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Commit | Line | Data |
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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 | * | |
94897619 | 9 | * Copyright (C) 2011-2015 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> |
36e9615b | 24 | #include <linux/regulator/consumer.h> |
d7e34d12 | 25 | #include <linux/slab.h> |
9f1cd857 | 26 | #include <linux/uaccess.h> |
67286508 | 27 | #include <linux/pm_runtime.h> |
7b2171d7 | 28 | #include <linux/acpi.h> |
ddbb299d | 29 | #include <linux/of.h> |
9f1cd857 | 30 | #include "cyapa.h" |
d7e34d12 | 31 | |
d7e34d12 | 32 | |
6ddaf744 BL |
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 | ||
c806b0b8 DD |
38 | #define CYAPA_FW_NAME "cyapa.bin" |
39 | ||
9f1cd857 | 40 | const char product_id[] = "CYTRA"; |
d7e34d12 | 41 | |
9f1cd857 | 42 | static int cyapa_reinitialize(struct cyapa *cyapa); |
6ddaf744 | 43 | |
94897619 | 44 | bool cyapa_is_pip_bl_mode(struct cyapa *cyapa) |
d7e34d12 | 45 | { |
c2c06c41 DD |
46 | if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_BL) |
47 | return true; | |
48 | ||
9f1cd857 DD |
49 | if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_BL) |
50 | return true; | |
51 | ||
94897619 DD |
52 | return false; |
53 | } | |
54 | ||
55 | bool cyapa_is_pip_app_mode(struct cyapa *cyapa) | |
56 | { | |
c2c06c41 DD |
57 | if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_APP) |
58 | return true; | |
59 | ||
94897619 DD |
60 | if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_APP) |
61 | return true; | |
62 | ||
63 | return false; | |
64 | } | |
65 | ||
66 | static bool cyapa_is_bootloader_mode(struct cyapa *cyapa) | |
67 | { | |
68 | if (cyapa_is_pip_bl_mode(cyapa)) | |
69 | return true; | |
70 | ||
9f1cd857 DD |
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; | |
d7e34d12 BL |
77 | } |
78 | ||
9f1cd857 | 79 | static inline bool cyapa_is_operational_mode(struct cyapa *cyapa) |
d7e34d12 | 80 | { |
94897619 | 81 | if (cyapa_is_pip_app_mode(cyapa)) |
9f1cd857 DD |
82 | return true; |
83 | ||
84 | if (cyapa->gen == CYAPA_GEN3 && cyapa->state == CYAPA_STATE_OP) | |
85 | return true; | |
86 | ||
87 | return false; | |
d7e34d12 BL |
88 | } |
89 | ||
9f1cd857 DD |
90 | /* Returns 0 on success, else negative errno on failure. */ |
91 | static ssize_t cyapa_i2c_read(struct cyapa *cyapa, u8 reg, size_t len, | |
92 | u8 *values) | |
6ddaf744 | 93 | { |
6ddaf744 | 94 | struct i2c_client *client = cyapa->client; |
9f1cd857 DD |
95 | struct i2c_msg msgs[] = { |
96 | { | |
97 | .addr = client->addr, | |
98 | .flags = 0, | |
99 | .len = 1, | |
100 | .buf = ®, | |
101 | }, | |
102 | { | |
103 | .addr = client->addr, | |
104 | .flags = I2C_M_RD, | |
105 | .len = len, | |
106 | .buf = values, | |
107 | }, | |
108 | }; | |
109 | int ret; | |
6ddaf744 | 110 | |
9f1cd857 | 111 | ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); |
6ddaf744 | 112 | |
9f1cd857 DD |
113 | if (ret != ARRAY_SIZE(msgs)) |
114 | return ret < 0 ? ret : -EIO; | |
6ddaf744 | 115 | |
9f1cd857 | 116 | return 0; |
6ddaf744 BL |
117 | } |
118 | ||
9f1cd857 DD |
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 | */ | |
128 | static int cyapa_i2c_write(struct cyapa *cyapa, u8 reg, | |
129 | size_t len, const void *values) | |
d7e34d12 | 130 | { |
9f1cd857 DD |
131 | struct i2c_client *client = cyapa->client; |
132 | char buf[32]; | |
133 | int ret; | |
d7e34d12 | 134 | |
9f1cd857 DD |
135 | if (len > sizeof(buf) - 1) |
136 | return -ENOMEM; | |
d7e34d12 | 137 | |
9f1cd857 DD |
138 | buf[0] = reg; |
139 | memcpy(&buf[1], values, len); | |
d7e34d12 | 140 | |
9f1cd857 DD |
141 | ret = i2c_master_send(client, buf, len + 1); |
142 | if (ret != len + 1) | |
143 | return ret < 0 ? ret : -EIO; | |
144 | ||
145 | return 0; | |
d7e34d12 BL |
146 | } |
147 | ||
9f1cd857 | 148 | static u8 cyapa_check_adapter_functionality(struct i2c_client *client) |
d7e34d12 | 149 | { |
9f1cd857 | 150 | u8 ret = CYAPA_ADAPTER_FUNC_NONE; |
d7e34d12 | 151 | |
9f1cd857 DD |
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; | |
d7e34d12 BL |
159 | } |
160 | ||
161 | /* | |
162 | * Query device for its current operating state. | |
d7e34d12 BL |
163 | */ |
164 | static int cyapa_get_state(struct cyapa *cyapa) | |
165 | { | |
d7e34d12 | 166 | u8 status[BL_STATUS_SIZE]; |
9f1cd857 DD |
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; | |
823a11fd | 172 | int error; |
d7e34d12 BL |
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 | */ | |
823a11fd | 182 | error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE, |
9f1cd857 | 183 | status); |
6ddaf744 BL |
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 | */ | |
9f1cd857 DD |
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 | } | |
6ddaf744 | 196 | |
823a11fd | 197 | if (error != BL_STATUS_SIZE) |
d7e34d12 BL |
198 | goto error; |
199 | ||
9f1cd857 DD |
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; | |
d7e34d12 | 214 | } |
c2c06c41 DD |
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. */ | |
6972a859 DD |
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 | } | |
d7e34d12 | 232 | |
9f1cd857 DD |
233 | /* |
234 | * Write 0x00 0x00 to trackpad device to force update its | |
235 | * status, then redo the detection again. | |
236 | */ | |
237 | if (!smbus) { | |
238 | cmd[0] = 0x00; | |
239 | cmd[1] = 0x00; | |
240 | error = cyapa_i2c_write(cyapa, 0, 2, cmd); | |
241 | if (error) | |
242 | goto error; | |
243 | ||
244 | msleep(50); | |
245 | ||
246 | error = cyapa_i2c_read(cyapa, BL_HEAD_OFFSET, | |
247 | BL_STATUS_SIZE, status); | |
248 | if (error) | |
249 | goto error; | |
250 | } | |
251 | } while (--retries > 0 && !smbus); | |
252 | ||
253 | goto error; | |
254 | ||
255 | out_detected: | |
256 | if (cyapa->state <= CYAPA_STATE_BL_BUSY) | |
257 | return -EAGAIN; | |
d7e34d12 | 258 | return 0; |
9f1cd857 | 259 | |
d7e34d12 | 260 | error: |
823a11fd | 261 | return (error < 0) ? error : -EAGAIN; |
d7e34d12 BL |
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) | |
9f1cd857 DD |
276 | * -EAGAIN if bootload is busy, or unknown state. |
277 | * < 0 other errors | |
d7e34d12 | 278 | */ |
9f1cd857 | 279 | int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout) |
