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Input: atmel_mxt_ts - improve T19 GPIO keys handling
[deliverable/linux.git] / drivers / input / touchscreen / atmel_mxt_ts.c
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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/delay.h>
16#include <linux/firmware.h>
17#include <linux/i2c.h>
18#include <linux/i2c/atmel_mxt_ts.h>
19#include <linux/input/mt.h>
20#include <linux/interrupt.h>
21#include <linux/slab.h>
22
23/* Version */
24#define MXT_VER_20 20
25#define MXT_VER_21 21
26#define MXT_VER_22 22
27
28/* Slave addresses */
29#define MXT_APP_LOW 0x4a
30#define MXT_APP_HIGH 0x4b
31#define MXT_BOOT_LOW 0x24
32#define MXT_BOOT_HIGH 0x25
33
34/* Firmware */
35#define MXT_FW_NAME "maxtouch.fw"
36
37/* Registers */
38#define MXT_INFO 0x00
39#define MXT_FAMILY_ID 0x00
40#define MXT_VARIANT_ID 0x01
41#define MXT_VERSION 0x02
42#define MXT_BUILD 0x03
43#define MXT_MATRIX_X_SIZE 0x04
44#define MXT_MATRIX_Y_SIZE 0x05
45#define MXT_OBJECT_NUM 0x06
46#define MXT_OBJECT_START 0x07
47
48#define MXT_OBJECT_SIZE 6
49
50/* Object types */
51#define MXT_DEBUG_DIAGNOSTIC_T37 37
52#define MXT_GEN_MESSAGE_T5 5
53#define MXT_GEN_COMMAND_T6 6
54#define MXT_GEN_POWER_T7 7
55#define MXT_GEN_ACQUIRE_T8 8
56#define MXT_GEN_DATASOURCE_T53 53
57#define MXT_TOUCH_MULTI_T9 9
58#define MXT_TOUCH_KEYARRAY_T15 15
59#define MXT_TOUCH_PROXIMITY_T23 23
60#define MXT_TOUCH_PROXKEY_T52 52
61#define MXT_PROCI_GRIPFACE_T20 20
62#define MXT_PROCG_NOISE_T22 22
63#define MXT_PROCI_ONETOUCH_T24 24
64#define MXT_PROCI_TWOTOUCH_T27 27
65#define MXT_PROCI_GRIP_T40 40
66#define MXT_PROCI_PALM_T41 41
67#define MXT_PROCI_TOUCHSUPPRESSION_T42 42
68#define MXT_PROCI_STYLUS_T47 47
69#define MXT_PROCG_NOISESUPPRESSION_T48 48
70#define MXT_SPT_COMMSCONFIG_T18 18
71#define MXT_SPT_GPIOPWM_T19 19
72#define MXT_SPT_SELFTEST_T25 25
73#define MXT_SPT_CTECONFIG_T28 28
74#define MXT_SPT_USERDATA_T38 38
75#define MXT_SPT_DIGITIZER_T43 43
76#define MXT_SPT_MESSAGECOUNT_T44 44
77#define MXT_SPT_CTECONFIG_T46 46
78
79/* MXT_GEN_COMMAND_T6 field */
80#define MXT_COMMAND_RESET 0
81#define MXT_COMMAND_BACKUPNV 1
82#define MXT_COMMAND_CALIBRATE 2
83#define MXT_COMMAND_REPORTALL 3
84#define MXT_COMMAND_DIAGNOSTIC 5
85
86/* MXT_GEN_POWER_T7 field */
87#define MXT_POWER_IDLEACQINT 0
88#define MXT_POWER_ACTVACQINT 1
89#define MXT_POWER_ACTV2IDLETO 2
90
91/* MXT_GEN_ACQUIRE_T8 field */
92#define MXT_ACQUIRE_CHRGTIME 0
93#define MXT_ACQUIRE_TCHDRIFT 2
94#define MXT_ACQUIRE_DRIFTST 3
95#define MXT_ACQUIRE_TCHAUTOCAL 4
96#define MXT_ACQUIRE_SYNC 5
97#define MXT_ACQUIRE_ATCHCALST 6
98#define MXT_ACQUIRE_ATCHCALSTHR 7
99
100/* MXT_TOUCH_MULTI_T9 field */
101#define MXT_TOUCH_CTRL 0
102#define MXT_TOUCH_XORIGIN 1
103#define MXT_TOUCH_YORIGIN 2
104#define MXT_TOUCH_XSIZE 3
105#define MXT_TOUCH_YSIZE 4
106#define MXT_TOUCH_BLEN 6
107#define MXT_TOUCH_TCHTHR 7
108#define MXT_TOUCH_TCHDI 8
109#define MXT_TOUCH_ORIENT 9
110#define MXT_TOUCH_MOVHYSTI 11
111#define MXT_TOUCH_MOVHYSTN 12
112#define MXT_TOUCH_NUMTOUCH 14
113#define MXT_TOUCH_MRGHYST 15
114#define MXT_TOUCH_MRGTHR 16
115#define MXT_TOUCH_AMPHYST 17
116#define MXT_TOUCH_XRANGE_LSB 18
117#define MXT_TOUCH_XRANGE_MSB 19
118#define MXT_TOUCH_YRANGE_LSB 20
119#define MXT_TOUCH_YRANGE_MSB 21
120#define MXT_TOUCH_XLOCLIP 22
121#define MXT_TOUCH_XHICLIP 23
122#define MXT_TOUCH_YLOCLIP 24
123#define MXT_TOUCH_YHICLIP 25
124#define MXT_TOUCH_XEDGECTRL 26
125#define MXT_TOUCH_XEDGEDIST 27
126#define MXT_TOUCH_YEDGECTRL 28
127#define MXT_TOUCH_YEDGEDIST 29
128#define MXT_TOUCH_JUMPLIMIT 30
129
130/* MXT_PROCI_GRIPFACE_T20 field */
131#define MXT_GRIPFACE_CTRL 0
132#define MXT_GRIPFACE_XLOGRIP 1
133#define MXT_GRIPFACE_XHIGRIP 2
134#define MXT_GRIPFACE_YLOGRIP 3
135#define MXT_GRIPFACE_YHIGRIP 4
136#define MXT_GRIPFACE_MAXTCHS 5
137#define MXT_GRIPFACE_SZTHR1 7
138#define MXT_GRIPFACE_SZTHR2 8
139#define MXT_GRIPFACE_SHPTHR1 9
140#define MXT_GRIPFACE_SHPTHR2 10
141#define MXT_GRIPFACE_SUPEXTTO 11
142
143/* MXT_PROCI_NOISE field */
144#define MXT_NOISE_CTRL 0
145#define MXT_NOISE_OUTFLEN 1
146#define MXT_NOISE_GCAFUL_LSB 3
147#define MXT_NOISE_GCAFUL_MSB 4
148#define MXT_NOISE_GCAFLL_LSB 5
