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 #include "serverworks.h"
  43
  44 static u8 svwks_revision = 0;
  45 static struct pci_dev *isa_dev;
  46
  47 #if defined(DISPLAY_SVWKS_TIMINGS) && defined(CONFIG_PROC_FS)
  48 #include <linux/stat.h>
  49 #include <linux/proc_fs.h>
  50
  51 static u8 svwks_proc = 0;
  52 #define SVWKS_MAX_DEVS          2
  53 static struct pci_dev *svwks_devs[SVWKS_MAX_DEVS];
  54 static int n_svwks_devs;
  55
  56 static int svwks_get_info (char *buffer, char **addr, off_t offset, int count)
  57 {
  58         char *p = buffer;
  59         int i, len;
  60
  61         p += sprintf(p, "\n                             "
  62                         "ServerWorks OSB4/CSB5/CSB6\n");
  63
  64         for (i = 0; i < n_svwks_devs; i++) {
  65                 struct pci_dev *dev = svwks_devs[i];
  66                 unsigned long bibma = pci_resource_start(dev, 4);
  67                 u32 reg40, reg44;
  68                 u16 reg48, reg56;
  69                 u8  reg54, c0=0, c1=0;
  70
  71                 pci_read_config_dword(dev, 0x40, &reg40);
  72                 pci_read_config_dword(dev, 0x44, &reg44);
  73                 pci_read_config_word(dev, 0x48, &reg48);
  74                 pci_read_config_byte(dev, 0x54, &reg54);
  75                 pci_read_config_word(dev, 0x56, &reg56);
  76
  77                 /*
  78                  * at that point bibma+0x2 et bibma+0xa are byte registers
  79                  * to investigate:
  80                  */
  81                 c0 = inb_p(bibma + 0x02);
  82                 c1 = inb_p(bibma + 0x0a);
  83
  84                 p += sprintf(p, "\n                            ServerWorks ");
  85                 switch(dev->device) {
  86                         case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
  87                         case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
  88                                 p += sprintf(p, "CSB6 ");
  89                                 break;
  90                         case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
  91                                 p += sprintf(p, "CSB5 ");
  92                                 break;
  93                         case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE:
  94                                 p += sprintf(p, "OSB4 ");
  95                                 break;
  96                         default:
  97                                 p += sprintf(p, "%04x ", dev->device);
  98                                 break;
  99                 }
 100                 p += sprintf(p, "Chipset (rev %02x)\n", svwks_revision);
 101
 102                 p += sprintf(p, "------------------------------- "
 103                                 "General Status "
 104                                 "---------------------------------\n");
 105                 p += sprintf(p, "--------------- Primary Channel "
 106                                 "---------------- Secondary Channel "
 107                                 "-------------\n");
 108                 p += sprintf(p, "                %sabled"
 109                                 "                         %sabled\n",
 110                                 (c0&0x80) ? "dis" : " en",
 111                                 (c1&0x80) ? "dis" : " en");
 112                 p += sprintf(p, "--------------- drive0 --------- drive1 "
 113                                 "-------- drive0 ---------- drive1 ------\n");
 114                 p += sprintf(p, "DMA enabled:    %s              %s"
 115                                 "             %s               %s\n",
 116                         (c0&0x20) ? "yes" : "no ",
 117                         (c0&0x40) ? "yes" : "no ",
 118                         (c1&0x20) ? "yes" : "no ",
 119                         (c1&0x40) ? "yes" : "no " );
 120                 p += sprintf(p, "UDMA enabled:   %s              %s"
 121                                 "             %s               %s\n",
 122                         (reg54 & 0x01) ? "yes" : "no ",
 123                         (reg54 & 0x02) ? "yes" : "no ",
 124                         (reg54 & 0x04) ? "yes" : "no ",
 125                         (reg54 & 0x08) ? "yes" : "no " );
 126                 p += sprintf(p, "UDMA enabled:   %s                %s"
