2 * Atmel maXTouch Touchscreen driver
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/firmware.h>
18 #include <linux/i2c.h>
19 #include <linux/i2c/atmel_mxt_ts.h>
20 #include <linux/input.h>
21 #include <linux/interrupt.h>
22 #include <linux/slab.h>
30 #define MXT_APP_LOW 0x4a
31 #define MXT_APP_HIGH 0x4b
32 #define MXT_BOOT_LOW 0x24
33 #define MXT_BOOT_HIGH 0x25
36 #define MXT_FW_NAME "maxtouch.fw"
39 #define MXT_FAMILY_ID 0x00
40 #define MXT_VARIANT_ID 0x01
41 #define MXT_VERSION 0x02
42 #define MXT_BUILD 0x03
43 #define MXT_MATRIX_X_SIZE 0x04
44 #define MXT_MATRIX_Y_SIZE 0x05
45 #define MXT_OBJECT_NUM 0x06
46 #define MXT_OBJECT_START 0x07
48 #define MXT_OBJECT_SIZE 6
51 #define MXT_DEBUG_DIAGNOSTIC 37
52 #define MXT_GEN_MESSAGE 5
53 #define MXT_GEN_COMMAND 6
54 #define MXT_GEN_POWER 7
55 #define MXT_GEN_ACQUIRE 8
56 #define MXT_TOUCH_MULTI 9
57 #define MXT_TOUCH_KEYARRAY 15
58 #define MXT_TOUCH_PROXIMITY 23
59 #define MXT_PROCI_GRIPFACE 20
60 #define MXT_PROCG_NOISE 22
61 #define MXT_PROCI_ONETOUCH 24
62 #define MXT_PROCI_TWOTOUCH 27
63 #define MXT_SPT_COMMSCONFIG 18
64 #define MXT_SPT_GPIOPWM 19
65 #define MXT_SPT_SELFTEST 25
66 #define MXT_SPT_CTECONFIG 28
67 #define MXT_SPT_USERDATA 38
69 /* MXT_GEN_COMMAND field */
70 #define MXT_COMMAND_RESET 0
71 #define MXT_COMMAND_BACKUPNV 1
72 #define MXT_COMMAND_CALIBRATE 2
73 #define MXT_COMMAND_REPORTALL 3
74 #define MXT_COMMAND_DIAGNOSTIC 5
76 /* MXT_GEN_POWER field */
77 #define MXT_POWER_IDLEACQINT 0
78 #define MXT_POWER_ACTVACQINT 1
79 #define MXT_POWER_ACTV2IDLETO 2
81 /* MXT_GEN_ACQUIRE field */
82 #define MXT_ACQUIRE_CHRGTIME 0
83 #define MXT_ACQUIRE_TCHDRIFT 2
84 #define MXT_ACQUIRE_DRIFTST 3
85 #define MXT_ACQUIRE_TCHAUTOCAL 4
86 #define MXT_ACQUIRE_SYNC 5
87 #define MXT_ACQUIRE_ATCHCALST 6
88 #define MXT_ACQUIRE_ATCHCALSTHR 7
90 /* MXT_TOUCH_MULTI field */
91 #define MXT_TOUCH_CTRL 0
92 #define MXT_TOUCH_XORIGIN 1
93 #define MXT_TOUCH_YORIGIN 2
94 #define MXT_TOUCH_XSIZE 3
95 #define MXT_TOUCH_YSIZE 4
96 #define MXT_TOUCH_BLEN 6
97 #define MXT_TOUCH_TCHTHR 7
98 #define MXT_TOUCH_TCHDI 8
99 #define MXT_TOUCH_ORIENT 9
100 #define MXT_TOUCH_MOVHYSTI 11
101 #define MXT_TOUCH_MOVHYSTN 12
102 #define MXT_TOUCH_NUMTOUCH 14
103 #define MXT_TOUCH_MRGHYST 15
104 #define MXT_TOUCH_MRGTHR 16
105 #define MXT_TOUCH_AMPHYST 17
106 #define MXT_TOUCH_XRANGE_LSB 18
107 #define MXT_TOUCH_XRANGE_MSB 19
108 #define MXT_TOUCH_YRANGE_LSB 20
109 #define MXT_TOUCH_YRANGE_MSB 21
110 #define MXT_TOUCH_XLOCLIP 22
111 #define MXT_TOUCH_XHICLIP 23
112 #define MXT_TOUCH_YLOCLIP 24
113 #define MXT_TOUCH_YHICLIP 25
114 #define MXT_TOUCH_XEDGECTRL 26
115 #define MXT_TOUCH_XEDGEDIST 27
116 #define MXT_TOUCH_YEDGECTRL 28
117 #define MXT_TOUCH_YEDGEDIST 29
118 #define MXT_TOUCH_JUMPLIMIT 30
120 /* MXT_PROCI_GRIPFACE field */
121 #define MXT_GRIPFACE_CTRL 0
122 #define MXT_GRIPFACE_XLOGRIP 1
123 #define MXT_GRIPFACE_XHIGRIP 2
124 #define MXT_GRIPFACE_YLOGRIP 3
