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Merge remote-tracking branch 'regulator/fix/max77802' into regulator-linus
[mirror_ubuntu-artful-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 * Copyright (C) 2016 Zodiac Inflight Innovations
8 *
9 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 *
16 */
17
18 #include <linux/acpi.h>
19 #include <linux/dmi.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/completion.h>
23 #include <linux/delay.h>
24 #include <linux/firmware.h>
25 #include <linux/i2c.h>
26 #include <linux/platform_data/atmel_mxt_ts.h>
27 #include <linux/input/mt.h>
28 #include <linux/interrupt.h>
29 #include <linux/of.h>
30 #include <linux/slab.h>
31 #include <asm/unaligned.h>
32 #include <media/v4l2-device.h>
33 #include <media/v4l2-ioctl.h>
34 #include <media/videobuf2-v4l2.h>
35 #include <media/videobuf2-vmalloc.h>
36
37 /* Firmware files */
38 #define MXT_FW_NAME "maxtouch.fw"
39 #define MXT_CFG_NAME "maxtouch.cfg"
40 #define MXT_CFG_MAGIC "OBP_RAW V1"
41
42 /* Registers */
43 #define MXT_OBJECT_START 0x07
44 #define MXT_OBJECT_SIZE 6
45 #define MXT_INFO_CHECKSUM_SIZE 3
46 #define MXT_MAX_BLOCK_WRITE 256
47
48 /* Object types */
49 #define MXT_DEBUG_DIAGNOSTIC_T37 37
50 #define MXT_GEN_MESSAGE_T5 5
51 #define MXT_GEN_COMMAND_T6 6
52 #define MXT_GEN_POWER_T7 7
53 #define MXT_GEN_ACQUIRE_T8 8
54 #define MXT_GEN_DATASOURCE_T53 53
55 #define MXT_TOUCH_MULTI_T9 9
56 #define MXT_TOUCH_KEYARRAY_T15 15
57 #define MXT_TOUCH_PROXIMITY_T23 23
58 #define MXT_TOUCH_PROXKEY_T52 52
59 #define MXT_PROCI_GRIPFACE_T20 20
60 #define MXT_PROCG_NOISE_T22 22
61 #define MXT_PROCI_ONETOUCH_T24 24
62 #define MXT_PROCI_TWOTOUCH_T27 27
63 #define MXT_PROCI_GRIP_T40 40
64 #define MXT_PROCI_PALM_T41 41
65 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
66 #define MXT_PROCI_STYLUS_T47 47
67 #define MXT_PROCG_NOISESUPPRESSION_T48 48
68 #define MXT_SPT_COMMSCONFIG_T18 18
69 #define MXT_SPT_GPIOPWM_T19 19
70 #define MXT_SPT_SELFTEST_T25 25
71 #define MXT_SPT_CTECONFIG_T28 28
72 #define MXT_SPT_USERDATA_T38 38
73 #define MXT_SPT_DIGITIZER_T43 43
74 #define MXT_SPT_MESSAGECOUNT_T44 44
75 #define MXT_SPT_CTECONFIG_T46 46
76 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
77
78 /* MXT_GEN_MESSAGE_T5 object */
79 #define MXT_RPTID_NOMSG 0xff
80
81 /* MXT_GEN_COMMAND_T6 field */
82 #define MXT_COMMAND_RESET 0
83 #define MXT_COMMAND_BACKUPNV 1
84 #define MXT_COMMAND_CALIBRATE 2
85 #define MXT_COMMAND_REPORTALL 3
86 #define MXT_COMMAND_DIAGNOSTIC 5
87
88 /* Define for T6 status byte */
89 #define MXT_T6_STATUS_RESET (1 << 7)
90 #define MXT_T6_STATUS_OFL (1 << 6)
91 #define MXT_T6_STATUS_SIGERR (1 << 5)
92 #define MXT_T6_STATUS_CAL (1 << 4)
93 #define MXT_T6_STATUS_CFGERR (1 << 3)
94 #define MXT_T6_STATUS_COMSERR (1 << 2)
95
96 /* MXT_GEN_POWER_T7 field */
97 struct t7_config {
98 u8 idle;
99 u8 active;
100 } __packed;
101
102 #define MXT_POWER_CFG_RUN 0
103 #define MXT_POWER_CFG_DEEPSLEEP 1
104
105 /* MXT_TOUCH_MULTI_T9 field */
106 #define MXT_T9_CTRL 0
107 #define MXT_T9_XSIZE 3
108 #define MXT_T9_YSIZE 4
109 #define MXT_T9_ORIENT 9
110 #define MXT_T9_RANGE 18
111
112 /* MXT_TOUCH_MULTI_T9 status */
113 #define MXT_T9_UNGRIP (1 << 0)
114 #define MXT_T9_SUPPRESS (1 << 1)
115 #define MXT_T9_AMP (1 << 2)
116 #define MXT_T9_VECTOR (1 << 3)
117 #define MXT_T9_MOVE (1 << 4)
118 #define MXT_T9_RELEASE (1 << 5)
119 #define MXT_T9_PRESS (1 << 6)
120 #define MXT_T9_DETECT (1 << 7)
121
122 struct t9_range {
123 __le16 x;
124 __le16 y;
125 } __packed;
126
127 /* MXT_TOUCH_MULTI_T9 orient */
128 #define MXT_T9_ORIENT_SWITCH (1 << 0)
129 #define MXT_T9_ORIENT_INVERTX (1 << 1)
130 #define MXT_T9_ORIENT_INVERTY (1 << 2)
131
132 /* MXT_SPT_COMMSCONFIG_T18 */
133 #define MXT_COMMS_CTRL 0
134 #define MXT_COMMS_CMD 1
135
136 /* MXT_DEBUG_DIAGNOSTIC_T37 */
137 #define MXT_DIAGNOSTIC_PAGEUP 0x01
138 #define MXT_DIAGNOSTIC_DELTAS 0x10
139 #define MXT_DIAGNOSTIC_REFS 0x11
140 #define MXT_DIAGNOSTIC_SIZE 128
141
142 #define MXT_FAMILY_1386 160
143 #define MXT1386_COLUMNS 3
144 #define MXT1386_PAGES_PER_COLUMN 8
145
146 struct t37_debug {
147 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
148 u8 mode;
149 u8 page;
150 u8 data[MXT_DIAGNOSTIC_SIZE];
151 #endif
152 };
153
154 /* Define for MXT_GEN_COMMAND_T6 */
155 #define MXT_BOOT_VALUE 0xa5
156 #define MXT_RESET_VALUE 0x01
157 #define MXT_BACKUP_VALUE 0x55
158
159 /* T100 Multiple Touch Touchscreen */
160 #define MXT_T100_CTRL 0
161 #define MXT_T100_CFG1 1
162 #define MXT_T100_TCHAUX 3
163 #define MXT_T100_XSIZE 9
164 #define MXT_T100_XRANGE 13
165 #define MXT_T100_YSIZE 20
166 #define MXT_T100_YRANGE 24
167
168 #define MXT_T100_CFG_SWITCHXY BIT(5)
169 #define MXT_T100_CFG_INVERTY BIT(6)
170 #define MXT_T100_CFG_INVERTX BIT(7)
171
172 #define MXT_T100_TCHAUX_VECT BIT(0)
173 #define MXT_T100_TCHAUX_AMPL BIT(1)
174 #define MXT_T100_TCHAUX_AREA BIT(2)
175
176 #define MXT_T100_DETECT BIT(7)
177 #define MXT_T100_TYPE_MASK 0x70
178
179 enum t100_type {
180 MXT_T100_TYPE_FINGER = 1,
181 MXT_T100_TYPE_PASSIVE_STYLUS = 2,
182 MXT_T100_TYPE_HOVERING_FINGER = 4,
183 MXT_T100_TYPE_GLOVE = 5,
184 MXT_T100_TYPE_LARGE_TOUCH = 6,
185 };
186
187 #define MXT_DISTANCE_ACTIVE_TOUCH 0
188 #define MXT_DISTANCE_HOVERING 1
189
190 #define MXT_TOUCH_MAJOR_DEFAULT 1
191 #define MXT_PRESSURE_DEFAULT 1
192
193 /* Delay times */
194 #define MXT_BACKUP_TIME 50 /* msec */
195 #define MXT_RESET_TIME 200 /* msec */
196 #define MXT_RESET_TIMEOUT 3000 /* msec */
197 #define MXT_CRC_TIMEOUT 1000 /* msec */
198 #define MXT_FW_RESET_TIME 3000 /* msec */
199 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
200
201 /* Command to unlock bootloader */
202 #define MXT_UNLOCK_CMD_MSB 0xaa
203 #define MXT_UNLOCK_CMD_LSB 0xdc
204
205 /* Bootloader mode status */
206 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
207 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
208 #define MXT_FRAME_CRC_CHECK 0x02
209 #define MXT_FRAME_CRC_FAIL 0x03
210 #define MXT_FRAME_CRC_PASS 0x04
211 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
212 #define MXT_BOOT_STATUS_MASK 0x3f
213 #define MXT_BOOT_EXTENDED_ID (1 << 5)
214 #define MXT_BOOT_ID_MASK 0x1f
215
216 /* Touchscreen absolute values */
217 #define MXT_MAX_AREA 0xff
218
219 #define MXT_PIXELS_PER_MM 20
220
221 struct mxt_info {
222 u8 family_id;
223 u8 variant_id;
224 u8 version;
225 u8 build;
226 u8 matrix_xsize;
227 u8 matrix_ysize;
228 u8 object_num;
229 };
230
231 struct mxt_object {
232 u8 type;
233 u16 start_address;
234 u8 size_minus_one;
235 u8 instances_minus_one;
236 u8 num_report_ids;
237 } __packed;
238
239 struct mxt_dbg {
240 u16 t37_address;
241 u16 diag_cmd_address;
242 struct t37_debug *t37_buf;
243 unsigned int t37_pages;
244 unsigned int t37_nodes;
245
246 struct v4l2_device v4l2;
247 struct v4l2_pix_format format;
248 struct video_device vdev;
249 struct vb2_queue queue;
250 struct mutex lock;
251 int input;
252 };
253
254 enum v4l_dbg_inputs {
255 MXT_V4L_INPUT_DELTAS,
256 MXT_V4L_INPUT_REFS,
257 MXT_V4L_INPUT_MAX,
258 };
259
260 static const struct v4l2_file_operations mxt_video_fops = {
261 .owner = THIS_MODULE,
262 .open = v4l2_fh_open,
263 .release = vb2_fop_release,
264 .unlocked_ioctl = video_ioctl2,
265 .read = vb2_fop_read,
266 .mmap = vb2_fop_mmap,
267 .poll = vb2_fop_poll,
268 };
269
270 /* Each client has this additional data */
271 struct mxt_data {
272 struct i2c_client *client;
273 struct input_dev *input_dev;
274 char phys[64]; /* device physical location */
275 const struct mxt_platform_data *pdata;
276 struct mxt_object *object_table;
277 struct mxt_info info;
278 unsigned int irq;
279 unsigned int max_x;
280 unsigned int max_y;
281 bool invertx;
282 bool inverty;
283 bool xy_switch;
284 u8 xsize;
285 u8 ysize;
286 bool in_bootloader;
287 u16 mem_size;
288 u8 t100_aux_ampl;
289 u8 t100_aux_area;
290 u8 t100_aux_vect;
291 u8 max_reportid;
292 u32 config_crc;
293 u32 info_crc;
294 u8 bootloader_addr;
295 u8 *msg_buf;
296 u8 t6_status;
297 bool update_input;
298 u8 last_message_count;
299 u8 num_touchids;
300 u8 multitouch;
301 struct t7_config t7_cfg;
302 struct mxt_dbg dbg;
303
304 /* Cached parameters from object table */
305 u16 T5_address;
306 u8 T5_msg_size;
307 u8 T6_reportid;
308 u16 T6_address;
309 u16 T7_address;
310 u8 T9_reportid_min;
311 u8 T9_reportid_max;
312 u8 T19_reportid;
313 u16 T44_address;
314 u8 T100_reportid_min;
315 u8 T100_reportid_max;
316
317 /* for fw update in bootloader */
318 struct completion bl_completion;
319
320 /* for reset handling */
321 struct completion reset_completion;
322
323 /* for config update handling */
324 struct completion crc_completion;
325 };
326
327 struct mxt_vb2_buffer {
328 struct vb2_buffer vb;
329 struct list_head list;
330 };
331
332 static size_t mxt_obj_size(const struct mxt_object *obj)
333 {
334 return obj->size_minus_one + 1;
335 }
336
337 static size_t mxt_obj_instances(const struct mxt_object *obj)
338 {
339 return obj->instances_minus_one + 1;
340 }
341
342 static bool mxt_object_readable(unsigned int type)
343 {
344 switch (type) {
345 case MXT_GEN_COMMAND_T6:
346 case MXT_GEN_POWER_T7:
347 case MXT_GEN_ACQUIRE_T8:
348 case MXT_GEN_DATASOURCE_T53:
349 case MXT_TOUCH_MULTI_T9:
350 case MXT_TOUCH_KEYARRAY_T15:
351 case MXT_TOUCH_PROXIMITY_T23:
352 case MXT_TOUCH_PROXKEY_T52:
353 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
354 case MXT_PROCI_GRIPFACE_T20:
355 case MXT_PROCG_NOISE_T22:
356 case MXT_PROCI_ONETOUCH_T24:
357 case MXT_PROCI_TWOTOUCH_T27:
358 case MXT_PROCI_GRIP_T40:
359 case MXT_PROCI_PALM_T41:
360 case MXT_PROCI_TOUCHSUPPRESSION_T42:
361 case MXT_PROCI_STYLUS_T47:
362 case MXT_PROCG_NOISESUPPRESSION_T48:
363 case MXT_SPT_COMMSCONFIG_T18:
364 case MXT_SPT_GPIOPWM_T19:
365 case MXT_SPT_SELFTEST_T25:
366 case MXT_SPT_CTECONFIG_T28:
367 case MXT_SPT_USERDATA_T38:
368 case MXT_SPT_DIGITIZER_T43:
369 case MXT_SPT_CTECONFIG_T46:
370 return true;
371 default:
372 return false;
373 }
374 }
375
376 static void mxt_dump_message(struct mxt_data *data, u8 *message)
377 {
378 dev_dbg(&data->client->dev, "message: %*ph\n",
379 data->T5_msg_size, message);
380 }
381
382 static int mxt_wait_for_completion(struct mxt_data *data,
383 struct completion *comp,