149#define MXT_NOISE_GCAFLL_MSB 6
150#define MXT_NOISE_ACTVGCAFVALID 7
151#define MXT_NOISE_NOISETHR 8
152#define MXT_NOISE_FREQHOPSCALE 10
153#define MXT_NOISE_FREQ0 11
154#define MXT_NOISE_FREQ1 12
155#define MXT_NOISE_FREQ2 13
156#define MXT_NOISE_FREQ3 14
157#define MXT_NOISE_FREQ4 15
158#define MXT_NOISE_IDLEGCAFVALID 16
159
160/* MXT_SPT_COMMSCONFIG_T18 */
161#define MXT_COMMS_CTRL 0
162#define MXT_COMMS_CMD 1
163
164/* MXT_SPT_CTECONFIG_T28 field */
165#define MXT_CTE_CTRL 0
166#define MXT_CTE_CMD 1
167#define MXT_CTE_MODE 2
168#define MXT_CTE_IDLEGCAFDEPTH 3
169#define MXT_CTE_ACTVGCAFDEPTH 4
170#define MXT_CTE_VOLTAGE 5
171
172#define MXT_VOLTAGE_DEFAULT 2700000
173#define MXT_VOLTAGE_STEP 10000
174
175/* Define for MXT_GEN_COMMAND_T6 */
176#define MXT_BOOT_VALUE 0xa5
177#define MXT_BACKUP_VALUE 0x55
178#define MXT_BACKUP_TIME 50 /* msec */
179#define MXT_RESET_TIME 200 /* msec */
180
181#define MXT_FWRESET_TIME 175 /* msec */
182
183/* Command to unlock bootloader */
184#define MXT_UNLOCK_CMD_MSB 0xaa
185#define MXT_UNLOCK_CMD_LSB 0xdc
186
187/* Bootloader mode status */
188#define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
189#define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
190#define MXT_FRAME_CRC_CHECK 0x02
191#define MXT_FRAME_CRC_FAIL 0x03
192#define MXT_FRAME_CRC_PASS 0x04
193#define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
194#define MXT_BOOT_STATUS_MASK 0x3f
195
196/* Touch status */
197#define MXT_UNGRIP (1 << 0)
198#define MXT_SUPPRESS (1 << 1)
199#define MXT_AMP (1 << 2)
200#define MXT_VECTOR (1 << 3)
201#define MXT_MOVE (1 << 4)
202#define MXT_RELEASE (1 << 5)
203#define MXT_PRESS (1 << 6)
204#define MXT_DETECT (1 << 7)
205
206/* Touch orient bits */
207#define MXT_XY_SWITCH (1 << 0)
208#define MXT_X_INVERT (1 << 1)
209#define MXT_Y_INVERT (1 << 2)
210
211/* Touchscreen absolute values */
212#define MXT_MAX_AREA 0xff
213
214#define MXT_PIXELS_PER_MM 20
215
216struct mxt_info {
217 u8 family_id;
218 u8 variant_id;
219 u8 version;
220 u8 build;
221 u8 matrix_xsize;
222 u8 matrix_ysize;
223 u8 object_num;
224};
225
226struct mxt_object {
227 u8 type;
228 u16 start_address;
229 u8 size; /* Size of each instance - 1 */
230 u8 instances; /* Number of instances - 1 */
231 u8 num_report_ids;
232} __packed;
233
234struct mxt_message {
235 u8 reportid;
236 u8 message[7];
237};
238
239/* Each client has this additional data */
240struct mxt_data {
241 struct i2c_client *client;
242 struct input_dev *input_dev;
243 char phys[64]; /* device physical location */
244 const struct mxt_platform_data *pdata;
245 struct mxt_object *object_table;
246 struct mxt_info info;
247
248 unsigned int irq;
249 unsigned int max_x;
250 unsigned int max_y;
251
252 /* Cached parameters from object table */
253 u8 T6_reportid;
254 u8 T9_reportid_min;
255 u8 T9_reportid_max;
256 u8 T19_reportid;
257};
258
259static bool mxt_object_readable(unsigned int type)
260{
261 switch (type) {
262 case MXT_GEN_COMMAND_T6:
263 case MXT_GEN_POWER_T7:
264 case MXT_GEN_ACQUIRE_T8:
265 case MXT_GEN_DATASOURCE_T53:
266 case MXT_TOUCH_MULTI_T9:
267 case MXT_TOUCH_KEYARRAY_T15:
268 case MXT_TOUCH_PROXIMITY_T23:
269 case MXT_TOUCH_PROXKEY_T52:
270 case MXT_PROCI_GRIPFACE_T20:
271 case MXT_PROCG_NOISE_T22:
272 case MXT_PROCI_ONETOUCH_T24:
273 case MXT_PROCI_TWOTOUCH_T27:
274 case MXT_PROCI_GRIP_T40:
275 case MXT_PROCI_PALM_T41:
276 case MXT_PROCI_TOUCHSUPPRESSION_T42:
277 case MXT_PROCI_STYLUS_T47:
278 case MXT_PROCG_NOISESUPPRESSION_T48:
279 case MXT_SPT_COMMSCONFIG_T18:
280 case MXT_SPT_GPIOPWM_T19:
281 case MXT_SPT_SELFTEST_T25:
282 case MXT_SPT_CTECONFIG_T28:
283 case MXT_SPT_USERDATA_T38:
284 case MXT_SPT_DIGITIZER_T43:
285 case MXT_SPT_CTECONFIG_T46:
286 return true;
287 default:
288 return false;
289 }
290}
291
292static bool mxt_object_writable(unsigned int type)
293{
294 switch (type) {
295 case MXT_GEN_COMMAND_T6:
296 case MXT_GEN_POWER_T7:
297 case MXT_GEN_ACQUIRE_T8:
298 case MXT_TOUCH_MULTI_T9:
299 case MXT_TOUCH_KEYARRAY_T15:
300 case MXT_TOUCH_PROXIMITY_T23:
301 case MXT_TOUCH_PROXKEY_T52:
302 case MXT_PROCI_GRIPFACE_T20:
303 case MXT_PROCG_NOISE_T22:
304 case MXT_PROCI_ONETOUCH_T24:
305 case MXT_PROCI_TWOTOUCH_T27:
306 case MXT_PROCI_GRIP_T40:
307 case MXT_PROCI_PALM_T41:
308 case MXT_PROCI_TOUCHSUPPRESSION_T42:
309 case MXT_PROCI_STYLUS_T47:
310 case MXT_PROCG_NOISESUPPRESSION_T48:
311 case MXT_SPT_COMMSCONFIG_T18:
312 case MXT_SPT_GPIOPWM_T19:
313 case MXT_SPT_SELFTEST_T25:
314 case MXT_SPT_CTECONFIG_T28:
315 case MXT_SPT_DIGITIZER_T43:
316 case MXT_SPT_CTECONFIG_T46:
317 return true;
318 default:
319 return false;
320 }
321}
322
323static void mxt_dump_message(struct device *dev,
324 struct mxt_message *message)
325{
326 dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
327 message->reportid, 7, message->message);
328}
329
330static int mxt_check_bootloader(struct i2c_client *client,
331 unsigned int state)
332{
333 u8 val;
334
335recheck:
336 if (i2c_master_recv(client, &val, 1) != 1) {
337 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
338 return -EIO;
339 }
340
341 switch (state) {
342 case MXT_WAITING_BOOTLOAD_CMD:
343 case MXT_WAITING_FRAME_DATA:
344 val &= ~MXT_BOOT_STATUS_MASK;
345 break;
346 case MXT_FRAME_CRC_PASS:
347 if (val == MXT_FRAME_CRC_CHECK)
348 goto recheck;
349 break;
350 default:
351 return -EINVAL;
352 }
353
354 if (val != state) {
355 dev_err(&client->dev, "Unvalid bootloader mode state\n");
356 return -EINVAL;
357 }
358
359 return 0;
360}
361
362static int mxt_unlock_bootloader(struct i2c_client *client)
363{
364 u8 buf[2];
365
366 buf[0] = MXT_UNLOCK_CMD_LSB;
367 buf[1] = MXT_UNLOCK_CMD_MSB;
368
369 if (i2c_master_send(client, buf, 2) != 2) {
370 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
371 return -EIO;
372 }
373
374 return 0;
375}
376
377static int mxt_fw_write(struct i2c_client *client,
378 const u8 *data, unsigned int frame_size)
379{
380 if (i2c_master_send(client, data, frame_size) != frame_size) {
381 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
382 return -EIO;
383 }
384
385 return 0;
386}
387
388static int __mxt_read_reg(struct i2c_client *client,
389 u16 reg, u16 len, void *val)
390{
391 struct i2c_msg xfer[2];
392 u8 buf[2];
393 int ret;
394
395 buf[0] = reg & 0xff;
396 buf[1] = (reg >> 8) & 0xff;
397
398 /* Write register */
399 xfer[0].addr = client->addr;
400 xfer[0].flags = 0;
401 xfer[0].len = 2;
402 xfer[0].buf = buf;
403
404 /* Read data */
405 xfer[1].addr = client->addr;
406 xfer[1].flags = I2C_M_RD;
407 xfer[1].len = len;
408 xfer[1].buf = val;
409
410 ret = i2c_transfer(client->adapter, xfer, 2);
411 if (ret == 2) {
412 ret = 0;
413 } else {
414 if (ret >= 0)
415 ret = -EIO;
416 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
417 __func__, ret);
418 }
419
420 return ret;
421}
422
423static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
424{
425 return __mxt_read_reg(client, reg, 1, val);
426}
427
428static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
429 const void *val)
430{
431 u8 *buf;
432 size_t count;
433 int ret;
434
435 count = len + 2;
436 buf = kmalloc(count, GFP_KERNEL);
437 if (!buf)
438 return -ENOMEM;
439
440 buf[0] = reg & 0xff;
441 buf[1] = (reg >> 8) & 0xff;
442 memcpy(&buf[2], val, len);
443
444 ret = i2c_master_send(client, buf, count);
445 if (ret == count) {
446 ret = 0;
447 } else {
448 if (ret >= 0)
449 ret = -EIO;
450 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
451 __func__, ret);
452 }
453
454 kfree(buf);
455 return ret;
456}
457
458static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
459{
460 return __mxt_write_reg(client, reg, 1, &val);
461}
462
463static struct mxt_object *
464mxt_get_object(struct mxt_data *data, u8 type)
465{
466 struct mxt_object *object;
467 int i;
468
469 for (i = 0; i < data->info.object_num; i++) {
470 object = data->object_table + i;
471 if (object->type == type)
472 return object;
473 }
474
475 dev_err(&data->client->dev, "Invalid object type\n");
476 return NULL;
477}
478
479static int mxt_read_message(struct mxt_data *data,
480 struct mxt_message *message)
481{
482 struct mxt_object *object;
483 u16 reg;
484
485 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
486 if (!object)
487 return -EINVAL;
488
489 reg = object->start_address;
490 return __mxt_read_reg(data->client, reg,
491 sizeof(struct mxt_message), message);
492}
493
