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Merge remote-tracking branch 'cleancache/linux-next'
[linux-2.6/next.git] / drivers / input / touchscreen / atmel_mxt_ts.c
blob1e61387c73cafa01f40825a710427414a4a7e2aa
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 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_PROCI_GRIP 40
64 #define MXT_PROCI_PALM 41
65 #define MXT_SPT_COMMSCONFIG 18
66 #define MXT_SPT_GPIOPWM 19
67 #define MXT_SPT_SELFTEST 25
68 #define MXT_SPT_CTECONFIG 28
69 #define MXT_SPT_USERDATA 38
70 #define MXT_SPT_DIGITIZER 43
71 #define MXT_SPT_MESSAGECOUNT 44
72
73 /* MXT_GEN_COMMAND field */
74 #define MXT_COMMAND_RESET 0
75 #define MXT_COMMAND_BACKUPNV 1
76 #define MXT_COMMAND_CALIBRATE 2
77 #define MXT_COMMAND_REPORTALL 3
78 #define MXT_COMMAND_DIAGNOSTIC 5
79
80 /* MXT_GEN_POWER field */
81 #define MXT_POWER_IDLEACQINT 0
82 #define MXT_POWER_ACTVACQINT 1
83 #define MXT_POWER_ACTV2IDLETO 2
84
85 /* MXT_GEN_ACQUIRE field */
86 #define MXT_ACQUIRE_CHRGTIME 0
87 #define MXT_ACQUIRE_TCHDRIFT 2
88 #define MXT_ACQUIRE_DRIFTST 3
89 #define MXT_ACQUIRE_TCHAUTOCAL 4
90 #define MXT_ACQUIRE_SYNC 5
91 #define MXT_ACQUIRE_ATCHCALST 6
92 #define MXT_ACQUIRE_ATCHCALSTHR 7
93
94 /* MXT_TOUCH_MULTI field */
95 #define MXT_TOUCH_CTRL 0
96 #define MXT_TOUCH_XORIGIN 1
97 #define MXT_TOUCH_YORIGIN 2
98 #define MXT_TOUCH_XSIZE 3
99 #define MXT_TOUCH_YSIZE 4
100 #define MXT_TOUCH_BLEN 6
101 #define MXT_TOUCH_TCHTHR 7
102 #define MXT_TOUCH_TCHDI 8
103 #define MXT_TOUCH_ORIENT 9
104 #define MXT_TOUCH_MOVHYSTI 11
105 #define MXT_TOUCH_MOVHYSTN 12
106 #define MXT_TOUCH_NUMTOUCH 14
107 #define MXT_TOUCH_MRGHYST 15
108 #define MXT_TOUCH_MRGTHR 16
109 #define MXT_TOUCH_AMPHYST 17
110 #define MXT_TOUCH_XRANGE_LSB 18
111 #define MXT_TOUCH_XRANGE_MSB 19
112 #define MXT_TOUCH_YRANGE_LSB 20
113 #define MXT_TOUCH_YRANGE_MSB 21
114 #define MXT_TOUCH_XLOCLIP 22
115 #define MXT_TOUCH_XHICLIP 23
116 #define MXT_TOUCH_YLOCLIP 24
117 #define MXT_TOUCH_YHICLIP 25
118 #define MXT_TOUCH_XEDGECTRL 26
119 #define MXT_TOUCH_XEDGEDIST 27
120 #define MXT_TOUCH_YEDGECTRL 28
121 #define MXT_TOUCH_YEDGEDIST 29
122 #define MXT_TOUCH_JUMPLIMIT 30
123
124 /* MXT_PROCI_GRIPFACE field */
125 #define MXT_GRIPFACE_CTRL 0
126 #define MXT_GRIPFACE_XLOGRIP 1
127 #define MXT_GRIPFACE_XHIGRIP 2
128 #define MXT_GRIPFACE_YLOGRIP 3
129 #define MXT_GRIPFACE_YHIGRIP 4
130 #define MXT_GRIPFACE_MAXTCHS 5
131 #define MXT_GRIPFACE_SZTHR1 7
132 #define MXT_GRIPFACE_SZTHR2 8
133 #define MXT_GRIPFACE_SHPTHR1 9
134 #define MXT_GRIPFACE_SHPTHR2 10
135 #define MXT_GRIPFACE_SUPEXTTO 11
136
137 /* MXT_PROCI_NOISE field */
138 #define MXT_NOISE_CTRL 0
139 #define MXT_NOISE_OUTFLEN 1
140 #define MXT_NOISE_GCAFUL_LSB 3
141 #define MXT_NOISE_GCAFUL_MSB 4
142 #define MXT_NOISE_GCAFLL_LSB 5
143 #define MXT_NOISE_GCAFLL_MSB 6
144 #define MXT_NOISE_ACTVGCAFVALID 7
145 #define MXT_NOISE_NOISETHR 8
146 #define MXT_NOISE_FREQHOPSCALE 10
147 #define MXT_NOISE_FREQ0 11
148 #define MXT_NOISE_FREQ1 12
149 #define MXT_NOISE_FREQ2 13
150 #define MXT_NOISE_FREQ3 14
151 #define MXT_NOISE_FREQ4 15
152 #define MXT_NOISE_IDLEGCAFVALID 16
153
154 /* MXT_SPT_COMMSCONFIG */
155 #define MXT_COMMS_CTRL 0
156 #define MXT_COMMS_CMD 1
157
158 /* MXT_SPT_CTECONFIG field */
159 #define MXT_CTE_CTRL 0
160 #define MXT_CTE_CMD 1
161 #define MXT_CTE_MODE 2
162 #define MXT_CTE_IDLEGCAFDEPTH 3