d7e34d12 | 280 | { |
823a11fd | 281 | int error; |
d7e34d12 BL |
282 | int tries = timeout / 100; |
283 | ||
9f1cd857 | 284 | do { |
823a11fd | 285 | error = cyapa_get_state(cyapa); |
9f1cd857 DD |
286 | if (!error && cyapa->state > CYAPA_STATE_BL_BUSY) |
287 | return 0; | |
d7e34d12 | 288 | |
9f1cd857 DD |
289 | msleep(100); |
290 | } while (tries--); | |
d7e34d12 | 291 | |
9f1cd857 | 292 | return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error; |
d7e34d12 BL |
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: | |
9f1cd857 | 302 | * -ENODEV no device |
d7e34d12 BL |
303 | * -EBUSY no device or in bootloader |
304 | * -EIO failure while reading from device | |
9f1cd857 | 305 | * -ETIMEDOUT timeout failure for bus idle or bus no response |
d7e34d12 BL |
306 | * -EAGAIN device is still in bootloader |
307 | * if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware | |
308 | * -EINVAL device is in operational mode, but not supported by this driver | |
309 | * 0 device is supported | |
310 | */ | |
311 | static int cyapa_check_is_operational(struct cyapa *cyapa) | |
312 | { | |
823a11fd | 313 | int error; |
d7e34d12 | 314 | |
9f1cd857 | 315 | error = cyapa_poll_state(cyapa, 4000); |
823a11fd DD |
316 | if (error) |
317 | return error; | |
d7e34d12 | 318 | |
9f1cd857 | 319 | switch (cyapa->gen) { |
c2c06c41 DD |
320 | case CYAPA_GEN6: |
321 | cyapa->ops = &cyapa_gen6_ops; | |
322 | break; | |
6972a859 DD |
323 | case CYAPA_GEN5: |
324 | cyapa->ops = &cyapa_gen5_ops; | |
325 | break; | |
9f1cd857 DD |
326 | case CYAPA_GEN3: |
327 | cyapa->ops = &cyapa_gen3_ops; | |
328 | break; | |
d7e34d12 | 329 | default: |
9f1cd857 | 330 | return -ENODEV; |
d7e34d12 | 331 | } |
9f1cd857 DD |
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; | |
d7e34d12 BL |
340 | } |
341 | ||
9f1cd857 DD |
342 | |
343 | /* | |
344 | * Returns 0 on device detected, negative errno on no device detected. | |
94897619 | 345 | * And when the device is detected and operational, it will be reset to |
9f1cd857 DD |
346 | * full power active mode automatically. |
347 | */ | |
348 | static int cyapa_detect(struct cyapa *cyapa) | |
d7e34d12 | 349 | { |
d7e34d12 | 350 | struct device *dev = &cyapa->client->dev; |
9f1cd857 | 351 | int error; |
d7e34d12 | 352 | |
9f1cd857 DD |
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 | } | |
d7e34d12 | 360 | |
9f1cd857 DD |
361 | dev_err(dev, "no device detected: %d\n", error); |
362 | return error; | |
d7e34d12 BL |
363 | } |
364 | ||
9f1cd857 | 365 | return 0; |
6ddaf744 BL |
366 | } |
367 | ||
b1cfa7b4 DD |
368 | static int cyapa_open(struct input_dev *input) |
369 | { | |
370 | struct cyapa *cyapa = input_get_drvdata(input); | |
371 | struct i2c_client *client = cyapa->client; | |
757cae5a | 372 | struct device *dev = &client->dev; |
b1cfa7b4 DD |
373 | int error; |
374 | ||
9f1cd857 DD |
375 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); |
376 | if (error) | |
b1cfa7b4 | 377 | return error; |
9f1cd857 DD |
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, | |
757cae5a | 386 | PWR_MODE_FULL_ACTIVE, 0, false); |
9f1cd857 | 387 | if (error) { |
757cae5a | 388 | dev_warn(dev, "set active power failed: %d\n", error); |
9f1cd857 DD |
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 | } | |
b1cfa7b4 DD |
397 | } |
398 | ||
399 | enable_irq(client->irq); | |
757cae5a DD |
400 | if (!pm_runtime_enabled(dev)) { |
401 | pm_runtime_set_active(dev); | |
402 | pm_runtime_enable(dev); | |
67286508 | 403 | } |
757cae5a DD |
404 | |
405 | pm_runtime_get_sync(dev); | |
406 | pm_runtime_mark_last_busy(dev); | |
407 | pm_runtime_put_sync_autosuspend(dev); | |
9f1cd857 DD |
408 | out: |
409 | mutex_unlock(&cyapa->state_sync_lock); | |
410 | return error; | |
b1cfa7b4 DD |
411 | } |
412 | ||
413 | static void cyapa_close(struct input_dev *input) | |
414 | { | |
415 | struct cyapa *cyapa = input_get_drvdata(input); | |
9f1cd857 | 416 | struct i2c_client *client = cyapa->client; |
757cae5a | 417 | struct device *dev = &cyapa->client->dev; |
9f1cd857 DD |
418 | |
419 | mutex_lock(&cyapa->state_sync_lock); | |
b1cfa7b4 | 420 | |
9f1cd857 | 421 | disable_irq(client->irq); |
757cae5a DD |
422 | if (pm_runtime_enabled(dev)) |
423 | pm_runtime_disable(dev); | |
424 | pm_runtime_set_suspended(dev); | |
67286508 | 425 | |
9f1cd857 | 426 | if (cyapa->operational) |
757cae5a | 427 | cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0, false); |
9f1cd857 DD |
428 | |
429 | mutex_unlock(&cyapa->state_sync_lock); | |
b1cfa7b4 DD |
430 | } |
431 | ||
d7e34d12 BL |
432 | static int cyapa_create_input_dev(struct cyapa *cyapa) |
433 | { | |
434 | struct device *dev = &cyapa->client->dev; | |
d7e34d12 | 435 | struct input_dev *input; |
b1cfa7b4 | 436 | int error; |
d7e34d12 BL |
437 | |
438 | if (!cyapa->physical_size_x || !cyapa->physical_size_y) | |
439 | return -EINVAL; | |
440 | ||
b1cfa7b4 | 441 | input = devm_input_allocate_device(dev); |
d7e34d12 | 442 | if (!input) { |
823a11fd | 443 | dev_err(dev, "failed to allocate memory for input device.\n"); |
d7e34d12 BL |
444 | return -ENOMEM; |
445 | } | |
446 | ||
447 | input->name = CYAPA_NAME; | |
448 | input->phys = cyapa->phys; | |
449 | input->id.bustype = BUS_I2C; | |
450 | input->id.version = 1; | |
823a11fd | 451 | input->id.product = 0; /* Means any product in eventcomm. */ |
d7e34d12 BL |
452 | input->dev.parent = &cyapa->client->dev; |
453 | ||
b1cfa7b4 DD |
454 | input->open = cyapa_open; |
455 | input->close = cyapa_close; | |
456 | ||
d7e34d12 BL |
457 | input_set_drvdata(input, cyapa); |
458 | ||
459 | __set_bit(EV_ABS, input->evbit); | |
460 | ||
823a11fd | 461 | /* Finger position */ |
d7e34d12 BL |
462 | input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0, |
463 | 0); | |
464 | input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0, | |
465 | 0); | |
9f1cd857 DD |
466 | input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0); |
467 | if (cyapa->gen > CYAPA_GEN3) { | |
468 | input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); | |
469 | input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); | |
470 | /* | |
471 | * Orientation is the angle between the vertical axis and | |
472 | * the major axis of the contact ellipse. | |
