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drm/client: Fix drm client endless Kconfig loop
[drm/drm-misc.git] / drivers / input / touchscreen / edt-ft5x06.c
blob0d7bf18e25087ca9a215bf3da1f38bf28800f07b
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
4 * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support)
5 * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
6 * Dario Binacchi <dario.binacchi@amarulasolutions.com> (regmap support)
7 */
8
9 /*
10 * This is a driver for the EDT "Polytouch" family of touch controllers
11 * based on the FocalTech FT5x06 line of chips.
12 *
13 * Development of this driver has been sponsored by Glyn:
14 * http://www.glyn.com/Products/Displays
15 */
16
17 #include <linux/debugfs.h>
18 #include <linux/delay.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/i2c.h>
21 #include <linux/interrupt.h>
22 #include <linux/input.h>
23 #include <linux/input/mt.h>
24 #include <linux/input/touchscreen.h>
25 #include <linux/irq.h>
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/property.h>
29 #include <linux/ratelimit.h>
30 #include <linux/regmap.h>
31 #include <linux/regulator/consumer.h>
32 #include <linux/slab.h>
33 #include <linux/uaccess.h>
34
35 #include <linux/unaligned.h>
36
37 #define WORK_REGISTER_THRESHOLD 0x00
38 #define WORK_REGISTER_REPORT_RATE 0x08
39 #define WORK_REGISTER_GAIN 0x30
40 #define WORK_REGISTER_OFFSET 0x31
41 #define WORK_REGISTER_NUM_X 0x33
42 #define WORK_REGISTER_NUM_Y 0x34
43
44 #define PMOD_REGISTER_ACTIVE 0x00
45 #define PMOD_REGISTER_HIBERNATE 0x03
46
47 #define M09_REGISTER_THRESHOLD 0x80
48 #define M09_REGISTER_GAIN 0x92
49 #define M09_REGISTER_OFFSET 0x93
50 #define M09_REGISTER_NUM_X 0x94
51 #define M09_REGISTER_NUM_Y 0x95
52
53 #define M12_REGISTER_REPORT_RATE 0x88
54
55 #define EV_REGISTER_THRESHOLD 0x40
56 #define EV_REGISTER_GAIN 0x41
57 #define EV_REGISTER_OFFSET_Y 0x45
58 #define EV_REGISTER_OFFSET_X 0x46
59
60 #define NO_REGISTER 0xff
61
62 #define WORK_REGISTER_OPMODE 0x3c
63 #define FACTORY_REGISTER_OPMODE 0x01
64 #define PMOD_REGISTER_OPMODE 0xa5
65
66 #define TOUCH_EVENT_DOWN 0x00
67 #define TOUCH_EVENT_UP 0x01
68 #define TOUCH_EVENT_ON 0x02
69 #define TOUCH_EVENT_RESERVED 0x03
70
71 #define EDT_NAME_LEN 23
72 #define EDT_SWITCH_MODE_RETRIES 10
73 #define EDT_SWITCH_MODE_DELAY 5 /* msec */
74 #define EDT_RAW_DATA_RETRIES 100
75 #define EDT_RAW_DATA_DELAY 1000 /* usec */
76
77 #define EDT_DEFAULT_NUM_X 1024
78 #define EDT_DEFAULT_NUM_Y 1024
79
80 #define M06_REG_CMD(factory) ((factory) ? 0xf3 : 0xfc)
81 #define M06_REG_ADDR(factory, addr) ((factory) ? (addr) & 0x7f : (addr) & 0x3f)
82
83 enum edt_pmode {
84 EDT_PMODE_NOT_SUPPORTED,
85 EDT_PMODE_HIBERNATE,
86 EDT_PMODE_POWEROFF,
87 };
88
89 enum edt_ver {
90 EDT_M06,
91 EDT_M09,
92 EDT_M12,
93 EV_FT,
94 GENERIC_FT,
95 };
96
97 struct edt_reg_addr {
98 int reg_threshold;
99 int reg_report_rate;
100 int reg_gain;
101 int reg_offset;
102 int reg_offset_x;
103 int reg_offset_y;
104 int reg_num_x;
105 int reg_num_y;
106 };
107
108 struct edt_ft5x06_ts_data {
109 struct i2c_client *client;
110 struct input_dev *input;
111 struct touchscreen_properties prop;
112 u16 num_x;
113 u16 num_y;
114 struct regulator *vcc;
115 struct regulator *iovcc;
116
117 struct gpio_desc *reset_gpio;
118 struct gpio_desc *wake_gpio;
119
120 struct regmap *regmap;
121
122 #if defined(CONFIG_DEBUG_FS)
123 struct dentry *debug_dir;
124 u8 *raw_buffer;
125 size_t raw_bufsize;
126 #endif
127
128 struct mutex mutex;
129 bool factory_mode;
130 enum edt_pmode suspend_mode;
131 int threshold;
132 int gain;
133 int offset;
134 int offset_x;
135 int offset_y;
136 int report_rate;
137 int max_support_points;
138 int point_len;
139 u8 tdata_cmd;
140 int tdata_len;
141 int tdata_offset;
142
143 char name[EDT_NAME_LEN];
144 char fw_version[EDT_NAME_LEN];
145
146 struct edt_reg_addr reg_addr;
147 enum edt_ver version;
148 unsigned int crc_errors;
149 unsigned int header_errors;
150 };
151
152 struct edt_i2c_chip_data {
153 int max_support_points;
154 };
155
156 static const struct regmap_config edt_ft5x06_i2c_regmap_config = {
157 .reg_bits = 8,
158 .val_bits = 8,
159 };
160
161 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
162 u8 *buf, int buflen)
163 {
164 int i;
165 u8 crc = 0;
166
167 for (i = 0; i < buflen - 1; i++)
168 crc ^= buf[i];
169
170 if (crc != buf[buflen - 1]) {
171 tsdata->crc_errors++;
172 dev_err_ratelimited(&tsdata->client->dev,
173 "crc error: 0x%02x expected, got 0x%02x\n",
174 crc, buf[buflen - 1]);
175 return false;
176 }
177
178 return true;
179 }
180
181 static int edt_M06_i2c_read(void *context, const void *reg_buf, size_t reg_size,
182 void *val_buf, size_t val_size)
183 {
184 struct device *dev = context;
185 struct i2c_client *i2c = to_i2c_client(dev);
186 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(i2c);
187 struct i2c_msg xfer[2];
188 bool reg_read = false;
189 u8 addr;
190 u8 wlen;
191 u8 wbuf[4], rbuf[3];
192 int ret;
193
194 addr = *((u8 *)reg_buf);
195 wbuf[0] = addr;
196 switch (addr) {
197 case 0xf5:
198 wlen = 3;
199 wbuf[0] = 0xf5;
200 wbuf[1] = 0xe;
201 wbuf[2] = *((u8 *)val_buf);
202 break;
203 case 0xf9:
204 wlen = 1;
205 break;
206 default:
207 wlen = 2;
208 reg_read = true;
209 wbuf[0] = M06_REG_CMD(tsdata->factory_mode);
210 wbuf[1] = M06_REG_ADDR(tsdata->factory_mode, addr);
211 wbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
212 }
213
214 xfer[0].addr = i2c->addr;
215 xfer[0].flags = 0;
216 xfer[0].len = wlen;
217 xfer[0].buf = wbuf;
218
219 xfer[1].addr = i2c->addr;
220 xfer[1].flags = I2C_M_RD;
221 xfer[1].len = reg_read ? 2 : val_size;
222 xfer[1].buf = reg_read ? rbuf : val_buf;
223
