kernel/drivers/input/mouse/cyapa.c

   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) 2011-2014 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/slab.h>
  25 #include <linux/uaccess.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/acpi.h>
  28 #include "cyapa.h"
  29
  30
  31 #define CYAPA_ADAPTER_FUNC_NONE   0
  32 #define CYAPA_ADAPTER_FUNC_I2C    1
  33 #define CYAPA_ADAPTER_FUNC_SMBUS  2
  34 #define CYAPA_ADAPTER_FUNC_BOTH   3
  35
  36 #define CYAPA_FW_NAME           "cyapa.bin"
  37
  38 const char product_id[] = "CYTRA";
  39
  40 static int cyapa_reinitialize(struct cyapa *cyapa);
  41
  42 static inline bool cyapa_is_bootloader_mode(struct cyapa *cyapa)
  43 {
  44         if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_BL)
  45                 return true;
  46
  47         if (cyapa->gen == CYAPA_GEN3 &&
  48                 cyapa->state >= CYAPA_STATE_BL_BUSY &&
  49                 cyapa->state <= CYAPA_STATE_BL_ACTIVE)
  50                 return true;
  51
  52         return false;
  53 }
  54
  55 static inline bool cyapa_is_operational_mode(struct cyapa *cyapa)
  56 {
  57         if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_APP)
  58                 return true;
  59
  60         if (cyapa->gen == CYAPA_GEN3 && cyapa->state == CYAPA_STATE_OP)
  61                 return true;
  62
  63         return false;
  64 }
  65
  66 /* Returns 0 on success, else negative errno on failure. */
  67 static ssize_t cyapa_i2c_read(struct cyapa *cyapa, u8 reg, size_t len,
  68                                         u8 *values)
  69 {
  70         struct i2c_client *client = cyapa->client;
  71         struct i2c_msg msgs[] = {
  72                 {
  73                         .addr = client->addr,
  74                         .flags = 0,
  75                         .len = 1,
  76                         .buf = &reg,
  77                 },
  78                 {
  79                         .addr = client->addr,
  80                         .flags = I2C_M_RD,
  81                         .len = len,
  82                         .buf = values,
  83                 },
  84         };
  85         int ret;
  86
  87         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
  88
  89         if (ret != ARRAY_SIZE(msgs))
  90                 return ret < 0 ? ret : -EIO;
  91
  92         return 0;
  93 }
  94
  95 /**
  96  * cyapa_i2c_write - Execute i2c block data write operation
  97  * @cyapa: Handle to this driver
  98  * @ret: Offset of the data to written in the register map
  99  * @len: number of bytes to write
 100  * @values: Data to be written
 101  *
 102  * Return negative errno code on error; return zero when success.
 103  */
 104 static int cyapa_i2c_write(struct cyapa *cyapa, u8 reg,
 105                                          size_t len, const void *values)
 106 {
 107         struct i2c_client *client = cyapa->client;
 108         char buf[32];
 109         int ret;
 110
 111         if (len > sizeof(buf) - 1)
 112                 return -ENOMEM;
 113
 114         buf[0] = reg;
 115         memcpy(&buf[1], values, len);
 116
 117         ret = i2c_master_send(client, buf, len + 1);
 118         if (ret != len + 1)
 119                 return ret < 0 ? ret : -EIO;
 120
 121         return 0;
 122 }
 123
 124 static u8 cyapa_check_adapter_functionality(struct i2c_client *client)
 125 {
 126         u8 ret = CYAPA_ADAPTER_FUNC_NONE;
 127
 128         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
 129                 ret |= CYAPA_ADAPTER_FUNC_I2C;
 130         if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 131                                      I2C_FUNC_SMBUS_BLOCK_DATA |
 132                                      I2C_FUNC_SMBUS_I2C_BLOCK))
 133                 ret |= CYAPA_ADAPTER_FUNC_SMBUS;
 134         return ret;
 135 }
 136
 137 /*
 138  * Query device for its current operating state.
 139  */
 140 static int cyapa_get_state(struct cyapa *cyapa)
 141 {
 142         u8 status[BL_STATUS_SIZE];
 143         u8 cmd[32];
 144         /* The i2c address of gen4 and gen5 trackpad device must be even. */
 145         bool even_addr = ((cyapa->client->addr & 0x0001) == 0);
 146         bool smbus = false;
 147         int retries = 2;
 148         int error;
 149
 150         cyapa->state = CYAPA_STATE_NO_DEVICE;
 151
 152         /*
 153          * Get trackpad status by reading 3 registers starting from 0.
 154          * If the device is in the bootloader, this will be BL_HEAD.
 155          * If the device is in operation mode, this will be the DATA regs.
 156          *
 157          */
 158         error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE,
 159                                        status);
 160
 161         /*
 162          * On smbus systems in OP mode, the i2c_reg_read will fail with
 163          * -ETIMEDOUT.  In this case, try again using the smbus equivalent
 164          * command.  This should return a BL_HEAD indicating CYAPA_STATE_OP.
 165          */
 166         if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) {
 167                 if (!even_addr)
 168                         error = cyapa_read_block(cyapa,
 169                                         CYAPA_CMD_BL_STATUS, status);
 170                 smbus = true;
 171         }
 172
 173         if (error != BL_STATUS_SIZE)
 174                 goto error;
 175
 176         /*
 177          * Detect trackpad protocol based on characteristic registers and bits.
