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48a2b783 JL |
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 | |
e66475eb | 59 | #define RM_PACKET_CRC_SIZE 2 |
48a2b783 JL |
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 | ||
85 | enum raydium_bl_cmd { | |
86 | BL_HEADER = 0, | |
87 | BL_PAGE_STR, | |
88 | BL_PKG_IDX, | |
89 | BL_DATA_STR, | |
90 | }; | |
91 | ||
92 | enum raydium_bl_ack { | |
93 | RAYDIUM_ACK_NULL = 0, | |
94 | RAYDIUM_WAIT_READY, | |
95 | RAYDIUM_PATH_READY, | |
96 | }; | |
97 | ||
98 | enum raydium_boot_mode { | |
99 | RAYDIUM_TS_MAIN = 0, | |
100 | RAYDIUM_TS_BLDR, | |
101 | }; | |
102 | ||
103 | /* Response to RM_CMD_DATA_BANK request */ | |
104 | struct raydium_data_info { | |
105 | __le32 data_bank_addr; | |
106 | u8 pkg_size; | |
107 | u8 tp_info_size; | |
108 | }; | |
109 | ||
110 | struct 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 */ | |
124 | struct 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; | |
e66475eb | 141 | u8 pkg_size; |
48a2b783 JL |
142 | |
143 | enum raydium_boot_mode boot_mode; | |
144 | ||
145 | bool wake_irq_enabled; | |
146 | }; | |
147 | ||
148 | static 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 | ||
182 | static 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 | ||
207 | static 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 | ||
235 | static 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 | ||
249 | static 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 | ||
266 | static 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 | */ | |
e66475eb | 285 | if (ts->report_data && ts->pkg_size != data_info.pkg_size) { |
48a2b783 JL |
286 | dev_warn(&client->dev, |
287 | "report size changes, was: %d, new: %d\n", | |
e66475eb JL |
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 | } | |
48a2b783 JL |
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 | ||
320 | static 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 | ||
340 | static 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 | ||
376 | static 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 | ||
417 | static 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 | ||
444 | static 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 | ||
6cad4e26 | 469 | return false; |
48a2b783 JL |
470 | } |
471 | ||
472 | static 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 | ||
6cad4e26 | 495 | return false; |
48a2b783 JL |
496 | } |
497 | ||
498 | static 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 | ||
513 | static 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 | ||
529 | static 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 | ||
545 | static 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 | ||
566 | static 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 | ||
582 | static 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 | ||
e66475eb JL |
619 | static 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 | ||
48a2b783 JL |
630 | static 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, | |
fac96cc9 | 672 | "failed to jump to boot loader: %d\n", |
48a2b783 JL |
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 | ||
e66475eb | 742 | fw_checksum = raydium_calc_chksum(fw->data, fw->size); |
48a2b783 JL |
743 | |
744 | error = raydium_i2c_write_checksum(client, fw->size, fw_checksum); | |
745 | if (error) | |
746 | return error; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
751 | static int raydium_i2c_fw_update(struct raydium_data *ts) | |
752 | { | |
753 | struct i2c_client *client = ts->client; | |
754 | const struct firmware *fw = NULL; | |
92a37438 | 755 | char *fw_file; |
48a2b783 JL |
756 | int error; |
757 | ||
92a37438 JL |
758 | fw_file = kasprintf(GFP_KERNEL, "raydium_%#04x.fw", |
759 | le32_to_cpu(ts->info.hw_ver)); | |
760 | if (!fw_file) | |
761 | return -ENOMEM; | |
762 | ||
763 | dev_dbg(&client->dev, "firmware name: %s\n", fw_file); | |
764 | ||
48a2b783 JL |