224 ret = i2c_transfer(i2c->adapter, xfer, 2);
225 if (ret != 2) {
226 if (ret < 0)
227 return ret;
228
229 return -EIO;
230 }
231
232 if (addr == 0xf9) {
233 u8 *buf = (u8 *)val_buf;
234
235 if (buf[0] != 0xaa || buf[1] != 0xaa ||
236 buf[2] != val_size) {
237 tsdata->header_errors++;
238 dev_err_ratelimited(dev,
239 "Unexpected header: %02x%02x%02x\n",
240 buf[0], buf[1], buf[2]);
241 return -EIO;
242 }
243
244 if (!edt_ft5x06_ts_check_crc(tsdata, val_buf, val_size))
245 return -EIO;
246 } else if (reg_read) {
247 wbuf[2] = rbuf[0];
248 wbuf[3] = rbuf[1];
249 if (!edt_ft5x06_ts_check_crc(tsdata, wbuf, 4))
250 return -EIO;
251
252 *((u8 *)val_buf) = rbuf[0];
253 }
254
255 return 0;
256 }
257
258 static int edt_M06_i2c_write(void *context, const void *data, size_t count)
259 {
260 struct device *dev = context;
261 struct i2c_client *i2c = to_i2c_client(dev);
262 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(i2c);
263 u8 addr, val;
264 u8 wbuf[4];
265 struct i2c_msg xfer;
266 int ret;
267
268 addr = *((u8 *)data);
269 val = *((u8 *)data + 1);
270
271 wbuf[0] = M06_REG_CMD(tsdata->factory_mode);
272 wbuf[1] = M06_REG_ADDR(tsdata->factory_mode, addr);
273 wbuf[2] = val;
274 wbuf[3] = wbuf[0] ^ wbuf[1] ^ wbuf[2];
275
276 xfer.addr = i2c->addr;
277 xfer.flags = 0;
278 xfer.len = 4;
279 xfer.buf = wbuf;
280
281 ret = i2c_transfer(i2c->adapter, &xfer, 1);
282 if (ret != 1) {
283 if (ret < 0)
284 return ret;
285
286 return -EIO;
287 }
288
289 return 0;
290 }
291
292 static const struct regmap_config edt_M06_i2c_regmap_config = {
293 .reg_bits = 8,
294 .val_bits = 8,
295 .read = edt_M06_i2c_read,
296 .write = edt_M06_i2c_write,
297 };
298
299 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
300 {
301 struct edt_ft5x06_ts_data *tsdata = dev_id;
302 struct device *dev = &tsdata->client->dev;
303 u8 rdbuf[63];
304 int i, type, x, y, id;
305 int error;
306
307 memset(rdbuf, 0, sizeof(rdbuf));
308 error = regmap_bulk_read(tsdata->regmap, tsdata->tdata_cmd, rdbuf,
309 tsdata->tdata_len);
310 if (error) {
311 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
312 error);
313 goto out;
314 }
315
316 for (i = 0; i < tsdata->max_support_points; i++) {
317 u8 *buf = &rdbuf[i * tsdata->point_len + tsdata->tdata_offset];
318
319 type = buf[0] >> 6;
320 /* ignore Reserved events */
321 if (type == TOUCH_EVENT_RESERVED)
322 continue;
323
324 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
325 if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN)
326 continue;
327
328 x = get_unaligned_be16(buf) & 0x0fff;
329 y = get_unaligned_be16(buf + 2) & 0x0fff;
330 /* The FT5x26 send the y coordinate first */
331 if (tsdata->version == EV_FT)
332 swap(x, y);
333
334 id = (buf[2] >> 4) & 0x0f;
335
336 input_mt_slot(tsdata->input, id);
337 if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
338 type != TOUCH_EVENT_UP))
339 touchscreen_report_pos(tsdata->input, &tsdata->prop,
340 x, y, true);
341 }
342
343 input_mt_report_pointer_emulation(tsdata->input, true);
344 input_sync(tsdata->input);
345
346 out:
347 return IRQ_HANDLED;
348 }
349
350 struct edt_ft5x06_attribute {
351 struct device_attribute dattr;
352 size_t field_offset;
353 u8 limit_low;
354 u8 limit_high;
355 u8 addr_m06;
356 u8 addr_m09;
357 u8 addr_ev;
358 };
359
360 #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev, \
361 _limit_low, _limit_high) \
362 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
363 .dattr = __ATTR(_field, _mode, \
364 edt_ft5x06_setting_show, \
365 edt_ft5x06_setting_store), \
366 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
367 .addr_m06 = _addr_m06, \
368 .addr_m09 = _addr_m09, \
369 .addr_ev = _addr_ev, \
370 .limit_low = _limit_low, \
371 .limit_high = _limit_high, \
372 }
373
374 static ssize_t edt_ft5x06_setting_show(struct device *dev,
375 struct device_attribute *dattr,
376 char *buf)
377 {
378 struct i2c_client *client = to_i2c_client(dev);
379 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
380 struct edt_ft5x06_attribute *attr =
381 container_of(dattr, struct edt_ft5x06_attribute, dattr);
382 u8 *field = (u8 *)tsdata + attr->field_offset;
383 unsigned int val;
384 size_t count = 0;
385 int error = 0;
386 u8 addr;
387
388 mutex_lock(&tsdata->mutex);
389
390 if (tsdata->factory_mode) {
391 error = -EIO;
392 goto out;
393 }
394
395 switch (tsdata->version) {
396 case EDT_M06:
397 addr = attr->addr_m06;
398 break;
399
400 case EDT_M09:
401 case EDT_M12:
402 case GENERIC_FT:
403 addr = attr->addr_m09;
404 break;
405
406 case EV_FT:
407 addr = attr->addr_ev;
408 break;
409
410 default:
411 error = -ENODEV;
412 goto out;
413 }
414
415 if (addr != NO_REGISTER) {
416 error = regmap_read(tsdata->regmap, addr, &val);
417 if (error) {
418 dev_err(&tsdata->client->dev,
419 "Failed to fetch attribute %s, error %d\n",
420 dattr->attr.name, error);
421 goto out;
422 }
423 } else {
424 val = *field;
425 }
426
427 if (val != *field) {
428 dev_warn(&tsdata->client->dev,
429 "%s: read (%d) and stored value (%d) differ\n",
430 dattr->attr.name, val, *field);
431 *field = val;
432 }
433
434 count = sysfs_emit(buf, "%d\n", val);
435 out:
436 mutex_unlock(&tsdata->mutex);
437 return error ?: count;
438 }
439
440 static ssize_t edt_ft5x06_setting_store(struct device *dev,
441 struct device_attribute *dattr,
442 const char *buf, size_t count)
443 {
444 struct i2c_client *client = to_i2c_client(dev);
445 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
446 struct edt_ft5x06_attribute *attr =
447 container_of(dattr, struct edt_ft5x06_attribute, dattr);
448 u8 *field = (u8 *)tsdata + attr->field_offset;
449 unsigned int val;
450 int error;
451 u8 addr;
452
453 mutex_lock(&tsdata->mutex);
454
