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Input: atmel_mxt_ts - use T9 reportid range to init number of mt slots
[mirror_ubuntu-jammy-kernel.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 T9_reportid_min;
252 u8 T9_reportid_max;
253 };
254
255 static bool mxt_object_readable(unsigned int type)
256 {
257 switch (type) {
258 case MXT_GEN_COMMAND_T6:
259 case MXT_GEN_POWER_T7:
260 case MXT_GEN_ACQUIRE_T8:
261 case MXT_GEN_DATASOURCE_T53:
262 case MXT_TOUCH_MULTI_T9:
263 case MXT_TOUCH_KEYARRAY_T15:
264 case MXT_TOUCH_PROXIMITY_T23:
265 case MXT_TOUCH_PROXKEY_T52:
266 case MXT_PROCI_GRIPFACE_T20:
267 case MXT_PROCG_NOISE_T22:
268 case MXT_PROCI_ONETOUCH_T24:
269 case MXT_PROCI_TWOTOUCH_T27:
270 case MXT_PROCI_GRIP_T40:
271 case MXT_PROCI_PALM_T41:
272 case MXT_PROCI_TOUCHSUPPRESSION_T42:
273 case MXT_PROCI_STYLUS_T47:
274 case MXT_PROCG_NOISESUPPRESSION_T48:
275 case MXT_SPT_COMMSCONFIG_T18:
276 case MXT_SPT_GPIOPWM_T19:
277 case MXT_SPT_SELFTEST_T25:
278 case MXT_SPT_CTECONFIG_T28:
279 case MXT_SPT_USERDATA_T38:
280 case MXT_SPT_DIGITIZER_T43:
281 case MXT_SPT_CTECONFIG_T46:
282 return true;
283 default:
284 return false;
285 }
286 }
287
288 static bool mxt_object_writable(unsigned int type)
289 {
290 switch (type) {
291 case MXT_GEN_COMMAND_T6:
292 case MXT_GEN_POWER_T7:
293 case MXT_GEN_ACQUIRE_T8:
294 case MXT_TOUCH_MULTI_T9:
295 case MXT_TOUCH_KEYARRAY_T15:
296 case MXT_TOUCH_PROXIMITY_T23:
297 case MXT_TOUCH_PROXKEY_T52:
298 case MXT_PROCI_GRIPFACE_T20:
299 case MXT_PROCG_NOISE_T22:
300 case MXT_PROCI_ONETOUCH_T24:
301 case MXT_PROCI_TWOTOUCH_T27:
302 case MXT_PROCI_GRIP_T40:
303 case MXT_PROCI_PALM_T41:
304 case MXT_PROCI_TOUCHSUPPRESSION_T42:
305 case MXT_PROCI_STYLUS_T47:
306 case MXT_PROCG_NOISESUPPRESSION_T48:
307 case MXT_SPT_COMMSCONFIG_T18:
308 case MXT_SPT_GPIOPWM_T19:
309 case MXT_SPT_SELFTEST_T25:
310 case MXT_SPT_CTECONFIG_T28:
311 case MXT_SPT_DIGITIZER_T43:
312 case MXT_SPT_CTECONFIG_T46:
313 return true;
314 default:
315 return false;
316 }
317 }
318
319 static void mxt_dump_message(struct device *dev,
320 struct mxt_message *message)
321 {
322 dev_dbg(dev, "reportid: %u\tmessage: %02x %02x %02x %02x %02x %02x %02x\n",
323 message->reportid, message->message[0], message->message[1],
324 message->message[2], message->message[3], message->message[4],
325 message->message[5], message->message[6]);
326 }
327
328 static int mxt_check_bootloader(struct i2c_client *client,
329 unsigned int state)
330 {
331 u8 val;
332
333 recheck:
334 if (i2c_master_recv(client, &val, 1) != 1) {
335 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
336 return -EIO;
337 }
338
339 switch (state) {
340 case MXT_WAITING_BOOTLOAD_CMD:
341 case MXT_WAITING_FRAME_DATA:
342 val &= ~MXT_BOOT_STATUS_MASK;
343 break;
344 case MXT_FRAME_CRC_PASS:
345 if (val == MXT_FRAME_CRC_CHECK)
346 goto recheck;
347 break;
348 default:
349 return -EINVAL;
350 }
351
352 if (val != state) {
353 dev_err(&client->dev, "Unvalid bootloader mode state\n");
354 return -EINVAL;
355 }
356
357 return 0;
358 }
359
360 static int mxt_unlock_bootloader(struct i2c_client *client)
361 {
362 u8 buf[2];
363
364 buf[0] = MXT_UNLOCK_CMD_LSB;
365 buf[1] = MXT_UNLOCK_CMD_MSB;
366
367 if (i2c_master_send(client, buf, 2) != 2) {
368 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
369 return -EIO;
370 }
371
372 return 0;
373 }
374
375 static int mxt_fw_write(struct i2c_client *client,
376 const u8 *data, unsigned int frame_size)
377 {
378 if (i2c_master_send(client, data, frame_size) != frame_size) {
379 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
380 return -EIO;
381 }
382
383 return 0;
384 }
385
386 static int __mxt_read_reg(struct i2c_client *client,
387 u16 reg, u16 len, void *val)
388 {
389 struct i2c_msg xfer[2];
390 u8 buf[2];
391 int ret;
