248 lines
7.4 KiB
C++
248 lines
7.4 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id: serial.h,v 1.28 2006-03-07 21:11:19 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2004 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef BX_IODEV_SERIAL_H
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#define BX_IODEV_SERIAL_H
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// Peter Grehan (grehan@iprg.nokia.com) coded most of this
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// serial emulation.
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#if BX_USE_SER_SMF
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# define BX_SER_SMF static
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# define BX_SER_THIS theSerialDevice->
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#else
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# define BX_SER_SMF
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# define BX_SER_THIS this->
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#endif
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#if defined(WIN32)
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#define SERIAL_ENABLE
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#endif
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#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__) || defined(__APPLE__)
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#define SERIAL_ENABLE
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extern "C" {
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#include <termios.h>
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};
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#endif
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#define BX_SERIAL_MAXDEV 4
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#define BX_PC_CLOCK_XTL 1843200.0
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#define BX_SER_RXIDLE 0
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#define BX_SER_RXPOLL 1
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#define BX_SER_RXWAIT 2
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#define BX_SER_THR 0
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#define BX_SER_RBR 0
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#define BX_SER_IER 1
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#define BX_SER_IIR 2
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#define BX_SER_FCR 2
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#define BX_SER_LCR 3
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#define BX_SER_MCR 4
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#define BX_SER_LSR 5
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#define BX_SER_MSR 6
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#define BX_SER_SCR 7
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#define BX_SER_MODE_NULL 0
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#define BX_SER_MODE_FILE 1
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#define BX_SER_MODE_TERM 2
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#define BX_SER_MODE_RAW 3
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#define BX_SER_MODE_MOUSE 4
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#define BX_SER_MODE_SOCKET 5
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enum {
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BX_SER_INT_IER,
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BX_SER_INT_RXDATA,
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BX_SER_INT_TXHOLD,
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BX_SER_INT_RXLSTAT,
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BX_SER_INT_MODSTAT,
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BX_SER_INT_FIFO
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};
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#if USE_RAW_SERIAL
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class serial_raw;
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#endif
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typedef struct {
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/*
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* UART internal state
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*/
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bx_bool ls_interrupt;
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bx_bool ms_interrupt;
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bx_bool rx_interrupt;
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bx_bool tx_interrupt;
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bx_bool fifo_interrupt;
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bx_bool ls_ipending;
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bx_bool ms_ipending;
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bx_bool rx_ipending;
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bx_bool fifo_ipending;
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Bit8u IRQ;
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Bit8u rx_fifo_end;
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Bit8u tx_fifo_end;
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int baudrate;
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int tx_timer_index;
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int rx_pollstate;
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int rx_timer_index;
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int fifo_timer_index;
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int io_mode;
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int tty_id;
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int socket_id;
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FILE *output;
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#if USE_RAW_SERIAL
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serial_raw* raw;
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#endif
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#if defined(SERIAL_ENABLE) && !defined(WIN32)
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struct termios term_orig, term_new;
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#endif
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/*
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* Register definitions
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*/
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Bit8u rxbuffer; /* receiver buffer register (r/o) */
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Bit8u thrbuffer; /* transmit holding register (w/o) */
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/* Interrupt Enable Register */
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struct {
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bx_bool rxdata_enable; /* 1=enable receive data interrupts */
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bx_bool txhold_enable; /* 1=enable tx. holding reg. empty ints */
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bx_bool rxlstat_enable; /* 1=enable rx line status interrupts */
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bx_bool modstat_enable; /* 1=enable modem status interrupts */
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} int_enable;
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/* Interrupt Identification Register (r/o) */
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struct {
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bx_bool ipending; /* 0=interrupt pending */
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Bit8u int_ID; /* 3-bit interrupt ID */
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} int_ident;
