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 #define __UBOOT__ 28 #ifndef __UBOOT__ 29 #include <linux/module.h> 30 #include <linux/kernel.h> 31 #include <linux/sched.h> 32 #include <linux/init.h> 33 #include <linux/list.h> 34 #include <linux/io.h> 35 #include <linux/platform_device.h> 36 #include <linux/dma-mapping.h> 37 #include <linux/pm_runtime.h> 38 #include <linux/err.h> 39 #include <linux/usb/musb-omap.h> 40 #else 41 #include <common.h> 42 #include <asm/omap_musb.h> 43 #include <twl4030.h> 44 #include "linux-compat.h" 45 #endif 46 47 #include "musb_core.h" 48 #include "omap2430.h" 49 50 #ifndef __UBOOT__ 51 struct omap2430_glue { 52 struct device *dev; 53 struct platform_device *musb; 54 enum omap_musb_vbus_id_status status; 55 struct work_struct omap_musb_mailbox_work; 56 }; 57 #define glue_to_musb(g) platform_get_drvdata(g->musb) 58 59 struct omap2430_glue *_glue; 60 61 static struct timer_list musb_idle_timer; 62 63 static void musb_do_idle(unsigned long _musb) 64 { 65 struct musb *musb = (void *)_musb; 66 unsigned long flags; 67 u8 power; 68 u8 devctl; 69 70 spin_lock_irqsave(&musb->lock, flags); 71 72 switch (musb->xceiv->state) { 73 case OTG_STATE_A_WAIT_BCON: 74 75 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 76 if (devctl & MUSB_DEVCTL_BDEVICE) { 77 musb->xceiv->state = OTG_STATE_B_IDLE; 78 MUSB_DEV_MODE(musb); 79 } else { 80 musb->xceiv->state = OTG_STATE_A_IDLE; 81 MUSB_HST_MODE(musb); 82 } 83 break; 84 case OTG_STATE_A_SUSPEND: 85 /* finish RESUME signaling? */ 86 if (musb->port1_status & MUSB_PORT_STAT_RESUME) { 87 power = musb_readb(musb->mregs, MUSB_POWER); 88 power &= ~MUSB_POWER_RESUME; 89 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power); 90 musb_writeb(musb->mregs, MUSB_POWER, power); 91 musb->is_active = 1; 92 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND 93 | MUSB_PORT_STAT_RESUME); 94 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16; 95 usb_hcd_poll_rh_status(musb_to_hcd(musb)); 96 /* NOTE: it might really be A_WAIT_BCON ... */ 97 musb->xceiv->state = OTG_STATE_A_HOST; 98 } 99 break; 100 case OTG_STATE_A_HOST: 101 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 102 if (devctl & MUSB_DEVCTL_BDEVICE) 103 musb->xceiv->state = OTG_STATE_B_IDLE; 104 else 105 musb->xceiv->state = OTG_STATE_A_WAIT_BCON; 106 default: 107 break; 108 } 109 spin_unlock_irqrestore(&musb->lock, flags); 110 } 111 112 113 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout) 114 { 115 unsigned long default_timeout = jiffies + msecs_to_jiffies(3); 116 static unsigned long last_timer; 117 118 if (timeout == 0) 119 timeout = default_timeout; 120 121 /* Never idle if active, or when VBUS timeout is not set as host */ 122 if (musb->is_active || ((musb->a_wait_bcon == 0) 123 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) { 124 dev_dbg(musb->controller, "%s active, deleting timer\n", 125 otg_state_string(musb->xceiv->state)); 126 del_timer(&musb_idle_timer); 127 last_timer = jiffies; 128 return; 129 } 130 131 if (time_after(last_timer, timeout)) { 132 if (!timer_pending(&musb_idle_timer)) 133 last_timer = timeout; 134 else { 135 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n"); 136 return; 137 } 138 } 139 last_timer = timeout; 140 141 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n", 142 otg_state_string(musb->xceiv->state), 143 (unsigned long)jiffies_to_msecs(timeout - jiffies)); 144 mod_timer(&musb_idle_timer, timeout); 145 } 146 147 static void omap2430_musb_set_vbus(struct musb *musb, int is_on) 148 { 149 struct usb_otg *otg = musb->xceiv->otg; 150 u8 devctl; 151 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 152 int ret = 1; 153 /* HDRC controls CPEN, but beware current surges during device 154 * connect. They can trigger transient overcurrent conditions 155 * that must be ignored. 