drivers/ide/pci/serverworks.c

   1 /*
   2  * linux/drivers/ide/pci/serverworks.c          Version 0.8      25 Ebr 2003
   3  *
   4  * Copyright (C) 1998-2000 Michel Aubry
   5  * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
   6  * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
   7  * Portions copyright (c) 2001 Sun Microsystems
   8  *
   9  *
  10  * RCC/ServerWorks IDE driver for Linux
  11  *
  12  *   OSB4: `Open South Bridge' IDE Interface (fn 1)
  13  *         supports UDMA mode 2 (33 MB/s)
  14  *
  15  *   CSB5: `Champion South Bridge' IDE Interface (fn 1)
  16  *         all revisions support UDMA mode 4 (66 MB/s)
  17  *         revision A2.0 and up support UDMA mode 5 (100 MB/s)
  18  *
  19  *         *** The CSB5 does not provide ANY register ***
  20  *         *** to detect 80-conductor cable presence. ***
  21  *
  22  *   CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
  23  *
  24  * Documentation:
  25  *      Available under NDA only. Errata info very hard to get.
  26  *
  27  */
  28
  29 #include <linux/config.h>
  30 #include <linux/types.h>
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/ioport.h>
  34 #include <linux/pci.h>
  35 #include <linux/hdreg.h>
  36 #include <linux/ide.h>
  37 #include <linux/init.h>
  38 #include <linux/delay.h>
  39
  40 #include <asm/io.h>
  41
  42 #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
  43 #define SVWKS_CSB6_REVISION     0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
  44
  45 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5
  46  * can overrun their FIFOs when used with the CSB5 */
  47 static const char *svwks_bad_ata100[] = {
  48         "ST320011A",
  49         "ST340016A",
  50         "ST360021A",
  51         "ST380021A",
  52         NULL
  53 };
  54
  55 static u8 svwks_revision = 0;
  56 static struct pci_dev *isa_dev;
  57
  58 static int check_in_drive_lists (ide_drive_t *drive, const char **list)
  59 {
  60         while (*list)
  61                 if (!strcmp(*list++, drive->id->model))
  62                         return 1;
  63         return 0;
  64 }
  65
  66 static u8 svwks_ratemask (ide_drive_t *drive)
  67 {
  68         struct pci_dev *dev     = HWIF(drive)->pci_dev;
  69         u8 mode;
  70
  71         if (!svwks_revision)
  72                 pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);
  73
  74         if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
  75                 u32 reg = 0;
  76                 if (isa_dev)
  77                         pci_read_config_dword(isa_dev, 0x64, &reg);
  78
  79                 /*
  80                  *      Don't enable UDMA on disk devices for the moment
  81                  */
  82                 if(drive->media == ide_disk)
  83                         return 0;
  84                 /* Check the OSB4 DMA33 enable bit */
  85                 return ((reg & 0x00004000) == 0x00004000) ? 1 : 0;
  86         } else if (svwks_revision < SVWKS_CSB5_REVISION_NEW) {
  87                 return 1;
  88         } else if (svwks_revision >= SVWKS_CSB5_REVISION_NEW) {
  89                 u8 btr = 0;
  90                 pci_read_config_byte(dev, 0x5A, &btr);
  91                 mode = btr & 0x3;
  92                 if (!eighty_ninty_three(drive))
  93                         mode = min(mode, (u8)1);
  94                 /* If someone decides to do UDMA133 on CSB5 the same
  95                    issue will bite so be inclusive */
  96                 if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
  97                         mode = 2;
  98         }
  99         if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 100              (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
 101             (!(PCI_FUNC(dev->devfn) & 1)))
 102                 mode = 2;
 103         return mode;
 104 }
 105
 106 static u8 svwks_csb_check (struct pci_dev *dev)
 107 {
 108         switch (dev->device) {
 109                 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
 110                 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
 111                 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
 112                         return 1;
 113                 default:
 114                         break;
 115         }
 116         return 0;
 117 }
 118 static int svwks_tune_chipset (ide_drive_t *drive, u8 xferspeed)
 119 {
 120         u8 udma_modes[]         = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
 121         u8 dma_modes[]          = { 0x77, 0x21, 0x20 };
 122         u8 pio_modes[]          = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
 123         u8 drive_pci[]          = { 0x41, 0x40, 0x43, 0x42 };
 124         u8 drive_pci2[]         = { 0x45, 0x44, 0x47, 0x46 };
 125
 126         ide_hwif_t *hwif        = HWIF(drive);
 127         struct pci_dev *dev     = hwif->pci_dev;
 128         u8 speed;
 129         u8 pio                  = ide_get_best_pio_mode(drive, 255, 5, NULL);
 130         u8 unit                 = (drive->select.b.unit & 0x01);
 131         u8 csb5                 = svwks_csb_check(dev);
 132         u8 ultra_enable         = 0, ultra_timing = 0;
 133         u8 dma_timing           = 0, pio_timing = 0;
 134         u16 csb5_pio            = 0;
 135
 136         if (xferspeed == 255)   /* PIO auto-tuning */
 137                 speed = XFER_PIO_0 + pio;
 138         else
 139                 speed = ide_rate_filter(svwks_ratemask(drive), xferspeed);
 140
 141         /* If we are about to put a disk into UDMA mode we screwed up.
