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14#include <linux/acpi.h>
15#include <linux/delay.h>
16#include <linux/firmware.h>
17#include <linux/gpio/consumer.h>
18#include <linux/i2c.h>
19#include <linux/input.h>
20#include <linux/input/mt.h>
21#include <linux/interrupt.h>
22#include <linux/module.h>
23#include <linux/of.h>
24#include <linux/regulator/consumer.h>
25#include <linux/slab.h>
26#include <asm/unaligned.h>
27
28
29#define RM_BOOT_BLDR 0x02
30#define RM_BOOT_MAIN 0x03
31
32
33#define RM_CMD_BOOT_PAGE_WRT 0x0B
34#define RM_CMD_BOOT_WRT 0x11
35#define RM_CMD_BOOT_ACK 0x22
36#define RM_CMD_BOOT_CHK 0x33
37#define RM_CMD_BOOT_READ 0x44
38
39#define RM_BOOT_RDY 0xFF
40
41
42#define RM_CMD_QUERY_BANK 0x2B
43#define RM_CMD_DATA_BANK 0x4D
44#define RM_CMD_ENTER_SLEEP 0x4E
45#define RM_CMD_BANK_SWITCH 0xAA
46
47#define RM_RESET_MSG_ADDR 0x40000004
48
49#define RM_MAX_READ_SIZE 56
50#define RM_PACKET_CRC_SIZE 2
51
52
53#define RM_MAX_RETRIES 3
54#define RM_RETRY_DELAY_MS 20
55#define RM_MAX_TOUCH_NUM 10
56#define RM_BOOT_DELAY_MS 100
57
58
59#define RM_CONTACT_STATE_POS 0
60#define RM_CONTACT_X_POS 1
61#define RM_CONTACT_Y_POS 3
62#define RM_CONTACT_PRESSURE_POS 5
63#define RM_CONTACT_WIDTH_X_POS 6
64#define RM_CONTACT_WIDTH_Y_POS 7
65
66
67#define RM_BL_WRT_CMD_SIZE 3
68#define RM_BL_WRT_PKG_SIZE 32
69#define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE)
70#define RM_FW_PAGE_SIZE 128
71#define RM_MAX_FW_RETRIES 30
72#define RM_MAX_FW_SIZE 0xD000
73
74#define RM_POWERON_DELAY_USEC 500
75#define RM_RESET_DELAY_MSEC 50
76
77enum raydium_bl_cmd {
78 BL_HEADER = 0,
79 BL_PAGE_STR,
80 BL_PKG_IDX,
81 BL_DATA_STR,
82};
83
84enum raydium_bl_ack {
85 RAYDIUM_ACK_NULL = 0,
86 RAYDIUM_WAIT_READY,
87 RAYDIUM_PATH_READY,
88};
89
90enum raydium_boot_mode {
91 RAYDIUM_TS_MAIN = 0,
92 RAYDIUM_TS_BLDR,
93};
94
95
96struct raydium_data_info {
97 __le32 data_bank_addr;
98 u8 pkg_size;
99 u8 tp_info_size;
100};
101
102struct raydium_info {
103 __le32 hw_ver;
104 u8 main_ver;
105 u8 sub_ver;
106 __le16 ft_ver;
107 u8 x_num;
108 u8 y_num;
109 __le16 x_max;
110 __le16 y_max;
111 u8 x_res;
112 u8 y_res;
113};
114
115
116struct raydium_data {
117 struct i2c_client *client;
118 struct input_dev *input;
119
120 struct regulator *avdd;
121 struct regulator *vccio;
122 struct gpio_desc *reset_gpio;
123
124 struct raydium_info info;
125
126 struct mutex sysfs_mutex;
127
128 u8 *report_data;
129
130 u32 data_bank_addr;
131 u8 report_size;
132 u8 contact_size;
133 u8 pkg_size;
134
135 enum raydium_boot_mode boot_mode;
136
137 bool wake_irq_enabled;
138};
139
140
141
142
143
144struct __packed raydium_bank_switch_header {
145 u8 cmd;
146 __be32 be_addr;
147};
148
149static int raydium_i2c_xfer(struct i2c_client *client, u32 addr,
150 struct i2c_msg *xfer, size_t xfer_count)
151{
152 int ret;
153
154
155
156
157 int xfer_start_idx = (addr > 0xff) ? 0 : 1;
158 xfer_count -= xfer_start_idx;
159
160 ret = i2c_transfer(client->adapter, &xfer[xfer_start_idx], xfer_count);
161 if (likely(ret == xfer_count))
162 return 0;
163
164 return ret < 0 ? ret : -EIO;
165}
166
167static int raydium_i2c_send(struct i2c_client *client,
168 u32 addr, const void *data, size_t len)
169{
170 int tries = 0;
171 int error;
172 u8 *tx_buf;
173 u8 reg_addr = addr & 0xff;
174
175 tx_buf = kmalloc(len + 1, GFP_KERNEL);
176 if (!tx_buf)
177 return -ENOMEM;
178
179 tx_buf[0] = reg_addr;
180 memcpy(tx_buf + 1, data, len);
181
182 do {
183 struct raydium_bank_switch_header header = {
184 .cmd = RM_CMD_BANK_SWITCH,
185 .be_addr = cpu_to_be32(addr),
186 };
187
188
189
190
191
192
193
194
195
196
197
198 struct i2c_msg xfer[] = {
199 {
200 .addr = client->addr,
201 .len = sizeof(header),
202 .buf = (u8 *)&header,
203 },
204 {
205 .addr = client->addr,
206 .len = len + 1,
207 .buf = tx_buf,
208 },
209 };
210
