Commit | Line | Data |
---|---|---|
d7e34d12 BL |
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 | * | |
823a11fd | 9 | * Copyright (C) 2011-2014 Cypress Semiconductor, Inc. |
d7e34d12 BL |
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> | |
9f1cd857 | 23 | #include <linux/mutex.h> |
d7e34d12 | 24 | #include <linux/slab.h> |
9f1cd857 | 25 | #include <linux/uaccess.h> |
67286508 | 26 | #include <linux/pm_runtime.h> |
9f1cd857 | 27 | #include "cyapa.h" |
d7e34d12 | 28 | |
d7e34d12 | 29 | |
6ddaf744 BL |
30 | #define CYAPA_ADAPTER_FUNC_NONE 0 |
31 | #define CYAPA_ADAPTER_FUNC_I2C 1 | |
32 | #define CYAPA_ADAPTER_FUNC_SMBUS 2 | |
33 | #define CYAPA_ADAPTER_FUNC_BOTH 3 | |
34 | ||
9f1cd857 | 35 | const char product_id[] = "CYTRA"; |
d7e34d12 | 36 | |
9f1cd857 | 37 | static int cyapa_reinitialize(struct cyapa *cyapa); |
6ddaf744 | 38 | |
9f1cd857 | 39 | static inline bool cyapa_is_bootloader_mode(struct cyapa *cyapa) |
d7e34d12 | 40 | { |
9f1cd857 DD |
41 | if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_BL) |
42 | return true; | |
43 | ||
44 | if (cyapa->gen == CYAPA_GEN3 && | |
45 | cyapa->state >= CYAPA_STATE_BL_BUSY && | |
46 | cyapa->state <= CYAPA_STATE_BL_ACTIVE) | |
47 | return true; | |
48 | ||
49 | return false; | |
d7e34d12 BL |
50 | } |
51 | ||
9f1cd857 | 52 | static inline bool cyapa_is_operational_mode(struct cyapa *cyapa) |
d7e34d12 | 53 | { |
9f1cd857 DD |
54 | if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_APP) |
55 | return true; | |
56 | ||
57 | if (cyapa->gen == CYAPA_GEN3 && cyapa->state == CYAPA_STATE_OP) | |
58 | return true; | |
59 | ||
60 | return false; | |
d7e34d12 BL |
61 | } |
62 | ||
9f1cd857 DD |
63 | /* Returns 0 on success, else negative errno on failure. */ |
64 | static ssize_t cyapa_i2c_read(struct cyapa *cyapa, u8 reg, size_t len, | |
65 | u8 *values) | |
6ddaf744 | 66 | { |
6ddaf744 | 67 | struct i2c_client *client = cyapa->client; |
9f1cd857 DD |
68 | struct i2c_msg msgs[] = { |
69 | { | |
70 | .addr = client->addr, | |
71 | .flags = 0, | |
72 | .len = 1, | |
73 | .buf = ®, | |
74 | }, | |
75 | { | |
76 | .addr = client->addr, | |
77 | .flags = I2C_M_RD, | |
78 | .len = len, | |
79 | .buf = values, | |
80 | }, | |
81 | }; | |
82 | int ret; | |
6ddaf744 | 83 | |
9f1cd857 | 84 | ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); |
6ddaf744 | 85 | |
9f1cd857 DD |
86 | if (ret != ARRAY_SIZE(msgs)) |
87 | return ret < 0 ? ret : -EIO; | |
6ddaf744 | 88 | |
9f1cd857 | 89 | return 0; |
6ddaf744 BL |
90 | } |
91 | ||
9f1cd857 DD |
92 | /** |
93 | * cyapa_i2c_write - Execute i2c block data write operation | |
94 | * @cyapa: Handle to this driver | |
95 | * @ret: Offset of the data to written in the register map | |
96 | * @len: number of bytes to write | |
97 | * @values: Data to be written | |
98 | * | |
99 | * Return negative errno code on error; return zero when success. | |
100 | */ | |
101 | static int cyapa_i2c_write(struct cyapa *cyapa, u8 reg, | |
102 | size_t len, const void *values) | |
d7e34d12 | 103 | { |
9f1cd857 DD |
104 | struct i2c_client *client = cyapa->client; |
105 | char buf[32]; | |
106 | int ret; | |
d7e34d12 | 107 | |
9f1cd857 DD |
108 | if (len > sizeof(buf) - 1) |
109 | return -ENOMEM; | |
d7e34d12 | 110 | |
9f1cd857 DD |
111 | buf[0] = reg; |
112 | memcpy(&buf[1], values, len); | |
d7e34d12 | 113 | |
9f1cd857 DD |
114 | ret = i2c_master_send(client, buf, len + 1); |
115 | if (ret != len + 1) | |
116 | return ret < 0 ? ret : -EIO; | |
117 | ||
118 | return 0; | |
d7e34d12 BL |
119 | } |
120 | ||
9f1cd857 | 121 | static u8 cyapa_check_adapter_functionality(struct i2c_client *client) |
d7e34d12 | 122 | { |
9f1cd857 | 123 | u8 ret = CYAPA_ADAPTER_FUNC_NONE; |
d7e34d12 | 124 | |
9f1cd857 DD |
125 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) |
126 | ret |= CYAPA_ADAPTER_FUNC_I2C; | |
127 | if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | | |
128 | I2C_FUNC_SMBUS_BLOCK_DATA | | |
129 | I2C_FUNC_SMBUS_I2C_BLOCK)) | |
130 | ret |= CYAPA_ADAPTER_FUNC_SMBUS; | |
131 | return ret; | |
d7e34d12 BL |
132 | } |
133 | ||
134 | /* | |
135 | * Query device for its current operating state. | |
d7e34d12 BL |
136 | */ |
137 | static int cyapa_get_state(struct cyapa *cyapa) | |
138 | { | |
d7e34d12 | 139 | u8 status[BL_STATUS_SIZE]; |
9f1cd857 DD |
140 | u8 cmd[32]; |
141 | /* The i2c address of gen4 and gen5 trackpad device must be even. */ | |
142 | bool even_addr = ((cyapa->client->addr & 0x0001) == 0); | |
143 | bool smbus = false; | |
144 | int retries = 2; | |
823a11fd | 145 | int error; |
d7e34d12 BL |
146 | |
147 | cyapa->state = CYAPA_STATE_NO_DEVICE; | |
148 | ||
149 | /* | |
150 | * Get trackpad status by reading 3 registers starting from 0. | |
151 | * If the device is in the bootloader, this will be BL_HEAD. | |
