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 40const char product_id[] = "CYTRA"; 41 42static int cyapa_reinitialize(struct cyapa *cyapa); 43 44bool 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 55bool 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 66static 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 79static 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. */ 91static 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 * @ret: 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 */ 128static 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 148static 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 */ 164static 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 255out_detected: 256 if (cyapa->state <= CYAPA_STATE_BL_BUSY) 257 return -EAGAIN; 258 return 0; 259 260error: 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 */ 279int 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 */ 311static 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 */ 348static 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 368static 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, false); 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_mark_last_busy(dev); 407 pm_runtime_put_sync_autosuspend(dev); 408out: 409 mutex_unlock(&cyapa->state_sync_lock); 410 return error; 411} 412 413static void cyapa_close(struct input_dev *input) 414{ 415 struct cyapa *cyapa = input_get_drvdata(input); 416 struct i2c_client *client = cyapa->client; 417 struct device *dev = &cyapa->client->dev; 418 419 mutex_lock(&cyapa->state_sync_lock); 420 421 disable_irq(client->irq); 422 if (pm_runtime_enabled(dev)) 423 pm_runtime_disable(dev); 424 pm_runtime_set_suspended(dev); 425 426 if (cyapa->operational) 427 cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0, false); 428 429 mutex_unlock(&cyapa->state_sync_lock); 430} 431 432static 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 input->dev.parent = &cyapa->client->dev; 453 454 input->open = cyapa_open; 455 input->close = cyapa_close; 456 457 input_set_drvdata(input, cyapa); 458 459 __set_bit(EV_ABS, input->evbit); 460 461 /* Finger position */ 462 input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0, 463 0); 464 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0, 465 0); 466 input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0); 467 if (cyapa->gen > CYAPA_GEN3) { 468 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 469 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); 470 /* 471 * Orientation is the angle between the vertical axis and 472 * the major axis of the contact ellipse. 473 * The range is -127 to 127. 474 * the positive direction is clockwise form the vertical axis. 475 * If the ellipse of contact degenerates into a circle, 476 * orientation is reported as 0. 477 * 478 * Also, for Gen5 trackpad the accurate of this orientation 479 * value is value + (-30 ~ 30). 480 */ 481 input_set_abs_params(input, ABS_MT_ORIENTATION, 482 -127, 127, 0, 0); 483 } 484 if (cyapa->gen >= CYAPA_GEN5) { 485 input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 486 input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0); 487 input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0); 488 } 489 490 input_abs_set_res(input, ABS_MT_POSITION_X, 491 cyapa->max_abs_x / cyapa->physical_size_x); 492 input_abs_set_res(input, ABS_MT_POSITION_Y, 493 cyapa->max_abs_y / cyapa->physical_size_y); 494 495 if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) 496 __set_bit(BTN_LEFT, input->keybit); 497 if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) 498 __set_bit(BTN_MIDDLE, input->keybit); 499 if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) 500 __set_bit(BTN_RIGHT, input->keybit); 501 502 if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK) 503 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 504 505 /* Handle pointer emulation