drivers/usb/musb/musb_dsps.c

   1 /*
   2  * Texas Instruments DSPS platforms "glue layer"
   3  *
   4  * Copyright (C) 2012, by Texas Instruments
   5  *
   6  * Based on the am35x "glue layer" code.
   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  * musb_dsps.c will be a common file for all the TI DSPS platforms
  27  * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x.
  28  * For now only ti81x is using this and in future davinci.c, am35x.c
  29  * da8xx.c would be merged to this file after testing.
  30  */
  31
  32 #include <linux/init.h>
  33 #include <linux/io.h>
  34 #include <linux/err.h>
  35 #include <linux/platform_device.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/pm_runtime.h>
  38 #include <linux/module.h>
  39 #include <linux/usb/usb_phy_gen_xceiv.h>
  40 #include <linux/platform_data/usb-omap.h>
  41 #include <linux/sizes.h>
  42
  43 #include <linux/of.h>
  44 #include <linux/of_device.h>
  45 #include <linux/of_address.h>
  46 #include <linux/of_irq.h>
  47
  48 #include "musb_core.h"
  49
  50 static const struct of_device_id musb_dsps_of_match[];
  51
  52 /**
  53  * avoid using musb_readx()/musb_writex() as glue layer should not be
  54  * dependent on musb core layer symbols.
  55  */
  56 static inline u8 dsps_readb(const void __iomem *addr, unsigned offset)
  57         { return __raw_readb(addr + offset); }
  58
  59 static inline u32 dsps_readl(const void __iomem *addr, unsigned offset)
  60         { return __raw_readl(addr + offset); }
  61
  62 static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data)
  63         { __raw_writeb(data, addr + offset); }
  64
  65 static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data)
  66         { __raw_writel(data, addr + offset); }
  67
  68 /**
  69  * DSPS musb wrapper register offset.
  70  * FIXME: This should be expanded to have all the wrapper registers from TI DSPS
  71  * musb ips.
  72  */
  73 struct dsps_musb_wrapper {
  74         u16     revision;
  75         u16     control;
  76         u16     status;
  77         u16     epintr_set;
  78         u16     epintr_clear;
  79         u16     epintr_status;
  80         u16     coreintr_set;
  81         u16     coreintr_clear;
  82         u16     coreintr_status;
  83         u16     phy_utmi;
  84         u16     mode;
  85
  86         /* bit positions for control */
  87         unsigned        reset:5;
  88
  89         /* bit positions for interrupt */
  90         unsigned        usb_shift:5;
  91         u32             usb_mask;
  92         u32             usb_bitmap;
  93         unsigned        drvvbus:5;
  94
  95         unsigned        txep_shift:5;
  96         u32             txep_mask;
  97         u32             txep_bitmap;
  98
  99         unsigned        rxep_shift:5;
 100         u32             rxep_mask;
 101         u32             rxep_bitmap;
 102
 103         /* bit positions for phy_utmi */
 104         unsigned        otg_disable:5;
 105
 106         /* bit positions for mode */
 107         unsigned        iddig:5;
 108         /* miscellaneous stuff */
 109         u8              poll_seconds;
 110 };
 111
 112 /**
 113  * DSPS glue structure.
