2 * This file is part of the libsigrok project.
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * Helper functions for the Cypress EZ-USB / FX2 series chips.
27 #include <glib/gstdio.h>
31 #include <libsigrok/libsigrok.h>
32 #include "libsigrok-internal.h"
34 #define LOG_PREFIX "ezusb"
36 SR_PRIV int ezusb_reset(struct libusb_device_handle *hdl, int set_clear)
41 sr_info("setting CPU reset mode %s...",
42 set_clear ? "on" : "off");
43 buf[0] = set_clear ? 1 : 0;
44 ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR, 0xa0,
45 0xe600, 0x0000, buf, 1, 100);
47 sr_err("Unable to send control request: %s.",
48 libusb_error_name(ret));
53 SR_PRIV int ezusb_install_firmware(libusb_device_handle *hdl,
57 int offset, chunksize, ret, result;
58 unsigned char buf[4096];
60 sr_info("Uploading firmware at %s", filename);
61 if (!(fw = g_fopen(filename, "rb"))) {
62 sr_err("Unable to open firmware file %s for reading: %s",
63 filename, g_strerror(errno));
70 chunksize = fread(buf, 1, 4096, fw);
73 ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR |
74 LIBUSB_ENDPOINT_OUT, 0xa0, offset,
75 0x0000, buf, chunksize, 100);
77 sr_err("Unable to send firmware to device: %s.",
78 libusb_error_name(ret));
82 sr_info("Uploaded %d bytes", chunksize);
86 sr_info("Firmware upload done");
91 SR_PRIV int ezusb_upload_firmware(libusb_device *dev, int configuration,
94 struct libusb_device_handle *hdl;
97 sr_info("uploading firmware to device on %d.%d",
98 libusb_get_bus_number(dev), libusb_get_device_address(dev));
100 if ((ret = libusb_open(dev, &hdl)) < 0) {
101 sr_err("failed to open device: %s.", libusb_error_name(ret));
106 * The libusb Darwin backend is broken: it can report a kernel driver being
107 * active, but detaching it always returns an error.
109 #if !defined(__APPLE__)
110 if (libusb_kernel_driver_active(hdl, 0) == 1) {
111 if ((ret = libusb_detach_kernel_driver(hdl, 0)) < 0) {
112 sr_err("failed to detach kernel driver: %s",
113 libusb_error_name(ret));
119 if ((ret = libusb_set_configuration(hdl, configuration)) < 0) {
120 sr_err("Unable to set configuration: %s",
121 libusb_error_name(ret));
125 if ((ezusb_reset(hdl, 1)) < 0)
128 if (ezusb_install_firmware(hdl, filename) < 0)
131 if ((ezusb_reset(hdl, 0)) < 0)