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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> |
d2d8442d | 16 | #include <linux/module.h> |
4780c8df NKG |
17 | |
18 | #define PEN_DOWN_INTR 0 | |
19 | #define MAX_FINGERS 2 | |
20 | #define RESET_DELAY 30 | |
21 | #define PENUP_TIMEOUT (10) | |
22 | #define DELTA_MIN 16 | |
23 | #define MASK_BITS 0x03 | |
24 | #define SHIFT_8 8 | |
25 | #define SHIFT_2 2 | |
26 | #define LENGTH_OF_BUFFER 11 | |
27 | #define I2C_RETRY_COUNT 5 | |
28 | ||
29 | #define BU21013_SENSORS_BTN_0_7_REG 0x70 | |
30 | #define BU21013_SENSORS_BTN_8_15_REG 0x71 | |
31 | #define BU21013_SENSORS_BTN_16_23_REG 0x72 | |
32 | #define BU21013_X1_POS_MSB_REG 0x73 | |
33 | #define BU21013_X1_POS_LSB_REG 0x74 | |
34 | #define BU21013_Y1_POS_MSB_REG 0x75 | |
35 | #define BU21013_Y1_POS_LSB_REG 0x76 | |
36 | #define BU21013_X2_POS_MSB_REG 0x77 | |
37 | #define BU21013_X2_POS_LSB_REG 0x78 | |
38 | #define BU21013_Y2_POS_MSB_REG 0x79 | |
39 | #define BU21013_Y2_POS_LSB_REG 0x7A | |
40 | #define BU21013_INT_CLR_REG 0xE8 | |
41 | #define BU21013_INT_MODE_REG 0xE9 | |
42 | #define BU21013_GAIN_REG 0xEA | |
43 | #define BU21013_OFFSET_MODE_REG 0xEB | |
44 | #define BU21013_XY_EDGE_REG 0xEC | |
45 | #define BU21013_RESET_REG 0xED | |
46 | #define BU21013_CALIB_REG 0xEE | |
47 | #define BU21013_DONE_REG 0xEF | |
48 | #define BU21013_SENSOR_0_7_REG 0xF0 | |
49 | #define BU21013_SENSOR_8_15_REG 0xF1 | |
50 | #define BU21013_SENSOR_16_23_REG 0xF2 | |
51 | #define BU21013_POS_MODE1_REG 0xF3 | |
52 | #define BU21013_POS_MODE2_REG 0xF4 | |
53 | #define BU21013_CLK_MODE_REG 0xF5 | |
54 | #define BU21013_IDLE_REG 0xFA | |
55 | #define BU21013_FILTER_REG 0xFB | |
56 | #define BU21013_TH_ON_REG 0xFC | |
57 | #define BU21013_TH_OFF_REG 0xFD | |
58 | ||
59 | ||
60 | #define BU21013_RESET_ENABLE 0x01 | |
61 | ||
62 | #define BU21013_SENSORS_EN_0_7 0x3F | |
63 | #define BU21013_SENSORS_EN_8_15 0xFC | |
64 | #define BU21013_SENSORS_EN_16_23 0x1F | |
65 | ||
66 | #define BU21013_POS_MODE1_0 0x02 | |
67 | #define BU21013_POS_MODE1_1 0x04 | |
68 | #define BU21013_POS_MODE1_2 0x08 | |
69 | ||
70 | #define BU21013_POS_MODE2_ZERO 0x01 | |
71 | #define BU21013_POS_MODE2_AVG1 0x02 | |
72 | #define BU21013_POS_MODE2_AVG2 0x04 | |
73 | #define BU21013_POS_MODE2_EN_XY 0x08 | |
74 | #define BU21013_POS_MODE2_EN_RAW 0x10 | |
75 | #define BU21013_POS_MODE2_MULTI 0x80 | |
76 | ||
77 | #define BU21013_CLK_MODE_DIV 0x01 | |
78 | #define BU21013_CLK_MODE_EXT 0x02 | |
79 | #define BU21013_CLK_MODE_CALIB 0x80 | |
80 | ||
81 | #define BU21013_IDLET_0 0x01 | |
82 | #define BU21013_IDLET_1 0x02 | |
83 | #define BU21013_IDLET_2 0x04 | |
84 | #define BU21013_IDLET_3 0x08 | |
85 | #define BU21013_IDLE_INTERMIT_EN 0x10 | |
86 | ||
87 | #define BU21013_DELTA_0_6 0x7F | |
88 | #define BU21013_FILTER_EN 0x80 | |
89 | ||
90 | #define BU21013_INT_MODE_LEVEL 0x00 | |
91 | #define BU21013_INT_MODE_EDGE 0x01 | |
92 | ||
93 | #define BU21013_GAIN_0 0x01 | |
94 | #define BU21013_GAIN_1 0x02 | |
95 | #define BU21013_GAIN_2 0x04 | |
96 | ||
97 | #define BU21013_OFFSET_MODE_DEFAULT 0x00 | |
98 | #define BU21013_OFFSET_MODE_MOVE 0x01 | |
99 | #define BU21013_OFFSET_MODE_DISABLE 0x02 | |
100 | ||
101 | #define BU21013_TH_ON_0 0x01 | |
102 | #define BU21013_TH_ON_1 0x02 | |
