drivers/ide/via82cxxx.c

   1 /*
   2  * VIA IDE driver for Linux. Supported southbridges:
   3  *
   4  *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
   5  *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
   6  *   vt8235, vt8237, vt8237a
   7  *
   8  * Copyright (c) 2000-2002 Vojtech Pavlik
   9  * Copyright (c) 2007 Bartlomiej Zolnierkiewicz
  10  *
  11  * Based on the work of:
  12  *      Michel Aubry
  13  *      Jeff Garzik
  14  *      Andre Hedrick
  15  *
  16  * Documentation:
  17  *      Obsolete device documentation publically available from via.com.tw
  18  *      Current device documentation available under NDA only
  19  */
  20
  21 /*
  22  * This program is free software; you can redistribute it and/or modify it
  23  * under the terms of the GNU General Public License version 2 as published by
  24  * the Free Software Foundation.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/pci.h>
  30 #include <linux/init.h>
  31 #include <linux/ide.h>
  32 #include <linux/dmi.h>
  33
  34 #ifdef CONFIG_PPC_CHRP
  35 #include <asm/processor.h>
  36 #endif
  37
  38 #define DRV_NAME "via82cxxx"
  39
  40 #define VIA_IDE_ENABLE          0x40
  41 #define VIA_IDE_CONFIG          0x41
  42 #define VIA_FIFO_CONFIG         0x43
  43 #define VIA_MISC_1              0x44
  44 #define VIA_MISC_2              0x45
  45 #define VIA_MISC_3              0x46
  46 #define VIA_DRIVE_TIMING        0x48
  47 #define VIA_8BIT_TIMING         0x4e
  48 #define VIA_ADDRESS_SETUP       0x4c
  49 #define VIA_UDMA_TIMING         0x50
  50
  51 #define VIA_BAD_PREQ            0x01 /* Crashes if PREQ# till DDACK# set */
  52 #define VIA_BAD_CLK66           0x02 /* 66 MHz clock doesn't work correctly */
  53 #define VIA_SET_FIFO            0x04 /* Needs to have FIFO split set */
  54 #define VIA_NO_UNMASK           0x08 /* Doesn't work with IRQ unmasking on */
  55 #define VIA_BAD_ID              0x10 /* Has wrong vendor ID (0x1107) */
  56 #define VIA_BAD_AST             0x20 /* Don't touch Address Setup Timing */
  57
  58 /*
  59  * VIA SouthBridge chips.
  60  */
  61
  62 static struct via_isa_bridge {
  63         char *name;
  64         u16 id;
  65         u8 rev_min;
  66         u8 rev_max;
  67         u8 udma_mask;
  68         u8 flags;
  69 } via_isa_bridges[] = {
  70         { "vx800",      PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  71         { "cx700",      PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  72         { "vt8237s",    PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  73         { "vt6410",     PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  74         { "vt8251",     PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  75         { "vt8237",     PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  76         { "vt8237a",    PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  77         { "vt8235",     PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  78         { "vt8233a",    PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
  79         { "vt8233c",    PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
  80         { "vt8233",     PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
  81         { "vt8231",     PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
  82         { "vt82c686b",  PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
  83         { "vt82c686a",  PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
  84         { "vt82c686",   PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
  85         { "vt82c596b",  PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
  86         { "vt82c596a",  PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
  87         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
  88         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
  89         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
  90         { "vt82c586a",  PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
  91         { "vt82c586",   PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
  92         { "vt82c576",   PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
  93         { "vt82c576",   PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
  94         { NULL }
  95 };
  96
  97 static unsigned int via_clock;
  98 static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
  99
 100 struct via82cxxx_dev
 101 {
 102         struct via_isa_bridge *via_config;
 103         unsigned int via_80w;
 104 };
 105
 106 /**
 107  *      via_set_speed                   -       write timing registers
 108  *      @dev: PCI device
 109  *      @dn: device
 110  *      @timing: IDE timing data to use
 111  *
 112  *      via_set_speed writes timing values to the chipset registers
 113  */
 114
 115 static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
 116 {
 117         struct pci_dev *dev = to_pci_dev(hwif->dev);
 118         struct ide_host *host = pci_get_drvdata(dev);
 119         struct via82cxxx_dev *vdev = host->host_priv;
 120         u8 t;
 121
 122         if (~vdev->via_config->flags & VIA_BAD_AST) {
 123                 pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
 124                 t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
 125                 pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
 126         }
 127
 128         pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
 129                 ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
 130
 131         pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
 132                 ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
 133
 134         switch (vdev->via_config->udma_mask) {
 135         case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
 136         case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
 137         case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
 138         case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
 139         default: return;
 140         }
 141
 142         pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t);
 143 }
 144
 145 /**
 146  *      via_set_drive           -       configure transfer mode
 147  *      @drive: Drive to set up
 148  *      @speed: desired speed
 149  *
 150  *      via_set_drive() computes timing values configures the chipset to
 151  *      a desired transfer mode.  It also can be called by upper layers.
