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 = &reg,
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, CYAPA_PM_ACTIVE);
387 if (error) {
388 dev_warn(dev, "set active power failed: %d\n", error);
389 goto out;
390 }
391 } else {
392 error = cyapa_reinitialize(cyapa);
393 if (error || !cyapa->operational) {
394 error = error ? error : -EAGAIN;
395 goto out;
396 }
397 }
398
399 enable_irq(client->irq);
400 if (!pm_runtime_enabled(dev)) {
401 pm_runtime_set_active(dev);
402 pm_runtime_enable(dev);
403 }
404
405 pm_runtime_get_sync(dev);
406 pm_runtime_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,
428 PWR_MODE_OFF, 0, CYAPA_PM_DEACTIVE);
429
430 mutex_unlock(&cyapa->state_sync_lock);
431}
432
433static int cyapa_create_input_dev(struct cyapa *cyapa)
434{
435 struct device *dev = &cyapa->client->dev;
436 struct input_dev *input;
437 int error;
438
439 if (!cyapa->physical_size_x || !cyapa->physical_size_y)
440 return -EINVAL;
441
442 input = devm_input_allocate_device(dev);
443 if (!input) {
444 dev_err(dev, "failed to allocate memory for input device.\n");
445 return -ENOMEM;
446 }
447
448 input->name = CYAPA_NAME;
449 input->phys = cyapa->phys;
450 input->id.bustype = BUS_I2C;
451 input->id.version = 1;
452 input->id.product = 0; /* Means any product in eventcomm. */
453 input->dev.parent = &cyapa->client->dev;
454
455 input->open = cyapa_open;
456 input->close = cyapa_close;
457
458 input_set_drvdata(input, cyapa);
459
460 __set_bit(EV_ABS, input->evbit);
461
462 /* Finger position */
463 input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0,
464 0);
465 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0,
466 0);
467 input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0);
468 if (cyapa->gen > CYAPA_GEN3) {
469 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
470 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
471 /*
472 * Orientation is the angle between the vertical axis and
473 * the major axis of the contact ellipse.
474 * The range is -127 to 127.
475 * the positive direction is clockwise form the vertical axis.
476 * If the ellipse of contact degenerates into a circle,
477 * orientation is reported as 0.
478 *
479 * Also, for Gen5 trackpad the accurate of this orientation
480 * value is value + (-30 ~ 30).
481 */
482 input_set_abs_params(input, ABS_MT_ORIENTATION,
483 -127, 127, 0, 0);
484 }
485 if (cyapa->gen >= CYAPA_GEN5) {
486 input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
487 input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0);
488 input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0);
489 }
490
491 input_abs_set_res(input, ABS_MT_POSITION_X,
492 cyapa->max_abs_x / cyapa->physical_size_x);
493 input_abs_set_res(input, ABS_MT_POSITION_Y,
494 cyapa->max_abs_y / cyapa->physical_size_y);
495
496 if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK)
497 __set_bit(BTN_LEFT, input->keybit);
498 if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK)
499 __set_bit(BTN_MIDDLE, input->keybit);
500 if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK)
501 __set_bit(BTN_RIGHT, input->keybit);
502
503 if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK)
504 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
505
506 /* Handle pointer emulation and unused slots in core */
507 error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS,
508 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED);
509 if (error) {
510 dev_err(dev, "failed to initialize MT slots: %d\n", error);
511 return error;
512 }
513
514 /* Register the device in input subsystem */
515 error = input_register_device(input);
516 if (error) {
517 dev_err(dev, "failed to register input device: %d\n", error);
518 return error;
519 }
520
521 cyapa->input = input;
522 return 0;
523}
524
525static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa)
526{
527 struct input_dev *input = cyapa->input;
528
529 if (!input || !input->users) {
530 /*
531 * When input is NULL, TP must be in deep sleep mode.
532 * In this mode, later non-power I2C command will always failed
533 * if not bring it out of deep sleep mode firstly,
534 * so must command TP to active mode here.