125 #define MXT_GRIPFACE_YHIGRIP 4
126 #define MXT_GRIPFACE_MAXTCHS 5
127 #define MXT_GRIPFACE_SZTHR1 7
128 #define MXT_GRIPFACE_SZTHR2 8
129 #define MXT_GRIPFACE_SHPTHR1 9
130 #define MXT_GRIPFACE_SHPTHR2 10
131 #define MXT_GRIPFACE_SUPEXTTO 11
133 /* MXT_PROCI_NOISE field */
134 #define MXT_NOISE_CTRL 0
135 #define MXT_NOISE_OUTFLEN 1
136 #define MXT_NOISE_GCAFUL_LSB 3
137 #define MXT_NOISE_GCAFUL_MSB 4
138 #define MXT_NOISE_GCAFLL_LSB 5
139 #define MXT_NOISE_GCAFLL_MSB 6
140 #define MXT_NOISE_ACTVGCAFVALID 7
141 #define MXT_NOISE_NOISETHR 8
142 #define MXT_NOISE_FREQHOPSCALE 10
143 #define MXT_NOISE_FREQ0 11
144 #define MXT_NOISE_FREQ1 12
145 #define MXT_NOISE_FREQ2 13
146 #define MXT_NOISE_FREQ3 14
147 #define MXT_NOISE_FREQ4 15
148 #define MXT_NOISE_IDLEGCAFVALID 16
150 /* MXT_SPT_COMMSCONFIG */
151 #define MXT_COMMS_CTRL 0
152 #define MXT_COMMS_CMD 1
154 /* MXT_SPT_CTECONFIG field */
155 #define MXT_CTE_CTRL 0
156 #define MXT_CTE_CMD 1
157 #define MXT_CTE_MODE 2
158 #define MXT_CTE_IDLEGCAFDEPTH 3
159 #define MXT_CTE_ACTVGCAFDEPTH 4
160 #define MXT_CTE_VOLTAGE 5
162 #define MXT_VOLTAGE_DEFAULT 2700000
163 #define MXT_VOLTAGE_STEP 10000
165 /* Define for MXT_GEN_COMMAND */
166 #define MXT_BOOT_VALUE 0xa5
167 #define MXT_BACKUP_VALUE 0x55
168 #define MXT_BACKUP_TIME 25 /* msec */
169 #define MXT_RESET_TIME 65 /* msec */
171 #define MXT_FWRESET_TIME 175 /* msec */
173 /* Command to unlock bootloader */
174 #define MXT_UNLOCK_CMD_MSB 0xaa
175 #define MXT_UNLOCK_CMD_LSB 0xdc
177 /* Bootloader mode status */
178 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
179 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
180 #define MXT_FRAME_CRC_CHECK 0x02
181 #define MXT_FRAME_CRC_FAIL 0x03
182 #define MXT_FRAME_CRC_PASS 0x04
183 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
184 #define MXT_BOOT_STATUS_MASK 0x3f
187 #define MXT_SUPPRESS (1 << 1)
188 #define MXT_AMP (1 << 2)
189 #define MXT_VECTOR (1 << 3)
190 #define MXT_MOVE (1 << 4)
191 #define MXT_RELEASE (1 << 5)
192 #define MXT_PRESS (1 << 6)
193 #define MXT_DETECT (1 << 7)
195 /* Touchscreen absolute values */
196 #define MXT_MAX_XC 0x3ff
197 #define MXT_MAX_YC 0x3ff
198 #define MXT_MAX_AREA 0xff
200 #define MXT_MAX_FINGER 10
219 /* to map object and message */
236 /* Each client has this additional data */
238 struct i2c_client
*client
;
239 struct input_dev
*input_dev
;
240 const struct mxt_platform_data
*pdata
;
241 struct mxt_object
*object_table
;
242 struct mxt_info info
;
243 struct mxt_finger finger
[MXT_MAX_FINGER
];
247 static bool mxt_object_readable(unsigned int type
)
250 case MXT_GEN_MESSAGE
:
251 case MXT_GEN_COMMAND
:
253 case MXT_GEN_ACQUIRE
:
254 case MXT_TOUCH_MULTI
:
255 case MXT_TOUCH_KEYARRAY
:
256 case MXT_TOUCH_PROXIMITY
:
257 case MXT_PROCI_GRIPFACE
:
258 case MXT_PROCG_NOISE
:
259 case MXT_PROCI_ONETOUCH
:
260 case MXT_PROCI_TWOTOUCH
:
261 case MXT_SPT_COMMSCONFIG
:
262 case MXT_SPT_GPIOPWM
