1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * core.c - ChipIdea USB IP core family device controller 4 * 5 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. 6 * Copyright (C) 2020 NXP 7 * 8 * Author: David Lopo 9 * Peter Chen <peter.chen@nxp.com> 10 * 11 * Main Features: 12 * - Four transfers are supported, usbtest is passed 13 * - USB Certification for gadget: CH9 and Mass Storage are passed 14 * - Low power mode 15 * - USB wakeup 16 */ 17 #include <linux/delay.h> 18 #include <linux/device.h> 19 #include <linux/dma-mapping.h> 20 #include <linux/extcon.h> 21 #include <linux/phy/phy.h> 22 #include <linux/platform_device.h> 23 #include <linux/module.h> 24 #include <linux/idr.h> 25 #include <linux/interrupt.h> 26 #include <linux/io.h> 27 #include <linux/kernel.h> 28 #include <linux/slab.h> 29 #include <linux/pm_runtime.h> 30 #include <linux/pinctrl/consumer.h> 31 #include <linux/usb/ch9.h> 32 #include <linux/usb/gadget.h> 33 #include <linux/usb/otg.h> 34 #include <linux/usb/chipidea.h> 35 #include <linux/usb/of.h> 36 #include <linux/of.h> 37 #include <linux/regulator/consumer.h> 38 #include <linux/usb/ehci_def.h> 39 40 #include "ci.h" 41 #include "udc.h" 42 #include "bits.h" 43 #include "host.h" 44 #include "otg.h" 45 #include "otg_fsm.h" 46 47 /* Controller register map */ 48 static const u8 ci_regs_nolpm[] = { 49 [CAP_CAPLENGTH] = 0x00U, 50 [CAP_HCCPARAMS] = 0x08U, 51 [CAP_DCCPARAMS] = 0x24U, 52 [CAP_TESTMODE] = 0x38U, 53 [OP_USBCMD] = 0x00U, 54 [OP_USBSTS] = 0x04U, 55 [OP_USBINTR] = 0x08U, 56 [OP_DEVICEADDR] = 0x14U, 57 [OP_ENDPTLISTADDR] = 0x18U, 58 [OP_TTCTRL] = 0x1CU, 59 [OP_BURSTSIZE] = 0x20U, 60 [OP_ULPI_VIEWPORT] = 0x30U, 61 [OP_PORTSC] = 0x44U, 62 [OP_DEVLC] = 0x84U, 63 [OP_OTGSC] = 0x64U, 64 [OP_USBMODE] = 0x68U, 65 [OP_ENDPTSETUPSTAT] = 0x6CU, 66 [OP_ENDPTPRIME] = 0x70U, 67 [OP_ENDPTFLUSH] = 0x74U, 68 [OP_ENDPTSTAT] = 0x78U, 69 [OP_ENDPTCOMPLETE] = 0x7CU, 70 [OP_ENDPTCTRL] = 0x80U, 71 }; 72 73 static const u8 ci_regs_lpm[] = { 74 [CAP_CAPLENGTH] = 0x00U, 75 [CAP_HCCPARAMS] = 0x08U, 76 [CAP_DCCPARAMS] = 0x24U, 77 [CAP_TESTMODE] = 0xFCU, 78 [OP_USBCMD] = 0x00U, 79 [OP_USBSTS] = 0x04U, 80 [OP_USBINTR] = 0x08U, 81 [OP_DEVICEADDR] = 0x14U, 82 [OP_ENDPTLISTADDR] = 0x18U, 83 [OP_TTCTRL] = 0x1CU, 84 [OP_BURSTSIZE] = 0x20U, 85 [OP_ULPI_VIEWPORT] = 0x30U, 86 [OP_PORTSC] = 0x44U, 87 [OP_DEVLC] = 0x84U, 88 [OP_OTGSC] = 0xC4U, 89 [OP_USBMODE] = 0xC8U, 90 [OP_ENDPTSETUPSTAT] = 0xD8U, 91 [OP_ENDPTPRIME] = 0xDCU, 92 [OP_ENDPTFLUSH] = 0xE0U, 93 [OP_ENDPTSTAT] = 0xE4U, 94 [OP_ENDPTCOMPLETE] = 0xE8U, 95 [OP_ENDPTCTRL] = 0xECU, 96 }; 97 98 static void hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm) 99 { 100 int i; 101 102 for (i = 0; i < OP_ENDPTCTRL; i++) 103 ci->hw_bank.regmap[i] = 104 (i <= CAP_LAST ? ci->hw_bank.cap : ci->hw_bank.op) + 105 (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]); 106 107 for (; i <= OP_LAST; i++) 108 ci->hw_bank.regmap[i] = ci->hw_bank.op + 109 4 * (i - OP_ENDPTCTRL) + 110 (is_lpm 111 ? ci_regs_lpm[OP_ENDPTCTRL] 112 : ci_regs_nolpm[OP_ENDPTCTRL]); 113 114 } 115 116 static enum ci_revision ci_get_revision(struct ci_hdrc *ci) 117 { 118 int ver = hw_read_id_reg(ci, ID_ID, VERSION) >> __ffs(VERSION); 119 enum ci_revision rev = CI_REVISION_UNKNOWN; 120 121 if (ver == 0x2) { 122 rev = hw_read_id_reg(ci, ID_ID, REVISION) 123 >> __ffs(REVISION); 124 rev += CI_REVISION_20; 125 } else if (ver == 0x0) { 126 rev = CI_REVISION_1X; 127 } 128 129 return rev; 130 } 131 132 /** 133 * hw_read_intr_enable: returns interrupt enable register 134 * 135 * @ci: the controller 136 * 137 * This function returns register data 138 */ 139 u32 hw_read_intr_enable(struct ci_hdrc *ci) 140 { 141 return hw_read(ci, OP_USBINTR, ~0); 142 } 143 144 /** 145 * hw_read_intr_status: returns interrupt status register 146 * 147 * @ci: the controller 148 * 149 * This function returns register data 150 */ 151 u32 hw_read_intr_status(struct ci_hdrc *ci) 152 { 153 return hw_read(ci, OP_USBSTS, ~0); 154 } 155 156 /** 157 * hw_port_test_set: writes port test mode (execute without interruption) 158 * @ci: the controller 159 * @mode: new value 160 * 161 * This function returns an error code 162 */ 163 int hw_port_test_set(struct ci_hdrc *ci, u8 mode) 164 { 165 const u8 TEST_MODE_MAX = 7; 166 167 if (mode > TEST_MODE_MAX) 168 return -EINVAL; 169 170 hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << __ffs(PORTSC_PTC)); 171 return 0; 172 } 173 174 /** 175 * hw_port_test_get: reads port test mode value 176 * 177 * @ci: the controller 178 * 179 * This function returns port test mode value 180 */ 181 u8 hw_port_test_get(struct ci_hdrc *ci) 182 { 183 return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> __ffs(PORTSC_PTC); 184 } 185 186 static void hw_wait_phy_stable(void) 187 { 188 /* 189 * The phy needs some delay to output the stable status from low 190 * power mode. And for OTGSC, the status inputs are debounced 191 * using a 1 ms time constant, so, delay 2ms for controller to get 192 * the stable status, like vbus and id when the phy leaves low power. 