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 * SPDX-License-Identifier: GPL-2.0 11 */ 12 #ifndef __UBOOT__ 13 #include <linux/module.h> 14 #include <linux/kernel.h> 15 #include <linux/sched.h> 16 #include <linux/init.h> 17 #include <linux/list.h> 18 #include <linux/io.h> 19 #include <linux/platform_device.h> 20 #include <linux/dma-mapping.h> 21 #include <linux/pm_runtime.h> 22 #include <linux/err.h> 23 #include <linux/usb/musb-omap.h> 24 #else 25 #include <common.h> 26 #include <asm/omap_common.h> 27 #include <asm/omap_musb.h> 28 #include <twl4030.h> 29 #include <twl6030.h> 30 #include "linux-compat.h" 31 #endif 32 33 #include "musb_core.h" 34 #include "omap2430.h" 35 36 #ifndef __UBOOT__ 37 struct omap2430_glue { 38 struct device *dev; 39 struct platform_device *musb; 40 enum omap_musb_vbus_id_status status; 41 struct work_struct omap_musb_mailbox_work; 42 }; 43 #define glue_to_musb(g) platform_get_drvdata(g->musb) 44 45 struct omap2430_glue *_glue; 46 47 static struct timer_list musb_idle_timer; 48 49 static void musb_do_idle(unsigned long _musb) 50 { 51 struct musb *musb = (void *)_musb; 52 unsigned long flags; 53 u8 power; 54 u8 devctl; 55 56 spin_lock_irqsave(&musb->lock, flags); 57 58 switch (musb->xceiv->state) { 59 case OTG_STATE_A_WAIT_BCON: 60 61 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 62 if (devctl & MUSB_DEVCTL_BDEVICE) { 63 musb->xceiv->state = OTG_STATE_B_IDLE; 64 MUSB_DEV_MODE(musb); 65 } else { 66 musb->xceiv->state = OTG_STATE_A_IDLE; 67 MUSB_HST_MODE(musb); 68 } 69 break; 70 case OTG_STATE_A_SUSPEND: 71 /* finish RESUME signaling? */ 72 if (musb->port1_status & MUSB_PORT_STAT_RESUME) { 73 power = musb_readb(musb->mregs, MUSB_POWER); 74 power &= ~MUSB_POWER_RESUME; 75 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power); 76 musb_writeb(musb->mregs, MUSB_POWER, power); 77 musb->is_active = 1; 78 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND 79 | MUSB_PORT_STAT_RESUME); 80 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16; 81 usb_hcd_poll_rh_status(musb_to_hcd(musb)); 82 /* NOTE: it might really be A_WAIT_BCON ... */ 83 musb->xceiv->state = OTG_STATE_A_HOST; 84 } 85 break; 86 case OTG_STATE_A_HOST: 87 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 88 if (devctl & MUSB_DEVCTL_BDEVICE) 89 musb->xceiv->state = OTG_STATE_B_IDLE; 90 else 91 musb->xceiv->state = OTG_STATE_A_WAIT_BCON; 92 default: 93 break; 94 } 95 spin_unlock_irqrestore(&musb->lock, flags); 96 } 97 98 99 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout) 100 { 101 unsigned long default_timeout = jiffies + msecs_to_jiffies(3); 102 static unsigned long last_timer; 103 104 if (timeout == 0) 105 timeout = default_timeout; 106 107 /* Never idle if active, or when VBUS timeout is not set as host */ 108 if (musb->is_active || ((musb->a_wait_bcon == 0) 109 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) { 110 dev_dbg(musb->controller, "%s active, deleting timer\n", 111 otg_state_string(musb->xceiv->state)); 112 del_timer(&musb_idle_timer); 113 last_timer = jiffies; 114 return; 115 } 116 117 if (time_after(last_timer, timeout)) { 118 if (!timer_pending(&musb_idle_timer)) 119 last_timer = timeout; 120 else { 121 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n"); 122 return; 123 } 124 } 125 last_timer = timeout; 126 127 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n", 128 otg_state_string(musb->xceiv->state), 129 (unsigned long)jiffies_to_msecs(timeout - jiffies)); 130 mod_timer(&musb_idle_timer, timeout); 131 } 132 133 static void omap2430_musb_set_vbus(struct musb *musb, int is_on) 134 { 135 struct usb_otg *otg = musb->xceiv->otg; 136 u8 devctl; 137 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 138 int ret = 1; 139 /* HDRC controls CPEN, but beware current surges during device 140 * connect. They can trigger transient overcurrent conditions 141 * that must be ignored. 