2 * This file is part of the sigrok project.
4 * Copyright (C) 2010 Sven Peter <sven@fail0verflow.com>
5 * Copyright (C) 2010 Haxx Enterprises <bushing@gmail.com>
8 * Redistribution and use in source and binary forms, with or
9 * without modification, are permitted provided that the following
12 * * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
15 * * Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
29 * THE POSSIBILITY OF SUCH DAMAGE.
34 #include <sigrok-internal.h>
37 #define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN | \
38 LIBUSB_RECIPIENT_INTERFACE)
39 #define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT | \
40 LIBUSB_RECIPIENT_INTERFACE)
42 const int PACKET_CTRL_LEN = 2;
43 const int PACKET_INT_LEN = 2;
44 const int PACKET_BULK_LEN = 64;
45 const int INTERFACE = 0;
46 const int ENDPOINT_INT_IN = 0x81; /* Endpoint 0x81 address for IN */
47 const int ENDPOINT_INT_OUT = 0x01; /* Endpoint 1 address for OUT */
48 const int ENDPOINT_BULK_IN = 0x81; /* Endpoint 0x81 address for IN */
49 const int ENDPOINT_BULK_OUT = 0x02; /* Endpoint 1 address for OUT */
50 const int TIMEOUT = 5000; /* Timeout in ms */
59 static struct libusb_device_handle *g_devh = NULL;
61 int gl_write_address(libusb_device_handle *devh, unsigned int address)
63 unsigned char packet[8] = { address & 0xFF };
66 ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEADDR,
67 0, packet, 1, TIMEOUT);
69 sr_err("%s: libusb_control_transfer returned %d\n",
74 int gl_write_data(libusb_device_handle *devh, unsigned int val)
76 unsigned char packet[8] = { val & 0xFF };
79 ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEDATA,
80 0, packet, 1, TIMEOUT);
82 sr_err("%s: libusb_control_transfer returned %d\n",
87 int gl_read_data(libusb_device_handle *devh)
89 unsigned char packet[8] = { 0 };
92 ret = libusb_control_transfer(devh, CTRL_IN, 0xc, REQ_READDATA,
93 0, packet, 1, TIMEOUT);
95 sr_err("%s: libusb_control_transfer returned %d, val=%hhx\n",
96 __func__, ret, packet[0]);
97 return (ret == 1) ? packet[0] : ret;
100 int gl_read_bulk(libusb_device_handle *devh, void *buffer, unsigned int size)
102 unsigned char packet[8] =
103 { 0, 0, 0, 0, size & 0xff, (size & 0xff00) >> 8,
104 (size & 0xff0000) >> 16, (size & 0xff000000) >> 24 };
105 int ret, transferred = 0;
107 ret = libusb_control_transfer(devh, CTRL_OUT, 0x4, REQ_READBULK,
108 0, packet, 8, TIMEOUT);
110 sr_err("%s: libusb_control_transfer returned %d\n",
113 ret = libusb_bulk_transfer(devh, ENDPOINT_BULK_IN, buffer, size,
114 &transferred, TIMEOUT);
116 sr_err("Bulk read error %d\n", ret);
120 int gl_reg_write(libusb_device_handle *devh, unsigned int reg,
125 ret = gl_write_address(devh, reg);
128 ret = gl_write_data(devh, val);
132 int gl_reg_read(libusb_device_handle *devh, unsigned int reg)
136 ret = gl_write_address(devh, reg);
139 ret = gl_read_data(devh);
146 struct libusb_device **devs;
147 struct libusb_device *dev;
149 struct libusb_device_descriptor desc;
151 ret = libusb_init(NULL);
155 if (libusb_get_device_list(NULL, &devs) < 0) {
160 while ((dev = devs[i++]) != NULL) {
161 if (libusb_get_device_descriptor(dev, &desc) < 0)
164 if (desc.idVendor == vid) {
165 if (libusb_open(dev, &g_devh) < 0)
171 libusb_free_device_list(devs, 1);
178 ret = libusb_set_configuration(g_devh, 1);
184 ret = libusb_claim_interface(g_devh, 0);
200 libusb_release_interface(g_devh, 0);
201 libusb_reset_device(g_devh);
202 libusb_close(g_devh);