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 disable_irq_nosync(irq); 527 ci->wakeup_int = true; 528 pm_runtime_get(ci->dev); 529 return IRQ_HANDLED; 530 } 531 532 if (ci->is_otg) { 533 otgsc = hw_read_otgsc(ci, ~0); 534 if (ci_otg_is_fsm_mode(ci)) { 535 ret = ci_otg_fsm_irq(ci); 536 if (ret == IRQ_HANDLED) 537 return ret; 538 } 539 } 540 541 /* 542 * Handle id change interrupt, it indicates device/host function 543 * switch. 544 */ 545 if (ci->is_otg && (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) { 546 ci->id_event = true; 547 /* Clear ID change irq status */ 548 hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS); 549 ci_otg_queue_work(ci); 550 return IRQ_HANDLED; 551 } 552 553 /* 554 * Handle vbus change interrupt, it indicates device connection 555 * and disconnection events. 556 */ 557 if (ci->is_otg && (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) { 558 ci->b_sess_valid_event = true; 559 /* Clear BSV irq */ 560 hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS); 561 ci_otg_queue_work(ci); 562 return IRQ_HANDLED; 563 } 564 565 /* Handle device/host interrupt */ 566 if (ci->role != CI_ROLE_END) 567 ret = ci_role(ci)->irq(ci); 568 569 return ret; 570 } 571 572 static void ci_irq(struct ci_hdrc *ci) 573 { 574 unsigned long flags; 575 576 local_irq_save(flags); 577 ci_irq_handler(ci->irq, ci); 578 local_irq_restore(flags); 579 } 580 581 static int ci_cable_notifier(struct notifier_block *nb, unsigned long event, 582 void *ptr) 583 { 584 struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb); 585 struct ci_hdrc *ci = cbl->ci; 586 587 cbl->connected = event; 588 cbl->changed = true; 589 590 ci_irq(ci); 591 return NOTIFY_DONE; 592 } 593 594 static enum usb_role ci_usb_role_switch_get(struct usb_role_switch *sw) 595 { 596 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw); 597 enum usb_role role; 598 unsigned long flags; 599 600 spin_lock_irqsave(&ci->lock, flags); 601 role = ci_role_to_usb_role(ci); 602 spin_unlock_irqrestore(&ci->lock, flags); 603 604 return role; 605 } 606 607 static int ci_usb_role_switch_set(struct usb_role_switch *sw, 608 enum usb_role role) 609 { 610 struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw); 611 struct ci_hdrc_cable *cable; 612 613 if (role == USB_ROLE_HOST) { 614 cable = &ci->platdata->id_extcon; 615 cable->changed = true; 616 cable->connected = true; 617 cable = &ci->platdata->vbus_extcon; 618 cable->changed = true; 619 cable->connected = false; 620 } else if (role == USB_ROLE_DEVICE) { 621 cable = &ci->platdata->id_extcon; 622 cable->changed = true; 623 cable->connected = false; 624 cable = &ci->platdata->vbus_extcon; 625 cable->changed = true; 626 cable->connected = true; 627 } else { 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 = false; 634 } 635 636 ci_irq(ci); 637 return 0; 638 } 639 640 static enum ci_role ci_get_role(struct ci_hdrc *ci) 641 { 642 enum ci_role role; 643 644 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) { 645 if (ci->is_otg) { 646 role = ci_otg_role(ci); 647 hw_write_otgsc(ci, OTGSC_IDIE, OTGSC_IDIE); 648 } else { 649 /* 650 * If the controller is not OTG capable, but support 651 * role switch, the defalt role is gadget, and the 652 * user can switch it through debugfs. 