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[mirror_ubuntu-zesty-kernel.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/acpi.h>
18 #include <linux/dmi.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/completion.h>
22 #include <linux/delay.h>
23 #include <linux/firmware.h>
24 #include <linux/i2c.h>
25 #include <linux/platform_data/atmel_mxt_ts.h>
26 #include <linux/input/mt.h>
27 #include <linux/interrupt.h>
28 #include <linux/of.h>
29 #include <linux/slab.h>
30 #include <asm/unaligned.h>
31
32 /* Firmware files */
33 #define MXT_FW_NAME "maxtouch.fw"
34 #define MXT_CFG_NAME "maxtouch.cfg"
35 #define MXT_CFG_MAGIC "OBP_RAW V1"
36
37 /* Registers */
38 #define MXT_OBJECT_START 0x07
39 #define MXT_OBJECT_SIZE 6
40 #define MXT_INFO_CHECKSUM_SIZE 3
41 #define MXT_MAX_BLOCK_WRITE 256
42
43 /* Object types */
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
71 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
72
73 /* MXT_GEN_MESSAGE_T5 object */
74 #define MXT_RPTID_NOMSG 0xff
75
76 /* MXT_GEN_COMMAND_T6 field */
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
83 /* Define for T6 status byte */
84 #define MXT_T6_STATUS_RESET (1 << 7)
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)
90
91 /* MXT_GEN_POWER_T7 field */
92 struct 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
99
100 /* MXT_TOUCH_MULTI_T9 field */
101 #define MXT_T9_CTRL 0
102 #define MXT_T9_ORIENT 9
103 #define MXT_T9_RANGE 18
104
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
115 struct t9_range {
116 u16 x;
117 u16 y;
118 } __packed;
119
120 /* MXT_TOUCH_MULTI_T9 orient */
121 #define MXT_T9_ORIENT_SWITCH (1 << 0)
122
123 /* MXT_SPT_COMMSCONFIG_T18 */
124 #define MXT_COMMS_CTRL 0
125 #define MXT_COMMS_CMD 1
126
127 /* Define for MXT_GEN_COMMAND_T6 */
128 #define MXT_BOOT_VALUE 0xa5
129 #define MXT_RESET_VALUE 0x01
130 #define MXT_BACKUP_VALUE 0x55
131
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
148 enum 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
162 /* Delay times */
163 #define MXT_BACKUP_TIME 50 /* msec */
164 #define MXT_RESET_TIME 200 /* msec */
165 #define MXT_RESET_TIMEOUT 3000 /* msec */
166 #define MXT_CRC_TIMEOUT 1000 /* msec */
167 #define MXT_FW_RESET_TIME 3000 /* msec */
168 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
169
170 /* Command to unlock bootloader */
171 #define MXT_UNLOCK_CMD_MSB 0xaa
172 #define MXT_UNLOCK_CMD_LSB 0xdc
173
174 /* Bootloader mode status */
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
182 #define MXT_BOOT_EXTENDED_ID (1 << 5)
183 #define MXT_BOOT_ID_MASK 0x1f
184
185 /* Touchscreen absolute values */
186 #define MXT_MAX_AREA 0xff
187
188 #define MXT_PIXELS_PER_MM 20
189
190 struct mxt_info {
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
200 struct mxt_object {
201 u8 type;
202 u16 start_address;
203 u8 size_minus_one;
204 u8 instances_minus_one;
205 u8 num_report_ids;
206 } __packed;
207
208 /* Each client has this additional data */
209 struct mxt_data {
210 struct i2c_client *client;
211 struct input_dev *input_dev;
212 char phys[64]; /* device physical location */
213 const struct mxt_platform_data *pdata;
214 struct mxt_object *object_table;
215 struct mxt_info info;
216 unsigned int irq;
217 unsigned int max_x;
218 unsigned int max_y;
219 bool in_bootloader;
220 u16 mem_size;
221 u8 t100_aux_ampl;
222 u8 t100_aux_area;
223 u8 t100_aux_vect;
224 u8 max_reportid;
225 u32 config_crc;
226 u32 info_crc;
227 u8 bootloader_addr;
228 u8 *msg_buf;
229 u8 t6_status;
230 bool update_input;
231 u8 last_message_count;
232 u8 num_touchids;
233 u8 multitouch;
234 struct t7_config t7_cfg;
235
236 /* Cached parameters from object table */
237 u16 T5_address;
238 u8 T5_msg_size;
239 u8 T6_reportid;
240 u16 T6_address;
241 u16 T7_address;
242 u8 T9_reportid_min;
243 u8 T9_reportid_max;
244 u8 T19_reportid;
245 u16 T44_address;
246 u8 T100_reportid_min;
247 u8 T100_reportid_max;
248
249 /* for fw update in bootloader */
250 struct completion bl_completion;
251
252 /* for reset handling */
253 struct completion reset_completion;
254
255 /* for config update handling */
256 struct completion crc_completion;
257 };
258
259 static size_t mxt_obj_size(const struct mxt_object *obj)
260 {
261 return obj->size_minus_one + 1;
262 }
263
264 static size_t mxt_obj_instances(const struct mxt_object *obj)
265 {
266 return obj->instances_minus_one + 1;
267 }
268
269 static bool mxt_object_readable(unsigned int type)
270 {
271 switch (type) {
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:
296 return true;
297 default:
298 return false;
299 }
300 }
301
302 static void mxt_dump_message(struct mxt_data *data, u8 *message)
303 {
304 dev_dbg(&data->client->dev, "message: %*ph\n",
305 data->T5_msg_size, message);
306 }
307
308 static int mxt_wait_for_completion(struct mxt_data *data,
309 struct completion *comp,
310 unsigned int timeout_ms)
311 {
312 struct device *dev = &data->client->dev;
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
326 static 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);
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
350 static 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
373 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
374 {
375 u8 appmode = data->client->addr;
376 u8 bootloader;
377
378 switch (appmode) {
379 case 0x4a:
380 case 0x4b:
381 /* Chips after 1664S use different scheme */
382 if (retry || data->info.family_id >= 0xa2) {
383 bootloader = appmode - 0x24;
384 break;
385 }
386 /* Fall through for normal case */
387 case 0x4c:
388 case 0x4d:
389 case 0x5a:
390 case 0x5b:
391 bootloader = appmode - 0x26;
392 break;
393
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
405 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
406 {
407 struct device *dev = &data->client->dev;
408 int error;
409 u8 val;
410 bool crc_failure;
411
412 error = mxt_lookup_bootloader_address(data, alt_address);
413 if (error)
414 return error;
415
416 error = mxt_bootloader_read(data, &val, 1);
417 if (error)
418 return error;
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
429 static 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__);
437 return val;
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
450 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
451 bool wait)
452 {
453 struct device *dev = &data->client->dev;
454 u8 val;
455 int ret;
456
457 recheck:
458 if (wait) {
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 */
465 ret = mxt_wait_for_completion(data, &data->bl_completion,
466 MXT_FW_CHG_TIMEOUT);
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 */
474 dev_err(dev, "Update wait error %d\n", ret);
475 return ret;
476 }
477 }
478
479 ret = mxt_bootloader_read(data, &val, 1);
480 if (ret)
481 return ret;
482
483 if (state == MXT_WAITING_BOOTLOAD_CMD)
484 val = mxt_get_bootloader_version(data, val);
485
486 switch (state) {
487 case MXT_WAITING_BOOTLOAD_CMD:
488 case MXT_WAITING_FRAME_DATA:
489 case MXT_APP_CRC_FAIL:
490 val &= ~MXT_BOOT_STATUS_MASK;
491 break;
492 case MXT_FRAME_CRC_PASS:
493 if (val == MXT_FRAME_CRC_CHECK) {
494 goto recheck;
495 } else if (val == MXT_FRAME_CRC_FAIL) {
496 dev_err(dev, "Bootloader CRC fail\n");
497 return -EINVAL;
498 }
499 break;
500 default:
501 return -EINVAL;
502 }
503
504 if (val != state) {
505 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
506 val, state);
507 return -EINVAL;
508 }
509
510 return 0;
511 }
512
513 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
514 {
515 int ret;
516 u8 buf[2];
517
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 }
525
526 ret = mxt_bootloader_write(data, buf, 2);
527 if (ret)
528 return ret;
529
530 return 0;
531 }
532
533 static int __mxt_read_reg(struct i2c_client *client,
534 u16 reg, u16 len, void *val)
535 {
536 struct i2c_msg xfer[2];
537 u8 buf[2];
538 int ret;
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
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);
563 }
564
565 return ret;
566 }
567
568 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
569 const void *val)
570 {
571 u8 *buf;
572 size_t count;
573 int ret;
574
575 count = len + 2;
576 buf = kmalloc(count, GFP_KERNEL);
577 if (!buf)
578 return -ENOMEM;
579
580 buf[0] = reg & 0xff;
581 buf[1] = (reg >> 8) & 0xff;
582 memcpy(&buf[2], val, len);
583
584 ret = i2c_master_send(client, buf, count);
