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Input: wm971x - fix typo in module parameter description
[deliverable/linux.git] / drivers / input / touchscreen / atmel_mxt_ts.c
CommitLineData
4cf51c38 1/*
7686b108 2 * Atmel maXTouch Touchscreen driver
4cf51c38
JS		 3 *
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
50a77c65 5 * Copyright (C) 2011-2014 Atmel Corporation
1e0c0c5b
DK		 6 * Copyright (C) 2012 Google, Inc.
7 *
4cf51c38
JS		 8 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16
17#include <linux/module.h>
d79e7e47
BL		 18#include <linux/init.h>
19#include <linux/completion.h>
4cf51c38
JS		 20#include <linux/delay.h>
21#include <linux/firmware.h>
22#include <linux/i2c.h>
964de521 23#include <linux/i2c/atmel_mxt_ts.h>
8b86c1c2 24#include <linux/input/mt.h>
4cf51c38 25#include <linux/interrupt.h>
78188be3 26#include <linux/of.h>
4cf51c38
JS		 27#include <linux/slab.h>
28
29/* Version */
7686b108
IV		 30#define MXT_VER_20 20
31#define MXT_VER_21 21
32#define MXT_VER_22 22
4cf51c38 33
50a77c65 34/* Firmware files */
7686b108 35#define MXT_FW_NAME "maxtouch.fw"
50a77c65
ND		 36#define MXT_CFG_NAME "maxtouch.cfg"
37#define MXT_CFG_MAGIC "OBP_RAW V1"
4cf51c38
JS		 38
39/* Registers */
23003a84 40#define MXT_INFO 0x00
7686b108
IV		 41#define MXT_FAMILY_ID 0x00
42#define MXT_VARIANT_ID 0x01
43#define MXT_VERSION 0x02
44#define MXT_BUILD 0x03
45#define MXT_MATRIX_X_SIZE 0x04
46#define MXT_MATRIX_Y_SIZE 0x05
47#define MXT_OBJECT_NUM 0x06
48#define MXT_OBJECT_START 0x07
4cf51c38 49
7686b108 50#define MXT_OBJECT_SIZE 6
4ce6fa01
ND		 51#define MXT_INFO_CHECKSUM_SIZE 3
52#define MXT_MAX_BLOCK_WRITE 256
4cf51c38
JS		 53
54/* Object types */
81c88a71
IV		 55#define MXT_DEBUG_DIAGNOSTIC_T37 37
56#define MXT_GEN_MESSAGE_T5 5
57#define MXT_GEN_COMMAND_T6 6
58#define MXT_GEN_POWER_T7 7
59#define MXT_GEN_ACQUIRE_T8 8
60#define MXT_GEN_DATASOURCE_T53 53
61#define MXT_TOUCH_MULTI_T9 9
62#define MXT_TOUCH_KEYARRAY_T15 15
63#define MXT_TOUCH_PROXIMITY_T23 23
64#define MXT_TOUCH_PROXKEY_T52 52
65#define MXT_PROCI_GRIPFACE_T20 20
66#define MXT_PROCG_NOISE_T22 22
67#define MXT_PROCI_ONETOUCH_T24 24
68#define MXT_PROCI_TWOTOUCH_T27 27
69#define MXT_PROCI_GRIP_T40 40
70#define MXT_PROCI_PALM_T41 41
71#define MXT_PROCI_TOUCHSUPPRESSION_T42 42
72#define MXT_PROCI_STYLUS_T47 47
73#define MXT_PROCG_NOISESUPPRESSION_T48 48
74#define MXT_SPT_COMMSCONFIG_T18 18
75#define MXT_SPT_GPIOPWM_T19 19
76#define MXT_SPT_SELFTEST_T25 25
77#define MXT_SPT_CTECONFIG_T28 28
78#define MXT_SPT_USERDATA_T38 38
79#define MXT_SPT_DIGITIZER_T43 43
80#define MXT_SPT_MESSAGECOUNT_T44 44
81#define MXT_SPT_CTECONFIG_T46 46
82
5f3f9bc2
ND		 83/* MXT_GEN_MESSAGE_T5 object */
84#define MXT_RPTID_NOMSG 0xff
85
81c88a71 86/* MXT_GEN_COMMAND_T6 field */
7686b108
IV		 87#define MXT_COMMAND_RESET 0
88#define MXT_COMMAND_BACKUPNV 1
89#define MXT_COMMAND_CALIBRATE 2
90#define MXT_COMMAND_REPORTALL 3
91#define MXT_COMMAND_DIAGNOSTIC 5
92
a4a2ef46
IV		 93/* Define for T6 status byte */
94#define MXT_T6_STATUS_RESET (1 << 7)
497767d1
ND		 95#define MXT_T6_STATUS_OFL (1 << 6)
96#define MXT_T6_STATUS_SIGERR (1 << 5)
97#define MXT_T6_STATUS_CAL (1 << 4)
98#define MXT_T6_STATUS_CFGERR (1 << 3)
99#define MXT_T6_STATUS_COMSERR (1 << 2)
a4a2ef46 100
81c88a71 101/* MXT_GEN_POWER_T7 field */
9d469d03
ND		 102struct t7_config {
103 u8 idle;
104 u8 active;
105} __packed;
106
107#define MXT_POWER_CFG_RUN 0
108#define MXT_POWER_CFG_DEEPSLEEP 1
7686b108 109
81c88a71 110/* MXT_GEN_ACQUIRE_T8 field */
7686b108
IV		 111#define MXT_ACQUIRE_CHRGTIME 0
112#define MXT_ACQUIRE_TCHDRIFT 2
113#define MXT_ACQUIRE_DRIFTST 3
114#define MXT_ACQUIRE_TCHAUTOCAL 4
115#define MXT_ACQUIRE_SYNC 5
116#define MXT_ACQUIRE_ATCHCALST 6
117#define MXT_ACQUIRE_ATCHCALSTHR 7
118
81c88a71 119/* MXT_TOUCH_MULTI_T9 field */
61dc1aba
ND		 120#define MXT_T9_ORIENT 9
121#define MXT_T9_RANGE 18
122
f3889ed1
ND		 123/* MXT_TOUCH_MULTI_T9 status */
124#define MXT_T9_UNGRIP (1 << 0)
125#define MXT_T9_SUPPRESS (1 << 1)
126#define MXT_T9_AMP (1 << 2)
127#define MXT_T9_VECTOR (1 << 3)
128#define MXT_T9_MOVE (1 << 4)
129#define MXT_T9_RELEASE (1 << 5)
130#define MXT_T9_PRESS (1 << 6)
131#define MXT_T9_DETECT (1 << 7)
132
61dc1aba
ND		 133struct t9_range {
134 u16 x;
135 u16 y;
136} __packed;
137
f3889ed1
ND		 138/* MXT_TOUCH_MULTI_T9 orient */
139#define MXT_T9_ORIENT_SWITCH (1 << 0)
7686b108 140
81c88a71 141/* MXT_PROCI_GRIPFACE_T20 field */
7686b108
IV		 142#define MXT_GRIPFACE_CTRL 0
143#define MXT_GRIPFACE_XLOGRIP 1
144#define MXT_GRIPFACE_XHIGRIP 2
145#define MXT_GRIPFACE_YLOGRIP 3
146#define MXT_GRIPFACE_YHIGRIP 4
147#define MXT_GRIPFACE_MAXTCHS 5
148#define MXT_GRIPFACE_SZTHR1 7
149#define MXT_GRIPFACE_SZTHR2 8
150#define MXT_GRIPFACE_SHPTHR1 9
151#define MXT_GRIPFACE_SHPTHR2 10
152#define MXT_GRIPFACE_SUPEXTTO 11
153
154/* MXT_PROCI_NOISE field */
155#define MXT_NOISE_CTRL 0
156#define MXT_NOISE_OUTFLEN 1
157#define MXT_NOISE_GCAFUL_LSB 3
158#define MXT_NOISE_GCAFUL_MSB 4
159#define MXT_NOISE_GCAFLL_LSB 5
160#define MXT_NOISE_GCAFLL_MSB 6
161#define MXT_NOISE_ACTVGCAFVALID 7
162#define MXT_NOISE_NOISETHR 8
163#define MXT_NOISE_FREQHOPSCALE 10
164#define MXT_NOISE_FREQ0 11
165#define MXT_NOISE_FREQ1 12
166#define MXT_NOISE_FREQ2 13
167#define MXT_NOISE_FREQ3 14
168#define MXT_NOISE_FREQ4 15
169#define MXT_NOISE_IDLEGCAFVALID 16
170
81c88a71 171/* MXT_SPT_COMMSCONFIG_T18 */
7686b108
IV		 172#define MXT_COMMS_CTRL 0
173#define MXT_COMMS_CMD 1
174
81c88a71 175/* MXT_SPT_CTECONFIG_T28 field */
7686b108
IV		 176#define MXT_CTE_CTRL 0
177#define MXT_CTE_CMD 1
178#define MXT_CTE_MODE 2
179#define MXT_CTE_IDLEGCAFDEPTH 3
180#define MXT_CTE_ACTVGCAFDEPTH 4
979a72da 181#define MXT_CTE_VOLTAGE 5
7686b108
IV		 182
183#define MXT_VOLTAGE_DEFAULT 2700000
184#define MXT_VOLTAGE_STEP 10000
185
81c88a71 186/* Define for MXT_GEN_COMMAND_T6 */
7686b108 187#define MXT_BOOT_VALUE 0xa5
a4a2ef46 188#define MXT_RESET_VALUE 0x01
7686b108 189#define MXT_BACKUP_VALUE 0x55
a4a2ef46
IV		 190
191/* Delay times */
8343bce1
LT		 192#define MXT_BACKUP_TIME 50 /* msec */
193#define MXT_RESET_TIME 200 /* msec */
a4a2ef46 194#define MXT_RESET_TIMEOUT 3000 /* msec */
c3f78043 195#define MXT_CRC_TIMEOUT 1000 /* msec */
a0434b75
BL		 196#define MXT_FW_RESET_TIME 3000 /* msec */
197#define MXT_FW_CHG_TIMEOUT 300 /* msec */
4cf51c38
JS		 198
199/* Command to unlock bootloader */
7686b108
IV		 200#define MXT_UNLOCK_CMD_MSB 0xaa
201#define MXT_UNLOCK_CMD_LSB 0xdc
4cf51c38
JS		 202
203/* Bootloader mode status */
7686b108
IV		 204#define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
205#define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
206#define MXT_FRAME_CRC_CHECK 0x02
207#define MXT_FRAME_CRC_FAIL 0x03
208#define MXT_FRAME_CRC_PASS 0x04
209#define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
210#define MXT_BOOT_STATUS_MASK 0x3f
e57a66aa
ND		 211#define MXT_BOOT_EXTENDED_ID (1 << 5)
212#define MXT_BOOT_ID_MASK 0x1f
4cf51c38 213
4cf51c38 214/* Touchscreen absolute values */
7686b108 215#define MXT_MAX_AREA 0xff
4cf51c38 216
22dfab7f
DK		 217#define MXT_PIXELS_PER_MM 20
218
7686b108 219struct mxt_info {
4cf51c38
JS		 220 u8 family_id;
221 u8 variant_id;
222 u8 version;
223 u8 build;
224 u8 matrix_xsize;
225 u8 matrix_ysize;
226 u8 object_num;
227};
228
7686b108 229struct mxt_object {
4cf51c38
JS		 230 u8 type;
231 u16 start_address;
1e0c0c5b
DK		 232 u8 size_minus_one;
