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
  41 #include "musb_core.h"
  42 #include "omap2430.h"
  43
  44 struct omap2430_glue {
  45         struct device           *dev;
  46         struct platform_device  *musb;
  47         enum omap_musb_vbus_id_status status;
  48         struct work_struct      omap_musb_mailbox_work;
  49         u32 __iomem             *control_otghs;
  50 };
  51 #define glue_to_musb(g)         platform_get_drvdata(g->musb)
  52
  53 struct omap2430_glue            *_glue;
  54
  55 static struct timer_list musb_idle_timer;
  56
  57 /**
  58  * omap4_usb_phy_mailbox - write to usb otg mailbox
  59  * @glue: struct omap2430_glue *
  60  * @val: the value to be written to the mailbox
  61  *
  62  * On detection of a device (ID pin is grounded), this API should be called
  63  * to set AVALID, VBUSVALID and ID pin is grounded.
  64  *
  65  * When OMAP is connected to a host (OMAP in device mode), this API
  66  * is called to set AVALID, VBUSVALID and ID pin in high impedance.
  67  *
  68  * XXX: This function will be removed once we have a seperate driver for
  69  * control module
  70  */
  71 static void omap4_usb_phy_mailbox(struct omap2430_glue *glue, u32 val)
  72 {
  73         if (glue->control_otghs)
  74                 writel(val, glue->control_otghs);
  75 }
  76
  77 static void musb_do_idle(unsigned long _musb)
  78 {
  79         struct musb     *musb = (void *)_musb;
  80         unsigned long   flags;
  81         u8      power;
  82         u8      devctl;
  83
  84         spin_lock_irqsave(&musb->lock, flags);
  85
  86         switch (musb->xceiv->state) {
  87         case OTG_STATE_A_WAIT_BCON:
  88
  89                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
  90                 if (devctl & MUSB_DEVCTL_BDEVICE) {
  91                         musb->xceiv->state = OTG_STATE_B_IDLE;
  92                         MUSB_DEV_MODE(musb);
  93                 } else {
  94                         musb->xceiv->state = OTG_STATE_A_IDLE;
  95                         MUSB_HST_MODE(musb);
  96                 }
  97                 break;
  98         case OTG_STATE_A_SUSPEND:
  99                 /* finish RESUME signaling? */
 100                 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
 101                         power = musb_readb(musb->mregs, MUSB_POWER);
 102                         power &= ~MUSB_POWER_RESUME;
 103                         dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
 104                         musb_writeb(musb->mregs, MUSB_POWER, power);
 105                         musb->is_active = 1;
 106                         musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
 107                                                 | MUSB_PORT_STAT_RESUME);
 108                         musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
 109                         usb_hcd_poll_rh_status(musb_to_hcd(musb));
 110                         /* NOTE: it might really be A_WAIT_BCON ... */
 111                         musb->xceiv->state = OTG_STATE_A_HOST;
 112                 }
 113                 break;
 114         case OTG_STATE_A_HOST:
 115                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 116                 if (devctl &  MUSB_DEVCTL_BDEVICE)
 117                         musb->xceiv->state = OTG_STATE_B_IDLE;
 118                 else
 119                         musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
 120         default:
 121                 break;
 122         }
 123         spin_unlock_irqrestore(&musb->lock, flags);
 124 }
 125
 126
 127 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
 128 {
 129         unsigned long           default_timeout = jiffies + msecs_to_jiffies(3);
 130         static unsigned long    last_timer;
 131
 132         if (timeout == 0)
 133                 timeout = default_timeout;
 134
 135         /* Never idle if active, or when VBUS timeout is not set as host */
 136         if (musb->is_active || ((musb->a_wait_bcon == 0)
 137                         && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
 138                 dev_dbg(musb->controller, "%s active, deleting timer\n",
 139                         otg_state_string(musb->xceiv->state));
 140                 del_timer(&musb_idle_timer);
 141                 last_timer = jiffies;
 142                 return;
 143         }
 144
 145         if (time_after(last_timer, timeout)) {
 146                 if (!timer_pending(&musb_idle_timer))
 147                         last_timer = timeout;
 148                 else {
 149                         dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
 150                         return;
 151                 }
 152         }
 153         last_timer = timeout;
 154
 155         dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
 156                 otg_state_string(musb->xceiv->state),
 157                 (unsigned long)jiffies_to_msecs(timeout - jiffies));
 158         mod_timer(&musb_idle_timer, timeout);
 159 }
 160
 161 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
 162 {
 163         struct usb_otg  *otg = musb->xceiv->otg;
 164         u8              devctl;
 165         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 166         /* HDRC controls CPEN, but beware current surges during device
 167          * connect.  They can trigger transient overcurrent conditions
 168          * that must be ignored.
