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[GitHub/mt8127/android_kernel_alcatel_ttab.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/mt.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_T37 37
52 #define MXT_GEN_MESSAGE_T5 5
53 #define MXT_GEN_COMMAND_T6 6
54 #define MXT_GEN_POWER_T7 7
55 #define MXT_GEN_ACQUIRE_T8 8
56 #define MXT_GEN_DATASOURCE_T53 53
57 #define MXT_TOUCH_MULTI_T9 9
58 #define MXT_TOUCH_KEYARRAY_T15 15
59 #define MXT_TOUCH_PROXIMITY_T23 23
60 #define MXT_TOUCH_PROXKEY_T52 52
61 #define MXT_PROCI_GRIPFACE_T20 20
62 #define MXT_PROCG_NOISE_T22 22
63 #define MXT_PROCI_ONETOUCH_T24 24
64 #define MXT_PROCI_TWOTOUCH_T27 27
65 #define MXT_PROCI_GRIP_T40 40
66 #define MXT_PROCI_PALM_T41 41
67 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
68 #define MXT_PROCI_STYLUS_T47 47
69 #define MXT_PROCG_NOISESUPPRESSION_T48 48
70 #define MXT_SPT_COMMSCONFIG_T18 18
71 #define MXT_SPT_GPIOPWM_T19 19
72 #define MXT_SPT_SELFTEST_T25 25
73 #define MXT_SPT_CTECONFIG_T28 28
74 #define MXT_SPT_USERDATA_T38 38
75 #define MXT_SPT_DIGITIZER_T43 43
76 #define MXT_SPT_MESSAGECOUNT_T44 44
77 #define MXT_SPT_CTECONFIG_T46 46
78
79 /* MXT_GEN_COMMAND_T6 field */
80 #define MXT_COMMAND_RESET 0
81 #define MXT_COMMAND_BACKUPNV 1
82 #define MXT_COMMAND_CALIBRATE 2
83 #define MXT_COMMAND_REPORTALL 3
84 #define MXT_COMMAND_DIAGNOSTIC 5
85
86 /* MXT_GEN_POWER_T7 field */
87 #define MXT_POWER_IDLEACQINT 0
88 #define MXT_POWER_ACTVACQINT 1
89 #define MXT_POWER_ACTV2IDLETO 2
90
91 /* MXT_GEN_ACQUIRE_T8 field */
92 #define MXT_ACQUIRE_CHRGTIME 0
93 #define MXT_ACQUIRE_TCHDRIFT 2
94 #define MXT_ACQUIRE_DRIFTST 3
95 #define MXT_ACQUIRE_TCHAUTOCAL 4
96 #define MXT_ACQUIRE_SYNC 5
97 #define MXT_ACQUIRE_ATCHCALST 6
98 #define MXT_ACQUIRE_ATCHCALSTHR 7
99
100 /* MXT_TOUCH_MULTI_T9 field */
101 #define MXT_TOUCH_CTRL 0
102 #define MXT_TOUCH_XORIGIN 1
103 #define MXT_TOUCH_YORIGIN 2
104 #define MXT_TOUCH_XSIZE 3
105 #define MXT_TOUCH_YSIZE 4
106 #define MXT_TOUCH_BLEN 6
107 #define MXT_TOUCH_TCHTHR 7
108 #define MXT_TOUCH_TCHDI 8
109 #define MXT_TOUCH_ORIENT 9
110 #define MXT_TOUCH_MOVHYSTI 11
111 #define MXT_TOUCH_MOVHYSTN 12
112 #define MXT_TOUCH_NUMTOUCH 14
113 #define MXT_TOUCH_MRGHYST 15
114 #define MXT_TOUCH_MRGTHR 16
115 #define MXT_TOUCH_AMPHYST 17
116 #define MXT_TOUCH_XRANGE_LSB 18
117 #define MXT_TOUCH_XRANGE_MSB 19
118 #define MXT_TOUCH_YRANGE_LSB 20
119 #define MXT_TOUCH_YRANGE_MSB 21
120 #define MXT_TOUCH_XLOCLIP 22
121 #define MXT_TOUCH_XHICLIP 23
122 #define MXT_TOUCH_YLOCLIP 24
123 #define MXT_TOUCH_YHICLIP 25
124 #define MXT_TOUCH_XEDGECTRL 26
125 #define MXT_TOUCH_XEDGEDIST 27
126 #define MXT_TOUCH_YEDGECTRL 28
127 #define MXT_TOUCH_YEDGEDIST 29
128 #define MXT_TOUCH_JUMPLIMIT 30
129
130 /* MXT_PROCI_GRIPFACE_T20 field */
131 #define MXT_GRIPFACE_CTRL 0
132 #define MXT_GRIPFACE_XLOGRIP 1
133 #define MXT_GRIPFACE_XHIGRIP 2
134 #define MXT_GRIPFACE_YLOGRIP 3
135 #define MXT_GRIPFACE_YHIGRIP 4
136 #define MXT_GRIPFACE_MAXTCHS 5
137 #define MXT_GRIPFACE_SZTHR1 7
138 #define MXT_GRIPFACE_SZTHR2 8
139 #define MXT_GRIPFACE_SHPTHR1 9
140 #define MXT_GRIPFACE_SHPTHR2 10
141 #define MXT_GRIPFACE_SUPEXTTO 11
142
143 /* MXT_PROCI_NOISE field */
144 #define MXT_NOISE_CTRL 0
145 #define MXT_NOISE_OUTFLEN 1
146 #define MXT_NOISE_GCAFUL_LSB 3
147 #define MXT_NOISE_GCAFUL_MSB 4
148 #define MXT_NOISE_GCAFLL_LSB 5
149 #define MXT_NOISE_GCAFLL_MSB 6
150 #define MXT_NOISE_ACTVGCAFVALID 7
151 #define MXT_NOISE_NOISETHR 8
152 #define MXT_NOISE_FREQHOPSCALE 10
153 #define MXT_NOISE_FREQ0 11
154 #define MXT_NOISE_FREQ1 12
155 #define MXT_NOISE_FREQ2 13
156 #define MXT_NOISE_FREQ3 14
157 #define MXT_NOISE_FREQ4 15
