1 /* $NetBSD: iris_cons.c,v 1.1 2019/01/12 16:44:47 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 2018 Naruaki Etomi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * Silicon Graphics "IRIS" series MIPS processors machine bootloader. 30 * Front end of Zilog Z8530 Dual UART driver. 31 */ 32 33 #include <lib/libsa/stand.h> 34 35 #include <machine/cpu.h> 36 37 #include "iris_machdep.h" 38 #include "iris_cons.h" 39 #include "iris_zs.h" 40 41 void zscnprobe(struct consdev *); 42 void zscninit(struct consdev *); 43 void zscnputchar(void *, int); 44 int zscngetchar(void *); 45 int zscnscan(void *); 46 47 #define ZSCHAN 0x0 48 #define ZSSPEED 9600 49 50 struct consdev constab[] = { 51 { "zs", ZSCHAN, ZSSPEED, 52 zscnprobe, zscninit, zscngetchar, zscnputchar, zscnscan }, 53 { 0 } 54 }; 55 56 struct consdev *cn_tab; 57 58 char * 59 cninit(int *addr, int *speed) 60 { 61 struct consdev *cp; 62 63 cn_tab = NULL; 64 for (cp = constab; cp->cn_probe; cp++) { 65 (*cp->cn_probe)(cp); 66 if (cp->cn_pri > CN_DEAD && 67 (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri)) 68 cn_tab = cp; 69 } 70 if (cn_tab) { 71 (*cn_tab->cn_init)(cn_tab); 72 *addr = cn_tab->address; 73 *speed = cn_tab->speed; 74 return cn_tab->cn_name; 75 } 76 77 return NULL; 78 } 79 80 int 81 cngetc(void) 82 { 83 84 if (cn_tab) 85 return (*cn_tab->cn_getc)(cn_tab->cn_dev); 86 return 0; 87 } 88 89 void 90 cnputc(int c) 91 { 92 93 if (cn_tab) 94 (*cn_tab->cn_putc)(cn_tab->cn_dev, c); 95 } 96 97 int 98 cnscan(void) 99 { 100 101 if (cn_tab) 102 return (*cn_tab->cn_scan)(cn_tab->cn_dev); 103 return -1; 104 } 105 106 void 107 zscnprobe(struct consdev *cp) 108 { 109 110 cp->cn_pri = CN_REMOTE; 111 } 112 113 void 114 zscninit(struct consdev *cp) 115 { 116 117 cp->cn_dev = zs_init(cp->address, cp->speed); 118 } 119 120 int 121 zscngetchar(void *dev) 122 { 123 124 return zscngetc(dev); 125 } 126 127 void 128 zscnputchar(void *dev, int c) 129 { 130 131 if (c == '\n') 132 zscnputc(dev, '\r'); 133 zscnputc(dev, c); 134 } 135 136 int 137 zscnscan(void *dev) 138 { 139 140 return zscnscanc(dev); 141 } 142