494static int mxt_write_object(struct mxt_data *data,
495 u8 type, u8 offset, u8 val)
496{
497 struct mxt_object *object;
498 u16 reg;
499
500 object = mxt_get_object(data, type);
501 if (!object || offset >= object->size + 1)
502 return -EINVAL;
503
504 reg = object->start_address;
505 return mxt_write_reg(data->client, reg + offset, val);
506}
507
508static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
509{
510 struct input_dev *input = data->input_dev;
511 const struct mxt_platform_data *pdata = data->pdata;
512 bool button;
513 int i;
514
515 /* Active-low switch */
516 for (i = 0; i < pdata->t19_num_keys; i++) {
517 if (pdata->t19_keymap[i] == KEY_RESERVED)
518 continue;
519 button = !(message->message[0] & (1 << i));
520 input_report_key(input, pdata->t19_keymap[i], button);
521 }
522}
523
524static void mxt_input_touchevent(struct mxt_data *data,
525 struct mxt_message *message, int id)
526{
527 struct device *dev = &data->client->dev;
528 u8 status = message->message[0];
529 struct input_dev *input_dev = data->input_dev;
530 int x;
531 int y;
532 int area;
533 int pressure;
534
535 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
536 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
537 if (data->max_x < 1024)
538 x = x >> 2;
539 if (data->max_y < 1024)
540 y = y >> 2;
541
542 area = message->message[4];
543 pressure = message->message[5];
544
545 dev_dbg(dev,
546 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
547 id,
548 (status & MXT_DETECT) ? 'D' : '.',
549 (status & MXT_PRESS) ? 'P' : '.',
550 (status & MXT_RELEASE) ? 'R' : '.',
551 (status & MXT_MOVE) ? 'M' : '.',
552 (status & MXT_VECTOR) ? 'V' : '.',
553 (status & MXT_AMP) ? 'A' : '.',
554 (status & MXT_SUPPRESS) ? 'S' : '.',
555 (status & MXT_UNGRIP) ? 'U' : '.',
556 x, y, area, pressure);
557
558 input_mt_slot(input_dev, id);
559 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
560 status & MXT_DETECT);
561
562 if (status & MXT_DETECT) {
563 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
564 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
565 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
566 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
567 }
568}
569
570static unsigned mxt_extract_T6_csum(const u8 *csum)
571{
572 return csum[0] | (csum[1] << 8) | (csum[2] << 16);
573}
574
575static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
576{
577 u8 id = msg->reportid;
578 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
579}
580
581static irqreturn_t mxt_interrupt(int irq, void *dev_id)
582{
583 struct mxt_data *data = dev_id;
584 struct mxt_message message;
585 const u8 *payload = &message.message[0];
586 struct device *dev = &data->client->dev;
587 u8 reportid;
588 bool update_input = false;
589
590 do {
591 if (mxt_read_message(data, &message)) {
592 dev_err(dev, "Failed to read message\n");
593 goto end;
594 }
595
596 reportid = message.reportid;
597
598 if (reportid == data->T6_reportid) {
599 u8 status = payload[0];
600 unsigned csum = mxt_extract_T6_csum(&payload[1]);
601 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
602 status, csum);
603 } else if (mxt_is_T9_message(data, &message)) {
604 int id = reportid - data->T9_reportid_min;
605 mxt_input_touchevent(data, &message, id);
606 update_input = true;
607 } else if (message.reportid == data->T19_reportid) {
608 mxt_input_button(data, &message);
609 update_input = true;
610 } else {
611 mxt_dump_message(dev, &message);
612 }
613 } while (reportid != 0xff);
614
615 if (update_input) {
616 input_mt_report_pointer_emulation(data->input_dev, false);
617 input_sync(data->input_dev);
618 }
619
620end:
621 return IRQ_HANDLED;
622}
623
624static int mxt_check_reg_init(struct mxt_data *data)
625{
626 const struct mxt_platform_data *pdata = data->pdata;
627 struct mxt_object *object;
628 struct device *dev = &data->client->dev;
629 int index = 0;
630 int i, size;
631 int ret;
632
633 if (!pdata->config) {
634 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
635 return 0;
636 }
637
638 for (i = 0; i < data->info.object_num; i++) {
639 object = data->object_table + i;
640
641 if (!mxt_object_writable(object->type))
642 continue;
