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 static 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
 240         if (!glue) {
 241                 pr_err("%s: musb core is not yet initialized\n", __func__);
 242                 return;
 243         }
 244         glue->status = status;
 245
 246         if (!glue_to_musb(glue)) {
 247                 pr_err("%s: musb core is not yet ready\n", __func__);
 248                 return;
 249         }
 250
 251         schedule_work(&glue->omap_musb_mailbox_work);
 252 }
 253 EXPORT_SYMBOL_GPL(omap_musb_mailbox);
 254
 255 static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 256 {
 257         struct musb *musb = glue_to_musb(glue);
 258         struct device *dev = musb->controller;
 259         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 260         struct omap_musb_board_data *data = pdata->board_data;
 261         struct usb_otg *otg = musb->xceiv->otg;
 262
 263         switch (glue->status) {
 264         case OMAP_MUSB_ID_GROUND:
 265                 dev_dbg(dev, "ID GND\n");
 266
 267                 otg->default_a = true;
 268                 musb->xceiv->state = OTG_STATE_A_IDLE;
 269                 musb->xceiv->last_event = USB_EVENT_ID;
 270                 if (musb->gadget_driver) {
 271                         pm_runtime_get_sync(dev);
 272                         omap_control_usb_set_mode(glue->control_otghs,
 273                                 USB_MODE_HOST);
 274                         omap2430_musb_set_vbus(musb, 1);
 275                 }
 276                 break;
 277
 278         case OMAP_MUSB_VBUS_VALID:
 279                 dev_dbg(dev, "VBUS Connect\n");
 280
 281                 otg->default_a = false;
 282                 musb->xceiv->state = OTG_STATE_B_IDLE;
 283                 musb->xceiv->last_event = USB_EVENT_VBUS;
 284                 if (musb->gadget_driver)
 285                         pm_runtime_get_sync(dev);
 286                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
 287                 break;
 288
 289         case OMAP_MUSB_ID_FLOAT:
 290         case OMAP_MUSB_VBUS_OFF:
 291                 dev_dbg(dev, "VBUS Disconnect\n");
 292
 293                 musb->xceiv->last_event = USB_EVENT_NONE;
 294                 if (musb->gadget_driver) {
 295                         pm_runtime_mark_last_busy(dev);
 296                         pm_runtime_put_autosuspend(dev);
 297                 }
 298
 299                 if (data->interface_type == MUSB_INTERFACE_UTMI) {
 300                         if (musb->xceiv->otg->set_vbus)
 301                                 otg_set_vbus(musb->xceiv->otg, 0);
 302                 }
 303                 omap_control_usb_set_mode(glue->control_otghs,
 304                         USB_MODE_DISCONNECT);
 305                 break;
 306         default:
 307                 dev_dbg(dev, "ID float\n");
 308         }
 309 }
 310
 311
 312 static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
 313 {
 314         struct omap2430_glue *glue = container_of(mailbox_work,
 315                                 struct omap2430_glue, omap_musb_mailbox_work);
 316         omap_musb_set_mailbox(glue);
 317 }
 318
 319 static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
 320 {
 321         unsigned long   flags;
 322         irqreturn_t     retval = IRQ_NONE;
 323         struct musb     *musb = __hci;
 324
 325         spin_lock_irqsave(&musb->lock, flags);
 326
 327         musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
 328         musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
 329         musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
 330
 331         if (musb->int_usb || musb->int_tx || musb->int_rx)
 332                 retval = musb_interrupt(musb);
 333
 334         spin_unlock_irqrestore(&musb->lock, flags);
 335
 336         return retval;
 337 }
 338
 339 static int omap2430_musb_init(struct musb *musb)
 340 {
 341         u32 l;
 342         int status = 0;
 343         struct device *dev = musb->controller;
 344         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 345         struct musb_hdrc_platform_data *plat = dev->platform_data;
 346         struct omap_musb_board_data *data = plat->board_data;
 347
 348         /* We require some kind of external transceiver, hooked
 349          * up through ULPI.  TWL4030-family PMICs include one,
 350          * which needs a driver, drivers aren't always needed.
