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c7efd123 YY |
1 | /* |
2 | * ROHM BU21023/24 Dual touch support resistive touch screen driver | |
3 | * Copyright (C) 2012 ROHM CO.,LTD. | |
4 | * | |
5 | * This software is licensed under the terms of the GNU General Public | |
6 | * License version 2, as published by the Free Software Foundation, and | |
7 | * may be copied, distributed, and modified under those terms. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | */ | |
14 | #include <linux/delay.h> | |
15 | #include <linux/firmware.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/input.h> | |
18 | #include <linux/input/mt.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/slab.h> | |
22 | ||
23 | #define BU21023_NAME "bu21023_ts" | |
24 | #define BU21023_FIRMWARE_NAME "bu21023.bin" | |
25 | ||
26 | #define MAX_CONTACTS 2 | |
27 | ||
28 | #define AXIS_ADJUST 4 | |
29 | #define AXIS_OFFSET 8 | |
30 | ||
31 | #define FIRMWARE_BLOCK_SIZE 32U | |
32 | #define FIRMWARE_RETRY_MAX 4 | |
33 | ||
34 | #define SAMPLING_DELAY 12 /* msec */ | |
35 | ||
36 | #define CALIBRATION_RETRY_MAX 6 | |
37 | ||
38 | #define ROHM_TS_ABS_X_MIN 40 | |
39 | #define ROHM_TS_ABS_X_MAX 990 | |
40 | #define ROHM_TS_ABS_Y_MIN 160 | |
41 | #define ROHM_TS_ABS_Y_MAX 920 | |
42 | #define ROHM_TS_DISPLACEMENT_MAX 0 /* zero for infinite */ | |
43 | ||
44 | /* | |
45 | * BU21023GUL/BU21023MUV/BU21024FV-M registers map | |
46 | */ | |
47 | #define VADOUT_YP_H 0x00 | |
48 | #define VADOUT_YP_L 0x01 | |
49 | #define VADOUT_XP_H 0x02 | |
50 | #define VADOUT_XP_L 0x03 | |
51 | #define VADOUT_YN_H 0x04 | |
52 | #define VADOUT_YN_L 0x05 | |
53 | #define VADOUT_XN_H 0x06 | |
54 | #define VADOUT_XN_L 0x07 | |
55 | ||
56 | #define PRM1_X_H 0x08 | |
57 | #define PRM1_X_L 0x09 | |
58 | #define PRM1_Y_H 0x0a | |
59 | #define PRM1_Y_L 0x0b | |
60 | #define PRM2_X_H 0x0c | |
61 | #define PRM2_X_L 0x0d | |
62 | #define PRM2_Y_H 0x0e | |
63 | #define PRM2_Y_L 0x0f | |
64 | ||
65 | #define MLT_PRM_MONI_X 0x10 | |
66 | #define MLT_PRM_MONI_Y 0x11 | |
67 | ||
68 | #define DEBUG_MONI_1 0x12 | |
69 | #define DEBUG_MONI_2 0x13 | |
70 | ||
71 | #define VADOUT_ZX_H 0x14 | |
72 | #define VADOUT_ZX_L 0x15 | |
73 | #define VADOUT_ZY_H 0x16 | |
74 | #define VADOUT_ZY_L 0x17 | |
75 | ||
76 | #define Z_PARAM_H 0x18 | |
77 | #define Z_PARAM_L 0x19 | |
78 | ||
79 | /* | |
80 | * Value for VADOUT_*_L | |
81 | */ | |
82 | #define VADOUT_L_MASK 0x01 | |
83 | ||
84 | /* | |
85 | * Value for PRM*_*_L | |
86 | */ | |
87 | #define PRM_L_MASK 0x01 | |
88 | ||
89 | #define POS_X1_H 0x20 | |
90 | #define POS_X1_L 0x21 | |
91 | #define POS_Y1_H 0x22 | |
92 | #define POS_Y1_L 0x23 | |
93 | #define POS_X2_H 0x24 | |
94 | #define POS_X2_L 0x25 | |
95 | #define POS_Y2_H 0x26 | |
96 | #define POS_Y2_L 0x27 | |
97 | ||
98 | /* | |
99 | * Value for POS_*_L | |
100 | */ | |
101 | #define POS_L_MASK 0x01 | |
102 | ||
103 | #define TOUCH 0x28 | |
104 | #define TOUCH_DETECT 0x01 | |
105 | ||
106 | #define TOUCH_GESTURE 0x29 | |
107 | #define SINGLE_TOUCH 0x01 | |
108 | #define DUAL_TOUCH 0x03 | |
109 | #define TOUCH_MASK 0x03 | |
110 | #define CALIBRATION_REQUEST 0x04 | |
111 | #define CALIBRATION_STATUS 0x08 | |
112 | #define CALIBRATION_MASK 0x0c | |
113 | #define GESTURE_SPREAD 0x10 | |
114 | #define GESTURE_PINCH 0x20 | |
115 | #define GESTURE_ROTATE_R 0x40 | |
116 | #define GESTURE_ROTATE_L 0x80 | |
117 | ||
118 | #define INT_STATUS 0x2a | |
119 | #define INT_MASK 0x3d | |
120 | #define INT_CLEAR 0x3e | |
121 | ||
122 | /* | |
123 | * Values for INT_* | |
124 | */ | |
125 | #define COORD_UPDATE 0x01 | |
126 | #define CALIBRATION_DONE 0x02 | |
127 | #define SLEEP_IN 0x04 | |
128 | #define SLEEP_OUT 0x08 | |
129 | #define PROGRAM_LOAD_DONE 0x10 | |
130 | #define ERROR 0x80 | |
131 | #define INT_ALL 0x9f | |
132 | ||
133 | #define ERR_STATUS 0x2b | |
134 | #define ERR_MASK 0x3f | |
135 | ||
136 | /* | |
137 | * Values for ERR_* | |
138 | */ | |
139 | #define ADC_TIMEOUT 0x01 | |
140 | #define CPU_TIMEOUT 0x02 | |
141 | #define CALIBRATION_ERR 0x04 | |
142 | #define PROGRAM_LOAD_ERR 0x10 | |
143 | ||
144 | #define COMMON_SETUP1 0x30 | |
145 | #define PROGRAM_LOAD_HOST 0x02 | |
146 | #define PROGRAM_LOAD_EEPROM 0x03 | |
147 | #define CENSOR_4PORT 0x04 | |
148 | #define CENSOR_8PORT 0x00 /* Not supported by BU21023 */ | |
149 | #define CALIBRATION_TYPE_DEFAULT 0x08 | |
150 | #define CALIBRATION_TYPE_SPECIAL 0x00 | |
151 | #define INT_ACTIVE_HIGH 0x10 | |
152 | #define INT_ACTIVE_LOW 0x00 | |
153 | #define AUTO_CALIBRATION 0x40 | |
154 | #define MANUAL_CALIBRATION 0x00 | |
155 | #define COMMON_SETUP1_DEFAULT 0x4e | |
156 | ||
157 | #define COMMON_SETUP2 0x31 | |
