1 /* 2 * Cypress APA trackpad with I2C interface 3 * 4 * Author: Dudley Du <dudl@cypress.com> 5 * Further cleanup and restructuring by: 6 * Daniel Kurtz <djkurtz@chromium.org> 7 * Benson Leung <bleung@chromium.org> 8 * 9 * Copyright (C) 2011-2015 Cypress Semiconductor, Inc. 10 * Copyright (C) 2011-2012 Google, Inc. 11 * 12 * This file is subject to the terms and conditions of the GNU General Public 13 * License. See the file COPYING in the main directory of this archive for 14 * more details. 15 */ 16 17 #include <linux/delay.h> 18 #include <linux/i2c.h> 19 #include <linux/input.h> 20 #include <linux/input/mt.h> 21 #include <linux/interrupt.h> 22 #include <linux/module.h> 23 #include <linux/mutex.h> 24 #include <linux/regulator/consumer.h> 25 #include <linux/slab.h> 26 #include <linux/uaccess.h> 27 #include <linux/pm_runtime.h> 28 #include <linux/acpi.h> 29 #include <linux/of.h> 30 #include "cyapa.h" 31 32 33 #define CYAPA_ADAPTER_FUNC_NONE 0 34 #define CYAPA_ADAPTER_FUNC_I2C 1 35 #define CYAPA_ADAPTER_FUNC_SMBUS 2 36 #define CYAPA_ADAPTER_FUNC_BOTH 3 37 38 #define CYAPA_FW_NAME "cyapa.bin" 39 40 const char product_id[] = "CYTRA"; 41 42 static int cyapa_reinitialize(struct cyapa *cyapa); 43 44 bool cyapa_is_pip_bl_mode(struct cyapa *cyapa) 45 { 46 if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_BL) 47 return true; 48 49 if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_BL) 50 return true; 51 52 return false; 53 } 54 55 bool cyapa_is_pip_app_mode(struct cyapa *cyapa) 56 { 57 if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_APP) 58 return true; 59 60 if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_APP) 61 return true; 62 63 return false; 64 } 65 66 static bool cyapa_is_bootloader_mode(struct cyapa *cyapa) 67 { 68 if (cyapa_is_pip_bl_mode(cyapa)) 69 return true; 70 71 if (cyapa->gen == CYAPA_GEN3 && 72 cyapa->state >= CYAPA_STATE_BL_BUSY && 73 cyapa->state <= CYAPA_STATE_BL_ACTIVE) 74 return true; 75 76 return false; 77 } 78 79 static inline bool cyapa_is_operational_mode(struct cyapa *cyapa) 80 { 81 if (cyapa_is_pip_app_mode(cyapa)) 82 return true; 83 84 if (cyapa->gen == CYAPA_GEN3 && cyapa->state == CYAPA_STATE_OP) 85 return true; 86 87 return false; 88 } 89 90 /* Returns 0 on success, else negative errno on failure. */ 91 static ssize_t cyapa_i2c_read(struct cyapa *cyapa, u8 reg, size_t len, 92 u8 *values) 93 { 94 struct i2c_client *client = cyapa->client; 95 struct i2c_msg msgs[] = { 96 { 97 .addr = client->addr, 98 .flags = 0, 99 .len = 1, 100 .buf = ®, 101 }, 102 { 103 .addr = client->addr, 104 .flags = I2C_M_RD, 105 .len = len, 106 .buf = values, 107 }, 108 }; 109 int ret; 110 111 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 112 113 if (ret != ARRAY_SIZE(msgs)) 114 return ret < 0 ? ret : -EIO; 115 116 return 0; 117 } 118 119 /** 120 * cyapa_i2c_write - Execute i2c block data write operation 121 * @cyapa: Handle to this driver 122 * @reg: Offset of the data to written in the register map 123 * @len: number of bytes to write 124 * @values: Data to be written 125 * 126 * Return negative errno code on error; return zero when success. 127 */ 128 static int cyapa_i2c_write(struct cyapa *cyapa, u8 reg, 129 size_t len, const void *values) 130 { 131 struct i2c_client *client = cyapa->client; 132 char buf[32]; 133 int ret; 134 135 if (len > sizeof(buf) - 1) 136 return -ENOMEM; 137 138 buf[0] = reg; 139 memcpy(&buf[1], values, len); 140 141 ret = i2c_master_send(client, buf, len + 1); 142 if (ret != len + 1) 143 return ret < 0 ? ret : -EIO; 144 145 return 0; 146 } 147 148 static u8 cyapa_check_adapter_functionality(struct i2c_client *client) 149 { 150 u8 ret = CYAPA_ADAPTER_FUNC_NONE; 151 152 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) 153 ret |= CYAPA_ADAPTER_FUNC_I2C; 154 if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | 155 I2C_FUNC_SMBUS_BLOCK_DATA | 156 I2C_FUNC_SMBUS_I2C_BLOCK)) 157 ret |= CYAPA_ADAPTER_FUNC_SMBUS; 158 return ret; 159 } 160 161 /* 162 * Query device for its current operating state. 163 */ 164 static int cyapa_get_state(struct cyapa *cyapa) 165 { 166 u8 status[BL_STATUS_SIZE]; 167 u8 cmd[32]; 168 /* The i2c address of gen4 and gen5 trackpad device must be even. */ 169 bool even_addr = ((cyapa->client->addr & 0x0001) == 0); 170 bool smbus = false; 171 int retries = 2; 172 int error; 173 174 cyapa->state = CYAPA_STATE_NO_DEVICE; 175 176 /* 177 * Get trackpad status by reading 3 registers starting from 0. 