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_FRINDEX] = 0x0CU, 57 [OP_DEVICEADDR] = 0x14U, 58 [OP_ENDPTLISTADDR] = 0x18U, 59 [OP_TTCTRL] = 0x1CU, 60 [OP_BURSTSIZE] = 0x20U, 61 [OP_ULPI_VIEWPORT] = 0x30U, 62 [OP_PORTSC] = 0x44U, 63 [OP_DEVLC] = 0x84U, 64 [OP_OTGSC] = 0x64U, 65 [OP_USBMODE] = 0x68U, 66 [OP_ENDPTSETUPSTAT] = 0x6CU, 67 [OP_ENDPTPRIME] = 0x70U, 68 [OP_ENDPTFLUSH] = 0x74U, 69 [OP_ENDPTSTAT] = 0x78U, 70 [OP_ENDPTCOMPLETE] = 0x7CU, 71 [OP_ENDPTCTRL] = 0x80U, 72 }; 73 74 static const u8 ci_regs_lpm[] = { 75 [CAP_CAPLENGTH] = 0x00U, 76 [CAP_HCCPARAMS] = 0x08U, 77 [CAP_DCCPARAMS] = 0x24U, 78 [CAP_TESTMODE] = 0xFCU, 79 [OP_USBCMD] = 0x00U, 80 [OP_USBSTS] = 0x04U, 81 [OP_USBINTR] = 0x08U, 82 [OP_FRINDEX] = 0x0CU, 83 [OP_DEVICEADDR] = 0x14U, 84 [OP_ENDPTLISTADDR] = 0x18U, 85 [OP_TTCTRL] = 0x1CU, 86 [OP_BURSTSIZE] = 0x20U, 87 [OP_ULPI_VIEWPORT] = 0x30U, 88 [OP_PORTSC] = 0x44U, 89 [OP_DEVLC] = 0x84U, 90 [OP_OTGSC] = 0xC4U, 91 [OP_USBMODE] = 0xC8U, 92 [OP_ENDPTSETUPSTAT] = 0xD8U, 93 [OP_ENDPTPRIME] = 0xDCU, 94 [OP_ENDPTFLUSH] = 0xE0U, 95 [OP_ENDPTSTAT] = 0xE4U, 96 [OP_ENDPTCOMPLETE] = 0xE8U, 97 [OP_ENDPTCTRL] = 0xECU, 98 }; 99 100 static void hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm) 101 { 102 int i; 103 104 for (i = 0; i < OP_ENDPTCTRL; i++) 105 ci->hw_bank.regmap[i] = 106 (i <= CAP_LAST ? ci->hw_bank.cap : ci->hw_bank.op) + 107 (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]); 108 109 for (; i <= OP_LAST; i++) 110 ci->hw_bank.regmap[i] = ci->hw_bank.op + 111 4 * (i - OP_ENDPTCTRL) + 112 (is_lpm 113 ? ci_regs_lpm[OP_ENDPTCTRL] 114 : ci_regs_nolpm[OP_ENDPTCTRL]); 115 116 } 117 118 static enum ci_revision ci_get_revision(struct ci_hdrc *ci) 119 { 120 int ver = hw_read_id_reg(ci, ID_ID, VERSION) >> __ffs(VERSION); 121 enum ci_revision rev = CI_REVISION_UNKNOWN; 122 123 if (ver == 0x2) { 124 rev = hw_read_id_reg(ci, ID_ID, REVISION) 125 >> __ffs(REVISION); 126 rev += CI_REVISION_20; 127 } else if (ver == 0x0) { 128 rev = CI_REVISION_1X; 129 } 130 131 return rev; 132 } 133 134 /** 135 * hw_read_intr_enable: returns interrupt enable register 136 * 137 * @ci: the controller 138 * 139 * This function returns register data 140 */ 141 u32 hw_read_intr_enable(struct ci_hdrc *ci) 142 { 143 return hw_read(ci, OP_USBINTR, ~0); 144 } 145 146 /** 147 * hw_read_intr_status: returns interrupt status register 148 * 149 * @ci: the controller 150 * 151 * This function returns register data 152 */ 153 u32 hw_read_intr_status(struct ci_hdrc *ci) 154 { 155 return hw_read(ci, OP_USBSTS, ~0); 156 } 157 158 /** 159 * hw_port_test_set: writes port test mode (execute without interruption) 160 * @ci: the controller 161 * @mode: new value 162 * 163 * This function returns an error code 164 */ 165 int hw_port_test_set(struct ci_hdrc *ci, u8 mode) 166 { 167 const u8 TEST_MODE_MAX = 7; 168 169 if (mode > TEST_MODE_MAX) 170 return -EINVAL; 171 172 hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << __ffs(PORTSC_PTC)); 173 return 0; 174 } 175 176 /** 177 * hw_port_test_get: reads port test mode value 178 * 179 * @ci: the controller 180 * 181 * This function returns port test mode value 182 */ 183 u8 hw_port_test_get(struct ci_hdrc *ci) 184 { 185 return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> __ffs(PORTSC_PTC); 186 } 187 188 static void hw_wait_phy_stable(void) 189 { 190 /* 191 * The phy needs some delay to output the stable status from low 192 * power mode. And for OTGSC, the status inputs are debounced 193 * using a 1 ms time constant, so, delay 2ms for controller to get 194 * the stable status, like vbus and id when the phy leaves low power. 195 */ 196 usleep_range(2000, 2500); 197 } 198 199 /* The PHY enters/leaves low power mode */ 200 static void ci_hdrc_enter_lpm_common(struct ci_hdrc *ci, bool enable) 201 { 202 enum ci_hw_regs reg = ci->hw_bank.lpm ? OP_DEVLC : OP_PORTSC; 203 bool lpm = !!(hw_read(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm))); 204 205 if (enable && !lpm) 206 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm), 207 PORTSC_PHCD(ci->hw_bank.lpm)); 208 else if (!enable && lpm) 209 hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm), 210 0); 211 } 212 213 static void ci_hdrc_enter_lpm(struct ci_hdrc *ci, bool enable) 214 { 215 return ci->platdata->enter_lpm(ci, enable); 216 } 217 218 static int hw_device_init(struct ci_hdrc *ci, void __iomem *base) 219 { 220 u32 reg; 221 222 /* bank is a module variable */ 223 ci->hw_bank.abs = base; 224 225 ci->hw_bank.cap = ci->hw_bank.abs; 226 ci->hw_bank.cap += ci->platdata->capoffset; 227 ci->hw_bank.op = ci->hw_bank.cap + (ioread32(ci->hw_bank.cap) & 0xff); 228 229 hw_alloc_regmap(ci, false); 230 reg = hw_read(ci, CAP_HCCPARAMS, HCCPARAMS_LEN) >> 231 __ffs(HCCPARAMS_LEN); 232 ci->hw_bank.lpm = reg; 233 if (reg) 234 hw_alloc_regmap(ci, !!reg); 235 ci->hw_bank.size = ci->hw_bank.op - ci->hw_bank.abs; 236 