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Copy pathSDL_hidapi.c
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1693 lines (1485 loc) · 57.2 KB
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2024 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.
*/
/* Original hybrid wrapper for Linux by Valve Software. Their original notes:
*
* The libusb version doesn't support Bluetooth, but not all Linux
* distributions allow access to /dev/hidraw*
*
* This merges the two, at a small performance cost, until distributions
* have granted access to /dev/hidraw*
*/
#include "../SDL_internal.h"
#include "SDL_hidapi.h"
#include "SDL_hidapi_c.h"
#include "SDL_loadso.h"
#include "SDL_thread.h"
#include "SDL_timer.h"
#ifndef SDL_HIDAPI_DISABLED
#if defined(__WIN32__) || defined(__WINGDK__)
#include "../core/windows/SDL_windows.h"
#endif
#if defined(__MACOSX__)
#include <AvailabilityMacros.h>
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/hid/IOHIDDevice.h>
#include <IOKit/usb/USBSpec.h>
#include <mach/mach.h>
/* Things named "Master" were renamed to "Main" in macOS 12.0's SDK. */
#if MAC_OS_X_VERSION_MIN_REQUIRED < 120000
#define kIOMainPortDefault kIOMasterPortDefault
#endif
#endif
#include "../core/linux/SDL_udev.h"
#ifdef SDL_USE_LIBUDEV
#include "../core/linux/SDL_sandbox.h"
#include <poll.h>
#endif
#ifdef HAVE_INOTIFY
#include <errno.h> /* errno, strerror */
#include <fcntl.h>
#include <limits.h> /* For the definition of NAME_MAX */
#include <sys/inotify.h>
#include <unistd.h> /* just in case we didn't use that SDL_USE_LIBUDEV block... */
#endif
#if defined(SDL_USE_LIBUDEV) || defined(HAVE_INOTIFY)
#include <unistd.h>
#endif
#if defined(SDL_USE_LIBUDEV)
typedef enum
{
ENUMERATION_UNSET,
ENUMERATION_LIBUDEV,
ENUMERATION_FALLBACK
} LinuxEnumerationMethod;
static LinuxEnumerationMethod linux_enumeration_method = ENUMERATION_UNSET;
#endif
#if defined(HAVE_INOTIFY)
static int inotify_fd = -1;
#endif
#if defined(SDL_USE_LIBUDEV)
static const SDL_UDEV_Symbols *usyms = NULL;
#endif
static struct
{
SDL_bool m_bInitialized;
Uint32 m_unDeviceChangeCounter;
SDL_bool m_bCanGetNotifications;
Uint32 m_unLastDetect;
#if defined(__WIN32__) || defined(__WINGDK__)
SDL_threadID m_nThreadID;
WNDCLASSEXA m_wndClass;
HWND m_hwndMsg;
HDEVNOTIFY m_hNotify;
double m_flLastWin32MessageCheck;
#endif
#if defined(__MACOSX__)
IONotificationPortRef m_notificationPort;
mach_port_t m_notificationMach;
#endif
#if defined(SDL_USE_LIBUDEV)
struct udev *m_pUdev;
struct udev_monitor *m_pUdevMonitor;
int m_nUdevFd;
#endif
} SDL_HIDAPI_discovery;
#if defined(__WIN32__) || defined(__WINGDK__)
struct _DEV_BROADCAST_HDR
{
DWORD dbch_size;
DWORD dbch_devicetype;
DWORD dbch_reserved;
};
typedef struct _DEV_BROADCAST_DEVICEINTERFACE_A
{
DWORD dbcc_size;
DWORD dbcc_devicetype;
DWORD dbcc_reserved;
GUID dbcc_classguid;
char dbcc_name[1];
} DEV_BROADCAST_DEVICEINTERFACE_A, *PDEV_BROADCAST_DEVICEINTERFACE_A;
typedef struct _DEV_BROADCAST_HDR DEV_BROADCAST_HDR;
#define DBT_DEVICEARRIVAL 0x8000 /* system detected a new device */
#define DBT_DEVICEREMOVECOMPLETE 0x8004 /* device was removed from the system */
#define DBT_DEVTYP_DEVICEINTERFACE 0x00000005 /* device interface class */
#define DBT_DEVNODES_CHANGED 0x0007
#define DBT_CONFIGCHANGED 0x0018
#define DBT_DEVICETYPESPECIFIC 0x8005 /* type specific event */
#define DBT_DEVINSTSTARTED 0x8008 /* device installed and started */
#include <initguid.h>
DEFINE_GUID(GUID_DEVINTERFACE_USB_DEVICE, 0xA5DCBF10L, 0x6530, 0x11D2, 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED);
static LRESULT CALLBACK ControllerWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) {
case WM_DEVICECHANGE:
switch (wParam) {
case DBT_DEVICEARRIVAL:
case DBT_DEVICEREMOVECOMPLETE:
if (((DEV_BROADCAST_HDR *)lParam)->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE) {
++SDL_HIDAPI_discovery.m_unDeviceChangeCounter;
