2 * Atmel maXTouch Touchscreen driver
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Copyright (C) 2011-2014 Atmel Corporation
6 * Copyright (C) 2012 Google, Inc.
8 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/completion.h>
20 #include <linux/delay.h>
21 #include <linux/firmware.h>
22 #include <linux/i2c.h>
23 #include <linux/i2c/atmel_mxt_ts.h>
24 #include <linux/input/mt.h>
25 #include <linux/interrupt.h>
27 #include <linux/slab.h>
35 #define MXT_FW_NAME "maxtouch.fw"
36 #define MXT_CFG_NAME "maxtouch.cfg"
37 #define MXT_CFG_MAGIC "OBP_RAW V1"
41 #define MXT_FAMILY_ID 0x00
42 #define MXT_VARIANT_ID 0x01
43 #define MXT_VERSION 0x02
44 #define MXT_BUILD 0x03
45 #define MXT_MATRIX_X_SIZE 0x04
46 #define MXT_MATRIX_Y_SIZE 0x05
47 #define MXT_OBJECT_NUM 0x06
48 #define MXT_OBJECT_START 0x07
50 #define MXT_OBJECT_SIZE 6
51 #define MXT_INFO_CHECKSUM_SIZE 3
52 #define MXT_MAX_BLOCK_WRITE 256
55 #define MXT_DEBUG_DIAGNOSTIC_T37 37
56 #define MXT_GEN_MESSAGE_T5 5
57 #define MXT_GEN_COMMAND_T6 6
58 #define MXT_GEN_POWER_T7 7
59 #define MXT_GEN_ACQUIRE_T8 8
60 #define MXT_GEN_DATASOURCE_T53 53
61 #define MXT_TOUCH_MULTI_T9 9
62 #define MXT_TOUCH_KEYARRAY_T15 15
63 #define MXT_TOUCH_PROXIMITY_T23 23
64 #define MXT_TOUCH_PROXKEY_T52 52
65 #define MXT_PROCI_GRIPFACE_T20 20
66 #define MXT_PROCG_NOISE_T22 22
67 #define MXT_PROCI_ONETOUCH_T24 24
68 #define MXT_PROCI_TWOTOUCH_T27 27
69 #define MXT_PROCI_GRIP_T40 40
70 #define MXT_PROCI_PALM_T41 41
71 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
72 #define MXT_PROCI_STYLUS_T47 47
73 #define MXT_PROCG_NOISESUPPRESSION_T48 48
74 #define MXT_SPT_COMMSCONFIG_T18 18
75 #define MXT_SPT_GPIOPWM_T19 19
76 #define MXT_SPT_SELFTEST_T25 25
77 #define MXT_SPT_CTECONFIG_T28 28
78 #define MXT_SPT_USERDATA_T38 38
79 #define MXT_SPT_DIGITIZER_T43 43
80 #define MXT_SPT_MESSAGECOUNT_T44 44
81 #define MXT_SPT_CTECONFIG_T46 46
83 /* MXT_GEN_MESSAGE_T5 object */
84 #define MXT_RPTID_NOMSG 0xff
86 /* MXT_GEN_COMMAND_T6 field */
87 #define MXT_COMMAND_RESET 0
88 #define MXT_COMMAND_BACKUPNV 1
89 #define MXT_COMMAND_CALIBRATE 2
90 #define MXT_COMMAND_REPORTALL 3
91 #define MXT_COMMAND_DIAGNOSTIC 5
93 /* Define for T6 status byte */
94 #define MXT_T6_STATUS_RESET (1 << 7)
95 #define MXT_T6_STATUS_OFL (1 << 6)
96 #define MXT_T6_STATUS_SIGERR (1 << 5)
97 #define MXT_T6_STATUS_CAL (1 << 4)
98 #define MXT_T6_STATUS_CFGERR (1 << 3)
99 #define MXT_T6_STATUS_COMSERR (1 << 2)
101 /* MXT_GEN_POWER_T7 field */
107 #define MXT_POWER_CFG_RUN 0
108 #define MXT_POWER_CFG_DEEPSLEEP 1
110 /* MXT_GEN_ACQUIRE_T8 field */
111 #define MXT_ACQUIRE_CHRGTIME 0
112 #define MXT_ACQUIRE_TCHDRIFT 2
113 #define MXT_ACQUIRE_DRIFTST 3
114 #define MXT_ACQUIRE_TCHAUTOCAL 4
115 #define MXT_ACQUIRE_SYNC 5
116 #define MXT_ACQUIRE_ATCHCALST 6
117 #define MXT_ACQUIRE_ATCHCALSTHR 7
119 /* MXT_TOUCH_MULTI_T9 field */
120 #define MXT_T9_ORIENT 9
121 #define MXT_T9_RANGE 18
123 /* MXT_TOUCH_MULTI_T9 status */
124 #define MXT_T9_UNGRIP (1 << 0)
125 #define MXT_T9_SUPPRESS (1 << 1)
126 #define MXT_T9_AMP (1 << 2)
127 #define MXT_T9_VECTOR (1 << 3)
128 #define MXT_T9_MOVE (1 << 4)
129 #define MXT_T9_RELEASE (1 << 5)
130 #define MXT_T9_PRESS (1 << 6)
131 #define MXT_T9_DETECT (1 << 7)
138 /* MXT_TOUCH_MULTI_T9 orient */
139 #define MXT_T9_ORIENT_SWITCH (1 << 0)
141 /* MXT_PROCI_GRIPFACE_T20 field */
142 #define MXT_GRIPFACE_CTRL 0
143 #define MXT_GRIPFACE_XLOGRIP 1
144 #define MXT_GRIPFACE_XHIGRIP 2
145 #define MXT_GRIPFACE_YLOGRIP 3
146 #define MXT_GRIPFACE_YHIGRIP 4
147 #define MXT_GRIPFACE_MAXTCHS 5
148 #define MXT_GRIPFACE_SZTHR1 7
149 #define MXT_GRIPFACE_SZTHR2 8
150 #define MXT_GRIPFACE_SHPTHR1 9
151 #define MXT_GRIPFACE_SHPTHR2 10
152 #define MXT_GRIPFACE_SUPEXTTO 11
154 /* MXT_PROCI_NOISE field */
155 #define MXT_NOISE_CTRL 0
156 #define MXT_NOISE_OUTFLEN 1
157 #define MXT_NOISE_GCAFUL_LSB 3
158 #define MXT_NOISE_GCAFUL_MSB 4
159 #define MXT_NOISE_GCAFLL_LSB 5
160 #define MXT_NOISE_GCAFLL_MSB 6
161 #define MXT_NOISE_ACTVGCAFVALID 7
162 #define MXT_NOISE_NOISETHR 8
163 #define MXT_NOISE_FREQHOPSCALE 10
164 #define MXT_NOISE_FREQ0 11
165 #define MXT_NOISE_FREQ1 12
166 #define MXT_NOISE_FREQ2 13
167 #define MXT_NOISE_FREQ3 14
168 #define MXT_NOISE_FREQ4 15
169 #define MXT_NOISE_IDLEGCAFVALID 16
171 /* MXT_SPT_COMMSCONFIG_T18 */
172 #define MXT_COMMS_CTRL 0
173 #define MXT_COMMS_CMD 1
175 /* MXT_SPT_CTECONFIG_T28 field */
176 #define MXT_CTE_CTRL 0
177 #define MXT_CTE_CMD 1
178 #define MXT_CTE_MODE 2
179 #define MXT_CTE_IDLEGCAFDEPTH 3
180 #define MXT_CTE_ACTVGCAFDEPTH 4
181 #define MXT_CTE_VOLTAGE 5
183 #define MXT_VOLTAGE_DEFAULT 2700000
184 #define MXT_VOLTAGE_STEP 10000
186 /* Define for MXT_GEN_COMMAND_T6 */
187 #define MXT_BOOT_VALUE 0xa5
188 #define MXT_RESET_VALUE 0x01
189 #define MXT_BACKUP_VALUE 0x55
192 #define MXT_BACKUP_TIME 50 /* msec */
193 #define MXT_RESET_TIME 200 /* msec */
194 #define MXT_RESET_TIMEOUT 3000 /* msec */
195 #define MXT_CRC_TIMEOUT 1000 /* msec */
196 #define MXT_FW_RESET_TIME 3000 /* msec */
197 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
199 /* Command to unlock bootloader */
200 #define MXT_UNLOCK_CMD_MSB 0xaa
201 #define MXT_UNLOCK_CMD_LSB 0xdc
203 /* Bootloader mode status */
204 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
