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 int error; 126 127 if (!ddata->enabled) 128 return -ENODEV; 129 130 error = pinctrl_pm_select_default_state(ddata->dev); 131 if (error) 132 dev_warn(ddata->dev, "%s: error with default_state: %i\n", 133 __func__, error); 134 135 gpiod_set_value_cansleep(enable_gpio, 1); 136 137 /* Allow aggressive PM for USB, it's only needed for n_gsm port */ 138 if (pm_runtime_enabled(&x->dev)) 139 phy_pm_runtime_put(x); 140 141 return 0; 142 } 143 144 static int phy_mdm6600_power_off(struct phy *x) 145 { 146 struct phy_mdm6600 *ddata = phy_get_drvdata(x); 147 struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; 148 int error; 149 150 if (!ddata->enabled) 151 return -ENODEV; 152 153 /* Paired with phy_pm_runtime_put() in phy_mdm6600_power_on() */ 154 if (pm_runtime_enabled(&x->dev)) { 155 error = phy_pm_runtime_get(x); 156 if (error < 0 && error != -EINPROGRESS) 157 dev_warn(ddata->dev, "%s: phy_pm_runtime_get: %i\n", 158 __func__, error); 159 } 160 161 gpiod_set_value_cansleep(enable_gpio, 0); 162 163 error = pinctrl_pm_select_sleep_state(ddata->dev); 164 if (error) 165 dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", 166 __func__, error); 167 168 return 0; 169 } 170 171 static const struct phy_ops gpio_usb_ops = { 172 .init = phy_mdm6600_init, 173 .power_on = phy_mdm6600_power_on, 174 .power_off = phy_mdm6600_power_off, 175 .owner = THIS_MODULE, 176 }; 177 178 /** 179 * phy_mdm6600_cmd() - send a command request to mdm6600 180 * @ddata: device driver data 181 * 182 * Configures the three command request GPIOs to the specified value. 183 */ 184 static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val) 185 { 186 DECLARE_BITMAP(values, PHY_MDM6600_NR_CMD_LINES); 187 188 values[0] = val; 189 190 gpiod_set_array_value_cansleep(PHY_MDM6600_NR_CMD_LINES, 191 ddata->cmd_gpios->desc, 192 ddata->cmd_gpios->info, values); 193 } 194 195 /** 196 * phy_mdm6600_status() - read mdm6600 status lines 197 * @ddata: device driver data 198 */ 199 static void phy_mdm6600_status(struct work_struct *work) 200 { 201 struct phy_mdm6600 *ddata; 202 struct device *dev; 203 DECLARE_BITMAP(values, PHY_MDM6600_NR_STATUS_LINES); 204 int error; 205 206 ddata = container_of(work, struct phy_mdm6600, status_work.work); 207 dev = ddata->dev; 208 209 error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES, 210 ddata->status_gpios->desc, 211 ddata->status_gpios->info, 212 values); 213 if (error) 214 return; 215 216 ddata->status = values[0] & ((1 << PHY_MDM6600_NR_STATUS_LINES) - 1); 217 218 dev_info(dev, "modem status: %i %s\n", 219 ddata->status, 220 phy_mdm6600_status_name[ddata->status]); 221 complete(&ddata->ack); 222 } 223 224 static irqreturn_t phy_mdm6600_irq_thread(int irq, void *data) 225 { 226 struct phy_mdm6600 *ddata = data; 227 228 schedule_delayed_work(&ddata->status_work, msecs_to_jiffies(10)); 229 230 return IRQ_HANDLED; 231 } 232 233 /** 234 * phy_mdm6600_wakeirq_thread - handle mode1 line OOB wake after booting 235 * @irq: interrupt 236 * @data: interrupt handler data 237 * 238 * GPIO mode1 is used initially as output to configure the USB boot 239 * mode for mdm6600. After booting it is used as input for OOB wake 240 * signal from mdm6600 to the SoC. Just use it for debug info only 241 * for now. 242 */ 243 static irqreturn_t phy_mdm6600_wakeirq_thread(int irq, void *data) 244 { 245 struct phy_mdm6600 *ddata = data; 246 struct gpio_desc *mode_gpio1; 247 int error, wakeup; 248 249 mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; 250 wakeup = gpiod_get_value(mode_gpio1); 251 if (!wakeup) 252 return IRQ_NONE; 253 254 dev_dbg(ddata->dev, "OOB wake on mode_gpio1: %i\n", wakeup); 255 error = pm_runtime_get_sync(ddata->dev); 256 if (error < 0) { 257 pm_runtime_put_noidle(ddata->dev); 258 259 return IRQ_NONE; 260 } 261 262 /* Just wake-up and kick the autosuspend timer */ 263 pm_runtime_mark_last_busy(ddata->dev); 264 pm_runtime_put_autosuspend(ddata->dev); 265 266 return IRQ_HANDLED; 267 } 268 269 /** 270 * phy_mdm6600_init_irq() - initialize mdm6600 status IRQ lines 271 * @ddata: device driver data 272 */ 273 static void phy_mdm6600_init_irq(struct phy_mdm6600 *ddata) 274 { 275 struct device *dev = ddata->dev; 276 int i, error, irq; 277 278 for (i = PHY_MDM6600_STATUS0; 279 i <= PHY_MDM6600_STATUS2; i++) { 280 struct gpio_desc *gpio = ddata->status_gpios->desc[i]; 281 282 irq = gpiod_to_irq(gpio); 283 if (irq <= 0) 284 continue; 285 286 error = devm_request_threaded_irq(dev, irq, NULL, 287 phy_mdm6600_irq_thread, 288 IRQF_TRIGGER_RISING | 289 IRQF_TRIGGER_FALLING | 290 IRQF_ONESHOT, 291 "mdm6600", 292 ddata); 293 if (error) 294 dev_warn(dev, "no modem status irq%i: %i\n", 295 irq, error); 296 } 297 } 298 299 struct phy_mdm6600_map { 300 const char *name; 301 int direction; 302 }; 303 304 static const struct phy_mdm6600_map 305 phy_mdm6600_ctrl_gpio_map[PHY_MDM6600_NR_CTRL_LINES] = { 306 { "enable", GPIOD_OUT_LOW, }, /* low = phy disabled */ 307 { "power", GPIOD_OUT_LOW, }, /* low = off */ 308 { "reset", GPIOD_OUT_HIGH, }, /* high = reset */ 309 }; 310 311 /** 312 * phy_mdm6600_init_lines() - initialize mdm6600 GPIO lines 313 * @ddata: device driver data 314 */ 315 static int phy_mdm6600_init_lines(struct phy_mdm6600 *ddata) 316 { 317 struct device *dev = ddata->dev; 318 int i; 319 320 /* MDM6600 control lines */ 321 for (i = 0; i < ARRAY_SIZE(phy_mdm6600_ctrl_gpio_map); i++) { 322 const struct phy_mdm6600_map *map = 323 &phy_mdm6600_ctrl_gpio_map[i]; 324 struct gpio_desc **gpio = &ddata->ctrl_gpios[i]; 325 326 *gpio = devm_gpiod_get(dev, map->name, map->direction); 327 if (IS_ERR(*gpio)) { 328 dev_info(dev, "gpio %s error %li\n", 329 map->name, PTR_ERR(*gpio)); 330 return PTR_ERR(*gpio); 331 } 332 } 333 334 /* MDM6600 USB start-up mode output lines */ 335 ddata->mode_gpios = devm_gpiod_get_array(dev, "motorola,mode", 336 GPIOD_OUT_LOW); 337 if (IS_ERR(ddata->mode_gpios)) 338 return PTR_ERR(ddata->mode_gpios); 339 340 if (ddata->mode_gpios->ndescs != PHY_MDM6600_NR_MODE_LINES) 341 return -EINVAL; 342 343 /* MDM6600 status input lines */ 344 ddata->status_gpios = devm_gpiod_get_array(dev, "motorola,status", 345 GPIOD_IN); 346 if (IS_ERR(ddata->status_gpios)) 347 return PTR_ERR(ddata->status_gpios); 348 349 if (ddata->status_gpios->ndescs != PHY_MDM6600_NR_STATUS_LINES) 350 return -EINVAL; 351 352 /* MDM6600 cmd output lines */ 353 ddata->cmd_gpios = devm_gpiod_get_array(dev, "motorola,cmd", 354 GPIOD_OUT_LOW); 355 if (IS_ERR(ddata->cmd_gpios)) 356 return PTR_ERR(ddata->cmd_gpios); 357 358 if (ddata->cmd_gpios->ndescs != PHY_MDM6600_NR_CMD_LINES) 359 return -EINVAL; 360 361 return 0; 362 } 363 364 /** 365 * phy_mdm6600_device_power_on() - power on mdm6600 device 366 * @ddata: device driver data 