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Merge branch 'next/drivers' into HEAD
[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_INFO 0x00
40 #define MXT_FAMILY_ID 0x00
41 #define MXT_VARIANT_ID 0x01
42 #define MXT_VERSION 0x02
43 #define MXT_BUILD 0x03
44 #define MXT_MATRIX_X_SIZE 0x04
45 #define MXT_MATRIX_Y_SIZE 0x05
46 #define MXT_OBJECT_NUM 0x06
47 #define MXT_OBJECT_START 0x07
48
49 #define MXT_OBJECT_SIZE 6
50
51 /* Object types */
52 #define MXT_DEBUG_DIAGNOSTIC_T37 37
53 #define MXT_GEN_MESSAGE_T5 5
54 #define MXT_GEN_COMMAND_T6 6
55 #define MXT_GEN_POWER_T7 7
56 #define MXT_GEN_ACQUIRE_T8 8
57 #define MXT_GEN_DATASOURCE_T53 53
58 #define MXT_TOUCH_MULTI_T9 9
59 #define MXT_TOUCH_KEYARRAY_T15 15
60 #define MXT_TOUCH_PROXIMITY_T23 23
61 #define MXT_TOUCH_PROXKEY_T52 52
62 #define MXT_PROCI_GRIPFACE_T20 20
63 #define MXT_PROCG_NOISE_T22 22
64 #define MXT_PROCI_ONETOUCH_T24 24
65 #define MXT_PROCI_TWOTOUCH_T27 27
66 #define MXT_PROCI_GRIP_T40 40
67 #define MXT_PROCI_PALM_T41 41
68 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
69 #define MXT_PROCI_STYLUS_T47 47
70 #define MXT_PROCG_NOISESUPPRESSION_T48 48
71 #define MXT_SPT_COMMSCONFIG_T18 18
72 #define MXT_SPT_GPIOPWM_T19 19
73 #define MXT_SPT_SELFTEST_T25 25
74 #define MXT_SPT_CTECONFIG_T28 28
75 #define MXT_SPT_USERDATA_T38 38
76 #define MXT_SPT_DIGITIZER_T43 43
77 #define MXT_SPT_MESSAGECOUNT_T44 44
78 #define MXT_SPT_CTECONFIG_T46 46
79
80 /* MXT_GEN_COMMAND_T6 field */
81 #define MXT_COMMAND_RESET 0
82 #define MXT_COMMAND_BACKUPNV 1
83 #define MXT_COMMAND_CALIBRATE 2
84 #define MXT_COMMAND_REPORTALL 3
85 #define MXT_COMMAND_DIAGNOSTIC 5
86
87 /* MXT_GEN_POWER_T7 field */
88 #define MXT_POWER_IDLEACQINT 0
89 #define MXT_POWER_ACTVACQINT 1
90 #define MXT_POWER_ACTV2IDLETO 2
91
92 /* MXT_GEN_ACQUIRE_T8 field */
93 #define MXT_ACQUIRE_CHRGTIME 0
94 #define MXT_ACQUIRE_TCHDRIFT 2
95 #define MXT_ACQUIRE_DRIFTST 3
96 #define MXT_ACQUIRE_TCHAUTOCAL 4
97 #define MXT_ACQUIRE_SYNC 5
98 #define MXT_ACQUIRE_ATCHCALST 6
99 #define MXT_ACQUIRE_ATCHCALSTHR 7
100
101 /* MXT_TOUCH_MULTI_T9 field */
102 #define MXT_TOUCH_CTRL 0
103 #define MXT_TOUCH_XORIGIN 1
104 #define MXT_TOUCH_YORIGIN 2
105 #define MXT_TOUCH_XSIZE 3
106 #define MXT_TOUCH_YSIZE 4
107 #define MXT_TOUCH_BLEN 6
108 #define MXT_TOUCH_TCHTHR 7
109 #define MXT_TOUCH_TCHDI 8
110 #define MXT_TOUCH_ORIENT 9
111 #define MXT_TOUCH_MOVHYSTI 11
112 #define MXT_TOUCH_MOVHYSTN 12
113 #define MXT_TOUCH_NUMTOUCH 14
114 #define MXT_TOUCH_MRGHYST 15
115 #define MXT_TOUCH_MRGTHR 16
116 #define MXT_TOUCH_AMPHYST 17
117 #define MXT_TOUCH_XRANGE_LSB 18
118 #define MXT_TOUCH_XRANGE_MSB 19
119 #define MXT_TOUCH_YRANGE_LSB 20
120 #define MXT_TOUCH_YRANGE_MSB 21
121 #define MXT_TOUCH_XLOCLIP 22
122 #define MXT_TOUCH_XHICLIP 23
123 #define MXT_TOUCH_YLOCLIP 24
124 #define MXT_TOUCH_YHICLIP 25
125 #define MXT_TOUCH_XEDGECTRL 26
126 #define MXT_TOUCH_XEDGEDIST 27
127 #define MXT_TOUCH_YEDGECTRL 28
128 #define MXT_TOUCH_YEDGEDIST 29
129 #define MXT_TOUCH_JUMPLIMIT 30
130
131 /* MXT_PROCI_GRIPFACE_T20 field */
132 #define MXT_GRIPFACE_CTRL 0
133 #define MXT_GRIPFACE_XLOGRIP 1
134 #define MXT_GRIPFACE_XHIGRIP 2
135 #define MXT_GRIPFACE_YLOGRIP 3
136 #define MXT_GRIPFACE_YHIGRIP 4
137 #define MXT_GRIPFACE_MAXTCHS 5
138 #define MXT_GRIPFACE_SZTHR1 7
139 #define MXT_GRIPFACE_SZTHR2 8
140 #define MXT_GRIPFACE_SHPTHR1 9
141 #define MXT_GRIPFACE_SHPTHR2 10
142 #define MXT_GRIPFACE_SUPEXTTO 11
143
144 /* MXT_PROCI_NOISE field */
145 #define MXT_NOISE_CTRL 0
146 #define MXT_NOISE_OUTFLEN 1
147 #define MXT_NOISE_GCAFUL_LSB 3
148 #define MXT_NOISE_GCAFUL_MSB 4
149 #define MXT_NOISE_GCAFLL_LSB 5
150 #define MXT_NOISE_GCAFLL_MSB 6
151 #define MXT_NOISE_ACTVGCAFVALID 7
152 #define MXT_NOISE_NOISETHR 8
153 #define MXT_NOISE_FREQHOPSCALE 10
154 #define MXT_NOISE_FREQ0 11
155 #define MXT_NOISE_FREQ1 12
156 #define MXT_NOISE_FREQ2 13
157 #define MXT_NOISE_FREQ3 14
158 #define MXT_NOISE_FREQ4 15
159 #define MXT_NOISE_IDLEGCAFVALID 16
160
161 /* MXT_SPT_COMMSCONFIG_T18 */
162 #define MXT_COMMS_CTRL 0
163 #define MXT_COMMS_CMD 1
164
165 /* MXT_SPT_CTECONFIG_T28 field */
166 #define MXT_CTE_CTRL 0
167 #define MXT_CTE_CMD 1
168 #define MXT_CTE_MODE 2
169 #define MXT_CTE_IDLEGCAFDEPTH 3
170 #define MXT_CTE_ACTVGCAFDEPTH 4
