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NetBSD/sys/dev/tc/zskbd.c

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/* $NetBSD: zskbd.c,v 1.1 2000/07/05 02:48:50 nisimura Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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, Lawrence Berkeley Laboratory.
*
* 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 8.2 (Berkeley) 10/30/93
*/
/*
* LK200/LK400 keyboard attached with channel A of the 2nd SCC
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/malloc.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wskbdvar.h>
#include <dev/wscons/wsksymdef.h>
#include <dev/wscons/wsksymvar.h>
#include <dev/dec/wskbdmap_lk201.h>
#include <dev/ic/z8530reg.h>
#include <machine/z8530var.h>
#include <dev/tc/tcvar.h>
#include <dev/tc/zs_ioasicvar.h>
#include <dev/dec/lk201reg.h>
#include <dev/dec/lk201var.h>
#include "locators.h"
/*
* How many input characters we can buffer.
* The port-specific var.h may override this.
* Note: must be a power of two!
*/
#define ZSKBD_RX_RING_SIZE 256
#define ZSKBD_RX_RING_MASK (ZSKBD_RX_RING_SIZE-1)
/*
* Output buffer. Only need a few chars.
*/
#define ZSKBD_TX_RING_SIZE 16
#define ZSKBD_TX_RING_MASK (ZSKBD_TX_RING_SIZE-1)
#define ZSKBD_BPS 4800
struct zskbd_internal {
struct zs_chanstate *zsi_cs;
struct lk201_state zsi_ks;
};
struct zskbd_internal zskbd_console_internal;
struct zskbd_softc {
struct device zskbd_dev; /* required first: base device */
struct zskbd_internal *sc_itl;
/* Flags to communicate with zskbd_softintr() */
volatile int zskbd_intr_flags;
#define INTR_RX_OVERRUN 1
#define INTR_TX_EMPTY 2
#define INTR_ST_CHECK 4
/*
* The receive ring buffer.
*/
u_int zskbd_rbget; /* ring buffer `get' index */
volatile u_int zskbd_rbput; /* ring buffer `put' index */
u_short zskbd_rbuf[ZSKBD_RX_RING_SIZE]; /* rr1, data pairs */
int sc_enabled;
int kbd_type;
struct device *sc_wskbddev;
};
struct zsops zsops_zskbd;
static void zskbd_input __P((struct zskbd_softc *, int));
static int zskbd_match __P((struct device *, struct cfdata *, void *));
static void zskbd_attach __P((struct device *, struct device *, void *));
struct cfattach zskbd_ca = {
sizeof(struct zskbd_softc), zskbd_match, zskbd_attach,
};
static int zskbd_enable __P((void *, int));
static void zskbd_set_leds __P((void *, int));
static int zskbd_ioctl __P((void *, u_long, caddr_t, int, struct proc *));
const struct wskbd_accessops zskbd_accessops = {
zskbd_enable,
zskbd_set_leds,
zskbd_ioctl,
};
static void zskbd_cngetc(void *, u_int *, int *);
static void zskbd_cnpollc(void *, int);
const struct wskbd_consops zskbd_consops = {
zskbd_cngetc,
zskbd_cnpollc,
};
static int zskbd_sendchar __P((void *, u_char));
const struct wskbd_mapdata zskbd_keymapdata = {
zskbd_keydesctab,
#ifdef ZSKBD_LAYOUT
ZSKBD_LAYOUT,
#else
KB_US | KB_LK401,
#endif
};
int zskbd_cnattach __P((struct zs_chanstate *)); /* EXPORTED */
/*
* kbd_match: how is this zs channel configured?
