git.sur5r.net Git - u-boot/blob - drivers/usb/musb-new/omap2430.c

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