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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / input / mouse / cyapa_gen6.c
blobc1b524ab46232eee6115cab4a8ac4491a136601f
1 /*
2 * Cypress APA trackpad with I2C interface
3 *
4 * Author: Dudley Du <dudl@cypress.com>
5 *
6 * Copyright (C) 2015 Cypress Semiconductor, Inc.
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive for
10 * more details.
11 */
12
13 #include <linux/delay.h>
14 #include <linux/i2c.h>
15 #include <linux/input.h>
16 #include <linux/input/mt.h>
17 #include <linux/mutex.h>
18 #include <linux/completion.h>
19 #include <linux/slab.h>
20 #include <asm/unaligned.h>
21 #include <linux/crc-itu-t.h>
22 #include "cyapa.h"
23
24
25 #define GEN6_ENABLE_CMD_IRQ 0x41
26 #define GEN6_DISABLE_CMD_IRQ 0x42
27 #define GEN6_ENABLE_DEV_IRQ 0x43
28 #define GEN6_DISABLE_DEV_IRQ 0x44
29
30 #define GEN6_POWER_MODE_ACTIVE 0x01
31 #define GEN6_POWER_MODE_LP_MODE1 0x02
32 #define GEN6_POWER_MODE_LP_MODE2 0x03
33 #define GEN6_POWER_MODE_BTN_ONLY 0x04
34
35 #define GEN6_SET_POWER_MODE_INTERVAL 0x47
36 #define GEN6_GET_POWER_MODE_INTERVAL 0x48
37
38 #define GEN6_MAX_RX_NUM 14
39 #define GEN6_RETRIEVE_DATA_ID_RX_ATTENURATOR_IDAC 0x00
40 #define GEN6_RETRIEVE_DATA_ID_ATTENURATOR_TRIM 0x12
41
42
43 struct pip_app_cmd_head {
44 __le16 addr;
45 __le16 length;
46 u8 report_id;
47 u8 resv; /* Reserved, must be 0 */
48 u8 cmd_code; /* bit7: resv, set to 0; bit6~0: command code.*/
49 } __packed;
50
51 struct pip_app_resp_head {
52 __le16 length;
53 u8 report_id;
54 u8 resv; /* Reserved, must be 0 */
55 u8 cmd_code; /* bit7: TGL; bit6~0: command code.*/
56 /*
57 * The value of data_status can be the first byte of data or
58 * the command status or the unsupported command code depending on the
59 * requested command code.
60 */
61 u8 data_status;
62 } __packed;
63
64 struct pip_fixed_info {
65 u8 silicon_id_high;
66 u8 silicon_id_low;
67 u8 family_id;
68 };
69
70 static u8 pip_get_bl_info[] = {
71 0x04, 0x00, 0x0B, 0x00, 0x40, 0x00, 0x01, 0x38,
72 0x00, 0x00, 0x70, 0x9E, 0x17
73 };
74
75 static bool cyapa_sort_pip_hid_descriptor_data(struct cyapa *cyapa,
76 u8 *buf, int len)
77 {
78 if (len != PIP_HID_DESCRIPTOR_SIZE)
79 return false;
80
81 if (buf[PIP_RESP_REPORT_ID_OFFSET] == PIP_HID_APP_REPORT_ID ||
82 buf[PIP_RESP_REPORT_ID_OFFSET] == PIP_HID_BL_REPORT_ID)
83 return true;
84
85 return false;
86 }
87
88 static int cyapa_get_pip_fixed_info(struct cyapa *cyapa,
89 struct pip_fixed_info *pip_info, bool is_bootloader)
90 {
91 u8 resp_data[PIP_READ_SYS_INFO_RESP_LENGTH];
92 int resp_len;
93 u16 product_family;
94 int error;
95
96 if (is_bootloader) {
97 /* Read Bootloader Information to determine Gen5 or Gen6. */
98 resp_len = sizeof(resp_data);
99 error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
100 pip_get_bl_info, sizeof(pip_get_bl_info),
