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Input: atmel_mxt_ts - disable interrupt for 50ms after reset
[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
4f8d8088
DT		 17#include <linux/acpi.h>
18#include <linux/dmi.h>
4cf51c38 19#include <linux/module.h>
d79e7e47
BL		 20#include <linux/init.h>
21#include <linux/completion.h>
4cf51c38
JS		 22#include <linux/delay.h>
23#include <linux/firmware.h>
24#include <linux/i2c.h>
7f3884f7 25#include <linux/platform_data/atmel_mxt_ts.h>
8b86c1c2 26#include <linux/input/mt.h>
4cf51c38 27#include <linux/interrupt.h>
78188be3 28#include <linux/of.h>
4cf51c38 29#include <linux/slab.h>
b23157dc 30#include <asm/unaligned.h>
4cf51c38 31
50a77c65 32/* Firmware files */
7686b108 33#define MXT_FW_NAME "maxtouch.fw"
50a77c65
ND		 34#define MXT_CFG_NAME "maxtouch.cfg"
35#define MXT_CFG_MAGIC "OBP_RAW V1"
4cf51c38
JS		 36
37/* Registers */
7686b108 38#define MXT_OBJECT_START 0x07
7686b108 39#define MXT_OBJECT_SIZE 6
4ce6fa01
ND		 40#define MXT_INFO_CHECKSUM_SIZE 3
41#define MXT_MAX_BLOCK_WRITE 256
4cf51c38
JS		 42
43/* Object types */
81c88a71
IV		 44#define MXT_DEBUG_DIAGNOSTIC_T37 37
45#define MXT_GEN_MESSAGE_T5 5
46#define MXT_GEN_COMMAND_T6 6
47#define MXT_GEN_POWER_T7 7
48#define MXT_GEN_ACQUIRE_T8 8
49#define MXT_GEN_DATASOURCE_T53 53
50#define MXT_TOUCH_MULTI_T9 9
51#define MXT_TOUCH_KEYARRAY_T15 15
52#define MXT_TOUCH_PROXIMITY_T23 23
53#define MXT_TOUCH_PROXKEY_T52 52
54#define MXT_PROCI_GRIPFACE_T20 20
55#define MXT_PROCG_NOISE_T22 22
56#define MXT_PROCI_ONETOUCH_T24 24
57#define MXT_PROCI_TWOTOUCH_T27 27
58#define MXT_PROCI_GRIP_T40 40
59#define MXT_PROCI_PALM_T41 41
60#define MXT_PROCI_TOUCHSUPPRESSION_T42 42
61#define MXT_PROCI_STYLUS_T47 47
62#define MXT_PROCG_NOISESUPPRESSION_T48 48
63#define MXT_SPT_COMMSCONFIG_T18 18
64#define MXT_SPT_GPIOPWM_T19 19
65#define MXT_SPT_SELFTEST_T25 25
66#define MXT_SPT_CTECONFIG_T28 28
67#define MXT_SPT_USERDATA_T38 38
68#define MXT_SPT_DIGITIZER_T43 43
69#define MXT_SPT_MESSAGECOUNT_T44 44
70#define MXT_SPT_CTECONFIG_T46 46
b23157dc 71#define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
81c88a71 72
5f3f9bc2
ND		 73/* MXT_GEN_MESSAGE_T5 object */
74#define MXT_RPTID_NOMSG 0xff
75
81c88a71 76/* MXT_GEN_COMMAND_T6 field */
7686b108
IV		 77#define MXT_COMMAND_RESET 0
78#define MXT_COMMAND_BACKUPNV 1
79#define MXT_COMMAND_CALIBRATE 2
80#define MXT_COMMAND_REPORTALL 3
81#define MXT_COMMAND_DIAGNOSTIC 5
82
a4a2ef46
IV		 83/* Define for T6 status byte */
84#define MXT_T6_STATUS_RESET (1 << 7)
497767d1
ND		 85#define MXT_T6_STATUS_OFL (1 << 6)
86#define MXT_T6_STATUS_SIGERR (1 << 5)
87#define MXT_T6_STATUS_CAL (1 << 4)
88#define MXT_T6_STATUS_CFGERR (1 << 3)
89#define MXT_T6_STATUS_COMSERR (1 << 2)
a4a2ef46 90
81c88a71 91/* MXT_GEN_POWER_T7 field */
7f3884f7
ND		 92struct t7_config {
93 u8 idle;
94 u8 active;
95} __packed;
96
97#define MXT_POWER_CFG_RUN 0
98#define MXT_POWER_CFG_DEEPSLEEP 1
7686b108 99
81c88a71 100/* MXT_TOUCH_MULTI_T9 field */
7f3884f7 101#define MXT_T9_CTRL 0
61dc1aba
ND		 102#define MXT_T9_ORIENT 9
103#define MXT_T9_RANGE 18
104
f3889ed1
ND		 105/* MXT_TOUCH_MULTI_T9 status */
106#define MXT_T9_UNGRIP (1 << 0)
107#define MXT_T9_SUPPRESS (1 << 1)
108#define MXT_T9_AMP (1 << 2)
109#define MXT_T9_VECTOR (1 << 3)
110#define MXT_T9_MOVE (1 << 4)
111#define MXT_T9_RELEASE (1 << 5)
112#define MXT_T9_PRESS (1 << 6)
113#define MXT_T9_DETECT (1 << 7)
114
61dc1aba
ND		 115struct t9_range {
116 u16 x;
117 u16 y;
118} __packed;
119
f3889ed1
ND		 120/* MXT_TOUCH_MULTI_T9 orient */
121#define MXT_T9_ORIENT_SWITCH (1 << 0)
7686b108 122
81c88a71 123/* MXT_SPT_COMMSCONFIG_T18 */
7686b108
IV		 124#define MXT_COMMS_CTRL 0
125#define MXT_COMMS_CMD 1
126
81c88a71 127/* Define for MXT_GEN_COMMAND_T6 */
7686b108 128#define MXT_BOOT_VALUE 0xa5
a4a2ef46 129#define MXT_RESET_VALUE 0x01
7686b108 130#define MXT_BACKUP_VALUE 0x55
a4a2ef46 131
b23157dc
ND		 132/* T100 Multiple Touch Touchscreen */
133#define MXT_T100_CTRL 0
134#define MXT_T100_CFG1 1
135#define MXT_T100_TCHAUX 3
136#define MXT_T100_XRANGE 13
137#define MXT_T100_YRANGE 24
138
139#define MXT_T100_CFG_SWITCHXY BIT(5)
140
141#define MXT_T100_TCHAUX_VECT BIT(0)
142#define MXT_T100_TCHAUX_AMPL BIT(1)
143#define MXT_T100_TCHAUX_AREA BIT(2)
144
145#define MXT_T100_DETECT BIT(7)
146#define MXT_T100_TYPE_MASK 0x70
147
148enum t100_type {
149 MXT_T100_TYPE_FINGER = 1,
150 MXT_T100_TYPE_PASSIVE_STYLUS = 2,
151 MXT_T100_TYPE_HOVERING_FINGER = 4,
152 MXT_T100_TYPE_GLOVE = 5,
153 MXT_T100_TYPE_LARGE_TOUCH = 6,
154};
155
156#define MXT_DISTANCE_ACTIVE_TOUCH 0
157#define MXT_DISTANCE_HOVERING 1
158
159#define MXT_TOUCH_MAJOR_DEFAULT 1
160#define MXT_PRESSURE_DEFAULT 1
161
a4a2ef46 162/* Delay times */
8343bce1
LT		 163#define MXT_BACKUP_TIME 50 /* msec */
164#define MXT_RESET_TIME 200 /* msec */
a4a2ef46 165#define MXT_RESET_TIMEOUT 3000 /* msec */
c3f78043 166#define MXT_CRC_TIMEOUT 1000 /* msec */
a0434b75
BL		 167#define MXT_FW_RESET_TIME 3000 /* msec */
168#define MXT_FW_CHG_TIMEOUT 300 /* msec */
4cf51c38
JS		 169
170/* Command to unlock bootloader */
7686b108
IV		 171#define MXT_UNLOCK_CMD_MSB 0xaa
172#define MXT_UNLOCK_CMD_LSB 0xdc
4cf51c38
JS		 173
174/* Bootloader mode status */
7686b108
IV		 175#define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
176#define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
177#define MXT_FRAME_CRC_CHECK 0x02
178#define MXT_FRAME_CRC_FAIL 0x03
179#define MXT_FRAME_CRC_PASS 0x04
180#define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
181#define MXT_BOOT_STATUS_MASK 0x3f
e57a66aa
ND		 182#define MXT_BOOT_EXTENDED_ID (1 << 5)
183#define MXT_BOOT_ID_MASK 0x1f
4cf51c38 184
4cf51c38 185/* Touchscreen absolute values */
7686b108 186#define MXT_MAX_AREA 0xff
4cf51c38 187
22dfab7f
DK		 188#define MXT_PIXELS_PER_MM 20
189
7686b108 190struct mxt_info {
4cf51c38
JS		 191 u8 family_id;
192 u8 variant_id;
193 u8 version;
194 u8 build;
195 u8 matrix_xsize;
196 u8 matrix_ysize;
197 u8 object_num;
198};
199
7686b108 200struct mxt_object {
4cf51c38
JS		 201 u8 type;
202 u16 start_address;
1e0c0c5b
DK		 203 u8 size_minus_one;
204 u8 instances_minus_one;
4cf51c38 205 u8 num_report_ids;
333e5a9a 206} __packed;
4cf51c38 207
4cf51c38 208/* Each client has this additional data */
7686b108 209struct mxt_data {
4cf51c38
JS		 210 struct i2c_client *client;
211 struct input_dev *input_dev;
ec02ac2b 212 char phys[64]; /* device physical location */
7686b108
IV		 213 const struct mxt_platform_data *pdata;
214 struct mxt_object *object_table;
215 struct mxt_info info;
4cf51c38 216 unsigned int irq;
910d8051
JS		 217 unsigned int max_x;
218 unsigned int max_y;
d79e7e47 219 bool in_bootloader;
4ce6fa01 220 u16 mem_size;
b23157dc
ND		 221 u8 t100_aux_ampl;
222 u8 t100_aux_area;
223 u8 t100_aux_vect;
9d8dc3e5 224 u8 max_reportid;
c3f78043 225 u32 config_crc;
4ce6fa01 226 u32 info_crc;
f28a842d 227 u8 bootloader_addr;
5f3f9bc2 228 u8 *msg_buf;
497767d1 229 u8 t6_status;
b9b05a89 230 bool update_input;
9d8dc3e5
ND		 231 u8 last_message_count;
232 u8 num_touchids;
b23157dc 233 u8 multitouch;
7f3884f7 234 struct t7_config t7_cfg;
333e5a9a
DK		 235
236 /* Cached parameters from object table */
b9b05a89 237 u16 T5_address;
5f3f9bc2 238 u8 T5_msg_size;
fdf80421 239 u8 T6_reportid;
a4a2ef46 240 u16 T6_address;
4ce6fa01 241 u16 T7_address;
333e5a9a
DK		 242 u8 T9_reportid_min;
243 u8 T9_reportid_max;
22dfab7f 244 u8 T19_reportid;
9d8dc3e5 245 u16 T44_address;
b23157dc
ND		 246 u8 T100_reportid_min;
247 u8 T100_reportid_max;
d79e7e47
BL		 248
249 /* for fw update in bootloader */
250 struct completion bl_completion;
a4a2ef46
IV		 251
252 /* for reset handling */
253 struct completion reset_completion;
c3f78043
ND		 254
255 /* for config update handling */
256 struct completion crc_completion;
4cf51c38
JS		 257};
258
1e0c0c5b
DK		 259static size_t mxt_obj_size(const struct mxt_object *obj)
260{
261 return obj->size_minus_one + 1;
262}
263
264static size_t mxt_obj_instances(const struct mxt_object *obj)
265{
266 return obj->instances_minus_one + 1;
267}
268
7686b108 269static bool mxt_object_readable(unsigned int type)
4cf51c38
JS		 270{
271 switch (type) {
81c88a71
IV		 272 case MXT_GEN_COMMAND_T6:
273 case MXT_GEN_POWER_T7:
274 case MXT_GEN_ACQUIRE_T8:
275 case MXT_GEN_DATASOURCE_T53:
276 case MXT_TOUCH_MULTI_T9:
277 case MXT_TOUCH_KEYARRAY_T15:
278 case MXT_TOUCH_PROXIMITY_T23:
279 case MXT_TOUCH_PROXKEY_T52:
280 case MXT_PROCI_GRIPFACE_T20:
281 case MXT_PROCG_NOISE_T22:
282 case MXT_PROCI_ONETOUCH_T24:
283 case MXT_PROCI_TWOTOUCH_T27:
284 case MXT_PROCI_GRIP_T40:
285 case MXT_PROCI_PALM_T41:
286 case MXT_PROCI_TOUCHSUPPRESSION_T42:
287 case MXT_PROCI_STYLUS_T47:
288 case MXT_PROCG_NOISESUPPRESSION_T48:
289 case MXT_SPT_COMMSCONFIG_T18:
290 case MXT_SPT_GPIOPWM_T19:
291 case MXT_SPT_SELFTEST_T25:
292 case MXT_SPT_CTECONFIG_T28:
293 case MXT_SPT_USERDATA_T38:
294 case MXT_SPT_DIGITIZER_T43:
295 case MXT_SPT_CTECONFIG_T46:
4cf51c38
JS		 296 return true;
297 default:
298 return false;
299 }
300}
301