171 #define MXT_CTE_VOLTAGE 5
172
173 #define MXT_VOLTAGE_DEFAULT 2700000
174 #define MXT_VOLTAGE_STEP 10000
175
176 /* Define for MXT_GEN_COMMAND_T6 */
177 #define MXT_BOOT_VALUE 0xa5
178 #define MXT_BACKUP_VALUE 0x55
179 #define MXT_BACKUP_TIME 25 /* msec */
180 #define MXT_RESET_TIME 65 /* msec */
181
182 #define MXT_FWRESET_TIME 175 /* msec */
183
184 /* Command to unlock bootloader */
185 #define MXT_UNLOCK_CMD_MSB 0xaa
186 #define MXT_UNLOCK_CMD_LSB 0xdc
187
188 /* Bootloader mode status */
189 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
190 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
191 #define MXT_FRAME_CRC_CHECK 0x02
192 #define MXT_FRAME_CRC_FAIL 0x03
193 #define MXT_FRAME_CRC_PASS 0x04
194 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
195 #define MXT_BOOT_STATUS_MASK 0x3f
196
197 /* Touch status */
198 #define MXT_UNGRIP (1 << 0)
199 #define MXT_SUPPRESS (1 << 1)
200 #define MXT_AMP (1 << 2)
201 #define MXT_VECTOR (1 << 3)
202 #define MXT_MOVE (1 << 4)
203 #define MXT_RELEASE (1 << 5)
204 #define MXT_PRESS (1 << 6)
205 #define MXT_DETECT (1 << 7)
206
207 /* Touch orient bits */
208 #define MXT_XY_SWITCH (1 << 0)
209 #define MXT_X_INVERT (1 << 1)
210 #define MXT_Y_INVERT (1 << 2)
211
212 /* Touchscreen absolute values */
213 #define MXT_MAX_AREA 0xff
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; /* Size of each instance - 1 */
229 u8 instances; /* Number of instances - 1 */
230 u8 num_report_ids;
231 } __packed;
232
233 struct mxt_message {
234 u8 reportid;
235 u8 message[7];
236 };
237
238 /* Each client has this additional data */
239 struct mxt_data {
240 struct i2c_client *client;
241 struct input_dev *input_dev;
242 char phys[64]; /* device physical location */
243 const struct mxt_platform_data *pdata;
244 struct mxt_object *object_table;
245 struct mxt_info info;
246 unsigned int irq;
247 unsigned int max_x;
248 unsigned int max_y;
249
250 /* Cached parameters from object table */
251 u8 T6_reportid;
252 u8 T9_reportid_min;
253 u8 T9_reportid_max;
254 };
255
256 static bool mxt_object_readable(unsigned int type)
257 {
258 switch (type) {
259 case MXT_GEN_COMMAND_T6:
260 case MXT_GEN_POWER_T7:
261 case MXT_GEN_ACQUIRE_T8:
262 case MXT_GEN_DATASOURCE_T53:
263 case MXT_TOUCH_MULTI_T9:
264 case MXT_TOUCH_KEYARRAY_T15:
265 case MXT_TOUCH_PROXIMITY_T23:
266 case MXT_TOUCH_PROXKEY_T52:
267 case MXT_PROCI_GRIPFACE_T20:
268 case MXT_PROCG_NOISE_T22:
269 case MXT_PROCI_ONETOUCH_T24:
270 case MXT_PROCI_TWOTOUCH_T27:
271 case MXT_PROCI_GRIP_T40:
272 case MXT_PROCI_PALM_T41:
273 case MXT_PROCI_TOUCHSUPPRESSION_T42:
274 case MXT_PROCI_STYLUS_T47:
275 case MXT_PROCG_NOISESUPPRESSION_T48:
276 case MXT_SPT_COMMSCONFIG_T18:
277 case MXT_SPT_GPIOPWM_T19:
278 case MXT_SPT_SELFTEST_T25:
279 case MXT_SPT_CTECONFIG_T28:
280 case MXT_SPT_USERDATA_T38:
281 case MXT_SPT_DIGITIZER_T43:
282 case MXT_SPT_CTECONFIG_T46:
283 return true;
284 default:
285 return false;
286 }
287 }
288
289 static bool mxt_object_writable(unsigned int type)
290 {
291 switch (type) {
292 case MXT_GEN_COMMAND_T6:
293 case MXT_GEN_POWER_T7:
294 case MXT_GEN_ACQUIRE_T8:
295 case MXT_TOUCH_MULTI_T9:
296 case MXT_TOUCH_KEYARRAY_T15:
297 case MXT_TOUCH_PROXIMITY_T23:
298 case MXT_TOUCH_PROXKEY_T52:
299 case MXT_PROCI_GRIPFACE_T20:
300 case MXT_PROCG_NOISE_T22:
301 case MXT_PROCI_ONETOUCH_T24:
302 case MXT_PROCI_TWOTOUCH_T27:
303 case MXT_PROCI_GRIP_T40:
304 case MXT_PROCI_PALM_T41:
305 case MXT_PROCI_TOUCHSUPPRESSION_T42:
306 case MXT_PROCI_STYLUS_T47:
307 case MXT_PROCG_NOISESUPPRESSION_T48:
308 case MXT_SPT_COMMSCONFIG_T18:
309 case MXT_SPT_GPIOPWM_T19:
310 case MXT_SPT_SELFTEST_T25:
311 case MXT_SPT_CTECONFIG_T28:
312 case MXT_SPT_DIGITIZER_T43:
313 case MXT_SPT_CTECONFIG_T46:
314 return true;
315 default:
316 return false;
317 }
318 }
319
320 static void mxt_dump_message(struct device *dev,
321 struct mxt_message *message)
322 {
323 dev_dbg(dev, "reportid: %u\tmessage: %02x %02x %02x %02x %02x %02x %02x\n",
324 message->reportid, message->message[0], message->message[1],
325 message->message[2], message->message[3], message->message[4],
326 message->message[5], message->message[6]);
327 }
328
329 static int mxt_check_bootloader(struct i2c_client *client,
330 unsigned int state)
331 {
