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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
25#define MXT_VER_20 20
26#define MXT_VER_21 21
27#define MXT_VER_22 22
28
29
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
36#define MXT_FW_NAME "maxtouch.fw"
37
38
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
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
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
87#define MXT_POWER_IDLEACQINT 0
88#define MXT_POWER_ACTVACQINT 1
89#define MXT_POWER_ACTV2IDLETO 2
90
91
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
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
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
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
161#define MXT_COMMS_CTRL 0
162#define MXT_COMMS_CMD 1
163
164
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
176#define MXT_BOOT_VALUE 0xa5
177#define MXT_BACKUP_VALUE 0x55
178#define MXT_BACKUP_TIME 25
179#define MXT_RESET_TIME 65
180
181#define MXT_FWRESET_TIME 175
182
183
184#define MXT_UNLOCK_CMD_MSB 0xaa
185#define MXT_UNLOCK_CMD_LSB 0xdc
186
187
188#define MXT_WAITING_BOOTLOAD_CMD 0xc0
189#define MXT_WAITING_FRAME_DATA 0x80
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
194#define MXT_BOOT_STATUS_MASK 0x3f
195
196
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
206#define MXT_XY_SWITCH (1 << 0)
207#define MXT_X_INVERT (1 << 1)
208#define MXT_Y_INVERT (1 << 2)
209
210
211#define MXT_MAX_AREA 0xff
212
213#define MXT_MAX_FINGER 10
214
215struct 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
225struct mxt_object {
226 u8 type;
227 u16 start_address;
228 u8 size;
229 u8 instances;
230 u8 num_report_ids;
231
232
233 u8 max_reportid;
234};
235
236struct mxt_message {
237 u8 reportid;
238 u8 message[7];
239 u8 checksum;
240};
241
242struct mxt_finger {
243 int status;
244 int x;
245 int y;
246 int area;
247 int pressure;
248};
249
250
251struct 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
263static 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
297static 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
328static 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
342static int mxt_check_bootloader(struct i2c_client *client,
343 unsigned int state)
344{
345 u8 val;
346
347recheck:
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
374static 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
389static 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
400static 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
410 xfer[0].addr = client->addr;
411 xfer[0].flags = 0;
412 xfer[0].len = 2;
413 xfer[0].buf = buf;
414
415
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
429static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
430{
431 return __mxt_read_reg(client, reg, 1, val);
432}
433
434static 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
450static 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
457static struct mxt_object *
458mxt_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
473static 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
488static 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
502static 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
516static 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
559static 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
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
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
609static 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
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
643end:
644 return IRQ_HANDLED;
645}
646
647static 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
683static 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
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
705static void mxt_handle_pdata(struct mxt_data *data)
706{
707 const struct mxt_platform_data *pdata = data->pdata;
708 u8 voltage;
709
710
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
717 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
718 pdata->orient);
719
720
721 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
722 MXT_TOUCH_BLEN, pdata->blen);
723
724
725 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
726 MXT_TOUCH_TCHTHR, pdata->threshold);
727
728
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
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
753static 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
788static 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
820static 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