 169          */
 170
 171         devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 172
 173         if (is_on) {
 174                 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
 175                         int loops = 100;
 176                         /* start the session */
 177                         devctl |= MUSB_DEVCTL_SESSION;
 178                         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 179                         /*
 180                          * Wait for the musb to set as A device to enable the
 181                          * VBUS
 182                          */
 183                         while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
 184
 185                                 mdelay(5);
 186                                 cpu_relax();
 187
 188                                 if (time_after(jiffies, timeout)
 189                                     || loops-- <= 0) {
 190                                         dev_err(musb->controller,
 191                                         "configured as A device timeout");
 192                                         break;
 193                                 }
 194                         }
 195
 196                         if (otg->set_vbus)
 197                                 otg_set_vbus(otg, 1);
 198                 } else {
 199                         musb->is_active = 1;
 200                         otg->default_a = 1;
 201                         musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 202                         devctl |= MUSB_DEVCTL_SESSION;
 203                         MUSB_HST_MODE(musb);
 204                 }
 205         } else {
 206                 musb->is_active = 0;
 207
 208                 /* NOTE:  we're skipping A_WAIT_VFALL -> A_IDLE and
 209                  * jumping right to B_IDLE...
 210                  */
 211
 212                 otg->default_a = 0;
 213                 musb->xceiv->state = OTG_STATE_B_IDLE;
 214                 devctl &= ~MUSB_DEVCTL_SESSION;
 215
 216                 MUSB_DEV_MODE(musb);
 217         }
 218         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 219
 220         dev_dbg(musb->controller, "VBUS %s, devctl %02x "
 221                 /* otg %3x conf %08x prcm %08x */ "\n",
 222                 otg_state_string(musb->xceiv->state),
 223                 musb_readb(musb->mregs, MUSB_DEVCTL));
 224 }
 225
 226 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
 227 {
 228         u8      devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 229
 230         devctl |= MUSB_DEVCTL_SESSION;
 231         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 232
 233         return 0;
 234 }
 235
 236 static inline void omap2430_low_level_exit(struct musb *musb)
 237 {
 238         u32 l;
 239
 240         /* in any role */
 241         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
 242         l |= ENABLEFORCE;       /* enable MSTANDBY */
 243         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
 244 }
 245
 246 static inline void omap2430_low_level_init(struct musb *musb)
 247 {
 248         u32 l;
 249
 250         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
 251         l &= ~ENABLEFORCE;      /* disable MSTANDBY */
 252         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
 253 }
 254
 255 void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
 256 {
 257         struct omap2430_glue    *glue = _glue;
 258         struct musb             *musb = glue_to_musb(glue);
 259
 260         glue->status = status;
 261         if (!musb) {
 262                 dev_err(glue->dev, "musb core is not yet ready\n");
 263                 return;
 264         }
 265
 266         schedule_work(&glue->omap_musb_mailbox_work);
 267 }
 268 EXPORT_SYMBOL_GPL(omap_musb_mailbox);
 269
 270 static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 271 {
 272         u32 val;
 273         struct musb *musb = glue_to_musb(glue);
 274         struct device *dev = musb->controller;
 275         struct musb_hdrc_platform_data *pdata = dev->platform_data;
 276         struct omap_musb_board_data *data = pdata->board_data;
 277         struct usb_otg *otg = musb->xceiv->otg;
 278
 279         switch (glue->status) {
 280         case OMAP_MUSB_ID_GROUND:
 281                 dev_dbg(dev, "ID GND\n");
 282
 283                 otg->default_a = true;
 284                 musb->xceiv->state = OTG_STATE_A_IDLE;
 285                 musb->xceiv->last_event = USB_EVENT_ID;
 286                 if (musb->gadget_driver) {
 287                         pm_runtime_get_sync(dev);
 288                         val = AVALID | VBUSVALID;
 289                         omap4_usb_phy_mailbox(glue, val);
 290                         omap2430_musb_set_vbus(musb, 1);
 291                 }
 292                 break;
 293
 294         case OMAP_MUSB_VBUS_VALID:
 295                 dev_dbg(dev, "VBUS Connect\n");
 296
 297                 otg->default_a = false;
 298                 musb->xceiv->state = OTG_STATE_B_IDLE;
 299                 musb->xceiv->last_event = USB_EVENT_VBUS;
 300                 if (musb->gadget_driver)
 301                         pm_runtime_get_sync(dev);
 302                 val = IDDIG | AVALID | VBUSVALID;
 303                 omap4_usb_phy_mailbox(glue, val);
 304                 break;
 305
 306         case OMAP_MUSB_ID_FLOAT:
 307         case OMAP_MUSB_VBUS_OFF:
 308                 dev_dbg(dev, "VBUS Disconnect\n");
 309
 310                 musb->xceiv->last_event = USB_EVENT_NONE;
 311                 if (musb->gadget_driver) {
 312                         pm_runtime_mark_last_busy(dev);
 313                         pm_runtime_put_autosuspend(dev);
 314                 }
 315
 316                 if (data->interface_type == MUSB_INTERFACE_UTMI) {
 317                         if (musb->xceiv->otg->set_vbus)
 318                                 otg_set_vbus(musb->xceiv->otg, 0);
 319                 }
 320                 val = SESSEND | IDDIG;
 321                 omap4_usb_phy_mailbox(glue, val);
 322                 break;
 323         default:
 324                 dev_dbg(dev, "ID float\n");
 325         }
 326 }
 327
 328
 329 static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
 330 {
 331         struct omap2430_glue *glue = container_of(mailbox_work,
 332                                 struct omap2430_glue, omap_musb_mailbox_work);
 333         omap_musb_set_mailbox(glue);
 334 }
 335
 336 static int omap2430_musb_init(struct musb *musb)
 337 {
 338         u32 l;
 339         int status = 0;
 340         struct device *dev = musb->controller;
 341         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 342         struct musb_hdrc_platform_data *plat = dev->platform_data;
 343         struct omap_musb_board_data *data = plat->board_data;
 344
 345         /* We require some kind of external transceiver, hooked
 346          * up through ULPI.  TWL4030-family PMICs include one,
 347          * which needs a driver, drivers aren't always needed.
 348          */
 349         musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
 350         if (IS_ERR_OR_NULL(musb->xceiv)) {
 351                 pr_err("HS USB OTG: no transceiver configured\n");
 352                 return -ENODEV;
 353         }
 354
 355         status = pm_runtime_get_sync(dev);
 356         if (status < 0) {
 357                 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
 358                 goto err1;
 359         }
 360
 361         l = musb_readl(musb->mregs, OTG_INTERFSEL);
 362
 363         if (data->interface_type == MUSB_INTERFACE_UTMI) {
 364                 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
 365                 l &= ~ULPI_12PIN;       /* Disable ULPI */
 366                 l |= UTMI_8BIT;         /* Enable UTMI  */
 367         } else {
 368                 l |= ULPI_12PIN;
 369         }
 370
 371         musb_writel(musb->mregs, OTG_INTERFSEL, l);
 372
 373         pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
 374                         "sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
 375                         musb_readl(musb->mregs, OTG_REVISION),
 376                         musb_readl(musb->mregs, OTG_SYSCONFIG),
 377                         musb_readl(musb->mregs, OTG_SYSSTATUS),
 378                         musb_readl(musb->mregs, OTG_INTERFSEL),
 379                         musb_readl(musb->mregs, OTG_SIMENABLE));
 380
 381         setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
 382
 383         if (glue->status != OMAP_MUSB_UNKNOWN)
 384                 omap_musb_set_mailbox(glue);
 385
 386         pm_runtime_put_noidle(musb->controller);
 387         return 0;
 388
 389 err1:
 390         return status;
 391 }
 392
 393 static void omap2430_musb_enable(struct musb *musb)
 394 {
 395         u8              devctl;
 396         u32             val;
 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                 val = AVALID | VBUSVALID;
 407                 omap4_usb_phy_mailbox(glue, val);
 408                 if (data->interface_type != MUSB_INTERFACE_UTMI)
 409                         break;
 410                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 411                 /* start the session */
 412                 devctl |= MUSB_DEVCTL_SESSION;
 413                 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 414                 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
 415                                 MUSB_DEVCTL_BDEVICE) {
 416                         cpu_relax();
 417
 418                         if (time_after(jiffies, timeout)) {
 419                                 dev_err(dev, "configured as A device timeout");
 420                                 break;
 421                         }
 422                 }
 423                 break;
 424
 425         case OMAP_MUSB_VBUS_VALID:
 426                 val = IDDIG | AVALID | VBUSVALID;
 427                 omap4_usb_phy_mailbox(glue, val);
 428                 break;
 429
 430         default:
 431                 break;
 432         }
 433 }
 434
 435 static void omap2430_musb_disable(struct musb *musb)
 436 {
 437         u32 val;
 438         struct device *dev = musb->controller;
 439         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 440
 441         if (glue->status != OMAP_MUSB_UNKNOWN) {
 442                 val = SESSEND | IDDIG;
 443                 omap4_usb_phy_mailbox(glue, val);
 444         }
 445 }
 446
 447 static int omap2430_musb_exit(struct musb *musb)
 448 {
 449         del_timer_sync(&musb_idle_timer);
 450
 451         omap2430_low_level_exit(musb);
 452
 453         return 0;
 454 }
 455
 456 static const struct musb_platform_ops omap2430_ops = {
 457         .init           = omap2430_musb_init,
 458         .exit           = omap2430_musb_exit,
 459