 152  */
 153
 154 static void via_set_drive(ide_drive_t *drive, const u8 speed)
 155 {
 156         ide_hwif_t *hwif = drive->hwif;
 157         ide_drive_t *peer = ide_get_pair_dev(drive);
 158         struct pci_dev *dev = to_pci_dev(hwif->dev);
 159         struct ide_host *host = pci_get_drvdata(dev);
 160         struct via82cxxx_dev *vdev = host->host_priv;
 161         struct ide_timing t, p;
 162         unsigned int T, UT;
 163
 164         T = 1000000000 / via_clock;
 165
 166         switch (vdev->via_config->udma_mask) {
 167         case ATA_UDMA2: UT = T;   break;
 168         case ATA_UDMA4: UT = T/2; break;
 169         case ATA_UDMA5: UT = T/3; break;
 170         case ATA_UDMA6: UT = T/4; break;
 171         default:        UT = T;
 172         }
 173
 174         ide_timing_compute(drive, speed, &t, T, UT);
 175
 176         if (peer) {
 177                 ide_timing_compute(peer, peer->current_speed, &p, T, UT);
 178                 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
 179         }
 180
 181         via_set_speed(HWIF(drive), drive->dn, &t);
 182 }
 183
 184 /**
 185  *      via_set_pio_mode        -       set host controller for PIO mode
 186  *      @drive: drive
 187  *      @pio: PIO mode number
 188  *
 189  *      A callback from the upper layers for PIO-only tuning.
 190  */
 191
 192 static void via_set_pio_mode(ide_drive_t *drive, const u8 pio)
 193 {
 194         via_set_drive(drive, XFER_PIO_0 + pio);
 195 }
 196
 197 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
 198 {
 199         struct via_isa_bridge *via_config;
 200
 201         for (via_config = via_isa_bridges; via_config->id; via_config++)
 202                 if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
 203                         !!(via_config->flags & VIA_BAD_ID),
 204                         via_config->id, NULL))) {
 205
 206                         if ((*isa)->revision >= via_config->rev_min &&
 207                             (*isa)->revision <= via_config->rev_max)
 208                                 break;
 209                         pci_dev_put(*isa);
 210                 }
 211
 212         return via_config;
 213 }
 214
 215 /*
 216  * Check and handle 80-wire cable presence
 217  */
 218 static void via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
 219 {
 220         int i;
 221
 222         switch (vdev->via_config->udma_mask) {
 223                 case ATA_UDMA4:
 224                         for (i = 24; i >= 0; i -= 8)
 225                                 if (((u >> (i & 16)) & 8) &&
 226                                     ((u >> i) & 0x20) &&
 227                                      (((u >> i) & 7) < 2)) {
 228                                         /*
 229                                          * 2x PCI clock and
 230                                          * UDMA w/ < 3T/cycle
 231                                          */
 232                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 233                                 }
 234                         break;
 235
 236                 case ATA_UDMA5:
 237                         for (i = 24; i >= 0; i -= 8)
 238                                 if (((u >> i) & 0x10) ||
 239                                     (((u >> i) & 0x20) &&
 240                                      (((u >> i) & 7) < 4))) {
 241                                         /* BIOS 80-wire bit or
 242                                          * UDMA w/ < 60ns/cycle
 243                                          */
 244                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 245                                 }
 246                         break;
 247
 248                 case ATA_UDMA6:
 249                         for (i = 24; i >= 0; i -= 8)
 250                                 if (((u >> i) & 0x10) ||
 251                                     (((u >> i) & 0x20) &&
 252                                      (((u >> i) & 7) < 6))) {
 253                                         /* BIOS 80-wire bit or
 254                                          * UDMA w/ < 60ns/cycle
 255                                          */
 256                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
 257                                 }
 258                         break;
 259         }
 260 }
 261
 262 /**
 263  *      init_chipset_via82cxxx  -       initialization handler
 264  *      @dev: PCI device
 265  *
 266  *      The initialization callback. Here we determine the IDE chip type
 267  *      and initialize its drive independent registers.
