linux/drivers/ata/pata_ali.c
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   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
  40static int ali_atapi_dma = 0;
  41module_param_named(atapi_dma, ali_atapi_dma, int, 0644);
  42MODULE_PARM_DESC(atapi_dma, "Enable ATAPI DMA (0=disable, 1=enable)");
  43
  44static struct pci_dev *ali_isa_bridge;
  45
  46/*
  47 *      Cable special cases
  48 */
  49
  50static 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
  68static 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
  89static 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
 118static 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
 141static 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
 170static 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
 207static 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
 241static 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
 284static 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
 308static 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
 321static 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
 341static 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
 358static struct scsi_host_template ali_sht = {
 359        ATA_BMDMA_SHT(DRV_NAME),
 360};
 361
 362/*
 363 *      Port operations for PIO only ALi
 364 */
 365
 366static 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
 373static 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 */
 383static 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 */
 394static 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 */
 405static 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 */
 415static 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
 431static 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
 491static 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
 593static int ali_reinit_one(struct pci_dev *pdev)
 594{
 595        struct ata_host *host = dev_get_drvdata(&pdev->dev);
 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
 607static 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
 614static 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
 625static 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
 637static void __exit ali_exit(void)
 638{
 639        pci_unregister_driver(&ali_pci_driver);
 640        pci_dev_put(ali_isa_bridge);
 641}
 642
 643
 644MODULE_AUTHOR("Alan Cox");
 645MODULE_DESCRIPTION("low-level driver for ALi PATA");
 646MODULE_LICENSE("GPL");
 647MODULE_DEVICE_TABLE(pci, ali);
 648MODULE_VERSION(DRV_VERSION);
 649
 650module_init(ali_init);
 651module_exit(ali_exit);
 652
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