653 */ 654 role = CI_ROLE_GADGET; 655 } 656 } else { 657 role = ci->roles[CI_ROLE_HOST] ? CI_ROLE_HOST 658 : CI_ROLE_GADGET; 659 } 660 661 return role; 662 } 663 664 static struct usb_role_switch_desc ci_role_switch = { 665 .set = ci_usb_role_switch_set, 666 .get = ci_usb_role_switch_get, 667 .allow_userspace_control = true, 668 }; 669 670 static int ci_get_platdata(struct device *dev, 671 struct ci_hdrc_platform_data *platdata) 672 { 673 struct extcon_dev *ext_vbus, *ext_id; 674 struct ci_hdrc_cable *cable; 675 int ret; 676 677 if (!platdata->phy_mode) 678 platdata->phy_mode = of_usb_get_phy_mode(dev->of_node); 679 680 if (!platdata->dr_mode) 681 platdata->dr_mode = usb_get_dr_mode(dev); 682 683 if (platdata->dr_mode == USB_DR_MODE_UNKNOWN) 684 platdata->dr_mode = USB_DR_MODE_OTG; 685 686 if (platdata->dr_mode != USB_DR_MODE_PERIPHERAL) { 687 /* Get the vbus regulator */ 688 platdata->reg_vbus = devm_regulator_get_optional(dev, "vbus"); 689 if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) { 690 return -EPROBE_DEFER; 691 } else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) { 692 /* no vbus regulator is needed */ 693 platdata->reg_vbus = NULL; 694 } else if (IS_ERR(platdata->reg_vbus)) { 695 dev_err(dev, "Getting regulator error: %ld\n", 696 PTR_ERR(platdata->reg_vbus)); 697 return PTR_ERR(platdata->reg_vbus); 698 } 699 /* Get TPL support */ 700 if (!platdata->tpl_support) 701 platdata->tpl_support = 702 of_usb_host_tpl_support(dev->of_node); 703 } 704 705 if (platdata->dr_mode == USB_DR_MODE_OTG) { 706 /* We can support HNP and SRP of OTG 2.0 */ 707 platdata->ci_otg_caps.otg_rev = 0x0200; 708 platdata->ci_otg_caps.hnp_support = true; 709 platdata->ci_otg_caps.srp_support = true; 710 711 /* Update otg capabilities by DT properties */ 712 ret = of_usb_update_otg_caps(dev->of_node, 713 &platdata->ci_otg_caps); 714 if (ret) 715 return ret; 716 } 717 718 if (usb_get_maximum_speed(dev) == USB_SPEED_FULL) 719 platdata->flags |= CI_HDRC_FORCE_FULLSPEED; 720 721 of_property_read_u32(dev->of_node, "phy-clkgate-delay-us", 722 &platdata->phy_clkgate_delay_us); 723 724 platdata->itc_setting = 1; 725 726 of_property_read_u32(dev->of_node, "itc-setting", 727 &platdata->itc_setting); 728 729 ret = of_property_read_u32(dev->of_node, "ahb-burst-config", 730 &platdata->ahb_burst_config); 731 if (!ret) { 732 platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST; 733 } else if (ret != -EINVAL) { 734 dev_err(dev, "failed to get ahb-burst-config\n"); 735 return ret; 736 } 737 738 ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword", 739 &platdata->tx_burst_size); 740 if (!ret) { 741 platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST; 742 } else if (ret != -EINVAL) { 743 dev_err(dev, "failed to get tx-burst-size-dword\n"); 744 return ret; 745 } 746 747 ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword", 748 &platdata->rx_burst_size); 749 if (!ret) { 750 platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST; 751 } else if (ret != -EINVAL) { 752 dev_err(dev, "failed to get rx-burst-size-dword\n"); 753 return ret; 754 } 755 756 if (of_find_property(dev->of_node, "non-zero-ttctrl-ttha", NULL)) 757 platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA; 758 759 ext_id = ERR_PTR(-ENODEV); 