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6696777c DL |
1 | /* |
2 | * Elan I2C/SMBus Touchpad driver - I2C interface | |
3 | * | |
4 | * Copyright (c) 2013 ELAN Microelectronics Corp. | |
5 | * | |
6 | * Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw> | |
6696777c DL |
7 | * |
8 | * Based on cyapa driver: | |
9 | * copyright (c) 2011-2012 Cypress Semiconductor, Inc. | |
10 | * copyright (c) 2011-2012 Google, Inc. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License version 2 as published | |
14 | * by the Free Software Foundation. | |
15 | * | |
16 | * Trademarks are the property of their respective owners. | |
17 | */ | |
18 | ||
19 | #include <linux/completion.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/i2c.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/sched.h> | |
26 | #include <asm/unaligned.h> | |
27 | ||
28 | #include "elan_i2c.h" | |
29 | ||
30 | /* Elan i2c commands */ | |
31 | #define ETP_I2C_RESET 0x0100 | |
32 | #define ETP_I2C_WAKE_UP 0x0800 | |
33 | #define ETP_I2C_SLEEP 0x0801 | |
34 | #define ETP_I2C_DESC_CMD 0x0001 | |
35 | #define ETP_I2C_REPORT_DESC_CMD 0x0002 | |
36 | #define ETP_I2C_STAND_CMD 0x0005 | |
37 | #define ETP_I2C_UNIQUEID_CMD 0x0101 | |
38 | #define ETP_I2C_FW_VERSION_CMD 0x0102 | |
39 | #define ETP_I2C_SM_VERSION_CMD 0x0103 | |
40 | #define ETP_I2C_XY_TRACENUM_CMD 0x0105 | |
41 | #define ETP_I2C_MAX_X_AXIS_CMD 0x0106 | |
42 | #define ETP_I2C_MAX_Y_AXIS_CMD 0x0107 | |
43 | #define ETP_I2C_RESOLUTION_CMD 0x0108 | |
b9bced0e | 44 | #define ETP_I2C_PRESSURE_CMD 0x010A |
6696777c DL |
45 | #define ETP_I2C_IAP_VERSION_CMD 0x0110 |
46 | #define ETP_I2C_SET_CMD 0x0300 | |
47 | #define ETP_I2C_POWER_CMD 0x0307 | |
48 | #define ETP_I2C_FW_CHECKSUM_CMD 0x030F | |
49 | #define ETP_I2C_IAP_CTRL_CMD 0x0310 | |
50 | #define ETP_I2C_IAP_CMD 0x0311 | |
51 | #define ETP_I2C_IAP_RESET_CMD 0x0314 | |
52 | #define ETP_I2C_IAP_CHECKSUM_CMD 0x0315 | |
53 | #define ETP_I2C_CALIBRATE_CMD 0x0316 | |
54 | #define ETP_I2C_MAX_BASELINE_CMD 0x0317 | |
55 | #define ETP_I2C_MIN_BASELINE_CMD 0x0318 | |
56 | ||
57 | #define ETP_I2C_REPORT_LEN 34 | |
58 | #define ETP_I2C_DESC_LENGTH 30 | |
59 | #define ETP_I2C_REPORT_DESC_LENGTH 158 | |
60 | #define ETP_I2C_INF_LENGTH 2 | |
61 | #define ETP_I2C_IAP_PASSWORD 0x1EA5 | |
62 | #define ETP_I2C_IAP_RESET 0xF0F0 | |
63 | #define ETP_I2C_MAIN_MODE_ON (1 << 9) | |
64 | #define ETP_I2C_IAP_REG_L 0x01 | |
65 | #define ETP_I2C_IAP_REG_H 0x06 | |
66 | ||
67 | static int elan_i2c_read_block(struct i2c_client *client, | |
68 | u16 reg, u8 *val, u16 len) | |
69 | { | |
70 | __le16 buf[] = { | |
71 | cpu_to_le16(reg), | |
72 | }; | |
73 | struct i2c_msg msgs[] = { | |
74 | { | |
75 | .addr = client->addr, | |
76 | .flags = client->flags & I2C_M_TEN, | |
77 | .len = sizeof(buf), | |
78 | .buf = (u8 *)buf, | |
79 | }, | |
80 | { | |
81 | .addr = client->addr, | |
82 | .flags = (client->flags & I2C_M_TEN) | I2C_M_RD, | |
83 | .len = len, | |
84 | .buf = val, | |
85 | } | |
86 | }; | |
87 | int ret; | |
88 | ||
89 | ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); | |
90 | return ret == ARRAY_SIZE(msgs) ? 0 : (ret < 0 ? ret : -EIO); | |
91 | } | |
92 | ||
93 | static int elan_i2c_read_cmd(struct i2c_client *client, u16 reg, u8 *val) | |
94 | { | |
95 | int retval; | |
96 | ||