 127                                 "               %s                 %s\n",
 128                         ((reg56&0x0005)==0x0005)?"5":
 129                                 ((reg56&0x0004)==0x0004)?"4":
 130                                 ((reg56&0x0003)==0x0003)?"3":
 131                                 ((reg56&0x0002)==0x0002)?"2":
 132                                 ((reg56&0x0001)==0x0001)?"1":
 133                                 ((reg56&0x000F))?"?":"0",
 134                         ((reg56&0x0050)==0x0050)?"5":
 135                                 ((reg56&0x0040)==0x0040)?"4":
 136                                 ((reg56&0x0030)==0x0030)?"3":
 137                                 ((reg56&0x0020)==0x0020)?"2":
 138                                 ((reg56&0x0010)==0x0010)?"1":
 139                                 ((reg56&0x00F0))?"?":"0",
 140                         ((reg56&0x0500)==0x0500)?"5":
 141                                 ((reg56&0x0400)==0x0400)?"4":
 142                                 ((reg56&0x0300)==0x0300)?"3":
 143                                 ((reg56&0x0200)==0x0200)?"2":
 144                                 ((reg56&0x0100)==0x0100)?"1":
 145                                 ((reg56&0x0F00))?"?":"0",
 146                         ((reg56&0x5000)==0x5000)?"5":
 147                                 ((reg56&0x4000)==0x4000)?"4":
 148                                 ((reg56&0x3000)==0x3000)?"3":
 149                                 ((reg56&0x2000)==0x2000)?"2":
 150                                 ((reg56&0x1000)==0x1000)?"1":
 151                                 ((reg56&0xF000))?"?":"0");
 152                 p += sprintf(p, "DMA enabled:    %s                %s"
 153                                 "               %s                 %s\n",
 154                         ((reg44&0x00002000)==0x00002000)?"2":
 155                                 ((reg44&0x00002100)==0x00002100)?"1":
 156                                 ((reg44&0x00007700)==0x00007700)?"0":
 157                                 ((reg44&0x0000FF00)==0x0000FF00)?"X":"?",
 158                         ((reg44&0x00000020)==0x00000020)?"2":
 159                                 ((reg44&0x00000021)==0x00000021)?"1":
 160                                 ((reg44&0x00000077)==0x00000077)?"0":
 161                                 ((reg44&0x000000FF)==0x000000FF)?"X":"?",
 162                         ((reg44&0x20000000)==0x20000000)?"2":
 163                                 ((reg44&0x21000000)==0x21000000)?"1":
 164                                 ((reg44&0x77000000)==0x77000000)?"0":
 165                                 ((reg44&0xFF000000)==0xFF000000)?"X":"?",
 166                         ((reg44&0x00200000)==0x00200000)?"2":
 167                                 ((reg44&0x00210000)==0x00210000)?"1":
 168                                 ((reg44&0x00770000)==0x00770000)?"0":
 169                                 ((reg44&0x00FF0000)==0x00FF0000)?"X":"?");
 170
 171                 p += sprintf(p, "PIO  enabled:   %s                %s"
 172                                 "               %s                 %s\n",
 173                         ((reg40&0x00002000)==0x00002000)?"4":
 174                                 ((reg40&0x00002200)==0x00002200)?"3":
 175                                 ((reg40&0x00003400)==0x00003400)?"2":
 176                                 ((reg40&0x00004700)==0x00004700)?"1":
 177                                 ((reg40&0x00005D00)==0x00005D00)?"0":"?",
 178                         ((reg40&0x00000020)==0x00000020)?"4":
 179                                 ((reg40&0x00000022)==0x00000022)?"3":
 180                                 ((reg40&0x00000034)==0x00000034)?"2":
 181                                 ((reg40&0x00000047)==0x00000047)?"1":
 182                                 ((reg40&0x0000005D)==0x0000005D)?"0":"?",
 183                         ((reg40&0x20000000)==0x20000000)?"4":
 184                                 ((reg40&0x22000000)==0x22000000)?"3":
 185                                 ((reg40&0x34000000)==0x34000000)?"2":
 186                                 ((reg40&0x47000000)==0x47000000)?"1":
 187                                 ((reg40&0x5D000000)==0x5D000000)?"0":"?",
 188                         ((reg40&0x00200000)==0x00200000)?"4":
