drivers/ide/alim15x3.c

   1 /*
   2  *  Copyright (C) 1998-2000 Michel Aubry, Maintainer
   3  *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
   4  *  Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
   5  *
   6  *  Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
   7  *  May be copied or modified under the terms of the GNU General Public License
   8  *  Copyright (C) 2002 Alan Cox
   9  *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
  10  *  Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
  11  *  Copyright (C) 2007 Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
  12  *
  13  *  (U)DMA capable version of ali 1533/1543(C), 1535(D)
  14  *
  15  **********************************************************************
  16  *  9/7/99 --Parts from the above author are included and need to be
  17  *  converted into standard interface, once I finish the thought.
  18  *
  19  *  Recent changes
  20  *      Don't use LBA48 mode on ALi <= 0xC4
  21  *      Don't poke 0x79 with a non ALi northbridge
  22  *      Don't flip undefined bits on newer chipsets (fix Fujitsu laptop hang)
  23  *      Allow UDMA6 on revisions > 0xC4
  24  *
  25  *  Documentation
  26  *      Chipset documentation available under NDA only
  27  *
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/types.h>
  32 #include <linux/kernel.h>
  33 #include <linux/pci.h>
  34 #include <linux/ide.h>
  35 #include <linux/init.h>
  36 #include <linux/dmi.h>
  37
  38 #include <asm/io.h>
  39
  40 #define DRV_NAME "alim15x3"
  41
  42 /*
  43  * Allow UDMA on M1543C-E chipset for WDC disks that ignore CRC checking
  44  * (this is DANGEROUS and could result in data corruption).
  45  */
  46 static int wdc_udma;
  47
  48 module_param(wdc_udma, bool, 0);
  49 MODULE_PARM_DESC(wdc_udma,
  50                  "allow UDMA on M1543C-E chipset for WDC disks (DANGEROUS)");
  51
  52 /*
  53  *      ALi devices are not plug in. Otherwise these static values would
  54  *      need to go. They ought to go away anyway
  55  */
  56
  57 static u8 m5229_revision;
  58 static u8 chip_is_1543c_e;
  59 static struct pci_dev *isa_dev;
  60
  61 /**
  62  *      ali_set_pio_mode        -       set host controller for PIO mode
  63  *      @drive: drive
  64  *      @pio: PIO mode number
  65  *
  66  *      Program the controller for the given PIO mode.
  67  */
  68
  69 static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio)
  70 {
  71         ide_hwif_t *hwif = drive->hwif;
  72         struct pci_dev *dev = to_pci_dev(hwif->dev);
  73         struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
  74         int s_time = t->setup, a_time = t->active, c_time = t->cycle;
  75         u8 s_clc, a_clc, r_clc;
  76         unsigned long flags;
  77         int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
  78         int port = hwif->channel ? 0x5c : 0x58;
  79         int portFIFO = hwif->channel ? 0x55 : 0x54;
  80         u8 cd_dma_fifo = 0, unit = drive->dn & 1;
  81
  82         if ((s_clc = (s_time * bus_speed + 999) / 1000) >= 8)
  83                 s_clc = 0;
  84         if ((a_clc = (a_time * bus_speed + 999) / 1000) >= 8)
  85                 a_clc = 0;
  86
  87         if (!(r_clc = (c_time * bus_speed + 999) / 1000 - a_clc - s_clc)) {
  88                 r_clc = 1;
  89         } else {
  90                 if (r_clc >= 16)
  91                         r_clc = 0;
  92         }
  93         local_irq_save(flags);
  94
  95         /*
  96          * PIO mode => ATA FIFO on, ATAPI FIFO off
  97          */
  98         pci_read_config_byte(dev, portFIFO, &cd_dma_fifo);
  99         if (drive->media==ide_disk) {
 100                 if (unit) {
 101                         pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0x0F) | 0x50);
 102                 } else {
 103                         pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0xF0) | 0x05);
 104                 }
 105         } else {
 106                 if (unit) {
 107                         pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0x0F);
 108                 } else {
 109                         pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0xF0);
 110                 }
 111         }
 112
 113         pci_write_config_byte(dev, port, s_clc);
 114         pci_write_config_byte(dev, port + unit + 2, (a_clc << 4) | r_clc);
 115         local_irq_restore(flags);
 116 }
 117
 118 /**
 119  *      ali_udma_filter         -       compute UDMA mask
 120  *      @drive: IDE device
 121  *
 122  *      Return available UDMA modes.
 123  *
 124  *      The actual rules for the ALi are:
 125  *              No UDMA on revisions <= 0x20
 126  *              Disk only for revisions < 0xC2
 127  *              Not WDC drives on M1543C-E (?)