97 | retval = elan_i2c_read_block(client, reg, val, ETP_I2C_INF_LENGTH); | |
98 | if (retval < 0) { | |
99 | dev_err(&client->dev, "reading cmd (0x%04x) fail.\n", reg); | |
100 | return retval; | |
101 | } | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | static int elan_i2c_write_cmd(struct i2c_client *client, u16 reg, u16 cmd) | |
107 | { | |
108 | __le16 buf[] = { | |
109 | cpu_to_le16(reg), | |
110 | cpu_to_le16(cmd), | |
111 | }; | |
112 | struct i2c_msg msg = { | |
113 | .addr = client->addr, | |
114 | .flags = client->flags & I2C_M_TEN, | |
115 | .len = sizeof(buf), | |
116 | .buf = (u8 *)buf, | |
117 | }; | |
118 | int ret; | |
119 | ||
120 | ret = i2c_transfer(client->adapter, &msg, 1); | |
b3beed7f DL |
121 | if (ret != 1) { |
122 | if (ret >= 0) | |
123 | ret = -EIO; | |
124 | dev_err(&client->dev, "writing cmd (0x%04x) failed: %d\n", | |
125 | reg, ret); | |
126 | return ret; | |
127 | } | |
128 | ||
129 | return 0; | |
6696777c DL |
130 | } |
131 | ||
132 | static int elan_i2c_initialize(struct i2c_client *client) | |
133 | { | |
134 | struct device *dev = &client->dev; | |
135 | int error; | |
136 | u8 val[256]; | |
137 | ||
138 | error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET); | |
139 | if (error) { | |
140 | dev_err(dev, "device reset failed: %d\n", error); | |
141 | return error; | |
142 | } | |
143 | ||
144 | /* Wait for the device to reset */ | |
145 | msleep(100); | |
146 | ||
147 | /* get reset acknowledgement 0000 */ | |
148 | error = i2c_master_recv(client, val, ETP_I2C_INF_LENGTH); | |
149 | if (error < 0) { | |
150 | dev_err(dev, "failed to read reset response: %d\n", error); | |
151 | return error; | |
152 | } | |
153 | ||
154 | error = elan_i2c_read_block(client, ETP_I2C_DESC_CMD, | |
155 | val, ETP_I2C_DESC_LENGTH); | |
156 | if (error) { | |
157 | dev_err(dev, "cannot get device descriptor: %d\n", error); | |
158 | return error; | |
159 | } | |
160 | ||
161 | error = elan_i2c_read_block(client, ETP_I2C_REPORT_DESC_CMD, | |
162 | val, ETP_I2C_REPORT_DESC_LENGTH); | |
163 | if (error) { | |
164 | dev_err(dev, "fetching report descriptor failed.: %d\n", error); | |
165 | return error; | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int elan_i2c_sleep_control(struct i2c_client *client, bool sleep) | |
172 | { | |
173 | return elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, | |
174 | sleep ? ETP_I2C_SLEEP : ETP_I2C_WAKE_UP); | |
175 | } | |
176 | ||
177 | static int elan_i2c_power_control(struct i2c_client *client, bool enable) | |
178 | { | |
179 | u8 val[2]; | |
180 | u16 reg; | |
181 | int error; | |
182 | ||
183 | error = elan_i2c_read_cmd(client, ETP_I2C_POWER_CMD, val); | |
184 | if (error) { | |
185 | dev_err(&client->dev, | |
186 | "failed to read current power state: %d\n", | |
187 | error); | |
188 | return error; | |
189 | } | |
190 | ||
191 | reg = le16_to_cpup((__le16 *)val); | |
192 | if (enable) | |
193 | reg &= ~ETP_DISABLE_POWER; | |
194 | else | |
195 | reg |= ETP_DISABLE_POWER; | |
196 | ||
197 | error = elan_i2c_write_cmd(client, ETP_I2C_POWER_CMD, reg); | |
198 | if (error) { | |
199 | dev_err(&client->dev, | |
200 | "failed to write current power state: %d\n", | |
201 | error); | |
202 | return error; | |
203 | } | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static int elan_i2c_set_mode(struct i2c_client *client, u8 mode) | |
209 | { | |
