linux/drivers/ide/setup-pci.c
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   1/*
   2 *  linux/drivers/ide/setup-pci.c               Version 1.10    2002/08/19
   3 *
   4 *  Copyright (c) 1998-2000  Andre Hedrick <andre@linux-ide.org>
   5 *
   6 *  Copyright (c) 1995-1998  Mark Lord
   7 *  May be copied or modified under the terms of the GNU General Public License
   8 */
   9
  10#include <linux/module.h>
  11#include <linux/types.h>
  12#include <linux/kernel.h>
  13#include <linux/pci.h>
  14#include <linux/init.h>
  15#include <linux/timer.h>
  16#include <linux/mm.h>
  17#include <linux/interrupt.h>
  18#include <linux/ide.h>
  19#include <linux/dma-mapping.h>
  20
  21#include <asm/io.h>
  22#include <asm/irq.h>
  23
  24
  25/**
  26 *      ide_match_hwif  -       match a PCI IDE against an ide_hwif
  27 *      @io_base: I/O base of device
  28 *      @bootable: set if its bootable
  29 *      @name: name of device
  30 *
  31 *      Match a PCI IDE port against an entry in ide_hwifs[],
  32 *      based on io_base port if possible. Return the matching hwif,
  33 *      or a new hwif. If we find an error (clashing, out of devices, etc)
  34 *      return NULL
  35 *
  36 *      FIXME: we need to handle mmio matches here too
  37 */
  38
  39static ide_hwif_t *ide_match_hwif(unsigned long io_base, u8 bootable, const char *name)
  40{
  41        int h;
  42        ide_hwif_t *hwif;
  43
  44        /*
  45         * Look for a hwif with matching io_base specified using
  46         * parameters to ide_setup().
  47         */
  48        for (h = 0; h < MAX_HWIFS; ++h) {
  49                hwif = &ide_hwifs[h];
  50                if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
  51                        if (hwif->chipset == ide_forced)
  52                                return hwif; /* a perfect match */
  53                }
  54        }
  55        /*
  56         * Look for a hwif with matching io_base default value.
  57         * If chipset is "ide_unknown", then claim that hwif slot.
  58         * Otherwise, some other chipset has already claimed it..  :(
  59         */
  60        for (h = 0; h < MAX_HWIFS; ++h) {
  61                hwif = &ide_hwifs[h];
  62                if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
  63                        if (hwif->chipset == ide_unknown)
  64                                return hwif; /* match */
  65                        printk(KERN_ERR "%s: port 0x%04lx already claimed by %s\n",
  66                                name, io_base, hwif->name);
  67                        return NULL;    /* already claimed */
  68                }
  69        }
  70        /*
  71         * Okay, there is no hwif matching our io_base,
  72         * so we'll just claim an unassigned slot.
  73         * Give preference to claiming other slots before claiming ide0/ide1,
  74         * just in case there's another interface yet-to-be-scanned
  75         * which uses ports 1f0/170 (the ide0/ide1 defaults).
  76         *
  77         * Unless there is a bootable card that does not use the standard
  78         * ports 1f0/170 (the ide0/ide1 defaults). The (bootable) flag.
  79         */
  80        if (bootable) {
  81                for (h = 0; h < MAX_HWIFS; ++h) {
  82                        hwif = &ide_hwifs[h];
  83                        if (hwif->chipset == ide_unknown)
  84                                return hwif;    /* pick an unused entry */
  85                }
  86        } else {
  87                for (h = 2; h < MAX_HWIFS; ++h) {
  88                        hwif = ide_hwifs + h;
  89                        if (hwif->chipset == ide_unknown)
  90                                return hwif;    /* pick an unused entry */
  91                }
  92        }
  93        for (h = 0; h < 2 && h < MAX_HWIFS; ++h) {
  94                hwif = ide_hwifs + h;
  95                if (hwif->chipset == ide_unknown)
  96                        return hwif;    /* pick an unused entry */
  97        }
  98        printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n", name);
  99        return NULL;
 100}
 101
 102/**
 103 *      ide_setup_pci_baseregs  -       place a PCI IDE controller native
 104 *      @dev: PCI device of interface to switch native
 105 *      @name: Name of interface
 106 *
 107 *      We attempt to place the PCI interface into PCI native mode. If
 108 *      we succeed the BARs are ok and the controller is in PCI mode.
