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[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_PROCI_GRIPFACE_T20:
354 case MXT_PROCG_NOISE_T22:
355 case MXT_PROCI_ONETOUCH_T24:
356 case MXT_PROCI_TWOTOUCH_T27:
357 case MXT_PROCI_GRIP_T40:
358 case MXT_PROCI_PALM_T41:
359 case MXT_PROCI_TOUCHSUPPRESSION_T42:
360 case MXT_PROCI_STYLUS_T47:
361 case MXT_PROCG_NOISESUPPRESSION_T48:
362 case MXT_SPT_COMMSCONFIG_T18:
363 case MXT_SPT_GPIOPWM_T19:
364 case MXT_SPT_SELFTEST_T25:
365 case MXT_SPT_CTECONFIG_T28:
366 case MXT_SPT_USERDATA_T38:
367 case MXT_SPT_DIGITIZER_T43:
368 case MXT_SPT_CTECONFIG_T46:
369 return true;
370 default:
371 return false;
372 }
373 }
374
375 static void mxt_dump_message(struct mxt_data *data, u8 *message)
376 {
377 dev_dbg(&data->client->dev, "message: %*ph\n",
378 data->T5_msg_size, message);
379 }
380
381 static int mxt_wait_for_completion(struct mxt_data *data,
382 struct completion *comp,
383 unsigned int timeout_ms)
384 {
385 struct device *dev = &data->client->dev;
386 unsigned long timeout = msecs_to_jiffies(timeout_ms);
387 long ret;
388
389 ret = wait_for_completion_interruptible_timeout(comp, timeout);
390 if (ret < 0) {
391 return ret;
392 } else if (ret == 0) {
393 dev_err(dev, "Wait for completion timed out.\n");
394 return -ETIMEDOUT;
395 }
396 return 0;
397 }
398
399 static int mxt_bootloader_read(struct mxt_data *data,
400 u8 *val, unsigned int count)
401 {
402 int ret;
403 struct i2c_msg msg;
404
405 msg.addr = data->bootloader_addr;
406 msg.flags = data->client->flags & I2C_M_TEN;
407 msg.flags |= I2C_M_RD;
408 msg.len = count;
409 msg.buf = val;
410
411 ret = i2c_transfer(data->client->adapter, &msg, 1);
412 if (ret == 1) {
413 ret = 0;
414 } else {
415 ret = ret < 0 ? ret : -EIO;
416 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
417 __func__, ret);
418 }
419
420 return ret;
421 }
422
423 static int mxt_bootloader_write(struct mxt_data *data,
424 const u8 * const val, unsigned int count)
425 {
426 int ret;
427 struct i2c_msg msg;
428
429 msg.addr = data->bootloader_addr;
430 msg.flags = data->client->flags & I2C_M_TEN;
431 msg.len = count;
432 msg.buf = (u8 *)val;
433
434 ret = i2c_transfer(data->client->adapter, &msg, 1);
435 if (ret == 1) {
436 ret = 0;
437 } else {
438 ret = ret < 0 ? ret : -EIO;
439 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
440 __func__, ret);
441 }
442
443 return ret;
444 }
445
446 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
447 {
448 u8 appmode = data->client->addr;
449 u8 bootloader;
450
451 switch (appmode) {
452 case 0x4a:
453 case 0x4b:
454 /* Chips after 1664S use different scheme */
455 if (retry || data->info.family_id >= 0xa2) {
456 bootloader = appmode - 0x24;
457 break;
458 }
459 /* Fall through for normal case */
460 case 0x4c:
461 case 0x4d:
462 case 0x5a:
463 case 0x5b:
464 bootloader = appmode - 0x26;
465 break;
466
467 default:
468 dev_err(&data->client->dev,
469 "Appmode i2c address 0x%02x not found\n",
470 appmode);
471 return -EINVAL;
472 }
473
474 data->bootloader_addr = bootloader;
475 return 0;
476 }
477
478 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
479 {
480 struct device *dev = &data->client->dev;
481 int error;
482 u8 val;
483 bool crc_failure;
484
485 error = mxt_lookup_bootloader_address(data, alt_address);
486 if (error)
487 return error;
488
489 error = mxt_bootloader_read(data, &val, 1);
490 if (error)
491 return error;
492
493 /* Check app crc fail mode */
494 crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
495
496 dev_err(dev, "Detected bootloader, status:%02X%s\n",
497 val, crc_failure ? ", APP_CRC_FAIL" : "");
498
499 return 0;
500 }
501
502 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
503 {
504 struct device *dev = &data->client->dev;
505 u8 buf[3];
506
507 if (val & MXT_BOOT_EXTENDED_ID) {
508 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
509 dev_err(dev, "%s: i2c failure\n", __func__);
510 return val;
511 }
512
513 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
514
515 return buf[0];
516 } else {
517 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
518
519 return val;
520 }
521 }
522
523 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
524 bool wait)
525 {
526 struct device *dev = &data->client->dev;
527 u8 val;
528 int ret;
529
530 recheck:
531 if (wait) {
532 /*
533 * In application update mode, the interrupt
534 * line signals state transitions. We must wait for the
535 * CHG assertion before reading the status byte.
536 * Once the status byte has been read, the line is deasserted.
537 */
538 ret = mxt_wait_for_completion(data, &data->bl_completion,
539 MXT_FW_CHG_TIMEOUT);
540 if (ret) {
541 /*
542 * TODO: handle -ERESTARTSYS better by terminating
543 * fw update process before returning to userspace
544 * by writing length 0x000 to device (iff we are in
545 * WAITING_FRAME_DATA state).
546 */
547 dev_err(dev, "Update wait error %d\n", ret);
548 return ret;
549 }
550 }
551
552 ret = mxt_bootloader_read(data, &val, 1);
553 if (ret)
554 return ret;
555
556 if (state == MXT_WAITING_BOOTLOAD_CMD)
557 val = mxt_get_bootloader_version(data, val);
558
559 switch (state) {
560 case MXT_WAITING_BOOTLOAD_CMD:
561 case MXT_WAITING_FRAME_DATA:
562 case MXT_APP_CRC_FAIL:
563 val &= ~MXT_BOOT_STATUS_MASK;
564 break;
565 case MXT_FRAME_CRC_PASS:
566 if (val == MXT_FRAME_CRC_CHECK) {
567 goto recheck;
568 } else if (val == MXT_FRAME_CRC_FAIL) {
569 dev_err(dev, "Bootloader CRC fail\n");
570 return -EINVAL;
571 }
572 break;
573 default:
574 return -EINVAL;
575 }
576
577 if (val != state) {
578 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
579 val, state);
580 return -EINVAL;
581 }
582
583 return 0;
584 }
585
586 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
587 {
588 int ret;
589 u8 buf[2];
590
591 if (unlock) {
592 buf[0] = MXT_UNLOCK_CMD_LSB;
593 buf[1] = MXT_UNLOCK_CMD_MSB;
594 } else {
595 buf[0] = 0x01;
596 buf[1] = 0x01;
597 }
598
599 ret = mxt_bootloader_write(data, buf, 2);
600 if (ret)
601 return ret;
602
603 return 0;
604 }
605
606 static int __mxt_read_reg(struct i2c_client *client,
607 u16 reg, u16 len, void *val)
608 {
609 struct i2c_msg xfer[2];
610 u8 buf[2];
611 int ret;
612
613 buf[0] = reg & 0xff;
614 buf[1] = (reg >> 8) & 0xff;
615
616 /* Write register */
617 xfer[0].addr = client->addr;
618 xfer[0].flags = 0;
619 xfer[0].len = 2;
620 xfer[0].buf = buf;
621
622 /* Read data */
623 xfer[1].addr = client->addr;
624 xfer[1].flags = I2C_M_RD;
625 xfer[1].len = len;
626 xfer[1].buf = val;
627
628 ret = i2c_transfer(client->adapter, xfer, 2);
629 if (ret == 2) {
630 ret = 0;
631 } else {
632 if (ret >= 0)
633 ret = -EIO;
634 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
635 __func__, ret);
636 }
637
638 return ret;
639 }
640
641 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
642 const void *val)
643 {
644 u8 *buf;
645 size_t count;
646 int ret;
647
648 count = len + 2;
649 buf = kmalloc(count, GFP_KERNEL);
650 if (!buf)
651 return -ENOMEM;
652
653 buf[0] = reg & 0xff;
654 buf[1] = (reg >> 8) & 0xff;
655 memcpy(&buf[2], val, len);
656
657 ret = i2c_master_send(client, buf, count);
658 if (ret == count) {
659 ret = 0;
660 } else {
661 if (ret >= 0)
662 ret = -EIO;
663 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
664 __func__, ret);
665 }
666
667 kfree(buf);
668 return ret;
669 }
670
671 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
672 {
673 return __mxt_write_reg(client, reg, 1, &val);
674 }
675
676 static struct mxt_object *
677 mxt_get_object(struct mxt_data *data, u8 type)
678 {
679 struct mxt_object *object;
680 int i;
681
682 for (i = 0; i < data->info.object_num; i++) {
683 object = data->object_table + i;
684 if (object->type == type)
685 return object;
686 }
687
688 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
689 return NULL;
690 }
691
692 static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
693 {
694 struct device *dev = &data->client->dev;
695 u8 status = msg[1];
696 u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
697
698 complete(&data->crc_completion);
699
700 if (crc != data->config_crc) {
701 data->config_crc = crc;
702 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
703 }
704
705 /* Detect reset */
706 if (status & MXT_T6_STATUS_RESET)
707 complete(&data->reset_completion);
708
709 /* Output debug if status has changed */
710 if (status != data->t6_status)
711 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
712 status,
713 status == 0 ? " OK" : "",
714 status & MXT_T6_STATUS_RESET ? " RESET" : "",
715 status & MXT_T6_STATUS_OFL ? " OFL" : "",
716 status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
717 status & MXT_T6_STATUS_CAL ? " CAL" : "",
718 status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
719 status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
720
721 /* Save current status */
722 data->t6_status = status;
723 }
724
725 static int mxt_write_object(struct mxt_data *data,
726 u8 type, u8 offset, u8 val)
727 {
728 struct mxt_object *object;
729 u16 reg;
730
731 object = mxt_get_object(data, type);
732 if (!object || offset >= mxt_obj_size(object))
733 return -EINVAL;
734
735 reg = object->start_address;
736 return mxt_write_reg(data->client, reg + offset, val);
737 }
738
739 static void mxt_input_button(struct mxt_data *data, u8 *message)
740 {
741 struct input_dev *input = data->input_dev;
742 const struct mxt_platform_data *pdata = data->pdata;
743 int i;
744
745 for (i = 0; i < pdata->t19_num_keys; i++) {
746 if (pdata->t19_keymap[i] == KEY_RESERVED)
747 continue;
748
749 /* Active-low switch */
750 input_report_key(input, pdata->t19_keymap[i],
751 !(message[1] & BIT(i)));
752 }
753 }
754
755 static void mxt_input_sync(struct mxt_data *data)
756 {
757 input_mt_report_pointer_emulation(data->input_dev,
758 data->pdata->t19_num_keys);
759 input_sync(data->input_dev);
760 }
761
762 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
763 {
764 struct device *dev = &data->client->dev;
765 struct input_dev *input_dev = data->input_dev;
766 int id;
767 u8 status;
768 int x;
769 int y;
770 int area;
771 int amplitude;
772
773 id = message[0] - data->T9_reportid_min;
774 status = message[1];
775 x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
776 y = (message[3] << 4) | ((message[4] & 0xf));
777
778 /* Handle 10/12 bit switching */
779 if (data->max_x < 1024)
780 x >>= 2;
781 if (data->max_y < 1024)
782 y >>= 2;
783
784 area = message[5];
785 amplitude = message[6];
786
787 dev_dbg(dev,
788 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
789 id,
790 (status & MXT_T9_DETECT) ? 'D' : '.',
791 (status & MXT_T9_PRESS) ? 'P' : '.',
792 (status & MXT_T9_RELEASE) ? 'R' : '.',
793 (status & MXT_T9_MOVE) ? 'M' : '.',
794 (status & MXT_T9_VECTOR) ? 'V' : '.',
795 (status & MXT_T9_AMP) ? 'A' : '.',
796 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
797 (status & MXT_T9_UNGRIP) ? 'U' : '.',
798 x, y, area, amplitude);
799
800 input_mt_slot(input_dev, id);
801
802 if (status & MXT_T9_DETECT) {
803 /*
804 * Multiple bits may be set if the host is slow to read
805 * the status messages, indicating all the events that
806 * have happened.
