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mfd: wm8350-i2c: Make sure the i2c regmap functions are compiled
[linux/fpc-iii.git] / drivers / input / touchscreen / atmel_mxt_ts.c
blob59aa24002c7bff9e1f8629787c7c0ce9eea36886
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 50 /* msec */
180 #define MXT_RESET_TIME 200 /* msec */
181
182 #define MXT_FWRESET_TIME 175 /* msec */
183
184 /* MXT_SPT_GPIOPWM_T19 field */
185 #define MXT_GPIO0_MASK 0x04
186 #define MXT_GPIO1_MASK 0x08
187 #define MXT_GPIO2_MASK 0x10
188 #define MXT_GPIO3_MASK 0x20
189
190 /* Command to unlock bootloader */
191 #define MXT_UNLOCK_CMD_MSB 0xaa
192 #define MXT_UNLOCK_CMD_LSB 0xdc
193
194 /* Bootloader mode status */
195 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
196 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
197 #define MXT_FRAME_CRC_CHECK 0x02
198 #define MXT_FRAME_CRC_FAIL 0x03
199 #define MXT_FRAME_CRC_PASS 0x04
200 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
201 #define MXT_BOOT_STATUS_MASK 0x3f
202
203 /* Touch status */
204 #define MXT_UNGRIP (1 << 0)
205 #define MXT_SUPPRESS (1 << 1)
206 #define MXT_AMP (1 << 2)
207 #define MXT_VECTOR (1 << 3)
208 #define MXT_MOVE (1 << 4)
209 #define MXT_RELEASE (1 << 5)
210 #define MXT_PRESS (1 << 6)
211 #define MXT_DETECT (1 << 7)
212
213 /* Touch orient bits */
214 #define MXT_XY_SWITCH (1 << 0)
215 #define MXT_X_INVERT (1 << 1)
216 #define MXT_Y_INVERT (1 << 2)
217
218 /* Touchscreen absolute values */
219 #define MXT_MAX_AREA 0xff
220
221 #define MXT_PIXELS_PER_MM 20
222
223 struct mxt_info {
224 u8 family_id;
225 u8 variant_id;
226 u8 version;
227 u8 build;
228 u8 matrix_xsize;
229 u8 matrix_ysize;
230 u8 object_num;
231 };
232
233 struct mxt_object {
234 u8 type;
235 u16 start_address;
236 u8 size; /* Size of each instance - 1 */
237 u8 instances; /* Number of instances - 1 */
238 u8 num_report_ids;
239 } __packed;
240
241 struct mxt_message {
242 u8 reportid;
243 u8 message[7];
244 };
245
246 /* Each client has this additional data */
247 struct mxt_data {
248 struct i2c_client *client;
249 struct input_dev *input_dev;
250 char phys[64]; /* device physical location */
251 const struct mxt_platform_data *pdata;
252 struct mxt_object *object_table;
253 struct mxt_info info;
254 bool is_tp;
255
256 unsigned int irq;
257 unsigned int max_x;
258 unsigned int max_y;
259
260 /* Cached parameters from object table */
261 u8 T6_reportid;
262 u8 T9_reportid_min;
263 u8 T9_reportid_max;
264 u8 T19_reportid;
265 };
266
267 static bool mxt_object_readable(unsigned int type)
268 {
269 switch (type) {
270 case MXT_GEN_COMMAND_T6:
271 case MXT_GEN_POWER_T7:
272 case MXT_GEN_ACQUIRE_T8:
273 case MXT_GEN_DATASOURCE_T53:
274 case MXT_TOUCH_MULTI_T9:
275 case MXT_TOUCH_KEYARRAY_T15:
276 case MXT_TOUCH_PROXIMITY_T23:
277 case MXT_TOUCH_PROXKEY_T52:
278 case MXT_PROCI_GRIPFACE_T20:
279 case MXT_PROCG_NOISE_T22:
280 case MXT_PROCI_ONETOUCH_T24:
281 case MXT_PROCI_TWOTOUCH_T27:
282 case MXT_PROCI_GRIP_T40:
283 case MXT_PROCI_PALM_T41:
284 case MXT_PROCI_TOUCHSUPPRESSION_T42:
285 case MXT_PROCI_STYLUS_T47:
286 case MXT_PROCG_NOISESUPPRESSION_T48:
287 case MXT_SPT_COMMSCONFIG_T18:
288 case MXT_SPT_GPIOPWM_T19:
289 case MXT_SPT_SELFTEST_T25:
290 case MXT_SPT_CTECONFIG_T28:
291 case MXT_SPT_USERDATA_T38:
292 case MXT_SPT_DIGITIZER_T43:
293 case MXT_SPT_CTECONFIG_T46:
294 return true;
295 default:
296 return false;
297 }
298 }
299
300 static bool mxt_object_writable(unsigned int type)
301 {
302 switch (type) {
303 case MXT_GEN_COMMAND_T6:
304 case MXT_GEN_POWER_T7:
305 case MXT_GEN_ACQUIRE_T8:
306 case MXT_TOUCH_MULTI_T9:
307 case MXT_TOUCH_KEYARRAY_T15:
308 case MXT_TOUCH_PROXIMITY_T23:
309 case MXT_TOUCH_PROXKEY_T52:
310 case MXT_PROCI_GRIPFACE_T20:
311 case MXT_PROCG_NOISE_T22:
312 case MXT_PROCI_ONETOUCH_T24:
313 case MXT_PROCI_TWOTOUCH_T27:
314 case MXT_PROCI_GRIP_T40:
315 case MXT_PROCI_PALM_T41:
316 case MXT_PROCI_TOUCHSUPPRESSION_T42:
317 case MXT_PROCI_STYLUS_T47:
318 case MXT_PROCG_NOISESUPPRESSION_T48:
319 case MXT_SPT_COMMSCONFIG_T18:
320 case MXT_SPT_GPIOPWM_T19:
321 case MXT_SPT_SELFTEST_T25:
322 case MXT_SPT_CTECONFIG_T28:
323 case MXT_SPT_DIGITIZER_T43:
324 case MXT_SPT_CTECONFIG_T46:
325 return true;
326 default:
327 return false;
328 }
329 }
330
331 static void mxt_dump_message(struct device *dev,
332 struct mxt_message *message)
333 {
334 dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
335 message->reportid, 7, message->message);
336 }
337
338 static int mxt_check_bootloader(struct i2c_client *client,
339 unsigned int state)
340 {
341 u8 val;
342
343 recheck:
344 if (i2c_master_recv(client, &val, 1) != 1) {
345 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
346 return -EIO;
347 }
348
349 switch (state) {
350 case MXT_WAITING_BOOTLOAD_CMD:
351 case MXT_WAITING_FRAME_DATA:
352 val &= ~MXT_BOOT_STATUS_MASK;
353 break;
354 case MXT_FRAME_CRC_PASS:
355 if (val == MXT_FRAME_CRC_CHECK)
356 goto recheck;
357 break;
358 default:
359 return -EINVAL;
360 }
361
362 if (val != state) {
363 dev_err(&client->dev, "Unvalid bootloader mode state\n");
364 return -EINVAL;
365 }
366
367 return 0;
368 }
369
370 static int mxt_unlock_bootloader(struct i2c_client *client)
371 {
372 u8 buf[2];
373
374 buf[0] = MXT_UNLOCK_CMD_LSB;
375 buf[1] = MXT_UNLOCK_CMD_MSB;
376
377 if (i2c_master_send(client, buf, 2) != 2) {
378 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
379 return -EIO;
380 }
381
382 return 0;
383 }
384
385 static int mxt_fw_write(struct i2c_client *client,
386 const u8 *data, unsigned int frame_size)
387 {
388 if (i2c_master_send(client, data, frame_size) != frame_size) {
389 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
390 return -EIO;
391 }
392
393 return 0;
394 }
395
396 static int __mxt_read_reg(struct i2c_client *client,
397 u16 reg, u16 len, void *val)
398 {
399 struct i2c_msg xfer[2];
400 u8 buf[2];
401 int ret;
402
403 buf[0] = reg & 0xff;
404 buf[1] = (reg >> 8) & 0xff;
405
406 /* Write register */
407 xfer[0].addr = client->addr;
408 xfer[0].flags = 0;
409 xfer[0].len = 2;
410 xfer[0].buf = buf;
411
412 /* Read data */
413 xfer[1].addr = client->addr;
414 xfer[1].flags = I2C_M_RD;
415 xfer[1].len = len;
416 xfer[1].buf = val;
417
418 ret = i2c_transfer(client->adapter, xfer, 2);
419 if (ret == 2) {
420 ret = 0;
421 } else {
422 if (ret >= 0)
423 ret = -EIO;
424 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
425 __func__, ret);
426 }
427
428 return ret;
429 }
430
431 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
432 {
433 return __mxt_read_reg(client, reg, 1, val);
434 }
435
436 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
437 const void *val)
438 {
439 u8 *buf;
440 size_t count;
441 int ret;
442
443 count = len + 2;
444 buf = kmalloc(count, GFP_KERNEL);
445 if (!buf)
446 return -ENOMEM;
447
448 buf[0] = reg & 0xff;
449 buf[1] = (reg >> 8) & 0xff;
450 memcpy(&buf[2], val, len);
451
452 ret = i2c_master_send(client, buf, count);
453 if (ret == count) {
454 ret = 0;
455 } else {
456 if (ret >= 0)
457 ret = -EIO;
458 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
459 __func__, ret);
460 }
461
462 kfree(buf);
463 return ret;
464 }
465
466 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
467 {
468 return __mxt_write_reg(client, reg, 1, &val);
469 }
470
471 static struct mxt_object *
472 mxt_get_object(struct mxt_data *data, u8 type)
473 {
474 struct mxt_object *object;
475 int i;
476
