add TargetClass support

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

main.c

@@ -215,6 +215,7 @@ parse_interface_config(libusb_device *dev, struct usbdev_data *data)
 
 	alt = &iface->altsetting[0];
 	data->interface = alt->bInterfaceNumber;
+	data->dev_class = alt->bInterfaceClass;
 
 	for (i = 0; i < alt->bNumEndpoints; i++) {
 		const struct libusb_endpoint_descriptor *ep = &alt->endpoint[i];

switch.c

@@ -11,6 +11,7 @@ enum {
 	DATA_RELEASE_DELAY,
 	DATA_CONFIG,
 	DATA_ALT,
+	DATA_DEV_CLASS,
 	__DATA_MAX
 };
 
@@ -410,12 +411,17 @@ void handle_switch(struct usbdev_data *data)
 		[DATA_RESPONSE] = { .name = "response", .type = BLOBMSG_TYPE_BOOL },
 		[DATA_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_INT32 },
 		[DATA_ALT] = { .name = "alt", .type = BLOBMSG_TYPE_INT32 },
+		[DATA_DEV_CLASS] = { .name = "t_class", .type = BLOBMSG_TYPE_INT32 },
 	};
 	struct blob_attr *tb[__DATA_MAX];
 	int mode = MODE_GENERIC;
+	int t_class = 0;
 
 	blobmsg_parse(data_policy, __DATA_MAX, tb, blobmsg_data(data->info), blobmsg_data_len(data->info));
 
+	if (tb[DATA_DEV_CLASS])
+		t_class = blobmsg_get_u32(tb[DATA_DEV_CLASS]);
+
 	if (tb[DATA_INTERFACE])
 		data->interface = blobmsg_get_u32(tb[DATA_INTERFACE]);
 
@@ -431,6 +437,9 @@ void handle_switch(struct usbdev_data *data)
 	if (tb[DATA_RESPONSE])
 		data->need_response = blobmsg_get_bool(tb[DATA_RESPONSE]);
 
+	if (t_class > 0 && data->dev_class != t_class)
+		return;
+
 	if (tb[DATA_MODE]) {
 		const char *modestr;
 		int i;

switch.h

@@ -14,6 +14,7 @@ struct usbdev_data {
 	int msg_endpoint;
 	int response_endpoint;
 	int release_delay;
+	int dev_class;
 	bool need_response;
 
 	char idstr[10];