5f3f9bc2 302static void mxt_dump_message(struct mxt_data *data, u8 *message)
4cf51c38 303{
5f3f9bc2
ND		 304 dev_dbg(&data->client->dev, "message: %*ph\n",
305 data->T5_msg_size, message);
4cf51c38
JS		 306}
307
a4a2ef46
IV		 308static int mxt_wait_for_completion(struct mxt_data *data,
309 struct completion *comp,
310 unsigned int timeout_ms)
d79e7e47
BL		 311{
312 struct device *dev = &data->client->dev;
d79e7e47
BL		 313 unsigned long timeout = msecs_to_jiffies(timeout_ms);
314 long ret;
315
316 ret = wait_for_completion_interruptible_timeout(comp, timeout);
317 if (ret < 0) {
318 return ret;
319 } else if (ret == 0) {
320 dev_err(dev, "Wait for completion timed out.\n");
321 return -ETIMEDOUT;
322 }
323 return 0;
324}
325
f28a842d
ND		 326static int mxt_bootloader_read(struct mxt_data *data,
327 u8 *val, unsigned int count)
328{
329 int ret;
330 struct i2c_msg msg;
331
332 msg.addr = data->bootloader_addr;
333 msg.flags = data->client->flags & I2C_M_TEN;
334 msg.flags |= I2C_M_RD;
335 msg.len = count;
336 msg.buf = val;
337
338 ret = i2c_transfer(data->client->adapter, &msg, 1);
f28a842d
ND		 339 if (ret == 1) {
340 ret = 0;
341 } else {
342 ret = ret < 0 ? ret : -EIO;
343 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
344 __func__, ret);
345 }
346
347 return ret;
348}
349
350static int mxt_bootloader_write(struct mxt_data *data,
351 const u8 * const val, unsigned int count)
352{
353 int ret;
354 struct i2c_msg msg;
355
356 msg.addr = data->bootloader_addr;
357 msg.flags = data->client->flags & I2C_M_TEN;
358 msg.len = count;
359 msg.buf = (u8 *)val;
360
361 ret = i2c_transfer(data->client->adapter, &msg, 1);
362 if (ret == 1) {
363 ret = 0;
364 } else {
365 ret = ret < 0 ? ret : -EIO;
366 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
367 __func__, ret);
368 }
369
370 return ret;
371}
372
8efaa5e5 373static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
f28a842d
ND		 374{
375 u8 appmode = data->client->addr;
376 u8 bootloader;
377
378 switch (appmode) {
379 case 0x4a:
380 case 0x4b:
44a0bab2 381 /* Chips after 1664S use different scheme */
8efaa5e5 382 if (retry || data->info.family_id >= 0xa2) {
44a0bab2
ND		 383 bootloader = appmode - 0x24;
384 break;
385 }
386 /* Fall through for normal case */
f28a842d
ND		 387 case 0x4c:
388 case 0x4d:
389 case 0x5a:
390 case 0x5b:
391 bootloader = appmode - 0x26;
392 break;
6cd1ab0f 393
f28a842d
ND		 394 default:
395 dev_err(&data->client->dev,
396 "Appmode i2c address 0x%02x not found\n",
397 appmode);
398 return -EINVAL;
399 }
400
401 data->bootloader_addr = bootloader;
402 return 0;
403}
404
6cd1ab0f 405static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
a9fdd1e6
ND		 406{
407 struct device *dev = &data->client->dev;
6cd1ab0f 408 int error;
a9fdd1e6
ND		 409 u8 val;
410 bool crc_failure;
411
6cd1ab0f
DT		 412 error = mxt_lookup_bootloader_address(data, alt_address);
413 if (error)
414 return error;
a9fdd1e6 415
6cd1ab0f
DT		 416 error = mxt_bootloader_read(data, &val, 1);
417 if (error)
418 return error;
a9fdd1e6
ND		 419
420 /* Check app crc fail mode */
421 crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
422
423 dev_err(dev, "Detected bootloader, status:%02X%s\n",
424 val, crc_failure ? ", APP_CRC_FAIL" : "");
425
426 return 0;
427}
428
e57a66aa
ND		 429static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
430{
431 struct device *dev = &data->client->dev;
432 u8 buf[3];
433
434 if (val & MXT_BOOT_EXTENDED_ID) {
435 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
436 dev_err(dev, "%s: i2c failure\n", __func__);
68807a0c 437 return val;
e57a66aa
ND		 438 }
439
440 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
441
442 return buf[0];
443 } else {
444 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
445
446 return val;
447 }
448}
449
385deb96
ND		 450static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
451 bool wait)
4cf51c38 452{
f28a842d 453 struct device *dev = &data->client->dev;
4cf51c38 454 u8 val;
d79e7e47 455 int ret;
4cf51c38
JS		 456
457recheck:
385deb96 458 if (wait) {
d79e7e47
BL		 459 /*
460 * In application update mode, the interrupt
461 * line signals state transitions. We must wait for the
462 * CHG assertion before reading the status byte.
463 * Once the status byte has been read, the line is deasserted.
464 */
a4a2ef46
IV		 465 ret = mxt_wait_for_completion(data, &data->bl_completion,
466 MXT_FW_CHG_TIMEOUT);
d79e7e47
BL		 467 if (ret) {
468 /*
469 * TODO: handle -ERESTARTSYS better by terminating
470 * fw update process before returning to userspace
471 * by writing length 0x000 to device (iff we are in
472 * WAITING_FRAME_DATA state).
473 */
f28a842d 474 dev_err(dev, "Update wait error %d\n", ret);
d79e7e47
BL		 475 return ret;
476 }
477 }
478
f28a842d
ND		 479 ret = mxt_bootloader_read(data, &val, 1);
480 if (ret)
481 return ret;
4cf51c38 482
e57a66aa
ND		 483 if (state == MXT_WAITING_BOOTLOAD_CMD)
484 val = mxt_get_bootloader_version(data, val);
485
4cf51c38 486 switch (state) {
7686b108
IV		 487 case MXT_WAITING_BOOTLOAD_CMD:
488 case MXT_WAITING_FRAME_DATA:
a9fdd1e6 489 case MXT_APP_CRC_FAIL:
7686b108 490 val &= ~MXT_BOOT_STATUS_MASK;
4cf51c38 491 break;
7686b108 492 case MXT_FRAME_CRC_PASS:
f943c74a 493 if (val == MXT_FRAME_CRC_CHECK) {
4cf51c38 494 goto recheck;
f943c74a
ND		 495 } else if (val == MXT_FRAME_CRC_FAIL) {
496 dev_err(dev, "Bootloader CRC fail\n");
497 return -EINVAL;
498 }
4cf51c38
JS		 499 break;
500 default:
501 return -EINVAL;
502 }
503
504 if (val != state) {
f28a842d 505 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
7bed6805 506 val, state);
4cf51c38
JS		 507 return -EINVAL;
508 }
509
510 return 0;
511}
512
8efaa5e5 513static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
4cf51c38 514{
f28a842d 515 int ret;
4cf51c38
JS		 516 u8 buf[2];
517
8efaa5e5
ND		 518 if (unlock) {
519 buf[0] = MXT_UNLOCK_CMD_LSB;
520 buf[1] = MXT_UNLOCK_CMD_MSB;
521 } else {
522 buf[0] = 0x01;
523 buf[1] = 0x01;
524 }
4cf51c38 525
f28a842d
ND		 526 ret = mxt_bootloader_write(data, buf, 2);
527 if (ret)
528 return ret;
4cf51c38
JS		 529
530 return 0;
531}
532
7686b108 533static int __mxt_read_reg(struct i2c_client *client,
4cf51c38
JS		 534 u16 reg, u16 len, void *val)
535{
536 struct i2c_msg xfer[2];
537 u8 buf[2];
771733e3 538 int ret;
4cf51c38
JS		 539
540 buf[0] = reg & 0xff;
541 buf[1] = (reg >> 8) & 0xff;
542
543 /* Write register */
544 xfer[0].addr = client->addr;
545 xfer[0].flags = 0;
546 xfer[0].len = 2;
547 xfer[0].buf = buf;
548
549 /* Read data */
550 xfer[1].addr = client->addr;
551 xfer[1].flags = I2C_M_RD;
552 xfer[1].len = len;
553 xfer[1].buf = val;
554
771733e3
DK		 555 ret = i2c_transfer(client->adapter, xfer, 2);
556 if (ret == 2) {
557 ret = 0;
558 } else {
559 if (ret >= 0)
560 ret = -EIO;
561 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
562 __func__, ret);
4cf51c38
JS		 563 }
564
771733e3 565 return ret;
4cf51c38
JS		 566}
567
9638ab7c
DK		 568static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
569 const void *val)
4cf51c38 570{
9638ab7c
DK		 571 u8 *buf;
572 size_t count;
771733e3 573 int ret;
4cf51c38 574
9638ab7c
DK		 575 count = len + 2;
576 buf = kmalloc(count, GFP_KERNEL);
577 if (!buf)
578 return -ENOMEM;
4cf51c38
JS		 579
580 buf[0] = reg & 0xff;
581 buf[1] = (reg >> 8) & 0xff;
9638ab7c 582 memcpy(&buf[2], val, len);
4cf51c38 583
9638ab7c
DK		 584 ret = i2c_master_send(client, buf, count);
585 if (ret == count) {
771733e3
DK		 586 ret = 0;
587 } else {
588 if (ret >= 0)
589 ret = -EIO;
590 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
591 __func__, ret);
4cf51c38
JS		 592 }
593
9638ab7c 594 kfree(buf);
771733e3 595 return ret;
4cf51c38
JS		 596}
597
9638ab7c 598static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
4cf51c38 599{
9638ab7c 600 return __mxt_write_reg(client, reg, 1, &val);
4cf51c38
JS		 601}
602
7686b108
IV		 603static struct mxt_object *
604mxt_get_object(struct mxt_data *data, u8 type)
4cf51c38 605{
7686b108 606 struct mxt_object *object;
4cf51c38
JS		 607 int i;
608
609 for (i = 0; i < data->info.object_num; i++) {
610 object = data->object_table + i;
611 if (object->type == type)
612 return object;
613 }
614
50a77c65 615 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
4cf51c38
JS		 616 return NULL;
617}
618
497767d1
ND		 619static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
620{
621 struct device *dev = &data->client->dev;
622 u8 status = msg[1];
623 u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
624
625 complete(&data->crc_completion);
626
627 if (crc != data->config_crc) {
628 data->config_crc = crc;
629 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
630 }
631
632 /* Detect reset */
633 if (status & MXT_T6_STATUS_RESET)
634 complete(&data->reset_completion);
635
636 /* Output debug if status has changed */
637 if (status != data->t6_status)
638 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
639 status,
640 status == 0 ? " OK" : "",
641 status & MXT_T6_STATUS_RESET ? " RESET" : "",
