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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Raydium touchscreen I2C driver.
4 *
5 * Copyright (C) 2012-2014, Raydium Semiconductor Corporation.
6 *
7 * Raydium reserves the right to make changes without further notice
8 * to the materials described herein. Raydium does not assume any
9 * liability arising out of the application described herein.
10 *
11 * Contact Raydium Semiconductor Corporation at www.rad-ic.com
12 */
13
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/pm_wakeirq.h>
25#include <linux/regulator/consumer.h>
26#include <linux/slab.h>
27#include <linux/unaligned.h>
28
29/* Slave I2C mode */
30#define RM_BOOT_BLDR 0x02
31#define RM_BOOT_MAIN 0x03
32
33/* I2C bootoloader commands */
34#define RM_CMD_BOOT_PAGE_WRT 0x0B /* send bl page write */
35#define RM_CMD_BOOT_WRT 0x11 /* send bl write */
36#define RM_CMD_BOOT_ACK 0x22 /* send ack*/
37#define RM_CMD_BOOT_CHK 0x33 /* send data check */
38#define RM_CMD_BOOT_READ 0x44 /* send wait bl data ready*/
39
40#define RM_BOOT_RDY 0xFF /* bl data ready */
41#define RM_BOOT_CMD_READHWID 0x0E /* read hwid */
42
43/* I2C main commands */
44#define RM_CMD_QUERY_BANK 0x2B
45#define RM_CMD_DATA_BANK 0x4D
46#define RM_CMD_ENTER_SLEEP 0x4E
47#define RM_CMD_BANK_SWITCH 0xAA
48
49#define RM_RESET_MSG_ADDR 0x40000004
50
51#define RM_MAX_READ_SIZE 56
52#define RM_PACKET_CRC_SIZE 2
53
54/* Touch relative info */
55#define RM_MAX_RETRIES 3
56#define RM_RETRY_DELAY_MS 20
57#define RM_MAX_TOUCH_NUM 10
58#define RM_BOOT_DELAY_MS 100
59
60/* Offsets in contact data */
61#define RM_CONTACT_STATE_POS 0
62#define RM_CONTACT_X_POS 1
63#define RM_CONTACT_Y_POS 3
64#define RM_CONTACT_PRESSURE_POS 5
65#define RM_CONTACT_WIDTH_X_POS 6
66#define RM_CONTACT_WIDTH_Y_POS 7
67
68/* Bootloader relative info */
69#define RM_BL_WRT_CMD_SIZE 3 /* bl flash wrt cmd size */
70#define RM_BL_WRT_PKG_SIZE 32 /* bl wrt pkg size */
71#define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE)
72#define RM_FW_PAGE_SIZE 128
73#define RM_MAX_FW_RETRIES 30
74#define RM_MAX_FW_SIZE 0xD000
75
76#define RM_POWERON_DELAY_USEC 500
77#define RM_RESET_DELAY_MSEC 50
78
79enum raydium_bl_cmd {
80 BL_HEADER = 0,
81 BL_PAGE_STR,
82 BL_PKG_IDX,
83 BL_DATA_STR,
84};
85
86enum raydium_bl_ack {
87 RAYDIUM_ACK_NULL = 0,
88 RAYDIUM_WAIT_READY,
89 RAYDIUM_PATH_READY,
90};
91
92enum raydium_boot_mode {
93 RAYDIUM_TS_MAIN = 0,
94 RAYDIUM_TS_BLDR,
95};
96
97/* Response to RM_CMD_DATA_BANK request */
98struct raydium_data_info {
99 __le32 data_bank_addr;
100 u8 pkg_size;
101 u8 tp_info_size;
102};
103
104struct raydium_info {
105 __le32 hw_ver; /*device version */
106 u8 main_ver;
107 u8 sub_ver;
108 __le16 ft_ver; /* test version */
109 u8 x_num;
110 u8 y_num;
111 __le16 x_max;
112 __le16 y_max;
113 u8 x_res; /* units/mm */
114 u8 y_res; /* units/mm */
115};
116
117/* struct raydium_data - represents state of Raydium touchscreen device */
118struct raydium_data {
119 struct i2c_client *client;
120 struct input_dev *input;
121
122 struct regulator *avdd;
123 struct regulator *vccio;
124 struct gpio_desc *reset_gpio;
125
126 struct raydium_info info;
127
128 struct mutex sysfs_mutex;
129
130 u8 *report_data;
131
132 u32 data_bank_addr;
133 u8 report_size;
134 u8 contact_size;
135 u8 pkg_size;
136
137 enum raydium_boot_mode boot_mode;
138};
139
140/*
141 * Header to be sent for RM_CMD_BANK_SWITCH command. This is used by
142 * raydium_i2c_{read|send} below.
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 * If address is greater than 255, then RM_CMD_BANK_SWITCH needs to be
155 * sent first. Else, skip the header i.e. xfer[0].
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 * Perform as a single i2c_transfer transaction to ensure that
190 * no other I2C transactions are initiated on the bus to any
191 * other device in between. Initiating transacations to other
192 * devices after RM_CMD_BANK_SWITCH is sent is known to cause
193 * issues. This is also why regmap infrastructure cannot be used
194 * for this driver. Regmap handles page(bank) switch and reads
195 * as separate i2c_transfer() operations. This can result in
196 * problems if the Raydium device is on a shared I2C bus.
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 goto out;
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);
219out:
220 kfree(tx_buf);
221 return error;
222}
223
224static int raydium_i2c_read(struct i2c_client *client,
225 u32 addr, void *data, size_t len)
226{
227 int error;
228
229 while (len) {
230 u8 reg_addr = addr & 0xff;
231 struct raydium_bank_switch_header header = {
232 .cmd = RM_CMD_BANK_SWITCH,
233 .be_addr = cpu_to_be32(addr),
234 };
235 size_t xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
236
237 /*
238 * Perform as a single i2c_transfer transaction to ensure that
239 * no other I2C transactions are initiated on the bus to any
240 * other device in between. Initiating transacations to other
241 * devices after RM_CMD_BANK_SWITCH is sent is known to cause
242 * issues. This is also why regmap infrastructure cannot be used
243 * for this driver. Regmap handles page(bank) switch and writes
244 * as separate i2c_transfer() operations. This can result in
245 * problems if the Raydium device is on a shared I2C bus.
246 */
247 struct i2c_msg xfer[] = {
248 {
249 .addr = client->addr,
250 .len = sizeof(header),
251 .buf = (u8 *)&header,
252 },
253 {
254 .addr = client->addr,
255 .len = 1,
256 .buf = ®_addr,
257 },
258 {
259 .addr = client->addr,
260 .len = xfer_len,
261 .buf = data,
262 .flags = I2C_M_RD,
263 }
264 };
265
266 error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
267 if (unlikely(error))
268 return error;
269
270 len -= xfer_len;
271 data += xfer_len;
272 addr += xfer_len;
273 }
274
275 return 0;
276}
277
278static int raydium_i2c_sw_reset(struct i2c_client *client)
279{
280 const u8 soft_rst_cmd = 0x01;
281 int error;
282
283 error = raydium_i2c_send(client, RM_RESET_MSG_ADDR, &soft_rst_cmd,
284 sizeof(soft_rst_cmd));
285 if (error) {
286 dev_err(&client->dev, "software reset failed: %d\n", error);
287 return error;
288 }
289
290 msleep(RM_RESET_DELAY_MSEC);
291
292 return 0;
293}
294
295static int raydium_i2c_query_ts_bootloader_info(struct raydium_data *ts)
296{
297 struct i2c_client *client = ts->client;
298 static const u8 get_hwid[] = { RM_BOOT_CMD_READHWID,
299 0x10, 0xc0, 0x01, 0x00, 0x04, 0x00 };
300 u8 rbuf[5] = { 0 };
301 u32 hw_ver;
302 int error;
303
304 error = raydium_i2c_send(client, RM_CMD_BOOT_WRT,
305 get_hwid, sizeof(get_hwid));
306 if (error) {
307 dev_err(&client->dev, "WRT HWID command failed: %d\n", error);
308 return error;
309 }
310
311 error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, rbuf, 1);
312 if (error) {
313 dev_err(&client->dev, "Ack HWID command failed: %d\n", error);
314 return error;
315 }
316
317 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK, rbuf, sizeof(rbuf));
318 if (error) {
319 dev_err(&client->dev, "Read HWID command failed: %d (%4ph)\n",
320 error, rbuf + 1);
321 hw_ver = 0xffffffffUL;
322 } else {
323 hw_ver = get_unaligned_be32(rbuf + 1);
324 }
325
326 ts->info.hw_ver = cpu_to_le32(hw_ver);
327 ts->info.main_ver = 0xff;
328 ts->info.sub_ver = 0xff;
329
330 return error;
331}
332
333static int raydium_i2c_query_ts_info(struct raydium_data *ts)
334{
335 struct i2c_client *client = ts->client;
336 struct raydium_data_info data_info;
337 __le32 query_bank_addr;
338
339 int error, retry_cnt;
340
341 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
342 error = raydium_i2c_read(client, RM_CMD_DATA_BANK,
343 &data_info, sizeof(data_info));
344 if (error)
345 continue;
346
347 /*
348 * Warn user if we already allocated memory for reports and
349 * then the size changed (due to firmware update?) and keep
350 * old size instead.
