projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Input: atmel_mxt_ts - add additional bootloader addresses
[deliverable/linux.git] / drivers / input / touchscreen / atmel_mxt_ts.c
1 /*
2 * Atmel maXTouch Touchscreen driver
3 *
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Copyright (C) 2012 Google, Inc.
6 *
7 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 */
15
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/completion.h>
19 #include <linux/delay.h>
20 #include <linux/firmware.h>
21 #include <linux/i2c.h>
22 #include <linux/i2c/atmel_mxt_ts.h>
23 #include <linux/input/mt.h>
24 #include <linux/interrupt.h>
25 #include <linux/slab.h>
26
27 /* Version */
28 #define MXT_VER_20 20
29 #define MXT_VER_21 21
30 #define MXT_VER_22 22
31
32 /* Firmware */
33 #define MXT_FW_NAME "maxtouch.fw"
34
35 /* Registers */
36 #define MXT_INFO 0x00
37 #define MXT_FAMILY_ID 0x00
38 #define MXT_VARIANT_ID 0x01
39 #define MXT_VERSION 0x02
40 #define MXT_BUILD 0x03
41 #define MXT_MATRIX_X_SIZE 0x04
42 #define MXT_MATRIX_Y_SIZE 0x05
43 #define MXT_OBJECT_NUM 0x06
44 #define MXT_OBJECT_START 0x07
45
46 #define MXT_OBJECT_SIZE 6
47
48 /* Object types */
49 #define MXT_DEBUG_DIAGNOSTIC_T37 37
50 #define MXT_GEN_MESSAGE_T5 5
51 #define MXT_GEN_COMMAND_T6 6
52 #define MXT_GEN_POWER_T7 7
53 #define MXT_GEN_ACQUIRE_T8 8
54 #define MXT_GEN_DATASOURCE_T53 53
55 #define MXT_TOUCH_MULTI_T9 9
56 #define MXT_TOUCH_KEYARRAY_T15 15
57 #define MXT_TOUCH_PROXIMITY_T23 23
58 #define MXT_TOUCH_PROXKEY_T52 52
59 #define MXT_PROCI_GRIPFACE_T20 20
60 #define MXT_PROCG_NOISE_T22 22
61 #define MXT_PROCI_ONETOUCH_T24 24
62 #define MXT_PROCI_TWOTOUCH_T27 27
63 #define MXT_PROCI_GRIP_T40 40
64 #define MXT_PROCI_PALM_T41 41
65 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
66 #define MXT_PROCI_STYLUS_T47 47
67 #define MXT_PROCG_NOISESUPPRESSION_T48 48
68 #define MXT_SPT_COMMSCONFIG_T18 18
69 #define MXT_SPT_GPIOPWM_T19 19
70 #define MXT_SPT_SELFTEST_T25 25
71 #define MXT_SPT_CTECONFIG_T28 28
72 #define MXT_SPT_USERDATA_T38 38
73 #define MXT_SPT_DIGITIZER_T43 43
74 #define MXT_SPT_MESSAGECOUNT_T44 44
75 #define MXT_SPT_CTECONFIG_T46 46
76
77 /* MXT_GEN_COMMAND_T6 field */
78 #define MXT_COMMAND_RESET 0
79 #define MXT_COMMAND_BACKUPNV 1
80 #define MXT_COMMAND_CALIBRATE 2
81 #define MXT_COMMAND_REPORTALL 3
82 #define MXT_COMMAND_DIAGNOSTIC 5
83
84 /* Define for T6 status byte */
85 #define MXT_T6_STATUS_RESET (1 << 7)
86
87 /* MXT_GEN_POWER_T7 field */
88 #define MXT_POWER_IDLEACQINT 0
89 #define MXT_POWER_ACTVACQINT 1
90 #define MXT_POWER_ACTV2IDLETO 2
91
92 /* MXT_GEN_ACQUIRE_T8 field */
93 #define MXT_ACQUIRE_CHRGTIME 0
94 #define MXT_ACQUIRE_TCHDRIFT 2
95 #define MXT_ACQUIRE_DRIFTST 3
96 #define MXT_ACQUIRE_TCHAUTOCAL 4
97 #define MXT_ACQUIRE_SYNC 5
98 #define MXT_ACQUIRE_ATCHCALST 6
99 #define MXT_ACQUIRE_ATCHCALSTHR 7
100
101 /* MXT_TOUCH_MULTI_T9 field */
102 #define MXT_TOUCH_CTRL 0
103 #define MXT_TOUCH_XORIGIN 1
104 #define MXT_TOUCH_YORIGIN 2
105 #define MXT_TOUCH_XSIZE 3
106 #define MXT_TOUCH_YSIZE 4
107 #define MXT_TOUCH_BLEN 6
108 #define MXT_TOUCH_TCHTHR 7
109 #define MXT_TOUCH_TCHDI 8
110 #define MXT_TOUCH_ORIENT 9
111 #define MXT_TOUCH_MOVHYSTI 11
112 #define MXT_TOUCH_MOVHYSTN 12
113 #define MXT_TOUCH_NUMTOUCH 14
114 #define MXT_TOUCH_MRGHYST 15
115 #define MXT_TOUCH_MRGTHR 16
116 #define MXT_TOUCH_AMPHYST 17
117 #define MXT_TOUCH_XRANGE_LSB 18
118 #define MXT_TOUCH_XRANGE_MSB 19
119 #define MXT_TOUCH_YRANGE_LSB 20
120 #define MXT_TOUCH_YRANGE_MSB 21
121 #define MXT_TOUCH_XLOCLIP 22
122 #define MXT_TOUCH_XHICLIP 23
123 #define MXT_TOUCH_YLOCLIP 24
124 #define MXT_TOUCH_YHICLIP 25
125 #define MXT_TOUCH_XEDGECTRL 26
126 #define MXT_TOUCH_XEDGEDIST 27
127 #define MXT_TOUCH_YEDGECTRL 28
128 #define MXT_TOUCH_YEDGEDIST 29
129 #define MXT_TOUCH_JUMPLIMIT 30
130
131 /* MXT_PROCI_GRIPFACE_T20 field */
132 #define MXT_GRIPFACE_CTRL 0
133 #define MXT_GRIPFACE_XLOGRIP 1
134 #define MXT_GRIPFACE_XHIGRIP 2
135 #define MXT_GRIPFACE_YLOGRIP 3
136 #define MXT_GRIPFACE_YHIGRIP 4
137 #define MXT_GRIPFACE_MAXTCHS 5
138 #define MXT_GRIPFACE_SZTHR1 7
139 #define MXT_GRIPFACE_SZTHR2 8
140 #define MXT_GRIPFACE_SHPTHR1 9
