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Input: atmel_mxt_ts - read screen config from chip
[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_T9_ORIENT 9
104 #define MXT_T9_RANGE 18
105
106 struct t9_range {
107 u16 x;
108 u16 y;
109 } __packed;
110
111 /* Touch orient bits */
112 #define MXT_XY_SWITCH (1 << 0)
113
114 /* MXT_PROCI_GRIPFACE_T20 field */
115 #define MXT_GRIPFACE_CTRL 0
116 #define MXT_GRIPFACE_XLOGRIP 1
117 #define MXT_GRIPFACE_XHIGRIP 2
118 #define MXT_GRIPFACE_YLOGRIP 3
119 #define MXT_GRIPFACE_YHIGRIP 4
120 #define MXT_GRIPFACE_MAXTCHS 5
121 #define MXT_GRIPFACE_SZTHR1 7
122 #define MXT_GRIPFACE_SZTHR2 8
123 #define MXT_GRIPFACE_SHPTHR1 9
124 #define MXT_GRIPFACE_SHPTHR2 10
125 #define MXT_GRIPFACE_SUPEXTTO 11
126
127 /* MXT_PROCI_NOISE field */
128 #define MXT_NOISE_CTRL 0
129 #define MXT_NOISE_OUTFLEN 1
130 #define MXT_NOISE_GCAFUL_LSB 3
131 #define MXT_NOISE_GCAFUL_MSB 4
132 #define MXT_NOISE_GCAFLL_LSB 5
133 #define MXT_NOISE_GCAFLL_MSB 6
134 #define MXT_NOISE_ACTVGCAFVALID 7
135 #define MXT_NOISE_NOISETHR 8
136 #define MXT_NOISE_FREQHOPSCALE 10
137 #define MXT_NOISE_FREQ0 11
138 #define MXT_NOISE_FREQ1 12
139 #define MXT_NOISE_FREQ2 13
140 #define MXT_NOISE_FREQ3 14
141 #define MXT_NOISE_FREQ4 15
142 #define MXT_NOISE_IDLEGCAFVALID 16
143
144 /* MXT_SPT_COMMSCONFIG_T18 */
145 #define MXT_COMMS_CTRL 0
146 #define MXT_COMMS_CMD 1
147
148 /* MXT_SPT_CTECONFIG_T28 field */
149 #define MXT_CTE_CTRL 0
150 #define MXT_CTE_CMD 1
151 #define MXT_CTE_MODE 2
152 #define MXT_CTE_IDLEGCAFDEPTH 3
153 #define MXT_CTE_ACTVGCAFDEPTH 4
154 #define MXT_CTE_VOLTAGE 5
155
156 #define MXT_VOLTAGE_DEFAULT 2700000
157 #define MXT_VOLTAGE_STEP 10000
158
159 /* Define for MXT_GEN_COMMAND_T6 */
160 #define MXT_BOOT_VALUE 0xa5
161 #define MXT_RESET_VALUE 0x01
162 #define MXT_BACKUP_VALUE 0x55
163
164 /* Delay times */
165 #define MXT_BACKUP_TIME 50 /* msec */
166 #define MXT_RESET_TIME 200 /* msec */
167 #define MXT_RESET_TIMEOUT 3000 /* msec */
168 #define MXT_CRC_TIMEOUT 1000 /* msec */
169 #define MXT_FW_RESET_TIME 3000 /* msec */
170 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
171
172 /* Command to unlock bootloader */
173 #define MXT_UNLOCK_CMD_MSB 0xaa
174 #define MXT_UNLOCK_CMD_LSB 0xdc
175
176 /* Bootloader mode status */
177 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
178 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
179 #define MXT_FRAME_CRC_CHECK 0x02
180 #define MXT_FRAME_CRC_FAIL 0x03
181 #define MXT_FRAME_CRC_PASS 0x04
182 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
183 #define MXT_BOOT_STATUS_MASK 0x3f
184 #define MXT_BOOT_EXTENDED_ID (1 << 5)
185 #define MXT_BOOT_ID_MASK 0x1f
186
187 /* Touch status */
188 #define MXT_UNGRIP (1 << 0)
189 #define MXT_SUPPRESS (1 << 1)
190 #define MXT_AMP (1 << 2)
191 #define MXT_VECTOR (1 << 3)
192 #define MXT_MOVE (1 << 4)
193 #define MXT_RELEASE (1 << 5)
194 #define MXT_PRESS (1 << 6)
195 #define MXT_DETECT (1 << 7)
196
197 /* Touchscreen absolute values */
198 #define MXT_MAX_AREA 0xff
199
200 #define MXT_PIXELS_PER_MM 20
201
202 struct mxt_info {
203 u8 family_id;
204 u8 variant_id;
205 u8 version;
206 u8 build;
207 u8 matrix_xsize;
208 u8 matrix_ysize;
209 u8 object_num;
210 };
211
212 struct mxt_object {
213 u8 type;
214 u16 start_address;
215 u8 size_minus_one;
216 u8 instances_minus_one;
217 u8 num_report_ids;
218 } __packed;
219
220 struct mxt_message {
221 u8 reportid;
222 u8 message[7];
223 };
224
225 /* Each client has this additional data */
226 struct mxt_data {
227 struct i2c_client *client;
228 struct input_dev *input_dev;
229 char phys[64]; /* device physical location */
230 const struct mxt_platform_data *pdata;
231 struct mxt_object *object_table;
232 struct mxt_info info;
233 unsigned int irq;
234 unsigned int max_x;
235 unsigned int max_y;
236 bool in_bootloader;
237 u32 config_crc;
238 u8 bootloader_addr;
239
240 /* Cached parameters from object table */
241 u8 T6_reportid;
242 u16 T6_address;
243 u8 T9_reportid_min;
244 u8 T9_reportid_max;
245 u8 T19_reportid;
246
247 /* for fw update in bootloader */
248 struct completion bl_completion;
249
250 /* for reset handling */
251 struct completion reset_completion;
252
253 /* for config update handling */
254 struct completion crc_completion;
255 };
256
257 static size_t mxt_obj_size(const struct mxt_object *obj)
258 {
259 return obj->size_minus_one + 1;
260 }
261
262 static size_t mxt_obj_instances(const struct mxt_object *obj)
263 {
264 return obj->instances_minus_one + 1;
265 }
266
267 static bool mxt_object_readable(unsigned int type)
268 {
269 switch (type) {
270 case MXT_GEN_COMMAND_T6:
271 case MXT_GEN_POWER_T7:
272 case MXT_GEN_ACQUIRE_T8:
273 case MXT_GEN_DATASOURCE_T53:
274 case MXT_TOUCH_MULTI_T9:
275 case MXT_TOUCH_KEYARRAY_T15:
276 case MXT_TOUCH_PROXIMITY_T23:
277 case MXT_TOUCH_PROXKEY_T52:
278 case MXT_PROCI_GRIPFACE_T20:
279 case MXT_PROCG_NOISE_T22:
280 case MXT_PROCI_ONETOUCH_T24:
281 case MXT_PROCI_TWOTOUCH_T27:
282 case MXT_PROCI_GRIP_T40:
283 case MXT_PROCI_PALM_T41:
284 case MXT_PROCI_TOUCHSUPPRESSION_T42:
285 case MXT_PROCI_STYLUS_T47:
286 case MXT_PROCG_NOISESUPPRESSION_T48:
287 case MXT_SPT_COMMSCONFIG_T18:
288 case MXT_SPT_GPIOPWM_T19:
289 case MXT_SPT_SELFTEST_T25:
290 case MXT_SPT_CTECONFIG_T28:
291 case MXT_SPT_USERDATA_T38:
292 case MXT_SPT_DIGITIZER_T43:
293 case MXT_SPT_CTECONFIG_T46:
294 return true;
295 default:
296 return false;
297 }
298 }
299
300 static bool mxt_object_writable(unsigned int type)
301 {
302 switch (type) {
303 case MXT_GEN_COMMAND_T6:
304 case MXT_GEN_POWER_T7:
305 case MXT_GEN_ACQUIRE_T8:
306 case MXT_TOUCH_MULTI_T9:
307 case MXT_TOUCH_KEYARRAY_T15:
308 case MXT_TOUCH_PROXIMITY_T23:
309 case MXT_TOUCH_PROXKEY_T52:
310 case MXT_PROCI_GRIPFACE_T20:
311 case MXT_PROCG_NOISE_T22:
312 case MXT_PROCI_ONETOUCH_T24:
313 case MXT_PROCI_TWOTOUCH_T27:
314 case MXT_PROCI_GRIP_T40:
315 case MXT_PROCI_PALM_T41:
316 case MXT_PROCI_TOUCHSUPPRESSION_T42:
317 case MXT_PROCI_STYLUS_T47:
318 case MXT_PROCG_NOISESUPPRESSION_T48:
319 case MXT_SPT_COMMSCONFIG_T18:
320 case MXT_SPT_GPIOPWM_T19:
321 case MXT_SPT_SELFTEST_T25:
322 case MXT_SPT_CTECONFIG_T28:
323 case MXT_SPT_DIGITIZER_T43:
324 case MXT_SPT_CTECONFIG_T46:
325 return true;
326 default:
327 return false;
328 }
329 }
330
331 static void mxt_dump_message(struct device *dev,
332 struct mxt_message *message)
333 {
334 dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
335 message->reportid, 7, message->message);
336 }
337
338 static int mxt_wait_for_completion(struct mxt_data *data,
339 struct completion *comp,
340 unsigned int timeout_ms)
341 {
342 struct device *dev = &data->client->dev;
343 unsigned long timeout = msecs_to_jiffies(timeout_ms);
344 long ret;
345
346 ret = wait_for_completion_interruptible_timeout(comp, timeout);
347 if (ret < 0) {
348 return ret;
349 } else if (ret == 0) {
350 dev_err(dev, "Wait for completion timed out.\n");
351 return -ETIMEDOUT;
352 }
353 return 0;
354 }
355
356 static int mxt_bootloader_read(struct mxt_data *data,
357 u8 *val, unsigned int count)
358 {
359 int ret;
360 struct i2c_msg msg;
361
362 msg.addr = data->bootloader_addr;
363 msg.flags = data->client->flags & I2C_M_TEN;
364 msg.flags |= I2C_M_RD;
365 msg.len = count;
366 msg.buf = val;
367
368 ret = i2c_transfer(data->client->adapter, &msg, 1);
369
370 if (ret == 1) {
371 ret = 0;
372 } else {
373 ret = ret < 0 ? ret : -EIO;
374 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
375 __func__, ret);
376 }
377
378 return ret;
379 }
380
381 static int mxt_bootloader_write(struct mxt_data *data,
382 const u8 * const val, unsigned int count)
383 {
384 int ret;
385 struct i2c_msg msg;
386
387 msg.addr = data->bootloader_addr;
388 msg.flags = data->client->flags & I2C_M_TEN;
389 msg.len = count;
390 msg.buf = (u8 *)val;
391
392 ret = i2c_transfer(data->client->adapter, &msg, 1);
393 if (ret == 1) {
394 ret = 0;
395 } else {
396 ret = ret < 0 ? ret : -EIO;
397 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
398 __func__, ret);
399 }
400
401 return ret;
402 }
403
404 static int mxt_lookup_bootloader_address(struct mxt_data *data)
405 {
406 u8 appmode = data->client->addr;
407 u8 bootloader;
408
409 switch (appmode) {
410 case 0x4a:
411 case 0x4b:
412 case 0x4c:
413 case 0x4d:
414 case 0x5a:
415 case 0x5b:
416 bootloader = appmode - 0x26;
417 break;
418 default:
419 dev_err(&data->client->dev,
420 "Appmode i2c address 0x%02x not found\n",
421 appmode);
422 return -EINVAL;
423 }
424
425 data->bootloader_addr = bootloader;
426 return 0;
427 }
428
429 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
430 {
431 struct device *dev = &data->client->dev;
432 u8 buf[3];
433
434 if (val & MXT_BOOT_EXTENDED_ID) {
435 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
436 dev_err(dev, "%s: i2c failure\n", __func__);
437 return -EIO;
438 }
439
440 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
441
442 return buf[0];
443 } else {
444 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
445
446 return val;
447 }
448 }
449
450 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state)
451 {
452 struct device *dev = &data->client->dev;
453 u8 val;
454 int ret;
455
456 recheck:
457 if (state != MXT_WAITING_BOOTLOAD_CMD) {
458 /*
459 * In application update mode, the interrupt
460 * line signals state transitions. We must wait for the
461 * CHG assertion before reading the status byte.