760 ext_vbus = ERR_PTR(-ENODEV); 761 if (of_property_read_bool(dev->of_node, "extcon")) { 762 /* Each one of them is not mandatory */ 763 ext_vbus = extcon_get_edev_by_phandle(dev, 0); 764 if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV) 765 return PTR_ERR(ext_vbus); 766 767 ext_id = extcon_get_edev_by_phandle(dev, 1); 768 if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV) 769 return PTR_ERR(ext_id); 770 } 771 772 cable = &platdata->vbus_extcon; 773 cable->nb.notifier_call = ci_cable_notifier; 774 cable->edev = ext_vbus; 775 776 if (!IS_ERR(ext_vbus)) { 777 ret = extcon_get_state(cable->edev, EXTCON_USB); 778 if (ret) 779 cable->connected = true; 780 else 781 cable->connected = false; 782 } 783 784 cable = &platdata->id_extcon; 785 cable->nb.notifier_call = ci_cable_notifier; 786 cable->edev = ext_id; 787 788 if (!IS_ERR(ext_id)) { 789 ret = extcon_get_state(cable->edev, EXTCON_USB_HOST); 790 if (ret) 791 cable->connected = true; 792 else 793 cable->connected = false; 794 } 795 796 if (device_property_read_bool(dev, "usb-role-switch")) 797 ci_role_switch.fwnode = dev->fwnode; 798 799 platdata->pctl = devm_pinctrl_get(dev); 800 if (!IS_ERR(platdata->pctl)) { 801 struct pinctrl_state *p; 802 803 p = pinctrl_lookup_state(platdata->pctl, "default"); 804 if (!IS_ERR(p)) 805 platdata->pins_default = p; 806 807 p = pinctrl_lookup_state(platdata->pctl, "host"); 808 if (!IS_ERR(p)) 809 platdata->pins_host = p; 810 811 p = pinctrl_lookup_state(platdata->pctl, "device"); 812 if (!IS_ERR(p)) 813 platdata->pins_device = p; 814 } 815 816 if (!platdata->enter_lpm) 817 platdata->enter_lpm = ci_hdrc_enter_lpm_common; 818 819 return 0; 820 } 821 822 static int ci_extcon_register(struct ci_hdrc *ci) 823 { 824 struct ci_hdrc_cable *id, *vbus; 825 int ret; 826 827 id = &ci->platdata->id_extcon; 828 id->ci = ci; 829 if (!IS_ERR_OR_NULL(id->edev)) { 830 ret = devm_extcon_register_notifier(ci->dev, id->edev, 831 EXTCON_USB_HOST, &id->nb); 832 if (ret < 0) { 833 dev_err(ci->dev, "register ID failed\n"); 834 return ret; 835 } 836 } 837 838 vbus = &ci->platdata->vbus_extcon; 839 vbus->ci = ci; 840 if (!IS_ERR_OR_NULL(vbus->edev)) { 841 ret = devm_extcon_register_notifier(ci->dev, vbus->edev, 842 EXTCON_USB, &vbus->nb); 843 if (ret < 0) { 844 dev_err(ci->dev, "register VBUS failed\n"); 845 return ret; 846 } 847 } 848 849 return 0; 850 } 851 852 static DEFINE_IDA(ci_ida); 853 854 struct platform_device *ci_hdrc_add_device(struct device *dev, 855 struct resource *res, int nres, 856 struct ci_hdrc_platform_data *platdata) 857 { 858 struct platform_device *pdev; 859 int id, ret; 860 861 ret = ci_get_platdata(dev, platdata); 862 if (ret) 863 return ERR_PTR(ret); 864 865 id = ida_simple_get(&ci_ida, 0, 0, GFP_KERNEL); 866 if (id < 0) 867 return ERR_PTR(id); 868 869 pdev = platform_device_alloc("ci_hdrc", id); 870 if (!pdev) { 871 ret = -ENOMEM; 872 goto put_id; 873 } 874 875 pdev->dev.parent = dev; 876 device_set_of_node_from_dev(&pdev->dev, dev); 877 878 ret = platform_device_add_resources(pdev, res, nres); 879 if (ret) 880 goto err; 881 882 ret = platform_device_add_data(pdev, platdata, sizeof(*platdata)); 883 if (ret) 884 goto err; 885 886 ret = platform_device_add(pdev); 887 if (ret) 888 goto err; 889 890 return