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6ac24381 MW |
1 | /* |
2 | * TSC2004/TSC2005 touchscreen driver core | |
3 | * | |
4 | * Copyright (C) 2006-2010 Nokia Corporation | |
5 | * Copyright (C) 2015 QWERTY Embedded Design | |
6 | * Copyright (C) 2015 EMAC Inc. | |
7 | * | |
8 | * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com> | |
9 | * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/input.h> | |
25 | #include <linux/input/touchscreen.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/pm.h> | |
29 | #include <linux/of.h> | |
6ac24381 MW |
30 | #include <linux/regulator/consumer.h> |
31 | #include <linux/regmap.h> | |
32 | #include <linux/gpio/consumer.h> | |
33 | #include "tsc200x-core.h" | |
34 | ||
35 | /* | |
36 | * The touchscreen interface operates as follows: | |
37 | * | |
38 | * 1) Pen is pressed against the touchscreen. | |
ef3b98c2 MW |
39 | * 2) TSC200X performs AD conversion. |
40 | * 3) After the conversion is done TSC200X drives DAV line down. | |
41 | * 4) GPIO IRQ is received and tsc200x_irq_thread() is scheduled. | |
42 | * 5) tsc200x_irq_thread() queues up a transfer to fetch the x, y, z1, z2 | |
6ac24381 | 43 | * values. |
ef3b98c2 MW |
44 | * 6) tsc200x_irq_thread() reports coordinates to input layer and sets up |
45 | * tsc200x_penup_timer() to be called after TSC200X_PENUP_TIME_MS (40ms). | |
6ac24381 MW |
46 | * 7) When the penup timer expires, there have not been touch or DAV interrupts |
47 | * during the last 40ms which means the pen has been lifted. | |
48 | * | |
ef3b98c2 | 49 | * ESD recovery via a hardware reset is done if the TSC200X doesn't respond |
6ac24381 MW |
50 | * after a configurable period (in ms) of activity. If esd_timeout is 0, the |
51 | * watchdog is disabled. | |
52 | */ | |
53 | ||
ef3b98c2 MW |
54 | static const struct regmap_range tsc200x_writable_ranges[] = { |
55 | regmap_reg_range(TSC200X_REG_AUX_HIGH, TSC200X_REG_CFR2), | |
6ac24381 MW |
56 | }; |
57 | ||
ef3b98c2 MW |
58 | static const struct regmap_access_table tsc200x_writable_table = { |
59 | .yes_ranges = tsc200x_writable_ranges, | |
60 | .n_yes_ranges = ARRAY_SIZE(tsc200x_writable_ranges), | |
6ac24381 MW |
61 | }; |
62 | ||
63 | const struct regmap_config tsc200x_regmap_config = { | |
64 | .reg_bits = 8, | |
65 | .val_bits = 16, | |
66 | .reg_stride = 0x08, | |
67 | .max_register = 0x78, | |
ef3b98c2 MW |
68 | .read_flag_mask = TSC200X_REG_READ, |
69 | .write_flag_mask = TSC200X_REG_PND0, | |
70 | .wr_table = &tsc200x_writable_table, | |
1c96a2f6 DF |
71 | .use_single_read = true, |
72 | .use_single_write = true, | |
6ac24381 MW |
73 | }; |
74 | EXPORT_SYMBOL_GPL(tsc200x_regmap_config); | |
75 | ||
ef3b98c2 | 76 | struct tsc200x_data { |
6ac24381 MW |
77 | u16 x; |
78 | u16 y; | |
79 | u16 z1; | |
80 | u16 z2; | |
81 | } __packed; | |
ef3b98c2 | 82 | #define TSC200X_DATA_REGS 4 |
6ac24381 | 83 | |
ef3b98c2 | 84 | struct tsc200x { |
6ac24381 MW |
85 | struct device *dev; |
86 | struct regmap *regmap; | |
87 | __u16 bustype; | |
88 | ||
89 | struct input_dev *idev; | |
90 | char phys[32]; | |
91 | ||
92 | struct mutex mutex; | |
93 | ||