193 */ 194 usleep_range(2000, 2500); 195 } 196 197 /* The PHY enters/leaves low power mode */ 198 static void ci_hdrc_enter_lpm_common(struct ci_hdrc *ci, bool enable) 199 { 200 enum ci_hw_regs reg = ci->hw_bank.lpm ? OP_DEVLC : OP_PORTSC; 201 bool lpm = !!(hw_read(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm))); 202 203 if (enable && !lpm) 204 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm), 205 PORTSC_PHCD(ci->hw_bank.lpm)); 206 else if (!enable && lpm) 207 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm), 208 0); 209 } 210 211 static void ci_hdrc_enter_lpm(struct ci_hdrc *ci, bool enable) 212 { 213 return ci->platdata->enter_lpm(ci, enable); 214 } 215 216 static int hw_device_init(struct ci_hdrc *ci, void __iomem *base) 217 { 218 u32 reg; 219 220 /* bank is a module variable */ 221 ci->hw_bank.abs = base; 222 223 ci->hw_bank.cap = ci->hw_bank.abs; 224 ci->hw_bank.cap += ci->platdata->capoffset; 225 ci->hw_bank.op = ci->hw_bank.cap + (ioread32(ci->hw_bank.cap) & 0xff); 226 227 hw_alloc_regmap(ci, false); 228 reg = hw_read(ci, CAP_HCCPARAMS, HCCPARAMS_LEN) >> 229 __ffs(HCCPARAMS_LEN); 230 ci->hw_bank.lpm = reg; 231 if (reg) 232 hw_alloc_regmap(ci, !!reg); 233 ci->hw_bank.size = ci->hw_bank.op - ci->hw_bank.abs; 234 ci->hw_bank.size += OP_LAST; 235 ci->hw_bank.size /= sizeof(u32); 236 237 reg = hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DEN) >> 238 __ffs(DCCPARAMS_DEN); 239 ci->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */ 240 241 if (ci->hw_ep_max > ENDPT_MAX) 242 return -ENODEV; 243 244 ci_hdrc_enter_lpm(ci, false); 245 246 /* Disable all interrupts bits */ 247 hw_write(ci, OP_USBINTR, 0xffffffff, 0); 248 249 /* Clear all interrupts status bits*/ 250 hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff); 251 252 ci->rev = ci_get_revision(ci); 253 254 dev_dbg(ci->dev, 255 "revision: %d, lpm: %d; cap: %px op: %px\n", 256 ci->rev, ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op); 257 258 /* setup lock mode ? */ 259 260 /* ENDPTSETUPSTAT is '0' by default */ 261 262 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */ 263 264 return 0; 265 } 266 267 void hw_phymode_configure(struct ci_hdrc *ci) 268 { 269 u32 portsc, lpm, sts = 0; 270 271 switch (ci->platdata->phy_mode) { 272 case USBPHY_INTERFACE_MODE_UTMI: 273 portsc = PORTSC_PTS(PTS_UTMI); 274 lpm = DEVLC_PTS(PTS_UTMI); 275 break; 276 case USBPHY_INTERFACE_MODE_UTMIW: 277 portsc = PORTSC_PTS(PTS_UTMI) | PORTSC_PTW; 278 lpm = DEVLC_PTS(PTS_UTMI) | DEVLC_PTW; 279 break; 280 case USBPHY_INTERFACE_MODE_ULPI: 281 portsc = PORTSC_PTS(PTS_ULPI); 282 lpm = DEVLC_PTS(PTS_ULPI); 283 break; 284 case USBPHY_INTERFACE_MODE_SERIAL: 285 portsc = PORTSC_PTS(PTS_SERIAL); 286 lpm = DEVLC_PTS(PTS_SERIAL); 287 sts = 1; 288 break; 289 case USBPHY_INTERFACE_MODE_HSIC: 290 portsc = PORTSC_PTS(PTS_HSIC); 291 lpm = DEVLC_PTS(PTS_HSIC); 292 break; 293 default: 294 return; 295 } 296 297 if (ci->hw_bank.lpm) { 298 hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm); 299 if (sts) 300 hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS); 301 } else { 302 hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc); 303 if (sts) 304 hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS); 305 } 306 } 307 EXPORT_SYMBOL_GPL(hw_phymode_configure); 308 309 /** 310 * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy 311 * interfaces 312 * @ci: the controller 313 * 314 * This function returns an error code if the phy failed to init 315 */ 316 static int _ci_usb_phy_init(struct ci_hdrc *ci) 317 { 318 int ret; 319 320 if (ci->phy) { 321 ret = phy_init(ci->phy); 322 if (ret) 323 return ret; 324 325 ret = phy_power_on(ci->phy); 326 if (ret) { 327 phy_exit(ci->phy); 328 return ret; 329 } 330 } else { 331 ret = usb_phy_init(ci->usb_phy); 332 } 333 334 return ret; 335 } 336 337 /** 338 * _ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy 339 * interfaces 340 * @ci: the controller 341 */ 342 static void ci_usb_phy_exit(struct ci_hdrc *ci) 343 { 344 if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL) 345 return; 346 347 if (ci->phy) { 348 phy_power_off(ci->phy); 349 phy_exit(ci->phy); 350 } else { 351 usb_phy_shutdown(ci->usb_phy); 352 } 353 } 354 355 /** 356 * ci_usb_phy_init: initialize phy according to different phy type 357 * @ci: the controller 358 * 359 * This function returns an error code if usb_phy_init has failed 360 */ 361 static int ci_usb_phy_init(struct ci_hdrc *ci) 362 { 363 int ret; 364 365 if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL) 366 return 0; 367 368 switch (ci->platdata->phy_mode) { 369 case USBPHY_INTERFACE_MODE_UTMI: 370 case USBPHY_INTERFACE_MODE_UTMIW: 