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[deliverable/linux.git] / drivers / input / touchscreen / atmel_mxt_ts.c
1 /*
2 * Atmel maXTouch Touchscreen driver
3 *
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Copyright (C) 2011-2014 Atmel Corporation
6 * Copyright (C) 2012 Google, Inc.
7 *
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>
18 #include <linux/init.h>
19 #include <linux/completion.h>
20 #include <linux/delay.h>
21 #include <linux/firmware.h>
22 #include <linux/i2c.h>
23 #include <linux/i2c/atmel_mxt_ts.h>
24 #include <linux/input/mt.h>
25 #include <linux/interrupt.h>
26 #include <linux/of.h>
27 #include <linux/slab.h>
28
29 /* Version */
30 #define MXT_VER_20 20
31 #define MXT_VER_21 21
32 #define MXT_VER_22 22
33
34 /* Firmware files */
35 #define MXT_FW_NAME "maxtouch.fw"
36 #define MXT_CFG_NAME "maxtouch.cfg"
37 #define MXT_CFG_MAGIC "OBP_RAW V1"
38
39 /* Registers */
40 #define MXT_INFO 0x00
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
49
50 #define MXT_OBJECT_SIZE 6
51 #define MXT_INFO_CHECKSUM_SIZE 3
52 #define MXT_MAX_BLOCK_WRITE 256
53
54 /* Object types */
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
83 /* MXT_GEN_MESSAGE_T5 object */
84 #define MXT_RPTID_NOMSG 0xff
85
86 /* MXT_GEN_COMMAND_T6 field */
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
93 /* Define for T6 status byte */
94 #define MXT_T6_STATUS_RESET (1 << 7)
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)
100
101 /* MXT_GEN_POWER_T7 field */
102 struct 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
109
110 /* MXT_GEN_ACQUIRE_T8 field */
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
119 /* MXT_TOUCH_MULTI_T9 field */
120 #define MXT_T9_ORIENT 9
121 #define MXT_T9_RANGE 18
122
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
133 struct t9_range {
134 u16 x;
135 u16 y;
136 } __packed;
137
138 /* MXT_TOUCH_MULTI_T9 orient */
139 #define MXT_T9_ORIENT_SWITCH (1 << 0)
140
141 /* MXT_PROCI_GRIPFACE_T20 field */
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
171 /* MXT_SPT_COMMSCONFIG_T18 */
172 #define MXT_COMMS_CTRL 0
173 #define MXT_COMMS_CMD 1
174
175 /* MXT_SPT_CTECONFIG_T28 field */
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
181 #define MXT_CTE_VOLTAGE 5
182
183 #define MXT_VOLTAGE_DEFAULT 2700000
184 #define MXT_VOLTAGE_STEP 10000
185
186 /* Define for MXT_GEN_COMMAND_T6 */
187 #define MXT_BOOT_VALUE 0xa5
188 #define MXT_RESET_VALUE 0x01
189 #define MXT_BACKUP_VALUE 0x55
190
191 /* Delay times */
192 #define MXT_BACKUP_TIME 50 /* msec */
193 #define MXT_RESET_TIME 200 /* msec */
194 #define MXT_RESET_TIMEOUT 3000 /* msec */
195 #define MXT_CRC_TIMEOUT 1000 /* msec */
196 #define MXT_FW_RESET_TIME 3000 /* msec */
197 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
198
199 /* Command to unlock bootloader */
200 #define MXT_UNLOCK_CMD_MSB 0xaa
201 #define MXT_UNLOCK_CMD_LSB 0xdc
202
203 /* Bootloader mode status */
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
211 #define MXT_BOOT_EXTENDED_ID (1 << 5)
212 #define MXT_BOOT_ID_MASK 0x1f
213
214 /* Touchscreen absolute values */
215 #define MXT_MAX_AREA 0xff
216
217 #define MXT_PIXELS_PER_MM 20
218
219 struct mxt_info {
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
229 struct mxt_object {
230 u8 type;
231 u16 start_address;
232 u8 size_minus_one;
233 u8 instances_minus_one;
234 u8 num_report_ids;
235 } __packed;
236
237 /* Each client has this additional data */
238 struct mxt_data {
239 struct i2c_client *client;
240 struct input_dev *input_dev;
241 char phys[64]; /* device physical location */
242 const struct mxt_platform_data *pdata;
243 struct mxt_object *object_table;
244 struct mxt_info info;
245 unsigned int irq;
246 unsigned int max_x;
247 unsigned int max_y;
248 bool in_bootloader;
249 u16 mem_size;
250 u8 max_reportid;
251 u32 config_crc;
252 u32 info_crc;
253 u8 bootloader_addr;
254 u8 *msg_buf;
255 u8 t6_status;
256 bool update_input;
257 u8 last_message_count;
258 u8 num_touchids;
259 struct t7_config t7_cfg;
260
261 /* Cached parameters from object table */
262 u16 T5_address;
263 u8 T5_msg_size;
264 u8 T6_reportid;
265 u16 T6_address;
266 u16 T7_address;
267 u8 T9_reportid_min;
268 u8 T9_reportid_max;
269 u8 T19_reportid;
270 u16 T44_address;
271
272 /* for fw update in bootloader */
273 struct completion bl_completion;
274
275 /* for reset handling */
276 struct completion reset_completion;
277
278 /* for config update handling */
279 struct completion crc_completion;
280 };
281
282 static size_t mxt_obj_size(const struct mxt_object *obj)
283 {
284 return obj->size_minus_one + 1;
285 }
286
287 static size_t mxt_obj_instances(const struct mxt_object *obj)
288 {
289 return obj->instances_minus_one + 1;
290 }
291
292 static bool mxt_object_readable(unsigned int type)
293 {
294 switch (type) {
295 case MXT_GEN_COMMAND_T6:
296 case MXT_GEN_POWER_T7:
297 case MXT_GEN_ACQUIRE_T8:
298 case MXT_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:
319 return true;
320 default:
321 return false;
322 }
323 }
324
325 static void mxt_dump_message(struct mxt_data *data, u8 *message)
326 {
327 dev_dbg(&data->client->dev, "message: %*ph\n",
328 data->T5_msg_size, message);
329 }
330
331 static int mxt_wait_for_completion(struct mxt_data *data,
332 struct completion *comp,
333 unsigned int timeout_ms)
334 {
335 struct device *dev = &data->client->dev;
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
349 static 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);
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
373 static 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
396 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
397 {
398 u8 appmode = data->client->addr;
399 u8 bootloader;
400
401 switch (appmode) {
402 case 0x4a:
403 case 0x4b:
404 /* Chips after 1664S use different scheme */
405 if (retry || data->info.family_id >= 0xa2) {
406 bootloader = appmode - 0x24;
407 break;
408 }
409 /* Fall through for normal case */
410 case 0x4c:
411 case 0x4d:
412 case 0x5a:
413 case 0x5b:
