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drm/tests: hdmi: Fix memory leaks in drm_display_mode_from_cea_vic()
[drm/drm-misc.git] / drivers / input / touchscreen / atmel_mxt_ts.c
blob3ddabc5a2c999b2ed14353fb391552248e86b8ad
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/irq.h>
24 #include <linux/of.h>
25 #include <linux/property.h>
26 #include <linux/slab.h>
27 #include <linux/regulator/consumer.h>
28 #include <linux/gpio/consumer.h>
29 #include <linux/unaligned.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-ioctl.h>
32 #include <media/videobuf2-v4l2.h>
33 #include <media/videobuf2-vmalloc.h>
34 #include <dt-bindings/input/atmel-maxtouch.h>
35
36 /* Firmware files */
37 #define MXT_FW_NAME "maxtouch.fw"
38 #define MXT_CFG_NAME "maxtouch.cfg"
39 #define MXT_CFG_MAGIC "OBP_RAW V1"
40
41 /* Registers */
42 #define MXT_OBJECT_START 0x07
43 #define MXT_OBJECT_SIZE 6
44 #define MXT_INFO_CHECKSUM_SIZE 3
45 #define MXT_MAX_BLOCK_WRITE 256
46
47 /* Object types */
48 #define MXT_DEBUG_DIAGNOSTIC_T37 37
49 #define MXT_GEN_MESSAGE_T5 5
50 #define MXT_GEN_COMMAND_T6 6
51 #define MXT_GEN_POWER_T7 7
52 #define MXT_GEN_ACQUIRE_T8 8
53 #define MXT_GEN_DATASOURCE_T53 53
54 #define MXT_TOUCH_MULTI_T9 9
55 #define MXT_TOUCH_KEYARRAY_T15 15
56 #define MXT_TOUCH_PROXIMITY_T23 23
57 #define MXT_TOUCH_PROXKEY_T52 52
58 #define MXT_TOUCH_PTC_KEYS_T97 97
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_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 71
77 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
78
79 /* MXT_GEN_MESSAGE_T5 object */
80 #define MXT_RPTID_NOMSG 0xff
81
82 /* MXT_GEN_COMMAND_T6 field */
83 #define MXT_COMMAND_RESET 0
84 #define MXT_COMMAND_BACKUPNV 1
85 #define MXT_COMMAND_CALIBRATE 2
86 #define MXT_COMMAND_REPORTALL 3
87 #define MXT_COMMAND_DIAGNOSTIC 5
88
89 /* Define for T6 status byte */
90 #define MXT_T6_STATUS_RESET BIT(7)
91 #define MXT_T6_STATUS_OFL BIT(6)
92 #define MXT_T6_STATUS_SIGERR BIT(5)
93 #define MXT_T6_STATUS_CAL BIT(4)
94 #define MXT_T6_STATUS_CFGERR BIT(3)
95 #define MXT_T6_STATUS_COMSERR BIT(2)
96
97 /* MXT_GEN_POWER_T7 field */
98 struct t7_config {
99 u8 idle;
100 u8 active;
101 } __packed;
102
103 #define MXT_POWER_CFG_RUN 0
104 #define MXT_POWER_CFG_DEEPSLEEP 1
105
106 /* MXT_TOUCH_MULTI_T9 field */
107 #define MXT_T9_CTRL 0
108 #define MXT_T9_XSIZE 3
109 #define MXT_T9_YSIZE 4
110 #define MXT_T9_ORIENT 9
111 #define MXT_T9_RANGE 18
112
113 /* MXT_TOUCH_MULTI_T9 status */
114 #define MXT_T9_UNGRIP BIT(0)
115 #define MXT_T9_SUPPRESS BIT(1)
116 #define MXT_T9_AMP BIT(2)
117 #define MXT_T9_VECTOR BIT(3)
118 #define MXT_T9_MOVE BIT(4)
119 #define MXT_T9_RELEASE BIT(5)
120 #define MXT_T9_PRESS BIT(6)
121 #define MXT_T9_DETECT BIT(7)
122
123 struct t9_range {
124 __le16 x;
125 __le16 y;
126 } __packed;
127
128 /* MXT_TOUCH_MULTI_T9 orient */
129 #define MXT_T9_ORIENT_SWITCH BIT(0)
130 #define MXT_T9_ORIENT_INVERTX BIT(1)
131 #define MXT_T9_ORIENT_INVERTY BIT(2)
132
133 /* MXT_SPT_COMMSCONFIG_T18 */
134 #define MXT_COMMS_CTRL 0
135 #define MXT_COMMS_CMD 1
136 #define MXT_COMMS_RETRIGEN BIT(6)
137
138 /* MXT_DEBUG_DIAGNOSTIC_T37 */
139 #define MXT_DIAGNOSTIC_PAGEUP 0x01
140 #define MXT_DIAGNOSTIC_DELTAS 0x10
141 #define MXT_DIAGNOSTIC_REFS 0x11
142 #define MXT_DIAGNOSTIC_SIZE 128
143
144 #define MXT_FAMILY_1386 160
145 #define MXT1386_COLUMNS 3
146 #define MXT1386_PAGES_PER_COLUMN 8
147
148 struct t37_debug {
149 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
150 u8 mode;
151 u8 page;
152 u8 data[MXT_DIAGNOSTIC_SIZE];
153 #endif
154 };
155
156 /* Define for MXT_GEN_COMMAND_T6 */
157 #define MXT_BOOT_VALUE 0xa5
158 #define MXT_RESET_VALUE 0x01
159 #define MXT_BACKUP_VALUE 0x55
160
161 /* T100 Multiple Touch Touchscreen */
162 #define MXT_T100_CTRL 0
163 #define MXT_T100_CFG1 1
164 #define MXT_T100_TCHAUX 3
165 #define MXT_T100_XSIZE 9
166 #define MXT_T100_XRANGE 13
167 #define MXT_T100_YSIZE 20
168 #define MXT_T100_YRANGE 24
169
170 #define MXT_T100_CFG_SWITCHXY BIT(5)
171 #define MXT_T100_CFG_INVERTY BIT(6)
172 #define MXT_T100_CFG_INVERTX BIT(7)
173
174 #define MXT_T100_TCHAUX_VECT BIT(0)
175 #define MXT_T100_TCHAUX_AMPL BIT(1)
176 #define MXT_T100_TCHAUX_AREA BIT(2)
177
178 #define MXT_T100_DETECT BIT(7)
179 #define MXT_T100_TYPE_MASK 0x70
180
181 enum t100_type {
182 MXT_T100_TYPE_FINGER = 1,
183 MXT_T100_TYPE_PASSIVE_STYLUS = 2,
184 MXT_T100_TYPE_HOVERING_FINGER = 4,
185 MXT_T100_TYPE_GLOVE = 5,
186 MXT_T100_TYPE_LARGE_TOUCH = 6,
187 };
188
189 #define MXT_DISTANCE_ACTIVE_TOUCH 0
190 #define MXT_DISTANCE_HOVERING 1
191
192 #define MXT_TOUCH_MAJOR_DEFAULT 1
193 #define MXT_PRESSURE_DEFAULT 1
194
195 /* Delay times */
196 #define MXT_BACKUP_TIME 50 /* msec */
197 #define MXT_RESET_GPIO_TIME 20 /* msec */
198 #define MXT_RESET_INVALID_CHG 100 /* msec */
199 #define MXT_RESET_TIME 200 /* msec */
200 #define MXT_RESET_TIMEOUT 3000 /* msec */
201 #define MXT_CRC_TIMEOUT 1000 /* msec */
202 #define MXT_FW_RESET_TIME 3000 /* msec */
203 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
204 #define MXT_WAKEUP_TIME 25 /* msec */
205
206 /* Command to unlock bootloader */
207 #define MXT_UNLOCK_CMD_MSB 0xaa
208 #define MXT_UNLOCK_CMD_LSB 0xdc
209
210 /* Bootloader mode status */
211 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
212 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
213 #define MXT_FRAME_CRC_CHECK 0x02
214 #define MXT_FRAME_CRC_FAIL 0x03
215 #define MXT_FRAME_CRC_PASS 0x04
216 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
217 #define MXT_BOOT_STATUS_MASK 0x3f
218 #define MXT_BOOT_EXTENDED_ID BIT(5)
219 #define MXT_BOOT_ID_MASK 0x1f
220
221 /* Touchscreen absolute values */
222 #define MXT_MAX_AREA 0xff
223
224 #define MXT_PIXELS_PER_MM 20
225
226 struct mxt_info {
227 u8 family_id;
228 u8 variant_id;
229 u8 version;
230 u8 build;
231 u8 matrix_xsize;
232 u8 matrix_ysize;
233 u8 object_num;
234 };
235
236 struct mxt_object {
237 u8 type;
238 u16 start_address;
239 u8 size_minus_one;
240 u8 instances_minus_one;
241 u8 num_report_ids;
242 } __packed;
243
244 struct mxt_dbg {
245 u16 t37_address;
246 u16 diag_cmd_address;
247 struct t37_debug *t37_buf;
248 unsigned int t37_pages;
249 unsigned int t37_nodes;
250
251 struct v4l2_device v4l2;
252 struct v4l2_pix_format format;
253 struct video_device vdev;
254 struct vb2_queue queue;
255 struct mutex lock;
256 int input;
257 };
258
259 enum v4l_dbg_inputs {
260 MXT_V4L_INPUT_DELTAS,
261 MXT_V4L_INPUT_REFS,
262 MXT_V4L_INPUT_MAX,
263 };
264
265 enum mxt_suspend_mode {
266 MXT_SUSPEND_DEEP_SLEEP = 0,
267 MXT_SUSPEND_T9_CTRL = 1,
268 };
269
270 /* Config update context */
271 struct mxt_cfg {
272 u8 *raw;
273 size_t raw_size;
274 off_t raw_pos;
275
276 u8 *mem;
277 size_t mem_size;
278 int start_ofs;
279
280 struct mxt_info info;
281 };
282
283 /* Each client has this additional data */
284 struct mxt_data {
285 struct i2c_client *client;
286 struct input_dev *input_dev;
287 char phys[64]; /* device physical location */
288 struct mxt_object *object_table;
289 struct mxt_info *info;
290 void *raw_info_block;
291 unsigned int irq;
292 unsigned int max_x;
293 unsigned int max_y;
294 bool invertx;
295 bool inverty;
296 bool xy_switch;
297 u8 xsize;
298 u8 ysize;
299 bool in_bootloader;
300 u16 mem_size;
301 u8 t100_aux_ampl;
302 u8 t100_aux_area;
303 u8 t100_aux_vect;
304 u8 max_reportid;
305 u32 config_crc;
306 u32 info_crc;
307 u8 bootloader_addr;
308 u8 *msg_buf;
309 u8 t6_status;
310 bool update_input;
311 u8 last_message_count;
312 u8 num_touchids;
313 u8 multitouch;
314 struct t7_config t7_cfg;
315 struct mxt_dbg dbg;
316 struct regulator_bulk_data regulators[2];
317 struct gpio_desc *reset_gpio;
318 struct gpio_desc *wake_gpio;
319 bool use_retrigen_workaround;
320
321 /* Cached parameters from object table */
322 u16 T5_address;
323 u8 T5_msg_size;
324 u8 T6_reportid;
325 u16 T6_address;
326 u16 T7_address;
327 u16 T71_address;
328 u8 T9_reportid_min;
329 u8 T9_reportid_max;
330 u8 T15_reportid_min;
331 u8 T15_reportid_max;
332 u16 T18_address;
333 u8 T19_reportid;
334 u16 T44_address;
335 u8 T97_reportid_min;
336 u8 T97_reportid_max;
337 u8 T100_reportid_min;
338 u8 T100_reportid_max;
339
340 /* for fw update in bootloader */
341 struct completion bl_completion;
342
343 /* for reset handling */
344 struct completion reset_completion;
345
346 /* for config update handling */
347 struct completion crc_completion;
348
349 u32 *t19_keymap;
350 unsigned int t19_num_keys;
351
352 u32 *t15_keymap;
353 unsigned int t15_num_keys;
354
355 enum mxt_suspend_mode suspend_mode;
356
357 u32 wakeup_method;
358 };
359
360 struct mxt_vb2_buffer {
361 struct vb2_buffer vb;
362 struct list_head list;
363 };
364
365 static size_t mxt_obj_size(const struct mxt_object *obj)
366 {
367 return obj->size_minus_one + 1;
368 }
369
370 static size_t mxt_obj_instances(const struct mxt_object *obj)
371 {
372 return obj->instances_minus_one + 1;
373 }
374
375 static bool mxt_object_readable(unsigned int type)
376 {
377 switch (type) {
378 case MXT_GEN_COMMAND_T6:
379 case MXT_GEN_POWER_T7:
380 case MXT_GEN_ACQUIRE_T8:
381 case MXT_GEN_DATASOURCE_T53:
382 case MXT_TOUCH_MULTI_T9:
383 case MXT_TOUCH_KEYARRAY_T15:
384 case MXT_TOUCH_PROXIMITY_T23:
385 case MXT_TOUCH_PROXKEY_T52:
386 case MXT_TOUCH_PTC_KEYS_T97:
387 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
388 case MXT_PROCI_GRIPFACE_T20:
389 case MXT_PROCG_NOISE_T22:
390 case MXT_PROCI_ONETOUCH_T24:
391 case MXT_PROCI_TWOTOUCH_T27:
392 case MXT_PROCI_GRIP_T40:
393 case MXT_PROCI_PALM_T41:
394 case MXT_PROCI_TOUCHSUPPRESSION_T42:
395 case MXT_PROCI_STYLUS_T47:
396 case MXT_PROCG_NOISESUPPRESSION_T48:
397 case MXT_SPT_COMMSCONFIG_T18:
398 case MXT_SPT_GPIOPWM_T19:
399 case MXT_SPT_SELFTEST_T25:
400 case MXT_SPT_CTECONFIG_T28:
401 case MXT_SPT_USERDATA_T38:
402 case MXT_SPT_DIGITIZER_T43:
403 case MXT_SPT_CTECONFIG_T46:
404 case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71:
405 return true;
406 default:
407 return false;
408 }
409 }
410
411 static void mxt_dump_message(struct mxt_data *data, u8 *message)
412 {
413 dev_dbg(&data->client->dev, "message: %*ph\n",
414 data->T5_msg_size, message);
415 }
416
417 static int mxt_wait_for_completion(struct mxt_data *data,
418 struct completion *comp,
419 unsigned int timeout_ms)
420 {
421 struct device *dev = &data->client->dev;
422 unsigned long timeout = msecs_to_jiffies(timeout_ms);
423 long ret;
424
425 ret = wait_for_completion_interruptible_timeout(comp, timeout);
426 if (ret < 0) {
427 return ret;
428 } else if (ret == 0) {
429 dev_err(dev, "Wait for completion timed out.\n");
430 return -ETIMEDOUT;
431 }
432 return 0;
433 }