 142            Our code assumes we never _ever_ do this on an OSB4 */
 143
 144         if(dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4 &&
 145                 drive->media == ide_disk && speed >= XFER_UDMA_0)
 146                         BUG();
 147
 148         pci_read_config_byte(dev, drive_pci[drive->dn], &pio_timing);
 149         pci_read_config_byte(dev, drive_pci2[drive->dn], &dma_timing);
 150         pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
 151         pci_read_config_word(dev, 0x4A, &csb5_pio);
 152         pci_read_config_byte(dev, 0x54, &ultra_enable);
 153
 154         /* Per Specified Design by OEM, and ASIC Architect */
 155         if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 156             (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
 157                 if (!drive->init_speed) {
 158                         u8 dma_stat = hwif->INB(hwif->dma_status);
 159
 160 dma_pio:
 161                         if (((ultra_enable << (7-drive->dn) & 0x80) == 0x80) &&
 162                             ((dma_stat & (1<<(5+unit))) == (1<<(5+unit)))) {
 163                                 drive->current_speed = drive->init_speed = XFER_UDMA_0 + udma_modes[(ultra_timing >> (4*unit)) & ~(0xF0)];
 164                                 return 0;
 165                         } else if ((dma_timing) &&
 166                                    ((dma_stat&(1<<(5+unit)))==(1<<(5+unit)))) {
 167                                 u8 dmaspeed = dma_timing;
 168
 169                                 dma_timing &= ~0xFF;
 170                                 if ((dmaspeed & 0x20) == 0x20)
 171                                         dmaspeed = XFER_MW_DMA_2;
 172                                 else if ((dmaspeed & 0x21) == 0x21)
 173                                         dmaspeed = XFER_MW_DMA_1;
 174                                 else if ((dmaspeed & 0x77) == 0x77)
 175                                         dmaspeed = XFER_MW_DMA_0;
 176                                 else
 177                                         goto dma_pio;
 178                                 drive->current_speed = drive->init_speed = dmaspeed;
 179                                 return 0;
 180                         } else if (pio_timing) {
 181                                 u8 piospeed = pio_timing;
 182
 183                                 pio_timing &= ~0xFF;
 184                                 if ((piospeed & 0x20) == 0x20)
 185                                         piospeed = XFER_PIO_4;
 186                                 else if ((piospeed & 0x22) == 0x22)
 187                                         piospeed = XFER_PIO_3;
 188                                 else if ((piospeed & 0x34) == 0x34)
 189                                         piospeed = XFER_PIO_2;
 190                                 else if ((piospeed & 0x47) == 0x47)
 191                                         piospeed = XFER_PIO_1;
 192                                 else if ((piospeed & 0x5d) == 0x5d)
 193                                         piospeed = XFER_PIO_0;
 194                                 else
 195                                         goto oem_setup_failed;
 196                                 drive->current_speed = drive->init_speed = piospeed;
 197                                 return 0;
 198                         }
 199                 }
 200         }
 201
 202 oem_setup_failed:
 203
 204         pio_timing      &= ~0xFF;
 205         dma_timing      &= ~0xFF;
 206         ultra_timing    &= ~(0x0F << (4*unit));
 207         ultra_enable    &= ~(0x01 << drive->dn);
 208         csb5_pio        &= ~(0x0F << (4*drive->dn));
 209
 210         switch(speed) {
 211                 case XFER_PIO_4:
 212                 case XFER_PIO_3:
 213                 case XFER_PIO_2:
 214                 case XFER_PIO_1:
 215                 case XFER_PIO_0:
 216                         pio_timing |= pio_modes[speed - XFER_PIO_0];
 217                         csb5_pio   |= ((speed - XFER_PIO_0) << (4*drive->dn));
 218                         break;
 219
 220                 case XFER_MW_DMA_2:
 221                 case XFER_MW_DMA_1:
 222                 case XFER_MW_DMA_0:
 223                         pio_timing |= pio_modes[pio];
 224                         csb5_pio   |= (pio << (4*drive->dn));
 225                         dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
 226                         break;
 227
 228                 case XFER_UDMA_5:
 229                 case XFER_UDMA_4:
 230                 case XFER_UDMA_3:
 231                 case XFER_UDMA_2:
 232                 case XFER_UDMA_1:
 233                 case XFER_UDMA_0:
 234                         pio_timing   |= pio_modes[pio];
