1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Motorola Mapphone MDM6600 modem GPIO controlled USB PHY driver 4 * Copyright (C) 2018 Tony Lindgren <tony@atomide.com> 5 */ 6 7 #include <linux/delay.h> 8 #include <linux/err.h> 9 #include <linux/io.h> 10 #include <linux/interrupt.h> 11 #include <linux/module.h> 12 #include <linux/of.h> 13 #include <linux/platform_device.h> 14 #include <linux/slab.h> 15 16 #include <linux/gpio/consumer.h> 17 #include <linux/of_platform.h> 18 #include <linux/phy/phy.h> 19 #include <linux/pinctrl/consumer.h> 20 21 #define PHY_MDM6600_PHY_DELAY_MS 4000 /* PHY enable 2.2s to 3.5s */ 22 #define PHY_MDM6600_ENABLED_DELAY_MS 8000 /* 8s more total for MDM6600 */ 23 #define PHY_MDM6600_WAKE_KICK_MS 600 /* time on after GPIO toggle */ 24 #define MDM6600_MODEM_IDLE_DELAY_MS 1000 /* modem after USB suspend */ 25 #define MDM6600_MODEM_WAKE_DELAY_MS 200 /* modem response after idle */ 26 27 enum phy_mdm6600_ctrl_lines { 28 PHY_MDM6600_ENABLE, /* USB PHY enable */ 29 PHY_MDM6600_POWER, /* Device power */ 30 PHY_MDM6600_RESET, /* Device reset */ 31 PHY_MDM6600_NR_CTRL_LINES, 32 }; 33 34 enum phy_mdm6600_bootmode_lines { 35 PHY_MDM6600_MODE0, /* out USB mode0 and OOB wake */ 36 PHY_MDM6600_MODE1, /* out USB mode1, in OOB wake */ 37 PHY_MDM6600_NR_MODE_LINES, 38 }; 39 40 enum phy_mdm6600_cmd_lines { 41 PHY_MDM6600_CMD0, 42 PHY_MDM6600_CMD1, 43 PHY_MDM6600_CMD2, 44 PHY_MDM6600_NR_CMD_LINES, 45 }; 46 47 enum phy_mdm6600_status_lines { 48 PHY_MDM6600_STATUS0, 49 PHY_MDM6600_STATUS1, 50 PHY_MDM6600_STATUS2, 51 PHY_MDM6600_NR_STATUS_LINES, 52 }; 53 54 /* 55 * MDM6600 command codes. These are based on Motorola Mapphone Linux 56 * kernel tree. 57 */ 58 enum phy_mdm6600_cmd { 59 PHY_MDM6600_CMD_BP_PANIC_ACK, 60 PHY_MDM6600_CMD_DATA_ONLY_BYPASS, /* Reroute USB to CPCAP PHY */ 61 PHY_MDM6600_CMD_FULL_BYPASS, /* Reroute USB to CPCAP PHY */ 62 PHY_MDM6600_CMD_NO_BYPASS, /* Request normal USB mode */ 63 PHY_MDM6600_CMD_BP_SHUTDOWN_REQ, /* Request device power off */ 64 PHY_MDM6600_CMD_BP_UNKNOWN_5, 65 PHY_MDM6600_CMD_BP_UNKNOWN_6, 66 PHY_MDM6600_CMD_UNDEFINED, 67 }; 68 69 /* 70 * MDM6600 status codes. These are based on Motorola Mapphone Linux 71 * kernel tree. 72 */ 73 enum phy_mdm6600_status { 74 PHY_MDM6600_STATUS_PANIC, /* Seems to be really off */ 75 PHY_MDM6600_STATUS_PANIC_BUSY_WAIT, 76 PHY_MDM6600_STATUS_QC_DLOAD, 77 PHY_MDM6600_STATUS_RAM_DOWNLOADER, /* MDM6600 USB flashing mode */ 78 PHY_MDM6600_STATUS_PHONE_CODE_AWAKE, /* MDM6600 normal USB mode */ 79 PHY_MDM6600_STATUS_PHONE_CODE_ASLEEP, 80 PHY_MDM6600_STATUS_SHUTDOWN_ACK, 81 PHY_MDM6600_STATUS_UNDEFINED, 82 }; 83 84 static const char * const 85 phy_mdm6600_status_name[] = { 86 "off", "busy", "qc_dl", "ram_dl", "awake", 87 "asleep", "shutdown", "undefined", 88 }; 89 90 struct phy_mdm6600 { 91 struct device *dev; 92 struct phy *generic_phy; 93 struct phy_provider *phy_provider; 94 struct gpio_desc *ctrl_gpios[PHY_MDM6600_NR_CTRL_LINES]; 95 struct gpio_descs *mode_gpios; 96 struct gpio_descs *status_gpios; 97 struct gpio_descs *cmd_gpios; 98 struct delayed_work bootup_work; 99 struct delayed_work status_work; 100 struct delayed_work modem_wake_work; 101 struct completion ack; 102 bool enabled; /* mdm6600 phy enabled */ 103 bool running; /* mdm6600 boot done */ 104 bool awake; /* mdm6600 respnds on n_gsm */ 105 int status; 106 }; 107 108 