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 #include <linux/input/mt.h>
  16
  17 #define ALPS_PROTO_V1   1
  18 #define ALPS_PROTO_V2   2
  19 #define ALPS_PROTO_V3   3
  20 #define ALPS_PROTO_V4   4
  21 #define ALPS_PROTO_V5   5
  22 #define ALPS_PROTO_V6   6
  23 #define ALPS_PROTO_V7   7       /* t3btl t4s */
  24
  25 #define MAX_TOUCHES     2
  26
  27 #define DOLPHIN_COUNT_PER_ELECTRODE     64
  28 #define DOLPHIN_PROFILE_XOFFSET         8       /* x-electrode offset */
  29 #define DOLPHIN_PROFILE_YOFFSET         1       /* y-electrode offset */
  30
  31 /*
  32  * enum V7_PACKET_ID - defines the packet type for V7
  33  * V7_PACKET_ID_IDLE: There's no finger and no button activity.
  34  * V7_PACKET_ID_TWO: There's one or two non-resting fingers on touchpad
  35  *  or there's button activities.
  36  * V7_PACKET_ID_MULTI: There are at least three non-resting fingers.
  37  * V7_PACKET_ID_NEW: The finger position in slot is not continues from
  38  *  previous packet.
  39 */
  40 enum V7_PACKET_ID {
  41          V7_PACKET_ID_IDLE,
  42          V7_PACKET_ID_TWO,
  43          V7_PACKET_ID_MULTI,
  44          V7_PACKET_ID_NEW,
  45          V7_PACKET_ID_UNKNOWN,
  46 };
  47
  48 /**
  49  * struct alps_model_info - touchpad ID table
  50  * @signature: E7 response string to match.
  51  * @command_mode_resp: For V3/V4 touchpads, the final byte of the EC response
  52  *   (aka command mode response) identifies the firmware minor version.  This
  53  *   can be used to distinguish different hardware models which are not
  54  *   uniquely identifiable through their E7 responses.
  55  * @proto_version: Indicates V1/V2/V3/...
  56  * @byte0: Helps figure out whether a position report packet matches the
  57  *   known format for this model.  The first byte of the report, ANDed with
  58  *   mask0, should match byte0.
  59  * @mask0: The mask used to check the first byte of the report.
  60  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
  61  *
  62  * Many (but not all) ALPS touchpads can be identified by looking at the
  63  * values returned in the "E7 report" and/or the "EC report."  This table
  64  * lists a number of such touchpads.
  65  */
  66 struct alps_model_info {
  67         unsigned char signature[3];
  68         unsigned char command_mode_resp;
  69         unsigned char proto_version;
  70         unsigned char byte0, mask0;
  71         int flags;
  72 };
  73
  74 /**
  75  * struct alps_nibble_commands - encodings for register accesses
  76  * @command: PS/2 command used for the nibble
  77  * @data: Data supplied as an argument to the PS/2 command, if applicable
  78  *
  79  * The ALPS protocol uses magic sequences to transmit binary data to the
  80  * touchpad, as it is generally not OK to send arbitrary bytes out the
  81  * PS/2 port.  Each of the sequences in this table sends one nibble of the
  82  * register address or (write) data.  Different versions of the ALPS protocol
  83  * use slightly different encodings.
  84  */
  85 struct alps_nibble_commands {
  86         int command;
  87         unsigned char data;
  88 };
  89
  90 struct alps_bitmap_point {
  91         int start_bit;
  92         int num_bits;
  93 };
  94
  95 /**
  96  * struct alps_fields - decoded version of the report packet
  97  * @x_map: Bitmap of active X positions for MT.
  98  * @y_map: Bitmap of active Y positions for MT.
  99  * @fingers: Number of fingers for MT.
 100  * @pressure: Pressure.
 101  * @st: position for ST.
 102  * @mt: position for MT.
 103  * @first_mp: Packet is the first of a multi-packet report.
 104  * @is_mp: Packet is part of a multi-packet report.
 105  * @left: Left touchpad button is active.
 106  * @right: Right touchpad button is active.
 107  * @middle: Middle touchpad button is active.