414 bootloader = appmode - 0x26;
415 break;
416
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
428 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
429 {
430 struct device *dev = &data->client->dev;
431 int error;
432 u8 val;
433 bool crc_failure;
434
435 error = mxt_lookup_bootloader_address(data, alt_address);
436 if (error)
437 return error;
438
439 error = mxt_bootloader_read(data, &val, 1);
440 if (error)
441 return error;
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
452 static 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__);
460 return val;
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
473 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
474 bool wait)
475 {
476 struct device *dev = &data->client->dev;
477 u8 val;
478 int ret;
479
480 recheck:
481 if (wait) {
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 */
488 ret = mxt_wait_for_completion(data, &data->bl_completion,
489 MXT_FW_CHG_TIMEOUT);
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 */
497 dev_err(dev, "Update wait error %d\n", ret);
498 return ret;
499 }
500 }
501
502 ret = mxt_bootloader_read(data, &val, 1);
503 if (ret)
504 return ret;
505
506 if (state == MXT_WAITING_BOOTLOAD_CMD)
507 val = mxt_get_bootloader_version(data, val);
508
509 switch (state) {
510 case MXT_WAITING_BOOTLOAD_CMD:
511 case MXT_WAITING_FRAME_DATA:
512 case MXT_APP_CRC_FAIL:
513 val &= ~MXT_BOOT_STATUS_MASK;
514 break;
515 case MXT_FRAME_CRC_PASS:
516 if (val == MXT_FRAME_CRC_CHECK) {
517 goto recheck;
518 } else if (val == MXT_FRAME_CRC_FAIL) {
519 dev_err(dev, "Bootloader CRC fail\n");
520 return -EINVAL;
521 }
522 break;
523 default:
524 return -EINVAL;
525 }
526
527 if (val != state) {
528 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
529 val, state);
530 return -EINVAL;
531 }
532
533 return 0;
534 }
535
536 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
537 {
538 int ret;
539 u8 buf[2];
540
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 }
548
549 ret = mxt_bootloader_write(data, buf, 2);
550 if (ret)
551 return ret;
552
553 return 0;
554 }
555
556 static int __mxt_read_reg(struct i2c_client *client,
557 u16 reg, u16 len, void *val)
558 {
559 struct i2c_msg xfer[2];
560 u8 buf[2];
561 int ret;
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
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);
586 }
587
588 return ret;
589 }
590
591 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
592 const void *val)
593 {
594 u8 *buf;
595 size_t count;
596 int ret;
597
598 count = len + 2;
599 buf = kmalloc(count, GFP_KERNEL);
600 if (!buf)
601 return -ENOMEM;
602
603 buf[0] = reg & 0xff;
604 buf[1] = (reg >> 8) & 0xff;
605 memcpy(&buf[2], val, len);
606
607 ret = i2c_master_send(client, buf, count);
608 if (ret == count) {
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);
615 }
616
617 kfree(buf);
618 return ret;
619 }
620
621 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
622 {
623 return __mxt_write_reg(client, reg, 1, &val);
624 }
625
626 static struct mxt_object *
627 mxt_get_object(struct mxt_data *data, u8 type)
628 {
629 struct mxt_object *object;
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
638 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
639 return NULL;
640 }
641
642 static 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
675 static void mxt_input_button(struct mxt_data *data, u8 *message)
676 {
677 struct input_dev *input = data->input_dev;
678 const struct mxt_platform_data *pdata = data->pdata;
679 bool button;
680 int i;
681
682 /* Active-low switch */
683 for (i = 0; i < pdata->t19_num_keys; i++) {
684 if (pdata->t19_keymap[i] == KEY_RESERVED)
685 continue;
686 button = !(message[1] & (1 << i));
687 input_report_key(input, pdata->t19_keymap[i], button);
688 }
689 }
690
691 static void mxt_input_sync(struct mxt_data *data)
692 {
693 input_mt_report_pointer_emulation(data->input_dev,
694 data->pdata->t19_num_keys);
695 input_sync(data->input_dev);
696 }
697
698 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
699 {
700 struct device *dev = &data->client->dev;
701 struct input_dev *input_dev = data->input_dev;
702 int id;
703 u8 status;
704 int x;
705 int y;
706 int area;
707 int amplitude;
708
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));
713
714 /* Handle 10/12 bit switching */
715 if (data->max_x < 1024)
716 x >>= 2;
717 if (data->max_y < 1024)
718 y >>= 2;
719
720 area = message[5];
721 amplitude = message[6];
722
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,
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' : '.',
734 x, y, area, amplitude);
735
736 input_mt_slot(input_dev, id);
737
738 if (status & MXT_T9_DETECT) {
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);
747 mxt_input_sync(data);
748 }
749
750 /* Touch active */
751 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
752 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
753 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
754 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
755 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
756 } else {
757 /* Touch no longer active, close out slot */
758 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
759 }
760
761 data->update_input = true;
762 }
763
764 static int mxt_proc_message(struct mxt_data *data, u8 *message)
765 {
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;
790 }
791
792 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
793 {
794 struct device *dev = &data->client->dev;
795 int ret;
796 int i;
797 u8 num_valid = 0;
798
799 /* Safety check for msg_buf */
800 if (count > data->max_reportid)
801 return -EINVAL;
802
803 /* Process remaining messages if necessary */
804 ret = __mxt_read_reg(data->client, data->T5_address,
805 data->T5_msg_size * count, data->msg_buf);
806 if (ret) {
807 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
808 return ret;
809 }
810
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;
821 }
822
823 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
824 {
825 struct device *dev = &data->client->dev;
