f6def40e18
At the moment grab and ungrab methods of all console drivers are no-ops. Current intended meaning of the calls is that the kernel takes control of console input. In the future the semantics may be extended to mean that the calling thread takes full ownership of the console (e.g. console output from other threads could be suspended). Inspired by: bde MFC after: 2 months
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/* $NetBSD: uart.c,v 1.2 2007/03/23 20:05:47 dogcow Exp $ */
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/*-
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* Copyright (c) 2007 Ruslan Ermilov and Vsevolod Lobko.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/time.h>
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#include <sys/cons.h>
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#include <sys/consio.h>
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static cn_probe_t uart_cnprobe;
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static cn_init_t uart_cninit;
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static cn_term_t uart_cnterm;
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static cn_getc_t uart_cngetc;
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static cn_putc_t uart_cnputc;
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static cn_grab_t uart_cngrab;
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static cn_ungrab_t uart_cnungrab;
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static void
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uart_cnprobe(struct consdev *cp)
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{
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sprintf(cp->cn_name, "uart");
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cp->cn_pri = CN_NORMAL;
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}
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static void
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uart_cninit(struct consdev *cp)
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{
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}
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void
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uart_cnputc(struct consdev *cp, int c)
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{
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char chr;
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chr = c;
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while ((*((volatile unsigned long *)0xb2600018)) & 0x20) ;
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(*((volatile unsigned long *)0xb2600000)) = c;
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while ((*((volatile unsigned long *)0xb2600018)) & 0x20) ;
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}
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int
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uart_cngetc(struct consdev * cp)
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{
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while ((*((volatile unsigned long *)0xb2600018)) & 0x10) ;
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return (*((volatile unsigned long *)0xb2600000)) & 0xff;
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}
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static void
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uart_cnterm(struct consdev * cp)
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{
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}
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static void
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uart_cngrab(struct consdev *cp)
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{
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}
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static void
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uart_cnungrab(struct consdev *cp)
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{
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}
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CONSOLE_DRIVER(uart);
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