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dm writecache: add cond_resched to loop in persistent_memory_claim()
[linux/fpc-iii.git] / drivers / input / touchscreen / atmel_mxt_ts.c
blobae60442efda0dcc29988d16ac32e3488c4e107ea
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Atmel maXTouch Touchscreen driver
4 *
5 * Copyright (C) 2010 Samsung Electronics Co.Ltd
6 * Copyright (C) 2011-2014 Atmel Corporation
7 * Copyright (C) 2012 Google, Inc.
8 * Copyright (C) 2016 Zodiac Inflight Innovations
9 *
10 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
11 */
12
13 #include <linux/acpi.h>
14 #include <linux/dmi.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/completion.h>
18 #include <linux/delay.h>
19 #include <linux/firmware.h>
20 #include <linux/i2c.h>
21 #include <linux/input/mt.h>
22 #include <linux/interrupt.h>
23 #include <linux/of.h>
24 #include <linux/property.h>
25 #include <linux/slab.h>
26 #include <linux/gpio/consumer.h>
27 #include <asm/unaligned.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/videobuf2-v4l2.h>
31 #include <media/videobuf2-vmalloc.h>
32
33 /* Firmware files */
34 #define MXT_FW_NAME "maxtouch.fw"
35 #define MXT_CFG_NAME "maxtouch.cfg"
36 #define MXT_CFG_MAGIC "OBP_RAW V1"
37
38 /* Registers */
39 #define MXT_OBJECT_START 0x07
40 #define MXT_OBJECT_SIZE 6
41 #define MXT_INFO_CHECKSUM_SIZE 3
42 #define MXT_MAX_BLOCK_WRITE 256
43
44 /* Object types */
45 #define MXT_DEBUG_DIAGNOSTIC_T37 37
46 #define MXT_GEN_MESSAGE_T5 5
47 #define MXT_GEN_COMMAND_T6 6
48 #define MXT_GEN_POWER_T7 7
49 #define MXT_GEN_ACQUIRE_T8 8
50 #define MXT_GEN_DATASOURCE_T53 53
51 #define MXT_TOUCH_MULTI_T9 9
52 #define MXT_TOUCH_KEYARRAY_T15 15
53 #define MXT_TOUCH_PROXIMITY_T23 23
54 #define MXT_TOUCH_PROXKEY_T52 52
55 #define MXT_PROCI_GRIPFACE_T20 20
56 #define MXT_PROCG_NOISE_T22 22
57 #define MXT_PROCI_ONETOUCH_T24 24
58 #define MXT_PROCI_TWOTOUCH_T27 27
59 #define MXT_PROCI_GRIP_T40 40
60 #define MXT_PROCI_PALM_T41 41
61 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
62 #define MXT_PROCI_STYLUS_T47 47
63 #define MXT_PROCG_NOISESUPPRESSION_T48 48
64 #define MXT_SPT_COMMSCONFIG_T18 18
65 #define MXT_SPT_GPIOPWM_T19 19
66 #define MXT_SPT_SELFTEST_T25 25
67 #define MXT_SPT_CTECONFIG_T28 28
68 #define MXT_SPT_USERDATA_T38 38
69 #define MXT_SPT_DIGITIZER_T43 43
70 #define MXT_SPT_MESSAGECOUNT_T44 44
71 #define MXT_SPT_CTECONFIG_T46 46
72 #define MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 71
73 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
74
75 /* MXT_GEN_MESSAGE_T5 object */
76 #define MXT_RPTID_NOMSG 0xff
77
78 /* MXT_GEN_COMMAND_T6 field */
79 #define MXT_COMMAND_RESET 0
80 #define MXT_COMMAND_BACKUPNV 1
81 #define MXT_COMMAND_CALIBRATE 2
82 #define MXT_COMMAND_REPORTALL 3
83 #define MXT_COMMAND_DIAGNOSTIC 5
84
85 /* Define for T6 status byte */
86 #define MXT_T6_STATUS_RESET BIT(7)
87 #define MXT_T6_STATUS_OFL BIT(6)
88 #define MXT_T6_STATUS_SIGERR BIT(5)
89 #define MXT_T6_STATUS_CAL BIT(4)
90 #define MXT_T6_STATUS_CFGERR BIT(3)
91 #define MXT_T6_STATUS_COMSERR BIT(2)
92
93 /* MXT_GEN_POWER_T7 field */
94 struct t7_config {
95 u8 idle;
96 u8 active;
97 } __packed;
98
99 #define MXT_POWER_CFG_RUN 0
100 #define MXT_POWER_CFG_DEEPSLEEP 1
101
102 /* MXT_TOUCH_MULTI_T9 field */
103 #define MXT_T9_CTRL 0
104 #define MXT_T9_XSIZE 3
105 #define MXT_T9_YSIZE 4
106 #define MXT_T9_ORIENT 9
107 #define MXT_T9_RANGE 18
108
109 /* MXT_TOUCH_MULTI_T9 status */
110 #define MXT_T9_UNGRIP BIT(0)
111 #define MXT_T9_SUPPRESS BIT(1)
112 #define MXT_T9_AMP BIT(2)
113 #define MXT_T9_VECTOR BIT(3)
114 #define MXT_T9_MOVE BIT(4)
115 #define MXT_T9_RELEASE BIT(5)
116 #define MXT_T9_PRESS BIT(6)
117 #define MXT_T9_DETECT BIT(7)
118
119 struct t9_range {
120 __le16 x;
121 __le16 y;
122 } __packed;
123
124 /* MXT_TOUCH_MULTI_T9 orient */
125 #define MXT_T9_ORIENT_SWITCH BIT(0)
126 #define MXT_T9_ORIENT_INVERTX BIT(1)
127 #define MXT_T9_ORIENT_INVERTY BIT(2)
128
129 /* MXT_SPT_COMMSCONFIG_T18 */
130 #define MXT_COMMS_CTRL 0
131 #define MXT_COMMS_CMD 1
132
133 /* MXT_DEBUG_DIAGNOSTIC_T37 */
134 #define MXT_DIAGNOSTIC_PAGEUP 0x01
135 #define MXT_DIAGNOSTIC_DELTAS 0x10
136 #define MXT_DIAGNOSTIC_REFS 0x11
137 #define MXT_DIAGNOSTIC_SIZE 128
138
139 #define MXT_FAMILY_1386 160
140 #define MXT1386_COLUMNS 3
141 #define MXT1386_PAGES_PER_COLUMN 8
142
143 struct t37_debug {
144 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
145 u8 mode;
146 u8 page;
147 u8 data[MXT_DIAGNOSTIC_SIZE];
148 #endif
149 };
150
151 /* Define for MXT_GEN_COMMAND_T6 */
152 #define MXT_BOOT_VALUE 0xa5
153 #define MXT_RESET_VALUE 0x01
154 #define MXT_BACKUP_VALUE 0x55
155
156 /* T100 Multiple Touch Touchscreen */
157 #define MXT_T100_CTRL 0
158 #define MXT_T100_CFG1 1
159 #define MXT_T100_TCHAUX 3
160 #define MXT_T100_XSIZE 9
161 #define MXT_T100_XRANGE 13
162 #define MXT_T100_YSIZE 20
163 #define MXT_T100_YRANGE 24
164
165 #define MXT_T100_CFG_SWITCHXY BIT(5)
166 #define MXT_T100_CFG_INVERTY BIT(6)
167 #define MXT_T100_CFG_INVERTX BIT(7)
168
169 #define MXT_T100_TCHAUX_VECT BIT(0)
170 #define MXT_T100_TCHAUX_AMPL BIT(1)
171 #define MXT_T100_TCHAUX_AREA BIT(2)
172
173 #define MXT_T100_DETECT BIT(7)
174 #define MXT_T100_TYPE_MASK 0x70
175
176 enum t100_type {
177 MXT_T100_TYPE_FINGER = 1,
178 MXT_T100_TYPE_PASSIVE_STYLUS = 2,
179 MXT_T100_TYPE_HOVERING_FINGER = 4,
180 MXT_T100_TYPE_GLOVE = 5,
181 MXT_T100_TYPE_LARGE_TOUCH = 6,
182 };
183
184 #define MXT_DISTANCE_ACTIVE_TOUCH 0
185 #define MXT_DISTANCE_HOVERING 1
186
187 #define MXT_TOUCH_MAJOR_DEFAULT 1
188 #define MXT_PRESSURE_DEFAULT 1
189
190 /* Delay times */
191 #define MXT_BACKUP_TIME 50 /* msec */
192 #define MXT_RESET_GPIO_TIME 20 /* msec */
193 #define MXT_RESET_INVALID_CHG 100 /* msec */
194 #define MXT_RESET_TIME 200 /* msec */
195 #define MXT_RESET_TIMEOUT 3000 /* msec */
196 #define MXT_CRC_TIMEOUT 1000 /* msec */
197 #define MXT_FW_RESET_TIME 3000 /* msec */
198 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
199
200 /* Command to unlock bootloader */
201 #define MXT_UNLOCK_CMD_MSB 0xaa
202 #define MXT_UNLOCK_CMD_LSB 0xdc
203
204 /* Bootloader mode status */
205 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
206 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
207 #define MXT_FRAME_CRC_CHECK 0x02
208 #define MXT_FRAME_CRC_FAIL 0x03
209 #define MXT_FRAME_CRC_PASS 0x04
210 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
211 #define MXT_BOOT_STATUS_MASK 0x3f
212 #define MXT_BOOT_EXTENDED_ID BIT(5)
213 #define MXT_BOOT_ID_MASK 0x1f
214
215 /* Touchscreen absolute values */
216 #define MXT_MAX_AREA 0xff
217
218 #define MXT_PIXELS_PER_MM 20
219
220 struct mxt_info {
221 u8 family_id;
222 u8 variant_id;
223 u8 version;
224 u8 build;
225 u8 matrix_xsize;
226 u8 matrix_ysize;
227 u8 object_num;
228 };
229
230 struct mxt_object {
231 u8 type;
232 u16 start_address;
233 u8 size_minus_one;
234 u8 instances_minus_one;
235 u8 num_report_ids;
236 } __packed;
237
238 struct mxt_dbg {
239 u16 t37_address;
240 u16 diag_cmd_address;
241 struct t37_debug *t37_buf;
242 unsigned int t37_pages;
243 unsigned int t37_nodes;
244
245 struct v4l2_device v4l2;
246 struct v4l2_pix_format format;
247 struct video_device vdev;
248 struct vb2_queue queue;
249 struct mutex lock;
250 int input;
251 };
252
253 enum v4l_dbg_inputs {
254 MXT_V4L_INPUT_DELTAS,
255 MXT_V4L_INPUT_REFS,
256 MXT_V4L_INPUT_MAX,
257 };
258
259 enum mxt_suspend_mode {
260 MXT_SUSPEND_DEEP_SLEEP = 0,
261 MXT_SUSPEND_T9_CTRL = 1,
262 };
263
264 /* Config update context */
265 struct mxt_cfg {
266 u8 *raw;
267 size_t raw_size;
268 off_t raw_pos;
269
270 u8 *mem;
271 size_t mem_size;
272 int start_ofs;
273
274 struct mxt_info info;
275 };
276
277 /* Each client has this additional data */
278 struct mxt_data {
279 struct i2c_client *client;
280 struct input_dev *input_dev;
281 char phys[64]; /* device physical location */
282 struct mxt_object *object_table;
283 struct mxt_info *info;
284 void *raw_info_block;
285 unsigned int irq;
286 unsigned int max_x;
287 unsigned int max_y;
288 bool invertx;
289 bool inverty;
290 bool xy_switch;
291 u8 xsize;
292 u8 ysize;
293 bool in_bootloader;
294 u16 mem_size;
295 u8 t100_aux_ampl;
296 u8 t100_aux_area;
297 u8 t100_aux_vect;
298 u8 max_reportid;
299 u32 config_crc;
300 u32 info_crc;
301 u8 bootloader_addr;
302 u8 *msg_buf;
303 u8 t6_status;
304 bool update_input;
305 u8 last_message_count;
306 u8 num_touchids;
307 u8 multitouch;
308 struct t7_config t7_cfg;
309 struct mxt_dbg dbg;
310 struct gpio_desc *reset_gpio;
311
312 /* Cached parameters from object table */
313 u16 T5_address;
314 u8 T5_msg_size;
315 u8 T6_reportid;
316 u16 T6_address;
317 u16 T7_address;
318 u16 T71_address;
319 u8 T9_reportid_min;
320 u8 T9_reportid_max;
321 u8 T19_reportid;
322 u16 T44_address;
323 u8 T100_reportid_min;
324 u8 T100_reportid_max;
325
326 /* for fw update in bootloader */
327 struct completion bl_completion;
328
329 /* for reset handling */
330 struct completion reset_completion;
331
332 /* for config update handling */
333 struct completion crc_completion;
334
335 u32 *t19_keymap;
336 unsigned int t19_num_keys;
337
338 enum mxt_suspend_mode suspend_mode;
339 };
340
341 struct mxt_vb2_buffer {
342 struct vb2_buffer vb;
343 struct list_head list;
344 };
345
346 static size_t mxt_obj_size(const struct mxt_object *obj)
347 {
348 return obj->size_minus_one + 1;
349 }
350
351 static size_t mxt_obj_instances(const struct mxt_object *obj)
352 {
353 return obj->instances_minus_one + 1;
354 }
355
356 static bool mxt_object_readable(unsigned int type)
357 {
358 switch (type) {
359 case MXT_GEN_COMMAND_T6:
360 case MXT_GEN_POWER_T7:
361 case MXT_GEN_ACQUIRE_T8:
362 case MXT_GEN_DATASOURCE_T53:
363 case MXT_TOUCH_MULTI_T9:
364 case MXT_TOUCH_KEYARRAY_T15:
365 case MXT_TOUCH_PROXIMITY_T23:
366 case MXT_TOUCH_PROXKEY_T52:
367 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
368 case MXT_PROCI_GRIPFACE_T20:
369 case MXT_PROCG_NOISE_T22:
370 case MXT_PROCI_ONETOUCH_T24:
371 case MXT_PROCI_TWOTOUCH_T27:
372 case MXT_PROCI_GRIP_T40:
373 case MXT_PROCI_PALM_T41:
374 case MXT_PROCI_TOUCHSUPPRESSION_T42:
375 case MXT_PROCI_STYLUS_T47:
376 case MXT_PROCG_NOISESUPPRESSION_T48:
377 case MXT_SPT_COMMSCONFIG_T18:
378 case MXT_SPT_GPIOPWM_T19:
379 case MXT_SPT_SELFTEST_T25:
380 case MXT_SPT_CTECONFIG_T28:
381 case MXT_SPT_USERDATA_T38:
382 case MXT_SPT_DIGITIZER_T43:
383 case MXT_SPT_CTECONFIG_T46:
384 case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71:
385 return true;
386 default:
387 return false;
388 }
389 }
390
391 static void mxt_dump_message(struct mxt_data *data, u8 *message)
392 {
393 dev_dbg(&data->client->dev, "message: %*ph\n",
394 data->T5_msg_size, message);
395 }
396
397 static int mxt_wait_for_completion(struct mxt_data *data,
398 struct completion *comp,
399 unsigned int timeout_ms)
400 {
401 struct device *dev = &data->client->dev;
402 unsigned long timeout = msecs_to_jiffies(timeout_ms);
403 long ret;
404
405 ret = wait_for_completion_interruptible_timeout(comp, timeout);
406 if (ret < 0) {
407 return ret;
408 } else if (ret == 0) {
409 dev_err(dev, "Wait for completion timed out.\n");
410 return -ETIMEDOUT;
411 }
412 return 0;
413 }
414
415 static int mxt_bootloader_read(struct mxt_data *data,
416 u8 *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.flags |= I2C_M_RD;
424 msg.len = count;
425 msg.buf = val;
426
427 ret = i2c_transfer(data->client->adapter, &msg, 1);
428 if (ret == 1) {
429 ret = 0;
430 } else {
431 ret = ret < 0 ? ret : -EIO;
432 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
433 __func__, ret);
434 }
435
436 return ret;
437 }
438
439 static int mxt_bootloader_write(struct mxt_data *data,
440 const u8 * const val, unsigned int count)
441 {
442 int ret;
443 struct i2c_msg msg;
444
445 msg.addr = data->bootloader_addr;
446 msg.flags = data->client->flags & I2C_M_TEN;
447 msg.len = count;
448 msg.buf = (u8 *)val;
449
450 ret = i2c_transfer(data->client->adapter, &msg, 1);
451 if (ret == 1) {
452 ret = 0;
453 } else {
454 ret = ret < 0 ? ret : -EIO;
455 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
456 __func__, ret);
457 }
458
459 return ret;
460 }
461
462 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
463 {
464 u8 appmode = data->client->addr;
465 u8 bootloader;
466 u8 family_id = data->info ? data->info->family_id : 0;
467
468 switch (appmode) {
469 case 0x4a:
470 case 0x4b:
471 /* Chips after 1664S use different scheme */
472 if (retry || family_id >= 0xa2) {
473 bootloader = appmode - 0x24;
474 break;
475 }
476 /* Fall through - for normal case */
477 case 0x4c:
478 case 0x4d:
479 case 0x5a:
480 case 0x5b:
481 bootloader = appmode - 0x26;
482 break;
483
484 default:
485 dev_err(&data->client->dev,
486 "Appmode i2c address 0x%02x not found\n",
487 appmode);
488 return -EINVAL;
489 }
490
491 data->bootloader_addr = bootloader;
492 return 0;
493 }
494
495 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
496 {
497 struct device *dev = &data->client->dev;
498 int error;
499 u8 val;
500 bool crc_failure;
501
502 error = mxt_lookup_bootloader_address(data, alt_address);
503 if (error)
504 return error;
505
506 error = mxt_bootloader_read(data, &val, 1);
507 if (error)
508 return error;
509
510 /* Check app crc fail mode */
511 crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
512
513 dev_err(dev, "Detected bootloader, status:%02X%s\n",
514 val, crc_failure ? ", APP_CRC_FAIL" : "");
515
516 return 0;
517 }
518
519 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
520 {
521 struct device *dev = &data->client->dev;
522 u8 buf[3];
523
524 if (val & MXT_BOOT_EXTENDED_ID) {
525 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
526 dev_err(dev, "%s: i2c failure\n", __func__);
527 return val;
528 }
529
530 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
531
532 return buf[0];
533 } else {
534 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
535
536 return val;
537 }
538 }
539
540 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
541 bool wait)
542 {
543 struct device *dev = &data->client->dev;
544 u8 val;
545 int ret;
546
547 recheck:
548 if (wait) {
549 /*
550 * In application update mode, the interrupt
551 * line signals state transitions. We must wait for the
552 * CHG assertion before reading the status byte.
553 * Once the status byte has been read, the line is deasserted.
554 */
555 ret = mxt_wait_for_completion(data, &data->bl_completion,
556 MXT_FW_CHG_TIMEOUT);
557 if (ret) {
558 /*
559 * TODO: handle -ERESTARTSYS better by terminating
560 * fw update process before returning to userspace
561 * by writing length 0x000 to device (iff we are in
562 * WAITING_FRAME_DATA state).
563 */
564 dev_err(dev, "Update wait error %d\n", ret);
565 return ret;
566 }
567 }
568
569 ret = mxt_bootloader_read(data, &val, 1);
570 if (ret)
571 return ret;
572
573 if (state == MXT_WAITING_BOOTLOAD_CMD)
574 val = mxt_get_bootloader_version(data, val);
575
576 switch (state) {
577 case MXT_WAITING_BOOTLOAD_CMD:
578 case MXT_WAITING_FRAME_DATA:
579 case MXT_APP_CRC_FAIL:
580 val &= ~MXT_BOOT_STATUS_MASK;
581 break;
582 case MXT_FRAME_CRC_PASS:
583 if (val == MXT_FRAME_CRC_CHECK) {
584 goto recheck;
585 } else if (val == MXT_FRAME_CRC_FAIL) {
586 dev_err(dev, "Bootloader CRC fail\n");
587 return -EINVAL;
588 }
589 break;
590 default:
591 return -EINVAL;
592 }
593
594 if (val != state) {
595 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
596 val, state);
597 return -EINVAL;
598 }
599
600 return 0;
601 }
602
603 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
604 {
605 int ret;
606 u8 buf[2];
607
608 if (unlock) {
609 buf[0] = MXT_UNLOCK_CMD_LSB;
610 buf[1] = MXT_UNLOCK_CMD_MSB;
611 } else {
612 buf[0] = 0x01;
613 buf[1] = 0x01;
614 }
615
616 ret = mxt_bootloader_write(data, buf, 2);
617 if (ret)
618 return ret;
619
620 return 0;
621 }
622
623 static int __mxt_read_reg(struct i2c_client *client,
624 u16 reg, u16 len, void *val)
625 {
626 struct i2c_msg xfer[2];
627 u8 buf[2];
628 int ret;
629
630 buf[0] = reg & 0xff;
631 buf[1] = (reg >> 8) & 0xff;
632
633 /* Write register */
634 xfer[0].addr = client->addr;
635 xfer[0].flags = 0;
636 xfer[0].len = 2;
637 xfer[0].buf = buf;
638
639 /* Read data */
640 xfer[1].addr = client->addr;
641 xfer[1].flags = I2C_M_RD;
642 xfer[1].len = len;
643 xfer[1].buf = val;
644
645 ret = i2c_transfer(client->adapter, xfer, 2);
646 if (ret == 2) {
647 ret = 0;
648 } else {
649 if (ret >= 0)
650 ret = -EIO;
651 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
652 __func__, ret);
653 }
654
655 return ret;
656 }
657
658 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
659 const void *val)
660 {
661 u8 *buf;
662 size_t count;
663 int ret;
664
665 count = len + 2;
666 buf = kmalloc(count, GFP_KERNEL);
667 if (!buf)
668 return -ENOMEM;
669
670 buf[0] = reg & 0xff;
671 buf[1] = (reg >> 8) & 0xff;
672 memcpy(&buf[2], val, len);
673
674 ret = i2c_master_send(client, buf, count);
675 if (ret == count) {
676 ret = 0;
677 } else {
678 if (ret >= 0)
679 ret = -EIO;
680 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
681 __func__, ret);
682 }
683
684 kfree(buf);
685 return ret;
686 }
687
688 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
689 {
690 return __mxt_write_reg(client, reg, 1, &val);
691 }
692
693 static struct mxt_object *
694 mxt_get_object(struct mxt_data *data, u8 type)
695 {
696 struct mxt_object *object;
697 int i;
698
699 for (i = 0; i < data->info->object_num; i++) {
700 object = data->object_table + i;
701 if (object->type == type)
702 return object;
703 }
704
705 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
706 return NULL;
707 }
708
709 static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
710 {
711 struct device *dev = &data->client->dev;
712 u8 status = msg[1];
713 u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
714
715 if (crc != data->config_crc) {
716 data->config_crc = crc;
717 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
718 }
719
720 complete(&data->crc_completion);
721
722 /* Detect reset */
723 if (status & MXT_T6_STATUS_RESET)
724 complete(&data->reset_completion);
725
726 /* Output debug if status has changed */
727 if (status != data->t6_status)
728 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
729 status,
730 status == 0 ? " OK" : "",
731 status & MXT_T6_STATUS_RESET ? " RESET" : "",
732 status & MXT_T6_STATUS_OFL ? " OFL" : "",
733 status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
734 status & MXT_T6_STATUS_CAL ? " CAL" : "",
735 status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
736 status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
737
738 /* Save current status */
739 data->t6_status = status;
740 }
741
742 static int mxt_write_object(struct mxt_data *data,
743 u8 type, u8 offset, u8 val)
744 {
745 struct mxt_object *object;
746 u16 reg;
747
748 object = mxt_get_object(data, type);
749 if (!object || offset >= mxt_obj_size(object))
750 return -EINVAL;
751
752 reg = object->start_address;
753 return mxt_write_reg(data->client, reg + offset, val);
754 }
755
756 static void mxt_input_button(struct mxt_data *data, u8 *message)
757 {
758 struct input_dev *input = data->input_dev;
759 int i;
760
761 for (i = 0; i < data->t19_num_keys; i++) {
762 if (data->t19_keymap[i] == KEY_RESERVED)
763 continue;
764
765 /* Active-low switch */
766 input_report_key(input, data->t19_keymap[i],
767 !(message[1] & BIT(i)));
768 }
769 }
770
771 static void mxt_input_sync(struct mxt_data *data)
772 {
773 input_mt_report_pointer_emulation(data->input_dev,
774 data->t19_num_keys);
775 input_sync(data->input_dev);
776 }
777
778 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
779 {
780 struct device *dev = &data->client->dev;
781 struct input_dev *input_dev = data->input_dev;
782 int id;
783 u8 status;
784 int x;
785 int y;
786 int area;
787 int amplitude;
788
789 id = message[0] - data->T9_reportid_min;
790 status = message[1];
791 x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
792 y = (message[3] << 4) | ((message[4] & 0xf));
793
794 /* Handle 10/12 bit switching */
795 if (data->max_x < 1024)
796 x >>= 2;
797 if (data->max_y < 1024)
798 y >>= 2;
799
800 area = message[5];
801 amplitude = message[6];
802
803 dev_dbg(dev,
804 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
805 id,
806 (status & MXT_T9_DETECT) ? 'D' : '.',
807 (status & MXT_T9_PRESS) ? 'P' : '.',
808 (status & MXT_T9_RELEASE) ? 'R' : '.',
809 (status & MXT_T9_MOVE) ? 'M' : '.',
810 (status & MXT_T9_VECTOR) ? 'V' : '.',
811 (status & MXT_T9_AMP) ? 'A' : '.',
812 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
813 (status & MXT_T9_UNGRIP) ? 'U' : '.',
814 x, y, area, amplitude);
815
816 input_mt_slot(input_dev, id);
817
818 if (status & MXT_T9_DETECT) {
819 /*
820 * Multiple bits may be set if the host is slow to read
821 * the status messages, indicating all the events that
822 * have happened.
