SDL/src/joystick/bsd/SDL_bsdjoystick.c

/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"

#ifdef SDL_JOYSTICK_USBHID

/*
 * Joystick driver for the uhid(4) / ujoy(4) interface found in OpenBSD,
 * NetBSD and FreeBSD.
 *
 * Maintainer: <vedge at csoft.org>
 */

#include <sys/param.h>
#include <sys/stat.h>

#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

#ifndef __FreeBSD_kernel_version
#define __FreeBSD_kernel_version __FreeBSD_version
#endif

#if defined(HAVE_USB_H)
#include <usb.h>
#endif
#ifdef __DragonFly__
#include <bus/u4b/usb.h>
#include <bus/u4b/usbhid.h>
#else
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#endif

#if defined(HAVE_USBHID_H)
#include <usbhid.h>
#elif defined(HAVE_LIBUSB_H)
#include <libusb.h>
#elif defined(HAVE_LIBUSBHID_H)
#include <libusbhid.h>
#endif

#if defined(__FREEBSD__) || defined(__FreeBSD_kernel__)
#include <osreldate.h>
#if __FreeBSD_kernel_version > 800063
#include <dev/usb/usb_ioctl.h>
#elif defined(__DragonFly__)
#include <bus/u4b/usb_ioctl.h>
#endif
#include <sys/joystick.h>
#endif

#if SDL_HAVE_MACHINE_JOYSTICK_H
#include <machine/joystick.h>
#endif

#include "SDL_joystick.h"
#include "../SDL_sysjoystick.h"
#include "../SDL_joystick_c.h"
#include "../hidapi/SDL_hidapijoystick_c.h"

#if defined(__FREEBSD__) || SDL_HAVE_MACHINE_JOYSTICK_H || defined(__FreeBSD_kernel__) || defined(__DragonFly_)
#define SUPPORT_JOY_GAMEPORT
#endif

#define MAX_UHID_JOYS 64
#define MAX_JOY_JOYS  2
#define MAX_JOYS      (MAX_UHID_JOYS + MAX_JOY_JOYS)

#ifdef __OpenBSD__

#define HUG_DPAD_UP    0x90
#define HUG_DPAD_DOWN  0x91
#define HUG_DPAD_RIGHT 0x92
#define HUG_DPAD_LEFT  0x93

#define HAT_CENTERED  0x00
#define HAT_UP        0x01
#define HAT_RIGHT     0x02
#define HAT_DOWN      0x04
#define HAT_LEFT      0x08
#define HAT_RIGHTUP   (HAT_RIGHT | HAT_UP)
#define HAT_RIGHTDOWN (HAT_RIGHT | HAT_DOWN)
#define HAT_LEFTUP    (HAT_LEFT | HAT_UP)
#define HAT_LEFTDOWN  (HAT_LEFT | HAT_DOWN)

/* calculate the value from the state of the dpad */
int dpad_to_sdl(Sint32 *dpad)
{
    if (dpad[2]) {
        if (dpad[0])
            return HAT_RIGHTUP;
        else if (dpad[1])
            return HAT_RIGHTDOWN;
        else
            return HAT_RIGHT;
    } else if (dpad[3]) {
        if (dpad[0])
            return HAT_LEFTUP;
        else if (dpad[1])
            return HAT_LEFTDOWN;
        else
            return HAT_LEFT;
    } else if (dpad[0]) {
        return HAT_UP;
    } else if (dpad[1]) {
        return HAT_DOWN;
    }
    return HAT_CENTERED;
}
#endif

struct report
{
#if defined(__FREEBSD__) && (__FreeBSD_kernel_version > 900000) || \
    defined(__DragonFly__)
    void *buf; /* Buffer */
#elif defined(__FREEBSD__) && (__FreeBSD_kernel_version > 800063)
    struct usb_gen_descriptor *buf; /* Buffer */
#else
    struct usb_ctl_report *buf; /* Buffer */
#endif
    size_t size; /* Buffer size */
    int rid;     /* Report ID */
    enum
    {
        SREPORT_UNINIT,
        SREPORT_CLEAN,
        SREPORT_DIRTY
    } status;
};

