+++ /dev/null
-/*
- * 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 "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)
-
-const int PACKET_CTRL_LEN = 2;
-const int PACKET_INT_LEN = 2;
-const int PACKET_BULK_LEN = 64;
-const int INTERFACE = 0;
-const int ENDPOINT_INT_IN = 0x81; /* Endpoint 0x81 address for IN */
-const int ENDPOINT_INT_OUT = 0x01; /* Endpoint 1 address for OUT */
-const int ENDPOINT_BULK_IN = 0x81; /* Endpoint 0x81 address for IN */
-const int ENDPOINT_BULK_OUT = 0x02; /* Endpoint 1 address for OUT */
-const int TIMEOUT = 5000; /* Timeout in ms */
-
-enum {
- REQ_READBULK = 0x82,
- REQ_WRITEADDR,
- REQ_READDATA,
- REQ_WRITEDATA,
-};
-
-static struct libusb_device_handle *g_devh = NULL;
-
-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)
- printf("%s: libusb_control_transfer returned %d\n",
- __FUNCTION__, ret);
- return ret;
-}
-
-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)
- printf("%s: libusb_control_transfer returned %d\n",
- __FUNCTION__, ret);
- return ret;
-}
-
-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)
- printf("%s: libusb_control_transfer returned %d, val=%hhx\n",
- __FUNCTION__, ret, packet[0]);
- return (ret == 1) ? packet[0] : ret;
-}
-
-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)
- printf("%s: libusb_control_transfer returned %d\n",
- __FUNCTION__, ret);
-
- ret = libusb_bulk_transfer(devh, ENDPOINT_BULK_IN, buffer, size,
- &transferred, TIMEOUT);
- if (ret < 0)
- fprintf(stderr, "Bulk read error %d\n", ret);
- return transferred;
-}
-
-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;
-}
-
-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;
-}
-
-int gl_open(int vid)
-{
- int ret;
- struct libusb_device **devs;
- struct libusb_device *dev;
- size_t i = 0;
- struct libusb_device_descriptor desc;
-
- ret = libusb_init(NULL);
- if (ret < 0)
- return GL_ELIBUSB;
-
- libusb_set_debug(NULL, 0);
-
- if (libusb_get_device_list(NULL, &devs) < 0) {
- ret = GL_EOPEN;
- goto gl_open_error;
- }
-
- while ((dev = devs[i++]) != NULL) {
- if (libusb_get_device_descriptor(dev, &desc) < 0)
- break;
-
- if (desc.idVendor == vid) {
- if (libusb_open(dev, &g_devh) < 0)
- g_devh = NULL;
- break;
- }
- }
-
- libusb_free_device_list(devs, 1);
-
- if (!g_devh) {
- ret = GL_EOPEN;
- goto gl_open_error;
- }
-
- ret = libusb_set_configuration(g_devh, 1);
- if (ret < 0) {
- ret = GL_ESETCONFIG;
- goto gl_open_error;
- }
-
- ret = libusb_claim_interface(g_devh, 0);
- if (ret < 0) {
- ret = GL_ECLAIM;
- goto gl_open_error;
- }
-
- return GL_OK;
-
-gl_open_error:
- gl_close();
- return ret;
-}
-
-int gl_close(void)
-{
- if (g_devh) {
- libusb_release_interface(g_devh, 0);
- libusb_reset_device(g_devh);
- libusb_close(g_devh);
- }
- libusb_exit(NULL);
-
- return 0;
-}
projects / libsigrok.git / blobdiff