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ac1dc6b2 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
66aee900 SL |
2 | /* |
3 | * Elan Microelectronics touch panels with I2C interface | |
4 | * | |
5 | * Copyright (C) 2014 Elan Microelectronics Corporation. | |
6 | * Scott Liu <scott.liu@emc.com.tw> | |
7 | * | |
8 | * This code is partly based on hid-multitouch.c: | |
9 | * | |
10 | * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr> | |
11 | * Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> | |
12 | * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France | |
13 | * | |
66aee900 SL |
14 | * This code is partly based on i2c-hid.c: |
15 | * | |
16 | * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> | |
17 | * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France | |
18 | * Copyright (c) 2012 Red Hat, Inc | |
19 | */ | |
20 | ||
66aee900 | 21 | |
f27ad893 | 22 | #include <linux/bits.h> |
66aee900 SL |
23 | #include <linux/module.h> |
24 | #include <linux/input.h> | |
25 | #include <linux/interrupt.h> | |
4c83c071 | 26 | #include <linux/irq.h> |
66aee900 SL |
27 | #include <linux/platform_device.h> |
28 | #include <linux/async.h> | |
29 | #include <linux/i2c.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/uaccess.h> | |
32 | #include <linux/buffer_head.h> | |
66aee900 SL |
33 | #include <linux/slab.h> |
34 | #include <linux/firmware.h> | |
66aee900 | 35 | #include <linux/input/mt.h> |
68334dba | 36 | #include <linux/input/touchscreen.h> |
66aee900 SL |
37 | #include <linux/acpi.h> |
38 | #include <linux/of.h> | |
afe10358 DT |
39 | #include <linux/gpio/consumer.h> |
40 | #include <linux/regulator/consumer.h> | |
65299e8b | 41 | #include <linux/uuid.h> |
66aee900 SL |
42 | #include <asm/unaligned.h> |
43 | ||
44 | /* Device, Driver information */ | |
45 | #define DEVICE_NAME "elants_i2c" | |
66aee900 SL |
46 | |
47 | /* Convert from rows or columns into resolution */ | |
48 | #define ELAN_TS_RESOLUTION(n, m) (((n) - 1) * (m)) | |
49 | ||
50 | /* FW header data */ | |
51 | #define HEADER_SIZE 4 | |
52 | #define FW_HDR_TYPE 0 | |
53 | #define FW_HDR_COUNT 1 | |
54 | #define FW_HDR_LENGTH 2 | |
55 | ||
56 | /* Buffer mode Queue Header information */ | |
57 | #define QUEUE_HEADER_SINGLE 0x62 | |
58 | #define QUEUE_HEADER_NORMAL 0X63 | |
59 | #define QUEUE_HEADER_WAIT 0x64 | |
9517b95b | 60 | #define QUEUE_HEADER_NORMAL2 0x66 |
66aee900 SL |
61 | |
62 | /* Command header definition */ | |
63 | #define CMD_HEADER_WRITE 0x54 | |
64 | #define CMD_HEADER_READ 0x53 | |
65 | #define CMD_HEADER_6B_READ 0x5B | |
f0b57e19 | 66 | #define CMD_HEADER_ROM_READ 0x96 |
66aee900 SL |
67 | #define CMD_HEADER_RESP 0x52 |
68 | #define CMD_HEADER_6B_RESP 0x9B | |
f0b57e19 | 69 | #define CMD_HEADER_ROM_RESP 0x95 |
66aee900 SL |
70 | #define CMD_HEADER_HELLO 0x55 |
71 | #define CMD_HEADER_REK 0x66 | |
72 | ||
73 | /* FW position data */ | |
9517b95b | 74 | #define PACKET_SIZE_OLD 40 |
66aee900 SL |
75 | #define PACKET_SIZE 55 |
76 | #define MAX_CONTACT_NUM 10 | |
77 | #define FW_POS_HEADER 0 | |
78 | #define FW_POS_STATE 1 | |
79 | #define FW_POS_TOTAL 2 | |
80 | #define FW_POS_XY 3 | |
f27ad893 | 81 | #define FW_POS_TOOL_TYPE 33 |
66aee900 SL |
82 | #define FW_POS_CHECKSUM 34 |
83 | #define FW_POS_WIDTH 35 | |
84 | #define FW_POS_PRESSURE 45 | |
85 | ||
86 | #define HEADER_REPORT_10_FINGER 0x62 | |
87 | ||
c18b443c | 88 | /* Header (4 bytes) plus 3 full 10-finger packets */ |
66aee900 SL |
89 | #define MAX_PACKET_SIZE 169 |
90 | ||
91 | #define BOOT_TIME_DELAY_MS 50 | |
92 | ||
93 | /* FW read command, 0x53 0x?? 0x0, 0x01 */ | |
94 | #define E_ELAN_INFO_FW_VER 0x00 | |
95 | #define E_ELAN_INFO_BC_VER 0x10 | |
9517b95b MM |
96 | #define E_ELAN_INFO_X_RES 0x60 |
97 | #define E_ELAN_INFO_Y_RES 0x63 | |
93f63406 | 98 | #define E_ELAN_INFO_REK 0xD0 |
66aee900 SL |
99 | #define E_ELAN_INFO_TEST_VER 0xE0 |
100 | #define E_ELAN_INFO_FW_ID 0xF0 | |
101 | #define E_INFO_OSR 0xD6 | |
102 | #define E_INFO_PHY_SCAN 0xD7 | |
103 | #define E_INFO_PHY_DRIVER 0xD8 | |
104 | ||
c18b443c MM |
105 | /* FW write command, 0x54 0x?? 0x0, 0x01 */ |
106 | #define E_POWER_STATE_SLEEP 0x50 | |
107 | #define E_POWER_STATE_RESUME 0x58 | |
108 | ||
66aee900 SL |
109 | #define MAX_RETRIES 3 |
110 | #define MAX_FW_UPDATE_RETRIES 30 | |
111 | ||
112 | #define ELAN_FW_PAGESIZE 132 | |
66aee900 SL |
113 | |
114 | /* calibration timeout definition */ | |
22c15e5e | 115 | #define ELAN_CALI_TIMEOUT_MSEC 12000 |
66aee900 | 116 | |
afe10358 DT |
117 | #define ELAN_POWERON_DELAY_USEC 500 |
118 | #define ELAN_RESET_DELAY_MSEC 20 | |
119 | ||
b2b2318a JC |
120 | /* FW boot code version */ |
121 | #define BC_VER_H_BYTE_FOR_EKTH3900x1_I2C 0x72 | |
122 | #define BC_VER_H_BYTE_FOR_EKTH3900x2_I2C 0x82 | |
123 | #define BC_VER_H_BYTE_FOR_EKTH3900x3_I2C 0x92 | |
124 | #define BC_VER_H_BYTE_FOR_EKTH5312x1_I2C 0x6D | |
125 | #define BC_VER_H_BYTE_FOR_EKTH5312x2_I2C 0x6E | |
126 | #define BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C 0x77 | |
127 | #define BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C 0x78 | |
128 | #define BC_VER_H_BYTE_FOR_EKTH5312x1_I2C_USB 0x67 | |
129 | #define BC_VER_H_BYTE_FOR_EKTH5312x2_I2C_USB 0x68 | |
130 | #define BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C_USB 0x74 | |
131 | #define BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C_USB 0x75 | |
132 | ||
9517b95b MM |
133 | enum elants_chip_id { |
134 | EKTH3500, | |
135 | EKTF3624, | |
136 | }; | |
137 | ||
66aee900 SL |
138 | enum elants_state { |
139 | ELAN_STATE_NORMAL, | |
140 | ELAN_WAIT_QUEUE_HEADER, | |
141 | ELAN_WAIT_RECALIBRATION, | |
142 | }; | |
143 | ||
144 | enum elants_iap_mode { | |
145 | ELAN_IAP_OPERATIONAL, | |
146 | ELAN_IAP_RECOVERY, | |
147 | }; | |
148 | ||
149 | /* struct elants_data - represents state of Elan touchscreen device */ | |
150 | struct elants_data { | |
151 | struct i2c_client *client; | |
152 | struct input_dev *input; | |
153 | ||
afe10358 DT |
154 | struct regulator *vcc33; |
155 | struct regulator *vccio; | |
156 | struct gpio_desc *reset_gpio; | |
157 | ||
66aee900 SL |
158 | u16 fw_version; |
159 | u8 test_version; | |
160 | u8 solution_version; | |
161 | u8 bc_version; | |
162 | u8 iap_version; | |
163 | u16 hw_version; | |
4238e52c | 164 | u8 major_res; |
66aee900 SL |
165 | unsigned int x_res; /* resolution in units/mm */ |
166 | unsigned int y_res; | |
167 | unsigned int x_max; | |
168 | unsigned int y_max; | |
9517b95b MM |
169 | unsigned int phy_x; |
170 | unsigned int phy_y; | |
68334dba | 171 | struct touchscreen_properties prop; |
66aee900 SL |
172 | |
173 | enum elants_state state; | |
9517b95b | 174 | enum elants_chip_id chip_id; |
66aee900 SL |
175 | enum elants_iap_mode iap_mode; |
176 | ||
177 | /* Guards against concurrent access to the device via sysfs */ | |
178 | struct mutex sysfs_mutex; | |
179 | ||
180 | u8 cmd_resp[HEADER_SIZE]; | |
181 | struct completion cmd_done; | |
182 | ||
66aee900 | 183 | bool wake_irq_enabled; |
afe10358 | 184 | bool keep_power_in_suspend; |
00f73f97 SB |
185 | |
186 | /* Must be last to be used for DMA operations */ | |
187 | u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned; | |
66aee900 SL |
188 | }; |
189 | ||
190 | static int elants_i2c_send(struct i2c_client *client, | |
191 | const void *data, size_t size) | |
192 | { | |
193 | int ret; | |
194 | ||
195 | ret = i2c_master_send(client, data, size); | |
196 | if (ret == size) | |
197 | return 0; | |
198 | ||
199 | if (ret >= 0) | |
200 | ret = -EIO; | |
201 | ||