 189                                 ((reg40&0x00220000)==0x00220000)?"3":
 190                                 ((reg40&0x00340000)==0x00340000)?"2":
 191                                 ((reg40&0x00470000)==0x00470000)?"1":
 192                                 ((reg40&0x005D0000)==0x005D0000)?"0":"?");
 193
 194         }
 195         p += sprintf(p, "\n");
 196
 197         /* p - buffer must be less than 4k! */
 198         len = (p - buffer) - offset;
 199         *addr = buffer + offset;
 200
 201         return len > count ? count : len;
 202 }
 203 #endif  /* defined(DISPLAY_SVWKS_TIMINGS) && defined(CONFIG_PROC_FS) */
 204
 205 static int check_in_drive_lists (ide_drive_t *drive, const char **list)
 206 {
 207         while (*list)
 208                 if (!strcmp(*list++, drive->id->model))
 209                         return 1;
 210         return 0;
 211 }
 212
 213 static u8 svwks_ratemask (ide_drive_t *drive)
 214 {
 215         struct pci_dev *dev     = HWIF(drive)->pci_dev;
 216         u8 mode;
 217
 218         if (!svwks_revision)
 219                 pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);
 220
 221         if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
 222                 u32 reg = 0;
 223                 if (isa_dev)
 224                         pci_read_config_dword(isa_dev, 0x64, &reg);
 225
 226                 /*
 227                  *      Don't enable UDMA on disk devices for the moment
 228                  */
 229                 if(drive->media == ide_disk)
 230                         return 0;
 231                 /* Check the OSB4 DMA33 enable bit */
 232                 return ((reg & 0x00004000) == 0x00004000) ? 1 : 0;
 233         } else if (svwks_revision < SVWKS_CSB5_REVISION_NEW) {
 234                 return 1;
 235         } else if (svwks_revision >= SVWKS_CSB5_REVISION_NEW) {
 236                 u8 btr = 0;
 237                 pci_read_config_byte(dev, 0x5A, &btr);
 238                 mode = btr & 0x3;
 239                 if (!eighty_ninty_three(drive))
 240                         mode = min(mode, (u8)1);
 241                 /* If someone decides to do UDMA133 on CSB5 the same
 242                    issue will bite so be inclusive */
 243                 if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
 244                         mode = 2;
 245         }
 246         if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 247              (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
 248             (!(PCI_FUNC(dev->devfn) & 1)))
 249                 mode = 2;
 250         return mode;
 251 }
 252
 253 static u8 svwks_csb_check (struct pci_dev *dev)
 254 {
 255         switch (dev->device) {
 256                 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
 257                 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
 258                 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
 259                         return 1;
 260                 default:
 261                         break;
 262         }
 263         return 0;
 264 }
 265 static int svwks_tune_chipset (ide_drive_t *drive, u8 xferspeed)
 266 {
 267         u8 udma_modes[]         = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
 268         u8 dma_modes[]          = { 0x77, 0x21, 0x20 };
 269         u8 pio_modes[]          = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
 270         u8 drive_pci[]          = { 0x41, 0x40, 0x43, 0x42 };
 271         u8 drive_pci2[]         = { 0x45, 0x44, 0x47, 0x46 };
 272
 273         ide_hwif_t *hwif        = HWIF(drive);
 274         struct pci_dev *dev     = hwif->pci_dev;
 275         u8 speed;
 276         u8 pio                  = ide_get_best_pio_mode(drive, 255, 5, NULL);
 277         u8 unit                 = (drive->select.b.unit & 0x01);
 278         u8 csb5                 = svwks_csb_check(dev);
 279         u8 ultra_enable         = 0, ultra_timing = 0;
 280         u8 dma_timing           = 0, pio_timing = 0;
 281         u16 csb5_pio            = 0;
 282
 283         if (xferspeed == 255)   /* PIO auto-tuning */
 284                 speed = XFER_PIO_0 + pio;
 285         else
 286                 speed = ide_rate_filter(svwks_ratemask(drive), xferspeed);
 287
 288         /* If we are about to put a disk into UDMA mode we screwed up.
