/** * rt_com * ====== * * RT-Linux kernel module for communication across serial lines. * * Copyright (C) 1997 Jens Michaelsen * Copyright (C) 1997-2000 Jochen Kupper * Copyright (C) 1999 Hua Mao * * This program 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 2 of the * License, or (at your option) any later version. * * This program 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 this program; see the file License. if not, write to the * Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307, USA. */ #ifndef AIP_COM_P_H #define AIP_COM_P_H #define RT_COM_NAME "rt_com(aip)" //Hm, IgH /* input/ouput buffer (FIFO) sizes */ #define RT_COM_BUF_SIZ 256 // MUST BE ONLY POWER OF 2 !! /* amount of free space on input buffer for RTS reset */ #define RT_COM_BUF_LOW (RT_COM_BUF_SIZ / 3) /* amount of free space on input buffer for RTS set */ #define RT_COM_BUF_HI (RT_COM_BUF_SIZ * 2 / 3) /* limit of free space on input buffer for buffer full error */ #define RT_COM_BUF_FULL 20 /* usage flags */ #define RT_COM_PORT_FREE 0x00 #define RT_COM_PORT_INUSE 0x01 #define RT_COM_PORT_SETUP 0x02 /* Some hardware description */ #define RT_COM_BASE_BAUD 115200 /** Interrupt Service Routines * These are private functions */ static void rt_com0_isr( void ); static void rt_com1_isr( void ); /** Interrupt handling * * Define internal convinience macros for interrupt handling, so we * get rid of the system dependencies. */ //#define rt_com_irq_off( state ) do{}while(0) //rt_global_save_flags( &state ); rt_global_cli() schreiben und lesen sowieso in IRQ Hm //#define rt_com_irq_on(state) do{}while(0) //rt_global_restore_flags( state ) #define rt_com_irq_off( state ) rt_global_save_flags( &state ); rt_global_cli() #define rt_com_irq_on(state) rt_global_restore_flags( state ) #define rt_com_request_irq( irq, isr ) rt_request_global_irq( irq, isr ); rt_enable_irq( irq ); #define rt_com_free_irq( irq ) rt_free_global_irq( irq ) /* port register offsets */ #define RT_COM_RXB 0x00 #define RT_COM_TXB 0x00 #define RT_COM_IER 0x01 #define RT_COM_IIR 0x02 #define RT_COM_FCR 0x02 #define RT_COM_LCR 0x03 #define RT_COM_MCR 0x04 #define RT_COM_LSR 0x05 #define RT_COM_MSR 0x06 #define RT_COM_DLL 0x00 #define RT_COM_DLM 0x01 /** MCR Modem Control Register masks */ #define MCR_DTR 0x01 // Data Terminal Ready #define MCR_RTS 0x02 // Request To Send #define MCR_OUT1 0x04 #define MCR_OUT2 0x08 #define MCR_LOOP 0x10 #define MCR_AFE 0x20 // AutoFlow Enable /** IER Interrupt Enable Register masks */ #define IER_ERBI 0x01 // Enable Received Data Available Interrupt #define IER_ETBEI 0x02 // Enable Transmitter Holding Register // Empty Interrupt #define IER_ELSI 0x04 // Enable Receiver Line Status Interrupt #define IER_EDSSI 0x08 // Enable Modem Status Interrupt /** MSR Modem Status Register masks */ #define MSR_DELTA_CTS 0x01 #define MSR_DELTA_DSR 0x02 #define MSR_TERI 0x04 #define MSR_DELTA_DCD 0x08 #define MSR_CTS 0x10 #define MSR_DSR 0x20 #define MSR_RI 0x40 #define MSR_DCD 0x80 /** LSR Line Status Register masks */ #define LSR_DATA_READY 0x01 #define LSR_OVERRUN_ERR 0x02 #define LSR_PARITY_ERR 0x04 #define LSR_FRAMING_ERR 0x08 #define LSR_BREAK 0x10 #define LSR_THRE 0x20 // Transmitter Holding Register #define LSR_TEMT 0x40 // Transmitter Empty /** FCR FIFO Control Register masks */ #define FCR_FIFO_ENABLE 0x01 #define FCR_INPUT_FIFO_RESET 0x02 #define FCR_OUTPUT_FIFO_RESET 0x04 /** data buffer * * Used for buffering of input and output data. Two buffers per port * (one for input, one for output). Organized as a FIFO */ struct rt_buf_struct{ unsigned int head; unsigned int tail; char buf[ RT_COM_BUF_SIZ ]; }; /** Port data * * Internal information structure containing all data for a port. One * structure for every port. * * Contains all current setup parameters and all data currently * buffered by rt_com. * * mode (functioning mode) * possible values: * - RT_COM_DSR_ON_TX - for standard functioning mode (DSR needed on TX) * - RT_COM_NO_HAND_SHAKE - for comunication without hand shake signals * (only RXD-TXD-GND) * - RT_COM_HW_FLOW - for hardware flow control (RTS-CTS) * Of course RT_COM_DSR_ON_TX and RT_COM_NO_HAND_SHAKE cannot be * sppecified at the same time. * * NOTE: When you select a mode that uses hand shake signals pay * attention that no input signals (CTS,DSR,RI,DCD) must be * floating. * * used (usage flag) * possible values: * - RT_COM_PORT_INUSE - port region requested by init_module * - RT_COM_PORT_FREE - port region requested by rt_com_set_param * - RT_COM_PORT_SETUP - port parameters are setup, * don't specify at compile time ! * * error * last error detected * * ier (interrupt enable register) * copy of IER chip register, last value set by rt_com. * * mcr (modem control register) * copy of the MCR internal register */ struct rt_com_struct{ int baud_base; int port; int irq; void (*isr)(void); int baud; unsigned int wordlength; unsigned int parity; unsigned int stopbits; int mode; int fifotrig; int used; int error; int type; int ier; int mcr; struct rt_buf_struct ibuf; struct rt_buf_struct obuf; }; #endif /* RT_COM_P_H */ /** * Local Variables: * mode: C * c-file-style: "Stroustrup" * End: */