drivers/ide/setup-pci.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
ide_setup_pci_baseregs
ide_pci_clear_simplex
ide_pci_dma_base
ide_pci_check_simplex
ide_pci_set_master
ide_setup_pci_noise
ide_pci_enable
ide_pci_configure
ide_pci_check_iomem
ide_hw_configure
ide_hwif_setup_dma
ide_setup_pci_controller
ide_pci_setup_ports
do_ide_setup_pci_device
ide_pci_init_two
ide_pci_init_one
ide_pci_remove
ide_pci_suspend
ide_pci_resume
   1 /*
   2  *  Copyright (C) 1998-2000  Andre Hedrick <andre@linux-ide.org>
   3  *  Copyright (C) 1995-1998  Mark Lord
   4  *  Copyright (C) 2007-2009  Bartlomiej Zolnierkiewicz
   5  *
   6  *  May be copied or modified under the terms of the GNU General Public License
   7  */
   8 
   9 #include <linux/types.h>
  10 #include <linux/kernel.h>
  11 #include <linux/export.h>
  12 #include <linux/pci.h>
  13 #include <linux/init.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/ide.h>
  16 #include <linux/dma-mapping.h>
  17 
  18 #include <asm/io.h>
  19 
  20 /**
  21  *      ide_setup_pci_baseregs  -       place a PCI IDE controller native
  22  *      @dev: PCI device of interface to switch native
  23  *      @name: Name of interface
  24  *
  25  *      We attempt to place the PCI interface into PCI native mode. If
  26  *      we succeed the BARs are ok and the controller is in PCI mode.
  27  *      Returns 0 on success or an errno code.
  28  *
  29  *      FIXME: if we program the interface and then fail to set the BARS
  30  *      we don't switch it back to legacy mode. Do we actually care ??
  31  */
  32 
  33 static int ide_setup_pci_baseregs(struct pci_dev *dev, const char *name)
  34 {
  35         u8 progif = 0;
  36 
  37         /*
  38          * Place both IDE interfaces into PCI "native" mode:
  39          */
  40         if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
  41                          (progif & 5) != 5) {
  42                 if ((progif & 0xa) != 0xa) {
  43                         printk(KERN_INFO "%s %s: device not capable of full "
  44                                 "native PCI mode\n", name, pci_name(dev));
  45                         return -EOPNOTSUPP;
  46                 }
  47                 printk(KERN_INFO "%s %s: placing both ports into native PCI "
  48                         "mode\n", name, pci_name(dev));
  49                 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
  50                 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
  51                     (progif & 5) != 5) {
  52                         printk(KERN_ERR "%s %s: rewrite of PROGIF failed, "
  53                                 "wanted 0x%04x, got 0x%04x\n",
  54                                 name, pci_name(dev), progif | 5, progif);
  55                         return -EOPNOTSUPP;
  56                 }
  57         }
  58         return 0;
  59 }
  60 
  61 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
  62 static int ide_pci_clear_simplex(unsigned long dma_base, const char *name)
  63 {
  64         u8 dma_stat = inb(dma_base + 2);
  65 
  66         outb(dma_stat & 0x60, dma_base + 2);
  67         dma_stat = inb(dma_base + 2);
  68 
  69         return (dma_stat & 0x80) ? 1 : 0;
  70 }
  71 
  72 /**
  73  *      ide_pci_dma_base        -       setup BMIBA
  74  *      @hwif: IDE interface
  75  *      @d: IDE port info
  76  *
  77  *      Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
  78  */
  79 
  80 unsigned long ide_pci_dma_base(ide_hwif_t *hwif, const struct ide_port_info *d)
  81 {
  82         struct pci_dev *dev = to_pci_dev(hwif->dev);
  83         unsigned long dma_base = 0;
  84 
  85         if (hwif->host_flags & IDE_HFLAG_MMIO)
  86                 return hwif->dma_base;
  87 
  88         if (hwif->mate && hwif->mate->dma_base) {
  89                 dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
  90         } else {
  91                 u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;
  92 
  93                 dma_base = pci_resource_start(dev, baridx);
  94 
  95                 if (dma_base == 0) {
  96                         printk(KERN_ERR "%s %s: DMA base is invalid\n",
  97                                 d->name, pci_name(dev));
  98                         return 0;
  99                 }
 100         }
 101 
 102         if (hwif->channel)
 103                 dma_base += 8;
 104 
 105         return dma_base;
 106 }
 107 EXPORT_SYMBOL_GPL(ide_pci_dma_base);
 108 
 109 int ide_pci_check_simplex(ide_hwif_t *hwif, const struct ide_port_info *d)
 110 {
 111         struct pci_dev *dev = to_pci_dev(hwif->dev);
 112         u8 dma_stat;
 113 
 114         if (d->host_flags & (IDE_HFLAG_MMIO | IDE_HFLAG_CS5520))
 115                 goto out;
 116 
 117         if (d->host_flags & IDE_HFLAG_CLEAR_SIMPLEX) {
 118                 if (ide_pci_clear_simplex(hwif->dma_base, d->name))
 119                         printk(KERN_INFO "%s %s: simplex device: DMA forced\n",
 120                                 d->name, pci_name(dev));
 121                 goto out;
 122         }
 123 
 124         /*
 125          * If the device claims "simplex" DMA, this means that only one of
 126          * the two interfaces can be trusted with DMA at any point in time
 127          * (so we should enable DMA only on one of the two interfaces).