static struct
{
    int uhid_report;
    hid_kind_t kind;
    const char *name;
} const repinfo[] = {
    { UHID_INPUT_REPORT, hid_input, "input" },
    { UHID_OUTPUT_REPORT, hid_output, "output" },
    { UHID_FEATURE_REPORT, hid_feature, "feature" }
};

enum
{
    REPORT_INPUT = 0,
    REPORT_OUTPUT = 1,
    REPORT_FEATURE = 2
};

enum
{
    JOYAXE_X,
    JOYAXE_Y,
    JOYAXE_Z,
    JOYAXE_SLIDER,
    JOYAXE_WHEEL,
    JOYAXE_RX,
    JOYAXE_RY,
    JOYAXE_RZ,
    JOYAXE_count
};

struct joystick_hwdata
{
    int fd;
    enum
    {
        BSDJOY_UHID, /* uhid(4) */
        BSDJOY_JOY   /* joy(4) */
    } type;

    int naxes;
    int nbuttons;
    int nhats;
    struct report_desc *repdesc;
    struct report inreport;
    int axis_map[JOYAXE_count]; /* map present JOYAXE_* to 0,1,.. */
};

/* A linked list of available joysticks */
typedef struct SDL_joylist_item
{
    SDL_JoystickID device_instance;
    char *path; /* "/dev/uhid0" or whatever */
    char *name; /* "SideWinder 3D Pro" or whatever */
    SDL_JoystickGUID guid;
    dev_t devnum;
    struct SDL_joylist_item *next;
} SDL_joylist_item;

static SDL_joylist_item *SDL_joylist = NULL;
static SDL_joylist_item *SDL_joylist_tail = NULL;
static int numjoysticks = 0;

static int report_alloc(struct report *, struct report_desc *, int);
static void report_free(struct report *);

#if defined(USBHID_UCR_DATA) || (defined(__FreeBSD_kernel__) && __FreeBSD_kernel_version <= 800063)
#define REP_BUF_DATA(rep) ((rep)->buf->ucr_data)
#elif (defined(__FREEBSD__) && (__FreeBSD_kernel_version > 900000)) || \
    defined(__DragonFly__)
#define REP_BUF_DATA(rep) ((rep)->buf)
#elif (defined(__FREEBSD__) && (__FreeBSD_kernel_version > 800063))
#define REP_BUF_DATA(rep) ((rep)->buf->ugd_data)
#else
#define REP_BUF_DATA(rep) ((rep)->buf->data)
#endif

static int usage_to_joyaxe(int usage)
{
    int joyaxe;
    switch (usage) {
    case HUG_X:
        joyaxe = JOYAXE_X;
        break;
    case HUG_Y:
        joyaxe = JOYAXE_Y;
        break;
    case HUG_Z:
        joyaxe = JOYAXE_Z;
        break;
    case HUG_SLIDER:
        joyaxe = JOYAXE_SLIDER;
        break;
    case HUG_WHEEL:
        joyaxe = JOYAXE_WHEEL;
        break;
    case HUG_RX:
        joyaxe = JOYAXE_RX;
        break;
    case HUG_RY:
        joyaxe = JOYAXE_RY;
        break;
    case HUG_RZ:
        joyaxe = JOYAXE_RZ;
        break;
    default:
        joyaxe = -1;
    }
    return joyaxe;
}

static void FreeJoylistItem(SDL_joylist_item *item)
{
    SDL_free(item->path);
    SDL_free(item->name);
    SDL_free(item);
}

static void FreeHwData(struct joystick_hwdata *hw)
{
    if (hw->type == BSDJOY_UHID) {
        report_free(&hw->inreport);

        if (hw->repdesc) {
            hid_dispose_report_desc(hw->repdesc);
        }
    }
    close(hw->fd);
    SDL_free(hw);
}