202 | dev_err(&client->dev, "%s failed (%*ph): %d\n", | |
203 | __func__, (int)size, data, ret); | |
204 | ||
205 | return ret; | |
206 | } | |
207 | ||
208 | static int elants_i2c_read(struct i2c_client *client, void *data, size_t size) | |
209 | { | |
210 | int ret; | |
211 | ||
212 | ret = i2c_master_recv(client, data, size); | |
213 | if (ret == size) | |
214 | return 0; | |
215 | ||
216 | if (ret >= 0) | |
217 | ret = -EIO; | |
218 | ||
219 | dev_err(&client->dev, "%s failed: %d\n", __func__, ret); | |
220 | ||
221 | return ret; | |
222 | } | |
223 | ||
224 | static int elants_i2c_execute_command(struct i2c_client *client, | |
225 | const u8 *cmd, size_t cmd_size, | |
918e2844 MM |
226 | u8 *resp, size_t resp_size, |
227 | int retries, const char *cmd_name) | |
66aee900 SL |
228 | { |
229 | struct i2c_msg msgs[2]; | |
230 | int ret; | |
231 | u8 expected_response; | |
232 | ||
233 | switch (cmd[0]) { | |
234 | case CMD_HEADER_READ: | |
235 | expected_response = CMD_HEADER_RESP; | |
236 | break; | |
237 | ||
238 | case CMD_HEADER_6B_READ: | |
239 | expected_response = CMD_HEADER_6B_RESP; | |
240 | break; | |
241 | ||
f0b57e19 JC |
242 | case CMD_HEADER_ROM_READ: |
243 | expected_response = CMD_HEADER_ROM_RESP; | |
244 | break; | |
245 | ||
66aee900 | 246 | default: |
918e2844 MM |
247 | dev_err(&client->dev, "(%s): invalid command: %*ph\n", |
248 | cmd_name, (int)cmd_size, cmd); | |
66aee900 SL |
249 | return -EINVAL; |
250 | } | |
251 | ||
918e2844 MM |
252 | for (;;) { |
253 | msgs[0].addr = client->addr; | |
254 | msgs[0].flags = client->flags & I2C_M_TEN; | |
255 | msgs[0].len = cmd_size; | |
256 | msgs[0].buf = (u8 *)cmd; | |
257 | ||
258 | msgs[1].addr = client->addr; | |
259 | msgs[1].flags = (client->flags & I2C_M_TEN) | I2C_M_RD; | |
260 | msgs[1].flags |= I2C_M_RD; | |
261 | msgs[1].len = resp_size; | |
262 | msgs[1].buf = resp; | |
263 | ||
264 | ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); | |
265 | if (ret < 0) { | |
266 | if (--retries > 0) { | |
267 | dev_dbg(&client->dev, | |
268 | "(%s) I2C transfer failed: %pe (retrying)\n", | |
269 | cmd_name, ERR_PTR(ret)); | |
270 | continue; | |
271 | } | |
66aee900 | 272 | |
918e2844 MM |
273 | dev_err(&client->dev, |
274 | "(%s) I2C transfer failed: %pe\n", | |
275 | cmd_name, ERR_PTR(ret)); | |
276 | return ret; | |
277 | } | |
66aee900 | 278 | |
918e2844 MM |
279 | if (ret != ARRAY_SIZE(msgs) || |
280 | resp[FW_HDR_TYPE] != expected_response) { | |
281 | if (--retries > 0) { | |
282 | dev_dbg(&client->dev, | |
283 | "(%s) unexpected response: %*ph (retrying)\n", | |
284 | cmd_name, ret, resp); | |
285 | continue; | |
286 | } | |
66aee900 | 287 | |
918e2844 MM |
288 | dev_err(&client->dev, |
289 | "(%s) unexpected response: %*ph\n", | |
290 | cmd_name, ret, resp); | |
291 | return -EIO; | |
292 | } | |
66aee900 | 293 | |
918e2844 MM |
294 | return 0; |
295 | } | |
66aee900 SL |
296 | } |
297 | ||
298 | static int elants_i2c_calibrate(struct elants_data *ts) | |
299 | { | |
300 | struct i2c_client *client = ts->client; | |
301 | int ret, error; | |
c18b443c MM |
302 | static const u8 w_flashkey[] = { CMD_HEADER_WRITE, 0xC0, 0xE1, 0x5A }; |
303 | static const u8 rek[] = { CMD_HEADER_WRITE, 0x29, 0x00, 0x01 }; | |
66aee900 SL |
304 | static const u8 rek_resp[] = { CMD_HEADER_REK, 0x66, 0x66, 0x66 }; |
305 | ||
306 | disable_irq(client->irq); | |
307 | ||
308 | ts->state = ELAN_WAIT_RECALIBRATION; | |
309 | reinit_completion(&ts->cmd_done); | |
310 | ||
311 | elants_i2c_send(client, w_flashkey, sizeof(w_flashkey)); | |
312 | elants_i2c_send(client, rek, sizeof(rek)); | |
313 | ||
314 | enable_irq(client->irq); | |
315 | ||
316 | ret = wait_for_completion_interruptible_timeout(&ts->cmd_done, | |
317 | msecs_to_jiffies(ELAN_CALI_TIMEOUT_MSEC)); | |
318 | ||
319 | ts->state = ELAN_STATE_NORMAL; | |
320 | ||
321 | if (ret <= 0) { | |
322 | error = ret < 0 ? ret : -ETIMEDOUT; | |
323 | dev_err(&client->dev, | |
324 | "error while waiting for calibration to complete: %d\n", | |
325 | error); | |
326 | return error; | |
327 | } | |
328 | ||
329 | if (memcmp(rek_resp, ts->cmd_resp, sizeof(rek_resp))) { | |
330 | dev_err(&client->dev, | |
331 | "unexpected calibration response: %*ph\n", | |
332 | (int)sizeof(ts->cmd_resp), ts->cmd_resp); | |
333 | return -EINVAL; | |
334 | } | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static int elants_i2c_sw_reset(struct i2c_client *client) | |
340 | { | |
341 | const u8 soft_rst_cmd[] = { 0x77, 0x77, 0x77, 0x77 }; | |
342 | int error; | |
343 | ||
344 | error = elants_i2c_send(client, soft_rst_cmd, | |
345 | sizeof(soft_rst_cmd)); | |
346 | if (error) { | |
347 | dev_err(&client->dev, "software reset failed: %d\n", error); | |
348 | return error; | |
349 | } | |
350 | ||
351 | /* | |
352 | * We should wait at least 10 msec (but no more than 40) before | |
353 | * sending fastboot or IAP command to the device. | |
354 | */ | |
355 | msleep(30); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | static u16 elants_i2c_parse_version(u8 *buf) | |
361 | { | |
362 | return get_unaligned_be32(buf) >> 4; | |
363 | } | |
364 | ||
bc1d57fe | 365 | static int elants_i2c_query_hw_version(struct elants_data *ts) |
66aee900 SL |
366 | { |
367 | struct i2c_client *client = ts->client; | |
918e2844 | 368 | int retry_cnt = MAX_RETRIES; |
66aee900 SL |
369 | const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_ID, 0x00, 0x01 }; |
370 | u8 resp[HEADER_SIZE]; | |
918e2844 | 371 | int error; |
66aee900 | 372 | |
918e2844 | 373 | while (retry_cnt--) { |
66aee900 | 374 | error = elants_i2c_execute_command(client, cmd, sizeof(cmd), |
918e2844 MM |
375 | resp, sizeof(resp), 1, |
376 | "read fw id"); | |
377 | if (error) | |
378 | return error; | |
66aee900 | 379 | |
918e2844 MM |
380 | ts->hw_version = elants_i2c_parse_version(resp); |
381 | if (ts->hw_version != 0xffff) | |
382 | return 0; | |
bc1d57fe JC |
383 | } |
384 | ||
385 | dev_err(&client->dev, "Invalid fw id: %#04x\n", ts->hw_version); | |
66aee900 SL |
386 | |
387 | return -EINVAL; | |
388 | } | |
389 | ||
390 | static int elants_i2c_query_fw_version(struct elants_data *ts) | |
391 | { | |
392 | struct i2c_client *client = ts->client; | |
918e2844 | 393 | int retry_cnt = MAX_RETRIES; |
66aee900 SL |
394 | const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_VER, 0x00, 0x01 }; |
395 | u8 resp[HEADER_SIZE]; | |
918e2844 | 396 | int error; |
66aee900 | 397 | |
918e2844 | 398 | while (retry_cnt--) { |
66aee900 | 399 | error = elants_i2c_execute_command(client, cmd, sizeof(cmd), |
918e2844 MM |
400 | resp, sizeof(resp), 1, |
401 | "read fw version"); | |
402 | if (error) | |
403 | return error; | |
404 | ||
405 | ts->fw_version = elants_i2c_parse_version(resp); | |
406 | if (ts->fw_version != 0x0000 && ts->fw_version != 0xffff) | |
407 | return 0; | |
66aee900 | 408 | |
918e2844 MM |
409 | dev_dbg(&client->dev, "(read fw version) resp %*phC\n", |
410 | (int)sizeof(resp), resp); | |
66aee900 SL |
411 | } |
412 | ||
918e2844 | 413 | dev_err(&client->dev, "Invalid fw ver: %#04x\n", ts->fw_version); |
66aee900 SL |
414 | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | static int elants_i2c_query_test_version(struct elants_data *ts) | |
419 | { | |
420 | struct i2c_client *client = ts->client; | |
918e2844 | 421 | int error; |
66aee900 SL |
422 | u16 version; |
423 | const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_TEST_VER, 0x00, 0x01 }; | |
424 | u8 resp[HEADER_SIZE]; | |
425 | ||
918e2844 MM |
426 | error = elants_i2c_execute_command(client, cmd, sizeof(cmd), |