*/
static int
zskbd_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct zsc_attach_args *args = aux;
/* Exact match is better than wildcard. */
if (cf->cf_loc[ZSCCF_CHANNEL] == args->channel)
return 2;
/* This driver accepts wildcard. */
if (cf->cf_loc[ZSCCF_CHANNEL] == ZSCCF_CHANNEL_DEFAULT)
return 1;
return 0;
}
static void
zskbd_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct zsc_softc *zsc = (void *)parent;
struct zskbd_softc *zskbd = (void *)self;
struct zsc_attach_args *args = aux;
struct zs_chanstate *cs;
struct zskbd_internal *zsi;
struct wskbddev_attach_args a;
int s, isconsole;
cs = zsc->zsc_cs[args->channel];
cs->cs_private = zskbd;
cs->cs_ops = &zsops_zskbd;
isconsole = (args->hwflags & ZS_HWFLAG_CONSOLE);
if (isconsole) {
zsi = &zskbd_console_internal;
} else {
zsi = malloc(sizeof(struct zskbd_internal),
M_DEVBUF, M_NOWAIT);
zsi->zsi_ks.attmt.sendchar = zskbd_sendchar;
zsi->zsi_ks.attmt.cookie = cs;
zsi->zsi_cs = cs;
}
zskbd->sc_itl = zsi;
printf("\n");
/* Initialize the speed, etc. */
s = splzs();
/* May need reset... */
zs_write_reg(cs, 9, ZSWR9_A_RESET);
/* These are OK as set by zscc: WR3, WR4, WR5 */
/* We don't care about status or tx interrupts. */
cs->cs_preg[1] = ZSWR1_RIE;
(void) zs_set_speed(cs, ZSKBD_BPS);
zs_loadchannelregs(cs);
splx(s);
if (!isconsole)
lk201_init(&zsi->zsi_ks);
/* XXX should identify keyboard ID here XXX */
/* XXX layout and the number of LED is varying XXX */
zskbd->kbd_type = WSKBD_TYPE_LK201;
zskbd->sc_enabled = 1;
a.console = isconsole;
a.keymap = &zskbd_keymapdata;
a.accessops = &zskbd_accessops;
a.accesscookie = zskbd;
zskbd->sc_wskbddev = config_found(self, &a, wskbddevprint);
}
int
zskbd_cnattach(cs)
struct zs_chanstate *cs;
{
(void) zs_set_speed(cs, ZSKBD_BPS);
zs_loadchannelregs(cs);
zskbd_console_internal.zsi_ks.attmt.sendchar = zskbd_sendchar;
zskbd_console_internal.zsi_ks.attmt.cookie = cs;
lk201_init(&zskbd_console_internal.zsi_ks);
zskbd_console_internal.zsi_cs = cs;
wskbd_cnattach(&zskbd_consops, &zskbd_console_internal,
&zskbd_keymapdata);
return 0;
}
static int
zskbd_enable(v, on)
void *v;
int on;
{
struct zskbd_softc *sc = v;
sc->sc_enabled = on;
return 0;
}
static int
zskbd_sendchar(v, c)
void *v;
u_char c;
{
struct zs_chanstate *cs = v;
zs_write_data(cs, c);
DELAY(4000);
return (0);
}
static void
zskbd_cngetc(v, type, data)
void *v;
u_int *type;
int *data;
{
struct zskbd_internal *zsi = v;
int c;
do {
c = zs_getc(zsi->zsi_cs);
} while (!lk201_decode(&zsi->zsi_ks, c, type, data));
}
static void
zskbd_cnpollc(v, on)
void *v;
int on;
{
#if 0
struct zskbd_internal *zsi = v;
#endif
}
static void
zskbd_set_leds(v, leds)
void *v;
int leds;
{
struct zskbd_softc *sc = (struct zskbd_softc *)v;
lk201_set_leds(&sc->sc_itl->zsi_ks, leds);
}
static int
zskbd_ioctl(v, cmd, data, flag, p)
void *v;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct zskbd_softc *sc = (struct zskbd_softc *)v;
switch (cmd) {
case WSKBDIO_GTYPE:
*(int *)data = sc->kbd_type;
return 0;
case WSKBDIO_SETLEDS:
lk201_set_leds(&sc->sc_itl->zsi_ks, *(int *)data);
return 0;
case WSKBDIO_GETLEDS:
/* XXX don't dig in kbd internals */
*(int *)data = sc->sc_itl->zsi_ks.leds_state;
return 0;
case WSKBDIO_COMPLEXBELL:
lk201_bell(&sc->sc_itl->zsi_ks,
(struct wskbd_bell_data *)data);
return 0;
}
return -1;
}
static void
zskbd_input(sc, data)
struct zskbd_softc *sc;
int data;
{
u_int type;
int val;
if (sc->sc_enabled == 0)
return;
if (lk201_decode(&sc->sc_itl->zsi_ks, data, &type, &val))
wskbd_input(sc->sc_wskbddev, type, val);
}
/****************************************************************
* Interface to the lower layer (zscc)
****************************************************************/
static void zskbd_rxint __P((struct zs_chanstate *));
static void zskbd_stint __P((struct zs_chanstate *, int));
static void zskbd_txint __P((struct zs_chanstate *));
static void zskbd_softint __P((struct zs_chanstate *));
static void
zskbd_rxint(cs)
struct zs_chanstate *cs;
{
struct zskbd_softc *zskbd;
int put, put_next;
u_char c, rr1;
zskbd = cs->cs_private;
put = zskbd->zskbd_rbput;
/*
* First read the status, because reading the received char
* destroys the status of this char.