211 error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
212 if (likely(!error))
213 return 0;
214
215 msleep(RM_RETRY_DELAY_MS);
216 } while (++tries < RM_MAX_RETRIES);
217
218 dev_err(&client->dev, "%s failed: %d\n", __func__, error);
219 return error;
220}
221
222static int raydium_i2c_read(struct i2c_client *client,
223 u32 addr, void *data, size_t len)
224{
225 int error;
226
227 while (len) {
228 u8 reg_addr = addr & 0xff;
229 struct raydium_bank_switch_header header = {
230 .cmd = RM_CMD_BANK_SWITCH,
231 .be_addr = cpu_to_be32(addr),
232 };
233 size_t xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
234
235
236
237
238
239
240
241
242
243
244
245 struct i2c_msg xfer[] = {
246 {
247 .addr = client->addr,
248 .len = sizeof(header),
249 .buf = (u8 *)&header,
250 },
251 {
252 .addr = client->addr,
253 .len = 1,
254 .buf = ®_addr,
255 },
256 {
257 .addr = client->addr,
258 .len = xfer_len,
259 .buf = data,
260 .flags = I2C_M_RD,
261 }
262 };
263
264 error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
265 if (unlikely(error))
266 return error;
267
268 len -= xfer_len;
269 data += xfer_len;
270 addr += xfer_len;
271 }
272
273 return 0;
274}
275
276static int raydium_i2c_sw_reset(struct i2c_client *client)
277{
278 const u8 soft_rst_cmd = 0x01;
279 int error;
280
281 error = raydium_i2c_send(client, RM_RESET_MSG_ADDR, &soft_rst_cmd,
282 sizeof(soft_rst_cmd));
283 if (error) {
284 dev_err(&client->dev, "software reset failed: %d\n", error);
285 return error;
286 }
287
288 msleep(RM_RESET_DELAY_MSEC);
289
290 return 0;
291}
292
293static int raydium_i2c_query_ts_info(struct raydium_data *ts)
294{
295 struct i2c_client *client = ts->client;
296 struct raydium_data_info data_info;
297 __le32 query_bank_addr;
298
299 int error, retry_cnt;
300
301 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
302 error = raydium_i2c_read(client, RM_CMD_DATA_BANK,
303 &data_info, sizeof(data_info));
304 if (error)
305 continue;
306
307
308
309
310
311
312 if (ts->report_data && ts->pkg_size != data_info.pkg_size) {
313 dev_warn(&client->dev,
314 "report size changes, was: %d, new: %d\n",
315 ts->pkg_size, data_info.pkg_size);
316 } else {
317 ts->pkg_size = data_info.pkg_size;
318 ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE;
319 }
320
321 ts->contact_size = data_info.tp_info_size;
322 ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr);
323
324 dev_dbg(&client->dev,
325 "data_bank_addr: %#08x, report_size: %d, contact_size: %d\n",
326 ts->data_bank_addr, ts->report_size, ts->contact_size);
327
328 error = raydium_i2c_read(client, RM_CMD_QUERY_BANK,
329 &query_bank_addr,
330 sizeof(query_bank_addr));
331 if (error)
332 continue;
333
334 error = raydium_i2c_read(client, le32_to_cpu(query_bank_addr),
335 &ts->info, sizeof(ts->info));
336 if (error)
337 continue;
338
339 return 0;
340 }
341
342 dev_err(&client->dev, "failed to query device parameters: %d\n", error);
343 return error;
344}
345
346static int raydium_i2c_check_fw_status(struct raydium_data *ts)
347{
348 struct i2c_client *client = ts->client;
349 static const u8 bl_ack = 0x62;
350 static const u8 main_ack = 0x66;
351 u8 buf[4];
352 int error;
353
354 error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf));
355 if (!error) {
356 if (buf[0] == bl_ack)
357 ts->boot_mode = RAYDIUM_TS_BLDR;
358 else if (buf[0] == main_ack)
359 ts->boot_mode = RAYDIUM_TS_MAIN;
360 return 0;
361 }
362
363 return error;
364}
365
366static int raydium_i2c_initialize(struct raydium_data *ts)
367{
368 struct i2c_client *client = ts->client;
369 int error, retry_cnt;
370
371 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
372
373 msleep(RM_BOOT_DELAY_MS);
374
375 error = raydium_i2c_check_fw_status(ts);
376 if (error) {
377 dev_err(&client->dev,
378 "failed to read 'hello' packet: %d\n", error);