}
break;
}
return TRUE;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
#endif /* defined(__WIN32__) || defined(__WINGDK__) */
#if defined(__MACOSX__)
static void CallbackIOServiceFunc(void *context, io_iterator_t portIterator)
{
/* Must drain the iterator, or we won't receive new notifications */
io_object_t entry;
while ((entry = IOIteratorNext(portIterator)) != 0) {
IOObjectRelease(entry);
++SDL_HIDAPI_discovery.m_unDeviceChangeCounter;
}
}
#endif /* __MACOSX__ */
#ifdef HAVE_INOTIFY
#ifdef HAVE_INOTIFY_INIT1
static int SDL_inotify_init1(void)
{
return inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
}
#else
static int SDL_inotify_init1(void)
{
int fd = inotify_init();
if (fd < 0) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
fcntl(fd, F_SETFD, FD_CLOEXEC);
return fd;
}
#endif
static int StrHasPrefix(const char *string, const char *prefix)
{
return SDL_strncmp(string, prefix, SDL_strlen(prefix)) == 0;
}
static int StrIsInteger(const char *string)
{
const char *p;
if (*string == '\0') {
return 0;
}
for (p = string; *p != '\0'; p++) {
if (*p < '0' || *p > '9') {
return 0;
}
}
return 1;
}
#endif /* HAVE_INOTIFY */
static void HIDAPI_InitializeDiscovery(void)
{
SDL_HIDAPI_discovery.m_bInitialized = SDL_TRUE;
SDL_HIDAPI_discovery.m_unDeviceChangeCounter = 1;
SDL_HIDAPI_discovery.m_bCanGetNotifications = SDL_FALSE;
SDL_HIDAPI_discovery.m_unLastDetect = 0;
#if defined(__WIN32__) || defined(__WINGDK__)
SDL_HIDAPI_discovery.m_nThreadID = SDL_ThreadID();
SDL_zero(SDL_HIDAPI_discovery.m_wndClass);
SDL_HIDAPI_discovery.m_wndClass.hInstance = GetModuleHandle(NULL);
SDL_HIDAPI_discovery.m_wndClass.lpszClassName = "SDL_HIDAPI_DEVICE_DETECTION";
SDL_HIDAPI_discovery.m_wndClass.lpfnWndProc = ControllerWndProc; /* This function is called by windows */
SDL_HIDAPI_discovery.m_wndClass.cbSize = sizeof(WNDCLASSEX);
RegisterClassExA(&SDL_HIDAPI_discovery.m_wndClass);
SDL_HIDAPI_discovery.m_hwndMsg = CreateWindowExA(0, "SDL_HIDAPI_DEVICE_DETECTION", NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
{
DEV_BROADCAST_DEVICEINTERFACE_A devBroadcast;
SDL_zero(devBroadcast);
devBroadcast.dbcc_size = sizeof(devBroadcast);
devBroadcast.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
devBroadcast.dbcc_classguid = GUID_DEVINTERFACE_USB_DEVICE;
/* DEVICE_NOTIFY_ALL_INTERFACE_CLASSES is important, makes GUID_DEVINTERFACE_USB_DEVICE ignored,
* but that seems to be necessary to get a notice after each individual usb input device actually
* installs, rather than just as the composite device is seen.
*/
SDL_HIDAPI_discovery.m_hNotify = RegisterDeviceNotification(SDL_HIDAPI_discovery.m_hwndMsg, &devBroadcast, DEVICE_NOTIFY_WINDOW_HANDLE | DEVICE_NOTIFY_ALL_INTERFACE_CLASSES);
SDL_HIDAPI_discovery.m_bCanGetNotifications = (SDL_HIDAPI_discovery.m_hNotify != 0);
}
#endif /* defined(__WIN32__) || defined(__WINGDK__) */
#if defined(__MACOSX__)
SDL_HIDAPI_discovery.m_notificationPort = IONotificationPortCreate(kIOMainPortDefault);
if (SDL_HIDAPI_discovery.m_notificationPort) {
{
io_iterator_t portIterator = 0;
io_object_t entry;
IOReturn result = IOServiceAddMatchingNotification(
SDL_HIDAPI_discovery.m_notificationPort,
kIOFirstMatchNotification,
IOServiceMatching(kIOHIDDeviceKey),
CallbackIOServiceFunc, NULL, &portIterator);
if (result == 0) {
/* Must drain the existing iterator, or we won't receive new notifications */
while ((entry = IOIteratorNext(portIterator)) != 0) {
IOObjectRelease(entry);
}
} else {
IONotificationPortDestroy(SDL_HIDAPI_discovery.m_notificationPort);
SDL_HIDAPI_discovery.m_notificationPort = nil;
}
}
{
io_iterator_t portIterator = 0;
io_object_t entry;
IOReturn result = IOServiceAddMatchingNotification(
SDL_HIDAPI_discovery.m_notificationPort,
kIOTerminatedNotification,
IOServiceMatching(kIOHIDDeviceKey),
CallbackIOServiceFunc, NULL, &portIterator);
if (result == 0) {