163 #define MXT_CTE_ACTVGCAFDEPTH 4
164 #define MXT_CTE_VOLTAGE 5
165
166 #define MXT_VOLTAGE_DEFAULT 2700000
167 #define MXT_VOLTAGE_STEP 10000
168
169 /* Define for MXT_GEN_COMMAND */
170 #define MXT_BOOT_VALUE 0xa5
171 #define MXT_BACKUP_VALUE 0x55
172 #define MXT_BACKUP_TIME 25 /* msec */
173 #define MXT_RESET_TIME 65 /* msec */
174
175 #define MXT_FWRESET_TIME 175 /* msec */
176
177 /* Command to unlock bootloader */
178 #define MXT_UNLOCK_CMD_MSB 0xaa
179 #define MXT_UNLOCK_CMD_LSB 0xdc
180
181 /* Bootloader mode status */
182 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
183 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
184 #define MXT_FRAME_CRC_CHECK 0x02
185 #define MXT_FRAME_CRC_FAIL 0x03
186 #define MXT_FRAME_CRC_PASS 0x04
187 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
188 #define MXT_BOOT_STATUS_MASK 0x3f
189
190 /* Touch status */
191 #define MXT_SUPPRESS (1 << 1)
192 #define MXT_AMP (1 << 2)
193 #define MXT_VECTOR (1 << 3)
194 #define MXT_MOVE (1 << 4)
195 #define MXT_RELEASE (1 << 5)
196 #define MXT_PRESS (1 << 6)
197 #define MXT_DETECT (1 << 7)
198
199 /* Touch orient bits */
200 #define MXT_XY_SWITCH (1 << 0)
201 #define MXT_X_INVERT (1 << 1)
202 #define MXT_Y_INVERT (1 << 2)
203
204 /* Touchscreen absolute values */
205 #define MXT_MAX_AREA 0xff
206
207 #define MXT_MAX_FINGER 10
208
209 struct mxt_info {
210 u8 family_id;
211 u8 variant_id;
212 u8 version;
213 u8 build;
214 u8 matrix_xsize;
215 u8 matrix_ysize;
216 u8 object_num;
217 };
218
219 struct mxt_object {
220 u8 type;
221 u16 start_address;
222 u8 size;
223 u8 instances;
224 u8 num_report_ids;
225
226 /* to map object and message */
227 u8 max_reportid;
228 };
229
230 struct mxt_message {
231 u8 reportid;
232 u8 message[7];
233 u8 checksum;
234 };
235
236 struct mxt_finger {
237 int status;
238 int x;
239 int y;
240 int area;
241 };
242
243 /* Each client has this additional data */
244 struct mxt_data {
245 struct i2c_client *client;
246 struct input_dev *input_dev;
247 const struct mxt_platform_data *pdata;
248 struct mxt_object *object_table;
249 struct mxt_info info;
250 struct mxt_finger finger[MXT_MAX_FINGER];
251 unsigned int irq;
252 unsigned int max_x;
253 unsigned int max_y;
254 };
255
256 static bool mxt_object_readable(unsigned int type)
257 {
258 switch (type) {
259 case MXT_GEN_MESSAGE:
260 case MXT_GEN_COMMAND:
261 case MXT_GEN_POWER:
262 case MXT_GEN_ACQUIRE:
263 case MXT_TOUCH_MULTI:
264 case MXT_TOUCH_KEYARRAY:
265 case MXT_TOUCH_PROXIMITY:
266 case MXT_PROCI_GRIPFACE:
267 case MXT_PROCG_NOISE:
268 case MXT_PROCI_ONETOUCH:
269 case MXT_PROCI_TWOTOUCH:
270 case MXT_PROCI_GRIP:
271 case MXT_PROCI_PALM:
272 case MXT_SPT_COMMSCONFIG:
273 case MXT_SPT_GPIOPWM:
274 case MXT_SPT_SELFTEST:
275 case MXT_SPT_CTECONFIG:
276 case MXT_SPT_USERDATA:
277 return true;
278 default:
279 return false;
280 }
281 }
282
283 static bool mxt_object_writable(unsigned int type)
284 {
285 switch (type) {
286 case MXT_GEN_COMMAND:
287 case MXT_GEN_POWER:
288 case MXT_GEN_ACQUIRE:
289 case MXT_TOUCH_MULTI:
290 case MXT_TOUCH_KEYARRAY:
291 case MXT_TOUCH_PROXIMITY:
292 case MXT_PROCI_GRIPFACE:
293 case MXT_PROCG_NOISE:
294 case MXT_PROCI_ONETOUCH:
295 case MXT_PROCI_TWOTOUCH:
296 case MXT_PROCI_GRIP:
297 case MXT_PROCI_PALM:
298 case MXT_SPT_GPIOPWM:
299 case MXT_SPT_SELFTEST:
300 case MXT_SPT_CTECONFIG:
