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