233 u8 instances_minus_one;
4cf51c38 234 u8 num_report_ids;
333e5a9a 235} __packed;
4cf51c38 236
4cf51c38 237/* Each client has this additional data */
7686b108 238struct mxt_data {
4cf51c38
JS		 239 struct i2c_client *client;
240 struct input_dev *input_dev;
ec02ac2b 241 char phys[64]; /* device physical location */
7686b108
IV		 242 const struct mxt_platform_data *pdata;
243 struct mxt_object *object_table;
244 struct mxt_info info;
4cf51c38 245 unsigned int irq;
910d8051
JS		 246 unsigned int max_x;
247 unsigned int max_y;
d79e7e47 248 bool in_bootloader;
4ce6fa01 249 u16 mem_size;
9d8dc3e5 250 u8 max_reportid;
c3f78043 251 u32 config_crc;
4ce6fa01 252 u32 info_crc;
f28a842d 253 u8 bootloader_addr;
5f3f9bc2 254 u8 *msg_buf;
497767d1 255 u8 t6_status;
b9b05a89 256 bool update_input;
9d8dc3e5
ND		 257 u8 last_message_count;
258 u8 num_touchids;
9d469d03 259 struct t7_config t7_cfg;
333e5a9a
DK		 260
261 /* Cached parameters from object table */
b9b05a89 262 u16 T5_address;
5f3f9bc2 263 u8 T5_msg_size;
fdf80421 264 u8 T6_reportid;
a4a2ef46 265 u16 T6_address;
4ce6fa01 266 u16 T7_address;
333e5a9a
DK		 267 u8 T9_reportid_min;
268 u8 T9_reportid_max;
22dfab7f 269 u8 T19_reportid;
9d8dc3e5 270 u16 T44_address;
d79e7e47
BL		 271
272 /* for fw update in bootloader */
273 struct completion bl_completion;
a4a2ef46
IV		 274
275 /* for reset handling */
276 struct completion reset_completion;
c3f78043
ND		 277
278 /* for config update handling */
279 struct completion crc_completion;
4cf51c38
JS		 280};
281
1e0c0c5b
DK		 282static size_t mxt_obj_size(const struct mxt_object *obj)
283{
284 return obj->size_minus_one + 1;
285}
286
287static size_t mxt_obj_instances(const struct mxt_object *obj)
288{
289 return obj->instances_minus_one + 1;
290}
291
7686b108 292static bool mxt_object_readable(unsigned int type)
4cf51c38
JS		 293{
294 switch (type) {
81c88a71
IV		 295 case MXT_GEN_COMMAND_T6:
296 case MXT_GEN_POWER_T7:
297 case MXT_GEN_ACQUIRE_T8:
298 case MXT_GEN_DATASOURCE_T53:
299 case MXT_TOUCH_MULTI_T9:
300 case MXT_TOUCH_KEYARRAY_T15:
301 case MXT_TOUCH_PROXIMITY_T23:
302 case MXT_TOUCH_PROXKEY_T52:
303 case MXT_PROCI_GRIPFACE_T20:
304 case MXT_PROCG_NOISE_T22:
305 case MXT_PROCI_ONETOUCH_T24:
306 case MXT_PROCI_TWOTOUCH_T27:
307 case MXT_PROCI_GRIP_T40:
308 case MXT_PROCI_PALM_T41:
309 case MXT_PROCI_TOUCHSUPPRESSION_T42:
310 case MXT_PROCI_STYLUS_T47:
311 case MXT_PROCG_NOISESUPPRESSION_T48:
312 case MXT_SPT_COMMSCONFIG_T18:
313 case MXT_SPT_GPIOPWM_T19:
314 case MXT_SPT_SELFTEST_T25:
315 case MXT_SPT_CTECONFIG_T28:
316 case MXT_SPT_USERDATA_T38:
317 case MXT_SPT_DIGITIZER_T43:
318 case MXT_SPT_CTECONFIG_T46:
4cf51c38
JS		 319 return true;
320 default:
321 return false;
322 }
323}
324
5f3f9bc2 325static void mxt_dump_message(struct mxt_data *data, u8 *message)
4cf51c38 326{
5f3f9bc2
ND		 327 dev_dbg(&data->client->dev, "message: %*ph\n",
328 data->T5_msg_size, message);
4cf51c38
JS		 329}
330
a4a2ef46
IV		 331static int mxt_wait_for_completion(struct mxt_data *data,
332 struct completion *comp,
333 unsigned int timeout_ms)
d79e7e47
BL		 334{
335 struct device *dev = &data->client->dev;
d79e7e47
BL		 336 unsigned long timeout = msecs_to_jiffies(timeout_ms);
337 long ret;
338
339 ret = wait_for_completion_interruptible_timeout(comp, timeout);
340 if (ret < 0) {
341 return ret;
342 } else if (ret == 0) {
343 dev_err(dev, "Wait for completion timed out.\n");
344 return -ETIMEDOUT;
345 }
346 return 0;
347}
348
f28a842d
ND		 349static int mxt_bootloader_read(struct mxt_data *data,
350 u8 *val, unsigned int count)
351{
352 int ret;
353 struct i2c_msg msg;
354
355 msg.addr = data->bootloader_addr;
356 msg.flags = data->client->flags & I2C_M_TEN;
357 msg.flags |= I2C_M_RD;
358 msg.len = count;
359 msg.buf = val;
360
361 ret = i2c_transfer(data->client->adapter, &msg, 1);
f28a842d
ND		 362 if (ret == 1) {
363 ret = 0;
364 } else {
365 ret = ret < 0 ? ret : -EIO;
366 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
367 __func__, ret);
368 }
369
370 return ret;
371}
372
373static int mxt_bootloader_write(struct mxt_data *data,
374 const u8 * const val, unsigned int count)
375{
376 int ret;
377 struct i2c_msg msg;
378
379 msg.addr = data->bootloader_addr;
380 msg.flags = data->client->flags & I2C_M_TEN;
381 msg.len = count;
382 msg.buf = (u8 *)val;
383
384 ret = i2c_transfer(data->client->adapter, &msg, 1);
385 if (ret == 1) {
386 ret = 0;
387 } else {
388 ret = ret < 0 ? ret : -EIO;
389 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
390 __func__, ret);
391 }
392
393 return ret;
394}
395
8efaa5e5 396static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
f28a842d
ND		 397{
398 u8 appmode = data->client->addr;
399 u8 bootloader;
400
401 switch (appmode) {
402 case 0x4a:
403 case 0x4b:
44a0bab2 404 /* Chips after 1664S use different scheme */
8efaa5e5 405 if (retry || data->info.family_id >= 0xa2) {
44a0bab2
ND		 406 bootloader = appmode - 0x24;
407 break;
408 }
409 /* Fall through for normal case */
f28a842d
ND		 410 case 0x4c:
411 case 0x4d:
412 case 0x5a:
413 case 0x5b:
414 bootloader = appmode - 0x26;
415 break;
6cd1ab0f 416
f28a842d
ND		 417 default:
418 dev_err(&data->client->dev,
419 "Appmode i2c address 0x%02x not found\n",
420 appmode);
421 return -EINVAL;
422 }
423
424 data->bootloader_addr = bootloader;
425 return 0;
426}
427
6cd1ab0f 428static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
a9fdd1e6
ND		 429{
430 struct device *dev = &data->client->dev;
6cd1ab0f 431 int error;
a9fdd1e6
ND		 432 u8 val;
433 bool crc_failure;
434
6cd1ab0f
DT		 435 error = mxt_lookup_bootloader_address(data, alt_address);
436 if (error)
437 return error;
a9fdd1e6 438
6cd1ab0f
DT		 439 error = mxt_bootloader_read(data, &val, 1);
440 if (error)
441 return error;
a9fdd1e6
ND		 442
443 /* Check app crc fail mode */
444 crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
445
446 dev_err(dev, "Detected bootloader, status:%02X%s\n",
447 val, crc_failure ? ", APP_CRC_FAIL" : "");
448
449 return 0;
450}
451
e57a66aa
ND		 452static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
453{
454 struct device *dev = &data->client->dev;
455 u8 buf[3];
456
457 if (val & MXT_BOOT_EXTENDED_ID) {
458 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
459 dev_err(dev, "%s: i2c failure\n", __func__);
68807a0c 460 return val;
e57a66aa
ND		 461 }
462
463 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
464
465 return buf[0];
466 } else {
467 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
468
469 return val;
470 }
471}
472
385deb96
ND		 473static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
474 bool wait)
4cf51c38 475{
f28a842d 476 struct device *dev = &data->client->dev;
4cf51c38 477 u8 val;
d79e7e47 478 int ret;
4cf51c38
JS		 479
480recheck:
385deb96 481 if (wait) {
d79e7e47
BL		 482 /*
483 * In application update mode, the interrupt
484 * line signals state transitions. We must wait for the
485 * CHG assertion before reading the status byte.
486 * Once the status byte has been read, the line is deasserted.
487 */
a4a2ef46
IV		 488 ret = mxt_wait_for_completion(data, &data->bl_completion,
489 MXT_FW_CHG_TIMEOUT);
d79e7e47
BL		 490 if (ret) {
491 /*
492 * TODO: handle -ERESTARTSYS better by terminating
493 * fw update process before returning to userspace
494 * by writing length 0x000 to device (iff we are in
495 * WAITING_FRAME_DATA state).