101 resp_data, &resp_len,
102 2000, cyapa_sort_tsg_pip_bl_resp_data,
103 false);
104 if (error || resp_len < PIP_BL_GET_INFO_RESP_LENGTH)
105 return error ? error : -EIO;
106
107 pip_info->family_id = resp_data[8];
108 pip_info->silicon_id_low = resp_data[10];
109 pip_info->silicon_id_high = resp_data[11];
110
111 return 0;
112 }
113
114 /* Get App System Information to determine Gen5 or Gen6. */
115 resp_len = sizeof(resp_data);
116 error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
117 pip_read_sys_info, PIP_READ_SYS_INFO_CMD_LENGTH,
118 resp_data, &resp_len,
119 2000, cyapa_pip_sort_system_info_data, false);
120 if (error || resp_len < PIP_READ_SYS_INFO_RESP_LENGTH)
121 return error ? error : -EIO;
122
123 product_family = get_unaligned_le16(&resp_data[7]);
124 if ((product_family & PIP_PRODUCT_FAMILY_MASK) !=
125 PIP_PRODUCT_FAMILY_TRACKPAD)
126 return -EINVAL;
127
128 pip_info->family_id = resp_data[19];
129 pip_info->silicon_id_low = resp_data[21];
130 pip_info->silicon_id_high = resp_data[22];
131
132 return 0;
133
134 }
135
136 int cyapa_pip_state_parse(struct cyapa *cyapa, u8 *reg_data, int len)
137 {
138 u8 cmd[] = { 0x01, 0x00};
139 struct pip_fixed_info pip_info;
140 u8 resp_data[PIP_HID_DESCRIPTOR_SIZE];
141 int resp_len;
142 bool is_bootloader;
143 int error;
144
145 cyapa->state = CYAPA_STATE_NO_DEVICE;
146
147 /* Try to wake from it deep sleep state if it is. */
148 cyapa_pip_deep_sleep(cyapa, PIP_DEEP_SLEEP_STATE_ON);
149
150 /* Empty the buffer queue to get fresh data with later commands. */
151 cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL);
152
153 /*
154 * Read description info from trackpad device to determine running in
155 * APP mode or Bootloader mode.
156 */
157 resp_len = PIP_HID_DESCRIPTOR_SIZE;
158 error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
159 cmd, sizeof(cmd),
160 resp_data, &resp_len,
161 300,
162 cyapa_sort_pip_hid_descriptor_data,
163 false);
164 if (error)
165 return error;
166
167 if (resp_data[PIP_RESP_REPORT_ID_OFFSET] == PIP_HID_BL_REPORT_ID)
168 is_bootloader = true;
169 else if (resp_data[PIP_RESP_REPORT_ID_OFFSET] == PIP_HID_APP_REPORT_ID)
170 is_bootloader = false;
171 else
172 return -EAGAIN;
173
174 /* Get PIP fixed information to determine Gen5 or Gen6. */
175 memset(&pip_info, 0, sizeof(struct pip_fixed_info));
176 error = cyapa_get_pip_fixed_info(cyapa, &pip_info, is_bootloader);
177 if (error)
178 return error;
179
180 if (pip_info.family_id == 0x9B && pip_info.silicon_id_high == 0x0B) {
181 cyapa->gen = CYAPA_GEN6;
182 cyapa->state = is_bootloader ? CYAPA_STATE_GEN6_BL
183 : CYAPA_STATE_GEN6_APP;
184 } else if (pip_info.family_id == 0x91 &&
185 pip_info.silicon_id_high == 0x02) {
186 cyapa->gen = CYAPA_GEN5;
187 cyapa->state = is_bootloader ? CYAPA_STATE_GEN5_BL
