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1/*
2 * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
3 * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support)
4 * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
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/*
21 * This is a driver for the EDT "Polytouch" family of touch controllers
22 * based on the FocalTech FT5x06 line of chips.
23 *
24 * Development of this driver has been sponsored by Glyn:
25 * http://www.glyn.com/Products/Displays
26 */
27
28#include <linux/module.h>
29#include <linux/ratelimit.h>
30#include <linux/interrupt.h>
31#include <linux/input.h>
32#include <linux/i2c.h>
33#include <linux/uaccess.h>
34#include <linux/delay.h>
35#include <linux/debugfs.h>
36#include <linux/slab.h>
37#include <linux/gpio.h>
38#include <linux/of_gpio.h>
39#include <linux/input/mt.h>
40#include <linux/input/edt-ft5x06.h>
41
42#define MAX_SUPPORT_POINTS 5
43
44#define WORK_REGISTER_THRESHOLD 0x00
45#define WORK_REGISTER_REPORT_RATE 0x08
46#define WORK_REGISTER_GAIN 0x30
47#define WORK_REGISTER_OFFSET 0x31
48#define WORK_REGISTER_NUM_X 0x33
49#define WORK_REGISTER_NUM_Y 0x34
50
51#define M09_REGISTER_THRESHOLD 0x80
52#define M09_REGISTER_GAIN 0x92
53#define M09_REGISTER_OFFSET 0x93
54#define M09_REGISTER_NUM_X 0x94
55#define M09_REGISTER_NUM_Y 0x95
56
57#define NO_REGISTER 0xff
58
59#define WORK_REGISTER_OPMODE 0x3c
60#define FACTORY_REGISTER_OPMODE 0x01
61
62#define TOUCH_EVENT_DOWN 0x00
63#define TOUCH_EVENT_UP 0x01
64#define TOUCH_EVENT_ON 0x02
65#define TOUCH_EVENT_RESERVED 0x03
66
67#define EDT_NAME_LEN 23
68#define EDT_SWITCH_MODE_RETRIES 10
69#define EDT_SWITCH_MODE_DELAY 5 /* msec */
70#define EDT_RAW_DATA_RETRIES 100
71#define EDT_RAW_DATA_DELAY 1 /* msec */
72
73enum edt_ver {
74 M06,
75 M09,
76};
77
78struct edt_reg_addr {
79 int reg_threshold;
80 int reg_report_rate;
81 int reg_gain;
82 int reg_offset;
83 int reg_num_x;
84 int reg_num_y;
85};
86
87struct edt_ft5x06_ts_data {
88 struct i2c_client *client;
89 struct input_dev *input;
90 u16 num_x;
91 u16 num_y;
92
93 int reset_pin;
94 int irq_pin;
95 int wake_pin;
96
97#if defined(CONFIG_DEBUG_FS)
98 struct dentry *debug_dir;
99 u8 *raw_buffer;
100 size_t raw_bufsize;
101#endif
102
103 struct mutex mutex;
104 bool factory_mode;
105 int threshold;
106 int gain;
107 int offset;
108 int report_rate;
109
110 char name[EDT_NAME_LEN];
111
112 struct edt_reg_addr reg_addr;
113 enum edt_ver version;
114};
115
116static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
117 u16 wr_len, u8 *wr_buf,
118 u16 rd_len, u8 *rd_buf)
119{
120 struct i2c_msg wrmsg[2];
121 int i = 0;
122 int ret;
123
124 if (wr_len) {
125 wrmsg[i].addr = client->addr;
126 wrmsg[i].flags = 0;
127 wrmsg[i].len = wr_len;
128 wrmsg[i].buf = wr_buf;
129 i++;
130 }
131 if (rd_len) {
132 wrmsg[i].addr = client->addr;
133 wrmsg[i].flags = I2C_M_RD;
134 wrmsg[i].len = rd_len;
135 wrmsg[i].buf = rd_buf;
136 i++;
137 }
138
139 ret = i2c_transfer(client->adapter, wrmsg, i);
140 if (ret < 0)
141 return ret;
142 if (ret != i)
143 return -EIO;
144
145 return 0;
146}
147
148static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
149 u8 *buf, int buflen)
150{
151 int i;
152 u8 crc = 0;
153
154 for (i = 0; i < buflen - 1; i++)
155 crc ^= buf[i];
156
157 if (crc != buf[buflen-1]) {
158 dev_err_ratelimited(&tsdata->client->dev,
159 "crc error: 0x%02x expected, got 0x%02x\n",
160 crc, buf[buflen-1]);
161 return false;
162 }
163
164 return true;
165}
166
167static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
168{
169 struct edt_ft5x06_ts_data *tsdata = dev_id;
170 struct device *dev = &tsdata->client->dev;
171 u8 cmd;
172 u8 rdbuf[29];
173 int i, type, x, y, id;
174 int offset, tplen, datalen;
175 int error;
176
177 switch (tsdata->version) {
178 case M06:
179 cmd = 0xf9; /* tell the controller to send touch data */
180 offset = 5; /* where the actual touch data starts */
181 tplen = 4; /* data comes in so called frames */
182 datalen = 26; /* how much bytes to listen for */
183 break;
184
185 case M09:
186 cmd = 0x02;
187 offset = 1;
188 tplen = 6;
189 datalen = 29;
190 break;
191
192 default:
193 goto out;
194 }
195
196 memset(rdbuf, 0, sizeof(rdbuf));
197
198 error = edt_ft5x06_ts_readwrite(tsdata->client,
199 sizeof(cmd), &cmd,
200 datalen, rdbuf);
201 if (error) {
202 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
203 error);
204 goto out;
205 }
206
207 /* M09 does not send header or CRC */
208 if (tsdata->version == M06) {
209 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
210 rdbuf[2] != datalen) {
211 dev_err_ratelimited(dev,
212 "Unexpected header: %02x%02x%02x!\n",
213 rdbuf[0], rdbuf[1], rdbuf[2]);
214 goto out;
215 }
216
217 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen))
218 goto out;
219 }
220
221 for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
222 u8 *buf = &rdbuf[i * tplen + offset];
223 bool down;
224
225 type = buf[0] >> 6;
226 /* ignore Reserved events */
227 if (type == TOUCH_EVENT_RESERVED)
228 continue;
229
230 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
231 if (tsdata->version == M06 && type == TOUCH_EVENT_DOWN)
232 continue;
233
234 x = ((buf[0] << 8) | buf[1]) & 0x0fff;
235 y = ((buf[2] << 8) | buf[3]) & 0x0fff;
236 id = (buf[2] >> 4) & 0x0f;
237 down = type != TOUCH_EVENT_UP;
238
239 input_mt_slot(tsdata->input, id);
240 input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
241
242 if (!down)
243 continue;
244
245 input_report_abs(tsdata->input, ABS_MT_POSITION_X, x);
246 input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y);
247 }
248
249 input_mt_report_pointer_emulation(tsdata->input, true);
250 input_sync(tsdata->input);
251
252out:
253 return IRQ_HANDLED;
254}
255
256static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
257 u8 addr, u8 value)
258{
259 u8 wrbuf[4];
260
261 switch (tsdata->version) {
262 case M06:
263 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
264 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
265 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
266 wrbuf[2] = value;
267 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
268 return edt_ft5x06_ts_readwrite(tsdata->client, 4,
269 wrbuf, 0, NULL);
270 case M09:
271 wrbuf[0] = addr;
272 wrbuf[1] = value;
273
274 return edt_ft5x06_ts_readwrite(tsdata->client, 3,
275 wrbuf, 0, NULL);
276
277 default:
278 return -EINVAL;
279 }
280}
281
282static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
283 u8 addr)
284{
285 u8 wrbuf[2], rdbuf[2];
286 int error;
287
288 switch (tsdata->version) {
289 case M06:
290 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
291 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
292 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
293
294 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2,
295 rdbuf);
296 if (error)
297 return error;
298
299 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
300 dev_err(&tsdata->client->dev,
301 "crc error: 0x%02x expected, got 0x%02x\n",
302 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0],
303 rdbuf[1]);
304 return -EIO;
305 }
306 break;
307
308 case M09:
309 wrbuf[0] = addr;
310 error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
311 wrbuf, 1, rdbuf);
312 if (error)
313 return error;
314 break;
315
316 default:
317 return -EINVAL;
318 }
319
320 return rdbuf[0];
321}
322
323struct edt_ft5x06_attribute {
324 struct device_attribute dattr;
325 size_t field_offset;
326 u8 limit_low;
327 u8 limit_high;
328 u8 addr_m06;
329 u8 addr_m09;
330};
331
332#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, \
333 _limit_low, _limit_high) \
334 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
335 .dattr = __ATTR(_field, _mode, \
336 edt_ft5x06_setting_show, \
337 edt_ft5x06_setting_store), \
338 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
339 .addr_m06 = _addr_m06, \