158 | #define MAF_NONE 0x00 | |
159 | #define MAF_1SAMPLE 0x01 | |
160 | #define MAF_3SAMPLES 0x02 | |
161 | #define MAF_5SAMPLES 0x03 | |
162 | #define INV_Y 0x04 | |
163 | #define INV_X 0x08 | |
164 | #define SWAP_XY 0x10 | |
165 | ||
166 | #define COMMON_SETUP3 0x32 | |
167 | #define EN_SLEEP 0x01 | |
168 | #define EN_MULTI 0x02 | |
169 | #define EN_GESTURE 0x04 | |
170 | #define EN_INTVL 0x08 | |
171 | #define SEL_STEP 0x10 | |
172 | #define SEL_MULTI 0x20 | |
173 | #define SEL_TBL_DEFAULT 0x40 | |
174 | ||
175 | #define INTERVAL_TIME 0x33 | |
176 | #define INTERVAL_TIME_DEFAULT 0x10 | |
177 | ||
178 | #define STEP_X 0x34 | |
179 | #define STEP_X_DEFAULT 0x41 | |
180 | ||
181 | #define STEP_Y 0x35 | |
182 | #define STEP_Y_DEFAULT 0x8d | |
183 | ||
184 | #define OFFSET_X 0x38 | |
185 | #define OFFSET_X_DEFAULT 0x0c | |
186 | ||
187 | #define OFFSET_Y 0x39 | |
188 | #define OFFSET_Y_DEFAULT 0x0c | |
189 | ||
190 | #define THRESHOLD_TOUCH 0x3a | |
191 | #define THRESHOLD_TOUCH_DEFAULT 0xa0 | |
192 | ||
193 | #define THRESHOLD_GESTURE 0x3b | |
194 | #define THRESHOLD_GESTURE_DEFAULT 0x17 | |
195 | ||
196 | #define SYSTEM 0x40 | |
197 | #define ANALOG_POWER_ON 0x01 | |
198 | #define ANALOG_POWER_OFF 0x00 | |
199 | #define CPU_POWER_ON 0x02 | |
200 | #define CPU_POWER_OFF 0x00 | |
201 | ||
202 | #define FORCE_CALIBRATION 0x42 | |
203 | #define FORCE_CALIBRATION_ON 0x01 | |
204 | #define FORCE_CALIBRATION_OFF 0x00 | |
205 | ||
206 | #define CPU_FREQ 0x50 /* 10 / (reg + 1) MHz */ | |
207 | #define CPU_FREQ_10MHZ 0x00 | |
208 | #define CPU_FREQ_5MHZ 0x01 | |
209 | #define CPU_FREQ_1MHZ 0x09 | |
210 | ||
211 | #define EEPROM_ADDR 0x51 | |
212 | ||
213 | #define CALIBRATION_ADJUST 0x52 | |
214 | #define CALIBRATION_ADJUST_DEFAULT 0x00 | |
215 | ||
216 | #define THRESHOLD_SLEEP_IN 0x53 | |
217 | ||
218 | #define EVR_XY 0x56 | |
219 | #define EVR_XY_DEFAULT 0x10 | |
220 | ||
221 | #define PRM_SWOFF_TIME 0x57 | |
222 | #define PRM_SWOFF_TIME_DEFAULT 0x04 | |
223 | ||
224 | #define PROGRAM_VERSION 0x5f | |
225 | ||
226 | #define ADC_CTRL 0x60 | |
227 | #define ADC_DIV_MASK 0x1f /* The minimum value is 4 */ | |
228 | #define ADC_DIV_DEFAULT 0x08 | |
229 | ||
230 | #define ADC_WAIT 0x61 | |
231 | #define ADC_WAIT_DEFAULT 0x0a | |
232 | ||
233 | #define SWCONT 0x62 | |
234 | #define SWCONT_DEFAULT 0x0f | |
235 | ||
236 | #define EVR_X 0x63 | |
237 | #define EVR_X_DEFAULT 0x86 | |
238 | ||
239 | #define EVR_Y 0x64 | |
240 | #define EVR_Y_DEFAULT 0x64 | |
241 | ||
242 | #define TEST1 0x65 | |
243 | #define DUALTOUCH_STABILIZE_ON 0x01 | |
244 | #define DUALTOUCH_STABILIZE_OFF 0x00 | |
245 | #define DUALTOUCH_REG_ON 0x20 | |
246 | #define DUALTOUCH_REG_OFF 0x00 | |
247 | ||
248 | #define CALIBRATION_REG1 0x68 | |
249 | #define CALIBRATION_REG1_DEFAULT 0xd9 | |
250 | ||
251 | #define CALIBRATION_REG2 0x69 | |
252 | #define CALIBRATION_REG2_DEFAULT 0x36 | |
253 | ||
254 | #define CALIBRATION_REG3 0x6a | |
255 | #define CALIBRATION_REG3_DEFAULT 0x32 | |
256 | ||
257 | #define EX_ADDR_H 0x70 | |
258 | #define EX_ADDR_L 0x71 | |
259 | #define EX_WDAT 0x72 | |
260 | #define EX_RDAT 0x73 | |
261 | #define EX_CHK_SUM1 0x74 | |
262 | #define EX_CHK_SUM2 0x75 | |
263 | #define EX_CHK_SUM3 0x76 | |
264 | ||
265 | struct rohm_ts_data { | |
266 | struct i2c_client *client; | |
267 | struct input_dev *input; | |
268 | ||
269 | bool initialized; | |
270 | ||
271 | unsigned int contact_count[MAX_CONTACTS + 1]; | |
272 | int finger_count; | |
273 | ||
274 | u8 setup2; | |
275 | }; | |
276 | ||
277 | /* | |
278 | * rohm_i2c_burst_read - execute combined I2C message for ROHM BU21023/24 | |
279 | * @client: Handle to ROHM BU21023/24 | |
280 | * @start: Where to start read address from ROHM BU21023/24 | |
281 | * @buf: Where to store read data from ROHM BU21023/24 | |
282 | * @len: How many bytes to read | |
283 | * | |
284 | * Returns negative errno, else zero on success. | |
285 | * | |
286 | * Note | |
287 | * In BU21023/24 burst read, stop condition is needed after "address write". | |
288 | * Therefore, transmission is performed in 2 steps. | |
289 | */ | |
290 | static int rohm_i2c_burst_read(struct i2c_client *client, u8 start, void *buf, | |
291 | size_t len) | |
292 | { | |
293 | struct i2c_adapter *adap = client->adapter; | |
294 | struct i2c_msg msg[2]; | |
295 | int i, ret = 0; | |
296 | ||
297 | msg[0].addr = client->addr; | |
298 | msg[0].flags = 0; | |
299 | msg[0].len = 1; | |
300 | msg[0].buf = &start; | |
301 | ||
302 | msg[1].addr = client->addr; | |
303 | msg[1].flags = I2C_M_RD; | |
304 | msg[1].len = len; | |
305 | msg[1].buf = buf; | |
306 | ||
193c2a07 | 307 | i2c_lock_bus(adap, I2C_LOCK_SEGMENT); |
c7efd123 YY |
308 | |