 178          */
 179         do {
 180                 cyapa->status[REG_OP_STATUS] = status[REG_OP_STATUS];
 181                 cyapa->status[REG_BL_STATUS] = status[REG_BL_STATUS];
 182                 cyapa->status[REG_BL_ERROR] = status[REG_BL_ERROR];
 183
 184                 if (cyapa->gen == CYAPA_GEN_UNKNOWN ||
 185                                 cyapa->gen == CYAPA_GEN3) {
 186                         error = cyapa_gen3_ops.state_parse(cyapa,
 187                                         status, BL_STATUS_SIZE);
 188                         if (!error)
 189                                 goto out_detected;
 190                 }
 191                 if ((cyapa->gen == CYAPA_GEN_UNKNOWN ||
 192                                 cyapa->gen == CYAPA_GEN5) &&
 193                         !smbus && even_addr) {
 194                         error = cyapa_gen5_ops.state_parse(cyapa,
 195                                         status, BL_STATUS_SIZE);
 196                         if (!error)
 197                                 goto out_detected;
 198                 }
 199
 200                 /*
 201                  * Write 0x00 0x00 to trackpad device to force update its
 202                  * status, then redo the detection again.
 203                  */
 204                 if (!smbus) {
 205                         cmd[0] = 0x00;
 206                         cmd[1] = 0x00;
 207                         error = cyapa_i2c_write(cyapa, 0, 2, cmd);
 208                         if (error)
 209                                 goto error;
 210
 211                         msleep(50);
 212
 213                         error = cyapa_i2c_read(cyapa, BL_HEAD_OFFSET,
 214                                         BL_STATUS_SIZE, status);
 215                         if (error)
 216                                 goto error;
 217                 }
 218         } while (--retries > 0 && !smbus);
 219
 220         goto error;
 221
 222 out_detected:
 223         if (cyapa->state <= CYAPA_STATE_BL_BUSY)
 224                 return -EAGAIN;
 225         return 0;
 226
 227 error:
 228         return (error < 0) ? error : -EAGAIN;
 229 }
 230
 231 /*
 232  * Poll device for its status in a loop, waiting up to timeout for a response.
 233  *
 234  * When the device switches state, it usually takes ~300 ms.
 235  * However, when running a new firmware image, the device must calibrate its
 236  * sensors, which can take as long as 2 seconds.
 237  *
 238  * Note: The timeout has granularity of the polling rate, which is 100 ms.
 239  *
 240  * Returns:
 241  *   0 when the device eventually responds with a valid non-busy state.
 242  *   -ETIMEDOUT if device never responds (too many -EAGAIN)
 243  *   -EAGAIN    if bootload is busy, or unknown state.
 244  *   < 0        other errors
 245  */
 246 int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout)
 247 {
 248         int error;
 249         int tries = timeout / 100;
 250
 251         do {
 252                 error = cyapa_get_state(cyapa);
 253                 if (!error && cyapa->state > CYAPA_STATE_BL_BUSY)
 254                         return 0;
 255
 256                 msleep(100);
 257         } while (tries--);
 258
 259         return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error;
 260 }
 261
 262 /*
 263  * Check if device is operational.
 264  *
 265  * An operational device is responding, has exited bootloader, and has
 266  * firmware supported by this driver.
 267  *
 268  * Returns:
 269  *   -ENODEV no device
 270  *   -EBUSY  no device or in bootloader
 271  *   -EIO    failure while reading from device
 272  *   -ETIMEDOUT timeout failure for bus idle or bus no response
 273  *   -EAGAIN device is still in bootloader
 274  *           if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware
 275  *   -EINVAL device is in operational mode, but not supported by this driver
 276  *   0       device is supported
 277  */
 278 static int cyapa_check_is_operational(struct cyapa *cyapa)
 279 {
 280         int error;
 281
 282         error = cyapa_poll_state(cyapa, 4000);
 283         if (error)
 284                 return error;
 285
 286         switch (cyapa->gen) {
 287         case CYAPA_GEN5:
 288                 cyapa->ops = &cyapa_gen5_ops;
 289                 break;
 290         case CYAPA_GEN3:
 291                 cyapa->ops = &cyapa_gen3_ops;
 292                 break;
 293         default:
 294                 return -ENODEV;
 295         }
 296
 297         error = cyapa->ops->operational_check(cyapa);
 298         if (!error && cyapa_is_operational_mode(cyapa))
 299                 cyapa->operational = true;
 300         else
 301                 cyapa->operational = false;
 302
 303         return error;
 304 }
 305
 306
 307 /*
 308  * Returns 0 on device detected, negative errno on no device detected.
 309  * And when the device is detected and opertaional, it will be reset to
 310  * full power active mode automatically.
 311  */
 312 static int cyapa_detect(struct cyapa *cyapa)
 313 {
 314         struct device *dev = &cyapa->client->dev;
 315         int error;
 316
 317         error = cyapa_check_is_operational(cyapa);
 318         if (error) {
 319                 if (error != -ETIMEDOUT && error != -ENODEV &&
 320                         cyapa_is_bootloader_mode(cyapa)) {
 321                         dev_warn(dev, "device detected but not operational\n");
 322                         return 0;
 323                 }
 324
 325                 dev_err(dev, "no device detected: %d\n", error);
 326                 return error;
 327         }
 328
 329         return 0;
 330 }
 331
 332 static int cyapa_open(struct input_dev *input)
 333 {
 334         struct cyapa *cyapa = input_get_drvdata(input);
 335         struct i2c_client *client = cyapa->client;
 336         int error;
 337
 338         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
 339         if (error)
 340                 return error;
 341
 342         if (cyapa->operational) {
 343                 /*
 344                  * though failed to set active power mode,
 345                  * but still may be able to work in lower scan rate
 346                  * when in operational mode.