496 */
f28a842d 497 dev_err(dev, "Update wait error %d\n", ret);
d79e7e47
BL		 498 return ret;
499 }
500 }
501
f28a842d
ND		 502 ret = mxt_bootloader_read(data, &val, 1);
503 if (ret)
504 return ret;
4cf51c38 505
e57a66aa
ND		 506 if (state == MXT_WAITING_BOOTLOAD_CMD)
507 val = mxt_get_bootloader_version(data, val);
508
4cf51c38 509 switch (state) {
7686b108
IV		 510 case MXT_WAITING_BOOTLOAD_CMD:
511 case MXT_WAITING_FRAME_DATA:
a9fdd1e6 512 case MXT_APP_CRC_FAIL:
7686b108 513 val &= ~MXT_BOOT_STATUS_MASK;
4cf51c38 514 break;
7686b108 515 case MXT_FRAME_CRC_PASS:
f943c74a 516 if (val == MXT_FRAME_CRC_CHECK) {
4cf51c38 517 goto recheck;
f943c74a
ND		 518 } else if (val == MXT_FRAME_CRC_FAIL) {
519 dev_err(dev, "Bootloader CRC fail\n");
520 return -EINVAL;
521 }
4cf51c38
JS		 522 break;
523 default:
524 return -EINVAL;
525 }
526
527 if (val != state) {
f28a842d 528 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
7bed6805 529 val, state);
4cf51c38
JS		 530 return -EINVAL;
531 }
532
533 return 0;
534}
535
8efaa5e5 536static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
4cf51c38 537{
f28a842d 538 int ret;
4cf51c38
JS		 539 u8 buf[2];
540
8efaa5e5
ND		 541 if (unlock) {
542 buf[0] = MXT_UNLOCK_CMD_LSB;
543 buf[1] = MXT_UNLOCK_CMD_MSB;
544 } else {
545 buf[0] = 0x01;
546 buf[1] = 0x01;
547 }
4cf51c38 548
f28a842d
ND		 549 ret = mxt_bootloader_write(data, buf, 2);
550 if (ret)
551 return ret;
4cf51c38
JS		 552
553 return 0;
554}
555
7686b108 556static int __mxt_read_reg(struct i2c_client *client,
4cf51c38
JS		 557 u16 reg, u16 len, void *val)
558{
559 struct i2c_msg xfer[2];
560 u8 buf[2];
771733e3 561 int ret;
4cf51c38
JS		 562
563 buf[0] = reg & 0xff;
564 buf[1] = (reg >> 8) & 0xff;
565
566 /* Write register */
567 xfer[0].addr = client->addr;
568 xfer[0].flags = 0;
569 xfer[0].len = 2;
570 xfer[0].buf = buf;
571
572 /* Read data */
573 xfer[1].addr = client->addr;
574 xfer[1].flags = I2C_M_RD;
575 xfer[1].len = len;
576 xfer[1].buf = val;
577
771733e3
DK		 578 ret = i2c_transfer(client->adapter, xfer, 2);
579 if (ret == 2) {
580 ret = 0;
581 } else {
582 if (ret >= 0)
583 ret = -EIO;
584 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
585 __func__, ret);
4cf51c38
JS		 586 }
587
771733e3 588 return ret;
4cf51c38
JS		 589}
590
9638ab7c
DK		 591static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
592 const void *val)
4cf51c38 593{
9638ab7c
DK		 594 u8 *buf;
595 size_t count;
771733e3 596 int ret;
4cf51c38 597
9638ab7c
DK		 598 count = len + 2;
599 buf = kmalloc(count, GFP_KERNEL);
600 if (!buf)
601 return -ENOMEM;
4cf51c38
JS		 602
603 buf[0] = reg & 0xff;
604 buf[1] = (reg >> 8) & 0xff;
9638ab7c 605 memcpy(&buf[2], val, len);
4cf51c38 606
9638ab7c
DK		 607 ret = i2c_master_send(client, buf, count);
608 if (ret == count) {
771733e3
DK		 609 ret = 0;
610 } else {
611 if (ret >= 0)
612 ret = -EIO;
613 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
614 __func__, ret);
4cf51c38
JS		 615 }
616
9638ab7c 617 kfree(buf);
771733e3 618 return ret;
4cf51c38
JS		 619}
620
9638ab7c 621static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
4cf51c38 622{
9638ab7c 623 return __mxt_write_reg(client, reg, 1, &val);
4cf51c38
JS		 624}
625
7686b108
IV		 626static struct mxt_object *
627mxt_get_object(struct mxt_data *data, u8 type)
4cf51c38 628{
7686b108 629 struct mxt_object *object;
4cf51c38
JS		 630 int i;
631
632 for (i = 0; i < data->info.object_num; i++) {
633 object = data->object_table + i;
634 if (object->type == type)
635 return object;
636 }
637
50a77c65 638 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
4cf51c38
JS		 639 return NULL;
640}
641
497767d1
ND		 642static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
643{
644 struct device *dev = &data->client->dev;
645 u8 status = msg[1];
646 u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
647
648 complete(&data->crc_completion);
649
650 if (crc != data->config_crc) {
651 data->config_crc = crc;
652 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
653 }
654
655 /* Detect reset */
656 if (status & MXT_T6_STATUS_RESET)
657 complete(&data->reset_completion);
658
659 /* Output debug if status has changed */
660 if (status != data->t6_status)
661 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
662 status,
663 status == 0 ? " OK" : "",
664 status & MXT_T6_STATUS_RESET ? " RESET" : "",
665 status & MXT_T6_STATUS_OFL ? " OFL" : "",
666 status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
667 status & MXT_T6_STATUS_CAL ? " CAL" : "",
668 status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
669 status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
670
671 /* Save current status */
672 data->t6_status = status;
673}
674
5f3f9bc2 675static void mxt_input_button(struct mxt_data *data, u8 *message)
22dfab7f
DK		 676{
677 struct input_dev *input = data->input_dev;
fb5e4c3e 678 const struct mxt_platform_data *pdata = data->pdata;
22dfab7f
DK		 679 bool button;
680 int i;
681
682 /* Active-low switch */
fb5e4c3e
ND		 683 for (i = 0; i < pdata->t19_num_keys; i++) {
684 if (pdata->t19_keymap[i] == KEY_RESERVED)
22dfab7f 685 continue;
5f3f9bc2 686 button = !(message[1] & (1 << i));
fb5e4c3e 687 input_report_key(input, pdata->t19_keymap[i], button);
22dfab7f
DK		 688 }
689}
690
b735fbe0 691static void mxt_input_sync(struct mxt_data *data)
eef820dc 692{
b735fbe0
BL		 693 input_mt_report_pointer_emulation(data->input_dev,
694 data->pdata->t19_num_keys);
695 input_sync(data->input_dev);
eef820dc
ND		 696}
697
b9b05a89 698static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
4cf51c38 699{
4cf51c38 700 struct device *dev = &data->client->dev;
fba5bc31 701 struct input_dev *input_dev = data->input_dev;
5f3f9bc2
ND		 702 int id;
703 u8 status;
4cf51c38
JS		 704 int x;
705 int y;
706 int area;
fea9e467 707 int amplitude;
4cf51c38 708
5f3f9bc2
ND		 709 id = message[0] - data->T9_reportid_min;
710 status = message[1];
711 x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
712 y = (message[3] << 4) | ((message[4] & 0xf));
eef820dc
ND		 713
714 /* Handle 10/12 bit switching */
910d8051 715 if (data->max_x < 1024)
eef820dc 716 x >>= 2;
910d8051 717 if (data->max_y < 1024)
eef820dc 718 y >>= 2;
910d8051 719
5f3f9bc2
ND		 720 area = message[5];
721 amplitude = message[6];
4cf51c38 722
b2e459b8
DK		 723 dev_dbg(dev,
724 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
725 id,
f3889ed1
ND		 726 (status & MXT_T9_DETECT) ? 'D' : '.',
727 (status & MXT_T9_PRESS) ? 'P' : '.',
728 (status & MXT_T9_RELEASE) ? 'R' : '.',
729 (status & MXT_T9_MOVE) ? 'M' : '.',
730 (status & MXT_T9_VECTOR) ? 'V' : '.',
731 (status & MXT_T9_AMP) ? 'A' : '.',
732 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
733 (status & MXT_T9_UNGRIP) ? 'U' : '.',
fea9e467 734 x, y, area, amplitude);
b2e459b8 735
fba5bc31 736 input_mt_slot(input_dev, id);
fba5bc31 737
f3889ed1 738 if (status & MXT_T9_DETECT) {
eef820dc
ND		 739 /*
740 * Multiple bits may be set if the host is slow to read
741 * the status messages, indicating all the events that
742 * have happened.
743 */
744 if (status & MXT_T9_RELEASE) {
745 input_mt_report_slot_state(input_dev,
746 MT_TOOL_FINGER, 0);
b735fbe0 747 mxt_input_sync(data);
eef820dc
ND		 748 }
749
750 /* Touch active */
751 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
fba5bc31
DK		 752 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
753 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
fea9e467 754 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
fba5bc31 755 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
eef820dc
ND		 756 } else {
757 /* Touch no longer active, close out slot */
758 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
fba5bc31 759 }
b9b05a89
ND		 760
761 data->update_input = true;
4cf51c38 762}
4cf51c38 763
b9b05a89 764static int mxt_proc_message(struct mxt_data *data, u8 *message)
04a79181 765{
b9b05a89
ND		 766 u8 report_id = message[0];
767
768 if (report_id == MXT_RPTID_NOMSG)
769 return 0;
770
771 if (report_id == data->T6_reportid) {
772 mxt_proc_t6_messages(data, message);
773 } else if (!data->input_dev) {
774 /*
775 * Do not report events if input device
776 * is not yet registered.