585 if (ret == count) {
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);
592 }
593
594 kfree(buf);
595 return ret;
596 }
597
598 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
599 {
600 return __mxt_write_reg(client, reg, 1, &val);
601 }
602
603 static struct mxt_object *
604 mxt_get_object(struct mxt_data *data, u8 type)
605 {
606 struct mxt_object *object;
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
615 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
616 return NULL;
617 }
618
619 static 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
652 static 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
666 static void mxt_input_button(struct mxt_data *data, u8 *message)
667 {
668 struct input_dev *input = data->input_dev;
669 const struct mxt_platform_data *pdata = data->pdata;
670 int i;
671
672 for (i = 0; i < pdata->t19_num_keys; i++) {
673 if (pdata->t19_keymap[i] == KEY_RESERVED)
674 continue;
675
676 /* Active-low switch */
677 input_report_key(input, pdata->t19_keymap[i],
678 !(message[1] & BIT(i)));
679 }
680 }
681
682 static void mxt_input_sync(struct mxt_data *data)
683 {
684 input_mt_report_pointer_emulation(data->input_dev,
685 data->pdata->t19_num_keys);
686 input_sync(data->input_dev);
687 }
688
689 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
690 {
691 struct device *dev = &data->client->dev;
692 struct input_dev *input_dev = data->input_dev;
693 int id;
694 u8 status;
695 int x;
696 int y;
697 int area;
698 int amplitude;
699
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));
704
705 /* Handle 10/12 bit switching */
706 if (data->max_x < 1024)
707 x >>= 2;
708 if (data->max_y < 1024)
709 y >>= 2;
710
711 area = message[5];
712 amplitude = message[6];
713
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,
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' : '.',
725 x, y, area, amplitude);
726
727 input_mt_slot(input_dev, id);
728
729 if (status & MXT_T9_DETECT) {
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);
738 mxt_input_sync(data);
739 }
740
741 /* Touch active */
742 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
743 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
744 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
745 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
746 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
747 } else {
748 /* Touch no longer active, close out slot */
749 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
750 }
751
752 data->update_input = true;
753 }
754
755 static 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
863 static int mxt_proc_message(struct mxt_data *data, u8 *message)
864 {
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);
878 } else if (report_id >= data->T9_reportid_min &&
879 report_id <= data->T9_reportid_max) {
880 mxt_proc_t9_message(data, message);
881 } else if (report_id >= data->T100_reportid_min &&
882 report_id <= data->T100_reportid_max) {
883 mxt_proc_t100_message(data, message);
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;
892 }
893
894 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
895 {
896 struct device *dev = &data->client->dev;
897 int ret;
898 int i;
899 u8 num_valid = 0;
900
901 /* Safety check for msg_buf */
902 if (count > data->max_reportid)
903 return -EINVAL;
904
905 /* Process remaining messages if necessary */
906 ret = __mxt_read_reg(data->client, data->T5_address,
907 data->T5_msg_size * count, data->msg_buf);
908 if (ret) {
909 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
910 return ret;
911 }
912
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;
923 }
924
925 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
926 {
927 struct device *dev = &data->client->dev;
928 int ret;
929 u8 count, num_left;
930
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 /*
942 * This condition may be caused by the CHG line being configured in
943 * Mode 0. It results in unnecessary I2C operations but it is benign.
944 */
945 if (count == 0)
946 return IRQ_NONE;
947
948 if (count > data->max_reportid) {
949 dev_warn(dev, "T44 count %d exceeded max report id\n", count);
950 count = data->max_reportid;
951 }
952
953 /* Process first message */
954 ret = mxt_proc_message(data, data->msg_buf + 1);
955 if (ret < 0) {
956 dev_warn(dev, "Unexpected invalid message\n");
957 return IRQ_NONE;
958 }
959
960 num_left = count - 1;
961
962 /* Process remaining messages if necessary */
963 if (num_left) {
964 ret = mxt_read_and_process_messages(data, num_left);
965 if (ret < 0)
966 goto end;
967 else if (ret != num_left)
968 dev_warn(dev, "Unexpected invalid message\n");
969 }
970
971 end:
972 if (data->update_input) {
973 mxt_input_sync(data);
974 data->update_input = false;
975 }
976
977 return IRQ_HANDLED;
978 }
979
980 static int mxt_process_messages_until_invalid(struct mxt_data *data)
981 {
982 struct device *dev = &data->client->dev;
983 int count, read;
984 u8 tries = 2;
985
986 count = data->max_reportid;
987
988 /* Read messages until we force an invalid */
989 do {
990 read = mxt_read_and_process_messages(data, count);
991 if (read < count)
992 return 0;
993 } while (--tries);
994
995 if (data->update_input) {
996 mxt_input_sync(data);
997 data->update_input = false;
998 }
999
1000 dev_err(dev, "CHG pin isn't cleared\n");
1001 return -EBUSY;
1002 }
1003
1004 static irqreturn_t mxt_process_messages(struct mxt_data *data)
1005 {
1006 int total_handled, num_handled;
1007 u8 count = data->last_message_count;
1008
1009 if (count < 1 || count > data->max_reportid)
1010 count = 1;
1011
1012 /* include final invalid message */
1013 total_handled = mxt_read_and_process_messages(data, count + 1);
1014 if (total_handled < 0)
1015 return IRQ_NONE;
1016 /* if there were invalid messages, then we are done */
1017 else if (total_handled <= count)
1018 goto update_count;
1019
1020 /* keep reading two msgs until one is invalid or reportid limit */
1021 do {
1022 num_handled = mxt_read_and_process_messages(data, 2);
1023 if (num_handled < 0)
1024 return IRQ_NONE;
1025
1026 total_handled += num_handled;
1027
1028 if (num_handled < 2)
1029 break;
1030 } while (total_handled < data->num_touchids);
1031
1032 update_count:
1033 data->last_message_count = total_handled;
1034
1035 if (data->update_input) {
1036 mxt_input_sync(data);
1037 data->update_input = false;
1038 }
1039
1040 return IRQ_HANDLED;
1041 }
1042
1043 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1044 {
1045 struct mxt_data *data = dev_id;
1046
1047 if (data->in_bootloader) {
1048 /* bootloader state transition completion */
1049 complete(&data->bl_completion);
1050 return IRQ_HANDLED;
1051 }
1052
1053 if (!data->object_table)
1054 return IRQ_HANDLED;
1055
1056 if (data->T44_address) {
1057 return mxt_process_messages_t44(data);
1058 } else {
1059 return mxt_process_messages(data);
1060 }
1061 }
1062
1063 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1064 u8 value, bool wait)
1065 {
1066 u16 reg;
1067 u8 command_register;
1068 int timeout_counter = 0;
1069 int ret;
1070
1071 reg = data->T6_address + cmd_offset;
1072
1073 ret = mxt_write_reg(data->client, reg, value);
1074 if (ret)
1075 return ret;
1076
1077 if (!wait)
1078 return 0;
1079
1080 do {
1081 msleep(20);
1082 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1083 if (ret)
1084 return ret;
1085 } while (command_register != 0 && timeout_counter++ <= 100);
1086
1087 if (timeout_counter > 100) {
1088 dev_err(&data->client->dev, "Command failed!\n");
1089 return -EIO;
1090 }
1091
1092 return 0;
1093 }
1094
1095 static int mxt_soft_reset(struct mxt_data *data)
1096 {
1097 struct device *dev = &data->client->dev;
1098 int ret = 0;
1099
1100 dev_info(dev, "Resetting device\n");
1101
1102 disable_irq(data->irq);
1103
1104 reinit_completion(&data->reset_completion);
1105
1106 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1107 if (ret)
1108 return ret;
1109
1110 /* Ignore CHG line for 100ms after reset */
1111 msleep(100);
1112
1113 enable_irq(data->irq);
1114
1115 ret = mxt_wait_for_completion(data, &data->reset_completion,
1116 MXT_RESET_TIMEOUT);
1117 if (ret)
1118 return ret;
1119
1120 return 0;
1121 }
1122
1123 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1124 {
1125 /*
1126 * On failure, CRC is set to 0 and config will always be
1127 * downloaded.
