musb_dsps.c revision e96bdc3dafe471375e2e780e319e3ead2d9ad4a7
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 47#include "musb_core.h" 48 49static const struct of_device_id musb_dsps_of_match[]; 50 51/** 52 * avoid using musb_readx()/musb_writex() as glue layer should not be 53 * dependent on musb core layer symbols. 54 */ 55static inline u8 dsps_readb(const void __iomem *addr, unsigned offset) 56 { return __raw_readb(addr + offset); } 57 58static inline u32 dsps_readl(const void __iomem *addr, unsigned offset) 59 { return __raw_readl(addr + offset); } 60 61static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data) 62 { __raw_writeb(data, addr + offset); } 63 64static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data) 65 { __raw_writel(data, addr + offset); } 66 67/** 68 * DSPS musb wrapper register offset. 69 * FIXME: This should be expanded to have all the wrapper registers from TI DSPS 70 * musb ips. 71 */ 72struct dsps_musb_wrapper { 73 u16 revision; 74 u16 control; 75 u16 status; 76 u16 epintr_set; 77 u16 epintr_clear; 78 u16 epintr_status; 79 u16 coreintr_set; 80 u16 coreintr_clear; 81 u16 coreintr_status; 82 u16 phy_utmi; 83 u16 mode; 84 85 /* bit positions for control */ 86 unsigned reset:5; 87 88 /* bit positions for interrupt */ 89 unsigned usb_shift:5; 90 u32 usb_mask; 91 u32 usb_bitmap; 92 unsigned drvvbus:5; 93 94 unsigned txep_shift:5; 95 u32 txep_mask; 96 u32 txep_bitmap; 97 98 unsigned rxep_shift:5; 99 u32 rxep_mask; 100 u32 rxep_bitmap; 101 102 /* bit positions for phy_utmi */ 103 unsigned otg_disable:5; 104 105 /* bit positions for mode */ 106 unsigned iddig:5; 107 /* miscellaneous stuff */ 108 u32 musb_core_offset; 109 u8 poll_seconds; 110 /* number of musb instances */ 111 u8 instances; 112}; 113 114/** 115 * DSPS glue structure. 116 */ 117struct dsps_glue { 118 struct device *dev; 119 struct platform_device *musb[2]; /* child musb pdev */ 120 const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ 121 struct timer_list timer[2]; /* otg_workaround timer */ 122 unsigned long last_timer[2]; /* last timer data for each instance */ 123}; 124 125/** 126 * dsps_musb_enable - enable interrupts 127 */ 128static void dsps_musb_enable(struct musb *musb) 129{ 130 struct device *dev = musb->controller; 131 struct platform_device *pdev = to_platform_device(dev->parent); 132 struct dsps_glue *glue = platform_get_drvdata(pdev); 133 const struct dsps_musb_wrapper *wrp = glue->wrp; 134 void __iomem *reg_base = musb->ctrl_base; 135 u32 epmask, coremask; 136 137 /* Workaround: setup IRQs through both register sets. */ 138 epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | 139 ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); 140 coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); 141 142 dsps_writel(reg_base, wrp->epintr_set, epmask); 143 dsps_writel(reg_base, wrp->coreintr_set, coremask); 144 /* Force the DRVVBUS IRQ so we can start polling for ID change. */ 145 dsps_writel(reg_base, wrp->coreintr_set, 146 (1 << wrp->drvvbus) << wrp->usb_shift); 147} 148 149/** 150 * dsps_musb_disable - disable HDRC and flush interrupts 151 */ 152static void dsps_musb_disable(struct musb *musb) 153{ 154 struct device *dev = musb->controller; 155 struct platform_device *pdev = to_platform_device(dev->parent); 156 struct dsps_glue *glue = platform_get_drvdata(pdev); 157 const struct dsps_musb_wrapper *wrp = glue->wrp; 158 void __iomem *reg_base = musb->ctrl_base; 159 160 dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); 161 dsps_writel(reg_base, wrp->epintr_clear, 162 wrp->txep_bitmap | wrp->rxep_bitmap); 163 dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); 164} 165 166static void otg_timer(unsigned long _musb) 167{ 168 struct musb *musb = (void *)_musb; 169 void __iomem *mregs = musb->mregs; 170 struct device *dev = musb->controller; 171 struct platform_device *pdev = to_platform_device(dev); 172 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 173 const struct dsps_musb_wrapper *wrp = glue->wrp; 174 u8 devctl; 175 unsigned long flags; 176 177 /* 178 * We poll because DSPS IP's won't expose several OTG-critical 179 * status change events (from the transceiver) otherwise. 