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[media] Input: atmel_mxt_ts - add diagnostic data support for mXT1386
[deliverable/linux.git] / drivers / input / touchscreen / atmel_mxt_ts.c
1 /*
2 * Atmel maXTouch Touchscreen driver
3 *
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Copyright (C) 2011-2014 Atmel Corporation
6 * Copyright (C) 2012 Google, Inc.
7 *
8 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16
17 #include <linux/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 #include <media/v4l2-device.h>
32 #include <media/v4l2-ioctl.h>
33 #include <media/videobuf2-v4l2.h>
34 #include <media/videobuf2-vmalloc.h>
35
36 /* Firmware files */
37 #define MXT_FW_NAME "maxtouch.fw"
38 #define MXT_CFG_NAME "maxtouch.cfg"
39 #define MXT_CFG_MAGIC "OBP_RAW V1"
40
41 /* Registers */
42 #define MXT_OBJECT_START 0x07
43 #define MXT_OBJECT_SIZE 6
44 #define MXT_INFO_CHECKSUM_SIZE 3
45 #define MXT_MAX_BLOCK_WRITE 256
46
47 /* Object types */
48 #define MXT_DEBUG_DIAGNOSTIC_T37 37
49 #define MXT_GEN_MESSAGE_T5 5
50 #define MXT_GEN_COMMAND_T6 6
51 #define MXT_GEN_POWER_T7 7
52 #define MXT_GEN_ACQUIRE_T8 8
53 #define MXT_GEN_DATASOURCE_T53 53
54 #define MXT_TOUCH_MULTI_T9 9
55 #define MXT_TOUCH_KEYARRAY_T15 15
56 #define MXT_TOUCH_PROXIMITY_T23 23
57 #define MXT_TOUCH_PROXKEY_T52 52
58 #define MXT_PROCI_GRIPFACE_T20 20
59 #define MXT_PROCG_NOISE_T22 22
60 #define MXT_PROCI_ONETOUCH_T24 24
61 #define MXT_PROCI_TWOTOUCH_T27 27
62 #define MXT_PROCI_GRIP_T40 40
63 #define MXT_PROCI_PALM_T41 41
64 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
65 #define MXT_PROCI_STYLUS_T47 47
66 #define MXT_PROCG_NOISESUPPRESSION_T48 48
67 #define MXT_SPT_COMMSCONFIG_T18 18
68 #define MXT_SPT_GPIOPWM_T19 19
69 #define MXT_SPT_SELFTEST_T25 25
70 #define MXT_SPT_CTECONFIG_T28 28
71 #define MXT_SPT_USERDATA_T38 38
72 #define MXT_SPT_DIGITIZER_T43 43
73 #define MXT_SPT_MESSAGECOUNT_T44 44
74 #define MXT_SPT_CTECONFIG_T46 46
75 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
76
77 /* MXT_GEN_MESSAGE_T5 object */
78 #define MXT_RPTID_NOMSG 0xff
79
80 /* MXT_GEN_COMMAND_T6 field */
81 #define MXT_COMMAND_RESET 0
82 #define MXT_COMMAND_BACKUPNV 1
83 #define MXT_COMMAND_CALIBRATE 2
84 #define MXT_COMMAND_REPORTALL 3
85 #define MXT_COMMAND_DIAGNOSTIC 5
86
87 /* Define for T6 status byte */
88 #define MXT_T6_STATUS_RESET (1 << 7)
89 #define MXT_T6_STATUS_OFL (1 << 6)
90 #define MXT_T6_STATUS_SIGERR (1 << 5)
91 #define MXT_T6_STATUS_CAL (1 << 4)
92 #define MXT_T6_STATUS_CFGERR (1 << 3)
93 #define MXT_T6_STATUS_COMSERR (1 << 2)
94
95 /* MXT_GEN_POWER_T7 field */
96 struct t7_config {
97 u8 idle;
98 u8 active;
99 } __packed;
100
101 #define MXT_POWER_CFG_RUN 0
102 #define MXT_POWER_CFG_DEEPSLEEP 1
103
104 /* MXT_TOUCH_MULTI_T9 field */
105 #define MXT_T9_CTRL 0
106 #define MXT_T9_XSIZE 3
107 #define MXT_T9_YSIZE 4
108 #define MXT_T9_ORIENT 9
109 #define MXT_T9_RANGE 18
110
111 /* MXT_TOUCH_MULTI_T9 status */
112 #define MXT_T9_UNGRIP (1 << 0)
113 #define MXT_T9_SUPPRESS (1 << 1)
114 #define MXT_T9_AMP (1 << 2)
115 #define MXT_T9_VECTOR (1 << 3)
116 #define MXT_T9_MOVE (1 << 4)
117 #define MXT_T9_RELEASE (1 << 5)
118 #define MXT_T9_PRESS (1 << 6)
119 #define MXT_T9_DETECT (1 << 7)
120
121 struct t9_range {
122 __le16 x;
123 __le16 y;
124 } __packed;
125
126 /* MXT_TOUCH_MULTI_T9 orient */
127 #define MXT_T9_ORIENT_SWITCH (1 << 0)
128 #define MXT_T9_ORIENT_INVERTX (1 << 1)
129 #define MXT_T9_ORIENT_INVERTY (1 << 2)
130
131 /* MXT_SPT_COMMSCONFIG_T18 */
132 #define MXT_COMMS_CTRL 0
133 #define MXT_COMMS_CMD 1
134
135 /* MXT_DEBUG_DIAGNOSTIC_T37 */
136 #define MXT_DIAGNOSTIC_PAGEUP 0x01
137 #define MXT_DIAGNOSTIC_DELTAS 0x10
138 #define MXT_DIAGNOSTIC_SIZE 128
139
140 #define MXT_FAMILY_1386 160
141 #define MXT1386_COLUMNS 3
142 #define MXT1386_PAGES_PER_COLUMN 8
143
144 struct t37_debug {
145 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
146 u8 mode;
147 u8 page;
148 u8 data[MXT_DIAGNOSTIC_SIZE];
149 #endif
150 };
151
152 /* Define for MXT_GEN_COMMAND_T6 */
153 #define MXT_BOOT_VALUE 0xa5
154 #define MXT_RESET_VALUE 0x01
155 #define MXT_BACKUP_VALUE 0x55
156
157 /* T100 Multiple Touch Touchscreen */
158 #define MXT_T100_CTRL 0
159 #define MXT_T100_CFG1 1
160 #define MXT_T100_TCHAUX 3
161 #define MXT_T100_XSIZE 9
162 #define MXT_T100_XRANGE 13
163 #define MXT_T100_YSIZE 20
164 #define MXT_T100_YRANGE 24
165
166 #define MXT_T100_CFG_SWITCHXY BIT(5)
167 #define MXT_T100_CFG_INVERTY BIT(6)
168 #define MXT_T100_CFG_INVERTX BIT(7)
169
170 #define MXT_T100_TCHAUX_VECT BIT(0)
171 #define MXT_T100_TCHAUX_AMPL BIT(1)
172 #define MXT_T100_TCHAUX_AREA BIT(2)
173
174 #define MXT_T100_DETECT BIT(7)
175 #define MXT_T100_TYPE_MASK 0x70
176
177 enum t100_type {
178 MXT_T100_TYPE_FINGER = 1,
179 MXT_T100_TYPE_PASSIVE_STYLUS = 2,
180 MXT_T100_TYPE_HOVERING_FINGER = 4,
181 MXT_T100_TYPE_GLOVE = 5,
182 MXT_T100_TYPE_LARGE_TOUCH = 6,
183 };
184
185 #define MXT_DISTANCE_ACTIVE_TOUCH 0
186 #define MXT_DISTANCE_HOVERING 1
187
188 #define MXT_TOUCH_MAJOR_DEFAULT 1
189 #define MXT_PRESSURE_DEFAULT 1
190
191 /* Delay times */
192 #define MXT_BACKUP_TIME 50 /* msec */
193 #define MXT_RESET_TIME 200 /* msec */
194 #define MXT_RESET_TIMEOUT 3000 /* msec */
195 #define MXT_CRC_TIMEOUT 1000 /* msec */
196 #define MXT_FW_RESET_TIME 3000 /* msec */
197 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
198
199 /* Command to unlock bootloader */
200 #define MXT_UNLOCK_CMD_MSB 0xaa
201 #define MXT_UNLOCK_CMD_LSB 0xdc
202
203 /* Bootloader mode status */
204 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
205 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
206 #define MXT_FRAME_CRC_CHECK 0x02
207 #define MXT_FRAME_CRC_FAIL 0x03
208 #define MXT_FRAME_CRC_PASS 0x04
209 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
210 #define MXT_BOOT_STATUS_MASK 0x3f
211 #define MXT_BOOT_EXTENDED_ID (1 << 5)
212 #define MXT_BOOT_ID_MASK 0x1f
213
214 /* Touchscreen absolute values */
215 #define MXT_MAX_AREA 0xff
216
217 #define MXT_PIXELS_PER_MM 20
218
219 struct mxt_info {
220 u8 family_id;
221 u8 variant_id;
222 u8 version;
223 u8 build;
224 u8 matrix_xsize;
225 u8 matrix_ysize;
226 u8 object_num;
227 };
228
229 struct mxt_object {
230 u8 type;
231 u16 start_address;
232 u8 size_minus_one;
233 u8 instances_minus_one;
234 u8 num_report_ids;
235 } __packed;
236
237 struct mxt_dbg {
238 u16 t37_address;
239 u16 diag_cmd_address;
240 struct t37_debug *t37_buf;
241 unsigned int t37_pages;
242 unsigned int t37_nodes;
243
244 struct v4l2_device v4l2;
245 struct v4l2_pix_format format;
246 struct video_device vdev;
247 struct vb2_queue queue;
248 struct mutex lock;
249 int input;
250 };
251
252 static const struct v4l2_file_operations mxt_video_fops = {
253 .owner = THIS_MODULE,
254 .open = v4l2_fh_open,
255 .release = vb2_fop_release,
256 .unlocked_ioctl = video_ioctl2,
257 .read = vb2_fop_read,
258 .mmap = vb2_fop_mmap,
259 .poll = vb2_fop_poll,
260 };
261
262 /* Each client has this additional data */
263 struct mxt_data {
264 struct i2c_client *client;
265 struct input_dev *input_dev;
266 char phys[64]; /* device physical location */
267 const struct mxt_platform_data *pdata;
268 struct mxt_object *object_table;
269 struct mxt_info info;
270 unsigned int irq;
271 unsigned int max_x;
272 unsigned int max_y;
273 bool invertx;
274 bool inverty;
275 bool xy_switch;
276 u8 xsize;
277 u8 ysize;
278 bool in_bootloader;
279 u16 mem_size;
280 u8 t100_aux_ampl;
281 u8 t100_aux_area;
282 u8 t100_aux_vect;
283 u8 max_reportid;
284 u32 config_crc;
285 u32 info_crc;
286 u8 bootloader_addr;
287 u8 *msg_buf;
288 u8 t6_status;
289 bool update_input;
290 u8 last_message_count;
291 u8 num_touchids;
292 u8 multitouch;
293 struct t7_config t7_cfg;
294 struct mxt_dbg dbg;
295
296 /* Cached parameters from object table */
297 u16 T5_address;
298 u8 T5_msg_size;
299 u8 T6_reportid;
300 u16 T6_address;
301 u16 T7_address;
302 u8 T9_reportid_min;
303 u8 T9_reportid_max;
304 u8 T19_reportid;
305 u16 T44_address;
306 u8 T100_reportid_min;
307 u8 T100_reportid_max;
308
309 /* for fw update in bootloader */
310 struct completion bl_completion;
311
312 /* for reset handling */
313 struct completion reset_completion;
314
315 /* for config update handling */
316 struct completion crc_completion;
317 };
318
319 struct mxt_vb2_buffer {
320 struct vb2_buffer vb;
321 struct list_head list;
322 };
323
324 static size_t mxt_obj_size(const struct mxt_object *obj)
325 {
326 return obj->size_minus_one + 1;
327 }
328
329 static size_t mxt_obj_instances(const struct mxt_object *obj)
330 {
331 return obj->instances_minus_one + 1;
332 }
333
334 static bool mxt_object_readable(unsigned int type)
335 {
336 switch (type) {
337 case MXT_GEN_COMMAND_T6:
338 case MXT_GEN_POWER_T7:
339 case MXT_GEN_ACQUIRE_T8:
340 case MXT_GEN_DATASOURCE_T53:
341 case MXT_TOUCH_MULTI_T9:
342 case MXT_TOUCH_KEYARRAY_T15:
343 case MXT_TOUCH_PROXIMITY_T23:
344 case MXT_TOUCH_PROXKEY_T52:
345 case MXT_PROCI_GRIPFACE_T20:
346 case MXT_PROCG_NOISE_T22:
347 case MXT_PROCI_ONETOUCH_T24:
348 case MXT_PROCI_TWOTOUCH_T27:
349 case MXT_PROCI_GRIP_T40:
350 case MXT_PROCI_PALM_T41:
351 case MXT_PROCI_TOUCHSUPPRESSION_T42:
352 case MXT_PROCI_STYLUS_T47:
353 case MXT_PROCG_NOISESUPPRESSION_T48:
354 case MXT_SPT_COMMSCONFIG_T18:
355 case MXT_SPT_GPIOPWM_T19:
356 case MXT_SPT_SELFTEST_T25:
357 case MXT_SPT_CTECONFIG_T28:
358 case MXT_SPT_USERDATA_T38:
359 case MXT_SPT_DIGITIZER_T43:
360 case MXT_SPT_CTECONFIG_T46:
361 return true;
362 default:
363 return false;
364 }
365 }
366
367 static void mxt_dump_message(struct mxt_data *data, u8 *message)
368 {
369 dev_dbg(&data->client->dev, "message: %*ph\n",
370 data->T5_msg_size, message);
371 }
372
373 static int mxt_wait_for_completion(struct mxt_data *data,
374 struct completion *comp,
375 unsigned int timeout_ms)
376 {
377 struct device *dev = &data->client->dev;
378 unsigned long timeout = msecs_to_jiffies(timeout_ms);
379 long ret;
380
381 ret = wait_for_completion_interruptible_timeout(comp, timeout);
