drivers/ata/pata_piccolo.c

   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
  32 static 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
  45 static 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
  66 static struct scsi_host_template tosh_sht = {
  67         ATA_BMDMA_SHT(DRV_NAME),
  68 };
  69
  70 static 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
  87 static 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_sff_init_one(dev, ppi, &tosh_sht, NULL, 0);
  99 }
 100
 101 static 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
 109 static 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
 120 static int __init ata_tosh_init(void)
 121 {
 122         return pci_register_driver(&ata_tosh_pci_driver);
 123 }
 124
 125
 126 static void __exit ata_tosh_exit(void)
 127 {
 128         pci_unregister_driver(&ata_tosh_pci_driver);
 129 }
 130
 131
 132 MODULE_AUTHOR("Alan Cox");
 133 MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
 134 MODULE_LICENSE("GPL");
 135 MODULE_DEVICE_TABLE(pci, ata_tosh);
 136 MODULE_VERSION(DRV_VERSION);
 137
 138 module_init(ata_tosh_init);
 139 module_exit(ata_tosh_exit);
 140