and unused slots in core */ 506 error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS, 507 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); 508 if (error) { 509 dev_err(dev, "failed to initialize MT slots: %d\n", error); 510 return error; 511 } 512 513 /* Register the device in input subsystem */ 514 error = input_register_device(input); 515 if (error) { 516 dev_err(dev, "failed to register input device: %d\n", error); 517 return error; 518 } 519 520 cyapa->input = input; 521 return 0; 522} 523 524static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa) 525{ 526 struct input_dev *input = cyapa->input; 527 528 if (!input || !input->users) { 529 /* 530 * When input is NULL, TP must be in deep sleep mode. 531 * In this mode, later non-power I2C command will always failed 532 * if not bring it out of deep sleep mode firstly, 533 * so must command TP to active mode here. 534 */ 535 if (!input || cyapa->operational) 536 cyapa->ops->set_power_mode(cyapa, 537 PWR_MODE_FULL_ACTIVE, 0, false); 538 /* Gen3 always using polling mode for command. */ 539 if (cyapa->gen >= CYAPA_GEN5) 540 enable_irq(cyapa->client->irq); 541 } 542} 543 544static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa) 545{ 546 struct input_dev *input = cyapa->input; 547 548 if (!input || !input->users) { 549 if (cyapa->gen >= CYAPA_GEN5) 550 disable_irq(cyapa->client->irq); 551 if (!input || cyapa->operational) 552 cyapa->ops->set_power_mode(cyapa, 553 PWR_MODE_OFF, 0, false); 554 } 555} 556 557/* 558 * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time 559 * 560 * These are helper functions that convert to and from integer idle 561 * times and register settings to write to the PowerMode register. 562 * The trackpad supports between 20ms to 1000ms scan intervals. 563 * The time will be increased in increments of 10ms from 20ms to 100ms. 564 * From 100ms to 1000ms, time will be increased in increments of 20ms. 565 * 566 * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is: 567 * Idle_Command = Idle Time / 10; 568 * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is: 569 * Idle_Command = Idle Time / 20 + 5; 570 */ 571u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time) 572{ 573 u16 encoded_time; 574 575 sleep_time = clamp_val(sleep_time, 20, 1000); 576 encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5; 577 return (encoded_time << 2) & PWR_MODE_MASK; 578} 579 580u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode) 581{ 582 u8 encoded_time = pwr_mode >> 2; 583 584 return (encoded_time < 10) ? encoded_time * 10 585 : (encoded_time - 5) * 20; 586} 587 588/* 0 on driver initialize and detected successfully, negative on failure. */ 589static int cyapa_initialize(struct cyapa *cyapa) 590{ 591 int error = 0; 592 593 cyapa->state = CYAPA_STATE_NO_DEVICE; 594 cyapa->gen = CYAPA_GEN_UNKNOWN; 595 mutex_init(&cyapa->state_sync_lock); 596 597 /* 598 * Set to hard code default, they will be updated with trackpad set 599 * default values after probe and initialized. 600 */ 601 cyapa->suspend_power_mode = PWR_MODE_SLEEP; 602 cyapa->suspend_sleep_time = 603 cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode); 604 605 /* ops.initialize() is aimed to prepare for module communications. */ 606 error = cyapa_gen3_ops.initialize(cyapa); 607 if (!error) 608 error = cyapa_gen5_ops.initialize(cyapa); 609 if (!error) 610 error = cyapa_gen6_ops.initialize(cyapa); 611 if (error) 612 return error; 613 614 error = cyapa_detect(cyapa); 615 if (error) 616 return error; 617 618 /* Power down the device until we need it. */ 619 if (cyapa->operational) 620 cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0, false); 621 622 return 0; 623} 624 625static 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, false); 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 652out: 653 if (!input || !input->users) { 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, false); 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_mark_last_busy(dev); 668 pm_runtime_put_sync_autosuspend(dev); 669 } 670 671 return error; 672} 673 674static irqreturn_t cyapa_irq(int irq, void *dev_id) 675{ 676 struct cyapa *cyapa = dev_id; 677 struct device *dev = &cyapa->client->dev; 678 int error; 679 680 if (device_may_wakeup(dev)) 681 pm_wakeup_event(dev, 0); 682 683 /* Interrupt event can be caused by host command to trackpad device. */ 684 if (cyapa->ops->irq_cmd_handler(cyapa)) { 685 /* 686 * Interrupt event maybe from trackpad device input reporting. 