309 | for (i = 0; i < 2; i++) { | |
310 | if (__i2c_transfer(adap, &msg[i], 1) < 0) { | |
311 | ret = -EIO; | |
312 | break; | |
313 | } | |
314 | } | |
315 | ||
193c2a07 | 316 | i2c_unlock_bus(adap, I2C_LOCK_SEGMENT); |
c7efd123 YY |
317 | |
318 | return ret; | |
319 | } | |
320 | ||
321 | static int rohm_ts_manual_calibration(struct rohm_ts_data *ts) | |
322 | { | |
323 | struct i2c_client *client = ts->client; | |
324 | struct device *dev = &client->dev; | |
325 | u8 buf[33]; /* for PRM1_X_H(0x08)-TOUCH(0x28) */ | |
326 | ||
327 | int retry; | |
328 | bool success = false; | |
329 | bool first_time = true; | |
330 | bool calibration_done; | |
331 | ||
332 | u8 reg1, reg2, reg3; | |
333 | s32 reg1_orig, reg2_orig, reg3_orig; | |
334 | s32 val; | |
335 | ||
336 | int calib_x = 0, calib_y = 0; | |
337 | int reg_x, reg_y; | |
338 | int err_x, err_y; | |
339 | ||
340 | int error, error2; | |
341 | int i; | |
342 | ||
343 | reg1_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG1); | |
344 | if (reg1_orig < 0) | |
345 | return reg1_orig; | |
346 | ||
347 | reg2_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG2); | |
348 | if (reg2_orig < 0) | |
349 | return reg2_orig; | |
350 | ||
351 | reg3_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG3); | |
352 | if (reg3_orig < 0) | |
353 | return reg3_orig; | |
354 | ||
355 | error = i2c_smbus_write_byte_data(client, INT_MASK, | |
356 | COORD_UPDATE | SLEEP_IN | SLEEP_OUT | | |
357 | PROGRAM_LOAD_DONE); | |
358 | if (error) | |
359 | goto out; | |
360 | ||
361 | error = i2c_smbus_write_byte_data(client, TEST1, | |
362 | DUALTOUCH_STABILIZE_ON); | |
363 | if (error) | |
364 | goto out; | |
365 | ||
366 | for (retry = 0; retry < CALIBRATION_RETRY_MAX; retry++) { | |
367 | /* wait 2 sampling for update */ | |
368 | mdelay(2 * SAMPLING_DELAY); | |
369 | ||
370 | #define READ_CALIB_BUF(reg) buf[((reg) - PRM1_X_H)] | |
371 | ||
372 | error = rohm_i2c_burst_read(client, PRM1_X_H, buf, sizeof(buf)); | |
373 | if (error) | |
374 | goto out; | |
375 | ||
376 | if (READ_CALIB_BUF(TOUCH) & TOUCH_DETECT) | |
377 | continue; | |
378 | ||
379 | if (first_time) { | |
380 | /* generate calibration parameter */ | |
381 | calib_x = ((int)READ_CALIB_BUF(PRM1_X_H) << 2 | | |
382 | READ_CALIB_BUF(PRM1_X_L)) - AXIS_OFFSET; | |
383 | calib_y = ((int)READ_CALIB_BUF(PRM1_Y_H) << 2 | | |
384 | READ_CALIB_BUF(PRM1_Y_L)) - AXIS_OFFSET; | |
385 | ||
386 | error = i2c_smbus_write_byte_data(client, TEST1, | |
387 | DUALTOUCH_STABILIZE_ON | DUALTOUCH_REG_ON); | |
388 | if (error) | |
389 | goto out; | |
390 | ||
391 | first_time = false; | |
392 | } else { | |
393 | /* generate adjustment parameter */ | |
394 | err_x = (int)READ_CALIB_BUF(PRM1_X_H) << 2 | | |
395 | READ_CALIB_BUF(PRM1_X_L); | |
396 | err_y = (int)READ_CALIB_BUF(PRM1_Y_H) << 2 | | |
397 | READ_CALIB_BUF(PRM1_Y_L); | |
398 | ||
399 | /* X axis ajust */ | |
400 | if (err_x <= 4) | |
401 | calib_x -= AXIS_ADJUST; | |
402 | else if (err_x >= 60) | |
403 | calib_x += AXIS_ADJUST; | |
404 | ||
405 | /* Y axis ajust */ | |
406 | if (err_y <= 4) | |
407 | calib_y -= AXIS_ADJUST; | |
408 | else if (err_y >= 60) | |
409 | calib_y += AXIS_ADJUST; | |
410 | } | |
411 | ||
412 | /* generate calibration setting value */ | |
413 | reg_x = calib_x + ((calib_x & 0x200) << 1); | |
414 | reg_y = calib_y + ((calib_y & 0x200) << 1); | |
415 | ||
416 | /* convert for register format */ | |
417 | reg1 = reg_x >> 3; | |
418 | reg2 = (reg_y & 0x7) << 4 | (reg_x & 0x7); | |
419 | reg3 = reg_y >> 3; | |
420 | ||
421 | error = i2c_smbus_write_byte_data(client, | |
422 | CALIBRATION_REG1, reg1); | |
423 | if (error) | |
424 | goto out; | |
425 | ||
426 | error = i2c_smbus_write_byte_data(client, | |
427 | CALIBRATION_REG2, reg2); | |
428 | if (error) | |
429 | goto out; | |
430 | ||
431 | error = i2c_smbus_write_byte_data(client, | |
432 | CALIBRATION_REG3, reg3); | |
433 | if (error) | |
434 | goto out; | |
435 | ||
436 | /* | |
437 | * force calibration sequcence | |
438 | */ | |
439 | error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION, | |
440 | FORCE_CALIBRATION_OFF); | |
441 | if (error) | |
442 | goto out; | |
443 | ||
444 | error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION, | |
445 | FORCE_CALIBRATION_ON); | |
446 | if (error) | |
447 | goto out; | |
448 | ||
449 | /* clear all interrupts */ | |
450 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
451 | if (error) | |
452 | goto out; | |
453 | ||
454 | /* | |
455 | * Wait for the status change of calibration, max 10 sampling | |
456 | */ | |
457 | calibration_done = false; | |
458 | ||
459 | for (i = 0; i < 10; i++) { | |
460 | mdelay(SAMPLING_DELAY); | |
