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 "0.7.5"
  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_VERSION, "OmniBook N32N-736"),
  49                 },
  50         },
  51         {
  52                 .ident = "Toshiba Satelite S1800-814",
  53                 .matches = {
  54                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
  55                         DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
  56                 },
  57         },
  58         { }
  59 };
  60
  61 static int ali_cable_override(struct pci_dev *pdev)
  62 {
  63         /* Fujitsu P2000 */
  64         if (pdev->subsystem_vendor == 0x10CF && pdev->subsystem_device == 0x10AF)
  65                 return 1;
  66         /* Systems by DMI */
  67         if (dmi_check_system(cable_dmi_table))
  68                 return 1;
  69         return 0;
  70 }
  71
  72 /**
  73  *      ali_c2_cable_detect     -       cable detection
  74  *      @ap: ATA port
  75  *
  76  *      Perform cable detection for C2 and later revisions
  77  */
  78
  79 static int ali_c2_cable_detect(struct ata_port *ap)
  80 {
  81         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  82         u8 ata66;
  83
  84         /* Certain laptops use short but suitable cables and don't
  85            implement the detect logic */
  86
  87         if (ali_cable_override(pdev))
  88                 return ATA_CBL_PATA40_SHORT;
  89
  90         /* Host view cable detect 0x4A bit 0 primary bit 1 secondary
  91            Bit set for 40 pin */
  92         pci_read_config_byte(pdev, 0x4A, &ata66);
  93         if (ata66 & (1 << ap->port_no))
  94                 return ATA_CBL_PATA40;
  95         else
  96                 return ATA_CBL_PATA80;
  97 }
  98
  99 /**
 100  *      ali_20_filter           -       filter for earlier ALI DMA
 101  *      @ap: ALi ATA port
 102  *      @adev: attached device
 103  *
 104  *      Ensure that we do not do DMA on CD devices. We may be able to
 105  *      fix that later on. Also ensure we do not do UDMA on WDC drives
 106  */
 107
 108 static unsigned long ali_20_filter(struct ata_device *adev, unsigned long mask)
 109 {
 110         char model_num[ATA_ID_PROD_LEN + 1];
 111         /* No DMA on anything but a disk for now */
 112         if (adev->class != ATA_DEV_ATA)
 113                 mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
 114         ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
 115         if (strstr(model_num, "WDC"))
 116                 return mask &= ~ATA_MASK_UDMA;
 117         return ata_pci_default_filter(adev, mask);
 118 }
 119
 120 /**
 121  *      ali_fifo_control        -       FIFO manager
 122  *      @ap: ALi channel to control
 123  *      @adev: device for FIFO control
 124  *      @on: 0 for off 1 for on
 125  *
 126  *      Enable or disable the FIFO on a given device. Because of the way the
 127  *      ALi FIFO works it provides a boost on ATA disk but can be confused by
 128  *      ATAPI and we must therefore manage it.
 129  */
 130
 131 static void ali_fifo_control(struct ata_port *ap, struct ata_device *adev, int on)
 132 {
 133         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 134         int pio_fifo = 0x54 + ap->port_no;
 135         u8 fifo;
 136         int shift = 4 * adev->devno;
 137
 138         /* ATA - FIFO on set nibble to 0x05, ATAPI - FIFO off, set nibble to
 139            0x00. Not all the docs agree but the behaviour we now use is the
 140            one stated in the BIOS Programming Guide */
 141
 142         pci_read_config_byte(pdev, pio_fifo, &fifo);
 143         fifo &= ~(0x0F << shift);
 144         if (on)
 145                 fifo |= (on << shift);
 146         pci_write_config_byte(pdev, pio_fifo, fifo);
 147 }
 148
 149 /**
 150  *      ali_program_modes       -       load mode registers
 151  *      @ap: ALi channel to load
 152  *      @adev: Device the timing is for
 153  *      @cmd: Command timing
 154  *      @data: Data timing
 155  *      @ultra: UDMA timing or zero for off
 156  *
 157  *      Loads the timing registers for cmd/data and disable UDMA if
 158  *      ultra is zero. If ultra is set then load and enable the UDMA
 159  *      timing but do not touch the command/data timing.