:
263 case MXT_SPT_SELFTEST
:
264 case MXT_SPT_CTECONFIG
:
265 case MXT_SPT_USERDATA
:
272 static bool mxt_object_writable(unsigned int type
)
275 case MXT_GEN_COMMAND
:
277 case MXT_GEN_ACQUIRE
:
278 case MXT_TOUCH_MULTI
:
279 case MXT_TOUCH_KEYARRAY
:
280 case MXT_TOUCH_PROXIMITY
:
281 case MXT_PROCI_GRIPFACE
:
282 case MXT_PROCG_NOISE
:
283 case MXT_PROCI_ONETOUCH
:
284 case MXT_PROCI_TWOTOUCH
:
285 case MXT_SPT_GPIOPWM
:
286 case MXT_SPT_SELFTEST
:
287 case MXT_SPT_CTECONFIG
:
294 static void mxt_dump_message(struct device
*dev
,
295 struct mxt_message
*message
)
297 dev_dbg(dev
, "reportid:\t0x%x\n", message
->reportid
);
298 dev_dbg(dev
, "message1:\t0x%x\n", message
->message
[0]);
299 dev_dbg(dev
, "message2:\t0x%x\n", message
->message
[1]);
300 dev_dbg(dev
, "message3:\t0x%x\n", message
->message
[2]);
301 dev_dbg(dev
, "message4:\t0x%x\n", message
->message
[3]);
302 dev_dbg(dev
, "message5:\t0x%x\n", message
->message
[4]);
303 dev_dbg(dev
, "message6:\t0x%x\n", message
->message
[5]);
304 dev_dbg(dev
, "message7:\t0x%x\n", message
->message
[6]);
305 dev_dbg(dev
, "checksum:\t0x%x\n", message
->checksum
);
308 static int mxt_check_bootloader(struct i2c_client
*client
,
314 if (i2c_master_recv(client
, &val
, 1) != 1) {
315 dev_err(&client
->dev
, "%s: i2c recv failed\n", __func__
);
320 case MXT_WAITING_BOOTLOAD_CMD
:
321 case MXT_WAITING_FRAME_DATA
:
322 val
&= ~MXT_BOOT_STATUS_MASK
;
324 case MXT_FRAME_CRC_PASS
:
325 if (val
== MXT_FRAME_CRC_CHECK
)
333 dev_err(&client
->dev
, "Unvalid bootloader mode state\n");
340 static int mxt_unlock_bootloader(struct i2c_client
*client
)
344 buf
[0] = MXT_UNLOCK_CMD_LSB
;
345 buf
[1] = MXT_UNLOCK_CMD_MSB
;
347 if (i2c_master_send(client
, buf
, 2) != 2) {
348 dev_err(&client
->dev
, "%s: i2c send failed\n", __func__
);
355 static int mxt_fw_write(struct i2c_client
*client
,
356 const u8
*data
, unsigned int frame_size
)
358 if (i2c_master_send(client
, data
, frame_size
) != frame_size
) {
359 dev_err(&client
->dev
, "%s: i2c send failed\n", __func__
);
366 static int __mxt_read_reg(struct i2c_client
*client
,
367 u16 reg
, u16 len
, void *val
)
369 struct i2c_msg xfer
[2];
373 buf
[1] = (reg
>> 8) & 0xff;
376 xfer
[0].addr
= client
->addr
;
382 xfer
[1].addr
= client
->addr
;
383 xfer
[1].flags
= I2C_M_RD
;
387 if (i2c_transfer(client
->adapter
, xfer
, 2) != 2) {
388 dev_err(&client
->dev
, "%s: i2c transfer failed\n", __func__
);
395 static int mxt_read_reg(struct i2c_client
*client
, u16 reg
, u8
*val
)
397 return __mxt_read_reg(client
, reg
, 1, val
);
400 static int mxt_write_reg(struct i2c_client
*client
, u16 reg
, u8 val
)
405 buf
[1] = (reg
>> 8) & 0xff;
408 if (i2c_master_send(client
, buf
, 3) != 3) {
409 dev_err(&client
->dev
, "%s: i2c send failed\n", __func__
);
416 static int mxt_read_object_table(struct i2c_client
*client
,
417 u16 reg
, u8
*object_buf
)
419 return __mxt_read_reg(client
, reg
, MXT_OBJECT_SIZE
