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EXI_DeviceGecko.cpp
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EXI_DeviceGecko.cpp
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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "Common/StdMakeUnique.h"
#include "Core/Core.h"
#include "Core/HW/EXI_Device.h"
#include "Core/HW/EXI_DeviceGecko.h"
u16 GeckoSockServer::server_port;
int GeckoSockServer::client_count;
std::thread GeckoSockServer::connectionThread;
volatile bool GeckoSockServer::server_running;
std::mutex GeckoSockServer::connection_lock;
std::queue<std::unique_ptr<sf::TcpSocket>> GeckoSockServer::waiting_socks;
GeckoSockServer::GeckoSockServer()
: client_running(false)
{
if (!connectionThread.joinable())
connectionThread = std::thread(GeckoConnectionWaiter);
}
GeckoSockServer::~GeckoSockServer()
{
if (clientThread.joinable())
{
--client_count;
client_running = false;
clientThread.join();
}
if (client_count <= 0)
{
server_running = false;
connectionThread.join();
}
}
void GeckoSockServer::GeckoConnectionWaiter()
{
Common::SetCurrentThreadName("Gecko Connection Waiter");
sf::TcpListener server;
server_port = 0xd6ec; // "dolphin gecko"
for (int bind_tries = 0; bind_tries <= 10 && !server_running; bind_tries++)
{
server_running = server.listen(server_port) == sf::Socket::Done;
if (!server_running)
server_port++;
}
if (!server_running)
return;
Core::DisplayMessage(
StringFromFormat("USBGecko: Listening on TCP port %u", server_port),
5000);
server.setBlocking(false);
auto new_client = std::make_unique<sf::TcpSocket>();
while (server_running)
{
if (server.accept(*new_client) == sf::Socket::Done)
{
std::lock_guard<std::mutex> lk(connection_lock);
waiting_socks.push(std::move(new_client));
new_client = std::make_unique<sf::TcpSocket>();
}
SLEEP(1);
}
}
bool GeckoSockServer::GetAvailableSock()
{
bool sock_filled = false;
std::lock_guard<std::mutex> lk(connection_lock);
if (!waiting_socks.empty())
{
client = std::move(waiting_socks.front());
if (clientThread.joinable())
{
client_running = false;
clientThread.join();
recv_fifo = std::deque<u8>();
send_fifo = std::deque<u8>();
}
clientThread = std::thread(&GeckoSockServer::ClientThread, this);
client_count++;
waiting_socks.pop();
sock_filled = true;
}
return sock_filled;
}
void GeckoSockServer::ClientThread()
{
client_running = true;
Common::SetCurrentThreadName("Gecko Client");
client->setBlocking(false);
while (client_running)
{
bool did_nothing = true;
{
std::lock_guard<std::mutex> lk(transfer_lock);
// what's an ideal buffer size?
char data[128];
std::size_t got = 0;
if (client->receive(&data[0], ArraySize(data), got) == sf::Socket::Disconnected)
client_running = false;
if (got != 0)
{
did_nothing = false;
recv_fifo.insert(recv_fifo.end(), &data[0], &data[got]);
}
if (!send_fifo.empty())
{
did_nothing = false;
std::vector<char> packet(send_fifo.begin(), send_fifo.end());
send_fifo.clear();
if (client->send(&packet[0], packet.size()) == sf::Socket::Disconnected)
client_running = false;
}
} // unlock transfer
if (did_nothing)
Common::YieldCPU();
}
client->disconnect();
}
void CEXIGecko::ImmReadWrite(u32 &_uData, u32 _uSize)
{
// We don't really care about _uSize
(void)_uSize;
if (!client || client->getLocalPort() == 0)
GetAvailableSock();
switch (_uData >> 28)
{
case CMD_LED_OFF:
Core::DisplayMessage(StringFromFormat(
"USBGecko: No LEDs for you!"),
3000);
break;
case CMD_LED_ON:
Core::DisplayMessage(StringFromFormat(
"USBGecko: A piercing blue light is now shining in your general direction"),
3000);
break;
case CMD_INIT:
_uData = ident;
break;
// PC -> Gecko
// |= 0x08000000 if successful
case CMD_RECV:
{
std::lock_guard<std::mutex> lk(transfer_lock);
if (!recv_fifo.empty())
{
_uData = 0x08000000 | (recv_fifo.front() << 16);
recv_fifo.pop_front();
}
break;
}
// Gecko -> PC
// |= 0x04000000 if successful
case CMD_SEND:
{
std::lock_guard<std::mutex> lk(transfer_lock);
send_fifo.push_back(_uData >> 20);
_uData = 0x04000000;
break;
}
// Check if ok for Gecko -> PC, or FIFO full
// |= 0x04000000 if FIFO is not full
case CMD_CHK_TX:
_uData = 0x04000000;
break;
// Check if data in FIFO for PC -> Gecko, or FIFO empty
// |= 0x04000000 if data in recv FIFO
case CMD_CHK_RX:
{
std::lock_guard<std::mutex> lk(transfer_lock);
_uData = recv_fifo.empty() ? 0 : 0x04000000;
break;
}
default:
ERROR_LOG(EXPANSIONINTERFACE, "Unknown USBGecko command %x", _uData);
break;
}
}