103 | #define BU21013_TH_ON_2 0x04 | |
104 | #define BU21013_TH_ON_3 0x08 | |
105 | #define BU21013_TH_ON_4 0x10 | |
106 | #define BU21013_TH_ON_5 0x20 | |
107 | #define BU21013_TH_ON_6 0x40 | |
108 | #define BU21013_TH_ON_7 0x80 | |
109 | #define BU21013_TH_ON_MAX 0xFF | |
110 | ||
111 | #define BU21013_TH_OFF_0 0x01 | |
112 | #define BU21013_TH_OFF_1 0x02 | |
113 | #define BU21013_TH_OFF_2 0x04 | |
114 | #define BU21013_TH_OFF_3 0x08 | |
115 | #define BU21013_TH_OFF_4 0x10 | |
116 | #define BU21013_TH_OFF_5 0x20 | |
117 | #define BU21013_TH_OFF_6 0x40 | |
118 | #define BU21013_TH_OFF_7 0x80 | |
119 | #define BU21013_TH_OFF_MAX 0xFF | |
120 | ||
121 | #define BU21013_X_EDGE_0 0x01 | |
122 | #define BU21013_X_EDGE_1 0x02 | |
123 | #define BU21013_X_EDGE_2 0x04 | |
124 | #define BU21013_X_EDGE_3 0x08 | |
125 | #define BU21013_Y_EDGE_0 0x10 | |
126 | #define BU21013_Y_EDGE_1 0x20 | |
127 | #define BU21013_Y_EDGE_2 0x40 | |
128 | #define BU21013_Y_EDGE_3 0x80 | |
129 | ||
130 | #define BU21013_DONE 0x01 | |
131 | #define BU21013_NUMBER_OF_X_SENSORS (6) | |
132 | #define BU21013_NUMBER_OF_Y_SENSORS (11) | |
133 | ||
134 | #define DRIVER_TP "bu21013_tp" | |
135 | ||
136 | /** | |
137 | * struct bu21013_ts_data - touch panel data structure | |
138 | * @client: pointer to the i2c client | |
139 | * @wait: variable to wait_queue_head_t structure | |
140 | * @touch_stopped: touch stop flag | |
141 | * @chip: pointer to the touch panel controller | |
142 | * @in_dev: pointer to the input device structure | |
143 | * @intr_pin: interrupt pin value | |
81e78dea | 144 | * @regulator: pointer to the Regulator used for touch screen |
4780c8df NKG |
145 | * |
146 | * Touch panel device data structure | |
147 | */ | |
148 | struct bu21013_ts_data { | |
149 | struct i2c_client *client; | |
150 | wait_queue_head_t wait; | |
151 | bool touch_stopped; | |
152 | const struct bu21013_platform_device *chip; | |
153 | struct input_dev *in_dev; | |
154 | unsigned int intr_pin; | |
81e78dea | 155 | struct regulator *regulator; |
4780c8df NKG |
156 | }; |
157 | ||
158 | /** | |
159 | * bu21013_read_block_data(): read the touch co-ordinates | |
160 | * @data: bu21013_ts_data structure pointer | |
161 | * @buf: byte pointer | |
162 | * | |
163 | * Read the touch co-ordinates using i2c read block into buffer | |
164 | * and returns integer. | |
165 | */ | |
166 | static int bu21013_read_block_data(struct bu21013_ts_data *data, u8 *buf) | |
167 | { | |
168 | int ret, i; | |
169 | ||
170 | for (i = 0; i < I2C_RETRY_COUNT; i++) { | |
171 | ret = i2c_smbus_read_i2c_block_data | |
172 | (data->client, BU21013_SENSORS_BTN_0_7_REG, | |
173 | LENGTH_OF_BUFFER, buf); | |
174 | if (ret == LENGTH_OF_BUFFER) | |
175 | return 0; | |
176 | } | |
177 | return -EINVAL; | |
178 | } | |
179 | ||
180 | /** | |
181 | * bu21013_do_touch_report(): Get the touch co-ordinates | |
182 | * @data: bu21013_ts_data structure pointer | |
183 | * | |
184 | * Get the touch co-ordinates from touch sensor registers and writes | |
185 | * into device structure and returns integer. | |
186 | */ | |
187 | static int bu21013_do_touch_report(struct bu21013_ts_data *data) | |
188 | { | |
189 | u8 buf[LENGTH_OF_BUFFER]; | |
190 | unsigned int pos_x[2], pos_y[2]; | |
191 | bool has_x_sensors, has_y_sensors; | |
192 | int finger_down_count = 0; | |
