drivers/usb/musb/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  * The Inventra Controller Driver for Linux is free software; you
  11  * can redistribute it and/or modify it under the terms of the GNU
  12  * General Public License version 2 as published by the Free Software
  13  * Foundation.
  14  *
  15  * The Inventra Controller Driver for Linux is distributed in
  16  * the hope that it will be useful, but WITHOUT ANY WARRANTY;
  17  * without even the implied warranty of MERCHANTABILITY or
  18  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  19  * License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with The Inventra Controller Driver for Linux ; if not,
  23  * write to the Free Software Foundation, Inc., 59 Temple Place,
  24  * Suite 330, Boston, MA  02111-1307  USA
  25  *
  26  */
  27 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/sched.h>
  30 #include <linux/init.h>
  31 #include <linux/list.h>
  32 #include <linux/io.h>
  33 #include <linux/of.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/pm_runtime.h>
  37 #include <linux/err.h>
  38 #include <linux/delay.h>
  39 #include <linux/usb/musb-omap.h>
  40 #include <linux/usb/omap_control_usb.h>
  41
  42 #include "musb_core.h"
  43 #include "omap2430.h"
  44
  45 struct omap2430_glue {
  46         struct device           *dev;
  47         struct platform_device  *musb;
  48         enum omap_musb_vbus_id_status status;
  49         struct work_struct      omap_musb_mailbox_work;
  50         struct device           *control_otghs;
  51 };
  52 #define glue_to_musb(g)         platform_get_drvdata(g->musb)
  53
  54 struct omap2430_glue            *_glue;
  55
  56 static struct timer_list musb_idle_timer;
  57
  58 static void musb_do_idle(unsigned long _musb)
  59 {
  60         struct musb     *musb = (void *)_musb;
  61         unsigned long   flags;
  62         u8      power;
  63         u8      devctl;
  64
  65         spin_lock_irqsave(&musb->lock, flags);
  66
  67         switch (musb->xceiv->state) {
  68         case OTG_STATE_A_WAIT_BCON:
  69
  70                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
  71                 if (devctl & MUSB_DEVCTL_BDEVICE) {
  72                         musb->xceiv->state = OTG_STATE_B_IDLE;
  73                         MUSB_DEV_MODE(musb);
  74                 } else {
  75                         musb->xceiv->state = OTG_STATE_A_IDLE;
  76                         MUSB_HST_MODE(musb);
  77                 }
  78                 break;
  79         case OTG_STATE_A_SUSPEND:
  80                 /* finish RESUME signaling? */
  81                 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
  82                         power = musb_readb(musb->mregs, MUSB_POWER);
  83                         power &= ~MUSB_POWER_RESUME;
  84                         dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
  85                         musb_writeb(musb->mregs, MUSB_POWER, power);
  86                         musb->is_active = 1;
  87                         musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
  88                                                 | MUSB_PORT_STAT_RESUME);
  89                         musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
  90                         usb_hcd_poll_rh_status(musb_to_hcd(musb));
  91                         /* NOTE: it might really be A_WAIT_BCON ... */
  92                         musb->xceiv->state = OTG_STATE_A_HOST;
  93                 }
  94                 break;
  95         case OTG_STATE_A_HOST:
  96                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
  97                 if (devctl &  MUSB_DEVCTL_BDEVICE)
  98                         musb->xceiv->state = OTG_STATE_B_IDLE;
  99                 else
 100                         musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
 101         default:
 102                 break;
 103         }
 104         spin_unlock_irqrestore(&musb->lock, flags);
 105 }
 106
 107
 108 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
 109 {
 110         unsigned long           default_timeout = jiffies + msecs_to_jiffies(3);
 111         static unsigned long    last_timer;
 112
 113         if (timeout == 0)
 114                 timeout = default_timeout;
 115
 116         /* Never idle if active, or when VBUS timeout is not set as host */
 117         if (musb->is_active || ((musb->a_wait_bcon == 0)
 118                         && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
 119                 dev_dbg(musb->controller, "%s active, deleting timer\n",
 120                         otg_state_string(musb->xceiv->state));
 121                 del_timer(&musb_idle_timer);
 122                 last_timer = jiffies;
 123                 return;
 124         }
 125
 126         if (time_after(last_timer, timeout)) {
 127                 if (!timer_pending(&musb_idle_timer))
 128                         last_timer = timeout;
 129                 else {
 130                         dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
 131                         return;
 132                 }
 133         }
 134         last_timer = timeout;
 135
 136         dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
 137                 otg_state_string(musb->xceiv->state),
 138                 (unsigned long)jiffies_to_msecs(timeout - jiffies));
 139         mod_timer(&musb_idle_timer, timeout);
 140 }
 141
 142 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
 143 {
 144         struct usb_otg  *otg = musb->xceiv->otg;
 145         u8              devctl;
 146         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 147         /* HDRC controls CPEN, but beware current surges during device
 148          * connect.  They can trigger transient overcurrent conditions
 149          * that must be ignored.