ci->hw_bank.size += OP_LAST; 237 ci->hw_bank.size /= sizeof(u32); 238 239 reg = hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DEN) >> 240 __ffs(DCCPARAMS_DEN); 241 ci->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */ 242 243 if (ci->hw_ep_max > ENDPT_MAX) 244 return -ENODEV; 245 246 ci_hdrc_enter_lpm(ci, false); 247 248 /* Disable all interrupts bits */ 249 hw_write(ci, OP_USBINTR, 0xffffffff, 0); 250 251 /* Clear all interrupts status bits*/ 252 hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff); 253 254 ci->rev = ci_get_revision(ci); 255 256 dev_dbg(ci->dev, 257 "revision: %d, lpm: %d; cap: %px op: %px\n", 258 ci->rev, ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op); 259 260 /* setup lock mode ? */ 261 262 /* ENDPTSETUPSTAT is '0' by default */ 263 264 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */ 265 266 return 0; 267 } 268 269 void hw_phymode_configure(struct ci_hdrc *ci) 270 { 271 u32 portsc, lpm, sts = 0; 272 273 switch (ci->platdata->phy_mode) { 274 case USBPHY_INTERFACE_MODE_UTMI: 275 portsc = PORTSC_PTS(PTS_UTMI); 276 lpm = DEVLC_PTS(PTS_UTMI); 277 break; 278 case USBPHY_INTERFACE_MODE_UTMIW: 279 portsc = PORTSC_PTS(PTS_UTMI) | PORTSC_PTW; 280 lpm = DEVLC_PTS(PTS_UTMI) | DEVLC_PTW; 281 break; 282 case USBPHY_INTERFACE_MODE_ULPI: 283 portsc = PORTSC_PTS(PTS_ULPI); 284 lpm = DEVLC_PTS(PTS_ULPI); 285 break; 286 case USBPHY_INTERFACE_MODE_SERIAL: 287 portsc = PORTSC_PTS(PTS_SERIAL); 288 lpm = DEVLC_PTS(PTS_SERIAL); 289 sts = 1; 290 break; 291 case USBPHY_INTERFACE_MODE_HSIC: 292 portsc = PORTSC_PTS(PTS_HSIC); 293 lpm = DEVLC_PTS(PTS_HSIC); 294 break; 295 default: 296 return; 297 } 298 299 if (ci->hw_bank.lpm) { 300 hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm); 301 if (sts) 302 hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS); 303 } else { 304 hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc); 305 if (sts) 306 hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS); 307 } 308 } 309 EXPORT_SYMBOL_GPL(hw_phymode_configure); 310 311 /** 312 * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy 313 * interfaces 314 * @ci: the controller 315 * 316 * This function returns an error code if the phy failed to init 317 */ 318 static int _ci_usb_phy_init(struct ci_hdrc *ci) 319 { 320 int ret; 321 322 if (ci->phy) { 323 ret = phy_init(ci->phy); 324 if (ret) 325 return ret; 326 327 ret = phy_power_on(ci->phy); 328 if (ret) { 329 phy_exit(ci->phy); 330 return ret; 331 } 332 } else { 333 ret = usb_phy_init(ci->usb_phy); 334 } 335 336 return ret; 337 } 338 339 /** 340 * ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy 341 * interfaces 342 * @ci: the controller 343 */ 344 static void ci_usb_phy_exit(struct ci_hdrc *ci) 345 { 346 if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL) 347 return; 348 349 if (ci->phy) { 350 phy_power_off(ci->phy); 351 phy_exit(ci->phy); 352 } else { 353 usb_phy_shutdown(ci->usb_phy); 354 } 355 } 356 357 /** 358 * ci_usb_phy_init: initialize phy according to different phy type 359 * @ci: the controller 360 * 361 * This function returns an error code if usb_phy_init has failed 362 */ 363 static int ci_usb_phy_init(struct ci_hdrc *ci) 364 { 365 int ret; 366 367 if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL) 368 return 0; 369 370 switch (ci->platdata->phy_mode) { 371 case USBPHY_INTERFACE_MODE_UTMI: 372 case USBPHY_INTERFACE_MODE_UTMIW: 373 case USBPHY_INTERFACE_MODE_HSIC: 374 ret = _ci_usb_phy_init(ci); 375 if (!ret) 376 hw_wait_phy_stable(); 377 else 378 return ret; 379 hw_phymode_configure(ci); 380 break; 381 case USBPHY_INTERFACE_MODE_ULPI: 382 case USBPHY_INTERFACE_MODE_SERIAL: 383 hw_phymode_configure(ci); 384 ret = _ci_usb_phy_init(ci); 385 if (ret) 386 return ret; 387 break; 388 default: 389 ret = _ci_usb_phy_init(ci); 390 if (!ret) 391 hw_wait_phy_stable(); 392 } 393 394 return ret; 395 } 396 397 398 /** 399 * ci_platform_configure: do controller configure 400 * @ci: the controller 401 * 402 */ 403 void ci_platform_configure(struct ci_hdrc *ci) 404 { 405 bool is_device_mode, is_host_mode; 406 407 is_device_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_DC; 408 is_host_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_HC; 409 410 if (is_device_mode) { 411 phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE); 412 413 if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING) 414 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, 415 USBMODE_CI_SDIS); 416 } 417 418 if (is_host_mode) { 419 phy_set_mode(ci->phy, PHY_MODE_USB_HOST); 420 421 if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING) 422 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, 423 USBMODE_CI_SDIS); 424 } 425 426 if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) { 427 if (ci->hw_bank.lpm) 428 hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC); 429 else 430 hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC); 