427 | resp, sizeof(resp), MAX_RETRIES, | |
428 | "read test version"); | |
429 | if (error) { | |
430 | dev_err(&client->dev, "Failed to read test version\n"); | |
431 | return error; | |
66aee900 SL |
432 | } |
433 | ||
918e2844 MM |
434 | version = elants_i2c_parse_version(resp); |
435 | ts->test_version = version >> 8; | |
436 | ts->solution_version = version & 0xff; | |
66aee900 | 437 | |
918e2844 | 438 | return 0; |
66aee900 SL |
439 | } |
440 | ||
441 | static int elants_i2c_query_bc_version(struct elants_data *ts) | |
442 | { | |
443 | struct i2c_client *client = ts->client; | |
444 | const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_BC_VER, 0x00, 0x01 }; | |
445 | u8 resp[HEADER_SIZE]; | |
446 | u16 version; | |
447 | int error; | |
448 | ||
449 | error = elants_i2c_execute_command(client, cmd, sizeof(cmd), | |
918e2844 MM |
450 | resp, sizeof(resp), 1, |
451 | "read BC version"); | |
452 | if (error) | |
66aee900 | 453 | return error; |
66aee900 SL |
454 | |
455 | version = elants_i2c_parse_version(resp); | |
456 | ts->bc_version = version >> 8; | |
457 | ts->iap_version = version & 0xff; | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
9517b95b MM |
462 | static int elants_i2c_query_ts_info_ektf(struct elants_data *ts) |
463 | { | |
464 | struct i2c_client *client = ts->client; | |
465 | int error; | |
466 | u8 resp[4]; | |
467 | u16 phy_x, phy_y; | |
468 | const u8 get_xres_cmd[] = { | |
469 | CMD_HEADER_READ, E_ELAN_INFO_X_RES, 0x00, 0x00 | |
470 | }; | |
471 | const u8 get_yres_cmd[] = { | |
472 | CMD_HEADER_READ, E_ELAN_INFO_Y_RES, 0x00, 0x00 | |
473 | }; | |
474 | ||
475 | /* Get X/Y size in mm */ | |
476 | error = elants_i2c_execute_command(client, get_xres_cmd, | |
477 | sizeof(get_xres_cmd), | |
478 | resp, sizeof(resp), 1, | |
479 | "get X size"); | |
480 | if (error) | |
481 | return error; | |
482 | ||
483 | phy_x = resp[2] | ((resp[3] & 0xF0) << 4); | |
484 | ||
485 | error = elants_i2c_execute_command(client, get_yres_cmd, | |
486 | sizeof(get_yres_cmd), | |
487 | resp, sizeof(resp), 1, | |
488 | "get Y size"); | |
489 | if (error) | |
490 | return error; | |
491 | ||
492 | phy_y = resp[2] | ((resp[3] & 0xF0) << 4); | |
493 | ||
494 | dev_dbg(&client->dev, "phy_x=%d, phy_y=%d\n", phy_x, phy_y); | |
495 | ||
496 | ts->phy_x = phy_x; | |
497 | ts->phy_y = phy_y; | |
498 | ||
499 | /* eKTF doesn't report max size, set it to default values */ | |
500 | ts->x_max = 2240 - 1; | |
501 | ts->y_max = 1408 - 1; | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | static int elants_i2c_query_ts_info_ekth(struct elants_data *ts) | |
66aee900 SL |
507 | { |
508 | struct i2c_client *client = ts->client; | |
509 | int error; | |
510 | u8 resp[17]; | |
511 | u16 phy_x, phy_y, rows, cols, osr; | |
512 | const u8 get_resolution_cmd[] = { | |
513 | CMD_HEADER_6B_READ, 0x00, 0x00, 0x00, 0x00, 0x00 | |
514 | }; | |
515 | const u8 get_osr_cmd[] = { | |
516 | CMD_HEADER_READ, E_INFO_OSR, 0x00, 0x01 | |
517 | }; | |
518 | const u8 get_physical_scan_cmd[] = { | |
519 | CMD_HEADER_READ, E_INFO_PHY_SCAN, 0x00, 0x01 | |
520 | }; | |
521 | const u8 get_physical_drive_cmd[] = { | |
522 | CMD_HEADER_READ, E_INFO_PHY_DRIVER, 0x00, 0x01 | |
523 | }; | |
524 | ||
525 | /* Get trace number */ | |
526 | error = elants_i2c_execute_command(client, | |
527 | get_resolution_cmd, | |
528 | sizeof(get_resolution_cmd), | |
918e2844 MM |
529 | resp, sizeof(resp), 1, |
530 | "get resolution"); | |
531 | if (error) | |
66aee900 | 532 | return error; |
66aee900 SL |
533 | |
534 | rows = resp[2] + resp[6] + resp[10]; | |
535 | cols = resp[3] + resp[7] + resp[11]; | |
536 | ||
4238e52c JC |
537 | /* Get report resolution value of ABS_MT_TOUCH_MAJOR */ |
538 | ts->major_res = resp[16]; | |
539 | ||
66aee900 SL |
540 | /* Process mm_to_pixel information */ |
541 | error = elants_i2c_execute_command(client, | |
542 | get_osr_cmd, sizeof(get_osr_cmd), | |
918e2844 MM |
543 | resp, sizeof(resp), 1, "get osr"); |
544 | if (error) | |
66aee900 | 545 | return error; |
66aee900 SL |
546 | |
547 | osr = resp[3]; | |
548 | ||
549 | error = elants_i2c_execute_command(client, | |
550 | get_physical_scan_cmd, | |
551 | sizeof(get_physical_scan_cmd), | |
918e2844 MM |
552 | resp, sizeof(resp), 1, |
553 | "get physical scan"); | |
554 | if (error) | |
66aee900 | 555 | return error; |
66aee900 SL |
556 | |
557 | phy_x = get_unaligned_be16(&resp[2]); | |
558 | ||
559 | error = elants_i2c_execute_command(client, | |
560 | get_physical_drive_cmd, | |
561 | sizeof(get_physical_drive_cmd), | |
918e2844 MM |
562 | resp, sizeof(resp), 1, |
563 | "get physical drive"); | |
564 | if (error) | |
66aee900 | 565 | return error; |
66aee900 SL |
566 | |
567 | phy_y = get_unaligned_be16(&resp[2]); | |
568 | ||
569 | dev_dbg(&client->dev, "phy_x=%d, phy_y=%d\n", phy_x, phy_y); | |
570 | ||
571 | if (rows == 0 || cols == 0 || osr == 0) { | |
572 | dev_warn(&client->dev, | |
573 | "invalid trace number data: %d, %d, %d\n", | |
574 | rows, cols, osr); | |
575 | } else { | |
576 | /* translate trace number to TS resolution */ | |
577 | ts->x_max = ELAN_TS_RESOLUTION(rows, osr); | |
578 | ts->x_res = DIV_ROUND_CLOSEST(ts->x_max, phy_x); | |
579 | ts->y_max = ELAN_TS_RESOLUTION(cols, osr); | |
580 | ts->y_res = DIV_ROUND_CLOSEST(ts->y_max, phy_y); | |
9517b95b MM |
581 | ts->phy_x = phy_x; |
582 | ts->phy_y = phy_y; | |
66aee900 SL |
583 | } |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | static int elants_i2c_fastboot(struct i2c_client *client) | |
589 | { | |
590 | const u8 boot_cmd[] = { 0x4D, 0x61, 0x69, 0x6E }; | |
591 | int error; | |
592 | ||
593 | error = elants_i2c_send(client, boot_cmd, sizeof(boot_cmd)); | |
594 | if (error) { | |
595 | dev_err(&client->dev, "boot failed: %d\n", error); | |
596 | return error; | |
597 | } | |
598 | ||
599 | dev_dbg(&client->dev, "boot success -- 0x%x\n", client->addr); | |
600 | return 0; | |
601 | } | |
602 | ||
603 | static int elants_i2c_initialize(struct elants_data *ts) | |
604 | { | |
605 | struct i2c_client *client = ts->client; | |
bc1d57fe | 606 | int error, error2, retry_cnt; |
66aee900 SL |
607 | const u8 hello_packet[] = { 0x55, 0x55, 0x55, 0x55 }; |
608 | const u8 recov_packet[] = { 0x55, 0x55, 0x80, 0x80 }; | |
609 | u8 buf[HEADER_SIZE]; | |
610 | ||
611 | for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { | |
612 | error = elants_i2c_sw_reset(client); | |
613 | if (error) { | |
614 | /* Continue initializing if it's the last try */ | |
615 | if (retry_cnt < MAX_RETRIES - 1) | |
616 | continue; | |
617 | } | |
618 | ||
619 | error = elants_i2c_fastboot(client); | |
620 | if (error) { | |
621 | /* Continue initializing if it's the last try */ | |
622 | if (retry_cnt < MAX_RETRIES - 1) | |
623 | continue; | |
624 | } | |
625 | ||
626 | /* Wait for Hello packet */ | |
627 | msleep(BOOT_TIME_DELAY_MS); | |
628 | ||
629 | error = elants_i2c_read(client, buf, sizeof(buf)); | |
630 | if (error) { | |
631 | dev_err(&client->dev, | |
632 | "failed to read 'hello' packet: %d\n", error); | |
633 | } else if (!memcmp(buf, hello_packet, sizeof(hello_packet))) { | |
634 | ts->iap_mode = ELAN_IAP_OPERATIONAL; | |
635 | break; | |
636 | } else if (!memcmp(buf, recov_packet, sizeof(recov_packet))) { | |
637 | /* | |
638 | * Setting error code will mark device | |
639 | * in recovery mode below. | |
640 | */ | |
641 | error = -EIO; | |
642 | break; | |
643 | } else { | |
644 | error = -EINVAL; | |
645 | dev_err(&client->dev, | |
646 | "invalid 'hello' packet: %*ph\n", | |
647 | (int)sizeof(buf), buf); | |
