projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / blob
? search:


0986fa46e9dfb20c2834e4b92d9526d0352a2505
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / drivers / input / touchscreen / atmel_mxt_ts.c
1 /*
2 * Atmel maXTouch Touchscreen driver
3 *
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 */
13
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/firmware.h>
18 #include <linux/i2c.h>
19 #include <linux/i2c/atmel_mxt_ts.h>
20 #include <linux/input.h>
21 #include <linux/interrupt.h>
22 #include <linux/slab.h>
23
24 /* Version */
25 #define MXT_VER_20 20
26 #define MXT_VER_21 21
27 #define MXT_VER_22 22
28
29 /* Slave addresses */
30 #define MXT_APP_LOW 0x4a
31 #define MXT_APP_HIGH 0x4b
32 #define MXT_BOOT_LOW 0x24
33 #define MXT_BOOT_HIGH 0x25
34
35 /* Firmware */
36 #define MXT_FW_NAME "maxtouch.fw"
37
38 /* Registers */
39 #define MXT_FAMILY_ID 0x00
40 #define MXT_VARIANT_ID 0x01
41 #define MXT_VERSION 0x02
42 #define MXT_BUILD 0x03
43 #define MXT_MATRIX_X_SIZE 0x04
44 #define MXT_MATRIX_Y_SIZE 0x05
45 #define MXT_OBJECT_NUM 0x06
46 #define MXT_OBJECT_START 0x07
47
48 #define MXT_OBJECT_SIZE 6
49
50 /* Object types */
51 #define MXT_DEBUG_DIAGNOSTIC 37
52 #define MXT_GEN_MESSAGE 5
53 #define MXT_GEN_COMMAND 6
54 #define MXT_GEN_POWER 7
55 #define MXT_GEN_ACQUIRE 8
56 #define MXT_TOUCH_MULTI 9
57 #define MXT_TOUCH_KEYARRAY 15
58 #define MXT_TOUCH_PROXIMITY 23
59 #define MXT_PROCI_GRIPFACE 20
60 #define MXT_PROCG_NOISE 22
61 #define MXT_PROCI_ONETOUCH 24
62 #define MXT_PROCI_TWOTOUCH 27
63 #define MXT_SPT_COMMSCONFIG 18
64 #define MXT_SPT_GPIOPWM 19
65 #define MXT_SPT_SELFTEST 25
66 #define MXT_SPT_CTECONFIG 28
67 #define MXT_SPT_USERDATA 38
68
69 /* MXT_GEN_COMMAND field */
70 #define MXT_COMMAND_RESET 0
71 #define MXT_COMMAND_BACKUPNV 1
72 #define MXT_COMMAND_CALIBRATE 2
73 #define MXT_COMMAND_REPORTALL 3
74 #define MXT_COMMAND_DIAGNOSTIC 5
75
76 /* MXT_GEN_POWER field */
77 #define MXT_POWER_IDLEACQINT 0
78 #define MXT_POWER_ACTVACQINT 1
79 #define MXT_POWER_ACTV2IDLETO 2
80
81 /* MXT_GEN_ACQUIRE field */
82 #define MXT_ACQUIRE_CHRGTIME 0
83 #define MXT_ACQUIRE_TCHDRIFT 2
84 #define MXT_ACQUIRE_DRIFTST 3
85 #define MXT_ACQUIRE_TCHAUTOCAL 4
86 #define MXT_ACQUIRE_SYNC 5
87 #define MXT_ACQUIRE_ATCHCALST 6
88 #define MXT_ACQUIRE_ATCHCALSTHR 7
89
90 /* MXT_TOUCH_MULTI field */
91 #define MXT_TOUCH_CTRL 0
92 #define MXT_TOUCH_XORIGIN 1
93 #define MXT_TOUCH_YORIGIN 2
94 #define MXT_TOUCH_XSIZE 3
95 #define MXT_TOUCH_YSIZE 4
96 #define MXT_TOUCH_BLEN 6
97 #define MXT_TOUCH_TCHTHR 7
98 #define MXT_TOUCH_TCHDI 8
99 #define MXT_TOUCH_ORIENT 9
100 #define MXT_TOUCH_MOVHYSTI 11
101 #define MXT_TOUCH_MOVHYSTN 12
102 #define MXT_TOUCH_NUMTOUCH 14
103 #define MXT_TOUCH_MRGHYST 15
104 #define MXT_TOUCH_MRGTHR 16
105 #define MXT_TOUCH_AMPHYST 17
106 #define MXT_TOUCH_XRANGE_LSB 18
107 #define MXT_TOUCH_XRANGE_MSB 19
108 #define MXT_TOUCH_YRANGE_LSB 20
109 #define MXT_TOUCH_YRANGE_MSB 21
110 #define MXT_TOUCH_XLOCLIP 22
111 #define MXT_TOUCH_XHICLIP 23
112 #define MXT_TOUCH_YLOCLIP 24
113 #define MXT_TOUCH_YHICLIP 25
114 #define MXT_TOUCH_XEDGECTRL 26
115 #define MXT_TOUCH_XEDGEDIST 27
116 #define MXT_TOUCH_YEDGECTRL 28
117 #define MXT_TOUCH_YEDGEDIST 29
118 #define MXT_TOUCH_JUMPLIMIT 30
119
120 /* MXT_PROCI_GRIPFACE field */
121 #define MXT_GRIPFACE_CTRL 0
122 #define MXT_GRIPFACE_XLOGRIP 1
123 #define MXT_GRIPFACE_XHIGRIP 2
124 #define MXT_GRIPFACE_YLOGRIP 3
125 #define MXT_GRIPFACE_YHIGRIP 4
126 #define MXT_GRIPFACE_MAXTCHS 5