 268  */
 269
 270 static unsigned int init_chipset_via82cxxx(struct pci_dev *dev)
 271 {
 272         struct ide_host *host = pci_get_drvdata(dev);
 273         struct via82cxxx_dev *vdev = host->host_priv;
 274         struct via_isa_bridge *via_config = vdev->via_config;
 275         u8 t, v;
 276         u32 u;
 277
 278         /*
 279          * Detect cable and configure Clk66
 280          */
 281         pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
 282
 283         via_cable_detect(vdev, u);
 284
 285         if (via_config->udma_mask == ATA_UDMA4) {
 286                 /* Enable Clk66 */
 287                 pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
 288         } else if (via_config->flags & VIA_BAD_CLK66) {
 289                 /* Would cause trouble on 596a and 686 */
 290                 pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
 291         }
 292
 293         /*
 294          * Check whether interfaces are enabled.
 295          */
 296
 297         pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
 298
 299         /*
 300          * Set up FIFO sizes and thresholds.
 301          */
 302
 303         pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
 304
 305         /* Disable PREQ# till DDACK# */
 306         if (via_config->flags & VIA_BAD_PREQ) {
 307                 /* Would crash on 586b rev 41 */
 308                 t &= 0x7f;
 309         }
 310
 311         /* Fix FIFO split between channels */
 312         if (via_config->flags & VIA_SET_FIFO) {
 313                 t &= (t & 0x9f);
 314                 switch (v & 3) {
 315                         case 2: t |= 0x00; break;       /* 16 on primary */
 316                         case 1: t |= 0x60; break;       /* 16 on secondary */
 317                         case 3: t |= 0x20; break;       /* 8 pri 8 sec */
 318                 }
 319         }
 320
 321         pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
 322
 323         return 0;
 324 }
 325
 326 /*
 327  *      Cable special cases
 328  */
 329
 330 static const struct dmi_system_id cable_dmi_table[] = {
 331         {
 332                 .ident = "Acer Ferrari 3400",
 333                 .matches = {
 334                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
 335                         DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
 336                 },
 337         },
 338         { }
 339 };
 340
 341 static int via_cable_override(struct pci_dev *pdev)
 342 {
 343         /* Systems by DMI */
 344         if (dmi_check_system(cable_dmi_table))
 345                 return 1;
 346
 347         /* Arima W730-K8/Targa Visionary 811/... */
 348         if (pdev->subsystem_vendor == 0x161F &&
 349             pdev->subsystem_device == 0x2032)
 350                 return 1;
 351
 352         return 0;
 353 }
 354
 355 static u8 via82cxxx_cable_detect(ide_hwif_t *hwif)
 356 {
 357         struct pci_dev *pdev = to_pci_dev(hwif->dev);
 358         struct ide_host *host = pci_get_drvdata(pdev);
 359         struct via82cxxx_dev *vdev = host->host_priv;
 360
 361         if (via_cable_override(pdev))
 362                 return ATA_CBL_PATA40_SHORT;
 363
 364         if ((vdev->via_80w >> hwif->channel) & 1)
 365                 return ATA_CBL_PATA80;
 366         else
 367                 return ATA_CBL_PATA40;
 368 }
 369
 370 static const struct ide_port_ops via_port_ops = {
 371         .set_pio_mode           = via_set_pio_mode,
 372         .set_dma_mode           = via_set_drive,
 373         .cable_detect           = via82cxxx_cable_detect,
 374 };
 375
 376 static const struct ide_port_info via82cxxx_chipset __devinitdata = {
 377         .name           = DRV_NAME,
 378         .init_chipset   = init_chipset_via82cxxx,
 379         .enablebits     = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
 380         .port_ops       = &via_port_ops,
 381         .host_flags     = IDE_HFLAG_PIO_NO_BLACKLIST |
 382                           IDE_HFLAG_POST_SET_MODE |
 383                           IDE_HFLAG_IO_32BIT,
 384         .pio_mask       = ATA_PIO5,
 385         .swdma_mask     = ATA_SWDMA2,
 386         .mwdma_mask     = ATA_MWDMA2,
 387 };
 388
 389 static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 390 {
 391         struct pci_dev *isa = NULL;
 392         struct via_isa_bridge *via_config;
 393         struct via82cxxx_dev *vdev;
 394         int rc;
 395         u8 idx = id->driver_data;
 396         struct ide_port_info d;
 397
 398         d = via82cxxx_chipset;
 399
 400         /*
 401          * Find the ISA bridge and check we know what it is.
