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thorpej
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sys/dev/isa/com.c
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sys/dev/isa/com.c
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/* $NetBSD: comreg.h,v 1.10 1997/10/15 21:13:36 thorpej Exp $ */
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/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)comreg.h 7.2 (Berkeley) 5/9/91
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*/
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#include <dev/ic/ns16550reg.h>
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#define COM_FREQ 1843200 /* 16-bit baud rate divisor */
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#define COM_TOLERANCE 30 /* baud rate tolerance, in 0.1% units */
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/* interrupt enable register */
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#define IER_ERXRDY 0x1 /* Enable receiver interrupt */
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#define IER_ETXRDY 0x2 /* Enable transmitter empty interrupt */
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#define IER_ERLS 0x4 /* Enable line status interrupt */
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#define IER_EMSC 0x8 /* Enable modem status interrupt */
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/* interrupt identification register */
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#define IIR_IMASK 0xf
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#define IIR_RXTOUT 0xc
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#define IIR_RLS 0x6 /* Line status change */
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#define IIR_RXRDY 0x4 /* Receiver ready */
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#define IIR_TXRDY 0x2 /* Transmitter ready */
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#define IIR_MLSC 0x0 /* Modem status */
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#define IIR_NOPEND 0x1 /* No pending interrupts */
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#define IIR_FIFO_MASK 0xc0 /* set if FIFOs are enabled */
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/* fifo control register */
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#define FIFO_ENABLE 0x01 /* Turn the FIFO on */
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#define FIFO_RCV_RST 0x02 /* Reset RX FIFO */
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#define FIFO_XMT_RST 0x04 /* Reset TX FIFO */
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#define FIFO_DMA_MODE 0x08
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#define FIFO_TRIGGER_1 0x00 /* Trigger RXRDY intr on 1 character */
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#define FIFO_TRIGGER_4 0x40 /* ibid 4 */
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#define FIFO_TRIGGER_8 0x80 /* ibid 8 */
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#define FIFO_TRIGGER_14 0xc0 /* ibid 14 */
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/* line control register */
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#define LCR_DLAB 0x80 /* Divisor latch access enable */
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#define LCR_SBREAK 0x40 /* Break Control */
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#define LCR_PZERO 0x38 /* Space parity */
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#define LCR_PONE 0x28 /* Mark parity */
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#define LCR_PEVEN 0x18 /* Even parity */
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#define LCR_PODD 0x08 /* Odd parity */
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#define LCR_PNONE 0x00 /* No parity */
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#define LCR_PENAB 0x08 /* XXX - low order bit of all parity */
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#define LCR_STOPB 0x04 /* 2 stop bits per serial word */
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#define LCR_8BITS 0x03 /* 8 bits per serial word */
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#define LCR_7BITS 0x02 /* 7 bits */
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#define LCR_6BITS 0x01 /* 6 bits */
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#define LCR_5BITS 0x00 /* 5 bits */
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/* modem control register */
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#define MCR_LOOPBACK 0x10 /* Loop test: echos from TX to RX */
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#define MCR_IENABLE 0x08 /* Out2: enables UART interrupts */
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#define MCR_DRS 0x04 /* Out1: resets some internal modems */
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#define MCR_RTS 0x02 /* Request To Send */
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#define MCR_DTR 0x01 /* Data Terminal Ready */
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/* line status register */
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#define LSR_RCV_FIFO 0x80
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#define LSR_TSRE 0x40 /* Transmitter empty: byte sent */
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#define LSR_TXRDY 0x20 /* Transmitter buffer empty */
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#define LSR_BI 0x10 /* Break detected */
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#define LSR_FE 0x08 /* Framing error: bad stop bit */
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#define LSR_PE 0x04 /* Parity error */
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#define LSR_OE 0x02 /* Overrun, lost incoming byte */
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#define LSR_RXRDY 0x01 /* Byte ready in Receive Buffer */
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#define LSR_RCV_MASK 0x1f /* Mask for incoming data or error */
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/* modem status register */
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/* All deltas are from the last read of the MSR. */
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#define MSR_DCD 0x80 /* Current Data Carrier Detect */
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#define MSR_RI 0x40 /* Current Ring Indicator */
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#define MSR_DSR 0x20 /* Current Data Set Ready */
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#define MSR_CTS 0x10 /* Current Clear to Send */
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#define MSR_DDCD 0x08 /* DCD has changed state */