371 case USBPHY_INTERFACE_MODE_HSIC: 372 ret = _ci_usb_phy_init(ci); 373 if (!ret) 374 hw_wait_phy_stable(); 375 else 376 return ret; 377 hw_phymode_configure(ci); 378 break; 379 case USBPHY_INTERFACE_MODE_ULPI: 380 case USBPHY_INTERFACE_MODE_SERIAL: 381 hw_phymode_configure(ci); 382 ret = _ci_usb_phy_init(ci); 383 if (ret) 384 return ret; 385 break; 386 default: 387 ret = _ci_usb_phy_init(ci); 388 if (!ret) 389 hw_wait_phy_stable(); 390 } 391 392 return ret; 393 } 394 395 396 /** 397 * ci_platform_configure: do controller configure 398 * @ci: the controller 399 * 400 */ 401 void ci_platform_configure(struct ci_hdrc *ci) 402 { 403 bool is_device_mode, is_host_mode; 404 405 is_device_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_DC; 406 is_host_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_HC; 407 408 if (is_device_mode) { 409 phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE); 410 411 if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING) 412 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, 413 USBMODE_CI_SDIS); 414 } 415 416 if (is_host_mode) { 417 phy_set_mode(ci->phy, PHY_MODE_USB_HOST); 418 419 if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING) 420 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, 421 USBMODE_CI_SDIS); 422 } 423 424 if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) { 425 if (ci->hw_bank.lpm) 426 hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC); 427 else 428 hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC); 429 } 430 431 if (ci->platdata->flags & CI_HDRC_SET_NON_ZERO_TTHA) 432 hw_write(ci, OP_TTCTRL, TTCTRL_TTHA_MASK, TTCTRL_TTHA); 433 434 hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16); 435 436 if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST) 437 hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK, 438 ci->platdata->ahb_burst_config); 439 440 /* override burst size, take effect only when ahb_burst_config is 0 */ 441 if (!hw_read_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK)) { 442 if (ci->platdata->flags & CI_HDRC_OVERRIDE_TX_BURST) 443 hw_write(ci, OP_BURSTSIZE, TX_BURST_MASK, 444 ci->platdata->tx_burst_size << __ffs(TX_BURST_MASK)); 445 446 if (ci->platdata->flags & CI_HDRC_OVERRIDE_RX_BURST) 447 hw_write(ci, OP_BURSTSIZE, RX_BURST_MASK, 448 ci->platdata->rx_burst_size); 449 } 450 } 451 452 /** 453 * hw_controller_reset: do controller reset 454 * @ci: the controller 455 * 456 * This function returns an error code 457 */ 458 static int hw_controller_reset(struct ci_hdrc *ci) 459 { 460 int count = 0; 461 462 hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST); 463 while (hw_read(ci, OP_USBCMD, USBCMD_RST)) { 464 udelay(10); 465 if (count++ > 1000) 466 return -ETIMEDOUT; 467 } 468 469 return 0; 470 } 471 472 /** 473 * hw_device_reset: resets chip (execute without interruption) 474 * @ci: the controller 475 * 476 * This function returns an error code 477 */ 478 int hw_device_reset(struct ci_hdrc *ci) 479 { 480 int ret; 481 482 /* should flush & stop before reset */ 483 hw_write(ci, OP_ENDPTFLUSH, ~0, ~0); 484 hw_write(ci, OP_USBCMD, USBCMD_RS, 0); 485 486 ret = hw_controller_reset(ci); 487 if (ret) { 488 dev_err(ci->dev, "error resetting controller, ret=%d\n", ret); 489 return ret; 490 } 491 492 if (ci->platdata->notify_event) { 493 ret = ci->platdata->notify_event(ci, 494 CI_HDRC_CONTROLLER_RESET_EVENT); 495 if (ret) 496 return ret; 497 } 498 499 /* USBMODE should be configured step by step */ 500 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE); 501 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DC); 502 /* HW >= 2.3 */ 503 hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); 504 505 if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DC) { 506 dev_err(ci->dev, "cannot enter in %s device mode\n", 507 ci_role(ci)->name); 508 dev_err(ci->dev, "lpm = %i\n", ci->hw_bank.lpm); 509 return -ENODEV; 510 } 511 512 ci_platform_configure(ci); 513 514 return 0; 515 } 516 517 static irqreturn_t ci_irq(int irq, void *data) 518 { 519 struct ci_hdrc *ci = data; 520 irqreturn_t ret = IRQ_NONE; 521 u32 otgsc = 0; 522 523 if (ci->in_lpm) { 524 disable_irq_nosync(irq); 525 ci->wakeup_int = true; 526 pm_runtime_get(ci->dev); 527 return IRQ_HANDLED; 528 } 529 530 if (ci->is_otg) { 531 otgsc = hw_read_otgsc(ci, ~0); 532 if (ci_otg_is_fsm_mode(ci)) { 533 ret = ci_otg_fsm_irq(ci); 534 if (ret == IRQ_HANDLED) 535 return ret; 536 } 537 } 538 539 /* 540 * Handle id change interrupt, it indicates device/host function 541 * switch. 542 */ 543 if (ci->is_otg && (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) { 544 ci->id_event = true; 545 /* Clear ID change irq status */ 546 hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS); 547 ci_otg_queue_work(ci); 548 return IRQ_HANDLED; 549 } 550 551 /* 552 * Handle vbus change interrupt, it indicates device connection 553 * and disconnection events. 