1
2
3
4
5
6
7
8
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/input.h>
13#include <linux/input/mt.h>
14#include <linux/i2c.h>
15#include <linux/slab.h>
16#include <linux/delay.h>
17#include <linux/interrupt.h>
18#include <linux/gpio.h>
19#include <linux/gpio/consumer.h>
20#include <linux/errno.h>
21#include <linux/acpi.h>
22#include <linux/input/touchscreen.h>
23#include <asm/unaligned.h>
24
25
26#define ILITEK_TS_NAME "ilitek_ts"
27#define BL_V1_8 0x108
28#define BL_V1_7 0x107
29#define BL_V1_6 0x106
30
31#define ILITEK_TP_CMD_GET_TP_RES 0x20
32#define ILITEK_TP_CMD_GET_SCRN_RES 0x21
33#define ILITEK_TP_CMD_SET_IC_SLEEP 0x30
34#define ILITEK_TP_CMD_SET_IC_WAKE 0x31
35#define ILITEK_TP_CMD_GET_FW_VER 0x40
36#define ILITEK_TP_CMD_GET_PRL_VER 0x42
37#define ILITEK_TP_CMD_GET_MCU_VER 0x61
38#define ILITEK_TP_CMD_GET_IC_MODE 0xC0
39
40#define REPORT_COUNT_ADDRESS 61
41#define ILITEK_SUPPORT_MAX_POINT 40
42
43struct ilitek_protocol_info {
44 u16 ver;
45 u8 ver_major;
46};
47
48struct ilitek_ts_data {
49 struct i2c_client *client;
50 struct gpio_desc *reset_gpio;
51 struct input_dev *input_dev;
52 struct touchscreen_properties prop;
53
54 const struct ilitek_protocol_map *ptl_cb_func;
55 struct ilitek_protocol_info ptl;
56
57 char product_id[30];
58 u16 mcu_ver;
59 u8 ic_mode;
60 u8 firmware_ver[8];
61
62 s32 reset_time;
63 s32 screen_max_x;
64 s32 screen_max_y;
65 s32 screen_min_x;
66 s32 screen_min_y;
67 s32 max_tp;
68};
69
70struct ilitek_protocol_map {
71 u16 cmd;
72 const char *name;
73 int (*func)(struct ilitek_ts_data *ts, u16 cmd, u8 *inbuf, u8 *outbuf);
74};
75
76enum ilitek_cmds {
77
78 GET_PTL_VER = 0,
79 GET_FW_VER,
80 GET_SCRN_RES,
81 GET_TP_RES,
82 GET_IC_MODE,
83 GET_MCU_VER,
84 SET_IC_SLEEP,
85 SET_IC_WAKE,
86
87
88 MAX_CMD_CNT
89};
90
91
92static int ilitek_i2c_write_and_read(struct ilitek_ts_data *ts,
93 u8 *cmd, int write_len, int delay,
94 u8 *data, int read_len)
95{
96 int error;
97 struct i2c_client *client = ts->client;
98 struct i2c_msg msgs[] = {
99 {
100 .addr = client->addr,
101 .flags = 0,
102 .len = write_len,
103 .buf = cmd,
104 },
105 {
106 .addr = client->addr,
107 .flags = I2C_M_RD,
108 .len = read_len,
109 .buf = data,
110 },
111 };
112
113 if (delay == 0 && write_len > 0 && read_len > 0) {
114 error = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
115 if (error < 0)
116 return error;
117 } else {
118 if (write_len > 0) {
119 error = i2c_transfer(client->adapter, msgs, 1);
120 if (error < 0)
121 return error;
122 }
123 if (delay > 0)
124 mdelay(delay);
125
126 if (read_len > 0) {
127 error = i2c_transfer(client->adapter, msgs + 1, 1);
128 if (error < 0)
129 return error;
130 }
131 }
132
133 return 0;
134}
135
136
137static void ilitek_touch_down(struct ilitek_ts_data *ts, unsigned int id,
138 unsigned int x, unsigned int y)
139{
140 struct input_dev *input = ts->input_dev;
141
142 input_mt_slot(input, id);
143 input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
144
145 touchscreen_report_pos(input, &ts->prop, x, y, true);
146}
147
148static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts)
149{
150 int error = 0;
151 u8 buf[512];
152 int packet_len = 5;
153 int packet_max_point = 10;
154 int report_max_point;
155 int i, count;
156 struct input_dev *input = ts->input_dev;
157 struct device *dev = &ts->client->dev;