1128 */
1129 data->config_crc = 0;
1130 reinit_completion(&data->crc_completion);
1131
1132 mxt_t6_command(data, cmd, value, true);
1133
1134 /*
1135 * Wait for crc message. On failure, CRC is set to 0 and config will
1136 * always be downloaded.
1137 */
1138 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1139 }
1140
1141 static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1142 {
1143 static const unsigned int crcpoly = 0x80001B;
1144 u32 result;
1145 u32 data_word;
1146
1147 data_word = (secondbyte << 8) | firstbyte;
1148 result = ((*crc << 1) ^ data_word);
1149
1150 if (result & 0x1000000)
1151 result ^= crcpoly;
1152
1153 *crc = result;
1154 }
1155
1156 static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1157 {
1158 u32 crc = 0;
1159 u8 *ptr = base + start_off;
1160 u8 *last_val = base + end_off - 1;
1161
1162 if (end_off < start_off)
1163 return -EINVAL;
1164
1165 while (ptr < last_val) {
1166 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1167 ptr += 2;
1168 }
1169
1170 /* if len is odd, fill the last byte with 0 */
1171 if (ptr == last_val)
1172 mxt_calc_crc24(&crc, *ptr, 0);
1173
1174 /* Mask to 24-bit */
1175 crc &= 0x00FFFFFF;
1176
1177 return crc;
1178 }
1179
1180 static int mxt_prepare_cfg_mem(struct mxt_data *data,
1181 const struct firmware *cfg,
1182 unsigned int data_pos,
1183 unsigned int cfg_start_ofs,
1184 u8 *config_mem,
1185 size_t config_mem_size)
1186 {
1187 struct device *dev = &data->client->dev;
1188 struct mxt_object *object;
1189 unsigned int type, instance, size, byte_offset;
1190 int offset;
1191 int ret;
1192 int i;
1193 u16 reg;
1194 u8 val;
1195
1196 while (data_pos < cfg->size) {
1197 /* Read type, instance, length */
1198 ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
1199 &type, &instance, &size, &offset);
1200 if (ret == 0) {
1201 /* EOF */
1202 break;
1203 } else if (ret != 3) {
1204 dev_err(dev, "Bad format: failed to parse object\n");
1205 return -EINVAL;
1206 }
1207 data_pos += offset;
1208
1209 object = mxt_get_object(data, type);
1210 if (!object) {
1211 /* Skip object */
1212 for (i = 0; i < size; i++) {
1213 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1214 &val, &offset);
1215 if (ret != 1) {
1216 dev_err(dev, "Bad format in T%d at %d\n",
1217 type, i);
1218 return -EINVAL;
1219 }
1220 data_pos += offset;
1221 }
1222 continue;
1223 }
1224
1225 if (size > mxt_obj_size(object)) {
1226 /*
1227 * Either we are in fallback mode due to wrong
1228 * config or config from a later fw version,
1229 * or the file is corrupt or hand-edited.
1230 */
1231 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1232 size - mxt_obj_size(object), type);
1233 } else if (mxt_obj_size(object) > size) {
1234 /*
1235 * If firmware is upgraded, new bytes may be added to
1236 * end of objects. It is generally forward compatible
1237 * to zero these bytes - previous behaviour will be
1238 * retained. However this does invalidate the CRC and
1239 * will force fallback mode until the configuration is
1240 * updated. We warn here but do nothing else - the
1241 * malloc has zeroed the entire configuration.
1242 */
1243 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1244 mxt_obj_size(object) - size, type);
1245 }
1246
1247 if (instance >= mxt_obj_instances(object)) {
1248 dev_err(dev, "Object instances exceeded!\n");
1249 return -EINVAL;
1250 }
1251
1252 reg = object->start_address + mxt_obj_size(object) * instance;
1253
1254 for (i = 0; i < size; i++) {
1255 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1256 &val,
1257 &offset);
1258 if (ret != 1) {
1259 dev_err(dev, "Bad format in T%d at %d\n",
1260 type, i);
1261 return -EINVAL;
1262 }
1263 data_pos += offset;
1264
1265 if (i > mxt_obj_size(object))
1266 continue;
1267
1268 byte_offset = reg + i - cfg_start_ofs;
1269
1270 if (byte_offset >= 0 && byte_offset < config_mem_size) {
1271 *(config_mem + byte_offset) = val;
1272 } else {
1273 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1274 reg, object->type, byte_offset);
1275 return -EINVAL;
1276 }
1277 }
1278 }
1279
1280 return 0;
1281 }
1282
1283 static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
1284 u8 *config_mem, size_t config_mem_size)
1285 {
1286 unsigned int byte_offset = 0;
1287 int error;
1288
1289 /* Write configuration as blocks */
1290 while (byte_offset < config_mem_size) {
1291 unsigned int size = config_mem_size - byte_offset;
1292
1293 if (size > MXT_MAX_BLOCK_WRITE)
1294 size = MXT_MAX_BLOCK_WRITE;
1295
1296 error = __mxt_write_reg(data->client,
1297 cfg_start + byte_offset,
1298 size, config_mem + byte_offset);
1299 if (error) {
1300 dev_err(&data->client->dev,
1301 "Config write error, ret=%d\n", error);
1302 return error;
1303 }
1304
1305 byte_offset += size;
1306 }
1307
1308 return 0;
1309 }
1310
1311 static int mxt_init_t7_power_cfg(struct mxt_data *data);
1312
1313 /*
1314 * mxt_update_cfg - download configuration to chip
1315 *
1316 * Atmel Raw Config File Format
1317 *
1318 * The first four lines of the raw config file contain:
1319 * 1) Version
1320 * 2) Chip ID Information (first 7 bytes of device memory)
1321 * 3) Chip Information Block 24-bit CRC Checksum
1322 * 4) Chip Configuration 24-bit CRC Checksum
1323 *
1324 * The rest of the file consists of one line per object instance:
1325 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1326 *
1327 * <TYPE> - 2-byte object type as hex
1328 * <INSTANCE> - 2-byte object instance number as hex
1329 * <SIZE> - 2-byte object size as hex
1330 * <CONTENTS> - array of <SIZE> 1-byte hex values
1331 */
1332 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
1333 {
1334 struct device *dev = &data->client->dev;
1335 struct mxt_info cfg_info;
1336 int ret;
1337 int offset;
1338 int data_pos;
1339 int i;
1340 int cfg_start_ofs;
1341 u32 info_crc, config_crc, calculated_crc;
1342 u8 *config_mem;
1343 size_t config_mem_size;
1344
1345 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1346
1347 if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1348 dev_err(dev, "Unrecognised config file\n");
1349 return -EINVAL;
1350 }
1351
1352 data_pos = strlen(MXT_CFG_MAGIC);
1353
1354 /* Load information block and check */
1355 for (i = 0; i < sizeof(struct mxt_info); i++) {
1356 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1357 (unsigned char *)&cfg_info + i,
1358 &offset);
1359 if (ret != 1) {
1360 dev_err(dev, "Bad format\n");
1361 return -EINVAL;
1362 }
1363
1364 data_pos += offset;
1365 }
1366
1367 if (cfg_info.family_id != data->info.family_id) {
1368 dev_err(dev, "Family ID mismatch!\n");
1369 return -EINVAL;
1370 }
1371
1372 if (cfg_info.variant_id != data->info.variant_id) {
1373 dev_err(dev, "Variant ID mismatch!\n");
1374 return -EINVAL;
1375 }
1376
1377 /* Read CRCs */
1378 ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
1379 if (ret != 1) {
1380 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1381 return -EINVAL;
1382 }
1383 data_pos += offset;
1384
1385 ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
1386 if (ret != 1) {
1387 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1388 return -EINVAL;
1389 }
1390 data_pos += offset;
1391
1392 /*
1393 * The Info Block CRC is calculated over mxt_info and the object
1394 * table. If it does not match then we are trying to load the
1395 * configuration from a different chip or firmware version, so
1396 * the configuration CRC is invalid anyway.