301 return true;
302 default:
303 return false;
304 }
305 }
306
307 static void mxt_dump_message(struct device *dev,
308 struct mxt_message *message)
309 {
310 dev_dbg(dev, "reportid:\t0x%x\n", message->reportid);
311 dev_dbg(dev, "message1:\t0x%x\n", message->message[0]);
312 dev_dbg(dev, "message2:\t0x%x\n", message->message[1]);
313 dev_dbg(dev, "message3:\t0x%x\n", message->message[2]);
314 dev_dbg(dev, "message4:\t0x%x\n", message->message[3]);
315 dev_dbg(dev, "message5:\t0x%x\n", message->message[4]);
316 dev_dbg(dev, "message6:\t0x%x\n", message->message[5]);
317 dev_dbg(dev, "message7:\t0x%x\n", message->message[6]);
318 dev_dbg(dev, "checksum:\t0x%x\n", message->checksum);
319 }
320
321 static int mxt_check_bootloader(struct i2c_client *client,
322 unsigned int state)
323 {
324 u8 val;
325
326 recheck:
327 if (i2c_master_recv(client, &val, 1) != 1) {
328 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
329 return -EIO;
330 }
331
332 switch (state) {
333 case MXT_WAITING_BOOTLOAD_CMD:
334 case MXT_WAITING_FRAME_DATA:
335 val &= ~MXT_BOOT_STATUS_MASK;
336 break;
337 case MXT_FRAME_CRC_PASS:
338 if (val == MXT_FRAME_CRC_CHECK)
339 goto recheck;
340 break;
341 default:
342 return -EINVAL;
343 }
344
345 if (val != state) {
346 dev_err(&client->dev, "Unvalid bootloader mode state\n");
347 return -EINVAL;
348 }
349
350 return 0;
351 }
352
353 static int mxt_unlock_bootloader(struct i2c_client *client)
354 {
355 u8 buf[2];
356
357 buf[0] = MXT_UNLOCK_CMD_LSB;
358 buf[1] = MXT_UNLOCK_CMD_MSB;
359
360 if (i2c_master_send(client, buf, 2) != 2) {
361 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
362 return -EIO;
363 }
364
365 return 0;
366 }
367
368 static int mxt_fw_write(struct i2c_client *client,
369 const u8 *data, unsigned int frame_size)
370 {
371 if (i2c_master_send(client, data, frame_size) != frame_size) {
372 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
373 return -EIO;
374 }
375
376 return 0;
377 }
378
379 static int __mxt_read_reg(struct i2c_client *client,
380 u16 reg, u16 len, void *val)
381 {
382 struct i2c_msg xfer[2];
383 u8 buf[2];
384
385 buf[0] = reg & 0xff;
386 buf[1] = (reg >> 8) & 0xff;
387
388 /* Write register */
389 xfer[0].addr = client->addr;
390 xfer[0].flags = 0;
391 xfer[0].len = 2;
392 xfer[0].buf = buf;
393
394 /* Read data */
395 xfer[1].addr = client->addr;
396 xfer[1].flags = I2C_M_RD;
397 xfer[1].len = len;
398 xfer[1].buf = val;
399
400 if (i2c_transfer(client->adapter, xfer, 2) != 2) {
401 dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
402 return -EIO;
403 }
404
405 return 0;
406 }
407
408 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
409 {
410 return __mxt_read_reg(client, reg, 1, val);
411 }
412
413 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
414 {
415 u8 buf[3];
416
417 buf[0] = reg & 0xff;
418 buf[1] = (reg >> 8) & 0xff;
419 buf[2] = val;
420
421 if (i2c_master_send(client, buf, 3) != 3) {
422 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
423 return -EIO;
424 }
425
426 return 0;
427 }
428
429 static int mxt_read_object_table(struct i2c_client *client,
430 u16 reg, u8 *object_buf)
431 {
432 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
433 object_buf);
434 }
435
436 static struct mxt_object *
437 mxt_get_object(struct mxt_data *data, u8 type)
438 {
439 struct mxt_object *object;
440 int i;
441