158 unsigned int x, y, status, id;
159
160 error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, buf, 64);
161 if (error) {
162 dev_err(dev, "get touch info failed, err:%d\n", error);
163 goto err_sync_frame;
164 }
165
166 report_max_point = buf[REPORT_COUNT_ADDRESS];
167 if (report_max_point > ts->max_tp) {
168 dev_err(dev, "FW report max point:%d > panel info. max:%d\n",
169 report_max_point, ts->max_tp);
170 error = -EINVAL;
171 goto err_sync_frame;
172 }
173
174 count = DIV_ROUND_UP(report_max_point, packet_max_point);
175 for (i = 1; i < count; i++) {
176 error = ilitek_i2c_write_and_read(ts, NULL, 0, 0,
177 buf + i * 64, 64);
178 if (error) {
179 dev_err(dev, "get touch info. failed, cnt:%d, err:%d\n",
180 count, error);
181 goto err_sync_frame;
182 }
183 }
184
185 for (i = 0; i < report_max_point; i++) {
186 status = buf[i * packet_len + 1] & 0x40;
187 if (!status)
188 continue;
189
190 id = buf[i * packet_len + 1] & 0x3F;
191
192 x = get_unaligned_le16(buf + i * packet_len + 2);
193 y = get_unaligned_le16(buf + i * packet_len + 4);
194
195 if (x > ts->screen_max_x || x < ts->screen_min_x ||
196 y > ts->screen_max_y || y < ts->screen_min_y) {
197 dev_warn(dev, "invalid position, X[%d,%u,%d], Y[%d,%u,%d]\n",
198 ts->screen_min_x, x, ts->screen_max_x,
199 ts->screen_min_y, y, ts->screen_max_y);
200 continue;
201 }
202
203 ilitek_touch_down(ts, id, x, y);
204 }
205
206err_sync_frame:
207 input_mt_sync_frame(input);
208 input_sync(input);
209 return error;
210}
211
212
213static int api_protocol_set_cmd(struct ilitek_ts_data *ts,
214 u16 idx, u8 *inbuf, u8 *outbuf)
215{
216 u16 cmd;
217 int error;
218
219 if (idx >= MAX_CMD_CNT)
220 return -EINVAL;
221
222 cmd = ts->ptl_cb_func[idx].cmd;
223 error = ts->ptl_cb_func[idx].func(ts, cmd, inbuf, outbuf);
224 if (error)
225 return error;
226
227 return 0;
228}
229
230static int api_protocol_get_ptl_ver(struct ilitek_ts_data *ts,
231 u16 cmd, u8 *inbuf, u8 *outbuf)
232{
233 int error;
234 u8 buf[64];
235
236 buf[0] = cmd;
237 error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 3);
238 if (error)
239 return error;
240
241 ts->ptl.ver = get_unaligned_be16(outbuf);
242 ts->ptl.ver_major = outbuf[0];
243
244 return 0;
245}
246
247static int api_protocol_get_mcu_ver(struct ilitek_ts_data *ts,
248 u16 cmd, u8 *inbuf, u8 *outbuf)
249{
250 int error;
251 u8 buf[64];
252
253 buf[0] = cmd;
254 error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 32);
255 if (error)
256 return error;
257
258 ts->mcu_ver = get_unaligned_le16(outbuf);
259 memset(ts->product_id, 0, sizeof(ts->product_id));
260 memcpy(ts->product_id, outbuf + 6, 26);
261
262 return 0;
263}
264
265static int api_protocol_get_fw_ver(struct ilitek_ts_data *ts,
266 u16 cmd, u8 *inbuf, u8 *outbuf)
267{
268 int error;
269 u8 buf[64];
270
271 buf[0] = cmd;
272 error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
273 if (error)
274 return error;
275
276 memcpy(ts->firmware_ver, outbuf, 8);
277
278 return 0;
279}
280
281static int api_protocol_get_scrn_res(struct ilitek_ts_data *ts,
282 u16 cmd, u8 *inbuf, u8 *outbuf)
283{
284 int error;
285 u8 buf[64];
286
287 buf[0] = cmd;
288 error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
289 if (error)
290 return error;
291
292 ts->screen_min_x = get_unaligned_le16(outbuf);
293 ts->screen_min_y = get_unaligned_le16(outbuf + 2);