826 int ret;
827 u8 count, num_left;
828
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);
859 if (ret < 0)
860 goto end;
861 else if (ret != num_left)
862 dev_warn(dev, "Unexpected invalid message\n");
863 }
864
865 end:
866 if (data->update_input) {
867 mxt_input_sync(data);
868 data->update_input = false;
869 }
870
871 return IRQ_HANDLED;
872 }
873
874 static 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
898 static 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)
918 return IRQ_NONE;
919
920 total_handled += num_handled;
921
922 if (num_handled < 2)
923 break;
924 } while (total_handled < data->num_touchids);
925
926 update_count:
927 data->last_message_count = total_handled;
928
929 if (data->update_input) {
930 mxt_input_sync(data);
931 data->update_input = false;
932 }
933
934 return IRQ_HANDLED;
935 }
936
937 static 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
947 if (!data->object_table)
948 return IRQ_HANDLED;
949
950 if (data->T44_address) {
951 return mxt_process_messages_t44(data);
952 } else {
953 return mxt_process_messages(data);
954 }
955 }
956
957 static 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
989 static 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
1010 static 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
1028 static 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
1043 static 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
1067 /*
1068 * mxt_update_cfg - download configuration to chip
1069 *
1070 * Atmel Raw Config File Format
1071 *
1072 * The first four lines of the raw config file contain:
1073 * 1) Version
1074 * 2) Chip ID Information (first 7 bytes of device memory)
1075 * 3) Chip Information Block 24-bit CRC Checksum
1076 * 4) Chip Configuration 24-bit CRC Checksum
1077 *
1078 * The rest of the file consists of one line per object instance:
1079 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1080 *
1081 * <TYPE> - 2-byte object type as hex
1082 * <INSTANCE> - 2-byte object instance number as hex
1083 * <SIZE> - 2-byte object size as hex
1084 * <CONTENTS> - array of <SIZE> 1-byte hex values
1085 */
1086 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
1087 {
1088 struct device *dev = &data->client->dev;
1089 struct mxt_info cfg_info;
1090 struct mxt_object *object;
1091 int ret;
1092 int offset;
1093 int data_pos;
1094 int byte_offset;
1095 int i;
1096 int cfg_start_ofs;
1097 u32 info_crc, config_crc, calculated_crc;
1098 u8 *config_mem;
1099 size_t config_mem_size;
1100 unsigned int type, instance, size;
1101 u8 val;
1102 u16 reg;
1103
1104 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1105
1106 if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1107 dev_err(dev, "Unrecognised config file\n");
1108 ret = -EINVAL;
1109 goto release;
1110 }
1111
1112 data_pos = strlen(MXT_CFG_MAGIC);
1113
1114 /* Load information block and check */
1115 for (i = 0; i < sizeof(struct mxt_info); i++) {
1116 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1117 (unsigned char *)&cfg_info + i,
1118 &offset);
1119 if (ret != 1) {
1120 dev_err(dev, "Bad format\n");
1121 ret = -EINVAL;
1122 goto release;
1123 }
1124
1125 data_pos += offset;
1126 }
1127
1128 if (cfg_info.family_id != data->info.family_id) {
1129 dev_err(dev, "Family ID mismatch!\n");
1130 ret = -EINVAL;
1131 goto release;
1132 }
1133
1134 if (cfg_info.variant_id != data->info.variant_id) {
1135 dev_err(dev, "Variant ID mismatch!\n");
1136 ret = -EINVAL;
1137 goto release;
1138 }
1139
1140 /* Read CRCs */
1141 ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
1142 if (ret != 1) {
1143 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1144 ret = -EINVAL;
1145 goto release;
1146 }
1147 data_pos += offset;
1148
1149 ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
1150 if (ret != 1) {
1151 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1152 ret = -EINVAL;
1153 goto release;
1154 }
1155 data_pos += offset;
1156
1157 /*
1158 * The Info Block CRC is calculated over mxt_info and the object
1159 * table. If it does not match then we are trying to load the
1160 * configuration from a different chip or firmware version, so
1161 * the configuration CRC is invalid anyway.
1162 */
1163 if (info_crc == data->info_crc) {
1164 if (config_crc == 0 || data->config_crc == 0) {
1165 dev_info(dev, "CRC zero, attempting to apply config\n");
1166 } else if (config_crc == data->config_crc) {
1167 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1168 data->config_crc);
1169 ret = 0;
1170 goto release;
1171 } else {
1172 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1173 data->config_crc, config_crc);
1174 }
1175 } else {
1176 dev_warn(dev,
1177 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1178 data->info_crc, info_crc);
1179 }
1180
1181 /* Malloc memory to store configuration */
1182 cfg_start_ofs = MXT_OBJECT_START +
1183 data->info.object_num * sizeof(struct mxt_object) +
1184 MXT_INFO_CHECKSUM_SIZE;
1185 config_mem_size = data->mem_size - cfg_start_ofs;
1186 config_mem = kzalloc(config_mem_size, GFP_KERNEL);
1187 if (!config_mem) {
1188 dev_err(dev, "Failed to allocate memory\n");
1189 ret = -ENOMEM;
1190 goto release;
1191 }
1192
1193 while (data_pos < cfg->size) {
1194 /* Read type, instance, length */
1195 ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
1196 &type, &instance, &size, &offset);
1197 if (ret == 0) {
1198 /* EOF */
1199 break;
1200 } else if (ret != 3) {
1201 dev_err(dev, "Bad format: failed to parse object\n");
1202 ret = -EINVAL;
1203 goto release_mem;
1204 }
1205 data_pos += offset;
1206
1207 object = mxt_get_object(data, type);
1208 if (!object) {
1209 /* Skip object */
1210 for (i = 0; i < size; i++) {
1211 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1212 &val,
1213 &offset);
1214 data_pos += offset;
1215 }
1216 continue;
1217 }
1218
1219 if (size > mxt_obj_size(object)) {
1220 /*
1221 * Either we are in fallback mode due to wrong
1222 * config or config from a later fw version,
1223 * or the file is corrupt or hand-edited.