332 u8 val;
333
334 recheck:
335 if (i2c_master_recv(client, &val, 1) != 1) {
336 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
337 return -EIO;
338 }
339
340 switch (state) {
341 case MXT_WAITING_BOOTLOAD_CMD:
342 case MXT_WAITING_FRAME_DATA:
343 val &= ~MXT_BOOT_STATUS_MASK;
344 break;
345 case MXT_FRAME_CRC_PASS:
346 if (val == MXT_FRAME_CRC_CHECK)
347 goto recheck;
348 break;
349 default:
350 return -EINVAL;
351 }
352
353 if (val != state) {
354 dev_err(&client->dev, "Unvalid bootloader mode state\n");
355 return -EINVAL;
356 }
357
358 return 0;
359 }
360
361 static int mxt_unlock_bootloader(struct i2c_client *client)
362 {
363 u8 buf[2];
364
365 buf[0] = MXT_UNLOCK_CMD_LSB;
366 buf[1] = MXT_UNLOCK_CMD_MSB;
367
368 if (i2c_master_send(client, buf, 2) != 2) {
369 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
370 return -EIO;
371 }
372
373 return 0;
374 }
375
376 static int mxt_fw_write(struct i2c_client *client,
377 const u8 *data, unsigned int frame_size)
378 {
379 if (i2c_master_send(client, data, frame_size) != frame_size) {
380 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
381 return -EIO;
382 }
383
384 return 0;
385 }
386
387 static int __mxt_read_reg(struct i2c_client *client,
388 u16 reg, u16 len, void *val)
389 {
390 struct i2c_msg xfer[2];
391 u8 buf[2];
392 int ret;
393
394 buf[0] = reg & 0xff;
395 buf[1] = (reg >> 8) & 0xff;
396
397 /* Write register */
398 xfer[0].addr = client->addr;
399 xfer[0].flags = 0;
400 xfer[0].len = 2;
401 xfer[0].buf = buf;
402
403 /* Read data */
404 xfer[1].addr = client->addr;
405 xfer[1].flags = I2C_M_RD;
406 xfer[1].len = len;
407 xfer[1].buf = val;
408
409 ret = i2c_transfer(client->adapter, xfer, 2);
410 if (ret == 2) {
411 ret = 0;
412 } else {
413 if (ret >= 0)
414 ret = -EIO;
415 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
416 __func__, ret);
417 }
418
419 return ret;
420 }
421
422 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
423 {
424 return __mxt_read_reg(client, reg, 1, val);
425 }
426
427 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
428 const void *val)
429 {
430 u8 *buf;
431 size_t count;
432 int ret;
433
434 count = len + 2;
435 buf = kmalloc(count, GFP_KERNEL);
436 if (!buf)
437 return -ENOMEM;
438
439 buf[0] = reg & 0xff;
440 buf[1] = (reg >> 8) & 0xff;
441 memcpy(&buf[2], val, len);
442
443 ret = i2c_master_send(client, buf, count);
444 if (ret == count) {
445 ret = 0;
446 } else {
447 if (ret >= 0)
448 ret = -EIO;
449 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
450 __func__, ret);
451 }
452
453 kfree(buf);
454 return ret;
455 }
456
457 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
458 {
459 return __mxt_write_reg(client, reg, 1, &val);
460 }
461
462 static struct mxt_object *
463 mxt_get_object(struct mxt_data *data, u8 type)
464 {
465 struct mxt_object *object;
466 int i;
467
468 for (i = 0; i < data->info.object_num; i++) {
469 object = data->object_table + i;
470 if (object->type == type)
471 return object;
472 }
473
474 dev_err(&data->client->dev, "Invalid object type\n");
475 return NULL;
476 }
477
478 static int mxt_read_message(struct mxt_data *data,
479 struct mxt_message *message)
480 {
481 struct mxt_object *object;
482 u16 reg;
483
484 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
485 if (!object)
486 return -EINVAL;
487
488 reg = object->start_address;
489 return __mxt_read_reg(data->client, reg,
490 sizeof(struct mxt_message), message);
491 }
492
493 static int mxt_write_object(struct mxt_data *data,
494 u8 type, u8 offset, u8 val)
495 {
496 struct mxt_object *object;
497 u16 reg;
498
499 object = mxt_get_object(data, type);
500 if (!object || offset >= object->size + 1)
501 return -EINVAL;
502
503 reg = object->start_address;
504 return mxt_write_reg(data->client, reg + offset, val);
505 }
506
507 static void mxt_input_touchevent(struct mxt_data *data,
508 struct mxt_message *message, int id)
509 {
510 struct device *dev = &data->client->dev;
511 u8 status = message->message[0];
512 struct input_dev *input_dev = data->input_dev;
513 int x;
514 int y;
515 int area;
516 int pressure;
517
518 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
519 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
520 if (data->max_x < 1024)
521 x = x >> 2;