205 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
206 #define MXT_FRAME_CRC_CHECK 0x02
207 #define MXT_FRAME_CRC_FAIL 0x03
208 #define MXT_FRAME_CRC_PASS 0x04
209 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
210 #define MXT_BOOT_STATUS_MASK 0x3f
211 #define MXT_BOOT_EXTENDED_ID (1 << 5)
212 #define MXT_BOOT_ID_MASK 0x1f
214 /* Touchscreen absolute values */
215 #define MXT_MAX_AREA 0xff
217 #define MXT_PIXELS_PER_MM 20
233 u8 instances_minus_one
;
237 /* Each client has this additional data */
239 struct i2c_client
*client
;
240 struct input_dev
*input_dev
;
241 char phys
[64]; /* device physical location */
242 const struct mxt_platform_data
*pdata
;
243 struct mxt_object
*object_table
;
244 struct mxt_info info
;
257 u8 last_message_count
;
259 struct t7_config t7_cfg
;
261 /* Cached parameters from object table */
272 /* for fw update in bootloader */
273 struct completion bl_completion
;
275 /* for reset handling */
276 struct completion reset_completion
;
278 /* for config update handling */
279 struct completion crc_completion
;
282 static size_t mxt_obj_size(const struct mxt_object
*obj
)
284 return obj
->size_minus_one
+ 1;
287 static size_t mxt_obj_instances(const struct mxt_object
*obj
)
289 return obj
->instances_minus_one
+ 1;
292 static bool mxt_object_readable(unsigned int type
)
295 case MXT_GEN_COMMAND_T6
:
296 case MXT_GEN_POWER_T7
:
297 case MXT_GEN_ACQUIRE_T8
:
298 case MXT_GEN_DATASOURCE_T53
:
299 case MXT_TOUCH_MULTI_T9
:
300 case MXT_TOUCH_KEYARRAY_T15
:
301 case MXT_TOUCH_PROXIMITY_T23
:
302 case MXT_TOUCH_PROXKEY_T52
:
303 case MXT_PROCI_GRIPFACE_T20
:
304 case MXT_PROCG_NOISE_T22
:
305 case MXT_PROCI_ONETOUCH_T24
:
306 case MXT_PROCI_TWOTOUCH_T27
:
307 case MXT_PROCI_GRIP_T40
:
308 case MXT_PROCI_PALM_T41
:
309 case MXT_PROCI_TOUCHSUPPRESSION_T42
:
310 case MXT_PROCI_STYLUS_T47
:
311 case MXT_PROCG_NOISESUPPRESSION_T48
:
312 case MXT_SPT_COMMSCONFIG_T18
:
313 case MXT_SPT_GPIOPWM_T19
:
314 case MXT_SPT_SELFTEST_T25
:
315 case MXT_SPT_CTECONFIG_T28
:
316 case MXT_SPT_USERDATA_T38
:
317 case MXT_SPT_DIGITIZER_T43
:
318 case MXT_SPT_CTECONFIG_T46
:
325 static void mxt_dump_message(struct mxt_data
*data
, u8
*message
)
327 dev_dbg(&data
->client
->dev
, "message: %*ph\n",
328 data
->T5_msg_size
, message
);
331 static int mxt_wait_for_completion(struct mxt_data
*data
,
332 struct completion
*comp
,
333 unsigned int timeout_ms
)
335 struct device
*dev
= &data
->client
->dev
;
336 unsigned long timeout
= msecs_to_jiffies(timeout_ms
);
339 ret
= wait_for_completion_interruptible_timeout(comp
, timeout
);
342 } else if (ret
== 0) {
343 dev_err(dev
, "Wait for completion timed out.\n");
349 static int mxt_bootloader_read(struct mxt_data
*data
,
350 u8
*val
, unsigned int count
)
355 msg
.addr
= data
->bootloader_addr
;
356 msg
.flags
= data
->client
->flags
& I2C_M_TEN
;
357 msg
.flags
|= I2C_M_RD
;
361 ret
= i2c_transfer(data
->client
->adapter
, &msg
, 1);
365 ret
= ret
< 0 ? ret
: -EIO
;
366 dev_err(&data
->client
->dev
, "%s: i2c recv failed (%d)\n",
373 static int mxt_bootloader_write(struct mxt_data
*data
,
374 const u8
* const val
, unsigned int count
)
379 msg
.addr
= data
->bootloader_addr
;
380 msg
.flags
= data
->client
->flags
& I2C_M_TEN
;
384 ret
= i2c_transfer(data
->client
->adapter
, &msg
, 1);
388 ret
= ret
< 0 ? ret
: -EIO
;
389 dev_err(&data
->client
->dev
, "%s: i2c send failed (%d)\n",
396 static int mxt_lookup_bootloader_address(struct mxt_data
*data
, bool retry
)
398 u8 appmode
= data
->client
->addr
;
404 /* Chips after 1664S use different scheme */
405 if (retry
|| data
->info
.family_id
>= 0xa2) {
406 bootloader
= appmode
- 0x24;
409 /* Fall through for normal case */
414 bootloader
= appmode
- 0x26;
418 dev_err(&data
->client
->dev
,
419 "Appmode i2c address 0x%02x not found\n",
424 data
->bootloader_addr
= bootloader
;
428 static int mxt_probe_bootloader(struct mxt_data
*data
, bool alt_address
)
430 struct device
*dev
= &data
->client
->dev
;
435 error
= mxt_lookup_bootloader_address(data
, alt_address
);
439 error
= mxt_bootloader_read(data
, &val
, 1);
443 /* Check app crc fail mode */
444 crc_failure
= (val
& ~MXT_BOOT_STATUS_MASK
) == MXT_APP_CRC_FAIL
;
446 dev_err(dev
, "Detected bootloader, status:%02X%s\n",
447 val
, crc_failure
? ", APP_CRC_FAIL" : "");
452 static u8
mxt_get_bootloader_version(struct mxt_data
*data
, u8 val
)
454 struct device
*dev
= &data
->client
->dev
;
457 if (val
& MXT_BOOT_EXTENDED_ID
) {
458 if (mxt_bootloader_read(data
, &buf
[0], 3) != 0) {
459 dev_err(dev
, "%s: i2c failure\n", __func__
);
463 dev_dbg(dev
, "Bootloader ID:%d Version:%d\n", buf
[1], buf
[2]);
467 dev_dbg(dev
, "Bootloader ID:%d\n", val
& MXT_BOOT_ID_MASK
);
473 static int mxt_check_bootloader(struct mxt_data
*data
, unsigned int state
,
476 struct device
*dev
= &data
->client
->dev
;
483 * In application update mode, the interrupt
484 * line signals state transitions. We must wait for the
485 * CHG assertion before reading the status byte.
486 * Once the status byte has been read, the line is deasserted.
488 ret
= mxt_wait_for_completion(data
, &data
->bl_completion
,
492 * TODO: handle -ERESTARTSYS better by terminating
493 * fw update process before returning to userspace
494 * by writing length 0x000 to device (iff we are in
495 * WAITING_FRAME_DATA state).
