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kbd.c revision 1.1 
      1 /*
      2  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	kbd.c
     34  */
     35 
     36 #include "ite.h"
     37 
     38 #if NITE > 0
     39 #include "sys/param.h"
     40 #include "sys/systm.h"
     41 #include "sys/ioctl.h"
     42 #include "sys/tty.h"
     43 #include "sys/proc.h"
     44 #include "sys/conf.h"
     45 #include "sys/file.h"
     46 #include "sys/uio.h"
     47 #include "sys/kernel.h"
     48 #include "sys/syslog.h"
     49 
     50 #include "device.h"
     51 #include "kbdreg.h"
     52 #include "itevar.h"
     53 #include "machine/cpu.h"
     54 
     55 #include "../amiga/custom.h"
     56 #include "../amiga/cia.h"
     57 
     58 void
     59 kbdenable ()
     60 {
     61   int s = spltty();
     62 
     63   /* collides with external ints from SCSI, watch out for this when
     64      enabling/disabling interrupts there !! */
     65   custom.intena = INTF_SETCLR | INTF_PORTS;
     66   ciaa.icr = (1<<7) | (1<<3);	/* SP interrupt enable */
     67   ciaa.cra &= ~(1<<6);		/* serial line == input */
     68 
     69   splx (s);
     70 }
     71 
     72 
     73 int
     74 kbdintr ()
     75 {
     76   /* THIS CLEARS ALL INTERRUPTS FROM CIAA! Will need a special cia
     77      interrupt handler to be able to use the ciaa timers besides driving
     78      the keyboard !! */
     79   u_char ints = ciaa.icr;
     80   u_char c, in;
     81 
     82   if (! (ints & (1<<3)))
     83     return 0;
     84 
     85   in = ciaa.sdr;
     86   /* ack */
     87   ciaa.cra |= (1 << 6);	/* serial line output */
     88   /* wait 85 microseconds */
     89   DELAY(85);
     90   ciaa.cra &= ~(1 << 6);
     91 
     92   c = ~in;	/* keyboard data is inverted */
     93 
     94   /* process the character.
     95 
     96      Should implement RAW mode for X11 later here !! */
     97   c = (c >> 1) | (c << 7);	/* rotate right once */
     98 
     99   itefilter (c, ITEFILT_TTY);
    100 }
    101 
    102 
    103 int
    104 kbdbell()
    105 {
    106 
    107  /* not yet.. */
    108 
    109 }
    110 
    111 
    112 int
    113 kbdgetcn ()
    114 {
    115   int s = spltty ();
    116   u_char ints, c, in;
    117 
    118   /* this is very very nasty... */
    119   while (! (ciaa.icr & (1<<3))) ;
    120 
    121   in = ciaa.sdr;
    122   c = ~in;
    123 
    124   /* ack */
    125   ciaa.cra |= (1 << 6);	/* serial line output */
    126   ciaa.sdr = 0xff;		/* ack */
    127   /* wait 85 microseconds */
    128   DELAY(85);    /* XXXX only works as long as DELAY doesn't use a timer and waits.. */
    129   ciaa.cra &= ~(1 << 6);
    130   ciaa.sdr = in;
    131 
    132   splx (s);
    133   c = (c >> 1) | (c << 7);
    134   return c;
    135 }
    136 
    137 #endif
    138