127 #define MXT_GRIPFACE_SZTHR1 7
128 #define MXT_GRIPFACE_SZTHR2 8
129 #define MXT_GRIPFACE_SHPTHR1 9
130 #define MXT_GRIPFACE_SHPTHR2 10
131 #define MXT_GRIPFACE_SUPEXTTO 11
132
133 /* MXT_PROCI_NOISE field */
134 #define MXT_NOISE_CTRL 0
135 #define MXT_NOISE_OUTFLEN 1
136 #define MXT_NOISE_GCAFUL_LSB 3
137 #define MXT_NOISE_GCAFUL_MSB 4
138 #define MXT_NOISE_GCAFLL_LSB 5
139 #define MXT_NOISE_GCAFLL_MSB 6
140 #define MXT_NOISE_ACTVGCAFVALID 7
141 #define MXT_NOISE_NOISETHR 8
142 #define MXT_NOISE_FREQHOPSCALE 10
143 #define MXT_NOISE_FREQ0 11
144 #define MXT_NOISE_FREQ1 12
145 #define MXT_NOISE_FREQ2 13
146 #define MXT_NOISE_FREQ3 14
147 #define MXT_NOISE_FREQ4 15
148 #define MXT_NOISE_IDLEGCAFVALID 16
149
150 /* MXT_SPT_COMMSCONFIG */
151 #define MXT_COMMS_CTRL 0
152 #define MXT_COMMS_CMD 1
153
154 /* MXT_SPT_CTECONFIG field */
155 #define MXT_CTE_CTRL 0
156 #define MXT_CTE_CMD 1
157 #define MXT_CTE_MODE 2
158 #define MXT_CTE_IDLEGCAFDEPTH 3
159 #define MXT_CTE_ACTVGCAFDEPTH 4
160 #define MXT_CTE_VOLTAGE 5
161
162 #define MXT_VOLTAGE_DEFAULT 2700000
163 #define MXT_VOLTAGE_STEP 10000
164
165 /* Define for MXT_GEN_COMMAND */
166 #define MXT_BOOT_VALUE 0xa5
167 #define MXT_BACKUP_VALUE 0x55
168 #define MXT_BACKUP_TIME 25 /* msec */
169 #define MXT_RESET_TIME 65 /* msec */
170
171 #define MXT_FWRESET_TIME 175 /* msec */
172
173 /* Command to unlock bootloader */
174 #define MXT_UNLOCK_CMD_MSB 0xaa
175 #define MXT_UNLOCK_CMD_LSB 0xdc
176
177 /* Bootloader mode status */
178 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
179 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
180 #define MXT_FRAME_CRC_CHECK 0x02
181 #define MXT_FRAME_CRC_FAIL 0x03
182 #define MXT_FRAME_CRC_PASS 0x04
183 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
184 #define MXT_BOOT_STATUS_MASK 0x3f
185
186 /* Touch status */
187 #define MXT_SUPPRESS (1 << 1)
188 #define MXT_AMP (1 << 2)
189 #define MXT_VECTOR (1 << 3)
190 #define MXT_MOVE (1 << 4)
191 #define MXT_RELEASE (1 << 5)
192 #define MXT_PRESS (1 << 6)
193 #define MXT_DETECT (1 << 7)
194
195 /* Touchscreen absolute values */
196 #define MXT_MAX_XC 0x3ff
197 #define MXT_MAX_YC 0x3ff
198 #define MXT_MAX_AREA 0xff
199
200 #define MXT_MAX_FINGER 10
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;
216 u8 instances;
217 u8 num_report_ids;
218
219 /* to map object and message */
220 u8 max_reportid;
221 };
222
223 struct mxt_message {
224 u8 reportid;
225 u8 message[7];
226 u8 checksum;
227 };
228
229 struct mxt_finger {
230 int status;
231 int x;
232 int y;
233 int area;
234 };
235
236 /* Each client has this additional data */
237 struct mxt_data {
238 struct i2c_client *client;
239 struct input_dev *input_dev;
240 const struct mxt_platform_data *pdata;
241 struct mxt_object *object_table;
242 struct mxt_info info;
243 struct mxt_finger finger[MXT_MAX_FINGER];
244 unsigned int irq;
245 };
246
247 static bool mxt_object_readable(unsigned int type)
248 {
249 switch (type) {
250 case MXT_GEN_MESSAGE:
251 case MXT_GEN_COMMAND:
252 case MXT_GEN_POWER:
253 case MXT_GEN_ACQUIRE:
254 case MXT_TOUCH_MULTI:
255 case MXT_TOUCH_KEYARRAY:
256 case MXT_TOUCH_PROXIMITY:
257 case MXT_PROCI_GRIPFACE:
258 case MXT_PROCG_NOISE:
259 case MXT_PROCI_ONETOUCH:
260 case MXT_PROCI_TWOTOUCH:
261 case MXT_SPT_COMMSCONFIG:
262 case MXT_SPT_GPIOPWM:
263 case MXT_SPT_SELFTEST:
264 case MXT_SPT_CTECONFIG:
265 case MXT_SPT_USERDATA:
266 return true;
267 default:
268 return false;
269 }
270 }
271
272 static bool mxt_object_writable(unsigned int type)
