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Commit | Line | Data |
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36a281e2 JB |
1 | /* |
2 | * Driver for Pixcir I2C touchscreen controllers. | |
3 | * | |
4 | * Copyright (C) 2010-2011 Pixcir, Inc. | |
5 | * | |
6 | * This software is licensed under the terms of the GNU General Public | |
7 | * License version 2, as published by the Free Software Foundation, and | |
8 | * may be copied, distributed, and modified under those terms. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public | |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
20 | #include <linux/delay.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/i2c.h> | |
25 | #include <linux/input.h> | |
62e65b7e | 26 | #include <linux/input/mt.h> |
0dfc8d41 | 27 | #include <linux/gpio.h> |
cb4a5f06 | 28 | #include <linux/gpio/consumer.h> |
a4054596 | 29 | #include <linux/of.h> |
a4054596 | 30 | #include <linux/of_device.h> |
28a74c05 | 31 | #include <linux/platform_data/pixcir_i2c_ts.h> |
36a281e2 | 32 | |
36874c7e | 33 | #define PIXCIR_MAX_SLOTS 5 /* Max fingers supported by driver */ |
62e65b7e | 34 | |
36a281e2 JB |
35 | struct pixcir_i2c_ts_data { |
36 | struct i2c_client *client; | |
37 | struct input_dev *input; | |
cb4a5f06 | 38 | struct gpio_desc *gpio_attb; |
36874c7e | 39 | const struct pixcir_ts_platform_data *pdata; |
3b36fbb0 | 40 | bool running; |
36874c7e | 41 | int max_fingers; /* Max fingers supported in this instance */ |
36a281e2 JB |
42 | }; |
43 | ||
62e65b7e RQ |
44 | struct pixcir_touch { |
45 | int x; | |
46 | int y; | |
36874c7e | 47 | int id; |
62e65b7e RQ |
48 | }; |
49 | ||
50 | struct pixcir_report_data { | |
51 | int num_touches; | |
52 | struct pixcir_touch touches[PIXCIR_MAX_SLOTS]; | |
53 | }; | |
54 | ||
55 | static void pixcir_ts_parse(struct pixcir_i2c_ts_data *tsdata, | |
56 | struct pixcir_report_data *report) | |
36a281e2 | 57 | { |
36874c7e RQ |
58 | u8 rdbuf[2 + PIXCIR_MAX_SLOTS * 5]; |
59 | u8 wrbuf[1] = { 0 }; | |
62e65b7e | 60 | u8 *bufptr; |
36a281e2 | 61 | u8 touch; |
62e65b7e | 62 | int ret, i; |
36874c7e RQ |
63 | int readsize; |
64 | const struct pixcir_i2c_chip_data *chip = &tsdata->pdata->chip; | |
62e65b7e RQ |
65 | |
66 | memset(report, 0, sizeof(struct pixcir_report_data)); | |
36a281e2 | 67 | |
36874c7e RQ |
68 | i = chip->has_hw_ids ? 1 : 0; |
69 | readsize = 2 + tsdata->max_fingers * (4 + i); | |
70 | if (readsize > sizeof(rdbuf)) | |
71 | readsize = sizeof(rdbuf); | |
72 | ||
36a281e2 JB |
73 | ret = i2c_master_send(tsdata->client, wrbuf, sizeof(wrbuf)); |
74 | if (ret != sizeof(wrbuf)) { | |
75 | dev_err(&tsdata->client->dev, | |
76 | "%s: i2c_master_send failed(), ret=%d\n", | |
77 | __func__, ret); | |
78 | return; | |
79 | } | |
80 | ||
36874c7e | 81 | ret = i2c_master_recv(tsdata->client, rdbuf, readsize); |
36a281e2 JB |
82 | if (ret != sizeof(rdbuf)) { |
83 | dev_err(&tsdata->client->dev, | |
