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 * @val: value of cmd to be set 182 * 183 * Configures the three command request GPIOs to the specified value. 184 */ 185 static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val) 186 { 187 DECLARE_BITMAP(values, PHY_MDM6600_NR_CMD_LINES); 188 189 values[0] = val; 190 191 gpiod_set_array_value_cansleep(PHY_MDM6600_NR_CMD_LINES, 192 ddata->cmd_gpios->desc, 193 ddata->cmd_gpios->info, values); 194 } 195 196 /** 197 * phy_mdm6600_status() - read mdm6600 status lines 198 * @work: work structure 199 */ 200 static void phy_mdm6600_status(struct work_struct *work) 201 { 202 struct phy_mdm6600 *ddata; 203 struct device *dev; 204 DECLARE_BITMAP(values, PHY_MDM6600_NR_STATUS_LINES); 205 int error; 206 207 ddata = container_of(work, struct phy_mdm6600, status_work.work); 208 dev = ddata->dev; 209 210 error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES, 211 ddata->status_gpios->desc, 212 ddata->status_gpios->info, 213 values); 214 if (error) 215 return; 216 217 ddata->status = values[0] & ((1 << PHY_MDM6600_NR_STATUS_LINES) - 1); 218 219 dev_info(dev, "modem status: %i %s\n", 220 ddata->status, 221 phy_mdm6600_status_name[ddata->status]); 222 complete(&ddata->ack); 223 } 224 225 static irqreturn_t phy_mdm6600_irq_thread(int irq, void *data) 226 { 227 struct phy_mdm6600 *ddata = data; 228 229 schedule_delayed_work(&ddata->status_work, msecs_to_jiffies(10)); 230 231 return IRQ_HANDLED; 232 } 233 234 /** 235 * phy_mdm6600_wakeirq_thread - handle mode1 line OOB wake after booting 236 * @irq: interrupt 237 * @data: interrupt handler data 238 * 239 * GPIO mode1 is used initially as output to configure the USB boot 240 * mode for mdm6600. After booting it is used as input for OOB wake 241 * signal from mdm6600 to the SoC. Just use it for debug info only 242 * for now. 243 */ 244 static irqreturn_t phy_mdm6600_wakeirq_thread(int irq, void *data) 245 { 246 struct phy_mdm6600 *ddata = data; 247 struct gpio_desc *mode_gpio1; 248 int error, wakeup; 249 250 mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; 251 wakeup = gpiod_get_value(mode_gpio1); 252 if (!wakeup) 253 return IRQ_NONE; 254 255 dev_dbg(ddata->dev, "OOB wake on mode_gpio1: %i\n", wakeup); 256 error = pm_runtime_get_sync(ddata->dev); 257 if (error < 0) { 258 pm_runtime_put_noidle(ddata->dev); 259 260 return IRQ_NONE; 261 } 262 263 /* Just wake-up and kick the autosuspend timer */ 264 pm_runtime_mark_last_busy(ddata->dev); 265 pm_runtime_put_autosuspend(ddata->dev); 266 267 return IRQ_HANDLED; 268 } 269 270 /** 271 * phy_mdm6600_init_irq() - initialize mdm6600 status IRQ lines 272 * @ddata: device driver data 273 */ 274 static void phy_mdm6600_init_irq(struct phy_mdm6600 *ddata) 275 { 276 struct device *dev = ddata->dev; 277 int i, error, irq; 278 279 for (i = PHY_MDM6600_STATUS0; 280 i <= PHY_MDM6600_STATUS2; i++) { 281 struct gpio_desc *gpio = ddata->status_gpios->desc[i]; 282 283 irq = gpiod_to_irq(gpio); 284 if (irq <= 0) 285 continue; 286 287 error = devm_request_threaded_irq(dev, irq, NULL, 288 phy_mdm6600_irq_thread, 289 IRQF_TRIGGER_RISING | 290 IRQF_TRIGGER_FALLING | 291 IRQF_ONESHOT, 292 "mdm6600", 293 ddata); 294 if (error) 295 dev_warn(dev, "no modem status irq%i: %i\n", 296 irq, error); 297 } 298 } 299 300 struct phy_mdm6600_map { 301 const char *name; 302 int direction; 303 }; 304 305 static const struct phy_mdm6600_map 306 phy_mdm6600_ctrl_gpio_map[PHY_MDM6600_NR_CTRL_LINES] = { 307 { "enable", GPIOD_OUT_LOW, }, /* low = phy disabled */ 308 { "power", GPIOD_OUT_LOW, }, /* low = off */ 309 { "reset", GPIOD_OUT_HIGH, }, /* high = reset */ 310 }; 311 312 /** 313 * phy_mdm6600_init_lines() - initialize mdm6600 GPIO lines 314 * @ddata: device driver data 315 */ 316 static int