 108  * @ts_left: Left trackstick button is active.
 109  * @ts_right: Right trackstick button is active.
 110  * @ts_middle: Middle trackstick button is active.
 111  */
 112 struct alps_fields {
 113         unsigned int x_map;
 114         unsigned int y_map;
 115         unsigned int fingers;
 116
 117         int pressure;
 118         struct input_mt_pos st;
 119         struct input_mt_pos mt[MAX_TOUCHES];
 120
 121         unsigned int first_mp:1;
 122         unsigned int is_mp:1;
 123
 124         unsigned int left:1;
 125         unsigned int right:1;
 126         unsigned int middle:1;
 127
 128         unsigned int ts_left:1;
 129         unsigned int ts_right:1;
 130         unsigned int ts_middle:1;
 131 };
 132
 133 /**
 134  * struct alps_data - private data structure for the ALPS driver
 135  * @dev2: "Relative" device used to report trackstick or mouse activity.
 136  * @phys: Physical path for the relative device.
 137  * @nibble_commands: Command mapping used for touchpad register accesses.
 138  * @addr_command: Command used to tell the touchpad that a register address
 139  *   follows.
 140  * @proto_version: Indicates V1/V2/V3/...
 141  * @byte0: Helps figure out whether a position report packet matches the
 142  *   known format for this model.  The first byte of the report, ANDed with
 143  *   mask0, should match byte0.
 144  * @mask0: The mask used to check the first byte of the report.
 145  * @fw_ver: cached copy of firmware version (EC report)
 146  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
 147  * @x_max: Largest possible X position value.
 148  * @y_max: Largest possible Y position value.
 149  * @x_bits: Number of X bits in the MT bitmap.
 150  * @y_bits: Number of Y bits in the MT bitmap.
 151  * @hw_init: Protocol-specific hardware init function.
 152  * @process_packet: Protocol-specific function to process a report packet.
 153  * @decode_fields: Protocol-specific function to read packet bitfields.
 154  * @set_abs_params: Protocol-specific function to configure the input_dev.
 155  * @prev_fin: Finger bit from previous packet.
 156  * @multi_packet: Multi-packet data in progress.
 157  * @multi_data: Saved multi-packet data.
 158  * @f: Decoded packet data fields.
 159  * @quirks: Bitmap of ALPS_QUIRK_*.
 160  * @timer: Timer for flushing out the final report packet in the stream.
 161  */
 162 struct alps_data {
 163         struct input_dev *dev2;
 164         char phys[32];
 165
 166         /* these are autodetected when the device is identified */
 167         const struct alps_nibble_commands *nibble_commands;
 168         int addr_command;
 169         unsigned char proto_version;
 170         unsigned char byte0, mask0;
 171         unsigned char fw_ver[3];
 172         int flags;
 173         int x_max;
 174         int y_max;
 175         int x_bits;
 176         int y_bits;
 177         unsigned int x_res;
 178         unsigned int y_res;
 179
 180         int (*hw_init)(struct psmouse *psmouse);
 181         void (*process_packet)(struct psmouse *psmouse);
 182         int (*decode_fields)(struct alps_fields *f, unsigned char *p,
 183                               struct psmouse *psmouse);
 184         void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1);
 185
 186         int prev_fin;
 187         int multi_packet;
 188         unsigned char multi_data[6];
 189         struct alps_fields f;
 190         u8 quirks;
 191         struct timer_list timer;
 192 };
 193
 194 #define ALPS_QUIRK_TRACKSTICK_BUTTONS   1 /* trakcstick buttons in trackstick packet */
 195
 196 #ifdef CONFIG_MOUSE_PS2_ALPS
 197 int alps_detect(struct psmouse *psmouse, bool set_properties);
 198 int alps_init(struct psmouse *psmouse);
 199 #else
 200 inline int alps_detect(struct psmouse *psmouse, bool set_properties)
 201 {
 202         return -ENOSYS;
 203 }
 204 inline int alps_init(struct psmouse *psmouse)
 205 {
 206         return -ENOSYS;
 207 }
 208 #endif /* CONFIG_MOUSE_PS2_ALPS */
 209
 210 #endif