drivers/ata/pata_ali.c

   1 /*
   2  * pata_ali.c   - ALI 15x3 PATA for new ATA layer
   3  *                        (C) 2005 Red Hat Inc
   4  *                        Alan Cox <alan@redhat.com>
   5  *
   6  * based in part upon
   7  * linux/drivers/ide/pci/alim15x3.c             Version 0.17    2003/01/02
   8  *
   9  *  Copyright (C) 1998-2000 Michel Aubry, Maintainer
  10  *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
  11  *  Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
  12  *
  13  *  Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
  14  *  May be copied or modified under the terms of the GNU General Public License
  15  *  Copyright (C) 2002 Alan Cox <alan@redhat.com>
  16  *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
  17  *
  18  *  Documentation
  19  *      Chipset documentation available under NDA only
  20  *
  21  *  TODO/CHECK
  22  *      Cannot have ATAPI on both master & slave for rev < c2 (???) but
  23  *      otherwise should do atapi DMA.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28 #include <linux/pci.h>
  29 #include <linux/init.h>
  30 #include <linux/blkdev.h>
  31 #include <linux/delay.h>
  32 #include <scsi/scsi_host.h>
  33 #include <linux/libata.h>
  34 #include <linux/dmi.h>
  35
  36 #define DRV_NAME "pata_ali"
  37 #define DRV_VERSION "0.7.4"
  38
  39 /*
  40  *      Cable special cases
  41  */
  42
  43 static struct dmi_system_id cable_dmi_table[] = {
  44         {
  45                 .ident = "HP Pavilion N5430",
  46                 .matches = {
  47                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
  48                         DMI_MATCH(DMI_BOARD_NAME, "OmniBook N32N-736"),
  49                 },
  50         },
  51         { }
  52 };
  53
  54 static int ali_cable_override(struct pci_dev *pdev)
  55 {
  56         /* Fujitsu P2000 */
  57         if (pdev->subsystem_vendor == 0x10CF && pdev->subsystem_device == 0x10AF)
  58                 return 1;
  59         /* Systems by DMI */
  60         if (dmi_check_system(cable_dmi_table))
  61                 return 1;
  62         return 0;
  63 }
  64
  65 /**
  66  *      ali_c2_cable_detect     -       cable detection
  67  *      @ap: ATA port
  68  *
  69  *      Perform cable detection for C2 and later revisions
  70  */
  71
  72 static int ali_c2_cable_detect(struct ata_port *ap)
  73 {
  74         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  75         u8 ata66;
  76
  77         /* Certain laptops use short but suitable cables and don't
  78            implement the detect logic */
  79
  80         if (ali_cable_override(pdev))
  81                 return ATA_CBL_PATA40_SHORT;
  82
  83         /* Host view cable detect 0x4A bit 0 primary bit 1 secondary
  84            Bit set for 40 pin */
  85         pci_read_config_byte(pdev, 0x4A, &ata66);
  86         if (ata66 & (1 << ap->port_no))
  87                 return ATA_CBL_PATA40;
  88         else
  89                 return ATA_CBL_PATA80;
  90 }
  91
  92 /**
  93  *      ali_20_filter           -       filter for earlier ALI DMA
  94  *      @ap: ALi ATA port
  95  *      @adev: attached device
  96  *
  97  *      Ensure that we do not do DMA on CD devices. We may be able to
  98  *      fix that later on. Also ensure we do not do UDMA on WDC drives
  99  */
 100
 101 static unsigned long ali_20_filter(struct ata_device *adev, unsigned long mask)
 102 {
 103         char model_num[ATA_ID_PROD_LEN + 1];
 104         /* No DMA on anything but a disk for now */
 105         if (adev->class != ATA_DEV_ATA)
 106                 mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
 107         ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
 108         if (strstr(model_num, "WDC"))
 109                 return mask &= ~ATA_MASK_UDMA;
 110         return ata_pci_default_filter(adev, mask);
 111 }
 112
 113 /**
 114  *      ali_fifo_control        -       FIFO manager
 115  *      @ap: ALi channel to control
 116  *      @adev: device for FIFO control
 117  *      @on: 0 for off 1 for on
 118  *
 119  *      Enable or disable the FIFO on a given device. Because of the way the
 120  *      ALi FIFO works it provides a boost on ATA disk but can be confused by
 121  *      ATAPI and we must therefore manage it.