765 | error = request_firmware(&fw, fw_file, &client->dev); |
766 | if (error) { | |
767 | dev_err(&client->dev, "Unable to open firmware %s\n", fw_file); | |
92a37438 | 768 | goto out_free_fw_file; |
48a2b783 JL |
769 | } |
770 | ||
771 | disable_irq(client->irq); | |
772 | ||
773 | error = raydium_i2c_do_update_firmware(ts, fw); | |
774 | if (error) { | |
775 | dev_err(&client->dev, "firmware update failed: %d\n", error); | |
776 | ts->boot_mode = RAYDIUM_TS_BLDR; | |
777 | goto out_enable_irq; | |
778 | } | |
779 | ||
780 | error = raydium_i2c_initialize(ts); | |
781 | if (error) { | |
782 | dev_err(&client->dev, | |
783 | "failed to initialize device after firmware update: %d\n", | |
784 | error); | |
785 | ts->boot_mode = RAYDIUM_TS_BLDR; | |
786 | goto out_enable_irq; | |
787 | } | |
788 | ||
789 | ts->boot_mode = RAYDIUM_TS_MAIN; | |
790 | ||
791 | out_enable_irq: | |
792 | enable_irq(client->irq); | |
793 | msleep(100); | |
794 | ||
795 | release_firmware(fw); | |
796 | ||
92a37438 JL |
797 | out_free_fw_file: |
798 | kfree(fw_file); | |
799 | ||
48a2b783 JL |
800 | return error; |
801 | } | |
802 | ||
803 | static void raydium_mt_event(struct raydium_data *ts) | |
804 | { | |
805 | int i; | |
48a2b783 JL |
806 | |
807 | for (i = 0; i < ts->report_size / ts->contact_size; i++) { | |
808 | u8 *contact = &ts->report_data[ts->contact_size * i]; | |
809 | bool state = contact[RM_CONTACT_STATE_POS]; | |
810 | u8 wx, wy; | |
811 | ||
812 | input_mt_slot(ts->input, i); | |
813 | input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state); | |
814 | ||
815 | if (!state) | |
816 | continue; | |
817 | ||
818 | input_report_abs(ts->input, ABS_MT_POSITION_X, | |
819 | get_unaligned_le16(&contact[RM_CONTACT_X_POS])); | |
820 | input_report_abs(ts->input, ABS_MT_POSITION_Y, | |
821 | get_unaligned_le16(&contact[RM_CONTACT_Y_POS])); | |
822 | input_report_abs(ts->input, ABS_MT_PRESSURE, | |
823 | contact[RM_CONTACT_PRESSURE_POS]); | |
824 | ||
825 | wx = contact[RM_CONTACT_WIDTH_X_POS]; | |
826 | wy = contact[RM_CONTACT_WIDTH_Y_POS]; | |
827 | ||
828 | input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy)); | |
829 | input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy)); | |
830 | } | |
831 | ||
832 | input_mt_sync_frame(ts->input); | |
833 | input_sync(ts->input); | |
834 | } | |
835 | ||
836 | static irqreturn_t raydium_i2c_irq(int irq, void *_dev) | |
837 | { | |
838 | struct raydium_data *ts = _dev; | |
e66475eb JL |
839 | int error; |
840 | u16 fw_crc; | |
841 | u16 calc_crc; | |
842 | ||
843 | if (ts->boot_mode != RAYDIUM_TS_MAIN) | |
844 | goto out; | |
845 | ||
846 | error = raydium_i2c_read_message(ts->client, ts->data_bank_addr, | |
847 | ts->report_data, ts->pkg_size); | |
848 | if (error) | |
849 | goto out; | |
850 | ||
851 | fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]); | |
852 | calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size); | |
853 | if (unlikely(fw_crc != calc_crc)) { | |
854 | dev_warn(&ts->client->dev, | |
855 | "%s: invalid packet crc %#04x vs %#04x\n", | |
856 | __func__, calc_crc, fw_crc); | |
857 | goto out; | |
858 | } | |
48a2b783 | 859 | |
e66475eb | 860 | raydium_mt_event(ts); |
48a2b783 | 861 | |
e66475eb | 862 | out: |
48a2b783 JL |
863 | return IRQ_HANDLED; |
864 | } | |
865 | ||
866 | static ssize_t raydium_i2c_fw_ver_show(struct device *dev, | |
867 | struct device_attribute *attr, char *buf) | |
868 | { | |
869 | struct i2c_client *client = to_i2c_client(dev); | |
870 | struct raydium_data *ts = i2c_get_clientdata(client); | |
871 | ||
872 | return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver); | |
873 | } | |
874 | ||
875 | static ssize_t raydium_i2c_hw_ver_show(struct device *dev, | |
876 | struct device_attribute *attr, 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, "%#04x\n", le32_to_cpu(ts->info.hw_ver)); | |
882 | } | |
883 | ||
884 | static ssize_t raydium_i2c_boot_mode_show(struct device *dev, | |