473 | * The range is -127 to 127. | |
474 | * the positive direction is clockwise form the vertical axis. | |
475 | * If the ellipse of contact degenerates into a circle, | |
476 | * orientation is reported as 0. | |
477 | * | |
478 | * Also, for Gen5 trackpad the accurate of this orientation | |
479 | * value is value + (-30 ~ 30). | |
480 | */ | |
481 | input_set_abs_params(input, ABS_MT_ORIENTATION, | |
482 | -127, 127, 0, 0); | |
483 | } | |
484 | if (cyapa->gen >= CYAPA_GEN5) { | |
485 | input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); | |
486 | input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0); | |
945525ee | 487 | input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0); |
9f1cd857 | 488 | } |
d7e34d12 BL |
489 | |
490 | input_abs_set_res(input, ABS_MT_POSITION_X, | |
491 | cyapa->max_abs_x / cyapa->physical_size_x); | |
492 | input_abs_set_res(input, ABS_MT_POSITION_Y, | |
493 | cyapa->max_abs_y / cyapa->physical_size_y); | |
494 | ||
495 | if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) | |
496 | __set_bit(BTN_LEFT, input->keybit); | |
497 | if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) | |
498 | __set_bit(BTN_MIDDLE, input->keybit); | |
499 | if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) | |
500 | __set_bit(BTN_RIGHT, input->keybit); | |
501 | ||
502 | if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK) | |
503 | __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); | |
504 | ||
823a11fd | 505 | /* Handle pointer emulation and unused slots in core */ |
b1cfa7b4 DD |
506 | error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS, |
507 | INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); | |
508 | if (error) { | |
509 | dev_err(dev, "failed to initialize MT slots: %d\n", error); | |
510 | return error; | |
d7e34d12 BL |
511 | } |
512 | ||
9f1cd857 DD |
513 | /* Register the device in input subsystem */ |
514 | error = input_register_device(input); | |
515 | if (error) { | |
516 | dev_err(dev, "failed to register input device: %d\n", error); | |
517 | return error; | |
518 | } | |
519 | ||
b1cfa7b4 | 520 | cyapa->input = input; |
d7e34d12 | 521 | return 0; |
d7e34d12 BL |
522 | } |
523 | ||
c806b0b8 DD |
524 | static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa) |
525 | { | |
526 | struct input_dev *input = cyapa->input; | |
527 | ||
528 | if (!input || !input->users) { | |
529 | /* | |
530 | * When input is NULL, TP must be in deep sleep mode. | |
531 | * In this mode, later non-power I2C command will always failed | |
532 | * if not bring it out of deep sleep mode firstly, | |
533 | * so must command TP to active mode here. | |
534 | */ | |
535 | if (!input || cyapa->operational) | |
536 | cyapa->ops->set_power_mode(cyapa, | |
757cae5a | 537 | PWR_MODE_FULL_ACTIVE, 0, false); |
c806b0b8 DD |
538 | /* Gen3 always using polling mode for command. */ |
539 | if (cyapa->gen >= CYAPA_GEN5) | |
540 | enable_irq(cyapa->client->irq); | |
541 | } | |
542 | } | |
543 | ||
544 | static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa) | |
545 | { | |
546 | struct input_dev *input = cyapa->input; | |
547 | ||
548 | if (!input || !input->users) { | |
549 | if (cyapa->gen >= CYAPA_GEN5) | |
550 | disable_irq(cyapa->client->irq); | |
551 | if (!input || cyapa->operational) | |
757cae5a DD |
552 | cyapa->ops->set_power_mode(cyapa, |
553 | PWR_MODE_OFF, 0, false); | |
c806b0b8 DD |
554 | } |
555 | } | |
556 | ||
9f1cd857 DD |
557 | /* |
558 | * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time | |
559 | * | |
560 | * These are helper functions that convert to and from integer idle | |
561 | * times and register settings to write to the PowerMode register. | |
562 | * The trackpad supports between 20ms to 1000ms scan intervals. | |
563 | * The time will be increased in increments of 10ms from 20ms to 100ms. | |
564 | * From 100ms to 1000ms, time will be increased in increments of 20ms. | |
565 | * | |
566 | * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is: | |
567 | * Idle_Command = Idle Time / 10; | |
568 | * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is: | |
569 | * Idle_Command = Idle Time / 20 + 5; | |
570 | */ | |
571 | u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time) | |
572 | { | |
573 | u16 encoded_time; | |
574 | ||
575 | sleep_time = clamp_val(sleep_time, 20, 1000); | |
576 | encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5; | |
577 | return (encoded_time << 2) & PWR_MODE_MASK; | |
578 | } | |
579 | ||
580 | u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode) | |
581 | { | |
582 | u8 encoded_time = pwr_mode >> 2; | |
583 | ||
584 | return (encoded_time < 10) ? encoded_time * 10 | |
585 | : (encoded_time - 5) * 20; | |
586 | } | |
587 | ||
588 | /* 0 on driver initialize and detected successfully, negative on failure. */ | |
589 | static int cyapa_initialize(struct cyapa *cyapa) | |
590 | { | |
591 | int error = 0; | |
592 | ||
593 | cyapa->state = CYAPA_STATE_NO_DEVICE; | |
594 | cyapa->gen = CYAPA_GEN_UNKNOWN; | |
595 | mutex_init(&cyapa->state_sync_lock); | |
596 | ||
597 | /* | |
598 | * Set to hard code default, they will be updated with trackpad set | |
599 | * default values after probe and initialized. | |
600 | */ | |
601 | cyapa->suspend_power_mode = PWR_MODE_SLEEP; | |
602 | cyapa->suspend_sleep_time = | |
603 | cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode); | |
604 | ||
605 | /* ops.initialize() is aimed to prepare for module communications. */ | |
606 | error = cyapa_gen3_ops.initialize(cyapa); | |
6972a859 DD |
607 | if (!error) |
608 | error = cyapa_gen5_ops.initialize(cyapa); | |
c2c06c41 DD |
609 | if (!error) |
610 | error = cyapa_gen6_ops.initialize(cyapa); | |
9f1cd857 DD |
611 | if (error) |
612 | return error; | |
613 | ||
614 | error = cyapa_detect(cyapa); | |
615 | if (error) | |
616 | return error; | |
617 | ||
618 | /* Power down the device until we need it. */ | |
619 | if (cyapa->operational) | |
757cae5a | 620 | cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0, false); |
9f1cd857 DD |
621 | |
622 | return 0; | |
623 | } | |
624 | ||
625 | static int cyapa_reinitialize(struct cyapa *cyapa) | |
626 | { | |
627 | struct device *dev = &cyapa->client->dev; | |
