dca.c revision 1.4
1 /* $NetBSD: dca.c,v 1.4 2003/11/14 16:52:40 tsutsui 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 * @(#)dca.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 * @(#)dca.c 8.1 (Berkeley) 6/10/93 73 */ 74 75 #ifdef DCACONSOLE 76 #include <sys/param.h> 77 #include <dev/cons.h> 78 79 #include <hp300/stand/common/dcareg.h> 80 #include <hp300/stand/common/consdefs.h> 81 #include <hp300/stand/common/samachdep.h> 82 83 /* If not using 4.4 devs */ 84 #ifndef dca_reset 85 #define dca_id dca_irid 86 #define dca_reset dca_id 87 #endif 88 89 struct dcadevice *dcacnaddr = 0; 90 91 #define DCACONSCODE 9 /* XXX */ 92 93 void 94 dcaprobe(cp) 95 struct consdev *cp; 96 { 97 struct dcadevice *dca; 98 99 dcacnaddr = (struct dcadevice *) sctoaddr(DCACONSCODE); 100 if (badaddr((char *)dcacnaddr)) { 101 cp->cn_pri = CN_DEAD; 102 return; 103 } 104 #ifdef FORCEDCACONSOLE 105 cp->cn_pri = CN_REMOTE; 106 #else 107 dca = dcacnaddr; 108 switch (dca->dca_id) { 109 case DCAID0: 110 case DCAID1: 111 cp->cn_pri = CN_NORMAL; 112 break; 113 case DCAREMID0: 114 case DCAREMID1: 115 cp->cn_pri = CN_REMOTE; 116 break; 117 default: 118 cp->cn_pri = CN_DEAD; 119 break; 120 } 121 122 #endif 123 curcons_scode = DCACONSCODE; 124 } 125 126 void 127 dcainit(cp) 128 struct consdev *cp; 129 { 130 struct dcadevice *dca = dcacnaddr; 131 132 dca->dca_reset = 0xFF; 133 DELAY(100); 134 dca->dca_ic = 0; 135 dca->dca_cfcr = CFCR_DLAB; 136 dca->dca_data = DCABRD(9600) & 0xFF; 137 dca->dca_ier = DCABRD(9600) >> 8; 138 dca->dca_cfcr = CFCR_8BITS; 139 dca->dca_fifo = 140 FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1; 141 dca->dca_mcr = MCR_DTR | MCR_RTS; 142 } 143 144 /* ARGSUSED */ 145 #ifndef SMALL 146 int 147 dcagetchar(dev) 148 dev_t dev; 149 { 150 struct dcadevice *dca = dcacnaddr; 151 short stat; 152 int c; 153 154 if (((stat = dca->dca_lsr) & LSR_RXRDY) == 0) 155 return 0; 156 c = dca->dca_data; 157 return c; 158 } 159 #else 160 int 161 dcagetchar(dev) 162 dev_t dev; 163 { 164 165 return 0; 166 } 167 #endif 168 169 /* ARGSUSED */ 170 void 171 dcaputchar(dev, c) 172 dev_t dev; 173 int c; 174 { 175 struct dcadevice *dca = dcacnaddr; 176 int timo; 177 short stat; 178 179 /* wait a reasonable time for the transmitter to come ready */ 180 timo = 50000; 181 while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo) 182 ; 183 dca->dca_data = c; 184 /* wait for this transmission to complete */ 185 timo = 1000000; 186 while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo) 187 ; 188 } 189 #endif 190
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