1397 */
1398 if (info_crc == data->info_crc) {
1399 if (config_crc == 0 || data->config_crc == 0) {
1400 dev_info(dev, "CRC zero, attempting to apply config\n");
1401 } else if (config_crc == data->config_crc) {
1402 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1403 data->config_crc);
1404 return 0;
1405 } else {
1406 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1407 data->config_crc, config_crc);
1408 }
1409 } else {
1410 dev_warn(dev,
1411 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1412 data->info_crc, info_crc);
1413 }
1414
1415 /* Malloc memory to store configuration */
1416 cfg_start_ofs = MXT_OBJECT_START +
1417 data->info.object_num * sizeof(struct mxt_object) +
1418 MXT_INFO_CHECKSUM_SIZE;
1419 config_mem_size = data->mem_size - cfg_start_ofs;
1420 config_mem = kzalloc(config_mem_size, GFP_KERNEL);
1421 if (!config_mem) {
1422 dev_err(dev, "Failed to allocate memory\n");
1423 return -ENOMEM;
1424 }
1425
1426 ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
1427 config_mem, config_mem_size);
1428 if (ret)
1429 goto release_mem;
1430
1431 /* Calculate crc of the received configs (not the raw config file) */
1432 if (data->T7_address < cfg_start_ofs) {
1433 dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
1434 data->T7_address, cfg_start_ofs);
1435 ret = 0;
1436 goto release_mem;
1437 }
1438
1439 calculated_crc = mxt_calculate_crc(config_mem,
1440 data->T7_address - cfg_start_ofs,
1441 config_mem_size);
1442
1443 if (config_crc > 0 && config_crc != calculated_crc)
1444 dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
1445 calculated_crc, config_crc);
1446
1447 ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
1448 config_mem, config_mem_size);
1449 if (ret)
1450 goto release_mem;
1451
1452 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1453
1454 ret = mxt_soft_reset(data);
1455 if (ret)
1456 goto release_mem;
1457
1458 dev_info(dev, "Config successfully updated\n");
1459
1460 /* T7 config may have changed */
1461 mxt_init_t7_power_cfg(data);
1462
1463 release_mem:
1464 kfree(config_mem);
1465 return ret;
1466 }
1467
1468 static int mxt_acquire_irq(struct mxt_data *data)
1469 {
1470 int error;
1471
1472 enable_irq(data->irq);
1473
1474 error = mxt_process_messages_until_invalid(data);
1475 if (error)
1476 return error;
1477
1478 return 0;
1479 }
1480
1481 static int mxt_get_info(struct mxt_data *data)
1482 {
1483 struct i2c_client *client = data->client;
1484 struct mxt_info *info = &data->info;
1485 int error;
1486
1487 /* Read 7-byte info block starting at address 0 */
1488 error = __mxt_read_reg(client, 0, sizeof(*info), info);
1489 if (error)
1490 return error;
1491
1492 return 0;
1493 }
1494
1495 static void mxt_free_input_device(struct mxt_data *data)
1496 {
1497 if (data->input_dev) {
1498 input_unregister_device(data->input_dev);
1499 data->input_dev = NULL;
1500 }
1501 }
1502
1503 static void mxt_free_object_table(struct mxt_data *data)
1504 {
1505 kfree(data->object_table);
1506 data->object_table = NULL;
1507 kfree(data->msg_buf);
1508 data->msg_buf = NULL;
1509 data->T5_address = 0;
1510 data->T5_msg_size = 0;
1511 data->T6_reportid = 0;
1512 data->T7_address = 0;
1513 data->T9_reportid_min = 0;
1514 data->T9_reportid_max = 0;
1515 data->T19_reportid = 0;
1516 data->T44_address = 0;
1517 data->T100_reportid_min = 0;
1518 data->T100_reportid_max = 0;
1519 data->max_reportid = 0;
1520 }
1521
1522 static int mxt_get_object_table(struct mxt_data *data)
1523 {
1524 struct i2c_client *client = data->client;
1525 size_t table_size;
1526 struct mxt_object *object_table;
1527 int error;
1528 int i;
1529 u8 reportid;
1530 u16 end_address;
1531
1532 table_size = data->info.object_num * sizeof(struct mxt_object);
1533 object_table = kzalloc(table_size, GFP_KERNEL);
1534 if (!object_table) {
1535 dev_err(&data->client->dev, "Failed to allocate memory\n");
1536 return -ENOMEM;
1537 }
1538
1539 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
1540 object_table);
1541 if (error) {
1542 kfree(object_table);
1543 return error;
1544 }
1545
1546 /* Valid Report IDs start counting from 1 */
1547 reportid = 1;
1548 data->mem_size = 0;
1549 for (i = 0; i < data->info.object_num; i++) {
1550 struct mxt_object *object = object_table + i;
1551 u8 min_id, max_id;
1552
1553 le16_to_cpus(&object->start_address);
1554
1555 if (object->num_report_ids) {
1556 min_id = reportid;
1557 reportid += object->num_report_ids *
1558 mxt_obj_instances(object);
1559 max_id = reportid - 1;
1560 } else {
1561 min_id = 0;
1562 max_id = 0;
1563 }
1564
1565 dev_dbg(&data->client->dev,
1566 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1567 object->type, object->start_address,
1568 mxt_obj_size(object), mxt_obj_instances(object),
1569 min_id, max_id);
1570
1571 switch (object->type) {
1572 case MXT_GEN_MESSAGE_T5:
1573 if (data->info.family_id == 0x80 &&
1574 data->info.version < 0x20) {
1575 /*
1576 * On mXT224 firmware versions prior to V2.0
1577 * read and discard unused CRC byte otherwise
1578 * DMA reads are misaligned.