351 */
352 if (ts->report_data && ts->pkg_size != data_info.pkg_size) {
353 dev_warn(&client->dev,
354 "report size changes, was: %d, new: %d\n",
355 ts->pkg_size, data_info.pkg_size);
356 } else {
357 ts->pkg_size = data_info.pkg_size;
358 ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE;
359 }
360
361 ts->contact_size = data_info.tp_info_size;
362 ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr);
363
364 dev_dbg(&client->dev,
365 "data_bank_addr: %#08x, report_size: %d, contact_size: %d\n",
366 ts->data_bank_addr, ts->report_size, ts->contact_size);
367
368 error = raydium_i2c_read(client, RM_CMD_QUERY_BANK,
369 &query_bank_addr,
370 sizeof(query_bank_addr));
371 if (error)
372 continue;
373
374 error = raydium_i2c_read(client, le32_to_cpu(query_bank_addr),
375 &ts->info, sizeof(ts->info));
376 if (error)
377 continue;
378
379 return 0;
380 }
381
382 dev_err(&client->dev, "failed to query device parameters: %d\n", error);
383 return error;
384}
385
386static int raydium_i2c_check_fw_status(struct raydium_data *ts)
387{
388 struct i2c_client *client = ts->client;
389 static const u8 bl_ack = 0x62;
390 static const u8 main_ack = 0x66;
391 u8 buf[4];
392 int error;
393
394 error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf));
395 if (!error) {
396 if (buf[0] == bl_ack)
397 ts->boot_mode = RAYDIUM_TS_BLDR;
398 else if (buf[0] == main_ack)
399 ts->boot_mode = RAYDIUM_TS_MAIN;
400 return 0;
401 }
402
403 return error;
404}
405
406static int raydium_i2c_initialize(struct raydium_data *ts)
407{
408 struct i2c_client *client = ts->client;
409 int error, retry_cnt;
410
411 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
412 /* Wait for Hello packet */
413 msleep(RM_BOOT_DELAY_MS);
414
415 error = raydium_i2c_check_fw_status(ts);
416 if (error) {
417 dev_err(&client->dev,
418 "failed to read 'hello' packet: %d\n", error);
419 continue;
420 }
421
422 if (ts->boot_mode == RAYDIUM_TS_BLDR ||
423 ts->boot_mode == RAYDIUM_TS_MAIN) {
424 break;
425 }
426 }
427
428 if (error)
429 ts->boot_mode = RAYDIUM_TS_BLDR;
430
431 if (ts->boot_mode == RAYDIUM_TS_BLDR)
432 raydium_i2c_query_ts_bootloader_info(ts);
433 else
434 raydium_i2c_query_ts_info(ts);
435
436 return error;
437}
438
439static int raydium_i2c_bl_chk_state(struct i2c_client *client,
440 enum raydium_bl_ack state)
441{
442 static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 };
443 u8 rbuf[sizeof(ack_ok)];
444 u8 retry;
445 int error;
446
447 for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) {
448 switch (state) {
449 case RAYDIUM_ACK_NULL:
450 return 0;
451
452 case RAYDIUM_WAIT_READY:
453 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
454 &rbuf[0], 1);
455 if (!error && rbuf[0] == RM_BOOT_RDY)
456 return 0;
457
458 break;
459
460 case RAYDIUM_PATH_READY:
461 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
462 rbuf, sizeof(rbuf));
463 if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok)))
464 return 0;
465
466 break;
467
468 default:
469 dev_err(&client->dev, "%s: invalid target state %d\n",
470 __func__, state);
471 return -EINVAL;
472 }
473
474 msleep(20);
475 }
476
477 return -ETIMEDOUT;
478}
479
480static int raydium_i2c_write_object(struct i2c_client *client,
481 const void *data, size_t len,
482 enum raydium_bl_ack state)
483{
484 int error;
485 static const u8 cmd[] = { 0xFF, 0x39 };
486
487 error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
488 if (error) {
489 dev_err(&client->dev, "WRT obj command failed: %d\n",
490 error);
491 return error;
492 }
493
494 error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, cmd, sizeof(cmd));
495 if (error) {
496 dev_err(&client->dev, "Ack obj command failed: %d\n", error);
497 return error;
498 }
499
500 error = raydium_i2c_bl_chk_state(client, state);
501 if (error) {
502 dev_err(&client->dev, "BL check state failed: %d\n", error);
503 return error;
504 }
505 return 0;
506}
507
508static int raydium_i2c_boot_trigger(struct i2c_client *client)
509{
510 static const u8 cmd[7][6] = {
511 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 },
512 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
513 { 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 },
514 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
515 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 },
516 { 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 },
517 { 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 },
518 };
519 int i;
520 int error;
521
522 for (i = 0; i < 7; i++) {
523 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
524 RAYDIUM_WAIT_READY);
525 if (error) {
526 dev_err(&client->dev,
527 "boot trigger failed at step %d: %d\n",
528 i, error);
529 return error;
530 }
531 }
532
533 return 0;
534}
535
536static int raydium_i2c_fw_trigger(struct i2c_client *client)
537{
538 static const u8 cmd[5][11] = {
539 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 },
540 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
541 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
542 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
543 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
544 };
545 int i;
546 int error;
547
548 for (i = 0; i < 5; i++) {
549 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
550 RAYDIUM_ACK_NULL);
551 if (error) {
552 dev_err(&client->dev,
553 "fw trigger failed at step %d: %d\n",
554 i, error);
555 return error;
556 }
557 }
558
559 return 0;
560}
561
562static int raydium_i2c_check_path(struct i2c_client *client)
563{
564 static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 };
565 int error;
566
567 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
568 RAYDIUM_PATH_READY);
569 if (error) {
570 dev_err(&client->dev, "check path command failed: %d\n", error);
571 return error;
572 }
573
574 return 0;
575}
576
577static int raydium_i2c_enter_bl(struct i2c_client *client)
578{
579 static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 };
580 int error;
581
582 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
583 RAYDIUM_ACK_NULL);
584 if (error) {
585 dev_err(&client->dev, "enter bl command failed: %d\n", error);
586 return error;
587 }
588
589 msleep(RM_BOOT_DELAY_MS);
590 return 0;
591}
592
593static int raydium_i2c_leave_bl(struct i2c_client *client)
594{
595 static const u8 leave_cmd[] = { 0x05, 0x00 };
596 int error;
597
598 error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd),
599 RAYDIUM_ACK_NULL);
600 if (error) {
601 dev_err(&client->dev, "leave bl command failed: %d\n", error);
602 return error;
603 }
604
605 msleep(RM_BOOT_DELAY_MS);
606 return 0;
607}
608
609static int raydium_i2c_write_checksum(struct i2c_client *client,
610 size_t length, u16 checksum)
611{
612 u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 };
613 int error;
614
615 put_unaligned_le16(length, &checksum_cmd[3]);
616 put_unaligned_le16(checksum, &checksum_cmd[5]);
617
618 error = raydium_i2c_write_object(client,
619 checksum_cmd, sizeof(checksum_cmd),
620 RAYDIUM_ACK_NULL);
621 if (error) {
622 dev_err(&client->dev, "failed to write checksum: %d\n",
623 error);
624 return error;
625 }
626
627 return 0;
628}
629
630static int raydium_i2c_disable_watch_dog(struct i2c_client *client)
631{
632 static const u8 cmd[] = { 0x0A, 0xAA };
633 int error;
634
635 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
636 RAYDIUM_WAIT_READY);
637 if (error) {
638 dev_err(&client->dev, "disable watchdog command failed: %d\n",
639 error);
640 return error;
641 }
642
643 return 0;
644}
645
646static int raydium_i2c_fw_write_page(struct i2c_client *client,
647 u16 page_idx, const void *data, size_t len)
648{
649 u8 buf[RM_BL_WRT_LEN];
650 size_t xfer_len;