158 #define MXT_NOISE_IDLEGCAFVALID 16
159
160 /* MXT_SPT_COMMSCONFIG_T18 */
161 #define MXT_COMMS_CTRL 0
162 #define MXT_COMMS_CMD 1
163
164 /* MXT_SPT_CTECONFIG_T28 field */
165 #define MXT_CTE_CTRL 0
166 #define MXT_CTE_CMD 1
167 #define MXT_CTE_MODE 2
168 #define MXT_CTE_IDLEGCAFDEPTH 3
169 #define MXT_CTE_ACTVGCAFDEPTH 4
170 #define MXT_CTE_VOLTAGE 5
171
172 #define MXT_VOLTAGE_DEFAULT 2700000
173 #define MXT_VOLTAGE_STEP 10000
174
175 /* Define for MXT_GEN_COMMAND_T6 */
176 #define MXT_BOOT_VALUE 0xa5
177 #define MXT_BACKUP_VALUE 0x55
178 #define MXT_BACKUP_TIME 25 /* msec */
179 #define MXT_RESET_TIME 65 /* msec */
180
181 #define MXT_FWRESET_TIME 175 /* msec */
182
183 /* Command to unlock bootloader */
184 #define MXT_UNLOCK_CMD_MSB 0xaa
185 #define MXT_UNLOCK_CMD_LSB 0xdc
186
187 /* Bootloader mode status */
188 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
189 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
190 #define MXT_FRAME_CRC_CHECK 0x02
191 #define MXT_FRAME_CRC_FAIL 0x03
192 #define MXT_FRAME_CRC_PASS 0x04
193 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
194 #define MXT_BOOT_STATUS_MASK 0x3f
195
196 /* Touch status */
197 #define MXT_SUPPRESS (1 << 1)
198 #define MXT_AMP (1 << 2)
199 #define MXT_VECTOR (1 << 3)
200 #define MXT_MOVE (1 << 4)
201 #define MXT_RELEASE (1 << 5)
202 #define MXT_PRESS (1 << 6)
203 #define MXT_DETECT (1 << 7)
204
205 /* Touch orient bits */
206 #define MXT_XY_SWITCH (1 << 0)
207 #define MXT_X_INVERT (1 << 1)
208 #define MXT_Y_INVERT (1 << 2)
209
210 /* Touchscreen absolute values */
211 #define MXT_MAX_AREA 0xff
212
213 #define MXT_MAX_FINGER 10
214
215 struct mxt_info {
216 u8 family_id;
217 u8 variant_id;
218 u8 version;
219 u8 build;
220 u8 matrix_xsize;
221 u8 matrix_ysize;
222 u8 object_num;
223 };
224
225 struct mxt_object {
226 u8 type;
227 u16 start_address;
228 u8 size;
229 u8 instances;
230 u8 num_report_ids;
231
232 /* to map object and message */
233 u8 max_reportid;
234 };
235
236 struct mxt_message {
237 u8 reportid;
238 u8 message[7];
239 };
240
241 struct mxt_finger {
242 int status;
243 int x;
244 int y;
245 int area;
246 int pressure;
247 };
248
249 /* Each client has this additional data */
250 struct mxt_data {
251 struct i2c_client *client;
252 struct input_dev *input_dev;
253 char phys[64]; /* device physical location */
254 const struct mxt_platform_data *pdata;
255 struct mxt_object *object_table;
256 struct mxt_info info;
257 struct mxt_finger finger[MXT_MAX_FINGER];
258 unsigned int irq;
259 unsigned int max_x;
260 unsigned int max_y;
261 };
262
263 static bool mxt_object_readable(unsigned int type)
264 {
265 switch (type) {
266 case MXT_GEN_COMMAND_T6:
267 case MXT_GEN_POWER_T7:
268 case MXT_GEN_ACQUIRE_T8:
269 case MXT_GEN_DATASOURCE_T53:
270 case MXT_TOUCH_MULTI_T9:
271 case MXT_TOUCH_KEYARRAY_T15:
272 case MXT_TOUCH_PROXIMITY_T23:
273 case MXT_TOUCH_PROXKEY_T52:
274 case MXT_PROCI_GRIPFACE_T20:
275 case MXT_PROCG_NOISE_T22:
276 case MXT_PROCI_ONETOUCH_T24:
277 case MXT_PROCI_TWOTOUCH_T27:
278 case MXT_PROCI_GRIP_T40:
279 case MXT_PROCI_PALM_T41:
280 case MXT_PROCI_TOUCHSUPPRESSION_T42:
281 case MXT_PROCI_STYLUS_T47:
282 case MXT_PROCG_NOISESUPPRESSION_T48:
283 case MXT_SPT_COMMSCONFIG_T18:
284 case MXT_SPT_GPIOPWM_T19:
285 case MXT_SPT_SELFTEST_T25:
286 case MXT_SPT_CTECONFIG_T28:
287 case MXT_SPT_USERDATA_T38:
288 case MXT_SPT_DIGITIZER_T43:
289 case MXT_SPT_CTECONFIG_T46:
290 return true;
291 default:
292 return false;
293 }
294 }
295
296 static bool mxt_object_writable(unsigned int type)
297 {
298 switch (type) {
299 case MXT_GEN_COMMAND_T6:
300 case MXT_GEN_POWER_T7:
301 case MXT_GEN_ACQUIRE_T8:
302 case MXT_TOUCH_MULTI_T9:
303 case MXT_TOUCH_KEYARRAY_T15:
304 case MXT_TOUCH_PROXIMITY_T23:
305 case MXT_TOUCH_PROXKEY_T52:
306 case MXT_PROCI_GRIPFACE_T20:
307 case MXT_PROCG_NOISE_T22:
308 case MXT_PROCI_ONETOUCH_T24:
309 case MXT_PROCI_TWOTOUCH_T27:
310 case MXT_PROCI_GRIP_T40:
311 case MXT_PROCI_PALM_T41:
312 case MXT_PROCI_TOUCHSUPPRESSION_T42:
313 case MXT_PROCI_STYLUS_T47:
314 case MXT_PROCG_NOISESUPPRESSION_T48:
315 case MXT_SPT_COMMSCONFIG_T18:
316 case MXT_SPT_GPIOPWM_T19:
317 case MXT_SPT_SELFTEST_T25:
318 case MXT_SPT_CTECONFIG_T28:
319 case MXT_SPT_DIGITIZER_T43:
320 case MXT_SPT_CTECONFIG_T46:
321 return true;
322 default:
323 return false;
324 }
325 }
326
327 static void mxt_dump_message(struct device *dev,
328 struct mxt_message *message)
329 {
330 dev_dbg(dev, "reportid: %u\tmessage: %02x %02x %02x %02x %02x %02x %02x\n",
331 message->reportid, message->message[0], message->message[1],
332 message->message[2], message->message[3], message->message[4],
333 message->message[5], message->message[6]);
334 }
335
336 static int mxt_check_bootloader(struct i2c_client *client,
337 unsigned int state)
338 {
339 u8 val;
340
341 recheck:
342 if (i2c_master_recv(client, &val, 1) != 1) {
343 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
344 return -EIO;
345 }
346
347 switch (state) {
348 case MXT_WAITING_BOOTLOAD_CMD:
349 case MXT_WAITING_FRAME_DATA:
350 val &= ~MXT_BOOT_STATUS_MASK;
351 break;
352 case MXT_FRAME_CRC_PASS:
353 if (val == MXT_FRAME_CRC_CHECK)
354 goto recheck;
355 break;
356 default:
357 return -EINVAL;
358 }
359
360 if (val != state) {
361 dev_err(&client->dev, "Unvalid bootloader mode state\n");
362 return -EINVAL;
363 }
364
365 return 0;
366 }
367
368 static int mxt_unlock_bootloader(struct i2c_client *client)
369 {
370 u8 buf[2];
371
372 buf[0] = MXT_UNLOCK_CMD_LSB;
373 buf[1] = MXT_UNLOCK_CMD_MSB;
374
375 if (i2c_master_send(client, buf, 2) != 2) {
376 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
377 return -EIO;
378 }
379
380 return 0;
381 }
382
383 static int mxt_fw_write(struct i2c_client *client,
384 const u8 *data, unsigned int frame_size)
385 {
386 if (i2c_master_send(client, data, frame_size) != frame_size) {
387 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
388 return -EIO;
389 }
390
391 return 0;
392 }
393
394 static int __mxt_read_reg(struct i2c_client *client,
395 u16 reg, u16 len, void *val)
396 {
397 struct i2c_msg xfer[2];
398 u8 buf[2];
399
400 buf[0] = reg & 0xff;
401 buf[1] = (reg >> 8) & 0xff;
402
403 /* Write register */
404 xfer[0].addr = client->addr;
405 xfer[0].flags = 0;
406 xfer[0].len = 2;
407 xfer[0].buf = buf;
408
409 /* Read data */
410 xfer[1].addr = client->addr;
411 xfer[1].flags = I2C_M_RD;
412 xfer[1].len = len;
413 xfer[1].buf = val;
414
415 if (i2c_transfer(client->adapter, xfer, 2) != 2) {
416 dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
417 return -EIO;
418 }
419
420 return 0;
421 }
422
423 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
424 {
425 return __mxt_read_reg(client, reg, 1, val);
426 }
427
428 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
429 {
430 u8 buf[3];
431
432 buf[0] = reg & 0xff;
433 buf[1] = (reg >> 8) & 0xff;
434 buf[2] = val;
435
436 if (i2c_master_send(client, buf, 3) != 3) {
437 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
438 return -EIO;
439 }
440
441 return 0;
442 }
443
444 static int mxt_read_object_table(struct i2c_client *client,
445 u16 reg, u8 *object_buf)
446 {
447 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
448 object_buf);
449 }
450
451 static struct mxt_object *
452 mxt_get_object(struct mxt_data *data, u8 type)
453 {