455 if (tsdata->factory_mode) {
456 error = -EIO;
457 goto out;
458 }
459
460 error = kstrtouint(buf, 0, &val);
461 if (error)
462 goto out;
463
464 if (val < attr->limit_low || val > attr->limit_high) {
465 error = -ERANGE;
466 goto out;
467 }
468
469 switch (tsdata->version) {
470 case EDT_M06:
471 addr = attr->addr_m06;
472 break;
473
474 case EDT_M09:
475 case EDT_M12:
476 case GENERIC_FT:
477 addr = attr->addr_m09;
478 break;
479
480 case EV_FT:
481 addr = attr->addr_ev;
482 break;
483
484 default:
485 error = -ENODEV;
486 goto out;
487 }
488
489 if (addr != NO_REGISTER) {
490 error = regmap_write(tsdata->regmap, addr, val);
491 if (error) {
492 dev_err(&tsdata->client->dev,
493 "Failed to update attribute %s, error: %d\n",
494 dattr->attr.name, error);
495 goto out;
496 }
497 }
498 *field = val;
499
500 out:
501 mutex_unlock(&tsdata->mutex);
502 return error ?: count;
503 }
504
505 /* m06, m09: range 0-31, m12: range 0-5 */
506 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
507 M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31);
508 /* m06, m09: range 0-31, m12: range 0-16 */
509 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
510 M09_REGISTER_OFFSET, NO_REGISTER, 0, 31);
511 /* m06, m09, m12: no supported, ev_ft: range 0-80 */
512 static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
513 EV_REGISTER_OFFSET_X, 0, 80);
514 /* m06, m09, m12: no supported, ev_ft: range 0-80 */
515 static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
516 EV_REGISTER_OFFSET_Y, 0, 80);
517 /* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */
518 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
519 M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255);
520 /* m06: range 3 to 14, m12: range 1 to 255 */
521 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
522 M12_REGISTER_REPORT_RATE, NO_REGISTER, 0, 255);
523
524 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
525 char *buf)
526 {
527 struct i2c_client *client = to_i2c_client(dev);
528 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
529
530 return sysfs_emit(buf, "%s\n", tsdata->name);
531 }
532
533 static DEVICE_ATTR_RO(model);
534
535 static ssize_t fw_version_show(struct device *dev,
536 struct device_attribute *attr, char *buf)
537 {
538 struct i2c_client *client = to_i2c_client(dev);
539 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
540
541 return sysfs_emit(buf, "%s\n", tsdata->fw_version);
542 }
543
544 static DEVICE_ATTR_RO(fw_version);
545
546 /* m06 only */
547 static ssize_t header_errors_show(struct device *dev,
548 struct device_attribute *attr, char *buf)
549 {
550 struct i2c_client *client = to_i2c_client(dev);
551 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
552
553 return sysfs_emit(buf, "%d\n", tsdata->header_errors);
554 }
555
556 static DEVICE_ATTR_RO(header_errors);
557
558 /* m06 only */
559 static ssize_t crc_errors_show(struct device *dev,
560 struct device_attribute *attr, char *buf)
561 {
562 struct i2c_client *client = to_i2c_client(dev);
563 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
564
565 return sysfs_emit(buf, "%d\n", tsdata->crc_errors);
566 }
567
568 static DEVICE_ATTR_RO(crc_errors);
569
570 static struct attribute *edt_ft5x06_attrs[] = {
571 &edt_ft5x06_attr_gain.dattr.attr,
572 &edt_ft5x06_attr_offset.dattr.attr,
573 &edt_ft5x06_attr_offset_x.dattr.attr,
574 &edt_ft5x06_attr_offset_y.dattr.attr,
575 &edt_ft5x06_attr_threshold.dattr.attr,
576 &edt_ft5x06_attr_report_rate.dattr.attr,
577 &dev_attr_model.attr,
578 &dev_attr_fw_version.attr,
579 &dev_attr_header_errors.attr,
580 &dev_attr_crc_errors.attr,
581 NULL
582 };
583 ATTRIBUTE_GROUPS(edt_ft5x06);
584
585 static void edt_ft5x06_restore_reg_parameters(struct edt_ft5x06_ts_data *tsdata)
586 {
587 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
588 struct regmap *regmap = tsdata->regmap;
589
590 regmap_write(regmap, reg_addr->reg_threshold, tsdata->threshold);
591 regmap_write(regmap, reg_addr->reg_gain, tsdata->gain);
592 if (reg_addr->reg_offset != NO_REGISTER)
593 regmap_write(regmap, reg_addr->reg_offset, tsdata->offset);
594 if (reg_addr->reg_offset_x != NO_REGISTER)
595 regmap_write(regmap, reg_addr->reg_offset_x, tsdata->offset_x);
596 if (reg_addr->reg_offset_y != NO_REGISTER)
597 regmap_write(regmap, reg_addr->reg_offset_y, tsdata->offset_y);
598 if (reg_addr->reg_report_rate != NO_REGISTER)
599 regmap_write(regmap, reg_addr->reg_report_rate,
600 tsdata->report_rate);
601 }
602
603 #ifdef CONFIG_DEBUG_FS
604 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
605 {
606 struct i2c_client *client = tsdata->client;
607 int retries = EDT_SWITCH_MODE_RETRIES;
608 unsigned int val;
609 int error;
610
611 if (tsdata->version != EDT_M06) {
612 dev_err(&client->dev,
613 "No factory mode support for non-M06 devices\n");
614 return -EINVAL;
615 }
616
617 disable_irq(client->irq);
618
619 if (!tsdata->raw_buffer) {
620 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
621 sizeof(u16);
622 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
623 if (!tsdata->raw_buffer) {
624 error = -ENOMEM;
625 goto err_out;
626 }
627 }
628
629 /* mode register is 0x3c when in the work mode */
630 error = regmap_write(tsdata->regmap, WORK_REGISTER_OPMODE, 0x03);
631 if (error) {
632 dev_err(&client->dev,
633 "failed to switch to factory mode, error %d\n", error);
634 goto err_out;
635 }
636
637 tsdata->factory_mode = true;
638 do {
639 mdelay(EDT_SWITCH_MODE_DELAY);
640 /* mode register is 0x01 when in factory mode */
641 error = regmap_read(tsdata->regmap, FACTORY_REGISTER_OPMODE,
642 &val);
643 if (!error && val == 0x03)
644 break;
645 } while (--retries > 0);
646