 289            Our code assumes we never _ever_ do this on an OSB4 */
 290
 291         if(dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4 &&
 292                 drive->media == ide_disk && speed >= XFER_UDMA_0)
 293                         BUG();
 294
 295         pci_read_config_byte(dev, drive_pci[drive->dn], &pio_timing);
 296         pci_read_config_byte(dev, drive_pci2[drive->dn], &dma_timing);
 297         pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
 298         pci_read_config_word(dev, 0x4A, &csb5_pio);
 299         pci_read_config_byte(dev, 0x54, &ultra_enable);
 300
 301         /* Per Specified Design by OEM, and ASIC Architect */
 302         if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 303             (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
 304                 if (!drive->init_speed) {
 305                         u8 dma_stat = hwif->INB(hwif->dma_status);
 306
 307 dma_pio:
 308                         if (((ultra_enable << (7-drive->dn) & 0x80) == 0x80) &&
 309                             ((dma_stat & (1<<(5+unit))) == (1<<(5+unit)))) {
 310                                 drive->current_speed = drive->init_speed = XFER_UDMA_0 + udma_modes[(ultra_timing >> (4*unit)) & ~(0xF0)];
 311                                 return 0;
 312                         } else if ((dma_timing) &&
 313                                    ((dma_stat&(1<<(5+unit)))==(1<<(5+unit)))) {
 314                                 u8 dmaspeed = dma_timing;
 315
 316                                 dma_timing &= ~0xFF;
 317                                 if ((dmaspeed & 0x20) == 0x20)
 318                                         dmaspeed = XFER_MW_DMA_2;
 319                                 else if ((dmaspeed & 0x21) == 0x21)
 320                                         dmaspeed = XFER_MW_DMA_1;
 321                                 else if ((dmaspeed & 0x77) == 0x77)
 322                                         dmaspeed = XFER_MW_DMA_0;
 323                                 else
 324                                         goto dma_pio;
 325                                 drive->current_speed = drive->init_speed = dmaspeed;
 326                                 return 0;
 327                         } else if (pio_timing) {
 328                                 u8 piospeed = pio_timing;
 329
 330                                 pio_timing &= ~0xFF;
 331                                 if ((piospeed & 0x20) == 0x20)
 332                                         piospeed = XFER_PIO_4;
 333                                 else if ((piospeed & 0x22) == 0x22)
 334                                         piospeed = XFER_PIO_3;
 335                                 else if ((piospeed & 0x34) == 0x34)
 336                                         piospeed = XFER_PIO_2;
 337                                 else if ((piospeed & 0x47) == 0x47)
 338                                         piospeed = XFER_PIO_1;
 339                                 else if ((piospeed & 0x5d) == 0x5d)
 340                                         piospeed = XFER_PIO_0;
 341                                 else
 342                                         goto oem_setup_failed;
 343                                 drive->current_speed = drive->init_speed = piospeed;
 344                                 return 0;
 345                         }
 346                 }
 347         }
 348
 349 oem_setup_failed:
 350
 351         pio_timing      &= ~0xFF;
 352         dma_timing      &= ~0xFF;
 353         ultra_timing    &= ~(0x0F << (4*unit));
 354         ultra_enable    &= ~(0x01 << drive->dn);
 355         csb5_pio        &= ~(0x0F << (4*drive->dn));
 356
 357         switch(speed) {
 358                 case XFER_PIO_4:
 359                 case XFER_PIO_3:
 360                 case XFER_PIO_2:
 361                 case XFER_PIO_1:
 362                 case XFER_PIO_0:
 363                         pio_timing |= pio_modes[speed - XFER_PIO_0];
 364                         csb5_pio   |= ((speed - XFER_PIO_0) << (4*drive->dn));
 365                         break;
 366
 367                 case XFER_MW_DMA_2:
 368                 case XFER_MW_DMA_1:
 369                 case XFER_MW_DMA_0:
 370                         pio_timing |= pio_modes[pio];
 371                         csb5_pio   |= (pio << (4*drive->dn));
 372                         dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
 373                         break;
 374
 375                 case XFER_UDMA_5:
 376                 case XFER_UDMA_4:
 377                 case XFER_UDMA_3:
 378                 case XFER_UDMA_2:
 379                 case XFER_UDMA_1:
 380                 case XFER_UDMA_0:
 381                         pio_timing   |= pio_modes[pio];
 382                         csb5_pio     |= (pio << (4*drive->dn));