,
423 static struct mxt_object
*
424 mxt_get_object(struct mxt_data
*data
, u8 type
)
426 struct mxt_object
*object
;
429 for (i
= 0; i
< data
->info
.object_num
; i
++) {
430 object
= data
->object_table
+ i
;
431 if (object
->type
== type
)
435 dev_err(&data
->client
->dev
, "Invalid object type\n");
439 static int mxt_read_message(struct mxt_data
*data
,
440 struct mxt_message
*message
)
442 struct mxt_object
*object
;
445 object
= mxt_get_object(data
, MXT_GEN_MESSAGE
);
449 reg
= object
->start_address
;
450 return __mxt_read_reg(data
->client
, reg
,
451 sizeof(struct mxt_message
), message
);
454 static int mxt_read_object(struct mxt_data
*data
,
455 u8 type
, u8 offset
, u8
*val
)
457 struct mxt_object
*object
;
460 object
= mxt_get_object(data
, type
);
464 reg
= object
->start_address
;
465 return __mxt_read_reg(data
->client
, reg
+ offset
, 1, val
);
468 static int mxt_write_object(struct mxt_data
*data
,
469 u8 type
, u8 offset
, u8 val
)
471 struct mxt_object
*object
;
474 object
= mxt_get_object(data
, type
);
478 reg
= object
->start_address
;
479 return mxt_write_reg(data
->client
, reg
+ offset
, val
);
482 static void mxt_input_report(struct mxt_data
*data
, int single_id
)
484 struct mxt_finger
*finger
= data
->finger
;
485 struct input_dev
*input_dev
= data
->input_dev
;
486 int status
= finger
[single_id
].status
;
490 for (id
= 0; id
< MXT_MAX_FINGER
; id
++) {
491 if (!finger
[id
].status
)
494 input_report_abs(input_dev
, ABS_MT_TOUCH_MAJOR
,
495 finger
[id
].status
!= MXT_RELEASE
?
496 finger
[id
].area
: 0);
497 input_report_abs(input_dev
, ABS_MT_POSITION_X
,
499 input_report_abs(input_dev
, ABS_MT_POSITION_Y
,
501 input_mt_sync(input_dev
);
503 if (finger
[id
].status
== MXT_RELEASE
)
504 finger
[id
].status
= 0;
509 input_report_key(input_dev
, BTN_TOUCH
, finger_num
> 0);
511 if (status
!= MXT_RELEASE
) {
512 input_report_abs(input_dev
, ABS_X
, finger
[single_id
].x
);
513 input_report_abs(input_dev
, ABS_Y
, finger
[single_id
].y
);
516 input_sync(input_dev
);
519 static void mxt_input_touchevent(struct mxt_data
*data
,
520 struct mxt_message
*message
, int id
)
522 struct mxt_finger
*finger
= data
->finger
;
523 struct device
*dev
= &data
->client
->dev
;
524 u8 status
= message
->message
[0];
529 /* Check the touch is present on the screen */
530 if (!(status
& MXT_DETECT
)) {
531 if (status
& MXT_RELEASE
) {
532 dev_dbg(dev
, "[%d] released\n", id
);
534 finger
[id
].status
= MXT_RELEASE
;
535 mxt_input_report(data
, id
);
540 /* Check only AMP detection */
541 if (!(status
& (MXT_PRESS
| MXT_MOVE
)))
544 x
= (message
->message
[1] << 2) | ((message
->message
[3] & ~0x3f) >> 6);
545 y
= (message
->message
[2] << 2) | ((message
->message
[3] & ~0xf3) >> 2);
546 area
= message
->message
[4];
548 dev_dbg(dev
, "[%d] %s x: %d, y: %d, area: %d\n", id
,
549 status
& MXT_MOVE
? "moved" : "pressed",
552 finger
[id
].status
= status
& MXT_MOVE
?