 347                  */
 348                 error = cyapa->ops->set_power_mode(cyapa,
 349                                 PWR_MODE_FULL_ACTIVE, 0);
 350                 if (error) {
 351                         dev_warn(&client->dev,
 352                                 "set active power failed: %d\n", error);
 353                         goto out;
 354                 }
 355         } else {
 356                 error = cyapa_reinitialize(cyapa);
 357                 if (error || !cyapa->operational) {
 358                         error = error ? error : -EAGAIN;
 359                         goto out;
 360                 }
 361         }
 362
 363         enable_irq(client->irq);
 364         if (!pm_runtime_enabled(&client->dev)) {
 365                 pm_runtime_set_active(&client->dev);
 366                 pm_runtime_enable(&client->dev);
 367         }
 368 out:
 369         mutex_unlock(&cyapa->state_sync_lock);
 370         return error;
 371 }
 372
 373 static void cyapa_close(struct input_dev *input)
 374 {
 375         struct cyapa *cyapa = input_get_drvdata(input);
 376         struct i2c_client *client = cyapa->client;
 377
 378         mutex_lock(&cyapa->state_sync_lock);
 379
 380         disable_irq(client->irq);
 381         if (pm_runtime_enabled(&client->dev))
 382                 pm_runtime_disable(&client->dev);
 383         pm_runtime_set_suspended(&client->dev);
 384
 385         if (cyapa->operational)
 386                 cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
 387
 388         mutex_unlock(&cyapa->state_sync_lock);
 389 }
 390
 391 static int cyapa_create_input_dev(struct cyapa *cyapa)
 392 {
 393         struct device *dev = &cyapa->client->dev;
 394         struct input_dev *input;
 395         int error;
 396
 397         if (!cyapa->physical_size_x || !cyapa->physical_size_y)
 398                 return -EINVAL;
 399
 400         input = devm_input_allocate_device(dev);
 401         if (!input) {
 402                 dev_err(dev, "failed to allocate memory for input device.\n");
 403                 return -ENOMEM;
 404         }
 405
 406         input->name = CYAPA_NAME;
 407         input->phys = cyapa->phys;
 408         input->id.bustype = BUS_I2C;
 409         input->id.version = 1;
 410         input->id.product = 0;  /* Means any product in eventcomm. */
 411         input->dev.parent = &cyapa->client->dev;
 412
 413         input->open = cyapa_open;
 414         input->close = cyapa_close;
 415
 416         input_set_drvdata(input, cyapa);
 417
 418         __set_bit(EV_ABS, input->evbit);
 419
 420         /* Finger position */
 421         input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0,
 422                              0);
 423         input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0,
 424                              0);
 425         input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0);
 426         if (cyapa->gen > CYAPA_GEN3) {
 427                 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
 428                 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
 429                 /*
 430                  * Orientation is the angle between the vertical axis and
 431                  * the major axis of the contact ellipse.
 432                  * The range is -127 to 127.
 433                  * the positive direction is clockwise form the vertical axis.
 434                  * If the ellipse of contact degenerates into a circle,
 435                  * orientation is reported as 0.
 436                  *
 437                  * Also, for Gen5 trackpad the accurate of this orientation
 438                  * value is value + (-30 ~ 30).
 439                  */
 440                 input_set_abs_params(input, ABS_MT_ORIENTATION,
 441                                 -127, 127, 0, 0);
 442         }
 443         if (cyapa->gen >= CYAPA_GEN5) {
 444                 input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
 445                 input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0);
 446         }
 447
 448         input_abs_set_res(input, ABS_MT_POSITION_X,
 449                           cyapa->max_abs_x / cyapa->physical_size_x);
 450         input_abs_set_res(input, ABS_MT_POSITION_Y,
 451                           cyapa->max_abs_y / cyapa->physical_size_y);
 452
 453         if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK)
 454                 __set_bit(BTN_LEFT, input->keybit);
 455         if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK)
 456                 __set_bit(BTN_MIDDLE, input->keybit);
 457         if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK)
 458                 __set_bit(BTN_RIGHT, input->keybit);
 459
 460         if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK)
 461                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 462
 463         /* Handle pointer emulation and unused slots in core */
 464         error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS,
 465                                     INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED);
 466         if (error) {
 467                 dev_err(dev, "failed to initialize MT slots: %d\n", error);
 468                 return error;
 469         }
 470
 471         /* Register the device in input subsystem */
 472         error = input_register_device(input);
 473         if (error) {
 474                 dev_err(dev, "failed to register input device: %d\n", error);
 475                 return error;
 476         }
 477
 478         cyapa->input = input;
 479         return 0;
 480 }
 481
 482 static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa)
 483 {
 484         struct input_dev *input = cyapa->input;
 485
 486         if (!input || !input->users) {
 487                 /*
 488                  * When input is NULL, TP must be in deep sleep mode.
 489                  * In this mode, later non-power I2C command will always failed
 490                  * if not bring it out of deep sleep mode firstly,
 491                  * so must command TP to active mode here.
 492                  */
 493                 if (!input || cyapa->operational)
 494                         cyapa->ops->set_power_mode(cyapa,
 495                                 PWR_MODE_FULL_ACTIVE, 0);
 496                 /* Gen3 always using polling mode for command. */
 497                 if (cyapa->gen >= CYAPA_GEN5)
 498                         enable_irq(cyapa->client->irq);
 499         }
 500 }
 501
 502 static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa)
 503 {
 504         struct input_dev *input = cyapa->input;
 505
 506         if (!input || !input->users) {
 507                 if (cyapa->gen >= CYAPA_GEN5)
 508                         disable_irq(cyapa->client->irq);
 509                 if (!input || cyapa->operational)
 510                         cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
 511         }
 512 }
 513
 514 /*
 515  * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time
 516  *
 517  * These are helper functions that convert to and from integer idle
 518  * times and register settings to write to the PowerMode register.
 519  * The trackpad supports between 20ms to 1000ms scan intervals.
 520  * The time will be increased in increments of 10ms from 20ms to 100ms.
 521  * From 100ms to 1000ms, time will be increased in increments of 20ms.