392
393 buf[0] = reg & 0xff;
394 buf[1] = (reg >> 8) & 0xff;
395
396 /* Write register */
397 xfer[0].addr = client->addr;
398 xfer[0].flags = 0;
399 xfer[0].len = 2;
400 xfer[0].buf = buf;
401
402 /* Read data */
403 xfer[1].addr = client->addr;
404 xfer[1].flags = I2C_M_RD;
405 xfer[1].len = len;
406 xfer[1].buf = val;
407
408 ret = i2c_transfer(client->adapter, xfer, 2);
409 if (ret == 2) {
410 ret = 0;
411 } else {
412 if (ret >= 0)
413 ret = -EIO;
414 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
415 __func__, ret);
416 }
417
418 return ret;
419 }
420
421 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
422 {
423 return __mxt_read_reg(client, reg, 1, val);
424 }
425
426 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
427 const void *val)
428 {
429 u8 *buf;
430 size_t count;
431 int ret;
432
433 count = len + 2;
434 buf = kmalloc(count, GFP_KERNEL);
435 if (!buf)
436 return -ENOMEM;
437
438 buf[0] = reg & 0xff;
439 buf[1] = (reg >> 8) & 0xff;
440 memcpy(&buf[2], val, len);
441
442 ret = i2c_master_send(client, buf, count);
443 if (ret == count) {
444 ret = 0;
445 } else {
446 if (ret >= 0)
447 ret = -EIO;
448 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
449 __func__, ret);
450 }
451
452 kfree(buf);
453 return ret;
454 }
455
456 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
457 {
458 return __mxt_write_reg(client, reg, 1, &val);
459 }
460
461 static struct mxt_object *
462 mxt_get_object(struct mxt_data *data, u8 type)
463 {
464 struct mxt_object *object;
465 int i;
466
467 for (i = 0; i < data->info.object_num; i++) {
468 object = data->object_table + i;
469 if (object->type == type)
470 return object;
471 }
472
473 dev_err(&data->client->dev, "Invalid object type\n");
474 return NULL;
475 }
476
477 static int mxt_read_message(struct mxt_data *data,
478 struct mxt_message *message)
479 {
480 struct mxt_object *object;
481 u16 reg;
482
483 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
484 if (!object)
485 return -EINVAL;
486
487 reg = object->start_address;
488 return __mxt_read_reg(data->client, reg,
489 sizeof(struct mxt_message), message);
490 }
491
492 static int mxt_write_object(struct mxt_data *data,
493 u8 type, u8 offset, u8 val)
494 {
495 struct mxt_object *object;
496 u16 reg;
497
498 object = mxt_get_object(data, type);
499 if (!object || offset >= object->size + 1)
500 return -EINVAL;
501
502 reg = object->start_address;
503 return mxt_write_reg(data->client, reg + offset, val);
504 }
505
506 static void mxt_input_touchevent(struct mxt_data *data,
507 struct mxt_message *message, int id)
508 {
509 struct device *dev = &data->client->dev;
510 u8 status = message->message[0];
511 struct input_dev *input_dev = data->input_dev;
512 int x;
513 int y;
514 int area;
515 int pressure;
516
517 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
518 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
519 if (data->max_x < 1024)
520 x = x >> 2;
521 if (data->max_y < 1024)
522 y = y >> 2;
523
524 area = message->message[4];
525 pressure = message->message[5];
526
527 dev_dbg(dev,
528 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
529 id,
530 (status & MXT_DETECT) ? 'D' : '.',
531 (status & MXT_PRESS) ? 'P' : '.',
532 (status & MXT_RELEASE) ? 'R' : '.',
533 (status & MXT_MOVE) ? 'M' : '.',
534 (status & MXT_VECTOR) ? 'V' : '.',
535 (status & MXT_AMP) ? 'A' : '.',
536 (status & MXT_SUPPRESS) ? 'S' : '.',
537 (status & MXT_UNGRIP) ? 'U' : '.',
538 x, y, area, pressure);
539
540 input_mt_slot(input_dev, id);
541 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
542 status & MXT_DETECT);
543
544 if (status & MXT_DETECT) {
545 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
546 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
547 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
