uinput-mapper/custom_map.h

/*
 * Copyright Merlijn Wajer 2012
 *
 * This is the uinput-mapper configuration file.
 *
 * We are still working out all the details, but it basically boils down to the
 * following: You write the configuration entirely in the C preprocessor by
 * adding the right commands (macros) to the right sections.
 *
 *
 * As of now, there are three sections:
 *
 * - GLOBAL_MAP;
 *   This is where you set the amount of devices to be emulated (currently
 *   called JOYCOUNT) and the INPUT_PATH.
 *
 * - CONFIGURE_JOYSTICKS:
 *   This is where you tell uinput-mapper what buttons your new joysticks (or
 *   other devices) should expose. Any button not exposed here will never be
 *   send.
 *
 *   Macros that make sense to use here:
 *   - JOYSTICK_ADD_KEY(<key>, <bit to set>, <device>)
 *   - JOYSTICK_SET_LIM(<absmin|absmax>, <value>, <key>)
 *
 *   JOYSTICK_SET_LIM is mostly used for ABS_HATs.
 *
 * - JOYMAP:
 *
 *   Set the key mappings here.
 *
 *   Macros that make sense here:
 *   - KEYMAP(<in_key>, <out_key>, <out_type>, <device>, <val>)
 *
 * ----------------------------------------------------------------------------
 *
 * TODO:
 * - For KEYMAPs, add parameter that species the INPUT_PATH to map from
 * - Add support for multiple INPUT_PATH
 * - Figure out more details. There's probably a lot missing.
 * - Remove EV_KEY constraint in map.c and use it as arg to KEY_MAP
 *
 * ----------------------------------------------------------------------------
 */

/* -------------------------------------------------------------------------- */
/* ----------------------------- FIRST SECTION ----------------------------- */
/* -------------------------------------------------------------------------- */

#ifndef H_GLOBAL_MAP
#define H_GLOBAL_MAP

/* Set up amount of joysticks here */
#define JOYCOUNT 2

/* Set up event to read from */
#define INPUT_PATH "/dev/input/by-path/platform-i8042-serio-0-event-kbd"

#endif

/* -------------------------------------------------------------------------- */
/* ----------------------------- SECOND SECTION ----------------------------- */
/* -------------------------------------------------------------------------- */

#ifdef H_CONFIGURE_JOYSTICKS
#ifndef H_CONFIGURE_JOYSTICKS_SEEN
#define H_CONFIGURE_JOYSTICKS_SEEN

#define JOYSTICK_ADD_KEY(key, bit, device) \
    if (device == j) { \
        if(ioctl(js[device], bit, key) < 0) { \
            perror("Error in JOYSTICK_ADD_KEY"); \
            fprintf(stderr, "ERROR: JOYSTICK_ADD_KEY for device %d, key %s, bit: %s\n", device, #key, #bit); \
            return 1; \
        } else { \
            printf("JOYSTICK_ADD_KEY for device %d, key %s, bit: %s\n", device, #key, #bit); \
        } \
    }


#define JOYSTICK_SET_LIM(lim, val, key) \
    uidev.lim[key] = val;

/* Configure first joystick.
 *
 * Here we just tell the program what keys we want to use.
 * If a key is not enabled here, it will never be passed.
 */

/* Hats:
 * We set the absmax and absmin; otherwise the hats make no sense.
 */
JOYSTICK_ADD_KEY(ABS_HAT0X, UI_SET_ABSBIT, 0)
JOYSTICK_SET_LIM(absmax, 1, ABS_HAT0X)
JOYSTICK_SET_LIM(absmin, -1, ABS_HAT0X)
JOYSTICK_ADD_KEY(ABS_HAT0Y, UI_SET_ABSBIT, 0)
JOYSTICK_SET_LIM(absmax, 1, ABS_HAT0Y)
JOYSTICK_SET_LIM(absmin, -1, ABS_HAT0Y)

