drivers/usb/musb-new/omap2430.c

   1 /*
   2  * Copyright (C) 2005-2007 by Texas Instruments
   3  * Some code has been taken from tusb6010.c
   4  * Copyrights for that are attributable to:
   5  * Copyright (C) 2006 Nokia Corporation
   6  * Tony Lindgren <tony@atomide.com>
   7  *
   8  * This file is part of the Inventra Controller Driver for Linux.
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0
  11  */
  12 #ifndef __UBOOT__
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/sched.h>
  16 #include <linux/init.h>
  17 #include <linux/list.h>
  18 #include <linux/io.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/dma-mapping.h>
  21 #include <linux/pm_runtime.h>
  22 #include <linux/err.h>
  23 #include <linux/usb/musb-omap.h>
  24 #else
  25 #include <common.h>
  26 #include <asm/omap_common.h>
  27 #include <asm/omap_musb.h>
  28 #include <twl4030.h>
  29 #include <twl6030.h>
  30 #include "linux-compat.h"
  31 #endif
  32
  33 #include "musb_core.h"
  34 #include "omap2430.h"
  35
  36 #ifndef __UBOOT__
  37 struct omap2430_glue {
  38         struct device           *dev;
  39         struct platform_device  *musb;
  40         enum omap_musb_vbus_id_status status;
  41         struct work_struct      omap_musb_mailbox_work;
  42 };
  43 #define glue_to_musb(g)         platform_get_drvdata(g->musb)
  44
  45 struct omap2430_glue            *_glue;
  46
  47 static struct timer_list musb_idle_timer;
  48
  49 static void musb_do_idle(unsigned long _musb)
  50 {
  51         struct musb     *musb = (void *)_musb;
  52         unsigned long   flags;
  53         u8      power;
  54         u8      devctl;
  55
  56         spin_lock_irqsave(&musb->lock, flags);
  57
  58         switch (musb->xceiv->state) {
  59         case OTG_STATE_A_WAIT_BCON:
  60
  61                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
  62                 if (devctl & MUSB_DEVCTL_BDEVICE) {
  63                         musb->xceiv->state = OTG_STATE_B_IDLE;
  64                         MUSB_DEV_MODE(musb);
  65                 } else {
  66                         musb->xceiv->state = OTG_STATE_A_IDLE;
  67                         MUSB_HST_MODE(musb);
  68                 }
  69                 break;
  70         case OTG_STATE_A_SUSPEND:
  71                 /* finish RESUME signaling? */
  72                 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
  73                         power = musb_readb(musb->mregs, MUSB_POWER);
  74                         power &= ~MUSB_POWER_RESUME;
  75                         dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
  76                         musb_writeb(musb->mregs, MUSB_POWER, power);
  77                         musb->is_active = 1;
  78                         musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
  79                                                 | MUSB_PORT_STAT_RESUME);
  80                         musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
  81                         usb_hcd_poll_rh_status(musb_to_hcd(musb));
  82                         /* NOTE: it might really be A_WAIT_BCON ... */
  83                         musb->xceiv->state = OTG_STATE_A_HOST;
  84                 }
  85                 break;
  86         case OTG_STATE_A_HOST:
  87                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
  88                 if (devctl &  MUSB_DEVCTL_BDEVICE)
  89                         musb->xceiv->state = OTG_STATE_B_IDLE;
  90                 else
  91                         musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
  92         default:
  93                 break;
  94         }
  95         spin_unlock_irqrestore(&musb->lock, flags);
  96 }
  97
  98
  99 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
 100 {
 101         unsigned long           default_timeout = jiffies + msecs_to_jiffies(3);
 102         static unsigned long    last_timer;
 103
 104         if (timeout == 0)
 105                 timeout = default_timeout;
 106
 107         /* Never idle if active, or when VBUS timeout is not set as host */
 108         if (musb->is_active || ((musb->a_wait_bcon == 0)
 109                         && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
 110                 dev_dbg(musb->controller, "%s active, deleting timer\n",
 111                         otg_state_string(musb->xceiv->state));
 112                 del_timer(&musb_idle_timer);
 113                 last_timer = jiffies;
 114                 return;
 115         }
 116
 117         if (time_after(last_timer, timeout)) {
 118                 if (!timer_pending(&musb_idle_timer))
 119                         last_timer = timeout;
 120                 else {
 121                         dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
 122                         return;
 123                 }
 124         }
 125         last_timer = timeout;
 126
 127         dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
 128                 otg_state_string(musb->xceiv->state),
 129                 (unsigned long)jiffies_to_msecs(timeout - jiffies));
 130         mod_timer(&musb_idle_timer, timeout);
 131 }
 132
 133 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
 134 {
 135         struct usb_otg  *otg = musb->xceiv->otg;
 136         u8              devctl;
 137         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 138         int ret = 1;
 139         /* HDRC controls CPEN, but beware current surges during device
 140          * connect.  They can trigger transient overcurrent conditions
 141          * that must be ignored.