210 | return elan_i2c_write_cmd(client, ETP_I2C_SET_CMD, mode); | |
211 | } | |
212 | ||
213 | ||
214 | static int elan_i2c_calibrate(struct i2c_client *client) | |
215 | { | |
216 | return elan_i2c_write_cmd(client, ETP_I2C_CALIBRATE_CMD, 1); | |
217 | } | |
218 | ||
219 | static int elan_i2c_calibrate_result(struct i2c_client *client, u8 *val) | |
220 | { | |
221 | return elan_i2c_read_block(client, ETP_I2C_CALIBRATE_CMD, val, 1); | |
222 | } | |
223 | ||
224 | static int elan_i2c_get_baseline_data(struct i2c_client *client, | |
225 | bool max_baseline, u8 *value) | |
226 | { | |
227 | int error; | |
228 | u8 val[3]; | |
229 | ||
230 | error = elan_i2c_read_cmd(client, | |
231 | max_baseline ? ETP_I2C_MAX_BASELINE_CMD : | |
232 | ETP_I2C_MIN_BASELINE_CMD, | |
233 | val); | |
234 | if (error) | |
235 | return error; | |
236 | ||
237 | *value = le16_to_cpup((__le16 *)val); | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | static int elan_i2c_get_version(struct i2c_client *client, | |
243 | bool iap, u8 *version) | |
244 | { | |
245 | int error; | |
246 | u8 val[3]; | |
247 | ||
248 | error = elan_i2c_read_cmd(client, | |
249 | iap ? ETP_I2C_IAP_VERSION_CMD : | |
250 | ETP_I2C_FW_VERSION_CMD, | |
251 | val); | |
252 | if (error) { | |
253 | dev_err(&client->dev, "failed to get %s version: %d\n", | |
254 | iap ? "IAP" : "FW", error); | |
255 | return error; | |
256 | } | |
257 | ||
258 | *version = val[0]; | |
259 | return 0; | |
260 | } | |
261 | ||
12018ac3 DL |
262 | static int elan_i2c_get_sm_version(struct i2c_client *client, |
263 | u8 *ic_type, u8 *version) | |
6696777c DL |
264 | { |
265 | int error; | |
266 | u8 val[3]; | |
267 | ||
268 | error = elan_i2c_read_cmd(client, ETP_I2C_SM_VERSION_CMD, val); | |
269 | if (error) { | |
270 | dev_err(&client->dev, "failed to get SM version: %d\n", error); | |
271 | return error; | |
272 | } | |
273 | ||
274 | *version = val[0]; | |
12018ac3 | 275 | *ic_type = val[1]; |
6696777c DL |
276 | return 0; |
277 | } | |
278 | ||
ed75a14e | 279 | static int elan_i2c_get_product_id(struct i2c_client *client, u16 *id) |
6696777c DL |
280 | { |
281 | int error; | |
282 | u8 val[3]; | |
283 | ||
284 | error = elan_i2c_read_cmd(client, ETP_I2C_UNIQUEID_CMD, val); | |
285 | if (error) { | |
286 | dev_err(&client->dev, "failed to get product ID: %d\n", error); | |
287 | return error; | |
288 | } | |
289 | ||
ed75a14e | 290 | *id = le16_to_cpup((__le16 *)val); |
6696777c DL |
291 | return 0; |
292 | } | |
293 | ||
294 | static int elan_i2c_get_checksum(struct i2c_client *client, | |
295 | bool iap, u16 *csum) | |
296 | { | |
297 | int error; | |
298 | u8 val[3]; | |
299 | ||
300 | error = elan_i2c_read_cmd(client, | |
301 | iap ? ETP_I2C_IAP_CHECKSUM_CMD : | |
302 | ETP_I2C_FW_CHECKSUM_CMD, | |
303 | val); | |
304 | if (error) { | |
305 | dev_err(&client->dev, "failed to get %s checksum: %d\n", | |
306 | iap ? "IAP" : "FW", error); | |
307 | return error; | |
308 | } | |
309 | ||
310 | *csum = le16_to_cpup((__le16 *)val); | |
311 | return 0; | |
312 | } | |
313 | ||
314 | static int elan_i2c_get_max(struct i2c_client *client, | |
315 | unsigned int *max_x, unsigned int *max_y) | |
316 | { | |
317 | int error; | |
318 | u8 val[3]; | |
319 | ||
320 | error = elan_i2c_read_cmd(client, ETP_I2C_MAX_X_AXIS_CMD, val); | |
321 | if (error) { | |