phy_mdm6600_init_lines(struct phy_mdm6600 *ddata) 317 { 318 struct device *dev = ddata->dev; 319 int i; 320 321 /* MDM6600 control lines */ 322 for (i = 0; i < ARRAY_SIZE(phy_mdm6600_ctrl_gpio_map); i++) { 323 const struct phy_mdm6600_map *map = 324 &phy_mdm6600_ctrl_gpio_map[i]; 325 struct gpio_desc **gpio = &ddata->ctrl_gpios[i]; 326 327 *gpio = devm_gpiod_get(dev, map->name, map->direction); 328 if (IS_ERR(*gpio)) { 329 dev_info(dev, "gpio %s error %li\n", 330 map->name, PTR_ERR(*gpio)); 331 return PTR_ERR(*gpio); 332 } 333 } 334 335 /* MDM6600 USB start-up mode output lines */ 336 ddata->mode_gpios = devm_gpiod_get_array(dev, "motorola,mode", 337 GPIOD_OUT_LOW); 338 if (IS_ERR(ddata->mode_gpios)) 339 return PTR_ERR(ddata->mode_gpios); 340 341 if (ddata->mode_gpios->ndescs != PHY_MDM6600_NR_MODE_LINES) 342 return -EINVAL; 343 344 /* MDM6600 status input lines */ 345 ddata->status_gpios = devm_gpiod_get_array(dev, "motorola,status", 346 GPIOD_IN); 347 if (IS_ERR(ddata->status_gpios)) 348 return PTR_ERR(ddata->status_gpios); 349 350 if (ddata->status_gpios->ndescs != PHY_MDM6600_NR_STATUS_LINES) 351 return -EINVAL; 352 353 /* MDM6600 cmd output lines */ 354 ddata->cmd_gpios = devm_gpiod_get_array(dev, "motorola,cmd", 355 GPIOD_OUT_LOW); 356 if (IS_ERR(ddata->cmd_gpios)) 357 return PTR_ERR(ddata->cmd_gpios); 358 359 if (ddata->cmd_gpios->ndescs != PHY_MDM6600_NR_CMD_LINES) 360 return -EINVAL; 361 362 return 0; 363 } 364 365 /** 366 * phy_mdm6600_device_power_on() - power on mdm6600 device 367 * @ddata: device driver data 368 * 369 * To get the integrated USB phy in MDM6600 takes some hoops. We must ensure 370 * the shared USB bootmode GPIOs are configured, then request modem start-up, 371 * reset and power-up.. And then we need to recycle the shared USB bootmode 372 * GPIOs as they are also used for Out of Band (OOB) wake for the USB and 373 * TS 27.010 serial mux. 374 */ 375 static int phy_mdm6600_device_power_on(struct phy_mdm6600 *ddata) 376 { 377 struct gpio_desc *mode_gpio0, *mode_gpio1, *reset_gpio, *power_gpio; 378 int error = 0, wakeirq; 379 380 mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; 381 mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; 382 reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; 383 power_gpio = ddata->ctrl_gpios[PHY_MDM6600_POWER]; 384 385 /* 386 * Shared GPIOs must be low for normal USB mode. After booting 387 * they are used for OOB wake signaling. These can be also used 388 * to configure USB flashing mode later on based on a module 389 * parameter. 390 */ 391 gpiod_set_value_cansleep(mode_gpio0, 0); 392 gpiod_set_value_cansleep(mode_gpio1, 0); 393 394 /* Request start-up mode */ 395 phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_NO_BYPASS); 396 397 /* Request a reset first */ 398 gpiod_set_value_cansleep(reset_gpio, 0); 399 msleep(100); 400 401 /* Toggle power GPIO to request mdm6600 to start */ 402 gpiod_set_value_cansleep(power_gpio, 1); 403 msleep(100); 404 gpiod_set_value_cansleep(power_gpio, 0); 405 406 /* 407 * Looks like the USB PHY needs between 2.2 to 4 seconds. 408 * If we try to use it before that, we will get L3 errors 409 * from omap-usb-host trying to access the PHY. See also 410 * phy_mdm6600_init() for -EPROBE_DEFER. 411 */ 412 msleep(PHY_MDM6600_PHY_DELAY_MS); 413 ddata->enabled = true; 414 415 /* Booting up the rest of MDM6600 will take total about 8 seconds */ 416 dev_info(ddata->dev, "Waiting for power up request to complete..