static struct joystick_hwdata *
CreateHwData(const char *path)
{
    struct joystick_hwdata *hw;
    struct hid_item hitem;
    struct hid_data *hdata;
    struct report *rep = NULL;
    int fd;
    int i;

    fd = open(path, O_RDONLY | O_CLOEXEC);
    if (fd == -1) {
        SDL_SetError("%s: %s", path, strerror(errno));
        return NULL;
    }

    hw = (struct joystick_hwdata *)
        SDL_calloc(1, sizeof(struct joystick_hwdata));
    if (hw == NULL) {
        close(fd);
        SDL_OutOfMemory();
        return NULL;
    }
    hw->fd = fd;

#ifdef SUPPORT_JOY_GAMEPORT
    if (SDL_strncmp(path, "/dev/joy", 8) == 0) {
        hw->type = BSDJOY_JOY;
        hw->naxes = 2;
        hw->nbuttons = 2;
    } else
#endif
    {
        hw->type = BSDJOY_UHID;
        {
            int ax;
            for (ax = 0; ax < JOYAXE_count; ax++) {
                hw->axis_map[ax] = -1;
            }
        }
        hw->repdesc = hid_get_report_desc(fd);
        if (hw->repdesc == NULL) {
            SDL_SetError("%s: USB_GET_REPORT_DESC: %s", path,
                         strerror(errno));
            goto usberr;
        }
        rep = &hw->inreport;
#if defined(__FREEBSD__) && (__FreeBSD_kernel_version > 800063) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
        rep->rid = hid_get_report_id(fd);
        if (rep->rid < 0) {
#else
        if (ioctl(fd, USB_GET_REPORT_ID, &rep->rid) < 0) {
#endif
            rep->rid = -1; /* XXX */
        }
        if (report_alloc(rep, hw->repdesc, REPORT_INPUT) < 0) {
            goto usberr;
        }
        if (rep->size <= 0) {
            SDL_SetError("%s: Input report descriptor has invalid length",
                         path);
            goto usberr;
        }
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_kernel_version >= 500111) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
        hdata = hid_start_parse(hw->repdesc, 1 << hid_input, rep->rid);
#else
        hdata = hid_start_parse(hw->repdesc, 1 << hid_input);
#endif
        if (hdata == NULL) {
            SDL_SetError("%s: Cannot start HID parser", path);
            goto usberr;
        }
        for (i = 0; i < JOYAXE_count; i++) {
            hw->axis_map[i] = -1;
        }

        while (hid_get_item(hdata, &hitem) > 0) {
            switch (hitem.kind) {
            case hid_input:
                switch (HID_PAGE(hitem.usage)) {
                case HUP_GENERIC_DESKTOP:
                {
                    int usage = HID_USAGE(hitem.usage);
                    int joyaxe = usage_to_joyaxe(usage);
                    if (joyaxe >= 0) {
                        hw->axis_map[joyaxe] = 1;
                    } else if (usage == HUG_HAT_SWITCH
#ifdef __OpenBSD__
                               || usage == HUG_DPAD_UP
#endif
                    ) {
                        hw->nhats++;
                    }
                    break;
                }
                case HUP_BUTTON:
                {
                    int usage = HID_USAGE(hitem.usage);
                    if (usage > hw->nbuttons) {
                        hw->nbuttons = usage;
                    }
                } break;
                default:
                    break;
                }
                break;
            default:
                break;
            }
        }
        hid_end_parse(hdata);
        for (i = 0; i < JOYAXE_count; i++) {
            if (hw->axis_map[i] > 0) {
                hw->axis_map[i] = hw->naxes++;
            }
        }

        if (hw->naxes == 0 && hw->nbuttons == 0 && hw->nhats == 0) {
            SDL_SetError("%s: Not a joystick, ignoring", path);
            goto usberr;
        }
    }

