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.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 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 static void omap2430_musb_mailbox(enum 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 } 254 255 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 MUSB_ID_GROUND: 265 dev_dbg(dev, "ID GND\n"); 266 267 otg->default_a = true; 268 musb->xceiv->otg->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 MUSB_VBUS_VALID: 279 dev_dbg(dev, "VBUS Connect\n"); 280 281 otg->default_a = false; 282 musb->xceiv->otg->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 MUSB_ID_FLOAT: 290 case 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 /* 394 * Enable runtime PM for musb parent (this driver). We can't 395 * do it earlier as struct musb is not yet allocated and we 396 * need to touch the musb registers for runtime PM. 397 */ 398 pm_runtime_enable(glue->dev); 399 status = pm_runtime_get_sync(glue->dev); 400 if (status < 0) 401 goto err1; 402 403 status = pm_runtime_get_sync(dev); 404 if (status < 0) { 405 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status); 406 pm_runtime_put_sync(glue->dev); 407 goto err1; 408 } 409 410 l = musb_readl(musb->mregs, OTG_INTERFSEL); 411 412 if (data->interface_type == MUSB_INTERFACE_UTMI) { 413 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */ 414 l &= ~ULPI_12PIN; /* Disable ULPI */ 415 l |= UTMI_8BIT; /* Enable UTMI */ 416 } else { 417 l |= ULPI_12PIN; 418 } 419 420 musb_writel(musb->mregs, OTG_INTERFSEL, l); 421 422 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, " 423 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n", 424 musb_readl(musb->mregs, OTG_REVISION), 425 musb_readl(musb->mregs, OTG_SYSCONFIG), 426 musb_readl(musb->mregs, OTG_SYSSTATUS), 427 musb_readl(musb->mregs, OTG_INTERFSEL), 428 musb_readl(musb->mregs, OTG_SIMENABLE)); 429 430 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb); 431 432 if (glue->status != MUSB_UNKNOWN) 433 omap_musb_set_mailbox(glue); 434 435 phy_init(musb->phy); 436 phy_power_on(musb->phy); 437 438 pm_runtime_put_noidle(musb->controller); 439 pm_runtime_put_noidle(glue->dev); 440 return 0; 441 442 err1: 443 return status; 444 } 445 446 static void omap2430_musb_enable(struct musb *musb) 447 { 448 u8 devctl; 449 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 450 struct device *dev = musb->controller; 451 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 452 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev); 453 struct omap_musb_board_data *data = pdata->board_data; 454 455 switch (glue->status) { 456 457 case MUSB_ID_GROUND: 458 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST); 459 if (data->interface_type != MUSB_INTERFACE_UTMI) 460 break; 461 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 462 /* start the session */ 463 devctl |= MUSB_DEVCTL_SESSION; 464 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 465 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 466 MUSB_DEVCTL_BDEVICE) { 467 cpu_relax(); 468 469 if (time_after(jiffies, timeout)) { 470 dev_err(dev, "configured as A device timeout"); 471 break; 472 } 473 } 474 break; 475 476 case MUSB_VBUS_VALID: 477 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE); 478 break; 479 480 default: 481 break; 482 } 483 } 484 485 static void omap2430_musb_disable(struct musb *musb) 486 { 487 struct device *dev = musb->controller; 488 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 489 490 if (glue->status != MUSB_UNKNOWN) 491 