 460         .set_mode       = omap2430_musb_set_mode,
 461         .try_idle       = omap2430_musb_try_idle,
 462
 463         .set_vbus       = omap2430_musb_set_vbus,
 464
 465         .enable         = omap2430_musb_enable,
 466         .disable        = omap2430_musb_disable,
 467 };
 468
 469 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
 470
 471 static int __devinit omap2430_probe(struct platform_device *pdev)
 472 {
 473         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
 474         struct omap_musb_board_data     *data;
 475         struct platform_device          *musb;
 476         struct omap2430_glue            *glue;
 477         struct device_node              *np = pdev->dev.of_node;
 478         struct musb_hdrc_config         *config;
 479         struct resource                 *res;
 480         int                             ret = -ENOMEM;
 481         int                             musbid;
 482
 483         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
 484         if (!glue) {
 485                 dev_err(&pdev->dev, "failed to allocate glue context\n");
 486                 goto err0;
 487         }
 488
 489         /* get the musb id */
 490         musbid = musb_get_id(&pdev->dev, GFP_KERNEL);
 491         if (musbid < 0) {
 492                 dev_err(&pdev->dev, "failed to allocate musb id\n");
 493                 ret = -ENOMEM;
 494                 goto err0;
 495         }
 496
 497         musb = platform_device_alloc("musb-hdrc", musbid);
 498         if (!musb) {
 499                 dev_err(&pdev->dev, "failed to allocate musb device\n");
 500                 goto err1;
 501         }
 502
 503         musb->id                        = musbid;
 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         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 513
 514         glue->control_otghs = devm_request_and_ioremap(&pdev->dev, res);
 515         if (glue->control_otghs == NULL)
 516                 dev_dbg(&pdev->dev, "Failed to obtain control memory\n");
 517
 518         if (np) {
 519                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 520                 if (!pdata) {
 521                         dev_err(&pdev->dev,
 522                                 "failed to allocate musb platfrom data\n");
 523                         ret = -ENOMEM;
 524                         goto err1;
 525                 }
 526
 527                 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 528                 if (!data) {
 529                         dev_err(&pdev->dev,
 530                                         "failed to allocate musb board data\n");
 531                         ret = -ENOMEM;
 532                         goto err1;
 533                 }
 534
 535                 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
 536                 if (!data) {
 537                         dev_err(&pdev->dev,
 538                                 "failed to allocate musb hdrc config\n");
 539                         goto err1;
 540                 }
 541
 542                 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
 543                 of_property_read_u32(np, "interface_type",
 544                                                 (u32 *)&data->interface_type);
 545                 of_property_read_u32(np, "num_eps", (u32 *)&config->num_eps);
 546                 of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits);
 547                 of_property_read_u32(np, "power", (u32 *)&pdata->power);
 548                 config->multipoint = of_property_read_bool(np, "multipoint");
 549
 550                 pdata->board_data       = data;
 551                 pdata->config           = config;
 552         }
 553
 554         pdata->platform_ops             = &omap2430_ops;
 555
 556         platform_set_drvdata(pdev, glue);
 557
 558         /*
 559          * REVISIT if we ever have two instances of the wrapper, we will be
 560          * in big trouble
 561          */
 562         _glue   = glue;
 563
 564         INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
 565
 566         ret = platform_device_add_resources(musb, pdev->resource,
 567                         pdev->num_resources);
 568         if (ret) {
 569                 dev_err(&pdev->dev, "failed to add resources\n");
 570                 goto err2;
 571         }
 572
 573         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
 574         if (ret) {
 575                 dev_err(&pdev->dev, "failed to add platform_data\n");
 576                 goto err2;
 577         }
 578
 579         pm_runtime_enable(&pdev->dev);
 580
 581         ret = platform_device_add(musb);
 582         if (ret) {
 583                 dev_err(&pdev->dev, "failed to register musb device\n");
 584                 goto err2;
 585         }
 586
 587         return 0;
 588
 589 err2:
 590         platform_device_put(musb);
 591
 592 err1:
 593         musb_put_id(&pdev->dev, musbid);
 594
 595 err0:
 596         return ret;
 597 }
 598
 599 static int __devexit omap2430_remove(struct platform_device *pdev)
 600 {
 601         struct omap2430_glue            *glue = platform_get_drvdata(pdev);
 602
 603         cancel_work_sync(&glue->omap_musb_mailbox_work);
 604         musb_put_id(&pdev->dev, glue->musb->id);
 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         = __devexit_p(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);