273 {
274 switch (type) {
275 case MXT_GEN_COMMAND:
276 case MXT_GEN_POWER:
277 case MXT_GEN_ACQUIRE:
278 case MXT_TOUCH_MULTI:
279 case MXT_TOUCH_KEYARRAY:
280 case MXT_TOUCH_PROXIMITY:
281 case MXT_PROCI_GRIPFACE:
282 case MXT_PROCG_NOISE:
283 case MXT_PROCI_ONETOUCH:
284 case MXT_PROCI_TWOTOUCH:
285 case MXT_SPT_GPIOPWM:
286 case MXT_SPT_SELFTEST:
287 case MXT_SPT_CTECONFIG:
288 return true;
289 default:
290 return false;
291 }
292 }
293
294 static void mxt_dump_message(struct device *dev,
295 struct mxt_message *message)
296 {
297 dev_dbg(dev, "reportid:\t0x%x\n", message->reportid);
298 dev_dbg(dev, "message1:\t0x%x\n", message->message[0]);
299 dev_dbg(dev, "message2:\t0x%x\n", message->message[1]);
300 dev_dbg(dev, "message3:\t0x%x\n", message->message[2]);
301 dev_dbg(dev, "message4:\t0x%x\n", message->message[3]);
302 dev_dbg(dev, "message5:\t0x%x\n", message->message[4]);
303 dev_dbg(dev, "message6:\t0x%x\n", message->message[5]);
304 dev_dbg(dev, "message7:\t0x%x\n", message->message[6]);
305 dev_dbg(dev, "checksum:\t0x%x\n", message->checksum);
306 }
307
308 static int mxt_check_bootloader(struct i2c_client *client,
309 unsigned int state)
310 {
311 u8 val;
312
313 recheck:
314 if (i2c_master_recv(client, &val, 1) != 1) {
315 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
316 return -EIO;
317 }
318
319 switch (state) {
320 case MXT_WAITING_BOOTLOAD_CMD:
321 case MXT_WAITING_FRAME_DATA:
322 val &= ~MXT_BOOT_STATUS_MASK;
323 break;
324 case MXT_FRAME_CRC_PASS:
325 if (val == MXT_FRAME_CRC_CHECK)
326 goto recheck;
327 break;
328 default:
329 return -EINVAL;
330 }
331
332 if (val != state) {
333 dev_err(&client->dev, "Unvalid bootloader mode state\n");
334 return -EINVAL;
335 }
336
337 return 0;
338 }
339
340 static int mxt_unlock_bootloader(struct i2c_client *client)
341 {
342 u8 buf[2];
343
344 buf[0] = MXT_UNLOCK_CMD_LSB;
345 buf[1] = MXT_UNLOCK_CMD_MSB;
346
347 if (i2c_master_send(client, buf, 2) != 2) {
348 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
349 return -EIO;
350 }
351
352 return 0;
353 }
354
355 static int mxt_fw_write(struct i2c_client *client,
356 const u8 *data, unsigned int frame_size)
357 {
358 if (i2c_master_send(client, data, frame_size) != frame_size) {
359 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
360 return -EIO;
361 }
362
363 return 0;
364 }
365
366 static int __mxt_read_reg(struct i2c_client *client,
367 u16 reg, u16 len, void *val)
368 {
369 struct i2c_msg xfer[2];
370 u8 buf[2];
371
372 buf[0] = reg & 0xff;
373 buf[1] = (reg >> 8) & 0xff;
374
375 /* Write register */
376 xfer[0].addr = client->addr;
377 xfer[0].flags = 0;
378 xfer[0].len = 2;
379 xfer[0].buf = buf;
380
381 /* Read data */
382 xfer[1].addr = client->addr;
383 xfer[1].flags = I2C_M_RD;
384 xfer[1].len = len;
385 xfer[1].buf = val;
386
387 if (i2c_transfer(client->adapter, xfer, 2) != 2) {
388 dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
389 return -EIO;
390 }
391
392 return 0;
393 }
394
395 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
396 {
397 return __mxt_read_reg(client, reg, 1, val);
398 }
399
400 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
401 {
402 u8 buf[3];
403
404 buf[0] = reg & 0xff;
405 buf[1] = (reg >> 8) & 0xff;
406 buf[2] = val;
407
408 if (i2c_master_send(client, buf, 3) != 3) {
409 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
410 return -EIO;
411 }
412
413 return 0;
414 }
415
416 static int mxt_read_object_table(struct i2c_client *client,