 142          */
 143
 144         devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 145
 146         if (is_on) {
 147                 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
 148                         /* start the session */
 149                         devctl |= MUSB_DEVCTL_SESSION;
 150                         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 151                         /*
 152                          * Wait for the musb to set as A device to enable the
 153                          * VBUS
 154                          */
 155                         while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
 156
 157                                 cpu_relax();
 158
 159                                 if (time_after(jiffies, timeout)) {
 160                                         dev_err(musb->controller,
 161                                         "configured as A device timeout");
 162                                         ret = -EINVAL;
 163                                         break;
 164                                 }
 165                         }
 166
 167                         if (ret && otg->set_vbus)
 168                                 otg_set_vbus(otg, 1);
 169                 } else {
 170                         musb->is_active = 1;
 171                         otg->default_a = 1;
 172                         musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 173                         devctl |= MUSB_DEVCTL_SESSION;
 174                         MUSB_HST_MODE(musb);
 175                 }
 176         } else {
 177                 musb->is_active = 0;
 178
 179                 /* NOTE:  we're skipping A_WAIT_VFALL -> A_IDLE and
 180                  * jumping right to B_IDLE...
 181                  */
 182
 183                 otg->default_a = 0;
 184                 musb->xceiv->state = OTG_STATE_B_IDLE;
 185                 devctl &= ~MUSB_DEVCTL_SESSION;
 186
 187                 MUSB_DEV_MODE(musb);
 188         }
 189         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 190
 191         dev_dbg(musb->controller, "VBUS %s, devctl %02x "
 192                 /* otg %3x conf %08x prcm %08x */ "\n",
 193                 otg_state_string(musb->xceiv->state),
 194                 musb_readb(musb->mregs, MUSB_DEVCTL));
 195 }
 196
 197 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
 198 {
 199         u8      devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 200
 201         devctl |= MUSB_DEVCTL_SESSION;
 202         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 203
 204         return 0;
 205 }
 206 #endif
 207
 208 static inline void omap2430_low_level_exit(struct musb *musb)
 209 {
 210         u32 l;
 211
 212         /* in any role */
 213         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
 214         l |= ENABLEFORCE;       /* enable MSTANDBY */
 215         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
 216 }
 217
 218 static inline void omap2430_low_level_init(struct musb *musb)
 219 {
 220         u32 l;
 221
 222         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
 223         l &= ~ENABLEFORCE;      /* disable MSTANDBY */
 224         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
 225 }
 226
 227 #ifndef __UBOOT__
 228 void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
 229 {
 230         struct omap2430_glue    *glue = _glue;
 231         struct musb             *musb = glue_to_musb(glue);
 232
 233         glue->status = status;
 234         if (!musb) {
 235                 dev_err(glue->dev, "musb core is not yet ready\n");
 236                 return;
 237         }
 238
 239         schedule_work(&glue->omap_musb_mailbox_work);
 240 }
 241 EXPORT_SYMBOL_GPL(omap_musb_mailbox);
 242
 243 static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 244 {