628 | struct input_dev *input = cyapa->input; | |
629 | int error; | |
630 | ||
67286508 DD |
631 | if (pm_runtime_enabled(dev)) |
632 | pm_runtime_disable(dev); | |
633 | ||
9f1cd857 DD |
634 | /* Avoid command failures when TP was in OFF state. */ |
635 | if (cyapa->operational) | |
757cae5a DD |
636 | cyapa->ops->set_power_mode(cyapa, |
637 | PWR_MODE_FULL_ACTIVE, 0, false); | |
9f1cd857 DD |
638 | |
639 | error = cyapa_detect(cyapa); | |
640 | if (error) | |
641 | goto out; | |
642 | ||
643 | if (!input && cyapa->operational) { | |
644 | error = cyapa_create_input_dev(cyapa); | |
645 | if (error) { | |
646 | dev_err(dev, "create input_dev instance failed: %d\n", | |
647 | error); | |
648 | goto out; | |
649 | } | |
650 | } | |
651 | ||
652 | out: | |
653 | if (!input || !input->users) { | |
654 | /* Reset to power OFF state to save power when no user open. */ | |
655 | if (cyapa->operational) | |
757cae5a DD |
656 | cyapa->ops->set_power_mode(cyapa, |
657 | PWR_MODE_OFF, 0, false); | |
67286508 DD |
658 | } else if (!error && cyapa->operational) { |
659 | /* | |
660 | * Make sure only enable runtime PM when device is | |
661 | * in operational mode and input->users > 0. | |
662 | */ | |
663 | pm_runtime_set_active(dev); | |
664 | pm_runtime_enable(dev); | |
757cae5a DD |
665 | |
666 | pm_runtime_get_sync(dev); | |
667 | pm_runtime_mark_last_busy(dev); | |
668 | pm_runtime_put_sync_autosuspend(dev); | |
9f1cd857 DD |
669 | } |
670 | ||
671 | return error; | |
672 | } | |
673 | ||
674 | static irqreturn_t cyapa_irq(int irq, void *dev_id) | |
675 | { | |
676 | struct cyapa *cyapa = dev_id; | |
677 | struct device *dev = &cyapa->client->dev; | |
757cae5a | 678 | int error; |
9f1cd857 DD |
679 | |
680 | if (device_may_wakeup(dev)) | |
681 | pm_wakeup_event(dev, 0); | |
682 | ||
94897619 | 683 | /* Interrupt event can be caused by host command to trackpad device. */ |
9f1cd857 DD |
684 | if (cyapa->ops->irq_cmd_handler(cyapa)) { |
685 | /* | |
686 | * Interrupt event maybe from trackpad device input reporting. | |
687 | */ | |
688 | if (!cyapa->input) { | |
689 | /* | |
94897619 DD |
690 | * Still in probing or in firmware image |
691 | * updating or reading. | |
9f1cd857 DD |
692 | */ |
693 | cyapa->ops->sort_empty_output_data(cyapa, | |
694 | NULL, NULL, NULL); | |
695 | goto out; | |
696 | } | |
697 | ||
757cae5a DD |
698 | if (cyapa->operational) { |
699 | error = cyapa->ops->irq_handler(cyapa); | |
700 | ||
701 | /* | |
702 | * Apply runtime power management to touch report event | |
703 | * except the events caused by the command responses. | |
704 | * Note: | |
705 | * It will introduce about 20~40 ms additional delay | |
706 | * time in receiving for first valid touch report data. | |
707 | * The time is used to execute device runtime resume | |
708 | * process. | |
709 | */ | |
710 | pm_runtime_get_sync(dev); | |
711 | pm_runtime_mark_last_busy(dev); | |
712 | pm_runtime_put_sync_autosuspend(dev); | |
713 | } | |
714 | ||
715 | if (!cyapa->operational || error) { | |
9f1cd857 DD |
716 | if (!mutex_trylock(&cyapa->state_sync_lock)) { |
717 | cyapa->ops->sort_empty_output_data(cyapa, | |
718 | NULL, NULL, NULL); | |
719 | goto out; | |
720 | } | |
721 | cyapa_reinitialize(cyapa); | |
722 | mutex_unlock(&cyapa->state_sync_lock); | |
723 | } | |
724 | } | |
725 | ||
726 | out: | |
727 | return IRQ_HANDLED; | |
728 | } | |
729 | ||
22e7db81 DD |
730 | /* |
731 | ************************************************************** | |
732 | * sysfs interface | |
733 | ************************************************************** | |
734 | */ | |
735 | #ifdef CONFIG_PM_SLEEP | |
736 | static ssize_t cyapa_show_suspend_scanrate(struct device *dev, | |
737 | struct device_attribute *attr, | |
738 | char *buf) | |
739 | { | |
740 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
741 | u8 pwr_cmd = cyapa->suspend_power_mode; | |
742 | u16 sleep_time; | |
743 | int len; | |
744 | int error; | |
745 | ||
746 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
747 | if (error) | |
748 | return error; | |
749 | ||
750 | pwr_cmd = cyapa->suspend_power_mode; | |
751 | sleep_time = cyapa->suspend_sleep_time; | |
752 | ||
753 | mutex_unlock(&cyapa->state_sync_lock); | |
754 | ||
755 | switch (pwr_cmd) { | |
756 | case PWR_MODE_BTN_ONLY: | |
757 | len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME); | |
758 | break; | |
759 | ||
760 | case PWR_MODE_OFF: | |
761 | len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME); | |
762 | break; | |
763 | ||
764 | default: | |
765 | len = scnprintf(buf, PAGE_SIZE, "%u\n", | |
766 | cyapa->gen == CYAPA_GEN3 ? | |
767 | cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : | |
768 | sleep_time); | |
769 | break; | |
770 | } | |
771 | ||
772 | return len; | |
773 | } | |
774 | ||
775 | static ssize_t cyapa_update_suspend_scanrate(struct device *dev, | |
776 | struct device_attribute *attr, | |
777 | const char *buf, size_t count) | |
778 | { | |
779 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
780 | u16 sleep_time; | |
781 | int error; | |
782 | ||
783 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
784 | if (error) | |
785 | return error; | |
786 | ||
787 | if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) { | |
788 | cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY; | |
789 | } else if (sysfs_streq(buf, OFF_MODE_NAME)) { | |
790 | cyapa->suspend_power_mode = PWR_MODE_OFF; | |
791 | } else if (!kstrtou16(buf, 10, &sleep_time)) { | |
a333a03c | 792 | cyapa->suspend_sleep_time = min_t(u16, sleep_time, 1000); |
22e7db81 DD |
793 | cyapa->suspend_power_mode = |
794 | cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time); | |
795 | } else { | |
796 | count = -EINVAL; | |
797 | } | |
798 | ||
799 | mutex_unlock(&cyapa->state_sync_lock); | |
800 | ||
801 | return count; | |
802 | } | |
803 | ||
804 | static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR, | |
805 | cyapa_show_suspend_scanrate, | |
806 | cyapa_update_suspend_scanrate); | |
807 | ||
808 | static struct attribute *cyapa_power_wakeup_entries[] = { | |
809 | &dev_attr_suspend_scanrate_ms.attr, | |
810 | NULL, | |
811 | }; | |
812 | ||
813 | static const struct attribute_group cyapa_power_wakeup_group = { | |