643
644 size = (object->size + 1) * (object->instances + 1);
645 if (index + size > pdata->config_length) {
646 dev_err(dev, "Not enough config data!\n");
647 return -EINVAL;
648 }
649
650 ret = __mxt_write_reg(data->client, object->start_address,
651 size, &pdata->config[index]);
652 if (ret)
653 return ret;
654 index += size;
655 }
656
657 return 0;
658}
659
660static int mxt_make_highchg(struct mxt_data *data)
661{
662 struct device *dev = &data->client->dev;
663 struct mxt_message message;
664 int count = 10;
665 int error;
666
667 /* Read dummy message to make high CHG pin */
668 do {
669 error = mxt_read_message(data, &message);
670 if (error)
671 return error;
672 } while (message.reportid != 0xff && --count);
673
674 if (!count) {
675 dev_err(dev, "CHG pin isn't cleared\n");
676 return -EBUSY;
677 }
678
679 return 0;
680}
681
682static int mxt_get_info(struct mxt_data *data)
683{
684 struct i2c_client *client = data->client;
685 struct mxt_info *info = &data->info;
686 int error;
687
688 /* Read 7-byte info block starting at address 0 */
689 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
690 if (error)
691 return error;
692
693 return 0;
694}
695
696static int mxt_get_object_table(struct mxt_data *data)
697{
698 struct i2c_client *client = data->client;
699 size_t table_size;
700 int error;
701 int i;
702 u8 reportid;
703
704 table_size = data->info.object_num * sizeof(struct mxt_object);
705 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
706 data->object_table);
707 if (error)
708 return error;
709
710 /* Valid Report IDs start counting from 1 */
711 reportid = 1;
712 for (i = 0; i < data->info.object_num; i++) {
713 struct mxt_object *object = data->object_table + i;
714 u8 min_id, max_id;
715
716 le16_to_cpus(&object->start_address);
717
718 if (object->num_report_ids) {
719 min_id = reportid;
720 reportid += object->num_report_ids *
721 (object->instances + 1);
722 max_id = reportid - 1;
723 } else {
724 min_id = 0;
725 max_id = 0;
726 }
727
728 dev_dbg(&data->client->dev,
729 "Type %2d Start %3d Size %3d Instances %2d ReportIDs %3u : %3u\n",
730 object->type, object->start_address, object->size + 1,
731 object->instances + 1, min_id, max_id);
732
733 switch (object->type) {
734 case MXT_GEN_COMMAND_T6:
735 data->T6_reportid = min_id;
736 break;
737 case MXT_TOUCH_MULTI_T9:
738 data->T9_reportid_min = min_id;
739 data->T9_reportid_max = max_id;
740 break;
741 case MXT_SPT_GPIOPWM_T19:
742 data->T19_reportid = min_id;
743 break;
744 }
745 }
746
747 return 0;
748}
749
750static void mxt_free_object_table(struct mxt_data *data)
751{
752 kfree(data->object_table);
753 data->object_table = NULL;
754 data->T6_reportid = 0;
755 data->T9_reportid_min = 0;
756 data->T9_reportid_max = 0;
757 data->T19_reportid = 0;
758}
759
760static int mxt_initialize(struct mxt_data *data)
761{
762 struct i2c_client *client = data->client;
763 struct mxt_info *info = &data->info;
764 int error;
765 u8 val;
766
767 error = mxt_get_info(data);
768 if (error)
769 return error;
770
771 data->object_table = kcalloc(info->object_num,
772 sizeof(struct mxt_object),
773 GFP_KERNEL);
774 if (!data->object_table) {
775 dev_err(&client->dev, "Failed to allocate memory\n");
776 return -ENOMEM;
777 }
778
779 /* Get object table information */
780 error = mxt_get_object_table(data);
781 if (error)
782 goto err_free_object_table;
783
784 /* Check register init values */
785 error = mxt_check_reg_init(data);
786 if (error)
787 goto err_free_object_table;
788
789 /* Backup to memory */
790 mxt_write_object(data, MXT_GEN_COMMAND_T6,
791 MXT_COMMAND_BACKUPNV,
792 MXT_BACKUP_VALUE);
793 msleep(MXT_BACKUP_TIME);
794
795 /* Soft reset */
796 mxt_write_object(data, MXT_GEN_COMMAND_T6,
797 MXT_COMMAND_RESET, 1);
798 msleep(MXT_RESET_TIME);
799
800 /* Update matrix size at info struct */
801 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
802 if (error)
803 goto err_free_object_table;
804 info->matrix_xsize = val;
805
806 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
807 if (error)
808 goto err_free_object_table;
809 info->matrix_ysize = val;
810
811 dev_info(&client->dev,
812 "Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
