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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
6ac24381 MW |
2 | /* |
3 | * TSC2004/TSC2005 touchscreen driver core | |
4 | * | |
5 | * Copyright (C) 2006-2010 Nokia Corporation | |
6 | * Copyright (C) 2015 QWERTY Embedded Design | |
7 | * Copyright (C) 2015 EMAC Inc. | |
8 | * | |
9 | * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com> | |
10 | * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com> | |
6ac24381 MW |
11 | */ |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/input.h> | |
16 | #include <linux/input/touchscreen.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/pm.h> | |
20 | #include <linux/of.h> | |
6ac24381 MW |
21 | #include <linux/regulator/consumer.h> |
22 | #include <linux/regmap.h> | |
23 | #include <linux/gpio/consumer.h> | |
24 | #include "tsc200x-core.h" | |
25 | ||
26 | /* | |
27 | * The touchscreen interface operates as follows: | |
28 | * | |
29 | * 1) Pen is pressed against the touchscreen. | |
ef3b98c2 MW |
30 | * 2) TSC200X performs AD conversion. |
31 | * 3) After the conversion is done TSC200X drives DAV line down. | |
32 | * 4) GPIO IRQ is received and tsc200x_irq_thread() is scheduled. | |
33 | * 5) tsc200x_irq_thread() queues up a transfer to fetch the x, y, z1, z2 | |
6ac24381 | 34 | * values. |
ef3b98c2 MW |
35 | * 6) tsc200x_irq_thread() reports coordinates to input layer and sets up |
36 | * tsc200x_penup_timer() to be called after TSC200X_PENUP_TIME_MS (40ms). | |
6ac24381 MW |
37 | * 7) When the penup timer expires, there have not been touch or DAV interrupts |
38 | * during the last 40ms which means the pen has been lifted. | |
39 | * | |
ef3b98c2 | 40 | * ESD recovery via a hardware reset is done if the TSC200X doesn't respond |
6ac24381 MW |
41 | * after a configurable period (in ms) of activity. If esd_timeout is 0, the |
42 | * watchdog is disabled. | |
43 | */ | |
44 | ||
ef3b98c2 MW |
45 | static const struct regmap_range tsc200x_writable_ranges[] = { |
46 | regmap_reg_range(TSC200X_REG_AUX_HIGH, TSC200X_REG_CFR2), | |
6ac24381 MW |
47 | }; |
48 | ||
ef3b98c2 MW |
49 | static const struct regmap_access_table tsc200x_writable_table = { |
50 | .yes_ranges = tsc200x_writable_ranges, | |
51 | .n_yes_ranges = ARRAY_SIZE(tsc200x_writable_ranges), | |
6ac24381 MW |
52 | }; |
53 | ||
54 | const struct regmap_config tsc200x_regmap_config = { | |
55 | .reg_bits = 8, | |
56 | .val_bits = 16, | |
57 | .reg_stride = 0x08, | |
58 | .max_register = 0x78, | |
ef3b98c2 MW |
59 | .read_flag_mask = TSC200X_REG_READ, |
60 | .write_flag_mask = TSC200X_REG_PND0, | |
61 | .wr_table = &tsc200x_writable_table, | |
1c96a2f6 DF |
62 | .use_single_read = true, |
63 | .use_single_write = true, | |
6ac24381 MW |
64 | }; |
65 | EXPORT_SYMBOL_GPL(tsc200x_regmap_config); | |
66 | ||
ef3b98c2 | 67 | struct tsc200x_data { |
6ac24381 MW |
68 | u16 x; |
69 | u16 y; | |
70 | u16 z1; | |
71 | u16 z2; | |
72 | } __packed; | |
ef3b98c2 | 73 | #define TSC200X_DATA_REGS 4 |
6ac24381 | 74 | |
ef3b98c2 | 75 | struct tsc200x { |
6ac24381 MW |
76 | struct device *dev; |
77 | struct regmap *regmap; | |
78 | __u16 bustype; | |
79 | ||