434
435 static int mxt_bootloader_read(struct mxt_data *data,
436 u8 *val, unsigned int count)
437 {
438 int ret;
439 struct i2c_msg msg;
440
441 msg.addr = data->bootloader_addr;
442 msg.flags = data->client->flags & I2C_M_TEN;
443 msg.flags |= I2C_M_RD;
444 msg.len = count;
445 msg.buf = val;
446
447 ret = i2c_transfer(data->client->adapter, &msg, 1);
448 if (ret == 1) {
449 ret = 0;
450 } else {
451 ret = ret < 0 ? ret : -EIO;
452 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
453 __func__, ret);
454 }
455
456 return ret;
457 }
458
459 static int mxt_bootloader_write(struct mxt_data *data,
460 const u8 * const val, unsigned int count)
461 {
462 int ret;
463 struct i2c_msg msg;
464
465 msg.addr = data->bootloader_addr;
466 msg.flags = data->client->flags & I2C_M_TEN;
467 msg.len = count;
468 msg.buf = (u8 *)val;
469
470 ret = i2c_transfer(data->client->adapter, &msg, 1);
471 if (ret == 1) {
472 ret = 0;
473 } else {
474 ret = ret < 0 ? ret : -EIO;
475 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
476 __func__, ret);
477 }
478
479 return ret;
480 }
481
482 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
483 {
484 u8 appmode = data->client->addr;
485 u8 bootloader;
486 u8 family_id = data->info ? data->info->family_id : 0;
487
488 switch (appmode) {
489 case 0x4a:
490 case 0x4b:
491 /* Chips after 1664S use different scheme */
492 if (retry || family_id >= 0xa2) {
493 bootloader = appmode - 0x24;
494 break;
495 }
496 fallthrough; /* for normal case */
497 case 0x4c:
498 case 0x4d:
499 case 0x5a:
500 case 0x5b:
501 bootloader = appmode - 0x26;
502 break;
503
504 default:
505 dev_err(&data->client->dev,
506 "Appmode i2c address 0x%02x not found\n",
507 appmode);
508 return -EINVAL;
509 }
510
511 data->bootloader_addr = bootloader;
512 return 0;
513 }
514
515 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
516 {
517 struct device *dev = &data->client->dev;
518 int error;
519 u8 val;
520 bool crc_failure;
521
522 error = mxt_lookup_bootloader_address(data, alt_address);
523 if (error)
524 return error;
525
526 error = mxt_bootloader_read(data, &val, 1);
527 if (error)
528 return error;
529
530 /* Check app crc fail mode */
531 crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
532
533 dev_err(dev, "Detected bootloader, status:%02X%s\n",
534 val, crc_failure ? ", APP_CRC_FAIL" : "");
535
536 return 0;
537 }
538
539 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
540 {
541 struct device *dev = &data->client->dev;
542 u8 buf[3];
543
544 if (val & MXT_BOOT_EXTENDED_ID) {
545 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
546 dev_err(dev, "%s: i2c failure\n", __func__);
547 return val;
548 }
549
550 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
551
552 return buf[0];
553 } else {
554 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
555
556 return val;
557 }
558 }
559
560 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
561 bool wait)
562 {
563 struct device *dev = &data->client->dev;
564 u8 val;
565 int ret;
566
567 recheck:
568 if (wait) {
569 /*
570 * In application update mode, the interrupt
571 * line signals state transitions. We must wait for the
572 * CHG assertion before reading the status byte.
573 * Once the status byte has been read, the line is deasserted.
574 */
575 ret = mxt_wait_for_completion(data, &data->bl_completion,
576 MXT_FW_CHG_TIMEOUT);
577 if (ret) {
578 /*
579 * TODO: handle -ERESTARTSYS better by terminating
580 * fw update process before returning to userspace
581 * by writing length 0x000 to device (iff we are in
582 * WAITING_FRAME_DATA state).
583 */
584 dev_err(dev, "Update wait error %d\n", ret);
585 return ret;
586 }
587 }
588
589 ret = mxt_bootloader_read(data, &val, 1);
590 if (ret)
591 return ret;
592
593 if (state == MXT_WAITING_BOOTLOAD_CMD)
594 val = mxt_get_bootloader_version(data, val);
595
596 switch (state) {
597 case MXT_WAITING_BOOTLOAD_CMD:
598 case MXT_WAITING_FRAME_DATA:
599 case MXT_APP_CRC_FAIL:
600 val &= ~MXT_BOOT_STATUS_MASK;
601 break;
602 case MXT_FRAME_CRC_PASS:
603 if (val == MXT_FRAME_CRC_CHECK) {
604 goto recheck;
605 } else if (val == MXT_FRAME_CRC_FAIL) {
606 dev_err(dev, "Bootloader CRC fail\n");
607 return -EINVAL;
608 }
609 break;
610 default:
611 return -EINVAL;
612 }
613
614 if (val != state) {
615 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
616 val, state);
617 return -EINVAL;
618 }
619
620 return 0;
621 }
622
623 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
624 {
625 u8 buf[2];
626
627 if (unlock) {
628 buf[0] = MXT_UNLOCK_CMD_LSB;
629 buf[1] = MXT_UNLOCK_CMD_MSB;
630 } else {
631 buf[0] = 0x01;
632 buf[1] = 0x01;
633 }
634
635 return mxt_bootloader_write(data, buf, sizeof(buf));
636 }
637
638 static bool mxt_wakeup_toggle(struct i2c_client *client,
639 bool wake_up, bool in_i2c)
640 {
641 struct mxt_data *data = i2c_get_clientdata(client);
642
643 switch (data->wakeup_method) {
644 case ATMEL_MXT_WAKEUP_I2C_SCL:
645 if (!in_i2c)
646 return false;
647 break;
648
649 case ATMEL_MXT_WAKEUP_GPIO:
650 if (in_i2c)
651 return false;
652
653 gpiod_set_value(data->wake_gpio, wake_up);
654 break;
655
656 default:
657 return false;
658 }
659
660 if (wake_up) {
661 dev_dbg(&client->dev, "waking up controller\n");
662
663 msleep(MXT_WAKEUP_TIME);
664 }
665
666 return true;
667 }
668
669 static int __mxt_read_reg(struct i2c_client *client,
670 u16 reg, u16 len, void *val)
671 {
672 struct i2c_msg xfer[2];
673 bool retried = false;
674 u8 buf[2];
675 int ret;
676
677 buf[0] = reg & 0xff;
678 buf[1] = (reg >> 8) & 0xff;
679
680 /* Write register */
681 xfer[0].addr = client->addr;
682 xfer[0].flags = 0;
683 xfer[0].len = 2;
684 xfer[0].buf = buf;
685
686 /* Read data */
687 xfer[1].addr = client->addr;
688 xfer[1].flags = I2C_M_RD;
689 xfer[1].len = len;
690 xfer[1].buf = val;
691
692 retry:
693 ret = i2c_transfer(client->adapter, xfer, 2);
694 if (ret == 2) {
695 ret = 0;
696 } else if (!retried && mxt_wakeup_toggle(client, true, true)) {
697 retried = true;
698 goto retry;
699 } else {
700 if (ret >= 0)
701 ret = -EIO;
702 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
703 __func__, ret);
704 }
705
706 return ret;
707 }
708
709 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
710 const void *val)
711 {
712 bool retried = false;
713 u8 *buf;
714 size_t count;
715 int ret;
716
717 count = len + 2;
718 buf = kmalloc(count, GFP_KERNEL);
719 if (!buf)
720 return -ENOMEM;
721
722 buf[0] = reg & 0xff;
723 buf[1] = (reg >> 8) & 0xff;
724 memcpy(&buf[2], val, len);
725
726 retry:
727 ret = i2c_master_send(client, buf, count);
728 if (ret == count) {
729 ret = 0;
730 } else if (!retried && mxt_wakeup_toggle(client, true, true)) {
731 retried = true;
732 goto retry;
733 } else {
734 if (ret >= 0)
735 ret = -EIO;
736 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
737 __func__, ret);
738 }
739
740 kfree(buf);
741 return ret;
742 }
743
744 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
745 {
746 return __mxt_write_reg(client, reg, 1, &val);
747 }
748
749 static struct mxt_object *
750 mxt_get_object(struct mxt_data *data, u8 type)
751 {
752 struct mxt_object *object;
753 int i;
754
755 for (i = 0; i < data->info->object_num; i++) {
756 object = data->object_table + i;
757 if (object->type == type)
758 return object;
759 }
760
761 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
762 return NULL;
763 }
764
765 static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
766 {
767 struct device *dev = &data->client->dev;
768 u8 status = msg[1];
769 u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
770
771 if (crc != data->config_crc) {
772 data->config_crc = crc;
773 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
774 }
775
776 complete(&data->crc_completion);
777
778 /* Detect reset */
779 if (status & MXT_T6_STATUS_RESET)
780 complete(&data->reset_completion);
781
782 /* Output debug if status has changed */
783 if (status != data->t6_status)
784 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
785 status,
786 status == 0 ? " OK" : "",
787 status & MXT_T6_STATUS_RESET ? " RESET" : "",
788 status & MXT_T6_STATUS_OFL ? " OFL" : "",
789 status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
790 status & MXT_T6_STATUS_CAL ? " CAL" : "",
791 status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
792 status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
793
794 /* Save current status */
795 data->t6_status = status;
796 }
797
798 static int mxt_write_object(struct mxt_data *data,
799 u8 type, u8 offset, u8 val)
800 {
801 struct mxt_object *object;
802 u16 reg;
803
804 object = mxt_get_object(data, type);
805 if (!object || offset >= mxt_obj_size(object))
806 return -EINVAL;
807
808 reg = object->start_address;
809 return mxt_write_reg(data->client, reg + offset, val);
810 }
811
812 static void mxt_input_button(struct mxt_data *data, u8 *message)
813 {
814 struct input_dev *input = data->input_dev;
815 int i;
816
817 for (i = 0; i < data->t19_num_keys; i++) {
818 if (data->t19_keymap[i] == KEY_RESERVED)
819 continue;
820
821 /* Active-low switch */
822 input_report_key(input, data->t19_keymap[i],
823 !(message[1] & BIT(i)));
824 }
825 }
826
827 static void mxt_input_sync(struct mxt_data *data)
828 {
829 input_mt_report_pointer_emulation(data->input_dev,
830 data->t19_num_keys);
831 input_sync(data->input_dev);
832 }
833
834 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
835 {
836 struct device *dev = &data->client->dev;
837 struct input_dev *input_dev = data->input_dev;
838 int id;
839 u8 status;
840 int x;
841 int y;
842 int area;
843 int amplitude;
844
845 id = message[0] - data->T9_reportid_min;
846 status = message[1];
847 x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
848 y = (message[3] << 4) | ((message[4] & 0xf));
849
850 /* Handle 10/12 bit switching */
851 if (data->max_x < 1024)
852 x >>= 2;
853 if (data->max_y < 1024)
854 y >>= 2;
855
856 area = message[5];
857 amplitude = message[6];
858
859 dev_dbg(dev,
860 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
861 id,
862 (status & MXT_T9_DETECT) ? 'D' : '.',
863 (status & MXT_T9_PRESS) ? 'P' : '.',
864 (status & MXT_T9_RELEASE) ? 'R' : '.',
865 (status & MXT_T9_MOVE) ? 'M' : '.',
866 (status & MXT_T9_VECTOR) ? 'V' : '.',
867 (status & MXT_T9_AMP) ? 'A' : '.',
868 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
869 (status & MXT_T9_UNGRIP) ? 'U' : '.',
870 x, y, area, amplitude);
871
872 input_mt_slot(input_dev, id);
873
874 if (status & MXT_T9_DETECT) {
875 /*
876 * Multiple bits may be set if the host is slow to read
877 * the status messages, indicating all the events that
878 * have happened.
