drivers/ide/via82cxxx.c

   1 /*
   2  * VIA IDE driver for Linux. Supported southbridges:
   3  *
   4  *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
   5  *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
   6  *   vt8235, vt8237, vt8237a
   7  *
   8  * Copyright (c) 2000-2002 Vojtech Pavlik
   9  * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
  10  *
  11  * Based on the work of:
  12  *      Michel Aubry
  13  *      Jeff Garzik
  14  *      Andre Hedrick
  15  *
  16  * Documentation:
  17  *      Obsolete device documentation publicly available from via.com.tw
  18  *      Current device documentation available under NDA only
  19  */
  20
  21 /*
  22  * This program is free software; you can redistribute it and/or modify it
  23  * under the terms of the GNU General Public License version 2 as published by
  24  * the Free Software Foundation.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/slab.h>
  30 #include <linux/pci.h>
  31 #include <linux/init.h>
  32 #include <linux/ide.h>
  33 #include <linux/dmi.h>
  34
  35 #ifdef CONFIG_PPC_CHRP
  36 #include <asm/processor.h>
  37 #endif
  38
  39 #define DRV_NAME "via82cxxx"
  40
  41 #define VIA_IDE_ENABLE          0x40
  42 #define VIA_IDE_CONFIG          0x41
  43 #define VIA_FIFO_CONFIG         0x43
  44 #define VIA_MISC_1              0x44
  45 #define VIA_MISC_2              0x45
  46 #define VIA_MISC_3              0x46
  47 #define VIA_DRIVE_TIMING        0x48
  48 #define VIA_8BIT_TIMING         0x4e
  49 #define VIA_ADDRESS_SETUP       0x4c
  50 #define VIA_UDMA_TIMING         0x50
  51
  52 #define VIA_BAD_PREQ            0x01 /* Crashes if PREQ# till DDACK# set */
  53 #define VIA_BAD_CLK66           0x02 /* 66 MHz clock doesn't work correctly */
  54 #define VIA_SET_FIFO            0x04 /* Needs to have FIFO split set */
  55 #define VIA_NO_UNMASK           0x08 /* Doesn't work with IRQ unmasking on */
  56 #define VIA_BAD_ID              0x10 /* Has wrong vendor ID (0x1107) */
  57 #define VIA_BAD_AST             0x20 /* Don't touch Address Setup Timing */
  58 #define VIA_SATA_PATA           0x80 /* SATA/PATA combined configuration */
  59
  60 enum {
  61         VIA_IDFLAG_SINGLE = (1 << 1), /* single channel controller */
  62 };
  63
  64 /*
  65  * VIA SouthBridge chips.
  66  */
  67
  68 static struct via_isa_bridge {
  69         char *name;
  70         u16 id;
  71         u8 rev_min;
  72         u8 rev_max;
  73         u8 udma_mask;
  74         u8 flags;
  75 } via_isa_bridges[] = {
  76         { "vx855",      PCI_DEVICE_ID_VIA_VX855,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
  77         { "vx800",      PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
  78         { "cx700",      PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
  79         { "vt8261",     PCI_DEVICE_ID_VIA_8261,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  80         { "vt8237s",    PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  81         { "vt6410",     PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  82         { "vt6415",     PCI_DEVICE_ID_VIA_6415,     0x00, 0xff, ATA_UDMA6, VIA_BAD_AST },
  83         { "vt8251",     PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  84         { "vt8237",     PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  85         { "vt8237a",    PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  86         { "vt8235",     PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  87         { "vt8233a",    PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  88         { "vt8233c",    PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
  89         { "vt8233",     PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
  90         { "vt8231",     PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
  91         { "vt82c686b",  PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
  92         { "vt82c686a",  PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
  93         { "vt82c686",   PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
  94         { "vt82c596b",  PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
  95         { "vt82c596a",  PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
  96         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
  97         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
  98         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
  99         { "vt82c586a",  PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
 100         { "vt82c586",   PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
 101         { "vt82c576",   PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
 102         { "vt82c576",   PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
 103         { "vtxxxx",     PCI_DEVICE_ID_VIA_ANON,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 104         { NULL }
 105 };
 106
 107 static unsigned int via_clock;
 108 static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
 109
 110 struct via82cxxx_dev
 111 {
 112         struct via_isa_bridge *via_config;
 113         unsigned int via_80w;
 114 };
 115
 116 /**
 117  *      via_set_speed                   -       write timing registers
 118  *      @dev: PCI device
 119  *      @dn: device
 120  *      @timing: IDE timing data to use
 121  *
 122  *      via_set_speed writes timing values to the chipset registers
 123  */
 124
 125 static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
 126 {
 127         struct pci_dev *dev = to_pci_dev(hwif->dev);
 128         struct ide_host *host = pci_get_drvdata(dev);
 129         struct via82cxxx_dev *vdev = host->host_priv;
 130         u8 t;
 131
 132         if (~vdev->via_config->flags & VIA_BAD_AST) {
 133                 pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
 134                 t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
 135                 pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
 136         }
 137
 138         pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
 139                 ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
 140