417 u16 reg, u8 *object_buf)
418 {
419 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
420 object_buf);
421 }
422
423 static struct mxt_object *
424 mxt_get_object(struct mxt_data *data, u8 type)
425 {
426 struct mxt_object *object;
427 int i;
428
429 for (i = 0; i < data->info.object_num; i++) {
430 object = data->object_table + i;
431 if (object->type == type)
432 return object;
433 }
434
435 dev_err(&data->client->dev, "Invalid object type\n");
436 return NULL;
437 }
438
439 static int mxt_read_message(struct mxt_data *data,
440 struct mxt_message *message)
441 {
442 struct mxt_object *object;
443 u16 reg;
444
445 object = mxt_get_object(data, MXT_GEN_MESSAGE);
446 if (!object)
447 return -EINVAL;
448
449 reg = object->start_address;
450 return __mxt_read_reg(data->client, reg,
451 sizeof(struct mxt_message), message);
452 }
453
454 static int mxt_read_object(struct mxt_data *data,
455 u8 type, u8 offset, u8 *val)
456 {
457 struct mxt_object *object;
458 u16 reg;
459
460 object = mxt_get_object(data, type);
461 if (!object)
462 return -EINVAL;
463
464 reg = object->start_address;
465 return __mxt_read_reg(data->client, reg + offset, 1, val);
466 }
467
468 static int mxt_write_object(struct mxt_data *data,
469 u8 type, u8 offset, u8 val)
470 {
471 struct mxt_object *object;
472 u16 reg;
473
474 object = mxt_get_object(data, type);
475 if (!object)
476 return -EINVAL;
477
478 reg = object->start_address;
479 return mxt_write_reg(data->client, reg + offset, val);
480 }
481
482 static void mxt_input_report(struct mxt_data *data, int single_id)
483 {
484 struct mxt_finger *finger = data->finger;
485 struct input_dev *input_dev = data->input_dev;
486 int status = finger[single_id].status;
487 int finger_num = 0;
488 int id;
489
490 for (id = 0; id < MXT_MAX_FINGER; id++) {
491 if (!finger[id].status)
492 continue;
493
494 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
495 finger[id].status != MXT_RELEASE ?
496 finger[id].area : 0);
497 input_report_abs(input_dev, ABS_MT_POSITION_X,
498 finger[id].x);
499 input_report_abs(input_dev, ABS_MT_POSITION_Y,
500 finger[id].y);
501 input_mt_sync(input_dev);
502
503 if (finger[id].status == MXT_RELEASE)
504 finger[id].status = 0;
505 else
506 finger_num++;
507 }
508
509 input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
510
511 if (status != MXT_RELEASE) {
512 input_report_abs(input_dev, ABS_X, finger[single_id].x);
513 input_report_abs(input_dev, ABS_Y, finger[single_id].y);
514 }
515
516 input_sync(input_dev);
517 }
518
519 static void mxt_input_touchevent(struct mxt_data *data,
520 struct mxt_message *message, int id)
521 {
522 struct mxt_finger *finger = data->finger;
523 struct device *dev = &data->client->dev;
524 u8 status = message->message[0];
525 int x;
526 int y;
527 int area;
528
529 /* Check the touch is present on the screen */
530 if (!(status & MXT_DETECT)) {
531 if (status & MXT_RELEASE) {
532 dev_dbg(dev, "[%d] released\n", id);
533
534 finger[id].status = MXT_RELEASE;
535 mxt_input_report(data, id);
536 }
537 return;
538 }
539
540 /* Check only AMP detection */
541 if (!(status & (MXT_PRESS | MXT_MOVE)))
542 return;
543
544 x = (message->message[1] << 2) | ((message->message[3] & ~0x3f) >> 6);
545 y = (message->message[2] << 2) | ((message->message[3] & ~0xf3) >> 2);
546 area = message->message[4];
547
548 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
549 status & MXT_MOVE ? "moved" : "pressed",
550 x, y, area);
551
552 finger[id].status = status & MXT_MOVE ?