442 for (i = 0; i < data->info.object_num; i++) {
443 object = data->object_table + i;
444 if (object->type == type)
445 return object;
446 }
447
448 dev_err(&data->client->dev, "Invalid object type\n");
449 return NULL;
450 }
451
452 static int mxt_read_message(struct mxt_data *data,
453 struct mxt_message *message)
454 {
455 struct mxt_object *object;
456 u16 reg;
457
458 object = mxt_get_object(data, MXT_GEN_MESSAGE);
459 if (!object)
460 return -EINVAL;
461
462 reg = object->start_address;
463 return __mxt_read_reg(data->client, reg,
464 sizeof(struct mxt_message), message);
465 }
466
467 static int mxt_read_object(struct mxt_data *data,
468 u8 type, u8 offset, u8 *val)
469 {
470 struct mxt_object *object;
471 u16 reg;
472
473 object = mxt_get_object(data, type);
474 if (!object)
475 return -EINVAL;
476
477 reg = object->start_address;
478 return __mxt_read_reg(data->client, reg + offset, 1, val);
479 }
480
481 static int mxt_write_object(struct mxt_data *data,
482 u8 type, u8 offset, u8 val)
483 {
484 struct mxt_object *object;
485 u16 reg;
486
487 object = mxt_get_object(data, type);
488 if (!object)
489 return -EINVAL;
490
491 reg = object->start_address;
492 return mxt_write_reg(data->client, reg + offset, val);
493 }
494
495 static void mxt_input_report(struct mxt_data *data, int single_id)
496 {
497 struct mxt_finger *finger = data->finger;
498 struct input_dev *input_dev = data->input_dev;
499 int status = finger[single_id].status;
500 int finger_num = 0;
501 int id;
502
503 for (id = 0; id < MXT_MAX_FINGER; id++) {
504 if (!finger[id].status)
505 continue;
506
507 input_mt_slot(input_dev, id);
508 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
509 finger[id].status != MXT_RELEASE);
510
511 if (finger[id].status != MXT_RELEASE) {
512 finger_num++;
513 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
514 finger[id].area);
515 input_report_abs(input_dev, ABS_MT_POSITION_X,
516 finger[id].x);
517 input_report_abs(input_dev, ABS_MT_POSITION_Y,
518 finger[id].y);
519 } else {
520 finger[id].status = 0;
521 }
522 }
523
524 input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
525
526 if (status != MXT_RELEASE) {
527 input_report_abs(input_dev, ABS_X, finger[single_id].x);
528 input_report_abs(input_dev, ABS_Y, finger[single_id].y);
529 }
530
531 input_sync(input_dev);
532 }
533
534 static void mxt_input_touchevent(struct mxt_data *data,
535 struct mxt_message *message, int id)
536 {
537 struct mxt_finger *finger = data->finger;
538 struct device *dev = &data->client->dev;
539 u8 status = message->message[0];
540 int x;
541 int y;
542 int area;
543
544 /* Check the touch is present on the screen */
545 if (!(status & MXT_DETECT)) {
546 if (status & MXT_RELEASE) {
547 dev_dbg(dev, "[%d] released\n", id);
548
549 finger[id].status = MXT_RELEASE;
550 mxt_input_report(data, id);
551 }
552 return;
553 }
554
555 /* Check only AMP detection */
556 if (!(status & (MXT_PRESS | MXT_MOVE)))
557 return;
558
559 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
560 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
561 if (data->max_x < 1024)
562 x = x >> 2;
563 if (data->max_y < 1024)
564 y = y >> 2;
565
566 area = message->message[4];
567
568 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
569 status & MXT_MOVE ? "moved" : "pressed",
570 x, y, area);
571
572 finger[id].status = status & MXT_MOVE ?