454 struct mxt_object *object;
455 int i;
456
457 for (i = 0; i < data->info.object_num; i++) {
458 object = data->object_table + i;
459 if (object->type == type)
460 return object;
461 }
462
463 dev_err(&data->client->dev, "Invalid object type\n");
464 return NULL;
465 }
466
467 static int mxt_read_message(struct mxt_data *data,
468 struct mxt_message *message)
469 {
470 struct mxt_object *object;
471 u16 reg;
472
473 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
474 if (!object)
475 return -EINVAL;
476
477 reg = object->start_address;
478 return __mxt_read_reg(data->client, reg,
479 sizeof(struct mxt_message), message);
480 }
481
482 static int mxt_read_object(struct mxt_data *data,
483 u8 type, u8 offset, u8 *val)
484 {
485 struct mxt_object *object;
486 u16 reg;
487
488 object = mxt_get_object(data, type);
489 if (!object)
490 return -EINVAL;
491
492 reg = object->start_address;
493 return __mxt_read_reg(data->client, reg + offset, 1, val);
494 }
495
496 static int mxt_write_object(struct mxt_data *data,
497 u8 type, u8 offset, u8 val)
498 {
499 struct mxt_object *object;
500 u16 reg;
501
502 object = mxt_get_object(data, type);
503 if (!object || offset >= object->size + 1)
504 return -EINVAL;
505
506 reg = object->start_address;
507 return mxt_write_reg(data->client, reg + offset, val);
508 }
509
510 static void mxt_input_report(struct mxt_data *data, int single_id)
511 {
512 struct mxt_finger *finger = data->finger;
513 struct input_dev *input_dev = data->input_dev;
514 int status = finger[single_id].status;
515 int finger_num = 0;
516 int id;
517
518 for (id = 0; id < MXT_MAX_FINGER; id++) {
519 if (!finger[id].status)
520 continue;
521
522 input_mt_slot(input_dev, id);
523 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
524 finger[id].status != MXT_RELEASE);
525
526 if (finger[id].status != MXT_RELEASE) {
527 finger_num++;
528 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
529 finger[id].area);
530 input_report_abs(input_dev, ABS_MT_POSITION_X,
531 finger[id].x);
532 input_report_abs(input_dev, ABS_MT_POSITION_Y,
533 finger[id].y);
534 input_report_abs(input_dev, ABS_MT_PRESSURE,
535 finger[id].pressure);
536 } else {
537 finger[id].status = 0;
538 }
539 }
540
541 input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
542
543 if (status != MXT_RELEASE) {
544 input_report_abs(input_dev, ABS_X, finger[single_id].x);
545 input_report_abs(input_dev, ABS_Y, finger[single_id].y);
546 input_report_abs(input_dev,
547 ABS_PRESSURE, finger[single_id].pressure);
548 }
549
550 input_sync(input_dev);
551 }
552
553 static void mxt_input_touchevent(struct mxt_data *data,
554 struct mxt_message *message, int id)
555 {
556 struct mxt_finger *finger = data->finger;
557 struct device *dev = &data->client->dev;
558 u8 status = message->message[0];
559 int x;
560 int y;
561 int area;
562 int pressure;
563
564 /* Check the touch is present on the screen */
565 if (!(status & MXT_DETECT)) {
566 if (status & MXT_RELEASE) {
567 dev_dbg(dev, "[%d] released\n", id);
568
569 finger[id].status = MXT_RELEASE;
570 mxt_input_report(data, id);
571 }
572 return;
573 }
574
575 /* Check only AMP detection */
576 if (!(status & (MXT_PRESS | MXT_MOVE)))
577 return;
578
579 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
580 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
581 if (data->max_x < 1024)
582 x = x >> 2;
583 if (data->max_y < 1024)
584 y = y >> 2;
585
586 area = message->message[4];
587 pressure = message->message[5];
588
589 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
590 status & MXT_MOVE ? "moved" : "pressed",
591 x, y, area);
592
593 finger[id].status = status & MXT_MOVE ?