462 * Once the status byte has been read, the line is deasserted.
463 */
464 ret = mxt_wait_for_completion(data, &data->bl_completion,
465 MXT_FW_CHG_TIMEOUT);
466 if (ret) {
467 /*
468 * TODO: handle -ERESTARTSYS better by terminating
469 * fw update process before returning to userspace
470 * by writing length 0x000 to device (iff we are in
471 * WAITING_FRAME_DATA state).
472 */
473 dev_err(dev, "Update wait error %d\n", ret);
474 return ret;
475 }
476 }
477
478 ret = mxt_bootloader_read(data, &val, 1);
479 if (ret)
480 return ret;
481
482 if (state == MXT_WAITING_BOOTLOAD_CMD)
483 val = mxt_get_bootloader_version(data, val);
484
485 switch (state) {
486 case MXT_WAITING_BOOTLOAD_CMD:
487 case MXT_WAITING_FRAME_DATA:
488 val &= ~MXT_BOOT_STATUS_MASK;
489 break;
490 case MXT_FRAME_CRC_PASS:
491 if (val == MXT_FRAME_CRC_CHECK) {
492 goto recheck;
493 } else if (val == MXT_FRAME_CRC_FAIL) {
494 dev_err(dev, "Bootloader CRC fail\n");
495 return -EINVAL;
496 }
497 break;
498 default:
499 return -EINVAL;
500 }
501
502 if (val != state) {
503 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
504 val, state);
505 return -EINVAL;
506 }
507
508 return 0;
509 }
510
511 static int mxt_unlock_bootloader(struct mxt_data *data)
512 {
513 int ret;
514 u8 buf[2];
515
516 buf[0] = MXT_UNLOCK_CMD_LSB;
517 buf[1] = MXT_UNLOCK_CMD_MSB;
518
519 ret = mxt_bootloader_write(data, buf, 2);
520 if (ret)
521 return ret;
522
523 return 0;
524 }
525
526 static int __mxt_read_reg(struct i2c_client *client,
527 u16 reg, u16 len, void *val)
528 {
529 struct i2c_msg xfer[2];
530 u8 buf[2];
531 int ret;
532
533 buf[0] = reg & 0xff;
534 buf[1] = (reg >> 8) & 0xff;
535
536 /* Write register */
537 xfer[0].addr = client->addr;
538 xfer[0].flags = 0;
539 xfer[0].len = 2;
540 xfer[0].buf = buf;
541
542 /* Read data */
543 xfer[1].addr = client->addr;
544 xfer[1].flags = I2C_M_RD;
545 xfer[1].len = len;
546 xfer[1].buf = val;
547
548 ret = i2c_transfer(client->adapter, xfer, 2);
549 if (ret == 2) {
550 ret = 0;
551 } else {
552 if (ret >= 0)
553 ret = -EIO;
554 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
555 __func__, ret);
556 }
557
558 return ret;
559 }
560
561 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
562 const void *val)
563 {
564 u8 *buf;
565 size_t count;
566 int ret;
567
568 count = len + 2;
569 buf = kmalloc(count, GFP_KERNEL);
570 if (!buf)
571 return -ENOMEM;
572
573 buf[0] = reg & 0xff;
574 buf[1] = (reg >> 8) & 0xff;
575 memcpy(&buf[2], val, len);
576
577 ret = i2c_master_send(client, buf, count);
578 if (ret == count) {
579 ret = 0;
580 } else {
581 if (ret >= 0)
582 ret = -EIO;
583 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
584 __func__, ret);
585 }
586
587 kfree(buf);
588 return ret;
589 }
590
591 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
592 {
593 return __mxt_write_reg(client, reg, 1, &val);
594 }
595
596 static struct mxt_object *
597 mxt_get_object(struct mxt_data *data, u8 type)
598 {
599 struct mxt_object *object;
600 int i;
601
602 for (i = 0; i < data->info.object_num; i++) {
603 object = data->object_table + i;
604 if (object->type == type)
605 return object;
606 }
607
608 dev_err(&data->client->dev, "Invalid object type T%u\n", type);
609 return NULL;
610 }
611
612 static int mxt_read_message(struct mxt_data *data,
613 struct mxt_message *message)
614 {
615 struct mxt_object *object;
616 u16 reg;
617
618 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
619 if (!object)
620 return -EINVAL;
621
622 reg = object->start_address;
623 return __mxt_read_reg(data->client, reg,
624 sizeof(struct mxt_message), message);
625 }
626
627 static int mxt_write_object(struct mxt_data *data,
628 u8 type, u8 offset, u8 val)
629 {
630 struct mxt_object *object;
631 u16 reg;
632
633 object = mxt_get_object(data, type);
634 if (!object || offset >= mxt_obj_size(object))
635 return -EINVAL;
636
637 reg = object->start_address;
638 return mxt_write_reg(data->client, reg + offset, val);
639 }
640
641 static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
642 {
643 struct input_dev *input = data->input_dev;
644 const struct mxt_platform_data *pdata = data->pdata;
645 bool button;
646 int i;
647
648 /* Active-low switch */
649 for (i = 0; i < pdata->t19_num_keys; i++) {
650 if (pdata->t19_keymap[i] == KEY_RESERVED)
651 continue;
652 button = !(message->message[0] & (1 << i));
653 input_report_key(input, pdata->t19_keymap[i], button);
654 }
655 }
656
657 static void mxt_input_touchevent(struct mxt_data *data,
658 struct mxt_message *message, int id)