573 MXT_MOVE : MXT_PRESS;
574 finger[id].x = x;
575 finger[id].y = y;
576 finger[id].area = area;
577
578 mxt_input_report(data, id);
579 }
580
581 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
582 {
583 struct mxt_data *data = dev_id;
584 struct mxt_message message;
585 struct mxt_object *object;
586 struct device *dev = &data->client->dev;
587 int id;
588 u8 reportid;
589 u8 max_reportid;
590 u8 min_reportid;
591
592 do {
593 if (mxt_read_message(data, &message)) {
594 dev_err(dev, "Failed to read message\n");
595 goto end;
596 }
597
598 reportid = message.reportid;
599
600 /* whether reportid is thing of MXT_TOUCH_MULTI */
601 object = mxt_get_object(data, MXT_TOUCH_MULTI);
602 if (!object)
603 goto end;
604
605 max_reportid = object->max_reportid;
606 min_reportid = max_reportid - object->num_report_ids + 1;
607 id = reportid - min_reportid;
608
609 if (reportid >= min_reportid && reportid <= max_reportid)
610 mxt_input_touchevent(data, &message, id);
611 else
612 mxt_dump_message(dev, &message);
613 } while (reportid != 0xff);
614
615 end:
616 return IRQ_HANDLED;
617 }
618
619 static int mxt_check_reg_init(struct mxt_data *data)
620 {
621 const struct mxt_platform_data *pdata = data->pdata;
622 struct mxt_object *object;
623 struct device *dev = &data->client->dev;
624 int index = 0;
625 int i, j, config_offset;
626
627 if (!pdata->config) {
628 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
629 return 0;
630 }
631
632 for (i = 0; i < data->info.object_num; i++) {
633 object = data->object_table + i;
634
635 if (!mxt_object_writable(object->type))
636 continue;
637
638 for (j = 0; j < object->size + 1; j++) {
639 config_offset = index + j;
640 if (config_offset > pdata->config_length) {
641 dev_err(dev, "Not enough config data!\n");
642 return -EINVAL;
643 }
644 mxt_write_object(data, object->type, j,
645 pdata->config[config_offset]);
646 }
647 index += object->size + 1;
648 }
649
650 return 0;
651 }
652
653 static int mxt_make_highchg(struct mxt_data *data)
654 {
655 struct device *dev = &data->client->dev;
656 struct mxt_message message;
657 int count = 10;
658 int error;
659
660 /* Read dummy message to make high CHG pin */
661 do {
662 error = mxt_read_message(data, &message);
663 if (error)
664 return error;
665 } while (message.reportid != 0xff && --count);
666
667 if (!count) {
668 dev_err(dev, "CHG pin isn't cleared\n");
669 return -EBUSY;
670 }
671
672 return 0;
673 }
674
675 static void mxt_handle_pdata(struct mxt_data *data)
676 {
677 const struct mxt_platform_data *pdata = data->pdata;
678 u8 voltage;
679
680 /* Set touchscreen lines */
681 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE,
682 pdata->x_line);
683 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE,
684 pdata->y_line);
685
686 /* Set touchscreen orient */
687 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT,
688 pdata->orient);
689
690 /* Set touchscreen burst length */
691 mxt_write_object(data, MXT_TOUCH_MULTI,
692 MXT_TOUCH_BLEN, pdata->blen);
693
694 /* Set touchscreen threshold */
695 mxt_write_object(data, MXT_TOUCH_MULTI,
696 MXT_TOUCH_TCHTHR, pdata->threshold);
697
698 /* Set touchscreen resolution */
699 mxt_write_object(data, MXT_TOUCH_MULTI,
700 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
701 mxt_write_object(data, MXT_TOUCH_MULTI,
702 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
703 mxt_write_object(data, MXT_TOUCH_MULTI,
704 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
705 mxt_write_object(data, MXT_TOUCH_MULTI,
706 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
707
708 /* Set touchscreen voltage */
709 if (pdata->voltage) {
710 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
711 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
712 MXT_VOLTAGE_STEP;
713 voltage = 0xff - voltage + 1;
714 } else
715 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
716 MXT_VOLTAGE_STEP;
717
718 mxt_write_object(data, MXT_SPT_CTECONFIG,
719 MXT_CTE_VOLTAGE, voltage);
720 }
721 }
722
723 static int mxt_get_info(struct mxt_data *data)
724 {
725 struct i2c_client *client = data->client;
726 struct mxt_info *info = &data->info;
727 int error;
728 u8 val;
729
730 error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
731 if (error)
732 return error;
733 info->family_id = val;
734
735 error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
736 if (error)
737 return error;
738 info->variant_id = val;
739
740 error = mxt_read_reg(client, MXT_VERSION, &val);
741 if (error)
742 return error;
743 info->version = val;
744
745 error = mxt_read_reg(client, MXT_BUILD, &val);
746 if (error)
747 return error;
748 info->build = val;
749
750 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
751 if (error)
752 return error;
753 info->object_num = val;
754
755 return 0;
756 }
757