 109 *      Returns 0 on success or an errno code. 
 110 *
 111 *      FIXME: if we program the interface and then fail to set the BARS
 112 *      we don't switch it back to legacy mode. Do we actually care ??
 113 */
 114 
 115static int ide_setup_pci_baseregs (struct pci_dev *dev, const char *name)
 116{
 117        u8 progif = 0;
 118
 119        /*
 120         * Place both IDE interfaces into PCI "native" mode:
 121         */
 122        if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
 123                         (progif & 5) != 5) {
 124                if ((progif & 0xa) != 0xa) {
 125                        printk(KERN_INFO "%s: device not capable of full "
 126                                "native PCI mode\n", name);
 127                        return -EOPNOTSUPP;
 128                }
 129                printk("%s: placing both ports into native PCI mode\n", name);
 130                (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
 131                if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
 132                    (progif & 5) != 5) {
 133                        printk(KERN_ERR "%s: rewrite of PROGIF failed, wanted "
 134                                "0x%04x, got 0x%04x\n",
 135                                name, progif|5, progif);
 136                        return -EOPNOTSUPP;
 137                }
 138        }
 139        return 0;
 140}
 141
 142#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
 143/**
 144 *      ide_get_or_set_dma_base         -       setup BMIBA
 145 *      @d: IDE port info
 146 *      @hwif: IDE interface
 147 *
 148 *      Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
 149 *      Where a device has a partner that is already in DMA mode we check
 150 *      and enforce IDE simplex rules.
 151 */
 152
 153static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_hwif_t *hwif)
 154{
 155        unsigned long   dma_base = 0;
 156        struct pci_dev  *dev = hwif->pci_dev;
 157
 158        if (hwif->mmio)
 159                return hwif->dma_base;
 160
 161        if (hwif->mate && hwif->mate->dma_base) {
 162                dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
 163        } else {
 164                u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;
 165
 166                dma_base = pci_resource_start(dev, baridx);
 167
 168                if (dma_base == 0)
 169                        printk(KERN_ERR "%s: DMA base is invalid\n", d->name);
 170        }
 171
 172        if ((d->host_flags & IDE_HFLAG_CS5520) == 0 && dma_base) {
 173                u8 simplex_stat = 0;
 174                dma_base += hwif->channel ? 8 : 0;
 175
 176                switch(dev->device) {
 177                        case PCI_DEVICE_ID_AL_M5219:
 178                        case PCI_DEVICE_ID_AL_M5229:
 179                        case PCI_DEVICE_ID_AMD_VIPER_7409:
 180                        case PCI_DEVICE_ID_CMD_643:
 181                        case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
 182                        case PCI_DEVICE_ID_REVOLUTION:
 183                                simplex_stat = inb(dma_base + 2);
 184                                outb(simplex_stat & 0x60, dma_base + 2);
 185                                simplex_stat = inb(dma_base + 2);
 186                                if (simplex_stat & 0x80) {
 187                                        printk(KERN_INFO "%s: simplex device: "
 188                                                         "DMA forced\n",
 189                                                         d->name);
 190                                }
 191                                break;
 192                        default:
 193                                /*
 194                                 * If the device claims "simplex" DMA,
 195                                 * this means only one of the two interfaces
 196                                 * can be trusted with DMA at any point in time.
 197                                 * So we should enable DMA only on one of the
 198                                 * two interfaces.
 199                                 */
 200                                simplex_stat = hwif->INB(dma_base + 2);
 201                                if (simplex_stat & 0x80) {
 202                                        /* simplex device? */
 203/*
 204 *      At this point we haven't probed the drives so we can't make the
 205 *      appropriate decision. Really we should defer this problem
 206 *      until we tune the drive then try to grab DMA ownership if we want
 207 *      to be the DMA end. This has to be become dynamic to handle hot
 208 *      plug.
