drivers/ide/pci/via82cxxx.c

   1 /*
   2  *
   3  * Version 3.49
   4  *
   5  * VIA IDE driver for Linux. Supported southbridges:
   6  *
   7  *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
   8  *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
   9  *   vt8235, vt8237, vt8237a
  10  *
  11  * Copyright (c) 2000-2002 Vojtech Pavlik
  12  * Copyright (c) 2007 Bartlomiej Zolnierkiewicz
  13  *
  14  * Based on the work of:
  15  *      Michel Aubry
  16  *      Jeff Garzik
  17  *      Andre Hedrick
  18  *
  19  * Documentation:
  20  *      Obsolete device documentation publically available from via.com.tw
  21  *      Current device documentation available under NDA only
  22  */
  23
  24 /*
  25  * This program is free software; you can redistribute it and/or modify it
  26  * under the terms of the GNU General Public License version 2 as published by
  27  * the Free Software Foundation.
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/ioport.h>
  33 #include <linux/blkdev.h>
  34 #include <linux/pci.h>
  35 #include <linux/init.h>
  36 #include <linux/ide.h>
  37 #include <linux/dmi.h>
  38
  39 #include <asm/io.h>
  40
  41 #ifdef CONFIG_PPC_CHRP
  42 #include <asm/processor.h>
  43 #endif
  44
  45 #include "ide-timing.h"
  46
  47 #define VIA_IDE_ENABLE          0x40
  48 #define VIA_IDE_CONFIG          0x41
  49 #define VIA_FIFO_CONFIG         0x43
  50 #define VIA_MISC_1              0x44
  51 #define VIA_MISC_2              0x45
  52 #define VIA_MISC_3              0x46
  53 #define VIA_DRIVE_TIMING        0x48
  54 #define VIA_8BIT_TIMING         0x4e
  55 #define VIA_ADDRESS_SETUP       0x4c
  56 #define VIA_UDMA_TIMING         0x50
  57
  58 #define VIA_BAD_PREQ            0x01 /* Crashes if PREQ# till DDACK# set */
  59 #define VIA_BAD_CLK66           0x02 /* 66 MHz clock doesn't work correctly */
  60 #define VIA_SET_FIFO            0x04 /* Needs to have FIFO split set */
  61 #define VIA_NO_UNMASK           0x08 /* Doesn't work with IRQ unmasking on */
  62 #define VIA_BAD_ID              0x10 /* Has wrong vendor ID (0x1107) */
  63 #define VIA_BAD_AST             0x20 /* Don't touch Address Setup Timing */
  64
  65 /*
  66  * VIA SouthBridge chips.
  67  */
  68
  69 static struct via_isa_bridge {
  70         char *name;
  71         u16 id;
  72         u8 rev_min;
  73         u8 rev_max;
  74         u8 udma_mask;
  75         u8 flags;
  76 } via_isa_bridges[] = {
  77         { "vx800",      PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  78         { "cx700",      PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  79         { "vt8237s",    PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  80         { "vt6410",     PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  81         { "vt8251",     PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  82         { "vt8237",     PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  83         { "vt8237a",    PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  84         { "vt8235",     PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  85         { "vt8233a",    PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  86         { "vt8233c",    PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
  87         { "vt8233",     PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
  88         { "vt8231",     PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
  89         { "vt82c686b",  PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
  90         { "vt82c686a",  PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
  91         { "vt82c686",   PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
  92         { "vt82c596b",  PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
  93         { "vt82c596a",  PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
  94         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
  95         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
  96         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
  97         { "vt82c586a",  PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
  98         { "vt82c586",   PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
  99         { "vt82c576",   PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
 100         { "vt82c576",   PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
 101         { NULL }
 102 };
 103
 104 static unsigned int via_clock;
 105 static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
 106
 107 struct via82cxxx_dev
 108 {
 109         struct via_isa_bridge *via_config;
 110         unsigned int via_80w;
 111 };
 112
 113 /**
 114  *      via_set_speed                   -       write timing registers
 115  *      @dev: PCI device
 116  *      @dn: device
 117  *      @timing: IDE timing data to use
 118  *
 119  *      via_set_speed writes timing values to the chipset registers
 120  */
 121
 122 static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
 123 {
 124         struct pci_dev *dev = hwif->pci_dev;
 125         struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
 126         u8 t;
 127
 128         if (~vdev->via_config->flags & VIA_BAD_AST) {
 129                 pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
 130                 t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
 131                 pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
 132         }
 133
 134         pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
 135                 ((FIT(timing->act8b, 1, 16) - 1) << 4) | (FIT(timing->rec8b, 1, 16) - 1));
 136
 137         pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
 138                 ((FIT(timing->active, 1, 16) - 1) << 4) | (FIT(timing->recover, 1, 16) - 1));
 139
 140         switch (vdev->via_config->udma_mask) {
 141         case ATA_UDMA2: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 5) - 2)) : 0x03; break;
 142         case ATA_UDMA4: t = timing->udma ? (0xe8 | (FIT(timing->udma, 2, 9) - 2)) : 0x0f; break;
 143         case ATA_UDMA5: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break;
 144         case ATA_UDMA6: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break;
 145         default: return;
 146         }
 147
 148         pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t);
 149 }
 150
 151 /**
 152  *      via_set_drive           -       configure transfer mode
 153  *      @drive: Drive to set up
 154  *      @speed: desired speed
 155  *
 156  *      via_set_drive() computes timing values configures the chipset to
 157  *      a desired transfer mode.  It also can be called by upper layers.
