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Merge branch 'upstream' into for-linus
[deliverable/linux.git] / drivers / input / touchscreen / atmel_mxt_ts.c
1 /*
2 * Atmel maXTouch Touchscreen driver
3 *
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * 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 u8 checksum;
240 };
241
242 struct mxt_finger {
243 int status;
244 int x;
245 int y;
246 int area;
247 int pressure;
248 };
249
250 /* Each client has this additional data */
251 struct mxt_data {
252 struct i2c_client *client;
253 struct input_dev *input_dev;
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_MESSAGE_T5:
267 case MXT_GEN_COMMAND_T6:
268 case MXT_GEN_POWER_T7:
269 case MXT_GEN_ACQUIRE_T8:
270 case MXT_GEN_DATASOURCE_T53:
271 case MXT_TOUCH_MULTI_T9:
272 case MXT_TOUCH_KEYARRAY_T15:
273 case MXT_TOUCH_PROXIMITY_T23:
274 case MXT_TOUCH_PROXKEY_T52:
275 case MXT_PROCI_GRIPFACE_T20:
276 case MXT_PROCG_NOISE_T22:
277 case MXT_PROCI_ONETOUCH_T24:
278 case MXT_PROCI_TWOTOUCH_T27:
279 case MXT_PROCI_GRIP_T40:
280 case MXT_PROCI_PALM_T41:
281 case MXT_PROCI_TOUCHSUPPRESSION_T42:
282 case MXT_PROCI_STYLUS_T47:
283 case MXT_PROCG_NOISESUPPRESSION_T48:
284 case MXT_SPT_COMMSCONFIG_T18:
285 case MXT_SPT_GPIOPWM_T19:
286 case MXT_SPT_SELFTEST_T25:
287 case MXT_SPT_CTECONFIG_T28:
288 case MXT_SPT_USERDATA_T38:
289 case MXT_SPT_DIGITIZER_T43:
290 case MXT_SPT_CTECONFIG_T46:
291 return true;
292 default:
293 return false;
294 }
295 }
296
297 static bool mxt_object_writable(unsigned int type)
298 {
299 switch (type) {
300 case MXT_GEN_COMMAND_T6:
301 case MXT_GEN_POWER_T7:
302 case MXT_GEN_ACQUIRE_T8:
303 case MXT_TOUCH_MULTI_T9:
304 case MXT_TOUCH_KEYARRAY_T15:
305 case MXT_TOUCH_PROXIMITY_T23:
306 case MXT_TOUCH_PROXKEY_T52:
307 case MXT_PROCI_GRIPFACE_T20:
308 case MXT_PROCG_NOISE_T22:
309 case MXT_PROCI_ONETOUCH_T24:
310 case MXT_PROCI_TWOTOUCH_T27:
311 case MXT_PROCI_GRIP_T40:
312 case MXT_PROCI_PALM_T41:
313 case MXT_PROCI_TOUCHSUPPRESSION_T42:
314 case MXT_PROCI_STYLUS_T47:
315 case MXT_PROCG_NOISESUPPRESSION_T48:
316 case MXT_SPT_COMMSCONFIG_T18:
317 case MXT_SPT_GPIOPWM_T19:
318 case MXT_SPT_SELFTEST_T25:
319 case MXT_SPT_CTECONFIG_T28:
320 case MXT_SPT_DIGITIZER_T43:
321 case MXT_SPT_CTECONFIG_T46:
322 return true;
323 default:
324 return false;
325 }
326 }
327
328 static void mxt_dump_message(struct device *dev,
329 struct mxt_message *message)
330 {
331 dev_dbg(dev, "reportid:\t0x%x\n", message->reportid);
332 dev_dbg(dev, "message1:\t0x%x\n", message->message[0]);
333 dev_dbg(dev, "message2:\t0x%x\n", message->message[1]);
334 dev_dbg(dev, "message3:\t0x%x\n", message->message[2]);
335 dev_dbg(dev, "message4:\t0x%x\n", message->message[3]);
336 dev_dbg(dev, "message5:\t0x%x\n", message->message[4]);
337 dev_dbg(dev, "message6:\t0x%x\n", message->message[5]);
338 dev_dbg(dev, "message7:\t0x%x\n", message->message[6]);
339 dev_dbg(dev, "checksum:\t0x%x\n", message->checksum);
340 }
341
342 static int mxt_check_bootloader(struct i2c_client *client,
343 unsigned int state)
344 {
345 u8 val;