340 .addr_m09 = _addr_m09, \
341 .limit_low = _limit_low, \
342 .limit_high = _limit_high, \
343 }
344
345static ssize_t edt_ft5x06_setting_show(struct device *dev,
346 struct device_attribute *dattr,
347 char *buf)
348{
349 struct i2c_client *client = to_i2c_client(dev);
350 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
351 struct edt_ft5x06_attribute *attr =
352 container_of(dattr, struct edt_ft5x06_attribute, dattr);
353 u8 *field = (u8 *)tsdata + attr->field_offset;
354 int val;
355 size_t count = 0;
356 int error = 0;
357 u8 addr;
358
359 mutex_lock(&tsdata->mutex);
360
361 if (tsdata->factory_mode) {
362 error = -EIO;
363 goto out;
364 }
365
366 switch (tsdata->version) {
367 case M06:
368 addr = attr->addr_m06;
369 break;
370
371 case M09:
372 addr = attr->addr_m09;
373 break;
374
375 default:
376 error = -ENODEV;
377 goto out;
378 }
379
380 if (addr != NO_REGISTER) {
381 val = edt_ft5x06_register_read(tsdata, addr);
382 if (val < 0) {
383 error = val;
384 dev_err(&tsdata->client->dev,
385 "Failed to fetch attribute %s, error %d\n",
386 dattr->attr.name, error);
387 goto out;
388 }
389 } else {
390 val = *field;
391 }
392
393 if (val != *field) {
394 dev_warn(&tsdata->client->dev,
395 "%s: read (%d) and stored value (%d) differ\n",
396 dattr->attr.name, val, *field);
397 *field = val;
398 }
399
400 count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
401out:
402 mutex_unlock(&tsdata->mutex);
403 return error ?: count;
404}
405
406static ssize_t edt_ft5x06_setting_store(struct device *dev,
407 struct device_attribute *dattr,
408 const char *buf, size_t count)
409{
410 struct i2c_client *client = to_i2c_client(dev);
411 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
412 struct edt_ft5x06_attribute *attr =
413 container_of(dattr, struct edt_ft5x06_attribute, dattr);
414 u8 *field = (u8 *)tsdata + attr->field_offset;
415 unsigned int val;
416 int error;
417 u8 addr;
418
419 mutex_lock(&tsdata->mutex);
420
421 if (tsdata->factory_mode) {
422 error = -EIO;
423 goto out;
424 }
425
426 error = kstrtouint(buf, 0, &val);
427 if (error)
428 goto out;
429
430 if (val < attr->limit_low || val > attr->limit_high) {
431 error = -ERANGE;
432 goto out;
433 }
434
435 switch (tsdata->version) {
436 case M06:
437 addr = attr->addr_m06;
438 break;
439
440 case M09:
441 addr = attr->addr_m09;
442 break;
443
444 default:
445 error = -ENODEV;
446 goto out;
447 }
448
449 if (addr != NO_REGISTER) {
450 error = edt_ft5x06_register_write(tsdata, addr, val);
451 if (error) {
452 dev_err(&tsdata->client->dev,
453 "Failed to update attribute %s, error: %d\n",
454 dattr->attr.name, error);
455 goto out;
456 }
457 }
458 *field = val;
459
460out:
461 mutex_unlock(&tsdata->mutex);
462 return error ?: count;
463}
464
465static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
466 M09_REGISTER_GAIN, 0, 31);
467static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
468 M09_REGISTER_OFFSET, 0, 31);
469static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
470 M09_REGISTER_THRESHOLD, 20, 80);
471static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
472 NO_REGISTER, 3, 14);
473
474static struct attribute *edt_ft5x06_attrs[] = {
475 &edt_ft5x06_attr_gain.dattr.attr,
476 &edt_ft5x06_attr_offset.dattr.attr,
477 &edt_ft5x06_attr_threshold.dattr.attr,
478 &edt_ft5x06_attr_report_rate.dattr.attr,
479 NULL
480};
481
482static const struct attribute_group edt_ft5x06_attr_group = {
483 .attrs = edt_ft5x06_attrs,
484};
485
486#ifdef CONFIG_DEBUG_FS
487static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
488{
489 struct i2c_client *client = tsdata->client;
490 int retries = EDT_SWITCH_MODE_RETRIES;
491 int ret;
492 int error;
493
494 disable_irq(client->irq);
495
496 if (!tsdata->raw_buffer) {
497 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
498 sizeof(u16);
499 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
500 if (!tsdata->raw_buffer) {
501 error = -ENOMEM;
502 goto err_out;
503 }
504 }
505
506 /* mode register is 0x3c when in the work mode */
507 if (tsdata->version == M09)
508 goto m09_out;
509
510 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
511 if (error) {
512 dev_err(&client->dev,
513 "failed to switch to factory mode, error %d\n", error);
514 goto err_out;
515 }
516
517 tsdata->factory_mode = true;
518 do {
519 mdelay(EDT_SWITCH_MODE_DELAY);
520 /* mode register is 0x01 when in factory mode */
521 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
522 if (ret == 0x03)
523 break;
524 } while (--retries > 0);
525
526 if (retries == 0) {
527 dev_err(&client->dev, "not in factory mode after %dms.\n",
528 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
529 error = -EIO;
530 goto err_out;
531 }
532
533 return 0;
534
535err_out:
536 kfree(tsdata->raw_buffer);
537 tsdata->raw_buffer = NULL;
538 tsdata->factory_mode = false;
539 enable_irq(client->irq);
540
541 return error;
542
543m09_out:
544 dev_err(&client->dev, "No factory mode support for M09\n");
545 return -EINVAL;
546
547}
548
549static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
550{
551 struct i2c_client *client = tsdata->client;
552 int retries = EDT_SWITCH_MODE_RETRIES;
553 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
554 int ret;
555 int error;
556
557 /* mode register is 0x01 when in the factory mode */
558 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
559 if (error) {
560 dev_err(&client->dev,
561 "failed to switch to work mode, error: %d\n", error);
562 return error;
563 }
564
565 tsdata->factory_mode = false;
566
567 do {
568 mdelay(EDT_SWITCH_MODE_DELAY);
569 /* mode register is 0x01 when in factory mode */
570 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
571 if (ret == 0x01)
572 break;
573 } while (--retries > 0);
574
575 if (retries == 0) {
576 dev_err(&client->dev, "not in work mode after %dms.\n",
577 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
578 tsdata->factory_mode = true;
579 return -EIO;
580 }
581
582 kfree(tsdata->raw_buffer);
583 tsdata->raw_buffer = NULL;
584
585 /* restore parameters */
586 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
587 tsdata->threshold);
588 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
589 tsdata->gain);
590 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
591 tsdata->offset);
592 if (reg_addr->reg_report_rate)
593 edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
594 tsdata->report_rate);
595
596 enable_irq(client->irq);
597
598 return 0;
599}
600
601static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
602{
603 struct edt_ft5x06_ts_data *tsdata = data;
604
605 *mode = tsdata->factory_mode;
606
607 return 0;
608};
609
610static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
611{
612 struct edt_ft5x06_ts_data *tsdata = data;
613 int retval = 0;
614
615 if (mode > 1)
616 return -ERANGE;
617
618 mutex_lock(&tsdata->mutex);
619
620 if (mode != tsdata->factory_mode) {
621 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
622 edt_ft5x06_work_mode(tsdata);
623 }
624
625 mutex_unlock(&tsdata->mutex);
626
627 return retval;
628};
629
630DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
631 edt_ft5x06_debugfs_mode_set, "%llu\n");
632
633static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
634 char __user *buf, size_t count, loff_t *off)
635{
636 struct edt_ft5x06_ts_data *tsdata = file->private_data;
637 struct i2c_client *client = tsdata->client;
638 int retries = EDT_RAW_DATA_RETRIES;
639 int val, i, error;
640 size_t read = 0;
641 int colbytes;
642 char wrbuf[3];
643 u8 *rdbuf;
644
645 if (*off < 0 || *off >= tsdata->raw_bufsize)
646 return 0;
647
648 mutex_lock(&tsdata->mutex);
649
650 if (!tsdata->factory_mode || !tsdata->raw_buffer) {
651 error = -EIO;
652 goto out;
653 }
654
655 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
656 if (error) {
657 dev_dbg(&client->dev,