180 */ 181 devctl = dsps_readb(mregs, MUSB_DEVCTL); 182 dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, 183 usb_otg_state_string(musb->xceiv->state)); 184 185 spin_lock_irqsave(&musb->lock, flags); 186 switch (musb->xceiv->state) { 187 case OTG_STATE_A_WAIT_BCON: 188 devctl &= ~MUSB_DEVCTL_SESSION; 189 dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl); 190 191 devctl = dsps_readb(musb->mregs, MUSB_DEVCTL); 192 if (devctl & MUSB_DEVCTL_BDEVICE) { 193 musb->xceiv->state = OTG_STATE_B_IDLE; 194 MUSB_DEV_MODE(musb); 195 } else { 196 musb->xceiv->state = OTG_STATE_A_IDLE; 197 MUSB_HST_MODE(musb); 198 } 199 break; 200 case OTG_STATE_A_WAIT_VFALL: 201 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; 202 dsps_writel(musb->ctrl_base, wrp->coreintr_set, 203 MUSB_INTR_VBUSERROR << wrp->usb_shift); 204 break; 205 case OTG_STATE_B_IDLE: 206 devctl = dsps_readb(mregs, MUSB_DEVCTL); 207 if (devctl & MUSB_DEVCTL_BDEVICE) 208 mod_timer(&glue->timer[pdev->id], 209 jiffies + wrp->poll_seconds * HZ); 210 else 211 musb->xceiv->state = OTG_STATE_A_IDLE; 212 break; 213 default: 214 break; 215 } 216 spin_unlock_irqrestore(&musb->lock, flags); 217} 218 219static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) 220{ 221 struct device *dev = musb->controller; 222 struct platform_device *pdev = to_platform_device(dev); 223 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 224 225 if (timeout == 0) 226 timeout = jiffies + msecs_to_jiffies(3); 227 228 /* Never idle if active, or when VBUS timeout is not set as host */ 229 if (musb->is_active || (musb->a_wait_bcon == 0 && 230 musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { 231 dev_dbg(musb->controller, "%s active, deleting timer\n", 232 usb_otg_state_string(musb->xceiv->state)); 233 del_timer(&glue->timer[pdev->id]); 234 glue->last_timer[pdev->id] = jiffies; 235 return; 236 } 237 238 if (time_after(glue->last_timer[pdev->id], timeout) && 239 timer_pending(&glue->timer[pdev->id])) { 240 dev_dbg(musb->controller, 241 "Longer idle timer already pending, ignoring...\n"); 242 return; 243 } 244 glue->last_timer[pdev->id] = timeout; 245 246 dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", 247 usb_otg_state_string(musb->xceiv->state), 248 jiffies_to_msecs(timeout - jiffies)); 249 mod_timer(&glue->timer[pdev->id], timeout); 250} 251 252static irqreturn_t dsps_interrupt(int irq, void *hci) 253{ 254 struct musb *musb = hci; 255 void __iomem *reg_base = musb->ctrl_base; 256 struct device *dev = musb->controller; 257 struct platform_device *pdev = to_platform_device(dev); 258 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 259 const struct dsps_musb_wrapper *wrp = glue->wrp; 260 unsigned long flags; 261 irqreturn_t ret = IRQ_NONE; 262 u32 epintr, usbintr; 263 264 spin_lock_irqsave(&musb->lock, flags); 265 266 /* Get endpoint interrupts */ 267 epintr = dsps_readl(reg_base, wrp->epintr_status); 268 musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; 269 musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; 270 271 if (epintr) 272 dsps_writel(reg_base, wrp->epintr_status, epintr); 273 274 /* Get usb core interrupts */ 275 usbintr = dsps_readl(reg_base, wrp->coreintr_status); 276 if (!usbintr && !epintr) 277 goto out; 278 279 musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; 280 if (usbintr) 281 dsps_writel(reg_base, wrp->coreintr_status, usbintr); 282 283 dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", 284 usbintr, epintr); 285 /* 286 * DRVVBUS IRQs are the only proxy we have (a very poor one!) for 287 * DSPS IP's missing ID change IRQ. We need an ID change IRQ to 288 * switch appropriately between halves of the OTG state machine. 