431 } 432 433 if (ci->platdata->flags & CI_HDRC_SET_NON_ZERO_TTHA) 434 hw_write(ci, OP_TTCTRL, TTCTRL_TTHA_MASK, TTCTRL_TTHA); 435 436 hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16); 437 438 if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST) 439 hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK, 440 ci->platdata->ahb_burst_config); 441 442 /* override burst size, take effect only when ahb_burst_config is 0 */ 443 if (!hw_read_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK)) { 444 if (ci->platdata->flags & CI_HDRC_OVERRIDE_TX_BURST) 445 hw_write(ci, OP_BURSTSIZE, TX_BURST_MASK, 446 ci->platdata->tx_burst_size << __ffs(TX_BURST_MASK)); 447 448 if (ci->platdata->flags & CI_HDRC_OVERRIDE_RX_BURST) 449 hw_write(ci, OP_BURSTSIZE, RX_BURST_MASK, 450 ci->platdata->rx_burst_size); 451 } 452 } 453 454 /** 455 * hw_controller_reset: do controller reset 456 * @ci: the controller 457 * 458 * This function returns an error code 459 */ 460 static int hw_controller_reset(struct ci_hdrc *ci) 461 { 462 int count = 0; 463 464 hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST); 465 while (hw_read(ci, OP_USBCMD, USBCMD_RST)) { 466 udelay(10); 467 if (count++ > 1000) 468 return -ETIMEDOUT; 469 } 470 471 return 0; 472 } 473 474 /** 475 * hw_device_reset: resets chip (execute without interruption) 476 * @ci: the controller 477 * 478 * This function returns an error code 479 */ 480 int hw_device_reset(struct ci_hdrc *ci) 481 { 482 int ret; 483 484 /* should flush & stop before reset */ 485 hw_write(ci, OP_ENDPTFLUSH, ~0, ~0); 486 hw_write(ci, OP_USBCMD, USBCMD_RS, 0); 487 488 ret = hw_controller_reset(ci); 489 if (ret) { 490 dev_err(ci->dev, "error resetting controller, ret=%d\n", ret); 491 return ret; 492 } 493 494 if (ci->platdata->notify_event) { 495 ret = ci->platdata->notify_event(ci, 496 CI_HDRC_CONTROLLER_RESET_EVENT); 497 if (ret) 498 return ret; 499 } 500 501 /* USBMODE should be configured step by step */ 502 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE); 503 hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DC); 504 /* HW >= 2.3 */ 505 hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); 506 507 if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DC) { 508 dev_err(ci->dev, "cannot enter in %s device mode\n", 509 ci_role(ci)->name); 510 dev_err(ci->dev, "lpm = %i\n", ci->hw_bank.lpm); 511 return -ENODEV; 512 } 513 514 ci_platform_configure(ci); 515 516 return 0; 517 } 518 519 static irqreturn_t ci_irq_handler(int irq, void *data) 520 { 521 struct ci_hdrc *ci = data; 522 irqreturn_t ret = IRQ_NONE; 523 u32 otgsc = 0; 524 525 if (ci->in_lpm) { 526 /* 527 * If we already have a wakeup irq pending there, 528 * let's just return to wait resume finished firstly. 529 */ 530 if (ci->wakeup_int) 531 return IRQ_HANDLED; 532 533 disable_irq_nosync(irq); 534 ci->wakeup_int = true; 535 pm_runtime_get(ci->dev); 536 return IRQ_HANDLED; 537 } 538 539 if (ci->is_otg) { 540 otgsc = hw_read_otgsc(ci, ~0); 541 if (ci_otg_is_fsm_mode(ci)) { 542 ret = ci_otg_fsm_irq(ci); 543 if (ret == IRQ_HANDLED) 544 return ret; 545 } 546 } 547 548 /* 549 * Handle id change interrupt, it indicates device/host function 550 * switch. 551 */ 552 if (ci->is_otg && (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) { 553 ci->id_event = true; 554 /* Clear ID change irq status */ 555 hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS); 556 ci_otg_queue_work(ci); 557 return IRQ_HANDLED; 558 } 559 560 /* 561 * Handle vbus change interrupt, it indicates device connection 562 * and disconnection events. 563 */ 564 if (ci->is_otg && (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) { 565 ci->b_sess_valid_event = true; 566 /* Clear BSV irq */ 567 hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS); 568 ci_otg_queue_work(ci); 569 return IRQ_HANDLED; 570 } 571 572 /* Handle device/host interrupt */ 573 if (ci->role != CI_ROLE_END) 574 ret = ci_role(ci)->irq(ci); 575 576 return ret; 577 } 578 579 static void ci_irq(struct ci_hdrc *ci) 580 { 581 unsigned long flags; 582 583 local_irq_save(flags); 584 ci_irq_handler(ci->irq, ci); 585 local_irq_restore(flags); 586 } 587 588 static int ci_cable_notifier(struct notifier_block *nb, unsigned long event, 589 void *ptr) 590 { 591 struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb); 592 struct ci_hdrc *ci = cbl->ci; 593 594 cbl->connected = event; 595 cbl->changed = true; 596 597 ci_irq(ci); 598 return NOTIFY_DONE; 599 } 600 601 static enum usb_role ci_usb_role_switch_get(struct usb_role_switch *sw) 602 { 603 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw); 604 enum usb_role role; 605 unsigned long flags; 606 607 spin_lock_irqsave(&ci->lock, flags); 608 role = ci_role_to_usb_role(ci); 609 spin_unlock_irqrestore(&ci->lock, flags); 610 611 return role; 612 } 613 614 static int ci_usb_role_switch_set(struct