178 * If the device is in the bootloader, this will be BL_HEAD. 179 * If the device is in operation mode, this will be the DATA regs. 180 * 181 */ 182 error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE, 183 status); 184 185 /* 186 * On smbus systems in OP mode, the i2c_reg_read will fail with 187 * -ETIMEDOUT. In this case, try again using the smbus equivalent 188 * command. This should return a BL_HEAD indicating CYAPA_STATE_OP. 189 */ 190 if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) { 191 if (!even_addr) 192 error = cyapa_read_block(cyapa, 193 CYAPA_CMD_BL_STATUS, status); 194 smbus = true; 195 } 196 197 if (error != BL_STATUS_SIZE) 198 goto error; 199 200 /* 201 * Detect trackpad protocol based on characteristic registers and bits. 202 */ 203 do { 204 cyapa->status[REG_OP_STATUS] = status[REG_OP_STATUS]; 205 cyapa->status[REG_BL_STATUS] = status[REG_BL_STATUS]; 206 cyapa->status[REG_BL_ERROR] = status[REG_BL_ERROR]; 207 208 if (cyapa->gen == CYAPA_GEN_UNKNOWN || 209 cyapa->gen == CYAPA_GEN3) { 210 error = cyapa_gen3_ops.state_parse(cyapa, 211 status, BL_STATUS_SIZE); 212 if (!error) 213 goto out_detected; 214 } 215 if (cyapa->gen == CYAPA_GEN_UNKNOWN || 216 cyapa->gen == CYAPA_GEN6 || 217 cyapa->gen == CYAPA_GEN5) { 218 error = cyapa_pip_state_parse(cyapa, 219 status, BL_STATUS_SIZE); 220 if (!error) 221 goto out_detected; 222 } 223 /* For old Gen5 trackpads detecting. */ 224 if ((cyapa->gen == CYAPA_GEN_UNKNOWN || 225 cyapa->gen == CYAPA_GEN5) && 226 !smbus && even_addr) { 227 error = cyapa_gen5_ops.state_parse(cyapa, 228 status, BL_STATUS_SIZE); 229 if (!error) 230 goto out_detected; 231 } 232 233 /* 234 * Write 0x00 0x00 to trackpad device to force update its 235 * status, then redo the detection again. 236 */ 237 if (!smbus) { 238 cmd[0] = 0x00; 239 cmd[1] = 0x00; 240 error = cyapa_i2c_write(cyapa, 0, 2, cmd); 241 if (error) 242 goto error; 243 244 msleep(50); 245 246 error = cyapa_i2c_read(cyapa, BL_HEAD_OFFSET, 247 BL_STATUS_SIZE, status); 248 if (error) 249 goto error; 250 } 251 } while (--retries > 0 && !smbus); 252 253 goto error; 254 255 out_detected: 256 if (cyapa->state <= CYAPA_STATE_BL_BUSY) 257 return -EAGAIN; 258 return 0; 259 260 error: 261 return (error < 0) ? error : -EAGAIN; 262 } 263 264 /* 265 * Poll device for its status in a loop, waiting up to timeout for a response. 266 * 267 * When the device switches state, it usually takes ~300 ms. 268 * However, when running a new firmware image, the device must calibrate its 269 * sensors, which can take as long as 2 seconds. 270 * 271 * Note: The timeout has granularity of the polling rate, which is 100 ms. 272 * 273 * Returns: 274 * 0 when the device eventually responds with a valid non-busy state. 275 * -ETIMEDOUT if device never responds (too many -EAGAIN) 276 * -EAGAIN if bootload is busy, or unknown state. 277 * < 0 other errors 278 */ 279 int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout) 280 { 281 int error; 282 int tries = timeout / 100; 283 284 do { 285 error = cyapa_get_state(cyapa); 286 if (!error && cyapa->state > CYAPA_STATE_BL_BUSY) 287 return 0; 288 289 msleep(100); 290 } while (tries--); 291 292 return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error; 293 } 294 295 /* 296 * Check if device is operational. 297 * 298 * An operational device is responding, has exited bootloader, and has 299 * firmware supported by this driver. 300 * 301 * Returns: 302 * -ENODEV no device 303 * -EBUSY no device or in bootloader 304 * -EIO failure while reading from device 305 * -ETIMEDOUT timeout failure for bus idle or bus no response 306 * -EAGAIN device is still in bootloader 307 * if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware 308 * -EINVAL device is in operational mode, but not supported by this driver 309 * 0 device is supported 310 */ 311 static int cyapa_check_is_operational(struct cyapa *cyapa) 312 { 313 int error; 314 315 error = cyapa_poll_state(cyapa, 4000); 316 if (error) 317 return error; 318 319 switch (cyapa->gen) { 320 case CYAPA_GEN6: 321 cyapa->ops = &cyapa_gen6_ops; 322 break; 323 case CYAPA_GEN5: 324 cyapa->ops = &cyapa_gen5_ops; 325 break; 326 case CYAPA_GEN3: 327 cyapa->ops = &cyapa_gen3_ops; 328 break; 329 default: 330 return -ENODEV; 331 } 332 333 error = cyapa->ops->operational_check(cyapa); 334 if (!error && cyapa_is_operational_mode(cyapa)) 335 cyapa->operational = true; 336 else 337 cyapa->operational = false; 338 339 return error; 340 } 341 342 343 /* 344 * Returns 0 on device detected, negative errno on no device detected. 345 * And when the device is detected and operational, it will be reset to 346 * full power active mode automatically. 347 */ 348 static int cyapa_detect(struct cyapa *cyapa) 349 { 350 struct device *dev = &cyapa->client->dev; 351 int error; 352 353 error = cyapa_check_is_operational(cyapa); 354 if (error) { 355 if (error != -ETIMEDOUT && error != -ENODEV && 356 cyapa_is_bootloader_mode(cyapa)) { 357 dev_warn(dev, "device detected but not operational\n"); 358 return 0; 359 } 360 361 dev_err(dev, "no device detected: %d\n", error); 362 return error; 363 } 364 365 return 0; 366 } 367 368 static int cyapa_open(struct input_dev *input) 369 { 370 struct cyapa *cyapa = input_get_drvdata(input); 371 struct i2c_client *client = cyapa->client; 372 struct device *dev = &client->dev; 373 int error; 374 375 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 376 if (error) 377 return error; 378 379 if (cyapa->operational) { 380 /* 381 * though failed to set active power mode, 382 * but still may be able to work in lower scan rate 383 * when in operational mode. 384 */ 385 error = cyapa->ops->set_power_mode(cyapa, 386 PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE); 387 if (error) { 388 dev_warn(dev, "set active power failed: %d\n", error); 389 goto out; 390 } 391 } else { 392 error = cyapa_reinitialize(cyapa); 393 if (error || !cyapa->operational) { 394 error = error ? error : -EAGAIN; 395 goto out; 396 } 397 } 398 399 