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_ID_QUERY                 0x00
  20 #define ETP_FW_VERSION_QUERY            0x01
  21 #define ETP_CAPABILITIES_QUERY          0x02
  22 #define ETP_SAMPLE_QUERY                0x03
  23
  24 /*
  25  * Command values for register reading or writing
  26  */
  27 #define ETP_REGISTER_READ               0x10
  28 #define ETP_REGISTER_WRITE              0x11
  29 #define ETP_REGISTER_READWRITE          0x00
  30
  31 /*
  32  * Hardware version 2 custom PS/2 command value
  33  */
  34 #define ETP_PS2_CUSTOM_COMMAND          0xf8
  35
  36 /*
  37  * Times to retry a ps2_command and millisecond delay between tries
  38  */
  39 #define ETP_PS2_COMMAND_TRIES           3
  40 #define ETP_PS2_COMMAND_DELAY           500
  41
  42 /*
  43  * Times to try to read back a register and millisecond delay between tries
  44  */
  45 #define ETP_READ_BACK_TRIES             5
  46 #define ETP_READ_BACK_DELAY             2000
  47
  48 /*
  49  * Register bitmasks for hardware version 1
  50  */
  51 #define ETP_R10_ABSOLUTE_MODE           0x04
  52 #define ETP_R11_4_BYTE_MODE             0x02
  53
  54 /*
  55  * Capability bitmasks
  56  */
  57 #define ETP_CAP_HAS_ROCKER              0x04
  58
  59 /*
  60  * One hard to find application note states that X axis range is 0 to 576
  61  * and Y axis range is 0 to 384 for harware version 1.
  62  * Edge fuzz might be necessary because of bezel around the touchpad
  63  */
  64 #define ETP_EDGE_FUZZ_V1                32
  65
  66 #define ETP_XMIN_V1                     (  0 + ETP_EDGE_FUZZ_V1)
  67 #define ETP_XMAX_V1                     (576 - ETP_EDGE_FUZZ_V1)
  68 #define ETP_YMIN_V1                     (  0 + ETP_EDGE_FUZZ_V1)
  69 #define ETP_YMAX_V1                     (384 - ETP_EDGE_FUZZ_V1)
  70
  71 /*
  72  * The resolution for older v2 hardware doubled.
  73  * (newer v2's firmware provides command so we can query)
  74  */
  75 #define ETP_XMIN_V2                     0
  76 #define ETP_XMAX_V2                     1152
  77 #define ETP_YMIN_V2                     0
  78 #define ETP_YMAX_V2                     768
  79
  80 #define ETP_PMIN_V2                     0
  81 #define ETP_PMAX_V2                     255
  82 #define ETP_WMIN_V2                     0
  83 #define ETP_WMAX_V2                     15
  84
  85 /*
  86  * v3 hardware has 2 kinds of packet types,
  87  * v4 hardware has 3.
  88  */
  89 #define PACKET_UNKNOWN                  0x01
  90 #define PACKET_DEBOUNCE                 0x02
  91 #define PACKET_V3_HEAD                  0x03
  92 #define PACKET_V3_TAIL                  0x04
  93 #define PACKET_V4_HEAD                  0x05
  94 #define PACKET_V4_MOTION                0x06
  95 #define PACKET_V4_STATUS                0x07
  96
  97 /*
  98  * track up to 5 fingers for v4 hardware
  99  */
 100 #define ETP_MAX_FINGERS                 5
 101
 102 /*
 103  * weight value for v4 hardware
 104  */
 105 #define ETP_WEIGHT_VALUE                5
 106
 107 /*
 108  * The base position for one finger, v4 hardware
 109  */
 110 struct finger_pos {
 111         unsigned int x;
 112         unsigned int y;
 113 };
 114
 115 struct elantech_data {
 116         unsigned char reg_07;
 117         unsigned char reg_10;
 118         unsigned char reg_11;
 119         unsigned char reg_20;
 120         unsigned char reg_21;
 121         unsigned char reg_22;
 122         unsigned char reg_23;
 123         unsigned char reg_24;
 124         unsigned char reg_25;
 125         unsigned char reg_26;
 126         unsigned char debug;
 127         unsigned char capabilities[3];
 128         bool paritycheck;
 129         bool jumpy_cursor;
 130         bool reports_pressure;
 131         unsigned char hw_version;
 132         unsigned int fw_version;
 133         unsigned int single_finger_reports;
 134         unsigned int y_max;
 135         unsigned int width;
 136         struct finger_pos mt[ETP_MAX_FINGERS];
 137         unsigned char parity[256];
 138 };
 139
 140 #ifdef CONFIG_MOUSE_PS2_ELANTECH
 141 int elantech_detect(struct psmouse *psmouse, bool set_properties);
 142 int elantech_init(struct psmouse *psmouse);
 143 #else
 144 static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
 145 {
 146         return -ENOSYS;
 147 }
 148 static inline int elantech_init(struct psmouse *psmouse)
 149 {
 150         return -ENOSYS;
 151 }
 152 #endif /* CONFIG_MOUSE_PS2_ELANTECH */
 153
 154 #endif