497 dev_err(dev
, "Update wait error %d\n", ret
);
502 ret
= mxt_bootloader_read(data
, &val
, 1);
506 if (state
== MXT_WAITING_BOOTLOAD_CMD
)
507 val
= mxt_get_bootloader_version(data
, val
);
510 case MXT_WAITING_BOOTLOAD_CMD
:
511 case MXT_WAITING_FRAME_DATA
:
512 case MXT_APP_CRC_FAIL
:
513 val
&= ~MXT_BOOT_STATUS_MASK
;
515 case MXT_FRAME_CRC_PASS
:
516 if (val
== MXT_FRAME_CRC_CHECK
) {
518 } else if (val
== MXT_FRAME_CRC_FAIL
) {
519 dev_err(dev
, "Bootloader CRC fail\n");
528 dev_err(dev
, "Invalid bootloader state %02X != %02X\n",
536 static int mxt_send_bootloader_cmd(struct mxt_data
*data
, bool unlock
)
542 buf
[0] = MXT_UNLOCK_CMD_LSB
;
543 buf
[1] = MXT_UNLOCK_CMD_MSB
;
549 ret
= mxt_bootloader_write(data
, buf
, 2);
556 static int __mxt_read_reg(struct i2c_client
*client
,
557 u16 reg
, u16 len
, void *val
)
559 struct i2c_msg xfer
[2];
564 buf
[1] = (reg
>> 8) & 0xff;
567 xfer
[0].addr
= client
->addr
;
573 xfer
[1].addr
= client
->addr
;
574 xfer
[1].flags
= I2C_M_RD
;
578 ret
= i2c_transfer(client
->adapter
, xfer
, 2);
584 dev_err(&client
->dev
, "%s: i2c transfer failed (%d)\n",
591 static int __mxt_write_reg(struct i2c_client
*client
, u16 reg
, u16 len
,
599 buf
= kmalloc(count
, GFP_KERNEL
);
604 buf
[1] = (reg
>> 8) & 0xff;
605 memcpy(&buf
[2], val
, len
);
607 ret
= i2c_master_send(client
, buf
, count
);
613 dev_err(&client
->dev
, "%s: i2c send failed (%d)\n",
621 static int mxt_write_reg(struct i2c_client
*client
, u16 reg
, u8 val
)
623 return __mxt_write_reg(client
, reg
, 1, &val
);
626 static struct mxt_object
*
627 mxt_get_object(struct mxt_data
*data
, u8 type
)
629 struct mxt_object
*object
;
632 for (i
= 0; i
< data
->info
.object_num
; i
++) {
633 object
= data
->object_table
+ i
;
634 if (object
->type
== type
)
638 dev_warn(&data
->client
->dev
, "Invalid object type T%u\n", type
);
642 static void mxt_proc_t6_messages(struct mxt_data
*data
, u8
*msg
)
644 struct device
*dev
= &data
->client
->dev
;
646 u32 crc
= msg
[2] | (msg
[3] << 8) | (msg
[4] << 16);
648 complete(&data
->crc_completion
);
650 if (crc
!= data
->config_crc
) {
651 data
->config_crc
= crc
;
652 dev_dbg(dev
, "T6 Config Checksum: 0x%06X\n", crc
);
656 if (status
& MXT_T6_STATUS_RESET
)
657 complete(&data
->reset_completion
);
659 /* Output debug if status has changed */
660 if (status
!= data
->t6_status
)
661 dev_dbg(dev
, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
663 status
== 0 ? " OK" : "",
664 status
& MXT_T6_STATUS_RESET
? " RESET" : "",
665 status
& MXT_T6_STATUS_OFL
? " OFL" : "",
666 status
& MXT_T6_STATUS_SIGERR
? " SIGERR" : "",
667 status
& MXT_T6_STATUS_CAL
? " CAL" : "",
668 status
& MXT_T6_STATUS_CFGERR
? " CFGERR" : "",
669 status
& MXT_T6_STATUS_COMSERR
? " COMSERR" : "");
671 /* Save current status */
672 data
->t6_status
= status
;
675 static void mxt_input_button(struct mxt_data
*data
, u8
*message
)
677 struct input_dev
*input
= data
->input_dev
;
678 const struct mxt_platform_data
*pdata
= data
->pdata
;
682 /* Active-low switch */
683 for (i
= 0; i
< pdata
->t19_num_keys
; i
++) {
684 if (pdata
->t19_keymap
[i
] == KEY_RESERVED
)
686 button
= !(message
[1] & (1 << i
));
687 input_report_key(input
, pdata
->t19_keymap
[i
], button
);
691 static void mxt_input_sync(struct mxt_data
*data
)
693 input_mt_report_pointer_emulation(data
->input_dev
,
694 data
->pdata
->t19_num_keys
);
695 input_sync(data
->input_dev
);
698 static void mxt_proc_t9_message(struct mxt_data
*data
, u8
*message
)
700 struct device
*dev
= &data
->client
->dev
;
701 struct input_dev
*input_dev
= data
->input_dev
;
709 id
= message
[0] - data
->T9_reportid_min
;
711 x
= (message
[2] << 4) | ((message
[4] >> 4) & 0xf);
712 y
= (message
[3] << 4) | ((message
[4] & 0xf));
714 /* Handle 10/12 bit switching */
715 if (data
->max_x
< 1024)
717 if (data
->max_y
< 1024)
721 amplitude
= message
[6];
724 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
726 (status
& MXT_T9_DETECT
) ? 'D' : '.',
727 (status
& MXT_T9_PRESS
) ? 'P' : '.',
728 (status
& MXT_T9_RELEASE
) ? 'R' : '.',
729 (status
& MXT_T9_MOVE
) ? 'M' : '.',
730 (status
& MXT_T9_VECTOR
) ? 'V' : '.',
731 (status
& MXT_T9_AMP
) ? 'A' : '.',
732 (status
& MXT_T9_SUPPRESS
) ? 'S' : '.',
733 (status
& MXT_T9_UNGRIP
) ? 'U' : '.',
734 x
, y
, area
, amplitude
);
736 input_mt_slot(input_dev
, id
);
738 if (status
& MXT_T9_DETECT
) {
740 * Multiple bits may be set if the host is slow to read
741 * the status messages, indicating all the events that
744 if (status
& MXT_T9_RELEASE
) {
745 input_mt_report_slot_state(input_dev
,
747 mxt_input_sync(data
);
751 input_mt_report_slot_state(input_dev
, MT_TOOL_FINGER
, 1);
752 input_report_abs(input_dev
, ABS_MT_POSITION_X
, x
);
753 input_report_abs(input_dev
, ABS_MT_POSITION_Y
, y
);
754 input_report_abs(input_dev
, ABS_MT_PRESSURE
, amplitude
);
755 input_report_abs(input_dev
, ABS_MT_TOUCH_MAJOR
, area
);
757 /* Touch no longer active, close out slot */
758 input_mt_report_slot_state(input_dev
, MT_TOOL_FINGER
, 0);
761 data
->update_input
= true;
764 static int mxt_proc_message(struct mxt_data
*data
, u8
*message
)
766 u8 report_id
= message
[0];
768 if (report_id
== MXT_RPTID_NOMSG
)
771 if (report_id
== data
->T6_reportid
) {
772 mxt_proc_t6_messages(data
, message
);
773 } else if (!data
->input_dev
) {
775 * Do not report events if input device
776 * is not yet registered.