814 | .name = power_group_name, | |
815 | .attrs = cyapa_power_wakeup_entries, | |
816 | }; | |
817 | ||
818 | static void cyapa_remove_power_wakeup_group(void *data) | |
819 | { | |
820 | struct cyapa *cyapa = data; | |
821 | ||
822 | sysfs_unmerge_group(&cyapa->client->dev.kobj, | |
823 | &cyapa_power_wakeup_group); | |
824 | } | |
825 | ||
826 | static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) | |
827 | { | |
828 | struct i2c_client *client = cyapa->client; | |
829 | struct device *dev = &client->dev; | |
830 | int error; | |
831 | ||
832 | if (device_can_wakeup(dev)) { | |
833 | error = sysfs_merge_group(&client->dev.kobj, | |
834 | &cyapa_power_wakeup_group); | |
835 | if (error) { | |
836 | dev_err(dev, "failed to add power wakeup group: %d\n", | |
837 | error); | |
838 | return error; | |
839 | } | |
840 | ||
841 | error = devm_add_action(dev, | |
842 | cyapa_remove_power_wakeup_group, cyapa); | |
843 | if (error) { | |
844 | cyapa_remove_power_wakeup_group(cyapa); | |
845 | dev_err(dev, "failed to add power cleanup action: %d\n", | |
846 | error); | |
847 | return error; | |
848 | } | |
849 | } | |
850 | ||
851 | return 0; | |
852 | } | |
853 | #else | |
854 | static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) | |
855 | { | |
856 | return 0; | |
857 | } | |
858 | #endif /* CONFIG_PM_SLEEP */ | |
859 | ||
67286508 DD |
860 | #ifdef CONFIG_PM |
861 | static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev, | |
862 | struct device_attribute *attr, | |
863 | char *buf) | |
864 | { | |
865 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
866 | u8 pwr_cmd; | |
867 | u16 sleep_time; | |
868 | int error; | |
869 | ||
870 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
871 | if (error) | |
872 | return error; | |
873 | ||
874 | pwr_cmd = cyapa->runtime_suspend_power_mode; | |
875 | sleep_time = cyapa->runtime_suspend_sleep_time; | |
876 | ||
877 | mutex_unlock(&cyapa->state_sync_lock); | |
878 | ||
879 | return scnprintf(buf, PAGE_SIZE, "%u\n", | |
880 | cyapa->gen == CYAPA_GEN3 ? | |
881 | cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : | |
882 | sleep_time); | |
883 | } | |
884 | ||
885 | static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev, | |
886 | struct device_attribute *attr, | |
887 | const char *buf, size_t count) | |
888 | { | |
889 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
890 | u16 time; | |
891 | int error; | |
892 | ||
893 | if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) { | |
894 | dev_err(dev, "invalid runtime suspend scanrate ms parameter\n"); | |
895 | return -EINVAL; | |
896 | } | |
897 | ||
898 | /* | |
899 | * When the suspend scanrate is changed, pm_runtime_get to resume | |
900 | * a potentially suspended device, update to the new pwr_cmd | |
901 | * and then pm_runtime_put to suspend into the new power mode. | |
902 | */ | |
903 | pm_runtime_get_sync(dev); | |
904 | ||
905 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
906 | if (error) | |
907 | return error; | |
908 | ||
a333a03c | 909 | cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000); |
67286508 DD |
910 | cyapa->runtime_suspend_power_mode = |
911 | cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time); | |
912 | ||
913 | mutex_unlock(&cyapa->state_sync_lock); | |
914 | ||
915 | pm_runtime_put_sync_autosuspend(dev); | |
916 | ||
917 | return count; | |
918 | } | |
919 | ||
920 | static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR, | |
921 | cyapa_show_rt_suspend_scanrate, | |
922 | cyapa_update_rt_suspend_scanrate); | |
923 | ||
924 | static struct attribute *cyapa_power_runtime_entries[] = { | |
925 | &dev_attr_runtime_suspend_scanrate_ms.attr, | |
926 | NULL, | |
927 | }; | |
928 | ||
929 | static const struct attribute_group cyapa_power_runtime_group = { | |
930 | .name = power_group_name, | |
931 | .attrs = cyapa_power_runtime_entries, | |
932 | }; | |
933 | ||
934 | static void cyapa_remove_power_runtime_group(void *data) | |
935 | { | |
936 | struct cyapa *cyapa = data; | |
937 | ||
938 | sysfs_unmerge_group(&cyapa->client->dev.kobj, | |
939 | &cyapa_power_runtime_group); | |
940 | } | |
941 | ||
942 | static int cyapa_start_runtime(struct cyapa *cyapa) | |
943 | { | |
944 | struct device *dev = &cyapa->client->dev; | |
945 | int error; | |
946 | ||
947 | cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE; | |
948 | cyapa->runtime_suspend_sleep_time = | |
949 | cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode); | |
950 | ||
951 | error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group); | |
952 | if (error) { | |
953 | dev_err(dev, | |
954 | "failed to create power runtime group: %d\n", error); | |
955 | return error; | |
956 | } | |
957 | ||
958 | error = devm_add_action(dev, cyapa_remove_power_runtime_group, cyapa); | |
959 | if (error) { | |
960 | cyapa_remove_power_runtime_group(cyapa); | |
961 | dev_err(dev, | |
962 | "failed to add power runtime cleanup action: %d\n", | |
963 | error); | |
964 | return error; | |
965 | } | |
966 | ||
967 | /* runtime is enabled until device is operational and opened. */ | |
968 | pm_runtime_set_suspended(dev); | |
969 | pm_runtime_use_autosuspend(dev); | |
970 | pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY); | |
971 | ||
972 | return 0; | |
973 | } | |
974 | #else | |
975 | static inline int cyapa_start_runtime(struct cyapa *cyapa) | |
976 | { | |
977 | return 0; | |
978 | } | |
979 | #endif /* CONFIG_PM */ | |
980 | ||
c806b0b8 DD |
981 | static ssize_t cyapa_show_fm_ver(struct device *dev, |
982 | struct device_attribute *attr, char *buf) | |
983 | { | |
984 | int error; | |
985 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
986 | ||
987 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
988 | if (error) | |
989 | return error; | |
990 | error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver, | |
991 | cyapa->fw_min_ver); | |
992 | mutex_unlock(&cyapa->state_sync_lock); | |
993 | return error; | |
994 | } | |
995 | ||
996 | static ssize_t cyapa_show_product_id(struct device *dev, | |
997 | struct device_attribute *attr, char *buf) | |
998 | { | |
999 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1000 | int size; | |