 209 */
 210                                        if (hwif->mate && hwif->mate->dma_base) {
 211                                                printk(KERN_INFO "%s: simplex device: "
 212                                                                 "DMA disabled\n",
 213                                                                 d->name);
 214                                                dma_base = 0;
 215                                        }
 216                                }
 217                }
 218        }
 219        return dma_base;
 220}
 221#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
 222
 223void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
 224{
 225        printk(KERN_INFO "%s: IDE controller (0x%04x:0x%04x rev 0x%02x) at "
 226                         " PCI slot %s\n", d->name, dev->vendor, dev->device,
 227                         dev->revision, pci_name(dev));
 228}
 229
 230EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
 231
 232
 233/**
 234 *      ide_pci_enable  -       do PCI enables
 235 *      @dev: PCI device
 236 *      @d: IDE port info
 237 *
 238 *      Enable the IDE PCI device. We attempt to enable the device in full
 239 *      but if that fails then we only need BAR4 so we will enable that.
 240 *      
 241 *      Returns zero on success or an error code
 242 */
 243
 244static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d)
 245{
 246        int ret;
 247
 248        if (pci_enable_device(dev)) {
 249                ret = pci_enable_device_bars(dev, 1 << 4);
 250                if (ret < 0) {
 251                        printk(KERN_WARNING "%s: (ide_setup_pci_device:) "
 252                                "Could not enable device.\n", d->name);
 253                        goto out;
 254                }
 255                printk(KERN_WARNING "%s: BIOS configuration fixed.\n", d->name);
 256        }
 257
 258        /*
 259         * assume all devices can do 32-bit DMA for now, we can add
 260         * a DMA mask field to the struct ide_port_info if we need it
 261         * (or let lower level driver set the DMA mask)
 262         */
 263        ret = pci_set_dma_mask(dev, DMA_32BIT_MASK);
 264        if (ret < 0) {
 265                printk(KERN_ERR "%s: can't set dma mask\n", d->name);
 266                goto out;
 267        }
 268
 269        /* FIXME: Temporary - until we put in the hotplug interface logic
 270           Check that the bits we want are not in use by someone else. */
 271        ret = pci_request_region(dev, 4, "ide_tmp");
 272        if (ret < 0)
 273                goto out;
 274
 275        pci_release_region(dev, 4);
 276out:
 277        return ret;
 278}
 279
 280/**
 281 *      ide_pci_configure       -       configure an unconfigured device
 282 *      @dev: PCI device
 283 *      @d: IDE port info
 284 *
 285 *      Enable and configure the PCI device we have been passed.
 286 *      Returns zero on success or an error code.
 287 */
 288
 289static int ide_pci_configure(struct pci_dev *dev, const struct ide_port_info *d)
 290{
 291        u16 pcicmd = 0;
 292        /*
 293         * PnP BIOS was *supposed* to have setup this device, but we
 294         * can do it ourselves, so long as the BIOS has assigned an IRQ
 295         * (or possibly the device is using a "legacy header" for IRQs).
 296         * Maybe the user deliberately *disabled* the device,
 297         * but we'll eventually ignore it again if no drives respond.
 298         */
 299        if (ide_setup_pci_baseregs(dev, d->name) || pci_write_config_word(dev, PCI_COMMAND, pcicmd|PCI_COMMAND_IO)) 
 300        {
 301                printk(KERN_INFO "%s: device disabled (BIOS)\n", d->name);
 302                return -ENODEV;
 303        }
 304        if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
 305                printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
 306                return -EIO;
 307        }
 308        if (!(pcicmd & PCI_COMMAND_IO)) {
 309                printk(KERN_ERR "%s: unable to enable IDE controller\n", d->name);
 310                return -ENXIO;
 311        }
 312        return 0;
 313}
 314
 315/**
 316 *      ide_pci_check_iomem     -       check a register is I/O
 317 *      @dev: PCI device
 318 *      @d: IDE port info
 319 *      @bar: BAR number
 320 *
 321 *      Checks if a BAR is configured and points to MMIO space. If so
 322 *      print an error and return an error code. Otherwise return 0
 323 */
 324
 325static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *d, int bar)
 326{
 327        ulong flags = pci_resource_flags(dev, bar);
 328        
 329        /* Unconfigured ? */
 330        if (!flags || pci_resource_len(dev, bar) == 0)
 331                return 0;
 332
 333        /* I/O space */         
 334        if(flags & PCI_BASE_ADDRESS_IO_MASK)
 335                return 0;
 336                
 337        /* Bad */
 338        printk(KERN_ERR "%s: IO baseregs (BIOS) are reported "
 339                        "as MEM, report to "
 340                        "<andre@linux-ide.org>.\n", d->name);
 341        return -EINVAL;
 342}
 343
 344/**
 345 *      ide_hwif_configure      -       configure an IDE interface
 346 *      @dev: PCI device holding interface
 347 *      @d: IDE port info
 348 *      @mate: Paired interface if any
 349 *
 350 *      Perform the initial set up for the hardware interface structure. This
 351 *      is done per interface port rather than per PCI device. There may be
 352 *      more than one port per device.