322 | dev_err(&client->dev, "failed to get X dimension: %d\n", error); | |
323 | return error; | |
324 | } | |
325 | ||
326 | *max_x = le16_to_cpup((__le16 *)val) & 0x0fff; | |
327 | ||
328 | error = elan_i2c_read_cmd(client, ETP_I2C_MAX_Y_AXIS_CMD, val); | |
329 | if (error) { | |
330 | dev_err(&client->dev, "failed to get Y dimension: %d\n", error); | |
331 | return error; | |
332 | } | |
333 | ||
334 | *max_y = le16_to_cpup((__le16 *)val) & 0x0fff; | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static int elan_i2c_get_resolution(struct i2c_client *client, | |
340 | u8 *hw_res_x, u8 *hw_res_y) | |
341 | { | |
342 | int error; | |
343 | u8 val[3]; | |
344 | ||
345 | error = elan_i2c_read_cmd(client, ETP_I2C_RESOLUTION_CMD, val); | |
346 | if (error) { | |
347 | dev_err(&client->dev, "failed to get resolution: %d\n", error); | |
348 | return error; | |
349 | } | |
350 | ||
351 | *hw_res_x = val[0]; | |
352 | *hw_res_y = val[1]; | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
357 | static int elan_i2c_get_num_traces(struct i2c_client *client, | |
358 | unsigned int *x_traces, | |
359 | unsigned int *y_traces) | |
360 | { | |
361 | int error; | |
362 | u8 val[3]; | |
363 | ||
364 | error = elan_i2c_read_cmd(client, ETP_I2C_XY_TRACENUM_CMD, val); | |
365 | if (error) { | |
366 | dev_err(&client->dev, "failed to get trace info: %d\n", error); | |
367 | return error; | |
368 | } | |
369 | ||
9f423801 DL |
370 | *x_traces = val[0]; |
371 | *y_traces = val[1]; | |
6696777c DL |
372 | |
373 | return 0; | |
374 | } | |
375 | ||
b9bced0e | 376 | static int elan_i2c_get_pressure_adjustment(struct i2c_client *client, |
377 | int *adjustment) | |
378 | { | |
379 | int error; | |
380 | u8 val[3]; | |
381 | ||
382 | error = elan_i2c_read_cmd(client, ETP_I2C_PRESSURE_CMD, val); | |
383 | if (error) { | |
384 | dev_err(&client->dev, "failed to get pressure format: %d\n", | |
385 | error); | |
386 | return error; | |
387 | } | |
388 | ||
389 | if ((val[0] >> 4) & 0x1) | |
390 | *adjustment = 0; | |
391 | else | |
392 | *adjustment = ETP_PRESSURE_OFFSET; | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
6696777c DL |
397 | static int elan_i2c_iap_get_mode(struct i2c_client *client, enum tp_mode *mode) |
398 | { | |
399 | int error; | |
400 | u16 constant; | |
401 | u8 val[3]; | |
402 | ||
403 | error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val); | |
404 | if (error) { | |
405 | dev_err(&client->dev, | |
406 | "failed to read iap control register: %d\n", | |
407 | error); | |
408 | return error; | |
409 | } | |
410 | ||
411 | constant = le16_to_cpup((__le16 *)val); | |
412 | dev_dbg(&client->dev, "iap control reg: 0x%04x.\n", constant); | |
413 | ||
414 | *mode = (constant & ETP_I2C_MAIN_MODE_ON) ? MAIN_MODE : IAP_MODE; | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | static int elan_i2c_iap_reset(struct i2c_client *client) | |
420 | { | |
421 | int error; | |
422 | ||
423 | error = elan_i2c_write_cmd(client, ETP_I2C_IAP_RESET_CMD, | |
424 | ETP_I2C_IAP_RESET); | |
425 | if (error) { | |
426 | dev_err(&client->dev, "cannot reset IC: %d\n", error); | |
427 | return error; | |
428 | } | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
433 | static int elan_i2c_set_flash_key(struct i2c_client *client) | |
434 | { | |
435 | int error; | |
436 | ||
437 | error = elan_i2c_write_cmd(client, ETP_I2C_IAP_CMD, | |