461 | ||
462 | val = i2c_smbus_read_byte_data(client, TOUCH_GESTURE); | |
463 | if (!(val & CALIBRATION_MASK)) { | |
464 | calibration_done = true; | |
465 | break; | |
466 | } else if (val < 0) { | |
467 | error = val; | |
468 | goto out; | |
469 | } | |
470 | } | |
471 | ||
472 | if (calibration_done) { | |
473 | val = i2c_smbus_read_byte_data(client, INT_STATUS); | |
474 | if (val == CALIBRATION_DONE) { | |
475 | success = true; | |
476 | break; | |
477 | } else if (val < 0) { | |
478 | error = val; | |
479 | goto out; | |
480 | } | |
481 | } else { | |
482 | dev_warn(dev, "calibration timeout\n"); | |
483 | } | |
484 | } | |
485 | ||
486 | if (!success) { | |
487 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1, | |
488 | reg1_orig); | |
489 | if (error) | |
490 | goto out; | |
491 | ||
492 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2, | |
493 | reg2_orig); | |
494 | if (error) | |
495 | goto out; | |
496 | ||
497 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG3, | |
498 | reg3_orig); | |
499 | if (error) | |
500 | goto out; | |
501 | ||
502 | /* calibration data enable */ | |
503 | error = i2c_smbus_write_byte_data(client, TEST1, | |
504 | DUALTOUCH_STABILIZE_ON | | |
505 | DUALTOUCH_REG_ON); | |
506 | if (error) | |
507 | goto out; | |
508 | ||
509 | /* wait 10 sampling */ | |
510 | mdelay(10 * SAMPLING_DELAY); | |
511 | ||
512 | error = -EBUSY; | |
513 | } | |
514 | ||
515 | out: | |
516 | error2 = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL); | |
517 | if (!error2) | |
518 | /* Clear all interrupts */ | |
519 | error2 = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
520 | ||
521 | return error ? error : error2; | |
522 | } | |
523 | ||
524 | static const unsigned int untouch_threshold[3] = { 0, 1, 5 }; | |
525 | static const unsigned int single_touch_threshold[3] = { 0, 0, 4 }; | |
526 | static const unsigned int dual_touch_threshold[3] = { 10, 8, 0 }; | |
527 | ||
528 | static irqreturn_t rohm_ts_soft_irq(int irq, void *dev_id) | |
529 | { | |
530 | struct rohm_ts_data *ts = dev_id; | |
531 | struct i2c_client *client = ts->client; | |
532 | struct input_dev *input_dev = ts->input; | |
533 | struct device *dev = &client->dev; | |
534 | ||
535 | u8 buf[10]; /* for POS_X1_H(0x20)-TOUCH_GESTURE(0x29) */ | |
536 | ||
537 | struct input_mt_pos pos[MAX_CONTACTS]; | |
538 | int slots[MAX_CONTACTS]; | |
539 | u8 touch_flags; | |
540 | unsigned int threshold; | |
541 | int finger_count = -1; | |
542 | int prev_finger_count = ts->finger_count; | |
543 | int count; | |
544 | int error; | |
545 | int i; | |
546 | ||
547 | error = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL); | |
548 | if (error) | |
549 | return IRQ_HANDLED; | |
550 | ||
551 | /* Clear all interrupts */ | |
552 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
553 | if (error) | |
554 | return IRQ_HANDLED; | |
555 | ||
556 | #define READ_POS_BUF(reg) buf[((reg) - POS_X1_H)] | |
557 | ||
558 | error = rohm_i2c_burst_read(client, POS_X1_H, buf, sizeof(buf)); | |
559 | if (error) | |
560 | return IRQ_HANDLED; | |
561 | ||
562 | touch_flags = READ_POS_BUF(TOUCH_GESTURE) & TOUCH_MASK; | |
563 | if (touch_flags) { | |
564 | /* generate coordinates */ | |
565 | pos[0].x = ((s16)READ_POS_BUF(POS_X1_H) << 2) | | |
566 | READ_POS_BUF(POS_X1_L); | |
567 | pos[0].y = ((s16)READ_POS_BUF(POS_Y1_H) << 2) | | |
568 | READ_POS_BUF(POS_Y1_L); | |
569 | pos[1].x = ((s16)READ_POS_BUF(POS_X2_H) << 2) | | |
570 | READ_POS_BUF(POS_X2_L); | |
571 | pos[1].y = ((s16)READ_POS_BUF(POS_Y2_H) << 2) | | |
572 | READ_POS_BUF(POS_Y2_L); | |
573 | } | |
574 | ||
575 | switch (touch_flags) { | |
576 | case 0: | |
577 | threshold = untouch_threshold[prev_finger_count]; | |
578 | if (++ts->contact_count[0] >= threshold) | |
579 | finger_count = 0; | |
580 | break; | |
581 | ||
582 | case SINGLE_TOUCH: | |
583 | threshold = single_touch_threshold[prev_finger_count]; | |
584 | if (++ts->contact_count[1] >= threshold) | |
585 | finger_count = 1; | |
586 | ||
587 | if (finger_count == 1) { | |
588 | if (pos[1].x != 0 && pos[1].y != 0) { | |
589 | pos[0].x = pos[1].x; | |
590 | pos[0].y = pos[1].y; | |
591 | pos[1].x = 0; | |
592 | pos[1].y = 0; | |
593 | } | |
594 | } | |
595 | break; | |
596 | ||
597 | case DUAL_TOUCH: | |
598 | threshold = dual_touch_threshold[prev_finger_count]; | |
599 | if (++ts->contact_count[2] >= threshold) | |
600 | finger_count = 2; | |
601 | break; | |
602 | ||
603 | default: | |
604 | dev_dbg(dev, | |
605 | "Three or more touches are not supported\n"); | |
606 | return IRQ_HANDLED; | |
607 | } | |
608 | ||
609 | if (finger_count >= 0) { | |
610 | if (prev_finger_count != finger_count) { | |