553 MXT_MOVE : MXT_PRESS;
554 finger[id].x = x;
555 finger[id].y = y;
556 finger[id].area = area;
557
558 mxt_input_report(data, id);
559 }
560
561 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
562 {
563 struct mxt_data *data = dev_id;
564 struct mxt_message message;
565 struct mxt_object *object;
566 struct device *dev = &data->client->dev;
567 int id;
568 u8 reportid;
569 u8 max_reportid;
570 u8 min_reportid;
571
572 do {
573 if (mxt_read_message(data, &message)) {
574 dev_err(dev, "Failed to read message\n");
575 goto end;
576 }
577
578 reportid = message.reportid;
579
580 /* whether reportid is thing of MXT_TOUCH_MULTI */
581 object = mxt_get_object(data, MXT_TOUCH_MULTI);
582 if (!object)
583 goto end;
584
585 max_reportid = object->max_reportid;
586 min_reportid = max_reportid - object->num_report_ids + 1;
587 id = reportid - min_reportid;
588
589 if (reportid >= min_reportid && reportid <= max_reportid)
590 mxt_input_touchevent(data, &message, id);
591 else
592 mxt_dump_message(dev, &message);
593 } while (reportid != 0xff);
594
595 end:
596 return IRQ_HANDLED;
597 }
598
599 static int mxt_check_reg_init(struct mxt_data *data)
600 {
601 const struct mxt_platform_data *pdata = data->pdata;
602 struct mxt_object *object;
603 struct device *dev = &data->client->dev;
604 int index = 0;
605 int i, j, config_offset;
606
607 if (!pdata->config) {
608 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
609 return 0;
610 }
611
612 for (i = 0; i < data->info.object_num; i++) {
613 object = data->object_table + i;
614
615 if (!mxt_object_writable(object->type))
616 continue;
617
618 for (j = 0; j < object->size + 1; j++) {
619 config_offset = index + j;
620 if (config_offset > pdata->config_length) {
621 dev_err(dev, "Not enough config data!\n");
622 return -EINVAL;
623 }
624 mxt_write_object(data, object->type, j,
625 pdata->config[config_offset]);
626 }
627 index += object->size + 1;
628 }
629
630 return 0;
631 }
632
633 static int mxt_make_highchg(struct mxt_data *data)
634 {
635 struct device *dev = &data->client->dev;
636 struct mxt_message message;
637 int count = 10;
638 int error;
639
640 /* Read dummy message to make high CHG pin */
641 do {
642 error = mxt_read_message(data, &message);
643 if (error)
644 return error;
645 } while (message.reportid != 0xff && --count);
646
647 if (!count) {
648 dev_err(dev, "CHG pin isn't cleared\n");
649 return -EBUSY;
650 }
651
652 return 0;
653 }
654
655 static void mxt_handle_pdata(struct mxt_data *data)
656 {
657 const struct mxt_platform_data *pdata = data->pdata;
658 u8 voltage;
659
660 /* Set touchscreen lines */
661 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE,
662 pdata->x_line);
663 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE,
664 pdata->y_line);
665
666 /* Set touchscreen orient */
667 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT,
668 pdata->orient);
669
670 /* Set touchscreen burst length */
671 mxt_write_object(data, MXT_TOUCH_MULTI,
672 MXT_TOUCH_BLEN, pdata->blen);
673
674 /* Set touchscreen threshold */
675 mxt_write_object(data, MXT_TOUCH_MULTI,
676 MXT_TOUCH_TCHTHR, pdata->threshold);
677
678 /* Set touchscreen resolution */
679 mxt_write_object(data, MXT_TOUCH_MULTI,
680 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
681 mxt_write_object(data, MXT_TOUCH_MULTI,
682 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
683 mxt_write_object(data, MXT_TOUCH_MULTI,
684 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
685 mxt_write_object(data, MXT_TOUCH_MULTI,
686 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
687
688 /* Set touchscreen voltage */
689 if (pdata->voltage) {
690 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
691 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
692 MXT_VOLTAGE_STEP;
693 voltage = 0xff - voltage + 1;
694 } else
695 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
696 MXT_VOLTAGE_STEP;
697
698 mxt_write_object(data, MXT_SPT_CTECONFIG,
699 MXT_CTE_VOLTAGE, voltage);
700 }
701 }
702
703 static int mxt_get_info(struct mxt_data *data)
704 {
705 struct i2c_client *client = data->client;
706 struct mxt_info *info = &data->info;
707 int error;
708 u8 val;
709
710 error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
711 if (error)
712 return error;
713 info->family_id = val;
714
715 error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
716 if (error)
717 return error;
718 info->variant_id = val;
719
720 error = mxt_read_reg(client, MXT_VERSION, &val);
721 if (error)
722 return error;
723 info->version = val;
724
725 error = mxt_read_reg(client, MXT_BUILD, &val);
726 if (error)
727 return error;
728 info->build = val;
729