522 if (data->max_y < 1024)
523 y = y >> 2;
524
525 area = message->message[4];
526 pressure = message->message[5];
527
528 dev_dbg(dev,
529 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
530 id,
531 (status & MXT_DETECT) ? 'D' : '.',
532 (status & MXT_PRESS) ? 'P' : '.',
533 (status & MXT_RELEASE) ? 'R' : '.',
534 (status & MXT_MOVE) ? 'M' : '.',
535 (status & MXT_VECTOR) ? 'V' : '.',
536 (status & MXT_AMP) ? 'A' : '.',
537 (status & MXT_SUPPRESS) ? 'S' : '.',
538 (status & MXT_UNGRIP) ? 'U' : '.',
539 x, y, area, pressure);
540
541 input_mt_slot(input_dev, id);
542 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
543 status & MXT_DETECT);
544
545 if (status & MXT_DETECT) {
546 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
547 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
548 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
549 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
550 }
551 }
552
553 static unsigned mxt_extract_T6_csum(const u8 *csum)
554 {
555 return csum[0] | (csum[1] << 8) | (csum[2] << 16);
556 }
557
558 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
559 {
560 u8 id = msg->reportid;
561 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
562 }
563
564 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
565 {
566 struct mxt_data *data = dev_id;
567 struct mxt_message message;
568 const u8 *payload = &message.message[0];
569 struct device *dev = &data->client->dev;
570 u8 reportid;
571 bool update_input = false;
572
573 do {
574 if (mxt_read_message(data, &message)) {
575 dev_err(dev, "Failed to read message\n");
576 goto end;
577 }
578
579 reportid = message.reportid;
580
581 if (reportid == data->T6_reportid) {
582 u8 status = payload[0];
583 unsigned csum = mxt_extract_T6_csum(&payload[1]);
584 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
585 status, csum);
586 } else if (mxt_is_T9_message(data, &message)) {
587 int id = reportid - data->T9_reportid_min;
588 mxt_input_touchevent(data, &message, id);
589 update_input = true;
590 } else {
591 mxt_dump_message(dev, &message);
592 }
593 } while (reportid != 0xff);
594
595 if (update_input) {
596 input_mt_report_pointer_emulation(data->input_dev, false);
597 input_sync(data->input_dev);
598 }
599
600 end:
601 return IRQ_HANDLED;
602 }
603
604 static int mxt_check_reg_init(struct mxt_data *data)
605 {
606 const struct mxt_platform_data *pdata = data->pdata;
607 struct mxt_object *object;
608 struct device *dev = &data->client->dev;
609 int index = 0;
610 int i, size;
611 int ret;
612
613 if (!pdata->config) {
614 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
615 return 0;
616 }
617
618 for (i = 0; i < data->info.object_num; i++) {
619 object = data->object_table + i;
620
621 if (!mxt_object_writable(object->type))
622 continue;
623
624 size = (object->size + 1) * (object->instances + 1);
625 if (index + size > pdata->config_length) {
626 dev_err(dev, "Not enough config data!\n");
627 return -EINVAL;
628 }
629
630 ret = __mxt_write_reg(data->client, object->start_address,
631 size, &pdata->config[index]);
632 if (ret)
633 return ret;
634 index += size;
635 }
636
637 return 0;
638 }
639
640 static int mxt_make_highchg(struct mxt_data *data)
641 {
642 struct device *dev = &data->client->dev;
643 struct mxt_message message;
644 int count = 10;
645 int error;
646
647 /* Read dummy message to make high CHG pin */
648 do {
649 error = mxt_read_message(data, &message);
650 if (error)
651 return error;
652 } while (message.reportid != 0xff && --count);
653
654 if (!count) {
655 dev_err(dev, "CHG pin isn't cleared\n");
656 return -EBUSY;
657 }
658
659 return 0;
660 }
661
662 static void mxt_handle_pdata(struct mxt_data *data)
663 {
664 const struct mxt_platform_data *pdata = data->pdata;
665 u8 voltage;
666
667 /* Set touchscreen lines */
668 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
669 pdata->x_line);
670 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
671 pdata->y_line);
672
673 /* Set touchscreen orient */
674 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
675 pdata->orient);
676
677 /* Set touchscreen burst length */
678 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
679 MXT_TOUCH_BLEN, pdata->blen);
680
681 /* Set touchscreen threshold */