1224 */
1225 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1226 size - mxt_obj_size(object), type);
1227 } else if (mxt_obj_size(object) > size) {
1228 /*
1229 * If firmware is upgraded, new bytes may be added to
1230 * end of objects. It is generally forward compatible
1231 * to zero these bytes - previous behaviour will be
1232 * retained. However this does invalidate the CRC and
1233 * will force fallback mode until the configuration is
1234 * updated. We warn here but do nothing else - the
1235 * malloc has zeroed the entire configuration.
1236 */
1237 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1238 mxt_obj_size(object) - size, type);
1239 }
1240
1241 if (instance >= mxt_obj_instances(object)) {
1242 dev_err(dev, "Object instances exceeded!\n");
1243 ret = -EINVAL;
1244 goto release_mem;
1245 }
1246
1247 reg = object->start_address + mxt_obj_size(object) * instance;
1248
1249 for (i = 0; i < size; i++) {
1250 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1251 &val,
1252 &offset);
1253 if (ret != 1) {
1254 dev_err(dev, "Bad format in T%d\n", type);
1255 ret = -EINVAL;
1256 goto release_mem;
1257 }
1258 data_pos += offset;
1259
1260 if (i > mxt_obj_size(object))
1261 continue;
1262
1263 byte_offset = reg + i - cfg_start_ofs;
1264
1265 if ((byte_offset >= 0)
1266 && (byte_offset <= config_mem_size)) {
1267 *(config_mem + byte_offset) = val;
1268 } else {
1269 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1270 reg, object->type, byte_offset);
1271 ret = -EINVAL;
1272 goto release_mem;
1273 }
1274 }
1275 }
1276
1277 /* Calculate crc of the received configs (not the raw config file) */
1278 if (data->T7_address < cfg_start_ofs) {
1279 dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
1280 data->T7_address, cfg_start_ofs);
1281 ret = 0;
1282 goto release_mem;
1283 }
1284
1285 calculated_crc = mxt_calculate_crc(config_mem,
1286 data->T7_address - cfg_start_ofs,
1287 config_mem_size);
1288
1289 if (config_crc > 0 && (config_crc != calculated_crc))
1290 dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
1291 calculated_crc, config_crc);
1292
1293 /* Write configuration as blocks */
1294 byte_offset = 0;
1295 while (byte_offset < config_mem_size) {
1296 size = config_mem_size - byte_offset;
1297
1298 if (size > MXT_MAX_BLOCK_WRITE)
1299 size = MXT_MAX_BLOCK_WRITE;
1300
1301 ret = __mxt_write_reg(data->client,
1302 cfg_start_ofs + byte_offset,
1303 size, config_mem + byte_offset);
1304 if (ret != 0) {
1305 dev_err(dev, "Config write error, ret=%d\n", ret);
1306 goto release_mem;
1307 }
1308
1309 byte_offset += size;
1310 }
1311
1312 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1313
1314 ret = mxt_soft_reset(data);
1315 if (ret)
1316 goto release_mem;
1317
1318 dev_info(dev, "Config successfully updated\n");
1319
1320 release_mem:
1321 kfree(config_mem);
1322 release:
1323 release_firmware(cfg);
1324 return ret;
1325 }
1326
1327 static int mxt_acquire_irq(struct mxt_data *data)
1328 {
1329 int error;
1330
1331 enable_irq(data->irq);
1332
1333 error = mxt_process_messages_until_invalid(data);
1334 if (error)
1335 return error;
1336
1337 return 0;
1338 }
1339
1340 static int mxt_get_info(struct mxt_data *data)
1341 {
1342 struct i2c_client *client = data->client;
1343 struct mxt_info *info = &data->info;
1344 int error;
1345
1346 /* Read 7-byte info block starting at address 0 */
1347 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
1348 if (error)
1349 return error;
1350
1351 return 0;
1352 }
1353
1354 static void mxt_free_object_table(struct mxt_data *data)
1355 {
1356 input_unregister_device(data->input_dev);
1357 data->input_dev = NULL;
1358
1359 kfree(data->object_table);
1360 data->object_table = NULL;
1361 kfree(data->msg_buf);
1362 data->msg_buf = NULL;
1363 data->T5_address = 0;
1364 data->T5_msg_size = 0;
1365 data->T6_reportid = 0;
1366 data->T7_address = 0;
1367 data->T9_reportid_min = 0;
1368 data->T9_reportid_max = 0;
1369 data->T19_reportid = 0;
1370 data->T44_address = 0;
1371 data->max_reportid = 0;
1372 }
1373
1374 static int mxt_get_object_table(struct mxt_data *data)
1375 {
1376 struct i2c_client *client = data->client;
1377 size_t table_size;
1378 struct mxt_object *object_table;
1379 int error;
1380 int i;
1381 u8 reportid;
1382 u16 end_address;
1383
1384 table_size = data->info.object_num * sizeof(struct mxt_object);
1385 object_table = kzalloc(table_size, GFP_KERNEL);
1386 if (!object_table) {
1387 dev_err(&data->client->dev, "Failed to allocate memory\n");
1388 return -ENOMEM;
1389 }
1390
1391 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
1392 object_table);
1393 if (error) {
1394 kfree(object_table);
1395 return error;
1396 }
1397
1398 /* Valid Report IDs start counting from 1 */
1399 reportid = 1;
1400 data->mem_size = 0;
1401 for (i = 0; i < data->info.object_num; i++) {
1402 struct mxt_object *object = object_table + i;
1403 u8 min_id, max_id;
1404
1405 le16_to_cpus(&object->start_address);
1406
1407 if (object->num_report_ids) {
1408 min_id = reportid;
1409 reportid += object->num_report_ids *
1410 mxt_obj_instances(object);
1411 max_id = reportid - 1;
1412 } else {
1413 min_id = 0;
1414 max_id = 0;
1415 }
1416
1417 dev_dbg(&data->client->dev,
1418 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1419 object->type, object->start_address,
1420 mxt_obj_size(object), mxt_obj_instances(object),
1421 min_id, max_id);
1422
1423 switch (object->type) {
1424 case MXT_GEN_MESSAGE_T5:
1425 if (data->info.family_id == 0x80 &&
1426 data->info.version < 0x20) {
1427 /*
1428 * On mXT224 firmware versions prior to V2.0
1429 * read and discard unused CRC byte otherwise
1430 * DMA reads are misaligned.