823 */
824 if (status & MXT_T9_RELEASE) {
825 input_mt_report_slot_state(input_dev,
826 MT_TOOL_FINGER, 0);
827 mxt_input_sync(data);
828 }
829
830 /* if active, pressure must be non-zero */
831 if (!amplitude)
832 amplitude = MXT_PRESSURE_DEFAULT;
833
834 /* Touch active */
835 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
836 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
837 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
838 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
839 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
840 } else {
841 /* Touch no longer active, close out slot */
842 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
843 }
844
845 data->update_input = true;
846 }
847
848 static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
849 {
850 struct device *dev = &data->client->dev;
851 struct input_dev *input_dev = data->input_dev;
852 int id;
853 u8 status;
854 u8 type = 0;
855 u16 x;
856 u16 y;
857 int distance = 0;
858 int tool = 0;
859 u8 major = 0;
860 u8 pressure = 0;
861 u8 orientation = 0;
862
863 id = message[0] - data->T100_reportid_min - 2;
864
865 /* ignore SCRSTATUS events */
866 if (id < 0)
867 return;
868
869 status = message[1];
870 x = get_unaligned_le16(&message[2]);
871 y = get_unaligned_le16(&message[4]);
872
873 if (status & MXT_T100_DETECT) {
874 type = (status & MXT_T100_TYPE_MASK) >> 4;
875
876 switch (type) {
877 case MXT_T100_TYPE_HOVERING_FINGER:
878 tool = MT_TOOL_FINGER;
879 distance = MXT_DISTANCE_HOVERING;
880
881 if (data->t100_aux_vect)
882 orientation = message[data->t100_aux_vect];
883
884 break;
885
886 case MXT_T100_TYPE_FINGER:
887 case MXT_T100_TYPE_GLOVE:
888 tool = MT_TOOL_FINGER;
889 distance = MXT_DISTANCE_ACTIVE_TOUCH;
890
891 if (data->t100_aux_area)
892 major = message[data->t100_aux_area];
893
894 if (data->t100_aux_ampl)
895 pressure = message[data->t100_aux_ampl];
896
897 if (data->t100_aux_vect)
898 orientation = message[data->t100_aux_vect];
899
900 break;
901
902 case MXT_T100_TYPE_PASSIVE_STYLUS:
903 tool = MT_TOOL_PEN;
904
905 /*
906 * Passive stylus is reported with size zero so
907 * hardcode.
908 */
909 major = MXT_TOUCH_MAJOR_DEFAULT;
910
911 if (data->t100_aux_ampl)
912 pressure = message[data->t100_aux_ampl];
913
914 break;
915
916 case MXT_T100_TYPE_LARGE_TOUCH:
917 /* Ignore suppressed touch */
918 break;
919
920 default:
921 dev_dbg(dev, "Unexpected T100 type\n");
922 return;
923 }
924 }
925
926 /*
927 * Values reported should be non-zero if tool is touching the
928 * device
929 */
930 if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
931 pressure = MXT_PRESSURE_DEFAULT;
932
933 input_mt_slot(input_dev, id);
934
935 if (status & MXT_T100_DETECT) {
936 dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
937 id, type, x, y, major, pressure, orientation);
938
939 input_mt_report_slot_state(input_dev, tool, 1);
940 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
941 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
942 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
943 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
944 input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
945 input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
946 } else {
947 dev_dbg(dev, "[%u] release\n", id);
948
949 /* close out slot */
950 input_mt_report_slot_state(input_dev, 0, 0);
951 }
952
953 data->update_input = true;
954 }
955
956 static int mxt_proc_message(struct mxt_data *data, u8 *message)
957 {
958 u8 report_id = message[0];
959
960 if (report_id == MXT_RPTID_NOMSG)
961 return 0;
962
963 if (report_id == data->T6_reportid) {
964 mxt_proc_t6_messages(data, message);
965 } else if (!data->input_dev) {
966 /*
967 * Do not report events if input device
968 * is not yet registered.
969 */
970 mxt_dump_message(data, message);
971 } else if (report_id >= data->T9_reportid_min &&
972 report_id <= data->T9_reportid_max) {
973 mxt_proc_t9_message(data, message);
974 } else if (report_id >= data->T100_reportid_min &&
975 report_id <= data->T100_reportid_max) {
976 mxt_proc_t100_message(data, message);
977 } else if (report_id == data->T19_reportid) {
978 mxt_input_button(data, message);
979 data->update_input = true;
980 } else {
981 mxt_dump_message(data, message);
982 }
983
984 return 1;
985 }
986
987 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
988 {
989 struct device *dev = &data->client->dev;
990 int ret;
991 int i;
992 u8 num_valid = 0;
993
994 /* Safety check for msg_buf */
995 if (count > data->max_reportid)
996 return -EINVAL;
997
998 /* Process remaining messages if necessary */
999 ret = __mxt_read_reg(data->client, data->T5_address,
1000 data->T5_msg_size * count, data->msg_buf);
1001 if (ret) {
1002 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
1003 return ret;
1004 }
1005
1006 for (i = 0; i < count; i++) {
1007 ret = mxt_proc_message(data,
1008 data->msg_buf + data->T5_msg_size * i);
1009
1010 if (ret == 1)
1011 num_valid++;
1012 }
1013
1014 /* return number of messages read */
1015 return num_valid;
1016 }
1017
1018 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
1019 {
1020 struct device *dev = &data->client->dev;
1021 int ret;
1022 u8 count, num_left;
1023
1024 /* Read T44 and T5 together */
1025 ret = __mxt_read_reg(data->client, data->T44_address,
1026 data->T5_msg_size + 1, data->msg_buf);
1027 if (ret) {
1028 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
1029 return IRQ_NONE;
1030 }
1031
1032 count = data->msg_buf[0];
1033
1034 /*
1035 * This condition may be caused by the CHG line being configured in
1036 * Mode 0. It results in unnecessary I2C operations but it is benign.
1037 */
1038 if (count == 0)
1039 return IRQ_NONE;
1040
1041 if (count > data->max_reportid) {
1042 dev_warn(dev, "T44 count %d exceeded max report id\n", count);
1043 count = data->max_reportid;
1044 }
1045
1046 /* Process first message */
1047 ret = mxt_proc_message(data, data->msg_buf + 1);
1048 if (ret < 0) {
1049 dev_warn(dev, "Unexpected invalid message\n");
1050 return IRQ_NONE;
1051 }
1052
1053 num_left = count - 1;
1054
1055 /* Process remaining messages if necessary */
1056 if (num_left) {
1057 ret = mxt_read_and_process_messages(data, num_left);
1058 if (ret < 0)
1059 goto end;
1060 else if (ret != num_left)
1061 dev_warn(dev, "Unexpected invalid message\n");
1062 }
1063
1064 end:
1065 if (data->update_input) {
1066 mxt_input_sync(data);
1067 data->update_input = false;
1068 }
1069
1070 return IRQ_HANDLED;
1071 }
1072
1073 static int mxt_process_messages_until_invalid(struct mxt_data *data)
1074 {
1075 struct device *dev = &data->client->dev;
1076 int count, read;
1077 u8 tries = 2;
1078
1079 count = data->max_reportid;
1080
1081 /* Read messages until we force an invalid */
1082 do {
1083 read = mxt_read_and_process_messages(data, count);
1084 if (read < count)
1085 return 0;
1086 } while (--tries);
1087
1088 if (data->update_input) {
1089 mxt_input_sync(data);
1090 data->update_input = false;
1091 }
1092
1093 dev_err(dev, "CHG pin isn't cleared\n");
1094 return -EBUSY;
1095 }
1096
1097 static irqreturn_t mxt_process_messages(struct mxt_data *data)
1098 {
1099 int total_handled, num_handled;
1100 u8 count = data->last_message_count;
1101
1102 if (count < 1 || count > data->max_reportid)
1103 count = 1;
1104
1105 /* include final invalid message */
1106 total_handled = mxt_read_and_process_messages(data, count + 1);
1107 if (total_handled < 0)
1108 return IRQ_NONE;
1109 /* if there were invalid messages, then we are done */
1110 else if (total_handled <= count)
1111 goto update_count;
1112
1113 /* keep reading two msgs until one is invalid or reportid limit */
1114 do {
1115 num_handled = mxt_read_and_process_messages(data, 2);
1116 if (num_handled < 0)
1117 return IRQ_NONE;
1118
1119 total_handled += num_handled;
1120
1121 if (num_handled < 2)
1122 break;
1123 } while (total_handled < data->num_touchids);
1124
1125 update_count:
1126 data->last_message_count = total_handled;
1127
1128 if (data->update_input) {
1129 mxt_input_sync(data);
1130 data->update_input = false;
1131 }
1132
1133 return IRQ_HANDLED;
1134 }
1135
1136 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1137 {
1138 struct mxt_data *data = dev_id;
1139
1140 if (data->in_bootloader) {
1141 /* bootloader state transition completion */
1142 complete(&data->bl_completion);
1143 return IRQ_HANDLED;
1144 }
1145
1146 if (!data->object_table)
1147 return IRQ_HANDLED;
1148
1149 if (data->T44_address) {
1150 return mxt_process_messages_t44(data);
1151 } else {
1152 return mxt_process_messages(data);
1153 }
1154 }
1155
1156 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1157 u8 value, bool wait)
1158 {
1159 u16 reg;
1160 u8 command_register;
1161 int timeout_counter = 0;
1162 int ret;
1163
1164 reg = data->T6_address + cmd_offset;
1165
1166 ret = mxt_write_reg(data->client, reg, value);
1167 if (ret)
1168 return ret;
1169
1170 if (!wait)
1171 return 0;
1172
1173 do {
1174 msleep(20);
1175 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1176 if (ret)
1177 return ret;
1178 } while (command_register != 0 && timeout_counter++ <= 100);
1179
1180 if (timeout_counter > 100) {
1181 dev_err(&data->client->dev, "Command failed!\n");
1182 return -EIO;
1183 }
1184
1185 return 0;
1186 }
1187
1188 static int mxt_acquire_irq(struct mxt_data *data)
1189 {
1190 int error;
1191
1192 enable_irq(data->irq);
1193
1194 error = mxt_process_messages_until_invalid(data);
1195 if (error)
1196 return error;
1197
1198 return 0;
1199 }
1200
1201 static int mxt_soft_reset(struct mxt_data *data)
1202 {
1203 struct device *dev = &data->client->dev;
1204 int ret = 0;
1205
1206 dev_info(dev, "Resetting device\n");
1207
1208 disable_irq(data->irq);
1209
1210 reinit_completion(&data->reset_completion);
1211
1212 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1213 if (ret)
1214 return ret;
1215
1216 /* Ignore CHG line for 100ms after reset */
1217 msleep(MXT_RESET_INVALID_CHG);
1218
1219 mxt_acquire_irq(data);
1220
1221 ret = mxt_wait_for_completion(data, &data->reset_completion,
1222 MXT_RESET_TIMEOUT);
1223 if (ret)
1224 return ret;
1225
1226 return 0;
1227 }
1228
1229 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1230 {
1231 /*
1232 * On failure, CRC is set to 0 and config will always be
1233 * downloaded.
