drivers/usb/host/ohci-at91.c

   1 /*
   2  * OHCI HCD (Host Controller Driver) for USB.
   3  *
   4  *  Copyright (C) 2004 SAN People (Pty) Ltd.
   5  *  Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
   6  *
   7  * AT91 Bus Glue
   8  *
   9  * Based on fragments of 2.4 driver by Rick Bronson.
  10  * Based on ohci-omap.c
  11  *
  12  * This file is licenced under the GPL.
  13  */
  14
  15 #include <linux/clk.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/of_platform.h>
  18 #include <linux/of_gpio.h>
  19
  20 #include <mach/hardware.h>
  21 #include <asm/gpio.h>
  22
  23 #include <mach/board.h>
  24 #include <mach/cpu.h>
  25
  26 #ifndef CONFIG_ARCH_AT91
  27 #error "CONFIG_ARCH_AT91 must be defined."
  28 #endif
  29
  30 #define valid_port(index)       ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS)
  31 #define at91_for_each_port(index)       \
  32                 for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++)
  33
  34 /* interface and function clocks; sometimes also an AHB clock */
  35 static struct clk *iclk, *fclk, *hclk;
  36 static int clocked;
  37
  38 extern int usb_disabled(void);
  39
  40 /*-------------------------------------------------------------------------*/
  41
  42 static void at91_start_clock(void)
  43 {
  44         clk_enable(hclk);
  45         clk_enable(iclk);
  46         clk_enable(fclk);
  47         clocked = 1;
  48 }
  49
  50 static void at91_stop_clock(void)
  51 {
  52         clk_disable(fclk);
  53         clk_disable(iclk);
  54         clk_disable(hclk);
  55         clocked = 0;
  56 }
  57
  58 static void at91_start_hc(struct platform_device *pdev)
  59 {
  60         struct usb_hcd *hcd = platform_get_drvdata(pdev);
  61         struct ohci_regs __iomem *regs = hcd->regs;
  62
  63         dev_dbg(&pdev->dev, "start\n");
  64
  65         /*
  66          * Start the USB clocks.
  67          */
  68         at91_start_clock();
  69
  70         /*
  71          * The USB host controller must remain in reset.
  72          */
  73         writel(0, &regs->control);
  74 }
  75
  76 static void at91_stop_hc(struct platform_device *pdev)
  77 {
  78         struct usb_hcd *hcd = platform_get_drvdata(pdev);
  79         struct ohci_regs __iomem *regs = hcd->regs;
  80
  81         dev_dbg(&pdev->dev, "stop\n");
  82
  83         /*
  84          * Put the USB host controller into reset.
  85          */
  86         writel(0, &regs->control);
  87
  88         /*
  89          * Stop the USB clocks.
  90          */
  91         at91_stop_clock();
  92 }
  93
  94
  95 /*-------------------------------------------------------------------------*/
  96
  97 static void __devexit usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);
  98
  99 /* configure so an HC device and id are always provided */
 100 /* always called with process context; sleeping is OK */
 101
 102
 103 /**
 104  * usb_hcd_at91_probe - initialize AT91-based HCDs
 105  * Context: !in_interrupt()
 106  *
 107  * Allocates basic resources for this USB host controller, and
 108  * then invokes the start() method for the HCD associated with it
 109  * through the hotplug entry's driver_data.