156 */ 157 158 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 159 160 if (is_on) { 161 if (musb->xceiv->state == OTG_STATE_A_IDLE) { 162 /* start the session */ 163 devctl |= MUSB_DEVCTL_SESSION; 164 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 165 /* 166 * Wait for the musb to set as A device to enable the 167 * VBUS 168 */ 169 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) { 170 171 cpu_relax(); 172 173 if (time_after(jiffies, timeout)) { 174 dev_err(musb->controller, 175 "configured as A device timeout"); 176 ret = -EINVAL; 177 break; 178 } 179 } 180 181 if (ret && otg->set_vbus) 182 otg_set_vbus(otg, 1); 183 } else { 184 musb->is_active = 1; 185 otg->default_a = 1; 186 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; 187 devctl |= MUSB_DEVCTL_SESSION; 188 MUSB_HST_MODE(musb); 189 } 190 } else { 191 musb->is_active = 0; 192 193 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and 194 * jumping right to B_IDLE... 195 */ 196 197 otg->default_a = 0; 198 musb->xceiv->state = OTG_STATE_B_IDLE; 199 devctl &= ~MUSB_DEVCTL_SESSION; 200 201 MUSB_DEV_MODE(musb); 202 } 203 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 204 205 dev_dbg(musb->controller, "VBUS %s, devctl %02x " 206 /* otg %3x conf %08x prcm %08x */ "\n", 207 otg_state_string(musb->xceiv->state), 208 musb_readb(musb->mregs, MUSB_DEVCTL)); 209 } 210 211 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode) 212 { 213 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 214 215 devctl |= MUSB_DEVCTL_SESSION; 216 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 217 218 return 0; 219 } 220 #endif 221 222 static inline void omap2430_low_level_exit(struct musb *musb) 223 { 224 u32 l; 225 226 /* in any role */ 227 l = musb_readl(musb->mregs, OTG_FORCESTDBY); 228 l |= ENABLEFORCE; /* enable MSTANDBY */ 229 musb_writel(musb->mregs, OTG_FORCESTDBY, l); 230 } 231 232 static inline void omap2430_low_level_init(struct musb *musb) 233 { 234 u32 l; 235 236 l = musb_readl(musb->mregs, OTG_FORCESTDBY); 237 l &= ~ENABLEFORCE; /* disable MSTANDBY */ 238 musb_writel(musb->mregs, OTG_FORCESTDBY, l); 239 } 240 241 #ifndef __UBOOT__ 242 void omap_musb_mailbox(enum omap_musb_vbus_id_status status) 243 { 244 struct omap2430_glue *glue = _glue; 245 struct musb *musb = glue_to_musb(glue); 246 247 glue->status = status; 248 if (!musb) { 249 dev_err(glue->dev, "musb core is not yet ready\n"); 250 return; 251 } 252 253 schedule_work(&glue->omap_musb_mailbox_work); 254 } 255 EXPORT_SYMBOL_GPL(omap_musb_mailbox); 256 257 static void omap_musb_set_mailbox(struct omap2430_glue *glue) 258 { 259 struct musb *musb = glue_to_musb(glue); 260 struct device *dev = musb->controller; 261 struct musb_hdrc_platform_data *pdata = dev->platform_data; 262 struct omap_musb_board_data *data = pdata->board_data; 263 struct usb_otg *otg = musb->xceiv->otg; 264 265 switch (glue->status) { 266 case OMAP_MUSB_ID_GROUND: 267 dev_dbg(dev, "ID GND\n"); 268 269 otg->default_a = true; 270 musb->xceiv->state = OTG_STATE_A_IDLE; 271 musb->xceiv->last_event = USB_EVENT_ID; 272 if (!is_otg_enabled(musb) || musb->gadget_driver) { 273 pm_runtime_get_sync(dev); 274 usb_phy_init(musb->xceiv); 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->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 usb_phy_init(musb->xceiv); 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 (is_otg_enabled(musb) || is_peripheral_enabled(musb)) 296 if (musb->gadget_driver) { 297 pm_runtime_mark_last_busy(dev); 298 pm_runtime_put_autosuspend(dev); 299 } 300 301 if (data->interface_type == MUSB_INTERFACE_UTMI) { 302 if (musb->xceiv->otg->set_vbus) 303 otg_set_vbus(musb->xceiv->otg, 0); 304 } 305 usb_phy_shutdown(musb->xceiv); 306 break; 307 default: 308 dev_dbg(dev, "ID float\n"); 309 } 310 } 311 312 313 static void omap_musb_mailbox_work(struct work_struct *mailbox_work) 314 { 315 struct omap2430_glue *glue = container_of(mailbox_work, 316 struct omap2430_glue, omap_musb_mailbox_work); 317 omap_musb_set_mailbox(glue); 318 } 319 #endif 320 321 static int