778 mxt_dump_message(data
, message
);
779 } else if (report_id
>= data
->T9_reportid_min
780 && report_id
<= data
->T9_reportid_max
) {
781 mxt_proc_t9_message(data
, message
);
782 } else if (report_id
== data
->T19_reportid
) {
783 mxt_input_button(data
, message
);
784 data
->update_input
= true;
786 mxt_dump_message(data
, message
);
792 static int mxt_read_and_process_messages(struct mxt_data
*data
, u8 count
)
794 struct device
*dev
= &data
->client
->dev
;
799 /* Safety check for msg_buf */
800 if (count
> data
->max_reportid
)
803 /* Process remaining messages if necessary */
804 ret
= __mxt_read_reg(data
->client
, data
->T5_address
,
805 data
->T5_msg_size
* count
, data
->msg_buf
);
807 dev_err(dev
, "Failed to read %u messages (%d)\n", count
, ret
);
811 for (i
= 0; i
< count
; i
++) {
812 ret
= mxt_proc_message(data
,
813 data
->msg_buf
+ data
->T5_msg_size
* i
);
819 /* return number of messages read */
823 static irqreturn_t
mxt_process_messages_t44(struct mxt_data
*data
)
825 struct device
*dev
= &data
->client
->dev
;
829 /* Read T44 and T5 together */
830 ret
= __mxt_read_reg(data
->client
, data
->T44_address
,
831 data
->T5_msg_size
+ 1, data
->msg_buf
);
833 dev_err(dev
, "Failed to read T44 and T5 (%d)\n", ret
);
837 count
= data
->msg_buf
[0];
841 * This condition is caused by the CHG line being configured
842 * in Mode 0. It results in unnecessary I2C operations but it
845 dev_dbg(dev
, "Interrupt triggered but zero messages\n");
847 } else if (count
> data
->max_reportid
) {
848 dev_err(dev
, "T44 count %d exceeded max report id\n", count
);
849 count
= data
->max_reportid
;
852 /* Process first message */
853 ret
= mxt_proc_message(data
, data
->msg_buf
+ 1);
855 dev_warn(dev
, "Unexpected invalid message\n");
859 num_left
= count
- 1;
861 /* Process remaining messages if necessary */
863 ret
= mxt_read_and_process_messages(data
, num_left
);
866 else if (ret
!= num_left
)
867 dev_warn(dev
, "Unexpected invalid message\n");
871 if (data
->update_input
) {
872 mxt_input_sync(data
);
873 data
->update_input
= false;
879 static int mxt_process_messages_until_invalid(struct mxt_data
*data
)
881 struct device
*dev
= &data
->client
->dev
;
885 count
= data
->max_reportid
;
887 /* Read messages until we force an invalid */
889 read
= mxt_read_and_process_messages(data
, count
);
894 if (data
->update_input
) {
895 mxt_input_sync(data
);
896 data
->update_input
= false;
899 dev_err(dev
, "CHG pin isn't cleared\n");
903 static irqreturn_t
mxt_process_messages(struct mxt_data
*data
)
905 int total_handled
, num_handled
;
906 u8 count
= data
->last_message_count
;
908 if (count
< 1 || count
> data
->max_reportid
)
911 /* include final invalid message */
912 total_handled
= mxt_read_and_process_messages(data
, count
+ 1);
913 if (total_handled
< 0)
915 /* if there were invalid messages, then we are done */
916 else if (total_handled
<= count
)
919 /* keep reading two msgs until one is invalid or reportid limit */
921 num_handled
= mxt_read_and_process_messages(data
, 2);
925 total_handled
+= num_handled
;
929 } while (total_handled
< data
->num_touchids
);
932 data
->last_message_count
= total_handled
;
934 if (data
->update_input
) {
935 mxt_input_sync(data
);
936 data
->update_input
= false;
942 static irqreturn_t
mxt_interrupt(int irq
, void *dev_id
)
944 struct mxt_data
*data
= dev_id
;
946 if (data
->in_bootloader
) {
947 /* bootloader state transition completion */
948 complete(&data
->bl_completion
);
952 if (!data
->object_table
)
955 if (data
->T44_address
) {
956 return mxt_process_messages_t44(data
);
958 return mxt_process_messages(data
);
962 static int mxt_t6_command(struct mxt_data
*data
, u16 cmd_offset
,
967 int timeout_counter
= 0;
970 reg
= data
->T6_address
+ cmd_offset
;
972 ret
= mxt_write_reg(data
->client
, reg
, value
);
981 ret
= __mxt_read_reg(data
->client
, reg
, 1, &command_register
);
984 } while (command_register
!= 0 && timeout_counter
++ <= 100);
986 if (timeout_counter
> 100) {
987 dev_err(&data
->client
->dev
, "Command failed!\n");
994 static int mxt_soft_reset(struct mxt_data
*data
)
996 struct device
*dev
= &data
->client
->dev
;
999 dev_info(dev
, "Resetting chip\n");
1001 reinit_completion(&data
->reset_completion
);
1003 ret
= mxt_t6_command(data
, MXT_COMMAND_RESET
, MXT_RESET_VALUE
, false);
1007 ret
= mxt_wait_for_completion(data
, &data
->reset_completion
,
1015 static void mxt_update_crc(struct mxt_data
*data
, u8 cmd
, u8 value
)
1018 * On failure, CRC is set to 0 and config will always be
1021 data
->config_crc
= 0;
1022 reinit_completion(&data
->crc_completion
);
1024 mxt_t6_command(data
, cmd
, value
, true);
1027 * Wait for crc message. On failure, CRC is set to 0 and config will
1028 * always be downloaded.
1030 mxt_wait_for_completion(data
, &data
->crc_completion
, MXT_CRC_TIMEOUT
);
1033 static void mxt_calc_crc24(u32
*crc
, u8 firstbyte
, u8 secondbyte
)
1035 static const unsigned int crcpoly
= 0x80001B;
1039 data_word
= (secondbyte
<< 8) | firstbyte
;
1040 result
= ((*crc
<< 1) ^ data_word
);
1042 if (result
& 0x1000000)
1048 static u32
mxt_calculate_crc(u8
*base
, off_t start_off
, off_t end_off
)
1051 u8
*ptr
= base
+ start_off
;
1052 u8
*last_val
= base
+ end_off
- 1;
1054 if (end_off
< start_off
)
1057 while (ptr
< last_val
) {
1058 mxt_calc_crc24(&crc
, *ptr
, *(ptr
+ 1));
1062 /* if len is odd, fill the last byte with 0 */
1063 if (ptr
== last_val
)
1064 mxt_calc_crc24(&crc
, *ptr
, 0);
1066 /* Mask to 24-bit */
1072 static int mxt_prepare_cfg_mem(struct mxt_data
*data
,
1073 const struct firmware
*cfg
,
1074 unsigned int data_pos
,
1075 unsigned int cfg_start_ofs
,
1077 size_t config_mem_size
)
1079 struct device
*dev
= &data
->client
->dev
;
1080 struct mxt_object
*object
;
1081 unsigned int type
, instance
, size
, byte_offset
;
1088 while (data_pos
< cfg
->size
) {
1089 /* Read type, instance, length */
1090 ret
= sscanf(cfg
->data
+ data_pos
, "%x %x %x%n",
1091 &type
, &instance
, &size
, &offset
);
1095 } else if (ret
!= 3) {
1096 dev_err(dev
, "Bad format: failed to parse object\n");
1101 object
= mxt_get_object(data
, type
);
1104 for (i
= 0; i
< size
; i
++) {
1105 ret
= sscanf(cfg
->data
+ data_pos
, "%hhx%n",
1108 dev_err(dev
, "Bad format in T%d at %d\n",
1117 if (size
> mxt_obj_size(object
)) {
1119 * Either we are in fallback mode due to wrong
1120 * config or config from a later fw version,
1121 * or the file is corrupt or hand-edited.
1123 dev_warn(dev
, "Discarding %zu byte(s) in T%u\n",
1124 size
- mxt_obj_size(object
), type
);
1125 } else if (mxt_obj_size(object
) > size
) {
1127 * If firmware is upgraded, new bytes may be added to
1128 * end of objects. It is generally forward compatible
1129 * to zero these bytes - previous behaviour will be
1130 * retained. However this does invalidate the CRC and
1131 * will force fallback mode until the configuration is
1132 * updated. We warn here but do nothing else - the
1133 * malloc has zeroed the entire configuration.