648 | } | |
649 | } | |
650 | ||
bc1d57fe JC |
651 | /* hw version is available even if device in recovery state */ |
652 | error2 = elants_i2c_query_hw_version(ts); | |
f0b57e19 JC |
653 | if (!error2) |
654 | error2 = elants_i2c_query_bc_version(ts); | |
66aee900 | 655 | if (!error) |
bc1d57fe JC |
656 | error = error2; |
657 | ||
66aee900 SL |
658 | if (!error) |
659 | error = elants_i2c_query_fw_version(ts); | |
bc1d57fe JC |
660 | if (!error) |
661 | error = elants_i2c_query_test_version(ts); | |
9517b95b MM |
662 | |
663 | switch (ts->chip_id) { | |
664 | case EKTH3500: | |
665 | if (!error) | |
666 | error = elants_i2c_query_ts_info_ekth(ts); | |
667 | break; | |
668 | case EKTF3624: | |
669 | if (!error) | |
670 | error = elants_i2c_query_ts_info_ektf(ts); | |
671 | break; | |
672 | default: | |
ede6747c | 673 | BUG(); |
9517b95b | 674 | } |
66aee900 | 675 | |
bc1d57fe | 676 | if (error) |
66aee900 | 677 | ts->iap_mode = ELAN_IAP_RECOVERY; |
66aee900 SL |
678 | |
679 | return 0; | |
680 | } | |
681 | ||
682 | /* | |
683 | * Firmware update interface. | |
684 | */ | |
685 | ||
686 | static int elants_i2c_fw_write_page(struct i2c_client *client, | |
687 | const void *page) | |
688 | { | |
689 | const u8 ack_ok[] = { 0xaa, 0xaa }; | |
690 | u8 buf[2]; | |
691 | int retry; | |
692 | int error; | |
693 | ||
694 | for (retry = 0; retry < MAX_FW_UPDATE_RETRIES; retry++) { | |
695 | error = elants_i2c_send(client, page, ELAN_FW_PAGESIZE); | |
696 | if (error) { | |
697 | dev_err(&client->dev, | |
698 | "IAP Write Page failed: %d\n", error); | |
699 | continue; | |
700 | } | |
701 | ||
702 | error = elants_i2c_read(client, buf, 2); | |
703 | if (error) { | |
704 | dev_err(&client->dev, | |
705 | "IAP Ack read failed: %d\n", error); | |
706 | return error; | |
707 | } | |
708 | ||
709 | if (!memcmp(buf, ack_ok, sizeof(ack_ok))) | |
710 | return 0; | |
711 | ||
712 | error = -EIO; | |
713 | dev_err(&client->dev, | |
714 | "IAP Get Ack Error [%02x:%02x]\n", | |
715 | buf[0], buf[1]); | |
716 | } | |
717 | ||
718 | return error; | |
719 | } | |
720 | ||
f0b57e19 JC |
721 | static int elants_i2c_validate_remark_id(struct elants_data *ts, |
722 | const struct firmware *fw) | |
723 | { | |
724 | struct i2c_client *client = ts->client; | |
725 | int error; | |
726 | const u8 cmd[] = { CMD_HEADER_ROM_READ, 0x80, 0x1F, 0x00, 0x00, 0x21 }; | |
727 | u8 resp[6] = { 0 }; | |
728 | u16 ts_remark_id = 0; | |
729 | u16 fw_remark_id = 0; | |
730 | ||
731 | /* Compare TS Remark ID and FW Remark ID */ | |
732 | error = elants_i2c_execute_command(client, cmd, sizeof(cmd), | |
918e2844 MM |
733 | resp, sizeof(resp), |
734 | 1, "read Remark ID"); | |
735 | if (error) | |
f0b57e19 | 736 | return error; |
f0b57e19 JC |
737 | |
738 | ts_remark_id = get_unaligned_be16(&resp[3]); | |
739 | ||
740 | fw_remark_id = get_unaligned_le16(&fw->data[fw->size - 4]); | |
741 | ||
742 | if (fw_remark_id != ts_remark_id) { | |
743 | dev_err(&client->dev, | |
744 | "Remark ID Mismatched: ts_remark_id=0x%04x, fw_remark_id=0x%04x.\n", | |
745 | ts_remark_id, fw_remark_id); | |
746 | return -EINVAL; | |
747 | } | |
748 | ||
749 | return 0; | |
750 | } | |
751 | ||
b2b2318a JC |
752 | static bool elants_i2c_should_check_remark_id(struct elants_data *ts) |
753 | { | |
754 | struct i2c_client *client = ts->client; | |
755 | const u8 bootcode_version = ts->iap_version; | |
756 | bool check; | |
757 | ||
758 | /* I2C eKTH3900 and eKTH5312 are NOT support Remark ID */ | |
759 | if ((bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x1_I2C) || | |
760 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x2_I2C) || | |
761 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x3_I2C) || | |
762 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x1_I2C) || | |
763 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x2_I2C) || | |
764 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C) || | |
765 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C) || | |
766 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x1_I2C_USB) || | |
767 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x2_I2C_USB) || | |
768 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C_USB) || | |
769 | (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C_USB)) { | |
770 | dev_dbg(&client->dev, | |
771 | "eKTH3900/eKTH5312(0x%02x) are not support remark id\n", | |
772 | bootcode_version); | |
773 | check = false; | |
774 | } else if (bootcode_version >= 0x60) { | |
775 | check = true; | |
776 | } else { | |
777 | check = false; | |
778 | } | |
779 | ||
780 | return check; | |
781 | } | |
782 | ||
66aee900 SL |
783 | static int elants_i2c_do_update_firmware(struct i2c_client *client, |
784 | const struct firmware *fw, | |
785 | bool force) | |
786 | { | |
f0b57e19 | 787 | struct elants_data *ts = i2c_get_clientdata(client); |
66aee900 SL |
788 | const u8 enter_iap[] = { 0x45, 0x49, 0x41, 0x50 }; |
789 | const u8 enter_iap2[] = { 0x54, 0x00, 0x12, 0x34 }; | |
790 | const u8 iap_ack[] = { 0x55, 0xaa, 0x33, 0xcc }; | |
f0b57e19 | 791 | const u8 close_idle[] = { 0x54, 0x2c, 0x01, 0x01 }; |
66aee900 SL |
792 | u8 buf[HEADER_SIZE]; |
793 | u16 send_id; | |
794 | int page, n_fw_pages; | |
795 | int error; | |
b2b2318a | 796 | bool check_remark_id = elants_i2c_should_check_remark_id(ts); |
66aee900 SL |
797 | |
798 | /* Recovery mode detection! */ | |
799 | if (force) { | |
800 | dev_dbg(&client->dev, "Recovery mode procedure\n"); | |
f0b57e19 JC |
801 | |
802 | if (check_remark_id) { | |
803 | error = elants_i2c_validate_remark_id(ts, fw); | |
804 | if (error) | |
805 | return error; | |
806 | } | |
807 | ||
66aee900 | 808 | error = elants_i2c_send(client, enter_iap2, sizeof(enter_iap2)); |
f0b57e19 JC |
809 | if (error) { |
810 | dev_err(&client->dev, "failed to enter IAP mode: %d\n", | |
811 | error); | |
812 | return error; | |
813 | } | |
66aee900 SL |
814 | } else { |
815 | /* Start IAP Procedure */ | |
816 | dev_dbg(&client->dev, "Normal IAP procedure\n"); | |
f0b57e19 | 817 | |
6fd38502 JC |
818 | /* Close idle mode */ |
819 | error = elants_i2c_send(client, close_idle, sizeof(close_idle)); | |
820 | if (error) | |
821 | dev_err(&client->dev, "Failed close idle: %d\n", error); | |
822 | msleep(60); | |
f0b57e19 | 823 | |
66aee900 | 824 | elants_i2c_sw_reset(client); |
6fd38502 | 825 | msleep(20); |
66aee900 | 826 | |
f0b57e19 JC |
827 | if (check_remark_id) { |
828 | error = elants_i2c_validate_remark_id(ts, fw); | |
829 | if (error) | |
830 | return error; | |
831 | } | |
832 | ||
833 | error = elants_i2c_send(client, enter_iap, sizeof(enter_iap)); | |
834 | if (error) { | |
835 | dev_err(&client->dev, "failed to enter IAP mode: %d\n", | |
836 | error); | |
837 | return error; | |
838 | } | |
66aee900 SL |
839 | } |
840 | ||
841 | msleep(20); | |
842 | ||
843 | /* check IAP state */ | |
844 | error = elants_i2c_read(client, buf, 4); | |
845 | if (error) { | |
846 | dev_err(&client->dev, | |
847 | "failed to read IAP acknowledgement: %d\n", | |
848 | error); | |
849 | return error; | |
850 | } | |
851 | ||
852 | if (memcmp(buf, iap_ack, sizeof(iap_ack))) { | |
853 | dev_err(&client->dev, | |
854 | "failed to enter IAP: %*ph (expected %*ph)\n", | |
855 | (int)sizeof(buf), buf, (int)sizeof(iap_ack), iap_ack); | |
856 | return -EIO; | |
857 | } | |
858 | ||
859 | dev_info(&client->dev, "successfully entered IAP mode"); | |
860 | ||
861 | send_id = client->addr; | |
862 | error = elants_i2c_send(client, &send_id, 1); | |
863 | if (error) { | |
864 | dev_err(&client->dev, "sending dummy byte failed: %d\n", | |