142 */ 143 144 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 145 146 if (is_on) { 147 if (musb->xceiv->state == OTG_STATE_A_IDLE) { 148 /* start the session */ 149 devctl |= MUSB_DEVCTL_SESSION; 150 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 151 /* 152 * Wait for the musb to set as A device to enable the 153 * VBUS 154 */ 155 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) { 156 157 cpu_relax(); 158 159 if (time_after(jiffies, timeout)) { 160 dev_err(musb->controller, 161 "configured as A device timeout"); 162 ret = -EINVAL; 163 break; 164 } 165 } 166 167 if (ret && otg->set_vbus) 168 otg_set_vbus(otg, 1); 169 } else { 170 musb->is_active = 1; 171 otg->default_a = 1; 172 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; 173 devctl |= MUSB_DEVCTL_SESSION; 174 MUSB_HST_MODE(musb); 175 } 176 } else { 177 musb->is_active = 0; 178 179 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and 180 * jumping right to B_IDLE... 181 */ 182 183 otg->default_a = 0; 184 musb->xceiv->state = OTG_STATE_B_IDLE; 185 devctl &= ~MUSB_DEVCTL_SESSION; 186 187 MUSB_DEV_MODE(musb); 188 } 189 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 190 191 dev_dbg(musb->controller, "VBUS %s, devctl %02x " 192 /* otg %3x conf %08x prcm %08x */ "\n", 193 otg_state_string(musb->xceiv->state), 194 musb_readb(musb->mregs, MUSB_DEVCTL)); 195 } 196 197 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode) 198 { 199 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 200 201 devctl |= MUSB_DEVCTL_SESSION; 202 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 203 204 return 0; 205 } 206 #endif 207 208 static inline void omap2430_low_level_exit(struct musb *musb) 209 { 210 u32 l; 211 212 /* in any role */ 213 l = musb_readl(musb->mregs, OTG_FORCESTDBY); 214 l |= ENABLEFORCE; /* enable MSTANDBY */ 215 musb_writel(musb->mregs, OTG_FORCESTDBY, l); 216 } 217 218 static inline void omap2430_low_level_init(struct musb *musb) 219 { 220 u32 l; 221 222 l = musb_readl(musb->mregs, OTG_FORCESTDBY); 223 l &= ~ENABLEFORCE; /* disable MSTANDBY */ 224 musb_writel(musb->mregs, OTG_FORCESTDBY, l); 225 } 226 227 #ifndef __UBOOT__ 228 void omap_musb_mailbox(enum omap_musb_vbus_id_status status) 229 { 230 struct omap2430_glue *glue = _glue; 231 struct musb *musb = glue_to_musb(glue); 232 233 glue->status = status; 234 if (!musb) { 235 dev_err(glue->dev, "musb core is not yet ready\n"); 236 return; 237 } 238 239 schedule_work(&glue->omap_musb_mailbox_work); 240 } 241 EXPORT_SYMBOL_GPL(omap_musb_mailbox); 242 243 static void omap_musb_set_mailbox(struct omap2430_glue *glue) 244 { 245 struct musb *musb = glue_to_musb(glue); 246 struct device *dev = musb->controller; 247 struct musb_hdrc_platform_data *pdata = dev->platform_data; 248 struct omap_musb_board_data *data = pdata->board_data; 249 struct usb_otg *otg = musb->xceiv->otg; 250 251 switch (glue->status) { 252 case