1579 */
1580 data->T5_msg_size = mxt_obj_size(object);
1581 } else {
1582 /* CRC not enabled, so skip last byte */
1583 data->T5_msg_size = mxt_obj_size(object) - 1;
1584 }
1585 data->T5_address = object->start_address;
1586 break;
1587 case MXT_GEN_COMMAND_T6:
1588 data->T6_reportid = min_id;
1589 data->T6_address = object->start_address;
1590 break;
1591 case MXT_GEN_POWER_T7:
1592 data->T7_address = object->start_address;
1593 break;
1594 case MXT_TOUCH_MULTI_T9:
1595 data->multitouch = MXT_TOUCH_MULTI_T9;
1596 data->T9_reportid_min = min_id;
1597 data->T9_reportid_max = max_id;
1598 data->num_touchids = object->num_report_ids
1599 * mxt_obj_instances(object);
1600 break;
1601 case MXT_SPT_MESSAGECOUNT_T44:
1602 data->T44_address = object->start_address;
1603 break;
1604 case MXT_SPT_GPIOPWM_T19:
1605 data->T19_reportid = min_id;
1606 break;
1607 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1608 data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1609 data->T100_reportid_min = min_id;
1610 data->T100_reportid_max = max_id;
1611 /* first two report IDs reserved */
1612 data->num_touchids = object->num_report_ids - 2;
1613 break;
1614 }
1615
1616 end_address = object->start_address
1617 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1618
1619 if (end_address >= data->mem_size)
1620 data->mem_size = end_address + 1;
1621 }
1622
1623 /* Store maximum reportid */
1624 data->max_reportid = reportid;
1625
1626 /* If T44 exists, T5 position has to be directly after */
1627 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1628 dev_err(&client->dev, "Invalid T44 position\n");
1629 error = -EINVAL;
1630 goto free_object_table;
1631 }
1632
1633 data->msg_buf = kcalloc(data->max_reportid,
1634 data->T5_msg_size, GFP_KERNEL);
1635 if (!data->msg_buf) {
1636 dev_err(&client->dev, "Failed to allocate message buffer\n");
1637 error = -ENOMEM;
1638 goto free_object_table;
1639 }
1640
1641 data->object_table = object_table;
1642
1643 return 0;
1644
1645 free_object_table:
1646 mxt_free_object_table(data);
1647 return error;
1648 }
1649
1650 static int mxt_read_t9_resolution(struct mxt_data *data)
1651 {
1652 struct i2c_client *client = data->client;
1653 int error;
1654 struct t9_range range;
1655 unsigned char orient;
1656 struct mxt_object *object;
1657
1658 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1659 if (!object)
1660 return -EINVAL;
1661
1662 error = __mxt_read_reg(client,
1663 object->start_address + MXT_T9_RANGE,
1664 sizeof(range), &range);
1665 if (error)
1666 return error;
1667
1668 le16_to_cpus(&range.x);
1669 le16_to_cpus(&range.y);
1670
1671 error = __mxt_read_reg(client,
1672 object->start_address + MXT_T9_ORIENT,
1673 1, &orient);
1674 if (error)
1675 return error;
1676
1677 /* Handle default values */
1678 if (range.x == 0)
1679 range.x = 1023;
1680
1681 if (range.y == 0)
1682 range.y = 1023;
1683
1684 if (orient & MXT_T9_ORIENT_SWITCH) {
1685 data->max_x = range.y;
1686 data->max_y = range.x;
1687 } else {
1688 data->max_x = range.x;
1689 data->max_y = range.y;
1690 }
1691
1692 dev_dbg(&client->dev,
1693 "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1694
1695 return 0;
1696 }
1697
1698 static int mxt_read_t100_config(struct mxt_data *data)
1699 {
1700 struct i2c_client *client = data->client;
1701 int error;
1702 struct mxt_object *object;
1703 u16 range_x, range_y;
1704 u8 cfg, tchaux;
1705 u8 aux;
1706
1707 object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1708 if (!object)
1709 return -EINVAL;
1710
1711 error = __mxt_read_reg(client,
1712 object->start_address + MXT_T100_XRANGE,
1713 sizeof(range_x), &range_x);
1714 if (error)
1715 return error;
1716
1717 le16_to_cpus(&range_x);
1718
1719 error = __mxt_read_reg(client,
1720 object->start_address + MXT_T100_YRANGE,
1721 sizeof(range_y), &range_y);
1722 if (error)
1723 return error;
1724
1725 le16_to_cpus(&range_y);
1726
1727 error = __mxt_read_reg(client,
1728 object->start_address + MXT_T100_CFG1,
1729 1, &cfg);
1730 if (error)
1731 return error;
1732
1733 error = __mxt_read_reg(client,
1734 object->start_address + MXT_T100_TCHAUX,
1735 1, &tchaux);
1736 if (error)
1737 return error;
1738
1739 /* Handle default values */
1740 if (range_x == 0)
1741 range_x = 1023;
1742
1743 if (range_y == 0)
1744 range_y = 1023;
1745
1746 if (cfg & MXT_T100_CFG_SWITCHXY) {
1747 data->max_x = range_y;
1748 data->max_y = range_x;
1749 } else {
1750 data->max_x = range_x;
1751 data->max_y = range_y;
1752 }
1753
1754 /* allocate aux bytes */
1755 aux = 6;
1756
1757 if (tchaux & MXT_T100_TCHAUX_VECT)
1758 data->t100_aux_vect = aux++;
1759
1760 if (tchaux & MXT_T100_TCHAUX_AMPL)
1761 data->t100_aux_ampl = aux++;
1762
1763 if (tchaux & MXT_T100_TCHAUX_AREA)
1764 data->t100_aux_area = aux++;
1765
1766 dev_dbg(&client->dev,
1767 "T100 aux mappings vect:%u ampl:%u area:%u\n",
1768 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
1769
1770 dev_info(&client->dev,
1771 "T100 Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1772
1773 return 0;
1774 }
1775
1776 static int mxt_input_open(struct input_dev *dev);
1777 static void mxt_input_close(struct input_dev *dev);
1778
1779 static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
1780 struct mxt_data *data)
1781 {
1782 const struct mxt_platform_data *pdata = data->pdata;
1783 int i;
1784
1785 input_dev->name = "Atmel maXTouch Touchpad";
1786
1787 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1788
1789 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1790 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1791 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1792 MXT_PIXELS_PER_MM);
1793 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1794 MXT_PIXELS_PER_MM);
1795
1796 for (i = 0; i < pdata->t19_num_keys; i++)
1797 if (pdata->t19_keymap[i] != KEY_RESERVED)
1798 input_set_capability(input_dev, EV_KEY,
1799 pdata->t19_keymap[i]);
1800 }
1801
1802 static int mxt_initialize_input_device(struct mxt_data *data)
1803 {
1804 const struct mxt_platform_data *pdata = data->pdata;
1805 struct device *dev = &data->client->dev;
1806 struct input_dev *input_dev;
1807 int error;
1808 unsigned int num_mt_slots;
1809 unsigned int mt_flags = 0;
1810
1811 switch (data->multitouch) {
1812 case MXT_TOUCH_MULTI_T9:
1813 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1814 error = mxt_read_t9_resolution(data);
1815 if (error)
1816 dev_warn(dev, "Failed to initialize T9 resolution\n");
1817 break;
1818
1819 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1820 num_mt_slots = data->num_touchids;
1821 error = mxt_read_t100_config(data);
1822 if (error)
1823 dev_warn(dev, "Failed to read T100 config\n");
1824 break;
1825
1826 default:
1827 dev_err(dev, "Invalid multitouch object\n");
1828 return -EINVAL;
1829 }
1830
1831 input_dev = input_allocate_device();
1832 if (!input_dev) {
1833 dev_err(dev, "Failed to allocate memory\n");
1834 return -ENOMEM;
1835 }
1836
1837 input_dev->name = "Atmel maXTouch Touchscreen";
1838 input_dev->phys = data->phys;
1839 input_dev->id.bustype = BUS_I2C;
1840 input_dev->dev.parent = dev;
1841 input_dev->open = mxt_input_open;
1842 input_dev->close = mxt_input_close;
1843
1844 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
1845
1846 /* For single touch */
1847 input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
1848 input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
1849
1850 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1851 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1852 data->t100_aux_ampl)) {
1853 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
1854 }
1855
1856 /* If device has buttons we assume it is a touchpad */
1857 if (pdata->t19_num_keys) {
1858 mxt_set_up_as_touchpad(input_dev, data);
1859 mt_flags |= INPUT_MT_POINTER;
1860 } else {
1861 mt_flags |= INPUT_MT_DIRECT;
1862 }
1863
1864 /* For multi touch */
1865 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1866 if (error) {
1867 dev_err(dev, "Error %d initialising slots\n", error);
1868 goto err_free_mem;
1869 }
1870
1871 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
1872 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
1873 0, MT_TOOL_MAX, 0, 0);
1874 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
1875 MXT_DISTANCE_ACTIVE_TOUCH,
1876 MXT_DISTANCE_HOVERING,
1877 0, 0);
1878 }
1879
1880 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1881 0, data->max_x, 0, 0);
1882 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1883 0, data->max_y, 0, 0);
1884
1885 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1886 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1887 data->t100_aux_area)) {
1888 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1889 0, MXT_MAX_AREA, 0, 0);
1890 }
1891
1892 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1893 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1894 data->t100_aux_ampl)) {
1895 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1896 0, 255, 0, 0);
1897 }
1898
1899 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1900 data->t100_aux_vect) {
1901 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1902 0, 255, 0, 0);
1903 }
1904
1905 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1906 data->t100_aux_ampl) {
1907 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1908 0, 255, 0, 0);
1909 }
1910
1911 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1912 data->t100_aux_vect) {
1913 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1914 0, 255, 0, 0);
1915 }
1916
1917 input_set_drvdata(input_dev, data);
1918
1919 error = input_register_device(input_dev);
1920 if (error) {
1921 dev_err(dev, "Error %d registering input device\n", error);
1922 goto err_free_mem;
1923 }
1924
1925 data->input_dev = input_dev;
1926
1927 return 0;
1928
1929 err_free_mem:
1930 input_free_device(input_dev);
1931 return error;
1932 }
1933
1934 static int mxt_configure_objects(struct mxt_data *data,
1935 const struct firmware *cfg);
1936
1937 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
1938 {
1939 mxt_configure_objects(ctx, cfg);
1940 release_firmware(cfg);
1941 }
1942
1943 static int mxt_initialize(struct mxt_data *data)
1944 {
1945 struct i2c_client *client = data->client;
1946 int recovery_attempts = 0;
1947 int error;
1948
1949 while (1) {
1950 error = mxt_get_info(data);
1951 if (!error)
1952 break;
1953
1954 /* Check bootloader state */
1955 error = mxt_probe_bootloader(data, false);
1956 if (error) {
1957 dev_info(&client->dev, "Trying alternate bootloader address\n");
1958 error = mxt_probe_bootloader(data, true);
1959 if (error) {
1960 /* Chip is not in appmode or bootloader mode */
1961 return error;
1962 }
1963 }
1964
1965 /* OK, we are in bootloader, see if we can recover */
1966 if (++recovery_attempts > 1) {
1967 dev_err(&client->dev, "Could not recover from bootloader mode\n");
1968 /*
1969 * We can reflash from this state, so do not
1970 * abort initialization.