758 static int mxt_get_object_table(struct mxt_data *data)
759 {
760 int error;
761 int i;
762 u16 reg;
763 u8 reportid = 0;
764 u8 buf[MXT_OBJECT_SIZE];
765
766 for (i = 0; i < data->info.object_num; i++) {
767 struct mxt_object *object = data->object_table + i;
768
769 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
770 error = mxt_read_object_table(data->client, reg, buf);
771 if (error)
772 return error;
773
774 object->type = buf[0];
775 object->start_address = (buf[2] << 8) | buf[1];
776 object->size = buf[3];
777 object->instances = buf[4];
778 object->num_report_ids = buf[5];
779
780 if (object->num_report_ids) {
781 reportid += object->num_report_ids *
782 (object->instances + 1);
783 object->max_reportid = reportid;
784 }
785 }
786
787 return 0;
788 }
789
790 static int mxt_initialize(struct mxt_data *data)
791 {
792 struct i2c_client *client = data->client;
793 struct mxt_info *info = &data->info;
794 int error;
795 u8 val;
796
797 error = mxt_get_info(data);
798 if (error)
799 return error;
800
801 data->object_table = kcalloc(info->object_num,
802 sizeof(struct mxt_object),
803 GFP_KERNEL);
804 if (!data->object_table) {
805 dev_err(&client->dev, "Failed to allocate memory\n");
806 return -ENOMEM;
807 }
808
809 /* Get object table information */
810 error = mxt_get_object_table(data);
811 if (error)
812 return error;
813
814 /* Check register init values */
815 error = mxt_check_reg_init(data);
816 if (error)
817 return error;
818
819 mxt_handle_pdata(data);
820
821 /* Backup to memory */
822 mxt_write_object(data, MXT_GEN_COMMAND,
823 MXT_COMMAND_BACKUPNV,
824 MXT_BACKUP_VALUE);
825 msleep(MXT_BACKUP_TIME);
826
827 /* Soft reset */
828 mxt_write_object(data, MXT_GEN_COMMAND,
829 MXT_COMMAND_RESET, 1);
830 msleep(MXT_RESET_TIME);
831
832 /* Update matrix size at info struct */
833 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
834 if (error)
835 return error;
836 info->matrix_xsize = val;
837
838 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
839 if (error)
840 return error;
841 info->matrix_ysize = val;
842
843 dev_info(&client->dev,
844 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
845 info->family_id, info->variant_id, info->version,
846 info->build);
847
848 dev_info(&client->dev,
849 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
850 info->matrix_xsize, info->matrix_ysize,
851 info->object_num);
852
853 return 0;
854 }
855
856 static void mxt_calc_resolution(struct mxt_data *data)
857 {
858 unsigned int max_x = data->pdata->x_size - 1;
859 unsigned int max_y = data->pdata->y_size - 1;
860
861 if (data->pdata->orient & MXT_XY_SWITCH) {
862 data->max_x = max_y;
863 data->max_y = max_x;
864 } else {
865 data->max_x = max_x;
866 data->max_y = max_y;
867 }
868 }
869
870 static ssize_t mxt_object_show(struct device *dev,
871 struct device_attribute *attr, char *buf)
872 {
873 struct mxt_data *data = dev_get_drvdata(dev);
874 struct mxt_object *object;
875 int count = 0;
876 int i, j;
877 int error;
878 u8 val;
879
880 for (i = 0; i < data->info.object_num; i++) {
881 object = data->object_table + i;
882
883 count += sprintf(buf + count,
884 "Object Table Element %d(Type %d)\n",
885 i + 1, object->type);
886
887 if (!mxt_object_readable(object->type)) {
888 count += sprintf(buf + count, "\n");
889 continue;
890 }
891
892 for (j = 0; j < object->size + 1; j++) {
893 error = mxt_read_object(data,
894 object->type, j, &val);
895 if (error)
896 return error;
897
898 count += sprintf(buf + count,
899 " Byte %d: 0x%x (%d)\n", j, val, val);
900 }
901
902 count += sprintf(buf + count, "\n");
903 }
904
905 return count;
906 }
907
908 static int mxt_load_fw(struct device *dev, const char *fn)
909 {
910 struct mxt_data *data = dev_get_drvdata(dev);
911 struct i2c_client *client = data->client;
912 const struct firmware *fw = NULL;
913 unsigned int frame_size;
914 unsigned int pos = 0;
915 int ret;
916
917 ret = request_firmware(&fw, fn, dev);
918 if (ret) {
919 dev_err(dev, "Unable to open firmware %s\n", fn);
920 return ret;
921 }
922
923 /* Change to the bootloader mode */
924 mxt_write_object(data, MXT_GEN_COMMAND,
925 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
926 msleep(MXT_RESET_TIME);
927
928 /* Change to slave address of bootloader */
929 if (client->addr == MXT_APP_LOW)
930 client->addr = MXT_BOOT_LOW;
931 else
932 client->addr = MXT_BOOT_HIGH;
933
934 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
935 if (ret)
936 goto out;
937
938 /* Unlock bootloader */
939 mxt_unlock_bootloader(client);
940
941 while (pos < fw->size) {
942 ret = mxt_check_bootloader(client,
943 MXT_WAITING_FRAME_DATA);
944 if (ret)
945 goto out;
946
947 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
948
949 /* We should add 2 at frame size as the the firmware data is not
950 * included the CRC bytes.