642 status & MXT_T6_STATUS_OFL ? " OFL" : "",
643 status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
644 status & MXT_T6_STATUS_CAL ? " CAL" : "",
645 status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
646 status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
647
648 /* Save current status */
649 data->t6_status = status;
650}
651
7f405483
LT		 652static int mxt_write_object(struct mxt_data *data,
653 u8 type, u8 offset, u8 val)
654{
655 struct mxt_object *object;
656 u16 reg;
657
658 object = mxt_get_object(data, type);
659 if (!object || offset >= mxt_obj_size(object))
660 return -EINVAL;
661
662 reg = object->start_address;
663 return mxt_write_reg(data->client, reg + offset, val);
664}
665
5f3f9bc2 666static void mxt_input_button(struct mxt_data *data, u8 *message)
22dfab7f
DK		 667{
668 struct input_dev *input = data->input_dev;
fb5e4c3e 669 const struct mxt_platform_data *pdata = data->pdata;
22dfab7f
DK		 670 int i;
671
fb5e4c3e
ND		 672 for (i = 0; i < pdata->t19_num_keys; i++) {
673 if (pdata->t19_keymap[i] == KEY_RESERVED)
22dfab7f 674 continue;
c37f6d38
DT		 675
676 /* Active-low switch */
677 input_report_key(input, pdata->t19_keymap[i],
678 !(message[1] & BIT(i)));
22dfab7f
DK		 679 }
680}
681
b735fbe0 682static void mxt_input_sync(struct mxt_data *data)
eef820dc 683{
b735fbe0
BL		 684 input_mt_report_pointer_emulation(data->input_dev,
685 data->pdata->t19_num_keys);
686 input_sync(data->input_dev);
eef820dc
ND		 687}
688
b9b05a89 689static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
4cf51c38 690{
4cf51c38 691 struct device *dev = &data->client->dev;
fba5bc31 692 struct input_dev *input_dev = data->input_dev;
5f3f9bc2
ND		 693 int id;
694 u8 status;
4cf51c38
JS		 695 int x;
696 int y;
697 int area;
fea9e467 698 int amplitude;
4cf51c38 699
5f3f9bc2
ND		 700 id = message[0] - data->T9_reportid_min;
701 status = message[1];
702 x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
703 y = (message[3] << 4) | ((message[4] & 0xf));
eef820dc
ND		 704
705 /* Handle 10/12 bit switching */
910d8051 706 if (data->max_x < 1024)
eef820dc 707 x >>= 2;
910d8051 708 if (data->max_y < 1024)
eef820dc 709 y >>= 2;
910d8051 710
5f3f9bc2
ND		 711 area = message[5];
712 amplitude = message[6];
4cf51c38 713
b2e459b8
DK		 714 dev_dbg(dev,
715 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
716 id,
f3889ed1
ND		 717 (status & MXT_T9_DETECT) ? 'D' : '.',
718 (status & MXT_T9_PRESS) ? 'P' : '.',
719 (status & MXT_T9_RELEASE) ? 'R' : '.',
720 (status & MXT_T9_MOVE) ? 'M' : '.',
721 (status & MXT_T9_VECTOR) ? 'V' : '.',
722 (status & MXT_T9_AMP) ? 'A' : '.',
723 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
724 (status & MXT_T9_UNGRIP) ? 'U' : '.',
fea9e467 725 x, y, area, amplitude);
b2e459b8 726
fba5bc31 727 input_mt_slot(input_dev, id);
fba5bc31 728
f3889ed1 729 if (status & MXT_T9_DETECT) {
eef820dc
ND		 730 /*
731 * Multiple bits may be set if the host is slow to read
732 * the status messages, indicating all the events that
733 * have happened.
734 */
735 if (status & MXT_T9_RELEASE) {
736 input_mt_report_slot_state(input_dev,
737 MT_TOOL_FINGER, 0);
b735fbe0 738 mxt_input_sync(data);
eef820dc
ND		 739 }
740
741 /* Touch active */
742 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
fba5bc31
DK		 743 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
744 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
fea9e467 745 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
fba5bc31 746 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
eef820dc
ND		 747 } else {
748 /* Touch no longer active, close out slot */
749 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
fba5bc31 750 }
b9b05a89
ND		 751
752 data->update_input = true;
4cf51c38 753}
4cf51c38 754
b23157dc
ND		 755static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
756{
757 struct device *dev = &data->client->dev;
758 struct input_dev *input_dev = data->input_dev;
759 int id;
760 u8 status;
761 u8 type = 0;
762 u16 x;
763 u16 y;
764 int distance = 0;
765 int tool = 0;
766 u8 major = 0;
767 u8 pressure = 0;
768 u8 orientation = 0;
769
770 id = message[0] - data->T100_reportid_min - 2;
771
772 /* ignore SCRSTATUS events */
773 if (id < 0)
774 return;
775
776 status = message[1];
777 x = get_unaligned_le16(&message[2]);
778 y = get_unaligned_le16(&message[4]);
779
780 if (status & MXT_T100_DETECT) {
781 type = (status & MXT_T100_TYPE_MASK) >> 4;
782
783 switch (type) {
784 case MXT_T100_TYPE_HOVERING_FINGER:
785 tool = MT_TOOL_FINGER;
786 distance = MXT_DISTANCE_HOVERING;
787
788 if (data->t100_aux_vect)
789 orientation = message[data->t100_aux_vect];
790
791 break;
792
793 case MXT_T100_TYPE_FINGER:
794 case MXT_T100_TYPE_GLOVE:
795 tool = MT_TOOL_FINGER;
796 distance = MXT_DISTANCE_ACTIVE_TOUCH;
797
798 if (data->t100_aux_area)
799 major = message[data->t100_aux_area];
800
801 if (data->t100_aux_ampl)
802 pressure = message[data->t100_aux_ampl];
803
804 if (data->t100_aux_vect)
805 orientation = message[data->t100_aux_vect];
806
807 break;
808
809 case MXT_T100_TYPE_PASSIVE_STYLUS:
810 tool = MT_TOOL_PEN;
811
812 /*
813 * Passive stylus is reported with size zero so
814 * hardcode.
815 */
816 major = MXT_TOUCH_MAJOR_DEFAULT;
817
818 if (data->t100_aux_ampl)
819 pressure = message[data->t100_aux_ampl];
820
821 break;
822
823 case MXT_T100_TYPE_LARGE_TOUCH:
824 /* Ignore suppressed touch */
825 break;
826
827 default:
828 dev_dbg(dev, "Unexpected T100 type\n");
829 return;
830 }
831 }
832
833 /*
834 * Values reported should be non-zero if tool is touching the
835 * device
836 */
837 if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
838 pressure = MXT_PRESSURE_DEFAULT;
839
840 input_mt_slot(input_dev, id);
841
842 if (status & MXT_T100_DETECT) {
843 dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
844 id, type, x, y, major, pressure, orientation);
845
846 input_mt_report_slot_state(input_dev, tool, 1);
847 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
848 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
849 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
850 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
851 input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
852 input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
853 } else {
854 dev_dbg(dev, "[%u] release\n", id);
855
856 /* close out slot */
857 input_mt_report_slot_state(input_dev, 0, 0);
858 }
859
860 data->update_input = true;
861}
862
b9b05a89 863static int mxt_proc_message(struct mxt_data *data, u8 *message)
04a79181 864{
b9b05a89
ND		 865 u8 report_id = message[0];
866
867 if (report_id == MXT_RPTID_NOMSG)
868 return 0;
869
870 if (report_id == data->T6_reportid) {
871 mxt_proc_t6_messages(data, message);
872 } else if (!data->input_dev) {
873 /*
874 * Do not report events if input device
875 * is not yet registered.
876 */
877 mxt_dump_message(data, message);
b23157dc
ND		 878 } else if (report_id >= data->T9_reportid_min &&
879 report_id <= data->T9_reportid_max) {
b9b05a89 880 mxt_proc_t9_message(data, message);
b23157dc
ND		 881 } else if (report_id >= data->T100_reportid_min &&
882 report_id <= data->T100_reportid_max) {
883 mxt_proc_t100_message(data, message);
b9b05a89
ND		 884 } else if (report_id == data->T19_reportid) {
885 mxt_input_button(data, message);
886 data->update_input = true;
887 } else {
888 mxt_dump_message(data, message);
889 }
890
891 return 1;
4cf51c38
JS		 892}
893
9d8dc3e5 894static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
4cf51c38 895{
4cf51c38 896 struct device *dev = &data->client->dev;
b9b05a89 897 int ret;
9d8dc3e5
ND		 898 int i;
899 u8 num_valid = 0;
900
901 /* Safety check for msg_buf */
902 if (count > data->max_reportid)
903 return -EINVAL;
4cf51c38 904
9d8dc3e5 905 /* Process remaining messages if necessary */
b9b05a89 906 ret = __mxt_read_reg(data->client, data->T5_address,
9d8dc3e5 907 data->T5_msg_size * count, data->msg_buf);
b9b05a89 908 if (ret) {
9d8dc3e5 909 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
b9b05a89
ND		 910 return ret;
911 }
4cf51c38 912
9d8dc3e5
ND		 913 for (i = 0; i < count; i++) {
914 ret = mxt_proc_message(data,
915 data->msg_buf + data->T5_msg_size * i);
916
917 if (ret == 1)
918 num_valid++;
919 }
920
921 /* return number of messages read */
922 return num_valid;
b9b05a89 923}
4cf51c38 924
9d8dc3e5 925static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
b9b05a89 926{
9d8dc3e5 927 struct device *dev = &data->client->dev;
b9b05a89 928 int ret;
9d8dc3e5 929 u8 count, num_left;
4cf51c38 930
9d8dc3e5
ND		 931 /* Read T44 and T5 together */
932 ret = __mxt_read_reg(data->client, data->T44_address,
933 data->T5_msg_size + 1, data->msg_buf);
934 if (ret) {
935 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
936 return IRQ_NONE;
937 }
938
939 count = data->msg_buf[0];
940
941 if (count == 0) {
651b4608
ND		 942 /*
943 * This condition is caused by the CHG line being configured
944 * in Mode 0. It results in unnecessary I2C operations but it
945 * is benign.