777 */
778 mxt_dump_message(data, message);
779 } else if (report_id >= data->T9_reportid_min
780 && report_id <= data->T9_reportid_max) {
781 mxt_proc_t9_message(data, message);
782 } else if (report_id == data->T19_reportid) {
783 mxt_input_button(data, message);
784 data->update_input = true;
785 } else {
786 mxt_dump_message(data, message);
787 }
788
789 return 1;
4cf51c38
JS		 790}
791
9d8dc3e5 792static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
4cf51c38 793{
4cf51c38 794 struct device *dev = &data->client->dev;
b9b05a89 795 int ret;
9d8dc3e5
ND		 796 int i;
797 u8 num_valid = 0;
798
799 /* Safety check for msg_buf */
800 if (count > data->max_reportid)
801 return -EINVAL;
4cf51c38 802
9d8dc3e5 803 /* Process remaining messages if necessary */
b9b05a89 804 ret = __mxt_read_reg(data->client, data->T5_address,
9d8dc3e5 805 data->T5_msg_size * count, data->msg_buf);
b9b05a89 806 if (ret) {
9d8dc3e5 807 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
b9b05a89
ND		 808 return ret;
809 }
4cf51c38 810
9d8dc3e5
ND		 811 for (i = 0; i < count; i++) {
812 ret = mxt_proc_message(data,
813 data->msg_buf + data->T5_msg_size * i);
814
815 if (ret == 1)
816 num_valid++;
817 }
818
819 /* return number of messages read */
820 return num_valid;
b9b05a89 821}
4cf51c38 822
9d8dc3e5 823static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
b9b05a89 824{
9d8dc3e5 825 struct device *dev = &data->client->dev;
b9b05a89 826 int ret;
9d8dc3e5 827 u8 count, num_left;
4cf51c38 828
9d8dc3e5
ND		 829 /* Read T44 and T5 together */
830 ret = __mxt_read_reg(data->client, data->T44_address,
831 data->T5_msg_size + 1, data->msg_buf);
832 if (ret) {
833 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
834 return IRQ_NONE;
835 }
836
837 count = data->msg_buf[0];
838
839 if (count == 0) {
840 dev_warn(dev, "Interrupt triggered but zero messages\n");
841 return IRQ_NONE;
842 } else if (count > data->max_reportid) {
843 dev_err(dev, "T44 count %d exceeded max report id\n", count);
844 count = data->max_reportid;
845 }
846
847 /* Process first message */
848 ret = mxt_proc_message(data, data->msg_buf + 1);
849 if (ret < 0) {
850 dev_warn(dev, "Unexpected invalid message\n");
851 return IRQ_NONE;
852 }
853
854 num_left = count - 1;
855
856 /* Process remaining messages if necessary */
857 if (num_left) {
858 ret = mxt_read_and_process_messages(data, num_left);
b9b05a89 859 if (ret < 0)
9d8dc3e5
ND		 860 goto end;
861 else if (ret != num_left)
862 dev_warn(dev, "Unexpected invalid message\n");
863 }
864
865end:
866 if (data->update_input) {
867 mxt_input_sync(data);
868 data->update_input = false;
869 }
870
871 return IRQ_HANDLED;
872}
873
874static int mxt_process_messages_until_invalid(struct mxt_data *data)
875{
876 struct device *dev = &data->client->dev;
877 int count, read;
878 u8 tries = 2;
879
880 count = data->max_reportid;
881
882 /* Read messages until we force an invalid */
883 do {
884 read = mxt_read_and_process_messages(data, count);
885 if (read < count)
886 return 0;
887 } while (--tries);
888
889 if (data->update_input) {
890 mxt_input_sync(data);
891 data->update_input = false;
892 }
893
894 dev_err(dev, "CHG pin isn't cleared\n");
895 return -EBUSY;
896}
897
898static irqreturn_t mxt_process_messages(struct mxt_data *data)
899{
900 int total_handled, num_handled;
901 u8 count = data->last_message_count;
902
903 if (count < 1 || count > data->max_reportid)
904 count = 1;
905
906 /* include final invalid message */
907 total_handled = mxt_read_and_process_messages(data, count + 1);
908 if (total_handled < 0)
909 return IRQ_NONE;
910 /* if there were invalid messages, then we are done */
911 else if (total_handled <= count)
912 goto update_count;
913
914 /* keep reading two msgs until one is invalid or reportid limit */
915 do {
916 num_handled = mxt_read_and_process_messages(data, 2);
917 if (num_handled < 0)
b9b05a89 918 return IRQ_NONE;
9d8dc3e5
ND		 919
920 total_handled += num_handled;
921
922 if (num_handled < 2)
923 break;
924 } while (total_handled < data->num_touchids);
925
926update_count:
927 data->last_message_count = total_handled;
b9b05a89
ND		 928
929 if (data->update_input) {
b735fbe0 930 mxt_input_sync(data);
b9b05a89
ND		 931 data->update_input = false;
932 }
64464ae8 933
4cf51c38
JS		 934 return IRQ_HANDLED;
935}
936
d79e7e47
BL		 937static irqreturn_t mxt_interrupt(int irq, void *dev_id)
938{
939 struct mxt_data *data = dev_id;
940
941 if (data->in_bootloader) {
942 /* bootloader state transition completion */
943 complete(&data->bl_completion);
944 return IRQ_HANDLED;
945 }
946
dd24dcf5
ND		 947 if (!data->object_table)
948 return IRQ_HANDLED;
949
9d8dc3e5
ND		 950 if (data->T44_address) {
951 return mxt_process_messages_t44(data);
952 } else {
953 return mxt_process_messages(data);
954 }
d79e7e47
BL		 955}
956
a4a2ef46
IV		 957static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
958 u8 value, bool wait)
959{
960 u16 reg;
961 u8 command_register;
962 int timeout_counter = 0;
963 int ret;
964
965 reg = data->T6_address + cmd_offset;
966
967 ret = mxt_write_reg(data->client, reg, value);
968 if (ret)
969 return ret;
970
971 if (!wait)
972 return 0;
973
974 do {
975 msleep(20);
976 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
977 if (ret)
978 return ret;
979 } while (command_register != 0 && timeout_counter++ <= 100);
980
981 if (timeout_counter > 100) {
982 dev_err(&data->client->dev, "Command failed!\n");
983 return -EIO;
984 }
985
986 return 0;
987}
988
989static int mxt_soft_reset(struct mxt_data *data)
990{
991 struct device *dev = &data->client->dev;
992 int ret = 0;
993
994 dev_info(dev, "Resetting chip\n");
995
996 reinit_completion(&data->reset_completion);
997
998 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
999 if (ret)
1000 return ret;
1001
1002 ret = mxt_wait_for_completion(data, &data->reset_completion,
1003 MXT_RESET_TIMEOUT);
1004 if (ret)
1005 return ret;
1006
1007 return 0;
1008}
1009
c3f78043
ND		 1010static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1011{
1012 /*
1013 * On failure, CRC is set to 0 and config will always be
1014 * downloaded.
1015 */
1016 data->config_crc = 0;
1017 reinit_completion(&data->crc_completion);
1018
1019 mxt_t6_command(data, cmd, value, true);
1020
1021 /*
1022 * Wait for crc message. On failure, CRC is set to 0 and config will
1023 * always be downloaded.
1024 */
1025 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1026}
1027
4ce6fa01
ND		 1028static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1029{
1030 static const unsigned int crcpoly = 0x80001B;
1031 u32 result;
1032 u32 data_word;
1033
1034 data_word = (secondbyte << 8) | firstbyte;
1035 result = ((*crc << 1) ^ data_word);
1036
1037 if (result & 0x1000000)
1038 result ^= crcpoly;
1039
1040 *crc = result;
1041}
1042
1043static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1044{
1045 u32 crc = 0;
1046 u8 *ptr = base + start_off;
1047 u8 *last_val = base + end_off - 1;
1048
1049 if (end_off < start_off)
1050 return -EINVAL;
1051
1052 while (ptr < last_val) {
1053 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1054 ptr += 2;
1055 }
1056
1057 /* if len is odd, fill the last byte with 0 */
1058 if (ptr == last_val)
1059 mxt_calc_crc24(&crc, *ptr, 0);
1060
1061 /* Mask to 24-bit */
1062 crc &= 0x00FFFFFF;
1063
1064 return crc;
1065}
1066
efdbd7ae
DT		 1067static int mxt_prepare_cfg_mem(struct mxt_data *data,
1068 const struct firmware *cfg,
1069 unsigned int data_pos,
1070 unsigned int cfg_start_ofs,
1071 u8 *config_mem,
1072 size_t config_mem_size)
1073{
1074 struct device *dev = &data->client->dev;
1075 struct mxt_object *object;
1076 unsigned int type, instance, size, byte_offset;
1077 int offset;
1078 int ret;
1079 int i;
1080 u16 reg;
1081 u8 val;
1082
1083 while (data_pos < cfg->size) {
1084 /* Read type, instance, length */
1085 ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
1086 &type, &instance, &size, &offset);
1087 if (ret == 0) {
1088 /* EOF */
1089 break;
1090 } else if (ret != 3) {
1091 dev_err(dev, "Bad format: failed to parse object\n");
1092 return -EINVAL;
1093 }
1094 data_pos += offset;
1095
1096 object = mxt_get_object(data, type);
1097 if (!object) {
1098 /* Skip object */
1099 for (i = 0; i < size; i++) {
1100 ret = sscanf(cfg->data + data_pos, "%hhx%n",
041fa159
DT		 1101 &val, &offset);
1102 if (ret != 1) {
1103 dev_err(dev, "Bad format in T%d at %d\n",
1104 type, i);
1105 return -EINVAL;
1106 }
efdbd7ae
DT		 1107 data_pos += offset;
1108 }
1109 continue;
1110 }
1111
1112 if (size > mxt_obj_size(object)) {
1113 /*
1114 * Either we are in fallback mode due to wrong
1115 * config or config from a later fw version,
1116 * or the file is corrupt or hand-edited.
1117 */
1118 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1119 size - mxt_obj_size(object), type);
1120 } else if (mxt_obj_size(object) > size) {
1121 /*
1122 * If firmware is upgraded, new bytes may be added to
1123 * end of objects. It is generally forward compatible
1124 * to zero these bytes - previous behaviour will be
1125 * retained. However this does invalidate the CRC and
1126 * will force fallback mode until the configuration is
1127 * updated. We warn here but do nothing else - the
1128 * malloc has zeroed the entire configuration.