 128          *
 129          * FIXME: At this point we haven't probed the drives so we can't make
 130          * the appropriate decision.  Really we should defer this problem until
 131          * we tune the drive then try to grab DMA ownership if we want to be
 132          * the DMA end.  This has to be become dynamic to handle hot-plug.
 133          */
 134         dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
 135         if ((dma_stat & 0x80) && hwif->mate && hwif->mate->dma_base) {
 136                 printk(KERN_INFO "%s %s: simplex device: DMA disabled\n",
 137                         d->name, pci_name(dev));
 138                 return -1;
 139         }
 140 out:
 141         return 0;
 142 }
 143 EXPORT_SYMBOL_GPL(ide_pci_check_simplex);
 144 
 145 /*
 146  * Set up BM-DMA capability (PnP BIOS should have done this)
 147  */
 148 int ide_pci_set_master(struct pci_dev *dev, const char *name)
 149 {
 150         u16 pcicmd;
 151 
 152         pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
 153 
 154         if ((pcicmd & PCI_COMMAND_MASTER) == 0) {
 155                 pci_set_master(dev);
 156 
 157                 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) ||
 158                     (pcicmd & PCI_COMMAND_MASTER) == 0) {
 159                         printk(KERN_ERR "%s %s: error updating PCICMD\n",
 160                                 name, pci_name(dev));
 161                         return -EIO;
 162                 }
 163         }
 164 
 165         return 0;
 166 }
 167 EXPORT_SYMBOL_GPL(ide_pci_set_master);
 168 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
 169 
 170 void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
 171 {
 172         printk(KERN_INFO "%s %s: IDE controller (0x%04x:0x%04x rev 0x%02x)\n",
 173                 d->name, pci_name(dev),
 174                 dev->vendor, dev->device, dev->revision);
 175 }
 176 EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
 177 
 178 
 179 /**
 180  *      ide_pci_enable  -       do PCI enables
 181  *      @dev: PCI device
 182  *      @bars: PCI BARs mask
 183  *      @d: IDE port info
 184  *
 185  *      Enable the IDE PCI device. We attempt to enable the device in full
 186  *      but if that fails then we only need IO space. The PCI code should
 187  *      have setup the proper resources for us already for controllers in
 188  *      legacy mode.
 189  *
 190  *      Returns zero on success or an error code
 191  */
 192 
 193 static int ide_pci_enable(struct pci_dev *dev, int bars,
 194                           const struct ide_port_info *d)
 195 {
 196         int ret;
 197 
 198         if (pci_enable_device(dev)) {
 199                 ret = pci_enable_device_io(dev);
 200                 if (ret < 0) {
 201                         printk(KERN_WARNING "%s %s: couldn't enable device\n",
 202                                 d->name, pci_name(dev));
 203                         goto out;
 204                 }
 205                 printk(KERN_WARNING "%s %s: BIOS configuration fixed\n",
 206                         d->name, pci_name(dev));
 207         }
 208 
 209         /*
 210          * assume all devices can do 32-bit DMA for now, we can add
 211          * a DMA mask field to the struct ide_port_info if we need it
 212          * (or let lower level driver set the DMA mask)
 213          */
 214         ret = dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
 215         if (ret < 0) {
 216                 printk(KERN_ERR "%s %s: can't set DMA mask\n",
 217                         d->name, pci_name(dev));
 218                 goto out;
 219         }
 220 
 221         ret = pci_request_selected_regions(dev, bars, d->name);
 222         if (ret < 0)
 223                 printk(KERN_ERR "%s %s: can't reserve resources\n",
 224                         d->name, pci_name(dev));
 225 out:
 226         return ret;
 227 }
 228 
 229 /**
 230  *      ide_pci_configure       -       configure an unconfigured device
 231  *      @dev: PCI device
 232  *      @d: IDE port info
 233  *
 234  *      Enable and configure the PCI device we have been passed.