 402          */
 403         via_config = via_config_find(&isa);
 404         if (!via_config->id) {
 405                 printk(KERN_WARNING DRV_NAME " %s: unknown chipset, skipping\n",
 406                         pci_name(dev));
 407                 return -ENODEV;
 408         }
 409
 410         /*
 411          * Print the boot message.
 412          */
 413         printk(KERN_INFO DRV_NAME " %s: VIA %s (rev %02x) IDE %sDMA%s\n",
 414                 pci_name(dev), via_config->name, isa->revision,
 415                 via_config->udma_mask ? "U" : "MW",
 416                 via_dma[via_config->udma_mask ?
 417                         (fls(via_config->udma_mask) - 1) : 0]);
 418
 419         pci_dev_put(isa);
 420
 421         /*
 422          * Determine system bus clock.
 423          */
 424         via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
 425
 426         switch (via_clock) {
 427         case 33000: via_clock = 33333; break;
 428         case 37000: via_clock = 37500; break;
 429         case 41000: via_clock = 41666; break;
 430         }
 431
 432         if (via_clock < 20000 || via_clock > 50000) {
 433                 printk(KERN_WARNING DRV_NAME ": User given PCI clock speed "
 434                         "impossible (%d), using 33 MHz instead.\n", via_clock);
 435                 printk(KERN_WARNING DRV_NAME ": Use ide0=ata66 if you want "
 436                         "to assume 80-wire cable.\n");
 437                 via_clock = 33333;
 438         }
 439
 440         if (idx == 0)
 441                 d.host_flags |= IDE_HFLAG_NO_AUTODMA;
 442         else
 443                 d.enablebits[1].reg = d.enablebits[0].reg = 0;
 444
 445         if ((via_config->flags & VIA_NO_UNMASK) == 0)
 446                 d.host_flags |= IDE_HFLAG_UNMASK_IRQS;
 447
 448 #ifdef CONFIG_PPC_CHRP
 449         if (machine_is(chrp) && _chrp_type == _CHRP_Pegasos)
 450                 d.host_flags |= IDE_HFLAG_FORCE_LEGACY_IRQS;
 451 #endif
 452
 453         d.udma_mask = via_config->udma_mask;
 454
 455         vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
 456         if (!vdev) {
 457                 printk(KERN_ERR DRV_NAME " %s: out of memory :(\n",
 458                         pci_name(dev));
 459                 return -ENOMEM;
 460         }
 461
 462         vdev->via_config = via_config;
 463
 464         rc = ide_pci_init_one(dev, &d, vdev);
 465         if (rc)
 466                 kfree(vdev);
 467
 468         return rc;
 469 }
 470
 471 static void __devexit via_remove(struct pci_dev *dev)
 472 {
 473         struct ide_host *host = pci_get_drvdata(dev);
 474         struct via82cxxx_dev *vdev = host->host_priv;
 475
 476         ide_pci_remove(dev);
 477         kfree(vdev);
 478 }
 479
 480 static const struct pci_device_id via_pci_tbl[] = {
 481         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1),  0 },
 482         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1),  0 },
 483         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
 484         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410),      1 },
 485         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
 486         { 0, },
 487 };
 488 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
 489
 490 static struct pci_driver via_pci_driver = {
 491         .name           = "VIA_IDE",
 492         .id_table       = via_pci_tbl,
 493         .probe          = via_init_one,
 494         .remove         = __devexit_p(via_remove),
 495         .suspend        = ide_pci_suspend,
 496         .resume         = ide_pci_resume,
 497 };
 498
 499 static int __init via_ide_init(void)
 500 {
 501         return ide_pci_register_driver(&via_pci_driver);
 502 }
 503
 504 static void __exit via_ide_exit(void)
 505 {
 506         pci_unregister_driver(&via_pci_driver);
 507 }
 508
 509 module_init(via_ide_init);
 510 module_exit(via_ide_exit);
 511
 512 MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick");
 513 MODULE_DESCRIPTION("PCI driver module for VIA IDE");
 514 MODULE_LICENSE("GPL");