1129 */
1130 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1131 mxt_obj_size(object) - size, type);
1132 }
1133
1134 if (instance >= mxt_obj_instances(object)) {
1135 dev_err(dev, "Object instances exceeded!\n");
1136 return -EINVAL;
1137 }
1138
1139 reg = object->start_address + mxt_obj_size(object) * instance;
1140
1141 for (i = 0; i < size; i++) {
1142 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1143 &val,
1144 &offset);
1145 if (ret != 1) {
041fa159
DT		 1146 dev_err(dev, "Bad format in T%d at %d\n",
1147 type, i);
efdbd7ae
DT		 1148 return -EINVAL;
1149 }
1150 data_pos += offset;
1151
1152 if (i > mxt_obj_size(object))
1153 continue;
1154
1155 byte_offset = reg + i - cfg_start_ofs;
1156
041fa159 1157 if (byte_offset >= 0 && byte_offset < config_mem_size) {
efdbd7ae
DT		 1158 *(config_mem + byte_offset) = val;
1159 } else {
1160 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1161 reg, object->type, byte_offset);
1162 return -EINVAL;
1163 }
1164 }
1165 }
1166
1167 return 0;
1168}
1169
1170static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
1171 u8 *config_mem, size_t config_mem_size)
1172{
1173 unsigned int byte_offset = 0;
1174 int error;
1175
1176 /* Write configuration as blocks */
1177 while (byte_offset < config_mem_size) {
1178 unsigned int size = config_mem_size - byte_offset;
1179
1180 if (size > MXT_MAX_BLOCK_WRITE)
1181 size = MXT_MAX_BLOCK_WRITE;
1182
1183 error = __mxt_write_reg(data->client,
1184 cfg_start + byte_offset,
1185 size, config_mem + byte_offset);
1186 if (error) {
1187 dev_err(&data->client->dev,
1188 "Config write error, ret=%d\n", error);
1189 return error;
1190 }
1191
1192 byte_offset += size;
1193 }
1194
1195 return 0;
1196}
1197
50a77c65
ND		 1198/*
1199 * mxt_update_cfg - download configuration to chip
1200 *
1201 * Atmel Raw Config File Format
1202 *
1203 * The first four lines of the raw config file contain:
1204 * 1) Version
1205 * 2) Chip ID Information (first 7 bytes of device memory)
1206 * 3) Chip Information Block 24-bit CRC Checksum
1207 * 4) Chip Configuration 24-bit CRC Checksum
1208 *
1209 * The rest of the file consists of one line per object instance:
1210 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1211 *
1212 * <TYPE> - 2-byte object type as hex
1213 * <INSTANCE> - 2-byte object instance number as hex
1214 * <SIZE> - 2-byte object size as hex
1215 * <CONTENTS> - array of <SIZE> 1-byte hex values
1216 */
1217static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
4cf51c38 1218{
4cf51c38 1219 struct device *dev = &data->client->dev;
50a77c65 1220 struct mxt_info cfg_info;
cf94bc09 1221 int ret;
50a77c65 1222 int offset;
4ce6fa01 1223 int data_pos;
50a77c65 1224 int i;
4ce6fa01
ND		 1225 int cfg_start_ofs;
1226 u32 info_crc, config_crc, calculated_crc;
1227 u8 *config_mem;
1228 size_t config_mem_size;
4cf51c38 1229
50a77c65
ND		 1230 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1231
1232 if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1233 dev_err(dev, "Unrecognised config file\n");
efdbd7ae 1234 return -EINVAL;
4cf51c38
JS		 1235 }
1236
4ce6fa01 1237 data_pos = strlen(MXT_CFG_MAGIC);
50a77c65
ND		 1238
1239 /* Load information block and check */
1240 for (i = 0; i < sizeof(struct mxt_info); i++) {
4ce6fa01 1241 ret = sscanf(cfg->data + data_pos, "%hhx%n",
50a77c65
ND		 1242 (unsigned char *)&cfg_info + i,
1243 &offset);
1244 if (ret != 1) {
1245 dev_err(dev, "Bad format\n");
efdbd7ae 1246 return -EINVAL;
50a77c65 1247 }
c3f78043 1248
4ce6fa01 1249 data_pos += offset;
c3f78043
ND		 1250 }
1251
50a77c65
ND		 1252 if (cfg_info.family_id != data->info.family_id) {
1253 dev_err(dev, "Family ID mismatch!\n");
efdbd7ae 1254 return -EINVAL;
50a77c65 1255 }
c3f78043 1256
50a77c65
ND		 1257 if (cfg_info.variant_id != data->info.variant_id) {
1258 dev_err(dev, "Variant ID mismatch!\n");
efdbd7ae 1259 return -EINVAL;
50a77c65 1260 }
4cf51c38 1261
4ce6fa01
ND		 1262 /* Read CRCs */
1263 ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
50a77c65
ND		 1264 if (ret != 1) {
1265 dev_err(dev, "Bad format: failed to parse Info CRC\n");
efdbd7ae 1266 return -EINVAL;
50a77c65 1267 }
4ce6fa01 1268 data_pos += offset;
50a77c65 1269
4ce6fa01 1270 ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
50a77c65
ND		 1271 if (ret != 1) {
1272 dev_err(dev, "Bad format: failed to parse Config CRC\n");
efdbd7ae 1273 return -EINVAL;
50a77c65 1274 }
4ce6fa01 1275 data_pos += offset;
50a77c65 1276
4ce6fa01
ND		 1277 /*
1278 * The Info Block CRC is calculated over mxt_info and the object
1279 * table. If it does not match then we are trying to load the
1280 * configuration from a different chip or firmware version, so
1281 * the configuration CRC is invalid anyway.
1282 */
1283 if (info_crc == data->info_crc) {
1284 if (config_crc == 0 || data->config_crc == 0) {
1285 dev_info(dev, "CRC zero, attempting to apply config\n");
1286 } else if (config_crc == data->config_crc) {
1287 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1288 data->config_crc);
efdbd7ae 1289 return 0;
4ce6fa01
ND		 1290 } else {
1291 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1292 data->config_crc, config_crc);
1293 }
1294 } else {
1295 dev_warn(dev,
1296 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1297 data->info_crc, info_crc);
50a77c65
ND		 1298 }
1299
4ce6fa01
ND		 1300 /* Malloc memory to store configuration */
1301 cfg_start_ofs = MXT_OBJECT_START +
1302 data->info.object_num * sizeof(struct mxt_object) +
1303 MXT_INFO_CHECKSUM_SIZE;
1304 config_mem_size = data->mem_size - cfg_start_ofs;
1305 config_mem = kzalloc(config_mem_size, GFP_KERNEL);
1306 if (!config_mem) {
1307 dev_err(dev, "Failed to allocate memory\n");
efdbd7ae 1308 return -ENOMEM;
4ce6fa01 1309 }
50a77c65 1310
efdbd7ae
DT		 1311 ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
1312 config_mem, config_mem_size);
1313 if (ret)
1314 goto release_mem;
50a77c65 1315
4ce6fa01
ND		 1316 /* Calculate crc of the received configs (not the raw config file) */
1317 if (data->T7_address < cfg_start_ofs) {
1318 dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
1319 data->T7_address, cfg_start_ofs);
1320 ret = 0;
1321 goto release_mem;
1322 }
50a77c65 1323
4ce6fa01
ND		 1324 calculated_crc = mxt_calculate_crc(config_mem,
1325 data->T7_address - cfg_start_ofs,
1326 config_mem_size);
1327
efdbd7ae 1328 if (config_crc > 0 && config_crc != calculated_crc)
4ce6fa01
ND		 1329 dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
1330 calculated_crc, config_crc);
1331
efdbd7ae
DT		 1332 ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
1333 config_mem, config_mem_size);
1334 if (ret)
1335 goto release_mem;
4cf51c38 1336
c3f78043
ND		 1337 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1338
1339 ret = mxt_soft_reset(data);
1340 if (ret)
4ce6fa01 1341 goto release_mem;
c3f78043
ND		 1342
1343 dev_info(dev, "Config successfully updated\n");
1344
4ce6fa01
ND		 1345release_mem:
1346 kfree(config_mem);
50a77c65 1347 return ret;
4cf51c38
JS		 1348}
1349
dd24dcf5
ND		 1350static int mxt_acquire_irq(struct mxt_data *data)
1351{
1352 int error;
1353
1354 enable_irq(data->irq);
1355
9d8dc3e5 1356 error = mxt_process_messages_until_invalid(data);
dd24dcf5
ND		 1357 if (error)
1358 return error;
1359
1360 return 0;
1361}
1362
7686b108 1363static int mxt_get_info(struct mxt_data *data)
4cf51c38
JS		 1364{
1365 struct i2c_client *client = data->client;
7686b108 1366 struct mxt_info *info = &data->info;
4cf51c38 1367 int error;
4cf51c38 1368
23003a84
DK		 1369 /* Read 7-byte info block starting at address 0 */
1370 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
4cf51c38
JS		 1371 if (error)
1372 return error;
4cf51c38
JS		 1373
1374 return 0;
1375}
1376
5f3f9bc2
ND		 1377static void mxt_free_object_table(struct mxt_data *data)
1378{
1379 input_unregister_device(data->input_dev);
1380 data->input_dev = NULL;
1381
1382 kfree(data->object_table);
1383 data->object_table = NULL;
1384 kfree(data->msg_buf);
1385 data->msg_buf = NULL;
b9b05a89 1386 data->T5_address = 0;
5f3f9bc2
ND		 1387 data->T5_msg_size = 0;
1388 data->T6_reportid = 0;
1389 data->T7_address = 0;
1390 data->T9_reportid_min = 0;
1391 data->T9_reportid_max = 0;
1392 data->T19_reportid = 0;
9d8dc3e5
ND		 1393 data->T44_address = 0;
1394 data->max_reportid = 0;
5f3f9bc2
ND		 1395}
1396
7686b108 1397static int mxt_get_object_table(struct mxt_data *data)
4cf51c38 1398{
333e5a9a
DK		 1399 struct i2c_client *client = data->client;
1400 size_t table_size;
dd24dcf5 1401 struct mxt_object *object_table;
4cf51c38
JS		 1402 int error;
1403 int i;
333e5a9a 1404 u8 reportid;
4ce6fa01 1405 u16 end_address;
333e5a9a
DK		 1406
1407 table_size = data->info.object_num * sizeof(struct mxt_object);
dd24dcf5
ND		 1408 object_table = kzalloc(table_size, GFP_KERNEL);
1409 if (!object_table) {
1410 dev_err(&data->client->dev, "Failed to allocate memory\n");
1411 return -ENOMEM;
1412 }
1413
333e5a9a 1414 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
dd24dcf5
ND		 1415 object_table);
1416 if (error) {
1417 kfree(object_table);
333e5a9a 1418 return error;
dd24dcf5 1419 }
4cf51c38 1420
333e5a9a
DK		 1421 /* Valid Report IDs start counting from 1 */
1422 reportid = 1;
4ce6fa01 1423 data->mem_size = 0;
4cf51c38 1424 for (i = 0; i < data->info.object_num; i++) {
dd24dcf5 1425 struct mxt_object *object = object_table + i;
333e5a9a 1426 u8 min_id, max_id;
4cf51c38 1427
333e5a9a 1428 le16_to_cpus(&object->start_address);
4cf51c38
JS		 1429
1430 if (object->num_report_ids) {
333e5a9a 1431 min_id = reportid;
4cf51c38 1432 reportid += object->num_report_ids *
1e0c0c5b 1433 mxt_obj_instances(object);
333e5a9a
DK		 1434 max_id = reportid - 1;
1435 } else {
1436 min_id = 0;
1437 max_id = 0;
1438 }
1439
1440 dev_dbg(&data->client->dev,
7bed6805 1441 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1e0c0c5b
DK		 1442 object->type, object->start_address,
1443 mxt_obj_size(object), mxt_obj_instances(object),
1444 min_id, max_id);
333e5a9a
DK		 1445
1446 switch (object->type) {
5f3f9bc2 1447 case MXT_GEN_MESSAGE_T5:
437d4f37
ND		 1448 if (data->info.family_id == 0x80 &&
1449 data->info.version < 0x20) {
9d8dc3e5 1450 /*
437d4f37
ND		 1451 * On mXT224 firmware versions prior to V2.0
1452 * read and discard unused CRC byte otherwise
1453 * DMA reads are misaligned.