946 */
947 dev_dbg(dev, "Interrupt triggered but zero messages\n");
9d8dc3e5
ND		 948 return IRQ_NONE;
949 } else if (count > data->max_reportid) {
950 dev_err(dev, "T44 count %d exceeded max report id\n", count);
951 count = data->max_reportid;
952 }
953
954 /* Process first message */
955 ret = mxt_proc_message(data, data->msg_buf + 1);
956 if (ret < 0) {
957 dev_warn(dev, "Unexpected invalid message\n");
958 return IRQ_NONE;
959 }
960
961 num_left = count - 1;
962
963 /* Process remaining messages if necessary */
964 if (num_left) {
965 ret = mxt_read_and_process_messages(data, num_left);
b9b05a89 966 if (ret < 0)
9d8dc3e5
ND		 967 goto end;
968 else if (ret != num_left)
969 dev_warn(dev, "Unexpected invalid message\n");
970 }
971
972end:
973 if (data->update_input) {
974 mxt_input_sync(data);
975 data->update_input = false;
976 }
977
978 return IRQ_HANDLED;
979}
980
981static int mxt_process_messages_until_invalid(struct mxt_data *data)
982{
983 struct device *dev = &data->client->dev;
984 int count, read;
985 u8 tries = 2;
986
987 count = data->max_reportid;
988
989 /* Read messages until we force an invalid */
990 do {
991 read = mxt_read_and_process_messages(data, count);
992 if (read < count)
993 return 0;
994 } while (--tries);
995
996 if (data->update_input) {
997 mxt_input_sync(data);
998 data->update_input = false;
999 }
1000
1001 dev_err(dev, "CHG pin isn't cleared\n");
1002 return -EBUSY;
1003}
1004
1005static irqreturn_t mxt_process_messages(struct mxt_data *data)
1006{
1007 int total_handled, num_handled;
1008 u8 count = data->last_message_count;
1009
1010 if (count < 1 || count > data->max_reportid)
1011 count = 1;
1012
1013 /* include final invalid message */
1014 total_handled = mxt_read_and_process_messages(data, count + 1);
1015 if (total_handled < 0)
1016 return IRQ_NONE;
1017 /* if there were invalid messages, then we are done */
1018 else if (total_handled <= count)
1019 goto update_count;
1020
1021 /* keep reading two msgs until one is invalid or reportid limit */
1022 do {
1023 num_handled = mxt_read_and_process_messages(data, 2);
1024 if (num_handled < 0)
b9b05a89 1025 return IRQ_NONE;
9d8dc3e5
ND		 1026
1027 total_handled += num_handled;
1028
1029 if (num_handled < 2)
1030 break;
1031 } while (total_handled < data->num_touchids);
1032
1033update_count:
1034 data->last_message_count = total_handled;
b9b05a89
ND		 1035
1036 if (data->update_input) {
b735fbe0 1037 mxt_input_sync(data);
b9b05a89
ND		 1038 data->update_input = false;
1039 }
64464ae8 1040
4cf51c38
JS		 1041 return IRQ_HANDLED;
1042}
1043
d79e7e47
BL		 1044static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1045{
1046 struct mxt_data *data = dev_id;
1047
1048 if (data->in_bootloader) {
1049 /* bootloader state transition completion */
1050 complete(&data->bl_completion);
1051 return IRQ_HANDLED;
1052 }
1053
dd24dcf5
ND		 1054 if (!data->object_table)
1055 return IRQ_HANDLED;
1056
9d8dc3e5
ND		 1057 if (data->T44_address) {
1058 return mxt_process_messages_t44(data);
1059 } else {
1060 return mxt_process_messages(data);
1061 }
d79e7e47
BL		 1062}
1063
a4a2ef46
IV		 1064static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1065 u8 value, bool wait)
1066{
1067 u16 reg;
1068 u8 command_register;
1069 int timeout_counter = 0;
1070 int ret;
1071
1072 reg = data->T6_address + cmd_offset;
1073
1074 ret = mxt_write_reg(data->client, reg, value);
1075 if (ret)
1076 return ret;
1077
1078 if (!wait)
1079 return 0;
1080
1081 do {
1082 msleep(20);
1083 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1084 if (ret)
1085 return ret;
1086 } while (command_register != 0 && timeout_counter++ <= 100);
1087
1088 if (timeout_counter > 100) {
1089 dev_err(&data->client->dev, "Command failed!\n");
1090 return -EIO;
1091 }
1092
1093 return 0;
1094}
1095
1096static int mxt_soft_reset(struct mxt_data *data)
1097{
1098 struct device *dev = &data->client->dev;
1099 int ret = 0;
1100
885f3fb9
ND		 1101 dev_info(dev, "Resetting device\n");
1102
1103 disable_irq(data->irq);
a4a2ef46
IV		 1104
1105 reinit_completion(&data->reset_completion);
1106
1107 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1108 if (ret)
1109 return ret;
1110
885f3fb9
ND		 1111 /* Ignore CHG line for 100ms after reset */
1112 msleep(100);
1113
1114 enable_irq(data->irq);
1115
a4a2ef46
IV		 1116 ret = mxt_wait_for_completion(data, &data->reset_completion,
1117 MXT_RESET_TIMEOUT);
1118 if (ret)
1119 return ret;
1120
1121 return 0;
1122}
1123
c3f78043
ND		 1124static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1125{
1126 /*
1127 * On failure, CRC is set to 0 and config will always be
1128 * downloaded.
1129 */
1130 data->config_crc = 0;
1131 reinit_completion(&data->crc_completion);
1132
1133 mxt_t6_command(data, cmd, value, true);
1134
1135 /*
1136 * Wait for crc message. On failure, CRC is set to 0 and config will
1137 * always be downloaded.
1138 */
1139 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1140}
1141
4ce6fa01
ND		 1142static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1143{
1144 static const unsigned int crcpoly = 0x80001B;
1145 u32 result;
1146 u32 data_word;
1147
1148 data_word = (secondbyte << 8) | firstbyte;
1149 result = ((*crc << 1) ^ data_word);
1150
1151 if (result & 0x1000000)
1152 result ^= crcpoly;
1153
1154 *crc = result;
1155}
1156
1157static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1158{
1159 u32 crc = 0;
1160 u8 *ptr = base + start_off;
1161 u8 *last_val = base + end_off - 1;
1162
1163 if (end_off < start_off)
1164 return -EINVAL;
1165
1166 while (ptr < last_val) {
1167 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1168 ptr += 2;
1169 }
1170
1171 /* if len is odd, fill the last byte with 0 */
1172 if (ptr == last_val)
1173 mxt_calc_crc24(&crc, *ptr, 0);
1174
1175 /* Mask to 24-bit */
1176 crc &= 0x00FFFFFF;
1177
1178 return crc;
1179}
1180
efdbd7ae
DT		 1181static int mxt_prepare_cfg_mem(struct mxt_data *data,
1182 const struct firmware *cfg,
1183 unsigned int data_pos,
1184 unsigned int cfg_start_ofs,
1185 u8 *config_mem,
1186 size_t config_mem_size)
1187{
1188 struct device *dev = &data->client->dev;
1189 struct mxt_object *object;
1190 unsigned int type, instance, size, byte_offset;
1191 int offset;
1192 int ret;
1193 int i;
1194 u16 reg;
1195 u8 val;
1196
1197 while (data_pos < cfg->size) {
1198 /* Read type, instance, length */
1199 ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
1200 &type, &instance, &size, &offset);
1201 if (ret == 0) {
1202 /* EOF */
1203 break;
1204 } else if (ret != 3) {
1205 dev_err(dev, "Bad format: failed to parse object\n");
1206 return -EINVAL;
1207 }
1208 data_pos += offset;
1209
1210 object = mxt_get_object(data, type);
1211 if (!object) {
1212 /* Skip object */
1213 for (i = 0; i < size; i++) {
1214 ret = sscanf(cfg->data + data_pos, "%hhx%n",
041fa159
DT		 1215 &val, &offset);
1216 if (ret != 1) {
1217 dev_err(dev, "Bad format in T%d at %d\n",
1218 type, i);
1219 return -EINVAL;
1220 }
efdbd7ae
DT		 1221 data_pos += offset;
1222 }
1223 continue;
1224 }
1225
1226 if (size > mxt_obj_size(object)) {
1227 /*
1228 * Either we are in fallback mode due to wrong
1229 * config or config from a later fw version,
1230 * or the file is corrupt or hand-edited.
1231 */
1232 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1233 size - mxt_obj_size(object), type);
1234 } else if (mxt_obj_size(object) > size) {
1235 /*
1236 * If firmware is upgraded, new bytes may be added to
1237 * end of objects. It is generally forward compatible
1238 * to zero these bytes - previous behaviour will be
1239 * retained. However this does invalidate the CRC and
1240 * will force fallback mode until the configuration is
1241 * updated. We warn here but do nothing else - the
1242 * malloc has zeroed the entire configuration.
1243 */
1244 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1245 mxt_obj_size(object) - size, type);
1246 }
1247
1248 if (instance >= mxt_obj_instances(object)) {
1249 dev_err(dev, "Object instances exceeded!\n");
1250 return -EINVAL;
1251 }
1252
1253 reg = object->start_address + mxt_obj_size(object) * instance;
1254
1255 for (i = 0; i < size; i++) {
1256 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1257 &val,
1258 &offset);
1259 if (ret != 1) {
041fa159
DT		 1260 dev_err(dev, "Bad format in T%d at %d\n",
1261 type, i);
efdbd7ae
DT		 1262 return -EINVAL;
1263 }
1264 data_pos += offset;
1265
1266 if (i > mxt_obj_size(object))
1267 continue;
1268
1269 byte_offset = reg + i - cfg_start_ofs;
1270
041fa159 1271 if (byte_offset >= 0 && byte_offset < config_mem_size) {
efdbd7ae
DT		 1272 *(config_mem + byte_offset) = val;
1273 } else {
1274 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1275 reg, object->type, byte_offset);
1276 return -EINVAL;
1277 }
1278 }
1279 }
1280
1281 return 0;
1282}
1283
1284static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
1285 u8 *config_mem, size_t config_mem_size)
1286{
1287 unsigned int byte_offset = 0;
1288 int error;
1289
1290 /* Write configuration as blocks */
1291 while (byte_offset < config_mem_size) {
1292 unsigned int size = config_mem_size - byte_offset;
1293
1294 if (size > MXT_MAX_BLOCK_WRITE)
1295 size = MXT_MAX_BLOCK_WRITE;
1296
1297 error = __mxt_write_reg(data->client,
1298 cfg_start + byte_offset,
1299 size, config_mem + byte_offset);
1300 if (error) {
1301 dev_err(&data->client->dev,
1302 "Config write error, ret=%d\n", error);
1303 return error;
1304 }
1305
1306 byte_offset += size;
1307 }
1308
1309 return 0;
1310}
1311
7f3884f7
ND		 1312static int mxt_init_t7_power_cfg(struct mxt_data *data);
1313
50a77c65
ND		 1314/*
1315 * mxt_update_cfg - download configuration to chip
1316 *
1317 * Atmel Raw Config File Format
1318 *
1319 * The first four lines of the raw config file contain:
1320 * 1) Version
1321 * 2) Chip ID Information (first 7 bytes of device memory)
1322 * 3) Chip Information Block 24-bit CRC Checksum
1323 * 4) Chip Configuration 24-bit CRC Checksum
1324 *
1325 * The rest of the file consists of one line per object instance:
1326 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1327 *
1328 * <TYPE> - 2-byte object type as hex
1329 * <INSTANCE> - 2-byte object instance number as hex
1330 * <SIZE> - 2-byte object size as hex
1331 * <CONTENTS> - array of <SIZE> 1-byte hex values
1332 */
1333static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
4cf51c38 1334{
4cf51c38 1335 struct device *dev = &data->client->dev;
50a77c65 1336 struct mxt_info cfg_info;
cf94bc09 1337 int ret;
50a77c65 1338 int offset;
4ce6fa01 1339 int data_pos;
50a77c65 1340 int i;
4ce6fa01
ND		 1341 int cfg_start_ofs;
1342 u32 info_crc, config_crc, calculated_crc;
1343 u8 *config_mem;
1344 size_t config_mem_size;
4cf51c38 1345
50a77c65
ND		 1346 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1347
1348 if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1349 dev_err(dev, "Unrecognised config file\n");
efdbd7ae 1350 return -EINVAL;
4cf51c38
JS		 1351 }
1352
4ce6fa01 1353 data_pos = strlen(MXT_CFG_MAGIC);
50a77c65
ND		 1354
1355 /* Load information block and check */
1356 for (i = 0; i < sizeof(struct mxt_info); i++) {
4ce6fa01 1357 ret = sscanf(cfg->data + data_pos, "%hhx%n",
50a77c65
ND		 1358 (unsigned char *)&cfg_info + i,
1359 &offset);
1360 if (ret != 1) {
1361 dev_err(dev, "Bad format\n");
efdbd7ae 1362 return -EINVAL;
50a77c65 1363 }
c3f78043 1364
4ce6fa01 1365 data_pos += offset;
c3f78043
ND		 1366 }
1367
50a77c65
ND		 1368 if (cfg_info.family_id != data->info.family_id) {
1369 dev_err(dev, "Family ID mismatch!\n");
efdbd7ae 1370 return -EINVAL;
50a77c65 1371 }
c3f78043 1372
50a77c65
ND		 1373 if (cfg_info.variant_id != data->info.variant_id) {
1374 dev_err(dev, "Variant ID mismatch!\n");
efdbd7ae 1375 return -EINVAL;
50a77c65 1376 }
4cf51c38 1377
4ce6fa01
ND		 1378 /* Read CRCs */
1379 ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
50a77c65
ND		 1380 if (ret != 1) {
1381 dev_err(dev, "Bad format: failed to parse Info CRC\n");
efdbd7ae 1382 return -EINVAL;
50a77c65 1383 }
4ce6fa01 1384 data_pos += offset;
50a77c65 1385
4ce6fa01 1386 ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
50a77c65
ND		 1387 if (ret != 1) {
1388 dev_err(dev, "Bad format: failed to parse Config CRC\n");
efdbd7ae 1389 return -EINVAL;
50a77c65 1390 }
4ce6fa01 1391 data_pos += offset;
50a77c65 1392
4ce6fa01
ND		 1393 /*
1394 * The Info Block CRC is calculated over mxt_info and the object
1395 * table. If it does not match then we are trying to load the
1396 * configuration from a different chip or firmware version, so
1397 * the configuration CRC is invalid anyway.
