Changeset 27a0012 in mainline

Timestamp:

2011-02-20T17:01:39Z (13 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

18cb870

Parents:

95120c3

Message:

Add local implementation of get_interface

Location:

uspace/lib/usb

Files:

• include/usb/pipes.h (modified) (1 diff)
• src/pipes.c (modified) (1 diff)

uspace/lib/usb/include/usb/pipes.h

@@ -122 +122 @@
     devman_handle_t, usb_address_t);
 
+int usb_device_get_assigned_interface(device_t *);
+
 int usb_endpoint_pipe_initialize(usb_endpoint_pipe_t *,
     usb_device_connection_t *,

uspace/lib/usb/src/pipes.c

@@ -60 +60 @@
 }
 
+/** Tell USB interface assigned to given device.
+ *
+ * @param device Device in question.
+ * @return Interface number (negative code means any).
+ */
+int usb_device_get_assigned_interface(device_t *device)
+{
+        int parent_phone = devman_parent_device_connect(device->handle,
+            IPC_FLAG_BLOCKING);
+        if (parent_phone < 0) {
+                return -1;
+        }
+
+        sysarg_t iface_no;
+        int rc = async_req_2_1(parent_phone, DEV_IFACE_ID(USB_DEV_IFACE),
+            IPC_M_USB_GET_INTERFACE,
+            device->handle, &iface_no);
+
+        async_hangup(parent_phone);
+
+        if (rc != EOK) {
+                return -1;
+        }
+
+        return (int) iface_no;
+}
+
 /** Initialize connection to USB device.
  *