193 | int i; | |
194 | ||
195 | if (data == NULL) | |
196 | return -EINVAL; | |
197 | ||
198 | if (bu21013_read_block_data(data, buf) < 0) | |
199 | return -EINVAL; | |
200 | ||
201 | has_x_sensors = hweight32(buf[0] & BU21013_SENSORS_EN_0_7); | |
202 | has_y_sensors = hweight32(((buf[1] & BU21013_SENSORS_EN_8_15) | | |
203 | ((buf[2] & BU21013_SENSORS_EN_16_23) << SHIFT_8)) >> SHIFT_2); | |
204 | if (!has_x_sensors || !has_y_sensors) | |
205 | return 0; | |
206 | ||
207 | for (i = 0; i < MAX_FINGERS; i++) { | |
208 | const u8 *p = &buf[4 * i + 3]; | |
209 | unsigned int x = p[0] << SHIFT_2 | (p[1] & MASK_BITS); | |
210 | unsigned int y = p[2] << SHIFT_2 | (p[3] & MASK_BITS); | |
211 | if (x == 0 || y == 0) | |
212 | continue; | |
213 | pos_x[finger_down_count] = x; | |
214 | pos_y[finger_down_count] = y; | |
215 | finger_down_count++; | |
216 | } | |
217 | ||
218 | if (finger_down_count) { | |
219 | if (finger_down_count == 2 && | |
220 | (abs(pos_x[0] - pos_x[1]) < DELTA_MIN || | |
221 | abs(pos_y[0] - pos_y[1]) < DELTA_MIN)) { | |
222 | return 0; | |
223 | } | |
224 | ||
225 | for (i = 0; i < finger_down_count; i++) { | |
226 | if (data->chip->x_flip) | |
227 | pos_x[i] = data->chip->touch_x_max - pos_x[i]; | |
228 | if (data->chip->y_flip) | |
229 | pos_y[i] = data->chip->touch_y_max - pos_y[i]; | |
230 | ||
231 | input_report_abs(data->in_dev, | |
232 | ABS_MT_POSITION_X, pos_x[i]); | |
233 | input_report_abs(data->in_dev, | |
234 | ABS_MT_POSITION_Y, pos_y[i]); | |
235 | input_mt_sync(data->in_dev); | |
236 | } | |
237 | } else | |
238 | input_mt_sync(data->in_dev); | |
239 | ||
240 | input_sync(data->in_dev); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | /** | |
245 | * bu21013_gpio_irq() - gpio thread function for touch interrupt | |
246 | * @irq: irq value | |
247 | * @device_data: void pointer | |
248 | * | |
249 | * This gpio thread function for touch interrupt | |
250 | * and returns irqreturn_t. | |
251 | */ | |
252 | static irqreturn_t bu21013_gpio_irq(int irq, void *device_data) | |
253 | { | |
254 | struct bu21013_ts_data *data = device_data; | |
255 | struct i2c_client *i2c = data->client; | |
256 | int retval; | |
257 | ||
258 | do { | |
259 | retval = bu21013_do_touch_report(data); | |
260 | if (retval < 0) { | |
261 | dev_err(&i2c->dev, "bu21013_do_touch_report failed\n"); | |
262 | return IRQ_NONE; | |
263 | } | |
264 | ||
265 | data->intr_pin = data->chip->irq_read_val(); | |
266 | if (data->intr_pin == PEN_DOWN_INTR) | |
267 | wait_event_timeout(data->wait, data->touch_stopped, | |
268 | msecs_to_jiffies(2)); | |
269 | } while (!data->intr_pin && !data->touch_stopped); | |
270 | ||
271 | return IRQ_HANDLED; | |
272 | } | |
273 | ||
274 | /** | |
275 | * bu21013_init_chip() - power on sequence for the bu21013 controller | |
276 | * @data: device structure pointer | |
277 | * | |
278 | * This function is used to power on | |
279 | * the bu21013 controller and returns integer. | |
280 | */ | |
281 | static int bu21013_init_chip(struct bu21013_ts_data *data) | |
282 | { | |
283 | int retval; | |
284 | struct i2c_client *i2c = data->client; | |
285 | ||
286 | retval = i2c_smbus_write_byte_data(i2c, BU21013_RESET_REG, | |
287 | BU21013_RESET_ENABLE); | |
288 | if (retval < 0) { | |
289 | dev_err(&i2c->dev, "BU21013_RESET reg write failed\n"); | |