1398 */
1399 if (info_crc == data->info_crc) {
1400 if (config_crc == 0 || data->config_crc == 0) {
1401 dev_info(dev, "CRC zero, attempting to apply config\n");
1402 } else if (config_crc == data->config_crc) {
1403 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1404 data->config_crc);
efdbd7ae 1405 return 0;
4ce6fa01
ND		 1406 } else {
1407 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1408 data->config_crc, config_crc);
1409 }
1410 } else {
1411 dev_warn(dev,
1412 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1413 data->info_crc, info_crc);
50a77c65
ND		 1414 }
1415
4ce6fa01
ND		 1416 /* Malloc memory to store configuration */
1417 cfg_start_ofs = MXT_OBJECT_START +
1418 data->info.object_num * sizeof(struct mxt_object) +
1419 MXT_INFO_CHECKSUM_SIZE;
1420 config_mem_size = data->mem_size - cfg_start_ofs;
1421 config_mem = kzalloc(config_mem_size, GFP_KERNEL);
1422 if (!config_mem) {
1423 dev_err(dev, "Failed to allocate memory\n");
efdbd7ae 1424 return -ENOMEM;
4ce6fa01 1425 }
50a77c65 1426
efdbd7ae
DT		 1427 ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
1428 config_mem, config_mem_size);
1429 if (ret)
1430 goto release_mem;
50a77c65 1431
4ce6fa01
ND		 1432 /* Calculate crc of the received configs (not the raw config file) */
1433 if (data->T7_address < cfg_start_ofs) {
1434 dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
1435 data->T7_address, cfg_start_ofs);
1436 ret = 0;
1437 goto release_mem;
1438 }
50a77c65 1439
4ce6fa01
ND		 1440 calculated_crc = mxt_calculate_crc(config_mem,
1441 data->T7_address - cfg_start_ofs,
1442 config_mem_size);
1443
efdbd7ae 1444 if (config_crc > 0 && config_crc != calculated_crc)
4ce6fa01
ND		 1445 dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
1446 calculated_crc, config_crc);
1447
efdbd7ae
DT		 1448 ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
1449 config_mem, config_mem_size);
1450 if (ret)
1451 goto release_mem;
4cf51c38 1452
c3f78043
ND		 1453 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1454
1455 ret = mxt_soft_reset(data);
1456 if (ret)
4ce6fa01 1457 goto release_mem;
c3f78043
ND		 1458
1459 dev_info(dev, "Config successfully updated\n");
1460
7f3884f7
ND		 1461 /* T7 config may have changed */
1462 mxt_init_t7_power_cfg(data);
1463
4ce6fa01
ND		 1464release_mem:
1465 kfree(config_mem);
50a77c65 1466 return ret;
4cf51c38
JS		 1467}
1468
dd24dcf5
ND		 1469static int mxt_acquire_irq(struct mxt_data *data)
1470{
1471 int error;
1472
1473 enable_irq(data->irq);
1474
9d8dc3e5 1475 error = mxt_process_messages_until_invalid(data);
dd24dcf5
ND		 1476 if (error)
1477 return error;
1478
1479 return 0;
1480}
1481
7686b108 1482static int mxt_get_info(struct mxt_data *data)
4cf51c38
JS		 1483{
1484 struct i2c_client *client = data->client;
7686b108 1485 struct mxt_info *info = &data->info;
4cf51c38 1486 int error;
4cf51c38 1487
23003a84 1488 /* Read 7-byte info block starting at address 0 */
146c6a66 1489 error = __mxt_read_reg(client, 0, sizeof(*info), info);
4cf51c38
JS		 1490 if (error)
1491 return error;
4cf51c38
JS		 1492
1493 return 0;
1494}
1495
58e4aeee 1496static void mxt_free_input_device(struct mxt_data *data)
5f3f9bc2 1497{
58e4aeee
SW		 1498 if (data->input_dev) {
1499 input_unregister_device(data->input_dev);
1500 data->input_dev = NULL;
1501 }
1502}
5f3f9bc2 1503
58e4aeee
SW		 1504static void mxt_free_object_table(struct mxt_data *data)
1505{
5f3f9bc2
ND		 1506 kfree(data->object_table);
1507 data->object_table = NULL;
1508 kfree(data->msg_buf);
1509 data->msg_buf = NULL;
b9b05a89 1510 data->T5_address = 0;
5f3f9bc2
ND		 1511 data->T5_msg_size = 0;
1512 data->T6_reportid = 0;
1513 data->T7_address = 0;
1514 data->T9_reportid_min = 0;
1515 data->T9_reportid_max = 0;
1516 data->T19_reportid = 0;
9d8dc3e5 1517 data->T44_address = 0;
b23157dc
ND		 1518 data->T100_reportid_min = 0;
1519 data->T100_reportid_max = 0;
9d8dc3e5 1520 data->max_reportid = 0;
5f3f9bc2
ND		 1521}
1522
7686b108 1523static int mxt_get_object_table(struct mxt_data *data)
4cf51c38 1524{
333e5a9a
DK		 1525 struct i2c_client *client = data->client;
1526 size_t table_size;
dd24dcf5 1527 struct mxt_object *object_table;
4cf51c38
JS		 1528 int error;
1529 int i;
333e5a9a 1530 u8 reportid;
4ce6fa01 1531 u16 end_address;
333e5a9a
DK		 1532
1533 table_size = data->info.object_num * sizeof(struct mxt_object);
dd24dcf5
ND		 1534 object_table = kzalloc(table_size, GFP_KERNEL);
1535 if (!object_table) {
1536 dev_err(&data->client->dev, "Failed to allocate memory\n");
1537 return -ENOMEM;
1538 }
1539
333e5a9a 1540 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
dd24dcf5
ND		 1541 object_table);
1542 if (error) {
1543 kfree(object_table);
333e5a9a 1544 return error;
dd24dcf5 1545 }
4cf51c38 1546
333e5a9a
DK		 1547 /* Valid Report IDs start counting from 1 */
1548 reportid = 1;
4ce6fa01 1549 data->mem_size = 0;
4cf51c38 1550 for (i = 0; i < data->info.object_num; i++) {
dd24dcf5 1551 struct mxt_object *object = object_table + i;
333e5a9a 1552 u8 min_id, max_id;
4cf51c38 1553
333e5a9a 1554 le16_to_cpus(&object->start_address);
4cf51c38
JS		 1555
1556 if (object->num_report_ids) {
333e5a9a 1557 min_id = reportid;
4cf51c38 1558 reportid += object->num_report_ids *
1e0c0c5b 1559 mxt_obj_instances(object);
333e5a9a
DK		 1560 max_id = reportid - 1;
1561 } else {
1562 min_id = 0;
1563 max_id = 0;
1564 }
1565
1566 dev_dbg(&data->client->dev,
7bed6805 1567 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1e0c0c5b
DK		 1568 object->type, object->start_address,
1569 mxt_obj_size(object), mxt_obj_instances(object),
1570 min_id, max_id);
333e5a9a
DK		 1571
1572 switch (object->type) {
5f3f9bc2 1573 case MXT_GEN_MESSAGE_T5:
437d4f37
ND		 1574 if (data->info.family_id == 0x80 &&
1575 data->info.version < 0x20) {
9d8dc3e5 1576 /*
437d4f37
ND		 1577 * On mXT224 firmware versions prior to V2.0
1578 * read and discard unused CRC byte otherwise
1579 * DMA reads are misaligned.