382 if (ret < 0) {
383 return ret;
384 } else if (ret == 0) {
385 dev_err(dev, "Wait for completion timed out.\n");
386 return -ETIMEDOUT;
387 }
388 return 0;
389 }
390
391 static int mxt_bootloader_read(struct mxt_data *data,
392 u8 *val, unsigned int count)
393 {
394 int ret;
395 struct i2c_msg msg;
396
397 msg.addr = data->bootloader_addr;
398 msg.flags = data->client->flags & I2C_M_TEN;
399 msg.flags |= I2C_M_RD;
400 msg.len = count;
401 msg.buf = val;
402
403 ret = i2c_transfer(data->client->adapter, &msg, 1);
404 if (ret == 1) {
405 ret = 0;
406 } else {
407 ret = ret < 0 ? ret : -EIO;
408 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
409 __func__, ret);
410 }
411
412 return ret;
413 }
414
415 static int mxt_bootloader_write(struct mxt_data *data,
416 const u8 * const val, unsigned int count)
417 {
418 int ret;
419 struct i2c_msg msg;
420
421 msg.addr = data->bootloader_addr;
422 msg.flags = data->client->flags & I2C_M_TEN;
423 msg.len = count;
424 msg.buf = (u8 *)val;
425
426 ret = i2c_transfer(data->client->adapter, &msg, 1);
427 if (ret == 1) {
428 ret = 0;
429 } else {
430 ret = ret < 0 ? ret : -EIO;
431 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
432 __func__, ret);
433 }
434
435 return ret;
436 }
437
438 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
439 {
440 u8 appmode = data->client->addr;
441 u8 bootloader;
442
443 switch (appmode) {
444 case 0x4a:
445 case 0x4b:
446 /* Chips after 1664S use different scheme */
447 if (retry || data->info.family_id >= 0xa2) {
448 bootloader = appmode - 0x24;
449 break;
450 }
451 /* Fall through for normal case */
452 case 0x4c:
453 case 0x4d:
454 case 0x5a:
455 case 0x5b:
456 bootloader = appmode - 0x26;
457 break;
458
459 default:
460 dev_err(&data->client->dev,
461 "Appmode i2c address 0x%02x not found\n",
462 appmode);
463 return -EINVAL;
464 }
465
466 data->bootloader_addr = bootloader;
467 return 0;
468 }
469
470 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
471 {
472 struct device *dev = &data->client->dev;
473 int error;
474 u8 val;
475 bool crc_failure;
476
477 error = mxt_lookup_bootloader_address(data, alt_address);
478 if (error)
479 return error;
480
481 error = mxt_bootloader_read(data, &val, 1);
482 if (error)
483 return error;
484
485 /* Check app crc fail mode */
486 crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
487
488 dev_err(dev, "Detected bootloader, status:%02X%s\n",
489 val, crc_failure ? ", APP_CRC_FAIL" : "");
490
491 return 0;
492 }
493
494 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
495 {
496 struct device *dev = &data->client->dev;
497 u8 buf[3];
498
499 if (val & MXT_BOOT_EXTENDED_ID) {
500 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
501 dev_err(dev, "%s: i2c failure\n", __func__);
502 return val;
503 }
504
505 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
506
507 return buf[0];
508 } else {
509 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
510
511 return val;
512 }
513 }
514
515 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
516 bool wait)
517 {
518 struct device *dev = &data->client->dev;
519 u8 val;
520 int ret;
521
522 recheck:
523 if (wait) {
524 /*
525 * In application update mode, the interrupt
526 * line signals state transitions. We must wait for the
527 * CHG assertion before reading the status byte.
528 * Once the status byte has been read, the line is deasserted.
529 */
530 ret = mxt_wait_for_completion(data, &data->bl_completion,
531 MXT_FW_CHG_TIMEOUT);
532 if (ret) {
533 /*
534 * TODO: handle -ERESTARTSYS better by terminating
535 * fw update process before returning to userspace
536 * by writing length 0x000 to device (iff we are in
537 * WAITING_FRAME_DATA state).
538 */
539 dev_err(dev, "Update wait error %d\n", ret);
540 return ret;
541 }
542 }
543
544 ret = mxt_bootloader_read(data, &val, 1);
545 if (ret)
546 return ret;
547
548 if (state == MXT_WAITING_BOOTLOAD_CMD)
549 val = mxt_get_bootloader_version(data, val);
550
551 switch (state) {
552 case MXT_WAITING_BOOTLOAD_CMD:
553 case MXT_WAITING_FRAME_DATA:
554 case MXT_APP_CRC_FAIL:
555 val &= ~MXT_BOOT_STATUS_MASK;
556 break;
557 case MXT_FRAME_CRC_PASS:
558 if (val == MXT_FRAME_CRC_CHECK) {
559 goto recheck;
560 } else if (val == MXT_FRAME_CRC_FAIL) {
561 dev_err(dev, "Bootloader CRC fail\n");
562 return -EINVAL;
563 }
564 break;
565 default:
566 return -EINVAL;
567 }
568
569 if (val != state) {
570 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
571 val, state);
572 return -EINVAL;
573 }
574
575 return 0;
576 }
577
578 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
579 {
580 int ret;
581 u8 buf[2];
582
583 if (unlock) {
584 buf[0] = MXT_UNLOCK_CMD_LSB;
585 buf[1] = MXT_UNLOCK_CMD_MSB;
586 } else {
587 buf[0] = 0x01;
588 buf[1] = 0x01;
589 }
590
591 ret = mxt_bootloader_write(data, buf, 2);
592 if (ret)
593 return ret;
594
595 return 0;
596 }
597
598 static int __mxt_read_reg(struct i2c_client *client,
599 u16 reg, u16 len, void *val)
600 {
601 struct i2c_msg xfer[2];
602 u8 buf[2];
603 int ret;
604
605 buf[0] = reg & 0xff;
606 buf[1] = (reg >> 8) & 0xff;
607
608 /* Write register */
609 xfer[0].addr = client->addr;
610 xfer[0].flags = 0;
611 xfer[0].len = 2;
612 xfer[0].buf = buf;
613
614 /* Read data */
615 xfer[1].addr = client->addr;
616 xfer[1].flags = I2C_M_RD;
617 xfer[1].len = len;
618 xfer[1].buf = val;
619
620 ret = i2c_transfer(client->adapter, xfer, 2);
621 if (ret == 2) {
622 ret = 0;
623 } else {
624 if (ret >= 0)
625 ret = -EIO;
626 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
627 __func__, ret);
628 }
629
630 return ret;
631 }
632
633 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
634 const void *val)
635 {
636 u8 *buf;
637 size_t count;
638 int ret;
639
640 count = len + 2;
641 buf = kmalloc(count, GFP_KERNEL);
642 if (!buf)
643 return -ENOMEM;
644
645 buf[0] = reg & 0xff;
646 buf[1] = (reg >> 8) & 0xff;
647 memcpy(&buf[2], val, len);
648
649 ret = i2c_master_send(client, buf, count);
650 if (ret == count) {
651 ret = 0;
652 } else {
653 if (ret >= 0)
654 ret = -EIO;
655 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
656 __func__, ret);
657 }
658
659 kfree(buf);
660 return ret;
661 }
662
663 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
664 {
665 return __mxt_write_reg(client, reg, 1, &val);
666 }
667
668 static struct mxt_object *
669 mxt_get_object(struct mxt_data *data, u8 type)
670 {
671 struct mxt_object *object;
672 int i;
673
674 for (i = 0; i < data->info.object_num; i++) {
675 object = data->object_table + i;
676 if (object->type == type)
677 return object;
678 }
679
680 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
681 return NULL;
682 }
683
684 static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
685 {
686 struct device *dev = &data->client->dev;
687 u8 status = msg[1];
688 u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
689
690 complete(&data->crc_completion);
691
692 if (crc != data->config_crc) {
693 data->config_crc = crc;
694 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
695 }
696
697 /* Detect reset */
698 if (status & MXT_T6_STATUS_RESET)
699 complete(&data->reset_completion);
700
701 /* Output debug if status has changed */
702 if (status != data->t6_status)
703 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
704 status,
705 status == 0 ? " OK" : "",
706 status & MXT_T6_STATUS_RESET ? " RESET" : "",
707 status & MXT_T6_STATUS_OFL ? " OFL" : "",
708 status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
709 status & MXT_T6_STATUS_CAL ? " CAL" : "",
710 status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
711 status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
712
713 /* Save current status */
714 data->t6_status = status;
715 }
716
717 static int mxt_write_object(struct mxt_data *data,
718 u8 type, u8 offset, u8 val)
719 {
720 struct mxt_object *object;
721 u16 reg;
722
723 object = mxt_get_object(data, type);
724 if (!object || offset >= mxt_obj_size(object))
725 return -EINVAL;
726
727 reg = object->start_address;
728 return mxt_write_reg(data->client, reg + offset, val);
729 }
730
731 static void mxt_input_button(struct mxt_data *data, u8 *message)
732 {
733 struct input_dev *input = data->input_dev;
734 const struct mxt_platform_data *pdata = data->pdata;
735 int i;
736
737 for (i = 0; i < pdata->t19_num_keys; i++) {
738 if (pdata->t19_keymap[i] == KEY_RESERVED)
739 continue;
740
741 /* Active-low switch */
742 input_report_key(input, pdata->t19_keymap[i],
743 !(message[1] & BIT(i)));
744 }
745 }
746
747 static void mxt_input_sync(struct mxt_data *data)
748 {
749 input_mt_report_pointer_emulation(data->input_dev,
750 data->pdata->t19_num_keys);
751 input_sync(data->input_dev);
752 }
753
754 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
755 {
756 struct device *dev = &data->client->dev;
757 struct input_dev *input_dev = data->input_dev;
758 int id;
759 u8 status;
760 int x;
761 int y;
762 int area;
763 int amplitude;
764
765 id = message[0] - data->T9_reportid_min;
766 status = message[1];
767 x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
768 y = (message[3] << 4) | ((message[4] & 0xf));
769
770 /* Handle 10/12 bit switching */
771 if (data->max_x < 1024)
772 x >>= 2;
773 if (data->max_y < 1024)
774 y >>= 2;
775
776 area = message[5];
777 amplitude = message[6];
778
779 dev_dbg(dev,
780 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
781 id,
782 (status & MXT_T9_DETECT) ? 'D' : '.',
783 (status & MXT_T9_PRESS) ? 'P' : '.',
784 (status & MXT_T9_RELEASE) ? 'R' : '.',
785 (status & MXT_T9_MOVE) ? 'M' : '.',
786 (status & MXT_T9_VECTOR) ? 'V' : '.',
787 (status & MXT_T9_AMP) ? 'A' : '.',
788 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
789 (status & MXT_T9_UNGRIP) ? 'U' : '.',
790 x, y, area, amplitude);
791
792 input_mt_slot(input_dev, id);
793
794 if (status & MXT_T9_DETECT) {
795 /*
796 * Multiple bits may be set if the host is slow to read
797 * the status messages, indicating all the events that
798 * have happened.
