drivers/ata/pata_ali.c

   1 /*
   2  * pata_ali.c   - ALI 15x3 PATA for new ATA layer
   3  *                        (C) 2005 Red Hat Inc
   4  *
   5  * based in part upon
   6  * linux/drivers/ide/pci/alim15x3.c             Version 0.17    2003/01/02
   7  *
   8  *  Copyright (C) 1998-2000 Michel Aubry, Maintainer
   9  *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
  10  *  Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
  11  *
  12  *  Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
  13  *  May be copied or modified under the terms of the GNU General Public License
  14  *  Copyright (C) 2002 Alan Cox <alan@redhat.com>
  15  *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
  16  *
  17  *  Documentation
  18  *      Chipset documentation available under NDA only
  19  *
  20  *  TODO/CHECK
  21  *      Cannot have ATAPI on both master & slave for rev < c2 (???) but
  22  *      otherwise should do atapi DMA (For now for old we do PIO only for
  23  *      ATAPI)
  24  *      Review Sunblade workaround.
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/pci.h>
  30 #include <linux/init.h>
  31 #include <linux/blkdev.h>
  32 #include <linux/delay.h>
  33 #include <scsi/scsi_host.h>
  34 #include <linux/libata.h>
  35 #include <linux/dmi.h>
  36
  37 #define DRV_NAME "pata_ali"
  38 #define DRV_VERSION "0.7.8"
  39
  40 static int ali_atapi_dma = 0;
  41 module_param_named(atapi_dma, ali_atapi_dma, int, 0644);
  42 MODULE_PARM_DESC(atapi_dma, "Enable ATAPI DMA (0=disable, 1=enable)");
  43
  44 static struct pci_dev *ali_isa_bridge;
  45
  46 /*
  47  *      Cable special cases
  48  */
  49
  50 static const struct dmi_system_id cable_dmi_table[] = {
  51         {
  52                 .ident = "HP Pavilion N5430",
  53                 .matches = {
  54                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
  55                         DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
  56                 },
  57         },
  58         {
  59                 .ident = "Toshiba Satellite S1800-814",
  60                 .matches = {
  61                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
  62                         DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
  63                 },
  64         },
  65         { }
  66 };
  67
  68 static int ali_cable_override(struct pci_dev *pdev)
  69 {
  70         /* Fujitsu P2000 */
  71         if (pdev->subsystem_vendor == 0x10CF && pdev->subsystem_device == 0x10AF)
  72                 return 1;
  73         /* Mitac 8317 (Winbook-A) and relatives */
  74         if (pdev->subsystem_vendor == 0x1071 && pdev->subsystem_device == 0x8317)
  75                 return 1;
  76         /* Systems by DMI */
  77         if (dmi_check_system(cable_dmi_table))
  78                 return 1;
  79         return 0;
  80 }
  81
  82 /**
  83  *      ali_c2_cable_detect     -       cable detection
  84  *      @ap: ATA port
  85  *
  86  *      Perform cable detection for C2 and later revisions
  87  */
  88
  89 static int ali_c2_cable_detect(struct ata_port *ap)
  90 {
  91         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  92         u8 ata66;
  93
  94         /* Certain laptops use short but suitable cables and don't
  95            implement the detect logic */
  96
  97         if (ali_cable_override(pdev))
  98                 return ATA_CBL_PATA40_SHORT;
  99
 100         /* Host view cable detect 0x4A bit 0 primary bit 1 secondary
 101            Bit set for 40 pin */
 102         pci_read_config_byte(pdev, 0x4A, &ata66);
 103         if (ata66 & (1 << ap->port_no))
 104                 return ATA_CBL_PATA40;
 105         else
 106                 return ATA_CBL_PATA80;
 107 }
 108
 109 /**
 110  *      ali_20_filter           -       filter for earlier ALI DMA
 111  *      @ap: ALi ATA port
 112  *      @adev: attached device
 113  *
 114  *      Ensure that we do not do DMA on CD devices. We may be able to
 115  *      fix that later on. Also ensure we do not do UDMA on WDC drives
 116  */
 117
 118 static unsigned long ali_20_filter(struct ata_device *adev, unsigned long mask)
 119 {
 120         char model_num[ATA_ID_PROD_LEN + 1];
 121         /* No DMA on anything but a disk for now */
 122         if (adev->class != ATA_DEV_ATA)
 123                 mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
 124         ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
 125         if (strstr(model_num, "WDC"))
 126                 return mask &= ~ATA_MASK_UDMA;
 127         return mask;
 128 }
 129
 130 /**
 131  *      ali_fifo_control        -       FIFO manager
 132  *      @ap: ALi channel to control
 133  *      @adev: device for FIFO control
 134  *      @on: 0 for off 1 for on
 135  *
 136  *      Enable or disable the FIFO on a given device. Because of the way the
 137  *      ALi FIFO works it provides a boost on ATA disk but can be confused by
 138  *      ATAPI and we must therefore manage it.