1001 | int error; | |
1002 | ||
1003 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
1004 | if (error) | |
1005 | return error; | |
1006 | size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id); | |
1007 | mutex_unlock(&cyapa->state_sync_lock); | |
1008 | return size; | |
1009 | } | |
1010 | ||
1011 | static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name) | |
1012 | { | |
1013 | struct device *dev = &cyapa->client->dev; | |
1014 | const struct firmware *fw; | |
1015 | int error; | |
1016 | ||
1017 | error = request_firmware(&fw, fw_name, dev); | |
1018 | if (error) { | |
1019 | dev_err(dev, "Could not load firmware from %s: %d\n", | |
1020 | fw_name, error); | |
1021 | return error; | |
1022 | } | |
1023 | ||
1024 | error = cyapa->ops->check_fw(cyapa, fw); | |
1025 | if (error) { | |
1026 | dev_err(dev, "Invalid CYAPA firmware image: %s\n", | |
1027 | fw_name); | |
1028 | goto done; | |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | * Resume the potentially suspended device because doing FW | |
1033 | * update on a device not in the FULL mode has a chance to | |
1034 | * fail. | |
1035 | */ | |
1036 | pm_runtime_get_sync(dev); | |
1037 | ||
1038 | /* Require IRQ support for firmware update commands. */ | |
1039 | cyapa_enable_irq_for_cmd(cyapa); | |
1040 | ||
1041 | error = cyapa->ops->bl_enter(cyapa); | |
1042 | if (error) { | |
1043 | dev_err(dev, "bl_enter failed, %d\n", error); | |
1044 | goto err_detect; | |
1045 | } | |
1046 | ||
1047 | error = cyapa->ops->bl_activate(cyapa); | |
1048 | if (error) { | |
1049 | dev_err(dev, "bl_activate failed, %d\n", error); | |
1050 | goto err_detect; | |
1051 | } | |
1052 | ||
1053 | error = cyapa->ops->bl_initiate(cyapa, fw); | |
1054 | if (error) { | |
1055 | dev_err(dev, "bl_initiate failed, %d\n", error); | |
1056 | goto err_detect; | |
1057 | } | |
1058 | ||
1059 | error = cyapa->ops->update_fw(cyapa, fw); | |
1060 | if (error) { | |
1061 | dev_err(dev, "update_fw failed, %d\n", error); | |
1062 | goto err_detect; | |
1063 | } | |
1064 | ||
1065 | err_detect: | |
1066 | cyapa_disable_irq_for_cmd(cyapa); | |
1067 | pm_runtime_put_noidle(dev); | |
1068 | ||
1069 | done: | |
1070 | release_firmware(fw); | |
1071 | return error; | |
1072 | } | |
1073 | ||
1074 | static ssize_t cyapa_update_fw_store(struct device *dev, | |
1075 | struct device_attribute *attr, | |
1076 | const char *buf, size_t count) | |
1077 | { | |
1078 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1079 | char fw_name[NAME_MAX]; | |
1080 | int ret, error; | |
1081 | ||
b4810773 | 1082 | if (count >= NAME_MAX) { |
c806b0b8 DD |
1083 | dev_err(dev, "File name too long\n"); |
1084 | return -EINVAL; | |
1085 | } | |
1086 | ||
1087 | memcpy(fw_name, buf, count); | |
1088 | if (fw_name[count - 1] == '\n') | |
1089 | fw_name[count - 1] = '\0'; | |
1090 | else | |
1091 | fw_name[count] = '\0'; | |
1092 | ||
1093 | if (cyapa->input) { | |
1094 | /* | |
1095 | * Force the input device to be registered after the firmware | |
1096 | * image is updated, so if the corresponding parameters updated | |
1097 | * in the new firmware image can taken effect immediately. | |
1098 | */ | |
1099 | input_unregister_device(cyapa->input); | |
1100 | cyapa->input = NULL; | |
1101 | } | |
1102 | ||
1103 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
1104 | if (error) { | |
1105 | /* | |
1106 | * Whatever, do reinitialize to try to recover TP state to | |
1107 | * previous state just as it entered fw update entrance. | |
1108 | */ | |
1109 | cyapa_reinitialize(cyapa); | |
1110 | return error; | |
1111 | } | |
1112 | ||
1113 | error = cyapa_firmware(cyapa, fw_name); | |
1114 | if (error) | |
1115 | dev_err(dev, "firmware update failed: %d\n", error); | |
1116 | else | |
1117 | dev_dbg(dev, "firmware update successfully done.\n"); | |
1118 | ||
1119 | /* | |
94897619 | 1120 | * Re-detect trackpad device states because firmware update process |
c806b0b8 DD |
1121 | * will reset trackpad device into bootloader mode. |
1122 | */ | |
1123 | ret = cyapa_reinitialize(cyapa); | |
1124 | if (ret) { | |
94897619 | 1125 | dev_err(dev, "failed to re-detect after updated: %d\n", ret); |
c806b0b8 DD |
1126 | error = error ? error : ret; |
1127 | } | |
1128 | ||
1129 | mutex_unlock(&cyapa->state_sync_lock); | |
1130 | ||
1131 | return error ? error : count; | |
1132 | } | |
1133 | ||
1134 | static ssize_t cyapa_calibrate_store(struct device *dev, | |
1135 | struct device_attribute *attr, | |
1136 | const char *buf, size_t count) | |
1137 | { | |
1138 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1139 | int error; | |
1140 | ||
1141 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
1142 | if (error) | |
1143 | return error; | |
1144 | ||
1145 | if (cyapa->operational) { | |
1146 | cyapa_enable_irq_for_cmd(cyapa); | |
1147 | error = cyapa->ops->calibrate_store(dev, attr, buf, count); | |
1148 | cyapa_disable_irq_for_cmd(cyapa); | |
1149 | } else { | |
1150 | error = -EBUSY; /* Still running in bootloader mode. */ | |
1151 | } | |
1152 | ||
1153 | mutex_unlock(&cyapa->state_sync_lock); | |
1154 | return error < 0 ? error : count; | |
1155 | } | |
1156 | ||
1157 | static ssize_t cyapa_show_baseline(struct device *dev, | |
1158 | struct device_attribute *attr, char *buf) | |
1159 | { | |
1160 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1161 | ssize_t error; | |
1162 | ||
1163 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
1164 | if (error) | |
1165 | return error; | |
1166 | ||
1167 | if (cyapa->operational) { | |
1168 | cyapa_enable_irq_for_cmd(cyapa); | |
1169 | error = cyapa->ops->show_baseline(dev, attr, buf); | |
1170 | cyapa_disable_irq_for_cmd(cyapa); | |
1171 | } else { | |
1172 | error = -EBUSY; /* Still running in bootloader mode. */ | |
1173 | } | |
1174 | ||
1175 | mutex_unlock(&cyapa->state_sync_lock); | |
1176 | return error; | |
1177 | } | |
1178 | ||
1179 | static char *cyapa_state_to_string(struct cyapa *cyapa) | |
1180 | { | |
1181 | switch (cyapa->state) { | |
1182 | case CYAPA_STATE_BL_BUSY: | |
1183 | return "bootloader busy"; | |
1184 | case CYAPA_STATE_BL_IDLE: | |
1185 | return "bootloader idle"; | |
1186 | case CYAPA_STATE_BL_ACTIVE: | |
1187 | return "bootloader active"; | |
