release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/ata/ata_generic.c

   1 /*
   2  *  ata_generic.c - Generic PATA/SATA controller driver.
   3  *  Copyright 2005 Red Hat Inc, all rights reserved.
   4  *
   5  *  Elements from ide/pci/generic.c
   6  *          Copyright (C) 2001-2002     Andre Hedrick <andre@linux-ide.org>
   7  *          Portions (C) Copyright 2002  Red Hat Inc <alan@redhat.com>
   8  *
   9  *  May be copied or modified under the terms of the GNU General Public License
  10  *
  11  *  Driver for PCI IDE interfaces implementing the standard bus mastering
  12  *  interface functionality. This assumes the BIOS did the drive set up and
  13  *  tuning for us. By default we do not grab all IDE class devices as they
  14  *  may have other drivers or need fixups to avoid problems. Instead we keep
  15  *  a default list of stuff without documentation/driver that appears to
  16  *  work.
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/pci.h>
  22 #include <linux/init.h>
  23 #include <linux/blkdev.h>
  24 #include <linux/delay.h>
  25 #include <scsi/scsi_host.h>
  26 #include <linux/libata.h>
  27
  28 #define DRV_NAME "ata_generic"
  29 #define DRV_VERSION "0.2.15"
  30
  31 /*
  32  *      A generic parallel ATA driver using libata
  33  */
  34
  35 enum {
  36         ATA_GEN_CLASS_MATCH             = (1 << 0),
  37         ATA_GEN_FORCE_DMA               = (1 << 1),
  38 };
  39
  40 /**
  41  *      generic_set_mode        -       mode setting
  42  *      @link: link to set up
  43  *      @unused: returned device on error
  44  *
  45  *      Use a non standard set_mode function. We don't want to be tuned.
  46  *      The BIOS configured everything. Our job is not to fiddle. We
  47  *      read the dma enabled bits from the PCI configuration of the device
  48  *      and respect them.
  49  */
  50
  51 static int generic_set_mode(struct ata_link *link, struct ata_device **unused)
  52 {
  53         struct ata_port *ap = link->ap;
  54         const struct pci_device_id *id = ap->host->private_data;
  55         int dma_enabled = 0;
  56         struct ata_device *dev;
  57
  58         if (id->driver_data & ATA_GEN_FORCE_DMA) {
  59                 dma_enabled = 0xff;
  60         } else if (ap->ioaddr.bmdma_addr) {
  61                 /* Bits 5 and 6 indicate if DMA is active on master/slave */
  62                 dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  63         }
  64
  65         ata_for_each_dev(dev, link, ENABLED) {
  66                 /* We don't really care */
  67                 dev->pio_mode = XFER_PIO_0;
  68                 dev->dma_mode = XFER_MW_DMA_0;
  69                 /* We do need the right mode information for DMA or PIO
  70                    and this comes from the current configuration flags */
  71                 if (dma_enabled & (1 << (5 + dev->devno))) {
  72                         unsigned int xfer_mask = ata_id_xfermask(dev->id);
  73                         const char *name;
  74
  75                         if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
  76                                 name = ata_mode_string(xfer_mask);
  77                         else {
  78                                 /* SWDMA perhaps? */
  79                                 name = "DMA";
  80                                 xfer_mask |= ata_xfer_mode2mask(XFER_MW_DMA_0);
  81                         }
  82
  83                         ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
  84                                        name);
  85
  86                         dev->xfer_mode = ata_xfer_mask2mode(xfer_mask);
  87                         dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode);
  88                         dev->flags &= ~ATA_DFLAG_PIO;
  89                 } else {
  90                         ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
  91                         dev->xfer_mode = XFER_PIO_0;
  92                         dev->xfer_shift = ATA_SHIFT_PIO;
  93                         dev->flags |= ATA_DFLAG_PIO;
  94                 }
  95         }
  96         return 0;
  97 }
  98
  99 static struct scsi_host_template generic_sht = {
 100         ATA_BMDMA_SHT(DRV_NAME),
 101 };
 102
 103 static struct ata_port_operations generic_port_ops = {
 104         .inherits       = &ata_bmdma_port_ops,
 105         .cable_detect   = ata_cable_unknown,
 106         .set_mode       = generic_set_mode,
 107 };
 108
 109 static int all_generic_ide;             /* Set to claim all devices */
 110
 111 /**
 112  *      ata_generic_init                -       attach generic IDE
 113  *      @dev: PCI device found
 114  *      @id: match entry
 115  *
 116  *      Called each time a matching IDE interface is found. We check if the
 117  *      interface is one we wish to claim and if so we perform any chip
 118  *      specific hacks then let the ATA layer do the heavy lifting.
