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4780c8df NKG |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2010 | |
3 | * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson | |
4 | * License terms:GNU General Public License (GPL) version 2 | |
5 | */ | |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/delay.h> | |
9 | #include <linux/interrupt.h> | |
10 | #include <linux/i2c.h> | |
11 | #include <linux/workqueue.h> | |
12 | #include <linux/input.h> | |
13 | #include <linux/input/bu21013.h> | |
14 | #include <linux/slab.h> | |
81e78dea | 15 | #include <linux/regulator/consumer.h> |
4780c8df NKG |
16 | |
17 | #define PEN_DOWN_INTR 0 | |
18 | #define MAX_FINGERS 2 | |
19 | #define RESET_DELAY 30 | |
20 | #define PENUP_TIMEOUT (10) | |
21 | #define DELTA_MIN 16 | |
22 | #define MASK_BITS 0x03 | |
23 | #define SHIFT_8 8 | |
24 | #define SHIFT_2 2 | |
25 | #define LENGTH_OF_BUFFER 11 | |
26 | #define I2C_RETRY_COUNT 5 | |
27 | ||
28 | #define BU21013_SENSORS_BTN_0_7_REG 0x70 | |
29 | #define BU21013_SENSORS_BTN_8_15_REG 0x71 | |
30 | #define BU21013_SENSORS_BTN_16_23_REG 0x72 | |
31 | #define BU21013_X1_POS_MSB_REG 0x73 | |
32 | #define BU21013_X1_POS_LSB_REG 0x74 | |
33 | #define BU21013_Y1_POS_MSB_REG 0x75 | |
34 | #define BU21013_Y1_POS_LSB_REG 0x76 | |
35 | #define BU21013_X2_POS_MSB_REG 0x77 | |
36 | #define BU21013_X2_POS_LSB_REG 0x78 | |
37 | #define BU21013_Y2_POS_MSB_REG 0x79 | |
38 | #define BU21013_Y2_POS_LSB_REG 0x7A | |
39 | #define BU21013_INT_CLR_REG 0xE8 | |
40 | #define BU21013_INT_MODE_REG 0xE9 | |
41 | #define BU21013_GAIN_REG 0xEA | |
42 | #define BU21013_OFFSET_MODE_REG 0xEB | |
43 | #define BU21013_XY_EDGE_REG 0xEC | |
44 | #define BU21013_RESET_REG 0xED | |
45 | #define BU21013_CALIB_REG 0xEE | |
46 | #define BU21013_DONE_REG 0xEF | |
47 | #define BU21013_SENSOR_0_7_REG 0xF0 | |
48 | #define BU21013_SENSOR_8_15_REG 0xF1 | |
49 | #define BU21013_SENSOR_16_23_REG 0xF2 | |
50 | #define BU21013_POS_MODE1_REG 0xF3 | |
51 | #define BU21013_POS_MODE2_REG 0xF4 | |
52 | #define BU21013_CLK_MODE_REG 0xF5 | |
53 | #define BU21013_IDLE_REG 0xFA | |
54 | #define BU21013_FILTER_REG 0xFB | |
55 | #define BU21013_TH_ON_REG 0xFC | |
56 | #define BU21013_TH_OFF_REG 0xFD | |
57 | ||
58 | ||
59 | #define BU21013_RESET_ENABLE 0x01 | |
60 | ||
61 | #define BU21013_SENSORS_EN_0_7 0x3F | |
62 | #define BU21013_SENSORS_EN_8_15 0xFC | |
63 | #define BU21013_SENSORS_EN_16_23 0x1F | |
64 | ||
65 | #define BU21013_POS_MODE1_0 0x02 | |
66 | #define BU21013_POS_MODE1_1 0x04 | |
67 | #define BU21013_POS_MODE1_2 0x08 | |
68 | ||
69 | #define BU21013_POS_MODE2_ZERO 0x01 | |
70 | #define BU21013_POS_MODE2_AVG1 0x02 | |
71 | #define BU21013_POS_MODE2_AVG2 0x04 | |
72 | #define BU21013_POS_MODE2_EN_XY 0x08 | |
73 | #define BU21013_POS_MODE2_EN_RAW 0x10 | |
74 | #define BU21013_POS_MODE2_MULTI 0x80 | |
75 | ||
76 | #define BU21013_CLK_MODE_DIV 0x01 | |
77 | #define BU21013_CLK_MODE_EXT 0x02 | |
78 | #define BU21013_CLK_MODE_CALIB 0x80 | |
79 | ||
80 | #define BU21013_IDLET_0 0x01 | |