9d8dc3e5
ND		 1580 */
1581 data->T5_msg_size = mxt_obj_size(object);
1582 } else {
1583 /* CRC not enabled, so skip last byte */
1584 data->T5_msg_size = mxt_obj_size(object) - 1;
1585 }
b9b05a89 1586 data->T5_address = object->start_address;
041fa159 1587 break;
fdf80421
DK		 1588 case MXT_GEN_COMMAND_T6:
1589 data->T6_reportid = min_id;
a4a2ef46 1590 data->T6_address = object->start_address;
fdf80421 1591 break;
4ce6fa01
ND		 1592 case MXT_GEN_POWER_T7:
1593 data->T7_address = object->start_address;
1594 break;
333e5a9a 1595 case MXT_TOUCH_MULTI_T9:
b23157dc 1596 data->multitouch = MXT_TOUCH_MULTI_T9;
333e5a9a
DK		 1597 data->T9_reportid_min = min_id;
1598 data->T9_reportid_max = max_id;
9d8dc3e5
ND		 1599 data->num_touchids = object->num_report_ids
1600 * mxt_obj_instances(object);
1601 break;
1602 case MXT_SPT_MESSAGECOUNT_T44:
1603 data->T44_address = object->start_address;
333e5a9a 1604 break;
22dfab7f
DK		 1605 case MXT_SPT_GPIOPWM_T19:
1606 data->T19_reportid = min_id;
1607 break;
b23157dc
ND		 1608 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1609 data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1610 data->T100_reportid_min = min_id;
1611 data->T100_reportid_max = max_id;
1612 /* first two report IDs reserved */
1613 data->num_touchids = object->num_report_ids - 2;
1614 break;
4cf51c38 1615 }
4ce6fa01
ND		 1616
1617 end_address = object->start_address
1618 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1619
1620 if (end_address >= data->mem_size)
1621 data->mem_size = end_address + 1;
4cf51c38
JS		 1622 }
1623
9d8dc3e5
ND		 1624 /* Store maximum reportid */
1625 data->max_reportid = reportid;
1626
1627 /* If T44 exists, T5 position has to be directly after */
1628 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1629 dev_err(&client->dev, "Invalid T44 position\n");
1630 error = -EINVAL;
1631 goto free_object_table;
1632 }
1633
1634 data->msg_buf = kcalloc(data->max_reportid,
1635 data->T5_msg_size, GFP_KERNEL);
5f3f9bc2
ND		 1636 if (!data->msg_buf) {
1637 dev_err(&client->dev, "Failed to allocate message buffer\n");
1638 error = -ENOMEM;
1639 goto free_object_table;
1640 }
1641
dd24dcf5
ND		 1642 data->object_table = object_table;
1643
4cf51c38 1644 return 0;
4cf51c38 1645
5f3f9bc2
ND		 1646free_object_table:
1647 mxt_free_object_table(data);
1648 return error;
7d4fa100
DK		 1649}
1650
61dc1aba
ND		 1651static int mxt_read_t9_resolution(struct mxt_data *data)
1652{
1653 struct i2c_client *client = data->client;
1654 int error;
1655 struct t9_range range;
1656 unsigned char orient;
1657 struct mxt_object *object;
1658
1659 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1660 if (!object)
1661 return -EINVAL;
1662
1663 error = __mxt_read_reg(client,
1664 object->start_address + MXT_T9_RANGE,
1665 sizeof(range), &range);
1666 if (error)
1667 return error;
1668
1669 le16_to_cpus(&range.x);
1670 le16_to_cpus(&range.y);
1671
1672 error = __mxt_read_reg(client,
1673 object->start_address + MXT_T9_ORIENT,
1674 1, &orient);
1675 if (error)
1676 return error;
1677
1678 /* Handle default values */
1679 if (range.x == 0)
1680 range.x = 1023;
1681
1682 if (range.y == 0)
1683 range.y = 1023;
1684
f3889ed1 1685 if (orient & MXT_T9_ORIENT_SWITCH) {
61dc1aba
ND		 1686 data->max_x = range.y;
1687 data->max_y = range.x;
1688 } else {
1689 data->max_x = range.x;
1690 data->max_y = range.y;
1691 }
1692
1693 dev_dbg(&client->dev,
1694 "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1695
1696 return 0;
1697}
1698
b23157dc
ND		 1699static int mxt_read_t100_config(struct mxt_data *data)
1700{
1701 struct i2c_client *client = data->client;
1702 int error;
1703 struct mxt_object *object;
1704 u16 range_x, range_y;
1705 u8 cfg, tchaux;
1706 u8 aux;
1707
1708 object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1709 if (!object)
1710 return -EINVAL;
1711
1712 error = __mxt_read_reg(client,
1713 object->start_address + MXT_T100_XRANGE,
1714 sizeof(range_x), &range_x);
1715 if (error)
1716 return error;
1717
1718 le16_to_cpus(&range_x);
1719
1720 error = __mxt_read_reg(client,
1721 object->start_address + MXT_T100_YRANGE,
1722 sizeof(range_y), &range_y);
1723 if (error)
1724 return error;
1725
1726 le16_to_cpus(&range_y);
1727
1728 error = __mxt_read_reg(client,
1729 object->start_address + MXT_T100_CFG1,
1730 1, &cfg);
1731 if (error)
1732 return error;
1733
1734 error = __mxt_read_reg(client,
1735 object->start_address + MXT_T100_TCHAUX,
1736 1, &tchaux);
1737 if (error)
1738 return error;
1739
1740 /* Handle default values */
1741 if (range_x == 0)
1742 range_x = 1023;
1743
1744 if (range_y == 0)
1745 range_y = 1023;
1746
1747 if (cfg & MXT_T100_CFG_SWITCHXY) {
1748 data->max_x = range_y;
1749 data->max_y = range_x;
1750 } else {
1751 data->max_x = range_x;
1752 data->max_y = range_y;
1753 }
1754
1755 /* allocate aux bytes */
1756 aux = 6;
1757
1758 if (tchaux & MXT_T100_TCHAUX_VECT)
1759 data->t100_aux_vect = aux++;
1760
1761 if (tchaux & MXT_T100_TCHAUX_AMPL)
1762 data->t100_aux_ampl = aux++;
1763
1764 if (tchaux & MXT_T100_TCHAUX_AREA)
1765 data->t100_aux_area = aux++;
1766
1767 dev_dbg(&client->dev,
1768 "T100 aux mappings vect:%u ampl:%u area:%u\n",
1769 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
1770
1771 dev_info(&client->dev,
1772 "T100 Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1773
1774 return 0;
1775}
1776
7a53d609
ND		 1777static int mxt_input_open(struct input_dev *dev);
1778static void mxt_input_close(struct input_dev *dev);
1779
b6d2d328
SS		 1780static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
1781 struct mxt_data *data)
1782{
1783 const struct mxt_platform_data *pdata = data->pdata;
1784 int i;
1785
1786 input_dev->name = "Atmel maXTouch Touchpad";
1787
1788 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1789
1790 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1791 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1792 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1793 MXT_PIXELS_PER_MM);
1794 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1795 MXT_PIXELS_PER_MM);
1796
1797 for (i = 0; i < pdata->t19_num_keys; i++)
1798 if (pdata->t19_keymap[i] != KEY_RESERVED)
1799 input_set_capability(input_dev, EV_KEY,
1800 pdata->t19_keymap[i]);
1801}
1802
b23157dc 1803static int mxt_initialize_input_device(struct mxt_data *data)
7a53d609 1804{
7a53d609 1805 const struct mxt_platform_data *pdata = data->pdata;
b6d2d328 1806 struct device *dev = &data->client->dev;
7a53d609
ND		 1807 struct input_dev *input_dev;
1808 int error;
1809 unsigned int num_mt_slots;
1810 unsigned int mt_flags = 0;
7a53d609 1811
b23157dc
ND		 1812 switch (data->multitouch) {
1813 case MXT_TOUCH_MULTI_T9:
1814 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1815 error = mxt_read_t9_resolution(data);
1816 if (error)
1817 dev_warn(dev, "Failed to initialize T9 resolution\n");
1818 break;
1819
1820 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1821 num_mt_slots = data->num_touchids;
1822 error = mxt_read_t100_config(data);
1823 if (error)
1824 dev_warn(dev, "Failed to read T100 config\n");
1825 break;
1826
1827 default:
1828 dev_err(dev, "Invalid multitouch object\n");
1829 return -EINVAL;
1830 }
7a53d609
ND		 1831
1832 input_dev = input_allocate_device();
1833 if (!input_dev) {
1834 dev_err(dev, "Failed to allocate memory\n");
1835 return -ENOMEM;
1836 }
1837
1838 input_dev->name = "Atmel maXTouch Touchscreen";
1839 input_dev->phys = data->phys;
1840 input_dev->id.bustype = BUS_I2C;
1841 input_dev->dev.parent = dev;
1842 input_dev->open = mxt_input_open;
1843 input_dev->close = mxt_input_close;
1844
b23157dc 1845 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
7a53d609 1846
7a53d609 1847 /* For single touch */
b23157dc
ND		 1848 input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
1849 input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
1850
1851 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1852 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1853 data->t100_aux_ampl)) {
1854 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
1855 }
7a53d609 1856
b6d2d328
SS		 1857 /* If device has buttons we assume it is a touchpad */
1858 if (pdata->t19_num_keys) {
1859 mxt_set_up_as_touchpad(input_dev, data);
1860 mt_flags |= INPUT_MT_POINTER;
1861 }
1862
7a53d609 1863 /* For multi touch */
7a53d609
ND		 1864 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1865 if (error) {
1866 dev_err(dev, "Error %d initialising slots\n", error);
1867 goto err_free_mem;
1868 }
1869
b23157dc
ND		 1870 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
1871 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
1872 0, MT_TOOL_MAX, 0, 0);
1873 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
1874 MXT_DISTANCE_ACTIVE_TOUCH,
1875 MXT_DISTANCE_HOVERING,
1876 0, 0);
1877 }
1878
7a53d609
ND		 1879 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1880 0, data->max_x, 0, 0);
1881 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1882 0, data->max_y, 0, 0);
b23157dc
ND		 1883
1884 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1885 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1886 data->t100_aux_area)) {
1887 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1888 0, MXT_MAX_AREA, 0, 0);
1889 }
1890
1891 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1892 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1893 data->t100_aux_ampl)) {
1894 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1895 0, 255, 0, 0);
1896 }
1897
1898 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1899 data->t100_aux_vect) {
1900 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1901 0, 255, 0, 0);
1902 }
1903
1904 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1905 data->t100_aux_ampl) {
1906 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1907 0, 255, 0, 0);
1908 }
1909
1910 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1911 data->t100_aux_vect) {
1912 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1913 0, 255, 0, 0);
1914 }
7a53d609
ND		 1915
1916 input_set_drvdata(input_dev, data);
1917
1918 error = input_register_device(input_dev);
1919 if (error) {
1920 dev_err(dev, "Error %d registering input device\n", error);
1921 goto err_free_mem;
1922 }
1923
1924 data->input_dev = input_dev;
1925
1926 return 0;
1927
1928err_free_mem:
1929 input_free_device(input_dev);
1930 return error;
1931}
1932
50a77c65
ND		 1933static int mxt_configure_objects(struct mxt_data *data,
1934 const struct firmware *cfg);
1935
1936static void mxt_config_cb(const struct firmware *cfg, void *ctx)
1937{
1938 mxt_configure_objects(ctx, cfg);
efdbd7ae 1939 release_firmware(cfg);
50a77c65
ND		 1940}
1941
7686b108 1942static int mxt_initialize(struct mxt_data *data)
4cf51c38
JS		 1943{
1944 struct i2c_client *client = data->client;
6cd1ab0f 1945 int recovery_attempts = 0;
4cf51c38 1946 int error;
4cf51c38 1947
6cd1ab0f
DT		 1948 while (1) {
1949 error = mxt_get_info(data);
1950 if (!error)
1951 break;
1952
1953 /* Check bootloader state */
1954 error = mxt_probe_bootloader(data, false);
8efaa5e5 1955 if (error) {
6cd1ab0f
DT		 1956 dev_info(&client->dev, "Trying alternate bootloader address\n");
1957 error = mxt_probe_bootloader(data, true);
1958 if (error) {
8efaa5e5
ND		 1959 /* Chip is not in appmode or bootloader mode */
1960 return error;
1961 }
6cd1ab0f 1962 }
a9fdd1e6 1963
6cd1ab0f
DT		 1964 /* OK, we are in bootloader, see if we can recover */
1965 if (++recovery_attempts > 1) {
1966 dev_err(&client->dev, "Could not recover from bootloader mode\n");
1967 /*
1968 * We can reflash from this state, so do not
1969 * abort initialization.