813 info->family_id, info->variant_id, info->version >> 4,
814 info->version & 0xf, info->build);
815
816 dev_info(&client->dev,
817 "Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
818 info->matrix_xsize, info->matrix_ysize,
819 info->object_num);
820
821 return 0;
822
823err_free_object_table:
824 mxt_free_object_table(data);
825 return error;
826}
827
828static void mxt_calc_resolution(struct mxt_data *data)
829{
830 unsigned int max_x = data->pdata->x_size - 1;
831 unsigned int max_y = data->pdata->y_size - 1;
832
833 if (data->pdata->orient & MXT_XY_SWITCH) {
834 data->max_x = max_y;
835 data->max_y = max_x;
836 } else {
837 data->max_x = max_x;
838 data->max_y = max_y;
839 }
840}
841
842/* Firmware Version is returned as Major.Minor.Build */
843static ssize_t mxt_fw_version_show(struct device *dev,
844 struct device_attribute *attr, char *buf)
845{
846 struct mxt_data *data = dev_get_drvdata(dev);
847 struct mxt_info *info = &data->info;
848 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
849 info->version >> 4, info->version & 0xf, info->build);
850}
851
852/* Hardware Version is returned as FamilyID.VariantID */
853static ssize_t mxt_hw_version_show(struct device *dev,
854 struct device_attribute *attr, char *buf)
855{
856 struct mxt_data *data = dev_get_drvdata(dev);
857 struct mxt_info *info = &data->info;
858 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
859 info->family_id, info->variant_id);
860}
861
862static ssize_t mxt_show_instance(char *buf, int count,
863 struct mxt_object *object, int instance,
864 const u8 *val)
865{
866 int i;
867
868 if (object->instances > 0)
869 count += scnprintf(buf + count, PAGE_SIZE - count,
870 "Instance %u\n", instance);
871
872 for (i = 0; i < object->size + 1; i++)
873 count += scnprintf(buf + count, PAGE_SIZE - count,
874 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
875 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
876
877 return count;
878}
879
880static ssize_t mxt_object_show(struct device *dev,
881 struct device_attribute *attr, char *buf)
882{
883 struct mxt_data *data = dev_get_drvdata(dev);
884 struct mxt_object *object;
885 int count = 0;
886 int i, j;
887 int error;
888 u8 *obuf;
889
890 /* Pre-allocate buffer large enough to hold max sized object. */
891 obuf = kmalloc(256, GFP_KERNEL);
892 if (!obuf)
893 return -ENOMEM;
894
895 error = 0;
896 for (i = 0; i < data->info.object_num; i++) {
897 object = data->object_table + i;
898
899 if (!mxt_object_readable(object->type))
900 continue;
901
902 count += scnprintf(buf + count, PAGE_SIZE - count,
903 "T%u:\n", object->type);
904
905 for (j = 0; j < object->instances + 1; j++) {
906 u16 size = object->size + 1;
907 u16 addr = object->start_address + j * size;
908
909 error = __mxt_read_reg(data->client, addr, size, obuf);
910 if (error)
911 goto done;
912
913 count = mxt_show_instance(buf, count, object, j, obuf);
914 }
915 }
916
917done:
918 kfree(obuf);
919 return error ?: count;
920}
921
922static int mxt_load_fw(struct device *dev, const char *fn)
923{
924 struct mxt_data *data = dev_get_drvdata(dev);
925 struct i2c_client *client = data->client;
926 const struct firmware *fw = NULL;
927 unsigned int frame_size;
928 unsigned int pos = 0;
929 int ret;
930
931 ret = request_firmware(&fw, fn, dev);
932 if (ret) {
933 dev_err(dev, "Unable to open firmware %s\n", fn);
934 return ret;
935 }
936
937 /* Change to the bootloader mode */
938 mxt_write_object(data, MXT_GEN_COMMAND_T6,
939 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
940 msleep(MXT_RESET_TIME);
941
942 /* Change to slave address of bootloader */
943 if (client->addr == MXT_APP_LOW)
944 client->addr = MXT_BOOT_LOW;
945 else
946 client->addr = MXT_BOOT_HIGH;
947
948 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
949 if (ret)
950 goto out;
951
952 /* Unlock bootloader */
953 mxt_unlock_bootloader(client);
954
955 while (pos < fw->size) {
956 ret = mxt_check_bootloader(client,
957 MXT_WAITING_FRAME_DATA);
958 if (ret)
959 goto out;
960
961 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
962
963 /* We should add 2 at frame size as the the firmware data is not
964 * included the CRC bytes.