pdev; 891 892 err: 893 platform_device_put(pdev); 894 put_id: 895 ida_simple_remove(&ci_ida, id); 896 return ERR_PTR(ret); 897 } 898 EXPORT_SYMBOL_GPL(ci_hdrc_add_device); 899 900 void ci_hdrc_remove_device(struct platform_device *pdev) 901 { 902 int id = pdev->id; 903 platform_device_unregister(pdev); 904 ida_simple_remove(&ci_ida, id); 905 } 906 EXPORT_SYMBOL_GPL(ci_hdrc_remove_device); 907 908 /** 909 * ci_hdrc_query_available_role: get runtime available operation mode 910 * 911 * The glue layer can get current operation mode (host/peripheral/otg) 912 * This function should be called after ci core device has created. 913 * 914 * @pdev: the platform device of ci core. 915 * 916 * Return runtime usb_dr_mode. 917 */ 918 enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev) 919 { 920 struct ci_hdrc *ci = platform_get_drvdata(pdev); 921 922 if (!ci) 923 return USB_DR_MODE_UNKNOWN; 924 if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) 925 return USB_DR_MODE_OTG; 926 else if (ci->roles[CI_ROLE_HOST]) 927 return USB_DR_MODE_HOST; 928 else if (ci->roles[CI_ROLE_GADGET]) 929 return USB_DR_MODE_PERIPHERAL; 930 else 931 return USB_DR_MODE_UNKNOWN; 932 } 933 EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role); 934 935 static inline void ci_role_destroy(struct ci_hdrc *ci) 936 { 937 ci_hdrc_gadget_destroy(ci); 938 ci_hdrc_host_destroy(ci); 939 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) 940 ci_hdrc_otg_destroy(ci); 941 } 942 943 static void ci_get_otg_capable(struct ci_hdrc *ci) 944 { 945 if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG) 946 ci->is_otg = false; 947 else 948 ci->is_otg = (hw_read(ci, CAP_DCCPARAMS, 949 DCCPARAMS_DC | DCCPARAMS_HC) 950 == (DCCPARAMS_DC | DCCPARAMS_HC)); 951 if (ci->is_otg) { 952 dev_dbg(ci->dev, "It is OTG capable controller\n"); 953 /* Disable and clear all OTG irq */ 954 hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS, 955 OTGSC_INT_STATUS_BITS); 956 } 957 } 958 959 static ssize_t role_show(struct device *dev, struct device_attribute *attr, 960 char *buf) 961 { 962 struct ci_hdrc *ci = dev_get_drvdata(dev); 963 964 if (ci->role != CI_ROLE_END) 965 return sprintf(buf, "%s\n", ci_role(ci)->name); 966 967 return 0; 968 } 969 970 static ssize_t role_store(struct device *dev, 971 struct device_attribute *attr, const char *buf, size_t n) 972 { 973 struct ci_hdrc *ci = dev_get_drvdata(dev); 974 enum ci_role role; 975 int ret; 976 977 if (!(ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])) { 978 dev_warn(dev, "Current configuration is not dual-role, quit\n"); 979 return -EPERM; 980 } 981 982 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) 983 if (!strncmp(buf, ci->roles[role]->name, 984 strlen(ci->roles[role]->name))) 985 break; 986 987 if (role == CI_ROLE_END || role == ci->role) 988 return -EINVAL; 989 990 pm_runtime_get_sync(dev); 991 disable_irq(ci->irq); 992 ci_role_stop(ci); 993 ret = ci_role_start(ci, role); 994 if (!ret && ci->role == CI_ROLE_GADGET) 995 ci_handle_vbus_change(ci); 996 enable_irq(ci->irq); 997 pm_runtime_put_sync(dev); 998 999 return (ret == 0) ? n : ret; 1000 } 1001 static DEVICE_ATTR_RW(role); 1002 1003 static struct attribute *ci_attrs[] = { 1004 &dev_attr_role.attr, 1005 NULL, 1006 }; 1007 