 128  */
 129
 130 static u8 ali_udma_filter(ide_drive_t *drive)
 131 {
 132         if (m5229_revision > 0x20 && m5229_revision < 0xC2) {
 133                 if (drive->media != ide_disk)
 134                         return 0;
 135                 if (wdc_udma == 0 && chip_is_1543c_e &&
 136                     strstr((char *)&drive->id[ATA_ID_PROD], "WDC "))
 137                         return 0;
 138         }
 139
 140         return drive->hwif->ultra_mask;
 141 }
 142
 143 /**
 144  *      ali_set_dma_mode        -       set host controller for DMA mode
 145  *      @drive: drive
 146  *      @speed: DMA mode
 147  *
 148  *      Configure the hardware for the desired IDE transfer mode.
 149  */
 150
 151 static void ali_set_dma_mode(ide_drive_t *drive, const u8 speed)
 152 {
 153         ide_hwif_t *hwif        = drive->hwif;
 154         struct pci_dev *dev     = to_pci_dev(hwif->dev);
 155         u8 speed1               = speed;
 156         u8 unit                 = drive->dn & 1;
 157         u8 tmpbyte              = 0x00;
 158         int m5229_udma          = (hwif->channel) ? 0x57 : 0x56;
 159
 160         if (speed == XFER_UDMA_6)
 161                 speed1 = 0x47;
 162
 163         if (speed < XFER_UDMA_0) {
 164                 u8 ultra_enable = (unit) ? 0x7f : 0xf7;
 165                 /*
 166                  * clear "ultra enable" bit
 167                  */
 168                 pci_read_config_byte(dev, m5229_udma, &tmpbyte);
 169                 tmpbyte &= ultra_enable;
 170                 pci_write_config_byte(dev, m5229_udma, tmpbyte);
 171
 172                 /*
 173                  * FIXME: Oh, my... DMA timings are never set.
 174                  */
 175         } else {
 176                 pci_read_config_byte(dev, m5229_udma, &tmpbyte);
 177                 tmpbyte &= (0x0f << ((1-unit) << 2));
 178                 /*
 179                  * enable ultra dma and set timing
 180                  */
 181                 tmpbyte |= ((0x08 | ((4-speed1)&0x07)) << (unit << 2));
 182                 pci_write_config_byte(dev, m5229_udma, tmpbyte);
 183                 if (speed >= XFER_UDMA_3) {
 184                         pci_read_config_byte(dev, 0x4b, &tmpbyte);
 185                         tmpbyte |= 1;
 186                         pci_write_config_byte(dev, 0x4b, tmpbyte);
 187                 }
 188         }
 189 }
 190
 191 /**
 192  *      ali_dma_check   -       DMA check
 193  *      @drive: target device
 194  *      @cmd: command
 195  *
 196  *      Returns 1 if the DMA cannot be performed, zero on success.
 197  */
 198
 199 static int ali_dma_check(ide_drive_t *drive, struct ide_cmd *cmd)
 200 {
 201         if (m5229_revision < 0xC2 && drive->media != ide_disk) {
 202                 if (cmd->tf_flags & IDE_TFLAG_WRITE)
 203                         return 1;       /* try PIO instead of DMA */
 204         }
 205         return 0;
 206 }
 207
 208 /**
 209  *      init_chipset_ali15x3    -       Initialise an ALi IDE controller
 210  *      @dev: PCI device
 211  *
 212  *      This function initializes the ALI IDE controller and where
 213  *      appropriate also sets up the 1533 southbridge.
 214  */
 215
 216 static int init_chipset_ali15x3(struct pci_dev *dev)
 217 {
 218         unsigned long flags;
 219         u8 tmpbyte;
 220         struct pci_dev *north = pci_get_slot(dev->bus, PCI_DEVFN(0,0));
 221
 222         m5229_revision = dev->revision;
 223
 224         isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 225
 226         local_irq_save(flags);
 227
 228         if (m5229_revision < 0xC2) {
 229                 /*
 230                  * revision 0x20 (1543-E, 1543-F)
 231                  * revision 0xC0, 0xC1 (1543C-C, 1543C-D, 1543C-E)
 232                  * clear CD-ROM DMA write bit, m5229, 0x4b, bit 7
 233                  */
 234                 pci_read_config_byte(dev, 0x4b, &tmpbyte);
 235                 /*
 236                  * clear bit 7
 237                  */
 238                 pci_write_config_byte(dev, 0x4b, tmpbyte & 0x7F);
 239                 /*
 240                  * check m1533, 0x5e, bit 1~4 == 1001 => & 00011110 = 00010010
 241                  */
 242                 if (m5229_revision >= 0x20 && isa_dev) {
 243                         pci_read_config_byte(isa_dev, 0x5e, &tmpbyte);
 244                         chip_is_1543c_e = ((tmpbyte & 0x1e) == 0x12) ? 1: 0;
 245                 }
 246                 goto out;
 247         }
 248
 249         /*
 250          * 1543C-B?, 1535, 1535D, 1553
 251          * Note 1: not all "motherboard" support this detection
 252          * Note 2: if no udma 66 device, the detection may "error".
