linux/drivers/input/joystick/gf2k.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 1998-2001 Vojtech Pavlik
 */

/*
 * Genius Flight 2000 joystick driver for Linux
 */

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

#define DRIVER_DESC …

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

#define GF2K_START …
#define GF2K_STROBE …
#define GF2K_TIMEOUT …
#define GF2K_LENGTH …

/*
 * Genius joystick ids ...
 */

#define GF2K_ID_G09 …
#define GF2K_ID_F30D …
#define GF2K_ID_F30 …
#define GF2K_ID_F31D …
#define GF2K_ID_F305 …
#define GF2K_ID_F23P …
#define GF2K_ID_F31 …
#define GF2K_ID_MAX …

static char gf2k_length[] = …;
static char gf2k_hat_to_axis[][2] = …;

static char *gf2k_names[] = …;
static unsigned char gf2k_hats[] = …;
static unsigned char gf2k_axes[] = …;
static unsigned char gf2k_joys[] = …;
static unsigned char gf2k_pads[] = …;
static unsigned char gf2k_lens[] = …;

static unsigned char gf2k_abs[] = …;
static short gf2k_btn_joy[] = …;
static short gf2k_btn_pad[] = …;


static short gf2k_seq_reset[] = …;
static short gf2k_seq_digital[] = …;

struct gf2k { … };

/*
 * gf2k_read_packet() reads a Genius Flight2000 packet.
 */

static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
{ … }

/*
 * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
 * into digital mode.
 */

static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
{ … }

/*
 * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
 * is number of bits per triplet.
 */

#define GB(p,n,s) …

static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
{ … }

static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
{ … }

/*
 * gf2k_poll() reads and analyzes Genius joystick data.
 */

static void gf2k_poll(struct gameport *gameport)
{ … }

static int gf2k_open(struct input_dev *dev)
{ … }

static void gf2k_close(struct input_dev *dev)
{ … }

/*
 * gf2k_connect() probes for Genius id joysticks.
 */

static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
{ … }

static void gf2k_disconnect(struct gameport *gameport)
{ … }

static struct gameport_driver gf2k_drv = …;

module_gameport_driver(…) …;