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5245db49 HS |
1 | /* |
2 | * Driver for AUO in-cell touchscreens | |
3 | * | |
4 | * Copyright (c) 2011 Heiko Stuebner <heiko@sntech.de> | |
5 | * | |
6 | * loosely based on auo_touch.c from Dell Streak vendor-kernel | |
7 | * | |
8 | * Copyright (c) 2008 QUALCOMM Incorporated. | |
9 | * Copyright (c) 2008 QUALCOMM USA, INC. | |
10 | * | |
11 | * | |
12 | * This software is licensed under the terms of the GNU General Public | |
13 | * License version 2, as published by the Free Software Foundation, and | |
14 | * may be copied, distributed, and modified under those terms. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/input.h> | |
28 | #include <linux/jiffies.h> | |
29 | #include <linux/i2c.h> | |
30 | #include <linux/mutex.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/gpio.h> | |
33 | #include <linux/input/auo-pixcir-ts.h> | |
7241443f HS |
34 | #include <linux/of.h> |
35 | #include <linux/of_gpio.h> | |
5245db49 HS |
36 | |
37 | /* | |
38 | * Coordinate calculation: | |
39 | * X1 = X1_LSB + X1_MSB*256 | |
40 | * Y1 = Y1_LSB + Y1_MSB*256 | |
41 | * X2 = X2_LSB + X2_MSB*256 | |
42 | * Y2 = Y2_LSB + Y2_MSB*256 | |
43 | */ | |
44 | #define AUO_PIXCIR_REG_X1_LSB 0x00 | |
45 | #define AUO_PIXCIR_REG_X1_MSB 0x01 | |
46 | #define AUO_PIXCIR_REG_Y1_LSB 0x02 | |
47 | #define AUO_PIXCIR_REG_Y1_MSB 0x03 | |
48 | #define AUO_PIXCIR_REG_X2_LSB 0x04 | |
49 | #define AUO_PIXCIR_REG_X2_MSB 0x05 | |
50 | #define AUO_PIXCIR_REG_Y2_LSB 0x06 | |
51 | #define AUO_PIXCIR_REG_Y2_MSB 0x07 | |
52 | ||
53 | #define AUO_PIXCIR_REG_STRENGTH 0x0d | |
54 | #define AUO_PIXCIR_REG_STRENGTH_X1_LSB 0x0e | |
55 | #define AUO_PIXCIR_REG_STRENGTH_X1_MSB 0x0f | |
56 | ||
57 | #define AUO_PIXCIR_REG_RAW_DATA_X 0x2b | |
58 | #define AUO_PIXCIR_REG_RAW_DATA_Y 0x4f | |
59 | ||
60 | #define AUO_PIXCIR_REG_X_SENSITIVITY 0x6f | |
61 | #define AUO_PIXCIR_REG_Y_SENSITIVITY 0x70 | |
62 | #define AUO_PIXCIR_REG_INT_SETTING 0x71 | |
63 | #define AUO_PIXCIR_REG_INT_WIDTH 0x72 | |
64 | #define AUO_PIXCIR_REG_POWER_MODE 0x73 | |
65 | ||
66 | #define AUO_PIXCIR_REG_VERSION 0x77 | |
67 | #define AUO_PIXCIR_REG_CALIBRATE 0x78 | |
68 | ||
69 | #define AUO_PIXCIR_REG_TOUCHAREA_X1 0x1e | |
70 | #define AUO_PIXCIR_REG_TOUCHAREA_Y1 0x1f | |
71 | #define AUO_PIXCIR_REG_TOUCHAREA_X2 0x20 | |
72 | #define AUO_PIXCIR_REG_TOUCHAREA_Y2 0x21 | |
73 | ||
74 | #define AUO_PIXCIR_REG_EEPROM_CALIB_X 0x42 | |
75 | #define AUO_PIXCIR_REG_EEPROM_CALIB_Y 0xad | |
76 | ||
77 | #define AUO_PIXCIR_INT_TPNUM_MASK 0xe0 | |
78 | #define AUO_PIXCIR_INT_TPNUM_SHIFT 5 | |
79 | #define AUO_PIXCIR_INT_RELEASE (1 << 4) | |
80 | #define AUO_PIXCIR_INT_ENABLE (1 << 3) | |
81 | #define AUO_PIXCIR_INT_POL_HIGH (1 << 2) | |
82 | #define AUO_PIXCIR_INT_MODE_MASK 0x03 | |
83 | ||
84 | /* | |
85 | * Power modes: | |
86 | * active: scan speed 60Hz | |
87 | * sleep: scan speed 10Hz can be auto-activated, wakeup on 1st touch | |
88 | * deep sleep: scan speed 1Hz can only be entered or left manually. | |
89 | */ | |
90 | #define AUO_PIXCIR_POWER_ACTIVE 0x00 | |
91 | #define AUO_PIXCIR_POWER_SLEEP 0x01 | |
92 | #define AUO_PIXCIR_POWER_DEEP_SLEEP 0x02 | |
93 | #define AUO_PIXCIR_POWER_MASK 0x03 | |
94 | ||
95 | #define AUO_PIXCIR_POWER_ALLOW_SLEEP (1 << 2) | |
96 | #define AUO_PIXCIR_POWER_IDLE_TIME(ms) ((ms & 0xf) << 4) | |
97 | ||
