drivers/ide/pci/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 <alan@redhat.com>
   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/hdreg.h>
  35 #include <linux/ide.h>
  36 #include <linux/init.h>
  37 #include <linux/dmi.h>
  38
  39 #include <asm/io.h>
  40
  41 /*
  42  *      ALi devices are not plug in. Otherwise these static values would
  43  *      need to go. They ought to go away anyway
  44  */
  45
  46 static u8 m5229_revision;
  47 static u8 chip_is_1543c_e;
  48 static struct pci_dev *isa_dev;
  49
  50 /**
  51  *      ali_set_pio_mode        -       set host controller for PIO mode
  52  *      @drive: drive
  53  *      @pio: PIO mode number
  54  *
  55  *      Program the controller for the given PIO mode.
  56  */
  57
  58 static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio)
  59 {
  60         ide_hwif_t *hwif = HWIF(drive);
  61         struct pci_dev *dev = to_pci_dev(hwif->dev);
  62         int s_time, a_time, c_time;
  63         u8 s_clc, a_clc, r_clc;
  64         unsigned long flags;
  65         int bus_speed = ide_pci_clk ? ide_pci_clk : system_bus_clock();
  66         int port = hwif->channel ? 0x5c : 0x58;
  67         int portFIFO = hwif->channel ? 0x55 : 0x54;
  68         u8 cd_dma_fifo = 0;
  69         int unit = drive->select.b.unit & 1;
  70
  71         s_time = ide_pio_timings[pio].setup_time;
  72         a_time = ide_pio_timings[pio].active_time;
  73         if ((s_clc = (s_time * bus_speed + 999) / 1000) >= 8)
  74                 s_clc = 0;
  75         if ((a_clc = (a_time * bus_speed + 999) / 1000) >= 8)
  76                 a_clc = 0;
  77         c_time = ide_pio_timings[pio].cycle_time;
  78
  79 #if 0
  80         if ((r_clc = ((c_time - s_time - a_time) * bus_speed + 999) / 1000) >= 16)
  81                 r_clc = 0;
  82 #endif
  83
  84         if (!(r_clc = (c_time * bus_speed + 999) / 1000 - a_clc - s_clc)) {
  85                 r_clc = 1;
  86         } else {
  87                 if (r_clc >= 16)
  88                         r_clc = 0;
  89         }
  90         local_irq_save(flags);
  91
  92         /*
  93          * PIO mode => ATA FIFO on, ATAPI FIFO off
  94          */
  95         pci_read_config_byte(dev, portFIFO, &cd_dma_fifo);
  96         if (drive->media==ide_disk) {
  97                 if (unit) {
  98                         pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0x0F) | 0x50);
  99                 } else {
 100                         pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0xF0) | 0x05);
 101                 }
 102         } else {
 103                 if (unit) {
 104                         pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0x0F);
 105                 } else {
 106                         pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0xF0);
 107                 }
 108         }
 109
 110         pci_write_config_byte(dev, port, s_clc);
 111         pci_write_config_byte(dev, port+drive->select.b.unit+2, (a_clc << 4) | r_clc);
 112         local_irq_restore(flags);
 113
 114         /*
 115          * setup   active  rec
 116          * { 70,   165,    365 },   PIO Mode 0
 117          * { 50,   125,    208 },   PIO Mode 1
 118          * { 30,   100,    110 },   PIO Mode 2
 119          * { 30,   80,     70  },   PIO Mode 3 with IORDY
 120          * { 25,   70,     25  },   PIO Mode 4 with IORDY  ns
 121          * { 20,   50,     30  }    PIO Mode 5 with IORDY (nonstandard)
 122          */
 123 }
 124
 125 /**
 126  *      ali_udma_filter         -       compute UDMA mask
 127  *      @drive: IDE device
 128  *
 129  *      Return available UDMA modes.
 130  *
 131  *      The actual rules for the ALi are:
 132  *              No UDMA on revisions <= 0x20
 133  *              Disk only for revisions < 0xC2
 134  *              Not WDC drives for revisions < 0xC2
 135  *
 136  *      FIXME: WDC ifdef needs to die
 137  */
 138
 139 static u8 ali_udma_filter(ide_drive_t *drive)
 140 {
 141         if (m5229_revision > 0x20 && m5229_revision < 0xC2) {
 142                 if (drive->media != ide_disk)
 143                         return 0;
 144 #ifndef CONFIG_WDC_ALI15X3
 145                 if (chip_is_1543c_e && strstr(drive->id->model, "WDC "))
 146                         return 0;
 147 #endif
 148         }
 149
 150         return drive->hwif->ultra_mask;
 151 }
 152
 153 /**
 154  *      ali_set_dma_mode        -       set host controller for DMA mode
 155  *      @drive: drive
 156  *      @speed: DMA mode
 157  *
 158  *      Configure the hardware for the desired IDE transfer mode.