80 | struct input_dev *idev; | |
81 | char phys[32]; | |
82 | ||
83 | struct mutex mutex; | |
84 | ||
85 | /* raw copy of previous x,y,z */ | |
86 | int in_x; | |
87 | int in_y; | |
88 | int in_z1; | |
89 | int in_z2; | |
90 | ||
91 | spinlock_t lock; | |
92 | struct timer_list penup_timer; | |
93 | ||
94 | unsigned int esd_timeout; | |
95 | struct delayed_work esd_work; | |
96 | unsigned long last_valid_interrupt; | |
97 | ||
98 | unsigned int x_plate_ohm; | |
99 | ||
100 | bool opened; | |
101 | bool suspended; | |
102 | ||
103 | bool pen_down; | |
104 | ||
105 | struct regulator *vio; | |
106 | ||
107 | struct gpio_desc *reset_gpio; | |
6ac24381 MW |
108 | int (*tsc200x_cmd)(struct device *dev, u8 cmd); |
109 | int irq; | |
110 | }; | |
111 | ||
ef3b98c2 | 112 | static void tsc200x_update_pen_state(struct tsc200x *ts, |
6ac24381 MW |
113 | int x, int y, int pressure) |
114 | { | |
115 | if (pressure) { | |
116 | input_report_abs(ts->idev, ABS_X, x); | |
117 | input_report_abs(ts->idev, ABS_Y, y); | |
118 | input_report_abs(ts->idev, ABS_PRESSURE, pressure); | |
119 | if (!ts->pen_down) { | |
120 | input_report_key(ts->idev, BTN_TOUCH, !!pressure); | |
121 | ts->pen_down = true; | |
122 | } | |
123 | } else { | |
124 | input_report_abs(ts->idev, ABS_PRESSURE, 0); | |
125 | if (ts->pen_down) { | |
126 | input_report_key(ts->idev, BTN_TOUCH, 0); | |
127 | ts->pen_down = false; | |
128 | } | |
129 | } | |
130 | input_sync(ts->idev); | |
131 | dev_dbg(ts->dev, "point(%4d,%4d), pressure (%4d)\n", x, y, | |
132 | pressure); | |
133 | } | |
134 | ||
ef3b98c2 | 135 | static irqreturn_t tsc200x_irq_thread(int irq, void *_ts) |
6ac24381 | 136 | { |
ef3b98c2 | 137 | struct tsc200x *ts = _ts; |
6ac24381 MW |
138 | unsigned long flags; |
139 | unsigned int pressure; | |
ef3b98c2 | 140 | struct tsc200x_data tsdata; |
6ac24381 MW |
141 | int error; |
142 | ||
143 | /* read the coordinates */ | |
ef3b98c2 MW |
144 | error = regmap_bulk_read(ts->regmap, TSC200X_REG_X, &tsdata, |
145 | TSC200X_DATA_REGS); | |
6ac24381 MW |
146 | if (unlikely(error)) |
147 | goto out; | |
148 | ||
149 | /* validate position */ | |
150 | if (unlikely(tsdata.x > MAX_12BIT || tsdata.y > MAX_12BIT)) | |
151 | goto out; | |
152 | ||
153 | /* Skip reading if the pressure components are out of range */ | |
154 | if (unlikely(tsdata.z1 == 0 || tsdata.z2 > MAX_12BIT)) | |
155 | goto out; | |
156 | if (unlikely(tsdata.z1 >= tsdata.z2)) | |
157 | goto out; | |
158 | ||
159 | /* | |
160 | * Skip point if this is a pen down with the exact same values as | |
161 | * the value before pen-up - that implies SPI fed us stale data | |
162 | */ | |
163 | if (!ts->pen_down && | |
164 | ts->in_x == tsdata.x && ts->in_y == tsdata.y && | |
165 | ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) { | |
166 | goto out; | |
167 | } | |
168 | ||
169 | /* | |
170 | * At this point we are happy we have a valid and useful reading. | |
171 | * Remember it for later comparisons. We may now begin downsampling. | |
172 | */ | |
173 | ts->in_x = tsdata.x; | |
174 | ts->in_y = tsdata.y; | |
175 | ts->in_z1 = tsdata.z1; | |
176 | ts->in_z2 = tsdata.z2; | |
177 | ||