477 for (i = 0; i < data->info.object_num; i++) {
478 object = data->object_table + i;
479 if (object->type == type)
480 return object;
481 }
482
483 dev_err(&data->client->dev, "Invalid object type\n");
484 return NULL;
485 }
486
487 static int mxt_read_message(struct mxt_data *data,
488 struct mxt_message *message)
489 {
490 struct mxt_object *object;
491 u16 reg;
492
493 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
494 if (!object)
495 return -EINVAL;
496
497 reg = object->start_address;
498 return __mxt_read_reg(data->client, reg,
499 sizeof(struct mxt_message), message);
500 }
501
502 static int mxt_write_object(struct mxt_data *data,
503 u8 type, u8 offset, u8 val)
504 {
505 struct mxt_object *object;
506 u16 reg;
507
508 object = mxt_get_object(data, type);
509 if (!object || offset >= object->size + 1)
510 return -EINVAL;
511
512 reg = object->start_address;
513 return mxt_write_reg(data->client, reg + offset, val);
514 }
515
516 static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
517 {
518 struct input_dev *input = data->input_dev;
519 bool button;
520 int i;
521
522 /* Active-low switch */
523 for (i = 0; i < MXT_NUM_GPIO; i++) {
524 if (data->pdata->key_map[i] == KEY_RESERVED)
525 continue;
526 button = !(message->message[0] & MXT_GPIO0_MASK << i);
527 input_report_key(input, data->pdata->key_map[i], button);
528 }
529 }
530
531 static void mxt_input_touchevent(struct mxt_data *data,
532 struct mxt_message *message, int id)
533 {
534 struct device *dev = &data->client->dev;
535 u8 status = message->message[0];
536 struct input_dev *input_dev = data->input_dev;
537 int x;
538 int y;
539 int area;
540 int pressure;
541
542 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
543 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
544 if (data->max_x < 1024)
545 x = x >> 2;
546 if (data->max_y < 1024)
547 y = y >> 2;
548
549 area = message->message[4];
550 pressure = message->message[5];
551
552 dev_dbg(dev,
553 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
554 id,
555 (status & MXT_DETECT) ? 'D' : '.',
556 (status & MXT_PRESS) ? 'P' : '.',
557 (status & MXT_RELEASE) ? 'R' : '.',
558 (status & MXT_MOVE) ? 'M' : '.',
559 (status & MXT_VECTOR) ? 'V' : '.',
560 (status & MXT_AMP) ? 'A' : '.',
561 (status & MXT_SUPPRESS) ? 'S' : '.',
562 (status & MXT_UNGRIP) ? 'U' : '.',
563 x, y, area, pressure);
564
565 input_mt_slot(input_dev, id);
566 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
567 status & MXT_DETECT);
568
569 if (status & MXT_DETECT) {
570 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
571 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
572 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
573 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
574 }
575 }
576
577 static unsigned mxt_extract_T6_csum(const u8 *csum)
578 {
579 return csum[0] | (csum[1] << 8) | (csum[2] << 16);
580 }
581
582 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
583 {
584 u8 id = msg->reportid;
585 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
586 }
587
588 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
589 {
590 struct mxt_data *data = dev_id;
591 struct mxt_message message;
592 const u8 *payload = &message.message[0];
593 struct device *dev = &data->client->dev;
594 u8 reportid;
595 bool update_input = false;
596
597 do {
598 if (mxt_read_message(data, &message)) {
599 dev_err(dev, "Failed to read message\n");
600 goto end;
601 }
602
603 reportid = message.reportid;
604
605 if (reportid == data->T6_reportid) {
606 u8 status = payload[0];
607 unsigned csum = mxt_extract_T6_csum(&payload[1]);
608 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
609 status, csum);
610 } else if (mxt_is_T9_message(data, &message)) {