879 */
880 if (status & MXT_T9_RELEASE) {
881 input_mt_report_slot_inactive(input_dev);
882 mxt_input_sync(data);
883 }
884
885 /* if active, pressure must be non-zero */
886 if (!amplitude)
887 amplitude = MXT_PRESSURE_DEFAULT;
888
889 /* Touch active */
890 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
891 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
892 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
893 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
894 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
895 } else {
896 /* Touch no longer active, close out slot */
897 input_mt_report_slot_inactive(input_dev);
898 }
899
900 data->update_input = true;
901 }
902
903 static void mxt_proc_t15_messages(struct mxt_data *data, u8 *message)
904 {
905 struct input_dev *input_dev = data->input_dev;
906 unsigned long keystates = get_unaligned_le32(&message[2]);
907 int key;
908
909 for (key = 0; key < data->t15_num_keys; key++)
910 input_report_key(input_dev, data->t15_keymap[key],
911 keystates & BIT(key));
912
913 data->update_input = true;
914 }
915
916 static void mxt_proc_t97_messages(struct mxt_data *data, u8 *message)
917 {
918 mxt_proc_t15_messages(data, message);
919 }
920
921 static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
922 {
923 struct device *dev = &data->client->dev;
924 struct input_dev *input_dev = data->input_dev;
925 int id;
926 u8 status;
927 u8 type = 0;
928 u16 x;
929 u16 y;
930 int distance = 0;
931 int tool = 0;
932 u8 major = 0;
933 u8 pressure = 0;
934 u8 orientation = 0;
935
936 id = message[0] - data->T100_reportid_min - 2;
937
938 /* ignore SCRSTATUS events */
939 if (id < 0)
940 return;
941
942 status = message[1];
943 x = get_unaligned_le16(&message[2]);
944 y = get_unaligned_le16(&message[4]);
945
946 if (status & MXT_T100_DETECT) {
947 type = (status & MXT_T100_TYPE_MASK) >> 4;
948
949 switch (type) {
950 case MXT_T100_TYPE_HOVERING_FINGER:
951 tool = MT_TOOL_FINGER;
952 distance = MXT_DISTANCE_HOVERING;
953
954 if (data->t100_aux_vect)
955 orientation = message[data->t100_aux_vect];
956
957 break;
958
959 case MXT_T100_TYPE_FINGER:
960 case MXT_T100_TYPE_GLOVE:
961 tool = MT_TOOL_FINGER;
962 distance = MXT_DISTANCE_ACTIVE_TOUCH;
963
964 if (data->t100_aux_area)
965 major = message[data->t100_aux_area];
966
967 if (data->t100_aux_ampl)
968 pressure = message[data->t100_aux_ampl];
969
970 if (data->t100_aux_vect)
971 orientation = message[data->t100_aux_vect];
972
973 break;
974
975 case MXT_T100_TYPE_PASSIVE_STYLUS:
976 tool = MT_TOOL_PEN;
977
978 /*
979 * Passive stylus is reported with size zero so
980 * hardcode.
981 */
982 major = MXT_TOUCH_MAJOR_DEFAULT;
983
984 if (data->t100_aux_ampl)
985 pressure = message[data->t100_aux_ampl];
986
987 break;
988
989 case MXT_T100_TYPE_LARGE_TOUCH:
990 /* Ignore suppressed touch */
991 break;
992
993 default:
994 dev_dbg(dev, "Unexpected T100 type\n");
995 return;
996 }
997 }
998
999 /*
1000 * Values reported should be non-zero if tool is touching the
1001 * device
1002 */
1003 if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
1004 pressure = MXT_PRESSURE_DEFAULT;
1005
1006 input_mt_slot(input_dev, id);
1007
1008 if (status & MXT_T100_DETECT) {
1009 dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
1010 id, type, x, y, major, pressure, orientation);
1011
1012 input_mt_report_slot_state(input_dev, tool, 1);
1013 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
1014 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
1015 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
1016 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
1017 input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
1018 input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
1019 } else {
1020 dev_dbg(dev, "[%u] release\n", id);
1021
1022 /* close out slot */
1023 input_mt_report_slot_inactive(input_dev);
1024 }
1025
1026 data->update_input = true;
1027 }
1028
1029 static int mxt_proc_message(struct mxt_data *data, u8 *message)
1030 {
1031 u8 report_id = message[0];
1032
1033 if (report_id == MXT_RPTID_NOMSG)
1034 return 0;
1035
1036 if (report_id == data->T6_reportid) {
1037 mxt_proc_t6_messages(data, message);
1038 } else if (!data->input_dev) {
1039 /*
1040 * Do not report events if input device
1041 * is not yet registered.
1042 */
1043 mxt_dump_message(data, message);
1044 } else if (report_id >= data->T9_reportid_min &&
1045 report_id <= data->T9_reportid_max) {
1046 mxt_proc_t9_message(data, message);
1047 } else if (report_id >= data->T15_reportid_min &&
1048 report_id <= data->T15_reportid_max) {
1049 mxt_proc_t15_messages(data, message);
1050 } else if (report_id >= data->T97_reportid_min &&
1051 report_id <= data->T97_reportid_max) {
1052 mxt_proc_t97_messages(data, message);
1053 } else if (report_id >= data->T100_reportid_min &&
1054 report_id <= data->T100_reportid_max) {
1055 mxt_proc_t100_message(data, message);
1056 } else if (report_id == data->T19_reportid) {
1057 mxt_input_button(data, message);
1058 data->update_input = true;
1059 } else {
1060 mxt_dump_message(data, message);
1061 }
1062
1063 return 1;
1064 }
1065
1066 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
1067 {
1068 struct device *dev = &data->client->dev;
1069 int ret;
1070 int i;
1071 u8 num_valid = 0;
1072
1073 /* Safety check for msg_buf */
1074 if (count > data->max_reportid)
1075 return -EINVAL;
1076
1077 /* Process remaining messages if necessary */
1078 ret = __mxt_read_reg(data->client, data->T5_address,
1079 data->T5_msg_size * count, data->msg_buf);
1080 if (ret) {
1081 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
1082 return ret;
1083 }
1084
1085 for (i = 0; i < count; i++) {
1086 ret = mxt_proc_message(data,
1087 data->msg_buf + data->T5_msg_size * i);
1088
1089 if (ret == 1)
1090 num_valid++;
1091 }
1092
1093 /* return number of messages read */
1094 return num_valid;
1095 }
1096
1097 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
1098 {
1099 struct device *dev = &data->client->dev;
1100 int ret;
1101 u8 count, num_left;
1102
1103 /* Read T44 and T5 together */
1104 ret = __mxt_read_reg(data->client, data->T44_address,
1105 data->T5_msg_size + 1, data->msg_buf);
1106 if (ret) {
1107 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
1108 return IRQ_NONE;
1109 }
1110
1111 count = data->msg_buf[0];
1112
1113 /*
1114 * This condition may be caused by the CHG line being configured in
1115 * Mode 0. It results in unnecessary I2C operations but it is benign.
1116 */
1117 if (count == 0)
1118 return IRQ_NONE;
1119
1120 if (count > data->max_reportid) {
1121 dev_warn(dev, "T44 count %d exceeded max report id\n", count);
1122 count = data->max_reportid;
1123 }
1124
1125 /* Process first message */
1126 ret = mxt_proc_message(data, data->msg_buf + 1);
1127 if (ret < 0) {
1128 dev_warn(dev, "Unexpected invalid message\n");
1129 return IRQ_NONE;
1130 }
1131
1132 num_left = count - 1;
1133
1134 /* Process remaining messages if necessary */
1135 if (num_left) {
1136 ret = mxt_read_and_process_messages(data, num_left);
1137 if (ret < 0)
1138 goto end;
1139 else if (ret != num_left)
1140 dev_warn(dev, "Unexpected invalid message\n");
1141 }
1142
1143 end:
1144 if (data->update_input) {
1145 mxt_input_sync(data);
1146 data->update_input = false;
1147 }
1148
1149 return IRQ_HANDLED;
1150 }
1151
1152 static int mxt_process_messages_until_invalid(struct mxt_data *data)
1153 {
1154 struct device *dev = &data->client->dev;
1155 int count, read;
1156 u8 tries = 2;
1157
1158 count = data->max_reportid;
1159
1160 /* Read messages until we force an invalid */
1161 do {
1162 read = mxt_read_and_process_messages(data, count);
1163 if (read < count)
1164 return 0;
1165 } while (--tries);
1166
1167 if (data->update_input) {
1168 mxt_input_sync(data);
1169 data->update_input = false;
1170 }
1171
1172 dev_err(dev, "CHG pin isn't cleared\n");
1173 return -EBUSY;
1174 }
1175
1176 static irqreturn_t mxt_process_messages(struct mxt_data *data)
1177 {
1178 int total_handled, num_handled;
1179 u8 count = data->last_message_count;
1180
1181 if (count < 1 || count > data->max_reportid)
1182 count = 1;
1183
1184 /* include final invalid message */
1185 total_handled = mxt_read_and_process_messages(data, count + 1);
1186 if (total_handled < 0)
1187 return IRQ_NONE;
1188 /* if there were invalid messages, then we are done */
1189 else if (total_handled <= count)
1190 goto update_count;
1191
1192 /* keep reading two msgs until one is invalid or reportid limit */
1193 do {
1194 num_handled = mxt_read_and_process_messages(data, 2);
1195 if (num_handled < 0)
1196 return IRQ_NONE;
1197
1198 total_handled += num_handled;
1199
1200 if (num_handled < 2)
1201 break;
1202 } while (total_handled < data->num_touchids);
1203
1204 update_count:
1205 data->last_message_count = total_handled;
1206
1207 if (data->update_input) {
1208 mxt_input_sync(data);
1209 data->update_input = false;
1210 }
1211
1212 return IRQ_HANDLED;
1213 }
1214
1215 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1216 {
1217 struct mxt_data *data = dev_id;
1218
1219 if (data->in_bootloader) {
1220 /* bootloader state transition completion */
1221 complete(&data->bl_completion);
1222 return IRQ_HANDLED;
1223 }
1224
1225 if (!data->object_table)
1226 return IRQ_HANDLED;
1227
1228 if (data->T44_address) {
1229 return mxt_process_messages_t44(data);
1230 } else {
1231 return mxt_process_messages(data);
1232 }
1233 }
1234
1235 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1236 u8 value, bool wait)
1237 {
1238 u16 reg;
1239 u8 command_register;
1240 int timeout_counter = 0;
1241 int ret;
1242
1243 reg = data->T6_address + cmd_offset;
1244
1245 ret = mxt_write_reg(data->client, reg, value);
1246 if (ret)
1247 return ret;
1248
1249 if (!wait)
1250 return 0;
1251
1252 do {
1253 msleep(20);
1254 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1255 if (ret)
1256 return ret;
1257 } while (command_register != 0 && timeout_counter++ <= 100);
1258
1259 if (timeout_counter > 100) {
1260 dev_err(&data->client->dev, "Command failed!\n");
1261 return -EIO;
1262 }
1263
1264 return 0;
1265 }
1266
1267 static int mxt_acquire_irq(struct mxt_data *data)
1268 {
1269 int error;
1270
1271 enable_irq(data->irq);
1272
1273 if (data->use_retrigen_workaround) {
1274 error = mxt_process_messages_until_invalid(data);
1275 if (error)
1276 return error;
1277 }
1278
1279 return 0;
1280 }
1281
1282 static int mxt_soft_reset(struct mxt_data *data)
1283 {
1284 struct device *dev = &data->client->dev;
1285 int ret = 0;
1286
1287 dev_info(dev, "Resetting device\n");
1288
1289 disable_irq(data->irq);
1290
1291 reinit_completion(&data->reset_completion);
1292
1293 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1294 if (ret)
1295 return ret;
1296
1297 /* Ignore CHG line for 100ms after reset */
1298 msleep(MXT_RESET_INVALID_CHG);
1299
1300 mxt_acquire_irq(data);
1301
1302 ret = mxt_wait_for_completion(data, &data->reset_completion,
1303 MXT_RESET_TIMEOUT);
1304 if (ret)
1305 return ret;
1306
1307 return 0;
1308 }
1309
1310 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1311 {
1312 /*
1313 * On failure, CRC is set to 0 and config will always be
1314 * downloaded.
1315 */
1316 data->config_crc = 0;
1317 reinit_completion(&data->crc_completion);
1318
1319 mxt_t6_command(data, cmd, value, true);
1320
1321 /*
1322 * Wait for crc message. On failure, CRC is set to 0 and config will
1323 * always be downloaded.