290 | return retval; | |
291 | } | |
292 | msleep(RESET_DELAY); | |
293 | ||
294 | retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_0_7_REG, | |
295 | BU21013_SENSORS_EN_0_7); | |
296 | if (retval < 0) { | |
297 | dev_err(&i2c->dev, "BU21013_SENSOR_0_7 reg write failed\n"); | |
298 | return retval; | |
299 | } | |
300 | ||
301 | retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_8_15_REG, | |
302 | BU21013_SENSORS_EN_8_15); | |
303 | if (retval < 0) { | |
304 | dev_err(&i2c->dev, "BU21013_SENSOR_8_15 reg write failed\n"); | |
305 | return retval; | |
306 | } | |
307 | ||
308 | retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_16_23_REG, | |
309 | BU21013_SENSORS_EN_16_23); | |
310 | if (retval < 0) { | |
311 | dev_err(&i2c->dev, "BU21013_SENSOR_16_23 reg write failed\n"); | |
312 | return retval; | |
313 | } | |
314 | ||
315 | retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE1_REG, | |
316 | (BU21013_POS_MODE1_0 | BU21013_POS_MODE1_1)); | |
317 | if (retval < 0) { | |
318 | dev_err(&i2c->dev, "BU21013_POS_MODE1 reg write failed\n"); | |
319 | return retval; | |
320 | } | |
321 | ||
322 | retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE2_REG, | |
323 | (BU21013_POS_MODE2_ZERO | BU21013_POS_MODE2_AVG1 | | |
324 | BU21013_POS_MODE2_AVG2 | BU21013_POS_MODE2_EN_RAW | | |
325 | BU21013_POS_MODE2_MULTI)); | |
326 | if (retval < 0) { | |
327 | dev_err(&i2c->dev, "BU21013_POS_MODE2 reg write failed\n"); | |
328 | return retval; | |
329 | } | |
330 | ||
331 | if (data->chip->ext_clk) | |
332 | retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG, | |
333 | (BU21013_CLK_MODE_EXT | BU21013_CLK_MODE_CALIB)); | |
334 | else | |
335 | retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG, | |
336 | (BU21013_CLK_MODE_DIV | BU21013_CLK_MODE_CALIB)); | |
337 | if (retval < 0) { | |
338 | dev_err(&i2c->dev, "BU21013_CLK_MODE reg write failed\n"); | |
339 | return retval; | |
340 | } | |
341 | ||
342 | retval = i2c_smbus_write_byte_data(i2c, BU21013_IDLE_REG, | |
343 | (BU21013_IDLET_0 | BU21013_IDLE_INTERMIT_EN)); | |
344 | if (retval < 0) { | |
345 | dev_err(&i2c->dev, "BU21013_IDLE reg write failed\n"); | |
346 | return retval; | |
347 | } | |
348 | ||
349 | retval = i2c_smbus_write_byte_data(i2c, BU21013_INT_MODE_REG, | |
350 | BU21013_INT_MODE_LEVEL); | |
351 | if (retval < 0) { | |
352 | dev_err(&i2c->dev, "BU21013_INT_MODE reg write failed\n"); | |
353 | return retval; | |
354 | } | |
355 | ||
356 | retval = i2c_smbus_write_byte_data(i2c, BU21013_FILTER_REG, | |
357 | (BU21013_DELTA_0_6 | | |
358 | BU21013_FILTER_EN)); | |
359 | if (retval < 0) { | |
360 | dev_err(&i2c->dev, "BU21013_FILTER reg write failed\n"); | |
361 | return retval; | |
362 | } | |
363 | ||
364 | retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_ON_REG, | |
365 | BU21013_TH_ON_5); | |
366 | if (retval < 0) { | |
367 | dev_err(&i2c->dev, "BU21013_TH_ON reg write failed\n"); | |
368 | return retval; | |
369 | } | |
370 | ||
371 | retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_OFF_REG, | |
ef11e701 | 372 | BU21013_TH_OFF_4 | BU21013_TH_OFF_3); |
4780c8df NKG |
373 | if (retval < 0) { |
374 | dev_err(&i2c->dev, "BU21013_TH_OFF reg write failed\n"); | |
375 | return retval; | |
376 | } | |
377 | ||