ATTRIBUTE_GROUPS(ci); 1008 1009 static int ci_hdrc_probe(struct platform_device *pdev) 1010 { 1011 struct device *dev = &pdev->dev; 1012 struct ci_hdrc *ci; 1013 struct resource *res; 1014 void __iomem *base; 1015 int ret; 1016 enum usb_dr_mode dr_mode; 1017 1018 if (!dev_get_platdata(dev)) { 1019 dev_err(dev, "platform data missing\n"); 1020 return -ENODEV; 1021 } 1022 1023 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1024 base = devm_ioremap_resource(dev, res); 1025 if (IS_ERR(base)) 1026 return PTR_ERR(base); 1027 1028 ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL); 1029 if (!ci) 1030 return -ENOMEM; 1031 1032 spin_lock_init(&ci->lock); 1033 ci->dev = dev; 1034 ci->platdata = dev_get_platdata(dev); 1035 ci->imx28_write_fix = !!(ci->platdata->flags & 1036 CI_HDRC_IMX28_WRITE_FIX); 1037 ci->supports_runtime_pm = !!(ci->platdata->flags & 1038 CI_HDRC_SUPPORTS_RUNTIME_PM); 1039 platform_set_drvdata(pdev, ci); 1040 1041 ret = hw_device_init(ci, base); 1042 if (ret < 0) { 1043 dev_err(dev, "can't initialize hardware\n"); 1044 return -ENODEV; 1045 } 1046 1047 ret = ci_ulpi_init(ci); 1048 if (ret) 1049 return ret; 1050 1051 if (ci->platdata->phy) { 1052 ci->phy = ci->platdata->phy; 1053 } else if (ci->platdata->usb_phy) { 1054 ci->usb_phy = ci->platdata->usb_phy; 1055 } else { 1056 /* Look for a generic PHY first */ 1057 ci->phy = devm_phy_get(dev->parent, "usb-phy"); 1058 1059 if (PTR_ERR(ci->phy) == -EPROBE_DEFER) { 1060 ret = -EPROBE_DEFER; 1061 goto ulpi_exit; 1062 } else if (IS_ERR(ci->phy)) { 1063 ci->phy = NULL; 1064 } 1065 1066 /* Look for a legacy USB PHY from device-tree next */ 1067 if (!ci->phy) { 1068 ci->usb_phy = devm_usb_get_phy_by_phandle(dev->parent, 1069 "phys", 0); 1070 1071 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) { 1072 ret = -EPROBE_DEFER; 1073 goto ulpi_exit; 1074 } else if (IS_ERR(ci->usb_phy)) { 1075 ci->usb_phy = NULL; 1076 } 1077 } 1078 1079 /* Look for any registered legacy USB PHY as last resort */ 1080 if (!ci->phy && !ci->usb_phy) { 1081 ci->usb_phy = devm_usb_get_phy(dev->parent, 1082 USB_PHY_TYPE_USB2); 1083 1084 if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) { 1085 ret = -EPROBE_DEFER; 1086 goto ulpi_exit; 1087 } else if (IS_ERR(ci->usb_phy)) { 1088 ci->usb_phy = NULL; 1089 } 1090 } 1091 1092 /* No USB PHY was found in the end */ 1093 if (!ci->phy && !ci->usb_phy) { 1094 ret = -ENXIO; 1095 goto ulpi_exit; 1096 } 1097 } 1098 1099 ret = ci_usb_phy_init(ci); 1100 if (ret) { 1101 dev_err(dev, "unable to init phy: %d\n", ret); 1102 return ret; 1103 } 1104 1105 ci->hw_bank.phys = res->start; 1106 1107 ci->irq = platform_get_irq(pdev, 0); 1108 if (ci->irq < 0) { 1109 ret = ci->irq; 1110 goto deinit_phy; 1111 } 1112 1113 ci_get_otg_capable(ci); 1114 1115 dr_mode = ci->platdata->dr_mode; 1116 /* initialize role(s) before the interrupt is requested */ 1117 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { 1118 ret = ci_hdrc_host_init(ci); 1119 if (ret) { 1120 if (ret == -ENXIO) 1121 dev_info(dev, "doesn't support host\n"); 1122 else 1123 goto deinit_phy; 1124 } 1125 } 1126 1127 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) { 1128 ret = ci_hdrc_gadget_init(ci); 1129 if (ret) { 1130 if (ret == -ENXIO) 1131 dev_info(dev, "doesn't support