98 | #define AUO_PIXCIR_CALIBRATE 0x03 | |
99 | ||
100 | #define AUO_PIXCIR_EEPROM_CALIB_X_LEN 62 | |
101 | #define AUO_PIXCIR_EEPROM_CALIB_Y_LEN 36 | |
102 | ||
103 | #define AUO_PIXCIR_RAW_DATA_X_LEN 18 | |
104 | #define AUO_PIXCIR_RAW_DATA_Y_LEN 11 | |
105 | ||
106 | #define AUO_PIXCIR_STRENGTH_ENABLE (1 << 0) | |
107 | ||
108 | /* Touchscreen absolute values */ | |
109 | #define AUO_PIXCIR_REPORT_POINTS 2 | |
110 | #define AUO_PIXCIR_MAX_AREA 0xff | |
111 | #define AUO_PIXCIR_PENUP_TIMEOUT_MS 10 | |
112 | ||
113 | struct auo_pixcir_ts { | |
114 | struct i2c_client *client; | |
115 | struct input_dev *input; | |
38e83f7f | 116 | const struct auo_pixcir_ts_platdata *pdata; |
5245db49 HS |
117 | char phys[32]; |
118 | ||
119 | /* special handling for touch_indicate interupt mode */ | |
120 | bool touch_ind_mode; | |
121 | ||
122 | wait_queue_head_t wait; | |
123 | bool stopped; | |
124 | }; | |
125 | ||
126 | struct auo_point_t { | |
127 | int coord_x; | |
128 | int coord_y; | |
129 | int area_major; | |
130 | int area_minor; | |
131 | int orientation; | |
132 | }; | |
133 | ||
134 | static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts, | |
135 | struct auo_point_t *point) | |
136 | { | |
137 | struct i2c_client *client = ts->client; | |
38e83f7f | 138 | const struct auo_pixcir_ts_platdata *pdata = ts->pdata; |
5245db49 HS |
139 | uint8_t raw_coord[8]; |
140 | uint8_t raw_area[4]; | |
141 | int i, ret; | |
142 | ||
143 | /* touch coordinates */ | |
144 | ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_X1_LSB, | |
145 | 8, raw_coord); | |
146 | if (ret < 0) { | |
147 | dev_err(&client->dev, "failed to read coordinate, %d\n", ret); | |
148 | return ret; | |
149 | } | |
150 | ||
151 | /* touch area */ | |
152 | ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_TOUCHAREA_X1, | |
153 | 4, raw_area); | |
154 | if (ret < 0) { | |
155 | dev_err(&client->dev, "could not read touch area, %d\n", ret); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) { | |
160 | point[i].coord_x = | |
161 | raw_coord[4 * i + 1] << 8 | raw_coord[4 * i]; | |
162 | point[i].coord_y = | |
163 | raw_coord[4 * i + 3] << 8 | raw_coord[4 * i + 2]; | |
164 | ||
165 | if (point[i].coord_x > pdata->x_max || | |
166 | point[i].coord_y > pdata->y_max) { | |
167 | dev_warn(&client->dev, "coordinates (%d,%d) invalid\n", | |
168 | point[i].coord_x, point[i].coord_y); | |
169 | point[i].coord_x = point[i].coord_y = 0; | |
170 | } | |
171 | ||
172 | /* determine touch major, minor and orientation */ | |
173 | point[i].area_major = max(raw_area[2 * i], raw_area[2 * i + 1]); | |
174 | point[i].area_minor = min(raw_area[2 * i], raw_area[2 * i + 1]); | |
175 | point[i].orientation = raw_area[2 * i] > raw_area[2 * i + 1]; | |
176 | } | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id) | |
182 | { | |
183 | struct auo_pixcir_ts *ts = dev_id; | |
38e83f7f | 184 | const struct auo_pixcir_ts_platdata *pdata = ts->pdata; |
5245db49 HS |
185 | struct auo_point_t point[AUO_PIXCIR_REPORT_POINTS]; |
186 | int i; | |
187 | int ret; | |
188 | int fingers = 0; | |
189 | int abs = -1; | |
190 | ||
191 | while (!ts->stopped) { | |
192 | ||
193 | /* check for up event in touch touch_ind_mode */ | |
194 | if (ts->touch_ind_mode) { | |
195 | if (gpio_get_value(pdata->gpio_int) == 0) { | |
196 | input_mt_sync(ts->input); | |
197 | input_report_key(ts->input, BTN_TOUCH, 0); | |