 122  */
 123
 124 static void ali_fifo_control(struct ata_port *ap, struct ata_device *adev, int on)
 125 {
 126         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 127         int pio_fifo = 0x54 + ap->port_no;
 128         u8 fifo;
 129         int shift = 4 * adev->devno;
 130
 131         /* ATA - FIFO on set nibble to 0x05, ATAPI - FIFO off, set nibble to
 132            0x00. Not all the docs agree but the behaviour we now use is the
 133            one stated in the BIOS Programming Guide */
 134
 135         pci_read_config_byte(pdev, pio_fifo, &fifo);
 136         fifo &= ~(0x0F << shift);
 137         if (on)
 138                 fifo |= (on << shift);
 139         pci_write_config_byte(pdev, pio_fifo, fifo);
 140 }
 141
 142 /**
 143  *      ali_program_modes       -       load mode registers
 144  *      @ap: ALi channel to load
 145  *      @adev: Device the timing is for
 146  *      @cmd: Command timing
 147  *      @data: Data timing
 148  *      @ultra: UDMA timing or zero for off
 149  *
 150  *      Loads the timing registers for cmd/data and disable UDMA if
 151  *      ultra is zero. If ultra is set then load and enable the UDMA
 152  *      timing but do not touch the command/data timing.
 153  */
 154
 155 static void ali_program_modes(struct ata_port *ap, struct ata_device *adev, struct ata_timing *t, u8 ultra)
 156 {
 157         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 158         int cas = 0x58 + 4 * ap->port_no;       /* Command timing */
 159         int cbt = 0x59 + 4 * ap->port_no;       /* Command timing */
 160         int drwt = 0x5A + 4 * ap->port_no + adev->devno; /* R/W timing */
 161         int udmat = 0x56 + ap->port_no; /* UDMA timing */
 162         int shift = 4 * adev->devno;
 163         u8 udma;
 164
 165         if (t != NULL) {
 166                 t->setup = FIT(t->setup, 1, 8) & 7;
 167                 t->act8b = FIT(t->act8b, 1, 8) & 7;
 168                 t->rec8b = FIT(t->rec8b, 1, 16) & 15;
 169                 t->active = FIT(t->active, 1, 8) & 7;
 170                 t->recover = FIT(t->recover, 1, 16) & 15;
 171
 172                 pci_write_config_byte(pdev, cas, t->setup);
 173                 pci_write_config_byte(pdev, cbt, (t->act8b << 4) | t->rec8b);
 174                 pci_write_config_byte(pdev, drwt, (t->active << 4) | t->recover);
 175         }
 176
 177         /* Set up the UDMA enable */
 178         pci_read_config_byte(pdev, udmat, &udma);
 179         udma &= ~(0x0F << shift);
 180         udma |= ultra << shift;
 181         pci_write_config_byte(pdev, udmat, udma);
 182 }
 183
 184 /**
 185  *      ali_set_piomode -       set initial PIO mode data
 186  *      @ap: ATA interface
 187  *      @adev: ATA device
 188  *
 189  *      Program the ALi registers for PIO mode. FIXME: add timings for
 190  *      PIO5.