usb_role_switch *sw, 615 enum usb_role role) 616 { 617 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw); 618 struct ci_hdrc_cable *cable; 619 620 if (role == USB_ROLE_HOST) { 621 cable = &ci->platdata->id_extcon; 622 cable->changed = true; 623 cable->connected = true; 624 cable = &ci->platdata->vbus_extcon; 625 cable->changed = true; 626 cable->connected = false; 627 } else if (role == USB_ROLE_DEVICE) { 628 cable = &ci->platdata->id_extcon; 629 cable->changed = true; 630 cable->connected = false; 631 cable = &ci->platdata->vbus_extcon; 632 cable->changed = true; 633 cable->connected = true; 634 } else { 635 cable = &ci->platdata->id_extcon; 636 cable->changed = true; 637 cable->connected = false; 638 cable = &ci->platdata->vbus_extcon; 639 cable->changed = true; 640 cable->connected = false; 641 } 642 643 ci_irq(ci); 644 return 0; 645 } 646 647 static enum ci_role ci_get_role(struct ci_hdrc *ci) 648 { 649 enum ci_role role; 650 651 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) { 652 if (ci->is_otg) { 653 role = ci_otg_role(ci); 654 hw_write_otgsc(ci, OTGSC_IDIE, OTGSC_IDIE); 655 } else { 656 /* 657 * If the controller is not OTG capable, but support 658 * role switch, the defalt role is gadget, and the 659 * user can switch it through debugfs. 660 */ 661 role = CI_ROLE_GADGET; 662 } 663 } else { 664 role = ci->roles[CI_ROLE_HOST] ? CI_ROLE_HOST 665 : CI_ROLE_GADGET; 666 } 667 668 return role; 669 } 670 671 static struct usb_role_switch_desc ci_role_switch = { 672 .set = ci_usb_role_switch_set, 673 .get = ci_usb_role_switch_get, 674 .allow_userspace_control = true, 675 }; 676 677 static int ci_get_platdata(struct device *dev, 678 struct ci_hdrc_platform_data *platdata) 679 { 680 struct extcon_dev *ext_vbus, *ext_id; 681 struct ci_hdrc_cable *cable; 682 int ret; 683 684 if (!platdata->phy_mode) 685 platdata->phy_mode = of_usb_get_phy_mode(dev->of_node); 686 687 if (!platdata->dr_mode) 688 platdata->dr_mode = usb_get_dr_mode(dev); 689 690 if (platdata->dr_mode == USB_DR_MODE_UNKNOWN) 691 platdata->dr_mode = USB_DR_MODE_OTG; 692 693 if (platdata->dr_mode != USB_DR_MODE_PERIPHERAL) { 694 /* Get the vbus regulator */ 695 platdata->reg_vbus = devm_regulator_get_optional(dev, "vbus"); 696 if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) { 697 return -EPROBE_DEFER; 698 } else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) { 699 /* no vbus regulator is needed */ 700 platdata->reg_vbus = NULL; 701 } else if (IS_ERR(platdata->reg_vbus)) { 702 dev_err(dev, "Getting regulator error: %ld\n", 703 PTR_ERR(platdata->reg_vbus)); 704 return PTR_ERR(platdata->reg_vbus); 705 } 706 /* Get TPL support */ 707 if (!platdata->tpl_support) 708 platdata->tpl_support = 709 of_usb_host_tpl_support(dev->of_node); 710 } 711 712 if (platdata->dr_mode == USB_DR_MODE_OTG) { 713 /* We can support HNP and SRP of OTG 2.0 */ 714 platdata->ci_otg_caps.otg_rev = 0x0200; 715 platdata->ci_otg_caps.hnp_support = true; 716 platdata->ci_otg_caps.srp_support = true; 717 718 /* Update otg capabilities by DT properties */ 719 ret = of_usb_update_otg_caps(dev->of_node, 720 &platdata->ci_otg_caps); 721 if (ret) 722 return ret; 723 } 724 725 if (usb_get_maximum_speed(dev) == USB_SPEED_FULL) 726 platdata->flags |= CI_HDRC_FORCE_FULLSPEED; 727 728 of_property_read_u32(dev->of_node, "phy-clkgate-delay-us", 729 &platdata->phy_clkgate_delay_us); 730 731 platdata->itc_setting = 1; 732 733 of_property_read_u32(dev->of_node, "itc-setting", 734 &platdata->itc_setting); 735 736 ret = of_property_read_u32(dev->of_node, "ahb-burst-config", 737 &platdata->ahb_burst_config); 738 if (!ret) { 739 platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST; 740 } else if (ret != -EINVAL) { 741 dev_err(dev, "failed to get ahb-burst-config\n"); 742 return ret; 743 } 744 745 ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword", 746 &platdata->tx_burst_size); 747 if (!ret) { 748 platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST; 749 } else if (ret != -EINVAL) { 750 dev_err(dev, "failed to get tx-burst-size-dword\n"); 751 return ret; 752 } 753 754 ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword", 755 &platdata->rx_burst_size); 756 if (!ret) { 757 platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST; 758 } else if (ret != -EINVAL) { 759 dev_err(dev, "failed to get rx-burst-size-dword\n"); 760 return ret; 761 } 762 763 if (of_property_read_bool(dev->of_node, "non-zero-ttctrl-ttha")) 764 platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA; 765 766 ext_id = ERR_PTR(-ENODEV); 767 ext_vbus = ERR_PTR(-ENODEV); 768 if (of_property_read_bool(dev->of_node, "extcon")) { 769 /* Each one of them is not mandatory */ 770 ext_vbus = extcon_get_edev_by_phandle(dev, 0); 771 if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV) 772 return PTR_ERR(ext_vbus); 773 774 ext_id = extcon_get_edev_by_phandle(dev, 1); 775 