84 | "%s: i2c_master_recv failed(), ret=%d\n", | |
85 | __func__, ret); | |
86 | return; | |
87 | } | |
88 | ||
62e65b7e | 89 | touch = rdbuf[0] & 0x7; |
36874c7e RQ |
90 | if (touch > tsdata->max_fingers) |
91 | touch = tsdata->max_fingers; | |
62e65b7e RQ |
92 | |
93 | report->num_touches = touch; | |
94 | bufptr = &rdbuf[2]; | |
95 | ||
96 | for (i = 0; i < touch; i++) { | |
97 | report->touches[i].x = (bufptr[1] << 8) | bufptr[0]; | |
98 | report->touches[i].y = (bufptr[3] << 8) | bufptr[2]; | |
99 | ||
36874c7e RQ |
100 | if (chip->has_hw_ids) { |
101 | report->touches[i].id = bufptr[4]; | |
102 | bufptr = bufptr + 5; | |
103 | } else { | |
104 | bufptr = bufptr + 4; | |
105 | } | |
36a281e2 | 106 | } |
62e65b7e RQ |
107 | } |
108 | ||
109 | static void pixcir_ts_report(struct pixcir_i2c_ts_data *ts, | |
110 | struct pixcir_report_data *report) | |
111 | { | |
112 | struct input_mt_pos pos[PIXCIR_MAX_SLOTS]; | |
113 | int slots[PIXCIR_MAX_SLOTS]; | |
114 | struct pixcir_touch *touch; | |
115 | int n, i, slot; | |
116 | struct device *dev = &ts->client->dev; | |
36874c7e | 117 | const struct pixcir_i2c_chip_data *chip = &ts->pdata->chip; |
62e65b7e RQ |
118 | |
119 | n = report->num_touches; | |
120 | if (n > PIXCIR_MAX_SLOTS) | |
121 | n = PIXCIR_MAX_SLOTS; | |
36a281e2 | 122 | |
36874c7e RQ |
123 | if (!chip->has_hw_ids) { |
124 | for (i = 0; i < n; i++) { | |
125 | touch = &report->touches[i]; | |
126 | pos[i].x = touch->x; | |
127 | pos[i].y = touch->y; | |
128 | } | |
62e65b7e | 129 | |
448c7f38 | 130 | input_mt_assign_slots(ts->input, slots, pos, n, 0); |
36874c7e | 131 | } |
62e65b7e RQ |
132 | |
133 | for (i = 0; i < n; i++) { | |
134 | touch = &report->touches[i]; | |
36874c7e RQ |
135 | |
136 | if (chip->has_hw_ids) { | |
137 | slot = input_mt_get_slot_by_key(ts->input, touch->id); | |
138 | if (slot < 0) { | |
139 | dev_dbg(dev, "no free slot for id 0x%x\n", | |
140 | touch->id); | |
141 | continue; | |
142 | } | |
143 | } else { | |
144 | slot = slots[i]; | |
145 | } | |
62e65b7e RQ |
146 | |
147 | input_mt_slot(ts->input, slot); | |
148 | input_mt_report_slot_state(ts->input, | |
149 | MT_TOOL_FINGER, true); | |
150 | ||
151 | input_event(ts->input, EV_ABS, ABS_MT_POSITION_X, touch->x); | |
152 | input_event(ts->input, EV_ABS, ABS_MT_POSITION_Y, touch->y); | |
153 | ||
154 | dev_dbg(dev, "%d: slot %d, x %d, y %d\n", | |
155 | i, slot, touch->x, touch->y); | |
156 | } | |
157 | ||
158 | input_mt_sync_frame(ts->input); | |
159 | input_sync(ts->input); | |
36a281e2 JB |
160 | } |
161 | ||
162 | static irqreturn_t pixcir_ts_isr(int irq, void *dev_id) | |
163 | { | |
164 | struct pixcir_i2c_ts_data *tsdata = dev_id; | |
62e65b7e | 165 | struct pixcir_report_data report; |
36a281e2 | 166 | |
3b36fbb0 | 167 | while (tsdata->running) { |
62e65b7e RQ |
168 | /* parse packet */ |
169 | pixcir_ts_parse(tsdata, &report); | |
170 | ||
171 | /* report it */ | |
172 | pixcir_ts_report(tsdata, &report); | |
173 | ||