gadget\n"); 1132 else 1133 goto deinit_host; 1134 } 1135 } 1136 1137 if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) { 1138 dev_err(dev, "no supported roles\n"); 1139 ret = -ENODEV; 1140 goto deinit_gadget; 1141 } 1142 1143 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) { 1144 ret = ci_hdrc_otg_init(ci); 1145 if (ret) { 1146 dev_err(dev, "init otg fails, ret = %d\n", ret); 1147 goto deinit_gadget; 1148 } 1149 } 1150 1151 if (ci_role_switch.fwnode) { 1152 ci_role_switch.driver_data = ci; 1153 ci->role_switch = usb_role_switch_register(dev, 1154 &ci_role_switch); 1155 if (IS_ERR(ci->role_switch)) { 1156 ret = PTR_ERR(ci->role_switch); 1157 goto deinit_otg; 1158 } 1159 } 1160 1161 ci->role = ci_get_role(ci); 1162 if (!ci_otg_is_fsm_mode(ci)) { 1163 /* only update vbus status for peripheral */ 1164 if (ci->role == CI_ROLE_GADGET) { 1165 /* Pull down DP for possible charger detection */ 1166 hw_write(ci, OP_USBCMD, USBCMD_RS, 0); 1167 ci_handle_vbus_change(ci); 1168 } 1169 1170 ret = ci_role_start(ci, ci->role); 1171 if (ret) { 1172 dev_err(dev, "can't start %s role\n", 1173 ci_role(ci)->name); 1174 goto stop; 1175 } 1176 } 1177 1178 ret = devm_request_irq(dev, ci->irq, ci_irq_handler, IRQF_SHARED, 1179 ci->platdata->name, ci); 1180 if (ret) 1181 goto stop; 1182 1183 ret = ci_extcon_register(ci); 1184 if (ret) 1185 goto stop; 1186 1187 if (ci->supports_runtime_pm) { 1188 pm_runtime_set_active(&pdev->dev); 1189 pm_runtime_enable(&pdev->dev); 1190 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); 1191 pm_runtime_mark_last_busy(ci->dev); 1192 pm_runtime_use_autosuspend(&pdev->dev); 1193 } 1194 1195 if (ci_otg_is_fsm_mode(ci)) 1196 ci_hdrc_otg_fsm_start(ci); 1197 1198 device_set_wakeup_capable(&pdev->dev, true); 1199 dbg_create_files(ci); 1200 1201 return 0; 1202 1203 stop: 1204 if (ci->role_switch) 1205 usb_role_switch_unregister(ci->role_switch); 1206 deinit_otg: 1207 if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) 1208 ci_hdrc_otg_destroy(ci); 1209 deinit_gadget: 1210 ci_hdrc_gadget_destroy(ci); 1211 deinit_host: 1212 ci_hdrc_host_destroy(ci); 1213 deinit_phy: 1214 ci_usb_phy_exit(ci); 1215 ulpi_exit: 1216 ci_ulpi_exit(ci); 1217 1218 return ret; 1219 } 1220 1221 static int ci_hdrc_remove(struct platform_device *pdev) 1222 { 1223 struct ci_hdrc *ci = platform_get_drvdata(pdev); 1224 1225 if (ci->role_switch) 1226 usb_role_switch_unregister(ci->role_switch); 1227 1228 if (ci->supports_runtime_pm) { 1229 pm_runtime_get_sync(&pdev->dev); 1230 pm_runtime_disable(&pdev->dev); 1231 pm_runtime_put_noidle(&pdev->dev); 1232 } 1233 1234 dbg_remove_files(ci); 1235 ci_role_destroy(ci); 1236 ci_hdrc_enter_lpm(ci, true); 1237 ci_usb_phy_exit(ci); 1238 ci_ulpi_exit(ci); 1239 1240 return 0; 1241 } 1242 1243 #ifdef CONFIG_PM 1244 /* Prepare wakeup by SRP before suspend */ 1245 static void ci_otg_fsm_suspend_for_srp(struct ci_hdrc *ci) 1246 { 1247 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) && 1248 !hw_read_otgsc(ci, OTGSC_ID)) { 1249 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP, 1250 PORTSC_PP); 1251 hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_WKCN, 1252 PORTSC_WKCN); 1253 } 1254 } 1255 1256 /* Handle SRP when wakeup by data pulse */ 1257 static void ci_otg_fsm_wakeup_by_srp(struct