865 | error); | |
866 | return error; | |
867 | } | |
868 | ||
869 | /* Clear the last page of Master */ | |
870 | error = elants_i2c_send(client, fw->data, ELAN_FW_PAGESIZE); | |
871 | if (error) { | |
872 | dev_err(&client->dev, "clearing of the last page failed: %d\n", | |
873 | error); | |
874 | return error; | |
875 | } | |
876 | ||
877 | error = elants_i2c_read(client, buf, 2); | |
878 | if (error) { | |
879 | dev_err(&client->dev, | |
880 | "failed to read ACK for clearing the last page: %d\n", | |
881 | error); | |
882 | return error; | |
883 | } | |
884 | ||
885 | n_fw_pages = fw->size / ELAN_FW_PAGESIZE; | |
886 | dev_dbg(&client->dev, "IAP Pages = %d\n", n_fw_pages); | |
887 | ||
888 | for (page = 0; page < n_fw_pages; page++) { | |
889 | error = elants_i2c_fw_write_page(client, | |
890 | fw->data + page * ELAN_FW_PAGESIZE); | |
891 | if (error) { | |
892 | dev_err(&client->dev, | |
893 | "failed to write FW page %d: %d\n", | |
894 | page, error); | |
895 | return error; | |
896 | } | |
897 | } | |
898 | ||
899 | /* Old iap needs to wait 200ms for WDT and rest is for hello packets */ | |
900 | msleep(300); | |
901 | ||
902 | dev_info(&client->dev, "firmware update completed\n"); | |
903 | return 0; | |
904 | } | |
905 | ||
906 | static int elants_i2c_fw_update(struct elants_data *ts) | |
907 | { | |
908 | struct i2c_client *client = ts->client; | |
909 | const struct firmware *fw; | |
37dee1ac | 910 | char *fw_name; |
66aee900 SL |
911 | int error; |
912 | ||
8c0776a8 | 913 | fw_name = kasprintf(GFP_KERNEL, "elants_i2c_%04x.bin", ts->hw_version); |
37dee1ac CM |
914 | if (!fw_name) |
915 | return -ENOMEM; | |
916 | ||
917 | dev_info(&client->dev, "requesting fw name = %s\n", fw_name); | |
918 | error = request_firmware(&fw, fw_name, &client->dev); | |
919 | kfree(fw_name); | |
66aee900 | 920 | if (error) { |
37dee1ac CM |
921 | dev_err(&client->dev, "failed to request firmware: %d\n", |
922 | error); | |
66aee900 SL |
923 | return error; |
924 | } | |
925 | ||
926 | if (fw->size % ELAN_FW_PAGESIZE) { | |
927 | dev_err(&client->dev, "invalid firmware length: %zu\n", | |
928 | fw->size); | |
929 | error = -EINVAL; | |
930 | goto out; | |
931 | } | |
932 | ||
933 | disable_irq(client->irq); | |
934 | ||
935 | error = elants_i2c_do_update_firmware(client, fw, | |
936 | ts->iap_mode == ELAN_IAP_RECOVERY); | |
937 | if (error) { | |
938 | dev_err(&client->dev, "firmware update failed: %d\n", error); | |
939 | ts->iap_mode = ELAN_IAP_RECOVERY; | |
940 | goto out_enable_irq; | |
941 | } | |
942 | ||
943 | error = elants_i2c_initialize(ts); | |
944 | if (error) { | |
945 | dev_err(&client->dev, | |
946 | "failed to initialize device after firmware update: %d\n", | |
947 | error); | |
948 | ts->iap_mode = ELAN_IAP_RECOVERY; | |
949 | goto out_enable_irq; | |
950 | } | |
951 | ||
952 | ts->iap_mode = ELAN_IAP_OPERATIONAL; | |
953 | ||
954 | out_enable_irq: | |
955 | ts->state = ELAN_STATE_NORMAL; | |
956 | enable_irq(client->irq); | |
957 | msleep(100); | |
958 | ||
959 | if (!error) | |
960 | elants_i2c_calibrate(ts); | |
961 | out: | |
962 | release_firmware(fw); | |
963 | return error; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Event reporting. | |
968 | */ | |
969 | ||
9517b95b MM |
970 | static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf, |
971 | size_t packet_size) | |
66aee900 SL |
972 | { |
973 | struct input_dev *input = ts->input; | |
974 | unsigned int n_fingers; | |
f27ad893 | 975 | unsigned int tool_type; |
66aee900 SL |
976 | u16 finger_state; |
977 | int i; | |
978 | ||
979 | n_fingers = buf[FW_POS_STATE + 1] & 0x0f; | |
980 | finger_state = ((buf[FW_POS_STATE + 1] & 0x30) << 4) | | |
981 | buf[FW_POS_STATE]; | |
982 | ||
983 | dev_dbg(&ts->client->dev, | |
984 | "n_fingers: %u, state: %04x\n", n_fingers, finger_state); | |
985 | ||
f27ad893 JC |
986 | /* Note: all fingers have the same tool type */ |
987 | tool_type = buf[FW_POS_TOOL_TYPE] & BIT(0) ? | |
988 | MT_TOOL_FINGER : MT_TOOL_PALM; | |
989 | ||
66aee900 SL |
990 | for (i = 0; i < MAX_CONTACT_NUM && n_fingers; i++) { |
991 | if (finger_state & 1) { | |
992 | unsigned int x, y, p, w; | |
993 | u8 *pos; | |
994 | ||
995 | pos = &buf[FW_POS_XY + i * 3]; | |
996 | x = (((u16)pos[0] & 0xf0) << 4) | pos[1]; | |
997 | y = (((u16)pos[0] & 0x0f) << 8) | pos[2]; | |
9517b95b MM |
998 | |
999 | /* | |
1000 | * eKTF3624 may have use "old" touch-report format, | |
1001 | * depending on a device and TS firmware version. | |
1002 | * For example, ASUS Transformer devices use the "old" | |
1003 | * format, while ASUS Nexus 7 uses the "new" formant. | |
1004 | */ | |
1005 | if (packet_size == PACKET_SIZE_OLD && | |
1006 | ts->chip_id == EKTF3624) { | |
1007 | w = buf[FW_POS_WIDTH + i / 2]; | |
1008 | w >>= 4 * (~i & 1); | |
1009 | w |= w << 4; | |
1010 | w |= !w; | |
1011 | p = w; | |
1012 | } else { | |
1013 | p = buf[FW_POS_PRESSURE + i]; | |
1014 | w = buf[FW_POS_WIDTH + i]; | |
1015 | } | |
66aee900 SL |
1016 | |
1017 | dev_dbg(&ts->client->dev, "i=%d x=%d y=%d p=%d w=%d\n", | |
1018 | i, x, y, p, w); | |
1019 | ||
1020 | input_mt_slot(input, i); | |
f27ad893 | 1021 | input_mt_report_slot_state(input, tool_type, true); |
68334dba | 1022 | touchscreen_report_pos(input, &ts->prop, x, y, true); |
66aee900 SL |
1023 | input_event(input, EV_ABS, ABS_MT_PRESSURE, p); |
1024 | input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, w); | |
1025 | ||
1026 | n_fingers--; | |
1027 | } | |
1028 | ||
1029 | finger_state >>= 1; | |
1030 | } | |
1031 | ||
1032 | input_mt_sync_frame(input); | |
1033 | input_sync(input); | |
1034 | } | |
1035 | ||
1036 | static u8 elants_i2c_calculate_checksum(u8 *buf) | |
1037 | { | |
1038 | u8 checksum = 0; | |
1039 | u8 i; | |
1040 | ||
1041 | for (i = 0; i < FW_POS_CHECKSUM; i++) | |
1042 | checksum += buf[i]; | |
1043 | ||
1044 | return checksum; | |
1045 | } | |
1046 | ||
9517b95b MM |
1047 | static void elants_i2c_event(struct elants_data *ts, u8 *buf, |
1048 | size_t packet_size) | |
66aee900 SL |
1049 | { |
1050 | u8 checksum = elants_i2c_calculate_checksum(buf); | |
1051 | ||
1052 | if (unlikely(buf[FW_POS_CHECKSUM] != checksum)) | |
1053 | dev_warn(&ts->client->dev, | |
1054 | "%s: invalid checksum for packet %02x: %02x vs. %02x\n", | |
1055 | __func__, buf[FW_POS_HEADER], | |
1056 | checksum, buf[FW_POS_CHECKSUM]); | |
1057 | else if (unlikely(buf[FW_POS_HEADER] != HEADER_REPORT_10_FINGER)) | |
1058 | dev_warn(&ts->client->dev, | |
1059 | "%s: unknown packet type: %02x\n", | |
1060 | __func__, buf[FW_POS_HEADER]); | |
1061 | else | |
9517b95b | 1062 | elants_i2c_mt_event(ts, buf, packet_size); |
66aee900 SL |
1063 | } |
1064 | ||
1065 | static irqreturn_t elants_i2c_irq(int irq, void *_dev) | |
1066 | { | |
1067 | const u8 wait_packet[] = { 0x64, 0x64, 0x64, 0x64 }; | |
1068 | struct elants_data *ts = _dev; | |
1069 | struct i2c_client *client = ts->client; | |
1070 | int report_count, report_len; | |
1071 | int i; | |
1072 | int len; | |
1073 | ||
00f73f97 | 1074 | len = i2c_master_recv_dmasafe(client, ts->buf, sizeof(ts->buf)); |
66aee900 SL |
1075 | if (len < 0) { |
1076 | dev_err(&client->dev, "%s: failed to read data: %d\n", | |
1077 | __func__, len); | |
1078 | goto out; | |
1079 | } | |
1080 | ||
1081 | dev_dbg(&client->dev, "%s: packet %*ph\n", | |
1082 | __func__, HEADER_SIZE, ts->buf); | |
1083 | ||
1084 | switch (ts->state) { | |
1085 | case ELAN_WAIT_RECALIBRATION: | |
1086 | if (ts->buf[FW_HDR_TYPE] == CMD_HEADER_REK) { | |