\n"); 417 if (wait_for_completion_timeout(&ddata->ack, 418 msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS))) { 419 if (ddata->status > PHY_MDM6600_STATUS_PANIC && 420 ddata->status < PHY_MDM6600_STATUS_SHUTDOWN_ACK) 421 dev_info(ddata->dev, "Powered up OK\n"); 422 } else { 423 ddata->enabled = false; 424 error = -ETIMEDOUT; 425 dev_err(ddata->dev, "Timed out powering up\n"); 426 } 427 428 /* Reconfigure mode1 GPIO as input for OOB wake */ 429 gpiod_direction_input(mode_gpio1); 430 431 wakeirq = gpiod_to_irq(mode_gpio1); 432 if (wakeirq <= 0) 433 return wakeirq; 434 435 error = devm_request_threaded_irq(ddata->dev, wakeirq, NULL, 436 phy_mdm6600_wakeirq_thread, 437 IRQF_TRIGGER_RISING | 438 IRQF_TRIGGER_FALLING | 439 IRQF_ONESHOT, 440 "mdm6600-wake", 441 ddata); 442 if (error) 443 dev_warn(ddata->dev, "no modem wakeirq irq%i: %i\n", 444 wakeirq, error); 445 446 ddata->running = true; 447 448 return error; 449 } 450 451 /** 452 * phy_mdm6600_device_power_off() - power off mdm6600 device 453 * @ddata: device driver data 454 */ 455 static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata) 456 { 457 struct gpio_desc *reset_gpio = 458 ddata->ctrl_gpios[PHY_MDM6600_RESET]; 459 460 ddata->enabled = false; 461 phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ); 462 msleep(100); 463 464 gpiod_set_value_cansleep(reset_gpio, 1); 465 466 dev_info(ddata->dev, "Waiting for power down request to complete.. "); 467 if (wait_for_completion_timeout(&ddata->ack, 468 msecs_to_jiffies(5000))) { 469 if (ddata->status == PHY_MDM6600_STATUS_PANIC) 470 dev_info(ddata->dev, "Powered down OK\n"); 471 } else { 472 dev_err(ddata->dev, "Timed out powering down\n"); 473 } 474 } 475 476 static void phy_mdm6600_deferred_power_on(struct work_struct *work) 477 { 478 struct phy_mdm6600 *ddata; 479 int error; 480 481 ddata = container_of(work, struct phy_mdm6600, bootup_work.work); 482 483 error = phy_mdm6600_device_power_on(ddata); 484 if (error) 485 dev_err(ddata->dev, "Device not functional\n"); 486 } 487 488 /* 489 * USB suspend puts mdm6600 into low power mode. For any n_gsm using apps, 490 * we need to keep the modem awake by kicking it's mode0 GPIO. This will 491 * keep the modem awake for about 1.2 seconds. When no n_gsm apps are using 492 * the modem, runtime PM auto mode can be enabled so modem can enter low 493 * power mode. 494 */ 495 static void phy_mdm6600_wake_modem(struct phy_mdm6600 *ddata) 496 { 497 struct gpio_desc *mode_gpio0; 498 499 mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; 500 gpiod_set_value_cansleep(mode_gpio0, 1); 501 usleep_range(5, 15); 502 gpiod_set_value_cansleep(mode_gpio0, 0); 503 if (ddata->awake) 504 usleep_range(5, 15); 505 else 506 msleep(MDM6600_MODEM_WAKE_DELAY_MS); 507 } 508 509 static void phy_mdm6600_modem_wake(struct work_struct *work) 510 { 511 struct phy_mdm6600 *ddata; 512 513 ddata = container_of(work, struct phy_mdm6600, modem_wake_work.work); 514 phy_mdm6600_wake_modem(ddata); 515 516 /* 517 * The modem does not always stay awake 1.2 seconds after toggling 518 * the wake GPIO, and sometimes it idles after about some 600 ms 519 * making writes time out. 520 */ 521 schedule_delayed_work(&ddata->modem_wake_work, 522 msecs_to_jiffies(PHY_MDM6600_WAKE_KICK_MS)); 523 } 524 525 static int __maybe_unused phy_mdm6600_runtime_suspend(struct device *dev) 526 { 527 struct phy_mdm6600 *ddata = dev_get_drvdata(dev); 528 529 cancel_delayed_work_sync(&ddata->modem_wake_work); 530 ddata->awake = false; 531 532 return 0; 533 } 534 535 static int __maybe_unused phy_mdm6600_runtime_resume(struct device *dev) 536 { 537 struct phy_mdm6600 *ddata = dev_get_drvdata(dev); 538 539 phy_mdm6600_modem_wake(&ddata->modem_wake_work.work); 540 ddata->awake = true; 541 542 return 0; 543 } 544 545 static const struct dev_pm_ops phy_mdm6600_pm_ops = { 546 SET_RUNTIME_PM_OPS(phy_mdm6600_runtime_suspend, 547 phy_mdm6600_runtime_resume, NULL) 548 }; 549 550 static const struct of_device_id phy_mdm6600_id_table[] = { 551 { .compatible = "motorola,mapphone-mdm6600", }, 552 {}, 553 }; 554 