553 MXT_MOVE
: MXT_PRESS
;
556 finger
[id
].area
= area
;
558 mxt_input_report(data
, id
);
561 static irqreturn_t
mxt_interrupt(int irq
, void *dev_id
)
563 struct mxt_data
*data
= dev_id
;
564 struct mxt_message message
;
565 struct mxt_object
*object
;
566 struct device
*dev
= &data
->client
->dev
;
573 if (mxt_read_message(data
, &message
)) {
574 dev_err(dev
, "Failed to read message\n");
578 reportid
= message
.reportid
;
580 /* whether reportid is thing of MXT_TOUCH_MULTI */
581 object
= mxt_get_object(data
, MXT_TOUCH_MULTI
);
585 max_reportid
= object
->max_reportid
;
586 min_reportid
= max_reportid
- object
->num_report_ids
+ 1;
587 id
= reportid
- min_reportid
;
589 if (reportid
>= min_reportid
&& reportid
<= max_reportid
)
590 mxt_input_touchevent(data
, &message
, id
);
592 mxt_dump_message(dev
, &message
);
593 } while (reportid
!= 0xff);
599 static int mxt_check_reg_init(struct mxt_data
*data
)
601 const struct mxt_platform_data
*pdata
= data
->pdata
;
602 struct mxt_object
*object
;
603 struct device
*dev
= &data
->client
->dev
;
605 int i
, j
, config_offset
;
607 if (!pdata
->config
) {
608 dev_dbg(dev
, "No cfg data defined, skipping reg init\n");
612 for (i
= 0; i
< data
->info
.object_num
; i
++) {
613 object
= data
->object_table
+ i
;
615 if (!mxt_object_writable(object
->type
))
618 for (j
= 0; j
< object
->size
+ 1; j
++) {
619 config_offset
= index
+ j
;
620 if (config_offset
> pdata
->config_length
) {
621 dev_err(dev
, "Not enough config data!\n");
624 mxt_write_object(data
, object
->type
, j
,
625 pdata
->config
[config_offset
]);
627 index
+= object
->size
+ 1;
633 static int mxt_make_highchg(struct mxt_data
*data
)
635 struct device
*dev
= &data
->client
->dev
;
636 struct mxt_message message
;
640 /* Read dummy message to make high CHG pin */
642 error
= mxt_read_message(data
, &message
);
645 } while (message
.reportid
!= 0xff && --count
);
648 dev_err(dev
, "CHG pin isn't cleared\n");
655 static void mxt_handle_pdata(struct mxt_data
*data
)
657 const struct mxt_platform_data
*pdata
= data
->pdata
;
660 /* Set touchscreen lines */
661 mxt_write_object(data
, MXT_TOUCH_MULTI
, MXT_TOUCH_XSIZE
,
663 mxt_write_object(data
, MXT_TOUCH_MULTI
, MXT_TOUCH_YSIZE
,
666 /* Set touchscreen orient */
667 mxt_write_object(data
, MXT_TOUCH_MULTI
, MXT_TOUCH_ORIENT
,
670 /* Set touchscreen burst length */
671 mxt_write_object(data
, MXT_TOUCH_MULTI
,
672 MXT_TOUCH_BLEN
, pdata
->blen
);
674 /* Set touchscreen threshold */
675 mxt_write_object(data
, MXT_TOUCH_MULTI
,
676 MXT_TOUCH_TCHTHR
, pdata
->threshold
);
678 /* Set touchscreen resolution */
679 mxt_write_object(data
, MXT_TOUCH_MULTI
,
680 MXT_TOUCH_XRANGE_LSB
, (pdata
->x_size
- 1) & 0xff);
681 mxt_write_object(data
, MXT_TOUCH_MULTI
,
682 MXT_TOUCH_XRANGE_MSB
, (pdata
->x_size
- 1) >> 8);
683 mxt_write_object(data
, MXT_TOUCH_MULTI
,
684 MXT_TOUCH_YRANGE_LSB
, (pdata
->y_size
- 1) & 0xff);
685 mxt_write_object(data
, MXT_TOUCH_MULTI
,
686 MXT_TOUCH_YRANGE_MSB
, (pdata
->y_size
- 1) >> 8);
688 /* Set touchscreen voltage */
689 if (pdata
->voltage
) {
690 if (pdata
->voltage
< MXT_VOLTAGE_DEFAULT
) {
691 voltage
= (MXT_VOLTAGE_DEFAULT
- pdata
->voltage
) /
693 voltage
= 0xff - voltage
+ 1;
695 voltage
= (pdata
->voltage
- MXT_VOLTAGE_DEFAULT
) /
698 mxt_write_object(data
, MXT_SPT_CTECONFIG