1188 | case CYAPA_STATE_GEN5_BL: | |
c2c06c41 | 1189 | case CYAPA_STATE_GEN6_BL: |
c806b0b8 DD |
1190 | return "bootloader"; |
1191 | case CYAPA_STATE_OP: | |
1192 | case CYAPA_STATE_GEN5_APP: | |
c2c06c41 | 1193 | case CYAPA_STATE_GEN6_APP: |
c806b0b8 DD |
1194 | return "operational"; /* Normal valid state. */ |
1195 | default: | |
1196 | return "invalid mode"; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | static ssize_t cyapa_show_mode(struct device *dev, | |
1201 | struct device_attribute *attr, char *buf) | |
1202 | { | |
1203 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1204 | int size; | |
1205 | int error; | |
1206 | ||
1207 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); | |
1208 | if (error) | |
1209 | return error; | |
1210 | ||
1211 | size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n", | |
1212 | cyapa->gen, cyapa_state_to_string(cyapa)); | |
1213 | ||
1214 | mutex_unlock(&cyapa->state_sync_lock); | |
1215 | return size; | |
1216 | } | |
1217 | ||
1218 | static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL); | |
1219 | static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL); | |
1220 | static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store); | |
1221 | static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL); | |
1222 | static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store); | |
1223 | static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL); | |
1224 | ||
1225 | static struct attribute *cyapa_sysfs_entries[] = { | |
1226 | &dev_attr_firmware_version.attr, | |
1227 | &dev_attr_product_id.attr, | |
1228 | &dev_attr_update_fw.attr, | |
1229 | &dev_attr_baseline.attr, | |
1230 | &dev_attr_calibrate.attr, | |
1231 | &dev_attr_mode.attr, | |
1232 | NULL, | |
1233 | }; | |
1234 | ||
1235 | static const struct attribute_group cyapa_sysfs_group = { | |
1236 | .attrs = cyapa_sysfs_entries, | |
1237 | }; | |
1238 | ||
1239 | static void cyapa_remove_sysfs_group(void *data) | |
1240 | { | |
1241 | struct cyapa *cyapa = data; | |
1242 | ||
1243 | sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group); | |
1244 | } | |
1245 | ||
36e9615b DD |
1246 | static void cyapa_disable_regulator(void *data) |
1247 | { | |
1248 | struct cyapa *cyapa = data; | |
1249 | ||
1250 | regulator_disable(cyapa->vcc); | |
1251 | } | |
1252 | ||
d7e34d12 BL |
1253 | static int cyapa_probe(struct i2c_client *client, |
1254 | const struct i2c_device_id *dev_id) | |
1255 | { | |
d7e34d12 | 1256 | struct device *dev = &client->dev; |
b1cfa7b4 DD |
1257 | struct cyapa *cyapa; |
1258 | u8 adapter_func; | |
9f1cd857 | 1259 | union i2c_smbus_data dummy; |
b1cfa7b4 | 1260 | int error; |
d7e34d12 | 1261 | |
6ddaf744 BL |
1262 | adapter_func = cyapa_check_adapter_functionality(client); |
1263 | if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) { | |
1264 | dev_err(dev, "not a supported I2C/SMBus adapter\n"); | |
1265 | return -EIO; | |
1266 | } | |
1267 | ||
9f1cd857 DD |
1268 | /* Make sure there is something at this address */ |
1269 | if (i2c_smbus_xfer(client->adapter, client->addr, 0, | |
1270 | I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) | |
1271 | return -ENODEV; | |
1272 | ||
b1cfa7b4 DD |
1273 | cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL); |
1274 | if (!cyapa) | |
d7e34d12 | 1275 | return -ENOMEM; |
d7e34d12 | 1276 | |
6ddaf744 BL |
1277 | /* i2c isn't supported, use smbus */ |
1278 | if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS) | |
1279 | cyapa->smbus = true; | |
b1cfa7b4 | 1280 | |
9f1cd857 DD |
1281 | cyapa->client = client; |
1282 | i2c_set_clientdata(client, cyapa); | |
1283 | sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr, | |
1284 | client->addr); | |
d7e34d12 | 1285 | |
36e9615b DD |
1286 | cyapa->vcc = devm_regulator_get(dev, "vcc"); |
1287 | if (IS_ERR(cyapa->vcc)) { | |
1288 | error = PTR_ERR(cyapa->vcc); | |
1289 | dev_err(dev, "failed to get vcc regulator: %d\n", error); | |
1290 | return error; | |
1291 | } | |
1292 | ||
1293 | error = regulator_enable(cyapa->vcc); | |
1294 | if (error) { | |
1295 | dev_err(dev, "failed to enable regulator: %d\n", error); | |
1296 | return error; | |
1297 | } | |
1298 | ||
1299 | error = devm_add_action(dev, cyapa_disable_regulator, cyapa); | |
1300 | if (error) { | |
1301 | cyapa_disable_regulator(cyapa); | |
1302 | dev_err(dev, "failed to add disable regulator action: %d\n", | |
1303 | error); | |
1304 | return error; | |
1305 | } | |
1306 | ||
9f1cd857 | 1307 | error = cyapa_initialize(cyapa); |
b1cfa7b4 | 1308 | if (error) { |
9f1cd857 | 1309 | dev_err(dev, "failed to detect and initialize tp device.\n"); |
b1cfa7b4 | 1310 | return error; |
d7e34d12 BL |
1311 | } |
1312 | ||
c806b0b8 DD |
1313 | error = sysfs_create_group(&client->dev.kobj, &cyapa_sysfs_group); |
1314 | if (error) { | |
1315 | dev_err(dev, "failed to create sysfs entries: %d\n", error); | |
1316 | return error; | |
1317 | } | |
1318 | ||
1319 | error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa); | |
1320 | if (error) { | |
1321 | cyapa_remove_sysfs_group(cyapa); | |
1322 | dev_err(dev, "failed to add sysfs cleanup action: %d\n", error); | |
1323 | return error; | |
1324 | } | |
1325 | ||
22e7db81 DD |
1326 | error = cyapa_prepare_wakeup_controls(cyapa); |
1327 | if (error) { | |
1328 | dev_err(dev, "failed to prepare wakeup controls: %d\n", error); | |
1329 | return error; | |
1330 | } | |
1331 | ||
67286508 DD |
1332 | error = cyapa_start_runtime(cyapa); |
1333 | if (error) { | |
1334 | dev_err(dev, "failed to start pm_runtime: %d\n", error); | |
1335 | return error; | |
1336 | } | |
1337 | ||
b1cfa7b4 DD |
1338 | error = devm_request_threaded_irq(dev, client->irq, |
1339 | NULL, cyapa_irq, | |
1340 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, | |
1341 | "cyapa", cyapa); | |
1342 | if (error) { | |
823a11fd | 1343 | dev_err(dev, "failed to request threaded irq: %d\n", error); |
b1cfa7b4 | 1344 | return error; |
d7e34d12 BL |
1345 | } |
1346 | ||
b1cfa7b4 DD |
1347 | /* Disable IRQ until the device is opened */ |
1348 | disable_irq(client->irq); | |
d7e34d12 | 1349 | |
9f1cd857 DD |
1350 | /* |
1351 | * Register the device in the input subsystem when it's operational. | |