178 | /* Compute touch pressure resistance using equation #1 */ | |
179 | pressure = tsdata.x * (tsdata.z2 - tsdata.z1) / tsdata.z1; | |
180 | pressure = pressure * ts->x_plate_ohm / 4096; | |
181 | if (unlikely(pressure > MAX_12BIT)) | |
182 | goto out; | |
183 | ||
184 | spin_lock_irqsave(&ts->lock, flags); | |
185 | ||
ef3b98c2 | 186 | tsc200x_update_pen_state(ts, tsdata.x, tsdata.y, pressure); |
6ac24381 | 187 | mod_timer(&ts->penup_timer, |
ef3b98c2 | 188 | jiffies + msecs_to_jiffies(TSC200X_PENUP_TIME_MS)); |
6ac24381 MW |
189 | |
190 | spin_unlock_irqrestore(&ts->lock, flags); | |
191 | ||
192 | ts->last_valid_interrupt = jiffies; | |
193 | out: | |
194 | return IRQ_HANDLED; | |
195 | } | |
196 | ||
ee03e3f0 | 197 | static void tsc200x_penup_timer(struct timer_list *t) |
6ac24381 | 198 | { |
ee03e3f0 | 199 | struct tsc200x *ts = from_timer(ts, t, penup_timer); |
6ac24381 MW |
200 | unsigned long flags; |
201 | ||
202 | spin_lock_irqsave(&ts->lock, flags); | |
ef3b98c2 | 203 | tsc200x_update_pen_state(ts, 0, 0, 0); |
6ac24381 MW |
204 | spin_unlock_irqrestore(&ts->lock, flags); |
205 | } | |
206 | ||
ef3b98c2 | 207 | static void tsc200x_start_scan(struct tsc200x *ts) |
6ac24381 | 208 | { |
ef3b98c2 MW |
209 | regmap_write(ts->regmap, TSC200X_REG_CFR0, TSC200X_CFR0_INITVALUE); |
210 | regmap_write(ts->regmap, TSC200X_REG_CFR1, TSC200X_CFR1_INITVALUE); | |
211 | regmap_write(ts->regmap, TSC200X_REG_CFR2, TSC200X_CFR2_INITVALUE); | |
212 | ts->tsc200x_cmd(ts->dev, TSC200X_CMD_NORMAL); | |
6ac24381 MW |
213 | } |
214 | ||
ef3b98c2 | 215 | static void tsc200x_stop_scan(struct tsc200x *ts) |
6ac24381 | 216 | { |
ef3b98c2 | 217 | ts->tsc200x_cmd(ts->dev, TSC200X_CMD_STOP); |
6ac24381 MW |
218 | } |
219 | ||
d0d89493 | 220 | static void tsc200x_reset(struct tsc200x *ts) |
6ac24381 | 221 | { |
d0d89493 DT |
222 | if (ts->reset_gpio) { |
223 | gpiod_set_value_cansleep(ts->reset_gpio, 1); | |
224 | usleep_range(100, 500); /* only 10us required */ | |
225 | gpiod_set_value_cansleep(ts->reset_gpio, 0); | |
226 | } | |
6ac24381 MW |
227 | } |
228 | ||
229 | /* must be called with ts->mutex held */ | |
ef3b98c2 | 230 | static void __tsc200x_disable(struct tsc200x *ts) |
6ac24381 | 231 | { |
ef3b98c2 | 232 | tsc200x_stop_scan(ts); |
6ac24381 MW |
233 | |
234 | disable_irq(ts->irq); | |
235 | del_timer_sync(&ts->penup_timer); | |
236 | ||
237 | cancel_delayed_work_sync(&ts->esd_work); | |
238 | ||
239 | enable_irq(ts->irq); | |
240 | } | |
241 | ||
242 | /* must be called with ts->mutex held */ | |
ef3b98c2 | 243 | static void __tsc200x_enable(struct tsc200x *ts) |
6ac24381 | 244 | { |
ef3b98c2 | 245 | tsc200x_start_scan(ts); |
6ac24381 | 246 | |
d0d89493 | 247 | if (ts->esd_timeout && ts->reset_gpio) { |
6ac24381 MW |
248 | ts->last_valid_interrupt = jiffies; |
249 | schedule_delayed_work(&ts->esd_work, | |
250 | round_jiffies_relative( | |
251 | msecs_to_jiffies(ts->esd_timeout))); | |
252 | } | |
253 | } | |
254 | ||
ef3b98c2 | 255 | static ssize_t tsc200x_selftest_show(struct device *dev, |
6ac24381 MW |
256 | struct device_attribute *attr, |
257 | char *buf) | |
258 | { | |
ef3b98c2 | 259 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 MW |
