From 98ab6c7aa650228c433b7f9de65664fca99f3490 Mon Sep 17 00:00:00 2001 From: Giuseppe Bilotta Date: Sat, 28 Sep 2013 16:53:45 +0200 Subject: [PATCH] Initial commit Single device support, some hardcoded paths. --- .gitignore | 2 + Makefile | 5 + gpl-2.0.txt | 339 ++++++++++++++++++++++++++++++++++++ wiimote-pad.c | 474 ++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 820 insertions(+) create mode 100644 .gitignore create mode 100644 Makefile create mode 100644 gpl-2.0.txt create mode 100644 wiimote-pad.c diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ec95114 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +.*.swp +wiimote-pad diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..1484b83 --- /dev/null +++ b/Makefile @@ -0,0 +1,5 @@ +wiimote-pad: wiimote-pad.c + $(CC) -Wall -o $@ $< -I../xwiimote/lib -ludev -lxwiimote + +clean: + @rm -rf wiimote-pad diff --git a/gpl-2.0.txt b/gpl-2.0.txt new file mode 100644 index 0000000..d159169 --- /dev/null +++ b/gpl-2.0.txt @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/wiimote-pad.c b/wiimote-pad.c new file mode 100644 index 0000000..837ef71 --- /dev/null +++ b/wiimote-pad.c @@ -0,0 +1,474 @@ +/* + * Wiimote-Pad + * + * Copyright (C) 2013 Giuseppe Bilotta + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include +#include +#include + +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include + +/* These definitions might be missing from older linux/input.h headers */ +#ifndef BTN_DPAD_LEFT +#define BTN_DPAD_LEFT 0x222 +#endif +#ifndef BTN_DPAD_RIGHT +#define BTN_DPAD_RIGHT 0x223 +#endif +#ifndef BTN_DPAD_UP +#define BTN_DPAD_UP 0x220 +#endif +#ifndef BTN_DPAD_DOWN +#define BTN_DPAD_DOWN 0x221 +#endif + +#define WIIMOTE_PADMODE_VENDOR_ID 0x6181 /* GIuseppe BIlotta */ +#define WIIMOTE_PADMODE_DEVICE_ID 0x3169 /* WIimote GamePad */ + +/* Check if an error \code is negative during \str action */ +void err_check(int code, char const *str) { + if (code < 0) { + int err = errno; + fprintf(stderr, "could not %s (%d): %s\n", + str, err, strerror(err)); + exit(-err); + } +} + +#define BUTTONS do { \ + _BUTTON(XWII_KEY_LEFT, BTN_DPAD_LEFT); \ + _BUTTON(XWII_KEY_RIGHT, BTN_DPAD_RIGHT); \ + _BUTTON(XWII_KEY_UP, BTN_DPAD_UP); \ + _BUTTON(XWII_KEY_DOWN, BTN_DPAD_DOWN); \ + _BUTTON(XWII_KEY_A, BTN_A); \ + _BUTTON(XWII_KEY_B, BTN_B); \ + _BUTTON(XWII_KEY_PLUS, BTN_TL); \ + _BUTTON(XWII_KEY_MINUS, BTN_TR); \ + _BUTTON(XWII_KEY_HOME, BTN_MODE); \ + _BUTTON(XWII_KEY_ONE, BTN_1); \ + _BUTTON(XWII_KEY_TWO, BTN_2); \ +} while (0) + + +struct uinput_user_dev padmode; +/* Room for controller keys and two axes, plus SYN */ +struct input_event iev[XWII_KEY_TWO+2+1+1]; + +/* macros to set evbits and keybits */ +#define set_ev(key) do { \ + ret = ioctl(fd, UI_SET_EVBIT, key); \ + err_check(ret, "set " #key); \ +} while(0) + +#define set_key(key) do { \ + ret = ioctl(fd, UI_SET_KEYBIT, key); \ + err_check(ret, "set " #key); \ +} while(0) + +#define set_abs(key, min, max, fuzz, flat) do { \ + ret = ioctl(fd, UI_SET_ABSBIT, key); \ + err_check(ret, "set " #key); \ + padmode.absmin[key] = min; \ + padmode.absmax[key] = max; \ + padmode.absfuzz[key] = fuzz; \ + padmode.absflat[key] = flat; \ +} while(0) + +#define AXIS_MAX 100 + +struct wiimote_dev { + const char *device; + char *root; + + int dev_id; + + int uinput; + + struct xwii_iface *iface; + unsigned int ifs; + int fd; +}; + +#define MAX_WIIMOTES 1 +struct wiimote_dev dev[MAX_WIIMOTES]; + +void dev_init(struct wiimote_dev const *dev) { + int ret; + int fd = dev->uinput; + +#define _BUTTON(n, bt) do { \ + set_key(bt); \ + iev[n].type = EV_KEY; \ + iev[n].code = bt; \ +} while (0) + set_ev(EV_KEY); + BUTTONS; + set_ev(EV_SYN); +#undef _BUTTON + + set_ev(EV_ABS); + set_abs(ABS_X, -AXIS_MAX, AXIS_MAX, 2, 4); + iev[11].type = EV_ABS; + iev[11].code = ABS_X; + set_abs(ABS_Y, -AXIS_MAX, AXIS_MAX, 2, 4); + iev[12].type = EV_ABS; + iev[12].code = ABS_Y; + + iev[13].type = EV_SYN; + iev[13].code = iev[13].value = 0; + + snprintf(padmode.name, UINPUT_MAX_NAME_SIZE, XWII_NAME_CORE " in gamepad mode"); + padmode.id.bustype = BUS_VIRTUAL; + /* + padmode.id.vendor = 0; + padmode.id.product = 0; + padmode.id.version = 0; + */ + + ret = write(fd, &padmode, sizeof(padmode)); + err_check(ret, "set dev properties"); + ret = ioctl(fd, UI_DEV_CREATE); + err_check(ret, "create device"); +} + + +static int wiimote_refresh(struct wiimote_dev *dev) +{ + puts("Refreshing\n"); + return xwii_iface_open(dev->iface, dev->ifs); +} + +static void wiimote_key(struct wiimote_dev *dev, struct xwii_event const *ev) +{ + unsigned int code; + unsigned int state; + + code = ev->v.key.code; + state = ev->v.key.state; + + if (code > XWII_KEY_TWO) + return; + if (state > 1) + return; + iev[code].value = state; + + if (dev->uinput > 0) { + int ret = write(dev->uinput, iev + code, sizeof(*iev)); + err_check(ret, "report button"); + ret = write(dev->uinput, iev + 13, sizeof(*iev)); + err_check(ret, "report btn SYN"); + } else { + fputs("nowhere to report butto presses to\n", stderr); + } +} + +#define CLIP_AXIS(val) do { \ + if (val < -AXIS_MAX) \ + val = -AXIS_MAX; \ + if (val > AXIS_MAX) \ + val = AXIS_MAX; \ +} while (0) + + +static void wiimote_accel(struct wiimote_dev *dev, struct xwii_event const *ev) +{ + iev[11].value = -(ev->v.abs[0].y); + iev[12].value = ev->v.abs[0].x; + + CLIP_AXIS(iev[11].value); + CLIP_AXIS(iev[12].value); + + if (dev->uinput > 0) { + int ret = write(dev->uinput, iev + 11, sizeof(*iev)); + err_check(ret, "report accel X"); + ret = write(dev->uinput, iev + 12, sizeof(*iev)); + err_check(ret, "report accel Y"); + ret = write(dev->uinput, iev + 13, sizeof(*iev)); + err_check(ret, "report accel SYN"); +#if 0 + printf("reported J (%d, %d) from ev (%d, %d)\n", + iev[11].value, iev[12].value, + -(ev->v.abs[0].y), ev->v.abs[0].x); +#endif + } else { + fputs("nowhere to report accel to\n", stderr); + } +} + +static int wiimote_poll(struct wiimote_dev *dev) +{ + struct xwii_event ev; + int ret; + + do { + memset(&ev, 0, sizeof(ev)); + ret = xwii_iface_dispatch(dev->iface, &ev, sizeof(ev)); + + if (ret) + break; + + switch (ev.type) { + case XWII_EVENT_WATCH: + ret = wiimote_refresh(dev); + break; + case XWII_EVENT_KEY: + wiimote_key(dev, &ev); + break; + case XWII_EVENT_ACCEL: + wiimote_accel(dev, &ev); + break; + default: + printf("Unhandled Wiimote event type %d\n", ev.type); + } + } while (!ret); + + if (ret == -EAGAIN) { + ret = 0; + } + + return ret; +} + +int dev_create(struct wiimote_dev *dev) { + int ret = 0; + struct udev *udev; + struct udev_device *d, *p; + struct stat st; + const char *root, *snum, *driver, *subs; + int num; + + if (!dev->device) { + ret = EINVAL; + goto exit; + } + + if (stat(dev->device, &st)) { + ret = errno; + goto exit; + } + + udev = udev_new(); + if (!udev) { + fputs("could not connect to udev\n", stderr); + ret = errno; + goto exit; + } + + d = udev_device_new_from_devnum(udev, 'c', st.st_rdev); + if (!d) { + fputs("could not find udev device\n", stderr); + ret = errno; + goto exit_udev; + } + + p = udev_device_get_parent_with_subsystem_devtype(d, "hid", NULL); + if (!p) { + fputs("could not find parent HID device\n", stderr); + ret = errno; + goto exit_dev; + } + + driver = udev_device_get_driver(p); + subs = udev_device_get_subsystem(p); + if (!driver || strcmp(driver, "wiimote") || !subs || strcmp(subs, "hid")) { + fputs("parent is not a HID Wiimote\n", stderr); + ret = errno; + goto exit_dev; + } + + root = udev_device_get_syspath(p); + snum = udev_device_get_sysname(p); + snum = snum ? strchr(snum, '.') : NULL; + if (!root || !snum) { + fputs("Could not get root path\n", stderr); + ret = errno; + goto exit_dev; + } + + num = strtol(&snum[1], NULL, 16); + if (num < 0) { + fputs("Negative device number!