1324 */
1325 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1326 }
1327
1328 static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1329 {
1330 static const unsigned int crcpoly = 0x80001B;
1331 u32 result;
1332 u32 data_word;
1333
1334 data_word = (secondbyte << 8) | firstbyte;
1335 result = ((*crc << 1) ^ data_word);
1336
1337 if (result & 0x1000000)
1338 result ^= crcpoly;
1339
1340 *crc = result;
1341 }
1342
1343 static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1344 {
1345 u32 crc = 0;
1346 u8 *ptr = base + start_off;
1347 u8 *last_val = base + end_off - 1;
1348
1349 if (end_off < start_off)
1350 return -EINVAL;
1351
1352 while (ptr < last_val) {
1353 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1354 ptr += 2;
1355 }
1356
1357 /* if len is odd, fill the last byte with 0 */
1358 if (ptr == last_val)
1359 mxt_calc_crc24(&crc, *ptr, 0);
1360
1361 /* Mask to 24-bit */
1362 crc &= 0x00FFFFFF;
1363
1364 return crc;
1365 }
1366
1367 static int mxt_check_retrigen(struct mxt_data *data)
1368 {
1369 struct i2c_client *client = data->client;
1370 int error;
1371 int val;
1372 struct irq_data *irqd;
1373
1374 data->use_retrigen_workaround = false;
1375
1376 irqd = irq_get_irq_data(data->irq);
1377 if (!irqd)
1378 return -EINVAL;
1379
1380 if (irqd_is_level_type(irqd))
1381 return 0;
1382
1383 if (data->T18_address) {
1384 error = __mxt_read_reg(client,
1385 data->T18_address + MXT_COMMS_CTRL,
1386 1, &val);
1387 if (error)
1388 return error;
1389
1390 if (val & MXT_COMMS_RETRIGEN)
1391 return 0;
1392 }
1393
1394 dev_warn(&client->dev, "Enabling RETRIGEN workaround\n");
1395 data->use_retrigen_workaround = true;
1396 return 0;
1397 }
1398
1399 static int mxt_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg)
1400 {
1401 struct device *dev = &data->client->dev;
1402 struct mxt_object *object;
1403 unsigned int type, instance, size, byte_offset;
1404 int offset;
1405 int ret;
1406 int i;
1407 u16 reg;
1408 u8 val;
1409
1410 while (cfg->raw_pos < cfg->raw_size) {
1411 /* Read type, instance, length */
1412 ret = sscanf(cfg->raw + cfg->raw_pos, "%x %x %x%n",
1413 &type, &instance, &size, &offset);
1414 if (ret == 0) {
1415 /* EOF */
1416 break;
1417 } else if (ret != 3) {
1418 dev_err(dev, "Bad format: failed to parse object\n");
1419 return -EINVAL;
1420 }
1421 cfg->raw_pos += offset;
1422
1423 object = mxt_get_object(data, type);
1424 if (!object) {
1425 /* Skip object */
1426 for (i = 0; i < size; i++) {
1427 ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n",
1428 &val, &offset);
1429 if (ret != 1) {
1430 dev_err(dev, "Bad format in T%d at %d\n",
1431 type, i);
1432 return -EINVAL;
1433 }
1434 cfg->raw_pos += offset;
1435 }
1436 continue;
1437 }
1438
1439 if (size > mxt_obj_size(object)) {
1440 /*
1441 * Either we are in fallback mode due to wrong
1442 * config or config from a later fw version,
1443 * or the file is corrupt or hand-edited.
1444 */
1445 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1446 size - mxt_obj_size(object), type);
1447 } else if (mxt_obj_size(object) > size) {
1448 /*
1449 * If firmware is upgraded, new bytes may be added to
1450 * end of objects. It is generally forward compatible
1451 * to zero these bytes - previous behaviour will be
1452 * retained. However this does invalidate the CRC and
1453 * will force fallback mode until the configuration is
1454 * updated. We warn here but do nothing else - the
1455 * malloc has zeroed the entire configuration.
1456 */
1457 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1458 mxt_obj_size(object) - size, type);
1459 }
1460
1461 if (instance >= mxt_obj_instances(object)) {
1462 dev_err(dev, "Object instances exceeded!\n");
1463 return -EINVAL;
1464 }
1465
1466 reg = object->start_address + mxt_obj_size(object) * instance;
1467
1468 for (i = 0; i < size; i++) {
1469 ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n",
1470 &val,
1471 &offset);
1472 if (ret != 1) {
1473 dev_err(dev, "Bad format in T%d at %d\n",
1474 type, i);
1475 return -EINVAL;
1476 }
1477 cfg->raw_pos += offset;
1478
1479 if (i > mxt_obj_size(object))
1480 continue;
1481
1482 byte_offset = reg + i - cfg->start_ofs;
1483
1484 if (byte_offset >= 0 && byte_offset < cfg->mem_size) {
1485 *(cfg->mem + byte_offset) = val;
1486 } else {
1487 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1488 reg, object->type, byte_offset);
1489 return -EINVAL;
1490 }
1491 }
1492 }
1493
1494 return 0;
1495 }
1496
1497 static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg)
1498 {
1499 unsigned int byte_offset = 0;
1500 int error;
1501
1502 /* Write configuration as blocks */
1503 while (byte_offset < cfg->mem_size) {
1504 unsigned int size = cfg->mem_size - byte_offset;
1505
1506 if (size > MXT_MAX_BLOCK_WRITE)
1507 size = MXT_MAX_BLOCK_WRITE;
1508
1509 error = __mxt_write_reg(data->client,
1510 cfg->start_ofs + byte_offset,
1511 size, cfg->mem + byte_offset);
1512 if (error) {
1513 dev_err(&data->client->dev,
1514 "Config write error, ret=%d\n", error);
1515 return error;
1516 }
1517
1518 byte_offset += size;
1519 }
1520
1521 return 0;
1522 }
1523
1524 static int mxt_init_t7_power_cfg(struct mxt_data *data);
1525
1526 /*
1527 * mxt_update_cfg - download configuration to chip
1528 *
1529 * Atmel Raw Config File Format
1530 *
1531 * The first four lines of the raw config file contain:
1532 * 1) Version
1533 * 2) Chip ID Information (first 7 bytes of device memory)
1534 * 3) Chip Information Block 24-bit CRC Checksum
1535 * 4) Chip Configuration 24-bit CRC Checksum
1536 *
1537 * The rest of the file consists of one line per object instance:
1538 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1539 *
1540 * <TYPE> - 2-byte object type as hex
1541 * <INSTANCE> - 2-byte object instance number as hex
1542 * <SIZE> - 2-byte object size as hex
1543 * <CONTENTS> - array of <SIZE> 1-byte hex values
1544 */
1545 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw)
1546 {
1547 struct device *dev = &data->client->dev;
1548 struct mxt_cfg cfg;
1549 int ret;
1550 int offset;
1551 int i;
1552 u32 info_crc, config_crc, calculated_crc;
1553 u16 crc_start = 0;
1554
1555 /* Make zero terminated copy of the OBP_RAW file */
1556 cfg.raw = kmemdup_nul(fw->data, fw->size, GFP_KERNEL);
1557 if (!cfg.raw)
1558 return -ENOMEM;
1559
1560 cfg.raw_size = fw->size;
1561
1562 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1563
1564 if (strncmp(cfg.raw, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1565 dev_err(dev, "Unrecognised config file\n");
1566 ret = -EINVAL;
1567 goto release_raw;
1568 }
1569
1570 cfg.raw_pos = strlen(MXT_CFG_MAGIC);
1571
1572 /* Load information block and check */
1573 for (i = 0; i < sizeof(struct mxt_info); i++) {
1574 ret = sscanf(cfg.raw + cfg.raw_pos, "%hhx%n",
1575 (unsigned char *)&cfg.info + i,
1576 &offset);
1577 if (ret != 1) {
1578 dev_err(dev, "Bad format\n");
1579 ret = -EINVAL;
1580 goto release_raw;
1581 }
1582
1583 cfg.raw_pos += offset;
1584 }
1585
1586 if (cfg.info.family_id != data->info->family_id) {
1587 dev_err(dev, "Family ID mismatch!\n");
1588 ret = -EINVAL;
1589 goto release_raw;
1590 }
1591
1592 if (cfg.info.variant_id != data->info->variant_id) {
1593 dev_err(dev, "Variant ID mismatch!\n");
1594 ret = -EINVAL;
1595 goto release_raw;
1596 }
1597
1598 /* Read CRCs */
1599 ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &info_crc, &offset);
1600 if (ret != 1) {
1601 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1602 ret = -EINVAL;
1603 goto release_raw;
1604 }
1605 cfg.raw_pos += offset;
1606
1607 ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &config_crc, &offset);
1608 if (ret != 1) {
1609 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1610 ret = -EINVAL;
1611 goto release_raw;
1612 }
1613 cfg.raw_pos += offset;
1614
1615 /*
1616 * The Info Block CRC is calculated over mxt_info and the object
1617 * table. If it does not match then we are trying to load the
1618 * configuration from a different chip or firmware version, so
1619 * the configuration CRC is invalid anyway.
1620 */
1621 if (info_crc == data->info_crc) {
1622 if (config_crc == 0 || data->config_crc == 0) {
1623 dev_info(dev, "CRC zero, attempting to apply config\n");
1624 } else if (config_crc == data->config_crc) {
1625 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1626 data->config_crc);
1627 ret = 0;
1628 goto release_raw;
1629 } else {
1630 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1631 data->config_crc, config_crc);
1632 }
1633 } else {
1634 dev_warn(dev,
1635 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1636 data->info_crc, info_crc);
1637 }
1638
1639 /* Malloc memory to store configuration */
1640 cfg.start_ofs = MXT_OBJECT_START +
1641 data->info->object_num * sizeof(struct mxt_object) +
1642 MXT_INFO_CHECKSUM_SIZE;
1643 cfg.mem_size = data->mem_size - cfg.start_ofs;
1644 cfg.mem = kzalloc(cfg.mem_size, GFP_KERNEL);
1645 if (!cfg.mem) {
1646 ret = -ENOMEM;
1647 goto release_raw;
1648 }
1649
1650 ret = mxt_prepare_cfg_mem(data, &cfg);
1651 if (ret)
1652 goto release_mem;
1653
1654 /* Calculate crc of the received configs (not the raw config file) */
1655 if (data->T71_address)
1656 crc_start = data->T71_address;
1657 else if (data->T7_address)
1658 crc_start = data->T7_address;
1659 else
1660 dev_warn(dev, "Could not find CRC start\n");
1661
1662 if (crc_start > cfg.start_ofs) {
1663 calculated_crc = mxt_calculate_crc(cfg.mem,
1664 crc_start - cfg.start_ofs,
1665 cfg.mem_size);
1666
1667 if (config_crc > 0 && config_crc != calculated_crc)
1668 dev_warn(dev, "Config CRC in file inconsistent, calculated=%06X, file=%06X\n",
1669 calculated_crc, config_crc);
1670 }
1671
1672 ret = mxt_upload_cfg_mem(data, &cfg);
1673 if (ret)
1674 goto release_mem;
1675
1676 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1677
1678 ret = mxt_check_retrigen(data);
1679 if (ret)
1680 goto release_mem;
1681
1682 ret = mxt_soft_reset(data);
1683 if (ret)
1684 goto release_mem;
1685
1686 dev_info(dev, "Config successfully updated\n");
1687
1688 /* T7 config may have changed */
1689 mxt_init_t7_power_cfg(data);
1690
1691 release_mem:
1692 kfree(cfg.mem);
1693 release_raw:
1694 kfree(cfg.raw);
1695 return ret;
1696 }
1697
1698 static void mxt_free_input_device(struct mxt_data *data)
1699 {
1700 if (data->input_dev) {
1701 input_unregister_device(data->input_dev);
1702 data->input_dev = NULL;
1703 }
1704 }
1705
1706 static void mxt_free_object_table(struct mxt_data *data)
1707 {
1708 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
1709 video_unregister_device(&data->dbg.vdev);
1710 v4l2_device_unregister(&data->dbg.v4l2);
1711 #endif
1712 data->object_table = NULL;
1713 data->info = NULL;
1714 kfree(data->raw_info_block);
1715 data->raw_info_block = NULL;
1716 kfree(data->msg_buf);
1717 data->msg_buf = NULL;
1718 data->T5_address = 0;
1719 data->T5_msg_size = 0;
1720 data->T6_reportid = 0;
1721 data->T7_address = 0;
1722 data->T71_address = 0;
1723 data->T9_reportid_min = 0;
1724 data->T9_reportid_max = 0;
1725 data->T15_reportid_min = 0;
1726 data->T15_reportid_max = 0;
1727 data->T18_address = 0;
1728 data->T19_reportid = 0;
1729 data->T44_address = 0;
1730 data->T97_reportid_min = 0;
1731 data->T97_reportid_max = 0;
1732 data->T100_reportid_min = 0;
1733 data->T100_reportid_max = 0;
1734 data->max_reportid = 0;
1735 }
1736
1737 static int mxt_parse_object_table(struct mxt_data *data,
1738 struct mxt_object *object_table)
1739 {
1740 struct i2c_client *client = data->client;
1741 int i;
1742 u8 reportid;
1743 u16 end_address;
1744
1745 /* Valid Report IDs start counting from 1 */
1746 reportid = 1;
1747 data->mem_size = 0;
1748 for (i = 0; i < data->info->object_num; i++) {
1749 struct mxt_object *object = object_table + i;
1750 u8 min_id, max_id;
1751
1752 le16_to_cpus(&object->start_address);
1753
1754 if (object->num_report_ids) {
1755 min_id = reportid;
1756 reportid += object->num_report_ids *
1757 mxt_obj_instances(object);
1758 max_id = reportid - 1;
1759 } else {
1760 min_id = 0;
1761 max_id = 0;
1762 }
1763
1764 dev_dbg(&data->client->dev,
1765 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1766 object->type, object->start_address,
1767 mxt_obj_size(object), mxt_obj_instances(object),
1768 min_id, max_id);
1769
1770 switch (object->type) {
1771 case MXT_GEN_MESSAGE_T5:
1772 if (data->info->family_id == 0x80 &&
1773 data->info->version < 0x20) {
1774 /*
1775 * On mXT224 firmware versions prior to V2.0
1776 * read and discard unused CRC byte otherwise
1777 * DMA reads are misaligned.