188 : CYAPA_STATE_GEN5_APP;
189 }
190
191 return 0;
192 }
193
194 static int cyapa_gen6_read_sys_info(struct cyapa *cyapa)
195 {
196 u8 resp_data[PIP_READ_SYS_INFO_RESP_LENGTH];
197 int resp_len;
198 u16 product_family;
199 u8 rotat_align;
200 int error;
201
202 /* Get App System Information to determine Gen5 or Gen6. */
203 resp_len = sizeof(resp_data);
204 error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
205 pip_read_sys_info, PIP_READ_SYS_INFO_CMD_LENGTH,
206 resp_data, &resp_len,
207 2000, cyapa_pip_sort_system_info_data, false);
208 if (error || resp_len < sizeof(resp_data))
209 return error ? error : -EIO;
210
211 product_family = get_unaligned_le16(&resp_data[7]);
212 if ((product_family & PIP_PRODUCT_FAMILY_MASK) !=
213 PIP_PRODUCT_FAMILY_TRACKPAD)
214 return -EINVAL;
215
216 cyapa->platform_ver = (resp_data[67] >> PIP_BL_PLATFORM_VER_SHIFT) &
217 PIP_BL_PLATFORM_VER_MASK;
218 cyapa->fw_maj_ver = resp_data[9];
219 cyapa->fw_min_ver = resp_data[10];
220
221 cyapa->electrodes_x = resp_data[33];
222 cyapa->electrodes_y = resp_data[34];
223
224 cyapa->physical_size_x = get_unaligned_le16(&resp_data[35]) / 100;
225 cyapa->physical_size_y = get_unaligned_le16(&resp_data[37]) / 100;
226
227 cyapa->max_abs_x = get_unaligned_le16(&resp_data[39]);
228 cyapa->max_abs_y = get_unaligned_le16(&resp_data[41]);
229
230 cyapa->max_z = get_unaligned_le16(&resp_data[43]);
231
232 cyapa->x_origin = resp_data[45] & 0x01;
233 cyapa->y_origin = resp_data[46] & 0x01;
234
235 cyapa->btn_capability = (resp_data[70] << 3) & CAPABILITY_BTN_MASK;
236
237 memcpy(&cyapa->product_id[0], &resp_data[51], 5);
238 cyapa->product_id[5] = '-';
239 memcpy(&cyapa->product_id[6], &resp_data[56], 6);
240 cyapa->product_id[12] = '-';
241 memcpy(&cyapa->product_id[13], &resp_data[62], 2);
242 cyapa->product_id[15] = '\0';
243
244 /* Get the number of Rx electrodes. */
245 rotat_align = resp_data[68];
246 cyapa->electrodes_rx =
247 rotat_align ? cyapa->electrodes_y : cyapa->electrodes_x;
248 cyapa->aligned_electrodes_rx = (cyapa->electrodes_rx + 3) & ~3u;
249
250 if (!cyapa->electrodes_x || !cyapa->electrodes_y ||
251 !cyapa->physical_size_x || !cyapa->physical_size_y ||
252 !cyapa->max_abs_x || !cyapa->max_abs_y || !cyapa->max_z)
253 return -EINVAL;
254
255 return 0;
256 }
257
258 static int cyapa_gen6_bl_read_app_info(struct cyapa *cyapa)
259 {
260 u8 resp_data[PIP_BL_APP_INFO_RESP_LENGTH];
261 int resp_len;
262 int error;
263
264 resp_len = sizeof(resp_data);
265 error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
266 pip_bl_read_app_info, PIP_BL_READ_APP_INFO_CMD_LENGTH,
267 resp_data, &resp_len,
268 500, cyapa_sort_tsg_pip_bl_resp_data, false);
269 if (error || resp_len < PIP_BL_APP_INFO_RESP_LENGTH ||
270 !PIP_CMD_COMPLETE_SUCCESS(resp_data))
271 return error ? error : -EIO;
272
