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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#define RM_BOOT_CMD_READHWID 0x0E
41
42
43#define RM_CMD_QUERY_BANK 0x2B
44#define RM_CMD_DATA_BANK 0x4D
45#define RM_CMD_ENTER_SLEEP 0x4E
46#define RM_CMD_BANK_SWITCH 0xAA
47
48#define RM_RESET_MSG_ADDR 0x40000004
49
50#define RM_MAX_READ_SIZE 56
51#define RM_PACKET_CRC_SIZE 2
52
53
54#define RM_MAX_RETRIES 3
55#define RM_RETRY_DELAY_MS 20
56#define RM_MAX_TOUCH_NUM 10
57#define RM_BOOT_DELAY_MS 100
58
59
60#define RM_CONTACT_STATE_POS 0
61#define RM_CONTACT_X_POS 1
62#define RM_CONTACT_Y_POS 3
63#define RM_CONTACT_PRESSURE_POS 5
64#define RM_CONTACT_WIDTH_X_POS 6
65#define RM_CONTACT_WIDTH_Y_POS 7
66
67
68#define RM_BL_WRT_CMD_SIZE 3
69#define RM_BL_WRT_PKG_SIZE 32
70#define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE)
71#define RM_FW_PAGE_SIZE 128
72#define RM_MAX_FW_RETRIES 30
73#define RM_MAX_FW_SIZE 0xD000
74
75#define RM_POWERON_DELAY_USEC 500
76#define RM_RESET_DELAY_MSEC 50
77
78enum raydium_bl_cmd {
79 BL_HEADER = 0,
80 BL_PAGE_STR,
81 BL_PKG_IDX,
82 BL_DATA_STR,
83};
84
85enum raydium_bl_ack {
86 RAYDIUM_ACK_NULL = 0,
87 RAYDIUM_WAIT_READY,
88 RAYDIUM_PATH_READY,
89};
90
91enum raydium_boot_mode {
92 RAYDIUM_TS_MAIN = 0,
93 RAYDIUM_TS_BLDR,
94};
95
96
97struct raydium_data_info {
98 __le32 data_bank_addr;
99 u8 pkg_size;
100 u8 tp_info_size;
101};
102
103struct raydium_info {
104 __le32 hw_ver;
105 u8 main_ver;
106 u8 sub_ver;
107 __le16 ft_ver;
108 u8 x_num;
109 u8 y_num;
110 __le16 x_max;
111 __le16 y_max;
112 u8 x_res;
113 u8 y_res;
114};
115
116
117struct raydium_data {
118 struct i2c_client *client;
119 struct input_dev *input;
120
121 struct regulator *avdd;
122 struct regulator *vccio;
123 struct gpio_desc *reset_gpio;
124
125 struct raydium_info info;
126
127 struct mutex sysfs_mutex;
128
129 u8 *report_data;
130
131 u32 data_bank_addr;
132 u8 report_size;
133 u8 contact_size;
134 u8 pkg_size;
135
136 enum raydium_boot_mode boot_mode;
137
138 bool wake_irq_enabled;
139};
140
141
142
143
144
145struct __packed raydium_bank_switch_header {
146 u8 cmd;
147 __be32 be_addr;
148};
149
150static int raydium_i2c_xfer(struct i2c_client *client, u32 addr,
151 struct i2c_msg *xfer, size_t xfer_count)
152{
153 int ret;
154
155
156
157
158 int xfer_start_idx = (addr > 0xff) ? 0 : 1;
159 xfer_count -= xfer_start_idx;
160
161 ret = i2c_transfer(client->adapter, &xfer[xfer_start_idx], xfer_count);
162 if (likely(ret == xfer_count))
163 return 0;
164
165 return ret < 0 ? ret : -EIO;
166}
167
168static int raydium_i2c_send(struct i2c_client *client,
169 u32 addr, const void *data, size_t len)
170{
171 int tries = 0;
172 int error;
173 u8 *tx_buf;
174 u8 reg_addr = addr & 0xff;
175
176 tx_buf = kmalloc(len + 1, GFP_KERNEL);
177 if (!tx_buf)
178 return -ENOMEM;
179
180 tx_buf[0] = reg_addr;
181 memcpy(tx_buf + 1, data, len);
182
183 do {
184 struct raydium_bank_switch_header header = {
185 .cmd = RM_CMD_BANK_SWITCH,
186 .be_addr = cpu_to_be32(addr),
187 };
188
189
190
191
192
193
194
195
196
197
198
199 struct i2c_msg xfer[] = {
200 {
201 .addr = client->addr,
202 .len = sizeof(header),
203 .buf = (u8 *)&header,
204 },
205 {
206 .addr = client->addr,
207 .len = len + 1,
208 .buf = tx_buf,
209 },
210 };
211
212 error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
213 if (likely(!error))
214 return 0;
215
216 msleep(RM_RETRY_DELAY_MS);
217 } while (++tries < RM_MAX_RETRIES);
218
219 dev_err(&client->dev, "%s failed: %d\n", __func__, error);
220 return error;
221}
222
223static int raydium_i2c_read(struct i2c_client *client,
224 u32 addr, void *data, size_t len)
225{
226 int error;
227
228 while (len) {
229 u8 reg_addr = addr & 0xff;
230 struct raydium_bank_switch_header header = {
231 .cmd = RM_CMD_BANK_SWITCH,
232 .be_addr = cpu_to_be32(addr),
233 };
234 size_t xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