535 */
536 if (!input || cyapa->operational)
537 cyapa->ops->set_power_mode(cyapa,
538 PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE);
539 /* Gen3 always using polling mode for command. */
540 if (cyapa->gen >= CYAPA_GEN5)
541 enable_irq(cyapa->client->irq);
542 }
543}
544
545static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa)
546{
547 struct input_dev *input = cyapa->input;
548
549 if (!input || !input->users) {
550 if (cyapa->gen >= CYAPA_GEN5)
551 disable_irq(cyapa->client->irq);
552 if (!input || cyapa->operational)
553 cyapa->ops->set_power_mode(cyapa,
554 PWR_MODE_OFF, 0, CYAPA_PM_ACTIVE);
555 }
556}
557
558/*
559 * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time
560 *
561 * These are helper functions that convert to and from integer idle
562 * times and register settings to write to the PowerMode register.
563 * The trackpad supports between 20ms to 1000ms scan intervals.
564 * The time will be increased in increments of 10ms from 20ms to 100ms.
565 * From 100ms to 1000ms, time will be increased in increments of 20ms.
566 *
567 * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is:
568 * Idle_Command = Idle Time / 10;
569 * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is:
570 * Idle_Command = Idle Time / 20 + 5;
571 */
572u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time)
573{
574 u16 encoded_time;
575
576 sleep_time = clamp_val(sleep_time, 20, 1000);
577 encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5;
578 return (encoded_time << 2) & PWR_MODE_MASK;
579}
580
581u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode)
582{
583 u8 encoded_time = pwr_mode >> 2;
584
585 return (encoded_time < 10) ? encoded_time * 10
586 : (encoded_time - 5) * 20;
587}
588
589/* 0 on driver initialize and detected successfully, negative on failure. */
590static int cyapa_initialize(struct cyapa *cyapa)
591{
592 int error = 0;
593
594 cyapa->state = CYAPA_STATE_NO_DEVICE;
595 cyapa->gen = CYAPA_GEN_UNKNOWN;
596 mutex_init(&cyapa->state_sync_lock);
597
598 /*
599 * Set to hard code default, they will be updated with trackpad set
600 * default values after probe and initialized.
601 */
602 cyapa->suspend_power_mode = PWR_MODE_SLEEP;
603 cyapa->suspend_sleep_time =
604 cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode);
605
606 /* ops.initialize() is aimed to prepare for module communications. */
607 error = cyapa_gen3_ops.initialize(cyapa);
608 if (!error)
609 error = cyapa_gen5_ops.initialize(cyapa);
610 if (!error)
611 error = cyapa_gen6_ops.initialize(cyapa);
612 if (error)
613 return error;
614
615 error = cyapa_detect(cyapa);
616 if (error)
617 return error;
618
619 /* Power down the device until we need it. */
620 if (cyapa->operational)
621 cyapa->ops->set_power_mode(cyapa,
622 PWR_MODE_OFF, 0, CYAPA_PM_ACTIVE);
623
624 return 0;
625}
626
627static int cyapa_reinitialize(struct cyapa *cyapa)
628{
629 struct device *dev = &cyapa->client->dev;
630 struct input_dev *input = cyapa->input;
631 int error;
632
633 if (pm_runtime_enabled(dev))
634 pm_runtime_disable(dev);
635
636 /* Avoid command failures when TP was in OFF state. */
637 if (cyapa->operational)
638 cyapa->ops->set_power_mode(cyapa,
639 PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE);
640
641 error = cyapa_detect(cyapa);
642 if (error)
643 goto out;
644
645 if (!input && cyapa->operational) {
646 error = cyapa_create_input_dev(cyapa);
647 if (error) {
648 dev_err(dev, "create input_dev instance failed: %d\n",
649 error);
650 goto out;
651 }
652 }
653
654out:
655 if (!input || !input->users) {
656 /* Reset to power OFF state to save power when no user open. */
657 if (cyapa->operational)
658 cyapa->ops->set_power_mode(cyapa,
659 PWR_MODE_OFF, 0, CYAPA_PM_DEACTIVE);
660 } else if (!error && cyapa->operational) {
661 /*
662 * Make sure only enable runtime PM when device is
663 * in operational mode and input->users > 0.
664 */
665 pm_runtime_set_active(dev);
666 pm_runtime_enable(dev);
667
668 pm_runtime_get_sync(dev);
669 pm_runtime_mark_last_busy(dev);
670 pm_runtime_put_sync_autosuspend(dev);
671 }
672
673 return error;
674}
675
676static irqreturn_t cyapa_irq(int irq, void *dev_id)
677{
678 struct cyapa *cyapa = dev_id;
679 struct device *dev = &cyapa->client->dev;
680 int error;
681
682 if (device_may_wakeup(dev))
683 pm_wakeup_event(dev, 0);
684
685 /* Interrupt event can be caused by host command to trackpad device. */
686 if (cyapa->ops->irq_cmd_handler(cyapa)) {
687 /*
688 * Interrupt event maybe from trackpad device input reporting.