885 | struct device_attribute *attr, | |
886 | char *buf) | |
887 | { | |
888 | struct i2c_client *client = to_i2c_client(dev); | |
889 | struct raydium_data *ts = i2c_get_clientdata(client); | |
890 | ||
891 | return sprintf(buf, "%s\n", | |
892 | ts->boot_mode == RAYDIUM_TS_MAIN ? | |
893 | "Normal" : "Recovery"); | |
894 | } | |
895 | ||
896 | static ssize_t raydium_i2c_update_fw_store(struct device *dev, | |
897 | struct device_attribute *attr, | |
898 | const char *buf, size_t count) | |
899 | { | |
900 | struct i2c_client *client = to_i2c_client(dev); | |
901 | struct raydium_data *ts = i2c_get_clientdata(client); | |
902 | int error; | |
903 | ||
904 | error = mutex_lock_interruptible(&ts->sysfs_mutex); | |
905 | if (error) | |
906 | return error; | |
907 | ||
908 | error = raydium_i2c_fw_update(ts); | |
909 | ||
910 | mutex_unlock(&ts->sysfs_mutex); | |
911 | ||
912 | return error ?: count; | |
913 | } | |
914 | ||
915 | static ssize_t raydium_i2c_calibrate_store(struct device *dev, | |
916 | struct device_attribute *attr, | |
917 | const char *buf, size_t count) | |
918 | { | |
919 | struct i2c_client *client = to_i2c_client(dev); | |
920 | struct raydium_data *ts = i2c_get_clientdata(client); | |
921 | static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E }; | |
922 | int error; | |
923 | ||
924 | error = mutex_lock_interruptible(&ts->sysfs_mutex); | |
925 | if (error) | |
926 | return error; | |
927 | ||
928 | error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd), | |
929 | RAYDIUM_WAIT_READY); | |
930 | if (error) | |
931 | dev_err(&client->dev, "calibrate command failed: %d\n", error); | |
932 | ||
933 | mutex_unlock(&ts->sysfs_mutex); | |
934 | return error ?: count; | |
935 | } | |
936 | ||
937 | static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL); | |
938 | static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL); | |
939 | static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL); | |
940 | static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store); | |
941 | static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store); | |
942 | ||
943 | static struct attribute *raydium_i2c_attributes[] = { | |
944 | &dev_attr_update_fw.attr, | |
945 | &dev_attr_boot_mode.attr, | |
946 | &dev_attr_fw_version.attr, | |
947 | &dev_attr_hw_version.attr, | |
948 | &dev_attr_calibrate.attr, | |
949 | NULL | |
950 | }; | |
951 | ||
d653386d | 952 | static const struct attribute_group raydium_i2c_attribute_group = { |
48a2b783 JL |
953 | .attrs = raydium_i2c_attributes, |
954 | }; | |
955 | ||
48a2b783 JL |
956 | static int raydium_i2c_power_on(struct raydium_data *ts) |
957 | { | |
958 | int error; | |
959 | ||
cd467299 | 960 | if (!ts->reset_gpio) |
48a2b783 JL |
961 | return 0; |
962 | ||
963 | gpiod_set_value_cansleep(ts->reset_gpio, 1); | |
964 | ||
965 | error = regulator_enable(ts->avdd); | |
966 | if (error) { | |
967 | dev_err(&ts->client->dev, | |
968 | "failed to enable avdd regulator: %d\n", error); | |
969 | goto release_reset_gpio; | |
970 | } | |
971 | ||
972 | error = regulator_enable(ts->vccio); | |
973 | if (error) { | |
974 | regulator_disable(ts->avdd); | |
975 | dev_err(&ts->client->dev, | |
976 | "failed to enable vccio regulator: %d\n", error); | |
977 | goto release_reset_gpio; | |
978 | } | |
979 | ||
980 | udelay(RM_POWERON_DELAY_USEC); | |
981 | ||
982 | release_reset_gpio: | |
983 | gpiod_set_value_cansleep(ts->reset_gpio, 0); | |
984 | ||
985 | if (error) | |
986 | return error; | |
987 | ||
988 | msleep(RM_RESET_DELAY_MSEC); | |
989 | ||
990 | return 0; | |
991 | } | |
992 | ||
993 | static void raydium_i2c_power_off(void *_data) | |
994 | { | |
995 | struct raydium_data *ts = _data; | |
996 | ||
cd467299 | 997 | if (ts->reset_gpio) { |
48a2b783 JL |
998 | gpiod_set_value_cansleep(ts->reset_gpio, 1); |
999 | regulator_disable(ts->vccio); | |
1000 | regulator_disable(ts->avdd); | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | static int raydium_i2c_probe(struct i2c_client *client, | |
