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 "0.2.15"
  30
  31 /*
  32  *      A generic parallel ATA driver using libata
  33  */
  34
  35 /**
  36  *      generic_set_mode        -       mode setting
  37  *      @link: link 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_link *link, struct ata_device **unused)
  47 {
  48         struct ata_port *ap = link->ap;
  49         int dma_enabled = 0;
  50         struct ata_device *dev;
  51         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  52
  53         /* Bits 5 and 6 indicate if DMA is active on master/slave */
  54         if (ap->ioaddr.bmdma_addr)
  55                 dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  56
  57         if (pdev->vendor == PCI_VENDOR_ID_CENATEK)
  58                 dma_enabled = 0xFF;
  59
  60         ata_link_for_each_dev(dev, link) {
  61                 if (!ata_dev_enabled(dev))
  62                         continue;
  63
  64                 /* We don't really care */
  65                 dev->pio_mode = XFER_PIO_0;
  66                 dev->dma_mode = XFER_MW_DMA_0;
  67                 /* We do need the right mode information for DMA or PIO
  68                    and this comes from the current configuration flags */
  69                 if (dma_enabled & (1 << (5 + dev->devno))) {
  70                         unsigned int xfer_mask = ata_id_xfermask(dev->id);
  71                         const char *name;
  72
  73                         if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
  74                                 name = ata_mode_string(xfer_mask);
  75                         else {
  76                                 /* SWDMA perhaps? */
  77                                 name = "DMA";
  78                                 xfer_mask |= ata_xfer_mode2mask(XFER_MW_DMA_0);
  79                         }
  80
  81                         ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
  82                                        name);
  83
  84                         dev->xfer_mode = ata_xfer_mask2mode(xfer_mask);
  85                         dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode);
  86                         dev->flags &= ~ATA_DFLAG_PIO;
  87                 } else {
  88                         ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
  89                         dev->xfer_mode = XFER_PIO_0;
  90                         dev->xfer_shift = ATA_SHIFT_PIO;
  91                         dev->flags |= ATA_DFLAG_PIO;
  92                 }
  93         }
  94         return 0;
  95 }
  96
  97 static struct scsi_host_template generic_sht = {
  98         .module                 = THIS_MODULE,
  99         .name                   = DRV_NAME,
 100         .ioctl                  = ata_scsi_ioctl,
 101         .queuecommand           = ata_scsi_queuecmd,
 102         .can_queue              = ATA_DEF_QUEUE,
 103         .this_id                = ATA_SHT_THIS_ID,
 104         .sg_tablesize           = LIBATA_MAX_PRD,
 105         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 106         .emulated               = ATA_SHT_EMULATED,
 107         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 108         .proc_name              = DRV_NAME,
 109         .dma_boundary           = ATA_DMA_BOUNDARY,
 110         .slave_configure        = ata_scsi_slave_config,
 111         .slave_destroy          = ata_scsi_slave_destroy,
 112         .bios_param             = ata_std_bios_param,
 113 };
 114
 115 static struct ata_port_operations generic_port_ops = {
 116         .set_mode       = generic_set_mode,
 117
 118         .tf_load        = ata_tf_load,
 119         .tf_read        = ata_tf_read,
 120         .check_status   = ata_check_status,
 121         .exec_command   = ata_exec_command,
 122         .dev_select     = ata_std_dev_select,
 123
 124         .bmdma_setup    = ata_bmdma_setup,
 125         .bmdma_start    = ata_bmdma_start,
 126         .bmdma_stop     = ata_bmdma_stop,
 127         .bmdma_status   = ata_bmdma_status,
 128
 129         .data_xfer      = ata_data_xfer,
 130
 131         .freeze         = ata_bmdma_freeze,
 132         .thaw           = ata_bmdma_thaw,
 133         .error_handler  = ata_bmdma_error_handler,
 134         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 135         .cable_detect   = ata_cable_unknown,
 136
 137         .qc_prep        = ata_qc_prep,
 138         .qc_issue       = ata_qc_issue_prot,
 139
 140         .irq_handler    = ata_interrupt,
 141         .irq_clear      = ata_bmdma_irq_clear,
 142         .irq_on         = ata_irq_on,
 143
 144         .port_start     = ata_sff_port_start,
 145 };
 146
 147 static int all_generic_ide;             /* Set to claim all devices */
 148
 149 /**
 150  *      ata_generic_init                -       attach generic IDE
 151  *      @dev: PCI device found
 152  *      @id: match entry
 153  *
 154  *      Called each time a matching IDE interface is found. We check if the
 155  *      interface is one we wish to claim and if so we perform any chip
 156  *      specific hacks then let the ATA layer do the heavy lifting.