    /* The poll blocks the event thread. */
    fcntl(fd, F_SETFL, O_NONBLOCK);
#ifdef __NetBSD__
    /* Flush pending events */
    if (rep) {
        while (read(fd, REP_BUF_DATA(rep), rep->size) == rep->size)
            ;
    }
#endif

    return hw;

usberr:
    FreeHwData(hw);
    return NULL;
}

static int MaybeAddDevice(const char *path)
{
    struct stat sb;
    char *name = NULL;
    SDL_JoystickGUID guid;
    SDL_joylist_item *item;
    struct joystick_hwdata *hw;

    if (path == NULL) {
        return -1;
    }

    if (stat(path, &sb) == -1) {
        return -1;
    }

    /* Check to make sure it's not already in list. */
    for (item = SDL_joylist; item != NULL; item = item->next) {
        if (sb.st_rdev == item->devnum) {
            return -1; /* already have this one */
        }
    }

    hw = CreateHwData(path);
    if (hw == NULL) {
        return -1;
    }

    if (hw->type == BSDJOY_JOY) {
        name = SDL_strdup("Gameport joystick");
        guid = SDL_CreateJoystickGUIDForName(name);
    } else {
#ifdef USB_GET_DEVICEINFO
        struct usb_device_info di;
        if (ioctl(hw->fd, USB_GET_DEVICEINFO, &di) != -1) {
            name = SDL_CreateJoystickName(di.udi_vendorNo, di.udi_productNo, di.udi_vendor, di.udi_product);
            guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, di.udi_vendorNo, di.udi_productNo, di.udi_releaseNo, name, 0, 0);

#ifdef SDL_JOYSTICK_HIDAPI
            if (HIDAPI_IsDevicePresent(di.udi_vendorNo, di.udi_productNo, di.udi_releaseNo, name)) {
                /* The HIDAPI driver is taking care of this device */
                SDL_free(name);
                FreeHwData(hw);
                return -1;
            }
#endif
            if (SDL_ShouldIgnoreJoystick(name, guid)) {
                SDL_free(name);
                FreeHwData(hw);
                return -1;
            }
        }
#endif /* USB_GET_DEVICEINFO */
    }
    if (name == NULL) {
        name = SDL_strdup(path);
        guid = SDL_CreateJoystickGUIDForName(name);
    }
    FreeHwData(hw);

    item = (SDL_joylist_item *)SDL_calloc(1, sizeof(SDL_joylist_item));
    if (item == NULL) {
        SDL_free(name);
        return -1;
    }

    item->devnum = sb.st_rdev;
    item->path = SDL_strdup(path);
    item->name = name;
    item->guid = guid;

    if ((item->path == NULL) || (item->name == NULL)) {
        FreeJoylistItem(item);
        return -1;
    }

    item->device_instance = SDL_GetNextJoystickInstanceID();
    if (SDL_joylist_tail == NULL) {
        SDL_joylist = SDL_joylist_tail = item;
    } else {
        SDL_joylist_tail->next = item;
        SDL_joylist_tail = item;
    }

    /* Need to increment the joystick count before we post the event */
    ++numjoysticks;

    SDL_PrivateJoystickAdded(item->device_instance);

    return numjoysticks;
}

static int BSD_JoystickInit(void)
{
    char s[16];
    int i;

    for (i = 0; i < MAX_UHID_JOYS; i++) {
#if defined(__OpenBSD__) && (OpenBSD >= 202105)
        SDL_snprintf(s, SDL_arraysize(s), "/dev/ujoy/%d", i);
#else
        SDL_snprintf(s, SDL_arraysize(s), "/dev/uhid%d", i);
#endif
        MaybeAddDevice(s);
    }
#ifdef SUPPORT_JOY_GAMEPORT
    for (i = 0; i < MAX_JOY_JOYS; i++) {
        SDL_snprintf(s, SDL_arraysize(s), "/dev/joy%d", i);
        MaybeAddDevice(s);
    }
#endif /* SUPPORT_JOY_GAMEPORT */

