com.c revision 1.1
1 /* $NetBSD: com.c,v 1.1 2003/05/01 07:02:01 igy Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1991 The Regents of the University of California. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)com.c 7.5 (Berkeley) 5/16/91 72 */ 73 74 #include <sys/param.h> 75 76 #include <lib/libsa/stand.h> 77 78 #include <hpcmips/vr/vripreg.h> 79 #include <hpcmips/vr/cmureg.h> 80 81 #include <dev/ic/comreg.h> 82 #include <dev/ic/ns16550reg.h> 83 #include <dev/ic/st16650reg.h> 84 #define com_lcr com_cfcr 85 86 #include "extern.h" 87 88 #if 0 89 #define VRCOM_FREQ 18432000 /* 18.432kHz */ 90 #endif 91 92 int 93 iskey(void) 94 { 95 return ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_RXRDY); 96 } 97 98 int 99 getchar(void) 100 { 101 u_int8_t stat; 102 u_int8_t c; 103 104 /* block until a character becomes available */ 105 while (!ISKEY) 106 ; 107 108 c = REGREAD_1(VR4181_SIU_ADDR, com_data); 109 stat = REGREAD_1(VR4181_SIU_ADDR, com_iir); 110 111 return c; 112 } 113 114 static void 115 comcnputc(int c) 116 { 117 int timo; 118 119 /* wait for any pending transmission to finish */ 120 timo = 150000; 121 while (!ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_TXRDY) 122 && --timo) 123 continue; 124 125 REGWRITE_1(VR4181_SIU_ADDR, com_data, c); 126 127 /* wait for this transmission to complete */ 128 timo = 1500000; 129 while (!ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_TXRDY) 130 && --timo) 131 continue; 132 } 133 134 void 135 putchar(int c) 136 { 137 if (c == '\n') 138 comcnputc('\r'); 139 comcnputc(c); 140 } 141 142 /* 143 * Initialize UART for use as console or KGDB line. 144 */ 145 void 146 comcninit(void) 147 { 148 int rate; 149 150 /* enable divisor latch access and set bit rate */ 151 REGWRITE_1(VR4181_SIU_ADDR, com_lcr, LCR_DLAB); 152 rate = 10; /* 115200bps with VRCOM_FREQ */ 153 REGWRITE_1(VR4181_SIU_ADDR, com_dlbl, rate); 154 REGWRITE_1(VR4181_SIU_ADDR, com_dlbh, rate >> 8); 155 156 /* 157 * disable divisor latch access and, 158 * set "8bit non-parity 1 stop bit" 159 */ 160 REGWRITE_1(VR4181_SIU_ADDR, com_lcr, LCR_8BITS); 161 162 /* disable all interrupt */ 163 REGWRITE_1(VR4181_SIU_ADDR, com_ier, 0); 164 165 /* enable FIFO */ 166 REGWRITE_1(VR4181_SIU_ADDR, com_fifo, 167 FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1); 168 169 /* set DTR and RTS low */ 170 REGWRITE_1(VR4181_SIU_ADDR, com_mcr, MCR_DTR | MCR_RTS); 171 } 172
Indexes created Mon Oct 13 05:10:05 GMT 2025