1431 */
1432 data->T5_msg_size = mxt_obj_size(object);
1433 } else {
1434 /* CRC not enabled, so skip last byte */
1435 data->T5_msg_size = mxt_obj_size(object) - 1;
1436 }
1437 data->T5_address = object->start_address;
1438 case MXT_GEN_COMMAND_T6:
1439 data->T6_reportid = min_id;
1440 data->T6_address = object->start_address;
1441 break;
1442 case MXT_GEN_POWER_T7:
1443 data->T7_address = object->start_address;
1444 break;
1445 case MXT_TOUCH_MULTI_T9:
1446 data->T9_reportid_min = min_id;
1447 data->T9_reportid_max = max_id;
1448 data->num_touchids = object->num_report_ids
1449 * mxt_obj_instances(object);
1450 break;
1451 case MXT_SPT_MESSAGECOUNT_T44:
1452 data->T44_address = object->start_address;
1453 break;
1454 case MXT_SPT_GPIOPWM_T19:
1455 data->T19_reportid = min_id;
1456 break;
1457 }
1458
1459 end_address = object->start_address
1460 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1461
1462 if (end_address >= data->mem_size)
1463 data->mem_size = end_address + 1;
1464 }
1465
1466 /* Store maximum reportid */
1467 data->max_reportid = reportid;
1468
1469 /* If T44 exists, T5 position has to be directly after */
1470 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1471 dev_err(&client->dev, "Invalid T44 position\n");
1472 error = -EINVAL;
1473 goto free_object_table;
1474 }
1475
1476 data->msg_buf = kcalloc(data->max_reportid,
1477 data->T5_msg_size, GFP_KERNEL);
1478 if (!data->msg_buf) {
1479 dev_err(&client->dev, "Failed to allocate message buffer\n");
1480 error = -ENOMEM;
1481 goto free_object_table;
1482 }
1483
1484 data->object_table = object_table;
1485
1486 return 0;
1487
1488 free_object_table:
1489 mxt_free_object_table(data);
1490 return error;
1491 }
1492
1493 static int mxt_read_t9_resolution(struct mxt_data *data)
1494 {
1495 struct i2c_client *client = data->client;
1496 int error;
1497 struct t9_range range;
1498 unsigned char orient;
1499 struct mxt_object *object;
1500
1501 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1502 if (!object)
1503 return -EINVAL;
1504
1505 error = __mxt_read_reg(client,
1506 object->start_address + MXT_T9_RANGE,
1507 sizeof(range), &range);
1508 if (error)
1509 return error;
1510
1511 le16_to_cpus(&range.x);
1512 le16_to_cpus(&range.y);
1513
1514 error = __mxt_read_reg(client,
1515 object->start_address + MXT_T9_ORIENT,
1516 1, &orient);
1517 if (error)
1518 return error;
1519
1520 /* Handle default values */
1521 if (range.x == 0)
1522 range.x = 1023;
1523
1524 if (range.y == 0)
1525 range.y = 1023;
1526
1527 if (orient & MXT_T9_ORIENT_SWITCH) {
1528 data->max_x = range.y;
1529 data->max_y = range.x;
1530 } else {
1531 data->max_x = range.x;
1532 data->max_y = range.y;
1533 }
1534
1535 dev_dbg(&client->dev,
1536 "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1537
1538 return 0;
1539 }
1540
1541 static int mxt_input_open(struct input_dev *dev);
1542 static void mxt_input_close(struct input_dev *dev);
1543
1544 static int mxt_initialize_t9_input_device(struct mxt_data *data)
1545 {
1546 struct device *dev = &data->client->dev;
1547 const struct mxt_platform_data *pdata = data->pdata;
1548 struct input_dev *input_dev;
1549 int error;
1550 unsigned int num_mt_slots;
1551 unsigned int mt_flags = 0;
1552 int i;
1553
1554 error = mxt_read_t9_resolution(data);
1555 if (error)
1556 dev_warn(dev, "Failed to initialize T9 resolution\n");
1557
1558 input_dev = input_allocate_device();
1559 if (!input_dev) {
1560 dev_err(dev, "Failed to allocate memory\n");
1561 return -ENOMEM;
1562 }
1563
1564 input_dev->name = "Atmel maXTouch Touchscreen";
1565 input_dev->phys = data->phys;
1566 input_dev->id.bustype = BUS_I2C;
1567 input_dev->dev.parent = dev;
1568 input_dev->open = mxt_input_open;
1569 input_dev->close = mxt_input_close;
1570
1571 __set_bit(EV_ABS, input_dev->evbit);
1572 __set_bit(EV_KEY, input_dev->evbit);
1573 __set_bit(BTN_TOUCH, input_dev->keybit);
1574
1575 if (pdata->t19_num_keys) {
1576 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1577
1578 for (i = 0; i < pdata->t19_num_keys; i++)
1579 if (pdata->t19_keymap[i] != KEY_RESERVED)
1580 input_set_capability(input_dev, EV_KEY,
1581 pdata->t19_keymap[i]);
1582
1583 mt_flags |= INPUT_MT_POINTER;
1584
1585 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1586 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1587 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1588 MXT_PIXELS_PER_MM);
1589 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1590 MXT_PIXELS_PER_MM);
1591
1592 input_dev->name = "Atmel maXTouch Touchpad";
1593 }
1594
1595 /* For single touch */
1596 input_set_abs_params(input_dev, ABS_X,
1597 0, data->max_x, 0, 0);
1598 input_set_abs_params(input_dev, ABS_Y,
1599 0, data->max_y, 0, 0);
1600 input_set_abs_params(input_dev, ABS_PRESSURE,
1601 0, 255, 0, 0);
1602
1603 /* For multi touch */
1604 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1605 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1606 if (error) {
1607 dev_err(dev, "Error %d initialising slots\n", error);
1608 goto err_free_mem;
1609 }
1610
1611 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1612 0, MXT_MAX_AREA, 0, 0);
1613 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1614 0, data->max_x, 0, 0);
1615 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1616 0, data->max_y, 0, 0);
1617 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1618 0, 255, 0, 0);
1619
1620 input_set_drvdata(input_dev, data);
1621
1622 error = input_register_device(input_dev);
1623 if (error) {
1624 dev_err(dev, "Error %d registering input device\n", error);
1625 goto err_free_mem;
1626 }
1627
1628 data->input_dev = input_dev;
1629
1630 return 0;
1631
1632 err_free_mem:
1633 input_free_device(input_dev);
1634 return error;
1635 }
1636
1637 static int mxt_configure_objects(struct mxt_data *data,
1638 const struct firmware *cfg);
1639
1640 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
1641 {
1642 mxt_configure_objects(ctx, cfg);
1643 }
1644
1645 static int mxt_initialize(struct mxt_data *data)
1646 {
1647 struct i2c_client *client = data->client;
1648 int recovery_attempts = 0;
1649 int error;
1650
1651 while (1) {
1652 error = mxt_get_info(data);
1653 if (!error)
1654 break;
1655
1656 /* Check bootloader state */
1657 error = mxt_probe_bootloader(data, false);
1658 if (error) {
1659 dev_info(&client->dev, "Trying alternate bootloader address\n");
1660 error = mxt_probe_bootloader(data, true);
1661 if (error) {
1662 /* Chip is not in appmode or bootloader mode */
1663 return error;
1664 }
1665 }
1666
1667 /* OK, we are in bootloader, see if we can recover */
1668 if (++recovery_attempts > 1) {
1669 dev_err(&client->dev, "Could not recover from bootloader mode\n");
1670 /*
1671 * We can reflash from this state, so do not
1672 * abort initialization.