 235                         csb5_pio     |= (pio << (4*drive->dn));
 236                         dma_timing   |= dma_modes[2];
 237                         ultra_timing |= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit));
 238                         ultra_enable |= (0x01 << drive->dn);
 239                 default:
 240                         break;
 241         }
 242
 243         pci_write_config_byte(dev, drive_pci[drive->dn], pio_timing);
 244         if (csb5)
 245                 pci_write_config_word(dev, 0x4A, csb5_pio);
 246
 247         pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
 248         pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
 249         pci_write_config_byte(dev, 0x54, ultra_enable);
 250
 251         return (ide_config_drive_speed(drive, speed));
 252 }
 253
 254 static void config_chipset_for_pio (ide_drive_t *drive)
 255 {
 256         u16 eide_pio_timing[6] = {960, 480, 240, 180, 120, 90};
 257         u16 xfer_pio = drive->id->eide_pio_modes;
 258         u8 timing, speed, pio;
 259
 260         pio = ide_get_best_pio_mode(drive, 255, 5, NULL);
 261
 262         if (xfer_pio > 4)
 263                 xfer_pio = 0;
 264
 265         if (drive->id->eide_pio_iordy > 0)
 266                 for (xfer_pio = 5;
 267                         xfer_pio>0 &&
 268                         drive->id->eide_pio_iordy>eide_pio_timing[xfer_pio];
 269                         xfer_pio--);
 270         else
 271                 xfer_pio = (drive->id->eide_pio_modes & 4) ? 0x05 :
 272                            (drive->id->eide_pio_modes & 2) ? 0x04 :
 273                            (drive->id->eide_pio_modes & 1) ? 0x03 :
 274                            (drive->id->tPIO & 2) ? 0x02 :
 275                            (drive->id->tPIO & 1) ? 0x01 : xfer_pio;
 276
 277         timing = (xfer_pio >= pio) ? xfer_pio : pio;
 278
 279         switch(timing) {
 280                 case 4: speed = XFER_PIO_4;break;
 281                 case 3: speed = XFER_PIO_3;break;
 282                 case 2: speed = XFER_PIO_2;break;
 283                 case 1: speed = XFER_PIO_1;break;
 284                 default:
 285                         speed = (!drive->id->tPIO) ? XFER_PIO_0 : XFER_PIO_SLOW;
 286                         break;
 287         }
 288         (void) svwks_tune_chipset(drive, speed);
 289         drive->current_speed = speed;
 290 }
 291
 292 static void svwks_tune_drive (ide_drive_t *drive, u8 pio)
 293 {
 294         if(pio == 255)
 295                 (void) svwks_tune_chipset(drive, 255);
 296         else
 297                 (void) svwks_tune_chipset(drive, (XFER_PIO_0 + pio));
 298 }
 299
 300 static int config_chipset_for_dma (ide_drive_t *drive)
 301 {
 302         u8 speed = ide_dma_speed(drive, svwks_ratemask(drive));
 303
 304         if (!(speed))
 305                 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);
 306
 307         (void) svwks_tune_chipset(drive, speed);
 308         return ide_dma_enable(drive);
 309 }
 310
 311 static int svwks_config_drive_xfer_rate (ide_drive_t *drive)
 312 {
 313         ide_hwif_t *hwif        = HWIF(drive);
 314         struct hd_driveid *id   = drive->id;
 315
 316         drive->init_speed = 0;
 317
 318         if ((id->capability & 1) && drive->autodma) {
 319
 320                 if (ide_use_dma(drive)) {
 321                         if (config_chipset_for_dma(drive))
 322                                 return hwif->ide_dma_on(drive);
 323                 }
 324
 325                 goto fast_ata_pio;
 326
 327         } else if ((id->capability & 8) || (id->field_valid & 2)) {
 328 fast_ata_pio:
 329                 config_chipset_for_pio(drive);
 330                 //      hwif->tuneproc(drive, 5);
 331                 return hwif->ide_dma_off_quietly(drive);
 332         }
 333         /* IORDY not supported */
 334         return 0;
 335 }
 336
 337 /* This can go soon */
 338
 339 static int svwks_ide_dma_end (ide_drive_t *drive)
 340 {
 341         return __ide_dma_end(drive);
 342 }
 343
 344 static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const char *name)
 345 {
 346         unsigned int reg;
 347         u8 btr;
 348
 349         /* save revision id to determine DMA capability */
 350         pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);
 351
 352         /* force Master Latency Timer value to 64 PCICLKs */
 353         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
 354
 355         /* OSB4 : South Bridge and IDE */
 356         if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
 357                 isa_dev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 358                           PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