682 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
683 MXT_TOUCH_TCHTHR, pdata->threshold);
684
685 /* Set touchscreen resolution */
686 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
687 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
688 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
689 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
690 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
691 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
692 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
693 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
694
695 /* Set touchscreen voltage */
696 if (pdata->voltage) {
697 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
698 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
699 MXT_VOLTAGE_STEP;
700 voltage = 0xff - voltage + 1;
701 } else
702 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
703 MXT_VOLTAGE_STEP;
704
705 mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
706 MXT_CTE_VOLTAGE, voltage);
707 }
708 }
709
710 static int mxt_get_info(struct mxt_data *data)
711 {
712 struct i2c_client *client = data->client;
713 struct mxt_info *info = &data->info;
714 int error;
715
716 /* Read 7-byte info block starting at address 0 */
717 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
718 if (error)
719 return error;
720
721 return 0;
722 }
723
724 static int mxt_get_object_table(struct mxt_data *data)
725 {
726 struct i2c_client *client = data->client;
727 size_t table_size;
728 int error;
729 int i;
730 u8 reportid;
731
732 table_size = data->info.object_num * sizeof(struct mxt_object);
733 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
734 data->object_table);
735 if (error)
736 return error;
737
738 /* Valid Report IDs start counting from 1 */
739 reportid = 1;
740 for (i = 0; i < data->info.object_num; i++) {
741 struct mxt_object *object = data->object_table + i;
742 u8 min_id, max_id;
743
744 le16_to_cpus(&object->start_address);
745
746 if (object->num_report_ids) {
747 min_id = reportid;
748 reportid += object->num_report_ids *
749 (object->instances + 1);
750 max_id = reportid - 1;
751 } else {
752 min_id = 0;
753 max_id = 0;
754 }
755
756 dev_dbg(&data->client->dev,
757 "Type %2d Start %3d Size %3d Instances %2d ReportIDs %3u : %3u\n",
758 object->type, object->start_address, object->size + 1,
759 object->instances + 1, min_id, max_id);
760
761 switch (object->type) {
762 case MXT_GEN_COMMAND_T6:
763 data->T6_reportid = min_id;
764 break;
765 case MXT_TOUCH_MULTI_T9:
766 data->T9_reportid_min = min_id;
767 data->T9_reportid_max = max_id;
768 break;
769 }
770 }
771
772 return 0;
773 }
774
775 static void mxt_free_object_table(struct mxt_data *data)
776 {
777 kfree(data->object_table);
778 data->object_table = NULL;
779 data->T6_reportid = 0;
780 data->T9_reportid_min = 0;
781 data->T9_reportid_max = 0;
782
783 }
784
785 static int mxt_initialize(struct mxt_data *data)
786 {
787 struct i2c_client *client = data->client;
788 struct mxt_info *info = &data->info;
789 int error;
790 u8 val;
791
792 error = mxt_get_info(data);
793 if (error)
794 return error;
795
796 data->object_table = kcalloc(info->object_num,
797 sizeof(struct mxt_object),
798 GFP_KERNEL);
799 if (!data->object_table) {
800 dev_err(&client->dev, "Failed to allocate memory\n");
801 return -ENOMEM;
802 }
803
804 /* Get object table information */
805 error = mxt_get_object_table(data);
806 if (error)
807 goto err_free_object_table;
808
809 /* Check register init values */
810 error = mxt_check_reg_init(data);
811 if (error)
812 goto err_free_object_table;
813
814 mxt_handle_pdata(data);
815
816 /* Backup to memory */
817 mxt_write_object(data, MXT_GEN_COMMAND_T6,
818 MXT_COMMAND_BACKUPNV,
819 MXT_BACKUP_VALUE);
820 msleep(MXT_BACKUP_TIME);
821
822 /* Soft reset */
823 mxt_write_object(data, MXT_GEN_COMMAND_T6,
824 MXT_COMMAND_RESET, 1);
825 msleep(MXT_RESET_TIME);
826
827 /* Update matrix size at info struct */
828 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
829 if (error)
830 goto err_free_object_table;
831 info->matrix_xsize = val;
832
833 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
834 if (error)
835 goto err_free_object_table;
836 info->matrix_ysize = val;
837
838 dev_info(&client->dev,