 159  */
 160
 161 static void ali_set_dma_mode(ide_drive_t *drive, const u8 speed)
 162 {
 163         ide_hwif_t *hwif        = HWIF(drive);
 164         struct pci_dev *dev     = to_pci_dev(hwif->dev);
 165         u8 speed1               = speed;
 166         u8 unit                 = (drive->select.b.unit & 0x01);
 167         u8 tmpbyte              = 0x00;
 168         int m5229_udma          = (hwif->channel) ? 0x57 : 0x56;
 169
 170         if (speed == XFER_UDMA_6)
 171                 speed1 = 0x47;
 172
 173         if (speed < XFER_UDMA_0) {
 174                 u8 ultra_enable = (unit) ? 0x7f : 0xf7;
 175                 /*
 176                  * clear "ultra enable" bit
 177                  */
 178                 pci_read_config_byte(dev, m5229_udma, &tmpbyte);
 179                 tmpbyte &= ultra_enable;
 180                 pci_write_config_byte(dev, m5229_udma, tmpbyte);
 181
 182                 /*
 183                  * FIXME: Oh, my... DMA timings are never set.
 184                  */
 185         } else {
 186                 pci_read_config_byte(dev, m5229_udma, &tmpbyte);
 187                 tmpbyte &= (0x0f << ((1-unit) << 2));
 188                 /*
 189                  * enable ultra dma and set timing
 190                  */
 191                 tmpbyte |= ((0x08 | ((4-speed1)&0x07)) << (unit << 2));
 192                 pci_write_config_byte(dev, m5229_udma, tmpbyte);
 193                 if (speed >= XFER_UDMA_3) {
 194                         pci_read_config_byte(dev, 0x4b, &tmpbyte);
 195                         tmpbyte |= 1;
 196                         pci_write_config_byte(dev, 0x4b, tmpbyte);
 197                 }
 198         }
 199 }
 200
 201 /**
 202  *      ali15x3_dma_setup       -       begin a DMA phase
 203  *      @drive: target device
 204  *
 205  *      Returns 1 if the DMA cannot be performed, zero on success.
 206  */
 207
 208 static int ali15x3_dma_setup(ide_drive_t *drive)
 209 {
 210         if (m5229_revision < 0xC2 && drive->media != ide_disk) {
 211                 if (rq_data_dir(drive->hwif->hwgroup->rq))
 212                         return 1;       /* try PIO instead of DMA */
 213         }
 214         return ide_dma_setup(drive);
 215 }
 216
 217 /**
 218  *      init_chipset_ali15x3    -       Initialise an ALi IDE controller
 219  *      @dev: PCI device
 220  *      @name: Name of the controller
 221  *
 222  *      This function initializes the ALI IDE controller and where
 223  *      appropriate also sets up the 1533 southbridge.
 224  */
 225
 226 static unsigned int __devinit init_chipset_ali15x3 (struct pci_dev *dev, const char *name)
 227 {
 228         unsigned long flags;
 229         u8 tmpbyte;
 230         struct pci_dev *north = pci_get_slot(dev->bus, PCI_DEVFN(0,0));
 231
 232         m5229_revision = dev->revision;
 233
 234         isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 235
 236         local_irq_save(flags);
 237
 238         if (m5229_revision < 0xC2) {
 239                 /*
 240                  * revision 0x20 (1543-E, 1543-F)
 241                  * revision 0xC0, 0xC1 (1543C-C, 1543C-D, 1543C-E)
 242                  * clear CD-ROM DMA write bit, m5229, 0x4b, bit 7
 243                  */
 244                 pci_read_config_byte(dev, 0x4b, &tmpbyte);
 245                 /*
 246                  * clear bit 7
 247                  */
 248                 pci_write_config_byte(dev, 0x4b, tmpbyte & 0x7F);
 249                 /*
 250                  * check m1533, 0x5e, bit 1~4 == 1001 => & 00011110 = 00010010
 251                  */
 252                 if (m5229_revision >= 0x20 && isa_dev) {
 253                         pci_read_config_byte(isa_dev, 0x5e, &tmpbyte);
 254                         chip_is_1543c_e = ((tmpbyte & 0x1e) == 0x12) ? 1: 0;
 255                 }
 256                 goto out;
 257         }
 258
 259         /*
 260          * 1543C-B?, 1535, 1535D, 1553
 261          * Note 1: not all "motherboard" support this detection
 262          * Note 2: if no udma 66 device, the detection may "error".