cb4a5f06 | 174 | if (gpiod_get_value(tsdata->gpio_attb)) { |
62e65b7e RQ |
175 | if (report.num_touches) { |
176 | /* | |
177 | * Last report with no finger up? | |
178 | * Do it now then. | |
179 | */ | |
180 | input_mt_sync_frame(tsdata->input); | |
181 | input_sync(tsdata->input); | |
182 | } | |
36a281e2 | 183 | break; |
62e65b7e | 184 | } |
36a281e2 JB |
185 | |
186 | msleep(20); | |
187 | } | |
188 | ||
189 | return IRQ_HANDLED; | |
190 | } | |
191 | ||
3b36fbb0 RQ |
192 | static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts, |
193 | enum pixcir_power_mode mode) | |
194 | { | |
195 | struct device *dev = &ts->client->dev; | |
196 | int ret; | |
197 | ||
198 | ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE); | |
199 | if (ret < 0) { | |
200 | dev_err(dev, "%s: can't read reg 0x%x : %d\n", | |
201 | __func__, PIXCIR_REG_POWER_MODE, ret); | |
202 | return ret; | |
203 | } | |
204 | ||
205 | ret &= ~PIXCIR_POWER_MODE_MASK; | |
206 | ret |= mode; | |
207 | ||
208 | /* Always AUTO_IDLE */ | |
209 | ret |= PIXCIR_POWER_ALLOW_IDLE; | |
210 | ||
211 | ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_POWER_MODE, ret); | |
212 | if (ret < 0) { | |
213 | dev_err(dev, "%s: can't write reg 0x%x : %d\n", | |
214 | __func__, PIXCIR_REG_POWER_MODE, ret); | |
215 | return ret; | |
216 | } | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | /* | |
222 | * Set the interrupt mode for the device i.e. ATTB line behaviour | |
223 | * | |
224 | * @polarity : 1 for active high, 0 for active low. | |
225 | */ | |
226 | static int pixcir_set_int_mode(struct pixcir_i2c_ts_data *ts, | |
227 | enum pixcir_int_mode mode, bool polarity) | |
228 | { | |
229 | struct device *dev = &ts->client->dev; | |
230 | int ret; | |
231 | ||
232 | ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE); | |
233 | if (ret < 0) { | |
234 | dev_err(dev, "%s: can't read reg 0x%x : %d\n", | |
235 | __func__, PIXCIR_REG_INT_MODE, ret); | |
236 | return ret; | |
237 | } | |
238 | ||
239 | ret &= ~PIXCIR_INT_MODE_MASK; | |
240 | ret |= mode; | |
241 | ||
242 | if (polarity) | |
243 | ret |= PIXCIR_INT_POL_HIGH; | |
244 | else | |
245 | ret &= ~PIXCIR_INT_POL_HIGH; | |
246 | ||
247 | ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret); | |
248 | if (ret < 0) { | |
249 | dev_err(dev, "%s: can't write reg 0x%x : %d\n", | |
250 | __func__, PIXCIR_REG_INT_MODE, ret); | |
251 | return ret; | |
252 | } | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | /* | |
258 | * Enable/disable interrupt generation | |
259 | */ | |
260 | static int pixcir_int_enable(struct pixcir_i2c_ts_data *ts, bool enable) | |
261 | { | |
262 | struct device *dev = &ts->client->dev; | |
263 | int ret; | |
264 | ||
265 | ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE); | |
266 | if (ret < 0) { | |
267 | dev_err(dev, "%s: can't read reg 0x%x : %d\n", | |
268 | __func__, PIXCIR_REG_INT_MODE, ret); | |
269 | return ret; | |
270 | } | |