647 if (retries == 0) {
648 dev_err(&client->dev, "not in factory mode after %dms.\n",
649 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
650 error = -EIO;
651 goto err_out;
652 }
653
654 return 0;
655
656 err_out:
657 kfree(tsdata->raw_buffer);
658 tsdata->raw_buffer = NULL;
659 tsdata->factory_mode = false;
660 enable_irq(client->irq);
661
662 return error;
663 }
664
665 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
666 {
667 struct i2c_client *client = tsdata->client;
668 int retries = EDT_SWITCH_MODE_RETRIES;
669 unsigned int val;
670 int error;
671
672 /* mode register is 0x01 when in the factory mode */
673 error = regmap_write(tsdata->regmap, FACTORY_REGISTER_OPMODE, 0x1);
674 if (error) {
675 dev_err(&client->dev,
676 "failed to switch to work mode, error: %d\n", error);
677 return error;
678 }
679
680 tsdata->factory_mode = false;
681
682 do {
683 mdelay(EDT_SWITCH_MODE_DELAY);
684 /* mode register is 0x01 when in factory mode */
685 error = regmap_read(tsdata->regmap, WORK_REGISTER_OPMODE, &val);
686 if (!error && val == 0x01)
687 break;
688 } while (--retries > 0);
689
690 if (retries == 0) {
691 dev_err(&client->dev, "not in work mode after %dms.\n",
692 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
693 tsdata->factory_mode = true;
694 return -EIO;
695 }
696
697 kfree(tsdata->raw_buffer);
698 tsdata->raw_buffer = NULL;
699
700 edt_ft5x06_restore_reg_parameters(tsdata);
701 enable_irq(client->irq);
702
703 return 0;
704 }
705
706 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
707 {
708 struct edt_ft5x06_ts_data *tsdata = data;
709
710 *mode = tsdata->factory_mode;
711
712 return 0;
713 };
714
715 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
716 {
717 struct edt_ft5x06_ts_data *tsdata = data;
718 int retval = 0;
719
720 if (mode > 1)
721 return -ERANGE;
722
723 mutex_lock(&tsdata->mutex);
724
725 if (mode != tsdata->factory_mode) {
726 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
727 edt_ft5x06_work_mode(tsdata);
728 }
729
730 mutex_unlock(&tsdata->mutex);
731
732 return retval;
733 };
734
735 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
736 edt_ft5x06_debugfs_mode_set, "%llu\n");
737
738 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
739 char __user *buf, size_t count,
740 loff_t *off)
741 {
742 struct edt_ft5x06_ts_data *tsdata = file->private_data;
743 struct i2c_client *client = tsdata->client;
744 int retries = EDT_RAW_DATA_RETRIES;
745 unsigned int val;
746 int i, error;
747 size_t read = 0;
748 int colbytes;
749 u8 *rdbuf;
750
751 if (*off < 0 || *off >= tsdata->raw_bufsize)
752 return 0;
753
754 mutex_lock(&tsdata->mutex);
755
756 if (!tsdata->factory_mode || !tsdata->raw_buffer) {
757 error = -EIO;
758 goto out;
759 }
760
761 error = regmap_write(tsdata->regmap, 0x08, 0x01);
762 if (error) {
763 dev_err(&client->dev,
764 "failed to write 0x08 register, error %d\n", error);
765 goto out;
766 }
767
768 do {
769 usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100);
770 error = regmap_read(tsdata->regmap, 0x08, &val);
771 if (error) {
772 dev_err(&client->dev,
773 "failed to read 0x08 register, error %d\n",
774 error);
775 goto out;
776 }
777
778 if (val == 1)
779 break;
780 } while (--retries > 0);
781
782 if (retries == 0) {
783 dev_err(&client->dev,
784 "timed out waiting for register to settle\n");
785 error = -ETIMEDOUT;
786 goto out;
787 }
788
789 rdbuf = tsdata->raw_buffer;
790 colbytes = tsdata->num_y * sizeof(u16);
791
792 for (i = 0; i < tsdata->num_x; i++) {
793 rdbuf[0] = i; /* column index */
794 error = regmap_bulk_read(tsdata->regmap, 0xf5, rdbuf, colbytes);
795 if (error)
796 goto out;
797
798 rdbuf += colbytes;
799 }
800
801 read = min_t(size_t, count, tsdata->raw_bufsize - *off);
802 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
803 error = -EFAULT;
804 goto out;
805 }
806
807 *off += read;
808 out:
809 mutex_unlock(&tsdata->mutex);
810 return error ?: read;
811 };
812
813 static const struct file_operations debugfs_raw_data_fops = {
814 .open = simple_open,
815 .read = edt_ft5x06_debugfs_raw_data_read,
816 };
817
818 static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
819 const char *debugfs_name)
820 {
821 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
822
823 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
824 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
825
826 debugfs_create_file("mode", S_IRUSR | S_IWUSR,
827 tsdata->debug_dir, tsdata, &debugfs_mode_fops);
828 debugfs_create_file("raw_data", S_IRUSR,
829 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
830 }
831
832 static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
833 {
834 debugfs_remove_recursive(tsdata->debug_dir);
835 kfree(tsdata->raw_buffer);
836 }
837
838 #else
839
840 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
841 {
842 return -ENOSYS;
843 }
844
845 static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
846 const char *debugfs_name)
847 {
848 }
849
850 static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
851 {
852 }
853
854 #endif /* CONFIG_DEBUGFS */
855
856 static int edt_ft5x06_ts_identify(struct i2c_client *client,
857 struct edt_ft5x06_ts_data *tsdata)
858 {
859 u8 rdbuf[EDT_NAME_LEN];
860 char *p;
861 int error;
862 char *model_name = tsdata->name;
863 char *fw_version = tsdata->fw_version;
864
865 /* see what we find if we assume it is a M06 *
866 * if we get less than EDT_NAME_LEN, we don't want
867 * to have garbage in there
868 */
869 memset(rdbuf, 0, sizeof(rdbuf));
870 error = regmap_bulk_read(tsdata->regmap, 0xBB, rdbuf, EDT_NAME_LEN - 1);
871 if (error)
872 return error;
873
874 /* Probe content for something consistent.