 359                 if (isa_dev) {
 360                         pci_read_config_dword(isa_dev, 0x64, &reg);
 361                         reg &= ~0x00002000; /* disable 600ns interrupt mask */
 362                         if(!(reg & 0x00004000))
 363                                 printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
 364                         reg |=  0x00004000; /* enable UDMA/33 support */
 365                         pci_write_config_dword(isa_dev, 0x64, reg);
 366                 }
 367         }
 368
 369         /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
 370         else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
 371                  (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 372                  (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
 373
 374                 /* Third Channel Test */
 375                 if (!(PCI_FUNC(dev->devfn) & 1)) {
 376                         struct pci_dev * findev = NULL;
 377                         u32 reg4c = 0;
 378                         findev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 379                                 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
 380                         if (findev) {
 381                                 pci_read_config_dword(findev, 0x4C, &reg4c);
 382                                 reg4c &= ~0x000007FF;
 383                                 reg4c |=  0x00000040;
 384                                 reg4c |=  0x00000020;
 385                                 pci_write_config_dword(findev, 0x4C, reg4c);
 386                         }
 387                         outb_p(0x06, 0x0c00);
 388                         dev->irq = inb_p(0x0c01);
 389 #if 0
 390                         printk("%s: device class (0x%04x)\n",
 391                                 name, dev->class);
 392                         if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
 393                                 dev->class &= ~0x000F0F00;
 394                 //              dev->class |= ~0x00000400;
 395                                 dev->class |= ~0x00010100;
 396                                 /**/
 397                         }
 398 #endif
 399                 } else {
 400                         struct pci_dev * findev = NULL;
 401                         u8 reg41 = 0;
 402
 403                         findev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 404                                         PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
 405                         if (findev) {
 406                                 pci_read_config_byte(findev, 0x41, &reg41);
 407                                 reg41 &= ~0x40;
 408                                 pci_write_config_byte(findev, 0x41, reg41);
 409                         }
 410                         /*
 411                          * This is a device pin issue on CSB6.
 412                          * Since there will be a future raid mode,
 413                          * early versions of the chipset require the
 414                          * interrupt pin to be set, and it is a compatibility
 415                          * mode issue.
 416                          */
 417                         if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
 418                                 dev->irq = 0;
 419                 }
 420 //              pci_read_config_dword(dev, 0x40, &pioreg)
 421 //              pci_write_config_dword(dev, 0x40, 0x99999999);
 422 //              pci_read_config_dword(dev, 0x44, &dmareg);
 423 //              pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
 424                 /* setup the UDMA Control register
 425                  *
 426                  * 1. clear bit 6 to enable DMA
 427                  * 2. enable DMA modes with bits 0-1
 428                  *      00 : legacy
 429                  *      01 : udma2
 430                  *      10 : udma2/udma4
 431                  *      11 : udma2/udma4/udma5
 432                  */
 433                 pci_read_config_byte(dev, 0x5A, &btr);
 434                 btr &= ~0x40;
 435                 if (!(PCI_FUNC(dev->devfn) & 1))
 436                         btr |= 0x2;
 437                 else
 438                         btr |= (svwks_revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
 439                 pci_write_config_byte(dev, 0x5A, btr);
 440         }
 441
 442         return (dev->irq) ? dev->irq : 0;
 443 }
 444
 445 static unsigned int __init ata66_svwks_svwks (ide_hwif_t *hwif)
 446 {
 447         return 1;
 448 }
 449
 450 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
 451  * of the subsystem device ID indicate presence of an 80-pin cable.