689 */
690 if (!cyapa->input) {
691 /*
692 * Still in probing or in firmware image
693 * updating or reading.
694 */
695 cyapa->ops->sort_empty_output_data(cyapa,
696 NULL, NULL, NULL);
697 goto out;
698 }
699
700 if (cyapa->operational) {
701 error = cyapa->ops->irq_handler(cyapa);
702
703 /*
704 * Apply runtime power management to touch report event
705 * except the events caused by the command responses.
706 * Note:
707 * It will introduce about 20~40 ms additional delay
708 * time in receiving for first valid touch report data.
709 * The time is used to execute device runtime resume
710 * process.
711 */
712 pm_runtime_get_sync(dev);
713 pm_runtime_mark_last_busy(dev);
714 pm_runtime_put_sync_autosuspend(dev);
715 }
716
717 if (!cyapa->operational || error) {
718 if (!mutex_trylock(&cyapa->state_sync_lock)) {
719 cyapa->ops->sort_empty_output_data(cyapa,
720 NULL, NULL, NULL);
721 goto out;
722 }
723 cyapa_reinitialize(cyapa);
724 mutex_unlock(&cyapa->state_sync_lock);
725 }
726 }
727
728out:
729 return IRQ_HANDLED;
730}
731
732/*
733 **************************************************************
734 * sysfs interface
735 **************************************************************
736*/
737#ifdef CONFIG_PM_SLEEP
738static ssize_t cyapa_show_suspend_scanrate(struct device *dev,
739 struct device_attribute *attr,
740 char *buf)
741{
742 struct cyapa *cyapa = dev_get_drvdata(dev);
743 u8 pwr_cmd;
744 u16 sleep_time;
745 int len;
746 int error;
747
748 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
749 if (error)
750 return error;
751
752 pwr_cmd = cyapa->suspend_power_mode;
753 sleep_time = cyapa->suspend_sleep_time;
754
755 mutex_unlock(&cyapa->state_sync_lock);
756
757 switch (pwr_cmd) {
758 case PWR_MODE_BTN_ONLY:
759 len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME);
760 break;
761
762 case PWR_MODE_OFF:
763 len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME);
764 break;
765
766 default:
767 len = scnprintf(buf, PAGE_SIZE, "%u\n",
768 cyapa->gen == CYAPA_GEN3 ?
769 cyapa_pwr_cmd_to_sleep_time(pwr_cmd) :
770 sleep_time);
771 break;
772 }
773
774 return len;
775}
776
777static ssize_t cyapa_update_suspend_scanrate(struct device *dev,
778 struct device_attribute *attr,
779 const char *buf, size_t count)
780{
781 struct cyapa *cyapa = dev_get_drvdata(dev);
782 u16 sleep_time;
783 int error;
784
785 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
786 if (error)
787 return error;
788
789 if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) {
790 cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY;
791 } else if (sysfs_streq(buf, OFF_MODE_NAME)) {
792 cyapa->suspend_power_mode = PWR_MODE_OFF;
793 } else if (!kstrtou16(buf, 10, &sleep_time)) {
794 cyapa->suspend_sleep_time = min_t(u16, sleep_time, 1000);
795 cyapa->suspend_power_mode =
796 cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time);
797 } else {
798 count = -EINVAL;
799 }
800
801 mutex_unlock(&cyapa->state_sync_lock);
802
803 return count;
804}
805
806static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR,
807 cyapa_show_suspend_scanrate,
808 cyapa_update_suspend_scanrate);
809
810static struct attribute *cyapa_power_wakeup_entries[] = {
811 &dev_attr_suspend_scanrate_ms.attr,
812 NULL,
813};
814
815static const struct attribute_group cyapa_power_wakeup_group = {
816 .name = power_group_name,
817 .attrs = cyapa_power_wakeup_entries,
818};
819
820static void cyapa_remove_power_wakeup_group(void *data)
821{
822 struct cyapa *cyapa = data;
823
824 sysfs_unmerge_group(&cyapa->client->dev.kobj,
825 &cyapa_power_wakeup_group);
826}
827
828static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa)
829{
830 struct i2c_client *client = cyapa->client;
831 struct device *dev = &client->dev;
832 int error;
833
834 if (device_can_wakeup(dev)) {
835 error = sysfs_merge_group(&dev->kobj,