81 | #define BU21013_IDLET_1 0x02 | |
82 | #define BU21013_IDLET_2 0x04 | |
83 | #define BU21013_IDLET_3 0x08 | |
84 | #define BU21013_IDLE_INTERMIT_EN 0x10 | |
85 | ||
86 | #define BU21013_DELTA_0_6 0x7F | |
87 | #define BU21013_FILTER_EN 0x80 | |
88 | ||
89 | #define BU21013_INT_MODE_LEVEL 0x00 | |
90 | #define BU21013_INT_MODE_EDGE 0x01 | |
91 | ||
92 | #define BU21013_GAIN_0 0x01 | |
93 | #define BU21013_GAIN_1 0x02 | |
94 | #define BU21013_GAIN_2 0x04 | |
95 | ||
96 | #define BU21013_OFFSET_MODE_DEFAULT 0x00 | |
97 | #define BU21013_OFFSET_MODE_MOVE 0x01 | |
98 | #define BU21013_OFFSET_MODE_DISABLE 0x02 | |
99 | ||
100 | #define BU21013_TH_ON_0 0x01 | |
101 | #define BU21013_TH_ON_1 0x02 | |
102 | #define BU21013_TH_ON_2 0x04 | |
103 | #define BU21013_TH_ON_3 0x08 | |
104 | #define BU21013_TH_ON_4 0x10 | |
105 | #define BU21013_TH_ON_5 0x20 | |
106 | #define BU21013_TH_ON_6 0x40 | |
107 | #define BU21013_TH_ON_7 0x80 | |
108 | #define BU21013_TH_ON_MAX 0xFF | |
109 | ||
110 | #define BU21013_TH_OFF_0 0x01 | |
111 | #define BU21013_TH_OFF_1 0x02 | |
112 | #define BU21013_TH_OFF_2 0x04 | |
113 | #define BU21013_TH_OFF_3 0x08 | |
114 | #define BU21013_TH_OFF_4 0x10 | |
115 | #define BU21013_TH_OFF_5 0x20 | |
116 | #define BU21013_TH_OFF_6 0x40 | |
117 | #define BU21013_TH_OFF_7 0x80 | |
118 | #define BU21013_TH_OFF_MAX 0xFF | |
119 | ||
120 | #define BU21013_X_EDGE_0 0x01 | |
121 | #define BU21013_X_EDGE_1 0x02 | |
122 | #define BU21013_X_EDGE_2 0x04 | |
123 | #define BU21013_X_EDGE_3 0x08 | |
124 | #define BU21013_Y_EDGE_0 0x10 | |
125 | #define BU21013_Y_EDGE_1 0x20 | |
126 | #define BU21013_Y_EDGE_2 0x40 | |
127 | #define BU21013_Y_EDGE_3 0x80 | |
128 | ||
129 | #define BU21013_DONE 0x01 | |
130 | #define BU21013_NUMBER_OF_X_SENSORS (6) | |
131 | #define BU21013_NUMBER_OF_Y_SENSORS (11) | |
132 | ||
133 | #define DRIVER_TP "bu21013_tp" | |
134 | ||
135 | /** | |
136 | * struct bu21013_ts_data - touch panel data structure | |
137 | * @client: pointer to the i2c client | |
138 | * @wait: variable to wait_queue_head_t structure | |
139 | * @touch_stopped: touch stop flag | |
140 | * @chip: pointer to the touch panel controller | |
141 | * @in_dev: pointer to the input device structure | |
142 | * @intr_pin: interrupt pin value | |
81e78dea | 143 | * @regulator: pointer to the Regulator used for touch screen |
4780c8df NKG |
144 | * |
145 | * Touch panel device data structure | |
146 | */ | |
147 | struct bu21013_ts_data { | |
148 | struct i2c_client *client; | |
149 | wait_queue_head_t wait; | |
150 | bool touch_stopped; | |
151 | const struct bu21013_platform_device *chip; | |
152 | struct input_dev *in_dev; | |
153 | unsigned int intr_pin; | |
81e78dea | 154 | struct regulator *regulator; |
4780c8df NKG |
155 | }; |
156 | ||
157 | /** | |
158 | * bu21013_read_block_data(): read the touch co-ordinates | |
159 | * @data: bu21013_ts_data structure pointer | |
160 | * @buf: byte pointer | |
161 | * | |
162 | * Read the touch co-ordinates using i2c read block into buffer | |