 110  */
 111 static int __devinit usb_hcd_at91_probe(const struct hc_driver *driver,
 112                         struct platform_device *pdev)
 113 {
 114         int retval;
 115         struct usb_hcd *hcd = NULL;
 116
 117         if (pdev->num_resources != 2) {
 118                 pr_debug("hcd probe: invalid num_resources");
 119                 return -ENODEV;
 120         }
 121
 122         if ((pdev->resource[0].flags != IORESOURCE_MEM)
 123                         || (pdev->resource[1].flags != IORESOURCE_IRQ)) {
 124                 pr_debug("hcd probe: invalid resource type\n");
 125                 return -ENODEV;
 126         }
 127
 128         hcd = usb_create_hcd(driver, &pdev->dev, "at91");
 129         if (!hcd)
 130                 return -ENOMEM;
 131         hcd->rsrc_start = pdev->resource[0].start;
 132         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
 133
 134         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 135                 pr_debug("request_mem_region failed\n");
 136                 retval = -EBUSY;
 137                 goto err1;
 138         }
 139
 140         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 141         if (!hcd->regs) {
 142                 pr_debug("ioremap failed\n");
 143                 retval = -EIO;
 144                 goto err2;
 145         }
 146
 147         iclk = clk_get(&pdev->dev, "ohci_clk");
 148         if (IS_ERR(iclk)) {
 149                 dev_err(&pdev->dev, "failed to get ohci_clk\n");
 150                 retval = PTR_ERR(iclk);
 151                 goto err3;
 152         }
 153         fclk = clk_get(&pdev->dev, "uhpck");
 154         if (IS_ERR(fclk)) {
 155                 dev_err(&pdev->dev, "failed to get uhpck\n");
 156                 retval = PTR_ERR(fclk);
 157                 goto err4;
 158         }
 159         hclk = clk_get(&pdev->dev, "hclk");
 160         if (IS_ERR(hclk)) {
 161                 dev_err(&pdev->dev, "failed to get hclk\n");
 162                 retval = PTR_ERR(hclk);
 163                 goto err5;
 164         }
 165
 166         at91_start_hc(pdev);
 167         ohci_hcd_init(hcd_to_ohci(hcd));
 168
 169         retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
 170         if (retval == 0)
 171                 return retval;
 172
 173         /* Error handling */
 174         at91_stop_hc(pdev);
 175
 176         clk_put(hclk);
 177  err5:
 178         clk_put(fclk);
 179  err4:
 180         clk_put(iclk);
 181
 182  err3:
 183         iounmap(hcd->regs);
 184
 185  err2:
 186         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 187
 188  err1:
 189         usb_put_hcd(hcd);
 190         return retval;
 191 }
 192
 193
 194 /* may be called with controller, bus, and devices active */
 195
 196 /**
 197  * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs
 198  * @dev: USB Host Controller being removed
 199  * Context: !in_interrupt()
 200  *
 201  * Reverses the effect of usb_hcd_at91_probe(), first invoking
 202  * the HCD's stop() method.  It is always called from a thread
 203  * context, "rmmod" or something similar.
 204  *
 205  */
 206 static void __devexit usb_hcd_at91_remove(struct usb_hcd *hcd,
 207                                 struct platform_device *pdev)
 208 {
 209         usb_remove_hcd(hcd);
 210         at91_stop_hc(pdev);
 211         iounmap(hcd->regs);
 212         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 213         usb_put_hcd(hcd);
 214
 215         clk_put(hclk);
 216         clk_put(fclk);
 217         clk_put(iclk);
 218         fclk = iclk = hclk = NULL;
 219
 220         dev_set_drvdata(&pdev->dev, NULL);
 221 }
 222
 223 /*-------------------------------------------------------------------------*/
 224
 225 static int __devinit
 226 ohci_at91_start (struct usb_hcd *hcd)
 227 {
 228         struct at91_usbh_data   *board = hcd->self.controller->platform_data;
 229         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 230         int                     ret;
 231
 232         if ((ret = ohci_init(ohci)) < 0)
 233                 return ret;
 234
 235         ohci->num_ports = board->ports;
 236
 237         if ((ret = ohci_run(ohci)) < 0) {
 238                 err("can't start %s", hcd->self.bus_name);
 239                 ohci_stop(hcd);
 240                 return ret;
 241         }
 242         return 0;
 243 }
 244
 245 static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable)
 246 {
 247         if (!valid_port(port))
 248                 return;
 249
 250         if (!gpio_is_valid(pdata->vbus_pin[port]))
 251                 return;
 252
 253         gpio_set_value(pdata->vbus_pin[port],
 254                        pdata->vbus_pin_active_low[port] ^ enable);
 255 }
 256
 257 static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
 258 {
 259         if (!valid_port(port))
 260                 return -EINVAL;
 261
 262         if (!gpio_is_valid(pdata->vbus_pin[port]))
 263                 return -EINVAL;
 264
 265         return gpio_get_value(pdata->vbus_pin[port]) ^
 266                 pdata->vbus_pin_active_low[port];
 267 }
 268
 269 /*
 270  * Update the status data from the hub with the over-current indicator change.