 383                         dma_timing   |= dma_modes[2];
 384                         ultra_timing |= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit));
 385                         ultra_enable |= (0x01 << drive->dn);
 386                 default:
 387                         break;
 388         }
 389
 390         pci_write_config_byte(dev, drive_pci[drive->dn], pio_timing);
 391         if (csb5)
 392                 pci_write_config_word(dev, 0x4A, csb5_pio);
 393
 394         pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
 395         pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
 396         pci_write_config_byte(dev, 0x54, ultra_enable);
 397
 398         return (ide_config_drive_speed(drive, speed));
 399 }
 400
 401 static void config_chipset_for_pio (ide_drive_t *drive)
 402 {
 403         u16 eide_pio_timing[6] = {960, 480, 240, 180, 120, 90};
 404         u16 xfer_pio = drive->id->eide_pio_modes;
 405         u8 timing, speed, pio;
 406
 407         pio = ide_get_best_pio_mode(drive, 255, 5, NULL);
 408
 409         if (xfer_pio > 4)
 410                 xfer_pio = 0;
 411
 412         if (drive->id->eide_pio_iordy > 0)
 413                 for (xfer_pio = 5;
 414                         xfer_pio>0 &&
 415                         drive->id->eide_pio_iordy>eide_pio_timing[xfer_pio];
 416                         xfer_pio--);
 417         else
 418                 xfer_pio = (drive->id->eide_pio_modes & 4) ? 0x05 :
 419                            (drive->id->eide_pio_modes & 2) ? 0x04 :
 420                            (drive->id->eide_pio_modes & 1) ? 0x03 :
 421                            (drive->id->tPIO & 2) ? 0x02 :
 422                            (drive->id->tPIO & 1) ? 0x01 : xfer_pio;
 423
 424         timing = (xfer_pio >= pio) ? xfer_pio : pio;
 425
 426         switch(timing) {
 427                 case 4: speed = XFER_PIO_4;break;
 428                 case 3: speed = XFER_PIO_3;break;
 429                 case 2: speed = XFER_PIO_2;break;
 430                 case 1: speed = XFER_PIO_1;break;
 431                 default:
 432                         speed = (!drive->id->tPIO) ? XFER_PIO_0 : XFER_PIO_SLOW;
 433                         break;
 434         }
 435         (void) svwks_tune_chipset(drive, speed);
 436         drive->current_speed = speed;
 437 }
 438
 439 static void svwks_tune_drive (ide_drive_t *drive, u8 pio)
 440 {
 441         if(pio == 255)
 442                 (void) svwks_tune_chipset(drive, 255);
 443         else
 444                 (void) svwks_tune_chipset(drive, (XFER_PIO_0 + pio));
 445 }
 446
 447 static int config_chipset_for_dma (ide_drive_t *drive)
 448 {
 449         u8 speed = ide_dma_speed(drive, svwks_ratemask(drive));
 450
 451         if (!(speed))
 452                 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);
 453
 454         (void) svwks_tune_chipset(drive, speed);
 455         return ide_dma_enable(drive);
 456 }
 457
 458 static int svwks_config_drive_xfer_rate (ide_drive_t *drive)
 459 {
 460         ide_hwif_t *hwif        = HWIF(drive);
 461         struct hd_driveid *id   = drive->id;
 462
 463         drive->init_speed = 0;
 464
 465         if ((id->capability & 1) && drive->autodma) {
 466                 /* Consult the list of known "bad" drives */
 467                 if (__ide_dma_bad_drive(drive))
 468                         goto fast_ata_pio;
 469                 if (id->field_valid & 4) {
 470                         if (id->dma_ultra & hwif->ultra_mask) {
 471                                 /* Force if Capable UltraDMA */
 472                                 int dma = config_chipset_for_dma(drive);
 473                                 if ((id->field_valid & 2) && !dma)
 474                                         goto try_dma_modes;
 475                         } else
 476                                 /* UDMA disabled by mask, try other DMA modes */
 477                                 goto try_dma_modes;
 478                 } else if (id->field_valid & 2) {
 479 try_dma_modes:
 480                         if ((id->dma_mword & hwif->mwdma_mask) ||
 481                             (id->dma_1word & hwif->swdma_mask)) {
 482                                 /* Force if Capable regular DMA modes */
 483                                 if (!config_chipset_for_dma(drive))
 484                                         goto no_dma_set;
 485                         }
 486                 } else if (__ide_dma_good_drive(drive) &&
 487                            (id->eide_dma_time < 150)) {
 488                         /* Consult the list of known "good" drives */
 489                         if (!config_chipset_for_dma(drive))
 490                                 goto no_dma_set;
 491                 } else {
 492                         goto no_dma_set;
 493                 }