enable_irq(client->irq); 400 if (!pm_runtime_enabled(dev)) { 401 pm_runtime_set_active(dev); 402 pm_runtime_enable(dev); 403 } 404 405 pm_runtime_get_sync(dev); 406 pm_runtime_put_sync_autosuspend(dev); 407 out: 408 mutex_unlock(&cyapa->state_sync_lock); 409 return error; 410 } 411 412 static void cyapa_close(struct input_dev *input) 413 { 414 struct cyapa *cyapa = input_get_drvdata(input); 415 struct i2c_client *client = cyapa->client; 416 struct device *dev = &cyapa->client->dev; 417 418 mutex_lock(&cyapa->state_sync_lock); 419 420 disable_irq(client->irq); 421 if (pm_runtime_enabled(dev)) 422 pm_runtime_disable(dev); 423 pm_runtime_set_suspended(dev); 424 425 if (cyapa->operational) 426 cyapa->ops->set_power_mode(cyapa, 427 PWR_MODE_OFF, 0, CYAPA_PM_DEACTIVE); 428 429 mutex_unlock(&cyapa->state_sync_lock); 430 } 431 432 static int cyapa_create_input_dev(struct cyapa *cyapa) 433 { 434 struct device *dev = &cyapa->client->dev; 435 struct input_dev *input; 436 int error; 437 438 if (!cyapa->physical_size_x || !cyapa->physical_size_y) 439 return -EINVAL; 440 441 input = devm_input_allocate_device(dev); 442 if (!input) { 443 dev_err(dev, "failed to allocate memory for input device.\n"); 444 return -ENOMEM; 445 } 446 447 input->name = CYAPA_NAME; 448 input->phys = cyapa->phys; 449 input->id.bustype = BUS_I2C; 450 input->id.version = 1; 451 input->id.product = 0; /* Means any product in eventcomm. */ 452 453 input->open = cyapa_open; 454 input->close = cyapa_close; 455 456 input_set_drvdata(input, cyapa); 457 458 __set_bit(EV_ABS, input->evbit); 459 460 /* Finger position */ 461 input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0, 462 0); 463 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0, 464 0); 465 input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0); 466 if (cyapa->gen > CYAPA_GEN3) { 467 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 468 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); 469 /* 470 * Orientation is the angle between the vertical axis and 471 * the major axis of the contact ellipse. 472 * The range is -127 to 127. 473 * the positive direction is clockwise form the vertical axis. 474 * If the ellipse of contact degenerates into a circle, 475 * orientation is reported as 0. 476 * 477 * Also, for Gen5 trackpad the accurate of this orientation 478 * value is value + (-30 ~ 30). 479 */ 480 input_set_abs_params(input, ABS_MT_ORIENTATION, 481 -127, 127, 0, 0); 482 } 483 if (cyapa->gen >= CYAPA_GEN5) { 484 input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 485 input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0); 486 input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0); 487 } 488 489 input_abs_set_res(input, ABS_MT_POSITION_X, 490 cyapa->max_abs_x / cyapa->physical_size_x); 491 input_abs_set_res(input, ABS_MT_POSITION_Y, 492 cyapa->max_abs_y / cyapa->physical_size_y); 493 494 if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) 495 __set_bit(BTN_LEFT, input->keybit); 496 if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) 497 __set_bit(BTN_MIDDLE, input->keybit); 498 if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) 499 __set_bit(BTN_RIGHT, input->keybit); 500 501 if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK) 502 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 503 504 /* Handle pointer emulation and unused slots in core */ 505 error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS, 506 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); 507 if (error) { 508 dev_err(dev, "failed to initialize MT slots: %d\n", error); 509 return error; 510 } 511 512 /* Register the device in input subsystem */ 513 error = input_register_device(input); 514 if (error) { 515 dev_err(dev, "failed to register input device: %d\n", error); 516 return error; 517 } 518 519 cyapa->input = input; 520 return 0; 521 } 522 523 static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa) 524 { 525 struct input_dev *input = cyapa->input; 526 527 if (!input || !input_device_enabled(input)) { 528 /* 529 * When input is NULL, TP must be in deep sleep mode. 530 * In this mode, later non-power I2C command will always failed 531 * if not bring it out of deep sleep mode firstly, 532 * so must command TP to active mode here. 533 */ 534 if (!input || cyapa->operational) 535 cyapa->ops->set_power_mode(cyapa, 536 PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE); 537 /* Gen3 always using polling mode for command. */ 538 if (cyapa->gen >= CYAPA_GEN5) 539 enable_irq(cyapa->client->irq); 540 } 541 } 542 543 static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa) 544 { 545 struct input_dev *input = cyapa->input; 546 547 if (!input || !input_device_enabled(input)) { 548 if (cyapa->gen >= CYAPA_GEN5) 549 disable_irq(cyapa->client->irq); 550 if (!input || cyapa->operational) 551 cyapa->ops->set_power_mode(cyapa, 552 PWR_MODE_OFF, 0, CYAPA_PM_ACTIVE); 553 } 554 } 555 556 /* 557 * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time 558 * 559 * These are helper functions that convert to and from integer idle 560 * times and register settings to write to the PowerMode register. 561 * The trackpad supports between 20ms to 1000ms scan intervals. 