554 */ 555 if (ci->is_otg && (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) { 556 ci->b_sess_valid_event = true; 557 /* Clear BSV irq */ 558 hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS); 559 ci_otg_queue_work(ci); 560 return IRQ_HANDLED; 561 } 562 563 /* Handle device/host interrupt */ 564 if (ci->role != CI_ROLE_END) 565 ret = ci_role(ci)->irq(ci); 566 567 return ret; 568 } 569 570 static int ci_cable_notifier(struct notifier_block *nb, unsigned long event, 571 void *ptr) 572 { 573 struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb); 574 struct ci_hdrc *ci = cbl->ci; 575 576 cbl->connected = event; 577 cbl->changed = true; 578 579 ci_irq(ci->irq, ci); 580 return NOTIFY_DONE; 581 } 582 583 static enum usb_role ci_usb_role_switch_get(struct usb_role_switch *sw) 584 { 585 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw); 586 enum usb_role role; 587 unsigned long flags; 588 589 spin_lock_irqsave(&ci->lock, flags); 590 role = ci_role_to_usb_role(ci); 591 spin_unlock_irqrestore(&ci->lock, flags); 592 593 return role; 594 } 595 596 static int ci_usb_role_switch_set(struct usb_role_switch *sw, 597 enum usb_role role) 598 { 599 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw); 600 struct ci_hdrc_cable *cable = NULL; 601 enum usb_role current_role = ci_role_to_usb_role(ci); 602 enum ci_role ci_role = usb_role_to_ci_role(role); 603 unsigned long flags; 604 605 if ((ci_role != CI_ROLE_END && !ci->roles[ci_role]) || 606 (current_role == role)) 607 return 0; 608 609 pm_runtime_get_sync(ci->dev); 610 /* Stop current role */ 611 spin_lock_irqsave(&ci->lock, flags); 612 if (current_role == USB_ROLE_DEVICE) 613 cable = &ci->platdata->vbus_extcon; 614 else if (current_role == USB_ROLE_HOST) 615 cable = &ci->platdata->id_extcon; 616 617 if (cable) { 618 cable->changed = true; 619 cable->connected = false; 620 ci_irq(ci->irq, ci); 621 spin_unlock_irqrestore(&ci->lock, flags); 622 if (ci->wq && role != USB_ROLE_NONE) 623 flush_workqueue(ci->wq); 624 spin_lock_irqsave(&ci->lock, flags); 625 } 626 627 cable = NULL; 628 629 /* Start target role */ 630 if (role == USB_ROLE_DEVICE) 631 cable = &ci->platdata->vbus_extcon; 632 else if (role == USB_ROLE_HOST) 633 cable = &ci->platdata->id_extcon; 634 635 if (cable) { 636 cable->changed = true; 637 cable->connected = true; 638 ci_irq(ci->irq, ci); 639 } 640 spin_unlock_irqrestore(&ci->lock, flags); 641 pm_runtime_put_sync(ci->dev); 642 643 return 0; 644 } 645 646 static struct usb_role_switch_desc ci_role_switch = { 647 .set = ci_usb_role_switch_set, 648 .get = ci_usb_role_switch_get, 649 .allow_userspace_control = true, 650 }; 651 652 static int ci_get_platdata(struct device *dev, 653 struct ci_hdrc_platform_data *platdata) 654 { 655 struct extcon_dev *ext_vbus, *ext_id; 656 struct ci_hdrc_cable *cable; 657 int ret; 658 659 if (!platdata->phy_mode) 660 platdata->phy_mode = of_usb_get_phy_mode(dev->of_node); 661 662 if (!platdata->dr_mode) 663 platdata->dr_mode = usb_get_dr_mode(dev); 664 665 if (platdata->dr_mode == USB_DR_MODE_UNKNOWN) 666 platdata->dr_mode = USB_DR_MODE_OTG; 667 668 if (platdata->dr_mode != USB_DR_MODE_PERIPHERAL) { 669 /* Get the vbus regulator */ 670 platdata->reg_vbus = devm_regulator_get_optional(dev, "vbus"); 671 if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) { 672 return -EPROBE_DEFER; 673 } else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) { 674 /* no vbus regulator is needed */ 675 platdata->reg_vbus = NULL; 676 } else if (IS_ERR(platdata->reg_vbus)) { 677 dev_err(dev, "Getting regulator error: %ld\n", 678 PTR_ERR(platdata->reg_vbus)); 679 return PTR_ERR(platdata->reg_vbus); 680 } 681 /* Get TPL support */ 682 if (!platdata->tpl_support) 683 platdata->tpl_support = 684 of_usb_host_tpl_support(dev->of_node); 685 } 686 687 if (platdata->dr_mode == USB_DR_MODE_OTG) { 688 /* We can support HNP and SRP of OTG 2.0 */ 689 platdata->ci_otg_caps.otg_rev = 0x0200; 690 platdata->ci_otg_caps.hnp_support = true; 691 platdata->ci_otg_caps.srp_support = true; 692 693 /* Update otg capabilities by DT properties */ 694 ret = of_usb_update_otg_caps(dev->of_node, 695 &platdata->ci_otg_caps); 696 if (ret) 697 return ret; 698 } 699 700 if (usb_get_maximum_speed(dev) == USB_SPEED_FULL) 701 platdata->flags |= CI_HDRC_FORCE_FULLSPEED; 702 703 of_property_read_u32(dev->of_node, "phy-clkgate-delay-us", 704 &platdata->phy_clkgate_delay_us); 705 706 platdata->itc_setting = 1; 707 708 of_property_read_u32(dev->of_node, "itc-setting", 709 &platdata->itc_setting); 710 711 ret = of_property_read_u32(dev->of_node, "ahb-burst-config", 712 &platdata->ahb_burst_config); 713 if (!ret) { 714 platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST; 715 } else if (ret != -EINVAL) { 716 dev_err(dev, "failed to get ahb-burst-config\n"); 717 