807 */
808 if (status & MXT_T9_RELEASE) {
809 input_mt_report_slot_state(input_dev,
810 MT_TOOL_FINGER, 0);
811 mxt_input_sync(data);
812 }
813
814 /* Touch active */
815 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
816 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
817 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
818 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
819 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
820 } else {
821 /* Touch no longer active, close out slot */
822 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
823 }
824
825 data->update_input = true;
826 }
827
828 static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
829 {
830 struct device *dev = &data->client->dev;
831 struct input_dev *input_dev = data->input_dev;
832 int id;
833 u8 status;
834 u8 type = 0;
835 u16 x;
836 u16 y;
837 int distance = 0;
838 int tool = 0;
839 u8 major = 0;
840 u8 pressure = 0;
841 u8 orientation = 0;
842
843 id = message[0] - data->T100_reportid_min - 2;
844
845 /* ignore SCRSTATUS events */
846 if (id < 0)
847 return;
848
849 status = message[1];
850 x = get_unaligned_le16(&message[2]);
851 y = get_unaligned_le16(&message[4]);
852
853 if (status & MXT_T100_DETECT) {
854 type = (status & MXT_T100_TYPE_MASK) >> 4;
855
856 switch (type) {
857 case MXT_T100_TYPE_HOVERING_FINGER:
858 tool = MT_TOOL_FINGER;
859 distance = MXT_DISTANCE_HOVERING;
860
861 if (data->t100_aux_vect)
862 orientation = message[data->t100_aux_vect];
863
864 break;
865
866 case MXT_T100_TYPE_FINGER:
867 case MXT_T100_TYPE_GLOVE:
868 tool = MT_TOOL_FINGER;
869 distance = MXT_DISTANCE_ACTIVE_TOUCH;
870
871 if (data->t100_aux_area)
872 major = message[data->t100_aux_area];
873
874 if (data->t100_aux_ampl)
875 pressure = message[data->t100_aux_ampl];
876
877 if (data->t100_aux_vect)
878 orientation = message[data->t100_aux_vect];
879
880 break;
881
882 case MXT_T100_TYPE_PASSIVE_STYLUS:
883 tool = MT_TOOL_PEN;
884
885 /*
886 * Passive stylus is reported with size zero so
887 * hardcode.
888 */
889 major = MXT_TOUCH_MAJOR_DEFAULT;
890
891 if (data->t100_aux_ampl)
892 pressure = message[data->t100_aux_ampl];
893
894 break;
895
896 case MXT_T100_TYPE_LARGE_TOUCH:
897 /* Ignore suppressed touch */
898 break;
899
900 default:
901 dev_dbg(dev, "Unexpected T100 type\n");
902 return;
903 }
904 }
905
906 /*
907 * Values reported should be non-zero if tool is touching the
908 * device
909 */
910 if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
911 pressure = MXT_PRESSURE_DEFAULT;
912
913 input_mt_slot(input_dev, id);
914
915 if (status & MXT_T100_DETECT) {
916 dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
917 id, type, x, y, major, pressure, orientation);
918
919 input_mt_report_slot_state(input_dev, tool, 1);
920 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
921 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
922 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
923 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
924 input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
925 input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
926 } else {
927 dev_dbg(dev, "[%u] release\n", id);
928
929 /* close out slot */
930 input_mt_report_slot_state(input_dev, 0, 0);
931 }
932
933 data->update_input = true;
934 }
935
936 static int mxt_proc_message(struct mxt_data *data, u8 *message)
937 {
938 u8 report_id = message[0];
939
940 if (report_id == MXT_RPTID_NOMSG)
941 return 0;
942
943 if (report_id == data->T6_reportid) {
944 mxt_proc_t6_messages(data, message);
945 } else if (!data->input_dev) {
946 /*
947 * Do not report events if input device
948 * is not yet registered.
949 */
950 mxt_dump_message(data, message);
951 } else if (report_id >= data->T9_reportid_min &&
952 report_id <= data->T9_reportid_max) {
953 mxt_proc_t9_message(data, message);
954 } else if (report_id >= data->T100_reportid_min &&
955 report_id <= data->T100_reportid_max) {
956 mxt_proc_t100_message(data, message);
957 } else if (report_id == data->T19_reportid) {
958 mxt_input_button(data, message);
959 data->update_input = true;
960 } else {
961 mxt_dump_message(data, message);
962 }
963
964 return 1;
965 }
966
967 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
968 {
969 struct device *dev = &data->client->dev;
970 int ret;
971 int i;
972 u8 num_valid = 0;
973
974 /* Safety check for msg_buf */
975 if (count > data->max_reportid)
976 return -EINVAL;
977
978 /* Process remaining messages if necessary */
979 ret = __mxt_read_reg(data->client, data->T5_address,
980 data->T5_msg_size * count, data->msg_buf);
981 if (ret) {
982 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
983 return ret;
984 }
985
986 for (i = 0; i < count; i++) {
987 ret = mxt_proc_message(data,
988 data->msg_buf + data->T5_msg_size * i);
989
990 if (ret == 1)
991 num_valid++;
992 }
993
994 /* return number of messages read */
995 return num_valid;
996 }
997
998 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
999 {
1000 struct device *dev = &data->client->dev;
1001 int ret;
1002 u8 count, num_left;
1003
1004 /* Read T44 and T5 together */
1005 ret = __mxt_read_reg(data->client, data->T44_address,
1006 data->T5_msg_size + 1, data->msg_buf);
1007 if (ret) {
1008 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
1009 return IRQ_NONE;
1010 }
1011
1012 count = data->msg_buf[0];
1013
1014 /*
1015 * This condition may be caused by the CHG line being configured in
1016 * Mode 0. It results in unnecessary I2C operations but it is benign.
1017 */
1018 if (count == 0)
1019 return IRQ_NONE;
1020
1021 if (count > data->max_reportid) {
1022 dev_warn(dev, "T44 count %d exceeded max report id\n", count);
1023 count = data->max_reportid;
1024 }
1025
1026 /* Process first message */
1027 ret = mxt_proc_message(data, data->msg_buf + 1);
1028 if (ret < 0) {
1029 dev_warn(dev, "Unexpected invalid message\n");
1030 return IRQ_NONE;
1031 }
1032
1033 num_left = count - 1;
1034
1035 /* Process remaining messages if necessary */
1036 if (num_left) {
1037 ret = mxt_read_and_process_messages(data, num_left);
1038 if (ret < 0)
1039 goto end;
1040 else if (ret != num_left)
1041 dev_warn(dev, "Unexpected invalid message\n");
1042 }
1043
1044 end:
1045 if (data->update_input) {
1046 mxt_input_sync(data);
1047 data->update_input = false;
1048 }
1049
1050 return IRQ_HANDLED;
1051 }
1052
1053 static int mxt_process_messages_until_invalid(struct mxt_data *data)
1054 {
1055 struct device *dev = &data->client->dev;
1056 int count, read;
1057 u8 tries = 2;
1058
1059 count = data->max_reportid;
1060
1061 /* Read messages until we force an invalid */
1062 do {
1063 read = mxt_read_and_process_messages(data, count);
1064 if (read < count)
1065 return 0;
1066 } while (--tries);
1067
1068 if (data->update_input) {
1069 mxt_input_sync(data);
1070 data->update_input = false;
1071 }
1072
1073 dev_err(dev, "CHG pin isn't cleared\n");
1074 return -EBUSY;
1075 }
1076
1077 static irqreturn_t mxt_process_messages(struct mxt_data *data)
1078 {
1079 int total_handled, num_handled;
1080 u8 count = data->last_message_count;
1081
1082 if (count < 1 || count > data->max_reportid)
1083 count = 1;
1084
1085 /* include final invalid message */
1086 total_handled = mxt_read_and_process_messages(data, count + 1);
1087 if (total_handled < 0)
1088 return IRQ_NONE;
1089 /* if there were invalid messages, then we are done */
1090 else if (total_handled <= count)
1091 goto update_count;
1092
1093 /* keep reading two msgs until one is invalid or reportid limit */
1094 do {
1095 num_handled = mxt_read_and_process_messages(data, 2);
1096 if (num_handled < 0)
1097 return IRQ_NONE;
1098
1099 total_handled += num_handled;
1100
1101 if (num_handled < 2)
1102 break;
1103 } while (total_handled < data->num_touchids);
1104
1105 update_count:
1106 data->last_message_count = total_handled;
1107
1108 if (data->update_input) {
1109 mxt_input_sync(data);
1110 data->update_input = false;
1111 }
1112
1113 return IRQ_HANDLED;
1114 }
1115
1116 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1117 {
1118 struct mxt_data *data = dev_id;
1119
1120 if (data->in_bootloader) {
1121 /* bootloader state transition completion */
1122 complete(&data->bl_completion);
1123 return IRQ_HANDLED;
1124 }
1125
1126 if (!data->object_table)
1127 return IRQ_HANDLED;
1128
1129 if (data->T44_address) {
1130 return mxt_process_messages_t44(data);
1131 } else {
1132 return mxt_process_messages(data);
1133 }
1134 }
1135
1136 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1137 u8 value, bool wait)
1138 {
1139 u16 reg;
1140 u8 command_register;
1141 int timeout_counter = 0;
1142 int ret;
1143
1144 reg = data->T6_address + cmd_offset;
1145
1146 ret = mxt_write_reg(data->client, reg, value);
1147 if (ret)
1148 return ret;
1149
1150 if (!wait)
1151 return 0;
1152
1153 do {
1154 msleep(20);
1155 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1156 if (ret)
1157 return ret;
1158 } while (command_register != 0 && timeout_counter++ <= 100);
1159
1160 if (timeout_counter > 100) {
1161 dev_err(&data->client->dev, "Command failed!\n");
1162 return -EIO;
1163 }
1164
1165 return 0;
1166 }
1167
1168 static int mxt_acquire_irq(struct mxt_data *data)
1169 {
1170 int error;
1171
1172 enable_irq(data->irq);
1173
1174 error = mxt_process_messages_until_invalid(data);
1175 if (error)
1176 return error;
1177
1178 return 0;
1179 }
1180
1181 static int mxt_soft_reset(struct mxt_data *data)
1182 {
1183 struct device *dev = &data->client->dev;
1184 int ret = 0;
1185
1186 dev_info(dev, "Resetting device\n");
1187
1188 disable_irq(data->irq);
1189
1190 reinit_completion(&data->reset_completion);
1191
1192 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1193 if (ret)
1194 return ret;
1195
1196 /* Ignore CHG line for 100ms after reset */
1197 msleep(100);
1198
1199 mxt_acquire_irq(data);
1200
1201 ret = mxt_wait_for_completion(data, &data->reset_completion,
1202 MXT_RESET_TIMEOUT);
1203 if (ret)
1204 return ret;
1205
1206 return 0;
1207 }
1208
1209 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1210 {
1211 /*
1212 * On failure, CRC is set to 0 and config will always be
1213 * downloaded.