 351          */
 352         if (dev->parent->of_node)
 353                 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent,
 354                     "usb-phy", 0);
 355         else
 356                 musb->xceiv = devm_usb_get_phy_dev(dev, 0);
 357
 358         if (IS_ERR_OR_NULL(musb->xceiv)) {
 359                 pr_err("HS USB OTG: no transceiver configured\n");
 360                 return -EPROBE_DEFER;
 361         }
 362
 363         musb->isr = omap2430_musb_interrupt;
 364
 365         status = pm_runtime_get_sync(dev);
 366         if (status < 0) {
 367                 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
 368                 goto err1;
 369         }
 370
 371         l = musb_readl(musb->mregs, OTG_INTERFSEL);
 372
 373         if (data->interface_type == MUSB_INTERFACE_UTMI) {
 374                 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
 375                 l &= ~ULPI_12PIN;       /* Disable ULPI */
 376                 l |= UTMI_8BIT;         /* Enable UTMI  */
 377         } else {
 378                 l |= ULPI_12PIN;
 379         }
 380
 381         musb_writel(musb->mregs, OTG_INTERFSEL, l);
 382
 383         pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
 384                         "sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
 385                         musb_readl(musb->mregs, OTG_REVISION),
 386                         musb_readl(musb->mregs, OTG_SYSCONFIG),
 387                         musb_readl(musb->mregs, OTG_SYSSTATUS),
 388                         musb_readl(musb->mregs, OTG_INTERFSEL),
 389                         musb_readl(musb->mregs, OTG_SIMENABLE));
 390
 391         setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
 392
 393         if (glue->status != OMAP_MUSB_UNKNOWN)
 394                 omap_musb_set_mailbox(glue);
 395
 396         pm_runtime_put_noidle(musb->controller);
 397         return 0;
 398
 399 err1:
 400         return status;
 401 }
 402
 403 static void omap2430_musb_enable(struct musb *musb)
 404 {
 405         u8              devctl;
 406         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 407         struct device *dev = musb->controller;
 408         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 409         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 410         struct omap_musb_board_data *data = pdata->board_data;
 411
 412         switch (glue->status) {
 413
 414         case OMAP_MUSB_ID_GROUND:
 415                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
 416                 if (data->interface_type != MUSB_INTERFACE_UTMI)
 417                         break;
 418                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 419                 /* start the session */
 420                 devctl |= MUSB_DEVCTL_SESSION;
 421                 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 422                 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
 423                                 MUSB_DEVCTL_BDEVICE) {
 424                         cpu_relax();
 425
 426                         if (time_after(jiffies, timeout)) {
 427                                 dev_err(dev, "configured as A device timeout");
 428                                 break;
 429                         }
 430                 }
 431                 break;
 432
 433         case OMAP_MUSB_VBUS_VALID:
 434                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
 435                 break;
 436
 437         default:
 438                 break;
 439         }
 440 }
 441
 442 static void omap2430_musb_disable(struct musb *musb)
 443 {
 444         struct device *dev = musb->controller;
 445         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 446
 447         if (glue->status != OMAP_MUSB_UNKNOWN)
 448                 omap_control_usb_set_mode(glue->control_otghs,
 449                         USB_MODE_DISCONNECT);
 450 }
 451
 452 static int omap2430_musb_exit(struct musb *musb)
 453 {
 454         del_timer_sync(&musb_idle_timer);
 455
 456         omap2430_low_level_exit(musb);
 457
 458         return 0;
 459 }
 460
 461 static const struct musb_platform_ops omap2430_ops = {
 462         .init           = omap2430_musb_init,
 463         .exit           = omap2430_musb_exit,
 464
 465         .set_mode       = omap2430_musb_set_mode,
 466         .try_idle       = omap2430_musb_try_idle,
 467
 468         .set_vbus       = omap2430_musb_set_vbus,
 469
 470         .enable         = omap2430_musb_enable,
 471         .disable        = omap2430_musb_disable,
 472 };
 473
 474 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
 475
 476 static int omap2430_probe(struct platform_device *pdev)
 477 {
 478         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
 479         struct omap_musb_board_data     *data;
 480         struct platform_device          *musb;
 481         struct omap2430_glue            *glue;
 482         struct device_node              *np = pdev->dev.of_node;
 483         struct musb_hdrc_config         *config;
 484         int                             ret = -ENOMEM;
 485
 486         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
 487         if (!glue) {
 488                 dev_err(&pdev->dev, "failed to allocate glue context\n");
 489                 goto err0;
 490         }
 491
 492         musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
 493         if (!musb) {
 494                 dev_err(&pdev->dev, "failed to allocate musb device\n");
 495                 goto err0;
 496         }
 497
 498         musb->dev.parent                = &pdev->dev;
 499         musb->dev.dma_mask              = &omap2430_dmamask;
 500         musb->dev.coherent_dma_mask     = omap2430_dmamask;
 501
 502         glue->dev                       = &pdev->dev;
 503         glue->musb                      = musb;
 504         glue->status                    = OMAP_MUSB_UNKNOWN;
 505
 506         if (np) {
 507                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 508                 if (!pdata) {