273 cyapa->fw_maj_ver = resp_data[8];
274 cyapa->fw_min_ver = resp_data[9];
275
276 cyapa->platform_ver = (resp_data[12] >> PIP_BL_PLATFORM_VER_SHIFT) &
277 PIP_BL_PLATFORM_VER_MASK;
278
279 memcpy(&cyapa->product_id[0], &resp_data[13], 5);
280 cyapa->product_id[5] = '-';
281 memcpy(&cyapa->product_id[6], &resp_data[18], 6);
282 cyapa->product_id[12] = '-';
283 memcpy(&cyapa->product_id[13], &resp_data[24], 2);
284 cyapa->product_id[15] = '\0';
285
286 return 0;
287
288 }
289
290 static int cyapa_gen6_config_dev_irq(struct cyapa *cyapa, u8 cmd_code)
291 {
292 u8 cmd[] = { 0x04, 0x00, 0x05, 0x00, 0x2f, 0x00, cmd_code };
293 u8 resp_data[6];
294 int resp_len;
295 int error;
296
297 resp_len = sizeof(resp_data);
298 error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, sizeof(cmd),
299 resp_data, &resp_len,
300 500, cyapa_sort_tsg_pip_app_resp_data, false);
301 if (error || !VALID_CMD_RESP_HEADER(resp_data, cmd_code) ||
302 !PIP_CMD_COMPLETE_SUCCESS(resp_data)
303 )
304 return error < 0 ? error : -EINVAL;
305
306 return 0;
307 }
308
309 static int cyapa_gen6_set_proximity(struct cyapa *cyapa, bool enable)
310 {
311 int error;
312
313 cyapa_gen6_config_dev_irq(cyapa, GEN6_DISABLE_CMD_IRQ);
314 error = cyapa_pip_set_proximity(cyapa, enable);
315 cyapa_gen6_config_dev_irq(cyapa, GEN6_ENABLE_CMD_IRQ);
316
317 return error;
318 }
319
320 static int cyapa_gen6_change_power_state(struct cyapa *cyapa, u8 power_mode)
321 {
322 u8 cmd[] = { 0x04, 0x00, 0x06, 0x00, 0x2f, 0x00, 0x46, power_mode };
323 u8 resp_data[6];
324 int resp_len;
325 int error;
326
327 resp_len = sizeof(resp_data);
328 error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, sizeof(cmd),
329 resp_data, &resp_len,
330 500, cyapa_sort_tsg_pip_app_resp_data, false);
331 if (error || !VALID_CMD_RESP_HEADER(resp_data, 0x46))
332 return error < 0 ? error : -EINVAL;
333
334 /* New power state applied in device not match the set power state. */
335 if (resp_data[5] != power_mode)
336 return -EAGAIN;
337
338 return 0;
339 }
340
341 static int cyapa_gen6_set_interval_setting(struct cyapa *cyapa,
342 struct gen6_interval_setting *interval_setting)
343 {
344 struct gen6_set_interval_cmd {
345 __le16 addr;
346 __le16 length;
347 u8 report_id;
348 u8 rsvd; /* Reserved, must be 0 */
349 u8 cmd_code;
350 __le16 active_interval;
351 __le16 lp1_interval;
352 __le16 lp2_interval;
353 } __packed set_interval_cmd;
354 u8 resp_data[11];
355 int resp_len;
356 int error;
357
358 memset(&set_interval_cmd, 0, sizeof(set_interval_cmd));
359 put_unaligned_le16(PIP_OUTPUT_REPORT_ADDR, &set_interval_cmd.addr);
360 put_unaligned_le16(sizeof(set_interval_cmd) - 2,
361 &set_interval_cmd.length);
362 set_interval_cmd.report_id = PIP_APP_CMD_REPORT_ID;
363 set_interval_cmd.cmd_code = GEN6_SET_POWER_MODE_INTERVAL;
364 put_unaligned_le16(interval_setting->active_interval,