1778 */
1779 data->T5_msg_size = mxt_obj_size(object);
1780 } else {
1781 /* CRC not enabled, so skip last byte */
1782 data->T5_msg_size = mxt_obj_size(object) - 1;
1783 }
1784 data->T5_address = object->start_address;
1785 break;
1786 case MXT_GEN_COMMAND_T6:
1787 data->T6_reportid = min_id;
1788 data->T6_address = object->start_address;
1789 break;
1790 case MXT_GEN_POWER_T7:
1791 data->T7_address = object->start_address;
1792 break;
1793 case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71:
1794 data->T71_address = object->start_address;
1795 break;
1796 case MXT_TOUCH_MULTI_T9:
1797 data->multitouch = MXT_TOUCH_MULTI_T9;
1798 /* Only handle messages from first T9 instance */
1799 data->T9_reportid_min = min_id;
1800 data->T9_reportid_max = min_id +
1801 object->num_report_ids - 1;
1802 data->num_touchids = object->num_report_ids;
1803 break;
1804 case MXT_TOUCH_KEYARRAY_T15:
1805 data->T15_reportid_min = min_id;
1806 data->T15_reportid_max = max_id;
1807 break;
1808 case MXT_SPT_COMMSCONFIG_T18:
1809 data->T18_address = object->start_address;
1810 break;
1811 case MXT_SPT_MESSAGECOUNT_T44:
1812 data->T44_address = object->start_address;
1813 break;
1814 case MXT_SPT_GPIOPWM_T19:
1815 data->T19_reportid = min_id;
1816 break;
1817 case MXT_TOUCH_PTC_KEYS_T97:
1818 data->T97_reportid_min = min_id;
1819 data->T97_reportid_max = max_id;
1820 break;
1821 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1822 data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1823 data->T100_reportid_min = min_id;
1824 data->T100_reportid_max = max_id;
1825 /* first two report IDs reserved */
1826 data->num_touchids = object->num_report_ids - 2;
1827 break;
1828 }
1829
1830 end_address = object->start_address
1831 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1832
1833 if (end_address >= data->mem_size)
1834 data->mem_size = end_address + 1;
1835 }
1836
1837 /* Store maximum reportid */
1838 data->max_reportid = reportid;
1839
1840 /* If T44 exists, T5 position has to be directly after */
1841 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1842 dev_err(&client->dev, "Invalid T44 position\n");
1843 return -EINVAL;
1844 }
1845
1846 data->msg_buf = kcalloc(data->max_reportid,
1847 data->T5_msg_size, GFP_KERNEL);
1848 if (!data->msg_buf)
1849 return -ENOMEM;
1850
1851 return 0;
1852 }
1853
1854 static int mxt_read_info_block(struct mxt_data *data)
1855 {
1856 struct i2c_client *client = data->client;
1857 int error;
1858 size_t size;
1859 void *id_buf, *buf;
1860 uint8_t num_objects;
1861 u32 calculated_crc;
1862 u8 *crc_ptr;
1863
1864 /* If info block already allocated, free it */
1865 if (data->raw_info_block)
1866 mxt_free_object_table(data);
1867
1868 /* Read 7-byte ID information block starting at address 0 */
1869 size = sizeof(struct mxt_info);
1870 id_buf = kzalloc(size, GFP_KERNEL);
1871 if (!id_buf)
1872 return -ENOMEM;
1873
1874 error = __mxt_read_reg(client, 0, size, id_buf);
1875 if (error)
1876 goto err_free_mem;
1877
1878 /* Resize buffer to give space for rest of info block */
1879 num_objects = ((struct mxt_info *)id_buf)->object_num;
1880 size += (num_objects * sizeof(struct mxt_object))
1881 + MXT_INFO_CHECKSUM_SIZE;
1882
1883 buf = krealloc(id_buf, size, GFP_KERNEL);
1884 if (!buf) {
1885 error = -ENOMEM;
1886 goto err_free_mem;
1887 }
1888 id_buf = buf;
1889
1890 /* Read rest of info block */
1891 error = __mxt_read_reg(client, MXT_OBJECT_START,
1892 size - MXT_OBJECT_START,
1893 id_buf + MXT_OBJECT_START);
1894 if (error)
1895 goto err_free_mem;
1896
1897 /* Extract & calculate checksum */
1898 crc_ptr = id_buf + size - MXT_INFO_CHECKSUM_SIZE;
1899 data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16);
1900
1901 calculated_crc = mxt_calculate_crc(id_buf, 0,
1902 size - MXT_INFO_CHECKSUM_SIZE);
1903
1904 /*
1905 * CRC mismatch can be caused by data corruption due to I2C comms
1906 * issue or else device is not using Object Based Protocol (eg i2c-hid)
1907 */
1908 if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) {
1909 dev_err(&client->dev,
1910 "Info Block CRC error calculated=0x%06X read=0x%06X\n",
1911 calculated_crc, data->info_crc);
1912 error = -EIO;
1913 goto err_free_mem;
1914 }
1915
1916 data->raw_info_block = id_buf;
1917 data->info = (struct mxt_info *)id_buf;
1918
1919 dev_info(&client->dev,
1920 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
1921 data->info->family_id, data->info->variant_id,
1922 data->info->version >> 4, data->info->version & 0xf,
1923 data->info->build, data->info->object_num);
1924
1925 /* Parse object table information */
1926 error = mxt_parse_object_table(data, id_buf + MXT_OBJECT_START);
1927 if (error) {
1928 dev_err(&client->dev, "Error %d parsing object table\n", error);
1929 mxt_free_object_table(data);
1930 return error;
1931 }
1932
1933 data->object_table = (struct mxt_object *)(id_buf + MXT_OBJECT_START);
1934
1935 return 0;
1936
1937 err_free_mem:
1938 kfree(id_buf);
1939 return error;
1940 }
1941
1942 static int mxt_read_t9_resolution(struct mxt_data *data)
1943 {
1944 struct i2c_client *client = data->client;
1945 int error;
1946 struct t9_range range;
1947 unsigned char orient;
1948 struct mxt_object *object;
1949
1950 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1951 if (!object)
1952 return -EINVAL;
1953
1954 error = __mxt_read_reg(client,
1955 object->start_address + MXT_T9_XSIZE,
1956 sizeof(data->xsize), &data->xsize);
1957 if (error)
1958 return error;
1959
1960 error = __mxt_read_reg(client,
1961 object->start_address + MXT_T9_YSIZE,
1962 sizeof(data->ysize), &data->ysize);
1963 if (error)
1964 return error;
1965
1966 error = __mxt_read_reg(client,
1967 object->start_address + MXT_T9_RANGE,
1968 sizeof(range), &range);
1969 if (error)
1970 return error;
1971
1972 data->max_x = get_unaligned_le16(&range.x);
1973 data->max_y = get_unaligned_le16(&range.y);
1974
1975 error = __mxt_read_reg(client,
1976 object->start_address + MXT_T9_ORIENT,
1977 1, &orient);
1978 if (error)
1979 return error;
1980
1981 data->xy_switch = orient & MXT_T9_ORIENT_SWITCH;
1982 data->invertx = orient & MXT_T9_ORIENT_INVERTX;
1983 data->inverty = orient & MXT_T9_ORIENT_INVERTY;
1984
1985 return 0;
1986 }
1987
1988 static int mxt_read_t100_config(struct mxt_data *data)
1989 {
1990 struct i2c_client *client = data->client;
1991 int error;
1992 struct mxt_object *object;
1993 u16 range_x, range_y;
1994 u8 cfg, tchaux;
1995 u8 aux;
1996
1997 object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1998 if (!object)
1999 return -EINVAL;
2000
2001 /* read touchscreen dimensions */
2002 error = __mxt_read_reg(client,
2003 object->start_address + MXT_T100_XRANGE,
2004 sizeof(range_x), &range_x);
2005 if (error)
2006 return error;
2007
2008 data->max_x = get_unaligned_le16(&range_x);
2009
2010 error = __mxt_read_reg(client,
2011 object->start_address + MXT_T100_YRANGE,
2012 sizeof(range_y), &range_y);
2013 if (error)
2014 return error;
2015
2016 data->max_y = get_unaligned_le16(&range_y);
2017
2018 error = __mxt_read_reg(client,
2019 object->start_address + MXT_T100_XSIZE,
2020 sizeof(data->xsize), &data->xsize);
2021 if (error)
2022 return error;
2023
2024 error = __mxt_read_reg(client,
2025 object->start_address + MXT_T100_YSIZE,
2026 sizeof(data->ysize), &data->ysize);
2027 if (error)
2028 return error;
2029
2030 /* read orientation config */
2031 error = __mxt_read_reg(client,
2032 object->start_address + MXT_T100_CFG1,
2033 1, &cfg);
2034 if (error)
2035 return error;
2036
2037 data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY;
2038 data->invertx = cfg & MXT_T100_CFG_INVERTX;
2039 data->inverty = cfg & MXT_T100_CFG_INVERTY;
2040
2041 /* allocate aux bytes */
2042 error = __mxt_read_reg(client,
2043 object->start_address + MXT_T100_TCHAUX,
2044 1, &tchaux);
2045 if (error)
2046 return error;
2047
2048 aux = 6;
2049
2050 if (tchaux & MXT_T100_TCHAUX_VECT)
2051 data->t100_aux_vect = aux++;
2052
2053 if (tchaux & MXT_T100_TCHAUX_AMPL)
2054 data->t100_aux_ampl = aux++;
2055
2056 if (tchaux & MXT_T100_TCHAUX_AREA)
2057 data->t100_aux_area = aux++;
2058
2059 dev_dbg(&client->dev,
2060 "T100 aux mappings vect:%u ampl:%u area:%u\n",
2061 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
2062
2063 return 0;
2064 }
2065
2066 static int mxt_input_open(struct input_dev *dev);
2067 static void mxt_input_close(struct input_dev *dev);
2068
2069 static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
2070 struct mxt_data *data)
2071 {
2072 int i;
2073
2074 input_dev->name = "Atmel maXTouch Touchpad";
2075
2076 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
2077
2078 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
2079 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
2080 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
2081 MXT_PIXELS_PER_MM);
2082 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
2083 MXT_PIXELS_PER_MM);
2084
2085 for (i = 0; i < data->t19_num_keys; i++)
2086 if (data->t19_keymap[i] != KEY_RESERVED)
2087 input_set_capability(input_dev, EV_KEY,
2088 data->t19_keymap[i]);
2089 }
2090
2091 static int mxt_initialize_input_device(struct mxt_data *data)
2092 {
2093 struct device *dev = &data->client->dev;
2094 struct input_dev *input_dev;
2095 int error;
2096 unsigned int num_mt_slots;
2097 unsigned int mt_flags = 0;
2098 int i;
2099
2100 switch (data->multitouch) {
2101 case MXT_TOUCH_MULTI_T9:
2102 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
2103 error = mxt_read_t9_resolution(data);
2104 if (error)
2105 dev_warn(dev, "Failed to initialize T9 resolution\n");
2106 break;
2107
2108 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
2109 num_mt_slots = data->num_touchids;
2110 error = mxt_read_t100_config(data);
2111 if (error)
2112 dev_warn(dev, "Failed to read T100 config\n");
2113 break;
2114
2115 default:
2116 dev_err(dev, "Invalid multitouch object\n");
2117 return -EINVAL;
2118 }
2119
2120 /* Handle default values and orientation switch */
2121 if (data->max_x == 0)
2122 data->max_x = 1023;
2123
2124 if (data->max_y == 0)
2125 data->max_y = 1023;
2126
2127 if (data->xy_switch)
2128 swap(data->max_x, data->max_y);
2129
2130 dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
2131
2132 /* Register input device */
2133 input_dev = input_allocate_device();
2134 if (!input_dev)
2135 return -ENOMEM;
2136
2137 input_dev->name = "Atmel maXTouch Touchscreen";
2138 input_dev->phys = data->phys;
2139 input_dev->id.bustype = BUS_I2C;
2140 input_dev->dev.parent = dev;
2141 input_dev->open = mxt_input_open;
2142 input_dev->close = mxt_input_close;
2143
2144 input_dev->keycode = data->t15_keymap;
2145 input_dev->keycodemax = data->t15_num_keys;
2146 input_dev->keycodesize = sizeof(data->t15_keymap[0]);
2147
2148 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
2149
2150 /* For single touch */
2151 input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
2152 input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
2153
2154 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2155 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2156 data->t100_aux_ampl)) {
2157 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
2158 }
2159
2160 /* If device has buttons we assume it is a touchpad */
2161 if (data->t19_num_keys) {
2162 mxt_set_up_as_touchpad(input_dev, data);
2163 mt_flags |= INPUT_MT_POINTER;
2164 } else {
2165 mt_flags |= INPUT_MT_DIRECT;
2166 }
2167
2168 /* For multi touch */
2169 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
2170 if (error) {
2171 dev_err(dev, "Error %d initialising slots\n", error);
2172 goto err_free_mem;
2173 }
2174
2175 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
2176 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
2177 0, MT_TOOL_MAX, 0, 0);
2178 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
2179 MXT_DISTANCE_ACTIVE_TOUCH,
2180 MXT_DISTANCE_HOVERING,
2181 0, 0);
2182 }
2183
2184 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
2185 0, data->max_x, 0, 0);
2186 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
2187 0, data->max_y, 0, 0);
2188
2189 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2190 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2191 data->t100_aux_area)) {
2192 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
2193 0, MXT_MAX_AREA, 0, 0);
2194 }
2195
2196 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2197 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2198 data->t100_aux_ampl)) {
2199 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
2200 0, 255, 0, 0);
2201 }
2202
2203 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2204 data->t100_aux_vect) {
2205 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
2206 0, 255, 0, 0);
2207 }
2208
2209 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2210 data->t100_aux_vect) {
2211 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
2212 0, 255, 0, 0);
2213 }
2214
2215 /* For T15 and T97 Key Array */
2216 if (data->T15_reportid_min || data->T97_reportid_min) {
2217 for (i = 0; i < data->t15_num_keys; i++)
2218 input_set_capability(input_dev,
2219 EV_KEY, data->t15_keymap[i]);
2220 }
2221
2222 input_set_drvdata(input_dev, data);
2223
2224 error = input_register_device(input_dev);
2225 if (error) {
2226 dev_err(dev, "Error %d registering input device\n", error);
2227 goto err_free_mem;
2228 }
2229
2230 data->input_dev = input_dev;
2231
2232 return 0;
2233
2234 err_free_mem:
2235 input_free_device(input_dev);
2236 return error;
2237 }
2238
2239 static int mxt_configure_objects(struct mxt_data *data,
2240 const struct firmware *cfg);
2241
2242 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
2243 {
2244 mxt_configure_objects(ctx, cfg);
2245 release_firmware(cfg);
2246 }
2247
2248 static int mxt_initialize(struct mxt_data *data)
2249 {
2250 struct i2c_client *client = data->client;
2251 int recovery_attempts = 0;
2252 int error;
2253
2254 while (1) {
2255 error = mxt_read_info_block(data);
2256 if (!error)
2257 break;
2258
2259 /* Check bootloader state */
2260 error = mxt_probe_bootloader(data, false);
2261 if (error) {
2262 dev_info(&client->dev, "Trying alternate bootloader address\n");
2263 error = mxt_probe_bootloader(data, true);
2264 if (error) {
2265 /* Chip is not in appmode or bootloader mode */
2266 return error;
2267 }
2268 }
2269
2270 /* OK, we are in bootloader, see if we can recover */
2271 if (++recovery_attempts > 1) {
2272 dev_err(&client->dev, "Could not recover from bootloader mode\n");
2273 /*
2274 * We can reflash from this state, so do not
2275 * abort initialization.