548 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
549 }
550
551 input_mt_report_pointer_emulation(input_dev, false);
552 input_sync(input_dev);
553 }
554
555 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
556 {
557 u8 id = msg->reportid;
558 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
559 }
560
561 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
562 {
563 struct mxt_data *data = dev_id;
564 struct mxt_message message;
565 struct device *dev = &data->client->dev;
566 int id;
567 u8 reportid;
568
569 do {
570 if (mxt_read_message(data, &message)) {
571 dev_err(dev, "Failed to read message\n");
572 goto end;
573 }
574
575 reportid = message.reportid;
576
577 id = reportid - data->T9_reportid_min;
578
579 if (mxt_is_T9_message(data, &message))
580 mxt_input_touchevent(data, &message, id);
581 else
582 mxt_dump_message(dev, &message);
583 } while (reportid != 0xff);
584
585 end:
586 return IRQ_HANDLED;
587 }
588
589 static int mxt_check_reg_init(struct mxt_data *data)
590 {
591 const struct mxt_platform_data *pdata = data->pdata;
592 struct mxt_object *object;
593 struct device *dev = &data->client->dev;
594 int index = 0;
595 int i, size;
596 int ret;
597
598 if (!pdata->config) {
599 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
600 return 0;
601 }
602
603 for (i = 0; i < data->info.object_num; i++) {
604 object = data->object_table + i;
605
606 if (!mxt_object_writable(object->type))
607 continue;
608
609 size = (object->size + 1) * (object->instances + 1);
610 if (index + size > pdata->config_length) {
611 dev_err(dev, "Not enough config data!\n");
612 return -EINVAL;
613 }
614
615 ret = __mxt_write_reg(data->client, object->start_address,
616 size, &pdata->config[index]);
617 if (ret)
618 return ret;
619 index += size;
620 }
621
622 return 0;
623 }
624
625 static int mxt_make_highchg(struct mxt_data *data)
626 {
627 struct device *dev = &data->client->dev;
628 struct mxt_message message;
629 int count = 10;
630 int error;
631
632 /* Read dummy message to make high CHG pin */
633 do {
634 error = mxt_read_message(data, &message);
635 if (error)
636 return error;
637 } while (message.reportid != 0xff && --count);
638
639 if (!count) {
640 dev_err(dev, "CHG pin isn't cleared\n");
641 return -EBUSY;
642 }
643
644 return 0;
645 }
646
647 static void mxt_handle_pdata(struct mxt_data *data)
648 {
649 const struct mxt_platform_data *pdata = data->pdata;
650 u8 voltage;
651
652 /* Set touchscreen lines */
653 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
654 pdata->x_line);
655 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
656 pdata->y_line);
657
658 /* Set touchscreen orient */
659 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
660 pdata->orient);
661
662 /* Set touchscreen burst length */
663 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
664 MXT_TOUCH_BLEN, pdata->blen);
665
666 /* Set touchscreen threshold */
667 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
668 MXT_TOUCH_TCHTHR, pdata->threshold);
669
670 /* Set touchscreen resolution */
671 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
672 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
673 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
674 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
675 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
676 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
677 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
678 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
679
680 /* Set touchscreen voltage */
681 if (pdata->voltage) {
682 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
683 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
684 MXT_VOLTAGE_STEP;
685 voltage = 0xff - voltage + 1;
686 } else