346
347 recheck:
348 if (i2c_master_recv(client, &val, 1) != 1) {
349 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
350 return -EIO;
351 }
352
353 switch (state) {
354 case MXT_WAITING_BOOTLOAD_CMD:
355 case MXT_WAITING_FRAME_DATA:
356 val &= ~MXT_BOOT_STATUS_MASK;
357 break;
358 case MXT_FRAME_CRC_PASS:
359 if (val == MXT_FRAME_CRC_CHECK)
360 goto recheck;
361 break;
362 default:
363 return -EINVAL;
364 }
365
366 if (val != state) {
367 dev_err(&client->dev, "Unvalid bootloader mode state\n");
368 return -EINVAL;
369 }
370
371 return 0;
372 }
373
374 static int mxt_unlock_bootloader(struct i2c_client *client)
375 {
376 u8 buf[2];
377
378 buf[0] = MXT_UNLOCK_CMD_LSB;
379 buf[1] = MXT_UNLOCK_CMD_MSB;
380
381 if (i2c_master_send(client, buf, 2) != 2) {
382 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
383 return -EIO;
384 }
385
386 return 0;
387 }
388
389 static int mxt_fw_write(struct i2c_client *client,
390 const u8 *data, unsigned int frame_size)
391 {
392 if (i2c_master_send(client, data, frame_size) != frame_size) {
393 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
394 return -EIO;
395 }
396
397 return 0;
398 }
399
400 static int __mxt_read_reg(struct i2c_client *client,
401 u16 reg, u16 len, void *val)
402 {
403 struct i2c_msg xfer[2];
404 u8 buf[2];
405
406 buf[0] = reg & 0xff;
407 buf[1] = (reg >> 8) & 0xff;
408
409 /* Write register */
410 xfer[0].addr = client->addr;
411 xfer[0].flags = 0;
412 xfer[0].len = 2;
413 xfer[0].buf = buf;
414
415 /* Read data */
416 xfer[1].addr = client->addr;
417 xfer[1].flags = I2C_M_RD;
418 xfer[1].len = len;
419 xfer[1].buf = val;
420
421 if (i2c_transfer(client->adapter, xfer, 2) != 2) {
422 dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
423 return -EIO;
424 }
425
426 return 0;
427 }
428
429 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
430 {
431 return __mxt_read_reg(client, reg, 1, val);
432 }
433
434 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
435 {
436 u8 buf[3];
437
438 buf[0] = reg & 0xff;
439 buf[1] = (reg >> 8) & 0xff;
440 buf[2] = val;
441
442 if (i2c_master_send(client, buf, 3) != 3) {
443 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
444 return -EIO;
445 }
446
447 return 0;
448 }
449
450 static int mxt_read_object_table(struct i2c_client *client,
451 u16 reg, u8 *object_buf)
452 {
453 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
454 object_buf);
455 }
456
457 static struct mxt_object *
458 mxt_get_object(struct mxt_data *data, u8 type)
459 {
460 struct mxt_object *object;
461 int i;
462
463 for (i = 0; i < data->info.object_num; i++) {
464 object = data->object_table + i;
465 if (object->type == type)
466 return object;
467 }
468
469 dev_err(&data->client->dev, "Invalid object type\n");
470 return NULL;
471 }
472
473 static int mxt_read_message(struct mxt_data *data,
474 struct mxt_message *message)
475 {
476 struct mxt_object *object;
477 u16 reg;
478
479 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
480 if (!object)
481 return -EINVAL;
482
483 reg = object->start_address;