799 */
800 if (status & MXT_T9_RELEASE) {
801 input_mt_report_slot_state(input_dev,
802 MT_TOOL_FINGER, 0);
803 mxt_input_sync(data);
804 }
805
806 /* Touch active */
807 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
808 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
809 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
810 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
811 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
812 } else {
813 /* Touch no longer active, close out slot */
814 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
815 }
816
817 data->update_input = true;
818 }
819
820 static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
821 {
822 struct device *dev = &data->client->dev;
823 struct input_dev *input_dev = data->input_dev;
824 int id;
825 u8 status;
826 u8 type = 0;
827 u16 x;
828 u16 y;
829 int distance = 0;
830 int tool = 0;
831 u8 major = 0;
832 u8 pressure = 0;
833 u8 orientation = 0;
834
835 id = message[0] - data->T100_reportid_min - 2;
836
837 /* ignore SCRSTATUS events */
838 if (id < 0)
839 return;
840
841 status = message[1];
842 x = get_unaligned_le16(&message[2]);
843 y = get_unaligned_le16(&message[4]);
844
845 if (status & MXT_T100_DETECT) {
846 type = (status & MXT_T100_TYPE_MASK) >> 4;
847
848 switch (type) {
849 case MXT_T100_TYPE_HOVERING_FINGER:
850 tool = MT_TOOL_FINGER;
851 distance = MXT_DISTANCE_HOVERING;
852
853 if (data->t100_aux_vect)
854 orientation = message[data->t100_aux_vect];
855
856 break;
857
858 case MXT_T100_TYPE_FINGER:
859 case MXT_T100_TYPE_GLOVE:
860 tool = MT_TOOL_FINGER;
861 distance = MXT_DISTANCE_ACTIVE_TOUCH;
862
863 if (data->t100_aux_area)
864 major = message[data->t100_aux_area];
865
866 if (data->t100_aux_ampl)
867 pressure = message[data->t100_aux_ampl];
868
869 if (data->t100_aux_vect)
870 orientation = message[data->t100_aux_vect];
871
872 break;
873
874 case MXT_T100_TYPE_PASSIVE_STYLUS:
875 tool = MT_TOOL_PEN;
876
877 /*
878 * Passive stylus is reported with size zero so
879 * hardcode.
880 */
881 major = MXT_TOUCH_MAJOR_DEFAULT;
882
883 if (data->t100_aux_ampl)
884 pressure = message[data->t100_aux_ampl];
885
886 break;
887
888 case MXT_T100_TYPE_LARGE_TOUCH:
889 /* Ignore suppressed touch */
890 break;
891
892 default:
893 dev_dbg(dev, "Unexpected T100 type\n");
894 return;
895 }
896 }
897
898 /*
899 * Values reported should be non-zero if tool is touching the
900 * device
901 */
902 if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
903 pressure = MXT_PRESSURE_DEFAULT;
904
905 input_mt_slot(input_dev, id);
906
907 if (status & MXT_T100_DETECT) {
908 dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
909 id, type, x, y, major, pressure, orientation);
910
911 input_mt_report_slot_state(input_dev, tool, 1);
912 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
913 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
914 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
915 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
916 input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
917 input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
918 } else {
919 dev_dbg(dev, "[%u] release\n", id);
920
921 /* close out slot */
922 input_mt_report_slot_state(input_dev, 0, 0);
923 }
924
925 data->update_input = true;
926 }
927
928 static int mxt_proc_message(struct mxt_data *data, u8 *message)
929 {
930 u8 report_id = message[0];
931
932 if (report_id == MXT_RPTID_NOMSG)
933 return 0;
934
935 if (report_id == data->T6_reportid) {
936 mxt_proc_t6_messages(data, message);
937 } else if (!data->input_dev) {
938 /*
939 * Do not report events if input device
940 * is not yet registered.
941 */
942 mxt_dump_message(data, message);
943 } else if (report_id >= data->T9_reportid_min &&
944 report_id <= data->T9_reportid_max) {
945 mxt_proc_t9_message(data, message);
946 } else if (report_id >= data->T100_reportid_min &&
947 report_id <= data->T100_reportid_max) {
948 mxt_proc_t100_message(data, message);
949 } else if (report_id == data->T19_reportid) {
950 mxt_input_button(data, message);
951 data->update_input = true;
952 } else {
953 mxt_dump_message(data, message);
954 }
955
956 return 1;
957 }
958
959 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
960 {
961 struct device *dev = &data->client->dev;
962 int ret;
963 int i;
964 u8 num_valid = 0;
965
966 /* Safety check for msg_buf */
967 if (count > data->max_reportid)
968 return -EINVAL;
969
970 /* Process remaining messages if necessary */
971 ret = __mxt_read_reg(data->client, data->T5_address,
972 data->T5_msg_size * count, data->msg_buf);
973 if (ret) {
974 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
975 return ret;
976 }
977
978 for (i = 0; i < count; i++) {
979 ret = mxt_proc_message(data,
980 data->msg_buf + data->T5_msg_size * i);
981
982 if (ret == 1)
983 num_valid++;
984 }
985
986 /* return number of messages read */
987 return num_valid;
988 }
989
990 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
991 {
992 struct device *dev = &data->client->dev;
993 int ret;
994 u8 count, num_left;
995
996 /* Read T44 and T5 together */
997 ret = __mxt_read_reg(data->client, data->T44_address,
998 data->T5_msg_size + 1, data->msg_buf);
999 if (ret) {
1000 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
1001 return IRQ_NONE;
1002 }
1003
1004 count = data->msg_buf[0];
1005
1006 /*
1007 * This condition may be caused by the CHG line being configured in
1008 * Mode 0. It results in unnecessary I2C operations but it is benign.
1009 */
1010 if (count == 0)
1011 return IRQ_NONE;
1012
1013 if (count > data->max_reportid) {
1014 dev_warn(dev, "T44 count %d exceeded max report id\n", count);
1015 count = data->max_reportid;
1016 }
1017
1018 /* Process first message */
1019 ret = mxt_proc_message(data, data->msg_buf + 1);
1020 if (ret < 0) {
1021 dev_warn(dev, "Unexpected invalid message\n");
1022 return IRQ_NONE;
1023 }
1024
1025 num_left = count - 1;
1026
1027 /* Process remaining messages if necessary */
1028 if (num_left) {
1029 ret = mxt_read_and_process_messages(data, num_left);
1030 if (ret < 0)
1031 goto end;
1032 else if (ret != num_left)
1033 dev_warn(dev, "Unexpected invalid message\n");
1034 }
1035
1036 end:
1037 if (data->update_input) {
1038 mxt_input_sync(data);
1039 data->update_input = false;
1040 }
1041
1042 return IRQ_HANDLED;
1043 }
1044
1045 static int mxt_process_messages_until_invalid(struct mxt_data *data)
1046 {
1047 struct device *dev = &data->client->dev;
1048 int count, read;
1049 u8 tries = 2;
1050
1051 count = data->max_reportid;
1052
1053 /* Read messages until we force an invalid */
1054 do {
1055 read = mxt_read_and_process_messages(data, count);
1056 if (read < count)
1057 return 0;
1058 } while (--tries);
1059
1060 if (data->update_input) {
1061 mxt_input_sync(data);
1062 data->update_input = false;
1063 }
1064
1065 dev_err(dev, "CHG pin isn't cleared\n");
1066 return -EBUSY;
1067 }
1068
1069 static irqreturn_t mxt_process_messages(struct mxt_data *data)
1070 {
1071 int total_handled, num_handled;
1072 u8 count = data->last_message_count;
1073
1074 if (count < 1 || count > data->max_reportid)
1075 count = 1;
1076
1077 /* include final invalid message */
1078 total_handled = mxt_read_and_process_messages(data, count + 1);
1079 if (total_handled < 0)
1080 return IRQ_NONE;
1081 /* if there were invalid messages, then we are done */
1082 else if (total_handled <= count)
1083 goto update_count;
1084
1085 /* keep reading two msgs until one is invalid or reportid limit */
1086 do {
1087 num_handled = mxt_read_and_process_messages(data, 2);
1088 if (num_handled < 0)
1089 return IRQ_NONE;
1090
1091 total_handled += num_handled;
1092
1093 if (num_handled < 2)
1094 break;
1095 } while (total_handled < data->num_touchids);
1096
1097 update_count:
1098 data->last_message_count = total_handled;
1099
1100 if (data->update_input) {
1101 mxt_input_sync(data);
1102 data->update_input = false;
1103 }
1104
1105 return IRQ_HANDLED;
1106 }
1107
1108 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1109 {
1110 struct mxt_data *data = dev_id;
1111
1112 if (data->in_bootloader) {
1113 /* bootloader state transition completion */
1114 complete(&data->bl_completion);
1115 return IRQ_HANDLED;
1116 }
1117
1118 if (!data->object_table)
1119 return IRQ_HANDLED;
1120
1121 if (data->T44_address) {
1122 return mxt_process_messages_t44(data);
1123 } else {
1124 return mxt_process_messages(data);
1125 }
1126 }
1127
1128 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1129 u8 value, bool wait)
1130 {
1131 u16 reg;
1132 u8 command_register;
1133 int timeout_counter = 0;
1134 int ret;
1135
1136 reg = data->T6_address + cmd_offset;
1137
1138 ret = mxt_write_reg(data->client, reg, value);
1139 if (ret)
1140 return ret;
1141
1142 if (!wait)
1143 return 0;
1144
1145 do {
1146 msleep(20);
1147 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1148 if (ret)
1149 return ret;
1150 } while (command_register != 0 && timeout_counter++ <= 100);
1151
1152 if (timeout_counter > 100) {
1153 dev_err(&data->client->dev, "Command failed!\n");
1154 return -EIO;
1155 }
1156
1157 return 0;
1158 }
1159
1160 static int mxt_acquire_irq(struct mxt_data *data)
1161 {
1162 int error;
1163
1164 enable_irq(data->irq);
1165
1166 error = mxt_process_messages_until_invalid(data);
1167 if (error)
1168 return error;
1169
1170 return 0;
1171 }
1172
1173 static int mxt_soft_reset(struct mxt_data *data)
1174 {
1175 struct device *dev = &data->client->dev;
1176 int ret = 0;
1177
1178 dev_info(dev, "Resetting device\n");
1179
1180 disable_irq(data->irq);
1181
1182 reinit_completion(&data->reset_completion);
1183
1184 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1185 if (ret)
1186 return ret;
1187
1188 /* Ignore CHG line for 100ms after reset */
1189 msleep(100);
1190
1191 mxt_acquire_irq(data);
1192
1193 ret = mxt_wait_for_completion(data, &data->reset_completion,
1194 MXT_RESET_TIMEOUT);
1195 if (ret)
1196 return ret;
1197
1198 return 0;
1199 }
1200
1201 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1202 {
1203 /*
1204 * On failure, CRC is set to 0 and config will always be
1205 * downloaded.
