dcm.c revision 1.5.4.1
1 /* $NetBSD: dcm.c,v 1.5.4.1 2007/09/03 14:25:27 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)dcm.c 8.1 (Berkeley) 6/10/93 36 */ 37 /* 38 * Copyright (c) 1988 University of Utah. 39 * 40 * This code is derived from software contributed to Berkeley by 41 * the Systems Programming Group of the University of Utah Computer 42 * Science Department. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * @(#)dcm.c 8.1 (Berkeley) 6/10/93 73 */ 74 75 #ifdef DCMCONSOLE 76 #include <sys/param.h> 77 #include <dev/cons.h> 78 79 #include <hp300/dev/dcmreg.h> 80 81 #include <hp300/stand/common/consdefs.h> 82 #include <hp300/stand/common/samachdep.h> 83 #include <hp300/stand/common/device.h> 84 85 struct dcmdevice *dcmcnaddr = NULL; 86 87 #define DCMCONUNIT 1 /* XXX */ 88 89 void 90 dcmprobe(struct consdev *cp) 91 { 92 struct hp_hw *hw; 93 struct dcmdevice *dcm; 94 95 for (hw = sc_table; hw < &sc_table[MAXCTLRS]; hw++) 96 if (HW_ISDEV(hw, D_COMMDCM) && !badaddr((void *)hw->hw_kva)) 97 break; 98 if (!HW_ISDEV(hw, D_COMMDCM)) { 99 cp->cn_pri = CN_DEAD; 100 return; 101 } 102 dcmcnaddr = (struct dcmdevice *) hw->hw_kva; 103 104 #ifdef FORCEDCMCONSOLE 105 cp->cn_pri = CN_REMOTE; 106 #else 107 dcm = dcmcnaddr; 108 switch (dcm->dcm_rsid) { 109 case DCMID: 110 cp->cn_pri = CN_NORMAL; 111 break; 112 case DCMID|DCMCON: 113 cp->cn_pri = CN_REMOTE; 114 break; 115 default: 116 cp->cn_pri = CN_DEAD; 117 break; 118 } 119 120 curcons_scode = hw->hw_sc; 121 #endif 122 } 123 124 void 125 dcminit(struct consdev *cp) 126 { 127 struct dcmdevice *dcm = dcmcnaddr; 128 int port = DCMCONUNIT; 129 130 dcm->dcm_ic = IC_ID; 131 while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr) 132 ; 133 dcm->dcm_data[port].dcm_baud = BR_9600; 134 dcm->dcm_data[port].dcm_conf = LC_8BITS | LC_1STOP; 135 SEM_LOCK(dcm); 136 dcm->dcm_cmdtab[port].dcm_data |= CT_CON; 137 dcm->dcm_cr |= (1 << port); 138 SEM_UNLOCK(dcm); 139 DELAY(15000); 140 } 141 142 /* ARGSUSED */ 143 #ifndef SMALL 144 int 145 dcmgetchar(dev_t dev) 146 { 147 struct dcmdevice *dcm = dcmcnaddr; 148 struct dcmrfifo *fifo; 149 struct dcmpreg *pp; 150 unsigned int head; 151 int c, stat, port; 152 153 port = DCMCONUNIT; 154 pp = dcm_preg(dcm, port); 155 head = pp->r_head & RX_MASK; 156 if (head == (pp->r_tail & RX_MASK)) 157 return 0; 158 fifo = &dcm->dcm_rfifos[3-port][head>>1]; 159 c = fifo->data_char; 160 stat = fifo->data_stat; 161 pp->r_head = (head + 2) & RX_MASK; 162 SEM_LOCK(dcm); 163 stat = dcm->dcm_iir; 164 SEM_UNLOCK(dcm); 165 return c; 166 } 167 #else 168 int 169 dcmgetchar(dev_t dev) 170 { 171 172 return 0; 173 } 174 #endif 175 176 /* ARGSUSED */ 177 void 178 dcmputchar(dev_t dev, int c) 179 { 180 struct dcmdevice *dcm = dcmcnaddr; 181 struct dcmpreg *pp; 182 int timo; 183 unsigned int tail; 184 int port, stat; 185 186 port = DCMCONUNIT; 187 pp = dcm_preg(dcm, port); 188 tail = pp->t_tail & TX_MASK; 189 timo = 50000; 190 while (tail != (pp->t_head & TX_MASK) && --timo) 191 ; 192 dcm->dcm_tfifos[3-port][tail].data_char = c; 193 pp->t_tail = tail = (tail + 1) & TX_MASK; 194 SEM_LOCK(dcm); 195 dcm->dcm_cmdtab[port].dcm_data |= CT_TX; 196 dcm->dcm_cr |= (1 << port); 197 SEM_UNLOCK(dcm); 198 timo = 1000000; 199 while (tail != (pp->t_head & TX_MASK) && --timo) 200 ; 201 SEM_LOCK(dcm); 202 stat = dcm->dcm_iir; 203 SEM_UNLOCK(dcm); 204 } 205 #endif 206
Indexes created Thu Oct 23 22:10:10 GMT 2025