651 int error;
652 int i;
653
654 BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0);
655
656 for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) {
657 buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT;
658 buf[BL_PAGE_STR] = page_idx ? 0xff : 0;
659 buf[BL_PKG_IDX] = i + 1;
660
661 xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE);
662 memcpy(&buf[BL_DATA_STR], data, xfer_len);
663 if (len < RM_BL_WRT_PKG_SIZE)
664 memset(&buf[BL_DATA_STR + xfer_len], 0xff,
665 RM_BL_WRT_PKG_SIZE - xfer_len);
666
667 error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN,
668 RAYDIUM_WAIT_READY);
669 if (error) {
670 dev_err(&client->dev,
671 "page write command failed for page %d, chunk %d: %d\n",
672 page_idx, i, error);
673 return error;
674 }
675
676 data += xfer_len;
677 len -= xfer_len;
678 }
679
680 return error;
681}
682
683static u16 raydium_calc_chksum(const u8 *buf, u16 len)
684{
685 u16 checksum = 0;
686 u16 i;
687
688 for (i = 0; i < len; i++)
689 checksum += buf[i];
690
691 return checksum;
692}
693
694static int raydium_i2c_do_update_firmware(struct raydium_data *ts,
695 const struct firmware *fw)
696{
697 struct i2c_client *client = ts->client;
698 const void *data;
699 size_t data_len;
700 size_t len;
701 int page_nr;
702 int i;
703 int error;
704 u16 fw_checksum;
705
706 if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) {
707 dev_err(&client->dev, "Invalid firmware length\n");
708 return -EINVAL;
709 }
710
711 error = raydium_i2c_check_fw_status(ts);
712 if (error) {
713 dev_err(&client->dev, "Unable to access IC %d\n", error);
714 return error;
715 }
716
717 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
718 for (i = 0; i < RM_MAX_RETRIES; i++) {
719 error = raydium_i2c_enter_bl(client);
720 if (!error) {
721 error = raydium_i2c_check_fw_status(ts);
722 if (error) {
723 dev_err(&client->dev,
724 "unable to access IC: %d\n",
725 error);
726 return error;
727 }
728
729 if (ts->boot_mode == RAYDIUM_TS_BLDR)
730 break;
731 }
732 }
733
734 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
735 dev_err(&client->dev,
736 "failed to jump to boot loader: %d\n",
737 error);
738 return -EIO;
739 }
740 }
741
742 error = raydium_i2c_disable_watch_dog(client);
743 if (error)
744 return error;
745
746 error = raydium_i2c_check_path(client);
747 if (error)
748 return error;
749
750 error = raydium_i2c_boot_trigger(client);
751 if (error) {
752 dev_err(&client->dev, "send boot trigger fail: %d\n", error);
753 return error;
754 }
755
756 msleep(RM_BOOT_DELAY_MS);
757
758 data = fw->data;
759 data_len = fw->size;
760 page_nr = 0;
761
762 while (data_len) {
763 len = min_t(size_t, data_len, RM_FW_PAGE_SIZE);
764
765 error = raydium_i2c_fw_write_page(client, page_nr++, data, len);
766 if (error)
767 return error;
768
769 msleep(20);
770
771 data += len;
772 data_len -= len;
773 }
774
775 error = raydium_i2c_leave_bl(client);
776 if (error) {
777 dev_err(&client->dev,
778 "failed to leave boot loader: %d\n", error);
779 return error;
780 }
781
782 dev_dbg(&client->dev, "left boot loader mode\n");
783 msleep(RM_BOOT_DELAY_MS);
784
785 error = raydium_i2c_check_fw_status(ts);
786 if (error) {
787 dev_err(&client->dev,
788 "failed to check fw status after write: %d\n",
789 error);
790 return error;
791 }
792
793 if (ts->boot_mode != RAYDIUM_TS_MAIN) {
794 dev_err(&client->dev,
795 "failed to switch to main fw after writing firmware: %d\n",
796 error);
797 return -EINVAL;
798 }
799
800 error = raydium_i2c_fw_trigger(client);
801 if (error) {
802 dev_err(&client->dev, "failed to trigger fw: %d\n", error);
803 return error;
804 }
805
806 fw_checksum = raydium_calc_chksum(fw->data, fw->size);
807
808 error = raydium_i2c_write_checksum(client, fw->size, fw_checksum);
809 if (error)
810 return error;
811
812 return 0;
813}
814
815static int raydium_i2c_fw_update(struct raydium_data *ts)
816{
817 struct i2c_client *client = ts->client;
818 const struct firmware *fw = NULL;
819 char *fw_file;
820 int error;
821
822 fw_file = kasprintf(GFP_KERNEL, "raydium_%#04x.fw",
823 le32_to_cpu(ts->info.hw_ver));
824 if (!fw_file)
825 return -ENOMEM;
826
827 dev_dbg(&client->dev, "firmware name: %s\n", fw_file);
828
829 error = request_firmware(&fw, fw_file, &client->dev);
830 if (error) {
831 dev_err(&client->dev, "Unable to open firmware %s\n", fw_file);
832 goto out_free_fw_file;
833 }
834
835 disable_irq(client->irq);
836
837 error = raydium_i2c_do_update_firmware(ts, fw);
838 if (error) {
839 dev_err(&client->dev, "firmware update failed: %d\n", error);
840 ts->boot_mode = RAYDIUM_TS_BLDR;
841 goto out_enable_irq;
842 }
843
844 error = raydium_i2c_initialize(ts);
845 if (error) {
846 dev_err(&client->dev,
847 "failed to initialize device after firmware update: %d\n",
848 error);
849 ts->boot_mode = RAYDIUM_TS_BLDR;
850 goto out_enable_irq;
851 }
852
853 ts->boot_mode = RAYDIUM_TS_MAIN;
854
855out_enable_irq:
856 enable_irq(client->irq);
857 msleep(100);
858
859 release_firmware(fw);
860
861out_free_fw_file:
862 kfree(fw_file);
863
864 return error;
865}
866
867static void raydium_mt_event(struct raydium_data *ts)
868{
869 int i;
870
871 for (i = 0; i < ts->report_size / ts->contact_size; i++) {
872 u8 *contact = &ts->report_data[ts->contact_size * i];
873 bool state = contact[RM_CONTACT_STATE_POS];
874 u8 wx, wy;
875
876 input_mt_slot(ts->input, i);
877 input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state);
878
879 if (!state)
880 continue;
881
882 input_report_abs(ts->input, ABS_MT_POSITION_X,
883 get_unaligned_le16(&contact[RM_CONTACT_X_POS]));
884 input_report_abs(ts->input, ABS_MT_POSITION_Y,
885 get_unaligned_le16(&contact[RM_CONTACT_Y_POS]));
886 input_report_abs(ts->input, ABS_MT_PRESSURE,
887 contact[RM_CONTACT_PRESSURE_POS]);
888
889 wx = contact[RM_CONTACT_WIDTH_X_POS];
890 wy = contact[RM_CONTACT_WIDTH_Y_POS];
891
892 input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy));
893 input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy));
894 }
895
896 input_mt_sync_frame(ts->input);
897 input_sync(ts->input);
898}
899
900static irqreturn_t raydium_i2c_irq(int irq, void *_dev)
901{
902 struct raydium_data *ts = _dev;
903 int error;
904 u16 fw_crc;
905 u16 calc_crc;
906
907 if (ts->boot_mode != RAYDIUM_TS_MAIN)
908 goto out;
909
910 error = raydium_i2c_read(ts->client, ts->data_bank_addr,
911 ts->report_data, ts->pkg_size);
912 if (error)
913 goto out;
914
915 fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]);
916 calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size);
917 if (unlikely(fw_crc != calc_crc)) {
918 dev_warn(&ts->client->dev,
919 "%s: invalid packet crc %#04x vs %#04x\n",
920 __func__, calc_crc, fw_crc);
921 goto out;
922 }
923
924 raydium_mt_event(ts);
925
926out:
927 return IRQ_HANDLED;
928}
929
930static ssize_t raydium_i2c_fw_ver_show(struct device *dev,
931 struct device_attribute *attr, char *buf)
932{
933 struct i2c_client *client = to_i2c_client(dev);
934 struct raydium_data *ts = i2c_get_clientdata(client);
935
936 return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);
937}
938
939static ssize_t raydium_i2c_hw_ver_show(struct device *dev,
940 struct device_attribute *attr, char *buf)
941{
942 struct i2c_client *client = to_i2c_client(dev);
943 struct raydium_data *ts = i2c_get_clientdata(client);
944
945 return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver));
946}
947
948static ssize_t raydium_i2c_boot_mode_show(struct device *dev,
949 struct device_attribute *attr,
950 char *buf)
951{
952 struct i2c_client *client = to_i2c_client(dev);
953 struct raydium_data *ts = i2c_get_clientdata(client);
954
955 return sprintf(buf, "%s\n",
956 ts->boot_mode == RAYDIUM_TS_MAIN ?
