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Input: ALPS - document the alps.h data structures

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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>
This commit is contained in:
Kevin Cernekee 2013-02-13 20:55:19 -08:00 committed by Dmitry Torokhov
parent a112e9fdda
commit 88a803482c
1 changed files with 61 additions and 13 deletions
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74
drivers/input/mouse/alps.h
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@ -17,30 +17,78 @@
#define ALPS_PROTO_V3 2
#define ALPS_PROTO_V4 3
/**
* struct alps_model_info - touchpad ID table
* @signature: E7 response string to match.
* @command_mode_resp: For V3/V4 touchpads, the final byte of the EC response
* (aka command mode response) identifies the firmware minor version. This
* can be used to distinguish different hardware models which are not
* uniquely identifiable through their E7 responses.
* @proto_version: Indicates V1/V2/V3/...
* @byte0: Helps figure out whether a position report packet matches the
* known format for this model. The first byte of the report, ANDed with
* mask0, should match byte0.
* @mask0: The mask used to check the first byte of the report.
* @flags: Additional device capabilities (passthrough port, trackstick, etc.).
*
* Many (but not all) ALPS touchpads can be identified by looking at the
* values returned in the "E7 report" and/or the "EC report." This table
* lists a number of such touchpads.
*/
struct alps_model_info {
unsigned char signature[3];
unsigned char command_mode_resp; /* v3/v4 only */
unsigned char signature[3];
unsigned char command_mode_resp;
unsigned char proto_version;
unsigned char byte0, mask0;
unsigned char flags;
unsigned char byte0, mask0;
unsigned char flags;
};
/**
* struct alps_nibble_commands - encodings for register accesses
* @command: PS/2 command used for the nibble
* @data: Data supplied as an argument to the PS/2 command, if applicable
*
* The ALPS protocol uses magic sequences to transmit binary data to the
* touchpad, as it is generally not OK to send arbitrary bytes out the
* PS/2 port. Each of the sequences in this table sends one nibble of the
* register address or (write) data. Different versions of the ALPS protocol
* use slightly different encodings.
*/
struct alps_nibble_commands {
int command;
unsigned char data;
};
/**
* struct alps_data - private data structure for the ALPS driver
* @dev2: "Relative" device used to report trackstick or mouse activity.
* @phys: Physical path for the relative device.
* @i: Information on the detected touchpad model.
* @nibble_commands: Command mapping used for touchpad register accesses.
* @addr_command: Command used to tell the touchpad that a register address
* follows.
* @prev_fin: Finger bit from previous packet.
* @multi_packet: Multi-packet data in progress.
* @multi_data: Saved multi-packet data.
* @x1: First X coordinate from last MT report.
* @x2: Second X coordinate from last MT report.
* @y1: First Y coordinate from last MT report.
* @y2: Second Y coordinate from last MT report.
* @fingers: Number of fingers from last MT report.
* @quirks: Bitmap of ALPS_QUIRK_*.
* @timer: Timer for flushing out the final report packet in the stream.
*/
struct alps_data {
struct input_dev *dev2; /* Relative device */
char phys[32]; /* Phys */
const struct alps_model_info *i;/* Info */
struct input_dev *dev2;
char phys[32];
const struct alps_model_info *i;
const struct alps_nibble_commands *nibble_commands;
int addr_command; /* Command to set register address */
int prev_fin; /* Finger bit from previous packet */
int multi_packet; /* Multi-packet data in progress */
unsigned char multi_data[6]; /* Saved multi-packet data */
int x1, x2, y1, y2; /* Coordinates from last MT report */
int fingers; /* Number of fingers from MT report */
int addr_command;
int prev_fin;
int multi_packet;
unsigned char multi_data[6];
int x1, x2, y1, y2;
int fingers;
u8 quirks;
struct timer_list timer;
};