687 */ 688 if (!cyapa->input) { 689 /* 690 * Still in probing or in firmware image 691 * updating or reading. 692 */ 693 cyapa->ops->sort_empty_output_data(cyapa, 694 NULL, NULL, NULL); 695 goto out; 696 } 697 698 if (cyapa->operational) { 699 error = cyapa->ops->irq_handler(cyapa); 700 701 /* 702 * Apply runtime power management to touch report event 703 * except the events caused by the command responses. 704 * Note: 705 * It will introduce about 20~40 ms additional delay 706 * time in receiving for first valid touch report data. 707 * The time is used to execute device runtime resume 708 * process. 709 */ 710 pm_runtime_get_sync(dev); 711 pm_runtime_mark_last_busy(dev); 712 pm_runtime_put_sync_autosuspend(dev); 713 } 714 715 if (!cyapa->operational || error) { 716 if (!mutex_trylock(&cyapa->state_sync_lock)) { 717 cyapa->ops->sort_empty_output_data(cyapa, 718 NULL, NULL, NULL); 719 goto out; 720 } 721 cyapa_reinitialize(cyapa); 722 mutex_unlock(&cyapa->state_sync_lock); 723 } 724 } 725 726out: 727 return IRQ_HANDLED; 728} 729 730/* 731 ************************************************************** 732 * sysfs interface 733 ************************************************************** 734*/ 735#ifdef CONFIG_PM_SLEEP 736static ssize_t cyapa_show_suspend_scanrate(struct device *dev, 737 struct device_attribute *attr, 738 char *buf) 739{ 740 struct cyapa *cyapa = dev_get_drvdata(dev); 741 u8 pwr_cmd = cyapa->suspend_power_mode; 742 u16 sleep_time; 743 int len; 744 int error; 745 746 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 747 if (error) 748 return error; 749 750 pwr_cmd = cyapa->suspend_power_mode; 751 sleep_time = cyapa->suspend_sleep_time; 752 753 mutex_unlock(&cyapa->state_sync_lock); 754 755 switch (pwr_cmd) { 756 case PWR_MODE_BTN_ONLY: 757 len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME); 758 break; 759 760 case PWR_MODE_OFF: 761 len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME); 762 break; 763 764 default: 765 len = scnprintf(buf, PAGE_SIZE, "%u\n", 766 cyapa->gen == CYAPA_GEN3 ? 767 cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : 768 sleep_time); 769 break; 770 } 771 772 return len; 773} 774 775static ssize_t cyapa_update_suspend_scanrate(struct device *dev, 776 struct device_attribute *attr, 777 const char *buf, size_t count) 778{ 779 struct cyapa *cyapa = dev_get_drvdata(dev); 780 u16 sleep_time; 781 int error; 782 783 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 784 if (error) 785 return error; 786 787 if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) { 788 cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY; 789 } else if (sysfs_streq(buf, OFF_MODE_NAME)) { 790 cyapa->suspend_power_mode = PWR_MODE_OFF; 791 } else if (!kstrtou16(buf, 10, &sleep_time)) { 792 cyapa->suspend_sleep_time = min_t(u16, sleep_time, 1000); 793 cyapa->suspend_power_mode = 794 cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time); 795 } else { 796 count = -EINVAL; 797 } 798 799 mutex_unlock(&cyapa->state_sync_lock); 800 801 return count; 802} 803 804static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR, 805 cyapa_show_suspend_scanrate, 806 cyapa_update_suspend_scanrate); 807 808static struct attribute *cyapa_power_wakeup_entries[] = { 809 &dev_attr_suspend_scanrate_ms.attr, 810 NULL, 811}; 812 813static const struct attribute_group cyapa_power_wakeup_group = { 814 .name = power_group_name, 815 .attrs = cyapa_power_wakeup_entries, 816}; 817 818static void cyapa_remove_power_wakeup_group(void *data) 819{ 820 struct cyapa *cyapa = data; 821 822 sysfs_unmerge_group(&cyapa->client->dev.kobj, 823 &cyapa_power_wakeup_group); 824} 825 826static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) 827{ 828 struct i2c_client *client = cyapa->client; 829 struct device *dev = &client->dev; 830 int error; 831 832 if (device_can_wakeup(dev)) { 833 error = sysfs_merge_group(&client->dev.kobj, 834 &cyapa_power_wakeup_group); 835 if (error) { 836 dev_err(dev, "failed to add power wakeup group: %d\n", 837 error); 838 return error; 839 } 840 841 error = devm_add_action(dev, 842 cyapa_remove_power_wakeup_group, cyapa); 843 if (error) { 844 cyapa_remove_power_wakeup_group(cyapa); 845 dev_err(dev, "failed to add power cleanup action: %d\n", 846 error); 847 return error; 848 } 849 } 850 851 return 0; 852} 853#else 854static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) 855{ 856 return 0; 857} 858#endif /* CONFIG_PM_SLEEP */ 859 860#ifdef CONFIG_PM 861static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev, 862 struct device_attribute *attr, 863 char *buf) 864{ 865 struct cyapa *cyapa = dev_get_drvdata(dev); 866 u8 pwr_cmd; 867 u16 sleep_time; 868 int error; 869 870 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 871 if (error) 872 return error; 873 874 pwr_cmd = cyapa->runtime_suspend_power_mode; 875 sleep_time = cyapa->runtime_suspend_sleep_time; 876 877 mutex_unlock(&cyapa->state_sync_lock); 878 879 return scnprintf(buf, PAGE_SIZE, "%u\n", 880 cyapa->gen == CYAPA_GEN3 ? 881 cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : 882 sleep_time); 883} 884 885static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev, 886 struct device_attribute *attr, 887 const char *buf, size_t count) 888{ 889 struct cyapa *cyapa = dev_get_drvdata(dev); 890 u16 time; 891 int error; 892 893 if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) { 894 dev_err(dev, "invalid runtime suspend scanrate ms parameter\n"); 895 return -EINVAL; 896 } 897 898 /* 899 * When the suspend scanrate is changed, pm_runtime_get to resume 900 * a potentially suspended device, update to the new pwr_cmd 901 * and then pm_runtime_put to suspend into the new power mode. 902 */ 903 pm_runtime_get_sync(dev); 904 905 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 906 if (error) 907 return error; 908 909 cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000); 910 cyapa->runtime_suspend_power_mode = 911 cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time); 912 913 mutex_unlock(&cyapa->state_sync_lock); 914 915 pm_runtime_put_sync_autosuspend(dev); 916 917 return count; 918} 919 920static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR, 921 cyapa_show_rt_suspend_scanrate, 922 cyapa_update_rt_suspend_scanrate); 923 924static struct attribute *cyapa_power_runtime_entries[] = { 925 &dev_attr_runtime_suspend_scanrate_ms.attr, 926 NULL, 927}; 928 929static const struct attribute_group cyapa_power_runtime_group = { 930 .name = power_group_name, 931 .attrs = cyapa_power_runtime_entries, 932}; 933 934static void cyapa_remove_power_runtime_group(void *data) 935{ 936 struct cyapa *cyapa = data; 937 938 sysfs_unmerge_group(&cyapa->client->dev.kobj, 939 &cyapa_power_runtime_group); 940} 941 942static int cyapa_start_runtime(struct cyapa *cyapa) 943{ 944 struct device *dev = &cyapa->client->dev; 945 int error; 946 947 cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE; 948 cyapa->runtime_suspend_sleep_time = 949 cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode); 950 951 error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group); 952 if (error) { 953 dev_err(dev, 954 "failed to create power runtime group: %d\n", error); 955 return error; 956 } 957 958 error = devm_add_action(dev, cyapa_remove_power_runtime_group, cyapa); 