562 * The time will be increased in increments of 10ms from 20ms to 100ms. 563 * From 100ms to 1000ms, time will be increased in increments of 20ms. 564 * 565 * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is: 566 * Idle_Command = Idle Time / 10; 567 * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is: 568 * Idle_Command = Idle Time / 20 + 5; 569 */ 570 u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time) 571 { 572 u16 encoded_time; 573 574 sleep_time = clamp_val(sleep_time, 20, 1000); 575 encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5; 576 return (encoded_time << 2) & PWR_MODE_MASK; 577 } 578 579 u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode) 580 { 581 u8 encoded_time = pwr_mode >> 2; 582 583 return (encoded_time < 10) ? encoded_time * 10 584 : (encoded_time - 5) * 20; 585 } 586 587 /* 0 on driver initialize and detected successfully, negative on failure. */ 588 static int cyapa_initialize(struct cyapa *cyapa) 589 { 590 int error = 0; 591 592 cyapa->state = CYAPA_STATE_NO_DEVICE; 593 cyapa->gen = CYAPA_GEN_UNKNOWN; 594 mutex_init(&cyapa->state_sync_lock); 595 596 /* 597 * Set to hard code default, they will be updated with trackpad set 598 * default values after probe and initialized. 599 */ 600 cyapa->suspend_power_mode = PWR_MODE_SLEEP; 601 cyapa->suspend_sleep_time = 602 cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode); 603 604 /* ops.initialize() is aimed to prepare for module communications. */ 605 error = cyapa_gen3_ops.initialize(cyapa); 606 if (!error) 607 error = cyapa_gen5_ops.initialize(cyapa); 608 if (!error) 609 error = cyapa_gen6_ops.initialize(cyapa); 610 if (error) 611 return error; 612 613 error = cyapa_detect(cyapa); 614 if (error) 615 return error; 616 617 /* Power down the device until we need it. */ 618 if (cyapa->operational) 619 cyapa->ops->set_power_mode(cyapa, 620 PWR_MODE_OFF, 0, CYAPA_PM_ACTIVE); 621 622 return 0; 623 } 624 625 static int cyapa_reinitialize(struct cyapa *cyapa) 626 { 627 struct device *dev = &cyapa->client->dev; 628 struct input_dev *input = cyapa->input; 629 int error; 630 631 if (pm_runtime_enabled(dev)) 632 pm_runtime_disable(dev); 633 634 /* Avoid command failures when TP was in OFF state. */ 635 if (cyapa->operational) 636 cyapa->ops->set_power_mode(cyapa, 637 PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE); 638 639 error = cyapa_detect(cyapa); 640 if (error) 641 goto out; 642 643 if (!input && cyapa->operational) { 644 error = cyapa_create_input_dev(cyapa); 645 if (error) { 646 dev_err(dev, "create input_dev instance failed: %d\n", 647 error); 648 goto out; 649 } 650 } 651 652 out: 653 if (!input || !input_device_enabled(input)) { 654 /* Reset to power OFF state to save power when no user open. */ 655 if (cyapa->operational) 656 cyapa->ops->set_power_mode(cyapa, 657 PWR_MODE_OFF, 0, CYAPA_PM_DEACTIVE); 658 } else if (!error && cyapa->operational) { 659 /* 660 * Make sure only enable runtime PM when device is 661 * in operational mode and input->users > 0. 662 */ 663 pm_runtime_set_active(dev); 664 pm_runtime_enable(dev); 665 666 pm_runtime_get_sync(dev); 667 pm_runtime_put_sync_autosuspend(dev); 668 } 669 670 return error; 671 } 672 673 static irqreturn_t cyapa_irq(int irq, void *dev_id) 674 { 675 struct cyapa *cyapa = dev_id; 676 struct device *dev = &cyapa->client->dev; 677 int error; 678 679 if (device_may_wakeup(dev)) 680 pm_wakeup_event(dev, 0); 681 682 /* Interrupt event can be caused by host command to trackpad device. */ 683 if (cyapa->ops->irq_cmd_handler(cyapa)) { 684 /* 685 * Interrupt event maybe from trackpad device input reporting. 686 */ 687 if (!cyapa->input) { 688 /* 689 * Still in probing or in firmware image 690 * updating or reading. 691 */ 692 cyapa->ops->sort_empty_output_data(cyapa, 693 NULL, NULL, NULL); 694 goto out; 695 } 696 697 if (cyapa->operational) { 698 error = cyapa->ops->irq_handler(cyapa); 699 700 /* 701 * Apply runtime power management to touch report event 702 * except the events caused by the command responses. 703 * Note: 704 * It will introduce about 20~40 ms additional delay 705 * time in receiving for first valid touch report data. 706 * The time is used to execute device runtime resume 707 * process. 708 */ 709 pm_runtime_get_sync(dev); 710 pm_runtime_put_sync_autosuspend(dev); 711 } 712 713 if (!cyapa->operational || error) { 714 if (!mutex_trylock(&cyapa->state_sync_lock)) { 715 cyapa->ops->sort_empty_output_data(cyapa, 716 NULL, NULL, NULL); 717 goto out; 718 } 719 cyapa_reinitialize(cyapa); 720 mutex_unlock(&cyapa->state_sync_lock); 721 } 722 } 723 724 out: 725 return IRQ_HANDLED; 726 } 727 728 /* 729 ************************************************************** 730 * sysfs interface 731 ************************************************************** 732 */ 733 #ifdef CONFIG_PM_SLEEP 734 static ssize_t cyapa_show_suspend_scanrate(struct device *dev, 735 struct device_attribute *attr, 736 char *buf) 737 { 738 struct cyapa *cyapa = dev_get_drvdata(dev); 739 u8 pwr_cmd; 740 u16 sleep_time; 741 int len; 742 int error; 743 744 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 745 if (error) 746 return error; 747 748 pwr_cmd = cyapa->suspend_power_mode; 749 sleep_time = cyapa->suspend_sleep_time; 750 751 mutex_unlock(&cyapa->state_sync_lock); 752 753 switch (pwr_cmd) { 754 case PWR_MODE_BTN_ONLY: 755 len = sysfs_emit(buf, "%s\n", BTN_ONLY_MODE_NAME); 756 break; 757 758 case PWR_MODE_OFF: 759 len = sysfs_emit(buf, "%s\n", OFF_MODE_NAME); 760 break; 761 762 default: 763 len = sysfs_emit(buf, "%u\n", 764 cyapa->gen == CYAPA_GEN3 ? 