94 | /* raw copy of previous x,y,z */ | |
95 | int in_x; | |
96 | int in_y; | |
97 | int in_z1; | |
98 | int in_z2; | |
99 | ||
100 | spinlock_t lock; | |
101 | struct timer_list penup_timer; | |
102 | ||
103 | unsigned int esd_timeout; | |
104 | struct delayed_work esd_work; | |
105 | unsigned long last_valid_interrupt; | |
106 | ||
107 | unsigned int x_plate_ohm; | |
108 | ||
109 | bool opened; | |
110 | bool suspended; | |
111 | ||
112 | bool pen_down; | |
113 | ||
114 | struct regulator *vio; | |
115 | ||
116 | struct gpio_desc *reset_gpio; | |
6ac24381 MW |
117 | int (*tsc200x_cmd)(struct device *dev, u8 cmd); |
118 | int irq; | |
119 | }; | |
120 | ||
ef3b98c2 | 121 | static void tsc200x_update_pen_state(struct tsc200x *ts, |
6ac24381 MW |
122 | int x, int y, int pressure) |
123 | { | |
124 | if (pressure) { | |
125 | input_report_abs(ts->idev, ABS_X, x); | |
126 | input_report_abs(ts->idev, ABS_Y, y); | |
127 | input_report_abs(ts->idev, ABS_PRESSURE, pressure); | |
128 | if (!ts->pen_down) { | |
129 | input_report_key(ts->idev, BTN_TOUCH, !!pressure); | |
130 | ts->pen_down = true; | |
131 | } | |
132 | } else { | |
133 | input_report_abs(ts->idev, ABS_PRESSURE, 0); | |
134 | if (ts->pen_down) { | |
135 | input_report_key(ts->idev, BTN_TOUCH, 0); | |
136 | ts->pen_down = false; | |
137 | } | |
138 | } | |
139 | input_sync(ts->idev); | |
140 | dev_dbg(ts->dev, "point(%4d,%4d), pressure (%4d)\n", x, y, | |
141 | pressure); | |
142 | } | |
143 | ||
ef3b98c2 | 144 | static irqreturn_t tsc200x_irq_thread(int irq, void *_ts) |
6ac24381 | 145 | { |
ef3b98c2 | 146 | struct tsc200x *ts = _ts; |
6ac24381 MW |
147 | unsigned long flags; |
148 | unsigned int pressure; | |
ef3b98c2 | 149 | struct tsc200x_data tsdata; |
6ac24381 MW |
150 | int error; |
151 | ||
152 | /* read the coordinates */ | |
ef3b98c2 MW |
153 | error = regmap_bulk_read(ts->regmap, TSC200X_REG_X, &tsdata, |
154 | TSC200X_DATA_REGS); | |
6ac24381 MW |
155 | if (unlikely(error)) |
156 | goto out; | |
157 | ||
158 | /* validate position */ | |
159 | if (unlikely(tsdata.x > MAX_12BIT || tsdata.y > MAX_12BIT)) | |
160 | goto out; | |
161 | ||
162 | /* Skip reading if the pressure components are out of range */ | |
163 | if (unlikely(tsdata.z1 == 0 || tsdata.z2 > MAX_12BIT)) | |
164 | goto out; | |
165 | if (unlikely(tsdata.z1 >= tsdata.z2)) | |
166 | goto out; | |
167 | ||
168 | /* | |
169 | * Skip point if this is a pen down with the exact same values as | |
170 | * the value before pen-up - that implies SPI fed us stale data | |
171 | */ | |
172 | if (!ts->pen_down && | |
173 | ts->in_x == tsdata.x && ts->in_y == tsdata.y && | |
174 | ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) { | |
175 | goto out; | |
176 | } | |
177 | ||
178 | /* | |
179 | * At this point we are happy we have a valid and useful reading. | |
180 | * Remember it for later comparisons. We may now begin downsampling. | |
181 | */ | |
182 | ts->in_x = tsdata.x; | |
183 | ts->in_y = tsdata.y; | |
184 | ts->in_z1 = tsdata.z1; | |
185 | ts->in_z2 = tsdata.z2; | |
186 | ||
187 | /* Compute touch pressure resistance using equation #1 */ | |
188 | pressure = tsdata.x * (tsdata.z2 - tsdata.z1) / tsdata.z1; | |