484 return __mxt_read_reg(data->client, reg,
485 sizeof(struct mxt_message), message);
486 }
487
488 static int mxt_read_object(struct mxt_data *data,
489 u8 type, u8 offset, u8 *val)
490 {
491 struct mxt_object *object;
492 u16 reg;
493
494 object = mxt_get_object(data, type);
495 if (!object)
496 return -EINVAL;
497
498 reg = object->start_address;
499 return __mxt_read_reg(data->client, reg + offset, 1, val);
500 }
501
502 static int mxt_write_object(struct mxt_data *data,
503 u8 type, u8 offset, u8 val)
504 {
505 struct mxt_object *object;
506 u16 reg;
507
508 object = mxt_get_object(data, type);
509 if (!object)
510 return -EINVAL;
511
512 reg = object->start_address;
513 return mxt_write_reg(data->client, reg + offset, val);
514 }
515
516 static void mxt_input_report(struct mxt_data *data, int single_id)
517 {
518 struct mxt_finger *finger = data->finger;
519 struct input_dev *input_dev = data->input_dev;
520 int status = finger[single_id].status;
521 int finger_num = 0;
522 int id;
523
524 for (id = 0; id < MXT_MAX_FINGER; id++) {
525 if (!finger[id].status)
526 continue;
527
528 input_mt_slot(input_dev, id);
529 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
530 finger[id].status != MXT_RELEASE);
531
532 if (finger[id].status != MXT_RELEASE) {
533 finger_num++;
534 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
535 finger[id].area);
536 input_report_abs(input_dev, ABS_MT_POSITION_X,
537 finger[id].x);
538 input_report_abs(input_dev, ABS_MT_POSITION_Y,
539 finger[id].y);
540 input_report_abs(input_dev, ABS_MT_PRESSURE,
541 finger[id].pressure);
542 } else {
543 finger[id].status = 0;
544 }
545 }
546
547 input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
548
549 if (status != MXT_RELEASE) {
550 input_report_abs(input_dev, ABS_X, finger[single_id].x);
551 input_report_abs(input_dev, ABS_Y, finger[single_id].y);
552 input_report_abs(input_dev,
553 ABS_PRESSURE, finger[single_id].pressure);
554 }
555
556 input_sync(input_dev);
557 }
558
559 static void mxt_input_touchevent(struct mxt_data *data,
560 struct mxt_message *message, int id)
561 {
562 struct mxt_finger *finger = data->finger;
563 struct device *dev = &data->client->dev;
564 u8 status = message->message[0];
565 int x;
566 int y;
567 int area;
568 int pressure;
569
570 /* Check the touch is present on the screen */
571 if (!(status & MXT_DETECT)) {
572 if (status & MXT_RELEASE) {
573 dev_dbg(dev, "[%d] released\n", id);
574
575 finger[id].status = MXT_RELEASE;
576 mxt_input_report(data, id);
577 }
578 return;
579 }
580
581 /* Check only AMP detection */
582 if (!(status & (MXT_PRESS | MXT_MOVE)))
583 return;
584
585 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
586 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
587 if (data->max_x < 1024)
588 x = x >> 2;
589 if (data->max_y < 1024)
590 y = y >> 2;
591
592 area = message->message[4];
593 pressure = message->message[5];
594
595 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
596 status & MXT_MOVE ? "moved" : "pressed",
597 x, y, area);
598
599 finger[id].status = status & MXT_MOVE ?