765 cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : 766 sleep_time); 767 break; 768 } 769 770 return len; 771 } 772 773 static ssize_t cyapa_update_suspend_scanrate(struct device *dev, 774 struct device_attribute *attr, 775 const char *buf, size_t count) 776 { 777 struct cyapa *cyapa = dev_get_drvdata(dev); 778 u16 sleep_time; 779 int error; 780 781 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 782 if (error) 783 return error; 784 785 if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) { 786 cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY; 787 } else if (sysfs_streq(buf, OFF_MODE_NAME)) { 788 cyapa->suspend_power_mode = PWR_MODE_OFF; 789 } else if (!kstrtou16(buf, 10, &sleep_time)) { 790 cyapa->suspend_sleep_time = min_t(u16, sleep_time, 1000); 791 cyapa->suspend_power_mode = 792 cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time); 793 } else { 794 count = -EINVAL; 795 } 796 797 mutex_unlock(&cyapa->state_sync_lock); 798 799 return count; 800 } 801 802 static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR, 803 cyapa_show_suspend_scanrate, 804 cyapa_update_suspend_scanrate); 805 806 static struct attribute *cyapa_power_wakeup_entries[] = { 807 &dev_attr_suspend_scanrate_ms.attr, 808 NULL, 809 }; 810 811 static const struct attribute_group cyapa_power_wakeup_group = { 812 .name = power_group_name, 813 .attrs = cyapa_power_wakeup_entries, 814 }; 815 816 static void cyapa_remove_power_wakeup_group(void *data) 817 { 818 struct cyapa *cyapa = data; 819 820 sysfs_unmerge_group(&cyapa->client->dev.kobj, 821 &cyapa_power_wakeup_group); 822 } 823 824 static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) 825 { 826 struct i2c_client *client = cyapa->client; 827 struct device *dev = &client->dev; 828 int error; 829 830 if (device_can_wakeup(dev)) { 831 error = sysfs_merge_group(&dev->kobj, 832 &cyapa_power_wakeup_group); 833 if (error) { 834 dev_err(dev, "failed to add power wakeup group: %d\n", 835 error); 836 return error; 837 } 838 839 error = devm_add_action_or_reset(dev, 840 cyapa_remove_power_wakeup_group, cyapa); 841 if (error) { 842 dev_err(dev, "failed to add power cleanup action: %d\n", 843 error); 844 return error; 845 } 846 } 847 848 return 0; 849 } 850 #else 851 static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) 852 { 853 return 0; 854 } 855 #endif /* CONFIG_PM_SLEEP */ 856 857 #ifdef CONFIG_PM 858 static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev, 859 struct device_attribute *attr, 860 char *buf) 861 { 862 struct cyapa *cyapa = dev_get_drvdata(dev); 863 u8 pwr_cmd; 864 u16 sleep_time; 865 int error; 866 867 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 868 if (error) 869 return error; 870 871 pwr_cmd = cyapa->runtime_suspend_power_mode; 872 sleep_time = cyapa->runtime_suspend_sleep_time; 873 874 mutex_unlock(&cyapa->state_sync_lock); 875 876 return sysfs_emit(buf, "%u\n", 877 cyapa->gen == CYAPA_GEN3 ? 878 cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : 879 sleep_time); 880 } 881 882 static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev, 883 struct device_attribute *attr, 884 const char *buf, size_t count) 885 { 886 struct cyapa *cyapa = dev_get_drvdata(dev); 887 u16 time; 888 int error; 889 890 if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) { 891 dev_err(dev, "invalid runtime suspend scanrate ms parameter\n"); 892 return -EINVAL; 893 } 894 895 /* 896 * When the suspend scanrate is changed, pm_runtime_get to resume 897 * a potentially suspended device, update to the new pwr_cmd 898 * and then pm_runtime_put to suspend into the new power mode. 899 */ 900 pm_runtime_get_sync(dev); 901 902 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 903 if (error) 904 return error; 905 906 cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000); 907 cyapa->runtime_suspend_power_mode = 908 cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time); 909 910 mutex_unlock(&cyapa->state_sync_lock); 911 912 pm_runtime_put_sync_autosuspend(dev); 913 914 return count; 915 } 916 917 static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR, 918 cyapa_show_rt_suspend_scanrate, 919 cyapa_update_rt_suspend_scanrate); 920 921 static struct attribute *cyapa_power_runtime_entries[] = { 922 &dev_attr_runtime_suspend_scanrate_ms.attr, 923 NULL, 924 }; 925 926 static const struct attribute_group cyapa_power_runtime_group = { 927 .name = power_group_name, 928 .attrs = cyapa_power_runtime_entries, 929 }; 930 931 static void cyapa_remove_power_runtime_group(void *data) 932 { 933 struct cyapa *cyapa = data; 934 935 sysfs_unmerge_group(&cyapa->client->dev.kobj, 936 &cyapa_power_runtime_group); 937 } 938 939 static int cyapa_start_runtime(struct cyapa *cyapa) 940 { 941 struct device *dev = &cyapa->client->dev; 942 int error; 943 944 cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE; 945 