564 lines
12 KiB
C
564 lines
12 KiB
C
/* $NetBSD: kbd.c,v 1.5 1995/06/26 14:31:27 leo Exp $ */
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/*
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* Copyright (c) 1995 Leo Weppelman
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* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
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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 without
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* modification, are permitted provided that the following conditions
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* 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 copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/kernel.h>
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#include <sys/syslog.h>
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#include <dev/cons.h>
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#include <machine/cpu.h>
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#include <machine/iomap.h>
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#include <machine/mfp.h>
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#include <machine/acia.h>
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#include <machine/video.h>
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#include <atari/dev/itevar.h>
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#include <atari/dev/kbdreg.h>
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#include <atari/dev/event_var.h>
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#include <atari/dev/vuid_event.h>
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#include "mouse.h"
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/*
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* The ringbuffer is the interface between the hard and soft interrupt handler.
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* The hard interrupt runs straight from the MFP interrupt.
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*/
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#define KBD_RING_SIZE 256 /* Sz of input ring buffer, must be power of 2 */
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#define KBD_RING_MASK 255 /* Modulo mask for above */
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static u_char kbd_ring[KBD_RING_SIZE];
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static volatile u_int kbd_rbput = 0; /* 'put' index */
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static u_int kbd_rbget = 0; /* 'get' index */
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static u_char kbd_soft = 0; /* 1: Softint has been scheduled*/
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struct kbd_softc {
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int k_event_mode; /* if 1, collect events, */
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/* else pass to ite */
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struct evvar k_events; /* event queue state */
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u_char k_soft_cs; /* control-reg. copy */
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u_char k_package[20]; /* XXX package being build */
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u_char k_pkg_size; /* Size of the package */
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u_char k_pkg_idx;
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u_char *k_sendp; /* Output pointer */
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int k_send_cnt; /* Chars left for output */
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};
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static struct kbd_softc kbd_softc;
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void kbd_write __P((u_char *, int));
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static void kbdsoft __P((void));
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static void kbdattach __P((struct device *, struct device *, void *));
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static int kbdmatch __P((struct device *, struct cfdata *, void *));
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static int kbd_write_poll __P((u_char *, int));
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static void kbd_pkg_start __P((struct kbd_softc *, u_char));
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struct cfdriver kbdcd = {
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NULL, "kbd", (cfmatch_t)kbdmatch, kbdattach,
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DV_DULL, sizeof(struct device), NULL, 0 };
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/*ARGSUSED*/
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static int
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kbdmatch(pdp, cfp, auxp)
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struct device *pdp;
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struct cfdata *cfp;
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void *auxp;
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{
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if (!strcmp((char *)auxp, "kbd"))
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return (1);
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return (0);
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}
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/*ARGSUSED*/
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static void
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kbdattach(pdp, dp, auxp)
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struct device *pdp, *dp;
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void *auxp;
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{
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int timeout;
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u_char kbd_rst[] = { 0x80, 0x01 };
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u_char kbd_icmd[] = { 0x12, 0x15 };
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/*
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* Disable keyboard interrupts from MFP
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*/
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MFP->mf_ierb &= ~IB_AINT;
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/*
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* Reset ACIA and intialize to:
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* divide by 16, 8 data, 1 stop, no parity, enable RX interrupts
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*/
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KBD->ac_cs = A_RESET;
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delay(100); /* XXX: enough? */
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KBD->ac_cs = kbd_softc.k_soft_cs = KBD_INIT | A_RXINT;
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/*
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* Clear error conditions
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*/
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while (KBD->ac_cs & (A_IRQ|A_RXRDY))
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timeout = KBD->ac_da;
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/*
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* Now send the reset string, and read+ignore it's response
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*/
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if (!kbd_write_poll(kbd_rst, 2))
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printf("kbd: error cannot reset keyboard\n");
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for (timeout = 1000; timeout > 0; timeout--) {
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if (KBD->ac_cs & (A_IRQ|A_RXRDY)) {
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timeout = KBD->ac_da;
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timeout = 100;
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}
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delay(100);
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}
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/*
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* Send init command: disable mice & joysticks
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*/
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kbd_write_poll(kbd_icmd, sizeof(kbd_icmd));
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printf("\n");
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}
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/* definitions for atari keyboard encoding. */
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#define KEY_CODE(c) ((u_char)(c) & 0x7f)
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#define KEY_UP(c) ((u_char)(c) & 0x80)
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#define IS_KEY(c) ((u_char)(c) < 0xf6)
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void
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kbdenable()
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{
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int s, code;
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s = spltty();
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/*
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* Clear error conditions...
