135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2010 Sven Peter <sven@fail0verflow.com>
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* Copyright (C) 2010 Haxx Enterprises <bushing@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <libusb.h>
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#include "libsigrok.h"
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#include "libsigrok-internal.h"
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#include "gl_usb.h"
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#include "protocol.h"
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#define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN | \
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LIBUSB_RECIPIENT_INTERFACE)
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#define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT | \
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LIBUSB_RECIPIENT_INTERFACE)
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#define EP1_BULK_IN (LIBUSB_ENDPOINT_IN | 1)
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#define TIMEOUT 5000 /* Timeout in ms */
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enum {
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REQ_READBULK = 0x82,
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REQ_WRITEADDR,
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REQ_READDATA,
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REQ_WRITEDATA,
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};
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static int gl_write_address(libusb_device_handle *devh, unsigned int address)
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{
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unsigned char packet[8] = { address & 0xFF };
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int ret;
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ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEADDR,
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0, packet, 1, TIMEOUT);
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if (ret != 1)
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sr_err("%s: %s.", __func__, libusb_error_name(ret));
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return ret;
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}
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static int gl_write_data(libusb_device_handle *devh, unsigned int val)
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{
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unsigned char packet[8] = { val & 0xFF };
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int ret;
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ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEDATA,
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0, packet, 1, TIMEOUT);
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if (ret != 1)
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sr_err("%s: %s.", __func__, libusb_error_name(ret));
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return ret;
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}
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static int gl_read_data(libusb_device_handle *devh)
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{
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unsigned char packet[8] = { 0 };
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int ret;
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ret = libusb_control_transfer(devh, CTRL_IN, 0xc, REQ_READDATA,
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0, packet, 1, TIMEOUT);
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if (ret != 1)
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sr_err("%s: %s, val=%hhx.", __func__,
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libusb_error_name(ret), packet[0]);
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return (ret == 1) ? packet[0] : ret;
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}
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SR_PRIV int gl_read_bulk(libusb_device_handle *devh, void *buffer,
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unsigned int size)
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{
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unsigned char packet[8] =
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{ 0, 0, 0, 0, size & 0xff, (size & 0xff00) >> 8,
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(size & 0xff0000) >> 16, (size & 0xff000000) >> 24 };
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int ret, transferred = 0;
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ret = libusb_control_transfer(devh, CTRL_OUT, 0x4, REQ_READBULK,
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0, packet, 8, TIMEOUT);
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if (ret != 8)
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sr_err("%s: libusb_control_transfer: %s.", __func__,
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libusb_error_name(ret));
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ret = libusb_bulk_transfer(devh, EP1_BULK_IN, buffer, size,
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&transferred, TIMEOUT);
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if (ret < 0)
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sr_err("%s: libusb_bulk_transfer: %s.", __func__,
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libusb_error_name(ret));
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return transferred;
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}
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SR_PRIV int gl_reg_write(libusb_device_handle *devh, unsigned int reg,
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unsigned int val)
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{
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int ret;
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ret = gl_write_address(devh, reg);
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if (ret < 0)
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return ret;
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ret = gl_write_data(devh, val);
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return ret;
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}
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SR_PRIV int gl_reg_read(libusb_device_handle *devh, unsigned int reg)
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{
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int ret;
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ret = gl_write_address(devh, reg);
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if (ret < 0)
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return ret;
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ret = gl_read_data(devh);
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return ret;
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}
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