198 | input_sync(ts->input); | |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
203 | ret = auo_pixcir_collect_data(ts, point); | |
204 | if (ret < 0) { | |
205 | /* we want to loop only in touch_ind_mode */ | |
206 | if (!ts->touch_ind_mode) | |
207 | break; | |
208 | ||
209 | wait_event_timeout(ts->wait, ts->stopped, | |
210 | msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS)); | |
211 | continue; | |
212 | } | |
213 | ||
214 | for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) { | |
215 | if (point[i].coord_x > 0 || point[i].coord_y > 0) { | |
216 | input_report_abs(ts->input, ABS_MT_POSITION_X, | |
217 | point[i].coord_x); | |
218 | input_report_abs(ts->input, ABS_MT_POSITION_Y, | |
219 | point[i].coord_y); | |
220 | input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, | |
221 | point[i].area_major); | |
222 | input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, | |
223 | point[i].area_minor); | |
224 | input_report_abs(ts->input, ABS_MT_ORIENTATION, | |
225 | point[i].orientation); | |
226 | input_mt_sync(ts->input); | |
227 | ||
228 | /* use first finger as source for singletouch */ | |
229 | if (fingers == 0) | |
230 | abs = i; | |
231 | ||
232 | /* number of touch points could also be queried | |
233 | * via i2c but would require an additional call | |
234 | */ | |
235 | fingers++; | |
236 | } | |
237 | } | |
238 | ||
239 | input_report_key(ts->input, BTN_TOUCH, fingers > 0); | |
240 | ||
241 | if (abs > -1) { | |
242 | input_report_abs(ts->input, ABS_X, point[abs].coord_x); | |
243 | input_report_abs(ts->input, ABS_Y, point[abs].coord_y); | |
244 | } | |
245 | ||
246 | input_sync(ts->input); | |
247 | ||
248 | /* we want to loop only in touch_ind_mode */ | |
249 | if (!ts->touch_ind_mode) | |
250 | break; | |
251 | ||
252 | wait_event_timeout(ts->wait, ts->stopped, | |
253 | msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS)); | |
254 | } | |
255 | ||
256 | return IRQ_HANDLED; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Set the power mode of the device. | |
261 | * Valid modes are | |
262 | * - AUO_PIXCIR_POWER_ACTIVE | |
263 | * - AUO_PIXCIR_POWER_SLEEP - automatically left on first touch | |
264 | * - AUO_PIXCIR_POWER_DEEP_SLEEP | |
265 | */ | |
266 | static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode) | |
267 | { | |
268 | struct i2c_client *client = ts->client; | |
269 | int ret; | |
270 | ||
271 | ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE); | |
272 | if (ret < 0) { | |
273 | dev_err(&client->dev, "unable to read reg %Xh, %d\n", | |
274 | AUO_PIXCIR_REG_POWER_MODE, ret); | |
275 | return ret; | |
276 | } | |
277 | ||
278 | ret &= ~AUO_PIXCIR_POWER_MASK; | |
279 | ret |= mode; | |
280 | ||
281 | ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_POWER_MODE, ret); | |
282 | if (ret) { | |
283 | dev_err(&client->dev, "unable to write reg %Xh, %d\n", | |
284 | AUO_PIXCIR_REG_POWER_MODE, ret); | |
285 | return ret; | |
286 | } | |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
5298cc4c | 291 | static int auo_pixcir_int_config(struct auo_pixcir_ts *ts, |
5245db49 HS |
292 | int int_setting) |
293 | { | |
294 | struct i2c_client *client = ts->client; | |
38e83f7f | 295 | const struct auo_pixcir_ts_platdata *pdata = ts->pdata; |
5245db49 HS |
296 | int ret; |
297 | ||
298 | ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING); | |
