kernel-fxtec-pro1x/drivers/input/mouse/elantech.h
Arjan Opmeer 3f8c0df43d Input: elantech - provide a workaround for jumpy cursor on firmware 2.34
It seems that Elantech touchpad firmware version 2.34 on the Hercules eCAFÉ
suffers from a problem where bogus coordinates get reported at the beginning
of a touch action. This causes the mouse cursor or the scrolled page to
jump.

Included patch provides a workaround that discards mouse packets that are
likely to contain bogus coordinates. The workaround is activated when we
detect touchpad with fimware version 2.34.

Signed-off-by: Arjan Opmeer <arjan@opmeer.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-04-18 19:11:51 -07:00

125 lines
3.1 KiB
C

/*
* Elantech Touchpad driver (v6)
*
* Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* Trademarks are the property of their respective owners.
*/
#ifndef _ELANTECH_H
#define _ELANTECH_H
/*
* Command values for Synaptics style queries
*/
#define ETP_FW_VERSION_QUERY 0x01
#define ETP_CAPABILITIES_QUERY 0x02
/*
* Command values for register reading or writing
*/
#define ETP_REGISTER_READ 0x10
#define ETP_REGISTER_WRITE 0x11
/*
* Hardware version 2 custom PS/2 command value
*/
#define ETP_PS2_CUSTOM_COMMAND 0xf8
/*
* Times to retry a ps2_command and millisecond delay between tries
*/
#define ETP_PS2_COMMAND_TRIES 3
#define ETP_PS2_COMMAND_DELAY 500
/*
* Times to try to read back a register and millisecond delay between tries
*/
#define ETP_READ_BACK_TRIES 5
#define ETP_READ_BACK_DELAY 2000
/*
* Register bitmasks for hardware version 1
*/
#define ETP_R10_ABSOLUTE_MODE 0x04
#define ETP_R11_4_BYTE_MODE 0x02
/*
* Capability bitmasks
*/
#define ETP_CAP_HAS_ROCKER 0x04
/*
* One hard to find application note states that X axis range is 0 to 576
* and Y axis range is 0 to 384 for harware version 1.
* Edge fuzz might be necessary because of bezel around the touchpad
*/
#define ETP_EDGE_FUZZ_V1 32
#define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
#define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1)
#define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
#define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1)
/*
* It seems the resolution for hardware version 2 doubled.
* Hence the X and Y ranges are doubled too.
* The bezel around the pad also appears to be smaller
*/
#define ETP_EDGE_FUZZ_V2 8
#define ETP_XMIN_V2 ( 0 + ETP_EDGE_FUZZ_V2)
#define ETP_XMAX_V2 (1152 - ETP_EDGE_FUZZ_V2)
#define ETP_YMIN_V2 ( 0 + ETP_EDGE_FUZZ_V2)
#define ETP_YMAX_V2 ( 768 - ETP_EDGE_FUZZ_V2)
/*
* For two finger touches the coordinate of each finger gets reported
* separately but with reduced resolution.
*/
#define ETP_2FT_FUZZ 4
#define ETP_2FT_XMIN ( 0 + ETP_2FT_FUZZ)
#define ETP_2FT_XMAX (288 - ETP_2FT_FUZZ)
#define ETP_2FT_YMIN ( 0 + ETP_2FT_FUZZ)
#define ETP_2FT_YMAX (192 - ETP_2FT_FUZZ)
struct elantech_data {
unsigned char reg_10;
unsigned char reg_11;
unsigned char reg_20;
unsigned char reg_21;
unsigned char reg_22;
unsigned char reg_23;
unsigned char reg_24;
unsigned char reg_25;
unsigned char reg_26;
unsigned char debug;
unsigned char capabilities;
unsigned char fw_version_maj;
unsigned char fw_version_min;
unsigned char hw_version;
unsigned char paritycheck;
unsigned char jumpy_cursor;
unsigned char parity[256];
};
#ifdef CONFIG_MOUSE_PS2_ELANTECH
int elantech_detect(struct psmouse *psmouse, int set_properties);
int elantech_init(struct psmouse *psmouse);
#else
static inline int elantech_detect(struct psmouse *psmouse, int set_properties)
{
return -ENOSYS;
}
static inline int elantech_init(struct psmouse *psmouse)
{
return -ENOSYS;
}
#endif /* CONFIG_MOUSE_PS2_ELANTECH */
#endif