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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); | |
402 | int ret; | |
403 | ||
404 | ret = auo_pixcir_start(ts); | |
405 | if (ret) | |
406 | return ret; | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | static void auo_pixcir_input_close(struct input_dev *dev) | |
412 | { | |
413 | struct auo_pixcir_ts *ts = input_get_drvdata(dev); | |
414 | ||
415 | auo_pixcir_stop(ts); | |
416 | ||
417 | return; | |
418 | } | |
419 | ||
420 | #ifdef CONFIG_PM_SLEEP | |
421 | static int auo_pixcir_suspend(struct device *dev) | |
422 | { | |
423 | struct i2c_client *client = to_i2c_client(dev); | |
424 | struct auo_pixcir_ts *ts = i2c_get_clientdata(client); | |
425 | struct input_dev *input = ts->input; | |
426 | int ret = 0; | |
427 | ||
428 | mutex_lock(&input->mutex); | |
429 | ||
430 | /* when configured as wakeup source, device should always wake system | |
431 | * therefore start device if necessary | |
432 | */ | |
433 | if (device_may_wakeup(&client->dev)) { | |
434 | /* need to start device if not open, to be wakeup source */ | |
435 | if (!input->users) { | |
436 | ret = auo_pixcir_start(ts); | |
437 | if (ret) | |
438 | goto unlock; | |
439 | } | |
440 | ||
441 | enable_irq_wake(client->irq); | |
442 | ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_SLEEP); | |
443 | } else if (input->users) { | |
444 | ret = auo_pixcir_stop(ts); | |
445 | } | |
446 | ||
447 | unlock: | |
448 | mutex_unlock(&input->mutex); | |
449 | ||
450 | return ret; | |
451 | } | |
452 | ||
453 | static int auo_pixcir_resume(struct device *dev) | |
454 | { | |
455 | struct i2c_client *client = to_i2c_client(dev); | |
456 | struct auo_pixcir_ts *ts = i2c_get_clientdata(client); | |
457 | struct input_dev *input = ts->input; | |
458 | int ret = 0; | |
459 | ||
460 | mutex_lock(&input->mutex); | |
461 | ||
462 | if (device_may_wakeup(&client->dev)) { | |
463 | disable_irq_wake(client->irq); | |
464 | ||
465 | /* need to stop device if it was not open on suspend */ | |
466 | if (!input->users) { | |
467 | ret = auo_pixcir_stop(ts); | |
468 | if (ret) | |
469 | goto unlock; | |
470 | } | |
471 | ||
472 | /* device wakes automatically from SLEEP */ | |
473 | } else if (input->users) { | |
474 | ret = auo_pixcir_start(ts); | |
475 | } | |
476 | ||
477 | unlock: | |
478 | mutex_unlock(&input->mutex); | |
479 | ||
480 | return ret; | |
481 | } | |
482 | #endif | |
483 | ||
7241443f HS |
484 | static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops, |
485 | auo_pixcir_suspend, auo_pixcir_resume); | |
486 | ||
487 | #ifdef CONFIG_OF | |
488 | static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) | |
489 | { | |
490 | struct auo_pixcir_ts_platdata *pdata; | |
491 | struct device_node *np = dev->of_node; | |
492 | ||
493 | if (!np) | |
494 | return ERR_PTR(-ENOENT); | |
495 | ||
496 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
497 | if (!pdata) { | |
498 | dev_err(dev, "failed to allocate platform data\n"); | |
499 | return ERR_PTR(-ENOMEM); | |
500 | } | |
501 | ||
502 | pdata->gpio_int = of_get_gpio(np, 0); | |
503 | if (!gpio_is_valid(pdata->gpio_int)) { | |
504 | dev_err(dev, "failed to get interrupt gpio\n"); | |
505 | return ERR_PTR(-EINVAL); | |
506 | } | |
507 | ||
508 | pdata->gpio_rst = of_get_gpio(np, 1); | |
509 | if (!gpio_is_valid(pdata->gpio_rst)) { | |
510 | dev_err(dev, "failed to get reset gpio\n"); | |
511 | return ERR_PTR(-EINVAL); | |
512 | } | |
513 | ||