658 "failed to write 0x08 register, error %d\n", error);
659 goto out;
660 }
661
662 do {
663 msleep(EDT_RAW_DATA_DELAY);
664 val = edt_ft5x06_register_read(tsdata, 0x08);
665 if (val < 1)
666 break;
667 } while (--retries > 0);
668
669 if (val < 0) {
670 error = val;
671 dev_dbg(&client->dev,
672 "failed to read 0x08 register, error %d\n", error);
673 goto out;
674 }
675
676 if (retries == 0) {
677 dev_dbg(&client->dev,
678 "timed out waiting for register to settle\n");
679 error = -ETIMEDOUT;
680 goto out;
681 }
682
683 rdbuf = tsdata->raw_buffer;
684 colbytes = tsdata->num_y * sizeof(u16);
685
686 wrbuf[0] = 0xf5;
687 wrbuf[1] = 0x0e;
688 for (i = 0; i < tsdata->num_x; i++) {
689 wrbuf[2] = i; /* column index */
690 error = edt_ft5x06_ts_readwrite(tsdata->client,
691 sizeof(wrbuf), wrbuf,
692 colbytes, rdbuf);
693 if (error)
694 goto out;
695
696 rdbuf += colbytes;
697 }
698
699 read = min_t(size_t, count, tsdata->raw_bufsize - *off);
700 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
701 error = -EFAULT;
702 goto out;
703 }
704
705 *off += read;
706out:
707 mutex_unlock(&tsdata->mutex);
708 return error ?: read;
709};
710
711static const struct file_operations debugfs_raw_data_fops = {
712 .open = simple_open,
713 .read = edt_ft5x06_debugfs_raw_data_read,
714};
715
716static void
717edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
718 const char *debugfs_name)
719{
720 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
721 if (!tsdata->debug_dir)
722 return;
723
724 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
725 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
726
727 debugfs_create_file("mode", S_IRUSR | S_IWUSR,
728 tsdata->debug_dir, tsdata, &debugfs_mode_fops);
729 debugfs_create_file("raw_data", S_IRUSR,
730 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
731}
732
733static void
734edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
735{
736 if (tsdata->debug_dir)
737 debugfs_remove_recursive(tsdata->debug_dir);
738 kfree(tsdata->raw_buffer);
739}
740
741#else
742
743static inline void
744edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
745 const char *debugfs_name)
746{
747}
748
749static inline void
750edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
751{
752}
753
754#endif /* CONFIG_DEBUGFS */
755
756static int edt_ft5x06_ts_reset(struct i2c_client *client,
757 struct edt_ft5x06_ts_data *tsdata)
758{
759 int error;
760
761 if (gpio_is_valid(tsdata->wake_pin)) {
762 error = devm_gpio_request_one(&client->dev,
763 tsdata->wake_pin, GPIOF_OUT_INIT_LOW,
764 "edt-ft5x06 wake");
765 if (error) {
766 dev_err(&client->dev,
767 "Failed to request GPIO %d as wake pin, error %d\n",
768 tsdata->wake_pin, error);
769 return error;
770 }
771
772 msleep(5);
773 gpio_set_value(tsdata->wake_pin, 1);
774 }
775 if (gpio_is_valid(tsdata->reset_pin)) {
776 /* this pulls reset down, enabling the low active reset */
777 error = devm_gpio_request_one(&client->dev,
778 tsdata->reset_pin, GPIOF_OUT_INIT_LOW,
779 "edt-ft5x06 reset");
780 if (error) {
781 dev_err(&client->dev,
782 "Failed to request GPIO %d as reset pin, error %d\n",
783 tsdata->reset_pin, error);
784 return error;
785 }
786
787 msleep(5);
788 gpio_set_value(tsdata->reset_pin, 1);
789 msleep(300);
790 }
791
792 return 0;
793}
794
795static int edt_ft5x06_ts_identify(struct i2c_client *client,
796 struct edt_ft5x06_ts_data *tsdata,
797 char *fw_version)
798{
799 u8 rdbuf[EDT_NAME_LEN];
800 char *p;
801 int error;
802 char *model_name = tsdata->name;
803
804 /* see what we find if we assume it is a M06 *
805 * if we get less than EDT_NAME_LEN, we don't want
806 * to have garbage in there
807 */
808 memset(rdbuf, 0, sizeof(rdbuf));
809 error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
810 EDT_NAME_LEN - 1, rdbuf);
811 if (error)
812 return error;
813
814 /* if we find something consistent, stay with that assumption
815 * at least M09 won't send 3 bytes here
816 */
817 if (!(strnicmp(rdbuf + 1, "EP0", 3))) {
818 tsdata->version = M06;
819
820 /* remove last '$' end marker */
821 rdbuf[EDT_NAME_LEN - 1] = '\0';
822 if (rdbuf[EDT_NAME_LEN - 2] == '$')
823 rdbuf[EDT_NAME_LEN - 2] = '\0';
824
825 /* look for Model/Version separator */
826 p = strchr(rdbuf, '*');
827 if (p)
828 *p++ = '\0';
829 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
830 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
831 } else {
832 /* since there are only two versions around (M06, M09) */
833 tsdata->version = M09;
834
835 error = edt_ft5x06_ts_readwrite(client, 1, "\xA6",
836 2, rdbuf);
837 if (error)
838 return error;
839
840 strlcpy(fw_version, rdbuf, 2);
841
842 error = edt_ft5x06_ts_readwrite(client, 1, "\xA8",
843 1, rdbuf);
844 if (error)
845 return error;
846
847 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
848 rdbuf[0] >> 4, rdbuf[0] & 0x0F);
849 }
850
851 return 0;
852}
853
854#define EDT_ATTR_CHECKSET(name, reg) \
855 if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \
856 pdata->name <= edt_ft5x06_attr_##name.limit_high) \
857 edt_ft5x06_register_write(tsdata, reg, pdata->name)
858
859#define EDT_GET_PROP(name, reg) { \
860 u32 val; \
861 if (of_property_read_u32(np, #name, &val) == 0) \
862 edt_ft5x06_register_write(tsdata, reg, val); \
863}
864
865static void edt_ft5x06_ts_get_dt_defaults(struct device_node *np,
866 struct edt_ft5x06_ts_data *tsdata)
867{
868 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
869
870 EDT_GET_PROP(threshold, reg_addr->reg_threshold);
871 EDT_GET_PROP(gain, reg_addr->reg_gain);
872 EDT_GET_PROP(offset, reg_addr->reg_offset);
873}
874
875static void
876edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata,
877 const struct edt_ft5x06_platform_data *pdata)
878{
879 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
880
881 if (!pdata->use_parameters)
882 return;
883
884 /* pick up defaults from the platform data */
885 EDT_ATTR_CHECKSET(threshold, reg_addr->reg_threshold);
886 EDT_ATTR_CHECKSET(gain, reg_addr->reg_gain);
887 EDT_ATTR_CHECKSET(offset, reg_addr->reg_offset);
888 if (reg_addr->reg_report_rate != NO_REGISTER)
889 EDT_ATTR_CHECKSET(report_rate, reg_addr->reg_report_rate);
890}
891
892static void
893edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
894{
895 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
896
897 tsdata->threshold = edt_ft5x06_register_read(tsdata,
898 reg_addr->reg_threshold);
899 tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
900 tsdata->offset = edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
901 if (reg_addr->reg_report_rate != NO_REGISTER)
902 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
903 reg_addr->reg_report_rate);
904 tsdata->num_x = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_x);
905 tsdata->num_y = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_y);
906}
907
908static void
909edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
910{
911 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
912
913 switch (tsdata->version) {
914 case M06:
915 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
916 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
917 reg_addr->reg_gain = WORK_REGISTER_GAIN;
918 reg_addr->reg_offset = WORK_REGISTER_OFFSET;
919 reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
920 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
921 break;
922
923 case M09:
924 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
925 reg_addr->reg_gain = M09_REGISTER_GAIN;
926 reg_addr->reg_offset = M09_REGISTER_OFFSET;
927 reg_addr->reg_num_x = M09_REGISTER_NUM_X;
928 reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
929 break;
930 }
931}
932
933#ifdef CONFIG_OF
934static int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
935 struct edt_ft5x06_ts_data *tsdata)
936{
937 struct device_node *np = dev->of_node;
938
939 /*
940 * irq_pin is not needed for DT setup.