836 &cyapa_power_wakeup_group);
837 if (error) {
838 dev_err(dev, "failed to add power wakeup group: %d\n",
839 error);
840 return error;
841 }
842
843 error = devm_add_action(dev,
844 cyapa_remove_power_wakeup_group, cyapa);
845 if (error) {
846 cyapa_remove_power_wakeup_group(cyapa);
847 dev_err(dev, "failed to add power cleanup action: %d\n",
848 error);
849 return error;
850 }
851 }
852
853 return 0;
854}
855#else
856static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa)
857{
858 return 0;
859}
860#endif /* CONFIG_PM_SLEEP */
861
862#ifdef CONFIG_PM
863static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev,
864 struct device_attribute *attr,
865 char *buf)
866{
867 struct cyapa *cyapa = dev_get_drvdata(dev);
868 u8 pwr_cmd;
869 u16 sleep_time;
870 int error;
871
872 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
873 if (error)
874 return error;
875
876 pwr_cmd = cyapa->runtime_suspend_power_mode;
877 sleep_time = cyapa->runtime_suspend_sleep_time;
878
879 mutex_unlock(&cyapa->state_sync_lock);
880
881 return scnprintf(buf, PAGE_SIZE, "%u\n",
882 cyapa->gen == CYAPA_GEN3 ?
883 cyapa_pwr_cmd_to_sleep_time(pwr_cmd) :
884 sleep_time);
885}
886
887static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev,
888 struct device_attribute *attr,
889 const char *buf, size_t count)
890{
891 struct cyapa *cyapa = dev_get_drvdata(dev);
892 u16 time;
893 int error;
894
895 if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) {
896 dev_err(dev, "invalid runtime suspend scanrate ms parameter\n");
897 return -EINVAL;
898 }
899
900 /*
901 * When the suspend scanrate is changed, pm_runtime_get to resume
902 * a potentially suspended device, update to the new pwr_cmd
903 * and then pm_runtime_put to suspend into the new power mode.
904 */
905 pm_runtime_get_sync(dev);
906
907 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
908 if (error)
909 return error;
910
911 cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000);
912 cyapa->runtime_suspend_power_mode =
913 cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time);
914
915 mutex_unlock(&cyapa->state_sync_lock);
916
917 pm_runtime_put_sync_autosuspend(dev);
918
919 return count;
920}
921
922static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR,
923 cyapa_show_rt_suspend_scanrate,
924 cyapa_update_rt_suspend_scanrate);
925
926static struct attribute *cyapa_power_runtime_entries[] = {
927 &dev_attr_runtime_suspend_scanrate_ms.attr,
928 NULL,
929};
930
931static const struct attribute_group cyapa_power_runtime_group = {
932 .name = power_group_name,
933 .attrs = cyapa_power_runtime_entries,
934};
935
936static void cyapa_remove_power_runtime_group(void *data)
937{
938 struct cyapa *cyapa = data;
939
940 sysfs_unmerge_group(&cyapa->client->dev.kobj,
941 &cyapa_power_runtime_group);
942}
943
944static int cyapa_start_runtime(struct cyapa *cyapa)
945{
946 struct device *dev = &cyapa->client->dev;
947 int error;
948
949 cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE;
950 cyapa->runtime_suspend_sleep_time =
951 cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode);
952
953 error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group);
954 if (error) {
955 dev_err(dev,
956 "failed to create power runtime group: %d\n", error);
957 return error;
958 }
959
960 error = devm_add_action(dev, cyapa_remove_power_runtime_group, cyapa);
961 if (error) {
962 cyapa_remove_power_runtime_group(cyapa);
963 dev_err(dev,
964 "failed to add power runtime cleanup action: %d\n",
965 error);
966 return error;
967 }
968
969 /* runtime is enabled until device is operational and opened. */
970 pm_runtime_set_suspended(dev);
971 pm_runtime_use_autosuspend(dev);
972 pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY);
973
974 return 0;
975}
976#else
977static inline int cyapa_start_runtime(struct cyapa *cyapa)
978{
979 return 0;
980}