 522  *
 523  * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is:
 524  *   Idle_Command = Idle Time / 10;
 525  * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is:
 526  *   Idle_Command = Idle Time / 20 + 5;
 527  */
 528 u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time)
 529 {
 530         u16 encoded_time;
 531
 532         sleep_time = clamp_val(sleep_time, 20, 1000);
 533         encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5;
 534         return (encoded_time << 2) & PWR_MODE_MASK;
 535 }
 536
 537 u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode)
 538 {
 539         u8 encoded_time = pwr_mode >> 2;
 540
 541         return (encoded_time < 10) ? encoded_time * 10
 542                                    : (encoded_time - 5) * 20;
 543 }
 544
 545 /* 0 on driver initialize and detected successfully, negative on failure. */
 546 static int cyapa_initialize(struct cyapa *cyapa)
 547 {
 548         int error = 0;
 549
 550         cyapa->state = CYAPA_STATE_NO_DEVICE;
 551         cyapa->gen = CYAPA_GEN_UNKNOWN;
 552         mutex_init(&cyapa->state_sync_lock);
 553
 554         /*
 555          * Set to hard code default, they will be updated with trackpad set
 556          * default values after probe and initialized.
 557          */
 558         cyapa->suspend_power_mode = PWR_MODE_SLEEP;
 559         cyapa->suspend_sleep_time =
 560                 cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode);
 561
 562         /* ops.initialize() is aimed to prepare for module communications. */
 563         error = cyapa_gen3_ops.initialize(cyapa);
 564         if (!error)
 565                 error = cyapa_gen5_ops.initialize(cyapa);
 566         if (error)
 567                 return error;
 568
 569         error = cyapa_detect(cyapa);
 570         if (error)
 571                 return error;
 572
 573         /* Power down the device until we need it. */
 574         if (cyapa->operational)
 575                 cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
 576
 577         return 0;
 578 }
 579
 580 static int cyapa_reinitialize(struct cyapa *cyapa)
 581 {
 582         struct device *dev = &cyapa->client->dev;
 583         struct input_dev *input = cyapa->input;
 584         int error;
 585
 586         if (pm_runtime_enabled(dev))
 587                 pm_runtime_disable(dev);
 588
 589         /* Avoid command failures when TP was in OFF state. */
 590         if (cyapa->operational)
 591                 cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0);
 592
 593         error = cyapa_detect(cyapa);
 594         if (error)
 595                 goto out;
 596
 597         if (!input && cyapa->operational) {
 598                 error = cyapa_create_input_dev(cyapa);
 599                 if (error) {
 600                         dev_err(dev, "create input_dev instance failed: %d\n",
 601                                         error);
 602                         goto out;
 603                 }
 604         }
 605
 606 out:
 607         if (!input || !input->users) {
 608                 /* Reset to power OFF state to save power when no user open. */
 609                 if (cyapa->operational)
 610                         cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
 611         } else if (!error && cyapa->operational) {
 612                 /*
 613                  * Make sure only enable runtime PM when device is
 614                  * in operational mode and input->users > 0.
 615                  */
 616                 pm_runtime_set_active(dev);
 617                 pm_runtime_enable(dev);
 618         }
 619
 620         return error;
 621 }
 622
 623 static irqreturn_t cyapa_irq(int irq, void *dev_id)
 624 {
 625         struct cyapa *cyapa = dev_id;
 626         struct device *dev = &cyapa->client->dev;
 627
 628         pm_runtime_get_sync(dev);
 629         if (device_may_wakeup(dev))
 630                 pm_wakeup_event(dev, 0);
 631
 632         /* Interrupt event maybe cuased by host command to trackpad device. */
 633         if (cyapa->ops->irq_cmd_handler(cyapa)) {
 634                 /*
 635                  * Interrupt event maybe from trackpad device input reporting.
 636                  */
 637                 if (!cyapa->input) {
 638                         /*
 639                          * Still in probling or in firware image
 640                          * udpating or reading.
 641                          */
 642                         cyapa->ops->sort_empty_output_data(cyapa,
 643                                         NULL, NULL, NULL);
 644                         goto out;
 645                 }
 646
 647                 if (!cyapa->operational || cyapa->ops->irq_handler(cyapa)) {
 648                         if (!mutex_trylock(&cyapa->state_sync_lock)) {
 649                                 cyapa->ops->sort_empty_output_data(cyapa,
 650                                         NULL, NULL, NULL);
 651                                 goto out;
 652                         }
 653                         cyapa_reinitialize(cyapa);
 654                         mutex_unlock(&cyapa->state_sync_lock);
 655                 }
 656         }
 657
 658 out:
 659         pm_runtime_mark_last_busy(dev);
 660         pm_runtime_put_sync_autosuspend(dev);
 661         return IRQ_HANDLED;
 662 }
 663
 664 /*
 665  **************************************************************
 666  * sysfs interface
 667  **************************************************************
 668 */
 669 #ifdef CONFIG_PM_SLEEP
 670 static ssize_t cyapa_show_suspend_scanrate(struct device *dev,
 671                                            struct device_attribute *attr,
 672                                            char *buf)
 673 {
 674         struct cyapa *cyapa = dev_get_drvdata(dev);
 675         u8 pwr_cmd = cyapa->suspend_power_mode;
 676         u16 sleep_time;
 677         int len;
 678         int error;
 679
 680         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
 681         if (error)
 682                 return error;
 683
 684         pwr_cmd = cyapa->suspend_power_mode;
 685         sleep_time = cyapa->suspend_sleep_time;
 686
 687         mutex_unlock(&cyapa->state_sync_lock);
 688
 689         switch (pwr_cmd) {
 690         case PWR_MODE_BTN_ONLY:
 691                 len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME);
 692                 break;
 693
 694         case PWR_MODE_OFF:
 695                 len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME);
 696                 break;
 697
 698         default:
 699                 len = scnprintf(buf, PAGE_SIZE, "%u\n",
 700                                 cyapa->gen == CYAPA_GEN3 ?