163 | * and returns integer. | |
164 | */ | |
165 | static int bu21013_read_block_data(struct bu21013_ts_data *data, u8 *buf) | |
166 | { | |
167 | int ret, i; | |
168 | ||
169 | for (i = 0; i < I2C_RETRY_COUNT; i++) { | |
170 | ret = i2c_smbus_read_i2c_block_data | |
171 | (data->client, BU21013_SENSORS_BTN_0_7_REG, | |
172 | LENGTH_OF_BUFFER, buf); | |
173 | if (ret == LENGTH_OF_BUFFER) | |
174 | return 0; | |
175 | } | |
176 | return -EINVAL; | |
177 | } | |
178 | ||
179 | /** | |
180 | * bu21013_do_touch_report(): Get the touch co-ordinates | |
181 | * @data: bu21013_ts_data structure pointer | |
182 | * | |
183 | * Get the touch co-ordinates from touch sensor registers and writes | |
184 | * into device structure and returns integer. | |
185 | */ | |
186 | static int bu21013_do_touch_report(struct bu21013_ts_data *data) | |
187 | { | |
188 | u8 buf[LENGTH_OF_BUFFER]; | |
189 | unsigned int pos_x[2], pos_y[2]; | |
190 | bool has_x_sensors, has_y_sensors; | |
191 | int finger_down_count = 0; | |
192 | int i; | |
193 | ||
194 | if (data == NULL) | |
195 | return -EINVAL; | |
196 | ||
197 | if (bu21013_read_block_data(data, buf) < 0) | |
198 | return -EINVAL; | |
199 | ||
200 | has_x_sensors = hweight32(buf[0] & BU21013_SENSORS_EN_0_7); | |
201 | has_y_sensors = hweight32(((buf[1] & BU21013_SENSORS_EN_8_15) | | |
202 | ((buf[2] & BU21013_SENSORS_EN_16_23) << SHIFT_8)) >> SHIFT_2); | |
203 | if (!has_x_sensors || !has_y_sensors) | |
204 | return 0; | |
205 | ||
206 | for (i = 0; i < MAX_FINGERS; i++) { | |
207 | const u8 *p = &buf[4 * i + 3]; | |
208 | unsigned int x = p[0] << SHIFT_2 | (p[1] & MASK_BITS); | |
209 | unsigned int y = p[2] << SHIFT_2 | (p[3] & MASK_BITS); | |
210 | if (x == 0 || y == 0) | |
211 | continue; | |
212 | pos_x[finger_down_count] = x; | |
213 | pos_y[finger_down_count] = y; | |
214 | finger_down_count++; | |
215 | } | |
216 | ||
217 | if (finger_down_count) { | |
218 | if (finger_down_count == 2 && | |
219 | (abs(pos_x[0] - pos_x[1]) < DELTA_MIN || | |
220 | abs(pos_y[0] - pos_y[1]) < DELTA_MIN)) { | |
221 | return 0; | |
222 | } | |
223 | ||
224 | for (i = 0; i < finger_down_count; i++) { | |
225 | if (data->chip->x_flip) | |
226 | pos_x[i] = data->chip->touch_x_max - pos_x[i]; | |
227 | if (data->chip->y_flip) | |
228 | pos_y[i] = data->chip->touch_y_max - pos_y[i]; | |
229 | ||
230 | input_report_abs(data->in_dev, | |
231 | ABS_MT_POSITION_X, pos_x[i]); | |
232 | input_report_abs(data->in_dev, | |
233 | ABS_MT_POSITION_Y, pos_y[i]); | |
234 | input_mt_sync(data->in_dev); | |
235 | } | |
236 | } else | |
237 | input_mt_sync(data->in_dev); | |
238 | ||
239 | input_sync(data->in_dev); | |
240 | ||
241 | return 0; | |
242 | } | |
243 | /** | |
244 | * bu21013_gpio_irq() - gpio thread function for touch interrupt | |
245 | * @irq: irq value | |
246 | * @device_data: void pointer | |
247 | * | |
248 | * This gpio thread function for touch interrupt | |
249 | * and returns irqreturn_t. | |
250 | */ | |
251 | static irqreturn_t bu21013_gpio_irq(int irq, void *device_data) | |