594 MXT_MOVE : MXT_PRESS;
595 finger[id].x = x;
596 finger[id].y = y;
597 finger[id].area = area;
598 finger[id].pressure = pressure;
599
600 mxt_input_report(data, id);
601 }
602
603 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
604 {
605 struct mxt_data *data = dev_id;
606 struct mxt_message message;
607 struct mxt_object *object;
608 struct device *dev = &data->client->dev;
609 int id;
610 u8 reportid;
611 u8 max_reportid;
612 u8 min_reportid;
613
614 do {
615 if (mxt_read_message(data, &message)) {
616 dev_err(dev, "Failed to read message\n");
617 goto end;
618 }
619
620 reportid = message.reportid;
621
622 /* whether reportid is thing of MXT_TOUCH_MULTI_T9 */
623 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
624 if (!object)
625 goto end;
626
627 max_reportid = object->max_reportid;
628 min_reportid = max_reportid - object->num_report_ids + 1;
629 id = reportid - min_reportid;
630
631 if (reportid >= min_reportid && reportid <= max_reportid)
632 mxt_input_touchevent(data, &message, id);
633 else
634 mxt_dump_message(dev, &message);
635 } while (reportid != 0xff);
636
637 end:
638 return IRQ_HANDLED;
639 }
640
641 static int mxt_check_reg_init(struct mxt_data *data)
642 {
643 const struct mxt_platform_data *pdata = data->pdata;
644 struct mxt_object *object;
645 struct device *dev = &data->client->dev;
646 int index = 0;
647 int i, j, config_offset;
648
649 if (!pdata->config) {
650 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
651 return 0;
652 }
653
654 for (i = 0; i < data->info.object_num; i++) {
655 object = data->object_table + i;
656
657 if (!mxt_object_writable(object->type))
658 continue;
659
660 for (j = 0;
661 j < (object->size + 1) * (object->instances + 1);
662 j++) {
663 config_offset = index + j;
664 if (config_offset > pdata->config_length) {
665 dev_err(dev, "Not enough config data!\n");
666 return -EINVAL;
667 }
668 mxt_write_object(data, object->type, j,
669 pdata->config[config_offset]);
670 }
671 index += (object->size + 1) * (object->instances + 1);
672 }
673
674 return 0;
675 }
676
677 static int mxt_make_highchg(struct mxt_data *data)
678 {
679 struct device *dev = &data->client->dev;
680 struct mxt_message message;
681 int count = 10;
682 int error;
683
684 /* Read dummy message to make high CHG pin */
685 do {
686 error = mxt_read_message(data, &message);
687 if (error)
688 return error;
689 } while (message.reportid != 0xff && --count);
690
691 if (!count) {
692 dev_err(dev, "CHG pin isn't cleared\n");
693 return -EBUSY;
694 }
695
696 return 0;
697 }
698
699 static void mxt_handle_pdata(struct mxt_data *data)
700 {
701 const struct mxt_platform_data *pdata = data->pdata;
702 u8 voltage;
703
704 /* Set touchscreen lines */
705 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
706 pdata->x_line);
707 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
708 pdata->y_line);
709
710 /* Set touchscreen orient */
711 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
712 pdata->orient);
713
714 /* Set touchscreen burst length */
715 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
716 MXT_TOUCH_BLEN, pdata->blen);
717
718 /* Set touchscreen threshold */
719 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
720 MXT_TOUCH_TCHTHR, pdata->threshold);
721
722 /* Set touchscreen resolution */
723 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
724 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
725 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
726 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
727 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
728 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
729 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
730 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
731
732 /* Set touchscreen voltage */
733 if (pdata->voltage) {
734 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
735 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
736 MXT_VOLTAGE_STEP;
737 voltage = 0xff - voltage + 1;
738 } else
739 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
740 MXT_VOLTAGE_STEP;
741
742 mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
743 MXT_CTE_VOLTAGE, voltage);
744 }
745 }
746
747 static int mxt_get_info(struct mxt_data *data)
748 {
749 struct i2c_client *client = data->client;
750 struct mxt_info *info = &data->info;
751 int error;
752 u8 val;
753
754 error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
755 if (error)
756 return error;
757 info->family_id = val;
758
759 error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
760 if (error)
761 return error;
762 info->variant_id = val;
763
764 error = mxt_read_reg(client, MXT_VERSION, &val);
765 if (error)
766 return error;
767 info->version = val;
768
769 error = mxt_read_reg(client, MXT_BUILD, &val);
770 if (error)
771 return error;
772 info->build = val;
773
774 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
775 if (error)
776 return error;
777 info->object_num = val;
778
779 return 0;
780 }
781
782 static int mxt_get_object_table(struct mxt_data *data)