957 "Normal" : "Recovery");
958}
959
960static ssize_t raydium_i2c_update_fw_store(struct device *dev,
961 struct device_attribute *attr,
962 const char *buf, size_t count)
963{
964 struct i2c_client *client = to_i2c_client(dev);
965 struct raydium_data *ts = i2c_get_clientdata(client);
966 int error;
967
968 error = mutex_lock_interruptible(&ts->sysfs_mutex);
969 if (error)
970 return error;
971
972 error = raydium_i2c_fw_update(ts);
973
974 mutex_unlock(&ts->sysfs_mutex);
975
976 return error ?: count;
977}
978
979static ssize_t raydium_i2c_calibrate_store(struct device *dev,
980 struct device_attribute *attr,
981 const char *buf, size_t count)
982{
983 struct i2c_client *client = to_i2c_client(dev);
984 struct raydium_data *ts = i2c_get_clientdata(client);
985 static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E };
986 int error;
987
988 error = mutex_lock_interruptible(&ts->sysfs_mutex);
989 if (error)
990 return error;
991
992 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
993 RAYDIUM_WAIT_READY);
994 if (error)
995 dev_err(&client->dev, "calibrate command failed: %d\n", error);
996
997 mutex_unlock(&ts->sysfs_mutex);
998 return error ?: count;
999}
1000
1001static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL);
1002static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL);
1003static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL);
1004static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store);
1005static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store);
1006
1007static struct attribute *raydium_i2c_attrs[] = {
1008 &dev_attr_update_fw.attr,
1009 &dev_attr_boot_mode.attr,
1010 &dev_attr_fw_version.attr,
1011 &dev_attr_hw_version.attr,
1012 &dev_attr_calibrate.attr,
1013 NULL
1014};
1015ATTRIBUTE_GROUPS(raydium_i2c);
1016
1017static int raydium_i2c_power_on(struct raydium_data *ts)
1018{
1019 int error;
1020
1021 if (!ts->reset_gpio)
1022 return 0;
1023
1024 gpiod_set_value_cansleep(ts->reset_gpio, 1);
1025
1026 error = regulator_enable(ts->avdd);
1027 if (error) {
1028 dev_err(&ts->client->dev,
1029 "failed to enable avdd regulator: %d\n", error);
1030 goto release_reset_gpio;
1031 }
1032
1033 error = regulator_enable(ts->vccio);
1034 if (error) {
1035 regulator_disable(ts->avdd);
1036 dev_err(&ts->client->dev,
1037 "failed to enable vccio regulator: %d\n", error);
1038 goto release_reset_gpio;
1039 }
1040
1041 udelay(RM_POWERON_DELAY_USEC);
1042
1043release_reset_gpio:
1044 gpiod_set_value_cansleep(ts->reset_gpio, 0);
1045
1046 if (error)
1047 return error;
1048
1049 msleep(RM_RESET_DELAY_MSEC);
1050
1051 return 0;
1052}
1053
1054static void raydium_i2c_power_off(void *_data)
1055{
1056 struct raydium_data *ts = _data;
1057
1058 if (ts->reset_gpio) {
1059 gpiod_set_value_cansleep(ts->reset_gpio, 1);
1060 regulator_disable(ts->vccio);
1061 regulator_disable(ts->avdd);
1062 }
1063}
1064
1065static int raydium_i2c_probe(struct i2c_client *client)
1066{
1067 union i2c_smbus_data dummy;
1068 struct raydium_data *ts;
1069 int error;
1070
1071 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1072 dev_err(&client->dev,
1073 "i2c check functionality error (need I2C_FUNC_I2C)\n");
1074 return -ENXIO;
1075 }
1076
1077 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
1078 if (!ts)
1079 return -ENOMEM;
1080
1081 mutex_init(&ts->sysfs_mutex);
1082
1083 ts->client = client;
1084 i2c_set_clientdata(client, ts);
1085
1086 ts->avdd = devm_regulator_get(&client->dev, "avdd");
1087 if (IS_ERR(ts->avdd))
1088 return dev_err_probe(&client->dev, PTR_ERR(ts->avdd),
1089 "Failed to get 'avdd' regulator\n");
1090
1091 ts->vccio = devm_regulator_get(&client->dev, "vccio");
1092 if (IS_ERR(ts->vccio))
1093 return dev_err_probe(&client->dev, PTR_ERR(ts->vccio),
1094 "Failed to get 'vccio' regulator\n");
1095
1096 ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
1097 GPIOD_OUT_LOW);
1098 if (IS_ERR(ts->reset_gpio))
1099 return dev_err_probe(&client->dev, PTR_ERR(ts->reset_gpio),
1100 "Failed to get reset gpio\n");
1101
1102 error = raydium_i2c_power_on(ts);
1103 if (error)
1104 return error;
1105
1106 error = devm_add_action_or_reset(&client->dev,
1107 raydium_i2c_power_off, ts);
1108 if (error) {
1109 dev_err(&client->dev,
1110 "failed to install power off action: %d\n", error);
1111 return error;
1112 }
1113
1114 /* Make sure there is something at this address */
1115 if (i2c_smbus_xfer(client->adapter, client->addr, 0,
1116 I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
1117 dev_err(&client->dev, "nothing at this address\n");
1118 return -ENXIO;
1119 }
1120
1121 error = raydium_i2c_initialize(ts);
1122 if (error) {
1123 dev_err(&client->dev, "failed to initialize: %d\n", error);
1124 return error;
1125 }
1126
1127 ts->report_data = devm_kmalloc(&client->dev,
1128 ts->pkg_size, GFP_KERNEL);
1129 if (!ts->report_data)
1130 return -ENOMEM;
1131
1132 ts->input = devm_input_allocate_device(&client->dev);
1133 if (!ts->input) {
1134 dev_err(&client->dev, "Failed to allocate input device\n");
1135 return -ENOMEM;
1136 }
1137
1138 ts->input->name = "Raydium Touchscreen";
1139 ts->input->id.bustype = BUS_I2C;
1140
1141 input_set_abs_params(ts->input, ABS_MT_POSITION_X,
1142 0, le16_to_cpu(ts->info.x_max), 0, 0);
1143 input_set_abs_params(ts->input, ABS_MT_POSITION_Y,
1144 0, le16_to_cpu(ts->info.y_max), 0, 0);
1145 input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);
1146 input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);
1147
1148 input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
1149 input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
1150
1151 error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM,
1152 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
1153 if (error) {
1154 dev_err(&client->dev,
1155 "failed to initialize MT slots: %d\n", error);
1156 return error;
1157 }
1158
1159 error = input_register_device(ts->input);
1160 if (error) {
1161 dev_err(&client->dev,
1162 "unable to register input device: %d\n", error);
1163 return error;
1164 }
1165
1166 error = devm_request_threaded_irq(&client->dev, client->irq,
1167 NULL, raydium_i2c_irq,
1168 IRQF_ONESHOT, client->name, ts);
1169 if (error) {
1170 dev_err(&client->dev, "Failed to register interrupt\n");
1171 return error;
1172 }
1173
1174 return 0;
1175}
1176
1177static void raydium_enter_sleep(struct i2c_client *client)
1178{
1179 static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f };
1180 int error;
1181
1182 error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP,
1183 sleep_cmd, sizeof(sleep_cmd));
1184 if (error)
1185 dev_err(&client->dev,
1186 "sleep command failed: %d\n", error);
1187}
1188
1189static int raydium_i2c_suspend(struct device *dev)
1190{
1191 struct i2c_client *client = to_i2c_client(dev);
1192 struct raydium_data *ts = i2c_get_clientdata(client);
1193
1194 /* Sleep is not available in BLDR recovery mode */
1195 if (ts->boot_mode != RAYDIUM_TS_MAIN)
1196 return -EBUSY;
1197
1198 disable_irq(client->irq);
1199
1200 if (device_may_wakeup(dev)) {
1201 raydium_enter_sleep(client);
1202 } else {
1203 raydium_i2c_power_off(ts);
1204 }
1205
1206 return 0;
1207}
1208
1209static int raydium_i2c_resume(struct device *dev)
1210{
1211 struct i2c_client *client = to_i2c_client(dev);
1212 struct raydium_data *ts = i2c_get_clientdata(client);
1213
1214 if (device_may_wakeup(dev)) {
1215 raydium_i2c_sw_reset(client);
1216 } else {
1217 raydium_i2c_power_on(ts);
1218 raydium_i2c_initialize(ts);
1219 }
1220
1221 enable_irq(client->irq);
1222
1223 return 0;
1224}
1225
1226static DEFINE_SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
1227 raydium_i2c_suspend, raydium_i2c_resume);
1228
1229static const struct i2c_device_id raydium_i2c_id[] = {
1230 { "raydium_i2c" },
1231 { "rm32380" },
1232 { /* sentinel */ }
1233};
1234MODULE_DEVICE_TABLE(i2c, raydium_i2c_id);
1235
1236#ifdef CONFIG_ACPI
1237static const struct acpi_device_id raydium_acpi_id[] = {
1238 { "RAYD0001", 0 },
1239 { /* sentinel */ }
1240};
1241MODULE_DEVICE_TABLE(acpi, raydium_acpi_id);
1242#endif
1243
1244#ifdef CONFIG_OF
1245static const struct of_device_id raydium_of_match[] = {
1246 { .compatible = "raydium,rm32380", },
1247 { /* sentinel */ }
1248};
1249MODULE_DEVICE_TABLE(of, raydium_of_match);
1250#endif
1251
1252static struct i2c_driver raydium_i2c_driver = {
1253 .probe = raydium_i2c_probe,
1254 .id_table = raydium_i2c_id,
1255 .driver = {
1256 .name = "raydium_ts",
1257 .dev_groups = raydium_i2c_groups,
1258 .pm = pm_sleep_ptr(&raydium_i2c_pm_ops),
1259 .acpi_match_table = ACPI_PTR(raydium_acpi_id),
1260 .of_match_table = of_match_ptr(raydium_of_match),
1261 },
1262};
1263module_i2c_driver(raydium_i2c_driver);
1264
1265MODULE_AUTHOR("Raydium");
1266MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");
1267MODULE_LICENSE("GPL v2");
1/*
2 * Raydium touchscreen I2C driver.
