diff --git a/kernel/trunk/bus/usb/pipe.inc b/kernel/trunk/bus/usb/pipe.inc
index 087fd19cf0..dfd7bbaaeb 100644
--- a/kernel/trunk/bus/usb/pipe.inc
+++ b/kernel/trunk/bus/usb/pipe.inc
@@ -697,6 +697,36 @@ endl
         ret
 endp
 
+; Part of API for drivers, see documentation for USBGetParam.
+proc usb_get_param
+virtual at esp
+                dd      ?       ; return address
+.pipe           dd      ?
+.param          dd      ?
+end virtual
+        mov     edx, [.param]
+        mov     ecx, [.pipe]
+        mov     eax, [ecx+usb_pipe.DeviceData]
+        test    edx, edx
+        jz      .get_device_descriptor
+        dec     edx
+        jz      .get_config_descriptor
+        dec     edx
+        jz      .get_speed
+        or      eax, -1
+        ret     8
+.get_device_descriptor:
+        add     eax, usb_device_data.DeviceDescriptor
+        ret     8
+.get_config_descriptor:
+        movzx   ecx, [eax+usb_device_data.DeviceDescrSize]
+        lea     eax, [eax+ecx+usb_device_data.DeviceDescriptor]
+        ret     8
+.get_speed:
+        movzx   eax, [eax+usb_device_data.Speed]
+        ret     8
+endp
+
 ; Initialize software part of usb_gtd. Called from controller-specific code
 ; somewhere in AllocTransfer with eax -> next (inactive) usb_gtd,
 ; ebx -> usb_pipe, ebp frame from call to AllocTransfer with [.td] ->
diff --git a/kernel/trunk/core/exports.inc b/kernel/trunk/core/exports.inc
index c0ece57797..7d4bf5c085 100644
--- a/kernel/trunk/core/exports.inc
+++ b/kernel/trunk/core/exports.inc
@@ -100,6 +100,7 @@ iglobal
   szUSBClosePipe      db 'USBClosePipe',0
   szUSBNormalTransferAsync db 'USBNormalTransferAsync',0
   szUSBControlTransferAsync db 'USBControlTransferAsync',0
+  szUSBGetParam       db 'USBGetParam',0
 
   szNetRegDev         db 'NetRegDev',0
   szNetUnRegDev       db 'NetUnRegDev',0
@@ -196,6 +197,7 @@ kernel_export:
   dd szUSBClosePipe    , usb_close_pipe
   dd szUSBNormalTransferAsync, usb_normal_transfer_async
   dd szUSBControlTransferAsync, usb_control_async
+  dd szUSBGetParam     , usb_get_param
 
   dd szNetRegDev       , NET_add_device
   dd szNetUnRegDev     , NET_remove_device
diff --git a/kernel/trunk/docs/usbapi.txt b/kernel/trunk/docs/usbapi.txt
index 32fdc4be84..f3fe0f0be1 100644
--- a/kernel/trunk/docs/usbapi.txt
+++ b/kernel/trunk/docs/usbapi.txt
@@ -60,8 +60,7 @@ called several times with the same 'configdescr' and different 'interfacedescr'.
 The returned value NULL means that the initialization has failed.
 Any other value means that configuration was successful; the kernel does not
 try to interpret the value. It can be, for example, pointer to the internal
-data allocated with Kmalloc, or index in some internal table. Remember that
-Kmalloc() is NOT stdcall, it destroys ebx.
+data allocated with Kmalloc, or index in some internal table.
 
 The driver can implement the function
 
@@ -173,22 +172,20 @@ The parameter 'length' is the number of bytes transferred. For
 control transfers, this includes 8 bytes from SETUP stage, so
 0 means that SETUP stage failed and 'size'+8 means full transfer.
 The parameter 'status' is nonzero if an error occured.
-USB_STATUS_OK		= 0	; no error
-USB_STATUS_CRC		= 1	; CRC error
-USB_STATUS_BITSTUFF	= 2	; bit stuffing violation
-USB_STATUS_TOGGLE	= 3	; data toggle mismatch
-USB_STATUS_STALL	= 4	; device returned STALL
-USB_STATUS_NORESPONSE	= 5	; device not responding
-USB_STATUS_PIDCHECK	= 6	; invalid PID check bits
-USB_STATUS_WRONGPID	= 7	; unexpected PID value
-USB_STATUS_OVERRUN	= 8	; too many data from endpoint
-USB_STATUS_UNDERRUN	= 9	; too few data from endpoint
-USB_STATUS_BUFOVERRUN	= 12	; overflow of internal controller buffer
-				; possible only for isochronous transfers
-USB_STATUS_BUFUNDERRUN	= 13	; underflow of internal controller buffer
-				; possible only for isochronous transfers
-USB_STATUS_CLOSED	= 16	; pipe closed, either explicitly with USBClosePipe
-				; or due to device disconnect
+USB_STATUS_OK           = 0     ; no error
+USB_STATUS_CRC          = 1     ; CRC error
+USB_STATUS_BITSTUFF     = 2     ; bit stuffing violation
+USB_STATUS_TOGGLE       = 3     ; data toggle mismatch
+USB_STATUS_STALL        = 4     ; device returned STALL
+USB_STATUS_NORESPONSE   = 5     ; device not responding
+USB_STATUS_PIDCHECK     = 6     ; invalid PID check bits
+USB_STATUS_WRONGPID     = 7     ; unexpected PID value
+USB_STATUS_OVERRUN      = 8     ; too many data from endpoint
+USB_STATUS_UNDERRUN     = 9     ; too few data from endpoint
+USB_STATUS_BUFOVERRUN   = 12    ; overflow of internal controller buffer
+USB_STATUS_BUFUNDERRUN  = 13    ; underflow of internal controller buffer
+USB_STATUS_CLOSED       = 16    ; pipe closed, either explicitly with USBClosePipe
+                                ; or due to device disconnect
 
 If several transfers are queued for the same pipe, their callback functions
 are called in the same order as they were queued.
@@ -196,3 +193,13 @@ When a pipe is closed, either explicitly with USBClosePipe, or
 implicitly due to device disconnect, all callback functions are called
 with USB_STATUS_CLOSED. The call to DeviceDisconnected() occurs after
 all callbacks.
+
+void* __stdcall USBGetParam(void* pipe0, int param);
+Returns miscellaneous parameters of the device.
+pipe0 is the pointer to the config pipe.
+param = 0: return pointer to device descriptor
+param = 1: return pointer to config descriptor, same as passed to AddDevice
+param = 2: return speed at which the device is operating, one of
+        USB_SPEED_FS = 0 ; full-speed
+        USB_SPEED_LS = 1 ; low-speed
+        USB_SPEED_HS = 2 ; high-speed