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Length: 3997 (0xf9d)
Types: TextFile
Notes: UNIX file
Names: »i8251.h«
└─⟦a6ab2eb36⟧ Bits:30004042/kconfig3.imd SW95705I 386/ix Multi-user Release 1.2
└─⟦a6ab2eb36⟧ UNIX Filesystem
└─⟦this⟧ »kc/new/usr/include/sys/i8251.h«
/* Copyright (c) 1987 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
/*
* INTEL CORPORATION PROPRIETARY INFORMATION
*
* This software is supplied under the terms of a license
* agreement or nondisclosure agreement with Intel Corpo-
* ration and may not be copied or disclosed except in
* accordance with the terms of that agreement.
*/
#ident "@(#)i8251.h 1.8 - 87/09/29"
#define ISPEED 13 /* initial baud rate of 9600==(13);300==(7)*/
#define MINORMSK 0x1F /* reserve bit 7 ; bit 6 for modem */
#define MODEMMSK 0x40 /* bit 6 of the minor number sets modem op */
/*
* Structures for the 8251 USART
* ____________________________
*
* Commands used for operation and initialization of
* USART and PIT
* ____________________________
*
* Refer to Intel Microsystem Components Handbook for further information
* on the 8251 USART and 8254 Programmable Interval Timer
*
* Device PHYSICAL port layout
* Based on Data Block Select
*
*
* Usart I/O functions:
*
* Write: I/O
* Read: I/O
*
*/
struct i8251cfg{
short u_data;
short u_cntrl;
short t_data;
short t_cntrl;
short in_intr;
short out_intr;
char t_number;
char b_type;
};
/*
* Type bits used to determine what the 8251 is mounted on.
*/
#define N8251TYPES 2
#define T_GENERIC 0
#define T_ONBOARD 1
#define T_iSBC351 2
/*
*
* 8253/8254 PIT commands
*
* RATEMD0: read/load timer 0 for mode 3 (baud rate generator)
*
* U8251SPEED: int constant of 1600 pit count in hex.
*
*/
#define RATEMD0 0x36
#define U8251SPEED 0x0640
/*
* 8251 USART command instructions
* I001 split instructions into separate bits
*/
#define S_TXEN 0x01 /* transmitter enable */
#define S_DTR 0x02 /* data terminal ready */
#define S_RXEN 0x04 /* receiver enable */
#define S_SBRK 0x08 /* send break char */
#define S_ER 0x10 /* error reset */
#define S_RTS 0x20 /* request to send */
#define S_IR 0x40 /* internal reset */
#define S_TXRDY 0x01 /* transmitter ready for character */
#define S_RXRDY 0x02 /* receiver has data */
#define S_TXEMPTY 0x04 /* transmit buffer empty */
#define S_PERROR 0x08 /* parity error */
#define S_OVERRUN 0x10 /* overrun */
#define S_FRERROR 0x20 /* framing error */
#define S_BRKDET 0x40 /* input break detect */
#define S_DSRDY 0x80 /* carrier present */
#define S_ERRCOND (S_PERROR|S_OVERRUN|S_FRERROR)
/*
* 8251 USART mode instructions
* I001 split instructions into separate bits
*/
#define S_BAUDF 0x02 /* baud rate factor = 16x */
#define S_5BPC 0x00 /* 5 bits per char */
#define S_6BPC 0x04 /* 6 bits per char */
#define S_7BPC 0x08 /* 7 bits per char */
#define S_8BPC 0x0C /* 8 bits per char */
#define S_PAREN 0x10 /* parity enable */
#define S_PAREVEN 0x20 /* even parity */
#define S_1STOP 0x40 /* 1 stop bit */
#define S_2STOP 0xC0 /* 2 stop bits */
/*
* the following used to be in a file called usart.h.
* since the 351 is the only driver that uses this stuff, it's
* been moved into this include file.
*/
/*
* Baud rate selection. These go into the clock counter.
*/
#define US_B38400 2
#define US_B19200 4
#define US_B9600 8
#define US_B4800 16
#define US_B2400 32
#define US_B1800 48
#define US_B1200 64
#define US_B600 128
#define US_B300 256
#define US_B200 384
#define US_B150 512
#define US_B110 698
#define US_B75 1024
#define US_B50 1536
#define US_B0 0
#ifdef VPIX
#define AIOC ('A'<<8)
#define AIOCINTTYPE (AIOC|60) /* set pseudorupt personality */
#define AIOCDOSMODE (AIOC|61) /* set DOSMODE */
#define AIOCNONDOSMODE (AIOC|62) /* reset DOSMODE */
#define AIOCSETSS (AIOC|65) /* set start/stop chars */
#define AIOCINFO (AIOC|66) /* tell user what device we are */
#endif /* VPIX */