 494                 return hwif->ide_dma_on(drive);
 495         } else if ((id->capability & 8) || (id->field_valid & 2)) {
 496 fast_ata_pio:
 497 no_dma_set:
 498                 config_chipset_for_pio(drive);
 499                 //      hwif->tuneproc(drive, 5);
 500                 return hwif->ide_dma_off_quietly(drive);
 501         }
 502         /* IORDY not supported */
 503         return 0;
 504 }
 505
 506 /* This can go soon */
 507
 508 static int svwks_ide_dma_end (ide_drive_t *drive)
 509 {
 510         return __ide_dma_end(drive);
 511 }
 512
 513 static unsigned int __init init_chipset_svwks (struct pci_dev *dev, const char *name)
 514 {
 515         unsigned int reg;
 516         u8 btr;
 517
 518         /* save revision id to determine DMA capability */
 519         pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);
 520
 521         /* force Master Latency Timer value to 64 PCICLKs */
 522         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
 523
 524         /* OSB4 : South Bridge and IDE */
 525         if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
 526                 isa_dev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 527                           PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
 528                 if (isa_dev) {
 529                         pci_read_config_dword(isa_dev, 0x64, &reg);
 530                         reg &= ~0x00002000; /* disable 600ns interrupt mask */
 531                         if(!(reg & 0x00004000))
 532                                 printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
 533                         reg |=  0x00004000; /* enable UDMA/33 support */
 534                         pci_write_config_dword(isa_dev, 0x64, reg);
 535                 }
 536         }
 537
 538         /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
 539         else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
 540                  (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 541                  (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
 542 //              u32 pioreg = 0, dmareg = 0;
 543
 544                 /* Third Channel Test */
 545                 if (!(PCI_FUNC(dev->devfn) & 1)) {
 546 #if 1
 547                         struct pci_dev * findev = NULL;
 548                         u32 reg4c = 0;
 549                         findev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 550                                 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
 551                         if (findev) {
 552                                 pci_read_config_dword(findev, 0x4C, &reg4c);
 553                                 reg4c &= ~0x000007FF;
 554                                 reg4c |=  0x00000040;
 555                                 reg4c |=  0x00000020;
 556                                 pci_write_config_dword(findev, 0x4C, reg4c);
 557                         }
 558 #endif
 559                         outb_p(0x06, 0x0c00);
 560                         dev->irq = inb_p(0x0c01);
 561 #if 0
 562                         /* WE need to figure out how to get the correct one */
 563                         printk("%s: interrupt %d\n", name, dev->irq);
 564                         if (dev->irq != 0x0B)
 565                                 dev->irq = 0x0B;
 566 #endif
 567 #if 0
 568                         printk("%s: device class (0x%04x)\n",
 569                                 name, dev->class);
 570 #else
 571                         if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
 572                                 dev->class &= ~0x000F0F00;
 573                 //              dev->class |= ~0x00000400;
 574                                 dev->class |= ~0x00010100;
 575                                 /**/
 576                         }
 577 #endif
 578                 } else {
 579                         struct pci_dev * findev = NULL;
 580                         u8 reg41 = 0;
 581
 582                         findev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 583                                         PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
 584                         if (findev) {
 585                                 pci_read_config_byte(findev, 0x41, &reg41);
 586                                 reg41 &= ~0x40;
 587                                 pci_write_config_byte(findev, 0x41, reg41);
 588                         }
 589                         /*
 590                          * This is a device pin issue on CSB6.
 591                          * Since there will be a future raid mode,
 592                          * early versions of the chipset require the
 593                          * interrupt pin to be set, and it is a compatibility
 594                          * mode issue.