1135 dev_warn(dev
, "Zeroing %zu byte(s) in T%d\n",
1136 mxt_obj_size(object
) - size
, type
);
1139 if (instance
>= mxt_obj_instances(object
)) {
1140 dev_err(dev
, "Object instances exceeded!\n");
1144 reg
= object
->start_address
+ mxt_obj_size(object
) * instance
;
1146 for (i
= 0; i
< size
; i
++) {
1147 ret
= sscanf(cfg
->data
+ data_pos
, "%hhx%n",
1151 dev_err(dev
, "Bad format in T%d at %d\n",
1157 if (i
> mxt_obj_size(object
))
1160 byte_offset
= reg
+ i
- cfg_start_ofs
;
1162 if (byte_offset
>= 0 && byte_offset
< config_mem_size
) {
1163 *(config_mem
+ byte_offset
) = val
;
1165 dev_err(dev
, "Bad object: reg:%d, T%d, ofs=%d\n",
1166 reg
, object
->type
, byte_offset
);
1175 static int mxt_upload_cfg_mem(struct mxt_data
*data
, unsigned int cfg_start
,
1176 u8
*config_mem
, size_t config_mem_size
)
1178 unsigned int byte_offset
= 0;
1181 /* Write configuration as blocks */
1182 while (byte_offset
< config_mem_size
) {
1183 unsigned int size
= config_mem_size
- byte_offset
;
1185 if (size
> MXT_MAX_BLOCK_WRITE
)
1186 size
= MXT_MAX_BLOCK_WRITE
;
1188 error
= __mxt_write_reg(data
->client
,
1189 cfg_start
+ byte_offset
,
1190 size
, config_mem
+ byte_offset
);
1192 dev_err(&data
->client
->dev
,
1193 "Config write error, ret=%d\n", error
);
1197 byte_offset
+= size
;
1204 * mxt_update_cfg - download configuration to chip
1206 * Atmel Raw Config File Format
1208 * The first four lines of the raw config file contain:
1210 * 2) Chip ID Information (first 7 bytes of device memory)
1211 * 3) Chip Information Block 24-bit CRC Checksum
1212 * 4) Chip Configuration 24-bit CRC Checksum
1214 * The rest of the file consists of one line per object instance:
1215 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1217 * <TYPE> - 2-byte object type as hex
1218 * <INSTANCE> - 2-byte object instance number as hex
1219 * <SIZE> - 2-byte object size as hex
1220 * <CONTENTS> - array of <SIZE> 1-byte hex values
1222 static int mxt_update_cfg(struct mxt_data
*data
, const struct firmware
*cfg
)
1224 struct device
*dev
= &data
->client
->dev
;
1225 struct mxt_info cfg_info
;
1231 u32 info_crc
, config_crc
, calculated_crc
;
1233 size_t config_mem_size
;
1235 mxt_update_crc(data
, MXT_COMMAND_REPORTALL
, 1);
1237 if (strncmp(cfg
->data
, MXT_CFG_MAGIC
, strlen(MXT_CFG_MAGIC
))) {
1238 dev_err(dev
, "Unrecognised config file\n");
1242 data_pos
= strlen(MXT_CFG_MAGIC
);
1244 /* Load information block and check */
1245 for (i
= 0; i
< sizeof(struct mxt_info
); i
++) {
1246 ret
= sscanf(cfg
->data
+ data_pos
, "%hhx%n",
1247 (unsigned char *)&cfg_info
+ i
,
1250 dev_err(dev
, "Bad format\n");
1257 if (cfg_info
.family_id
!= data
->info
.family_id
) {
1258 dev_err(dev
, "Family ID mismatch!\n");
1262 if (cfg_info
.variant_id
!= data
->info
.variant_id
) {
1263 dev_err(dev
, "Variant ID mismatch!\n");
1268 ret
= sscanf(cfg
->data
+ data_pos
, "%x%n", &info_crc
, &offset
);
1270 dev_err(dev
, "Bad format: failed to parse Info CRC\n");
1275 ret
= sscanf(cfg
->data
+ data_pos
, "%x%n", &config_crc
, &offset
);
1277 dev_err(dev
, "Bad format: failed to parse Config CRC\n");
1283 * The Info Block CRC is calculated over mxt_info and the object
1284 * table. If it does not match then we are trying to load the
1285 * configuration from a different chip or firmware version, so
1286 * the configuration CRC is invalid anyway.
1288 if (info_crc
== data
->info_crc
) {
1289 if (config_crc
== 0 || data
->config_crc
== 0) {
1290 dev_info(dev
, "CRC zero, attempting to apply config\n");
1291 } else if (config_crc
== data
->config_crc
) {
1292 dev_dbg(dev
, "Config CRC 0x%06X: OK\n",
1296 dev_info(dev
, "Config CRC 0x%06X: does not match file 0x%06X\n",
1297 data
->config_crc
, config_crc
);
1301 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1302 data
->info_crc
, info_crc
);
1305 /* Malloc memory to store configuration */
1306 cfg_start_ofs
= MXT_OBJECT_START
+
1307 data
->info
.object_num
* sizeof(struct mxt_object
) +
1308 MXT_INFO_CHECKSUM_SIZE
;
1309 config_mem_size
= data
->mem_size
- cfg_start_ofs
;
1310 config_mem
= kzalloc(config_mem_size
, GFP_KERNEL
);
1312 dev_err(dev
, "Failed to allocate memory\n");
1316 ret
= mxt_prepare_cfg_mem(data
, cfg
, data_pos
, cfg_start_ofs
,
1317 config_mem
, config_mem_size
);
1321 /* Calculate crc of the received configs (not the raw config file) */
1322 if (data
->T7_address
< cfg_start_ofs
) {
1323 dev_err(dev
, "Bad T7 address, T7addr = %x, config offset %x\n",
1324 data
->T7_address
, cfg_start_ofs
);
1329 calculated_crc
= mxt_calculate_crc(config_mem
,
1330 data
->T7_address
- cfg_start_ofs
,
1333 if (config_crc
> 0 && config_crc
!= calculated_crc
)
1334 dev_warn(dev
, "Config CRC error, calculated=%06X, file=%06X\n",
1335 calculated_crc
, config_crc
);
1337 ret
= mxt_upload_cfg_mem(data
, cfg_start_ofs
,
1338 config_mem
, config_mem_size
);
1342 mxt_update_crc(data
, MXT_COMMAND_BACKUPNV
, MXT_BACKUP_VALUE
);
1344 ret
= mxt_soft_reset(data
);
1348 dev_info(dev
, "Config successfully updated\n");
1355 static int mxt_acquire_irq(struct mxt_data
*data
)
1359 enable_irq(data
->irq
);
1361 error
= mxt_process_messages_until_invalid(data
);
1368 static int mxt_get_info(struct mxt_data
*data
)
1370 struct i2c_client
*client
= data
->client
;
1371 struct mxt_info
*info
= &data
->info
;
1374 /* Read 7-byte info block starting at address 0 */
1375 error
= __mxt_read_reg(client
, MXT_INFO
, sizeof(*info
), info
);
1382 static void mxt_free_input_device(struct mxt_data
*data
)
1384 if (data
->input_dev
) {
1385 input_unregister_device(data
->input_dev
);
1386 data
->input_dev
= NULL
;
1390 static void mxt_free_object_table(struct mxt_data
*data
)
1392 kfree(data
->object_table
);
1393 data
->object_table
= NULL
;
1394 kfree(data
->msg_buf
);
1395 data
->msg_buf
= NULL
;
1396 data
->T5_address
= 0;
1397 data
->T5_msg_size
= 0;
1398 data
->T6_reportid
= 0;
1399 data
->T7_address
= 0;
1400 data
->T9_reportid_min
= 0;
1401 data
->T9_reportid_max
= 0;
1402 data
->T19_reportid
= 0;
1403 data
->T44_address
= 0;
1404 data
->max_reportid
= 0;
1407 static int mxt_get_object_table(struct mxt_data
*data
)
1409 struct i2c_client
*client
= data
->client
;
1411 struct mxt_object
*object_table
;
1417 table_size
= data
->info
.object_num
* sizeof(struct mxt_object
);
1418 object_table
= kzalloc(table_size
, GFP_KERNEL
);
1419 if (!object_table
) {
1420 dev_err(&data
->client
->dev
, "Failed to allocate memory\n");
1424 error
= __mxt_read_reg(client
, MXT_OBJECT_START
, table_size
,
1427 kfree(object_table
);
1431 /* Valid Report IDs start counting from 1 */
1434 for (i
= 0; i
< data
->info
.object_num
; i
++) {
1435 struct mxt_object
*object
= object_table
+ i
;
1438 le16_to_cpus(&object
->start_address
);
1440 if (object
->num_report_ids
) {
1442 reportid
+= object
->num_report_ids
*
1443 mxt_obj_instances(object
);
1444 max_id
= reportid
- 1;
1450 dev_dbg(&data
->client
->dev
,
1451 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1452 object
->type
, object
->start_address
,
1453 mxt_obj_size(object
), mxt_obj_instances(object
),
1456 switch (object
->type
) {
1457 case MXT_GEN_MESSAGE_T5
:
1458 if (data
->info
.family_id
== 0x80 &&
1459 data
->info
.version
< 0x20) {
1461 * On mXT224 firmware versions prior to V2.0
1462 * read and discard unused CRC byte otherwise
1463 * DMA reads are misaligned.