omap_control_usb_set_mode(glue->control_otghs, 492 USB_MODE_DISCONNECT); 493 } 494 495 static int omap2430_musb_exit(struct musb *musb) 496 { 497 del_timer_sync(&musb_idle_timer); 498 499 omap2430_low_level_exit(musb); 500 phy_power_off(musb->phy); 501 phy_exit(musb->phy); 502 503 return 0; 504 } 505 506 static const struct musb_platform_ops omap2430_ops = { 507 .quirks = MUSB_DMA_INVENTRA, 508 #ifdef CONFIG_USB_INVENTRA_DMA 509 .dma_init = musbhs_dma_controller_create, 510 .dma_exit = musbhs_dma_controller_destroy, 511 #endif 512 .init = omap2430_musb_init, 513 .exit = omap2430_musb_exit, 514 515 .set_mode = omap2430_musb_set_mode, 516 .try_idle = omap2430_musb_try_idle, 517 518 .set_vbus = omap2430_musb_set_vbus, 519 520 .enable = omap2430_musb_enable, 521 .disable = omap2430_musb_disable, 522 523 .phy_callback = omap2430_musb_mailbox, 524 }; 525 526 static u64 omap2430_dmamask = DMA_BIT_MASK(32); 527 528 static int omap2430_probe(struct platform_device *pdev) 529 { 530 struct resource musb_resources[3]; 531 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev); 532 struct omap_musb_board_data *data; 533 struct platform_device *musb; 534 struct omap2430_glue *glue; 535 struct device_node *np = pdev->dev.of_node; 536 struct musb_hdrc_config *config; 537 int ret = -ENOMEM, val; 538 539 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); 540 if (!glue) 541 goto err0; 542 543 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); 544 if (!musb) { 545 dev_err(&pdev->dev, "failed to allocate musb device\n"); 546 goto err0; 547 } 548 549 musb->dev.parent = &pdev->dev; 550 musb->dev.dma_mask = &omap2430_dmamask; 551 musb->dev.coherent_dma_mask = omap2430_dmamask; 552 553 glue->dev = &pdev->dev; 554 glue->musb = musb; 555 glue->status = MUSB_UNKNOWN; 556 glue->control_otghs = ERR_PTR(-ENODEV); 557 558 if (np) { 559 struct device_node *control_node; 560 struct platform_device *control_pdev; 561 562 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 563 if (!pdata) 564 goto err2; 565 566 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 567 if (!data) 568 goto err2; 569 570 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); 571 if (!config) 572 goto err2; 573 574 of_property_read_u32(np, "mode", (u32 *)&pdata->mode); 575 of_property_read_u32(np, "interface-type", 576 (u32 *)&data->interface_type); 577 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); 578 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); 579 of_property_read_u32(np, "power", (u32 *)&pdata->power); 580 581 ret = of_property_read_u32(np, "multipoint", &val); 582 if (!ret && val) 583 config->multipoint = true; 584 585 pdata->board_data = data; 586 pdata->config = config; 587 588 control_node = of_parse_phandle(np, "ctrl-module", 0); 589 if (control_node) { 590 control_pdev = of_find_device_by_node(control_node); 591 if (!control_pdev) { 592 dev_err(&pdev->dev, "Failed to get control device\n"); 593 ret = -EINVAL; 594 goto err2; 595 } 596 glue->control_otghs = &control_pdev->dev; 597 } 598 } 599 pdata->platform_ops = &omap2430_ops; 600 601 platform_set_drvdata(pdev, glue); 602 603 /* 604 * REVISIT if we ever have two instances of the wrapper, we will be 605 * in big trouble 606 */ 607 _glue = glue; 608 609 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work); 610 611 memset(musb_resources, 0x00, sizeof(*musb_resources) * 612 ARRAY_SIZE(musb_resources)); 613 614 musb_resources[0].name = pdev->resource[0].name; 615 musb_resources[0].start = pdev->resource[0].start; 616 musb_resources[0].end = pdev->resource[0].end; 617 musb_resources[0].flags = pdev->resource[0].flags; 618 619 musb_resources[1].name = pdev->resource[1].name; 620 musb_resources[1].start = pdev->resource[1].start; 621 musb_resources[1].end = pdev->resource[1].end; 622 musb_resources[1].flags = pdev->resource[1].flags; 623 624 musb_resources[2].name = pdev->resource[2].name; 625 musb_resources[2].start = pdev->resource[2].start; 626 musb_resources[2].end = pdev->resource[2].end; 627 musb_resources[2].flags = pdev->resource[2].flags; 628 629 ret = platform_device_add_resources(musb, musb_resources, 630 ARRAY_SIZE(musb_resources)); 631 if (ret) { 632 dev_err(&pdev->dev, "failed to add resources\n"); 633 goto err2; 634 } 635 636 ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); 637 if (ret) { 638 dev_err(&pdev->dev, "failed to add platform_data\n"); 639 goto err2; 640 } 641 642 /* 643 * Note that we cannot enable PM runtime yet for this 644 * driver as we need struct musb initialized first. 645 * See omap2430_musb_init above. 646 */ 647 648 ret = platform_device_add(musb); 649 if (ret) { 650 dev_err(&pdev->dev, "failed to register musb device\n"); 651 goto err2; 652 } 653 654 return 0; 655 656 err2: 657 platform_device_put(musb); 658 659 err0: 660 return ret; 661 } 662 663 static int omap2430_remove(struct platform_device *pdev) 664 { 665 struct omap2430_glue *glue = platform_get_drvdata(pdev); 666 667 pm_runtime_get_sync(glue->dev); 668 cancel_work_sync(&glue->omap_musb_mailbox_work); 669 platform_device_unregister(glue->musb); 670 pm_runtime_put_sync(glue->dev); 671 pm_runtime_disable(glue->dev); 672 673 return 0; 674 } 675 676 #ifdef CONFIG_PM 677 678 static int omap2430_runtime_suspend(struct device *dev) 679 { 680 struct omap2430_glue *glue = dev_get_drvdata(dev); 681 struct musb *musb = glue_to_musb(glue); 682 683 if (musb) { 684 musb->context.otg_interfsel = musb_readl(musb->mregs, 685 OTG_INTERFSEL); 686 687 omap2430_low_level_exit(musb); 688 } 689 690 return 0; 691 } 692 693 static int omap2430_runtime_resume(struct device *dev) 694 { 695 struct omap2430_glue *glue = dev_get_drvdata(dev); 696 struct musb *musb = glue_to_musb(glue); 697 698 if (!musb) 699 return -EPROBE_DEFER; 700 701 omap2430_low_level_init(musb); 702 musb_writel(musb->mregs, OTG_INTERFSEL, 703 musb->context.otg_interfsel); 704 705 return 0; 706 } 707 708 static struct dev_pm_ops omap2430_pm_ops = { 709 .runtime_suspend = omap2430_runtime_suspend, 710 .runtime_resume = omap2430_runtime_resume, 711 }; 712 713 #define DEV_PM_OPS (&omap2430_pm_ops) 714 #else 715 #define DEV_PM_OPS NULL 716 #endif 717 718 #ifdef CONFIG_OF 719 static const struct of_device_id omap2430_id_table[] = { 720 { 721 .compatible = "ti,omap4-musb" 722 }, 723 { 724 .compatible = "ti,omap3-musb" 725 }, 726 {}, 727 }; 728 MODULE_DEVICE_TABLE(of, omap2430_id_table); 729 #endif 730 731 static struct platform_driver omap2430_driver = { 732 .probe = omap2430_probe, 733 .remove = omap2430_remove, 734 .driver = { 735 .name = "musb-omap2430", 736 .pm = DEV_PM_OPS, 737 .of_match_table = of_match_ptr(omap2430_id_table), 738 }, 739 }; 740 741 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer"); 742 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 743 MODULE_LICENSE("GPL v2"); 744 745 static int __init omap2430_init(void) 746 { 747 return platform_driver_register(&omap2430_driver); 748 } 749 subsys_initcall(omap2430_init); 750 751 static void __exit omap2430_exit(void) 752 { 753 platform_driver_unregister(&omap2430_driver); 754 } 755 module_exit(omap2430_exit); 756