367 * 368 * To get the integrated USB phy in MDM6600 takes some hoops. We must ensure 369 * the shared USB bootmode GPIOs are configured, then request modem start-up, 370 * reset and power-up.. And then we need to recycle the shared USB bootmode 371 * GPIOs as they are also used for Out of Band (OOB) wake for the USB and 372 * TS 27.010 serial mux. 373 */ 374 static int phy_mdm6600_device_power_on(struct phy_mdm6600 *ddata) 375 { 376 struct gpio_desc *mode_gpio0, *mode_gpio1, *reset_gpio, *power_gpio; 377 int error = 0, wakeirq; 378 379 mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; 380 mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; 381 reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; 382 power_gpio = ddata->ctrl_gpios[PHY_MDM6600_POWER]; 383 384 /* 385 * Shared GPIOs must be low for normal USB mode. After booting 386 * they are used for OOB wake signaling. These can be also used 387 * to configure USB flashing mode later on based on a module 388 * parameter. 389 */ 390 gpiod_set_value_cansleep(mode_gpio0, 0); 391 gpiod_set_value_cansleep(mode_gpio1, 0); 392 393 /* Request start-up mode */ 394 phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_NO_BYPASS); 395 396 /* Request a reset first */ 397 gpiod_set_value_cansleep(reset_gpio, 0); 398 msleep(100); 399 400 /* Toggle power GPIO to request mdm6600 to start */ 401 gpiod_set_value_cansleep(power_gpio, 1); 402 msleep(100); 403 gpiod_set_value_cansleep(power_gpio, 0); 404 405 /* 406 * Looks like the USB PHY needs between 2.2 to 4 seconds. 407 * If we try to use it before that, we will get L3 errors 408 * from omap-usb-host trying to access the PHY. See also 409 * phy_mdm6600_init() for -EPROBE_DEFER. 410 */ 411 msleep(PHY_MDM6600_PHY_DELAY_MS); 412 ddata->enabled = true; 413 414 /* Booting up the rest of MDM6600 will take total about 8 seconds */ 415 dev_info(ddata->dev, "Waiting for power up request to complete..\n"); 416 if (wait_for_completion_timeout(&ddata->ack, 417 msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS))) { 418 if (ddata->status > PHY_MDM6600_STATUS_PANIC && 419 ddata->status < PHY_MDM6600_STATUS_SHUTDOWN_ACK) 420 dev_info(ddata->dev, "Powered up OK\n"); 421 } else { 422 ddata->enabled = false; 423 error = -ETIMEDOUT; 424 dev_err(ddata->dev, "Timed out powering up\n"); 425 } 426 427 /* Reconfigure mode1 GPIO as input for OOB wake */ 428 gpiod_direction_input(mode_gpio1); 429 430 wakeirq = gpiod_to_irq(mode_gpio1); 431 if (wakeirq <= 0) 432 return wakeirq; 433 434 error = devm_request_threaded_irq(ddata->dev, wakeirq, NULL, 435 phy_mdm6600_wakeirq_thread, 436 IRQF_TRIGGER_RISING | 437 IRQF_TRIGGER_FALLING | 438 IRQF_ONESHOT, 439 "mdm6600-wake", 440 ddata); 441 if (error) 442 dev_warn(ddata->dev, "no modem wakeirq irq%i: %i\n", 443 wakeirq, error); 444 445 ddata->running = true; 446 447 return error; 448 } 449 450 /** 451 * phy_mdm6600_device_power_off() - power off mdm6600 device 452 * @ddata: device driver data 453 */ 454 static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata) 455 { 456 struct gpio_desc *reset_gpio = 457 ddata->ctrl_gpios[PHY_MDM6600_RESET]; 458 459 ddata->enabled = false; 460 phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ); 461 msleep(100); 462 463 gpiod_set_value_cansleep(reset_gpio, 1); 464 465 dev_info(ddata->dev, "Waiting for power down request to complete.. "); 466 if (wait_for_completion_timeout(&ddata->ack, 467 msecs_to_jiffies(5000))) { 468 if (ddata->status == PHY_MDM6600_STATUS_PANIC) 469 dev_info(ddata->dev, "Powered down OK\n"); 470 } else { 471 dev_err(ddata->dev, "Timed out powering down\n"); 472 } 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 /* Active state selected in phy_mdm6600_power_on() */ 574 error = pinctrl_pm_select_sleep_state(ddata->dev); 575 if (error) 576 dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", 577 __func__, error); 578 579 error = phy_mdm6600_init_lines(ddata); 580 if (error) 581 return error; 582 583 phy_mdm6600_init_irq(ddata); 584 schedule_delayed_work(&ddata->bootup_work, 0); 585 586 /* 587 * See phy_mdm6600_device_power_on(). We should be able 588 * to remove this eventually when ohci-platform can deal 589 * with -EPROBE_DEFER. 590 */ 591 msleep(PHY_MDM6600_PHY_DELAY_MS + 500); 592 593 /* 594 * Enable PM runtime only after PHY has been powered up properly. 595 * It is currently only needed after USB suspends mdm6600 and n_gsm 596 * needs to access the device. We don't want to do this earlier as 597 * gpio mode0 pin doubles as mdm6600 wake-up gpio. 598 */ 599 pm_runtime_use_autosuspend(ddata->dev); 600 pm_runtime_set_autosuspend_delay(ddata->dev, 601 MDM6600_MODEM_IDLE_DELAY_MS); 602 pm_runtime_enable(ddata->dev); 603 error = pm_runtime_get_sync(ddata->dev); 604 if (error < 0) { 605 dev_warn(ddata->dev, "failed to wake modem: %i\n", error); 606 pm_runtime_put_noidle(ddata->dev); 607 goto cleanup; 608 } 609 610 ddata->generic_phy = devm_phy_create(ddata->dev, NULL, &gpio_usb_ops); 611 if (IS_ERR(ddata->generic_phy)) { 612 error = PTR_ERR(ddata->generic_phy); 613 goto idle; 614 } 615 616 phy_set_drvdata(ddata->generic_phy, ddata); 617 618 ddata->phy_provider = 619 devm_of_phy_provider_register(ddata->dev, 620 of_phy_simple_xlate); 621 if (IS_ERR(ddata->phy_provider)) 622 error = PTR_ERR(ddata->phy_provider); 623 624 idle: 625 pm_runtime_mark_last_busy(ddata->dev); 626 pm_runtime_put_autosuspend(ddata->dev); 627 628 cleanup: 629 if (error < 0) 630 phy_mdm6600_device_power_off(ddata); 631 632 return error; 633 } 634 635 static int phy_mdm6600_remove(struct platform_device *pdev) 636 { 637 struct phy_mdm6600 *ddata = platform_get_drvdata(pdev); 638 struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; 639 640 pm_runtime_dont_use_autosuspend(ddata->dev); 641 pm_runtime_put_sync(ddata->dev); 642 pm_runtime_disable(ddata->dev); 643 644 if (!ddata->running) 645 wait_for_completion_timeout(&ddata->ack, 646 msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS)); 647 648 gpiod_set_value_cansleep(reset_gpio, 1); 649 phy_mdm6600_device_power_off(ddata); 650 651 cancel_delayed_work_sync(&ddata->modem_wake_work); 652 cancel_delayed_work_sync(&ddata->bootup_work); 653 cancel_delayed_work_sync(&ddata->status_work); 654 655 return 0; 656 } 657 658 static struct platform_driver phy_mdm6600_driver = { 659 .probe = phy_mdm6600_probe, 660 .remove = phy_mdm6600_remove, 661 .driver = { 662 .name = "phy-mapphone-mdm6600", 663 .pm = &phy_mdm6600_pm_ops, 664 .of_match_table = of_match_ptr(phy_mdm6600_id_table), 665 }, 666 }; 667 668 module_platform_driver(phy_mdm6600_driver); 669 670 MODULE_ALIAS("platform:gpio_usb"); 671 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); 672 MODULE_DESCRIPTION("mdm6600 gpio usb phy driver"); 673 MODULE_LICENSE("GPL v2"); 674