return ret; 718 } 719 720 ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword", 721 &platdata->tx_burst_size); 722 if (!ret) { 723 platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST; 724 } else if (ret != -EINVAL) { 725 dev_err(dev, "failed to get tx-burst-size-dword\n"); 726 return ret; 727 } 728 729 ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword", 730 &platdata->rx_burst_size); 731 if (!ret) { 732 platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST; 733 } else if (ret != -EINVAL) { 734 dev_err(dev, "failed to get rx-burst-size-dword\n"); 735 return ret; 736 } 737 738 if (of_find_property(dev->of_node, "non-zero-ttctrl-ttha", NULL)) 739 platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA; 740 741 ext_id = ERR_PTR(-ENODEV); 742 ext_vbus = ERR_PTR(-ENODEV); 743 if (of_property_read_bool(dev->of_node, "extcon")) { 744 /* Each one of them is not mandatory */ 745 ext_vbus = extcon_get_edev_by_phandle(dev, 0); 746 if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV) 747 return PTR_ERR(ext_vbus); 748 749 ext_id = extcon_get_edev_by_phandle(dev, 1); 750 if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV) 751 return PTR_ERR(ext_id); 752 } 753 754 cable = &platdata->vbus_extcon; 755 cable->nb.notifier_call = ci_cable_notifier; 756 cable->edev = ext_vbus; 757 758 if (!IS_ERR(ext_vbus)) { 759 ret = extcon_get_state(cable->edev, EXTCON_USB); 760 if (ret) 761 cable->connected = true; 762 else 763 cable->connected = false; 764 } 765 766 cable = &platdata->id_extcon; 767 cable->nb.notifier_call = ci_cable_notifier; 768 cable->edev = ext_id; 769 770 if (!IS_ERR(ext_id)) { 771 ret = extcon_get_state(cable->edev, EXTCON_USB_HOST); 772 if (ret) 773 cable->connected = true; 774 else 775 cable->connected = false; 776 } 777 778 if (device_property_read_bool(dev, "usb-role-switch")) 779 ci_role_switch.fwnode = dev->fwnode; 780 781 platdata->pctl = devm_pinctrl_get(dev); 782 if (!IS_ERR(platdata->pctl)) { 783 struct pinctrl_state *p; 784 785 p = pinctrl_lookup_state(platdata->pctl, "default"); 786 if (!IS_ERR(p)) 787 platdata->pins_default = p; 788 789 p = pinctrl_lookup_state(platdata->pctl, "host"); 790 if (!IS_ERR(p)) 791 platdata->pins_host = p; 792 793 p = pinctrl_lookup_state(platdata->pctl, "device"); 794 if (!IS_ERR(p)) 795 platdata->pins_device = p; 796 } 797 798 if (!platdata->enter_lpm) 799 platdata->enter_lpm = ci_hdrc_enter_lpm_common; 800 801 return 0; 802 } 803 804 static int ci_extcon_register(struct ci_hdrc *ci) 805 { 806 struct ci_hdrc_cable *id, *vbus; 807 int ret; 808 809 id = &ci->platdata->id_extcon; 810 id->ci = ci; 811 if (!IS_ERR_OR_NULL(id->edev)) { 812 ret = devm_extcon_register_notifier(ci->dev, id->edev, 813 EXTCON_USB_HOST, &id->nb); 814 if (ret < 0) { 815 dev_err(ci->dev, "register ID failed\n"); 816 return ret; 817 } 818 } 819 820 vbus = &ci->platdata->vbus_extcon; 821 vbus->ci = ci; 822 if (!IS_ERR_OR_NULL(vbus->edev)) { 823 ret = devm_extcon_register_notifier(ci->dev, vbus->edev, 824 EXTCON_USB, &vbus->nb); 825 if (ret < 0) { 826 dev_err(ci->dev, "register VBUS failed\n"); 827 return ret; 828 } 829 } 830 831 return 0; 832 } 833 834 static DEFINE_IDA(ci_ida); 835 836 struct platform_device *ci_hdrc_add_device(struct device *dev, 837 struct resource *res, int nres, 838 struct ci_hdrc_platform_data *platdata) 839 { 840 struct platform_device *pdev; 841 int id, ret; 842 843 ret = ci_get_platdata(dev, platdata); 844 if (ret) 845 return ERR_PTR(ret); 846 847 id = ida_simple_get(&ci_ida, 0, 0, GFP_KERNEL); 848 if (id < 0) 849 return ERR_PTR(id); 850 851 pdev = platform_device_alloc("ci_hdrc", id); 852 if (!pdev) { 853 ret = -ENOMEM; 854 goto put_id; 855 } 856 857 pdev->dev.parent = dev; 858 859 ret = platform_device_add_resources(pdev, res, nres); 860 if (ret) 861 goto err; 862 863 ret = platform_device_add_data(pdev, platdata, sizeof(*platdata)); 864 if (ret) 865 goto err; 866 867 ret = platform_device_add(pdev); 868 if (ret) 869 goto err; 870 871 return pdev; 872 873 err: 874 platform_device_put(pdev); 875 put_id: 876 ida_simple_remove(&ci_ida, id); 877 return ERR_PTR(ret); 878 } 879 EXPORT_SYMBOL_GPL(ci_hdrc_add_device); 880 881 void ci_hdrc_remove_device(struct platform_device *pdev) 882 { 883 int id = pdev->id; 884 platform_device_unregister(pdev); 885 ida_simple_remove(&ci_ida, id); 886 } 887 EXPORT_SYMBOL_GPL(ci_hdrc_remove_device); 888 889 /** 890 * ci_hdrc_query_available_role: get runtime available operation mode 891 * 892 * The glue layer can get current operation mode (host/peripheral/otg) 893 * This function should be called after ci core device has created. 