2276 */
2277 data->in_bootloader = true;
2278 return 0;
2279 }
2280
2281 /* Attempt to exit bootloader into app mode */
2282 mxt_send_bootloader_cmd(data, false);
2283 msleep(MXT_FW_RESET_TIME);
2284 }
2285
2286 error = mxt_check_retrigen(data);
2287 if (error)
2288 return error;
2289
2290 error = mxt_acquire_irq(data);
2291 if (error)
2292 return error;
2293
2294 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
2295 &client->dev, GFP_KERNEL, data,
2296 mxt_config_cb);
2297 if (error) {
2298 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
2299 error);
2300 return error;
2301 }
2302
2303 return 0;
2304 }
2305
2306 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2307 {
2308 struct device *dev = &data->client->dev;
2309 int error;
2310 struct t7_config *new_config;
2311 struct t7_config deepsleep = { .active = 0, .idle = 0 };
2312
2313 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2314 new_config = &deepsleep;
2315 else
2316 new_config = &data->t7_cfg;
2317
2318 error = __mxt_write_reg(data->client, data->T7_address,
2319 sizeof(data->t7_cfg), new_config);
2320 if (error)
2321 return error;
2322
2323 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2324 new_config->active, new_config->idle);
2325
2326 return 0;
2327 }
2328
2329 static int mxt_init_t7_power_cfg(struct mxt_data *data)
2330 {
2331 struct device *dev = &data->client->dev;
2332 int error;
2333 bool retry = false;
2334
2335 recheck:
2336 error = __mxt_read_reg(data->client, data->T7_address,
2337 sizeof(data->t7_cfg), &data->t7_cfg);
2338 if (error)
2339 return error;
2340
2341 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2342 if (!retry) {
2343 dev_dbg(dev, "T7 cfg zero, resetting\n");
2344 mxt_soft_reset(data);
2345 retry = true;
2346 goto recheck;
2347 } else {
2348 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2349 data->t7_cfg.active = 20;
2350 data->t7_cfg.idle = 100;
2351 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2352 }
2353 }
2354
2355 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2356 data->t7_cfg.active, data->t7_cfg.idle);
2357 return 0;
2358 }
2359
2360 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
2361 static const struct v4l2_file_operations mxt_video_fops = {
2362 .owner = THIS_MODULE,
2363 .open = v4l2_fh_open,
2364 .release = vb2_fop_release,
2365 .unlocked_ioctl = video_ioctl2,
2366 .read = vb2_fop_read,
2367 .mmap = vb2_fop_mmap,
2368 .poll = vb2_fop_poll,
2369 };
2370
2371 static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
2372 unsigned int y)
2373 {
2374 struct mxt_info *info = data->info;
2375 struct mxt_dbg *dbg = &data->dbg;
2376 unsigned int ofs, page;
2377 unsigned int col = 0;
2378 unsigned int col_width;
2379
2380 if (info->family_id == MXT_FAMILY_1386) {
2381 col_width = info->matrix_ysize / MXT1386_COLUMNS;
2382 col = y / col_width;
2383 y = y % col_width;
2384 } else {
2385 col_width = info->matrix_ysize;
2386 }
2387
2388 ofs = (y + (x * col_width)) * sizeof(u16);
2389 page = ofs / MXT_DIAGNOSTIC_SIZE;
2390 ofs %= MXT_DIAGNOSTIC_SIZE;
2391
2392 if (info->family_id == MXT_FAMILY_1386)
2393 page += col * MXT1386_PAGES_PER_COLUMN;
2394
2395 return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
2396 }
2397
2398 static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf)
2399 {
2400 struct mxt_dbg *dbg = &data->dbg;
2401 unsigned int x = 0;
2402 unsigned int y = 0;
2403 unsigned int i, rx, ry;
2404
2405 for (i = 0; i < dbg->t37_nodes; i++) {
2406 /* Handle orientation */
2407 rx = data->xy_switch ? y : x;
2408 ry = data->xy_switch ? x : y;
2409 rx = data->invertx ? (data->xsize - 1 - rx) : rx;
2410 ry = data->inverty ? (data->ysize - 1 - ry) : ry;
2411
2412 outbuf[i] = mxt_get_debug_value(data, rx, ry);
2413
2414 /* Next value */
2415 if (++x >= (data->xy_switch ? data->ysize : data->xsize)) {
2416 x = 0;
2417 y++;
2418 }
2419 }
2420
2421 return 0;
2422 }
2423
2424 static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode,
2425 u16 *outbuf)
2426 {
2427 struct mxt_dbg *dbg = &data->dbg;
2428 int retries = 0;
2429 int page;
2430 int ret;
2431 u8 cmd = mode;
2432 struct t37_debug *p;
2433 u8 cmd_poll;
2434
2435 for (page = 0; page < dbg->t37_pages; page++) {
2436 p = dbg->t37_buf + page;
2437
2438 ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
2439 cmd);
2440 if (ret)
2441 return ret;
2442
2443 retries = 0;
2444 msleep(20);
2445 wait_cmd:
2446 /* Read back command byte */
2447 ret = __mxt_read_reg(data->client, dbg->diag_cmd_address,
2448 sizeof(cmd_poll), &cmd_poll);
2449 if (ret)
2450 return ret;
2451
2452 /* Field is cleared once the command has been processed */
2453 if (cmd_poll) {
2454 if (retries++ > 100)
2455 return -EINVAL;
2456
2457 msleep(20);
2458 goto wait_cmd;
2459 }
2460
2461 /* Read T37 page */
2462 ret = __mxt_read_reg(data->client, dbg->t37_address,
2463 sizeof(struct t37_debug), p);
2464 if (ret)
2465 return ret;
2466
2467 if (p->mode != mode || p->page != page) {
2468 dev_err(&data->client->dev, "T37 page mismatch\n");
2469 return -EINVAL;
2470 }
2471
2472 dev_dbg(&data->client->dev, "%s page:%d retries:%d\n",
2473 __func__, page, retries);
2474
2475 /* For remaining pages, write PAGEUP rather than mode */
2476 cmd = MXT_DIAGNOSTIC_PAGEUP;
2477 }
2478
2479 return mxt_convert_debug_pages(data, outbuf);
2480 }
2481
2482 static int mxt_queue_setup(struct vb2_queue *q,
2483 unsigned int *nbuffers, unsigned int *nplanes,
2484 unsigned int sizes[], struct device *alloc_devs[])
2485 {
2486 struct mxt_data *data = q->drv_priv;
2487 size_t size = data->dbg.t37_nodes * sizeof(u16);
2488
2489 if (*nplanes)
2490 return sizes[0] < size ? -EINVAL : 0;
2491
2492 *nplanes = 1;
2493 sizes[0] = size;
2494
2495 return 0;
2496 }
2497
2498 static void mxt_buffer_queue(struct vb2_buffer *vb)
2499 {
2500 struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue);
2501 u16 *ptr;
2502 int ret;
2503 u8 mode;
2504
2505 ptr = vb2_plane_vaddr(vb, 0);
2506 if (!ptr) {
2507 dev_err(&data->client->dev, "Error acquiring frame ptr\n");
2508 goto fault;
2509 }
2510
2511 switch (data->dbg.input) {
2512 case MXT_V4L_INPUT_DELTAS:
2513 default:
2514 mode = MXT_DIAGNOSTIC_DELTAS;
2515 break;
2516
2517 case MXT_V4L_INPUT_REFS:
2518 mode = MXT_DIAGNOSTIC_REFS;
2519 break;
2520 }
2521
2522 ret = mxt_read_diagnostic_debug(data, mode, ptr);
2523 if (ret)
2524 goto fault;
2525
2526 vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16));
2527 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
2528 return;
2529
2530 fault:
2531 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
2532 }
2533
2534 /* V4L2 structures */
2535 static const struct vb2_ops mxt_queue_ops = {
2536 .queue_setup = mxt_queue_setup,
2537 .buf_queue = mxt_buffer_queue,
2538 .wait_prepare = vb2_ops_wait_prepare,
2539 .wait_finish = vb2_ops_wait_finish,
2540 };
2541
2542 static const struct vb2_queue mxt_queue = {
2543 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2544 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
2545 .buf_struct_size = sizeof(struct mxt_vb2_buffer),
2546 .ops = &mxt_queue_ops,
2547 .mem_ops = &vb2_vmalloc_memops,
2548 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
2549 .min_queued_buffers = 1,
2550 };
2551
2552 static int mxt_vidioc_querycap(struct file *file, void *priv,
2553 struct v4l2_capability *cap)
2554 {
2555 struct mxt_data *data = video_drvdata(file);
2556
2557 strscpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver));
2558 strscpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card));
2559 snprintf(cap->bus_info, sizeof(cap->bus_info),
2560 "I2C:%s", dev_name(&data->client->dev));
2561 return 0;
2562 }
2563
2564 static int mxt_vidioc_enum_input(struct file *file, void *priv,
2565 struct v4l2_input *i)
2566 {
2567 if (i->index >= MXT_V4L_INPUT_MAX)
2568 return -EINVAL;
2569
2570 i->type = V4L2_INPUT_TYPE_TOUCH;
2571
2572 switch (i->index) {
2573 case MXT_V4L_INPUT_REFS:
2574 strscpy(i->name, "Mutual Capacitance References",
2575 sizeof(i->name));
2576 break;
2577 case MXT_V4L_INPUT_DELTAS:
2578 strscpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name));
2579 break;
2580 }
2581
2582 return 0;
2583 }
2584
2585 static int mxt_set_input(struct mxt_data *data, unsigned int i)
2586 {
2587 struct v4l2_pix_format *f = &data->dbg.format;
2588
2589 if (i >= MXT_V4L_INPUT_MAX)
2590 return -EINVAL;
2591
2592 if (i == MXT_V4L_INPUT_DELTAS)
2593 f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2594 else
2595 f->pixelformat = V4L2_TCH_FMT_TU16;
2596
2597 f->width = data->xy_switch ? data->ysize : data->xsize;
2598 f->height = data->xy_switch ? data->xsize : data->ysize;
2599 f->field = V4L2_FIELD_NONE;
2600 f->colorspace = V4L2_COLORSPACE_RAW;
2601 f->bytesperline = f->width * sizeof(u16);
2602 f->sizeimage = f->width * f->height * sizeof(u16);
2603
2604 data->dbg.input = i;
2605
2606 return 0;
2607 }
2608
2609 static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i)
2610 {
2611 return mxt_set_input(video_drvdata(file), i);
2612 }
2613
2614 static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
2615 {
2616 struct mxt_data *data = video_drvdata(file);
2617
2618 *i = data->dbg.input;
2619
2620 return 0;
2621 }
2622
2623 static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f)
2624 {
2625 struct mxt_data *data = video_drvdata(file);
2626
2627 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2628 f->fmt.pix = data->dbg.format;
2629
2630 return 0;
2631 }
2632
2633 static int mxt_vidioc_enum_fmt(struct file *file, void *priv,
2634 struct v4l2_fmtdesc *fmt)
2635 {
2636 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2637 return -EINVAL;
2638
2639 switch (fmt->index) {
2640 case 0:
2641 fmt->pixelformat = V4L2_TCH_FMT_TU16;
2642 break;
2643
2644 case 1:
2645 fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2646 break;
2647
2648 default:
2649 return -EINVAL;
2650 }
2651
2652 return 0;
2653 }
2654
2655 static int mxt_vidioc_g_parm(struct file *file, void *fh,
2656 struct v4l2_streamparm *a)
2657 {
2658 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2659 return -EINVAL;
2660