9d8dc3e5
ND		 1454 */
1455 data->T5_msg_size = mxt_obj_size(object);
1456 } else {
1457 /* CRC not enabled, so skip last byte */
1458 data->T5_msg_size = mxt_obj_size(object) - 1;
1459 }
b9b05a89 1460 data->T5_address = object->start_address;
041fa159 1461 break;
fdf80421
DK		 1462 case MXT_GEN_COMMAND_T6:
1463 data->T6_reportid = min_id;
a4a2ef46 1464 data->T6_address = object->start_address;
fdf80421 1465 break;
4ce6fa01
ND		 1466 case MXT_GEN_POWER_T7:
1467 data->T7_address = object->start_address;
1468 break;
333e5a9a
DK		 1469 case MXT_TOUCH_MULTI_T9:
1470 data->T9_reportid_min = min_id;
1471 data->T9_reportid_max = max_id;
9d8dc3e5
ND		 1472 data->num_touchids = object->num_report_ids
1473 * mxt_obj_instances(object);
1474 break;
1475 case MXT_SPT_MESSAGECOUNT_T44:
1476 data->T44_address = object->start_address;
333e5a9a 1477 break;
22dfab7f
DK		 1478 case MXT_SPT_GPIOPWM_T19:
1479 data->T19_reportid = min_id;
1480 break;
4cf51c38 1481 }
4ce6fa01
ND		 1482
1483 end_address = object->start_address
1484 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1485
1486 if (end_address >= data->mem_size)
1487 data->mem_size = end_address + 1;
4cf51c38
JS		 1488 }
1489
9d8dc3e5
ND		 1490 /* Store maximum reportid */
1491 data->max_reportid = reportid;
1492
1493 /* If T44 exists, T5 position has to be directly after */
1494 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1495 dev_err(&client->dev, "Invalid T44 position\n");
1496 error = -EINVAL;
1497 goto free_object_table;
1498 }
1499
1500 data->msg_buf = kcalloc(data->max_reportid,
1501 data->T5_msg_size, GFP_KERNEL);
5f3f9bc2
ND		 1502 if (!data->msg_buf) {
1503 dev_err(&client->dev, "Failed to allocate message buffer\n");
1504 error = -ENOMEM;
1505 goto free_object_table;
1506 }
1507
dd24dcf5
ND		 1508 data->object_table = object_table;
1509
4cf51c38 1510 return 0;
4cf51c38 1511
5f3f9bc2
ND		 1512free_object_table:
1513 mxt_free_object_table(data);
1514 return error;
7d4fa100
DK		 1515}
1516
61dc1aba
ND		 1517static int mxt_read_t9_resolution(struct mxt_data *data)
1518{
1519 struct i2c_client *client = data->client;
1520 int error;
1521 struct t9_range range;
1522 unsigned char orient;
1523 struct mxt_object *object;
1524
1525 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1526 if (!object)
1527 return -EINVAL;
1528
1529 error = __mxt_read_reg(client,
1530 object->start_address + MXT_T9_RANGE,
1531 sizeof(range), &range);
1532 if (error)
1533 return error;
1534
1535 le16_to_cpus(&range.x);
1536 le16_to_cpus(&range.y);
1537
1538 error = __mxt_read_reg(client,
1539 object->start_address + MXT_T9_ORIENT,
1540 1, &orient);
1541 if (error)
1542 return error;
1543
1544 /* Handle default values */
1545 if (range.x == 0)
1546 range.x = 1023;
1547
1548 if (range.y == 0)
1549 range.y = 1023;
1550
f3889ed1 1551 if (orient & MXT_T9_ORIENT_SWITCH) {
61dc1aba
ND		 1552 data->max_x = range.y;
1553 data->max_y = range.x;
1554 } else {
1555 data->max_x = range.x;
1556 data->max_y = range.y;
1557 }
1558
1559 dev_dbg(&client->dev,
1560 "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1561
1562 return 0;
1563}
1564
7a53d609
ND		 1565static int mxt_input_open(struct input_dev *dev);
1566static void mxt_input_close(struct input_dev *dev);
1567
1568static int mxt_initialize_t9_input_device(struct mxt_data *data)
1569{
1570 struct device *dev = &data->client->dev;
1571 const struct mxt_platform_data *pdata = data->pdata;
1572 struct input_dev *input_dev;
1573 int error;
1574 unsigned int num_mt_slots;
1575 unsigned int mt_flags = 0;
1576 int i;
1577
1578 error = mxt_read_t9_resolution(data);
1579 if (error)
1580 dev_warn(dev, "Failed to initialize T9 resolution\n");
1581
1582 input_dev = input_allocate_device();
1583 if (!input_dev) {
1584 dev_err(dev, "Failed to allocate memory\n");
1585 return -ENOMEM;
1586 }
1587
1588 input_dev->name = "Atmel maXTouch Touchscreen";
1589 input_dev->phys = data->phys;
1590 input_dev->id.bustype = BUS_I2C;
1591 input_dev->dev.parent = dev;
1592 input_dev->open = mxt_input_open;
1593 input_dev->close = mxt_input_close;
1594
1595 __set_bit(EV_ABS, input_dev->evbit);
1596 __set_bit(EV_KEY, input_dev->evbit);
1597 __set_bit(BTN_TOUCH, input_dev->keybit);
1598
1599 if (pdata->t19_num_keys) {
1600 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1601
1602 for (i = 0; i < pdata->t19_num_keys; i++)
1603 if (pdata->t19_keymap[i] != KEY_RESERVED)
1604 input_set_capability(input_dev, EV_KEY,
1605 pdata->t19_keymap[i]);
1606
1607 mt_flags |= INPUT_MT_POINTER;
1608
1609 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1610 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1611 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1612 MXT_PIXELS_PER_MM);
1613 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1614 MXT_PIXELS_PER_MM);
1615
1616 input_dev->name = "Atmel maXTouch Touchpad";
1617 }
1618
1619 /* For single touch */
1620 input_set_abs_params(input_dev, ABS_X,
1621 0, data->max_x, 0, 0);
1622 input_set_abs_params(input_dev, ABS_Y,
1623 0, data->max_y, 0, 0);
1624 input_set_abs_params(input_dev, ABS_PRESSURE,
1625 0, 255, 0, 0);
1626
1627 /* For multi touch */
1628 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1629 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1630 if (error) {
1631 dev_err(dev, "Error %d initialising slots\n", error);
1632 goto err_free_mem;
1633 }
1634
1635 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1636 0, MXT_MAX_AREA, 0, 0);
1637 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1638 0, data->max_x, 0, 0);
1639 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1640 0, data->max_y, 0, 0);
1641 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1642 0, 255, 0, 0);
1643
1644 input_set_drvdata(input_dev, data);
1645
1646 error = input_register_device(input_dev);
1647 if (error) {
1648 dev_err(dev, "Error %d registering input device\n", error);
1649 goto err_free_mem;
1650 }
1651
1652 data->input_dev = input_dev;
1653
1654 return 0;
1655
1656err_free_mem:
1657 input_free_device(input_dev);
1658 return error;
1659}
1660
50a77c65
ND		 1661static int mxt_configure_objects(struct mxt_data *data,
1662 const struct firmware *cfg);
1663
1664static void mxt_config_cb(const struct firmware *cfg, void *ctx)
1665{
1666 mxt_configure_objects(ctx, cfg);
efdbd7ae 1667 release_firmware(cfg);
50a77c65
ND		 1668}
1669
7686b108 1670static int mxt_initialize(struct mxt_data *data)
4cf51c38
JS		 1671{
1672 struct i2c_client *client = data->client;
6cd1ab0f 1673 int recovery_attempts = 0;
4cf51c38 1674 int error;
4cf51c38 1675
6cd1ab0f
DT		 1676 while (1) {
1677 error = mxt_get_info(data);
1678 if (!error)
1679 break;
1680
1681 /* Check bootloader state */
1682 error = mxt_probe_bootloader(data, false);
8efaa5e5 1683 if (error) {
6cd1ab0f
DT		 1684 dev_info(&client->dev, "Trying alternate bootloader address\n");
1685 error = mxt_probe_bootloader(data, true);
1686 if (error) {
8efaa5e5
ND		 1687 /* Chip is not in appmode or bootloader mode */
1688 return error;
1689 }
6cd1ab0f 1690 }
a9fdd1e6 1691
6cd1ab0f
DT		 1692 /* OK, we are in bootloader, see if we can recover */
1693 if (++recovery_attempts > 1) {
1694 dev_err(&client->dev, "Could not recover from bootloader mode\n");
1695 /*
1696 * We can reflash from this state, so do not
1697 * abort initialization.
