drivers/input/mouse/trackpoint.h

   1 /*
   2  * IBM TrackPoint PS/2 mouse driver
   3  *
   4  * Stephen Evanchik <evanchsa@gmail.com>
   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 by
   8  * the Free Software Foundation.
   9  */
  10
  11 #ifndef _TRACKPOINT_H
  12 #define _TRACKPOINT_H
  13
  14 /*
  15  * These constants are from the TrackPoint System
  16  * Engineering documentation Version 4 from IBM Watson
  17  * research:
  18  *      http://wwwcssrv.almaden.ibm.com/trackpoint/download.html
  19  */
  20
  21 #define TP_COMMAND              0xE2    /* Commands start with this */
  22
  23 #define TP_READ_ID              0xE1    /* Sent for device identification */
  24 #define TP_MAGIC_IDENT          0x01    /* Sent after a TP_READ_ID followed */
  25                                         /* by the firmware ID */
  26
  27
  28 /*
  29  * Commands
  30  */
  31 #define TP_RECALIB              0x51    /* Recalibrate */
  32 #define TP_POWER_DOWN           0x44    /* Can only be undone through HW reset */
  33 #define TP_EXT_DEV              0x21    /* Determines if external device is connected (RO) */
  34 #define TP_EXT_BTN              0x4B    /* Read extended button status */
  35 #define TP_POR                  0x7F    /* Execute Power on Reset */
  36 #define TP_POR_RESULTS          0x25    /* Read Power on Self test results */
  37 #define TP_DISABLE_EXT          0x40    /* Disable external pointing device */
  38 #define TP_ENABLE_EXT           0x41    /* Enable external pointing device */
  39
  40 /*
  41  * Mode manipulation
  42  */
  43 #define TP_SET_SOFT_TRANS       0x4E    /* Set mode */
  44 #define TP_CANCEL_SOFT_TRANS    0xB9    /* Cancel mode */
  45 #define TP_SET_HARD_TRANS       0x45    /* Mode can only be set */
  46
  47
  48 /*
  49  * Register oriented commands/properties
  50  */
  51 #define TP_WRITE_MEM            0x81
  52 #define TP_READ_MEM             0x80    /* Not used in this implementation */
  53
  54 /*
  55 * RAM Locations for properties
  56  */
  57 #define TP_SENS                 0x4A    /* Sensitivity */
  58 #define TP_MB                   0x4C    /* Read Middle Button Status (RO) */
  59 #define TP_INERTIA              0x4D    /* Negative Inertia */
  60 #define TP_SPEED                0x60    /* Speed of TP Cursor */
  61 #define TP_REACH                0x57    /* Backup for Z-axis press */
  62 #define TP_DRAGHYS              0x58    /* Drag Hysteresis */
  63                                         /* (how hard it is to drag */
  64                                         /* with Z-axis pressed) */
  65
  66 #define TP_MINDRAG              0x59    /* Minimum amount of force needed */
  67                                         /* to trigger dragging */
  68
  69 #define TP_THRESH               0x5C    /* Minimum value for a Z-axis press */
  70 #define TP_UP_THRESH            0x5A    /* Used to generate a 'click' on Z-axis */
  71 #define TP_Z_TIME               0x5E    /* How sharp of a press */
  72 #define TP_JENKS_CURV           0x5D    /* Minimum curvature for double click */
  73
  74 /*
  75  * Toggling Flag bits
  76  */
  77 #define TP_TOGGLE               0x47    /* Toggle command */
  78
  79 #define TP_TOGGLE_MB            0x23    /* Disable/Enable Middle Button */
  80 #define TP_MASK_MB                      0x01
  81 #define TP_TOGGLE_EXT_DEV       0x23    /* Disable external device */
  82 #define TP_MASK_EXT_DEV                 0x02
  83 #define TP_TOGGLE_DRIFT         0x23    /* Drift Correction */
  84 #define TP_MASK_DRIFT                   0x80
  85 #define TP_TOGGLE_BURST         0x28    /* Burst Mode */
  86 #define TP_MASK_BURST                   0x80
  87 #define TP_TOGGLE_PTSON         0x2C    /* Press to Select */
  88 #define TP_MASK_PTSON                   0x01
  89 #define TP_TOGGLE_HARD_TRANS    0x2C    /* Alternate method to set Hard Transparency */
  90 #define TP_MASK_HARD_TRANS              0x80
  91 #define TP_TOGGLE_TWOHAND       0x2D    /* Two handed */
  92 #define TP_MASK_TWOHAND                 0x01
  93 #define TP_TOGGLE_STICKY_TWO    0x2D    /* Sticky two handed */
  94 #define TP_MASK_STICKY_TWO              0x04
  95 #define TP_TOGGLE_SKIPBACK      0x2D    /* Suppress movement after drag release */
  96 #define TP_MASK_SKIPBACK                0x08
  97 #define TP_TOGGLE_SOURCE_TAG    0x20    /* Bit 3 of the first packet will be set to
  98                                            to the origin of the packet (external or TP) */
  99 #define TP_MASK_SOURCE_TAG              0x80
 100 #define TP_TOGGLE_EXT_TAG       0x22    /* Bit 3 of the first packet coming from the
 101                                            external device will be forced to 1 */
 102 #define TP_MASK_EXT_TAG                 0x04
 103
 104
 105 /* Power on Self Test Results */
 106 #define TP_POR_SUCCESS          0x3B
 107
 108 /*
 109  * Default power on values
 110  */
 111 #define TP_DEF_SENS             0x80
 112 #define TP_DEF_INERTIA          0x06
 113 #define TP_DEF_SPEED            0x61
 114 #define TP_DEF_REACH            0x0A
 115
 116 #define TP_DEF_DRAGHYS          0xFF
 117 #define TP_DEF_MINDRAG          0x14
 118
 119 #define TP_DEF_THRESH           0x08
 120 #define TP_DEF_UP_THRESH        0xFF
 121 #define TP_DEF_Z_TIME           0x26
 122 #define TP_DEF_JENKS_CURV       0x87
 123
 124 /* Toggles */
 125 #define TP_DEF_MB               0x00
 126 #define TP_DEF_PTSON            0x00
 127 #define TP_DEF_SKIPBACK         0x00
 128 #define TP_DEF_EXT_DEV          0x00    /* 0 means enabled */
 129
 130 #define MAKE_PS2_CMD(params, results, cmd) ((params<<12) | (results<<8) | (cmd))
 131
 132 struct trackpoint_data
 133 {
 134         unsigned char sensitivity, speed, inertia, reach;
 135         unsigned char draghys, mindrag;
 136         unsigned char thresh, upthresh;
 137         unsigned char ztime, jenks;
 138
 139         unsigned char press_to_select;
 140         unsigned char skipback;
 141
 142         unsigned char ext_dev;
 143 };
 144
 145 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
 146 int trackpoint_detect(struct psmouse *psmouse, int set_properties);
 147 #else
 148 inline int trackpoint_detect(struct psmouse *psmouse, int set_properties)
 149 {
 150         return -ENOSYS;
 151 }
 152 #endif /* CONFIG_MOUSE_PS2_TRACKPOINT */
 153
 154 #endif /* _TRACKPOINT_H */