drivers/input/mouse/alps.h

   1 /*
   2  * ALPS touchpad PS/2 mouse driver
   3  *
   4  * Copyright (c) 2003 Peter Osterlund <petero2@telia.com>
   5  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  */
  11
  12 #ifndef _ALPS_H
  13 #define _ALPS_H
  14
  15 #define ALPS_PROTO_V1   1
  16 #define ALPS_PROTO_V2   2
  17 #define ALPS_PROTO_V3   3
  18 #define ALPS_PROTO_V4   4
  19 #define ALPS_PROTO_V5   5
  20
  21 /**
  22  * struct alps_model_info - touchpad ID table
  23  * @signature: E7 response string to match.
  24  * @command_mode_resp: For V3/V4 touchpads, the final byte of the EC response
  25  *   (aka command mode response) identifies the firmware minor version.  This
  26  *   can be used to distinguish different hardware models which are not
  27  *   uniquely identifiable through their E7 responses.
  28  * @proto_version: Indicates V1/V2/V3/...
  29  * @byte0: Helps figure out whether a position report packet matches the
  30  *   known format for this model.  The first byte of the report, ANDed with
  31  *   mask0, should match byte0.
  32  * @mask0: The mask used to check the first byte of the report.
  33  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
  34  *
  35  * Many (but not all) ALPS touchpads can be identified by looking at the
  36  * values returned in the "E7 report" and/or the "EC report."  This table
  37  * lists a number of such touchpads.
  38  */
  39 struct alps_model_info {
  40         unsigned char signature[3];
  41         unsigned char command_mode_resp;
  42         unsigned char proto_version;
  43         unsigned char byte0, mask0;
  44         unsigned char flags;
  45 };
  46
  47 /**
  48  * struct alps_nibble_commands - encodings for register accesses
  49  * @command: PS/2 command used for the nibble
  50  * @data: Data supplied as an argument to the PS/2 command, if applicable
  51  *
  52  * The ALPS protocol uses magic sequences to transmit binary data to the
  53  * touchpad, as it is generally not OK to send arbitrary bytes out the
  54  * PS/2 port.  Each of the sequences in this table sends one nibble of the
  55  * register address or (write) data.  Different versions of the ALPS protocol
  56  * use slightly different encodings.
  57  */
  58 struct alps_nibble_commands {
  59         int command;
  60         unsigned char data;
  61 };
  62
  63 /**
  64  * struct alps_fields - decoded version of the report packet
  65  * @x_map: Bitmap of active X positions for MT.
  66  * @y_map: Bitmap of active Y positions for MT.
  67  * @fingers: Number of fingers for MT.
  68  * @x: X position for ST.
  69  * @y: Y position for ST.
  70  * @z: Z position for ST.
  71  * @first_mp: Packet is the first of a multi-packet report.
  72  * @is_mp: Packet is part of a multi-packet report.
  73  * @left: Left touchpad button is active.
  74  * @right: Right touchpad button is active.
  75  * @middle: Middle touchpad button is active.
  76  * @ts_left: Left trackstick button is active.
  77  * @ts_right: Right trackstick button is active.
  78  * @ts_middle: Middle trackstick button is active.
  79  */
  80 struct alps_fields {
  81         unsigned int x_map;
  82         unsigned int y_map;
  83         unsigned int fingers;
  84         unsigned int x;
  85         unsigned int y;
  86         unsigned int z;
  87         unsigned int first_mp:1;
  88         unsigned int is_mp:1;
  89
  90         unsigned int left:1;
  91         unsigned int right:1;
  92         unsigned int middle:1;
  93
  94         unsigned int ts_left:1;
  95         unsigned int ts_right:1;
  96         unsigned int ts_middle:1;
  97 };
  98
  99 /**
 100  * struct alps_data - private data structure for the ALPS driver
 101  * @dev2: "Relative" device used to report trackstick or mouse activity.
 102  * @phys: Physical path for the relative device.
 103  * @nibble_commands: Command mapping used for touchpad register accesses.
 104  * @addr_command: Command used to tell the touchpad that a register address
 105  *   follows.
 106  * @proto_version: Indicates V1/V2/V3/...
 107  * @byte0: Helps figure out whether a position report packet matches the
 108  *   known format for this model.  The first byte of the report, ANDed with
 109  *   mask0, should match byte0.
 110  * @mask0: The mask used to check the first byte of the report.
 111  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
 112  * @x_max: Largest possible X position value.
 113  * @y_max: Largest possible Y position value.
 114  * @x_bits: Number of X bits in the MT bitmap.
 115  * @y_bits: Number of Y bits in the MT bitmap.
 116  * @hw_init: Protocol-specific hardware init function.
 117  * @process_packet: Protocol-specific function to process a report packet.
 118  * @decode_fields: Protocol-specific function to read packet bitfields.
 119  * @set_abs_params: Protocol-specific function to configure the input_dev.
 120  * @prev_fin: Finger bit from previous packet.
 121  * @multi_packet: Multi-packet data in progress.
 122  * @multi_data: Saved multi-packet data.
 123  * @x1: First X coordinate from last MT report.
 124  * @x2: Second X coordinate from last MT report.
 125  * @y1: First Y coordinate from last MT report.
 126  * @y2: Second Y coordinate from last MT report.
 127  * @fingers: Number of fingers from last MT report.
 128  * @quirks: Bitmap of ALPS_QUIRK_*.
 129  * @timer: Timer for flushing out the final report packet in the stream.
 130  */
 131 struct alps_data {
 132         struct input_dev *dev2;
 133         char phys[32];
 134
 135         /* these are autodetected when the device is identified */
 136         const struct alps_nibble_commands *nibble_commands;
 137         int addr_command;
 138         unsigned char proto_version;
 139         unsigned char byte0, mask0;
 140         unsigned char flags;
 141         int x_max;
 142         int y_max;
 143         int x_bits;
 144         int y_bits;
 145
 146         int (*hw_init)(struct psmouse *psmouse);
 147         void (*process_packet)(struct psmouse *psmouse);
 148         void (*decode_fields)(struct alps_fields *f, unsigned char *p);
 149         void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1);
 150
 151         int prev_fin;
 152         int multi_packet;
 153         unsigned char multi_data[6];
 154         int x1, x2, y1, y2;
 155         int fingers;
 156         u8 quirks;
 157         struct timer_list timer;
 158 };
 159
 160 #define ALPS_QUIRK_TRACKSTICK_BUTTONS   1 /* trakcstick buttons in trackstick packet */
 161
 162 #ifdef CONFIG_MOUSE_PS2_ALPS
 163 int alps_detect(struct psmouse *psmouse, bool set_properties);
 164 int alps_init(struct psmouse *psmouse);
 165 #else
 166 inline int alps_detect(struct psmouse *psmouse, bool set_properties)
 167 {
 168         return -ENOSYS;
 169 }
 170 inline int alps_init(struct psmouse *psmouse)
 171 {
 172         return -ENOSYS;
 173 }
 174 #endif /* CONFIG_MOUSE_PS2_ALPS */
 175
 176 #endif