152 | * If the device is in operation mode, this will be the DATA regs. | |
153 | * | |
154 | */ | |
823a11fd | 155 | error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE, |
9f1cd857 | 156 | status); |
6ddaf744 BL |
157 | |
158 | /* | |
159 | * On smbus systems in OP mode, the i2c_reg_read will fail with | |
160 | * -ETIMEDOUT. In this case, try again using the smbus equivalent | |
161 | * command. This should return a BL_HEAD indicating CYAPA_STATE_OP. | |
162 | */ | |
9f1cd857 DD |
163 | if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) { |
164 | if (!even_addr) | |
165 | error = cyapa_read_block(cyapa, | |
166 | CYAPA_CMD_BL_STATUS, status); | |
167 | smbus = true; | |
168 | } | |
6ddaf744 | 169 | |
823a11fd | 170 | if (error != BL_STATUS_SIZE) |
d7e34d12 BL |
171 | goto error; |
172 | ||
9f1cd857 DD |
173 | /* |
174 | * Detect trackpad protocol based on characteristic registers and bits. | |
175 | */ | |
176 | do { | |
177 | cyapa->status[REG_OP_STATUS] = status[REG_OP_STATUS]; | |
178 | cyapa->status[REG_BL_STATUS] = status[REG_BL_STATUS]; | |
179 | cyapa->status[REG_BL_ERROR] = status[REG_BL_ERROR]; | |
180 | ||
181 | if (cyapa->gen == CYAPA_GEN_UNKNOWN || | |
182 | cyapa->gen == CYAPA_GEN3) { | |
183 | error = cyapa_gen3_ops.state_parse(cyapa, | |
184 | status, BL_STATUS_SIZE); | |
185 | if (!error) | |
186 | goto out_detected; | |
d7e34d12 | 187 | } |
6972a859 DD |
188 | if ((cyapa->gen == CYAPA_GEN_UNKNOWN || |
189 | cyapa->gen == CYAPA_GEN5) && | |
190 | !smbus && even_addr) { | |
191 | error = cyapa_gen5_ops.state_parse(cyapa, | |
192 | status, BL_STATUS_SIZE); | |
193 | if (!error) | |
194 | goto out_detected; | |
195 | } | |
d7e34d12 | 196 | |
9f1cd857 DD |
197 | /* |
198 | * Write 0x00 0x00 to trackpad device to force update its | |
199 | * status, then redo the detection again. | |
200 | */ | |
201 | if (!smbus) { | |
202 | cmd[0] = 0x00; | |
203 | cmd[1] = 0x00; | |
204 | error = cyapa_i2c_write(cyapa, 0, 2, cmd); | |
205 | if (error) | |
206 | goto error; | |
207 | ||
208 | msleep(50); | |
209 | ||
210 | error = cyapa_i2c_read(cyapa, BL_HEAD_OFFSET, | |
211 | BL_STATUS_SIZE, status); | |
212 | if (error) | |
213 | goto error; | |
214 | } | |
215 | } while (--retries > 0 && !smbus); | |
216 | ||
217 | goto error; | |
218 | ||
219 | out_detected: | |
220 | if (cyapa->state <= CYAPA_STATE_BL_BUSY) | |
221 | return -EAGAIN; | |
d7e34d12 | 222 | return 0; |
9f1cd857 | 223 | |
d7e34d12 | 224 | error: |
823a11fd | 225 | return (error < 0) ? error : -EAGAIN; |
d7e34d12 BL |
226 | } |
227 | ||
228 | /* | |
229 | * Poll device for its status in a loop, waiting up to timeout for a response. | |
230 | * | |
231 | * When the device switches state, it usually takes ~300 ms. | |
232 | * However, when running a new firmware image, the device must calibrate its | |
233 | * sensors, which can take as long as 2 seconds. | |
234 | * | |
235 | * Note: The timeout has granularity of the polling rate, which is 100 ms. | |
236 | * | |
237 | * Returns: | |
238 | * 0 when the device eventually responds with a valid non-busy state. | |
239 | * -ETIMEDOUT if device never responds (too many -EAGAIN) | |
9f1cd857 DD |
240 | * -EAGAIN if bootload is busy, or unknown state. |
241 | * < 0 other errors | |
d7e34d12 | 242 | */ |
9f1cd857 | 243 | int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout) |
d7e34d12 | 244 | { |
823a11fd | 245 | int error; |
d7e34d12 BL |
246 | int tries = timeout / 100; |
247 | ||
9f1cd857 | 248 | do { |
823a11fd | 249 | error = cyapa_get_state(cyapa); |
9f1cd857 DD |
250 | if (!error && cyapa->state > CYAPA_STATE_BL_BUSY) |
251 | return 0; | |
d7e34d12 | 252 | |
9f1cd857 DD |
253 | msleep(100); |
254 | } while (tries--); | |
d7e34d12 | 255 | |
9f1cd857 | 256 | return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error; |
d7e34d12 BL |
257 | } |
258 | ||
259 | /* | |
260 | * Check if device is operational. | |
261 | * | |
262 | * An operational device is responding, has exited bootloader, and has | |
263 | * firmware supported by this driver. | |
264 | * | |
265 | * Returns: | |
9f1cd857 | 266 | * -ENODEV no device |
d7e34d12 BL |
267 | * -EBUSY no device or in bootloader |
268 | * -EIO failure while reading from device | |
9f1cd857 | 269 | * -ETIMEDOUT timeout failure for bus idle or bus no response |
d7e34d12 BL |
270 | * -EAGAIN device is still in bootloader |
271 | * if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware | |
272 | * -EINVAL device is in operational mode, but not supported by this driver | |
273 | * 0 device is supported | |
274 | */ | |
275 | static int cyapa_check_is_operational(struct cyapa *cyapa) | |
276 | { | |
823a11fd | 277 | int error; |
d7e34d12 | 278 | |
