83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/*
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* Copyright 2003 Digi International (www.digi.com)
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* Scott H Kilau <Scott_Kilau at digi dot com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*/
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#ifndef __DGNC_CLS_H
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#define __DGNC_CLS_H
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/************************************************************************
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* Per channel/port Classic UART structure *
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************************************************************************
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* Base Structure Entries Usage Meanings to Host *
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* *
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* W = read write R = read only *
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* U = Unused. *
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************************************************************************/
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/*
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* txrx : WR RHR/THR - Holding reg
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* ier : WR IER - Interrupt Enable Reg
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* isr_fcr : WR ISR/FCR - Interrupt Status Reg/Fifo Control Reg
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* lcr : WR LCR - Line Control Reg
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* mcr : WR MCR - Modem Control Reg
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* lsr : WR LSR - Line Status Reg
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* msr : WR MSG - Modem Status Reg
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* spr : WR SPR - Scratch pad Reg
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*/
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struct cls_uart_struct {
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u8 txrx;
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u8 ier;
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u8 isr_fcr;
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u8 lcr;
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u8 mcr;
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u8 lsr;
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u8 msr;
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u8 spr;
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};
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/* Where to read the interrupt register (8bits) */
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#define UART_CLASSIC_POLL_ADDR_OFFSET 0x40
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#define UART_EXAR654_ENHANCED_REGISTER_SET 0xBF
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#define UART_16654_FCR_TXTRIGGER_16 0x10
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#define UART_16654_FCR_RXTRIGGER_16 0x40
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#define UART_16654_FCR_RXTRIGGER_56 0x80
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/* Received CTS/RTS change of state */
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#define UART_IIR_CTSRTS 0x20
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/* Receiver data TIMEOUT */
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#define UART_IIR_RDI_TIMEOUT 0x0C
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/*
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* These are the EXTENDED definitions for the Exar 654's Interrupt
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* Enable Register.
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*/
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#define UART_EXAR654_EFR_ECB 0x10 /* Enhanced control bit */
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#define UART_EXAR654_EFR_IXON 0x2 /* Receiver compares Xon1/Xoff1 */
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#define UART_EXAR654_EFR_IXOFF 0x8 /* Transmit Xon1/Xoff1 */
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#define UART_EXAR654_EFR_RTSDTR 0x40 /* Auto RTS/DTR Flow Control Enable */
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#define UART_EXAR654_EFR_CTSDSR 0x80 /* Auto CTS/DSR Flow COntrol Enable */
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#define UART_EXAR654_IER_XOFF 0x20 /* Xoff Interrupt Enable */
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#define UART_EXAR654_IER_RTSDTR 0x40 /* Output Interrupt Enable */
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#define UART_EXAR654_IER_CTSDSR 0x80 /* Input Interrupt Enable */
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/*
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* Our Global Variables
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*/
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extern struct board_ops dgnc_cls_ops;
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#endif
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