611 int id = reportid - data->T9_reportid_min;
612 mxt_input_touchevent(data, &message, id);
613 update_input = true;
614 } else if (message.reportid == data->T19_reportid) {
615 mxt_input_button(data, &message);
616 update_input = true;
617 } else {
618 mxt_dump_message(dev, &message);
619 }
620 } while (reportid != 0xff);
621
622 if (update_input) {
623 input_mt_report_pointer_emulation(data->input_dev, false);
624 input_sync(data->input_dev);
625 }
626
627 end:
628 return IRQ_HANDLED;
629 }
630
631 static int mxt_check_reg_init(struct mxt_data *data)
632 {
633 const struct mxt_platform_data *pdata = data->pdata;
634 struct mxt_object *object;
635 struct device *dev = &data->client->dev;
636 int index = 0;
637 int i, size;
638 int ret;
639
640 if (!pdata->config) {
641 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
642 return 0;
643 }
644
645 for (i = 0; i < data->info.object_num; i++) {
646 object = data->object_table + i;
647
648 if (!mxt_object_writable(object->type))
649 continue;
650
651 size = (object->size + 1) * (object->instances + 1);
652 if (index + size > pdata->config_length) {
653 dev_err(dev, "Not enough config data!\n");
654 return -EINVAL;
655 }
656
657 ret = __mxt_write_reg(data->client, object->start_address,
658 size, &pdata->config[index]);
659 if (ret)
660 return ret;
661 index += size;
662 }
663
664 return 0;
665 }
666
667 static int mxt_make_highchg(struct mxt_data *data)
668 {
669 struct device *dev = &data->client->dev;
670 struct mxt_message message;
671 int count = 10;
672 int error;
673
674 /* Read dummy message to make high CHG pin */
675 do {
676 error = mxt_read_message(data, &message);
677 if (error)
678 return error;
679 } while (message.reportid != 0xff && --count);
680
681 if (!count) {
682 dev_err(dev, "CHG pin isn't cleared\n");
683 return -EBUSY;
684 }
685
686 return 0;
687 }
688
689 static void mxt_handle_pdata(struct mxt_data *data)
690 {
691 const struct mxt_platform_data *pdata = data->pdata;
692 u8 voltage;
693
694 /* Set touchscreen lines */
695 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
696 pdata->x_line);
697 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
698 pdata->y_line);
699
700 /* Set touchscreen orient */
701 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
702 pdata->orient);
703
704 /* Set touchscreen burst length */
705 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
706 MXT_TOUCH_BLEN, pdata->blen);
707
708 /* Set touchscreen threshold */
709 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
710 MXT_TOUCH_TCHTHR, pdata->threshold);
711
712 /* Set touchscreen resolution */
713 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
714 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
715 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
716 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
717 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
718 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
719 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
720 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
721
722 /* Set touchscreen voltage */
723 if (pdata->voltage) {
724 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
725 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
726 MXT_VOLTAGE_STEP;
727 voltage = 0xff - voltage + 1;
728 } else
729 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
730 MXT_VOLTAGE_STEP;
731
732 mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
733 MXT_CTE_VOLTAGE, voltage);
734 }
735 }
736
737 static int mxt_get_info(struct mxt_data *data)
738 {
739 struct i2c_client *client = data->client;
740 struct mxt_info *info = &data->info;
741 int error;
742