 271  */
 272 static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf)
 273 {
 274         struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
 275         int length = ohci_hub_status_data(hcd, buf);
 276         int port;
 277
 278         at91_for_each_port(port) {
 279                 if (pdata->overcurrent_changed[port]) {
 280                         if (!length)
 281                                 length = 1;
 282                         buf[0] |= 1 << (port + 1);
 283                 }
 284         }
 285
 286         return length;
 287 }
 288
 289 /*
 290  * Look at the control requests to the root hub and see if we need to override.
 291  */
 292 static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 293                                  u16 wIndex, char *buf, u16 wLength)
 294 {
 295         struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
 296         struct usb_hub_descriptor *desc;
 297         int ret = -EINVAL;
 298         u32 *data = (u32 *)buf;
 299
 300         dev_dbg(hcd->self.controller,
 301                 "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
 302                 hcd, typeReq, wValue, wIndex, buf, wLength);
 303
 304         wIndex--;
 305
 306         switch (typeReq) {
 307         case SetPortFeature:
 308                 if (wValue == USB_PORT_FEAT_POWER) {
 309                         dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
 310                         if (valid_port(wIndex)) {
 311                                 ohci_at91_usb_set_power(pdata, wIndex, 1);
 312                                 ret = 0;
 313                         }
 314
 315                         goto out;
 316                 }
 317                 break;
 318
 319         case ClearPortFeature:
 320                 switch (wValue) {
 321                 case USB_PORT_FEAT_C_OVER_CURRENT:
 322                         dev_dbg(hcd->self.controller,
 323                                 "ClearPortFeature: C_OVER_CURRENT\n");
 324
 325                         if (valid_port(wIndex)) {
 326                                 pdata->overcurrent_changed[wIndex] = 0;
 327                                 pdata->overcurrent_status[wIndex] = 0;
 328                         }
 329
 330                         goto out;
 331
 332                 case USB_PORT_FEAT_OVER_CURRENT:
 333                         dev_dbg(hcd->self.controller,
 334                                 "ClearPortFeature: OVER_CURRENT\n");
 335
 336                         if (valid_port(wIndex))
 337                                 pdata->overcurrent_status[wIndex] = 0;
 338
 339                         goto out;
 340
 341                 case USB_PORT_FEAT_POWER:
 342                         dev_dbg(hcd->self.controller,
 343                                 "ClearPortFeature: POWER\n");
 344
 345                         if (valid_port(wIndex)) {
 346                                 ohci_at91_usb_set_power(pdata, wIndex, 0);
 347                                 return 0;
 348                         }
 349                 }
 350                 break;
 351         }
 352
 353         ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength);
 354         if (ret)
 355                 goto out;
 356
 357         switch (typeReq) {
 358         case GetHubDescriptor:
 359
 360                 /* update the hub's descriptor */
 361
 362                 desc = (struct usb_hub_descriptor *)buf;
 363
 364                 dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
 365                         desc->wHubCharacteristics);
 366
 367                 /* remove the old configurations for power-switching, and
 368                  * over-current protection, and insert our new configuration
 369                  */
 370
 371                 desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
 372                 desc->wHubCharacteristics |= cpu_to_le16(0x0001);
 373
 374                 if (pdata->overcurrent_supported) {
 375                         desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);
 376                         desc->wHubCharacteristics |=  cpu_to_le16(0x0008|0x0001);
 377                 }
 378
 379                 dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
 380                         desc->wHubCharacteristics);
 381
 382                 return ret;
 383
 384         case GetPortStatus:
 385                 /* check port status */
 386
 387                 dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
 388
 389                 if (valid_port(wIndex)) {
 390                         if (!ohci_at91_usb_get_power(pdata, wIndex))
 391                                 *data &= ~cpu_to_le32(RH_PS_PPS);
 392
 393                         if (pdata->overcurrent_changed[wIndex])
 394                                 *data |= cpu_to_le32(RH_PS_OCIC);
 395
 396                         if (pdata->overcurrent_status[wIndex])
 397                                 *data |= cpu_to_le32(RH_PS_POCI);
 398                 }
 399         }
 400
 401  out:
 402         return ret;
 403 }
 404
 405 /*-------------------------------------------------------------------------*/
 406
 407 static const struct hc_driver ohci_at91_hc_driver = {
 408         .description =          hcd_name,
 409         .product_desc =         "AT91 OHCI",
 410         .hcd_priv_size =        sizeof(struct ohci_hcd),
 411
 412         /*
 413          * generic hardware linkage
 414          */
 415         .irq =                  ohci_irq,
 416         .flags =                HCD_USB11 | HCD_MEMORY,
 417
 418         /*
 419          * basic lifecycle operations
 420          */
 421         .start =                ohci_at91_start,
 422         .stop =                 ohci_stop,
 423         .shutdown =             ohci_shutdown,
 424
 425         /*
 426          * managing i/o requests and associated device resources
 427          */
 428         .urb_enqueue =          ohci_urb_enqueue,
 429         .urb_dequeue =          ohci_urb_dequeue,
 430         .endpoint_disable =     ohci_endpoint_disable,
 431
 432         /*
 433          * scheduling support
 434          */
 435         .get_frame_number =     ohci_get_frame,
 436
 437         /*
 438          * root hub support
 439          */
 440         .hub_status_data =      ohci_at91_hub_status_data,
 441         .hub_control =          ohci_at91_hub_control,
 442 #ifdef CONFIG_PM
 443         .bus_suspend =          ohci_bus_suspend,
 444         .bus_resume =           ohci_bus_resume,
 445 #endif
 446         .start_port_reset =     ohci_start_port_reset,
 447 };
 448
 449 /*-------------------------------------------------------------------------*/
 450
 451 static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
 452 {
 453         struct platform_device *pdev = data;
 454         struct at91_usbh_data *pdata = pdev->dev.platform_data;
 455         int val, gpio, port;
 456
 457         /* From the GPIO notifying the over-current situation, find
 458          * out the corresponding port */
 459         at91_for_each_port(port) {
 460                 if (gpio_to_irq(pdata->overcurrent_pin[port]) == irq) {
 461                         gpio = pdata->overcurrent_pin[port];
 462                         break;
 463                 }
 464         }
 465
 466         if (port == AT91_MAX_USBH_PORTS) {
 467                 dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
 468                 return IRQ_HANDLED;
 469         }
 470
 471         val = gpio_get_value(gpio);
 472
 473         /* When notified of an over-current situation, disable power
 474            on the corresponding port, and mark this port in
 475            over-current. */
 476         if (!val) {
 477                 ohci_at91_usb_set_power(pdata, port, 0);
 478                 pdata->overcurrent_status[port]  = 1;
 479                 pdata->overcurrent_changed[port] = 1;
 480         }
 481
 482         dev_dbg(& pdev->dev, "overcurrent situation %s\n",
 483                 val ? "exited" : "notified");
 484
 485         return IRQ_HANDLED;
 486 }
 487
 488 #ifdef CONFIG_OF
 489 static const struct of_device_id at91_ohci_dt_ids[] = {
 490         { .compatible = "atmel,at91rm9200-ohci" },
 491         { /* sentinel */ }
 492 };
 493
 494 MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids);
 495
 496 static u64 at91_ohci_dma_mask = DMA_BIT_MASK(32);
 497
 498 static int __devinit ohci_at91_of_init(struct platform_device *pdev)
 499 {
 500         struct device_node *np = pdev->dev.of_node;
 501         int i, gpio;
 502         enum of_gpio_flags flags;
 503         struct at91_usbh_data   *pdata;
 504         u32 ports;
 505
 506         if (!np)
 507                 return 0;
 508
 509         /* Right now device-tree probed devices don't get dma_mask set.