9f1cd857 | 279 | error = cyapa_poll_state(cyapa, 4000); |
823a11fd DD |
280 | if (error) |
281 | return error; | |
d7e34d12 | 282 | |
9f1cd857 | 283 | switch (cyapa->gen) { |
6972a859 DD |
284 | case CYAPA_GEN5: |
285 | cyapa->ops = &cyapa_gen5_ops; | |
286 | break; | |
9f1cd857 DD |
287 | case CYAPA_GEN3: |
288 | cyapa->ops = &cyapa_gen3_ops; | |
289 | break; | |
d7e34d12 | 290 | default: |
9f1cd857 | 291 | return -ENODEV; |
d7e34d12 | 292 | } |
9f1cd857 DD |
293 | |
294 | error = cyapa->ops->operational_check(cyapa); | |
295 | if (!error && cyapa_is_operational_mode(cyapa)) | |
296 | cyapa->operational = true; | |
297 | else | |
298 | cyapa->operational = false; | |
299 | ||
300 | return error; | |
d7e34d12 BL |
301 | } |
302 | ||
9f1cd857 DD |
303 | |
304 | /* | |
305 | * Returns 0 on device detected, negative errno on no device detected. | |
306 | * And when the device is detected and opertaional, it will be reset to | |
307 | * full power active mode automatically. | |
308 | */ | |
309 | static int cyapa_detect(struct cyapa *cyapa) | |
d7e34d12 | 310 | { |
d7e34d12 | 311 | struct device *dev = &cyapa->client->dev; |
9f1cd857 | 312 | int error; |
d7e34d12 | 313 | |
9f1cd857 DD |
314 | error = cyapa_check_is_operational(cyapa); |
315 | if (error) { | |
316 | if (error != -ETIMEDOUT && error != -ENODEV && | |
317 | cyapa_is_bootloader_mode(cyapa)) { | |
318 | dev_warn(dev, "device detected but not operational\n"); | |
319 | return 0; | |
320 | } | |
d7e34d12 | 321 | |
9f1cd857 DD |
322 | dev_err(dev, "no device detected: %d\n", error); |
323 | return error; | |
d7e34d12 BL |
324 | } |
325 | ||
9f1cd857 | 326 | return 0; |
6ddaf744 BL |
327 | } |
328 | ||
b1cfa7b4 DD |
329 | static int cyapa_open(struct input_dev *input) |
330 | { | |
331 | struct cyapa *cyapa = input_get_drvdata(input); | |
332 | struct i2c_client *client = cyapa->client; | |
333 | int error; | |
334 | ||
9f1cd857 DD |
335 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); |
336 | if (error) | |
b1cfa7b4 | 337 | return error; |
9f1cd857 DD |
338 | |
339 | if (cyapa->operational) { | |
340 | /* | |
341 | * though failed to set active power mode, | |
342 | * but still may be able to work in lower scan rate | |
343 | * when in operational mode. | |
344 | */ | |
345 | error = cyapa->ops->set_power_mode(cyapa, | |
346 | PWR_MODE_FULL_ACTIVE, 0); | |
347 | if (error) { | |
348 | dev_warn(&client->dev, | |
349 | "set active power failed: %d\n", error); | |
350 | goto out; | |
351 | } | |
352 | } else { | |
353 | error = cyapa_reinitialize(cyapa); | |
354 | if (error || !cyapa->operational) { | |
355 | error = error ? error : -EAGAIN; | |
356 | goto out; | |
357 | } | |
b1cfa7b4 DD |
358 | } |
359 | ||
360 | enable_irq(client->irq); | |
67286508 DD |
361 | if (!pm_runtime_enabled(&client->dev)) { |
362 | pm_runtime_set_active(&client->dev); | |
363 | pm_runtime_enable(&client->dev); | |
364 | } | |
9f1cd857 DD |
365 | out: |
366 | mutex_unlock(&cyapa->state_sync_lock); | |
367 | return error; | |
b1cfa7b4 DD |
368 | } |
369 | ||
370 | static void cyapa_close(struct input_dev *input) | |
371 | { | |
372 | struct cyapa *cyapa = input_get_drvdata(input); | |
9f1cd857 DD |
373 | struct i2c_client *client = cyapa->client; |
374 | ||
375 | mutex_lock(&cyapa->state_sync_lock); | |
b1cfa7b4 | 376 | |
9f1cd857 | 377 | disable_irq(client->irq); |
67286508 DD |
378 | if (pm_runtime_enabled(&client->dev)) |
379 | pm_runtime_disable(&client->dev); | |
380 | pm_runtime_set_suspended(&client->dev); | |
381 | ||
9f1cd857 DD |
382 | if (cyapa->operational) |
383 | cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); | |
384 | ||
385 | mutex_unlock(&cyapa->state_sync_lock); | |
b1cfa7b4 DD |
386 | } |
387 | ||
d7e34d12 BL |
388 | static int cyapa_create_input_dev(struct cyapa *cyapa) |
389 | { | |
390 | struct device *dev = &cyapa->client->dev; | |
d7e34d12 | 391 | struct input_dev *input; |
b1cfa7b4 | 392 | int error; |
d7e34d12 BL |
393 | |
394 | if (!cyapa->physical_size_x || !cyapa->physical_size_y) | |
395 | return -EINVAL; | |
396 | ||
b1cfa7b4 | 397 | input = devm_input_allocate_device(dev); |
d7e34d12 | 398 | if (!input) { |
823a11fd | 399 | dev_err(dev, "failed to allocate memory for input device.\n"); |
d7e34d12 BL |
400 | return -ENOMEM; |
401 | } | |
402 | ||
403 | input->name = CYAPA_NAME; | |
404 | input->phys = cyapa->phys; | |
405 | input->id.bustype = BUS_I2C; | |
406 | input->id.version = 1; | |
823a11fd | 407 | input->id.product = 0; /* Means any product in eventcomm. */ |
d7e34d12 BL |
408 | input->dev.parent = &cyapa->client->dev; |
409 | ||
b1cfa7b4 DD |
410 | input->open = cyapa_open; |
411 | input->close = cyapa_close; | |
412 | ||
d7e34d12 BL |
413 | input_set_drvdata(input, cyapa); |
414 | ||