 139  */
 140
 141 static void ali_fifo_control(struct ata_port *ap, struct ata_device *adev, int on)
 142 {
 143         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 144         int pio_fifo = 0x54 + ap->port_no;
 145         u8 fifo;
 146         int shift = 4 * adev->devno;
 147
 148         /* ATA - FIFO on set nibble to 0x05, ATAPI - FIFO off, set nibble to
 149            0x00. Not all the docs agree but the behaviour we now use is the
 150            one stated in the BIOS Programming Guide */
 151
 152         pci_read_config_byte(pdev, pio_fifo, &fifo);
 153         fifo &= ~(0x0F << shift);
 154         fifo |= (on << shift);
 155         pci_write_config_byte(pdev, pio_fifo, fifo);
 156 }
 157
 158 /**
 159  *      ali_program_modes       -       load mode registers
 160  *      @ap: ALi channel to load
 161  *      @adev: Device the timing is for
 162  *      @t: timing data
 163  *      @ultra: UDMA timing or zero for off
 164  *
 165  *      Loads the timing registers for cmd/data and disable UDMA if
 166  *      ultra is zero. If ultra is set then load and enable the UDMA
 167  *      timing but do not touch the command/data timing.
 168  */
 169
 170 static void ali_program_modes(struct ata_port *ap, struct ata_device *adev, struct ata_timing *t, u8 ultra)
 171 {
 172         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 173         int cas = 0x58 + 4 * ap->port_no;       /* Command timing */
 174         int cbt = 0x59 + 4 * ap->port_no;       /* Command timing */
 175         int drwt = 0x5A + 4 * ap->port_no + adev->devno; /* R/W timing */
 176         int udmat = 0x56 + ap->port_no; /* UDMA timing */
 177         int shift = 4 * adev->devno;
 178         u8 udma;
 179
 180         if (t != NULL) {
 181                 t->setup = clamp_val(t->setup, 1, 8) & 7;
 182                 t->act8b = clamp_val(t->act8b, 1, 8) & 7;
 183                 t->rec8b = clamp_val(t->rec8b, 1, 16) & 15;
 184                 t->active = clamp_val(t->active, 1, 8) & 7;
 185                 t->recover = clamp_val(t->recover, 1, 16) & 15;
 186
 187                 pci_write_config_byte(pdev, cas, t->setup);
 188                 pci_write_config_byte(pdev, cbt, (t->act8b << 4) | t->rec8b);
 189                 pci_write_config_byte(pdev, drwt, (t->active << 4) | t->recover);
 190         }
 191
 192         /* Set up the UDMA enable */
 193         pci_read_config_byte(pdev, udmat, &udma);
 194         udma &= ~(0x0F << shift);
 195         udma |= ultra << shift;
 196         pci_write_config_byte(pdev, udmat, udma);
 197 }
 198
 199 /**
 200  *      ali_set_piomode -       set initial PIO mode data
 201  *      @ap: ATA interface
 202  *      @adev: ATA device
 203  *
 204  *      Program the ALi registers for PIO mode.