687 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
688 MXT_VOLTAGE_STEP;
689
690 mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
691 MXT_CTE_VOLTAGE, voltage);
692 }
693 }
694
695 static int mxt_get_info(struct mxt_data *data)
696 {
697 struct i2c_client *client = data->client;
698 struct mxt_info *info = &data->info;
699 int error;
700
701 /* Read 7-byte info block starting at address 0 */
702 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
703 if (error)
704 return error;
705
706 return 0;
707 }
708
709 static int mxt_get_object_table(struct mxt_data *data)
710 {
711 struct i2c_client *client = data->client;
712 size_t table_size;
713 int error;
714 int i;
715 u8 reportid;
716
717 table_size = data->info.object_num * sizeof(struct mxt_object);
718 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
719 data->object_table);
720 if (error)
721 return error;
722
723 /* Valid Report IDs start counting from 1 */
724 reportid = 1;
725 for (i = 0; i < data->info.object_num; i++) {
726 struct mxt_object *object = data->object_table + i;
727 u8 min_id, max_id;
728
729 le16_to_cpus(&object->start_address);
730
731 if (object->num_report_ids) {
732 min_id = reportid;
733 reportid += object->num_report_ids *
734 (object->instances + 1);
735 max_id = reportid - 1;
736 } else {
737 min_id = 0;
738 max_id = 0;
739 }
740
741 dev_dbg(&data->client->dev,
742 "Type %2d Start %3d Size %3d Instances %2d ReportIDs %3u : %3u\n",
743 object->type, object->start_address, object->size + 1,
744 object->instances + 1, min_id, max_id);
745
746 switch (object->type) {
747 case MXT_TOUCH_MULTI_T9:
748 data->T9_reportid_min = min_id;
749 data->T9_reportid_max = max_id;
750 break;
751 }
752 }
753
754 return 0;
755 }
756
757 static void mxt_free_object_table(struct mxt_data *data)
758 {
759 kfree(data->object_table);
760 data->object_table = NULL;
761 data->T9_reportid_min = 0;
762 data->T9_reportid_max = 0;
763 }
764
765 static int mxt_initialize(struct mxt_data *data)
766 {
767 struct i2c_client *client = data->client;
768 struct mxt_info *info = &data->info;
769 int error;
770 u8 val;
771
772 error = mxt_get_info(data);
773 if (error)
774 return error;
775
776 data->object_table = kcalloc(info->object_num,
777 sizeof(struct mxt_object),
778 GFP_KERNEL);
779 if (!data->object_table) {
780 dev_err(&client->dev, "Failed to allocate memory\n");
781 return -ENOMEM;
782 }
783
784 /* Get object table information */
785 error = mxt_get_object_table(data);
786 if (error)
787 goto err_free_object_table;
788
789 /* Check register init values */
790 error = mxt_check_reg_init(data);
791 if (error)
792 goto err_free_object_table;
793
794 mxt_handle_pdata(data);
795
796 /* Backup to memory */
797 mxt_write_object(data, MXT_GEN_COMMAND_T6,
798 MXT_COMMAND_BACKUPNV,
799 MXT_BACKUP_VALUE);
800 msleep(MXT_BACKUP_TIME);
801
802 /* Soft reset */
803 mxt_write_object(data, MXT_GEN_COMMAND_T6,
804 MXT_COMMAND_RESET, 1);
805 msleep(MXT_RESET_TIME);
806
807 /* Update matrix size at info struct */
808 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
809 if (error)
810 goto err_free_object_table;
811 info->matrix_xsize = val;
812
813 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
814 if (error)
815 goto err_free_object_table;
816 info->matrix_ysize = val;
817
818 dev_info(&client->dev,
819 "Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
820 info->family_id, info->variant_id, info->version >> 4,
821 info->version & 0xf, info->build);
822
823 dev_info(&client->dev,
824 "Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
825 info->matrix_xsize, info->matrix_ysize,
826 info->object_num);
827
828 return 0;
829
830 err_free_object_table:
831 mxt_free_object_table(data);
832 return error;
833 }
834
835 static void mxt_calc_resolution(struct mxt_data *data)
