add XFlash.py host tool (doesn't do much for the moment)

picflash/host/XFlash.py

@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+import usb
+import sys
+import struct
+import pprint
+
+pp = pprint.PrettyPrinter()
+
+class XFlash:
+  def __init__(self, usbdev):
+    self.devhandle = usbdev.open()
+    self.devhandle.setConfiguration(1)
+    self.devhandle.claimInterface(0)
+
+    self.ep_out = 0x05
+    self.ep_in  = 0x82
+
+  def __del__(self):
+    try:
+      self.devhandle.releaseInterface(0)
+      del self.devhandle
+    except:
+      pass
+
+  def cmd(self, cmd, argA=0, argB=0):
+    buffer = struct.pack("LL", argA, argB)
+
+    self.devhandle.controlMsg(requestType = usb.TYPE_VENDOR,
+                              request     = cmd,
+                              value       = 0x00,
+                              index       = 0x00,
+                              buffer      = buffer)
+
+  def flashInit(self):
+    self.cmd(0x03)
+
+    buffer = self.devhandle.bulkRead(self.ep_in, 4, 1000)
+    buffer = ''.join([chr(x) for x in buffer])
+
+    return struct.unpack("L", buffer)[0]
+
+  def flashDeInit(self):
+    self.cmd(0x04)    
+
+  def flashStatus(self):
+    self.cmd(0x05)
+
+    buffer = self.devhandle.bulkRead(self.ep_in, 4, 1000)
+    buffer = ''.join([chr(x) for x in buffer])
+
+    return struct.unpack("L", buffer)[0]
+
+
+usbdev = None
+
+for bus in usb.busses():
+  for dev in bus.devices:
+    if dev.idVendor == 0xFFFF and dev.idProduct == 4:
+    	usbdev = dev
+
+if not usbdev:
+  print "XFlash USB hardware not found."
+  sys.exit(1)
+
+print "Using XFlash @ [%s]" % (usbdev.filename)
+
+xf = XFlash(usbdev)
+
+try:
+  print "FlashConfig: 0x%08x" % (xf.flashInit())
+  print "FlashStatus: 0x%08x" % (xf.flashStatus())
+except:
+  xf.flashDeInit()
+