840 error = mxt_get_object_table(data);
841 if (error)
842 return error;
843
844
845 error = mxt_check_reg_init(data);
846 if (error)
847 return error;
848
849 mxt_handle_pdata(data);
850
851
852 mxt_write_object(data, MXT_GEN_COMMAND_T6,
853 MXT_COMMAND_BACKUPNV,
854 MXT_BACKUP_VALUE);
855 msleep(MXT_BACKUP_TIME);
856
857
858 mxt_write_object(data, MXT_GEN_COMMAND_T6,
859 MXT_COMMAND_RESET, 1);
860 msleep(MXT_RESET_TIME);
861
862
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
886static 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
900static 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 += sprintf(buf + count,
914 "Object Table Element %d(Type %d)\n",
915 i + 1, object->type);
916
917 if (!mxt_object_readable(object->type)) {
918 count += sprintf(buf + count, "\n");
919 continue;
920 }
921
922 for (j = 0; j < object->size + 1; j++) {
923 error = mxt_read_object(data,
924 object->type, j, &val);
925 if (error)
926 return error;
927
928 count += sprintf(buf + count,
929 " Byte %d: 0x%x (%d)\n", j, val, val);
930 }
931
932 count += sprintf(buf + count, "\n");
933 }
934
935 return count;
936}
937
938static int mxt_load_fw(struct device *dev, const char *fn)
939{
940 struct mxt_data *data = dev_get_drvdata(dev);
941 struct i2c_client *client = data->client;
942 const struct firmware *fw = NULL;
943 unsigned int frame_size;
944 unsigned int pos = 0;
945 int ret;
946
947 ret = request_firmware(&fw, fn, dev);
948 if (ret) {
949 dev_err(dev, "Unable to open firmware %s\n", fn);
950 return ret;
951 }
952
953
954 mxt_write_object(data, MXT_GEN_COMMAND_T6,
955 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
956 msleep(MXT_RESET_TIME);
957
958
959 if (client->addr == MXT_APP_LOW)
960 client->addr = MXT_BOOT_LOW;
961 else
962 client->addr = MXT_BOOT_HIGH;
963
964 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
965 if (ret)
966 goto out;
967
968
969 mxt_unlock_bootloader(client);
970
971 while (pos < fw->size) {
972 ret = mxt_check_bootloader(client,
973 MXT_WAITING_FRAME_DATA);
974 if (ret)
975 goto out;
976
977 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
978
979
980
981
982 frame_size += 2;
983
984
985 mxt_fw_write(client, fw->data + pos, frame_size);
986
987 ret = mxt_check_bootloader(client,
988 MXT_FRAME_CRC_PASS);
989 if (ret)
990 goto out;
991
992 pos += frame_size;
993
994 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
995 }
996
997out:
998 release_firmware(fw);
999
1000
1001 if (client->addr == MXT_BOOT_LOW)
1002 client->addr = MXT_APP_LOW;
1003 else
1004 client->addr = MXT_APP_HIGH;
1005
1006 return ret;
1007}
1008
1009static ssize_t mxt_update_fw_store(struct device *dev,
1010 struct device_attribute *attr,
1011 const char *buf, size_t count)
1012{
1013 struct mxt_data *data = dev_get_drvdata(dev);
1014 int error;
1015
1016 disable_irq(data->irq);
1017
1018 error = mxt_load_fw(dev, MXT_FW_NAME);
1019 if (error) {
1020 dev_err(dev, "The firmware update failed(%d)\n", error);
1021 count = error;
1022 } else {
1023 dev_dbg(dev, "The firmware update succeeded\n");
1024
1025
1026 msleep(MXT_FWRESET_TIME);
1027
1028 kfree(data->object_table);
1029 data->object_table = NULL;
1030
1031 mxt_initialize(data);
1032 }
1033
1034 enable_irq(data->irq);
1035
1036 error = mxt_make_highchg(data);
1037 if (error)
1038 return error;
1039
1040 return count;
1041}
1042
1043static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
1044static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
1045
1046static struct attribute *mxt_attrs[] = {
1047 &dev_attr_object.attr,
1048 &dev_attr_update_fw.attr,
1049 NULL
1050};
1051
1052static const struct attribute_group mxt_attr_group = {
1053 .attrs = mxt_attrs,
1054};
1055
1056static void mxt_start(struct mxt_data *data)
1057{
1058
1059 mxt_write_object(data,
1060 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1061}
1062
1063static void mxt_stop(struct mxt_data *data)
1064{
1065
1066 mxt_write_object(data,
1067 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1068}
1069
1070static int mxt_input_open(struct input_dev *dev)
1071{
1072 struct mxt_data *data = input_get_drvdata(dev);
1073
1074 mxt_start(data);
1075
1076 return 0;
1077}
1078
1079static void mxt_input_close(struct input_dev *dev)
1080{
1081 struct mxt_data *data = input_get_drvdata(dev);
1082
1083 mxt_stop(data);
1084}
1085
1086static int __devinit mxt_probe(struct i2c_client *client,
1087 const struct i2c_device_id *id)
1088{
1089 const struct mxt_platform_data *pdata = client->dev.platform_data;
1090 struct mxt_data *data;
1091 struct input_dev *input_dev;
1092 int error;
1093
1094 if (!pdata)
1095 return -EINVAL;
1096