 509                         dev_err(&pdev->dev,
 510                                 "failed to allocate musb platfrom data\n");
 511                         goto err2;
 512                 }
 513
 514                 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 515                 if (!data) {
 516                         dev_err(&pdev->dev,
 517                                 "failed to allocate musb board data\n");
 518                         goto err2;
 519                 }
 520
 521                 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
 522                 if (!config) {
 523                         dev_err(&pdev->dev,
 524                                 "failed to allocate musb hdrc config\n");
 525                         goto err2;
 526                 }
 527
 528                 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
 529                 of_property_read_u32(np, "interface_type",
 530                                                 (u32 *)&data->interface_type);
 531                 of_property_read_u32(np, "num_eps", (u32 *)&config->num_eps);
 532                 of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits);
 533                 of_property_read_u32(np, "power", (u32 *)&pdata->power);
 534                 config->multipoint = of_property_read_bool(np, "multipoint");
 535                 pdata->has_mailbox = of_property_read_bool(np,
 536                     "ti,has-mailbox");
 537
 538                 pdata->board_data       = data;
 539                 pdata->config           = config;
 540         }
 541
 542         if (pdata->has_mailbox) {
 543                 glue->control_otghs = omap_get_control_dev();
 544                 if (IS_ERR(glue->control_otghs)) {
 545                         dev_vdbg(&pdev->dev, "Failed to get control device\n");
 546                         return -ENODEV;
 547                 }
 548         } else {
 549                 glue->control_otghs = ERR_PTR(-ENODEV);
 550         }
 551         pdata->platform_ops             = &omap2430_ops;
 552
 553         platform_set_drvdata(pdev, glue);
 554
 555         /*
 556          * REVISIT if we ever have two instances of the wrapper, we will be
 557          * in big trouble
 558          */
 559         _glue   = glue;
 560
 561         INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
 562
 563         ret = platform_device_add_resources(musb, pdev->resource,
 564                         pdev->num_resources);
 565         if (ret) {
 566                 dev_err(&pdev->dev, "failed to add resources\n");
 567                 goto err2;
 568         }
 569
 570         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
 571         if (ret) {
 572                 dev_err(&pdev->dev, "failed to add platform_data\n");
 573                 goto err2;
 574         }
 575
 576         pm_runtime_enable(&pdev->dev);
 577
 578         ret = platform_device_add(musb);
 579         if (ret) {
 580                 dev_err(&pdev->dev, "failed to register musb device\n");
 581                 goto err2;
 582         }
 583
 584         return 0;
 585
 586 err2:
 587         platform_device_put(musb);
 588
 589 err0:
 590         return ret;
 591 }
 592
 593 static int omap2430_remove(struct platform_device *pdev)
 594 {
 595         struct omap2430_glue            *glue = platform_get_drvdata(pdev);
 596
 597         cancel_work_sync(&glue->omap_musb_mailbox_work);
 598         platform_device_unregister(glue->musb);
 599
 600         return 0;
 601 }
 602
 603 #ifdef CONFIG_PM
 604
 605 static int omap2430_runtime_suspend(struct device *dev)
 606 {
 607         struct omap2430_glue            *glue = dev_get_drvdata(dev);
 608         struct musb                     *musb = glue_to_musb(glue);
 609
 610         if (musb) {
 611                 musb->context.otg_interfsel = musb_readl(musb->mregs,
 612                                 OTG_INTERFSEL);
 613
 614                 omap2430_low_level_exit(musb);
 615                 usb_phy_set_suspend(musb->xceiv, 1);
 616         }
 617
 618         return 0;
 619 }
 620
 621 static int omap2430_runtime_resume(struct device *dev)
 622 {
 623         struct omap2430_glue            *glue = dev_get_drvdata(dev);
 624         struct musb                     *musb = glue_to_musb(glue);
 625
 626         if (musb) {
 627                 omap2430_low_level_init(musb);
 628                 musb_writel(musb->mregs, OTG_INTERFSEL,
 629                                 musb->context.otg_interfsel);
 630
 631                 usb_phy_set_suspend(musb->xceiv, 0);
 632         }
 633
 634         return 0;
 635 }
 636
 637 static struct dev_pm_ops omap2430_pm_ops = {
 638         .runtime_suspend = omap2430_runtime_suspend,
 639         .runtime_resume = omap2430_runtime_resume,
 640 };
 641
 642 #define DEV_PM_OPS      (&omap2430_pm_ops)
 643 #else
 644 #define DEV_PM_OPS      NULL
 645 #endif
 646
 647 #ifdef CONFIG_OF
 648 static const struct of_device_id omap2430_id_table[] = {
 649         {
 650                 .compatible = "ti,omap4-musb"
 651         },
 652         {
 653                 .compatible = "ti,omap3-musb"
 654         },
 655         {},
 656 };
 657 MODULE_DEVICE_TABLE(of, omap2430_id_table);
 658 #endif
 659
 660 static struct platform_driver omap2430_driver = {
 661         .probe          = omap2430_probe,
 662         .remove         = omap2430_remove,
 663         .driver         = {
 664                 .name   = "musb-omap2430",
 665                 .pm     = DEV_PM_OPS,
 666                 .of_match_table = of_match_ptr(omap2430_id_table),
 667         },
 668 };
 669
 670 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
 671 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 672 MODULE_LICENSE("GPL v2");
 673
 674 static int __init omap2430_init(void)
 675 {
 676         return platform_driver_register(&omap2430_driver);
 677 }
 678 subsys_initcall(omap2430_init);
 679
 680 static void __exit omap2430_exit(void)
 681 {
 682         platform_driver_unregister(&omap2430_driver);
 683 }
 684 module_exit(omap2430_exit);