 114  */
 115 struct dsps_glue {
 116         struct device *dev;
 117         struct platform_device *musb;   /* child musb pdev */
 118         const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
 119         struct timer_list timer;        /* otg_workaround timer */
 120         unsigned long last_timer;    /* last timer data for each instance */
 121 };
 122
 123 /**
 124  * dsps_musb_enable - enable interrupts
 125  */
 126 static void dsps_musb_enable(struct musb *musb)
 127 {
 128         struct device *dev = musb->controller;
 129         struct platform_device *pdev = to_platform_device(dev->parent);
 130         struct dsps_glue *glue = platform_get_drvdata(pdev);
 131         const struct dsps_musb_wrapper *wrp = glue->wrp;
 132         void __iomem *reg_base = musb->ctrl_base;
 133         u32 epmask, coremask;
 134
 135         /* Workaround: setup IRQs through both register sets. */
 136         epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
 137                ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
 138         coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
 139
 140         dsps_writel(reg_base, wrp->epintr_set, epmask);
 141         dsps_writel(reg_base, wrp->coreintr_set, coremask);
 142         /* Force the DRVVBUS IRQ so we can start polling for ID change. */
 143         dsps_writel(reg_base, wrp->coreintr_set,
 144                     (1 << wrp->drvvbus) << wrp->usb_shift);
 145 }
 146
 147 /**
 148  * dsps_musb_disable - disable HDRC and flush interrupts
 149  */
 150 static void dsps_musb_disable(struct musb *musb)
 151 {
 152         struct device *dev = musb->controller;
 153         struct platform_device *pdev = to_platform_device(dev->parent);
 154         struct dsps_glue *glue = platform_get_drvdata(pdev);
 155         const struct dsps_musb_wrapper *wrp = glue->wrp;
 156         void __iomem *reg_base = musb->ctrl_base;
 157
 158         dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
 159         dsps_writel(reg_base, wrp->epintr_clear,
 160                          wrp->txep_bitmap | wrp->rxep_bitmap);
 161         dsps_writeb(musb->mregs, MUSB_DEVCTL, 0);
 162 }
 163
 164 static void otg_timer(unsigned long _musb)
 165 {
 166         struct musb *musb = (void *)_musb;
 167         void __iomem *mregs = musb->mregs;
 168         struct device *dev = musb->controller;
 169         struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 170         const struct dsps_musb_wrapper *wrp = glue->wrp;
 171         u8 devctl;
 172         unsigned long flags;
 173
 174         /*
 175          * We poll because DSPS IP's won't expose several OTG-critical
 176          * status change events (from the transceiver) otherwise.
 177          */
 178         devctl = dsps_readb(mregs, MUSB_DEVCTL);
 179         dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
 180                                 usb_otg_state_string(musb->xceiv->state));
 181
 182         spin_lock_irqsave(&musb->lock, flags);
 183         switch (musb->xceiv->state) {
 184         case OTG_STATE_A_WAIT_BCON:
 185                 devctl &= ~MUSB_DEVCTL_SESSION;
 186                 dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 187
 188                 devctl = dsps_readb(musb->mregs, MUSB_DEVCTL);
 189                 if (devctl & MUSB_DEVCTL_BDEVICE) {
 190                         musb->xceiv->state = OTG_STATE_B_IDLE;
 191                         MUSB_DEV_MODE(musb);
 192                 } else {
 193                         musb->xceiv->state = OTG_STATE_A_IDLE;
 194                         MUSB_HST_MODE(musb);
 195                 }
 196                 break;
 197         case OTG_STATE_A_WAIT_VFALL:
 198                 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 199                 dsps_writel(musb->ctrl_base, wrp->coreintr_set,
 200                             MUSB_INTR_VBUSERROR << wrp->usb_shift);
 201                 break;
 202         case OTG_STATE_B_IDLE:
 203                 devctl = dsps_readb(mregs, MUSB_DEVCTL);
 204                 if (devctl & MUSB_DEVCTL_BDEVICE)
 205                         mod_timer(&glue->timer,
 206                                         jiffies + wrp->poll_seconds * HZ);
 207                 else
 208                         musb->xceiv->state = OTG_STATE_A_IDLE;
 209                 break;
 210         default:
 211                 break;
 212         }
 213         spin_unlock_irqrestore(&musb->lock, flags);
 214 }
 215
 216 static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
 217 {
 218         struct device *dev = musb->controller;
 219         struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 220
 221         if (timeout == 0)
 222                 timeout = jiffies + msecs_to_jiffies(3);
 223
 224         /* Never idle if active, or when VBUS timeout is not set as host */
 225         if (musb->is_active || (musb->a_wait_bcon == 0 &&
 226                                 musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
 227                 dev_dbg(musb->controller, "%s active, deleting timer\n",
 228                                 usb_otg_state_string(musb->xceiv->state));
 229                 del_timer(&glue->timer);
 230                 glue->last_timer = jiffies;
 231                 return;
 232         }
 233
 234         if (time_after(glue->last_timer, timeout) &&
 235                                 timer_pending(&glue->timer)) {
 236                 dev_dbg(musb->controller,
 237                         "Longer idle timer already pending, ignoring...\n");
 238                 return;
 239         }
 240         glue->last_timer = timeout;
 241
 242         dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
 243                 usb_otg_state_string(musb->xceiv->state),
 244                         jiffies_to_msecs(timeout - jiffies));
 245         mod_timer(&glue->timer, timeout);
 246 }
 247
 248 static irqreturn_t dsps_interrupt(int irq, void *hci)
 249 {
 250         struct musb  *musb = hci;
 251         void __iomem *reg_base = musb->ctrl_base;
 252         struct device *dev = musb->controller;
 253         struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 254         const struct dsps_musb_wrapper *wrp = glue->wrp;
 255         unsigned long flags;
 256         irqreturn_t ret = IRQ_NONE;
 257         u32 epintr, usbintr;
 258
 259         spin_lock_irqsave(&musb->lock, flags);
 260
 261         /* Get endpoint interrupts */
 262         epintr = dsps_readl(reg_base, wrp->epintr_status);
 263         musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
 264         musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
 265
 266         if (epintr)
 267                 dsps_writel(reg_base, wrp->epintr_status, epintr);
 268
 269         /* Get usb core interrupts */
 270         usbintr = dsps_readl(reg_base, wrp->coreintr_status);
 271         if (!usbintr && !epintr)
 272                 goto out;
 273
 274         musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
 275         if (usbintr)
 276                 dsps_writel(reg_base, wrp->coreintr_status, usbintr);
 277
 278         dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
 279                         usbintr, epintr);
 280         /*
 281          * DRVVBUS IRQs are the only proxy we have (a very poor one!) for
 282          * DSPS IP's missing ID change IRQ.  We need an ID change IRQ to
 283          * switch appropriately between halves of the OTG state machine.