 158  */
 159
 160 static void via_set_drive(ide_drive_t *drive, const u8 speed)
 161 {
 162         ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
 163         struct via82cxxx_dev *vdev = pci_get_drvdata(drive->hwif->pci_dev);
 164         struct ide_timing t, p;
 165         unsigned int T, UT;
 166
 167         T = 1000000000 / via_clock;
 168
 169         switch (vdev->via_config->udma_mask) {
 170         case ATA_UDMA2: UT = T;   break;
 171         case ATA_UDMA4: UT = T/2; break;
 172         case ATA_UDMA5: UT = T/3; break;
 173         case ATA_UDMA6: UT = T/4; break;
 174         default:        UT = T;
 175         }
 176
 177         ide_timing_compute(drive, speed, &t, T, UT);
 178
 179         if (peer->present) {
 180                 ide_timing_compute(peer, peer->current_speed, &p, T, UT);
 181                 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
 182         }
 183
 184         via_set_speed(HWIF(drive), drive->dn, &t);
 185 }
 186
 187 /**
 188  *      via_set_pio_mode        -       set host controller for PIO mode
 189  *      @drive: drive
 190  *      @pio: PIO mode number
 191  *
 192  *      A callback from the upper layers for PIO-only tuning.
 193  */
 194
 195 static void via_set_pio_mode(ide_drive_t *drive, const u8 pio)
 196 {
 197         via_set_drive(drive, XFER_PIO_0 + pio);
 198 }
 199
 200 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
 201 {
 202         struct via_isa_bridge *via_config;
 203
 204         for (via_config = via_isa_bridges; via_config->id; via_config++)
 205                 if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
 206                         !!(via_config->flags & VIA_BAD_ID),
 207                         via_config->id, NULL))) {
 208
 209                         if ((*isa)->revision >= via_config->rev_min &&
 210                             (*isa)->revision <= via_config->rev_max)
 211                                 break;
 212                         pci_dev_put(*isa);
 213                 }
 214
 215         return via_config;
 216 }
 217
 218 /*
 219  * Check and handle 80-wire cable presence
 220  */
 221 static void __devinit via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
 222 {
 223         int i;
 224
 225         switch (vdev->via_config->udma_mask) {
 226                 case ATA_UDMA4:
 227                         for (i = 24; i >= 0; i -= 8)
 228                                 if (((u >> (i & 16)) & 8) &&
 229                                     ((u >> i) & 0x20) &&
 230                                      (((u >> i) & 7) < 2)) {
 231                                         /*
 232                                          * 2x PCI clock and
 233                                          * UDMA w/ < 3T/cycle
 234                                          */
 235                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 236                                 }
 237                         break;
 238
 239                 case ATA_UDMA5:
 240                         for (i = 24; i >= 0; i -= 8)
 241                                 if (((u >> i) & 0x10) ||
 242                                     (((u >> i) & 0x20) &&
 243                                      (((u >> i) & 7) < 4))) {
 244                                         /* BIOS 80-wire bit or
 245                                          * UDMA w/ < 60ns/cycle
 246                                          */
 247                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 248                                 }
 249                         break;
 250
 251                 case ATA_UDMA6:
 252                         for (i = 24; i >= 0; i -= 8)
 253                                 if (((u >> i) & 0x10) ||
 254                                     (((u >> i) & 0x20) &&
 255                                      (((u >> i) & 7) < 6))) {
 256                                         /* BIOS 80-wire bit or
 257                                          * UDMA w/ < 60ns/cycle
 258                                          */
 259                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 260                                 }
 261                         break;
 262         }
 263 }
 264
 265 /**
 266  *      init_chipset_via82cxxx  -       initialization handler
 267  *      @dev: PCI device
 268  *      @name: Name of interface
 269  *
 270  *      The initialization callback. Here we determine the IDE chip type
 271  *      and initialize its drive independent registers.