384 unsigned int timeout_ms)
385 {
386 struct device *dev = &data->client->dev;
387 unsigned long timeout = msecs_to_jiffies(timeout_ms);
388 long ret;
389
390 ret = wait_for_completion_interruptible_timeout(comp, timeout);
391 if (ret < 0) {
392 return ret;
393 } else if (ret == 0) {
394 dev_err(dev, "Wait for completion timed out.\n");
395 return -ETIMEDOUT;
396 }
397 return 0;
398 }
399
400 static int mxt_bootloader_read(struct mxt_data *data,
401 u8 *val, unsigned int count)
402 {
403 int ret;
404 struct i2c_msg msg;
405
406 msg.addr = data->bootloader_addr;
407 msg.flags = data->client->flags & I2C_M_TEN;
408 msg.flags |= I2C_M_RD;
409 msg.len = count;
410 msg.buf = val;
411
412 ret = i2c_transfer(data->client->adapter, &msg, 1);
413 if (ret == 1) {
414 ret = 0;
415 } else {
416 ret = ret < 0 ? ret : -EIO;
417 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
418 __func__, ret);
419 }
420
421 return ret;
422 }
423
424 static int mxt_bootloader_write(struct mxt_data *data,
425 const u8 * const val, unsigned int count)
426 {
427 int ret;
428 struct i2c_msg msg;
429
430 msg.addr = data->bootloader_addr;
431 msg.flags = data->client->flags & I2C_M_TEN;
432 msg.len = count;
433 msg.buf = (u8 *)val;
434
435 ret = i2c_transfer(data->client->adapter, &msg, 1);
436 if (ret == 1) {
437 ret = 0;
438 } else {
439 ret = ret < 0 ? ret : -EIO;
440 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
441 __func__, ret);
442 }
443
444 return ret;
445 }
446
447 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
448 {
449 u8 appmode = data->client->addr;
450 u8 bootloader;
451
452 switch (appmode) {
453 case 0x4a:
454 case 0x4b:
455 /* Chips after 1664S use different scheme */
456 if (retry || data->info.family_id >= 0xa2) {
457 bootloader = appmode - 0x24;
458 break;
459 }
460 /* Fall through for normal case */
461 case 0x4c:
462 case 0x4d:
463 case 0x5a:
464 case 0x5b:
465 bootloader = appmode - 0x26;
466 break;
467
468 default:
469 dev_err(&data->client->dev,
470 "Appmode i2c address 0x%02x not found\n",
471 appmode);
472 return -EINVAL;
473 }
474
475 data->bootloader_addr = bootloader;
476 return 0;
477 }
478
479 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
480 {
481 struct device *dev = &data->client->dev;
482 int error;
483 u8 val;
484 bool crc_failure;
485
486 error = mxt_lookup_bootloader_address(data, alt_address);
487 if (error)
488 return error;
489
490 error = mxt_bootloader_read(data, &val, 1);
491 if (error)
492 return error;
493
494 /* Check app crc fail mode */
495 crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
496
497 dev_err(dev, "Detected bootloader, status:%02X%s\n",
498 val, crc_failure ? ", APP_CRC_FAIL" : "");
499
500 return 0;
501 }
502
503 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
504 {
505 struct device *dev = &data->client->dev;
506 u8 buf[3];
507
508 if (val & MXT_BOOT_EXTENDED_ID) {
509 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
510 dev_err(dev, "%s: i2c failure\n", __func__);
511 return val;
512 }
513
514 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
515
516 return buf[0];
517 } else {
518 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
519
520 return val;
521 }
522 }
523
524 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
525 bool wait)
526 {
527 struct device *dev = &data->client->dev;
528 u8 val;
529 int ret;
530
531 recheck:
532 if (wait) {
533 /*
534 * In application update mode, the interrupt
535 * line signals state transitions. We must wait for the
536 * CHG assertion before reading the status byte.
537 * Once the status byte has been read, the line is deasserted.
538 */
539 ret = mxt_wait_for_completion(data, &data->bl_completion,
540 MXT_FW_CHG_TIMEOUT);
541 if (ret) {
542 /*
543 * TODO: handle -ERESTARTSYS better by terminating
544 * fw update process before returning to userspace
545 * by writing length 0x000 to device (iff we are in
546 * WAITING_FRAME_DATA state).
547 */
548 dev_err(dev, "Update wait error %d\n", ret);
549 return ret;
550 }
551 }
552
553 ret = mxt_bootloader_read(data, &val, 1);
554 if (ret)
555 return ret;
556
557 if (state == MXT_WAITING_BOOTLOAD_CMD)
558 val = mxt_get_bootloader_version(data, val);
559
560 switch (state) {
561 case MXT_WAITING_BOOTLOAD_CMD:
562 case MXT_WAITING_FRAME_DATA:
563 case MXT_APP_CRC_FAIL:
564 val &= ~MXT_BOOT_STATUS_MASK;
565 break;
566 case MXT_FRAME_CRC_PASS:
567 if (val == MXT_FRAME_CRC_CHECK) {
568 goto recheck;
569 } else if (val == MXT_FRAME_CRC_FAIL) {
570 dev_err(dev, "Bootloader CRC fail\n");
571 return -EINVAL;
572 }
573 break;
574 default:
575 return -EINVAL;
576 }
577
578 if (val != state) {
579 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
580 val, state);
581 return -EINVAL;
582 }
583
584 return 0;
585 }
586
587 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
588 {
589 int ret;
590 u8 buf[2];
591
592 if (unlock) {
593 buf[0] = MXT_UNLOCK_CMD_LSB;
594 buf[1] = MXT_UNLOCK_CMD_MSB;
595 } else {
596 buf[0] = 0x01;
597 buf[1] = 0x01;
598 }
599
600 ret = mxt_bootloader_write(data, buf, 2);
601 if (ret)
602 return ret;
603
604 return 0;
605 }
606
607 static int __mxt_read_reg(struct i2c_client *client,
608 u16 reg, u16 len, void *val)
609 {
610 struct i2c_msg xfer[2];
611 u8 buf[2];
612 int ret;
613
614 buf[0] = reg & 0xff;
615 buf[1] = (reg >> 8) & 0xff;
616
617 /* Write register */
618 xfer[0].addr = client->addr;
619 xfer[0].flags = 0;
620 xfer[0].len = 2;
621 xfer[0].buf = buf;
622
623 /* Read data */
624 xfer[1].addr = client->addr;
625 xfer[1].flags = I2C_M_RD;
626 xfer[1].len = len;
627 xfer[1].buf = val;
628
629 ret = i2c_transfer(client->adapter, xfer, 2);
630 if (ret == 2) {
631 ret = 0;
632 } else {
633 if (ret >= 0)
634 ret = -EIO;
635 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
636 __func__, ret);
637 }
638
639 return ret;
640 }
641
642 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
643 const void *val)
644 {
645 u8 *buf;
646 size_t count;
647 int ret;
648
649 count = len + 2;
650 buf = kmalloc(count, GFP_KERNEL);
651 if (!buf)
652 return -ENOMEM;
653
654 buf[0] = reg & 0xff;
655 buf[1] = (reg >> 8) & 0xff;
656 memcpy(&buf[2], val, len);
657
658 ret = i2c_master_send(client, buf, count);
659 if (ret == count) {
660 ret = 0;
661 } else {
662 if (ret >= 0)
663 ret = -EIO;
664 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
665 __func__, ret);
666 }
667
668 kfree(buf);
669 return ret;
670 }
671
672 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
673 {
674 return __mxt_write_reg(client, reg, 1, &val);
675 }
676
677 static struct mxt_object *
678 mxt_get_object(struct mxt_data *data, u8 type)
679 {
680 struct mxt_object *object;
681 int i;
682
683 for (i = 0; i < data->info.object_num; i++) {
684 object = data->object_table + i;
685 if (object->type == type)
686 return object;
687 }
688
689 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
690 return NULL;
691 }
692
693 static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
694 {
695 struct device *dev = &data->client->dev;
696 u8 status = msg[1];
697 u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
698
699 complete(&data->crc_completion);
700
701 if (crc != data->config_crc) {
702 data->config_crc = crc;
703 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
704 }
705
706 /* Detect reset */
707 if (status & MXT_T6_STATUS_RESET)
708 complete(&data->reset_completion);
709
710 /* Output debug if status has changed */
711 if (status != data->t6_status)
712 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
713 status,
714 status == 0 ? " OK" : "",
715 status & MXT_T6_STATUS_RESET ? " RESET" : "",
716 status & MXT_T6_STATUS_OFL ? " OFL" : "",
717 status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
718 status & MXT_T6_STATUS_CAL ? " CAL" : "",
719 status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
720 status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
721
722 /* Save current status */
723 data->t6_status = status;
724 }
725
726 static int mxt_write_object(struct mxt_data *data,
727 u8 type, u8 offset, u8 val)
728 {
729 struct mxt_object *object;
730 u16 reg;
731
732 object = mxt_get_object(data, type);
733 if (!object || offset >= mxt_obj_size(object))
734 return -EINVAL;
735
736 reg = object->start_address;
737 return mxt_write_reg(data->client, reg + offset, val);
738 }
739
740 static void mxt_input_button(struct mxt_data *data, u8 *message)
741 {
742 struct input_dev *input = data->input_dev;
743 const struct mxt_platform_data *pdata = data->pdata;
744 int i;
745
746 for (i = 0; i < pdata->t19_num_keys; i++) {
747 if (pdata->t19_keymap[i] == KEY_RESERVED)
748 continue;
749
750 /* Active-low switch */
751 input_report_key(input, pdata->t19_keymap[i],
752 !(message[1] & BIT(i)));
753 }
754 }
755
756 static void mxt_input_sync(struct mxt_data *data)
757 {
758 input_mt_report_pointer_emulation(data->input_dev,
759 data->pdata->t19_num_keys);
760 input_sync(data->input_dev);
761 }
762
763 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
764 {
765 struct device *dev = &data->client->dev;
766 struct input_dev *input_dev = data->input_dev;
767 int id;
768 u8 status;
769 int x;
770 int y;
771 int area;
772 int amplitude;
773
774 id = message[0] - data->T9_reportid_min;
775 status = message[1];
776 x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
777 y = (message[3] << 4) | ((message[4] & 0xf));
778
779 /* Handle 10/12 bit switching */
780 if (data->max_x < 1024)
781 x >>= 2;
782 if (data->max_y < 1024)
783 y >>= 2;
784
785 area = message[5];
786 amplitude = message[6];
787
788 dev_dbg(dev,
789 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
790 id,
791 (status & MXT_T9_DETECT) ? 'D' : '.',
792 (status & MXT_T9_PRESS) ? 'P' : '.',
793 (status & MXT_T9_RELEASE) ? 'R' : '.',
794 (status & MXT_T9_MOVE) ? 'M' : '.',
795 (status & MXT_T9_VECTOR) ? 'V' : '.',
796 (status & MXT_T9_AMP) ? 'A' : '.',
797 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
798 (status & MXT_T9_UNGRIP) ? 'U' : '.',
799 x, y, area, amplitude);
800
801 input_mt_slot(input_dev, id);
802
803 if (status & MXT_T9_DETECT) {
804 /*
805 * Multiple bits may be set if the host is slow to read
806 * the status messages, indicating all the events that
807 * have happened.