235
236
237
238
239
240
241
242
243
244
245
246 struct i2c_msg xfer[] = {
247 {
248 .addr = client->addr,
249 .len = sizeof(header),
250 .buf = (u8 *)&header,
251 },
252 {
253 .addr = client->addr,
254 .len = 1,
255 .buf = ®_addr,
256 },
257 {
258 .addr = client->addr,
259 .len = xfer_len,
260 .buf = data,
261 .flags = I2C_M_RD,
262 }
263 };
264
265 error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
266 if (unlikely(error))
267 return error;
268
269 len -= xfer_len;
270 data += xfer_len;
271 addr += xfer_len;
272 }
273
274 return 0;
275}
276
277static int raydium_i2c_sw_reset(struct i2c_client *client)
278{
279 const u8 soft_rst_cmd = 0x01;
280 int error;
281
282 error = raydium_i2c_send(client, RM_RESET_MSG_ADDR, &soft_rst_cmd,
283 sizeof(soft_rst_cmd));
284 if (error) {
285 dev_err(&client->dev, "software reset failed: %d\n", error);
286 return error;
287 }
288
289 msleep(RM_RESET_DELAY_MSEC);
290
291 return 0;
292}
293
294static int raydium_i2c_query_ts_bootloader_info(struct raydium_data *ts)
295{
296 struct i2c_client *client = ts->client;
297 static const u8 get_hwid[] = { RM_BOOT_CMD_READHWID,
298 0x10, 0xc0, 0x01, 0x00, 0x04, 0x00 };
299 u8 rbuf[5] = { 0 };
300 u32 hw_ver;
301 int error;
302
303 error = raydium_i2c_send(client, RM_CMD_BOOT_WRT,
304 get_hwid, sizeof(get_hwid));
305 if (error) {
306 dev_err(&client->dev, "WRT HWID command failed: %d\n", error);
307 return error;
308 }
309
310 error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, rbuf, 1);
311 if (error) {
312 dev_err(&client->dev, "Ack HWID command failed: %d\n", error);
313 return error;
314 }
315
316 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK, rbuf, sizeof(rbuf));
317 if (error) {
318 dev_err(&client->dev, "Read HWID command failed: %d (%4ph)\n",
319 error, rbuf + 1);
320 hw_ver = 0xffffffffUL;
321 } else {
322 hw_ver = get_unaligned_be32(rbuf + 1);
323 }
324
325 ts->info.hw_ver = cpu_to_le32(hw_ver);
326 ts->info.main_ver = 0xff;
327 ts->info.sub_ver = 0xff;
328
329 return error;
330}
331
332static int raydium_i2c_query_ts_info(struct raydium_data *ts)
333{
334 struct i2c_client *client = ts->client;
335 struct raydium_data_info data_info;
336 __le32 query_bank_addr;
337
338 int error, retry_cnt;
339
340 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
341 error = raydium_i2c_read(client, RM_CMD_DATA_BANK,
342 &data_info, sizeof(data_info));
343 if (error)
344 continue;
345
346
347
348
349
350
351 if (ts->report_data && ts->pkg_size != data_info.pkg_size) {
352 dev_warn(&client->dev,
353 "report size changes, was: %d, new: %d\n",
354 ts->pkg_size, data_info.pkg_size);
355 } else {
356 ts->pkg_size = data_info.pkg_size;
357 ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE;
358 }
359
360 ts->contact_size = data_info.tp_info_size;
361 ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr);
362
363 dev_dbg(&client->dev,
364 "data_bank_addr: %#08x, report_size: %d, contact_size: %d\n",
365 ts->data_bank_addr, ts->report_size, ts->contact_size);
366
367 error = raydium_i2c_read(client, RM_CMD_QUERY_BANK,
368 &query_bank_addr,
369 sizeof(query_bank_addr));
370 if (error)
371 continue;
372
373 error = raydium_i2c_read(client, le32_to_cpu(query_bank_addr),
374 &ts->info, sizeof(ts->info));
375 if (error)
376 continue;
377
378 return 0;
379 }
380
381 dev_err(&client->dev, "failed to query device parameters: %d\n", error);
382 return error;
383}
384
385static int raydium_i2c_check_fw_status(struct raydium_data *ts)
386{
387 struct i2c_client *client = ts->client;
388 static const u8 bl_ack = 0x62;
389 static const u8 main_ack = 0x66;
390 u8 buf[4];
391 int error;
392
393 error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf));
394 if (!error) {
395 if (buf[0] == bl_ack)
396 ts->boot_mode = RAYDIUM_TS_BLDR;
397 else if (buf[0] == main_ack)
398 ts->boot_mode = RAYDIUM_TS_MAIN;
399 return 0;