1234 */
1235 data->config_crc = 0;
1236 reinit_completion(&data->crc_completion);
1237
1238 mxt_t6_command(data, cmd, value, true);
1239
1240 /*
1241 * Wait for crc message. On failure, CRC is set to 0 and config will
1242 * always be downloaded.
1243 */
1244 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1245 }
1246
1247 static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1248 {
1249 static const unsigned int crcpoly = 0x80001B;
1250 u32 result;
1251 u32 data_word;
1252
1253 data_word = (secondbyte << 8) | firstbyte;
1254 result = ((*crc << 1) ^ data_word);
1255
1256 if (result & 0x1000000)
1257 result ^= crcpoly;
1258
1259 *crc = result;
1260 }
1261
1262 static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1263 {
1264 u32 crc = 0;
1265 u8 *ptr = base + start_off;
1266 u8 *last_val = base + end_off - 1;
1267
1268 if (end_off < start_off)
1269 return -EINVAL;
1270
1271 while (ptr < last_val) {
1272 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1273 ptr += 2;
1274 }
1275
1276 /* if len is odd, fill the last byte with 0 */
1277 if (ptr == last_val)
1278 mxt_calc_crc24(&crc, *ptr, 0);
1279
1280 /* Mask to 24-bit */
1281 crc &= 0x00FFFFFF;
1282
1283 return crc;
1284 }
1285
1286 static int mxt_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg)
1287 {
1288 struct device *dev = &data->client->dev;
1289 struct mxt_object *object;
1290 unsigned int type, instance, size, byte_offset;
1291 int offset;
1292 int ret;
1293 int i;
1294 u16 reg;
1295 u8 val;
1296
1297 while (cfg->raw_pos < cfg->raw_size) {
1298 /* Read type, instance, length */
1299 ret = sscanf(cfg->raw + cfg->raw_pos, "%x %x %x%n",
1300 &type, &instance, &size, &offset);
1301 if (ret == 0) {
1302 /* EOF */
1303 break;
1304 } else if (ret != 3) {
1305 dev_err(dev, "Bad format: failed to parse object\n");
1306 return -EINVAL;
1307 }
1308 cfg->raw_pos += offset;
1309
1310 object = mxt_get_object(data, type);
1311 if (!object) {
1312 /* Skip object */
1313 for (i = 0; i < size; i++) {
1314 ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n",
1315 &val, &offset);
1316 if (ret != 1) {
1317 dev_err(dev, "Bad format in T%d at %d\n",
1318 type, i);
1319 return -EINVAL;
1320 }
1321 cfg->raw_pos += offset;
1322 }
1323 continue;
1324 }
1325
1326 if (size > mxt_obj_size(object)) {
1327 /*
1328 * Either we are in fallback mode due to wrong
1329 * config or config from a later fw version,
1330 * or the file is corrupt or hand-edited.
1331 */
1332 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1333 size - mxt_obj_size(object), type);
1334 } else if (mxt_obj_size(object) > size) {
1335 /*
1336 * If firmware is upgraded, new bytes may be added to
1337 * end of objects. It is generally forward compatible
1338 * to zero these bytes - previous behaviour will be
1339 * retained. However this does invalidate the CRC and
1340 * will force fallback mode until the configuration is
1341 * updated. We warn here but do nothing else - the
1342 * malloc has zeroed the entire configuration.
1343 */
1344 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1345 mxt_obj_size(object) - size, type);
1346 }
1347
1348 if (instance >= mxt_obj_instances(object)) {
1349 dev_err(dev, "Object instances exceeded!\n");
1350 return -EINVAL;
1351 }
1352
1353 reg = object->start_address + mxt_obj_size(object) * instance;
1354
1355 for (i = 0; i < size; i++) {
1356 ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n",
1357 &val,
1358 &offset);
1359 if (ret != 1) {
1360 dev_err(dev, "Bad format in T%d at %d\n",
1361 type, i);
1362 return -EINVAL;
1363 }
1364 cfg->raw_pos += offset;
1365
1366 if (i > mxt_obj_size(object))
1367 continue;
1368
1369 byte_offset = reg + i - cfg->start_ofs;
1370
1371 if (byte_offset >= 0 && byte_offset < cfg->mem_size) {
1372 *(cfg->mem + byte_offset) = val;
1373 } else {
1374 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1375 reg, object->type, byte_offset);
1376 return -EINVAL;
1377 }
1378 }
1379 }
1380
1381 return 0;
1382 }
1383
1384 static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg)
1385 {
1386 unsigned int byte_offset = 0;
1387 int error;
1388
1389 /* Write configuration as blocks */
1390 while (byte_offset < cfg->mem_size) {
1391 unsigned int size = cfg->mem_size - byte_offset;
1392
1393 if (size > MXT_MAX_BLOCK_WRITE)
1394 size = MXT_MAX_BLOCK_WRITE;
1395
1396 error = __mxt_write_reg(data->client,
1397 cfg->start_ofs + byte_offset,
1398 size, cfg->mem + byte_offset);
1399 if (error) {
1400 dev_err(&data->client->dev,
1401 "Config write error, ret=%d\n", error);
1402 return error;
1403 }
1404
1405 byte_offset += size;
1406 }
1407
1408 return 0;
1409 }
1410
1411 static int mxt_init_t7_power_cfg(struct mxt_data *data);
1412
1413 /*
1414 * mxt_update_cfg - download configuration to chip
1415 *
1416 * Atmel Raw Config File Format
1417 *
1418 * The first four lines of the raw config file contain:
1419 * 1) Version
1420 * 2) Chip ID Information (first 7 bytes of device memory)
1421 * 3) Chip Information Block 24-bit CRC Checksum
1422 * 4) Chip Configuration 24-bit CRC Checksum
1423 *
1424 * The rest of the file consists of one line per object instance:
1425 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1426 *
1427 * <TYPE> - 2-byte object type as hex
1428 * <INSTANCE> - 2-byte object instance number as hex
1429 * <SIZE> - 2-byte object size as hex
1430 * <CONTENTS> - array of <SIZE> 1-byte hex values
1431 */
1432 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw)
1433 {
1434 struct device *dev = &data->client->dev;
1435 struct mxt_cfg cfg;
1436 int ret;
1437 int offset;
1438 int i;
1439 u32 info_crc, config_crc, calculated_crc;
1440 u16 crc_start = 0;
1441
1442 /* Make zero terminated copy of the OBP_RAW file */
1443 cfg.raw = kmemdup_nul(fw->data, fw->size, GFP_KERNEL);
1444 if (!cfg.raw)
1445 return -ENOMEM;
1446
1447 cfg.raw_size = fw->size;
1448
1449 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1450
1451 if (strncmp(cfg.raw, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1452 dev_err(dev, "Unrecognised config file\n");
1453 ret = -EINVAL;
1454 goto release_raw;
1455 }
1456
1457 cfg.raw_pos = strlen(MXT_CFG_MAGIC);
1458
1459 /* Load information block and check */
1460 for (i = 0; i < sizeof(struct mxt_info); i++) {
1461 ret = sscanf(cfg.raw + cfg.raw_pos, "%hhx%n",
1462 (unsigned char *)&cfg.info + i,
1463 &offset);
1464 if (ret != 1) {
1465 dev_err(dev, "Bad format\n");
1466 ret = -EINVAL;
1467 goto release_raw;
1468 }
1469
1470 cfg.raw_pos += offset;
1471 }
1472
1473 if (cfg.info.family_id != data->info->family_id) {
1474 dev_err(dev, "Family ID mismatch!\n");
1475 ret = -EINVAL;
1476 goto release_raw;
1477 }
1478
1479 if (cfg.info.variant_id != data->info->variant_id) {
1480 dev_err(dev, "Variant ID mismatch!\n");
1481 ret = -EINVAL;
1482 goto release_raw;
1483 }
1484
1485 /* Read CRCs */
1486 ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &info_crc, &offset);
1487 if (ret != 1) {
1488 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1489 ret = -EINVAL;
1490 goto release_raw;
1491 }
1492 cfg.raw_pos += offset;
1493
1494 ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &config_crc, &offset);
1495 if (ret != 1) {
1496 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1497 ret = -EINVAL;
1498 goto release_raw;
1499 }
1500 cfg.raw_pos += offset;
1501
1502 /*
1503 * The Info Block CRC is calculated over mxt_info and the object
1504 * table. If it does not match then we are trying to load the
1505 * configuration from a different chip or firmware version, so
1506 * the configuration CRC is invalid anyway.
1507 */
1508 if (info_crc == data->info_crc) {
1509 if (config_crc == 0 || data->config_crc == 0) {
1510 dev_info(dev, "CRC zero, attempting to apply config\n");
1511 } else if (config_crc == data->config_crc) {
1512 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1513 data->config_crc);
1514 ret = 0;
1515 goto release_raw;
1516 } else {
1517 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1518 data->config_crc, config_crc);
1519 }
1520 } else {
1521 dev_warn(dev,
1522 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1523 data->info_crc, info_crc);
1524 }
1525
1526 /* Malloc memory to store configuration */
1527 cfg.start_ofs = MXT_OBJECT_START +
1528 data->info->object_num * sizeof(struct mxt_object) +
1529 MXT_INFO_CHECKSUM_SIZE;
1530 cfg.mem_size = data->mem_size - cfg.start_ofs;
1531 cfg.mem = kzalloc(cfg.mem_size, GFP_KERNEL);
1532 if (!cfg.mem) {
1533 ret = -ENOMEM;
1534 goto release_raw;
1535 }
1536
1537 ret = mxt_prepare_cfg_mem(data, &cfg);
1538 if (ret)
1539 goto release_mem;
1540
1541 /* Calculate crc of the received configs (not the raw config file) */
1542 if (data->T71_address)
1543 crc_start = data->T71_address;
1544 else if (data->T7_address)
1545 crc_start = data->T7_address;
1546 else
1547 dev_warn(dev, "Could not find CRC start\n");
1548
1549 if (crc_start > cfg.start_ofs) {
1550 calculated_crc = mxt_calculate_crc(cfg.mem,
1551 crc_start - cfg.start_ofs,
1552 cfg.mem_size);
1553
1554 if (config_crc > 0 && config_crc != calculated_crc)
1555 dev_warn(dev, "Config CRC in file inconsistent, calculated=%06X, file=%06X\n",
1556 calculated_crc, config_crc);
1557 }
1558
1559 ret = mxt_upload_cfg_mem(data, &cfg);
1560 if (ret)
1561 goto release_mem;
1562
1563 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1564
1565 ret = mxt_soft_reset(data);
1566 if (ret)
1567 goto release_mem;
1568
1569 dev_info(dev, "Config successfully updated\n");
1570
1571 /* T7 config may have changed */
1572 mxt_init_t7_power_cfg(data);
1573
1574 release_mem:
1575 kfree(cfg.mem);
1576 release_raw:
1577 kfree(cfg.raw);
1578 return ret;
1579 }
1580
1581 static void mxt_free_input_device(struct mxt_data *data)
1582 {
1583 if (data->input_dev) {
1584 input_unregister_device(data->input_dev);
1585 data->input_dev = NULL;
1586 }
1587 }
1588
1589 static void mxt_free_object_table(struct mxt_data *data)
1590 {
1591 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
1592 video_unregister_device(&data->dbg.vdev);
1593 v4l2_device_unregister(&data->dbg.v4l2);
1594 #endif
1595 data->object_table = NULL;
1596 data->info = NULL;
1597 kfree(data->raw_info_block);
1598 data->raw_info_block = NULL;
1599 kfree(data->msg_buf);
1600 data->msg_buf = NULL;
1601 data->T5_address = 0;
1602 data->T5_msg_size = 0;
1603 data->T6_reportid = 0;
1604 data->T7_address = 0;
1605 data->T71_address = 0;
1606 data->T9_reportid_min = 0;
1607 data->T9_reportid_max = 0;
1608 data->T19_reportid = 0;
1609 data->T44_address = 0;
1610 data->T100_reportid_min = 0;
1611 data->T100_reportid_max = 0;
1612 data->max_reportid = 0;
1613 }
1614
1615 static int mxt_parse_object_table(struct mxt_data *data,
1616 struct mxt_object *object_table)
1617 {
1618 struct i2c_client *client = data->client;
1619 int i;
1620 u8 reportid;
1621 u16 end_address;
1622
1623 /* Valid Report IDs start counting from 1 */
1624 reportid = 1;
1625 data->mem_size = 0;
1626 for (i = 0; i < data->info->object_num; i++) {
1627 struct mxt_object *object = object_table + i;
1628 u8 min_id, max_id;
1629
1630 le16_to_cpus(&object->start_address);
1631
1632 if (object->num_report_ids) {
1633 min_id = reportid;
1634 reportid += object->num_report_ids *
1635 mxt_obj_instances(object);
1636 max_id = reportid - 1;
1637 } else {
1638 min_id = 0;
1639 max_id = 0;
1640 }
1641
1642 dev_dbg(&data->client->dev,
1643 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1644 object->type, object->start_address,
1645 mxt_obj_size(object), mxt_obj_instances(object),
1646 min_id, max_id);
1647
1648 switch (object->type) {
1649 case MXT_GEN_MESSAGE_T5:
1650 if (data->info->family_id == 0x80 &&
1651 data->info->version < 0x20) {
1652 /*
1653 * On mXT224 firmware versions prior to V2.0
1654 * read and discard unused CRC byte otherwise
1655 * DMA reads are misaligned.