808 */
809 if (status & MXT_T9_RELEASE) {
810 input_mt_report_slot_state(input_dev,
811 MT_TOOL_FINGER, 0);
812 mxt_input_sync(data);
813 }
814
815 /* Touch active */
816 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
817 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
818 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
819 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
820 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
821 } else {
822 /* Touch no longer active, close out slot */
823 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
824 }
825
826 data->update_input = true;
827 }
828
829 static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
830 {
831 struct device *dev = &data->client->dev;
832 struct input_dev *input_dev = data->input_dev;
833 int id;
834 u8 status;
835 u8 type = 0;
836 u16 x;
837 u16 y;
838 int distance = 0;
839 int tool = 0;
840 u8 major = 0;
841 u8 pressure = 0;
842 u8 orientation = 0;
843
844 id = message[0] - data->T100_reportid_min - 2;
845
846 /* ignore SCRSTATUS events */
847 if (id < 0)
848 return;
849
850 status = message[1];
851 x = get_unaligned_le16(&message[2]);
852 y = get_unaligned_le16(&message[4]);
853
854 if (status & MXT_T100_DETECT) {
855 type = (status & MXT_T100_TYPE_MASK) >> 4;
856
857 switch (type) {
858 case MXT_T100_TYPE_HOVERING_FINGER:
859 tool = MT_TOOL_FINGER;
860 distance = MXT_DISTANCE_HOVERING;
861
862 if (data->t100_aux_vect)
863 orientation = message[data->t100_aux_vect];
864
865 break;
866
867 case MXT_T100_TYPE_FINGER:
868 case MXT_T100_TYPE_GLOVE:
869 tool = MT_TOOL_FINGER;
870 distance = MXT_DISTANCE_ACTIVE_TOUCH;
871
872 if (data->t100_aux_area)
873 major = message[data->t100_aux_area];
874
875 if (data->t100_aux_ampl)
876 pressure = message[data->t100_aux_ampl];
877
878 if (data->t100_aux_vect)
879 orientation = message[data->t100_aux_vect];
880
881 break;
882
883 case MXT_T100_TYPE_PASSIVE_STYLUS:
884 tool = MT_TOOL_PEN;
885
886 /*
887 * Passive stylus is reported with size zero so
888 * hardcode.
889 */
890 major = MXT_TOUCH_MAJOR_DEFAULT;
891
892 if (data->t100_aux_ampl)
893 pressure = message[data->t100_aux_ampl];
894
895 break;
896
897 case MXT_T100_TYPE_LARGE_TOUCH:
898 /* Ignore suppressed touch */
899 break;
900
901 default:
902 dev_dbg(dev, "Unexpected T100 type\n");
903 return;
904 }
905 }
906
907 /*
908 * Values reported should be non-zero if tool is touching the
909 * device
910 */
911 if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
912 pressure = MXT_PRESSURE_DEFAULT;
913
914 input_mt_slot(input_dev, id);
915
916 if (status & MXT_T100_DETECT) {
917 dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
918 id, type, x, y, major, pressure, orientation);
919
920 input_mt_report_slot_state(input_dev, tool, 1);
921 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
922 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
923 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
924 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
925 input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
926 input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
927 } else {
928 dev_dbg(dev, "[%u] release\n", id);
929
930 /* close out slot */
931 input_mt_report_slot_state(input_dev, 0, 0);
932 }
933
934 data->update_input = true;
935 }
936
937 static int mxt_proc_message(struct mxt_data *data, u8 *message)
938 {
939 u8 report_id = message[0];
940
941 if (report_id == MXT_RPTID_NOMSG)
942 return 0;
943
944 if (report_id == data->T6_reportid) {
945 mxt_proc_t6_messages(data, message);
946 } else if (!data->input_dev) {
947 /*
948 * Do not report events if input device
949 * is not yet registered.
950 */
951 mxt_dump_message(data, message);
952 } else if (report_id >= data->T9_reportid_min &&
953 report_id <= data->T9_reportid_max) {
954 mxt_proc_t9_message(data, message);
955 } else if (report_id >= data->T100_reportid_min &&
956 report_id <= data->T100_reportid_max) {
957 mxt_proc_t100_message(data, message);
958 } else if (report_id == data->T19_reportid) {
959 mxt_input_button(data, message);
960 data->update_input = true;
961 } else {
962 mxt_dump_message(data, message);
963 }
964
965 return 1;
966 }
967
968 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
969 {
970 struct device *dev = &data->client->dev;
971 int ret;
972 int i;
973 u8 num_valid = 0;
974
975 /* Safety check for msg_buf */
976 if (count > data->max_reportid)
977 return -EINVAL;
978
979 /* Process remaining messages if necessary */
980 ret = __mxt_read_reg(data->client, data->T5_address,
981 data->T5_msg_size * count, data->msg_buf);
982 if (ret) {
983 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
984 return ret;
985 }
986
987 for (i = 0; i < count; i++) {
988 ret = mxt_proc_message(data,
989 data->msg_buf + data->T5_msg_size * i);
990
991 if (ret == 1)
992 num_valid++;
993 }
994
995 /* return number of messages read */
996 return num_valid;
997 }
998
999 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
1000 {
1001 struct device *dev = &data->client->dev;
1002 int ret;
1003 u8 count, num_left;
1004
1005 /* Read T44 and T5 together */
1006 ret = __mxt_read_reg(data->client, data->T44_address,
1007 data->T5_msg_size + 1, data->msg_buf);
1008 if (ret) {
1009 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
1010 return IRQ_NONE;
1011 }
1012
1013 count = data->msg_buf[0];
1014
1015 /*
1016 * This condition may be caused by the CHG line being configured in
1017 * Mode 0. It results in unnecessary I2C operations but it is benign.
1018 */
1019 if (count == 0)
1020 return IRQ_NONE;
1021
1022 if (count > data->max_reportid) {
1023 dev_warn(dev, "T44 count %d exceeded max report id\n", count);
1024 count = data->max_reportid;
1025 }
1026
1027 /* Process first message */
1028 ret = mxt_proc_message(data, data->msg_buf + 1);
1029 if (ret < 0) {
1030 dev_warn(dev, "Unexpected invalid message\n");
1031 return IRQ_NONE;
1032 }
1033
1034 num_left = count - 1;
1035
1036 /* Process remaining messages if necessary */
1037 if (num_left) {
1038 ret = mxt_read_and_process_messages(data, num_left);
1039 if (ret < 0)
1040 goto end;
1041 else if (ret != num_left)
1042 dev_warn(dev, "Unexpected invalid message\n");
1043 }
1044
1045 end:
1046 if (data->update_input) {
1047 mxt_input_sync(data);
1048 data->update_input = false;
1049 }
1050
1051 return IRQ_HANDLED;
1052 }
1053
1054 static int mxt_process_messages_until_invalid(struct mxt_data *data)
1055 {
1056 struct device *dev = &data->client->dev;
1057 int count, read;
1058 u8 tries = 2;
1059
1060 count = data->max_reportid;
1061
1062 /* Read messages until we force an invalid */
1063 do {
1064 read = mxt_read_and_process_messages(data, count);
1065 if (read < count)
1066 return 0;
1067 } while (--tries);
1068
1069 if (data->update_input) {
1070 mxt_input_sync(data);
1071 data->update_input = false;
1072 }
1073
1074 dev_err(dev, "CHG pin isn't cleared\n");
1075 return -EBUSY;
1076 }
1077
1078 static irqreturn_t mxt_process_messages(struct mxt_data *data)
1079 {
1080 int total_handled, num_handled;
1081 u8 count = data->last_message_count;
1082
1083 if (count < 1 || count > data->max_reportid)
1084 count = 1;
1085
1086 /* include final invalid message */
1087 total_handled = mxt_read_and_process_messages(data, count + 1);
1088 if (total_handled < 0)
1089 return IRQ_NONE;
1090 /* if there were invalid messages, then we are done */
1091 else if (total_handled <= count)
1092 goto update_count;
1093
1094 /* keep reading two msgs until one is invalid or reportid limit */
1095 do {
1096 num_handled = mxt_read_and_process_messages(data, 2);
1097 if (num_handled < 0)
1098 return IRQ_NONE;
1099
1100 total_handled += num_handled;
1101
1102 if (num_handled < 2)
1103 break;
1104 } while (total_handled < data->num_touchids);
1105
1106 update_count:
1107 data->last_message_count = total_handled;
1108
1109 if (data->update_input) {
1110 mxt_input_sync(data);
1111 data->update_input = false;
1112 }
1113
1114 return IRQ_HANDLED;
1115 }
1116
1117 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1118 {
1119 struct mxt_data *data = dev_id;
1120
1121 if (data->in_bootloader) {
1122 /* bootloader state transition completion */
1123 complete(&data->bl_completion);
1124 return IRQ_HANDLED;
1125 }
1126
1127 if (!data->object_table)
1128 return IRQ_HANDLED;
1129
1130 if (data->T44_address) {
1131 return mxt_process_messages_t44(data);
1132 } else {
1133 return mxt_process_messages(data);
1134 }
1135 }
1136
1137 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1138 u8 value, bool wait)
1139 {
1140 u16 reg;
1141 u8 command_register;
1142 int timeout_counter = 0;
1143 int ret;
1144
1145 reg = data->T6_address + cmd_offset;
1146
1147 ret = mxt_write_reg(data->client, reg, value);
1148 if (ret)
1149 return ret;
1150
1151 if (!wait)
1152 return 0;
1153
1154 do {
1155 msleep(20);
1156 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1157 if (ret)
1158 return ret;
1159 } while (command_register != 0 && timeout_counter++ <= 100);
1160
1161 if (timeout_counter > 100) {
1162 dev_err(&data->client->dev, "Command failed!\n");
1163 return -EIO;
1164 }
1165
1166 return 0;
1167 }
1168
1169 static int mxt_acquire_irq(struct mxt_data *data)
1170 {
1171 int error;
1172
1173 enable_irq(data->irq);
1174
1175 error = mxt_process_messages_until_invalid(data);
1176 if (error)
1177 return error;
1178
1179 return 0;
1180 }
1181
1182 static int mxt_soft_reset(struct mxt_data *data)
1183 {
1184 struct device *dev = &data->client->dev;
1185 int ret = 0;
1186
1187 dev_info(dev, "Resetting device\n");
1188
1189 disable_irq(data->irq);
1190
1191 reinit_completion(&data->reset_completion);
1192
1193 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1194 if (ret)
1195 return ret;
1196
1197 /* Ignore CHG line for 100ms after reset */
1198 msleep(100);
1199
1200 mxt_acquire_irq(data);
1201
1202 ret = mxt_wait_for_completion(data, &data->reset_completion,
1203 MXT_RESET_TIMEOUT);
1204 if (ret)
1205 return ret;
1206
1207 return 0;
1208 }
1209
1210 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1211 {
1212 /*
1213 * On failure, CRC is set to 0 and config will always be
1214 * downloaded.
