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->otg->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->otg->state = OTG_STATE_B_IDLE; 74 MUSB_DEV_MODE(musb); 75 } else { 76 musb->xceiv->otg->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->otg->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->otg->state = OTG_STATE_B_IDLE; 100 else 101 musb->xceiv->otg->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->otg->state == OTG_STATE_A_WAIT_BCON))) { 120 dev_dbg(musb->controller, "%s active, deleting timer\n", 121 usb_otg_state_string(musb->xceiv->otg->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->otg->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->otg->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) & 166 MUSB_DEVCTL_BDEVICE) { 167 168 mdelay(5); 169 cpu_relax(); 170 171 if (time_after(jiffies, timeout) 172 || loops-- <= 0) { 173 dev_err(musb->controller, 174 "configured as A device timeout"); 175 break; 176 } 177 } 178 179 otg_set_vbus(otg, 1); 180 } else { 181 musb->is_active = 1; 182 otg->default_a = 1; 183 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; 184 devctl |= MUSB_DEVCTL_SESSION; 185 MUSB_HST_MODE(musb); 186 } 187 } else { 188 musb->is_active = 0; 189 190 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and 191 * jumping right to B_IDLE... 192 */ 193 194 otg->default_a = 0; 195 musb->xceiv->otg->state = OTG_STATE_B_IDLE; 196 devctl &= ~MUSB_DEVCTL_SESSION; 197 198 MUSB_DEV_MODE(musb); 199 } 200 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 201 202 dev_dbg(musb->controller, "VBUS %s, devctl %02x " 203 /* otg %3x conf %08x prcm %08x */ "\n", 204 usb_otg_state_string(musb->xceiv->otg->state), 205 musb_readb(musb->mregs, MUSB_DEVCTL)); 206 } 207 208 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode) 209 { 210 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 211 212 devctl |= MUSB_DEVCTL_SESSION; 213 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 214 215 return 0; 216 } 217 218 static inline void omap2430_low_level_exit(struct musb *musb) 219 { 220 u32 l; 221 222 /* in any role */ 223 l = musb_readl(musb->mregs, OTG_FORCESTDBY); 224 l |= ENABLEFORCE; /* enable MSTANDBY */ 225 musb_writel(musb->mregs, OTG_FORCESTDBY, l); 226 } 227 228 static inline void omap2430_low_level_init(struct musb *musb) 229 { 230 u32 l; 231 232 l = musb_readl(musb->mregs, OTG_FORCESTDBY); 233 l &= ~ENABLEFORCE; /* disable MSTANDBY */ 234 musb_writel(musb->mregs, OTG_FORCESTDBY, l); 235 } 236 237 void omap_musb_mailbox(enum omap_musb_vbus_id_status status) 238 { 239 struct omap2430_glue *glue = _glue; 240 241 if (!glue) { 242 pr_err("%s: musb core is not yet initialized\n", __func__); 243 return; 244 } 245 glue->status = status; 246 247 if (!glue_to_musb(glue)) { 248 pr_err("%s: musb core is not yet ready\n", __func__); 249 return; 250 } 251 252 schedule_work(&glue->omap_musb_mailbox_work); 253 } 254 EXPORT_SYMBOL_GPL(omap_musb_mailbox); 255 256 static void omap_musb_set_mailbox(struct omap2430_glue *glue) 257 { 258 struct musb *musb = glue_to_musb(glue); 259 struct device *dev = musb->controller; 260 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev); 261 struct omap_musb_board_data *data = pdata->board_data; 262 struct usb_otg *otg = musb->xceiv->otg; 263 264 switch (glue->status) { 265 case OMAP_MUSB_ID_GROUND: 266 dev_dbg(dev, "ID GND\n"); 267 268 otg->default_a = true; 269 musb->xceiv->otg->state = OTG_STATE_A_IDLE; 270 musb->xceiv->last_event = USB_EVENT_ID; 271 if (musb->gadget_driver) { 272 pm_runtime_get_sync(dev); 273 omap_control_usb_set_mode(glue->control_otghs, 274 USB_MODE_HOST); 275 omap2430_musb_set_vbus(musb, 1); 276 } 277 break; 278 279 case OMAP_MUSB_VBUS_VALID: 280 dev_dbg(dev, "VBUS Connect\n"); 281 282 otg->default_a = false; 283 musb->xceiv->otg->state = OTG_STATE_B_IDLE; 284 musb->xceiv->last_event = USB_EVENT_VBUS; 285 if (musb->gadget_driver) 286 pm_runtime_get_sync(dev); 287 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE); 288 break; 289 290 case OMAP_MUSB_ID_FLOAT: 291 case OMAP_MUSB_VBUS_OFF: 292 dev_dbg(dev, "VBUS Disconnect\n"); 293 294 musb->xceiv->last_event = USB_EVENT_NONE; 295 if (musb->gadget_driver) { 296 omap2430_musb_set_vbus(musb, 