400 }
401
402 return error;
403}
404
405static int raydium_i2c_initialize(struct raydium_data *ts)
406{
407 struct i2c_client *client = ts->client;
408 int error, retry_cnt;
409
410 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
411
412 msleep(RM_BOOT_DELAY_MS);
413
414 error = raydium_i2c_check_fw_status(ts);
415 if (error) {
416 dev_err(&client->dev,
417 "failed to read 'hello' packet: %d\n", error);
418 continue;
419 }
420
421 if (ts->boot_mode == RAYDIUM_TS_BLDR ||
422 ts->boot_mode == RAYDIUM_TS_MAIN) {
423 break;
424 }
425 }
426
427 if (error)
428 ts->boot_mode = RAYDIUM_TS_BLDR;
429
430 if (ts->boot_mode == RAYDIUM_TS_BLDR)
431 raydium_i2c_query_ts_bootloader_info(ts);
432 else
433 raydium_i2c_query_ts_info(ts);
434
435 return error;
436}
437
438static int raydium_i2c_bl_chk_state(struct i2c_client *client,
439 enum raydium_bl_ack state)
440{
441 static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 };
442 u8 rbuf[sizeof(ack_ok)];
443 u8 retry;
444 int error;
445
446 for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) {
447 switch (state) {
448 case RAYDIUM_ACK_NULL:
449 return 0;
450
451 case RAYDIUM_WAIT_READY:
452 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
453 &rbuf[0], 1);
454 if (!error && rbuf[0] == RM_BOOT_RDY)
455 return 0;
456
457 break;
458
459 case RAYDIUM_PATH_READY:
460 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
461 rbuf, sizeof(rbuf));
462 if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok)))
463 return 0;
464
465 break;
466
467 default:
468 dev_err(&client->dev, "%s: invalid target state %d\n",
469 __func__, state);
470 return -EINVAL;
471 }
472
473 msleep(20);
474 }
475
476 return -ETIMEDOUT;
477}
478
479static int raydium_i2c_write_object(struct i2c_client *client,
480 const void *data, size_t len,
481 enum raydium_bl_ack state)
482{
483 int error;
484 static const u8 cmd[] = { 0xFF, 0x39 };
485
486 error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
487 if (error) {
488 dev_err(&client->dev, "WRT obj command failed: %d\n",
489 error);
490 return error;
491 }
492
493 error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, cmd, sizeof(cmd));
494 if (error) {
495 dev_err(&client->dev, "Ack obj command failed: %d\n", error);
496 return error;
497 }
498
499 error = raydium_i2c_bl_chk_state(client, state);
500 if (error) {
501 dev_err(&client->dev, "BL check state failed: %d\n", error);
502 return error;
503 }
504 return 0;
505}
506
507static int raydium_i2c_boot_trigger(struct i2c_client *client)
508{
509 static const u8 cmd[7][6] = {
510 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 },
511 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
512 { 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 },
513 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
514 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 },
515 { 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 },
516 { 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 },
517 };
518 int i;
519 int error;
520
521 for (i = 0; i < 7; i++) {
522 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
523 RAYDIUM_WAIT_READY);
524 if (error) {
525 dev_err(&client->dev,
526 "boot trigger failed at step %d: %d\n",
527 i, error);
528 return error;
529 }
530 }
531
532 return 0;
533}
534
535static int raydium_i2c_fw_trigger(struct i2c_client *client)
536{
537 static const u8 cmd[5][11] = {
538 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 },
539 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
540 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
541 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
542 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
543 };
544 int i;
545 int error;
546
547 for (i = 0; i < 5; i++) {
548 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
549 RAYDIUM_ACK_NULL);
550 if (error) {
551 dev_err(&client->dev,