600 MXT_MOVE : MXT_PRESS;
601 finger[id].x = x;
602 finger[id].y = y;
603 finger[id].area = area;
604 finger[id].pressure = pressure;
605
606 mxt_input_report(data, id);
607 }
608
609 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
610 {
611 struct mxt_data *data = dev_id;
612 struct mxt_message message;
613 struct mxt_object *object;
614 struct device *dev = &data->client->dev;
615 int id;
616 u8 reportid;
617 u8 max_reportid;
618 u8 min_reportid;
619
620 do {
621 if (mxt_read_message(data, &message)) {
622 dev_err(dev, "Failed to read message\n");
623 goto end;
624 }
625
626 reportid = message.reportid;
627
628 /* whether reportid is thing of MXT_TOUCH_MULTI_T9 */
629 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
630 if (!object)
631 goto end;
632
633 max_reportid = object->max_reportid;
634 min_reportid = max_reportid - object->num_report_ids + 1;
635 id = reportid - min_reportid;
636
637 if (reportid >= min_reportid && reportid <= max_reportid)
638 mxt_input_touchevent(data, &message, id);
639 else
640 mxt_dump_message(dev, &message);
641 } while (reportid != 0xff);
642
643 end:
644 return IRQ_HANDLED;
645 }
646
647 static int mxt_check_reg_init(struct mxt_data *data)
648 {
649 const struct mxt_platform_data *pdata = data->pdata;
650 struct mxt_object *object;
651 struct device *dev = &data->client->dev;
652 int index = 0;
653 int i, j, config_offset;
654
655 if (!pdata->config) {
656 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
657 return 0;
658 }
659
660 for (i = 0; i < data->info.object_num; i++) {
661 object = data->object_table + i;
662
663 if (!mxt_object_writable(object->type))
664 continue;
665
666 for (j = 0;
667 j < (object->size + 1) * (object->instances + 1);
668 j++) {
669 config_offset = index + j;
670 if (config_offset > pdata->config_length) {
671 dev_err(dev, "Not enough config data!\n");
672 return -EINVAL;
673 }
674 mxt_write_object(data, object->type, j,
675 pdata->config[config_offset]);
676 }
677 index += (object->size + 1) * (object->instances + 1);
678 }
679
680 return 0;
681 }
682
683 static int mxt_make_highchg(struct mxt_data *data)
684 {
685 struct device *dev = &data->client->dev;
686 struct mxt_message message;
687 int count = 10;
688 int error;
689
690 /* Read dummy message to make high CHG pin */
691 do {
692 error = mxt_read_message(data, &message);
693 if (error)
694 return error;
695 } while (message.reportid != 0xff && --count);
696
697 if (!count) {
698 dev_err(dev, "CHG pin isn't cleared\n");
699 return -EBUSY;
700 }
701
702 return 0;
703 }
704
705 static void mxt_handle_pdata(struct mxt_data *data)
706 {
707 const struct mxt_platform_data *pdata = data->pdata;
708 u8 voltage;
709
710 /* Set touchscreen lines */
711 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
712 pdata->x_line);
713 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
714 pdata->y_line);
715
716 /* Set touchscreen orient */
717 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
718 pdata->orient);
719
720 /* Set touchscreen burst length */
721 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
722 MXT_TOUCH_BLEN, pdata->blen);
723
724 /* Set touchscreen threshold */
725 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
726 MXT_TOUCH_TCHTHR, pdata->threshold);
727
728 /* Set touchscreen resolution */
729 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
730 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
731 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
732 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
733 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
734 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
735 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
736 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
737
738 /* Set touchscreen voltage */
739 if (pdata->voltage) {
740 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
741 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
742 MXT_VOLTAGE_STEP;
743 voltage = 0xff - voltage + 1;
744 } else
745 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
746 MXT_VOLTAGE_STEP;
747
748 mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
749 MXT_CTE_VOLTAGE, voltage);
750 }
751 }
752
753 static int mxt_get_info(struct mxt_data *data)
754 {
755 struct i2c_client *client = data->client;
756 struct mxt_info *info = &data->info;
757 int error;
758 u8 val;
759
760 error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
761 if (error)
762 return error;
763 info->family_id = val;
764
765 error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
766 if (error)
767 return error;
768 info->variant_id = val;
769
770 error = mxt_read_reg(client, MXT_VERSION, &val);
771 if (error)
772 return error;
773 info->version = val;
774
775 error = mxt_read_reg(client, MXT_BUILD, &val);
776 if (error)
777 return error;
778 info->build = val;
779
780 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
781 if (error)
782 return error;
783 info->object_num = val;
784
785 return 0;
786 }
787
788 static int mxt_get_object_table(struct mxt_data *data)