659 {
660 struct device *dev = &data->client->dev;
661 u8 status = message->message[0];
662 struct input_dev *input_dev = data->input_dev;
663 int x;
664 int y;
665 int area;
666 int pressure;
667
668 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
669 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
670 if (data->max_x < 1024)
671 x = x >> 2;
672 if (data->max_y < 1024)
673 y = y >> 2;
674
675 area = message->message[4];
676 pressure = message->message[5];
677
678 dev_dbg(dev,
679 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
680 id,
681 (status & MXT_DETECT) ? 'D' : '.',
682 (status & MXT_PRESS) ? 'P' : '.',
683 (status & MXT_RELEASE) ? 'R' : '.',
684 (status & MXT_MOVE) ? 'M' : '.',
685 (status & MXT_VECTOR) ? 'V' : '.',
686 (status & MXT_AMP) ? 'A' : '.',
687 (status & MXT_SUPPRESS) ? 'S' : '.',
688 (status & MXT_UNGRIP) ? 'U' : '.',
689 x, y, area, pressure);
690
691 input_mt_slot(input_dev, id);
692 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
693 status & MXT_DETECT);
694
695 if (status & MXT_DETECT) {
696 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
697 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
698 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
699 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
700 }
701 }
702
703 static u16 mxt_extract_T6_csum(const u8 *csum)
704 {
705 return csum[0] | (csum[1] << 8) | (csum[2] << 16);
706 }
707
708 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
709 {
710 u8 id = msg->reportid;
711 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
712 }
713
714 static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data)
715 {
716 struct mxt_message message;
717 const u8 *payload = &message.message[0];
718 struct device *dev = &data->client->dev;
719 u8 reportid;
720 bool update_input = false;
721 u32 crc;
722
723 do {
724 if (mxt_read_message(data, &message)) {
725 dev_err(dev, "Failed to read message\n");
726 return IRQ_NONE;
727 }
728
729 reportid = message.reportid;
730
731 if (reportid == data->T6_reportid) {
732 u8 status = payload[0];
733
734 crc = mxt_extract_T6_csum(&payload[1]);
735 if (crc != data->config_crc) {
736 data->config_crc = crc;
737 complete(&data->crc_completion);
738 }
739
740 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
741 status, data->config_crc);
742
743 if (status & MXT_T6_STATUS_RESET)
744 complete(&data->reset_completion);
745 } else if (mxt_is_T9_message(data, &message)) {
746 int id = reportid - data->T9_reportid_min;
747 mxt_input_touchevent(data, &message, id);
748 update_input = true;
749 } else if (message.reportid == data->T19_reportid) {
750 mxt_input_button(data, &message);
751 update_input = true;
752 } else {
753 mxt_dump_message(dev, &message);
754 }
755 } while (reportid != 0xff);
756
757 if (update_input) {
758 input_mt_report_pointer_emulation(data->input_dev, false);
759 input_sync(data->input_dev);
760 }
761
762 return IRQ_HANDLED;
763 }
764
765 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
766 {
767 struct mxt_data *data = dev_id;
768
769 if (data->in_bootloader) {
770 /* bootloader state transition completion */
771 complete(&data->bl_completion);
772 return IRQ_HANDLED;
773 }
774
775 return mxt_process_messages_until_invalid(data);
776 }
777
778 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
779 u8 value, bool wait)
780 {
781 u16 reg;
782 u8 command_register;
783 int timeout_counter = 0;
784 int ret;
785
786 reg = data->T6_address + cmd_offset;
787
788 ret = mxt_write_reg(data->client, reg, value);
789 if (ret)
790 return ret;
791
792 if (!wait)
793 return 0;
794
795 do {
796 msleep(20);
797 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
798 if (ret)
799 return ret;
800 } while (command_register != 0 && timeout_counter++ <= 100);
801
802 if (timeout_counter > 100) {
803 dev_err(&data->client->dev, "Command failed!\n");
804 return -EIO;
805 }
806
807 return 0;
808 }
809
810 static int mxt_soft_reset(struct mxt_data *data)
811 {
812 struct device *dev = &data->client->dev;
813 int ret = 0;
814
815 dev_info(dev, "Resetting chip\n");
816
817 reinit_completion(&data->reset_completion);
818
819 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
820 if (ret)
821 return ret;
822
823 ret = mxt_wait_for_completion(data, &data->reset_completion,
824 MXT_RESET_TIMEOUT);
825 if (ret)
826 return ret;
827
828 return 0;
829 }
830
831 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
832 {
833 /*
834 * On failure, CRC is set to 0 and config will always be
835 * downloaded.