783 {
784 int error;
785 int i;
786 u16 reg;
787 u8 reportid = 0;
788 u8 buf[MXT_OBJECT_SIZE];
789
790 for (i = 0; i < data->info.object_num; i++) {
791 struct mxt_object *object = data->object_table + i;
792
793 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
794 error = mxt_read_object_table(data->client, reg, buf);
795 if (error)
796 return error;
797
798 object->type = buf[0];
799 object->start_address = (buf[2] << 8) | buf[1];
800 object->size = buf[3];
801 object->instances = buf[4];
802 object->num_report_ids = buf[5];
803
804 if (object->num_report_ids) {
805 reportid += object->num_report_ids *
806 (object->instances + 1);
807 object->max_reportid = reportid;
808 }
809 }
810
811 return 0;
812 }
813
814 static int mxt_initialize(struct mxt_data *data)
815 {
816 struct i2c_client *client = data->client;
817 struct mxt_info *info = &data->info;
818 int error;
819 u8 val;
820
821 error = mxt_get_info(data);
822 if (error)
823 return error;
824
825 data->object_table = kcalloc(info->object_num,
826 sizeof(struct mxt_object),
827 GFP_KERNEL);
828 if (!data->object_table) {
829 dev_err(&client->dev, "Failed to allocate memory\n");
830 return -ENOMEM;
831 }
832
833 /* Get object table information */
834 error = mxt_get_object_table(data);
835 if (error)
836 return error;
837
838 /* Check register init values */
839 error = mxt_check_reg_init(data);
840 if (error)
841 return error;
842
843 mxt_handle_pdata(data);
844
845 /* Backup to memory */
846 mxt_write_object(data, MXT_GEN_COMMAND_T6,
847 MXT_COMMAND_BACKUPNV,
848 MXT_BACKUP_VALUE);
849 msleep(MXT_BACKUP_TIME);
850
851 /* Soft reset */
852 mxt_write_object(data, MXT_GEN_COMMAND_T6,
853 MXT_COMMAND_RESET, 1);
854 msleep(MXT_RESET_TIME);
855
856 /* Update matrix size at info struct */
857 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
858 if (error)
859 return error;
860 info->matrix_xsize = val;
861
862 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
863 if (error)
864 return error;
865 info->matrix_ysize = val;
866
867 dev_info(&client->dev,
868 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
869 info->family_id, info->variant_id, info->version,
870 info->build);
871
872 dev_info(&client->dev,
873 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
874 info->matrix_xsize, info->matrix_ysize,
875 info->object_num);
876
877 return 0;
878 }
879
880 static void mxt_calc_resolution(struct mxt_data *data)
881 {
882 unsigned int max_x = data->pdata->x_size - 1;
883 unsigned int max_y = data->pdata->y_size - 1;
884
885 if (data->pdata->orient & MXT_XY_SWITCH) {
886 data->max_x = max_y;
887 data->max_y = max_x;
888 } else {
889 data->max_x = max_x;
890 data->max_y = max_y;
891 }
892 }
893
894 static ssize_t mxt_object_show(struct device *dev,
895 struct device_attribute *attr, char *buf)
896 {
897 struct mxt_data *data = dev_get_drvdata(dev);
898 struct mxt_object *object;
899 int count = 0;
900 int i, j;
901 int error;
902 u8 val;
903
904 for (i = 0; i < data->info.object_num; i++) {
905 object = data->object_table + i;
906
907 count += snprintf(buf + count, PAGE_SIZE - count,
908 "Object[%d] (Type %d)\n",
909 i + 1, object->type);
910 if (count >= PAGE_SIZE)
911 return PAGE_SIZE - 1;
912
913 if (!mxt_object_readable(object->type)) {
914 count += snprintf(buf + count, PAGE_SIZE - count,
915 "\n");
916 if (count >= PAGE_SIZE)
917 return PAGE_SIZE - 1;
918 continue;
919 }
920
921 for (j = 0; j < object->size + 1; j++) {
922 error = mxt_read_object(data,
923 object->type, j, &val);
924 if (error)
925 return error;
926
927 count += snprintf(buf + count, PAGE_SIZE - count,
928 "\t[%2d]: %02x (%d)\n", j, val, val);
929 if (count >= PAGE_SIZE)
930 return PAGE_SIZE - 1;
931 }
932
933 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
934 if (count >= PAGE_SIZE)
935 return PAGE_SIZE - 1;
936 }
937
938 return count;
939 }
940
941 static int mxt_load_fw(struct device *dev, const char *fn)
942 {
943 struct mxt_data *data = dev_get_drvdata(dev);
944 struct i2c_client *client = data->client;
945 const struct firmware *fw = NULL;
946 unsigned int frame_size;
947 unsigned int pos = 0;
948 int ret;
949
950 ret = request_firmware(&fw, fn, dev);
951 if (ret) {
952 dev_err(dev, "Unable to open firmware %s\n", fn);
953 return ret;
954 }
955
956 /* Change to the bootloader mode */
957 mxt_write_object(data, MXT_GEN_COMMAND_T6,
958 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
959 msleep(MXT_RESET_TIME);
960
961 /* Change to slave address of bootloader */
962 if (client->addr == MXT_APP_LOW)
963 client->addr = MXT_BOOT_LOW;
964 else
965 client->addr = MXT_BOOT_HIGH;
966
967 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
968 if (ret)
969 goto out;
970
971 /* Unlock bootloader */
972 mxt_unlock_bootloader(client);
973
974 while (pos < fw->size) {
975 ret = mxt_check_bootloader(client,
976 MXT_WAITING_FRAME_DATA);
977 if (ret)
978 goto out;
979
980 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
981
982 /* We should add 2 at frame size as the the firmware data is not
983 * included the CRC bytes.