941 * irq is associated via 'interrupts' property in DT
942 */
943 tsdata->irq_pin = -EINVAL;
944 tsdata->reset_pin = of_get_named_gpio(np, "reset-gpios", 0);
945 tsdata->wake_pin = of_get_named_gpio(np, "wake-gpios", 0);
946
947 return 0;
948}
949#else
950static inline int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
951 struct edt_ft5x06_ts_data *tsdata)
952{
953 return -ENODEV;
954}
955#endif
956
957static int edt_ft5x06_ts_probe(struct i2c_client *client,
958 const struct i2c_device_id *id)
959{
960 const struct edt_ft5x06_platform_data *pdata =
961 dev_get_platdata(&client->dev);
962 struct edt_ft5x06_ts_data *tsdata;
963 struct input_dev *input;
964 int error;
965 char fw_version[EDT_NAME_LEN];
966
967 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
968
969 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
970 if (!tsdata) {
971 dev_err(&client->dev, "failed to allocate driver data.\n");
972 return -ENOMEM;
973 }
974
975 if (!pdata) {
976 error = edt_ft5x06_i2c_ts_probe_dt(&client->dev, tsdata);
977 if (error) {
978 dev_err(&client->dev,
979 "DT probe failed and no platform data present\n");
980 return error;
981 }
982 } else {
983 tsdata->reset_pin = pdata->reset_pin;
984 tsdata->irq_pin = pdata->irq_pin;
985 tsdata->wake_pin = -EINVAL;
986 }
987
988 error = edt_ft5x06_ts_reset(client, tsdata);
989 if (error)
990 return error;
991
992 if (gpio_is_valid(tsdata->irq_pin)) {
993 error = devm_gpio_request_one(&client->dev, tsdata->irq_pin,
994 GPIOF_IN, "edt-ft5x06 irq");
995 if (error) {
996 dev_err(&client->dev,
997 "Failed to request GPIO %d, error %d\n",
998 tsdata->irq_pin, error);
999 return error;
1000 }
1001 }
1002
1003 input = devm_input_allocate_device(&client->dev);
1004 if (!input) {
1005 dev_err(&client->dev, "failed to allocate input device.\n");
1006 return -ENOMEM;
1007 }
1008
1009 mutex_init(&tsdata->mutex);
1010 tsdata->client = client;
1011 tsdata->input = input;
1012 tsdata->factory_mode = false;
1013
1014 error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
1015 if (error) {
1016 dev_err(&client->dev, "touchscreen probe failed\n");
1017 return error;
1018 }
1019
1020 edt_ft5x06_ts_set_regs(tsdata);
1021
1022 if (!pdata)
1023 edt_ft5x06_ts_get_dt_defaults(client->dev.of_node, tsdata);
1024 else
1025 edt_ft5x06_ts_get_defaults(tsdata, pdata);
1026
1027 edt_ft5x06_ts_get_parameters(tsdata);
1028
1029 dev_dbg(&client->dev,
1030 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
1031 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
1032
1033 input->name = tsdata->name;
1034 input->id.bustype = BUS_I2C;
1035 input->dev.parent = &client->dev;
1036
1037 __set_bit(EV_SYN, input->evbit);
1038 __set_bit(EV_KEY, input->evbit);
1039 __set_bit(EV_ABS, input->evbit);
1040 __set_bit(BTN_TOUCH, input->keybit);
1041 input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
1042 input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
1043 input_set_abs_params(input, ABS_MT_POSITION_X,
1044 0, tsdata->num_x * 64 - 1, 0, 0);
1045 input_set_abs_params(input, ABS_MT_POSITION_Y,
1046 0, tsdata->num_y * 64 - 1, 0, 0);
1047 error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0);
1048 if (error) {
1049 dev_err(&client->dev, "Unable to init MT slots.\n");
1050 return error;
1051 }
1052
1053 input_set_drvdata(input, tsdata);
1054 i2c_set_clientdata(client, tsdata);
1055
1056 error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
1057 edt_ft5x06_ts_isr,
1058 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1059 client->name, tsdata);
1060 if (error) {
1061 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
1062 return error;
1063 }
1064
1065 error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1066 if (error)
1067 return error;
1068
1069 error = input_register_device(input);
1070 if (error)
1071 goto err_remove_attrs;
1072
1073 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1074 device_init_wakeup(&client->dev, 1);
1075
1076 dev_dbg(&client->dev,
1077 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
1078 client->irq, tsdata->wake_pin, tsdata->reset_pin);
1079
1080 return 0;
1081
1082err_remove_attrs:
1083 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1084 return error;
1085}
1086
1087static int edt_ft5x06_ts_remove(struct i2c_client *client)
1088{
1089 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1090
1091 edt_ft5x06_ts_teardown_debugfs(tsdata);
1092 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1093
1094 return 0;
1095}
1096
1097#ifdef CONFIG_PM_SLEEP
1098static int edt_ft5x06_ts_suspend(struct device *dev)
1099{
1100 struct i2c_client *client = to_i2c_client(dev);
1101
1102 if (device_may_wakeup(dev))
1103 enable_irq_wake(client->irq);
1104
1105 return 0;
1106}
1107
1108static int edt_ft5x06_ts_resume(struct device *dev)
1109{
1110 struct i2c_client *client = to_i2c_client(dev);
1111
1112 if (device_may_wakeup(dev))
1113 disable_irq_wake(client->irq);
1114
1115 return 0;
1116}
1117#endif
1118
1119static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
1120 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
1121
1122static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1123 { "edt-ft5x06", 0, },
1124 { /* sentinel */ }
1125};
1126MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1127
1128#ifdef CONFIG_OF
1129static const struct of_device_id edt_ft5x06_of_match[] = {
1130 { .compatible = "edt,edt-ft5206", },
1131 { .compatible = "edt,edt-ft5306", },
1132 { .compatible = "edt,edt-ft5406", },
1133 { /* sentinel */ }
1134};
1135MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1136#endif
1137
1138static struct i2c_driver edt_ft5x06_ts_driver = {
1139 .driver = {
1140 .owner = THIS_MODULE,
1141 .name = "edt_ft5x06",
1142 .of_match_table = of_match_ptr(edt_ft5x06_of_match),
1143 .pm = &edt_ft5x06_ts_pm_ops,
1144 },
1145 .id_table = edt_ft5x06_ts_id,
1146 .probe = edt_ft5x06_ts_probe,
1147 .remove = edt_ft5x06_ts_remove,
1148};
1149
1150module_i2c_driver(edt_ft5x06_ts_driver);
1151
1152MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
1153MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1154MODULE_LICENSE("GPL");
1/*
2 * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
3 * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support)
4 * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
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/*
21 * This is a driver for the EDT "Polytouch" family of touch controllers
22 * based on the FocalTech FT5x06 line of chips.