0); 297 pm_runtime_mark_last_busy(dev); 298 pm_runtime_put_autosuspend(dev); 299 } 300 301 if (data->interface_type == MUSB_INTERFACE_UTMI) 302 otg_set_vbus(musb->xceiv->otg, 0); 303 304 omap_control_usb_set_mode(glue->control_otghs, 305 USB_MODE_DISCONNECT); 306 break; 307 default: 308 dev_dbg(dev, "ID float\n"); 309 } 310 311 atomic_notifier_call_chain(&musb->xceiv->notifier, 312 musb->xceiv->last_event, NULL); 313 } 314 315 316 static void omap_musb_mailbox_work(struct work_struct *mailbox_work) 317 { 318 struct omap2430_glue *glue = container_of(mailbox_work, 319 struct omap2430_glue, omap_musb_mailbox_work); 320 struct musb *musb = glue_to_musb(glue); 321 struct device *dev = musb->controller; 322 323 pm_runtime_get_sync(dev); 324 omap_musb_set_mailbox(glue); 325 pm_runtime_mark_last_busy(dev); 326 pm_runtime_put_autosuspend(dev); 327 } 328 329 static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci) 330 { 331 unsigned long flags; 332 irqreturn_t retval = IRQ_NONE; 333 struct musb *musb = __hci; 334 335 spin_lock_irqsave(&musb->lock, flags); 336 337 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); 338 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); 339 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); 340 341 if (musb->int_usb || musb->int_tx || musb->int_rx) 342 retval = musb_interrupt(musb); 343 344 spin_unlock_irqrestore(&musb->lock, flags); 345 346 return retval; 347 } 348 349 static int omap2430_musb_init(struct musb *musb) 350 { 351 u32 l; 352 int status = 0; 353 struct device *dev = musb->controller; 354 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 355 struct musb_hdrc_platform_data *plat = dev_get_platdata(dev); 356 struct omap_musb_board_data *data = plat->board_data; 357 358 /* We require some kind of external transceiver, hooked 359 * up through ULPI. TWL4030-family PMICs include one, 360 * which needs a driver, drivers aren't always needed. 361 */ 362 if (dev->parent->of_node) { 363 musb->phy = devm_phy_get(dev->parent, "usb2-phy"); 364 365 /* We can't totally remove musb->xceiv as of now because 366 * musb core uses xceiv.state and xceiv.otg. Once we have 367 * a separate state machine to handle otg, these can be moved 368 * out of xceiv and then we can start using the generic PHY 369 * framework 370 */ 371 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, 372 "usb-phy", 0); 373 } else { 374 musb->xceiv = devm_usb_get_phy_dev(dev, 0); 375 musb->phy = devm_phy_get(dev, "usb"); 376 } 377 378 if (IS_ERR(musb->xceiv)) { 379 status = PTR_ERR(musb->xceiv); 380 381 if (status == -ENXIO) 382 return status; 383 384 pr_err("HS USB OTG: no transceiver configured\n"); 385 return -EPROBE_DEFER; 386 } 387 388 if (IS_ERR(musb->phy)) { 389 pr_err("HS USB OTG: no PHY configured\n"); 390 return PTR_ERR(musb->phy); 391 } 392 musb->isr = omap2430_musb_interrupt; 393 394 /* 395 * Enable runtime PM for musb parent (this driver). We can't 396 * do it earlier as struct musb is not yet allocated and we 397 * need to touch the musb registers for runtime PM. 398 */ 399 pm_runtime_enable(glue->dev); 400 status = pm_runtime_get_sync(glue->dev); 401 if (status < 0) 402 goto err1; 403 404 status = pm_runtime_get_sync(dev); 405 if (status < 0) { 406 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status); 407 pm_runtime_put_sync(glue->dev); 408 goto err1; 409 } 410 411 l = musb_readl(musb->mregs, OTG_INTERFSEL); 412 413 if (data->interface_type == MUSB_INTERFACE_UTMI) { 414 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */ 415 l &= ~ULPI_12PIN; /* Disable ULPI */ 416 l |= UTMI_8BIT; /* Enable UTMI */ 417 } else { 418 l |= ULPI_12PIN; 419 } 420 421 musb_writel(musb->mregs, OTG_INTERFSEL, l); 422 423 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, " 424 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n", 425 musb_readl(musb->mregs, OTG_REVISION), 426 musb_readl(musb->mregs, OTG_SYSCONFIG), 427 musb_readl(musb->mregs, OTG_SYSSTATUS), 428 musb_readl(musb->mregs, OTG_INTERFSEL), 429 musb_readl(musb->mregs, OTG_SIMENABLE)); 430 431 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb); 432 433 if (glue->status != OMAP_MUSB_UNKNOWN) 434 omap_musb_set_mailbox(glue); 435 436 phy_init(musb->phy); 