378 | retval = i2c_smbus_write_byte_data(i2c, BU21013_GAIN_REG, | |
379 | (BU21013_GAIN_0 | BU21013_GAIN_1)); | |
380 | if (retval < 0) { | |
381 | dev_err(&i2c->dev, "BU21013_GAIN reg write failed\n"); | |
382 | return retval; | |
383 | } | |
384 | ||
385 | retval = i2c_smbus_write_byte_data(i2c, BU21013_OFFSET_MODE_REG, | |
386 | BU21013_OFFSET_MODE_DEFAULT); | |
387 | if (retval < 0) { | |
388 | dev_err(&i2c->dev, "BU21013_OFFSET_MODE reg write failed\n"); | |
389 | return retval; | |
390 | } | |
391 | ||
392 | retval = i2c_smbus_write_byte_data(i2c, BU21013_XY_EDGE_REG, | |
393 | (BU21013_X_EDGE_0 | BU21013_X_EDGE_2 | | |
394 | BU21013_Y_EDGE_1 | BU21013_Y_EDGE_3)); | |
395 | if (retval < 0) { | |
396 | dev_err(&i2c->dev, "BU21013_XY_EDGE reg write failed\n"); | |
397 | return retval; | |
398 | } | |
399 | ||
400 | retval = i2c_smbus_write_byte_data(i2c, BU21013_DONE_REG, | |
401 | BU21013_DONE); | |
402 | if (retval < 0) { | |
403 | dev_err(&i2c->dev, "BU21013_REG_DONE reg write failed\n"); | |
404 | return retval; | |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | /** | |
411 | * bu21013_free_irq() - frees IRQ registered for touchscreen | |
412 | * @bu21013_data: device structure pointer | |
413 | * | |
414 | * This function signals interrupt thread to stop processing and | |
415 | * frees interrupt. | |
416 | */ | |
417 | static void bu21013_free_irq(struct bu21013_ts_data *bu21013_data) | |
418 | { | |
419 | bu21013_data->touch_stopped = true; | |
420 | wake_up(&bu21013_data->wait); | |
421 | free_irq(bu21013_data->chip->irq, bu21013_data); | |
422 | } | |
423 | ||
424 | /** | |
425 | * bu21013_probe() - initializes the i2c-client touchscreen driver | |
426 | * @client: i2c client structure pointer | |
427 | * @id: i2c device id pointer | |
428 | * | |
429 | * This function used to initializes the i2c-client touchscreen | |
430 | * driver and returns integer. | |
431 | */ | |
432 | static int __devinit bu21013_probe(struct i2c_client *client, | |
433 | const struct i2c_device_id *id) | |
434 | { | |
435 | struct bu21013_ts_data *bu21013_data; | |
436 | struct input_dev *in_dev; | |
437 | const struct bu21013_platform_device *pdata = | |
438 | client->dev.platform_data; | |
439 | int error; | |
440 | ||
441 | if (!i2c_check_functionality(client->adapter, | |
442 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
443 | dev_err(&client->dev, "i2c smbus byte data not supported\n"); | |
444 | return -EIO; | |
445 | } | |
446 | ||
447 | if (!pdata) { | |
448 | dev_err(&client->dev, "platform data not defined\n"); | |
449 | return -EINVAL; | |
450 | } | |
451 | ||
452 | bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL); | |
453 | in_dev = input_allocate_device(); | |
454 | if (!bu21013_data || !in_dev) { | |
455 | dev_err(&client->dev, "device memory alloc failed\n"); | |
456 | error = -ENOMEM; | |
457 | goto err_free_mem; | |
458 | } | |
459 | ||
460 | bu21013_data->in_dev = in_dev; | |
461 | bu21013_data->chip = pdata; | |
462 | bu21013_data->client = client; | |
81e78dea NKG |
463 | |
464 | bu21013_data->regulator = regulator_get(&client->dev, "V-TOUCH"); | |
465 | if (IS_ERR(bu21013_data->regulator)) { | |
466 | dev_err(&client->dev, "regulator_get failed\n"); | |
467 | error = PTR_ERR(bu21013_data->regulator); | |
468 | goto err_free_mem; | |