730 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
731 if (error)
732 return error;
733 info->object_num = val;
734
735 return 0;
736 }
737
738 static int mxt_get_object_table(struct mxt_data *data)
739 {
740 int error;
741 int i;
742 u16 reg;
743 u8 reportid = 0;
744 u8 buf[MXT_OBJECT_SIZE];
745
746 for (i = 0; i < data->info.object_num; i++) {
747 struct mxt_object *object = data->object_table + i;
748
749 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
750 error = mxt_read_object_table(data->client, reg, buf);
751 if (error)
752 return error;
753
754 object->type = buf[0];
755 object->start_address = (buf[2] << 8) | buf[1];
756 object->size = buf[3];
757 object->instances = buf[4];
758 object->num_report_ids = buf[5];
759
760 if (object->num_report_ids) {
761 reportid += object->num_report_ids *
762 (object->instances + 1);
763 object->max_reportid = reportid;
764 }
765 }
766
767 return 0;
768 }
769
770 static int mxt_initialize(struct mxt_data *data)
771 {
772 struct i2c_client *client = data->client;
773 struct mxt_info *info = &data->info;
774 int error;
775 u8 val;
776
777 error = mxt_get_info(data);
778 if (error)
779 return error;
780
781 data->object_table = kcalloc(info->object_num,
782 sizeof(struct mxt_object),
783 GFP_KERNEL);
784 if (!data->object_table) {
785 dev_err(&client->dev, "Failed to allocate memory\n");
786 return -ENOMEM;
787 }
788
789 /* Get object table information */
790 error = mxt_get_object_table(data);
791 if (error)
792 return error;
793
794 /* Check register init values */
795 error = mxt_check_reg_init(data);
796 if (error)
797 return error;
798
799 error = mxt_make_highchg(data);
800 if (error)
801 return error;
802
803 mxt_handle_pdata(data);
804
805 /* Backup to memory */
806 mxt_write_object(data, MXT_GEN_COMMAND,
807 MXT_COMMAND_BACKUPNV,
808 MXT_BACKUP_VALUE);
809 msleep(MXT_BACKUP_TIME);
810
811 /* Soft reset */
812 mxt_write_object(data, MXT_GEN_COMMAND,
813 MXT_COMMAND_RESET, 1);
814 msleep(MXT_RESET_TIME);
815
816 /* Update matrix size at info struct */
817 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
818 if (error)
819 return error;
820 info->matrix_xsize = val;
821
822 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
823 if (error)
824 return error;
825 info->matrix_ysize = val;
826
827 dev_info(&client->dev,
828 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
829 info->family_id, info->variant_id, info->version,
830 info->build);
831
832 dev_info(&client->dev,
833 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
834 info->matrix_xsize, info->matrix_ysize,
835 info->object_num);
836
837 return 0;
838 }
839
840 static ssize_t mxt_object_show(struct device *dev,
841 struct device_attribute *attr, char *buf)
842 {
843 struct mxt_data *data = dev_get_drvdata(dev);
844 struct mxt_object *object;
845 int count = 0;
846 int i, j;
847 int error;
848 u8 val;
849
850 for (i = 0; i < data->info.object_num; i++) {
851 object = data->object_table + i;
852
853 count += sprintf(buf + count,
854 "Object Table Element %d(Type %d)\n",
855 i + 1, object->type);
856
857 if (!mxt_object_readable(object->type)) {
858 count += sprintf(buf + count, "\n");
859 continue;
860 }
861
862 for (j = 0; j < object->size + 1; j++) {
863 error = mxt_read_object(data,
864 object->type, j, &val);
865 if (error)
866 return error;
867
868 count += sprintf(buf + count,
869 " Byte %d: 0x%x (%d)\n", j, val, val);
870 }
871
872 count += sprintf(buf + count, "\n");
873 }
874
875 return count;
876 }
877
878 static int mxt_load_fw(struct device *dev, const char *fn)
879 {
880 struct mxt_data *data = dev_get_drvdata(dev);
881 struct i2c_client *client = data->client;
882 const struct firmware *fw = NULL;
883 unsigned int frame_size;
884 unsigned int pos = 0;
885 int ret;
886
887 ret = request_firmware(&fw, fn, dev);
888 if (ret) {
889 dev_err(dev, "Unable to open firmware %s\n", fn);
890 return ret;
891 }
892
893 /* Change to the bootloader mode */
894 mxt_write_object(data, MXT_GEN_COMMAND,
895 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
896 msleep(MXT_RESET_TIME);
897
898 /* Change to slave address of bootloader */
899 if (client->addr == MXT_APP_LOW)
900 client->addr = MXT_BOOT_LOW;
901 else
902 client->addr = MXT_BOOT_HIGH;
903
904 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
905 if (ret)
906 goto out;
907
908 /* Unlock bootloader */
909 mxt_unlock_bootloader(client);
910
911 while (pos < fw->size) {
912 ret = mxt_check_bootloader(client,
913 MXT_WAITING_FRAME_DATA);
914 if (ret)
915 goto out;
916
917 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
918
919 /* We should add 2 at frame size as the the firmware data is not
920 * included the CRC bytes.