1970 */
1971 data->in_bootloader = true;
1972 return 0;
8efaa5e5 1973 }
6cd1ab0f
DT		 1974
1975 /* Attempt to exit bootloader into app mode */
1976 mxt_send_bootloader_cmd(data, false);
1977 msleep(MXT_FW_RESET_TIME);
a9fdd1e6 1978 }
4cf51c38 1979
4cf51c38 1980 /* Get object table information */
7686b108 1981 error = mxt_get_object_table(data);
7bed6805
ND		 1982 if (error) {
1983 dev_err(&client->dev, "Error %d reading object table\n", error);
dd24dcf5 1984 return error;
7bed6805 1985 }
4cf51c38 1986
041fa159 1987 error = mxt_acquire_irq(data);
dd24dcf5
ND		 1988 if (error)
1989 goto err_free_object_table;
1990
6cd1ab0f
DT		 1991 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
1992 &client->dev, GFP_KERNEL, data,
1993 mxt_config_cb);
1994 if (error) {
1995 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
1996 error);
1997 goto err_free_object_table;
1998 }
50a77c65
ND		 1999
2000 return 0;
2001
2002err_free_object_table:
2003 mxt_free_object_table(data);
2004 return error;
2005}
2006
7f3884f7
ND		 2007static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2008{
2009 struct device *dev = &data->client->dev;
2010 int error;
2011 struct t7_config *new_config;
2012 struct t7_config deepsleep = { .active = 0, .idle = 0 };
2013
2014 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2015 new_config = &deepsleep;
2016 else
2017 new_config = &data->t7_cfg;
2018
2019 error = __mxt_write_reg(data->client, data->T7_address,
2020 sizeof(data->t7_cfg), new_config);
2021 if (error)
2022 return error;
2023
2024 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2025 new_config->active, new_config->idle);
2026
2027 return 0;
2028}
2029
2030static int mxt_init_t7_power_cfg(struct mxt_data *data)
2031{
2032 struct device *dev = &data->client->dev;
2033 int error;
2034 bool retry = false;
2035
2036recheck:
2037 error = __mxt_read_reg(data->client, data->T7_address,
2038 sizeof(data->t7_cfg), &data->t7_cfg);
2039 if (error)
2040 return error;
2041
2042 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2043 if (!retry) {
2044 dev_dbg(dev, "T7 cfg zero, resetting\n");
2045 mxt_soft_reset(data);
2046 retry = true;
2047 goto recheck;
2048 } else {
2049 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2050 data->t7_cfg.active = 20;
2051 data->t7_cfg.idle = 100;
2052 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2053 }
2054 }
2055
2056 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2057 data->t7_cfg.active, data->t7_cfg.idle);
2058 return 0;
2059}
2060
50a77c65
ND		 2061static int mxt_configure_objects(struct mxt_data *data,
2062 const struct firmware *cfg)
2063{
2064 struct device *dev = &data->client->dev;
2065 struct mxt_info *info = &data->info;
2066 int error;
2067
7f3884f7
ND		 2068 error = mxt_init_t7_power_cfg(data);
2069 if (error) {
2070 dev_err(dev, "Failed to initialize power cfg\n");
2071 return error;
2072 }
2073
50a77c65
ND		 2074 if (cfg) {
2075 error = mxt_update_cfg(data, cfg);
2076 if (error)
2077 dev_warn(dev, "Error %d updating config\n", error);
7bed6805 2078 }
4cf51c38 2079
b23157dc
ND		 2080 if (data->multitouch) {
2081 error = mxt_initialize_input_device(data);
2082 if (error)
2083 return error;
2084 } else {
2085 dev_warn(dev, "No touch object detected\n");
2086 }
4cf51c38 2087
50a77c65 2088 dev_info(dev,
61dc1aba
ND		 2089 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
2090 info->family_id, info->variant_id, info->version >> 4,
2091 info->version & 0xf, info->build, info->object_num);
4cf51c38
JS		 2092
2093 return 0;
2094}
2095
b19fc9ec
DK		 2096/* Firmware Version is returned as Major.Minor.Build */
2097static ssize_t mxt_fw_version_show(struct device *dev,
2098 struct device_attribute *attr, char *buf)
2099{
2100 struct mxt_data *data = dev_get_drvdata(dev);
2101 struct mxt_info *info = &data->info;
2102 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
2103 info->version >> 4, info->version & 0xf, info->build);
2104}
2105
2106/* Hardware Version is returned as FamilyID.VariantID */
2107static ssize_t mxt_hw_version_show(struct device *dev,
2108 struct device_attribute *attr, char *buf)
2109{
2110 struct mxt_data *data = dev_get_drvdata(dev);
2111 struct mxt_info *info = &data->info;
2112 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
2113 info->family_id, info->variant_id);
2114}
2115
794eb67e
DK		 2116static ssize_t mxt_show_instance(char *buf, int count,
2117 struct mxt_object *object, int instance,
2118 const u8 *val)
2119{
2120 int i;
2121
1e0c0c5b 2122 if (mxt_obj_instances(object) > 1)
794eb67e
DK		 2123 count += scnprintf(buf + count, PAGE_SIZE - count,
2124 "Instance %u\n", instance);
2125
1e0c0c5b 2126 for (i = 0; i < mxt_obj_size(object); i++)
794eb67e
DK		 2127 count += scnprintf(buf + count, PAGE_SIZE - count,
2128 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
2129 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
2130
2131 return count;
2132}
2133
7686b108 2134static ssize_t mxt_object_show(struct device *dev,
4cf51c38
JS		 2135 struct device_attribute *attr, char *buf)
2136{
7686b108
IV		 2137 struct mxt_data *data = dev_get_drvdata(dev);
2138 struct mxt_object *object;
4cf51c38
JS		 2139 int count = 0;
2140 int i, j;
2141 int error;
43a91d51 2142 u8 *obuf;
4cf51c38 2143
43a91d51
DK		 2144 /* Pre-allocate buffer large enough to hold max sized object. */
2145 obuf = kmalloc(256, GFP_KERNEL);
2146 if (!obuf)
2147 return -ENOMEM;
4cf51c38 2148
43a91d51 2149 error = 0;
4cf51c38
JS		 2150 for (i = 0; i < data->info.object_num; i++) {
2151 object = data->object_table + i;
2152
91630955 2153 if (!mxt_object_readable(object->type))
4cf51c38 2154 continue;
4cf51c38 2155
91630955
DK		 2156 count += scnprintf(buf + count, PAGE_SIZE - count,
2157 "T%u:\n", object->type);
4cf51c38 2158
1e0c0c5b
DK		 2159 for (j = 0; j < mxt_obj_instances(object); j++) {
2160 u16 size = mxt_obj_size(object);
794eb67e 2161 u16 addr = object->start_address + j * size;
43a91d51 2162
794eb67e 2163 error = __mxt_read_reg(data->client, addr, size, obuf);
4cf51c38 2164 if (error)
794eb67e 2165 goto done;
4cf51c38 2166
794eb67e 2167 count = mxt_show_instance(buf, count, object, j, obuf);
4cf51c38 2168 }
4cf51c38
JS		 2169 }
2170
794eb67e 2171done:
43a91d51
DK		 2172 kfree(obuf);
2173 return error ?: count;
4cf51c38
JS		 2174}
2175
f2ac6cb9
ND		 2176static int mxt_check_firmware_format(struct device *dev,
2177 const struct firmware *fw)
2178{
2179 unsigned int pos = 0;
2180 char c;
2181
2182 while (pos < fw->size) {
2183 c = *(fw->data + pos);
2184
2185 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2186 return 0;
2187
2188 pos++;
2189 }
2190
2191 /*
2192 * To convert file try:
2193 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2194 */
2195 dev_err(dev, "Aborting: firmware file must be in binary format\n");
2196
2197 return -EINVAL;
2198}
2199
7686b108 2200static int mxt_load_fw(struct device *dev, const char *fn)
4cf51c38 2201{
7686b108 2202 struct mxt_data *data = dev_get_drvdata(dev);
4cf51c38
JS		 2203 const struct firmware *fw = NULL;
2204 unsigned int frame_size;
2205 unsigned int pos = 0;
f943c74a 2206 unsigned int retry = 0;
f477c758 2207 unsigned int frame = 0;
4cf51c38
JS		 2208 int ret;
2209
2210 ret = request_firmware(&fw, fn, dev);
2211 if (ret) {
2212 dev_err(dev, "Unable to open firmware %s\n", fn);
2213 return ret;
2214 }
2215
f2ac6cb9
ND		 2216 /* Check for incorrect enc file */
2217 ret = mxt_check_firmware_format(dev, fw);
2218 if (ret)
2219 goto release_firmware;
2220
a9fdd1e6
ND		 2221 if (!data->in_bootloader) {
2222 /* Change to the bootloader mode */
2223 data->in_bootloader = true;
d79e7e47 2224
a9fdd1e6
ND		 2225 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2226 MXT_BOOT_VALUE, false);
2227 if (ret)
2228 goto release_firmware;
a4a2ef46 2229
a9fdd1e6 2230 msleep(MXT_RESET_TIME);
8efaa5e5
ND		 2231
2232 /* Do not need to scan since we know family ID */
2233 ret = mxt_lookup_bootloader_address(data, 0);
2234 if (ret)
2235 goto release_firmware;
58e4aeee
SW		 2236
2237 mxt_free_input_device(data);
2238 mxt_free_object_table(data);
8efaa5e5
ND		 2239 } else {
2240 enable_irq(data->irq);
a9fdd1e6 2241 }
4cf51c38 2242
d79e7e47
BL		 2243 reinit_completion(&data->bl_completion);
2244
385deb96
ND		 2245 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2246 if (ret) {
2247 /* Bootloader may still be unlocked from previous attempt */
2248 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2249 if (ret)
2250 goto disable_irq;
2251 } else {
2252 dev_info(dev, "Unlocking bootloader\n");
4cf51c38 2253
385deb96 2254 /* Unlock bootloader */
8efaa5e5 2255 ret = mxt_send_bootloader_cmd(data, true);
385deb96
ND		 2256 if (ret)
2257 goto disable_irq;
2258 }
4cf51c38
JS		 2259
2260 while (pos < fw->size) {
385deb96 2261 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
4cf51c38 2262 if (ret)
d79e7e47 2263 goto disable_irq;
4cf51c38
JS		 2264
2265 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2266
f943c74a 2267 /* Take account of CRC bytes */
4cf51c38
JS		 2268 frame_size += 2;
2269
2270 /* Write one frame to device */
f28a842d
ND		 2271 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2272 if (ret)
2273 goto disable_irq;
4cf51c38 2274
385deb96 2275 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
f943c74a
ND		 2276 if (ret) {
2277 retry++;
2278
2279 /* Back off by 20ms per retry */
2280 msleep(retry * 20);
4cf51c38 2281
f943c74a
ND		 2282 if (retry > 20) {
2283 dev_err(dev, "Retry count exceeded\n");
2284 goto disable_irq;
2285 }
2286 } else {
2287 retry = 0;
2288 pos += frame_size;
f477c758 2289 frame++;
f943c74a 2290 }
4cf51c38 2291
f477c758
ND		 2292 if (frame % 50 == 0)
2293 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2294 frame, pos, fw->size);
4cf51c38
JS		 2295 }
2296
a0434b75 2297 /* Wait for flash. */
a4a2ef46
IV		 2298 ret = mxt_wait_for_completion(data, &data->bl_completion,
2299 MXT_FW_RESET_TIME);
a0434b75
BL		 2300 if (ret)
2301 goto disable_irq;
2302
f477c758
ND		 2303 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2304
a0434b75
BL		 2305 /*
2306 * Wait for device to reset. Some bootloader versions do not assert
2307 * the CHG line after bootloading has finished, so ignore potential
2308 * errors.