 253          *         but in this case, we will not set the device to
 254          *         ultra 66, the detection result is not important
 255          */
 256
 257         /*
 258          * enable "Cable Detection", m5229, 0x4b, bit3
 259          */
 260         pci_read_config_byte(dev, 0x4b, &tmpbyte);
 261         pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);
 262
 263         /*
 264          * We should only tune the 1533 enable if we are using an ALi
 265          * North bridge. We might have no north found on some zany
 266          * box without a device at 0:0.0. The ALi bridge will be at
 267          * 0:0.0 so if we didn't find one we know what is cooking.
 268          */
 269         if (north && north->vendor != PCI_VENDOR_ID_AL)
 270                 goto out;
 271
 272         if (m5229_revision < 0xC5 && isa_dev)
 273         {
 274                 /*
 275                  * set south-bridge's enable bit, m1533, 0x79
 276                  */
 277
 278                 pci_read_config_byte(isa_dev, 0x79, &tmpbyte);
 279                 if (m5229_revision == 0xC2) {
 280                         /*
 281                          * 1543C-B0 (m1533, 0x79, bit 2)
 282                          */
 283                         pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x04);
 284                 } else if (m5229_revision >= 0xC3) {
 285                         /*
 286                          * 1553/1535 (m1533, 0x79, bit 1)
 287                          */
 288                         pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
 289                 }
 290         }
 291
 292 out:
 293         /*
 294          * CD_ROM DMA on (m5229, 0x53, bit0)
 295          *      Enable this bit even if we want to use PIO.
 296          * PIO FIFO off (m5229, 0x53, bit1)
 297          *      The hardware will use 0x54h and 0x55h to control PIO FIFO.
 298          *      (Not on later devices it seems)
 299          *
 300          *      0x53 changes meaning on later revs - we must no touch
 301          *      bit 1 on them.  Need to check if 0x20 is the right break.
 302          */
 303         if (m5229_revision >= 0x20) {
 304                 pci_read_config_byte(dev, 0x53, &tmpbyte);
 305
 306                 if (m5229_revision <= 0x20)
 307                         tmpbyte = (tmpbyte & (~0x02)) | 0x01;
 308                 else if (m5229_revision == 0xc7 || m5229_revision == 0xc8)
 309                         tmpbyte |= 0x03;
 310                 else
 311                         tmpbyte |= 0x01;
 312
 313                 pci_write_config_byte(dev, 0x53, tmpbyte);
 314         }
 315         pci_dev_put(north);
 316         pci_dev_put(isa_dev);
 317         local_irq_restore(flags);
 318         return 0;
 319 }
 320
 321 /*
 322  *      Cable special cases
 323  */
 324
 325 static const struct dmi_system_id cable_dmi_table[] = {
 326         {
 327                 .ident = "HP Pavilion N5430",
 328                 .matches = {
 329                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 330                         DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
 331                 },
 332         },
 333         {
 334                 .ident = "Toshiba Satellite S1800-814",
 335                 .matches = {
 336                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 337                         DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
 338                 },
 339         },
 340         { }
 341 };
 342
 343 static int ali_cable_override(struct pci_dev *pdev)
 344 {
 345         /* Fujitsu P2000 */
 346         if (pdev->subsystem_vendor == 0x10CF &&
 347             pdev->subsystem_device == 0x10AF)
 348                 return 1;
 349
 350         /* Mitac 8317 (Winbook-A) and relatives */
 351         if (pdev->subsystem_vendor == 0x1071 &&
 352             pdev->subsystem_device == 0x8317)
 353                 return 1;
 354
 355         /* Systems by DMI */
 356         if (dmi_check_system(cable_dmi_table))
 357                 return 1;
 358
 359         return 0;
 360 }
 361
 362 /**
 363  *      ali_cable_detect        -       cable detection
 364  *      @hwif: IDE interface
 365  *
 366  *      This checks if the controller and the cable are capable
 367  *      of UDMA66 transfers. It doesn't check the drives.
 368  *      But see note 2 below!