,
699 MXT_CTE_VOLTAGE
, voltage
);
703 static int mxt_get_info(struct mxt_data
*data
)
705 struct i2c_client
*client
= data
->client
;
706 struct mxt_info
*info
= &data
->info
;
710 error
= mxt_read_reg(client
, MXT_FAMILY_ID
, &val
);
713 info
->family_id
= val
;
715 error
= mxt_read_reg(client
, MXT_VARIANT_ID
, &val
);
718 info
->variant_id
= val
;
720 error
= mxt_read_reg(client
, MXT_VERSION
, &val
);
725 error
= mxt_read_reg(client
, MXT_BUILD
, &val
);
730 error
= mxt_read_reg(client
, MXT_OBJECT_NUM
, &val
);
733 info
->object_num
= val
;
738 static int mxt_get_object_table(struct mxt_data
*data
)
744 u8 buf
[MXT_OBJECT_SIZE
];
746 for (i
= 0; i
< data
->info
.object_num
; i
++) {
747 struct mxt_object
*object
= data
->object_table
+ i
;
749 reg
= MXT_OBJECT_START
+ MXT_OBJECT_SIZE
* i
;
750 error
= mxt_read_object_table(data
->client
, reg
, buf
);
754 object
->type
= buf
[0];
755 object
->start_address
= (buf
[2] << 8) | buf
[1];
756 object
->size
= buf
[3];
757 object
->instances
= buf
[4];
758 object
->num_report_ids
= buf
[5];
760 if (object
->num_report_ids
) {
761 reportid
+= object
->num_report_ids
*
762 (object
->instances
+ 1);
763 object
->max_reportid
= reportid
;
770 static int mxt_initialize(struct mxt_data
*data
)
772 struct i2c_client
*client
= data
->client
;
773 struct mxt_info
*info
= &data
->info
;
777 error
= mxt_get_info(data
);
781 data
->object_table
= kcalloc(info
->object_num
,
782 sizeof(struct mxt_object
),
784 if (!data
->object_table
) {
785 dev_err(&client
->dev
, "Failed to allocate memory\n");
789 /* Get object table information */
790 error
= mxt_get_object_table(data
);
794 /* Check register init values */
795 error
= mxt_check_reg_init(data
);
799 error
= mxt_make_highchg(data
);
803 mxt_handle_pdata(data
);
805 /* Backup to memory */
806 mxt_write_object(data
, MXT_GEN_COMMAND
,
807 MXT_COMMAND_BACKUPNV
,
809 msleep(MXT_BACKUP_TIME
);
812 mxt_write_object(data
, MXT_GEN_COMMAND
,
813 MXT_COMMAND_RESET
, 1);
814 msleep(MXT_RESET_TIME
);
816 /* Update matrix size at info struct */
817 error
= mxt_read_reg(client
, MXT_MATRIX_X_SIZE
, &val
);
820 info
->matrix_xsize
= val
;
822 error
= mxt_read_reg(client
, MXT_MATRIX_Y_SIZE
, &val
);
825 info
->matrix_ysize
= val
;
827 dev_info(&client
->dev
,
828 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
829 info
->family_id
, info
->variant_id
, info
->version
,
832 dev_info(&client
->dev
,
833 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
834 info
->matrix_xsize
, info
->matrix_ysize
,
840 static ssize_t
mxt_object_show(struct device
*dev
,
841 struct device_attribute
*attr
, char *buf
)
843 struct mxt_data
*data
= dev_get_drvdata(dev
);
844 struct mxt_object
*object
;
850 for (i
= 0; i
< data
->info
.object_num
; i
++) {
851 object
= data
->object_table
+ i
;
853 count
+= sprintf(buf
+ count
,
854 "Object Table Element %d(Type %d)\n",
855 i
+ 1, object
->type
);
857 if (!mxt_object_readable(object
->type
)) {
858 count
+= sprintf(buf
+ count
, "\n");
862 for (j
= 0; j
< object
->size
+ 1; j
++) {
863 error
= mxt_read_object(data
,
864 object
->type
, j
, &val
);
868 count
+= sprintf(buf
+ count
,
869 " Byte %d: 0x%x (%d)\n", j
, val
, val
);
872 count
+= sprintf(buf
+ count
, "\n");
878 static int mxt_load_fw(struct device
*dev
, const char *fn
)