*/
rr1 = zs_read_reg(cs, 1);
c = zs_read_data(cs);
if (rr1 & (ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) {
/* Clear the receive error. */
zs_write_csr(cs, ZSWR0_RESET_ERRORS);
}
zskbd->zskbd_rbuf[put] = (c << 8) | rr1;
put_next = (put + 1) & ZSKBD_RX_RING_MASK;
/* Would overrun if increment makes (put==get). */
if (put_next == zskbd->zskbd_rbget) {
zskbd->zskbd_intr_flags |= INTR_RX_OVERRUN;
} else {
/* OK, really increment. */
put = put_next;
}
/* Done reading. */
zskbd->zskbd_rbput = put;
/* Ask for softint() call. */
cs->cs_softreq = 1;
}
static void
zskbd_txint(cs)
struct zs_chanstate *cs;
{
struct zskbd_softc *zskbd;
zskbd = cs->cs_private;
zs_write_csr(cs, ZSWR0_RESET_TXINT);
zskbd->zskbd_intr_flags |= INTR_TX_EMPTY;
/* Ask for softint() call. */
cs->cs_softreq = 1;
}
static void
zskbd_stint(cs, force)
struct zs_chanstate *cs;
int force;
{
struct zskbd_softc *zskbd;
int rr0;
zskbd = cs->cs_private;
rr0 = zs_read_csr(cs);
zs_write_csr(cs, ZSWR0_RESET_STATUS);
/*
* We have to accumulate status line changes here.
* Otherwise, if we get multiple status interrupts
* before the softint runs, we could fail to notice
* some status line changes in the softint routine.
* Fix from Bill Studenmund, October 1996.
*/
cs->cs_rr0_delta |= (cs->cs_rr0 ^ rr0);
cs->cs_rr0 = rr0;
zskbd->zskbd_intr_flags |= INTR_ST_CHECK;
/* Ask for softint() call. */
cs->cs_softreq = 1;
}
static void
zskbd_softint(cs)
struct zs_chanstate *cs;
{
struct zskbd_softc *zskbd;
int get, c, s;
int intr_flags;
u_short ring_data;
zskbd = cs->cs_private;
/* Atomically get and clear flags. */
s = splzs();
intr_flags = zskbd->zskbd_intr_flags;
zskbd->zskbd_intr_flags = 0;
/* Now lower to spltty for the rest. */
(void) spltty();
/*
* Copy data from the receive ring to the event layer.
*/
get = zskbd->zskbd_rbget;
while (get != zskbd->zskbd_rbput) {
ring_data = zskbd->zskbd_rbuf[get];
get = (get + 1) & ZSKBD_RX_RING_MASK;
/* low byte of ring_data is rr1 */
c = (ring_data >> 8) & 0xff;
if (ring_data & ZSRR1_DO)
intr_flags |= INTR_RX_OVERRUN;
if (ring_data & (ZSRR1_FE | ZSRR1_PE)) {
#if 0 /* XXX */
log(LOG_ERR, "%s: input error (0x%x)\n",
zskbd->zskbd_dev.dv_xname, ring_data);
c = -1; /* signal input error */
#endif
}
/* Pass this up to the "middle" layer. */
zskbd_input(zskbd, c);
}
if (intr_flags & INTR_RX_OVERRUN) {
#if 0 /* XXX */
log(LOG_ERR, "%s: input overrun\n",
zskbd->zskbd_dev.dv_xname);
#endif
}
zskbd->zskbd_rbget = get;
if (intr_flags & INTR_TX_EMPTY) {
/*
* Transmit done. (Not expected.)
*/
#if 0
log(LOG_ERR, "%s: transmit interrupt?\n",
zskbd->zskbd_dev.dv_xname);
#endif
}
if (intr_flags & INTR_ST_CHECK) {
/*
* Status line change. (Not expected.)
*/
log(LOG_ERR, "%s: status interrupt?\n",
zskbd->zskbd_dev.dv_xname);
cs->cs_rr0_delta = 0;
}
splx(s);
}
struct zsops zsops_zskbd = {
zskbd_rxint, /* receive char available */
zskbd_stint, /* external/status */
zskbd_txint, /* xmit buffer empty */
zskbd_softint, /* process software interrupt */
};
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