 160  */
 161
 162 static void ali_program_modes(struct ata_port *ap, struct ata_device *adev, struct ata_timing *t, u8 ultra)
 163 {
 164         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 165         int cas = 0x58 + 4 * ap->port_no;       /* Command timing */
 166         int cbt = 0x59 + 4 * ap->port_no;       /* Command timing */
 167         int drwt = 0x5A + 4 * ap->port_no + adev->devno; /* R/W timing */
 168         int udmat = 0x56 + ap->port_no; /* UDMA timing */
 169         int shift = 4 * adev->devno;
 170         u8 udma;
 171
 172         if (t != NULL) {
 173                 t->setup = FIT(t->setup, 1, 8) & 7;
 174                 t->act8b = FIT(t->act8b, 1, 8) & 7;
 175                 t->rec8b = FIT(t->rec8b, 1, 16) & 15;
 176                 t->active = FIT(t->active, 1, 8) & 7;
 177                 t->recover = FIT(t->recover, 1, 16) & 15;
 178
 179                 pci_write_config_byte(pdev, cas, t->setup);
 180                 pci_write_config_byte(pdev, cbt, (t->act8b << 4) | t->rec8b);
 181                 pci_write_config_byte(pdev, drwt, (t->active << 4) | t->recover);
 182         }
 183
 184         /* Set up the UDMA enable */
 185         pci_read_config_byte(pdev, udmat, &udma);
 186         udma &= ~(0x0F << shift);
 187         udma |= ultra << shift;
 188         pci_write_config_byte(pdev, udmat, udma);
 189 }
 190
 191 /**
 192  *      ali_set_piomode -       set initial PIO mode data
 193  *      @ap: ATA interface
 194  *      @adev: ATA device
 195  *
 196  *      Program the ALi registers for PIO mode. FIXME: add timings for
 197  *      PIO5.
 198  */
 199
 200 static void ali_set_piomode(struct ata_port *ap, struct ata_device *adev)
 201 {
 202         struct ata_device *pair = ata_dev_pair(adev);
 203         struct ata_timing t;
 204         unsigned long T =  1000000000 / 33333;  /* PCI clock based */
 205
 206         ata_timing_compute(adev, adev->pio_mode, &t, T, 1);
 207         if (pair) {
 208                 struct ata_timing p;
 209                 ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
 210                 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 211                 if (pair->dma_mode) {
 212                         ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
 213                         ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 214                 }
 215         }
 216
 217         /* PIO FIFO is only permitted on ATA disk */
 218         if (adev->class != ATA_DEV_ATA)
 219                 ali_fifo_control(ap, adev, 0x00);
 220         ali_program_modes(ap, adev, &t, 0);
 221         if (adev->class == ATA_DEV_ATA)
 222                 ali_fifo_control(ap, adev, 0x05);
 223
 224 }
 225
 226 /**
 227  *      ali_set_dmamode -       set initial DMA mode data
 228  *      @ap: ATA interface
 229  *      @adev: ATA device
 230  *
 231  *      FIXME: MWDMA timings
 232  */
 233
 234 static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 235 {
 236         static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
 237         struct ata_device *pair = ata_dev_pair(adev);
 238         struct ata_timing t;
 239         unsigned long T =  1000000000 / 33333;  /* PCI clock based */
 240         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 241
 242
 243         if (adev->class == ATA_DEV_ATA)
 244                 ali_fifo_control(ap, adev, 0x08);
 245
 246         if (adev->dma_mode >= XFER_UDMA_0) {
 247                 ali_program_modes(ap, adev, NULL, udma_timing[adev->dma_mode - XFER_UDMA_0]);
 248                 if (adev->dma_mode >= XFER_UDMA_3) {
 249                         u8 reg4b;
 250                         pci_read_config_byte(pdev, 0x4B, &reg4b);
 251                         reg4b |= 1;
 252                         pci_write_config_byte(pdev, 0x4B, reg4b);
 253                 }
 254         } else {
 255                 ata_timing_compute(adev, adev->dma_mode, &t, T, 1);
 256                 if (pair) {
