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 #define ETP_RESOLUTION_QUERY            0x04
  24
  25 /*
  26  * Command values for register reading or writing
  27  */
  28 #define ETP_REGISTER_READ               0x10
  29 #define ETP_REGISTER_WRITE              0x11
  30 #define ETP_REGISTER_READWRITE          0x00
  31
  32 /*
  33  * Hardware version 2 custom PS/2 command value
  34  */
  35 #define ETP_PS2_CUSTOM_COMMAND          0xf8
  36
  37 /*
  38  * Times to retry a ps2_command and millisecond delay between tries
  39  */
  40 #define ETP_PS2_COMMAND_TRIES           3
  41 #define ETP_PS2_COMMAND_DELAY           500
  42
  43 /*
  44  * Times to try to read back a register and millisecond delay between tries
  45  */
  46 #define ETP_READ_BACK_TRIES             5
  47 #define ETP_READ_BACK_DELAY             2000
  48
  49 /*
  50  * Register bitmasks for hardware version 1
  51  */
  52 #define ETP_R10_ABSOLUTE_MODE           0x04
  53 #define ETP_R11_4_BYTE_MODE             0x02
  54
  55 /*
  56  * Capability bitmasks
  57  */
  58 #define ETP_CAP_HAS_ROCKER              0x04
  59
  60 /*
  61  * One hard to find application note states that X axis range is 0 to 576
  62  * and Y axis range is 0 to 384 for harware version 1.
  63  * Edge fuzz might be necessary because of bezel around the touchpad
  64  */
  65 #define ETP_EDGE_FUZZ_V1                32
  66
  67 #define ETP_XMIN_V1                     (  0 + ETP_EDGE_FUZZ_V1)
  68 #define ETP_XMAX_V1                     (576 - ETP_EDGE_FUZZ_V1)
  69 #define ETP_YMIN_V1                     (  0 + ETP_EDGE_FUZZ_V1)
  70 #define ETP_YMAX_V1                     (384 - ETP_EDGE_FUZZ_V1)
  71
  72 /*
  73  * The resolution for older v2 hardware doubled.
  74  * (newer v2's firmware provides command so we can query)
  75  */
  76 #define ETP_XMIN_V2                     0
  77 #define ETP_XMAX_V2                     1152
  78 #define ETP_YMIN_V2                     0
  79 #define ETP_YMAX_V2                     768
  80
  81 #define ETP_PMIN_V2                     0
  82 #define ETP_PMAX_V2                     255
  83 #define ETP_WMIN_V2                     0
  84 #define ETP_WMAX_V2                     15
  85
  86 /*
  87  * v3 hardware has 2 kinds of packet types,
  88  * v4 hardware has 3.
  89  */
  90 #define PACKET_UNKNOWN                  0x01
  91 #define PACKET_DEBOUNCE                 0x02
  92 #define PACKET_V3_HEAD                  0x03
  93 #define PACKET_V3_TAIL                  0x04
  94 #define PACKET_V4_HEAD                  0x05
  95 #define PACKET_V4_MOTION                0x06
  96 #define PACKET_V4_STATUS                0x07
  97
  98 /*
  99  * track up to 5 fingers for v4 hardware
 100  */
 101 #define ETP_MAX_FINGERS                 5
 102
 103 /*
 104  * weight value for v4 hardware
 105  */
 106 #define ETP_WEIGHT_VALUE                5
 107
 108 /*
 109  * The base position for one finger, v4 hardware
 110  */
 111 struct finger_pos {
 112         unsigned int x;
 113         unsigned int y;
 114 };
 115
 116 struct elantech_data {
 117         unsigned char reg_07;
 118         unsigned char reg_10;
 119         unsigned char reg_11;
 120         unsigned char reg_20;
 121         unsigned char reg_21;
 122         unsigned char reg_22;
 123         unsigned char reg_23;
 124         unsigned char reg_24;
 125         unsigned char reg_25;
 126         unsigned char reg_26;
 127         unsigned char debug;
 128         unsigned char capabilities[3];
 129         bool paritycheck;
 130         bool jumpy_cursor;
 131         bool reports_pressure;
 132         bool crc_enabled;
 133         unsigned char hw_version;
 134         unsigned int fw_version;
 135         unsigned int single_finger_reports;
 136         unsigned int y_max;
 137         unsigned int width;
 138         struct finger_pos mt[ETP_MAX_FINGERS];
 139         unsigned char parity[256];
 140         int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param);
 141 };
 142
 143 #ifdef CONFIG_MOUSE_PS2_ELANTECH
 144 int elantech_detect(struct psmouse *psmouse, bool set_properties);
 145 int elantech_init(struct psmouse *psmouse);
 146 #else
 147 static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
 148 {
 149         return -ENOSYS;
 150 }
 151 static inline int elantech_init(struct psmouse *psmouse)
 152 {
 153         return -ENOSYS;
 154 }
 155 #endif /* CONFIG_MOUSE_PS2_ELANTECH */
 156
 157 #endif