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Diffstat (limited to 'tools/ioemu/iodev/serial.h')
| -rw-r--r-- | tools/ioemu/iodev/serial.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/tools/ioemu/iodev/serial.h b/tools/ioemu/iodev/serial.h new file mode 100644 index 0000000000..00f01c976e --- /dev/null +++ b/tools/ioemu/iodev/serial.h @@ -0,0 +1,193 @@ +///////////////////////////////////////////////////////////////////////// +// $Id: serial.h,v 1.15 2003/11/16 08:21:10 vruppert 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_PC_CLOCK_XTL 1843200.0 + +#define BX_SER_RXIDLE 0 +#define BX_SER_RXPOLL 1 +#define BX_SER_RXWAIT 2 + +enum { + BX_SER_INT_IER, + BX_SER_INT_RXDATA, + BX_SER_INT_TXHOLD, + BX_SER_INT_RXLSTAT, + BX_SER_INT_MODSTAT, + BX_SER_INT_FIFO +}; + +typedef struct { + /* + * UART internal state + */ + bx_bool ls_interrupt; + bx_bool ms_interrupt; + bx_bool rx_interrupt; + bx_bool tx_interrupt; + bx_bool fifo_interrupt; + bx_bool ls_ipending; + bx_bool ms_ipending; + bx_bool rx_ipending; + bx_bool fifo_ipending; + + Bit8u IRQ; + + Bit8u rx_fifo_end; + Bit8u tx_fifo_end; + + int baudrate; + int tx_timer_index; + + int rx_pollstate; + int rx_timer_index; + int fifo_timer_index; + + /* + * Register definitions + */ + Bit8u rxbuffer; /* receiver buffer register (r/o) */ + Bit8u thrbuffer; /* 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 */ + } int_ident; + /* FIFO Control Register (w/o) */ + struct { + bx_bool enable; /* 1=enable tx and rx FIFOs */ + 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 thr_empty; /* 1=tx hold register (or fifo) is empty */ + bx_bool tsr_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 tsrbuffer; /* transmit shift register (internal) */ + Bit8u rx_fifo[16]; /* receive FIFO (internal) */ + Bit8u tx_fifo[16]; /* transmit FIFO (internal) */ + 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 lower_interrupt(Bit8u port); + static void raise_interrupt(Bit8u port, int type); + + static void rx_fifo_enq(Bit8u port, Bit8u data); + + 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 void fifo_timer_handler(void *); + BX_SER_SMF void fifo_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 + }; + |