 452  * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
 453  * Bit 15 set   = secondary IDE channel has 80-pin cable.
 454  * Bit 14 clear = primary IDE channel does not have 80-pin cable.
 455  * Bit 14 set   = primary IDE channel has 80-pin cable.
 456  */
 457 static unsigned int __init ata66_svwks_dell (ide_hwif_t *hwif)
 458 {
 459         struct pci_dev *dev = hwif->pci_dev;
 460         if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
 461             dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
 462             (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
 463              dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
 464                 return ((1 << (hwif->channel + 14)) &
 465                         dev->subsystem_device) ? 1 : 0;
 466         return 0;
 467 }
 468
 469 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
 470  * detect issue by attaching the drives directly to the board.
 471  * This check follows the Dell precedent (how scary is that?!)
 472  *
 473  * WARNING: this only works on Alpine hardware!
 474  */
 475 static unsigned int __init ata66_svwks_cobalt (ide_hwif_t *hwif)
 476 {
 477         struct pci_dev *dev = hwif->pci_dev;
 478         if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
 479             dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
 480             dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
 481                 return ((1 << (hwif->channel + 14)) &
 482                         dev->subsystem_device) ? 1 : 0;
 483         return 0;
 484 }
 485
 486 static unsigned int __init ata66_svwks (ide_hwif_t *hwif)
 487 {
 488         struct pci_dev *dev = hwif->pci_dev;
 489
 490         /* Per Specified Design by OEM, and ASIC Architect */
 491         if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 492             (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
 493                 return 1;
 494
 495         /* Server Works */
 496         if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
 497                 return ata66_svwks_svwks (hwif);
 498
 499         /* Dell PowerEdge */
 500         if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
 501                 return ata66_svwks_dell (hwif);
 502
 503         /* Cobalt Alpine */
 504         if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
 505                 return ata66_svwks_cobalt (hwif);
 506
 507         return 0;
 508 }
 509
 510 #undef CAN_SW_DMA
 511 static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
 512 {
 513         u8 dma_stat = 0;
 514
 515         if (!hwif->irq)
 516                 hwif->irq = hwif->channel ? 15 : 14;
 517
 518         hwif->tuneproc = &svwks_tune_drive;
 519         hwif->speedproc = &svwks_tune_chipset;
 520
 521         hwif->atapi_dma = 1;
 522
 523         if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
 524                 hwif->ultra_mask = 0x3f;
 525
 526         hwif->mwdma_mask = 0x07;
 527 #ifdef CAN_SW_DMA
 528         hwif->swdma_mask = 0x07;
 529 #endif /* CAN_SW_DMA */
 530
 531         hwif->autodma = 0;
 532
 533         if (!hwif->dma_base) {
 534                 hwif->drives[0].autotune = 1;
 535                 hwif->drives[1].autotune = 1;
 536                 return;
 537         }
 538
 539         hwif->ide_dma_check = &svwks_config_drive_xfer_rate;
 540         if (hwif->pci_dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
 541                 hwif->ide_dma_end = &svwks_ide_dma_end;
 542         else if (!(hwif->udma_four))
 543                 hwif->udma_four = ata66_svwks(hwif);
 544         if (!noautodma)
 545                 hwif->autodma = 1;
 546
 547         dma_stat = hwif->INB(hwif->dma_status);
 548         hwif->drives[0].autodma = (dma_stat & 0x20);
 549         hwif->drives[1].autodma = (dma_stat & 0x40);
 550         hwif->drives[0].autotune = (!(dma_stat & 0x20));
 551         hwif->drives[1].autotune = (!(dma_stat & 0x40));
 552 //      hwif->drives[0].autodma = hwif->autodma;
 553 //      hwif->drives[1].autodma = hwif->autodma;
 554 }
 555
 556 /*
 557  * We allow the BM-DMA driver to only work on enabled interfaces.
