linux/drivers/input/joystick/adi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 1998-2005 Vojtech Pavlik
 */

/*
 * Logitech ADI joystick family driver for Linux
 */

#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/gameport.h>
#include <linux/jiffies.h>

#define DRIVER_DESC …

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…);
MODULE_LICENSE(…) …;

/*
 * Times, array sizes, flags, ids.
 */

#define ADI_MAX_START …
#define ADI_MAX_STROBE …
#define ADI_INIT_DELAY …
#define ADI_DATA_DELAY …

#define ADI_MAX_LENGTH …
#define ADI_MIN_LENGTH …
#define ADI_MIN_LEN_LENGTH …
#define ADI_MIN_ID_LENGTH …
#define ADI_MAX_NAME_LENGTH …
#define ADI_MAX_CNAME_LENGTH …
#define ADI_MAX_PHYS_LENGTH …

#define ADI_FLAG_HAT …
#define ADI_FLAG_10BIT …

#define ADI_ID_TPD …
#define ADI_ID_WGP …
#define ADI_ID_WGPE …
#define ADI_ID_MAX …

/*
 * Names, buttons, axes ...
 */

static char *adi_names[] = …;

static char adi_wmgpe_abs[] = …;
static char adi_wmi_abs[] = …;
static char adi_wmed3d_abs[] = …;
static char adi_cm2_abs[] = …;
static char adi_wmf_abs[] = …;

static short adi_wmgpe_key[] = …;
static short adi_wmi_key[] = …;
static short adi_wmed3d_key[] = …;
static short adi_cm2_key[] = …;

static char* adi_abs[] = …;

static short* adi_key[] = …;

/*
 * Hat to axis conversion arrays.
 */

static struct { … } adi_hat_to_axis[] = …;

/*
 * Per-port information.
 */

struct adi { … };

struct adi_port { … };

/*
 * adi_read_packet() reads a Logitech ADI packet.
 */

static void adi_read_packet(struct adi_port *port)
{ … }

/*
 * adi_move_bits() detects a possible 2-stream mode, and moves
 * the bits accordingly.
 */

static void adi_move_bits(struct adi_port *port, int length)
{ … }

/*
 * adi_get_bits() gathers bits from the data packet.
 */

static inline int adi_get_bits(struct adi *adi, int count)
{ … }

/*
 * adi_decode() decodes Logitech joystick data into input events.
 */

static int adi_decode(struct adi *adi)
{ … }

/*
 * adi_read() reads the data packet and decodes it.
 */

static int adi_read(struct adi_port *port)
{ … }

/*
 * adi_poll() repeatedly polls the Logitech joysticks.
 */

static void adi_poll(struct gameport *gameport)
{ … }

/*
 * adi_open() is a callback from the input open routine.
 */

static int adi_open(struct input_dev *dev)
{ … }

/*
 * adi_close() is a callback from the input close routine.
 */

static void adi_close(struct input_dev *dev)
{ … }

/*
 * adi_init_digital() sends a trigger & delay sequence
 * to reset and initialize a Logitech joystick into digital mode.
 */

static void adi_init_digital(struct gameport *gameport)
{ … }

static void adi_id_decode(struct adi *adi, struct adi_port *port)
{ … }

static int adi_init_input(struct adi *adi, struct adi_port *port, int half)
{ … }

static void adi_init_center(struct adi *adi)
{ … }

/*
 * adi_connect() probes for Logitech ADI joysticks.
 */

static int adi_connect(struct gameport *gameport, struct gameport_driver *drv)
{ … }

static void adi_disconnect(struct gameport *gameport)
{ … }

static struct gameport_driver adi_drv = …;

module_gameport_driver(…) …;