379 continue;
380 }
381
382 if (ts->boot_mode == RAYDIUM_TS_BLDR ||
383 ts->boot_mode == RAYDIUM_TS_MAIN) {
384 break;
385 }
386 }
387
388 if (error)
389 ts->boot_mode = RAYDIUM_TS_BLDR;
390
391 if (ts->boot_mode == RAYDIUM_TS_BLDR) {
392 ts->info.hw_ver = cpu_to_le32(0xffffffffUL);
393 ts->info.main_ver = 0xff;
394 ts->info.sub_ver = 0xff;
395 } else {
396 raydium_i2c_query_ts_info(ts);
397 }
398
399 return error;
400}
401
402static int raydium_i2c_bl_chk_state(struct i2c_client *client,
403 enum raydium_bl_ack state)
404{
405 static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 };
406 u8 rbuf[sizeof(ack_ok)];
407 u8 retry;
408 int error;
409
410 for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) {
411 switch (state) {
412 case RAYDIUM_ACK_NULL:
413 return 0;
414
415 case RAYDIUM_WAIT_READY:
416 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
417 &rbuf[0], 1);
418 if (!error && rbuf[0] == RM_BOOT_RDY)
419 return 0;
420
421 break;
422
423 case RAYDIUM_PATH_READY:
424 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
425 rbuf, sizeof(rbuf));
426 if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok)))
427 return 0;
428
429 break;
430
431 default:
432 dev_err(&client->dev, "%s: invalid target state %d\n",
433 __func__, state);
434 return -EINVAL;
435 }
436
437 msleep(20);
438 }
439
440 return -ETIMEDOUT;
441}
442
443static int raydium_i2c_write_object(struct i2c_client *client,
444 const void *data, size_t len,
445 enum raydium_bl_ack state)
446{
447 int error;
448 static const u8 cmd[] = { 0xFF, 0x39 };
449
450 error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
451 if (error) {
452 dev_err(&client->dev, "WRT obj command failed: %d\n",
453 error);
454 return error;
455 }
456
457 error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, cmd, sizeof(cmd));
458 if (error) {
459 dev_err(&client->dev, "Ack obj command failed: %d\n", error);
460 return error;
461 }
462
463 error = raydium_i2c_bl_chk_state(client, state);
464 if (error) {
465 dev_err(&client->dev, "BL check state failed: %d\n", error);
466 return error;
467 }
468 return 0;
469}
470
471static int raydium_i2c_boot_trigger(struct i2c_client *client)
472{
473 static const u8 cmd[7][6] = {
474 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 },
475 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
476 { 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 },
477 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
478 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 },
479 { 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 },
480 { 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 },
481 };
482 int i;
483 int error;
484
485 for (i = 0; i < 7; i++) {
486 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
487 RAYDIUM_WAIT_READY);
488 if (error) {
489 dev_err(&client->dev,
490 "boot trigger failed at step %d: %d\n",
491 i, error);
492 return error;
493 }
494 }
495
496 return 0;
497}
498
499static int raydium_i2c_fw_trigger(struct i2c_client *client)
500{
501 static const u8 cmd[5][11] = {
502 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 },
503 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
504 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
505 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
506 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
507 };
508 int i;
509 int error;
510
511 for (i = 0; i < 5; i++) {
512 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
513 RAYDIUM_ACK_NULL);
514 if (error) {
515 dev_err(&client->dev,
516 "fw trigger failed at step %d: %d\n",
517 i, error);
518 return error;
519 }
520 }
521
522 return 0;
523}
524
525static int raydium_i2c_check_path(struct i2c_client *client)
526{
527 static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 };
528 int error;
529
