NetBSD/sys/arch/amiga/dev/kbd.c

/*	$NetBSD: kbd.c,v 1.18 1996/04/21 21:12:05 veego Exp $	*/

/*
 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	kbd.c
 */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/signalvar.h>
#include <dev/cons.h>
#include <machine/cpu.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/cia.h>
#include <amiga/dev/itevar.h>
#include <amiga/dev/kbdreg.h>
#include <amiga/dev/kbdmap.h>
#include <amiga/dev/event_var.h>
#include <amiga/dev/vuid_event.h>
#include "kbd.h"

#include <sys/conf.h>
#include <machine/conf.h>

struct kbd_softc {
	int k_event_mode;	/* if true, collect events, else pass to ite */
	struct evvar k_events;	/* event queue state */
};
struct kbd_softc kbd_softc;

int kbdmatch __P((struct device *, void *, void *));
void kbdattach __P((struct device *, struct device *, void *));
void kbdintr __P((int));

struct cfattach kbd_ca = {
	sizeof(struct device), kbdmatch, kbdattach
};

struct cfdriver kbd_cd = {
	NULL, "kbd", DV_DULL, NULL, 0
};

/*ARGSUSED*/
int
kbdmatch(pdp, match, auxp)
	struct device *pdp;
	void *match, *auxp;
{

	if (matchname((char *)auxp, "kbd"))
		return(1);
	return(0);
}

/*ARGSUSED*/
void
kbdattach(pdp, dp, auxp)
	struct device *pdp, *dp;
	void *auxp;
{
	printf("\n");
}

/* definitions for amiga keyboard encoding. */
#define KEY_CODE(c)  ((c) & 0x7f)
#define KEY_UP(c)    ((c) & 0x80)

void
kbdenable()
{
	int s;

	/*
	 * collides with external ints from SCSI, watch out for this when
	 * enabling/disabling interrupts there !!
	 */
	s = spltty();
	custom.intena = INTF_SETCLR | INTF_PORTS;
	ciaa.icr = CIA_ICR_IR_SC | CIA_ICR_SP;  /* SP interrupt enable */
	ciaa.cra &= ~(1<<6);		/* serial line == input */
	kbd_softc.k_event_mode = 0;
	kbd_softc.k_events.ev_io = 0;
	splx(s);
}


int
kbdopen(dev, flags, mode, p)
	dev_t dev;
	int flags, mode;
	struct proc *p;
{

	if (kbd_softc.k_events.ev_io)
		return EBUSY;

	kbd_softc.k_events.ev_io = p;
	ev_init(&kbd_softc.k_events);
	return (0);
}

int
kbdclose(dev, flags, mode, p)
	dev_t dev;
	int flags, mode;
	struct proc *p;
{

	/* Turn off event mode, dump the queue */
	kbd_softc.k_event_mode = 0;
	ev_fini(&kbd_softc.k_events);
	kbd_softc.k_events.ev_io = NULL;
	return (0);
}

int
kbdread(dev, uio, flags)
	dev_t dev;
	struct uio *uio;
	int flags;
{
	return ev_read (&kbd_softc.k_events, uio, flags);
}

int
kbdioctl(dev, cmd, data, flag, p)
	dev_t dev;
	u_long cmd;
	register caddr_t data;
	int flag;
	struct proc *p;
{
	register struct kbd_softc *k = &kbd_softc;

	switch (cmd) {
		case KIOCTRANS:
			if (*(int *)data == TR_UNTRANS_EVENT)
				return 0;
			break;

		case KIOCGTRANS:
			/* Get translation mode */
			*(int *)data = TR_UNTRANS_EVENT;
			return 0;

		case KIOCSDIRECT:
			k->k_event_mode = *(int *)data;
			return 0;

		case FIONBIO:	/* we will remove this someday (soon???) */
			return 0;

		case FIOASYNC:
			k->k_events.ev_async = *(int *)data != 0;
			return 0;

		case TIOCSPGRP:
			if (*(int *)data != k->k_events.ev_io->p_pgid)
				return EPERM;
			return 0;

		default:
			return ENOTTY;
	}

	/* We identified the ioctl, but we do not handle it. */
	return EOPNOTSUPP;	/* misuse, but what the heck */
}

int
kbdselect(dev, rw, p)
	dev_t dev;
	int rw;
	struct proc *p;
{
	return ev_select (&kbd_softc.k_events, rw, p);
}


void
kbdintr(mask)
	int mask;
{
	u_char c;
	struct kbd_softc *k = &kbd_softc;
	struct firm_event *fe;
	int put;
#ifdef KBDRESET
	static int reset_warn;
#endif
 
	/* now only invoked from generic CIA interrupt handler if there *is*
	 * a keyboard interrupt pending
	 */
    
	c = ~ciaa.sdr;	/* keyboard data is inverted */
	/* ack */
	ciaa.cra |= (1 << 6);	/* serial line output */
#ifdef KBDRESET
	if (reset_warn && c == 0xf0) {
#ifdef DEBUG
		printf ("kbdintr: !!!! Reset Warning !!!!\n");
#endif
		bootsync();
		reset_warn = 0;
		DELAY(30000000);
	}
#endif
	/* wait 200 microseconds (for bloody Cherry keyboards..) */
	DELAY(2000);			/* fudge delay a bit for some keyboards */
	ciaa.cra &= ~(1 << 6);

	/* process the character */
	c = (c >> 1) | (c << 7);	/* rotate right once */

#ifdef KBDRESET
	if (c == 0x78) {
#ifdef DEBUG
		printf ("kbdintr: Reset Warning started\n");
#endif
		++reset_warn;
		return;
	}
#endif
	/* if not in event mode, deliver straight to ite to process key stroke */
	if (! k->k_event_mode) {
		ite_filter (c, ITEFILT_TTY);
		return;
	}

	/* Keyboard is generating events.  Turn this keystroke into an
	 * event and put it in the queue.  If the queue is full, the
	 * keystroke is lost (sorry!).
	 */
 
	put = k->k_events.ev_put;
	fe = &k->k_events.ev_q[put];
	put = (put + 1) % EV_QSIZE;
	if (put == k->k_events.ev_get) {
		log(LOG_WARNING, "keyboard event queue overflow\n"); /* ??? */
		return;
	}
	fe->id = KEY_CODE(c);
	fe->value = KEY_UP(c) ? VKEY_UP : VKEY_DOWN;
	fe->time = time;
	k->k_events.ev_put = put;
	EV_WAKEUP(&k->k_events);
}


int
kbdgetcn()
{
	int s = spltty ();
	u_char ints, mask, c, in;

	for (ints = 0; ! ((mask = ciaa.icr) & CIA_ICR_SP); ints |= mask) ;

	in = ciaa.sdr;
	c = ~in;

	/* ack */
	ciaa.cra |= (1 << 6);	/* serial line output */
	ciaa.sdr = 0xff;		/* ack */
	/* wait 200 microseconds */
	DELAY(2000);    /* XXXX only works as long as DELAY doesn't use a timer and waits.. */
	ciaa.cra &= ~(1 << 6);
	ciaa.sdr = in;

	splx (s);
	c = (c >> 1) | (c << 7);

	/* take care that no CIA-interrupts are lost */
	if (ints)
		dispatch_cia_ints (0, ints);

	return c;
}