 141         pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
 142                 ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
 143
 144         switch (vdev->via_config->udma_mask) {
 145         case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
 146         case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
 147         case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
 148         case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
 149         }
 150
 151         /* Set UDMA unless device is not UDMA capable */
 152         if (vdev->via_config->udma_mask) {
 153                 u8 udma_etc;
 154
 155                 pci_read_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, &udma_etc);
 156
 157                 /* clear transfer mode bit */
 158                 udma_etc &= ~0x20;
 159
 160                 if (timing->udma) {
 161                         /* preserve 80-wire cable detection bit */
 162                         udma_etc &= 0x10;
 163                         udma_etc |= t;
 164                 }
 165
 166                 pci_write_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, udma_etc);
 167         }
 168 }
 169
 170 /**
 171  *      via_set_drive           -       configure transfer mode
 172  *      @hwif: port
 173  *      @drive: Drive to set up
 174  *
 175  *      via_set_drive() computes timing values configures the chipset to
 176  *      a desired transfer mode.  It also can be called by upper layers.
 177  */
 178
 179 static void via_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
 180 {
 181         ide_drive_t *peer = ide_get_pair_dev(drive);
 182         struct pci_dev *dev = to_pci_dev(hwif->dev);
 183         struct ide_host *host = pci_get_drvdata(dev);
 184         struct via82cxxx_dev *vdev = host->host_priv;
 185         struct ide_timing t, p;
 186         unsigned int T, UT;
 187         const u8 speed = drive->dma_mode;
 188
 189         T = 1000000000 / via_clock;
 190
 191         switch (vdev->via_config->udma_mask) {
 192         case ATA_UDMA2: UT = T;   break;
 193         case ATA_UDMA4: UT = T/2; break;
 194         case ATA_UDMA5: UT = T/3; break;
 195         case ATA_UDMA6: UT = T/4; break;
 196         default:        UT = T;
 197         }
 198
 199         ide_timing_compute(drive, speed, &t, T, UT);
 200
 201         if (peer) {
 202                 ide_timing_compute(peer, peer->pio_mode, &p, T, UT);
 203                 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
 204         }
 205
 206         via_set_speed(hwif, drive->dn, &t);
 207 }
 208
 209 /**
 210  *      via_set_pio_mode        -       set host controller for PIO mode
 211  *      @hwif: port
 212  *      @drive: drive
 213  *
 214  *      A callback from the upper layers for PIO-only tuning.
 215  */
 216
 217 static void via_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 218 {
 219         drive->dma_mode = drive->pio_mode;
 220         via_set_drive(hwif, drive);
 221 }
 222
 223 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
 224 {
 225         struct via_isa_bridge *via_config;
 226
 227         for (via_config = via_isa_bridges;
 228              via_config->id != PCI_DEVICE_ID_VIA_ANON; via_config++)
 229                 if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
 230                         !!(via_config->flags & VIA_BAD_ID),
 231                         via_config->id, NULL))) {
 232
 233                         if ((*isa)->revision >= via_config->rev_min &&
 234                             (*isa)->revision <= via_config->rev_max)
 235                                 break;
 236                         pci_dev_put(*isa);
 237                 }
 238
 239         return via_config;
 240 }
 241
 242 /*
 243  * Check and handle 80-wire cable presence
 244  */
 245 static void via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
 246 {
 247         int i;
 248
 249         switch (vdev->via_config->udma_mask) {
 250                 case ATA_UDMA4:
 251                         for (i = 24; i >= 0; i -= 8)
 252                                 if (((u >> (i & 16)) & 8) &&
 253                                     ((u >> i) & 0x20) &&
 254                                      (((u >> i) & 7) < 2)) {
 255                                         /*
 256                                          * 2x PCI clock and
 257                                          * UDMA w/ < 3T/cycle
 258                                          */
 259                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 260                                 }
 261                         break;
 262
 263                 case ATA_UDMA5:
 264                         for (i = 24; i >= 0; i -= 8)
 265                                 if (((u >> i) & 0x10) ||
 266                                     (((u >> i) & 0x20) &&
 267                                      (((u >> i) & 7) < 4))) {
 268                                         /* BIOS 80-wire bit or
 269                                          * UDMA w/ < 60ns/cycle
 270                                          */
 271                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 272                                 }
 273                         break;
 274
 275                 case ATA_UDMA6:
 276                         for (i = 24; i >= 0; i -= 8)
 277                                 if (((u >> i) & 0x10) ||
 278                                     (((u >> i) & 0x20) &&
 279                                      (((u >> i) & 7) < 6))) {
 280                                         /* BIOS 80-wire bit or
 281                                          * UDMA w/ < 60ns/cycle
 282                                          */
 283                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 284                                 }
 285                         break;
 286         }
 287 }
 288
 289 /**
 290  *      init_chipset_via82cxxx  -       initialization handler
 291  *      @dev: PCI device
 292  *
 293  *      The initialization callback. Here we determine the IDE chip type
 294  *      and initialize its drive independent registers.
