LXR linux/drivers/ata/pata

   1/*
   2 *  pata_piccolo.c - Toshiba Piccolo PATA/SATA controller driver.
   3 *
   4 *  This is basically an update to ata_generic.c to add Toshiba Piccolo support
   5 *  then split out to keep ata_generic "clean".
   6 *
   7 *  Copyright 2005 Red Hat Inc, all rights reserved.
   8 *
   9 *  Elements from ide/pci/generic.c
  10 *          Copyright (C) 2001-2002     Andre Hedrick <andre@linux-ide.org>
  11 *          Portions (C) Copyright 2002  Red Hat Inc <alan@redhat.com>
  12 *
  13 *  May be copied or modified under the terms of the GNU General Public License
  14 *
  15 *  The timing data tables/programming info are courtesy of the NetBSD driver
  16 */
  17
  18#include <linux/kernel.h>
  19#include <linux/module.h>
  20#include <linux/pci.h>
  21#include <linux/blkdev.h>
  22#include <linux/delay.h>
  23#include <scsi/scsi_host.h>
  24#include <linux/libata.h>
  25
  26#define DRV_NAME "pata_piccolo"
  27#define DRV_VERSION "0.0.1"
  28
  29
  30
  31static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev)
  32{
  33        static const u16 pio[6] = {     /* For reg 0x50 low word & E088 */
  34                0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100
  35        };
  36        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  37        u16 conf;
  38        pci_read_config_word(pdev, 0x50, &conf);
  39        conf &= 0xE088;
  40        conf |= pio[adev->pio_mode - XFER_PIO_0];
  41        pci_write_config_word(pdev, 0x50, conf);
  42}
  43
  44static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  45{
  46        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  47        u32 conf;
  48        pci_read_config_dword(pdev, 0x5C, &conf);
  49        conf &= 0x78FFE088;     /* Keep the other bits */
  50        if (adev->dma_mode >= XFER_UDMA_0) {
  51                int udma = adev->dma_mode - XFER_UDMA_0;
  52                conf |= 0x80000000;
  53                conf |= (udma + 2) << 28;
  54                conf |= (2 - udma) * 0x111;     /* spread into three nibbles */
  55        } else {
  56                static const u32 mwdma[4] = {
  57                        0x0655, 0x0200, 0x0200, 0x0100
  58                };
  59                conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0];
  60        }
  61        pci_write_config_dword(pdev, 0x5C, conf);
  62}
  63
  64
  65static struct scsi_host_template tosh_sht = {
  66        ATA_BMDMA_SHT(DRV_NAME),
  67};
  68
  69static struct ata_port_operations tosh_port_ops = {
  70        .inherits       = &ata_bmdma_port_ops,
  71        .cable_detect   = ata_cable_unknown,
  72        .set_piomode    = tosh_set_piomode,
  73        .set_dmamode    = tosh_set_dmamode
  74};
  75
  76/**
  77 *      ata_tosh_init           -       attach generic IDE
  78 *      @dev: PCI device found
  79 *      @id: match entry
  80 *
  81 *      Called each time a matching IDE interface is found. We check if the
  82 *      interface is one we wish to claim and if so we perform any chip
  83 *      specific hacks then let the ATA layer do the heavy lifting.
  84 */
  85
  86static int ata_tosh_init_one(struct pci_dev *dev, const struct pci_device_id *id)
  87{
  88        static const struct ata_port_info info = {
  89                .flags = ATA_FLAG_SLAVE_POSS,
  90                .pio_mask = ATA_PIO5,
  91                .mwdma_mask = ATA_MWDMA2,
  92                .udma_mask = ATA_UDMA2,
  93                .port_ops = &tosh_port_ops
  94        };
  95        const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
  96        /* Just one port for the moment */
  97        return ata_pci_bmdma_init_one(dev, ppi, &tosh_sht, NULL, 0);
  98}
  99
 100static struct pci_device_id ata_tosh[] = {
 101        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
 102        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
 103        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3),  },
 104        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5),  },
 105        { 0, },
 106};
 107
 108static struct pci_driver ata_tosh_pci_driver = {
 109        .name           = DRV_NAME,
 110        .id_table       = ata_tosh,
 111        .probe          = ata_tosh_init_one,
 112        .remove         = ata_pci_remove_one,
 113#ifdef CONFIG_PM
 114        .suspend        = ata_pci_device_suspend,
 115        .resume         = ata_pci_device_resume,
 116#endif
 117};
 118
 119module_pci_driver(ata_tosh_pci_driver);
 120
 121MODULE_AUTHOR("Alan Cox");
 122MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
 123MODULE_LICENSE("GPL");
 124MODULE_DEVICE_TABLE(pci, ata_tosh);
 125MODULE_VERSION(DRV_VERSION);
 126