 191  */
 192
 193 static void ali_set_piomode(struct ata_port *ap, struct ata_device *adev)
 194 {
 195         struct ata_device *pair = ata_dev_pair(adev);
 196         struct ata_timing t;
 197         unsigned long T =  1000000000 / 33333;  /* PCI clock based */
 198
 199         ata_timing_compute(adev, adev->pio_mode, &t, T, 1);
 200         if (pair) {
 201                 struct ata_timing p;
 202                 ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
 203                 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 204                 if (pair->dma_mode) {
 205                         ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
 206                         ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 207                 }
 208         }
 209
 210         /* PIO FIFO is only permitted on ATA disk */
 211         if (adev->class != ATA_DEV_ATA)
 212                 ali_fifo_control(ap, adev, 0x00);
 213         ali_program_modes(ap, adev, &t, 0);
 214         if (adev->class == ATA_DEV_ATA)
 215                 ali_fifo_control(ap, adev, 0x05);
 216
 217 }
 218
 219 /**
 220  *      ali_set_dmamode -       set initial DMA mode data
 221  *      @ap: ATA interface
 222  *      @adev: ATA device
 223  *
 224  *      FIXME: MWDMA timings
 225  */
 226
 227 static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 228 {
 229         static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
 230         struct ata_device *pair = ata_dev_pair(adev);
 231         struct ata_timing t;
 232         unsigned long T =  1000000000 / 33333;  /* PCI clock based */
 233         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 234
 235
 236         if (adev->class == ATA_DEV_ATA)
 237                 ali_fifo_control(ap, adev, 0x08);
 238
 239         if (adev->dma_mode >= XFER_UDMA_0) {
 240                 ali_program_modes(ap, adev, NULL, udma_timing[adev->dma_mode - XFER_UDMA_0]);
 241                 if (adev->dma_mode >= XFER_UDMA_3) {
 242                         u8 reg4b;
 243                         pci_read_config_byte(pdev, 0x4B, &reg4b);
 244                         reg4b |= 1;
 245                         pci_write_config_byte(pdev, 0x4B, reg4b);
 246                 }
 247         } else {
 248                 ata_timing_compute(adev, adev->dma_mode, &t, T, 1);
 249                 if (pair) {
 250                         struct ata_timing p;
 251                         ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
 252                         ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 253                         if (pair->dma_mode) {
 254                                 ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
 255                                 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 256                         }
 257                 }
 258                 ali_program_modes(ap, adev, &t, 0);
 259         }
 260 }
 261
 262 /**
 263  *      ali_lock_sectors        -       Keep older devices to 255 sector mode
 264  *      @adev: Device
 265  *
 266  *      Called during the bus probe for each device that is found. We use
 267  *      this call to lock the sector count of the device to 255 or less on
 268  *      older ALi controllers. If we didn't do this then large I/O's would
 269  *      require LBA48 commands which the older ALi requires are issued by
 270  *      slower PIO methods
 271  */
 272
 273 static void ali_lock_sectors(struct ata_device *adev)
 274 {
 275         adev->max_sectors = 255;
 276 }
 277
 278 static struct scsi_host_template ali_sht = {
 279         .module                 = THIS_MODULE,
 280         .name                   = DRV_NAME,
 281         .ioctl                  = ata_scsi_ioctl,
 282         .queuecommand           = ata_scsi_queuecmd,
 283         .can_queue              = ATA_DEF_QUEUE,
 284         .this_id                = ATA_SHT_THIS_ID,
 285         .sg_tablesize           = LIBATA_MAX_PRD,
 286         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 287         .emulated               = ATA_SHT_EMULATED,
 288         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 289         .proc_name              = DRV_NAME,
 290         .dma_boundary           = ATA_DMA_BOUNDARY,
 291         .slave_configure        = ata_scsi_slave_config,
 292         .slave_destroy          = ata_scsi_slave_destroy,
 293         .bios_param             = ata_std_bios_param,
 294 };
 295
 296 /*
 297  *      Port operations for PIO only ALi
 298  */
 299
 300 static struct ata_port_operations ali_early_port_ops = {
 301         .port_disable   = ata_port_disable,
 302         .set_piomode    = ali_set_piomode,
 303         .tf_load        = ata_tf_load,
 304         .tf_read        = ata_tf_read,
 305         .check_status   = ata_check_status,
 306         .exec_command   = ata_exec_command,
 307         .dev_select     = ata_std_dev_select,
 308
 309         .freeze         = ata_bmdma_freeze,
 310         .thaw           = ata_bmdma_thaw,
 311         .error_handler  = ata_bmdma_error_handler,
 312         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 313         .cable_detect   = ata_cable_40wire,