 245         struct musb *musb = glue_to_musb(glue);
 246         struct device *dev = musb->controller;
 247         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 248         struct omap_musb_board_data *data = pdata->board_data;
 249         struct usb_otg *otg = musb->xceiv->otg;
 250
 251         switch (glue->status) {
 252         case OMAP_MUSB_ID_GROUND:
 253                 dev_dbg(dev, "ID GND\n");
 254
 255                 otg->default_a = true;
 256                 musb->xceiv->state = OTG_STATE_A_IDLE;
 257                 musb->xceiv->last_event = USB_EVENT_ID;
 258                 if (!is_otg_enabled(musb) || musb->gadget_driver) {
 259                         pm_runtime_get_sync(dev);
 260                         usb_phy_init(musb->xceiv);
 261                         omap2430_musb_set_vbus(musb, 1);
 262                 }
 263                 break;
 264
 265         case OMAP_MUSB_VBUS_VALID:
 266                 dev_dbg(dev, "VBUS Connect\n");
 267
 268                 otg->default_a = false;
 269                 musb->xceiv->state = OTG_STATE_B_IDLE;
 270                 musb->xceiv->last_event = USB_EVENT_VBUS;
 271                 if (musb->gadget_driver)
 272                         pm_runtime_get_sync(dev);
 273                 usb_phy_init(musb->xceiv);
 274                 break;
 275
 276         case OMAP_MUSB_ID_FLOAT:
 277         case OMAP_MUSB_VBUS_OFF:
 278                 dev_dbg(dev, "VBUS Disconnect\n");
 279
 280                 musb->xceiv->last_event = USB_EVENT_NONE;
 281                 if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
 282                         if (musb->gadget_driver) {
 283                                 pm_runtime_mark_last_busy(dev);
 284                                 pm_runtime_put_autosuspend(dev);
 285                         }
 286
 287                 if (data->interface_type == MUSB_INTERFACE_UTMI) {
 288                         if (musb->xceiv->otg->set_vbus)
 289                                 otg_set_vbus(musb->xceiv->otg, 0);
 290                 }
 291                 usb_phy_shutdown(musb->xceiv);
 292                 break;
 293         default:
 294                 dev_dbg(dev, "ID float\n");
 295         }
 296 }
 297
 298
 299 static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
 300 {
 301         struct omap2430_glue *glue = container_of(mailbox_work,
 302                                 struct omap2430_glue, omap_musb_mailbox_work);
 303         omap_musb_set_mailbox(glue);
 304 }
 305 #endif
 306
 307 static int omap2430_musb_init(struct musb *musb)
 308 {
 309         u32 l;
 310         int status = 0;
 311         unsigned long int start;
 312 #ifndef __UBOOT__
 313         struct device *dev = musb->controller;
 314         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 315         struct musb_hdrc_platform_data *plat = dev->platform_data;
 316         struct omap_musb_board_data *data = plat->board_data;
 317 #else
 318         struct omap_musb_board_data *data =
 319                 (struct omap_musb_board_data *)musb->controller;
 320 #endif
 321
 322         /* Reset the controller */
 323         musb_writel(musb->mregs, OTG_SYSCONFIG, SOFTRST);
 324
 325         start = get_timer(0);
 326
 327         while (1) {
 328                 l = musb_readl(musb->mregs, OTG_SYSCONFIG);
 329                 if ((l & SOFTRST) == 0)
 330                         break;
 331
 332                 if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
 333                         dev_err(musb->controller, "MUSB reset is taking too long\n");
 334                         return -ENODEV;
 335                 }
 336         }
 337
 338 #ifndef __UBOOT__
 339         /* We require some kind of external transceiver, hooked
 340          * up through ULPI.  TWL4030-family PMICs include one,
 341          * which needs a driver, drivers aren't always needed.