437 phy_power_on(musb->phy); 438 439 pm_runtime_put_noidle(musb->controller); 440 pm_runtime_put_noidle(glue->dev); 441 return 0; 442 443 err1: 444 return status; 445 } 446 447 static void omap2430_musb_enable(struct musb *musb) 448 { 449 u8 devctl; 450 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 451 struct device *dev = musb->controller; 452 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 453 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev); 454 struct omap_musb_board_data *data = pdata->board_data; 455 456 switch (glue->status) { 457 458 case OMAP_MUSB_ID_GROUND: 459 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST); 460 if (data->interface_type != MUSB_INTERFACE_UTMI) 461 break; 462 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 463 /* start the session */ 464 devctl |= MUSB_DEVCTL_SESSION; 465 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 466 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 467 MUSB_DEVCTL_BDEVICE) { 468 cpu_relax(); 469 470 if (time_after(jiffies, timeout)) { 471 dev_err(dev, "configured as A device timeout"); 472 break; 473 } 474 } 475 break; 476 477 case OMAP_MUSB_VBUS_VALID: 478 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE); 479 break; 480 481 default: 482 break; 483 } 484 } 485 486 static void omap2430_musb_disable(struct musb *musb) 487 { 488 struct device *dev = musb->controller; 489 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 490 491 if (glue->status != OMAP_MUSB_UNKNOWN) 492 omap_control_usb_set_mode(glue->control_otghs, 493 USB_MODE_DISCONNECT); 494 } 495 496 static int omap2430_musb_exit(struct musb *musb) 497 { 498 del_timer_sync(&musb_idle_timer); 499 500 omap2430_low_level_exit(musb); 501 phy_power_off(musb->phy); 502 phy_exit(musb->phy); 503 504 return 0; 505 } 506 507 static const struct musb_platform_ops omap2430_ops = { 508 .quirks = MUSB_DMA_INVENTRA, 509 #ifdef CONFIG_USB_INVENTRA_DMA 510 .dma_init = musbhs_dma_controller_create, 511 .dma_exit = musbhs_dma_controller_destroy, 512 #endif 513 .init = omap2430_musb_init, 514 .exit = omap2430_musb_exit, 515 516 .set_mode = omap2430_musb_set_mode, 517 .try_idle = omap2430_musb_try_idle, 518 519 .set_vbus = omap2430_musb_set_vbus, 520 521 .enable = omap2430_musb_enable, 522 .disable = omap2430_musb_disable, 523 }; 524 525 static u64 omap2430_dmamask = DMA_BIT_MASK(32); 526 527 static int omap2430_probe(struct platform_device *pdev) 528 { 529 struct resource musb_resources[3]; 530 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev); 531 struct omap_musb_board_data *data; 532 struct platform_device *musb; 533 struct omap2430_glue *glue; 534 struct device_node *np = pdev->dev.of_node; 535 struct musb_hdrc_config *config; 536 int ret = -ENOMEM, val; 537 538 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); 539 if (!glue) 540 goto err0; 541 542 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); 543 if (!musb) { 544 dev_err(&pdev->dev, "failed to allocate musb device\n"); 545 goto err0; 546 } 547 548 musb->dev.parent = &pdev->dev; 549 musb->dev.dma_mask = &omap2430_dmamask; 550 musb->dev.coherent_dma_mask = omap2430_dmamask; 551 552 glue->dev = &pdev->dev; 553 glue->musb = musb; 554 glue->status = OMAP_MUSB_UNKNOWN; 555 glue->control_otghs = ERR_PTR(-ENODEV); 556 557 if (np) { 558 struct device_node *control_node; 559 struct platform_device *control_pdev; 560 561 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 562 if (!pdata) 563 goto err2; 564 565 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 566 if (!data) 567 goto err2; 568 569 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); 570 if (!config) 571 goto err2; 572 573 of_property_read_u32(np, "mode", (u32 *)&pdata->mode); 574 of_property_read_u32(np, "interface-type", 575 (u32 *)&data->interface_type); 576 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); 577 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); 578 of_property_read_u32(np, "power", (u32 *)&pdata->power); 579 580 ret = of_property_read_u32(np, "multipoint", &val); 581 if (!ret && val) 582 config->multipoint = true; 583 584 pdata->board_data = data; 585 pdata->config = config; 586 587 control_node = of_parse_phandle(np, "ctrl-module", 0); 