/* Must drain the existing iterator, or we won't receive new notifications */
while ((entry = IOIteratorNext(portIterator)) != 0) {
IOObjectRelease(entry);
}
} else {
IONotificationPortDestroy(SDL_HIDAPI_discovery.m_notificationPort);
SDL_HIDAPI_discovery.m_notificationPort = nil;
}
}
}
SDL_HIDAPI_discovery.m_notificationMach = MACH_PORT_NULL;
if (SDL_HIDAPI_discovery.m_notificationPort) {
SDL_HIDAPI_discovery.m_notificationMach = IONotificationPortGetMachPort(SDL_HIDAPI_discovery.m_notificationPort);
}
SDL_HIDAPI_discovery.m_bCanGetNotifications = (SDL_HIDAPI_discovery.m_notificationMach != MACH_PORT_NULL);
#endif /* __MACOSX__ */
#if defined(SDL_USE_LIBUDEV)
if (linux_enumeration_method == ENUMERATION_LIBUDEV) {
SDL_HIDAPI_discovery.m_pUdev = NULL;
SDL_HIDAPI_discovery.m_pUdevMonitor = NULL;
SDL_HIDAPI_discovery.m_nUdevFd = -1;
usyms = SDL_UDEV_GetUdevSyms();
if (usyms != NULL) {
SDL_HIDAPI_discovery.m_pUdev = usyms->udev_new();
if (SDL_HIDAPI_discovery.m_pUdev != NULL) {
SDL_HIDAPI_discovery.m_pUdevMonitor = usyms->udev_monitor_new_from_netlink(SDL_HIDAPI_discovery.m_pUdev, "udev");
if (SDL_HIDAPI_discovery.m_pUdevMonitor != NULL) {
usyms->udev_monitor_enable_receiving(SDL_HIDAPI_discovery.m_pUdevMonitor);
SDL_HIDAPI_discovery.m_nUdevFd = usyms->udev_monitor_get_fd(SDL_HIDAPI_discovery.m_pUdevMonitor);
SDL_HIDAPI_discovery.m_bCanGetNotifications = SDL_TRUE;
}
}
}
} else
#endif /* SDL_USE_LIBUDEV */
{
#if defined(HAVE_INOTIFY)
inotify_fd = SDL_inotify_init1();
if (inotify_fd < 0) {
SDL_LogWarn(SDL_LOG_CATEGORY_INPUT,
"Unable to initialize inotify, falling back to polling: %s",
strerror(errno));
return;
}
/* We need to watch for attribute changes in addition to
* creation, because when a device is first created, it has
* permissions that we can't read. When udev chmods it to
* something that we maybe *can* read, we'll get an
* IN_ATTRIB event to tell us. */
if (inotify_add_watch(inotify_fd, "/dev",
IN_CREATE | IN_DELETE | IN_MOVE | IN_ATTRIB) < 0) {
close(inotify_fd);
inotify_fd = -1;
SDL_LogWarn(SDL_LOG_CATEGORY_INPUT,
"Unable to add inotify watch, falling back to polling: %s",
strerror(errno));
return;
}
SDL_HIDAPI_discovery.m_bCanGetNotifications = SDL_TRUE;
#endif /* HAVE_INOTIFY */
}
}
static void HIDAPI_UpdateDiscovery(void)
{
if (!SDL_HIDAPI_discovery.m_bInitialized) {
HIDAPI_InitializeDiscovery();
}
if (!SDL_HIDAPI_discovery.m_bCanGetNotifications) {
const Uint32 SDL_HIDAPI_DETECT_INTERVAL_MS = 3000; /* Update every 3 seconds */
Uint32 now = SDL_GetTicks();
if (!SDL_HIDAPI_discovery.m_unLastDetect || SDL_TICKS_PASSED(now, SDL_HIDAPI_discovery.m_unLastDetect + SDL_HIDAPI_DETECT_INTERVAL_MS)) {
++SDL_HIDAPI_discovery.m_unDeviceChangeCounter;
SDL_HIDAPI_discovery.m_unLastDetect = now;
}
return;
}
#if defined(__WIN32__) || defined(__WINGDK__)
#if 0 /* just let the usual SDL_PumpEvents loop dispatch these, fixing bug 4286. --ryan. */
/* We'll only get messages on the same thread that created the window */
if (SDL_ThreadID() == SDL_HIDAPI_discovery.m_nThreadID) {
MSG msg;
while (PeekMessage(&msg, SDL_HIDAPI_discovery.m_hwndMsg, 0, 0, PM_NOREMOVE)) {
if (GetMessageA(&msg, SDL_HIDAPI_discovery.m_hwndMsg, 0, 0) != 0) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
}
#endif
#endif /* defined(__WIN32__) || defined(__WINGDK__) */
#if defined(__MACOSX__)
if (SDL_HIDAPI_discovery.m_notificationPort) {
struct
{
mach_msg_header_t hdr;
char payload[4096];
} msg;
while (mach_msg(&msg.hdr, MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, sizeof(msg), SDL_HIDAPI_discovery.m_notificationMach, 0, MACH_PORT_NULL) == KERN_SUCCESS) {
IODispatchCalloutFromMessage(NULL, &msg.hdr, SDL_HIDAPI_discovery.m_notificationPort);
}
}
#endif
#if defined(SDL_USE_LIBUDEV)
if (linux_enumeration_method == ENUMERATION_LIBUDEV) {
if (SDL_HIDAPI_discovery.m_nUdevFd >= 0) {
/* Drain all notification events.