static int phy_mdm6600_init(struct phy *x) 109 { 110 struct phy_mdm6600 *ddata = phy_get_drvdata(x); 111 struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; 112 113 if (!ddata->enabled) 114 return -EPROBE_DEFER; 115 116 gpiod_set_value_cansleep(enable_gpio, 0); 117 118 return 0; 119 } 120 121 static int phy_mdm6600_power_on(struct phy *x) 122 { 123 struct phy_mdm6600 *ddata = phy_get_drvdata(x); 124 struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; 125 126 if (!ddata->enabled) 127 return -ENODEV; 128 129 gpiod_set_value_cansleep(enable_gpio, 1); 130 131 /* Allow aggressive PM for USB, it's only needed for n_gsm port */ 132 if (pm_runtime_enabled(&x->dev)) 133 phy_pm_runtime_put(x); 134 135 return 0; 136 } 137 138 static int phy_mdm6600_power_off(struct phy *x) 139 { 140 struct phy_mdm6600 *ddata = phy_get_drvdata(x); 141 struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; 142 int error; 143 144 if (!ddata->enabled) 145 return -ENODEV; 146 147 /* Paired with phy_pm_runtime_put() in phy_mdm6600_power_on() */ 148 if (pm_runtime_enabled(&x->dev)) { 149 error = phy_pm_runtime_get(x); 150 if (error < 0 && error != -EINPROGRESS) 151 dev_warn(ddata->dev, "%s: phy_pm_runtime_get: %i\n", 152 __func__, error); 153 } 154 155 gpiod_set_value_cansleep(enable_gpio, 0); 156 157 return 0; 158 } 159 160 static const struct phy_ops gpio_usb_ops = { 161 .init = phy_mdm6600_init, 162 .power_on = phy_mdm6600_power_on, 163 .power_off = phy_mdm6600_power_off, 164 .owner = THIS_MODULE, 165 }; 166 167 /** 168 * phy_mdm6600_cmd() - send a command request to mdm6600 169 * @ddata: device driver data 170 * @val: value of cmd to be set 171 * 172 * Configures the three command request GPIOs to the specified value. 173 */ 174 static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val) 175 { 176 DECLARE_BITMAP(values, PHY_MDM6600_NR_CMD_LINES); 177 178 values[0] = val; 179 180 gpiod_multi_set_value_cansleep(ddata->cmd_gpios, values); 181 } 182 183 /** 184 * phy_mdm6600_status() - read mdm6600 status lines 185 * @work: work structure 186 */ 187 static void phy_mdm6600_status(struct work_struct *work) 188 { 189 struct phy_mdm6600 *ddata; 190 struct device *dev; 191 DECLARE_BITMAP(values, PHY_MDM6600_NR_STATUS_LINES); 192 int error; 193 194 ddata = container_of(work, struct phy_mdm6600, status_work.work); 195 dev = ddata->dev; 196 197 error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES, 198 ddata->status_gpios->desc, 199 ddata->status_gpios->info, 200 values); 201 if (error) 202 return; 203 204 ddata->status = values[0] & ((1 << PHY_MDM6600_NR_STATUS_LINES) - 1); 205 206 dev_info(dev, "modem status: %i %s\n", 207 ddata->status, 208 phy_mdm6600_status_name[ddata->status]); 209 complete(&ddata->ack); 210 } 211 212 static irqreturn_t phy_mdm6600_irq_thread(int irq, void *data) 213 { 214 struct phy_mdm6600 *ddata = data; 215 216 schedule_delayed_work(&ddata->status_work, msecs_to_jiffies(10)); 217 218 return IRQ_HANDLED; 219 } 220 221 /** 222 * phy_mdm6600_wakeirq_thread - handle mode1 line OOB wake after booting 223 * @irq: interrupt 224 * @data: interrupt handler data 225 * 226 * GPIO mode1 is used initially as output to configure the USB boot 227 * mode for mdm6600. After booting it is used as input for OOB wake 228 * signal from mdm6600 to the SoC. Just use it for debug info only 229 * for now. 230 */ 