23 *
24 * Development of this driver has been sponsored by Glyn:
25 * http://www.glyn.com/Products/Displays
26 */
27
28#include <linux/module.h>
29#include <linux/ratelimit.h>
30#include <linux/irq.h>
31#include <linux/interrupt.h>
32#include <linux/input.h>
33#include <linux/i2c.h>
34#include <linux/uaccess.h>
35#include <linux/delay.h>
36#include <linux/debugfs.h>
37#include <linux/slab.h>
38#include <linux/gpio/consumer.h>
39#include <linux/input/mt.h>
40#include <linux/input/touchscreen.h>
41#include <linux/of_device.h>
42
43#define WORK_REGISTER_THRESHOLD 0x00
44#define WORK_REGISTER_REPORT_RATE 0x08
45#define WORK_REGISTER_GAIN 0x30
46#define WORK_REGISTER_OFFSET 0x31
47#define WORK_REGISTER_NUM_X 0x33
48#define WORK_REGISTER_NUM_Y 0x34
49
50#define M09_REGISTER_THRESHOLD 0x80
51#define M09_REGISTER_GAIN 0x92
52#define M09_REGISTER_OFFSET 0x93
53#define M09_REGISTER_NUM_X 0x94
54#define M09_REGISTER_NUM_Y 0x95
55
56#define NO_REGISTER 0xff
57
58#define WORK_REGISTER_OPMODE 0x3c
59#define FACTORY_REGISTER_OPMODE 0x01
60
61#define TOUCH_EVENT_DOWN 0x00
62#define TOUCH_EVENT_UP 0x01
63#define TOUCH_EVENT_ON 0x02
64#define TOUCH_EVENT_RESERVED 0x03
65
66#define EDT_NAME_LEN 23
67#define EDT_SWITCH_MODE_RETRIES 10
68#define EDT_SWITCH_MODE_DELAY 5 /* msec */
69#define EDT_RAW_DATA_RETRIES 100
70#define EDT_RAW_DATA_DELAY 1 /* msec */
71
72enum edt_ver {
73 M06,
74 M09,
75};
76
77struct edt_reg_addr {
78 int reg_threshold;
79 int reg_report_rate;
80 int reg_gain;
81 int reg_offset;
82 int reg_num_x;
83 int reg_num_y;
84};
85
86struct edt_ft5x06_ts_data {
87 struct i2c_client *client;
88 struct input_dev *input;
89 struct touchscreen_properties prop;
90 u16 num_x;
91 u16 num_y;
92
93 struct gpio_desc *reset_gpio;
94 struct gpio_desc *wake_gpio;
95
96#if defined(CONFIG_DEBUG_FS)
97 struct dentry *debug_dir;
98 u8 *raw_buffer;
99 size_t raw_bufsize;
100#endif
101
102 struct mutex mutex;
103 bool factory_mode;
104 int threshold;
105 int gain;
106 int offset;
107 int report_rate;
108 int max_support_points;
109
110 char name[EDT_NAME_LEN];
111
112 struct edt_reg_addr reg_addr;
113 enum edt_ver version;
114};
115
116struct edt_i2c_chip_data {
117 int max_support_points;
118};
119
120static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
121 u16 wr_len, u8 *wr_buf,
122 u16 rd_len, u8 *rd_buf)
123{
124 struct i2c_msg wrmsg[2];
125 int i = 0;
126 int ret;
127
128 if (wr_len) {
129 wrmsg[i].addr = client->addr;
130 wrmsg[i].flags = 0;
131 wrmsg[i].len = wr_len;
132 wrmsg[i].buf = wr_buf;
133 i++;
134 }
135 if (rd_len) {
136 wrmsg[i].addr = client->addr;
137 wrmsg[i].flags = I2C_M_RD;
138 wrmsg[i].len = rd_len;
139 wrmsg[i].buf = rd_buf;
140 i++;
141 }
142
143 ret = i2c_transfer(client->adapter, wrmsg, i);
144 if (ret < 0)
145 return ret;
146 if (ret != i)
147 return -EIO;
148
149 return 0;
150}
151
152static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
153 u8 *buf, int buflen)
154{
155 int i;
156 u8 crc = 0;
157
158 for (i = 0; i < buflen - 1; i++)
159 crc ^= buf[i];
160
161 if (crc != buf[buflen-1]) {
162 dev_err_ratelimited(&tsdata->client->dev,
163 "crc error: 0x%02x expected, got 0x%02x\n",
164 crc, buf[buflen-1]);
165 return false;
166 }
167
168 return true;
169}
170
171static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
172{
173 struct edt_ft5x06_ts_data *tsdata = dev_id;
174 struct device *dev = &tsdata->client->dev;
175 u8 cmd;
176 u8 rdbuf[63];
177 int i, type, x, y, id;
178 int offset, tplen, datalen, crclen;
179 int error;
180
181 switch (tsdata->version) {
182 case M06:
183 cmd = 0xf9; /* tell the controller to send touch data */
184 offset = 5; /* where the actual touch data starts */
185 tplen = 4; /* data comes in so called frames */
186 crclen = 1; /* length of the crc data */
187 break;
188
189 case M09:
190 cmd = 0x0;
191 offset = 3;
192 tplen = 6;
193 crclen = 0;
194 break;
195
196 default:
197 goto out;
198 }
199
200 memset(rdbuf, 0, sizeof(rdbuf));
201 datalen = tplen * tsdata->max_support_points + offset + crclen;
202
203 error = edt_ft5x06_ts_readwrite(tsdata->client,
204 sizeof(cmd), &cmd,
205 datalen, rdbuf);
206 if (error) {
207 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
208 error);
209 goto out;
210 }
211
212 /* M09 does not send header or CRC */
213 if (tsdata->version == M06) {
214 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
215 rdbuf[2] != datalen) {
216 dev_err_ratelimited(dev,
217 "Unexpected header: %02x%02x%02x!\n",
218 rdbuf[0], rdbuf[1], rdbuf[2]);
219 goto out;
220 }
221
222 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen))
223 goto out;
224 }
225
226 for (i = 0; i < tsdata->max_support_points; i++) {
227 u8 *buf = &rdbuf[i * tplen + offset];
228 bool down;
229
230 type = buf[0] >> 6;
231 /* ignore Reserved events */
232 if (type == TOUCH_EVENT_RESERVED)
233 continue;
234
235 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
236 if (tsdata->version == M06 && type == TOUCH_EVENT_DOWN)
237 continue;
238
239 x = ((buf[0] << 8) | buf[1]) & 0x0fff;
240 y = ((buf[2] << 8) | buf[3]) & 0x0fff;
241 id = (buf[2] >> 4) & 0x0f;
242 down = type != TOUCH_EVENT_UP;
243
244 input_mt_slot(tsdata->input, id);
245 input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
246
247 if (!down)
248 continue;
249
250 touchscreen_report_pos(tsdata->input, &tsdata->prop, x, y,
251 true);
252 }
253
254 input_mt_report_pointer_emulation(tsdata->input, true);
255 input_sync(tsdata->input);
256
257out:
258 return IRQ_HANDLED;
259}
260
261static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
262 u8 addr, u8 value)
263{
264 u8 wrbuf[4];
265
266 switch (tsdata->version) {
267 case M06:
268 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
269 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
270 wrbuf[2] = value;
271 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
272 return edt_ft5x06_ts_readwrite(tsdata->client, 4,
273 wrbuf, 0, NULL);
274 case M09:
275 wrbuf[0] = addr;
276 wrbuf[1] = value;
277
278 return edt_ft5x06_ts_readwrite(tsdata->client, 2,
279 wrbuf, 0, NULL);
280
281 default:
282 return -EINVAL;
283 }
284}
285
286static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
287 u8 addr)
288{
289 u8 wrbuf[2], rdbuf[2];
290 int error;
291
292 switch (tsdata->version) {
293 case M06:
294 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
295 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
296 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
297
298 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2,
299 rdbuf);
300 if (error)
301 return error;
302
303 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
304 dev_err(&tsdata->client->dev,
305 "crc error: 0x%02x expected, got 0x%02x\n",
306 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0],
307 rdbuf[1]);
308 return -EIO;
309 }
310 break;
311
312 case M09:
313 wrbuf[0] = addr;
314 error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
315 wrbuf, 1, rdbuf);
316 if (error)
317 return error;
318 break;
319
320 default:
321 return -EINVAL;
322 }
323
324 return rdbuf[0];
325}
326
327struct edt_ft5x06_attribute {
