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Diffstat (limited to 'sys/arch/hp300/stand/dca.c')
| -rw-r--r-- | sys/arch/hp300/stand/dca.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/sys/arch/hp300/stand/dca.c b/sys/arch/hp300/stand/dca.c new file mode 100644 index 00000000000..9253d141bcc --- /dev/null +++ b/sys/arch/hp300/stand/dca.c @@ -0,0 +1,151 @@ +/* $NetBSD: dca.c,v 1.8 1995/10/04 06:54:44 thorpej Exp $ */ + +/* + * Copyright (c) 1988 University of Utah. + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * the Systems Programming Group of the University of Utah Computer + * Science Department. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)dca.c 8.1 (Berkeley) 6/10/93 + */ + +#ifdef DCACONSOLE +#include <sys/param.h> +#include <dev/cons.h> + +#include <hp300/dev/dcareg.h> +#include <hp300/stand/consdefs.h> +#include <hp300/stand/samachdep.h> + +/* If not using 4.4 devs */ +#ifndef dca_reset +#define dca_id dca_irid +#define dca_reset dca_id +#endif + +struct dcadevice *dcacnaddr = 0; + +void +dcaprobe(cp) + struct consdev *cp; +{ + register struct dcadevice *dca; + + dcacnaddr = (struct dcadevice *) sctoaddr(CONSCODE); + if (badaddr((char *)dcacnaddr)) { + cp->cn_pri = CN_DEAD; + return; + } +#ifdef FORCEDCACONSOLE + cp->cn_pri = CN_REMOTE; +#else + dca = dcacnaddr; + switch (dca->dca_id) { + case DCAID0: + case DCAID1: + cp->cn_pri = CN_NORMAL; + break; + case DCAREMID0: + case DCAREMID1: + cp->cn_pri = CN_REMOTE; + break; + default: + cp->cn_pri = CN_DEAD; + break; + } + +#endif + curcons_scode = CONSCODE; +} + +void +dcainit(cp) + struct consdev *cp; +{ + register struct dcadevice *dca = dcacnaddr; + + dca->dca_reset = 0xFF; + DELAY(100); + dca->dca_ic = 0; + dca->dca_cfcr = CFCR_DLAB; + dca->dca_data = DCABRD(9600) & 0xFF; + dca->dca_ier = DCABRD(9600) >> 8; + dca->dca_cfcr = CFCR_8BITS; +} + +/* ARGSUSED */ +#ifndef SMALL +int +dcagetchar(dev) + dev_t dev; +{ + register struct dcadevice *dca = dcacnaddr; + short stat; + int c; + + if (((stat = dca->dca_lsr) & LSR_RXRDY) == 0) + return(0); + c = dca->dca_data; + return(c); +} +#else +int +dcagetchar(dev) + dev_t dev; +{ + return(0); +} +#endif + +/* ARGSUSED */ +void +dcaputchar(dev, c) + dev_t dev; + register int c; +{ + register struct dcadevice *dca = dcacnaddr; + register int timo; + short stat; + + /* wait a reasonable time for the transmitter to come ready */ + timo = 50000; + while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo) + ; + dca->dca_data = c; + /* wait for this transmission to complete */ + timo = 1000000; + while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo) + ; +} +#endif |