libsigrok/hardware/common/ezusb.c

129 lines
3.3 KiB
C

/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Helper functions for the Cypress EZ-USB / FX2 series chips.
*/
#include <libusb.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "sigrok.h"
#include "sigrok-internal.h"
SR_PRIV int ezusb_reset(struct libusb_device_handle *hdl, int set_clear)
{
int ret;
unsigned char buf[1];
sr_info("ezusb: setting CPU reset mode %s...",
set_clear ? "on" : "off");
buf[0] = set_clear ? 1 : 0;
ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR, 0xa0,
0xe600, 0x0000, buf, 1, 100);
if (ret < 0)
sr_err("ezusb: Unable to send control request: %d", ret);
return ret;
}
SR_PRIV int ezusb_install_firmware(libusb_device_handle *hdl,
const char *filename)
{
FILE *fw;
int offset, chunksize, ret, result;
unsigned char buf[4096];
sr_info("ezusb: Uploading firmware at %s", filename);
if ((fw = g_fopen(filename, "rb")) == NULL) {
sr_err("ezusb: Unable to open firmware file %s for reading: %s",
filename, strerror(errno));
return SR_ERR;
}
result = SR_OK;
offset = 0;
while (1) {
chunksize = fread(buf, 1, 4096, fw);
if (chunksize == 0)
break;
ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR |
LIBUSB_ENDPOINT_OUT, 0xa0, offset,
0x0000, buf, chunksize, 100);
if (ret < 0) {
sr_err("ezusb: Unable to send firmware to device: %d",
ret);
result = SR_ERR;
break;
}
sr_info("ezusb: Uploaded %d bytes", chunksize);
offset += chunksize;
}
fclose(fw);
sr_info("ezusb: Firmware upload done");
return result;
}
SR_PRIV int ezusb_upload_firmware(libusb_device *dev, int configuration,
const char *filename)
{
struct libusb_device_handle *hdl;
int ret;
sr_info("ezusb: uploading firmware to device on %d.%d",
libusb_get_bus_number(dev), libusb_get_device_address(dev));
if ((ret = libusb_open(dev, &hdl)) < 0) {
sr_err("ezusb: failed to open device: %d", ret);
return SR_ERR;
}
/* Neither Windows/MinGW nor Darwin/Mac support these libusb-1.0 calls. */
#if !defined(_WIN32) && !defined(__APPLE__)
if (libusb_kernel_driver_active(hdl, 0)) {
if ((ret = libusb_detach_kernel_driver(hdl, 0)) < 0) {
sr_err("ezusb: failed to detach kernel driver: %d", ret);
return SR_ERR;
}
}
#endif
if ((ret = libusb_set_configuration(hdl, configuration)) < 0) {
sr_err("ezusb: Unable to set configuration: %d", ret);
return SR_ERR;
}
if ((ezusb_reset(hdl, 1)) < 0)
return SR_ERR;
if (ezusb_install_firmware(hdl, filename) < 0)
return SR_ERR;
if ((ezusb_reset(hdl, 0)) < 0)
return SR_ERR;
libusb_close(hdl);
return SR_OK;
}