365 &set_interval_cmd.active_interval);
366 put_unaligned_le16(interval_setting->lp1_interval,
367 &set_interval_cmd.lp1_interval);
368 put_unaligned_le16(interval_setting->lp2_interval,
369 &set_interval_cmd.lp2_interval);
370
371 resp_len = sizeof(resp_data);
372 error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
373 (u8 *)&set_interval_cmd, sizeof(set_interval_cmd),
374 resp_data, &resp_len,
375 500, cyapa_sort_tsg_pip_app_resp_data, false);
376 if (error ||
377 !VALID_CMD_RESP_HEADER(resp_data, GEN6_SET_POWER_MODE_INTERVAL))
378 return error < 0 ? error : -EINVAL;
379
380 /* Get the real set intervals from response. */
381 interval_setting->active_interval = get_unaligned_le16(&resp_data[5]);
382 interval_setting->lp1_interval = get_unaligned_le16(&resp_data[7]);
383 interval_setting->lp2_interval = get_unaligned_le16(&resp_data[9]);
384
385 return 0;
386 }
387
388 static int cyapa_gen6_get_interval_setting(struct cyapa *cyapa,
389 struct gen6_interval_setting *interval_setting)
390 {
391 u8 cmd[] = { 0x04, 0x00, 0x05, 0x00, 0x2f, 0x00,
392 GEN6_GET_POWER_MODE_INTERVAL };
393 u8 resp_data[11];
394 int resp_len;
395 int error;
396
397 resp_len = sizeof(resp_data);
398 error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, sizeof(cmd),
399 resp_data, &resp_len,
400 500, cyapa_sort_tsg_pip_app_resp_data, false);
401 if (error ||
402 !VALID_CMD_RESP_HEADER(resp_data, GEN6_GET_POWER_MODE_INTERVAL))
403 return error < 0 ? error : -EINVAL;
404
405 interval_setting->active_interval = get_unaligned_le16(&resp_data[5]);
406 interval_setting->lp1_interval = get_unaligned_le16(&resp_data[7]);
407 interval_setting->lp2_interval = get_unaligned_le16(&resp_data[9]);
408
409 return 0;
410 }
411
412 static int cyapa_gen6_deep_sleep(struct cyapa *cyapa, u8 state)
413 {
414 u8 ping[] = { 0x04, 0x00, 0x05, 0x00, 0x2f, 0x00, 0x00 };
415
416 if (state == PIP_DEEP_SLEEP_STATE_ON)
417 /*
418 * Send ping command to notify device prepare for wake up
419 * when it's in deep sleep mode. At this time, device will
420 * response nothing except an I2C NAK.
421 */
422 cyapa_i2c_pip_write(cyapa, ping, sizeof(ping));
423
424 return cyapa_pip_deep_sleep(cyapa, state);
425 }
426
427 static int cyapa_gen6_set_power_mode(struct cyapa *cyapa,
428 u8 power_mode, u16 sleep_time, enum cyapa_pm_stage pm_stage)
429 {
430 struct device *dev = &cyapa->client->dev;
431 struct gen6_interval_setting *interval_setting =
432 &cyapa->gen6_interval_setting;
433 u8 lp_mode;
434 int error;
435
436 if (cyapa->state != CYAPA_STATE_GEN6_APP)
437 return 0;
438
439 if (PIP_DEV_GET_PWR_STATE(cyapa) == UNINIT_PWR_MODE) {
440 /*
441 * Assume TP in deep sleep mode when driver is loaded,
442 * avoid driver unload and reload command IO issue caused by TP
443 * has been set into deep sleep mode when unloading.