231 static irqreturn_t phy_mdm6600_wakeirq_thread(int irq, void *data) 232 { 233 struct phy_mdm6600 *ddata = data; 234 struct gpio_desc *mode_gpio1; 235 int error, wakeup; 236 237 mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; 238 wakeup = gpiod_get_value(mode_gpio1); 239 if (!wakeup) 240 return IRQ_NONE; 241 242 dev_dbg(ddata->dev, "OOB wake on mode_gpio1: %i\n", wakeup); 243 error = pm_runtime_get_sync(ddata->dev); 244 if (error < 0) { 245 pm_runtime_put_noidle(ddata->dev); 246 247 return IRQ_NONE; 248 } 249 250 /* Just wake-up and kick the autosuspend timer */ 251 pm_runtime_mark_last_busy(ddata->dev); 252 pm_runtime_put_autosuspend(ddata->dev); 253 254 return IRQ_HANDLED; 255 } 256 257 /** 258 * phy_mdm6600_init_irq() - initialize mdm6600 status IRQ lines 259 * @ddata: device driver data 260 */ 261 static void phy_mdm6600_init_irq(struct phy_mdm6600 *ddata) 262 { 263 struct device *dev = ddata->dev; 264 int i, error, irq; 265 266 for (i = PHY_MDM6600_STATUS0; 267 i <= PHY_MDM6600_STATUS2; i++) { 268 struct gpio_desc *gpio = ddata->status_gpios->desc[i]; 269 270 irq = gpiod_to_irq(gpio); 271 if (irq <= 0) 272 continue; 273 274 error = devm_request_threaded_irq(dev, irq, NULL, 275 phy_mdm6600_irq_thread, 276 IRQF_TRIGGER_RISING | 277 IRQF_TRIGGER_FALLING | 278 IRQF_ONESHOT, 279 "mdm6600", 280 ddata); 281 if (error) 282 dev_warn(dev, "no modem status irq%i: %i\n", 283 irq, error); 284 } 285 } 286 287 struct phy_mdm6600_map { 288 const char *name; 289 int direction; 290 }; 291 292 static const struct phy_mdm6600_map 293 phy_mdm6600_ctrl_gpio_map[PHY_MDM6600_NR_CTRL_LINES] = { 294 { "enable", GPIOD_OUT_LOW, }, /* low = phy disabled */ 295 { "power", GPIOD_OUT_LOW, }, /* low = off */ 296 { "reset", GPIOD_OUT_HIGH, }, /* high = reset */ 297 }; 298 299 /** 300 * phy_mdm6600_init_lines() - initialize mdm6600 GPIO lines 301 * @ddata: device driver data 302 */ 303 static int phy_mdm6600_init_lines(struct phy_mdm6600 *ddata) 304 { 305 struct device *dev = ddata->dev; 306 int i; 307 308 /* MDM6600 control lines */ 309 for (i = 0; i < ARRAY_SIZE(phy_mdm6600_ctrl_gpio_map); i++) { 310 const struct phy_mdm6600_map *map = 311 &phy_mdm6600_ctrl_gpio_map[i]; 312 struct gpio_desc **gpio = &ddata->ctrl_gpios[i]; 313 314 *gpio = devm_gpiod_get(dev, map->name, map->direction); 315 if (IS_ERR(*gpio)) { 316 dev_info(dev, "gpio %s error %li\n", 317 map->name, PTR_ERR(*gpio)); 318 return PTR_ERR(*gpio); 319 } 320 } 321 322 /* MDM6600 USB start-up mode output lines */ 323 ddata->mode_gpios = devm_gpiod_get_array(dev, "motorola,mode", 324 GPIOD_OUT_LOW); 325 if (IS_ERR(ddata->mode_gpios)) 326 return PTR_ERR(ddata->mode_gpios); 327 328 if (ddata->mode_gpios->ndescs != PHY_MDM6600_NR_MODE_LINES) 329 return -EINVAL; 330 331 /* MDM6600 status input lines */ 332 ddata->status_gpios = devm_gpiod_get_array(dev, "motorola,status", 333 GPIOD_IN); 334 if (IS_ERR(ddata->status_gpios)) 335 return PTR_ERR(ddata->status_gpios); 336 337 if (ddata->status_gpios->ndescs != PHY_MDM6600_NR_STATUS_LINES) 338 return -EINVAL; 339 340 /* MDM6600 cmd output lines */ 341 ddata->cmd_gpios = devm_gpiod_get_array(dev, "motorola,cmd", 342 GPIOD_OUT_LOW); 343 if (IS_ERR(ddata->cmd_gpios)) 344 return PTR_ERR(ddata->cmd_gpios); 345 346 if (ddata->cmd_gpios->ndescs != PHY_MDM6600_NR_CMD_LINES) 347 return -EINVAL; 348 349 return 0; 350 } 351 352 /** 353 * phy_mdm6600_device_power_on() - power on mdm6600 device 354 * @ddata: device driver data 355 * 356 * To get the integrated USB phy in MDM6600 takes some hoops. We must ensure 357 * the shared USB bootmode GPIOs are configured, then request modem start-up, 358 * reset and power-up.. And then we need to recycle the shared USB bootmode 359 * GPIOs as they are also used for Out of Band (OOB) wake for the USB and 360 * TS 27.010 serial mux. 361 */ 362 static int phy_mdm6600_device_power_on(struct phy_mdm6600 *ddata) 363 { 364 struct gpio_desc *mode_gpio0, *mode_gpio1, *reset_gpio, *power_gpio; 365 int error = 0, wakeirq; 366 367 mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; 368 mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; 369 reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; 370 power_gpio = ddata->ctrl_gpios[PHY_MDM6600_POWER]; 371 372 /* 373 * Shared GPIOs must be low for normal USB mode. After booting 374 * they are used for OOB wake signaling. These can be also used 375 * to configure USB flashing mode later on based on a module 376 * parameter. 377 */ 378 gpiod_set_value_cansleep(mode_gpio0, 0); 379 gpiod_set_value_cansleep(mode_gpio1, 0); 380 381 /* Request start-up mode */ 382 phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_NO_BYPASS); 383 384 /* Request a reset first */ 385 gpiod_set_value_cansleep(reset_gpio, 0); 386 msleep(100); 387 388 /* Toggle power GPIO to request mdm6600 to start */ 389 gpiod_set_value_cansleep(power_gpio, 1); 390 msleep(100); 391 gpiod_set_value_cansleep(power_gpio, 0); 392 393 /* 394 * Looks like the USB PHY needs between 2.2 to 4 seconds. 395 * If we try to use it before that, we will get L3 errors 396 * from omap-usb-host trying to access the PHY. See also 397 * phy_mdm6600_init() for -EPROBE_DEFER. 398 */ 399 msleep(PHY_MDM6600_PHY_DELAY_MS); 400 ddata->enabled = true; 401 402 /* Booting up the rest of MDM6600 will take total about 8 seconds */ 403 dev_info(ddata->dev, "Waiting for power up request to complete..\n"); 404 if (wait_for_completion_timeout(&ddata->ack, 405 msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS))) { 406 if (ddata->status > PHY_MDM6600_STATUS_PANIC && 407 ddata->status < PHY_MDM6600_STATUS_SHUTDOWN_ACK) 408 dev_info(ddata->dev, "Powered up OK\n"); 409 } else { 410 ddata->enabled = false; 411 error = -ETIMEDOUT; 412 dev_err(ddata->dev, "Timed out powering up\n"); 413 } 414 415 /* Reconfigure mode1 GPIO as input for OOB wake */ 416 gpiod_direction_input(mode_gpio1); 417 418 wakeirq = gpiod_to_irq(mode_gpio1); 419 if (wakeirq <= 0) 420 return wakeirq; 421 422 error = devm_request_threaded_irq(ddata->dev, wakeirq, NULL, 423 phy_mdm6600_wakeirq_thread, 424 IRQF_TRIGGER_RISING | 425 IRQF_TRIGGER_FALLING | 426 IRQF_ONESHOT, 427 "mdm6600-wake", 428 ddata); 429 if (error) 430 dev_warn(ddata->dev, "no modem wakeirq irq%i: %i\n", 431 wakeirq, error); 432 433 ddata->running = true; 434 435 return error; 436 } 437 438 /** 439 * phy_mdm6600_device_power_off() - power off mdm6600 device 440 * @ddata: device driver data 441 */ 442 static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata) 443 { 444 struct gpio_desc *reset_gpio = 445 ddata->ctrl_gpios[PHY_MDM6600_RESET]; 446 int error; 447 448 ddata->enabled = false; 449 phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ); 450 msleep(100); 451 452 