141 #define MXT_GRIPFACE_SHPTHR2 10
142 #define MXT_GRIPFACE_SUPEXTTO 11
143
144 /* MXT_PROCI_NOISE field */
145 #define MXT_NOISE_CTRL 0
146 #define MXT_NOISE_OUTFLEN 1
147 #define MXT_NOISE_GCAFUL_LSB 3
148 #define MXT_NOISE_GCAFUL_MSB 4
149 #define MXT_NOISE_GCAFLL_LSB 5
150 #define MXT_NOISE_GCAFLL_MSB 6
151 #define MXT_NOISE_ACTVGCAFVALID 7
152 #define MXT_NOISE_NOISETHR 8
153 #define MXT_NOISE_FREQHOPSCALE 10
154 #define MXT_NOISE_FREQ0 11
155 #define MXT_NOISE_FREQ1 12
156 #define MXT_NOISE_FREQ2 13
157 #define MXT_NOISE_FREQ3 14
158 #define MXT_NOISE_FREQ4 15
159 #define MXT_NOISE_IDLEGCAFVALID 16
160
161 /* MXT_SPT_COMMSCONFIG_T18 */
162 #define MXT_COMMS_CTRL 0
163 #define MXT_COMMS_CMD 1
164
165 /* MXT_SPT_CTECONFIG_T28 field */
166 #define MXT_CTE_CTRL 0
167 #define MXT_CTE_CMD 1
168 #define MXT_CTE_MODE 2
169 #define MXT_CTE_IDLEGCAFDEPTH 3
170 #define MXT_CTE_ACTVGCAFDEPTH 4
171 #define MXT_CTE_VOLTAGE 5
172
173 #define MXT_VOLTAGE_DEFAULT 2700000
174 #define MXT_VOLTAGE_STEP 10000
175
176 /* Define for MXT_GEN_COMMAND_T6 */
177 #define MXT_BOOT_VALUE 0xa5
178 #define MXT_RESET_VALUE 0x01
179 #define MXT_BACKUP_VALUE 0x55
180
181 /* Delay times */
182 #define MXT_BACKUP_TIME 50 /* msec */
183 #define MXT_RESET_TIME 200 /* msec */
184 #define MXT_RESET_TIMEOUT 3000 /* msec */
185 #define MXT_CRC_TIMEOUT 1000 /* msec */
186 #define MXT_FW_RESET_TIME 3000 /* msec */
187 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
188
189 /* Command to unlock bootloader */
190 #define MXT_UNLOCK_CMD_MSB 0xaa
191 #define MXT_UNLOCK_CMD_LSB 0xdc
192
193 /* Bootloader mode status */
194 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
195 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
196 #define MXT_FRAME_CRC_CHECK 0x02
197 #define MXT_FRAME_CRC_FAIL 0x03
198 #define MXT_FRAME_CRC_PASS 0x04
199 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
200 #define MXT_BOOT_STATUS_MASK 0x3f
201
202 /* Touch status */
203 #define MXT_UNGRIP (1 << 0)
204 #define MXT_SUPPRESS (1 << 1)
205 #define MXT_AMP (1 << 2)
206 #define MXT_VECTOR (1 << 3)
207 #define MXT_MOVE (1 << 4)
208 #define MXT_RELEASE (1 << 5)
209 #define MXT_PRESS (1 << 6)
210 #define MXT_DETECT (1 << 7)
211
212 /* Touch orient bits */
213 #define MXT_XY_SWITCH (1 << 0)
214 #define MXT_X_INVERT (1 << 1)
215 #define MXT_Y_INVERT (1 << 2)
216
217 /* Touchscreen absolute values */
218 #define MXT_MAX_AREA 0xff
219
220 #define MXT_PIXELS_PER_MM 20
221
222 struct mxt_info {
223 u8 family_id;
224 u8 variant_id;
225 u8 version;
226 u8 build;
227 u8 matrix_xsize;
228 u8 matrix_ysize;
229 u8 object_num;
230 };
231
232 struct mxt_object {
233 u8 type;
234 u16 start_address;
235 u8 size_minus_one;
236 u8 instances_minus_one;
237 u8 num_report_ids;
238 } __packed;
239
240 struct mxt_message {
241 u8 reportid;
242 u8 message[7];
243 };
244
245 /* Each client has this additional data */
246 struct mxt_data {
247 struct i2c_client *client;
248 struct input_dev *input_dev;
249 char phys[64]; /* device physical location */
250 const struct mxt_platform_data *pdata;
251 struct mxt_object *object_table;
252 struct mxt_info info;
253 unsigned int irq;
254 unsigned int max_x;
255 unsigned int max_y;
256 bool in_bootloader;
257 u32 config_crc;
258 u8 bootloader_addr;
259
260 /* Cached parameters from object table */
261 u8 T6_reportid;
262 u16 T6_address;
263 u8 T9_reportid_min;
264 u8 T9_reportid_max;
265 u8 T19_reportid;
266
267 /* for fw update in bootloader */
268 struct completion bl_completion;
269
270 /* for reset handling */
271 struct completion reset_completion;
272
273 /* for config update handling */
274 struct completion crc_completion;
275 };
276
277 static size_t mxt_obj_size(const struct mxt_object *obj)
278 {
279 return obj->size_minus_one + 1;
280 }
281
282 static size_t mxt_obj_instances(const struct mxt_object *obj)
283 {
284 return obj->instances_minus_one + 1;
285 }
286
287 static bool mxt_object_readable(unsigned int type)
288 {
289 switch (type) {
290 case MXT_GEN_COMMAND_T6:
291 case MXT_GEN_POWER_T7:
292 case MXT_GEN_ACQUIRE_T8:
293 case MXT_GEN_DATASOURCE_T53:
294 case MXT_TOUCH_MULTI_T9:
295 case MXT_TOUCH_KEYARRAY_T15:
296 case MXT_TOUCH_PROXIMITY_T23:
297 case MXT_TOUCH_PROXKEY_T52:
298 case MXT_PROCI_GRIPFACE_T20:
299 case MXT_PROCG_NOISE_T22:
300 case MXT_PROCI_ONETOUCH_T24:
301 case MXT_PROCI_TWOTOUCH_T27:
302 case MXT_PROCI_GRIP_T40:
303 case MXT_PROCI_PALM_T41:
304 case MXT_PROCI_TOUCHSUPPRESSION_T42:
305 case MXT_PROCI_STYLUS_T47:
306 case MXT_PROCG_NOISESUPPRESSION_T48:
307 case MXT_SPT_COMMSCONFIG_T18:
308 case MXT_SPT_GPIOPWM_T19:
309 case MXT_SPT_SELFTEST_T25:
310 case MXT_SPT_CTECONFIG_T28:
311 case MXT_SPT_USERDATA_T38:
312 case MXT_SPT_DIGITIZER_T43:
313 case MXT_SPT_CTECONFIG_T46:
314 return true;
315 default:
316 return false;
317 }
318 }
319
320 static bool mxt_object_writable(unsigned int type)
321 {
322 switch (type) {
323 case MXT_GEN_COMMAND_T6:
324 case MXT_GEN_POWER_T7:
325 case MXT_GEN_ACQUIRE_T8:
326 case MXT_TOUCH_MULTI_T9:
327 case MXT_TOUCH_KEYARRAY_T15:
328 case MXT_TOUCH_PROXIMITY_T23:
329 case MXT_TOUCH_PROXKEY_T52:
330 case MXT_PROCI_GRIPFACE_T20:
331 case MXT_PROCG_NOISE_T22:
332 case MXT_PROCI_ONETOUCH_T24:
333 case MXT_PROCI_TWOTOUCH_T27:
334 case MXT_PROCI_GRIP_T40:
335 case MXT_PROCI_PALM_T41:
336 case MXT_PROCI_TOUCHSUPPRESSION_T42:
337 case MXT_PROCI_STYLUS_T47:
338 case MXT_PROCG_NOISESUPPRESSION_T48:
339 case MXT_SPT_COMMSCONFIG_T18:
340 case MXT_SPT_GPIOPWM_T19:
341 case MXT_SPT_SELFTEST_T25:
342 case MXT_SPT_CTECONFIG_T28:
343 case MXT_SPT_DIGITIZER_T43:
344 case MXT_SPT_CTECONFIG_T46:
345 return true;
346 default:
347 return false;
348 }
349 }
350
351 static void mxt_dump_message(struct device *dev,
352 struct mxt_message *message)
353 {
354 dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
355 message->reportid, 7, message->message);
356 }
357
358 static int mxt_wait_for_completion(struct mxt_data *data,
359 struct completion *comp,
360 unsigned int timeout_ms)
361 {
362 struct device *dev = &data->client->dev;
363 unsigned long timeout = msecs_to_jiffies(timeout_ms);
364 long ret;
365
366 ret = wait_for_completion_interruptible_timeout(comp, timeout);
367 if (ret < 0) {
368 return ret;
369 } else if (ret == 0) {
370 dev_err(dev, "Wait for completion timed out.\n");
371 return -ETIMEDOUT;
372 }
373 return 0;
374 }
375
376 static int mxt_bootloader_read(struct mxt_data *data,
377 u8 *val, unsigned int count)
378 {
379 int ret;
380 struct i2c_msg msg;
381
382 msg.addr = data->bootloader_addr;
383 msg.flags = data->client->flags & I2C_M_TEN;
384 msg.flags |= I2C_M_RD;
385 msg.len = count;
386 msg.buf = val;
387
388 ret = i2c_transfer(data->client->adapter, &msg, 1);
389
390 if (ret == 1) {
391 ret = 0;
392 } else {
393 ret = ret < 0 ? ret : -EIO;
394 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
395 __func__, ret);
396 }
397
398 return ret;
399 }
400
401 static int mxt_bootloader_write(struct mxt_data *data,
402 const u8 * const val, unsigned int count)
403 {
404 int ret;
405 struct i2c_msg msg;
406
407 msg.addr = data->bootloader_addr;
408 msg.flags = data->client->flags & I2C_M_TEN;
409 msg.len = count;
410 msg.buf = (u8 *)val;
411
412 ret = i2c_transfer(data->client->adapter, &msg, 1);
413 if (ret == 1) {
414 ret = 0;
415 } else {
416 ret = ret < 0 ? ret : -EIO;
417 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
418 __func__, ret);
419 }
420
421 return ret;
422 }
423
424 static int mxt_lookup_bootloader_address(struct mxt_data *data)
425 {
426 u8 appmode = data->client->addr;
427 u8 bootloader;
428
429 switch (appmode) {
430 case 0x4a:
431 case 0x4b:
432 case 0x4c:
433 case 0x4d:
434 case 0x5a:
435 case 0x5b:
436 bootloader = appmode - 0x26;
437 break;
438 default:
439 dev_err(&data->client->dev,
440 "Appmode i2c address 0x%02x not found\n",
441 appmode);
442 return -EINVAL;
443 }
444
445 data->bootloader_addr = bootloader;
446 return 0;
447 }
448
449 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state)
450 {
451 struct device *dev = &data->client->dev;
452 u8 val;
453 int ret;
454
455 recheck:
456 if (state != MXT_WAITING_BOOTLOAD_CMD) {
457 /*
458 * In application update mode, the interrupt
459 * line signals state transitions. We must wait for the
460 * CHG assertion before reading the status byte.