189 | pressure = pressure * ts->x_plate_ohm / 4096; | |
190 | if (unlikely(pressure > MAX_12BIT)) | |
191 | goto out; | |
192 | ||
193 | spin_lock_irqsave(&ts->lock, flags); | |
194 | ||
ef3b98c2 | 195 | tsc200x_update_pen_state(ts, tsdata.x, tsdata.y, pressure); |
6ac24381 | 196 | mod_timer(&ts->penup_timer, |
ef3b98c2 | 197 | jiffies + msecs_to_jiffies(TSC200X_PENUP_TIME_MS)); |
6ac24381 MW |
198 | |
199 | spin_unlock_irqrestore(&ts->lock, flags); | |
200 | ||
201 | ts->last_valid_interrupt = jiffies; | |
202 | out: | |
203 | return IRQ_HANDLED; | |
204 | } | |
205 | ||
ee03e3f0 | 206 | static void tsc200x_penup_timer(struct timer_list *t) |
6ac24381 | 207 | { |
ee03e3f0 | 208 | struct tsc200x *ts = from_timer(ts, t, penup_timer); |
6ac24381 MW |
209 | unsigned long flags; |
210 | ||
211 | spin_lock_irqsave(&ts->lock, flags); | |
ef3b98c2 | 212 | tsc200x_update_pen_state(ts, 0, 0, 0); |
6ac24381 MW |
213 | spin_unlock_irqrestore(&ts->lock, flags); |
214 | } | |
215 | ||
ef3b98c2 | 216 | static void tsc200x_start_scan(struct tsc200x *ts) |
6ac24381 | 217 | { |
ef3b98c2 MW |
218 | regmap_write(ts->regmap, TSC200X_REG_CFR0, TSC200X_CFR0_INITVALUE); |
219 | regmap_write(ts->regmap, TSC200X_REG_CFR1, TSC200X_CFR1_INITVALUE); | |
220 | regmap_write(ts->regmap, TSC200X_REG_CFR2, TSC200X_CFR2_INITVALUE); | |
221 | ts->tsc200x_cmd(ts->dev, TSC200X_CMD_NORMAL); | |
6ac24381 MW |
222 | } |
223 | ||
ef3b98c2 | 224 | static void tsc200x_stop_scan(struct tsc200x *ts) |
6ac24381 | 225 | { |
ef3b98c2 | 226 | ts->tsc200x_cmd(ts->dev, TSC200X_CMD_STOP); |
6ac24381 MW |
227 | } |
228 | ||
d0d89493 | 229 | static void tsc200x_reset(struct tsc200x *ts) |
6ac24381 | 230 | { |
d0d89493 DT |
231 | if (ts->reset_gpio) { |
232 | gpiod_set_value_cansleep(ts->reset_gpio, 1); | |
233 | usleep_range(100, 500); /* only 10us required */ | |
234 | gpiod_set_value_cansleep(ts->reset_gpio, 0); | |
235 | } | |
6ac24381 MW |
236 | } |
237 | ||
238 | /* must be called with ts->mutex held */ | |
ef3b98c2 | 239 | static void __tsc200x_disable(struct tsc200x *ts) |
6ac24381 | 240 | { |
ef3b98c2 | 241 | tsc200x_stop_scan(ts); |
6ac24381 MW |
242 | |
243 | disable_irq(ts->irq); | |
244 | del_timer_sync(&ts->penup_timer); | |
245 | ||
246 | cancel_delayed_work_sync(&ts->esd_work); | |
247 | ||
248 | enable_irq(ts->irq); | |
249 | } | |
250 | ||
251 | /* must be called with ts->mutex held */ | |
ef3b98c2 | 252 | static void __tsc200x_enable(struct tsc200x *ts) |
6ac24381 | 253 | { |
ef3b98c2 | 254 | tsc200x_start_scan(ts); |
6ac24381 | 255 | |
d0d89493 | 256 | if (ts->esd_timeout && ts->reset_gpio) { |
6ac24381 MW |
257 | ts->last_valid_interrupt = jiffies; |
258 | schedule_delayed_work(&ts->esd_work, | |
259 | round_jiffies_relative( | |
260 | msecs_to_jiffies(ts->esd_timeout))); | |
261 | } | |
262 | } | |
263 | ||
ef3b98c2 | 264 | static ssize_t tsc200x_selftest_show(struct device *dev, |
6ac24381 MW |
265 | struct device_attribute *attr, |
266 | char *buf) | |
267 | { | |
ef3b98c2 | 268 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 MW |
269 | unsigned int temp_high; |
270 | unsigned int temp_high_orig; | |