 369  *
 370  *      FIXME: frobs bits that are not defined on newer ALi devicea
 371  */
 372
 373 static u8 ali_cable_detect(ide_hwif_t *hwif)
 374 {
 375         struct pci_dev *dev = to_pci_dev(hwif->dev);
 376         unsigned long flags;
 377         u8 cbl = ATA_CBL_PATA40, tmpbyte;
 378
 379         local_irq_save(flags);
 380
 381         if (m5229_revision >= 0xC2) {
 382                 /*
 383                  * m5229 80-pin cable detection (from Host View)
 384                  *
 385                  * 0x4a bit0 is 0 => primary channel has 80-pin
 386                  * 0x4a bit1 is 0 => secondary channel has 80-pin
 387                  *
 388                  * Certain laptops use short but suitable cables
 389                  * and don't implement the detect logic.
 390                  */
 391                 if (ali_cable_override(dev))
 392                         cbl = ATA_CBL_PATA40_SHORT;
 393                 else {
 394                         pci_read_config_byte(dev, 0x4a, &tmpbyte);
 395                         if ((tmpbyte & (1 << hwif->channel)) == 0)
 396                                 cbl = ATA_CBL_PATA80;
 397                 }
 398         }
 399
 400         local_irq_restore(flags);
 401
 402         return cbl;
 403 }
 404
 405 #if !defined(CONFIG_SPARC64) && !defined(CONFIG_PPC)
 406 /**
 407  *      init_hwif_ali15x3       -       Initialize the ALI IDE x86 stuff
 408  *      @hwif: interface to configure
 409  *
 410  *      Obtain the IRQ tables for an ALi based IDE solution on the PC
 411  *      class platforms. This part of the code isn't applicable to the
 412  *      Sparc and PowerPC systems.
 413  */
 414
 415 static void __devinit init_hwif_ali15x3 (ide_hwif_t *hwif)
 416 {
 417         struct pci_dev *dev = to_pci_dev(hwif->dev);
 418         u8 ideic, inmir;
 419         s8 irq_routing_table[] = { -1,  9, 3, 10, 4,  5, 7,  6,
 420                                       1, 11, 0, 12, 0, 14, 0, 15 };
 421         int irq = -1;
 422
 423         if (dev->device == PCI_DEVICE_ID_AL_M5229)
 424                 hwif->irq = hwif->channel ? 15 : 14;
 425
 426         if (isa_dev) {
 427                 /*
 428                  * read IDE interface control
 429                  */
 430                 pci_read_config_byte(isa_dev, 0x58, &ideic);
 431
 432                 /* bit0, bit1 */
 433                 ideic = ideic & 0x03;
 434
 435                 /* get IRQ for IDE Controller */
 436                 if ((hwif->channel && ideic == 0x03) ||
 437                     (!hwif->channel && !ideic)) {
 438                         /*
 439                          * get SIRQ1 routing table
 440                          */
 441                         pci_read_config_byte(isa_dev, 0x44, &inmir);
 442                         inmir = inmir & 0x0f;
 443                         irq = irq_routing_table[inmir];
 444                 } else if (hwif->channel && !(ideic & 0x01)) {
 445                         /*
 446                          * get SIRQ2 routing table
 447                          */
 448                         pci_read_config_byte(isa_dev, 0x75, &inmir);
 449                         inmir = inmir & 0x0f;
 450                         irq = irq_routing_table[inmir];
 451                 }
 452                 if(irq >= 0)
 453                         hwif->irq = irq;
 454         }
 455 }
 456 #else
 457 #define init_hwif_ali15x3 NULL
 458 #endif /* !defined(CONFIG_SPARC64) && !defined(CONFIG_PPC) */
 459
 460 /**
 461  *      init_dma_ali15x3        -       set up DMA on ALi15x3
 462  *      @hwif: IDE interface
 463  *      @d: IDE port info
 464  *
 465  *      Set up the DMA functionality on the ALi 15x3.