 284          * Managing DEVCTL.SESSION per Mentor docs requires that we know its
 285          * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set.
 286          * Also, DRVVBUS pulses for SRP (but not at 5V) ...
 287          */
 288         if (is_host_active(musb) && usbintr & MUSB_INTR_BABBLE)
 289                 pr_info("CAUTION: musb: Babble Interrupt Occurred\n");
 290
 291         if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
 292                 int drvvbus = dsps_readl(reg_base, wrp->status);
 293                 void __iomem *mregs = musb->mregs;
 294                 u8 devctl = dsps_readb(mregs, MUSB_DEVCTL);
 295                 int err;
 296
 297                 err = musb->int_usb & MUSB_INTR_VBUSERROR;
 298                 if (err) {
 299                         /*
 300                          * The Mentor core doesn't debounce VBUS as needed
 301                          * to cope with device connect current spikes. This
 302                          * means it's not uncommon for bus-powered devices
 303                          * to get VBUS errors during enumeration.
 304                          *
 305                          * This is a workaround, but newer RTL from Mentor
 306                          * seems to allow a better one: "re"-starting sessions
 307                          * without waiting for VBUS to stop registering in
 308                          * devctl.
 309                          */
 310                         musb->int_usb &= ~MUSB_INTR_VBUSERROR;
 311                         musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
 312                         mod_timer(&glue->timer,
 313                                         jiffies + wrp->poll_seconds * HZ);
 314                         WARNING("VBUS error workaround (delay coming)\n");
 315                 } else if (drvvbus) {
 316                         musb->is_active = 1;
 317                         MUSB_HST_MODE(musb);
 318                         musb->xceiv->otg->default_a = 1;
 319                         musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 320                         del_timer(&glue->timer);
 321                 } else {
 322                         musb->is_active = 0;
 323                         MUSB_DEV_MODE(musb);
 324                         musb->xceiv->otg->default_a = 0;
 325                         musb->xceiv->state = OTG_STATE_B_IDLE;
 326                 }
 327
 328                 /* NOTE: this must complete power-on within 100 ms. */
 329                 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
 330                                 drvvbus ? "on" : "off",
 331                                 usb_otg_state_string(musb->xceiv->state),
 332                                 err ? " ERROR" : "",
 333                                 devctl);
 334                 ret = IRQ_HANDLED;
 335         }
 336
 337         if (musb->int_tx || musb->int_rx || musb->int_usb)
 338                 ret |= musb_interrupt(musb);
 339
 340         /* Poll for ID change */
 341         if (musb->xceiv->state == OTG_STATE_B_IDLE)
 342                 mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ);
 343 out:
 344         spin_unlock_irqrestore(&musb->lock, flags);
 345
 346         return ret;
 347 }
 348
 349 static int dsps_musb_init(struct musb *musb)
 350 {
 351         struct device *dev = musb->controller;
 352         struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 353         struct platform_device *parent = to_platform_device(dev->parent);
 354         const struct dsps_musb_wrapper *wrp = glue->wrp;
 355         void __iomem *reg_base;
 356         struct resource *r;
 357         u32 rev, val;
 358
 359         r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
 360         if (!r)
 361                 return -EINVAL;
 362
 363         reg_base = devm_ioremap_resource(dev, r);
 364         if (!musb->ctrl_base)
 365                 return -EINVAL;
 366         musb->ctrl_base = reg_base;
 367
 368         /* NOP driver needs change if supporting dual instance */
 369         musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0);
 370         if (IS_ERR(musb->xceiv))
 371                 return PTR_ERR(musb->xceiv);
 372
 373         /* Returns zero if e.g. not clocked */
