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                         usb_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                 usb_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                         otg_set_vbus(otg, 1);
 178                 } else {
 179                         musb->is_active = 1;
 180                         otg->default_a = 1;
 181                         musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 182                         devctl |= MUSB_DEVCTL_SESSION;
 183                         MUSB_HST_MODE(musb);
 184                 }
 185         } else {
 186                 musb->is_active = 0;
 187
 188                 /* NOTE:  we're skipping A_WAIT_VFALL -> A_IDLE and
 189                  * jumping right to B_IDLE...
 190                  */
 191
 192                 otg->default_a = 0;
 193                 musb->xceiv->state = OTG_STATE_B_IDLE;
 194                 devctl &= ~MUSB_DEVCTL_SESSION;
 195
 196                 MUSB_DEV_MODE(musb);
 197         }
 198         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 199
 200         dev_dbg(musb->controller, "VBUS %s, devctl %02x "
 201                 /* otg %3x conf %08x prcm %08x */ "\n",
 202                 usb_otg_state_string(musb->xceiv->state),
 203                 musb_readb(musb->mregs, MUSB_DEVCTL));
 204 }
 205
 206 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
 207 {
 208         u8      devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 209
 210         devctl |= MUSB_DEVCTL_SESSION;
 211         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 212
 213         return 0;
 214 }
 215
 216 static inline void omap2430_low_level_exit(struct musb *musb)
 217 {
 218         u32 l;
 219
 220         /* in any role */
 221         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
 222         l |= ENABLEFORCE;       /* enable MSTANDBY */
 223         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
 224 }
 225
 226 static inline void omap2430_low_level_init(struct musb *musb)
 227 {
 228         u32 l;
 229
 230         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
 231         l &= ~ENABLEFORCE;      /* disable MSTANDBY */
 232         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
 233 }
 234
 235 void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
 236 {
 237         struct omap2430_glue    *glue = _glue;
 238
 239         if (!glue) {
 240                 pr_err("%s: musb core is not yet initialized\n", __func__);
 241                 return;
 242         }
 243         glue->status = status;
 244
 245         if (!glue_to_musb(glue)) {
 246                 pr_err("%s: musb core is not yet ready\n", __func__);
 247                 return;
 248         }
 249
 250         schedule_work(&glue->omap_musb_mailbox_work);
 251 }
 252 EXPORT_SYMBOL_GPL(omap_musb_mailbox);
 253
 254 static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 255 {
 256         struct musb *musb = glue_to_musb(glue);
 257         struct device *dev = musb->controller;
 258         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 259         struct omap_musb_board_data *data = pdata->board_data;
 260         struct usb_otg *otg = musb->xceiv->otg;
 261
 262         switch (glue->status) {
 263         case OMAP_MUSB_ID_GROUND:
 264                 dev_dbg(dev, "ID GND\n");
 265
 266                 otg->default_a = true;
 267                 musb->xceiv->state = OTG_STATE_A_IDLE;
 268                 musb->xceiv->last_event = USB_EVENT_ID;
 269                 if (musb->gadget_driver) {
 270                         pm_runtime_get_sync(dev);
 271                         omap_control_usb_set_mode(glue->control_otghs,
 272                                 USB_MODE_HOST);
 273                         omap2430_musb_set_vbus(musb, 1);
 274                 }
 275                 break;
 276
 277         case OMAP_MUSB_VBUS_VALID:
 278                 dev_dbg(dev, "VBUS Connect\n");
 279
 280                 otg->default_a = false;
 281                 musb->xceiv->state = OTG_STATE_B_IDLE;
 282                 musb->xceiv->last_event = USB_EVENT_VBUS;
 283                 if (musb->gadget_driver)
 284                         pm_runtime_get_sync(dev);
 285                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
 286                 break;
 287
 288         case OMAP_MUSB_ID_FLOAT:
 289         case OMAP_MUSB_VBUS_OFF:
 290                 dev_dbg(dev, "VBUS Disconnect\n");
 291
 292                 musb->xceiv->last_event = USB_EVENT_NONE;
 293                 if (musb->gadget_driver) {
 294                         omap2430_musb_set_vbus(musb, 0);
 295                         pm_runtime_mark_last_busy(dev);
 296                         pm_runtime_put_autosuspend(dev);