* We don't expect a lot of device notifications so just
* do a new discovery on any kind or number of notifications.
* This could be made more restrictive if necessary.
*/
for (;;) {
struct pollfd PollUdev;
struct udev_device *pUdevDevice;
PollUdev.fd = SDL_HIDAPI_discovery.m_nUdevFd;
PollUdev.events = POLLIN;
if (poll(&PollUdev, 1, 0) != 1) {
break;
}
pUdevDevice = usyms->udev_monitor_receive_device(SDL_HIDAPI_discovery.m_pUdevMonitor);
if (pUdevDevice) {
const char *action = NULL;
action = usyms->udev_device_get_action(pUdevDevice);
if (action == NULL || SDL_strcmp(action, "add") == 0 || SDL_strcmp(action, "remove") == 0) {
++SDL_HIDAPI_discovery.m_unDeviceChangeCounter;
}
usyms->udev_device_unref(pUdevDevice);
}
}
}
} else
#endif /* SDL_USE_LIBUDEV */
{
#if defined(HAVE_INOTIFY)
if (inotify_fd >= 0) {
union
{
struct inotify_event event;
char storage[4096];
char enough_for_inotify[sizeof(struct inotify_event) + NAME_MAX + 1];
} buf;
ssize_t bytes;
size_t remain = 0;
size_t len;
bytes = read(inotify_fd, &buf, sizeof(buf));
if (bytes > 0) {
remain = (size_t)bytes;
}
while (remain > 0) {
if (buf.event.len > 0) {
if (StrHasPrefix(buf.event.name, "hidraw") &&
StrIsInteger(buf.event.name + SDL_strlen("hidraw"))) {
++SDL_HIDAPI_discovery.m_unDeviceChangeCounter;
/* We found an hidraw change. We still continue to
* drain the inotify fd to avoid leaving old
* notifications in the queue. */
}
}
len = sizeof(struct inotify_event) + buf.event.len;
remain -= len;
if (remain != 0) {
SDL_memmove(&buf.storage[0], &buf.storage[len], remain);
}
}
}
#endif /* HAVE_INOTIFY */
}
}
static void HIDAPI_ShutdownDiscovery(void)
{
if (!SDL_HIDAPI_discovery.m_bInitialized) {
return;
}
#if defined(__WIN32__) || defined(__WINGDK__)
if (SDL_HIDAPI_discovery.m_hNotify) {
UnregisterDeviceNotification(SDL_HIDAPI_discovery.m_hNotify);
}
if (SDL_HIDAPI_discovery.m_hwndMsg) {
DestroyWindow(SDL_HIDAPI_discovery.m_hwndMsg);
}
UnregisterClassA(SDL_HIDAPI_discovery.m_wndClass.lpszClassName, SDL_HIDAPI_discovery.m_wndClass.hInstance);
#endif
#if defined(__MACOSX__)
if (SDL_HIDAPI_discovery.m_notificationPort) {
IONotificationPortDestroy(SDL_HIDAPI_discovery.m_notificationPort);
}
#endif
#if defined(SDL_USE_LIBUDEV)
if (linux_enumeration_method == ENUMERATION_LIBUDEV) {
if (usyms) {
if (SDL_HIDAPI_discovery.m_pUdevMonitor) {
usyms->udev_monitor_unref(SDL_HIDAPI_discovery.m_pUdevMonitor);
}
if (SDL_HIDAPI_discovery.m_pUdev) {
usyms->udev_unref(SDL_HIDAPI_discovery.m_pUdev);
}
SDL_UDEV_ReleaseUdevSyms();
usyms = NULL;
}
} else
#endif /* SDL_USE_LIBUDEV */
{
#if defined(HAVE_INOTIFY)
if (inotify_fd >= 0) {
close(inotify_fd);
inotify_fd = -1;
}
#endif
}
SDL_HIDAPI_discovery.m_bInitialized = SDL_FALSE;
}
/* Platform HIDAPI Implementation */
#define hid_device PLATFORM_hid_device
#define hid_device_ PLATFORM_hid_device_
#define hid_init PLATFORM_hid_init
#define hid_exit PLATFORM_hid_exit
#define hid_enumerate PLATFORM_hid_enumerate
#define hid_free_enumeration PLATFORM_hid_free_enumeration
#define hid_open PLATFORM_hid_open
#define hid_open_path PLATFORM_hid_open_path
#define hid_write PLATFORM_hid_write
#define hid_read_timeout PLATFORM_hid_read_timeout
#define hid_read PLATFORM_hid_read
#define hid_set_nonblocking PLATFORM_hid_set_nonblocking
#define hid_send_feature_report PLATFORM_hid_send_feature_report
#define hid_get_feature_report PLATFORM_hid_get_feature_report
#define hid_close PLATFORM_hid_close
#define hid_get_manufacturer_string PLATFORM_hid_get_manufacturer_string
#define hid_get_product_string PLATFORM_hid_get_product_string
#define hid_get_serial_number_string PLATFORM_hid_get_serial_number_string
#define hid_get_indexed_string PLATFORM_hid_get_indexed_string
#define hid_error PLATFORM_hid_error
#define new_hid_device PLATFORM_new_hid_device
#define free_hid_device PLATFORM_free_hid_device