omap2430_musb_init(struct musb *musb) 322 { 323 u32 l; 324 int status = 0; 325 #ifndef __UBOOT__ 326 struct device *dev = musb->controller; 327 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 328 struct musb_hdrc_platform_data *plat = dev->platform_data; 329 struct omap_musb_board_data *data = plat->board_data; 330 #else 331 struct omap_musb_board_data *data = 332 (struct omap_musb_board_data *)musb->controller; 333 #endif 334 335 336 #ifndef __UBOOT__ 337 /* We require some kind of external transceiver, hooked 338 * up through ULPI. TWL4030-family PMICs include one, 339 * which needs a driver, drivers aren't always needed. 340 */ 341 musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); 342 if (IS_ERR_OR_NULL(musb->xceiv)) { 343 pr_err("HS USB OTG: no transceiver configured\n"); 344 return -ENODEV; 345 } 346 347 status = pm_runtime_get_sync(dev); 348 if (status < 0) { 349 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status); 350 goto err1; 351 } 352 #endif 353 354 l = musb_readl(musb->mregs, OTG_INTERFSEL); 355 356 if (data->interface_type == MUSB_INTERFACE_UTMI) { 357 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */ 358 l &= ~ULPI_12PIN; /* Disable ULPI */ 359 l |= UTMI_8BIT; /* Enable UTMI */ 360 } else { 361 l |= ULPI_12PIN; 362 } 363 364 musb_writel(musb->mregs, OTG_INTERFSEL, l); 365 366 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, " 367 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n", 368 musb_readl(musb->mregs, OTG_REVISION), 369 musb_readl(musb->mregs, OTG_SYSCONFIG), 370 musb_readl(musb->mregs, OTG_SYSSTATUS), 371 musb_readl(musb->mregs, OTG_INTERFSEL), 372 musb_readl(musb->mregs, OTG_SIMENABLE)); 373 374 #ifndef __UBOOT__ 375 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb); 376 377 if (glue->status != OMAP_MUSB_UNKNOWN) 378 omap_musb_set_mailbox(glue); 379 380 pm_runtime_put_noidle(musb->controller); 381 #endif 382 return 0; 383 384 err1: 385 return status; 386 } 387 388 static void omap2430_musb_enable(struct musb *musb) 389 { 390 #ifndef __UBOOT__ 391 u8 devctl; 392 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 393 struct device *dev = musb->controller; 394 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 395 struct musb_hdrc_platform_data *pdata = dev->platform_data; 396 struct omap_musb_board_data *data = pdata->board_data; 397 398 switch (glue->status) { 399 400 case OMAP_MUSB_ID_GROUND: 401 usb_phy_init(musb->xceiv); 402 if (data->interface_type != MUSB_INTERFACE_UTMI) 403 break; 404 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 405 /* start the session */ 406 devctl |= MUSB_DEVCTL_SESSION; 407 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 408 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 409 MUSB_DEVCTL_BDEVICE) { 410 cpu_relax(); 411 412 if (time_after(jiffies, timeout)) { 413 dev_err(dev, "configured as A device timeout"); 414 break; 415 } 416 } 417 break; 418 419 case OMAP_MUSB_VBUS_VALID: 420 usb_phy_init(musb->xceiv); 421 break; 422 423 default: 424 break; 425 } 426 #else 427 #ifdef CONFIG_TWL4030_USB 428 if (twl4030_usb_ulpi_init()) { 429 serial_printf("ERROR: %s Could not initialize PHY\n", 430 __PRETTY_FUNCTION__); 431 } 432 #endif 433 #endif 434 } 435 436 static void omap2430_musb_disable(struct musb *musb) 437 { 438 #ifndef __UBOOT__ 439 struct device *dev = musb->controller; 440 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 441 442 if (glue->status != OMAP_MUSB_UNKNOWN) 443 usb_phy_shutdown(musb->xceiv); 444 #endif 445 } 446 447 static int omap2430_musb_exit(struct musb *musb) 448 { 449 del_timer_sync(&musb_idle_timer); 450 451 omap2430_low_level_exit(musb); 452 453 return 0; 454 } 455 456 #ifndef __UBOOT__ 457 static const struct musb_platform_ops omap2430_ops = { 458 #else 459 const struct musb_platform_ops omap2430_ops = { 460 #endif 461 .init = omap2430_musb_init, 462 .exit = omap2430_musb_exit, 463 464 #ifndef __UBOOT__ 465 .set_mode = omap2430_musb_set_mode, 466 .try_idle = omap2430_musb_try_idle, 467 468 .set_vbus = omap2430_musb_set_vbus, 469 #endif 470 471 .enable = omap2430_musb_enable, 472 .disable = omap2430_musb_disable, 473 }; 474 475 #ifndef __UBOOT__ 476 static u64 omap2430_dmamask = DMA_BIT_MASK(32); 477 478 static int __devinit omap2430_probe(struct platform_device *pdev) 479 { 480 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; 481 struct platform_device *musb; 482 struct omap2430_glue *glue; 483 int ret = -ENOMEM; 484 485 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); 486 if (!glue) { 487 dev_err(&pdev->dev, "failed to allocate glue context\n"); 488 goto err0; 489 } 490 491 musb = platform_device_alloc("musb-hdrc", -1); 492 if (!musb) { 493 dev_err(&pdev->dev, "failed to allocate musb device\n"); 494 goto err0; 495 } 496 497 musb->dev.parent = &pdev->dev; 498 musb->dev.dma_mask = &omap2430_dmamask; 499 musb->dev.coherent_dma_mask = omap2430_dmamask; 500 501 glue->dev = &pdev->dev; 502 glue->musb = musb; 503 glue->status = OMAP_MUSB_UNKNOWN; 504 505 pdata->platform_ops = &omap2430_ops; 506 507 platform_set_drvdata(pdev, glue); 508 509 /* 510 * REVISIT if we ever have two instances of the wrapper, we will be 511 * in big trouble 512 */ 513 _glue = glue; 514 515 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work); 516 517 ret = platform_device_add_resources(musb, pdev->resource, 518 pdev->num_resources); 519 if (ret) { 520 dev_err(&pdev->dev, "failed to add resources\n"); 521 goto err1; 522 } 523 524 ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); 525 if (ret) { 526 dev_err(&pdev->dev, "failed to add platform_data\n"); 527 goto err1; 528 } 529 530 pm_runtime_enable(&pdev->dev); 531 532 ret = platform_device_add(musb); 533 if (ret) { 534 dev_err(&pdev->dev, "failed to register musb device\n"); 535 goto err1; 536 } 537 538 return 0; 539 540 err1: 541 platform_device_put(musb); 542 543 err0: 544 return ret; 545 } 546 547 static int __devexit omap2430_remove(struct platform_device *pdev) 548 { 549 struct omap2430_glue *glue = platform_get_drvdata(pdev); 550 551 cancel_work_sync(&glue->omap_musb_mailbox_work); 552 platform_device_del(glue->musb); 553 platform_device_put(glue->musb); 554 555 return 0; 556 } 557 558 #ifdef CONFIG_PM 559 560 static int omap2430_runtime_suspend(struct device *dev) 561 { 562 struct omap2430_glue *glue = dev_get_drvdata(dev); 563 struct musb *musb = glue_to_musb(glue); 564 565 if (musb) { 566 musb->context.otg_interfsel = musb_readl(musb->mregs, 567 OTG_INTERFSEL); 568 569 omap2430_low_level_exit(musb); 570 usb_phy_set_suspend(musb->xceiv, 1); 571 } 572 573 return 0; 574 } 575 576 static int omap2430_runtime_resume(struct device *dev) 577 { 578 struct omap2430_glue *glue = dev_get_drvdata(dev); 579 struct musb *musb = glue_to_musb(glue); 580 581 if (musb) { 582 omap2430_low_level_init(musb); 583 musb_writel(musb->mregs, OTG_INTERFSEL, 584 musb->context.otg_interfsel); 585 586 usb_phy_set_suspend(musb->xceiv, 0); 587 } 588 589 return 0; 590 } 591 592 static struct dev_pm_ops omap2430_pm_ops = { 593 .runtime_suspend = omap2430_runtime_suspend, 594 .runtime_resume = omap2430_runtime_resume, 595 }; 596 597 #define DEV_PM_OPS (&omap2430_pm_ops) 598 #else 599 #define DEV_PM_OPS NULL 600 #endif 601 602 static struct platform_driver omap2430_driver = { 603 .probe = omap2430_probe, 604 .remove = __devexit_p(omap2430_remove), 605 .driver = { 606 .name = "musb-omap2430", 607 .pm = DEV_PM_OPS, 608 }, 609 }; 610 611 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer"); 612 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 613 MODULE_LICENSE("GPL v2"); 614 615 static int __init omap2430_init(void) 616 { 617 return platform_driver_register(&omap2430_driver); 618 } 619 subsys_initcall(omap2430_init); 620 621 static void __exit omap2430_exit(void) 622 { 623 platform_driver_unregister(&omap2430_driver); 624 } 625 module_exit(omap2430_exit); 626 #endif 627