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