252 | { | |
253 | struct bu21013_ts_data *data = device_data; | |
254 | struct i2c_client *i2c = data->client; | |
255 | int retval; | |
256 | ||
257 | do { | |
258 | retval = bu21013_do_touch_report(data); | |
259 | if (retval < 0) { | |
260 | dev_err(&i2c->dev, "bu21013_do_touch_report failed\n"); | |
261 | return IRQ_NONE; | |
262 | } | |
263 | ||
264 | data->intr_pin = data->chip->irq_read_val(); | |
265 | if (data->intr_pin == PEN_DOWN_INTR) | |
266 | wait_event_timeout(data->wait, data->touch_stopped, | |
267 | msecs_to_jiffies(2)); | |
268 | } while (!data->intr_pin && !data->touch_stopped); | |
269 | ||
270 | return IRQ_HANDLED; | |
271 | } | |
272 | ||
273 | /** | |
274 | * bu21013_init_chip() - power on sequence for the bu21013 controller | |
275 | * @data: device structure pointer | |
276 | * | |
277 | * This function is used to power on | |
278 | * the bu21013 controller and returns integer. | |
279 | */ | |
280 | static int bu21013_init_chip(struct bu21013_ts_data *data) | |
281 | { | |
282 | int retval; | |
283 | struct i2c_client *i2c = data->client; | |
284 | ||
285 | retval = i2c_smbus_write_byte_data(i2c, BU21013_RESET_REG, | |
286 | BU21013_RESET_ENABLE); | |
287 | if (retval < 0) { | |
288 | dev_err(&i2c->dev, "BU21013_RESET reg write failed\n"); | |
289 | return retval; | |
290 | } | |
291 | msleep(RESET_DELAY); | |
292 | ||
293 | retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_0_7_REG, | |
294 | BU21013_SENSORS_EN_0_7); | |
295 | if (retval < 0) { | |
296 | dev_err(&i2c->dev, "BU21013_SENSOR_0_7 reg write failed\n"); | |
297 | return retval; | |
298 | } | |
299 | ||
300 | retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_8_15_REG, | |
301 | BU21013_SENSORS_EN_8_15); | |
302 | if (retval < 0) { | |
303 | dev_err(&i2c->dev, "BU21013_SENSOR_8_15 reg write failed\n"); | |
304 | return retval; | |
305 | } | |
306 | ||
307 | retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_16_23_REG, | |
308 | BU21013_SENSORS_EN_16_23); | |
309 | if (retval < 0) { | |
310 | dev_err(&i2c->dev, "BU21013_SENSOR_16_23 reg write failed\n"); | |
311 | return retval; | |
312 | } | |
313 | ||
314 | retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE1_REG, | |
315 | (BU21013_POS_MODE1_0 | BU21013_POS_MODE1_1)); | |
316 | if (retval < 0) { | |
317 | dev_err(&i2c->dev, "BU21013_POS_MODE1 reg write failed\n"); | |
318 | return retval; | |
319 | } | |
320 | ||
321 | retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE2_REG, | |
322 | (BU21013_POS_MODE2_ZERO | BU21013_POS_MODE2_AVG1 | | |
323 | BU21013_POS_MODE2_AVG2 | BU21013_POS_MODE2_EN_RAW | | |
324 | BU21013_POS_MODE2_MULTI)); | |
325 | if (retval < 0) { | |
326 | dev_err(&i2c->dev, "BU21013_POS_MODE2 reg write failed\n"); | |
327 | return retval; | |
328 | } | |
329 | ||
330 | if (data->chip->ext_clk) | |
331 | retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG, | |
332 | (BU21013_CLK_MODE_EXT | BU21013_CLK_MODE_CALIB)); | |
333 | else | |
334 | retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG, | |