1656 */
1657 data->T5_msg_size = mxt_obj_size(object);
1658 } else {
1659 /* CRC not enabled, so skip last byte */
1660 data->T5_msg_size = mxt_obj_size(object) - 1;
1661 }
1662 data->T5_address = object->start_address;
1663 break;
1664 case MXT_GEN_COMMAND_T6:
1665 data->T6_reportid = min_id;
1666 data->T6_address = object->start_address;
1667 break;
1668 case MXT_GEN_POWER_T7:
1669 data->T7_address = object->start_address;
1670 break;
1671 case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71:
1672 data->T71_address = object->start_address;
1673 break;
1674 case MXT_TOUCH_MULTI_T9:
1675 data->multitouch = MXT_TOUCH_MULTI_T9;
1676 /* Only handle messages from first T9 instance */
1677 data->T9_reportid_min = min_id;
1678 data->T9_reportid_max = min_id +
1679 object->num_report_ids - 1;
1680 data->num_touchids = object->num_report_ids;
1681 break;
1682 case MXT_SPT_MESSAGECOUNT_T44:
1683 data->T44_address = object->start_address;
1684 break;
1685 case MXT_SPT_GPIOPWM_T19:
1686 data->T19_reportid = min_id;
1687 break;
1688 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1689 data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1690 data->T100_reportid_min = min_id;
1691 data->T100_reportid_max = max_id;
1692 /* first two report IDs reserved */
1693 data->num_touchids = object->num_report_ids - 2;
1694 break;
1695 }
1696
1697 end_address = object->start_address
1698 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1699
1700 if (end_address >= data->mem_size)
1701 data->mem_size = end_address + 1;
1702 }
1703
1704 /* Store maximum reportid */
1705 data->max_reportid = reportid;
1706
1707 /* If T44 exists, T5 position has to be directly after */
1708 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1709 dev_err(&client->dev, "Invalid T44 position\n");
1710 return -EINVAL;
1711 }
1712
1713 data->msg_buf = kcalloc(data->max_reportid,
1714 data->T5_msg_size, GFP_KERNEL);
1715 if (!data->msg_buf)
1716 return -ENOMEM;
1717
1718 return 0;
1719 }
1720
1721 static int mxt_read_info_block(struct mxt_data *data)
1722 {
1723 struct i2c_client *client = data->client;
1724 int error;
1725 size_t size;
1726 void *id_buf, *buf;
1727 uint8_t num_objects;
1728 u32 calculated_crc;
1729 u8 *crc_ptr;
1730
1731 /* If info block already allocated, free it */
1732 if (data->raw_info_block)
1733 mxt_free_object_table(data);
1734
1735 /* Read 7-byte ID information block starting at address 0 */
1736 size = sizeof(struct mxt_info);
1737 id_buf = kzalloc(size, GFP_KERNEL);
1738 if (!id_buf)
1739 return -ENOMEM;
1740
1741 error = __mxt_read_reg(client, 0, size, id_buf);
1742 if (error)
1743 goto err_free_mem;
1744
1745 /* Resize buffer to give space for rest of info block */
1746 num_objects = ((struct mxt_info *)id_buf)->object_num;
1747 size += (num_objects * sizeof(struct mxt_object))
1748 + MXT_INFO_CHECKSUM_SIZE;
1749
1750 buf = krealloc(id_buf, size, GFP_KERNEL);
1751 if (!buf) {
1752 error = -ENOMEM;
1753 goto err_free_mem;
1754 }
1755 id_buf = buf;
1756
1757 /* Read rest of info block */
1758 error = __mxt_read_reg(client, MXT_OBJECT_START,
1759 size - MXT_OBJECT_START,
1760 id_buf + MXT_OBJECT_START);
1761 if (error)
1762 goto err_free_mem;
1763
1764 /* Extract & calculate checksum */
1765 crc_ptr = id_buf + size - MXT_INFO_CHECKSUM_SIZE;
1766 data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16);
1767
1768 calculated_crc = mxt_calculate_crc(id_buf, 0,
1769 size - MXT_INFO_CHECKSUM_SIZE);
1770
1771 /*
1772 * CRC mismatch can be caused by data corruption due to I2C comms
1773 * issue or else device is not using Object Based Protocol (eg i2c-hid)
1774 */
1775 if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) {
1776 dev_err(&client->dev,
1777 "Info Block CRC error calculated=0x%06X read=0x%06X\n",
1778 calculated_crc, data->info_crc);
1779 error = -EIO;
1780 goto err_free_mem;
1781 }
1782
1783 data->raw_info_block = id_buf;
1784 data->info = (struct mxt_info *)id_buf;
1785
1786 dev_info(&client->dev,
1787 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
1788 data->info->family_id, data->info->variant_id,
1789 data->info->version >> 4, data->info->version & 0xf,
1790 data->info->build, data->info->object_num);
1791
1792 /* Parse object table information */
1793 error = mxt_parse_object_table(data, id_buf + MXT_OBJECT_START);
1794 if (error) {
1795 dev_err(&client->dev, "Error %d parsing object table\n", error);
1796 mxt_free_object_table(data);
1797 goto err_free_mem;
1798 }
1799
1800 data->object_table = (struct mxt_object *)(id_buf + MXT_OBJECT_START);
1801
1802 return 0;
1803
1804 err_free_mem:
1805 kfree(id_buf);
1806 return error;
1807 }
1808
1809 static int mxt_read_t9_resolution(struct mxt_data *data)
1810 {
1811 struct i2c_client *client = data->client;
1812 int error;
1813 struct t9_range range;
1814 unsigned char orient;
1815 struct mxt_object *object;
1816
1817 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1818 if (!object)
1819 return -EINVAL;
1820
1821 error = __mxt_read_reg(client,
1822 object->start_address + MXT_T9_XSIZE,
1823 sizeof(data->xsize), &data->xsize);
1824 if (error)
1825 return error;
1826
1827 error = __mxt_read_reg(client,
1828 object->start_address + MXT_T9_YSIZE,
1829 sizeof(data->ysize), &data->ysize);
1830 if (error)
1831 return error;
1832
1833 error = __mxt_read_reg(client,
1834 object->start_address + MXT_T9_RANGE,
1835 sizeof(range), &range);
1836 if (error)
1837 return error;
1838
1839 data->max_x = get_unaligned_le16(&range.x);
1840 data->max_y = get_unaligned_le16(&range.y);
1841
1842 error = __mxt_read_reg(client,
1843 object->start_address + MXT_T9_ORIENT,
1844 1, &orient);
1845 if (error)
1846 return error;
1847
1848 data->xy_switch = orient & MXT_T9_ORIENT_SWITCH;
1849 data->invertx = orient & MXT_T9_ORIENT_INVERTX;
1850 data->inverty = orient & MXT_T9_ORIENT_INVERTY;
1851
1852 return 0;
1853 }
1854
1855 static int mxt_read_t100_config(struct mxt_data *data)
1856 {
1857 struct i2c_client *client = data->client;
1858 int error;
1859 struct mxt_object *object;
1860 u16 range_x, range_y;
1861 u8 cfg, tchaux;
1862 u8 aux;
1863
1864 object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1865 if (!object)
1866 return -EINVAL;
1867
1868 /* read touchscreen dimensions */
1869 error = __mxt_read_reg(client,
1870 object->start_address + MXT_T100_XRANGE,
1871 sizeof(range_x), &range_x);
1872 if (error)
1873 return error;
1874
1875 data->max_x = get_unaligned_le16(&range_x);
1876
1877 error = __mxt_read_reg(client,
1878 object->start_address + MXT_T100_YRANGE,
1879 sizeof(range_y), &range_y);
1880 if (error)
1881 return error;
1882
1883 data->max_y = get_unaligned_le16(&range_y);
1884
1885 error = __mxt_read_reg(client,
1886 object->start_address + MXT_T100_XSIZE,
1887 sizeof(data->xsize), &data->xsize);
1888 if (error)
1889 return error;
1890
1891 error = __mxt_read_reg(client,
1892 object->start_address + MXT_T100_YSIZE,
1893 sizeof(data->ysize), &data->ysize);
1894 if (error)
1895 return error;
1896
1897 /* read orientation config */
1898 error = __mxt_read_reg(client,
1899 object->start_address + MXT_T100_CFG1,
1900 1, &cfg);
1901 if (error)
1902 return error;
1903
1904 data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY;
1905 data->invertx = cfg & MXT_T100_CFG_INVERTX;
1906 data->inverty = cfg & MXT_T100_CFG_INVERTY;
1907
1908 /* allocate aux bytes */
1909 error = __mxt_read_reg(client,
1910 object->start_address + MXT_T100_TCHAUX,
1911 1, &tchaux);
1912 if (error)
1913 return error;
1914
1915 aux = 6;
1916
1917 if (tchaux & MXT_T100_TCHAUX_VECT)
1918 data->t100_aux_vect = aux++;
1919
1920 if (tchaux & MXT_T100_TCHAUX_AMPL)
1921 data->t100_aux_ampl = aux++;
1922
1923 if (tchaux & MXT_T100_TCHAUX_AREA)
1924 data->t100_aux_area = aux++;
1925
1926 dev_dbg(&client->dev,
1927 "T100 aux mappings vect:%u ampl:%u area:%u\n",
1928 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
1929
1930 return 0;
1931 }
1932
1933 static int mxt_input_open(struct input_dev *dev);
1934 static void mxt_input_close(struct input_dev *dev);
1935
1936 static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
1937 struct mxt_data *data)
1938 {
1939 int i;
1940
1941 input_dev->name = "Atmel maXTouch Touchpad";
1942
1943 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1944
1945 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1946 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1947 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1948 MXT_PIXELS_PER_MM);
1949 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1950 MXT_PIXELS_PER_MM);
1951
1952 for (i = 0; i < data->t19_num_keys; i++)
1953 if (data->t19_keymap[i] != KEY_RESERVED)
1954 input_set_capability(input_dev, EV_KEY,
1955 data->t19_keymap[i]);
1956 }
1957
1958 static int mxt_initialize_input_device(struct mxt_data *data)
1959 {
1960 struct device *dev = &data->client->dev;
1961 struct input_dev *input_dev;
1962 int error;
1963 unsigned int num_mt_slots;
1964 unsigned int mt_flags = 0;
1965
1966 switch (data->multitouch) {
1967 case MXT_TOUCH_MULTI_T9:
1968 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1969 error = mxt_read_t9_resolution(data);
1970 if (error)
1971 dev_warn(dev, "Failed to initialize T9 resolution\n");
1972 break;
1973
1974 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1975 num_mt_slots = data->num_touchids;
1976 error = mxt_read_t100_config(data);
1977 if (error)
1978 dev_warn(dev, "Failed to read T100 config\n");
1979 break;
1980
1981 default:
1982 dev_err(dev, "Invalid multitouch object\n");
1983 return -EINVAL;
1984 }
1985
1986 /* Handle default values and orientation switch */
1987 if (data->max_x == 0)
1988 data->max_x = 1023;
1989
1990 if (data->max_y == 0)
1991 data->max_y = 1023;
1992
1993 if (data->xy_switch)
1994 swap(data->max_x, data->max_y);
1995
1996 dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1997
1998 /* Register input device */
1999 input_dev = input_allocate_device();
2000 if (!input_dev)
2001 return -ENOMEM;
2002
2003 input_dev->name = "Atmel maXTouch Touchscreen";
2004 input_dev->phys = data->phys;
2005 input_dev->id.bustype = BUS_I2C;
2006 input_dev->dev.parent = dev;
2007 input_dev->open = mxt_input_open;
2008 input_dev->close = mxt_input_close;
2009
2010 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
2011
2012 /* For single touch */
2013 input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
2014 input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
2015
2016 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2017 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2018 data->t100_aux_ampl)) {
2019 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
2020 }
2021
2022 /* If device has buttons we assume it is a touchpad */
2023 if (data->t19_num_keys) {
2024 mxt_set_up_as_touchpad(input_dev, data);
2025 mt_flags |= INPUT_MT_POINTER;
2026 } else {
2027 mt_flags |= INPUT_MT_DIRECT;
2028 }
2029
2030 /* For multi touch */
2031 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
2032 if (error) {
2033 dev_err(dev, "Error %d initialising slots\n", error);
2034 goto err_free_mem;
2035 }
2036
2037 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
2038 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
2039 0, MT_TOOL_MAX, 0, 0);
2040 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
2041 MXT_DISTANCE_ACTIVE_TOUCH,
2042 MXT_DISTANCE_HOVERING,
2043 0, 0);
2044 }
2045
2046 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
2047 0, data->max_x, 0, 0);
2048 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
2049 0, data->max_y, 0, 0);
2050
2051 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2052 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2053 data->t100_aux_area)) {
2054 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
2055 0, MXT_MAX_AREA, 0, 0);
2056 }
2057
2058 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2059 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2060 data->t100_aux_ampl)) {
2061 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
2062 0, 255, 0, 0);
2063 }
2064
2065 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2066 data->t100_aux_vect) {
2067 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
2068 0, 255, 0, 0);
2069 }
2070
2071 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2072 data->t100_aux_vect) {
2073 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
2074 0, 255, 0, 0);
2075 }
2076
2077 input_set_drvdata(input_dev, data);
2078
2079 error = input_register_device(input_dev);
2080 if (error) {
2081 dev_err(dev, "Error %d registering input device\n", error);
2082 goto err_free_mem;
2083 }
2084
2085 data->input_dev = input_dev;
2086
2087 return 0;
2088
2089 err_free_mem:
2090 input_free_device(input_dev);
2091 return error;
2092 }
2093
2094 static int mxt_configure_objects(struct mxt_data *data,
2095 const struct firmware *cfg);
2096
2097 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
2098 {
2099 mxt_configure_objects(ctx, cfg);
2100 release_firmware(cfg);
2101 }
2102
2103 static int mxt_initialize(struct mxt_data *data)
2104 {
2105 struct i2c_client *client = data->client;
2106 int recovery_attempts = 0;
2107 int error;
2108
2109 while (1) {
2110 error = mxt_read_info_block(data);
2111 if (!error)
2112 break;
2113
2114 /* Check bootloader state */
2115 error = mxt_probe_bootloader(data, false);
2116 if (error) {
2117 dev_info(&client->dev, "Trying alternate bootloader address\n");
2118 error = mxt_probe_bootloader(data, true);
2119 if (error) {
2120 /* Chip is not in appmode or bootloader mode */
2121 return error;
2122 }
2123 }
2124
2125 /* OK, we are in bootloader, see if we can recover */
2126 if (++recovery_attempts > 1) {
2127 dev_err(&client->dev, "Could not recover from bootloader mode\n");
2128 /*
2129 * We can reflash from this state, so do not
2130 * abort initialization.