1465 data
->T5_msg_size
= mxt_obj_size(object
);
1467 /* CRC not enabled, so skip last byte */
1468 data
->T5_msg_size
= mxt_obj_size(object
) - 1;
1470 data
->T5_address
= object
->start_address
;
1472 case MXT_GEN_COMMAND_T6
:
1473 data
->T6_reportid
= min_id
;
1474 data
->T6_address
= object
->start_address
;
1476 case MXT_GEN_POWER_T7
:
1477 data
->T7_address
= object
->start_address
;
1479 case MXT_TOUCH_MULTI_T9
:
1480 data
->T9_reportid_min
= min_id
;
1481 data
->T9_reportid_max
= max_id
;
1482 data
->num_touchids
= object
->num_report_ids
1483 * mxt_obj_instances(object
);
1485 case MXT_SPT_MESSAGECOUNT_T44
:
1486 data
->T44_address
= object
->start_address
;
1488 case MXT_SPT_GPIOPWM_T19
:
1489 data
->T19_reportid
= min_id
;
1493 end_address
= object
->start_address
1494 + mxt_obj_size(object
) * mxt_obj_instances(object
) - 1;
1496 if (end_address
>= data
->mem_size
)
1497 data
->mem_size
= end_address
+ 1;
1500 /* Store maximum reportid */
1501 data
->max_reportid
= reportid
;
1503 /* If T44 exists, T5 position has to be directly after */
1504 if (data
->T44_address
&& (data
->T5_address
!= data
->T44_address
+ 1)) {
1505 dev_err(&client
->dev
, "Invalid T44 position\n");
1507 goto free_object_table
;
1510 data
->msg_buf
= kcalloc(data
->max_reportid
,
1511 data
->T5_msg_size
, GFP_KERNEL
);
1512 if (!data
->msg_buf
) {
1513 dev_err(&client
->dev
, "Failed to allocate message buffer\n");
1515 goto free_object_table
;
1518 data
->object_table
= object_table
;
1523 mxt_free_object_table(data
);
1527 static int mxt_read_t9_resolution(struct mxt_data
*data
)
1529 struct i2c_client
*client
= data
->client
;
1531 struct t9_range range
;
1532 unsigned char orient
;
1533 struct mxt_object
*object
;
1535 object
= mxt_get_object(data
, MXT_TOUCH_MULTI_T9
);
1539 error
= __mxt_read_reg(client
,
1540 object
->start_address
+ MXT_T9_RANGE
,
1541 sizeof(range
), &range
);
1545 le16_to_cpus(&range
.x
);
1546 le16_to_cpus(&range
.y
);
1548 error
= __mxt_read_reg(client
,
1549 object
->start_address
+ MXT_T9_ORIENT
,
1554 /* Handle default values */
1561 if (orient
& MXT_T9_ORIENT_SWITCH
) {
1562 data
->max_x
= range
.y
;
1563 data
->max_y
= range
.x
;
1565 data
->max_x
= range
.x
;
1566 data
->max_y
= range
.y
;
1569 dev_dbg(&client
->dev
,
1570 "Touchscreen size X%uY%u\n", data
->max_x
, data
->max_y
);
1575 static int mxt_input_open(struct input_dev
*dev
);
1576 static void mxt_input_close(struct input_dev
*dev
);
1578 static int mxt_initialize_t9_input_device(struct mxt_data
*data
)
1580 struct device
*dev
= &data
->client
->dev
;
1581 const struct mxt_platform_data
*pdata
= data
->pdata
;
1582 struct input_dev
*input_dev
;
1584 unsigned int num_mt_slots
;
1585 unsigned int mt_flags
= 0;
1588 error
= mxt_read_t9_resolution(data
);
1590 dev_warn(dev
, "Failed to initialize T9 resolution\n");
1592 input_dev
= input_allocate_device();
1594 dev_err(dev
, "Failed to allocate memory\n");
1598 input_dev
->name
= "Atmel maXTouch Touchscreen";
1599 input_dev
->phys
= data
->phys
;
1600 input_dev
->id
.bustype
= BUS_I2C
;
1601 input_dev
->dev
.parent
= dev
;
1602 input_dev
->open
= mxt_input_open
;
1603 input_dev
->close
= mxt_input_close
;
1605 __set_bit(EV_ABS
, input_dev
->evbit
);
1606 __set_bit(EV_KEY
, input_dev
->evbit
);
1607 __set_bit(BTN_TOUCH
, input_dev
->keybit
);
1609 if (pdata
->t19_num_keys
) {
1610 __set_bit(INPUT_PROP_BUTTONPAD
, input_dev
->propbit
);
1612 for (i
= 0; i
< pdata
->t19_num_keys
; i
++)
1613 if (pdata
->t19_keymap
[i
] != KEY_RESERVED
)
1614 input_set_capability(input_dev
, EV_KEY
,
1615 pdata
->t19_keymap
[i
]);
1617 mt_flags
|= INPUT_MT_POINTER
;
1619 input_abs_set_res(input_dev
, ABS_X
, MXT_PIXELS_PER_MM
);
1620 input_abs_set_res(input_dev
, ABS_Y
, MXT_PIXELS_PER_MM
);
1621 input_abs_set_res(input_dev
, ABS_MT_POSITION_X
,
1623 input_abs_set_res(input_dev
, ABS_MT_POSITION_Y
,
1626 input_dev
->name
= "Atmel maXTouch Touchpad";
1629 /* For single touch */
1630 input_set_abs_params(input_dev
, ABS_X
,
1631 0, data
->max_x
, 0, 0);
1632 input_set_abs_params(input_dev
, ABS_Y
,
1633 0, data
->max_y
, 0, 0);
1634 input_set_abs_params(input_dev
, ABS_PRESSURE
,
1637 /* For multi touch */
1638 num_mt_slots
= data
->T9_reportid_max
- data
->T9_reportid_min
+ 1;
1639 error
= input_mt_init_slots(input_dev
, num_mt_slots
, mt_flags
);
1641 dev_err(dev
, "Error %d initialising slots\n", error
);
1645 input_set_abs_params(input_dev
, ABS_MT_TOUCH_MAJOR
,
1646 0, MXT_MAX_AREA
, 0, 0);
1647 input_set_abs_params(input_dev
, ABS_MT_POSITION_X
,
1648 0, data
->max_x
, 0, 0);
1649 input_set_abs_params(input_dev
, ABS_MT_POSITION_Y
,
1650 0, data
->max_y
, 0, 0);
1651 input_set_abs_params(input_dev
, ABS_MT_PRESSURE
,
1654 input_set_drvdata(input_dev
, data
);
1656 error
= input_register_device(input_dev
);
1658 dev_err(dev
, "Error %d registering input device\n", error
);
1662 data
->input_dev
= input_dev
;
1667 input_free_device(input_dev
);
1671 static int mxt_configure_objects(struct mxt_data
*data
,
1672 const struct firmware
*cfg
);
1674 static void mxt_config_cb(const struct firmware
*cfg
, void *ctx
)
1676 mxt_configure_objects(ctx
, cfg
);
1677 release_firmware(cfg
);
1680 static int mxt_initialize(struct mxt_data
*data
)
1682 struct i2c_client
*client
= data
->client
;
1683 int recovery_attempts
= 0;
1687 error
= mxt_get_info(data
);
1691 /* Check bootloader state */
1692 error
= mxt_probe_bootloader(data
, false);
1694 dev_info(&client
->dev
, "Trying alternate bootloader address\n");
1695 error
= mxt_probe_bootloader(data
, true);
1697 /* Chip is not in appmode or bootloader mode */
1702 /* OK, we are in bootloader, see if we can recover */
1703 if (++recovery_attempts
> 1) {
1704 dev_err(&client
->dev
, "Could not recover from bootloader mode\n");
1706 * We can reflash from this state, so do not
1707 * abort initialization.