271 | ||
272 | if (enable) | |
273 | ret |= PIXCIR_INT_ENABLE; | |
274 | else | |
275 | ret &= ~PIXCIR_INT_ENABLE; | |
276 | ||
277 | ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret); | |
278 | if (ret < 0) { | |
279 | dev_err(dev, "%s: can't write reg 0x%x : %d\n", | |
280 | __func__, PIXCIR_REG_INT_MODE, ret); | |
281 | return ret; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | static int pixcir_start(struct pixcir_i2c_ts_data *ts) | |
288 | { | |
289 | struct device *dev = &ts->client->dev; | |
290 | int error; | |
291 | ||
292 | /* LEVEL_TOUCH interrupt with active low polarity */ | |
293 | error = pixcir_set_int_mode(ts, PIXCIR_INT_LEVEL_TOUCH, 0); | |
294 | if (error) { | |
295 | dev_err(dev, "Failed to set interrupt mode: %d\n", error); | |
296 | return error; | |
297 | } | |
298 | ||
299 | ts->running = true; | |
300 | mb(); /* Update status before IRQ can fire */ | |
301 | ||
302 | /* enable interrupt generation */ | |
303 | error = pixcir_int_enable(ts, true); | |
304 | if (error) { | |
305 | dev_err(dev, "Failed to enable interrupt generation: %d\n", | |
306 | error); | |
307 | return error; | |
308 | } | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
313 | static int pixcir_stop(struct pixcir_i2c_ts_data *ts) | |
314 | { | |
315 | int error; | |
316 | ||
317 | /* Disable interrupt generation */ | |
318 | error = pixcir_int_enable(ts, false); | |
319 | if (error) { | |
320 | dev_err(&ts->client->dev, | |
321 | "Failed to disable interrupt generation: %d\n", | |
322 | error); | |
323 | return error; | |
324 | } | |
325 | ||
326 | /* Exit ISR if running, no more report parsing */ | |
327 | ts->running = false; | |
328 | mb(); /* update status before we synchronize irq */ | |
329 | ||
330 | /* Wait till running ISR is complete */ | |
331 | synchronize_irq(ts->client->irq); | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | static int pixcir_input_open(struct input_dev *dev) | |
337 | { | |
338 | struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev); | |
339 | ||
340 | return pixcir_start(ts); | |
341 | } | |
342 | ||
343 | static void pixcir_input_close(struct input_dev *dev) | |
344 | { | |
345 | struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev); | |
346 | ||
347 | pixcir_stop(ts); | |
348 | } | |
349 | ||
02b6a58b | 350 | static int __maybe_unused pixcir_i2c_ts_suspend(struct device *dev) |
36a281e2 JB |
351 | { |
352 | struct i2c_client *client = to_i2c_client(dev); | |
7cdcb8d1 RQ |
353 | struct pixcir_i2c_ts_data *ts = i2c_get_clientdata(client); |
354 | struct input_dev *input = ts->input; | |
355 | int ret = 0; | |
356 | ||
357 | mutex_lock(&input->mutex); | |
358 | ||
359 | if (device_may_wakeup(&client->dev)) { | |
360 | if (!input->users) { | |
361 | ret = pixcir_start(ts); | |
362 | if (ret) { | |
363 | dev_err(dev, "Failed to start\n"); | |
364 | goto unlock; | |
365 | } | |
366 | } | |
36a281e2 | 367 | |
36a281e2 | 368 | enable_irq_wake(client->irq); |