 257                         struct ata_timing p;
 258                         ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
 259                         ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 260                         if (pair->dma_mode) {
 261                                 ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
 262                                 ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
 263                         }
 264                 }
 265                 ali_program_modes(ap, adev, &t, 0);
 266         }
 267 }
 268
 269 /**
 270  *      ali_lock_sectors        -       Keep older devices to 255 sector mode
 271  *      @adev: Device
 272  *
 273  *      Called during the bus probe for each device that is found. We use
 274  *      this call to lock the sector count of the device to 255 or less on
 275  *      older ALi controllers. If we didn't do this then large I/O's would
 276  *      require LBA48 commands which the older ALi requires are issued by
 277  *      slower PIO methods
 278  */
 279
 280 static void ali_lock_sectors(struct ata_device *adev)
 281 {
 282         adev->max_sectors = 255;
 283 }
 284
 285 static struct scsi_host_template ali_sht = {
 286         .module                 = THIS_MODULE,
 287         .name                   = DRV_NAME,
 288         .ioctl                  = ata_scsi_ioctl,
 289         .queuecommand           = ata_scsi_queuecmd,
 290         .can_queue              = ATA_DEF_QUEUE,
 291         .this_id                = ATA_SHT_THIS_ID,
 292         .sg_tablesize           = LIBATA_MAX_PRD,
 293         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 294         .emulated               = ATA_SHT_EMULATED,
 295         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 296         .proc_name              = DRV_NAME,
 297         .dma_boundary           = ATA_DMA_BOUNDARY,
 298         .slave_configure        = ata_scsi_slave_config,
 299         .slave_destroy          = ata_scsi_slave_destroy,
 300         .bios_param             = ata_std_bios_param,
 301 };
 302
 303 /*
 304  *      Port operations for PIO only ALi
 305  */
 306
 307 static struct ata_port_operations ali_early_port_ops = {
 308         .port_disable   = ata_port_disable,
 309         .set_piomode    = ali_set_piomode,
 310         .tf_load        = ata_tf_load,
 311         .tf_read        = ata_tf_read,
 312         .check_status   = ata_check_status,
 313         .exec_command   = ata_exec_command,
 314         .dev_select     = ata_std_dev_select,
 315
 316         .freeze         = ata_bmdma_freeze,
 317         .thaw           = ata_bmdma_thaw,
 318         .error_handler  = ata_bmdma_error_handler,
 319         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 320         .cable_detect   = ata_cable_40wire,
 321
 322         .qc_prep        = ata_qc_prep,
 323         .qc_issue       = ata_qc_issue_prot,
 324
 325         .data_xfer      = ata_data_xfer,
 326
 327         .irq_handler    = ata_interrupt,
 328         .irq_clear      = ata_bmdma_irq_clear,
 329         .irq_on         = ata_irq_on,
 330         .irq_ack        = ata_irq_ack,
 331
 332         .port_start     = ata_port_start,
 333 };
 334
 335 /*
 336  *      Port operations for DMA capable ALi without cable
 337  *      detect
 338  */
 339 static struct ata_port_operations ali_20_port_ops = {
 340         .port_disable   = ata_port_disable,
 341
 342         .set_piomode    = ali_set_piomode,
 343         .set_dmamode    = ali_set_dmamode,
 344         .mode_filter    = ali_20_filter,
 345
 346         .tf_load        = ata_tf_load,
 347         .tf_read        = ata_tf_read,
 348         .check_status   = ata_check_status,
 349         .exec_command   = ata_exec_command,
 350         .dev_select     = ata_std_dev_select,
 351         .dev_config     = ali_lock_sectors,
 352
 353         .freeze         = ata_bmdma_freeze,
 354         .thaw           = ata_bmdma_thaw,