299 | if (ret < 0) { | |
300 | dev_err(&client->dev, "unable to read reg %Xh, %d\n", | |
301 | AUO_PIXCIR_REG_INT_SETTING, ret); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | ret &= ~AUO_PIXCIR_INT_MODE_MASK; | |
306 | ret |= int_setting; | |
307 | ret |= AUO_PIXCIR_INT_POL_HIGH; /* always use high for interrupts */ | |
308 | ||
309 | ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING, | |
310 | ret); | |
311 | if (ret < 0) { | |
312 | dev_err(&client->dev, "unable to write reg %Xh, %d\n", | |
313 | AUO_PIXCIR_REG_INT_SETTING, ret); | |
314 | return ret; | |
315 | } | |
316 | ||
317 | ts->touch_ind_mode = pdata->int_setting == AUO_PIXCIR_INT_TOUCH_IND; | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | /* control the generation of interrupts on the device side */ | |
323 | static int auo_pixcir_int_toggle(struct auo_pixcir_ts *ts, bool enable) | |
324 | { | |
325 | struct i2c_client *client = ts->client; | |
326 | int ret; | |
327 | ||
328 | ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING); | |
329 | if (ret < 0) { | |
330 | dev_err(&client->dev, "unable to read reg %Xh, %d\n", | |
331 | AUO_PIXCIR_REG_INT_SETTING, ret); | |
332 | return ret; | |
333 | } | |
334 | ||
335 | if (enable) | |
336 | ret |= AUO_PIXCIR_INT_ENABLE; | |
337 | else | |
338 | ret &= ~AUO_PIXCIR_INT_ENABLE; | |
339 | ||
340 | ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING, | |
341 | ret); | |
342 | if (ret < 0) { | |
343 | dev_err(&client->dev, "unable to write reg %Xh, %d\n", | |
344 | AUO_PIXCIR_REG_INT_SETTING, ret); | |
345 | return ret; | |
346 | } | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | static int auo_pixcir_start(struct auo_pixcir_ts *ts) | |
352 | { | |
353 | struct i2c_client *client = ts->client; | |
354 | int ret; | |
355 | ||
356 | ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_ACTIVE); | |
357 | if (ret < 0) { | |
358 | dev_err(&client->dev, "could not set power mode, %d\n", | |
359 | ret); | |
360 | return ret; | |
361 | } | |
362 | ||
363 | ts->stopped = false; | |
364 | mb(); | |
365 | enable_irq(client->irq); | |
366 | ||
367 | ret = auo_pixcir_int_toggle(ts, 1); | |
368 | if (ret < 0) { | |
369 | dev_err(&client->dev, "could not enable interrupt, %d\n", | |
370 | ret); | |
371 | disable_irq(client->irq); | |
372 | return ret; | |
373 | } | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | static int auo_pixcir_stop(struct auo_pixcir_ts *ts) | |
379 | { | |
380 | struct i2c_client *client = ts->client; | |
381 | int ret; | |
382 | ||
383 | ret = auo_pixcir_int_toggle(ts, 0); | |
384 | if (ret < 0) { | |
385 | dev_err(&client->dev, "could not disable interrupt, %d\n", | |
386 | ret); | |
387 | return ret; | |
388 | } | |
389 | ||
390 | /* disable receiving of interrupts */ | |
391 | disable_irq(client->irq); | |
392 | ts->stopped = true; | |
393 | mb(); | |
394 | wake_up(&ts->wait); | |
395 | ||
396 | return auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_DEEP_SLEEP); | |
397 | } | |
398 | ||
399 | static int auo_pixcir_input_open(struct input_dev *dev) | |
400 | { | |
401 | struct auo_pixcir_ts *ts = input_get_drvdata(dev); | |
5245db49 | 402 | |
901ea5e3 | 403 | return auo_pixcir_start(ts); |
5245db49 HS |
404 | } |
405 | ||
406 | static void auo_pixcir_input_close(struct input_dev *dev) | |
407 | { | |