530 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
531 RAYDIUM_PATH_READY);
532 if (error) {
533 dev_err(&client->dev, "check path command failed: %d\n", error);
534 return error;
535 }
536
537 return 0;
538}
539
540static int raydium_i2c_enter_bl(struct i2c_client *client)
541{
542 static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 };
543 int error;
544
545 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
546 RAYDIUM_ACK_NULL);
547 if (error) {
548 dev_err(&client->dev, "enter bl command failed: %d\n", error);
549 return error;
550 }
551
552 msleep(RM_BOOT_DELAY_MS);
553 return 0;
554}
555
556static int raydium_i2c_leave_bl(struct i2c_client *client)
557{
558 static const u8 leave_cmd[] = { 0x05, 0x00 };
559 int error;
560
561 error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd),
562 RAYDIUM_ACK_NULL);
563 if (error) {
564 dev_err(&client->dev, "leave bl command failed: %d\n", error);
565 return error;
566 }
567
568 msleep(RM_BOOT_DELAY_MS);
569 return 0;
570}
571
572static int raydium_i2c_write_checksum(struct i2c_client *client,
573 size_t length, u16 checksum)
574{
575 u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 };
576 int error;
577
578 put_unaligned_le16(length, &checksum_cmd[3]);
579 put_unaligned_le16(checksum, &checksum_cmd[5]);
580
581 error = raydium_i2c_write_object(client,
582 checksum_cmd, sizeof(checksum_cmd),
583 RAYDIUM_ACK_NULL);
584 if (error) {
585 dev_err(&client->dev, "failed to write checksum: %d\n",
586 error);
587 return error;
588 }
589
590 return 0;
591}
592
593static int raydium_i2c_disable_watch_dog(struct i2c_client *client)
594{
595 static const u8 cmd[] = { 0x0A, 0xAA };
596 int error;
597
598 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
599 RAYDIUM_WAIT_READY);
600 if (error) {
601 dev_err(&client->dev, "disable watchdog command failed: %d\n",
602 error);
603 return error;
604 }
605
606 return 0;
607}
608
609static int raydium_i2c_fw_write_page(struct i2c_client *client,
610 u16 page_idx, const void *data, size_t len)
611{
612 u8 buf[RM_BL_WRT_LEN];
613 size_t xfer_len;
614 int error;
615 int i;
616
617 BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0);
618
619 for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) {
620 buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT;
621 buf[BL_PAGE_STR] = page_idx ? 0xff : 0;
622 buf[BL_PKG_IDX] = i + 1;
623
624 xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE);
625 memcpy(&buf[BL_DATA_STR], data, xfer_len);
626 if (len < RM_BL_WRT_PKG_SIZE)
627 memset(&buf[BL_DATA_STR + xfer_len], 0xff,
628 RM_BL_WRT_PKG_SIZE - xfer_len);
629
630 error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN,
631 RAYDIUM_WAIT_READY);
632 if (error) {
633 dev_err(&client->dev,
634 "page write command failed for page %d, chunk %d: %d\n",
635 page_idx, i, error);
636 return error;
637 }
638
639 data += xfer_len;
640 len -= xfer_len;
641 }
642
643 return error;
644}
645
646static u16 raydium_calc_chksum(const u8 *buf, u16 len)
647{
648 u16 checksum = 0;
649 u16 i;
650
651 for (i = 0; i < len; i++)
652 checksum += buf[i];
653
654 return checksum;
655}
656
657static int raydium_i2c_do_update_firmware(struct raydium_data *ts,
658 const struct firmware *fw)
659{
660 struct i2c_client *client = ts->client;
661 const void *data;
662 size_t data_len;
663 size_t len;
664 int page_nr;
665 int i;
666 int error;
667 u16 fw_checksum;
668
669 if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) {
670 dev_err(&client->dev, "Invalid firmware length\n");
671 return -EINVAL;
672 }
673
674 error = raydium_i2c_check_fw_status(ts);
675 if (error) {
676 dev_err(&client->dev, "Unable to access IC %d\n", error);
677 return error;
678 }
679
680 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
681 for (i = 0; i < RM_MAX_RETRIES; i++) {
682 error = raydium_i2c_enter_bl(client);