if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV) 776 return PTR_ERR(ext_id); 777 } 778 779 cable = &platdata->vbus_extcon; 780 cable->nb.notifier_call = ci_cable_notifier; 781 cable->edev = ext_vbus; 782 783 if (!IS_ERR(ext_vbus)) { 784 ret = extcon_get_state(cable->edev, EXTCON_USB); 785 if (ret) 786 cable->connected = true; 787 else 788 cable->connected = false; 789 } 790 791 cable = &platdata->id_extcon; 792 cable->nb.notifier_call = ci_cable_notifier; 793 cable->edev = ext_id; 794 795 if (!IS_ERR(ext_id)) { 796 ret = extcon_get_state(cable->edev, EXTCON_USB_HOST); 797 if (ret) 798 cable->connected = true; 799 else 800 cable->connected = false; 801 } 802 803 if (device_property_read_bool(dev, "usb-role-switch")) 804 ci_role_switch.fwnode = dev->fwnode; 805 806 platdata->pctl = devm_pinctrl_get(dev); 807 if (!IS_ERR(platdata->pctl)) { 808 struct pinctrl_state *p; 809 810 p = pinctrl_lookup_state(platdata->pctl, "default"); 811 if (!IS_ERR(p)) 812 platdata->pins_default = p; 813 814 p = pinctrl_lookup_state(platdata->pctl, "host"); 815 if (!IS_ERR(p)) 816 platdata->pins_host = p; 817 818 p = pinctrl_lookup_state(platdata->pctl, "device"); 819 if (!IS_ERR(p)) 820 platdata->pins_device = p; 821 } 822 823 if (!platdata->enter_lpm) 824 platdata->enter_lpm = ci_hdrc_enter_lpm_common; 825 826 return 0; 827 } 828 829 static int ci_extcon_register(struct ci_hdrc *ci) 830 { 831 struct ci_hdrc_cable *id, *vbus; 832 int ret; 833 834 id = &ci->platdata->id_extcon; 835 id->ci = ci; 836 if (!IS_ERR_OR_NULL(id->edev)) { 837 ret = devm_extcon_register_notifier(ci->dev, id->edev, 838 EXTCON_USB_HOST, &id->nb); 839 if (ret < 0) { 840 dev_err(ci->dev, "register ID failed\n"); 841 return ret; 842 } 843 } 844 845 vbus = &ci->platdata->vbus_extcon; 846 vbus->ci = ci; 847 if (!IS_ERR_OR_NULL(vbus->edev)) { 848 ret = devm_extcon_register_notifier(ci->dev, vbus->edev, 849 EXTCON_USB, &vbus->nb); 850 if (ret < 0) { 851 dev_err(ci->dev, "register VBUS failed\n"); 852 return ret; 853 } 854 } 855 856 return 0; 857 } 858 859 static void ci_power_lost_work(struct work_struct *work) 860 { 861 struct ci_hdrc *ci = container_of(work, struct ci_hdrc, power_lost_work); 862 enum ci_role role; 863 864 disable_irq_nosync(ci->irq); 865 pm_runtime_get_sync(ci->dev); 866 if (!ci_otg_is_fsm_mode(ci)) { 867 role = ci_get_role(ci); 868 869 if (ci->role != role) { 870 ci_handle_id_switch(ci); 871 } else if (role == CI_ROLE_GADGET) { 872 if (ci->is_otg && hw_read_otgsc(ci, OTGSC_BSV)) 873 usb_gadget_vbus_connect(&ci->gadget); 874 } 875 } 876 pm_runtime_put_sync(ci->dev); 877 enable_irq(ci->irq); 878 } 879 880 static DEFINE_IDA(ci_ida); 881 882 struct platform_device *ci_hdrc_add_device(struct device *dev, 883 struct resource *res, int nres, 884 struct ci_hdrc_platform_data *platdata) 885 { 886 struct platform_device *pdev; 887 int id, ret; 888 889 ret = ci_get_platdata(dev, platdata); 890 if (ret) 891 return ERR_PTR(ret); 892 893 id = ida_alloc(&ci_ida, GFP_KERNEL); 894 if (id < 0) 895 return ERR_PTR(id); 896 897 pdev = platform_device_alloc("ci_hdrc", id); 898 if (!pdev) { 899 ret = -ENOMEM; 900 goto put_id; 901 } 902 903 pdev->dev.parent = dev; 904 device_set_of_node_from_dev(&pdev->dev, dev); 905 906 ret = platform_device_add_resources(pdev, res, nres); 907 if (ret) 908 goto err; 909 910 ret = platform_device_add_data(pdev, platdata, sizeof(*platdata)); 911 if (ret) 912 goto err; 913 914 ret = platform_device_add(pdev); 915 if (ret) 916 goto err; 917 918 return pdev; 919 920 err: 921 platform_device_put(pdev); 922 put_id: 923 ida_free(&ci_ida, id); 924 return ERR_PTR(ret); 925 } 926 EXPORT_SYMBOL_GPL(ci_hdrc_add_device); 927 928 void ci_hdrc_remove_device(struct platform_device *pdev) 929 { 930 int id = pdev->id; 931 platform_device_unregister(pdev); 932 ida_free(&ci_ida, id); 933 } 934 EXPORT_SYMBOL_GPL(ci_hdrc_remove_device); 935 936 /** 937 * ci_hdrc_query_available_role: get runtime available operation mode 938 * 939 * The glue layer can get current operation mode (host/peripheral/otg) 940 * This function should be called after ci core device has created. 941 * 942 * @pdev: the platform device of ci core. 943 * 944 * Return runtime usb_dr_mode. 945 */ 946 enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev) 947 { 948 struct ci_hdrc *ci = platform_get_drvdata(pdev); 949 950 if (!ci) 951 return USB_DR_MODE_UNKNOWN; 952 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) 953 return USB_DR_MODE_OTG; 954 else if (ci->roles[CI_ROLE_HOST]) 955 return USB_DR_MODE_HOST; 956 else if (ci->roles[CI_ROLE_GADGET]) 957 return USB_DR_MODE_PERIPHERAL; 958 else 959 return USB_DR_MODE_UNKNOWN; 960 } 961 EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role); 962 963 static inline void ci_role_destroy(struct ci_hdrc *ci) 964 { 965 ci_hdrc_gadget_destroy(ci); 966 ci_hdrc_host_destroy(ci); 967 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) 