OMAP_MUSB_ID_GROUND: 253 dev_dbg(dev, "ID GND\n"); 254 255 otg->default_a = true; 256 musb->xceiv->state = OTG_STATE_A_IDLE; 257 musb->xceiv->last_event = USB_EVENT_ID; 258 if (!is_otg_enabled(musb) || musb->gadget_driver) { 259 pm_runtime_get_sync(dev); 260 usb_phy_init(musb->xceiv); 261 omap2430_musb_set_vbus(musb, 1); 262 } 263 break; 264 265 case OMAP_MUSB_VBUS_VALID: 266 dev_dbg(dev, "VBUS Connect\n"); 267 268 otg->default_a = false; 269 musb->xceiv->state = OTG_STATE_B_IDLE; 270 musb->xceiv->last_event = USB_EVENT_VBUS; 271 if (musb->gadget_driver) 272 pm_runtime_get_sync(dev); 273 usb_phy_init(musb->xceiv); 274 break; 275 276 case OMAP_MUSB_ID_FLOAT: 277 case OMAP_MUSB_VBUS_OFF: 278 dev_dbg(dev, "VBUS Disconnect\n"); 279 280 musb->xceiv->last_event = USB_EVENT_NONE; 281 if (is_otg_enabled(musb) || is_peripheral_enabled(musb)) 282 if (musb->gadget_driver) { 283 pm_runtime_mark_last_busy(dev); 284 pm_runtime_put_autosuspend(dev); 285 } 286 287 if (data->interface_type == MUSB_INTERFACE_UTMI) { 288 if (musb->xceiv->otg->set_vbus) 289 otg_set_vbus(musb->xceiv->otg, 0); 290 } 291 usb_phy_shutdown(musb->xceiv); 292 break; 293 default: 294 dev_dbg(dev, "ID float\n"); 295 } 296 } 297 298 299 static void omap_musb_mailbox_work(struct work_struct *mailbox_work) 300 { 301 struct omap2430_glue *glue = container_of(mailbox_work, 302 struct omap2430_glue, omap_musb_mailbox_work); 303 omap_musb_set_mailbox(glue); 304 } 305 #endif 306 307 static int omap2430_musb_init(struct musb *musb) 308 { 309 u32 l; 310 int status = 0; 311 unsigned long int start; 312 #ifndef __UBOOT__ 313 struct device *dev = musb->controller; 314 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 315 struct musb_hdrc_platform_data *plat = dev->platform_data; 316 struct omap_musb_board_data *data = plat->board_data; 317 #else 318 struct omap_musb_board_data *data = 319 (struct omap_musb_board_data *)musb->controller; 320 #endif 321 322 /* Reset the controller */ 323 musb_writel(musb->mregs, OTG_SYSCONFIG, SOFTRST); 324 325 start = get_timer(0); 326 327 while (1) { 328 l = musb_readl(musb->mregs, OTG_SYSCONFIG); 329 if ((l & SOFTRST) == 0) 330 break; 331 332 if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) { 333 dev_err(musb->controller, "MUSB reset is taking too long\n"); 334 return -ENODEV; 335 } 336 } 337 338 #ifndef __UBOOT__ 339 /* We require some kind of external transceiver, hooked 340 * up through ULPI. TWL4030-family PMICs include one, 341 * which needs a driver, drivers aren't always needed. 342 */ 343 musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); 344 if (IS_ERR_OR_NULL(musb->xceiv)) { 345 pr_err("HS USB OTG: no transceiver configured\n"); 346 return -ENODEV; 347 } 348 349 status = pm_runtime_get_sync(dev); 350 if (status < 0) { 351 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status); 352 goto err1; 353 } 354 #endif 355 356 l = musb_readl(musb->mregs, OTG_INTERFSEL); 357 358 if (data->interface_type == MUSB_INTERFACE_UTMI) { 359 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */ 360 l &= ~ULPI_12PIN; /* Disable ULPI */ 361 l |= UTMI_8BIT; /* Enable UTMI */ 362 } else { 363 l |= ULPI_12PIN; 364 } 365 366 musb_writel(musb->mregs, OTG_INTERFSEL, l); 367 368 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, " 369 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n", 370 musb_readl(musb->mregs, OTG_REVISION), 371 