1206 */
1207 data->config_crc = 0;
1208 reinit_completion(&data->crc_completion);
1209
1210 mxt_t6_command(data, cmd, value, true);
1211
1212 /*
1213 * Wait for crc message. On failure, CRC is set to 0 and config will
1214 * always be downloaded.
1215 */
1216 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1217 }
1218
1219 static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1220 {
1221 static const unsigned int crcpoly = 0x80001B;
1222 u32 result;
1223 u32 data_word;
1224
1225 data_word = (secondbyte << 8) | firstbyte;
1226 result = ((*crc << 1) ^ data_word);
1227
1228 if (result & 0x1000000)
1229 result ^= crcpoly;
1230
1231 *crc = result;
1232 }
1233
1234 static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1235 {
1236 u32 crc = 0;
1237 u8 *ptr = base + start_off;
1238 u8 *last_val = base + end_off - 1;
1239
1240 if (end_off < start_off)
1241 return -EINVAL;
1242
1243 while (ptr < last_val) {
1244 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1245 ptr += 2;
1246 }
1247
1248 /* if len is odd, fill the last byte with 0 */
1249 if (ptr == last_val)
1250 mxt_calc_crc24(&crc, *ptr, 0);
1251
1252 /* Mask to 24-bit */
1253 crc &= 0x00FFFFFF;
1254
1255 return crc;
1256 }
1257
1258 static int mxt_prepare_cfg_mem(struct mxt_data *data,
1259 const struct firmware *cfg,
1260 unsigned int data_pos,
1261 unsigned int cfg_start_ofs,
1262 u8 *config_mem,
1263 size_t config_mem_size)
1264 {
1265 struct device *dev = &data->client->dev;
1266 struct mxt_object *object;
1267 unsigned int type, instance, size, byte_offset;
1268 int offset;
1269 int ret;
1270 int i;
1271 u16 reg;
1272 u8 val;
1273
1274 while (data_pos < cfg->size) {
1275 /* Read type, instance, length */
1276 ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
1277 &type, &instance, &size, &offset);
1278 if (ret == 0) {
1279 /* EOF */
1280 break;
1281 } else if (ret != 3) {
1282 dev_err(dev, "Bad format: failed to parse object\n");
1283 return -EINVAL;
1284 }
1285 data_pos += offset;
1286
1287 object = mxt_get_object(data, type);
1288 if (!object) {
1289 /* Skip object */
1290 for (i = 0; i < size; i++) {
1291 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1292 &val, &offset);
1293 if (ret != 1) {
1294 dev_err(dev, "Bad format in T%d at %d\n",
1295 type, i);
1296 return -EINVAL;
1297 }
1298 data_pos += offset;
1299 }
1300 continue;
1301 }
1302
1303 if (size > mxt_obj_size(object)) {
1304 /*
1305 * Either we are in fallback mode due to wrong
1306 * config or config from a later fw version,
1307 * or the file is corrupt or hand-edited.
1308 */
1309 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1310 size - mxt_obj_size(object), type);
1311 } else if (mxt_obj_size(object) > size) {
1312 /*
1313 * If firmware is upgraded, new bytes may be added to
1314 * end of objects. It is generally forward compatible
1315 * to zero these bytes - previous behaviour will be
1316 * retained. However this does invalidate the CRC and
1317 * will force fallback mode until the configuration is
1318 * updated. We warn here but do nothing else - the
1319 * malloc has zeroed the entire configuration.
1320 */
1321 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1322 mxt_obj_size(object) - size, type);
1323 }
1324
1325 if (instance >= mxt_obj_instances(object)) {
1326 dev_err(dev, "Object instances exceeded!\n");
1327 return -EINVAL;
1328 }
1329
1330 reg = object->start_address + mxt_obj_size(object) * instance;
1331
1332 for (i = 0; i < size; i++) {
1333 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1334 &val,
1335 &offset);
1336 if (ret != 1) {
1337 dev_err(dev, "Bad format in T%d at %d\n",
1338 type, i);
1339 return -EINVAL;
1340 }
1341 data_pos += offset;
1342
1343 if (i > mxt_obj_size(object))
1344 continue;
1345
1346 byte_offset = reg + i - cfg_start_ofs;
1347
1348 if (byte_offset >= 0 && byte_offset < config_mem_size) {
1349 *(config_mem + byte_offset) = val;
1350 } else {
1351 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1352 reg, object->type, byte_offset);
1353 return -EINVAL;
1354 }
1355 }
1356 }
1357
1358 return 0;
1359 }
1360
1361 static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
1362 u8 *config_mem, size_t config_mem_size)
1363 {
1364 unsigned int byte_offset = 0;
1365 int error;
1366
1367 /* Write configuration as blocks */
1368 while (byte_offset < config_mem_size) {
1369 unsigned int size = config_mem_size - byte_offset;
1370
1371 if (size > MXT_MAX_BLOCK_WRITE)
1372 size = MXT_MAX_BLOCK_WRITE;
1373
1374 error = __mxt_write_reg(data->client,
1375 cfg_start + byte_offset,
1376 size, config_mem + byte_offset);
1377 if (error) {
1378 dev_err(&data->client->dev,
1379 "Config write error, ret=%d\n", error);
1380 return error;
1381 }
1382
1383 byte_offset += size;
1384 }
1385
1386 return 0;
1387 }
1388
1389 static int mxt_init_t7_power_cfg(struct mxt_data *data);
1390
1391 /*
1392 * mxt_update_cfg - download configuration to chip
1393 *
1394 * Atmel Raw Config File Format
1395 *
1396 * The first four lines of the raw config file contain:
1397 * 1) Version
1398 * 2) Chip ID Information (first 7 bytes of device memory)
1399 * 3) Chip Information Block 24-bit CRC Checksum
1400 * 4) Chip Configuration 24-bit CRC Checksum
1401 *
1402 * The rest of the file consists of one line per object instance:
1403 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1404 *
1405 * <TYPE> - 2-byte object type as hex
1406 * <INSTANCE> - 2-byte object instance number as hex
1407 * <SIZE> - 2-byte object size as hex
1408 * <CONTENTS> - array of <SIZE> 1-byte hex values
1409 */
1410 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
1411 {
1412 struct device *dev = &data->client->dev;
1413 struct mxt_info cfg_info;
1414 int ret;
1415 int offset;
1416 int data_pos;
1417 int i;
1418 int cfg_start_ofs;
1419 u32 info_crc, config_crc, calculated_crc;
1420 u8 *config_mem;
1421 size_t config_mem_size;
1422
1423 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1424
1425 if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1426 dev_err(dev, "Unrecognised config file\n");
1427 return -EINVAL;
1428 }
1429
1430 data_pos = strlen(MXT_CFG_MAGIC);
1431
1432 /* Load information block and check */
1433 for (i = 0; i < sizeof(struct mxt_info); i++) {
1434 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1435 (unsigned char *)&cfg_info + i,
1436 &offset);
1437 if (ret != 1) {
1438 dev_err(dev, "Bad format\n");
1439 return -EINVAL;
1440 }
1441
1442 data_pos += offset;
1443 }
1444
1445 if (cfg_info.family_id != data->info.family_id) {
1446 dev_err(dev, "Family ID mismatch!\n");
1447 return -EINVAL;
1448 }
1449
1450 if (cfg_info.variant_id != data->info.variant_id) {
1451 dev_err(dev, "Variant ID mismatch!\n");
1452 return -EINVAL;
1453 }
1454
1455 /* Read CRCs */
1456 ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
1457 if (ret != 1) {
1458 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1459 return -EINVAL;
1460 }
1461 data_pos += offset;
1462
1463 ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
1464 if (ret != 1) {
1465 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1466 return -EINVAL;
1467 }
1468 data_pos += offset;
1469
1470 /*
1471 * The Info Block CRC is calculated over mxt_info and the object
1472 * table. If it does not match then we are trying to load the
1473 * configuration from a different chip or firmware version, so
1474 * the configuration CRC is invalid anyway.
1475 */
1476 if (info_crc == data->info_crc) {
1477 if (config_crc == 0 || data->config_crc == 0) {
1478 dev_info(dev, "CRC zero, attempting to apply config\n");
1479 } else if (config_crc == data->config_crc) {
1480 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1481 data->config_crc);
1482 return 0;
1483 } else {
1484 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1485 data->config_crc, config_crc);
1486 }
1487 } else {
1488 dev_warn(dev,
1489 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1490 data->info_crc, info_crc);
1491 }
1492
1493 /* Malloc memory to store configuration */
1494 cfg_start_ofs = MXT_OBJECT_START +
1495 data->info.object_num * sizeof(struct mxt_object) +
1496 MXT_INFO_CHECKSUM_SIZE;
1497 config_mem_size = data->mem_size - cfg_start_ofs;
1498 config_mem = kzalloc(config_mem_size, GFP_KERNEL);
1499 if (!config_mem) {
1500 dev_err(dev, "Failed to allocate memory\n");
1501 return -ENOMEM;
1502 }
1503
1504 ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
1505 config_mem, config_mem_size);
1506 if (ret)
1507 goto release_mem;
1508
1509 /* Calculate crc of the received configs (not the raw config file) */
1510 if (data->T7_address < cfg_start_ofs) {
1511 dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
1512 data->T7_address, cfg_start_ofs);
1513 ret = 0;
1514 goto release_mem;
1515 }
1516
1517 calculated_crc = mxt_calculate_crc(config_mem,
1518 data->T7_address - cfg_start_ofs,
1519 config_mem_size);
1520
1521 if (config_crc > 0 && config_crc != calculated_crc)
1522 dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
1523 calculated_crc, config_crc);
1524
1525 ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
1526 config_mem, config_mem_size);
1527 if (ret)
1528 goto release_mem;
1529
1530 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1531
1532 ret = mxt_soft_reset(data);
1533 if (ret)
1534 goto release_mem;
1535
1536 dev_info(dev, "Config successfully updated\n");
1537
1538 /* T7 config may have changed */
1539 mxt_init_t7_power_cfg(data);
1540
1541 release_mem:
1542 kfree(config_mem);
1543 return ret;
1544 }
1545
1546 static int mxt_get_info(struct mxt_data *data)
1547 {
1548 struct i2c_client *client = data->client;
1549 struct mxt_info *info = &data->info;
1550 int error;
1551
1552 /* Read 7-byte info block starting at address 0 */
1553 error = __mxt_read_reg(client, 0, sizeof(*info), info);
1554 if (error)
1555 return error;
1556
1557 return 0;
1558 }
1559
1560 static void mxt_free_input_device(struct mxt_data *data)
1561 {
1562 if (data->input_dev) {
1563 input_unregister_device(data->input_dev);
1564 data->input_dev = NULL;
1565 }
1566 }
1567
1568 static void mxt_free_object_table(struct mxt_data *data)
1569 {
1570 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
1571 video_unregister_device(&data->dbg.vdev);
1572 v4l2_device_unregister(&data->dbg.v4l2);
1573 #endif
1574
1575 kfree(data->object_table);
1576 data->object_table = NULL;
1577 kfree(data->msg_buf);
1578 data->msg_buf = NULL;
1579 data->T5_address = 0;
1580 data->T5_msg_size = 0;
1581 data->T6_reportid = 0;
1582 data->T7_address = 0;
1583 data->T9_reportid_min = 0;
1584 data->T9_reportid_max = 0;
1585 data->T19_reportid = 0;
1586 data->T44_address = 0;
1587 data->T100_reportid_min = 0;
1588 data->T100_reportid_max = 0;
1589 data->max_reportid = 0;
1590 }
1591
1592 static int mxt_get_object_table(struct mxt_data *data)
1593 {
1594 struct i2c_client *client = data->client;
1595 size_t table_size;
1596 struct mxt_object *object_table;
1597 int error;
1598 int i;
1599 u8 reportid;
1600 u16 end_address;
1601
1602 table_size = data->info.object_num * sizeof(struct mxt_object);
1603 object_table = kzalloc(table_size, GFP_KERNEL);
1604 if (!object_table) {
1605 dev_err(&data->client->dev, "Failed to allocate memory\n");
1606 return -ENOMEM;
1607 }
1608
1609 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
1610 object_table);
1611 if (error) {
1612 kfree(object_table);
1613 return error;
1614 }
1615
1616 /* Valid Report IDs start counting from 1 */
1617 reportid = 1;
1618 data->mem_size = 0;
1619 for (i = 0; i < data->info.object_num; i++) {
1620 struct mxt_object *object = object_table + i;
1621 u8 min_id, max_id;
1622
1623 le16_to_cpus(&object->start_address);
1624
1625 if (object->num_report_ids) {
1626 min_id = reportid;
1627 reportid += object->num_report_ids *
1628 mxt_obj_instances(object);
1629 max_id = reportid - 1;
1630 } else {
1631 min_id = 0;
1632 max_id = 0;
1633 }
1634
1635 dev_dbg(&data->client->dev,
1636 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1637 object->type, object->start_address,
1638 mxt_obj_size(object), mxt_obj_instances(object),
1639 min_id, max_id);
1640
1641 switch (object->type) {
1642 case MXT_GEN_MESSAGE_T5:
1643 if (data->info.family_id == 0x80 &&
1644 data->info.version < 0x20) {
1645 /*
1646 * On mXT224 firmware versions prior to V2.0
1647 * read and discard unused CRC byte otherwise
1648 * DMA reads are misaligned.