 466  */
 467
 468 static int __devinit init_dma_ali15x3(ide_hwif_t *hwif,
 469                                       const struct ide_port_info *d)
 470 {
 471         struct pci_dev *dev = to_pci_dev(hwif->dev);
 472         unsigned long base = ide_pci_dma_base(hwif, d);
 473
 474         if (base == 0)
 475                 return -1;
 476
 477         hwif->dma_base = base;
 478
 479         if (ide_pci_check_simplex(hwif, d) < 0)
 480                 return -1;
 481
 482         if (ide_pci_set_master(dev, d->name) < 0)
 483                 return -1;
 484
 485         if (!hwif->channel)
 486                 outb(inb(base + 2) & 0x60, base + 2);
 487
 488         printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
 489                          hwif->name, base, base + 7);
 490
 491         if (ide_allocate_dma_engine(hwif))
 492                 return -1;
 493
 494         return 0;
 495 }
 496
 497 static const struct ide_port_ops ali_port_ops = {
 498         .set_pio_mode           = ali_set_pio_mode,
 499         .set_dma_mode           = ali_set_dma_mode,
 500         .udma_filter            = ali_udma_filter,
 501         .cable_detect           = ali_cable_detect,
 502 };
 503
 504 static const struct ide_dma_ops ali_dma_ops = {
 505         .dma_host_set           = ide_dma_host_set,
 506         .dma_setup              = ide_dma_setup,
 507         .dma_start              = ide_dma_start,
 508         .dma_end                = ide_dma_end,
 509         .dma_test_irq           = ide_dma_test_irq,
 510         .dma_lost_irq           = ide_dma_lost_irq,
 511         .dma_check              = ali_dma_check,
 512         .dma_timer_expiry       = ide_dma_sff_timer_expiry,
 513         .dma_sff_read_status    = ide_dma_sff_read_status,
 514 };
 515
 516 static const struct ide_port_info ali15x3_chipset __devinitdata = {
 517         .name           = DRV_NAME,
 518         .init_chipset   = init_chipset_ali15x3,
 519         .init_hwif      = init_hwif_ali15x3,
 520         .init_dma       = init_dma_ali15x3,
 521         .port_ops       = &ali_port_ops,
 522         .dma_ops        = &sff_dma_ops,
 523         .pio_mask       = ATA_PIO5,
 524         .swdma_mask     = ATA_SWDMA2,
 525         .mwdma_mask     = ATA_MWDMA2,
 526 };
 527
 528 /**
 529  *      alim15x3_init_one       -       set up an ALi15x3 IDE controller
 530  *      @dev: PCI device to set up
 531  *
 532  *      Perform the actual set up for an ALi15x3 that has been found by the
 533  *      hot plug layer.
 534  */
 535
 536 static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 537 {
 538         struct ide_port_info d = ali15x3_chipset;
 539         u8 rev = dev->revision, idx = id->driver_data;
 540
 541         /* don't use LBA48 DMA on ALi devices before rev 0xC5 */
 542         if (rev <= 0xC4)
 543                 d.host_flags |= IDE_HFLAG_NO_LBA48_DMA;
 544
 545         if (rev >= 0x20) {
 546                 if (rev == 0x20)
 547                         d.host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 548
 549                 if (rev < 0xC2)
 550                         d.udma_mask = ATA_UDMA2;
 551                 else if (rev == 0xC2 || rev == 0xC3)
 552                         d.udma_mask = ATA_UDMA4;
 553                 else if (rev == 0xC4)
 554                         d.udma_mask = ATA_UDMA5;
 555                 else
 556                         d.udma_mask = ATA_UDMA6;
 557
 558                 d.dma_ops = &ali_dma_ops;
 559         } else {
 560                 d.host_flags |= IDE_HFLAG_NO_DMA;
 561
 562                 d.mwdma_mask = d.swdma_mask = 0;
 563         }
 564
 565         if (idx == 0)
 566                 d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
 567
 568         return ide_pci_init_one(dev, &d, NULL);
 569 }
 570
 571
 572 static const struct pci_device_id alim15x3_pci_tbl[] = {
 573         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), 0 },
 574         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), 1 },
 575         { 0, },
 576 };
 577 MODULE_DEVICE_TABLE(pci, alim15x3_pci_tbl);
 578
 579 static struct pci_driver alim15x3_pci_driver = {
 580         .name           = "ALI15x3_IDE",
 581         .id_table       = alim15x3_pci_tbl,
 582         .probe          = alim15x3_init_one,
 583         .remove         = ide_pci_remove,
 584         .suspend        = ide_pci_suspend,
 585         .resume         = ide_pci_resume,
 586 };
 587
 588 static int __init ali15x3_ide_init(void)
 589 {
 590         return ide_pci_register_driver(&alim15x3_pci_driver);
 591 }
 592
 593 static void __exit ali15x3_ide_exit(void)
 594 {
 595         pci_unregister_driver(&alim15x3_pci_driver);
 596 }
 597
 598 module_init(ali15x3_ide_init);
 599 module_exit(ali15x3_ide_exit);
 600
 601 MODULE_AUTHOR("Michael Aubry, Andrzej Krzysztofowicz, CJ, Andre Hedrick, Alan Cox");
 602 MODULE_DESCRIPTION("PCI driver module for ALi 15x3 IDE");
 603 MODULE_LICENSE("GPL");