 150          */
 151
 152         devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 153
 154         if (is_on) {
 155                 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
 156                         int loops = 100;
 157                         /* start the session */
 158                         devctl |= MUSB_DEVCTL_SESSION;
 159                         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 160                         /*
 161                          * Wait for the musb to set as A device to enable the
 162                          * VBUS
 163                          */
 164                         while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
 165
 166                                 mdelay(5);
 167                                 cpu_relax();
 168
 169                                 if (time_after(jiffies, timeout)
 170                                     || loops-- <= 0) {
 171                                         dev_err(musb->controller,
 172                                         "configured as A device timeout");
 173                                         break;
 174                                 }
 175                         }
 176
 177                         if (otg->set_vbus)
 178                                 otg_set_vbus(otg, 1);
 179                 } else {
 180                         musb->is_active = 1;
 181                         otg->default_a = 1;
 182                         musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 183                         devctl |= MUSB_DEVCTL_SESSION;
 184                         MUSB_HST_MODE(musb);
 185                 }
 186         } else {
 187                 musb->is_active = 0;
 188
 189                 /* NOTE:  we're skipping A_WAIT_VFALL -> A_IDLE and
 190                  * jumping right to B_IDLE...
 191                  */
 192
 193                 otg->default_a = 0;
 194                 musb->xceiv->state = OTG_STATE_B_IDLE;
 195                 devctl &= ~MUSB_DEVCTL_SESSION;
 196
 197                 MUSB_DEV_MODE(musb);
 198         }
 199         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 200
 201         dev_dbg(musb->controller, "VBUS %s, devctl %02x "
 202                 /* otg %3x conf %08x prcm %08x */ "\n",
 203                 otg_state_string(musb->xceiv->state),
 204                 musb_readb(musb->mregs, MUSB_DEVCTL));
 205 }
 206
 207 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
 208 {
 209         u8      devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 210
 211         devctl |= MUSB_DEVCTL_SESSION;
 212         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 213
 214         return 0;
 215 }
 216
 217 static inline void omap2430_low_level_exit(struct musb *musb)
 218 {
 219         u32 l;
 220
 221         /* in any role */
 222         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
 223         l |= ENABLEFORCE;       /* enable MSTANDBY */
 224         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
 225 }
 226
 227 static inline void omap2430_low_level_init(struct musb *musb)
 228 {
 229         u32 l;
 230
 231         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
 232         l &= ~ENABLEFORCE;      /* disable MSTANDBY */
 233         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
 234 }
 235
 236 void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
 237 {
 238         struct omap2430_glue    *glue = _glue;
 239         struct musb             *musb = glue_to_musb(glue);
 240
 241         glue->status = status;
 242         if (!musb) {
 243                 dev_err(glue->dev, "musb core is not yet ready\n");
 244                 return;
 245         }
 246
 247         schedule_work(&glue->omap_musb_mailbox_work);
 248 }
 249 EXPORT_SYMBOL_GPL(omap_musb_mailbox);
 250
 251 static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 252 {
 253         struct musb *musb = glue_to_musb(glue);
 254         struct device *dev = musb->controller;
 255         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 256         struct omap_musb_board_data *data = pdata->board_data;
 257         struct usb_otg *otg = musb->xceiv->otg;
 258
 259         switch (glue->status) {
 260         case OMAP_MUSB_ID_GROUND:
 261                 dev_dbg(dev, "ID GND\n");
 262
 263                 otg->default_a = true;
 264                 musb->xceiv->state = OTG_STATE_A_IDLE;
 265                 musb->xceiv->last_event = USB_EVENT_ID;
 266                 if (musb->gadget_driver) {
 267                         pm_runtime_get_sync(dev);
 268                         omap_control_usb_set_mode(glue->control_otghs,
 269                                 USB_MODE_HOST);
 270                         omap2430_musb_set_vbus(musb, 1);
 271                 }
 272                 break;
 273
 274         case OMAP_MUSB_VBUS_VALID:
 275                 dev_dbg(dev, "VBUS Connect\n");
 276
 277                 otg->default_a = false;