469 | } | |
470 | ||
471 | error = regulator_enable(bu21013_data->regulator); | |
472 | if (error < 0) { | |
473 | dev_err(&client->dev, "regulator enable failed\n"); | |
474 | goto err_put_regulator; | |
475 | } | |
476 | ||
4780c8df NKG |
477 | bu21013_data->touch_stopped = false; |
478 | init_waitqueue_head(&bu21013_data->wait); | |
479 | ||
480 | /* configure the gpio pins */ | |
481 | if (pdata->cs_en) { | |
482 | error = pdata->cs_en(pdata->cs_pin); | |
483 | if (error < 0) { | |
484 | dev_err(&client->dev, "chip init failed\n"); | |
81e78dea | 485 | goto err_disable_regulator; |
4780c8df NKG |
486 | } |
487 | } | |
488 | ||
489 | /* configure the touch panel controller */ | |
490 | error = bu21013_init_chip(bu21013_data); | |
491 | if (error) { | |
492 | dev_err(&client->dev, "error in bu21013 config\n"); | |
493 | goto err_cs_disable; | |
494 | } | |
495 | ||
496 | /* register the device to input subsystem */ | |
497 | in_dev->name = DRIVER_TP; | |
498 | in_dev->id.bustype = BUS_I2C; | |
499 | in_dev->dev.parent = &client->dev; | |
500 | ||
501 | __set_bit(EV_SYN, in_dev->evbit); | |
502 | __set_bit(EV_KEY, in_dev->evbit); | |
503 | __set_bit(EV_ABS, in_dev->evbit); | |
504 | ||
505 | input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0, | |
d2763b4f | 506 | pdata->touch_x_max, 0, 0); |
4780c8df | 507 | input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0, |
d2763b4f | 508 | pdata->touch_y_max, 0, 0); |
4780c8df NKG |
509 | input_set_drvdata(in_dev, bu21013_data); |
510 | ||
511 | error = request_threaded_irq(pdata->irq, NULL, bu21013_gpio_irq, | |
9b7e31bb LPC |
512 | IRQF_TRIGGER_FALLING | IRQF_SHARED | |
513 | IRQF_ONESHOT, | |
4780c8df NKG |
514 | DRIVER_TP, bu21013_data); |
515 | if (error) { | |
516 | dev_err(&client->dev, "request irq %d failed\n", pdata->irq); | |
517 | goto err_cs_disable; | |
518 | } | |
519 | ||
520 | error = input_register_device(in_dev); | |
521 | if (error) { | |
522 | dev_err(&client->dev, "failed to register input device\n"); | |
523 | goto err_free_irq; | |
524 | } | |
525 | ||
526 | device_init_wakeup(&client->dev, pdata->wakeup); | |
527 | i2c_set_clientdata(client, bu21013_data); | |
528 | ||
529 | return 0; | |
530 | ||
531 | err_free_irq: | |
532 | bu21013_free_irq(bu21013_data); | |
533 | err_cs_disable: | |
534 | pdata->cs_dis(pdata->cs_pin); | |
81e78dea NKG |
535 | err_disable_regulator: |
536 | regulator_disable(bu21013_data->regulator); | |
537 | err_put_regulator: | |
538 | regulator_put(bu21013_data->regulator); | |
4780c8df | 539 | err_free_mem: |
bac64d0f | 540 | input_free_device(in_dev); |
4780c8df NKG |
541 | kfree(bu21013_data); |
542 | ||
543 | return error; | |
544 | } | |
545 | /** | |
546 | * bu21013_remove() - removes the i2c-client touchscreen driver | |
547 | * @client: i2c client structure pointer | |
548 | * | |
549 | * This function uses to remove the i2c-client | |
550 | * touchscreen driver and returns integer. | |
551 | */ | |
552 | static int __devexit bu21013_remove(struct i2c_client *client) | |
553 | { | |
554 | struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client); | |
555 | ||
556 | bu21013_free_irq(bu21013_data); | |
557 | ||
558 | bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin); | |
559 | ||
560 | input_unregister_device(bu21013_data->in_dev); | |