7cdcb8d1 RQ |
369 | } else if (input->users) { |
370 | ret = pixcir_stop(ts); | |
371 | } | |
36a281e2 | 372 | |
7cdcb8d1 RQ |
373 | unlock: |
374 | mutex_unlock(&input->mutex); | |
375 | ||
376 | return ret; | |
36a281e2 JB |
377 | } |
378 | ||
02b6a58b | 379 | static int __maybe_unused pixcir_i2c_ts_resume(struct device *dev) |
36a281e2 JB |
380 | { |
381 | struct i2c_client *client = to_i2c_client(dev); | |
7cdcb8d1 RQ |
382 | struct pixcir_i2c_ts_data *ts = i2c_get_clientdata(client); |
383 | struct input_dev *input = ts->input; | |
384 | int ret = 0; | |
385 | ||
386 | mutex_lock(&input->mutex); | |
36a281e2 | 387 | |
7cdcb8d1 | 388 | if (device_may_wakeup(&client->dev)) { |
36a281e2 JB |
389 | disable_irq_wake(client->irq); |
390 | ||
7cdcb8d1 RQ |
391 | if (!input->users) { |
392 | ret = pixcir_stop(ts); | |
393 | if (ret) { | |
394 | dev_err(dev, "Failed to stop\n"); | |
395 | goto unlock; | |
396 | } | |
397 | } | |
398 | } else if (input->users) { | |
399 | ret = pixcir_start(ts); | |
400 | } | |
401 | ||
402 | unlock: | |
403 | mutex_unlock(&input->mutex); | |
404 | ||
405 | return ret; | |
36a281e2 | 406 | } |
36a281e2 JB |
407 | |
408 | static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops, | |
409 | pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume); | |
410 | ||
a4054596 RQ |
411 | #ifdef CONFIG_OF |
412 | static const struct of_device_id pixcir_of_match[]; | |
413 | ||
414 | static struct pixcir_ts_platform_data *pixcir_parse_dt(struct device *dev) | |
415 | { | |
416 | struct pixcir_ts_platform_data *pdata; | |
417 | struct device_node *np = dev->of_node; | |
418 | const struct of_device_id *match; | |
419 | ||
420 | match = of_match_device(of_match_ptr(pixcir_of_match), dev); | |
421 | if (!match) | |
422 | return ERR_PTR(-EINVAL); | |
423 | ||
424 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
425 | if (!pdata) | |
426 | return ERR_PTR(-ENOMEM); | |
427 | ||
428 | pdata->chip = *(const struct pixcir_i2c_chip_data *)match->data; | |
429 | ||
a4054596 RQ |
430 | if (of_property_read_u32(np, "touchscreen-size-x", &pdata->x_max)) { |
431 | dev_err(dev, "Failed to get touchscreen-size-x property\n"); | |
432 | return ERR_PTR(-EINVAL); | |
433 | } | |
434 | pdata->x_max -= 1; | |
435 | ||
436 | if (of_property_read_u32(np, "touchscreen-size-y", &pdata->y_max)) { | |
437 | dev_err(dev, "Failed to get touchscreen-size-y property\n"); | |
438 | return ERR_PTR(-EINVAL); | |
439 | } | |
440 | pdata->y_max -= 1; | |
441 | ||
cb4a5f06 DT |
442 | dev_dbg(dev, "%s: x %d, y %d\n", __func__, |
443 | pdata->x_max + 1, pdata->y_max + 1); | |
a4054596 RQ |
444 | |
445 | return pdata; | |
446 | } | |
447 | #else | |
448 | static struct pixcir_ts_platform_data *pixcir_parse_dt(struct device *dev) | |
449 | { | |
450 | return ERR_PTR(-EINVAL); | |
451 | } | |
452 | #endif | |
453 | ||
5298cc4c | 454 | static int pixcir_i2c_ts_probe(struct i2c_client *client, |