 297                 }
 298
 299                 if (data->interface_type == MUSB_INTERFACE_UTMI)
 300                         otg_set_vbus(musb->xceiv->otg, 0);
 301
 302                 omap_control_usb_set_mode(glue->control_otghs,
 303                         USB_MODE_DISCONNECT);
 304                 break;
 305         default:
 306                 dev_dbg(dev, "ID float\n");
 307         }
 308 }
 309
 310
 311 static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
 312 {
 313         struct omap2430_glue *glue = container_of(mailbox_work,
 314                                 struct omap2430_glue, omap_musb_mailbox_work);
 315         omap_musb_set_mailbox(glue);
 316 }
 317
 318 static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
 319 {
 320         unsigned long   flags;
 321         irqreturn_t     retval = IRQ_NONE;
 322         struct musb     *musb = __hci;
 323
 324         spin_lock_irqsave(&musb->lock, flags);
 325
 326         musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
 327         musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
 328         musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
 329
 330         if (musb->int_usb || musb->int_tx || musb->int_rx)
 331                 retval = musb_interrupt(musb);
 332
 333         spin_unlock_irqrestore(&musb->lock, flags);
 334
 335         return retval;
 336 }
 337
 338 static int omap2430_musb_init(struct musb *musb)
 339 {
 340         u32 l;
 341         int status = 0;
 342         struct device *dev = musb->controller;
 343         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 344         struct musb_hdrc_platform_data *plat = dev->platform_data;
 345         struct omap_musb_board_data *data = plat->board_data;
 346
 347         /* We require some kind of external transceiver, hooked
 348          * up through ULPI.  TWL4030-family PMICs include one,
 349          * which needs a driver, drivers aren't always needed.
 350          */
 351         if (dev->parent->of_node)
 352                 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent,
 353                     "usb-phy", 0);
 354         else
 355                 musb->xceiv = devm_usb_get_phy_dev(dev, 0);
 356
 357         if (IS_ERR(musb->xceiv)) {
 358                 status = PTR_ERR(musb->xceiv);
 359
 360                 if (status == -ENXIO)
 361                         return status;
 362
 363                 pr_err("HS USB OTG: no transceiver configured\n");
 364                 return -EPROBE_DEFER;
 365         }
 366
 367         musb->isr = omap2430_musb_interrupt;
 368
 369         status = pm_runtime_get_sync(dev);
 370         if (status < 0) {
 371                 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
 372                 goto err1;
 373         }
 374
 375         l = musb_readl(musb->mregs, OTG_INTERFSEL);
 376
 377         if (data->interface_type == MUSB_INTERFACE_UTMI) {
 378                 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
 379                 l &= ~ULPI_12PIN;       /* Disable ULPI */
 380                 l |= UTMI_8BIT;         /* Enable UTMI  */
 381         } else {
 382                 l |= ULPI_12PIN;
 383         }
 384
 385         musb_writel(musb->mregs, OTG_INTERFSEL, l);
 386
 387         pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
 388                         "sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
 389                         musb_readl(musb->mregs, OTG_REVISION),
 390                         musb_readl(musb->mregs, OTG_SYSCONFIG),
 391                         musb_readl(musb->mregs, OTG_SYSSTATUS),
 392                         musb_readl(musb->mregs, OTG_INTERFSEL),
 393                         musb_readl(musb->mregs, OTG_SIMENABLE));
 394
 395         setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
 396
 397         if (glue->status != OMAP_MUSB_UNKNOWN)
 398                 omap_musb_set_mailbox(glue);
 399
 400         usb_phy_init(musb->xceiv);
 401
 402         pm_runtime_put_noidle(musb->controller);
 403         return 0;
 404
 405 err1:
 406         return status;
 407 }
 408
 409 static void omap2430_musb_enable(struct musb *musb)
 410 {
 411         u8              devctl;
 412         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 413         struct device *dev = musb->controller;
 414         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 415         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 416         struct omap_musb_board_data *data = pdata->board_data;
 417
 418         switch (glue->status) {
 419
 420         case OMAP_MUSB_ID_GROUND:
 421                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
 422                 if (data->interface_type != MUSB_INTERFACE_UTMI)
 423                         break;
