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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2013 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 "libsigrok.h"
#include "libsigrok-internal.h"
/* Message logging helpers with subsystem-specific prefix string. */
#define LOG_PREFIX "ezusb: "
#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
SR_PRIV int ezusb_reset(struct libusb_device_handle *hdl, int set_clear)
{
int ret;
unsigned char buf[1];
sr_info("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("Unable to send control request: %s.",
libusb_error_name(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("Uploading firmware at %s", filename);
if ((fw = g_fopen(filename, "rb")) == NULL) {
sr_err("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("Unable to send firmware to device: %s.",
libusb_error_name(ret));
result = SR_ERR;
break;
}
sr_info("Uploaded %d bytes", chunksize);
offset += chunksize;
}
fclose(fw);
sr_info("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("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("failed to open device: %s.", libusb_error_name(ret));
return SR_ERR;
}
/*
* The libusbx darwin backend is broken: it can report a kernel driver being
* active, but detaching it always returns an error.
*/
#if !defined(__APPLE__)
if (libusb_kernel_driver_active(hdl, 0) == 1) {
if ((ret = libusb_detach_kernel_driver(hdl, 0)) < 0) {
sr_err("failed to detach kernel driver: %s",
libusb_error_name(ret));
return SR_ERR;
}
}
#endif
if ((ret = libusb_set_configuration(hdl, configuration)) < 0) {
sr_err("Unable to set configuration: %s",
libusb_error_name(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;
}
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