1097 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1098 input_dev = input_allocate_device();
1099 if (!data || !input_dev) {
1100 dev_err(&client->dev, "Failed to allocate memory\n");
1101 error = -ENOMEM;
1102 goto err_free_mem;
1103 }
1104
1105 input_dev->name = "Atmel maXTouch Touchscreen";
1106 input_dev->id.bustype = BUS_I2C;
1107 input_dev->dev.parent = &client->dev;
1108 input_dev->open = mxt_input_open;
1109 input_dev->close = mxt_input_close;
1110
1111 data->client = client;
1112 data->input_dev = input_dev;
1113 data->pdata = pdata;
1114 data->irq = client->irq;
1115
1116 mxt_calc_resolution(data);
1117
1118 __set_bit(EV_ABS, input_dev->evbit);
1119 __set_bit(EV_KEY, input_dev->evbit);
1120 __set_bit(BTN_TOUCH, input_dev->keybit);
1121
1122
1123 input_set_abs_params(input_dev, ABS_X,
1124 0, data->max_x, 0, 0);
1125 input_set_abs_params(input_dev, ABS_Y,
1126 0, data->max_y, 0, 0);
1127 input_set_abs_params(input_dev, ABS_PRESSURE,
1128 0, 255, 0, 0);
1129
1130
1131 input_mt_init_slots(input_dev, MXT_MAX_FINGER);
1132 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1133 0, MXT_MAX_AREA, 0, 0);
1134 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1135 0, data->max_x, 0, 0);
1136 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1137 0, data->max_y, 0, 0);
1138 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1139 0, 255, 0, 0);
1140
1141 input_set_drvdata(input_dev, data);
1142 i2c_set_clientdata(client, data);
1143
1144 error = mxt_initialize(data);
1145 if (error)
1146 goto err_free_object;
1147
1148 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1149 pdata->irqflags, client->dev.driver->name, data);
1150 if (error) {
1151 dev_err(&client->dev, "Failed to register interrupt\n");
1152 goto err_free_object;
1153 }
1154
1155 error = mxt_make_highchg(data);
1156 if (error)
1157 goto err_free_irq;
1158
1159 error = input_register_device(input_dev);
1160 if (error)
1161 goto err_free_irq;
1162
1163 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1164 if (error)
1165 goto err_unregister_device;
1166
1167 return 0;
1168
1169err_unregister_device:
1170 input_unregister_device(input_dev);
1171 input_dev = NULL;
1172err_free_irq:
1173 free_irq(client->irq, data);
1174err_free_object:
1175 kfree(data->object_table);
1176err_free_mem:
1177 input_free_device(input_dev);
1178 kfree(data);
1179 return error;
1180}
1181
1182static int __devexit mxt_remove(struct i2c_client *client)
1183{
1184 struct mxt_data *data = i2c_get_clientdata(client);
1185
1186 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1187 free_irq(data->irq, data);
1188 input_unregister_device(data->input_dev);
1189 kfree(data->object_table);
1190 kfree(data);
1191
1192 return 0;
1193}
1194
1195#ifdef CONFIG_PM
1196static int mxt_suspend(struct device *dev)
1197{
1198 struct i2c_client *client = to_i2c_client(dev);
1199 struct mxt_data *data = i2c_get_clientdata(client);
1200 struct input_dev *input_dev = data->input_dev;
1201
1202 mutex_lock(&input_dev->mutex);
1203
1204 if (input_dev->users)
1205 mxt_stop(data);
1206
1207 mutex_unlock(&input_dev->mutex);
1208
1209 return 0;
1210}
1211
1212static int mxt_resume(struct device *dev)
1213{
1214 struct i2c_client *client = to_i2c_client(dev);
1215 struct mxt_data *data = i2c_get_clientdata(client);
1216 struct input_dev *input_dev = data->input_dev;
1217
1218
1219 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1220 MXT_COMMAND_RESET, 1);
1221
1222 msleep(MXT_RESET_TIME);
1223
1224 mutex_lock(&input_dev->mutex);
1225
1226 if (input_dev->users)
1227 mxt_start(data);
1228
1229 mutex_unlock(&input_dev->mutex);
1230
1231 return 0;
1232}
1233
1234static const struct dev_pm_ops mxt_pm_ops = {
1235 .suspend = mxt_suspend,
1236 .resume = mxt_resume,
1237};
1238#endif
1239
1240static const struct i2c_device_id mxt_id[] = {
1241 { "qt602240_ts", 0 },
1242 { "atmel_mxt_ts", 0 },
1243 { "mXT224", 0 },
1244 { }
1245};
1246MODULE_DEVICE_TABLE(i2c, mxt_id);
1247
1248static struct i2c_driver mxt_driver = {
1249 .driver = {
1250 .name = "atmel_mxt_ts",
1251 .owner = THIS_MODULE,
1252#ifdef CONFIG_PM
1253 .pm = &mxt_pm_ops,
1254#endif
1255 },
1256 .probe = mxt_probe,
1257 .remove = __devexit_p(mxt_remove),
1258 .id_table = mxt_id,
1259};
1260
1261static int __init mxt_init(void)
1262{
1263 return i2c_add_driver(&mxt_driver);
1264}
1265
1266static void __exit mxt_exit(void)
1267{
1268 i2c_del_driver(&mxt_driver);
1269}
1270
1271module_init(mxt_init);
1272module_exit(mxt_exit);
1273
1274
1275MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1276MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1277MODULE_LICENSE("GPL");
1278