965 */
966 frame_size += 2;
967
968 /* Write one frame to device */
969 mxt_fw_write(client, fw->data + pos, frame_size);
970
971 ret = mxt_check_bootloader(client,
972 MXT_FRAME_CRC_PASS);
973 if (ret)
974 goto out;
975
976 pos += frame_size;
977
978 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
979 }
980
981out:
982 release_firmware(fw);
983
984 /* Change to slave address of application */
985 if (client->addr == MXT_BOOT_LOW)
986 client->addr = MXT_APP_LOW;
987 else
988 client->addr = MXT_APP_HIGH;
989
990 return ret;
991}
992
993static ssize_t mxt_update_fw_store(struct device *dev,
994 struct device_attribute *attr,
995 const char *buf, size_t count)
996{
997 struct mxt_data *data = dev_get_drvdata(dev);
998 int error;
999
1000 disable_irq(data->irq);
1001
1002 error = mxt_load_fw(dev, MXT_FW_NAME);
1003 if (error) {
1004 dev_err(dev, "The firmware update failed(%d)\n", error);
1005 count = error;
1006 } else {
1007 dev_dbg(dev, "The firmware update succeeded\n");
1008
1009 /* Wait for reset */
1010 msleep(MXT_FWRESET_TIME);
1011
1012 mxt_free_object_table(data);
1013
1014 mxt_initialize(data);
1015 }
1016
1017 enable_irq(data->irq);
1018
1019 error = mxt_make_highchg(data);
1020 if (error)
1021 return error;
1022
1023 return count;
1024}
1025
1026static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1027static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1028static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1029static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1030
1031static struct attribute *mxt_attrs[] = {
1032 &dev_attr_fw_version.attr,
1033 &dev_attr_hw_version.attr,
1034 &dev_attr_object.attr,
1035 &dev_attr_update_fw.attr,
1036 NULL
1037};
1038
1039static const struct attribute_group mxt_attr_group = {
1040 .attrs = mxt_attrs,
1041};
1042
1043static void mxt_start(struct mxt_data *data)
1044{
1045 /* Touch enable */
1046 mxt_write_object(data,
1047 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1048}
1049
1050static void mxt_stop(struct mxt_data *data)
1051{
1052 /* Touch disable */
1053 mxt_write_object(data,
1054 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1055}
1056
1057static int mxt_input_open(struct input_dev *dev)
1058{
1059 struct mxt_data *data = input_get_drvdata(dev);
1060
1061 mxt_start(data);
1062
1063 return 0;
1064}
1065
1066static void mxt_input_close(struct input_dev *dev)
1067{
1068 struct mxt_data *data = input_get_drvdata(dev);
1069
1070 mxt_stop(data);
1071}
1072
1073static int mxt_probe(struct i2c_client *client,
1074 const struct i2c_device_id *id)
1075{
1076 const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
1077 struct mxt_data *data;
1078 struct input_dev *input_dev;
1079 int error;
1080 unsigned int num_mt_slots;
1081 unsigned int mt_flags = 0;
1082 int i;
1083
1084 if (!pdata)
1085 return -EINVAL;
1086
1087 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1088 input_dev = input_allocate_device();
1089 if (!data || !input_dev) {
1090 dev_err(&client->dev, "Failed to allocate memory\n");
1091 error = -ENOMEM;
1092 goto err_free_mem;
1093 }
1094
1095 input_dev->name = "Atmel maXTouch Touchscreen";
1096 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1097 client->adapter->nr, client->addr);
1098
1099 input_dev->phys = data->phys;
1100
1101 input_dev->id.bustype = BUS_I2C;
1102 input_dev->dev.parent = &client->dev;
1103 input_dev->open = mxt_input_open;
1104 input_dev->close = mxt_input_close;
1105
1106 data->client = client;
1107 data->input_dev = input_dev;
1108 data->pdata = pdata;
1109 data->irq = client->irq;
1110
1111 mxt_calc_resolution(data);
1112
1113 error = mxt_initialize(data);
1114 if (error)
1115 goto err_free_mem;
1116
1117 __set_bit(EV_ABS, input_dev->evbit);
1118 __set_bit(EV_KEY, input_dev->evbit);
1119 __set_bit(BTN_TOUCH, input_dev->keybit);
1120
1121 if (pdata->t19_num_keys) {
1122 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1123
1124 for (i = 0; i < pdata->t19_num_keys; i++)
1125 if (pdata->t19_keymap[i] != KEY_RESERVED)
1126 input_set_capability(input_dev, EV_KEY,
1127 pdata->t19_keymap[i]);
1128
1129 mt_flags |= INPUT_MT_POINTER;
1130