588 if (control_node) { 589 control_pdev = of_find_device_by_node(control_node); 590 if (!control_pdev) { 591 dev_err(&pdev->dev, "Failed to get control device\n"); 592 ret = -EINVAL; 593 goto err2; 594 } 595 glue->control_otghs = &control_pdev->dev; 596 } 597 } 598 pdata->platform_ops = &omap2430_ops; 599 600 platform_set_drvdata(pdev, glue); 601 602 /* 603 * REVISIT if we ever have two instances of the wrapper, we will be 604 * in big trouble 605 */ 606 _glue = glue; 607 608 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work); 609 610 memset(musb_resources, 0x00, sizeof(*musb_resources) * 611 ARRAY_SIZE(musb_resources)); 612 613 musb_resources[0].name = pdev->resource[0].name; 614 musb_resources[0].start = pdev->resource[0].start; 615 musb_resources[0].end = pdev->resource[0].end; 616 musb_resources[0].flags = pdev->resource[0].flags; 617 618 musb_resources[1].name = pdev->resource[1].name; 619 musb_resources[1].start = pdev->resource[1].start; 620 musb_resources[1].end = pdev->resource[1].end; 621 musb_resources[1].flags = pdev->resource[1].flags; 622 623 musb_resources[2].name = pdev->resource[2].name; 624 musb_resources[2].start = pdev->resource[2].start; 625 musb_resources[2].end = pdev->resource[2].end; 626 musb_resources[2].flags = pdev->resource[2].flags; 627 628 ret = platform_device_add_resources(musb, musb_resources, 629 ARRAY_SIZE(musb_resources)); 630 if (ret) { 631 dev_err(&pdev->dev, "failed to add resources\n"); 632 goto err2; 633 } 634 635 ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); 636 if (ret) { 637 dev_err(&pdev->dev, "failed to add platform_data\n"); 638 goto err2; 639 } 640 641 /* 642 * Note that we cannot enable PM runtime yet for this 643 * driver as we need struct musb initialized first. 644 * See omap2430_musb_init above. 645 */ 646 647 ret = platform_device_add(musb); 648 if (ret) { 649 dev_err(&pdev->dev, "failed to register musb device\n"); 650 goto err2; 651 } 652 653 return 0; 654 655 err2: 656 platform_device_put(musb); 657 658 err0: 659 return ret; 660 } 661 662 static int omap2430_remove(struct platform_device *pdev) 663 { 664 struct omap2430_glue *glue = platform_get_drvdata(pdev); 665 666 cancel_work_sync(&glue->omap_musb_mailbox_work); 667 platform_device_unregister(glue->musb); 668 669 return 0; 670 } 671 672 #ifdef CONFIG_PM 673 674 static int omap2430_runtime_suspend(struct device *dev) 675 { 676 struct omap2430_glue *glue = dev_get_drvdata(dev); 677 struct musb *musb = glue_to_musb(glue); 678 679 if (musb) { 680 musb->context.otg_interfsel = musb_readl(musb->mregs, 681 OTG_INTERFSEL); 682 683 omap2430_low_level_exit(musb); 684 } 685 686 return 0; 687 } 688 689 static int omap2430_runtime_resume(struct device *dev) 690 { 691 struct omap2430_glue *glue = dev_get_drvdata(dev); 692 struct musb *musb = glue_to_musb(glue); 693 694 if (!musb) 695 return -EPROBE_DEFER; 696 697 omap2430_low_level_init(musb); 698 musb_writel(musb->mregs, OTG_INTERFSEL, 699 musb->context.otg_interfsel); 700 701 return 0; 702 } 703 704 static struct dev_pm_ops omap2430_pm_ops = { 705 .runtime_suspend = omap2430_runtime_suspend, 706 .runtime_resume = omap2430_runtime_resume, 707 }; 708 709 #define DEV_PM_OPS (&omap2430_pm_ops) 710 #else 711 #define DEV_PM_OPS NULL 712 #endif 713 714 #ifdef CONFIG_OF 715 static const struct of_device_id omap2430_id_table[] = { 716 { 717 .compatible = "ti,omap4-musb" 718 }, 719 { 720 .compatible = "ti,omap3-musb" 721 }, 722 {}, 723 }; 724 MODULE_DEVICE_TABLE(of, omap2430_id_table); 725 #endif 726 727 static struct platform_driver omap2430_driver = { 728 .probe = omap2430_probe, 729 .remove = omap2430_remove, 730 .driver = { 731 .name = "musb-omap2430", 732 .pm = DEV_PM_OPS, 733 .of_match_table = of_match_ptr(omap2430_id_table), 734 }, 735 }; 736 737 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer"); 738 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 739 MODULE_LICENSE("GPL v2"); 740 741 static int __init omap2430_init(void) 742 { 743 return platform_driver_register(&omap2430_driver); 744 } 745 subsys_initcall(omap2430_init); 746 747 static void __exit omap2430_exit(void) 748 { 749 platform_driver_unregister(&omap2430_driver); 750 } 751 module_exit(omap2430_exit); 752