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