894 * 895 * @pdev: the platform device of ci core. 896 * 897 * Return runtime usb_dr_mode. 898 */ 899 enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev) 900 { 901 struct ci_hdrc *ci = platform_get_drvdata(pdev); 902 903 if (!ci) 904 return USB_DR_MODE_UNKNOWN; 905 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) 906 return USB_DR_MODE_OTG; 907 else if (ci->roles[CI_ROLE_HOST]) 908 return USB_DR_MODE_HOST; 909 else if (ci->roles[CI_ROLE_GADGET]) 910 return USB_DR_MODE_PERIPHERAL; 911 else 912 return USB_DR_MODE_UNKNOWN; 913 } 914 EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role); 915 916 static inline void ci_role_destroy(struct ci_hdrc *ci) 917 { 918 ci_hdrc_gadget_destroy(ci); 919 ci_hdrc_host_destroy(ci); 920 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) 921 ci_hdrc_otg_destroy(ci); 922 } 923 924 static void ci_get_otg_capable(struct ci_hdrc *ci) 925 { 926 if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG) 927 ci->is_otg = false; 928 else 929 ci->is_otg = (hw_read(ci, CAP_DCCPARAMS, 930 DCCPARAMS_DC | DCCPARAMS_HC) 931 == (DCCPARAMS_DC | DCCPARAMS_HC)); 932 if (ci->is_otg) { 933 dev_dbg(ci->dev, "It is OTG capable controller\n"); 934 /* Disable and clear all OTG irq */ 935 hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS, 936 OTGSC_INT_STATUS_BITS); 937 } 938 } 939 940 static ssize_t role_show(struct device *dev, struct device_attribute *attr, 941 char *buf) 942 { 943 struct ci_hdrc *ci = dev_get_drvdata(dev); 944 945 if (ci->role != CI_ROLE_END) 946 return sprintf(buf, "%s\n", ci_role(ci)->name); 947 948 return 0; 949 } 950 951 static ssize_t role_store(struct device *dev, 952 struct device_attribute *attr, const char *buf, size_t n) 953 { 954 struct ci_hdrc *ci = dev_get_drvdata(dev); 955 enum ci_role role; 956 int ret; 957 958 if (!(ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])) { 959 dev_warn(dev, "Current configuration is not dual-role, quit\n"); 960 return -EPERM; 961 } 962 963 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) 964 if (!strncmp(buf, ci->roles[role]->name, 965 strlen(ci->roles[role]->name))) 966 break; 967 968 if (role == CI_ROLE_END || role == ci->role) 969 return -EINVAL; 970 971 pm_runtime_get_sync(dev); 972 disable_irq(ci->irq); 973 ci_role_stop(ci); 974 ret = ci_role_start(ci, role); 975 if (!ret && ci->role == CI_ROLE_GADGET) 976 ci_handle_vbus_change(ci); 977 enable_irq(ci->irq); 978 pm_runtime_put_sync(dev); 979 980 return (ret == 0) ? n : ret; 981 } 982 static DEVICE_ATTR_RW(role); 983 984 static struct attribute *ci_attrs[] = { 985 &dev_attr_role.attr, 986 NULL, 987 }; 988 ATTRIBUTE_GROUPS(ci); 989 990 static int ci_hdrc_probe(struct platform_device *pdev) 991 { 992 struct device *dev = &pdev->dev; 993 struct ci_hdrc *ci; 994 struct resource *res; 995 void __iomem *base; 996 int ret; 997 enum usb_dr_mode dr_mode; 998 999 if (!dev_get_platdata(dev)) { 1000 dev_err(dev, "platform data missing\n"); 1001 return -ENODEV; 1002 } 1003 1004 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1005 base = devm_ioremap_resource(dev, res); 1006 if (IS_ERR(base)) 1007 return PTR_ERR(base); 1008 1009 ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL); 1010 if (!ci) 1011 return -ENOMEM; 1012 1013 spin_lock_init(&ci->lock); 1014 ci->dev = dev; 1015 ci->platdata = dev_get_platdata(dev); 1016 ci->imx28_write_fix = !!(ci->platdata->flags & 1017 CI_HDRC_IMX28_WRITE_FIX); 1018 ci->supports_runtime_pm = !!(ci->platdata->flags & 1019 CI_HDRC_SUPPORTS_RUNTIME_PM); 1020 platform_set_drvdata(pdev, ci); 1021 1022 ret = hw_device_init(ci, base); 1023 if (ret < 0) { 1024 dev_err(dev, "can't initialize hardware\n"); 1025 return -ENODEV; 1026 } 1027 1028 ret = ci_ulpi_init(ci); 1029 if (ret) 1030 return ret; 1031 1032 if (ci->platdata->phy) { 1033 ci->phy = ci->platdata->phy; 1034 } else if (ci->platdata->usb_phy) { 1035 ci->usb_phy = ci->platdata->usb_phy; 1036 } else { 1037 /* Look for a generic PHY first */ 1038 ci->phy = devm_phy_get(dev->parent, "usb-phy"); 1039 1040 if (PTR_ERR(ci->phy) == -EPROBE_DEFER) { 1041 ret = -EPROBE_DEFER; 1042 goto ulpi_exit; 1043 } else if (IS_ERR(ci->phy)) { 1044 ci->phy = NULL; 1045 } 1046 1047 /* Look for a legacy USB PHY from device-tree next */ 1048 if (!ci->phy) { 1049 ci->usb_phy = devm_usb_get_phy_by_phandle(dev->parent, 1050 "phys", 0); 1051 1052 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) { 1053 ret = -EPROBE_DEFER; 1054 goto ulpi_exit; 1055 } else if (IS_ERR(ci->usb_phy)) { 1056 ci->usb_phy = NULL; 1057 } 1058 } 1059 1060 /* Look for any registered legacy USB PHY as last resort */ 1061 if (!ci->phy && !ci->usb_phy) { 1062 ci->usb_phy = devm_usb_get_phy(dev->parent, 1063 USB_PHY_TYPE_USB2); 1064 1065 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) { 1066 ret = -EPROBE_DEFER; 1067 goto ulpi_exit; 1068 } else if (IS_ERR(ci->usb_phy)) { 1069 ci->usb_phy = NULL; 1070 } 1071 } 1072 1073 /* No USB PHY was found in the end */ 1074 if (!ci->phy && !ci->usb_phy) { 1075 ret = -ENXIO; 1076 goto ulpi_exit; 1077 } 1078 } 1079 1080 ret = ci_usb_phy_init(ci); 1081 if (ret) { 1082 dev_err(dev, "unable