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Reattach the kernel driver after closing USB controllers

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This commit is contained in:
Sam Lantinga 2020-01-17 10:43:14 -08:00
parent 005e2dff21
commit 4e682461cc
3 changed files with 25 additions and 0 deletions
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3
src/hidapi/SDL_hidapi.c
View file

@ -165,6 +165,7 @@ static struct
int (*release_interface)(libusb_device_handle *dev_handle, int interface_number);
int (*kernel_driver_active)(libusb_device_handle *dev_handle, int interface_number);
int (*detach_kernel_driver)(libusb_device_handle *dev_handle, int interface_number);
int (*attach_kernel_driver)(libusb_device_handle *dev_handle, int interface_number);
int (*set_interface_alt_setting)(libusb_device_handle *dev, int interface_number, int alternate_setting);
struct libusb_transfer * (*alloc_transfer)(int iso_packets);
int (*submit_transfer)(struct libusb_transfer *transfer);
@ -208,6 +209,7 @@ static struct
#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
@ -474,6 +476,7 @@ int HID_API_EXPORT HID_API_CALL hid_init(void)
LOAD_LIBUSB_SYMBOL(release_interface)
LOAD_LIBUSB_SYMBOL(kernel_driver_active)
LOAD_LIBUSB_SYMBOL(detach_kernel_driver)
LOAD_LIBUSB_SYMBOL(attach_kernel_driver)
LOAD_LIBUSB_SYMBOL(set_interface_alt_setting)
LOAD_LIBUSB_SYMBOL(alloc_transfer)
LOAD_LIBUSB_SYMBOL(submit_transfer)

14
src/hidapi/libusb/hid.c
View file

@ -141,6 +141,7 @@ struct hid_device_ {
/* The interface number of the HID */
int interface;
int detached_driver;
/* Indexes of Strings */
int manufacturer_index;
@ -983,6 +984,8 @@ hid_device * HID_API_EXPORT hid_open_path(const char *path, int bExclusive)
if (should_enumerate_interface(desc.idVendor, intf_desc)) {
char *dev_path = make_path(usb_dev, intf_desc->bInterfaceNumber);
if (!strcmp(dev_path, path)) {
int detached_driver = 0;
/* Matched Paths. Open this device */
/* OPEN HERE */
@ -1006,6 +1009,7 @@ hid_device * HID_API_EXPORT hid_open_path(const char *path, int bExclusive)
good_open = 0;
break;
}
detached_driver = 1;
}
#endif
@ -1030,6 +1034,7 @@ hid_device * HID_API_EXPORT hid_open_path(const char *path, int bExclusive)
/* Store off the interface number */
dev->interface = intf_desc->bInterfaceNumber;
dev->detached_driver = detached_driver;
/* Find the INPUT and OUTPUT endpoints. An
OUTPUT endpoint is not required. */
@ -1335,6 +1340,15 @@ void HID_API_EXPORT hid_close(hid_device *dev)
/* release the interface */
libusb_release_interface(dev->device_handle, dev->interface);
#ifdef DETACH_KERNEL_DRIVER
/* Re-attach kernel driver if necessary. */
if (dev->detached_driver) {
int res = libusb_attach_kernel_driver(dev->device_handle, dev->interface);
if (res < 0)
LOG("Couldn't re-attach kernel driver.\n");
}
#endif
/* Close the handle */
libusb_close(dev->device_handle);

8
src/joystick/hidapi/SDL_hidapijoystick.c
View file

@ -844,6 +844,14 @@ HIDAPI_IsDevicePresent(Uint16 vendor_id, Uint16 product_id, Uint16 version, cons
}
SDL_UnlockJoysticks();
/* If we're looking for the wireless XBox 360 controller, also look for the dongle */
if (!result && vendor_id == 0x045e && product_id == 0x02a1) {
return HIDAPI_IsDevicePresent(0x045e, 0x0719, version, name);
}
#ifdef DEBUG_HIDAPI
SDL_Log("HIDAPI_IsDevicePresent() returning %s for 0x%.4x / 0x%.4x\n", result ? "true" : "false", vendor_id, product_id);
#endif
return result;
}