461 * Once the status byte has been read, the line is deasserted.
462 */
463 ret = mxt_wait_for_completion(data, &data->bl_completion,
464 MXT_FW_CHG_TIMEOUT);
465 if (ret) {
466 /*
467 * TODO: handle -ERESTARTSYS better by terminating
468 * fw update process before returning to userspace
469 * by writing length 0x000 to device (iff we are in
470 * WAITING_FRAME_DATA state).
471 */
472 dev_err(dev, "Update wait error %d\n", ret);
473 return ret;
474 }
475 }
476
477 ret = mxt_bootloader_read(data, &val, 1);
478 if (ret)
479 return ret;
480
481 switch (state) {
482 case MXT_WAITING_BOOTLOAD_CMD:
483 case MXT_WAITING_FRAME_DATA:
484 val &= ~MXT_BOOT_STATUS_MASK;
485 break;
486 case MXT_FRAME_CRC_PASS:
487 if (val == MXT_FRAME_CRC_CHECK)
488 goto recheck;
489 break;
490 default:
491 return -EINVAL;
492 }
493
494 if (val != state) {
495 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
496 val, state);
497 return -EINVAL;
498 }
499
500 return 0;
501 }
502
503 static int mxt_unlock_bootloader(struct mxt_data *data)
504 {
505 int ret;
506 u8 buf[2];
507
508 buf[0] = MXT_UNLOCK_CMD_LSB;
509 buf[1] = MXT_UNLOCK_CMD_MSB;
510
511 ret = mxt_bootloader_write(data, buf, 2);
512 if (ret)
513 return ret;
514
515 return 0;
516 }
517
518 static int __mxt_read_reg(struct i2c_client *client,
519 u16 reg, u16 len, void *val)
520 {
521 struct i2c_msg xfer[2];
522 u8 buf[2];
523 int ret;
524
525 buf[0] = reg & 0xff;
526 buf[1] = (reg >> 8) & 0xff;
527
528 /* Write register */
529 xfer[0].addr = client->addr;
530 xfer[0].flags = 0;
531 xfer[0].len = 2;
532 xfer[0].buf = buf;
533
534 /* Read data */
535 xfer[1].addr = client->addr;
536 xfer[1].flags = I2C_M_RD;
537 xfer[1].len = len;
538 xfer[1].buf = val;
539
540 ret = i2c_transfer(client->adapter, xfer, 2);
541 if (ret == 2) {
542 ret = 0;
543 } else {
544 if (ret >= 0)
545 ret = -EIO;
546 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
547 __func__, ret);
548 }
549
550 return ret;
551 }
552
553 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
554 {
555 return __mxt_read_reg(client, reg, 1, val);
556 }
557
558 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
559 const void *val)
560 {
561 u8 *buf;
562 size_t count;
563 int ret;
564
565 count = len + 2;
566 buf = kmalloc(count, GFP_KERNEL);
567 if (!buf)
568 return -ENOMEM;
569
570 buf[0] = reg & 0xff;
571 buf[1] = (reg >> 8) & 0xff;
572 memcpy(&buf[2], val, len);
573
574 ret = i2c_master_send(client, buf, count);
575 if (ret == count) {
576 ret = 0;
577 } else {
578 if (ret >= 0)
579 ret = -EIO;
580 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
581 __func__, ret);
582 }
583
584 kfree(buf);
585 return ret;
586 }
587
588 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
589 {
590 return __mxt_write_reg(client, reg, 1, &val);
591 }
592
593 static struct mxt_object *
594 mxt_get_object(struct mxt_data *data, u8 type)
595 {
596 struct mxt_object *object;
597 int i;
598
599 for (i = 0; i < data->info.object_num; i++) {
600 object = data->object_table + i;
601 if (object->type == type)
602 return object;
603 }
604
605 dev_err(&data->client->dev, "Invalid object type T%u\n", type);
606 return NULL;
607 }
608
609 static int mxt_read_message(struct mxt_data *data,
610 struct mxt_message *message)
611 {
612 struct mxt_object *object;
613 u16 reg;
614
615 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
616 if (!object)
617 return -EINVAL;
618
619 reg = object->start_address;
620 return __mxt_read_reg(data->client, reg,
621 sizeof(struct mxt_message), message);
622 }
623
624 static int mxt_write_object(struct mxt_data *data,
625 u8 type, u8 offset, u8 val)
626 {
627 struct mxt_object *object;
628 u16 reg;
629
630 object = mxt_get_object(data, type);
631 if (!object || offset >= mxt_obj_size(object))
632 return -EINVAL;
633
634 reg = object->start_address;
635 return mxt_write_reg(data->client, reg + offset, val);
636 }
637
638 static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
639 {
640 struct input_dev *input = data->input_dev;
641 const struct mxt_platform_data *pdata = data->pdata;
642 bool button;
643 int i;
644
645 /* Active-low switch */
646 for (i = 0; i < pdata->t19_num_keys; i++) {
647 if (pdata->t19_keymap[i] == KEY_RESERVED)
648 continue;
649 button = !(message->message[0] & (1 << i));
650 input_report_key(input, pdata->t19_keymap[i], button);
651 }
652 }
653
654 static void mxt_input_touchevent(struct mxt_data *data,
655 struct mxt_message *message, int id)
656 {
657 struct device *dev = &data->client->dev;
658 u8 status = message->message[0];
659 struct input_dev *input_dev = data->input_dev;
660 int x;
661 int y;
662 int area;
663 int pressure;
664
665 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
666 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
667 if (data->max_x < 1024)
668 x = x >> 2;
669 if (data->max_y < 1024)
670 y = y >> 2;
671
672 area = message->message[4];
673 pressure = message->message[5];
674
675 dev_dbg(dev,
676 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
677 id,
678 (status & MXT_DETECT) ? 'D' : '.',
679 (status & MXT_PRESS) ? 'P' : '.',
680 (status & MXT_RELEASE) ? 'R' : '.',
681 (status & MXT_MOVE) ? 'M' : '.',
682 (status & MXT_VECTOR) ? 'V' : '.',
683 (status & MXT_AMP) ? 'A' : '.',
684 (status & MXT_SUPPRESS) ? 'S' : '.',
685 (status & MXT_UNGRIP) ? 'U' : '.',
686 x, y, area, pressure);
687
688 input_mt_slot(input_dev, id);
689 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
690 status & MXT_DETECT);
691
692 if (status & MXT_DETECT) {