2131 */
2132 data->in_bootloader = true;
2133 return 0;
2134 }
2135
2136 /* Attempt to exit bootloader into app mode */
2137 mxt_send_bootloader_cmd(data, false);
2138 msleep(MXT_FW_RESET_TIME);
2139 }
2140
2141 error = mxt_acquire_irq(data);
2142 if (error)
2143 return error;
2144
2145 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
2146 &client->dev, GFP_KERNEL, data,
2147 mxt_config_cb);
2148 if (error) {
2149 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
2150 error);
2151 return error;
2152 }
2153
2154 return 0;
2155 }
2156
2157 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2158 {
2159 struct device *dev = &data->client->dev;
2160 int error;
2161 struct t7_config *new_config;
2162 struct t7_config deepsleep = { .active = 0, .idle = 0 };
2163
2164 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2165 new_config = &deepsleep;
2166 else
2167 new_config = &data->t7_cfg;
2168
2169 error = __mxt_write_reg(data->client, data->T7_address,
2170 sizeof(data->t7_cfg), new_config);
2171 if (error)
2172 return error;
2173
2174 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2175 new_config->active, new_config->idle);
2176
2177 return 0;
2178 }
2179
2180 static int mxt_init_t7_power_cfg(struct mxt_data *data)
2181 {
2182 struct device *dev = &data->client->dev;
2183 int error;
2184 bool retry = false;
2185
2186 recheck:
2187 error = __mxt_read_reg(data->client, data->T7_address,
2188 sizeof(data->t7_cfg), &data->t7_cfg);
2189 if (error)
2190 return error;
2191
2192 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2193 if (!retry) {
2194 dev_dbg(dev, "T7 cfg zero, resetting\n");
2195 mxt_soft_reset(data);
2196 retry = true;
2197 goto recheck;
2198 } else {
2199 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2200 data->t7_cfg.active = 20;
2201 data->t7_cfg.idle = 100;
2202 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2203 }
2204 }
2205
2206 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2207 data->t7_cfg.active, data->t7_cfg.idle);
2208 return 0;
2209 }
2210
2211 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
2212 static const struct v4l2_file_operations mxt_video_fops = {
2213 .owner = THIS_MODULE,
2214 .open = v4l2_fh_open,
2215 .release = vb2_fop_release,
2216 .unlocked_ioctl = video_ioctl2,
2217 .read = vb2_fop_read,
2218 .mmap = vb2_fop_mmap,
2219 .poll = vb2_fop_poll,
2220 };
2221
2222 static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
2223 unsigned int y)
2224 {
2225 struct mxt_info *info = data->info;
2226 struct mxt_dbg *dbg = &data->dbg;
2227 unsigned int ofs, page;
2228 unsigned int col = 0;
2229 unsigned int col_width;
2230
2231 if (info->family_id == MXT_FAMILY_1386) {
2232 col_width = info->matrix_ysize / MXT1386_COLUMNS;
2233 col = y / col_width;
2234 y = y % col_width;
2235 } else {
2236 col_width = info->matrix_ysize;
2237 }
2238
2239 ofs = (y + (x * col_width)) * sizeof(u16);
2240 page = ofs / MXT_DIAGNOSTIC_SIZE;
2241 ofs %= MXT_DIAGNOSTIC_SIZE;
2242
2243 if (info->family_id == MXT_FAMILY_1386)
2244 page += col * MXT1386_PAGES_PER_COLUMN;
2245
2246 return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
2247 }
2248
2249 static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf)
2250 {
2251 struct mxt_dbg *dbg = &data->dbg;
2252 unsigned int x = 0;
2253 unsigned int y = 0;
2254 unsigned int i, rx, ry;
2255
2256 for (i = 0; i < dbg->t37_nodes; i++) {
2257 /* Handle orientation */
2258 rx = data->xy_switch ? y : x;
2259 ry = data->xy_switch ? x : y;
2260 rx = data->invertx ? (data->xsize - 1 - rx) : rx;
2261 ry = data->inverty ? (data->ysize - 1 - ry) : ry;
2262
2263 outbuf[i] = mxt_get_debug_value(data, rx, ry);
2264
2265 /* Next value */
2266 if (++x >= (data->xy_switch ? data->ysize : data->xsize)) {
2267 x = 0;
2268 y++;
2269 }
2270 }
2271
2272 return 0;
2273 }
2274
2275 static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode,
2276 u16 *outbuf)
2277 {
2278 struct mxt_dbg *dbg = &data->dbg;
2279 int retries = 0;
2280 int page;
2281 int ret;
2282 u8 cmd = mode;
2283 struct t37_debug *p;
2284 u8 cmd_poll;
2285
2286 for (page = 0; page < dbg->t37_pages; page++) {
2287 p = dbg->t37_buf + page;
2288
2289 ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
2290 cmd);
2291 if (ret)
2292 return ret;
2293
2294 retries = 0;
2295 msleep(20);
2296 wait_cmd:
2297 /* Read back command byte */
2298 ret = __mxt_read_reg(data->client, dbg->diag_cmd_address,
2299 sizeof(cmd_poll), &cmd_poll);
2300 if (ret)
2301 return ret;
2302
2303 /* Field is cleared once the command has been processed */
2304 if (cmd_poll) {
2305 if (retries++ > 100)
2306 return -EINVAL;
2307
2308 msleep(20);
2309 goto wait_cmd;
2310 }
2311
2312 /* Read T37 page */
2313 ret = __mxt_read_reg(data->client, dbg->t37_address,
2314 sizeof(struct t37_debug), p);
2315 if (ret)
2316 return ret;
2317
2318 if (p->mode != mode || p->page != page) {
2319 dev_err(&data->client->dev, "T37 page mismatch\n");
2320 return -EINVAL;
2321 }
2322
2323 dev_dbg(&data->client->dev, "%s page:%d retries:%d\n",
2324 __func__, page, retries);
2325
2326 /* For remaining pages, write PAGEUP rather than mode */
2327 cmd = MXT_DIAGNOSTIC_PAGEUP;
2328 }
2329
2330 return mxt_convert_debug_pages(data, outbuf);
2331 }
2332
2333 static int mxt_queue_setup(struct vb2_queue *q,
2334 unsigned int *nbuffers, unsigned int *nplanes,
2335 unsigned int sizes[], struct device *alloc_devs[])
2336 {
2337 struct mxt_data *data = q->drv_priv;
2338 size_t size = data->dbg.t37_nodes * sizeof(u16);
2339
2340 if (*nplanes)
2341 return sizes[0] < size ? -EINVAL : 0;
2342
2343 *nplanes = 1;
2344 sizes[0] = size;
2345
2346 return 0;
2347 }
2348
2349 static void mxt_buffer_queue(struct vb2_buffer *vb)
2350 {
2351 struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue);
2352 u16 *ptr;
2353 int ret;
2354 u8 mode;
2355
2356 ptr = vb2_plane_vaddr(vb, 0);
2357 if (!ptr) {
2358 dev_err(&data->client->dev, "Error acquiring frame ptr\n");
2359 goto fault;
2360 }
2361
2362 switch (data->dbg.input) {
2363 case MXT_V4L_INPUT_DELTAS:
2364 default:
2365 mode = MXT_DIAGNOSTIC_DELTAS;
2366 break;
2367
2368 case MXT_V4L_INPUT_REFS:
2369 mode = MXT_DIAGNOSTIC_REFS;
2370 break;
2371 }
2372
2373 ret = mxt_read_diagnostic_debug(data, mode, ptr);
2374 if (ret)
2375 goto fault;
2376
2377 vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16));
2378 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
2379 return;
2380
2381 fault:
2382 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
2383 }
2384
2385 /* V4L2 structures */
2386 static const struct vb2_ops mxt_queue_ops = {
2387 .queue_setup = mxt_queue_setup,
2388 .buf_queue = mxt_buffer_queue,
2389 .wait_prepare = vb2_ops_wait_prepare,
2390 .wait_finish = vb2_ops_wait_finish,
2391 };
2392
2393 static const struct vb2_queue mxt_queue = {
2394 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2395 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
2396 .buf_struct_size = sizeof(struct mxt_vb2_buffer),
2397 .ops = &mxt_queue_ops,
2398 .mem_ops = &vb2_vmalloc_memops,
2399 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
2400 .min_buffers_needed = 1,
2401 };
2402
2403 static int mxt_vidioc_querycap(struct file *file, void *priv,
2404 struct v4l2_capability *cap)
2405 {
2406 struct mxt_data *data = video_drvdata(file);
2407
2408 strlcpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver));
2409 strlcpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card));
2410 snprintf(cap->bus_info, sizeof(cap->bus_info),
2411 "I2C:%s", dev_name(&data->client->dev));
2412 return 0;
2413 }
2414
2415 static int mxt_vidioc_enum_input(struct file *file, void *priv,
2416 struct v4l2_input *i)
2417 {
2418 if (i->index >= MXT_V4L_INPUT_MAX)
2419 return -EINVAL;
2420
2421 i->type = V4L2_INPUT_TYPE_TOUCH;
2422
2423 switch (i->index) {
2424 case MXT_V4L_INPUT_REFS:
2425 strlcpy(i->name, "Mutual Capacitance References",
2426 sizeof(i->name));
2427 break;
2428 case MXT_V4L_INPUT_DELTAS:
2429 strlcpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name));
2430 break;
2431 }
2432
2433 return 0;
2434 }
2435
2436 static int mxt_set_input(struct mxt_data *data, unsigned int i)
2437 {
2438 struct v4l2_pix_format *f = &data->dbg.format;
2439
2440 if (i >= MXT_V4L_INPUT_MAX)
2441 return -EINVAL;
2442
2443 if (i == MXT_V4L_INPUT_DELTAS)
2444 f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2445 else
2446 f->pixelformat = V4L2_TCH_FMT_TU16;
2447
2448 f->width = data->xy_switch ? data->ysize : data->xsize;
2449 f->height = data->xy_switch ? data->xsize : data->ysize;
2450 f->field = V4L2_FIELD_NONE;
2451 f->colorspace = V4L2_COLORSPACE_RAW;
2452 f->bytesperline = f->width * sizeof(u16);
2453 f->sizeimage = f->width * f->height * sizeof(u16);
2454
2455 data->dbg.input = i;
2456
2457 return 0;
2458 }
2459
2460 static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i)
2461 {
2462 return mxt_set_input(video_drvdata(file), i);
2463 }
2464
2465 static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
2466 {
2467 struct mxt_data *data = video_drvdata(file);
2468
2469 *i = data->dbg.input;
2470
2471 return 0;
2472 }
2473
2474 static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f)
2475 {
2476 struct mxt_data *data = video_drvdata(file);
2477
2478 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2479 f->fmt.pix = data->dbg.format;
2480
2481 return 0;
2482 }
2483
2484 static int mxt_vidioc_enum_fmt(struct file *file, void *priv,
2485 struct v4l2_fmtdesc *fmt)
2486 {
2487 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2488 return -EINVAL;
2489
2490 switch (fmt->index) {
2491 case 0:
2492 fmt->pixelformat = V4L2_TCH_FMT_TU16;
2493 break;
2494
2495 case 1:
2496 fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2497 break;
2498
2499 default:
2500 return -EINVAL;
2501 }
2502
2503 return 0;
2504 }
2505
2506 static int mxt_vidioc_g_parm(struct file *file, void *fh,
2507 struct v4l2_streamparm *a)
2508 {
2509 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2510 return -EINVAL;
2511
2512 a->parm.capture.readbuffers = 1;
2513 a->parm.capture.timeperframe.numerator = 1;
2514 a->parm.capture.timeperframe.denominator = 10;