36a281e2 JB |
455 | const struct i2c_device_id *id) |
456 | { | |
c838cb3d JH |
457 | const struct pixcir_ts_platform_data *pdata = |
458 | dev_get_platdata(&client->dev); | |
e9d4718d | 459 | struct device *dev = &client->dev; |
a4054596 | 460 | struct device_node *np = dev->of_node; |
36a281e2 JB |
461 | struct pixcir_i2c_ts_data *tsdata; |
462 | struct input_dev *input; | |
463 | int error; | |
464 | ||
a4054596 RQ |
465 | if (np && !pdata) { |
466 | pdata = pixcir_parse_dt(dev); | |
467 | if (IS_ERR(pdata)) | |
468 | return PTR_ERR(pdata); | |
469 | } | |
470 | ||
36a281e2 JB |
471 | if (!pdata) { |
472 | dev_err(&client->dev, "platform data not defined\n"); | |
473 | return -EINVAL; | |
474 | } | |
475 | ||
36874c7e RQ |
476 | if (!pdata->chip.max_fingers) { |
477 | dev_err(dev, "Invalid max_fingers in pdata\n"); | |
478 | return -EINVAL; | |
479 | } | |
480 | ||
e9d4718d RQ |
481 | tsdata = devm_kzalloc(dev, sizeof(*tsdata), GFP_KERNEL); |
482 | if (!tsdata) | |
483 | return -ENOMEM; | |
484 | ||
485 | input = devm_input_allocate_device(dev); | |
486 | if (!input) { | |
487 | dev_err(dev, "Failed to allocate input device\n"); | |
488 | return -ENOMEM; | |
36a281e2 JB |
489 | } |
490 | ||
491 | tsdata->client = client; | |
492 | tsdata->input = input; | |
36874c7e | 493 | tsdata->pdata = pdata; |
36a281e2 JB |
494 | |
495 | input->name = client->name; | |
496 | input->id.bustype = BUS_I2C; | |
3b36fbb0 RQ |
497 | input->open = pixcir_input_open; |
498 | input->close = pixcir_input_close; | |
36a281e2 JB |
499 | input->dev.parent = &client->dev; |
500 | ||
501 | __set_bit(EV_KEY, input->evbit); | |
502 | __set_bit(EV_ABS, input->evbit); | |
503 | __set_bit(BTN_TOUCH, input->keybit); | |
504 | input_set_abs_params(input, ABS_X, 0, pdata->x_max, 0, 0); | |
505 | input_set_abs_params(input, ABS_Y, 0, pdata->y_max, 0, 0); | |
506 | input_set_abs_params(input, ABS_MT_POSITION_X, 0, pdata->x_max, 0, 0); | |
507 | input_set_abs_params(input, ABS_MT_POSITION_Y, 0, pdata->y_max, 0, 0); | |
508 | ||
36874c7e RQ |
509 | tsdata->max_fingers = tsdata->pdata->chip.max_fingers; |
510 | if (tsdata->max_fingers > PIXCIR_MAX_SLOTS) { | |
511 | tsdata->max_fingers = PIXCIR_MAX_SLOTS; | |
512 | dev_info(dev, "Limiting maximum fingers to %d\n", | |
513 | tsdata->max_fingers); | |
514 | } | |
515 | ||
516 | error = input_mt_init_slots(input, tsdata->max_fingers, | |
62e65b7e RQ |
517 | INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); |
518 | if (error) { | |
519 | dev_err(dev, "Error initializing Multi-Touch slots\n"); | |
520 | return error; | |
521 | } | |
522 | ||
36a281e2 JB |
523 | input_set_drvdata(input, tsdata); |
524 | ||
cb4a5f06 DT |
525 | tsdata->gpio_attb = devm_gpiod_get(dev, "attb", GPIOD_IN); |
526 | if (IS_ERR(tsdata->gpio_attb)) { | |
527 | error = PTR_ERR(tsdata->gpio_attb); | |
528 | dev_err(dev, "Failed to request ATTB gpio: %d\n", error); | |
0dfc8d41 RQ |
529 | return error; |
530 | } | |