 510          * Since shared usb code relies on it, set it here for now.
 511          * Once we have dma capability bindings this can go away.
 512          */
 513         if (!pdev->dev.dma_mask)
 514                 pdev->dev.dma_mask = &at91_ohci_dma_mask;
 515
 516         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 517         if (!pdata)
 518                 return -ENOMEM;
 519
 520         if (!of_property_read_u32(np, "num-ports", &ports))
 521                 pdata->ports = ports;
 522
 523         at91_for_each_port(i) {
 524                 gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags);
 525                 pdata->vbus_pin[i] = gpio;
 526                 if (!gpio_is_valid(gpio))
 527                         continue;
 528                 pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW;
 529         }
 530
 531         at91_for_each_port(i)
 532                 pdata->overcurrent_pin[i] =
 533                         of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags);
 534
 535         pdev->dev.platform_data = pdata;
 536
 537         return 0;
 538 }
 539 #else
 540 static int __devinit ohci_at91_of_init(struct platform_device *pdev)
 541 {
 542         return 0;
 543 }
 544 #endif
 545
 546 /*-------------------------------------------------------------------------*/
 547
 548 static int __devinit ohci_hcd_at91_drv_probe(struct platform_device *pdev)
 549 {
 550         struct at91_usbh_data   *pdata;
 551         int                     i;
 552         int                     gpio;
 553         int                     ret;
 554
 555         ret = ohci_at91_of_init(pdev);
 556         if (ret)
 557                 return ret;
 558
 559         pdata = pdev->dev.platform_data;
 560
 561         if (pdata) {
 562                 at91_for_each_port(i) {
 563                         if (!gpio_is_valid(pdata->vbus_pin[i]))
 564                                 continue;
 565                         gpio = pdata->vbus_pin[i];
 566
 567                         ret = gpio_request(gpio, "ohci_vbus");
 568                         if (ret) {
 569                                 dev_err(&pdev->dev,
 570                                         "can't request vbus gpio %d\n", gpio);
 571                                 continue;
 572                         }
 573                         ret = gpio_direction_output(gpio,
 574                                                 !pdata->vbus_pin_active_low[i]);
 575                         if (ret) {
 576                                 dev_err(&pdev->dev,
 577                                         "can't put vbus gpio %d as output %d\n",
 578                                         gpio, !pdata->vbus_pin_active_low[i]);
 579                                 gpio_free(gpio);
 580                                 continue;
 581                         }
 582
 583                         ohci_at91_usb_set_power(pdata, i, 1);
 584                 }
 585
 586                 at91_for_each_port(i) {
 587                         if (!gpio_is_valid(pdata->overcurrent_pin[i]))
 588                                 continue;
 589                         gpio = pdata->overcurrent_pin[i];
 590
 591                         ret = gpio_request(gpio, "ohci_overcurrent");
 592                         if (ret) {
 593                                 dev_err(&pdev->dev,
 594                                         "can't request overcurrent gpio %d\n",
 595                                         gpio);
 596                                 continue;
 597                         }
 598
 599                         ret = gpio_direction_input(gpio);
 600                         if (ret) {
 601                                 dev_err(&pdev->dev,
 602                                         "can't configure overcurrent gpio %d as input\n",
 603                                         gpio);
 604                                 gpio_free(gpio);