1215 */
1216 data->config_crc = 0;
1217 reinit_completion(&data->crc_completion);
1218
1219 mxt_t6_command(data, cmd, value, true);
1220
1221 /*
1222 * Wait for crc message. On failure, CRC is set to 0 and config will
1223 * always be downloaded.
1224 */
1225 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1226 }
1227
1228 static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1229 {
1230 static const unsigned int crcpoly = 0x80001B;
1231 u32 result;
1232 u32 data_word;
1233
1234 data_word = (secondbyte << 8) | firstbyte;
1235 result = ((*crc << 1) ^ data_word);
1236
1237 if (result & 0x1000000)
1238 result ^= crcpoly;
1239
1240 *crc = result;
1241 }
1242
1243 static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1244 {
1245 u32 crc = 0;
1246 u8 *ptr = base + start_off;
1247 u8 *last_val = base + end_off - 1;
1248
1249 if (end_off < start_off)
1250 return -EINVAL;
1251
1252 while (ptr < last_val) {
1253 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1254 ptr += 2;
1255 }
1256
1257 /* if len is odd, fill the last byte with 0 */
1258 if (ptr == last_val)
1259 mxt_calc_crc24(&crc, *ptr, 0);
1260
1261 /* Mask to 24-bit */
1262 crc &= 0x00FFFFFF;
1263
1264 return crc;
1265 }
1266
1267 static int mxt_prepare_cfg_mem(struct mxt_data *data,
1268 const struct firmware *cfg,
1269 unsigned int data_pos,
1270 unsigned int cfg_start_ofs,
1271 u8 *config_mem,
1272 size_t config_mem_size)
1273 {
1274 struct device *dev = &data->client->dev;
1275 struct mxt_object *object;
1276 unsigned int type, instance, size, byte_offset;
1277 int offset;
1278 int ret;
1279 int i;
1280 u16 reg;
1281 u8 val;
1282
1283 while (data_pos < cfg->size) {
1284 /* Read type, instance, length */
1285 ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
1286 &type, &instance, &size, &offset);
1287 if (ret == 0) {
1288 /* EOF */
1289 break;
1290 } else if (ret != 3) {
1291 dev_err(dev, "Bad format: failed to parse object\n");
1292 return -EINVAL;
1293 }
1294 data_pos += offset;
1295
1296 object = mxt_get_object(data, type);
1297 if (!object) {
1298 /* Skip object */
1299 for (i = 0; i < size; i++) {
1300 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1301 &val, &offset);
1302 if (ret != 1) {
1303 dev_err(dev, "Bad format in T%d at %d\n",
1304 type, i);
1305 return -EINVAL;
1306 }
1307 data_pos += offset;
1308 }
1309 continue;
1310 }
1311
1312 if (size > mxt_obj_size(object)) {
1313 /*
1314 * Either we are in fallback mode due to wrong
1315 * config or config from a later fw version,
1316 * or the file is corrupt or hand-edited.
1317 */
1318 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1319 size - mxt_obj_size(object), type);
1320 } else if (mxt_obj_size(object) > size) {
1321 /*
1322 * If firmware is upgraded, new bytes may be added to
1323 * end of objects. It is generally forward compatible
1324 * to zero these bytes - previous behaviour will be
1325 * retained. However this does invalidate the CRC and
1326 * will force fallback mode until the configuration is
1327 * updated. We warn here but do nothing else - the
1328 * malloc has zeroed the entire configuration.
1329 */
1330 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1331 mxt_obj_size(object) - size, type);
1332 }
1333
1334 if (instance >= mxt_obj_instances(object)) {
1335 dev_err(dev, "Object instances exceeded!\n");
1336 return -EINVAL;
1337 }
1338
1339 reg = object->start_address + mxt_obj_size(object) * instance;
1340
1341 for (i = 0; i < size; i++) {
1342 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1343 &val,
1344 &offset);
1345 if (ret != 1) {
1346 dev_err(dev, "Bad format in T%d at %d\n",
1347 type, i);
1348 return -EINVAL;
1349 }
1350 data_pos += offset;
1351
1352 if (i > mxt_obj_size(object))
1353 continue;
1354
1355 byte_offset = reg + i - cfg_start_ofs;
1356
1357 if (byte_offset >= 0 && byte_offset < config_mem_size) {
1358 *(config_mem + byte_offset) = val;
1359 } else {
1360 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1361 reg, object->type, byte_offset);
1362 return -EINVAL;
1363 }
1364 }
1365 }
1366
1367 return 0;
1368 }
1369
1370 static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
1371 u8 *config_mem, size_t config_mem_size)
1372 {
1373 unsigned int byte_offset = 0;
1374 int error;
1375
1376 /* Write configuration as blocks */
1377 while (byte_offset < config_mem_size) {
1378 unsigned int size = config_mem_size - byte_offset;
1379
1380 if (size > MXT_MAX_BLOCK_WRITE)
1381 size = MXT_MAX_BLOCK_WRITE;
1382
1383 error = __mxt_write_reg(data->client,
1384 cfg_start + byte_offset,
1385 size, config_mem + byte_offset);
1386 if (error) {
1387 dev_err(&data->client->dev,
1388 "Config write error, ret=%d\n", error);
1389 return error;
1390 }
1391
1392 byte_offset += size;
1393 }
1394
1395 return 0;
1396 }
1397
1398 static int mxt_init_t7_power_cfg(struct mxt_data *data);
1399
1400 /*
1401 * mxt_update_cfg - download configuration to chip
1402 *
1403 * Atmel Raw Config File Format
1404 *
1405 * The first four lines of the raw config file contain:
1406 * 1) Version
1407 * 2) Chip ID Information (first 7 bytes of device memory)
1408 * 3) Chip Information Block 24-bit CRC Checksum
1409 * 4) Chip Configuration 24-bit CRC Checksum
1410 *
1411 * The rest of the file consists of one line per object instance:
1412 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1413 *
1414 * <TYPE> - 2-byte object type as hex
1415 * <INSTANCE> - 2-byte object instance number as hex
1416 * <SIZE> - 2-byte object size as hex
1417 * <CONTENTS> - array of <SIZE> 1-byte hex values
1418 */
1419 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
1420 {
1421 struct device *dev = &data->client->dev;
1422 struct mxt_info cfg_info;
1423 int ret;
1424 int offset;
1425 int data_pos;
1426 int i;
1427 int cfg_start_ofs;
1428 u32 info_crc, config_crc, calculated_crc;
1429 u8 *config_mem;
1430 size_t config_mem_size;
1431
1432 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1433
1434 if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1435 dev_err(dev, "Unrecognised config file\n");
1436 return -EINVAL;
1437 }
1438
1439 data_pos = strlen(MXT_CFG_MAGIC);
1440
1441 /* Load information block and check */
1442 for (i = 0; i < sizeof(struct mxt_info); i++) {
1443 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1444 (unsigned char *)&cfg_info + i,
1445 &offset);
1446 if (ret != 1) {
1447 dev_err(dev, "Bad format\n");
1448 return -EINVAL;
1449 }
1450
1451 data_pos += offset;
1452 }
1453
1454 if (cfg_info.family_id != data->info.family_id) {
1455 dev_err(dev, "Family ID mismatch!\n");
1456 return -EINVAL;
1457 }
1458
1459 if (cfg_info.variant_id != data->info.variant_id) {
1460 dev_err(dev, "Variant ID mismatch!\n");
1461 return -EINVAL;
1462 }
1463
1464 /* Read CRCs */
1465 ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
1466 if (ret != 1) {
1467 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1468 return -EINVAL;
1469 }
1470 data_pos += offset;
1471
1472 ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
1473 if (ret != 1) {
1474 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1475 return -EINVAL;
1476 }
1477 data_pos += offset;
1478
1479 /*
1480 * The Info Block CRC is calculated over mxt_info and the object
1481 * table. If it does not match then we are trying to load the
1482 * configuration from a different chip or firmware version, so
1483 * the configuration CRC is invalid anyway.
1484 */
1485 if (info_crc == data->info_crc) {
1486 if (config_crc == 0 || data->config_crc == 0) {
1487 dev_info(dev, "CRC zero, attempting to apply config\n");
1488 } else if (config_crc == data->config_crc) {
1489 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1490 data->config_crc);
1491 return 0;
1492 } else {
1493 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1494 data->config_crc, config_crc);
1495 }
1496 } else {
1497 dev_warn(dev,
1498 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1499 data->info_crc, info_crc);
1500 }
1501
1502 /* Malloc memory to store configuration */
1503 cfg_start_ofs = MXT_OBJECT_START +
1504 data->info.object_num * sizeof(struct mxt_object) +
1505 MXT_INFO_CHECKSUM_SIZE;
1506 config_mem_size = data->mem_size - cfg_start_ofs;
1507 config_mem = kzalloc(config_mem_size, GFP_KERNEL);
1508 if (!config_mem) {
1509 dev_err(dev, "Failed to allocate memory\n");
1510 return -ENOMEM;
1511 }
1512
1513 ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
1514 config_mem, config_mem_size);
1515 if (ret)
1516 goto release_mem;
1517
1518 /* Calculate crc of the received configs (not the raw config file) */
1519 if (data->T7_address < cfg_start_ofs) {
1520 dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
1521 data->T7_address, cfg_start_ofs);
1522 ret = 0;
1523 goto release_mem;
1524 }
1525
1526 calculated_crc = mxt_calculate_crc(config_mem,
1527 data->T7_address - cfg_start_ofs,
1528 config_mem_size);
1529
1530 if (config_crc > 0 && config_crc != calculated_crc)
1531 dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
1532 calculated_crc, config_crc);
1533
1534 ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
1535 config_mem, config_mem_size);
1536 if (ret)
1537 goto release_mem;
1538
1539 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1540
1541 ret = mxt_soft_reset(data);
1542 if (ret)
1543 goto release_mem;
1544
1545 dev_info(dev, "Config successfully updated\n");
1546
1547 /* T7 config may have changed */
1548 mxt_init_t7_power_cfg(data);
1549
1550 release_mem:
1551 kfree(config_mem);
1552 return ret;
1553 }
1554
1555 static int mxt_get_info(struct mxt_data *data)
1556 {
1557 struct i2c_client *client = data->client;
1558 struct mxt_info *info = &data->info;
1559 int error;
1560
1561 /* Read 7-byte info block starting at address 0 */
1562 error = __mxt_read_reg(client, 0, sizeof(*info), info);
1563 if (error)
1564 return error;
1565
1566 return 0;
1567 }
1568
1569 static void mxt_free_input_device(struct mxt_data *data)
1570 {
1571 if (data->input_dev) {
1572 input_unregister_device(data->input_dev);
1573 data->input_dev = NULL;
1574 }
1575 }
1576
1577 static void mxt_free_object_table(struct mxt_data *data)
1578 {
1579 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
1580 video_unregister_device(&data->dbg.vdev);
1581 v4l2_device_unregister(&data->dbg.v4l2);
1582 #endif
1583
1584 kfree(data->object_table);
1585 data->object_table = NULL;
1586 kfree(data->msg_buf);
1587 data->msg_buf = NULL;
1588 data->T5_address = 0;
1589 data->T5_msg_size = 0;
1590 data->T6_reportid = 0;
1591 data->T7_address = 0;
1592 data->T9_reportid_min = 0;
1593 data->T9_reportid_max = 0;
1594 data->T19_reportid = 0;
1595 data->T44_address = 0;
1596 data->T100_reportid_min = 0;
1597 data->T100_reportid_max = 0;
1598 data->max_reportid = 0;
1599 }
1600
1601 static int mxt_get_object_table(struct mxt_data *data)
1602 {
1603 struct i2c_client *client = data->client;
1604 size_t table_size;
1605 struct mxt_object *object_table;
1606 int error;
1607 int i;
1608 u8 reportid;
1609 u16 end_address;
1610
1611 table_size = data->info.object_num * sizeof(struct mxt_object);
1612 object_table = kzalloc(table_size, GFP_KERNEL);
1613 if (!object_table) {
1614 dev_err(&data->client->dev, "Failed to allocate memory\n");
1615 return -ENOMEM;
1616 }
1617
1618 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
1619 object_table);
1620 if (error) {
1621 kfree(object_table);
1622 return error;
1623 }
1624
1625 /* Valid Report IDs start counting from 1 */
1626 reportid = 1;
1627 data->mem_size = 0;
1628 for (i = 0; i < data->info.object_num; i++) {
1629 struct mxt_object *object = object_table + i;
1630 u8 min_id, max_id;
1631
1632 le16_to_cpus(&object->start_address);
1633
1634 if (object->num_report_ids) {
1635 min_id = reportid;
1636 reportid += object->num_report_ids *
1637 mxt_obj_instances(object);
1638 max_id = reportid - 1;
1639 } else {
1640 min_id = 0;
1641 max_id = 0;
1642 }
1643
1644 dev_dbg(&data->client->dev,
1645 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1646 object->type, object->start_address,
1647 mxt_obj_size(object), mxt_obj_instances(object),
1648 min_id, max_id);
1649
1650 switch (object->type) {
1651 case MXT_GEN_MESSAGE_T5:
1652 if (data->info.family_id == 0x80 &&
1653 data->info.version < 0x20) {
1654 /*
1655 * On mXT224 firmware versions prior to V2.0
1656 * read and discard unused CRC byte otherwise
1657 * DMA reads are misaligned.