981#endif /* CONFIG_PM */
982
983static ssize_t cyapa_show_fm_ver(struct device *dev,
984 struct device_attribute *attr, char *buf)
985{
986 int error;
987 struct cyapa *cyapa = dev_get_drvdata(dev);
988
989 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
990 if (error)
991 return error;
992 error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver,
993 cyapa->fw_min_ver);
994 mutex_unlock(&cyapa->state_sync_lock);
995 return error;
996}
997
998static ssize_t cyapa_show_product_id(struct device *dev,
999 struct device_attribute *attr, char *buf)
1000{
1001 struct cyapa *cyapa = dev_get_drvdata(dev);
1002 int size;
1003 int error;
1004
1005 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1006 if (error)
1007 return error;
1008 size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id);
1009 mutex_unlock(&cyapa->state_sync_lock);
1010 return size;
1011}
1012
1013static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name)
1014{
1015 struct device *dev = &cyapa->client->dev;
1016 const struct firmware *fw;
1017 int error;
1018
1019 error = request_firmware(&fw, fw_name, dev);
1020 if (error) {
1021 dev_err(dev, "Could not load firmware from %s: %d\n",
1022 fw_name, error);
1023 return error;
1024 }
1025
1026 error = cyapa->ops->check_fw(cyapa, fw);
1027 if (error) {
1028 dev_err(dev, "Invalid CYAPA firmware image: %s\n",
1029 fw_name);
1030 goto done;
1031 }
1032
1033 /*
1034 * Resume the potentially suspended device because doing FW
1035 * update on a device not in the FULL mode has a chance to
1036 * fail.
1037 */
1038 pm_runtime_get_sync(dev);
1039
1040 /* Require IRQ support for firmware update commands. */
1041 cyapa_enable_irq_for_cmd(cyapa);
1042
1043 error = cyapa->ops->bl_enter(cyapa);
1044 if (error) {
1045 dev_err(dev, "bl_enter failed, %d\n", error);
1046 goto err_detect;
1047 }
1048
1049 error = cyapa->ops->bl_activate(cyapa);
1050 if (error) {
1051 dev_err(dev, "bl_activate failed, %d\n", error);
1052 goto err_detect;
1053 }
1054
1055 error = cyapa->ops->bl_initiate(cyapa, fw);
1056 if (error) {
1057 dev_err(dev, "bl_initiate failed, %d\n", error);
1058 goto err_detect;
1059 }
1060
1061 error = cyapa->ops->update_fw(cyapa, fw);
1062 if (error) {
1063 dev_err(dev, "update_fw failed, %d\n", error);
1064 goto err_detect;
1065 }
1066
1067err_detect:
1068 cyapa_disable_irq_for_cmd(cyapa);
1069 pm_runtime_put_noidle(dev);
1070
1071done:
1072 release_firmware(fw);
1073 return error;
1074}
1075
1076static ssize_t cyapa_update_fw_store(struct device *dev,
1077 struct device_attribute *attr,
1078 const char *buf, size_t count)
1079{
1080 struct cyapa *cyapa = dev_get_drvdata(dev);
1081 char fw_name[NAME_MAX];
1082 int ret, error;
1083
1084 if (count >= NAME_MAX) {
1085 dev_err(dev, "File name too long\n");
1086 return -EINVAL;
1087 }
1088
1089 memcpy(fw_name, buf, count);
1090 if (fw_name[count - 1] == '\n')
1091 fw_name[count - 1] = '\0';
1092 else
1093 fw_name[count] = '\0';
1094
1095 if (cyapa->input) {
1096 /*
1097 * Force the input device to be registered after the firmware
1098 * image is updated, so if the corresponding parameters updated
1099 * in the new firmware image can taken effect immediately.
1100 */
1101 input_unregister_device(cyapa->input);
1102 cyapa->input = NULL;
1103 }
1104
1105 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1106 if (error) {
1107 /*
1108 * Whatever, do reinitialize to try to recover TP state to
1109 * previous state just as it entered fw update entrance.
1110 */
1111 cyapa_reinitialize(cyapa);
1112 return error;
1113 }
1114
1115 error = cyapa_firmware(cyapa, fw_name);
1116 if (error)
1117 dev_err(dev, "firmware update failed: %d\n", error);
1118 else
1119 dev_dbg(dev, "firmware update successfully done.\n");
1120
1121 /*
1122 * Re-detect trackpad device states because firmware update process
1123 * will reset trackpad device into bootloader mode.
