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 #define ALPS_PROTO_V6   6
  21
  22 #define DOLPHIN_COUNT_PER_ELECTRODE     64
  23 #define DOLPHIN_PROFILE_XOFFSET         8       /* x-electrode offset */
  24 #define DOLPHIN_PROFILE_YOFFSET         1       /* y-electrode offset */
  25
  26 /**
  27  * struct alps_model_info - touchpad ID table
  28  * @signature: E7 response string to match.
  29  * @command_mode_resp: For V3/V4 touchpads, the final byte of the EC response
  30  *   (aka command mode response) identifies the firmware minor version.  This
  31  *   can be used to distinguish different hardware models which are not
  32  *   uniquely identifiable through their E7 responses.
  33  * @proto_version: Indicates V1/V2/V3/...
  34  * @byte0: Helps figure out whether a position report packet matches the
  35  *   known format for this model.  The first byte of the report, ANDed with
  36  *   mask0, should match byte0.
  37  * @mask0: The mask used to check the first byte of the report.
  38  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
  39  *
  40  * Many (but not all) ALPS touchpads can be identified by looking at the
  41  * values returned in the "E7 report" and/or the "EC report."  This table
  42  * lists a number of such touchpads.
  43  */
  44 struct alps_model_info {
  45         unsigned char signature[3];
  46         unsigned char command_mode_resp;
  47         unsigned char proto_version;
  48         unsigned char byte0, mask0;
  49         unsigned char flags;
  50 };
  51
  52 /**
  53  * struct alps_nibble_commands - encodings for register accesses
  54  * @command: PS/2 command used for the nibble
  55  * @data: Data supplied as an argument to the PS/2 command, if applicable
  56  *
  57  * The ALPS protocol uses magic sequences to transmit binary data to the
  58  * touchpad, as it is generally not OK to send arbitrary bytes out the
  59  * PS/2 port.  Each of the sequences in this table sends one nibble of the
  60  * register address or (write) data.  Different versions of the ALPS protocol
  61  * use slightly different encodings.
  62  */
  63 struct alps_nibble_commands {
  64         int command;
  65         unsigned char data;
  66 };
  67
  68 /**
  69  * struct alps_fields - decoded version of the report packet
  70  * @x_map: Bitmap of active X positions for MT.
  71  * @y_map: Bitmap of active Y positions for MT.
  72  * @fingers: Number of fingers for MT.
  73  * @x: X position for ST.
  74  * @y: Y position for ST.
  75  * @z: Z position for ST.
  76  * @first_mp: Packet is the first of a multi-packet report.
  77  * @is_mp: Packet is part of a multi-packet report.
  78  * @left: Left touchpad button is active.
  79  * @right: Right touchpad button is active.
  80  * @middle: Middle touchpad button is active.
  81  * @ts_left: Left trackstick button is active.
  82  * @ts_right: Right trackstick button is active.
  83  * @ts_middle: Middle trackstick button is active.
  84  */
  85 struct alps_fields {
  86         unsigned int x_map;
  87         unsigned int y_map;
  88         unsigned int fingers;
  89         unsigned int x;
  90         unsigned int y;
  91         unsigned int z;
  92         unsigned int first_mp:1;
  93         unsigned int is_mp:1;
  94
  95         unsigned int left:1;
  96         unsigned int right:1;
  97         unsigned int middle:1;
  98
  99         unsigned int ts_left:1;
 100         unsigned int ts_right:1;
 101         unsigned int ts_middle:1;
 102 };
 103
 104 /**
 105  * struct alps_data - private data structure for the ALPS driver
 106  * @dev2: "Relative" device used to report trackstick or mouse activity.
 107  * @phys: Physical path for the relative device.
 108  * @nibble_commands: Command mapping used for touchpad register accesses.
 109  * @addr_command: Command used to tell the touchpad that a register address
 110  *   follows.
 111  * @proto_version: Indicates V1/V2/V3/...
 112  * @byte0: Helps figure out whether a position report packet matches the
 113  *   known format for this model.  The first byte of the report, ANDed with
 114  *   mask0, should match byte0.
 115  * @mask0: The mask used to check the first byte of the report.
 116  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
 117  * @x_max: Largest possible X position value.
 118  * @y_max: Largest possible Y position value.
 119  * @x_bits: Number of X bits in the MT bitmap.
 120  * @y_bits: Number of Y bits in the MT bitmap.
 121  * @hw_init: Protocol-specific hardware init function.
 122  * @process_packet: Protocol-specific function to process a report packet.
 123  * @decode_fields: Protocol-specific function to read packet bitfields.
 124  * @set_abs_params: Protocol-specific function to configure the input_dev.
 125  * @prev_fin: Finger bit from previous packet.
 126  * @multi_packet: Multi-packet data in progress.
 127  * @multi_data: Saved multi-packet data.
 128  * @x1: First X coordinate from last MT report.
 129  * @x2: Second X coordinate from last MT report.
 130  * @y1: First Y coordinate from last MT report.
 131  * @y2: Second Y coordinate from last MT report.
 132  * @fingers: Number of fingers from last MT report.
 133  * @quirks: Bitmap of ALPS_QUIRK_*.
 134  * @timer: Timer for flushing out the final report packet in the stream.
 135  */
 136 struct alps_data {
 137         struct input_dev *dev2;
 138         char phys[32];
 139
 140         /* these are autodetected when the device is identified */
 141         const struct alps_nibble_commands *nibble_commands;
 142         int addr_command;
 143         unsigned char proto_version;
 144         unsigned char byte0, mask0;
 145         unsigned char flags;
 146         int x_max;
 147         int y_max;
 148         int x_bits;
 149         int y_bits;
 150
 151         int (*hw_init)(struct psmouse *psmouse);
 152         void (*process_packet)(struct psmouse *psmouse);
 153         void (*decode_fields)(struct alps_fields *f, unsigned char *p,
 154                               struct psmouse *psmouse);
 155         void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1);
 156
 157         int prev_fin;
 158         int multi_packet;
 159         unsigned char multi_data[6];
 160         int x1, x2, y1, y2;
 161         int fingers;
 162         u8 quirks;
 163         struct timer_list timer;
 164 };
 165
 166 #define ALPS_QUIRK_TRACKSTICK_BUTTONS   1 /* trakcstick buttons in trackstick packet */
 167
 168 #ifdef CONFIG_MOUSE_PS2_ALPS
 169 int alps_detect(struct psmouse *psmouse, bool set_properties);
 170 int alps_init(struct psmouse *psmouse);
 171 #else
 172 inline int alps_detect(struct psmouse *psmouse, bool set_properties)
 173 {
 174         return -ENOSYS;
 175 }
 176 inline int alps_init(struct psmouse *psmouse)
 177 {
 178         return -ENOSYS;
 179 }
 180 #endif /* CONFIG_MOUSE_PS2_ALPS */
 181
 182 #endif