271 | unsigned int temp_high_test; | |
272 | bool success = true; | |
273 | int error; | |
274 | ||
275 | mutex_lock(&ts->mutex); | |
276 | ||
277 | /* | |
ef3b98c2 | 278 | * Test TSC200X communications via temp high register. |
6ac24381 | 279 | */ |
ef3b98c2 | 280 | __tsc200x_disable(ts); |
6ac24381 | 281 | |
ef3b98c2 | 282 | error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high_orig); |
6ac24381 MW |
283 | if (error) { |
284 | dev_warn(dev, "selftest failed: read error %d\n", error); | |
285 | success = false; | |
286 | goto out; | |
287 | } | |
288 | ||
289 | temp_high_test = (temp_high_orig - 1) & MAX_12BIT; | |
290 | ||
ef3b98c2 | 291 | error = regmap_write(ts->regmap, TSC200X_REG_TEMP_HIGH, temp_high_test); |
6ac24381 MW |
292 | if (error) { |
293 | dev_warn(dev, "selftest failed: write error %d\n", error); | |
294 | success = false; | |
295 | goto out; | |
296 | } | |
297 | ||
ef3b98c2 | 298 | error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high); |
6ac24381 MW |
299 | if (error) { |
300 | dev_warn(dev, "selftest failed: read error %d after write\n", | |
301 | error); | |
302 | success = false; | |
303 | goto out; | |
304 | } | |
305 | ||
306 | if (temp_high != temp_high_test) { | |
307 | dev_warn(dev, "selftest failed: %d != %d\n", | |
308 | temp_high, temp_high_test); | |
309 | success = false; | |
310 | } | |
311 | ||
312 | /* hardware reset */ | |
d0d89493 | 313 | tsc200x_reset(ts); |
6ac24381 MW |
314 | |
315 | if (!success) | |
316 | goto out; | |
317 | ||
318 | /* test that the reset really happened */ | |
ef3b98c2 | 319 | error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high); |
6ac24381 MW |
320 | if (error) { |
321 | dev_warn(dev, "selftest failed: read error %d after reset\n", | |
322 | error); | |
323 | success = false; | |
324 | goto out; | |
325 | } | |
326 | ||
327 | if (temp_high != temp_high_orig) { | |
328 | dev_warn(dev, "selftest failed after reset: %d != %d\n", | |
329 | temp_high, temp_high_orig); | |
330 | success = false; | |
331 | } | |
332 | ||
333 | out: | |
ef3b98c2 | 334 | __tsc200x_enable(ts); |
6ac24381 MW |
335 | mutex_unlock(&ts->mutex); |
336 | ||
337 | return sprintf(buf, "%d\n", success); | |
338 | } | |
339 | ||
ef3b98c2 | 340 | static DEVICE_ATTR(selftest, S_IRUGO, tsc200x_selftest_show, NULL); |
6ac24381 | 341 | |
ef3b98c2 | 342 | static struct attribute *tsc200x_attrs[] = { |
6ac24381 MW |
343 | &dev_attr_selftest.attr, |
344 | NULL | |
345 | }; | |
346 | ||
ef3b98c2 | 347 | static umode_t tsc200x_attr_is_visible(struct kobject *kobj, |
6ac24381 MW |
348 | struct attribute *attr, int n) |
349 | { | |
350 | struct device *dev = container_of(kobj, struct device, kobj); | |
ef3b98c2 | 351 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 MW |
352 | umode_t mode = attr->mode; |
353 | ||
354 | if (attr == &dev_attr_selftest.attr) { | |
d0d89493 | 355 | if (!ts->reset_gpio) |
6ac24381 MW |
356 | mode = 0; |
357 | } | |
358 | ||
359 | return mode; | |
360 | } | |
361 | ||
ef3b98c2 MW |
362 | static const struct attribute_group tsc200x_attr_group = { |
363 | .is_visible = tsc200x_attr_is_visible, | |