951 */
952 frame_size += 2;
953
954 /* Write one frame to device */
955 mxt_fw_write(client, fw->data + pos, frame_size);
956
957 ret = mxt_check_bootloader(client,
958 MXT_FRAME_CRC_PASS);
959 if (ret)
960 goto out;
961
962 pos += frame_size;
963
964 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
965 }
966
967 out:
968 release_firmware(fw);
969
970 /* Change to slave address of application */
971 if (client->addr == MXT_BOOT_LOW)
972 client->addr = MXT_APP_LOW;
973 else
974 client->addr = MXT_APP_HIGH;
975
976 return ret;
977 }
978
979 static ssize_t mxt_update_fw_store(struct device *dev,
980 struct device_attribute *attr,
981 const char *buf, size_t count)
982 {
983 struct mxt_data *data = dev_get_drvdata(dev);
984 int error;
985
986 disable_irq(data->irq);
987
988 error = mxt_load_fw(dev, MXT_FW_NAME);
989 if (error) {
990 dev_err(dev, "The firmware update failed(%d)\n", error);
991 count = error;
992 } else {
993 dev_dbg(dev, "The firmware update succeeded\n");
994
995 /* Wait for reset */
996 msleep(MXT_FWRESET_TIME);
997
998 kfree(data->object_table);
999 data->object_table = NULL;
1000
1001 mxt_initialize(data);
1002 }
1003
1004 enable_irq(data->irq);
1005
1006 error = mxt_make_highchg(data);
1007 if (error)
1008 return error;
1009
1010 return count;
1011 }
1012
1013 static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
1014 static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
1015
1016 static struct attribute *mxt_attrs[] = {
1017 &dev_attr_object.attr,
1018 &dev_attr_update_fw.attr,
1019 NULL
1020 };
1021
1022 static const struct attribute_group mxt_attr_group = {
1023 .attrs = mxt_attrs,
1024 };
1025
1026 static void mxt_start(struct mxt_data *data)
1027 {
1028 /* Touch enable */
1029 mxt_write_object(data,
1030 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83);
1031 }
1032
1033 static void mxt_stop(struct mxt_data *data)
1034 {
1035 /* Touch disable */
1036 mxt_write_object(data,
1037 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
1038 }
1039
1040 static int mxt_input_open(struct input_dev *dev)
1041 {
1042 struct mxt_data *data = input_get_drvdata(dev);
1043
1044 mxt_start(data);
1045
1046 return 0;
1047 }
1048
1049 static void mxt_input_close(struct input_dev *dev)
1050 {
1051 struct mxt_data *data = input_get_drvdata(dev);
1052
1053 mxt_stop(data);
1054 }
1055
1056 static int __devinit mxt_probe(struct i2c_client *client,
1057 const struct i2c_device_id *id)
1058 {
1059 const struct mxt_platform_data *pdata = client->dev.platform_data;
1060 struct mxt_data *data;
1061 struct input_dev *input_dev;
1062 int error;
1063
1064 if (!pdata)
1065 return -EINVAL;
1066
1067 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1068 input_dev = input_allocate_device();
1069 if (!data || !input_dev) {
1070 dev_err(&client->dev, "Failed to allocate memory\n");
1071 error = -ENOMEM;
1072 goto err_free_mem;
1073 }
1074
1075 input_dev->name = "Atmel maXTouch Touchscreen";
1076 input_dev->id.bustype = BUS_I2C;
1077 input_dev->dev.parent = &client->dev;
1078 input_dev->open = mxt_input_open;
1079 input_dev->close = mxt_input_close;
1080
1081 data->client = client;
1082 data->input_dev = input_dev;
1083 data->pdata = pdata;
1084 data->irq = client->irq;
1085
1086 mxt_calc_resolution(data);
1087
1088 __set_bit(EV_ABS, input_dev->evbit);
1089 __set_bit(EV_KEY, input_dev->evbit);
1090 __set_bit(BTN_TOUCH, input_dev->keybit);
1091
1092 /* For single touch */
1093 input_set_abs_params(input_dev, ABS_X,
1094 0, data->max_x, 0, 0);
1095 input_set_abs_params(input_dev, ABS_Y,
1096 0, data->max_y, 0, 0);
1097
1098 /* For multi touch */