959 if (error) { 960 cyapa_remove_power_runtime_group(cyapa); 961 dev_err(dev, 962 "failed to add power runtime cleanup action: %d\n", 963 error); 964 return error; 965 } 966 967 /* runtime is enabled until device is operational and opened. */ 968 pm_runtime_set_suspended(dev); 969 pm_runtime_use_autosuspend(dev); 970 pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY); 971 972 return 0; 973} 974#else 975static inline int cyapa_start_runtime(struct cyapa *cyapa) 976{ 977 return 0; 978} 979#endif /* CONFIG_PM */ 980 981static ssize_t cyapa_show_fm_ver(struct device *dev, 982 struct device_attribute *attr, char *buf) 983{ 984 int error; 985 struct cyapa *cyapa = dev_get_drvdata(dev); 986 987 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 988 if (error) 989 return error; 990 error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver, 991 cyapa->fw_min_ver); 992 mutex_unlock(&cyapa->state_sync_lock); 993 return error; 994} 995 996static ssize_t cyapa_show_product_id(struct device *dev, 997 struct device_attribute *attr, char *buf) 998{ 999 struct cyapa *cyapa = dev_get_drvdata(dev); 1000 int size; 1001 int error; 1002 1003 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1004 if (error) 1005 return error; 1006 size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id); 1007 mutex_unlock(&cyapa->state_sync_lock); 1008 return size; 1009} 1010 1011static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name) 1012{ 1013 struct device *dev = &cyapa->client->dev; 1014 const struct firmware *fw; 1015 int error; 1016 1017 error = request_firmware(&fw, fw_name, dev); 1018 if (error) { 1019 dev_err(dev, "Could not load firmware from %s: %d\n", 1020 fw_name, error); 1021 return error; 1022 } 1023 1024 error = cyapa->ops->check_fw(cyapa, fw); 1025 if (error) { 1026 dev_err(dev, "Invalid CYAPA firmware image: %s\n", 1027 fw_name); 1028 goto done; 1029 } 1030 1031 /* 1032 * Resume the potentially suspended device because doing FW 1033 * update on a device not in the FULL mode has a chance to 1034 * fail. 1035 */ 1036 pm_runtime_get_sync(dev); 1037 1038 /* Require IRQ support for firmware update commands. */ 1039 cyapa_enable_irq_for_cmd(cyapa); 1040 1041 error = cyapa->ops->bl_enter(cyapa); 1042 if (error) { 1043 dev_err(dev, "bl_enter failed, %d\n", error); 1044 goto err_detect; 1045 } 1046 1047 error = cyapa->ops->bl_activate(cyapa); 1048 if (error) { 1049 dev_err(dev, "bl_activate failed, %d\n", error); 1050 goto err_detect; 1051 } 1052 1053 error = cyapa->ops->bl_initiate(cyapa, fw); 1054 if (error) { 1055 dev_err(dev, "bl_initiate failed, %d\n", error); 1056 goto err_detect; 1057 } 1058 1059 error = cyapa->ops->update_fw(cyapa, fw); 1060 if (error) { 1061 dev_err(dev, "update_fw failed, %d\n", error); 1062 goto err_detect; 1063 } 1064 1065err_detect: 1066 cyapa_disable_irq_for_cmd(cyapa); 1067 pm_runtime_put_noidle(dev); 1068 1069done: 1070 release_firmware(fw); 1071 return error; 1072} 1073 1074static ssize_t cyapa_update_fw_store(struct device *dev, 1075 struct device_attribute *attr, 1076 const char *buf, size_t count) 1077{ 1078 struct cyapa *cyapa = dev_get_drvdata(dev); 1079 char fw_name[NAME_MAX]; 1080 int ret, error; 1081 1082 if (count >= NAME_MAX) { 1083 dev_err(dev, "File name too long\n"); 1084 return -EINVAL; 1085 } 1086 1087 memcpy(fw_name, buf, count); 1088 if (fw_name[count - 1] == '\n') 1089 fw_name[count - 1] = '\0'; 1090 else 1091 fw_name[count] = '\0'; 1092 1093 if (cyapa->input) { 1094 /* 1095 * Force the input device to be registered after the firmware 1096 * image is updated, so if the corresponding parameters updated 1097 * in the new firmware image can taken effect immediately. 1098 */ 1099 input_unregister_device(cyapa->input); 1100 cyapa->input = NULL; 1101 } 1102 1103 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1104 if (error) { 1105 /* 1106 * Whatever, do reinitialize to try to recover TP state to 1107 * previous state just as it entered fw update entrance. 