789 {
790 int error;
791 int i;
792 u16 reg;
793 u8 reportid = 0;
794 u8 buf[MXT_OBJECT_SIZE];
795
796 for (i = 0; i < data->info.object_num; i++) {
797 struct mxt_object *object = data->object_table + i;
798
799 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
800 error = mxt_read_object_table(data->client, reg, buf);
801 if (error)
802 return error;
803
804 object->type = buf[0];
805 object->start_address = (buf[2] << 8) | buf[1];
806 object->size = buf[3];
807 object->instances = buf[4];
808 object->num_report_ids = buf[5];
809
810 if (object->num_report_ids) {
811 reportid += object->num_report_ids *
812 (object->instances + 1);
813 object->max_reportid = reportid;
814 }
815 }
816
817 return 0;
818 }
819
820 static int mxt_initialize(struct mxt_data *data)
821 {
822 struct i2c_client *client = data->client;
823 struct mxt_info *info = &data->info;
824 int error;
825 u8 val;
826
827 error = mxt_get_info(data);
828 if (error)
829 return error;
830
831 data->object_table = kcalloc(info->object_num,
832 sizeof(struct mxt_object),
833 GFP_KERNEL);
834 if (!data->object_table) {
835 dev_err(&client->dev, "Failed to allocate memory\n");
836 return -ENOMEM;
837 }
838
839 /* Get object table information */
840 error = mxt_get_object_table(data);
841 if (error)
842 return error;
843
844 /* Check register init values */
845 error = mxt_check_reg_init(data);
846 if (error)
847 return error;
848
849 mxt_handle_pdata(data);
850
851 /* Backup to memory */
852 mxt_write_object(data, MXT_GEN_COMMAND_T6,
853 MXT_COMMAND_BACKUPNV,
854 MXT_BACKUP_VALUE);
855 msleep(MXT_BACKUP_TIME);
856
857 /* Soft reset */
858 mxt_write_object(data, MXT_GEN_COMMAND_T6,
859 MXT_COMMAND_RESET, 1);
860 msleep(MXT_RESET_TIME);
861
862 /* Update matrix size at info struct */
863 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
864 if (error)
865 return error;
866 info->matrix_xsize = val;
867
868 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
869 if (error)
870 return error;
871 info->matrix_ysize = val;
872
873 dev_info(&client->dev,
874 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
875 info->family_id, info->variant_id, info->version,
876 info->build);
877
878 dev_info(&client->dev,
879 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
880 info->matrix_xsize, info->matrix_ysize,
881 info->object_num);
882
883 return 0;
884 }
885
886 static void mxt_calc_resolution(struct mxt_data *data)
887 {
888 unsigned int max_x = data->pdata->x_size - 1;
889 unsigned int max_y = data->pdata->y_size - 1;
890
891 if (data->pdata->orient & MXT_XY_SWITCH) {
892 data->max_x = max_y;
893 data->max_y = max_x;
894 } else {
895 data->max_x = max_x;
896 data->max_y = max_y;
897 }
898 }
899
900 static ssize_t mxt_object_show(struct device *dev,
901 struct device_attribute *attr, char *buf)
902 {
903 struct mxt_data *data = dev_get_drvdata(dev);
904 struct mxt_object *object;
905 int count = 0;
906 int i, j;
907 int error;
908 u8 val;
909
910 for (i = 0; i < data->info.object_num; i++) {
911 object = data->object_table + i;
912
913 count += snprintf(buf + count, PAGE_SIZE - count,
914 "Object[%d] (Type %d)\n",
915 i + 1, object->type);
916 if (count >= PAGE_SIZE)
917 return PAGE_SIZE - 1;
918
919 if (!mxt_object_readable(object->type)) {
920 count += snprintf(buf + count, PAGE_SIZE - count,
921 "\n");
922 if (count >= PAGE_SIZE)
923 return PAGE_SIZE - 1;
924 continue;
925 }
926
927 for (j = 0; j < object->size + 1; j++) {
928 error = mxt_read_object(data,
929 object->type, j, &val);
930 if (error)
931 return error;
932
933 count += snprintf(buf + count, PAGE_SIZE - count,
934 "\t[%2d]: %02x (%d)\n", j, val, val);
935 if (count >= PAGE_SIZE)
936 return PAGE_SIZE - 1;
937 }
938
939 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
940 if (count >= PAGE_SIZE)
941 return PAGE_SIZE - 1;
942 }
943
944 return count;
945 }
946
947 static int mxt_load_fw(struct device *dev, const char *fn)
948 {
949 struct mxt_data *data = dev_get_drvdata(dev);
950 struct i2c_client *client = data->client;
951 const struct firmware *fw = NULL;
952 unsigned int frame_size;
953 unsigned int pos = 0;
954 int ret;
955
956 ret = request_firmware(&fw, fn, dev);
957 if (ret) {
958 dev_err(dev, "Unable to open firmware %s\n", fn);
959 return ret;
960 }
961
962 /* Change to the bootloader mode */
963 mxt_write_object(data, MXT_GEN_COMMAND_T6,
964 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
965 msleep(MXT_RESET_TIME);
966
967 /* Change to slave address of bootloader */
968 if (client->addr == MXT_APP_LOW)
969 client->addr = MXT_BOOT_LOW;
970 else
971 client->addr = MXT_BOOT_HIGH;
972
973 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
974 if (ret)
975 goto out;
976
977 /* Unlock bootloader */
978 mxt_unlock_bootloader(client);
979
980 while (pos < fw->size) {
981 ret = mxt_check_bootloader(client,
982 MXT_WAITING_FRAME_DATA);
983 if (ret)
984 goto out;
985
986 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
987
988 /* We should add 2 at frame size as the the firmware data is not
989 * included the CRC bytes.