2309 */
a4a2ef46 2310 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
a0434b75 2311
d79e7e47
BL		 2312 data->in_bootloader = false;
2313
2314disable_irq:
2315 disable_irq(data->irq);
a4a2ef46 2316release_firmware:
4cf51c38 2317 release_firmware(fw);
4cf51c38
JS		 2318 return ret;
2319}
2320
7686b108 2321static ssize_t mxt_update_fw_store(struct device *dev,
4cf51c38
JS		 2322 struct device_attribute *attr,
2323 const char *buf, size_t count)
2324{
7686b108 2325 struct mxt_data *data = dev_get_drvdata(dev);
4cf51c38
JS		 2326 int error;
2327
7686b108 2328 error = mxt_load_fw(dev, MXT_FW_NAME);
4cf51c38
JS		 2329 if (error) {
2330 dev_err(dev, "The firmware update failed(%d)\n", error);
2331 count = error;
2332 } else {
7bed6805
ND		 2333 dev_info(dev, "The firmware update succeeded\n");
2334
dd24dcf5 2335 error = mxt_initialize(data);
d79e7e47
BL		 2336 if (error)
2337 return error;
2338 }
08960a07 2339
4cf51c38
JS		 2340 return count;
2341}
2342
b19fc9ec
DK		 2343static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2344static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
71b3e938
DK		 2345static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2346static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
4cf51c38 2347
7686b108 2348static struct attribute *mxt_attrs[] = {
b19fc9ec
DK		 2349 &dev_attr_fw_version.attr,
2350 &dev_attr_hw_version.attr,
4cf51c38
JS		 2351 &dev_attr_object.attr,
2352 &dev_attr_update_fw.attr,
2353 NULL
2354};
2355
7686b108
IV		 2356static const struct attribute_group mxt_attr_group = {
2357 .attrs = mxt_attrs,
4cf51c38
JS		 2358};
2359
7686b108 2360static void mxt_start(struct mxt_data *data)
4cf51c38 2361{
7f3884f7
ND		 2362 switch (data->pdata->suspend_mode) {
2363 case MXT_SUSPEND_T9_CTRL:
2364 mxt_soft_reset(data);
2365
2366 /* Touch enable */
2367 /* 0x83 = SCANEN | RPTEN | ENABLE */
2368 mxt_write_object(data,
2369 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
2370 break;
2371
2372 case MXT_SUSPEND_DEEP_SLEEP:
2373 default:
2374 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2375
2376 /* Recalibrate since chip has been in deep sleep */
2377 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
2378 break;
2379 }
2380
4cf51c38
JS		 2381}
2382
7686b108 2383static void mxt_stop(struct mxt_data *data)
4cf51c38 2384{
7f3884f7
ND		 2385 switch (data->pdata->suspend_mode) {
2386 case MXT_SUSPEND_T9_CTRL:
2387 /* Touch disable */
2388 mxt_write_object(data,
2389 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
2390 break;
2391
2392 case MXT_SUSPEND_DEEP_SLEEP:
2393 default:
2394 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
2395 break;
2396 }
4cf51c38
JS		 2397}
2398
7686b108 2399static int mxt_input_open(struct input_dev *dev)
4cf51c38 2400{
7686b108 2401 struct mxt_data *data = input_get_drvdata(dev);
4cf51c38 2402
7686b108 2403 mxt_start(data);
4cf51c38
JS		 2404
2405 return 0;
2406}
2407
7686b108 2408static void mxt_input_close(struct input_dev *dev)
4cf51c38 2409{
7686b108 2410 struct mxt_data *data = input_get_drvdata(dev);
4cf51c38 2411
7686b108 2412 mxt_stop(data);
4cf51c38
JS		 2413}
2414
78188be3 2415#ifdef CONFIG_OF
4f8d8088 2416static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
78188be3
SW		 2417{
2418 struct mxt_platform_data *pdata;
20447664 2419 struct device_node *np = client->dev.of_node;
78188be3 2420 u32 *keymap;
20447664 2421 int proplen, ret;
78188be3 2422
20447664 2423 if (!np)
4f8d8088 2424 return ERR_PTR(-ENOENT);
78188be3
SW		 2425
2426 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
2427 if (!pdata)
2428 return ERR_PTR(-ENOMEM);
2429
20447664 2430 if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
78188be3
SW		 2431 pdata->t19_num_keys = proplen / sizeof(u32);
2432
2433 keymap = devm_kzalloc(&client->dev,
2434 pdata->t19_num_keys * sizeof(keymap[0]),
2435 GFP_KERNEL);
2436 if (!keymap)
2437 return ERR_PTR(-ENOMEM);
2438
20447664
ND		 2439 ret = of_property_read_u32_array(np, "linux,gpio-keymap",
2440 keymap, pdata->t19_num_keys);
2441 if (ret)
2442 dev_warn(&client->dev,
2443 "Couldn't read linux,gpio-keymap: %d\n", ret);
78188be3
SW		 2444
2445 pdata->t19_keymap = keymap;
2446 }
2447
7f3884f7
ND		 2448 pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
2449
78188be3
SW		 2450 return pdata;
2451}
2452#else
4f8d8088 2453static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
78188be3 2454{
4f8d8088
DT		 2455 return ERR_PTR(-ENOENT);
2456}
2457#endif
2458
2459#ifdef CONFIG_ACPI
2460
2461struct mxt_acpi_platform_data {
2462 const char *hid;
2463 struct mxt_platform_data pdata;
2464};
2465
2466static unsigned int samus_touchpad_buttons[] = {
2467 KEY_RESERVED,
2468 KEY_RESERVED,
2469 KEY_RESERVED,
2470 BTN_LEFT
2471};
2472
2473static struct mxt_acpi_platform_data samus_platform_data[] = {
2474 {
2475 /* Touchpad */
2476 .hid = "ATML0000",
2477 .pdata = {
2478 .t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons),
2479 .t19_keymap = samus_touchpad_buttons,
2480 },
2481 },
2482 {
2483 /* Touchscreen */
2484 .hid = "ATML0001",
2485 },
2486 { }
2487};
2488
2489static const struct dmi_system_id mxt_dmi_table[] = {
2490 {
2491 /* 2015 Google Pixel */
2492 .ident = "Chromebook Pixel 2",
2493 .matches = {
2494 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
2495 DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
2496 },
2497 .driver_data = samus_platform_data,
2498 },
2499 { }
2500};
2501
2502static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
2503{
2504 struct acpi_device *adev;
2505 const struct dmi_system_id *system_id;
2506 const struct mxt_acpi_platform_data *acpi_pdata;
2507
2508 /*
2509 * Ignore ACPI devices representing bootloader mode.
2510 *
2511 * This is a bit of a hack: Google Chromebook BIOS creates ACPI
2512 * devices for both application and bootloader modes, but we are
2513 * interested in application mode only (if device is in bootloader
2514 * mode we'll end up switching into application anyway). So far
2515 * application mode addresses were all above 0x40, so we'll use it
2516 * as a threshold.
2517 */
2518 if (client->addr < 0x40)
2519 return ERR_PTR(-ENXIO);
2520
2521 adev = ACPI_COMPANION(&client->dev);
2522 if (!adev)
2523 return ERR_PTR(-ENOENT);
2524
2525 system_id = dmi_first_match(mxt_dmi_table);
2526 if (!system_id)
2527 return ERR_PTR(-ENOENT);
2528
2529 acpi_pdata = system_id->driver_data;
2530 if (!acpi_pdata)
2531 return ERR_PTR(-ENOENT);
2532
2533 while (acpi_pdata->hid) {
2534 if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid))
2535 return &acpi_pdata->pdata;
2536
2537 acpi_pdata++;
2538 }
2539
2540 return ERR_PTR(-ENOENT);
2541}
2542#else
2543static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
2544{
2545 return ERR_PTR(-ENOENT);
78188be3
SW		 2546}
2547#endif
2548
4f8d8088
DT		 2549static const struct mxt_platform_data *
2550mxt_get_platform_data(struct i2c_client *client)
2551{
2552 const struct mxt_platform_data *pdata;
2553
2554 pdata = dev_get_platdata(&client->dev);
2555 if (pdata)
2556 return pdata;
2557
2558 pdata = mxt_parse_dt(client);
2559 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
2560 return pdata;
2561
2562 pdata = mxt_parse_acpi(client);
2563 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
2564 return pdata;
2565
2566 dev_err(&client->dev, "No platform data specified\n");
2567 return ERR_PTR(-EINVAL);
2568}
2569
78188be3 2570static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
4cf51c38 2571{
7686b108 2572 struct mxt_data *data;
78188be3 2573 const struct mxt_platform_data *pdata;
4cf51c38
JS		 2574 int error;
2575
4f8d8088
DT		 2576 pdata = mxt_get_platform_data(client);
2577 if (IS_ERR(pdata))
2578 return PTR_ERR(pdata);
4cf51c38 2579
7686b108 2580 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
7a53d609 2581 if (!data) {
4cf51c38 2582 dev_err(&client->dev, "Failed to allocate memory\n");
7a53d609 2583 return -ENOMEM;
4cf51c38
JS		 2584 }
2585
ec02ac2b
DK		 2586 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
2587 client->adapter->nr, client->addr);
22dfab7f 2588
910d8051 2589 data->client = client;
910d8051
JS		 2590 data->pdata = pdata;
2591 data->irq = client->irq;
7a53d609 2592 i2c_set_clientdata(client, data);
910d8051 2593
d79e7e47 2594 init_completion(&data->bl_completion);
a4a2ef46 2595 init_completion(&data->reset_completion);
c3f78043 2596 init_completion(&data->crc_completion);
d79e7e47 2597
dd24dcf5
ND		 2598 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
2599 pdata->irqflags | IRQF_ONESHOT,
2600 client->name, data);
2601 if (error) {
2602 dev_err(&client->dev, "Failed to register interrupt\n");
2603 goto err_free_mem;
2604 }
2605
2606 disable_irq(client->irq);
2607
cb159115
DK		 2608 error = mxt_initialize(data);
2609 if (error)
7a53d609 2610 goto err_free_irq;
4cf51c38 2611
7686b108 2612 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
7bed6805
ND		 2613 if (error) {
2614 dev_err(&client->dev, "Failure %d creating sysfs group\n",
2615 error);
7a53d609 2616 goto err_free_object;
7bed6805 2617 }
4cf51c38
JS		 2618
2619 return 0;
2620
4cf51c38 2621err_free_object:
58e4aeee 2622 mxt_free_input_device(data);
5f3f9bc2 2623 mxt_free_object_table(data);
dd24dcf5
ND		 2624err_free_irq:
2625 free_irq(client->irq, data);
4cf51c38 2626err_free_mem:
4cf51c38
JS		 2627 kfree(data);
2628 return error;
2629}
2630
e2619cf7 2631static int mxt_remove(struct i2c_client *client)
4cf51c38 2632{
7686b108 2633 struct mxt_data *data = i2c_get_clientdata(client);
4cf51c38 2634
7686b108 2635 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
4cf51c38 2636 free_irq(data->irq, data);
58e4aeee 2637 mxt_free_input_device(data);
5f3f9bc2 2638 mxt_free_object_table(data);
4cf51c38
JS		 2639 kfree(data);
2640
2641 return 0;
2642}
2643
02b6a58b 2644static int __maybe_unused mxt_suspend(struct device *dev)
4cf51c38 2645{
8b5fce06 2646 struct i2c_client *client = to_i2c_client(dev);
7686b108 2647 struct mxt_data *data = i2c_get_clientdata(client);
4cf51c38
JS		 2648 struct input_dev *input_dev = data->input_dev;
2649
50fabb02
PX		 2650 if (!input_dev)
2651 return 0;
2652
4cf51c38
JS		 2653 mutex_lock(&input_dev->mutex);
2654
2655 if (input_dev->users)
7686b108 2656 mxt_stop(data);
4cf51c38
JS		 2657
2658 mutex_unlock(&input_dev->mutex);
2659
2660 return 0;
2661}
2662
02b6a58b 2663static int __maybe_unused mxt_resume(struct device *dev)
4cf51c38 2664{
8b5fce06 2665 struct i2c_client *client = to_i2c_client(dev);
7686b108 2666 struct mxt_data *data = i2c_get_clientdata(client);
4cf51c38
JS		 2667 struct input_dev *input_dev = data->input_dev;
2668
50fabb02
PX		 2669 if (!input_dev)
2670 return 0;
2671
4cf51c38
JS		 2672 mutex_lock(&input_dev->mutex);
2673
2674 if (input_dev->users)
7686b108 2675 mxt_start(data);
4cf51c38
JS		 2676
2677 mutex_unlock(&input_dev->mutex);
2678
2679 return 0;
2680}
4cf51c38 2681
3a73c816
DK		 2682static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
2683
78188be3
SW		 2684static const struct of_device_id mxt_of_match[] = {
2685 { .compatible = "atmel,maxtouch", },
2686 {},
2687};
2688MODULE_DEVICE_TABLE(of, mxt_of_match);
2689
4f8d8088
DT		 2690#ifdef CONFIG_ACPI
2691static const struct acpi_device_id mxt_acpi_id[] = {
2692 { "ATML0000", 0 }, /* Touchpad */
2693 { "ATML0001", 0 }, /* Touchscreen */
2694 { }
2695};
2696MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
2697#endif
2698
7686b108 2699static const struct i2c_device_id mxt_id[] = {
4cf51c38 2700 { "qt602240_ts", 0 },
7686b108 2701 { "atmel_mxt_ts", 0 },
22dfab7f 2702 { "atmel_mxt_tp", 0 },
46ee2a05 2703 { "mXT224", 0 },
4cf51c38
JS		 2704 { }
2705};
7686b108 2706MODULE_DEVICE_TABLE(i2c, mxt_id);
4cf51c38 2707
7686b108 2708static struct i2c_driver mxt_driver = {
4cf51c38 2709 .driver = {
7686b108 2710 .name = "atmel_mxt_ts",
78188be3 2711 .of_match_table = of_match_ptr(mxt_of_match),
4f8d8088 2712 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
7686b108 2713 .pm = &mxt_pm_ops,
4cf51c38 2714 },
7686b108 2715 .probe = mxt_probe,
1cb0aa88 2716 .remove = mxt_remove,
7686b108 2717 .id_table = mxt_id,
4cf51c38
JS		 2718};
2719
1b92c1cf 2720module_i2c_driver(mxt_driver);
4cf51c38
JS		 2721
2722/* Module information */
2723MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
7686b108 2724MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
4cf51c38 2725MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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