552 "fw trigger failed at step %d: %d\n",
553 i, error);
554 return error;
555 }
556 }
557
558 return 0;
559}
560
561static int raydium_i2c_check_path(struct i2c_client *client)
562{
563 static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 };
564 int error;
565
566 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
567 RAYDIUM_PATH_READY);
568 if (error) {
569 dev_err(&client->dev, "check path command failed: %d\n", error);
570 return error;
571 }
572
573 return 0;
574}
575
576static int raydium_i2c_enter_bl(struct i2c_client *client)
577{
578 static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 };
579 int error;
580
581 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
582 RAYDIUM_ACK_NULL);
583 if (error) {
584 dev_err(&client->dev, "enter bl command failed: %d\n", error);
585 return error;
586 }
587
588 msleep(RM_BOOT_DELAY_MS);
589 return 0;
590}
591
592static int raydium_i2c_leave_bl(struct i2c_client *client)
593{
594 static const u8 leave_cmd[] = { 0x05, 0x00 };
595 int error;
596
597 error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd),
598 RAYDIUM_ACK_NULL);
599 if (error) {
600 dev_err(&client->dev, "leave bl command failed: %d\n", error);
601 return error;
602 }
603
604 msleep(RM_BOOT_DELAY_MS);
605 return 0;
606}
607
608static int raydium_i2c_write_checksum(struct i2c_client *client,
609 size_t length, u16 checksum)
610{
611 u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 };
612 int error;
613
614 put_unaligned_le16(length, &checksum_cmd[3]);
615 put_unaligned_le16(checksum, &checksum_cmd[5]);
616
617 error = raydium_i2c_write_object(client,
618 checksum_cmd, sizeof(checksum_cmd),
619 RAYDIUM_ACK_NULL);
620 if (error) {
621 dev_err(&client->dev, "failed to write checksum: %d\n",
622 error);
623 return error;
624 }
625
626 return 0;
627}
628
629static int raydium_i2c_disable_watch_dog(struct i2c_client *client)
630{
631 static const u8 cmd[] = { 0x0A, 0xAA };
632 int error;
633
634 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
635 RAYDIUM_WAIT_READY);
636 if (error) {
637 dev_err(&client->dev, "disable watchdog command failed: %d\n",
638 error);
639 return error;
640 }
641
642 return 0;
643}
644
645static int raydium_i2c_fw_write_page(struct i2c_client *client,
646 u16 page_idx, const void *data, size_t len)
647{
648 u8 buf[RM_BL_WRT_LEN];
649 size_t xfer_len;
650 int error;
651 int i;
652
653 BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0);
654
655 for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) {
656 buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT;
657 buf[BL_PAGE_STR] = page_idx ? 0xff : 0;
658 buf[BL_PKG_IDX] = i + 1;
659
660 xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE);
661 memcpy(&buf[BL_DATA_STR], data, xfer_len);
662 if (len < RM_BL_WRT_PKG_SIZE)
663 memset(&buf[BL_DATA_STR + xfer_len], 0xff,
664 RM_BL_WRT_PKG_SIZE - xfer_len);
665
666 error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN,
667 RAYDIUM_WAIT_READY);
668 if (error) {
669 dev_err(&client->dev,
670 "page write command failed for page %d, chunk %d: %d\n",
671 page_idx, i, error);
672 return error;
673 }
674
675 data += xfer_len;
676 len -= xfer_len;
677 }
678
679 return error;
680}
681
682static u16 raydium_calc_chksum(const u8 *buf, u16 len)
683{
684 u16 checksum = 0;
685 u16 i;
686
687 for (i = 0; i < len; i++)
688 checksum += buf[i];
689
690 return checksum;
691}
692
693static int raydium_i2c_do_update_firmware(struct raydium_data *ts,
694 const struct firmware *fw)
695{
696 struct i2c_client *client = ts->client;
697 const void *data;
698 size_t data_len;
699 size_t len;
700 int page_nr;
701 int i;
702 int error;
703 u16 fw_checksum;
704
705 if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) {
706 dev_err(&client->dev, "Invalid firmware length\n");
707 return -EINVAL;
708 }
709
710 error = raydium_i2c_check_fw_status(ts);
711 if (error) {