 353 *
 354 *      Returns the new hardware interface structure, or NULL on a failure
 355 */
 356
 357static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, const struct ide_port_info *d, ide_hwif_t *mate, int port, int irq)
 358{
 359        unsigned long ctl = 0, base = 0;
 360        ide_hwif_t *hwif;
 361        u8 bootable = (d->host_flags & IDE_HFLAG_BOOTABLE) ? 1 : 0;
 362
 363        if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
 364                /*  Possibly we should fail if these checks report true */
 365                ide_pci_check_iomem(dev, d, 2*port);
 366                ide_pci_check_iomem(dev, d, 2*port+1);
 367 
 368                ctl  = pci_resource_start(dev, 2*port+1);
 369                base = pci_resource_start(dev, 2*port);
 370                if ((ctl && !base) || (base && !ctl)) {
 371                        printk(KERN_ERR "%s: inconsistent baseregs (BIOS) "
 372                                "for port %d, skipping\n", d->name, port);
 373                        return NULL;
 374                }
 375        }
 376        if (!ctl)
 377        {
 378                /* Use default values */
 379                ctl = port ? 0x374 : 0x3f4;
 380                base = port ? 0x170 : 0x1f0;
 381        }
 382        if ((hwif = ide_match_hwif(base, bootable, d->name)) == NULL)
 383                return NULL;    /* no room in ide_hwifs[] */
 384        if (hwif->io_ports[IDE_DATA_OFFSET] != base ||
 385            hwif->io_ports[IDE_CONTROL_OFFSET] != (ctl | 2)) {
 386                hw_regs_t hw;
 387
 388                memset(&hw, 0, sizeof(hw));
 389#ifndef CONFIG_IDE_ARCH_OBSOLETE_INIT
 390                ide_std_init_ports(&hw, base, ctl | 2);
 391#else
 392                ide_init_hwif_ports(&hw, base, ctl | 2, NULL);
 393#endif
 394                memcpy(hwif->io_ports, hw.io_ports, sizeof(hwif->io_ports));
 395                hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 396        }
 397        hwif->chipset = d->chipset ? d->chipset : ide_pci;
 398        hwif->pci_dev = dev;
 399        hwif->cds = d;
 400        hwif->channel = port;
 401
 402        if (!hwif->irq)
 403                hwif->irq = irq;
 404        if (mate) {
 405                hwif->mate = mate;
 406                mate->mate = hwif;
 407        }
 408        return hwif;
 409}
 410
 411/**
 412 *      ide_hwif_setup_dma      -       configure DMA interface
 413 *      @dev: PCI device
 414 *      @d: IDE port info
 415 *      @hwif: IDE interface
 416 *
 417 *      Set up the DMA base for the interface. Enable the master bits as
 418 *      necessary and attempt to bring the device DMA into a ready to use
 419 *      state
 420 */
 421
 422static void ide_hwif_setup_dma(struct pci_dev *dev, const struct ide_port_info *d, ide_hwif_t *hwif)
 423{
 424#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
 425        u16 pcicmd;
 426
 427        pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
 428
 429        if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
 430            ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
 431             (dev->class & 0x80))) {
 432                unsigned long dma_base = ide_get_or_set_dma_base(d, hwif);
 433                if (dma_base && !(pcicmd & PCI_COMMAND_MASTER)) {
 434                        /*
 435                         * Set up BM-DMA capability
 436                         * (PnP BIOS should have done this)
 437                         */
 438                        pci_set_master(dev);
 439                        if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) || !(pcicmd & PCI_COMMAND_MASTER)) {
 440                                printk(KERN_ERR "%s: %s error updating PCICMD\n",
 441                                        hwif->name, d->name);
 442                                dma_base = 0;
 443                        }
 444                }
 445                if (dma_base) {
 446                        if (d->init_dma) {
 447                                d->init_dma(hwif, dma_base);
 448                        } else {
 449                                ide_setup_dma(hwif, dma_base, 8);
 450                        }
 451                } else {
 452                        printk(KERN_INFO "%s: %s Bus-Master DMA disabled "
 453                                "(BIOS)\n", hwif->name, d->name);
 454                }
 455        }
 456#endif /* CONFIG_BLK_DEV_IDEDMA_PCI*/
 457}
 458
 459/**