2661 a->parm.capture.readbuffers = 1;
2662 a->parm.capture.timeperframe.numerator = 1;
2663 a->parm.capture.timeperframe.denominator = 10;
2664 return 0;
2665 }
2666
2667 static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = {
2668 .vidioc_querycap = mxt_vidioc_querycap,
2669
2670 .vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt,
2671 .vidioc_s_fmt_vid_cap = mxt_vidioc_fmt,
2672 .vidioc_g_fmt_vid_cap = mxt_vidioc_fmt,
2673 .vidioc_try_fmt_vid_cap = mxt_vidioc_fmt,
2674 .vidioc_g_parm = mxt_vidioc_g_parm,
2675
2676 .vidioc_enum_input = mxt_vidioc_enum_input,
2677 .vidioc_g_input = mxt_vidioc_g_input,
2678 .vidioc_s_input = mxt_vidioc_s_input,
2679
2680 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2681 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2682 .vidioc_querybuf = vb2_ioctl_querybuf,
2683 .vidioc_qbuf = vb2_ioctl_qbuf,
2684 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2685 .vidioc_expbuf = vb2_ioctl_expbuf,
2686
2687 .vidioc_streamon = vb2_ioctl_streamon,
2688 .vidioc_streamoff = vb2_ioctl_streamoff,
2689 };
2690
2691 static const struct video_device mxt_video_device = {
2692 .name = "Atmel maxTouch",
2693 .fops = &mxt_video_fops,
2694 .ioctl_ops = &mxt_video_ioctl_ops,
2695 .release = video_device_release_empty,
2696 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
2697 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
2698 };
2699
2700 static void mxt_debug_init(struct mxt_data *data)
2701 {
2702 struct mxt_info *info = data->info;
2703 struct mxt_dbg *dbg = &data->dbg;
2704 struct mxt_object *object;
2705 int error;
2706
2707 object = mxt_get_object(data, MXT_GEN_COMMAND_T6);
2708 if (!object)
2709 goto error;
2710
2711 dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC;
2712
2713 object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37);
2714 if (!object)
2715 goto error;
2716
2717 if (mxt_obj_size(object) != sizeof(struct t37_debug)) {
2718 dev_warn(&data->client->dev, "Bad T37 size");
2719 goto error;
2720 }
2721
2722 dbg->t37_address = object->start_address;
2723
2724 /* Calculate size of data and allocate buffer */
2725 dbg->t37_nodes = data->xsize * data->ysize;
2726
2727 if (info->family_id == MXT_FAMILY_1386)
2728 dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN;
2729 else
2730 dbg->t37_pages = DIV_ROUND_UP(data->xsize *
2731 info->matrix_ysize *
2732 sizeof(u16),
2733 sizeof(dbg->t37_buf->data));
2734
2735 dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
2736 sizeof(struct t37_debug), GFP_KERNEL);
2737 if (!dbg->t37_buf)
2738 goto error;
2739
2740 /* init channel to zero */
2741 mxt_set_input(data, 0);
2742
2743 /* register video device */
2744 snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s", "atmel_mxt_ts");
2745 error = v4l2_device_register(&data->client->dev, &dbg->v4l2);
2746 if (error)
2747 goto error;
2748
2749 /* initialize the queue */
2750 mutex_init(&dbg->lock);
2751 dbg->queue = mxt_queue;
2752 dbg->queue.drv_priv = data;
2753 dbg->queue.lock = &dbg->lock;
2754 dbg->queue.dev = &data->client->dev;
2755
2756 error = vb2_queue_init(&dbg->queue);
2757 if (error)
2758 goto error_unreg_v4l2;
2759
2760 dbg->vdev = mxt_video_device;
2761 dbg->vdev.v4l2_dev = &dbg->v4l2;
2762 dbg->vdev.lock = &dbg->lock;
2763 dbg->vdev.vfl_dir = VFL_DIR_RX;
2764 dbg->vdev.queue = &dbg->queue;
2765 video_set_drvdata(&dbg->vdev, data);
2766
2767 error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1);
2768 if (error)
2769 goto error_unreg_v4l2;
2770
2771 return;
2772
2773 error_unreg_v4l2:
2774 v4l2_device_unregister(&dbg->v4l2);
2775 error:
2776 dev_warn(&data->client->dev, "Error initializing T37\n");
2777 }
2778 #else
2779 static void mxt_debug_init(struct mxt_data *data)
2780 {
2781 }
2782 #endif
2783
2784 static int mxt_configure_objects(struct mxt_data *data,
2785 const struct firmware *cfg)
2786 {
2787 struct device *dev = &data->client->dev;
2788 int error;
2789
2790 error = mxt_init_t7_power_cfg(data);
2791 if (error) {
2792 dev_err(dev, "Failed to initialize power cfg\n");
2793 return error;
2794 }
2795
2796 if (cfg) {
2797 error = mxt_update_cfg(data, cfg);
2798 if (error)
2799 dev_warn(dev, "Error %d updating config\n", error);
2800 }
2801
2802 if (data->multitouch) {
2803 error = mxt_initialize_input_device(data);
2804 if (error)
2805 return error;
2806 } else {
2807 dev_warn(dev, "No touch object detected\n");
2808 }
2809
2810 mxt_debug_init(data);
2811
2812 return 0;
2813 }
2814
2815 /* Firmware Version is returned as Major.Minor.Build */
2816 static ssize_t mxt_fw_version_show(struct device *dev,
2817 struct device_attribute *attr, char *buf)
2818 {
2819 struct mxt_data *data = dev_get_drvdata(dev);
2820 struct mxt_info *info = data->info;
2821 return sysfs_emit(buf, "%u.%u.%02X\n",
2822 info->version >> 4, info->version & 0xf, info->build);
2823 }
2824
2825 /* Hardware Version is returned as FamilyID.VariantID */
2826 static ssize_t mxt_hw_version_show(struct device *dev,
2827 struct device_attribute *attr, char *buf)
2828 {
2829 struct mxt_data *data = dev_get_drvdata(dev);
2830 struct mxt_info *info = data->info;
2831 return sysfs_emit(buf, "%u.%u\n", info->family_id, info->variant_id);
2832 }
2833
2834 static ssize_t mxt_show_instance(char *buf, int count,
2835 struct mxt_object *object, int instance,
2836 const u8 *val)
2837 {
2838 int i;
2839
2840 if (mxt_obj_instances(object) > 1)
2841 count += sysfs_emit_at(buf, count, "Instance %u\n", instance);
2842
2843 for (i = 0; i < mxt_obj_size(object); i++)
2844 count += sysfs_emit_at(buf, count, "\t[%2u]: %02x (%d)\n",
2845 i, val[i], val[i]);
2846 count += sysfs_emit_at(buf, count, "\n");
2847
2848 return count;
2849 }
2850
2851 static ssize_t mxt_object_show(struct device *dev,
2852 struct device_attribute *attr, char *buf)
2853 {
2854 struct mxt_data *data = dev_get_drvdata(dev);
2855 struct mxt_object *object;
2856 int count = 0;
2857 int i, j;
2858 int error;
2859 u8 *obuf;
2860
2861 /* Pre-allocate buffer large enough to hold max sized object. */
2862 obuf = kmalloc(256, GFP_KERNEL);
2863 if (!obuf)
2864 return -ENOMEM;
2865
2866 error = 0;
2867 for (i = 0; i < data->info->object_num; i++) {
2868 object = data->object_table + i;
2869
2870 if (!mxt_object_readable(object->type))
2871 continue;
2872
2873 count += sysfs_emit_at(buf, count, "T%u:\n", object->type);
2874
2875 for (j = 0; j < mxt_obj_instances(object); j++) {
2876 u16 size = mxt_obj_size(object);
2877 u16 addr = object->start_address + j * size;
2878
2879 error = __mxt_read_reg(data->client, addr, size, obuf);
2880 if (error)
2881 goto done;
2882
2883 count = mxt_show_instance(buf, count, object, j, obuf);
2884 }
2885 }
2886
2887 done:
2888 kfree(obuf);
2889 return error ?: count;
2890 }
2891
2892 static int mxt_check_firmware_format(struct device *dev,
2893 const struct firmware *fw)
2894 {
2895 unsigned int pos = 0;
2896 char c;
2897
2898 while (pos < fw->size) {
2899 c = *(fw->data + pos);
2900
2901 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2902 return 0;
2903
2904 pos++;
2905 }
2906
2907 /*
2908 * To convert file try:
2909 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2910 */
2911 dev_err(dev, "Aborting: firmware file must be in binary format\n");
2912
2913 return -EINVAL;
2914 }
2915
2916 static int mxt_load_fw(struct device *dev, const char *fn)
2917 {
2918 struct mxt_data *data = dev_get_drvdata(dev);
2919 const struct firmware *fw = NULL;
2920 unsigned int frame_size;
2921 unsigned int pos = 0;
2922 unsigned int retry = 0;
2923 unsigned int frame = 0;
2924 int ret;
2925
2926 ret = request_firmware(&fw, fn, dev);
2927 if (ret) {
2928 dev_err(dev, "Unable to open firmware %s\n", fn);
2929 return ret;
2930 }
2931
2932 /* Check for incorrect enc file */
2933 ret = mxt_check_firmware_format(dev, fw);
2934 if (ret)
2935 goto release_firmware;
2936
2937 if (!data->in_bootloader) {
2938 /* Change to the bootloader mode */
2939 data->in_bootloader = true;
2940
2941 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2942 MXT_BOOT_VALUE, false);
2943 if (ret)
2944 goto release_firmware;
2945
2946 msleep(MXT_RESET_TIME);
2947
2948 /* Do not need to scan since we know family ID */
2949 ret = mxt_lookup_bootloader_address(data, 0);
2950 if (ret)
2951 goto release_firmware;
2952
2953 mxt_free_input_device(data);
2954 mxt_free_object_table(data);
2955 } else {
2956 enable_irq(data->irq);
2957 }
2958
2959 reinit_completion(&data->bl_completion);
2960
2961 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2962 if (ret) {
2963 /* Bootloader may still be unlocked from previous attempt */
2964 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2965 if (ret)
2966 goto disable_irq;
2967 } else {
2968 dev_info(dev, "Unlocking bootloader\n");
2969
2970 /* Unlock bootloader */
2971 ret = mxt_send_bootloader_cmd(data, true);
2972 if (ret)
2973 goto disable_irq;
2974 }
2975
2976 while (pos < fw->size) {
2977 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
2978 if (ret)
2979 goto disable_irq;
2980
2981 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2982
2983 /* Take account of CRC bytes */
2984 frame_size += 2;
2985
2986 /* Write one frame to device */
2987 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2988 if (ret)
2989 goto disable_irq;
2990
2991 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
2992 if (ret) {
2993 retry++;
2994
2995 /* Back off by 20ms per retry */
2996 msleep(retry * 20);
2997
2998 if (retry > 20) {
2999 dev_err(dev, "Retry count exceeded\n");
3000 goto disable_irq;
3001 }
3002 } else {
3003 retry = 0;
3004 pos += frame_size;
3005 frame++;
3006 }
3007
3008 if (frame % 50 == 0)
3009 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
3010 frame, pos, fw->size);
3011 }
3012
3013 /* Wait for flash. */
3014 ret = mxt_wait_for_completion(data, &data->bl_completion,
3015 MXT_FW_RESET_TIME);
3016 if (ret)
3017 goto disable_irq;
3018
3019 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
3020
3021 /*
3022 * Wait for device to reset. Some bootloader versions do not assert
3023 * the CHG line after bootloading has finished, so ignore potential
3024 * errors.