 157  */
 158
 159 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 160 {
 161         u16 command;
 162         static const struct ata_port_info info = {
 163                 .sht = &generic_sht,
 164                 .flags = ATA_FLAG_SLAVE_POSS,
 165                 .pio_mask = 0x1f,
 166                 .mwdma_mask = 0x07,
 167                 .udma_mask = ATA_UDMA5,
 168                 .port_ops = &generic_port_ops
 169         };
 170         const struct ata_port_info *ppi[] = { &info, NULL };
 171
 172         /* Don't use the generic entry unless instructed to do so */
 173         if (id->driver_data == 1 && all_generic_ide == 0)
 174                 return -ENODEV;
 175
 176         /* Devices that need care */
 177         if (dev->vendor == PCI_VENDOR_ID_UMC &&
 178             dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
 179             (!(PCI_FUNC(dev->devfn) & 1)))
 180                 return -ENODEV;
 181
 182         if (dev->vendor == PCI_VENDOR_ID_OPTI &&
 183             dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
 184             (!(PCI_FUNC(dev->devfn) & 1)))
 185                 return -ENODEV;
 186
 187         /* Don't re-enable devices in generic mode or we will break some
 188            motherboards with disabled and unused IDE controllers */
 189         pci_read_config_word(dev, PCI_COMMAND, &command);
 190         if (!(command & PCI_COMMAND_IO))
 191                 return -ENODEV;
 192
 193         if (dev->vendor == PCI_VENDOR_ID_AL)
 194                 ata_pci_clear_simplex(dev);
 195
 196         return ata_pci_init_one(dev, ppi);
 197 }
 198
 199 static struct pci_device_id ata_generic[] = {
 200         { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
 201         { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
 202         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8673F), },
 203         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886A), },
 204         { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886BF), },
 205         { PCI_DEVICE(PCI_VENDOR_ID_HINT,   PCI_DEVICE_ID_HINT_VXPROII_IDE), },
 206         { PCI_DEVICE(PCI_VENDOR_ID_VIA,    PCI_DEVICE_ID_VIA_82C561), },
 207         { PCI_DEVICE(PCI_VENDOR_ID_OPTI,   PCI_DEVICE_ID_OPTI_82C558), },
 208         { PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), },
 209         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
 210         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
 211         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
 212         /* Must come last. If you add entries adjust this table appropriately */
 213         { PCI_ANY_ID,           PCI_ANY_ID,                        PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
 214         { 0, },
 215 };
 216
 217 static struct pci_driver ata_generic_pci_driver = {
 218         .name           = DRV_NAME,
 219         .id_table       = ata_generic,
 220         .probe          = ata_generic_init_one,
 221         .remove         = ata_pci_remove_one,
 222 #ifdef CONFIG_PM
 223         .suspend        = ata_pci_device_suspend,
 224         .resume         = ata_pci_device_resume,
 225 #endif
 226 };
 227
 228 static int __init ata_generic_init(void)
 229 {
 230         return pci_register_driver(&ata_generic_pci_driver);
 231 }
 232
 233
 234 static void __exit ata_generic_exit(void)
 235 {
 236         pci_unregister_driver(&ata_generic_pci_driver);
 237 }
 238
 239
 240 MODULE_AUTHOR("Alan Cox");
 241 MODULE_DESCRIPTION("low-level driver for generic ATA");
 242 MODULE_LICENSE("GPL");
 243 MODULE_DEVICE_TABLE(pci, ata_generic);
 244 MODULE_VERSION(DRV_VERSION);
 245
 246 module_init(ata_generic_init);
 247 module_exit(ata_generic_exit);
 248
 249 module_param(all_generic_ide, int, 0);