gpiod_set_value_cansleep(reset_gpio, 1); 453 454 dev_info(ddata->dev, "Waiting for power down request to complete.. "); 455 if (wait_for_completion_timeout(&ddata->ack, 456 msecs_to_jiffies(5000))) { 457 if (ddata->status == PHY_MDM6600_STATUS_PANIC) 458 dev_info(ddata->dev, "Powered down OK\n"); 459 } else { 460 dev_err(ddata->dev, "Timed out powering down\n"); 461 } 462 463 /* 464 * Keep reset gpio high with padconf internal pull-up resistor to 465 * prevent modem from waking up during deeper SoC idle states. The 466 * gpio bank lines can have glitches if not in the always-on wkup 467 * domain. 468 */ 469 error = pinctrl_pm_select_sleep_state(ddata->dev); 470 if (error) 471 dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", 472 __func__, error); 473 } 474 475 static void phy_mdm6600_deferred_power_on(struct work_struct *work) 476 { 477 struct phy_mdm6600 *ddata; 478 int error; 479 480 ddata = container_of(work, struct phy_mdm6600, bootup_work.work); 481 482 error = phy_mdm6600_device_power_on(ddata); 483 if (error) 484 dev_err(ddata->dev, "Device not functional\n"); 485 } 486 487 /* 488 * USB suspend puts mdm6600 into low power mode. For any n_gsm using apps, 489 * we need to keep the modem awake by kicking it's mode0 GPIO. This will 490 * keep the modem awake for about 1.2 seconds. When no n_gsm apps are using 491 * the modem, runtime PM auto mode can be enabled so modem can enter low 492 * power mode. 493 */ 494 static void phy_mdm6600_wake_modem(struct phy_mdm6600 *ddata) 495 { 496 struct gpio_desc *mode_gpio0; 497 498 mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; 499 gpiod_set_value_cansleep(mode_gpio0, 1); 500 usleep_range(5, 15); 501 gpiod_set_value_cansleep(mode_gpio0, 0); 502 if (ddata->awake) 503 usleep_range(5, 15); 504 else 505 msleep(MDM6600_MODEM_WAKE_DELAY_MS); 506 } 507 508 static void phy_mdm6600_modem_wake(struct work_struct *work) 509 { 510 struct phy_mdm6600 *ddata; 511 512 ddata = container_of(work, struct phy_mdm6600, modem_wake_work.work); 513 phy_mdm6600_wake_modem(ddata); 514 515 /* 516 * The modem does not always stay awake 1.2 seconds after toggling 517 * the wake GPIO, and sometimes it idles after about some 600 ms 518 * making writes time out. 519 */ 520 schedule_delayed_work(&ddata->modem_wake_work, 521 msecs_to_jiffies(PHY_MDM6600_WAKE_KICK_MS)); 522 } 523 524 static int __maybe_unused phy_mdm6600_runtime_suspend(struct device *dev) 525 { 526 struct phy_mdm6600 *ddata = dev_get_drvdata(dev); 527 528 cancel_delayed_work_sync(&ddata->modem_wake_work); 529 ddata->awake = false; 530 531 return 0; 532 } 533 534 static int __maybe_unused phy_mdm6600_runtime_resume(struct device *dev) 535 { 536 struct phy_mdm6600 *ddata = dev_get_drvdata(dev); 537 538 phy_mdm6600_modem_wake(&ddata->modem_wake_work.work); 539 ddata->awake = true; 540 541 return 0; 542 } 543 544 static const struct dev_pm_ops phy_mdm6600_pm_ops = { 545 SET_RUNTIME_PM_OPS(phy_mdm6600_runtime_suspend, 546 phy_mdm6600_runtime_resume, NULL) 547 }; 548 549 static const struct of_device_id phy_mdm6600_id_table[] = { 550 { .compatible = "motorola,mapphone-mdm6600", }, 551 {}, 552 }; 553 MODULE_DEVICE_TABLE(of, phy_mdm6600_id_table); 554 555 static int phy_mdm6600_probe(struct platform_device *pdev) 556 { 557 struct phy_mdm6600 *ddata; 558 int error; 559 560 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); 561 