611 | count = ts->contact_count[finger_count]; | |
612 | memset(ts->contact_count, 0, sizeof(ts->contact_count)); | |
613 | ts->contact_count[finger_count] = count; | |
614 | } | |
615 | ||
616 | input_mt_assign_slots(input_dev, slots, pos, | |
617 | finger_count, ROHM_TS_DISPLACEMENT_MAX); | |
618 | ||
619 | for (i = 0; i < finger_count; i++) { | |
620 | input_mt_slot(input_dev, slots[i]); | |
621 | input_mt_report_slot_state(input_dev, | |
622 | MT_TOOL_FINGER, true); | |
623 | input_report_abs(input_dev, | |
624 | ABS_MT_POSITION_X, pos[i].x); | |
625 | input_report_abs(input_dev, | |
626 | ABS_MT_POSITION_Y, pos[i].y); | |
627 | } | |
628 | ||
629 | input_mt_sync_frame(input_dev); | |
630 | input_mt_report_pointer_emulation(input_dev, true); | |
631 | input_sync(input_dev); | |
632 | ||
633 | ts->finger_count = finger_count; | |
634 | } | |
635 | ||
636 | if (READ_POS_BUF(TOUCH_GESTURE) & CALIBRATION_REQUEST) { | |
637 | error = rohm_ts_manual_calibration(ts); | |
638 | if (error) | |
639 | dev_warn(dev, "manual calibration failed: %d\n", | |
640 | error); | |
641 | } | |
642 | ||
643 | i2c_smbus_write_byte_data(client, INT_MASK, | |
644 | CALIBRATION_DONE | SLEEP_OUT | SLEEP_IN | | |
645 | PROGRAM_LOAD_DONE); | |
646 | ||
647 | return IRQ_HANDLED; | |
648 | } | |
649 | ||
650 | static int rohm_ts_load_firmware(struct i2c_client *client, | |
651 | const char *firmware_name) | |
652 | { | |
653 | struct device *dev = &client->dev; | |
654 | const struct firmware *fw; | |
655 | s32 status; | |
656 | unsigned int offset, len, xfer_len; | |
657 | unsigned int retry = 0; | |
658 | int error, error2; | |
659 | ||
660 | error = request_firmware(&fw, firmware_name, dev); | |
661 | if (error) { | |
662 | dev_err(dev, "unable to retrieve firmware %s: %d\n", | |
663 | firmware_name, error); | |
664 | return error; | |
665 | } | |
666 | ||
667 | error = i2c_smbus_write_byte_data(client, INT_MASK, | |
668 | COORD_UPDATE | CALIBRATION_DONE | | |
669 | SLEEP_IN | SLEEP_OUT); | |
670 | if (error) | |
671 | goto out; | |
672 | ||
673 | do { | |
674 | if (retry) { | |
675 | dev_warn(dev, "retrying firmware load\n"); | |
676 | ||
677 | /* settings for retry */ | |
678 | error = i2c_smbus_write_byte_data(client, EX_WDAT, 0); | |
679 | if (error) | |
680 | goto out; | |
681 | } | |
682 | ||
683 | error = i2c_smbus_write_byte_data(client, EX_ADDR_H, 0); | |
684 | if (error) | |
685 | goto out; | |
686 | ||
687 | error = i2c_smbus_write_byte_data(client, EX_ADDR_L, 0); | |
688 | if (error) | |
689 | goto out; | |
690 | ||
691 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP1, | |
692 | COMMON_SETUP1_DEFAULT); | |
693 | if (error) | |
694 | goto out; | |
695 | ||
696 | /* firmware load to the device */ | |
697 | offset = 0; | |
698 | len = fw->size; | |
699 | ||
700 | while (len) { | |
701 | xfer_len = min(FIRMWARE_BLOCK_SIZE, len); | |
702 | ||
703 | error = i2c_smbus_write_i2c_block_data(client, EX_WDAT, | |
704 | xfer_len, &fw->data[offset]); | |
705 | if (error) | |
706 | goto out; | |
707 | ||
708 | len -= xfer_len; | |
709 | offset += xfer_len; | |
710 | } | |
711 | ||
712 | /* check firmware load result */ | |
713 | status = i2c_smbus_read_byte_data(client, INT_STATUS); | |
714 | if (status < 0) { | |
715 | error = status; | |
716 | goto out; | |
717 | } | |
718 | ||
719 | /* clear all interrupts */ | |
720 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
721 | if (error) | |
722 | goto out; | |
723 | ||
724 | if (status == PROGRAM_LOAD_DONE) | |
725 | break; | |
726 | ||
727 | error = -EIO; | |
415a249f | 728 | } while (++retry <= FIRMWARE_RETRY_MAX); |
c7efd123 YY |
729 | |
730 | out: | |
731 | error2 = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL); | |
732 | ||
733 | release_firmware(fw); | |
734 | ||
735 | return error ? error : error2; | |
736 | } | |
737 | ||
738 | static ssize_t swap_xy_show(struct device *dev, struct device_attribute *attr, | |
739 | char *buf) | |
740 | { | |
741 | struct i2c_client *client = to_i2c_client(dev); | |
742 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
743 | ||
744 | return sprintf(buf, "%d\n", !!(ts->setup2 & SWAP_XY)); | |
745 | } | |
746 | ||
747 | static ssize_t swap_xy_store(struct device *dev, struct device_attribute *attr, | |
748 | const char *buf, size_t count) | |
749 | { | |
750 | struct i2c_client *client = to_i2c_client(dev); | |
751 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
752 | unsigned int val; | |
753 | int error; | |
754 | ||
755 | error = kstrtouint(buf, 0, &val); | |
756 | if (error) | |
757 | return error; | |
758 | ||
759 | error = mutex_lock_interruptible(&ts->input->mutex); | |
760 | if (error) | |
761 | return error; | |