1698 */
1699 data->in_bootloader = true;
1700 return 0;
8efaa5e5 1701 }
6cd1ab0f
DT		 1702
1703 /* Attempt to exit bootloader into app mode */
1704 mxt_send_bootloader_cmd(data, false);
1705 msleep(MXT_FW_RESET_TIME);
a9fdd1e6 1706 }
4cf51c38 1707
4cf51c38 1708 /* Get object table information */
7686b108 1709 error = mxt_get_object_table(data);
7bed6805
ND		 1710 if (error) {
1711 dev_err(&client->dev, "Error %d reading object table\n", error);
dd24dcf5 1712 return error;
7bed6805 1713 }
4cf51c38 1714
041fa159 1715 error = mxt_acquire_irq(data);
dd24dcf5
ND		 1716 if (error)
1717 goto err_free_object_table;
1718
6cd1ab0f
DT		 1719 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
1720 &client->dev, GFP_KERNEL, data,
1721 mxt_config_cb);
1722 if (error) {
1723 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
1724 error);
1725 goto err_free_object_table;
1726 }
50a77c65
ND		 1727
1728 return 0;
1729
1730err_free_object_table:
1731 mxt_free_object_table(data);
1732 return error;
1733}
1734
9d469d03
ND		 1735static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
1736{
1737 struct device *dev = &data->client->dev;
1738 int error;
1739 struct t7_config *new_config;
1740 struct t7_config deepsleep = { .active = 0, .idle = 0 };
1741
1742 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
1743 new_config = &deepsleep;
1744 else
1745 new_config = &data->t7_cfg;
1746
1747 error = __mxt_write_reg(data->client, data->T7_address,
1748 sizeof(data->t7_cfg), new_config);
1749 if (error)
1750 return error;
1751
1752 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
1753 new_config->active, new_config->idle);
1754
1755 return 0;
1756}
1757
1758static int mxt_init_t7_power_cfg(struct mxt_data *data)
1759{
1760 struct device *dev = &data->client->dev;
1761 int error;
1762 bool retry = false;
1763
1764recheck:
1765 error = __mxt_read_reg(data->client, data->T7_address,
1766 sizeof(data->t7_cfg), &data->t7_cfg);
1767 if (error)
1768 return error;
1769
1770 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
1771 if (!retry) {
1772 dev_dbg(dev, "T7 cfg zero, resetting\n");
1773 mxt_soft_reset(data);
1774 retry = true;
1775 goto recheck;
1776 } else {
1777 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
1778 data->t7_cfg.active = 20;
1779 data->t7_cfg.idle = 100;
1780 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
1781 }
1782 }
1783
1784 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
1785 data->t7_cfg.active, data->t7_cfg.idle);
1786 return 0;
1787}
1788
50a77c65
ND		 1789static int mxt_configure_objects(struct mxt_data *data,
1790 const struct firmware *cfg)
1791{
1792 struct device *dev = &data->client->dev;
1793 struct mxt_info *info = &data->info;
1794 int error;
1795
1796 if (cfg) {
1797 error = mxt_update_cfg(data, cfg);
1798 if (error)
1799 dev_warn(dev, "Error %d updating config\n", error);
7bed6805 1800 }
4cf51c38 1801
9d469d03
ND		 1802 error = mxt_init_t7_power_cfg(data);
1803 if (error) {
1804 dev_err(dev, "Failed to initialize power cfg\n");
1805 return error;
1806 }
1807
7a53d609
ND		 1808 error = mxt_initialize_t9_input_device(data);
1809 if (error)
50a77c65 1810 return error;
4cf51c38 1811
50a77c65 1812 dev_info(dev,
61dc1aba
ND		 1813 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
1814 info->family_id, info->variant_id, info->version >> 4,
1815 info->version & 0xf, info->build, info->object_num);
4cf51c38
JS		 1816
1817 return 0;
1818}
1819
b19fc9ec
DK		 1820/* Firmware Version is returned as Major.Minor.Build */
1821static ssize_t mxt_fw_version_show(struct device *dev,
1822 struct device_attribute *attr, char *buf)
1823{
1824 struct mxt_data *data = dev_get_drvdata(dev);
1825 struct mxt_info *info = &data->info;
1826 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
1827 info->version >> 4, info->version & 0xf, info->build);
1828}
1829
1830/* Hardware Version is returned as FamilyID.VariantID */
1831static ssize_t mxt_hw_version_show(struct device *dev,
1832 struct device_attribute *attr, char *buf)
1833{
1834 struct mxt_data *data = dev_get_drvdata(dev);
1835 struct mxt_info *info = &data->info;
1836 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
1837 info->family_id, info->variant_id);
1838}
1839
794eb67e
DK		 1840static ssize_t mxt_show_instance(char *buf, int count,
1841 struct mxt_object *object, int instance,
1842 const u8 *val)
1843{
1844 int i;
1845
1e0c0c5b 1846 if (mxt_obj_instances(object) > 1)
794eb67e
DK		 1847 count += scnprintf(buf + count, PAGE_SIZE - count,
1848 "Instance %u\n", instance);
1849
1e0c0c5b 1850 for (i = 0; i < mxt_obj_size(object); i++)
794eb67e
DK		 1851 count += scnprintf(buf + count, PAGE_SIZE - count,
1852 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
1853 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
1854
1855 return count;
1856}
1857
7686b108 1858static ssize_t mxt_object_show(struct device *dev,
4cf51c38
JS		 1859 struct device_attribute *attr, char *buf)
1860{
7686b108
IV		 1861 struct mxt_data *data = dev_get_drvdata(dev);
1862 struct mxt_object *object;
4cf51c38
JS		 1863 int count = 0;
1864 int i, j;
1865 int error;
43a91d51 1866 u8 *obuf;
4cf51c38 1867
43a91d51
DK		 1868 /* Pre-allocate buffer large enough to hold max sized object. */
1869 obuf = kmalloc(256, GFP_KERNEL);
1870 if (!obuf)
1871 return -ENOMEM;
4cf51c38 1872
43a91d51 1873 error = 0;
4cf51c38
JS		 1874 for (i = 0; i < data->info.object_num; i++) {
1875 object = data->object_table + i;
1876
91630955 1877 if (!mxt_object_readable(object->type))
4cf51c38 1878 continue;
4cf51c38 1879
91630955
DK		 1880 count += scnprintf(buf + count, PAGE_SIZE - count,
1881 "T%u:\n", object->type);
4cf51c38 1882
1e0c0c5b
DK		 1883 for (j = 0; j < mxt_obj_instances(object); j++) {
1884 u16 size = mxt_obj_size(object);
794eb67e 1885 u16 addr = object->start_address + j * size;
43a91d51 1886
794eb67e 1887 error = __mxt_read_reg(data->client, addr, size, obuf);
4cf51c38 1888 if (error)
794eb67e 1889 goto done;
4cf51c38 1890
794eb67e 1891 count = mxt_show_instance(buf, count, object, j, obuf);
4cf51c38 1892 }
4cf51c38
JS		 1893 }
1894
794eb67e 1895done:
43a91d51
DK		 1896 kfree(obuf);
1897 return error ?: count;
4cf51c38
JS		 1898}
1899
f2ac6cb9
ND		 1900static int mxt_check_firmware_format(struct device *dev,
1901 const struct firmware *fw)
1902{
1903 unsigned int pos = 0;
1904 char c;
1905
1906 while (pos < fw->size) {
1907 c = *(fw->data + pos);
1908
1909 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
1910 return 0;
1911
1912 pos++;
1913 }
1914
1915 /*
1916 * To convert file try:
1917 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
1918 */
1919 dev_err(dev, "Aborting: firmware file must be in binary format\n");
1920
1921 return -EINVAL;
1922}
1923
7686b108 1924static int mxt_load_fw(struct device *dev, const char *fn)
4cf51c38 1925{
7686b108 1926 struct mxt_data *data = dev_get_drvdata(dev);
4cf51c38
JS		 1927 const struct firmware *fw = NULL;
1928 unsigned int frame_size;
1929 unsigned int pos = 0;
f943c74a 1930 unsigned int retry = 0;
f477c758 1931 unsigned int frame = 0;
4cf51c38
JS		 1932 int ret;
1933
1934 ret = request_firmware(&fw, fn, dev);
1935 if (ret) {
1936 dev_err(dev, "Unable to open firmware %s\n", fn);
1937 return ret;
1938 }
1939
f2ac6cb9
ND		 1940 /* Check for incorrect enc file */
1941 ret = mxt_check_firmware_format(dev, fw);
1942 if (ret)
1943 goto release_firmware;
1944
a9fdd1e6
ND		 1945 if (!data->in_bootloader) {
1946 /* Change to the bootloader mode */
1947 data->in_bootloader = true;
d79e7e47 1948
a9fdd1e6
ND		 1949 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
1950 MXT_BOOT_VALUE, false);
1951 if (ret)
1952 goto release_firmware;
a4a2ef46 1953
a9fdd1e6 1954 msleep(MXT_RESET_TIME);
8efaa5e5
ND		 1955
1956 /* Do not need to scan since we know family ID */
1957 ret = mxt_lookup_bootloader_address(data, 0);
1958 if (ret)
1959 goto release_firmware;
1960 } else {
1961 enable_irq(data->irq);
a9fdd1e6 1962 }
4cf51c38 1963
a9fdd1e6 1964 mxt_free_object_table(data);
d79e7e47
BL		 1965 reinit_completion(&data->bl_completion);
1966
385deb96
ND		 1967 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
1968 if (ret) {
1969 /* Bootloader may still be unlocked from previous attempt */
1970 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
1971 if (ret)
1972 goto disable_irq;
1973 } else {
1974 dev_info(dev, "Unlocking bootloader\n");
4cf51c38 1975
385deb96 1976 /* Unlock bootloader */
8efaa5e5 1977 ret = mxt_send_bootloader_cmd(data, true);
385deb96
ND		 1978 if (ret)
1979 goto disable_irq;
1980 }
4cf51c38
JS		 1981
1982 while (pos < fw->size) {
385deb96 1983 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
4cf51c38 1984 if (ret)
d79e7e47 1985 goto disable_irq;
4cf51c38
JS		 1986
1987 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
1988
f943c74a 1989 /* Take account of CRC bytes */
4cf51c38
JS		 1990 frame_size += 2;
1991
1992 /* Write one frame to device */
f28a842d
ND		 1993 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
1994 if (ret)
1995 goto disable_irq;
4cf51c38 1996
385deb96 1997 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
f943c74a
ND		 1998 if (ret) {
1999 retry++;
2000
2001 /* Back off by 20ms per retry */
2002 msleep(retry * 20);
4cf51c38 2003
f943c74a
ND		 2004 if (retry > 20) {
2005 dev_err(dev, "Retry count exceeded\n");
2006 goto disable_irq;
2007 }
2008 } else {
2009 retry = 0;
2010 pos += frame_size;
f477c758 2011 frame++;
f943c74a 2012 }
4cf51c38 2013
f477c758
ND		 2014 if (frame % 50 == 0)
2015 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2016 frame, pos, fw->size);
4cf51c38
JS		 2017 }
2018
a0434b75 2019 /* Wait for flash. */
a4a2ef46
IV		 2020 ret = mxt_wait_for_completion(data, &data->bl_completion,
2021 MXT_FW_RESET_TIME);
a0434b75
BL		 2022 if (ret)
2023 goto disable_irq;
2024
f477c758
ND		 2025 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2026
a0434b75
BL		 2027 /*
2028 * Wait for device to reset. Some bootloader versions do not assert
2029 * the CHG line after bootloading has finished, so ignore potential
2030 * errors.