to init phy: %d\n", ret); 1083 return ret; 1084 } 1085 1086 ci->hw_bank.phys = res->start; 1087 1088 ci->irq = platform_get_irq(pdev, 0); 1089 if (ci->irq < 0) { 1090 ret = ci->irq; 1091 goto deinit_phy; 1092 } 1093 1094 ci_get_otg_capable(ci); 1095 1096 dr_mode = ci->platdata->dr_mode; 1097 /* initialize role(s) before the interrupt is requested */ 1098 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { 1099 ret = ci_hdrc_host_init(ci); 1100 if (ret) { 1101 if (ret == -ENXIO) 1102 dev_info(dev, "doesn't support host\n"); 1103 else 1104 goto deinit_phy; 1105 } 1106 } 1107 1108 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) { 1109 ret = ci_hdrc_gadget_init(ci); 1110 if (ret) { 1111 if (ret == -ENXIO) 1112 dev_info(dev, "doesn't support gadget\n"); 1113 else 1114 goto deinit_host; 1115 } 1116 } 1117 1118 if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) { 1119 dev_err(dev, "no supported roles\n"); 1120 ret = -ENODEV; 1121 goto deinit_gadget; 1122 } 1123 1124 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) { 1125 ret = ci_hdrc_otg_init(ci); 1126 if (ret) { 1127 dev_err(dev, "init otg fails, ret = %d\n", ret); 1128 goto deinit_gadget; 1129 } 1130 } 1131 1132 if (ci_role_switch.fwnode) { 1133 ci_role_switch.driver_data = ci; 1134 ci->role_switch = usb_role_switch_register(dev, 1135 &ci_role_switch); 1136 if (IS_ERR(ci->role_switch)) { 1137 ret = PTR_ERR(ci->role_switch); 1138 goto deinit_otg; 1139 } 1140 } 1141 1142 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) { 1143 if (ci->is_otg) { 1144 ci->role = ci_otg_role(ci); 1145 /* Enable ID change irq */ 1146 hw_write_otgsc(ci, OTGSC_IDIE, OTGSC_IDIE); 1147 } else { 1148 /* 1149 * If the controller is not OTG capable, but support 1150 * role switch, the defalt role is gadget, and the 1151 * user can switch it through debugfs. 1152 */ 1153 ci->role = CI_ROLE_GADGET; 1154 } 1155 } else { 1156 ci->role = ci->roles[CI_ROLE_HOST] 1157 ? CI_ROLE_HOST 1158 : CI_ROLE_GADGET; 1159 } 1160 1161 if (!ci_otg_is_fsm_mode(ci)) { 1162 /* only update vbus status for peripheral */ 1163 if (ci->role == CI_ROLE_GADGET) { 1164 /* Pull down DP for possible charger detection */ 1165 hw_write(ci, OP_USBCMD, USBCMD_RS, 0); 1166 ci_handle_vbus_change(ci); 1167 } 1168 1169 ret = ci_role_start(ci, ci->role); 1170 if (ret) { 1171 dev_err(dev, "can't start %s role\n", 1172 ci_role(ci)->name); 1173 goto stop; 1174 } 1175 } 1176 1177 ret = devm_request_irq(dev, ci->irq, ci_irq, IRQF_SHARED, 1178 ci->platdata->name, ci); 1179 if (ret) 1180 goto stop; 1181 1182 ret = ci_extcon_register(ci); 1183 if (ret) 1184 goto stop; 1185 1186 if (ci->supports_runtime_pm) { 1187 pm_runtime_set_active(&pdev->dev); 1188 pm_runtime_enable(&pdev->dev); 1189 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); 1190 pm_runtime_mark_last_busy(ci->dev); 1191 pm_runtime_use_autosuspend(&pdev->dev); 1192 } 1193 1194 if (ci_otg_is_fsm_mode(ci)) 1195 ci_hdrc_otg_fsm_start(ci); 1196 1197 device_set_wakeup_capable(&pdev->dev, true); 1198 dbg_create_files(ci); 1199 1200 return 0; 1201 1202 stop: 1203 if (ci->role_switch) 1204 usb_role_switch_unregister(ci->role_switch); 1205 deinit_otg: 1206 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) 1207 ci_hdrc_otg_destroy(ci); 1208 deinit_gadget: 1209 ci_hdrc_gadget_destroy(ci); 1210 deinit_host: 1211 ci_hdrc_host_destroy(ci); 1212 deinit_phy: 1213 ci_usb_phy_exit(ci); 1214 ulpi_exit: 1215 ci_ulpi_exit(ci); 1216 1217 return ret; 1218 } 1219 1220 static int ci_hdrc_remove(struct platform_device *pdev) 1221 { 1222 struct ci_hdrc *ci = platform_get_drvdata(pdev); 1223 1224 if (ci->role_switch) 1225 usb_role_switch_unregister(ci->role_switch); 1226 1227 if (ci->supports_runtime_pm) { 1228 pm_runtime_get_sync(&pdev->dev); 1229 pm_runtime_disable(&pdev->dev); 1230 pm_runtime_put_noidle(&pdev->dev); 1231 } 1232 1233 dbg_remove_files(ci); 1234 ci_role_destroy(ci); 1235 ci_hdrc_enter_lpm(ci, true); 1236 ci_usb_phy_exit(ci); 1237 ci_ulpi_exit(ci); 1238 1239 return 0; 1240 } 1241 1242 #ifdef CONFIG_PM 1243 /* Prepare wakeup by SRP before suspend */ 1244 static void ci_otg_fsm_suspend_for_srp(struct ci_hdrc *ci) 1245 { 1246 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) && 1247 !hw_read_otgsc(ci, OTGSC_ID)) { 1248 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP, 1249 PORTSC_PP); 1250 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_WKCN, 1251 PORTSC_WKCN); 1252 } 1253 } 1254 1255 /* Handle SRP when wakeup by data pulse */ 1256 static void ci_otg_fsm_wakeup_by_srp(struct ci_hdrc *ci) 1257 { 1258 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) && 1259 (ci->fsm.a_bus_drop == 1) && (ci->fsm.a_bus_req == 0)) { 1260 if (!hw_read_otgsc(ci, OTGSC_ID)) { 1261 ci->fsm.a_srp_det = 1; 1262 ci->fsm.a_bus_drop = 0; 1263 } else { 1264 ci->fsm.id = 1; 1265 } 1266 ci_otg_queue_work(ci); 1267 } 1268 } 1269 1270 static void ci_controller_suspend(struct ci_hdrc *ci) 1271 { 1272 disable_irq(ci->irq); 1273 ci_hdrc_enter_lpm(ci, true); 1274 if (ci->platdata->phy_clkgate_delay_us) 1275 usleep_range(ci->platdata->phy_clkgate_delay_us, 1276 ci->platdata->phy_clkgate_delay_us + 50); 1277 usb_phy_set_suspend(ci->usb_phy, 1); 1278 ci->in_lpm = true; 1279 enable_irq(ci->irq); 1280 } 1281 1282 /* 1283 * Handle the wakeup interrupt triggered by extcon connector 1284 * We need to call ci_irq again for extcon since the first 1285 * interrupt (wakeup int) only let the controller be out of 1286 * low power mode, but not handle any interrupts. 