 374         rev = dsps_readl(reg_base, wrp->revision);
 375         if (!rev)
 376                 return -ENODEV;
 377
 378         usb_phy_init(musb->xceiv);
 379         setup_timer(&glue->timer, otg_timer, (unsigned long) musb);
 380
 381         /* Reset the musb */
 382         dsps_writel(reg_base, wrp->control, (1 << wrp->reset));
 383
 384         musb->isr = dsps_interrupt;
 385
 386         /* reset the otgdisable bit, needed for host mode to work */
 387         val = dsps_readl(reg_base, wrp->phy_utmi);
 388         val &= ~(1 << wrp->otg_disable);
 389         dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);
 390
 391         return 0;
 392 }
 393
 394 static int dsps_musb_exit(struct musb *musb)
 395 {
 396         struct device *dev = musb->controller;
 397         struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 398
 399         del_timer_sync(&glue->timer);
 400
 401         usb_phy_shutdown(musb->xceiv);
 402         return 0;
 403 }
 404
 405 static struct musb_platform_ops dsps_ops = {
 406         .init           = dsps_musb_init,
 407         .exit           = dsps_musb_exit,
 408
 409         .enable         = dsps_musb_enable,
 410         .disable        = dsps_musb_disable,
 411
 412         .try_idle       = dsps_musb_try_idle,
 413 };
 414
 415 static u64 musb_dmamask = DMA_BIT_MASK(32);
 416
 417 static int get_int_prop(struct device_node *dn, const char *s)
 418 {
 419         int ret;
 420         u32 val;
 421
 422         ret = of_property_read_u32(dn, s, &val);
 423         if (ret)
 424                 return 0;
 425         return val;
 426 }
 427
 428 static int dsps_create_musb_pdev(struct dsps_glue *glue,
 429                 struct platform_device *parent)
 430 {
 431         struct musb_hdrc_platform_data pdata;
 432         struct resource resources[2];
 433         struct device *dev = &parent->dev;
 434         struct musb_hdrc_config *config;
 435         struct platform_device *musb;
 436         struct device_node *dn = parent->dev.of_node;
 437         struct device_node *child_node;
 438         int ret;
 439
 440         child_node = of_get_child_by_name(dn, "usb");
 441         if (!child_node)
 442                 return -EINVAL;
 443
 444         memset(resources, 0, sizeof(resources));
 445         ret = of_address_to_resource(child_node, 0, &resources[0]);
 446         if (ret) {
 447                 dev_err(dev, "failed to get memory.\n");
 448                 return ret;
 449         }
 450
 451         ret = of_irq_to_resource(child_node, 0, &resources[1]);
 452         if (ret == 0) {
 453                 dev_err(dev, "failed to get irq.\n");
 454                 ret = -EINVAL;
 455                 return ret;
 456         }
 457
 458         /* allocate the child platform device */
 459         musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
 460         if (!musb) {
 461                 dev_err(dev, "failed to allocate musb device\n");
 462                 return -ENOMEM;
 463         }
 464
 465         musb->dev.parent                = dev;
 466         musb->dev.dma_mask              = &musb_dmamask;
 467         musb->dev.coherent_dma_mask     = musb_dmamask;
 468         musb->dev.of_node               = of_node_get(child_node);
 469
 470         glue->musb = musb;
 471
 472         ret = platform_device_add_resources(musb, resources,
 473                         ARRAY_SIZE(resources));
 474         if (ret) {
 475                 dev_err(dev, "failed to add resources\n");
 476                 goto err;
 477         }
 478
 479         config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL);
 480         if (!config) {
 481                 dev_err(dev, "failed to allocate musb hdrc config\n");
 482                 ret = -ENOMEM;
 483                 goto err;
 484         }
 485         pdata.config = config;
 486         pdata.platform_ops = &dsps_ops;
 487
 488         config->num_eps = get_int_prop(child_node, "num-eps");
 489         config->ram_bits = get_int_prop(child_node, "ram-bits");
 490         pdata.mode = get_int_prop(child_node, "port-mode");
 491         pdata.power = get_int_prop(child_node, "power");
 492         config->multipoint = of_property_read_bool(child_node, "multipoint");
 493
 494         ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