1108 */ 1109 cyapa_reinitialize(cyapa); 1110 return error; 1111 } 1112 1113 error = cyapa_firmware(cyapa, fw_name); 1114 if (error) 1115 dev_err(dev, "firmware update failed: %d\n", error); 1116 else 1117 dev_dbg(dev, "firmware update successfully done.\n"); 1118 1119 /* 1120 * Re-detect trackpad device states because firmware update process 1121 * will reset trackpad device into bootloader mode. 1122 */ 1123 ret = cyapa_reinitialize(cyapa); 1124 if (ret) { 1125 dev_err(dev, "failed to re-detect after updated: %d\n", ret); 1126 error = error ? error : ret; 1127 } 1128 1129 mutex_unlock(&cyapa->state_sync_lock); 1130 1131 return error ? error : count; 1132} 1133 1134static ssize_t cyapa_calibrate_store(struct device *dev, 1135 struct device_attribute *attr, 1136 const char *buf, size_t count) 1137{ 1138 struct cyapa *cyapa = dev_get_drvdata(dev); 1139 int error; 1140 1141 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1142 if (error) 1143 return error; 1144 1145 if (cyapa->operational) { 1146 cyapa_enable_irq_for_cmd(cyapa); 1147 error = cyapa->ops->calibrate_store(dev, attr, buf, count); 1148 cyapa_disable_irq_for_cmd(cyapa); 1149 } else { 1150 error = -EBUSY; /* Still running in bootloader mode. */ 1151 } 1152 1153 mutex_unlock(&cyapa->state_sync_lock); 1154 return error < 0 ? error : count; 1155} 1156 1157static ssize_t cyapa_show_baseline(struct device *dev, 1158 struct device_attribute *attr, char *buf) 1159{ 1160 struct cyapa *cyapa = dev_get_drvdata(dev); 1161 ssize_t error; 1162 1163 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1164 if (error) 1165 return error; 1166 1167 if (cyapa->operational) { 1168 cyapa_enable_irq_for_cmd(cyapa); 1169 error = cyapa->ops->show_baseline(dev, attr, buf); 1170 cyapa_disable_irq_for_cmd(cyapa); 1171 } else { 1172 error = -EBUSY; /* Still running in bootloader mode. */ 1173 } 1174 1175 mutex_unlock(&cyapa->state_sync_lock); 1176 return error; 1177} 1178 1179static char *cyapa_state_to_string(struct cyapa *cyapa) 1180{ 1181 switch (cyapa->state) { 1182 case CYAPA_STATE_BL_BUSY: 1183 return "bootloader busy"; 1184 case CYAPA_STATE_BL_IDLE: 1185 return "bootloader idle"; 1186 case CYAPA_STATE_BL_ACTIVE: 1187 return "bootloader active"; 1188 case CYAPA_STATE_GEN5_BL: 1189 case CYAPA_STATE_GEN6_BL: 1190 return "bootloader"; 1191 case CYAPA_STATE_OP: 1192 case CYAPA_STATE_GEN5_APP: 1193 case CYAPA_STATE_GEN6_APP: 1194 return "operational"; /* Normal valid state. */ 1195 default: 1196 return "invalid mode"; 1197 } 1198} 1199 1200static ssize_t cyapa_show_mode(struct device *dev, 1201 struct device_attribute *attr, char *buf) 1202{ 1203 struct cyapa *cyapa = dev_get_drvdata(dev); 1204 int size; 1205 int error; 1206 1207 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1208 if (error) 1209 return error; 1210 1211 size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n", 1212 cyapa->gen, cyapa_state_to_string(cyapa)); 1213 1214 mutex_unlock(&cyapa->state_sync_lock); 1215 return size; 1216} 1217 1218static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL); 1219static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL); 1220static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store); 1221static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL); 1222static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store); 1223static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL); 1224 1225static struct attribute *cyapa_sysfs_entries[] = { 1226 &dev_attr_firmware_version.attr, 1227 &dev_attr_product_id.attr, 1228 &dev_attr_update_fw.attr, 1229 &dev_attr_baseline.attr, 1230 &dev_attr_calibrate.attr, 1231 &dev_attr_mode.attr, 1232 NULL, 1233}; 1234 1235static const struct attribute_group cyapa_sysfs_group = { 1236 .attrs = cyapa_sysfs_entries, 1237}; 1238 1239static void cyapa_remove_sysfs_group(void *data) 1240{ 1241 struct cyapa *cyapa = data; 1242 1243 sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group); 1244} 1245 1246static void cyapa_disable_regulator(void *data) 1247{ 1248 struct cyapa *cyapa = data; 1249 1250 regulator_disable(cyapa->vcc); 1251} 1252 1253static int cyapa_probe(struct i2c_client *client, 1254 const struct i2c_device_id *dev_id) 1255{ 1256 struct device *dev = &client->dev; 1257 struct cyapa *cyapa; 1258 u8 adapter_func; 1259 union i2c_smbus_data dummy; 1260 int error; 1261 1262 adapter_func = cyapa_check_adapter_functionality(client); 1263 if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) { 1264 dev_err(dev, "not a supported I2C/SMBus adapter\n"); 1265 return -EIO; 1266 } 1267 1268 /* Make sure there is something at this address */ 1269 if (i2c_smbus_xfer(client->adapter, client->addr, 0, 1270 I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) 1271 return -ENODEV; 1272 1273 cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL); 1274 if (!cyapa) 1275 return -ENOMEM; 1276 1277 /* i2c isn't supported, use smbus */ 1278 if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS) 1279 cyapa->smbus = true; 1280 1281 cyapa->client = client; 1282 i2c_set_clientdata(client, cyapa); 1283 sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr, 1284 client->addr); 1285 1286 cyapa->vcc = devm_regulator_get(dev, "vcc"); 1287 if (IS_ERR(cyapa->vcc)) { 1288 error = PTR_ERR(cyapa->vcc); 1289 dev_err(dev, "failed to get vcc regulator: %d\n", error); 1290 return error; 1291 } 1292 1293 error = regulator_enable(cyapa->vcc); 1294 if (error) { 1295 dev_err(dev, "failed to enable regulator: %d\n", error); 1296 return error; 1297 } 1298 1299 error = devm_add_action(dev, cyapa_disable_regulator, cyapa); 1300 if (error) { 1301 cyapa_disable_regulator(cyapa); 1302 dev_err(dev, "failed to add disable regulator action: %d\n", 1303 error); 1304 return error; 1305 } 1306 1307 error = cyapa_initialize(cyapa); 1308 if (error) { 1309 dev_err(dev, "failed to detect and initialize tp device.\n"); 1310 return error; 1311 } 1312 1313 error = sysfs_create_group(&client->dev.kobj, &cyapa_sysfs_group); 1314 if (error) { 1315 dev_err(dev, "failed to create sysfs entries: %d\n", error); 1316 return error; 1317 } 1318 1319 error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa); 1320 if (error) { 1321 cyapa_remove_sysfs_group(cyapa); 1322 dev_err(dev, "failed to add sysfs cleanup action: %d\n", error); 1323 return error; 1324 } 1325 1326 error = cyapa_prepare_wakeup_controls(cyapa); 1327 if (error) { 1328 dev_err(dev, "failed to prepare wakeup controls: %d\n", error); 1329 return error; 1330 } 1331 1332 error = cyapa_start_runtime(cyapa); 1333 if (error) { 1334 dev_err(dev, "failed to start pm_runtime: %d\n", error); 1335 return error; 1336 } 1337 1338 error = devm_request_threaded_irq(dev, client->irq, 1339 NULL, cyapa_irq, 1340 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 1341 "cyapa", cyapa); 1342 if (error) { 1343 dev_err(dev, "failed to request threaded irq: %d\n", error); 1344 return error; 1345 } 1346 1347 /* Disable IRQ until the device is opened */ 1348 disable_irq(client->irq); 1349 1350 /* 1351 * Register the device in the input subsystem when it's operational. 1352 * Otherwise, keep in this driver, so it can be be recovered or updated 1353 * through the sysfs mode and update_fw interfaces by user or apps. 1354 */ 1355 if (cyapa->operational) { 1356 error = cyapa_create_input_dev(cyapa); 1357 if (error) { 1358 dev_err(dev, "create input_dev instance failed: %d\n", 1359 error); 1360 return error; 1361 } 1362 } 1363 1364 return 0; 1365} 1366 1367static int __maybe_unused cyapa_suspend(struct device *dev) 1368{ 1369 struct i2c_client *client = to_i2c_client(dev); 1370 struct cyapa *cyapa = i2c_get_clientdata(client); 1371 u8 power_mode; 1372 int error; 1373 1374 error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1375 if (error) 1376 return error; 1377 1378 /* 1379 * Runtime PM is enable only when device is in operational mode and 1380 * users in use, so need check it before disable it to 1381 * avoid unbalance warning. 