1131 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1132 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1133 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1134 MXT_PIXELS_PER_MM);
1135 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1136 MXT_PIXELS_PER_MM);
1137
1138 input_dev->name = "Atmel maXTouch Touchpad";
1139 }
1140
1141 /* For single touch */
1142 input_set_abs_params(input_dev, ABS_X,
1143 0, data->max_x, 0, 0);
1144 input_set_abs_params(input_dev, ABS_Y,
1145 0, data->max_y, 0, 0);
1146 input_set_abs_params(input_dev, ABS_PRESSURE,
1147 0, 255, 0, 0);
1148
1149 /* For multi touch */
1150 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1151 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1152 if (error)
1153 goto err_free_object;
1154 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1155 0, MXT_MAX_AREA, 0, 0);
1156 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1157 0, data->max_x, 0, 0);
1158 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1159 0, data->max_y, 0, 0);
1160 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1161 0, 255, 0, 0);
1162
1163 input_set_drvdata(input_dev, data);
1164 i2c_set_clientdata(client, data);
1165
1166 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1167 pdata->irqflags | IRQF_ONESHOT,
1168 client->name, data);
1169 if (error) {
1170 dev_err(&client->dev, "Failed to register interrupt\n");
1171 goto err_free_object;
1172 }
1173
1174 error = mxt_make_highchg(data);
1175 if (error)
1176 goto err_free_irq;
1177
1178 error = input_register_device(input_dev);
1179 if (error)
1180 goto err_free_irq;
1181
1182 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1183 if (error)
1184 goto err_unregister_device;
1185
1186 return 0;
1187
1188err_unregister_device:
1189 input_unregister_device(input_dev);
1190 input_dev = NULL;
1191err_free_irq:
1192 free_irq(client->irq, data);
1193err_free_object:
1194 kfree(data->object_table);
1195err_free_mem:
1196 input_free_device(input_dev);
1197 kfree(data);
1198 return error;
1199}
1200
1201static int mxt_remove(struct i2c_client *client)
1202{
1203 struct mxt_data *data = i2c_get_clientdata(client);
1204
1205 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1206 free_irq(data->irq, data);
1207 input_unregister_device(data->input_dev);
1208 kfree(data->object_table);
1209 kfree(data);
1210
1211 return 0;
1212}
1213
1214#ifdef CONFIG_PM_SLEEP
1215static int mxt_suspend(struct device *dev)
1216{
1217 struct i2c_client *client = to_i2c_client(dev);
1218 struct mxt_data *data = i2c_get_clientdata(client);
1219 struct input_dev *input_dev = data->input_dev;
1220
1221 mutex_lock(&input_dev->mutex);
1222
1223 if (input_dev->users)
1224 mxt_stop(data);
1225
1226 mutex_unlock(&input_dev->mutex);
1227
1228 return 0;
1229}
1230
1231static int mxt_resume(struct device *dev)
1232{
1233 struct i2c_client *client = to_i2c_client(dev);
1234 struct mxt_data *data = i2c_get_clientdata(client);
1235 struct input_dev *input_dev = data->input_dev;
1236
1237 /* Soft reset */
1238 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1239 MXT_COMMAND_RESET, 1);
1240
1241 msleep(MXT_RESET_TIME);
1242
1243 mutex_lock(&input_dev->mutex);
1244
1245 if (input_dev->users)
1246 mxt_start(data);
1247
1248 mutex_unlock(&input_dev->mutex);
1249
1250 return 0;
1251}
1252#endif
1253
1254static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1255
1256static const struct i2c_device_id mxt_id[] = {
1257 { "qt602240_ts", 0 },
1258 { "atmel_mxt_ts", 0 },
1259 { "atmel_mxt_tp", 0 },
1260 { "mXT224", 0 },
1261 { }
1262};
1263MODULE_DEVICE_TABLE(i2c, mxt_id);
1264
1265static struct i2c_driver mxt_driver = {
1266 .driver = {
1267 .name = "atmel_mxt_ts",
1268 .owner = THIS_MODULE,
1269 .pm = &mxt_pm_ops,
1270 },
1271 .probe = mxt_probe,
1272 .remove = mxt_remove,
1273 .id_table = mxt_id,
1274};
1275
1276module_i2c_driver(mxt_driver);
1277
1278/* Module information */
1279MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1280MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1281MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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