839 "Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
840 info->family_id, info->variant_id, info->version >> 4,
841 info->version & 0xf, info->build);
842
843 dev_info(&client->dev,
844 "Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
845 info->matrix_xsize, info->matrix_ysize,
846 info->object_num);
847
848 return 0;
849
850 err_free_object_table:
851 mxt_free_object_table(data);
852 return error;
853 }
854
855 static void mxt_calc_resolution(struct mxt_data *data)
856 {
857 unsigned int max_x = data->pdata->x_size - 1;
858 unsigned int max_y = data->pdata->y_size - 1;
859
860 if (data->pdata->orient & MXT_XY_SWITCH) {
861 data->max_x = max_y;
862 data->max_y = max_x;
863 } else {
864 data->max_x = max_x;
865 data->max_y = max_y;
866 }
867 }
868
869 /* Firmware Version is returned as Major.Minor.Build */
870 static ssize_t mxt_fw_version_show(struct device *dev,
871 struct device_attribute *attr, char *buf)
872 {
873 struct mxt_data *data = dev_get_drvdata(dev);
874 struct mxt_info *info = &data->info;
875 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
876 info->version >> 4, info->version & 0xf, info->build);
877 }
878
879 /* Hardware Version is returned as FamilyID.VariantID */
880 static ssize_t mxt_hw_version_show(struct device *dev,
881 struct device_attribute *attr, char *buf)
882 {
883 struct mxt_data *data = dev_get_drvdata(dev);
884 struct mxt_info *info = &data->info;
885 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
886 info->family_id, info->variant_id);
887 }
888
889 static ssize_t mxt_show_instance(char *buf, int count,
890 struct mxt_object *object, int instance,
891 const u8 *val)
892 {
893 int i;
894
895 if (object->instances > 0)
896 count += scnprintf(buf + count, PAGE_SIZE - count,
897 "Instance %u\n", instance);
898
899 for (i = 0; i < object->size + 1; i++)
900 count += scnprintf(buf + count, PAGE_SIZE - count,
901 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
902 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
903
904 return count;
905 }
906
907 static ssize_t mxt_object_show(struct device *dev,
908 struct device_attribute *attr, char *buf)
909 {
910 struct mxt_data *data = dev_get_drvdata(dev);
911 struct mxt_object *object;
912 int count = 0;
913 int i, j;
914 int error;
915 u8 *obuf;
916
917 /* Pre-allocate buffer large enough to hold max sized object. */
918 obuf = kmalloc(256, GFP_KERNEL);
919 if (!obuf)
920 return -ENOMEM;
921
922 error = 0;
923 for (i = 0; i < data->info.object_num; i++) {
924 object = data->object_table + i;
925
926 if (!mxt_object_readable(object->type))
927 continue;
928
929 count += scnprintf(buf + count, PAGE_SIZE - count,
930 "T%u:\n", object->type);
931
932 for (j = 0; j < object->instances + 1; j++) {
933 u16 size = object->size + 1;
934 u16 addr = object->start_address + j * size;
935
936 error = __mxt_read_reg(data->client, addr, size, obuf);
937 if (error)
938 goto done;
939
940 count = mxt_show_instance(buf, count, object, j, obuf);
941 }
942 }
943
944 done:
945 kfree(obuf);
946 return error ?: count;
947 }
948
949 static int mxt_load_fw(struct device *dev, const char *fn)
950 {
951 struct mxt_data *data = dev_get_drvdata(dev);
952 struct i2c_client *client = data->client;
953 const struct firmware *fw = NULL;
954 unsigned int frame_size;
955 unsigned int pos = 0;
956 int ret;
957
958 ret = request_firmware(&fw, fn, dev);
959 if (ret) {
960 dev_err(dev, "Unable to open firmware %s\n", fn);
961 return ret;
962 }
963
964 /* Change to the bootloader mode */
965 mxt_write_object(data, MXT_GEN_COMMAND_T6,
966 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
967 msleep(MXT_RESET_TIME);
968
969 /* Change to slave address of bootloader */
970 if (client->addr == MXT_APP_LOW)
971 client->addr = MXT_BOOT_LOW;
972 else
973 client->addr = MXT_BOOT_HIGH;
974
975 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
976 if (ret)
977 goto out;
978
979 /* Unlock bootloader */
980 mxt_unlock_bootloader(client);
981
982 while (pos < fw->size) {
983 ret = mxt_check_bootloader(client,
984 MXT_WAITING_FRAME_DATA);
985 if (ret)
986 goto out;
987
988 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
989
990 /* We should add 2 at frame size as the the firmware data is not
991 * included the CRC bytes.