514 | if (of_property_read_u32(np, "x-size", &pdata->x_max)) { | |
515 | dev_err(dev, "failed to get x-size property\n"); | |
516 | return ERR_PTR(-EINVAL); | |
517 | } | |
518 | ||
519 | if (of_property_read_u32(np, "y-size", &pdata->y_max)) { | |
520 | dev_err(dev, "failed to get y-size property\n"); | |
521 | return ERR_PTR(-EINVAL); | |
522 | } | |
523 | ||
524 | /* default to asserting the interrupt when the screen is touched */ | |
525 | pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND; | |
526 | ||
527 | return pdata; | |
528 | } | |
529 | #else | |
530 | static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) | |
531 | { | |
532 | return ERR_PTR(-EINVAL); | |
533 | } | |
534 | #endif | |
5245db49 | 535 | |
bfc29e95 DT |
536 | static void auo_pixcir_reset(void *data) |
537 | { | |
538 | struct auo_pixcir_ts *ts = data; | |
539 | ||
540 | gpio_set_value(ts->pdata->gpio_rst, 0); | |
541 | } | |
542 | ||
5298cc4c | 543 | static int auo_pixcir_probe(struct i2c_client *client, |
bfc29e95 | 544 | const struct i2c_device_id *id) |
5245db49 | 545 | { |
7241443f | 546 | const struct auo_pixcir_ts_platdata *pdata; |
5245db49 HS |
547 | struct auo_pixcir_ts *ts; |
548 | struct input_dev *input_dev; | |
bfc29e95 DT |
549 | int version; |
550 | int error; | |
5245db49 | 551 | |
7241443f HS |
552 | pdata = dev_get_platdata(&client->dev); |
553 | if (!pdata) { | |
554 | pdata = auo_pixcir_parse_dt(&client->dev); | |
555 | if (IS_ERR(pdata)) | |
556 | return PTR_ERR(pdata); | |
557 | } | |
5245db49 | 558 | |
bfc29e95 DT |
559 | ts = devm_kzalloc(&client->dev, |
560 | sizeof(struct auo_pixcir_ts), GFP_KERNEL); | |
5245db49 HS |
561 | if (!ts) |
562 | return -ENOMEM; | |
563 | ||
bfc29e95 DT |
564 | input_dev = devm_input_allocate_device(&client->dev); |
565 | if (!input_dev) { | |
566 | dev_err(&client->dev, "could not allocate input device\n"); | |
567 | return -ENOMEM; | |
27cef8b4 HS |
568 | } |
569 | ||
38e83f7f | 570 | ts->pdata = pdata; |
5245db49 | 571 | ts->client = client; |
bfc29e95 | 572 | ts->input = input_dev; |
5245db49 | 573 | ts->touch_ind_mode = 0; |
bfc29e95 | 574 | ts->stopped = true; |
5245db49 HS |
575 | init_waitqueue_head(&ts->wait); |
576 | ||
577 | snprintf(ts->phys, sizeof(ts->phys), | |
578 | "%s/input0", dev_name(&client->dev)); | |
579 | ||
5245db49 HS |
580 | input_dev->name = "AUO-Pixcir touchscreen"; |
581 | input_dev->phys = ts->phys; | |
582 | input_dev->id.bustype = BUS_I2C; | |
5245db49 HS |
583 | |
584 | input_dev->open = auo_pixcir_input_open; | |
585 | input_dev->close = auo_pixcir_input_close; | |
586 | ||
587 | __set_bit(EV_ABS, input_dev->evbit); | |
588 | __set_bit(EV_KEY, input_dev->evbit); | |
589 | ||
590 | __set_bit(BTN_TOUCH, input_dev->keybit); | |
591 | ||
592 | /* For single touch */ | |
593 | input_set_abs_params(input_dev, ABS_X, 0, pdata->x_max, 0, 0); | |
594 | input_set_abs_params(input_dev, ABS_Y, 0, pdata->y_max, 0, 0); | |
595 | ||
596 | /* For multi touch */ | |
597 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, | |
598 | pdata->x_max, 0, 0); | |
599 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, | |
600 | pdata->y_max, 0, 0); | |
601 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, | |
602 | AUO_PIXCIR_MAX_AREA, 0, 0); | |
603 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, | |
604 | AUO_PIXCIR_MAX_AREA, 0, 0); | |
605 | input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); | |
606 | ||
5245db49 | 607 | input_set_drvdata(ts->input, ts); |