328 struct device_attribute dattr;
329 size_t field_offset;
330 u8 limit_low;
331 u8 limit_high;
332 u8 addr_m06;
333 u8 addr_m09;
334};
335
336#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, \
337 _limit_low, _limit_high) \
338 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
339 .dattr = __ATTR(_field, _mode, \
340 edt_ft5x06_setting_show, \
341 edt_ft5x06_setting_store), \
342 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
343 .addr_m06 = _addr_m06, \
344 .addr_m09 = _addr_m09, \
345 .limit_low = _limit_low, \
346 .limit_high = _limit_high, \
347 }
348
349static ssize_t edt_ft5x06_setting_show(struct device *dev,
350 struct device_attribute *dattr,
351 char *buf)
352{
353 struct i2c_client *client = to_i2c_client(dev);
354 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
355 struct edt_ft5x06_attribute *attr =
356 container_of(dattr, struct edt_ft5x06_attribute, dattr);
357 u8 *field = (u8 *)tsdata + attr->field_offset;
358 int val;
359 size_t count = 0;
360 int error = 0;
361 u8 addr;
362
363 mutex_lock(&tsdata->mutex);
364
365 if (tsdata->factory_mode) {
366 error = -EIO;
367 goto out;
368 }
369
370 switch (tsdata->version) {
371 case M06:
372 addr = attr->addr_m06;
373 break;
374
375 case M09:
376 addr = attr->addr_m09;
377 break;
378
379 default:
380 error = -ENODEV;
381 goto out;
382 }
383
384 if (addr != NO_REGISTER) {
385 val = edt_ft5x06_register_read(tsdata, addr);
386 if (val < 0) {
387 error = val;
388 dev_err(&tsdata->client->dev,
389 "Failed to fetch attribute %s, error %d\n",
390 dattr->attr.name, error);
391 goto out;
392 }
393 } else {
394 val = *field;
395 }
396
397 if (val != *field) {
398 dev_warn(&tsdata->client->dev,
399 "%s: read (%d) and stored value (%d) differ\n",
400 dattr->attr.name, val, *field);
401 *field = val;
402 }
403
404 count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
405out:
406 mutex_unlock(&tsdata->mutex);
407 return error ?: count;
408}
409
410static ssize_t edt_ft5x06_setting_store(struct device *dev,
411 struct device_attribute *dattr,
412 const char *buf, size_t count)
413{
414 struct i2c_client *client = to_i2c_client(dev);
415 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
416 struct edt_ft5x06_attribute *attr =
417 container_of(dattr, struct edt_ft5x06_attribute, dattr);
418 u8 *field = (u8 *)tsdata + attr->field_offset;
419 unsigned int val;
420 int error;
421 u8 addr;
422
423 mutex_lock(&tsdata->mutex);
424
425 if (tsdata->factory_mode) {
426 error = -EIO;
427 goto out;
428 }
429
430 error = kstrtouint(buf, 0, &val);
431 if (error)
432 goto out;
433
434 if (val < attr->limit_low || val > attr->limit_high) {
435 error = -ERANGE;
436 goto out;
437 }
438
439 switch (tsdata->version) {
440 case M06:
441 addr = attr->addr_m06;
442 break;
443
444 case M09:
445 addr = attr->addr_m09;
446 break;
447
448 default:
449 error = -ENODEV;
450 goto out;
451 }
452
453 if (addr != NO_REGISTER) {
454 error = edt_ft5x06_register_write(tsdata, addr, val);
455 if (error) {
456 dev_err(&tsdata->client->dev,
457 "Failed to update attribute %s, error: %d\n",
458 dattr->attr.name, error);
459 goto out;
460 }
461 }
462 *field = val;
463
464out:
465 mutex_unlock(&tsdata->mutex);
466 return error ?: count;
467}
468
469static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
470 M09_REGISTER_GAIN, 0, 31);
471static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
472 M09_REGISTER_OFFSET, 0, 31);
473static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
474 M09_REGISTER_THRESHOLD, 20, 80);
475static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
476 NO_REGISTER, 3, 14);
477
478static struct attribute *edt_ft5x06_attrs[] = {
479 &edt_ft5x06_attr_gain.dattr.attr,
480 &edt_ft5x06_attr_offset.dattr.attr,
481 &edt_ft5x06_attr_threshold.dattr.attr,
482 &edt_ft5x06_attr_report_rate.dattr.attr,
483 NULL
484};
485
486static const struct attribute_group edt_ft5x06_attr_group = {
487 .attrs = edt_ft5x06_attrs,
488};
489
490#ifdef CONFIG_DEBUG_FS
491static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
492{
493 struct i2c_client *client = tsdata->client;
494 int retries = EDT_SWITCH_MODE_RETRIES;
495 int ret;
496 int error;
497
498 disable_irq(client->irq);
499
500 if (!tsdata->raw_buffer) {
501 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
502 sizeof(u16);
503 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
504 if (!tsdata->raw_buffer) {
505 error = -ENOMEM;
506 goto err_out;
507 }
508 }
509
510 /* mode register is 0x3c when in the work mode */
511 if (tsdata->version == M09)
512 goto m09_out;
513
514 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
515 if (error) {
516 dev_err(&client->dev,
517 "failed to switch to factory mode, error %d\n", error);
518 goto err_out;
519 }
520
521 tsdata->factory_mode = true;
522 do {
523 mdelay(EDT_SWITCH_MODE_DELAY);
524 /* mode register is 0x01 when in factory mode */
525 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
526 if (ret == 0x03)
527 break;
528 } while (--retries > 0);
529
530 if (retries == 0) {
531 dev_err(&client->dev, "not in factory mode after %dms.\n",
532 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
533 error = -EIO;
534 goto err_out;
535 }
536
537 return 0;
538
539err_out:
540 kfree(tsdata->raw_buffer);
541 tsdata->raw_buffer = NULL;
542 tsdata->factory_mode = false;
543 enable_irq(client->irq);
544
545 return error;
546
547m09_out:
548 dev_err(&client->dev, "No factory mode support for M09\n");
549 return -EINVAL;
550
551}
552
553static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
554{
555 struct i2c_client *client = tsdata->client;
556 int retries = EDT_SWITCH_MODE_RETRIES;
557 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
558 int ret;
559 int error;
560
561 /* mode register is 0x01 when in the factory mode */
562 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
563 if (error) {
564 dev_err(&client->dev,
565 "failed to switch to work mode, error: %d\n", error);
566 return error;
567 }
568
569 tsdata->factory_mode = false;
570
571 do {
572 mdelay(EDT_SWITCH_MODE_DELAY);
573 /* mode register is 0x01 when in factory mode */
574 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
575 if (ret == 0x01)
576 break;
577 } while (--retries > 0);
578
579 if (retries == 0) {
580 dev_err(&client->dev, "not in work mode after %dms.\n",
581 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
582 tsdata->factory_mode = true;
583 return -EIO;
584 }
585
586 kfree(tsdata->raw_buffer);
587 tsdata->raw_buffer = NULL;
588
589 /* restore parameters */
590 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
591 tsdata->threshold);
592 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
593 tsdata->gain);
594 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
595 tsdata->offset);
596 if (reg_addr->reg_report_rate)
597 edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
598 tsdata->report_rate);
599
600 enable_irq(client->irq);
601
602 return 0;
603}
604
605static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
606{
607 struct edt_ft5x06_ts_data *tsdata = data;
608