408 | struct auo_pixcir_ts *ts = input_get_drvdata(dev); | |
409 | ||
410 | auo_pixcir_stop(ts); | |
411 | ||
412 | return; | |
413 | } | |
414 | ||
02b6a58b | 415 | static int __maybe_unused auo_pixcir_suspend(struct device *dev) |
5245db49 HS |
416 | { |
417 | struct i2c_client *client = to_i2c_client(dev); | |
418 | struct auo_pixcir_ts *ts = i2c_get_clientdata(client); | |
419 | struct input_dev *input = ts->input; | |
420 | int ret = 0; | |
421 | ||
422 | mutex_lock(&input->mutex); | |
423 | ||
424 | /* when configured as wakeup source, device should always wake system | |
425 | * therefore start device if necessary | |
426 | */ | |
427 | if (device_may_wakeup(&client->dev)) { | |
428 | /* need to start device if not open, to be wakeup source */ | |
429 | if (!input->users) { | |
430 | ret = auo_pixcir_start(ts); | |
431 | if (ret) | |
432 | goto unlock; | |
433 | } | |
434 | ||
435 | enable_irq_wake(client->irq); | |
436 | ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_SLEEP); | |
437 | } else if (input->users) { | |
438 | ret = auo_pixcir_stop(ts); | |
439 | } | |
440 | ||
441 | unlock: | |
442 | mutex_unlock(&input->mutex); | |
443 | ||
444 | return ret; | |
445 | } | |
446 | ||
02b6a58b | 447 | static int __maybe_unused auo_pixcir_resume(struct device *dev) |
5245db49 HS |
448 | { |
449 | struct i2c_client *client = to_i2c_client(dev); | |
450 | struct auo_pixcir_ts *ts = i2c_get_clientdata(client); | |
451 | struct input_dev *input = ts->input; | |
452 | int ret = 0; | |
453 | ||
454 | mutex_lock(&input->mutex); | |
455 | ||
456 | if (device_may_wakeup(&client->dev)) { | |
457 | disable_irq_wake(client->irq); | |
458 | ||
459 | /* need to stop device if it was not open on suspend */ | |
460 | if (!input->users) { | |
461 | ret = auo_pixcir_stop(ts); | |
462 | if (ret) | |
463 | goto unlock; | |
464 | } | |
465 | ||
466 | /* device wakes automatically from SLEEP */ | |
467 | } else if (input->users) { | |
468 | ret = auo_pixcir_start(ts); | |
469 | } | |
470 | ||
471 | unlock: | |
472 | mutex_unlock(&input->mutex); | |
473 | ||
474 | return ret; | |
475 | } | |
5245db49 | 476 | |
7241443f HS |
477 | static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops, |
478 | auo_pixcir_suspend, auo_pixcir_resume); | |
479 | ||
480 | #ifdef CONFIG_OF | |
481 | static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) | |
482 | { | |
483 | struct auo_pixcir_ts_platdata *pdata; | |
484 | struct device_node *np = dev->of_node; | |
485 | ||
486 | if (!np) | |
487 | return ERR_PTR(-ENOENT); | |
488 | ||
489 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
490 | if (!pdata) { | |
491 | dev_err(dev, "failed to allocate platform data\n"); | |
492 | return ERR_PTR(-ENOMEM); | |
493 | } | |
494 | ||
495 | pdata->gpio_int = of_get_gpio(np, 0); | |
496 | if (!gpio_is_valid(pdata->gpio_int)) { | |
497 | dev_err(dev, "failed to get interrupt gpio\n"); | |
498 | return ERR_PTR(-EINVAL); | |
499 | } | |
500 | ||
501 | pdata->gpio_rst = of_get_gpio(np, 1); | |
502 | if (!gpio_is_valid(pdata->gpio_rst)) { | |
503 | dev_err(dev, "failed to get reset gpio\n"); | |
504 | return ERR_PTR(-EINVAL); | |
505 | } | |
506 | ||
507 | if (of_property_read_u32(np, "x-size", &pdata->x_max)) { | |
508 | dev_err(dev, "failed to get x-size property\n"); | |
509 | return ERR_PTR(-EINVAL); | |
510 | } | |
511 | ||
512 | if (of_property_read_u32(np, "y-size", &pdata->y_max)) { | |