1673 */
1674 data->in_bootloader = true;
1675 return 0;
1676 }
1677
1678 /* Attempt to exit bootloader into app mode */
1679 mxt_send_bootloader_cmd(data, false);
1680 msleep(MXT_FW_RESET_TIME);
1681 }
1682
1683 /* Get object table information */
1684 error = mxt_get_object_table(data);
1685 if (error) {
1686 dev_err(&client->dev, "Error %d reading object table\n", error);
1687 return error;
1688 }
1689
1690 mxt_acquire_irq(data);
1691 if (error)
1692 goto err_free_object_table;
1693
1694 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
1695 &client->dev, GFP_KERNEL, data,
1696 mxt_config_cb);
1697 if (error) {
1698 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
1699 error);
1700 goto err_free_object_table;
1701 }
1702
1703 return 0;
1704
1705 err_free_object_table:
1706 mxt_free_object_table(data);
1707 return error;
1708 }
1709
1710 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
1711 {
1712 struct device *dev = &data->client->dev;
1713 int error;
1714 struct t7_config *new_config;
1715 struct t7_config deepsleep = { .active = 0, .idle = 0 };
1716
1717 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
1718 new_config = &deepsleep;
1719 else
1720 new_config = &data->t7_cfg;
1721
1722 error = __mxt_write_reg(data->client, data->T7_address,
1723 sizeof(data->t7_cfg), new_config);
1724 if (error)
1725 return error;
1726
1727 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
1728 new_config->active, new_config->idle);
1729
1730 return 0;
1731 }
1732
1733 static int mxt_init_t7_power_cfg(struct mxt_data *data)
1734 {
1735 struct device *dev = &data->client->dev;
1736 int error;
1737 bool retry = false;
1738
1739 recheck:
1740 error = __mxt_read_reg(data->client, data->T7_address,
1741 sizeof(data->t7_cfg), &data->t7_cfg);
1742 if (error)
1743 return error;
1744
1745 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
1746 if (!retry) {
1747 dev_dbg(dev, "T7 cfg zero, resetting\n");
1748 mxt_soft_reset(data);
1749 retry = true;
1750 goto recheck;
1751 } else {
1752 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
1753 data->t7_cfg.active = 20;
1754 data->t7_cfg.idle = 100;
1755 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
1756 }
1757 }
1758
1759 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
1760 data->t7_cfg.active, data->t7_cfg.idle);
1761 return 0;
1762 }
1763
1764 static int mxt_configure_objects(struct mxt_data *data,
1765 const struct firmware *cfg)
1766 {
1767 struct device *dev = &data->client->dev;
1768 struct mxt_info *info = &data->info;
1769 int error;
1770
1771 if (cfg) {
1772 error = mxt_update_cfg(data, cfg);
1773 if (error)
1774 dev_warn(dev, "Error %d updating config\n", error);
1775 }
1776
1777 error = mxt_init_t7_power_cfg(data);
1778 if (error) {
1779 dev_err(dev, "Failed to initialize power cfg\n");
1780 return error;
1781 }
1782
1783 error = mxt_initialize_t9_input_device(data);
1784 if (error)
1785 return error;
1786
1787 dev_info(dev,
1788 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
1789 info->family_id, info->variant_id, info->version >> 4,
1790 info->version & 0xf, info->build, info->object_num);
1791
1792 return 0;
1793 }
1794
1795 /* Firmware Version is returned as Major.Minor.Build */
1796 static ssize_t mxt_fw_version_show(struct device *dev,
1797 struct device_attribute *attr, char *buf)
1798 {
1799 struct mxt_data *data = dev_get_drvdata(dev);
1800 struct mxt_info *info = &data->info;
1801 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
1802 info->version >> 4, info->version & 0xf, info->build);
1803 }
1804
1805 /* Hardware Version is returned as FamilyID.VariantID */
1806 static ssize_t mxt_hw_version_show(struct device *dev,
1807 struct device_attribute *attr, char *buf)
1808 {
1809 struct mxt_data *data = dev_get_drvdata(dev);
1810 struct mxt_info *info = &data->info;
1811 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
1812 info->family_id, info->variant_id);
1813 }
1814
1815 static ssize_t mxt_show_instance(char *buf, int count,
1816 struct mxt_object *object, int instance,
1817 const u8 *val)
1818 {
1819 int i;
1820
1821 if (mxt_obj_instances(object) > 1)
1822 count += scnprintf(buf + count, PAGE_SIZE - count,
1823 "Instance %u\n", instance);
1824
1825 for (i = 0; i < mxt_obj_size(object); i++)
1826 count += scnprintf(buf + count, PAGE_SIZE - count,
1827 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
1828 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
