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/phy/omap_control_phy.h> 41 #include <linux/of_platform.h> 42 43 #include "musb_core.h" 44 #include "omap2430.h" 45 46 struct omap2430_glue { 47 struct device *dev; 48 struct platform_device *musb; 49 enum omap_musb_vbus_id_status status; 50 struct work_struct omap_musb_mailbox_work; 51 struct device *control_otghs; 52 }; 53 #define glue_to_musb(g) platform_get_drvdata(g->musb) 54 55 static struct omap2430_glue *_glue; 56 57 static struct timer_list musb_idle_timer; 58 59 static void musb_do_idle(unsigned long _musb) 60 { 61 struct musb *musb = (void *)_musb; 62 unsigned long flags; 63 u8 power; 64 u8 devctl; 65 66 spin_lock_irqsave(&musb->lock, flags); 67 68 switch (musb->xceiv->state) { 69 case OTG_STATE_A_WAIT_BCON: 70 71 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 72 if (devctl & MUSB_DEVCTL_BDEVICE) { 73 musb->xceiv->state = OTG_STATE_B_IDLE; 74 MUSB_DEV_MODE(musb); 75 } else { 76 musb->xceiv->state = OTG_STATE_A_IDLE; 77 MUSB_HST_MODE(musb); 78 } 79 break; 80 case OTG_STATE_A_SUSPEND: 81 /* finish RESUME signaling? */ 82 if (musb->port1_status & MUSB_PORT_STAT_RESUME) { 83 power = musb_readb(musb->mregs, MUSB_POWER); 84 power &= ~MUSB_POWER_RESUME; 85 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power); 86 musb_writeb(musb->mregs, MUSB_POWER, power); 87 musb->is_active = 1; 88 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND 89 | MUSB_PORT_STAT_RESUME); 90 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16; 91 usb_hcd_poll_rh_status(musb->hcd); 92 /* NOTE: it might really be A_WAIT_BCON ... */ 93 musb->xceiv->state = OTG_STATE_A_HOST; 94 } 95 break; 96 case OTG_STATE_A_HOST: 97 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 98 if (devctl & MUSB_DEVCTL_BDEVICE) 99 musb->xceiv->state = OTG_STATE_B_IDLE; 100 else 101 musb->xceiv->state = OTG_STATE_A_WAIT_BCON; 102 default: 103 break; 104 } 105 spin_unlock_irqrestore(&musb->lock, flags); 106 } 107 108 109 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout) 110 { 111 unsigned long default_timeout = jiffies + msecs_to_jiffies(3); 112 static unsigned long last_timer; 113 114 if (timeout == 0) 115 timeout = default_timeout; 116 117 /* Never idle if active, or when VBUS timeout is not set as host */ 118 if (musb->is_active || ((musb->a_wait_bcon == 0) 119 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) { 120 dev_dbg(musb->controller, "%s active, deleting timer\n", 121 usb_otg_state_string(musb->xceiv->state)); 122 del_timer(&musb_idle_timer); 123 last_timer = jiffies; 124 return; 125 } 126 127 if (time_after(last_timer, timeout)) { 128 if (!timer_pending(&musb_idle_timer)) 129 last_timer = timeout; 130 else { 131 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n"); 132 return; 133 } 134 } 135 last_timer = timeout; 136 137 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n", 138 usb_otg_state_string(musb->xceiv->state), 139 (unsigned long)jiffies_to_msecs(timeout - jiffies)); 140 mod_timer(&musb_idle_timer, timeout); 141 } 142 143 static void omap2430_musb_set_vbus(struct musb *musb, int is_on) 144 { 145 struct usb_otg *otg = musb->xceiv->otg; 146 u8 devctl; 147 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 148 /* HDRC controls CPEN, but beware current surges during device 149 * connect. They can trigger transient overcurrent conditions 150 * that must be ignored. 