cyapa->runtime_suspend_sleep_time = 946 cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode); 947 948 error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group); 949 if (error) { 950 dev_err(dev, 951 "failed to create power runtime group: %d\n", error); 952 return error; 953 } 954 955 error = devm_add_action_or_reset(dev, cyapa_remove_power_runtime_group, 956 cyapa); 957 if (error) { 958 dev_err(dev, 959 "failed to add power runtime cleanup action: %d\n", 960 error); 961 return error; 962 } 963 964 /* runtime is enabled until device is operational and opened. */ 965 pm_runtime_set_suspended(dev); 966 pm_runtime_use_autosuspend(dev); 967 pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY); 968 969 return 0; 970 } 971 #else 972 static inline int cyapa_start_runtime(struct cyapa *cyapa) 973 { 974 return 0; 975 } 976 #endif /* CONFIG_PM */ 977 978 static ssize_t cyapa_show_fm_ver(struct device *dev, 979 struct device_attribute *attr, char *buf) 980 { 981 int error; 982 struct cyapa *cyapa = dev_get_drvdata(dev); 983 984 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 985 if (error) 986 return error; 987 error = sysfs_emit(buf, "%d.%d\n", 988 cyapa->fw_maj_ver, cyapa->fw_min_ver); 989 mutex_unlock(&cyapa->state_sync_lock); 990 return error; 991 } 992 993 static ssize_t cyapa_show_product_id(struct device *dev, 994 struct device_attribute *attr, char *buf) 995 { 996 struct cyapa *cyapa = dev_get_drvdata(dev); 997 int size; 998 int error; 999 1000 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1001 if (error) 1002 return error; 1003 size = sysfs_emit(buf, "%s\n", cyapa->product_id); 1004 mutex_unlock(&cyapa->state_sync_lock); 1005 return size; 1006 } 1007 1008 static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name) 1009 { 1010 struct device *dev = &cyapa->client->dev; 1011 const struct firmware *fw; 1012 int error; 1013 1014 error = request_firmware(&fw, fw_name, dev); 1015 if (error) { 1016 dev_err(dev, "Could not load firmware from %s: %d\n", 1017 fw_name, error); 1018 return error; 1019 } 1020 1021 error = cyapa->ops->check_fw(cyapa, fw); 1022 if (error) { 1023 dev_err(dev, "Invalid CYAPA firmware image: %s\n", 1024 fw_name); 1025 goto done; 1026 } 1027 1028 /* 1029 * Resume the potentially suspended device because doing FW 1030 * update on a device not in the FULL mode has a chance to 1031 * fail. 1032 */ 1033 pm_runtime_get_sync(dev); 1034 1035 /* Require IRQ support for firmware update commands. */ 1036 cyapa_enable_irq_for_cmd(cyapa); 1037 1038 error = cyapa->ops->bl_enter(cyapa); 1039 if (error) { 1040 dev_err(dev, "bl_enter failed, %d\n", error); 1041 goto err_detect; 1042 } 1043 1044 error = cyapa->ops->bl_activate(cyapa); 1045 if (error) { 1046 dev_err(dev, "bl_activate failed, %d\n", error); 1047 goto err_detect; 1048 } 1049 1050 error = cyapa->ops->bl_initiate(cyapa, fw); 1051 if (error) { 1052 dev_err(dev, "bl_initiate failed, %d\n", error); 1053 goto err_detect; 1054 } 1055 1056 error = cyapa->ops->update_fw(cyapa, fw); 1057 if (error) { 1058 dev_err(dev, "update_fw failed, %d\n", error); 1059 goto err_detect; 1060 } 1061 1062 err_detect: 1063 cyapa_disable_irq_for_cmd(cyapa); 1064 pm_runtime_put_noidle(dev); 1065 1066 done: 1067 release_firmware(fw); 1068 return error; 1069 } 1070 1071 static ssize_t cyapa_update_fw_store(struct device *dev, 1072 struct device_attribute *attr, 1073 const char *buf, size_t count) 1074 { 1075 struct cyapa *cyapa = dev_get_drvdata(dev); 1076 char fw_name[NAME_MAX]; 1077 int ret, error; 1078 1079 if (!count || count >= NAME_MAX) { 1080 dev_err(dev, "Bad file name size\n"); 1081 return -EINVAL; 1082 } 1083 1084 memcpy(fw_name, buf, count); 1085 if (fw_name[count - 1] == '\n') 1086 fw_name[count - 1] = '\0'; 1087 else 1088 fw_name[count] = '\0'; 1089 1090 if (cyapa->input) { 1091 /* 1092 * Force the input device to be registered after the firmware 1093 * image is updated, so if the corresponding parameters updated 1094 * in the new firmware image can taken effect immediately. 1095 */ 1096 input_unregister_device(cyapa->input); 1097 cyapa->input = NULL; 1098 } 1099 1100 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1101 if (error) { 1102 /* 1103 * Whatever, do reinitialize to try to recover TP state to 1104 * previous state just as it entered fw update entrance. 1105 */ 1106 cyapa_reinitialize(cyapa); 1107 return error; 1108 } 1109 1110 error = cyapa_firmware(cyapa, fw_name); 1111 if (error) 1112 dev_err(dev, "firmware update failed: %d\n", error); 1113 else 1114 dev_dbg(dev, "firmware update successfully done.