 342          */
 343         musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
 344         if (IS_ERR_OR_NULL(musb->xceiv)) {
 345                 pr_err("HS USB OTG: no transceiver configured\n");
 346                 return -ENODEV;
 347         }
 348
 349         status = pm_runtime_get_sync(dev);
 350         if (status < 0) {
 351                 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
 352                 goto err1;
 353         }
 354 #endif
 355
 356         l = musb_readl(musb->mregs, OTG_INTERFSEL);
 357
 358         if (data->interface_type == MUSB_INTERFACE_UTMI) {
 359                 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
 360                 l &= ~ULPI_12PIN;       /* Disable ULPI */
 361                 l |= UTMI_8BIT;         /* Enable UTMI  */
 362         } else {
 363                 l |= ULPI_12PIN;
 364         }
 365
 366         musb_writel(musb->mregs, OTG_INTERFSEL, l);
 367
 368         pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
 369                         "sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
 370                         musb_readl(musb->mregs, OTG_REVISION),
 371                         musb_readl(musb->mregs, OTG_SYSCONFIG),
 372                         musb_readl(musb->mregs, OTG_SYSSTATUS),
 373                         musb_readl(musb->mregs, OTG_INTERFSEL),
 374                         musb_readl(musb->mregs, OTG_SIMENABLE));
 375
 376 #ifndef __UBOOT__
 377         setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
 378
 379         if (glue->status != OMAP_MUSB_UNKNOWN)
 380                 omap_musb_set_mailbox(glue);
 381
 382         pm_runtime_put_noidle(musb->controller);
 383 #endif
 384         return 0;
 385
 386 err1:
 387         return status;
 388 }
 389
 390 #ifndef __UBOOT__
 391 static void omap2430_musb_enable(struct musb *musb)
 392 #else
 393 static int omap2430_musb_enable(struct musb *musb)
 394 #endif
 395 {
 396 #ifndef __UBOOT__
 397         u8              devctl;
 398         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 399         struct device *dev = musb->controller;
 400         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 401         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 402         struct omap_musb_board_data *data = pdata->board_data;
 403
 404         switch (glue->status) {
 405
 406         case OMAP_MUSB_ID_GROUND:
 407                 usb_phy_init(musb->xceiv);
 408                 if (data->interface_type != MUSB_INTERFACE_UTMI)
 409                         break;
 410                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 411                 /* start the session */
 412                 devctl |= MUSB_DEVCTL_SESSION;
 413                 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 414                 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
 415                                 MUSB_DEVCTL_BDEVICE) {
 416                         cpu_relax();
 417
 418                         if (time_after(jiffies, timeout)) {
 419                                 dev_err(dev, "configured as A device timeout");
 420                                 break;
 421                         }
 422                 }
 423                 break;
 424
 425         case OMAP_MUSB_VBUS_VALID:
 426                 usb_phy_init(musb->xceiv);
 427                 break;
 428
 429         default:
 430                 break;
 431         }
 432 #else
 433 #ifdef CONFIG_TWL4030_USB
 434         if (twl4030_usb_ulpi_init()) {
 435                 serial_printf("ERROR: %s Could not initialize PHY\n",
 436                                 __PRETTY_FUNCTION__);
 437         }
 438 #endif
 439
 440 #ifdef CONFIG_TWL6030_POWER
 441         twl6030_usb_device_settings();
 442 #endif
 443
 444 #ifdef CONFIG_OMAP44XX
 445         u32 *usbotghs_control = (u32 *)((*ctrl)->control_usbotghs_ctrl);
 446         *usbotghs_control = USBOTGHS_CONTROL_AVALID |
 447                 USBOTGHS_CONTROL_VBUSVALID | USBOTGHS_CONTROL_IDDIG;
 448 #endif
 449
 450         return 0;
 451 #endif
 452 }
 453
 454 static void omap2430_musb_disable(struct musb *musb)
 455 {
 456 #ifndef __UBOOT__
 457         struct device *dev = musb->controller;
 458         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 459
 460         if (glue->status != OMAP_MUSB_UNKNOWN)
 461                 usb_phy_shutdown(musb->xceiv);
 462 #endif
 463 }
 464
 465 static int omap2430_musb_exit(struct musb *musb)
 466 {
 467         del_timer_sync(&musb_idle_timer);
 468
 469         omap2430_low_level_exit(musb);
 470
 471         return 0;
 472 }
 473
 474 #ifndef __UBOOT__
 475 static const struct musb_platform_ops omap2430_ops = {
 476 #else
 477 const struct musb_platform_ops omap2430_ops = {
 478 #endif
 479         .init           = omap2430_musb_init,
 480         .exit           = omap2430_musb_exit,
 481
 482 #ifndef __UBOOT__
 483         .set_mode       = omap2430_musb_set_mode,
 484         .try_idle       = omap2430_musb_try_idle,
 485
 486         .set_vbus       = omap2430_musb_set_vbus,
 487 #endif