 424                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 425                 /* start the session */
 426                 devctl |= MUSB_DEVCTL_SESSION;
 427                 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 428                 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
 429                                 MUSB_DEVCTL_BDEVICE) {
 430                         cpu_relax();
 431
 432                         if (time_after(jiffies, timeout)) {
 433                                 dev_err(dev, "configured as A device timeout");
 434                                 break;
 435                         }
 436                 }
 437                 break;
 438
 439         case OMAP_MUSB_VBUS_VALID:
 440                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
 441                 break;
 442
 443         default:
 444                 break;
 445         }
 446 }
 447
 448 static void omap2430_musb_disable(struct musb *musb)
 449 {
 450         struct device *dev = musb->controller;
 451         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 452
 453         if (glue->status != OMAP_MUSB_UNKNOWN)
 454                 omap_control_usb_set_mode(glue->control_otghs,
 455                         USB_MODE_DISCONNECT);
 456 }
 457
 458 static int omap2430_musb_exit(struct musb *musb)
 459 {
 460         del_timer_sync(&musb_idle_timer);
 461
 462         omap2430_low_level_exit(musb);
 463
 464         return 0;
 465 }
 466
 467 static const struct musb_platform_ops omap2430_ops = {
 468         .init           = omap2430_musb_init,
 469         .exit           = omap2430_musb_exit,
 470
 471         .set_mode       = omap2430_musb_set_mode,
 472         .try_idle       = omap2430_musb_try_idle,
 473
 474         .set_vbus       = omap2430_musb_set_vbus,
 475
 476         .enable         = omap2430_musb_enable,
 477         .disable        = omap2430_musb_disable,
 478 };
 479
 480 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
 481
 482 static int omap2430_probe(struct platform_device *pdev)
 483 {
 484         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
 485         struct omap_musb_board_data     *data;
 486         struct platform_device          *musb;
 487         struct omap2430_glue            *glue;
 488         struct device_node              *np = pdev->dev.of_node;
 489         struct musb_hdrc_config         *config;
 490         int                             ret = -ENOMEM;
 491
 492         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
 493         if (!glue) {
 494                 dev_err(&pdev->dev, "failed to allocate glue context\n");
 495                 goto err0;
 496         }
 497
 498         musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
 499         if (!musb) {
 500                 dev_err(&pdev->dev, "failed to allocate musb device\n");
 501                 goto err0;
 502         }
 503
 504         musb->dev.parent                = &pdev->dev;
 505         musb->dev.dma_mask              = &omap2430_dmamask;
 506         musb->dev.coherent_dma_mask     = omap2430_dmamask;
 507
 508         glue->dev                       = &pdev->dev;
 509         glue->musb                      = musb;
 510         glue->status                    = OMAP_MUSB_UNKNOWN;
 511
 512         if (np) {
 513                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 514                 if (!pdata) {
 515                         dev_err(&pdev->dev,
 516                                 "failed to allocate musb platfrom data\n");
 517                         goto err2;
 518                 }
 519
 520                 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 521                 if (!data) {
 522                         dev_err(&pdev->dev,
 523                                 "failed to allocate musb board data\n");
 524                         goto err2;
 525                 }
 526
 527                 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
 528                 if (!config) {
 529                         dev_err(&pdev->dev,
 530                                 "failed to allocate musb hdrc config\n");
 531                         goto err2;
 532                 }
 533
 534                 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
 535                 of_property_read_u32(np, "interface-type",
 536                                                 (u32 *)&data->interface_type);
 537                 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
 538                 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
 539                 of_property_read_u32(np, "power", (u32 *)&pdata->power);
 540                 config->multipoint = of_property_read_bool(np, "multipoint");