743 /* Read 7-byte info block starting at address 0 */
744 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
745 if (error)
746 return error;
747
748 return 0;
749 }
750
751 static int mxt_get_object_table(struct mxt_data *data)
752 {
753 struct i2c_client *client = data->client;
754 size_t table_size;
755 int error;
756 int i;
757 u8 reportid;
758
759 table_size = data->info.object_num * sizeof(struct mxt_object);
760 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
761 data->object_table);
762 if (error)
763 return error;
764
765 /* Valid Report IDs start counting from 1 */
766 reportid = 1;
767 for (i = 0; i < data->info.object_num; i++) {
768 struct mxt_object *object = data->object_table + i;
769 u8 min_id, max_id;
770
771 le16_to_cpus(&object->start_address);
772
773 if (object->num_report_ids) {
774 min_id = reportid;
775 reportid += object->num_report_ids *
776 (object->instances + 1);
777 max_id = reportid - 1;
778 } else {
779 min_id = 0;
780 max_id = 0;
781 }
782
783 dev_dbg(&data->client->dev,
784 "Type %2d Start %3d Size %3d Instances %2d ReportIDs %3u : %3u\n",
785 object->type, object->start_address, object->size + 1,
786 object->instances + 1, min_id, max_id);
787
788 switch (object->type) {
789 case MXT_GEN_COMMAND_T6:
790 data->T6_reportid = min_id;
791 break;
792 case MXT_TOUCH_MULTI_T9:
793 data->T9_reportid_min = min_id;
794 data->T9_reportid_max = max_id;
795 break;
796 case MXT_SPT_GPIOPWM_T19:
797 data->T19_reportid = min_id;
798 break;
799 }
800 }
801
802 return 0;
803 }
804
805 static void mxt_free_object_table(struct mxt_data *data)
806 {
807 kfree(data->object_table);
808 data->object_table = NULL;
809 data->T6_reportid = 0;
810 data->T9_reportid_min = 0;
811 data->T9_reportid_max = 0;
812 data->T19_reportid = 0;
813 }
814
815 static int mxt_initialize(struct mxt_data *data)
816 {
817 struct i2c_client *client = data->client;
818 struct mxt_info *info = &data->info;
819 int error;
820 u8 val;
821
822 error = mxt_get_info(data);
823 if (error)
824 return error;
825
826 data->object_table = kcalloc(info->object_num,
827 sizeof(struct mxt_object),
828 GFP_KERNEL);
829 if (!data->object_table) {
830 dev_err(&client->dev, "Failed to allocate memory\n");
831 return -ENOMEM;
832 }
833
834 /* Get object table information */
835 error = mxt_get_object_table(data);
836 if (error)
837 goto err_free_object_table;
838
839 /* Check register init values */
840 error = mxt_check_reg_init(data);
841 if (error)
842 goto err_free_object_table;
843
844 mxt_handle_pdata(data);
845
846 /* Backup to memory */
847 mxt_write_object(data, MXT_GEN_COMMAND_T6,
848 MXT_COMMAND_BACKUPNV,
849 MXT_BACKUP_VALUE);
850 msleep(MXT_BACKUP_TIME);
851
852 /* Soft reset */
853 mxt_write_object(data, MXT_GEN_COMMAND_T6,
854 MXT_COMMAND_RESET, 1);
855 msleep(MXT_RESET_TIME);
856
857 /* Update matrix size at info struct */
858 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
859 if (error)
860 goto err_free_object_table;
861 info->matrix_xsize = val;
862
863 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
864 if (error)
865 goto err_free_object_table;
866 info->matrix_ysize = val;
867
868 dev_info(&client->dev,
869 "Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
870 info->family_id, info->variant_id, info->version >> 4,
871 info->version & 0xf, info->build);
872
873 dev_info(&client->dev,
874 "Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
875 info->matrix_xsize, info->matrix_ysize,
876 info->object_num);
877
878 return 0;
879
880 err_free_object_table:
881 mxt_free_object_table(data);
882 return error;
883 }
884
885 static void mxt_calc_resolution(struct mxt_data *data)
886 {
887 unsigned int max_x = data->pdata->x_size - 1;
888 unsigned int max_y = data->pdata->y_size - 1;
