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Claim the interface before doing bulk transfers

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This commit is contained in:
Sam Lantinga
2025-08-27 12:40:05 -07:00
parent a798da2ec7
commit 2bb51e1340
1 changed files with 55 additions and 52 deletions
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107
src/hidapi/libusb/hid.c
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@@ -1337,64 +1337,67 @@ static bool is_ns2(unsigned short idVendor, unsigned short idProduct)
return false;
}
static bool ns2_find_bulk_out_endpoint(libusb_device_handle* handle, uint8_t* endpoint_out)
static void init_ns2(libusb_device_handle *device_handle, const struct libusb_config_descriptor *conf_desc)
{
struct libusb_config_descriptor* config;
if (libusb_get_config_descriptor(libusb_get_device(handle), 0, &config) != 0) {
return false;
}
int j, k, l, res;
for (int i = 0; i < config->bNumInterfaces; i++) {
const struct libusb_interface* iface = &config->interface[i];
for (int j = 0; j < iface->num_altsetting; j++) {
const struct libusb_interface_descriptor* altsetting = &iface->altsetting[j];
if (altsetting->bInterfaceNumber == 1) {
for (int k = 0; k < altsetting->bNumEndpoints; k++) {
const struct libusb_endpoint_descriptor* ep = &altsetting->endpoint[k];
for (j = 0; j < conf_desc->bNumInterfaces; j++) {
const struct libusb_interface *intf = &conf_desc->interface[j];
for (k = 0; k < intf->num_altsetting; k++) {
const struct libusb_interface_descriptor *intf_desc = &intf->altsetting[k];
if (intf_desc->bInterfaceNumber == 1) {
uint8_t endpoint = 0;
for (l = 0; l < intf_desc->bNumEndpoints; l++) {
const struct libusb_endpoint_descriptor* ep = &intf_desc->endpoint[l];
if ((ep->bmAttributes & LIBUSB_TRANSFER_TYPE_MASK) == LIBUSB_TRANSFER_TYPE_BULK && (ep->bEndpointAddress & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_OUT) {
*endpoint_out = ep->bEndpointAddress;
libusb_free_config_descriptor(config);
return true;
endpoint = ep->bEndpointAddress;
break;
}
}
if (endpoint) {
res = libusb_claim_interface(device_handle, intf_desc->bInterfaceNumber);
if (res < 0) {
LOG("can't claim interface %d: %d\n", intf_desc->bInterfaceNumber, res);
continue;
}
const unsigned char DEFAULT_REPORT_DATA[] = {
0x03, 0x91, 0x00, 0x0d, 0x00, 0x08,
0x00, 0x00, 0x01, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};
const unsigned char SET_LED_DATA[] = {
0x09, 0x91, 0x00, 0x07, 0x00, 0x08,
0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
int transferred;
res = libusb_bulk_transfer(device_handle,
endpoint,
(unsigned char*)DEFAULT_REPORT_DATA,
sizeof(DEFAULT_REPORT_DATA),
&transferred,
1000);
if (res < 0) {
LOG("can't set report data: %d\n", res);
}
res = libusb_bulk_transfer(device_handle,
endpoint,
(unsigned char*)SET_LED_DATA,
sizeof(SET_LED_DATA),
&transferred,
1000);
if (res < 0) {
LOG("can't set LED data: %d\n", res);
}
libusb_release_interface(device_handle, intf_desc->bInterfaceNumber);
return;
}
}
}
}
libusb_free_config_descriptor(config);
return false;
}
static void init_ns2(libusb_device_handle *device_handle)
{
const unsigned char DEFAULT_REPORT_DATA[] = {
0x03, 0x91, 0x00, 0x0d, 0x00, 0x08,
0x00, 0x00, 0x01, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};
const unsigned char SET_LED_DATA[] = {
0x09, 0x91, 0x00, 0x07, 0x00, 0x08,
0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
uint8_t endpoint_out = 0;
if (!ns2_find_bulk_out_endpoint(device_handle, &endpoint_out)) {
return;
}
int transferred;
libusb_bulk_transfer(device_handle,
endpoint_out,
(unsigned char*)DEFAULT_REPORT_DATA,
sizeof(DEFAULT_REPORT_DATA),
&transferred,
1000);
libusb_bulk_transfer(device_handle,
endpoint_out,
(unsigned char*)SET_LED_DATA,
sizeof(SET_LED_DATA),
&transferred,
1000);
}
static void calculate_device_quirks(hid_device *dev, unsigned short idVendor, unsigned short idProduct)
@@ -1458,9 +1461,9 @@ static int hidapi_initialize_device(hid_device *dev, const struct libusb_interfa
init_xboxone(dev->device_handle, desc.idVendor, desc.idProduct, conf_desc);
}
/* Initialize NSO GameCube controllers */
/* Initialize Nintendo Switch 2 controllers */
if (is_ns2(desc.idVendor, desc.idProduct)) {
init_ns2(dev->device_handle);
init_ns2(dev->device_handle, conf_desc);
}
/* Store off the string descriptor indexes */