 205  */
 206
 207 static void ali_set_piomode(struct ata_port *ap, struct ata_device *adev)
 208 {
 209         struct ata_device *pair = ata_dev_pair(adev);
 210         struct ata_timing t;
 211         unsigned long T =  1000000000 / 33333;  /* PCI clock based */
 212
 213         ata_timing_compute(adev, adev->pio_mode, &t, T, 1);
 214         if (pair) {
 215                 struct ata_timing p;
 216                 ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
 217                 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 218                 if (pair->dma_mode) {
 219                         ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
 220                         ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 221                 }
 222         }
 223
 224         /* PIO FIFO is only permitted on ATA disk */
 225         if (adev->class != ATA_DEV_ATA)
 226                 ali_fifo_control(ap, adev, 0x00);
 227         ali_program_modes(ap, adev, &t, 0);
 228         if (adev->class == ATA_DEV_ATA)
 229                 ali_fifo_control(ap, adev, 0x05);
 230
 231 }
 232
 233 /**
 234  *      ali_set_dmamode -       set initial DMA mode data
 235  *      @ap: ATA interface
 236  *      @adev: ATA device
 237  *
 238  *      Program the ALi registers for DMA mode.
 239  */
 240
 241 static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 242 {
 243         static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
 244         struct ata_device *pair = ata_dev_pair(adev);
 245         struct ata_timing t;
 246         unsigned long T =  1000000000 / 33333;  /* PCI clock based */
 247         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 248
 249
 250         if (adev->class == ATA_DEV_ATA)
 251                 ali_fifo_control(ap, adev, 0x08);
 252
 253         if (adev->dma_mode >= XFER_UDMA_0) {
 254                 ali_program_modes(ap, adev, NULL, udma_timing[adev->dma_mode - XFER_UDMA_0]);
 255                 if (adev->dma_mode >= XFER_UDMA_3) {
 256                         u8 reg4b;
 257                         pci_read_config_byte(pdev, 0x4B, &reg4b);
 258                         reg4b |= 1;
 259                         pci_write_config_byte(pdev, 0x4B, reg4b);
 260                 }
 261         } else {
 262                 ata_timing_compute(adev, adev->dma_mode, &t, T, 1);
 263                 if (pair) {
 264                         struct ata_timing p;
 265                         ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
 266                         ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 267                         if (pair->dma_mode) {
 268                                 ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
 269                                 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 270                         }
 271                 }
 272                 ali_program_modes(ap, adev, &t, 0);
 273         }
 274 }
 275
 276 /**
 277  *      ali_warn_atapi_dma      -       Warn about ATAPI DMA disablement
 278  *      @adev: Device
 279  *
 280  *      Whine about ATAPI DMA disablement if @adev is an ATAPI device.
 281  *      Can be used as ->dev_config.
 282  */
 283
 284 static void ali_warn_atapi_dma(struct ata_device *adev)
 285 {
 286         struct ata_eh_context *ehc = &adev->link->eh_context;
 287         int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
 288
 289         if (print_info && adev->class == ATA_DEV_ATAPI && !ali_atapi_dma) {
 290                 ata_dev_warn(adev,
 291                              "WARNING: ATAPI DMA disabled for reliability issues.  It can be enabled\n");
 292                 ata_dev_warn(adev,
 293                              "WARNING: via pata_ali.atapi_dma modparam or corresponding sysfs node.\n");
 294         }
 295 }
 296
 297 /**
 298  *      ali_lock_sectors        -       Keep older devices to 255 sector mode
 299  *      @adev: Device
 300  *
 301  *      Called during the bus probe for each device that is found. We use
 302  *      this call to lock the sector count of the device to 255 or less on
 303  *      older ALi controllers. If we didn't do this then large I/O's would
 304  *      require LBA48 commands which the older ALi requires are issued by
 305  *      slower PIO methods
 306  */
 307
 308 static void ali_lock_sectors(struct ata_device *adev)
 309 {
 310         adev->max_sectors = 255;
 311         ali_warn_atapi_dma(adev);
 312 }
 313
 314 /**
 315  *      ali_check_atapi_dma     -       DMA check for most ALi controllers
 316  *      @adev: Device
 317  *
 318  *      Called to decide whether commands should be sent by DMA or PIO
 319  */
 320
 321 static int ali_check_atapi_dma(struct ata_queued_cmd *qc)
 322 {
 323         if (!ali_atapi_dma) {
 324                 /* FIXME: pata_ali can't do ATAPI DMA reliably but the
 325                  * IDE alim15x3 driver can.  I tried lots of things
 326                  * but couldn't find what the actual difference was.
 327                  * If you got an idea, please write it to
 328                  * linux-ide@vger.kernel.org and cc htejun@gmail.com.
 329                  *
 330                  * Disable ATAPI DMA for now.
