137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Helper functions for the Cypress EZ-USB / FX2 series chips.
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*/
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#include <libusb.h>
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#include <glib.h>
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#include <glib/gstdio.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include "libsigrok.h"
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#include "libsigrok-internal.h"
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#define LOG_PREFIX "ezusb"
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SR_PRIV int ezusb_reset(struct libusb_device_handle *hdl, int set_clear)
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{
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int ret;
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unsigned char buf[1];
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sr_info("setting CPU reset mode %s...",
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set_clear ? "on" : "off");
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buf[0] = set_clear ? 1 : 0;
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ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR, 0xa0,
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0xe600, 0x0000, buf, 1, 100);
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if (ret < 0)
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sr_err("Unable to send control request: %s.",
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libusb_error_name(ret));
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return ret;
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}
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SR_PRIV int ezusb_install_firmware(libusb_device_handle *hdl,
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const char *filename)
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{
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FILE *fw;
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int offset, chunksize, ret, result;
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unsigned char buf[4096];
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sr_info("Uploading firmware at %s", filename);
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if ((fw = g_fopen(filename, "rb")) == NULL) {
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sr_err("Unable to open firmware file %s for reading: %s",
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filename, strerror(errno));
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return SR_ERR;
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}
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result = SR_OK;
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offset = 0;
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while (1) {
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chunksize = fread(buf, 1, 4096, fw);
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if (chunksize == 0)
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break;
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ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR |
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LIBUSB_ENDPOINT_OUT, 0xa0, offset,
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0x0000, buf, chunksize, 100);
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if (ret < 0) {
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sr_err("Unable to send firmware to device: %s.",
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libusb_error_name(ret));
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result = SR_ERR;
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break;
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}
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sr_info("Uploaded %d bytes", chunksize);
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offset += chunksize;
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}
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fclose(fw);
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sr_info("Firmware upload done");
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return result;
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}
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SR_PRIV int ezusb_upload_firmware(libusb_device *dev, int configuration,
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const char *filename)
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{
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struct libusb_device_handle *hdl;
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int ret;
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sr_info("uploading firmware to device on %d.%d",
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libusb_get_bus_number(dev), libusb_get_device_address(dev));
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if ((ret = libusb_open(dev, &hdl)) < 0) {
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sr_err("failed to open device: %s.", libusb_error_name(ret));
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return SR_ERR;
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}
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/*
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* The libusbx darwin backend is broken: it can report a kernel driver being
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* active, but detaching it always returns an error.
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*/
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#if !defined(__APPLE__)
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if (libusb_kernel_driver_active(hdl, 0) == 1) {
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if ((ret = libusb_detach_kernel_driver(hdl, 0)) < 0) {
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sr_err("failed to detach kernel driver: %s",
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libusb_error_name(ret));
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return SR_ERR;
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}
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}
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#endif
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if ((ret = libusb_set_configuration(hdl, configuration)) < 0) {
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sr_err("Unable to set configuration: %s",
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libusb_error_name(ret));
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return SR_ERR;
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}
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if ((ezusb_reset(hdl, 1)) < 0)
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return SR_ERR;
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if (ezusb_install_firmware(hdl, filename) < 0)
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return SR_ERR;
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if ((ezusb_reset(hdl, 0)) < 0)
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return SR_ERR;
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libusb_close(hdl);
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return SR_OK;
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}
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