1214 */
1215 data->config_crc = 0;
1216 reinit_completion(&data->crc_completion);
1217
1218 mxt_t6_command(data, cmd, value, true);
1219
1220 /*
1221 * Wait for crc message. On failure, CRC is set to 0 and config will
1222 * always be downloaded.
1223 */
1224 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1225 }
1226
1227 static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1228 {
1229 static const unsigned int crcpoly = 0x80001B;
1230 u32 result;
1231 u32 data_word;
1232
1233 data_word = (secondbyte << 8) | firstbyte;
1234 result = ((*crc << 1) ^ data_word);
1235
1236 if (result & 0x1000000)
1237 result ^= crcpoly;
1238
1239 *crc = result;
1240 }
1241
1242 static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1243 {
1244 u32 crc = 0;
1245 u8 *ptr = base + start_off;
1246 u8 *last_val = base + end_off - 1;
1247
1248 if (end_off < start_off)
1249 return -EINVAL;
1250
1251 while (ptr < last_val) {
1252 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1253 ptr += 2;
1254 }
1255
1256 /* if len is odd, fill the last byte with 0 */
1257 if (ptr == last_val)
1258 mxt_calc_crc24(&crc, *ptr, 0);
1259
1260 /* Mask to 24-bit */
1261 crc &= 0x00FFFFFF;
1262
1263 return crc;
1264 }
1265
1266 static int mxt_prepare_cfg_mem(struct mxt_data *data,
1267 const struct firmware *cfg,
1268 unsigned int data_pos,
1269 unsigned int cfg_start_ofs,
1270 u8 *config_mem,
1271 size_t config_mem_size)
1272 {
1273 struct device *dev = &data->client->dev;
1274 struct mxt_object *object;
1275 unsigned int type, instance, size, byte_offset;
1276 int offset;
1277 int ret;
1278 int i;
1279 u16 reg;
1280 u8 val;
1281
1282 while (data_pos < cfg->size) {
1283 /* Read type, instance, length */
1284 ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
1285 &type, &instance, &size, &offset);
1286 if (ret == 0) {
1287 /* EOF */
1288 break;
1289 } else if (ret != 3) {
1290 dev_err(dev, "Bad format: failed to parse object\n");
1291 return -EINVAL;
1292 }
1293 data_pos += offset;
1294
1295 object = mxt_get_object(data, type);
1296 if (!object) {
1297 /* Skip object */
1298 for (i = 0; i < size; i++) {
1299 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1300 &val, &offset);
1301 if (ret != 1) {
1302 dev_err(dev, "Bad format in T%d at %d\n",
1303 type, i);
1304 return -EINVAL;
1305 }
1306 data_pos += offset;
1307 }
1308 continue;
1309 }
1310
1311 if (size > mxt_obj_size(object)) {
1312 /*
1313 * Either we are in fallback mode due to wrong
1314 * config or config from a later fw version,
1315 * or the file is corrupt or hand-edited.
1316 */
1317 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1318 size - mxt_obj_size(object), type);
1319 } else if (mxt_obj_size(object) > size) {
1320 /*
1321 * If firmware is upgraded, new bytes may be added to
1322 * end of objects. It is generally forward compatible
1323 * to zero these bytes - previous behaviour will be
1324 * retained. However this does invalidate the CRC and
1325 * will force fallback mode until the configuration is
1326 * updated. We warn here but do nothing else - the
1327 * malloc has zeroed the entire configuration.
1328 */
1329 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1330 mxt_obj_size(object) - size, type);
1331 }
1332
1333 if (instance >= mxt_obj_instances(object)) {
1334 dev_err(dev, "Object instances exceeded!\n");
1335 return -EINVAL;
1336 }
1337
1338 reg = object->start_address + mxt_obj_size(object) * instance;
1339
1340 for (i = 0; i < size; i++) {
1341 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1342 &val,
1343 &offset);
1344 if (ret != 1) {
1345 dev_err(dev, "Bad format in T%d at %d\n",
1346 type, i);
1347 return -EINVAL;
1348 }
1349 data_pos += offset;
1350
1351 if (i > mxt_obj_size(object))
1352 continue;
1353
1354 byte_offset = reg + i - cfg_start_ofs;
1355
1356 if (byte_offset >= 0 && byte_offset < config_mem_size) {
1357 *(config_mem + byte_offset) = val;
1358 } else {
1359 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1360 reg, object->type, byte_offset);
1361 return -EINVAL;
1362 }
1363 }
1364 }
1365
1366 return 0;
1367 }
1368
1369 static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
1370 u8 *config_mem, size_t config_mem_size)
1371 {
1372 unsigned int byte_offset = 0;
1373 int error;
1374
1375 /* Write configuration as blocks */
1376 while (byte_offset < config_mem_size) {
1377 unsigned int size = config_mem_size - byte_offset;
1378
1379 if (size > MXT_MAX_BLOCK_WRITE)
1380 size = MXT_MAX_BLOCK_WRITE;
1381
1382 error = __mxt_write_reg(data->client,
1383 cfg_start + byte_offset,
1384 size, config_mem + byte_offset);
1385 if (error) {
1386 dev_err(&data->client->dev,
1387 "Config write error, ret=%d\n", error);
1388 return error;
1389 }
1390
1391 byte_offset += size;
1392 }
1393
1394 return 0;
1395 }
1396
1397 static int mxt_init_t7_power_cfg(struct mxt_data *data);
1398
1399 /*
1400 * mxt_update_cfg - download configuration to chip
1401 *
1402 * Atmel Raw Config File Format
1403 *
1404 * The first four lines of the raw config file contain:
1405 * 1) Version
1406 * 2) Chip ID Information (first 7 bytes of device memory)
1407 * 3) Chip Information Block 24-bit CRC Checksum
1408 * 4) Chip Configuration 24-bit CRC Checksum
1409 *
1410 * The rest of the file consists of one line per object instance:
1411 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1412 *
1413 * <TYPE> - 2-byte object type as hex
1414 * <INSTANCE> - 2-byte object instance number as hex
1415 * <SIZE> - 2-byte object size as hex
1416 * <CONTENTS> - array of <SIZE> 1-byte hex values
1417 */
1418 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
1419 {
1420 struct device *dev = &data->client->dev;
1421 struct mxt_info cfg_info;
1422 int ret;
1423 int offset;
1424 int data_pos;
1425 int i;
1426 int cfg_start_ofs;
1427 u32 info_crc, config_crc, calculated_crc;
1428 u8 *config_mem;
1429 size_t config_mem_size;
1430
1431 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1432
1433 if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1434 dev_err(dev, "Unrecognised config file\n");
1435 return -EINVAL;
1436 }
1437
1438 data_pos = strlen(MXT_CFG_MAGIC);
1439
1440 /* Load information block and check */
1441 for (i = 0; i < sizeof(struct mxt_info); i++) {
1442 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1443 (unsigned char *)&cfg_info + i,
1444 &offset);
1445 if (ret != 1) {
1446 dev_err(dev, "Bad format\n");
1447 return -EINVAL;
1448 }
1449
1450 data_pos += offset;
1451 }
1452
1453 if (cfg_info.family_id != data->info.family_id) {
1454 dev_err(dev, "Family ID mismatch!\n");
1455 return -EINVAL;
1456 }
1457
1458 if (cfg_info.variant_id != data->info.variant_id) {
1459 dev_err(dev, "Variant ID mismatch!\n");
1460 return -EINVAL;
1461 }
1462
1463 /* Read CRCs */
1464 ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
1465 if (ret != 1) {
1466 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1467 return -EINVAL;
1468 }
1469 data_pos += offset;
1470
1471 ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
1472 if (ret != 1) {
1473 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1474 return -EINVAL;
1475 }
1476 data_pos += offset;
1477
1478 /*
1479 * The Info Block CRC is calculated over mxt_info and the object
1480 * table. If it does not match then we are trying to load the
1481 * configuration from a different chip or firmware version, so
1482 * the configuration CRC is invalid anyway.
