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Annotation of Net2/arch/amiga/dev/kbd.c, revision 1.1

1.1     ! root        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

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