415 | __set_bit(EV_ABS, input->evbit); | |
416 | ||
823a11fd | 417 | /* Finger position */ |
d7e34d12 BL |
418 | input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0, |
419 | 0); | |
420 | input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0, | |
421 | 0); | |
9f1cd857 DD |
422 | input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0); |
423 | if (cyapa->gen > CYAPA_GEN3) { | |
424 | input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); | |
425 | input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); | |
426 | /* | |
427 | * Orientation is the angle between the vertical axis and | |
428 | * the major axis of the contact ellipse. | |
429 | * The range is -127 to 127. | |
430 | * the positive direction is clockwise form the vertical axis. | |
431 | * If the ellipse of contact degenerates into a circle, | |
432 | * orientation is reported as 0. | |
433 | * | |
434 | * Also, for Gen5 trackpad the accurate of this orientation | |
435 | * value is value + (-30 ~ 30). | |
436 | */ | |
437 | input_set_abs_params(input, ABS_MT_ORIENTATION, | |
438 | -127, 127, 0, 0); | |
439 | } | |
440 | if (cyapa->gen >= CYAPA_GEN5) { | |
441 | input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); | |
442 | input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0); | |
443 | } | |
d7e34d12 BL |
444 | |
445 | input_abs_set_res(input, ABS_MT_POSITION_X, | |
446 | cyapa->max_abs_x / cyapa->physical_size_x); | |
447 | input_abs_set_res(input, ABS_MT_POSITION_Y, | |
448 | cyapa->max_abs_y / cyapa->physical_size_y); | |
449 | ||
450 | if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) | |
451 | __set_bit(BTN_LEFT, input->keybit); | |
452 | if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) | |
453 | __set_bit(BTN_MIDDLE, input->keybit); | |
454 | if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) | |
455 | __set_bit(BTN_RIGHT, input->keybit); | |
456 | ||
457 | if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK) | |
458 | __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); | |
459 | ||
823a11fd | 460 | /* Handle pointer emulation and unused slots in core */ |
b1cfa7b4 DD |
461 | error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS, |
462 | INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); | |
463 | if (error) { | |
464 | dev_err(dev, "failed to initialize MT slots: %d\n", error); | |
465 | return error; | |
d7e34d12 BL |
466 | } |
467 | ||
9f1cd857 DD |
468 | /* Register the device in input subsystem */ |
469 | error = input_register_device(input); | |
470 | if (error) { | |
471 | dev_err(dev, "failed to register input device: %d\n", error); | |
472 | return error; | |
473 | } | |
474 | ||
b1cfa7b4 | 475 | cyapa->input = input; |
d7e34d12 | 476 | return 0; |
d7e34d12 BL |
477 | } |
478 | ||
9f1cd857 DD |
479 | /* |
480 | * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time | |
481 | * | |
482 | * These are helper functions that convert to and from integer idle | |
483 | * times and register settings to write to the PowerMode register. | |
484 | * The trackpad supports between 20ms to 1000ms scan intervals. | |
485 | * The time will be increased in increments of 10ms from 20ms to 100ms. | |
486 | * From 100ms to 1000ms, time will be increased in increments of 20ms. | |
487 | * | |
488 | * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is: | |
489 | * Idle_Command = Idle Time / 10; | |
490 | * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is: | |
491 | * Idle_Command = Idle Time / 20 + 5; | |
492 | */ | |
493 | u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time) | |
494 | { | |
495 | u16 encoded_time; | |
496 | ||
497 | sleep_time = clamp_val(sleep_time, 20, 1000); | |
498 | encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5; | |
499 | return (encoded_time << 2) & PWR_MODE_MASK; | |
500 | } | |
501 | ||
502 | u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode) | |
503 | { | |
504 | u8 encoded_time = pwr_mode >> 2; | |
505 | ||
506 | return (encoded_time < 10) ? encoded_time * 10 | |
507 | : (encoded_time - 5) * 20; | |
508 | } | |
509 | ||
510 | /* 0 on driver initialize and detected successfully, negative on failure. */ | |
511 | static int cyapa_initialize(struct cyapa *cyapa) | |
512 | { | |
513 | int error = 0; | |
514 | ||
515 | cyapa->state = CYAPA_STATE_NO_DEVICE; | |
516 | cyapa->gen = CYAPA_GEN_UNKNOWN; | |
517 | mutex_init(&cyapa->state_sync_lock); | |
518 | ||
519 | /* | |
520 | * Set to hard code default, they will be updated with trackpad set | |
521 | * default values after probe and initialized. | |
522 | */ | |
523 | cyapa->suspend_power_mode = PWR_MODE_SLEEP; | |
524 | cyapa->suspend_sleep_time = | |
525 | cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode); | |
526 | ||
