LXR linux/drivers/ata/pata

   1/*
   2 * pata_ninja32.c       - Ninja32 PATA for new ATA layer
   3 *                        (C) 2007 Red Hat Inc
   4 *
   5 * Note: The controller like many controllers has shared timings for
   6 * PIO and DMA. We thus flip to the DMA timings in dma_start and flip back
   7 * in the dma_stop function. Thus we actually don't need a set_dmamode
   8 * method as the PIO method is always called and will set the right PIO
   9 * timing parameters.
  10 *
  11 * The Ninja32 Cardbus is not a generic SFF controller. Instead it is
  12 * laid out as follows off BAR 0. This is based upon Mark Lord's delkin
  13 * driver and the extensive analysis done by the BSD developers, notably
  14 * ITOH Yasufumi.
  15 *
  16 *      Base + 0x00 IRQ Status
  17 *      Base + 0x01 IRQ control
  18 *      Base + 0x02 Chipset control
  19 *      Base + 0x03 Unknown
  20 *      Base + 0x04 VDMA and reset control + wait bits
  21 *      Base + 0x08 BMIMBA
  22 *      Base + 0x0C DMA Length
  23 *      Base + 0x10 Taskfile
  24 *      Base + 0x18 BMDMA Status ?
  25 *      Base + 0x1C
  26 *      Base + 0x1D Bus master control
  27 *              bit 0 = enable
  28 *              bit 1 = 0 write/1 read
  29 *              bit 2 = 1 sgtable
  30 *              bit 3 = go
  31 *              bit 4-6 wait bits
  32 *              bit 7 = done
  33 *      Base + 0x1E AltStatus
  34 *      Base + 0x1F timing register
  35 */
  36
  37#include <linux/kernel.h>
  38#include <linux/module.h>
  39#include <linux/pci.h>
  40#include <linux/blkdev.h>
  41#include <linux/delay.h>
  42#include <scsi/scsi_host.h>
  43#include <linux/libata.h>
  44
  45#define DRV_NAME "pata_ninja32"
  46#define DRV_VERSION "0.1.5"
  47
  48
  49/**
  50 *      ninja32_set_piomode     -       set initial PIO mode data
  51 *      @ap: ATA interface
  52 *      @adev: ATA device
  53 *
  54 *      Called to do the PIO mode setup. Our timing registers are shared
  55 *      but we want to set the PIO timing by default.
  56 */
  57
  58static void ninja32_set_piomode(struct ata_port *ap, struct ata_device *adev)
  59{
  60        static u16 pio_timing[5] = {
  61                0xd6, 0x85, 0x44, 0x33, 0x13
  62        };
  63        iowrite8(pio_timing[adev->pio_mode - XFER_PIO_0],
  64                 ap->ioaddr.bmdma_addr + 0x1f);
  65        ap->private_data = adev;
  66}
  67
  68
  69static void ninja32_dev_select(struct ata_port *ap, unsigned int device)
  70{
  71        struct ata_device *adev = &ap->link.device[device];
  72        if (ap->private_data != adev) {
  73                iowrite8(0xd6, ap->ioaddr.bmdma_addr + 0x1f);
  74                ata_sff_dev_select(ap, device);
  75                ninja32_set_piomode(ap, adev);
  76        }
  77}
  78
  79static struct scsi_host_template ninja32_sht = {
  80        ATA_BMDMA_SHT(DRV_NAME),
  81};
  82
  83static struct ata_port_operations ninja32_port_ops = {
  84        .inherits       = &ata_bmdma_port_ops,
  85        .sff_dev_select = ninja32_dev_select,
  86        .cable_detect   = ata_cable_40wire,
  87        .set_piomode    = ninja32_set_piomode,
  88        .sff_data_xfer  = ata_sff_data_xfer32
  89};
  90
  91static void ninja32_program(void __iomem *base)
  92{
  93        iowrite8(0x05, base + 0x01);    /* Enable interrupt lines */
  94        iowrite8(0xBE, base + 0x02);    /* Burst, ?? setup */
  95        iowrite8(0x01, base + 0x03);    /* Unknown */
  96        iowrite8(0x20, base + 0x04);    /* WAIT0 */
  97        iowrite8(0x8f, base + 0x05);    /* Unknown */