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/* FIFO Control Register (w/o) */
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struct {
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bx_bool enable; /* 1=enable tx and rx FIFOs */
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Bit8u rxtrigger; /* 2-bit code for rx fifo trigger level */
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} fifo_cntl;
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/* Line Control Register (r/w) */
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struct {
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Bit8u wordlen_sel; /* 2-bit code for char length */
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bx_bool stopbits; /* select stop bit len */
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bx_bool parity_enable; /* ... */
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bx_bool evenparity_sel; /* ... */
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bx_bool stick_parity; /* ... */
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bx_bool break_cntl; /* 1=send break signal */
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bx_bool dlab; /* divisor latch access bit */
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} line_cntl;
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/* MODEM Control Register (r/w) */
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struct {
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bx_bool dtr; /* DTR output value */
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bx_bool rts; /* RTS output value */
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bx_bool out1; /* OUTPUT1 value */
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bx_bool out2; /* OUTPUT2 value */
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bx_bool local_loopback; /* 1=loopback mode */
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} modem_cntl;
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/* Line Status Register (r/w) */
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struct {
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bx_bool rxdata_ready; /* 1=receiver data ready */
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bx_bool overrun_error; /* 1=receive overrun detected */
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bx_bool parity_error; /* 1=rx char has a bad parity bit */
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bx_bool framing_error; /* 1=no stop bit detected for rx char */
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bx_bool break_int; /* 1=break signal detected */
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bx_bool thr_empty; /* 1=tx hold register (or fifo) is empty */
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bx_bool tsr_empty; /* 1=shift reg and hold reg empty */
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bx_bool fifo_error; /* 1=at least 1 err condition in fifo */
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} line_status;
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/* Modem Status Register (r/w) */
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struct {
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bx_bool delta_cts; /* 1=CTS changed since last read */
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bx_bool delta_dsr; /* 1=DSR changed since last read */
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bx_bool ri_trailedge; /* 1=RI moved from low->high */
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bx_bool delta_dcd; /* 1=CD changed since last read */
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bx_bool cts; /* CTS input value */
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bx_bool dsr; /* DSR input value */
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bx_bool ri; /* RI input value */
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bx_bool dcd; /* DCD input value */
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} modem_status;
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Bit8u scratch; /* Scratch Register (r/w) */
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Bit8u tsrbuffer; /* transmit shift register (internal) */
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Bit8u rx_fifo[16]; /* receive FIFO (internal) */
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Bit8u tx_fifo[16]; /* transmit FIFO (internal) */
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Bit8u divisor_lsb; /* Divisor latch, least-sig. byte */
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Bit8u divisor_msb; /* Divisor latch, most-sig. byte */
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} bx_serial_t;
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class bx_serial_c : public bx_serial_stub_c {
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public:
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bx_serial_c();
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virtual ~bx_serial_c();
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virtual void init(void);
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virtual void reset(unsigned type);
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virtual void serial_mouse_enq(int delta_x, int delta_y, int delta_z, unsigned button_state);
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private:
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bx_serial_t s[BX_SERIAL_MAXDEV];
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int detect_mouse;
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int mouse_port;
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int mouse_delayed_dx;
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int mouse_delayed_dy;
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int mouse_delayed_dz;
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struct {
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int num_elements;
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Bit8u buffer[BX_MOUSE_BUFF_SIZE];
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int head;
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} mouse_internal_buffer;
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static void lower_interrupt(Bit8u port);
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static void raise_interrupt(Bit8u port, int type);
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static void rx_fifo_enq(Bit8u port, Bit8u data);
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static void tx_timer_handler(void *);
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BX_SER_SMF void tx_timer(void);
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static void rx_timer_handler(void *);
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BX_SER_SMF void rx_timer(void);
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static void fifo_timer_handler(void *);
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BX_SER_SMF void fifo_timer(void);
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static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
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static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
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#if !BX_USE_SER_SMF
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Bit32u read(Bit32u address, unsigned io_len);
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void write(Bit32u address, Bit32u value, unsigned io_len);
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#endif
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};
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#endif
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