3 *
4 * Copyright (C) 2012-2014, Raydium Semiconductor Corporation.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2, and only version 2, as published by the
9 * Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * Raydium reserves the right to make changes without further notice
17 * to the materials described herein. Raydium does not assume any
18 * liability arising out of the application described herein.
19 *
20 * Contact Raydium Semiconductor Corporation at www.rad-ic.com
21 */
22
23#include <linux/acpi.h>
24#include <linux/delay.h>
25#include <linux/firmware.h>
26#include <linux/gpio/consumer.h>
27#include <linux/i2c.h>
28#include <linux/input.h>
29#include <linux/input/mt.h>
30#include <linux/interrupt.h>
31#include <linux/module.h>
32#include <linux/of.h>
33#include <linux/regulator/consumer.h>
34#include <linux/slab.h>
35#include <asm/unaligned.h>
36
37/* Slave I2C mode */
38#define RM_BOOT_BLDR 0x02
39#define RM_BOOT_MAIN 0x03
40
41/* I2C bootoloader commands */
42#define RM_CMD_BOOT_PAGE_WRT 0x0B /* send bl page write */
43#define RM_CMD_BOOT_WRT 0x11 /* send bl write */
44#define RM_CMD_BOOT_ACK 0x22 /* send ack*/
45#define RM_CMD_BOOT_CHK 0x33 /* send data check */
46#define RM_CMD_BOOT_READ 0x44 /* send wait bl data ready*/
47
48#define RM_BOOT_RDY 0xFF /* bl data ready */
49
50/* I2C main commands */
51#define RM_CMD_QUERY_BANK 0x2B
52#define RM_CMD_DATA_BANK 0x4D
53#define RM_CMD_ENTER_SLEEP 0x4E
54#define RM_CMD_BANK_SWITCH 0xAA
55
56#define RM_RESET_MSG_ADDR 0x40000004
57
58#define RM_MAX_READ_SIZE 56
59#define RM_PACKET_CRC_SIZE 2
60
61/* Touch relative info */
62#define RM_MAX_RETRIES 3
63#define RM_MAX_TOUCH_NUM 10
64#define RM_BOOT_DELAY_MS 100
65
66/* Offsets in contact data */
67#define RM_CONTACT_STATE_POS 0
68#define RM_CONTACT_X_POS 1
69#define RM_CONTACT_Y_POS 3
70#define RM_CONTACT_PRESSURE_POS 5
71#define RM_CONTACT_WIDTH_X_POS 6
72#define RM_CONTACT_WIDTH_Y_POS 7
73
74/* Bootloader relative info */
75#define RM_BL_WRT_CMD_SIZE 3 /* bl flash wrt cmd size */
76#define RM_BL_WRT_PKG_SIZE 32 /* bl wrt pkg size */
77#define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE)
78#define RM_FW_PAGE_SIZE 128
79#define RM_MAX_FW_RETRIES 30
80#define RM_MAX_FW_SIZE 0xD000
81
82#define RM_POWERON_DELAY_USEC 500
83#define RM_RESET_DELAY_MSEC 50
84
85enum raydium_bl_cmd {
86 BL_HEADER = 0,
87 BL_PAGE_STR,
88 BL_PKG_IDX,
89 BL_DATA_STR,
90};
91
92enum raydium_bl_ack {
93 RAYDIUM_ACK_NULL = 0,
94 RAYDIUM_WAIT_READY,
95 RAYDIUM_PATH_READY,
96};
97
98enum raydium_boot_mode {
99 RAYDIUM_TS_MAIN = 0,
100 RAYDIUM_TS_BLDR,
101};
102
103/* Response to RM_CMD_DATA_BANK request */
104struct raydium_data_info {
105 __le32 data_bank_addr;
106 u8 pkg_size;
107 u8 tp_info_size;
108};
109
110struct raydium_info {
111 __le32 hw_ver; /*device version */
112 u8 main_ver;
113 u8 sub_ver;
114 __le16 ft_ver; /* test version */
115 u8 x_num;
116 u8 y_num;
117 __le16 x_max;
118 __le16 y_max;
119 u8 x_res; /* units/mm */
120 u8 y_res; /* units/mm */
121};
122
123/* struct raydium_data - represents state of Raydium touchscreen device */
124struct raydium_data {
125 struct i2c_client *client;
126 struct input_dev *input;
127
128 struct regulator *avdd;
129 struct regulator *vccio;
130 struct gpio_desc *reset_gpio;
131
132 struct raydium_info info;
133
134 struct mutex sysfs_mutex;
135
136 u8 *report_data;
137
138 u32 data_bank_addr;
139 u8 report_size;
140 u8 contact_size;
141 u8 pkg_size;
142
143 enum raydium_boot_mode boot_mode;
144
145 bool wake_irq_enabled;
146};
147
148static int raydium_i2c_send(struct i2c_client *client,
149 u8 addr, const void *data, size_t len)
150{
151 u8 *buf;
152 int tries = 0;
153 int ret;
154
155 buf = kmalloc(len + 1, GFP_KERNEL);
156 if (!buf)
157 return -ENOMEM;
158
159 buf[0] = addr;
160 memcpy(buf + 1, data, len);
161
162 do {
163 ret = i2c_master_send(client, buf, len + 1);
164 if (likely(ret == len + 1))
165 break;
166
167 msleep(20);
168 } while (++tries < RM_MAX_RETRIES);
169
170 kfree(buf);
171
172 if (unlikely(ret != len + 1)) {
173 if (ret >= 0)
174 ret = -EIO;
175 dev_err(&client->dev, "%s failed: %d\n", __func__, ret);
176 return ret;
177 }
178
179 return 0;
180}
181
182static int raydium_i2c_read(struct i2c_client *client,
183 u8 addr, void *data, size_t len)
184{
185 struct i2c_msg xfer[] = {
186 {
187 .addr = client->addr,
188 .len = 1,
189 .buf = &addr,
190 },
191 {
192 .addr = client->addr,
193 .flags = I2C_M_RD,
194 .len = len,
195 .buf = data,
196 }
197 };
198 int ret;
199
200 ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer));
201 if (unlikely(ret != ARRAY_SIZE(xfer)))
202 return ret < 0 ? ret : -EIO;
203
204 return 0;
205}
206
207static int raydium_i2c_read_message(struct i2c_client *client,
208 u32 addr, void *data, size_t len)
209{
210 __be32 be_addr;
211 size_t xfer_len;
212 int error;
213
214 while (len) {
215 xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
216
217 be_addr = cpu_to_be32(addr);
218
219 error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH,
220 &be_addr, sizeof(be_addr));
221 if (!error)
222 error = raydium_i2c_read(client, addr & 0xff,
223 data, xfer_len);
224 if (error)
225 return error;
226
227 len -= xfer_len;
228 data += xfer_len;
229 addr += xfer_len;
230 }
231
232 return 0;
233}
234
235static int raydium_i2c_send_message(struct i2c_client *client,
236 u32 addr, const void *data, size_t len)
237{
238 __be32 be_addr = cpu_to_be32(addr);
239 int error;
240
241 error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH,
242 &be_addr, sizeof(be_addr));
243 if (!error)
244 error = raydium_i2c_send(client, addr & 0xff, data, len);
245
246 return error;
247}
248
249static int raydium_i2c_sw_reset(struct i2c_client *client)
250{
251 const u8 soft_rst_cmd = 0x01;
252 int error;
253
254 error = raydium_i2c_send_message(client, RM_RESET_MSG_ADDR,
255 &soft_rst_cmd, sizeof(soft_rst_cmd));
256 if (error) {
257 dev_err(&client->dev, "software reset failed: %d\n", error);
258 return error;
259 }
260
261 msleep(RM_RESET_DELAY_MSEC);
262
263 return 0;
264}
265
266static int raydium_i2c_query_ts_info(struct raydium_data *ts)
267{
268 struct i2c_client *client = ts->client;
269 struct raydium_data_info data_info;
270 __le32 query_bank_addr;
271
272 int error, retry_cnt;
273
274 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
275 error = raydium_i2c_read(client, RM_CMD_DATA_BANK,
276 &data_info, sizeof(data_info));
277 if (error)
278 continue;
279
280 /*
281 * Warn user if we already allocated memory for reports and
282 * then the size changed (due to firmware update?) and keep
283 * old size instead.