 119  */
 120
 121 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 122 {
 123         u16 command;
 124         static const struct ata_port_info info = {
 125                 .flags = ATA_FLAG_SLAVE_POSS,
 126                 .pio_mask = ATA_PIO4,
 127                 .mwdma_mask = ATA_MWDMA2,
 128                 .udma_mask = ATA_UDMA5,
 129                 .port_ops = &generic_port_ops
 130         };
 131         const struct ata_port_info *ppi[] = { &info, NULL };
 132
 133         /* Don't use the generic entry unless instructed to do so */
 134         if ((id->driver_data & ATA_GEN_CLASS_MATCH) && all_generic_ide == 0)
 135                 return -ENODEV;
 136
 137         /* Devices that need care */
 138         if (dev->vendor == PCI_VENDOR_ID_UMC &&
 139             dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
 140             (!(PCI_FUNC(dev->devfn) & 1)))
 141                 return -ENODEV;
 142
 143         if (dev->vendor == PCI_VENDOR_ID_OPTI &&
 144             dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
 145             (!(PCI_FUNC(dev->devfn) & 1)))
 146                 return -ENODEV;
 147
 148         /* Don't re-enable devices in generic mode or we will break some
 149            motherboards with disabled and unused IDE controllers */
 150         pci_read_config_word(dev, PCI_COMMAND, &command);
 151         if (!(command & PCI_COMMAND_IO))
 152                 return -ENODEV;
 153
 154         if (dev->vendor == PCI_VENDOR_ID_AL)
 155                 ata_pci_bmdma_clear_simplex(dev);
 156
 157         if (dev->vendor == PCI_VENDOR_ID_ATI) {
 158                 int rc = pcim_enable_device(dev);
 159                 if (rc < 0)
 160                         return rc;
 161                 pcim_pin_device(dev);
 162         }
 163         return ata_pci_bmdma_init_one(dev, ppi, &generic_sht, (void *)id, 0);
 164 }
 165
 166 static struct pci_device_id ata_generic[] = {
 167         { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
 168         { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
 169         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8673F), },
 170         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886A), },
 171         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886BF), },
 172         { PCI_DEVICE(PCI_VENDOR_ID_HINT,   PCI_DEVICE_ID_HINT_VXPROII_IDE), },
 173         { PCI_DEVICE(PCI_VENDOR_ID_VIA,    PCI_DEVICE_ID_VIA_82C561), },
 174         { PCI_DEVICE(PCI_VENDOR_ID_OPTI,   PCI_DEVICE_ID_OPTI_82C558), },
 175         { PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE),
 176           .driver_data = ATA_GEN_FORCE_DMA },
 177         /*
 178          * For some reason, MCP89 on MacBook 7,1 doesn't work with
 179          * ahci, use ata_generic instead.
 180          */
 181         { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP89_SATA,
 182           PCI_VENDOR_ID_APPLE, 0xcb89,
 183           .driver_data = ATA_GEN_FORCE_DMA },
 184 #if !defined(CONFIG_PATA_TOSHIBA) && !defined(CONFIG_PATA_TOSHIBA_MODULE)
 185         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
 186         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
 187         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3),  },
 188         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5),  },
 189 #endif
 190         /* Must come last. If you add entries adjust this table appropriately */
 191         { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL),
 192           .driver_data = ATA_GEN_CLASS_MATCH },
 193         { 0, },
 194 };
 195
 196 static struct pci_driver ata_generic_pci_driver = {
 197         .name           = DRV_NAME,
 198         .id_table       = ata_generic,
 199         .probe          = ata_generic_init_one,
 200         .remove         = ata_pci_remove_one,
 201 #ifdef CONFIG_PM
 202         .suspend        = ata_pci_device_suspend,
 203         .resume         = ata_pci_device_resume,
 204 #endif
 205 };
 206
 207 static int __init ata_generic_init(void)
 208 {
 209         return pci_register_driver(&ata_generic_pci_driver);
 210 }
 211
 212
 213 static void __exit ata_generic_exit(void)
 214 {
 215         pci_unregister_driver(&ata_generic_pci_driver);
 216 }
 217
 218
 219 MODULE_AUTHOR("Alan Cox");
 220 MODULE_DESCRIPTION("low-level driver for generic ATA");
 221 MODULE_LICENSE("GPL");
 222 MODULE_DEVICE_TABLE(pci, ata_generic);
 223 MODULE_VERSION(DRV_VERSION);
 224
 225 module_init(ata_generic_init);
 226 module_exit(ata_generic_exit);
 227
 228 module_param(all_generic_ide, int, 0);