335 | (BU21013_CLK_MODE_DIV | BU21013_CLK_MODE_CALIB)); | |
336 | if (retval < 0) { | |
337 | dev_err(&i2c->dev, "BU21013_CLK_MODE reg write failed\n"); | |
338 | return retval; | |
339 | } | |
340 | ||
341 | retval = i2c_smbus_write_byte_data(i2c, BU21013_IDLE_REG, | |
342 | (BU21013_IDLET_0 | BU21013_IDLE_INTERMIT_EN)); | |
343 | if (retval < 0) { | |
344 | dev_err(&i2c->dev, "BU21013_IDLE reg write failed\n"); | |
345 | return retval; | |
346 | } | |
347 | ||
348 | retval = i2c_smbus_write_byte_data(i2c, BU21013_INT_MODE_REG, | |
349 | BU21013_INT_MODE_LEVEL); | |
350 | if (retval < 0) { | |
351 | dev_err(&i2c->dev, "BU21013_INT_MODE reg write failed\n"); | |
352 | return retval; | |
353 | } | |
354 | ||
355 | retval = i2c_smbus_write_byte_data(i2c, BU21013_FILTER_REG, | |
356 | (BU21013_DELTA_0_6 | | |
357 | BU21013_FILTER_EN)); | |
358 | if (retval < 0) { | |
359 | dev_err(&i2c->dev, "BU21013_FILTER reg write failed\n"); | |
360 | return retval; | |
361 | } | |
362 | ||
363 | retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_ON_REG, | |
364 | BU21013_TH_ON_5); | |
365 | if (retval < 0) { | |
366 | dev_err(&i2c->dev, "BU21013_TH_ON reg write failed\n"); | |
367 | return retval; | |
368 | } | |
369 | ||
370 | retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_OFF_REG, | |
ef11e701 | 371 | BU21013_TH_OFF_4 | BU21013_TH_OFF_3); |
4780c8df NKG |
372 | if (retval < 0) { |
373 | dev_err(&i2c->dev, "BU21013_TH_OFF reg write failed\n"); | |
374 | return retval; | |
375 | } | |
376 | ||
377 | retval = i2c_smbus_write_byte_data(i2c, BU21013_GAIN_REG, | |
378 | (BU21013_GAIN_0 | BU21013_GAIN_1)); | |
379 | if (retval < 0) { | |
380 | dev_err(&i2c->dev, "BU21013_GAIN reg write failed\n"); | |
381 | return retval; | |
382 | } | |
383 | ||
384 | retval = i2c_smbus_write_byte_data(i2c, BU21013_OFFSET_MODE_REG, | |
385 | BU21013_OFFSET_MODE_DEFAULT); | |
386 | if (retval < 0) { | |
387 | dev_err(&i2c->dev, "BU21013_OFFSET_MODE reg write failed\n"); | |
388 | return retval; | |
389 | } | |
390 | ||
391 | retval = i2c_smbus_write_byte_data(i2c, BU21013_XY_EDGE_REG, | |
392 | (BU21013_X_EDGE_0 | BU21013_X_EDGE_2 | | |
393 | BU21013_Y_EDGE_1 | BU21013_Y_EDGE_3)); | |
394 | if (retval < 0) { | |
395 | dev_err(&i2c->dev, "BU21013_XY_EDGE reg write failed\n"); | |
396 | return retval; | |
397 | } | |
398 | ||
399 | retval = i2c_smbus_write_byte_data(i2c, BU21013_DONE_REG, | |
400 | BU21013_DONE); | |
401 | if (retval < 0) { | |
402 | dev_err(&i2c->dev, "BU21013_REG_DONE reg write failed\n"); | |
403 | return retval; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | /** | |
410 | * bu21013_free_irq() - frees IRQ registered for touchscreen | |
411 | * @bu21013_data: device structure pointer | |
412 | * | |
413 | * This function signals interrupt thread to stop processing and | |
414 | * frees interrupt. | |
415 | */ | |
416 | static void bu21013_free_irq(struct bu21013_ts_data *bu21013_data) | |
417 | { | |
418 | bu21013_data->touch_stopped = true; | |
