release/src-rt-6.x/linux/linux-2.6/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 "0.2.12"
  30
  31 /*
  32  *      A generic parallel ATA driver using libata
  33  */
  34
  35 /**
  36  *      generic_set_mode        -       mode setting
  37  *      @ap: interface to set up
  38  *      @unused: returned device on error
  39  *
  40  *      Use a non standard set_mode function. We don't want to be tuned.
  41  *      The BIOS configured everything. Our job is not to fiddle. We
  42  *      read the dma enabled bits from the PCI configuration of the device
  43  *      and respect them.
  44  */
  45
  46 static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
  47 {
  48         int dma_enabled = 0;
  49         int i;
  50
  51         /* Bits 5 and 6 indicate if DMA is active on master/slave */
  52         if (ap->ioaddr.bmdma_addr)
  53                 dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  54
  55         for (i = 0; i < ATA_MAX_DEVICES; i++) {
  56                 struct ata_device *dev = &ap->device[i];
  57                 if (ata_dev_enabled(dev)) {
  58                         /* We don't really care */
  59                         dev->pio_mode = XFER_PIO_0;
  60                         dev->dma_mode = XFER_MW_DMA_0;
  61                         /* We do need the right mode information for DMA or PIO
  62                            and this comes from the current configuration flags */
  63                         if (dma_enabled & (1 << (5 + i))) {
  64                                 ata_id_to_dma_mode(dev, XFER_MW_DMA_0);
  65                                 dev->flags &= ~ATA_DFLAG_PIO;
  66                         } else {
  67                                 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
  68                                 dev->xfer_mode = XFER_PIO_0;
  69                                 dev->xfer_shift = ATA_SHIFT_PIO;
  70                                 dev->flags |= ATA_DFLAG_PIO;
  71                         }
  72                 }
  73         }
  74         return 0;
  75 }
  76
  77 static struct scsi_host_template generic_sht = {
  78         .module                 = THIS_MODULE,
  79         .name                   = DRV_NAME,
  80         .ioctl                  = ata_scsi_ioctl,
  81         .queuecommand           = ata_scsi_queuecmd,
  82         .can_queue              = ATA_DEF_QUEUE,
  83         .this_id                = ATA_SHT_THIS_ID,
  84         .sg_tablesize           = LIBATA_MAX_PRD,
  85         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
  86         .emulated               = ATA_SHT_EMULATED,
  87         .use_clustering         = ATA_SHT_USE_CLUSTERING,
  88         .proc_name              = DRV_NAME,
  89         .dma_boundary           = ATA_DMA_BOUNDARY,
  90         .slave_configure        = ata_scsi_slave_config,
  91         .slave_destroy          = ata_scsi_slave_destroy,
  92         .bios_param             = ata_std_bios_param,
  93 };
  94
  95 static struct ata_port_operations generic_port_ops = {
  96         .set_mode       = generic_set_mode,
  97
  98         .port_disable   = ata_port_disable,
  99         .tf_load        = ata_tf_load,
 100         .tf_read        = ata_tf_read,
 101         .check_status   = ata_check_status,
 102         .exec_command   = ata_exec_command,
 103         .dev_select     = ata_std_dev_select,
 104
 105         .bmdma_setup    = ata_bmdma_setup,
 106         .bmdma_start    = ata_bmdma_start,
 107         .bmdma_stop     = ata_bmdma_stop,
 108         .bmdma_status   = ata_bmdma_status,
 109
 110         .data_xfer      = ata_data_xfer,
 111
 112         .freeze         = ata_bmdma_freeze,
 113         .thaw           = ata_bmdma_thaw,
 114         .error_handler  = ata_bmdma_error_handler,
 115         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 116         .cable_detect   = ata_cable_unknown,
 117
 118         .qc_prep        = ata_qc_prep,
 119         .qc_issue       = ata_qc_issue_prot,
 120
 121         .irq_handler    = ata_interrupt,
 122         .irq_clear      = ata_bmdma_irq_clear,
 123         .irq_on         = ata_irq_on,
 124         .irq_ack        = ata_irq_ack,
 125
 126         .port_start     = ata_port_start,
 127 };
 128
 129 static int all_generic_ide;             /* Set to claim all devices */
 130
 131 /**
 132  *      ata_generic_init                -       attach generic IDE
 133  *      @dev: PCI device found
 134  *      @id: match entry
 135  *
 136  *      Called each time a matching IDE interface is found. We check if the
 137  *      interface is one we wish to claim and if so we perform any chip
 138  *      specific hacks then let the ATA layer do the heavy lifting.