836 */
837 data->config_crc = 0;
838 reinit_completion(&data->crc_completion);
839
840 mxt_t6_command(data, cmd, value, true);
841
842 /*
843 * Wait for crc message. On failure, CRC is set to 0 and config will
844 * always be downloaded.
845 */
846 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
847 }
848
849 static int mxt_check_reg_init(struct mxt_data *data)
850 {
851 const struct mxt_platform_data *pdata = data->pdata;
852 struct mxt_object *object;
853 struct device *dev = &data->client->dev;
854 int index = 0;
855 int i, size;
856 int ret;
857
858 if (!pdata->config) {
859 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
860 return 0;
861 }
862
863 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
864
865 if (data->config_crc == pdata->config_crc) {
866 dev_info(dev, "Config CRC 0x%06X: OK\n", data->config_crc);
867 return 0;
868 }
869
870 dev_info(dev, "Config CRC 0x%06X: does not match 0x%06X\n",
871 data->config_crc, pdata->config_crc);
872
873 for (i = 0; i < data->info.object_num; i++) {
874 object = data->object_table + i;
875
876 if (!mxt_object_writable(object->type))
877 continue;
878
879 size = mxt_obj_size(object) * mxt_obj_instances(object);
880 if (index + size > pdata->config_length) {
881 dev_err(dev, "Not enough config data!\n");
882 return -EINVAL;
883 }
884
885 ret = __mxt_write_reg(data->client, object->start_address,
886 size, &pdata->config[index]);
887 if (ret)
888 return ret;
889 index += size;
890 }
891
892 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
893
894 ret = mxt_soft_reset(data);
895 if (ret)
896 return ret;
897
898 dev_info(dev, "Config successfully updated\n");
899
900 return 0;
901 }
902
903 static int mxt_make_highchg(struct mxt_data *data)
904 {
905 struct device *dev = &data->client->dev;
906 struct mxt_message message;
907 int count = 10;
908 int error;
909
910 /* Read dummy message to make high CHG pin */
911 do {
912 error = mxt_read_message(data, &message);
913 if (error)
914 return error;
915 } while (message.reportid != 0xff && --count);
916
917 if (!count) {
918 dev_err(dev, "CHG pin isn't cleared\n");
919 return -EBUSY;
920 }
921
922 return 0;
923 }
924
925 static int mxt_get_info(struct mxt_data *data)
926 {
927 struct i2c_client *client = data->client;
928 struct mxt_info *info = &data->info;
929 int error;
930
931 /* Read 7-byte info block starting at address 0 */
932 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
933 if (error)
934 return error;
935
936 return 0;
937 }
938
939 static int mxt_get_object_table(struct mxt_data *data)
940 {
941 struct i2c_client *client = data->client;
942 size_t table_size;
943 int error;
944 int i;
945 u8 reportid;
946
947 table_size = data->info.object_num * sizeof(struct mxt_object);
948 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
949 data->object_table);
950 if (error)
951 return error;
952
953 /* Valid Report IDs start counting from 1 */
954 reportid = 1;
955 for (i = 0; i < data->info.object_num; i++) {
956 struct mxt_object *object = data->object_table + i;
957 u8 min_id, max_id;
958
959 le16_to_cpus(&object->start_address);
960
961 if (object->num_report_ids) {
962 min_id = reportid;
963 reportid += object->num_report_ids *
964 mxt_obj_instances(object);
965 max_id = reportid - 1;
966 } else {
967 min_id = 0;
968 max_id = 0;
969 }
970
971 dev_dbg(&data->client->dev,
972 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
973 object->type, object->start_address,
974 mxt_obj_size(object), mxt_obj_instances(object),
975 min_id, max_id);
976
977 switch (object->type) {
978 case MXT_GEN_COMMAND_T6:
979 data->T6_reportid = min_id;
980 data->T6_address = object->start_address;
981 break;
982 case MXT_TOUCH_MULTI_T9:
983 data->T9_reportid_min = min_id;
984 data->T9_reportid_max = max_id;
985 break;
986 case MXT_SPT_GPIOPWM_T19:
987 data->T19_reportid = min_id;
988 break;
989 }
990 }
991
992 return 0;
993 }
994
995 static void mxt_free_object_table(struct mxt_data *data)
996 {
997 kfree(data->object_table);
998 data->object_table = NULL;
999 data->T6_reportid = 0;
1000 data->T9_reportid_min = 0;
1001 data->T9_reportid_max = 0;
1002 data->T19_reportid = 0;
1003 }
1004
1005 static int mxt_read_t9_resolution(struct mxt_data *data)
1006 {
1007 struct i2c_client *client = data->client;
1008 int error;
1009 struct t9_range range;
1010 unsigned char orient;
1011 struct mxt_object *object;
1012
1013 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1014 if (!object)
1015 return -EINVAL;
1016
1017 error = __mxt_read_reg(client,
1018 object->start_address + MXT_T9_RANGE,
1019 sizeof(range), &range);
1020 if (error)
1021 return error;
1022
1023 le16_to_cpus(&range.x);
1024 le16_to_cpus(&range.y);
1025
1026 error = __mxt_read_reg(client,
1027 object->start_address + MXT_T9_ORIENT,
1028 1, &orient);
1029 if (error)
1030 return error;
1031
1032 /* Handle default values */
1033 if (range.x == 0)
1034 range.x = 1023;
1035
1036 if (range.y == 0)
1037 range.y = 1023;
1038
1039 if (orient & MXT_XY_SWITCH) {
