The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/adm5120/console.c

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    1 /* $NetBSD: uart.c,v 1.2 2007/03/23 20:05:47 dogcow Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2007 Ruslan Ermilov and Vsevolod Lobko.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or
    8  * without modification, are permitted provided that the following
    9  * conditions 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
   13  *    copyright notice, this list of conditions and the following
   14  *    disclaimer in the documentation and/or other materials provided
   15  *    with the distribution.
   16  * 3. The names of the authors may not be used to endorse or promote
   17  *    products derived from this software without specific prior
   18  *    written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY
   21  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   23  * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   25  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
   27  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
   29  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   30  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
   31  * OF SUCH DAMAGE.
   32  *
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 #include <sys/types.h>
   39 #include <sys/param.h>
   40 #include <sys/systm.h>
   41 #include <sys/kernel.h>
   42 #include <sys/time.h>
   43 
   44 #include <sys/cons.h>
   45 #include <sys/consio.h>
   46 
   47 static cn_probe_t       uart_cnprobe;
   48 static cn_init_t        uart_cninit;
   49 static cn_term_t        uart_cnterm;
   50 static cn_getc_t        uart_cngetc;
   51 static cn_putc_t        uart_cnputc;
   52 
   53 static void
   54 uart_cnprobe(struct consdev *cp)
   55 {
   56 
   57         sprintf(cp->cn_name, "uart");
   58         cp->cn_pri = CN_NORMAL;
   59 }
   60 
   61 static void
   62 uart_cninit(struct consdev *cp)
   63 {
   64 
   65 }
   66 
   67 
   68 void
   69 uart_cnputc(struct consdev *cp, int c)
   70 {
   71         char chr;
   72 
   73         chr = c;
   74         while ((*((volatile unsigned long *)0xb2600018)) & 0x20) ;
   75         (*((volatile unsigned long *)0xb2600000)) = c;
   76         while ((*((volatile unsigned long *)0xb2600018)) & 0x20) ;
   77 }
   78 
   79 int
   80 uart_cngetc(struct consdev * cp)
   81 {
   82 
   83         while ((*((volatile unsigned long *)0xb2600018)) & 0x10) ;
   84         return (*((volatile unsigned long *)0xb2600000)) & 0xff;
   85 }
   86 
   87 static void
   88 uart_cnterm(struct consdev * cp)
   89 {
   90 
   91 }
   92 
   93 CONSOLE_DRIVER(uart);

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