1 /* 2 * nullconsole.c 3 * 4 * Author: Doug Ambrisko <ambrisko@whistle.com> 5 * Copyright (c) 2000 Whistle Communications, Inc. 6 * All rights reserved. 7 * 8 * Subject to the following obligations and disclaimer of warranty, use and 9 * redistribution of this software, in source or object code forms, with or 10 * without modifications are expressly permitted by Whistle Communications; 11 * provided, however, that: 12 * 1. Any and all reproductions of the source or object code must include the 13 * copyright notice above and the following disclaimer of warranties; and 14 * 2. No rights are granted, in any manner or form, to use Whistle 15 * Communications, Inc. trademarks, including the mark "WHISTLE 16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 17 * such appears in the above copyright notice or in the software. 18 * 19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 35 * OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 40 #include <stand.h> 41 #include <bootstrap.h> 42 43 static void nullc_probe(struct console *cp); 44 static int nullc_init(struct console *, int arg); 45 static void nullc_putchar(struct console *, int c); 46 static int nullc_getchar(struct console *); 47 static int nullc_ischar(struct console *); 48 static void nullc_devinfo(struct console *); 49 50 struct console nullconsole = { 51 .c_name = "null", 52 .c_desc = "null port", 53 .c_flags = 0, 54 .c_probe = nullc_probe, 55 .c_init = nullc_init, 56 .c_out = nullc_putchar, 57 .c_in = nullc_getchar, 58 .c_ready = nullc_ischar, 59 .c_ioctl = NULL, 60 .c_devinfo = nullc_devinfo, 61 .c_private = NULL 62 }; 63 64 static void 65 nullc_devinfo(struct console *cp __unused) 66 { 67 printf("\tsoftware device"); 68 } 69 70 static void 71 nullc_probe(struct console *cp) 72 { 73 cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT); 74 } 75 76 static int 77 nullc_init(struct console *cp __unused, int arg __unused) 78 { 79 return(0); 80 } 81 82 static void 83 nullc_putchar(struct console *cp __unused, int c __unused) 84 { 85 } 86 87 static int 88 nullc_getchar(struct console *cp __unused) 89 { 90 return(-1); 91 } 92 93 static int 94 nullc_ischar(struct console *cp __unused) 95 { 96 return(0); 97 } 98