1040 data->max_x = range.y;
1041 data->max_y = range.x;
1042 } else {
1043 data->max_x = range.x;
1044 data->max_y = range.y;
1045 }
1046
1047 dev_dbg(&client->dev,
1048 "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1049
1050 return 0;
1051 }
1052
1053 static int mxt_initialize(struct mxt_data *data)
1054 {
1055 struct i2c_client *client = data->client;
1056 struct mxt_info *info = &data->info;
1057 int error;
1058
1059 error = mxt_get_info(data);
1060 if (error)
1061 return error;
1062
1063 data->object_table = kcalloc(info->object_num,
1064 sizeof(struct mxt_object),
1065 GFP_KERNEL);
1066 if (!data->object_table) {
1067 dev_err(&client->dev, "Failed to allocate memory\n");
1068 return -ENOMEM;
1069 }
1070
1071 /* Get object table information */
1072 error = mxt_get_object_table(data);
1073 if (error) {
1074 dev_err(&client->dev, "Error %d reading object table\n", error);
1075 goto err_free_object_table;
1076 }
1077
1078 /* Check register init values */
1079 error = mxt_check_reg_init(data);
1080 if (error) {
1081 dev_err(&client->dev, "Error %d initializing configuration\n",
1082 error);
1083 goto err_free_object_table;
1084 }
1085
1086 error = mxt_read_t9_resolution(data);
1087 if (error) {
1088 dev_err(&client->dev, "Failed to initialize T9 resolution\n");
1089 goto err_free_object_table;
1090 }
1091
1092 dev_info(&client->dev,
1093 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
1094 info->family_id, info->variant_id, info->version >> 4,
1095 info->version & 0xf, info->build, info->object_num);
1096
1097 return 0;
1098
1099 err_free_object_table:
1100 mxt_free_object_table(data);
1101 return error;
1102 }
1103
1104 /* Firmware Version is returned as Major.Minor.Build */
1105 static ssize_t mxt_fw_version_show(struct device *dev,
1106 struct device_attribute *attr, char *buf)
1107 {
1108 struct mxt_data *data = dev_get_drvdata(dev);
1109 struct mxt_info *info = &data->info;
1110 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
1111 info->version >> 4, info->version & 0xf, info->build);
1112 }
1113
1114 /* Hardware Version is returned as FamilyID.VariantID */
1115 static ssize_t mxt_hw_version_show(struct device *dev,
1116 struct device_attribute *attr, char *buf)
1117 {
1118 struct mxt_data *data = dev_get_drvdata(dev);
1119 struct mxt_info *info = &data->info;
1120 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
1121 info->family_id, info->variant_id);
1122 }
1123
1124 static ssize_t mxt_show_instance(char *buf, int count,
1125 struct mxt_object *object, int instance,
1126 const u8 *val)
1127 {
1128 int i;
1129
1130 if (mxt_obj_instances(object) > 1)
1131 count += scnprintf(buf + count, PAGE_SIZE - count,
1132 "Instance %u\n", instance);
1133
1134 for (i = 0; i < mxt_obj_size(object); i++)
1135 count += scnprintf(buf + count, PAGE_SIZE - count,
1136 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
1137 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
1138
1139 return count;
1140 }
1141
1142 static ssize_t mxt_object_show(struct device *dev,
1143 struct device_attribute *attr, char *buf)
1144 {
1145 struct mxt_data *data = dev_get_drvdata(dev);
1146 struct mxt_object *object;
1147 int count = 0;
1148 int i, j;
1149 int error;
1150 u8 *obuf;
1151
1152 /* Pre-allocate buffer large enough to hold max sized object. */
1153 obuf = kmalloc(256, GFP_KERNEL);
1154 if (!obuf)
1155 return -ENOMEM;
1156
1157 error = 0;
1158 for (i = 0; i < data->info.object_num; i++) {
1159 object = data->object_table + i;
1160
1161 if (!mxt_object_readable(object->type))
1162 continue;
1163
1164 count += scnprintf(buf + count, PAGE_SIZE - count,
1165 "T%u:\n", object->type);
1166
1167 for (j = 0; j < mxt_obj_instances(object); j++) {
1168 u16 size = mxt_obj_size(object);
1169 u16 addr = object->start_address + j * size;
1170
1171 error = __mxt_read_reg(data->client, addr, size, obuf);
1172 if (error)
1173 goto done;
1174
1175 count = mxt_show_instance(buf, count, object, j, obuf);
1176 }
1177 }
1178
1179 done:
1180 kfree(obuf);
1181 return error ?: count;
1182 }
1183
1184 static int mxt_check_firmware_format(struct device *dev,
1185 const struct firmware *fw)
1186 {
1187 unsigned int pos = 0;
1188 char c;
1189
1190 while (pos < fw->size) {
1191 c = *(fw->data + pos);
1192
1193 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
1194 return 0;
1195
1196 pos++;
1197 }
1198
1199 /*
1200 * To convert file try:
1201 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
1202 */
1203 dev_err(dev, "Aborting: firmware file must be in binary format\n");
1204
1205 return -EINVAL;
1206 }
1207
1208 static int mxt_load_fw(struct device *dev, const char *fn)
1209 {
1210 struct mxt_data *data = dev_get_drvdata(dev);
1211 const struct firmware *fw = NULL;
1212 unsigned int frame_size;
1213 unsigned int pos = 0;
1214 unsigned int retry = 0;
1215 unsigned int frame = 0;
1216 int ret;
1217
1218 ret = request_firmware(&fw, fn, dev);
1219 if (ret) {
1220 dev_err(dev, "Unable to open firmware %s\n", fn);
1221 return ret;
1222 }
1223