\n"); 1115 1116 /* 1117 * Re-detect trackpad device states because firmware update process 1118 * will reset trackpad device into bootloader mode. 1119 */ 1120 ret = cyapa_reinitialize(cyapa); 1121 if (ret) { 1122 dev_err(dev, "failed to re-detect after updated: %d\n", ret); 1123 error = error ? error : ret; 1124 } 1125 1126 mutex_unlock(&cyapa->state_sync_lock); 1127 1128 return error ? error : count; 1129 } 1130 1131 static ssize_t cyapa_calibrate_store(struct device *dev, 1132 struct device_attribute *attr, 1133 const char *buf, size_t count) 1134 { 1135 struct cyapa *cyapa = dev_get_drvdata(dev); 1136 int error; 1137 1138 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1139 if (error) 1140 return error; 1141 1142 if (cyapa->operational) { 1143 cyapa_enable_irq_for_cmd(cyapa); 1144 error = cyapa->ops->calibrate_store(dev, attr, buf, count); 1145 cyapa_disable_irq_for_cmd(cyapa); 1146 } else { 1147 error = -EBUSY; /* Still running in bootloader mode. */ 1148 } 1149 1150 mutex_unlock(&cyapa->state_sync_lock); 1151 return error < 0 ? error : count; 1152 } 1153 1154 static ssize_t cyapa_show_baseline(struct device *dev, 1155 struct device_attribute *attr, char *buf) 1156 { 1157 struct cyapa *cyapa = dev_get_drvdata(dev); 1158 ssize_t error; 1159 1160 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1161 if (error) 1162 return error; 1163 1164 if (cyapa->operational) { 1165 cyapa_enable_irq_for_cmd(cyapa); 1166 error = cyapa->ops->show_baseline(dev, attr, buf); 1167 cyapa_disable_irq_for_cmd(cyapa); 1168 } else { 1169 error = -EBUSY; /* Still running in bootloader mode. */ 1170 } 1171 1172 mutex_unlock(&cyapa->state_sync_lock); 1173 return error; 1174 } 1175 1176 static char *cyapa_state_to_string(struct cyapa *cyapa) 1177 { 1178 switch (cyapa->state) { 1179 case CYAPA_STATE_BL_BUSY: 1180 return "bootloader busy"; 1181 case CYAPA_STATE_BL_IDLE: 1182 return "bootloader idle"; 1183 case CYAPA_STATE_BL_ACTIVE: 1184 return "bootloader active"; 1185 case CYAPA_STATE_GEN5_BL: 1186 case CYAPA_STATE_GEN6_BL: 1187 return "bootloader"; 1188 case CYAPA_STATE_OP: 1189 case CYAPA_STATE_GEN5_APP: 1190 case CYAPA_STATE_GEN6_APP: 1191 return "operational"; /* Normal valid state. */ 1192 default: 1193 return "invalid mode"; 1194 } 1195 } 1196 1197 static ssize_t cyapa_show_mode(struct device *dev, 1198 struct device_attribute *attr, char *buf) 1199 { 1200 struct cyapa *cyapa = dev_get_drvdata(dev); 1201 int size; 1202 int error; 1203 1204 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1205 if (error) 1206 return error; 1207 1208 size = sysfs_emit(buf, "gen%d %s\n", 1209 cyapa->gen, cyapa_state_to_string(cyapa)); 1210 1211 mutex_unlock(&cyapa->state_sync_lock); 1212 return size; 1213 } 1214 1215 static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL); 1216 static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL); 1217 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store); 1218 static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL); 1219 static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store); 1220 static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL); 1221 1222 static struct attribute *cyapa_attrs[] = { 1223 &dev_attr_firmware_version.attr, 1224 &dev_attr_product_id.attr, 1225 &dev_attr_update_fw.attr, 1226 &dev_attr_baseline.attr, 1227 &dev_attr_calibrate.attr, 1228 &dev_attr_mode.attr, 1229 NULL, 1230 }; 1231 ATTRIBUTE_GROUPS(cyapa); 1232 1233 static void cyapa_disable_regulator(void *data) 1234 { 1235 struct cyapa *cyapa = data; 1236 1237 regulator_disable(cyapa->vcc); 1238 } 1239 1240 static int cyapa_probe(struct i2c_client *client) 1241 { 1242 struct device *dev = &client->dev; 1243 struct cyapa *cyapa; 1244 u8 adapter_func; 1245 union i2c_smbus_data dummy; 1246 int error; 1247 1248 adapter_func = cyapa_check_adapter_functionality(client); 1249 if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) { 1250 dev_err(dev, "not a supported I2C/SMBus adapter\n"); 1251 return -EIO; 1252 } 1253 1254 /* Make sure there is something at this address */ 1255 if (i2c_smbus_xfer(client->adapter, client->addr, 0, 1256 I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) 1257 return -ENODEV; 1258 1259 cyapa = devm_kzalloc_obj(dev, struct cyapa); 1260 if (!cyapa) 1261 return -ENOMEM; 1262 1263 /* i2c isn't supported, use smbus */ 1264 if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS) 1265 cyapa->smbus = true; 1266 1267 cyapa->client = client; 1268 i2c_set_clientdata(client, cyapa); 1269 sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr, 1270 client->addr); 1271 1272 cyapa->vcc = devm_regulator_get(dev, "vcc"); 1273 if (IS_ERR(cyapa->vcc)) { 1274 error = PTR_ERR(cyapa->vcc); 1275 dev_err(dev, "failed to get vcc regulator: %d\n", error); 1276 return error; 1277 } 1278 1279 error = regulator_enable(cyapa->vcc); 1280 if (error) { 1281 dev_err(dev, "failed to enable regulator: %d\n", error); 1282 return error; 1283 } 1284 1285 error = devm_add_action_or_reset(dev, cyapa_disable_regulator, cyapa); 1286 if (error) { 1287 dev_err(dev, "failed to add disable regulator action: %d\n", 1288 error); 1289 return error; 1290 } 1291 1292 error = cyapa_initialize(cyapa); 1293 if (error) { 1294 dev_err(dev, "failed to detect and initialize tp device.\n"); 1295 return error; 1296 } 1297 1298 error = cyapa_prepare_wakeup_controls(cyapa); 1299 if (error) { 1300 dev_err(dev, "failed to prepare wakeup controls: %d\n", error); 1301 return error; 1302 } 1303 1304 error = cyapa_start_runtime(cyapa); 1305 if (error) { 1306 dev_err(dev, "failed to start pm_runtime: %d\n", error); 1307 return error; 1308 } 1309 1310 error = devm_request_threaded_irq(dev, client->irq, 1311 NULL, cyapa_irq, 1312 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 1313 "cyapa", cyapa); 1314 if (error) { 1315 dev_err(dev, "failed to request threaded irq: %d\n", error); 1316 return error; 1317 } 1318 1319 /* Disable IRQ until the device is opened */ 1320 disable_irq(client->irq); 1321 1322 /* 1323 * Register the device in the input subsystem when it's operational. 