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*/
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while (KBD->ac_cs & (A_IRQ|A_RXRDY))
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code = KBD->ac_da;
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/*
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* Enable interrupts from MFP
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*/
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MFP->mf_iprb &= ~IB_AINT;
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MFP->mf_ierb |= IB_AINT;
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MFP->mf_imrb |= IB_AINT;
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kbd_softc.k_event_mode = 0;
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kbd_softc.k_events.ev_io = 0;
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kbd_softc.k_pkg_size = 0;
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splx(s);
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}
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int kbdopen(dev_t dev, int flags, int mode, struct proc *p)
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{
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int s, error;
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if (kbd_softc.k_events.ev_io)
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return EBUSY;
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kbd_softc.k_events.ev_io = p;
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ev_init(&kbd_softc.k_events);
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return (0);
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}
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int
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kbdclose(dev_t dev, int flags, int mode, struct proc *p)
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{
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/* Turn off event mode, dump the queue */
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kbd_softc.k_event_mode = 0;
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ev_fini(&kbd_softc.k_events);
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kbd_softc.k_events.ev_io = NULL;
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return (0);
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}
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int
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kbdread(dev_t dev, struct uio *uio, int flags)
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{
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return ev_read(&kbd_softc.k_events, uio, flags);
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}
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int
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kbdioctl(dev_t dev,u_long cmd,register caddr_t data,int flag,struct proc *p)
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{
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register struct kbd_softc *k = &kbd_softc;
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switch (cmd) {
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case KIOCTRANS:
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if (*(int *)data == TR_UNTRANS_EVENT)
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return 0;
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break;
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case KIOCGTRANS:
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/*
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* Get translation mode
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*/
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*(int *)data = TR_UNTRANS_EVENT;
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return 0;
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case KIOCSDIRECT:
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k->k_event_mode = *(int *)data;
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return 0;
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case FIONBIO: /* we will remove this someday (soon???) */
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return 0;
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case FIOASYNC:
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k->k_events.ev_async = *(int *)data != 0;
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return 0;
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case TIOCSPGRP:
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if (*(int *)data != k->k_events.ev_io->p_pgid)
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return EPERM;
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return 0;
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default:
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return ENOTTY;
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}
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/*
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* We identified the ioctl, but we do not handle it.
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*/
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return EOPNOTSUPP; /* misuse, but what the heck */
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}
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int
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kbdselect (dev_t dev, int rw, struct proc *p)
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{
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return ev_select (&kbd_softc.k_events, rw, p);
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}
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/*
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* Keyboard interrupt handler called straight from MFP at spl6.
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*/
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int
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kbdintr(sr)
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int sr; /* sr at time of interrupt */
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{
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int code;
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int got_char = 0;
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/*
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* There may be multiple keys available. Read them all.
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*/
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while (KBD->ac_cs & (A_RXRDY|A_OE|A_PE)) {
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got_char = 1;
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if (KBD->ac_cs & (A_OE|A_PE)) {
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code = KBD->ac_da; /* Silently ignore errors */
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continue;
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}
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kbd_ring[kbd_rbput++ & KBD_RING_MASK] = KBD->ac_da;
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}
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/*
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* If characters are waiting for transmit, send them.
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*/
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if ((kbd_softc.k_soft_cs & A_TXINT) && (KBD->ac_cs & A_TXRDY)) {
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if (kbd_softc.k_sendp != NULL)
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KBD->ac_da = *kbd_softc.k_sendp++;
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if (--kbd_softc.k_send_cnt <= 0) {
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/*
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* The total package has been transmitted,
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* wakeup anyone waiting for it.
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*/
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KBD->ac_cs = (kbd_softc.k_soft_cs &= ~A_TXINT);
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kbd_softc.k_sendp = NULL;
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kbd_softc.k_send_cnt = 0;
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wakeup((caddr_t)&kbd_softc.k_send_cnt);
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}
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}
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/*
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* Activate software-level to handle possible input.
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*/
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if (got_char) {
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if (!BASEPRI(sr)) {
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if (!kbd_soft++)
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add_sicallback(kbdsoft, 0, 0);
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} else {
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spl1();
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kbdsoft();
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}
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}
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}
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/*
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* Keyboard soft interrupt handler
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*/
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void
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kbdsoft()
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{
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int s;
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u_char code;
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struct kbd_softc *k = &kbd_softc;
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struct firm_event *fe;
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int put;
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int n, get;
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kbd_soft = 0;
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get = kbd_rbget;
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for (;;) {
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n = kbd_rbput;
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if (get == n) /* We're done */
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break;
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n -= get;
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if (n > KBD_RING_SIZE) { /* Ring buffer overflow */
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get += n - KBD_RING_SIZE;
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n = KBD_RING_SIZE;
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}
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while (--n >= 0) {
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code = kbd_ring[get++ & KBD_RING_MASK];
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/*
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* If collecting a package, stuff it in and
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* continue.
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*/
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if (k->k_pkg_size && (k->k_pkg_idx < k->k_pkg_size)) {
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k->k_package[k->k_pkg_idx++] = code;
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if (k->k_pkg_idx == k->k_pkg_size) {
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k->k_pkg_size = 0;
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#if NMOUSE > 0
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/*
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* Package is complete, we can now
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* send it to the mouse driver...
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*/
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mouse_soft(k->k_package, k->k_pkg_size);
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#endif /* NMOUSE */
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}
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continue;
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}
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/*
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* If this is a package header, init pkg. handling.