3025 */
3026 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
3027
3028 data->in_bootloader = false;
3029
3030 disable_irq:
3031 disable_irq(data->irq);
3032 release_firmware:
3033 release_firmware(fw);
3034 return ret;
3035 }
3036
3037 static ssize_t mxt_update_fw_store(struct device *dev,
3038 struct device_attribute *attr,
3039 const char *buf, size_t count)
3040 {
3041 struct mxt_data *data = dev_get_drvdata(dev);
3042 int error;
3043
3044 error = mxt_load_fw(dev, MXT_FW_NAME);
3045 if (error) {
3046 dev_err(dev, "The firmware update failed(%d)\n", error);
3047 count = error;
3048 } else {
3049 dev_info(dev, "The firmware update succeeded\n");
3050
3051 error = mxt_initialize(data);
3052 if (error)
3053 return error;
3054 }
3055
3056 return count;
3057 }
3058
3059 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
3060 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
3061 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
3062 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
3063
3064 static struct attribute *mxt_attrs[] = {
3065 &dev_attr_fw_version.attr,
3066 &dev_attr_hw_version.attr,
3067 &dev_attr_object.attr,
3068 &dev_attr_update_fw.attr,
3069 NULL
3070 };
3071
3072 ATTRIBUTE_GROUPS(mxt);
3073
3074 static void mxt_start(struct mxt_data *data)
3075 {
3076 mxt_wakeup_toggle(data->client, true, false);
3077
3078 switch (data->suspend_mode) {
3079 case MXT_SUSPEND_T9_CTRL:
3080 mxt_soft_reset(data);
3081
3082 /* Touch enable */
3083 /* 0x83 = SCANEN | RPTEN | ENABLE */
3084 mxt_write_object(data,
3085 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
3086 break;
3087
3088 case MXT_SUSPEND_DEEP_SLEEP:
3089 default:
3090 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
3091
3092 /* Recalibrate since chip has been in deep sleep */
3093 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
3094 break;
3095 }
3096 }
3097
3098 static void mxt_stop(struct mxt_data *data)
3099 {
3100 switch (data->suspend_mode) {
3101 case MXT_SUSPEND_T9_CTRL:
3102 /* Touch disable */
3103 mxt_write_object(data,
3104 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
3105 break;
3106
3107 case MXT_SUSPEND_DEEP_SLEEP:
3108 default:
3109 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
3110 break;
3111 }
3112
3113 mxt_wakeup_toggle(data->client, false, false);
3114 }
3115
3116 static int mxt_input_open(struct input_dev *dev)
3117 {
3118 struct mxt_data *data = input_get_drvdata(dev);
3119
3120 mxt_start(data);
3121
3122 return 0;
3123 }
3124
3125 static void mxt_input_close(struct input_dev *dev)
3126 {
3127 struct mxt_data *data = input_get_drvdata(dev);
3128
3129 mxt_stop(data);
3130 }
3131
3132 static int mxt_parse_device_properties(struct mxt_data *data)
3133 {
3134 static const char keymap_property[] = "linux,gpio-keymap";
3135 static const char buttons_property[] = "linux,keycodes";
3136 struct device *dev = &data->client->dev;
3137 u32 *keymap;
3138 u32 *buttonmap;
3139 int n_keys;
3140 int error;
3141
3142 if (device_property_present(dev, keymap_property)) {
3143 n_keys = device_property_count_u32(dev, keymap_property);
3144 if (n_keys <= 0) {
3145 error = n_keys < 0 ? n_keys : -EINVAL;
3146 dev_err(dev, "invalid/malformed '%s' property: %d\n",
3147 keymap_property, error);
3148 return error;
3149 }
3150
3151 keymap = devm_kmalloc_array(dev, n_keys, sizeof(*keymap),
3152 GFP_KERNEL);
3153 if (!keymap)
3154 return -ENOMEM;
3155
3156 error = device_property_read_u32_array(dev, keymap_property,
3157 keymap, n_keys);
3158 if (error) {
3159 dev_err(dev, "failed to parse '%s' property: %d\n",
3160 keymap_property, error);
3161 return error;
3162 }
3163
3164 data->t19_keymap = keymap;
3165 data->t19_num_keys = n_keys;
3166 }
3167
3168 if (device_property_present(dev, buttons_property)) {
3169 n_keys = device_property_count_u32(dev, buttons_property);
3170 if (n_keys <= 0) {
3171 error = n_keys < 0 ? n_keys : -EINVAL;
3172 dev_err(dev, "invalid/malformed '%s' property: %d\n",
3173 buttons_property, error);
3174 return error;
3175 }
3176
3177 buttonmap = devm_kmalloc_array(dev, n_keys, sizeof(*buttonmap),
3178 GFP_KERNEL);
3179 if (!buttonmap)
3180 return -ENOMEM;
3181
3182 error = device_property_read_u32_array(dev, buttons_property,
3183 buttonmap, n_keys);
3184 if (error) {
3185 dev_err(dev, "failed to parse '%s' property: %d\n",
3186 buttons_property, error);
3187 return error;
3188 }
3189
3190 data->t15_keymap = buttonmap;
3191 data->t15_num_keys = n_keys;
3192 }
3193
3194 return 0;
3195 }
3196
3197 static const struct dmi_system_id chromebook_T9_suspend_dmi[] = {
3198 {
3199 .matches = {
3200 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
3201 DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
3202 },
3203 },
3204 {
3205 .matches = {
3206 DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
3207 },
3208 },
3209 { }
3210 };
3211
3212 static int mxt_probe(struct i2c_client *client)
3213 {
3214 struct mxt_data *data;
3215 int error;
3216
3217 /*
3218 * Ignore devices that do not have device properties attached to
3219 * them, as we need help determining whether we are dealing with
3220 * touch screen or touchpad.
3221 *
3222 * So far on x86 the only users of Atmel touch controllers are
3223 * Chromebooks, and chromeos_laptop driver will ensure that
3224 * necessary properties are provided (if firmware does not do that).
3225 */
3226 if (!device_property_present(&client->dev, "compatible"))
3227 return -ENXIO;
3228
3229 /*
3230 * Ignore ACPI devices representing bootloader mode.
3231 *
3232 * This is a bit of a hack: Google Chromebook BIOS creates ACPI
3233 * devices for both application and bootloader modes, but we are
3234 * interested in application mode only (if device is in bootloader
3235 * mode we'll end up switching into application anyway). So far
3236 * application mode addresses were all above 0x40, so we'll use it
3237 * as a threshold.
3238 */
3239 if (ACPI_COMPANION(&client->dev) && client->addr < 0x40)
3240 return -ENXIO;
3241
3242 data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL);
3243 if (!data)
3244 return -ENOMEM;
3245
3246 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
3247 client->adapter->nr, client->addr);
3248
3249 data->client = client;
3250 data->irq = client->irq;
3251 i2c_set_clientdata(client, data);
3252
3253 init_completion(&data->bl_completion);
3254 init_completion(&data->reset_completion);
3255 init_completion(&data->crc_completion);
3256
3257 data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ?
3258 MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP;
3259
3260 error = mxt_parse_device_properties(data);
3261 if (error)
3262 return error;
3263
3264 /*
3265 * VDDA is the analog voltage supply 2.57..3.47 V
3266 * VDD is the digital voltage supply 1.71..3.47 V
3267 */
3268 data->regulators[0].supply = "vdda";
3269 data->regulators[1].supply = "vdd";
3270 error = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(data->regulators),
3271 data->regulators);
3272 if (error) {
3273 if (error != -EPROBE_DEFER)
3274 dev_err(&client->dev, "Failed to get regulators %d\n",
3275 error);
3276 return error;
3277 }
3278
3279 /* Request the RESET line as asserted so we go into reset */
3280 data->reset_gpio = devm_gpiod_get_optional(&client->dev,
3281 "reset", GPIOD_OUT_HIGH);
3282 if (IS_ERR(data->reset_gpio)) {
3283 error = PTR_ERR(data->reset_gpio);
3284 dev_err(&client->dev, "Failed to get reset gpio: %d\n", error);
3285 return error;
3286 }
3287
3288 /* Request the WAKE line as asserted so we go out of sleep */
3289 data->wake_gpio = devm_gpiod_get_optional(&client->dev,
3290 "wake", GPIOD_OUT_HIGH);
3291 if (IS_ERR(data->wake_gpio)) {
3292 error = PTR_ERR(data->wake_gpio);
3293 dev_err(&client->dev, "Failed to get wake gpio: %d\n", error);
3294 return error;
3295 }
3296
3297 error = devm_request_threaded_irq(&client->dev, client->irq,
3298 NULL, mxt_interrupt,
3299 IRQF_ONESHOT | IRQF_NO_AUTOEN,
3300 client->name, data);
3301 if (error) {
3302 dev_err(&client->dev, "Failed to register interrupt\n");
3303 return error;
3304 }
3305
3306 error = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
3307 data->regulators);
3308 if (error) {
3309 dev_err(&client->dev, "failed to enable regulators: %d\n",
3310 error);
3311 return error;
3312 }
3313 /*
3314 * The device takes 40ms to come up after power-on according
3315 * to the mXT224 datasheet, page 13.
3316 */
3317 msleep(MXT_BACKUP_TIME);
3318
3319 if (data->reset_gpio) {
3320 /* Wait a while and then de-assert the RESET GPIO line */
3321 msleep(MXT_RESET_GPIO_TIME);
3322 gpiod_set_value(data->reset_gpio, 0);
3323 msleep(MXT_RESET_INVALID_CHG);
3324 }
3325
3326 /*
3327 * Controllers like mXT1386 have a dedicated WAKE line that could be
3328 * connected to a GPIO or to I2C SCL pin, or permanently asserted low.
3329 *
3330 * This WAKE line is used for waking controller from a deep-sleep and
3331 * it needs to be asserted low for 25 milliseconds before I2C transfers
3332 * could be accepted by controller if it was in a deep-sleep mode.
3333 * Controller will go into sleep automatically after 2 seconds of
3334 * inactivity if WAKE line is deasserted and deep sleep is activated.
3335 *
3336 * If WAKE line is connected to I2C SCL pin, then the first I2C transfer
3337 * will get an instant NAK and transfer needs to be retried after 25ms.
3338 *
3339 * If WAKE line is connected to a GPIO line, the line must be asserted
3340 * 25ms before the host attempts to communicate with the controller.
3341 */
3342 device_property_read_u32(&client->dev, "atmel,wakeup-method",
3343 &data->wakeup_method);
3344
3345 error = mxt_initialize(data);
3346 if (error)
3347 goto err_disable_regulators;
3348
3349 return 0;
3350
3351 err_disable_regulators:
3352 regulator_bulk_disable(ARRAY_SIZE(data->regulators),
3353 data->regulators);
3354 return error;
3355 }
3356
3357 static void mxt_remove(struct i2c_client *client)
3358 {
3359 struct mxt_data *data = i2c_get_clientdata(client);
3360
3361 disable_irq(data->irq);
3362 mxt_free_input_device(data);
3363 mxt_free_object_table(data);
3364 regulator_bulk_disable(ARRAY_SIZE(data->regulators),
3365 data->regulators);
3366 }
3367
3368 static int mxt_suspend(struct device *dev)
3369 {
3370 struct i2c_client *client = to_i2c_client(dev);
3371 struct mxt_data *data = i2c_get_clientdata(client);
3372 struct input_dev *input_dev = data->input_dev;
3373
3374 if (!input_dev)
3375 return 0;
3376
3377 mutex_lock(&input_dev->mutex);
3378
3379 if (input_device_enabled(input_dev))
3380 mxt_stop(data);
3381
3382 mutex_unlock(&input_dev->mutex);
3383
3384 disable_irq(data->irq);
3385
3386 return 0;
3387 }
3388
3389 static int mxt_resume(struct device *dev)
3390 {
3391 struct i2c_client *client = to_i2c_client(dev);
3392 struct mxt_data *data = i2c_get_clientdata(client);
3393 struct input_dev *input_dev = data->input_dev;
3394
3395 if (!input_dev)
3396 return 0;
3397
3398 enable_irq(data->irq);
3399
3400 mutex_lock(&input_dev->mutex);
3401
3402 if (input_device_enabled(input_dev))
3403 mxt_start(data);
3404
3405 mutex_unlock(&input_dev->mutex);
3406
3407 return 0;
3408 }
3409
3410 static DEFINE_SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
3411
3412 static const struct of_device_id mxt_of_match[] = {
3413 { .compatible = "atmel,maxtouch", },
3414 /* Compatibles listed below are deprecated */
3415 { .compatible = "atmel,qt602240_ts", },
3416 { .compatible = "atmel,atmel_mxt_ts", },
3417 { .compatible = "atmel,atmel_mxt_tp", },
3418 { .compatible = "atmel,mXT224", },
3419 {},
3420 };
3421 MODULE_DEVICE_TABLE(of, mxt_of_match);
3422
3423 #ifdef CONFIG_ACPI
3424 static const struct acpi_device_id mxt_acpi_id[] = {
3425 { "ATML0000", 0 }, /* Touchpad */
3426 { "ATML0001", 0 }, /* Touchscreen */
3427 { }
3428 };
3429 MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
3430 #endif
3431
3432 static const struct i2c_device_id mxt_id[] = {
3433 { "qt602240_ts" },
3434 { "atmel_mxt_ts" },
3435 { "atmel_mxt_tp" },
3436 { "maxtouch" },
3437 { "mXT224" },
3438 { }
3439 };
3440 MODULE_DEVICE_TABLE(i2c, mxt_id);
3441
3442 static struct i2c_driver mxt_driver = {
3443 .driver = {
3444 .name = "atmel_mxt_ts",
3445 .dev_groups = mxt_groups,
3446 .of_match_table = mxt_of_match,
3447 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
3448 .pm = pm_sleep_ptr(&mxt_pm_ops),
3449 },
3450 .probe = mxt_probe,
3451 .remove = mxt_remove,
3452 .id_table = mxt_id,
3453 };
3454
3455 module_i2c_driver(mxt_driver);
3456
3457 /* Module information */
3458 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
3459 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
3460 MODULE_LICENSE("GPL");
Kernel DRM miscellaneous fixes and cross-tree changes