 331                  */
 332                 return -EOPNOTSUPP;
 333         }
 334
 335         /* If its not a media command, its not worth it */
 336         if (atapi_cmd_type(qc->cdb[0]) == ATAPI_MISC)
 337                 return -EOPNOTSUPP;
 338         return 0;
 339 }
 340
 341 static void ali_c2_c3_postreset(struct ata_link *link, unsigned int *classes)
 342 {
 343         u8 r;
 344         int port_bit = 4 << link->ap->port_no;
 345
 346         /* If our bridge is an ALI 1533 then do the extra work */
 347         if (ali_isa_bridge) {
 348                 /* Tristate and re-enable the bus signals */
 349                 pci_read_config_byte(ali_isa_bridge, 0x58, &r);
 350                 r &= ~port_bit;
 351                 pci_write_config_byte(ali_isa_bridge, 0x58, r);
 352                 r |= port_bit;
 353                 pci_write_config_byte(ali_isa_bridge, 0x58, r);
 354         }
 355         ata_sff_postreset(link, classes);
 356 }
 357
 358 static struct scsi_host_template ali_sht = {
 359         ATA_BMDMA_SHT(DRV_NAME),
 360 };
 361
 362 /*
 363  *      Port operations for PIO only ALi
 364  */
 365
 366 static struct ata_port_operations ali_early_port_ops = {
 367         .inherits       = &ata_sff_port_ops,
 368         .cable_detect   = ata_cable_40wire,
 369         .set_piomode    = ali_set_piomode,
 370         .sff_data_xfer  = ata_sff_data_xfer32,
 371 };
 372
 373 static const struct ata_port_operations ali_dma_base_ops = {
 374         .inherits       = &ata_bmdma32_port_ops,
 375         .set_piomode    = ali_set_piomode,
 376         .set_dmamode    = ali_set_dmamode,
 377 };
 378
 379 /*
 380  *      Port operations for DMA capable ALi without cable
 381  *      detect
 382  */
 383 static struct ata_port_operations ali_20_port_ops = {
 384         .inherits       = &ali_dma_base_ops,
 385         .cable_detect   = ata_cable_40wire,
 386         .mode_filter    = ali_20_filter,
 387         .check_atapi_dma = ali_check_atapi_dma,
 388         .dev_config     = ali_lock_sectors,
 389 };
 390
 391 /*
 392  *      Port operations for DMA capable ALi with cable detect
 393  */
 394 static struct ata_port_operations ali_c2_port_ops = {
 395         .inherits       = &ali_dma_base_ops,
 396         .check_atapi_dma = ali_check_atapi_dma,
 397         .cable_detect   = ali_c2_cable_detect,
 398         .dev_config     = ali_lock_sectors,
 399         .postreset      = ali_c2_c3_postreset,
 400 };
 401
 402 /*
 403  *      Port operations for DMA capable ALi with cable detect
 404  */
 405 static struct ata_port_operations ali_c4_port_ops = {
 406         .inherits       = &ali_dma_base_ops,
 407         .check_atapi_dma = ali_check_atapi_dma,
 408         .cable_detect   = ali_c2_cable_detect,
 409         .dev_config     = ali_lock_sectors,
 410 };
 411
 412 /*
 413  *      Port operations for DMA capable ALi with cable detect and LBA48
 414  */
 415 static struct ata_port_operations ali_c5_port_ops = {
 416         .inherits       = &ali_dma_base_ops,
 417         .check_atapi_dma = ali_check_atapi_dma,
 418         .dev_config     = ali_warn_atapi_dma,
 419         .cable_detect   = ali_c2_cable_detect,
 420 };
 421
 422
 423 /**
 424  *      ali_init_chipset        -       chip setup function
 425  *      @pdev: PCI device of ATA controller
 426  *
 427  *      Perform the setup on the device that must be done both at boot
 428  *      and at resume time.
 429  */
 430
 431 static void ali_init_chipset(struct pci_dev *pdev)
 432 {
 433         u8 tmp;
 434         struct pci_dev *north;
 435
 436         /*
 437          * The chipset revision selects the driver operations and
 438          * mode data.