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*/
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if (!IS_KEY(code)) {
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kbd_pkg_start(k, code);
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continue;
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}
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/*
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* if not in event mode, deliver straight to ite to
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* process key stroke
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*/
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if (!k->k_event_mode) {
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/* Gets to spltty() by itself */
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ite_filter(code, ITEFILT_TTY);
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continue;
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}
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/*
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* Keyboard is generating events. Turn this keystroke
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* into an event and put it in the queue. If the queue
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* is full, the keystroke is lost (sorry!).
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*/
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s = spltty();
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put = k->k_events.ev_put;
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fe = &k->k_events.ev_q[put];
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put = (put + 1) % EV_QSIZE;
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if (put == k->k_events.ev_get) {
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log(LOG_WARNING,
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"keyboard event queue overflow\n");
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splx(s);
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continue;
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}
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fe->id = KEY_CODE(code);
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fe->value = KEY_UP(code) ? VKEY_UP : VKEY_DOWN;
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fe->time = time;
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k->k_events.ev_put = put;
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EV_WAKEUP(&k->k_events);
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splx(s);
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}
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kbd_rbget = get;
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}
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}
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static char sound[] = {
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0xA8,0x01,0xA9,0x01,0xAA,0x01,0x00,
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0xF8,0x10,0x10,0x10,0x00,0x20,0x03
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};
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int
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kbdbell()
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{
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register int i, sps;
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sps = spltty();
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for (i = 0; i < sizeof(sound); i++) {
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SOUND->sd_selr = i;
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SOUND->sd_wdat = sound[i];
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}
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splx(sps);
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}
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int
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kbdgetcn()
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{
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u_char code;
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int s = spltty();
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int ints_active;
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ints_active = 0;
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if (MFP->mf_imrb & IB_AINT) {
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ints_active = 1;
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MFP->mf_imrb &= ~IB_AINT;
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}
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for (;;) {
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while (!((KBD->ac_cs & (A_IRQ|A_RXRDY)) == (A_IRQ|A_RXRDY)))
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; /* Wait for key */
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if (KBD->ac_cs & (A_OE|A_PE)) {
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code = KBD->ac_da; /* Silently ignore errors */
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continue;
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}
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break;
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}
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code = KBD->ac_da;
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if (ints_active) {
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MFP->mf_iprb &= ~IB_AINT;
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MFP->mf_imrb |= IB_AINT;
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}
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splx (s);
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return code;
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}
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/*
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* Write a command to the keyboard in 'polled' mode.
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*/
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static int
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kbd_write_poll(cmd, len)
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u_char *cmd;
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int len;
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{
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int timeout;
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while (len-- > 0) {
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KBD->ac_da = *cmd++;
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for (timeout = 100; !(KBD->ac_cs & A_TXRDY); timeout--)
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delay(10);
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if (!(KBD->ac_cs & A_TXRDY))
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return (0);
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}
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return (1);
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}
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/*
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* Write a command to the keyboard. Return when command is send.
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*/
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void
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kbd_write(cmd, len)
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u_char *cmd;
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int len;
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{
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struct kbd_softc *k = &kbd_softc;
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int sps;
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/*
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* Get to splhigh, 'real' interrupts arrive at spl6!
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*/
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sps = splhigh();
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/*
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* Make sure any privious write has ended...
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*/
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while (k->k_sendp != NULL)
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tsleep((caddr_t)&k->k_sendp, TTOPRI, "kbd_write1", 0);
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/*
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* If the KBD-acia is not currently busy, send the first
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* character now.
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*/
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KBD->ac_cs = (k->k_soft_cs |= A_TXINT);
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if (KBD->ac_cs & A_TXRDY) {
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KBD->ac_da = *cmd++;
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len--;
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}
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/*
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* If we're not yet done, wait until all characters are send.
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*/
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if (len > 0) {
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k->k_sendp = cmd;
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k->k_send_cnt = len;
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tsleep((caddr_t)&k->k_send_cnt, TTOPRI, "kbd_write2", 0);
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}
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splx(sps);
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/*
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* Wakeup all procs waiting for us.
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*/
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wakeup((caddr_t)&k->k_sendp);
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}
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/*
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* Setup softc-fields to assemble a keyboard package.
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*/
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static void
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kbd_pkg_start(kp, msg_start)
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struct kbd_softc *kp;
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u_char msg_start;
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{
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kp->k_pkg_idx = 1;
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kp->k_package[0] = msg_start;
|
|
switch (msg_start) {
|
|
case 0xf6:
|
|
kp->k_pkg_size = 8;
|
|
break;
|
|
case 0xf7:
|
|
kp->k_pkg_size = 6;
|
|
break;
|
|
case 0xf8:
|
|
case 0xf9:
|
|
case 0xfa:
|
|
case 0xfb:
|
|
kp->k_pkg_size = 3;
|
|
break;
|
|
case 0xfc:
|
|
kp->k_pkg_size = 7;
|
|
break;
|
|
case 0xfe:
|
|
case 0xff:
|
|
kp->k_pkg_size = 2;
|
|
break;
|
|
default:
|
|
printf("kbd: Unknown packet 0x%x\n", msg_start);
|
|
break;
|
|
}
|
|
}
|