1658 */
1659 data->T5_msg_size = mxt_obj_size(object);
1660 } else {
1661 /* CRC not enabled, so skip last byte */
1662 data->T5_msg_size = mxt_obj_size(object) - 1;
1663 }
1664 data->T5_address = object->start_address;
1665 break;
1666 case MXT_GEN_COMMAND_T6:
1667 data->T6_reportid = min_id;
1668 data->T6_address = object->start_address;
1669 break;
1670 case MXT_GEN_POWER_T7:
1671 data->T7_address = object->start_address;
1672 break;
1673 case MXT_TOUCH_MULTI_T9:
1674 data->multitouch = MXT_TOUCH_MULTI_T9;
1675 data->T9_reportid_min = min_id;
1676 data->T9_reportid_max = max_id;
1677 data->num_touchids = object->num_report_ids
1678 * mxt_obj_instances(object);
1679 break;
1680 case MXT_SPT_MESSAGECOUNT_T44:
1681 data->T44_address = object->start_address;
1682 break;
1683 case MXT_SPT_GPIOPWM_T19:
1684 data->T19_reportid = min_id;
1685 break;
1686 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1687 data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1688 data->T100_reportid_min = min_id;
1689 data->T100_reportid_max = max_id;
1690 /* first two report IDs reserved */
1691 data->num_touchids = object->num_report_ids - 2;
1692 break;
1693 }
1694
1695 end_address = object->start_address
1696 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1697
1698 if (end_address >= data->mem_size)
1699 data->mem_size = end_address + 1;
1700 }
1701
1702 /* Store maximum reportid */
1703 data->max_reportid = reportid;
1704
1705 /* If T44 exists, T5 position has to be directly after */
1706 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1707 dev_err(&client->dev, "Invalid T44 position\n");
1708 error = -EINVAL;
1709 goto free_object_table;
1710 }
1711
1712 data->msg_buf = kcalloc(data->max_reportid,
1713 data->T5_msg_size, GFP_KERNEL);
1714 if (!data->msg_buf) {
1715 dev_err(&client->dev, "Failed to allocate message buffer\n");
1716 error = -ENOMEM;
1717 goto free_object_table;
1718 }
1719
1720 data->object_table = object_table;
1721
1722 return 0;
1723
1724 free_object_table:
1725 mxt_free_object_table(data);
1726 return error;
1727 }
1728
1729 static int mxt_read_t9_resolution(struct mxt_data *data)
1730 {
1731 struct i2c_client *client = data->client;
1732 int error;
1733 struct t9_range range;
1734 unsigned char orient;
1735 struct mxt_object *object;
1736
1737 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1738 if (!object)
1739 return -EINVAL;
1740
1741 error = __mxt_read_reg(client,
1742 object->start_address + MXT_T9_XSIZE,
1743 sizeof(data->xsize), &data->xsize);
1744 if (error)
1745 return error;
1746
1747 error = __mxt_read_reg(client,
1748 object->start_address + MXT_T9_YSIZE,
1749 sizeof(data->ysize), &data->ysize);
1750 if (error)
1751 return error;
1752
1753 error = __mxt_read_reg(client,
1754 object->start_address + MXT_T9_RANGE,
1755 sizeof(range), &range);
1756 if (error)
1757 return error;
1758
1759 data->max_x = get_unaligned_le16(&range.x);
1760 data->max_y = get_unaligned_le16(&range.y);
1761
1762 error = __mxt_read_reg(client,
1763 object->start_address + MXT_T9_ORIENT,
1764 1, &orient);
1765 if (error)
1766 return error;
1767
1768 data->xy_switch = orient & MXT_T9_ORIENT_SWITCH;
1769 data->invertx = orient & MXT_T9_ORIENT_INVERTX;
1770 data->inverty = orient & MXT_T9_ORIENT_INVERTY;
1771
1772 return 0;
1773 }
1774
1775 static int mxt_read_t100_config(struct mxt_data *data)
1776 {
1777 struct i2c_client *client = data->client;
1778 int error;
1779 struct mxt_object *object;
1780 u16 range_x, range_y;
1781 u8 cfg, tchaux;
1782 u8 aux;
1783
1784 object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1785 if (!object)
1786 return -EINVAL;
1787
1788 /* read touchscreen dimensions */
1789 error = __mxt_read_reg(client,
1790 object->start_address + MXT_T100_XRANGE,
1791 sizeof(range_x), &range_x);
1792 if (error)
1793 return error;
1794
1795 data->max_x = get_unaligned_le16(&range_x);
1796
1797 error = __mxt_read_reg(client,
1798 object->start_address + MXT_T100_YRANGE,
1799 sizeof(range_y), &range_y);
1800 if (error)
1801 return error;
1802
1803 data->max_y = get_unaligned_le16(&range_y);
1804
1805 error = __mxt_read_reg(client,
1806 object->start_address + MXT_T100_XSIZE,
1807 sizeof(data->xsize), &data->xsize);
1808 if (error)
1809 return error;
1810
1811 error = __mxt_read_reg(client,
1812 object->start_address + MXT_T100_YSIZE,
1813 sizeof(data->ysize), &data->ysize);
1814 if (error)
1815 return error;
1816
1817 /* read orientation config */
1818 error = __mxt_read_reg(client,
1819 object->start_address + MXT_T100_CFG1,
1820 1, &cfg);
1821 if (error)
1822 return error;
1823
1824 data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY;
1825 data->invertx = cfg & MXT_T100_CFG_INVERTX;
1826 data->inverty = cfg & MXT_T100_CFG_INVERTY;
1827
1828 /* allocate aux bytes */
1829 error = __mxt_read_reg(client,
1830 object->start_address + MXT_T100_TCHAUX,
1831 1, &tchaux);
1832 if (error)
1833 return error;
1834
1835 aux = 6;
1836
1837 if (tchaux & MXT_T100_TCHAUX_VECT)
1838 data->t100_aux_vect = aux++;
1839
1840 if (tchaux & MXT_T100_TCHAUX_AMPL)
1841 data->t100_aux_ampl = aux++;
1842
1843 if (tchaux & MXT_T100_TCHAUX_AREA)
1844 data->t100_aux_area = aux++;
1845
1846 dev_dbg(&client->dev,
1847 "T100 aux mappings vect:%u ampl:%u area:%u\n",
1848 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
1849
1850 return 0;
1851 }
1852
1853 static int mxt_input_open(struct input_dev *dev);
1854 static void mxt_input_close(struct input_dev *dev);
1855
1856 static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
1857 struct mxt_data *data)
1858 {
1859 const struct mxt_platform_data *pdata = data->pdata;
1860 int i;
1861
1862 input_dev->name = "Atmel maXTouch Touchpad";
1863
1864 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1865
1866 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1867 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1868 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1869 MXT_PIXELS_PER_MM);
1870 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1871 MXT_PIXELS_PER_MM);
1872
1873 for (i = 0; i < pdata->t19_num_keys; i++)
1874 if (pdata->t19_keymap[i] != KEY_RESERVED)
1875 input_set_capability(input_dev, EV_KEY,
1876 pdata->t19_keymap[i]);
1877 }
1878
1879 static int mxt_initialize_input_device(struct mxt_data *data)
1880 {
1881 const struct mxt_platform_data *pdata = data->pdata;
1882 struct device *dev = &data->client->dev;
1883 struct input_dev *input_dev;
1884 int error;
1885 unsigned int num_mt_slots;
1886 unsigned int mt_flags = 0;
1887
1888 switch (data->multitouch) {
1889 case MXT_TOUCH_MULTI_T9:
1890 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1891 error = mxt_read_t9_resolution(data);
1892 if (error)
1893 dev_warn(dev, "Failed to initialize T9 resolution\n");
1894 break;
1895
1896 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1897 num_mt_slots = data->num_touchids;
1898 error = mxt_read_t100_config(data);
1899 if (error)
1900 dev_warn(dev, "Failed to read T100 config\n");
1901 break;
1902
1903 default:
1904 dev_err(dev, "Invalid multitouch object\n");
1905 return -EINVAL;
1906 }
1907
1908 /* Handle default values and orientation switch */
1909 if (data->max_x == 0)
1910 data->max_x = 1023;
1911
1912 if (data->max_y == 0)
1913 data->max_y = 1023;
1914
1915 if (data->xy_switch)
1916 swap(data->max_x, data->max_y);
1917
1918 dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1919
1920 /* Register input device */
1921 input_dev = input_allocate_device();
1922 if (!input_dev) {
1923 dev_err(dev, "Failed to allocate memory\n");
1924 return -ENOMEM;
1925 }
1926
1927 input_dev->name = "Atmel maXTouch Touchscreen";
1928 input_dev->phys = data->phys;
1929 input_dev->id.bustype = BUS_I2C;
1930 input_dev->dev.parent = dev;
1931 input_dev->open = mxt_input_open;
1932 input_dev->close = mxt_input_close;
1933
1934 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
1935
1936 /* For single touch */
1937 input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
1938 input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
1939
1940 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1941 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1942 data->t100_aux_ampl)) {
1943 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
1944 }
1945
1946 /* If device has buttons we assume it is a touchpad */
1947 if (pdata->t19_num_keys) {
1948 mxt_set_up_as_touchpad(input_dev, data);
1949 mt_flags |= INPUT_MT_POINTER;
1950 } else {
1951 mt_flags |= INPUT_MT_DIRECT;
1952 }
1953
1954 /* For multi touch */
1955 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1956 if (error) {
1957 dev_err(dev, "Error %d initialising slots\n", error);
1958 goto err_free_mem;
1959 }
1960
1961 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
1962 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
1963 0, MT_TOOL_MAX, 0, 0);
1964 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
1965 MXT_DISTANCE_ACTIVE_TOUCH,
1966 MXT_DISTANCE_HOVERING,
1967 0, 0);
1968 }
1969
1970 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1971 0, data->max_x, 0, 0);
1972 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1973 0, data->max_y, 0, 0);
1974
1975 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1976 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1977 data->t100_aux_area)) {
1978 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1979 0, MXT_MAX_AREA, 0, 0);
1980 }
1981
1982 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1983 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1984 data->t100_aux_ampl)) {
1985 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1986 0, 255, 0, 0);
1987 }
1988
1989 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1990 data->t100_aux_vect) {
1991 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1992 0, 255, 0, 0);
1993 }
1994
1995 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1996 data->t100_aux_ampl) {
1997 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1998 0, 255, 0, 0);
1999 }
2000
2001 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2002 data->t100_aux_vect) {
2003 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
2004 0, 255, 0, 0);
2005 }
2006
2007 input_set_drvdata(input_dev, data);
2008
2009 error = input_register_device(input_dev);
2010 if (error) {
2011 dev_err(dev, "Error %d registering input device\n", error);
2012 goto err_free_mem;
2013 }
2014
2015 data->input_dev = input_dev;
2016
2017 return 0;
2018
2019 err_free_mem:
2020 input_free_device(input_dev);
2021 return error;
2022 }
2023
2024 static int mxt_configure_objects(struct mxt_data *data,
2025 const struct firmware *cfg);
2026
2027 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
2028 {
2029 mxt_configure_objects(ctx, cfg);
2030 release_firmware(cfg);
2031 }
2032
2033 static int mxt_initialize(struct mxt_data *data)
2034 {
2035 struct i2c_client *client = data->client;
2036 int recovery_attempts = 0;
2037 int error;
2038
2039 while (1) {
2040 error = mxt_get_info(data);
2041 if (!error)
2042 break;
2043
2044 /* Check bootloader state */
2045 error = mxt_probe_bootloader(data, false);
2046 if (error) {
2047 dev_info(&client->dev, "Trying alternate bootloader address\n");
2048 error = mxt_probe_bootloader(data, true);
2049 if (error) {
2050 /* Chip is not in appmode or bootloader mode */
2051 return error;
2052 }
2053 }
2054
2055 /* OK, we are in bootloader, see if we can recover */
2056 if (++recovery_attempts > 1) {
2057 dev_err(&client->dev, "Could not recover from bootloader mode\n");
2058 /*
2059 * We can reflash from this state, so do not
2060 * abort initialization.