1649 */
1650 data->T5_msg_size = mxt_obj_size(object);
1651 } else {
1652 /* CRC not enabled, so skip last byte */
1653 data->T5_msg_size = mxt_obj_size(object) - 1;
1654 }
1655 data->T5_address = object->start_address;
1656 break;
1657 case MXT_GEN_COMMAND_T6:
1658 data->T6_reportid = min_id;
1659 data->T6_address = object->start_address;
1660 break;
1661 case MXT_GEN_POWER_T7:
1662 data->T7_address = object->start_address;
1663 break;
1664 case MXT_TOUCH_MULTI_T9:
1665 data->multitouch = MXT_TOUCH_MULTI_T9;
1666 data->T9_reportid_min = min_id;
1667 data->T9_reportid_max = max_id;
1668 data->num_touchids = object->num_report_ids
1669 * mxt_obj_instances(object);
1670 break;
1671 case MXT_SPT_MESSAGECOUNT_T44:
1672 data->T44_address = object->start_address;
1673 break;
1674 case MXT_SPT_GPIOPWM_T19:
1675 data->T19_reportid = min_id;
1676 break;
1677 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1678 data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1679 data->T100_reportid_min = min_id;
1680 data->T100_reportid_max = max_id;
1681 /* first two report IDs reserved */
1682 data->num_touchids = object->num_report_ids - 2;
1683 break;
1684 }
1685
1686 end_address = object->start_address
1687 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1688
1689 if (end_address >= data->mem_size)
1690 data->mem_size = end_address + 1;
1691 }
1692
1693 /* Store maximum reportid */
1694 data->max_reportid = reportid;
1695
1696 /* If T44 exists, T5 position has to be directly after */
1697 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1698 dev_err(&client->dev, "Invalid T44 position\n");
1699 error = -EINVAL;
1700 goto free_object_table;
1701 }
1702
1703 data->msg_buf = kcalloc(data->max_reportid,
1704 data->T5_msg_size, GFP_KERNEL);
1705 if (!data->msg_buf) {
1706 dev_err(&client->dev, "Failed to allocate message buffer\n");
1707 error = -ENOMEM;
1708 goto free_object_table;
1709 }
1710
1711 data->object_table = object_table;
1712
1713 return 0;
1714
1715 free_object_table:
1716 mxt_free_object_table(data);
1717 return error;
1718 }
1719
1720 static int mxt_read_t9_resolution(struct mxt_data *data)
1721 {
1722 struct i2c_client *client = data->client;
1723 int error;
1724 struct t9_range range;
1725 unsigned char orient;
1726 struct mxt_object *object;
1727
1728 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1729 if (!object)
1730 return -EINVAL;
1731
1732 error = __mxt_read_reg(client,
1733 object->start_address + MXT_T9_XSIZE,
1734 sizeof(data->xsize), &data->xsize);
1735 if (error)
1736 return error;
1737
1738 error = __mxt_read_reg(client,
1739 object->start_address + MXT_T9_YSIZE,
1740 sizeof(data->ysize), &data->ysize);
1741 if (error)
1742 return error;
1743
1744 error = __mxt_read_reg(client,
1745 object->start_address + MXT_T9_RANGE,
1746 sizeof(range), &range);
1747 if (error)
1748 return error;
1749
1750 data->max_x = get_unaligned_le16(&range.x);
1751 data->max_y = get_unaligned_le16(&range.y);
1752
1753 error = __mxt_read_reg(client,
1754 object->start_address + MXT_T9_ORIENT,
1755 1, &orient);
1756 if (error)
1757 return error;
1758
1759 data->xy_switch = orient & MXT_T9_ORIENT_SWITCH;
1760 data->invertx = orient & MXT_T9_ORIENT_INVERTX;
1761 data->inverty = orient & MXT_T9_ORIENT_INVERTY;
1762
1763 return 0;
1764 }
1765
1766 static int mxt_read_t100_config(struct mxt_data *data)
1767 {
1768 struct i2c_client *client = data->client;
1769 int error;
1770 struct mxt_object *object;
1771 u16 range_x, range_y;
1772 u8 cfg, tchaux;
1773 u8 aux;
1774
1775 object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1776 if (!object)
1777 return -EINVAL;
1778
1779 /* read touchscreen dimensions */
1780 error = __mxt_read_reg(client,
1781 object->start_address + MXT_T100_XRANGE,
1782 sizeof(range_x), &range_x);
1783 if (error)
1784 return error;
1785
1786 data->max_x = get_unaligned_le16(&range_x);
1787
1788 error = __mxt_read_reg(client,
1789 object->start_address + MXT_T100_YRANGE,
1790 sizeof(range_y), &range_y);
1791 if (error)
1792 return error;
1793
1794 data->max_y = get_unaligned_le16(&range_y);
1795
1796 error = __mxt_read_reg(client,
1797 object->start_address + MXT_T100_XSIZE,
1798 sizeof(data->xsize), &data->xsize);
1799 if (error)
1800 return error;
1801
1802 error = __mxt_read_reg(client,
1803 object->start_address + MXT_T100_YSIZE,
1804 sizeof(data->ysize), &data->ysize);
1805 if (error)
1806 return error;
1807
1808 /* read orientation config */
1809 error = __mxt_read_reg(client,
1810 object->start_address + MXT_T100_CFG1,
1811 1, &cfg);
1812 if (error)
1813 return error;
1814
1815 data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY;
1816 data->invertx = cfg & MXT_T100_CFG_INVERTX;
1817 data->inverty = cfg & MXT_T100_CFG_INVERTY;
1818
1819 /* allocate aux bytes */
1820 error = __mxt_read_reg(client,
1821 object->start_address + MXT_T100_TCHAUX,
1822 1, &tchaux);
1823 if (error)
1824 return error;
1825
1826 aux = 6;
1827
1828 if (tchaux & MXT_T100_TCHAUX_VECT)
1829 data->t100_aux_vect = aux++;
1830
1831 if (tchaux & MXT_T100_TCHAUX_AMPL)
1832 data->t100_aux_ampl = aux++;
1833
1834 if (tchaux & MXT_T100_TCHAUX_AREA)
1835 data->t100_aux_area = aux++;
1836
1837 dev_dbg(&client->dev,
1838 "T100 aux mappings vect:%u ampl:%u area:%u\n",
1839 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
1840
1841 return 0;
1842 }
1843
1844 static int mxt_input_open(struct input_dev *dev);
1845 static void mxt_input_close(struct input_dev *dev);
1846
1847 static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
1848 struct mxt_data *data)
1849 {
1850 const struct mxt_platform_data *pdata = data->pdata;
1851 int i;
1852
1853 input_dev->name = "Atmel maXTouch Touchpad";
1854
1855 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1856
1857 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1858 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1859 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1860 MXT_PIXELS_PER_MM);
1861 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1862 MXT_PIXELS_PER_MM);
1863
1864 for (i = 0; i < pdata->t19_num_keys; i++)
1865 if (pdata->t19_keymap[i] != KEY_RESERVED)
1866 input_set_capability(input_dev, EV_KEY,
1867 pdata->t19_keymap[i]);
1868 }
1869
1870 static int mxt_initialize_input_device(struct mxt_data *data)
1871 {
1872 const struct mxt_platform_data *pdata = data->pdata;
1873 struct device *dev = &data->client->dev;
1874 struct input_dev *input_dev;
1875 int error;
1876 unsigned int num_mt_slots;
1877 unsigned int mt_flags = 0;
1878
1879 switch (data->multitouch) {
1880 case MXT_TOUCH_MULTI_T9:
1881 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1882 error = mxt_read_t9_resolution(data);
1883 if (error)
1884 dev_warn(dev, "Failed to initialize T9 resolution\n");
1885 break;
1886
1887 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1888 num_mt_slots = data->num_touchids;
1889 error = mxt_read_t100_config(data);
1890 if (error)
1891 dev_warn(dev, "Failed to read T100 config\n");
1892 break;
1893
1894 default:
1895 dev_err(dev, "Invalid multitouch object\n");
1896 return -EINVAL;
1897 }
1898
1899 /* Handle default values and orientation switch */
1900 if (data->max_x == 0)
1901 data->max_x = 1023;
1902
1903 if (data->max_y == 0)
1904 data->max_y = 1023;
1905
1906 if (data->xy_switch)
1907 swap(data->max_x, data->max_y);
1908
1909 dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1910
1911 /* Register input device */
1912 input_dev = input_allocate_device();
1913 if (!input_dev) {
1914 dev_err(dev, "Failed to allocate memory\n");
1915 return -ENOMEM;
1916 }
1917
1918 input_dev->name = "Atmel maXTouch Touchscreen";
1919 input_dev->phys = data->phys;
1920 input_dev->id.bustype = BUS_I2C;
1921 input_dev->dev.parent = dev;
1922 input_dev->open = mxt_input_open;
1923 input_dev->close = mxt_input_close;
1924
1925 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
1926
1927 /* For single touch */
1928 input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
1929 input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
1930
1931 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1932 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1933 data->t100_aux_ampl)) {
1934 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
1935 }
1936
1937 /* If device has buttons we assume it is a touchpad */
1938 if (pdata->t19_num_keys) {
1939 mxt_set_up_as_touchpad(input_dev, data);
1940 mt_flags |= INPUT_MT_POINTER;
1941 } else {
1942 mt_flags |= INPUT_MT_DIRECT;
1943 }
1944
1945 /* For multi touch */
1946 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1947 if (error) {
1948 dev_err(dev, "Error %d initialising slots\n", error);
1949 goto err_free_mem;
1950 }
1951
1952 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
1953 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
1954 0, MT_TOOL_MAX, 0, 0);
1955 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
1956 MXT_DISTANCE_ACTIVE_TOUCH,
1957 MXT_DISTANCE_HOVERING,
1958 0, 0);
1959 }
1960
1961 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1962 0, data->max_x, 0, 0);
1963 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1964 0, data->max_y, 0, 0);
1965
1966 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1967 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1968 data->t100_aux_area)) {
1969 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1970 0, MXT_MAX_AREA, 0, 0);
1971 }
1972
1973 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1974 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1975 data->t100_aux_ampl)) {
1976 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1977 0, 255, 0, 0);
1978 }
1979
1980 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1981 data->t100_aux_vect) {
1982 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1983 0, 255, 0, 0);
1984 }
1985
1986 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1987 data->t100_aux_ampl) {
1988 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1989 0, 255, 0, 0);
1990 }
1991
1992 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1993 data->t100_aux_vect) {
1994 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1995 0, 255, 0, 0);
1996 }
1997
1998 input_set_drvdata(input_dev, data);
1999
2000 error = input_register_device(input_dev);
2001 if (error) {
2002 dev_err(dev, "Error %d registering input device\n", error);
2003 goto err_free_mem;
2004 }
2005
2006 data->input_dev = input_dev;
2007
2008 return 0;
2009
2010 err_free_mem:
2011 input_free_device(input_dev);
2012 return error;
2013 }
2014
2015 static int mxt_configure_objects(struct mxt_data *data,
2016 const struct firmware *cfg);
2017
2018 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
2019 {
2020 mxt_configure_objects(ctx, cfg);
2021 release_firmware(cfg);
2022 }
2023
2024 static int mxt_initialize(struct mxt_data *data)
2025 {
2026 struct i2c_client *client = data->client;
2027 int recovery_attempts = 0;
2028 int error;
2029
2030 while (1) {
2031 error = mxt_get_info(data);
2032 if (!error)
2033 break;
2034
2035 /* Check bootloader state */
2036 error = mxt_probe_bootloader(data, false);
2037 if (error) {
2038 dev_info(&client->dev, "Trying alternate bootloader address\n");
2039 error = mxt_probe_bootloader(data, true);
2040 if (error) {
2041 /* Chip is not in appmode or bootloader mode */
2042 return error;
2043 }
2044 }
2045
2046 /* OK, we are in bootloader, see if we can recover */
2047 if (++recovery_attempts > 1) {
2048 dev_err(&client->dev, "Could not recover from bootloader mode\n");
2049 /*
2050 * We can reflash from this state, so do not
2051 * abort initialization.