968 ci_hdrc_otg_destroy(ci); 969 } 970 971 static void ci_get_otg_capable(struct ci_hdrc *ci) 972 { 973 if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG) 974 ci->is_otg = false; 975 else 976 ci->is_otg = (hw_read(ci, CAP_DCCPARAMS, 977 DCCPARAMS_DC | DCCPARAMS_HC) 978 == (DCCPARAMS_DC | DCCPARAMS_HC)); 979 if (ci->is_otg) { 980 dev_dbg(ci->dev, "It is OTG capable controller\n"); 981 /* Disable and clear all OTG irq */ 982 hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS, 983 OTGSC_INT_STATUS_BITS); 984 } 985 } 986 987 static ssize_t role_show(struct device *dev, struct device_attribute *attr, 988 char *buf) 989 { 990 struct ci_hdrc *ci = dev_get_drvdata(dev); 991 992 if (ci->role != CI_ROLE_END) 993 return sprintf(buf, "%s\n", ci_role(ci)->name); 994 995 return 0; 996 } 997 998 static ssize_t role_store(struct device *dev, 999 struct device_attribute *attr, const char *buf, size_t n) 1000 { 1001 struct ci_hdrc *ci = dev_get_drvdata(dev); 1002 enum ci_role role; 1003 int ret; 1004 1005 if (!(ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])) { 1006 dev_warn(dev, "Current configuration is not dual-role, quit\n"); 1007 return -EPERM; 1008 } 1009 1010 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) 1011 if (!strncmp(buf, ci->roles[role]->name, 1012 strlen(ci->roles[role]->name))) 1013 break; 1014 1015 if (role == CI_ROLE_END) 1016 return -EINVAL; 1017 1018 mutex_lock(&ci->mutex); 1019 1020 if (role == ci->role) { 1021 mutex_unlock(&ci->mutex); 1022 return n; 1023 } 1024 1025 pm_runtime_get_sync(dev); 1026 disable_irq(ci->irq); 1027 ci_role_stop(ci); 1028 ret = ci_role_start(ci, role); 1029 if (!ret && ci->role == CI_ROLE_GADGET) 1030 ci_handle_vbus_change(ci); 1031 enable_irq(ci->irq); 1032 pm_runtime_put_sync(dev); 1033 mutex_unlock(&ci->mutex); 1034 1035 return (ret == 0) ? n : ret; 1036 } 1037 static DEVICE_ATTR_RW(role); 1038 1039 static struct attribute *ci_attrs[] = { 1040 &dev_attr_role.attr, 1041 NULL, 1042 }; 1043 ATTRIBUTE_GROUPS(ci); 1044 1045 static int ci_hdrc_probe(struct platform_device *pdev) 1046 { 1047 struct device *dev = &pdev->dev; 1048 struct ci_hdrc *ci; 1049 struct resource *res; 1050 void __iomem *base; 1051 int ret; 1052 enum usb_dr_mode dr_mode; 1053 1054 if (!dev_get_platdata(dev)) { 1055 dev_err(dev, "platform data missing\n"); 1056 return -ENODEV; 1057 } 1058 1059 base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 1060 if (IS_ERR(base)) 1061 return PTR_ERR(base); 1062 1063 ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL); 1064 if (!ci) 1065 return -ENOMEM; 1066 1067 spin_lock_init(&ci->lock); 1068 mutex_init(&ci->mutex); 1069 INIT_WORK(&ci->power_lost_work, ci_power_lost_work); 1070 1071 ci->dev = dev; 1072 ci->platdata = dev_get_platdata(dev); 1073 ci->imx28_write_fix = !!(ci->platdata->flags & 1074 CI_HDRC_IMX28_WRITE_FIX); 1075 ci->supports_runtime_pm = !!(ci->platdata->flags & 1076 CI_HDRC_SUPPORTS_RUNTIME_PM); 1077 ci->has_portsc_pec_bug = !!(ci->platdata->flags & 1078 CI_HDRC_HAS_PORTSC_PEC_MISSED); 1079 platform_set_drvdata(pdev, ci); 1080 1081 ret = hw_device_init(ci, base); 1082 if (ret < 0) { 1083 dev_err(dev, "can't initialize hardware\n"); 1084 return -ENODEV; 1085 } 1086 1087 ret = ci_ulpi_init(ci); 1088 if (ret) 1089 return ret; 1090 1091 if (ci->platdata->phy) { 1092 ci->phy = ci->platdata->phy; 1093 } else if (ci->platdata->usb_phy) { 1094 ci->usb_phy = ci->platdata->usb_phy; 1095 } else { 1096 /* Look for a generic PHY first */ 1097 ci->phy = devm_phy_get(dev->parent, "usb-phy"); 1098 1099 if (PTR_ERR(ci->phy) == -EPROBE_DEFER) { 1100 ret = -EPROBE_DEFER; 1101 goto ulpi_exit; 1102 } else if (IS_ERR(ci->phy)) { 1103 ci->phy = NULL; 1104 } 1105 1106 /* Look for a legacy USB PHY from device-tree next */ 1107 if (!ci->phy) { 1108 ci->usb_phy = devm_usb_get_phy_by_phandle(dev->parent, 1109 "phys", 0); 1110 1111 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) { 1112 ret = -EPROBE_DEFER; 1113 goto ulpi_exit; 1114 } else if (IS_ERR(ci->usb_phy)) { 1115 ci->usb_phy = NULL; 1116 } 1117 } 1118 1119 /* Look for any registered legacy USB PHY as last resort */ 1120 if (!ci->phy && !ci->usb_phy) { 1121 ci->usb_phy = devm_usb_get_phy(dev->parent, 1122 USB_PHY_TYPE_USB2); 1123 1124 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) { 1125 ret = -EPROBE_DEFER; 1126 goto ulpi_exit; 1127 } else if (IS_ERR(ci->usb_phy)) { 1128 ci->usb_phy = NULL; 1129 } 1130 } 1131 1132 /* No USB PHY was found in the end */ 1133 if (!ci->phy && !ci->usb_phy) { 1134 ret = -ENXIO; 1135 goto ulpi_exit; 1136 } 1137 } 1138 1139 ret = ci_usb_phy_init(ci); 1140 if (ret) { 1141 dev_err(dev, "unable to init phy: %d\n", ret); 1142 goto ulpi_exit; 1143 } 1144 1145 ci->hw_bank.phys = res->start; 1146 1147 ci->irq = platform_get_irq(pdev, 0); 1148 if (ci->irq < 0) { 1149 ret = ci->irq; 1150 goto deinit_phy; 1151 } 1152 1153 ci_get_otg_capable(ci); 1154 1155 