984 */
985 frame_size += 2;
986
987 /* Write one frame to device */
988 mxt_fw_write(client, fw->data + pos, frame_size);
989
990 ret = mxt_check_bootloader(client,
991 MXT_FRAME_CRC_PASS);
992 if (ret)
993 goto out;
994
995 pos += frame_size;
996
997 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
998 }
999
1000 out:
1001 release_firmware(fw);
1002
1003 /* Change to slave address of application */
1004 if (client->addr == MXT_BOOT_LOW)
1005 client->addr = MXT_APP_LOW;
1006 else
1007 client->addr = MXT_APP_HIGH;
1008
1009 return ret;
1010 }
1011
1012 static ssize_t mxt_update_fw_store(struct device *dev,
1013 struct device_attribute *attr,
1014 const char *buf, size_t count)
1015 {
1016 struct mxt_data *data = dev_get_drvdata(dev);
1017 int error;
1018
1019 disable_irq(data->irq);
1020
1021 error = mxt_load_fw(dev, MXT_FW_NAME);
1022 if (error) {
1023 dev_err(dev, "The firmware update failed(%d)\n", error);
1024 count = error;
1025 } else {
1026 dev_dbg(dev, "The firmware update succeeded\n");
1027
1028 /* Wait for reset */
1029 msleep(MXT_FWRESET_TIME);
1030
1031 kfree(data->object_table);
1032 data->object_table = NULL;
1033
1034 mxt_initialize(data);
1035 }
1036
1037 enable_irq(data->irq);
1038
1039 error = mxt_make_highchg(data);
1040 if (error)
1041 return error;
1042
1043 return count;
1044 }
1045
1046 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1047 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1048
1049 static struct attribute *mxt_attrs[] = {
1050 &dev_attr_object.attr,
1051 &dev_attr_update_fw.attr,
1052 NULL
1053 };
1054
1055 static const struct attribute_group mxt_attr_group = {
1056 .attrs = mxt_attrs,
1057 };
1058
1059 static void mxt_start(struct mxt_data *data)
1060 {
1061 /* Touch enable */
1062 mxt_write_object(data,
1063 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1064 }
1065
1066 static void mxt_stop(struct mxt_data *data)
1067 {
1068 /* Touch disable */
1069 mxt_write_object(data,
1070 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1071 }
1072
1073 static int mxt_input_open(struct input_dev *dev)
1074 {
1075 struct mxt_data *data = input_get_drvdata(dev);
1076
1077 mxt_start(data);
1078
1079 return 0;
1080 }
1081
1082 static void mxt_input_close(struct input_dev *dev)
1083 {
1084 struct mxt_data *data = input_get_drvdata(dev);
1085
1086 mxt_stop(data);
1087 }
1088
1089 static int __devinit mxt_probe(struct i2c_client *client,
1090 const struct i2c_device_id *id)
1091 {
1092 const struct mxt_platform_data *pdata = client->dev.platform_data;
1093 struct mxt_data *data;
1094 struct input_dev *input_dev;
1095 int error;
1096
1097 if (!pdata)
1098 return -EINVAL;
1099
1100 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1101 input_dev = input_allocate_device();
1102 if (!data || !input_dev) {
1103 dev_err(&client->dev, "Failed to allocate memory\n");
1104 error = -ENOMEM;
1105 goto err_free_mem;
1106 }
1107
1108 input_dev->name = "Atmel maXTouch Touchscreen";
1109 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1110 client->adapter->nr, client->addr);
1111 input_dev->phys = data->phys;
1112
1113 input_dev->id.bustype = BUS_I2C;
1114 input_dev->dev.parent = &client->dev;
1115 input_dev->open = mxt_input_open;
1116 input_dev->close = mxt_input_close;
1117
1118 data->client = client;
1119 data->input_dev = input_dev;
1120 data->pdata = pdata;
1121 data->irq = client->irq;
1122
1123 mxt_calc_resolution(data);
1124
1125 __set_bit(EV_ABS, input_dev->evbit);
1126 __set_bit(EV_KEY, input_dev->evbit);
1127 __set_bit(BTN_TOUCH, input_dev->keybit);
1128
1129 /* For single touch */
1130 input_set_abs_params(input_dev, ABS_X,