1352 | * Otherwise, keep in this driver, so it can be be recovered or updated | |
1353 | * through the sysfs mode and update_fw interfaces by user or apps. | |
1354 | */ | |
1355 | if (cyapa->operational) { | |
1356 | error = cyapa_create_input_dev(cyapa); | |
1357 | if (error) { | |
1358 | dev_err(dev, "create input_dev instance failed: %d\n", | |
1359 | error); | |
1360 | return error; | |
1361 | } | |
b1cfa7b4 | 1362 | } |
d7e34d12 BL |
1363 | |
1364 | return 0; | |
1365 | } | |
1366 | ||
572081a4 | 1367 | static int __maybe_unused cyapa_suspend(struct device *dev) |
d7e34d12 | 1368 | { |
b1cfa7b4 DD |
1369 | struct i2c_client *client = to_i2c_client(dev); |
1370 | struct cyapa *cyapa = i2c_get_clientdata(client); | |
d7e34d12 | 1371 | u8 power_mode; |
b1cfa7b4 DD |
1372 | int error; |
1373 | ||
9f1cd857 | 1374 | error = mutex_lock_interruptible(&cyapa->state_sync_lock); |
b1cfa7b4 DD |
1375 | if (error) |
1376 | return error; | |
d7e34d12 | 1377 | |
67286508 DD |
1378 | /* |
1379 | * Runtime PM is enable only when device is in operational mode and | |
1380 | * users in use, so need check it before disable it to | |
1381 | * avoid unbalance warning. | |
1382 | */ | |
1383 | if (pm_runtime_enabled(dev)) | |
1384 | pm_runtime_disable(dev); | |
b1cfa7b4 | 1385 | disable_irq(client->irq); |
d7e34d12 BL |
1386 | |
1387 | /* | |
1388 | * Set trackpad device to idle mode if wakeup is allowed, | |
1389 | * otherwise turn off. | |
1390 | */ | |
9f1cd857 DD |
1391 | if (cyapa->operational) { |
1392 | power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode | |
1393 | : PWR_MODE_OFF; | |
1394 | error = cyapa->ops->set_power_mode(cyapa, power_mode, | |
757cae5a | 1395 | cyapa->suspend_sleep_time, true); |
9f1cd857 DD |
1396 | if (error) |
1397 | dev_err(dev, "suspend set power mode failed: %d\n", | |
1398 | error); | |
1399 | } | |
d7e34d12 | 1400 | |
945525ee DD |
1401 | /* |
1402 | * Disable proximity interrupt when system idle, want true touch to | |
1403 | * wake the system. | |
1404 | */ | |
1405 | if (cyapa->dev_pwr_mode != PWR_MODE_OFF) | |
1406 | cyapa->ops->set_proximity(cyapa, false); | |
1407 | ||
d7e34d12 | 1408 | if (device_may_wakeup(dev)) |
f68a95cd | 1409 | cyapa->irq_wake = (enable_irq_wake(client->irq) == 0); |
b1cfa7b4 | 1410 | |
9f1cd857 | 1411 | mutex_unlock(&cyapa->state_sync_lock); |
d7e34d12 BL |
1412 | return 0; |
1413 | } | |
1414 | ||
572081a4 | 1415 | static int __maybe_unused cyapa_resume(struct device *dev) |
d7e34d12 | 1416 | { |
b1cfa7b4 DD |
1417 | struct i2c_client *client = to_i2c_client(dev); |
1418 | struct cyapa *cyapa = i2c_get_clientdata(client); | |
b1cfa7b4 DD |
1419 | int error; |
1420 | ||
9f1cd857 | 1421 | mutex_lock(&cyapa->state_sync_lock); |
d7e34d12 | 1422 | |
9f1cd857 | 1423 | if (device_may_wakeup(dev) && cyapa->irq_wake) { |
f68a95cd | 1424 | disable_irq_wake(client->irq); |
9f1cd857 DD |
1425 | cyapa->irq_wake = false; |
1426 | } | |
d7e34d12 | 1427 | |
945525ee DD |
1428 | /* |
1429 | * Update device states and runtime PM states. | |
1430 | * Re-Enable proximity interrupt after enter operational mode. | |
1431 | */ | |
9f1cd857 | 1432 | error = cyapa_reinitialize(cyapa); |
b1cfa7b4 | 1433 | if (error) |
9f1cd857 | 1434 | dev_warn(dev, "failed to reinitialize TP device: %d\n", error); |
d7e34d12 | 1435 | |
f68a95cd | 1436 | enable_irq(client->irq); |
b1cfa7b4 | 1437 | |
9f1cd857 | 1438 | mutex_unlock(&cyapa->state_sync_lock); |
d7e34d12 BL |
1439 | return 0; |
1440 | } | |
d7e34d12 | 1441 | |
67286508 DD |
1442 | static int __maybe_unused cyapa_runtime_suspend(struct device *dev) |
1443 | { | |
1444 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1445 | int error; | |
1446 | ||
1447 | error = cyapa->ops->set_power_mode(cyapa, | |
1448 | cyapa->runtime_suspend_power_mode, | |
757cae5a DD |
1449 | cyapa->runtime_suspend_sleep_time, |
1450 | false); | |
67286508 DD |
1451 | if (error) |
1452 | dev_warn(dev, "runtime suspend failed: %d\n", error); | |
1453 | ||
1454 | return 0; | |
1455 | } | |
1456 | ||
1457 | static int __maybe_unused cyapa_runtime_resume(struct device *dev) | |
1458 | { | |
1459 | struct cyapa *cyapa = dev_get_drvdata(dev); | |
1460 | int error; | |
1461 | ||
757cae5a DD |
1462 | error = cyapa->ops->set_power_mode(cyapa, |
1463 | PWR_MODE_FULL_ACTIVE, 0, false); | |
67286508 DD |
1464 | if (error) |
1465 | dev_warn(dev, "runtime resume failed: %d\n", error); | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | static const struct dev_pm_ops cyapa_pm_ops = { | |
1471 | SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume) | |
1472 | SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL) | |
1473 | }; | |
d7e34d12 BL |
1474 | |
1475 | static const struct i2c_device_id cyapa_id_table[] = { | |
1476 | { "cyapa", 0 }, | |
1477 | { }, | |
1478 | }; | |
1479 | MODULE_DEVICE_TABLE(i2c, cyapa_id_table); | |
1480 | ||
7b2171d7 DD |
1481 | #ifdef CONFIG_ACPI |
1482 | static const struct acpi_device_id cyapa_acpi_id[] = { | |
1483 | { "CYAP0000", 0 }, /* Gen3 trackpad with 0x67 I2C address. */ | |
1484 | { "CYAP0001", 0 }, /* Gen5 trackpad with 0x24 I2C address. */ | |
ce2ae9e3 | 1485 | { "CYAP0002", 0 }, /* Gen6 trackpad with 0x24 I2C address. */ |
7b2171d7 DD |
1486 | { } |
1487 | }; | |
1488 | MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id); | |
1489 | #endif | |
1490 | ||
ddbb299d DD |
1491 | #ifdef CONFIG_OF |
1492 | static const struct of_device_id cyapa_of_match[] = { | |
1493 | { .compatible = "cypress,cyapa" }, | |
1494 | { /* sentinel */ } | |
1495 | }; | |
1496 | MODULE_DEVICE_TABLE(of, cyapa_of_match); | |
1497 | #endif | |
1498 | ||
d7e34d12 BL |
1499 | static struct i2c_driver cyapa_driver = { |
1500 | .driver = { | |
1501 | .name = "cyapa", | |
d7e34d12 | 1502 | .pm = &cyapa_pm_ops, |
7b2171d7 | 1503 | .acpi_match_table = ACPI_PTR(cyapa_acpi_id), |
ddbb299d | 1504 | .of_match_table = of_match_ptr(cyapa_of_match), |
d7e34d12 BL |
1505 | }, |
1506 | ||
1507 | .probe = cyapa_probe, | |
d7e34d12 BL |
1508 | .id_table = cyapa_id_table, |
1509 | }; | |
1510 | ||
1511 | module_i2c_driver(cyapa_driver); | |
1512 | ||
1513 | MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver"); | |
1514 | MODULE_AUTHOR("Dudley Du <dudl@cypress.com>"); | |
1515 | MODULE_LICENSE("GPL"); |