712 dev_err(&client->dev, "Unable to access IC %d\n", error);
713 return error;
714 }
715
716 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
717 for (i = 0; i < RM_MAX_RETRIES; i++) {
718 error = raydium_i2c_enter_bl(client);
719 if (!error) {
720 error = raydium_i2c_check_fw_status(ts);
721 if (error) {
722 dev_err(&client->dev,
723 "unable to access IC: %d\n",
724 error);
725 return error;
726 }
727
728 if (ts->boot_mode == RAYDIUM_TS_BLDR)
729 break;
730 }
731 }
732
733 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
734 dev_err(&client->dev,
735 "failed to jump to boot loader: %d\n",
736 error);
737 return -EIO;
738 }
739 }
740
741 error = raydium_i2c_disable_watch_dog(client);
742 if (error)
743 return error;
744
745 error = raydium_i2c_check_path(client);
746 if (error)
747 return error;
748
749 error = raydium_i2c_boot_trigger(client);
750 if (error) {
751 dev_err(&client->dev, "send boot trigger fail: %d\n", error);
752 return error;
753 }
754
755 msleep(RM_BOOT_DELAY_MS);
756
757 data = fw->data;
758 data_len = fw->size;
759 page_nr = 0;
760
761 while (data_len) {
762 len = min_t(size_t, data_len, RM_FW_PAGE_SIZE);
763
764 error = raydium_i2c_fw_write_page(client, page_nr++, data, len);
765 if (error)
766 return error;
767
768 msleep(20);
769
770 data += len;
771 data_len -= len;
772 }
773
774 error = raydium_i2c_leave_bl(client);
775 if (error) {
776 dev_err(&client->dev,
777 "failed to leave boot loader: %d\n", error);
778 return error;
779 }
780
781 dev_dbg(&client->dev, "left boot loader mode\n");
782 msleep(RM_BOOT_DELAY_MS);
783
784 error = raydium_i2c_check_fw_status(ts);
785 if (error) {
786 dev_err(&client->dev,
787 "failed to check fw status after write: %d\n",
788 error);
789 return error;
790 }
791
792 if (ts->boot_mode != RAYDIUM_TS_MAIN) {
793 dev_err(&client->dev,
794 "failed to switch to main fw after writing firmware: %d\n",
795 error);
796 return -EINVAL;
797 }
798
799 error = raydium_i2c_fw_trigger(client);
800 if (error) {
801 dev_err(&client->dev, "failed to trigger fw: %d\n", error);
802 return error;
803 }
804
805 fw_checksum = raydium_calc_chksum(fw->data, fw->size);
806
807 error = raydium_i2c_write_checksum(client, fw->size, fw_checksum);
808 if (error)
809 return error;
810
811 return 0;
812}
813
814static int raydium_i2c_fw_update(struct raydium_data *ts)
815{
816 struct i2c_client *client = ts->client;
817 const struct firmware *fw = NULL;
818 char *fw_file;
819 int error;
820
821 fw_file = kasprintf(GFP_KERNEL, "raydium_%#04x.fw",
822 le32_to_cpu(ts->info.hw_ver));
823 if (!fw_file)
824 return -ENOMEM;
825
826 dev_dbg(&client->dev, "firmware name: %s\n", fw_file);
827
828 error = request_firmware(&fw, fw_file, &client->dev);
829 if (error) {
830 dev_err(&client->dev, "Unable to open firmware %s\n", fw_file);
831 goto out_free_fw_file;
832 }
833
834 disable_irq(client->irq);
835
836 error = raydium_i2c_do_update_firmware(ts, fw);
837 if (error) {
838 dev_err(&client->dev, "firmware update failed: %d\n", error);
839 ts->boot_mode = RAYDIUM_TS_BLDR;
840 goto out_enable_irq;
841 }
842
843 error = raydium_i2c_initialize(ts);
844 if (error) {
845 dev_err(&client->dev,
846 "failed to initialize device after firmware update: %d\n",
847 error);
848 ts->boot_mode = RAYDIUM_TS_BLDR;
849 goto out_enable_irq;
850 }
851
852 ts->boot_mode = RAYDIUM_TS_MAIN;
853
854out_enable_irq:
855 enable_irq(client->irq);
856 msleep(100);
857
858 release_firmware(fw);
859
860out_free_fw_file:
861 kfree(fw_file);
862
863 return error;
864}
865
866static void raydium_mt_event(struct raydium_data *ts)
867{
868 int i;
869
870 for (i = 0; i < ts->report_size / ts->contact_size; i++) {
871 u8 *contact = &ts->report_data[ts->contact_size * i];
872 bool state = contact[RM_CONTACT_STATE_POS];
873 u8 wx, wy;
874
875 input_mt_slot(ts->input, i);
876 input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state);