 295  */
 296
 297 static int init_chipset_via82cxxx(struct pci_dev *dev)
 298 {
 299         struct ide_host *host = pci_get_drvdata(dev);
 300         struct via82cxxx_dev *vdev = host->host_priv;
 301         struct via_isa_bridge *via_config = vdev->via_config;
 302         u8 t, v;
 303         u32 u;
 304
 305         /*
 306          * Detect cable and configure Clk66
 307          */
 308         pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
 309
 310         via_cable_detect(vdev, u);
 311
 312         if (via_config->udma_mask == ATA_UDMA4) {
 313                 /* Enable Clk66 */
 314                 pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
 315         } else if (via_config->flags & VIA_BAD_CLK66) {
 316                 /* Would cause trouble on 596a and 686 */
 317                 pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
 318         }
 319
 320         /*
 321          * Check whether interfaces are enabled.
 322          */
 323
 324         pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
 325
 326         /*
 327          * Set up FIFO sizes and thresholds.
 328          */
 329
 330         pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
 331
 332         /* Disable PREQ# till DDACK# */
 333         if (via_config->flags & VIA_BAD_PREQ) {
 334                 /* Would crash on 586b rev 41 */
 335                 t &= 0x7f;
 336         }
 337
 338         /* Fix FIFO split between channels */
 339         if (via_config->flags & VIA_SET_FIFO) {
 340                 t &= (t & 0x9f);
 341                 switch (v & 3) {
 342                         case 2: t |= 0x00; break;       /* 16 on primary */
 343                         case 1: t |= 0x60; break;       /* 16 on secondary */
 344                         case 3: t |= 0x20; break;       /* 8 pri 8 sec */
 345                 }
 346         }
 347
 348         pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
 349
 350         return 0;
 351 }
 352
 353 /*
 354  *      Cable special cases
 355  */
 356
 357 static const struct dmi_system_id cable_dmi_table[] = {
 358         {
 359                 .ident = "Acer Ferrari 3400",
 360                 .matches = {
 361                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
 362                         DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
 363                 },
 364         },
 365         { }
 366 };
 367
 368 static int via_cable_override(struct pci_dev *pdev)
 369 {
 370         /* Systems by DMI */
 371         if (dmi_check_system(cable_dmi_table))
 372                 return 1;
 373
 374         /* Arima W730-K8/Targa Visionary 811/... */
 375         if (pdev->subsystem_vendor == 0x161F &&
 376             pdev->subsystem_device == 0x2032)
 377                 return 1;
 378
 379         return 0;
 380 }
 381
 382 static u8 via82cxxx_cable_detect(ide_hwif_t *hwif)
 383 {
 384         struct pci_dev *pdev = to_pci_dev(hwif->dev);
 385         struct ide_host *host = pci_get_drvdata(pdev);
 386         struct via82cxxx_dev *vdev = host->host_priv;
 387
 388         if (via_cable_override(pdev))
 389                 return ATA_CBL_PATA40_SHORT;
 390
 391         if ((vdev->via_config->flags & VIA_SATA_PATA) && hwif->channel == 0)
 392                 return ATA_CBL_SATA;
 393
 394         if ((vdev->via_80w >> hwif->channel) & 1)
 395                 return ATA_CBL_PATA80;
 396         else
 397                 return ATA_CBL_PATA40;
 398 }
 399
 400 static const struct ide_port_ops via_port_ops = {
 401         .set_pio_mode           = via_set_pio_mode,
 402         .set_dma_mode           = via_set_drive,
 403         .cable_detect           = via82cxxx_cable_detect,
 404 };
 405
 406 static const struct ide_port_info via82cxxx_chipset __devinitconst = {
 407         .name           = DRV_NAME,
 408         .init_chipset   = init_chipset_via82cxxx,
 409         .enablebits     = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
 410         .port_ops       = &via_port_ops,
 411         .host_flags     = IDE_HFLAG_PIO_NO_BLACKLIST |
 412                           IDE_HFLAG_POST_SET_MODE |
 413                           IDE_HFLAG_IO_32BIT,
 414         .pio_mask       = ATA_PIO5,
 415         .swdma_mask     = ATA_SWDMA2,
 416         .mwdma_mask     = ATA_MWDMA2,
 417 };
 418
 419 static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 420 {
 421         struct pci_dev *isa = NULL;
 422         struct via_isa_bridge *via_config;
 423         struct via82cxxx_dev *vdev;
 424         int rc;
 425         u8 idx = id->driver_data;
 426         struct ide_port_info d;
 427
 428         d = via82cxxx_chipset;
 429
 430         /*
 431          * Find the ISA bridge and check we know what it is.