 263          *         but in this case, we will not set the device to
 264          *         ultra 66, the detection result is not important
 265          */
 266
 267         /*
 268          * enable "Cable Detection", m5229, 0x4b, bit3
 269          */
 270         pci_read_config_byte(dev, 0x4b, &tmpbyte);
 271         pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);
 272
 273         /*
 274          * We should only tune the 1533 enable if we are using an ALi
 275          * North bridge. We might have no north found on some zany
 276          * box without a device at 0:0.0. The ALi bridge will be at
 277          * 0:0.0 so if we didn't find one we know what is cooking.
 278          */
 279         if (north && north->vendor != PCI_VENDOR_ID_AL)
 280                 goto out;
 281
 282         if (m5229_revision < 0xC5 && isa_dev)
 283         {
 284                 /*
 285                  * set south-bridge's enable bit, m1533, 0x79
 286                  */
 287
 288                 pci_read_config_byte(isa_dev, 0x79, &tmpbyte);
 289                 if (m5229_revision == 0xC2) {
 290                         /*
 291                          * 1543C-B0 (m1533, 0x79, bit 2)
 292                          */
 293                         pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x04);
 294                 } else if (m5229_revision >= 0xC3) {
 295                         /*
 296                          * 1553/1535 (m1533, 0x79, bit 1)
 297                          */
 298                         pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
 299                 }
 300         }
 301
 302 out:
 303         /*
 304          * CD_ROM DMA on (m5229, 0x53, bit0)
 305          *      Enable this bit even if we want to use PIO.
 306          * PIO FIFO off (m5229, 0x53, bit1)
 307          *      The hardware will use 0x54h and 0x55h to control PIO FIFO.
 308          *      (Not on later devices it seems)
 309          *
 310          *      0x53 changes meaning on later revs - we must no touch
 311          *      bit 1 on them.  Need to check if 0x20 is the right break.
 312          */
 313         if (m5229_revision >= 0x20) {
 314                 pci_read_config_byte(dev, 0x53, &tmpbyte);
 315
 316                 if (m5229_revision <= 0x20)
 317                         tmpbyte = (tmpbyte & (~0x02)) | 0x01;
 318                 else if (m5229_revision == 0xc7 || m5229_revision == 0xc8)
 319                         tmpbyte |= 0x03;
 320                 else
 321                         tmpbyte |= 0x01;
 322
 323                 pci_write_config_byte(dev, 0x53, tmpbyte);
 324         }
 325         pci_dev_put(north);
 326         pci_dev_put(isa_dev);
 327         local_irq_restore(flags);
 328         return 0;
 329 }
 330
 331 /*
 332  *      Cable special cases
 333  */
 334
 335 static const struct dmi_system_id cable_dmi_table[] = {
 336         {
 337                 .ident = "HP Pavilion N5430",
 338                 .matches = {
 339                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 340                         DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
 341                 },
 342         },
 343         {
 344                 .ident = "Toshiba Satellite S1800-814",
 345                 .matches = {
 346                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 347                         DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
 348                 },
 349         },
 350         { }
 351 };
 352
 353 static int ali_cable_override(struct pci_dev *pdev)
 354 {
 355         /* Fujitsu P2000 */
 356         if (pdev->subsystem_vendor == 0x10CF &&
 357             pdev->subsystem_device == 0x10AF)
 358                 return 1;
 359
 360         /* Mitac 8317 (Winbook-A) and relatives */
 361         if (pdev->subsystem_vendor == 0x1071 &&
 362             pdev->subsystem_device == 0x8317)
 363                 return 1;
 364
 365         /* Systems by DMI */
 366         if (dmi_check_system(cable_dmi_table))
 367                 return 1;
 368
 369         return 0;
 370 }
 371
 372 /**
 373  *      ali_cable_detect        -       cable detection
 374  *      @hwif: IDE interface
 375  *
 376  *      This checks if the controller and the cable are capable
 377  *      of UDMA66 transfers. It doesn't check the drives.
 378  *      But see note 2 below!