 235  *      Returns zero on success or an error code.
 236  */
 237 
 238 static int ide_pci_configure(struct pci_dev *dev, const struct ide_port_info *d)
 239 {
 240         u16 pcicmd = 0;
 241         /*
 242          * PnP BIOS was *supposed* to have setup this device, but we
 243          * can do it ourselves, so long as the BIOS has assigned an IRQ
 244          * (or possibly the device is using a "legacy header" for IRQs).
 245          * Maybe the user deliberately *disabled* the device,
 246          * but we'll eventually ignore it again if no drives respond.
 247          */
 248         if (ide_setup_pci_baseregs(dev, d->name) ||
 249             pci_write_config_word(dev, PCI_COMMAND, pcicmd | PCI_COMMAND_IO)) {
 250                 printk(KERN_INFO "%s %s: device disabled (BIOS)\n",
 251                         d->name, pci_name(dev));
 252                 return -ENODEV;
 253         }
 254         if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
 255                 printk(KERN_ERR "%s %s: error accessing PCI regs\n",
 256                         d->name, pci_name(dev));
 257                 return -EIO;
 258         }
 259         if (!(pcicmd & PCI_COMMAND_IO)) {
 260                 printk(KERN_ERR "%s %s: unable to enable IDE controller\n",
 261                         d->name, pci_name(dev));
 262                 return -ENXIO;
 263         }
 264         return 0;
 265 }
 266 
 267 /**
 268  *      ide_pci_check_iomem     -       check a register is I/O
 269  *      @dev: PCI device
 270  *      @d: IDE port info
 271  *      @bar: BAR number
 272  *
 273  *      Checks if a BAR is configured and points to MMIO space. If so,
 274  *      return an error code. Otherwise return 0
 275  */
 276 
 277 static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *d,
 278                                int bar)
 279 {
 280         ulong flags = pci_resource_flags(dev, bar);
 281 
 282         /* Unconfigured ? */
 283         if (!flags || pci_resource_len(dev, bar) == 0)
 284                 return 0;
 285 
 286         /* I/O space */
 287         if (flags & IORESOURCE_IO)
 288                 return 0;
 289 
 290         /* Bad */
 291         return -EINVAL;
 292 }
 293 
 294 /**
 295  *      ide_hw_configure        -       configure a struct ide_hw instance
 296  *      @dev: PCI device holding interface
 297  *      @d: IDE port info
 298  *      @port: port number
 299  *      @hw: struct ide_hw instance corresponding to this port
 300  *
 301  *      Perform the initial set up for the hardware interface structure. This
 302  *      is done per interface port rather than per PCI device. There may be
 303  *      more than one port per device.
 304  *
 305  *      Returns zero on success or an error code.