 701                                         cyapa_pwr_cmd_to_sleep_time(pwr_cmd) :
 702                                         sleep_time);
 703                 break;
 704         }
 705
 706         return len;
 707 }
 708
 709 static ssize_t cyapa_update_suspend_scanrate(struct device *dev,
 710                                              struct device_attribute *attr,
 711                                              const char *buf, size_t count)
 712 {
 713         struct cyapa *cyapa = dev_get_drvdata(dev);
 714         u16 sleep_time;
 715         int error;
 716
 717         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
 718         if (error)
 719                 return error;
 720
 721         if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) {
 722                 cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY;
 723         } else if (sysfs_streq(buf, OFF_MODE_NAME)) {
 724                 cyapa->suspend_power_mode = PWR_MODE_OFF;
 725         } else if (!kstrtou16(buf, 10, &sleep_time)) {
 726                 cyapa->suspend_sleep_time = min_t(u16, sleep_time, 1000);
 727                 cyapa->suspend_power_mode =
 728                         cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time);
 729         } else {
 730                 count = -EINVAL;
 731         }
 732
 733         mutex_unlock(&cyapa->state_sync_lock);
 734
 735         return count;
 736 }
 737
 738 static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR,
 739                    cyapa_show_suspend_scanrate,
 740                    cyapa_update_suspend_scanrate);
 741
 742 static struct attribute *cyapa_power_wakeup_entries[] = {
 743         &dev_attr_suspend_scanrate_ms.attr,
 744         NULL,
 745 };
 746
 747 static const struct attribute_group cyapa_power_wakeup_group = {
 748         .name = power_group_name,
 749         .attrs = cyapa_power_wakeup_entries,
 750 };
 751
 752 static void cyapa_remove_power_wakeup_group(void *data)
 753 {
 754         struct cyapa *cyapa = data;
 755
 756         sysfs_unmerge_group(&cyapa->client->dev.kobj,
 757                                 &cyapa_power_wakeup_group);
 758 }
 759
 760 static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa)
 761 {
 762         struct i2c_client *client = cyapa->client;
 763         struct device *dev = &client->dev;
 764         int error;
 765
 766         if (device_can_wakeup(dev)) {
 767                 error = sysfs_merge_group(&client->dev.kobj,
 768                                         &cyapa_power_wakeup_group);
 769                 if (error) {
 770                         dev_err(dev, "failed to add power wakeup group: %d\n",
 771                                 error);
 772                         return error;
 773                 }
 774
 775                 error = devm_add_action(dev,
 776                                 cyapa_remove_power_wakeup_group, cyapa);
 777                 if (error) {
 778                         cyapa_remove_power_wakeup_group(cyapa);
 779                         dev_err(dev, "failed to add power cleanup action: %d\n",
 780                                 error);
 781                         return error;
 782                 }
 783         }
 784
 785         return 0;
 786 }
 787 #else
 788 static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa)
 789 {
 790         return 0;
 791 }
 792 #endif /* CONFIG_PM_SLEEP */
 793
 794 #ifdef CONFIG_PM
 795 static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev,
 796                                               struct device_attribute *attr,
 797                                               char *buf)
 798 {
 799         struct cyapa *cyapa = dev_get_drvdata(dev);
 800         u8 pwr_cmd;
 801         u16 sleep_time;
 802         int error;
 803
 804         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
 805         if (error)
 806                 return error;
 807
 808         pwr_cmd = cyapa->runtime_suspend_power_mode;
 809         sleep_time = cyapa->runtime_suspend_sleep_time;
 810
 811         mutex_unlock(&cyapa->state_sync_lock);
 812
 813         return scnprintf(buf, PAGE_SIZE, "%u\n",
 814                          cyapa->gen == CYAPA_GEN3 ?
 815                                 cyapa_pwr_cmd_to_sleep_time(pwr_cmd) :
 816                                 sleep_time);
 817 }
 818
 819 static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev,
 820                                                 struct device_attribute *attr,
 821                                                 const char *buf, size_t count)
 822 {
 823         struct cyapa *cyapa = dev_get_drvdata(dev);
 824         u16 time;
 825         int error;
 826
 827         if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) {
 828                 dev_err(dev, "invalid runtime suspend scanrate ms parameter\n");
 829                 return -EINVAL;
 830         }
 831
 832         /*
 833          * When the suspend scanrate is changed, pm_runtime_get to resume
 834          * a potentially suspended device, update to the new pwr_cmd
 835          * and then pm_runtime_put to suspend into the new power mode.