1005 | const struct i2c_device_id *id) | |
1006 | { | |
1007 | union i2c_smbus_data dummy; | |
1008 | struct raydium_data *ts; | |
1009 | int error; | |
1010 | ||
1011 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { | |
1012 | dev_err(&client->dev, | |
1013 | "i2c check functionality error (need I2C_FUNC_I2C)\n"); | |
1014 | return -ENXIO; | |
1015 | } | |
1016 | ||
1017 | ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); | |
1018 | if (!ts) | |
1019 | return -ENOMEM; | |
1020 | ||
1021 | mutex_init(&ts->sysfs_mutex); | |
1022 | ||
1023 | ts->client = client; | |
1024 | i2c_set_clientdata(client, ts); | |
1025 | ||
1026 | ts->avdd = devm_regulator_get(&client->dev, "avdd"); | |
1027 | if (IS_ERR(ts->avdd)) { | |
1028 | error = PTR_ERR(ts->avdd); | |
1029 | if (error != -EPROBE_DEFER) | |
1030 | dev_err(&client->dev, | |
1031 | "Failed to get 'avdd' regulator: %d\n", error); | |
1032 | return error; | |
1033 | } | |
1034 | ||
1035 | ts->vccio = devm_regulator_get(&client->dev, "vccio"); | |
1036 | if (IS_ERR(ts->vccio)) { | |
1037 | error = PTR_ERR(ts->vccio); | |
1038 | if (error != -EPROBE_DEFER) | |
1039 | dev_err(&client->dev, | |
1040 | "Failed to get 'vccio' regulator: %d\n", error); | |
1041 | return error; | |
1042 | } | |
1043 | ||
1044 | ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", | |
1045 | GPIOD_OUT_LOW); | |
1046 | if (IS_ERR(ts->reset_gpio)) { | |
1047 | error = PTR_ERR(ts->reset_gpio); | |
cd467299 | 1048 | if (error != -EPROBE_DEFER) |
48a2b783 JL |
1049 | dev_err(&client->dev, |
1050 | "failed to get reset gpio: %d\n", error); | |
cd467299 | 1051 | return error; |
48a2b783 JL |
1052 | } |
1053 | ||
1054 | error = raydium_i2c_power_on(ts); | |
1055 | if (error) | |
1056 | return error; | |
1057 | ||
1058 | error = devm_add_action(&client->dev, raydium_i2c_power_off, ts); | |
1059 | if (error) { | |
1060 | dev_err(&client->dev, | |
1061 | "failed to install power off action: %d\n", error); | |
1062 | raydium_i2c_power_off(ts); | |
1063 | return error; | |
1064 | } | |
1065 | ||
1066 | /* Make sure there is something at this address */ | |
1067 | if (i2c_smbus_xfer(client->adapter, client->addr, 0, | |
1068 | I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) { | |
1069 | dev_err(&client->dev, "nothing at this address\n"); | |
1070 | return -ENXIO; | |
1071 | } | |
1072 | ||
1073 | error = raydium_i2c_initialize(ts); | |
1074 | if (error) { | |
1075 | dev_err(&client->dev, "failed to initialize: %d\n", error); | |
1076 | return error; | |
1077 | } | |
1078 | ||
1079 | ts->report_data = devm_kmalloc(&client->dev, | |
e66475eb | 1080 | ts->pkg_size, GFP_KERNEL); |
48a2b783 JL |
1081 | if (!ts->report_data) |
1082 | return -ENOMEM; | |
1083 | ||
1084 | ts->input = devm_input_allocate_device(&client->dev); | |
1085 | if (!ts->input) { | |
1086 | dev_err(&client->dev, "Failed to allocate input device\n"); | |
1087 | return -ENOMEM; | |
1088 | } | |
1089 | ||
1090 | ts->input->name = "Raydium Touchscreen"; | |
1091 | ts->input->id.bustype = BUS_I2C; | |
1092 | ||
48a2b783 JL |
1093 | input_set_abs_params(ts->input, ABS_MT_POSITION_X, |
1094 | 0, le16_to_cpu(ts->info.x_max), 0, 0); | |
1095 | input_set_abs_params(ts->input, ABS_MT_POSITION_Y, | |
1096 | 0, le16_to_cpu(ts->info.y_max), 0, 0); | |
1097 | input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res); | |
1098 | input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res); | |
1099 | ||
1100 | input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); | |
1101 | input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0); | |
1102 | ||
1103 | error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM, | |
1104 | INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); | |
1105 | if (error) { | |
1106 | dev_err(&client->dev, | |
1107 | "failed to initialize MT slots: %d\n", error); | |
1108 | return error; | |
1109 | } | |
1110 | ||
1111 | error = input_register_device(ts->input); | |