2061 */
2062 data->in_bootloader = true;
2063 return 0;
2064 }
2065
2066 /* Attempt to exit bootloader into app mode */
2067 mxt_send_bootloader_cmd(data, false);
2068 msleep(MXT_FW_RESET_TIME);
2069 }
2070
2071 /* Get object table information */
2072 error = mxt_get_object_table(data);
2073 if (error) {
2074 dev_err(&client->dev, "Error %d reading object table\n", error);
2075 return error;
2076 }
2077
2078 error = mxt_acquire_irq(data);
2079 if (error)
2080 goto err_free_object_table;
2081
2082 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
2083 &client->dev, GFP_KERNEL, data,
2084 mxt_config_cb);
2085 if (error) {
2086 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
2087 error);
2088 goto err_free_object_table;
2089 }
2090
2091 return 0;
2092
2093 err_free_object_table:
2094 mxt_free_object_table(data);
2095 return error;
2096 }
2097
2098 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2099 {
2100 struct device *dev = &data->client->dev;
2101 int error;
2102 struct t7_config *new_config;
2103 struct t7_config deepsleep = { .active = 0, .idle = 0 };
2104
2105 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2106 new_config = &deepsleep;
2107 else
2108 new_config = &data->t7_cfg;
2109
2110 error = __mxt_write_reg(data->client, data->T7_address,
2111 sizeof(data->t7_cfg), new_config);
2112 if (error)
2113 return error;
2114
2115 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2116 new_config->active, new_config->idle);
2117
2118 return 0;
2119 }
2120
2121 static int mxt_init_t7_power_cfg(struct mxt_data *data)
2122 {
2123 struct device *dev = &data->client->dev;
2124 int error;
2125 bool retry = false;
2126
2127 recheck:
2128 error = __mxt_read_reg(data->client, data->T7_address,
2129 sizeof(data->t7_cfg), &data->t7_cfg);
2130 if (error)
2131 return error;
2132
2133 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2134 if (!retry) {
2135 dev_dbg(dev, "T7 cfg zero, resetting\n");
2136 mxt_soft_reset(data);
2137 retry = true;
2138 goto recheck;
2139 } else {
2140 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2141 data->t7_cfg.active = 20;
2142 data->t7_cfg.idle = 100;
2143 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2144 }
2145 }
2146
2147 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2148 data->t7_cfg.active, data->t7_cfg.idle);
2149 return 0;
2150 }
2151
2152 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
2153 static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
2154 unsigned int y)
2155 {
2156 struct mxt_info *info = &data->info;
2157 struct mxt_dbg *dbg = &data->dbg;
2158 unsigned int ofs, page;
2159 unsigned int col = 0;
2160 unsigned int col_width;
2161
2162 if (info->family_id == MXT_FAMILY_1386) {
2163 col_width = info->matrix_ysize / MXT1386_COLUMNS;
2164 col = y / col_width;
2165 y = y % col_width;
2166 } else {
2167 col_width = info->matrix_ysize;
2168 }
2169
2170 ofs = (y + (x * col_width)) * sizeof(u16);
2171 page = ofs / MXT_DIAGNOSTIC_SIZE;
2172 ofs %= MXT_DIAGNOSTIC_SIZE;
2173
2174 if (info->family_id == MXT_FAMILY_1386)
2175 page += col * MXT1386_PAGES_PER_COLUMN;
2176
2177 return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
2178 }
2179
2180 static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf)
2181 {
2182 struct mxt_dbg *dbg = &data->dbg;
2183 unsigned int x = 0;
2184 unsigned int y = 0;
2185 unsigned int i, rx, ry;
2186
2187 for (i = 0; i < dbg->t37_nodes; i++) {
2188 /* Handle orientation */
2189 rx = data->xy_switch ? y : x;
2190 ry = data->xy_switch ? x : y;
2191 rx = data->invertx ? (data->xsize - 1 - rx) : rx;
2192 ry = data->inverty ? (data->ysize - 1 - ry) : ry;
2193
2194 outbuf[i] = mxt_get_debug_value(data, rx, ry);
2195
2196 /* Next value */
2197 if (++x >= (data->xy_switch ? data->ysize : data->xsize)) {
2198 x = 0;
2199 y++;
2200 }
2201 }
2202
2203 return 0;
2204 }
2205
2206 static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode,
2207 u16 *outbuf)
2208 {
2209 struct mxt_dbg *dbg = &data->dbg;
2210 int retries = 0;
2211 int page;
2212 int ret;
2213 u8 cmd = mode;
2214 struct t37_debug *p;
2215 u8 cmd_poll;
2216
2217 for (page = 0; page < dbg->t37_pages; page++) {
2218 p = dbg->t37_buf + page;
2219
2220 ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
2221 cmd);
2222 if (ret)
2223 return ret;
2224
2225 retries = 0;
2226 msleep(20);
2227 wait_cmd:
2228 /* Read back command byte */
2229 ret = __mxt_read_reg(data->client, dbg->diag_cmd_address,
2230 sizeof(cmd_poll), &cmd_poll);
2231 if (ret)
2232 return ret;
2233
2234 /* Field is cleared once the command has been processed */
2235 if (cmd_poll) {
2236 if (retries++ > 100)
2237 return -EINVAL;
2238
2239 msleep(20);
2240 goto wait_cmd;
2241 }
2242
2243 /* Read T37 page */
2244 ret = __mxt_read_reg(data->client, dbg->t37_address,
2245 sizeof(struct t37_debug), p);
2246 if (ret)
2247 return ret;
2248
2249 if (p->mode != mode || p->page != page) {
2250 dev_err(&data->client->dev, "T37 page mismatch\n");
2251 return -EINVAL;
2252 }
2253
2254 dev_dbg(&data->client->dev, "%s page:%d retries:%d\n",
2255 __func__, page, retries);
2256
2257 /* For remaining pages, write PAGEUP rather than mode */
2258 cmd = MXT_DIAGNOSTIC_PAGEUP;
2259 }
2260
2261 return mxt_convert_debug_pages(data, outbuf);
2262 }
2263
2264 static int mxt_queue_setup(struct vb2_queue *q,
2265 unsigned int *nbuffers, unsigned int *nplanes,
2266 unsigned int sizes[], struct device *alloc_devs[])
2267 {
2268 struct mxt_data *data = q->drv_priv;
2269 size_t size = data->dbg.t37_nodes * sizeof(u16);
2270
2271 if (*nplanes)
2272 return sizes[0] < size ? -EINVAL : 0;
2273
2274 *nplanes = 1;
2275 sizes[0] = size;
2276
2277 return 0;
2278 }
2279
2280 static void mxt_buffer_queue(struct vb2_buffer *vb)
2281 {
2282 struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue);
2283 u16 *ptr;
2284 int ret;
2285 u8 mode;
2286
2287 ptr = vb2_plane_vaddr(vb, 0);
2288 if (!ptr) {
2289 dev_err(&data->client->dev, "Error acquiring frame ptr\n");
2290 goto fault;
2291 }
2292
2293 switch (data->dbg.input) {
2294 case MXT_V4L_INPUT_DELTAS:
2295 default:
2296 mode = MXT_DIAGNOSTIC_DELTAS;
2297 break;
2298
2299 case MXT_V4L_INPUT_REFS:
2300 mode = MXT_DIAGNOSTIC_REFS;
2301 break;
2302 }
2303
2304 ret = mxt_read_diagnostic_debug(data, mode, ptr);
2305 if (ret)
2306 goto fault;
2307
2308 vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16));
2309 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
2310 return;
2311
2312 fault:
2313 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
2314 }
2315
2316 /* V4L2 structures */
2317 static const struct vb2_ops mxt_queue_ops = {
2318 .queue_setup = mxt_queue_setup,
2319 .buf_queue = mxt_buffer_queue,
2320 .wait_prepare = vb2_ops_wait_prepare,
2321 .wait_finish = vb2_ops_wait_finish,
2322 };
2323
2324 static const struct vb2_queue mxt_queue = {
2325 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2326 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
2327 .buf_struct_size = sizeof(struct mxt_vb2_buffer),
2328 .ops = &mxt_queue_ops,
2329 .mem_ops = &vb2_vmalloc_memops,
2330 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
2331 .min_buffers_needed = 1,
2332 };
2333
2334 static int mxt_vidioc_querycap(struct file *file, void *priv,
2335 struct v4l2_capability *cap)
2336 {
2337 struct mxt_data *data = video_drvdata(file);
2338
2339 strlcpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver));
2340 strlcpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card));
2341 snprintf(cap->bus_info, sizeof(cap->bus_info),
2342 "I2C:%s", dev_name(&data->client->dev));
2343 return 0;
2344 }
2345
2346 static int mxt_vidioc_enum_input(struct file *file, void *priv,
2347 struct v4l2_input *i)
2348 {
2349 if (i->index >= MXT_V4L_INPUT_MAX)
2350 return -EINVAL;
2351
2352 i->type = V4L2_INPUT_TYPE_TOUCH;
2353
2354 switch (i->index) {
2355 case MXT_V4L_INPUT_REFS:
2356 strlcpy(i->name, "Mutual Capacitance References",
2357 sizeof(i->name));
2358 break;
2359 case MXT_V4L_INPUT_DELTAS:
2360 strlcpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name));
2361 break;
2362 }
2363
2364 return 0;
2365 }
2366
2367 static int mxt_set_input(struct mxt_data *data, unsigned int i)
2368 {
2369 struct v4l2_pix_format *f = &data->dbg.format;
2370
2371 if (i >= MXT_V4L_INPUT_MAX)
2372 return -EINVAL;
2373
2374 if (i == MXT_V4L_INPUT_DELTAS)
2375 f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2376 else
2377 f->pixelformat = V4L2_TCH_FMT_TU16;
2378
2379 f->width = data->xy_switch ? data->ysize : data->xsize;
2380 f->height = data->xy_switch ? data->xsize : data->ysize;
2381 f->field = V4L2_FIELD_NONE;
2382 f->colorspace = V4L2_COLORSPACE_RAW;
2383 f->bytesperline = f->width * sizeof(u16);
2384 f->sizeimage = f->width * f->height * sizeof(u16);
2385
2386 data->dbg.input = i;
2387
2388 return 0;
2389 }
2390
2391 static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i)
2392 {
2393 return mxt_set_input(video_drvdata(file), i);
2394 }
2395
2396 static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
2397 {
2398 struct mxt_data *data = video_drvdata(file);
2399
2400 *i = data->dbg.input;
2401
2402 return 0;
2403 }
2404
2405 static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f)
2406 {
2407 struct mxt_data *data = video_drvdata(file);
2408
2409 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2410 f->fmt.pix = data->dbg.format;
2411
2412 return 0;
2413 }
2414
2415 static int mxt_vidioc_enum_fmt(struct file *file, void *priv,
2416 struct v4l2_fmtdesc *fmt)
2417 {
2418 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2419 return -EINVAL;
2420
2421 switch (fmt->index) {
2422 case 0:
2423 fmt->pixelformat = V4L2_TCH_FMT_TU16;
2424 break;
2425
2426 case 1:
2427 fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2428 break;
2429
2430 default:
2431 return -EINVAL;
2432 }
2433
2434 return 0;
2435 }
2436
2437 static int mxt_vidioc_g_parm(struct file *file, void *fh,
2438 struct v4l2_streamparm *a)
2439 {
2440 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2441 return -EINVAL;
2442
2443 a->parm.capture.readbuffers = 1;
2444 a->parm.capture.timeperframe.numerator = 1;
2445 a->parm.capture.timeperframe.denominator = 10;
2446 return 0;
2447 }
2448
2449 static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = {
2450 .vidioc_querycap = mxt_vidioc_querycap,
2451
2452 .vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt,
2453 .vidioc_s_fmt_vid_cap = mxt_vidioc_fmt,
2454 .vidioc_g_fmt_vid_cap = mxt_vidioc_fmt,
2455 .vidioc_try_fmt_vid_cap = mxt_vidioc_fmt,
2456 .vidioc_g_parm = mxt_vidioc_g_parm,
2457
2458 .vidioc_enum_input = mxt_vidioc_enum_input,
2459 .vidioc_g_input = mxt_vidioc_g_input,
2460 .vidioc_s_input = mxt_vidioc_s_input,
2461
2462 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2463 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2464 .vidioc_querybuf = vb2_ioctl_querybuf,
2465 .vidioc_qbuf = vb2_ioctl_qbuf,
2466 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2467 .vidioc_expbuf = vb2_ioctl_expbuf,
2468
2469 .vidioc_streamon = vb2_ioctl_streamon,
2470 .vidioc_streamoff = vb2_ioctl_streamoff,
2471 };
2472
2473 static const struct video_device mxt_video_device = {
2474 .name = "Atmel maxTouch",
2475 .fops = &mxt_video_fops,
2476 .ioctl_ops = &mxt_video_ioctl_ops,
2477 .release = video_device_release_empty,
2478 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
2479 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
2480 };
2481
2482 static void mxt_debug_init(struct mxt_data *data)
2483 {
2484 struct mxt_info *info = &data->info;
2485 struct mxt_dbg *dbg = &data->dbg;
2486 struct mxt_object *object;
2487 int error;
2488
2489 object = mxt_get_object(data, MXT_GEN_COMMAND_T6);
2490 if (!object)
2491 goto error;
2492
2493 dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC;
2494
2495 object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37);
2496 if (!object)
2497 goto error;
2498
2499 if (mxt_obj_size(object) != sizeof(struct t37_debug)) {
2500 dev_warn(&data->client->dev, "Bad T37 size");
2501 goto error;
2502 }
2503
2504 dbg->t37_address = object->start_address;
2505
2506 /* Calculate size of data and allocate buffer */
2507 dbg->t37_nodes = data->xsize * data->ysize;
2508
2509 if (info->family_id == MXT_FAMILY_1386)
2510 dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN;
2511 else
2512 dbg->t37_pages = DIV_ROUND_UP(data->xsize *
2513 info->matrix_ysize *
2514 sizeof(u16),
2515 sizeof(dbg->t37_buf->data));
2516
2517 dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
2518 sizeof(struct t37_debug), GFP_KERNEL);
2519 if (!dbg->t37_buf)
2520 goto error;
2521
2522 /* init channel to zero */
2523 mxt_set_input(data, 0);
2524
2525 /* register video device */
2526 snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s", "atmel_mxt_ts");
2527 error = v4l2_device_register(&data->client->dev, &dbg->v4l2);
2528 if (error)
2529 goto error;
2530
2531 /* initialize the queue */
2532 mutex_init(&dbg->lock);
2533 dbg->queue = mxt_queue;
2534 dbg->queue.drv_priv = data;
2535 dbg->queue.lock = &dbg->lock;
2536 dbg->queue.dev = &data->client->dev;
2537
2538 error = vb2_queue_init(&dbg->queue);
2539 if (error)
2540 goto error_unreg_v4l2;
2541
2542 dbg->vdev = mxt_video_device;
2543 dbg->vdev.v4l2_dev = &dbg->v4l2;
2544 dbg->vdev.lock = &dbg->lock;
2545 dbg->vdev.vfl_dir = VFL_DIR_RX;
2546 dbg->vdev.queue = &dbg->queue;
2547 video_set_drvdata(&dbg->vdev, data);
2548
2549 error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1);
2550 if (error)
2551 goto error_unreg_v4l2;
2552
2553 return;
2554
2555 error_unreg_v4l2:
2556 v4l2_device_unregister(&dbg->v4l2);
2557 error:
2558 dev_warn(&data->client->dev, "Error initializing T37\n");
2559 }
2560 #else
2561 static void mxt_debug_init(struct mxt_data *data)
2562 {
2563 }
2564 #endif
2565
2566 static int mxt_configure_objects(struct mxt_data *data,
2567 const struct firmware *cfg)
2568 {
2569 struct device *dev = &data->client->dev;
2570 struct mxt_info *info = &data->info;
2571 int error;
2572
2573 error = mxt_init_t7_power_cfg(data);
2574 if (error) {
2575 dev_err(dev, "Failed to initialize power cfg\n");
2576 return error;
2577 }
2578
2579 if (cfg) {
2580 error = mxt_update_cfg(data, cfg);
2581 if (error)
2582 dev_warn(dev, "Error %d updating config\n", error);
2583 }
2584
2585 if (data->multitouch) {
2586 error = mxt_initialize_input_device(data);
2587 if (error)
2588 return error;
2589 } else {
2590 dev_warn(dev, "No touch object detected\n");
2591 }
2592
2593 mxt_debug_init(data);
2594
2595 dev_info(dev,
2596 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
2597 info->family_id, info->variant_id, info->version >> 4,
2598 info->version & 0xf, info->build, info->object_num);
2599
2600 return 0;
2601 }
2602
2603 /* Firmware Version is returned as Major.Minor.Build */
2604 static ssize_t mxt_fw_version_show(struct device *dev,
2605 struct device_attribute *attr, char *buf)
2606 {
2607 struct mxt_data *data = dev_get_drvdata(dev);
2608 struct mxt_info *info = &data->info;
2609 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
2610 info->version >> 4, info->version & 0xf, info->build);
2611 }
2612
2613 /* Hardware Version is returned as FamilyID.VariantID */
2614 static ssize_t mxt_hw_version_show(struct device *dev,
2615 struct device_attribute *attr, char *buf)
2616 {
2617 struct mxt_data *data = dev_get_drvdata(dev);
2618 struct mxt_info *info = &data->info;
2619 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
2620 info->family_id, info->variant_id);
2621 }
2622
2623 static ssize_t mxt_show_instance(char *buf, int count,
2624 struct mxt_object *object, int instance,
2625 const u8 *val)
2626 {
2627 int i;
2628
2629 if (mxt_obj_instances(object) > 1)
2630 count += scnprintf(buf + count, PAGE_SIZE - count,
2631 "Instance %u\n", instance);
2632
2633 for (i = 0; i < mxt_obj_size(object); i++)
2634 count += scnprintf(buf + count, PAGE_SIZE - count,
2635 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
2636 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
2637
2638 return count;
2639 }
2640
2641 static ssize_t mxt_object_show(struct device *dev,
2642 struct device_attribute *attr, char *buf)
2643 {
2644 struct mxt_data *data = dev_get_drvdata(dev);
2645 struct mxt_object *object;
2646 int count = 0;
2647 int i, j;
2648 int error;
2649 u8 *obuf;
2650
2651 /* Pre-allocate buffer large enough to hold max sized object. */
2652 obuf = kmalloc(256, GFP_KERNEL);
2653 if (!obuf)
2654 return -ENOMEM;
2655
2656 error = 0;
2657 for (i = 0; i < data->info.object_num; i++) {
2658 object = data->object_table + i;
2659
2660 if (!mxt_object_readable(object->type))
2661 continue;
2662
2663 count += scnprintf(buf + count, PAGE_SIZE - count,
2664 "T%u:\n", object->type);
2665
2666 for (j = 0; j < mxt_obj_instances(object); j++) {
2667 u16 size = mxt_obj_size(object);
2668 u16 addr = object->start_address + j * size;
2669
2670 error = __mxt_read_reg(data->client, addr, size, obuf);
2671 if (error)
2672 goto done;
2673
2674 count = mxt_show_instance(buf, count, object, j, obuf);
2675 }
2676 }
2677
2678 done:
2679 kfree(obuf);
2680 return error ?: count;
2681 }
2682
2683 static int mxt_check_firmware_format(struct device *dev,
2684 const struct firmware *fw)
2685 {
2686 unsigned int pos = 0;
2687 char c;
2688
2689 while (pos < fw->size) {
2690 c = *(fw->data + pos);
2691
2692 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2693 return 0;
2694
2695 pos++;
2696 }
2697
2698 /*
2699 * To convert file try:
2700 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2701 */
2702 dev_err(dev, "Aborting: firmware file must be in binary format\n");
2703
2704 return -EINVAL;
2705 }
2706
2707 static int mxt_load_fw(struct device *dev, const char *fn)
2708 {
2709 struct mxt_data *data = dev_get_drvdata(dev);
2710 const struct firmware *fw = NULL;
2711 unsigned int frame_size;
2712 unsigned int pos = 0;
2713 unsigned int retry = 0;
2714 unsigned int frame = 0;
2715 int ret;
2716
2717 ret = request_firmware(&fw, fn, dev);
2718 if (ret) {
2719 dev_err(dev, "Unable to open firmware %s\n", fn);
2720 return ret;
2721 }
2722
2723 /* Check for incorrect enc file */
2724 ret = mxt_check_firmware_format(dev, fw);
2725 if (ret)
2726 goto release_firmware;
2727
2728 if (!data->in_bootloader) {
2729 /* Change to the bootloader mode */
2730 data->in_bootloader = true;
2731
2732 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2733 MXT_BOOT_VALUE, false);
2734 if (ret)
2735 goto release_firmware;
2736
2737 msleep(MXT_RESET_TIME);
2738
2739 /* Do not need to scan since we know family ID */
2740 ret = mxt_lookup_bootloader_address(data, 0);
2741 if (ret)
2742 goto release_firmware;
2743
2744 mxt_free_input_device(data);
2745 mxt_free_object_table(data);
2746 } else {
2747 enable_irq(data->irq);
2748 }
2749
2750 reinit_completion(&data->bl_completion);
2751
2752 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2753 if (ret) {
2754 /* Bootloader may still be unlocked from previous attempt */
2755 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2756 if (ret)
2757 goto disable_irq;
2758 } else {
2759 dev_info(dev, "Unlocking bootloader\n");
2760
2761 /* Unlock bootloader */
2762 ret = mxt_send_bootloader_cmd(data, true);
2763 if (ret)
2764 goto disable_irq;
2765 }
2766
2767 while (pos < fw->size) {
2768 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
2769 if (ret)
2770 goto disable_irq;
2771
2772 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2773
2774 /* Take account of CRC bytes */
2775 frame_size += 2;
2776
2777 /* Write one frame to device */
2778 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2779 if (ret)
2780 goto disable_irq;
2781
2782 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
2783 if (ret) {
2784 retry++;
2785
2786 /* Back off by 20ms per retry */
2787 msleep(retry * 20);
2788
2789 if (retry > 20) {
2790 dev_err(dev, "Retry count exceeded\n");
2791 goto disable_irq;
2792 }
2793 } else {
2794 retry = 0;
2795 pos += frame_size;
2796 frame++;
2797 }
2798
2799 if (frame % 50 == 0)
2800 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2801 frame, pos, fw->size);
2802 }
2803
2804 /* Wait for flash. */
2805 ret = mxt_wait_for_completion(data, &data->bl_completion,
2806 MXT_FW_RESET_TIME);
2807 if (ret)
2808 goto disable_irq;
2809
2810 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2811
2812 /*
2813 * Wait for device to reset. Some bootloader versions do not assert
2814 * the CHG line after bootloading has finished, so ignore potential
2815 * errors.