364 | .attrs = tsc200x_attrs, | |
6ac24381 MW |
365 | }; |
366 | ||
ef3b98c2 | 367 | static void tsc200x_esd_work(struct work_struct *work) |
6ac24381 | 368 | { |
ef3b98c2 | 369 | struct tsc200x *ts = container_of(work, struct tsc200x, esd_work.work); |
6ac24381 MW |
370 | int error; |
371 | unsigned int r; | |
372 | ||
373 | if (!mutex_trylock(&ts->mutex)) { | |
374 | /* | |
375 | * If the mutex is taken, it means that disable or enable is in | |
376 | * progress. In that case just reschedule the work. If the work | |
377 | * is not needed, it will be canceled by disable. | |
378 | */ | |
379 | goto reschedule; | |
380 | } | |
381 | ||
382 | if (time_is_after_jiffies(ts->last_valid_interrupt + | |
383 | msecs_to_jiffies(ts->esd_timeout))) | |
384 | goto out; | |
385 | ||
386 | /* We should be able to read register without disabling interrupts. */ | |
ef3b98c2 | 387 | error = regmap_read(ts->regmap, TSC200X_REG_CFR0, &r); |
6ac24381 | 388 | if (!error && |
ef3b98c2 | 389 | !((r ^ TSC200X_CFR0_INITVALUE) & TSC200X_CFR0_RW_MASK)) { |
6ac24381 MW |
390 | goto out; |
391 | } | |
392 | ||
393 | /* | |
394 | * If we could not read our known value from configuration register 0 | |
395 | * then we should reset the controller as if from power-up and start | |
396 | * scanning again. | |
397 | */ | |
ef3b98c2 | 398 | dev_info(ts->dev, "TSC200X not responding - resetting\n"); |
6ac24381 MW |
399 | |
400 | disable_irq(ts->irq); | |
401 | del_timer_sync(&ts->penup_timer); | |
402 | ||
ef3b98c2 | 403 | tsc200x_update_pen_state(ts, 0, 0, 0); |
6ac24381 | 404 | |
d0d89493 | 405 | tsc200x_reset(ts); |
6ac24381 MW |
406 | |
407 | enable_irq(ts->irq); | |
ef3b98c2 | 408 | tsc200x_start_scan(ts); |
6ac24381 MW |
409 | |
410 | out: | |
411 | mutex_unlock(&ts->mutex); | |
412 | reschedule: | |
413 | /* re-arm the watchdog */ | |
414 | schedule_delayed_work(&ts->esd_work, | |
415 | round_jiffies_relative( | |
416 | msecs_to_jiffies(ts->esd_timeout))); | |
417 | } | |
418 | ||
ef3b98c2 | 419 | static int tsc200x_open(struct input_dev *input) |
6ac24381 | 420 | { |
ef3b98c2 | 421 | struct tsc200x *ts = input_get_drvdata(input); |
6ac24381 MW |
422 | |
423 | mutex_lock(&ts->mutex); | |
424 | ||
425 | if (!ts->suspended) | |
ef3b98c2 | 426 | __tsc200x_enable(ts); |
6ac24381 MW |
427 | |
428 | ts->opened = true; | |
429 | ||
430 | mutex_unlock(&ts->mutex); | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
ef3b98c2 | 435 | static void tsc200x_close(struct input_dev *input) |
6ac24381 | 436 | { |
ef3b98c2 | 437 | struct tsc200x *ts = input_get_drvdata(input); |
6ac24381 MW |
438 | |
439 | mutex_lock(&ts->mutex); | |
440 | ||
441 | if (!ts->suspended) | |
ef3b98c2 | 442 | __tsc200x_disable(ts); |
6ac24381 MW |
443 | |
444 | ts->opened = false; | |
445 | ||
446 | mutex_unlock(&ts->mutex); | |
447 | } | |
448 | ||
e9003c9c | 449 | int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id, |
6ac24381 MW |
450 | struct regmap *regmap, |
451 | int (*tsc200x_cmd)(struct device *dev, u8 cmd)) | |
452 | { | |
ef3b98c2 | 453 | struct tsc200x *ts; |
6ac24381 | 454 | struct input_dev *input_dev; |
d0d89493 DT |
455 | u32 x_plate_ohm; |