419 | wake_up(&bu21013_data->wait); | |
420 | free_irq(bu21013_data->chip->irq, bu21013_data); | |
421 | } | |
422 | ||
423 | /** | |
424 | * bu21013_probe() - initializes the i2c-client touchscreen driver | |
425 | * @client: i2c client structure pointer | |
426 | * @id: i2c device id pointer | |
427 | * | |
428 | * This function used to initializes the i2c-client touchscreen | |
429 | * driver and returns integer. | |
430 | */ | |
431 | static int __devinit bu21013_probe(struct i2c_client *client, | |
432 | const struct i2c_device_id *id) | |
433 | { | |
434 | struct bu21013_ts_data *bu21013_data; | |
435 | struct input_dev *in_dev; | |
436 | const struct bu21013_platform_device *pdata = | |
437 | client->dev.platform_data; | |
438 | int error; | |
439 | ||
440 | if (!i2c_check_functionality(client->adapter, | |
441 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
442 | dev_err(&client->dev, "i2c smbus byte data not supported\n"); | |
443 | return -EIO; | |
444 | } | |
445 | ||
446 | if (!pdata) { | |
447 | dev_err(&client->dev, "platform data not defined\n"); | |
448 | return -EINVAL; | |
449 | } | |
450 | ||
451 | bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL); | |
452 | in_dev = input_allocate_device(); | |
453 | if (!bu21013_data || !in_dev) { | |
454 | dev_err(&client->dev, "device memory alloc failed\n"); | |
455 | error = -ENOMEM; | |
456 | goto err_free_mem; | |
457 | } | |
458 | ||
459 | bu21013_data->in_dev = in_dev; | |
460 | bu21013_data->chip = pdata; | |
461 | bu21013_data->client = client; | |
81e78dea NKG |
462 | |
463 | bu21013_data->regulator = regulator_get(&client->dev, "V-TOUCH"); | |
464 | if (IS_ERR(bu21013_data->regulator)) { | |
465 | dev_err(&client->dev, "regulator_get failed\n"); | |
466 | error = PTR_ERR(bu21013_data->regulator); | |
467 | goto err_free_mem; | |
468 | } | |
469 | ||
470 | error = regulator_enable(bu21013_data->regulator); | |
471 | if (error < 0) { | |
472 | dev_err(&client->dev, "regulator enable failed\n"); | |
473 | goto err_put_regulator; | |
474 | } | |
475 | ||
4780c8df NKG |
476 | bu21013_data->touch_stopped = false; |
477 | init_waitqueue_head(&bu21013_data->wait); | |
478 | ||
479 | /* configure the gpio pins */ | |
480 | if (pdata->cs_en) { | |
481 | error = pdata->cs_en(pdata->cs_pin); | |
482 | if (error < 0) { | |
483 | dev_err(&client->dev, "chip init failed\n"); | |
81e78dea | 484 | goto err_disable_regulator; |
4780c8df NKG |
485 | } |
486 | } | |
487 | ||
488 | /* configure the touch panel controller */ | |
489 | error = bu21013_init_chip(bu21013_data); | |
490 | if (error) { | |
491 | dev_err(&client->dev, "error in bu21013 config\n"); | |
492 | goto err_cs_disable; | |
493 | } | |
494 | ||
495 | /* register the device to input subsystem */ | |
496 | in_dev->name = DRIVER_TP; | |
497 | in_dev->id.bustype = BUS_I2C; | |
498 | in_dev->dev.parent = &client->dev; | |
499 | ||
500 | __set_bit(EV_SYN, in_dev->evbit); | |
501 | __set_bit(EV_KEY, in_dev->evbit); | |
502 | __set_bit(EV_ABS, in_dev->evbit); | |