 439          */
 440
 441         if (pdev->revision <= 0x20) {
 442                 pci_read_config_byte(pdev, 0x53, &tmp);
 443                 tmp |= 0x03;
 444                 pci_write_config_byte(pdev, 0x53, tmp);
 445         } else {
 446                 pci_read_config_byte(pdev, 0x4a, &tmp);
 447                 pci_write_config_byte(pdev, 0x4a, tmp | 0x20);
 448                 pci_read_config_byte(pdev, 0x4B, &tmp);
 449                 if (pdev->revision < 0xC2)
 450                         /* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
 451                         /* Clear CD-ROM DMA write bit */
 452                         tmp &= 0x7F;
 453                 /* Cable and UDMA */
 454                 if (pdev->revision >= 0xc2)
 455                         tmp |= 0x01;
 456                 pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
 457                 /*
 458                  * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
 459                  * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
 460                  * via 0x54/55.
 461                  */
 462                 pci_read_config_byte(pdev, 0x53, &tmp);
 463                 if (pdev->revision >= 0xc7)
 464                         tmp |= 0x03;
 465                 else
 466                         tmp |= 0x01;    /* CD_ROM enable for DMA */
 467                 pci_write_config_byte(pdev, 0x53, tmp);
 468         }
 469         north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 470         if (north && north->vendor == PCI_VENDOR_ID_AL && ali_isa_bridge) {
 471                 /* Configure the ALi bridge logic. For non ALi rely on BIOS.
 472                    Set the south bridge enable bit */
 473                 pci_read_config_byte(ali_isa_bridge, 0x79, &tmp);
 474                 if (pdev->revision == 0xC2)
 475                         pci_write_config_byte(ali_isa_bridge, 0x79, tmp | 0x04);
 476                 else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
 477                         pci_write_config_byte(ali_isa_bridge, 0x79, tmp | 0x02);
 478         }
 479         pci_dev_put(north);
 480         ata_pci_bmdma_clear_simplex(pdev);
 481 }
 482 /**
 483  *      ali_init_one            -       discovery callback
 484  *      @pdev: PCI device ID
 485  *      @id: PCI table info
 486  *
 487  *      An ALi IDE interface has been discovered. Figure out what revision
 488  *      and perform configuration work before handing it to the ATA layer
 489  */
 490
 491 static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 492 {
 493         static const struct ata_port_info info_early = {
 494                 .flags = ATA_FLAG_SLAVE_POSS,
 495                 .pio_mask = ATA_PIO4,
 496                 .port_ops = &ali_early_port_ops
 497         };
 498         /* Revision 0x20 added DMA */
 499         static const struct ata_port_info info_20 = {
 500                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
 501                                                         ATA_FLAG_IGN_SIMPLEX,
 502                 .pio_mask = ATA_PIO4,
 503                 .mwdma_mask = ATA_MWDMA2,
 504                 .port_ops = &ali_20_port_ops
 505         };
 506         /* Revision 0x20 with support logic added UDMA */
 507         static const struct ata_port_info info_20_udma = {
 508                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
 509                                                         ATA_FLAG_IGN_SIMPLEX,
 510                 .pio_mask = ATA_PIO4,
 511                 .mwdma_mask = ATA_MWDMA2,
 512                 .udma_mask = ATA_UDMA2,
 513                 .port_ops = &ali_20_port_ops
 514         };
 515         /* Revision 0xC2 adds UDMA66 */
 516         static const struct ata_port_info info_c2 = {
 517                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
 518                                                         ATA_FLAG_IGN_SIMPLEX,
 519                 .pio_mask = ATA_PIO4,
 520                 .mwdma_mask = ATA_MWDMA2,
 521                 .udma_mask = ATA_UDMA4,
 522                 .port_ops = &ali_c2_port_ops
 523         };
 524         /* Revision 0xC3 is UDMA66 for now */
 525         static const struct ata_port_info info_c3 = {
 526                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
 527                                                         ATA_FLAG_IGN_SIMPLEX,
 528                 .pio_mask = ATA_PIO4,
 529                 .mwdma_mask = ATA_MWDMA2,
 530                 .udma_mask = ATA_UDMA4,
 531                 .port_ops = &ali_c2_port_ops
 532         };
 533         /* Revision 0xC4 is UDMA100 */
 534         static const struct ata_port_info info_c4 = {
 535                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48 |
 536                                                         ATA_FLAG_IGN_SIMPLEX,
 537                 .pio_mask = ATA_PIO4,
 538                 .mwdma_mask = ATA_MWDMA2,
 539                 .udma_mask = ATA_UDMA5,
 540                 .port_ops = &ali_c4_port_ops
 541         };
 542         /* Revision 0xC5 is UDMA133 with LBA48 DMA */
 543         static const struct ata_port_info info_c5 = {
 544                 .flags = ATA_FLAG_SLAVE_POSS |  ATA_FLAG_IGN_SIMPLEX,
 545                 .pio_mask = ATA_PIO4,
 546                 .mwdma_mask = ATA_MWDMA2,
 547                 .udma_mask = ATA_UDMA6,
 548                 .port_ops = &ali_c5_port_ops
 549         };
 550
 551         const struct ata_port_info *ppi[] = { NULL, NULL };
 552         u8 tmp;
 553         int rc;
 554
 555         rc = pcim_enable_device(pdev);
 556         if (rc)
 557                 return rc;
 558
 559         /*
 560          * The chipset revision selects the driver operations and
 561          * mode data.