2031 */
a4a2ef46 2032 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
a0434b75 2033
d79e7e47
BL		 2034 data->in_bootloader = false;
2035
2036disable_irq:
2037 disable_irq(data->irq);
a4a2ef46 2038release_firmware:
4cf51c38 2039 release_firmware(fw);
4cf51c38
JS		 2040 return ret;
2041}
2042
7686b108 2043static ssize_t mxt_update_fw_store(struct device *dev,
4cf51c38
JS		 2044 struct device_attribute *attr,
2045 const char *buf, size_t count)
2046{
7686b108 2047 struct mxt_data *data = dev_get_drvdata(dev);
4cf51c38
JS		 2048 int error;
2049
7686b108 2050 error = mxt_load_fw(dev, MXT_FW_NAME);
4cf51c38
JS		 2051 if (error) {
2052 dev_err(dev, "The firmware update failed(%d)\n", error);
2053 count = error;
2054 } else {
7bed6805
ND		 2055 dev_info(dev, "The firmware update succeeded\n");
2056
dd24dcf5 2057 error = mxt_initialize(data);
d79e7e47
BL		 2058 if (error)
2059 return error;
2060 }
08960a07 2061
4cf51c38
JS		 2062 return count;
2063}
2064
b19fc9ec
DK		 2065static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2066static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
71b3e938
DK		 2067static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2068static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
4cf51c38 2069
7686b108 2070static struct attribute *mxt_attrs[] = {
b19fc9ec
DK		 2071 &dev_attr_fw_version.attr,
2072 &dev_attr_hw_version.attr,
4cf51c38
JS		 2073 &dev_attr_object.attr,
2074 &dev_attr_update_fw.attr,
2075 NULL
2076};
2077
7686b108
IV		 2078static const struct attribute_group mxt_attr_group = {
2079 .attrs = mxt_attrs,
4cf51c38
JS		 2080};
2081
7686b108 2082static void mxt_start(struct mxt_data *data)
4cf51c38 2083{
9d469d03
ND		 2084 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2085
2086 /* Recalibrate since chip has been in deep sleep */
2087 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
4cf51c38
JS		 2088}
2089
7686b108 2090static void mxt_stop(struct mxt_data *data)
4cf51c38 2091{
9d469d03 2092 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
4cf51c38
JS		 2093}
2094
7686b108 2095static int mxt_input_open(struct input_dev *dev)
4cf51c38 2096{
7686b108 2097 struct mxt_data *data = input_get_drvdata(dev);
4cf51c38 2098
7686b108 2099 mxt_start(data);
4cf51c38
JS		 2100
2101 return 0;
2102}
2103
7686b108 2104static void mxt_input_close(struct input_dev *dev)
4cf51c38 2105{
7686b108 2106 struct mxt_data *data = input_get_drvdata(dev);
4cf51c38 2107
7686b108 2108 mxt_stop(data);
4cf51c38
JS		 2109}
2110
78188be3
SW		 2111#ifdef CONFIG_OF
2112static struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2113{
2114 struct mxt_platform_data *pdata;
2115 u32 *keymap;
2116 u32 keycode;
2117 int proplen, i, ret;
2118
2119 if (!client->dev.of_node)
2120 return ERR_PTR(-ENODEV);
2121
2122 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
2123 if (!pdata)
2124 return ERR_PTR(-ENOMEM);
2125
2126 if (of_find_property(client->dev.of_node, "linux,gpio-keymap",
2127 &proplen)) {
2128 pdata->t19_num_keys = proplen / sizeof(u32);
2129
2130 keymap = devm_kzalloc(&client->dev,
2131 pdata->t19_num_keys * sizeof(keymap[0]),
2132 GFP_KERNEL);
2133 if (!keymap)
2134 return ERR_PTR(-ENOMEM);
2135
2136 for (i = 0; i < pdata->t19_num_keys; i++) {
2137 ret = of_property_read_u32_index(client->dev.of_node,
2138 "linux,gpio-keymap", i, &keycode);
2139 if (ret)
2140 keycode = KEY_RESERVED;
2141
2142 keymap[i] = keycode;
2143 }
2144
2145 pdata->t19_keymap = keymap;
2146 }
2147
2148 return pdata;
2149}
2150#else
2151static struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2152{
2153 dev_dbg(&client->dev, "No platform data specified\n");
2154 return ERR_PTR(-EINVAL);
2155}
2156#endif
2157
2158static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
4cf51c38 2159{
7686b108 2160 struct mxt_data *data;
78188be3 2161 const struct mxt_platform_data *pdata;
4cf51c38
JS		 2162 int error;
2163
78188be3
SW		 2164 pdata = dev_get_platdata(&client->dev);
2165 if (!pdata) {
2166 pdata = mxt_parse_dt(client);
2167 if (IS_ERR(pdata))
2168 return PTR_ERR(pdata);
2169 }
4cf51c38 2170
7686b108 2171 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
7a53d609 2172 if (!data) {
4cf51c38 2173 dev_err(&client->dev, "Failed to allocate memory\n");
7a53d609 2174 return -ENOMEM;
4cf51c38
JS		 2175 }
2176
ec02ac2b
DK		 2177 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
2178 client->adapter->nr, client->addr);
22dfab7f 2179
910d8051 2180 data->client = client;
910d8051
JS		 2181 data->pdata = pdata;
2182 data->irq = client->irq;
7a53d609 2183 i2c_set_clientdata(client, data);
910d8051 2184
d79e7e47 2185 init_completion(&data->bl_completion);
a4a2ef46 2186 init_completion(&data->reset_completion);
c3f78043 2187 init_completion(&data->crc_completion);
d79e7e47 2188
dd24dcf5
ND		 2189 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
2190 pdata->irqflags | IRQF_ONESHOT,
2191 client->name, data);
2192 if (error) {
2193 dev_err(&client->dev, "Failed to register interrupt\n");
2194 goto err_free_mem;
2195 }
2196
2197 disable_irq(client->irq);
2198
cb159115
DK		 2199 error = mxt_initialize(data);
2200 if (error)
7a53d609 2201 goto err_free_irq;
4cf51c38 2202
7686b108 2203 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
7bed6805
ND		 2204 if (error) {
2205 dev_err(&client->dev, "Failure %d creating sysfs group\n",
2206 error);
7a53d609 2207 goto err_free_object;
7bed6805 2208 }
4cf51c38
JS		 2209
2210 return 0;
2211
4cf51c38 2212err_free_object:
5f3f9bc2 2213 mxt_free_object_table(data);
dd24dcf5
ND		 2214err_free_irq:
2215 free_irq(client->irq, data);
4cf51c38 2216err_free_mem:
4cf51c38
JS		 2217 kfree(data);
2218 return error;
2219}
2220
e2619cf7 2221static int mxt_remove(struct i2c_client *client)
4cf51c38 2222{
7686b108 2223 struct mxt_data *data = i2c_get_clientdata(client);
4cf51c38 2224
7686b108 2225 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
4cf51c38
JS		 2226 free_irq(data->irq, data);
2227 input_unregister_device(data->input_dev);
5f3f9bc2 2228 mxt_free_object_table(data);
4cf51c38
JS		 2229 kfree(data);
2230
2231 return 0;
2232}
2233
3a73c816 2234#ifdef CONFIG_PM_SLEEP
7686b108 2235static int mxt_suspend(struct device *dev)
4cf51c38 2236{
8b5fce06 2237 struct i2c_client *client = to_i2c_client(dev);
7686b108 2238 struct mxt_data *data = i2c_get_clientdata(client);
4cf51c38
JS		 2239 struct input_dev *input_dev = data->input_dev;
2240
2241 mutex_lock(&input_dev->mutex);
2242
2243 if (input_dev->users)
7686b108 2244 mxt_stop(data);
4cf51c38
JS		 2245
2246 mutex_unlock(&input_dev->mutex);
2247
2248 return 0;
2249}
2250
7686b108 2251static int mxt_resume(struct device *dev)
4cf51c38 2252{
8b5fce06 2253 struct i2c_client *client = to_i2c_client(dev);
7686b108 2254 struct mxt_data *data = i2c_get_clientdata(client);
4cf51c38
JS		 2255 struct input_dev *input_dev = data->input_dev;
2256
4cf51c38
JS		 2257 mutex_lock(&input_dev->mutex);
2258
2259 if (input_dev->users)
7686b108 2260 mxt_start(data);
4cf51c38
JS		 2261
2262 mutex_unlock(&input_dev->mutex);
2263
2264 return 0;
2265}
4cf51c38
JS		 2266#endif
2267
3a73c816
DK		 2268static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
2269
78188be3
SW		 2270static const struct of_device_id mxt_of_match[] = {
2271 { .compatible = "atmel,maxtouch", },
2272 {},
2273};
2274MODULE_DEVICE_TABLE(of, mxt_of_match);
2275
7686b108 2276static const struct i2c_device_id mxt_id[] = {
4cf51c38 2277 { "qt602240_ts", 0 },
7686b108 2278 { "atmel_mxt_ts", 0 },
22dfab7f 2279 { "atmel_mxt_tp", 0 },
46ee2a05 2280 { "mXT224", 0 },
4cf51c38
JS		 2281 { }
2282};
7686b108 2283MODULE_DEVICE_TABLE(i2c, mxt_id);
4cf51c38 2284
7686b108 2285static struct i2c_driver mxt_driver = {
4cf51c38 2286 .driver = {
7686b108 2287 .name = "atmel_mxt_ts",
4cf51c38 2288 .owner = THIS_MODULE,
78188be3 2289 .of_match_table = of_match_ptr(mxt_of_match),
7686b108 2290 .pm = &mxt_pm_ops,
4cf51c38 2291 },
7686b108 2292 .probe = mxt_probe,
1cb0aa88 2293 .remove = mxt_remove,
7686b108 2294 .id_table = mxt_id,
4cf51c38
JS		 2295};
2296
1b92c1cf 2297module_i2c_driver(mxt_driver);
4cf51c38
JS		 2298
2299/* Module information */
2300MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
7686b108 2301MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
4cf51c38 2302MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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