 558  */
 559 static void __devinit init_dma_svwks (ide_hwif_t *hwif, unsigned long dmabase)
 560 {
 561         struct pci_dev *dev = hwif->pci_dev;
 562
 563         if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 564              (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
 565             (!(PCI_FUNC(dev->devfn) & 1)) && (hwif->channel))
 566                 return;
 567
 568         ide_setup_dma(hwif, dmabase, 8);
 569 }
 570
 571 static int __devinit init_setup_svwks (struct pci_dev *dev, ide_pci_device_t *d)
 572 {
 573         return ide_setup_pci_device(dev, d);
 574 }
 575
 576 static int __init init_setup_csb6 (struct pci_dev *dev, ide_pci_device_t *d)
 577 {
 578         if (!(PCI_FUNC(dev->devfn) & 1)) {
 579                 d->bootable = NEVER_BOARD;
 580                 if (dev->resource[0].start == 0x01f1)
 581                         d->bootable = ON_BOARD;
 582         }
 583 #if 0
 584         if ((IDE_PCI_DEVID_EQ(d->devid, DEVID_CSB6) &&
 585              (!(PCI_FUNC(dev->devfn) & 1)))
 586                 d->autodma = AUTODMA;
 587 #endif
 588
 589         d->channels = ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE ||
 590                         dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2) &&
 591                        (!(PCI_FUNC(dev->devfn) & 1))) ? 1 : 2;
 592
 593         return ide_setup_pci_device(dev, d);
 594 }
 595
 596 static ide_pci_device_t serverworks_chipsets[] __devinitdata = {
 597         {       /* 0 */
 598                 .name           = "SvrWks OSB4",
 599                 .init_setup     = init_setup_svwks,
 600                 .init_chipset   = init_chipset_svwks,
 601                 .init_hwif      = init_hwif_svwks,
 602                 .channels       = 2,
 603                 .autodma        = AUTODMA,
 604                 .bootable       = ON_BOARD,
 605         },{     /* 1 */
 606                 .name           = "SvrWks CSB5",
 607                 .init_setup     = init_setup_svwks,
 608                 .init_chipset   = init_chipset_svwks,
 609                 .init_hwif      = init_hwif_svwks,
 610                 .init_dma       = init_dma_svwks,
 611                 .channels       = 2,
 612                 .autodma        = AUTODMA,
 613                 .bootable       = ON_BOARD,
 614         },{     /* 2 */
 615                 .name           = "SvrWks CSB6",
 616                 .init_setup     = init_setup_csb6,
 617                 .init_chipset   = init_chipset_svwks,
 618                 .init_hwif      = init_hwif_svwks,
 619                 .init_dma       = init_dma_svwks,
 620                 .channels       = 2,
 621                 .autodma        = AUTODMA,
 622                 .bootable       = ON_BOARD,
 623         },{     /* 3 */
 624                 .name           = "SvrWks CSB6",
 625                 .init_setup     = init_setup_csb6,
 626                 .init_chipset   = init_chipset_svwks,
 627                 .init_hwif      = init_hwif_svwks,
 628                 .init_dma       = init_dma_svwks,
 629                 .channels       = 1,    /* 2 */
 630                 .autodma        = AUTODMA,
 631                 .bootable       = ON_BOARD,
 632         }
 633 };
 634
 635 /**
 636  *      svwks_init_one  -       called when a OSB/CSB is found
 637  *      @dev: the svwks device
 638  *      @id: the matching pci id
 639  *
 640  *      Called when the PCI registration layer (or the IDE initialization)
 641  *      finds a device matching our IDE device tables.
 642  */
 643
 644 static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 645 {
 646         ide_pci_device_t *d = &serverworks_chipsets[id->driver_data];
 647
 648         return d->init_setup(dev, d);
 649 }
 650
 651 static struct pci_device_id svwks_pci_tbl[] = {
 652         { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 653         { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
 654         { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
 655         { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
 656         { 0, },
 657 };
 658 MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
 659
 660 static struct pci_driver driver = {
 661         .name           = "Serverworks_IDE",
 662         .id_table       = svwks_pci_tbl,
 663         .probe          = svwks_init_one,
 664 };
 665
 666 static int svwks_ide_init(void)
 667 {
 668         return ide_pci_register_driver(&driver);
 669 }
 670
 671 module_init(svwks_ide_init);
 672
 673 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
 674 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
 675 MODULE_LICENSE("GPL");