musb_readl(musb->mregs, OTG_SYSCONFIG), 372 musb_readl(musb->mregs, OTG_SYSSTATUS), 373 musb_readl(musb->mregs, OTG_INTERFSEL), 374 musb_readl(musb->mregs, OTG_SIMENABLE)); 375 376 #ifndef __UBOOT__ 377 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb); 378 379 if (glue->status != OMAP_MUSB_UNKNOWN) 380 omap_musb_set_mailbox(glue); 381 382 pm_runtime_put_noidle(musb->controller); 383 #endif 384 return 0; 385 386 err1: 387 return status; 388 } 389 390 #ifndef __UBOOT__ 391 static void omap2430_musb_enable(struct musb *musb) 392 #else 393 static int omap2430_musb_enable(struct musb *musb) 394 #endif 395 { 396 #ifndef __UBOOT__ 397 u8 devctl; 398 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 399 struct device *dev = musb->controller; 400 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 401 struct musb_hdrc_platform_data *pdata = dev->platform_data; 402 struct omap_musb_board_data *data = pdata->board_data; 403 404 switch (glue->status) { 405 406 case OMAP_MUSB_ID_GROUND: 407 usb_phy_init(musb->xceiv); 408 if (data->interface_type != MUSB_INTERFACE_UTMI) 409 break; 410 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 411 /* start the session */ 412 devctl |= MUSB_DEVCTL_SESSION; 413 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 414 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 415 MUSB_DEVCTL_BDEVICE) { 416 cpu_relax(); 417 418 if (time_after(jiffies, timeout)) { 419 dev_err(dev, "configured as A device timeout"); 420 break; 421 } 422 } 423 break; 424 425 case OMAP_MUSB_VBUS_VALID: 426 usb_phy_init(musb->xceiv); 427 break; 428 429 default: 430 break; 431 } 432 #else 433 #ifdef CONFIG_TWL4030_USB 434 if (twl4030_usb_ulpi_init()) { 435 serial_printf("ERROR: %s Could not initialize PHY\n", 436 __PRETTY_FUNCTION__); 437 } 438 #endif 439 440 #ifdef CONFIG_TWL6030_POWER 441 twl6030_usb_device_settings(); 442 #endif 443 444 #ifdef CONFIG_OMAP44XX 445 u32 *usbotghs_control = (u32 *)((*ctrl)->control_usbotghs_ctrl); 446 *usbotghs_control = USBOTGHS_CONTROL_AVALID | 447 USBOTGHS_CONTROL_VBUSVALID | USBOTGHS_CONTROL_IDDIG; 448 #endif 449 450 return 0; 451 #endif 452 } 453 454 static void omap2430_musb_disable(struct musb *musb) 455 { 456 #ifndef __UBOOT__ 457 struct device *dev = musb->controller; 458 struct omap2430_glue *glue = dev_get_drvdata(dev->parent); 459 460 if (glue->status != OMAP_MUSB_UNKNOWN) 461 usb_phy_shutdown(musb->xceiv); 462 #endif 463 } 464 465 static int omap2430_musb_exit(struct musb *musb) 466 { 467 del_timer_sync(&musb_idle_timer); 468 469 omap2430_low_level_exit(musb); 470 471 return 0; 472 } 473 474 #ifndef __UBOOT__ 475 static const struct musb_platform_ops omap2430_ops = { 476 #else 477 const struct musb_platform_ops omap2430_ops = { 478 #endif 479 .init = omap2430_musb_init, 480 .exit = omap2430_musb_exit, 481 482 #ifndef __UBOOT__ 483 .set_mode = omap2430_musb_set_mode, 484 .try_idle = omap2430_musb_try_idle, 485 486 .set_vbus = omap2430_musb_set_vbus, 487 #endif 488 489 .enable = omap2430_musb_enable, 490 .disable = omap2430_musb_disable, 491 }; 492 493 #ifndef __UBOOT__ 494 static u64 omap2430_dmamask = DMA_BIT_MASK(32); 495 496 static int __devinit omap2430_probe(struct platform_device *pdev) 497 { 498 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; 499 struct platform_device *musb; 500 struct omap2430_glue *glue; 501 int ret = -ENOMEM; 502 503 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); 