    /* Read the default USB HID usage table. */
    hid_init(NULL);

    return numjoysticks;
}

static int BSD_JoystickGetCount(void)
{
    return numjoysticks;
}

static void BSD_JoystickDetect(void)
{
}

static SDL_joylist_item *JoystickByDevIndex(int device_index)
{
    SDL_joylist_item *item = SDL_joylist;

    if ((device_index < 0) || (device_index >= numjoysticks)) {
        return NULL;
    }

    while (device_index > 0) {
        SDL_assert(item != NULL);
        device_index--;
        item = item->next;
    }

    return item;
}

static const char *BSD_JoystickGetDeviceName(int device_index)
{
    return JoystickByDevIndex(device_index)->name;
}

static const char *BSD_JoystickGetDevicePath(int device_index)
{
    return JoystickByDevIndex(device_index)->path;
}

static int BSD_JoystickGetDevicePlayerIndex(int device_index)
{
    return -1;
}

static void BSD_JoystickSetDevicePlayerIndex(int device_index, int player_index)
{
}

static SDL_JoystickGUID BSD_JoystickGetDeviceGUID(int device_index)
{
    return JoystickByDevIndex(device_index)->guid;
}

/* Function to perform the mapping from device index to the instance id for this index */
static SDL_JoystickID BSD_JoystickGetDeviceInstanceID(int device_index)
{
    return JoystickByDevIndex(device_index)->device_instance;
}

static unsigned hatval_to_sdl(Sint32 hatval)
{
    static const unsigned hat_dir_map[8] = {
        SDL_HAT_UP, SDL_HAT_RIGHTUP, SDL_HAT_RIGHT, SDL_HAT_RIGHTDOWN,
        SDL_HAT_DOWN, SDL_HAT_LEFTDOWN, SDL_HAT_LEFT, SDL_HAT_LEFTUP
    };
    unsigned result;
    if ((hatval & 7) == hatval)
        result = hat_dir_map[hatval];
    else
        result = SDL_HAT_CENTERED;
    return result;
}

static int BSD_JoystickOpen(SDL_Joystick *joy, int device_index)
{
    SDL_joylist_item *item = JoystickByDevIndex(device_index);
    struct joystick_hwdata *hw;

    if (item == NULL) {
        return SDL_SetError("No such device");
    }

    hw = CreateHwData(item->path);
    if (hw == NULL) {
        return -1;
    }

    joy->instance_id = item->device_instance;
    joy->hwdata = hw;
    joy->naxes = hw->naxes;
    joy->nbuttons = hw->nbuttons;
    joy->nhats = hw->nhats;

    return 0;
}

static void BSD_JoystickUpdate(SDL_Joystick *joy)
{
    struct hid_item hitem;
    struct hid_data *hdata;
    struct report *rep;
    int nbutton, naxe = -1;
    Sint32 v;
#ifdef __OpenBSD__
    Sint32 dpad[4] = { 0, 0, 0, 0 };
#endif

#ifdef SUPPORT_JOY_GAMEPORT
    struct joystick gameport;
    static int x, y, xmin = 0xffff, ymin = 0xffff, xmax = 0, ymax = 0;

    if (joy->hwdata->type == BSDJOY_JOY) {
        while (read(joy->hwdata->fd, &gameport, sizeof(gameport)) == sizeof(gameport)) {
            if (SDL_abs(x - gameport.x) > 8) {
                x = gameport.x;
                if (x < xmin) {
                    xmin = x;
                }
                if (x > xmax) {
                    xmax = x;
                }
                if (xmin == xmax) {
                    xmin--;
                    xmax++;
                }
                v = (((SDL_JOYSTICK_AXIS_MAX - SDL_JOYSTICK_AXIS_MIN) * ((Sint32)x - xmin)) / (xmax - xmin)) + SDL_JOYSTICK_AXIS_MIN;
                SDL_PrivateJoystickAxis(joy, 0, v);
            }
            if (SDL_abs(y - gameport.y) > 8) {
                y = gameport.y;
                if (y < ymin) {
                    ymin = y;
                }
                if (y > ymax) {
                    ymax = y;
                }
                if (ymin == ymax) {
                    ymin--;
                    ymax++;
                }
                v = (((SDL_JOYSTICK_AXIS_MAX - SDL_JOYSTICK_AXIS_MIN) * ((Sint32)y - ymin)) / (ymax - ymin)) + SDL_JOYSTICK_AXIS_MIN;
                SDL_PrivateJoystickAxis(joy, 1, v);
            }
            SDL_PrivateJoystickButton(joy, 0, gameport.b1);
            SDL_PrivateJoystickButton(joy, 1, gameport.b2);
        }
        return;
    }
#endif /* SUPPORT_JOY_GAMEPORT */