683 if (!error) {
684 error = raydium_i2c_check_fw_status(ts);
685 if (error) {
686 dev_err(&client->dev,
687 "unable to access IC: %d\n",
688 error);
689 return error;
690 }
691
692 if (ts->boot_mode == RAYDIUM_TS_BLDR)
693 break;
694 }
695 }
696
697 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
698 dev_err(&client->dev,
699 "failed to jump to boot loader: %d\n",
700 error);
701 return -EIO;
702 }
703 }
704
705 error = raydium_i2c_disable_watch_dog(client);
706 if (error)
707 return error;
708
709 error = raydium_i2c_check_path(client);
710 if (error)
711 return error;
712
713 error = raydium_i2c_boot_trigger(client);
714 if (error) {
715 dev_err(&client->dev, "send boot trigger fail: %d\n", error);
716 return error;
717 }
718
719 msleep(RM_BOOT_DELAY_MS);
720
721 data = fw->data;
722 data_len = fw->size;
723 page_nr = 0;
724
725 while (data_len) {
726 len = min_t(size_t, data_len, RM_FW_PAGE_SIZE);
727
728 error = raydium_i2c_fw_write_page(client, page_nr++, data, len);
729 if (error)
730 return error;
731
732 msleep(20);
733
734 data += len;
735 data_len -= len;
736 }
737
738 error = raydium_i2c_leave_bl(client);
739 if (error) {
740 dev_err(&client->dev,
741 "failed to leave boot loader: %d\n", error);
742 return error;
743 }
744
745 dev_dbg(&client->dev, "left boot loader mode\n");
746 msleep(RM_BOOT_DELAY_MS);
747
748 error = raydium_i2c_check_fw_status(ts);
749 if (error) {
750 dev_err(&client->dev,
751 "failed to check fw status after write: %d\n",
752 error);
753 return error;
754 }
755
756 if (ts->boot_mode != RAYDIUM_TS_MAIN) {
757 dev_err(&client->dev,
758 "failed to switch to main fw after writing firmware: %d\n",
759 error);
760 return -EINVAL;
761 }
762
763 error = raydium_i2c_fw_trigger(client);
764 if (error) {
765 dev_err(&client->dev, "failed to trigger fw: %d\n", error);
766 return error;
767 }
768
769 fw_checksum = raydium_calc_chksum(fw->data, fw->size);
770
771 error = raydium_i2c_write_checksum(client, fw->size, fw_checksum);
772 if (error)
773 return error;
774
775 return 0;
776}
777
778static int raydium_i2c_fw_update(struct raydium_data *ts)
779{
780 struct i2c_client *client = ts->client;
781 const struct firmware *fw = NULL;
782 char *fw_file;
783 int error;
784
785 fw_file = kasprintf(GFP_KERNEL, "raydium_%#04x.fw",
786 le32_to_cpu(ts->info.hw_ver));
787 if (!fw_file)
788 return -ENOMEM;
789
790 dev_dbg(&client->dev, "firmware name: %s\n", fw_file);
791
792 error = request_firmware(&fw, fw_file, &client->dev);
793 if (error) {
794 dev_err(&client->dev, "Unable to open firmware %s\n", fw_file);
795 goto out_free_fw_file;
796 }
797
798 disable_irq(client->irq);
799
800 error = raydium_i2c_do_update_firmware(ts, fw);
801 if (error) {
802 dev_err(&client->dev, "firmware update failed: %d\n", error);
803 ts->boot_mode = RAYDIUM_TS_BLDR;
804 goto out_enable_irq;
805 }
806
807 error = raydium_i2c_initialize(ts);
808 if (error) {
809 dev_err(&client->dev,
810 "failed to initialize device after firmware update: %d\n",
811 error);
812 ts->boot_mode = RAYDIUM_TS_BLDR;
813 goto out_enable_irq;
814 }
815
816 ts->boot_mode = RAYDIUM_TS_MAIN;
817
818out_enable_irq:
819 enable_irq(client->irq);
820 msleep(100);
821
822 release_firmware(fw);
823
824out_free_fw_file:
825 kfree(fw_file);
826
827 return error;
828}
829
830static void raydium_mt_event(struct raydium_data *ts)
831{
832 int i;
833
834 for (i = 0; i < ts->report_size / ts->contact_size; i++) {
835 u8 *contact = &ts->report_data[ts->contact_size * i];
836 bool state = contact[RM_CONTACT_STATE_POS];
837 u8 wx, wy;
838
839 input_mt_slot(ts->input, i);
840 input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state);
841
842 if (!state)
843 continue;
844
845 input_report_abs(ts->input, ABS_MT_POSITION_X,
846 get_unaligned_le16(&contact[RM_CONTACT_X_POS]));