294 ts->screen_max_x = get_unaligned_le16(outbuf + 4);
295 ts->screen_max_y = get_unaligned_le16(outbuf + 6);
296
297 return 0;
298}
299
300static int api_protocol_get_tp_res(struct ilitek_ts_data *ts,
301 u16 cmd, u8 *inbuf, u8 *outbuf)
302{
303 int error;
304 u8 buf[64];
305
306 buf[0] = cmd;
307 error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 15);
308 if (error)
309 return error;
310
311 ts->max_tp = outbuf[8];
312 if (ts->max_tp > ILITEK_SUPPORT_MAX_POINT) {
313 dev_err(&ts->client->dev, "Invalid MAX_TP:%d from FW\n",
314 ts->max_tp);
315 return -EINVAL;
316 }
317
318 return 0;
319}
320
321static int api_protocol_get_ic_mode(struct ilitek_ts_data *ts,
322 u16 cmd, u8 *inbuf, u8 *outbuf)
323{
324 int error;
325 u8 buf[64];
326
327 buf[0] = cmd;
328 error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 2);
329 if (error)
330 return error;
331
332 ts->ic_mode = outbuf[0];
333 return 0;
334}
335
336static int api_protocol_set_ic_sleep(struct ilitek_ts_data *ts,
337 u16 cmd, u8 *inbuf, u8 *outbuf)
338{
339 u8 buf[64];
340
341 buf[0] = cmd;
342 return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
343}
344
345static int api_protocol_set_ic_wake(struct ilitek_ts_data *ts,
346 u16 cmd, u8 *inbuf, u8 *outbuf)
347{
348 u8 buf[64];
349
350 buf[0] = cmd;
351 return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
352}
353
354static const struct ilitek_protocol_map ptl_func_map[] = {
355
356 [GET_PTL_VER] = {
357 ILITEK_TP_CMD_GET_PRL_VER, "GET_PTL_VER",
358 api_protocol_get_ptl_ver
359 },
360 [GET_FW_VER] = {
361 ILITEK_TP_CMD_GET_FW_VER, "GET_FW_VER",
362 api_protocol_get_fw_ver
363 },
364 [GET_SCRN_RES] = {
365 ILITEK_TP_CMD_GET_SCRN_RES, "GET_SCRN_RES",
366 api_protocol_get_scrn_res
367 },
368 [GET_TP_RES] = {
369 ILITEK_TP_CMD_GET_TP_RES, "GET_TP_RES",
370 api_protocol_get_tp_res
371 },
372 [GET_IC_MODE] = {
373 ILITEK_TP_CMD_GET_IC_MODE, "GET_IC_MODE",
374 api_protocol_get_ic_mode
375 },
376 [GET_MCU_VER] = {
377 ILITEK_TP_CMD_GET_MCU_VER, "GET_MOD_VER",
378 api_protocol_get_mcu_ver
379 },
380 [SET_IC_SLEEP] = {
381 ILITEK_TP_CMD_SET_IC_SLEEP, "SET_IC_SLEEP",
382 api_protocol_set_ic_sleep
383 },
384 [SET_IC_WAKE] = {
385 ILITEK_TP_CMD_SET_IC_WAKE, "SET_IC_WAKE",
386 api_protocol_set_ic_wake
387 },
388};
389
390
391static void ilitek_reset(struct ilitek_ts_data *ts, int delay)
392{
393 if (ts->reset_gpio) {
394 gpiod_set_value(ts->reset_gpio, 1);
395 mdelay(10);
396 gpiod_set_value(ts->reset_gpio, 0);
397 mdelay(delay);
398 }
399}
400
401static int ilitek_protocol_init(struct ilitek_ts_data *ts)
402{
403 int error;
404 u8 outbuf[64];
405
406 ts->ptl_cb_func = ptl_func_map;
407 ts->reset_time = 600;
408
409 error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
410 if (error)
411 return error;
412
413
414 if (ts->ptl.ver_major == 0x3 ||
415 ts->ptl.ver == BL_V1_6 ||
416 ts->ptl.ver == BL_V1_7)
417 return -EINVAL;
418
419 return 0;
420}
421
422static int ilitek_read_tp_info(struct ilitek_ts_data *ts, bool boot)
423{
424 u8 outbuf[256];
425 int error;
426
427 error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
428 if (error)
429 return error;
430
431 error = api_protocol_set_cmd(ts, GET_MCU_VER, NULL, outbuf);
432 if (error)
433 return error;
434
435 error = api_protocol_set_cmd(ts, GET_FW_VER, NULL, outbuf);
436 if (error)
437 return error;
438
439 if (boot) {