527 | /* ops.initialize() is aimed to prepare for module communications. */ | |
528 | error = cyapa_gen3_ops.initialize(cyapa); | |
6972a859 DD |
529 | if (!error) |
530 | error = cyapa_gen5_ops.initialize(cyapa); | |
9f1cd857 DD |
531 | if (error) |
532 | return error; | |
533 | ||
534 | error = cyapa_detect(cyapa); | |
535 | if (error) | |
536 | return error; | |
537 | ||
538 | /* Power down the device until we need it. */ | |
539 | if (cyapa->operational) | |
540 | cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | static int cyapa_reinitialize(struct cyapa *cyapa) | |
546 | { | |
547 | struct device *dev = &cyapa->client->dev; | |
548 | struct input_dev *input = cyapa->input; | |
549 | int error; | |
550 | ||
67286508 DD |
551 | if (pm_runtime_enabled(dev)) |
552 | pm_runtime_disable(dev); | |
553 | ||
9f1cd857 DD |
554 | /* Avoid command failures when TP was in OFF state. */ |
555 | if (cyapa->operational) | |
556 | cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0); | |
557 | ||
558 | error = cyapa_detect(cyapa); | |
559 | if (error) | |
560 | goto out; | |
561 | ||
562 | if (!input && cyapa->operational) { | |
563 | error = cyapa_create_input_dev(cyapa); | |
564 | if (error) { | |
565 | dev_err(dev, "create input_dev instance failed: %d\n", | |
566 | error); | |
567 | goto out; | |
568 | } | |
569 | } | |
570 | ||
571 | out: | |
572 | if (!input || !input->users) { | |
573 | /* Reset to power OFF state to save power when no user open. */ | |
574 | if (cyapa->operational) | |
575 | cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); | |
67286508 DD |
576 | } else if (!error && cyapa->operational) { |
577 | /* | |
578 | * Make sure only enable runtime PM when device is | |
579 | * in operational mode and input->users > 0. | |
580 | */ | |
581 | pm_runtime_set_active(dev); | |
582 | pm_runtime_enable(dev); | |
9f1cd857 DD |
583 | } |
584 | ||
585 | return error; | |
586 | } | |
587 | ||
588 | static irqreturn_t cyapa_irq(int irq, void *dev_id) | |
589 | { | |
590 | struct cyapa *cyapa = dev_id; | |
591 | struct device *dev = &cyapa->client->dev; | |
592 | ||
67286508 | 593 | pm_runtime_get_sync(dev); |
9f1cd857 DD |
594 | if (device_may_wakeup(dev)) |
595 | pm_wakeup_event(dev, 0); | |
596 | ||
597 | /* Interrupt event maybe cuased by host command to trackpad device. */ | |
598 | if (cyapa->ops->irq_cmd_handler(cyapa)) { | |
599 | /* | |
600 | * Interrupt event maybe from trackpad device input reporting. | |
601 | */ | |
602 | if (!cyapa->input) { | |
603 | /* | |
604 | * Still in probling or in firware image | |
605 | * udpating or reading. | |
606 | */ | |
607 | cyapa->ops->sort_empty_output_data(cyapa, | |
608 | NULL, NULL, NULL); | |
609 | goto out; | |
610 | } | |
611 | ||
612 | if (!cyapa->operational || cyapa->ops->irq_handler(cyapa)) { | |
613 | if (!mutex_trylock(&cyapa->state_sync_lock)) { | |
614 | cyapa->ops->sort_empty_output_data(cyapa, | |
615 | NULL, NULL, NULL); | |
616 | goto out; | |
617 | } | |
618 | cyapa_reinitialize(cyapa); | |
619 | mutex_unlock(&cyapa->state_sync_lock); | |
620 | } | |
621 | } | |
622 | ||
623 | out: | |
67286508 DD |
624 | pm_runtime_mark_last_busy(dev); |
625 | pm_runtime_put_sync_autosuspend(dev); | |
9f1cd857 DD |
626 | return IRQ_HANDLED; |
627 | } | |
628 | ||
22e7db81 DD |
629 | /* |
630 | ************************************************************** | |
631 | * sysfs interface | |
632 | ************************************************************** | |
633 | */ | |
634 | #ifdef CONFIG_PM_SLEEP | |
635 | static ssize_t cyapa_show_suspend_scanrate(struct device *dev, | |
636 | struct device_attribute *attr, | |
637 | char *buf) | |
638 | { | |
639 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
640 | u8 pwr_cmd = cyapa->suspend_power_mode; | |
641 | u16 sleep_time; | |
642 | int len; | |
643 | int error; | |
644 | ||
645 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
646 | if (error) | |
647 | return error; | |
648 | ||
649 | pwr_cmd = cyapa->suspend_power_mode; | |
650 | sleep_time = cyapa->suspend_sleep_time; | |
651 | ||
652 | mutex_unlock(&cyapa->state_sync_lock); | |
653 | ||
654 | switch (pwr_cmd) { | |
655 | case PWR_MODE_BTN_ONLY: | |
656 | len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME); | |
657 | break; | |
658 | ||
659 | case PWR_MODE_OFF: | |
660 | len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME); | |
661 | break; | |
662 | ||
663 | default: | |
664 | len = scnprintf(buf, PAGE_SIZE, "%u\n", | |
665 | cyapa->gen == CYAPA_GEN3 ? | |
666 | cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : | |
667 | sleep_time); | |
668 | break; | |
669 | } | |
670 | ||
671 | return len; | |
672 | } | |
673 | ||
674 | static ssize_t cyapa_update_suspend_scanrate(struct device *dev, | |