260 | unsigned int temp_high; |
261 | unsigned int temp_high_orig; | |
262 | unsigned int temp_high_test; | |
263 | bool success = true; | |
264 | int error; | |
265 | ||
266 | mutex_lock(&ts->mutex); | |
267 | ||
268 | /* | |
ef3b98c2 | 269 | * Test TSC200X communications via temp high register. |
6ac24381 | 270 | */ |
ef3b98c2 | 271 | __tsc200x_disable(ts); |
6ac24381 | 272 | |
ef3b98c2 | 273 | error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high_orig); |
6ac24381 MW |
274 | if (error) { |
275 | dev_warn(dev, "selftest failed: read error %d\n", error); | |
276 | success = false; | |
277 | goto out; | |
278 | } | |
279 | ||
280 | temp_high_test = (temp_high_orig - 1) & MAX_12BIT; | |
281 | ||
ef3b98c2 | 282 | error = regmap_write(ts->regmap, TSC200X_REG_TEMP_HIGH, temp_high_test); |
6ac24381 MW |
283 | if (error) { |
284 | dev_warn(dev, "selftest failed: write error %d\n", error); | |
285 | success = false; | |
286 | goto out; | |
287 | } | |
288 | ||
ef3b98c2 | 289 | error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high); |
6ac24381 MW |
290 | if (error) { |
291 | dev_warn(dev, "selftest failed: read error %d after write\n", | |
292 | error); | |
293 | success = false; | |
294 | goto out; | |
295 | } | |
296 | ||
297 | if (temp_high != temp_high_test) { | |
298 | dev_warn(dev, "selftest failed: %d != %d\n", | |
299 | temp_high, temp_high_test); | |
300 | success = false; | |
301 | } | |
302 | ||
303 | /* hardware reset */ | |
d0d89493 | 304 | tsc200x_reset(ts); |
6ac24381 MW |
305 | |
306 | if (!success) | |
307 | goto out; | |
308 | ||
309 | /* test that the reset really happened */ | |
ef3b98c2 | 310 | error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high); |
6ac24381 MW |
311 | if (error) { |
312 | dev_warn(dev, "selftest failed: read error %d after reset\n", | |
313 | error); | |
314 | success = false; | |
315 | goto out; | |
316 | } | |
317 | ||
318 | if (temp_high != temp_high_orig) { | |
319 | dev_warn(dev, "selftest failed after reset: %d != %d\n", | |
320 | temp_high, temp_high_orig); | |
321 | success = false; | |
322 | } | |
323 | ||
324 | out: | |
ef3b98c2 | 325 | __tsc200x_enable(ts); |
6ac24381 MW |
326 | mutex_unlock(&ts->mutex); |
327 | ||
328 | return sprintf(buf, "%d\n", success); | |
329 | } | |
330 | ||
ef3b98c2 | 331 | static DEVICE_ATTR(selftest, S_IRUGO, tsc200x_selftest_show, NULL); |
6ac24381 | 332 | |
ef3b98c2 | 333 | static struct attribute *tsc200x_attrs[] = { |
6ac24381 MW |
334 | &dev_attr_selftest.attr, |
335 | NULL | |
336 | }; | |
337 | ||
ef3b98c2 | 338 | static umode_t tsc200x_attr_is_visible(struct kobject *kobj, |
6ac24381 MW |
339 | struct attribute *attr, int n) |
340 | { | |
341 | struct device *dev = container_of(kobj, struct device, kobj); | |
ef3b98c2 | 342 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 MW |
343 | umode_t mode = attr->mode; |
344 | ||
345 | if (attr == &dev_attr_selftest.attr) { | |
d0d89493 | 346 | if (!ts->reset_gpio) |
6ac24381 MW |
347 | mode = 0; |
348 | } | |
349 | ||
350 | return mode; | |
351 | } | |
352 | ||
ef3b98c2 MW |
353 | static const struct attribute_group tsc200x_attr_group = { |