2515 return 0;
2516 }
2517
2518 static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = {
2519 .vidioc_querycap = mxt_vidioc_querycap,
2520
2521 .vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt,
2522 .vidioc_s_fmt_vid_cap = mxt_vidioc_fmt,
2523 .vidioc_g_fmt_vid_cap = mxt_vidioc_fmt,
2524 .vidioc_try_fmt_vid_cap = mxt_vidioc_fmt,
2525 .vidioc_g_parm = mxt_vidioc_g_parm,
2526
2527 .vidioc_enum_input = mxt_vidioc_enum_input,
2528 .vidioc_g_input = mxt_vidioc_g_input,
2529 .vidioc_s_input = mxt_vidioc_s_input,
2530
2531 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2532 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2533 .vidioc_querybuf = vb2_ioctl_querybuf,
2534 .vidioc_qbuf = vb2_ioctl_qbuf,
2535 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2536 .vidioc_expbuf = vb2_ioctl_expbuf,
2537
2538 .vidioc_streamon = vb2_ioctl_streamon,
2539 .vidioc_streamoff = vb2_ioctl_streamoff,
2540 };
2541
2542 static const struct video_device mxt_video_device = {
2543 .name = "Atmel maxTouch",
2544 .fops = &mxt_video_fops,
2545 .ioctl_ops = &mxt_video_ioctl_ops,
2546 .release = video_device_release_empty,
2547 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
2548 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
2549 };
2550
2551 static void mxt_debug_init(struct mxt_data *data)
2552 {
2553 struct mxt_info *info = data->info;
2554 struct mxt_dbg *dbg = &data->dbg;
2555 struct mxt_object *object;
2556 int error;
2557
2558 object = mxt_get_object(data, MXT_GEN_COMMAND_T6);
2559 if (!object)
2560 goto error;
2561
2562 dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC;
2563
2564 object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37);
2565 if (!object)
2566 goto error;
2567
2568 if (mxt_obj_size(object) != sizeof(struct t37_debug)) {
2569 dev_warn(&data->client->dev, "Bad T37 size");
2570 goto error;
2571 }
2572
2573 dbg->t37_address = object->start_address;
2574
2575 /* Calculate size of data and allocate buffer */
2576 dbg->t37_nodes = data->xsize * data->ysize;
2577
2578 if (info->family_id == MXT_FAMILY_1386)
2579 dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN;
2580 else
2581 dbg->t37_pages = DIV_ROUND_UP(data->xsize *
2582 info->matrix_ysize *
2583 sizeof(u16),
2584 sizeof(dbg->t37_buf->data));
2585
2586 dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
2587 sizeof(struct t37_debug), GFP_KERNEL);
2588 if (!dbg->t37_buf)
2589 goto error;
2590
2591 /* init channel to zero */
2592 mxt_set_input(data, 0);
2593
2594 /* register video device */
2595 snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s", "atmel_mxt_ts");
2596 error = v4l2_device_register(&data->client->dev, &dbg->v4l2);
2597 if (error)
2598 goto error;
2599
2600 /* initialize the queue */
2601 mutex_init(&dbg->lock);
2602 dbg->queue = mxt_queue;
2603 dbg->queue.drv_priv = data;
2604 dbg->queue.lock = &dbg->lock;
2605 dbg->queue.dev = &data->client->dev;
2606
2607 error = vb2_queue_init(&dbg->queue);
2608 if (error)
2609 goto error_unreg_v4l2;
2610
2611 dbg->vdev = mxt_video_device;
2612 dbg->vdev.v4l2_dev = &dbg->v4l2;
2613 dbg->vdev.lock = &dbg->lock;
2614 dbg->vdev.vfl_dir = VFL_DIR_RX;
2615 dbg->vdev.queue = &dbg->queue;
2616 video_set_drvdata(&dbg->vdev, data);
2617
2618 error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1);
2619 if (error)
2620 goto error_unreg_v4l2;
2621
2622 return;
2623
2624 error_unreg_v4l2:
2625 v4l2_device_unregister(&dbg->v4l2);
2626 error:
2627 dev_warn(&data->client->dev, "Error initializing T37\n");
2628 }
2629 #else
2630 static void mxt_debug_init(struct mxt_data *data)
2631 {
2632 }
2633 #endif
2634
2635 static int mxt_configure_objects(struct mxt_data *data,
2636 const struct firmware *cfg)
2637 {
2638 struct device *dev = &data->client->dev;
2639 int error;
2640
2641 error = mxt_init_t7_power_cfg(data);
2642 if (error) {
2643 dev_err(dev, "Failed to initialize power cfg\n");
2644 return error;
2645 }
2646
2647 if (cfg) {
2648 error = mxt_update_cfg(data, cfg);
2649 if (error)
2650 dev_warn(dev, "Error %d updating config\n", error);
2651 }
2652
2653 if (data->multitouch) {
2654 error = mxt_initialize_input_device(data);
2655 if (error)
2656 return error;
2657 } else {
2658 dev_warn(dev, "No touch object detected\n");
2659 }
2660
2661 mxt_debug_init(data);
2662
2663 return 0;
2664 }
2665
2666 /* Firmware Version is returned as Major.Minor.Build */
2667 static ssize_t mxt_fw_version_show(struct device *dev,
2668 struct device_attribute *attr, char *buf)
2669 {
2670 struct mxt_data *data = dev_get_drvdata(dev);
2671 struct mxt_info *info = data->info;
2672 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
2673 info->version >> 4, info->version & 0xf, info->build);
2674 }
2675
2676 /* Hardware Version is returned as FamilyID.VariantID */
2677 static ssize_t mxt_hw_version_show(struct device *dev,
2678 struct device_attribute *attr, char *buf)
2679 {
2680 struct mxt_data *data = dev_get_drvdata(dev);
2681 struct mxt_info *info = data->info;
2682 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
2683 info->family_id, info->variant_id);
2684 }
2685
2686 static ssize_t mxt_show_instance(char *buf, int count,
2687 struct mxt_object *object, int instance,
2688 const u8 *val)
2689 {
2690 int i;
2691
2692 if (mxt_obj_instances(object) > 1)
2693 count += scnprintf(buf + count, PAGE_SIZE - count,
2694 "Instance %u\n", instance);
2695
2696 for (i = 0; i < mxt_obj_size(object); i++)
2697 count += scnprintf(buf + count, PAGE_SIZE - count,
2698 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
2699 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
2700
2701 return count;
2702 }
2703
2704 static ssize_t mxt_object_show(struct device *dev,
2705 struct device_attribute *attr, char *buf)
2706 {
2707 struct mxt_data *data = dev_get_drvdata(dev);
2708 struct mxt_object *object;
2709 int count = 0;
2710 int i, j;
2711 int error;
2712 u8 *obuf;
2713
2714 /* Pre-allocate buffer large enough to hold max sized object. */
2715 obuf = kmalloc(256, GFP_KERNEL);
2716 if (!obuf)
2717 return -ENOMEM;
2718
2719 error = 0;
2720 for (i = 0; i < data->info->object_num; i++) {
2721 object = data->object_table + i;
2722
2723 if (!mxt_object_readable(object->type))
2724 continue;
2725
2726 count += scnprintf(buf + count, PAGE_SIZE - count,
2727 "T%u:\n", object->type);
2728
2729 for (j = 0; j < mxt_obj_instances(object); j++) {
2730 u16 size = mxt_obj_size(object);
2731 u16 addr = object->start_address + j * size;
2732
2733 error = __mxt_read_reg(data->client, addr, size, obuf);
2734 if (error)
2735 goto done;
2736
2737 count = mxt_show_instance(buf, count, object, j, obuf);
2738 }
2739 }
2740
2741 done:
2742 kfree(obuf);
2743 return error ?: count;
2744 }
2745
2746 static int mxt_check_firmware_format(struct device *dev,
2747 const struct firmware *fw)
2748 {
2749 unsigned int pos = 0;
2750 char c;
2751
2752 while (pos < fw->size) {
2753 c = *(fw->data + pos);
2754
2755 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2756 return 0;
2757
2758 pos++;
2759 }
2760
2761 /*
2762 * To convert file try:
2763 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2764 */
2765 dev_err(dev, "Aborting: firmware file must be in binary format\n");
2766
2767 return -EINVAL;
2768 }
2769
2770 static int mxt_load_fw(struct device *dev, const char *fn)
2771 {
2772 struct mxt_data *data = dev_get_drvdata(dev);
2773 const struct firmware *fw = NULL;
2774 unsigned int frame_size;
2775 unsigned int pos = 0;
2776 unsigned int retry = 0;
2777 unsigned int frame = 0;
2778 int ret;
2779
2780 ret = request_firmware(&fw, fn, dev);
2781 if (ret) {
2782 dev_err(dev, "Unable to open firmware %s\n", fn);
2783 return ret;
2784 }
2785
2786 /* Check for incorrect enc file */
2787 ret = mxt_check_firmware_format(dev, fw);
2788 if (ret)
2789 goto release_firmware;
2790
2791 if (!data->in_bootloader) {
2792 /* Change to the bootloader mode */
2793 data->in_bootloader = true;
2794
2795 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2796 MXT_BOOT_VALUE, false);
2797 if (ret)
2798 goto release_firmware;
2799
2800 msleep(MXT_RESET_TIME);
2801
2802 /* Do not need to scan since we know family ID */
2803 ret = mxt_lookup_bootloader_address(data, 0);
2804 if (ret)
2805 goto release_firmware;
2806
2807 mxt_free_input_device(data);
2808 mxt_free_object_table(data);
2809 } else {
2810 enable_irq(data->irq);
2811 }
2812
2813 reinit_completion(&data->bl_completion);
2814
2815 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2816 if (ret) {
2817 /* Bootloader may still be unlocked from previous attempt */
2818 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2819 if (ret)
2820 goto disable_irq;
2821 } else {
2822 dev_info(dev, "Unlocking bootloader\n");
2823
2824 /* Unlock bootloader */
2825 ret = mxt_send_bootloader_cmd(data, true);
2826 if (ret)
2827 goto disable_irq;
2828 }
2829
2830 while (pos < fw->size) {
2831 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
2832 if (ret)
2833 goto disable_irq;
2834
2835 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2836
2837 /* Take account of CRC bytes */
2838 frame_size += 2;
2839
2840 /* Write one frame to device */
2841 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2842 if (ret)
2843 goto disable_irq;
2844
2845 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
2846 if (ret) {
2847 retry++;
2848
2849 /* Back off by 20ms per retry */
2850 msleep(retry * 20);
2851
2852 if (retry > 20) {
2853 dev_err(dev, "Retry count exceeded\n");
2854 goto disable_irq;
2855 }
2856 } else {
2857 retry = 0;
2858 pos += frame_size;
2859 frame++;
2860 }
2861
2862 if (frame % 50 == 0)
2863 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2864 frame, pos, fw->size);
2865 }
2866
2867 /* Wait for flash. */
2868 ret = mxt_wait_for_completion(data, &data->bl_completion,
2869 MXT_FW_RESET_TIME);
2870 if (ret)
2871 goto disable_irq;
2872
2873 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2874
2875 /*
2876 * Wait for device to reset. Some bootloader versions do not assert
2877 * the CHG line after bootloading has finished, so ignore potential
2878 * errors.