1224 /* Check for incorrect enc file */
1225 ret = mxt_check_firmware_format(dev, fw);
1226 if (ret)
1227 goto release_firmware;
1228
1229 ret = mxt_lookup_bootloader_address(data);
1230 if (ret)
1231 goto release_firmware;
1232
1233 /* Change to the bootloader mode */
1234 data->in_bootloader = true;
1235
1236 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_BOOT_VALUE, false);
1237 if (ret)
1238 goto release_firmware;
1239
1240 msleep(MXT_RESET_TIME);
1241
1242 reinit_completion(&data->bl_completion);
1243
1244 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD);
1245 if (ret)
1246 goto disable_irq;
1247
1248 /* Unlock bootloader */
1249 mxt_unlock_bootloader(data);
1250
1251 while (pos < fw->size) {
1252 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA);
1253 if (ret)
1254 goto disable_irq;
1255
1256 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
1257
1258 /* Take account of CRC bytes */
1259 frame_size += 2;
1260
1261 /* Write one frame to device */
1262 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
1263 if (ret)
1264 goto disable_irq;
1265
1266 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS);
1267 if (ret) {
1268 retry++;
1269
1270 /* Back off by 20ms per retry */
1271 msleep(retry * 20);
1272
1273 if (retry > 20) {
1274 dev_err(dev, "Retry count exceeded\n");
1275 goto disable_irq;
1276 }
1277 } else {
1278 retry = 0;
1279 pos += frame_size;
1280 frame++;
1281 }
1282
1283 if (frame % 50 == 0)
1284 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
1285 frame, pos, fw->size);
1286 }
1287
1288 /* Wait for flash. */
1289 ret = mxt_wait_for_completion(data, &data->bl_completion,
1290 MXT_FW_RESET_TIME);
1291 if (ret)
1292 goto disable_irq;
1293
1294 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
1295
1296 /*
1297 * Wait for device to reset. Some bootloader versions do not assert
1298 * the CHG line after bootloading has finished, so ignore potential
1299 * errors.
1300 */
1301 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
1302
1303 data->in_bootloader = false;
1304
1305 disable_irq:
1306 disable_irq(data->irq);
1307 release_firmware:
1308 release_firmware(fw);
1309 return ret;
1310 }
1311
1312 static ssize_t mxt_update_fw_store(struct device *dev,
1313 struct device_attribute *attr,
1314 const char *buf, size_t count)
1315 {
1316 struct mxt_data *data = dev_get_drvdata(dev);
1317 int error;
1318
1319 error = mxt_load_fw(dev, MXT_FW_NAME);
1320 if (error) {
1321 dev_err(dev, "The firmware update failed(%d)\n", error);
1322 count = error;
1323 } else {
1324 dev_info(dev, "The firmware update succeeded\n");
1325
1326 mxt_free_object_table(data);
1327
1328 mxt_initialize(data);
1329
1330 enable_irq(data->irq);
1331
1332 error = mxt_make_highchg(data);
1333 if (error)
1334 return error;
1335 }
1336
1337 return count;
1338 }
1339
1340 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1341 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1342 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1343 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1344
1345 static struct attribute *mxt_attrs[] = {
1346 &dev_attr_fw_version.attr,
1347 &dev_attr_hw_version.attr,
1348 &dev_attr_object.attr,
1349 &dev_attr_update_fw.attr,
1350 NULL
1351 };
1352
1353 static const struct attribute_group mxt_attr_group = {
1354 .attrs = mxt_attrs,
1355 };
1356
1357 static void mxt_start(struct mxt_data *data)
1358 {
1359 /* Touch enable */
1360 mxt_write_object(data,
1361 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1362 }
1363
1364 static void mxt_stop(struct mxt_data *data)
1365 {
1366 /* Touch disable */
1367 mxt_write_object(data,
1368 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1369 }
1370
1371 static int mxt_input_open(struct input_dev *dev)
1372 {
1373 struct mxt_data *data = input_get_drvdata(dev);
1374
1375 mxt_start(data);
1376
1377 return 0;
1378 }
1379
1380 static void mxt_input_close(struct input_dev *dev)
1381 {
1382 struct mxt_data *data = input_get_drvdata(dev);
1383
1384 mxt_stop(data);
1385 }
1386
1387 static int mxt_probe(struct i2c_client *client,
1388 const struct i2c_device_id *id)
1389 {
1390 const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
1391 struct mxt_data *data;
1392 struct input_dev *input_dev;
1393 int error;
1394 unsigned int num_mt_slots;
1395 unsigned int mt_flags = 0;
1396 int i;
1397
1398 if (!pdata)
1399 return -EINVAL;
1400
1401 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1402 input_dev = input_allocate_device();
1403 if (!data || !input_dev) {
1404 dev_err(&client->dev, "Failed to allocate memory\n");
1405 error = -ENOMEM;
1406 goto err_free_mem;
1407 }
1408
1409 input_dev->name = "Atmel maXTouch Touchscreen";
1410 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1411 client->adapter->nr, client->addr);
1412
1413 input_dev->phys = data->phys;
1414
1415 input_dev->id.bustype = BUS_I2C;
1416 input_dev->dev.parent = &client->dev;
1417 input_dev->open = mxt_input_open;
1418 input_dev->close = mxt_input_close;
1419