354 | .is_visible = tsc200x_attr_is_visible, | |
355 | .attrs = tsc200x_attrs, | |
6ac24381 MW |
356 | }; |
357 | ||
ef3b98c2 | 358 | static void tsc200x_esd_work(struct work_struct *work) |
6ac24381 | 359 | { |
ef3b98c2 | 360 | struct tsc200x *ts = container_of(work, struct tsc200x, esd_work.work); |
6ac24381 MW |
361 | int error; |
362 | unsigned int r; | |
363 | ||
364 | if (!mutex_trylock(&ts->mutex)) { | |
365 | /* | |
366 | * If the mutex is taken, it means that disable or enable is in | |
367 | * progress. In that case just reschedule the work. If the work | |
368 | * is not needed, it will be canceled by disable. | |
369 | */ | |
370 | goto reschedule; | |
371 | } | |
372 | ||
373 | if (time_is_after_jiffies(ts->last_valid_interrupt + | |
374 | msecs_to_jiffies(ts->esd_timeout))) | |
375 | goto out; | |
376 | ||
377 | /* We should be able to read register without disabling interrupts. */ | |
ef3b98c2 | 378 | error = regmap_read(ts->regmap, TSC200X_REG_CFR0, &r); |
6ac24381 | 379 | if (!error && |
ef3b98c2 | 380 | !((r ^ TSC200X_CFR0_INITVALUE) & TSC200X_CFR0_RW_MASK)) { |
6ac24381 MW |
381 | goto out; |
382 | } | |
383 | ||
384 | /* | |
385 | * If we could not read our known value from configuration register 0 | |
386 | * then we should reset the controller as if from power-up and start | |
387 | * scanning again. | |
388 | */ | |
ef3b98c2 | 389 | dev_info(ts->dev, "TSC200X not responding - resetting\n"); |
6ac24381 MW |
390 | |
391 | disable_irq(ts->irq); | |
392 | del_timer_sync(&ts->penup_timer); | |
393 | ||
ef3b98c2 | 394 | tsc200x_update_pen_state(ts, 0, 0, 0); |
6ac24381 | 395 | |
d0d89493 | 396 | tsc200x_reset(ts); |
6ac24381 MW |
397 | |
398 | enable_irq(ts->irq); | |
ef3b98c2 | 399 | tsc200x_start_scan(ts); |
6ac24381 MW |
400 | |
401 | out: | |
402 | mutex_unlock(&ts->mutex); | |
403 | reschedule: | |
404 | /* re-arm the watchdog */ | |
405 | schedule_delayed_work(&ts->esd_work, | |
406 | round_jiffies_relative( | |
407 | msecs_to_jiffies(ts->esd_timeout))); | |
408 | } | |
409 | ||
ef3b98c2 | 410 | static int tsc200x_open(struct input_dev *input) |
6ac24381 | 411 | { |
ef3b98c2 | 412 | struct tsc200x *ts = input_get_drvdata(input); |
6ac24381 MW |
413 | |
414 | mutex_lock(&ts->mutex); | |
415 | ||
416 | if (!ts->suspended) | |
ef3b98c2 | 417 | __tsc200x_enable(ts); |
6ac24381 MW |
418 | |
419 | ts->opened = true; | |
420 | ||
421 | mutex_unlock(&ts->mutex); | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
ef3b98c2 | 426 | static void tsc200x_close(struct input_dev *input) |
6ac24381 | 427 | { |
ef3b98c2 | 428 | struct tsc200x *ts = input_get_drvdata(input); |
6ac24381 MW |
429 | |
430 | mutex_lock(&ts->mutex); | |
431 | ||
432 | if (!ts->suspended) | |
ef3b98c2 | 433 | __tsc200x_disable(ts); |
6ac24381 MW |
434 | |
435 | ts->opened = false; | |
436 | ||
437 | mutex_unlock(&ts->mutex); | |
438 | } | |
439 | ||
e9003c9c | 440 | int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id, |
6ac24381 MW |
441 | struct regmap *regmap, |
442 | int (*tsc200x_cmd)(struct device *dev, u8 cmd)) | |
443 | { | |
ef3b98c2 | 444 | struct tsc200x *ts; |
6ac24381 | 445 | struct input_dev *input_dev; |
d0d89493 DT |