880 struct mxt_data
*data
= dev_get_drvdata(dev
);
881 struct i2c_client
*client
= data
->client
;
882 const struct firmware
*fw
= NULL
;
883 unsigned int frame_size
;
884 unsigned int pos
= 0;
887 ret
= request_firmware(&fw
, fn
, dev
);
889 dev_err(dev
, "Unable to open firmware %s\n", fn
);
893 /* Change to the bootloader mode */
894 mxt_write_object(data
, MXT_GEN_COMMAND
,
895 MXT_COMMAND_RESET
, MXT_BOOT_VALUE
);
896 msleep(MXT_RESET_TIME
);
898 /* Change to slave address of bootloader */
899 if (client
->addr
== MXT_APP_LOW
)
900 client
->addr
= MXT_BOOT_LOW
;
902 client
->addr
= MXT_BOOT_HIGH
;
904 ret
= mxt_check_bootloader(client
, MXT_WAITING_BOOTLOAD_CMD
);
908 /* Unlock bootloader */
909 mxt_unlock_bootloader(client
);
911 while (pos
< fw
->size
) {
912 ret
= mxt_check_bootloader(client
,
913 MXT_WAITING_FRAME_DATA
);
917 frame_size
= ((*(fw
->data
+ pos
) << 8) | *(fw
->data
+ pos
+ 1));
919 /* We should add 2 at frame size as the the firmware data is not
920 * included the CRC bytes.
924 /* Write one frame to device */
925 mxt_fw_write(client
, fw
->data
+ pos
, frame_size
);
927 ret
= mxt_check_bootloader(client
,
934 dev_dbg(dev
, "Updated %d bytes / %zd bytes\n", pos
, fw
->size
);
938 release_firmware(fw
);
940 /* Change to slave address of application */
941 if (client
->addr
== MXT_BOOT_LOW
)
942 client
->addr
= MXT_APP_LOW
;
944 client
->addr
= MXT_APP_HIGH
;
949 static ssize_t
mxt_update_fw_store(struct device
*dev
,
950 struct device_attribute
*attr
,
951 const char *buf
, size_t count
)
953 struct mxt_data
*data
= dev_get_drvdata(dev
);
956 disable_irq(data
->irq
);
958 error
= mxt_load_fw(dev
, MXT_FW_NAME
);
960 dev_err(dev
, "The firmware update failed(%d)\n", error
);
963 dev_dbg(dev
, "The firmware update succeeded\n");
966 msleep(MXT_FWRESET_TIME
);
968 kfree(data
->object_table
);
969 data
->object_table
= NULL
;
971 mxt_initialize(data
);
974 enable_irq(data
->irq
);
979 static DEVICE_ATTR(object
, 0444, mxt_object_show
, NULL
);
980 static DEVICE_ATTR(update_fw
, 0664, NULL
, mxt_update_fw_store
);
982 static struct attribute
*mxt_attrs
[] = {
983 &dev_attr_object
.attr
,
984 &dev_attr_update_fw
.attr
,
988 static const struct attribute_group mxt_attr_group
= {
992 static void mxt_start(struct mxt_data
*data
)
995 mxt_write_object(data
,
996 MXT_TOUCH_MULTI
, MXT_TOUCH_CTRL
, 0x83);
999 static void mxt_stop(struct mxt_data
*data
)
1002 mxt_write_object(data
,
1003 MXT_TOUCH_MULTI
, MXT_TOUCH_CTRL
, 0);
1006 static int mxt_input_open(struct input_dev
*dev
)
1008 struct mxt_data
*data
= input_get_drvdata(dev
);
1015 static void mxt_input_close(struct input_dev
*dev
)
1017 struct mxt_data
*data
= input_get_drvdata(dev
);
1022 static int __devinit
mxt_probe(struct i2c_client
*client
,
1023 const struct i2c_device_id
*id
)
1025 const struct mxt_platform_data
*pdata
= client
->dev
.platform_data
;
1026 struct mxt_data
*data
;
1027 struct input_dev
*input_dev
;
1033 data
= kzalloc(sizeof(struct mxt_data
), GFP_KERNEL
);
1034 input_dev
= input_allocate_device();
1035 if (!data
|| !input_dev
) {
1036 dev_err(&client
->dev
, "Failed to allocate memory\n");
1041 input_dev
->name
= "Atmel maXTouch Touchscreen";
1042 input_dev
->id
.bustype
= BUS_I2C
;
1043 input_dev
->dev
.parent
= &client
->dev
;
1044 input_dev
->open
= mxt_input_open
;