444 */
445 PIP_DEV_SET_PWR_STATE(cyapa, PWR_MODE_OFF);
446 }
447
448 if (PIP_DEV_UNINIT_SLEEP_TIME(cyapa) &&
449 PIP_DEV_GET_PWR_STATE(cyapa) != PWR_MODE_OFF)
450 PIP_DEV_SET_SLEEP_TIME(cyapa, UNINIT_SLEEP_TIME);
451
452 if (PIP_DEV_GET_PWR_STATE(cyapa) == power_mode) {
453 if (power_mode == PWR_MODE_OFF ||
454 power_mode == PWR_MODE_FULL_ACTIVE ||
455 power_mode == PWR_MODE_BTN_ONLY ||
456 PIP_DEV_GET_SLEEP_TIME(cyapa) == sleep_time) {
457 /* Has in correct power mode state, early return. */
458 return 0;
459 }
460 }
461
462 if (power_mode == PWR_MODE_OFF) {
463 cyapa_gen6_config_dev_irq(cyapa, GEN6_DISABLE_CMD_IRQ);
464
465 error = cyapa_gen6_deep_sleep(cyapa, PIP_DEEP_SLEEP_STATE_OFF);
466 if (error) {
467 dev_err(dev, "enter deep sleep fail: %d\n", error);
468 return error;
469 }
470
471 PIP_DEV_SET_PWR_STATE(cyapa, PWR_MODE_OFF);
472 return 0;
473 }
474
475 /*
476 * When trackpad in power off mode, it cannot change to other power
477 * state directly, must be wake up from sleep firstly, then
478 * continue to do next power sate change.
479 */
480 if (PIP_DEV_GET_PWR_STATE(cyapa) == PWR_MODE_OFF) {
481 error = cyapa_gen6_deep_sleep(cyapa, PIP_DEEP_SLEEP_STATE_ON);
482 if (error) {
483 dev_err(dev, "deep sleep wake fail: %d\n", error);
484 return error;
485 }
486 }
487
488 /*
489 * Disable device assert interrupts for command response to avoid
490 * disturbing system suspending or hibernating process.
491 */
492 cyapa_gen6_config_dev_irq(cyapa, GEN6_DISABLE_CMD_IRQ);
493
494 if (power_mode == PWR_MODE_FULL_ACTIVE) {
495 error = cyapa_gen6_change_power_state(cyapa,
496 GEN6_POWER_MODE_ACTIVE);
497 if (error) {
498 dev_err(dev, "change to active fail: %d\n", error);
499 goto out;
500 }
501
502 PIP_DEV_SET_PWR_STATE(cyapa, PWR_MODE_FULL_ACTIVE);
503
504 /* Sync the interval setting from device. */
505 cyapa_gen6_get_interval_setting(cyapa, interval_setting);
506
507 } else if (power_mode == PWR_MODE_BTN_ONLY) {
508 error = cyapa_gen6_change_power_state(cyapa,
509 GEN6_POWER_MODE_BTN_ONLY);
510 if (error) {
511 dev_err(dev, "fail to button only mode: %d\n", error);
512 goto out;
513 }
514
515 PIP_DEV_SET_PWR_STATE(cyapa, PWR_MODE_BTN_ONLY);
516 } else {
517 /*
518 * Gen6 internally supports to 2 low power scan interval time,
519 * so can help to switch power mode quickly.
520 * such as runtime suspend and system suspend.