836 {
837 unsigned int max_x = data->pdata->x_size - 1;
838 unsigned int max_y = data->pdata->y_size - 1;
839
840 if (data->pdata->orient & MXT_XY_SWITCH) {
841 data->max_x = max_y;
842 data->max_y = max_x;
843 } else {
844 data->max_x = max_x;
845 data->max_y = max_y;
846 }
847 }
848
849 /* Firmware Version is returned as Major.Minor.Build */
850 static ssize_t mxt_fw_version_show(struct device *dev,
851 struct device_attribute *attr, char *buf)
852 {
853 struct mxt_data *data = dev_get_drvdata(dev);
854 struct mxt_info *info = &data->info;
855 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
856 info->version >> 4, info->version & 0xf, info->build);
857 }
858
859 /* Hardware Version is returned as FamilyID.VariantID */
860 static ssize_t mxt_hw_version_show(struct device *dev,
861 struct device_attribute *attr, char *buf)
862 {
863 struct mxt_data *data = dev_get_drvdata(dev);
864 struct mxt_info *info = &data->info;
865 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
866 info->family_id, info->variant_id);
867 }
868
869 static ssize_t mxt_show_instance(char *buf, int count,
870 struct mxt_object *object, int instance,
871 const u8 *val)
872 {
873 int i;
874
875 if (object->instances > 0)
876 count += scnprintf(buf + count, PAGE_SIZE - count,
877 "Instance %u\n", instance);
878
879 for (i = 0; i < object->size + 1; i++)
880 count += scnprintf(buf + count, PAGE_SIZE - count,
881 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
882 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
883
884 return count;
885 }
886
887 static ssize_t mxt_object_show(struct device *dev,
888 struct device_attribute *attr, char *buf)
889 {
890 struct mxt_data *data = dev_get_drvdata(dev);
891 struct mxt_object *object;
892 int count = 0;
893 int i, j;
894 int error;
895 u8 *obuf;
896
897 /* Pre-allocate buffer large enough to hold max sized object. */
898 obuf = kmalloc(256, GFP_KERNEL);
899 if (!obuf)
900 return -ENOMEM;
901
902 error = 0;
903 for (i = 0; i < data->info.object_num; i++) {
904 object = data->object_table + i;
905
906 if (!mxt_object_readable(object->type))
907 continue;
908
909 count += scnprintf(buf + count, PAGE_SIZE - count,
910 "T%u:\n", object->type);
911
912 for (j = 0; j < object->instances + 1; j++) {
913 u16 size = object->size + 1;
914 u16 addr = object->start_address + j * size;
915
916 error = __mxt_read_reg(data->client, addr, size, obuf);
917 if (error)
918 goto done;
919
920 count = mxt_show_instance(buf, count, object, j, obuf);
921 }
922 }
923
924 done:
925 kfree(obuf);
926 return error ?: count;
927 }
928
929 static int mxt_load_fw(struct device *dev, const char *fn)
930 {
931 struct mxt_data *data = dev_get_drvdata(dev);
932 struct i2c_client *client = data->client;
933 const struct firmware *fw = NULL;
934 unsigned int frame_size;
935 unsigned int pos = 0;
936 int ret;
937
938 ret = request_firmware(&fw, fn, dev);
939 if (ret) {
940 dev_err(dev, "Unable to open firmware %s\n", fn);
941 return ret;
942 }
943
944 /* Change to the bootloader mode */
945 mxt_write_object(data, MXT_GEN_COMMAND_T6,
946 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
947 msleep(MXT_RESET_TIME);
948
949 /* Change to slave address of bootloader */
950 if (client->addr == MXT_APP_LOW)
951 client->addr = MXT_BOOT_LOW;
952 else
953 client->addr = MXT_BOOT_HIGH;
954
955 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
956 if (ret)
957 goto out;
958
959 /* Unlock bootloader */
960 mxt_unlock_bootloader(client);
961
962 while (pos < fw->size) {
963 ret = mxt_check_bootloader(client,
964 MXT_WAITING_FRAME_DATA);
965 if (ret)
966 goto out;
967
968 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
969
970 /* We should add 2 at frame size as the the firmware data is not
971 * included the CRC bytes.