513 | dev_err(dev, "failed to get y-size property\n"); | |
514 | return ERR_PTR(-EINVAL); | |
515 | } | |
516 | ||
517 | /* default to asserting the interrupt when the screen is touched */ | |
518 | pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND; | |
519 | ||
520 | return pdata; | |
521 | } | |
522 | #else | |
523 | static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) | |
524 | { | |
525 | return ERR_PTR(-EINVAL); | |
526 | } | |
527 | #endif | |
5245db49 | 528 | |
bfc29e95 DT |
529 | static void auo_pixcir_reset(void *data) |
530 | { | |
531 | struct auo_pixcir_ts *ts = data; | |
532 | ||
533 | gpio_set_value(ts->pdata->gpio_rst, 0); | |
534 | } | |
535 | ||
5298cc4c | 536 | static int auo_pixcir_probe(struct i2c_client *client, |
bfc29e95 | 537 | const struct i2c_device_id *id) |
5245db49 | 538 | { |
7241443f | 539 | const struct auo_pixcir_ts_platdata *pdata; |
5245db49 HS |
540 | struct auo_pixcir_ts *ts; |
541 | struct input_dev *input_dev; | |
bfc29e95 DT |
542 | int version; |
543 | int error; | |
5245db49 | 544 | |
7241443f HS |
545 | pdata = dev_get_platdata(&client->dev); |
546 | if (!pdata) { | |
547 | pdata = auo_pixcir_parse_dt(&client->dev); | |
548 | if (IS_ERR(pdata)) | |
549 | return PTR_ERR(pdata); | |
550 | } | |
5245db49 | 551 | |
bfc29e95 DT |
552 | ts = devm_kzalloc(&client->dev, |
553 | sizeof(struct auo_pixcir_ts), GFP_KERNEL); | |
5245db49 HS |
554 | if (!ts) |
555 | return -ENOMEM; | |
556 | ||
bfc29e95 DT |
557 | input_dev = devm_input_allocate_device(&client->dev); |
558 | if (!input_dev) { | |
559 | dev_err(&client->dev, "could not allocate input device\n"); | |
560 | return -ENOMEM; | |
27cef8b4 HS |
561 | } |
562 | ||
38e83f7f | 563 | ts->pdata = pdata; |
5245db49 | 564 | ts->client = client; |
bfc29e95 | 565 | ts->input = input_dev; |
5245db49 | 566 | ts->touch_ind_mode = 0; |
bfc29e95 | 567 | ts->stopped = true; |
5245db49 HS |
568 | init_waitqueue_head(&ts->wait); |
569 | ||
570 | snprintf(ts->phys, sizeof(ts->phys), | |
571 | "%s/input0", dev_name(&client->dev)); | |
572 | ||
5245db49 HS |
573 | input_dev->name = "AUO-Pixcir touchscreen"; |
574 | input_dev->phys = ts->phys; | |
575 | input_dev->id.bustype = BUS_I2C; | |
5245db49 HS |
576 | |
577 | input_dev->open = auo_pixcir_input_open; | |
578 | input_dev->close = auo_pixcir_input_close; | |
579 | ||
580 | __set_bit(EV_ABS, input_dev->evbit); | |
581 | __set_bit(EV_KEY, input_dev->evbit); | |
582 | ||
583 | __set_bit(BTN_TOUCH, input_dev->keybit); | |
584 | ||
585 | /* For single touch */ | |
586 | input_set_abs_params(input_dev, ABS_X, 0, pdata->x_max, 0, 0); | |
587 | input_set_abs_params(input_dev, ABS_Y, 0, pdata->y_max, 0, 0); | |
588 | ||
589 | /* For multi touch */ | |
590 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, | |
591 | pdata->x_max, 0, 0); | |
592 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, | |
593 | pdata->y_max, 0, 0); | |
594 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, | |
595 | AUO_PIXCIR_MAX_AREA, 0, 0); | |
596 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, | |
597 | AUO_PIXCIR_MAX_AREA, 0, 0); | |
598 | input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); | |
599 | ||
5245db49 | 600 | input_set_drvdata(ts->input, ts); |
5245db49 | 601 | |
bfc29e95 DT |
602 | error = devm_gpio_request_one(&client->dev, pdata->gpio_int, |