 379  *
 380  *      FIXME: frobs bits that are not defined on newer ALi devicea
 381  */
 382
 383 static u8 __devinit ali_cable_detect(ide_hwif_t *hwif)
 384 {
 385         struct pci_dev *dev = to_pci_dev(hwif->dev);
 386         unsigned long flags;
 387         u8 cbl = ATA_CBL_PATA40, tmpbyte;
 388
 389         local_irq_save(flags);
 390
 391         if (m5229_revision >= 0xC2) {
 392                 /*
 393                  * m5229 80-pin cable detection (from Host View)
 394                  *
 395                  * 0x4a bit0 is 0 => primary channel has 80-pin
 396                  * 0x4a bit1 is 0 => secondary channel has 80-pin
 397                  *
 398                  * Certain laptops use short but suitable cables
 399                  * and don't implement the detect logic.
 400                  */
 401                 if (ali_cable_override(dev))
 402                         cbl = ATA_CBL_PATA40_SHORT;
 403                 else {
 404                         pci_read_config_byte(dev, 0x4a, &tmpbyte);
 405                         if ((tmpbyte & (1 << hwif->channel)) == 0)
 406                                 cbl = ATA_CBL_PATA80;
 407                 }
 408         }
 409
 410         local_irq_restore(flags);
 411
 412         return cbl;
 413 }
 414
 415 #if !defined(CONFIG_SPARC64) && !defined(CONFIG_PPC)
 416 /**
 417  *      init_hwif_ali15x3       -       Initialize the ALI IDE x86 stuff
 418  *      @hwif: interface to configure
 419  *
 420  *      Obtain the IRQ tables for an ALi based IDE solution on the PC
 421  *      class platforms. This part of the code isn't applicable to the
 422  *      Sparc and PowerPC systems.
 423  */
 424
 425 static void __devinit init_hwif_ali15x3 (ide_hwif_t *hwif)
 426 {
 427         struct pci_dev *dev = to_pci_dev(hwif->dev);
 428         u8 ideic, inmir;
 429         s8 irq_routing_table[] = { -1,  9, 3, 10, 4,  5, 7,  6,
 430                                       1, 11, 0, 12, 0, 14, 0, 15 };
 431         int irq = -1;
 432
 433         if (dev->device == PCI_DEVICE_ID_AL_M5229)
 434                 hwif->irq = hwif->channel ? 15 : 14;
 435
 436         if (isa_dev) {
 437                 /*
 438                  * read IDE interface control
 439                  */
 440                 pci_read_config_byte(isa_dev, 0x58, &ideic);
 441
 442                 /* bit0, bit1 */
 443                 ideic = ideic & 0x03;
 444
 445                 /* get IRQ for IDE Controller */
 446                 if ((hwif->channel && ideic == 0x03) ||
 447                     (!hwif->channel && !ideic)) {
 448                         /*
 449                          * get SIRQ1 routing table
 450                          */
 451                         pci_read_config_byte(isa_dev, 0x44, &inmir);
 452                         inmir = inmir & 0x0f;
 453                         irq = irq_routing_table[inmir];
 454                 } else if (hwif->channel && !(ideic & 0x01)) {
 455                         /*
 456                          * get SIRQ2 routing table
 457                          */
 458                         pci_read_config_byte(isa_dev, 0x75, &inmir);
 459                         inmir = inmir & 0x0f;
 460                         irq = irq_routing_table[inmir];
 461                 }
 462                 if(irq >= 0)
 463                         hwif->irq = irq;
 464         }
 465 }
 466 #else
 467 #define init_hwif_ali15x3 NULL
 468 #endif /* !defined(CONFIG_SPARC64) && !defined(CONFIG_PPC) */
 469
 470 /**
 471  *      init_dma_ali15x3        -       set up DMA on ALi15x3
 472  *      @hwif: IDE interface
 473  *      @d: IDE port info
 474  *
 475  *      Set up the DMA functionality on the ALi 15x3.