440 error = api_protocol_set_cmd(ts, GET_SCRN_RES, NULL,
441 outbuf);
442 if (error)
443 return error;
444 }
445
446 error = api_protocol_set_cmd(ts, GET_TP_RES, NULL, outbuf);
447 if (error)
448 return error;
449
450 error = api_protocol_set_cmd(ts, GET_IC_MODE, NULL, outbuf);
451 if (error)
452 return error;
453
454 return 0;
455}
456
457static int ilitek_input_dev_init(struct device *dev, struct ilitek_ts_data *ts)
458{
459 int error;
460 struct input_dev *input;
461
462 input = devm_input_allocate_device(dev);
463 if (!input)
464 return -ENOMEM;
465
466 ts->input_dev = input;
467 input->name = ILITEK_TS_NAME;
468 input->id.bustype = BUS_I2C;
469
470 __set_bit(INPUT_PROP_DIRECT, input->propbit);
471
472 input_set_abs_params(input, ABS_MT_POSITION_X,
473 ts->screen_min_x, ts->screen_max_x, 0, 0);
474 input_set_abs_params(input, ABS_MT_POSITION_Y,
475 ts->screen_min_y, ts->screen_max_y, 0, 0);
476
477 touchscreen_parse_properties(input, true, &ts->prop);
478
479 error = input_mt_init_slots(input, ts->max_tp,
480 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
481 if (error) {
482 dev_err(dev, "initialize MT slots failed, err:%d\n", error);
483 return error;
484 }
485
486 error = input_register_device(input);
487 if (error) {
488 dev_err(dev, "register input device failed, err:%d\n", error);
489 return error;
490 }
491
492 return 0;
493}
494
495static irqreturn_t ilitek_i2c_isr(int irq, void *dev_id)
496{
497 struct ilitek_ts_data *ts = dev_id;
498 int error;
499
500 error = ilitek_process_and_report_v6(ts);
501 if (error < 0) {
502 dev_err(&ts->client->dev, "[%s] err:%d\n", __func__, error);
503 return IRQ_NONE;
504 }
505
506 return IRQ_HANDLED;
507}
508
509static ssize_t firmware_version_show(struct device *dev,
510 struct device_attribute *attr, char *buf)
511{
512 struct i2c_client *client = to_i2c_client(dev);
513 struct ilitek_ts_data *ts = i2c_get_clientdata(client);
514
515 return scnprintf(buf, PAGE_SIZE,
516 "fw version: [%02X%02X.%02X%02X.%02X%02X.%02X%02X]\n",
517 ts->firmware_ver[0], ts->firmware_ver[1],
518 ts->firmware_ver[2], ts->firmware_ver[3],
519 ts->firmware_ver[4], ts->firmware_ver[5],
520 ts->firmware_ver[6], ts->firmware_ver[7]);
521}
522static DEVICE_ATTR_RO(firmware_version);
523
524static ssize_t product_id_show(struct device *dev,
525 struct device_attribute *attr, char *buf)
526{
527 struct i2c_client *client = to_i2c_client(dev);
528 struct ilitek_ts_data *ts = i2c_get_clientdata(client);
529
530 return scnprintf(buf, PAGE_SIZE, "product id: [%04X], module: [%s]\n",
531 ts->mcu_ver, ts->product_id);
532}
533static DEVICE_ATTR_RO(product_id);
534
535static struct attribute *ilitek_sysfs_attrs[] = {
536 &dev_attr_firmware_version.attr,
537 &dev_attr_product_id.attr,
538 NULL
539};
540
541static struct attribute_group ilitek_attrs_group = {
542 .attrs = ilitek_sysfs_attrs,
543};
544
545static int ilitek_ts_i2c_probe(struct i2c_client *client,
546 const struct i2c_device_id *id)
547{
548 struct ilitek_ts_data *ts;
549 struct device *dev = &client->dev;
550 int error;
551
552 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
553 dev_err(dev, "i2c check functionality failed\n");
554 return -ENXIO;
555 }
556
557 ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
558 if (!ts)
559 return -ENOMEM;
560
561 ts->client = client;
562 i2c_set_clientdata(client, ts);