889
890 if (data->pdata->orient & MXT_XY_SWITCH) {
891 data->max_x = max_y;
892 data->max_y = max_x;
893 } else {
894 data->max_x = max_x;
895 data->max_y = max_y;
896 }
897 }
898
899 /* Firmware Version is returned as Major.Minor.Build */
900 static ssize_t mxt_fw_version_show(struct device *dev,
901 struct device_attribute *attr, char *buf)
902 {
903 struct mxt_data *data = dev_get_drvdata(dev);
904 struct mxt_info *info = &data->info;
905 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
906 info->version >> 4, info->version & 0xf, info->build);
907 }
908
909 /* Hardware Version is returned as FamilyID.VariantID */
910 static ssize_t mxt_hw_version_show(struct device *dev,
911 struct device_attribute *attr, char *buf)
912 {
913 struct mxt_data *data = dev_get_drvdata(dev);
914 struct mxt_info *info = &data->info;
915 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
916 info->family_id, info->variant_id);
917 }
918
919 static ssize_t mxt_show_instance(char *buf, int count,
920 struct mxt_object *object, int instance,
921 const u8 *val)
922 {
923 int i;
924
925 if (object->instances > 0)
926 count += scnprintf(buf + count, PAGE_SIZE - count,
927 "Instance %u\n", instance);
928
929 for (i = 0; i < object->size + 1; i++)
930 count += scnprintf(buf + count, PAGE_SIZE - count,
931 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
932 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
933
934 return count;
935 }
936
937 static ssize_t mxt_object_show(struct device *dev,
938 struct device_attribute *attr, char *buf)
939 {
940 struct mxt_data *data = dev_get_drvdata(dev);
941 struct mxt_object *object;
942 int count = 0;
943 int i, j;
944 int error;
945 u8 *obuf;
946
947 /* Pre-allocate buffer large enough to hold max sized object. */
948 obuf = kmalloc(256, GFP_KERNEL);
949 if (!obuf)
950 return -ENOMEM;
951
952 error = 0;
953 for (i = 0; i < data->info.object_num; i++) {
954 object = data->object_table + i;
955
956 if (!mxt_object_readable(object->type))
957 continue;
958
959 count += scnprintf(buf + count, PAGE_SIZE - count,
960 "T%u:\n", object->type);
961
962 for (j = 0; j < object->instances + 1; j++) {
963 u16 size = object->size + 1;
964 u16 addr = object->start_address + j * size;
965
966 error = __mxt_read_reg(data->client, addr, size, obuf);
967 if (error)
968 goto done;
969
970 count = mxt_show_instance(buf, count, object, j, obuf);
971 }
972 }
973
974 done:
975 kfree(obuf);
976 return error ?: count;
977 }
978
979 static int mxt_load_fw(struct device *dev, const char *fn)
980 {
981 struct mxt_data *data = dev_get_drvdata(dev);
982 struct i2c_client *client = data->client;
983 const struct firmware *fw = NULL;
984 unsigned int frame_size;
985 unsigned int pos = 0;
986 int ret;
987
988 ret = request_firmware(&fw, fn, dev);
989 if (ret) {
990 dev_err(dev, "Unable to open firmware %s\n", fn);
991 return ret;
992 }
993
994 /* Change to the bootloader mode */
995 mxt_write_object(data, MXT_GEN_COMMAND_T6,
996 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
997 msleep(MXT_RESET_TIME);
998
999 /* Change to slave address of bootloader */
1000 if (client->addr == MXT_APP_LOW)
1001 client->addr = MXT_BOOT_LOW;
1002 else
1003 client->addr = MXT_BOOT_HIGH;
1004
1005 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
1006 if (ret)
1007 goto out;
1008
1009 /* Unlock bootloader */
1010 mxt_unlock_bootloader(client);
1011
1012 while (pos < fw->size) {
1013 ret = mxt_check_bootloader(client,
1014 MXT_WAITING_FRAME_DATA);
1015 if (ret)
1016 goto out;
1017
1018 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
1019
1020 /* We should add 2 at frame size as the the firmware data is not
1021 * included the CRC bytes.
