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/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
  31 static 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
  44 static 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
  65 static struct scsi_host_template tosh_sht = {
  66         ATA_BMDMA_SHT(DRV_NAME),
  67 };
  68
  69 static 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
  86 static 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
 100 static 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
 108 static 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_SLEEP
 114         .suspend        = ata_pci_device_suspend,
 115         .resume         = ata_pci_device_resume,
 116 #endif
 117 };
 118
 119 module_pci_driver(ata_tosh_pci_driver);
 120
 121 MODULE_AUTHOR("Alan Cox");
 122 MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
 123 MODULE_LICENSE("GPL");
 124 MODULE_DEVICE_TABLE(pci, ata_tosh);
 125 MODULE_VERSION(DRV_VERSION);