1971 */
1972 data->in_bootloader = true;
1973 return 0;
1974 }
1975
1976 /* Attempt to exit bootloader into app mode */
1977 mxt_send_bootloader_cmd(data, false);
1978 msleep(MXT_FW_RESET_TIME);
1979 }
1980
1981 /* Get object table information */
1982 error = mxt_get_object_table(data);
1983 if (error) {
1984 dev_err(&client->dev, "Error %d reading object table\n", error);
1985 return error;
1986 }
1987
1988 error = mxt_acquire_irq(data);
1989 if (error)
1990 goto err_free_object_table;
1991
1992 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
1993 &client->dev, GFP_KERNEL, data,
1994 mxt_config_cb);
1995 if (error) {
1996 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
1997 error);
1998 goto err_free_object_table;
1999 }
2000
2001 return 0;
2002
2003 err_free_object_table:
2004 mxt_free_object_table(data);
2005 return error;
2006 }
2007
2008 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2009 {
2010 struct device *dev = &data->client->dev;
2011 int error;
2012 struct t7_config *new_config;
2013 struct t7_config deepsleep = { .active = 0, .idle = 0 };
2014
2015 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2016 new_config = &deepsleep;
2017 else
2018 new_config = &data->t7_cfg;
2019
2020 error = __mxt_write_reg(data->client, data->T7_address,
2021 sizeof(data->t7_cfg), new_config);
2022 if (error)
2023 return error;
2024
2025 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2026 new_config->active, new_config->idle);
2027
2028 return 0;
2029 }
2030
2031 static int mxt_init_t7_power_cfg(struct mxt_data *data)
2032 {
2033 struct device *dev = &data->client->dev;
2034 int error;
2035 bool retry = false;
2036
2037 recheck:
2038 error = __mxt_read_reg(data->client, data->T7_address,
2039 sizeof(data->t7_cfg), &data->t7_cfg);
2040 if (error)
2041 return error;
2042
2043 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2044 if (!retry) {
2045 dev_dbg(dev, "T7 cfg zero, resetting\n");
2046 mxt_soft_reset(data);
2047 retry = true;
2048 goto recheck;
2049 } else {
2050 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2051 data->t7_cfg.active = 20;
2052 data->t7_cfg.idle = 100;
2053 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2054 }
2055 }
2056
2057 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2058 data->t7_cfg.active, data->t7_cfg.idle);
2059 return 0;
2060 }
2061
2062 static int mxt_configure_objects(struct mxt_data *data,
2063 const struct firmware *cfg)
2064 {
2065 struct device *dev = &data->client->dev;
2066 struct mxt_info *info = &data->info;
2067 int error;
2068
2069 error = mxt_init_t7_power_cfg(data);
2070 if (error) {
2071 dev_err(dev, "Failed to initialize power cfg\n");
2072 return error;
2073 }
2074
2075 if (cfg) {
2076 error = mxt_update_cfg(data, cfg);
2077 if (error)
2078 dev_warn(dev, "Error %d updating config\n", error);
2079 }
2080
2081 if (data->multitouch) {
2082 error = mxt_initialize_input_device(data);
2083 if (error)
2084 return error;
2085 } else {
2086 dev_warn(dev, "No touch object detected\n");
2087 }
2088
2089 dev_info(dev,
2090 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
2091 info->family_id, info->variant_id, info->version >> 4,
2092 info->version & 0xf, info->build, info->object_num);
2093
2094 return 0;
2095 }
2096
2097 /* Firmware Version is returned as Major.Minor.Build */
2098 static ssize_t mxt_fw_version_show(struct device *dev,
2099 struct device_attribute *attr, char *buf)
2100 {
2101 struct mxt_data *data = dev_get_drvdata(dev);
2102 struct mxt_info *info = &data->info;
2103 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
2104 info->version >> 4, info->version & 0xf, info->build);
2105 }
2106
2107 /* Hardware Version is returned as FamilyID.VariantID */
2108 static ssize_t mxt_hw_version_show(struct device *dev,
2109 struct device_attribute *attr, char *buf)
2110 {
2111 struct mxt_data *data = dev_get_drvdata(dev);
2112 struct mxt_info *info = &data->info;
2113 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
2114 info->family_id, info->variant_id);
2115 }
2116
2117 static ssize_t mxt_show_instance(char *buf, int count,
2118 struct mxt_object *object, int instance,
2119 const u8 *val)
2120 {
2121 int i;
2122
2123 if (mxt_obj_instances(object) > 1)
2124 count += scnprintf(buf + count, PAGE_SIZE - count,
2125 "Instance %u\n", instance);
2126
2127 for (i = 0; i < mxt_obj_size(object); i++)
2128 count += scnprintf(buf + count, PAGE_SIZE - count,
2129 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
2130 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
2131
2132 return count;
2133 }
2134
2135 static ssize_t mxt_object_show(struct device *dev,
2136 struct device_attribute *attr, char *buf)
2137 {
2138 struct mxt_data *data = dev_get_drvdata(dev);
2139 struct mxt_object *object;
2140 int count = 0;
2141 int i, j;
2142 int error;
2143 u8 *obuf;
2144
2145 /* Pre-allocate buffer large enough to hold max sized object. */
2146 obuf = kmalloc(256, GFP_KERNEL);
2147 if (!obuf)
2148 return -ENOMEM;
2149
2150 error = 0;
2151 for (i = 0; i < data->info.object_num; i++) {
2152 object = data->object_table + i;
2153
2154 if (!mxt_object_readable(object->type))
2155 continue;
2156
2157 count += scnprintf(buf + count, PAGE_SIZE - count,
2158 "T%u:\n", object->type);
2159
2160 for (j = 0; j < mxt_obj_instances(object); j++) {
2161 u16 size = mxt_obj_size(object);
2162 u16 addr = object->start_address + j * size;
2163
2164 error = __mxt_read_reg(data->client, addr, size, obuf);
2165 if (error)
2166 goto done;
2167
2168 count = mxt_show_instance(buf, count, object, j, obuf);
2169 }
2170 }
2171
2172 done:
2173 kfree(obuf);
2174 return error ?: count;
2175 }
2176
2177 static int mxt_check_firmware_format(struct device *dev,
2178 const struct firmware *fw)
2179 {
2180 unsigned int pos = 0;
2181 char c;
2182
2183 while (pos < fw->size) {
2184 c = *(fw->data + pos);
2185
2186 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2187 return 0;
2188
2189 pos++;
2190 }
2191
2192 /*
2193 * To convert file try:
2194 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2195 */
2196 dev_err(dev, "Aborting: firmware file must be in binary format\n");
2197
2198 return -EINVAL;
2199 }
2200
2201 static int mxt_load_fw(struct device *dev, const char *fn)
2202 {
2203 struct mxt_data *data = dev_get_drvdata(dev);
2204 const struct firmware *fw = NULL;
2205 unsigned int frame_size;
2206 unsigned int pos = 0;
2207 unsigned int retry = 0;
2208 unsigned int frame = 0;
2209 int ret;
2210
2211 ret = request_firmware(&fw, fn, dev);
2212 if (ret) {
2213 dev_err(dev, "Unable to open firmware %s\n", fn);
2214 return ret;
2215 }
2216
2217 /* Check for incorrect enc file */
2218 ret = mxt_check_firmware_format(dev, fw);
2219 if (ret)
2220 goto release_firmware;
2221
2222 if (!data->in_bootloader) {
2223 /* Change to the bootloader mode */
2224 data->in_bootloader = true;
2225
2226 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2227 MXT_BOOT_VALUE, false);
2228 if (ret)
2229 goto release_firmware;
2230
2231 msleep(MXT_RESET_TIME);
2232
2233 /* Do not need to scan since we know family ID */
2234 ret = mxt_lookup_bootloader_address(data, 0);
2235 if (ret)
2236 goto release_firmware;
2237
2238 mxt_free_input_device(data);
2239 mxt_free_object_table(data);
2240 } else {
2241 enable_irq(data->irq);
2242 }
2243
2244 reinit_completion(&data->bl_completion);
2245