1483 */
1484 if (info_crc == data->info_crc) {
1485 if (config_crc == 0 || data->config_crc == 0) {
1486 dev_info(dev, "CRC zero, attempting to apply config\n");
1487 } else if (config_crc == data->config_crc) {
1488 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1489 data->config_crc);
1490 return 0;
1491 } else {
1492 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1493 data->config_crc, config_crc);
1494 }
1495 } else {
1496 dev_warn(dev,
1497 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1498 data->info_crc, info_crc);
1499 }
1500
1501 /* Malloc memory to store configuration */
1502 cfg_start_ofs = MXT_OBJECT_START +
1503 data->info.object_num * sizeof(struct mxt_object) +
1504 MXT_INFO_CHECKSUM_SIZE;
1505 config_mem_size = data->mem_size - cfg_start_ofs;
1506 config_mem = kzalloc(config_mem_size, GFP_KERNEL);
1507 if (!config_mem) {
1508 dev_err(dev, "Failed to allocate memory\n");
1509 return -ENOMEM;
1510 }
1511
1512 ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
1513 config_mem, config_mem_size);
1514 if (ret)
1515 goto release_mem;
1516
1517 /* Calculate crc of the received configs (not the raw config file) */
1518 if (data->T7_address < cfg_start_ofs) {
1519 dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
1520 data->T7_address, cfg_start_ofs);
1521 ret = 0;
1522 goto release_mem;
1523 }
1524
1525 calculated_crc = mxt_calculate_crc(config_mem,
1526 data->T7_address - cfg_start_ofs,
1527 config_mem_size);
1528
1529 if (config_crc > 0 && config_crc != calculated_crc)
1530 dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
1531 calculated_crc, config_crc);
1532
1533 ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
1534 config_mem, config_mem_size);
1535 if (ret)
1536 goto release_mem;
1537
1538 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1539
1540 ret = mxt_soft_reset(data);
1541 if (ret)
1542 goto release_mem;
1543
1544 dev_info(dev, "Config successfully updated\n");
1545
1546 /* T7 config may have changed */
1547 mxt_init_t7_power_cfg(data);
1548
1549 release_mem:
1550 kfree(config_mem);
1551 return ret;
1552 }
1553
1554 static int mxt_get_info(struct mxt_data *data)
1555 {
1556 struct i2c_client *client = data->client;
1557 struct mxt_info *info = &data->info;
1558 int error;
1559
1560 /* Read 7-byte info block starting at address 0 */
1561 error = __mxt_read_reg(client, 0, sizeof(*info), info);
1562 if (error)
1563 return error;
1564
1565 return 0;
1566 }
1567
1568 static void mxt_free_input_device(struct mxt_data *data)
1569 {
1570 if (data->input_dev) {
1571 input_unregister_device(data->input_dev);
1572 data->input_dev = NULL;
1573 }
1574 }
1575
1576 static void mxt_free_object_table(struct mxt_data *data)
1577 {
1578 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
1579 video_unregister_device(&data->dbg.vdev);
1580 v4l2_device_unregister(&data->dbg.v4l2);
1581 #endif
1582
1583 kfree(data->object_table);
1584 data->object_table = NULL;
1585 kfree(data->msg_buf);
1586 data->msg_buf = NULL;
1587 data->T5_address = 0;
1588 data->T5_msg_size = 0;
1589 data->T6_reportid = 0;
1590 data->T7_address = 0;
1591 data->T9_reportid_min = 0;
1592 data->T9_reportid_max = 0;
1593 data->T19_reportid = 0;
1594 data->T44_address = 0;
1595 data->T100_reportid_min = 0;
1596 data->T100_reportid_max = 0;
1597 data->max_reportid = 0;
1598 }
1599
1600 static int mxt_get_object_table(struct mxt_data *data)
1601 {
1602 struct i2c_client *client = data->client;
1603 size_t table_size;
1604 struct mxt_object *object_table;
1605 int error;
1606 int i;
1607 u8 reportid;
1608 u16 end_address;
1609
1610 table_size = data->info.object_num * sizeof(struct mxt_object);
1611 object_table = kzalloc(table_size, GFP_KERNEL);
1612 if (!object_table) {
1613 dev_err(&data->client->dev, "Failed to allocate memory\n");
1614 return -ENOMEM;
1615 }
1616
1617 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
1618 object_table);
1619 if (error) {
1620 kfree(object_table);
1621 return error;
1622 }
1623
1624 /* Valid Report IDs start counting from 1 */
1625 reportid = 1;
1626 data->mem_size = 0;
1627 for (i = 0; i < data->info.object_num; i++) {
1628 struct mxt_object *object = object_table + i;
1629 u8 min_id, max_id;
1630
1631 le16_to_cpus(&object->start_address);
1632
1633 if (object->num_report_ids) {
1634 min_id = reportid;
1635 reportid += object->num_report_ids *
1636 mxt_obj_instances(object);
1637 max_id = reportid - 1;
1638 } else {
1639 min_id = 0;
1640 max_id = 0;
1641 }
1642
1643 dev_dbg(&data->client->dev,
1644 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1645 object->type, object->start_address,
1646 mxt_obj_size(object), mxt_obj_instances(object),
1647 min_id, max_id);
1648
1649 switch (object->type) {
1650 case MXT_GEN_MESSAGE_T5:
1651 if (data->info.family_id == 0x80 &&
1652 data->info.version < 0x20) {
1653 /*
1654 * On mXT224 firmware versions prior to V2.0
1655 * read and discard unused CRC byte otherwise
1656 * DMA reads are misaligned.
1657 */
1658 data->T5_msg_size = mxt_obj_size(object);
1659 } else {
1660 /* CRC not enabled, so skip last byte */
1661 data->T5_msg_size = mxt_obj_size(object) - 1;
1662 }
1663 data->T5_address = object->start_address;
1664 break;
1665 case MXT_GEN_COMMAND_T6:
1666 data->T6_reportid = min_id;
1667 data->T6_address = object->start_address;
1668 break;
1669 case MXT_GEN_POWER_T7:
1670 data->T7_address = object->start_address;
1671 break;
1672 case MXT_TOUCH_MULTI_T9:
1673 data->multitouch = MXT_TOUCH_MULTI_T9;
1674 data->T9_reportid_min = min_id;
1675 data->T9_reportid_max = max_id;
1676 data->num_touchids = object->num_report_ids
1677 * mxt_obj_instances(object);
1678 break;
1679 case MXT_SPT_MESSAGECOUNT_T44:
1680 data->T44_address = object->start_address;
1681 break;
1682 case MXT_SPT_GPIOPWM_T19:
1683 data->T19_reportid = min_id;
1684 break;
1685 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1686 data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1687 data->T100_reportid_min = min_id;
1688 data->T100_reportid_max = max_id;
1689 /* first two report IDs reserved */
1690 data->num_touchids = object->num_report_ids - 2;
1691 break;
1692 }
1693
1694 end_address = object->start_address
1695 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1696
1697 if (end_address >= data->mem_size)
1698 data->mem_size = end_address + 1;
1699 }
1700
1701 /* Store maximum reportid */
1702 data->max_reportid = reportid;
1703
1704 /* If T44 exists, T5 position has to be directly after */
1705 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1706 dev_err(&client->dev, "Invalid T44 position\n");
1707 error = -EINVAL;
1708 goto free_object_table;
1709 }
1710
1711 data->msg_buf = kcalloc(data->max_reportid,
1712 data->T5_msg_size, GFP_KERNEL);
1713 if (!data->msg_buf) {
1714 dev_err(&client->dev, "Failed to allocate message buffer\n");
1715 error = -ENOMEM;
1716 goto free_object_table;
1717 }
1718
1719 data->object_table = object_table;
1720
1721 return 0;
1722
1723 free_object_table:
1724 mxt_free_object_table(data);
1725 return error;
1726 }
1727
1728 static int mxt_read_t9_resolution(struct mxt_data *data)
1729 {
1730 struct i2c_client *client = data->client;
1731 int error;
1732 struct t9_range range;
1733 unsigned char orient;
1734 struct mxt_object *object;
1735
1736 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1737 if (!object)
1738 return -EINVAL;
1739
1740 error = __mxt_read_reg(client,
1741 object->start_address + MXT_T9_XSIZE,
1742 sizeof(data->xsize), &data->xsize);
1743 if (error)
1744 return error;
1745
1746 error = __mxt_read_reg(client,
1747 object->start_address + MXT_T9_YSIZE,
1748 sizeof(data->ysize), &data->ysize);
1749 if (error)
1750 return error;
1751
1752 error = __mxt_read_reg(client,
1753 object->start_address + MXT_T9_RANGE,
1754 sizeof(range), &range);
1755 if (error)
1756 return error;
1757
1758 data->max_x = get_unaligned_le16(&range.x);
1759 data->max_y = get_unaligned_le16(&range.y);
1760
1761 error = __mxt_read_reg(client,
1762 object->start_address + MXT_T9_ORIENT,
1763 1, &orient);
1764 if (error)
1765 return error;
1766
1767 data->xy_switch = orient & MXT_T9_ORIENT_SWITCH;
1768 data->invertx = orient & MXT_T9_ORIENT_INVERTX;
1769 data->inverty = orient & MXT_T9_ORIENT_INVERTY;
1770
1771 return 0;
1772 }
1773
1774 static int mxt_read_t100_config(struct mxt_data *data)
1775 {
1776 struct i2c_client *client = data->client;
1777 int error;
1778 struct mxt_object *object;
1779 u16 range_x, range_y;
1780 u8 cfg, tchaux;
1781 u8 aux;
1782
1783 object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1784 if (!object)
1785 return -EINVAL;
1786
1787 /* read touchscreen dimensions */
1788 error = __mxt_read_reg(client,
1789 object->start_address + MXT_T100_XRANGE,
1790 sizeof(range_x), &range_x);
1791 if (error)
1792 return error;
1793
1794 data->max_x = get_unaligned_le16(&range_x);
1795
1796 error = __mxt_read_reg(client,
1797 object->start_address + MXT_T100_YRANGE,
1798 sizeof(range_y), &range_y);
1799 if (error)
1800 return error;
1801
1802 data->max_y = get_unaligned_le16(&range_y);
1803
1804 error = __mxt_read_reg(client,
1805 object->start_address + MXT_T100_XSIZE,
1806 sizeof(data->xsize), &data->xsize);
1807 if (error)
1808 return error;
1809
1810 error = __mxt_read_reg(client,