1022 */
1023 frame_size += 2;
1024
1025 /* Write one frame to device */
1026 mxt_fw_write(client, fw->data + pos, frame_size);
1027
1028 ret = mxt_check_bootloader(client,
1029 MXT_FRAME_CRC_PASS);
1030 if (ret)
1031 goto out;
1032
1033 pos += frame_size;
1034
1035 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
1036 }
1037
1038 out:
1039 release_firmware(fw);
1040
1041 /* Change to slave address of application */
1042 if (client->addr == MXT_BOOT_LOW)
1043 client->addr = MXT_APP_LOW;
1044 else
1045 client->addr = MXT_APP_HIGH;
1046
1047 return ret;
1048 }
1049
1050 static ssize_t mxt_update_fw_store(struct device *dev,
1051 struct device_attribute *attr,
1052 const char *buf, size_t count)
1053 {
1054 struct mxt_data *data = dev_get_drvdata(dev);
1055 int error;
1056
1057 disable_irq(data->irq);
1058
1059 error = mxt_load_fw(dev, MXT_FW_NAME);
1060 if (error) {
1061 dev_err(dev, "The firmware update failed(%d)\n", error);
1062 count = error;
1063 } else {
1064 dev_dbg(dev, "The firmware update succeeded\n");
1065
1066 /* Wait for reset */
1067 msleep(MXT_FWRESET_TIME);
1068
1069 mxt_free_object_table(data);
1070
1071 mxt_initialize(data);
1072 }
1073
1074 enable_irq(data->irq);
1075
1076 error = mxt_make_highchg(data);
1077 if (error)
1078 return error;
1079
1080 return count;
1081 }
1082
1083 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1084 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1085 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1086 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1087
1088 static struct attribute *mxt_attrs[] = {
1089 &dev_attr_fw_version.attr,
1090 &dev_attr_hw_version.attr,
1091 &dev_attr_object.attr,
1092 &dev_attr_update_fw.attr,
1093 NULL
1094 };
1095
1096 static const struct attribute_group mxt_attr_group = {
1097 .attrs = mxt_attrs,
1098 };
1099
1100 static void mxt_start(struct mxt_data *data)
1101 {
1102 /* Touch enable */
1103 mxt_write_object(data,
1104 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1105 }
1106
1107 static void mxt_stop(struct mxt_data *data)
1108 {
1109 /* Touch disable */
1110 mxt_write_object(data,
1111 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1112 }
1113
1114 static int mxt_input_open(struct input_dev *dev)
1115 {
1116 struct mxt_data *data = input_get_drvdata(dev);
1117
1118 mxt_start(data);
1119
1120 return 0;
1121 }
1122
1123 static void mxt_input_close(struct input_dev *dev)
1124 {
1125 struct mxt_data *data = input_get_drvdata(dev);
1126
1127 mxt_stop(data);
1128 }
1129
1130 static int mxt_probe(struct i2c_client *client,
1131 const struct i2c_device_id *id)
1132 {
1133 const struct mxt_platform_data *pdata = client->dev.platform_data;
1134 struct mxt_data *data;
1135 struct input_dev *input_dev;
1136 int error;
1137 unsigned int num_mt_slots;
1138
1139 if (!pdata)
1140 return -EINVAL;
1141
1142 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1143 input_dev = input_allocate_device();
1144 if (!data || !input_dev) {
1145 dev_err(&client->dev, "Failed to allocate memory\n");
1146 error = -ENOMEM;
1147 goto err_free_mem;
1148 }
1149
1150 data->is_tp = pdata && pdata->is_tp;
1151
1152 input_dev->name = (data->is_tp) ? "Atmel maXTouch Touchpad" :
1153 "Atmel maXTouch Touchscreen";
1154 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1155 client->adapter->nr, client->addr);
1156
1157 input_dev->phys = data->phys;
1158
1159 input_dev->id.bustype = BUS_I2C;
1160 input_dev->dev.parent = &client->dev;
1161 input_dev->open = mxt_input_open;
1162 input_dev->close = mxt_input_close;
1163
1164 data->client = client;
1165 data->input_dev = input_dev;
1166 data->pdata = pdata;
1167 data->irq = client->irq;
1168
1169 mxt_calc_resolution(data);
1170
1171 error = mxt_initialize(data);
1172 if (error)
1173 goto err_free_mem;
1174
1175 __set_bit(EV_ABS, input_dev->evbit);
1176 __set_bit(EV_KEY, input_dev->evbit);
1177 __set_bit(BTN_TOUCH, input_dev->keybit);
1178
1179 if (data->is_tp) {
1180 int i;
1181 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
1182 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1183
1184 for (i = 0; i < MXT_NUM_GPIO; i++)
1185 if (pdata->key_map[i] != KEY_RESERVED)
1186 __set_bit(pdata->key_map[i], input_dev->keybit);
1187
1188 __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