847 input_report_abs(ts->input, ABS_MT_POSITION_Y,
848 get_unaligned_le16(&contact[RM_CONTACT_Y_POS]));
849 input_report_abs(ts->input, ABS_MT_PRESSURE,
850 contact[RM_CONTACT_PRESSURE_POS]);
851
852 wx = contact[RM_CONTACT_WIDTH_X_POS];
853 wy = contact[RM_CONTACT_WIDTH_Y_POS];
854
855 input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy));
856 input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy));
857 }
858
859 input_mt_sync_frame(ts->input);
860 input_sync(ts->input);
861}
862
863static irqreturn_t raydium_i2c_irq(int irq, void *_dev)
864{
865 struct raydium_data *ts = _dev;
866 int error;
867 u16 fw_crc;
868 u16 calc_crc;
869
870 if (ts->boot_mode != RAYDIUM_TS_MAIN)
871 goto out;
872
873 error = raydium_i2c_read(ts->client, ts->data_bank_addr,
874 ts->report_data, ts->pkg_size);
875 if (error)
876 goto out;
877
878 fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]);
879 calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size);
880 if (unlikely(fw_crc != calc_crc)) {
881 dev_warn(&ts->client->dev,
882 "%s: invalid packet crc %#04x vs %#04x\n",
883 __func__, calc_crc, fw_crc);
884 goto out;
885 }
886
887 raydium_mt_event(ts);
888
889out:
890 return IRQ_HANDLED;
891}
892
893static ssize_t raydium_i2c_fw_ver_show(struct device *dev,
894 struct device_attribute *attr, char *buf)
895{
896 struct i2c_client *client = to_i2c_client(dev);
897 struct raydium_data *ts = i2c_get_clientdata(client);
898
899 return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);
900}
901
902static ssize_t raydium_i2c_hw_ver_show(struct device *dev,
903 struct device_attribute *attr, char *buf)
904{
905 struct i2c_client *client = to_i2c_client(dev);
906 struct raydium_data *ts = i2c_get_clientdata(client);
907
908 return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver));
909}
910
911static ssize_t raydium_i2c_boot_mode_show(struct device *dev,
912 struct device_attribute *attr,
913 char *buf)
914{
915 struct i2c_client *client = to_i2c_client(dev);
916 struct raydium_data *ts = i2c_get_clientdata(client);
917
918 return sprintf(buf, "%s\n",
919 ts->boot_mode == RAYDIUM_TS_MAIN ?
920 "Normal" : "Recovery");
921}
922
923static ssize_t raydium_i2c_update_fw_store(struct device *dev,
924 struct device_attribute *attr,
925 const char *buf, size_t count)
926{
927 struct i2c_client *client = to_i2c_client(dev);
928 struct raydium_data *ts = i2c_get_clientdata(client);
929 int error;
930
931 error = mutex_lock_interruptible(&ts->sysfs_mutex);
932 if (error)
933 return error;
934
935 error = raydium_i2c_fw_update(ts);
936
937 mutex_unlock(&ts->sysfs_mutex);
938
939 return error ?: count;
940}
941
942static ssize_t raydium_i2c_calibrate_store(struct device *dev,
943 struct device_attribute *attr,
944 const char *buf, size_t count)
945{
946 struct i2c_client *client = to_i2c_client(dev);
947 struct raydium_data *ts = i2c_get_clientdata(client);
948 static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E };
949 int error;
950
951 error = mutex_lock_interruptible(&ts->sysfs_mutex);
952 if (error)
953 return error;
954
955 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
956 RAYDIUM_WAIT_READY);
957 if (error)
958 dev_err(&client->dev, "calibrate command failed: %d\n", error);
959
960 mutex_unlock(&ts->sysfs_mutex);
961 return error ?: count;
962}
963
964static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL);
965static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL);
966static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL);
967static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store);
968static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store);
969
970static struct attribute *raydium_i2c_attributes[] = {
971 &dev_attr_update_fw.attr,
972 &dev_attr_boot_mode.attr,
973 &dev_attr_fw_version.attr,
974 &dev_attr_hw_version.attr,
