linux/drivers/input/joystick/analog.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 1996-2001 Vojtech Pavlik
 */

/*
 * Analog joystick and gamepad driver for Linux
 */

#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/gameport.h>
#include <linux/jiffies.h>
#include <linux/seq_buf.h>
#include <linux/timex.h>
#include <linux/timekeeping.h>

#define DRIVER_DESC …

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

/*
 * Option parsing.
 */

#define ANALOG_PORTS …

static char *js[ANALOG_PORTS];
static unsigned int js_nargs;
static int analog_options[ANALOG_PORTS];
module_param_array_named(…);
MODULE_PARM_DESC(…) …;

/*
 * Times, feature definitions.
 */

#define ANALOG_RUDDER …
#define ANALOG_THROTTLE …
#define ANALOG_AXES_STD …
#define ANALOG_BTNS_STD …

#define ANALOG_BTNS_CHF …
#define ANALOG_HAT1_CHF …
#define ANALOG_HAT2_CHF …
#define ANALOG_HAT_FCS …
#define ANALOG_HATS_ALL …
#define ANALOG_BTN_TL …
#define ANALOG_BTN_TR …
#define ANALOG_BTN_TL2 …
#define ANALOG_BTN_TR2 …
#define ANALOG_BTNS_TLR …
#define ANALOG_BTNS_TLR2 …
#define ANALOG_BTNS_GAMEPAD …

#define ANALOG_HBTN_CHF …
#define ANALOG_ANY_CHF …
#define ANALOG_SAITEK …
#define ANALOG_EXTENSIONS …
#define ANALOG_GAMEPAD …

#define ANALOG_MAX_TIME …
#define ANALOG_LOOP_TIME …
#define ANALOG_SAITEK_DELAY …
#define ANALOG_SAITEK_TIME …
#define ANALOG_AXIS_TIME …
#define ANALOG_INIT_RETRIES …
#define ANALOG_FUZZ_BITS …
#define ANALOG_FUZZ_MAGIC …

#define ANALOG_MAX_NAME_LENGTH …
#define ANALOG_MAX_PHYS_LENGTH …

static short analog_axes[] = …;
static short analog_hats[] = …;
static short analog_pads[] = …;
static short analog_exts[] = …;
static short analog_pad_btn[] = …;
static short analog_joy_btn[] = …;

static unsigned char analog_chf[] = …;

struct analog { … };

struct analog_port { … };

/*
 * analog_decode() decodes analog joystick data and reports input events.
 */

static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
{ … }

/*
 * analog_cooked_read() reads analog joystick data.
 */

static int analog_cooked_read(struct analog_port *port)
{ … }

static int analog_button_read(struct analog_port *port, char saitek, char chf)
{ … }

/*
 * analog_poll() repeatedly polls the Analog joysticks.
 */

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

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

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

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

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

/*
 * analog_calibrate_timer() calibrates the timer and computes loop
 * and timeout values for a joystick port.
 */

static void analog_calibrate_timer(struct analog_port *port)
{ … }

/*
 * analog_name() constructs a name for an analog joystick.
 */

static void analog_name(struct analog *analog)
{ … }

/*
 * analog_init_device()
 */

static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
{ … }

/*
 * analog_init_devices() sets up device-specific values and registers the input devices.
 */

static int analog_init_masks(struct analog_port *port)
{ … }

static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
{ … }

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

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

struct analog_types { … };

static struct analog_types analog_types[] = …;

static void analog_parse_options(void)
{ … }

/*
 * The gameport device structure.
 */

static struct gameport_driver analog_drv = …;

static int __init analog_init(void)
{ … }

static void __exit analog_exit(void)
{ … }

module_init(…) …;
module_exit(analog_exit);