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Input: ALPS - document the alps.h data structures
Add kernel-doc markup. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Tested-by: Dave Turvene <dturvene@dahetral.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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1 changed files with 61 additions and 13 deletions
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#define ALPS_PROTO_V3 2
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#define ALPS_PROTO_V3 2
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#define ALPS_PROTO_V4 3
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#define ALPS_PROTO_V4 3
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/**
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* struct alps_model_info - touchpad ID table
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* @signature: E7 response string to match.
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* @command_mode_resp: For V3/V4 touchpads, the final byte of the EC response
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* (aka command mode response) identifies the firmware minor version. This
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* can be used to distinguish different hardware models which are not
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* uniquely identifiable through their E7 responses.
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* @proto_version: Indicates V1/V2/V3/...
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* @byte0: Helps figure out whether a position report packet matches the
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* known format for this model. The first byte of the report, ANDed with
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* mask0, should match byte0.
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* @mask0: The mask used to check the first byte of the report.
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* @flags: Additional device capabilities (passthrough port, trackstick, etc.).
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*
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* Many (but not all) ALPS touchpads can be identified by looking at the
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* values returned in the "E7 report" and/or the "EC report." This table
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* lists a number of such touchpads.
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*/
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struct alps_model_info {
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struct alps_model_info {
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unsigned char signature[3];
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unsigned char signature[3];
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unsigned char command_mode_resp; /* v3/v4 only */
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unsigned char command_mode_resp;
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unsigned char proto_version;
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unsigned char proto_version;
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unsigned char byte0, mask0;
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unsigned char byte0, mask0;
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unsigned char flags;
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unsigned char flags;
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};
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};
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/**
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* struct alps_nibble_commands - encodings for register accesses
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* @command: PS/2 command used for the nibble
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* @data: Data supplied as an argument to the PS/2 command, if applicable
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*
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* The ALPS protocol uses magic sequences to transmit binary data to the
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* touchpad, as it is generally not OK to send arbitrary bytes out the
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* PS/2 port. Each of the sequences in this table sends one nibble of the
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* register address or (write) data. Different versions of the ALPS protocol
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* use slightly different encodings.
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*/
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struct alps_nibble_commands {
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struct alps_nibble_commands {
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int command;
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int command;
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unsigned char data;
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unsigned char data;
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};
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};
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/**
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* struct alps_data - private data structure for the ALPS driver
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* @dev2: "Relative" device used to report trackstick or mouse activity.
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* @phys: Physical path for the relative device.
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* @i: Information on the detected touchpad model.
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* @nibble_commands: Command mapping used for touchpad register accesses.
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* @addr_command: Command used to tell the touchpad that a register address
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* follows.
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* @prev_fin: Finger bit from previous packet.
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* @multi_packet: Multi-packet data in progress.
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* @multi_data: Saved multi-packet data.
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* @x1: First X coordinate from last MT report.
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* @x2: Second X coordinate from last MT report.
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* @y1: First Y coordinate from last MT report.
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* @y2: Second Y coordinate from last MT report.
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* @fingers: Number of fingers from last MT report.
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* @quirks: Bitmap of ALPS_QUIRK_*.
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* @timer: Timer for flushing out the final report packet in the stream.
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*/
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struct alps_data {
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struct alps_data {
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struct input_dev *dev2; /* Relative device */
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struct input_dev *dev2;
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char phys[32]; /* Phys */
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char phys[32];
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const struct alps_model_info *i;/* Info */
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const struct alps_model_info *i;
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const struct alps_nibble_commands *nibble_commands;
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const struct alps_nibble_commands *nibble_commands;
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int addr_command; /* Command to set register address */
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int addr_command;
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int prev_fin; /* Finger bit from previous packet */
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int prev_fin;
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int multi_packet; /* Multi-packet data in progress */
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int multi_packet;
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unsigned char multi_data[6]; /* Saved multi-packet data */
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unsigned char multi_data[6];
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int x1, x2, y1, y2; /* Coordinates from last MT report */
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int x1, x2, y1, y2;
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int fingers; /* Number of fingers from MT report */
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int fingers;
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u8 quirks;
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u8 quirks;
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struct timer_list timer;
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struct timer_list timer;
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};
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};
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