#define input_report PLATFORM_input_report
#define return_data PLATFORM_return_data
#define make_path PLATFORM_make_path
#define read_thread PLATFORM_read_thread
#undef HIDAPI_H__
#ifdef __LINUX__
#ifdef SDL_USE_LIBUDEV
static const SDL_UDEV_Symbols *udev_ctx = NULL;
#define udev_device_get_sysattr_value udev_ctx->udev_device_get_sysattr_value
#define udev_new udev_ctx->udev_new
#define udev_unref udev_ctx->udev_unref
#define udev_device_new_from_devnum udev_ctx->udev_device_new_from_devnum
#define udev_device_get_parent_with_subsystem_devtype udev_ctx->udev_device_get_parent_with_subsystem_devtype
#define udev_device_unref udev_ctx->udev_device_unref
#define udev_enumerate_new udev_ctx->udev_enumerate_new
#define udev_enumerate_add_match_subsystem udev_ctx->udev_enumerate_add_match_subsystem
#define udev_enumerate_scan_devices udev_ctx->udev_enumerate_scan_devices
#define udev_enumerate_get_list_entry udev_ctx->udev_enumerate_get_list_entry
#define udev_list_entry_get_name udev_ctx->udev_list_entry_get_name
#define udev_device_new_from_syspath udev_ctx->udev_device_new_from_syspath
#define udev_device_get_devnode udev_ctx->udev_device_get_devnode
#define udev_list_entry_get_next udev_ctx->udev_list_entry_get_next
#define udev_enumerate_unref udev_ctx->udev_enumerate_unref
#include "linux/hid.c"
#define HAVE_PLATFORM_BACKEND
#endif /* SDL_USE_LIBUDEV */
#elif defined(__MACOSX__)
#include "mac/hid.c"
#define HAVE_PLATFORM_BACKEND
#define udev_ctx 1
#elif defined(__WINDOWS__) || defined(__WINGDK__)
#include "windows/hid.c"
#define HAVE_PLATFORM_BACKEND
#define udev_ctx 1
#elif defined(__ANDROID__)
/* The implementation for Android is in a separate .cpp file */
#include "hidapi/hidapi.h"
#define HAVE_PLATFORM_BACKEND 1
#define udev_ctx 1
#elif defined(__IPHONEOS__) || defined(__TVOS__)
/* The implementation for iOS and tvOS is in a separate .m file */
#include "hidapi/hidapi.h"
#define HAVE_PLATFORM_BACKEND 1
#define udev_ctx 1
#endif
#undef hid_device
#undef hid_device_
#undef hid_init
#undef hid_exit
#undef hid_enumerate
#undef hid_free_enumeration
#undef hid_open
#undef hid_open_path
#undef hid_write
#undef hid_read_timeout
#undef hid_read
#undef hid_set_nonblocking
#undef hid_send_feature_report
#undef hid_get_feature_report
#undef hid_close
#undef hid_get_manufacturer_string
#undef hid_get_product_string
#undef hid_get_serial_number_string
#undef hid_get_indexed_string
#undef hid_error
#undef new_hid_device
#undef free_hid_device
#undef input_report
#undef return_data
10BC8
#undef make_path
#undef read_thread
#ifdef SDL_JOYSTICK_HIDAPI_STEAMXBOX
#define HAVE_DRIVER_BACKEND 1
#else
#define HAVE_DRIVER_BACKEND 0
#endif
#if HAVE_DRIVER_BACKEND
/* DRIVER HIDAPI Implementation */
#define hid_device DRIVER_hid_device
#define hid_device_ DRIVER_hid_device_
#define hid_init DRIVER_hid_init
#define hid_exit DRIVER_hid_exit
#define hid_enumerate DRIVER_hid_enumerate
#define hid_free_enumeration DRIVER_hid_free_enumeration
#define hid_open DRIVER_hid_open
#define hid_open_path DRIVER_hid_open_path
#define hid_write DRIVER_hid_write
#define hid_read_timeout DRIVER_hid_read_timeout
#define hid_read DRIVER_hid_read
#define hid_set_nonblocking DRIVER_hid_set_nonblocking
#define hid_send_feature_report DRIVER_hid_send_feature_report
#define hid_get_feature_report DRIVER_hid_get_feature_report
#define hid_close DRIVER_hid_close
#define hid_get_manufacturer_string DRIVER_hid_get_manufacturer_string
#define hid_get_product_string DRIVER_hid_get_product_string
#define hid_get_serial_number_string DRIVER_hid_get_serial_number_string
#define hid_get_indexed_string DRIVER_hid_get_indexed_string
#define hid_error DRIVER_hid_error
#ifdef SDL_JOYSTICK_HIDAPI_STEAMXBOX
#undef HIDAPI_H__
#include "steamxbox/hid.c"
#else
#error Need a driver hid.c for this platform!