1087 | memcpy(ts->cmd_resp, ts->buf, sizeof(ts->cmd_resp)); | |
1088 | complete(&ts->cmd_done); | |
1089 | ts->state = ELAN_STATE_NORMAL; | |
1090 | } | |
1091 | break; | |
1092 | ||
1093 | case ELAN_WAIT_QUEUE_HEADER: | |
1094 | if (ts->buf[FW_HDR_TYPE] != QUEUE_HEADER_NORMAL) | |
1095 | break; | |
1096 | ||
1097 | ts->state = ELAN_STATE_NORMAL; | |
6f49c4f5 | 1098 | fallthrough; |
66aee900 SL |
1099 | |
1100 | case ELAN_STATE_NORMAL: | |
1101 | ||
1102 | switch (ts->buf[FW_HDR_TYPE]) { | |
1103 | case CMD_HEADER_HELLO: | |
1104 | case CMD_HEADER_RESP: | |
66aee900 SL |
1105 | break; |
1106 | ||
1107 | case QUEUE_HEADER_WAIT: | |
1108 | if (memcmp(ts->buf, wait_packet, sizeof(wait_packet))) { | |
1109 | dev_err(&client->dev, | |
1110 | "invalid wait packet %*ph\n", | |
1111 | HEADER_SIZE, ts->buf); | |
1112 | } else { | |
1113 | ts->state = ELAN_WAIT_QUEUE_HEADER; | |
1114 | udelay(30); | |
1115 | } | |
1116 | break; | |
1117 | ||
1118 | case QUEUE_HEADER_SINGLE: | |
9517b95b MM |
1119 | elants_i2c_event(ts, &ts->buf[HEADER_SIZE], |
1120 | ts->buf[FW_HDR_LENGTH]); | |
66aee900 SL |
1121 | break; |
1122 | ||
9517b95b MM |
1123 | case QUEUE_HEADER_NORMAL2: /* CMD_HEADER_REK */ |
1124 | /* | |
1125 | * Depending on firmware version, eKTF3624 touchscreens | |
1126 | * may utilize one of these opcodes for the touch events: | |
1127 | * 0x63 (NORMAL) and 0x66 (NORMAL2). The 0x63 is used by | |
1128 | * older firmware version and differs from 0x66 such that | |
1129 | * touch pressure value needs to be adjusted. The 0x66 | |
1130 | * opcode of newer firmware is equal to 0x63 of eKTH3500. | |
1131 | */ | |
1132 | if (ts->chip_id != EKTF3624) | |
1133 | break; | |
1134 | ||
1135 | fallthrough; | |
1136 | ||
66aee900 SL |
1137 | case QUEUE_HEADER_NORMAL: |
1138 | report_count = ts->buf[FW_HDR_COUNT]; | |
1c3415a0 | 1139 | if (report_count == 0 || report_count > 3) { |
66aee900 | 1140 | dev_err(&client->dev, |
1c3415a0 | 1141 | "bad report count: %*ph\n", |
66aee900 SL |
1142 | HEADER_SIZE, ts->buf); |
1143 | break; | |
1144 | } | |
1145 | ||
1146 | report_len = ts->buf[FW_HDR_LENGTH] / report_count; | |
9517b95b MM |
1147 | |
1148 | if (report_len == PACKET_SIZE_OLD && | |
1149 | ts->chip_id == EKTF3624) { | |
1150 | dev_dbg_once(&client->dev, | |
1151 | "using old report format\n"); | |
1152 | } else if (report_len != PACKET_SIZE) { | |
66aee900 SL |
1153 | dev_err(&client->dev, |
1154 | "mismatching report length: %*ph\n", | |
1155 | HEADER_SIZE, ts->buf); | |
1156 | break; | |
1157 | } | |
1158 | ||
1159 | for (i = 0; i < report_count; i++) { | |
1160 | u8 *buf = ts->buf + HEADER_SIZE + | |
9517b95b MM |
1161 | i * report_len; |
1162 | elants_i2c_event(ts, buf, report_len); | |
66aee900 SL |
1163 | } |
1164 | break; | |
1165 | ||
1166 | default: | |
1167 | dev_err(&client->dev, "unknown packet %*ph\n", | |
1168 | HEADER_SIZE, ts->buf); | |
1169 | break; | |
1170 | } | |
1171 | break; | |
1172 | } | |
1173 | ||
1174 | out: | |
1175 | return IRQ_HANDLED; | |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | * sysfs interface | |
1180 | */ | |
1181 | static ssize_t calibrate_store(struct device *dev, | |
1182 | struct device_attribute *attr, | |
cf520c64 | 1183 | const char *buf, size_t count) |
66aee900 SL |
1184 | { |
1185 | struct i2c_client *client = to_i2c_client(dev); | |
1186 | struct elants_data *ts = i2c_get_clientdata(client); | |
1187 | int error; | |
1188 | ||
1189 | error = mutex_lock_interruptible(&ts->sysfs_mutex); | |
1190 | if (error) | |
1191 | return error; | |
1192 | ||
1193 | error = elants_i2c_calibrate(ts); | |
1194 | ||
1195 | mutex_unlock(&ts->sysfs_mutex); | |
1196 | return error ?: count; | |
1197 | } | |
1198 | ||
1199 | static ssize_t write_update_fw(struct device *dev, | |
1200 | struct device_attribute *attr, | |
1201 | const char *buf, size_t count) | |
1202 | { | |
1203 | struct i2c_client *client = to_i2c_client(dev); | |
1204 | struct elants_data *ts = i2c_get_clientdata(client); | |
1205 | int error; | |
1206 | ||
1207 | error = mutex_lock_interruptible(&ts->sysfs_mutex); | |
1208 | if (error) | |
1209 | return error; | |
1210 | ||
1211 | error = elants_i2c_fw_update(ts); | |
1212 | dev_dbg(dev, "firmware update result: %d\n", error); | |
1213 | ||
1214 | mutex_unlock(&ts->sysfs_mutex); | |
1215 | return error ?: count; | |
1216 | } | |
1217 | ||
1218 | static ssize_t show_iap_mode(struct device *dev, | |
1219 | struct device_attribute *attr, char *buf) | |
1220 | { | |
1221 | struct i2c_client *client = to_i2c_client(dev); | |
1222 | struct elants_data *ts = i2c_get_clientdata(client); | |
1223 | ||
1224 | return sprintf(buf, "%s\n", | |
1225 | ts->iap_mode == ELAN_IAP_OPERATIONAL ? | |
1226 | "Normal" : "Recovery"); | |
1227 | } | |
1228 | ||
cf520c64 JC |
1229 | static ssize_t show_calibration_count(struct device *dev, |
1230 | struct device_attribute *attr, char *buf) | |
1231 | { | |
1232 | struct i2c_client *client = to_i2c_client(dev); | |
1233 | const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_REK, 0x00, 0x01 }; | |
1234 | u8 resp[HEADER_SIZE]; | |
1235 | u16 rek_count; | |
1236 | int error; | |
1237 | ||
1238 | error = elants_i2c_execute_command(client, cmd, sizeof(cmd), | |
918e2844 MM |
1239 | resp, sizeof(resp), 1, |
1240 | "read ReK status"); | |
1241 | if (error) | |
cf520c64 | 1242 | return sprintf(buf, "%d\n", error); |
cf520c64 JC |
1243 | |
1244 | rek_count = get_unaligned_be16(&resp[2]); | |
cf520c64 JC |
1245 | return sprintf(buf, "0x%04x\n", rek_count); |
1246 | } | |
1247 | ||
6cbaefb4 | 1248 | static DEVICE_ATTR_WO(calibrate); |
66aee900 | 1249 | static DEVICE_ATTR(iap_mode, S_IRUGO, show_iap_mode, NULL); |
cf520c64 | 1250 | static DEVICE_ATTR(calibration_count, S_IRUGO, show_calibration_count, NULL); |
66aee900 SL |
1251 | static DEVICE_ATTR(update_fw, S_IWUSR, NULL, write_update_fw); |
1252 | ||
1253 | struct elants_version_attribute { | |
1254 | struct device_attribute dattr; | |
1255 | size_t field_offset; | |
1256 | size_t field_size; | |
1257 | }; | |
1258 | ||
1259 | #define __ELANTS_FIELD_SIZE(_field) \ | |
1260 | sizeof(((struct elants_data *)NULL)->_field) | |
1261 | #define __ELANTS_VERIFY_SIZE(_field) \ | |
1262 | (BUILD_BUG_ON_ZERO(__ELANTS_FIELD_SIZE(_field) > 2) + \ | |
1263 | __ELANTS_FIELD_SIZE(_field)) | |
1264 | #define ELANTS_VERSION_ATTR(_field) \ | |
1265 | struct elants_version_attribute elants_ver_attr_##_field = { \ | |
1266 | .dattr = __ATTR(_field, S_IRUGO, \ | |
1267 | elants_version_attribute_show, NULL), \ | |
1268 | .field_offset = offsetof(struct elants_data, _field), \ | |
1269 | .field_size = __ELANTS_VERIFY_SIZE(_field), \ | |
1270 | } | |
1271 | ||
1272 | static ssize_t elants_version_attribute_show(struct device *dev, | |
1273 | struct device_attribute *dattr, | |
1274 | char *buf) | |
1275 | { | |
1276 | struct i2c_client *client = to_i2c_client(dev); | |
1277 | struct elants_data *ts = i2c_get_clientdata(client); | |
1278 | struct elants_version_attribute *attr = | |
1279 | container_of(dattr, struct elants_version_attribute, dattr); | |
1280 | u8 *field = (u8 *)((char *)ts + attr->field_offset); | |
1281 | unsigned int fmt_size; | |
1282 | unsigned int val; | |
1283 | ||
1284 | if (attr->field_size == 1) { | |
1285 | val = *field; | |
1286 | fmt_size = 2; /* 2 HEX digits */ | |
1287 | } else { | |
1288 | val = *(u16 *)field; | |
1289 | fmt_size = 4; /* 4 HEX digits */ | |
1290 | } | |
1291 | ||
1292 | return sprintf(buf, "%0*x\n", fmt_size, val); | |
1293 | } | |
1294 | ||
1295 | static ELANTS_VERSION_ATTR(fw_version); | |
