/* $NetBSD: kbd.c,v 1.2 1995/04/10 08:54:41 mycroft Exp $ */ /* * Copyright (c) 1995 Leo Weppelman * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * The ringbuffer is the interface between the hard and soft interrupt handler. * The hard interrupt runs straight from the MFP interrupt. */ #define KBD_RING_SIZE 16 /* Size of the ring buffer, must be power of 2 */ #define KBD_RING_MASK 15 /* Modulo mask for above */ static u_char kbd_ring[KBD_RING_SIZE]; static volatile u_int kbd_rbput = 0; /* 'put' index */ static u_int kbd_rbget = 0; /* 'get' index */ static u_char kbd_soft = 0; /* 1: Softint has been scheduled*/ struct kbd_softc { int k_event_mode; /* if 1, collect events, */ /* else pass to ite */ struct evvar k_events; /* event queue state */ }; static struct kbd_softc kbd_softc; static void kbdsoft __P((void)); static void kbdattach __P((struct device *, struct device *, void *)); static int kbdmatch __P((struct device *, struct cfdata *, void *)); struct cfdriver kbdcd = { NULL, "kbd", (cfmatch_t)kbdmatch, kbdattach, DV_DULL, sizeof(struct device), NULL, 0 }; /*ARGSUSED*/ static int kbdmatch(pdp, cfp, auxp) struct device *pdp; struct cfdata *cfp; void *auxp; { if(!strcmp((char *)auxp, "kbd")) return(1); return(0); } /*ARGSUSED*/ static void kbdattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { printf("\n"); } /* definitions for atari keyboard encoding. */ #define KEY_CODE(c) ((c) & 0x7f) #define KEY_UP(c) ((c) & 0x80) void kbdenable() { int s, code; s = spltty(); /* * Initialize ACIA port */ code = KBD->ac_da; /* Clear error conditions */ /* divide by 16, 8 data, 1 stop, no parity, enable interrupts */ KBD->ac_cs = KBD_INIT | A_RXINT; #if 0 /* XXX Turn off mouse??? */ KBD->ac_da = 0x12; #endif /* * Enable interrupts from MFP */ MFP->mf_iprb &= ~IB_AINT; MFP->mf_ierb |= IB_AINT; MFP->mf_imrb |= IB_AINT; code = KBD->ac_da; /* Clear error conditions */ kbd_softc.k_event_mode = 0; kbd_softc.k_events.ev_io = 0; splx(s); } int kbdopen(dev_t dev, int flags, int mode, struct proc *p) { int s, error; 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_t dev, int flags, int 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_t dev, struct uio *uio, int flags) { return ev_read(&kbd_softc.k_events, uio, flags); } int kbdioctl(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_t dev, int rw, struct proc *p) { return ev_select (&kbd_softc.k_events, rw, p); } /* * Keyboard interrupt handler called straight from MFP. */ int kbdintr(sr) int sr; /* sr at time of interrupt */ { int code; /* * There may be multiple keys available. Read them all. */ while(KBD->ac_cs & (A_IRQ|A_RXRDY)) { if(KBD->ac_cs & (A_OE|A_PE)) { code = KBD->ac_da; /* Silently ignore overruns */ continue; } kbd_ring[kbd_rbput++ & KBD_RING_MASK] = KBD->ac_da; } if(!BASEPRI(sr)) { if(!kbd_soft++) add_sicallback(kbdsoft, 0, 0); } else { spl1(); kbdsoft(); } } /* * Keyboard soft interrupt handler */ void kbdsoft() { int s; u_char code; struct kbd_softc *k = &kbd_softc; struct firm_event *fe; int put; int n, get; kbd_soft = 0; get = kbd_rbget; for(;;) { n = kbd_rbput; if(get == n) /* We're done */ break; n -= get; if(n > KBD_RING_SIZE) { /* Ring buffer overflow */ get += n - KBD_RING_SIZE; n = KBD_RING_SIZE; } while(--n >= 0) { code = kbd_ring[get++ & KBD_RING_MASK]; /* * if not in event mode, deliver straight to ite to * process key stroke */ if(!k->k_event_mode) { /* Gets to spltty() by itself */ ite_filter(code, ITEFILT_TTY); continue; } /* * 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!). */ s = spltty(); 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"); splx(s); continue; } fe->id = KEY_CODE(code); fe->value = KEY_UP(code) ? VKEY_UP : VKEY_DOWN; fe->time = time; k->k_events.ev_put = put; EV_WAKEUP(&k->k_events); splx(s); } kbd_rbget = get; } } static char sound[] = { 0xA8,0x01,0xA9,0x01,0xAA,0x01,0x00, 0xF8,0x10,0x10,0x10,0x00,0x20,0x03 }; int kbdbell() { register int i, sps; sps = spltty(); for(i = 0; i < sizeof(sound); i++) { SOUND->sd_selr = i; SOUND->sd_wdat = sound[i]; } splx(sps); } int kbdgetcn() { u_char code; int s = spltty(); MFP->mf_imrb &= ~IB_AINT; while(!(KBD->ac_cs & A_IRQ)) ; /* Wait for key */ MFP->mf_iprb &= ~IB_AINT; MFP->mf_imrb |= IB_AINT; code = KBD->ac_da; splx (s); return code; }