762 | ||
763 | if (val) | |
764 | ts->setup2 |= SWAP_XY; | |
765 | else | |
766 | ts->setup2 &= ~SWAP_XY; | |
767 | ||
768 | if (ts->initialized) | |
769 | error = i2c_smbus_write_byte_data(ts->client, COMMON_SETUP2, | |
770 | ts->setup2); | |
771 | ||
772 | mutex_unlock(&ts->input->mutex); | |
773 | ||
774 | return error ? error : count; | |
775 | } | |
776 | ||
777 | static ssize_t inv_x_show(struct device *dev, struct device_attribute *attr, | |
778 | char *buf) | |
779 | { | |
780 | struct i2c_client *client = to_i2c_client(dev); | |
781 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
782 | ||
783 | return sprintf(buf, "%d\n", !!(ts->setup2 & INV_X)); | |
784 | } | |
785 | ||
786 | static ssize_t inv_x_store(struct device *dev, struct device_attribute *attr, | |
787 | const char *buf, size_t count) | |
788 | { | |
789 | struct i2c_client *client = to_i2c_client(dev); | |
790 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
791 | unsigned int val; | |
792 | int error; | |
793 | ||
794 | error = kstrtouint(buf, 0, &val); | |
795 | if (error) | |
796 | return error; | |
797 | ||
798 | error = mutex_lock_interruptible(&ts->input->mutex); | |
799 | if (error) | |
800 | return error; | |
801 | ||
802 | if (val) | |
803 | ts->setup2 |= INV_X; | |
804 | else | |
805 | ts->setup2 &= ~INV_X; | |
806 | ||
807 | if (ts->initialized) | |
808 | error = i2c_smbus_write_byte_data(ts->client, COMMON_SETUP2, | |
809 | ts->setup2); | |
810 | ||
811 | mutex_unlock(&ts->input->mutex); | |
812 | ||
813 | return error ? error : count; | |
814 | } | |
815 | ||
816 | static ssize_t inv_y_show(struct device *dev, struct device_attribute *attr, | |
817 | char *buf) | |
818 | { | |
819 | struct i2c_client *client = to_i2c_client(dev); | |
820 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
821 | ||
822 | return sprintf(buf, "%d\n", !!(ts->setup2 & INV_Y)); | |
823 | } | |
824 | ||
825 | static ssize_t inv_y_store(struct device *dev, struct device_attribute *attr, | |
826 | const char *buf, size_t count) | |
827 | { | |
828 | struct i2c_client *client = to_i2c_client(dev); | |
829 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
830 | unsigned int val; | |
831 | int error; | |
832 | ||
833 | error = kstrtouint(buf, 0, &val); | |
834 | if (error) | |
835 | return error; | |
836 | ||
837 | error = mutex_lock_interruptible(&ts->input->mutex); | |
838 | if (error) | |
839 | return error; | |
840 | ||
841 | if (val) | |
842 | ts->setup2 |= INV_Y; | |
843 | else | |
844 | ts->setup2 &= ~INV_Y; | |
845 | ||
846 | if (ts->initialized) | |
847 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP2, | |
848 | ts->setup2); | |
849 | ||
850 | mutex_unlock(&ts->input->mutex); | |
851 | ||
852 | return error ? error : count; | |
853 | } | |
854 | ||
855 | static DEVICE_ATTR_RW(swap_xy); | |
856 | static DEVICE_ATTR_RW(inv_x); | |
857 | static DEVICE_ATTR_RW(inv_y); | |
858 | ||
859 | static struct attribute *rohm_ts_attrs[] = { | |
860 | &dev_attr_swap_xy.attr, | |
861 | &dev_attr_inv_x.attr, | |
862 | &dev_attr_inv_y.attr, | |
863 | NULL, | |
864 | }; | |
865 | ||
866 | static const struct attribute_group rohm_ts_attr_group = { | |
867 | .attrs = rohm_ts_attrs, | |
868 | }; | |
869 | ||
870 | static int rohm_ts_device_init(struct i2c_client *client, u8 setup2) | |
871 | { | |
872 | struct device *dev = &client->dev; | |
873 | int error; | |
874 | ||
875 | disable_irq(client->irq); | |
876 | ||
877 | /* | |
878 | * Wait 200usec for reset | |
879 | */ | |
880 | udelay(200); | |
881 | ||
882 | /* Release analog reset */ | |
883 | error = i2c_smbus_write_byte_data(client, SYSTEM, | |
884 | ANALOG_POWER_ON | CPU_POWER_OFF); | |
885 | if (error) | |
886 | return error; | |
887 | ||
888 | /* Waiting for the analog warm-up, max. 200usec */ | |
889 | udelay(200); | |
890 | ||
891 | /* clear all interrupts */ | |
892 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
893 | if (error) | |
894 | return error; | |
895 | ||
896 | error = i2c_smbus_write_byte_data(client, EX_WDAT, 0); | |
897 | if (error) | |
898 | return error; | |
899 | ||
900 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP1, 0); | |
901 | if (error) | |
902 | return error; | |
903 | ||
904 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP2, setup2); | |
905 | if (error) | |
906 | return error; | |
907 | ||
908 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP3, | |
909 | SEL_TBL_DEFAULT | EN_MULTI); | |
910 | if (error) | |
911 | return error; | |
912 | ||
913 | error = i2c_smbus_write_byte_data(client, THRESHOLD_GESTURE, | |
914 | THRESHOLD_GESTURE_DEFAULT); | |
915 | if (error) | |
916 | return error; | |
917 | ||
