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dcm.c revision 1.1 
      1 /*	$NetBSD: dcm.c,v 1.1 1997/02/04 03:52:21 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1990, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by the University of
     23  *	California, Berkeley and its contributors.
     24  * 4. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  *	@(#)dcm.c	8.1 (Berkeley) 6/10/93
     41  */
     42 
     43 #ifdef DCMCONSOLE
     44 #include <sys/param.h>
     45 #include <dev/cons.h>
     46 
     47 #include <hp300/dev/dcmreg.h>
     48 
     49 #include <hp300/stand/common/consdefs.h>
     50 #include <hp300/stand/common/samachdep.h>
     51 #include <hp300/stand/common/device.h>
     52 
     53 struct dcmdevice *dcmcnaddr = NULL;
     54 
     55 #define	DCMCONUNIT	0	/* XXX */
     56 
     57 void
     58 dcmprobe(cp)
     59 	struct consdev *cp;
     60 {
     61 	extern struct hp_hw sc_table[];
     62 	register struct hp_hw *hw;
     63 	register struct dcmdevice *dcm;
     64 
     65 	for (hw = sc_table; hw < &sc_table[MAXCTLRS]; hw++)
     66 		if (HW_ISDEV(hw, D_COMMDCM) && !badaddr((caddr_t)hw->hw_kva))
     67 			break;
     68 	if (!HW_ISDEV(hw, D_COMMDCM)) {
     69 		cp->cn_pri = CN_DEAD;
     70 		return;
     71 	}
     72 	dcmcnaddr = (struct dcmdevice *) hw->hw_kva;
     73 
     74 	dcm = dcmcnaddr;
     75 	switch (dcm->dcm_rsid) {
     76 	case DCMID:
     77 		cp->cn_pri = CN_NORMAL;
     78 		break;
     79 	case DCMID|DCMCON:
     80 		cp->cn_pri = CN_REMOTE;
     81 		break;
     82 	default:
     83 		cp->cn_pri = CN_DEAD;
     84 		break;
     85 	}
     86 
     87 	curcons_scode = hw->hw_sc;
     88 }
     89 
     90 void
     91 dcminit(cp)
     92 	struct consdev *cp;
     93 {
     94 	register struct dcmdevice *dcm = dcmcnaddr;
     95 	register int port = DCMCONUNIT;
     96 
     97 	dcm->dcm_ic = IC_ID;
     98 	while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr)
     99 		;
    100 	dcm->dcm_data[port].dcm_baud = BR_9600;
    101 	dcm->dcm_data[port].dcm_conf = LC_8BITS | LC_1STOP;
    102 	SEM_LOCK(dcm);
    103 	dcm->dcm_cmdtab[port].dcm_data |= CT_CON;
    104 	dcm->dcm_cr |= (1 << port);
    105 	SEM_UNLOCK(dcm);
    106 	DELAY(15000);
    107 }
    108 
    109 /* ARGSUSED */
    110 #ifndef SMALL
    111 int
    112 dcmgetchar(dev)
    113 	dev_t dev;
    114 {
    115 	register struct dcmdevice *dcm = dcmcnaddr;
    116 	register struct dcmrfifo *fifo;
    117 	register struct dcmpreg *pp;
    118 	register unsigned head;
    119 	int c, stat, port;
    120 
    121 	port = DCMCONUNIT;
    122 	pp = dcm_preg(dcm, port);
    123 	head = pp->r_head & RX_MASK;
    124 	if (head == (pp->r_tail & RX_MASK))
    125 		return(0);
    126 	fifo = &dcm->dcm_rfifos[3-port][head>>1];
    127 	c = fifo->data_char;
    128 	stat = fifo->data_stat;
    129 	pp->r_head = (head + 2) & RX_MASK;
    130 	SEM_LOCK(dcm);
    131 	stat = dcm->dcm_iir;
    132 	SEM_UNLOCK(dcm);
    133 	return(c);
    134 }
    135 #else
    136 int
    137 dcmgetchar(dev)
    138 	dev_t dev;
    139 {
    140 	return(0);
    141 }
    142 #endif
    143 
    144 /* ARGSUSED */
    145 void
    146 dcmputchar(dev, c)
    147 	dev_t dev;
    148 	register int c;
    149 {
    150 	register struct dcmdevice *dcm = dcmcnaddr;
    151 	register struct dcmpreg *pp;
    152 	register int timo;
    153 	unsigned tail;
    154 	int port, stat;
    155 
    156 	port = DCMCONUNIT;
    157 	pp = dcm_preg(dcm, port);
    158 	tail = pp->t_tail & TX_MASK;
    159 	timo = 50000;
    160 	while (tail != (pp->t_head & TX_MASK) && --timo)
    161 		;
    162 	dcm->dcm_tfifos[3-port][tail].data_char = c;
    163 	pp->t_tail = tail = (tail + 1) & TX_MASK;
    164 	SEM_LOCK(dcm);
    165 	dcm->dcm_cmdtab[port].dcm_data |= CT_TX;
    166 	dcm->dcm_cr |= (1 << port);
    167 	SEM_UNLOCK(dcm);
    168 	timo = 1000000;
    169 	while (tail != (pp->t_head & TX_MASK) && --timo)
    170 		;
    171 	SEM_LOCK(dcm);
    172 	stat = dcm->dcm_iir;
    173 	SEM_UNLOCK(dcm);
    174 }
    175 #endif
    176