1296 | static ELANTS_VERSION_ATTR(hw_version); | |
1297 | static ELANTS_VERSION_ATTR(test_version); | |
1298 | static ELANTS_VERSION_ATTR(solution_version); | |
1299 | static ELANTS_VERSION_ATTR(bc_version); | |
1300 | static ELANTS_VERSION_ATTR(iap_version); | |
1301 | ||
1302 | static struct attribute *elants_attributes[] = { | |
1303 | &dev_attr_calibrate.attr, | |
1304 | &dev_attr_update_fw.attr, | |
1305 | &dev_attr_iap_mode.attr, | |
cf520c64 | 1306 | &dev_attr_calibration_count.attr, |
66aee900 SL |
1307 | |
1308 | &elants_ver_attr_fw_version.dattr.attr, | |
1309 | &elants_ver_attr_hw_version.dattr.attr, | |
1310 | &elants_ver_attr_test_version.dattr.attr, | |
1311 | &elants_ver_attr_solution_version.dattr.attr, | |
1312 | &elants_ver_attr_bc_version.dattr.attr, | |
1313 | &elants_ver_attr_iap_version.dattr.attr, | |
1314 | NULL | |
1315 | }; | |
1316 | ||
48f960dd | 1317 | static const struct attribute_group elants_attribute_group = { |
66aee900 SL |
1318 | .attrs = elants_attributes, |
1319 | }; | |
1320 | ||
afe10358 DT |
1321 | static int elants_i2c_power_on(struct elants_data *ts) |
1322 | { | |
1323 | int error; | |
1324 | ||
1325 | /* | |
1326 | * If we do not have reset gpio assume platform firmware | |
1327 | * controls regulators and does power them on for us. | |
1328 | */ | |
1329 | if (IS_ERR_OR_NULL(ts->reset_gpio)) | |
1330 | return 0; | |
1331 | ||
1332 | gpiod_set_value_cansleep(ts->reset_gpio, 1); | |
1333 | ||
1334 | error = regulator_enable(ts->vcc33); | |
1335 | if (error) { | |
1336 | dev_err(&ts->client->dev, | |
1337 | "failed to enable vcc33 regulator: %d\n", | |
1338 | error); | |
1339 | goto release_reset_gpio; | |
1340 | } | |
1341 | ||
1342 | error = regulator_enable(ts->vccio); | |
1343 | if (error) { | |
1344 | dev_err(&ts->client->dev, | |
1345 | "failed to enable vccio regulator: %d\n", | |
1346 | error); | |
1347 | regulator_disable(ts->vcc33); | |
1348 | goto release_reset_gpio; | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * We need to wait a bit after powering on controller before | |
1353 | * we are allowed to release reset GPIO. | |
1354 | */ | |
1355 | udelay(ELAN_POWERON_DELAY_USEC); | |
1356 | ||
1357 | release_reset_gpio: | |
1358 | gpiod_set_value_cansleep(ts->reset_gpio, 0); | |
1359 | if (error) | |
1360 | return error; | |
1361 | ||
1362 | msleep(ELAN_RESET_DELAY_MSEC); | |
1363 | ||
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | static void elants_i2c_power_off(void *_data) | |
1368 | { | |
1369 | struct elants_data *ts = _data; | |
1370 | ||
1371 | if (!IS_ERR_OR_NULL(ts->reset_gpio)) { | |
1372 | /* | |
1373 | * Activate reset gpio to prevent leakage through the | |
1374 | * pin once we shut off power to the controller. | |
1375 | */ | |
1376 | gpiod_set_value_cansleep(ts->reset_gpio, 1); | |
1377 | regulator_disable(ts->vccio); | |
1378 | regulator_disable(ts->vcc33); | |
1379 | } | |
1380 | } | |
1381 | ||
65299e8b HG |
1382 | #ifdef CONFIG_ACPI |
1383 | static const struct acpi_device_id i2c_hid_ids[] = { | |
1384 | {"ACPI0C50", 0 }, | |
1385 | {"PNP0C50", 0 }, | |
1386 | { }, | |
1387 | }; | |
1388 | ||
1389 | static const guid_t i2c_hid_guid = | |
1390 | GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555, | |
1391 | 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE); | |
1392 | ||
1393 | static bool elants_acpi_is_hid_device(struct device *dev) | |
1394 | { | |
1395 | acpi_handle handle = ACPI_HANDLE(dev); | |
1396 | union acpi_object *obj; | |
1397 | ||
1398 | if (acpi_match_device_ids(ACPI_COMPANION(dev), i2c_hid_ids)) | |
1399 | return false; | |
1400 | ||
1401 | obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, ACPI_TYPE_INTEGER); | |
1402 | if (obj) { | |
1403 | ACPI_FREE(obj); | |
1404 | return true; | |
1405 | } | |
1406 | ||
1407 | return false; | |
1408 | } | |
1409 | #else | |
1410 | static bool elants_acpi_is_hid_device(struct device *dev) | |
1411 | { | |
1412 | return false; | |
1413 | } | |
1414 | #endif | |
1415 | ||
45a4b683 | 1416 | static int elants_i2c_probe(struct i2c_client *client) |
66aee900 SL |
1417 | { |
1418 | union i2c_smbus_data dummy; | |
1419 | struct elants_data *ts; | |
1420 | unsigned long irqflags; | |
1421 | int error; | |
1422 | ||
65299e8b HG |
1423 | /* Don't bind to i2c-hid compatible devices, these are handled by the i2c-hid drv. */ |
1424 | if (elants_acpi_is_hid_device(&client->dev)) { | |
1425 | dev_warn(&client->dev, "This device appears to be an I2C-HID device, not binding\n"); | |
1426 | return -ENODEV; | |
1427 | } | |
1428 | ||
66aee900 | 1429 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { |
65299e8b | 1430 | dev_err(&client->dev, "I2C check functionality error\n"); |
66aee900 SL |
1431 | return -ENXIO; |
1432 | } | |
1433 | ||
66aee900 SL |
1434 | ts = devm_kzalloc(&client->dev, sizeof(struct elants_data), GFP_KERNEL); |
1435 | if (!ts) | |
1436 | return -ENOMEM; | |
1437 | ||
1438 | mutex_init(&ts->sysfs_mutex); | |
1439 | init_completion(&ts->cmd_done); | |
1440 | ||
1441 | ts->client = client; | |
b9c0ebb8 | 1442 | ts->chip_id = (enum elants_chip_id)(uintptr_t)device_get_match_data(&client->dev); |
66aee900 SL |
1443 | i2c_set_clientdata(client, ts); |
1444 | ||
afe10358 DT |
1445 | ts->vcc33 = devm_regulator_get(&client->dev, "vcc33"); |
1446 | if (IS_ERR(ts->vcc33)) { | |
1447 | error = PTR_ERR(ts->vcc33); | |
1448 | if (error != -EPROBE_DEFER) | |
1449 | dev_err(&client->dev, | |
1450 | "Failed to get 'vcc33' regulator: %d\n", | |
1451 | error); | |
1452 | return error; | |
1453 | } | |
1454 | ||
1455 | ts->vccio = devm_regulator_get(&client->dev, "vccio"); | |
1456 | if (IS_ERR(ts->vccio)) { | |
1457 | error = PTR_ERR(ts->vccio); | |
1458 | if (error != -EPROBE_DEFER) | |
1459 | dev_err(&client->dev, | |
1460 | "Failed to get 'vccio' regulator: %d\n", | |
1461 | error); | |
1462 | return error; | |
1463 | } | |
1464 | ||
7229b87b | 1465 | ts->reset_gpio = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_LOW); |
afe10358 DT |
1466 | if (IS_ERR(ts->reset_gpio)) { |
1467 | error = PTR_ERR(ts->reset_gpio); | |
1468 | ||
1469 | if (error == -EPROBE_DEFER) | |
1470 | return error; | |
1471 | ||
1472 | if (error != -ENOENT && error != -ENOSYS) { | |
1473 | dev_err(&client->dev, | |
1474 | "failed to get reset gpio: %d\n", | |
1475 | error); | |
1476 | return error; | |
1477 | } | |
1478 | ||
1479 | ts->keep_power_in_suspend = true; | |
afe10358 DT |
1480 | } |
1481 | ||
1482 | error = elants_i2c_power_on(ts); | |
1483 | if (error) | |
1484 | return error; | |
1485 | ||
1486 | error = devm_add_action(&client->dev, elants_i2c_power_off, ts); | |
1487 | if (error) { | |
1488 | dev_err(&client->dev, | |
1489 | "failed to install power off action: %d\n", error); | |
1490 | elants_i2c_power_off(ts); | |
1491 | return error; | |
1492 | } | |
1493 | ||
1494 | /* Make sure there is something at this address */ | |
1495 | if (i2c_smbus_xfer(client->adapter, client->addr, 0, | |
1496 | I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) { | |
1497 | dev_err(&client->dev, "nothing at this address\n"); | |
1498 | return -ENXIO; | |
1499 | } | |
1500 | ||
66aee900 SL |
1501 | error = elants_i2c_initialize(ts); |
1502 | if (error) { | |
1503 | dev_err(&client->dev, "failed to initialize: %d\n", error); | |
1504 | return error; | |
1505 | } | |
1506 | ||
1507 | ts->input = devm_input_allocate_device(&client->dev); | |
1508 | if (!ts->input) { | |
1509 | dev_err(&client->dev, "Failed to allocate input device\n"); | |
1510 | return -ENOMEM; | |
1511 | } | |
1512 | ||