if (!ddata) 562 return -ENOMEM; 563 564 INIT_DELAYED_WORK(&ddata->bootup_work, 565 phy_mdm6600_deferred_power_on); 566 INIT_DELAYED_WORK(&ddata->status_work, phy_mdm6600_status); 567 INIT_DELAYED_WORK(&ddata->modem_wake_work, phy_mdm6600_modem_wake); 568 init_completion(&ddata->ack); 569 570 ddata->dev = &pdev->dev; 571 platform_set_drvdata(pdev, ddata); 572 573 error = phy_mdm6600_init_lines(ddata); 574 if (error) 575 return error; 576 577 phy_mdm6600_init_irq(ddata); 578 schedule_delayed_work(&ddata->bootup_work, 0); 579 580 /* 581 * See phy_mdm6600_device_power_on(). We should be able 582 * to remove this eventually when ohci-platform can deal 583 * with -EPROBE_DEFER. 584 */ 585 msleep(PHY_MDM6600_PHY_DELAY_MS + 500); 586 587 /* 588 * Enable PM runtime only after PHY has been powered up properly. 589 * It is currently only needed after USB suspends mdm6600 and n_gsm 590 * needs to access the device. We don't want to do this earlier as 591 * gpio mode0 pin doubles as mdm6600 wake-up gpio. 592 */ 593 pm_runtime_use_autosuspend(ddata->dev); 594 pm_runtime_set_autosuspend_delay(ddata->dev, 595 MDM6600_MODEM_IDLE_DELAY_MS); 596 pm_runtime_enable(ddata->dev); 597 error = pm_runtime_get_sync(ddata->dev); 598 if (error < 0) { 599 dev_warn(ddata->dev, "failed to wake modem: %i\n", error); 600 pm_runtime_put_noidle(ddata->dev); 601 goto cleanup; 602 } 603 604 ddata->generic_phy = devm_phy_create(ddata->dev, NULL, &gpio_usb_ops); 605 if (IS_ERR(ddata->generic_phy)) { 606 error = PTR_ERR(ddata->generic_phy); 607 goto idle; 608 } 609 610 phy_set_drvdata(ddata->generic_phy, ddata); 611 612 ddata->phy_provider = 613 devm_of_phy_provider_register(ddata->dev, 614 of_phy_simple_xlate); 615 if (IS_ERR(ddata->phy_provider)) 616 error = PTR_ERR(ddata->phy_provider); 617 618 idle: 619 pm_runtime_mark_last_busy(ddata->dev); 620 pm_runtime_put_autosuspend(ddata->dev); 621 622 cleanup: 623 if (error < 0) { 624 phy_mdm6600_device_power_off(ddata); 625 pm_runtime_disable(ddata->dev); 626 pm_runtime_dont_use_autosuspend(ddata->dev); 627 } 628 629 return error; 630 } 631 632 static void phy_mdm6600_remove(struct platform_device *pdev) 633 { 634 struct phy_mdm6600 *ddata = platform_get_drvdata(pdev); 635 struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; 636 637 pm_runtime_get_noresume(ddata->dev); 638 pm_runtime_dont_use_autosuspend(ddata->dev); 639 pm_runtime_put_sync(ddata->dev); 640 pm_runtime_disable(ddata->dev); 641 642 if (!ddata->running) 643 wait_for_completion_timeout(&ddata->ack, 644 msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS)); 645 646 gpiod_set_value_cansleep(reset_gpio, 1); 647 phy_mdm6600_device_power_off(ddata); 648 649 cancel_delayed_work_sync(&ddata->modem_wake_work); 650 cancel_delayed_work_sync(&ddata->bootup_work); 651 cancel_delayed_work_sync(&ddata->status_work); 652 } 653 654 static struct platform_driver phy_mdm6600_driver = { 655 .probe = phy_mdm6600_probe, 656 .remove = phy_mdm6600_remove, 657 .driver = { 658 .name = "phy-mapphone-mdm6600", 659 .pm = &phy_mdm6600_pm_ops, 660 .of_match_table = of_match_ptr(phy_mdm6600_id_table), 661 }, 662 }; 663 664 module_platform_driver(phy_mdm6600_driver); 665 666 MODULE_ALIAS("platform:gpio_usb"); 667 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); 668 MODULE_DESCRIPTION("mdm6600 gpio usb phy driver"); 669 MODULE_LICENSE("GPL v2"); 670