 272  */
 273
 274 static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const char *name)
 275 {
 276         struct pci_dev *isa = NULL;
 277         struct via82cxxx_dev *vdev;
 278         struct via_isa_bridge *via_config;
 279         u8 t, v;
 280         u32 u;
 281
 282         vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
 283         if (!vdev) {
 284                 printk(KERN_ERR "VP_IDE: out of memory :(\n");
 285                 return -ENOMEM;
 286         }
 287         pci_set_drvdata(dev, vdev);
 288
 289         /*
 290          * Find the ISA bridge to see how good the IDE is.
 291          */
 292         vdev->via_config = via_config = via_config_find(&isa);
 293
 294         /* We checked this earlier so if it fails here deeep badness
 295            is involved */
 296
 297         BUG_ON(!via_config->id);
 298
 299         /*
 300          * Detect cable and configure Clk66
 301          */
 302         pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
 303
 304         via_cable_detect(vdev, u);
 305
 306         if (via_config->udma_mask == ATA_UDMA4) {
 307                 /* Enable Clk66 */
 308                 pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
 309         } else if (via_config->flags & VIA_BAD_CLK66) {
 310                 /* Would cause trouble on 596a and 686 */
 311                 pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
 312         }
 313
 314         /*
 315          * Check whether interfaces are enabled.
 316          */
 317
 318         pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
 319
 320         /*
 321          * Set up FIFO sizes and thresholds.
 322          */
 323
 324         pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
 325
 326         /* Disable PREQ# till DDACK# */
 327         if (via_config->flags & VIA_BAD_PREQ) {
 328                 /* Would crash on 586b rev 41 */
 329                 t &= 0x7f;
 330         }
 331
 332         /* Fix FIFO split between channels */
 333         if (via_config->flags & VIA_SET_FIFO) {
 334                 t &= (t & 0x9f);
 335                 switch (v & 3) {
 336                         case 2: t |= 0x00; break;       /* 16 on primary */
 337                         case 1: t |= 0x60; break;       /* 16 on secondary */
 338                         case 3: t |= 0x20; break;       /* 8 pri 8 sec */
 339                 }
 340         }
 341
 342         pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
 343
 344         /*
 345          * Determine system bus clock.
 346          */
 347
 348         via_clock = system_bus_clock() * 1000;
 349
 350         switch (via_clock) {
 351                 case 33000: via_clock = 33333; break;
 352                 case 37000: via_clock = 37500; break;
 353                 case 41000: via_clock = 41666; break;
 354         }
 355
 356         if (via_clock < 20000 || via_clock > 50000) {
 357                 printk(KERN_WARNING "VP_IDE: User given PCI clock speed "
 358                         "impossible (%d), using 33 MHz instead.\n", via_clock);
 359                 printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want "
 360                         "to assume 80-wire cable.\n");
 361                 via_clock = 33333;
 362         }
 363
 364         /*
 365          * Print the boot message.
 366          */
 367
 368         printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %sDMA%s "
 369                 "controller on pci%s\n",
 370                 via_config->name, isa->revision,
 371                 via_config->udma_mask ? "U" : "MW",
 372                 via_dma[via_config->udma_mask ?