975 &dev_attr_calibrate.attr,
976 NULL
977};
978
979static const struct attribute_group raydium_i2c_attribute_group = {
980 .attrs = raydium_i2c_attributes,
981};
982
983static int raydium_i2c_power_on(struct raydium_data *ts)
984{
985 int error;
986
987 if (!ts->reset_gpio)
988 return 0;
989
990 gpiod_set_value_cansleep(ts->reset_gpio, 1);
991
992 error = regulator_enable(ts->avdd);
993 if (error) {
994 dev_err(&ts->client->dev,
995 "failed to enable avdd regulator: %d\n", error);
996 goto release_reset_gpio;
997 }
998
999 error = regulator_enable(ts->vccio);
1000 if (error) {
1001 regulator_disable(ts->avdd);
1002 dev_err(&ts->client->dev,
1003 "failed to enable vccio regulator: %d\n", error);
1004 goto release_reset_gpio;
1005 }
1006
1007 udelay(RM_POWERON_DELAY_USEC);
1008
1009release_reset_gpio:
1010 gpiod_set_value_cansleep(ts->reset_gpio, 0);
1011
1012 if (error)
1013 return error;
1014
1015 msleep(RM_RESET_DELAY_MSEC);
1016
1017 return 0;
1018}
1019
1020static void raydium_i2c_power_off(void *_data)
1021{
1022 struct raydium_data *ts = _data;
1023
1024 if (ts->reset_gpio) {
1025 gpiod_set_value_cansleep(ts->reset_gpio, 1);
1026 regulator_disable(ts->vccio);
1027 regulator_disable(ts->avdd);
1028 }
1029}
1030
1031static int raydium_i2c_probe(struct i2c_client *client,
1032 const struct i2c_device_id *id)
1033{
1034 union i2c_smbus_data dummy;
1035 struct raydium_data *ts;
1036 int error;
1037
1038 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1039 dev_err(&client->dev,
1040 "i2c check functionality error (need I2C_FUNC_I2C)\n");
1041 return -ENXIO;
1042 }
1043
1044 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
1045 if (!ts)
1046 return -ENOMEM;
1047
1048 mutex_init(&ts->sysfs_mutex);
1049
1050 ts->client = client;
1051 i2c_set_clientdata(client, ts);
1052
1053 ts->avdd = devm_regulator_get(&client->dev, "avdd");
1054 if (IS_ERR(ts->avdd)) {
1055 error = PTR_ERR(ts->avdd);
1056 if (error != -EPROBE_DEFER)
1057 dev_err(&client->dev,
1058 "Failed to get 'avdd' regulator: %d\n", error);
1059 return error;
1060 }
1061
1062 ts->vccio = devm_regulator_get(&client->dev, "vccio");
1063 if (IS_ERR(ts->vccio)) {
1064 error = PTR_ERR(ts->vccio);
1065 if (error != -EPROBE_DEFER)
1066 dev_err(&client->dev,
1067 "Failed to get 'vccio' regulator: %d\n", error);
1068 return error;
1069 }
1070
1071 ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
1072 GPIOD_OUT_LOW);
1073 if (IS_ERR(ts->reset_gpio)) {
1074 error = PTR_ERR(ts->reset_gpio);
1075 if (error != -EPROBE_DEFER)
1076 dev_err(&client->dev,
1077 "failed to get reset gpio: %d\n", error);
1078 return error;
1079 }
1080
1081 error = raydium_i2c_power_on(ts);
1082 if (error)
1083 return error;
1084
1085 error = devm_add_action(&client->dev, raydium_i2c_power_off, ts);
1086 if (error) {
1087 dev_err(&client->dev,
1088 "failed to install power off action: %d\n", error);
1089 raydium_i2c_power_off(ts);
1090 return error;
1091 }
1092
1093
1094 if (i2c_smbus_xfer(client->adapter, client->addr, 0,
1095 I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
1096 dev_err(&client->dev, "nothing at this address\n");
1097 return -ENXIO;
1098 }
1099
1100 error = raydium_i2c_initialize(ts);
1101 if (error) {
1102 dev_err(&client->dev, "failed to initialize: %d\n", error);
1103 return error;
1104 }
1105
1106 ts->report_data = devm_kmalloc(&client->dev,
1107 ts->pkg_size, GFP_KERNEL);
1108 if (!ts->report_data)
1109 return -ENOMEM;
1110
1111 ts->input = devm_input_allocate_device(&client->dev);
1112 if (!ts->input) {
1113 dev_err(&client->dev, "Failed to allocate input device\n");
1114 return -ENOMEM;
1115 }
1116
1117 ts->input->name = "Raydium Touchscreen";
1118 ts->input->id.bustype = BUS_I2C;
1119
1120 input_set_abs_params(ts->input, ABS_MT_POSITION_X,
1121 0, le16_to_cpu(ts->info.x_max), 0, 0);