446 | u32 x_plate_ohm; |
447 | u32 esd_timeout; | |
6ac24381 MW |
448 | int error; |
449 | ||
6ac24381 MW |
450 | if (irq <= 0) { |
451 | dev_err(dev, "no irq\n"); | |
452 | return -ENODEV; | |
453 | } | |
454 | ||
455 | if (IS_ERR(regmap)) | |
456 | return PTR_ERR(regmap); | |
457 | ||
458 | if (!tsc200x_cmd) { | |
459 | dev_err(dev, "no cmd function\n"); | |
460 | return -ENODEV; | |
461 | } | |
462 | ||
6ac24381 MW |
463 | ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); |
464 | if (!ts) | |
465 | return -ENOMEM; | |
466 | ||
467 | input_dev = devm_input_allocate_device(dev); | |
468 | if (!input_dev) | |
469 | return -ENOMEM; | |
470 | ||
471 | ts->irq = irq; | |
472 | ts->dev = dev; | |
473 | ts->idev = input_dev; | |
474 | ts->regmap = regmap; | |
475 | ts->tsc200x_cmd = tsc200x_cmd; | |
d0d89493 DT |
476 | |
477 | error = device_property_read_u32(dev, "ti,x-plate-ohms", &x_plate_ohm); | |
478 | ts->x_plate_ohm = error ? TSC200X_DEF_RESISTOR : x_plate_ohm; | |
479 | ||
480 | error = device_property_read_u32(dev, "ti,esd-recovery-timeout-ms", | |
481 | &esd_timeout); | |
482 | ts->esd_timeout = error ? 0 : esd_timeout; | |
6ac24381 MW |
483 | |
484 | ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); | |
485 | if (IS_ERR(ts->reset_gpio)) { | |
486 | error = PTR_ERR(ts->reset_gpio); | |
487 | dev_err(dev, "error acquiring reset gpio: %d\n", error); | |
488 | return error; | |
489 | } | |
490 | ||
f7bf6f58 | 491 | ts->vio = devm_regulator_get(dev, "vio"); |
6ac24381 MW |
492 | if (IS_ERR(ts->vio)) { |
493 | error = PTR_ERR(ts->vio); | |
f7bf6f58 | 494 | dev_err(dev, "error acquiring vio regulator: %d", error); |
6ac24381 MW |
495 | return error; |
496 | } | |
497 | ||
6ac24381 MW |
498 | mutex_init(&ts->mutex); |
499 | ||
500 | spin_lock_init(&ts->lock); | |
ee03e3f0 | 501 | timer_setup(&ts->penup_timer, tsc200x_penup_timer, 0); |
6ac24381 | 502 | |
ef3b98c2 | 503 | INIT_DELAYED_WORK(&ts->esd_work, tsc200x_esd_work); |
6ac24381 MW |
504 | |
505 | snprintf(ts->phys, sizeof(ts->phys), | |
506 | "%s/input-ts", dev_name(dev)); | |
507 | ||
e9003c9c MW |
508 | if (tsc_id->product == 2004) { |
509 | input_dev->name = "TSC200X touchscreen"; | |
510 | } else { | |
511 | input_dev->name = devm_kasprintf(dev, GFP_KERNEL, | |
512 | "TSC%04d touchscreen", | |
513 | tsc_id->product); | |
514 | if (!input_dev->name) | |
515 | return -ENOMEM; | |
516 | } | |
517 | ||
6ac24381 | 518 | input_dev->phys = ts->phys; |
e9003c9c | 519 | input_dev->id = *tsc_id; |
6ac24381 | 520 | |
ef3b98c2 MW |
521 | input_dev->open = tsc200x_open; |
522 | input_dev->close = tsc200x_close; | |
6ac24381 MW |
523 | |
524 | input_set_drvdata(input_dev, ts); | |
525 | ||
eca25391 | 526 | __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); |
d0d89493 DT |
527 | input_set_capability(input_dev, EV_KEY, BTN_TOUCH); |
528 | ||
529 | input_set_abs_params(input_dev, ABS_X, | |
530 | 0, MAX_12BIT, TSC200X_DEF_X_FUZZ, 0); | |
531 | input_set_abs_params(input_dev, ABS_Y, | |
532 | 0, MAX_12BIT, TSC200X_DEF_Y_FUZZ, 0); | |
533 | input_set_abs_params(input_dev, ABS_PRESSURE, | |
534 | 0, MAX_12BIT, TSC200X_DEF_P_FUZZ, 0); | |
535 | ||