609 *mode = tsdata->factory_mode;
610
611 return 0;
612};
613
614static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
615{
616 struct edt_ft5x06_ts_data *tsdata = data;
617 int retval = 0;
618
619 if (mode > 1)
620 return -ERANGE;
621
622 mutex_lock(&tsdata->mutex);
623
624 if (mode != tsdata->factory_mode) {
625 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
626 edt_ft5x06_work_mode(tsdata);
627 }
628
629 mutex_unlock(&tsdata->mutex);
630
631 return retval;
632};
633
634DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
635 edt_ft5x06_debugfs_mode_set, "%llu\n");
636
637static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
638 char __user *buf, size_t count, loff_t *off)
639{
640 struct edt_ft5x06_ts_data *tsdata = file->private_data;
641 struct i2c_client *client = tsdata->client;
642 int retries = EDT_RAW_DATA_RETRIES;
643 int val, i, error;
644 size_t read = 0;
645 int colbytes;
646 char wrbuf[3];
647 u8 *rdbuf;
648
649 if (*off < 0 || *off >= tsdata->raw_bufsize)
650 return 0;
651
652 mutex_lock(&tsdata->mutex);
653
654 if (!tsdata->factory_mode || !tsdata->raw_buffer) {
655 error = -EIO;
656 goto out;
657 }
658
659 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
660 if (error) {
661 dev_dbg(&client->dev,
662 "failed to write 0x08 register, error %d\n", error);
663 goto out;
664 }
665
666 do {
667 msleep(EDT_RAW_DATA_DELAY);
668 val = edt_ft5x06_register_read(tsdata, 0x08);
669 if (val < 1)
670 break;
671 } while (--retries > 0);
672
673 if (val < 0) {
674 error = val;
675 dev_dbg(&client->dev,
676 "failed to read 0x08 register, error %d\n", error);
677 goto out;
678 }
679
680 if (retries == 0) {
681 dev_dbg(&client->dev,
682 "timed out waiting for register to settle\n");
683 error = -ETIMEDOUT;
684 goto out;
685 }
686
687 rdbuf = tsdata->raw_buffer;
688 colbytes = tsdata->num_y * sizeof(u16);
689
690 wrbuf[0] = 0xf5;
691 wrbuf[1] = 0x0e;
692 for (i = 0; i < tsdata->num_x; i++) {
693 wrbuf[2] = i; /* column index */
694 error = edt_ft5x06_ts_readwrite(tsdata->client,
695 sizeof(wrbuf), wrbuf,
696 colbytes, rdbuf);
697 if (error)
698 goto out;
699
700 rdbuf += colbytes;
701 }
702
703 read = min_t(size_t, count, tsdata->raw_bufsize - *off);
704 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
705 error = -EFAULT;
706 goto out;
707 }
708
709 *off += read;
710out:
711 mutex_unlock(&tsdata->mutex);
712 return error ?: read;
713};
714
715static const struct file_operations debugfs_raw_data_fops = {
716 .open = simple_open,
717 .read = edt_ft5x06_debugfs_raw_data_read,
718};
719
720static void
721edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
722 const char *debugfs_name)
723{
724 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
725 if (!tsdata->debug_dir)
726 return;
727
728 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
729 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
730
731 debugfs_create_file("mode", S_IRUSR | S_IWUSR,
732 tsdata->debug_dir, tsdata, &debugfs_mode_fops);
733 debugfs_create_file("raw_data", S_IRUSR,
734 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
735}
736
737static void
738edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
739{
740 debugfs_remove_recursive(tsdata->debug_dir);
741 kfree(tsdata->raw_buffer);
742}
743
744#else
745
746static inline void
747edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
748 const char *debugfs_name)
749{
750}
751
752static inline void
753edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
754{
755}
756
757#endif /* CONFIG_DEBUGFS */
758
759static int edt_ft5x06_ts_identify(struct i2c_client *client,
760 struct edt_ft5x06_ts_data *tsdata,
761 char *fw_version)
762{
763 u8 rdbuf[EDT_NAME_LEN];
764 char *p;
765 int error;
766 char *model_name = tsdata->name;
767
768 /* see what we find if we assume it is a M06 *
769 * if we get less than EDT_NAME_LEN, we don't want
770 * to have garbage in there
771 */
772 memset(rdbuf, 0, sizeof(rdbuf));
773 error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
774 EDT_NAME_LEN - 1, rdbuf);
775 if (error)
776 return error;
777
778 /* if we find something consistent, stay with that assumption
779 * at least M09 won't send 3 bytes here
780 */
781 if (!(strncasecmp(rdbuf + 1, "EP0", 3))) {
782 tsdata->version = M06;
783
784 /* remove last '$' end marker */
785 rdbuf[EDT_NAME_LEN - 1] = '\0';
786 if (rdbuf[EDT_NAME_LEN - 2] == '$')
787 rdbuf[EDT_NAME_LEN - 2] = '\0';
788
789 /* look for Model/Version separator */
790 p = strchr(rdbuf, '*');
791 if (p)
792 *p++ = '\0';
793 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
794 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
795 } else {
796 /* since there are only two versions around (M06, M09) */
797 tsdata->version = M09;
798
799 error = edt_ft5x06_ts_readwrite(client, 1, "\xA6",
800 2, rdbuf);
801 if (error)
802 return error;
803
804 strlcpy(fw_version, rdbuf, 2);
805
806 error = edt_ft5x06_ts_readwrite(client, 1, "\xA8",
807 1, rdbuf);
808 if (error)
809 return error;
810
811 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
812 rdbuf[0] >> 4, rdbuf[0] & 0x0F);
813 }
814
815 return 0;
816}
817
818static void edt_ft5x06_ts_get_defaults(struct device *dev,
819 struct edt_ft5x06_ts_data *tsdata)
820{
821 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
822 u32 val;
823 int error;
824
825 error = device_property_read_u32(dev, "threshold", &val);
826 if (!error) {
827 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, val);
828 tsdata->threshold = val;
829 }
830
831 error = device_property_read_u32(dev, "gain", &val);
832 if (!error) {
833 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, val);
834 tsdata->gain = val;
835 }
836
837 error = device_property_read_u32(dev, "offset", &val);
838 if (!error) {
839 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, val);
840 tsdata->offset = val;
841 }
842}
843
844static void
845edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
846{
847 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
848
849 tsdata->threshold = edt_ft5x06_register_read(tsdata,
850 reg_addr->reg_threshold);
851 tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
852 tsdata->offset = edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
853 if (reg_addr->reg_report_rate != NO_REGISTER)
854 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
855 reg_addr->reg_report_rate);
856 tsdata->num_x = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_x);
857 tsdata->num_y = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_y);
858}
859
860static void
861edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
862{
863 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
864
865 switch (tsdata->version) {
866 case M06:
867 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
868 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
869 reg_addr->reg_gain = WORK_REGISTER_GAIN;
870 reg_addr->reg_offset = WORK_REGISTER_OFFSET;
871 reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
872 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
873 break;
874
875 case M09:
876 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