972 */
973 frame_size += 2;
974
975 /* Write one frame to device */
976 mxt_fw_write(client, fw->data + pos, frame_size);
977
978 ret = mxt_check_bootloader(client,
979 MXT_FRAME_CRC_PASS);
980 if (ret)
981 goto out;
982
983 pos += frame_size;
984
985 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
986 }
987
988 out:
989 release_firmware(fw);
990
991 /* Change to slave address of application */
992 if (client->addr == MXT_BOOT_LOW)
993 client->addr = MXT_APP_LOW;
994 else
995 client->addr = MXT_APP_HIGH;
996
997 return ret;
998 }
999
1000 static ssize_t mxt_update_fw_store(struct device *dev,
1001 struct device_attribute *attr,
1002 const char *buf, size_t count)
1003 {
1004 struct mxt_data *data = dev_get_drvdata(dev);
1005 int error;
1006
1007 disable_irq(data->irq);
1008
1009 error = mxt_load_fw(dev, MXT_FW_NAME);
1010 if (error) {
1011 dev_err(dev, "The firmware update failed(%d)\n", error);
1012 count = error;
1013 } else {
1014 dev_dbg(dev, "The firmware update succeeded\n");
1015
1016 /* Wait for reset */
1017 msleep(MXT_FWRESET_TIME);
1018
1019 mxt_free_object_table(data);
1020
1021 mxt_initialize(data);
1022 }
1023
1024 enable_irq(data->irq);
1025
1026 error = mxt_make_highchg(data);
1027 if (error)
1028 return error;
1029
1030 return count;
1031 }
1032
1033 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1034 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1035 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1036 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1037
1038 static struct attribute *mxt_attrs[] = {
1039 &dev_attr_fw_version.attr,
1040 &dev_attr_hw_version.attr,
1041 &dev_attr_object.attr,
1042 &dev_attr_update_fw.attr,
1043 NULL
1044 };
1045
1046 static const struct attribute_group mxt_attr_group = {
1047 .attrs = mxt_attrs,
1048 };
1049
1050 static void mxt_start(struct mxt_data *data)
1051 {
1052 /* Touch enable */
1053 mxt_write_object(data,
1054 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1055 }
1056
1057 static void mxt_stop(struct mxt_data *data)
1058 {
1059 /* Touch disable */
1060 mxt_write_object(data,
1061 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1062 }
1063
1064 static int mxt_input_open(struct input_dev *dev)
1065 {
1066 struct mxt_data *data = input_get_drvdata(dev);
1067
1068 mxt_start(data);
1069
1070 return 0;
1071 }
1072
1073 static void mxt_input_close(struct input_dev *dev)
1074 {
1075 struct mxt_data *data = input_get_drvdata(dev);
1076
1077 mxt_stop(data);
1078 }
1079
1080 static int __devinit mxt_probe(struct i2c_client *client,
1081 const struct i2c_device_id *id)
1082 {
1083 const struct mxt_platform_data *pdata = client->dev.platform_data;
1084 struct mxt_data *data;
1085 struct input_dev *input_dev;
1086 int error;
1087 unsigned int num_mt_slots;
1088
1089 if (!pdata)
1090 return -EINVAL;
1091
1092 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1093 input_dev = input_allocate_device();
1094 if (!data || !input_dev) {
1095 dev_err(&client->dev, "Failed to allocate memory\n");
1096 error = -ENOMEM;
1097 goto err_free_mem;
1098 }
1099
1100 input_dev->name = "Atmel maXTouch Touchscreen";
1101 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1102 client->adapter->nr, client->addr);
1103 input_dev->phys = data->phys;
1104
1105 input_dev->id.bustype = BUS_I2C;
1106 input_dev->dev.parent = &client->dev;
1107 input_dev->open = mxt_input_open;
1108 input_dev->close = mxt_input_close;
1109
1110 data->client = client;
1111 data->input_dev = input_dev;
1112 data->pdata = pdata;
1113 data->irq = client->irq;
1114
1115 mxt_calc_resolution(data);
1116
1117 error = mxt_initialize(data);
1118 if (error)
1119 goto err_free_mem;
1120
1121 __set_bit(EV_ABS, input_dev->evbit);
1122 __set_bit(EV_KEY, input_dev->evbit);
