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ezusb.c
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1 /*
2  * This file is part of the sigrok project.
3  *
4  * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5  *
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.
10  *
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.
15  *
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/>.
18  */
19 
20 /*
21  * Helper functions for the Cypress EZ-USB / FX2 series chips.
22  */
23 
24 #include <libusb.h>
25 #include <glib.h>
26 #include <glib/gstdio.h>
27 #include <stdio.h>
28 #include <errno.h>
29 #include <string.h>
30 #include "sigrok.h"
31 #include "sigrok-internal.h"
32 
33 SR_PRIV int ezusb_reset(struct libusb_device_handle *hdl, int set_clear)
34 {
35  int ret;
36  unsigned char buf[1];
37 
38  sr_info("ezusb: setting CPU reset mode %s...",
39  set_clear ? "on" : "off");
40  buf[0] = set_clear ? 1 : 0;
41  ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR, 0xa0,
42  0xe600, 0x0000, buf, 1, 100);
43  if (ret < 0)
44  sr_err("ezusb: Unable to send control request: %d", ret);
45 
46  return ret;
47 }
48 
49 SR_PRIV int ezusb_install_firmware(libusb_device_handle *hdl,
50  const char *filename)
51 {
52  FILE *fw;
53  int offset, chunksize, ret, result;
54  unsigned char buf[4096];
55 
56  sr_info("ezusb: Uploading firmware at %s", filename);
57  if ((fw = g_fopen(filename, "rb")) == NULL) {
58  sr_err("ezusb: Unable to open firmware file %s for reading: %s",
59  filename, strerror(errno));
60  return SR_ERR;
61  }
62 
63  result = SR_OK;
64  offset = 0;
65  while (1) {
66  chunksize = fread(buf, 1, 4096, fw);
67  if (chunksize == 0)
68  break;
69  ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR |
70  LIBUSB_ENDPOINT_OUT, 0xa0, offset,
71  0x0000, buf, chunksize, 100);
72  if (ret < 0) {
73  sr_err("ezusb: Unable to send firmware to device: %d",
74  ret);
75  result = SR_ERR;
76  break;
77  }
78  sr_info("ezusb: Uploaded %d bytes", chunksize);
79  offset += chunksize;
80  }
81  fclose(fw);
82  sr_info("ezusb: Firmware upload done");
83 
84  return result;
85 }
86 
87 SR_PRIV int ezusb_upload_firmware(libusb_device *dev, int configuration,
88  const char *filename)
89 {
90  struct libusb_device_handle *hdl;
91  int ret;
92 
93  sr_info("ezusb: uploading firmware to device on %d.%d",
94  libusb_get_bus_number(dev), libusb_get_device_address(dev));
95 
96  if ((ret = libusb_open(dev, &hdl)) < 0) {
97  sr_err("ezusb: failed to open device: %d", ret);
98  return SR_ERR;
99  }
100 
101 /* Neither Windows/MinGW nor Darwin/Mac support these libusb-1.0 calls. */
102 #if !defined(_WIN32) && !defined(__APPLE__)
103  if (libusb_kernel_driver_active(hdl, 0)) {
104  if ((ret = libusb_detach_kernel_driver(hdl, 0)) < 0) {
105  sr_err("ezusb: failed to detach kernel driver: %d", ret);
106  return SR_ERR;
107  }
108  }
109 #endif
110 
111  if ((ret = libusb_set_configuration(hdl, configuration)) < 0) {
112  sr_err("ezusb: Unable to set configuration: %d", ret);
113  return SR_ERR;
114  }
115 
116  if ((ezusb_reset(hdl, 1)) < 0)
117  return SR_ERR;
118 
119  if (ezusb_install_firmware(hdl, filename) < 0)
120  return SR_ERR;
121 
122  if ((ezusb_reset(hdl, 0)) < 0)
123  return SR_ERR;
124 
125  libusb_close(hdl);
126 
127  return SR_OK;
128 }