///////////////////////////////////////////////////////////////////////// // $Id: serial.h,v 1.9 2002-10-25 11:44:41 bdenney Exp $ ///////////////////////////////////////////////////////////////////////// // // Copyright (C) 2002 MandrakeSoft S.A. // // MandrakeSoft S.A. // 43, rue d'Aboukir // 75002 Paris - France // http://www.linux-mandrake.com/ // http://www.mandrakesoft.com/ // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library 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 // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA // Peter Grehan (grehan@iprg.nokia.com) coded most of this // serial emulation. #if USE_RAW_SERIAL #include "serial_raw.h" #endif // USE_RAW_SERIAL #if BX_USE_SER_SMF # define BX_SER_SMF static # define BX_SER_THIS theSerialDevice-> #else # define BX_SER_SMF # define BX_SER_THIS this-> #endif #define BX_SERIAL_MAXDEV 4 #define BX_SERIAL_CONFDEV 1 /* only 1 serial port currently */ #define BX_PC_CLOCK_XTL 1843200.0 #define BX_SER_RXIDLE 0 #define BX_SER_RXPOLL 1 #define BX_SER_RXWAIT 2 typedef struct { /* * UART internal state */ bx_bool rx_empty; bx_bool tx_empty; bx_bool ls_interrupt; bx_bool ms_interrupt; bx_bool rx_interrupt; bx_bool tx_interrupt; bx_bool ls_ipending; bx_bool ms_ipending; bx_bool rx_ipending; bx_bool tx_ipending; int baudrate; int tx_timer_index; int rx_pollstate; int rx_timer_index; #define RX_CB_SIZE 80 int rx_cb_start; int rx_cb_end; unsigned char rx_cbuf[RX_CB_SIZE]; /* * Register definitions */ Bit8u rxbuffer; /* receiver buffer register (r/o) */ Bit8u txbuffer; /* transmit holding register (w/o) */ /* Interrupt Enable Register */ struct { bx_bool rxdata_enable; /* 1=enable receive data interrupts */ bx_bool txhold_enable; /* 1=enable tx. holding reg. empty ints */ bx_bool rxlstat_enable; /* 1=enable rx line status interrupts */ bx_bool modstat_enable; /* 1=enable modem status interrupts */ } int_enable; /* Interrupt Identification Register (r/o) */ struct { bx_bool ipending; /* 0=interrupt pending */ Bit8u int_ID; /* 3-bit interrupt ID */ Bit8u fifo_enabled; /* 2-bit, set to b11 when FCR0 enabled */ } int_ident; /* FIFO Control Register (w/o) */ struct { bx_bool enable; /* 1=enable tx and rx FIFOs */ bx_bool rxreset; /* 1=clear rx fifo. self-clearing */ bx_bool txreset; /* 1=clear tx fifo. self-clearing */ bx_bool dmamode; /* 1=DMA mode 1 (unused on PC ?) */ Bit8u rxtrigger; /* 2-bit code for rx fifo trigger level */ } fifo_cntl; /* Line Control Register (r/w) */ struct { Bit8u wordlen_sel; /* 2-bit code for char length */ bx_bool stopbits; /* select stop bit len */ bx_bool parity_enable; /* ... */ bx_bool evenparity_sel; /* ... */ bx_bool stick_parity; /* ... */ bx_bool break_cntl; /* 1=send break signal */ bx_bool dlab; /* divisor latch access bit */ } line_cntl; /* MODEM Control Register (r/w) */ struct { bx_bool dtr; /* DTR output value */ bx_bool rts; /* RTS output value */ bx_bool out1; /* OUTPUT1 value */ bx_bool out2; /* OUTPUT2 value */ bx_bool local_loopback; /* 1=loopback mode */ } modem_cntl; /* Line Status Register (r/w) */ struct { bx_bool rxdata_ready; /* 1=receiver data ready */ bx_bool overrun_error; /* 1=receive overrun detected */ bx_bool parity_error; /* 1=rx char has a bad parity bit */ bx_bool framing_error; /* 1=no stop bit detected for rx char */ bx_bool break_int; /* 1=break signal detected */ bx_bool txhold_empty; /* 1=tx hold register (or fifo) is empty */ bx_bool txtransm_empty; /* 1=shift reg and hold reg empty */ bx_bool fifo_error; /* 1=at least 1 err condition in fifo */ } line_status; /* Modem Status Register (r/w) */ struct { bx_bool delta_cts; /* 1=CTS changed since last read */ bx_bool delta_dsr; /* 1=DSR changed since last read */ bx_bool ri_trailedge; /* 1=RI moved from low->high */ bx_bool delta_dcd; /* 1=CD changed since last read */ bx_bool cts; /* CTS input value */ bx_bool dsr; /* DSR input value */ bx_bool ri; /* RI input value */ bx_bool dcd; /* DCD input value */ } modem_status; Bit8u scratch; /* Scratch Register (r/w) */ Bit8u divisor_lsb; /* Divisor latch, least-sig. byte */ Bit8u divisor_msb; /* Divisor latch, most-sig. byte */ } bx_serial_t; class bx_serial_c : public bx_devmodel_c { public: bx_serial_c(void); ~bx_serial_c(void); virtual void init(void); virtual void reset(unsigned type); #if USE_RAW_SERIAL serial_raw* raw; #endif // USE_RAW_SERIAL private: bx_serial_t s[BX_SERIAL_MAXDEV]; static void tx_timer_handler(void *); BX_SER_SMF void tx_timer(void); static void rx_timer_handler(void *); BX_SER_SMF void rx_timer(void); static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len); static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len); #if !BX_USE_SER_SMF Bit32u read(Bit32u address, unsigned io_len); void write(Bit32u address, Bit32u value, unsigned io_len); #endif };