1324 * Otherwise, keep in this driver, so it can be be recovered or updated 1325 * through the sysfs mode and update_fw interfaces by user or apps. 1326 */ 1327 if (cyapa->operational) { 1328 error = cyapa_create_input_dev(cyapa); 1329 if (error) { 1330 dev_err(dev, "create input_dev instance failed: %d\n", 1331 error); 1332 return error; 1333 } 1334 } 1335 1336 return 0; 1337 } 1338 1339 static int cyapa_suspend(struct device *dev) 1340 { 1341 struct i2c_client *client = to_i2c_client(dev); 1342 struct cyapa *cyapa = i2c_get_clientdata(client); 1343 u8 power_mode; 1344 int error; 1345 1346 error = mutex_lock_interruptible(&cyapa->input->mutex); 1347 if (error) 1348 return error; 1349 1350 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1351 if (error) { 1352 mutex_unlock(&cyapa->input->mutex); 1353 return error; 1354 } 1355 1356 /* 1357 * Runtime PM is enable only when device is in operational mode and 1358 * users in use, so need check it before disable it to 1359 * avoid unbalance warning. 1360 */ 1361 if (pm_runtime_enabled(dev)) 1362 pm_runtime_disable(dev); 1363 disable_irq(client->irq); 1364 1365 /* 1366 * Set trackpad device to idle mode if wakeup is allowed, 1367 * otherwise turn off. 1368 */ 1369 if (cyapa->operational) { 1370 power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode 1371 : PWR_MODE_OFF; 1372 error = cyapa->ops->set_power_mode(cyapa, power_mode, 1373 cyapa->suspend_sleep_time, CYAPA_PM_SUSPEND); 1374 if (error) 1375 dev_err(dev, "suspend set power mode failed: %d\n", 1376 error); 1377 } 1378 1379 /* 1380 * Disable proximity interrupt when system idle, want true touch to 1381 * wake the system. 1382 */ 1383 if (cyapa->dev_pwr_mode != PWR_MODE_OFF) 1384 cyapa->ops->set_proximity(cyapa, false); 1385 1386 if (device_may_wakeup(dev)) 1387 cyapa->irq_wake = (enable_irq_wake(client->irq) == 0); 1388 1389 mutex_unlock(&cyapa->state_sync_lock); 1390 mutex_unlock(&cyapa->input->mutex); 1391 1392 return 0; 1393 } 1394 1395 static int cyapa_resume(struct device *dev) 1396 { 1397 struct i2c_client *client = to_i2c_client(dev); 1398 struct cyapa *cyapa = i2c_get_clientdata(client); 1399 int error; 1400 1401 mutex_lock(&cyapa->input->mutex); 1402 mutex_lock(&cyapa->state_sync_lock); 1403 1404 if (device_may_wakeup(dev) && cyapa->irq_wake) { 1405 disable_irq_wake(client->irq); 1406 cyapa->irq_wake = false; 1407 } 1408 1409 /* 1410 * Update device states and runtime PM states. 1411 * Re-Enable proximity interrupt after enter operational mode. 1412 */ 1413 error = cyapa_reinitialize(cyapa); 1414 if (error) 1415 dev_warn(dev, "failed to reinitialize TP device: %d\n", error); 1416 1417 enable_irq(client->irq); 1418 1419 mutex_unlock(&cyapa->state_sync_lock); 1420 mutex_unlock(&cyapa->input->mutex); 1421 return 0; 1422 } 1423 1424 static int cyapa_runtime_suspend(struct device *dev) 1425 { 1426 struct cyapa *cyapa = dev_get_drvdata(dev); 1427 int error; 1428 1429 error = cyapa->ops->set_power_mode(cyapa, 1430 cyapa->runtime_suspend_power_mode, 1431 cyapa->runtime_suspend_sleep_time, 1432 CYAPA_PM_RUNTIME_SUSPEND); 1433 if (error) 1434 dev_warn(dev, "runtime suspend failed: %d\n", error); 1435 1436 return 0; 1437 } 1438 1439 static int cyapa_runtime_resume(struct device *dev) 1440 { 1441 struct cyapa *cyapa = dev_get_drvdata(dev); 1442 int error; 1443 1444 error = cyapa->ops->set_power_mode(cyapa, 1445 PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_RUNTIME_RESUME); 1446 if (error) 1447 dev_warn(dev, "runtime resume failed: %d\n", error); 1448 1449 return 0; 1450 } 1451 1452 static const struct dev_pm_ops cyapa_pm_ops = { 1453 SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume) 1454 RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL) 1455 }; 1456 1457 static const struct i2c_device_id cyapa_id_table[] = { 1458 { .name = "cyapa" }, 1459 { } 1460 }; 1461 MODULE_DEVICE_TABLE(i2c, cyapa_id_table); 1462 1463 #ifdef CONFIG_ACPI 1464 static const struct acpi_device_id cyapa_acpi_id[] = { 1465 { .id = "CYAP0000" }, /* Gen3 trackpad with 0x67 I2C address. */ 1466 { .id = "CYAP0001" }, /* Gen5 trackpad with 0x24 I2C address. */ 1467 { .id = "CYAP0002" }, /* Gen6 trackpad with 0x24 I2C address. */ 1468 { } 1469 }; 1470 MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id); 1471 #endif 1472 1473 #ifdef CONFIG_OF 1474 static const struct of_device_id cyapa_of_match[] = { 1475 { .compatible = "cypress,cyapa" }, 1476 { /* sentinel */ } 1477 }; 1478 MODULE_DEVICE_TABLE(of, cyapa_of_match); 1479 #endif 1480 1481 static struct i2c_driver cyapa_driver = { 1482 .driver = { 1483 .name = "cyapa", 1484 .dev_groups = cyapa_groups, 1485 .pm = pm_ptr(&cyapa_pm_ops), 1486 .acpi_match_table = ACPI_PTR(cyapa_acpi_id), 1487 .of_match_table = of_match_ptr(cyapa_of_match), 1488 }, 1489 1490 .probe = cyapa_probe, 1491 .id_table = cyapa_id_table, 1492 }; 1493 1494 module_i2c_driver(cyapa_driver); 1495 1496 MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver"); 1497 MODULE_AUTHOR("Dudley Du <dudl@cypress.com>"); 1498 MODULE_LICENSE("GPL"); 1499