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

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/* $NetBSD: kbd.c,v 1.5 1995/06/26 14:31:27 leo Exp $ */
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/*
* 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 <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/conf.h>
#include <sys/file.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <dev/cons.h>
#include <machine/cpu.h>
#include <machine/iomap.h>
#include <machine/mfp.h>
#include <machine/acia.h>
#include <machine/video.h>
#include <atari/dev/itevar.h>
#include <atari/dev/kbdreg.h>
#include <atari/dev/event_var.h>
#include <atari/dev/vuid_event.h>
#include "mouse.h"
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/*
* 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 256 /* Sz of input ring buffer, must be power of 2 */
#define KBD_RING_MASK 255 /* Modulo mask for above */
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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 */
u_char k_soft_cs; /* control-reg. copy */
u_char k_package[20]; /* XXX package being build */
u_char k_pkg_size; /* Size of the package */
u_char k_pkg_idx;
u_char *k_sendp; /* Output pointer */
int k_send_cnt; /* Chars left for output */
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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));
static void kbdattach __P((struct device *, struct device *, void *));
static int kbdmatch __P((struct device *, struct cfdata *, void *));
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static int kbd_write_poll __P((u_char *, int));
static void kbd_pkg_start __P((struct kbd_softc *, u_char));
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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);
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}
/*ARGSUSED*/
static void
kbdattach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
int timeout;
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u_char kbd_rst[] = { 0x80, 0x01 };
u_char kbd_icmd[] = { 0x12, 0x15 };
/*
* Disable keyboard interrupts from MFP
*/
MFP->mf_ierb &= ~IB_AINT;
/*
* Reset ACIA and intialize to:
* divide by 16, 8 data, 1 stop, no parity, enable RX interrupts
*/
KBD->ac_cs = A_RESET;
delay(100); /* XXX: enough? */
KBD->ac_cs = kbd_softc.k_soft_cs = KBD_INIT | A_RXINT;
/*
* Clear error conditions
*/
while (KBD->ac_cs & (A_IRQ|A_RXRDY))
timeout = KBD->ac_da;
/*
* Now send the reset string, and read+ignore it's response
*/
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if (!kbd_write_poll(kbd_rst, 2))
printf("kbd: error cannot reset keyboard\n");
for (timeout = 1000; timeout > 0; timeout--) {
if (KBD->ac_cs & (A_IRQ|A_RXRDY)) {
timeout = KBD->ac_da;
timeout = 100;
}
delay(100);
}
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/*
* Send init command: disable mice & joysticks
*/
kbd_write_poll(kbd_icmd, sizeof(kbd_icmd));
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printf("\n");
}
/* definitions for atari keyboard encoding. */
#define KEY_CODE(c) ((u_char)(c) & 0x7f)
#define KEY_UP(c) ((u_char)(c) & 0x80)
#define IS_KEY(c) ((u_char)(c) < 0xf6)
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void
kbdenable()
{
int s, code;
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s = spltty();
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/*
* Clear error conditions...
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*/
while (KBD->ac_cs & (A_IRQ|A_RXRDY))
code = KBD->ac_da;
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/*
* Enable interrupts from MFP
*/
MFP->mf_iprb &= ~IB_AINT;
MFP->mf_ierb |= IB_AINT;
MFP->mf_imrb |= IB_AINT;
kbd_softc.k_event_mode = 0;
kbd_softc.k_events.ev_io = 0;
kbd_softc.k_pkg_size = 0;
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splx(s);
}
int kbdopen(dev_t dev, int flags, int mode, struct proc *p)
{
int s, error;
if (kbd_softc.k_events.ev_io)
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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)
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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)
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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 at spl6.
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*/
int
kbdintr(sr)
int sr; /* sr at time of interrupt */
{
int code;
int got_char = 0;
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/*
* There may be multiple keys available. Read them all.
*/
while (KBD->ac_cs & (A_RXRDY|A_OE|A_PE)) {
got_char = 1;
if (KBD->ac_cs & (A_OE|A_PE)) {
code = KBD->ac_da; /* Silently ignore errors */
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continue;
}
kbd_ring[kbd_rbput++ & KBD_RING_MASK] = KBD->ac_da;
}
/*
* If characters are waiting for transmit, send them.
*/
if ((kbd_softc.k_soft_cs & A_TXINT) && (KBD->ac_cs & A_TXRDY)) {
if (kbd_softc.k_sendp != NULL)
KBD->ac_da = *kbd_softc.k_sendp++;
if (--kbd_softc.k_send_cnt <= 0) {
/*
* The total package has been transmitted,
* wakeup anyone waiting for it.