 314
 315         .qc_prep        = ata_qc_prep,
 316         .qc_issue       = ata_qc_issue_prot,
 317
 318         .data_xfer      = ata_data_xfer,
 319
 320         .irq_handler    = ata_interrupt,
 321         .irq_clear      = ata_bmdma_irq_clear,
 322         .irq_on         = ata_irq_on,
 323         .irq_ack        = ata_irq_ack,
 324
 325         .port_start     = ata_port_start,
 326 };
 327
 328 /*
 329  *      Port operations for DMA capable ALi without cable
 330  *      detect
 331  */
 332 static struct ata_port_operations ali_20_port_ops = {
 333         .port_disable   = ata_port_disable,
 334
 335         .set_piomode    = ali_set_piomode,
 336         .set_dmamode    = ali_set_dmamode,
 337         .mode_filter    = ali_20_filter,
 338
 339         .tf_load        = ata_tf_load,
 340         .tf_read        = ata_tf_read,
 341         .check_status   = ata_check_status,
 342         .exec_command   = ata_exec_command,
 343         .dev_select     = ata_std_dev_select,
 344         .dev_config     = ali_lock_sectors,
 345
 346         .freeze         = ata_bmdma_freeze,
 347         .thaw           = ata_bmdma_thaw,
 348         .error_handler  = ata_bmdma_error_handler,
 349         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 350         .cable_detect   = ata_cable_40wire,
 351
 352         .bmdma_setup    = ata_bmdma_setup,
 353         .bmdma_start    = ata_bmdma_start,
 354         .bmdma_stop     = ata_bmdma_stop,
 355         .bmdma_status   = ata_bmdma_status,
 356
 357         .qc_prep        = ata_qc_prep,
 358         .qc_issue       = ata_qc_issue_prot,
 359
 360         .data_xfer      = ata_data_xfer,
 361
 362         .irq_handler    = ata_interrupt,
 363         .irq_clear      = ata_bmdma_irq_clear,
 364         .irq_on         = ata_irq_on,
 365         .irq_ack        = ata_irq_ack,
 366
 367         .port_start     = ata_port_start,
 368 };
 369
 370 /*
 371  *      Port operations for DMA capable ALi with cable detect
 372  */
 373 static struct ata_port_operations ali_c2_port_ops = {
 374         .port_disable   = ata_port_disable,
 375         .set_piomode    = ali_set_piomode,
 376         .set_dmamode    = ali_set_dmamode,
 377         .mode_filter    = ata_pci_default_filter,
 378         .tf_load        = ata_tf_load,
 379         .tf_read        = ata_tf_read,
 380         .check_status   = ata_check_status,
 381         .exec_command   = ata_exec_command,
 382         .dev_select     = ata_std_dev_select,
 383         .dev_config     = ali_lock_sectors,
 384
 385         .freeze         = ata_bmdma_freeze,
 386         .thaw           = ata_bmdma_thaw,
 387         .error_handler  = ata_bmdma_error_handler,
 388         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 389         .cable_detect   = ali_c2_cable_detect,
 390
 391         .bmdma_setup    = ata_bmdma_setup,
 392         .bmdma_start    = ata_bmdma_start,
 393         .bmdma_stop     = ata_bmdma_stop,
 394         .bmdma_status   = ata_bmdma_status,
 395
 396         .qc_prep        = ata_qc_prep,
 397         .qc_issue       = ata_qc_issue_prot,
 398
 399         .data_xfer      = ata_data_xfer,
 400
 401         .irq_handler    = ata_interrupt,
 402         .irq_clear      = ata_bmdma_irq_clear,
 403         .irq_on         = ata_irq_on,
 404         .irq_ack        = ata_irq_ack,
 405
 406         .port_start     = ata_port_start,
 407 };
 408
 409 /*
 410  *      Port operations for DMA capable ALi with cable detect and LBA48
 411  */
 412 static struct ata_port_operations ali_c5_port_ops = {
 413         .port_disable   = ata_port_disable,
 414         .set_piomode    = ali_set_piomode,
 415         .set_dmamode    = ali_set_dmamode,
 416         .mode_filter    = ata_pci_default_filter,
 417         .tf_load        = ata_tf_load,
 418         .tf_read        = ata_tf_read,
 419         .check_status   = ata_check_status,
 420         .exec_command   = ata_exec_command,
 421         .dev_select     = ata_std_dev_select,
 422
 423         .freeze         = ata_bmdma_freeze,
 424         .thaw           = ata_bmdma_thaw,
 425         .error_handler  = ata_bmdma_error_handler,
 426         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 427         .cable_detect   = ali_c2_cable_detect,
 428
 429         .bmdma_setup    = ata_bmdma_setup,
 430         .bmdma_start    = ata_bmdma_start,
 431         .bmdma_stop     = ata_bmdma_stop,
 432         .bmdma_status   = ata_bmdma_status,
 433
 434         .qc_prep        = ata_qc_prep,
 435         .qc_issue       = ata_qc_issue_prot,
 436
 437         .data_xfer      = ata_data_xfer,
 438
 439         .irq_handler    = ata_interrupt,
 440         .irq_clear      = ata_bmdma_irq_clear,
 441         .irq_on         = ata_irq_on,
 442         .irq_ack        = ata_irq_ack,
 443
 444         .port_start     = ata_port_start,
 445 };
 446
 447
 448 /**
 449  *      ali_init_chipset        -       chip setup function
 450  *      @pdev: PCI device of ATA controller
 451  *
 452  *      Perform the setup on the device that must be done both at boot
 453  *      and at resume time.