289 * Managing DEVCTL.SESSION per Mentor docs requires that we know its 290 * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. 291 * Also, DRVVBUS pulses for SRP (but not at 5V) ... 292 */ 293 if (is_host_active(musb) && usbintr & MUSB_INTR_BABBLE) 294 pr_info("CAUTION: musb: Babble Interrupt Occurred\n"); 295 296 if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { 297 int drvvbus = dsps_readl(reg_base, wrp->status); 298 void __iomem *mregs = musb->mregs; 299 u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); 300 int err; 301 302 err = musb->int_usb & MUSB_INTR_VBUSERROR; 303 if (err) { 304 /* 305 * The Mentor core doesn't debounce VBUS as needed 306 * to cope with device connect current spikes. This 307 * means it's not uncommon for bus-powered devices 308 * to get VBUS errors during enumeration. 309 * 310 * This is a workaround, but newer RTL from Mentor 311 * seems to allow a better one: "re"-starting sessions 312 * without waiting for VBUS to stop registering in 313 * devctl. 314 */ 315 musb->int_usb &= ~MUSB_INTR_VBUSERROR; 316 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; 317 mod_timer(&glue->timer[pdev->id], 318 jiffies + wrp->poll_seconds * HZ); 319 WARNING("VBUS error workaround (delay coming)\n"); 320 } else if (drvvbus) { 321 musb->is_active = 1; 322 MUSB_HST_MODE(musb); 323 musb->xceiv->otg->default_a = 1; 324 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; 325 del_timer(&glue->timer[pdev->id]); 326 } else { 327 musb->is_active = 0; 328 MUSB_DEV_MODE(musb); 329 musb->xceiv->otg->default_a = 0; 330 musb->xceiv->state = OTG_STATE_B_IDLE; 331 } 332 333 /* NOTE: this must complete power-on within 100 ms. */ 334 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", 335 drvvbus ? "on" : "off", 336 usb_otg_state_string(musb->xceiv->state), 337 err ? " ERROR" : "", 338 devctl); 339 ret = IRQ_HANDLED; 340 } 341 342 if (musb->int_tx || musb->int_rx || musb->int_usb) 343 ret |= musb_interrupt(musb); 344 345 /* Poll for ID change */ 346 if (musb->xceiv->state == OTG_STATE_B_IDLE) 347 mod_timer(&glue->timer[pdev->id], 348 jiffies + wrp->poll_seconds * HZ); 349out: 350 spin_unlock_irqrestore(&musb->lock, flags); 351 352 return ret; 353} 354 355static int dsps_musb_init(struct musb *musb) 356{ 357 struct device *dev = musb->controller; 358 struct platform_device *pdev = to_platform_device(dev); 359 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 360 const struct dsps_musb_wrapper *wrp = glue->wrp; 361 void __iomem *reg_base = musb->ctrl_base; 362 u32 rev, val; 363 int status; 364 365 /* mentor core register starts at offset of 0x400 from musb base */ 366 musb->mregs += wrp->musb_core_offset; 367 368 /* NOP driver needs change if supporting dual instance */ 369 musb->xceiv = devm_usb_get_phy_by_phandle(glue->dev, "phys", 0); 370 if (IS_ERR_OR_NULL(musb->xceiv)) 371 return -EPROBE_DEFER; 372 373 /* Returns zero if e.g. not clocked */ 374 rev = dsps_readl(reg_base, wrp->revision); 375 if (!rev) { 376 status = -ENODEV; 377 goto err0; 378 } 379 380 usb_phy_init(musb->xceiv); 381 382 setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb); 383 384 /* Reset the musb */ 385 dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); 386 387 musb->isr = dsps_interrupt; 388 389 /* reset the otgdisable bit, needed for host mode to work */ 390 val = dsps_readl(reg_base, wrp->phy_utmi); 391 val &= ~(1 << wrp->otg_disable); 392 dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); 393 394 return 0; 395err0: 396 return status; 397} 398 399static int dsps_musb_exit(struct musb *musb) 400{ 401 struct device *dev = musb->controller; 402 struct platform_device *pdev = to_platform_device(dev); 403 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 404 405 del_timer_sync(&glue->timer[pdev->id]); 406 407 usb_phy_shutdown(musb->xceiv); 408 return 0; 409} 410 411static struct musb_platform_ops dsps_ops = { 412 .init = dsps_musb_init, 413 .exit = dsps_musb_exit, 414 415 .enable = dsps_musb_enable, 416 .disable = dsps_musb_disable, 417 418 .try_idle = dsps_musb_try_idle, 419}; 420 421static u64 musb_dmamask = DMA_BIT_MASK(32); 422 423static int dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) 424{ 425 struct device *dev = glue->dev; 426 struct platform_device *pdev = to_platform_device(dev); 427 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev); 428 struct device_node *np = pdev->dev.of_node; 429 struct musb_hdrc_config *config; 430 struct platform_device *musb; 431 struct resource *res; 432 struct resource resources[2]; 433 char res_name[11]; 434 int ret; 435 436 /* first resource is for usbss, so start index from 1 */ 437 res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1); 438 if (!res) { 439 dev_err(dev, "failed to get memory for instance %d\n", id); 440 ret = -ENODEV; 441 goto err0; 442 } 443 res->parent = NULL; 444 resources[0] = *res; 445 446 /* first resource is for usbss, so start index from 1 */ 447 res = platform_get_resource(pdev, IORESOURCE_IRQ, id + 1); 448 if (!res) { 449 dev_err(dev, "failed to get irq for instance %d\n", id); 450 ret = -ENODEV; 451 goto err0; 452 } 453 res->parent = NULL; 454 resources[1] = *res; 455 resources[1].name = "mc"; 456 457 /* allocate the child platform device */ 458 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); 459 if (!musb) { 460 dev_err(dev, "failed to allocate musb device\n"); 461 ret = -ENOMEM; 462 goto err0; 463 } 464 465 musb->dev.parent = dev; 466 musb->dev.dma_mask = &musb_dmamask; 467 musb->dev.coherent_dma_mask = musb_dmamask; 468 469 glue->musb[id] = musb; 470 471 ret = platform_device_add_resources(musb, resources, 2); 472 if (ret) { 473 dev_err(dev, "failed to add resources\n"); 474 goto err2; 475 } 476 477 if (np) { 478 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 479 if (!pdata) { 480 dev_err(&pdev->dev, 481 "failed to allocate musb platform data\n"); 482 ret = -ENOMEM; 483 goto err2; 484 } 485 486 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); 487 if (!config) { 488 dev_err(&pdev->dev, 489 "failed to allocate musb hdrc config\n"); 490 ret = -ENOMEM; 491 goto err2; 492 } 493 494 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); 495 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); 496 snprintf(res_name, sizeof(res_name), "port%d-mode", id); 497 of_property_read_u32(np, res_name, (u32 *)&pdata->mode); 498 of_property_read_u32(np, "power", (u32 *)&pdata->power); 499 config->multipoint = of_property_read_bool(np, "multipoint"); 500 501 pdata->config = config; 502 } 503 504 pdata->platform_ops = &dsps_ops; 505 506 ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); 507 if (ret) { 508 dev_err(dev, "failed to add platform_data\n"); 509 goto err2; 510 } 511 512 ret = platform_device_add(musb); 513 if (ret) { 514 dev_err(dev, "failed to register musb device\n"); 515 goto err2; 516 } 517 518 return 0; 519 520err2: 521 platform_device_put(musb); 522err0: 523 return ret; 524} 525 526static int dsps_probe(struct platform_device *pdev) 527{ 528 const struct of_device_id *match; 529 const struct dsps_musb_wrapper *wrp; 530 struct dsps_glue *glue; 531 struct resource *iomem; 532 int ret, i; 533 534 match = of_match_node(musb_dsps_of_match, pdev->dev.of_node); 