 495         if (ret) {
 496                 dev_err(dev, "failed to add platform_data\n");
 497                 goto err;
 498         }
 499
 500         ret = platform_device_add(musb);
 501         if (ret) {
 502                 dev_err(dev, "failed to register musb device\n");
 503                 goto err;
 504         }
 505         return 0;
 506
 507 err:
 508         platform_device_put(musb);
 509         return ret;
 510 }
 511
 512 static int dsps_probe(struct platform_device *pdev)
 513 {
 514         const struct of_device_id *match;
 515         const struct dsps_musb_wrapper *wrp;
 516         struct dsps_glue *glue;
 517         int ret;
 518
 519         match = of_match_node(musb_dsps_of_match, pdev->dev.of_node);
 520         if (!match) {
 521                 dev_err(&pdev->dev, "fail to get matching of_match struct\n");
 522                 return -EINVAL;
 523         }
 524         wrp = match->data;
 525
 526         /* allocate glue */
 527         glue = kzalloc(sizeof(*glue), GFP_KERNEL);
 528         if (!glue) {
 529                 dev_err(&pdev->dev, "unable to allocate glue memory\n");
 530                 return -ENOMEM;
 531         }
 532
 533         glue->dev = &pdev->dev;
 534         glue->wrp = wrp;
 535
 536         platform_set_drvdata(pdev, glue);
 537         pm_runtime_enable(&pdev->dev);
 538
 539         ret = pm_runtime_get_sync(&pdev->dev);
 540         if (ret < 0) {
 541                 dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
 542                 goto err2;
 543         }
 544
 545         ret = dsps_create_musb_pdev(glue, pdev);
 546         if (ret)
 547                 goto err3;
 548
 549         return 0;
 550
 551 err3:
 552         pm_runtime_put(&pdev->dev);
 553 err2:
 554         pm_runtime_disable(&pdev->dev);
 555         kfree(glue);
 556         return ret;
 557 }
 558
 559 static int dsps_remove(struct platform_device *pdev)
 560 {
 561         struct dsps_glue *glue = platform_get_drvdata(pdev);
 562
 563         platform_device_unregister(glue->musb);
 564
 565         /* disable usbss clocks */
 566         pm_runtime_put(&pdev->dev);
 567         pm_runtime_disable(&pdev->dev);
 568         kfree(glue);
 569         return 0;
 570 }
 571
 572 static const struct dsps_musb_wrapper am33xx_driver_data = {
 573         .revision               = 0x00,
 574         .control                = 0x14,
 575         .status                 = 0x18,
 576         .epintr_set             = 0x38,
 577         .epintr_clear           = 0x40,
 578         .epintr_status          = 0x30,
 579         .coreintr_set           = 0x3c,
 580         .coreintr_clear         = 0x44,
 581         .coreintr_status        = 0x34,
 582         .phy_utmi               = 0xe0,
 583         .mode                   = 0xe8,
 584         .reset                  = 0,
 585         .otg_disable            = 21,
 586         .iddig                  = 8,
 587         .usb_shift              = 0,
 588         .usb_mask               = 0x1ff,
 589         .usb_bitmap             = (0x1ff << 0),
 590         .drvvbus                = 8,
 591         .txep_shift             = 0,
 592         .txep_mask              = 0xffff,
 593         .txep_bitmap            = (0xffff << 0),
 594         .rxep_shift             = 16,
 595         .rxep_mask              = 0xfffe,
 596         .rxep_bitmap            = (0xfffe << 16),
 597         .poll_seconds           = 2,
 598 };
 599
 600 static const struct of_device_id musb_dsps_of_match[] = {
 601         { .compatible = "ti,musb-am33xx",
 602                 .data = (void *) &am33xx_driver_data, },
 603         {  },
 604 };
 605 MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
 606
 607 static struct platform_driver dsps_usbss_driver = {
 608         .probe          = dsps_probe,
 609         .remove         = dsps_remove,
 610         .driver         = {
 611                 .name   = "musb-dsps",
 612                 .of_match_table = of_match_ptr(musb_dsps_of_match),
 613         },
 614 };
 615
 616 MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
 617 MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
 618 MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
 619 MODULE_LICENSE("GPL v2");
 620
 621 module_platform_driver(dsps_usbss_driver);