 488
 489         .enable         = omap2430_musb_enable,
 490         .disable        = omap2430_musb_disable,
 491 };
 492
 493 #ifndef __UBOOT__
 494 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
 495
 496 static int __devinit omap2430_probe(struct platform_device *pdev)
 497 {
 498         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
 499         struct platform_device          *musb;
 500         struct omap2430_glue            *glue;
 501         int                             ret = -ENOMEM;
 502
 503         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
 504         if (!glue) {
 505                 dev_err(&pdev->dev, "failed to allocate glue context\n");
 506                 goto err0;
 507         }
 508
 509         musb = platform_device_alloc("musb-hdrc", -1);
 510         if (!musb) {
 511                 dev_err(&pdev->dev, "failed to allocate musb device\n");
 512                 goto err0;
 513         }
 514
 515         musb->dev.parent                = &pdev->dev;
 516         musb->dev.dma_mask              = &omap2430_dmamask;
 517         musb->dev.coherent_dma_mask     = omap2430_dmamask;
 518
 519         glue->dev                       = &pdev->dev;
 520         glue->musb                      = musb;
 521         glue->status                    = OMAP_MUSB_UNKNOWN;
 522
 523         pdata->platform_ops             = &omap2430_ops;
 524
 525         platform_set_drvdata(pdev, glue);
 526
 527         /*
 528          * REVISIT if we ever have two instances of the wrapper, we will be
 529          * in big trouble
 530          */
 531         _glue   = glue;
 532
 533         INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
 534
 535         ret = platform_device_add_resources(musb, pdev->resource,
 536                         pdev->num_resources);
 537         if (ret) {
 538                 dev_err(&pdev->dev, "failed to add resources\n");
 539                 goto err1;
 540         }
 541
 542         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
 543         if (ret) {
 544                 dev_err(&pdev->dev, "failed to add platform_data\n");
 545                 goto err1;
 546         }
 547
 548         pm_runtime_enable(&pdev->dev);
 549
 550         ret = platform_device_add(musb);
 551         if (ret) {
 552                 dev_err(&pdev->dev, "failed to register musb device\n");
 553                 goto err1;
 554         }
 555
 556         return 0;
 557
 558 err1:
 559         platform_device_put(musb);
 560
 561 err0:
 562         return ret;
 563 }
 564
 565 static int __devexit omap2430_remove(struct platform_device *pdev)
 566 {
 567         struct omap2430_glue            *glue = platform_get_drvdata(pdev);
 568
 569         cancel_work_sync(&glue->omap_musb_mailbox_work);
 570         platform_device_del(glue->musb);
 571         platform_device_put(glue->musb);
 572
 573         return 0;
 574 }
 575
 576 #ifdef CONFIG_PM
 577
 578 static int omap2430_runtime_suspend(struct device *dev)
 579 {
 580         struct omap2430_glue            *glue = dev_get_drvdata(dev);
 581         struct musb                     *musb = glue_to_musb(glue);
 582
 583         if (musb) {
 584                 musb->context.otg_interfsel = musb_readl(musb->mregs,
 585                                 OTG_INTERFSEL);
 586
 587                 omap2430_low_level_exit(musb);
 588                 usb_phy_set_suspend(musb->xceiv, 1);
 589         }
 590
 591         return 0;
 592 }
 593
 594 static int omap2430_runtime_resume(struct device *dev)
 595 {
 596         struct omap2430_glue            *glue = dev_get_drvdata(dev);
 597         struct musb                     *musb = glue_to_musb(glue);
 598
 599         if (musb) {
 600                 omap2430_low_level_init(musb);
 601                 musb_writel(musb->mregs, OTG_INTERFSEL,
 602                                 musb->context.otg_interfsel);
 603
 604                 usb_phy_set_suspend(musb->xceiv, 0);
 605         }
 606
 607         return 0;
 608 }
 609
 610 static struct dev_pm_ops omap2430_pm_ops = {
 611         .runtime_suspend = omap2430_runtime_suspend,
 612         .runtime_resume = omap2430_runtime_resume,
 613 };
 614
 615 #define DEV_PM_OPS      (&omap2430_pm_ops)
 616 #else
 617 #define DEV_PM_OPS      NULL
 618 #endif
 619
 620 static struct platform_driver omap2430_driver = {
 621         .probe          = omap2430_probe,
 622         .remove         = __devexit_p(omap2430_remove),
 623         .driver         = {
 624                 .name   = "musb-omap2430",
 625                 .pm     = DEV_PM_OPS,
 626         },
 627 };
 628
 629 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
 630 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 631 MODULE_LICENSE("GPL v2");
 632
 633 static int __init omap2430_init(void)
 634 {
 635         return platform_driver_register(&omap2430_driver);
 636 }
 637 subsys_initcall(omap2430_init);
 638
 639 static void __exit omap2430_exit(void)
 640 {
 641         platform_driver_unregister(&omap2430_driver);
 642 }
 643 module_exit(omap2430_exit);
 644 #endif