 595                          */
 596                         dev->irq = 0;
 597                 }
 598 //              pci_read_config_dword(dev, 0x40, &pioreg)
 599 //              pci_write_config_dword(dev, 0x40, 0x99999999);
 600 //              pci_read_config_dword(dev, 0x44, &dmareg);
 601 //              pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
 602                 /* setup the UDMA Control register
 603                  *
 604                  * 1. clear bit 6 to enable DMA
 605                  * 2. enable DMA modes with bits 0-1
 606                  *      00 : legacy
 607                  *      01 : udma2
 608                  *      10 : udma2/udma4
 609                  *      11 : udma2/udma4/udma5
 610                  */
 611                 pci_read_config_byte(dev, 0x5A, &btr);
 612                 btr &= ~0x40;
 613                 if (!(PCI_FUNC(dev->devfn) & 1))
 614                         btr |= 0x2;
 615                 else
 616                         btr |= (svwks_revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
 617                 pci_write_config_byte(dev, 0x5A, btr);
 618         }
 619
 620
 621 #if defined(DISPLAY_SVWKS_TIMINGS) && defined(CONFIG_PROC_FS)
 622         svwks_devs[n_svwks_devs++] = dev;
 623
 624         if (!svwks_proc) {
 625                 svwks_proc = 1;
 626                 ide_pci_create_host_proc("svwks", svwks_get_info);
 627         }
 628 #endif /* DISPLAY_SVWKS_TIMINGS && CONFIG_PROC_FS */
 629
 630         return (dev->irq) ? dev->irq : 0;
 631 }
 632
 633 static unsigned int __init ata66_svwks_svwks (ide_hwif_t *hwif)
 634 {
 635         return 1;
 636 }
 637
 638 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
 639  * of the subsystem device ID indicate presence of an 80-pin cable.
 640  * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
 641  * Bit 15 set   = secondary IDE channel has 80-pin cable.
 642  * Bit 14 clear = primary IDE channel does not have 80-pin cable.
 643  * Bit 14 set   = primary IDE channel has 80-pin cable.
 644  */
 645 static unsigned int __init ata66_svwks_dell (ide_hwif_t *hwif)
 646 {
 647         struct pci_dev *dev = hwif->pci_dev;
 648         if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
 649             dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
 650             (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
 651              dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
 652                 return ((1 << (hwif->channel + 14)) &
 653                         dev->subsystem_device) ? 1 : 0;
 654         return 0;
 655 }
 656
 657 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
 658  * detect issue by attaching the drives directly to the board.
 659  * This check follows the Dell precedent (how scary is that?!)
 660  *
 661  * WARNING: this only works on Alpine hardware!
 662  */
 663 static unsigned int __init ata66_svwks_cobalt (ide_hwif_t *hwif)
 664 {
 665         struct pci_dev *dev = hwif->pci_dev;
 666         if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
 667             dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
 668             dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
 669                 return ((1 << (hwif->channel + 14)) &
 670                         dev->subsystem_device) ? 1 : 0;
 671         return 0;
 672 }
 673
 674 static unsigned int __init ata66_svwks (ide_hwif_t *hwif)
 675 {
 676         struct pci_dev *dev = hwif->pci_dev;
 677
 678         /* Per Specified Design by OEM, and ASIC Architect */
 679         if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 680             (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
 681                 return 1;
 682
 683         /* Server Works */
 684         if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
 685                 return ata66_svwks_svwks (hwif);
 686
 687         /* Dell PowerEdge */
 688         if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
 689                 return ata66_svwks_dell (hwif);
 690
 691         /* Cobalt Alpine */
 692         if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
 693                 return ata66_svwks_cobalt (hwif);
 694
 695         return 0;
 696 }
 697
 698 #undef CAN_SW_DMA
 699 static void __init init_hwif_svwks (ide_hwif_t *hwif)
 700 {
 701         u8 dma_stat = 0;
 702
 703         if (!hwif->irq)
 704                 hwif->irq = hwif->channel ? 15 : 14;
 705
 706         hwif->tuneproc = &svwks_tune_drive;