1382 */ 1383 if (pm_runtime_enabled(dev)) 1384 pm_runtime_disable(dev); 1385 disable_irq(client->irq); 1386 1387 /* 1388 * Set trackpad device to idle mode if wakeup is allowed, 1389 * otherwise turn off. 1390 */ 1391 if (cyapa->operational) { 1392 power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode 1393 : PWR_MODE_OFF; 1394 error = cyapa->ops->set_power_mode(cyapa, power_mode, 1395 cyapa->suspend_sleep_time, true); 1396 if (error) 1397 dev_err(dev, "suspend set power mode failed: %d\n", 1398 error); 1399 } 1400 1401 /* 1402 * Disable proximity interrupt when system idle, want true touch to 1403 * wake the system. 1404 */ 1405 if (cyapa->dev_pwr_mode != PWR_MODE_OFF) 1406 cyapa->ops->set_proximity(cyapa, false); 1407 1408 if (device_may_wakeup(dev)) 1409 cyapa->irq_wake = (enable_irq_wake(client->irq) == 0); 1410 1411 mutex_unlock(&cyapa->state_sync_lock); 1412 return 0; 1413} 1414 1415static int __maybe_unused cyapa_resume(struct device *dev) 1416{ 1417 struct i2c_client *client = to_i2c_client(dev); 1418 struct cyapa *cyapa = i2c_get_clientdata(client); 1419 int error; 1420 1421 mutex_lock(&cyapa->state_sync_lock); 1422 1423 if (device_may_wakeup(dev) && cyapa->irq_wake) { 1424 disable_irq_wake(client->irq); 1425 cyapa->irq_wake = false; 1426 } 1427 1428 /* 1429 * Update device states and runtime PM states. 1430 * Re-Enable proximity interrupt after enter operational mode. 1431 */ 1432 error = cyapa_reinitialize(cyapa); 1433 if (error) 1434 dev_warn(dev, "failed to reinitialize TP device: %d\n", error); 1435 1436 enable_irq(client->irq); 1437 1438 mutex_unlock(&cyapa->state_sync_lock); 1439 return 0; 1440} 1441 1442static int __maybe_unused cyapa_runtime_suspend(struct device *dev) 1443{ 1444 struct cyapa *cyapa = dev_get_drvdata(dev); 1445 int error; 1446 1447 error = cyapa->ops->set_power_mode(cyapa, 1448 cyapa->runtime_suspend_power_mode, 1449 cyapa->runtime_suspend_sleep_time, 1450 false); 1451 if (error) 1452 dev_warn(dev, "runtime suspend failed: %d\n", error); 1453 1454 return 0; 1455} 1456 1457static int __maybe_unused cyapa_runtime_resume(struct device *dev) 1458{ 1459 struct cyapa *cyapa = dev_get_drvdata(dev); 1460 int error; 1461 1462 error = cyapa->ops->set_power_mode(cyapa, 1463 PWR_MODE_FULL_ACTIVE, 0, false); 1464 if (error) 1465 dev_warn(dev, "runtime resume failed: %d\n", error); 1466 1467 return 0; 1468} 1469 1470static const struct dev_pm_ops cyapa_pm_ops = { 1471 SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume) 1472 SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL) 1473}; 1474 1475static const struct i2c_device_id cyapa_id_table[] = { 1476 { "cyapa", 0 }, 1477 { }, 1478}; 1479MODULE_DEVICE_TABLE(i2c, cyapa_id_table); 1480 1481#ifdef CONFIG_ACPI 1482static const struct acpi_device_id cyapa_acpi_id[] = { 1483 { "CYAP0000", 0 }, /* Gen3 trackpad with 0x67 I2C address. */ 1484 { "CYAP0001", 0 }, /* Gen5 trackpad with 0x24 I2C address. */ 1485 { "CYAP0002", 0 }, /* Gen6 trackpad with 0x24 I2C address. */ 1486 { } 1487}; 1488MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id); 1489#endif 1490 1491#ifdef CONFIG_OF 1492static const struct of_device_id cyapa_of_match[] = { 1493 { .compatible = "cypress,cyapa" }, 1494 { /* sentinel */ } 1495}; 1496MODULE_DEVICE_TABLE(of, cyapa_of_match); 1497#endif 1498 1499static struct i2c_driver cyapa_driver = { 1500 .driver = { 1501 .name = "cyapa", 1502 .pm = &cyapa_pm_ops, 1503 .acpi_match_table = ACPI_PTR(cyapa_acpi_id), 1504 .of_match_table = of_match_ptr(cyapa_of_match), 1505 }, 1506 1507 .probe = cyapa_probe, 1508 .id_table = cyapa_id_table, 1509}; 1510 1511module_i2c_driver(cyapa_driver); 1512 1513MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver"); 1514MODULE_AUTHOR("Dudley Du <dudl@cypress.com>"); 1515MODULE_LICENSE("GPL"); 1516