1811 object->start_address + MXT_T100_YSIZE,
1812 sizeof(data->ysize), &data->ysize);
1813 if (error)
1814 return error;
1815
1816 /* read orientation config */
1817 error = __mxt_read_reg(client,
1818 object->start_address + MXT_T100_CFG1,
1819 1, &cfg);
1820 if (error)
1821 return error;
1822
1823 data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY;
1824 data->invertx = cfg & MXT_T100_CFG_INVERTX;
1825 data->inverty = cfg & MXT_T100_CFG_INVERTY;
1826
1827 /* allocate aux bytes */
1828 error = __mxt_read_reg(client,
1829 object->start_address + MXT_T100_TCHAUX,
1830 1, &tchaux);
1831 if (error)
1832 return error;
1833
1834 aux = 6;
1835
1836 if (tchaux & MXT_T100_TCHAUX_VECT)
1837 data->t100_aux_vect = aux++;
1838
1839 if (tchaux & MXT_T100_TCHAUX_AMPL)
1840 data->t100_aux_ampl = aux++;
1841
1842 if (tchaux & MXT_T100_TCHAUX_AREA)
1843 data->t100_aux_area = aux++;
1844
1845 dev_dbg(&client->dev,
1846 "T100 aux mappings vect:%u ampl:%u area:%u\n",
1847 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
1848
1849 return 0;
1850 }
1851
1852 static int mxt_input_open(struct input_dev *dev);
1853 static void mxt_input_close(struct input_dev *dev);
1854
1855 static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
1856 struct mxt_data *data)
1857 {
1858 const struct mxt_platform_data *pdata = data->pdata;
1859 int i;
1860
1861 input_dev->name = "Atmel maXTouch Touchpad";
1862
1863 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1864
1865 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1866 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1867 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1868 MXT_PIXELS_PER_MM);
1869 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1870 MXT_PIXELS_PER_MM);
1871
1872 for (i = 0; i < pdata->t19_num_keys; i++)
1873 if (pdata->t19_keymap[i] != KEY_RESERVED)
1874 input_set_capability(input_dev, EV_KEY,
1875 pdata->t19_keymap[i]);
1876 }
1877
1878 static int mxt_initialize_input_device(struct mxt_data *data)
1879 {
1880 const struct mxt_platform_data *pdata = data->pdata;
1881 struct device *dev = &data->client->dev;
1882 struct input_dev *input_dev;
1883 int error;
1884 unsigned int num_mt_slots;
1885 unsigned int mt_flags = 0;
1886
1887 switch (data->multitouch) {
1888 case MXT_TOUCH_MULTI_T9:
1889 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1890 error = mxt_read_t9_resolution(data);
1891 if (error)
1892 dev_warn(dev, "Failed to initialize T9 resolution\n");
1893 break;
1894
1895 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1896 num_mt_slots = data->num_touchids;
1897 error = mxt_read_t100_config(data);
1898 if (error)
1899 dev_warn(dev, "Failed to read T100 config\n");
1900 break;
1901
1902 default:
1903 dev_err(dev, "Invalid multitouch object\n");
1904 return -EINVAL;
1905 }
1906
1907 /* Handle default values and orientation switch */
1908 if (data->max_x == 0)
1909 data->max_x = 1023;
1910
1911 if (data->max_y == 0)
1912 data->max_y = 1023;
1913
1914 if (data->xy_switch)
1915 swap(data->max_x, data->max_y);
1916
1917 dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1918
1919 /* Register input device */
1920 input_dev = input_allocate_device();
1921 if (!input_dev) {
1922 dev_err(dev, "Failed to allocate memory\n");
1923 return -ENOMEM;
1924 }
1925
1926 input_dev->name = "Atmel maXTouch Touchscreen";
1927 input_dev->phys = data->phys;
1928 input_dev->id.bustype = BUS_I2C;
1929 input_dev->dev.parent = dev;
1930 input_dev->open = mxt_input_open;
1931 input_dev->close = mxt_input_close;
1932
1933 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
1934
1935 /* For single touch */
1936 input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
1937 input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
1938
1939 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1940 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1941 data->t100_aux_ampl)) {
1942 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
1943 }
1944
1945 /* If device has buttons we assume it is a touchpad */
1946 if (pdata->t19_num_keys) {
1947 mxt_set_up_as_touchpad(input_dev, data);
1948 mt_flags |= INPUT_MT_POINTER;
1949 } else {
1950 mt_flags |= INPUT_MT_DIRECT;
1951 }
1952
1953 /* For multi touch */
1954 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1955 if (error) {
1956 dev_err(dev, "Error %d initialising slots\n", error);
1957 goto err_free_mem;
1958 }
1959
1960 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
1961 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
1962 0, MT_TOOL_MAX, 0, 0);
1963 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
1964 MXT_DISTANCE_ACTIVE_TOUCH,
1965 MXT_DISTANCE_HOVERING,
1966 0, 0);
1967 }
1968
1969 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1970 0, data->max_x, 0, 0);
1971 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1972 0, data->max_y, 0, 0);
1973
1974 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1975 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1976 data->t100_aux_area)) {
1977 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1978 0, MXT_MAX_AREA, 0, 0);
1979 }
1980
1981 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1982 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1983 data->t100_aux_ampl)) {
1984 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1985 0, 255, 0, 0);
1986 }
1987
1988 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1989 data->t100_aux_vect) {
1990 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1991 0, 255, 0, 0);
1992 }
1993
1994 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1995 data->t100_aux_ampl) {
1996 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1997 0, 255, 0, 0);
1998 }
1999
2000 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2001 data->t100_aux_vect) {
2002 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
2003 0, 255, 0, 0);
2004 }
2005
2006 input_set_drvdata(input_dev, data);
2007
2008 error = input_register_device(input_dev);
2009 if (error) {
2010 dev_err(dev, "Error %d registering input device\n", error);
2011 goto err_free_mem;
2012 }
2013
2014 data->input_dev = input_dev;
2015
2016 return 0;
2017
2018 err_free_mem:
2019 input_free_device(input_dev);
2020 return error;
2021 }
2022
2023 static int mxt_configure_objects(struct mxt_data *data,
2024 const struct firmware *cfg);
2025
2026 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
2027 {
2028 mxt_configure_objects(ctx, cfg);
2029 release_firmware(cfg);
2030 }
2031
2032 static int mxt_initialize(struct mxt_data *data)
2033 {
2034 struct i2c_client *client = data->client;
2035 int recovery_attempts = 0;
2036 int error;
2037
2038 while (1) {
2039 error = mxt_get_info(data);
2040 if (!error)
2041 break;
2042
2043 /* Check bootloader state */
2044 error = mxt_probe_bootloader(data, false);
2045 if (error) {
2046 dev_info(&client->dev, "Trying alternate bootloader address\n");
2047 error = mxt_probe_bootloader(data, true);
2048 if (error) {
2049 /* Chip is not in appmode or bootloader mode */
2050 return error;
2051 }
2052 }
2053
2054 /* OK, we are in bootloader, see if we can recover */
2055 if (++recovery_attempts > 1) {
2056 dev_err(&client->dev, "Could not recover from bootloader mode\n");
2057 /*
2058 * We can reflash from this state, so do not
2059 * abort initialization.
2060 */
2061 data->in_bootloader = true;
2062 return 0;
2063 }
2064
2065 /* Attempt to exit bootloader into app mode */
2066 mxt_send_bootloader_cmd(data, false);
2067 msleep(MXT_FW_RESET_TIME);
2068 }
2069
2070 /* Get object table information */
2071 error = mxt_get_object_table(data);
2072 if (error) {
2073 dev_err(&client->dev, "Error %d reading object table\n", error);
2074 return error;
2075 }
2076
2077 error = mxt_acquire_irq(data);
2078 if (error)
2079 goto err_free_object_table;
2080
2081 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
2082 &client->dev, GFP_KERNEL, data,
2083 mxt_config_cb);
2084 if (error) {
2085 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
2086 error);
2087 goto err_free_object_table;
2088 }
2089
2090 return 0;
2091
2092 err_free_object_table:
2093 mxt_free_object_table(data);
2094 return error;
2095 }
2096
2097 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2098 {
2099 struct device *dev = &data->client->dev;
2100 int error;
2101 struct t7_config *new_config;
2102 struct t7_config deepsleep = { .active = 0, .idle = 0 };
2103
2104 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2105 new_config = &deepsleep;
2106 else
2107 new_config = &data->t7_cfg;
2108
2109 error = __mxt_write_reg(data->client, data->T7_address,
2110 sizeof(data->t7_cfg), new_config);
2111 if (error)
2112 return error;
2113
2114 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2115 new_config->active, new_config->idle);
2116
2117 return 0;
2118 }
2119
2120 static int mxt_init_t7_power_cfg(struct mxt_data *data)
2121 {
2122 struct device *dev = &data->client->dev;
2123 int error;
2124 bool retry = false;
2125
2126 recheck:
2127 error = __mxt_read_reg(data->client, data->T7_address,
2128 sizeof(data->t7_cfg), &data->t7_cfg);
2129 if (error)
2130 return error;
2131
2132 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2133 if (!retry) {
2134 dev_dbg(dev, "T7 cfg zero, resetting\n");
2135 mxt_soft_reset(data);