992 */
993 frame_size += 2;
994
995 /* Write one frame to device */
996 mxt_fw_write(client, fw->data + pos, frame_size);
997
998 ret = mxt_check_bootloader(client,
999 MXT_FRAME_CRC_PASS);
1000 if (ret)
1001 goto out;
1002
1003 pos += frame_size;
1004
1005 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
1006 }
1007
1008 out:
1009 release_firmware(fw);
1010
1011 /* Change to slave address of application */
1012 if (client->addr == MXT_BOOT_LOW)
1013 client->addr = MXT_APP_LOW;
1014 else
1015 client->addr = MXT_APP_HIGH;
1016
1017 return ret;
1018 }
1019
1020 static ssize_t mxt_update_fw_store(struct device *dev,
1021 struct device_attribute *attr,
1022 const char *buf, size_t count)
1023 {
1024 struct mxt_data *data = dev_get_drvdata(dev);
1025 int error;
1026
1027 disable_irq(data->irq);
1028
1029 error = mxt_load_fw(dev, MXT_FW_NAME);
1030 if (error) {
1031 dev_err(dev, "The firmware update failed(%d)\n", error);
1032 count = error;
1033 } else {
1034 dev_dbg(dev, "The firmware update succeeded\n");
1035
1036 /* Wait for reset */
1037 msleep(MXT_FWRESET_TIME);
1038
1039 mxt_free_object_table(data);
1040
1041 mxt_initialize(data);
1042 }
1043
1044 enable_irq(data->irq);
1045
1046 error = mxt_make_highchg(data);
1047 if (error)
1048 return error;
1049
1050 return count;
1051 }
1052
1053 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1054 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1055 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1056 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1057
1058 static struct attribute *mxt_attrs[] = {
1059 &dev_attr_fw_version.attr,
1060 &dev_attr_hw_version.attr,
1061 &dev_attr_object.attr,
1062 &dev_attr_update_fw.attr,
1063 NULL
1064 };
1065
1066 static const struct attribute_group mxt_attr_group = {
1067 .attrs = mxt_attrs,
1068 };
1069
1070 static void mxt_start(struct mxt_data *data)
1071 {
1072 /* Touch enable */
1073 mxt_write_object(data,
1074 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1075 }
1076
1077 static void mxt_stop(struct mxt_data *data)
1078 {
1079 /* Touch disable */
1080 mxt_write_object(data,
1081 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1082 }
1083
1084 static int mxt_input_open(struct input_dev *dev)
1085 {
1086 struct mxt_data *data = input_get_drvdata(dev);
1087
1088 mxt_start(data);
1089
1090 return 0;
1091 }
1092
1093 static void mxt_input_close(struct input_dev *dev)
1094 {
1095 struct mxt_data *data = input_get_drvdata(dev);
1096
1097 mxt_stop(data);
1098 }
1099
1100 static int __devinit mxt_probe(struct i2c_client *client,
1101 const struct i2c_device_id *id)
1102 {
1103 const struct mxt_platform_data *pdata = client->dev.platform_data;
1104 struct mxt_data *data;
1105 struct input_dev *input_dev;
1106 int error;
1107 unsigned int num_mt_slots;
1108
1109 if (!pdata)
1110 return -EINVAL;
1111
1112 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1113 input_dev = input_allocate_device();
1114 if (!data || !input_dev) {
1115 dev_err(&client->dev, "Failed to allocate memory\n");
1116 error = -ENOMEM;
1117 goto err_free_mem;
1118 }
1119
1120 input_dev->name = "Atmel maXTouch Touchscreen";
1121 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1122 client->adapter->nr, client->addr);
1123 input_dev->phys = data->phys;
1124
1125 input_dev->id.bustype = BUS_I2C;
1126 input_dev->dev.parent = &client->dev;
1127 input_dev->open = mxt_input_open;
1128 input_dev->close = mxt_input_close;
1129
1130 data->client = client;
1131 data->input_dev = input_dev;
1132 data->pdata = pdata;
1133 data->irq = client->irq;
1134
1135 mxt_calc_resolution(data);
1136
1137 error = mxt_initialize(data);
1138 if (error)
1139 goto err_free_mem;
1140
1141 __set_bit(EV_ABS, input_dev->evbit);
1142 __set_bit(EV_KEY, input_dev->evbit);
1143 __set_bit(BTN_TOUCH, input_dev->keybit);