521 */
522 if (interval_setting->lp1_interval == sleep_time) {
523 lp_mode = GEN6_POWER_MODE_LP_MODE1;
524 } else if (interval_setting->lp2_interval == sleep_time) {
525 lp_mode = GEN6_POWER_MODE_LP_MODE2;
526 } else {
527 if (interval_setting->lp1_interval == 0) {
528 interval_setting->lp1_interval = sleep_time;
529 lp_mode = GEN6_POWER_MODE_LP_MODE1;
530 } else {
531 interval_setting->lp2_interval = sleep_time;
532 lp_mode = GEN6_POWER_MODE_LP_MODE2;
533 }
534 cyapa_gen6_set_interval_setting(cyapa,
535 interval_setting);
536 }
537
538 error = cyapa_gen6_change_power_state(cyapa, lp_mode);
539 if (error) {
540 dev_err(dev, "set power state to 0x%02x failed: %d\n",
541 lp_mode, error);
542 goto out;
543 }
544
545 PIP_DEV_SET_SLEEP_TIME(cyapa, sleep_time);
546 PIP_DEV_SET_PWR_STATE(cyapa,
547 cyapa_sleep_time_to_pwr_cmd(sleep_time));
548 }
549
550 out:
551 cyapa_gen6_config_dev_irq(cyapa, GEN6_ENABLE_CMD_IRQ);
552 return error;
553 }
554
555 static int cyapa_gen6_initialize(struct cyapa *cyapa)
556 {
557 return 0;
558 }
559
560 static int cyapa_pip_retrieve_data_structure(struct cyapa *cyapa,
561 u16 read_offset, u16 read_len, u8 data_id,
562 u8 *data, int *data_buf_lens)
563 {
564 struct retrieve_data_struct_cmd {
565 struct pip_app_cmd_head head;
566 __le16 read_offset;
567 __le16 read_length;
568 u8 data_id;
569 } __packed cmd;
570 u8 resp_data[GEN6_MAX_RX_NUM + 10];
571 int resp_len;
572 int error;
573
574 memset(&cmd, 0, sizeof(cmd));
575 put_unaligned_le16(PIP_OUTPUT_REPORT_ADDR, &cmd.head.addr);
576 put_unaligned_le16(sizeof(cmd), &cmd.head.length - 2);
577 cmd.head.report_id = PIP_APP_CMD_REPORT_ID;
578 cmd.head.cmd_code = PIP_RETRIEVE_DATA_STRUCTURE;
579 put_unaligned_le16(read_offset, &cmd.read_offset);
580 put_unaligned_le16(read_len, &cmd.read_length);
581 cmd.data_id = data_id;
582
583 resp_len = sizeof(resp_data);
584 error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
585 (u8 *)&cmd, sizeof(cmd),
586 resp_data, &resp_len,
587 500, cyapa_sort_tsg_pip_app_resp_data,
588 true);
589 if (error || !PIP_CMD_COMPLETE_SUCCESS(resp_data) ||
590 resp_data[6] != data_id ||
591 !VALID_CMD_RESP_HEADER(resp_data, PIP_RETRIEVE_DATA_STRUCTURE))
592 return (error < 0) ? error : -EAGAIN;
593
594 read_len = get_unaligned_le16(&resp_data[7]);
595 if (*data_buf_lens < read_len) {
596 *data_buf_lens = read_len;
597 return -ENOBUFS;
598 }
599
600 memcpy(data, &resp_data[10], read_len);
601 *data_buf_lens = read_len;
602 return 0;
603 }
604
605 static ssize_t cyapa_gen6_show_baseline(struct device *dev,
606 struct device_attribute *attr, char *buf)
607 {
608 struct cyapa *cyapa = dev_get_drvdata(dev);
609 u8 data[GEN6_MAX_RX_NUM];
610 int data_len;
611 int size = 0;
612 int i;
613 int error;
614 int resume_error;
615
616 if (!cyapa_is_pip_app_mode(cyapa))
617 return -EBUSY;
618
619 /* 1. Suspend Scanning*/
620 error = cyapa_pip_suspend_scanning(cyapa);
621 if (error)
622 return error;
623
624 /* 2. IDAC and RX Attenuator Calibration Data (Center Frequency). */
625 data_len = sizeof(data);
626 error = cyapa_pip_retrieve_data_structure(cyapa, 0, data_len,
627 GEN6_RETRIEVE_DATA_ID_RX_ATTENURATOR_IDAC,
628 data, &data_len);
629 if (error)
630 goto resume_scanning;
631
632 size = scnprintf(buf, PAGE_SIZE, "%d %d %d %d %d %d ",
633 data[0], /* RX Attenuator Mutual */