2136 retry = true;
2137 goto recheck;
2138 } else {
2139 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2140 data->t7_cfg.active = 20;
2141 data->t7_cfg.idle = 100;
2142 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2143 }
2144 }
2145
2146 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2147 data->t7_cfg.active, data->t7_cfg.idle);
2148 return 0;
2149 }
2150
2151 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
2152 static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
2153 unsigned int y)
2154 {
2155 struct mxt_info *info = &data->info;
2156 struct mxt_dbg *dbg = &data->dbg;
2157 unsigned int ofs, page;
2158 unsigned int col = 0;
2159 unsigned int col_width;
2160
2161 if (info->family_id == MXT_FAMILY_1386) {
2162 col_width = info->matrix_ysize / MXT1386_COLUMNS;
2163 col = y / col_width;
2164 y = y % col_width;
2165 } else {
2166 col_width = info->matrix_ysize;
2167 }
2168
2169 ofs = (y + (x * col_width)) * sizeof(u16);
2170 page = ofs / MXT_DIAGNOSTIC_SIZE;
2171 ofs %= MXT_DIAGNOSTIC_SIZE;
2172
2173 if (info->family_id == MXT_FAMILY_1386)
2174 page += col * MXT1386_PAGES_PER_COLUMN;
2175
2176 return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
2177 }
2178
2179 static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf)
2180 {
2181 struct mxt_dbg *dbg = &data->dbg;
2182 unsigned int x = 0;
2183 unsigned int y = 0;
2184 unsigned int i, rx, ry;
2185
2186 for (i = 0; i < dbg->t37_nodes; i++) {
2187 /* Handle orientation */
2188 rx = data->xy_switch ? y : x;
2189 ry = data->xy_switch ? x : y;
2190 rx = data->invertx ? (data->xsize - 1 - rx) : rx;
2191 ry = data->inverty ? (data->ysize - 1 - ry) : ry;
2192
2193 outbuf[i] = mxt_get_debug_value(data, rx, ry);
2194
2195 /* Next value */
2196 if (++x >= (data->xy_switch ? data->ysize : data->xsize)) {
2197 x = 0;
2198 y++;
2199 }
2200 }
2201
2202 return 0;
2203 }
2204
2205 static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode,
2206 u16 *outbuf)
2207 {
2208 struct mxt_dbg *dbg = &data->dbg;
2209 int retries = 0;
2210 int page;
2211 int ret;
2212 u8 cmd = mode;
2213 struct t37_debug *p;
2214 u8 cmd_poll;
2215
2216 for (page = 0; page < dbg->t37_pages; page++) {
2217 p = dbg->t37_buf + page;
2218
2219 ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
2220 cmd);
2221 if (ret)
2222 return ret;
2223
2224 retries = 0;
2225 msleep(20);
2226 wait_cmd:
2227 /* Read back command byte */
2228 ret = __mxt_read_reg(data->client, dbg->diag_cmd_address,
2229 sizeof(cmd_poll), &cmd_poll);
2230 if (ret)
2231 return ret;
2232
2233 /* Field is cleared once the command has been processed */
2234 if (cmd_poll) {
2235 if (retries++ > 100)
2236 return -EINVAL;
2237
2238 msleep(20);
2239 goto wait_cmd;
2240 }
2241
2242 /* Read T37 page */
2243 ret = __mxt_read_reg(data->client, dbg->t37_address,
2244 sizeof(struct t37_debug), p);
2245 if (ret)
2246 return ret;
2247
2248 if (p->mode != mode || p->page != page) {
2249 dev_err(&data->client->dev, "T37 page mismatch\n");
2250 return -EINVAL;
2251 }
2252
2253 dev_dbg(&data->client->dev, "%s page:%d retries:%d\n",
2254 __func__, page, retries);
2255
2256 /* For remaining pages, write PAGEUP rather than mode */
2257 cmd = MXT_DIAGNOSTIC_PAGEUP;
2258 }
2259
2260 return mxt_convert_debug_pages(data, outbuf);
2261 }
2262
2263 static int mxt_queue_setup(struct vb2_queue *q,
2264 unsigned int *nbuffers, unsigned int *nplanes,
2265 unsigned int sizes[], struct device *alloc_devs[])
2266 {
2267 struct mxt_data *data = q->drv_priv;
2268 size_t size = data->dbg.t37_nodes * sizeof(u16);
2269
2270 if (*nplanes)
2271 return sizes[0] < size ? -EINVAL : 0;
2272
2273 *nplanes = 1;
2274 sizes[0] = size;
2275
2276 return 0;
2277 }
2278
2279 static void mxt_buffer_queue(struct vb2_buffer *vb)
2280 {
2281 struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue);
2282 u16 *ptr;
2283 int ret;
2284 u8 mode;
2285
2286 ptr = vb2_plane_vaddr(vb, 0);
2287 if (!ptr) {
2288 dev_err(&data->client->dev, "Error acquiring frame ptr\n");
2289 goto fault;
2290 }
2291
2292 switch (data->dbg.input) {
2293 case MXT_V4L_INPUT_DELTAS:
2294 default:
2295 mode = MXT_DIAGNOSTIC_DELTAS;
2296 break;
2297
2298 case MXT_V4L_INPUT_REFS:
2299 mode = MXT_DIAGNOSTIC_REFS;
2300 break;
2301 }
2302
2303 ret = mxt_read_diagnostic_debug(data, mode, ptr);
2304 if (ret)
2305 goto fault;
2306
2307 vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16));
2308 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
2309 return;
2310
2311 fault:
2312 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
2313 }
2314
2315 /* V4L2 structures */
2316 static const struct vb2_ops mxt_queue_ops = {
2317 .queue_setup = mxt_queue_setup,
2318 .buf_queue = mxt_buffer_queue,
2319 .wait_prepare = vb2_ops_wait_prepare,
2320 .wait_finish = vb2_ops_wait_finish,
2321 };
2322
2323 static const struct vb2_queue mxt_queue = {
2324 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2325 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
2326 .buf_struct_size = sizeof(struct mxt_vb2_buffer),
2327 .ops = &mxt_queue_ops,
2328 .mem_ops = &vb2_vmalloc_memops,
2329 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
2330 .min_buffers_needed = 1,
2331 };
2332
2333 static int mxt_vidioc_querycap(struct file *file, void *priv,
2334 struct v4l2_capability *cap)
2335 {
2336 struct mxt_data *data = video_drvdata(file);
2337
2338 strlcpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver));
2339 strlcpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card));
2340 snprintf(cap->bus_info, sizeof(cap->bus_info),
2341 "I2C:%s", dev_name(&data->client->dev));
2342 return 0;
2343 }
2344
2345 static int mxt_vidioc_enum_input(struct file *file, void *priv,
2346 struct v4l2_input *i)
2347 {
2348 if (i->index >= MXT_V4L_INPUT_MAX)
2349 return -EINVAL;
2350
2351 i->type = V4L2_INPUT_TYPE_TOUCH;
2352
2353 switch (i->index) {
2354 case MXT_V4L_INPUT_REFS:
2355 strlcpy(i->name, "Mutual Capacitance References",
2356 sizeof(i->name));
2357 break;
2358 case MXT_V4L_INPUT_DELTAS:
2359 strlcpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name));
2360 break;
2361 }
2362
2363 return 0;
2364 }
2365
2366 static int mxt_set_input(struct mxt_data *data, unsigned int i)
2367 {
2368 struct v4l2_pix_format *f = &data->dbg.format;
2369
2370 if (i >= MXT_V4L_INPUT_MAX)
2371 return -EINVAL;
2372
2373 if (i == MXT_V4L_INPUT_DELTAS)
2374 f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2375 else
2376 f->pixelformat = V4L2_TCH_FMT_TU16;
2377
2378 f->width = data->xy_switch ? data->ysize : data->xsize;
2379 f->height = data->xy_switch ? data->xsize : data->ysize;
2380 f->field = V4L2_FIELD_NONE;
2381 f->colorspace = V4L2_COLORSPACE_RAW;
2382 f->bytesperline = f->width * sizeof(u16);
2383 f->sizeimage = f->width * f->height * sizeof(u16);
2384
2385 data->dbg.input = i;
2386
2387 return 0;
2388 }
2389
2390 static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i)
2391 {
2392 return mxt_set_input(video_drvdata(file), i);
2393 }
2394
2395 static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
2396 {
2397 struct mxt_data *data = video_drvdata(file);
2398
2399 *i = data->dbg.input;
2400
2401 return 0;
2402 }
2403
2404 static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f)
2405 {
2406 struct mxt_data *data = video_drvdata(file);
2407
2408 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2409 f->fmt.pix = data->dbg.format;
2410
2411 return 0;
2412 }
2413
2414 static int mxt_vidioc_enum_fmt(struct file *file, void *priv,
2415 struct v4l2_fmtdesc *fmt)
2416 {
2417 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2418 return -EINVAL;
2419
2420 switch (fmt->index) {
2421 case 0:
2422 fmt->pixelformat = V4L2_TCH_FMT_TU16;
2423 break;
2424
2425 case 1:
2426 fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2427 break;
2428
2429 default:
2430 return -EINVAL;
2431 }
2432
2433 return 0;
2434 }
2435
2436 static int mxt_vidioc_g_parm(struct file *file, void *fh,
2437 struct v4l2_streamparm *a)
2438 {
2439 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2440 return -EINVAL;
2441
2442 a->parm.capture.readbuffers = 1;
2443 a->parm.capture.timeperframe.numerator = 1;
2444 a->parm.capture.timeperframe.denominator = 10;
2445 return 0;
2446 }
2447
2448 static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = {
2449 .vidioc_querycap = mxt_vidioc_querycap,
2450
2451 .vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt,
2452 .vidioc_s_fmt_vid_cap = mxt_vidioc_fmt,
2453 .vidioc_g_fmt_vid_cap = mxt_vidioc_fmt,
2454 .vidioc_try_fmt_vid_cap = mxt_vidioc_fmt,
2455 .vidioc_g_parm = mxt_vidioc_g_parm,
2456
2457 .vidioc_enum_input = mxt_vidioc_enum_input,
2458 .vidioc_g_input = mxt_vidioc_g_input,
2459 .vidioc_s_input = mxt_vidioc_s_input,
2460
2461 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2462 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2463 .vidioc_querybuf = vb2_ioctl_querybuf,
2464 .vidioc_qbuf = vb2_ioctl_qbuf,
2465 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2466 .vidioc_expbuf = vb2_ioctl_expbuf,
2467
2468 .vidioc_streamon = vb2_ioctl_streamon,
2469 .vidioc_streamoff = vb2_ioctl_streamoff,
2470 };
2471
2472 static const struct video_device mxt_video_device = {
2473 .name = "Atmel maxTouch",
2474 .fops = &mxt_video_fops,
