drivers/ata/ata_generic.c

   1 /*
   2  *  ata_generic.c - Generic PATA/SATA controller driver.
   3  *  Copyright 2005 Red Hat Inc <alan@redhat.com>, 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 "0.2.11"
  30
  31 /*
  32  *      A generic parallel ATA driver using libata
  33  */
  34
  35 /**
  36  *      generic_pre_reset               -       probe begin
  37  *      @ap: ATA port
  38  *
  39  *      Set up cable type and use generic probe init
  40  */
  41
  42 static int generic_pre_reset(struct ata_port *ap)
  43 {
  44         ap->cbl = ATA_CBL_PATA80;
  45         return ata_std_prereset(ap);
  46 }
  47
  48
  49 /**
  50  *      generic_error_handler - Probe specified port on PATA host controller
  51  *      @ap: Port to probe
  52  *      @classes:
  53  *
  54  *      LOCKING:
  55  *      None (inherited from caller).
  56  */
  57
  58
  59 static void generic_error_handler(struct ata_port *ap)
  60 {
  61         ata_bmdma_drive_eh(ap, generic_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
  62 }
  63
  64 /**
  65  *      generic_set_mode        -       mode setting
  66  *      @ap: interface to set up
  67  *      @unused: returned device on error
  68  *
  69  *      Use a non standard set_mode function. We don't want to be tuned.
  70  *      The BIOS configured everything. Our job is not to fiddle. We
  71  *      read the dma enabled bits from the PCI configuration of the device
  72  *      and respect them.
  73  */
  74
  75 static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
  76 {
  77         int dma_enabled = 0;
  78         int i;
  79
  80         /* Bits 5 and 6 indicate if DMA is active on master/slave */
  81         if (ap->ioaddr.bmdma_addr)
  82                 dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
  83
  84         for (i = 0; i < ATA_MAX_DEVICES; i++) {
  85                 struct ata_device *dev = &ap->device[i];
  86                 if (ata_dev_ready(dev)) {
  87                         /* We don't really care */
  88                         dev->pio_mode = XFER_PIO_0;
  89                         dev->dma_mode = XFER_MW_DMA_0;
  90                         /* We do need the right mode information for DMA or PIO
  91                            and this comes from the current configuration flags */
  92                         if (dma_enabled & (1 << (5 + i))) {
  93                                 ata_id_to_dma_mode(dev, XFER_MW_DMA_0);
  94                                 dev->flags &= ~ATA_DFLAG_PIO;
  95                         } else {
  96                                 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
  97                                 dev->xfer_mode = XFER_PIO_0;
  98                                 dev->xfer_shift = ATA_SHIFT_PIO;
  99                                 dev->flags |= ATA_DFLAG_PIO;
 100                         }
 101                 }
 102         }
 103         return 0;
 104 }
 105
 106 static struct scsi_host_template generic_sht = {
 107         .module                 = THIS_MODULE,
 108         .name                   = DRV_NAME,
 109         .ioctl                  = ata_scsi_ioctl,
 110         .queuecommand           = ata_scsi_queuecmd,
 111         .can_queue              = ATA_DEF_QUEUE,
 112         .this_id                = ATA_SHT_THIS_ID,
 113         .sg_tablesize           = LIBATA_MAX_PRD,
 114         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 115         .emulated               = ATA_SHT_EMULATED,
 116         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 117         .proc_name              = DRV_NAME,
 118         .dma_boundary           = ATA_DMA_BOUNDARY,
 119         .slave_configure        = ata_scsi_slave_config,
 120         .slave_destroy          = ata_scsi_slave_destroy,
 121         .bios_param             = ata_std_bios_param,
 122 #ifdef CONFIG_PM
 123         .resume                 = ata_scsi_device_resume,
 124         .suspend                = ata_scsi_device_suspend,
 125 #endif
 126 };
 127
 128 static struct ata_port_operations generic_port_ops = {
 129         .set_mode       = generic_set_mode,
 130
 131         .port_disable   = ata_port_disable,
 132         .tf_load        = ata_tf_load,
 133         .tf_read        = ata_tf_read,
 134         .check_status   = ata_check_status,
 135         .exec_command   = ata_exec_command,
 136         .dev_select     = ata_std_dev_select,
 137
 138         .bmdma_setup    = ata_bmdma_setup,
 139         .bmdma_start    = ata_bmdma_start,
 140         .bmdma_stop     = ata_bmdma_stop,
 141         .bmdma_status   = ata_bmdma_status,
 142
 143         .data_xfer      = ata_data_xfer,
 144
 145         .freeze         = ata_bmdma_freeze,
 146         .thaw           = ata_bmdma_thaw,
 147         .error_handler  = generic_error_handler,
 148         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 149
 150         .qc_prep        = ata_qc_prep,
 151         .qc_issue       = ata_qc_issue_prot,
 152
 153         .irq_handler    = ata_interrupt,
 154         .irq_clear      = ata_bmdma_irq_clear,
 155         .irq_on         = ata_irq_on,
 156         .irq_ack        = ata_irq_ack,
 157
 158         .port_start     = ata_port_start,
 159 };
 160
 161 static int all_generic_ide;             /* Set to claim all devices */
 162
 163 /**
 164  *      ata_generic_init                -       attach generic IDE
 165  *      @dev: PCI device found
 166  *      @id: match entry
 167  *
 168  *      Called each time a matching IDE interface is found. We check if the
 169  *      interface is one we wish to claim and if so we perform any chip
 170  *      specific hacks then let the ATA layer do the heavy lifting.