1513 | ts->input->name = "Elan Touchscreen"; | |
1514 | ts->input->id.bustype = BUS_I2C; | |
1515 | ||
66aee900 | 1516 | /* Multitouch input params setup */ |
66aee900 SL |
1517 | |
1518 | input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->x_max, 0, 0); | |
1519 | input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->y_max, 0, 0); | |
1520 | input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); | |
1521 | input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0); | |
f27ad893 JC |
1522 | input_set_abs_params(ts->input, ABS_MT_TOOL_TYPE, |
1523 | 0, MT_TOOL_PALM, 0, 0); | |
9517b95b MM |
1524 | |
1525 | touchscreen_parse_properties(ts->input, true, &ts->prop); | |
1526 | ||
781bab32 | 1527 | if (ts->chip_id == EKTF3624 && ts->phy_x && ts->phy_y) { |
9517b95b MM |
1528 | /* calculate resolution from size */ |
1529 | ts->x_res = DIV_ROUND_CLOSEST(ts->prop.max_x, ts->phy_x); | |
1530 | ts->y_res = DIV_ROUND_CLOSEST(ts->prop.max_y, ts->phy_y); | |
1531 | } | |
1532 | ||
66aee900 SL |
1533 | input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res); |
1534 | input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res); | |
56cfe6f8 | 1535 | input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, ts->major_res); |
66aee900 | 1536 | |
6def17b1 MM |
1537 | error = input_mt_init_slots(ts->input, MAX_CONTACT_NUM, |
1538 | INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); | |
1539 | if (error) { | |
1540 | dev_err(&client->dev, | |
1541 | "failed to initialize MT slots: %d\n", error); | |
1542 | return error; | |
1543 | } | |
1544 | ||
66aee900 SL |
1545 | error = input_register_device(ts->input); |
1546 | if (error) { | |
1547 | dev_err(&client->dev, | |
1548 | "unable to register input device: %d\n", error); | |
1549 | return error; | |
1550 | } | |
1551 | ||
1552 | /* | |
4c83c071 DT |
1553 | * Platform code (ACPI, DTS) should normally set up interrupt |
1554 | * for us, but in case it did not let's fall back to using falling | |
1555 | * edge to be compatible with older Chromebooks. | |
66aee900 | 1556 | */ |
4c83c071 DT |
1557 | irqflags = irq_get_trigger_type(client->irq); |
1558 | if (!irqflags) | |
1559 | irqflags = IRQF_TRIGGER_FALLING; | |
66aee900 SL |
1560 | |
1561 | error = devm_request_threaded_irq(&client->dev, client->irq, | |
1562 | NULL, elants_i2c_irq, | |
1563 | irqflags | IRQF_ONESHOT, | |
1564 | client->name, ts); | |
1565 | if (error) { | |
1566 | dev_err(&client->dev, "Failed to register interrupt\n"); | |
1567 | return error; | |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * Systems using device tree should set up wakeup via DTS, | |
1572 | * the rest will configure device as wakeup source by default. | |
1573 | */ | |
1574 | if (!client->dev.of_node) | |
1575 | device_init_wakeup(&client->dev, true); | |
1576 | ||
8db69a9a | 1577 | error = devm_device_add_group(&client->dev, &elants_attribute_group); |
66aee900 SL |
1578 | if (error) { |
1579 | dev_err(&client->dev, "failed to create sysfs attributes: %d\n", | |
1580 | error); | |
1581 | return error; | |
1582 | } | |
1583 | ||
66aee900 SL |
1584 | return 0; |
1585 | } | |
1586 | ||
1587 | static int __maybe_unused elants_i2c_suspend(struct device *dev) | |
1588 | { | |
1589 | struct i2c_client *client = to_i2c_client(dev); | |
1590 | struct elants_data *ts = i2c_get_clientdata(client); | |
c18b443c MM |
1591 | const u8 set_sleep_cmd[] = { |
1592 | CMD_HEADER_WRITE, E_POWER_STATE_SLEEP, 0x00, 0x01 | |
1593 | }; | |
66aee900 SL |
1594 | int retry_cnt; |
1595 | int error; | |
1596 | ||
1597 | /* Command not support in IAP recovery mode */ | |
1598 | if (ts->iap_mode != ELAN_IAP_OPERATIONAL) | |
1599 | return -EBUSY; | |
1600 | ||
1601 | disable_irq(client->irq); | |
1602 | ||
478e5ed1 JC |
1603 | if (device_may_wakeup(dev)) { |
1604 | /* | |
1605 | * The device will automatically enter idle mode | |
1606 | * that has reduced power consumption. | |
1607 | */ | |
1608 | ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0); | |
1609 | } else if (ts->keep_power_in_suspend) { | |
afe10358 DT |
1610 | for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { |
1611 | error = elants_i2c_send(client, set_sleep_cmd, | |
1612 | sizeof(set_sleep_cmd)); | |
1613 | if (!error) | |
1614 | break; | |
66aee900 | 1615 | |
afe10358 DT |
1616 | dev_err(&client->dev, |
1617 | "suspend command failed: %d\n", error); | |
1618 | } | |
afe10358 DT |
1619 | } else { |
1620 | elants_i2c_power_off(ts); | |
1621 | } | |
66aee900 SL |
1622 | |
1623 | return 0; | |
1624 | } | |
1625 | ||
1626 | static int __maybe_unused elants_i2c_resume(struct device *dev) | |
1627 | { | |
1628 | struct i2c_client *client = to_i2c_client(dev); | |
1629 | struct elants_data *ts = i2c_get_clientdata(client); | |
c18b443c MM |
1630 | const u8 set_active_cmd[] = { |
1631 | CMD_HEADER_WRITE, E_POWER_STATE_RESUME, 0x00, 0x01 | |
1632 | }; | |
66aee900 SL |
1633 | int retry_cnt; |
1634 | int error; | |
1635 | ||
478e5ed1 JC |
1636 | if (device_may_wakeup(dev)) { |
1637 | if (ts->wake_irq_enabled) | |
1638 | disable_irq_wake(client->irq); | |
1639 | elants_i2c_sw_reset(client); | |
1640 | } else if (ts->keep_power_in_suspend) { | |
afe10358 DT |
1641 | for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { |
1642 | error = elants_i2c_send(client, set_active_cmd, | |
1643 | sizeof(set_active_cmd)); | |
1644 | if (!error) | |
1645 | break; | |
66aee900 | 1646 | |
afe10358 DT |
1647 | dev_err(&client->dev, |
1648 | "resume command failed: %d\n", error); | |
1649 | } | |
1650 | } else { | |
1651 | elants_i2c_power_on(ts); | |
1652 | elants_i2c_initialize(ts); | |
66aee900 SL |
1653 | } |
1654 | ||
1655 | ts->state = ELAN_STATE_NORMAL; | |
1656 | enable_irq(client->irq); | |
1657 | ||
1658 | return 0; | |
1659 | } | |
1660 | ||
1661 | static SIMPLE_DEV_PM_OPS(elants_i2c_pm_ops, | |
1662 | elants_i2c_suspend, elants_i2c_resume); | |
1663 | ||
1664 | static const struct i2c_device_id elants_i2c_id[] = { | |
9517b95b MM |
1665 | { DEVICE_NAME, EKTH3500 }, |
1666 | { "ekth3500", EKTH3500 }, | |
1667 | { "ektf3624", EKTF3624 }, | |
66aee900 SL |
1668 | { } |
1669 | }; | |
1670 | MODULE_DEVICE_TABLE(i2c, elants_i2c_id); | |
1671 | ||
1672 | #ifdef CONFIG_ACPI | |
1673 | static const struct acpi_device_id elants_acpi_id[] = { | |
9517b95b | 1674 | { "ELAN0001", EKTH3500 }, |
66aee900 SL |
1675 | { } |
1676 | }; | |
1677 | MODULE_DEVICE_TABLE(acpi, elants_acpi_id); | |
1678 | #endif | |
1679 | ||
1680 | #ifdef CONFIG_OF | |
1681 | static const struct of_device_id elants_of_match[] = { | |
b9c0ebb8 TI |
1682 | { .compatible = "elan,ekth3500", .data = (void *)EKTH3500 }, |
1683 | { .compatible = "elan,ektf3624", .data = (void *)EKTF3624 }, | |
66aee900 SL |
1684 | { /* sentinel */ } |
1685 | }; | |
1686 | MODULE_DEVICE_TABLE(of, elants_of_match); | |
1687 | #endif | |
1688 | ||
1689 | static struct i2c_driver elants_i2c_driver = { | |
45a4b683 | 1690 | .probe_new = elants_i2c_probe, |
66aee900 SL |
1691 | .id_table = elants_i2c_id, |
1692 | .driver = { | |
1693 | .name = DEVICE_NAME, | |
66aee900 SL |
1694 | .pm = &elants_i2c_pm_ops, |
1695 | .acpi_match_table = ACPI_PTR(elants_acpi_id), | |
1696 | .of_match_table = of_match_ptr(elants_of_match), | |
9f6a07b6 | 1697 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
66aee900 SL |
1698 | }, |
1699 | }; | |
1700 | module_i2c_driver(elants_i2c_driver); | |
1701 | ||
1702 | MODULE_AUTHOR("Scott Liu <scott.liu@emc.com.tw>"); | |
1703 | MODULE_DESCRIPTION("Elan I2c Touchscreen driver"); | |
66aee900 | 1704 | MODULE_LICENSE("GPL"); |