 278                 musb->xceiv->state = OTG_STATE_B_IDLE;
 279                 musb->xceiv->last_event = USB_EVENT_VBUS;
 280                 if (musb->gadget_driver)
 281                         pm_runtime_get_sync(dev);
 282                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
 283                 break;
 284
 285         case OMAP_MUSB_ID_FLOAT:
 286         case OMAP_MUSB_VBUS_OFF:
 287                 dev_dbg(dev, "VBUS Disconnect\n");
 288
 289                 musb->xceiv->last_event = USB_EVENT_NONE;
 290                 if (musb->gadget_driver) {
 291                         pm_runtime_mark_last_busy(dev);
 292                         pm_runtime_put_autosuspend(dev);
 293                 }
 294
 295                 if (data->interface_type == MUSB_INTERFACE_UTMI) {
 296                         if (musb->xceiv->otg->set_vbus)
 297                                 otg_set_vbus(musb->xceiv->otg, 0);
 298                 }
 299                 omap_control_usb_set_mode(glue->control_otghs,
 300                         USB_MODE_DISCONNECT);
 301                 break;
 302         default:
 303                 dev_dbg(dev, "ID float\n");
 304         }
 305 }
 306
 307
 308 static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
 309 {
 310         struct omap2430_glue *glue = container_of(mailbox_work,
 311                                 struct omap2430_glue, omap_musb_mailbox_work);
 312         omap_musb_set_mailbox(glue);
 313 }
 314
 315 static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
 316 {
 317         unsigned long   flags;
 318         irqreturn_t     retval = IRQ_NONE;
 319         struct musb     *musb = __hci;
 320
 321         spin_lock_irqsave(&musb->lock, flags);
 322
 323         musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
 324         musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
 325         musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
 326
 327         if (musb->int_usb || musb->int_tx || musb->int_rx)
 328                 retval = musb_interrupt(musb);
 329
 330         spin_unlock_irqrestore(&musb->lock, flags);
 331
 332         return retval;
 333 }
 334
 335 static int omap2430_musb_init(struct musb *musb)
 336 {
 337         u32 l;
 338         int status = 0;
 339         struct device *dev = musb->controller;
 340         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 341         struct musb_hdrc_platform_data *plat = dev->platform_data;
 342         struct omap_musb_board_data *data = plat->board_data;
 343
 344         /* We require some kind of external transceiver, hooked
 345          * up through ULPI.  TWL4030-family PMICs include one,
 346          * which needs a driver, drivers aren't always needed.
 347          */
 348         if (dev->parent->of_node)
 349                 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent,
 350                     "usb-phy", 0);
 351         else
 352                 musb->xceiv = devm_usb_get_phy_dev(dev, 0);
 353
 354         if (IS_ERR_OR_NULL(musb->xceiv)) {
 355                 pr_err("HS USB OTG: no transceiver configured\n");
 356                 return -ENODEV;
 357         }
 358
 359         musb->isr = omap2430_musb_interrupt;
 360
 361         status = pm_runtime_get_sync(dev);
 362         if (status < 0) {
 363                 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
 364                 goto err1;
 365         }
 366
 367         l = musb_readl(musb->mregs, OTG_INTERFSEL);
 368
 369         if (data->interface_type == MUSB_INTERFACE_UTMI) {
 370                 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
 371                 l &= ~ULPI_12PIN;       /* Disable ULPI */
 372                 l |= UTMI_8BIT;         /* Enable UTMI  */
 373         } else {
 374                 l |= ULPI_12PIN;
 375         }
 376
 377         musb_writel(musb->mregs, OTG_INTERFSEL, l);
 378
 379         pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
 380                         "sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
 381                         musb_readl(musb->mregs, OTG_REVISION),
 382                         musb_readl(musb->mregs, OTG_SYSCONFIG),
 383                         musb_readl(musb->mregs, OTG_SYSSTATUS),
 384                         musb_readl(musb->mregs, OTG_INTERFSEL),
 385                         musb_readl(musb->mregs, OTG_SIMENABLE));
 386
 387         setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
 388
 389         if (glue->status != OMAP_MUSB_UNKNOWN)
 390                 omap_musb_set_mailbox(glue);
 391
 392         pm_runtime_put_noidle(musb->controller);
 393         return 0;
 394
 395 err1:
 396         return status;
 397 }
 398
 399 static void omap2430_musb_enable(struct musb *musb)
 400 {
 401         u8              devctl;
 402         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 403         struct device *dev = musb->controller;
