LXR linux/drivers/input/mouse/elantech.h

   1/*
   2 * Elantech Touchpad driver (v6)
   3 *
   4 * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms of the GNU General Public License version 2 as published
   8 * by the Free Software Foundation.
   9 *
  10 * Trademarks are the property of their respective owners.
  11 */
  12
  13#ifndef _ELANTECH_H
  14#define _ELANTECH_H
  15
  16/*
  17 * Command values for Synaptics style queries
  18 */
  19#define ETP_FW_VERSION_QUERY            0x01
  20#define ETP_CAPABILITIES_QUERY          0x02
  21
  22/*
  23 * Command values for register reading or writing
  24 */
  25#define ETP_REGISTER_READ               0x10
  26#define ETP_REGISTER_WRITE              0x11
  27
  28/*
  29 * Hardware version 2 custom PS/2 command value
  30 */
  31#define ETP_PS2_CUSTOM_COMMAND          0xf8
  32
  33/*
  34 * Times to retry a ps2_command and millisecond delay between tries
  35 */
  36#define ETP_PS2_COMMAND_TRIES           3
  37#define ETP_PS2_COMMAND_DELAY           500
  38
  39/*
  40 * Times to try to read back a register and millisecond delay between tries
  41 */
  42#define ETP_READ_BACK_TRIES             5
  43#define ETP_READ_BACK_DELAY             2000
  44
  45/*
  46 * Register bitmasks for hardware version 1
  47 */
  48#define ETP_R10_ABSOLUTE_MODE           0x04
  49#define ETP_R11_4_BYTE_MODE             0x02
  50
  51/*
  52 * Capability bitmasks
  53 */
  54#define ETP_CAP_HAS_ROCKER              0x04
  55
  56/*
  57 * One hard to find application note states that X axis range is 0 to 576
  58 * and Y axis range is 0 to 384 for harware version 1.
  59 * Edge fuzz might be necessary because of bezel around the touchpad
  60 */
  61#define ETP_EDGE_FUZZ_V1                32
  62
  63#define ETP_XMIN_V1                     (  0 + ETP_EDGE_FUZZ_V1)
  64#define ETP_XMAX_V1                     (576 - ETP_EDGE_FUZZ_V1)
  65#define ETP_YMIN_V1                     (  0 + ETP_EDGE_FUZZ_V1)
  66#define ETP_YMAX_V1                     (384 - ETP_EDGE_FUZZ_V1)
  67
  68/*
  69 * It seems the resolution for hardware version 2 doubled.
  70 * Hence the X and Y ranges are doubled too.
  71 * The bezel around the pad also appears to be smaller
  72 */
  73#define ETP_EDGE_FUZZ_V2                8
  74
  75#define ETP_XMIN_V2                     (   0 + ETP_EDGE_FUZZ_V2)
  76#define ETP_XMAX_V2                     (1152 - ETP_EDGE_FUZZ_V2)
  77#define ETP_YMIN_V2                     (   0 + ETP_EDGE_FUZZ_V2)
  78#define ETP_YMAX_V2                     ( 768 - ETP_EDGE_FUZZ_V2)
  79
  80/*
  81 * For two finger touches the coordinate of each finger gets reported
  82 * separately but with reduced resolution.
  83 */
  84#define ETP_2FT_FUZZ                    4
  85
  86#define ETP_2FT_XMIN                    (  0 + ETP_2FT_FUZZ)
  87#define ETP_2FT_XMAX                    (288 - ETP_2FT_FUZZ)
  88#define ETP_2FT_YMIN                    (  0 + ETP_2FT_FUZZ)
  89#define ETP_2FT_YMAX                    (192 - ETP_2FT_FUZZ)
  90
  91struct elantech_data {
  92        unsigned char reg_10;
  93        unsigned char reg_11;
  94        unsigned char reg_20;
  95        unsigned char reg_21;
  96        unsigned char reg_22;
  97        unsigned char reg_23;
  98        unsigned char reg_24;
  99        unsigned char reg_25;
 100        unsigned char reg_26;
 101        unsigned char debug;
 102        unsigned char capabilities;
 103        unsigned char fw_version_maj;
 104        unsigned char fw_version_min;
 105        unsigned char hw_version;
 106        unsigned char paritycheck;
 107        unsigned char jumpy_cursor;
 108        unsigned char parity[256];
 109};
 110
 111#ifdef CONFIG_MOUSE_PS2_ELANTECH
 112int elantech_detect(struct psmouse *psmouse, bool set_properties);
 113int elantech_init(struct psmouse *psmouse);
 114#else
 115static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
 116{
 117        return -ENOSYS;
 118}
 119static inline int elantech_init(struct psmouse *psmouse)
 120{
 121        return -ENOSYS;
 122}
 123#endif /* CONFIG_MOUSE_PS2_ELANTECH */
 124
 125#endif
 126