918 | error = i2c_smbus_write_byte_data(client, INTERVAL_TIME, | |
919 | INTERVAL_TIME_DEFAULT); | |
920 | if (error) | |
921 | return error; | |
922 | ||
923 | error = i2c_smbus_write_byte_data(client, CPU_FREQ, CPU_FREQ_10MHZ); | |
924 | if (error) | |
925 | return error; | |
926 | ||
927 | error = i2c_smbus_write_byte_data(client, PRM_SWOFF_TIME, | |
928 | PRM_SWOFF_TIME_DEFAULT); | |
929 | if (error) | |
930 | return error; | |
931 | ||
932 | error = i2c_smbus_write_byte_data(client, ADC_CTRL, ADC_DIV_DEFAULT); | |
933 | if (error) | |
934 | return error; | |
935 | ||
936 | error = i2c_smbus_write_byte_data(client, ADC_WAIT, ADC_WAIT_DEFAULT); | |
937 | if (error) | |
938 | return error; | |
939 | ||
940 | /* | |
941 | * Panel setup, these values change with the panel. | |
942 | */ | |
943 | error = i2c_smbus_write_byte_data(client, STEP_X, STEP_X_DEFAULT); | |
944 | if (error) | |
945 | return error; | |
946 | ||
947 | error = i2c_smbus_write_byte_data(client, STEP_Y, STEP_Y_DEFAULT); | |
948 | if (error) | |
949 | return error; | |
950 | ||
951 | error = i2c_smbus_write_byte_data(client, OFFSET_X, OFFSET_X_DEFAULT); | |
952 | if (error) | |
953 | return error; | |
954 | ||
955 | error = i2c_smbus_write_byte_data(client, OFFSET_Y, OFFSET_Y_DEFAULT); | |
956 | if (error) | |
957 | return error; | |
958 | ||
959 | error = i2c_smbus_write_byte_data(client, THRESHOLD_TOUCH, | |
960 | THRESHOLD_TOUCH_DEFAULT); | |
961 | if (error) | |
962 | return error; | |
963 | ||
964 | error = i2c_smbus_write_byte_data(client, EVR_XY, EVR_XY_DEFAULT); | |
965 | if (error) | |
966 | return error; | |
967 | ||
968 | error = i2c_smbus_write_byte_data(client, EVR_X, EVR_X_DEFAULT); | |
969 | if (error) | |
970 | return error; | |
971 | ||
972 | error = i2c_smbus_write_byte_data(client, EVR_Y, EVR_Y_DEFAULT); | |
973 | if (error) | |
974 | return error; | |
975 | ||
976 | /* Fixed value settings */ | |
977 | error = i2c_smbus_write_byte_data(client, CALIBRATION_ADJUST, | |
978 | CALIBRATION_ADJUST_DEFAULT); | |
979 | if (error) | |
980 | return error; | |
981 | ||
982 | error = i2c_smbus_write_byte_data(client, SWCONT, SWCONT_DEFAULT); | |
983 | if (error) | |
984 | return error; | |
985 | ||
986 | error = i2c_smbus_write_byte_data(client, TEST1, | |
987 | DUALTOUCH_STABILIZE_ON | | |
988 | DUALTOUCH_REG_ON); | |
989 | if (error) | |
990 | return error; | |
991 | ||
992 | error = rohm_ts_load_firmware(client, BU21023_FIRMWARE_NAME); | |
993 | if (error) { | |
994 | dev_err(dev, "failed to load firmware: %d\n", error); | |
995 | return error; | |
996 | } | |
997 | ||
998 | /* | |
999 | * Manual calibration results are not changed in same environment. | |
1000 | * If the force calibration is performed, | |
1001 | * the controller will not require calibration request interrupt | |
1002 | * when the typical values are set to the calibration registers. | |
1003 | */ | |
1004 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1, | |
1005 | CALIBRATION_REG1_DEFAULT); | |
1006 | if (error) | |
1007 | return error; | |
1008 | ||
1009 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2, | |
1010 | CALIBRATION_REG2_DEFAULT); | |
1011 | if (error) | |
1012 | return error; | |
1013 | ||
1014 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG3, | |
1015 | CALIBRATION_REG3_DEFAULT); | |
1016 | if (error) | |
1017 | return error; | |
1018 | ||
1019 | error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION, | |
1020 | FORCE_CALIBRATION_OFF); | |
1021 | if (error) | |
1022 | return error; | |
1023 | ||
1024 | error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION, | |
1025 | FORCE_CALIBRATION_ON); | |
1026 | if (error) | |
1027 | return error; | |
1028 | ||
1029 | /* Clear all interrupts */ | |
1030 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
1031 | if (error) | |
1032 | return error; | |
1033 | ||
1034 | /* Enable coordinates update interrupt */ | |
1035 | error = i2c_smbus_write_byte_data(client, INT_MASK, | |
1036 | CALIBRATION_DONE | SLEEP_OUT | | |
1037 | SLEEP_IN | PROGRAM_LOAD_DONE); | |
1038 | if (error) | |
1039 | return error; | |
1040 | ||
1041 | error = i2c_smbus_write_byte_data(client, ERR_MASK, | |
1042 | PROGRAM_LOAD_ERR | CPU_TIMEOUT | | |
1043 | ADC_TIMEOUT); | |
1044 | if (error) | |
1045 | return error; | |
1046 | ||
1047 | /* controller CPU power on */ | |
1048 | error = i2c_smbus_write_byte_data(client, SYSTEM, | |
1049 | ANALOG_POWER_ON | CPU_POWER_ON); | |
1050 | ||
1051 | enable_irq(client->irq); | |
1052 | ||
1053 | return error; | |
1054 | } | |
1055 | ||
1056 | static int rohm_ts_power_off(struct i2c_client *client) | |
1057 | { | |
1058 | int error; | |
1059 | ||