990 */
991 frame_size += 2;
992
993 /* Write one frame to device */
994 mxt_fw_write(client, fw->data + pos, frame_size);
995
996 ret = mxt_check_bootloader(client,
997 MXT_FRAME_CRC_PASS);
998 if (ret)
999 goto out;
1000
1001 pos += frame_size;
1002
1003 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
1004 }
1005
1006 out:
1007 release_firmware(fw);
1008
1009 /* Change to slave address of application */
1010 if (client->addr == MXT_BOOT_LOW)
1011 client->addr = MXT_APP_LOW;
1012 else
1013 client->addr = MXT_APP_HIGH;
1014
1015 return ret;
1016 }
1017
1018 static ssize_t mxt_update_fw_store(struct device *dev,
1019 struct device_attribute *attr,
1020 const char *buf, size_t count)
1021 {
1022 struct mxt_data *data = dev_get_drvdata(dev);
1023 int error;
1024
1025 disable_irq(data->irq);
1026
1027 error = mxt_load_fw(dev, MXT_FW_NAME);
1028 if (error) {
1029 dev_err(dev, "The firmware update failed(%d)\n", error);
1030 count = error;
1031 } else {
1032 dev_dbg(dev, "The firmware update succeeded\n");
1033
1034 /* Wait for reset */
1035 msleep(MXT_FWRESET_TIME);
1036
1037 kfree(data->object_table);
1038 data->object_table = NULL;
1039
1040 mxt_initialize(data);
1041 }
1042
1043 enable_irq(data->irq);
1044
1045 error = mxt_make_highchg(data);
1046 if (error)
1047 return error;
1048
1049 return count;
1050 }
1051
1052 static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
1053 static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
1054
1055 static struct attribute *mxt_attrs[] = {
1056 &dev_attr_object.attr,
1057 &dev_attr_update_fw.attr,
1058 NULL
1059 };
1060
1061 static const struct attribute_group mxt_attr_group = {
1062 .attrs = mxt_attrs,
1063 };
1064
1065 static void mxt_start(struct mxt_data *data)
1066 {
1067 /* Touch enable */
1068 mxt_write_object(data,
1069 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1070 }
1071
1072 static void mxt_stop(struct mxt_data *data)
1073 {
1074 /* Touch disable */
1075 mxt_write_object(data,
1076 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1077 }
1078
1079 static int mxt_input_open(struct input_dev *dev)
1080 {
1081 struct mxt_data *data = input_get_drvdata(dev);
1082
1083 mxt_start(data);
1084
1085 return 0;
1086 }
1087
1088 static void mxt_input_close(struct input_dev *dev)
1089 {
1090 struct mxt_data *data = input_get_drvdata(dev);
1091
1092 mxt_stop(data);
1093 }
1094
1095 static int __devinit mxt_probe(struct i2c_client *client,
1096 const struct i2c_device_id *id)
1097 {
1098 const struct mxt_platform_data *pdata = client->dev.platform_data;
1099 struct mxt_data *data;
1100 struct input_dev *input_dev;
1101 int error;
1102
1103 if (!pdata)
1104 return -EINVAL;
1105
1106 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1107 input_dev = input_allocate_device();
1108 if (!data || !input_dev) {
1109 dev_err(&client->dev, "Failed to allocate memory\n");
1110 error = -ENOMEM;
1111 goto err_free_mem;
1112 }
1113
1114 input_dev->name = "Atmel maXTouch Touchscreen";
1115 input_dev->id.bustype = BUS_I2C;
1116 input_dev->dev.parent = &client->dev;
1117 input_dev->open = mxt_input_open;
1118 input_dev->close = mxt_input_close;
1119
1120 data->client = client;
1121 data->input_dev = input_dev;