2052 */
2053 data->in_bootloader = true;
2054 return 0;
2055 }
2056
2057 /* Attempt to exit bootloader into app mode */
2058 mxt_send_bootloader_cmd(data, false);
2059 msleep(MXT_FW_RESET_TIME);
2060 }
2061
2062 /* Get object table information */
2063 error = mxt_get_object_table(data);
2064 if (error) {
2065 dev_err(&client->dev, "Error %d reading object table\n", error);
2066 return error;
2067 }
2068
2069 error = mxt_acquire_irq(data);
2070 if (error)
2071 goto err_free_object_table;
2072
2073 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
2074 &client->dev, GFP_KERNEL, data,
2075 mxt_config_cb);
2076 if (error) {
2077 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
2078 error);
2079 goto err_free_object_table;
2080 }
2081
2082 return 0;
2083
2084 err_free_object_table:
2085 mxt_free_object_table(data);
2086 return error;
2087 }
2088
2089 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2090 {
2091 struct device *dev = &data->client->dev;
2092 int error;
2093 struct t7_config *new_config;
2094 struct t7_config deepsleep = { .active = 0, .idle = 0 };
2095
2096 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2097 new_config = &deepsleep;
2098 else
2099 new_config = &data->t7_cfg;
2100
2101 error = __mxt_write_reg(data->client, data->T7_address,
2102 sizeof(data->t7_cfg), new_config);
2103 if (error)
2104 return error;
2105
2106 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2107 new_config->active, new_config->idle);
2108
2109 return 0;
2110 }
2111
2112 static int mxt_init_t7_power_cfg(struct mxt_data *data)
2113 {
2114 struct device *dev = &data->client->dev;
2115 int error;
2116 bool retry = false;
2117
2118 recheck:
2119 error = __mxt_read_reg(data->client, data->T7_address,
2120 sizeof(data->t7_cfg), &data->t7_cfg);
2121 if (error)
2122 return error;
2123
2124 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2125 if (!retry) {
2126 dev_dbg(dev, "T7 cfg zero, resetting\n");
2127 mxt_soft_reset(data);
2128 retry = true;
2129 goto recheck;
2130 } else {
2131 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2132 data->t7_cfg.active = 20;
2133 data->t7_cfg.idle = 100;
2134 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2135 }
2136 }
2137
2138 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2139 data->t7_cfg.active, data->t7_cfg.idle);
2140 return 0;
2141 }
2142
2143 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
2144 static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
2145 unsigned int y)
2146 {
2147 struct mxt_info *info = &data->info;
2148 struct mxt_dbg *dbg = &data->dbg;
2149 unsigned int ofs, page;
2150 unsigned int col = 0;
2151 unsigned int col_width;
2152
2153 if (info->family_id == MXT_FAMILY_1386) {
2154 col_width = info->matrix_ysize / MXT1386_COLUMNS;
2155 col = y / col_width;
2156 y = y % col_width;
2157 } else {
2158 col_width = info->matrix_ysize;
2159 }
2160
2161 ofs = (y + (x * col_width)) * sizeof(u16);
2162 page = ofs / MXT_DIAGNOSTIC_SIZE;
2163 ofs %= MXT_DIAGNOSTIC_SIZE;
2164
2165 if (info->family_id == MXT_FAMILY_1386)
2166 page += col * MXT1386_PAGES_PER_COLUMN;
2167
2168 return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
2169 }
2170
2171 static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf)
2172 {
2173 struct mxt_dbg *dbg = &data->dbg;
2174 unsigned int x = 0;
2175 unsigned int y = 0;
2176 unsigned int i, rx, ry;
2177
2178 for (i = 0; i < dbg->t37_nodes; i++) {
2179 /* Handle orientation */
2180 rx = data->xy_switch ? y : x;
2181 ry = data->xy_switch ? x : y;
2182 rx = data->invertx ? (data->xsize - 1 - rx) : rx;
2183 ry = data->inverty ? (data->ysize - 1 - ry) : ry;
2184
2185 outbuf[i] = mxt_get_debug_value(data, rx, ry);
2186
2187 /* Next value */
2188 if (++x >= (data->xy_switch ? data->ysize : data->xsize)) {
2189 x = 0;
2190 y++;
2191 }
2192 }
2193
2194 return 0;
2195 }
2196
2197 static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode,
2198 u16 *outbuf)
2199 {
2200 struct mxt_dbg *dbg = &data->dbg;
2201 int retries = 0;
2202 int page;
2203 int ret;
2204 u8 cmd = mode;
2205 struct t37_debug *p;
2206 u8 cmd_poll;
2207
2208 for (page = 0; page < dbg->t37_pages; page++) {
2209 p = dbg->t37_buf + page;
2210
2211 ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
2212 cmd);
2213 if (ret)
2214 return ret;
2215
2216 retries = 0;
2217 msleep(20);
2218 wait_cmd:
2219 /* Read back command byte */
2220 ret = __mxt_read_reg(data->client, dbg->diag_cmd_address,
2221 sizeof(cmd_poll), &cmd_poll);
2222 if (ret)
2223 return ret;
2224
2225 /* Field is cleared once the command has been processed */
2226 if (cmd_poll) {
2227 if (retries++ > 100)
2228 return -EINVAL;
2229
2230 msleep(20);
2231 goto wait_cmd;
2232 }
2233
2234 /* Read T37 page */
2235 ret = __mxt_read_reg(data->client, dbg->t37_address,
2236 sizeof(struct t37_debug), p);
2237 if (ret)
2238 return ret;
2239
2240 if (p->mode != mode || p->page != page) {
2241 dev_err(&data->client->dev, "T37 page mismatch\n");
2242 return -EINVAL;
2243 }
2244
2245 dev_dbg(&data->client->dev, "%s page:%d retries:%d\n",
2246 __func__, page, retries);
2247
2248 /* For remaining pages, write PAGEUP rather than mode */
2249 cmd = MXT_DIAGNOSTIC_PAGEUP;
2250 }
2251
2252 return mxt_convert_debug_pages(data, outbuf);
2253 }
2254
2255 static int mxt_queue_setup(struct vb2_queue *q,
2256 unsigned int *nbuffers, unsigned int *nplanes,
2257 unsigned int sizes[], struct device *alloc_devs[])
2258 {
2259 struct mxt_data *data = q->drv_priv;
2260 size_t size = data->dbg.t37_nodes * sizeof(u16);
2261
2262 if (*nplanes)
2263 return sizes[0] < size ? -EINVAL : 0;
2264
2265 *nplanes = 1;
2266 sizes[0] = size;
2267
2268 return 0;
2269 }
2270
2271 static void mxt_buffer_queue(struct vb2_buffer *vb)
2272 {
2273 struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue);
2274 u16 *ptr;
2275 int ret;
2276
2277 ptr = vb2_plane_vaddr(vb, 0);
2278 if (!ptr) {
2279 dev_err(&data->client->dev, "Error acquiring frame ptr\n");
2280 goto fault;
2281 }
2282
2283 ret = mxt_read_diagnostic_debug(data, MXT_DIAGNOSTIC_DELTAS, ptr);
2284 if (ret)
2285 goto fault;
2286
2287 vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16));
2288 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
2289 return;
2290
2291 fault:
2292 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
2293 }
2294
2295 /* V4L2 structures */
2296 static const struct vb2_ops mxt_queue_ops = {
2297 .queue_setup = mxt_queue_setup,
2298 .buf_queue = mxt_buffer_queue,
2299 .wait_prepare = vb2_ops_wait_prepare,
2300 .wait_finish = vb2_ops_wait_finish,
2301 };
2302
2303 static const struct vb2_queue mxt_queue = {
2304 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2305 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
2306 .buf_struct_size = sizeof(struct mxt_vb2_buffer),
2307 .ops = &mxt_queue_ops,
2308 .mem_ops = &vb2_vmalloc_memops,
2309 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
2310 .min_buffers_needed = 1,
2311 };
2312
2313 static int mxt_vidioc_querycap(struct file *file, void *priv,
2314 struct v4l2_capability *cap)
2315 {
2316 struct mxt_data *data = video_drvdata(file);
2317
2318 strlcpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver));
2319 strlcpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card));
2320 snprintf(cap->bus_info, sizeof(cap->bus_info),
2321 "I2C:%s", dev_name(&data->client->dev));
2322 return 0;
2323 }
2324
2325 static int mxt_vidioc_enum_input(struct file *file, void *priv,
2326 struct v4l2_input *i)
2327 {
2328 if (i->index > 0)
2329 return -EINVAL;
2330
2331 i->type = V4L2_INPUT_TYPE_TOUCH;
2332 strlcpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name));
2333 return 0;
2334 }
2335
2336 static int mxt_set_input(struct mxt_data *data, unsigned int i)
2337 {
2338 struct v4l2_pix_format *f = &data->dbg.format;
2339
2340 if (i > 0)
2341 return -EINVAL;
2342
2343 f->width = data->xy_switch ? data->ysize : data->xsize;
2344 f->height = data->xy_switch ? data->xsize : data->ysize;
2345 f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2346 f->field = V4L2_FIELD_NONE;
2347 f->colorspace = V4L2_COLORSPACE_RAW;
2348 f->bytesperline = f->width * sizeof(u16);
2349 f->sizeimage = f->width * f->height * sizeof(u16);
2350
2351 data->dbg.input = i;
2352
2353 return 0;
2354 }
2355
2356 static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i)
2357 {
2358 return mxt_set_input(video_drvdata(file), i);
2359 }
2360
2361 static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
2362 {
2363 struct mxt_data *data = video_drvdata(file);
2364
2365 *i = data->dbg.input;
2366
2367 return 0;
2368 }
2369
2370 static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f)
2371 {
2372 struct mxt_data *data = video_drvdata(file);
2373
2374 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2375 f->fmt.pix = data->dbg.format;
2376
2377 return 0;
2378 }
2379
2380 static int mxt_vidioc_enum_fmt(struct file *file, void *priv,
2381 struct v4l2_fmtdesc *fmt)
2382 {
2383 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2384 return -EINVAL;
2385
2386 fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2387 return 0;
2388 }
2389
2390 static int mxt_vidioc_g_parm(struct file *file, void *fh,
2391 struct v4l2_streamparm *a)
2392 {
2393 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2394 return -EINVAL;
2395
2396 a->parm.capture.readbuffers = 1;
2397 a->parm.capture.timeperframe.numerator = 1;
2398 a->parm.capture.timeperframe.denominator = 10;
2399 return 0;
2400 }
2401
2402 static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = {
2403 .vidioc_querycap = mxt_vidioc_querycap,
2404
2405 .vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt,
2406 .vidioc_s_fmt_vid_cap = mxt_vidioc_fmt,
2407 .vidioc_g_fmt_vid_cap = mxt_vidioc_fmt,
2408 .vidioc_try_fmt_vid_cap = mxt_vidioc_fmt,
2409 .vidioc_g_parm = mxt_vidioc_g_parm,
2410
2411 .vidioc_enum_input = mxt_vidioc_enum_input,