/* XXX: ALWAYS SET BTN_JOYSTICK TO EXPOSE A JOYSTICK EVENT */
JOYSTICK_ADD_KEY(BTN_JOYSTICK, UI_SET_KEYBIT, 0)

/* Buttons. */
JOYSTICK_ADD_KEY(BTN_0, UI_SET_KEYBIT, 0)
JOYSTICK_ADD_KEY(BTN_1, UI_SET_KEYBIT, 0)
JOYSTICK_ADD_KEY(BTN_2, UI_SET_KEYBIT, 0)
JOYSTICK_ADD_KEY(BTN_3, UI_SET_KEYBIT, 0)

/* Second joystick ; same comments as first one */
JOYSTICK_ADD_KEY(ABS_HAT0X, UI_SET_ABSBIT, 1)
JOYSTICK_SET_LIM(absmax, 1, ABS_HAT0X)
JOYSTICK_SET_LIM(absmin, -1, ABS_HAT0X)

JOYSTICK_ADD_KEY(ABS_HAT0Y, UI_SET_ABSBIT, 1)
JOYSTICK_SET_LIM(absmax, 1, ABS_HAT0X)
JOYSTICK_SET_LIM(absmin, -1, ABS_HAT0X)

JOYSTICK_ADD_KEY(BTN_JOYSTICK, UI_SET_KEYBIT, 1)

JOYSTICK_ADD_KEY(BTN_0, UI_SET_KEYBIT, 1)
JOYSTICK_ADD_KEY(BTN_1, UI_SET_KEYBIT, 1)
JOYSTICK_ADD_KEY(BTN_2, UI_SET_KEYBIT, 1)
JOYSTICK_ADD_KEY(BTN_3, UI_SET_KEYBIT, 1)
#endif
#endif

/* -------------------------------------------------------------------------- */
/* ----------------------------- THIRD SECTION ----------------------------- */
/* -------------------------------------------------------------------------- */

#ifdef H_JOYMAP
#ifndef H_JOYMAP_SEEN
#define H_JOYMAP_SEEN
#define KEYMAP(in_key, out_key, out_type, device, val) \
    case in_key: \
        je.type = out_type; \
        je.code = out_key; \
        je.value = val(e.value); \
        j = device; \
        break;

/* First joystick */

/* HAT */
KEYMAP(KEY_UP, ABS_HAT0Y, EV_ABS, 0, -)
KEYMAP(KEY_DOWN, ABS_HAT0Y, EV_ABS, 0, +)
KEYMAP(KEY_LEFT, ABS_HAT0X, EV_ABS, 0, -)
KEYMAP(KEY_RIGHT, ABS_HAT0X, EV_ABS, 0, +)

/* Red buttons */
KEYMAP(KEY_LEFTCTRL, BTN_0, EV_KEY, 0, +)
KEYMAP(KEY_LEFTALT, BTN_1, EV_KEY, 0, +)
KEYMAP(KEY_SPACE, BTN_2, EV_KEY, 0, +)

/* Yellow button */
KEYMAP(KEY_1, BTN_3, EV_KEY, 0, +)

/* Second joystick */

/* HAT */
KEYMAP(KEY_R, ABS_HAT0Y, EV_ABS, 1, -)
KEYMAP(KEY_F, ABS_HAT0Y, EV_ABS, 1, +)
KEYMAP(KEY_D, ABS_HAT0X, EV_ABS, 1, -)
KEYMAP(KEY_G, ABS_HAT0X, EV_ABS, 1, +)

/* Red buttons */
KEYMAP(KEY_A, BTN_0, EV_KEY, 1, +)
KEYMAP(KEY_S, BTN_1, EV_KEY, 1, +)
KEYMAP(KEY_Q, BTN_2, EV_KEY, 1, +)

/* Yellow button */
KEYMAP(KEY_2, BTN_3, EV_KEY, 1, +)

#endif
#endif