1144
1145 /* For single touch */
1146 input_set_abs_params(input_dev, ABS_X,
1147 0, data->max_x, 0, 0);
1148 input_set_abs_params(input_dev, ABS_Y,
1149 0, data->max_y, 0, 0);
1150 input_set_abs_params(input_dev, ABS_PRESSURE,
1151 0, 255, 0, 0);
1152
1153 /* For multi touch */
1154 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1155 error = input_mt_init_slots(input_dev, num_mt_slots, 0);
1156 if (error)
1157 goto err_free_object;
1158 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1159 0, MXT_MAX_AREA, 0, 0);
1160 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1161 0, data->max_x, 0, 0);
1162 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1163 0, data->max_y, 0, 0);
1164 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1165 0, 255, 0, 0);
1166
1167 input_set_drvdata(input_dev, data);
1168 i2c_set_clientdata(client, data);
1169
1170 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1171 pdata->irqflags | IRQF_ONESHOT,
1172 client->name, data);
1173 if (error) {
1174 dev_err(&client->dev, "Failed to register interrupt\n");
1175 goto err_free_object;
1176 }
1177
1178 error = mxt_make_highchg(data);
1179 if (error)
1180 goto err_free_irq;
1181
1182 error = input_register_device(input_dev);
1183 if (error)
1184 goto err_free_irq;
1185
1186 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1187 if (error)
1188 goto err_unregister_device;
1189
1190 return 0;
1191
1192 err_unregister_device:
1193 input_unregister_device(input_dev);
1194 input_dev = NULL;
1195 err_free_irq:
1196 free_irq(client->irq, data);
1197 err_free_object:
1198 kfree(data->object_table);
1199 err_free_mem:
1200 input_free_device(input_dev);
1201 kfree(data);
1202 return error;
1203 }
1204
1205 static int __devexit mxt_remove(struct i2c_client *client)
1206 {
1207 struct mxt_data *data = i2c_get_clientdata(client);
1208
1209 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1210 free_irq(data->irq, data);
1211 input_unregister_device(data->input_dev);
1212 kfree(data->object_table);
1213 kfree(data);
1214
1215 return 0;
1216 }
1217
1218 #ifdef CONFIG_PM_SLEEP
1219 static int mxt_suspend(struct device *dev)
1220 {
1221 struct i2c_client *client = to_i2c_client(dev);
1222 struct mxt_data *data = i2c_get_clientdata(client);
1223 struct input_dev *input_dev = data->input_dev;
1224
1225 mutex_lock(&input_dev->mutex);
1226
1227 if (input_dev->users)
1228 mxt_stop(data);
1229
1230 mutex_unlock(&input_dev->mutex);
1231
1232 return 0;
1233 }
1234
1235 static int mxt_resume(struct device *dev)
1236 {
1237 struct i2c_client *client = to_i2c_client(dev);
1238 struct mxt_data *data = i2c_get_clientdata(client);
1239 struct input_dev *input_dev = data->input_dev;
1240
1241 /* Soft reset */
1242 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1243 MXT_COMMAND_RESET, 1);
1244
1245 msleep(MXT_RESET_TIME);
1246
1247 mutex_lock(&input_dev->mutex);
1248
1249 if (input_dev->users)
1250 mxt_start(data);
1251
1252 mutex_unlock(&input_dev->mutex);
1253
1254 return 0;
1255 }
1256 #endif
1257
1258 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1259
1260 static const struct i2c_device_id mxt_id[] = {
1261 { "qt602240_ts", 0 },
1262 { "atmel_mxt_ts", 0 },
1263 { "mXT224", 0 },
1264 { }
1265 };
1266 MODULE_DEVICE_TABLE(i2c, mxt_id);
1267
1268 static struct i2c_driver mxt_driver = {
1269 .driver = {
1270 .name = "atmel_mxt_ts",
1271 .owner = THIS_MODULE,
1272 .pm = &mxt_pm_ops,
1273 },
1274 .probe = mxt_probe,
1275 .remove = __devexit_p(mxt_remove),
1276 .id_table = mxt_id,
1277 };
1278
1279 module_i2c_driver(mxt_driver);
1280
1281 /* Module information */
1282 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1283 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1284 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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