535 if (!match) { 536 dev_err(&pdev->dev, "fail to get matching of_match struct\n"); 537 ret = -EINVAL; 538 goto err0; 539 } 540 wrp = match->data; 541 542 /* allocate glue */ 543 glue = kzalloc(sizeof(*glue), GFP_KERNEL); 544 if (!glue) { 545 dev_err(&pdev->dev, "unable to allocate glue memory\n"); 546 ret = -ENOMEM; 547 goto err0; 548 } 549 550 /* get memory resource */ 551 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 552 if (!iomem) { 553 dev_err(&pdev->dev, "failed to get usbss mem resourse\n"); 554 ret = -ENODEV; 555 goto err1; 556 } 557 558 glue->dev = &pdev->dev; 559 560 glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL); 561 if (!glue->wrp) { 562 dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n"); 563 ret = -ENOMEM; 564 goto err1; 565 } 566 platform_set_drvdata(pdev, glue); 567 568 /* enable the usbss clocks */ 569 pm_runtime_enable(&pdev->dev); 570 571 ret = pm_runtime_get_sync(&pdev->dev); 572 if (ret < 0) { 573 dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); 574 goto err2; 575 } 576 577 /* create the child platform device for all instances of musb */ 578 for (i = 0; i < wrp->instances ; i++) { 579 ret = dsps_create_musb_pdev(glue, i); 580 if (ret != 0) { 581 dev_err(&pdev->dev, "failed to create child pdev\n"); 582 /* release resources of previously created instances */ 583 for (i--; i >= 0 ; i--) 584 platform_device_unregister(glue->musb[i]); 585 goto err3; 586 } 587 } 588 589 return 0; 590 591err3: 592 pm_runtime_put(&pdev->dev); 593err2: 594 pm_runtime_disable(&pdev->dev); 595 kfree(glue->wrp); 596err1: 597 kfree(glue); 598err0: 599 return ret; 600} 601static int dsps_remove(struct platform_device *pdev) 602{ 603 struct dsps_glue *glue = platform_get_drvdata(pdev); 604 const struct dsps_musb_wrapper *wrp = glue->wrp; 605 int i; 606 607 /* delete the child platform device */ 608 for (i = 0; i < wrp->instances ; i++) 609 platform_device_unregister(glue->musb[i]); 610 611 /* disable usbss clocks */ 612 pm_runtime_put(&pdev->dev); 613 pm_runtime_disable(&pdev->dev); 614 kfree(glue->wrp); 615 kfree(glue); 616 return 0; 617} 618 619static const struct dsps_musb_wrapper am33xx_driver_data = { 620 .revision = 0x00, 621 .control = 0x14, 622 .status = 0x18, 623 .epintr_set = 0x38, 624 .epintr_clear = 0x40, 625 .epintr_status = 0x30, 626 .coreintr_set = 0x3c, 627 .coreintr_clear = 0x44, 628 .coreintr_status = 0x34, 629 .phy_utmi = 0xe0, 630 .mode = 0xe8, 631 .reset = 0, 632 .otg_disable = 21, 633 .iddig = 8, 634 .usb_shift = 0, 635 .usb_mask = 0x1ff, 636 .usb_bitmap = (0x1ff << 0), 637 .drvvbus = 8, 638 .txep_shift = 0, 639 .txep_mask = 0xffff, 640 .txep_bitmap = (0xffff << 0), 641 .rxep_shift = 16, 642 .rxep_mask = 0xfffe, 643 .rxep_bitmap = (0xfffe << 16), 644 .musb_core_offset = 0x400, 645 .poll_seconds = 2, 646 .instances = 1, 647}; 648 649static const struct of_device_id musb_dsps_of_match[] = { 650 { .compatible = "ti,musb-am33xx", 651 .data = (void *) &am33xx_driver_data, }, 652 { }, 653}; 654MODULE_DEVICE_TABLE(of, musb_dsps_of_match); 655 656static struct platform_driver dsps_usbss_driver = { 657 .probe = dsps_probe, 658 .remove = dsps_remove, 659 .driver = { 660 .name = "musb-dsps", 661 .of_match_table = of_match_ptr(musb_dsps_of_match), 662 }, 663}; 664 665MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); 666MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); 667MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); 668MODULE_LICENSE("GPL v2"); 669 670static int __init dsps_init(void) 671{ 672 return platform_driver_register(&dsps_usbss_driver); 673} 674subsys_initcall(dsps_init); 675 676static void __exit dsps_exit(void) 677{ 678 platform_driver_unregister(&dsps_usbss_driver); 679} 680module_exit(dsps_exit); 681