 454  */
 455
 456 static void ali_init_chipset(struct pci_dev *pdev)
 457 {
 458         u8 tmp;
 459         struct pci_dev *north, *isa_bridge;
 460
 461         /*
 462          * The chipset revision selects the driver operations and
 463          * mode data.
 464          */
 465
 466         if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
 467                 /* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
 468                 pci_read_config_byte(pdev, 0x4B, &tmp);
 469                 /* Clear CD-ROM DMA write bit */
 470                 tmp &= 0x7F;
 471                 pci_write_config_byte(pdev, 0x4B, tmp);
 472         } else if (pdev->revision >= 0xC2) {
 473                 /* Enable cable detection logic */
 474                 pci_read_config_byte(pdev, 0x4B, &tmp);
 475                 pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
 476         }
 477         north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 478         isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 479
 480         if (north && north->vendor == PCI_VENDOR_ID_AL && isa_bridge) {
 481                 /* Configure the ALi bridge logic. For non ALi rely on BIOS.
 482                    Set the south bridge enable bit */
 483                 pci_read_config_byte(isa_bridge, 0x79, &tmp);
 484                 if (pdev->revision == 0xC2)
 485                         pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04);
 486                 else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
 487                         pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
 488         }
 489         if (pdev->revision >= 0x20) {
 490                 /*
 491                  * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
 492                  * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
 493                  * via 0x54/55.
 494                  */
 495                 pci_read_config_byte(pdev, 0x53, &tmp);
 496                 if (pdev->revision <= 0x20)
 497                         tmp &= ~0x02;
 498                 if (pdev->revision >= 0xc7)
 499                         tmp |= 0x03;
 500                 else
 501                         tmp |= 0x01;    /* CD_ROM enable for DMA */
 502                 pci_write_config_byte(pdev, 0x53, tmp);
 503         }
 504         pci_dev_put(isa_bridge);
 505         pci_dev_put(north);
 506         ata_pci_clear_simplex(pdev);
 507 }
 508 /**
 509  *      ali_init_one            -       discovery callback
 510  *      @pdev: PCI device ID
 511  *      @id: PCI table info
 512  *
 513  *      An ALi IDE interface has been discovered. Figure out what revision
 514  *      and perform configuration work before handing it to the ATA layer
 515  */
 516
 517 static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 518 {
 519         static const struct ata_port_info info_early = {
 520                 .sht = &ali_sht,
 521                 .flags = ATA_FLAG_SLAVE_POSS,
 522                 .pio_mask = 0x1f,
 523                 .port_ops = &ali_early_port_ops
 524         };
 525         /* Revision 0x20 added DMA */
 526         static const struct ata_port_info info_20 = {
 527                 .sht = &ali_sht,
 528                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 529                 .pio_mask = 0x1f,
 530                 .mwdma_mask = 0x07,
 531                 .port_ops = &ali_20_port_ops
 532         };
 533         /* Revision 0x20 with support logic added UDMA */
 534         static const struct ata_port_info info_20_udma = {
 535                 .sht = &ali_sht,
 536                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 537                 .pio_mask = 0x1f,
 538                 .mwdma_mask = 0x07,
 539                 .udma_mask = 0x07,      /* UDMA33 */
 540                 .port_ops = &ali_20_port_ops
 541         };
 542         /* Revision 0xC2 adds UDMA66 */
 543         static const struct ata_port_info info_c2 = {
 544                 .sht = &ali_sht,