1045 input_dev
->close
= mxt_input_close
;
1047 __set_bit(EV_ABS
, input_dev
->evbit
);
1048 __set_bit(EV_KEY
, input_dev
->evbit
);
1049 __set_bit(BTN_TOUCH
, input_dev
->keybit
);
1051 /* For single touch */
1052 input_set_abs_params(input_dev
, ABS_X
,
1053 0, MXT_MAX_XC
, 0, 0);
1054 input_set_abs_params(input_dev
, ABS_Y
,
1055 0, MXT_MAX_YC
, 0, 0);
1057 /* For multi touch */
1058 input_set_abs_params(input_dev
, ABS_MT_TOUCH_MAJOR
,
1059 0, MXT_MAX_AREA
, 0, 0);
1060 input_set_abs_params(input_dev
, ABS_MT_POSITION_X
,
1061 0, MXT_MAX_XC
, 0, 0);
1062 input_set_abs_params(input_dev
, ABS_MT_POSITION_Y
,
1063 0, MXT_MAX_YC
, 0, 0);
1065 input_set_drvdata(input_dev
, data
);
1067 data
->client
= client
;
1068 data
->input_dev
= input_dev
;
1069 data
->pdata
= pdata
;
1070 data
->irq
= client
->irq
;
1072 i2c_set_clientdata(client
, data
);
1074 error
= mxt_initialize(data
);
1076 goto err_free_object
;
1078 error
= request_threaded_irq(client
->irq
, NULL
, mxt_interrupt
,
1079 pdata
->irqflags
, client
->dev
.driver
->name
, data
);
1081 dev_err(&client
->dev
, "Failed to register interrupt\n");
1082 goto err_free_object
;
1085 error
= input_register_device(input_dev
);
1089 error
= sysfs_create_group(&client
->dev
.kobj
, &mxt_attr_group
);
1091 goto err_unregister_device
;
1095 err_unregister_device
:
1096 input_unregister_device(input_dev
);
1099 free_irq(client
->irq
, data
);
1101 kfree(data
->object_table
);
1103 input_free_device(input_dev
);
1108 static int __devexit
mxt_remove(struct i2c_client
*client
)
1110 struct mxt_data
*data
= i2c_get_clientdata(client
);
1112 sysfs_remove_group(&client
->dev
.kobj
, &mxt_attr_group
);
1113 free_irq(data
->irq
, data
);
1114 input_unregister_device(data
->input_dev
);
1115 kfree(data
->object_table
);
1122 static int mxt_suspend(struct device
*dev
)
1124 struct i2c_client
*client
= to_i2c_client(dev
);
1125 struct mxt_data
*data
= i2c_get_clientdata(client
);
1126 struct input_dev
*input_dev
= data
->input_dev
;
1128 mutex_lock(&input_dev
->mutex
);
1130 if (input_dev
->users
)
1133 mutex_unlock(&input_dev
->mutex
);
1138 static int mxt_resume(struct device
*dev
)
1140 struct i2c_client
*client
= to_i2c_client(dev
);
1141 struct mxt_data
*data
= i2c_get_clientdata(client
);
1142 struct input_dev
*input_dev
= data
->input_dev
;
1145 mxt_write_object(data
, MXT_GEN_COMMAND
,
1146 MXT_COMMAND_RESET
, 1);
1148 msleep(MXT_RESET_TIME
);
1150 mutex_lock(&input_dev
->mutex
);
1152 if (input_dev
->users
)
1155 mutex_unlock(&input_dev
->mutex
);
1160 static const struct dev_pm_ops mxt_pm_ops
= {
1161 .suspend
= mxt_suspend
,
1162 .resume
= mxt_resume
,
1166 static const struct i2c_device_id mxt_id
[] = {
1167 { "qt602240_ts", 0 },
1168 { "atmel_mxt_ts", 0 },
1172 MODULE_DEVICE_TABLE(i2c
, mxt_id
);
1174 static struct i2c_driver mxt_driver
= {
1176 .name
= "atmel_mxt_ts",
1177 .owner
= THIS_MODULE
,
1183 .remove
= __devexit_p(mxt_remove
),
1187 static int __init
mxt_init(void)
1189 return i2c_add_driver(&mxt_driver
);
1192 static void __exit
mxt_exit(void)
1194 i2c_del_driver(&mxt_driver
);
1197 module_init(mxt_init
);
1198 module_exit(mxt_exit
);
1200 /* Module information */
1201 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1202 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1203 MODULE_LICENSE("GPL");