693 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
694 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
695 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
696 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
697 }
698 }
699
700 static u16 mxt_extract_T6_csum(const u8 *csum)
701 {
702 return csum[0] | (csum[1] << 8) | (csum[2] << 16);
703 }
704
705 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
706 {
707 u8 id = msg->reportid;
708 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
709 }
710
711 static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data)
712 {
713 struct mxt_message message;
714 const u8 *payload = &message.message[0];
715 struct device *dev = &data->client->dev;
716 u8 reportid;
717 bool update_input = false;
718 u32 crc;
719
720 do {
721 if (mxt_read_message(data, &message)) {
722 dev_err(dev, "Failed to read message\n");
723 return IRQ_NONE;
724 }
725
726 reportid = message.reportid;
727
728 if (reportid == data->T6_reportid) {
729 u8 status = payload[0];
730
731 crc = mxt_extract_T6_csum(&payload[1]);
732 if (crc != data->config_crc) {
733 data->config_crc = crc;
734 complete(&data->crc_completion);
735 }
736
737 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
738 status, data->config_crc);
739
740 if (status & MXT_T6_STATUS_RESET)
741 complete(&data->reset_completion);
742 } else if (mxt_is_T9_message(data, &message)) {
743 int id = reportid - data->T9_reportid_min;
744 mxt_input_touchevent(data, &message, id);
745 update_input = true;
746 } else if (message.reportid == data->T19_reportid) {
747 mxt_input_button(data, &message);
748 update_input = true;
749 } else {
750 mxt_dump_message(dev, &message);
751 }
752 } while (reportid != 0xff);
753
754 if (update_input) {
755 input_mt_report_pointer_emulation(data->input_dev, false);
756 input_sync(data->input_dev);
757 }
758
759 return IRQ_HANDLED;
760 }
761
762 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
763 {
764 struct mxt_data *data = dev_id;
765
766 if (data->in_bootloader) {
767 /* bootloader state transition completion */
768 complete(&data->bl_completion);
769 return IRQ_HANDLED;
770 }
771
772 return mxt_process_messages_until_invalid(data);
773 }
774
775 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
776 u8 value, bool wait)
777 {
778 u16 reg;
779 u8 command_register;
780 int timeout_counter = 0;
781 int ret;
782
783 reg = data->T6_address + cmd_offset;
784
785 ret = mxt_write_reg(data->client, reg, value);
786 if (ret)
787 return ret;
788
789 if (!wait)
790 return 0;
791
792 do {
793 msleep(20);
794 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
795 if (ret)
796 return ret;
797 } while (command_register != 0 && timeout_counter++ <= 100);
798
799 if (timeout_counter > 100) {
800 dev_err(&data->client->dev, "Command failed!\n");
801 return -EIO;
802 }
803
804 return 0;
805 }
806
807 static int mxt_soft_reset(struct mxt_data *data)
808 {
809 struct device *dev = &data->client->dev;
810 int ret = 0;
811
812 dev_info(dev, "Resetting chip\n");
813
814 reinit_completion(&data->reset_completion);
815
816 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
817 if (ret)
818 return ret;
819
820 ret = mxt_wait_for_completion(data, &data->reset_completion,
821 MXT_RESET_TIMEOUT);
822 if (ret)
823 return ret;
824
825 return 0;
826 }
827
828 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
829 {
830 /*
831 * On failure, CRC is set to 0 and config will always be
832 * downloaded.
833 */
834 data->config_crc = 0;
835 reinit_completion(&data->crc_completion);
836
837 mxt_t6_command(data, cmd, value, true);
838
839 /*
840 * Wait for crc message. On failure, CRC is set to 0 and config will
841 * always be downloaded.
842 */
843 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
844 }
845
846 static int mxt_check_reg_init(struct mxt_data *data)
847 {
848 const struct mxt_platform_data *pdata = data->pdata;
849 struct mxt_object *object;
850 struct device *dev = &data->client->dev;
851 int index = 0;
852 int i, size;
853 int ret;
854
855 if (!pdata->config) {
856 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
857 return 0;
858 }
859
860 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
861
862 if (data->config_crc == pdata->config_crc) {
863 dev_info(dev, "Config CRC 0x%06X: OK\n", data->config_crc);
864 return 0;
865 }
866
867 dev_info(dev, "Config CRC 0x%06X: does not match 0x%06X\n",
868 data->config_crc, pdata->config_crc);
869
870 for (i = 0; i < data->info.object_num; i++) {
871 object = data->object_table + i;
872
873 if (!mxt_object_writable(object->type))
874 continue;
875
876 size = mxt_obj_size(object) * mxt_obj_instances(object);
877 if (index + size > pdata->config_length) {
878 dev_err(dev, "Not enough config data!\n");
879 return -EINVAL;
880 }
881
882 ret = __mxt_write_reg(data->client, object->start_address,
883 size, &pdata->config[index]);
884 if (ret)
885 return ret;
886 index += size;
887 }
888
889 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
890
891 ret = mxt_soft_reset(data);
892 if (ret)
893 return ret;
894
895 dev_info(dev, "Config successfully updated\n");
896
897 return 0;
898 }
899
900 static int mxt_make_highchg(struct mxt_data *data)
901 {
902 struct device *dev = &data->client->dev;
903 struct mxt_message message;
904 int count = 10;
905 int error;
906
907 /* Read dummy message to make high CHG pin */
908 do {
909 error = mxt_read_message(data, &message);
910 if (error)
911 return error;
912 } while (message.reportid != 0xff && --count);
913
914 if (!count) {