1122 input_set_abs_params(ts->input, ABS_MT_POSITION_Y,
1123 0, le16_to_cpu(ts->info.y_max), 0, 0);
1124 input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);
1125 input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);
1126
1127 input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
1128 input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
1129
1130 error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM,
1131 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
1132 if (error) {
1133 dev_err(&client->dev,
1134 "failed to initialize MT slots: %d\n", error);
1135 return error;
1136 }
1137
1138 error = input_register_device(ts->input);
1139 if (error) {
1140 dev_err(&client->dev,
1141 "unable to register input device: %d\n", error);
1142 return error;
1143 }
1144
1145 error = devm_request_threaded_irq(&client->dev, client->irq,
1146 NULL, raydium_i2c_irq,
1147 IRQF_ONESHOT, client->name, ts);
1148 if (error) {
1149 dev_err(&client->dev, "Failed to register interrupt\n");
1150 return error;
1151 }
1152
1153 error = devm_device_add_group(&client->dev,
1154 &raydium_i2c_attribute_group);
1155 if (error) {
1156 dev_err(&client->dev, "failed to create sysfs attributes: %d\n",
1157 error);
1158 return error;
1159 }
1160
1161 return 0;
1162}
1163
1164static void __maybe_unused raydium_enter_sleep(struct i2c_client *client)
1165{
1166 static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f };
1167 int error;
1168
1169 error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP,
1170 sleep_cmd, sizeof(sleep_cmd));
1171 if (error)
1172 dev_err(&client->dev,
1173 "sleep command failed: %d\n", error);
1174}
1175
1176static int __maybe_unused raydium_i2c_suspend(struct device *dev)
1177{
1178 struct i2c_client *client = to_i2c_client(dev);
1179 struct raydium_data *ts = i2c_get_clientdata(client);
1180
1181
1182 if (ts->boot_mode != RAYDIUM_TS_MAIN)
1183 return -EBUSY;
1184
1185 disable_irq(client->irq);
1186
1187 if (device_may_wakeup(dev)) {
1188 raydium_enter_sleep(client);
1189
1190 ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0);
1191 } else {
1192 raydium_i2c_power_off(ts);
1193 }
1194
1195 return 0;
1196}
1197
1198static int __maybe_unused raydium_i2c_resume(struct device *dev)
1199{
1200 struct i2c_client *client = to_i2c_client(dev);
1201 struct raydium_data *ts = i2c_get_clientdata(client);
1202
1203 if (device_may_wakeup(dev)) {
1204 if (ts->wake_irq_enabled)
1205 disable_irq_wake(client->irq);
1206 raydium_i2c_sw_reset(client);
1207 } else {
1208 raydium_i2c_power_on(ts);
1209 raydium_i2c_initialize(ts);
1210 }
1211
1212 enable_irq(client->irq);
1213
1214 return 0;
1215}
1216
1217static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
1218 raydium_i2c_suspend, raydium_i2c_resume);
1219
1220static const struct i2c_device_id raydium_i2c_id[] = {
1221 { "raydium_i2c" , 0 },
1222 { "rm32380", 0 },
1223 { }
1224};
1225MODULE_DEVICE_TABLE(i2c, raydium_i2c_id);
1226
1227#ifdef CONFIG_ACPI
1228static const struct acpi_device_id raydium_acpi_id[] = {
1229 { "RAYD0001", 0 },
1230 { }
1231};
1232MODULE_DEVICE_TABLE(acpi, raydium_acpi_id);
1233#endif
1234
1235#ifdef CONFIG_OF
1236static const struct of_device_id raydium_of_match[] = {
1237 { .compatible = "raydium,rm32380", },
1238 { }
1239};
1240MODULE_DEVICE_TABLE(of, raydium_of_match);
1241#endif
1242
1243static struct i2c_driver raydium_i2c_driver = {
1244 .probe = raydium_i2c_probe,
1245 .id_table = raydium_i2c_id,
1246 .driver = {
1247 .name = "raydium_ts",
1248 .pm = &raydium_i2c_pm_ops,
1249 .acpi_match_table = ACPI_PTR(raydium_acpi_id),
1250 .of_match_table = of_match_ptr(raydium_of_match),
1251 },
1252};
1253module_i2c_driver(raydium_i2c_driver);
1254
1255MODULE_AUTHOR("Raydium");
1256MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");
1257MODULE_LICENSE("GPL v2");
1258