875 * M06 starts with a response byte, M12 gives the data directly.
876 * M09/Generic does not provide model number information.
877 */
878 if (!strncasecmp(rdbuf + 1, "EP0", 3)) {
879 tsdata->version = EDT_M06;
880
881 /* remove last '$' end marker */
882 rdbuf[EDT_NAME_LEN - 1] = '\0';
883 if (rdbuf[EDT_NAME_LEN - 2] == '$')
884 rdbuf[EDT_NAME_LEN - 2] = '\0';
885
886 /* look for Model/Version separator */
887 p = strchr(rdbuf, '*');
888 if (p)
889 *p++ = '\0';
890 strscpy(model_name, rdbuf + 1, EDT_NAME_LEN);
891 strscpy(fw_version, p ? p : "", EDT_NAME_LEN);
892
893 regmap_exit(tsdata->regmap);
894 tsdata->regmap = regmap_init_i2c(client,
895 &edt_M06_i2c_regmap_config);
896 if (IS_ERR(tsdata->regmap)) {
897 dev_err(&client->dev, "regmap allocation failed\n");
898 return PTR_ERR(tsdata->regmap);
899 }
900 } else if (!strncasecmp(rdbuf, "EP0", 3)) {
901 tsdata->version = EDT_M12;
902
903 /* remove last '$' end marker */
904 rdbuf[EDT_NAME_LEN - 2] = '\0';
905 if (rdbuf[EDT_NAME_LEN - 3] == '$')
906 rdbuf[EDT_NAME_LEN - 3] = '\0';
907
908 /* look for Model/Version separator */
909 p = strchr(rdbuf, '*');
910 if (p)
911 *p++ = '\0';
912 strscpy(model_name, rdbuf, EDT_NAME_LEN);
913 strscpy(fw_version, p ? p : "", EDT_NAME_LEN);
914 } else {
915 /* If it is not an EDT M06/M12 touchscreen, then the model
916 * detection is a bit hairy. The different ft5x06
917 * firmwares around don't reliably implement the
918 * identification registers. Well, we'll take a shot.
919 *
920 * The main difference between generic focaltec based
921 * touches and EDT M09 is that we know how to retrieve
922 * the max coordinates for the latter.
923 */
924 tsdata->version = GENERIC_FT;
925
926 error = regmap_bulk_read(tsdata->regmap, 0xA6, rdbuf, 2);
927 if (error)
928 return error;
929
930 strscpy(fw_version, rdbuf, 2);
931
932 error = regmap_bulk_read(tsdata->regmap, 0xA8, rdbuf, 1);
933 if (error)
934 return error;
935
936 /* This "model identification" is not exact. Unfortunately
937 * not all firmwares for the ft5x06 put useful values in
938 * the identification registers.
939 */
940 switch (rdbuf[0]) {
941 case 0x11: /* EDT EP0110M09 */
942 case 0x35: /* EDT EP0350M09 */
943 case 0x43: /* EDT EP0430M09 */
944 case 0x50: /* EDT EP0500M09 */
945 case 0x57: /* EDT EP0570M09 */
946 case 0x70: /* EDT EP0700M09 */
947 tsdata->version = EDT_M09;
948 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
949 rdbuf[0] >> 4, rdbuf[0] & 0x0F);
950 break;
951 case 0xa1: /* EDT EP1010ML00 */
952 tsdata->version = EDT_M09;
953 snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00",
954 rdbuf[0] >> 4, rdbuf[0] & 0x0F);
955 break;
956 case 0x5a: /* Solomon Goldentek Display */
957 snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0");
958 break;
959 case 0x59: /* Evervision Display with FT5xx6 TS */
960 tsdata->version = EV_FT;
961 error = regmap_bulk_read(tsdata->regmap, 0x53, rdbuf, 1);
962 if (error)
963 return error;
964 strscpy(fw_version, rdbuf, 1);
965 snprintf(model_name, EDT_NAME_LEN,
966 "EVERVISION-FT5726NEi");
967 break;
968 default:
969 snprintf(model_name, EDT_NAME_LEN,
970 "generic ft5x06 (%02x)",
971 rdbuf[0]);
972 break;
973 }
974 }
975
976 return 0;
977 }
978
979 static void edt_ft5x06_ts_get_defaults(struct device *dev,
980 struct edt_ft5x06_ts_data *tsdata)
981 {
982 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
983 struct regmap *regmap = tsdata->regmap;
984 u32 val;
985 int error;
986
987 error = device_property_read_u32(dev, "threshold", &val);
988 if (!error) {
989 regmap_write(regmap, reg_addr->reg_threshold, val);
990 tsdata->threshold = val;
991 }
992
993 error = device_property_read_u32(dev, "gain", &val);
994 if (!error) {
995 regmap_write(regmap, reg_addr->reg_gain, val);
996 tsdata->gain = val;
997 }
998
999 error = device_property_read_u32(dev, "offset", &val);
1000 if (!error) {
1001 if (reg_addr->reg_offset != NO_REGISTER)
1002 regmap_write(regmap, reg_addr->reg_offset, val);
1003 tsdata->offset = val;
1004 }
1005
1006 error = device_property_read_u32(dev, "offset-x", &val);
1007 if (!error) {
1008 if (reg_addr->reg_offset_x != NO_REGISTER)
1009 regmap_write(regmap, reg_addr->reg_offset_x, val);
1010 tsdata->offset_x = val;
1011 }
1012
1013 error = device_property_read_u32(dev, "offset-y", &val);
1014 if (!error) {
1015 if (reg_addr->reg_offset_y != NO_REGISTER)
1016 regmap_write(regmap, reg_addr->reg_offset_y, val);
1017 tsdata->offset_y = val;
1018 }
1019 }
1020
1021 static void edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
1022 {
1023 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
1024 struct regmap *regmap = tsdata->regmap;
1025 unsigned int val;
1026
1027 regmap_read(regmap, reg_addr->reg_threshold, &tsdata->threshold);
1028 regmap_read(regmap, reg_addr->reg_gain, &tsdata->gain);