 836          */
 837         pm_runtime_get_sync(dev);
 838
 839         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
 840         if (error)
 841                 return error;
 842
 843         cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000);
 844         cyapa->runtime_suspend_power_mode =
 845                 cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time);
 846
 847         mutex_unlock(&cyapa->state_sync_lock);
 848
 849         pm_runtime_put_sync_autosuspend(dev);
 850
 851         return count;
 852 }
 853
 854 static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR,
 855                    cyapa_show_rt_suspend_scanrate,
 856                    cyapa_update_rt_suspend_scanrate);
 857
 858 static struct attribute *cyapa_power_runtime_entries[] = {
 859         &dev_attr_runtime_suspend_scanrate_ms.attr,
 860         NULL,
 861 };
 862
 863 static const struct attribute_group cyapa_power_runtime_group = {
 864         .name = power_group_name,
 865         .attrs = cyapa_power_runtime_entries,
 866 };
 867
 868 static void cyapa_remove_power_runtime_group(void *data)
 869 {
 870         struct cyapa *cyapa = data;
 871
 872         sysfs_unmerge_group(&cyapa->client->dev.kobj,
 873                                 &cyapa_power_runtime_group);
 874 }
 875
 876 static int cyapa_start_runtime(struct cyapa *cyapa)
 877 {
 878         struct device *dev = &cyapa->client->dev;
 879         int error;
 880
 881         cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE;
 882         cyapa->runtime_suspend_sleep_time =
 883                 cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode);
 884
 885         error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group);
 886         if (error) {
 887                 dev_err(dev,
 888                         "failed to create power runtime group: %d\n", error);
 889                 return error;
 890         }
 891
 892         error = devm_add_action(dev, cyapa_remove_power_runtime_group, cyapa);
 893         if (error) {
 894                 cyapa_remove_power_runtime_group(cyapa);
 895                 dev_err(dev,
 896                         "failed to add power runtime cleanup action: %d\n",
 897                         error);
 898                 return error;
 899         }
 900
 901         /* runtime is enabled until device is operational and opened. */
 902         pm_runtime_set_suspended(dev);
 903         pm_runtime_use_autosuspend(dev);
 904         pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY);
 905
 906         return 0;
 907 }
 908 #else
 909 static inline int cyapa_start_runtime(struct cyapa *cyapa)
 910 {
 911         return 0;
 912 }
 913 #endif /* CONFIG_PM */
 914
 915 static ssize_t cyapa_show_fm_ver(struct device *dev,
 916                                  struct device_attribute *attr, char *buf)
 917 {
 918         int error;
 919         struct cyapa *cyapa = dev_get_drvdata(dev);
 920
 921         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
 922         if (error)
 923                 return error;
 924         error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver,
 925                          cyapa->fw_min_ver);
 926         mutex_unlock(&cyapa->state_sync_lock);
 927         return error;
 928 }
 929
 930 static ssize_t cyapa_show_product_id(struct device *dev,
 931                                      struct device_attribute *attr, char *buf)
 932 {
 933         struct cyapa *cyapa = dev_get_drvdata(dev);
 934         int size;
 935         int error;
 936
 937         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
 938         if (error)
 939                 return error;
 940         size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id);
 941         mutex_unlock(&cyapa->state_sync_lock);
 942         return size;
 943 }
 944
 945 static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name)
 946 {
 947         struct device *dev = &cyapa->client->dev;
 948         const struct firmware *fw;
 949         int error;
 950
 951         error = request_firmware(&fw, fw_name, dev);
 952         if (error) {
 953                 dev_err(dev, "Could not load firmware from %s: %d\n",
 954                         fw_name, error);
 955                 return error;
 956         }
 957
 958         error = cyapa->ops->check_fw(cyapa, fw);
 959         if (error) {
 960                 dev_err(dev, "Invalid CYAPA firmware image: %s\n",
 961                                 fw_name);
 962                 goto done;
 963         }
 964
 965         /*
 966          * Resume the potentially suspended device because doing FW
 967          * update on a device not in the FULL mode has a chance to
 968          * fail.
 969          */
 970         pm_runtime_get_sync(dev);
 971
 972         /* Require IRQ support for firmware update commands. */
 973         cyapa_enable_irq_for_cmd(cyapa);
 974
 975         error = cyapa->ops->bl_enter(cyapa);
 976         if (error) {
 977                 dev_err(dev, "bl_enter failed, %d\n", error);
 978                 goto err_detect;
 979         }
 980
 981         error = cyapa->ops->bl_activate(cyapa);
 982         if (error) {
 983                 dev_err(dev, "bl_activate failed, %d\n", error);
 984                 goto err_detect;
 985         }
 986
 987         error = cyapa->ops->bl_initiate(cyapa, fw);
 988         if (error) {
 989                 dev_err(dev, "bl_initiate failed, %d\n", error);
 990                 goto err_detect;
 991         }
 992
 993         error = cyapa->ops->update_fw(cyapa, fw);
 994         if (error) {
 995                 dev_err(dev, "update_fw failed, %d\n", error);
 996                 goto err_detect;
 997         }
 998
 999 err_detect:
1000         cyapa_disable_irq_for_cmd(cyapa);
1001         pm_runtime_put_noidle(dev);
1002
1003 done:
1004         release_firmware(fw);
1005         return error;
1006 }
1007
1008 static ssize_t cyapa_update_fw_store(struct device *dev,
1009                                      struct device_attribute *attr,
1010                                      const char *buf, size_t count)
1011 {
1012         struct cyapa *cyapa = dev_get_drvdata(dev);
1013         char fw_name[NAME_MAX];
1014         int ret, error;
1015
1016         if (count >= NAME_MAX) {
1017                 dev_err(dev, "File name too long\n");
1018                 return -EINVAL;
1019         }
1020
1021         memcpy(fw_name, buf, count);
1022         if (fw_name[count - 1] == '\n')
1023                 fw_name[count - 1] = '\0';
1024         else
1025                 fw_name[count] = '\0';
1026
1027         if (cyapa->input) {
1028                 /*
1029                  * Force the input device to be registered after the firmware
1030                  * image is updated, so if the corresponding parameters updated
1031                  * in the new firmware image can taken effect immediately.
1032                  */
1033                 input_unregister_device(cyapa->input);
1034                 cyapa->input = NULL;
1035         }
1036
1037         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1038         if (error) {
1039                 /*
1040                  * Whatever, do reinitialize to try to recover TP state to
1041                  * previous state just as it entered fw update entrance.
1042                  */
1043                 cyapa_reinitialize(cyapa);
1044                 return error;
1045         }
1046
1047         error = cyapa_firmware(cyapa, fw_name);
1048         if (error)
1049                 dev_err(dev, "firmware update failed: %d\n", error);
1050         else
1051                 dev_dbg(dev, "firmware update successfully done.\n");
1052
1053         /*
1054          * Redetect trackpad device states because firmware update process
1055          * will reset trackpad device into bootloader mode.