877
878 if (!state)
879 continue;
880
881 input_report_abs(ts->input, ABS_MT_POSITION_X,
882 get_unaligned_le16(&contact[RM_CONTACT_X_POS]));
883 input_report_abs(ts->input, ABS_MT_POSITION_Y,
884 get_unaligned_le16(&contact[RM_CONTACT_Y_POS]));
885 input_report_abs(ts->input, ABS_MT_PRESSURE,
886 contact[RM_CONTACT_PRESSURE_POS]);
887
888 wx = contact[RM_CONTACT_WIDTH_X_POS];
889 wy = contact[RM_CONTACT_WIDTH_Y_POS];
890
891 input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy));
892 input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy));
893 }
894
895 input_mt_sync_frame(ts->input);
896 input_sync(ts->input);
897}
898
899static irqreturn_t raydium_i2c_irq(int irq, void *_dev)
900{
901 struct raydium_data *ts = _dev;
902 int error;
903 u16 fw_crc;
904 u16 calc_crc;
905
906 if (ts->boot_mode != RAYDIUM_TS_MAIN)
907 goto out;
908
909 error = raydium_i2c_read(ts->client, ts->data_bank_addr,
910 ts->report_data, ts->pkg_size);
911 if (error)
912 goto out;
913
914 fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]);
915 calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size);
916 if (unlikely(fw_crc != calc_crc)) {
917 dev_warn(&ts->client->dev,
918 "%s: invalid packet crc %#04x vs %#04x\n",
919 __func__, calc_crc, fw_crc);
920 goto out;
921 }
922
923 raydium_mt_event(ts);
924
925out:
926 return IRQ_HANDLED;
927}
928
929static ssize_t raydium_i2c_fw_ver_show(struct device *dev,
930 struct device_attribute *attr, char *buf)
931{
932 struct i2c_client *client = to_i2c_client(dev);
933 struct raydium_data *ts = i2c_get_clientdata(client);
934
935 return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);
936}
937
938static ssize_t raydium_i2c_hw_ver_show(struct device *dev,
939 struct device_attribute *attr, char *buf)
940{
941 struct i2c_client *client = to_i2c_client(dev);
942 struct raydium_data *ts = i2c_get_clientdata(client);
943
944 return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver));
945}
946
947static ssize_t raydium_i2c_boot_mode_show(struct device *dev,
948 struct device_attribute *attr,
949 char *buf)
950{
951 struct i2c_client *client = to_i2c_client(dev);
952 struct raydium_data *ts = i2c_get_clientdata(client);
953
954 return sprintf(buf, "%s\n",
955 ts->boot_mode == RAYDIUM_TS_MAIN ?
956 "Normal" : "Recovery");
957}
958
959static ssize_t raydium_i2c_update_fw_store(struct device *dev,
960 struct device_attribute *attr,
961 const char *buf, size_t count)
962{
963 struct i2c_client *client = to_i2c_client(dev);
964 struct raydium_data *ts = i2c_get_clientdata(client);
965 int error;
966
967 error = mutex_lock_interruptible(&ts->sysfs_mutex);
968 if (error)
969 return error;
970
971 error = raydium_i2c_fw_update(ts);
972
973 mutex_unlock(&ts->sysfs_mutex);
974
975 return error ?: count;
976}
977
978static ssize_t raydium_i2c_calibrate_store(struct device *dev,
979 struct device_attribute *attr,
980 const char *buf, size_t count)
981{
982 struct i2c_client *client = to_i2c_client(dev);
983 struct raydium_data *ts = i2c_get_clientdata(client);
984 static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E };
985 int error;
986
987 error = mutex_lock_interruptible(&ts->sysfs_mutex);
988 if (error)
989 return error;
990
991 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
992 RAYDIUM_WAIT_READY);
993 if (error)
994 dev_err(&client->dev, "calibrate command failed: %d\n", error);
995
996 mutex_unlock(&ts->sysfs_mutex);
997 return error ?: count;
998}
999
1000static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL);
1001static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL);
1002static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL);
1003static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store);
1004static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store);
1005
1006static struct attribute *raydium_i2c_attributes[] = {