    rep = &joy->hwdata->inreport;

    while (read(joy->hwdata->fd, REP_BUF_DATA(rep), rep->size) == rep->size) {
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_kernel_version >= 500111) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
        hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input, rep->rid);
#else
        hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input);
#endif
        if (hdata == NULL) {
            /*fprintf(stderr, "%s: Cannot start HID parser\n", joy->hwdata->path);*/
            continue;
        }

        while (hid_get_item(hdata, &hitem) > 0) {
            switch (hitem.kind) {
            case hid_input:
                switch (HID_PAGE(hitem.usage)) {
                case HUP_GENERIC_DESKTOP:
                {
                    int usage = HID_USAGE(hitem.usage);
                    int joyaxe = usage_to_joyaxe(usage);
                    if (joyaxe >= 0) {
                        naxe = joy->hwdata->axis_map[joyaxe];
                        /* scaleaxe */
                        v = (Sint32)hid_get_data(REP_BUF_DATA(rep), &hitem);
                        v = (((SDL_JOYSTICK_AXIS_MAX - SDL_JOYSTICK_AXIS_MIN) * (v - hitem.logical_minimum)) / (hitem.logical_maximum - hitem.logical_minimum)) + SDL_JOYSTICK_AXIS_MIN;
                        SDL_PrivateJoystickAxis(joy, naxe, v);
                    } else if (usage == HUG_HAT_SWITCH) {
                        v = (Sint32)hid_get_data(REP_BUF_DATA(rep), &hitem);
                        SDL_PrivateJoystickHat(joy, 0,
                                               hatval_to_sdl(v) -
                                                   hitem.logical_minimum);
                    }
#ifdef __OpenBSD__
                    else if (usage == HUG_DPAD_UP) {
                        dpad[0] = (Sint32)hid_get_data(REP_BUF_DATA(rep), &hitem);
                        SDL_PrivateJoystickHat(joy, 0, dpad_to_sdl(dpad));
                    } else if (usage == HUG_DPAD_DOWN) {
                        dpad[1] = (Sint32)hid_get_data(REP_BUF_DATA(rep), &hitem);
                        SDL_PrivateJoystickHat(joy, 0, dpad_to_sdl(dpad));
                    } else if (usage == HUG_DPAD_RIGHT) {
                        dpad[2] = (Sint32)hid_get_data(REP_BUF_DATA(rep), &hitem);
                        SDL_PrivateJoystickHat(joy, 0, dpad_to_sdl(dpad));
                    } else if (usage == HUG_DPAD_LEFT) {
                        dpad[3] = (Sint32)hid_get_data(REP_BUF_DATA(rep), &hitem);
                        SDL_PrivateJoystickHat(joy, 0, dpad_to_sdl(dpad));
                    }
#endif
                    break;
                }
                case HUP_BUTTON:
                    v = (Sint32)hid_get_data(REP_BUF_DATA(rep), &hitem);
                    nbutton = HID_USAGE(hitem.usage) - 1; /* SDL buttons are zero-based */
                    SDL_PrivateJoystickButton(joy, nbutton, v);
                    break;
                default:
                    continue;
                }
                break;
            default:
                break;
            }
        }
        hid_end_parse(hdata);
    }
}