2246 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2247 if (ret) {
2248 /* Bootloader may still be unlocked from previous attempt */
2249 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2250 if (ret)
2251 goto disable_irq;
2252 } else {
2253 dev_info(dev, "Unlocking bootloader\n");
2254
2255 /* Unlock bootloader */
2256 ret = mxt_send_bootloader_cmd(data, true);
2257 if (ret)
2258 goto disable_irq;
2259 }
2260
2261 while (pos < fw->size) {
2262 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
2263 if (ret)
2264 goto disable_irq;
2265
2266 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2267
2268 /* Take account of CRC bytes */
2269 frame_size += 2;
2270
2271 /* Write one frame to device */
2272 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2273 if (ret)
2274 goto disable_irq;
2275
2276 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
2277 if (ret) {
2278 retry++;
2279
2280 /* Back off by 20ms per retry */
2281 msleep(retry * 20);
2282
2283 if (retry > 20) {
2284 dev_err(dev, "Retry count exceeded\n");
2285 goto disable_irq;
2286 }
2287 } else {
2288 retry = 0;
2289 pos += frame_size;
2290 frame++;
2291 }
2292
2293 if (frame % 50 == 0)
2294 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2295 frame, pos, fw->size);
2296 }
2297
2298 /* Wait for flash. */
2299 ret = mxt_wait_for_completion(data, &data->bl_completion,
2300 MXT_FW_RESET_TIME);
2301 if (ret)
2302 goto disable_irq;
2303
2304 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2305
2306 /*
2307 * Wait for device to reset. Some bootloader versions do not assert
2308 * the CHG line after bootloading has finished, so ignore potential
2309 * errors.
2310 */
2311 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
2312
2313 data->in_bootloader = false;
2314
2315 disable_irq:
2316 disable_irq(data->irq);
2317 release_firmware:
2318 release_firmware(fw);
2319 return ret;
2320 }
2321
2322 static ssize_t mxt_update_fw_store(struct device *dev,
2323 struct device_attribute *attr,
2324 const char *buf, size_t count)
2325 {
2326 struct mxt_data *data = dev_get_drvdata(dev);
2327 int error;
2328
2329 error = mxt_load_fw(dev, MXT_FW_NAME);
2330 if (error) {
2331 dev_err(dev, "The firmware update failed(%d)\n", error);
2332 count = error;
2333 } else {
2334 dev_info(dev, "The firmware update succeeded\n");
2335
2336 error = mxt_initialize(data);
2337 if (error)
2338 return error;
2339 }
2340
2341 return count;
2342 }
2343
2344 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2345 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
2346 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2347 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
2348
2349 static struct attribute *mxt_attrs[] = {
2350 &dev_attr_fw_version.attr,
2351 &dev_attr_hw_version.attr,
2352 &dev_attr_object.attr,
2353 &dev_attr_update_fw.attr,
2354 NULL
2355 };
2356
2357 static const struct attribute_group mxt_attr_group = {
2358 .attrs = mxt_attrs,
2359 };
2360
2361 static void mxt_start(struct mxt_data *data)
2362 {
2363 switch (data->pdata->suspend_mode) {
2364 case MXT_SUSPEND_T9_CTRL:
2365 mxt_soft_reset(data);
2366
2367 /* Touch enable */
2368 /* 0x83 = SCANEN | RPTEN | ENABLE */
2369 mxt_write_object(data,
2370 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
2371 break;
2372
2373 case MXT_SUSPEND_DEEP_SLEEP:
2374 default:
2375 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2376
2377 /* Recalibrate since chip has been in deep sleep */
2378 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
2379 break;
2380 }
2381
2382 }
2383
2384 static void mxt_stop(struct mxt_data *data)
2385 {
2386 switch (data->pdata->suspend_mode) {
2387 case MXT_SUSPEND_T9_CTRL:
2388 /* Touch disable */
2389 mxt_write_object(data,
2390 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
2391 break;
2392
2393 case MXT_SUSPEND_DEEP_SLEEP:
2394 default:
2395 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
2396 break;
2397 }
2398 }
2399
2400 static int mxt_input_open(struct input_dev *dev)
2401 {
2402 struct mxt_data *data = input_get_drvdata(dev);
2403
2404 mxt_start(data);
2405
2406 return 0;
2407 }
2408
2409 static void mxt_input_close(struct input_dev *dev)
2410 {
2411 struct mxt_data *data = input_get_drvdata(dev);
2412
2413 mxt_stop(data);
2414 }
2415
2416 #ifdef CONFIG_OF
2417 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2418 {
2419 struct mxt_platform_data *pdata;
2420 struct device_node *np = client->dev.of_node;
2421 u32 *keymap;
2422 int proplen, ret;
2423
2424 if (!np)
2425 return ERR_PTR(-ENOENT);
2426
2427 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
2428 if (!pdata)
2429 return ERR_PTR(-ENOMEM);
2430
2431 if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
2432 pdata->t19_num_keys = proplen / sizeof(u32);
2433
2434 keymap = devm_kzalloc(&client->dev,
2435 pdata->t19_num_keys * sizeof(keymap[0]),
2436 GFP_KERNEL);
2437 if (!keymap)
2438 return ERR_PTR(-ENOMEM);
2439
2440 ret = of_property_read_u32_array(np, "linux,gpio-keymap",
2441 keymap, pdata->t19_num_keys);
2442 if (ret)
2443 dev_warn(&client->dev,
2444 "Couldn't read linux,gpio-keymap: %d\n", ret);
2445
2446 pdata->t19_keymap = keymap;
2447 }
2448
2449 pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
2450
2451 return pdata;
2452 }
2453 #else
2454 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2455 {
2456 return ERR_PTR(-ENOENT);
2457 }
2458 #endif
2459
2460 #ifdef CONFIG_ACPI
2461
2462 struct mxt_acpi_platform_data {
2463 const char *hid;
2464 struct mxt_platform_data pdata;
2465 };
2466
2467 static unsigned int samus_touchpad_buttons[] = {
2468 KEY_RESERVED,
2469 KEY_RESERVED,
2470 KEY_RESERVED,
2471 BTN_LEFT
2472 };
2473
2474 static struct mxt_acpi_platform_data samus_platform_data[] = {
2475 {
2476 /* Touchpad */
2477 .hid = "ATML0000",
2478 .pdata = {
2479 .t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons),
2480 .t19_keymap = samus_touchpad_buttons,
2481 },
2482 },
2483 {
2484 /* Touchscreen */
2485 .hid = "ATML0001",
2486 },
2487 { }
2488 };
2489
2490 static unsigned int chromebook_tp_buttons[] = {
2491 KEY_RESERVED,
2492 KEY_RESERVED,
2493 KEY_RESERVED,
2494 KEY_RESERVED,
2495 KEY_RESERVED,
2496 BTN_LEFT
2497 };
2498
2499 static struct mxt_acpi_platform_data chromebook_platform_data[] = {
2500 {
2501 /* Touchpad */
2502 .hid = "ATML0000",
2503 .pdata = {
2504 .t19_num_keys = ARRAY_SIZE(chromebook_tp_buttons),
2505 .t19_keymap = chromebook_tp_buttons,
2506 },
2507 },
2508 {
2509 /* Touchscreen */
2510 .hid = "ATML0001",
2511 },
2512 { }
2513 };
2514
2515 static const struct dmi_system_id mxt_dmi_table[] = {
2516 {
2517 /* 2015 Google Pixel */
2518 .ident = "Chromebook Pixel 2",
2519 .matches = {
2520 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
2521 DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
2522 },
2523 .driver_data = samus_platform_data,
2524 },
2525 {
2526 /* Other Google Chromebooks */
2527 .ident = "Chromebook",
2528 .matches = {
2529 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
2530 },
2531 .driver_data = chromebook_platform_data,
2532 },
2533 { }
2534 };
2535
2536 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
2537 {
2538 struct acpi_device *adev;
2539 const struct dmi_system_id *system_id;
2540 const struct mxt_acpi_platform_data *acpi_pdata;
2541
2542 /*
2543 * Ignore ACPI devices representing bootloader mode.