 404         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 405         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 406         struct omap_musb_board_data *data = pdata->board_data;
 407
 408         switch (glue->status) {
 409
 410         case OMAP_MUSB_ID_GROUND:
 411                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
 412                 if (data->interface_type != MUSB_INTERFACE_UTMI)
 413                         break;
 414                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 415                 /* start the session */
 416                 devctl |= MUSB_DEVCTL_SESSION;
 417                 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 418                 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
 419                                 MUSB_DEVCTL_BDEVICE) {
 420                         cpu_relax();
 421
 422                         if (time_after(jiffies, timeout)) {
 423                                 dev_err(dev, "configured as A device timeout");
 424                                 break;
 425                         }
 426                 }
 427                 break;
 428
 429         case OMAP_MUSB_VBUS_VALID:
 430                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
 431                 break;
 432
 433         default:
 434                 break;
 435         }
 436 }
 437
 438 static void omap2430_musb_disable(struct musb *musb)
 439 {
 440         struct device *dev = musb->controller;
 441         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 442
 443         if (glue->status != OMAP_MUSB_UNKNOWN)
 444                 omap_control_usb_set_mode(glue->control_otghs,
 445                         USB_MODE_DISCONNECT);
 446 }
 447
 448 static int omap2430_musb_exit(struct musb *musb)
 449 {
 450         del_timer_sync(&musb_idle_timer);
 451
 452         omap2430_low_level_exit(musb);
 453
 454         return 0;
 455 }
 456
 457 static const struct musb_platform_ops omap2430_ops = {
 458         .init           = omap2430_musb_init,
 459         .exit           = omap2430_musb_exit,
 460
 461         .set_mode       = omap2430_musb_set_mode,
 462         .try_idle       = omap2430_musb_try_idle,
 463
 464         .set_vbus       = omap2430_musb_set_vbus,
 465
 466         .enable         = omap2430_musb_enable,
 467         .disable        = omap2430_musb_disable,
 468 };
 469
 470 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
 471
 472 static int omap2430_probe(struct platform_device *pdev)
 473 {
 474         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
 475         struct omap_musb_board_data     *data;
 476         struct platform_device          *musb;
 477         struct omap2430_glue            *glue;
 478         struct device_node              *np = pdev->dev.of_node;
 479         struct musb_hdrc_config         *config;
 480         int                             ret = -ENOMEM;
 481
 482         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
 483         if (!glue) {
 484                 dev_err(&pdev->dev, "failed to allocate glue context\n");
 485                 goto err0;
 486         }
 487
 488         musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
 489         if (!musb) {
 490                 dev_err(&pdev->dev, "failed to allocate musb device\n");
 491                 goto err0;
 492         }
 493
 494         musb->dev.parent                = &pdev->dev;
 495         musb->dev.dma_mask              = &omap2430_dmamask;
 496         musb->dev.coherent_dma_mask     = omap2430_dmamask;
 497
 498         glue->dev                       = &pdev->dev;
 499         glue->musb                      = musb;
 500         glue->status                    = OMAP_MUSB_UNKNOWN;
 501
 502         if (np) {
 503                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 504                 if (!pdata) {
 505                         dev_err(&pdev->dev,
 506                                 "failed to allocate musb platfrom data\n");
 507                         ret = -ENOMEM;
 508                         goto err2;
 509                 }
 510
 511                 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 512                 if (!data) {
 513                         dev_err(&pdev->dev,
 514                                         "failed to allocate musb board data\n");
 515                         ret = -ENOMEM;
 516                         goto err2;
 517                 }
 518
 519                 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
 520                 if (!data) {
 521                         dev_err(&pdev->dev,
 522                                 "failed to allocate musb hdrc config\n");
 523                         goto err2;
 524                 }
 525
 526                 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
 527                 of_property_read_u32(np, "interface_type",
 528                                                 (u32 *)&data->interface_type);
 529                 of_property_read_u32(np, "num_eps", (u32 *)&config->num_eps);
