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 "libsigrok.h"
35 #include "libsigrok-internal.h"
39 #define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN | \
40 LIBUSB_RECIPIENT_INTERFACE)
41 #define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT | \
42 LIBUSB_RECIPIENT_INTERFACE)
43 #define EP1_BULK_IN (LIBUSB_ENDPOINT_IN | 1)
45 #define TIMEOUT 5000 /* Timeout in ms */
54 static int gl_write_address(libusb_device_handle *devh, unsigned int address)
56 unsigned char packet[8] = { address & 0xFF };
59 ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEADDR,
60 0, packet, 1, TIMEOUT);
62 sr_err("%s: %s.", __func__, libusb_error_name(ret));
66 static int gl_write_data(libusb_device_handle *devh, unsigned int val)
68 unsigned char packet[8] = { val & 0xFF };
71 ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEDATA,
72 0, packet, 1, TIMEOUT);
74 sr_err("%s: %s.", __func__, libusb_error_name(ret));
78 static int gl_read_data(libusb_device_handle *devh)
80 unsigned char packet[8] = { 0 };
83 ret = libusb_control_transfer(devh, CTRL_IN, 0xc, REQ_READDATA,
84 0, packet, 1, TIMEOUT);
86 sr_err("%s: %s, val=%hhx.", __func__,
87 libusb_error_name(ret), packet[0]);
88 return (ret == 1) ? packet[0] : ret;
91 SR_PRIV int gl_read_bulk(libusb_device_handle *devh, void *buffer,
94 unsigned char packet[8] =
95 { 0, 0, 0, 0, size & 0xff, (size & 0xff00) >> 8,
96 (size & 0xff0000) >> 16, (size & 0xff000000) >> 24 };
97 int ret, transferred = 0;
99 ret = libusb_control_transfer(devh, CTRL_OUT, 0x4, REQ_READBULK,
100 0, packet, 8, TIMEOUT);
102 sr_err("%s: libusb_control_transfer: %s.", __func__,
103 libusb_error_name(ret));
105 ret = libusb_bulk_transfer(devh, EP1_BULK_IN, buffer, size,
106 &transferred, TIMEOUT);
108 sr_err("%s: libusb_bulk_transfer: %s.", __func__,
109 libusb_error_name(ret));
113 SR_PRIV int gl_reg_write(libusb_device_handle *devh, unsigned int reg,
118 ret = gl_write_address(devh, reg);
121 ret = gl_write_data(devh, val);
125 SR_PRIV int gl_reg_read(libusb_device_handle *devh, unsigned int reg)
129 ret = gl_write_address(devh, reg);
132 ret = gl_read_data(devh);