151 */ 152 153 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 154 155 if (is_on) { 156 if (musb->xceiv->state == OTG_STATE_A_IDLE) { 157 int loops = 100; 158 /* start the session */ 159 devctl |= MUSB_DEVCTL_SESSION; 160 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 161 /* 162 * Wait for the musb to set as A device to enable the 163 * VBUS 164 */ 165 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) { 166 167 mdelay(5); 168 cpu_relax(); 169 170 if (time_after(jiffies, timeout) 171 || loops-- <= 0) { 172 dev_err(musb->controller, 173 "configured as A device timeout"); 174 break; 175 } 176 } 177 178 otg_set_vbus(otg, 1); 179 } else { 180 musb->is_active = 1; 181 otg->default_a = 1; 182 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; 183 devctl |= MUSB_DEVCTL_SESSION; 184 MUSB_HST_MODE(musb); 185 } 186 } else { 187 musb->is_active = 0; 188 189 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and 190 * jumping right to B_IDLE... 191 */ 192 193 otg->default_a = 0; 194 musb->xceiv->state = OTG_STATE_B_IDLE; 195 devctl &= ~MUSB_DEVCTL_SESSION; 196 197 MUSB_DEV_MODE(musb); 198 } 199 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 200 201 dev_dbg(musb->controller, "VBUS %s, devctl %02x " 202 /* otg %3x conf %08x prcm %08x */ "\n", 203 usb_otg_state_string(musb->xceiv->state), 204 musb_readb(musb->mregs, MUSB_DEVCTL)); 205 } 206 207 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode) 208 { 209 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 210 211 devctl |= MUSB_DEVCTL_SESSION; 212 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 213 214 return 0; 215 } 216 217 static inline void omap2430_low_level_exit(struct musb *musb) 218 { 219 u32 l; 220 221 /* in any role */ 222 l = musb_readl(musb->mregs, OTG_FORCESTDBY); 223 l |= ENABLEFORCE; /* enable MSTANDBY */ 224 musb_writel(musb->mregs, OTG_FORCESTDBY, l); 225 } 226 227 static inline void omap2430_low_level_init(struct musb *musb) 228 { 229 u32 l; 230 231 l = musb_readl(musb->mregs, OTG_FORCESTDBY); 232 l &= ~ENABLEFORCE; /* disable MSTANDBY */ 233 musb_writel(musb->mregs, OTG_FORCESTDBY, l); 234 } 235 236 void omap_musb_mailbox(enum omap_musb_vbus_id_status status) 237 { 238 struct omap2430_glue *glue = _glue; 239 240 if (!glue) { 241 pr_err("%s: musb core is not yet initialized\n", __func__); 242 return; 243 } 244 glue->status = status; 245 246 if (!glue_to_musb(glue)) { 247 pr_err("%s: musb core is not yet ready\n", __func__); 248 return; 249 } 250 251 schedule_work(&glue->omap_musb_mailbox_work); 252 } 253 EXPORT_SYMBOL_GPL(omap_musb_mailbox); 254 255 static void omap_musb_set_mailbox(struct omap2430_glue *glue) 256 { 257 struct musb *musb = glue_to_musb(glue); 258 struct device *dev = musb->controller; 259 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev); 260 struct omap_musb_board_data *data = pdata->board_data; 261 struct usb_otg *otg = musb->xceiv->otg; 262 263 switch (glue->status) { 264 case OMAP_MUSB_ID_GROUND: 265 dev_dbg(dev, "ID GND\n"); 266 267 otg->default_a = true; 268 musb->xceiv->state = OTG_STATE_A_IDLE; 269 musb->xceiv->last_event = USB_EVENT_ID; 270 if (musb->gadget_driver) { 271 pm_runtime_get_sync(dev); 272 omap_control_usb_set_mode(glue->control_otghs, 273 USB_MODE_HOST); 274 omap2430_musb_set_vbus(musb, 1); 275 } 276 break; 277 278 case OMAP_MUSB_VBUS_VALID: 279 dev_dbg(dev, "VBUS Connect\n"); 280 281 otg->default_a = false; 282 musb->xceiv->state = OTG_STATE_B_IDLE; 283 musb->xceiv->last_event = USB_EVENT_VBUS; 284 if (musb->gadget_driver) 285 pm_runtime_get_sync(dev); 286 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE); 287 break; 288 289 case OMAP_MUSB_ID_FLOAT: 290 case OMAP_MUSB_VBUS_OFF: 291 dev_dbg(dev, "VBUS Disconnect\n"); 292 293 musb->xceiv->last_event = USB_EVENT_NONE; 294 if (musb->gadget_driver) { 295 omap2430_musb_set_vbus(musb, 0); 296 pm_runtime_mark_last_busy(dev); 297 pm_runtime_put_autosuspend(dev); 298 } 299 300 if (data->interface_type == MUSB_INTERFACE_UTMI) 301 otg_set_vbus(musb->xceiv->otg, 0); 302 303 omap_control_usb_set_mode(glue->control_otghs, 304 USB_MODE_DISCONNECT); 305 break; 306 default: 307 dev_dbg(dev, "ID float\n"); 308 } 309 310 atomic_notifier_call_chain(&musb->xceiv->notifier, 311 musb->xceiv->last_event, NULL); 312 } 313 314 315 static void omap_musb_mailbox_work(struct work_struct *mailbox_work) 316 { 317 struct omap2430_glue *glue = container_of(mailbox_work, 318 struct omap2430_glue, omap_musb_mailbox_work); 319 struct musb *musb = glue_to_musb(glue); 320 struct device *dev = musb->controller; 321 322 pm_runtime_get_sync(dev); 323 omap_musb_set_mailbox(glue); 324 pm_runtime_mark_last_busy(dev); 325 pm_runtime_put_autosuspend(dev); 326 } 327 328 static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci) 329 { 330 unsigned long flags; 331 irqreturn_t retval = IRQ_NONE; 332 struct musb *musb = __hci; 333 334 spin_lock_irqsave(&musb->lock, flags); 335 336 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); 337 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); 338 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); 339 340 if (musb->int_usb || musb->int_tx || musb->int_rx) 341 retval = musb_interrupt(musb); 342 343 spin_unlock_irqrestore(&musb->lock, flags); 344 345 return retval; 346 } 347 348 static int omap2430_musb_init(struct musb *musb) 349 { 350 u32 l; 351 int status = 0; 352 struct device *dev = musb->controller; 353 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 354 struct musb_hdrc_platform_data *plat = dev_get_platdata(dev); 355 struct omap_musb_board_data *data = plat->board_data; 356 357 /* We require some kind of external transceiver, hooked 358 * up through ULPI. TWL4030-family PMICs include one, 359 * which needs a driver, drivers aren't always needed. 360 */ 361 if (dev->parent->of_node) { 362 musb->phy = devm_phy_get(dev->parent, "usb2-phy"); 363 364 /* We can't totally remove musb->xceiv as of now because 365 * musb core uses xceiv.state and xceiv.otg. Once we have 366 * a separate state machine to handle otg, these can be moved 367 * out of xceiv and then we can start using the generic PHY 368 * framework 369 */ 370 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, 371 "usb-phy", 0); 372 } else { 373 musb->xceiv = devm_usb_get_phy_dev(dev, 0); 374 musb->phy = devm_phy_get(dev, "usb"); 375 } 376 377 if (IS_ERR(musb->xceiv)) { 378 status = PTR_ERR(musb->xceiv); 379 380 if (status == -ENXIO) 381 return status; 382 383 pr_err("HS USB OTG: no transceiver configured\n"); 384 return -EPROBE_DEFER; 385 } 386 387 if (IS_ERR(musb->phy)) { 388 pr_err("HS USB OTG: no PHY configured\n"); 389 return PTR_ERR(musb->phy); 390 } 391 musb->isr = omap2430_musb_interrupt; 392 393 status = pm_runtime_get_sync(dev); 394 if (status < 0) { 395 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status); 396 goto err1; 397 } 398 399 l = musb_readl(musb->mregs, OTG_INTERFSEL); 400 401 if (data->interface_type == MUSB_INTERFACE_UTMI) { 402 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */ 403 l &= ~ULPI_12PIN; /* Disable ULPI */ 404 l |= UTMI_8BIT; /* Enable UTMI */ 405 } else { 406 l |= ULPI_12PIN; 407 } 408 409 musb_writel(musb->mregs, OTG_INTERFSEL, l); 410 411 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, " 412 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n", 413 musb_readl(musb->mregs, OTG_REVISION), 414 musb_readl(musb->mregs, OTG_SYSCONFIG), 415 musb_readl(musb->mregs, OTG_SYSSTATUS), 416 musb_readl(musb->mregs, OTG_INTERFSEL), 417 musb_readl(musb->mregs, OTG_SIMENABLE)); 418 419 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb); 420 421 if (glue->status != OMAP_MUSB_UNKNOWN) 422 omap_musb_set_mailbox(glue); 423 424 phy_init(musb->phy); 425 phy_power_on(musb->phy); 426 427 pm_runtime_put_noidle(musb->controller); 428 return 0; 429 430 err1: 431 return status; 432 } 433 434 static void omap2430_musb_enable(struct musb *musb) 435 { 436 u8 devctl; 437 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 438 struct device *dev = musb->controller; 439 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 440 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev); 441 struct omap_musb_board_data *data = pdata->board_data; 442 443 switch (glue->status) { 444 445 case OMAP_MUSB_ID_GROUND: 446 