1029 if (reg_addr->reg_offset != NO_REGISTER)
1030 regmap_read(regmap, reg_addr->reg_offset, &tsdata->offset);
1031 if (reg_addr->reg_offset_x != NO_REGISTER)
1032 regmap_read(regmap, reg_addr->reg_offset_x, &tsdata->offset_x);
1033 if (reg_addr->reg_offset_y != NO_REGISTER)
1034 regmap_read(regmap, reg_addr->reg_offset_y, &tsdata->offset_y);
1035 if (reg_addr->reg_report_rate != NO_REGISTER)
1036 regmap_read(regmap, reg_addr->reg_report_rate,
1037 &tsdata->report_rate);
1038 tsdata->num_x = EDT_DEFAULT_NUM_X;
1039 if (reg_addr->reg_num_x != NO_REGISTER) {
1040 if (!regmap_read(regmap, reg_addr->reg_num_x, &val))
1041 tsdata->num_x = val;
1042 }
1043 tsdata->num_y = EDT_DEFAULT_NUM_Y;
1044 if (reg_addr->reg_num_y != NO_REGISTER) {
1045 if (!regmap_read(regmap, reg_addr->reg_num_y, &val))
1046 tsdata->num_y = val;
1047 }
1048 }
1049
1050 static void edt_ft5x06_ts_set_tdata_parameters(struct edt_ft5x06_ts_data *tsdata)
1051 {
1052 int crclen;
1053
1054 if (tsdata->version == EDT_M06) {
1055 tsdata->tdata_cmd = 0xf9;
1056 tsdata->tdata_offset = 5;
1057 tsdata->point_len = 4;
1058 crclen = 1;
1059 } else {
1060 tsdata->tdata_cmd = 0x0;
1061 tsdata->tdata_offset = 3;
1062 tsdata->point_len = 6;
1063 crclen = 0;
1064 }
1065
1066 tsdata->tdata_len = tsdata->point_len * tsdata->max_support_points +
1067 tsdata->tdata_offset + crclen;
1068 }
1069
1070 static void edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
1071 {
1072 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
1073
1074 switch (tsdata->version) {
1075 case EDT_M06:
1076 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
1077 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
1078 reg_addr->reg_gain = WORK_REGISTER_GAIN;
1079 reg_addr->reg_offset = WORK_REGISTER_OFFSET;
1080 reg_addr->reg_offset_x = NO_REGISTER;
1081 reg_addr->reg_offset_y = NO_REGISTER;
1082 reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
1083 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
1084 break;
1085
1086 case EDT_M09:
1087 case EDT_M12:
1088 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
1089 reg_addr->reg_report_rate = tsdata->version == EDT_M12 ?
1090 M12_REGISTER_REPORT_RATE : NO_REGISTER;
1091 reg_addr->reg_gain = M09_REGISTER_GAIN;
1092 reg_addr->reg_offset = M09_REGISTER_OFFSET;
1093 reg_addr->reg_offset_x = NO_REGISTER;
1094 reg_addr->reg_offset_y = NO_REGISTER;
1095 reg_addr->reg_num_x = M09_REGISTER_NUM_X;
1096 reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
1097 break;
1098
1099 case EV_FT:
1100 reg_addr->reg_threshold = EV_REGISTER_THRESHOLD;
1101 reg_addr->reg_report_rate = NO_REGISTER;
1102 reg_addr->reg_gain = EV_REGISTER_GAIN;
1103 reg_addr->reg_offset = NO_REGISTER;
1104 reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X;
1105 reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y;
1106 reg_addr->reg_num_x = NO_REGISTER;
1107 reg_addr->reg_num_y = NO_REGISTER;
1108 break;
1109
1110 case GENERIC_FT:
1111 /* this is a guesswork */
1112 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
1113 reg_addr->reg_report_rate = NO_REGISTER;
1114 reg_addr->reg_gain = M09_REGISTER_GAIN;
1115 reg_addr->reg_offset = M09_REGISTER_OFFSET;
1116 reg_addr->reg_offset_x = NO_REGISTER;
1117 reg_addr->reg_offset_y = NO_REGISTER;
1118 reg_addr->reg_num_x = NO_REGISTER;
1119 reg_addr->reg_num_y = NO_REGISTER;
1120 break;
1121 }
1122 }
1123
1124 static void edt_ft5x06_exit_regmap(void *arg)
1125 {
1126 struct edt_ft5x06_ts_data *data = arg;
1127
1128 if (!IS_ERR_OR_NULL(data->regmap))
1129 regmap_exit(data->regmap);
1130 }
1131
1132 static void edt_ft5x06_disable_regulators(void *arg)
1133 {
1134 struct edt_ft5x06_ts_data *data = arg;
1135
1136 regulator_disable(data->vcc);
1137 regulator_disable(data->iovcc);
1138 }
1139
1140 static int edt_ft5x06_ts_probe(struct i2c_client *client)
1141 {
1142 const struct i2c_device_id *id = i2c_client_get_device_id(client);
1143 const struct edt_i2c_chip_data *chip_data;
1144 struct edt_ft5x06_ts_data *tsdata;
1145 unsigned int val;
1146 struct input_dev *input;
1147 unsigned long irq_flags;
1148 int error;
1149 u32 report_rate;
1150
1151 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
1152
1153 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
1154 if (!tsdata) {
1155 dev_err(&client->dev, "failed to allocate driver data.\n");
1156 return -ENOMEM;
1157 }
1158
1159 tsdata->regmap = regmap_init_i2c(client, &edt_ft5x06_i2c_regmap_config);
1160 if (IS_ERR(tsdata->regmap)) {
1161 dev_err(&client->dev, "regmap allocation failed\n");
1162 return PTR_ERR(tsdata->regmap);
1163 }
1164
1165 /*
1166 * We are not using devm_regmap_init_i2c() and instead install a
1167 * custom action because we may replace regmap with M06-specific one
1168 * and we need to make sure that it will not be released too early.