456 | u32 esd_timeout; | |
6ac24381 MW |
457 | int error; |
458 | ||
6ac24381 MW |
459 | if (irq <= 0) { |
460 | dev_err(dev, "no irq\n"); | |
461 | return -ENODEV; | |
462 | } | |
463 | ||
464 | if (IS_ERR(regmap)) | |
465 | return PTR_ERR(regmap); | |
466 | ||
467 | if (!tsc200x_cmd) { | |
468 | dev_err(dev, "no cmd function\n"); | |
469 | return -ENODEV; | |
470 | } | |
471 | ||
6ac24381 MW |
472 | ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); |
473 | if (!ts) | |
474 | return -ENOMEM; | |
475 | ||
476 | input_dev = devm_input_allocate_device(dev); | |
477 | if (!input_dev) | |
478 | return -ENOMEM; | |
479 | ||
480 | ts->irq = irq; | |
481 | ts->dev = dev; | |
482 | ts->idev = input_dev; | |
483 | ts->regmap = regmap; | |
484 | ts->tsc200x_cmd = tsc200x_cmd; | |
d0d89493 DT |
485 | |
486 | error = device_property_read_u32(dev, "ti,x-plate-ohms", &x_plate_ohm); | |
487 | ts->x_plate_ohm = error ? TSC200X_DEF_RESISTOR : x_plate_ohm; | |
488 | ||
489 | error = device_property_read_u32(dev, "ti,esd-recovery-timeout-ms", | |
490 | &esd_timeout); | |
491 | ts->esd_timeout = error ? 0 : esd_timeout; | |
6ac24381 MW |
492 | |
493 | ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); | |
494 | if (IS_ERR(ts->reset_gpio)) { | |
495 | error = PTR_ERR(ts->reset_gpio); | |
496 | dev_err(dev, "error acquiring reset gpio: %d\n", error); | |
497 | return error; | |
498 | } | |
499 | ||
f7bf6f58 | 500 | ts->vio = devm_regulator_get(dev, "vio"); |
6ac24381 MW |
501 | if (IS_ERR(ts->vio)) { |
502 | error = PTR_ERR(ts->vio); | |
f7bf6f58 | 503 | dev_err(dev, "error acquiring vio regulator: %d", error); |
6ac24381 MW |
504 | return error; |
505 | } | |
506 | ||
6ac24381 MW |
507 | mutex_init(&ts->mutex); |
508 | ||
509 | spin_lock_init(&ts->lock); | |
ee03e3f0 | 510 | timer_setup(&ts->penup_timer, tsc200x_penup_timer, 0); |
6ac24381 | 511 | |
ef3b98c2 | 512 | INIT_DELAYED_WORK(&ts->esd_work, tsc200x_esd_work); |
6ac24381 MW |
513 | |
514 | snprintf(ts->phys, sizeof(ts->phys), | |
515 | "%s/input-ts", dev_name(dev)); | |
516 | ||
e9003c9c MW |
517 | if (tsc_id->product == 2004) { |
518 | input_dev->name = "TSC200X touchscreen"; | |
519 | } else { | |
520 | input_dev->name = devm_kasprintf(dev, GFP_KERNEL, | |
521 | "TSC%04d touchscreen", | |
522 | tsc_id->product); | |
523 | if (!input_dev->name) | |
524 | return -ENOMEM; | |
525 | } | |
526 | ||
6ac24381 | 527 | input_dev->phys = ts->phys; |
e9003c9c | 528 | input_dev->id = *tsc_id; |
6ac24381 | 529 | |
ef3b98c2 MW |
530 | input_dev->open = tsc200x_open; |
531 | input_dev->close = tsc200x_close; | |
6ac24381 MW |
532 | |
533 | input_set_drvdata(input_dev, ts); | |
534 | ||
eca25391 | 535 | __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); |
d0d89493 DT |
536 | input_set_capability(input_dev, EV_KEY, BTN_TOUCH); |
537 | ||
538 | input_set_abs_params(input_dev, ABS_X, | |
539 | 0, MAX_12BIT, TSC200X_DEF_X_FUZZ, 0); | |
540 | input_set_abs_params(input_dev, ABS_Y, | |
541 | 0, MAX_12BIT, TSC200X_DEF_Y_FUZZ, 0); | |
542 | input_set_abs_params(input_dev, ABS_PRESSURE, | |
543 | 0, MAX_12BIT, TSC200X_DEF_P_FUZZ, 0); | |
544 | ||