2412 .vidioc_g_input = mxt_vidioc_g_input,
2413 .vidioc_s_input = mxt_vidioc_s_input,
2414
2415 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2416 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2417 .vidioc_querybuf = vb2_ioctl_querybuf,
2418 .vidioc_qbuf = vb2_ioctl_qbuf,
2419 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2420 .vidioc_expbuf = vb2_ioctl_expbuf,
2421
2422 .vidioc_streamon = vb2_ioctl_streamon,
2423 .vidioc_streamoff = vb2_ioctl_streamoff,
2424 };
2425
2426 static const struct video_device mxt_video_device = {
2427 .name = "Atmel maxTouch",
2428 .fops = &mxt_video_fops,
2429 .ioctl_ops = &mxt_video_ioctl_ops,
2430 .release = video_device_release_empty,
2431 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
2432 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
2433 };
2434
2435 static void mxt_debug_init(struct mxt_data *data)
2436 {
2437 struct mxt_info *info = &data->info;
2438 struct mxt_dbg *dbg = &data->dbg;
2439 struct mxt_object *object;
2440 int error;
2441
2442 object = mxt_get_object(data, MXT_GEN_COMMAND_T6);
2443 if (!object)
2444 goto error;
2445
2446 dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC;
2447
2448 object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37);
2449 if (!object)
2450 goto error;
2451
2452 if (mxt_obj_size(object) != sizeof(struct t37_debug)) {
2453 dev_warn(&data->client->dev, "Bad T37 size");
2454 goto error;
2455 }
2456
2457 dbg->t37_address = object->start_address;
2458
2459 /* Calculate size of data and allocate buffer */
2460 dbg->t37_nodes = data->xsize * data->ysize;
2461
2462 if (info->family_id == MXT_FAMILY_1386)
2463 dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN;
2464 else
2465 dbg->t37_pages = DIV_ROUND_UP(data->xsize *
2466 data->info.matrix_ysize *
2467 sizeof(u16),
2468 sizeof(dbg->t37_buf->data));
2469
2470 dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
2471 sizeof(struct t37_debug), GFP_KERNEL);
2472 if (!dbg->t37_buf)
2473 goto error;
2474
2475 /* init channel to zero */
2476 mxt_set_input(data, 0);
2477
2478 /* register video device */
2479 snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s", "atmel_mxt_ts");
2480 error = v4l2_device_register(&data->client->dev, &dbg->v4l2);
2481 if (error)
2482 goto error;
2483
2484 /* initialize the queue */
2485 mutex_init(&dbg->lock);
2486 dbg->queue = mxt_queue;
2487 dbg->queue.drv_priv = data;
2488 dbg->queue.lock = &dbg->lock;
2489 dbg->queue.dev = &data->client->dev;
2490
2491 error = vb2_queue_init(&dbg->queue);
2492 if (error)
2493 goto error_unreg_v4l2;
2494
2495 dbg->vdev = mxt_video_device;
2496 dbg->vdev.v4l2_dev = &dbg->v4l2;
2497 dbg->vdev.lock = &dbg->lock;
2498 dbg->vdev.vfl_dir = VFL_DIR_RX;
2499 dbg->vdev.queue = &dbg->queue;
2500 video_set_drvdata(&dbg->vdev, data);
2501
2502 error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1);
2503 if (error)
2504 goto error_unreg_v4l2;
2505
2506 return;
2507
2508 error_unreg_v4l2:
2509 v4l2_device_unregister(&dbg->v4l2);
2510 error:
2511 dev_warn(&data->client->dev, "Error initializing T37\n");
2512 }
2513 #else
2514 static void mxt_debug_init(struct mxt_data *data)
2515 {
2516 }
2517 #endif
2518
2519 static int mxt_configure_objects(struct mxt_data *data,
2520 const struct firmware *cfg)
2521 {
2522 struct device *dev = &data->client->dev;
2523 struct mxt_info *info = &data->info;
2524 int error;
2525
2526 error = mxt_init_t7_power_cfg(data);
2527 if (error) {
2528 dev_err(dev, "Failed to initialize power cfg\n");
2529 return error;
2530 }
2531
2532 if (cfg) {
2533 error = mxt_update_cfg(data, cfg);
2534 if (error)
2535 dev_warn(dev, "Error %d updating config\n", error);
2536 }
2537
2538 if (data->multitouch) {
2539 error = mxt_initialize_input_device(data);
2540 if (error)
2541 return error;
2542 } else {
2543 dev_warn(dev, "No touch object detected\n");
2544 }
2545
2546 mxt_debug_init(data);
2547
2548 dev_info(dev,
2549 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
2550 info->family_id, info->variant_id, info->version >> 4,
2551 info->version & 0xf, info->build, info->object_num);
2552
2553 return 0;
2554 }
2555
2556 /* Firmware Version is returned as Major.Minor.Build */
2557 static ssize_t mxt_fw_version_show(struct device *dev,
2558 struct device_attribute *attr, char *buf)
2559 {
2560 struct mxt_data *data = dev_get_drvdata(dev);
2561 struct mxt_info *info = &data->info;
2562 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
2563 info->version >> 4, info->version & 0xf, info->build);
2564 }
2565
2566 /* Hardware Version is returned as FamilyID.VariantID */
2567 static ssize_t mxt_hw_version_show(struct device *dev,
2568 struct device_attribute *attr, char *buf)
2569 {
2570 struct mxt_data *data = dev_get_drvdata(dev);
2571 struct mxt_info *info = &data->info;
2572 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
2573 info->family_id, info->variant_id);
2574 }
2575
2576 static ssize_t mxt_show_instance(char *buf, int count,
2577 struct mxt_object *object, int instance,
2578 const u8 *val)
2579 {
2580 int i;
2581
2582 if (mxt_obj_instances(object) > 1)
2583 count += scnprintf(buf + count, PAGE_SIZE - count,
2584 "Instance %u\n", instance);
2585
2586 for (i = 0; i < mxt_obj_size(object); i++)
2587 count += scnprintf(buf + count, PAGE_SIZE - count,
2588 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
2589 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
2590
2591 return count;
2592 }
2593
2594 static ssize_t mxt_object_show(struct device *dev,
2595 struct device_attribute *attr, char *buf)
2596 {
2597 struct mxt_data *data = dev_get_drvdata(dev);
2598 struct mxt_object *object;
2599 int count = 0;
2600 int i, j;
2601 int error;
2602 u8 *obuf;
2603
2604 /* Pre-allocate buffer large enough to hold max sized object. */
2605 obuf = kmalloc(256, GFP_KERNEL);
2606 if (!obuf)
2607 return -ENOMEM;
2608
2609 error = 0;
2610 for (i = 0; i < data->info.object_num; i++) {
2611 object = data->object_table + i;
2612
2613 if (!mxt_object_readable(object->type))
2614 continue;
2615
2616 count += scnprintf(buf + count, PAGE_SIZE - count,
2617 "T%u:\n", object->type);
2618
2619 for (j = 0; j < mxt_obj_instances(object); j++) {
2620 u16 size = mxt_obj_size(object);
2621 u16 addr = object->start_address + j * size;
2622
2623 error = __mxt_read_reg(data->client, addr, size, obuf);
2624 if (error)
2625 goto done;
2626
2627 count = mxt_show_instance(buf, count, object, j, obuf);
2628 }
2629 }
2630
2631 done:
2632 kfree(obuf);
2633 return error ?: count;
2634 }
2635
2636 static int mxt_check_firmware_format(struct device *dev,
2637 const struct firmware *fw)
2638 {
2639 unsigned int pos = 0;
2640 char c;
2641
2642 while (pos < fw->size) {
2643 c = *(fw->data + pos);
2644
2645 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2646 return 0;
2647
2648 pos++;
2649 }
2650
2651 /*
2652 * To convert file try:
2653 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2654 */
2655 dev_err(dev, "Aborting: firmware file must be in binary format\n");
2656
2657 return -EINVAL;
2658 }
2659
2660 static int mxt_load_fw(struct device *dev, const char *fn)
2661 {
2662 struct mxt_data *data = dev_get_drvdata(dev);
2663 const struct firmware *fw = NULL;
2664 unsigned int frame_size;
2665 unsigned int pos = 0;
2666 unsigned int retry = 0;
2667 unsigned int frame = 0;
2668 int ret;
2669
2670 ret = request_firmware(&fw, fn, dev);
2671 if (ret) {
2672 dev_err(dev, "Unable to open firmware %s\n", fn);
2673 return ret;
2674 }
2675
2676 /* Check for incorrect enc file */
2677 ret = mxt_check_firmware_format(dev, fw);
2678 if (ret)
2679 goto release_firmware;
2680
2681 if (!data->in_bootloader) {
2682 /* Change to the bootloader mode */
2683 data->in_bootloader = true;
2684
2685 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2686 MXT_BOOT_VALUE, false);
2687 if (ret)
2688 goto release_firmware;
2689
2690 msleep(MXT_RESET_TIME);
2691
2692 /* Do not need to scan since we know family ID */
2693 ret = mxt_lookup_bootloader_address(data, 0);
2694 if (ret)
2695 goto release_firmware;
2696
2697 mxt_free_input_device(data);
2698 mxt_free_object_table(data);
2699 } else {
2700 enable_irq(data->irq);
2701 }
2702
2703 reinit_completion(&data->bl_completion);
2704
2705 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2706 if (ret) {
2707 /* Bootloader may still be unlocked from previous attempt */
2708 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2709 if (ret)
2710 goto disable_irq;
2711 } else {
2712 dev_info(dev, "Unlocking bootloader\n");
2713
2714 /* Unlock bootloader */
2715 ret = mxt_send_bootloader_cmd(data, true);
2716 if (ret)
2717 goto disable_irq;
2718 }
2719
2720 while (pos < fw->size) {
2721 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
2722 if (ret)
2723 goto disable_irq;
2724
2725 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2726
2727 /* Take account of CRC bytes */
2728 frame_size += 2;
2729
2730 /* Write one frame to device */
2731 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2732 if (ret)
2733 goto disable_irq;
2734
2735 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
2736 if (ret) {
2737 retry++;
2738
2739 /* Back off by 20ms per retry */
2740 msleep(retry * 20);
2741
2742 if (retry > 20) {
2743 dev_err(dev, "Retry count exceeded\n");
2744 goto disable_irq;
2745 }
2746 } else {
2747 retry = 0;
2748 pos += frame_size;
2749 frame++;
2750 }
2751
2752 if (frame % 50 == 0)
2753 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2754 frame, pos, fw->size);
2755 }
2756
2757 /* Wait for flash. */
2758 ret = mxt_wait_for_completion(data, &data->bl_completion,
2759 MXT_FW_RESET_TIME);
2760 if (ret)
2761 goto disable_irq;
2762
2763 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2764
2765 /*
2766 * Wait for device to reset. Some bootloader versions do not assert
2767 * the CHG line after bootloading has finished, so ignore potential
2768 * errors.