1829
1830 return count;
1831 }
1832
1833 static ssize_t mxt_object_show(struct device *dev,
1834 struct device_attribute *attr, char *buf)
1835 {
1836 struct mxt_data *data = dev_get_drvdata(dev);
1837 struct mxt_object *object;
1838 int count = 0;
1839 int i, j;
1840 int error;
1841 u8 *obuf;
1842
1843 /* Pre-allocate buffer large enough to hold max sized object. */
1844 obuf = kmalloc(256, GFP_KERNEL);
1845 if (!obuf)
1846 return -ENOMEM;
1847
1848 error = 0;
1849 for (i = 0; i < data->info.object_num; i++) {
1850 object = data->object_table + i;
1851
1852 if (!mxt_object_readable(object->type))
1853 continue;
1854
1855 count += scnprintf(buf + count, PAGE_SIZE - count,
1856 "T%u:\n", object->type);
1857
1858 for (j = 0; j < mxt_obj_instances(object); j++) {
1859 u16 size = mxt_obj_size(object);
1860 u16 addr = object->start_address + j * size;
1861
1862 error = __mxt_read_reg(data->client, addr, size, obuf);
1863 if (error)
1864 goto done;
1865
1866 count = mxt_show_instance(buf, count, object, j, obuf);
1867 }
1868 }
1869
1870 done:
1871 kfree(obuf);
1872 return error ?: count;
1873 }
1874
1875 static int mxt_check_firmware_format(struct device *dev,
1876 const struct firmware *fw)
1877 {
1878 unsigned int pos = 0;
1879 char c;
1880
1881 while (pos < fw->size) {
1882 c = *(fw->data + pos);
1883
1884 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
1885 return 0;
1886
1887 pos++;
1888 }
1889
1890 /*
1891 * To convert file try:
1892 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
1893 */
1894 dev_err(dev, "Aborting: firmware file must be in binary format\n");
1895
1896 return -EINVAL;
1897 }
1898
1899 static int mxt_load_fw(struct device *dev, const char *fn)
1900 {
1901 struct mxt_data *data = dev_get_drvdata(dev);
1902 const struct firmware *fw = NULL;
1903 unsigned int frame_size;
1904 unsigned int pos = 0;
1905 unsigned int retry = 0;
1906 unsigned int frame = 0;
1907 int ret;
1908
1909 ret = request_firmware(&fw, fn, dev);
1910 if (ret) {
1911 dev_err(dev, "Unable to open firmware %s\n", fn);
1912 return ret;
1913 }
1914
1915 /* Check for incorrect enc file */
1916 ret = mxt_check_firmware_format(dev, fw);
1917 if (ret)
1918 goto release_firmware;
1919
1920 if (!data->in_bootloader) {
1921 /* Change to the bootloader mode */
1922 data->in_bootloader = true;
1923
1924 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
1925 MXT_BOOT_VALUE, false);
1926 if (ret)
1927 goto release_firmware;
1928
1929 msleep(MXT_RESET_TIME);
1930
1931 /* Do not need to scan since we know family ID */
1932 ret = mxt_lookup_bootloader_address(data, 0);
1933 if (ret)
1934 goto release_firmware;
1935 } else {
1936 enable_irq(data->irq);
1937 }
1938
1939 mxt_free_object_table(data);
1940 reinit_completion(&data->bl_completion);
1941
1942 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
1943 if (ret) {
1944 /* Bootloader may still be unlocked from previous attempt */
1945 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
1946 if (ret)
1947 goto disable_irq;
1948 } else {
1949 dev_info(dev, "Unlocking bootloader\n");
1950
1951 /* Unlock bootloader */
1952 ret = mxt_send_bootloader_cmd(data, true);
1953 if (ret)
1954 goto disable_irq;
1955 }
1956
1957 while (pos < fw->size) {
1958 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
1959 if (ret)
1960 goto disable_irq;
1961
1962 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
1963
1964 /* Take account of CRC bytes */
1965 frame_size += 2;
1966
1967 /* Write one frame to device */
1968 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
1969 if (ret)
1970 goto disable_irq;
1971
1972 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
1973 if (ret) {
1974 retry++;
1975
1976 /* Back off by 20ms per retry */
1977 msleep(retry * 20);
1978
1979 if (retry > 20) {
1980 dev_err(dev, "Retry count exceeded\n");
1981 goto disable_irq;
1982 }
1983 } else {
1984 retry = 0;
1985 pos += frame_size;
1986 frame++;
1987 }
1988
1989 if (frame % 50 == 0)
1990 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
1991 frame, pos, fw->size);
1992 }
1993
1994 /* Wait for flash. */
1995 ret = mxt_wait_for_completion(data, &data->bl_completion,
1996 MXT_FW_RESET_TIME);
1997 if (ret)
1998 goto disable_irq;
1999
2000 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2001
2002 /*
2003 * Wait for device to reset. Some bootloader versions do not assert
2004 * the CHG line after bootloading has finished, so ignore potential
2005 * errors.