 541                 pdata->has_mailbox = of_property_read_bool(np,
 542                     "ti,has-mailbox");
 543
 544                 pdata->board_data       = data;
 545                 pdata->config           = config;
 546         }
 547
 548         if (pdata->has_mailbox) {
 549                 glue->control_otghs = omap_get_control_dev();
 550                 if (IS_ERR(glue->control_otghs)) {
 551                         dev_vdbg(&pdev->dev, "Failed to get control device\n");
 552                         ret = PTR_ERR(glue->control_otghs);
 553                         goto err2;
 554                 }
 555         } else {
 556                 glue->control_otghs = ERR_PTR(-ENODEV);
 557         }
 558         pdata->platform_ops             = &omap2430_ops;
 559
 560         platform_set_drvdata(pdev, glue);
 561
 562         /*
 563          * REVISIT if we ever have two instances of the wrapper, we will be
 564          * in big trouble
 565          */
 566         _glue   = glue;
 567
 568         INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
 569
 570         ret = platform_device_add_resources(musb, pdev->resource,
 571                         pdev->num_resources);
 572         if (ret) {
 573                 dev_err(&pdev->dev, "failed to add resources\n");
 574                 goto err2;
 575         }
 576
 577         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
 578         if (ret) {
 579                 dev_err(&pdev->dev, "failed to add platform_data\n");
 580                 goto err2;
 581         }
 582
 583         pm_runtime_enable(&pdev->dev);
 584
 585         ret = platform_device_add(musb);
 586         if (ret) {
 587                 dev_err(&pdev->dev, "failed to register musb device\n");
 588                 goto err2;
 589         }
 590
 591         return 0;
 592
 593 err2:
 594         platform_device_put(musb);
 595
 596 err0:
 597         return ret;
 598 }
 599
 600 static int omap2430_remove(struct platform_device *pdev)
 601 {
 602         struct omap2430_glue            *glue = platform_get_drvdata(pdev);
 603
 604         cancel_work_sync(&glue->omap_musb_mailbox_work);
 605         platform_device_unregister(glue->musb);
 606
 607         return 0;
 608 }
 609
 610 #ifdef CONFIG_PM
 611
 612 static int omap2430_runtime_suspend(struct device *dev)
 613 {
 614         struct omap2430_glue            *glue = dev_get_drvdata(dev);
 615         struct musb                     *musb = glue_to_musb(glue);
 616
 617         if (musb) {
 618                 musb->context.otg_interfsel = musb_readl(musb->mregs,
 619                                 OTG_INTERFSEL);
 620
 621                 omap2430_low_level_exit(musb);
 622                 usb_phy_set_suspend(musb->xceiv, 1);
 623         }
 624
 625         return 0;
 626 }
 627
 628 static int omap2430_runtime_resume(struct device *dev)
 629 {
 630         struct omap2430_glue            *glue = dev_get_drvdata(dev);
 631         struct musb                     *musb = glue_to_musb(glue);
 632
 633         if (musb) {
 634                 omap2430_low_level_init(musb);
 635                 musb_writel(musb->mregs, OTG_INTERFSEL,
 636                                 musb->context.otg_interfsel);
 637
 638                 usb_phy_set_suspend(musb->xceiv, 0);
 639         }
 640
 641         return 0;
 642 }
 643
 644 static struct dev_pm_ops omap2430_pm_ops = {
 645         .runtime_suspend = omap2430_runtime_suspend,
 646         .runtime_resume = omap2430_runtime_resume,
 647 };
 648
 649 #define DEV_PM_OPS      (&omap2430_pm_ops)
 650 #else
 651 #define DEV_PM_OPS      NULL
 652 #endif
 653
 654 #ifdef CONFIG_OF
 655 static const struct of_device_id omap2430_id_table[] = {
 656         {
 657                 .compatible = "ti,omap4-musb"
 658         },
 659         {
 660                 .compatible = "ti,omap3-musb"
 661         },
 662         {},
 663 };
 664 MODULE_DEVICE_TABLE(of, omap2430_id_table);
 665 #endif
 666
 667 static struct platform_driver omap2430_driver = {
 668         .probe          = omap2430_probe,
 669         .remove         = omap2430_remove,
 670         .driver         = {
 671                 .name   = "musb-omap2430",
 672                 .pm     = DEV_PM_OPS,
 673                 .of_match_table = of_match_ptr(omap2430_id_table),
 674         },
 675 };
 676
 677 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
 678 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 679 MODULE_LICENSE("GPL v2");
 680
 681 static int __init omap2430_init(void)
 682 {
 683         return platform_driver_register(&omap2430_driver);
 684 }
 685 subsys_initcall(omap2430_init);
 686
 687 static void __exit omap2430_exit(void)
 688 {
 689         platform_driver_unregister(&omap2430_driver);
 690 }
 691 module_exit(omap2430_exit);