1709 data
->in_bootloader
= true;
1713 /* Attempt to exit bootloader into app mode */
1714 mxt_send_bootloader_cmd(data
, false);
1715 msleep(MXT_FW_RESET_TIME
);
1718 /* Get object table information */
1719 error
= mxt_get_object_table(data
);
1721 dev_err(&client
->dev
, "Error %d reading object table\n", error
);
1725 error
= mxt_acquire_irq(data
);
1727 goto err_free_object_table
;
1729 error
= request_firmware_nowait(THIS_MODULE
, true, MXT_CFG_NAME
,
1730 &client
->dev
, GFP_KERNEL
, data
,
1733 dev_err(&client
->dev
, "Failed to invoke firmware loader: %d\n",
1735 goto err_free_object_table
;
1740 err_free_object_table
:
1741 mxt_free_object_table(data
);
1745 static int mxt_set_t7_power_cfg(struct mxt_data
*data
, u8 sleep
)
1747 struct device
*dev
= &data
->client
->dev
;
1749 struct t7_config
*new_config
;
1750 struct t7_config deepsleep
= { .active
= 0, .idle
= 0 };
1752 if (sleep
== MXT_POWER_CFG_DEEPSLEEP
)
1753 new_config
= &deepsleep
;
1755 new_config
= &data
->t7_cfg
;
1757 error
= __mxt_write_reg(data
->client
, data
->T7_address
,
1758 sizeof(data
->t7_cfg
), new_config
);
1762 dev_dbg(dev
, "Set T7 ACTV:%d IDLE:%d\n",
1763 new_config
->active
, new_config
->idle
);
1768 static int mxt_init_t7_power_cfg(struct mxt_data
*data
)
1770 struct device
*dev
= &data
->client
->dev
;
1775 error
= __mxt_read_reg(data
->client
, data
->T7_address
,
1776 sizeof(data
->t7_cfg
), &data
->t7_cfg
);
1780 if (data
->t7_cfg
.active
== 0 || data
->t7_cfg
.idle
== 0) {
1782 dev_dbg(dev
, "T7 cfg zero, resetting\n");
1783 mxt_soft_reset(data
);
1787 dev_dbg(dev
, "T7 cfg zero after reset, overriding\n");
1788 data
->t7_cfg
.active
= 20;
1789 data
->t7_cfg
.idle
= 100;
1790 return mxt_set_t7_power_cfg(data
, MXT_POWER_CFG_RUN
);
1794 dev_dbg(dev
, "Initialized power cfg: ACTV %d, IDLE %d\n",
1795 data
->t7_cfg
.active
, data
->t7_cfg
.idle
);
1799 static int mxt_configure_objects(struct mxt_data
*data
,
1800 const struct firmware
*cfg
)
1802 struct device
*dev
= &data
->client
->dev
;
1803 struct mxt_info
*info
= &data
->info
;
1807 error
= mxt_update_cfg(data
, cfg
);
1809 dev_warn(dev
, "Error %d updating config\n", error
);
1812 error
= mxt_init_t7_power_cfg(data
);
1814 dev_err(dev
, "Failed to initialize power cfg\n");
1818 error
= mxt_initialize_t9_input_device(data
);
1823 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
1824 info
->family_id
, info
->variant_id
, info
->version
>> 4,
1825 info
->version
& 0xf, info
->build
, info
->object_num
);
1830 /* Firmware Version is returned as Major.Minor.Build */
1831 static ssize_t
mxt_fw_version_show(struct device
*dev
,
1832 struct device_attribute
*attr
, char *buf
)
1834 struct mxt_data
*data
= dev_get_drvdata(dev
);
1835 struct mxt_info
*info
= &data
->info
;
1836 return scnprintf(buf
, PAGE_SIZE
, "%u.%u.%02X\n",
1837 info
->version
>> 4, info
->version
& 0xf, info
->build
);
1840 /* Hardware Version is returned as FamilyID.VariantID */
1841 static ssize_t
mxt_hw_version_show(struct device
*dev
,
1842 struct device_attribute
*attr
, char *buf
)
1844 struct mxt_data
*data
= dev_get_drvdata(dev
);
1845 struct mxt_info
*info
= &data
->info
;
1846 return scnprintf(buf
, PAGE_SIZE
, "%u.%u\n",
1847 info
->family_id
, info
->variant_id
);
1850 static ssize_t
mxt_show_instance(char *buf
, int count
,
1851 struct mxt_object
*object
, int instance
,
1856 if (mxt_obj_instances(object
) > 1)
1857 count
+= scnprintf(buf
+ count
, PAGE_SIZE
- count
,
1858 "Instance %u\n", instance
);
1860 for (i
= 0; i
< mxt_obj_size(object
); i
++)
1861 count
+= scnprintf(buf
+ count
, PAGE_SIZE
- count
,
1862 "\t[%2u]: %02x (%d)\n", i
, val
[i
], val
[i
]);
1863 count
+= scnprintf(buf
+ count
, PAGE_SIZE
- count
, "\n");
1868 static ssize_t
mxt_object_show(struct device
*dev
,
1869 struct device_attribute
*attr
, char *buf
)
1871 struct mxt_data
*data
= dev_get_drvdata(dev
);
1872 struct mxt_object
*object
;
1878 /* Pre-allocate buffer large enough to hold max sized object. */
1879 obuf
= kmalloc(256, GFP_KERNEL
);
1884 for (i
= 0; i
< data
->info
.object_num
; i
++) {
1885 object
= data
->object_table
+ i
;
1887 if (!mxt_object_readable(object
->type
))
1890 count
+= scnprintf(buf
+ count
, PAGE_SIZE
- count
,
1891 "T%u:\n", object
->type
);
1893 for (j
= 0; j
< mxt_obj_instances(object
); j
++) {
1894 u16 size
= mxt_obj_size(object
);
1895 u16 addr
= object
->start_address
+ j
* size
;
1897 error
= __mxt_read_reg(data
->client
, addr
, size
, obuf
);
1901 count
= mxt_show_instance(buf
, count
, object
, j
, obuf
);
1907 return error
?: count
;
1910 static int mxt_check_firmware_format(struct device
*dev
,
1911 const struct firmware
*fw
)
1913 unsigned int pos
= 0;
1916 while (pos
< fw
->size
) {
1917 c
= *(fw
->data
+ pos
);
1919 if (c
< '0' || (c
> '9' && c
< 'A') || c
> 'F')
1926 * To convert file try:
1927 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
1929 dev_err(dev
, "Aborting: firmware file must be in binary format\n");
1934 static int mxt_load_fw(struct device
*dev
, const char *fn
)
1936 struct mxt_data
*data
= dev_get_drvdata(dev
);
1937 const struct firmware
*fw
= NULL
;
1938 unsigned int frame_size
;
1939 unsigned int pos
= 0;
1940 unsigned int retry
= 0;
1941 unsigned int frame
= 0;
1944 ret
= request_firmware(&fw
, fn
, dev
);
1946 dev_err(dev
, "Unable to open firmware %s\n", fn
);
1950 /* Check for incorrect enc file */
1951 ret
= mxt_check_firmware_format(dev
, fw
);
1953 goto release_firmware
;
1955 if (!data
->in_bootloader
) {
1956 /* Change to the bootloader mode */
1957 data
->in_bootloader
= true;
1959 ret
= mxt_t6_command(data
, MXT_COMMAND_RESET
,
1960 MXT_BOOT_VALUE
, false);
1962 goto release_firmware
;
1964 msleep(MXT_RESET_TIME
);
1966 /* Do not need to scan since we know family ID */
1967 ret
= mxt_lookup_bootloader_address(data
, 0);
1969 goto release_firmware
;
1971 mxt_free_input_device(data
);
1972 mxt_free_object_table(data
);
1974 enable_irq(data
->irq
);
1977 reinit_completion(&data
->bl_completion
);
1979 ret
= mxt_check_bootloader(data
, MXT_WAITING_BOOTLOAD_CMD
, false);
1981 /* Bootloader may still be unlocked from previous attempt */
1982 ret
= mxt_check_bootloader(data
, MXT_WAITING_FRAME_DATA
, false);
1986 dev_info(dev
, "Unlocking bootloader\n");
1988 /* Unlock bootloader */
1989 ret
= mxt_send_bootloader_cmd(data
, true);
1994 while (pos
< fw
->size
) {
1995 ret
= mxt_check_bootloader(data
, MXT_WAITING_FRAME_DATA
, true);
1999 frame_size
= ((*(fw
->data