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST); 447 if (data->interface_type != MUSB_INTERFACE_UTMI) 448 break; 449 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 450 /* start the session */ 451 devctl |= MUSB_DEVCTL_SESSION; 452 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 453 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 454 MUSB_DEVCTL_BDEVICE) { 455 cpu_relax(); 456 457 if (time_after(jiffies, timeout)) { 458 dev_err(dev, "configured as A device timeout"); 459 break; 460 } 461 } 462 break; 463 464 case OMAP_MUSB_VBUS_VALID: 465 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE); 466 break; 467 468 default: 469 break; 470 } 471 } 472 473 static void omap2430_musb_disable(struct musb *musb) 474 { 475 struct device *dev = musb->controller; 476 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 477 478 if (glue->status != OMAP_MUSB_UNKNOWN) 479 omap_control_usb_set_mode(glue->control_otghs, 480 USB_MODE_DISCONNECT); 481 } 482 483 static int omap2430_musb_exit(struct musb *musb) 484 { 485 del_timer_sync(&musb_idle_timer); 486 487 omap2430_low_level_exit(musb); 488 phy_power_off(musb->phy); 489 phy_exit(musb->phy); 490 491 return 0; 492 } 493 494 static const struct musb_platform_ops omap2430_ops = { 495 .init = omap2430_musb_init, 496 .exit = omap2430_musb_exit, 497 498 .set_mode = omap2430_musb_set_mode, 499 .try_idle = omap2430_musb_try_idle, 500 501 .set_vbus = omap2430_musb_set_vbus, 502 503 .enable = omap2430_musb_enable, 504 .disable = omap2430_musb_disable, 505 }; 506 507 static u64 omap2430_dmamask = DMA_BIT_MASK(32); 508 509 static int omap2430_probe(struct platform_device *pdev) 510 { 511 struct resource musb_resources[3]; 512 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev); 513 struct omap_musb_board_data *data; 514 struct platform_device *musb; 515 struct omap2430_glue *glue; 516 struct device_node *np = pdev->dev.of_node; 517 struct musb_hdrc_config *config; 518 int ret = -ENOMEM; 519 520 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); 521 if (!glue) { 522 dev_err(&pdev->dev, "failed to allocate glue context\n"); 523 goto err0; 524 } 525 526 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); 527 if (!musb) { 528 dev_err(&pdev->dev, "failed to allocate musb device\n"); 529 goto err0; 530 } 531 532 musb->dev.parent = &pdev->dev; 533 musb->dev.dma_mask = &omap2430_dmamask; 534 musb->dev.coherent_dma_mask = omap2430_dmamask; 535 536 glue->dev = &pdev->dev; 537 glue->musb = musb; 538 glue->status = OMAP_MUSB_UNKNOWN; 539 glue->control_otghs = ERR_PTR(-ENODEV); 540 541 if (np) { 542 struct device_node *control_node; 543 struct platform_device *control_pdev; 544 545 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 546 if (!pdata) { 547 dev_err(&pdev->dev, 548 "failed to allocate musb platform data\n"); 549 goto err2; 550 } 551 552 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 553 if (!data) { 554 dev_err(&pdev->dev, 555 "failed to allocate musb board data\n"); 556 goto err2; 557 } 558 559 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); 560 if (!config) { 561 dev_err(&pdev->dev, 562 "failed to allocate musb hdrc config\n"); 563 goto err2; 564 } 565 566 of_property_read_u32(np, "mode", (u32 *)&pdata->mode); 567 of_property_read_u32(np, "interface-type", 568 (u32 *)&data->interface_type); 569 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); 570 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); 571 of_property_read_u32(np, "power", (u32 *)&pdata->power); 572 config->multipoint = of_property_read_bool(np, "multipoint"); 573 574 pdata->board_data = data; 575 pdata->config = config; 576 577 control_node = of_parse_phandle(np, "ctrl-module", 0); 578 if (control_node) { 579 control_pdev = of_find_device_by_node(control_node); 580 if (!control_pdev) { 581 dev_err(&pdev->dev, "Failed to get control device\n"); 582 ret = -EINVAL; 