2006 */
2007 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
2008
2009 data->in_bootloader = false;
2010
2011 disable_irq:
2012 disable_irq(data->irq);
2013 release_firmware:
2014 release_firmware(fw);
2015 return ret;
2016 }
2017
2018 static ssize_t mxt_update_fw_store(struct device *dev,
2019 struct device_attribute *attr,
2020 const char *buf, size_t count)
2021 {
2022 struct mxt_data *data = dev_get_drvdata(dev);
2023 int error;
2024
2025 error = mxt_load_fw(dev, MXT_FW_NAME);
2026 if (error) {
2027 dev_err(dev, "The firmware update failed(%d)\n", error);
2028 count = error;
2029 } else {
2030 dev_info(dev, "The firmware update succeeded\n");
2031
2032 error = mxt_initialize(data);
2033 if (error)
2034 return error;
2035 }
2036
2037 return count;
2038 }
2039
2040 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2041 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
2042 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2043 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
2044
2045 static struct attribute *mxt_attrs[] = {
2046 &dev_attr_fw_version.attr,
2047 &dev_attr_hw_version.attr,
2048 &dev_attr_object.attr,
2049 &dev_attr_update_fw.attr,
2050 NULL
2051 };
2052
2053 static const struct attribute_group mxt_attr_group = {
2054 .attrs = mxt_attrs,
2055 };
2056
2057 static void mxt_start(struct mxt_data *data)
2058 {
2059 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2060
2061 /* Recalibrate since chip has been in deep sleep */
2062 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
2063 }
2064
2065 static void mxt_stop(struct mxt_data *data)
2066 {
2067 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
2068 }
2069
2070 static int mxt_input_open(struct input_dev *dev)
2071 {
2072 struct mxt_data *data = input_get_drvdata(dev);
2073
2074 mxt_start(data);
2075
2076 return 0;
2077 }
2078
2079 static void mxt_input_close(struct input_dev *dev)
2080 {
2081 struct mxt_data *data = input_get_drvdata(dev);
2082
2083 mxt_stop(data);
2084 }
2085
2086 #ifdef CONFIG_OF
2087 static struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2088 {
2089 struct mxt_platform_data *pdata;
2090 u32 *keymap;
2091 u32 keycode;
2092 int proplen, i, ret;
2093
2094 if (!client->dev.of_node)
2095 return ERR_PTR(-ENODEV);
2096
2097 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
2098 if (!pdata)
2099 return ERR_PTR(-ENOMEM);
2100
2101 if (of_find_property(client->dev.of_node, "linux,gpio-keymap",
2102 &proplen)) {
2103 pdata->t19_num_keys = proplen / sizeof(u32);
2104
2105 keymap = devm_kzalloc(&client->dev,
2106 pdata->t19_num_keys * sizeof(keymap[0]),
2107 GFP_KERNEL);
2108 if (!keymap)
2109 return ERR_PTR(-ENOMEM);
2110
2111 for (i = 0; i < pdata->t19_num_keys; i++) {
2112 ret = of_property_read_u32_index(client->dev.of_node,
2113 "linux,gpio-keymap", i, &keycode);
2114 if (ret)
2115 keycode = KEY_RESERVED;
2116
2117 keymap[i] = keycode;
2118 }
2119
2120 pdata->t19_keymap = keymap;
2121 }
2122
2123 return pdata;
2124 }
2125 #else
2126 static struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2127 {
2128 dev_dbg(&client->dev, "No platform data specified\n");
2129 return ERR_PTR(-EINVAL);
2130 }
2131 #endif
2132
2133 static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
2134 {
2135 struct mxt_data *data;
2136 const struct mxt_platform_data *pdata;
2137 int error;
2138
2139 pdata = dev_get_platdata(&client->dev);
2140 if (!pdata) {
2141 pdata = mxt_parse_dt(client);
2142 if (IS_ERR(pdata))
2143 return PTR_ERR(pdata);
2144 }
2145
2146 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
2147 if (!data) {
2148 dev_err(&client->dev, "Failed to allocate memory\n");
2149 return -ENOMEM;
2150 }
2151
2152 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
2153 client->adapter->nr, client->addr);
2154
2155 data->client = client;
2156 data->pdata = pdata;
2157 data->irq = client->irq;
2158 i2c_set_clientdata(client, data);
2159
2160 init_completion(&data->bl_completion);
2161 init_completion(&data->reset_completion);
2162 init_completion(&data->crc_completion);
2163
2164 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
2165 pdata->irqflags | IRQF_ONESHOT,
2166 client->name, data);
2167 if (error) {
2168 dev_err(&client->dev, "Failed to register interrupt\n");
2169 goto err_free_mem;
2170 }
2171
2172 disable_irq(client->irq);
2173
2174 error = mxt_initialize(data);
2175 if (error)
2176 goto err_free_irq;
2177
2178 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
2179 if (error) {
2180 dev_err(&client->dev, "Failure %d creating sysfs group\n",
2181 error);
2182 goto err_free_object;
2183 }
2184
2185 return 0;
2186
2187 err_free_object:
2188 mxt_free_object_table(data);
2189 err_free_irq:
2190 free_irq(client->irq, data);
2191 err_free_mem:
2192 kfree(data);
2193 return error;
2194 }
2195
2196 static int mxt_remove(struct i2c_client *client)
2197 {
2198 struct mxt_data *data = i2c_get_clientdata(client);
2199
2200 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
2201 free_irq(data->irq, data);
2202 input_unregister_device(data->input_dev);
2203 mxt_free_object_table(data);
2204 kfree(data);
2205
2206 return 0;
2207 }
2208
2209 #ifdef CONFIG_PM_SLEEP
2210 static int mxt_suspend(struct device *dev)
2211 {
2212 struct i2c_client *client = to_i2c_client(dev);
2213 struct mxt_data *data = i2c_get_clientdata(client);
2214 struct input_dev *input_dev = data->input_dev;
2215
2216 mutex_lock(&input_dev->mutex);
2217
2218 if (input_dev->users)
2219 mxt_stop(data);
2220
2221 mutex_unlock(&input_dev->mutex);
2222
2223 return 0;
2224 }
2225
2226 static int mxt_resume(struct device *dev)
2227 {
2228 struct i2c_client *client = to_i2c_client(dev);
2229 struct mxt_data *data = i2c_get_clientdata(client);
2230 struct input_dev *input_dev = data->input_dev;
2231
2232 mutex_lock(&input_dev->mutex);
2233
2234 if (input_dev->users)
2235 mxt_start(data);
2236
2237 mutex_unlock(&input_dev->mutex);
2238
2239 return 0;
2240 }
2241 #endif
2242
2243 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
2244
2245 static const struct of_device_id mxt_of_match[] = {
2246 { .compatible = "atmel,maxtouch", },
2247 {},
2248 };
2249 MODULE_DEVICE_TABLE(of, mxt_of_match);
2250
2251 static const struct i2c_device_id mxt_id[] = {
2252 { "qt602240_ts", 0 },
2253 { "atmel_mxt_ts", 0 },
2254 { "atmel_mxt_tp", 0 },
2255 { "mXT224", 0 },
2256 { }
2257 };
2258 MODULE_DEVICE_TABLE(i2c, mxt_id);
2259
2260 static struct i2c_driver mxt_driver = {
2261 .driver = {
2262 .name = "atmel_mxt_ts",
2263 .owner = THIS_MODULE,
2264 .of_match_table = of_match_ptr(mxt_of_match),
2265 .pm = &mxt_pm_ops,
2266 },
2267 .probe = mxt_probe,
2268 .remove = mxt_remove,
2269 .id_table = mxt_id,
2270 };
2271
2272 module_i2c_driver(mxt_driver);
2273
2274 /* Module information */
2275 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
2276 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
2277 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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