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#define MSR_TERI 0x04 /* RI has toggled low to high */
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#define MSR_DDSR 0x02 /* DSR has changed state */
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#define MSR_DCTS 0x01 /* CTS has changed state */
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/* XXX ISA-specific. */
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#define COM_NPORTS 8
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@ -1,123 +0,0 @@
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/* $NetBSD: comvar.h,v 1.16 1997/10/15 22:00:17 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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int comcnattach __P((bus_space_tag_t, int, int, int, tcflag_t));
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#ifdef KGDB
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int com_kgdb_attach __P((bus_space_tag_t, int, int, int, tcflag_t));
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#endif
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int com_is_console __P((bus_space_tag_t, int, bus_space_handle_t *));
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/* Hardware flag masks */
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#define COM_HW_NOIEN 0x01
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#define COM_HW_FIFO 0x02
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#define COM_HW_HAYESP 0x04
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#define COM_HW_CONSOLE 0x40
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#define COM_HW_KGDB 0x80
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/* Buffer size for character buffer */
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#define RXBUFSIZE 2048 /* More than enough.. */
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#define RXBUFMASK (RXBUFSIZE - 1) /* Only iff previous is a power of 2 */
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#define RXHIWAT ((RXBUFSIZE * 1) / 4)
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#define RXLOWAT ((RXBUFSIZE * 3) / 4)
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struct com_softc {
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struct device sc_dev;
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void *sc_si;
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struct tty *sc_tty;
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int sc_overflows;
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int sc_floods;
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int sc_errors;
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int sc_iobase; /* XXX ISA-centric name */
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int sc_frequency;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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bus_space_handle_t sc_hayespioh;
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u_char sc_hwflags;
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u_char sc_swflags;
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int sc_fifolen;
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u_char sc_msr, sc_msr_delta, sc_msr_mask, sc_mcr, sc_mcr_active, sc_lcr,
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sc_ier, sc_fifo, sc_dlbl, sc_dlbh;
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u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd;
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int sc_r_hiwat;
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int sc_r_lowat;
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volatile u_int sc_rbget;
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volatile u_int sc_rbput;
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volatile u_int sc_rbavail;
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u_char sc_rbuf[RXBUFSIZE];
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u_char sc_lbuf[RXBUFSIZE];
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u_char *sc_tba;
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int sc_tbc,
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sc_heldtbc;
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volatile u_char sc_rx_flags,
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#define RX_TTY_BLOCKED 0x01
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#define RX_TTY_OVERFLOWED 0x02
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#define RX_IBUF_BLOCKED 0x04
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#define RX_IBUF_OVERFLOWED 0x08
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#define RX_ANY_BLOCK 0x0f
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sc_tx_busy,
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sc_tx_done,
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sc_tx_stopped,
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sc_st_check,
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sc_rx_ready;
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volatile u_char sc_heldchange;
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};
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/* Macros to clear/set/test flags. */
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#define SET(t, f) (t) |= (f)
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#define CLR(t, f) (t) &= ~(f)
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#define ISSET(t, f) ((t) & (f))
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int comprobe1 __P((bus_space_tag_t, bus_space_handle_t, int));
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int comintr __P((void *));
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void com_attach_subr __P((struct com_softc *));
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int cominit __P((bus_space_tag_t, int, int, int, tcflag_t,
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bus_space_handle_t *));
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#ifndef __GENERIC_SOFT_INTERRUPTS
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#ifdef alpha
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#define IPL_SERIAL IPL_TTY
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#define splserial() spltty()
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#define IPL_SOFTSERIAL IPL_TTY
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#define splsoftserial() spltty()
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#endif
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#endif
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