2816 */
2817 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
2818
2819 data->in_bootloader = false;
2820
2821 disable_irq:
2822 disable_irq(data->irq);
2823 release_firmware:
2824 release_firmware(fw);
2825 return ret;
2826 }
2827
2828 static ssize_t mxt_update_fw_store(struct device *dev,
2829 struct device_attribute *attr,
2830 const char *buf, size_t count)
2831 {
2832 struct mxt_data *data = dev_get_drvdata(dev);
2833 int error;
2834
2835 error = mxt_load_fw(dev, MXT_FW_NAME);
2836 if (error) {
2837 dev_err(dev, "The firmware update failed(%d)\n", error);
2838 count = error;
2839 } else {
2840 dev_info(dev, "The firmware update succeeded\n");
2841
2842 error = mxt_initialize(data);
2843 if (error)
2844 return error;
2845 }
2846
2847 return count;
2848 }
2849
2850 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2851 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
2852 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2853 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
2854
2855 static struct attribute *mxt_attrs[] = {
2856 &dev_attr_fw_version.attr,
2857 &dev_attr_hw_version.attr,
2858 &dev_attr_object.attr,
2859 &dev_attr_update_fw.attr,
2860 NULL
2861 };
2862
2863 static const struct attribute_group mxt_attr_group = {
2864 .attrs = mxt_attrs,
2865 };
2866
2867 static void mxt_start(struct mxt_data *data)
2868 {
2869 switch (data->pdata->suspend_mode) {
2870 case MXT_SUSPEND_T9_CTRL:
2871 mxt_soft_reset(data);
2872
2873 /* Touch enable */
2874 /* 0x83 = SCANEN | RPTEN | ENABLE */
2875 mxt_write_object(data,
2876 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
2877 break;
2878
2879 case MXT_SUSPEND_DEEP_SLEEP:
2880 default:
2881 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2882
2883 /* Recalibrate since chip has been in deep sleep */
2884 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
2885 break;
2886 }
2887
2888 }
2889
2890 static void mxt_stop(struct mxt_data *data)
2891 {
2892 switch (data->pdata->suspend_mode) {
2893 case MXT_SUSPEND_T9_CTRL:
2894 /* Touch disable */
2895 mxt_write_object(data,
2896 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
2897 break;
2898
2899 case MXT_SUSPEND_DEEP_SLEEP:
2900 default:
2901 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
2902 break;
2903 }
2904 }
2905
2906 static int mxt_input_open(struct input_dev *dev)
2907 {
2908 struct mxt_data *data = input_get_drvdata(dev);
2909
2910 mxt_start(data);
2911
2912 return 0;
2913 }
2914
2915 static void mxt_input_close(struct input_dev *dev)
2916 {
2917 struct mxt_data *data = input_get_drvdata(dev);
2918
2919 mxt_stop(data);
2920 }
2921
2922 #ifdef CONFIG_OF
2923 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2924 {
2925 struct mxt_platform_data *pdata;
2926 struct device_node *np = client->dev.of_node;
2927 u32 *keymap;
2928 int proplen, ret;
2929
2930 if (!np)
2931 return ERR_PTR(-ENOENT);
2932
2933 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
2934 if (!pdata)
2935 return ERR_PTR(-ENOMEM);
2936
2937 if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
2938 pdata->t19_num_keys = proplen / sizeof(u32);
2939
2940 keymap = devm_kzalloc(&client->dev,
2941 pdata->t19_num_keys * sizeof(keymap[0]),
2942 GFP_KERNEL);
2943 if (!keymap)
2944 return ERR_PTR(-ENOMEM);
2945
2946 ret = of_property_read_u32_array(np, "linux,gpio-keymap",
2947 keymap, pdata->t19_num_keys);
2948 if (ret)
2949 dev_warn(&client->dev,
2950 "Couldn't read linux,gpio-keymap: %d\n", ret);
2951
2952 pdata->t19_keymap = keymap;
2953 }
2954
2955 pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
2956
2957 return pdata;
2958 }
2959 #else
2960 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2961 {
2962 return ERR_PTR(-ENOENT);
2963 }
2964 #endif
2965
2966 #ifdef CONFIG_ACPI
2967
2968 struct mxt_acpi_platform_data {
2969 const char *hid;
2970 struct mxt_platform_data pdata;
2971 };
2972
2973 static unsigned int samus_touchpad_buttons[] = {
2974 KEY_RESERVED,
2975 KEY_RESERVED,
2976 KEY_RESERVED,
2977 BTN_LEFT
2978 };
2979
2980 static struct mxt_acpi_platform_data samus_platform_data[] = {
2981 {
2982 /* Touchpad */
2983 .hid = "ATML0000",
2984 .pdata = {
2985 .t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons),
2986 .t19_keymap = samus_touchpad_buttons,
2987 },
2988 },
2989 {
2990 /* Touchscreen */
2991 .hid = "ATML0001",
2992 },
2993 { }
2994 };
2995
2996 static unsigned int chromebook_tp_buttons[] = {
2997 KEY_RESERVED,
2998 KEY_RESERVED,
2999 KEY_RESERVED,
3000 KEY_RESERVED,
3001 KEY_RESERVED,
3002 BTN_LEFT
3003 };
3004
3005 static struct mxt_acpi_platform_data chromebook_platform_data[] = {
3006 {
3007 /* Touchpad */
3008 .hid = "ATML0000",
3009 .pdata = {
3010 .t19_num_keys = ARRAY_SIZE(chromebook_tp_buttons),
3011 .t19_keymap = chromebook_tp_buttons,
3012 },
3013 },
3014 {
3015 /* Touchscreen */
3016 .hid = "ATML0001",
3017 },
3018 { }
3019 };
3020
3021 static const struct dmi_system_id mxt_dmi_table[] = {
3022 {
3023 /* 2015 Google Pixel */
3024 .ident = "Chromebook Pixel 2",
3025 .matches = {
3026 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
3027 DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
3028 },
3029 .driver_data = samus_platform_data,
3030 },
3031 {
3032 /* Other Google Chromebooks */
3033 .ident = "Chromebook",
3034 .matches = {
3035 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
3036 },
3037 .driver_data = chromebook_platform_data,
3038 },
3039 { }
3040 };
3041
3042 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
3043 {
3044 struct acpi_device *adev;
3045 const struct dmi_system_id *system_id;
3046 const struct mxt_acpi_platform_data *acpi_pdata;
3047
3048 /*
3049 * Ignore ACPI devices representing bootloader mode.
3050 *
3051 * This is a bit of a hack: Google Chromebook BIOS creates ACPI
3052 * devices for both application and bootloader modes, but we are
3053 * interested in application mode only (if device is in bootloader
3054 * mode we'll end up switching into application anyway). So far
3055 * application mode addresses were all above 0x40, so we'll use it
3056 * as a threshold.
3057 */
3058 if (client->addr < 0x40)
3059 return ERR_PTR(-ENXIO);
3060
3061 adev = ACPI_COMPANION(&client->dev);
3062 if (!adev)
3063 return ERR_PTR(-ENOENT);
3064
3065 system_id = dmi_first_match(mxt_dmi_table);
3066 if (!system_id)
3067 return ERR_PTR(-ENOENT);
3068
3069 acpi_pdata = system_id->driver_data;
3070 if (!acpi_pdata)
3071 return ERR_PTR(-ENOENT);
3072
3073 while (acpi_pdata->hid) {
3074 if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid))
3075 return &acpi_pdata->pdata;
3076
3077 acpi_pdata++;
3078 }
3079
3080 return ERR_PTR(-ENOENT);
3081 }
3082 #else
3083 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
3084 {
3085 return ERR_PTR(-ENOENT);
3086 }
3087 #endif
3088
3089 static const struct mxt_platform_data *
3090 mxt_get_platform_data(struct i2c_client *client)
3091 {
3092 const struct mxt_platform_data *pdata;
3093
3094 pdata = dev_get_platdata(&client->dev);
3095 if (pdata)
3096 return pdata;
3097
3098 pdata = mxt_parse_dt(client);
3099 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
3100 return pdata;
3101
3102 pdata = mxt_parse_acpi(client);
3103 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
3104 return pdata;
3105
3106 dev_err(&client->dev, "No platform data specified\n");
3107 return ERR_PTR(-EINVAL);
3108 }
3109
3110 static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
3111 {
3112 struct mxt_data *data;
3113 const struct mxt_platform_data *pdata;
3114 int error;
3115
3116 pdata = mxt_get_platform_data(client);
3117 if (IS_ERR(pdata))
3118 return PTR_ERR(pdata);
3119
3120 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
3121 if (!data) {
3122 dev_err(&client->dev, "Failed to allocate memory\n");
3123 return -ENOMEM;
3124 }
3125
3126 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
3127 client->adapter->nr, client->addr);
3128
3129 data->client = client;
3130 data->pdata = pdata;
3131 data->irq = client->irq;
3132 i2c_set_clientdata(client, data);
3133
3134 init_completion(&data->bl_completion);
3135 init_completion(&data->reset_completion);
3136 init_completion(&data->crc_completion);
3137
3138 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
3139 pdata->irqflags | IRQF_ONESHOT,
3140 client->name, data);
3141 if (error) {
3142 dev_err(&client->dev, "Failed to register interrupt\n");
3143 goto err_free_mem;
3144 }
3145
3146 disable_irq(client->irq);
3147
3148 error = mxt_initialize(data);
3149 if (error)
3150 goto err_free_irq;
3151
3152 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
3153 if (error) {
3154 dev_err(&client->dev, "Failure %d creating sysfs group\n",
3155 error);
3156 goto err_free_object;
3157 }
3158
3159 return 0;
3160
3161 err_free_object:
3162 mxt_free_input_device(data);
3163 mxt_free_object_table(data);
3164 err_free_irq:
3165 free_irq(client->irq, data);
3166 err_free_mem:
3167 kfree(data);
3168 return error;
3169 }
3170
3171 static int mxt_remove(struct i2c_client *client)
3172 {
3173 struct mxt_data *data = i2c_get_clientdata(client);
3174
3175 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
3176 free_irq(data->irq, data);
3177 mxt_free_input_device(data);
3178 mxt_free_object_table(data);
3179 kfree(data);
3180
3181 return 0;
3182 }
3183
3184 static int __maybe_unused mxt_suspend(struct device *dev)
3185 {
3186 struct i2c_client *client = to_i2c_client(dev);
3187 struct mxt_data *data = i2c_get_clientdata(client);
3188 struct input_dev *input_dev = data->input_dev;
3189
3190 if (!input_dev)
3191 return 0;
3192
3193 mutex_lock(&input_dev->mutex);
3194
3195 if (input_dev->users)
3196 mxt_stop(data);
3197
3198 mutex_unlock(&input_dev->mutex);
3199
3200 return 0;
3201 }
3202
3203 static int __maybe_unused mxt_resume(struct device *dev)
3204 {
3205 struct i2c_client *client = to_i2c_client(dev);
3206 struct mxt_data *data = i2c_get_clientdata(client);
3207 struct input_dev *input_dev = data->input_dev;
3208
3209 if (!input_dev)
3210 return 0;
3211
3212 mutex_lock(&input_dev->mutex);
3213
3214 if (input_dev->users)
3215 mxt_start(data);
3216
3217 mutex_unlock(&input_dev->mutex);
3218
3219 return 0;
3220 }
3221
3222 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
3223
3224 static const struct of_device_id mxt_of_match[] = {
3225 { .compatible = "atmel,maxtouch", },
3226 {},
3227 };
3228 MODULE_DEVICE_TABLE(of, mxt_of_match);
3229
3230 #ifdef CONFIG_ACPI
3231 static const struct acpi_device_id mxt_acpi_id[] = {
3232 { "ATML0000", 0 }, /* Touchpad */
3233 { "ATML0001", 0 }, /* Touchscreen */
3234 { }
3235 };
3236 MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
3237 #endif
3238
3239 static const struct i2c_device_id mxt_id[] = {
3240 { "qt602240_ts", 0 },
3241 { "atmel_mxt_ts", 0 },
3242 { "atmel_mxt_tp", 0 },
3243 { "maxtouch", 0 },
3244 { "mXT224", 0 },
3245 { }
3246 };
3247 MODULE_DEVICE_TABLE(i2c, mxt_id);
3248
3249 static struct i2c_driver mxt_driver = {
3250 .driver = {
3251 .name = "atmel_mxt_ts",
3252 .of_match_table = of_match_ptr(mxt_of_match),
3253 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
3254 .pm = &mxt_pm_ops,
3255 },
3256 .probe = mxt_probe,
3257 .remove = mxt_remove,
3258 .id_table = mxt_id,
3259 };
3260
3261 module_i2c_driver(mxt_driver);
3262
3263 /* Module information */
3264 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
3265 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
3266 MODULE_LICENSE("GPL");
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