dr_mode = ci->platdata->dr_mode; 1156 /* initialize role(s) before the interrupt is requested */ 1157 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { 1158 ret = ci_hdrc_host_init(ci); 1159 if (ret) { 1160 if (ret == -ENXIO) 1161 dev_info(dev, "doesn't support host\n"); 1162 else 1163 goto deinit_phy; 1164 } 1165 } 1166 1167 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) { 1168 ret = ci_hdrc_gadget_init(ci); 1169 if (ret) { 1170 if (ret == -ENXIO) 1171 dev_info(dev, "doesn't support gadget\n"); 1172 else 1173 goto deinit_host; 1174 } 1175 } 1176 1177 if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) { 1178 dev_err(dev, "no supported roles\n"); 1179 ret = -ENODEV; 1180 goto deinit_gadget; 1181 } 1182 1183 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) { 1184 ret = ci_hdrc_otg_init(ci); 1185 if (ret) { 1186 dev_err(dev, "init otg fails, ret = %d\n", ret); 1187 goto deinit_gadget; 1188 } 1189 } 1190 1191 if (ci_role_switch.fwnode) { 1192 ci_role_switch.driver_data = ci; 1193 ci->role_switch = usb_role_switch_register(dev, 1194 &ci_role_switch); 1195 if (IS_ERR(ci->role_switch)) { 1196 ret = PTR_ERR(ci->role_switch); 1197 goto deinit_otg; 1198 } 1199 } 1200 1201 ci->role = ci_get_role(ci); 1202 if (!ci_otg_is_fsm_mode(ci)) { 1203 /* only update vbus status for peripheral */ 1204 if (ci->role == CI_ROLE_GADGET) { 1205 /* Pull down DP for possible charger detection */ 1206 hw_write(ci, OP_USBCMD, USBCMD_RS, 0); 1207 ci_handle_vbus_change(ci); 1208 } 1209 1210 ret = ci_role_start(ci, ci->role); 1211 if (ret) { 1212 dev_err(dev, "can't start %s role\n", 1213 ci_role(ci)->name); 1214 goto stop; 1215 } 1216 } 1217 1218 ret = devm_request_irq(dev, ci->irq, ci_irq_handler, IRQF_SHARED, 1219 ci->platdata->name, ci); 1220 if (ret) 1221 goto stop; 1222 1223 ret = ci_extcon_register(ci); 1224 if (ret) 1225 goto stop; 1226 1227 if (ci->supports_runtime_pm) { 1228 pm_runtime_set_active(&pdev->dev); 1229 pm_runtime_enable(&pdev->dev); 1230 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); 1231 pm_runtime_mark_last_busy(ci->dev); 1232 pm_runtime_use_autosuspend(&pdev->dev); 1233 } 1234 1235 if (ci_otg_is_fsm_mode(ci)) 1236 ci_hdrc_otg_fsm_start(ci); 1237 1238 device_set_wakeup_capable(&pdev->dev, true); 1239 dbg_create_files(ci); 1240 1241 return 0; 1242 1243 stop: 1244 if (ci->role_switch) 1245 usb_role_switch_unregister(ci->role_switch); 1246 deinit_otg: 1247 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) 1248 ci_hdrc_otg_destroy(ci); 1249 deinit_gadget: 1250 ci_hdrc_gadget_destroy(ci); 1251 deinit_host: 1252 ci_hdrc_host_destroy(ci); 1253 deinit_phy: 1254 ci_usb_phy_exit(ci); 1255 ulpi_exit: 1256 ci_ulpi_exit(ci); 1257 1258 return ret; 1259 } 1260 1261 static void ci_hdrc_remove(struct platform_device *pdev) 1262 { 1263 struct ci_hdrc *ci = platform_get_drvdata(pdev); 1264 1265 if (ci->role_switch) 1266 usb_role_switch_unregister(ci->role_switch); 1267 1268 if (ci->supports_runtime_pm) { 1269 pm_runtime_get_sync(&pdev->dev); 1270 pm_runtime_disable(&pdev->dev); 1271 pm_runtime_put_noidle(&pdev->dev); 1272 } 1273 1274 dbg_remove_files(ci); 1275 ci_role_destroy(ci); 1276 ci_hdrc_enter_lpm(ci, true); 1277 ci_usb_phy_exit(ci); 1278 ci_ulpi_exit(ci); 1279 } 1280 1281 #ifdef CONFIG_PM 1282 /* Prepare wakeup by SRP before suspend */ 1283 static void ci_otg_fsm_suspend_for_srp(struct ci_hdrc *ci) 1284 { 1285 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) && 1286 !hw_read_otgsc(ci, OTGSC_ID)) { 1287 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP, 1288 PORTSC_PP); 1289 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_WKCN, 1290 PORTSC_WKCN); 1291 } 1292 } 1293 1294 /* Handle SRP when wakeup by data pulse */ 1295 static void ci_otg_fsm_wakeup_by_srp(struct ci_hdrc *ci) 1296 { 1297 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) && 1298 (ci->fsm.a_bus_drop == 1) && (ci->fsm.a_bus_req == 0)) { 1299 if (!hw_read_otgsc(ci, OTGSC_ID)) { 1300 ci->fsm.a_srp_det = 1; 1301 ci->fsm.a_bus_drop = 0; 1302 } else { 1303 ci->fsm.id = 1; 1304 } 1305 ci_otg_queue_work(ci); 1306 } 1307 } 1308 1309 static void ci_controller_suspend(struct ci_hdrc *ci) 1310 { 1311 disable_irq(ci->irq); 1312 ci_hdrc_enter_lpm(ci, true); 1313 if (ci->platdata->phy_clkgate_delay_us) 1314 usleep_range(ci->platdata->phy_clkgate_delay_us, 1315 ci->platdata->phy_clkgate_delay_us + 50); 1316 usb_phy_set_suspend(ci->usb_phy, 1); 1317 ci->in_lpm = true; 1318 enable_irq(ci->irq); 1319 } 1320 1321 /* 1322 * Handle the wakeup interrupt triggered by extcon connector 1323 * We need to call ci_irq again for extcon since the first 1324 * interrupt (wakeup int) only let the controller be out of 1325 * low power mode, but not handle any interrupts. 