545 | touchscreen_parse_properties(input_dev, false, NULL); | |
546 | ||
6ac24381 | 547 | /* Ensure the touchscreen is off */ |
ef3b98c2 | 548 | tsc200x_stop_scan(ts); |
6ac24381 MW |
549 | |
550 | error = devm_request_threaded_irq(dev, irq, NULL, | |
ef3b98c2 | 551 | tsc200x_irq_thread, |
6ac24381 | 552 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
ef3b98c2 | 553 | "tsc200x", ts); |
6ac24381 MW |
554 | if (error) { |
555 | dev_err(dev, "Failed to request irq, err: %d\n", error); | |
556 | return error; | |
557 | } | |
558 | ||
f7bf6f58 DT |
559 | error = regulator_enable(ts->vio); |
560 | if (error) | |
561 | return error; | |
6ac24381 MW |
562 | |
563 | dev_set_drvdata(dev, ts); | |
ef3b98c2 | 564 | error = sysfs_create_group(&dev->kobj, &tsc200x_attr_group); |
6ac24381 MW |
565 | if (error) { |
566 | dev_err(dev, | |
567 | "Failed to create sysfs attributes, err: %d\n", error); | |
568 | goto disable_regulator; | |
569 | } | |
570 | ||
571 | error = input_register_device(ts->idev); | |
572 | if (error) { | |
573 | dev_err(dev, | |
574 | "Failed to register input device, err: %d\n", error); | |
575 | goto err_remove_sysfs; | |
576 | } | |
577 | ||
578 | irq_set_irq_wake(irq, 1); | |
579 | return 0; | |
580 | ||
581 | err_remove_sysfs: | |
ef3b98c2 | 582 | sysfs_remove_group(&dev->kobj, &tsc200x_attr_group); |
6ac24381 | 583 | disable_regulator: |
f7bf6f58 | 584 | regulator_disable(ts->vio); |
6ac24381 MW |
585 | return error; |
586 | } | |
587 | EXPORT_SYMBOL_GPL(tsc200x_probe); | |
588 | ||
589 | int tsc200x_remove(struct device *dev) | |
590 | { | |
ef3b98c2 | 591 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 | 592 | |
ef3b98c2 | 593 | sysfs_remove_group(&dev->kobj, &tsc200x_attr_group); |
6ac24381 | 594 | |
f7bf6f58 | 595 | regulator_disable(ts->vio); |
6ac24381 MW |
596 | |
597 | return 0; | |
598 | } | |
599 | EXPORT_SYMBOL_GPL(tsc200x_remove); | |
600 | ||
ef3b98c2 | 601 | static int __maybe_unused tsc200x_suspend(struct device *dev) |
6ac24381 | 602 | { |
ef3b98c2 | 603 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 MW |
604 | |
605 | mutex_lock(&ts->mutex); | |
606 | ||
607 | if (!ts->suspended && ts->opened) | |
ef3b98c2 | 608 | __tsc200x_disable(ts); |
6ac24381 MW |
609 | |
610 | ts->suspended = true; | |
611 | ||
612 | mutex_unlock(&ts->mutex); | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
ef3b98c2 | 617 | static int __maybe_unused tsc200x_resume(struct device *dev) |
6ac24381 | 618 | { |
ef3b98c2 | 619 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 MW |
620 | |
621 | mutex_lock(&ts->mutex); | |
622 | ||
623 | if (ts->suspended && ts->opened) | |
ef3b98c2 | 624 | __tsc200x_enable(ts); |
6ac24381 MW |
625 | |
626 | ts->suspended = false; | |
627 | ||
628 | mutex_unlock(&ts->mutex); | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
ef3b98c2 | 633 | SIMPLE_DEV_PM_OPS(tsc200x_pm_ops, tsc200x_suspend, tsc200x_resume); |
6ac24381 MW |
634 | EXPORT_SYMBOL_GPL(tsc200x_pm_ops); |
635 | ||
636 | MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>"); | |
ef3b98c2 | 637 | MODULE_DESCRIPTION("TSC200x Touchscreen Driver Core"); |
6ac24381 | 638 | MODULE_LICENSE("GPL"); |