531 | ||
e9d4718d RQ |
532 | error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr, |
533 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, | |
534 | client->name, tsdata); | |
36a281e2 | 535 | if (error) { |
e9d4718d RQ |
536 | dev_err(dev, "failed to request irq %d\n", client->irq); |
537 | return error; | |
36a281e2 JB |
538 | } |
539 | ||
3b36fbb0 RQ |
540 | /* Always be in IDLE mode to save power, device supports auto wake */ |
541 | error = pixcir_set_power_mode(tsdata, PIXCIR_POWER_IDLE); | |
542 | if (error) { | |
543 | dev_err(dev, "Failed to set IDLE mode\n"); | |
544 | return error; | |
545 | } | |
546 | ||
547 | /* Stop device till opened */ | |
548 | error = pixcir_stop(tsdata); | |
549 | if (error) | |
550 | return error; | |
551 | ||
36a281e2 JB |
552 | error = input_register_device(input); |
553 | if (error) | |
e9d4718d | 554 | return error; |
36a281e2 | 555 | |
7cdcb8d1 | 556 | i2c_set_clientdata(client, tsdata); |
36a281e2 JB |
557 | device_init_wakeup(&client->dev, 1); |
558 | ||
559 | return 0; | |
36a281e2 JB |
560 | } |
561 | ||
e2619cf7 | 562 | static int pixcir_i2c_ts_remove(struct i2c_client *client) |
36a281e2 | 563 | { |
36a281e2 JB |
564 | device_init_wakeup(&client->dev, 0); |
565 | ||
36a281e2 JB |
566 | return 0; |
567 | } | |
568 | ||
569 | static const struct i2c_device_id pixcir_i2c_ts_id[] = { | |
570 | { "pixcir_ts", 0 }, | |
a4054596 | 571 | { "pixcir_tangoc", 0 }, |
36a281e2 JB |
572 | { } |
573 | }; | |
574 | MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id); | |
575 | ||
a4054596 RQ |
576 | #ifdef CONFIG_OF |
577 | static const struct pixcir_i2c_chip_data pixcir_ts_data = { | |
578 | .max_fingers = 2, | |
579 | /* no hw id support */ | |
580 | }; | |
581 | ||
582 | static const struct pixcir_i2c_chip_data pixcir_tangoc_data = { | |
583 | .max_fingers = 5, | |
584 | .has_hw_ids = true, | |
585 | }; | |
586 | ||
587 | static const struct of_device_id pixcir_of_match[] = { | |
588 | { .compatible = "pixcir,pixcir_ts", .data = &pixcir_ts_data }, | |
589 | { .compatible = "pixcir,pixcir_tangoc", .data = &pixcir_tangoc_data }, | |
590 | { } | |
591 | }; | |
592 | MODULE_DEVICE_TABLE(of, pixcir_of_match); | |
593 | #endif | |
594 | ||
36a281e2 JB |
595 | static struct i2c_driver pixcir_i2c_ts_driver = { |
596 | .driver = { | |
597 | .owner = THIS_MODULE, | |
598 | .name = "pixcir_ts", | |
599 | .pm = &pixcir_dev_pm_ops, | |
a4054596 | 600 | .of_match_table = of_match_ptr(pixcir_of_match), |
36a281e2 JB |
601 | }, |
602 | .probe = pixcir_i2c_ts_probe, | |
1cb0aa88 | 603 | .remove = pixcir_i2c_ts_remove, |
36a281e2 JB |
604 | .id_table = pixcir_i2c_ts_id, |
605 | }; | |
606 | ||
4a533835 | 607 | module_i2c_driver(pixcir_i2c_ts_driver); |
36a281e2 JB |
608 | |
609 | MODULE_AUTHOR("Jianchun Bian <jcbian@pixcir.com.cn>, Dequan Meng <dqmeng@pixcir.com.cn>"); | |
610 | MODULE_DESCRIPTION("Pixcir I2C Touchscreen Driver"); | |
611 | MODULE_LICENSE("GPL"); |