5245db49 | 608 | |
bfc29e95 DT |
609 | error = devm_gpio_request_one(&client->dev, pdata->gpio_int, |
610 | GPIOF_DIR_IN, "auo_pixcir_ts_int"); | |
611 | if (error) { | |
612 | dev_err(&client->dev, "request of gpio %d failed, %d\n", | |
613 | pdata->gpio_int, error); | |
614 | return error; | |
5245db49 HS |
615 | } |
616 | ||
bfc29e95 DT |
617 | error = devm_gpio_request_one(&client->dev, pdata->gpio_rst, |
618 | GPIOF_DIR_OUT | GPIOF_INIT_HIGH, | |
619 | "auo_pixcir_ts_rst"); | |
620 | if (error) { | |
621 | dev_err(&client->dev, "request of gpio %d failed, %d\n", | |
622 | pdata->gpio_rst, error); | |
623 | return error; | |
5245db49 HS |
624 | } |
625 | ||
bfc29e95 DT |
626 | error = devm_add_action(&client->dev, auo_pixcir_reset, ts); |
627 | if (error) { | |
628 | auo_pixcir_reset(ts); | |
629 | dev_err(&client->dev, "failed to register reset action, %d\n", | |
630 | error); | |
631 | return error; | |
632 | } | |
5245db49 | 633 | |
bfc29e95 | 634 | msleep(200); |
5245db49 | 635 | |
bfc29e95 DT |
636 | version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION); |
637 | if (version < 0) { | |
638 | error = version; | |
639 | return error; | |
640 | } | |
5245db49 | 641 | |
bfc29e95 | 642 | dev_info(&client->dev, "firmware version 0x%X\n", version); |
5245db49 | 643 | |
bfc29e95 DT |
644 | error = auo_pixcir_int_config(ts, pdata->int_setting); |
645 | if (error) | |
646 | return error; | |
5245db49 | 647 | |
bfc29e95 DT |
648 | error = devm_request_threaded_irq(&client->dev, client->irq, |
649 | NULL, auo_pixcir_interrupt, | |
650 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
651 | input_dev->name, ts); | |
652 | if (error) { | |
653 | dev_err(&client->dev, "irq %d requested failed, %d\n", | |
654 | client->irq, error); | |
655 | return error; | |
656 | } | |
5245db49 | 657 | |
bfc29e95 DT |
658 | /* stop device and put it into deep sleep until it is opened */ |
659 | error = auo_pixcir_stop(ts); | |
660 | if (error) | |
661 | return error; | |
662 | ||
663 | error = input_register_device(input_dev); | |
664 | if (error) { | |
665 | dev_err(&client->dev, "could not register input device, %d\n", | |
666 | error); | |
667 | return error; | |
668 | } | |
5245db49 | 669 | |
bfc29e95 | 670 | i2c_set_clientdata(client, ts); |
5245db49 HS |
671 | |
672 | return 0; | |
673 | } | |
674 | ||
675 | static const struct i2c_device_id auo_pixcir_idtable[] = { | |
676 | { "auo_pixcir_ts", 0 }, | |
677 | { } | |
678 | }; | |
679 | MODULE_DEVICE_TABLE(i2c, auo_pixcir_idtable); | |
680 | ||
7241443f HS |
681 | #ifdef CONFIG_OF |
682 | static struct of_device_id auo_pixcir_ts_dt_idtable[] = { | |
683 | { .compatible = "auo,auo_pixcir_ts" }, | |
684 | {}, | |
685 | }; | |
686 | MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable); | |
687 | #endif | |
688 | ||
5245db49 HS |
689 | static struct i2c_driver auo_pixcir_driver = { |
690 | .driver = { | |
691 | .owner = THIS_MODULE, | |
692 | .name = "auo_pixcir_ts", | |
693 | .pm = &auo_pixcir_pm_ops, | |
7241443f | 694 | .of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable), |
5245db49 HS |
695 | }, |
696 | .probe = auo_pixcir_probe, | |
5245db49 HS |
697 | .id_table = auo_pixcir_idtable, |
698 | }; | |
699 | ||
4a533835 | 700 | module_i2c_driver(auo_pixcir_driver); |
5245db49 HS |
701 | |
702 | MODULE_DESCRIPTION("AUO-PIXCIR touchscreen driver"); | |
703 | MODULE_LICENSE("GPL v2"); | |
704 | MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); |