 171  */
 172
 173 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 174 {
 175         u16 command;
 176         static struct ata_port_info info = {
 177                 .sht = &generic_sht,
 178                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 179                 .pio_mask = 0x1f,
 180                 .mwdma_mask = 0x07,
 181                 .udma_mask = 0x3f,
 182                 .port_ops = &generic_port_ops
 183         };
 184         static struct ata_port_info *port_info[2] = { &info, &info };
 185
 186         /* Don't use the generic entry unless instructed to do so */
 187         if (id->driver_data == 1 && all_generic_ide == 0)
 188                 return -ENODEV;
 189
 190         /* Devices that need care */
 191         if (dev->vendor == PCI_VENDOR_ID_UMC &&
 192             dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
 193             (!(PCI_FUNC(dev->devfn) & 1)))
 194                 return -ENODEV;
 195
 196         if (dev->vendor == PCI_VENDOR_ID_OPTI &&
 197             dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
 198             (!(PCI_FUNC(dev->devfn) & 1)))
 199                 return -ENODEV;
 200
 201         /* Don't re-enable devices in generic mode or we will break some
 202            motherboards with disabled and unused IDE controllers */
 203         pci_read_config_word(dev, PCI_COMMAND, &command);
 204         if (!(command & PCI_COMMAND_IO))
 205                 return -ENODEV;
 206
 207         if (dev->vendor == PCI_VENDOR_ID_AL)
 208                 ata_pci_clear_simplex(dev);
 209
 210         return ata_pci_init_one(dev, port_info, 2);
 211 }
 212
 213 static struct pci_device_id ata_generic[] = {
 214         { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
 215         { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
 216         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8673F), },
 217         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886A), },
 218         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886BF), },
 219         { PCI_DEVICE(PCI_VENDOR_ID_HINT,   PCI_DEVICE_ID_HINT_VXPROII_IDE), },
 220         { PCI_DEVICE(PCI_VENDOR_ID_VIA,    PCI_DEVICE_ID_VIA_82C561), },
 221         { PCI_DEVICE(PCI_VENDOR_ID_OPTI,   PCI_DEVICE_ID_OPTI_82C558), },
 222         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
 223         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
 224         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
 225         /* Must come last. If you add entries adjust this table appropriately */
 226         { PCI_ANY_ID,           PCI_ANY_ID,                        PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
 227         { 0, },
 228 };
 229
 230 static struct pci_driver ata_generic_pci_driver = {
 231         .name           = DRV_NAME,
 232         .id_table       = ata_generic,
 233         .probe          = ata_generic_init_one,
 234         .remove         = ata_pci_remove_one,
 235 #ifdef CONFIG_PM
 236         .suspend        = ata_pci_device_suspend,
 237         .resume         = ata_pci_device_resume,
 238 #endif
 239 };
 240
 241 static int __init ata_generic_init(void)
 242 {
 243         return pci_register_driver(&ata_generic_pci_driver);
 244 }
 245
 246
 247 static void __exit ata_generic_exit(void)
 248 {
 249         pci_unregister_driver(&ata_generic_pci_driver);
 250 }
 251
 252
 253 MODULE_AUTHOR("Alan Cox");
 254 MODULE_DESCRIPTION("low-level driver for generic ATA");
 255 MODULE_LICENSE("GPL");
 256 MODULE_DEVICE_TABLE(pci, ata_generic);
 257 MODULE_VERSION(DRV_VERSION);
 258
 259 module_init(ata_generic_init);
 260 module_exit(ata_generic_exit);
 261
 262 module_param(all_generic_ide, int, 0);