/* Function to close a joystick after use */
static void BSD_JoystickClose(SDL_Joystick *joy)
{
    if (joy->hwdata) {
        FreeHwData(joy->hwdata);
        joy->hwdata = NULL;
    }
}

static void BSD_JoystickQuit(void)
{
    SDL_joylist_item *item = NULL;
    SDL_joylist_item *next = NULL;

    for (item = SDL_joylist; item; item = next) {
        next = item->next;
        FreeJoylistItem(item);
    }

    SDL_joylist = SDL_joylist_tail = NULL;

    numjoysticks = 0;
}

static int report_alloc(struct report *r, struct report_desc *rd, int repind)
{
    int len;

#ifdef __DragonFly__
    len = hid_report_size(rd, repinfo[repind].kind, r->rid);
#elif __FREEBSD__
#if (__FreeBSD_kernel_version >= 460000) || defined(__FreeBSD_kernel__)
#if (__FreeBSD_kernel_version <= 500111)
    len = hid_report_size(rd, r->rid, repinfo[repind].kind);
#else
    len = hid_report_size(rd, repinfo[repind].kind, r->rid);
#endif
#else
    len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
#endif
#else
#ifdef USBHID_NEW
    len = hid_report_size(rd, repinfo[repind].kind, r->rid);
#else
    len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
#endif
#endif

    if (len < 0) {
        return SDL_SetError("Negative HID report size");
    }
    r->size = len;

    if (r->size > 0) {
#if defined(__FREEBSD__) && (__FreeBSD_kernel_version > 900000) || defined(__DragonFly__)
        r->buf = SDL_malloc(r->size);
#else
        r->buf = SDL_malloc(sizeof(*r->buf) - sizeof(REP_BUF_DATA(r)) +
                            r->size);
#endif
        if (r->buf == NULL) {
            return SDL_OutOfMemory();
        }
    } else {
        r->buf = NULL;
    }

    r->status = SREPORT_CLEAN;
    return 0;
}

static void report_free(struct report *r)
{
    SDL_free(r->buf);
    r->status = SREPORT_UNINIT;
}

static int BSD_JoystickRumble(SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)
{
    return SDL_Unsupported();
}

static int BSD_JoystickRumbleTriggers(SDL_Joystick *joystick, Uint16 left_rumble, Uint16 right_rumble)
{
    return SDL_Unsupported();
}

static SDL_bool BSD_JoystickGetGamepadMapping(int device_index, SDL_GamepadMapping *out)
{
    return SDL_FALSE;
}

static Uint32 BSD_JoystickGetCapabilities(SDL_Joystick *joystick)
{
    return 0;
}

static int BSD_JoystickSetLED(SDL_Joystick *joystick, Uint8 red, Uint8 green, Uint8 blue)
{
    return SDL_Unsupported();
}

static int BSD_JoystickSendEffect(SDL_Joystick *joystick, const void *data, int size)
{
    return SDL_Unsupported();
}

static int BSD_JoystickSetSensorsEnabled(SDL_Joystick *joystick, SDL_bool enabled)
{
    return SDL_Unsupported();
}

SDL_JoystickDriver SDL_BSD_JoystickDriver = {
    BSD_JoystickInit,
    BSD_JoystickGetCount,
    BSD_JoystickDetect,
    BSD_JoystickGetDeviceName,
    BSD_JoystickGetDevicePath,
    BSD_JoystickGetDevicePlayerIndex,
    BSD_JoystickSetDevicePlayerIndex,
    BSD_JoystickGetDeviceGUID,
    BSD_JoystickGetDeviceInstanceID,
    BSD_JoystickOpen,
    BSD_JoystickRumble,
    BSD_JoystickRumbleTriggers,
    BSD_JoystickGetCapabilities,
    BSD_JoystickSetLED,
    BSD_JoystickSendEffect,
    BSD_JoystickSetSensorsEnabled,
    BSD_JoystickUpdate,
    BSD_JoystickClose,
    BSD_JoystickQuit,
    BSD_JoystickGetGamepadMapping
};

#endif /* SDL_JOYSTICK_USBHID */

/* vi: set ts=4 sw=4 expandtab: */