1124 */
1125 ret = cyapa_reinitialize(cyapa);
1126 if (ret) {
1127 dev_err(dev, "failed to re-detect after updated: %d\n", ret);
1128 error = error ? error : ret;
1129 }
1130
1131 mutex_unlock(&cyapa->state_sync_lock);
1132
1133 return error ? error : count;
1134}
1135
1136static ssize_t cyapa_calibrate_store(struct device *dev,
1137 struct device_attribute *attr,
1138 const char *buf, size_t count)
1139{
1140 struct cyapa *cyapa = dev_get_drvdata(dev);
1141 int error;
1142
1143 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1144 if (error)
1145 return error;
1146
1147 if (cyapa->operational) {
1148 cyapa_enable_irq_for_cmd(cyapa);
1149 error = cyapa->ops->calibrate_store(dev, attr, buf, count);
1150 cyapa_disable_irq_for_cmd(cyapa);
1151 } else {
1152 error = -EBUSY; /* Still running in bootloader mode. */
1153 }
1154
1155 mutex_unlock(&cyapa->state_sync_lock);
1156 return error < 0 ? error : count;
1157}
1158
1159static ssize_t cyapa_show_baseline(struct device *dev,
1160 struct device_attribute *attr, char *buf)
1161{
1162 struct cyapa *cyapa = dev_get_drvdata(dev);
1163 ssize_t error;
1164
1165 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1166 if (error)
1167 return error;
1168
1169 if (cyapa->operational) {
1170 cyapa_enable_irq_for_cmd(cyapa);
1171 error = cyapa->ops->show_baseline(dev, attr, buf);
1172 cyapa_disable_irq_for_cmd(cyapa);
1173 } else {
1174 error = -EBUSY; /* Still running in bootloader mode. */
1175 }
1176
1177 mutex_unlock(&cyapa->state_sync_lock);
1178 return error;
1179}
1180
1181static char *cyapa_state_to_string(struct cyapa *cyapa)
1182{
1183 switch (cyapa->state) {
1184 case CYAPA_STATE_BL_BUSY:
1185 return "bootloader busy";
1186 case CYAPA_STATE_BL_IDLE:
1187 return "bootloader idle";
1188 case CYAPA_STATE_BL_ACTIVE:
1189 return "bootloader active";
1190 case CYAPA_STATE_GEN5_BL:
1191 case CYAPA_STATE_GEN6_BL:
1192 return "bootloader";
1193 case CYAPA_STATE_OP:
1194 case CYAPA_STATE_GEN5_APP:
1195 case CYAPA_STATE_GEN6_APP:
1196 return "operational"; /* Normal valid state. */
1197 default:
1198 return "invalid mode";
1199 }
1200}
1201
1202static ssize_t cyapa_show_mode(struct device *dev,
1203 struct device_attribute *attr, char *buf)
1204{
1205 struct cyapa *cyapa = dev_get_drvdata(dev);
1206 int size;
1207 int error;
1208
1209 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1210 if (error)
1211 return error;
1212
1213 size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n",
1214 cyapa->gen, cyapa_state_to_string(cyapa));
1215
1216 mutex_unlock(&cyapa->state_sync_lock);
1217 return size;
1218}
1219
1220static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL);
1221static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL);
1222static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store);
1223static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL);
1224static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store);
1225static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL);
1226
1227static struct attribute *cyapa_sysfs_entries[] = {
1228 &dev_attr_firmware_version.attr,
1229 &dev_attr_product_id.attr,
1230 &dev_attr_update_fw.attr,
1231 &dev_attr_baseline.attr,
1232 &dev_attr_calibrate.attr,
1233 &dev_attr_mode.attr,
1234 NULL,
1235};
1236
1237static const struct attribute_group cyapa_sysfs_group = {
1238 .attrs = cyapa_sysfs_entries,
1239};
1240
1241static void cyapa_remove_sysfs_group(void *data)
1242{
1243 struct cyapa *cyapa = data;
1244
1245 sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group);
1246}
1247
1248static void cyapa_disable_regulator(void *data)
1249{
1250 struct cyapa *cyapa = data;
1251
1252 regulator_disable(cyapa->vcc);
1253}
1254
1255static int cyapa_probe(struct i2c_client *client,
1256 const struct i2c_device_id *dev_id)
1257{
1258 struct device *dev = &client->dev;
1259 struct cyapa *cyapa;