1007 &dev_attr_update_fw.attr,
1008 &dev_attr_boot_mode.attr,
1009 &dev_attr_fw_version.attr,
1010 &dev_attr_hw_version.attr,
1011 &dev_attr_calibrate.attr,
1012 NULL
1013};
1014
1015static const struct attribute_group raydium_i2c_attribute_group = {
1016 .attrs = raydium_i2c_attributes,
1017};
1018
1019static int raydium_i2c_power_on(struct raydium_data *ts)
1020{
1021 int error;
1022
1023 if (!ts->reset_gpio)
1024 return 0;
1025
1026 gpiod_set_value_cansleep(ts->reset_gpio, 1);
1027
1028 error = regulator_enable(ts->avdd);
1029 if (error) {
1030 dev_err(&ts->client->dev,
1031 "failed to enable avdd regulator: %d\n", error);
1032 goto release_reset_gpio;
1033 }
1034
1035 error = regulator_enable(ts->vccio);
1036 if (error) {
1037 regulator_disable(ts->avdd);
1038 dev_err(&ts->client->dev,
1039 "failed to enable vccio regulator: %d\n", error);
1040 goto release_reset_gpio;
1041 }
1042
1043 udelay(RM_POWERON_DELAY_USEC);
1044
1045release_reset_gpio:
1046 gpiod_set_value_cansleep(ts->reset_gpio, 0);
1047
1048 if (error)
1049 return error;
1050
1051 msleep(RM_RESET_DELAY_MSEC);
1052
1053 return 0;
1054}
1055
1056static void raydium_i2c_power_off(void *_data)
1057{
1058 struct raydium_data *ts = _data;
1059
1060 if (ts->reset_gpio) {
1061 gpiod_set_value_cansleep(ts->reset_gpio, 1);
1062 regulator_disable(ts->vccio);
1063 regulator_disable(ts->avdd);
1064 }
1065}
1066
1067static int raydium_i2c_probe(struct i2c_client *client,
1068 const struct i2c_device_id *id)
1069{
1070 union i2c_smbus_data dummy;
1071 struct raydium_data *ts;
1072 int error;
1073
1074 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1075 dev_err(&client->dev,
1076 "i2c check functionality error (need I2C_FUNC_I2C)\n");
1077 return -ENXIO;
1078 }
1079
1080 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
1081 if (!ts)
1082 return -ENOMEM;
1083
1084 mutex_init(&ts->sysfs_mutex);
1085
1086 ts->client = client;
1087 i2c_set_clientdata(client, ts);
1088
1089 ts->avdd = devm_regulator_get(&client->dev, "avdd");
1090 if (IS_ERR(ts->avdd)) {
1091 error = PTR_ERR(ts->avdd);
1092 if (error != -EPROBE_DEFER)
1093 dev_err(&client->dev,
1094 "Failed to get 'avdd' regulator: %d\n", error);
1095 return error;
1096 }
1097
1098 ts->vccio = devm_regulator_get(&client->dev, "vccio");
1099 if (IS_ERR(ts->vccio)) {
1100 error = PTR_ERR(ts->vccio);
1101 if (error != -EPROBE_DEFER)
1102 dev_err(&client->dev,
1103 "Failed to get 'vccio' regulator: %d\n", error);
1104 return error;
1105 }
1106
1107 ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
1108 GPIOD_OUT_LOW);
1109 if (IS_ERR(ts->reset_gpio)) {
1110 error = PTR_ERR(ts->reset_gpio);
1111 if (error != -EPROBE_DEFER)
1112 dev_err(&client->dev,
1113 "failed to get reset gpio: %d\n", error);
1114 return error;
1115 }
1116
1117 error = raydium_i2c_power_on(ts);
1118 if (error)
1119 return error;
1120
1121 error = devm_add_action_or_reset(&client->dev,
1122 raydium_i2c_power_off, ts);
1123 if (error) {
1124 dev_err(&client->dev,
1125 "failed to install power off action: %d\n", error);
1126 return error;
1127 }
1128
1129
1130 if (i2c_smbus_xfer(client->adapter, client->addr, 0,
1131 I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
1132 dev_err(&client->dev, "nothing at this address\n");
1133 return -ENXIO;
1134 }
1135
1136 error = raydium_i2c_initialize(ts);
1137 if (error) {
1138 dev_err(&client->dev, "failed to initialize: %d\n", error);
1139 return error;
1140 }
1141
1142 ts->report_data = devm_kmalloc(&client->dev,
1143 ts->pkg_size, GFP_KERNEL);
1144 if (!ts->report_data)
1145 return -ENOMEM;
1146
1147 ts->input = devm_input_allocate_device(&client->dev);
1148 if (!ts->input) {
1149 dev_err(&client->dev, "Failed to allocate input device\n");
1150 return -ENOMEM;
1151 }
1152
1153 ts->input->name = "Raydium Touchscreen";
1154 ts->input->id.bustype = BUS_I2C;
1155
1156 input_set_abs_params(ts->input, ABS_MT_POSITION_X,