1056          */
1057         ret = cyapa_reinitialize(cyapa);
1058         if (ret) {
1059                 dev_err(dev, "failed to redetect after updated: %d\n", ret);
1060                 error = error ? error : ret;
1061         }
1062
1063         mutex_unlock(&cyapa->state_sync_lock);
1064
1065         return error ? error : count;
1066 }
1067
1068 static ssize_t cyapa_calibrate_store(struct device *dev,
1069                                      struct device_attribute *attr,
1070                                      const char *buf, size_t count)
1071 {
1072         struct cyapa *cyapa = dev_get_drvdata(dev);
1073         int error;
1074
1075         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1076         if (error)
1077                 return error;
1078
1079         if (cyapa->operational) {
1080                 cyapa_enable_irq_for_cmd(cyapa);
1081                 error = cyapa->ops->calibrate_store(dev, attr, buf, count);
1082                 cyapa_disable_irq_for_cmd(cyapa);
1083         } else {
1084                 error = -EBUSY;  /* Still running in bootloader mode. */
1085         }
1086
1087         mutex_unlock(&cyapa->state_sync_lock);
1088         return error < 0 ? error : count;
1089 }
1090
1091 static ssize_t cyapa_show_baseline(struct device *dev,
1092                                    struct device_attribute *attr, char *buf)
1093 {
1094         struct cyapa *cyapa = dev_get_drvdata(dev);
1095         ssize_t error;
1096
1097         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1098         if (error)
1099                 return error;
1100
1101         if (cyapa->operational) {
1102                 cyapa_enable_irq_for_cmd(cyapa);
1103                 error = cyapa->ops->show_baseline(dev, attr, buf);
1104                 cyapa_disable_irq_for_cmd(cyapa);
1105         } else {
1106                 error = -EBUSY;  /* Still running in bootloader mode. */
1107         }
1108
1109         mutex_unlock(&cyapa->state_sync_lock);
1110         return error;
1111 }
1112
1113 static char *cyapa_state_to_string(struct cyapa *cyapa)
1114 {
1115         switch (cyapa->state) {
1116         case CYAPA_STATE_BL_BUSY:
1117                 return "bootloader busy";
1118         case CYAPA_STATE_BL_IDLE:
1119                 return "bootloader idle";
1120         case CYAPA_STATE_BL_ACTIVE:
1121                 return "bootloader active";
1122         case CYAPA_STATE_GEN5_BL:
1123                 return "bootloader";
1124         case CYAPA_STATE_OP:
1125         case CYAPA_STATE_GEN5_APP:
1126                 return "operational";  /* Normal valid state. */
1127         default:
1128                 return "invalid mode";
1129         }
1130 }
1131
1132 static ssize_t cyapa_show_mode(struct device *dev,
1133                                    struct device_attribute *attr, char *buf)
1134 {
1135         struct cyapa *cyapa = dev_get_drvdata(dev);
1136         int size;
1137         int error;
1138
1139         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1140         if (error)
1141                 return error;
1142
1143         size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n",
1144                         cyapa->gen, cyapa_state_to_string(cyapa));
1145
1146         mutex_unlock(&cyapa->state_sync_lock);
1147         return size;
1148 }
1149
1150 static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL);
1151 static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL);
1152 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store);
1153 static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL);
1154 static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store);
1155 static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL);
1156
1157 static struct attribute *cyapa_sysfs_entries[] = {
1158         &dev_attr_firmware_version.attr,
1159         &dev_attr_product_id.attr,
1160         &dev_attr_update_fw.attr,
1161         &dev_attr_baseline.attr,
1162         &dev_attr_calibrate.attr,
1163         &dev_attr_mode.attr,
1164         NULL,
1165 };
1166
1167 static const struct attribute_group cyapa_sysfs_group = {
1168         .attrs = cyapa_sysfs_entries,
1169 };
1170
1171 static void cyapa_remove_sysfs_group(void *data)
1172 {
1173         struct cyapa *cyapa = data;
1174
1175         sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group);
1176 }
1177
1178 static int cyapa_probe(struct i2c_client *client,
1179                        const struct i2c_device_id *dev_id)
1180 {
1181         struct device *dev = &client->dev;
1182         struct cyapa *cyapa;
1183         u8 adapter_func;
1184         union i2c_smbus_data dummy;
1185         int error;
1186
1187         adapter_func = cyapa_check_adapter_functionality(client);
1188         if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) {
1189                 dev_err(dev, "not a supported I2C/SMBus adapter\n");
1190                 return -EIO;
1191         }
1192
1193         /* Make sure there is something at this address */
1194         if (i2c_smbus_xfer(client->adapter, client->addr, 0,
1195                         I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0)
1196                 return -ENODEV;
1197
1198         cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL);
1199         if (!cyapa)
1200                 return -ENOMEM;
1201
1202         /* i2c isn't supported, use smbus */
1203         if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS)
1204                 cyapa->smbus = true;
1205
1206         cyapa->client = client;
1207         i2c_set_clientdata(client, cyapa);
1208         sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr,
1209                 client->addr);
1210
1211         error = cyapa_initialize(cyapa);
1212         if (error) {
1213                 dev_err(dev, "failed to detect and initialize tp device.\n");
1214                 return error;
1215         }
1216
1217         error = sysfs_create_group(&client->dev.kobj, &cyapa_sysfs_group);
1218         if (error) {
1219                 dev_err(dev, "failed to create sysfs entries: %d\n", error);
1220                 return error;
1221         }
1222
1223         error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa);
1224         if (error) {
1225                 cyapa_remove_sysfs_group(cyapa);
1226                 dev_err(dev, "failed to add sysfs cleanup action: %d\n", error);
1227                 return error;
1228         }
1229
1230         error = cyapa_prepare_wakeup_controls(cyapa);
1231         if (error) {
1232                 dev_err(dev, "failed to prepare wakeup controls: %d\n", error);
1233                 return error;
1234         }
1235
1236         error = cyapa_start_runtime(cyapa);
1237         if (error) {
1238                 dev_err(dev, "failed to start pm_runtime: %d\n", error);
1239                 return error;
1240         }
1241
1242         error = devm_request_threaded_irq(dev, client->irq,
1243                                           NULL, cyapa_irq,
1244                                           IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1245                                           "cyapa", cyapa);
1246         if (error) {
1247                 dev_err(dev, "failed to request threaded irq: %d\n", error);
1248                 return error;
1249         }
1250
1251         /* Disable IRQ until the device is opened */
1252         disable_irq(client->irq);
1253
1254         /*
1255          * Register the device in the input subsystem when it's operational.