1169 */
1170 error = devm_add_action_or_reset(&client->dev, edt_ft5x06_exit_regmap,
1171 tsdata);
1172 if (error)
1173 return error;
1174
1175 chip_data = device_get_match_data(&client->dev);
1176 if (!chip_data)
1177 chip_data = (const struct edt_i2c_chip_data *)id->driver_data;
1178 if (!chip_data || !chip_data->max_support_points) {
1179 dev_err(&client->dev, "invalid or missing chip data\n");
1180 return -EINVAL;
1181 }
1182
1183 tsdata->max_support_points = chip_data->max_support_points;
1184
1185 tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
1186 if (IS_ERR(tsdata->vcc))
1187 return dev_err_probe(&client->dev, PTR_ERR(tsdata->vcc),
1188 "failed to request regulator\n");
1189
1190 tsdata->iovcc = devm_regulator_get(&client->dev, "iovcc");
1191 if (IS_ERR(tsdata->iovcc)) {
1192 error = PTR_ERR(tsdata->iovcc);
1193 if (error != -EPROBE_DEFER)
1194 dev_err(&client->dev,
1195 "failed to request iovcc regulator: %d\n", error);
1196 return error;
1197 }
1198
1199 error = regulator_enable(tsdata->iovcc);
1200 if (error < 0) {
1201 dev_err(&client->dev, "failed to enable iovcc: %d\n", error);
1202 return error;
1203 }
1204
1205 /* Delay enabling VCC for > 10us (T_ivd) after IOVCC */
1206 usleep_range(10, 100);
1207
1208 error = regulator_enable(tsdata->vcc);
1209 if (error < 0) {
1210 dev_err(&client->dev, "failed to enable vcc: %d\n", error);
1211 regulator_disable(tsdata->iovcc);
1212 return error;
1213 }
1214
1215 error = devm_add_action_or_reset(&client->dev,
1216 edt_ft5x06_disable_regulators,
1217 tsdata);
1218 if (error)
1219 return error;
1220
1221 tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
1222 "reset", GPIOD_OUT_HIGH);
1223 if (IS_ERR(tsdata->reset_gpio)) {
1224 error = PTR_ERR(tsdata->reset_gpio);
1225 dev_err(&client->dev,
1226 "Failed to request GPIO reset pin, error %d\n", error);
1227 return error;
1228 }
1229
1230 tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
1231 "wake", GPIOD_OUT_LOW);
1232 if (IS_ERR(tsdata->wake_gpio)) {
1233 error = PTR_ERR(tsdata->wake_gpio);
1234 dev_err(&client->dev,
1235 "Failed to request GPIO wake pin, error %d\n", error);
1236 return error;
1237 }
1238
1239 /*
1240 * Check which sleep modes we can support. Power-off requires the
1241 * reset-pin to ensure correct power-down/power-up behaviour. Start with
1242 * the EDT_PMODE_POWEROFF test since this is the deepest possible sleep
1243 * mode.
1244 */
1245 if (tsdata->reset_gpio)
1246 tsdata->suspend_mode = EDT_PMODE_POWEROFF;
1247 else if (tsdata->wake_gpio)
1248 tsdata->suspend_mode = EDT_PMODE_HIBERNATE;
1249 else
1250 tsdata->suspend_mode = EDT_PMODE_NOT_SUPPORTED;
1251
1252 if (tsdata->wake_gpio) {
1253 usleep_range(5000, 6000);
1254 gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
1255 usleep_range(5000, 6000);
1256 }
1257
1258 if (tsdata->reset_gpio) {
1259 usleep_range(5000, 6000);
1260 gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
1261 msleep(300);
1262 }
1263
1264 input = devm_input_allocate_device(&client->dev);
1265 if (!input) {
1266 dev_err(&client->dev, "failed to allocate input device.\n");
1267 return -ENOMEM;
1268 }
1269
1270 mutex_init(&tsdata->mutex);
1271 tsdata->client = client;
1272 tsdata->input = input;
1273 tsdata->factory_mode = false;
1274 i2c_set_clientdata(client, tsdata);
1275
1276 error = edt_ft5x06_ts_identify(client, tsdata);
1277 if (error) {
1278 dev_err(&client->dev, "touchscreen probe failed\n");
1279 return error;
1280 }
1281
1282 /*
1283 * Dummy read access. EP0700MLP1 returns bogus data on the first
1284 * register read access and ignores writes.
1285 */
1286 regmap_read(tsdata->regmap, 0x00, &val);
1287
1288 edt_ft5x06_ts_set_tdata_parameters(tsdata);
1289 edt_ft5x06_ts_set_regs(tsdata);
1290 edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
1291 edt_ft5x06_ts_get_parameters(tsdata);
1292
1293 if (tsdata->reg_addr.reg_report_rate != NO_REGISTER &&
1294 !device_property_read_u32(&client->dev,
1295 "report-rate-hz", &report_rate)) {
1296 if (tsdata->version == EDT_M06)
1297 tsdata->report_rate = clamp_val(report_rate, 30, 140);
1298 else
1299 tsdata->report_rate = clamp_val(report_rate, 1, 255);
1300
1301 if (report_rate != tsdata->report_rate)
1302 dev_warn(&client->dev,
1303 "report-rate %dHz is unsupported, use %dHz\n",
1304 report_rate, tsdata->report_rate);
1305
1306 if (tsdata->version == EDT_M06)
1307 tsdata->report_rate /= 10;
1308
1309 regmap_write(tsdata->regmap, tsdata->reg_addr.reg_report_rate,
1310 tsdata->report_rate);
1311 }
1312
1313 dev_dbg(&client->dev,
1314 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
1315 tsdata->name, tsdata->fw_version, tsdata->num_x, tsdata->num_y);
1316
1317 input->name = tsdata->name;
1318 input->id.bustype = BUS_I2C;
1319 input->dev.parent = &client->dev;
1320
1321 input_set_abs_params(input, ABS_MT_POSITION_X,
1322 0, tsdata->num_x * 64 - 1, 0, 0);
1323 input_set_abs_params(input, ABS_MT_POSITION_Y,
1324 0, tsdata->num_y * 64 - 1, 0, 0);
1325
1326 touchscreen_parse_properties(input, true, &tsdata->prop);
1327
1328 error = input_mt_init_slots(input, tsdata->max_support_points,
1329 INPUT_MT_DIRECT);
1330 if (error) {
1331 dev_err(&client->dev, "Unable to init MT slots.\n");
1332 return error;
1333 }
1334
1335 irq_flags = irq_get_trigger_type(client->irq);
1336 if (irq_flags == IRQF_TRIGGER_NONE)
1337 irq_flags = IRQF_TRIGGER_FALLING;
1338 irq_flags |= IRQF_ONESHOT;
1339
1340 error = devm_request_threaded_irq(&client->dev, client->irq,
1341 NULL, edt_ft5x06_ts_isr, irq_flags,
1342 client->name, tsdata);
1343 if (error) {
1344 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
1345 return error;
1346 }
1347
1348 error = input_register_device(input);
1349 if (error)
1350 return error;
1351
1352 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1353
1354 dev_dbg(&client->dev,
1355 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
1356 client->irq,
1357 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1,
1358 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
1359
1360 return 0;
1361 }
1362
1363 static void edt_ft5x06_ts_remove(struct i2c_client *client)
1364 {
1365 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1366
1367 edt_ft5x06_ts_teardown_debugfs(tsdata);
1368 }
1369
1370 static int edt_ft5x06_ts_suspend(struct device *dev)
1371 {
1372 struct i2c_client *client = to_i2c_client(dev);
1373 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1374 struct gpio_desc *reset_gpio = tsdata->reset_gpio;
1375 int ret;
1376
1377 if (device_may_wakeup(dev))
1378 return 0;
1379
1380 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED)
1381 return 0;
1382
1383 /* Enter hibernate mode. */
1384 ret = regmap_write(tsdata->regmap, PMOD_REGISTER_OPMODE,
1385 PMOD_REGISTER_HIBERNATE);
1386 if (ret)
1387 dev_warn(dev, "Failed to set hibernate mode\n");
1388
1389 if (tsdata->suspend_mode == EDT_PMODE_HIBERNATE)
1390 return 0;
1391
1392 /*
1393 * Power-off according the datasheet. Cut the power may leaf the irq
1394 * line in an undefined state depending on the host pull resistor
1395 * settings. Disable the irq to avoid adjusting each host till the
1396 * device is back in a full functional state.