1060 | error = i2c_smbus_write_byte_data(client, SYSTEM, | |
1061 | ANALOG_POWER_ON | CPU_POWER_OFF); | |
1062 | if (error) { | |
1063 | dev_err(&client->dev, | |
1064 | "failed to power off device CPU: %d\n", error); | |
1065 | return error; | |
1066 | } | |
1067 | ||
1068 | error = i2c_smbus_write_byte_data(client, SYSTEM, | |
1069 | ANALOG_POWER_OFF | CPU_POWER_OFF); | |
1070 | if (error) | |
1071 | dev_err(&client->dev, | |
1072 | "failed to power off the device: %d\n", error); | |
1073 | ||
1074 | return error; | |
1075 | } | |
1076 | ||
1077 | static int rohm_ts_open(struct input_dev *input_dev) | |
1078 | { | |
1079 | struct rohm_ts_data *ts = input_get_drvdata(input_dev); | |
1080 | struct i2c_client *client = ts->client; | |
1081 | int error; | |
1082 | ||
1083 | if (!ts->initialized) { | |
1084 | error = rohm_ts_device_init(client, ts->setup2); | |
1085 | if (error) { | |
1086 | dev_err(&client->dev, | |
1087 | "device initialization failed: %d\n", error); | |
1088 | return error; | |
1089 | } | |
1090 | ||
1091 | ts->initialized = true; | |
1092 | } | |
1093 | ||
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | static void rohm_ts_close(struct input_dev *input_dev) | |
1098 | { | |
1099 | struct rohm_ts_data *ts = input_get_drvdata(input_dev); | |
1100 | ||
1101 | rohm_ts_power_off(ts->client); | |
1102 | ||
1103 | ts->initialized = false; | |
1104 | } | |
1105 | ||
c7efd123 YY |
1106 | static int rohm_bu21023_i2c_probe(struct i2c_client *client, |
1107 | const struct i2c_device_id *id) | |
1108 | { | |
1109 | struct device *dev = &client->dev; | |
1110 | struct rohm_ts_data *ts; | |
1111 | struct input_dev *input; | |
1112 | int error; | |
1113 | ||
1114 | if (!client->irq) { | |
1115 | dev_err(dev, "IRQ is not assigned\n"); | |
1116 | return -EINVAL; | |
1117 | } | |
1118 | ||
1119 | if (!client->adapter->algo->master_xfer) { | |
1120 | dev_err(dev, "I2C level transfers not supported\n"); | |
1121 | return -EOPNOTSUPP; | |
1122 | } | |
1123 | ||
1124 | /* Turn off CPU just in case */ | |
1125 | error = rohm_ts_power_off(client); | |
1126 | if (error) | |
1127 | return error; | |
1128 | ||
1129 | ts = devm_kzalloc(dev, sizeof(struct rohm_ts_data), GFP_KERNEL); | |
1130 | if (!ts) | |
1131 | return -ENOMEM; | |
1132 | ||
1133 | ts->client = client; | |
1134 | ts->setup2 = MAF_1SAMPLE; | |
1135 | i2c_set_clientdata(client, ts); | |
1136 | ||
1137 | input = devm_input_allocate_device(dev); | |
1138 | if (!input) | |
1139 | return -ENOMEM; | |
1140 | ||
1141 | input->name = BU21023_NAME; | |
1142 | input->id.bustype = BUS_I2C; | |
1143 | input->open = rohm_ts_open; | |
1144 | input->close = rohm_ts_close; | |
1145 | ||
1146 | ts->input = input; | |
1147 | input_set_drvdata(input, ts); | |
1148 | ||
1149 | input_set_abs_params(input, ABS_MT_POSITION_X, | |
1150 | ROHM_TS_ABS_X_MIN, ROHM_TS_ABS_X_MAX, 0, 0); | |
1151 | input_set_abs_params(input, ABS_MT_POSITION_Y, | |
1152 | ROHM_TS_ABS_Y_MIN, ROHM_TS_ABS_Y_MAX, 0, 0); | |
1153 | ||
1154 | error = input_mt_init_slots(input, MAX_CONTACTS, | |
1155 | INPUT_MT_DIRECT | INPUT_MT_TRACK | | |
1156 | INPUT_MT_DROP_UNUSED); | |
1157 | if (error) { | |
1158 | dev_err(dev, "failed to multi touch slots initialization\n"); | |
1159 | return error; | |
1160 | } | |
1161 | ||
1162 | error = devm_request_threaded_irq(dev, client->irq, | |
1163 | NULL, rohm_ts_soft_irq, | |
1164 | IRQF_ONESHOT, client->name, ts); | |
1165 | if (error) { | |
1166 | dev_err(dev, "failed to request IRQ: %d\n", error); | |
1167 | return error; | |
1168 | } | |
1169 | ||
1170 | error = input_register_device(input); | |
1171 | if (error) { | |
1172 | dev_err(dev, "failed to register input device: %d\n", error); | |
1173 | return error; | |
1174 | } | |
1175 | ||
a71b8b5c | 1176 | error = devm_device_add_group(dev, &rohm_ts_attr_group); |
c7efd123 YY |
1177 | if (error) { |
1178 | dev_err(dev, "failed to create sysfs group: %d\n", error); | |
1179 | return error; | |
1180 | } | |
1181 | ||
c7efd123 YY |
1182 | return error; |
1183 | } | |
1184 | ||
1185 | static const struct i2c_device_id rohm_bu21023_i2c_id[] = { | |
1186 | { BU21023_NAME, 0 }, | |
1187 | { /* sentinel */ } | |
1188 | }; | |
1189 | MODULE_DEVICE_TABLE(i2c, rohm_bu21023_i2c_id); | |
1190 | ||
1191 | static struct i2c_driver rohm_bu21023_i2c_driver = { | |
1192 | .driver = { | |
1193 | .name = BU21023_NAME, | |
1194 | }, | |
1195 | .probe = rohm_bu21023_i2c_probe, | |
1196 | .id_table = rohm_bu21023_i2c_id, | |
1197 | }; | |
1198 | module_i2c_driver(rohm_bu21023_i2c_driver); | |
1199 | ||
1200 | MODULE_DESCRIPTION("ROHM BU21023/24 Touchscreen driver"); | |
1201 | MODULE_LICENSE("GPL v2"); | |
1202 | MODULE_AUTHOR("ROHM Co., Ltd."); |