81e78dea NKG |
561 | |
562 | regulator_disable(bu21013_data->regulator); | |
563 | regulator_put(bu21013_data->regulator); | |
564 | ||
4780c8df NKG |
565 | kfree(bu21013_data); |
566 | ||
567 | device_init_wakeup(&client->dev, false); | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | #ifdef CONFIG_PM | |
573 | /** | |
574 | * bu21013_suspend() - suspend the touch screen controller | |
575 | * @dev: pointer to device structure | |
576 | * | |
577 | * This function is used to suspend the | |
578 | * touch panel controller and returns integer | |
579 | */ | |
580 | static int bu21013_suspend(struct device *dev) | |
581 | { | |
582 | struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev); | |
583 | struct i2c_client *client = bu21013_data->client; | |
584 | ||
585 | bu21013_data->touch_stopped = true; | |
586 | if (device_may_wakeup(&client->dev)) | |
587 | enable_irq_wake(bu21013_data->chip->irq); | |
588 | else | |
589 | disable_irq(bu21013_data->chip->irq); | |
590 | ||
81e78dea NKG |
591 | regulator_disable(bu21013_data->regulator); |
592 | ||
4780c8df NKG |
593 | return 0; |
594 | } | |
595 | ||
596 | /** | |
597 | * bu21013_resume() - resume the touch screen controller | |
598 | * @dev: pointer to device structure | |
599 | * | |
600 | * This function is used to resume the touch panel | |
601 | * controller and returns integer. | |
602 | */ | |
603 | static int bu21013_resume(struct device *dev) | |
604 | { | |
605 | struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev); | |
606 | struct i2c_client *client = bu21013_data->client; | |
607 | int retval; | |
608 | ||
81e78dea NKG |
609 | retval = regulator_enable(bu21013_data->regulator); |
610 | if (retval < 0) { | |
611 | dev_err(&client->dev, "bu21013 regulator enable failed\n"); | |
612 | return retval; | |
613 | } | |
614 | ||
4780c8df NKG |
615 | retval = bu21013_init_chip(bu21013_data); |
616 | if (retval < 0) { | |
617 | dev_err(&client->dev, "bu21013 controller config failed\n"); | |
618 | return retval; | |
619 | } | |
620 | ||
621 | bu21013_data->touch_stopped = false; | |
622 | ||
623 | if (device_may_wakeup(&client->dev)) | |
624 | disable_irq_wake(bu21013_data->chip->irq); | |
625 | else | |
626 | enable_irq(bu21013_data->chip->irq); | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
631 | static const struct dev_pm_ops bu21013_dev_pm_ops = { | |
632 | .suspend = bu21013_suspend, | |
633 | .resume = bu21013_resume, | |
634 | }; | |
635 | #endif | |
636 | ||
637 | static const struct i2c_device_id bu21013_id[] = { | |
638 | { DRIVER_TP, 0 }, | |
639 | { } | |
640 | }; | |
641 | MODULE_DEVICE_TABLE(i2c, bu21013_id); | |
642 | ||
643 | static struct i2c_driver bu21013_driver = { | |
644 | .driver = { | |
645 | .name = DRIVER_TP, | |
646 | .owner = THIS_MODULE, | |
647 | #ifdef CONFIG_PM | |
648 | .pm = &bu21013_dev_pm_ops, | |
649 | #endif | |
650 | }, | |
651 | .probe = bu21013_probe, | |
652 | .remove = __devexit_p(bu21013_remove), | |
653 | .id_table = bu21013_id, | |
654 | }; | |
655 | ||
1b92c1cf | 656 | module_i2c_driver(bu21013_driver); |
4780c8df NKG |
657 | |
658 | MODULE_LICENSE("GPL v2"); | |
659 | MODULE_AUTHOR("Naveen Kumar G <naveen.gaddipati@stericsson.com>"); | |
660 | MODULE_DESCRIPTION("bu21013 touch screen controller driver"); |