ci_hdrc *ci) 1258 { 1259 if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) && 1260 (ci->fsm.a_bus_drop == 1) && (ci->fsm.a_bus_req == 0)) { 1261 if (!hw_read_otgsc(ci, OTGSC_ID)) { 1262 ci->fsm.a_srp_det = 1; 1263 ci->fsm.a_bus_drop = 0; 1264 } else { 1265 ci->fsm.id = 1; 1266 } 1267 ci_otg_queue_work(ci); 1268 } 1269 } 1270 1271 static void ci_controller_suspend(struct ci_hdrc *ci) 1272 { 1273 disable_irq(ci->irq); 1274 ci_hdrc_enter_lpm(ci, true); 1275 if (ci->platdata->phy_clkgate_delay_us) 1276 usleep_range(ci->platdata->phy_clkgate_delay_us, 1277 ci->platdata->phy_clkgate_delay_us + 50); 1278 usb_phy_set_suspend(ci->usb_phy, 1); 1279 ci->in_lpm = true; 1280 enable_irq(ci->irq); 1281 } 1282 1283 /* 1284 * Handle the wakeup interrupt triggered by extcon connector 1285 * We need to call ci_irq again for extcon since the first 1286 * interrupt (wakeup int) only let the controller be out of 1287 * low power mode, but not handle any interrupts. 1288 */ 1289 static void ci_extcon_wakeup_int(struct ci_hdrc *ci) 1290 { 1291 struct ci_hdrc_cable *cable_id, *cable_vbus; 1292 u32 otgsc = hw_read_otgsc(ci, ~0); 1293 1294 cable_id = &ci->platdata->id_extcon; 1295 cable_vbus = &ci->platdata->vbus_extcon; 1296 1297 if ((!IS_ERR(cable_id->edev) || ci->role_switch) 1298 && ci->is_otg && 1299 (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) 1300 ci_irq(ci); 1301 1302 if ((!IS_ERR(cable_vbus->edev) || ci->role_switch) 1303 && ci->is_otg && 1304 (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) 1305 ci_irq(ci); 1306 } 1307 1308 static int ci_controller_resume(struct device *dev) 1309 { 1310 struct ci_hdrc *ci = dev_get_drvdata(dev); 1311 int ret; 1312 1313 dev_dbg(dev, "at %s\n", __func__); 1314 1315 if (!ci->in_lpm) { 1316 WARN_ON(1); 1317 return 0; 1318 } 1319 1320 ci_hdrc_enter_lpm(ci, false); 1321 1322 ret = ci_ulpi_resume(ci); 1323 if (ret) 1324 return ret; 1325 1326 if (ci->usb_phy) { 1327 usb_phy_set_suspend(ci->usb_phy, 0); 1328 usb_phy_set_wakeup(ci->usb_phy, false); 1329 hw_wait_phy_stable(); 1330 } 1331 1332 ci->in_lpm = false; 1333 if (ci->wakeup_int) { 1334 ci->wakeup_int = false; 1335 pm_runtime_mark_last_busy(ci->dev); 1336 pm_runtime_put_autosuspend(ci->dev); 1337 enable_irq(ci->irq); 1338 if (ci_otg_is_fsm_mode(ci)) 1339 ci_otg_fsm_wakeup_by_srp(ci); 1340 ci_extcon_wakeup_int(ci); 1341 } 1342 1343 return 0; 1344 } 1345 1346 #ifdef CONFIG_PM_SLEEP 1347 static int ci_suspend(struct device *dev) 1348 { 1349 struct ci_hdrc *ci = dev_get_drvdata(dev); 1350 1351 if (ci->wq) 1352 flush_workqueue(ci->wq); 1353 /* 1354 * Controller needs to be active during suspend, otherwise the core 1355 * may run resume when the parent is at suspend if other driver's 1356 * suspend fails, it occurs before parent's suspend has not started, 1357 * but the core suspend has finished. 