1260 u8 adapter_func;
1261 union i2c_smbus_data dummy;
1262 int error;
1263
1264 adapter_func = cyapa_check_adapter_functionality(client);
1265 if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) {
1266 dev_err(dev, "not a supported I2C/SMBus adapter\n");
1267 return -EIO;
1268 }
1269
1270 /* Make sure there is something at this address */
1271 if (i2c_smbus_xfer(client->adapter, client->addr, 0,
1272 I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0)
1273 return -ENODEV;
1274
1275 cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL);
1276 if (!cyapa)
1277 return -ENOMEM;
1278
1279 /* i2c isn't supported, use smbus */
1280 if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS)
1281 cyapa->smbus = true;
1282
1283 cyapa->client = client;
1284 i2c_set_clientdata(client, cyapa);
1285 sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr,
1286 client->addr);
1287
1288 cyapa->vcc = devm_regulator_get(dev, "vcc");
1289 if (IS_ERR(cyapa->vcc)) {
1290 error = PTR_ERR(cyapa->vcc);
1291 dev_err(dev, "failed to get vcc regulator: %d\n", error);
1292 return error;
1293 }
1294
1295 error = regulator_enable(cyapa->vcc);
1296 if (error) {
1297 dev_err(dev, "failed to enable regulator: %d\n", error);
1298 return error;
1299 }
1300
1301 error = devm_add_action(dev, cyapa_disable_regulator, cyapa);
1302 if (error) {
1303 cyapa_disable_regulator(cyapa);
1304 dev_err(dev, "failed to add disable regulator action: %d\n",
1305 error);
1306 return error;
1307 }
1308
1309 error = cyapa_initialize(cyapa);
1310 if (error) {
1311 dev_err(dev, "failed to detect and initialize tp device.\n");
1312 return error;
1313 }
1314
1315 error = sysfs_create_group(&dev->kobj, &cyapa_sysfs_group);
1316 if (error) {
1317 dev_err(dev, "failed to create sysfs entries: %d\n", error);
1318 return error;
1319 }
1320
1321 error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa);
1322 if (error) {
1323 cyapa_remove_sysfs_group(cyapa);
1324 dev_err(dev, "failed to add sysfs cleanup action: %d\n", error);
1325 return error;
1326 }
1327
1328 error = cyapa_prepare_wakeup_controls(cyapa);
1329 if (error) {
1330 dev_err(dev, "failed to prepare wakeup controls: %d\n", error);
1331 return error;
1332 }
1333
1334 error = cyapa_start_runtime(cyapa);
1335 if (error) {
1336 dev_err(dev, "failed to start pm_runtime: %d\n", error);
1337 return error;
1338 }
1339
1340 error = devm_request_threaded_irq(dev, client->irq,
1341 NULL, cyapa_irq,
1342 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1343 "cyapa", cyapa);
1344 if (error) {
1345 dev_err(dev, "failed to request threaded irq: %d\n", error);
1346 return error;
1347 }
1348
1349 /* Disable IRQ until the device is opened */
1350 disable_irq(client->irq);
1351
1352 /*
1353 * Register the device in the input subsystem when it's operational.
1354 * Otherwise, keep in this driver, so it can be be recovered or updated
1355 * through the sysfs mode and update_fw interfaces by user or apps.
1356 */
1357 if (cyapa->operational) {
1358 error = cyapa_create_input_dev(cyapa);
1359 if (error) {
1360 dev_err(dev, "create input_dev instance failed: %d\n",
1361 error);
1362 return error;
1363 }
1364 }
1365
1366 return 0;
1367}
1368
1369static int __maybe_unused cyapa_suspend(struct device *dev)
1370{
1371 struct i2c_client *client = to_i2c_client(dev);
1372 struct cyapa *cyapa = i2c_get_clientdata(client);
1373 u8 power_mode;
1374 int error;
1375
1376 error = mutex_lock_interruptible(&cyapa->state_sync_lock);
1377 if (error)
1378 return error;
1379
1380 /*
1381 * Runtime PM is enable only when device is in operational mode and
1382 * users in use, so need check it before disable it to
1383 * avoid unbalance warning.
1384 */
1385 if (pm_runtime_enabled(dev))
1386 pm_runtime_disable(dev);
1387 disable_irq(client->irq);
1388
1389 /*
1390 * Set trackpad device to idle mode if wakeup is allowed,
1391 * otherwise turn off.
