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ttycons.c revision 1.5 
      1 /* $NetBSD: ttycons.c,v 1.5 2011/08/28 21:21:05 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca>
      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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: ttycons.c,v 1.5 2011/08/28 21:21:05 jmcneill Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/proc.h>
     34 #include <sys/systm.h>
     35 #include <sys/device.h>
     36 #include <sys/termios.h>
     37 
     38 #include <dev/cons.h>
     39 
     40 #include <machine/mainbus.h>
     41 #include <machine/thunk.h>
     42 
     43 static int	ttycons_match(device_t, cfdata_t, void *);
     44 static void	ttycons_attach(device_t, device_t, void *);
     45 
     46 void		ttycons_consinit(void);
     47 
     48 typedef struct ttycons_softc {
     49 	device_t	sc_dev;
     50 } ttycons_softc_t;
     51 
     52 dev_type_cngetc(ttycons_cngetc);
     53 dev_type_cnputc(ttycons_cnputc);
     54 dev_type_cnpollc(ttycons_cnpollc);
     55 
     56 static struct cnm_state ttycons_cnm_state;
     57 struct consdev ttycons_consdev = {
     58 	.cn_getc = ttycons_cngetc,
     59 	.cn_putc = ttycons_cnputc,
     60 	.cn_pollc = ttycons_cnpollc,
     61 };
     62 
     63 CFATTACH_DECL_NEW(ttycons, sizeof(ttycons_softc_t),
     64     ttycons_match, ttycons_attach, NULL, NULL);
     65 
     66 static int
     67 ttycons_match(device_t parent, cfdata_t match, void *opaque)
     68 {
     69 	struct thunkbus_attach_args *taa = opaque;
     70 
     71 	if (taa->taa_type != THUNKBUS_TYPE_TTYCONS)
     72 		return 0;
     73 
     74 	return 1;
     75 }
     76 
     77 static void
     78 ttycons_attach(device_t parent, device_t self, void *opaque)
     79 {
     80 	ttycons_softc_t *sc = device_private(self);
     81 
     82 	aprint_naive("\n");
     83 	aprint_normal(": console\n");
     84 
     85 	sc->sc_dev = self;
     86 }
     87 
     88 void
     89 ttycons_consinit(void)
     90 {
     91 	struct thunk_termios t;
     92 
     93 	thunk_tcgetattr(0, &t);
     94 	t.c_lflag &= ~(ECHO|ICANON);
     95 	t.c_cc[VTIME] = 0;
     96 	t.c_cc[VMIN] = 1;
     97 	thunk_tcsetattr(0, TCSANOW, &t);
     98 
     99 	cn_tab = &ttycons_consdev;
    100 	cn_init_magic(&ttycons_cnm_state);
    101 	cn_set_magic("\047\001");
    102 
    103 
    104 }
    105 
    106 int
    107 ttycons_cngetc(dev_t dev)
    108 {
    109 	return thunk_getchar();
    110 }
    111 
    112 void
    113 ttycons_cnputc(dev_t dev, int c)
    114 {
    115 	thunk_putchar(c);
    116 }
    117 
    118 void
    119 ttycons_cnpollc(dev_t dev, int on)
    120 {
    121 }
    122