 476  */
 477
 478 static int __devinit init_dma_ali15x3(ide_hwif_t *hwif,
 479                                       const struct ide_port_info *d)
 480 {
 481         struct pci_dev *dev = to_pci_dev(hwif->dev);
 482         unsigned long base = ide_pci_dma_base(hwif, d);
 483
 484         if (base == 0 || ide_pci_set_master(dev, d->name) < 0)
 485                 return -1;
 486
 487         if (!hwif->channel)
 488                 outb(inb(base + 2) & 0x60, base + 2);
 489
 490         printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
 491                          hwif->name, base, base + 7);
 492
 493         if (ide_allocate_dma_engine(hwif))
 494                 return -1;
 495
 496         ide_setup_dma(hwif, base);
 497
 498         return 0;
 499 }
 500
 501 static const struct ide_port_ops ali_port_ops = {
 502         .set_pio_mode           = ali_set_pio_mode,
 503         .set_dma_mode           = ali_set_dma_mode,
 504         .udma_filter            = ali_udma_filter,
 505         .cable_detect           = ali_cable_detect,
 506 };
 507
 508 static const struct ide_dma_ops ali_dma_ops = {
 509         .dma_host_set           = ide_dma_host_set,
 510         .dma_setup              = ali15x3_dma_setup,
 511         .dma_exec_cmd           = ide_dma_exec_cmd,
 512         .dma_start              = ide_dma_start,
 513         .dma_end                = __ide_dma_end,
 514         .dma_test_irq           = ide_dma_test_irq,
 515         .dma_lost_irq           = ide_dma_lost_irq,
 516         .dma_timeout            = ide_dma_timeout,
 517 };
 518
 519 static const struct ide_port_info ali15x3_chipset __devinitdata = {
 520         .name           = "ALI15X3",
 521         .init_chipset   = init_chipset_ali15x3,
 522         .init_hwif      = init_hwif_ali15x3,
 523         .init_dma       = init_dma_ali15x3,
 524         .port_ops       = &ali_port_ops,
 525         .pio_mask       = ATA_PIO5,
 526         .swdma_mask     = ATA_SWDMA2,
 527         .mwdma_mask     = ATA_MWDMA2,
 528 };
 529
 530 /**
 531  *      alim15x3_init_one       -       set up an ALi15x3 IDE controller
 532  *      @dev: PCI device to set up
 533  *
 534  *      Perform the actual set up for an ALi15x3 that has been found by the
 535  *      hot plug layer.
 536  */
 537
 538 static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 539 {
 540         static struct pci_device_id ati_rs100[] = {
 541                 { PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100) },
 542                 { },
 543         };
 544
 545         struct ide_port_info d = ali15x3_chipset;
 546         u8 rev = dev->revision, idx = id->driver_data;
 547
 548         if (pci_dev_present(ati_rs100))
 549                 printk(KERN_WARNING "alim15x3: ATI Radeon IGP Northbridge is not yet fully tested.\n");
 550
 551         /* don't use LBA48 DMA on ALi devices before rev 0xC5 */
 552         if (rev <= 0xC4)
 553                 d.host_flags |= IDE_HFLAG_NO_LBA48_DMA;
 554
 555         if (rev >= 0x20) {
 556                 if (rev == 0x20)
 557                         d.host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 558
 559                 if (rev < 0xC2)
 560                         d.udma_mask = ATA_UDMA2;
 561                 else if (rev == 0xC2 || rev == 0xC3)
 562                         d.udma_mask = ATA_UDMA4;
 563                 else if (rev == 0xC4)
 564                         d.udma_mask = ATA_UDMA5;
 565                 else
 566                         d.udma_mask = ATA_UDMA6;
 567
 568                 d.dma_ops = &ali_dma_ops;
 569         } else {
 570                 d.host_flags |= IDE_HFLAG_NO_DMA;
 571
 572                 d.mwdma_mask = d.swdma_mask = 0;
 573         }
 574
 575         if (idx == 0)
 576                 d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
 577
 578         return ide_setup_pci_device(dev, &d);
 579 }
 580
 581
 582 static const struct pci_device_id alim15x3_pci_tbl[] = {
 583         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), 0 },
 584         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), 1 },
 585         { 0, },
 586 };
 587 MODULE_DEVICE_TABLE(pci, alim15x3_pci_tbl);
 588
 589 static struct pci_driver driver = {
 590         .name           = "ALI15x3_IDE",
 591         .id_table       = alim15x3_pci_tbl,
 592         .probe          = alim15x3_init_one,
 593 };
 594
 595 static int __init ali15x3_ide_init(void)
 596 {
 597         return ide_pci_register_driver(&driver);
 598 }
 599
 600 module_init(ali15x3_ide_init);
 601
 602 MODULE_AUTHOR("Michael Aubry, Andrzej Krzysztofowicz, CJ, Andre Hedrick, Alan Cox");
 603 MODULE_DESCRIPTION("PCI driver module for ALi 15x3 IDE");
 604 MODULE_LICENSE("GPL");