675 | struct device_attribute *attr, | |
676 | const char *buf, size_t count) | |
677 | { | |
678 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
679 | u16 sleep_time; | |
680 | int error; | |
681 | ||
682 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
683 | if (error) | |
684 | return error; | |
685 | ||
686 | if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) { | |
687 | cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY; | |
688 | } else if (sysfs_streq(buf, OFF_MODE_NAME)) { | |
689 | cyapa->suspend_power_mode = PWR_MODE_OFF; | |
690 | } else if (!kstrtou16(buf, 10, &sleep_time)) { | |
691 | cyapa->suspend_sleep_time = max_t(u16, sleep_time, 1000); | |
692 | cyapa->suspend_power_mode = | |
693 | cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time); | |
694 | } else { | |
695 | count = -EINVAL; | |
696 | } | |
697 | ||
698 | mutex_unlock(&cyapa->state_sync_lock); | |
699 | ||
700 | return count; | |
701 | } | |
702 | ||
703 | static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR, | |
704 | cyapa_show_suspend_scanrate, | |
705 | cyapa_update_suspend_scanrate); | |
706 | ||
707 | static struct attribute *cyapa_power_wakeup_entries[] = { | |
708 | &dev_attr_suspend_scanrate_ms.attr, | |
709 | NULL, | |
710 | }; | |
711 | ||
712 | static const struct attribute_group cyapa_power_wakeup_group = { | |
713 | .name = power_group_name, | |
714 | .attrs = cyapa_power_wakeup_entries, | |
715 | }; | |
716 | ||
717 | static void cyapa_remove_power_wakeup_group(void *data) | |
718 | { | |
719 | struct cyapa *cyapa = data; | |
720 | ||
721 | sysfs_unmerge_group(&cyapa->client->dev.kobj, | |
722 | &cyapa_power_wakeup_group); | |
723 | } | |
724 | ||
725 | static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) | |
726 | { | |
727 | struct i2c_client *client = cyapa->client; | |
728 | struct device *dev = &client->dev; | |
729 | int error; | |
730 | ||
731 | if (device_can_wakeup(dev)) { | |
732 | error = sysfs_merge_group(&client->dev.kobj, | |
733 | &cyapa_power_wakeup_group); | |
734 | if (error) { | |
735 | dev_err(dev, "failed to add power wakeup group: %d\n", | |
736 | error); | |
737 | return error; | |
738 | } | |
739 | ||
740 | error = devm_add_action(dev, | |
741 | cyapa_remove_power_wakeup_group, cyapa); | |
742 | if (error) { | |
743 | cyapa_remove_power_wakeup_group(cyapa); | |
744 | dev_err(dev, "failed to add power cleanup action: %d\n", | |
745 | error); | |
746 | return error; | |
747 | } | |
748 | } | |
749 | ||
750 | return 0; | |
751 | } | |
752 | #else | |
753 | static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) | |
754 | { | |
755 | return 0; | |
756 | } | |
757 | #endif /* CONFIG_PM_SLEEP */ | |
758 | ||
67286508 DD |
759 | #ifdef CONFIG_PM |
760 | static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev, | |
761 | struct device_attribute *attr, | |
762 | char *buf) | |
763 | { | |
764 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
765 | u8 pwr_cmd; | |
766 | u16 sleep_time; | |
767 | int error; | |
768 | ||
769 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
770 | if (error) | |
771 | return error; | |
772 | ||
773 | pwr_cmd = cyapa->runtime_suspend_power_mode; | |
774 | sleep_time = cyapa->runtime_suspend_sleep_time; | |
775 | ||
776 | mutex_unlock(&cyapa->state_sync_lock); | |
777 | ||
778 | return scnprintf(buf, PAGE_SIZE, "%u\n", | |
779 | cyapa->gen == CYAPA_GEN3 ? | |
780 | cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : | |
781 | sleep_time); | |
782 | } | |
783 | ||
784 | static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev, | |
785 | struct device_attribute *attr, | |
786 | const char *buf, size_t count) | |
787 | { | |
788 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
789 | u16 time; | |
790 | int error; | |
791 | ||
792 | if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) { | |
793 | dev_err(dev, "invalid runtime suspend scanrate ms parameter\n"); | |
794 | return -EINVAL; | |
795 | } | |
796 | ||
797 | /* | |
798 | * When the suspend scanrate is changed, pm_runtime_get to resume | |
799 | * a potentially suspended device, update to the new pwr_cmd | |
800 | * and then pm_runtime_put to suspend into the new power mode. | |
801 | */ | |
802 | pm_runtime_get_sync(dev); | |
803 | ||
804 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
805 | if (error) | |
806 | return error; | |
807 | ||
808 | cyapa->runtime_suspend_sleep_time = max_t(u16, time, 1000); | |
809 | cyapa->runtime_suspend_power_mode = | |
810 | cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time); | |
811 | ||
812 | mutex_unlock(&cyapa->state_sync_lock); | |
813 | ||
814 | pm_runtime_put_sync_autosuspend(dev); | |
815 | ||
816 | return count; | |
817 | } | |
818 | ||