1099 input_mt_init_slots(input_dev, MXT_MAX_FINGER);
1100 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1101 0, MXT_MAX_AREA, 0, 0);
1102 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1103 0, data->max_x, 0, 0);
1104 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1105 0, data->max_y, 0, 0);
1106
1107 input_set_drvdata(input_dev, data);
1108 i2c_set_clientdata(client, data);
1109
1110 error = mxt_initialize(data);
1111 if (error)
1112 goto err_free_object;
1113
1114 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1115 pdata->irqflags, client->dev.driver->name, data);
1116 if (error) {
1117 dev_err(&client->dev, "Failed to register interrupt\n");
1118 goto err_free_object;
1119 }
1120
1121 error = mxt_make_highchg(data);
1122 if (error)
1123 goto err_free_irq;
1124
1125 error = input_register_device(input_dev);
1126 if (error)
1127 goto err_free_irq;
1128
1129 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1130 if (error)
1131 goto err_unregister_device;
1132
1133 return 0;
1134
1135 err_unregister_device:
1136 input_unregister_device(input_dev);
1137 input_dev = NULL;
1138 err_free_irq:
1139 free_irq(client->irq, data);
1140 err_free_object:
1141 kfree(data->object_table);
1142 err_free_mem:
1143 input_free_device(input_dev);
1144 kfree(data);
1145 return error;
1146 }
1147
1148 static int __devexit mxt_remove(struct i2c_client *client)
1149 {
1150 struct mxt_data *data = i2c_get_clientdata(client);
1151
1152 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1153 free_irq(data->irq, data);
1154 input_unregister_device(data->input_dev);
1155 kfree(data->object_table);
1156 kfree(data);
1157
1158 return 0;
1159 }
1160
1161 #ifdef CONFIG_PM
1162 static int mxt_suspend(struct device *dev)
1163 {
1164 struct i2c_client *client = to_i2c_client(dev);
1165 struct mxt_data *data = i2c_get_clientdata(client);
1166 struct input_dev *input_dev = data->input_dev;
1167
1168 mutex_lock(&input_dev->mutex);
1169
1170 if (input_dev->users)
1171 mxt_stop(data);
1172
1173 mutex_unlock(&input_dev->mutex);
1174
1175 return 0;
1176 }
1177
1178 static int mxt_resume(struct device *dev)
1179 {
1180 struct i2c_client *client = to_i2c_client(dev);
1181 struct mxt_data *data = i2c_get_clientdata(client);
1182 struct input_dev *input_dev = data->input_dev;
1183
1184 /* Soft reset */
1185 mxt_write_object(data, MXT_GEN_COMMAND,
1186 MXT_COMMAND_RESET, 1);
1187
1188 msleep(MXT_RESET_TIME);
1189
1190 mutex_lock(&input_dev->mutex);
1191
1192 if (input_dev->users)
1193 mxt_start(data);
1194
1195 mutex_unlock(&input_dev->mutex);
1196
1197 return 0;
1198 }
1199
1200 static const struct dev_pm_ops mxt_pm_ops = {
1201 .suspend = mxt_suspend,
1202 .resume = mxt_resume,
1203 };
1204 #endif
1205
1206 static const struct i2c_device_id mxt_id[] = {
1207 { "qt602240_ts", 0 },
1208 { "atmel_mxt_ts", 0 },
1209 { "mXT224", 0 },
1210 { }
1211 };
1212 MODULE_DEVICE_TABLE(i2c, mxt_id);
1213
1214 static struct i2c_driver mxt_driver = {
1215 .driver = {
1216 .name = "atmel_mxt_ts",
1217 .owner = THIS_MODULE,
1218 #ifdef CONFIG_PM
1219 .pm = &mxt_pm_ops,
1220 #endif
1221 },
1222 .probe = mxt_probe,
1223 .remove = __devexit_p(mxt_remove),
1224 .id_table = mxt_id,
1225 };
1226
1227 static int __init mxt_init(void)
1228 {
1229 return i2c_add_driver(&mxt_driver);
1230 }
1231
1232 static void __exit mxt_exit(void)
1233 {
1234 i2c_del_driver(&mxt_driver);
1235 }
1236
1237 module_init(mxt_init);
1238 module_exit(mxt_exit);
1239
1240 /* Module information */
1241 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1242 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1243 MODULE_LICENSE("GPL");
linux-next