1358 */ 1359 if (ci->in_lpm) 1360 pm_runtime_resume(dev); 1361 1362 if (ci->in_lpm) { 1363 WARN_ON(1); 1364 return 0; 1365 } 1366 1367 /* Extra routine per role before system suspend */ 1368 if (ci->role != CI_ROLE_END && ci_role(ci)->suspend) 1369 ci_role(ci)->suspend(ci); 1370 1371 if (device_may_wakeup(dev)) { 1372 if (ci_otg_is_fsm_mode(ci)) 1373 ci_otg_fsm_suspend_for_srp(ci); 1374 1375 usb_phy_set_wakeup(ci->usb_phy, true); 1376 enable_irq_wake(ci->irq); 1377 } 1378 1379 ci_controller_suspend(ci); 1380 1381 return 0; 1382 } 1383 1384 static void ci_handle_power_lost(struct ci_hdrc *ci) 1385 { 1386 enum ci_role role; 1387 1388 disable_irq_nosync(ci->irq); 1389 if (!ci_otg_is_fsm_mode(ci)) { 1390 role = ci_get_role(ci); 1391 1392 if (ci->role != role) { 1393 ci_handle_id_switch(ci); 1394 } else if (role == CI_ROLE_GADGET) { 1395 if (ci->is_otg && hw_read_otgsc(ci, OTGSC_BSV)) 1396 usb_gadget_vbus_connect(&ci->gadget); 1397 } 1398 } 1399 1400 enable_irq(ci->irq); 1401 } 1402 1403 static int ci_resume(struct device *dev) 1404 { 1405 struct ci_hdrc *ci = dev_get_drvdata(dev); 1406 bool power_lost; 1407 int ret; 1408 1409 /* Since ASYNCLISTADDR (host mode) and ENDPTLISTADDR (device 1410 * mode) share the same register address. We can check if 1411 * controller resume from power lost based on this address 1412 * due to this register will be reset after power lost. 1413 */ 1414 power_lost = !hw_read(ci, OP_ENDPTLISTADDR, ~0); 1415 1416 if (device_may_wakeup(dev)) 1417 disable_irq_wake(ci->irq); 1418 1419 ret = ci_controller_resume(dev); 1420 if (ret) 1421 return ret; 1422 1423 if (power_lost) { 1424 /* shutdown and re-init for phy */ 1425 ci_usb_phy_exit(ci); 1426 ci_usb_phy_init(ci); 1427 } 1428 1429 /* Extra routine per role after system resume */ 1430 if (ci->role != CI_ROLE_END && ci_role(ci)->resume) 1431 ci_role(ci)->resume(ci, power_lost); 1432 1433 if (power_lost) 1434 ci_handle_power_lost(ci); 1435 1436 if (ci->supports_runtime_pm) { 1437 pm_runtime_disable(dev); 1438 pm_runtime_set_active(dev); 1439 pm_runtime_enable(dev); 1440 } 1441 1442 return ret; 1443 } 1444 #endif /* CONFIG_PM_SLEEP */ 1445 1446 static int ci_runtime_suspend(struct device *dev) 1447 { 1448 struct ci_hdrc *ci = dev_get_drvdata(dev); 1449 1450 dev_dbg(dev, "at %s\n", __func__); 1451 1452 if (ci->in_lpm) { 1453 WARN_ON(1); 1454 return 0; 1455 } 1456 1457 if (ci_otg_is_fsm_mode(ci)) 1458 ci_otg_fsm_suspend_for_srp(ci); 1459 1460 usb_phy_set_wakeup(ci->usb_phy, true); 1461 ci_controller_suspend(ci); 1462 1463 return 0; 1464 } 1465 1466 static int ci_runtime_resume(struct device *dev) 1467 { 1468 return ci_controller_resume(dev); 1469 } 1470 1471 #endif /* CONFIG_PM */ 1472 static const struct dev_pm_ops ci_pm_ops = { 1473 SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume) 1474 SET_RUNTIME_PM_OPS(ci_runtime_suspend, ci_runtime_resume, NULL) 1475 }; 1476 1477 static struct platform_driver ci_hdrc_driver = { 1478 .probe = ci_hdrc_probe, 1479 .remove = ci_hdrc_remove, 1480 .driver = { 1481 .name = "ci_hdrc", 1482 .pm = &ci_pm_ops, 1483 .dev_groups = ci_groups, 1484 }, 1485 }; 1486 1487 static int __init ci_hdrc_platform_register(void) 1488 { 1489 ci_hdrc_host_driver_init(); 1490 return platform_driver_register(&ci_hdrc_driver); 1491 } 1492 module_init(ci_hdrc_platform_register); 1493 1494 static void __exit ci_hdrc_platform_unregister(void) 1495 { 1496 platform_driver_unregister(&ci_hdrc_driver); 1497 } 1498 module_exit(ci_hdrc_platform_unregister); 1499 1500 MODULE_ALIAS("platform:ci_hdrc"); 1501 MODULE_LICENSE("GPL v2"); 1502 MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>"); 1503 MODULE_DESCRIPTION("ChipIdea HDRC Driver"); 1504