819 | static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR, | |
820 | cyapa_show_rt_suspend_scanrate, | |
821 | cyapa_update_rt_suspend_scanrate); | |
822 | ||
823 | static struct attribute *cyapa_power_runtime_entries[] = { | |
824 | &dev_attr_runtime_suspend_scanrate_ms.attr, | |
825 | NULL, | |
826 | }; | |
827 | ||
828 | static const struct attribute_group cyapa_power_runtime_group = { | |
829 | .name = power_group_name, | |
830 | .attrs = cyapa_power_runtime_entries, | |
831 | }; | |
832 | ||
833 | static void cyapa_remove_power_runtime_group(void *data) | |
834 | { | |
835 | struct cyapa *cyapa = data; | |
836 | ||
837 | sysfs_unmerge_group(&cyapa->client->dev.kobj, | |
838 | &cyapa_power_runtime_group); | |
839 | } | |
840 | ||
841 | static int cyapa_start_runtime(struct cyapa *cyapa) | |
842 | { | |
843 | struct device *dev = &cyapa->client->dev; | |
844 | int error; | |
845 | ||
846 | cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE; | |
847 | cyapa->runtime_suspend_sleep_time = | |
848 | cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode); | |
849 | ||
850 | error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group); | |
851 | if (error) { | |
852 | dev_err(dev, | |
853 | "failed to create power runtime group: %d\n", error); | |
854 | return error; | |
855 | } | |
856 | ||
857 | error = devm_add_action(dev, cyapa_remove_power_runtime_group, cyapa); | |
858 | if (error) { | |
859 | cyapa_remove_power_runtime_group(cyapa); | |
860 | dev_err(dev, | |
861 | "failed to add power runtime cleanup action: %d\n", | |
862 | error); | |
863 | return error; | |
864 | } | |
865 | ||
866 | /* runtime is enabled until device is operational and opened. */ | |
867 | pm_runtime_set_suspended(dev); | |
868 | pm_runtime_use_autosuspend(dev); | |
869 | pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY); | |
870 | ||
871 | return 0; | |
872 | } | |
873 | #else | |
874 | static inline int cyapa_start_runtime(struct cyapa *cyapa) | |
875 | { | |
876 | return 0; | |
877 | } | |
878 | #endif /* CONFIG_PM */ | |
879 | ||
d7e34d12 BL |
880 | static int cyapa_probe(struct i2c_client *client, |
881 | const struct i2c_device_id *dev_id) | |
882 | { | |
d7e34d12 | 883 | struct device *dev = &client->dev; |
b1cfa7b4 DD |
884 | struct cyapa *cyapa; |
885 | u8 adapter_func; | |
9f1cd857 | 886 | union i2c_smbus_data dummy; |
b1cfa7b4 | 887 | int error; |
d7e34d12 | 888 | |
6ddaf744 BL |
889 | adapter_func = cyapa_check_adapter_functionality(client); |
890 | if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) { | |
891 | dev_err(dev, "not a supported I2C/SMBus adapter\n"); | |
892 | return -EIO; | |
893 | } | |
894 | ||
9f1cd857 DD |
895 | /* Make sure there is something at this address */ |
896 | if (i2c_smbus_xfer(client->adapter, client->addr, 0, | |
897 | I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) | |
898 | return -ENODEV; | |
899 | ||
b1cfa7b4 DD |
900 | cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL); |
901 | if (!cyapa) | |
d7e34d12 | 902 | return -ENOMEM; |
d7e34d12 | 903 | |
6ddaf744 BL |
904 | /* i2c isn't supported, use smbus */ |
905 | if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS) | |
906 | cyapa->smbus = true; | |
b1cfa7b4 | 907 | |
9f1cd857 DD |
908 | cyapa->client = client; |
909 | i2c_set_clientdata(client, cyapa); | |
910 | sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr, | |
911 | client->addr); | |
d7e34d12 | 912 | |
9f1cd857 | 913 | error = cyapa_initialize(cyapa); |
b1cfa7b4 | 914 | if (error) { |
9f1cd857 | 915 | dev_err(dev, "failed to detect and initialize tp device.\n"); |
b1cfa7b4 | 916 | return error; |
d7e34d12 BL |
917 | } |
918 | ||
22e7db81 DD |
919 | error = cyapa_prepare_wakeup_controls(cyapa); |
920 | if (error) { | |
921 | dev_err(dev, "failed to prepare wakeup controls: %d\n", error); | |
922 | return error; | |
923 | } | |
924 | ||
67286508 DD |
925 | error = cyapa_start_runtime(cyapa); |
926 | if (error) { | |
927 | dev_err(dev, "failed to start pm_runtime: %d\n", error); | |
928 | return error; | |
929 | } | |
930 | ||
b1cfa7b4 DD |
931 | error = devm_request_threaded_irq(dev, client->irq, |
932 | NULL, cyapa_irq, | |
933 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, | |
934 | "cyapa", cyapa); | |
935 | if (error) { | |
823a11fd | 936 | dev_err(dev, "failed to request threaded irq: %d\n", error); |
b1cfa7b4 | 937 | return error; |
d7e34d12 BL |
938 | } |
939 | ||
b1cfa7b4 DD |
940 | /* Disable IRQ until the device is opened */ |
941 | disable_irq(client->irq); | |
d7e34d12 | 942 | |
9f1cd857 DD |
943 | /* |
944 | * Register the device in the input subsystem when it's operational. | |
945 | * Otherwise, keep in this driver, so it can be be recovered or updated | |