2475 .ioctl_ops = &mxt_video_ioctl_ops,
2476 .release = video_device_release_empty,
2477 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
2478 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
2479 };
2480
2481 static void mxt_debug_init(struct mxt_data *data)
2482 {
2483 struct mxt_info *info = &data->info;
2484 struct mxt_dbg *dbg = &data->dbg;
2485 struct mxt_object *object;
2486 int error;
2487
2488 object = mxt_get_object(data, MXT_GEN_COMMAND_T6);
2489 if (!object)
2490 goto error;
2491
2492 dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC;
2493
2494 object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37);
2495 if (!object)
2496 goto error;
2497
2498 if (mxt_obj_size(object) != sizeof(struct t37_debug)) {
2499 dev_warn(&data->client->dev, "Bad T37 size");
2500 goto error;
2501 }
2502
2503 dbg->t37_address = object->start_address;
2504
2505 /* Calculate size of data and allocate buffer */
2506 dbg->t37_nodes = data->xsize * data->ysize;
2507
2508 if (info->family_id == MXT_FAMILY_1386)
2509 dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN;
2510 else
2511 dbg->t37_pages = DIV_ROUND_UP(data->xsize *
2512 data->info.matrix_ysize *
2513 sizeof(u16),
2514 sizeof(dbg->t37_buf->data));
2515
2516 dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
2517 sizeof(struct t37_debug), GFP_KERNEL);
2518 if (!dbg->t37_buf)
2519 goto error;
2520
2521 /* init channel to zero */
2522 mxt_set_input(data, 0);
2523
2524 /* register video device */
2525 snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s", "atmel_mxt_ts");
2526 error = v4l2_device_register(&data->client->dev, &dbg->v4l2);
2527 if (error)
2528 goto error;
2529
2530 /* initialize the queue */
2531 mutex_init(&dbg->lock);
2532 dbg->queue = mxt_queue;
2533 dbg->queue.drv_priv = data;
2534 dbg->queue.lock = &dbg->lock;
2535 dbg->queue.dev = &data->client->dev;
2536
2537 error = vb2_queue_init(&dbg->queue);
2538 if (error)
2539 goto error_unreg_v4l2;
2540
2541 dbg->vdev = mxt_video_device;
2542 dbg->vdev.v4l2_dev = &dbg->v4l2;
2543 dbg->vdev.lock = &dbg->lock;
2544 dbg->vdev.vfl_dir = VFL_DIR_RX;
2545 dbg->vdev.queue = &dbg->queue;
2546 video_set_drvdata(&dbg->vdev, data);
2547
2548 error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1);
2549 if (error)
2550 goto error_unreg_v4l2;
2551
2552 return;
2553
2554 error_unreg_v4l2:
2555 v4l2_device_unregister(&dbg->v4l2);
2556 error:
2557 dev_warn(&data->client->dev, "Error initializing T37\n");
2558 }
2559 #else
2560 static void mxt_debug_init(struct mxt_data *data)
2561 {
2562 }
2563 #endif
2564
2565 static int mxt_configure_objects(struct mxt_data *data,
2566 const struct firmware *cfg)
2567 {
2568 struct device *dev = &data->client->dev;
2569 struct mxt_info *info = &data->info;
2570 int error;
2571
2572 error = mxt_init_t7_power_cfg(data);
2573 if (error) {
2574 dev_err(dev, "Failed to initialize power cfg\n");
2575 return error;
2576 }
2577
2578 if (cfg) {
2579 error = mxt_update_cfg(data, cfg);
2580 if (error)
2581 dev_warn(dev, "Error %d updating config\n", error);
2582 }
2583
2584 if (data->multitouch) {
2585 error = mxt_initialize_input_device(data);
2586 if (error)
2587 return error;
2588 } else {
2589 dev_warn(dev, "No touch object detected\n");
2590 }
2591
2592 mxt_debug_init(data);
2593
2594 dev_info(dev,
2595 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
2596 info->family_id, info->variant_id, info->version >> 4,
2597 info->version & 0xf, info->build, info->object_num);
2598
2599 return 0;
2600 }
2601
2602 /* Firmware Version is returned as Major.Minor.Build */
2603 static ssize_t mxt_fw_version_show(struct device *dev,
2604 struct device_attribute *attr, char *buf)
2605 {
2606 struct mxt_data *data = dev_get_drvdata(dev);
2607 struct mxt_info *info = &data->info;
2608 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
2609 info->version >> 4, info->version & 0xf, info->build);
2610 }
2611
2612 /* Hardware Version is returned as FamilyID.VariantID */
2613 static ssize_t mxt_hw_version_show(struct device *dev,
2614 struct device_attribute *attr, char *buf)
2615 {
2616 struct mxt_data *data = dev_get_drvdata(dev);
2617 struct mxt_info *info = &data->info;
2618 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
2619 info->family_id, info->variant_id);
2620 }
2621
2622 static ssize_t mxt_show_instance(char *buf, int count,
2623 struct mxt_object *object, int instance,
2624 const u8 *val)
2625 {
2626 int i;
2627
2628 if (mxt_obj_instances(object) > 1)
2629 count += scnprintf(buf + count, PAGE_SIZE - count,
2630 "Instance %u\n", instance);
2631
2632 for (i = 0; i < mxt_obj_size(object); i++)
2633 count += scnprintf(buf + count, PAGE_SIZE - count,
2634 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
2635 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
2636
2637 return count;
2638 }
2639
2640 static ssize_t mxt_object_show(struct device *dev,
2641 struct device_attribute *attr, char *buf)
2642 {
2643 struct mxt_data *data = dev_get_drvdata(dev);
2644 struct mxt_object *object;
2645 int count = 0;
2646 int i, j;
2647 int error;
2648 u8 *obuf;
2649
2650 /* Pre-allocate buffer large enough to hold max sized object. */
2651 obuf = kmalloc(256, GFP_KERNEL);
2652 if (!obuf)
2653 return -ENOMEM;
2654
2655 error = 0;
2656 for (i = 0; i < data->info.object_num; i++) {
2657 object = data->object_table + i;
2658
2659 if (!mxt_object_readable(object->type))
2660 continue;
2661
2662 count += scnprintf(buf + count, PAGE_SIZE - count,
2663 "T%u:\n", object->type);
2664
2665 for (j = 0; j < mxt_obj_instances(object); j++) {
2666 u16 size = mxt_obj_size(object);
2667 u16 addr = object->start_address + j * size;
2668
2669 error = __mxt_read_reg(data->client, addr, size, obuf);
2670 if (error)
2671 goto done;
2672
2673 count = mxt_show_instance(buf, count, object, j, obuf);
2674 }
2675 }
2676
2677 done:
2678 kfree(obuf);
2679 return error ?: count;
2680 }
2681
2682 static int mxt_check_firmware_format(struct device *dev,
2683 const struct firmware *fw)
2684 {
2685 unsigned int pos = 0;
2686 char c;
2687
2688 while (pos < fw->size) {
2689 c = *(fw->data + pos);
2690
2691 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2692 return 0;
2693
2694 pos++;
2695 }
2696
2697 /*
2698 * To convert file try:
2699 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2700 */
2701 dev_err(dev, "Aborting: firmware file must be in binary format\n");
2702
2703 return -EINVAL;
2704 }
2705
2706 static int mxt_load_fw(struct device *dev, const char *fn)
2707 {
2708 struct mxt_data *data = dev_get_drvdata(dev);
2709 const struct firmware *fw = NULL;
2710 unsigned int frame_size;
2711 unsigned int pos = 0;
2712 unsigned int retry = 0;
2713 unsigned int frame = 0;
2714 int ret;
2715
2716 ret = request_firmware(&fw, fn, dev);
2717 if (ret) {
2718 dev_err(dev, "Unable to open firmware %s\n", fn);
2719 return ret;
2720 }
2721
2722 /* Check for incorrect enc file */
2723 ret = mxt_check_firmware_format(dev, fw);
2724 if (ret)
2725 goto release_firmware;
2726
2727 if (!data->in_bootloader) {
2728 /* Change to the bootloader mode */
2729 data->in_bootloader = true;
2730
2731 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2732 MXT_BOOT_VALUE, false);
2733 if (ret)
2734 goto release_firmware;
2735
2736 msleep(MXT_RESET_TIME);
2737
2738 /* Do not need to scan since we know family ID */
2739 ret = mxt_lookup_bootloader_address(data, 0);
2740 if (ret)
2741 goto release_firmware;
2742
2743 mxt_free_input_device(data);
2744 mxt_free_object_table(data);
2745 } else {
2746 enable_irq(data->irq);
2747 }
2748
2749 reinit_completion(&data->bl_completion);
2750
2751 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2752 if (ret) {
2753 /* Bootloader may still be unlocked from previous attempt */
2754 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2755 if (ret)
2756 goto disable_irq;
2757 } else {
2758 dev_info(dev, "Unlocking bootloader\n");
2759
2760 /* Unlock bootloader */
2761 ret = mxt_send_bootloader_cmd(data, true);
2762 if (ret)
2763 goto disable_irq;
2764 }
2765
2766 while (pos < fw->size) {
2767 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
2768 if (ret)
2769 goto disable_irq;
2770
2771 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2772
2773 /* Take account of CRC bytes */
2774 frame_size += 2;
2775
2776 /* Write one frame to device */
2777 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2778 if (ret)
2779 goto disable_irq;
2780
2781 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
2782 if (ret) {
2783 retry++;
2784
2785 /* Back off by 20ms per retry */
2786 msleep(retry * 20);
2787
2788 if (retry > 20) {
2789 dev_err(dev, "Retry count exceeded\n");
2790 goto disable_irq;
2791 }
2792 } else {
2793 retry = 0;
2794 pos += frame_size;
2795 frame++;
2796 }
2797
2798 if (frame % 50 == 0)
2799 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2800 frame, pos, fw->size);
2801 }
2802
2803 /* Wait for flash. */
2804 ret = mxt_wait_for_completion(data, &data->bl_completion,
2805 MXT_FW_RESET_TIME);
2806 if (ret)
2807 goto disable_irq;
2808
2809 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2810
2811 /*
2812 * Wait for device to reset. Some bootloader versions do not assert
2813 * the CHG line after bootloading has finished, so ignore potential
2814 * errors.