915 dev_err(dev, "CHG pin isn't cleared\n");
916 return -EBUSY;
917 }
918
919 return 0;
920 }
921
922 static int mxt_get_info(struct mxt_data *data)
923 {
924 struct i2c_client *client = data->client;
925 struct mxt_info *info = &data->info;
926 int error;
927
928 /* Read 7-byte info block starting at address 0 */
929 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
930 if (error)
931 return error;
932
933 return 0;
934 }
935
936 static int mxt_get_object_table(struct mxt_data *data)
937 {
938 struct i2c_client *client = data->client;
939 size_t table_size;
940 int error;
941 int i;
942 u8 reportid;
943
944 table_size = data->info.object_num * sizeof(struct mxt_object);
945 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
946 data->object_table);
947 if (error)
948 return error;
949
950 /* Valid Report IDs start counting from 1 */
951 reportid = 1;
952 for (i = 0; i < data->info.object_num; i++) {
953 struct mxt_object *object = data->object_table + i;
954 u8 min_id, max_id;
955
956 le16_to_cpus(&object->start_address);
957
958 if (object->num_report_ids) {
959 min_id = reportid;
960 reportid += object->num_report_ids *
961 mxt_obj_instances(object);
962 max_id = reportid - 1;
963 } else {
964 min_id = 0;
965 max_id = 0;
966 }
967
968 dev_dbg(&data->client->dev,
969 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
970 object->type, object->start_address,
971 mxt_obj_size(object), mxt_obj_instances(object),
972 min_id, max_id);
973
974 switch (object->type) {
975 case MXT_GEN_COMMAND_T6:
976 data->T6_reportid = min_id;
977 data->T6_address = object->start_address;
978 break;
979 case MXT_TOUCH_MULTI_T9:
980 data->T9_reportid_min = min_id;
981 data->T9_reportid_max = max_id;
982 break;
983 case MXT_SPT_GPIOPWM_T19:
984 data->T19_reportid = min_id;
985 break;
986 }
987 }
988
989 return 0;
990 }
991
992 static void mxt_free_object_table(struct mxt_data *data)
993 {
994 kfree(data->object_table);
995 data->object_table = NULL;
996 data->T6_reportid = 0;
997 data->T9_reportid_min = 0;
998 data->T9_reportid_max = 0;
999 data->T19_reportid = 0;
1000 }
1001
1002 static int mxt_initialize(struct mxt_data *data)
1003 {
1004 struct i2c_client *client = data->client;
1005 struct mxt_info *info = &data->info;
1006 int error;
1007 u8 val;
1008
1009 error = mxt_get_info(data);
1010 if (error)
1011 return error;
1012
1013 data->object_table = kcalloc(info->object_num,
1014 sizeof(struct mxt_object),
1015 GFP_KERNEL);
1016 if (!data->object_table) {
1017 dev_err(&client->dev, "Failed to allocate memory\n");
1018 return -ENOMEM;
1019 }
1020
1021 /* Get object table information */
1022 error = mxt_get_object_table(data);
1023 if (error) {
1024 dev_err(&client->dev, "Error %d reading object table\n", error);
1025 goto err_free_object_table;
1026 }
1027
1028 /* Check register init values */
1029 error = mxt_check_reg_init(data);
1030 if (error) {
1031 dev_err(&client->dev, "Error %d initializing configuration\n",
1032 error);
1033 goto err_free_object_table;
1034 }
1035
1036 /* Update matrix size at info struct */
1037 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
1038 if (error)
1039 goto err_free_object_table;
1040 info->matrix_xsize = val;
1041
1042 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
1043 if (error)
1044 goto err_free_object_table;
1045 info->matrix_ysize = val;
1046
1047 dev_info(&client->dev,
1048 "Family: %u Variant: %u Firmware V%u.%u.%02X\n",
1049 info->family_id, info->variant_id, info->version >> 4,
1050 info->version & 0xf, info->build);
1051
1052 dev_info(&client->dev,
1053 "Matrix X Size: %u Matrix Y Size: %u Objects: %u\n",
1054 info->matrix_xsize, info->matrix_ysize,
1055 info->object_num);
1056
1057 return 0;
1058
1059 err_free_object_table:
1060 mxt_free_object_table(data);
1061 return error;
1062 }
1063
1064 static void mxt_calc_resolution(struct mxt_data *data)
1065 {
1066 unsigned int max_x = data->pdata->x_size - 1;
1067 unsigned int max_y = data->pdata->y_size - 1;
1068
1069 if (data->pdata->orient & MXT_XY_SWITCH) {
1070 data->max_x = max_y;
1071 data->max_y = max_x;
1072 } else {
1073 data->max_x = max_x;
1074 data->max_y = max_y;
1075 }
1076 }
1077
1078 /* Firmware Version is returned as Major.Minor.Build */
1079 static ssize_t mxt_fw_version_show(struct device *dev,
1080 struct device_attribute *attr, char *buf)
1081 {
1082 struct mxt_data *data = dev_get_drvdata(dev);
1083 struct mxt_info *info = &data->info;
1084 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
1085 info->version >> 4, info->version & 0xf, info->build);
1086 }
1087
1088 /* Hardware Version is returned as FamilyID.VariantID */
1089 static ssize_t mxt_hw_version_show(struct device *dev,
1090 struct device_attribute *attr, char *buf)
1091 {
1092 struct mxt_data *data = dev_get_drvdata(dev);
1093 struct mxt_info *info = &data->info;
1094 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
1095 info->family_id, info->variant_id);
1096 }
1097
1098 static ssize_t mxt_show_instance(char *buf, int count,
1099 struct mxt_object *object, int instance,
1100 const u8 *val)
1101 {
1102 int i;
1103
1104 if (mxt_obj_instances(object) > 1)
1105 count += scnprintf(buf + count, PAGE_SIZE - count,
1106 "Instance %u\n", instance);
1107
1108 for (i = 0; i < mxt_obj_size(object); i++)
1109 count += scnprintf(buf + count, PAGE_SIZE - count,
1110 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
1111 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
1112
1113 return count;
1114 }
1115
1116 static ssize_t mxt_object_show(struct device *dev,