 545                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 546                 .pio_mask = 0x1f,
 547                 .mwdma_mask = 0x07,
 548                 .udma_mask = ATA_UDMA4,
 549                 .port_ops = &ali_c2_port_ops
 550         };
 551         /* Revision 0xC3 is UDMA66 for now */
 552         static const struct ata_port_info info_c3 = {
 553                 .sht = &ali_sht,
 554                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 555                 .pio_mask = 0x1f,
 556                 .mwdma_mask = 0x07,
 557                 .udma_mask = ATA_UDMA4,
 558                 .port_ops = &ali_c2_port_ops
 559         };
 560         /* Revision 0xC4 is UDMA100 */
 561         static const struct ata_port_info info_c4 = {
 562                 .sht = &ali_sht,
 563                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 564                 .pio_mask = 0x1f,
 565                 .mwdma_mask = 0x07,
 566                 .udma_mask = ATA_UDMA5,
 567                 .port_ops = &ali_c2_port_ops
 568         };
 569         /* Revision 0xC5 is UDMA133 with LBA48 DMA */
 570         static const struct ata_port_info info_c5 = {
 571                 .sht = &ali_sht,
 572                 .flags = ATA_FLAG_SLAVE_POSS,
 573                 .pio_mask = 0x1f,
 574                 .mwdma_mask = 0x07,
 575                 .udma_mask = ATA_UDMA6,
 576                 .port_ops = &ali_c5_port_ops
 577         };
 578
 579         const struct ata_port_info *ppi[] = { NULL, NULL };
 580         u8 tmp;
 581         struct pci_dev *isa_bridge;
 582
 583         /*
 584          * The chipset revision selects the driver operations and
 585          * mode data.
 586          */
 587
 588         if (pdev->revision < 0x20) {
 589                 ppi[0] = &info_early;
 590         } else if (pdev->revision < 0xC2) {
 591                 ppi[0] = &info_20;
 592         } else if (pdev->revision == 0xC2) {
 593                 ppi[0] = &info_c2;
 594         } else if (pdev->revision == 0xC3) {
 595                 ppi[0] = &info_c3;
 596         } else if (pdev->revision == 0xC4) {
 597                 ppi[0] = &info_c4;
 598         } else
 599                 ppi[0] = &info_c5;
 600
 601         ali_init_chipset(pdev);
 602
 603         isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 604         if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
 605                 /* Are we paired with a UDMA capable chip */
 606                 pci_read_config_byte(isa_bridge, 0x5E, &tmp);
 607                 if ((tmp & 0x1E) == 0x12)
 608                         ppi[0] = &info_20_udma;
 609                 pci_dev_put(isa_bridge);
 610         }
 611         return ata_pci_init_one(pdev, ppi);
 612 }
 613
 614 #ifdef CONFIG_PM
 615 static int ali_reinit_one(struct pci_dev *pdev)
 616 {
 617         ali_init_chipset(pdev);
 618         return ata_pci_device_resume(pdev);
 619 }
 620 #endif
 621
 622 static const struct pci_device_id ali[] = {
 623         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), },
 624         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), },
 625
 626         { },
 627 };
 628
 629 static struct pci_driver ali_pci_driver = {
 630         .name           = DRV_NAME,
 631         .id_table       = ali,
 632         .probe          = ali_init_one,
 633         .remove         = ata_pci_remove_one,
 634 #ifdef CONFIG_PM
 635         .suspend        = ata_pci_device_suspend,
 636         .resume         = ali_reinit_one,
 637 #endif
 638 };
 639
 640 static int __init ali_init(void)
 641 {
 642         return pci_register_driver(&ali_pci_driver);
 643 }
 644
 645
 646 static void __exit ali_exit(void)
 647 {
 648         pci_unregister_driver(&ali_pci_driver);
 649 }
 650
 651
 652 MODULE_AUTHOR("Alan Cox");
 653 MODULE_DESCRIPTION("low-level driver for ALi PATA");
 654 MODULE_LICENSE("GPL");
 655 MODULE_DEVICE_TABLE(pci, ali);
 656 MODULE_VERSION(DRV_VERSION);
 657
 658 module_init(ali_init);
 659 module_exit(ali_exit);