946 | * through the sysfs mode and update_fw interfaces by user or apps. | |
947 | */ | |
948 | if (cyapa->operational) { | |
949 | error = cyapa_create_input_dev(cyapa); | |
950 | if (error) { | |
951 | dev_err(dev, "create input_dev instance failed: %d\n", | |
952 | error); | |
953 | return error; | |
954 | } | |
b1cfa7b4 | 955 | } |
d7e34d12 BL |
956 | |
957 | return 0; | |
958 | } | |
959 | ||
572081a4 | 960 | static int __maybe_unused cyapa_suspend(struct device *dev) |
d7e34d12 | 961 | { |
b1cfa7b4 DD |
962 | struct i2c_client *client = to_i2c_client(dev); |
963 | struct cyapa *cyapa = i2c_get_clientdata(client); | |
d7e34d12 | 964 | u8 power_mode; |
b1cfa7b4 DD |
965 | int error; |
966 | ||
9f1cd857 | 967 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); |
b1cfa7b4 DD |
968 | if (error) |
969 | return error; | |
d7e34d12 | 970 | |
67286508 DD |
971 | /* |
972 | * Runtime PM is enable only when device is in operational mode and | |
973 | * users in use, so need check it before disable it to | |
974 | * avoid unbalance warning. | |
975 | */ | |
976 | if (pm_runtime_enabled(dev)) | |
977 | pm_runtime_disable(dev); | |
b1cfa7b4 | 978 | disable_irq(client->irq); |
d7e34d12 BL |
979 | |
980 | /* | |
981 | * Set trackpad device to idle mode if wakeup is allowed, | |
982 | * otherwise turn off. | |
983 | */ | |
9f1cd857 DD |
984 | if (cyapa->operational) { |
985 | power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode | |
986 | : PWR_MODE_OFF; | |
987 | error = cyapa->ops->set_power_mode(cyapa, power_mode, | |
988 | cyapa->suspend_sleep_time); | |
989 | if (error) | |
990 | dev_err(dev, "suspend set power mode failed: %d\n", | |
991 | error); | |
992 | } | |
d7e34d12 BL |
993 | |
994 | if (device_may_wakeup(dev)) | |
f68a95cd | 995 | cyapa->irq_wake = (enable_irq_wake(client->irq) == 0); |
b1cfa7b4 | 996 | |
9f1cd857 | 997 | mutex_unlock(&cyapa->state_sync_lock); |
d7e34d12 BL |
998 | return 0; |
999 | } | |
1000 | ||
572081a4 | 1001 | static int __maybe_unused cyapa_resume(struct device *dev) |
d7e34d12 | 1002 | { |
b1cfa7b4 DD |
1003 | struct i2c_client *client = to_i2c_client(dev); |
1004 | struct cyapa *cyapa = i2c_get_clientdata(client); | |
b1cfa7b4 DD |
1005 | int error; |
1006 | ||
9f1cd857 | 1007 | mutex_lock(&cyapa->state_sync_lock); |
d7e34d12 | 1008 | |
9f1cd857 | 1009 | if (device_may_wakeup(dev) && cyapa->irq_wake) { |
f68a95cd | 1010 | disable_irq_wake(client->irq); |
9f1cd857 DD |
1011 | cyapa->irq_wake = false; |
1012 | } | |
d7e34d12 | 1013 | |
67286508 | 1014 | /* Update device states and runtime PM states. */ |
9f1cd857 | 1015 | error = cyapa_reinitialize(cyapa); |
b1cfa7b4 | 1016 | if (error) |
9f1cd857 | 1017 | dev_warn(dev, "failed to reinitialize TP device: %d\n", error); |
d7e34d12 | 1018 | |
f68a95cd | 1019 | enable_irq(client->irq); |
b1cfa7b4 | 1020 | |
9f1cd857 | 1021 | mutex_unlock(&cyapa->state_sync_lock); |
d7e34d12 BL |
1022 | return 0; |
1023 | } | |
d7e34d12 | 1024 | |
67286508 DD |
1025 | static int __maybe_unused cyapa_runtime_suspend(struct device *dev) |
1026 | { | |
1027 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1028 | int error; | |
1029 | ||
1030 | error = cyapa->ops->set_power_mode(cyapa, | |
1031 | cyapa->runtime_suspend_power_mode, | |
1032 | cyapa->runtime_suspend_sleep_time); | |
1033 | if (error) | |
1034 | dev_warn(dev, "runtime suspend failed: %d\n", error); | |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | static int __maybe_unused cyapa_runtime_resume(struct device *dev) | |
1040 | { | |
1041 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1042 | int error; | |
1043 | ||
1044 | error = cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0); | |
1045 | if (error) | |
1046 | dev_warn(dev, "runtime resume failed: %d\n", error); | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static const struct dev_pm_ops cyapa_pm_ops = { | |
1052 | SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume) | |
1053 | SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL) | |
1054 | }; | |
d7e34d12 BL |
1055 | |
1056 | static const struct i2c_device_id cyapa_id_table[] = { | |
1057 | { "cyapa", 0 }, | |
1058 | { }, | |
1059 | }; | |
1060 | MODULE_DEVICE_TABLE(i2c, cyapa_id_table); | |
1061 | ||
1062 | static struct i2c_driver cyapa_driver = { | |
1063 | .driver = { | |
1064 | .name = "cyapa", | |
1065 | .owner = THIS_MODULE, | |
1066 | .pm = &cyapa_pm_ops, | |
1067 | }, | |
1068 | ||
1069 | .probe = cyapa_probe, | |
d7e34d12 BL |
1070 | .id_table = cyapa_id_table, |
1071 | }; | |
1072 | ||
1073 | module_i2c_driver(cyapa_driver); | |
1074 | ||
1075 | MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver"); | |
1076 | MODULE_AUTHOR("Dudley Du <dudl@cypress.com>"); | |
1077 | MODULE_LICENSE("GPL"); |