1112 | if (error) { | |
1113 | dev_err(&client->dev, | |
1114 | "unable to register input device: %d\n", error); | |
1115 | return error; | |
1116 | } | |
1117 | ||
1118 | error = devm_request_threaded_irq(&client->dev, client->irq, | |
1119 | NULL, raydium_i2c_irq, | |
1120 | IRQF_ONESHOT, client->name, ts); | |
1121 | if (error) { | |
1122 | dev_err(&client->dev, "Failed to register interrupt\n"); | |
1123 | return error; | |
1124 | } | |
1125 | ||
b887df52 | 1126 | error = devm_device_add_group(&client->dev, |
48a2b783 JL |
1127 | &raydium_i2c_attribute_group); |
1128 | if (error) { | |
1129 | dev_err(&client->dev, "failed to create sysfs attributes: %d\n", | |
1130 | error); | |
1131 | return error; | |
1132 | } | |
1133 | ||
48a2b783 JL |
1134 | return 0; |
1135 | } | |
1136 | ||
1137 | static void __maybe_unused raydium_enter_sleep(struct i2c_client *client) | |
1138 | { | |
1139 | static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f }; | |
1140 | int error; | |
1141 | ||
1142 | error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP, | |
1143 | sleep_cmd, sizeof(sleep_cmd)); | |
1144 | if (error) | |
1145 | dev_err(&client->dev, | |
1146 | "sleep command failed: %d\n", error); | |
1147 | } | |
1148 | ||
1149 | static int __maybe_unused raydium_i2c_suspend(struct device *dev) | |
1150 | { | |
1151 | struct i2c_client *client = to_i2c_client(dev); | |
1152 | struct raydium_data *ts = i2c_get_clientdata(client); | |
1153 | ||
1154 | /* Sleep is not available in BLDR recovery mode */ | |
1155 | if (ts->boot_mode != RAYDIUM_TS_MAIN) | |
cd467299 | 1156 | return -EBUSY; |
48a2b783 JL |
1157 | |
1158 | disable_irq(client->irq); | |
1159 | ||
1160 | if (device_may_wakeup(dev)) { | |
1161 | raydium_enter_sleep(client); | |
1162 | ||
1163 | ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0); | |
1164 | } else { | |
1165 | raydium_i2c_power_off(ts); | |
1166 | } | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | static int __maybe_unused raydium_i2c_resume(struct device *dev) | |
1172 | { | |
1173 | struct i2c_client *client = to_i2c_client(dev); | |
1174 | struct raydium_data *ts = i2c_get_clientdata(client); | |
1175 | ||
1176 | if (device_may_wakeup(dev)) { | |
1177 | if (ts->wake_irq_enabled) | |
1178 | disable_irq_wake(client->irq); | |
1179 | raydium_i2c_sw_reset(client); | |
1180 | } else { | |
1181 | raydium_i2c_power_on(ts); | |
1182 | raydium_i2c_initialize(ts); | |
1183 | } | |
1184 | ||
1185 | enable_irq(client->irq); | |
1186 | ||
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops, | |
1191 | raydium_i2c_suspend, raydium_i2c_resume); | |
1192 | ||
1193 | static const struct i2c_device_id raydium_i2c_id[] = { | |
1194 | { "raydium_i2c" , 0 }, | |
1195 | { "rm32380", 0 }, | |
1196 | { /* sentinel */ } | |
1197 | }; | |
1198 | MODULE_DEVICE_TABLE(i2c, raydium_i2c_id); | |
1199 | ||
1200 | #ifdef CONFIG_ACPI | |
1201 | static const struct acpi_device_id raydium_acpi_id[] = { | |
1202 | { "RAYD0001", 0 }, | |
1203 | { /* sentinel */ } | |
1204 | }; | |
1205 | MODULE_DEVICE_TABLE(acpi, raydium_acpi_id); | |
1206 | #endif | |
1207 | ||
1208 | #ifdef CONFIG_OF | |
1209 | static const struct of_device_id raydium_of_match[] = { | |
1210 | { .compatible = "raydium,rm32380", }, | |
1211 | { /* sentinel */ } | |
1212 | }; | |
1213 | MODULE_DEVICE_TABLE(of, raydium_of_match); | |
1214 | #endif | |
1215 | ||
1216 | static struct i2c_driver raydium_i2c_driver = { | |
1217 | .probe = raydium_i2c_probe, | |
1218 | .id_table = raydium_i2c_id, | |
1219 | .driver = { | |
1220 | .name = "raydium_ts", | |
1221 | .pm = &raydium_i2c_pm_ops, | |
1222 | .acpi_match_table = ACPI_PTR(raydium_acpi_id), | |
1223 | .of_match_table = of_match_ptr(raydium_of_match), | |
1224 | }, | |
1225 | }; | |
1226 | module_i2c_driver(raydium_i2c_driver); | |
1227 | ||
1228 | MODULE_AUTHOR("Raydium"); | |
1229 | MODULE_DESCRIPTION("Raydium I2c Touchscreen driver"); | |
1230 | MODULE_LICENSE("GPL v2"); |