 306  */
 307 
 308 static int ide_hw_configure(struct pci_dev *dev, const struct ide_port_info *d,
 309                             unsigned int port, struct ide_hw *hw)
 310 {
 311         unsigned long ctl = 0, base = 0;
 312 
 313         if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
 314                 if (ide_pci_check_iomem(dev, d, 2 * port) ||
 315                     ide_pci_check_iomem(dev, d, 2 * port + 1)) {
 316                         printk(KERN_ERR "%s %s: I/O baseregs (BIOS) are "
 317                                 "reported as MEM for port %d!\n",
 318                                 d->name, pci_name(dev), port);
 319                         return -EINVAL;
 320                 }
 321 
 322                 ctl  = pci_resource_start(dev, 2*port+1);
 323                 base = pci_resource_start(dev, 2*port);
 324         } else {
 325                 /* Use default values */
 326                 ctl = port ? 0x374 : 0x3f4;
 327                 base = port ? 0x170 : 0x1f0;
 328         }
 329 
 330         if (!base || !ctl) {
 331                 printk(KERN_ERR "%s %s: bad PCI BARs for port %d, skipping\n",
 332                         d->name, pci_name(dev), port);
 333                 return -EINVAL;
 334         }
 335 
 336         memset(hw, 0, sizeof(*hw));
 337         hw->dev = &dev->dev;
 338         ide_std_init_ports(hw, base, ctl | 2);
 339 
 340         return 0;
 341 }
 342 
 343 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
 344 /**
 345  *      ide_hwif_setup_dma      -       configure DMA interface
 346  *      @hwif: IDE interface
 347  *      @d: IDE port info
 348  *
 349  *      Set up the DMA base for the interface. Enable the master bits as
 350  *      necessary and attempt to bring the device DMA into a ready to use
 351  *      state
 352  */
 353 
 354 int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
 355 {
 356         struct pci_dev *dev = to_pci_dev(hwif->dev);
 357 
 358         if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
 359             ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
 360              (dev->class & 0x80))) {
 361                 unsigned long base = ide_pci_dma_base(hwif, d);
 362 
 363                 if (base == 0)
 364                         return -1;
 365 
 366                 hwif->dma_base = base;
 367 
 368                 if (hwif->dma_ops == NULL)
 369                         hwif->dma_ops = &sff_dma_ops;
 370 
 371                 if (ide_pci_check_simplex(hwif, d) < 0)
 372                         return -1;
 373 
 374                 if (ide_pci_set_master(dev, d->name) < 0)
 375                         return -1;
 376 
 377                 if (hwif->host_flags & IDE_HFLAG_MMIO)
 378                         printk(KERN_INFO "    %s: MMIO-DMA\n", hwif->name);
 379                 else
 380                         printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
 381                                          hwif->name, base, base + 7);
 382 
 383                 hwif->extra_base = base + (hwif->channel ? 8 : 16);
 384 
 385                 if (ide_allocate_dma_engine(hwif))
 386                         return -1;
 387         }
 388 
 389         return 0;
 390 }
 391 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
 392 
 393 /**
 394  *      ide_setup_pci_controller        -       set up IDE PCI
 395  *      @dev: PCI device
 396  *      @bars: PCI BARs mask
 397  *      @d: IDE port info
 398  *      @noisy: verbose flag
 399  *
 400  *      Set up the PCI and controller side of the IDE interface. This brings
 401  *      up the PCI side of the device, checks that the device is enabled
 402  *      and enables it if need be
 403  */
 404 
 405 static int ide_setup_pci_controller(struct pci_dev *dev, int bars,
 406                                     const struct ide_port_info *d, int noisy)
 407 {
 408         int ret;
 409         u16 pcicmd;
 410 
 411         if (noisy)
 412                 ide_setup_pci_noise(dev, d);
 413 
 414         ret = ide_pci_enable(dev, bars, d);
 415         if (ret < 0)
 416                 goto out;
 417 
 418         ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
 419         if (ret < 0) {
 420                 printk(KERN_ERR "%s %s: error accessing PCI regs\n",
 421                         d->name, pci_name(dev));
 422                 goto out_free_bars;
 423         }
 424         if (!(pcicmd & PCI_COMMAND_IO)) {       /* is device disabled? */
 425                 ret = ide_pci_configure(dev, d);
 426                 if (ret < 0)
 427                         goto out_free_bars;
 428                 printk(KERN_INFO "%s %s: device enabled (Linux)\n",
 429                         d->name, pci_name(dev));
 430         }
 431 
 432         goto out;
 433 
 434 out_free_bars:
 435         pci_release_selected_regions(dev, bars);
 436 out:
 437         return ret;
 438 }
 439 
 440 /**
 441  *      ide_pci_setup_ports     -       configure ports/devices on PCI IDE
 442  *      @dev: PCI device
 443  *      @d: IDE port info
 444  *      @hw: struct ide_hw instances corresponding to this PCI IDE device
 445  *      @hws: struct ide_hw pointers table to update
 446  *
 447  *      Scan the interfaces attached to this device and do any
 448  *      necessary per port setup. Attach the devices and ask the
 449  *      generic DMA layer to do its work for us.