634 data[1], /* IDAC Mutual */
635 data[2], /* RX Attenuator Self RX */
636 data[3], /* IDAC Self RX */
637 data[4], /* RX Attenuator Self TX */
638 data[5] /* IDAC Self TX */
639 );
640
641 /* 3. Read Attenuator Trim. */
642 data_len = sizeof(data);
643 error = cyapa_pip_retrieve_data_structure(cyapa, 0, data_len,
644 GEN6_RETRIEVE_DATA_ID_ATTENURATOR_TRIM,
645 data, &data_len);
646 if (error)
647 goto resume_scanning;
648
649 /* set attenuator trim values. */
650 for (i = 0; i < data_len; i++)
651 size += scnprintf(buf + size, PAGE_SIZE - size, "%d ", data[i]);
652 size += scnprintf(buf + size, PAGE_SIZE - size, "\n");
653
654 resume_scanning:
655 /* 4. Resume Scanning*/
656 resume_error = cyapa_pip_resume_scanning(cyapa);
657 if (resume_error || error) {
658 memset(buf, 0, PAGE_SIZE);
659 return resume_error ? resume_error : error;
660 }
661
662 return size;
663 }
664
665 static int cyapa_gen6_operational_check(struct cyapa *cyapa)
666 {
667 struct device *dev = &cyapa->client->dev;
668 int error;
669
670 if (cyapa->gen != CYAPA_GEN6)
671 return -ENODEV;
672
673 switch (cyapa->state) {
674 case CYAPA_STATE_GEN6_BL:
675 error = cyapa_pip_bl_exit(cyapa);
676 if (error) {
677 /* Try to update trackpad product information. */
678 cyapa_gen6_bl_read_app_info(cyapa);
679 goto out;
680 }
681
682 cyapa->state = CYAPA_STATE_GEN6_APP;
683 /* fall through */
684
685 case CYAPA_STATE_GEN6_APP:
686 /*
687 * If trackpad device in deep sleep mode,
688 * the app command will fail.
689 * So always try to reset trackpad device to full active when
690 * the device state is required.
691 */
692 error = cyapa_gen6_set_power_mode(cyapa,
693 PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE);
694 if (error)
695 dev_warn(dev, "%s: failed to set power active mode.\n",
696 __func__);
697
698 /* By default, the trackpad proximity function is enabled. */
699 error = cyapa_pip_set_proximity(cyapa, true);
700 if (error)
701 dev_warn(dev, "%s: failed to enable proximity.\n",
702 __func__);
703
704 /* Get trackpad product information. */
705 error = cyapa_gen6_read_sys_info(cyapa);
706 if (error)
707 goto out;
708 /* Only support product ID starting with CYTRA */
709 if (memcmp(cyapa->product_id, product_id,
710 strlen(product_id)) != 0) {
711 dev_err(dev, "%s: unknown product ID (%s)\n",
712 __func__, cyapa->product_id);
713 error = -EINVAL;
714 }
715 break;
716 default:
717 error = -EINVAL;
718 }
719
720 out:
721 return error;
722 }
723
724 const struct cyapa_dev_ops cyapa_gen6_ops = {
725 .check_fw = cyapa_pip_check_fw,
726 .bl_enter = cyapa_pip_bl_enter,
727 .bl_initiate = cyapa_pip_bl_initiate,
728 .update_fw = cyapa_pip_do_fw_update,
729 .bl_activate = cyapa_pip_bl_activate,
730 .bl_deactivate = cyapa_pip_bl_deactivate,
731
732 .show_baseline = cyapa_gen6_show_baseline,
733 .calibrate_store = cyapa_pip_do_calibrate,
734
735 .initialize = cyapa_gen6_initialize,
736
737 .state_parse = cyapa_pip_state_parse,
738 .operational_check = cyapa_gen6_operational_check,
739
740 .irq_handler = cyapa_pip_irq_handler,
741 .irq_cmd_handler = cyapa_pip_irq_cmd_handler,
742 .sort_empty_output_data = cyapa_empty_pip_output_data,
743 .set_power_mode = cyapa_gen6_set_power_mode,
744
745 .set_proximity = cyapa_gen6_set_proximity,
746 };
Linux with added FPC-III support