563
564 ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
565 if (IS_ERR(ts->reset_gpio)) {
566 error = PTR_ERR(ts->reset_gpio);
567 dev_err(dev, "request gpiod failed: %d", error);
568 return error;
569 }
570
571 ilitek_reset(ts, 1000);
572
573 error = ilitek_protocol_init(ts);
574 if (error) {
575 dev_err(dev, "protocol init failed: %d", error);
576 return error;
577 }
578
579 error = ilitek_read_tp_info(ts, true);
580 if (error) {
581 dev_err(dev, "read tp info failed: %d", error);
582 return error;
583 }
584
585 error = ilitek_input_dev_init(dev, ts);
586 if (error) {
587 dev_err(dev, "input dev init failed: %d", error);
588 return error;
589 }
590
591 error = devm_request_threaded_irq(dev, ts->client->irq,
592 NULL, ilitek_i2c_isr, IRQF_ONESHOT,
593 "ilitek_touch_irq", ts);
594 if (error) {
595 dev_err(dev, "request threaded irq failed: %d\n", error);
596 return error;
597 }
598
599 error = devm_device_add_group(dev, &ilitek_attrs_group);
600 if (error) {
601 dev_err(dev, "sysfs create group failed: %d\n", error);
602 return error;
603 }
604
605 return 0;
606}
607
608static int __maybe_unused ilitek_suspend(struct device *dev)
609{
610 struct i2c_client *client = to_i2c_client(dev);
611 struct ilitek_ts_data *ts = i2c_get_clientdata(client);
612 int error;
613
614 disable_irq(client->irq);
615
616 if (!device_may_wakeup(dev)) {
617 error = api_protocol_set_cmd(ts, SET_IC_SLEEP, NULL, NULL);
618 if (error)
619 return error;
620 }
621
622 return 0;
623}
624
625static int __maybe_unused ilitek_resume(struct device *dev)
626{
627 struct i2c_client *client = to_i2c_client(dev);
628 struct ilitek_ts_data *ts = i2c_get_clientdata(client);
629 int error;
630
631 if (!device_may_wakeup(dev)) {
632 error = api_protocol_set_cmd(ts, SET_IC_WAKE, NULL, NULL);
633 if (error)
634 return error;
635
636 ilitek_reset(ts, ts->reset_time);
637 }
638
639 enable_irq(client->irq);
640
641 return 0;
642}
643
644static SIMPLE_DEV_PM_OPS(ilitek_pm_ops, ilitek_suspend, ilitek_resume);
645
646static const struct i2c_device_id ilitek_ts_i2c_id[] = {
647 { ILITEK_TS_NAME, 0 },
648 { },
649};
650MODULE_DEVICE_TABLE(i2c, ilitek_ts_i2c_id);
651
652#ifdef CONFIG_ACPI
653static const struct acpi_device_id ilitekts_acpi_id[] = {
654 { "ILTK0001", 0 },
655 { },
656};
657MODULE_DEVICE_TABLE(acpi, ilitekts_acpi_id);
658#endif
659
660#ifdef CONFIG_OF
661static const struct of_device_id ilitek_ts_i2c_match[] = {
662 {.compatible = "ilitek,ili2130",},
663 {.compatible = "ilitek,ili2131",},
664 {.compatible = "ilitek,ili2132",},
665 {.compatible = "ilitek,ili2316",},
666 {.compatible = "ilitek,ili2322",},
667 {.compatible = "ilitek,ili2323",},
668 {.compatible = "ilitek,ili2326",},
669 {.compatible = "ilitek,ili2520",},
670 {.compatible = "ilitek,ili2521",},
671 { },
672};
673MODULE_DEVICE_TABLE(of, ilitek_ts_i2c_match);
674#endif
675
676static struct i2c_driver ilitek_ts_i2c_driver = {
677 .driver = {
678 .name = ILITEK_TS_NAME,
679 .pm = &ilitek_pm_ops,
680 .of_match_table = of_match_ptr(ilitek_ts_i2c_match),
681 .acpi_match_table = ACPI_PTR(ilitekts_acpi_id),
682 },
683 .probe = ilitek_ts_i2c_probe,
684 .id_table = ilitek_ts_i2c_id,
685};
686module_i2c_driver(ilitek_ts_i2c_driver);
687
688MODULE_AUTHOR("ILITEK");
689MODULE_DESCRIPTION("ILITEK I2C Touchscreen Driver");
690MODULE_LICENSE("GPL");
691