2815 */
2816 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
2817
2818 data->in_bootloader = false;
2819
2820 disable_irq:
2821 disable_irq(data->irq);
2822 release_firmware:
2823 release_firmware(fw);
2824 return ret;
2825 }
2826
2827 static ssize_t mxt_update_fw_store(struct device *dev,
2828 struct device_attribute *attr,
2829 const char *buf, size_t count)
2830 {
2831 struct mxt_data *data = dev_get_drvdata(dev);
2832 int error;
2833
2834 error = mxt_load_fw(dev, MXT_FW_NAME);
2835 if (error) {
2836 dev_err(dev, "The firmware update failed(%d)\n", error);
2837 count = error;
2838 } else {
2839 dev_info(dev, "The firmware update succeeded\n");
2840
2841 error = mxt_initialize(data);
2842 if (error)
2843 return error;
2844 }
2845
2846 return count;
2847 }
2848
2849 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2850 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
2851 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2852 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
2853
2854 static struct attribute *mxt_attrs[] = {
2855 &dev_attr_fw_version.attr,
2856 &dev_attr_hw_version.attr,
2857 &dev_attr_object.attr,
2858 &dev_attr_update_fw.attr,
2859 NULL
2860 };
2861
2862 static const struct attribute_group mxt_attr_group = {
2863 .attrs = mxt_attrs,
2864 };
2865
2866 static void mxt_start(struct mxt_data *data)
2867 {
2868 switch (data->pdata->suspend_mode) {
2869 case MXT_SUSPEND_T9_CTRL:
2870 mxt_soft_reset(data);
2871
2872 /* Touch enable */
2873 /* 0x83 = SCANEN | RPTEN | ENABLE */
2874 mxt_write_object(data,
2875 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
2876 break;
2877
2878 case MXT_SUSPEND_DEEP_SLEEP:
2879 default:
2880 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2881
2882 /* Recalibrate since chip has been in deep sleep */
2883 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
2884 break;
2885 }
2886
2887 }
2888
2889 static void mxt_stop(struct mxt_data *data)
2890 {
2891 switch (data->pdata->suspend_mode) {
2892 case MXT_SUSPEND_T9_CTRL:
2893 /* Touch disable */
2894 mxt_write_object(data,
2895 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
2896 break;
2897
2898 case MXT_SUSPEND_DEEP_SLEEP:
2899 default:
2900 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
2901 break;
2902 }
2903 }
2904
2905 static int mxt_input_open(struct input_dev *dev)
2906 {
2907 struct mxt_data *data = input_get_drvdata(dev);
2908
2909 mxt_start(data);
2910
2911 return 0;
2912 }
2913
2914 static void mxt_input_close(struct input_dev *dev)
2915 {
2916 struct mxt_data *data = input_get_drvdata(dev);
2917
2918 mxt_stop(data);
2919 }
2920
2921 #ifdef CONFIG_OF
2922 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2923 {
2924 struct mxt_platform_data *pdata;
2925 struct device_node *np = client->dev.of_node;
2926 u32 *keymap;
2927 int proplen, ret;
2928
2929 if (!np)
2930 return ERR_PTR(-ENOENT);
2931
2932 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
2933 if (!pdata)
2934 return ERR_PTR(-ENOMEM);
2935
2936 if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
2937 pdata->t19_num_keys = proplen / sizeof(u32);
2938
2939 keymap = devm_kzalloc(&client->dev,
2940 pdata->t19_num_keys * sizeof(keymap[0]),
2941 GFP_KERNEL);
2942 if (!keymap)
2943 return ERR_PTR(-ENOMEM);
2944
2945 ret = of_property_read_u32_array(np, "linux,gpio-keymap",
2946 keymap, pdata->t19_num_keys);
2947 if (ret)
2948 dev_warn(&client->dev,
2949 "Couldn't read linux,gpio-keymap: %d\n", ret);
2950
2951 pdata->t19_keymap = keymap;
2952 }
2953
2954 pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
2955
2956 return pdata;
2957 }
2958 #else
2959 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2960 {
2961 return ERR_PTR(-ENOENT);
2962 }
2963 #endif
2964
2965 #ifdef CONFIG_ACPI
2966
2967 struct mxt_acpi_platform_data {
2968 const char *hid;
2969 struct mxt_platform_data pdata;
2970 };
2971
2972 static unsigned int samus_touchpad_buttons[] = {
2973 KEY_RESERVED,
2974 KEY_RESERVED,
2975 KEY_RESERVED,
2976 BTN_LEFT
2977 };
2978
2979 static struct mxt_acpi_platform_data samus_platform_data[] = {
2980 {
2981 /* Touchpad */
2982 .hid = "ATML0000",
2983 .pdata = {
2984 .t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons),
2985 .t19_keymap = samus_touchpad_buttons,
2986 },
2987 },
2988 {
2989 /* Touchscreen */
2990 .hid = "ATML0001",
2991 },
2992 { }
2993 };
2994
2995 static unsigned int chromebook_tp_buttons[] = {
2996 KEY_RESERVED,
2997 KEY_RESERVED,
2998 KEY_RESERVED,
2999 KEY_RESERVED,
3000 KEY_RESERVED,
3001 BTN_LEFT
3002 };
3003
3004 static struct mxt_acpi_platform_data chromebook_platform_data[] = {
3005 {
3006 /* Touchpad */
3007 .hid = "ATML0000",
3008 .pdata = {
3009 .t19_num_keys = ARRAY_SIZE(chromebook_tp_buttons),
3010 .t19_keymap = chromebook_tp_buttons,
3011 },
3012 },
3013 {
3014 /* Touchscreen */
3015 .hid = "ATML0001",
3016 },
3017 { }
3018 };
3019
3020 static const struct dmi_system_id mxt_dmi_table[] = {
3021 {
3022 /* 2015 Google Pixel */
3023 .ident = "Chromebook Pixel 2",
3024 .matches = {
3025 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
3026 DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
3027 },
3028 .driver_data = samus_platform_data,
3029 },
3030 {
3031 /* Other Google Chromebooks */
3032 .ident = "Chromebook",
3033 .matches = {
3034 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
3035 },
3036 .driver_data = chromebook_platform_data,
3037 },
3038 { }
3039 };
3040
3041 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
3042 {
3043 struct acpi_device *adev;
3044 const struct dmi_system_id *system_id;
3045 const struct mxt_acpi_platform_data *acpi_pdata;
3046
3047 /*
3048 * Ignore ACPI devices representing bootloader mode.
3049 *
3050 * This is a bit of a hack: Google Chromebook BIOS creates ACPI
3051 * devices for both application and bootloader modes, but we are
3052 * interested in application mode only (if device is in bootloader
3053 * mode we'll end up switching into application anyway). So far
3054 * application mode addresses were all above 0x40, so we'll use it
3055 * as a threshold.
3056 */
3057 if (client->addr < 0x40)
3058 return ERR_PTR(-ENXIO);
3059
3060 adev = ACPI_COMPANION(&client->dev);
3061 if (!adev)
3062 return ERR_PTR(-ENOENT);
3063
3064 system_id = dmi_first_match(mxt_dmi_table);
3065 if (!system_id)
3066 return ERR_PTR(-ENOENT);
3067
3068 acpi_pdata = system_id->driver_data;
3069 if (!acpi_pdata)
3070 return ERR_PTR(-ENOENT);
3071
3072 while (acpi_pdata->hid) {
3073 if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid))
3074 return &acpi_pdata->pdata;
3075
3076 acpi_pdata++;
3077 }
3078
3079 return ERR_PTR(-ENOENT);
3080 }
3081 #else
3082 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
3083 {
3084 return ERR_PTR(-ENOENT);
3085 }
3086 #endif
3087
3088 static const struct mxt_platform_data *
3089 mxt_get_platform_data(struct i2c_client *client)
3090 {
3091 const struct mxt_platform_data *pdata;
3092
3093 pdata = dev_get_platdata(&client->dev);
3094 if (pdata)
3095 return pdata;
3096
3097 pdata = mxt_parse_dt(client);
3098 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
3099 return pdata;
3100
3101 pdata = mxt_parse_acpi(client);
3102 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
3103 return pdata;
3104
3105 dev_err(&client->dev, "No platform data specified\n");
3106 return ERR_PTR(-EINVAL);
3107 }
3108
3109 static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
3110 {
3111 struct mxt_data *data;
3112 const struct mxt_platform_data *pdata;
3113 int error;
3114
3115 pdata = mxt_get_platform_data(client);
3116 if (IS_ERR(pdata))
3117 return PTR_ERR(pdata);
3118
3119 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
3120 if (!data) {
3121 dev_err(&client->dev, "Failed to allocate memory\n");
3122 return -ENOMEM;
3123 }
3124
3125 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
3126 client->adapter->nr, client->addr);
3127
3128 data->client = client;
3129 data->pdata = pdata;
3130 data->irq = client->irq;
3131 i2c_set_clientdata(client, data);
3132
3133 init_completion(&data->bl_completion);
3134 init_completion(&data->reset_completion);
3135 init_completion(&data->crc_completion);
3136
3137 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
3138 pdata->irqflags | IRQF_ONESHOT,
3139 client->name, data);
3140 if (error) {
3141 dev_err(&client->dev, "Failed to register interrupt\n");
3142 goto err_free_mem;
3143 }
3144
3145 disable_irq(client->irq);
3146
3147 error = mxt_initialize(data);
3148 if (error)
3149 goto err_free_irq;
3150
3151 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
3152 if (error) {
3153 dev_err(&client->dev, "Failure %d creating sysfs group\n",
3154 error);
3155 goto err_free_object;
3156 }
3157
3158 return 0;
3159
3160 err_free_object:
3161 mxt_free_input_device(data);
3162 mxt_free_object_table(data);
3163 err_free_irq:
3164 free_irq(client->irq, data);
3165 err_free_mem:
3166 kfree(data);
3167 return error;
3168 }
3169
3170 static int mxt_remove(struct i2c_client *client)
3171 {
3172 struct mxt_data *data = i2c_get_clientdata(client);
3173
3174 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
3175 free_irq(data->irq, data);
3176 mxt_free_input_device(data);
3177 mxt_free_object_table(data);
3178 kfree(data);
3179
3180 return 0;
3181 }
3182
3183 static int __maybe_unused mxt_suspend(struct device *dev)
3184 {
3185 struct i2c_client *client = to_i2c_client(dev);
3186 struct mxt_data *data = i2c_get_clientdata(client);
3187 struct input_dev *input_dev = data->input_dev;
3188
3189 if (!input_dev)
3190 return 0;
3191
3192 mutex_lock(&input_dev->mutex);
3193
3194 if (input_dev->users)
3195 mxt_stop(data);
3196
3197 mutex_unlock(&input_dev->mutex);
3198
3199 return 0;
3200 }
3201
3202 static int __maybe_unused mxt_resume(struct device *dev)
3203 {
3204 struct i2c_client *client = to_i2c_client(dev);
3205 struct mxt_data *data = i2c_get_clientdata(client);
3206 struct input_dev *input_dev = data->input_dev;
3207
3208 if (!input_dev)
3209 return 0;
3210
3211 mutex_lock(&input_dev->mutex);
3212
3213 if (input_dev->users)
3214 mxt_start(data);
3215
3216 mutex_unlock(&input_dev->mutex);
3217
3218 return 0;
3219 }
3220
3221 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
3222
3223 static const struct of_device_id mxt_of_match[] = {
3224 { .compatible = "atmel,maxtouch", },
3225 {},
3226 };
3227 MODULE_DEVICE_TABLE(of, mxt_of_match);
3228
3229 #ifdef CONFIG_ACPI
3230 static const struct acpi_device_id mxt_acpi_id[] = {
3231 { "ATML0000", 0 }, /* Touchpad */
3232 { "ATML0001", 0 }, /* Touchscreen */
3233 { }
3234 };
3235 MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
3236 #endif
3237
3238 static const struct i2c_device_id mxt_id[] = {
3239 { "qt602240_ts", 0 },
3240 { "atmel_mxt_ts", 0 },
3241 { "atmel_mxt_tp", 0 },
3242 { "maxtouch", 0 },
3243 { "mXT224", 0 },
3244 { }
3245 };
3246 MODULE_DEVICE_TABLE(i2c, mxt_id);
3247
3248 static struct i2c_driver mxt_driver = {
3249 .driver = {
3250 .name = "atmel_mxt_ts",
3251 .of_match_table = of_match_ptr(mxt_of_match),
3252 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
3253 .pm = &mxt_pm_ops,
3254 },
3255 .probe = mxt_probe,
3256 .remove = mxt_remove,
3257 .id_table = mxt_id,
3258 };
3259
3260 module_i2c_driver(mxt_driver);
3261
3262 /* Module information */
3263 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
3264 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
3265 MODULE_LICENSE("GPL");
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