 139  */
 140
 141 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 142 {
 143         u16 command;
 144         static const struct ata_port_info info = {
 145                 .sht = &generic_sht,
 146                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 147                 .pio_mask = 0x1f,
 148                 .mwdma_mask = 0x07,
 149                 .udma_mask = 0x3f,
 150                 .port_ops = &generic_port_ops
 151         };
 152         const struct ata_port_info *ppi[] = { &info, NULL };
 153
 154         /* Don't use the generic entry unless instructed to do so */
 155         if (id->driver_data == 1 && all_generic_ide == 0)
 156                 return -ENODEV;
 157
 158         /* Devices that need care */
 159         if (dev->vendor == PCI_VENDOR_ID_UMC &&
 160             dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
 161             (!(PCI_FUNC(dev->devfn) & 1)))
 162                 return -ENODEV;
 163
 164         if (dev->vendor == PCI_VENDOR_ID_OPTI &&
 165             dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
 166             (!(PCI_FUNC(dev->devfn) & 1)))
 167                 return -ENODEV;
 168
 169         /* Don't re-enable devices in generic mode or we will break some
 170            motherboards with disabled and unused IDE controllers */
 171         pci_read_config_word(dev, PCI_COMMAND, &command);
 172         if (!(command & PCI_COMMAND_IO))
 173                 return -ENODEV;
 174
 175         if (dev->vendor == PCI_VENDOR_ID_AL)
 176                 ata_pci_clear_simplex(dev);
 177
 178         return ata_pci_init_one(dev, ppi);
 179 }
 180
 181 static struct pci_device_id ata_generic[] = {
 182         { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
 183         { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
 184         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8673F), },
 185         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886A), },
 186         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886BF), },
 187         { PCI_DEVICE(PCI_VENDOR_ID_HINT,   PCI_DEVICE_ID_HINT_VXPROII_IDE), },
 188         { PCI_DEVICE(PCI_VENDOR_ID_VIA,    PCI_DEVICE_ID_VIA_82C561), },
 189         { PCI_DEVICE(PCI_VENDOR_ID_OPTI,   PCI_DEVICE_ID_OPTI_82C558), },
 190         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
 191         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
 192         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
 193         /* Must come last. If you add entries adjust this table appropriately */
 194         { PCI_ANY_ID,           PCI_ANY_ID,                        PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
 195         { 0, },
 196 };
 197
 198 static struct pci_driver ata_generic_pci_driver = {
 199         .name           = DRV_NAME,
 200         .id_table       = ata_generic,
 201         .probe          = ata_generic_init_one,
 202         .remove         = ata_pci_remove_one,
 203 #ifdef CONFIG_PM
 204         .suspend        = ata_pci_device_suspend,
 205         .resume         = ata_pci_device_resume,
 206 #endif
 207 };
 208
 209 static int __init ata_generic_init(void)
 210 {
 211         return pci_register_driver(&ata_generic_pci_driver);
 212 }
 213
 214
 215 static void __exit ata_generic_exit(void)
 216 {
 217         pci_unregister_driver(&ata_generic_pci_driver);
 218 }
 219
 220
 221 MODULE_AUTHOR("Alan Cox");
 222 MODULE_DESCRIPTION("low-level driver for generic ATA");
 223 MODULE_LICENSE("GPL");
 224 MODULE_DEVICE_TABLE(pci, ata_generic);
 225 MODULE_VERSION(DRV_VERSION);
 226
 227 module_init(ata_generic_init);
 228 module_exit(ata_generic_exit);
 229
 230 module_param(all_generic_ide, int, 0);