#endif
#undef hid_device
#undef hid_device_
#undef hid_init
#undef hid_exit
#undef hid_enumerate
#undef hid_free_enumeration
#undef hid_open
#undef hid_open_path
#undef hid_write
#undef hid_read_timeout
#undef hid_read
#undef hid_set_nonblocking
#undef hid_send_feature_report
#undef hid_get_feature_report
#undef hid_close
#undef hid_get_manufacturer_string
#undef hid_get_product_string
#undef hid_get_serial_number_string
#undef hid_get_indexed_string
#undef hid_error
#endif /* HAVE_DRIVER_BACKEND */
#ifdef HAVE_LIBUSB
/* libusb HIDAPI Implementation */
/* Include this now, for our dynamically-loaded libusb context */
#include <libusb.h>
static struct
{
void *libhandle;
/* *INDENT-OFF* */ /* clang-format off */
int (LIBUSB_CALL *init)(libusb_context **ctx);
void (LIBUSB_CALL *exit)(libusb_context *ctx);
ssize_t (LIBUSB_CALL *get_device_list)(libusb_context *ctx, libusb_device ***list);
void (LIBUSB_CALL *free_device_list)(libusb_device **list, int unref_devices);
int (LIBUSB_CALL *get_device_descriptor)(libusb_device *dev, struct libusb_device_descriptor *desc);
int (LIBUSB_CALL *get_active_config_descriptor)(libusb_device *dev, struct libusb_config_descriptor **config);
int (LIBUSB_CALL *get_config_descriptor)(
libusb_device *dev,
uint8_t config_index,
struct libusb_config_descriptor **config
);
void (LIBUSB_CALL *free_config_descriptor)(struct libusb_config_descriptor *config);
uint8_t (LIBUSB_CALL *get_bus_number)(libusb_device *dev);
uint8_t (LIBUSB_CALL *get_device_address)(libusb_device *dev);
int (LIBUSB_CALL *open)(libusb_device *dev, libusb_device_handle **dev_handle);
void (LIBUSB_CALL *close)(libusb_device_handle *dev_handle);
int (LIBUSB_CALL *claim_interface)(libusb_device_handle *dev_handle, int interface_number);
int (LIBUSB_CALL *release_interface)(libusb_device_handle *dev_handle, int interface_number);
int (LIBUSB_CALL *kernel_driver_active)(libusb_device_handle *dev_handle, int interface_number);
int (LIBUSB_CALL *detach_kernel_driver)(libusb_device_handle *dev_handle, int interface_number);
int (LIBUSB_CALL *attach_kernel_driver)(libusb_device_handle *dev_handle, int interface_number);
int (LIBUSB_CALL *set_interface_alt_setting)(libusb_device_handle *dev, int interface_number, int alternate_setting);
struct libusb_transfer * (LIBUSB_CALL *alloc_transfer)(int iso_packets);
int (LIBUSB_CALL *submit_transfer)(struct libusb_transfer *transfer);
int (LIBUSB_CALL *cancel_transfer)(struct libusb_transfer *transfer);
void (LIBUSB_CALL *free_transfer)(struct libusb_transfer *transfer);
int (LIBUSB_CALL *control_transfer)(
libusb_device_handle *dev_handle,
uint8_t request_type,
uint8_t bRequest,
uint16_t wValue,
uint16_t wIndex,
unsigned char *data,
uint16_t wLength,
unsigned int timeout
);
int (LIBUSB_CALL *interrupt_transfer)(
libusb_device_handle *dev_handle,
unsigned char endpoint,
unsigned char *data,
int length,
int *actual_length,
unsigned int timeout
);
int (LIBUSB_CALL *handle_events)(libusb_context *ctx);
int (LIBUSB_CALL *handle_events_completed)(libusb_context *ctx, int *completed);
const char * (LIBUSB_CALL *error_name)(int errcode);
/* *INDENT-ON* */ /* clang-format on */
} libusb_ctx;
#define libusb_init libusb_ctx.init
#define libusb_exit libusb_ctx.exit
#define libusb_get_device_list libusb_ctx.get_device_list
#define libusb_free_device_list libusb_ctx.free_device_list
#define libusb_get_device_descriptor libusb_ctx.get_device_descriptor
#define libusb_get_active_config_descriptor libusb_ctx.get_active_config_descriptor
#define libusb_get_config_descriptor libusb_ctx.get_config_descriptor
#define libusb_free_config_descriptor libusb_ctx.free_config_descriptor
#define libusb_get_bus_number libusb_ctx.get_bus_number
#define libusb_get_device_address libusb_ctx.get_device_address
#define libusb_open libusb_ctx.open
#define libusb_close libusb_ctx.close
#define libusb_claim_interface libusb_ctx.claim_interface
#define libusb_release_interface libusb_ctx.release_interface
#define libusb_kernel_driver_active libusb_ctx.kernel_driver_active
#define libusb_detach_kernel_driver libusb_ctx.detach_kernel_driver
#define libusb_attach_kernel_driver libusb_ctx.attach_kernel_driver
#define libusb_set_interface_alt_setting libusb_ctx.set_interface_alt_setting