877 reg_addr->reg_gain = M09_REGISTER_GAIN;
878 reg_addr->reg_offset = M09_REGISTER_OFFSET;
879 reg_addr->reg_num_x = M09_REGISTER_NUM_X;
880 reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
881 break;
882 }
883}
884
885static int edt_ft5x06_ts_probe(struct i2c_client *client,
886 const struct i2c_device_id *id)
887{
888 const struct edt_i2c_chip_data *chip_data;
889 struct edt_ft5x06_ts_data *tsdata;
890 struct input_dev *input;
891 unsigned long irq_flags;
892 int error;
893 char fw_version[EDT_NAME_LEN];
894
895 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
896
897 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
898 if (!tsdata) {
899 dev_err(&client->dev, "failed to allocate driver data.\n");
900 return -ENOMEM;
901 }
902
903 chip_data = of_device_get_match_data(&client->dev);
904 if (!chip_data)
905 chip_data = (const struct edt_i2c_chip_data *)id->driver_data;
906 if (!chip_data || !chip_data->max_support_points) {
907 dev_err(&client->dev, "invalid or missing chip data\n");
908 return -EINVAL;
909 }
910
911 tsdata->max_support_points = chip_data->max_support_points;
912
913 tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
914 "reset", GPIOD_OUT_HIGH);
915 if (IS_ERR(tsdata->reset_gpio)) {
916 error = PTR_ERR(tsdata->reset_gpio);
917 dev_err(&client->dev,
918 "Failed to request GPIO reset pin, error %d\n", error);
919 return error;
920 }
921
922 tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
923 "wake", GPIOD_OUT_LOW);
924 if (IS_ERR(tsdata->wake_gpio)) {
925 error = PTR_ERR(tsdata->wake_gpio);
926 dev_err(&client->dev,
927 "Failed to request GPIO wake pin, error %d\n", error);
928 return error;
929 }
930
931 if (tsdata->wake_gpio) {
932 usleep_range(5000, 6000);
933 gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
934 }
935
936 if (tsdata->reset_gpio) {
937 usleep_range(5000, 6000);
938 gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
939 msleep(300);
940 }
941
942 input = devm_input_allocate_device(&client->dev);
943 if (!input) {
944 dev_err(&client->dev, "failed to allocate input device.\n");
945 return -ENOMEM;
946 }
947
948 mutex_init(&tsdata->mutex);
949 tsdata->client = client;
950 tsdata->input = input;
951 tsdata->factory_mode = false;
952
953 error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
954 if (error) {
955 dev_err(&client->dev, "touchscreen probe failed\n");
956 return error;
957 }
958
959 edt_ft5x06_ts_set_regs(tsdata);
960 edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
961 edt_ft5x06_ts_get_parameters(tsdata);
962
963 dev_dbg(&client->dev,
964 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
965 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
966
967 input->name = tsdata->name;
968 input->id.bustype = BUS_I2C;
969 input->dev.parent = &client->dev;
970
971 input_set_abs_params(input, ABS_MT_POSITION_X,
972 0, tsdata->num_x * 64 - 1, 0, 0);
973 input_set_abs_params(input, ABS_MT_POSITION_Y,
974 0, tsdata->num_y * 64 - 1, 0, 0);
975
976 touchscreen_parse_properties(input, true, &tsdata->prop);
977
978 error = input_mt_init_slots(input, tsdata->max_support_points,
979 INPUT_MT_DIRECT);
980 if (error) {
981 dev_err(&client->dev, "Unable to init MT slots.\n");
982 return error;
983 }
984
985 input_set_drvdata(input, tsdata);
986 i2c_set_clientdata(client, tsdata);
987
988 irq_flags = irq_get_trigger_type(client->irq);
989 if (irq_flags == IRQF_TRIGGER_NONE)
990 irq_flags = IRQF_TRIGGER_FALLING;
991 irq_flags |= IRQF_ONESHOT;
992
993 error = devm_request_threaded_irq(&client->dev, client->irq,
994 NULL, edt_ft5x06_ts_isr, irq_flags,
995 client->name, tsdata);
996 if (error) {
997 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
998 return error;
999 }
1000
1001 error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1002 if (error)
1003 return error;
1004
1005 error = input_register_device(input);
1006 if (error)
1007 goto err_remove_attrs;
1008
1009 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1010 device_init_wakeup(&client->dev, 1);
1011
1012 dev_dbg(&client->dev,
1013 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
1014 client->irq,
1015 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1,
1016 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
1017
1018 return 0;
1019
1020err_remove_attrs:
1021 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1022 return error;
1023}
1024
1025static int edt_ft5x06_ts_remove(struct i2c_client *client)
1026{
1027 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1028
1029 edt_ft5x06_ts_teardown_debugfs(tsdata);
1030 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1031
1032 return 0;
1033}
1034
1035static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev)
1036{
1037 struct i2c_client *client = to_i2c_client(dev);
1038
1039 if (device_may_wakeup(dev))
1040 enable_irq_wake(client->irq);
1041
1042 return 0;
1043}
1044
1045static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev)
1046{
1047 struct i2c_client *client = to_i2c_client(dev);
1048
1049 if (device_may_wakeup(dev))
1050 disable_irq_wake(client->irq);
1051
1052 return 0;
1053}
1054
1055static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
1056 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
1057
1058static const struct edt_i2c_chip_data edt_ft5x06_data = {
1059 .max_support_points = 5,
1060};
1061
1062static const struct edt_i2c_chip_data edt_ft5506_data = {
1063 .max_support_points = 10,
1064};
1065
1066static const struct edt_i2c_chip_data edt_ft6236_data = {
1067 .max_support_points = 2,
1068};
1069
1070static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1071 { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },
1072 { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data },
1073 /* Note no edt- prefix for compatibility with the ft6236.c driver */
1074 { .name = "ft6236", .driver_data = (long)&edt_ft6236_data },
1075 { /* sentinel */ }
1076};
1077MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1078
1079#ifdef CONFIG_OF
1080static const struct of_device_id edt_ft5x06_of_match[] = {
1081 { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data },
1082 { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data },
1083 { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
1084 { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
1085 /* Note focaltech vendor prefix for compatibility with ft6236.c */
1086 { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },
1087 { /* sentinel */ }
1088};
1089MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1090#endif
1091
1092static struct i2c_driver edt_ft5x06_ts_driver = {
1093 .driver = {
1094 .name = "edt_ft5x06",
1095 .of_match_table = of_match_ptr(edt_ft5x06_of_match),
1096 .pm = &edt_ft5x06_ts_pm_ops,
1097 },
1098 .id_table = edt_ft5x06_ts_id,
1099 .probe = edt_ft5x06_ts_probe,
1100 .remove = edt_ft5x06_ts_remove,
1101};
1102
1103module_i2c_driver(edt_ft5x06_ts_driver);
1104
1105MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
1106MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1107MODULE_LICENSE("GPL");