usb_spi: Remove stm32spi.py since no one uses it

BUG=chromium:1031705
BRANCH=master
TEST=None

Signed-off-by: kerker <kerker@chromium.org>
Change-Id: Idf4f5342da6b3f3307e1948c165d44b83031543a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2425983
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@chromium.org>

1 files changed, 0 insertions, 140 deletions

diff --git a/extra/usb_spi/stm32spi.py b/extra/usb_spi/stm32spi.py
deleted file mode 100755
index a8948c0002..0000000000
--- a/extra/usb_spi/stm32spi.py
+++ /dev/null
@@ -1,140 +0,0 @@
-#!/usr/bin/env python2
-# Copyright 2016 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-
-# Test program to access SPI via stm32 raiden debug spi.
-
-import usb
-import usb.core
-import usb.util
-
-class SSpiBus(object):
-  """SPI bus class to access devices on the bus.
-
-  Usage:
-    bus = SSpiBus()
-    # read 1 byte from register(0x16)
-    bus.wr_rd([0x16], 1)
-    # write 2 bytes to register(0x20)
-    bus.wr_rd([0x20, 0x01, 0x02])
-
-  Instance Variables:
-    _dev: pyUSB device object
-    _read_ep: pyUSB read endpoint for this interface
-    _write_ep: pyUSB write endpoint for this interface
-  """
-  def __init__(self, vendor=0x18d1,
-               product=0x501a, interface=2, serialname=None):
-    # Find the stm32.
-    dev = usb.core.find(idVendor=vendor, idProduct=product)
-    if dev is None:
-      raise Exception("SPI", "USB device not found")
-
-    print "Found stm32: %04x:%04x" % (vendor, product)
-    self._dev = dev
-
-    # Get an endpoint instance.
-    cfg = dev.get_active_configuration()
-    intf = usb.util.find_descriptor(cfg, bInterfaceNumber=interface)
-    self._intf = intf
-    print "InterfaceNumber: %s" % intf.bInterfaceNumber
-
-    read_ep = usb.util.find_descriptor(
-        intf,
-        # match the first IN endpoint
-        custom_match=\
-        lambda e: \
-            usb.util.endpoint_direction(e.bEndpointAddress) == \
-            usb.util.ENDPOINT_IN
-    )
-
-    self._read_ep = read_ep
-    print "Reader endpoint: 0x%x" % read_ep.bEndpointAddress
-
-    write_ep = usb.util.find_descriptor(
-        intf,
-        # match the first OUT endpoint
-        custom_match=\
-        lambda e: \
-            usb.util.endpoint_direction(e.bEndpointAddress) == \
-            usb.util.ENDPOINT_OUT
-    )
-
-    self._write_ep = write_ep
-    print "Writer endpoint: 0x%x" % write_ep.bEndpointAddress
-
-    self.enable(True)
-    print "Set up stm32 spi"
-
-  def enable(self, enable):
-    # USB_RIR_OUT = 0 | USB_TYPE_VENDOR = (0x02 << 5) |
-    #     USB_RECIP_INTERFACE = 0x01
-    bmRequestType = 0x41
-    # USB_SPI_REQ_ENABLE  = 0x0000, USB_SPI_REQ_DISABLE = 0x0001
-    if enable:
-      bmRequest = 0x0
-    else:
-      bmRequest = 0x1
-
-    print "ctrl_transfer(0x%x, 0x%x, 0, 0x%x, null)" % (
-        bmRequestType, bmRequest, self._intf.bInterfaceNumber)
-    ret = self._dev.ctrl_transfer(
-        bmRequestType, bmRequest, 0, self._intf.bInterfaceNumber, '')
-    print "ctrl_transfer ret - %s" % ret
-
-
-
-
-  def wr_rd(self, write_list, read_count=None):
-    """Implements hdctools wr_rd() interface.
-
-    This function writes byte values list to I2C device, then reads
-    byte values from the same device.
-
-    Args:
-      write_list: list of output byte values [0~255].
-      read_count: number of byte values to read from device.
-
-    Interface:
-      write: [write_count, read_count, data ... ]
-      read: [data .. ]
-    """
-    print "SSpi.wr_rd(write_list=%s, read_count=%s)" % (
-        write_list, read_count)
-
-    # Clean up args from python style to correct types.
-    write_length = 0
-    if write_list:
-      write_length = len(write_list)
-    if not read_count:
-      read_count = 0
-
-    # Send wr_rd command to stm32.
-    cmd = [write_length, read_count] + write_list
-    print "WR: %s" % cmd
-    ret = self._write_ep.write(cmd, 100)
-
-    print "RET: %s " % ret
-
-    # Read back response if necessary.
-    bytesread = self._read_ep.read(read_count + 2, 1000)
-    print "BYTES: %s " % bytesread
-
-    if len(bytesread) < 2:
-      raise Exception("SPI", "Read status failed.")
-
-    print "STATUS: 0x%02x%02x" % (int(bytesread[1]), int(bytesread[0]))
-    return bytesread[2:]
-
-
-def main():
-  bus = SSpiBus()
-  # write 2 bytes to register(0x20)
-  bus.wr_rd([0x90, 0x00, 0x00, 0x00], 2)
-  # read 1 byte from register(0x16)
-  bus.wr_rd([0x9f], 3)
-
-if __name__ == "__main__":
-  main()