#define libusb_alloc_transfer libusb_ctx.alloc_transfer
#define libusb_submit_transfer libusb_ctx.submit_transfer
#define libusb_cancel_transfer libusb_ctx.cancel_transfer
#define libusb_free_transfer libusb_ctx.free_transfer
#define libusb_control_transfer libusb_ctx.control_transfer
#define libusb_interrupt_transfer libusb_ctx.interrupt_transfer
#define libusb_handle_events libusb_ctx.handle_events
#define libusb_handle_events_completed libusb_ctx.handle_events_completed
#define libusb_error_name libusb_ctx.error_name
#define hid_device LIBUSB_hid_device
#define hid_device_ LIBUSB_hid_device_
#define hid_init LIBUSB_hid_init
#define hid_exit LIBUSB_hid_exit
#define hid_enumerate LIBUSB_hid_enumerate
#define hid_free_enumeration LIBUSB_hid_free_enumeration
#define hid_open LIBUSB_hid_open
#define hid_open_path LIBUSB_hid_open_path
#define hid_write LIBUSB_hid_write
#define hid_read_timeout LIBUSB_hid_read_timeout
#define hid_read LIBUSB_hid_read
#define hid_set_nonblocking LIBUSB_hid_set_nonblocking
#define hid_send_feature_report LIBUSB_hid_send_feature_report
#define hid_get_feature_report LIBUSB_hid_get_feature_report
#define hid_close LIBUSB_hid_close
#define hid_get_manufacturer_string LIBUSB_hid_get_manufacturer_string
#define hid_get_product_string LIBUSB_hid_get_product_string
#define hid_get_serial_number_string LIBUSB_hid_get_serial_number_string
#define hid_get_indexed_string LIBUSB_hid_get_indexed_string
#define hid_error LIBUSB_hid_error
#define new_hid_device LIBUSB_new_hid_device
#define free_hid_device LIBUSB_free_hid_device
#define input_report LIBUSB_input_report
#define return_data LIBUSB_return_data
#define make_path LIBUSB_make_path
#define read_thread LIBUSB_read_thread
#ifndef __FreeBSD__
/* this is awkwardly inlined, so we need to re-implement it here
* so we can override the libusb_control_transfer call */
static int SDL_libusb_get_string_descriptor(libusb_device_handle *dev,
uint8_t descriptor_index, uint16_t lang_id,
unsigned char *data, int length)
{
return libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN | 0x0, LIBUSB_REQUEST_GET_DESCRIPTOR, (LIBUSB_DT_STRING << 8) | descriptor_index, lang_id,
data, (uint16_t)length, 1000); /* Endpoint 0 IN */
}
#define libusb_get_string_descriptor SDL_libusb_get_string_descriptor
#endif /* __FreeBSD__ */
#undef HIDAPI_H__
#include "libusb/hid.c"
#undef libusb_init
#undef libusb_exit
#undef libusb_get_device_list
#undef libusb_free_device_list
#undef libusb_get_device_descriptor
#undef libusb_get_active_config_descriptor
#undef libusb_get_config_descriptor
#undef libusb_free_config_descriptor
#undef libusb_get_bus_number
#undef libusb_get_device_address
#undef libusb_open
#undef libusb_close
#undef libusb_claim_interface
#undef libusb_release_interface
#undef libusb_kernel_driver_active
#undef libusb_detach_kernel_driver
#undef libusb_attach_kernel_driver
#undef libusb_set_interface_alt_setting
#undef libusb_alloc_transfer
#undef libusb_submit_transfer
#undef libusb_cancel_transfer
#undef libusb_free_transfer
#undef libusb_control_transfer
#undef libusb_interrupt_transfer
#undef libusb_handle_events
#undef libusb_handle_events_completed
#undef libusb_error_name
#undef hid_device
#undef hid_device_
#undef hid_init
#undef hid_exit
#undef hid_enumerate
#undef hid_free_enumeration
#undef hid_open
#undef hid_open_path
#undef hid_write
#undef hid_read_timeout
#undef hid_read
#undef hid_set_nonblocking
#undef hid_send_feature_report
#undef hid_get_feature_report
#undef hid_close
#undef hid_get_manufacturer_string
#undef hid_get_product_string
#undef hid_get_serial_number_string
#undef hid_get_indexed_string
#undef hid_error
#undef new_hid_device
#undef free_hid_device
#undef input_report
#undef return_data
#undef make_path
#undef read_thread
/* If the platform has any backend other than libusb, try to avoid using
* libusb as the main backend for devices, since it detaches drivers and
* therefore makes devices inaccessible to the rest of the OS.
*
* We do this by whitelisting devices we know to be accessible _exclusively_
* via libusb; these are typically devices that look like HIDs but have a
* quirk that requires direct access to the hardware.