921 */
922 frame_size += 2;
923
924 /* Write one frame to device */
925 mxt_fw_write(client, fw->data + pos, frame_size);
926
927 ret = mxt_check_bootloader(client,
928 MXT_FRAME_CRC_PASS);
929 if (ret)
930 goto out;
931
932 pos += frame_size;
933
934 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
935 }
936
937 out:
938 release_firmware(fw);
939
940 /* Change to slave address of application */
941 if (client->addr == MXT_BOOT_LOW)
942 client->addr = MXT_APP_LOW;
943 else
944 client->addr = MXT_APP_HIGH;
945
946 return ret;
947 }
948
949 static ssize_t mxt_update_fw_store(struct device *dev,
950 struct device_attribute *attr,
951 const char *buf, size_t count)
952 {
953 struct mxt_data *data = dev_get_drvdata(dev);
954 int error;
955
956 disable_irq(data->irq);
957
958 error = mxt_load_fw(dev, MXT_FW_NAME);
959 if (error) {
960 dev_err(dev, "The firmware update failed(%d)\n", error);
961 count = error;
962 } else {
963 dev_dbg(dev, "The firmware update succeeded\n");
964
965 /* Wait for reset */
966 msleep(MXT_FWRESET_TIME);
967
968 kfree(data->object_table);
969 data->object_table = NULL;
970
971 mxt_initialize(data);
972 }
973
974 enable_irq(data->irq);
975
976 return count;
977 }
978
979 static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
980 static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
981
982 static struct attribute *mxt_attrs[] = {
983 &dev_attr_object.attr,
984 &dev_attr_update_fw.attr,
985 NULL
986 };
987
988 static const struct attribute_group mxt_attr_group = {
989 .attrs = mxt_attrs,
990 };
991
992 static void mxt_start(struct mxt_data *data)
993 {
994 /* Touch enable */
995 mxt_write_object(data,
996 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83);
997 }
998
999 static void mxt_stop(struct mxt_data *data)
1000 {
1001 /* Touch disable */
1002 mxt_write_object(data,
1003 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
1004 }
1005
1006 static int mxt_input_open(struct input_dev *dev)
1007 {
1008 struct mxt_data *data = input_get_drvdata(dev);
1009
1010 mxt_start(data);
1011
1012 return 0;
1013 }
1014
1015 static void mxt_input_close(struct input_dev *dev)
1016 {
1017 struct mxt_data *data = input_get_drvdata(dev);
1018
1019 mxt_stop(data);
1020 }
1021
1022 static int __devinit mxt_probe(struct i2c_client *client,
1023 const struct i2c_device_id *id)
1024 {
1025 const struct mxt_platform_data *pdata = client->dev.platform_data;
1026 struct mxt_data *data;
1027 struct input_dev *input_dev;
1028 int error;
1029
1030 if (!pdata)
1031 return -EINVAL;
1032
1033 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1034 input_dev = input_allocate_device();
1035 if (!data || !input_dev) {
1036 dev_err(&client->dev, "Failed to allocate memory\n");
1037 error = -ENOMEM;
1038 goto err_free_mem;
1039 }
1040
1041 input_dev->name = "Atmel maXTouch Touchscreen";
1042 input_dev->id.bustype = BUS_I2C;
1043 input_dev->dev.parent = &client->dev;
1044 input_dev->open = mxt_input_open;
1045 input_dev->close = mxt_input_close;
1046
1047 __set_bit(EV_ABS, input_dev->evbit);
1048 __set_bit(EV_KEY, input_dev->evbit);
1049 __set_bit(BTN_TOUCH, input_dev->keybit);
1050
1051 /* For single touch */
1052 input_set_abs_params(input_dev, ABS_X,
1053 0, MXT_MAX_XC, 0, 0);
1054 input_set_abs_params(input_dev, ABS_Y,
1055 0, MXT_MAX_YC, 0, 0);
1056
1057 /* For multi touch */
1058 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1059 0, MXT_MAX_AREA, 0, 0);
1060 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1061 0, MXT_MAX_XC, 0, 0);