603 | GPIOF_DIR_IN, "auo_pixcir_ts_int"); | |
604 | if (error) { | |
605 | dev_err(&client->dev, "request of gpio %d failed, %d\n", | |
606 | pdata->gpio_int, error); | |
607 | return error; | |
5245db49 HS |
608 | } |
609 | ||
bfc29e95 DT |
610 | error = devm_gpio_request_one(&client->dev, pdata->gpio_rst, |
611 | GPIOF_DIR_OUT | GPIOF_INIT_HIGH, | |
612 | "auo_pixcir_ts_rst"); | |
613 | if (error) { | |
614 | dev_err(&client->dev, "request of gpio %d failed, %d\n", | |
615 | pdata->gpio_rst, error); | |
616 | return error; | |
5245db49 HS |
617 | } |
618 | ||
bfc29e95 DT |
619 | error = devm_add_action(&client->dev, auo_pixcir_reset, ts); |
620 | if (error) { | |
621 | auo_pixcir_reset(ts); | |
622 | dev_err(&client->dev, "failed to register reset action, %d\n", | |
623 | error); | |
624 | return error; | |
625 | } | |
5245db49 | 626 | |
bfc29e95 | 627 | msleep(200); |
5245db49 | 628 | |
bfc29e95 DT |
629 | version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION); |
630 | if (version < 0) { | |
631 | error = version; | |
632 | return error; | |
633 | } | |
5245db49 | 634 | |
bfc29e95 | 635 | dev_info(&client->dev, "firmware version 0x%X\n", version); |
5245db49 | 636 | |
bfc29e95 DT |
637 | error = auo_pixcir_int_config(ts, pdata->int_setting); |
638 | if (error) | |
639 | return error; | |
5245db49 | 640 | |
bfc29e95 DT |
641 | error = devm_request_threaded_irq(&client->dev, client->irq, |
642 | NULL, auo_pixcir_interrupt, | |
643 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
644 | input_dev->name, ts); | |
645 | if (error) { | |
646 | dev_err(&client->dev, "irq %d requested failed, %d\n", | |
647 | client->irq, error); | |
648 | return error; | |
649 | } | |
5245db49 | 650 | |
bfc29e95 DT |
651 | /* stop device and put it into deep sleep until it is opened */ |
652 | error = auo_pixcir_stop(ts); | |
653 | if (error) | |
654 | return error; | |
655 | ||
656 | error = input_register_device(input_dev); | |
657 | if (error) { | |
658 | dev_err(&client->dev, "could not register input device, %d\n", | |
659 | error); | |
660 | return error; | |
661 | } | |
5245db49 | 662 | |
bfc29e95 | 663 | i2c_set_clientdata(client, ts); |
5245db49 HS |
664 | |
665 | return 0; | |
666 | } | |
667 | ||
668 | static const struct i2c_device_id auo_pixcir_idtable[] = { | |
669 | { "auo_pixcir_ts", 0 }, | |
670 | { } | |
671 | }; | |
672 | MODULE_DEVICE_TABLE(i2c, auo_pixcir_idtable); | |
673 | ||
7241443f | 674 | #ifdef CONFIG_OF |
69f8cafd | 675 | static const struct of_device_id auo_pixcir_ts_dt_idtable[] = { |
7241443f HS |
676 | { .compatible = "auo,auo_pixcir_ts" }, |
677 | {}, | |
678 | }; | |
679 | MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable); | |
680 | #endif | |
681 | ||
5245db49 HS |
682 | static struct i2c_driver auo_pixcir_driver = { |
683 | .driver = { | |
5245db49 HS |
684 | .name = "auo_pixcir_ts", |
685 | .pm = &auo_pixcir_pm_ops, | |
7241443f | 686 | .of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable), |
5245db49 HS |
687 | }, |
688 | .probe = auo_pixcir_probe, | |
5245db49 HS |
689 | .id_table = auo_pixcir_idtable, |
690 | }; | |
691 | ||
4a533835 | 692 | module_i2c_driver(auo_pixcir_driver); |
5245db49 HS |
693 | |
694 | MODULE_DESCRIPTION("AUO-PIXCIR touchscreen driver"); | |
695 | MODULE_LICENSE("GPL v2"); | |
696 | MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); |