Merge remote-tracking branch 'Kernel/master'

Kernel/tty/teletype.cpp

@@ -0,0 +1,141 @@
+/*
+	This file is part of Fennix Kernel.
+
+	Fennix Kernel is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix Kernel is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <tty.hpp>
+
+#include <memory.hpp>
+#include <stropts.h>
+#include <string.h>
+#include <uart.hpp>
+
+#include "../kernel.h"
+
+namespace TTY
+{
+	ssize_t TerminalBuffer::Read(char *OutputBuffer, size_t Size)
+	{
+		std::lock_guard<std::mutex> lock(Mutex);
+		size_t bytesRead = 0;
+
+		while (bytesRead < Size && ReadIndex != WriteIndex)
+		{
+			OutputBuffer[bytesRead++] = Buffer[ReadIndex];
+			ReadIndex = (ReadIndex + 1) % Buffer.size();
+		}
+
+		return bytesRead;
+	}
+
+	ssize_t TerminalBuffer::Write(const char *InputBuffer, size_t Size)
+	{
+		std::lock_guard<std::mutex> lock(Mutex);
+		size_t bytesWritten = 0;
+
+		for (size_t i = 0; i < Size; ++i)
+		{
+			Buffer[WriteIndex] = InputBuffer[i];
+			WriteIndex = (WriteIndex + 1) % Buffer.size();
+			bytesWritten++;
+		}
+
+		return bytesWritten;
+	}
+
+	/* ======================================================================== */
+
+	int TeletypeDriver::Open(int Flags, mode_t Mode)
+	{
+		warn("Unimplemented open(%#x, %#x)", Flags, Mode);
+		return -ENOSYS;
+	}
+
+	int TeletypeDriver::Close()
+	{
+		warn("Unimplemented close()");
+		return -ENOSYS;
+	}
+
+	ssize_t TeletypeDriver::Read(void *Buffer, size_t Size, off_t Offset)
+	{
+		warn("Unimplemented read(%#lx, %#lx, %#lx)", Buffer, Size, Offset);
+		return -ENOSYS;
+	}
+
+	ssize_t TeletypeDriver::Write(const void *Buffer, size_t Size, off_t Offset)
+	{
+		warn("Unimplemented write(%#lx, %#lx, %#lx)", Buffer, Size, Offset);
+		return -ENOSYS;
+	}
+
+	int TeletypeDriver::Ioctl(unsigned long Request, void *Argp)
+	{
+		warn("Unimplemented ioctl(%#lx, %#lx)", Request, Argp);
+		return -ENOSYS;
+	}
+
+	TeletypeDriver::TeletypeDriver()
+		: TermBuf(1024)
+	{
+		this->TerminalSize = {
+			.ws_row = 0,
+			.ws_col = 0,
+			.ws_xpixel = 0,
+			.ws_ypixel = 0,
+		};
+
+		/*
+		- ICRNL  - Map Carriage Return to New Line
+		- IXON   - Enable XON/XOFF flow control
+
+		- OPOST  - Enable output processing
+		- ONLCR  - Map New Line to Carriage Return - New Line
+
+		- CS8    - 8-bit characters
+		- CREAD  - Enable receiver
+		- HUPCL  - Hang up on last close
+
+		- ECHO   - Echo input characters
+		- ICANON - Enable canonical input (enable line editing)
+		*/
+		this->TerminalConfig.c_iflag = /*ICRNL |*/ IXON;
+		this->TerminalConfig.c_oflag = OPOST | ONLCR;
+		this->TerminalConfig.c_cflag = CS8 | CREAD | HUPCL;
+		this->TerminalConfig.c_lflag = ECHO | ICANON;
+
+		this->TerminalConfig.c_cc[VINTR] = 0x03;	/* ^C */
+		this->TerminalConfig.c_cc[VQUIT] = 0x1C;	/* ^\ */
+		this->TerminalConfig.c_cc[VERASE] = 0x7F;	/* DEL */
+		this->TerminalConfig.c_cc[VKILL] = 0x15;	/* ^U */
+		this->TerminalConfig.c_cc[VEOF] = 0x04;		/* ^D */
+		this->TerminalConfig.c_cc[VTIME] = 0;		/* Timeout for non-canonical read */
+		this->TerminalConfig.c_cc[VMIN] = 1;		/* Minimum number of characters for non-canonical read */
+		this->TerminalConfig.c_cc[VSWTC] = 0;		/* ^O */
+		this->TerminalConfig.c_cc[VSTART] = 0x11;	/* ^Q */
+		this->TerminalConfig.c_cc[VSTOP] = 0x13;	/* ^S */
+		this->TerminalConfig.c_cc[VSUSP] = 0x1A;	/* ^Z */
+		this->TerminalConfig.c_cc[VEOL] = 0x00;		/* NUL */
+		this->TerminalConfig.c_cc[VREPRINT] = 0x12; /* ^R */
+		this->TerminalConfig.c_cc[VDISCARD] = 0x14; /* ^T */
+		this->TerminalConfig.c_cc[VWERASE] = 0x17;	/* ^W */
+		this->TerminalConfig.c_cc[VLNEXT] = 0x19;	/* ^Y */
+		this->TerminalConfig.c_cc[VEOL2] = 0x7F;	/* DEL (or sometimes EOF) */
+	}
+
+	TeletypeDriver::~TeletypeDriver()
+	{
+	}
+}