583 goto err2; 584 } 585 glue->control_otghs = &control_pdev->dev; 586 } 587 } 588 pdata->platform_ops = &omap2430_ops; 589 590 platform_set_drvdata(pdev, glue); 591 592 /* 593 * REVISIT if we ever have two instances of the wrapper, we will be 594 * in big trouble 595 */ 596 _glue = glue; 597 598 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work); 599 600 memset(musb_resources, 0x00, sizeof(*musb_resources) * 601 ARRAY_SIZE(musb_resources)); 602 603 musb_resources[0].name = pdev->resource[0].name; 604 musb_resources[0].start = pdev->resource[0].start; 605 musb_resources[0].end = pdev->resource[0].end; 606 musb_resources[0].flags = pdev->resource[0].flags; 607 608 musb_resources[1].name = pdev->resource[1].name; 609 musb_resources[1].start = pdev->resource[1].start; 610 musb_resources[1].end = pdev->resource[1].end; 611 musb_resources[1].flags = pdev->resource[1].flags; 612 613 musb_resources[2].name = pdev->resource[2].name; 614 musb_resources[2].start = pdev->resource[2].start; 615 musb_resources[2].end = pdev->resource[2].end; 616 musb_resources[2].flags = pdev->resource[2].flags; 617 618 ret = platform_device_add_resources(musb, musb_resources, 619 ARRAY_SIZE(musb_resources)); 620 if (ret) { 621 dev_err(&pdev->dev, "failed to add resources\n"); 622 goto err2; 623 } 624 625 ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); 626 if (ret) { 627 dev_err(&pdev->dev, "failed to add platform_data\n"); 628 goto err2; 629 } 630 631 pm_runtime_enable(&pdev->dev); 632 633 ret = platform_device_add(musb); 634 if (ret) { 635 dev_err(&pdev->dev, "failed to register musb device\n"); 636 goto err2; 637 } 638 639 return 0; 640 641 err2: 642 platform_device_put(musb); 643 644 err0: 645 return ret; 646 } 647 648 static int omap2430_remove(struct platform_device *pdev) 649 { 650 struct omap2430_glue *glue = platform_get_drvdata(pdev); 651 652 cancel_work_sync(&glue->omap_musb_mailbox_work); 653 platform_device_unregister(glue->musb); 654 655 return 0; 656 } 657 658 #ifdef CONFIG_PM 659 660 static int omap2430_runtime_suspend(struct device *dev) 661 { 662 struct omap2430_glue *glue = dev_get_drvdata(dev); 663 struct musb *musb = glue_to_musb(glue); 664 665 if (musb) { 666 musb->context.otg_interfsel = musb_readl(musb->mregs, 667 OTG_INTERFSEL); 668 669 omap2430_low_level_exit(musb); 670 } 671 672 return 0; 673 } 674 675 static int omap2430_runtime_resume(struct device *dev) 676 { 677 struct omap2430_glue *glue = dev_get_drvdata(dev); 678 struct musb *musb = glue_to_musb(glue); 679 680 if (musb) { 681 omap2430_low_level_init(musb); 682 musb_writel(musb->mregs, OTG_INTERFSEL, 683 musb->context.otg_interfsel); 684 } 685 686 return 0; 687 } 688 689 static struct dev_pm_ops omap2430_pm_ops = { 690 .runtime_suspend = omap2430_runtime_suspend, 691 .runtime_resume = omap2430_runtime_resume, 692 }; 693 694 #define DEV_PM_OPS (&omap2430_pm_ops) 695 #else 696 #define DEV_PM_OPS NULL 697 #endif 698 699 #ifdef CONFIG_OF 700 static const struct of_device_id omap2430_id_table[] = { 701 { 702 .compatible = "ti,omap4-musb" 703 }, 704 { 705 .compatible = "ti,omap3-musb" 706 }, 707 {}, 708 }; 709 MODULE_DEVICE_TABLE(of, omap2430_id_table); 710 #endif 711 712 static struct platform_driver omap2430_driver = { 713 .probe = omap2430_probe, 714 .remove = omap2430_remove, 715 .driver = { 716 .name = "musb-omap2430", 717 .pm = DEV_PM_OPS, 718 .of_match_table = of_match_ptr(omap2430_id_table), 719 }, 720 }; 721 722 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer"); 723 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 724 MODULE_LICENSE("GPL v2"); 725 726 static int __init omap2430_init(void) 727 { 728 return platform_driver_register(&omap2430_driver); 729 } 730 subsys_initcall(omap2430_init); 731 732 static void __exit omap2430_exit(void) 733 { 734 platform_driver_unregister(&omap2430_driver); 735 } 736 module_exit(omap2430_exit); 737