 355         .error_handler  = ata_bmdma_error_handler,
 356         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 357         .cable_detect   = ata_cable_40wire,
 358
 359         .bmdma_setup    = ata_bmdma_setup,
 360         .bmdma_start    = ata_bmdma_start,
 361         .bmdma_stop     = ata_bmdma_stop,
 362         .bmdma_status   = ata_bmdma_status,
 363
 364         .qc_prep        = ata_qc_prep,
 365         .qc_issue       = ata_qc_issue_prot,
 366
 367         .data_xfer      = ata_data_xfer,
 368
 369         .irq_handler    = ata_interrupt,
 370         .irq_clear      = ata_bmdma_irq_clear,
 371         .irq_on         = ata_irq_on,
 372         .irq_ack        = ata_irq_ack,
 373
 374         .port_start     = ata_port_start,
 375 };
 376
 377 /*
 378  *      Port operations for DMA capable ALi with cable detect
 379  */
 380 static struct ata_port_operations ali_c2_port_ops = {
 381         .port_disable   = ata_port_disable,
 382         .set_piomode    = ali_set_piomode,
 383         .set_dmamode    = ali_set_dmamode,
 384         .mode_filter    = ata_pci_default_filter,
 385         .tf_load        = ata_tf_load,
 386         .tf_read        = ata_tf_read,
 387         .check_status   = ata_check_status,
 388         .exec_command   = ata_exec_command,
 389         .dev_select     = ata_std_dev_select,
 390         .dev_config     = ali_lock_sectors,
 391
 392         .freeze         = ata_bmdma_freeze,
 393         .thaw           = ata_bmdma_thaw,
 394         .error_handler  = ata_bmdma_error_handler,
 395         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 396         .cable_detect   = ali_c2_cable_detect,
 397
 398         .bmdma_setup    = ata_bmdma_setup,
 399         .bmdma_start    = ata_bmdma_start,
 400         .bmdma_stop     = ata_bmdma_stop,
 401         .bmdma_status   = ata_bmdma_status,
 402
 403         .qc_prep        = ata_qc_prep,
 404         .qc_issue       = ata_qc_issue_prot,
 405
 406         .data_xfer      = ata_data_xfer,
 407
 408         .irq_handler    = ata_interrupt,
 409         .irq_clear      = ata_bmdma_irq_clear,
 410         .irq_on         = ata_irq_on,
 411         .irq_ack        = ata_irq_ack,
 412
 413         .port_start     = ata_port_start,
 414 };
 415
 416 /*
 417  *      Port operations for DMA capable ALi with cable detect and LBA48
 418  */
 419 static struct ata_port_operations ali_c5_port_ops = {
 420         .port_disable   = ata_port_disable,
 421         .set_piomode    = ali_set_piomode,
 422         .set_dmamode    = ali_set_dmamode,
 423         .mode_filter    = ata_pci_default_filter,
 424         .tf_load        = ata_tf_load,
 425         .tf_read        = ata_tf_read,
 426         .check_status   = ata_check_status,
 427         .exec_command   = ata_exec_command,
 428         .dev_select     = ata_std_dev_select,
 429
 430         .freeze         = ata_bmdma_freeze,
 431         .thaw           = ata_bmdma_thaw,
 432         .error_handler  = ata_bmdma_error_handler,
 433         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 434         .cable_detect   = ali_c2_cable_detect,
 435
 436         .bmdma_setup    = ata_bmdma_setup,
 437         .bmdma_start    = ata_bmdma_start,
 438         .bmdma_stop     = ata_bmdma_stop,
 439         .bmdma_status   = ata_bmdma_status,
 440
 441         .qc_prep        = ata_qc_prep,
 442         .qc_issue       = ata_qc_issue_prot,
 443
 444         .data_xfer      = ata_data_xfer,
 445
 446         .irq_handler    = ata_interrupt,
 447         .irq_clear      = ata_bmdma_irq_clear,
 448         .irq_on         = ata_irq_on,
 449         .irq_ack        = ata_irq_ack,
 450
 451         .port_start     = ata_port_start,
 452 };
 453
 454
 455 /**
 456  *      ali_init_chipset        -       chip setup function
 457  *      @pdev: PCI device of ATA controller
 458  *
 459  *      Perform the setup on the device that must be done both at boot
 460  *      and at resume time.