284 */
285 if (ts->report_data && ts->pkg_size != data_info.pkg_size) {
286 dev_warn(&client->dev,
287 "report size changes, was: %d, new: %d\n",
288 ts->pkg_size, data_info.pkg_size);
289 } else {
290 ts->pkg_size = data_info.pkg_size;
291 ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE;
292 }
293
294 ts->contact_size = data_info.tp_info_size;
295 ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr);
296
297 dev_dbg(&client->dev,
298 "data_bank_addr: %#08x, report_size: %d, contact_size: %d\n",
299 ts->data_bank_addr, ts->report_size, ts->contact_size);
300
301 error = raydium_i2c_read(client, RM_CMD_QUERY_BANK,
302 &query_bank_addr,
303 sizeof(query_bank_addr));
304 if (error)
305 continue;
306
307 error = raydium_i2c_read_message(client,
308 le32_to_cpu(query_bank_addr),
309 &ts->info, sizeof(ts->info));
310 if (error)
311 continue;
312
313 return 0;
314 }
315
316 dev_err(&client->dev, "failed to query device parameters: %d\n", error);
317 return error;
318}
319
320static int raydium_i2c_check_fw_status(struct raydium_data *ts)
321{
322 struct i2c_client *client = ts->client;
323 static const u8 bl_ack = 0x62;
324 static const u8 main_ack = 0x66;
325 u8 buf[4];
326 int error;
327
328 error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf));
329 if (!error) {
330 if (buf[0] == bl_ack)
331 ts->boot_mode = RAYDIUM_TS_BLDR;
332 else if (buf[0] == main_ack)
333 ts->boot_mode = RAYDIUM_TS_MAIN;
334 return 0;
335 }
336
337 return error;
338}
339
340static int raydium_i2c_initialize(struct raydium_data *ts)
341{
342 struct i2c_client *client = ts->client;
343 int error, retry_cnt;
344
345 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
346 /* Wait for Hello packet */
347 msleep(RM_BOOT_DELAY_MS);
348
349 error = raydium_i2c_check_fw_status(ts);
350 if (error) {
351 dev_err(&client->dev,
352 "failed to read 'hello' packet: %d\n", error);
353 continue;
354 }
355
356 if (ts->boot_mode == RAYDIUM_TS_BLDR ||
357 ts->boot_mode == RAYDIUM_TS_MAIN) {
358 break;
359 }
360 }
361
362 if (error)
363 ts->boot_mode = RAYDIUM_TS_BLDR;
364
365 if (ts->boot_mode == RAYDIUM_TS_BLDR) {
366 ts->info.hw_ver = cpu_to_le32(0xffffffffUL);
367 ts->info.main_ver = 0xff;
368 ts->info.sub_ver = 0xff;
369 } else {
370 raydium_i2c_query_ts_info(ts);
371 }
372
373 return error;
374}
375
376static int raydium_i2c_bl_chk_state(struct i2c_client *client,
377 enum raydium_bl_ack state)
378{
379 static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 };
380 u8 rbuf[sizeof(ack_ok)];
381 u8 retry;
382 int error;
383
384 for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) {
385 switch (state) {
386 case RAYDIUM_ACK_NULL:
387 return 0;
388
389 case RAYDIUM_WAIT_READY:
390 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
391 &rbuf[0], 1);
392 if (!error && rbuf[0] == RM_BOOT_RDY)
393 return 0;
394
395 break;
396
397 case RAYDIUM_PATH_READY:
398 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
399 rbuf, sizeof(rbuf));
400 if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok)))
401 return 0;
402
403 break;
404
405 default:
406 dev_err(&client->dev, "%s: invalid target state %d\n",
407 __func__, state);
408 return -EINVAL;
409 }
410
411 msleep(20);
412 }
413
414 return -ETIMEDOUT;
415}
416
417static int raydium_i2c_write_object(struct i2c_client *client,
418 const void *data, size_t len,
419 enum raydium_bl_ack state)
420{
421 int error;
422
423 error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
424 if (error) {
425 dev_err(&client->dev, "WRT obj command failed: %d\n",
426 error);
427 return error;
428 }
429
430 error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, NULL, 0);
431 if (error) {
432 dev_err(&client->dev, "Ack obj command failed: %d\n", error);
433 return error;
434 }
435
436 error = raydium_i2c_bl_chk_state(client, state);
437 if (error) {
438 dev_err(&client->dev, "BL check state failed: %d\n", error);
439 return error;
440 }
441 return 0;
442}
443
444static bool raydium_i2c_boot_trigger(struct i2c_client *client)
445{
446 static const u8 cmd[7][6] = {
447 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 },
448 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
449 { 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 },
450 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
451 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 },
452 { 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 },
453 { 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 },
454 };
455 int i;
456 int error;
457
458 for (i = 0; i < 7; i++) {
459 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
460 RAYDIUM_WAIT_READY);
461 if (error) {
462 dev_err(&client->dev,
463 "boot trigger failed at step %d: %d\n",
464 i, error);
465 return error;
466 }
467 }
468
469 return 0;
470}
471
472static bool raydium_i2c_fw_trigger(struct i2c_client *client)
473{
474 static const u8 cmd[5][11] = {
475 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 },
476 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
477 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
478 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
479 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
480 };
481 int i;
482 int error;
483
484 for (i = 0; i < 5; i++) {
485 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
486 RAYDIUM_ACK_NULL);
487 if (error) {
488 dev_err(&client->dev,
489 "fw trigger failed at step %d: %d\n",
490 i, error);
491 return error;
492 }
493 }
494
495 return 0;
496}
497
498static int raydium_i2c_check_path(struct i2c_client *client)
499{
500 static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 };
501 int error;
502
503 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
504 RAYDIUM_PATH_READY);
505 if (error) {
506 dev_err(&client->dev, "check path command failed: %d\n", error);
507 return error;
508 }
509
510 return 0;
511}
512
513static int raydium_i2c_enter_bl(struct i2c_client *client)
514{
515 static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 };
516 int error;
517
518 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
519 RAYDIUM_ACK_NULL);
520 if (error) {
521 dev_err(&client->dev, "enter bl command failed: %d\n", error);
522 return error;
523 }
524
525 msleep(RM_BOOT_DELAY_MS);
526 return 0;
527}
528
529static int raydium_i2c_leave_bl(struct i2c_client *client)
530{
531 static const u8 leave_cmd[] = { 0x05, 0x00 };
532 int error;
533
534 error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd),
535 RAYDIUM_ACK_NULL);
536 if (error) {
537 dev_err(&client->dev, "leave bl command failed: %d\n", error);
538 return error;
539 }
540
541 msleep(RM_BOOT_DELAY_MS);
542 return 0;
543}
544
545static int raydium_i2c_write_checksum(struct i2c_client *client,
546 size_t length, u16 checksum)
547{
548 u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 };
549 int error;
550
551 put_unaligned_le16(length, &checksum_cmd[3]);
552 put_unaligned_le16(checksum, &checksum_cmd[5]);
553
554 error = raydium_i2c_write_object(client,
555 checksum_cmd, sizeof(checksum_cmd),
556 RAYDIUM_ACK_NULL);
557 if (error) {
558 dev_err(&client->dev, "failed to write checksum: %d\n",
559 error);
560 return error;
561 }
562
563 return 0;
564}
565
566static int raydium_i2c_disable_watch_dog(struct i2c_client *client)
567{
568 static const u8 cmd[] = { 0x0A, 0xAA };
569 int error;
570
571 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
572 RAYDIUM_WAIT_READY);
573 if (error) {
574 dev_err(&client->dev, "disable watchdog command failed: %d\n",
575 error);
576 return error;
577 }
578
579 return 0;
580}
581
582static int raydium_i2c_fw_write_page(struct i2c_client *client,