438 | ETP_I2C_IAP_PASSWORD); | |
439 | if (error) { | |
440 | dev_err(&client->dev, "cannot set flash key: %d\n", error); | |
441 | return error; | |
442 | } | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | static int elan_i2c_prepare_fw_update(struct i2c_client *client) | |
448 | { | |
449 | struct device *dev = &client->dev; | |
450 | int error; | |
451 | enum tp_mode mode; | |
452 | u8 val[3]; | |
453 | u16 password; | |
454 | ||
455 | /* Get FW in which mode (IAP_MODE/MAIN_MODE) */ | |
456 | error = elan_i2c_iap_get_mode(client, &mode); | |
457 | if (error) | |
458 | return error; | |
459 | ||
460 | if (mode == IAP_MODE) { | |
461 | /* Reset IC */ | |
462 | error = elan_i2c_iap_reset(client); | |
463 | if (error) | |
464 | return error; | |
465 | ||
466 | msleep(30); | |
467 | } | |
468 | ||
469 | /* Set flash key*/ | |
470 | error = elan_i2c_set_flash_key(client); | |
471 | if (error) | |
472 | return error; | |
473 | ||
474 | /* Wait for F/W IAP initialization */ | |
475 | msleep(mode == MAIN_MODE ? 100 : 30); | |
476 | ||
477 | /* Check if we are in IAP mode or not */ | |
478 | error = elan_i2c_iap_get_mode(client, &mode); | |
479 | if (error) | |
480 | return error; | |
481 | ||
482 | if (mode == MAIN_MODE) { | |
483 | dev_err(dev, "wrong mode: %d\n", mode); | |
484 | return -EIO; | |
485 | } | |
486 | ||
487 | /* Set flash key again */ | |
488 | error = elan_i2c_set_flash_key(client); | |
489 | if (error) | |
490 | return error; | |
491 | ||
492 | /* Wait for F/W IAP initialization */ | |
493 | msleep(30); | |
494 | ||
495 | /* read back to check we actually enabled successfully. */ | |
496 | error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CMD, val); | |
497 | if (error) { | |
498 | dev_err(dev, "cannot read iap password: %d\n", | |
499 | error); | |
500 | return error; | |
501 | } | |
502 | ||
503 | password = le16_to_cpup((__le16 *)val); | |
504 | if (password != ETP_I2C_IAP_PASSWORD) { | |
505 | dev_err(dev, "wrong iap password: 0x%X\n", password); | |
506 | return -EIO; | |
507 | } | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | static int elan_i2c_write_fw_block(struct i2c_client *client, | |
513 | const u8 *page, u16 checksum, int idx) | |
514 | { | |
515 | struct device *dev = &client->dev; | |
516 | u8 page_store[ETP_FW_PAGE_SIZE + 4]; | |
517 | u8 val[3]; | |
518 | u16 result; | |
519 | int ret, error; | |
520 | ||
521 | page_store[0] = ETP_I2C_IAP_REG_L; | |
522 | page_store[1] = ETP_I2C_IAP_REG_H; | |
523 | memcpy(&page_store[2], page, ETP_FW_PAGE_SIZE); | |
524 | /* recode checksum at last two bytes */ | |
525 | put_unaligned_le16(checksum, &page_store[ETP_FW_PAGE_SIZE + 2]); | |
526 | ||
527 | ret = i2c_master_send(client, page_store, sizeof(page_store)); | |
528 | if (ret != sizeof(page_store)) { | |
529 | error = ret < 0 ? ret : -EIO; | |
530 | dev_err(dev, "Failed to write page %d: %d\n", idx, error); | |
531 | return error; | |
532 | } | |
533 | ||
534 | /* Wait for F/W to update one page ROM data. */ | |
535 | msleep(20); | |
536 | ||
537 | error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val); | |
538 | if (error) { | |
539 | dev_err(dev, "Failed to read IAP write result: %d\n", error); | |
540 | return error; | |
541 | } | |
542 | ||
543 | result = le16_to_cpup((__le16 *)val); | |
