Annotation of sys/arch/hp300/stand/common/dcm.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: dcm.c,v 1.5 2006/08/17 06:31:10 miod Exp $ */
! 2: /* $NetBSD: dcm.c,v 1.2 1997/04/14 05:58:32 scottr Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1988 University of Utah.
! 6: * Copyright (c) 1990, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: *
! 9: * This code is derived from software contributed to Berkeley by
! 10: * the Systems Programming Group of the University of Utah Computer
! 11: * Science Department.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * @(#)dcm.c 8.1 (Berkeley) 6/10/93
! 38: */
! 39:
! 40: #ifdef DCMCONSOLE
! 41: #include <sys/param.h>
! 42:
! 43: #include <hp300/dev/dcmreg.h>
! 44:
! 45: #include "samachdep.h"
! 46: #include "consdefs.h"
! 47: #include "device.h"
! 48:
! 49: struct dcmdevice *dcmcnaddr = NULL;
! 50:
! 51: #define DCMCONUNIT 1 /* XXX */
! 52:
! 53: void
! 54: dcmprobe(struct consdev *cp)
! 55: {
! 56: extern struct hp_hw sc_table[];
! 57: struct hp_hw *hw;
! 58: struct dcmdevice *dcm;
! 59:
! 60: for (hw = sc_table; hw < &sc_table[MAXCTLRS]; hw++)
! 61: if (HW_ISDEV(hw, D_COMMDCM) && !badaddr((caddr_t)hw->hw_kva))
! 62: break;
! 63: if (!HW_ISDEV(hw, D_COMMDCM))
! 64: return;
! 65: dcmcnaddr = (struct dcmdevice *) hw->hw_kva;
! 66:
! 67: dcm = dcmcnaddr;
! 68: switch (dcm->dcm_rsid) {
! 69: case DCMID:
! 70: cp->cn_pri = CN_NORMAL;
! 71: break;
! 72: case DCMID|DCMCON:
! 73: cp->cn_pri = CN_REMOTE;
! 74: break;
! 75: default:
! 76: break;
! 77: }
! 78: }
! 79:
! 80: void
! 81: dcminit(struct consdev *cp)
! 82: {
! 83: struct dcmdevice *dcm = dcmcnaddr;
! 84: int port = DCMCONUNIT;
! 85:
! 86: dcm->dcm_ic = IC_ID;
! 87: while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr)
! 88: ;
! 89: dcm->dcm_data[port].dcm_baud = BR_9600;
! 90: dcm->dcm_data[port].dcm_conf = LC_8BITS | LC_1STOP;
! 91: SEM_LOCK(dcm);
! 92: dcm->dcm_cmdtab[port].dcm_data |= CT_CON;
! 93: dcm->dcm_cr |= (1 << port);
! 94: SEM_UNLOCK(dcm);
! 95: DELAY(15000);
! 96: }
! 97:
! 98: /* ARGSUSED */
! 99: int
! 100: dcmgetchar(dev_t dev)
! 101: {
! 102: #ifndef SMALL
! 103: struct dcmdevice *dcm = dcmcnaddr;
! 104: struct dcmrfifo *fifo;
! 105: struct dcmpreg *pp;
! 106: unsigned head;
! 107: int c, stat, port;
! 108:
! 109: port = DCMCONUNIT;
! 110: pp = dcm_preg(dcm, port);
! 111: head = pp->r_head & RX_MASK;
! 112: if (head == (pp->r_tail & RX_MASK))
! 113: return(0);
! 114: fifo = &dcm->dcm_rfifos[3-port][head>>1];
! 115: c = fifo->data_char;
! 116: stat = fifo->data_stat;
! 117: pp->r_head = (head + 2) & RX_MASK;
! 118: SEM_LOCK(dcm);
! 119: stat = dcm->dcm_iir;
! 120: SEM_UNLOCK(dcm);
! 121: return(c);
! 122: #else
! 123: return(0);
! 124: #endif
! 125: }
! 126:
! 127: /* ARGSUSED */
! 128: void
! 129: dcmputchar(dev_t dev, int c)
! 130: {
! 131: struct dcmdevice *dcm = dcmcnaddr;
! 132: struct dcmpreg *pp;
! 133: int timo;
! 134: unsigned tail;
! 135: int port, stat;
! 136:
! 137: port = DCMCONUNIT;
! 138: pp = dcm_preg(dcm, port);
! 139: tail = pp->t_tail & TX_MASK;
! 140: timo = 50000;
! 141: while (tail != (pp->t_head & TX_MASK) && --timo)
! 142: ;
! 143: dcm->dcm_tfifos[3-port][tail].data_char = c;
! 144: pp->t_tail = tail = (tail + 1) & TX_MASK;
! 145: SEM_LOCK(dcm);
! 146: dcm->dcm_cmdtab[port].dcm_data |= CT_TX;
! 147: dcm->dcm_cr |= (1 << port);
! 148: SEM_UNLOCK(dcm);
! 149: timo = 1000000;
! 150: while (tail != (pp->t_head & TX_MASK) && --timo)
! 151: ;
! 152: SEM_LOCK(dcm);
! 153: stat = dcm->dcm_iir;
! 154: SEM_UNLOCK(dcm);
! 155: }
! 156: #endif
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