MODULE_DEVICE_TABLE(of, phy_mdm6600_id_table); 555 556 static int phy_mdm6600_probe(struct platform_device *pdev) 557 { 558 struct phy_mdm6600 *ddata; 559 int error; 560 561 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); 562 if (!ddata) 563 return -ENOMEM; 564 565 INIT_DELAYED_WORK(&ddata->bootup_work, 566 phy_mdm6600_deferred_power_on); 567 INIT_DELAYED_WORK(&ddata->status_work, phy_mdm6600_status); 568 INIT_DELAYED_WORK(&ddata->modem_wake_work, phy_mdm6600_modem_wake); 569 init_completion(&ddata->ack); 570 571 ddata->dev = &pdev->dev; 572 platform_set_drvdata(pdev, ddata); 573 574 /* Active state selected in phy_mdm6600_power_on() */ 575 error = pinctrl_pm_select_sleep_state(ddata->dev); 576 if (error) 577 dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", 578 __func__, error); 579 580 error = phy_mdm6600_init_lines(ddata); 581 if (error) 582 return error; 583 584 phy_mdm6600_init_irq(ddata); 585 schedule_delayed_work(&ddata->bootup_work, 0); 586 587 /* 588 * See phy_mdm6600_device_power_on(). We should be able 589 * to remove this eventually when ohci-platform can deal 590 * with -EPROBE_DEFER. 591 */ 592 msleep(PHY_MDM6600_PHY_DELAY_MS + 500); 593 594 /* 595 * Enable PM runtime only after PHY has been powered up properly. 596 * It is currently only needed after USB suspends mdm6600 and n_gsm 597 * needs to access the device. We don't want to do this earlier as 598 * gpio mode0 pin doubles as mdm6600 wake-up gpio. 599 */ 600 pm_runtime_use_autosuspend(ddata->dev); 601 pm_runtime_set_autosuspend_delay(ddata->dev, 602 MDM6600_MODEM_IDLE_DELAY_MS); 603 pm_runtime_enable(ddata->dev); 604 error = pm_runtime_get_sync(ddata->dev); 605 if (error < 0) { 606 dev_warn(ddata->dev, "failed to wake modem: %i\n", error); 607 pm_runtime_put_noidle(ddata->dev); 608 goto cleanup; 609 } 610 611 ddata->generic_phy = devm_phy_create(ddata->dev, NULL, &gpio_usb_ops); 612 if (IS_ERR(ddata->generic_phy)) { 613 error = PTR_ERR(ddata->generic_phy); 614 goto idle; 615 } 616 617 phy_set_drvdata(ddata->generic_phy, ddata); 618 619 ddata->phy_provider = 620 devm_of_phy_provider_register(ddata->dev, 621 of_phy_simple_xlate); 622 if (IS_ERR(ddata->phy_provider)) 623 error = PTR_ERR(ddata->phy_provider); 624 625 idle: 626 pm_runtime_mark_last_busy(ddata->dev); 627 pm_runtime_put_autosuspend(ddata->dev); 628 629 cleanup: 630 if (error < 0) 631 phy_mdm6600_device_power_off(ddata); 632 pm_runtime_disable(ddata->dev); 633 pm_runtime_dont_use_autosuspend(ddata->dev); 634 return error; 635 } 636 637 static int phy_mdm6600_remove(struct platform_device *pdev) 638 { 639 struct phy_mdm6600 *ddata = platform_get_drvdata(pdev); 640 struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; 641 642 pm_runtime_dont_use_autosuspend(ddata->dev); 643 pm_runtime_put_sync(ddata->dev); 644 pm_runtime_disable(ddata->dev); 645 646 if (!ddata->running) 647 wait_for_completion_timeout(&ddata->ack, 648 msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS)); 649 650 gpiod_set_value_cansleep(reset_gpio, 1); 651 phy_mdm6600_device_power_off(ddata); 652 653 cancel_delayed_work_sync(&ddata->modem_wake_work); 654 cancel_delayed_work_sync(&ddata->bootup_work); 655 cancel_delayed_work_sync(&ddata->status_work); 656 657 return 0; 658 } 659 660 static struct platform_driver phy_mdm6600_driver = { 661 .probe = phy_mdm6600_probe, 662 .remove = phy_mdm6600_remove, 663 .driver = { 664 .name = "phy-mapphone-mdm6600", 665 .pm = &phy_mdm6600_pm_ops, 666 .of_match_table = of_match_ptr(phy_mdm6600_id_table), 667 }, 668 }; 669 670 module_platform_driver(phy_mdm6600_driver); 671 672 MODULE_ALIAS("platform:gpio_usb"); 673 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); 674 MODULE_DESCRIPTION("mdm6600 gpio usb phy driver"); 675 MODULE_LICENSE("GPL v2"); 676