1189 __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
1190 __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
1191 __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
1192 __set_bit(BTN_TOOL_QUINTTAP, input_dev->keybit);
1193
1194 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1195 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1196 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1197 MXT_PIXELS_PER_MM);
1198 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1199 MXT_PIXELS_PER_MM);
1200 }
1201
1202 /* For single touch */
1203 input_set_abs_params(input_dev, ABS_X,
1204 0, data->max_x, 0, 0);
1205 input_set_abs_params(input_dev, ABS_Y,
1206 0, data->max_y, 0, 0);
1207 input_set_abs_params(input_dev, ABS_PRESSURE,
1208 0, 255, 0, 0);
1209
1210 /* For multi touch */
1211 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1212 error = input_mt_init_slots(input_dev, num_mt_slots, 0);
1213 if (error)
1214 goto err_free_object;
1215 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1216 0, MXT_MAX_AREA, 0, 0);
1217 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1218 0, data->max_x, 0, 0);
1219 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1220 0, data->max_y, 0, 0);
1221 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1222 0, 255, 0, 0);
1223
1224 input_set_drvdata(input_dev, data);
1225 i2c_set_clientdata(client, data);
1226
1227 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1228 pdata->irqflags | IRQF_ONESHOT,
1229 client->name, data);
1230 if (error) {
1231 dev_err(&client->dev, "Failed to register interrupt\n");
1232 goto err_free_object;
1233 }
1234
1235 error = mxt_make_highchg(data);
1236 if (error)
1237 goto err_free_irq;
1238
1239 error = input_register_device(input_dev);
1240 if (error)
1241 goto err_free_irq;
1242
1243 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1244 if (error)
1245 goto err_unregister_device;
1246
1247 return 0;
1248
1249 err_unregister_device:
1250 input_unregister_device(input_dev);
1251 input_dev = NULL;
1252 err_free_irq:
1253 free_irq(client->irq, data);
1254 err_free_object:
1255 kfree(data->object_table);
1256 err_free_mem:
1257 input_free_device(input_dev);
1258 kfree(data);
1259 return error;
1260 }
1261
1262 static int mxt_remove(struct i2c_client *client)
1263 {
1264 struct mxt_data *data = i2c_get_clientdata(client);
1265
1266 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1267 free_irq(data->irq, data);
1268 input_unregister_device(data->input_dev);
1269 kfree(data->object_table);
1270 kfree(data);
1271
1272 return 0;
1273 }
1274
1275 #ifdef CONFIG_PM_SLEEP
1276 static int mxt_suspend(struct device *dev)
1277 {
1278 struct i2c_client *client = to_i2c_client(dev);
1279 struct mxt_data *data = i2c_get_clientdata(client);
1280 struct input_dev *input_dev = data->input_dev;
1281
1282 mutex_lock(&input_dev->mutex);
1283
1284 if (input_dev->users)
1285 mxt_stop(data);
1286
1287 mutex_unlock(&input_dev->mutex);
1288
1289 return 0;
1290 }
1291
1292 static int mxt_resume(struct device *dev)
1293 {
1294 struct i2c_client *client = to_i2c_client(dev);
1295 struct mxt_data *data = i2c_get_clientdata(client);
1296 struct input_dev *input_dev = data->input_dev;
1297
1298 /* Soft reset */
1299 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1300 MXT_COMMAND_RESET, 1);
1301
1302 msleep(MXT_RESET_TIME);
1303
1304 mutex_lock(&input_dev->mutex);
1305
1306 if (input_dev->users)
1307 mxt_start(data);
1308
1309 mutex_unlock(&input_dev->mutex);
1310
1311 return 0;
1312 }
1313 #endif
1314
1315 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1316
1317 static const struct i2c_device_id mxt_id[] = {
1318 { "qt602240_ts", 0 },
1319 { "atmel_mxt_ts", 0 },
1320 { "atmel_mxt_tp", 0 },
1321 { "mXT224", 0 },
1322 { }
1323 };
1324 MODULE_DEVICE_TABLE(i2c, mxt_id);
1325
1326 static struct i2c_driver mxt_driver = {
1327 .driver = {
1328 .name = "atmel_mxt_ts",
1329 .owner = THIS_MODULE,
1330 .pm = &mxt_pm_ops,
1331 },
1332 .probe = mxt_probe,
1333 .remove = mxt_remove,
1334 .id_table = mxt_id,
1335 };
1336
1337 module_i2c_driver(mxt_driver);
1338
1339 /* Module information */
1340 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1341 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1342 MODULE_LICENSE("GPL");
Linux with added FPC-III support