583 u16 page_idx, const void *data, size_t len)
584{
585 u8 buf[RM_BL_WRT_LEN];
586 size_t xfer_len;
587 int error;
588 int i;
589
590 BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0);
591
592 for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) {
593 buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT;
594 buf[BL_PAGE_STR] = page_idx ? 0xff : 0;
595 buf[BL_PKG_IDX] = i + 1;
596
597 xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE);
598 memcpy(&buf[BL_DATA_STR], data, xfer_len);
599 if (len < RM_BL_WRT_PKG_SIZE)
600 memset(&buf[BL_DATA_STR + xfer_len], 0xff,
601 RM_BL_WRT_PKG_SIZE - xfer_len);
602
603 error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN,
604 RAYDIUM_WAIT_READY);
605 if (error) {
606 dev_err(&client->dev,
607 "page write command failed for page %d, chunk %d: %d\n",
608 page_idx, i, error);
609 return error;
610 }
611
612 data += xfer_len;
613 len -= xfer_len;
614 }
615
616 return error;
617}
618
619static u16 raydium_calc_chksum(const u8 *buf, u16 len)
620{
621 u16 checksum = 0;
622 u16 i;
623
624 for (i = 0; i < len; i++)
625 checksum += buf[i];
626
627 return checksum;
628}
629
630static int raydium_i2c_do_update_firmware(struct raydium_data *ts,
631 const struct firmware *fw)
632{
633 struct i2c_client *client = ts->client;
634 const void *data;
635 size_t data_len;
636 size_t len;
637 int page_nr;
638 int i;
639 int error;
640 u16 fw_checksum;
641
642 if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) {
643 dev_err(&client->dev, "Invalid firmware length\n");
644 return -EINVAL;
645 }
646
647 error = raydium_i2c_check_fw_status(ts);
648 if (error) {
649 dev_err(&client->dev, "Unable to access IC %d\n", error);
650 return error;
651 }
652
653 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
654 for (i = 0; i < RM_MAX_RETRIES; i++) {
655 error = raydium_i2c_enter_bl(client);
656 if (!error) {
657 error = raydium_i2c_check_fw_status(ts);
658 if (error) {
659 dev_err(&client->dev,
660 "unable to access IC: %d\n",
661 error);
662 return error;
663 }
664
665 if (ts->boot_mode == RAYDIUM_TS_BLDR)
666 break;
667 }
668 }
669
670 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
671 dev_err(&client->dev,
672 "failed to jump to boot loader: %d\n",
673 error);
674 return -EIO;
675 }
676 }
677
678 error = raydium_i2c_disable_watch_dog(client);
679 if (error)
680 return error;
681
682 error = raydium_i2c_check_path(client);
683 if (error)
684 return error;
685
686 error = raydium_i2c_boot_trigger(client);
687 if (error) {
688 dev_err(&client->dev, "send boot trigger fail: %d\n", error);
689 return error;
690 }
691
692 msleep(RM_BOOT_DELAY_MS);
693
694 data = fw->data;
695 data_len = fw->size;
696 page_nr = 0;
697
698 while (data_len) {
699 len = min_t(size_t, data_len, RM_FW_PAGE_SIZE);
700
701 error = raydium_i2c_fw_write_page(client, page_nr++, data, len);
702 if (error)
703 return error;
704
705 msleep(20);
706
707 data += len;
708 data_len -= len;
709 }
710
711 error = raydium_i2c_leave_bl(client);
712 if (error) {
713 dev_err(&client->dev,
714 "failed to leave boot loader: %d\n", error);
715 return error;
716 }
717
718 dev_dbg(&client->dev, "left boot loader mode\n");
719 msleep(RM_BOOT_DELAY_MS);
720
721 error = raydium_i2c_check_fw_status(ts);
722 if (error) {
723 dev_err(&client->dev,
724 "failed to check fw status after write: %d\n",
725 error);
726 return error;
727 }
728
729 if (ts->boot_mode != RAYDIUM_TS_MAIN) {
730 dev_err(&client->dev,
731 "failed to switch to main fw after writing firmware: %d\n",
732 error);
733 return -EINVAL;
734 }
735
736 error = raydium_i2c_fw_trigger(client);
737 if (error) {
738 dev_err(&client->dev, "failed to trigger fw: %d\n", error);
739 return error;
740 }
741
742 fw_checksum = raydium_calc_chksum(fw->data, fw->size);
743
744 error = raydium_i2c_write_checksum(client, fw->size, fw_checksum);
745 if (error)
746 return error;
747
748 return 0;
749}
750
751static int raydium_i2c_fw_update(struct raydium_data *ts)
752{
753 struct i2c_client *client = ts->client;
754 const struct firmware *fw = NULL;
755 const char *fw_file = "raydium.fw";
756 int error;
757
758 error = request_firmware(&fw, fw_file, &client->dev);
759 if (error) {
760 dev_err(&client->dev, "Unable to open firmware %s\n", fw_file);
761 return error;
762 }
763
764 disable_irq(client->irq);
765
766 error = raydium_i2c_do_update_firmware(ts, fw);
767 if (error) {
768 dev_err(&client->dev, "firmware update failed: %d\n", error);
769 ts->boot_mode = RAYDIUM_TS_BLDR;
770 goto out_enable_irq;
771 }
772
773 error = raydium_i2c_initialize(ts);
774 if (error) {
775 dev_err(&client->dev,
776 "failed to initialize device after firmware update: %d\n",
777 error);
778 ts->boot_mode = RAYDIUM_TS_BLDR;
779 goto out_enable_irq;
780 }
781
782 ts->boot_mode = RAYDIUM_TS_MAIN;
783
784out_enable_irq:
785 enable_irq(client->irq);
786 msleep(100);
787
788 release_firmware(fw);
789
790 return error;
791}
792
793static void raydium_mt_event(struct raydium_data *ts)
794{
795 int i;
796
797 for (i = 0; i < ts->report_size / ts->contact_size; i++) {
798 u8 *contact = &ts->report_data[ts->contact_size * i];
799 bool state = contact[RM_CONTACT_STATE_POS];
800 u8 wx, wy;
801
802 input_mt_slot(ts->input, i);
803 input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state);
804
805 if (!state)
806 continue;
807
808 input_report_abs(ts->input, ABS_MT_POSITION_X,
809 get_unaligned_le16(&contact[RM_CONTACT_X_POS]));
810 input_report_abs(ts->input, ABS_MT_POSITION_Y,
811 get_unaligned_le16(&contact[RM_CONTACT_Y_POS]));
812 input_report_abs(ts->input, ABS_MT_PRESSURE,
813 contact[RM_CONTACT_PRESSURE_POS]);
814
815 wx = contact[RM_CONTACT_WIDTH_X_POS];
816 wy = contact[RM_CONTACT_WIDTH_Y_POS];
817
818 input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy));
819 input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy));
820 }
821
822 input_mt_sync_frame(ts->input);
823 input_sync(ts->input);
824}
825
826static irqreturn_t raydium_i2c_irq(int irq, void *_dev)
827{
828 struct raydium_data *ts = _dev;
829 int error;
830 u16 fw_crc;
831 u16 calc_crc;
832
833 if (ts->boot_mode != RAYDIUM_TS_MAIN)
834 goto out;
835
836 error = raydium_i2c_read_message(ts->client, ts->data_bank_addr,
837 ts->report_data, ts->pkg_size);
838 if (error)
839 goto out;
840
841 fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]);
842 calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size);
843 if (unlikely(fw_crc != calc_crc)) {
844 dev_warn(&ts->client->dev,
845 "%s: invalid packet crc %#04x vs %#04x\n",
846 __func__, calc_crc, fw_crc);
847 goto out;
848 }
849
850 raydium_mt_event(ts);
851
852out:
853 return IRQ_HANDLED;
854}
855
856static ssize_t raydium_i2c_fw_ver_show(struct device *dev,
857 struct device_attribute *attr, char *buf)
858{
859 struct i2c_client *client = to_i2c_client(dev);
860 struct raydium_data *ts = i2c_get_clientdata(client);
861
862 return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);
863}
864
865static ssize_t raydium_i2c_hw_ver_show(struct device *dev,
866 struct device_attribute *attr, char *buf)
867{
868 struct i2c_client *client = to_i2c_client(dev);
869 struct raydium_data *ts = i2c_get_clientdata(client);
870
871 return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver));
872}
873
874static ssize_t raydium_i2c_boot_mode_show(struct device *dev,
875 struct device_attribute *attr,
876 char *buf)
877{
878 struct i2c_client *client = to_i2c_client(dev);
879 struct raydium_data *ts = i2c_get_clientdata(client);
880
881 return sprintf(buf, "%s\n",
882 ts->boot_mode == RAYDIUM_TS_MAIN ?
