Changes in uspace/lib/drv/include/usb_iface.h [56bdd9a4:27ed734c] in mainline

File:

• uspace/lib/drv/include/usb_iface.h (modified) (1 diff)

uspace/lib/drv/include/usb_iface.h

@@ -39 +39 @@
 
 #include "ddf/driver.h"
-#include <async.h>
 #include <usb/usb.h>
+typedef enum {
+        /** Tell USB address assigned to device.
+         * Parameters:
+         * - devman handle id
+         * Answer:
+         * - EINVAL - unknown handle or handle not managed by this driver
+         * - ENOTSUP - operation not supported (shall not happen)
+         * - arbitrary error code if returned by remote implementation
+         * - EOK - handle found, first parameter contains the USB address
+         *
+         * The handle must be the one used for binding USB address with
+         * it (IPC_M_USBHC_BIND_ADDRESS), otherwise the host controller
+         * (that this request would eventually reach) would not be able
+         * to find it.
+         * The problem is that this handle is actually assigned to the
+         * function inside driver of the parent device (usually hub driver).
+         * To bypass this problem, the initial caller specify handle as
+         * zero and the first parent assigns the actual value.
+         * See usb_iface_get_address_hub_child_impl() implementation
+         * that could be assigned to device ops of a child device of in a
+         * hub driver.
+         * For example, the USB multi interface device driver (MID)
+         * passes this initial zero without any modification because the
+         * handle must be resolved by its parent.
+         */
+        IPC_M_USB_GET_MY_ADDRESS,
 
-int usb_get_my_address(async_exch_t *, usb_address_t *);
-int usb_get_my_interface(async_exch_t *, int *);
-int usb_get_hc_handle(async_exch_t *, devman_handle_t *);
+        /** Tell interface number given device can use.
+         * Parameters
+         * - devman handle id of the device
+         * Answer:
+         * - ENOTSUP - operation not supported (can also mean any interface)
+         * - EOK - operation okay, first parameter contains interface number
+         */
+        IPC_M_USB_GET_INTERFACE,
+
+        /** Tell devman handle of device host controller.
+         * Parameters:
+         * - none
+         * Answer:
+         * - EOK - request processed without errors
+         * - ENOTSUP - this indicates invalid USB driver
+         * Parameters of the answer:
+         * - devman handle of HC caller is physically connected to
+         */
+        IPC_M_USB_GET_HOST_CONTROLLER_HANDLE
+} usb_iface_funcs_t;
 
 /** USB device communication interface. */
 typedef struct {
         int (*get_my_address)(ddf_fun_t *, usb_address_t *);
-        int (*get_my_interface)(ddf_fun_t *, int *);
+        int (*get_interface)(ddf_fun_t *, devman_handle_t, int *);
         int (*get_hc_handle)(ddf_fun_t *, devman_handle_t *);
 } usb_iface_t;
+
 
 #endif