1392 */
1393 if (cyapa->operational) {
1394 power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode
1395 : PWR_MODE_OFF;
1396 error = cyapa->ops->set_power_mode(cyapa, power_mode,
1397 cyapa->suspend_sleep_time, CYAPA_PM_SUSPEND);
1398 if (error)
1399 dev_err(dev, "suspend set power mode failed: %d\n",
1400 error);
1401 }
1402
1403 /*
1404 * Disable proximity interrupt when system idle, want true touch to
1405 * wake the system.
1406 */
1407 if (cyapa->dev_pwr_mode != PWR_MODE_OFF)
1408 cyapa->ops->set_proximity(cyapa, false);
1409
1410 if (device_may_wakeup(dev))
1411 cyapa->irq_wake = (enable_irq_wake(client->irq) == 0);
1412
1413 mutex_unlock(&cyapa->state_sync_lock);
1414 return 0;
1415}
1416
1417static int __maybe_unused cyapa_resume(struct device *dev)
1418{
1419 struct i2c_client *client = to_i2c_client(dev);
1420 struct cyapa *cyapa = i2c_get_clientdata(client);
1421 int error;
1422
1423 mutex_lock(&cyapa->state_sync_lock);
1424
1425 if (device_may_wakeup(dev) && cyapa->irq_wake) {
1426 disable_irq_wake(client->irq);
1427 cyapa->irq_wake = false;
1428 }
1429
1430 /*
1431 * Update device states and runtime PM states.
1432 * Re-Enable proximity interrupt after enter operational mode.
1433 */
1434 error = cyapa_reinitialize(cyapa);
1435 if (error)
1436 dev_warn(dev, "failed to reinitialize TP device: %d\n", error);
1437
1438 enable_irq(client->irq);
1439
1440 mutex_unlock(&cyapa->state_sync_lock);
1441 return 0;
1442}
1443
1444static int __maybe_unused cyapa_runtime_suspend(struct device *dev)
1445{
1446 struct cyapa *cyapa = dev_get_drvdata(dev);
1447 int error;
1448
1449 error = cyapa->ops->set_power_mode(cyapa,
1450 cyapa->runtime_suspend_power_mode,
1451 cyapa->runtime_suspend_sleep_time,
1452 CYAPA_PM_RUNTIME_SUSPEND);
1453 if (error)
1454 dev_warn(dev, "runtime suspend failed: %d\n", error);
1455
1456 return 0;
1457}
1458
1459static int __maybe_unused cyapa_runtime_resume(struct device *dev)
1460{
1461 struct cyapa *cyapa = dev_get_drvdata(dev);
1462 int error;
1463
1464 error = cyapa->ops->set_power_mode(cyapa,
1465 PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_RUNTIME_RESUME);
1466 if (error)
1467 dev_warn(dev, "runtime resume failed: %d\n", error);
1468
1469 return 0;
1470}
1471
1472static const struct dev_pm_ops cyapa_pm_ops = {
1473 SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume)
1474 SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL)
1475};
1476
1477static const struct i2c_device_id cyapa_id_table[] = {
1478 { "cyapa", 0 },
1479 { },
1480};
1481MODULE_DEVICE_TABLE(i2c, cyapa_id_table);
1482
1483#ifdef CONFIG_ACPI
1484static const struct acpi_device_id cyapa_acpi_id[] = {
1485 { "CYAP0000", 0 }, /* Gen3 trackpad with 0x67 I2C address. */
1486 { "CYAP0001", 0 }, /* Gen5 trackpad with 0x24 I2C address. */
1487 { "CYAP0002", 0 }, /* Gen6 trackpad with 0x24 I2C address. */
1488 { }
1489};
1490MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id);
1491#endif
1492
1493#ifdef CONFIG_OF
1494static const struct of_device_id cyapa_of_match[] = {
1495 { .compatible = "cypress,cyapa" },
1496 { /* sentinel */ }
1497};
1498MODULE_DEVICE_TABLE(of, cyapa_of_match);
1499#endif
1500
1501static struct i2c_driver cyapa_driver = {
1502 .driver = {
1503 .name = "cyapa",
1504 .pm = &cyapa_pm_ops,
1505 .acpi_match_table = ACPI_PTR(cyapa_acpi_id),
1506 .of_match_table = of_match_ptr(cyapa_of_match),
1507 },
1508
1509 .probe = cyapa_probe,
1510 .id_table = cyapa_id_table,
1511};
1512
1513module_i2c_driver(cyapa_driver);
1514
1515MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver");
1516MODULE_AUTHOR("Dudley Du <dudl@cypress.com>");
1517MODULE_LICENSE("GPL");
1518