Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 435915ea authored by Florian Echtler's avatar Florian Echtler Committed by Dmitry Torokhov
Browse files

Input: sur40 - add additional reverse-engineered information 



Due to recent reverse engineering efforts, a lot more information is now
available about the internals of the SUR40. We document this in the kernel
driver for future use.

Signed-off-by: default avatarMartin Kaltenbrunner <modin@yuri.at>
Signed-off-by: default avatarFlorian Echtler <floe@butterbrot.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 9e938dec

drivers/input/touchscreen/sur40.c

+12 −5
Original line number Diff line number Diff line
@@ -59,7 +59,7 @@ struct sur40_blob { 
	__le16 blob_id;



	u8 action;         /* 0x02 = enter/exit, 0x03 = update (?) */

	u8 unknown;        /* always 0x01 or 0x02 (no idea what this is?) */

	u8 type;           /* bitmask (0x01 blob,  0x02 touch, 0x04 tag) */



	__le16 bb_pos_x;   /* upper left corner of bounding box */

	__le16 bb_pos_y;
@@ -133,12 +133,19 @@ struct sur40_image_header { 


/* control commands */

#define SUR40_GET_VERSION 0xb0 /* 12 bytes string    */

#define SUR40_UNKNOWN1    0xb3 /*  5 bytes           */

#define SUR40_UNKNOWN2    0xc1 /* 24 bytes           */

#define SUR40_ACCEL_CAPS  0xb3 /*  5 bytes           */

#define SUR40_SENSOR_CAPS 0xc1 /* 24 bytes           */



#define SUR40_POKE        0xc5 /* poke register byte */

#define SUR40_PEEK        0xc4 /* 48 bytes registers */



#define SUR40_GET_STATE   0xc5 /*  4 bytes state (?) */

#define SUR40_GET_SENSORS 0xb1 /*  8 bytes sensors   */



#define SUR40_BLOB	0x01

#define SUR40_TOUCH	0x02

#define SUR40_TAG	0x04



static const struct v4l2_pix_format sur40_pix_format[] = {

	{

		.pixelformat = V4L2_TCH_FMT_TU08,
@@ -238,11 +245,11 @@ static int sur40_init(struct sur40_state *dev) 
	if (result < 0)

		goto error;



	result = sur40_command(dev, SUR40_UNKNOWN2,    0x00, buffer, 24);

	result = sur40_command(dev, SUR40_SENSOR_CAPS, 0x00, buffer, 24);

	if (result < 0)

		goto error;



	result = sur40_command(dev, SUR40_UNKNOWN1,    0x00, buffer,  5);

	result = sur40_command(dev, SUR40_ACCEL_CAPS, 0x00, buffer, 5);

	if (result < 0)

		goto error;