1157 0, le16_to_cpu(ts->info.x_max), 0, 0);
1158 input_set_abs_params(ts->input, ABS_MT_POSITION_Y,
1159 0, le16_to_cpu(ts->info.y_max), 0, 0);
1160 input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);
1161 input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);
1162
1163 input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
1164 input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
1165
1166 error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM,
1167 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
1168 if (error) {
1169 dev_err(&client->dev,
1170 "failed to initialize MT slots: %d\n", error);
1171 return error;
1172 }
1173
1174 error = input_register_device(ts->input);
1175 if (error) {
1176 dev_err(&client->dev,
1177 "unable to register input device: %d\n", error);
1178 return error;
1179 }
1180
1181 error = devm_request_threaded_irq(&client->dev, client->irq,
1182 NULL, raydium_i2c_irq,
1183 IRQF_ONESHOT, client->name, ts);
1184 if (error) {
1185 dev_err(&client->dev, "Failed to register interrupt\n");
1186 return error;
1187 }
1188
1189 error = devm_device_add_group(&client->dev,
1190 &raydium_i2c_attribute_group);
1191 if (error) {
1192 dev_err(&client->dev, "failed to create sysfs attributes: %d\n",
1193 error);
1194 return error;
1195 }
1196
1197 return 0;
1198}
1199
1200static void __maybe_unused raydium_enter_sleep(struct i2c_client *client)
1201{
1202 static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f };
1203 int error;
1204
1205 error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP,
1206 sleep_cmd, sizeof(sleep_cmd));
1207 if (error)
1208 dev_err(&client->dev,
1209 "sleep command failed: %d\n", error);
1210}
1211
1212static int __maybe_unused raydium_i2c_suspend(struct device *dev)
1213{
1214 struct i2c_client *client = to_i2c_client(dev);
1215 struct raydium_data *ts = i2c_get_clientdata(client);
1216
1217
1218 if (ts->boot_mode != RAYDIUM_TS_MAIN)
1219 return -EBUSY;
1220
1221 disable_irq(client->irq);
1222
1223 if (device_may_wakeup(dev)) {
1224 raydium_enter_sleep(client);
1225
1226 ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0);
1227 } else {
1228 raydium_i2c_power_off(ts);
1229 }
1230
1231 return 0;
1232}
1233
1234static int __maybe_unused raydium_i2c_resume(struct device *dev)
1235{
1236 struct i2c_client *client = to_i2c_client(dev);
1237 struct raydium_data *ts = i2c_get_clientdata(client);
1238
1239 if (device_may_wakeup(dev)) {
1240 if (ts->wake_irq_enabled)
1241 disable_irq_wake(client->irq);
1242 raydium_i2c_sw_reset(client);
1243 } else {
1244 raydium_i2c_power_on(ts);
1245 raydium_i2c_initialize(ts);
1246 }
1247
1248 enable_irq(client->irq);
1249
1250 return 0;
1251}
1252
1253static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
1254 raydium_i2c_suspend, raydium_i2c_resume);
1255
1256static const struct i2c_device_id raydium_i2c_id[] = {
1257 { "raydium_i2c", 0 },
1258 { "rm32380", 0 },
1259 { }
1260};
1261MODULE_DEVICE_TABLE(i2c, raydium_i2c_id);
1262
1263#ifdef CONFIG_ACPI
1264static const struct acpi_device_id raydium_acpi_id[] = {
1265 { "RAYD0001", 0 },
1266 { }
1267};
1268MODULE_DEVICE_TABLE(acpi, raydium_acpi_id);
1269#endif
1270
1271#ifdef CONFIG_OF
1272static const struct of_device_id raydium_of_match[] = {
1273 { .compatible = "raydium,rm32380", },
1274 { }
1275};
1276MODULE_DEVICE_TABLE(of, raydium_of_match);
1277#endif
1278
1279static struct i2c_driver raydium_i2c_driver = {
1280 .probe = raydium_i2c_probe,
1281 .id_table = raydium_i2c_id,
1282 .driver = {
1283 .name = "raydium_ts",
1284 .pm = &raydium_i2c_pm_ops,
1285 .acpi_match_table = ACPI_PTR(raydium_acpi_id),
1286 .of_match_table = of_match_ptr(raydium_of_match),
1287 },
1288};
1289module_i2c_driver(raydium_i2c_driver);
1290
1291MODULE_AUTHOR("Raydium");
1292MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");
1293MODULE_LICENSE("GPL v2");
1294