 605                                 continue;
 606                         }
 607
 608                         ret = request_irq(gpio_to_irq(gpio),
 609                                           ohci_hcd_at91_overcurrent_irq,
 610                                           IRQF_SHARED, "ohci_overcurrent", pdev);
 611                         if (ret) {
 612                                 gpio_free(gpio);
 613                                 dev_err(&pdev->dev,
 614                                         "can't get gpio IRQ for overcurrent\n");
 615                         }
 616                 }
 617         }
 618
 619         device_init_wakeup(&pdev->dev, 1);
 620         return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
 621 }
 622
 623 static int __devexit ohci_hcd_at91_drv_remove(struct platform_device *pdev)
 624 {
 625         struct at91_usbh_data   *pdata = pdev->dev.platform_data;
 626         int                     i;
 627
 628         if (pdata) {
 629                 at91_for_each_port(i) {
 630                         if (!gpio_is_valid(pdata->vbus_pin[i]))
 631                                 continue;
 632                         ohci_at91_usb_set_power(pdata, i, 0);
 633                         gpio_free(pdata->vbus_pin[i]);
 634                 }
 635
 636                 at91_for_each_port(i) {
 637                         if (!gpio_is_valid(pdata->overcurrent_pin[i]))
 638                                 continue;
 639                         free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev);
 640                         gpio_free(pdata->overcurrent_pin[i]);
 641                 }
 642         }
 643
 644         device_init_wakeup(&pdev->dev, 0);
 645         usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
 646         return 0;
 647 }
 648
 649 #ifdef CONFIG_PM
 650
 651 static int
 652 ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg)
 653 {
 654         struct usb_hcd  *hcd = platform_get_drvdata(pdev);
 655         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 656
 657         if (device_may_wakeup(&pdev->dev))
 658                 enable_irq_wake(hcd->irq);
 659
 660         /*
 661          * The integrated transceivers seem unable to notice disconnect,
 662          * reconnect, or wakeup without the 48 MHz clock active.  so for
 663          * correctness, always discard connection state (using reset).
 664          *
 665          * REVISIT: some boards will be able to turn VBUS off...
 666          */
 667         if (at91_suspend_entering_slow_clock()) {
 668                 ohci_usb_reset (ohci);
 669                 /* flush the writes */
 670                 (void) ohci_readl (ohci, &ohci->regs->control);
 671                 at91_stop_clock();
 672         }
 673
 674         return 0;
 675 }
 676
 677 static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
 678 {
 679         struct usb_hcd  *hcd = platform_get_drvdata(pdev);
 680
 681         if (device_may_wakeup(&pdev->dev))
 682                 disable_irq_wake(hcd->irq);
 683
 684         if (!clocked)
 685                 at91_start_clock();
 686
 687         ohci_finish_controller_resume(hcd);
 688         return 0;
 689 }
 690 #else
 691 #define ohci_hcd_at91_drv_suspend NULL
 692 #define ohci_hcd_at91_drv_resume  NULL
 693 #endif
 694
 695 MODULE_ALIAS("platform:at91_ohci");
 696
 697 static struct platform_driver ohci_hcd_at91_driver = {
 698         .probe          = ohci_hcd_at91_drv_probe,
 699         .remove         = __devexit_p(ohci_hcd_at91_drv_remove),
 700         .shutdown       = usb_hcd_platform_shutdown,
 701         .suspend        = ohci_hcd_at91_drv_suspend,
 702         .resume         = ohci_hcd_at91_drv_resume,
 703         .driver         = {
 704                 .name   = "at91_ohci",
 705                 .owner  = THIS_MODULE,
 706                 .of_match_table = of_match_ptr(at91_ohci_dt_ids),
 707         },
 708 };