 461  */
 462
 463 static void ali_init_chipset(struct pci_dev *pdev)
 464 {
 465         u8 tmp;
 466         struct pci_dev *north, *isa_bridge;
 467
 468         /*
 469          * The chipset revision selects the driver operations and
 470          * mode data.
 471          */
 472
 473         if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
 474                 /* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
 475                 pci_read_config_byte(pdev, 0x4B, &tmp);
 476                 /* Clear CD-ROM DMA write bit */
 477                 tmp &= 0x7F;
 478                 pci_write_config_byte(pdev, 0x4B, tmp);
 479         } else if (pdev->revision >= 0xC2) {
 480                 /* Enable cable detection logic */
 481                 pci_read_config_byte(pdev, 0x4B, &tmp);
 482                 pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
 483         }
 484         north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 485         isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 486
 487         if (north && north->vendor == PCI_VENDOR_ID_AL && isa_bridge) {
 488                 /* Configure the ALi bridge logic. For non ALi rely on BIOS.
 489                    Set the south bridge enable bit */
 490                 pci_read_config_byte(isa_bridge, 0x79, &tmp);
 491                 if (pdev->revision == 0xC2)
 492                         pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04);
 493                 else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
 494                         pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
 495         }
 496         if (pdev->revision >= 0x20) {
 497                 /*
 498                  * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
 499                  * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
 500                  * via 0x54/55.
 501                  */
 502                 pci_read_config_byte(pdev, 0x53, &tmp);
 503                 if (pdev->revision <= 0x20)
 504                         tmp &= ~0x02;
 505                 if (pdev->revision >= 0xc7)
 506                         tmp |= 0x03;
 507                 else
 508                         tmp |= 0x01;    /* CD_ROM enable for DMA */
 509                 pci_write_config_byte(pdev, 0x53, tmp);
 510         }
 511         pci_dev_put(isa_bridge);
 512         pci_dev_put(north);
 513         ata_pci_clear_simplex(pdev);
 514 }
 515 /**
 516  *      ali_init_one            -       discovery callback
 517  *      @pdev: PCI device ID
 518  *      @id: PCI table info
 519  *
 520  *      An ALi IDE interface has been discovered. Figure out what revision
 521  *      and perform configuration work before handing it to the ATA layer
 522  */
 523
 524 static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 525 {
 526         static const struct ata_port_info info_early = {
 527                 .sht = &ali_sht,
 528                 .flags = ATA_FLAG_SLAVE_POSS,
 529                 .pio_mask = 0x1f,
 530                 .port_ops = &ali_early_port_ops
 531         };
 532         /* Revision 0x20 added DMA */
 533         static const struct ata_port_info info_20 = {
 534                 .sht = &ali_sht,
 535                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 536                 .pio_mask = 0x1f,
 537                 .mwdma_mask = 0x07,
 538                 .port_ops = &ali_20_port_ops
 539         };
 540         /* Revision 0x20 with support logic added UDMA */
 541         static const struct ata_port_info info_20_udma = {
 542                 .sht = &ali_sht,
 543                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 544                 .pio_mask = 0x1f,
 545                 .mwdma_mask = 0x07,
 546                 .udma_mask = 0x07,      /* UDMA33 */
 547                 .port_ops = &ali_20_port_ops
 548         };
 549         /* Revision 0xC2 adds UDMA66 */
 550         static const struct ata_port_info info_c2 = {
 551                 .sht = &ali_sht,