2544 *
2545 * This is a bit of a hack: Google Chromebook BIOS creates ACPI
2546 * devices for both application and bootloader modes, but we are
2547 * interested in application mode only (if device is in bootloader
2548 * mode we'll end up switching into application anyway). So far
2549 * application mode addresses were all above 0x40, so we'll use it
2550 * as a threshold.
2551 */
2552 if (client->addr < 0x40)
2553 return ERR_PTR(-ENXIO);
2554
2555 adev = ACPI_COMPANION(&client->dev);
2556 if (!adev)
2557 return ERR_PTR(-ENOENT);
2558
2559 system_id = dmi_first_match(mxt_dmi_table);
2560 if (!system_id)
2561 return ERR_PTR(-ENOENT);
2562
2563 acpi_pdata = system_id->driver_data;
2564 if (!acpi_pdata)
2565 return ERR_PTR(-ENOENT);
2566
2567 while (acpi_pdata->hid) {
2568 if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid))
2569 return &acpi_pdata->pdata;
2570
2571 acpi_pdata++;
2572 }
2573
2574 return ERR_PTR(-ENOENT);
2575 }
2576 #else
2577 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
2578 {
2579 return ERR_PTR(-ENOENT);
2580 }
2581 #endif
2582
2583 static const struct mxt_platform_data *
2584 mxt_get_platform_data(struct i2c_client *client)
2585 {
2586 const struct mxt_platform_data *pdata;
2587
2588 pdata = dev_get_platdata(&client->dev);
2589 if (pdata)
2590 return pdata;
2591
2592 pdata = mxt_parse_dt(client);
2593 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
2594 return pdata;
2595
2596 pdata = mxt_parse_acpi(client);
2597 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
2598 return pdata;
2599
2600 dev_err(&client->dev, "No platform data specified\n");
2601 return ERR_PTR(-EINVAL);
2602 }
2603
2604 static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
2605 {
2606 struct mxt_data *data;
2607 const struct mxt_platform_data *pdata;
2608 int error;
2609
2610 pdata = mxt_get_platform_data(client);
2611 if (IS_ERR(pdata))
2612 return PTR_ERR(pdata);
2613
2614 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
2615 if (!data) {
2616 dev_err(&client->dev, "Failed to allocate memory\n");
2617 return -ENOMEM;
2618 }
2619
2620 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
2621 client->adapter->nr, client->addr);
2622
2623 data->client = client;
2624 data->pdata = pdata;
2625 data->irq = client->irq;
2626 i2c_set_clientdata(client, data);
2627
2628 init_completion(&data->bl_completion);
2629 init_completion(&data->reset_completion);
2630 init_completion(&data->crc_completion);
2631
2632 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
2633 pdata->irqflags | IRQF_ONESHOT,
2634 client->name, data);
2635 if (error) {
2636 dev_err(&client->dev, "Failed to register interrupt\n");
2637 goto err_free_mem;
2638 }
2639
2640 disable_irq(client->irq);
2641
2642 error = mxt_initialize(data);
2643 if (error)
2644 goto err_free_irq;
2645
2646 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
2647 if (error) {
2648 dev_err(&client->dev, "Failure %d creating sysfs group\n",
2649 error);
2650 goto err_free_object;
2651 }
2652
2653 return 0;
2654
2655 err_free_object:
2656 mxt_free_input_device(data);
2657 mxt_free_object_table(data);
2658 err_free_irq:
2659 free_irq(client->irq, data);
2660 err_free_mem:
2661 kfree(data);
2662 return error;
2663 }
2664
2665 static int mxt_remove(struct i2c_client *client)
2666 {
2667 struct mxt_data *data = i2c_get_clientdata(client);
2668
2669 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
2670 free_irq(data->irq, data);
2671 mxt_free_input_device(data);
2672 mxt_free_object_table(data);
2673 kfree(data);
2674
2675 return 0;
2676 }
2677
2678 static int __maybe_unused mxt_suspend(struct device *dev)
2679 {
2680 struct i2c_client *client = to_i2c_client(dev);
2681 struct mxt_data *data = i2c_get_clientdata(client);
2682 struct input_dev *input_dev = data->input_dev;
2683
2684 if (!input_dev)
2685 return 0;
2686
2687 mutex_lock(&input_dev->mutex);
2688
2689 if (input_dev->users)
2690 mxt_stop(data);
2691
2692 mutex_unlock(&input_dev->mutex);
2693
2694 return 0;
2695 }
2696
2697 static int __maybe_unused mxt_resume(struct device *dev)
2698 {
2699 struct i2c_client *client = to_i2c_client(dev);
2700 struct mxt_data *data = i2c_get_clientdata(client);
2701 struct input_dev *input_dev = data->input_dev;
2702
2703 if (!input_dev)
2704 return 0;
2705
2706 mutex_lock(&input_dev->mutex);
2707
2708 if (input_dev->users)
2709 mxt_start(data);
2710
2711 mutex_unlock(&input_dev->mutex);
2712
2713 return 0;
2714 }
2715
2716 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
2717
2718 static const struct of_device_id mxt_of_match[] = {
2719 { .compatible = "atmel,maxtouch", },
2720 {},
2721 };
2722 MODULE_DEVICE_TABLE(of, mxt_of_match);
2723
2724 #ifdef CONFIG_ACPI
2725 static const struct acpi_device_id mxt_acpi_id[] = {
2726 { "ATML0000", 0 }, /* Touchpad */
2727 { "ATML0001", 0 }, /* Touchscreen */
2728 { }
2729 };
2730 MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
2731 #endif
2732
2733 static const struct i2c_device_id mxt_id[] = {
2734 { "qt602240_ts", 0 },
2735 { "atmel_mxt_ts", 0 },
2736 { "atmel_mxt_tp", 0 },
2737 { "maxtouch", 0 },
2738 { "mXT224", 0 },
2739 { }
2740 };
2741 MODULE_DEVICE_TABLE(i2c, mxt_id);
2742
2743 static struct i2c_driver mxt_driver = {
2744 .driver = {
2745 .name = "atmel_mxt_ts",
2746 .of_match_table = of_match_ptr(mxt_of_match),
2747 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
2748 .pm = &mxt_pm_ops,
2749 },
2750 .probe = mxt_probe,
2751 .remove = mxt_remove,
2752 .id_table = mxt_id,
2753 };
2754
2755 module_i2c_driver(mxt_driver);
2756
2757 /* Module information */
2758 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
2759 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
2760 MODULE_LICENSE("GPL");
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