2769 */
2770 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
2771
2772 data->in_bootloader = false;
2773
2774 disable_irq:
2775 disable_irq(data->irq);
2776 release_firmware:
2777 release_firmware(fw);
2778 return ret;
2779 }
2780
2781 static ssize_t mxt_update_fw_store(struct device *dev,
2782 struct device_attribute *attr,
2783 const char *buf, size_t count)
2784 {
2785 struct mxt_data *data = dev_get_drvdata(dev);
2786 int error;
2787
2788 error = mxt_load_fw(dev, MXT_FW_NAME);
2789 if (error) {
2790 dev_err(dev, "The firmware update failed(%d)\n", error);
2791 count = error;
2792 } else {
2793 dev_info(dev, "The firmware update succeeded\n");
2794
2795 error = mxt_initialize(data);
2796 if (error)
2797 return error;
2798 }
2799
2800 return count;
2801 }
2802
2803 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2804 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
2805 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2806 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
2807
2808 static struct attribute *mxt_attrs[] = {
2809 &dev_attr_fw_version.attr,
2810 &dev_attr_hw_version.attr,
2811 &dev_attr_object.attr,
2812 &dev_attr_update_fw.attr,
2813 NULL
2814 };
2815
2816 static const struct attribute_group mxt_attr_group = {
2817 .attrs = mxt_attrs,
2818 };
2819
2820 static void mxt_start(struct mxt_data *data)
2821 {
2822 switch (data->pdata->suspend_mode) {
2823 case MXT_SUSPEND_T9_CTRL:
2824 mxt_soft_reset(data);
2825
2826 /* Touch enable */
2827 /* 0x83 = SCANEN | RPTEN | ENABLE */
2828 mxt_write_object(data,
2829 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
2830 break;
2831
2832 case MXT_SUSPEND_DEEP_SLEEP:
2833 default:
2834 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2835
2836 /* Recalibrate since chip has been in deep sleep */
2837 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
2838 break;
2839 }
2840
2841 }
2842
2843 static void mxt_stop(struct mxt_data *data)
2844 {
2845 switch (data->pdata->suspend_mode) {
2846 case MXT_SUSPEND_T9_CTRL:
2847 /* Touch disable */
2848 mxt_write_object(data,
2849 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
2850 break;
2851
2852 case MXT_SUSPEND_DEEP_SLEEP:
2853 default:
2854 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
2855 break;
2856 }
2857 }
2858
2859 static int mxt_input_open(struct input_dev *dev)
2860 {
2861 struct mxt_data *data = input_get_drvdata(dev);
2862
2863 mxt_start(data);
2864
2865 return 0;
2866 }
2867
2868 static void mxt_input_close(struct input_dev *dev)
2869 {
2870 struct mxt_data *data = input_get_drvdata(dev);
2871
2872 mxt_stop(data);
2873 }
2874
2875 #ifdef CONFIG_OF
2876 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2877 {
2878 struct mxt_platform_data *pdata;
2879 struct device_node *np = client->dev.of_node;
2880 u32 *keymap;
2881 int proplen, ret;
2882
2883 if (!np)
2884 return ERR_PTR(-ENOENT);
2885
2886 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
2887 if (!pdata)
2888 return ERR_PTR(-ENOMEM);
2889
2890 if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
2891 pdata->t19_num_keys = proplen / sizeof(u32);
2892
2893 keymap = devm_kzalloc(&client->dev,
2894 pdata->t19_num_keys * sizeof(keymap[0]),
2895 GFP_KERNEL);
2896 if (!keymap)
2897 return ERR_PTR(-ENOMEM);
2898
2899 ret = of_property_read_u32_array(np, "linux,gpio-keymap",
2900 keymap, pdata->t19_num_keys);
2901 if (ret)
2902 dev_warn(&client->dev,
2903 "Couldn't read linux,gpio-keymap: %d\n", ret);
2904
2905 pdata->t19_keymap = keymap;
2906 }
2907
2908 pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
2909
2910 return pdata;
2911 }
2912 #else
2913 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2914 {
2915 return ERR_PTR(-ENOENT);
2916 }
2917 #endif
2918
2919 #ifdef CONFIG_ACPI
2920
2921 struct mxt_acpi_platform_data {
2922 const char *hid;
2923 struct mxt_platform_data pdata;
2924 };
2925
2926 static unsigned int samus_touchpad_buttons[] = {
2927 KEY_RESERVED,
2928 KEY_RESERVED,
2929 KEY_RESERVED,
2930 BTN_LEFT
2931 };
2932
2933 static struct mxt_acpi_platform_data samus_platform_data[] = {
2934 {
2935 /* Touchpad */
2936 .hid = "ATML0000",
2937 .pdata = {
2938 .t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons),
2939 .t19_keymap = samus_touchpad_buttons,
2940 },
2941 },
2942 {
2943 /* Touchscreen */
2944 .hid = "ATML0001",
2945 },
2946 { }
2947 };
2948
2949 static unsigned int chromebook_tp_buttons[] = {
2950 KEY_RESERVED,
2951 KEY_RESERVED,
2952 KEY_RESERVED,
2953 KEY_RESERVED,
2954 KEY_RESERVED,
2955 BTN_LEFT
2956 };
2957
2958 static struct mxt_acpi_platform_data chromebook_platform_data[] = {
2959 {
2960 /* Touchpad */
2961 .hid = "ATML0000",
2962 .pdata = {
2963 .t19_num_keys = ARRAY_SIZE(chromebook_tp_buttons),
2964 .t19_keymap = chromebook_tp_buttons,
2965 },
2966 },
2967 {
2968 /* Touchscreen */
2969 .hid = "ATML0001",
2970 },
2971 { }
2972 };
2973
2974 static const struct dmi_system_id mxt_dmi_table[] = {
2975 {
2976 /* 2015 Google Pixel */
2977 .ident = "Chromebook Pixel 2",
2978 .matches = {
2979 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
2980 DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
2981 },
2982 .driver_data = samus_platform_data,
2983 },
2984 {
2985 /* Other Google Chromebooks */
2986 .ident = "Chromebook",
2987 .matches = {
2988 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
2989 },
2990 .driver_data = chromebook_platform_data,
2991 },
2992 { }
2993 };
2994
2995 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
2996 {
2997 struct acpi_device *adev;
2998 const struct dmi_system_id *system_id;
2999 const struct mxt_acpi_platform_data *acpi_pdata;
3000
3001 /*
3002 * Ignore ACPI devices representing bootloader mode.
3003 *
3004 * This is a bit of a hack: Google Chromebook BIOS creates ACPI
3005 * devices for both application and bootloader modes, but we are
3006 * interested in application mode only (if device is in bootloader
3007 * mode we'll end up switching into application anyway). So far
3008 * application mode addresses were all above 0x40, so we'll use it
3009 * as a threshold.
3010 */
3011 if (client->addr < 0x40)
3012 return ERR_PTR(-ENXIO);
3013
3014 adev = ACPI_COMPANION(&client->dev);
3015 if (!adev)
3016 return ERR_PTR(-ENOENT);
3017
3018 system_id = dmi_first_match(mxt_dmi_table);
3019 if (!system_id)
3020 return ERR_PTR(-ENOENT);
3021
3022 acpi_pdata = system_id->driver_data;
3023 if (!acpi_pdata)
3024 return ERR_PTR(-ENOENT);
3025
3026 while (acpi_pdata->hid) {
3027 if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid))
3028 return &acpi_pdata->pdata;
3029
3030 acpi_pdata++;
3031 }
3032
3033 return ERR_PTR(-ENOENT);
3034 }
3035 #else
3036 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
3037 {
3038 return ERR_PTR(-ENOENT);
3039 }
3040 #endif
3041
3042 static const struct mxt_platform_data *
3043 mxt_get_platform_data(struct i2c_client *client)
3044 {
3045 const struct mxt_platform_data *pdata;
3046
3047 pdata = dev_get_platdata(&client->dev);
3048 if (pdata)
3049 return pdata;
3050
3051 pdata = mxt_parse_dt(client);
3052 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
3053 return pdata;
3054
3055 pdata = mxt_parse_acpi(client);
3056 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
3057 return pdata;
3058
3059 dev_err(&client->dev, "No platform data specified\n");
3060 return ERR_PTR(-EINVAL);
3061 }
3062
3063 static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
3064 {
3065 struct mxt_data *data;
3066 const struct mxt_platform_data *pdata;
3067 int error;
3068
3069 pdata = mxt_get_platform_data(client);
3070 if (IS_ERR(pdata))
3071 return PTR_ERR(pdata);
3072
3073 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
3074 if (!data) {
3075 dev_err(&client->dev, "Failed to allocate memory\n");
3076 return -ENOMEM;
3077 }
3078
3079 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
3080 client->adapter->nr, client->addr);
3081
3082 data->client = client;
3083 data->pdata = pdata;
3084 data->irq = client->irq;
3085 i2c_set_clientdata(client, data);
3086
3087 init_completion(&data->bl_completion);
3088 init_completion(&data->reset_completion);
3089 init_completion(&data->crc_completion);
3090
3091 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
3092 pdata->irqflags | IRQF_ONESHOT,
3093 client->name, data);
3094 if (error) {
3095 dev_err(&client->dev, "Failed to register interrupt\n");
3096 goto err_free_mem;
3097 }
3098
3099 disable_irq(client->irq);
3100
3101 error = mxt_initialize(data);
3102 if (error)
3103 goto err_free_irq;
3104
3105 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
3106 if (error) {
3107 dev_err(&client->dev, "Failure %d creating sysfs group\n",
3108 error);
3109 goto err_free_object;
3110 }
3111
3112 return 0;
3113
3114 err_free_object:
3115 mxt_free_input_device(data);
3116 mxt_free_object_table(data);
3117 err_free_irq:
3118 free_irq(client->irq, data);
3119 err_free_mem:
3120 kfree(data);
3121 return error;
3122 }
3123
3124 static int mxt_remove(struct i2c_client *client)
3125 {
3126 struct mxt_data *data = i2c_get_clientdata(client);
3127
3128 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
3129 free_irq(data->irq, data);
3130 mxt_free_input_device(data);
3131 mxt_free_object_table(data);
3132 kfree(data);
3133
3134 return 0;
3135 }
3136
3137 static int __maybe_unused mxt_suspend(struct device *dev)
3138 {
3139 struct i2c_client *client = to_i2c_client(dev);
3140 struct mxt_data *data = i2c_get_clientdata(client);
3141 struct input_dev *input_dev = data->input_dev;
3142
3143 if (!input_dev)
3144 return 0;
3145
3146 mutex_lock(&input_dev->mutex);
3147
3148 if (input_dev->users)
3149 mxt_stop(data);
3150
3151 mutex_unlock(&input_dev->mutex);
3152
3153 return 0;
3154 }
3155
3156 static int __maybe_unused mxt_resume(struct device *dev)
3157 {
3158 struct i2c_client *client = to_i2c_client(dev);
3159 struct mxt_data *data = i2c_get_clientdata(client);
3160 struct input_dev *input_dev = data->input_dev;
3161
3162 if (!input_dev)
3163 return 0;
3164
3165 mutex_lock(&input_dev->mutex);
3166
3167 if (input_dev->users)
3168 mxt_start(data);
3169
3170 mutex_unlock(&input_dev->mutex);
3171
3172 return 0;
3173 }
3174
3175 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
3176
3177 static const struct of_device_id mxt_of_match[] = {
3178 { .compatible = "atmel,maxtouch", },
3179 {},
3180 };
3181 MODULE_DEVICE_TABLE(of, mxt_of_match);
3182
3183 #ifdef CONFIG_ACPI
3184 static const struct acpi_device_id mxt_acpi_id[] = {
3185 { "ATML0000", 0 }, /* Touchpad */
3186 { "ATML0001", 0 }, /* Touchscreen */
3187 { }
3188 };
3189 MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
3190 #endif
3191
3192 static const struct i2c_device_id mxt_id[] = {
3193 { "qt602240_ts", 0 },
3194 { "atmel_mxt_ts", 0 },
3195 { "atmel_mxt_tp", 0 },
3196 { "maxtouch", 0 },
3197 { "mXT224", 0 },
3198 { }
3199 };
3200 MODULE_DEVICE_TABLE(i2c, mxt_id);
3201
3202 static struct i2c_driver mxt_driver = {
3203 .driver = {
3204 .name = "atmel_mxt_ts",
3205 .of_match_table = of_match_ptr(mxt_of_match),
3206 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
3207 .pm = &mxt_pm_ops,
3208 },
3209 .probe = mxt_probe,
3210 .remove = mxt_remove,
3211 .id_table = mxt_id,
3212 };
3213
3214 module_i2c_driver(mxt_driver);
3215
3216 /* Module information */
3217 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
3218 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
3219 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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