 552                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 553                 .pio_mask = 0x1f,
 554                 .mwdma_mask = 0x07,
 555                 .udma_mask = ATA_UDMA4,
 556                 .port_ops = &ali_c2_port_ops
 557         };
 558         /* Revision 0xC3 is UDMA66 for now */
 559         static const struct ata_port_info info_c3 = {
 560                 .sht = &ali_sht,
 561                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 562                 .pio_mask = 0x1f,
 563                 .mwdma_mask = 0x07,
 564                 .udma_mask = ATA_UDMA4,
 565                 .port_ops = &ali_c2_port_ops
 566         };
 567         /* Revision 0xC4 is UDMA100 */
 568         static const struct ata_port_info info_c4 = {
 569                 .sht = &ali_sht,
 570                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
 571                 .pio_mask = 0x1f,
 572                 .mwdma_mask = 0x07,
 573                 .udma_mask = ATA_UDMA5,
 574                 .port_ops = &ali_c2_port_ops
 575         };
 576         /* Revision 0xC5 is UDMA133 with LBA48 DMA */
 577         static const struct ata_port_info info_c5 = {
 578                 .sht = &ali_sht,
 579                 .flags = ATA_FLAG_SLAVE_POSS,
 580                 .pio_mask = 0x1f,
 581                 .mwdma_mask = 0x07,
 582                 .udma_mask = ATA_UDMA6,
 583                 .port_ops = &ali_c5_port_ops
 584         };
 585
 586         const struct ata_port_info *ppi[] = { NULL, NULL };
 587         u8 tmp;
 588         struct pci_dev *isa_bridge;
 589
 590         /*
 591          * The chipset revision selects the driver operations and
 592          * mode data.
 593          */
 594
 595         if (pdev->revision < 0x20) {
 596                 ppi[0] = &info_early;
 597         } else if (pdev->revision < 0xC2) {
 598                 ppi[0] = &info_20;
 599         } else if (pdev->revision == 0xC2) {
 600                 ppi[0] = &info_c2;
 601         } else if (pdev->revision == 0xC3) {
 602                 ppi[0] = &info_c3;
 603         } else if (pdev->revision == 0xC4) {
 604                 ppi[0] = &info_c4;
 605         } else
 606                 ppi[0] = &info_c5;
 607
 608         ali_init_chipset(pdev);
 609
 610         isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 611         if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
 612                 /* Are we paired with a UDMA capable chip */
 613                 pci_read_config_byte(isa_bridge, 0x5E, &tmp);
 614                 if ((tmp & 0x1E) == 0x12)
 615                         ppi[0] = &info_20_udma;
 616                 pci_dev_put(isa_bridge);
 617         }
 618         return ata_pci_init_one(pdev, ppi);
 619 }
 620
 621 #ifdef CONFIG_PM
 622 static int ali_reinit_one(struct pci_dev *pdev)
 623 {
 624         ali_init_chipset(pdev);
 625         return ata_pci_device_resume(pdev);
 626 }
 627 #endif
 628
 629 static const struct pci_device_id ali[] = {
 630         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), },
 631         { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), },
 632
 633         { },
 634 };
 635
 636 static struct pci_driver ali_pci_driver = {
 637         .name           = DRV_NAME,
 638         .id_table       = ali,
 639         .probe          = ali_init_one,
 640         .remove         = ata_pci_remove_one,
 641 #ifdef CONFIG_PM
 642         .suspend        = ata_pci_device_suspend,
 643         .resume         = ali_reinit_one,
 644 #endif
 645 };
 646
 647 static int __init ali_init(void)
 648 {
 649         return pci_register_driver(&ali_pci_driver);
 650 }
 651
 652
 653 static void __exit ali_exit(void)
 654 {
 655         pci_unregister_driver(&ali_pci_driver);
 656 }
 657
 658
 659 MODULE_AUTHOR("Alan Cox");
 660 MODULE_DESCRIPTION("low-level driver for ALi PATA");
 661 MODULE_LICENSE("GPL");
 662 MODULE_DEVICE_TABLE(pci, ali);
 663 MODULE_VERSION(DRV_VERSION);
 664
 665 module_init(ali_init);
 666 module_exit(ali_exit);