 562          */
 563
 564         if (pdev->revision < 0x20) {
 565                 ppi[0] = &info_early;
 566         } else if (pdev->revision < 0xC2) {
 567                 ppi[0] = &info_20;
 568         } else if (pdev->revision == 0xC2) {
 569                 ppi[0] = &info_c2;
 570         } else if (pdev->revision == 0xC3) {
 571                 ppi[0] = &info_c3;
 572         } else if (pdev->revision == 0xC4) {
 573                 ppi[0] = &info_c4;
 574         } else
 575                 ppi[0] = &info_c5;
 576
 577         ali_init_chipset(pdev);
 578
 579         if (ali_isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
 580                 /* Are we paired with a UDMA capable chip */
 581                 pci_read_config_byte(ali_isa_bridge, 0x5E, &tmp);
 582                 if ((tmp & 0x1E) == 0x12)
 583                         ppi[0] = &info_20_udma;
 584         }
 585
 586         if (!ppi[0]->mwdma_mask && !ppi[0]->udma_mask)
 587                 return ata_pci_sff_init_one(pdev, ppi, &ali_sht, NULL, 0);
 588         else
 589                 return ata_pci_bmdma_init_one(pdev, ppi, &ali_sht, NULL, 0);
 590 }
 591
 592 #ifdef CONFIG_PM
 593 static int ali_reinit_one(struct pci_dev *pdev)
 594 {
 595         struct ata_host *host = pci_get_drvdata(pdev);
 596         int rc;
 597
 598         rc = ata_pci_device_do_resume(pdev);
 599         if (rc)
 600                 return rc;
 601         ali_init_chipset(pdev);
 602         ata_host_resume(host);
 603         return 0;
 604 }
 605 #endif
 606
 607 static const struct pci_device_id ali[] = {
 608         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), },
 609         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), },
 610
 611         { },
 612 };
 613
 614 static struct pci_driver ali_pci_driver = {
 615         .name           = DRV_NAME,
 616         .id_table       = ali,
 617         .probe          = ali_init_one,
 618         .remove         = ata_pci_remove_one,
 619 #ifdef CONFIG_PM
 620         .suspend        = ata_pci_device_suspend,
 621         .resume         = ali_reinit_one,
 622 #endif
 623 };
 624
 625 static int __init ali_init(void)
 626 {
 627         int ret;
 628         ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 629
 630         ret = pci_register_driver(&ali_pci_driver);
 631         if (ret < 0)
 632                 pci_dev_put(ali_isa_bridge);
 633         return ret;
 634 }
 635
 636
 637 static void __exit ali_exit(void)
 638 {
 639         pci_unregister_driver(&ali_pci_driver);
 640         pci_dev_put(ali_isa_bridge);
 641 }
 642
 643
 644 MODULE_AUTHOR("Alan Cox");
 645 MODULE_DESCRIPTION("low-level driver for ALi PATA");
 646 MODULE_LICENSE("GPL");
 647 MODULE_DEVICE_TABLE(pci, ali);
 648 MODULE_VERSION(DRV_VERSION);
 649
 650 module_init(ali_init);
 651 module_exit(ali_exit);