linux/drivers/ata/pata_piccolo.c
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   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/init.h>
  22#include <linux/blkdev.h>
  23#include <linux/delay.h>
  24#include <scsi/scsi_host.h>
  25#include <linux/libata.h>
  26
  27#define DRV_NAME "pata_piccolo"
  28#define DRV_VERSION "0.0.1"
  29
  30
  31
  32static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev)
  33{
  34        static const u16 pio[6] = {     /* For reg 0x50 low word & E088 */
  35                0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100
  36        };
  37        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  38        u16 conf;
  39        pci_read_config_word(pdev, 0x50, &conf);
  40        conf &= 0xE088;
  41        conf |= pio[adev->pio_mode - XFER_PIO_0];
  42        pci_write_config_word(pdev, 0x50, conf);
  43}
  44
  45static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  46{
  47        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  48        u32 conf;
  49        pci_read_config_dword(pdev, 0x5C, &conf);
  50        conf &= 0x78FFE088;     /* Keep the other bits */
  51        if (adev->dma_mode >= XFER_UDMA_0) {
  52                int udma = adev->dma_mode - XFER_UDMA_0;
  53                conf |= 0x80000000;
  54                conf |= (udma + 2) << 28;
  55                conf |= (2 - udma) * 0x111;     /* spread into three nibbles */
  56        } else {
  57                static const u32 mwdma[4] = {
  58                        0x0655, 0x0200, 0x0200, 0x0100
  59                };
  60                conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0];
  61        }
  62        pci_write_config_dword(pdev, 0x5C, conf);
  63}
  64
  65
  66static struct scsi_host_template tosh_sht = {
  67        ATA_BMDMA_SHT(DRV_NAME),
  68};
  69
  70static struct ata_port_operations tosh_port_ops = {
  71        .inherits       = &ata_bmdma_port_ops,
  72        .cable_detect   = ata_cable_unknown,
  73        .set_piomode    = tosh_set_piomode,
  74        .set_dmamode    = tosh_set_dmamode
  75};
  76
  77/**
  78 *      ata_tosh_init           -       attach generic IDE
  79 *      @dev: PCI device found
  80 *      @id: match entry
  81 *
  82 *      Called each time a matching IDE interface is found. We check if the
  83 *      interface is one we wish to claim and if so we perform any chip
  84 *      specific hacks then let the ATA layer do the heavy lifting.
  85 */
  86
  87static int ata_tosh_init_one(struct pci_dev *dev, const struct pci_device_id *id)
  88{
  89        static const struct ata_port_info info = {
  90                .flags = ATA_FLAG_SLAVE_POSS,
  91                .pio_mask = ATA_PIO5,
  92                .mwdma_mask = ATA_MWDMA2,
  93                .udma_mask = ATA_UDMA2,
  94                .port_ops = &tosh_port_ops
  95        };
  96        const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
  97        /* Just one port for the moment */
  98        return ata_pci_bmdma_init_one(dev, ppi, &tosh_sht, NULL, 0);
  99}
 100
 101static struct pci_device_id ata_tosh[] = {
 102        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
 103        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
 104        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3),  },
 105        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5),  },
 106        { 0, },
 107};
 108
 109static struct pci_driver ata_tosh_pci_driver = {
 110        .name           = DRV_NAME,
 111        .id_table       = ata_tosh,
 112        .probe          = ata_tosh_init_one,
 113        .remove         = ata_pci_remove_one,
 114#ifdef CONFIG_PM
 115        .suspend        = ata_pci_device_suspend,
 116        .resume         = ata_pci_device_resume,
 117#endif
 118};
 119
 120module_pci_driver(ata_tosh_pci_driver);
 121
 122MODULE_AUTHOR("Alan Cox");
 123MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
 124MODULE_LICENSE("GPL");
 125MODULE_DEVICE_TABLE(pci, ata_tosh);
 126MODULE_VERSION(DRV_VERSION);
 127
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