1117 struct device_attribute *attr, char *buf)
1118 {
1119 struct mxt_data *data = dev_get_drvdata(dev);
1120 struct mxt_object *object;
1121 int count = 0;
1122 int i, j;
1123 int error;
1124 u8 *obuf;
1125
1126 /* Pre-allocate buffer large enough to hold max sized object. */
1127 obuf = kmalloc(256, GFP_KERNEL);
1128 if (!obuf)
1129 return -ENOMEM;
1130
1131 error = 0;
1132 for (i = 0; i < data->info.object_num; i++) {
1133 object = data->object_table + i;
1134
1135 if (!mxt_object_readable(object->type))
1136 continue;
1137
1138 count += scnprintf(buf + count, PAGE_SIZE - count,
1139 "T%u:\n", object->type);
1140
1141 for (j = 0; j < mxt_obj_instances(object); j++) {
1142 u16 size = mxt_obj_size(object);
1143 u16 addr = object->start_address + j * size;
1144
1145 error = __mxt_read_reg(data->client, addr, size, obuf);
1146 if (error)
1147 goto done;
1148
1149 count = mxt_show_instance(buf, count, object, j, obuf);
1150 }
1151 }
1152
1153 done:
1154 kfree(obuf);
1155 return error ?: count;
1156 }
1157
1158 static int mxt_load_fw(struct device *dev, const char *fn)
1159 {
1160 struct mxt_data *data = dev_get_drvdata(dev);
1161 const struct firmware *fw = NULL;
1162 unsigned int frame_size;
1163 unsigned int pos = 0;
1164 int ret;
1165
1166 ret = request_firmware(&fw, fn, dev);
1167 if (ret) {
1168 dev_err(dev, "Unable to open firmware %s\n", fn);
1169 return ret;
1170 }
1171
1172 ret = mxt_lookup_bootloader_address(data);
1173 if (ret)
1174 goto release_firmware;
1175
1176 /* Change to the bootloader mode */
1177 data->in_bootloader = true;
1178
1179 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_BOOT_VALUE, false);
1180 if (ret)
1181 goto release_firmware;
1182
1183 msleep(MXT_RESET_TIME);
1184
1185 reinit_completion(&data->bl_completion);
1186
1187 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD);
1188 if (ret)
1189 goto disable_irq;
1190
1191 /* Unlock bootloader */
1192 mxt_unlock_bootloader(data);
1193
1194 while (pos < fw->size) {
1195 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA);
1196 if (ret)
1197 goto disable_irq;
1198
1199 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
1200
1201 /* We should add 2 at frame size as the the firmware data is not
1202 * included the CRC bytes.
1203 */
1204 frame_size += 2;
1205
1206 /* Write one frame to device */
1207 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
1208 if (ret)
1209 goto disable_irq;
1210
1211 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS);
1212 if (ret)
1213 goto disable_irq;
1214
1215 pos += frame_size;
1216
1217 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
1218 }
1219
1220 /* Wait for flash. */
1221 ret = mxt_wait_for_completion(data, &data->bl_completion,
1222 MXT_FW_RESET_TIME);
1223 if (ret)
1224 goto disable_irq;
1225
1226 /*
1227 * Wait for device to reset. Some bootloader versions do not assert
1228 * the CHG line after bootloading has finished, so ignore potential
1229 * errors.
1230 */
1231 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
1232
1233 data->in_bootloader = false;
1234
1235 disable_irq:
1236 disable_irq(data->irq);
1237 release_firmware:
1238 release_firmware(fw);
1239 return ret;
1240 }
1241
1242 static ssize_t mxt_update_fw_store(struct device *dev,
1243 struct device_attribute *attr,
1244 const char *buf, size_t count)
1245 {
1246 struct mxt_data *data = dev_get_drvdata(dev);
1247 int error;
1248
1249 error = mxt_load_fw(dev, MXT_FW_NAME);
1250 if (error) {
1251 dev_err(dev, "The firmware update failed(%d)\n", error);
1252 count = error;
1253 } else {
1254 dev_info(dev, "The firmware update succeeded\n");
1255
1256 mxt_free_object_table(data);
1257
1258 mxt_initialize(data);
1259
1260 enable_irq(data->irq);
1261
1262 error = mxt_make_highchg(data);
1263 if (error)
1264 return error;
1265 }
1266
1267 return count;
1268 }
1269
1270 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1271 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1272 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1273 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1274
1275 static struct attribute *mxt_attrs[] = {
1276 &dev_attr_fw_version.attr,
1277 &dev_attr_hw_version.attr,
1278 &dev_attr_object.attr,
1279 &dev_attr_update_fw.attr,
1280 NULL
1281 };
1282
1283 static const struct attribute_group mxt_attr_group = {
1284 .attrs = mxt_attrs,
1285 };
1286
1287 static void mxt_start(struct mxt_data *data)
1288 {
1289 /* Touch enable */
1290 mxt_write_object(data,
1291 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1292 }
1293
1294 static void mxt_stop(struct mxt_data *data)
1295 {
1296 /* Touch disable */
1297 mxt_write_object(data,
1298 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1299 }
1300
1301 static int mxt_input_open(struct input_dev *dev)
1302 {
1303 struct mxt_data *data = input_get_drvdata(dev);
1304
1305 mxt_start(data);
1306
1307 return 0;
1308 }
1309
1310 static void mxt_input_close(struct input_dev *dev)
1311 {
1312 struct mxt_data *data = input_get_drvdata(dev);
1313
1314 mxt_stop(data);
1315 }
1316
1317 static int mxt_probe(struct i2c_client *client,
1318 const struct i2c_device_id *id)
1319 {
1320 const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
1321 struct mxt_data *data;
1322 struct input_dev *input_dev;
1323 int error;
1324 unsigned int num_mt_slots;
1325 unsigned int mt_flags = 0;
1326 int i;
1327
1328 if (!pdata)
1329 return -EINVAL;
1330
1331 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1332 input_dev = input_allocate_device();
1333 if (!data || !input_dev) {