1287 */ 1288 static void ci_extcon_wakeup_int(struct ci_hdrc *ci) 1289 { 1290 struct ci_hdrc_cable *cable_id, *cable_vbus; 1291 u32 otgsc = hw_read_otgsc(ci, ~0); 1292 1293 cable_id = &ci->platdata->id_extcon; 1294 cable_vbus = &ci->platdata->vbus_extcon; 1295 1296 if (!IS_ERR(cable_id->edev) && ci->is_otg && 1297 (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) 1298 ci_irq(ci->irq, ci); 1299 1300 if (!IS_ERR(cable_vbus->edev) && ci->is_otg && 1301 (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) 1302 ci_irq(ci->irq, ci); 1303 } 1304 1305 static int ci_controller_resume(struct device *dev) 1306 { 1307 struct ci_hdrc *ci = dev_get_drvdata(dev); 1308 int ret; 1309 1310 dev_dbg(dev, "at %s\n", __func__); 1311 1312 if (!ci->in_lpm) { 1313 WARN_ON(1); 1314 return 0; 1315 } 1316 1317 ci_hdrc_enter_lpm(ci, false); 1318 1319 ret = ci_ulpi_resume(ci); 1320 if (ret) 1321 return ret; 1322 1323 if (ci->usb_phy) { 1324 usb_phy_set_suspend(ci->usb_phy, 0); 1325 usb_phy_set_wakeup(ci->usb_phy, false); 1326 hw_wait_phy_stable(); 1327 } 1328 1329 ci->in_lpm = false; 1330 if (ci->wakeup_int) { 1331 ci->wakeup_int = false; 1332 pm_runtime_mark_last_busy(ci->dev); 1333 pm_runtime_put_autosuspend(ci->dev); 1334 enable_irq(ci->irq); 1335 if (ci_otg_is_fsm_mode(ci)) 1336 ci_otg_fsm_wakeup_by_srp(ci); 1337 ci_extcon_wakeup_int(ci); 1338 } 1339 1340 return 0; 1341 } 1342 1343 #ifdef CONFIG_PM_SLEEP 1344 static int ci_suspend(struct device *dev) 1345 { 1346 struct ci_hdrc *ci = dev_get_drvdata(dev); 1347 1348 if (ci->wq) 1349 flush_workqueue(ci->wq); 1350 /* 1351 * Controller needs to be active during suspend, otherwise the core 1352 * may run resume when the parent is at suspend if other driver's 1353 * suspend fails, it occurs before parent's suspend has not started, 1354 * but the core suspend has finished. 1355 */ 1356 if (ci->in_lpm) 1357 pm_runtime_resume(dev); 1358 1359 if (ci->in_lpm) { 1360 WARN_ON(1); 1361 return 0; 1362 } 1363 1364 if (device_may_wakeup(dev)) { 1365 if (ci_otg_is_fsm_mode(ci)) 1366 ci_otg_fsm_suspend_for_srp(ci); 1367 1368 usb_phy_set_wakeup(ci->usb_phy, true); 1369 enable_irq_wake(ci->irq); 1370 } 1371 1372 ci_controller_suspend(ci); 1373 1374 return 0; 1375 } 1376 1377 static int ci_resume(struct device *dev) 1378 { 1379 struct ci_hdrc *ci = dev_get_drvdata(dev); 1380 int ret; 1381 1382 if (device_may_wakeup(dev)) 1383 disable_irq_wake(ci->irq); 1384 1385 ret = ci_controller_resume(dev); 1386 if (ret) 1387 return ret; 1388 1389 if (ci->supports_runtime_pm) { 1390 pm_runtime_disable(dev); 1391 pm_runtime_set_active(dev); 1392 pm_runtime_enable(dev); 1393 } 1394 1395 return ret; 1396 } 1397 #endif /* CONFIG_PM_SLEEP */ 1398 1399 static int ci_runtime_suspend(struct device *dev) 1400 { 1401 struct ci_hdrc *ci = dev_get_drvdata(dev); 1402 1403 dev_dbg(dev, "at %s\n", __func__); 1404 1405 if (ci->in_lpm) { 1406 WARN_ON(1); 1407 return 0; 1408 } 1409 1410 if (ci_otg_is_fsm_mode(ci)) 1411 ci_otg_fsm_suspend_for_srp(ci); 1412 1413 usb_phy_set_wakeup(ci->usb_phy, true); 1414 ci_controller_suspend(ci); 1415 1416 return 0; 1417 } 1418 1419 static int ci_runtime_resume(struct device *dev) 1420 { 1421 return ci_controller_resume(dev); 1422 } 1423 1424 #endif /* CONFIG_PM */ 1425 static const struct dev_pm_ops ci_pm_ops = { 1426 SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume) 1427 SET_RUNTIME_PM_OPS(ci_runtime_suspend, ci_runtime_resume, NULL) 1428 }; 1429 1430 static struct platform_driver ci_hdrc_driver = { 1431 .probe = ci_hdrc_probe, 1432 .remove = ci_hdrc_remove, 1433 .driver = { 1434 .name = "ci_hdrc", 1435 .pm = &ci_pm_ops, 1436 .dev_groups = ci_groups, 1437 }, 1438 }; 1439 1440 static int __init ci_hdrc_platform_register(void) 1441 { 1442 ci_hdrc_host_driver_init(); 1443 return platform_driver_register(&ci_hdrc_driver); 1444 } 1445 module_init(ci_hdrc_platform_register); 1446 1447 static void __exit ci_hdrc_platform_unregister(void) 1448 { 1449 platform_driver_unregister(&ci_hdrc_driver); 1450 } 1451 module_exit(ci_hdrc_platform_unregister); 1452 1453 MODULE_ALIAS("platform:ci_hdrc"); 1454 MODULE_LICENSE("GPL v2"); 1455 MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>"); 1456 MODULE_DESCRIPTION("ChipIdea HDRC Driver"); 1457