503 | ||
504 | input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0, | |
d2763b4f | 505 | pdata->touch_x_max, 0, 0); |
4780c8df | 506 | input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0, |
d2763b4f | 507 | pdata->touch_y_max, 0, 0); |
4780c8df NKG |
508 | input_set_drvdata(in_dev, bu21013_data); |
509 | ||
510 | error = request_threaded_irq(pdata->irq, NULL, bu21013_gpio_irq, | |
511 | IRQF_TRIGGER_FALLING | IRQF_SHARED, | |
512 | DRIVER_TP, bu21013_data); | |
513 | if (error) { | |
514 | dev_err(&client->dev, "request irq %d failed\n", pdata->irq); | |
515 | goto err_cs_disable; | |
516 | } | |
517 | ||
518 | error = input_register_device(in_dev); | |
519 | if (error) { | |
520 | dev_err(&client->dev, "failed to register input device\n"); | |
521 | goto err_free_irq; | |
522 | } | |
523 | ||
524 | device_init_wakeup(&client->dev, pdata->wakeup); | |
525 | i2c_set_clientdata(client, bu21013_data); | |
526 | ||
527 | return 0; | |
528 | ||
529 | err_free_irq: | |
530 | bu21013_free_irq(bu21013_data); | |
531 | err_cs_disable: | |
532 | pdata->cs_dis(pdata->cs_pin); | |
81e78dea NKG |
533 | err_disable_regulator: |
534 | regulator_disable(bu21013_data->regulator); | |
535 | err_put_regulator: | |
536 | regulator_put(bu21013_data->regulator); | |
4780c8df | 537 | err_free_mem: |
bac64d0f | 538 | input_free_device(in_dev); |
4780c8df NKG |
539 | kfree(bu21013_data); |
540 | ||
541 | return error; | |
542 | } | |
543 | /** | |
544 | * bu21013_remove() - removes the i2c-client touchscreen driver | |
545 | * @client: i2c client structure pointer | |
546 | * | |
547 | * This function uses to remove the i2c-client | |
548 | * touchscreen driver and returns integer. | |
549 | */ | |
550 | static int __devexit bu21013_remove(struct i2c_client *client) | |
551 | { | |
552 | struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client); | |
553 | ||
554 | bu21013_free_irq(bu21013_data); | |
555 | ||
556 | bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin); | |
557 | ||
558 | input_unregister_device(bu21013_data->in_dev); | |
81e78dea NKG |
559 | |
560 | regulator_disable(bu21013_data->regulator); | |
561 | regulator_put(bu21013_data->regulator); | |
562 | ||
4780c8df NKG |
563 | kfree(bu21013_data); |
564 | ||
565 | device_init_wakeup(&client->dev, false); | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | #ifdef CONFIG_PM | |
571 | /** | |
572 | * bu21013_suspend() - suspend the touch screen controller | |
573 | * @dev: pointer to device structure | |
574 | * | |
575 | * This function is used to suspend the | |
576 | * touch panel controller and returns integer | |
577 | */ | |
578 | static int bu21013_suspend(struct device *dev) | |
579 | { | |
580 | struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev); | |
581 | struct i2c_client *client = bu21013_data->client; | |
582 | ||
583 | bu21013_data->touch_stopped = true; | |
584 | if (device_may_wakeup(&client->dev)) | |
585 | enable_irq_wake(bu21013_data->chip->irq); | |
586 | else | |