1397 */
1398 disable_irq(tsdata->client->irq);
1399
1400 gpiod_set_value_cansleep(reset_gpio, 1);
1401 usleep_range(1000, 2000);
1402
1403 ret = regulator_disable(tsdata->vcc);
1404 if (ret)
1405 dev_warn(dev, "Failed to disable vcc\n");
1406 ret = regulator_disable(tsdata->iovcc);
1407 if (ret)
1408 dev_warn(dev, "Failed to disable iovcc\n");
1409
1410 return 0;
1411 }
1412
1413 static int edt_ft5x06_ts_resume(struct device *dev)
1414 {
1415 struct i2c_client *client = to_i2c_client(dev);
1416 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1417 int ret = 0;
1418
1419 if (device_may_wakeup(dev))
1420 return 0;
1421
1422 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED)
1423 return 0;
1424
1425 if (tsdata->suspend_mode == EDT_PMODE_POWEROFF) {
1426 struct gpio_desc *reset_gpio = tsdata->reset_gpio;
1427
1428 /*
1429 * We can't check if the regulator is a dummy or a real
1430 * regulator. So we need to specify the 5ms reset time (T_rst)
1431 * here instead of the 100us T_rtp time. We also need to wait
1432 * 300ms in case it was a real supply and the power was cutted
1433 * of. Toggle the reset pin is also a way to exit the hibernate
1434 * mode.
1435 */
1436 gpiod_set_value_cansleep(reset_gpio, 1);
1437 usleep_range(5000, 6000);
1438
1439 ret = regulator_enable(tsdata->iovcc);
1440 if (ret) {
1441 dev_err(dev, "Failed to enable iovcc\n");
1442 return ret;
1443 }
1444
1445 /* Delay enabling VCC for > 10us (T_ivd) after IOVCC */
1446 usleep_range(10, 100);
1447
1448 ret = regulator_enable(tsdata->vcc);
1449 if (ret) {
1450 dev_err(dev, "Failed to enable vcc\n");
1451 regulator_disable(tsdata->iovcc);
1452 return ret;
1453 }
1454
1455 usleep_range(1000, 2000);
1456 gpiod_set_value_cansleep(reset_gpio, 0);
1457 msleep(300);
1458
1459 edt_ft5x06_restore_reg_parameters(tsdata);
1460 enable_irq(tsdata->client->irq);
1461
1462 if (tsdata->factory_mode)
1463 ret = edt_ft5x06_factory_mode(tsdata);
1464 } else {
1465 struct gpio_desc *wake_gpio = tsdata->wake_gpio;
1466
1467 gpiod_set_value_cansleep(wake_gpio, 0);
1468 usleep_range(5000, 6000);
1469 gpiod_set_value_cansleep(wake_gpio, 1);
1470 }
1471
1472 return ret;
1473 }
1474
1475 static DEFINE_SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
1476 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
1477
1478 static const struct edt_i2c_chip_data edt_ft5x06_data = {
1479 .max_support_points = 5,
1480 };
1481
1482 static const struct edt_i2c_chip_data edt_ft5452_data = {
1483 .max_support_points = 5,
1484 };
1485
1486 static const struct edt_i2c_chip_data edt_ft5506_data = {
1487 .max_support_points = 10,
1488 };
1489
1490 static const struct edt_i2c_chip_data edt_ft6236_data = {
1491 .max_support_points = 2,
1492 };
1493
1494 static const struct edt_i2c_chip_data edt_ft8201_data = {
1495 .max_support_points = 10,
1496 };
1497
1498 static const struct edt_i2c_chip_data edt_ft8719_data = {
1499 .max_support_points = 10,
1500 };
1501
1502 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1503 { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },
1504 { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data },
1505 { .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data },
1506 { .name = "ft5452", .driver_data = (long)&edt_ft5452_data },
1507 /* Note no edt- prefix for compatibility with the ft6236.c driver */
1508 { .name = "ft6236", .driver_data = (long)&edt_ft6236_data },
1509 { .name = "ft8201", .driver_data = (long)&edt_ft8201_data },
1510 { .name = "ft8719", .driver_data = (long)&edt_ft8719_data },
1511 { /* sentinel */ }
1512 };
1513 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1514
1515 static const struct of_device_id edt_ft5x06_of_match[] = {
1516 { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data },
1517 { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data },
1518 { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
1519 { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
1520 { .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data },
1521 { .compatible = "focaltech,ft5426", .data = &edt_ft5506_data },
1522 { .compatible = "focaltech,ft5452", .data = &edt_ft5452_data },
1523 /* Note focaltech vendor prefix for compatibility with ft6236.c */
1524 { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },
1525 { .compatible = "focaltech,ft8201", .data = &edt_ft8201_data },
1526 { .compatible = "focaltech,ft8719", .data = &edt_ft8719_data },
1527 { /* sentinel */ }
1528 };
1529 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1530
1531 static struct i2c_driver edt_ft5x06_ts_driver = {
1532 .driver = {
1533 .name = "edt_ft5x06",
1534 .dev_groups = edt_ft5x06_groups,
1535 .of_match_table = edt_ft5x06_of_match,
1536 .pm = pm_sleep_ptr(&edt_ft5x06_ts_pm_ops),
1537 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1538 },
1539 .id_table = edt_ft5x06_ts_id,
1540 .probe = edt_ft5x06_ts_probe,
1541 .remove = edt_ft5x06_ts_remove,
1542 };
1543
1544 module_i2c_driver(edt_ft5x06_ts_driver);
1545
1546 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
1547 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1548 MODULE_LICENSE("GPL v2");
Kernel DRM miscellaneous fixes and cross-tree changes