .udma_mask  = ATA_UDMA5,

        .port_ops   = &marvell_ops,
    };
    static const struct ata_port_info info_sata = {
        /* Slave possible as its magically mapped not real */
        .flags      = ATA_FLAG_SLAVE_POSS,

        .pio_mask   = ATA_PIO4,
        .mwdma_mask = ATA_MWDMA2,
        .udma_mask  = ATA_UDMA6,

        .port_ops   = &marvell_ops,
    };
    const struct ata_port_info *ppi[] = { &info, &info_sata };

    if (pdev->device == 0x6101)
        ppi[1] = &ata_dummy_port_info;

#if defined(CONFIG_SATA_AHCI) || defined(CONFIG_SATA_AHCI_MODULE)
    if (!marvell_pata_active(pdev)) {
        printk(KERN_INFO DRV_NAME ": PATA port not active, deferring to AHCI driver.\n");
        return -ENODEV;
    }
#endif
    return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0);
}

static const struct pci_device_id marvell_pci_tbl[] = {
    { PCI_DEVICE(0x11AB, 0x6101), },
    { PCI_DEVICE(0x11AB, 0x6121), },
    { PCI_DEVICE(0x11AB, 0x6123), },
    { PCI_DEVICE(0x11AB, 0x6145), },
    { PCI_DEVICE(0x1B4B, 0x91A0), },
    { PCI_DEVICE(0x1B4B, 0x91A4), },

    { } /* terminate list */
};

static struct pci_driver marvell_pci_driver = {
    .name           = DRV_NAME,
    .id_table       = marvell_pci_tbl,
    .probe          = marvell_init_one,
    .remove         = ata_pci_remove_one,
#ifdef CONFIG_PM
    .suspend        = ata_pci_device_suspend,
    .resume         = ata_pci_device_resume,
#endif
};

module_pci_driver(marvell_pci_driver);

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
MODULE_VERSION(DRV_VERSION);