 450  *
 451  *      Normally called automaticall from do_ide_pci_setup_device,
 452  *      but is also used directly as a helper function by some controllers
 453  *      where the chipset setup is not the default PCI IDE one.
 454  */
 455 
 456 void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d,
 457                          struct ide_hw *hw, struct ide_hw **hws)
 458 {
 459         int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
 460         u8 tmp;
 461 
 462         /*
 463          * Set up the IDE ports
 464          */
 465 
 466         for (port = 0; port < channels; ++port) {
 467                 const struct ide_pci_enablebit *e = &d->enablebits[port];
 468 
 469                 if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
 470                     (tmp & e->mask) != e->val)) {
 471                         printk(KERN_INFO "%s %s: IDE port disabled\n",
 472                                 d->name, pci_name(dev));
 473                         continue;       /* port not enabled */
 474                 }
 475 
 476                 if (ide_hw_configure(dev, d, port, hw + port))
 477                         continue;
 478 
 479                 *(hws + port) = hw + port;
 480         }
 481 }
 482 EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
 483 
 484 /*
 485  * ide_setup_pci_device() looks at the primary/secondary interfaces
 486  * on a PCI IDE device and, if they are enabled, prepares the IDE driver
 487  * for use with them.  This generic code works for most PCI chipsets.
 488  *
 489  * One thing that is not standardized is the location of the
 490  * primary/secondary interface "enable/disable" bits.  For chipsets that
 491  * we "know" about, this information is in the struct ide_port_info;
 492  * for all other chipsets, we just assume both interfaces are enabled.
 493  */
 494 static int do_ide_setup_pci_device(struct pci_dev *dev,
 495                                    const struct ide_port_info *d,
 496                                    u8 noisy)
 497 {
 498         int pciirq, ret;
 499 
 500         /*
 501          * Can we trust the reported IRQ?
 502          */
 503         pciirq = dev->irq;
 504 
 505         /*
 506          * This allows offboard ide-pci cards the enable a BIOS,
 507          * verify interrupt settings of split-mirror pci-config
 508          * space, place chipset into init-mode, and/or preserve
 509          * an interrupt if the card is not native ide support.
 510          */
 511         ret = d->init_chipset ? d->init_chipset(dev) : 0;
 512         if (ret < 0)
 513                 goto out;
 514 
 515         if (ide_pci_is_in_compatibility_mode(dev)) {
 516                 if (noisy)
 517                         printk(KERN_INFO "%s %s: not 100%% native mode: will "
 518                                 "probe irqs later\n", d->name, pci_name(dev));
 519                 pciirq = 0;
 520         } else if (!pciirq && noisy) {
 521                 printk(KERN_WARNING "%s %s: bad irq (%d): will probe later\n",
 522                         d->name, pci_name(dev), pciirq);
 523         } else if (noisy) {
 524                 printk(KERN_INFO "%s %s: 100%% native mode on irq %d\n",
 525                         d->name, pci_name(dev), pciirq);
 526         }
 527 
 528         ret = pciirq;
 529 out:
 530         return ret;
 531 }
 532 
 533 int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
 534                      const struct ide_port_info *d, void *priv)
 535 {
 536         struct pci_dev *pdev[] = { dev1, dev2 };
 537         struct ide_host *host;
 538         int ret, i, n_ports = dev2 ? 4 : 2, bars;
 539         struct ide_hw hw[4], *hws[] = { NULL, NULL, NULL, NULL };
 540 
 541         if (d->host_flags & IDE_HFLAG_SINGLE)
 542                 bars = (1 << 2) - 1;
 543         else
 544                 bars = (1 << 4) - 1;
 545 
 546         if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
 547                 if (d->host_flags & IDE_HFLAG_CS5520)
 548                         bars |= (1 << 2);
 549                 else
 550                         bars |= (1 << 4);
 551         }
 552 
 553         for (i = 0; i < n_ports / 2; i++) {
 554                 ret = ide_setup_pci_controller(pdev[i], bars, d, !i);
 555                 if (ret < 0) {
 556                         if (i == 1)
 557                                 pci_release_selected_regions(pdev[0], bars);
 558                         goto out;
 559                 }
 560 
 561                 ide_pci_setup_ports(pdev[i], d, &hw[i*2], &hws[i*2]);
 562         }
 563 
 564         host = ide_host_alloc(d, hws, n_ports);
 565         if (host == NULL) {
 566                 ret = -ENOMEM;
 567                 goto out_free_bars;
 568         }
 569 
 570         host->dev[0] = &dev1->dev;
 571         if (dev2)
 572                 host->dev[1] = &dev2->dev;
 573 
 574         host->host_priv = priv;
 575         host->irq_flags = IRQF_SHARED;
 576 
 577         pci_set_drvdata(pdev[0], host);
 578         if (dev2)
 579                 pci_set_drvdata(pdev[1], host);
 580 
 581         for (i = 0; i < n_ports / 2; i++) {
 582                 ret = do_ide_setup_pci_device(pdev[i], d, !i);
 583 
 584                 /*
 585                  * FIXME: Mom, mom, they stole me the helper function to undo
 586                  * do_ide_setup_pci_device() on the first device!