587 | disable_irq(bu21013_data->chip->irq); | |
588 | ||
81e78dea NKG |
589 | regulator_disable(bu21013_data->regulator); |
590 | ||
4780c8df NKG |
591 | return 0; |
592 | } | |
593 | ||
594 | /** | |
595 | * bu21013_resume() - resume the touch screen controller | |
596 | * @dev: pointer to device structure | |
597 | * | |
598 | * This function is used to resume the touch panel | |
599 | * controller and returns integer. | |
600 | */ | |
601 | static int bu21013_resume(struct device *dev) | |
602 | { | |
603 | struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev); | |
604 | struct i2c_client *client = bu21013_data->client; | |
605 | int retval; | |
606 | ||
81e78dea NKG |
607 | retval = regulator_enable(bu21013_data->regulator); |
608 | if (retval < 0) { | |
609 | dev_err(&client->dev, "bu21013 regulator enable failed\n"); | |
610 | return retval; | |
611 | } | |
612 | ||
4780c8df NKG |
613 | retval = bu21013_init_chip(bu21013_data); |
614 | if (retval < 0) { | |
615 | dev_err(&client->dev, "bu21013 controller config failed\n"); | |
616 | return retval; | |
617 | } | |
618 | ||
619 | bu21013_data->touch_stopped = false; | |
620 | ||
621 | if (device_may_wakeup(&client->dev)) | |
622 | disable_irq_wake(bu21013_data->chip->irq); | |
623 | else | |
624 | enable_irq(bu21013_data->chip->irq); | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
629 | static const struct dev_pm_ops bu21013_dev_pm_ops = { | |
630 | .suspend = bu21013_suspend, | |
631 | .resume = bu21013_resume, | |
632 | }; | |
633 | #endif | |
634 | ||
635 | static const struct i2c_device_id bu21013_id[] = { | |
636 | { DRIVER_TP, 0 }, | |
637 | { } | |
638 | }; | |
639 | MODULE_DEVICE_TABLE(i2c, bu21013_id); | |
640 | ||
641 | static struct i2c_driver bu21013_driver = { | |
642 | .driver = { | |
643 | .name = DRIVER_TP, | |
644 | .owner = THIS_MODULE, | |
645 | #ifdef CONFIG_PM | |
646 | .pm = &bu21013_dev_pm_ops, | |
647 | #endif | |
648 | }, | |
649 | .probe = bu21013_probe, | |
650 | .remove = __devexit_p(bu21013_remove), | |
651 | .id_table = bu21013_id, | |
652 | }; | |
653 | ||
654 | /** | |
655 | * bu21013_init() - initializes the bu21013 touchscreen driver | |
656 | * | |
657 | * This function used to initializes the bu21013 | |
658 | * touchscreen driver and returns integer. | |
659 | */ | |
660 | static int __init bu21013_init(void) | |
661 | { | |
662 | return i2c_add_driver(&bu21013_driver); | |
663 | } | |
664 | ||
665 | /** | |
666 | * bu21013_exit() - de-initializes the bu21013 touchscreen driver | |
667 | * | |
668 | * This function uses to de-initializes the bu21013 | |
669 | * touchscreen driver and returns none. | |
670 | */ | |
671 | static void __exit bu21013_exit(void) | |
672 | { | |
673 | i2c_del_driver(&bu21013_driver); | |
674 | } | |
675 | ||
676 | module_init(bu21013_init); | |
677 | module_exit(bu21013_exit); | |
678 | ||
679 | MODULE_LICENSE("GPL v2"); | |
680 | MODULE_AUTHOR("Naveen Kumar G <naveen.gaddipati@stericsson.com>"); | |
681 | MODULE_DESCRIPTION("bu21013 touch screen controller driver"); |