pata_hpt3x3.c

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/*
 *  pata_hpt3x3     -   HPT3x3 driver
 *  (c) Copyright 2005-2006 Red Hat
 *
 *  Was pata_hpt34x but the naming was confusing as it supported the
 *  343 and 363 so it has been renamed.
 *
 *  Based on:
 *  linux/drivers/ide/pci/hpt34x.c      Version 0.40    Sept 10, 2002
 *  Copyright (C) 1998-2000 Andre Hedrick <[email protected]>
 *
 *  May be copied or modified under the terms of the GNU General Public
 *  License
 */

#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 <scsi/scsi_host.h>
#include <linux/libata.h>

#define DRV_NAME    "pata_hpt3x3"
#define DRV_VERSION "0.6.1"

static void hpt3x3_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
    struct pci_dev *pdev = to_pci_dev(ap->host->dev);
    u32 r1, r2;
    int dn = 2 * ap->port_no + adev->devno;

    pci_read_config_dword(pdev, 0x44, &r1);
    pci_read_config_dword(pdev, 0x48, &r2);
    /* Load the PIO timing number */
    r1 &= ~(7 << (3 * dn));
    r1 |= (adev->pio_mode - XFER_PIO_0) << (3 * dn);
    r2 &= ~(0x11 << dn);    /* Clear MWDMA and UDMA bits */

    pci_write_config_dword(pdev, 0x44, r1);
    pci_write_config_dword(pdev, 0x48, r2);
}

#if defined(CONFIG_PATA_HPT3X3_DMA)

static void hpt3x3_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
    struct pci_dev *pdev = to_pci_dev(ap->host->dev);
    u32 r1, r2;
    int dn = 2 * ap->port_no + adev->devno;
    int mode_num = adev->dma_mode & 0x0F;

    pci_read_config_dword(pdev, 0x44, &r1);
    pci_read_config_dword(pdev, 0x48, &r2);
    /* Load the timing number */
    r1 &= ~(7 << (3 * dn));
    r1 |= (mode_num << (3 * dn));
    r2 &= ~(0x11 << dn);    /* Clear MWDMA and UDMA bits */

    if (adev->dma_mode >= XFER_UDMA_0)
        r2 |= (0x01 << dn); /* Ultra mode */
    else
        r2 |= (0x10 << dn); /* MWDMA */

    pci_write_config_dword(pdev, 0x44, r1);
    pci_write_config_dword(pdev, 0x48, r2);
}

static void hpt3x3_freeze(struct ata_port *ap)
{
    void __iomem *mmio = ap->ioaddr.bmdma_addr;

    iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ ATA_DMA_START,
            mmio + ATA_DMA_CMD);
    ata_sff_dma_pause(ap);
    ata_sff_freeze(ap);
}

static void hpt3x3_bmdma_setup(struct ata_queued_cmd *qc)
{
    struct ata_port *ap = qc->ap;
    u8 r = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
    r |= ATA_DMA_INTR | ATA_DMA_ERR;
    iowrite8(r, ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
    return ata_bmdma_setup(qc);
}

static int hpt3x3_atapi_dma(struct ata_queued_cmd *qc)
{
    return 1;
}

#endif /* CONFIG_PATA_HPT3X3_DMA */

static struct scsi_host_template hpt3x3_sht = {
    ATA_BMDMA_SHT(DRV_NAME),
};

static struct ata_port_operations hpt3x3_port_ops = {
    .inherits   = &ata_bmdma_port_ops,
    .cable_detect   = ata_cable_40wire,
    .set_piomode    = hpt3x3_set_piomode,
#if defined(CONFIG_PATA_HPT3X3_DMA)
    .set_dmamode    = hpt3x3_set_dmamode,
    .bmdma_setup    = hpt3x3_bmdma_setup,
    .check_atapi_dma= hpt3x3_atapi_dma,
    .freeze     = hpt3x3_freeze,
#endif

};

static void hpt3x3_init_chipset(struct pci_dev *dev)
{
    u16 cmd;
    /* Initialize the board */
    pci_write_config_word(dev, 0x80, 0x00);
    /* Check if it is a 343 or a 363. 363 has COMMAND_MEMORY set */
    pci_read_config_word(dev, PCI_COMMAND, &cmd);
    if (cmd & PCI_COMMAND_MEMORY)
        pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
    else
        pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
}

static int hpt3x3_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,
#if defined(CONFIG_PATA_HPT3X3_DMA)
        /* Further debug needed */
        .mwdma_mask = ATA_MWDMA2,
        .udma_mask = ATA_UDMA2,
#endif
        .port_ops = &hpt3x3_port_ops
    };
    /* Register offsets of taskfiles in BAR4 area */
    static const u8 offset_cmd[2] = { 0x20, 0x28 };
    static const u8 offset_ctl[2] = { 0x36, 0x3E };
    const struct ata_port_info *ppi[] = { &info, NULL };
    struct ata_host *host;
    int i, rc;
    void __iomem *base;

    hpt3x3_init_chipset(pdev);

    ata_print_version_once(&pdev->dev, DRV_VERSION);

    host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
    if (!host)
        return -ENOMEM;
    /* acquire resources and fill host */
    rc = pcim_enable_device(pdev);
    if (rc)
        return rc;

    /* Everything is relative to BAR4 if we set up this way */
    rc = pcim_iomap_regions(pdev, 1 << 4, DRV_NAME);
    if (rc == -EBUSY)
        pcim_pin_device(pdev);
    if (rc)
        return rc;
    host->iomap = pcim_iomap_table(pdev);
    rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
    if (rc)
        return rc;
    rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
    if (rc)
        return rc;

    base = host->iomap[4];  /* Bus mastering base */

    for (i = 0; i < host->n_ports; i++) {
        struct ata_port *ap = host->ports[i];
        struct ata_ioports *ioaddr = &ap->ioaddr;

        ioaddr->cmd_addr = base + offset_cmd[i];
        ioaddr->altstatus_addr =
        ioaddr->ctl_addr = base + offset_ctl[i];
        ioaddr->scr_addr = NULL;
        ata_sff_std_ports(ioaddr);
        ioaddr->bmdma_addr = base + 8 * i;

        ata_port_pbar_desc(ap, 4, -1, "ioport");
        ata_port_pbar_desc(ap, 4, offset_cmd[i], "cmd");
    }
    pci_set_master(pdev);
    return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
                 IRQF_SHARED, &hpt3x3_sht);
}

#ifdef CONFIG_PM
static int hpt3x3_reinit_one(struct pci_dev *dev)
{
    struct ata_host *host = dev_get_drvdata(&dev->dev);
    int rc;

    rc = ata_pci_device_do_resume(dev);
    if (rc)
        return rc;

    hpt3x3_init_chipset(dev);

    ata_host_resume(host);
    return 0;
}
#endif

static const struct pci_device_id hpt3x3[] = {
    { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT343), },

    { },
};

static struct pci_driver hpt3x3_pci_driver = {
    .name       = DRV_NAME,
    .id_table   = hpt3x3,
    .probe      = hpt3x3_init_one,
    .remove     = ata_pci_remove_one,
#ifdef CONFIG_PM
    .suspend    = ata_pci_device_suspend,
    .resume     = hpt3x3_reinit_one,
#endif
};

module_pci_driver(hpt3x3_pci_driver);

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for the Highpoint HPT343/363");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, hpt3x3);
MODULE_VERSION(DRV_VERSION);