  98        iowrite8(0xa4, base + 0x1c);    /* Unknown */
  99        iowrite8(0x83, base + 0x1d);    /* BMDMA control: WAIT0 */
 100}
 101
 102static int ninja32_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 103{
 104        struct ata_host *host;
 105        struct ata_port *ap;
 106        void __iomem *base;
 107        int rc;
 108
 109        host = ata_host_alloc(&dev->dev, 1);
 110        if (!host)
 111                return -ENOMEM;
 112        ap = host->ports[0];
 113
 114        /* Set up the PCI device */
 115        rc = pcim_enable_device(dev);
 116        if (rc)
 117                return rc;
 118        rc = pcim_iomap_regions(dev, 1 << 0, DRV_NAME);
 119        if (rc == -EBUSY)
 120                pcim_pin_device(dev);
 121        if (rc)
 122                return rc;
 123
 124        host->iomap = pcim_iomap_table(dev);
 125        rc = dma_set_mask(&dev->dev, ATA_DMA_MASK);
 126        if (rc)
 127                return rc;
 128        rc = dma_set_coherent_mask(&dev->dev, ATA_DMA_MASK);
 129        if (rc)
 130                return rc;
 131        pci_set_master(dev);
 132
 133        /* Set up the register mappings. We use the I/O mapping as only the
 134           older chips also have MMIO on BAR 1 */
 135        base = host->iomap[0];
 136        if (!base)
 137                return -ENOMEM;
 138        ap->ops = &ninja32_port_ops;
 139        ap->pio_mask = ATA_PIO4;
 140        ap->flags |= ATA_FLAG_SLAVE_POSS;
 141
 142        ap->ioaddr.cmd_addr = base + 0x10;
 143        ap->ioaddr.ctl_addr = base + 0x1E;
 144        ap->ioaddr.altstatus_addr = base + 0x1E;
 145        ap->ioaddr.bmdma_addr = base;
 146        ata_sff_std_ports(&ap->ioaddr);
 147        ap->pflags = ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
 148
 149        ninja32_program(base);
 150        /* FIXME: Should we disable them at remove ? */
 151        return ata_host_activate(host, dev->irq, ata_bmdma_interrupt,
 152                                 IRQF_SHARED, &ninja32_sht);
 153}
 154
 155#ifdef CONFIG_PM_SLEEP
 156static int ninja32_reinit_one(struct pci_dev *pdev)
 157{
 158        struct ata_host *host = pci_get_drvdata(pdev);
 159        int rc;
 160
 161        rc = ata_pci_device_do_resume(pdev);
 162        if (rc)
 163                return rc;
 164        ninja32_program(host->iomap[0]);
 165        ata_host_resume(host);
 166        return 0;
 167}
 168#endif
 169
 170static const struct pci_device_id ninja32[] = {
 171        { 0x10FC, 0x0003, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 172        { 0x1145, 0x8008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 173        { 0x1145, 0xf008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 174        { 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 175        { 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 176        { 0x1145, 0xf02C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 177        { },
 178};
 179
 180static struct pci_driver ninja32_pci_driver = {
 181        .name           = DRV_NAME,
 182        .id_table       = ninja32,
 183        .probe          = ninja32_init_one,
 184        .remove         = ata_pci_remove_one,
 185#ifdef CONFIG_PM_SLEEP
 186        .suspend        = ata_pci_device_suspend,
 187        .resume         = ninja32_reinit_one,
 188#endif
 189};
 190
 191module_pci_driver(ninja32_pci_driver);
 192
 193MODULE_AUTHOR("Alan Cox");
 194MODULE_DESCRIPTION("low-level driver for Ninja32 ATA");
 195MODULE_LICENSE("GPL");
 196MODULE_DEVICE_TABLE(pci, ninja32);
 197MODULE_VERSION(DRV_VERSION);
 198