1123 __set_bit(BTN_TOUCH, input_dev->keybit);
1124
1125 /* For single touch */
1126 input_set_abs_params(input_dev, ABS_X,
1127 0, data->max_x, 0, 0);
1128 input_set_abs_params(input_dev, ABS_Y,
1129 0, data->max_y, 0, 0);
1130 input_set_abs_params(input_dev, ABS_PRESSURE,
1131 0, 255, 0, 0);
1132
1133 /* For multi touch */
1134 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1135 error = input_mt_init_slots(input_dev, num_mt_slots);
1136 if (error)
1137 goto err_free_object;
1138 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1139 0, MXT_MAX_AREA, 0, 0);
1140 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1141 0, data->max_x, 0, 0);
1142 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1143 0, data->max_y, 0, 0);
1144 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1145 0, 255, 0, 0);
1146
1147 input_set_drvdata(input_dev, data);
1148 i2c_set_clientdata(client, data);
1149
1150 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1151 pdata->irqflags, client->name, data);
1152 if (error) {
1153 dev_err(&client->dev, "Failed to register interrupt\n");
1154 goto err_free_object;
1155 }
1156
1157 error = mxt_make_highchg(data);
1158 if (error)
1159 goto err_free_irq;
1160
1161 error = input_register_device(input_dev);
1162 if (error)
1163 goto err_free_irq;
1164
1165 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1166 if (error)
1167 dev_warn(&client->dev, "error creating sysfs entries.\n");
1168
1169 return 0;
1170
1171 err_free_irq:
1172 free_irq(client->irq, data);
1173 err_free_object:
1174 kfree(data->object_table);
1175 err_free_mem:
1176 input_free_device(input_dev);
1177 kfree(data);
1178 return error;
1179 }
1180
1181 static int __devexit mxt_remove(struct i2c_client *client)
1182 {
1183 struct mxt_data *data = i2c_get_clientdata(client);
1184
1185 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1186 free_irq(data->irq, data);
1187 input_unregister_device(data->input_dev);
1188 kfree(data->object_table);
1189 kfree(data);
1190
1191 return 0;
1192 }
1193
1194 #ifdef CONFIG_PM_SLEEP
1195 static int mxt_suspend(struct device *dev)
1196 {
1197 struct i2c_client *client = to_i2c_client(dev);
1198 struct mxt_data *data = i2c_get_clientdata(client);
1199 struct input_dev *input_dev = data->input_dev;
1200
1201 mutex_lock(&input_dev->mutex);
1202
1203 if (input_dev->users)
1204 mxt_stop(data);
1205
1206 mutex_unlock(&input_dev->mutex);
1207
1208 return 0;
1209 }
1210
1211 static int mxt_resume(struct device *dev)
1212 {
1213 struct i2c_client *client = to_i2c_client(dev);
1214 struct mxt_data *data = i2c_get_clientdata(client);
1215 struct input_dev *input_dev = data->input_dev;
1216
1217 /* Soft reset */
1218 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1219 MXT_COMMAND_RESET, 1);
1220
1221 msleep(MXT_RESET_TIME);
1222
1223 mutex_lock(&input_dev->mutex);
1224
1225 if (input_dev->users)
1226 mxt_start(data);
1227
1228 mutex_unlock(&input_dev->mutex);
1229
1230 return 0;
1231 }
1232 #endif
1233
1234 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1235
1236 static const struct i2c_device_id mxt_id[] = {
1237 { "qt602240_ts", 0 },
1238 { "atmel_mxt_ts", 0 },
1239 { "mXT224", 0 },
1240 { }
1241 };
1242 MODULE_DEVICE_TABLE(i2c, mxt_id);
1243
1244 static struct i2c_driver mxt_driver = {
1245 .driver = {
1246 .name = "atmel_mxt_ts",
1247 .owner = THIS_MODULE,
1248 .pm = &mxt_pm_ops,
1249 },
1250 .probe = mxt_probe,
1251 .remove = __devexit_p(mxt_remove),
1252 .id_table = mxt_id,
1253 };
1254
1255 module_i2c_driver(mxt_driver);
1256
1257 /* Module information */
1258 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1259 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1260 MODULE_LICENSE("GPL");
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