1122 data->pdata = pdata;
1123 data->irq = client->irq;
1124
1125 mxt_calc_resolution(data);
1126
1127 __set_bit(EV_ABS, input_dev->evbit);
1128 __set_bit(EV_KEY, input_dev->evbit);
1129 __set_bit(BTN_TOUCH, input_dev->keybit);
1130
1131 /* For single touch */
1132 input_set_abs_params(input_dev, ABS_X,
1133 0, data->max_x, 0, 0);
1134 input_set_abs_params(input_dev, ABS_Y,
1135 0, data->max_y, 0, 0);
1136 input_set_abs_params(input_dev, ABS_PRESSURE,
1137 0, 255, 0, 0);
1138
1139 /* For multi touch */
1140 input_mt_init_slots(input_dev, MXT_MAX_FINGER);
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->dev.driver->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 goto err_unregister_device;
1175
1176 return 0;
1177
1178 err_unregister_device:
1179 input_unregister_device(input_dev);
1180 input_dev = NULL;
1181 err_free_irq:
1182 free_irq(client->irq, data);
1183 err_free_object:
1184 kfree(data->object_table);
1185 err_free_mem:
1186 input_free_device(input_dev);
1187 kfree(data);
1188 return error;
1189 }
1190
1191 static int __devexit mxt_remove(struct i2c_client *client)
1192 {
1193 struct mxt_data *data = i2c_get_clientdata(client);
1194
1195 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1196 free_irq(data->irq, data);
1197 input_unregister_device(data->input_dev);
1198 kfree(data->object_table);
1199 kfree(data);
1200
1201 return 0;
1202 }
1203
1204 #ifdef CONFIG_PM
1205 static int mxt_suspend(struct device *dev)
1206 {
1207 struct i2c_client *client = to_i2c_client(dev);
1208 struct mxt_data *data = i2c_get_clientdata(client);
1209 struct input_dev *input_dev = data->input_dev;
1210
1211 mutex_lock(&input_dev->mutex);
1212
1213 if (input_dev->users)
1214 mxt_stop(data);
1215
1216 mutex_unlock(&input_dev->mutex);
1217
1218 return 0;
1219 }
1220
1221 static int mxt_resume(struct device *dev)
1222 {
1223 struct i2c_client *client = to_i2c_client(dev);
1224 struct mxt_data *data = i2c_get_clientdata(client);
1225 struct input_dev *input_dev = data->input_dev;
1226
1227 /* Soft reset */
1228 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1229 MXT_COMMAND_RESET, 1);
1230
1231 msleep(MXT_RESET_TIME);
1232
1233 mutex_lock(&input_dev->mutex);
1234
1235 if (input_dev->users)
1236 mxt_start(data);
1237
1238 mutex_unlock(&input_dev->mutex);
1239
1240 return 0;
1241 }
1242
1243 static const struct dev_pm_ops mxt_pm_ops = {
1244 .suspend = mxt_suspend,
1245 .resume = mxt_resume,
1246 };
1247 #endif
1248
1249 static const struct i2c_device_id mxt_id[] = {
1250 { "qt602240_ts", 0 },
1251 { "atmel_mxt_ts", 0 },
1252 { "mXT224", 0 },
1253 { }
1254 };
1255 MODULE_DEVICE_TABLE(i2c, mxt_id);
1256
1257 static struct i2c_driver mxt_driver = {
1258 .driver = {
1259 .name = "atmel_mxt_ts",
1260 .owner = THIS_MODULE,
1261 #ifdef CONFIG_PM
1262 .pm = &mxt_pm_ops,
1263 #endif
1264 },
1265 .probe = mxt_probe,
1266 .remove = __devexit_p(mxt_remove),
1267 .id_table = mxt_id,
1268 };
1269
1270 module_i2c_driver(mxt_driver);
1271
1272 /* Module information */
1273 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1274 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1275 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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