 587                  */
 588                 if (ret < 0)
 589                         goto out_free_bars;
 590 
 591                 /* fixup IRQ */
 592                 if (ide_pci_is_in_compatibility_mode(pdev[i])) {
 593                         hw[i*2].irq = pci_get_legacy_ide_irq(pdev[i], 0);
 594                         hw[i*2 + 1].irq = pci_get_legacy_ide_irq(pdev[i], 1);
 595                 } else
 596                         hw[i*2 + 1].irq = hw[i*2].irq = ret;
 597         }
 598 
 599         ret = ide_host_register(host, d, hws);
 600         if (ret)
 601                 ide_host_free(host);
 602         else
 603                 goto out;
 604 
 605 out_free_bars:
 606         i = n_ports / 2;
 607         while (i--)
 608                 pci_release_selected_regions(pdev[i], bars);
 609 out:
 610         return ret;
 611 }
 612 EXPORT_SYMBOL_GPL(ide_pci_init_two);
 613 
 614 int ide_pci_init_one(struct pci_dev *dev, const struct ide_port_info *d,
 615                      void *priv)
 616 {
 617         return ide_pci_init_two(dev, NULL, d, priv);
 618 }
 619 EXPORT_SYMBOL_GPL(ide_pci_init_one);
 620 
 621 void ide_pci_remove(struct pci_dev *dev)
 622 {
 623         struct ide_host *host = pci_get_drvdata(dev);
 624         struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
 625         int bars;
 626 
 627         if (host->host_flags & IDE_HFLAG_SINGLE)
 628                 bars = (1 << 2) - 1;
 629         else
 630                 bars = (1 << 4) - 1;
 631 
 632         if ((host->host_flags & IDE_HFLAG_NO_DMA) == 0) {
 633                 if (host->host_flags & IDE_HFLAG_CS5520)
 634                         bars |= (1 << 2);
 635                 else
 636                         bars |= (1 << 4);
 637         }
 638 
 639         ide_host_remove(host);
 640 
 641         if (dev2)
 642                 pci_release_selected_regions(dev2, bars);
 643         pci_release_selected_regions(dev, bars);
 644 
 645         if (dev2)
 646                 pci_disable_device(dev2);
 647         pci_disable_device(dev);
 648 }
 649 EXPORT_SYMBOL_GPL(ide_pci_remove);
 650 
 651 #ifdef CONFIG_PM
 652 int ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
 653 {
 654         pci_save_state(dev);
 655         pci_disable_device(dev);
 656         pci_set_power_state(dev, pci_choose_state(dev, state));
 657 
 658         return 0;
 659 }
 660 EXPORT_SYMBOL_GPL(ide_pci_suspend);
 661 
 662 int ide_pci_resume(struct pci_dev *dev)
 663 {
 664         struct ide_host *host = pci_get_drvdata(dev);
 665         int rc;
 666 
 667         pci_set_power_state(dev, PCI_D0);
 668 
 669         rc = pci_enable_device(dev);
 670         if (rc)
 671                 return rc;
 672 
 673         pci_restore_state(dev);
 674         pci_set_master(dev);
 675 
 676         if (host->init_chipset)
 677                 host->init_chipset(dev);
 678 
 679         return 0;
 680 }
 681 EXPORT_SYMBOL_GPL(ide_pci_resume);
 682 #endif
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/ide/setup-pci.c

DEFINITIONS