*/
static const struct {
Uint16 vendor;
Uint16 product;
} SDL_libusb_whitelist[] = {
{ 0x057e, 0x0337 } /* Nintendo WUP-028, Wii U/Switch GameCube Adapter */
};
static SDL_bool
IsInWhitelist(Uint16 vendor, Uint16 product)
{
int i;
for (i = 0; i < SDL_arraysize(SDL_libusb_whitelist); i += 1) {
if (vendor == SDL_libusb_whitelist[i].vendor &&
product == SDL_libusb_whitelist[i].product) {
return SDL_TRUE;
}
}
return SDL_FALSE;
}
#if defined(HAVE_PLATFORM_BACKEND) || HAVE_DRIVER_BACKEND
static const SDL_bool use_libusb_whitelist_default = SDL_TRUE;
#else
static const SDL_bool use_libusb_whitelist_default = SDL_FALSE;
#endif /* HAVE_PLATFORM_BACKEND || HAVE_DRIVER_BACKEND */
static SDL_bool use_libusb_whitelist = use_libusb_whitelist_default;
#endif /* HAVE_LIBUSB */
#endif /* !SDL_HIDAPI_DISABLED */
/* Shared HIDAPI Implementation */
struct hidapi_backend
{
int (*hid_write)(void *device, const unsigned char *data, size_t length);
int (*hid_read_timeout)(void *device, unsigned char *data, size_t length, int milliseconds);
int (*hid_read)(void *device, unsigned char *data, size_t length);
int (*hid_set_nonblocking)(void *device, int nonblock);
int (*hid_send_feature_report)(void *device, const unsigned char *data, size_t length);
int (*hid_get_feature_report)(void *device, unsigned char *data, size_t length);
void (*hid_close)(void *device);
int (*hid_get_manufacturer_string)(void *device, wchar_t *string, size_t maxlen);
int (*hid_get_product_string)(void *device, wchar_t *string, size_t maxlen);
int (*hid_get_serial_number_string)(void *device, wchar_t *string, size_t maxlen);
int (*hid_get_indexed_string)(void *device, int string_index, wchar_t *string, size_t maxlen);
const wchar_t *(*hid_error)(void *device);
};
#ifdef HAVE_PLATFORM_BACKEND
static const struct hidapi_backend PLATFORM_Backend = {
(void *)PLATFORM_hid_write,
(void *)PLATFORM_hid_read_timeout,
(void *)PLATFORM_hid_read,
(void *)PLATFORM_hid_set_nonblocking,
(void *)PLATFORM_hid_send_feature_report,
(void *)PLATFORM_hid_get_feature_report,
(void *)PLATFORM_hid_close,
(void *)PLATFORM_hid_get_manufacturer_string,
(void *)PLATFORM_hid_get_product_string,
(void *)PLATFORM_hid_get_serial_number_string,
(void *)PLATFORM_hid_get_indexed_string,
(void *)PLATFORM_hid_error
};
#endif /* HAVE_PLATFORM_BACKEND */
#if HAVE_DRIVER_BACKEND
static const struct hidapi_backend DRIVER_Backend = {
(void *)DRIVER_hid_write,
(void *)DRIVER_hid_read_timeout,
(void *)DRIVER_hid_read,
(void *)DRIVER_hid_set_nonblocking,
(void *)DRIVER_hid_send_feature_report,
(void *)DRIVER_hid_get_feature_report,
(void *)DRIVER_hid_close,
(void *)DRIVER_hid_get_manufacturer_string,
(void *)DRIVER_hid_get_product_string,
(void *)DRIVER_hid_get_serial_number_string,
(void *)DRIVER_hid_get_indexed_string,
(void *)DRIVER_hid_error
};
#endif /* HAVE_DRIVER_BACKEND */
#ifdef HAVE_LIBUSB
static const struct hidapi_backend LIBUSB_Backend = {
(void *)LIBUSB_hid_write,
(void *)LIBUSB_hid_read_timeout,
(void *)LIBUSB_hid_read,
(void *)LIBUSB_hid_set_nonblocking,
(void *)LIBUSB_hid_send_feature_report,
(void *)LIBUSB_hid_get_feature_report,
(void *)LIBUSB_hid_close,
(void *)LIBUSB_hid_get_manufacturer_string,
(void *)LIBUSB_hid_get_product_string,
(void *)LIBUSB_hid_get_serial_number_string,
(void *)LIBUSB_hid_get_indexed_string,
(void *)LIBUSB_hid_error
};
#endif /* HAVE_LIBUSB */
struct SDL_hid_device_
{
const void *magic;
void *device;
const struct hidapi_backend *backend;
};
static char device_magic;
#if defined(HAVE_PLATFORM_BACKEND) || HAVE_DRIVER_BACKEND || defined(HAVE_LIBUSB)
static SDL_hid_device *CreateHIDDeviceWrapper(void *device, const struct hidapi_backend *backend)
{
SDL_hid_device *wrapper = (SDL_hid_device *)SDL_malloc(sizeof(*wrapper));