1 /* $NetBSD: com.c,v 1.4 2008/04/28 20:23:21 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1991 The Regents of the University of California. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)com.c 7.5 (Berkeley) 5/16/91 61 */ 62 63 #include <sys/param.h> 64 65 #include <lib/libsa/stand.h> 66 67 #include <hpcmips/vr/vripreg.h> 68 #include <hpcmips/vr/cmureg.h> 69 70 #include <dev/ic/comreg.h> 71 #include <dev/ic/ns16550reg.h> 72 #include <dev/ic/st16650reg.h> 73 #define com_lcr com_cfcr 74 75 #include "extern.h" 76 77 #if 0 78 #define VRCOM_FREQ 18432000 /* 18.432kHz */ 79 #endif 80 81 int 82 iskey(void) 83 { 84 return ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_RXRDY); 85 } 86 87 int 88 getchar(void) 89 { 90 u_int8_t stat; 91 u_int8_t c; 92 93 /* block until a character becomes available */ 94 while (!ISKEY) 95 ; 96 97 c = REGREAD_1(VR4181_SIU_ADDR, com_data); 98 stat = REGREAD_1(VR4181_SIU_ADDR, com_iir); 99 100 return c; 101 } 102 103 static void 104 comcnputc(int c) 105 { 106 int timo; 107 108 /* wait for any pending transmission to finish */ 109 timo = 150000; 110 while (!ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_TXRDY) 111 && --timo) 112 continue; 113 114 REGWRITE_1(VR4181_SIU_ADDR, com_data, c); 115 116 /* wait for this transmission to complete */ 117 timo = 1500000; 118 while (!ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_TXRDY) 119 && --timo) 120 continue; 121 } 122 123 void 124 putchar(int c) 125 { 126 if (c == '\n') 127 comcnputc('\r'); 128 comcnputc(c); 129 } 130 131 /* 132 * Initialize UART for use as console or KGDB line. 133 */ 134 void 135 comcninit(void) 136 { 137 int rate; 138 139 /* enable divisor latch access and set bit rate */ 140 REGWRITE_1(VR4181_SIU_ADDR, com_lcr, LCR_DLAB); 141 rate = 10; /* 115200bps with VRCOM_FREQ */ 142 REGWRITE_1(VR4181_SIU_ADDR, com_dlbl, rate); 143 REGWRITE_1(VR4181_SIU_ADDR, com_dlbh, rate >> 8); 144 145 /* 146 * disable divisor latch access and, 147 * set "8bit non-parity 1 stop bit" 148 */ 149 REGWRITE_1(VR4181_SIU_ADDR, com_lcr, LCR_8BITS); 150 151 /* disable all interrupt */ 152 REGWRITE_1(VR4181_SIU_ADDR, com_ier, 0); 153 154 /* enable FIFO */ 155 REGWRITE_1(VR4181_SIU_ADDR, com_fifo, 156 FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1); 157 158 /* set DTR and RTS low */ 159 REGWRITE_1(VR4181_SIU_ADDR, com_mcr, MCR_DTR | MCR_RTS); 160 } 161
Indexes created Sat Sep 20 22:09:52 GMT 2025