 460 *      ide_setup_pci_controller        -       set up IDE PCI
 461 *      @dev: PCI device
 462 *      @d: IDE port info
 463 *      @noisy: verbose flag
 464 *      @config: returned as 1 if we configured the hardware
 465 *
 466 *      Set up the PCI and controller side of the IDE interface. This brings
 467 *      up the PCI side of the device, checks that the device is enabled
 468 *      and enables it if need be
 469 */
 470
 471static int ide_setup_pci_controller(struct pci_dev *dev, const struct ide_port_info *d, int noisy, int *config)
 472{
 473        int ret;
 474        u16 pcicmd;
 475
 476        if (noisy)
 477                ide_setup_pci_noise(dev, d);
 478
 479        ret = ide_pci_enable(dev, d);
 480        if (ret < 0)
 481                goto out;
 482
 483        ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
 484        if (ret < 0) {
 485                printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
 486                goto out;
 487        }
 488        if (!(pcicmd & PCI_COMMAND_IO)) {       /* is device disabled? */
 489                ret = ide_pci_configure(dev, d);
 490                if (ret < 0)
 491                        goto out;
 492                *config = 1;
 493                printk(KERN_INFO "%s: device enabled (Linux)\n", d->name);
 494        }
 495
 496out:
 497        return ret;
 498}
 499
 500/**
 501 *      ide_pci_setup_ports     -       configure ports/devices on PCI IDE
 502 *      @dev: PCI device
 503 *      @d: IDE port info
 504 *      @pciirq: IRQ line
 505 *      @idx: ATA index table to update
 506 *
 507 *      Scan the interfaces attached to this device and do any
 508 *      necessary per port setup. Attach the devices and ask the
 509 *      generic DMA layer to do its work for us.
 510 *
 511 *      Normally called automaticall from do_ide_pci_setup_device,
 512 *      but is also used directly as a helper function by some controllers
 513 *      where the chipset setup is not the default PCI IDE one.
 514 */
 515
 516void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, int pciirq, u8 *idx)
 517{
 518        int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
 519        ide_hwif_t *hwif, *mate = NULL;
 520        u8 tmp;
 521
 522        /*
 523         * Set up the IDE ports
 524         */
 525
 526        for (port = 0; port < channels; ++port) {
 527                const ide_pci_enablebit_t *e = &(d->enablebits[port]);
 528
 529                if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
 530                    (tmp & e->mask) != e->val)) {
 531                        printk(KERN_INFO "%s: IDE port disabled\n", d->name);
 532                        continue;       /* port not enabled */
 533                }
 534
 535                if ((hwif = ide_hwif_configure(dev, d, mate, port, pciirq)) == NULL)
 536                        continue;
 537
 538                /* setup proper ancestral information */
 539                hwif->gendev.parent = &dev->dev;
 540
 541                *(idx + port) = hwif->index;
 542
 543                
 544                if (d->init_iops)
 545                        d->init_iops(hwif);
 546
 547                if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
 548                        ide_hwif_setup_dma(dev, d, hwif);
 549
 550                if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
 551                    (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
 552                        hwif->irq = port ? 15 : 14;
 553
 554                hwif->fixup = d->fixup;
 555
 556                hwif->host_flags = d->host_flags;
 557                hwif->pio_mask = d->pio_mask;
 558
 559                if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
 560                        hwif->mate->serialized = hwif->serialized = 1;
 561
 562                if (d->host_flags & IDE_HFLAG_IO_32BIT) {
 563                        hwif->drives[0].io_32bit = 1;
 564                        hwif->drives[1].io_32bit = 1;
 565                }
 566
 567                if (d->host_flags & IDE_HFLAG_UNMASK_IRQS) {
 568                        hwif->drives[0].unmask = 1;
 569                        hwif->drives[1].unmask = 1;
 570                }
 571
 572                if (hwif->dma_base) {
 573                        hwif->swdma_mask = d->swdma_mask;
 574                        hwif->mwdma_mask = d->mwdma_mask;
 575                        hwif->ultra_mask = d->udma_mask;