1326 */ 1327 static void ci_extcon_wakeup_int(struct ci_hdrc *ci) 1328 { 1329 struct ci_hdrc_cable *cable_id, *cable_vbus; 1330 u32 otgsc = hw_read_otgsc(ci, ~0); 1331 1332 cable_id = &ci->platdata->id_extcon; 1333 cable_vbus = &ci->platdata->vbus_extcon; 1334 1335 if ((!IS_ERR(cable_id->edev) || ci->role_switch) 1336 && ci->is_otg && 1337 (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) 1338 ci_irq(ci); 1339 1340 if ((!IS_ERR(cable_vbus->edev) || ci->role_switch) 1341 && ci->is_otg && 1342 (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) 1343 ci_irq(ci); 1344 } 1345 1346 static int ci_controller_resume(struct device *dev) 1347 { 1348 struct ci_hdrc *ci = dev_get_drvdata(dev); 1349 int ret; 1350 1351 dev_dbg(dev, "at %s\n", __func__); 1352 1353 if (!ci->in_lpm) { 1354 WARN_ON(1); 1355 return 0; 1356 } 1357 1358 ci_hdrc_enter_lpm(ci, false); 1359 1360 ret = ci_ulpi_resume(ci); 1361 if (ret) 1362 return ret; 1363 1364 if (ci->usb_phy) { 1365 usb_phy_set_suspend(ci->usb_phy, 0); 1366 usb_phy_set_wakeup(ci->usb_phy, false); 1367 hw_wait_phy_stable(); 1368 } 1369 1370 ci->in_lpm = false; 1371 if (ci->wakeup_int) { 1372 ci->wakeup_int = false; 1373 pm_runtime_mark_last_busy(ci->dev); 1374 pm_runtime_put_autosuspend(ci->dev); 1375 enable_irq(ci->irq); 1376 if (ci_otg_is_fsm_mode(ci)) 1377 ci_otg_fsm_wakeup_by_srp(ci); 1378 ci_extcon_wakeup_int(ci); 1379 } 1380 1381 return 0; 1382 } 1383 1384 #ifdef CONFIG_PM_SLEEP 1385 static int ci_suspend(struct device *dev) 1386 { 1387 struct ci_hdrc *ci = dev_get_drvdata(dev); 1388 1389 if (ci->wq) 1390 flush_workqueue(ci->wq); 1391 /* 1392 * Controller needs to be active during suspend, otherwise the core 1393 * may run resume when the parent is at suspend if other driver's 1394 * suspend fails, it occurs before parent's suspend has not started, 1395 * but the core suspend has finished. 1396 */ 1397 if (ci->in_lpm) 1398 pm_runtime_resume(dev); 1399 1400 if (ci->in_lpm) { 1401 WARN_ON(1); 1402 return 0; 1403 } 1404 1405 /* Extra routine per role before system suspend */ 1406 if (ci->role != CI_ROLE_END && ci_role(ci)->suspend) 1407 ci_role(ci)->suspend(ci); 1408 1409 if (device_may_wakeup(dev)) { 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 enable_irq_wake(ci->irq); 1415 } 1416 1417 ci_controller_suspend(ci); 1418 1419 return 0; 1420 } 1421 1422 static int ci_resume(struct device *dev) 1423 { 1424 struct ci_hdrc *ci = dev_get_drvdata(dev); 1425 bool power_lost; 1426 int ret; 1427 1428 /* Since ASYNCLISTADDR (host mode) and ENDPTLISTADDR (device 1429 * mode) share the same register address. We can check if 1430 * controller resume from power lost based on this address 1431 * due to this register will be reset after power lost. 1432 */ 1433 power_lost = !hw_read(ci, OP_ENDPTLISTADDR, ~0); 1434 1435 if (device_may_wakeup(dev)) 1436 disable_irq_wake(ci->irq); 1437 1438 ret = ci_controller_resume(dev); 1439 if (ret) 1440 return ret; 1441 1442 if (power_lost) { 1443 /* shutdown and re-init for phy */ 1444 ci_usb_phy_exit(ci); 1445 ci_usb_phy_init(ci); 1446 } 1447 1448 /* Extra routine per role after system resume */ 1449 if (ci->role != CI_ROLE_END && ci_role(ci)->resume) 1450 ci_role(ci)->resume(ci, power_lost); 1451 1452 if (power_lost) 1453 queue_work(system_freezable_wq, &ci->power_lost_work); 1454 1455 if (ci->supports_runtime_pm) { 1456 pm_runtime_disable(dev); 1457 pm_runtime_set_active(dev); 1458 pm_runtime_enable(dev); 1459 } 1460 1461 return ret; 1462 } 1463 #endif /* CONFIG_PM_SLEEP */ 1464 1465 static int ci_runtime_suspend(struct device *dev) 1466 { 1467 struct ci_hdrc *ci = dev_get_drvdata(dev); 1468 1469 dev_dbg(dev, "at %s\n", __func__); 1470 1471 if (ci->in_lpm) { 1472 WARN_ON(1); 1473 return 0; 1474 } 1475 1476 if (ci_otg_is_fsm_mode(ci)) 1477 ci_otg_fsm_suspend_for_srp(ci); 1478 1479 usb_phy_set_wakeup(ci->usb_phy, true); 1480 ci_controller_suspend(ci); 1481 1482 return 0; 1483 } 1484 1485 static int ci_runtime_resume(struct device *dev) 1486 { 1487 return ci_controller_resume(dev); 1488 } 1489 1490 #endif /* CONFIG_PM */ 1491 static const struct dev_pm_ops ci_pm_ops = { 1492 SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume) 1493 SET_RUNTIME_PM_OPS(ci_runtime_suspend, ci_runtime_resume, NULL) 1494 }; 1495 1496 static struct platform_driver ci_hdrc_driver = { 1497 .probe = ci_hdrc_probe, 1498 .remove_new = ci_hdrc_remove, 1499 .driver = { 1500 .name = "ci_hdrc", 1501 .pm = &ci_pm_ops, 1502 .dev_groups = ci_groups, 1503 }, 1504 }; 1505 1506 static int __init ci_hdrc_platform_register(void) 1507 { 1508 ci_hdrc_host_driver_init(); 1509 return platform_driver_register(&ci_hdrc_driver); 1510 } 1511 module_init(ci_hdrc_platform_register); 1512 1513 static void __exit ci_hdrc_platform_unregister(void) 1514 { 1515 platform_driver_unregister(&ci_hdrc_driver); 1516 } 1517 module_exit(ci_hdrc_platform_unregister); 1518 1519 MODULE_ALIAS("platform:ci_hdrc"); 1520 MODULE_LICENSE("GPL v2"); 1521 MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>"); 1522 MODULE_DESCRIPTION("ChipIdea HDRC Driver"); 1523