1420 data->client = client;
1421 data->input_dev = input_dev;
1422 data->pdata = pdata;
1423 data->irq = client->irq;
1424
1425 init_completion(&data->bl_completion);
1426 init_completion(&data->reset_completion);
1427 init_completion(&data->crc_completion);
1428
1429 error = mxt_initialize(data);
1430 if (error)
1431 goto err_free_mem;
1432
1433 __set_bit(EV_ABS, input_dev->evbit);
1434 __set_bit(EV_KEY, input_dev->evbit);
1435 __set_bit(BTN_TOUCH, input_dev->keybit);
1436
1437 if (pdata->t19_num_keys) {
1438 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1439
1440 for (i = 0; i < pdata->t19_num_keys; i++)
1441 if (pdata->t19_keymap[i] != KEY_RESERVED)
1442 input_set_capability(input_dev, EV_KEY,
1443 pdata->t19_keymap[i]);
1444
1445 mt_flags |= INPUT_MT_POINTER;
1446
1447 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1448 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1449 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1450 MXT_PIXELS_PER_MM);
1451 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1452 MXT_PIXELS_PER_MM);
1453
1454 input_dev->name = "Atmel maXTouch Touchpad";
1455 }
1456
1457 /* For single touch */
1458 input_set_abs_params(input_dev, ABS_X,
1459 0, data->max_x, 0, 0);
1460 input_set_abs_params(input_dev, ABS_Y,
1461 0, data->max_y, 0, 0);
1462 input_set_abs_params(input_dev, ABS_PRESSURE,
1463 0, 255, 0, 0);
1464
1465 /* For multi touch */
1466 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1467 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1468 if (error)
1469 goto err_free_object;
1470 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1471 0, MXT_MAX_AREA, 0, 0);
1472 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1473 0, data->max_x, 0, 0);
1474 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1475 0, data->max_y, 0, 0);
1476 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1477 0, 255, 0, 0);
1478
1479 input_set_drvdata(input_dev, data);
1480 i2c_set_clientdata(client, data);
1481
1482 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1483 pdata->irqflags | IRQF_ONESHOT,
1484 client->name, data);
1485 if (error) {
1486 dev_err(&client->dev, "Failed to register interrupt\n");
1487 goto err_free_object;
1488 }
1489
1490 error = mxt_make_highchg(data);
1491 if (error)
1492 goto err_free_irq;
1493
1494 error = input_register_device(input_dev);
1495 if (error) {
1496 dev_err(&client->dev, "Error %d registering input device\n",
1497 error);
1498 goto err_free_irq;
1499 }
1500
1501 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1502 if (error) {
1503 dev_err(&client->dev, "Failure %d creating sysfs group\n",
1504 error);
1505 goto err_unregister_device;
1506 }
1507
1508 return 0;
1509
1510 err_unregister_device:
1511 input_unregister_device(input_dev);
1512 input_dev = NULL;
1513 err_free_irq:
1514 free_irq(client->irq, data);
1515 err_free_object:
1516 kfree(data->object_table);
1517 err_free_mem:
1518 input_free_device(input_dev);
1519 kfree(data);
1520 return error;
1521 }
1522
1523 static int mxt_remove(struct i2c_client *client)
1524 {
1525 struct mxt_data *data = i2c_get_clientdata(client);
1526
1527 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1528 free_irq(data->irq, data);
1529 input_unregister_device(data->input_dev);
1530 kfree(data->object_table);
1531 kfree(data);
1532
1533 return 0;
1534 }
1535
1536 #ifdef CONFIG_PM_SLEEP
1537 static int mxt_suspend(struct device *dev)
1538 {
1539 struct i2c_client *client = to_i2c_client(dev);
1540 struct mxt_data *data = i2c_get_clientdata(client);
1541 struct input_dev *input_dev = data->input_dev;
1542
1543 mutex_lock(&input_dev->mutex);
1544
1545 if (input_dev->users)
1546 mxt_stop(data);
1547
1548 mutex_unlock(&input_dev->mutex);
1549
1550 return 0;
1551 }
1552
1553 static int mxt_resume(struct device *dev)
1554 {
1555 struct i2c_client *client = to_i2c_client(dev);
1556 struct mxt_data *data = i2c_get_clientdata(client);
1557 struct input_dev *input_dev = data->input_dev;
1558
1559 mxt_soft_reset(data);
1560
1561 mutex_lock(&input_dev->mutex);
1562
1563 if (input_dev->users)
1564 mxt_start(data);
1565
1566 mutex_unlock(&input_dev->mutex);
1567
1568 return 0;
1569 }
1570 #endif
1571
1572 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1573
1574 static const struct i2c_device_id mxt_id[] = {
1575 { "qt602240_ts", 0 },
1576 { "atmel_mxt_ts", 0 },
1577 { "atmel_mxt_tp", 0 },
1578 { "mXT224", 0 },
1579 { }
1580 };
1581 MODULE_DEVICE_TABLE(i2c, mxt_id);
1582
1583 static struct i2c_driver mxt_driver = {
1584 .driver = {
1585 .name = "atmel_mxt_ts",
1586 .owner = THIS_MODULE,
1587 .pm = &mxt_pm_ops,
1588 },
1589 .probe = mxt_probe,
1590 .remove = mxt_remove,
1591 .id_table = mxt_id,
1592 };
1593
1594 module_i2c_driver(mxt_driver);
1595
1596 /* Module information */
1597 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1598 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1599 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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