1131 0, data->max_x, 0, 0);
1132 input_set_abs_params(input_dev, ABS_Y,
1133 0, data->max_y, 0, 0);
1134 input_set_abs_params(input_dev, ABS_PRESSURE,
1135 0, 255, 0, 0);
1136
1137 /* For multi touch */
1138 error = input_mt_init_slots(input_dev, MXT_MAX_FINGER);
1139 if (error)
1140 goto err_free_mem;
1141 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1142 0, MXT_MAX_AREA, 0, 0);
1143 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1144 0, data->max_x, 0, 0);
1145 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1146 0, data->max_y, 0, 0);
1147 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1148 0, 255, 0, 0);
1149
1150 input_set_drvdata(input_dev, data);
1151 i2c_set_clientdata(client, data);
1152
1153 error = mxt_initialize(data);
1154 if (error)
1155 goto err_free_object;
1156
1157 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1158 pdata->irqflags, client->name, data);
1159 if (error) {
1160 dev_err(&client->dev, "Failed to register interrupt\n");
1161 goto err_free_object;
1162 }
1163
1164 error = mxt_make_highchg(data);
1165 if (error)
1166 goto err_free_irq;
1167
1168 error = input_register_device(input_dev);
1169 if (error)
1170 goto err_free_irq;
1171
1172 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1173 if (error)
1174 dev_warn(&client->dev, "error creating sysfs entries.\n");
1175
1176 return 0;
1177
1178 err_free_irq:
1179 free_irq(client->irq, data);
1180 err_free_object:
1181 kfree(data->object_table);
1182 err_free_mem:
1183 input_free_device(input_dev);
1184 kfree(data);
1185 return error;
1186 }
1187
1188 static int __devexit mxt_remove(struct i2c_client *client)
1189 {
1190 struct mxt_data *data = i2c_get_clientdata(client);
1191
1192 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1193 free_irq(data->irq, data);
1194 input_unregister_device(data->input_dev);
1195 kfree(data->object_table);
1196 kfree(data);
1197
1198 return 0;
1199 }
1200
1201 #ifdef CONFIG_PM_SLEEP
1202 static int mxt_suspend(struct device *dev)
1203 {
1204 struct i2c_client *client = to_i2c_client(dev);
1205 struct mxt_data *data = i2c_get_clientdata(client);
1206 struct input_dev *input_dev = data->input_dev;
1207
1208 mutex_lock(&input_dev->mutex);
1209
1210 if (input_dev->users)
1211 mxt_stop(data);
1212
1213 mutex_unlock(&input_dev->mutex);
1214
1215 return 0;
1216 }
1217
1218 static int mxt_resume(struct device *dev)
1219 {
1220 struct i2c_client *client = to_i2c_client(dev);
1221 struct mxt_data *data = i2c_get_clientdata(client);
1222 struct input_dev *input_dev = data->input_dev;
1223
1224 /* Soft reset */
1225 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1226 MXT_COMMAND_RESET, 1);
1227
1228 msleep(MXT_RESET_TIME);
1229
1230 mutex_lock(&input_dev->mutex);
1231
1232 if (input_dev->users)
1233 mxt_start(data);
1234
1235 mutex_unlock(&input_dev->mutex);
1236
1237 return 0;
1238 }
1239 #endif
1240
1241 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1242
1243 static const struct i2c_device_id mxt_id[] = {
1244 { "qt602240_ts", 0 },
1245 { "atmel_mxt_ts", 0 },
1246 { "mXT224", 0 },
1247 { }
1248 };
1249 MODULE_DEVICE_TABLE(i2c, mxt_id);
1250
1251 static struct i2c_driver mxt_driver = {
1252 .driver = {
1253 .name = "atmel_mxt_ts",
1254 .owner = THIS_MODULE,
1255 .pm = &mxt_pm_ops,
1256 },
1257 .probe = mxt_probe,
1258 .remove = __devexit_p(mxt_remove),
1259 .id_table = mxt_id,
1260 };
1261
1262 module_i2c_driver(mxt_driver);
1263
1264 /* Module information */
1265 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1266 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1267 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)