544 | if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) { | |
545 | dev_err(dev, "IAP reports failed write: %04hx\n", | |
546 | result); | |
547 | return -EIO; | |
548 | } | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | static int elan_i2c_finish_fw_update(struct i2c_client *client, | |
554 | struct completion *completion) | |
555 | { | |
556 | struct device *dev = &client->dev; | |
557 | long ret; | |
558 | int error; | |
559 | int len; | |
560 | u8 buffer[ETP_I2C_INF_LENGTH]; | |
561 | ||
562 | reinit_completion(completion); | |
563 | enable_irq(client->irq); | |
564 | ||
565 | error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET); | |
566 | if (!error) | |
567 | ret = wait_for_completion_interruptible_timeout(completion, | |
568 | msecs_to_jiffies(300)); | |
569 | disable_irq(client->irq); | |
570 | ||
571 | if (error) { | |
572 | dev_err(dev, "device reset failed: %d\n", error); | |
573 | return error; | |
574 | } else if (ret == 0) { | |
575 | dev_err(dev, "timeout waiting for device reset\n"); | |
576 | return -ETIMEDOUT; | |
577 | } else if (ret < 0) { | |
578 | error = ret; | |
579 | dev_err(dev, "error waiting for device reset: %d\n", error); | |
580 | return error; | |
581 | } | |
582 | ||
583 | len = i2c_master_recv(client, buffer, ETP_I2C_INF_LENGTH); | |
584 | if (len != ETP_I2C_INF_LENGTH) { | |
585 | error = len < 0 ? len : -EIO; | |
586 | dev_err(dev, "failed to read INT signal: %d (%d)\n", | |
587 | error, len); | |
588 | return error; | |
589 | } | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | static int elan_i2c_get_report(struct i2c_client *client, u8 *report) | |
595 | { | |
596 | int len; | |
597 | ||
598 | len = i2c_master_recv(client, report, ETP_I2C_REPORT_LEN); | |
599 | if (len < 0) { | |
600 | dev_err(&client->dev, "failed to read report data: %d\n", len); | |
601 | return len; | |
602 | } | |
603 | ||
604 | if (len != ETP_I2C_REPORT_LEN) { | |
605 | dev_err(&client->dev, | |
606 | "wrong report length (%d vs %d expected)\n", | |
607 | len, ETP_I2C_REPORT_LEN); | |
608 | return -EIO; | |
609 | } | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
614 | const struct elan_transport_ops elan_i2c_ops = { | |
615 | .initialize = elan_i2c_initialize, | |
616 | .sleep_control = elan_i2c_sleep_control, | |
617 | .power_control = elan_i2c_power_control, | |
618 | .set_mode = elan_i2c_set_mode, | |
619 | ||
620 | .calibrate = elan_i2c_calibrate, | |
621 | .calibrate_result = elan_i2c_calibrate_result, | |
622 | ||
623 | .get_baseline_data = elan_i2c_get_baseline_data, | |
624 | ||
625 | .get_version = elan_i2c_get_version, | |
626 | .get_sm_version = elan_i2c_get_sm_version, | |
627 | .get_product_id = elan_i2c_get_product_id, | |
628 | .get_checksum = elan_i2c_get_checksum, | |
b9bced0e | 629 | .get_pressure_adjustment = elan_i2c_get_pressure_adjustment, |
6696777c DL |
630 | |
631 | .get_max = elan_i2c_get_max, | |
632 | .get_resolution = elan_i2c_get_resolution, | |
633 | .get_num_traces = elan_i2c_get_num_traces, | |
634 | ||
635 | .iap_get_mode = elan_i2c_iap_get_mode, | |
636 | .iap_reset = elan_i2c_iap_reset, | |
637 | ||
638 | .prepare_fw_update = elan_i2c_prepare_fw_update, | |
639 | .write_fw_block = elan_i2c_write_fw_block, | |
640 | .finish_fw_update = elan_i2c_finish_fw_update, | |
641 | ||
642 | .get_report = elan_i2c_get_report, | |
643 | }; |