504 if (!glue) { 505 dev_err(&pdev->dev, "failed to allocate glue context\n"); 506 goto err0; 507 } 508 509 musb = platform_device_alloc("musb-hdrc", -1); 510 if (!musb) { 511 dev_err(&pdev->dev, "failed to allocate musb device\n"); 512 goto err0; 513 } 514 515 musb->dev.parent = &pdev->dev; 516 musb->dev.dma_mask = &omap2430_dmamask; 517 musb->dev.coherent_dma_mask = omap2430_dmamask; 518 519 glue->dev = &pdev->dev; 520 glue->musb = musb; 521 glue->status = OMAP_MUSB_UNKNOWN; 522 523 pdata->platform_ops = &omap2430_ops; 524 525 platform_set_drvdata(pdev, glue); 526 527 /* 528 * REVISIT if we ever have two instances of the wrapper, we will be 529 * in big trouble 530 */ 531 _glue = glue; 532 533 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work); 534 535 ret = platform_device_add_resources(musb, pdev->resource, 536 pdev->num_resources); 537 if (ret) { 538 dev_err(&pdev->dev, "failed to add resources\n"); 539 goto err1; 540 } 541 542 ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); 543 if (ret) { 544 dev_err(&pdev->dev, "failed to add platform_data\n"); 545 goto err1; 546 } 547 548 pm_runtime_enable(&pdev->dev); 549 550 ret = platform_device_add(musb); 551 if (ret) { 552 dev_err(&pdev->dev, "failed to register musb device\n"); 553 goto err1; 554 } 555 556 return 0; 557 558 err1: 559 platform_device_put(musb); 560 561 err0: 562 return ret; 563 } 564 565 static int __devexit omap2430_remove(struct platform_device *pdev) 566 { 567 struct omap2430_glue *glue = platform_get_drvdata(pdev); 568 569 cancel_work_sync(&glue->omap_musb_mailbox_work); 570 platform_device_del(glue->musb); 571 platform_device_put(glue->musb); 572 573 return 0; 574 } 575 576 #ifdef CONFIG_PM 577 578 static int omap2430_runtime_suspend(struct device *dev) 579 { 580 struct omap2430_glue *glue = dev_get_drvdata(dev); 581 struct musb *musb = glue_to_musb(glue); 582 583 if (musb) { 584 musb->context.otg_interfsel = musb_readl(musb->mregs, 585 OTG_INTERFSEL); 586 587 omap2430_low_level_exit(musb); 588 usb_phy_set_suspend(musb->xceiv, 1); 589 } 590 591 return 0; 592 } 593 594 static int omap2430_runtime_resume(struct device *dev) 595 { 596 struct omap2430_glue *glue = dev_get_drvdata(dev); 597 struct musb *musb = glue_to_musb(glue); 598 599 if (musb) { 600 omap2430_low_level_init(musb); 601 musb_writel(musb->mregs, OTG_INTERFSEL, 602 musb->context.otg_interfsel); 603 604 usb_phy_set_suspend(musb->xceiv, 0); 605 } 606 607 return 0; 608 } 609 610 static struct dev_pm_ops omap2430_pm_ops = { 611 .runtime_suspend = omap2430_runtime_suspend, 612 .runtime_resume = omap2430_runtime_resume, 613 }; 614 615 #define DEV_PM_OPS (&omap2430_pm_ops) 616 #else 617 #define DEV_PM_OPS NULL 618 #endif 619 620 static struct platform_driver omap2430_driver = { 621 .probe = omap2430_probe, 622 .remove = __devexit_p(omap2430_remove), 623 .driver = { 624 .name = "musb-omap2430", 625 .pm = DEV_PM_OPS, 626 }, 627 }; 628 629 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer"); 630 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 631 MODULE_LICENSE("GPL v2"); 632 633 static int __init omap2430_init(void) 634 { 635 return platform_driver_register(&omap2430_driver); 636 } 637 subsys_initcall(omap2430_init); 638 639 static void __exit omap2430_exit(void) 640 { 641 platform_driver_unregister(&omap2430_driver); 642 } 643 module_exit(omap2430_exit); 644 #endif 645