 576                }
 577
 578                hwif->drives[0].autotune = 1;
 579                hwif->drives[1].autotune = 1;
 580
 581                if (d->host_flags & IDE_HFLAG_RQSIZE_256)
 582                        hwif->rqsize = 256;
 583
 584                if (d->init_hwif)
 585                        /* Call chipset-specific routine
 586                         * for each enabled hwif
 587                         */
 588                        d->init_hwif(hwif);
 589
 590                mate = hwif;
 591        }
 592}
 593
 594EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
 595
 596/*
 597 * ide_setup_pci_device() looks at the primary/secondary interfaces
 598 * on a PCI IDE device and, if they are enabled, prepares the IDE driver
 599 * for use with them.  This generic code works for most PCI chipsets.
 600 *
 601 * One thing that is not standardized is the location of the
 602 * primary/secondary interface "enable/disable" bits.  For chipsets that
 603 * we "know" about, this information is in the struct ide_port_info;
 604 * for all other chipsets, we just assume both interfaces are enabled.
 605 */
 606static int do_ide_setup_pci_device(struct pci_dev *dev,
 607                                   const struct ide_port_info *d,
 608                                   u8 *idx, u8 noisy)
 609{
 610        int tried_config = 0;
 611        int pciirq, ret;
 612
 613        ret = ide_setup_pci_controller(dev, d, noisy, &tried_config);
 614        if (ret < 0)
 615                goto out;
 616
 617        /*
 618         * Can we trust the reported IRQ?
 619         */
 620        pciirq = dev->irq;
 621
 622        /* Is it an "IDE storage" device in non-PCI mode? */
 623        if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5) {
 624                if (noisy)
 625                        printk(KERN_INFO "%s: not 100%% native mode: "
 626                                "will probe irqs later\n", d->name);
 627                /*
 628                 * This allows offboard ide-pci cards the enable a BIOS,
 629                 * verify interrupt settings of split-mirror pci-config
 630                 * space, place chipset into init-mode, and/or preserve
 631                 * an interrupt if the card is not native ide support.
 632                 */
 633                ret = d->init_chipset ? d->init_chipset(dev, d->name) : 0;
 634                if (ret < 0)
 635                        goto out;
 636                pciirq = ret;
 637        } else if (tried_config) {
 638                if (noisy)
 639                        printk(KERN_INFO "%s: will probe irqs later\n", d->name);
 640                pciirq = 0;
 641        } else if (!pciirq) {
 642                if (noisy)
 643                        printk(KERN_WARNING "%s: bad irq (%d): will probe later\n",
 644                                d->name, pciirq);
 645                pciirq = 0;
 646        } else {
 647                if (d->init_chipset) {
 648                        ret = d->init_chipset(dev, d->name);
 649                        if (ret < 0)
 650                                goto out;
 651                }
 652                if (noisy)
 653                        printk(KERN_INFO "%s: 100%% native mode on irq %d\n",
 654                                d->name, pciirq);
 655        }
 656
 657        /* FIXME: silent failure can happen */
 658
 659        ide_pci_setup_ports(dev, d, pciirq, idx);
 660out:
 661        return ret;
 662}
 663
 664int ide_setup_pci_device(struct pci_dev *dev, const struct ide_port_info *d)
 665{
 666        u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 667        int ret;
 668
 669        ret = do_ide_setup_pci_device(dev, d, &idx[0], 1);
 670
 671        if (ret >= 0)
 672                ide_device_add(idx);
 673
 674        return ret;
 675}
 676
 677EXPORT_SYMBOL_GPL(ide_setup_pci_device);
 678
 679int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2,
 680                          const struct ide_port_info *d)
 681{
 682        struct pci_dev *pdev[] = { dev1, dev2 };
 683        int ret, i;
 684        u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 685
 686        for (i = 0; i < 2; i++) {
 687                ret = do_ide_setup_pci_device(pdev[i], d, &idx[i*2], !i);
 688                /*
 689                 * FIXME: Mom, mom, they stole me the helper function to undo
 690                 * do_ide_setup_pci_device() on the first device!