2879 */
2880 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
2881
2882 data->in_bootloader = false;
2883
2884 disable_irq:
2885 disable_irq(data->irq);
2886 release_firmware:
2887 release_firmware(fw);
2888 return ret;
2889 }
2890
2891 static ssize_t mxt_update_fw_store(struct device *dev,
2892 struct device_attribute *attr,
2893 const char *buf, size_t count)
2894 {
2895 struct mxt_data *data = dev_get_drvdata(dev);
2896 int error;
2897
2898 error = mxt_load_fw(dev, MXT_FW_NAME);
2899 if (error) {
2900 dev_err(dev, "The firmware update failed(%d)\n", error);
2901 count = error;
2902 } else {
2903 dev_info(dev, "The firmware update succeeded\n");
2904
2905 error = mxt_initialize(data);
2906 if (error)
2907 return error;
2908 }
2909
2910 return count;
2911 }
2912
2913 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2914 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
2915 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2916 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
2917
2918 static struct attribute *mxt_attrs[] = {
2919 &dev_attr_fw_version.attr,
2920 &dev_attr_hw_version.attr,
2921 &dev_attr_object.attr,
2922 &dev_attr_update_fw.attr,
2923 NULL
2924 };
2925
2926 static const struct attribute_group mxt_attr_group = {
2927 .attrs = mxt_attrs,
2928 };
2929
2930 static void mxt_start(struct mxt_data *data)
2931 {
2932 switch (data->suspend_mode) {
2933 case MXT_SUSPEND_T9_CTRL:
2934 mxt_soft_reset(data);
2935
2936 /* Touch enable */
2937 /* 0x83 = SCANEN | RPTEN | ENABLE */
2938 mxt_write_object(data,
2939 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
2940 break;
2941
2942 case MXT_SUSPEND_DEEP_SLEEP:
2943 default:
2944 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2945
2946 /* Recalibrate since chip has been in deep sleep */
2947 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
2948 break;
2949 }
2950 }
2951
2952 static void mxt_stop(struct mxt_data *data)
2953 {
2954 switch (data->suspend_mode) {
2955 case MXT_SUSPEND_T9_CTRL:
2956 /* Touch disable */
2957 mxt_write_object(data,
2958 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
2959 break;
2960
2961 case MXT_SUSPEND_DEEP_SLEEP:
2962 default:
2963 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
2964 break;
2965 }
2966 }
2967
2968 static int mxt_input_open(struct input_dev *dev)
2969 {
2970 struct mxt_data *data = input_get_drvdata(dev);
2971
2972 mxt_start(data);
2973
2974 return 0;
2975 }
2976
2977 static void mxt_input_close(struct input_dev *dev)
2978 {
2979 struct mxt_data *data = input_get_drvdata(dev);
2980
2981 mxt_stop(data);
2982 }
2983
2984 static int mxt_parse_device_properties(struct mxt_data *data)
2985 {
2986 static const char keymap_property[] = "linux,gpio-keymap";
2987 struct device *dev = &data->client->dev;
2988 u32 *keymap;
2989 int n_keys;
2990 int error;
2991
2992 if (device_property_present(dev, keymap_property)) {
2993 n_keys = device_property_count_u32(dev, keymap_property);
2994 if (n_keys <= 0) {
2995 error = n_keys < 0 ? n_keys : -EINVAL;
2996 dev_err(dev, "invalid/malformed '%s' property: %d\n",
2997 keymap_property, error);
2998 return error;
2999 }
3000
3001 keymap = devm_kmalloc_array(dev, n_keys, sizeof(*keymap),
3002 GFP_KERNEL);
3003 if (!keymap)
3004 return -ENOMEM;
3005
3006 error = device_property_read_u32_array(dev, keymap_property,
3007 keymap, n_keys);
3008 if (error) {
3009 dev_err(dev, "failed to parse '%s' property: %d\n",
3010 keymap_property, error);
3011 return error;
3012 }
3013
3014 data->t19_keymap = keymap;
3015 data->t19_num_keys = n_keys;
3016 }
3017
3018 return 0;
3019 }
3020
3021 static const struct dmi_system_id chromebook_T9_suspend_dmi[] = {
3022 {
3023 .matches = {
3024 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
3025 DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
3026 },
3027 },
3028 {
3029 .matches = {
3030 DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
3031 },
3032 },
3033 { }
3034 };
3035
3036 static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
3037 {
3038 struct mxt_data *data;
3039 int error;
3040
3041 /*
3042 * Ignore devices that do not have device properties attached to
3043 * them, as we need help determining whether we are dealing with
3044 * touch screen or touchpad.
3045 *
3046 * So far on x86 the only users of Atmel touch controllers are
3047 * Chromebooks, and chromeos_laptop driver will ensure that
3048 * necessary properties are provided (if firmware does not do that).
3049 */
3050 if (!device_property_present(&client->dev, "compatible"))
3051 return -ENXIO;
3052
3053 /*
3054 * Ignore ACPI devices representing bootloader mode.
3055 *
3056 * This is a bit of a hack: Google Chromebook BIOS creates ACPI
3057 * devices for both application and bootloader modes, but we are
3058 * interested in application mode only (if device is in bootloader
3059 * mode we'll end up switching into application anyway). So far
3060 * application mode addresses were all above 0x40, so we'll use it
3061 * as a threshold.
3062 */
3063 if (ACPI_COMPANION(&client->dev) && client->addr < 0x40)
3064 return -ENXIO;
3065
3066 data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL);
3067 if (!data)
3068 return -ENOMEM;
3069
3070 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
3071 client->adapter->nr, client->addr);
3072
3073 data->client = client;
3074 data->irq = client->irq;
3075 i2c_set_clientdata(client, data);
3076
3077 init_completion(&data->bl_completion);
3078 init_completion(&data->reset_completion);
3079 init_completion(&data->crc_completion);
3080
3081 data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ?
3082 MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP;
3083
3084 error = mxt_parse_device_properties(data);
3085 if (error)
3086 return error;
3087
3088 data->reset_gpio = devm_gpiod_get_optional(&client->dev,
3089 "reset", GPIOD_OUT_LOW);
3090 if (IS_ERR(data->reset_gpio)) {
3091 error = PTR_ERR(data->reset_gpio);
3092 dev_err(&client->dev, "Failed to get reset gpio: %d\n", error);
3093 return error;
3094 }
3095
3096 error = devm_request_threaded_irq(&client->dev, client->irq,
3097 NULL, mxt_interrupt, IRQF_ONESHOT,
3098 client->name, data);
3099 if (error) {
3100 dev_err(&client->dev, "Failed to register interrupt\n");
3101 return error;
3102 }
3103
3104 disable_irq(client->irq);
3105
3106 if (data->reset_gpio) {
3107 msleep(MXT_RESET_GPIO_TIME);
3108 gpiod_set_value(data->reset_gpio, 1);
3109 msleep(MXT_RESET_INVALID_CHG);
3110 }
3111
3112 error = mxt_initialize(data);
3113 if (error)
3114 return error;
3115
3116 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
3117 if (error) {
3118 dev_err(&client->dev, "Failure %d creating sysfs group\n",
3119 error);
3120 goto err_free_object;
3121 }
3122
3123 return 0;
3124
3125 err_free_object:
3126 mxt_free_input_device(data);
3127 mxt_free_object_table(data);
3128 return error;
3129 }
3130
3131 static int mxt_remove(struct i2c_client *client)
3132 {
3133 struct mxt_data *data = i2c_get_clientdata(client);
3134
3135 disable_irq(data->irq);
3136 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
3137 mxt_free_input_device(data);
3138 mxt_free_object_table(data);
3139
3140 return 0;
3141 }
3142
3143 static int __maybe_unused mxt_suspend(struct device *dev)
3144 {
3145 struct i2c_client *client = to_i2c_client(dev);
3146 struct mxt_data *data = i2c_get_clientdata(client);
3147 struct input_dev *input_dev = data->input_dev;
3148
3149 if (!input_dev)
3150 return 0;
3151
3152 mutex_lock(&input_dev->mutex);
3153
3154 if (input_dev->users)
3155 mxt_stop(data);
3156
3157 mutex_unlock(&input_dev->mutex);
3158
3159 disable_irq(data->irq);
3160
3161 return 0;
3162 }
3163
3164 static int __maybe_unused mxt_resume(struct device *dev)
3165 {
3166 struct i2c_client *client = to_i2c_client(dev);
3167 struct mxt_data *data = i2c_get_clientdata(client);
3168 struct input_dev *input_dev = data->input_dev;
3169
3170 if (!input_dev)
3171 return 0;
3172
3173 enable_irq(data->irq);
3174
3175 mutex_lock(&input_dev->mutex);
3176
3177 if (input_dev->users)
3178 mxt_start(data);
3179
3180 mutex_unlock(&input_dev->mutex);
3181
3182 return 0;
3183 }
3184
3185 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
3186
3187 static const struct of_device_id mxt_of_match[] = {
3188 { .compatible = "atmel,maxtouch", },
3189 /* Compatibles listed below are deprecated */
3190 { .compatible = "atmel,qt602240_ts", },
3191 { .compatible = "atmel,atmel_mxt_ts", },
3192 { .compatible = "atmel,atmel_mxt_tp", },
3193 { .compatible = "atmel,mXT224", },
3194 {},
3195 };
3196 MODULE_DEVICE_TABLE(of, mxt_of_match);
3197
3198 #ifdef CONFIG_ACPI
3199 static const struct acpi_device_id mxt_acpi_id[] = {
3200 { "ATML0000", 0 }, /* Touchpad */
3201 { "ATML0001", 0 }, /* Touchscreen */
3202 { }
3203 };
3204 MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
3205 #endif
3206
3207 static const struct i2c_device_id mxt_id[] = {
3208 { "qt602240_ts", 0 },
3209 { "atmel_mxt_ts", 0 },
3210 { "atmel_mxt_tp", 0 },
3211 { "maxtouch", 0 },
3212 { "mXT224", 0 },
3213 { }
3214 };
3215 MODULE_DEVICE_TABLE(i2c, mxt_id);
3216
3217 static struct i2c_driver mxt_driver = {
3218 .driver = {
3219 .name = "atmel_mxt_ts",
3220 .of_match_table = mxt_of_match,
3221 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
3222 .pm = &mxt_pm_ops,
3223 },
3224 .probe = mxt_probe,
3225 .remove = mxt_remove,
3226 .id_table = mxt_id,
3227 };
3228
3229 module_i2c_driver(mxt_driver);
3230
3231 /* Module information */
3232 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
3233 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
3234 MODULE_LICENSE("GPL");
Linux with added FPC-III support