1256          * Otherwise, keep in this driver, so it can be be recovered or updated
1257          * through the sysfs mode and update_fw interfaces by user or apps.
1258          */
1259         if (cyapa->operational) {
1260                 error = cyapa_create_input_dev(cyapa);
1261                 if (error) {
1262                         dev_err(dev, "create input_dev instance failed: %d\n",
1263                                         error);
1264                         return error;
1265                 }
1266         }
1267
1268         return 0;
1269 }
1270
1271 static int __maybe_unused cyapa_suspend(struct device *dev)
1272 {
1273         struct i2c_client *client = to_i2c_client(dev);
1274         struct cyapa *cyapa = i2c_get_clientdata(client);
1275         u8 power_mode;
1276         int error;
1277
1278         error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1279         if (error)
1280                 return error;
1281
1282         /*
1283          * Runtime PM is enable only when device is in operational mode and
1284          * users in use, so need check it before disable it to
1285          * avoid unbalance warning.
1286          */
1287         if (pm_runtime_enabled(dev))
1288                 pm_runtime_disable(dev);
1289         disable_irq(client->irq);
1290
1291         /*
1292          * Set trackpad device to idle mode if wakeup is allowed,
1293          * otherwise turn off.
1294          */
1295         if (cyapa->operational) {
1296                 power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode
1297                                                     : PWR_MODE_OFF;
1298                 error = cyapa->ops->set_power_mode(cyapa, power_mode,
1299                                 cyapa->suspend_sleep_time);
1300                 if (error)
1301                         dev_err(dev, "suspend set power mode failed: %d\n",
1302                                         error);
1303         }
1304
1305         if (device_may_wakeup(dev))
1306                 cyapa->irq_wake = (enable_irq_wake(client->irq) == 0);
1307
1308         mutex_unlock(&cyapa->state_sync_lock);
1309         return 0;
1310 }
1311
1312 static int __maybe_unused cyapa_resume(struct device *dev)
1313 {
1314         struct i2c_client *client = to_i2c_client(dev);
1315         struct cyapa *cyapa = i2c_get_clientdata(client);
1316         int error;
1317
1318         mutex_lock(&cyapa->state_sync_lock);
1319
1320         if (device_may_wakeup(dev) && cyapa->irq_wake) {
1321                 disable_irq_wake(client->irq);
1322                 cyapa->irq_wake = false;
1323         }
1324
1325         /* Update device states and runtime PM states. */
1326         error = cyapa_reinitialize(cyapa);
1327         if (error)
1328                 dev_warn(dev, "failed to reinitialize TP device: %d\n", error);
1329
1330         enable_irq(client->irq);
1331
1332         mutex_unlock(&cyapa->state_sync_lock);
1333         return 0;
1334 }
1335
1336 static int __maybe_unused cyapa_runtime_suspend(struct device *dev)
1337 {
1338         struct cyapa *cyapa = dev_get_drvdata(dev);
1339         int error;
1340
1341         error = cyapa->ops->set_power_mode(cyapa,
1342                         cyapa->runtime_suspend_power_mode,
1343                         cyapa->runtime_suspend_sleep_time);
1344         if (error)
1345                 dev_warn(dev, "runtime suspend failed: %d\n", error);
1346
1347         return 0;
1348 }
1349
1350 static int __maybe_unused cyapa_runtime_resume(struct device *dev)
1351 {
1352         struct cyapa *cyapa = dev_get_drvdata(dev);
1353         int error;
1354
1355         error = cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0);
1356         if (error)
1357                 dev_warn(dev, "runtime resume failed: %d\n", error);
1358
1359         return 0;
1360 }
1361
1362 static const struct dev_pm_ops cyapa_pm_ops = {
1363         SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume)
1364         SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL)
1365 };
1366
1367 static const struct i2c_device_id cyapa_id_table[] = {
1368         { "cyapa", 0 },
1369         { },
1370 };
1371 MODULE_DEVICE_TABLE(i2c, cyapa_id_table);
1372
1373 #ifdef CONFIG_ACPI
1374 static const struct acpi_device_id cyapa_acpi_id[] = {
1375         { "CYAP0000", 0 },  /* Gen3 trackpad with 0x67 I2C address. */
1376         { "CYAP0001", 0 },  /* Gen5 trackpad with 0x24 I2C address. */
1377         { }
1378 };
1379 MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id);
1380 #endif
1381
1382 static struct i2c_driver cyapa_driver = {
1383         .driver = {
1384                 .name = "cyapa",
1385                 .owner = THIS_MODULE,
1386                 .pm = &cyapa_pm_ops,
1387                 .acpi_match_table = ACPI_PTR(cyapa_acpi_id),
1388         },
1389
1390         .probe = cyapa_probe,
1391         .id_table = cyapa_id_table,
1392 };
1393
1394 module_i2c_driver(cyapa_driver);
1395
1396 MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver");
1397 MODULE_AUTHOR("Dudley Du <dudl@cypress.com>");
1398 MODULE_LICENSE("GPL");