 432          */
 433         via_config = via_config_find(&isa);
 434
 435         /*
 436          * Print the boot message.
 437          */
 438         printk(KERN_INFO DRV_NAME " %s: VIA %s (rev %02x) IDE %sDMA%s\n",
 439                 pci_name(dev), via_config->name, isa->revision,
 440                 via_config->udma_mask ? "U" : "MW",
 441                 via_dma[via_config->udma_mask ?
 442                         (fls(via_config->udma_mask) - 1) : 0]);
 443
 444         pci_dev_put(isa);
 445
 446         /*
 447          * Determine system bus clock.
 448          */
 449         via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
 450
 451         switch (via_clock) {
 452         case 33000: via_clock = 33333; break;
 453         case 37000: via_clock = 37500; break;
 454         case 41000: via_clock = 41666; break;
 455         }
 456
 457         if (via_clock < 20000 || via_clock > 50000) {
 458                 printk(KERN_WARNING DRV_NAME ": User given PCI clock speed "
 459                         "impossible (%d), using 33 MHz instead.\n", via_clock);
 460                 via_clock = 33333;
 461         }
 462
 463         if (idx == 1)
 464                 d.enablebits[1].reg = d.enablebits[0].reg = 0;
 465         else
 466                 d.host_flags |= IDE_HFLAG_NO_AUTODMA;
 467
 468         if (idx == VIA_IDFLAG_SINGLE)
 469                 d.host_flags |= IDE_HFLAG_SINGLE;
 470
 471         if ((via_config->flags & VIA_NO_UNMASK) == 0)
 472                 d.host_flags |= IDE_HFLAG_UNMASK_IRQS;
 473
 474         d.udma_mask = via_config->udma_mask;
 475
 476         vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
 477         if (!vdev) {
 478                 printk(KERN_ERR DRV_NAME " %s: out of memory :(\n",
 479                         pci_name(dev));
 480                 return -ENOMEM;
 481         }
 482
 483         vdev->via_config = via_config;
 484
 485         rc = ide_pci_init_one(dev, &d, vdev);
 486         if (rc)
 487                 kfree(vdev);
 488
 489         return rc;
 490 }
 491
 492 static void __devexit via_remove(struct pci_dev *dev)
 493 {
 494         struct ide_host *host = pci_get_drvdata(dev);
 495         struct via82cxxx_dev *vdev = host->host_priv;
 496
 497         ide_pci_remove(dev);
 498         kfree(vdev);
 499 }
 500
 501 static const struct pci_device_id via_pci_tbl[] = {
 502         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1),  0 },
 503         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1),  0 },
 504         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
 505         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_VX855_IDE), VIA_IDFLAG_SINGLE },
 506         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410),      1 },
 507         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6415),      1 },
 508         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
 509         { 0, },
 510 };
 511 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
 512
 513 static struct pci_driver via_pci_driver = {
 514         .name           = "VIA_IDE",
 515         .id_table       = via_pci_tbl,
 516         .probe          = via_init_one,
 517         .remove         = __devexit_p(via_remove),
 518         .suspend        = ide_pci_suspend,
 519         .resume         = ide_pci_resume,
 520 };
 521
 522 static int __init via_ide_init(void)
 523 {
 524         return ide_pci_register_driver(&via_pci_driver);
 525 }
 526
 527 static void __exit via_ide_exit(void)
 528 {
 529         pci_unregister_driver(&via_pci_driver);
 530 }
 531
 532 module_init(via_ide_init);
 533 module_exit(via_ide_exit);
 534
 535 MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz, Michel Aubry, Jeff Garzik, Andre Hedrick");
 536 MODULE_DESCRIPTION("PCI driver module for VIA IDE");
 537 MODULE_LICENSE("GPL");