883 "Normal" : "Recovery");
884}
885
886static ssize_t raydium_i2c_update_fw_store(struct device *dev,
887 struct device_attribute *attr,
888 const char *buf, size_t count)
889{
890 struct i2c_client *client = to_i2c_client(dev);
891 struct raydium_data *ts = i2c_get_clientdata(client);
892 int error;
893
894 error = mutex_lock_interruptible(&ts->sysfs_mutex);
895 if (error)
896 return error;
897
898 error = raydium_i2c_fw_update(ts);
899
900 mutex_unlock(&ts->sysfs_mutex);
901
902 return error ?: count;
903}
904
905static ssize_t raydium_i2c_calibrate_store(struct device *dev,
906 struct device_attribute *attr,
907 const char *buf, size_t count)
908{
909 struct i2c_client *client = to_i2c_client(dev);
910 struct raydium_data *ts = i2c_get_clientdata(client);
911 static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E };
912 int error;
913
914 error = mutex_lock_interruptible(&ts->sysfs_mutex);
915 if (error)
916 return error;
917
918 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
919 RAYDIUM_WAIT_READY);
920 if (error)
921 dev_err(&client->dev, "calibrate command failed: %d\n", error);
922
923 mutex_unlock(&ts->sysfs_mutex);
924 return error ?: count;
925}
926
927static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL);
928static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL);
929static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL);
930static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store);
931static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store);
932
933static struct attribute *raydium_i2c_attributes[] = {
934 &dev_attr_update_fw.attr,
935 &dev_attr_boot_mode.attr,
936 &dev_attr_fw_version.attr,
937 &dev_attr_hw_version.attr,
938 &dev_attr_calibrate.attr,
939 NULL
940};
941
942static struct attribute_group raydium_i2c_attribute_group = {
943 .attrs = raydium_i2c_attributes,
944};
945
946static void raydium_i2c_remove_sysfs_group(void *_data)
947{
948 struct raydium_data *ts = _data;
949
950 sysfs_remove_group(&ts->client->dev.kobj, &raydium_i2c_attribute_group);
951}
952
953static int raydium_i2c_power_on(struct raydium_data *ts)
954{
955 int error;
956
957 if (!ts->reset_gpio)
958 return 0;
959
960 gpiod_set_value_cansleep(ts->reset_gpio, 1);
961
962 error = regulator_enable(ts->avdd);
963 if (error) {
964 dev_err(&ts->client->dev,
965 "failed to enable avdd regulator: %d\n", error);
966 goto release_reset_gpio;
967 }
968
969 error = regulator_enable(ts->vccio);
970 if (error) {
971 regulator_disable(ts->avdd);
972 dev_err(&ts->client->dev,
973 "failed to enable vccio regulator: %d\n", error);
974 goto release_reset_gpio;
975 }
976
977 udelay(RM_POWERON_DELAY_USEC);
978
979release_reset_gpio:
980 gpiod_set_value_cansleep(ts->reset_gpio, 0);
981
982 if (error)
983 return error;
984
985 msleep(RM_RESET_DELAY_MSEC);
986
987 return 0;
988}
989
990static void raydium_i2c_power_off(void *_data)
991{
992 struct raydium_data *ts = _data;
993
994 if (ts->reset_gpio) {
995 gpiod_set_value_cansleep(ts->reset_gpio, 1);
996 regulator_disable(ts->vccio);
997 regulator_disable(ts->avdd);
998 }
999}
1000
1001static int raydium_i2c_probe(struct i2c_client *client,
1002 const struct i2c_device_id *id)
1003{
1004 union i2c_smbus_data dummy;
1005 struct raydium_data *ts;
1006 int error;
1007
1008 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1009 dev_err(&client->dev,
1010 "i2c check functionality error (need I2C_FUNC_I2C)\n");
1011 return -ENXIO;
1012 }
1013
1014 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
1015 if (!ts)
1016 return -ENOMEM;
1017
1018 mutex_init(&ts->sysfs_mutex);
1019
1020 ts->client = client;
1021 i2c_set_clientdata(client, ts);
1022
1023 ts->avdd = devm_regulator_get(&client->dev, "avdd");
1024 if (IS_ERR(ts->avdd)) {
1025 error = PTR_ERR(ts->avdd);
1026 if (error != -EPROBE_DEFER)
1027 dev_err(&client->dev,
1028 "Failed to get 'avdd' regulator: %d\n", error);
1029 return error;
1030 }
1031
1032 ts->vccio = devm_regulator_get(&client->dev, "vccio");
1033 if (IS_ERR(ts->vccio)) {
1034 error = PTR_ERR(ts->vccio);
1035 if (error != -EPROBE_DEFER)
1036 dev_err(&client->dev,
1037 "Failed to get 'vccio' regulator: %d\n", error);
1038 return error;
1039 }
1040
1041 ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
1042 GPIOD_OUT_LOW);
1043 if (IS_ERR(ts->reset_gpio)) {
1044 error = PTR_ERR(ts->reset_gpio);
1045 if (error != -EPROBE_DEFER)
1046 dev_err(&client->dev,
1047 "failed to get reset gpio: %d\n", error);
1048 return error;
1049 }
1050
1051 error = raydium_i2c_power_on(ts);
1052 if (error)
1053 return error;
1054
1055 error = devm_add_action(&client->dev, raydium_i2c_power_off, ts);
1056 if (error) {
1057 dev_err(&client->dev,
1058 "failed to install power off action: %d\n", error);
1059 raydium_i2c_power_off(ts);
1060 return error;
1061 }
1062
1063 /* Make sure there is something at this address */
1064 if (i2c_smbus_xfer(client->adapter, client->addr, 0,
1065 I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
1066 dev_err(&client->dev, "nothing at this address\n");
1067 return -ENXIO;
1068 }
1069
1070 error = raydium_i2c_initialize(ts);
1071 if (error) {
1072 dev_err(&client->dev, "failed to initialize: %d\n", error);
1073 return error;
1074 }
1075
1076 ts->report_data = devm_kmalloc(&client->dev,
1077 ts->pkg_size, GFP_KERNEL);
1078 if (!ts->report_data)
1079 return -ENOMEM;
1080
1081 ts->input = devm_input_allocate_device(&client->dev);
1082 if (!ts->input) {
1083 dev_err(&client->dev, "Failed to allocate input device\n");
1084 return -ENOMEM;
1085 }
1086
1087 ts->input->name = "Raydium Touchscreen";
1088 ts->input->id.bustype = BUS_I2C;
1089
1090 input_set_drvdata(ts->input, ts);
1091
1092 input_set_abs_params(ts->input, ABS_MT_POSITION_X,
1093 0, le16_to_cpu(ts->info.x_max), 0, 0);
1094 input_set_abs_params(ts->input, ABS_MT_POSITION_Y,
1095 0, le16_to_cpu(ts->info.y_max), 0, 0);
1096 input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);
1097 input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);
1098
1099 input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
1100 input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
1101
1102 error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM,
1103 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
1104 if (error) {
1105 dev_err(&client->dev,
1106 "failed to initialize MT slots: %d\n", error);
1107 return error;
1108 }
1109
1110 error = input_register_device(ts->input);
1111 if (error) {
1112 dev_err(&client->dev,
1113 "unable to register input device: %d\n", error);
1114 return error;
1115 }
1116
1117 error = devm_request_threaded_irq(&client->dev, client->irq,
1118 NULL, raydium_i2c_irq,
1119 IRQF_ONESHOT, client->name, ts);
1120 if (error) {
1121 dev_err(&client->dev, "Failed to register interrupt\n");
1122 return error;
1123 }
1124
1125 error = sysfs_create_group(&client->dev.kobj,
1126 &raydium_i2c_attribute_group);
1127 if (error) {
1128 dev_err(&client->dev, "failed to create sysfs attributes: %d\n",
1129 error);
1130 return error;
1131 }
1132
1133 error = devm_add_action(&client->dev,
1134 raydium_i2c_remove_sysfs_group, ts);
1135 if (error) {
1136 raydium_i2c_remove_sysfs_group(ts);
1137 dev_err(&client->dev,
1138 "Failed to add sysfs cleanup action: %d\n", error);
1139 return error;
1140 }
1141
1142 return 0;
1143}
1144
1145static void __maybe_unused raydium_enter_sleep(struct i2c_client *client)
1146{
1147 static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f };
1148 int error;
1149
1150 error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP,
1151 sleep_cmd, sizeof(sleep_cmd));
1152 if (error)
1153 dev_err(&client->dev,
1154 "sleep command failed: %d\n", error);
1155}
1156
1157static int __maybe_unused raydium_i2c_suspend(struct device *dev)
1158{
1159 struct i2c_client *client = to_i2c_client(dev);
1160 struct raydium_data *ts = i2c_get_clientdata(client);
1161
1162 /* Sleep is not available in BLDR recovery mode */
1163 if (ts->boot_mode != RAYDIUM_TS_MAIN)
1164 return -EBUSY;
1165
1166 disable_irq(client->irq);
1167
1168 if (device_may_wakeup(dev)) {
1169 raydium_enter_sleep(client);
1170
1171 ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0);
1172 } else {
1173 raydium_i2c_power_off(ts);
1174 }
1175
1176 return 0;
1177}
1178
1179static int __maybe_unused raydium_i2c_resume(struct device *dev)
1180{
1181 struct i2c_client *client = to_i2c_client(dev);
1182 struct raydium_data *ts = i2c_get_clientdata(client);
1183
1184 if (device_may_wakeup(dev)) {
1185 if (ts->wake_irq_enabled)
1186 disable_irq_wake(client->irq);
1187 raydium_i2c_sw_reset(client);
1188 } else {
1189 raydium_i2c_power_on(ts);
1190 raydium_i2c_initialize(ts);
1191 }
1192
1193 enable_irq(client->irq);
1194
1195 return 0;
1196}
1197
1198static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
1199 raydium_i2c_suspend, raydium_i2c_resume);
1200
1201static const struct i2c_device_id raydium_i2c_id[] = {
1202 { "raydium_i2c" , 0 },
1203 { "rm32380", 0 },
1204 { /* sentinel */ }
1205};
1206MODULE_DEVICE_TABLE(i2c, raydium_i2c_id);
1207
1208#ifdef CONFIG_ACPI
1209static const struct acpi_device_id raydium_acpi_id[] = {
1210 { "RAYD0001", 0 },
1211 { /* sentinel */ }
1212};
1213MODULE_DEVICE_TABLE(acpi, raydium_acpi_id);
1214#endif
1215
1216#ifdef CONFIG_OF
1217static const struct of_device_id raydium_of_match[] = {
1218 { .compatible = "raydium,rm32380", },
1219 { /* sentinel */ }
1220};
1221MODULE_DEVICE_TABLE(of, raydium_of_match);
1222#endif
1223
1224static struct i2c_driver raydium_i2c_driver = {
1225 .probe = raydium_i2c_probe,
1226 .id_table = raydium_i2c_id,
1227 .driver = {
1228 .name = "raydium_ts",
1229 .pm = &raydium_i2c_pm_ops,
1230 .acpi_match_table = ACPI_PTR(raydium_acpi_id),
1231 .of_match_table = of_match_ptr(raydium_of_match),
1232 },
1233};
1234module_i2c_driver(raydium_i2c_driver);
1235
1236MODULE_AUTHOR("Raydium");
1237MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");
1238MODULE_LICENSE("GPL v2");