1062 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1063 0, MXT_MAX_YC, 0, 0);
1064
1065 input_set_drvdata(input_dev, data);
1066
1067 data->client = client;
1068 data->input_dev = input_dev;
1069 data->pdata = pdata;
1070 data->irq = client->irq;
1071
1072 i2c_set_clientdata(client, data);
1073
1074 error = mxt_initialize(data);
1075 if (error)
1076 goto err_free_object;
1077
1078 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1079 pdata->irqflags, client->dev.driver->name, data);
1080 if (error) {
1081 dev_err(&client->dev, "Failed to register interrupt\n");
1082 goto err_free_object;
1083 }
1084
1085 error = input_register_device(input_dev);
1086 if (error)
1087 goto err_free_irq;
1088
1089 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1090 if (error)
1091 goto err_unregister_device;
1092
1093 return 0;
1094
1095 err_unregister_device:
1096 input_unregister_device(input_dev);
1097 input_dev = NULL;
1098 err_free_irq:
1099 free_irq(client->irq, data);
1100 err_free_object:
1101 kfree(data->object_table);
1102 err_free_mem:
1103 input_free_device(input_dev);
1104 kfree(data);
1105 return error;
1106 }
1107
1108 static int __devexit mxt_remove(struct i2c_client *client)
1109 {
1110 struct mxt_data *data = i2c_get_clientdata(client);
1111
1112 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1113 free_irq(data->irq, data);
1114 input_unregister_device(data->input_dev);
1115 kfree(data->object_table);
1116 kfree(data);
1117
1118 return 0;
1119 }
1120
1121 #ifdef CONFIG_PM
1122 static int mxt_suspend(struct device *dev)
1123 {
1124 struct i2c_client *client = to_i2c_client(dev);
1125 struct mxt_data *data = i2c_get_clientdata(client);
1126 struct input_dev *input_dev = data->input_dev;
1127
1128 mutex_lock(&input_dev->mutex);
1129
1130 if (input_dev->users)
1131 mxt_stop(data);
1132
1133 mutex_unlock(&input_dev->mutex);
1134
1135 return 0;
1136 }
1137
1138 static int mxt_resume(struct device *dev)
1139 {
1140 struct i2c_client *client = to_i2c_client(dev);
1141 struct mxt_data *data = i2c_get_clientdata(client);
1142 struct input_dev *input_dev = data->input_dev;
1143
1144 /* Soft reset */
1145 mxt_write_object(data, MXT_GEN_COMMAND,
1146 MXT_COMMAND_RESET, 1);
1147
1148 msleep(MXT_RESET_TIME);
1149
1150 mutex_lock(&input_dev->mutex);
1151
1152 if (input_dev->users)
1153 mxt_start(data);
1154
1155 mutex_unlock(&input_dev->mutex);
1156
1157 return 0;
1158 }
1159
1160 static const struct dev_pm_ops mxt_pm_ops = {
1161 .suspend = mxt_suspend,
1162 .resume = mxt_resume,
1163 };
1164 #endif
1165
1166 static const struct i2c_device_id mxt_id[] = {
1167 { "qt602240_ts", 0 },
1168 { "atmel_mxt_ts", 0 },
1169 { "mXT224", 0 },
1170 { }
1171 };
1172 MODULE_DEVICE_TABLE(i2c, mxt_id);
1173
1174 static struct i2c_driver mxt_driver = {
1175 .driver = {
1176 .name = "atmel_mxt_ts",
1177 .owner = THIS_MODULE,
1178 #ifdef CONFIG_PM
1179 .pm = &mxt_pm_ops,
1180 #endif
1181 },
1182 .probe = mxt_probe,
1183 .remove = __devexit_p(mxt_remove),
1184 .id_table = mxt_id,
1185 };
1186
1187 static int __init mxt_init(void)
1188 {
1189 return i2c_add_driver(&mxt_driver);
1190 }
1191
1192 static void __exit mxt_exit(void)
1193 {
1194 i2c_del_driver(&mxt_driver);
1195 }
1196
1197 module_init(mxt_init);
1198 module_exit(mxt_exit);
1199
1200 /* Module information */
1201 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1202 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1203 MODULE_LICENSE("GPL");