\n", stderr); + ret = errno; + goto exit_dev; + } + dev->dev_id = num; + + dev->root = strdup(root); + if (!dev->root) { + fputs("Could not set device root\n", stderr); + ret = errno; + goto exit_dev; + } + + printf("using device %d from root %s for %s\n", + dev->dev_id, dev->root, dev->device); + + dev->ifs = XWII_IFACE_CORE | XWII_IFACE_ACCEL; + ret = xwii_iface_new(&dev->iface, dev->root); + if (ret) { + fputs("Could not create xwiimote interface\n", stderr); + ret = errno; + goto exit_wii; + } + + ret = xwii_iface_open(dev->iface, dev->ifs); + if (ret) { + fputs("Could not open xwiimote interface\n", stderr); + ret = errno; + goto exit_wii; + } + if (xwii_iface_opened(dev->iface) != dev->ifs) { + fputs("Some interfaces failed to open\n", stderr); + ret = errno; + goto exit_wii; + } + + dev->fd = xwii_iface_get_fd(dev->iface); + + goto exit_dev; + +exit_wii: + free(dev->root); + dev->root = NULL; + +exit_dev: + udev_device_unref(d); +exit_udev: + udev_unref(udev); +exit: + return ret; +} + +static void dev_destroy(struct wiimote_dev *dev) { + if (dev->root) { + xwii_iface_unref(dev->iface); + free(dev->root); + dev->root = NULL; + } + if (dev->uinput > 0) { + ioctl(dev->uinput, UI_DEV_DESTROY); + close(dev->uinput); + } + printf("deassociated from device %s\n", dev->device); +} + +glob_t js_devs; + +static void destroy_all_devs(void) { +#if MAX_WIIMOTES > 1 +#error "destroy_all_devs only works for a single device" +#endif + dev_destroy(dev); + globfree(&js_devs); +} + +static int last_signal; + +static void sig_exit(int _signal) { + last_signal = _signal; + printf("Interrupted by signal %d\n", last_signal); +} + +struct timeval no_wait; + +const char uinput_path[] = "/dev/uinput"; + +const char js_glob[] = "/dev/input/js*"; + +int main(int argc, char *argv[]) { + int ret; + size_t j; + fd_set fds[1]; + + atexit(destroy_all_devs); + signal(SIGINT, sig_exit); + + if (argc > 1) { + dev->device = argv[1]; + ret = dev_create(dev); + + if (ret) { + fprintf(stderr, "could not %s (%d): %s\n", + "associate", ret, strerror(ret)); + return ret; + } + } else { + /* No device specified. Since the Linux kernel exposes the + * controller also as a joystick (without axes), we peek at + * all available joysticks looking for one which is a Wiimote + */ + + switch (glob(js_glob, GLOB_NOSORT, NULL, &js_devs)) { + case GLOB_ABORTED: + case GLOB_NOMATCH: + case GLOB_NOSPACE: + fputs("no joysticks found\n", stderr); + exit(ENODEV); + } + + for (j = 0; j < js_devs.gl_pathc; ++j) { + dev->device = js_devs.gl_pathv[j]; + ret = dev_create(dev); + if (!ret) + break; /* found */ + printf("skipping %s (%d): %s\n", + dev->device, ret, strerror(ret)); + dev->device = NULL; + } + if (!dev->device) { + fputs("no wiimote found\n", stderr); + exit(ENODEV); + } + } + + dev->uinput = open(uinput_path, O_WRONLY | O_NONBLOCK); + err_check(dev->uinput, "open uinput"); + + dev_init(dev); + + do { + memset(&no_wait, 0, sizeof(no_wait)); + FD_ZERO(fds); + FD_SET(dev->fd, fds); + + if (last_signal) + break; + ret = select(dev->fd + 1, fds, NULL, NULL, NULL); + err_check(ret, "poll wiimote fd"); + if (ret > 0) { + ret = wiimote_poll(dev); + err_check(ret, "process wiimote data"); + } + } while (1); + + return ret; +} + -- 2.32.0.93.g670b81a890