mirror of https://github.com/nirenjan/libx52.git
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
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* LibUSB stub driver for testing the Saitek X52/X52 Pro
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*
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* Copyright (C) 2017 Nirenjan Krishnan (nirenjan@nirenjan.org)
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*
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* SPDX-License-Identifier: GPL-2.0-only WITH Classpath-exception-2.0
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*/
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#include <stdio.h>
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#include <pthread.h>
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#include <libusb.h>
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struct libusb_device {
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struct libusb_context *context;
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int index;
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int ref_count;
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struct libusb_device_descriptor desc;
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};
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struct libusb_context {
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int block_size; // Set to LIBUSBX52_MEMORY_BLOCK_SIZE
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int max_devices; // Calculated based on block_size
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int debug_level;
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int num_devices;
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struct libusb_device *devices;
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// Hotplug support
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int hotplug_vid;
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int hotplug_pid;
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libusb_hotplug_event events;
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libusb_hotplug_callback_fn callback;
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void * cb_user_data;
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// Hotplug threading
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volatile int stop_thread;
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pthread_t hotplug_pthread;
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};
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struct libusb_device_handle {
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struct libusb_context *ctx;
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struct libusb_device *dev;
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int packets_written;
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FILE *packet_data_file;
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};
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/**
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* @brief Device list file environment variable
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*
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* This is used by the test driver to create a temporary environment for
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* the device list
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*/
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#define INPUT_DEVICE_LIST_ENV "LIBUSBX52_DEVICE_LIST"
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/**
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* @brief Default file location of the device list file
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*
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* This file contains a list of VIDs and PIDs in hexadecimal format separated
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* by spaces. There must be an even number of entries, each pair corresponding
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* to a (VID, PID) tuple identifying a single USB device.
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*/
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#define DEFAULT_INPUT_DEVICE_LIST_FILE "/tmp/libusbx52_device_list"
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/**
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* @brief Output data environment variable
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*
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* This is used by the test driver to create a temporary environment for
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* the output data
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*/
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#define OUTPUT_DATA_FILE_ENV "LIBUSBX52_OUTPUT_DATA"
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/**
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* @brief Default file location of the communication data file
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*
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* This file contains the libusb APIs called by libx52, after a device has
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* been opened, i.e., all APIs that operate on a libusb_device_handle
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*/
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#define DEFAULT_OUTPUT_DATA_FILE "/tmp/libusbx52_output_data"
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/**
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* @brief Device update FIFO environment variable
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*
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* This is used by the test driver to update the simulated USB device list
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*/
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#define INPUT_DEVICE_FIFO_ENV "LIBUSBX52_DEVICE_FIFO"
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/**
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* @brief Default file location of the device update FIFO
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*
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* This FIFO is read by a thread in libusbx52 and used to simulate the hotplug
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* functionality of libusb.
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*/
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#define DEFAULT_INPUT_DEVICE_FIFO_FILE "/tmp/libusbx52_device_fifo"
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libusb_device* vector_push(libusb_context *ctx, int vid, int pid);
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libusb_device* vector_pop(libusb_context *ctx, int vid, int pid);
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