libusbhost: Support for multiple pending requests on a single endpoint
Add new usb_request struct to replace usb_endpoint, which is no longer needed.
Change-Id: Ia3637b3431a3597caced41bfec677ef0b044a453
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/include/usbhost/usbhost.h b/include/usbhost/usbhost.h
index 4a8a4fc..3deb182 100644
--- a/include/usbhost/usbhost.h
+++ b/include/usbhost/usbhost.h
@@ -39,6 +39,17 @@
unsigned char* curr_desc;
};
+struct usb_request
+{
+ struct usb_device *dev;
+ void* buffer;
+ int buffer_length;
+ int actual_length;
+ int max_packet_size;
+ void *private_data; /* struct usbdevfs_urb* */
+ void *client_data; /* free for use by client */
+};
+
/* Callback for notification when new USB devices are attached.
* Return true to exit from usb_host_run.
*/
@@ -170,38 +181,23 @@
/* Releases the specified interface of a USB device */
int usb_device_release_interface(struct usb_device *device, unsigned int interface);
+/* Creates a new usb_request. */
+struct usb_request *usb_request_new(struct usb_device *dev,
+ const struct usb_endpoint_descriptor *ep_desc);
-/* Creates a new usb_endpoint for the specified endpoint of a USB device.
- * This can be used to read or write data across the endpoint.
- */
-struct usb_endpoint *usb_endpoint_open(struct usb_device *dev,
- const struct usb_endpoint_descriptor *desc);
+/* Releases all resources associated with the request */
+void usb_request_free(struct usb_request *req);
-/* Releases all resources associated with the endpoint */
-void usb_endpoint_close(struct usb_endpoint *ep);
+/* Submits a read or write request on the specified device */
+int usb_request_queue(struct usb_request *req);
-/* Begins a read or write operation on the specified endpoint */
-int usb_endpoint_queue(struct usb_endpoint *ep, void *data, int len);
-
- /* Waits for the results of a previous usb_endpoint_queue operation on the
- * specified endpoint. Returns number of bytes transferred, or a negative
- * value for error.
+ /* Waits for the results of a previous usb_request_queue operation.
+ * Returns a usb_request, or NULL for error.
*/
-int usb_endpoint_wait(struct usb_device *device, int *out_ep_num);
+struct usb_request *usb_request_wait(struct usb_device *dev);
-/* Cancels a pending usb_endpoint_queue() operation on an endpoint. */
-int usb_endpoint_cancel(struct usb_endpoint *ep);
-
-/* Returns the usb_device for the given endpoint */
-struct usb_device *usb_endpoint_get_device(struct usb_endpoint *ep);
-
-/* Returns the endpoint address for the given endpoint */
-int usb_endpoint_number(struct usb_endpoint *ep);
-
-/* Returns the maximum packet size for the given endpoint.
- * For bulk endpoints this should be 512 for highspeed or 64 for fullspeed.
- */
-int usb_endpoint_max_packet(struct usb_endpoint *ep);
+/* Cancels a pending usb_request_queue() operation. */
+int usb_request_cancel(struct usb_request *req);
#ifdef __cplusplus
}