 373                         (fls(via_config->udma_mask) - 1) : 0],
 374                 pci_name(dev));
 375
 376         pci_dev_put(isa);
 377         return 0;
 378 }
 379
 380 /*
 381  *      Cable special cases
 382  */
 383
 384 static const struct dmi_system_id cable_dmi_table[] = {
 385         {
 386                 .ident = "Acer Ferrari 3400",
 387                 .matches = {
 388                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
 389                         DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
 390                 },
 391         },
 392         { }
 393 };
 394
 395 static int via_cable_override(struct pci_dev *pdev)
 396 {
 397         /* Systems by DMI */
 398         if (dmi_check_system(cable_dmi_table))
 399                 return 1;
 400
 401         /* Arima W730-K8/Targa Visionary 811/... */
 402         if (pdev->subsystem_vendor == 0x161F &&
 403             pdev->subsystem_device == 0x2032)
 404                 return 1;
 405
 406         return 0;
 407 }
 408
 409 static u8 __devinit via82cxxx_cable_detect(ide_hwif_t *hwif)
 410 {
 411         struct pci_dev *pdev = hwif->pci_dev;
 412         struct via82cxxx_dev *vdev = pci_get_drvdata(pdev);
 413
 414         if (via_cable_override(pdev))
 415                 return ATA_CBL_PATA40_SHORT;
 416
 417         if ((vdev->via_80w >> hwif->channel) & 1)
 418                 return ATA_CBL_PATA80;
 419         else
 420                 return ATA_CBL_PATA40;
 421 }
 422
 423 static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
 424 {
 425         struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
 426         int i;
 427
 428         hwif->set_pio_mode = &via_set_pio_mode;
 429         hwif->set_dma_mode = &via_set_drive;
 430
 431 #ifdef CONFIG_PPC_CHRP
 432         if(machine_is(chrp) && _chrp_type == _CHRP_Pegasos) {
 433                 hwif->irq = hwif->channel ? 15 : 14;
 434         }
 435 #endif
 436
 437         for (i = 0; i < 2; i++) {
 438                 hwif->drives[i].io_32bit = 1;
 439                 hwif->drives[i].unmask = (vdev->via_config->flags & VIA_NO_UNMASK) ? 0 : 1;
 440                 hwif->drives[i].autotune = 1;
 441         }
 442
 443         if (!hwif->dma_base)
 444                 return;
 445
 446         hwif->atapi_dma = 1;
 447
 448         hwif->ultra_mask = vdev->via_config->udma_mask;
 449         hwif->mwdma_mask = 0x07;
 450         hwif->swdma_mask = 0x07;
 451
 452         if (hwif->cbl != ATA_CBL_PATA40_SHORT)
 453                 hwif->cbl = via82cxxx_cable_detect(hwif);
 454 }
 455
 456 static ide_pci_device_t via82cxxx_chipsets[] __devinitdata = {
 457         {       /* 0 */
 458                 .name           = "VP_IDE",
 459                 .init_chipset   = init_chipset_via82cxxx,
 460                 .init_hwif      = init_hwif_via82cxxx,
 461                 .autodma        = NOAUTODMA,
 462                 .enablebits     = {{0x40,0x02,0x02}, {0x40,0x01,0x01}},
 463                 .bootable       = ON_BOARD,
 464                 .host_flags     = IDE_HFLAG_PIO_NO_BLACKLIST
 465                                 | IDE_HFLAG_PIO_NO_DOWNGRADE
 466                                 | IDE_HFLAG_POST_SET_MODE,
 467                 .pio_mask       = ATA_PIO5,
 468         },{     /* 1 */
 469                 .name           = "VP_IDE",
 470                 .init_chipset   = init_chipset_via82cxxx,
 471                 .init_hwif      = init_hwif_via82cxxx,
 472                 .autodma        = AUTODMA,
 473                 .enablebits     = {{0x00,0x00,0x00}, {0x00,0x00,0x00}},
 474                 .bootable       = ON_BOARD,
 475                 .host_flags     = IDE_HFLAG_PIO_NO_BLACKLIST
 476                                 | IDE_HFLAG_PIO_NO_DOWNGRADE
 477                                 | IDE_HFLAG_POST_SET_MODE,
 478                 .pio_mask       = ATA_PIO5,
 479         }
 480 };
 481
 482 static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 483 {
 484         struct pci_dev *isa = NULL;
 485         struct via_isa_bridge *via_config;
 486         /*
 487          * Find the ISA bridge and check we know what it is.
 488          */
 489         via_config = via_config_find(&isa);
 490         pci_dev_put(isa);
 491         if (!via_config->id) {
 492                 printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
 493                 return -ENODEV;
 494         }
 495         return ide_setup_pci_device(dev, &via82cxxx_chipsets[id->driver_data]);
 496 }
 497
 498 static const struct pci_device_id via_pci_tbl[] = {
 499         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1),  0 },
 500         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1),  0 },
 501         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410),      1 },
 502         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
 503         { 0, },
 504 };
 505 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
 506
 507 static struct pci_driver driver = {
 508         .name           = "VIA_IDE",
 509         .id_table       = via_pci_tbl,
 510         .probe          = via_init_one,
 511 };
 512
 513 static int __init via_ide_init(void)
 514 {
 515         return ide_pci_register_driver(&driver);
 516 }
 517
 518 module_init(via_ide_init);
 519
 520 MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick");
 521 MODULE_DESCRIPTION("PCI driver module for VIA IDE");
 522 MODULE_LICENSE("GPL");