+ pos
) << 8) | *(fw
->data
+ pos
+ 1));
2001 /* Take account of CRC bytes */
2004 /* Write one frame to device */
2005 ret
= mxt_bootloader_write(data
, fw
->data
+ pos
, frame_size
);
2009 ret
= mxt_check_bootloader(data
, MXT_FRAME_CRC_PASS
, true);
2013 /* Back off by 20ms per retry */
2017 dev_err(dev
, "Retry count exceeded\n");
2026 if (frame
% 50 == 0)
2027 dev_dbg(dev
, "Sent %d frames, %d/%zd bytes\n",
2028 frame
, pos
, fw
->size
);
2031 /* Wait for flash. */
2032 ret
= mxt_wait_for_completion(data
, &data
->bl_completion
,
2037 dev_dbg(dev
, "Sent %d frames, %d bytes\n", frame
, pos
);
2040 * Wait for device to reset. Some bootloader versions do not assert
2041 * the CHG line after bootloading has finished, so ignore potential
2044 mxt_wait_for_completion(data
, &data
->bl_completion
, MXT_FW_RESET_TIME
);
2046 data
->in_bootloader
= false;
2049 disable_irq(data
->irq
);
2051 release_firmware(fw
);
2055 static ssize_t
mxt_update_fw_store(struct device
*dev
,
2056 struct device_attribute
*attr
,
2057 const char *buf
, size_t count
)
2059 struct mxt_data
*data
= dev_get_drvdata(dev
);
2062 error
= mxt_load_fw(dev
, MXT_FW_NAME
);
2064 dev_err(dev
, "The firmware update failed(%d)\n", error
);
2067 dev_info(dev
, "The firmware update succeeded\n");
2069 error
= mxt_initialize(data
);
2077 static DEVICE_ATTR(fw_version
, S_IRUGO
, mxt_fw_version_show
, NULL
);
2078 static DEVICE_ATTR(hw_version
, S_IRUGO
, mxt_hw_version_show
, NULL
);
2079 static DEVICE_ATTR(object
, S_IRUGO
, mxt_object_show
, NULL
);
2080 static DEVICE_ATTR(update_fw
, S_IWUSR
, NULL
, mxt_update_fw_store
);
2082 static struct attribute
*mxt_attrs
[] = {
2083 &dev_attr_fw_version
.attr
,
2084 &dev_attr_hw_version
.attr
,
2085 &dev_attr_object
.attr
,
2086 &dev_attr_update_fw
.attr
,
2090 static const struct attribute_group mxt_attr_group
= {
2094 static void mxt_start(struct mxt_data
*data
)
2096 mxt_set_t7_power_cfg(data
, MXT_POWER_CFG_RUN
);
2098 /* Recalibrate since chip has been in deep sleep */
2099 mxt_t6_command(data
, MXT_COMMAND_CALIBRATE
, 1, false);
2102 static void mxt_stop(struct mxt_data
*data
)
2104 mxt_set_t7_power_cfg(data
, MXT_POWER_CFG_DEEPSLEEP
);
2107 static int mxt_input_open(struct input_dev
*dev
)
2109 struct mxt_data
*data
= input_get_drvdata(dev
);
2116 static void mxt_input_close(struct input_dev
*dev
)
2118 struct mxt_data
*data
= input_get_drvdata(dev
);
2124 static struct mxt_platform_data
*mxt_parse_dt(struct i2c_client
*client
)
2126 struct mxt_platform_data
*pdata
;
2129 int proplen
, i
, ret
;
2131 if (!client
->dev
.of_node
)
2132 return ERR_PTR(-ENODEV
);
2134 pdata
= devm_kzalloc(&client
->dev
, sizeof(*pdata
), GFP_KERNEL
);
2136 return ERR_PTR(-ENOMEM
);
2138 if (of_find_property(client
->dev
.of_node
, "linux,gpio-keymap",
2140 pdata
->t19_num_keys
= proplen
/ sizeof(u32
);
2142 keymap
= devm_kzalloc(&client
->dev
,
2143 pdata
->t19_num_keys
* sizeof(keymap
[0]),
2146 return ERR_PTR(-ENOMEM
);
2148 for (i
= 0; i
< pdata
->t19_num_keys
; i
++) {
2149 ret
= of_property_read_u32_index(client
->dev
.of_node
,
2150 "linux,gpio-keymap", i
, &keycode
);
2152 keycode
= KEY_RESERVED
;
2154 keymap
[i
] = keycode
;
2157 pdata
->t19_keymap
= keymap
;
2163 static struct mxt_platform_data
*mxt_parse_dt(struct i2c_client
*client
)
2165 dev_dbg(&client
->dev
, "No platform data specified\n");
2166 return ERR_PTR(-EINVAL
);
2170 static int mxt_probe(struct i2c_client
*client
, const struct i2c_device_id
*id
)
2172 struct mxt_data
*data
;
2173 const struct mxt_platform_data
*pdata
;
2176 pdata
= dev_get_platdata(&client
->dev
);
2178 pdata
= mxt_parse_dt(client
);
2180 return PTR_ERR(pdata
);
2183 data
= kzalloc(sizeof(struct mxt_data
), GFP_KERNEL
);
2185 dev_err(&client
->dev
, "Failed to allocate memory\n");
2189 snprintf(data
->phys
, sizeof(data
->phys
), "i2c-%u-%04x/input0",
2190 client
->adapter
->nr
, client
->addr
);
2192 data
->client
= client
;
2193 data
->pdata
= pdata
;
2194 data
->irq
= client
->irq
;
2195 i2c_set_clientdata(client
, data
);
2197 init_completion(&data
->bl_completion
);
2198 init_completion(&data
->reset_completion
);
2199 init_completion(&data
->crc_completion
);
2201 error
= request_threaded_irq(client
->irq
, NULL
, mxt_interrupt
,
2202 pdata
->irqflags
| IRQF_ONESHOT
,
2203 client
->name
, data
);
2205 dev_err(&client
->dev
, "Failed to register interrupt\n");
2209 disable_irq(client
->irq
);
2211 error
= mxt_initialize(data
);
2215 error
= sysfs_create_group(&client
->dev
.kobj
, &mxt_attr_group
);
2217 dev_err(&client
->dev
, "Failure %d creating sysfs group\n",
2219 goto err_free_object
;
2225 mxt_free_input_device(data
);
2226 mxt_free_object_table(data
);
2228 free_irq(client
->irq
, data
);
2234 static int mxt_remove(struct i2c_client
*client
)
2236 struct mxt_data
*data
= i2c_get_clientdata(client
);
2238 sysfs_remove_group(&client
->dev
.kobj
, &mxt_attr_group
);
2239 free_irq(data
->irq
, data
);
2240 mxt_free_input_device(data
);
2241 mxt_free_object_table(data
);
2247 static int __maybe_unused
mxt_suspend(struct device
*dev
)
2249 struct i2c_client
*client
= to_i2c_client(dev
);
2250 struct mxt_data
*data
= i2c_get_clientdata(client
);
2251 struct input_dev
*input_dev
= data
->input_dev
;
2253 mutex_lock(&input_dev
->mutex
);
2255 if (input_dev
->users
)
2258 mutex_unlock(&input_dev
->mutex
);
2263 static int __maybe_unused
mxt_resume(struct device
*dev
)
2265 struct i2c_client
*client
= to_i2c_client(dev
);
2266 struct mxt_data
*data
= i2c_get_clientdata(client
);
2267 struct input_dev
*input_dev
= data
->input_dev
;
2269 mutex_lock(&input_dev
->mutex
);
2271 if (input_dev
->users
)
2274 mutex_unlock(&input_dev
->mutex
);
2279 static SIMPLE_DEV_PM_OPS(mxt_pm_ops
, mxt_suspend
, mxt_resume
);
2281 static const struct of_device_id mxt_of_match
[] = {
2282 { .compatible
= "atmel,maxtouch", },
2285 MODULE_DEVICE_TABLE(of
, mxt_of_match
);
2287 static const struct i2c_device_id mxt_id
[] = {
2288 { "qt602240_ts", 0 },
2289 { "atmel_mxt_ts", 0 },
2290 { "atmel_mxt_tp", 0 },
2294 MODULE_DEVICE_TABLE(i2c
, mxt_id
);
2296 static struct i2c_driver mxt_driver
= {
2298 .name
= "atmel_mxt_ts",
2299 .owner
= THIS_MODULE
,
2300 .of_match_table
= of_match_ptr(mxt_of_match
),
2304 .remove
= mxt_remove
,
2308 module_i2c_driver(mxt_driver
);
2310 /* Module information */
2311 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
2312 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
2313 MODULE_LICENSE("GPL");