 707         hwif->speedproc = &svwks_tune_chipset;
 708
 709         hwif->atapi_dma = 1;
 710
 711         if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
 712                 hwif->ultra_mask = 0x3f;
 713
 714         hwif->mwdma_mask = 0x07;
 715 #ifdef CAN_SW_DMA
 716         hwif->swdma_mask = 0x07;
 717 #endif /* CAN_SW_DMA */
 718
 719         hwif->autodma = 0;
 720
 721         if (!hwif->dma_base) {
 722                 hwif->drives[0].autotune = 1;
 723                 hwif->drives[1].autotune = 1;
 724                 return;
 725         }
 726
 727         hwif->ide_dma_check = &svwks_config_drive_xfer_rate;
 728         if (hwif->pci_dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
 729                 hwif->ide_dma_end = &svwks_ide_dma_end;
 730         else if (!(hwif->udma_four))
 731                 hwif->udma_four = ata66_svwks(hwif);
 732         if (!noautodma)
 733                 hwif->autodma = 1;
 734
 735         dma_stat = hwif->INB(hwif->dma_status);
 736         hwif->drives[0].autodma = (dma_stat & 0x20);
 737         hwif->drives[1].autodma = (dma_stat & 0x40);
 738         hwif->drives[0].autotune = (!(dma_stat & 0x20));
 739         hwif->drives[1].autotune = (!(dma_stat & 0x40));
 740 //      hwif->drives[0].autodma = hwif->autodma;
 741 //      hwif->drives[1].autodma = hwif->autodma;
 742 }
 743
 744 /*
 745  * We allow the BM-DMA driver to only work on enabled interfaces.
 746  */
 747 static void __init init_dma_svwks (ide_hwif_t *hwif, unsigned long dmabase)
 748 {
 749         struct pci_dev *dev = hwif->pci_dev;
 750
 751         if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 752              (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
 753             (!(PCI_FUNC(dev->devfn) & 1)) && (hwif->channel))
 754                 return;
 755
 756         ide_setup_dma(hwif, dmabase, 8);
 757 }
 758
 759 static void __init init_setup_svwks (struct pci_dev *dev, ide_pci_device_t *d)
 760 {
 761         ide_setup_pci_device(dev, d);
 762 }
 763
 764 static void __init init_setup_csb6 (struct pci_dev *dev, ide_pci_device_t *d)
 765 {
 766         if (!(PCI_FUNC(dev->devfn) & 1)) {
 767                 d->bootable = NEVER_BOARD;
 768                 if (dev->resource[0].start == 0x01f1)
 769                         d->bootable = ON_BOARD;
 770         } else {
 771                 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
 772                         return;
 773         }
 774 #if 0
 775         if ((IDE_PCI_DEVID_EQ(d->devid, DEVID_CSB6) &&
 776              (!(PCI_FUNC(dev->devfn) & 1)))
 777                 d->autodma = AUTODMA;
 778 #endif
 779
 780         d->channels = ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE ||
 781                         dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2) &&
 782                        (!(PCI_FUNC(dev->devfn) & 1))) ? 1 : 2;
 783
 784         ide_setup_pci_device(dev, d);
 785 }
 786
 787
 788 /**
 789  *      svwks_init_one  -       called when a OSB/CSB is found
 790  *      @dev: the svwks device
 791  *      @id: the matching pci id
 792  *
 793  *      Called when the PCI registration layer (or the IDE initialization)
 794  *      finds a device matching our IDE device tables.
 795  */
 796
 797 static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 798 {
 799         ide_pci_device_t *d = &serverworks_chipsets[id->driver_data];
 800
 801         d->init_setup(dev, d);
 802         return 0;
 803 }
 804
 805 static struct pci_device_id svwks_pci_tbl[] = {
 806         { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 807         { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
 808         { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
 809         { PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
 810         { 0, },
 811 };
 812 MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
 813
 814 static struct pci_driver driver = {
 815         .name           = "Serverworks IDE",
 816         .id_table       = svwks_pci_tbl,
 817         .probe          = svwks_init_one,
 818 #if 0   /* FIXME: implement */
 819         .suspend        = ,
 820         .resume         = ,
 821 #endif
 822 };
 823
 824 static int svwks_ide_init(void)
 825 {
 826         return ide_pci_register_driver(&driver);
 827 }
 828
 829 module_init(svwks_ide_init);
 830
 831 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
 832 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
 833 MODULE_LICENSE("GPL");