Reorganize project tree.

[libsigrok.git] / src / ezusb.c

diff --git a/src/ezusb.c b/src/ezusb.c
new file mode 100644 (file)
index 0000000..044b464
--- /dev/null
+++ b/src/ezusb.c
@@ -0,0 +1,136 @@
+/*
+ * This file is part of the libsigrok 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 "libsigrok.h"
+#include "libsigrok-internal.h"
+
+#define LOG_PREFIX "ezusb"
+
+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;
+}