*/
KBD->ac_cs = (kbd_softc.k_soft_cs &= ~A_TXINT);
kbd_softc.k_sendp = NULL;
kbd_softc.k_send_cnt = 0;
wakeup((caddr_t)&kbd_softc.k_send_cnt);
}
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}
/*
* Activate software-level to handle possible input.
*/
if (got_char) {
if (!BASEPRI(sr)) {
if (!kbd_soft++)
add_sicallback(kbdsoft, 0, 0);
} else {
spl1();
kbdsoft();
}
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}
}
/*
* 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 (;;) {
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n = kbd_rbput;
if (get == n) /* We're done */
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break;
n -= get;
if (n > KBD_RING_SIZE) { /* Ring buffer overflow */
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get += n - KBD_RING_SIZE;
n = KBD_RING_SIZE;
}
while (--n >= 0) {
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code = kbd_ring[get++ & KBD_RING_MASK];
/*
* If collecting a package, stuff it in and
* continue.
*/
if (k->k_pkg_size && (k->k_pkg_idx < k->k_pkg_size)) {
k->k_package[k->k_pkg_idx++] = code;
if (k->k_pkg_idx == k->k_pkg_size) {
k->k_pkg_size = 0;
#if NMOUSE > 0
/*
* Package is complete, we can now
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* send it to the mouse driver...
*/
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mouse_soft(k->k_package, k->k_pkg_size);
#endif /* NMOUSE */
}
continue;
}
/*
* If this is a package header, init pkg. handling.
*/
if (!IS_KEY(code)) {
kbd_pkg_start(k, code);
continue;
}
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/*
* if not in event mode, deliver straight to ite to
* process key stroke
*/
if (!k->k_event_mode) {
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/* 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) {
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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);
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}
int
kbdgetcn()
{
u_char code;
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int s = spltty();
int ints_active;
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ints_active = 0;
if (MFP->mf_imrb & IB_AINT) {
ints_active = 1;
MFP->mf_imrb &= ~IB_AINT;
}
for (;;) {
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while (!((KBD->ac_cs & (A_IRQ|A_RXRDY)) == (A_IRQ|A_RXRDY)))
; /* Wait for key */
if (KBD->ac_cs & (A_OE|A_PE)) {
code = KBD->ac_da; /* Silently ignore errors */
continue;
}
break;
}
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code = KBD->ac_da;
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if (ints_active) {
MFP->mf_iprb &= ~IB_AINT;
MFP->mf_imrb |= IB_AINT;
}
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splx (s);
return code;
}
/*
* Write a command to the keyboard in 'polled' mode.
*/
static int
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kbd_write_poll(cmd, len)
u_char *cmd;
int len;
{
int timeout;
while (len-- > 0) {
KBD->ac_da = *cmd++;
for (timeout = 100; !(KBD->ac_cs & A_TXRDY); timeout--)
delay(10);
if (!(KBD->ac_cs & A_TXRDY))
return (0);
}
return (1);
}
/*
* Write a command to the keyboard. Return when command is send.
*/
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void
kbd_write(cmd, len)
u_char *cmd;
int len;
{
struct kbd_softc *k = &kbd_softc;
int sps;
/*
* Get to splhigh, 'real' interrupts arrive at spl6!
*/
sps = splhigh();
/*
* Make sure any privious write has ended...
*/
while (k->k_sendp != NULL)
tsleep((caddr_t)&k->k_sendp, TTOPRI, "kbd_write1", 0);
/*
* If the KBD-acia is not currently busy, send the first
* character now.
*/
KBD->ac_cs = (k->k_soft_cs |= A_TXINT);
if (KBD->ac_cs & A_TXRDY) {
KBD->ac_da = *cmd++;
len--;
}
/*
* If we're not yet done, wait until all characters are send.
*/
if (len > 0) {
k->k_sendp = cmd;
k->k_send_cnt = len;
tsleep((caddr_t)&k->k_send_cnt, TTOPRI, "kbd_write2", 0);
}
splx(sps);
/*
* Wakeup all procs waiting for us.
*/
wakeup((caddr_t)&k->k_sendp);
}
/*
* Setup softc-fields to assemble a keyboard package.
*/
static void
kbd_pkg_start(kp, msg_start)
struct kbd_softc *kp;
u_char msg_start;
{
kp->k_pkg_idx = 1;
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;
}
}