1334 dev_err(&client->dev, "Failed to allocate memory\n");
1335 error = -ENOMEM;
1336 goto err_free_mem;
1337 }
1338
1339 input_dev->name = "Atmel maXTouch Touchscreen";
1340 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1341 client->adapter->nr, client->addr);
1342
1343 input_dev->phys = data->phys;
1344
1345 input_dev->id.bustype = BUS_I2C;
1346 input_dev->dev.parent = &client->dev;
1347 input_dev->open = mxt_input_open;
1348 input_dev->close = mxt_input_close;
1349
1350 data->client = client;
1351 data->input_dev = input_dev;
1352 data->pdata = pdata;
1353 data->irq = client->irq;
1354
1355 init_completion(&data->bl_completion);
1356 init_completion(&data->reset_completion);
1357 init_completion(&data->crc_completion);
1358
1359 mxt_calc_resolution(data);
1360
1361 error = mxt_initialize(data);
1362 if (error)
1363 goto err_free_mem;
1364
1365 __set_bit(EV_ABS, input_dev->evbit);
1366 __set_bit(EV_KEY, input_dev->evbit);
1367 __set_bit(BTN_TOUCH, input_dev->keybit);
1368
1369 if (pdata->t19_num_keys) {
1370 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1371
1372 for (i = 0; i < pdata->t19_num_keys; i++)
1373 if (pdata->t19_keymap[i] != KEY_RESERVED)
1374 input_set_capability(input_dev, EV_KEY,
1375 pdata->t19_keymap[i]);
1376
1377 mt_flags |= INPUT_MT_POINTER;
1378
1379 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1380 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1381 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1382 MXT_PIXELS_PER_MM);
1383 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1384 MXT_PIXELS_PER_MM);
1385
1386 input_dev->name = "Atmel maXTouch Touchpad";
1387 }
1388
1389 /* For single touch */
1390 input_set_abs_params(input_dev, ABS_X,
1391 0, data->max_x, 0, 0);
1392 input_set_abs_params(input_dev, ABS_Y,
1393 0, data->max_y, 0, 0);
1394 input_set_abs_params(input_dev, ABS_PRESSURE,
1395 0, 255, 0, 0);
1396
1397 /* For multi touch */
1398 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1399 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1400 if (error)
1401 goto err_free_object;
1402 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1403 0, MXT_MAX_AREA, 0, 0);
1404 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1405 0, data->max_x, 0, 0);
1406 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1407 0, data->max_y, 0, 0);
1408 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1409 0, 255, 0, 0);
1410
1411 input_set_drvdata(input_dev, data);
1412 i2c_set_clientdata(client, data);
1413
1414 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1415 pdata->irqflags | IRQF_ONESHOT,
1416 client->name, data);
1417 if (error) {
1418 dev_err(&client->dev, "Failed to register interrupt\n");
1419 goto err_free_object;
1420 }
1421
1422 error = mxt_make_highchg(data);
1423 if (error)
1424 goto err_free_irq;
1425
1426 error = input_register_device(input_dev);
1427 if (error) {
1428 dev_err(&client->dev, "Error %d registering input device\n",
1429 error);
1430 goto err_free_irq;
1431 }
1432
1433 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1434 if (error) {
1435 dev_err(&client->dev, "Failure %d creating sysfs group\n",
1436 error);
1437 goto err_unregister_device;
1438 }
1439
1440 return 0;
1441
1442 err_unregister_device:
1443 input_unregister_device(input_dev);
1444 input_dev = NULL;
1445 err_free_irq:
1446 free_irq(client->irq, data);
1447 err_free_object:
1448 kfree(data->object_table);
1449 err_free_mem:
1450 input_free_device(input_dev);
1451 kfree(data);
1452 return error;
1453 }
1454
1455 static int mxt_remove(struct i2c_client *client)
1456 {
1457 struct mxt_data *data = i2c_get_clientdata(client);
1458
1459 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1460 free_irq(data->irq, data);
1461 input_unregister_device(data->input_dev);
1462 kfree(data->object_table);
1463 kfree(data);
1464
1465 return 0;
1466 }
1467
1468 #ifdef CONFIG_PM_SLEEP
1469 static int mxt_suspend(struct device *dev)
1470 {
1471 struct i2c_client *client = to_i2c_client(dev);
1472 struct mxt_data *data = i2c_get_clientdata(client);
1473 struct input_dev *input_dev = data->input_dev;
1474
1475 mutex_lock(&input_dev->mutex);
1476
1477 if (input_dev->users)
1478 mxt_stop(data);
1479
1480 mutex_unlock(&input_dev->mutex);
1481
1482 return 0;
1483 }
1484
1485 static int mxt_resume(struct device *dev)
1486 {
1487 struct i2c_client *client = to_i2c_client(dev);
1488 struct mxt_data *data = i2c_get_clientdata(client);
1489 struct input_dev *input_dev = data->input_dev;
1490
1491 mxt_soft_reset(data);
1492
1493 mutex_lock(&input_dev->mutex);
1494
1495 if (input_dev->users)
1496 mxt_start(data);
1497
1498 mutex_unlock(&input_dev->mutex);
1499
1500 return 0;
1501 }
1502 #endif
1503
1504 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1505
1506 static const struct i2c_device_id mxt_id[] = {
1507 { "qt602240_ts", 0 },
1508 { "atmel_mxt_ts", 0 },
1509 { "atmel_mxt_tp", 0 },
1510 { "mXT224", 0 },
1511 { }
1512 };
1513 MODULE_DEVICE_TABLE(i2c, mxt_id);
1514
1515 static struct i2c_driver mxt_driver = {
1516 .driver = {
1517 .name = "atmel_mxt_ts",
1518 .owner = THIS_MODULE,
1519 .pm = &mxt_pm_ops,
1520 },
1521 .probe = mxt_probe,
1522 .remove = mxt_remove,
1523 .id_table = mxt_id,
1524 };
1525
1526 module_i2c_driver(mxt_driver);
1527
1528 /* Module information */
1529 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1530 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1531 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.094855 seconds and 5 git commands to generate.