 530                 of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits);
 531                 of_property_read_u32(np, "power", (u32 *)&pdata->power);
 532                 config->multipoint = of_property_read_bool(np, "multipoint");
 533                 pdata->has_mailbox = of_property_read_bool(np,
 534                     "ti,has-mailbox");
 535
 536                 pdata->board_data       = data;
 537                 pdata->config           = config;
 538         }
 539
 540         if (pdata->has_mailbox) {
 541                 glue->control_otghs = omap_get_control_dev();
 542                 if (IS_ERR(glue->control_otghs)) {
 543                         dev_vdbg(&pdev->dev, "Failed to get control device\n");
 544                         return -ENODEV;
 545                 }
 546         } else {
 547                 glue->control_otghs = ERR_PTR(-ENODEV);
 548         }
 549         pdata->platform_ops             = &omap2430_ops;
 550
 551         platform_set_drvdata(pdev, glue);
 552
 553         /*
 554          * REVISIT if we ever have two instances of the wrapper, we will be
 555          * in big trouble
 556          */
 557         _glue   = glue;
 558
 559         INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
 560
 561         ret = platform_device_add_resources(musb, pdev->resource,
 562                         pdev->num_resources);
 563         if (ret) {
 564                 dev_err(&pdev->dev, "failed to add resources\n");
 565                 goto err2;
 566         }
 567
 568         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
 569         if (ret) {
 570                 dev_err(&pdev->dev, "failed to add platform_data\n");
 571                 goto err2;
 572         }
 573
 574         pm_runtime_enable(&pdev->dev);
 575
 576         ret = platform_device_add(musb);
 577         if (ret) {
 578                 dev_err(&pdev->dev, "failed to register musb device\n");
 579                 goto err2;
 580         }
 581
 582         return 0;
 583
 584 err2:
 585         platform_device_put(musb);
 586
 587 err0:
 588         return ret;
 589 }
 590
 591 static int omap2430_remove(struct platform_device *pdev)
 592 {
 593         struct omap2430_glue            *glue = platform_get_drvdata(pdev);
 594
 595         cancel_work_sync(&glue->omap_musb_mailbox_work);
 596         platform_device_unregister(glue->musb);
 597
 598         return 0;
 599 }
 600
 601 #ifdef CONFIG_PM
 602
 603 static int omap2430_runtime_suspend(struct device *dev)
 604 {
 605         struct omap2430_glue            *glue = dev_get_drvdata(dev);
 606         struct musb                     *musb = glue_to_musb(glue);
 607
 608         if (musb) {
 609                 musb->context.otg_interfsel = musb_readl(musb->mregs,
 610                                 OTG_INTERFSEL);
 611
 612                 omap2430_low_level_exit(musb);
 613                 usb_phy_set_suspend(musb->xceiv, 1);
 614         }
 615
 616         return 0;
 617 }
 618
 619 static int omap2430_runtime_resume(struct device *dev)
 620 {
 621         struct omap2430_glue            *glue = dev_get_drvdata(dev);
 622         struct musb                     *musb = glue_to_musb(glue);
 623
 624         if (musb) {
 625                 omap2430_low_level_init(musb);
 626                 musb_writel(musb->mregs, OTG_INTERFSEL,
 627                                 musb->context.otg_interfsel);
 628
 629                 usb_phy_set_suspend(musb->xceiv, 0);
 630         }
 631
 632         return 0;
 633 }
 634
 635 static struct dev_pm_ops omap2430_pm_ops = {
 636         .runtime_suspend = omap2430_runtime_suspend,
 637         .runtime_resume = omap2430_runtime_resume,
 638 };
 639
 640 #define DEV_PM_OPS      (&omap2430_pm_ops)
 641 #else
 642 #define DEV_PM_OPS      NULL
 643 #endif
 644
 645 #ifdef CONFIG_OF
 646 static const struct of_device_id omap2430_id_table[] = {
 647         {
 648                 .compatible = "ti,omap4-musb"
 649         },
 650         {
 651                 .compatible = "ti,omap3-musb"
 652         },
 653         {},
 654 };
 655 MODULE_DEVICE_TABLE(of, omap2430_id_table);
 656 #endif
 657
 658 static struct platform_driver omap2430_driver = {
 659         .probe          = omap2430_probe,
 660         .remove         = omap2430_remove,
 661         .driver         = {
 662                 .name   = "musb-omap2430",
 663                 .pm     = DEV_PM_OPS,
 664                 .of_match_table = of_match_ptr(omap2430_id_table),
 665         },
 666 };
 667
 668 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
 669 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 670 MODULE_LICENSE("GPL v2");
 671
 672 static int __init omap2430_init(void)
 673 {
 674         return platform_driver_register(&omap2430_driver);
 675 }
 676 subsys_initcall(omap2430_init);
 677
 678 static void __exit omap2430_exit(void)
 679 {
 680         platform_driver_unregister(&omap2430_driver);
 681 }
 682 module_exit(omap2430_exit);