 691                 */
 692                if (ret < 0)
 693                        goto out;
 694        }
 695
 696        ide_device_add(idx);
 697out:
 698        return ret;
 699}
 700
 701EXPORT_SYMBOL_GPL(ide_setup_pci_devices);
 702
 703#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
 704/*
 705 *      Module interfaces
 706 */
 707
 708static int pre_init = 1;                /* Before first ordered IDE scan */
 709static LIST_HEAD(ide_pci_drivers);
 710
 711/*
 712 *      __ide_pci_register_driver       -       attach IDE driver
 713 *      @driver: pci driver
 714 *      @module: owner module of the driver
 715 *
 716 *      Registers a driver with the IDE layer. The IDE layer arranges that
 717 *      boot time setup is done in the expected device order and then
 718 *      hands the controllers off to the core PCI code to do the rest of
 719 *      the work.
 720 *
 721 *      Returns are the same as for pci_register_driver
 722 */
 723
 724int __ide_pci_register_driver(struct pci_driver *driver, struct module *module,
 725                              const char *mod_name)
 726{
 727        if (!pre_init)
 728                return __pci_register_driver(driver, module, mod_name);
 729        driver->driver.owner = module;
 730        list_add_tail(&driver->node, &ide_pci_drivers);
 731        return 0;
 732}
 733EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
 734
 735/**
 736 *      ide_scan_pcidev         -       find an IDE driver for a device
 737 *      @dev: PCI device to check
 738 *
 739 *      Look for an IDE driver to handle the device we are considering.
 740 *      This is only used during boot up to get the ordering correct. After
 741 *      boot up the pci layer takes over the job.
 742 */
 743
 744static int __init ide_scan_pcidev(struct pci_dev *dev)
 745{
 746        struct list_head *l;
 747        struct pci_driver *d;
 748
 749        list_for_each(l, &ide_pci_drivers) {
 750                d = list_entry(l, struct pci_driver, node);
 751                if (d->id_table) {
 752                        const struct pci_device_id *id =
 753                                pci_match_id(d->id_table, dev);
 754
 755                        if (id != NULL && d->probe(dev, id) >= 0) {
 756                                dev->driver = d;
 757                                pci_dev_get(dev);
 758                                return 1;
 759                        }
 760                }
 761        }
 762        return 0;
 763}
 764
 765/**
 766 *      ide_scan_pcibus         -       perform the initial IDE driver scan
 767 *      @scan_direction: set for reverse order scanning
 768 *
 769 *      Perform the initial bus rather than driver ordered scan of the
 770 *      PCI drivers. After this all IDE pci handling becomes standard
 771 *      module ordering not traditionally ordered.
 772 */
 773        
 774void __init ide_scan_pcibus (int scan_direction)
 775{
 776        struct pci_dev *dev = NULL;
 777        struct pci_driver *d;
 778        struct list_head *l, *n;
 779
 780        pre_init = 0;
 781        if (!scan_direction)
 782                while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)))
 783                        ide_scan_pcidev(dev);
 784        else
 785                while ((dev = pci_get_device_reverse(PCI_ANY_ID, PCI_ANY_ID,
 786                                                     dev)))
 787                        ide_scan_pcidev(dev);
 788
 789        /*
 790         *      Hand the drivers over to the PCI layer now we
 791         *      are post init.
 792         */
 793
 794        list_for_each_safe(l, n, &ide_pci_drivers) {
 795                list_del(l);
 796                d = list_entry(l, struct pci_driver, node);
 797                if (__pci_register_driver(d, d->driver.owner,
 798                                          d->driver.mod_name))
 799                        printk(KERN_ERR "%s: failed to register %s driver\n",
 800                                        __FUNCTION__, d->driver.mod_name);
 801        }
 802}
 803#endif
 804
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