536 | touchscreen_parse_properties(input_dev, false, NULL); | |
537 | ||
6ac24381 | 538 | /* Ensure the touchscreen is off */ |
ef3b98c2 | 539 | tsc200x_stop_scan(ts); |
6ac24381 MW |
540 | |
541 | error = devm_request_threaded_irq(dev, irq, NULL, | |
ef3b98c2 | 542 | tsc200x_irq_thread, |
6ac24381 | 543 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
ef3b98c2 | 544 | "tsc200x", ts); |
6ac24381 MW |
545 | if (error) { |
546 | dev_err(dev, "Failed to request irq, err: %d\n", error); | |
547 | return error; | |
548 | } | |
549 | ||
f7bf6f58 DT |
550 | error = regulator_enable(ts->vio); |
551 | if (error) | |
552 | return error; | |
6ac24381 MW |
553 | |
554 | dev_set_drvdata(dev, ts); | |
ef3b98c2 | 555 | error = sysfs_create_group(&dev->kobj, &tsc200x_attr_group); |
6ac24381 MW |
556 | if (error) { |
557 | dev_err(dev, | |
558 | "Failed to create sysfs attributes, err: %d\n", error); | |
559 | goto disable_regulator; | |
560 | } | |
561 | ||
562 | error = input_register_device(ts->idev); | |
563 | if (error) { | |
564 | dev_err(dev, | |
565 | "Failed to register input device, err: %d\n", error); | |
566 | goto err_remove_sysfs; | |
567 | } | |
568 | ||
569 | irq_set_irq_wake(irq, 1); | |
570 | return 0; | |
571 | ||
572 | err_remove_sysfs: | |
ef3b98c2 | 573 | sysfs_remove_group(&dev->kobj, &tsc200x_attr_group); |
6ac24381 | 574 | disable_regulator: |
f7bf6f58 | 575 | regulator_disable(ts->vio); |
6ac24381 MW |
576 | return error; |
577 | } | |
578 | EXPORT_SYMBOL_GPL(tsc200x_probe); | |
579 | ||
580 | int tsc200x_remove(struct device *dev) | |
581 | { | |
ef3b98c2 | 582 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 | 583 | |
ef3b98c2 | 584 | sysfs_remove_group(&dev->kobj, &tsc200x_attr_group); |
6ac24381 | 585 | |
f7bf6f58 | 586 | regulator_disable(ts->vio); |
6ac24381 MW |
587 | |
588 | return 0; | |
589 | } | |
590 | EXPORT_SYMBOL_GPL(tsc200x_remove); | |
591 | ||
ef3b98c2 | 592 | static int __maybe_unused tsc200x_suspend(struct device *dev) |
6ac24381 | 593 | { |
ef3b98c2 | 594 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 MW |
595 | |
596 | mutex_lock(&ts->mutex); | |
597 | ||
598 | if (!ts->suspended && ts->opened) | |
ef3b98c2 | 599 | __tsc200x_disable(ts); |
6ac24381 MW |
600 | |
601 | ts->suspended = true; | |
602 | ||
603 | mutex_unlock(&ts->mutex); | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
ef3b98c2 | 608 | static int __maybe_unused tsc200x_resume(struct device *dev) |
6ac24381 | 609 | { |
ef3b98c2 | 610 | struct tsc200x *ts = dev_get_drvdata(dev); |
6ac24381 MW |
611 | |
612 | mutex_lock(&ts->mutex); | |
613 | ||
614 | if (ts->suspended && ts->opened) | |
ef3b98c2 | 615 | __tsc200x_enable(ts); |
6ac24381 MW |
616 | |
617 | ts->suspended = false; | |
618 | ||
619 | mutex_unlock(&ts->mutex); | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
ef3b98c2 | 624 | SIMPLE_DEV_PM_OPS(tsc200x_pm_ops, tsc200x_suspend, tsc200x_resume); |
6ac24381 MW |
625 | EXPORT_SYMBOL_GPL(tsc200x_pm_ops); |
626 | ||
627 | MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>"); | |
ef3b98c2 | 628 | MODULE_DESCRIPTION("TSC200x Touchscreen Driver Core"); |
6ac24381 | 629 | MODULE_LICENSE("GPL"); |