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.
35 #include "sigrok-internal.h"
38 #define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN | \
39 LIBUSB_RECIPIENT_INTERFACE)
40 #define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT | \
41 LIBUSB_RECIPIENT_INTERFACE)
43 const int PACKET_CTRL_LEN = 2;
44 const int PACKET_INT_LEN = 2;
45 const int PACKET_BULK_LEN = 64;
46 const int INTERFACE = 0;
47 const int ENDPOINT_INT_IN = 0x81; /* Endpoint 0x81 address for IN */
48 const int ENDPOINT_INT_OUT = 0x01; /* Endpoint 1 address for OUT */
49 const int ENDPOINT_BULK_IN = 0x81; /* Endpoint 0x81 address for IN */
50 const int ENDPOINT_BULK_OUT = 0x02; /* Endpoint 1 address for OUT */
51 const int TIMEOUT = 5000; /* Timeout in ms */
60 static struct libusb_device_handle *g_devh = NULL;
62 int gl_write_address(libusb_device_handle *devh, unsigned int address)
64 unsigned char packet[8] = { address & 0xFF };
67 ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEADDR,
68 0, packet, 1, TIMEOUT);
70 sr_err("%s: libusb_control_transfer returned %d\n",
75 int gl_write_data(libusb_device_handle *devh, unsigned int val)
77 unsigned char packet[8] = { val & 0xFF };
80 ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEDATA,
81 0, packet, 1, TIMEOUT);
83 sr_err("%s: libusb_control_transfer returned %d\n",
88 int gl_read_data(libusb_device_handle *devh)
90 unsigned char packet[8] = { 0 };
93 ret = libusb_control_transfer(devh, CTRL_IN, 0xc, REQ_READDATA,
94 0, packet, 1, TIMEOUT);
96 sr_err("%s: libusb_control_transfer returned %d, val=%hhx\n",
97 __func__, ret, packet[0]);
98 return (ret == 1) ? packet[0] : ret;
101 int gl_read_bulk(libusb_device_handle *devh, void *buffer, unsigned int size)
103 unsigned char packet[8] =
104 { 0, 0, 0, 0, size & 0xff, (size & 0xff00) >> 8,
105 (size & 0xff0000) >> 16, (size & 0xff000000) >> 24 };
106 int ret, transferred = 0;
108 ret = libusb_control_transfer(devh, CTRL_OUT, 0x4, REQ_READBULK,
109 0, packet, 8, TIMEOUT);
111 sr_err("%s: libusb_control_transfer returned %d\n",
114 ret = libusb_bulk_transfer(devh, ENDPOINT_BULK_IN, buffer, size,
115 &transferred, TIMEOUT);
117 sr_err("Bulk read error %d\n", ret);
121 int gl_reg_write(libusb_device_handle *devh, unsigned int reg,
126 ret = gl_write_address(devh, reg);
129 ret = gl_write_data(devh, val);
133 int gl_reg_read(libusb_device_handle *devh, unsigned int reg)
137 ret = gl_write_address(devh, reg);
140 ret = gl_read_data(devh);