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NetBSD/sys/dev/sun/kbd.c

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/* $NetBSD: kbd.c,v 1.15 1997/10/03 23:04:46 gwr 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
*/
/*
* Keyboard driver (/dev/kbd -- note that we do not have minor numbers
* [yet?]). Translates incoming bytes to ASCII or to `firm_events' and
* passes them up to the appropriate reader.
*/
/*
* Zilog Z8530 Dual UART driver (keyboard interface)
*
* This is the "slave" driver that will be attached to
* the "zsc" driver for a Sun keyboard.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/time.h>
#include <sys/syslog.h>
#include <sys/select.h>
#include <sys/poll.h>
#include <dev/ic/z8530reg.h>
#include <machine/z8530var.h>
#include <machine/vuid_event.h>
#include <machine/kbd.h>
#include <machine/kbio.h>
#include "event_var.h"
#include "kbd_xlate.h"
#include "locators.h"
/*
* Ideas:
* /dev/kbd is not a tty (plain device)
*/
/*
* How many input characters we can buffer.
* The port-specific var.h may override this.
* Note: must be a power of two!
*/
#define KBD_RX_RING_SIZE 256
#define KBD_RX_RING_MASK (KBD_RX_RING_SIZE-1)
/*
* Output buffer. Only need a few chars.
*/
#define KBD_TX_RING_SIZE 16
#define KBD_TX_RING_MASK (KBD_TX_RING_SIZE-1)
/*
* Keyboard serial line speed is fixed at 1200 bps.
*/
#define KBD_BPS 1200
#define KBD_RESET_TIMO 1000 /* mS. */
/*
* XXX - Historical comment - no longer quite right...
* Keyboard driver state. The ascii and kbd links go up and down and
* we just sit in the middle doing translation. Note that it is possible
* to get just one of the two links, in which case /dev/kbd is unavailable.
* The downlink supplies us with `internal' open and close routines which
* will enable dataflow across the downlink. We promise to call open when
* we are willing to take keystrokes, and to call close when we are not.
* If /dev/kbd is not the console tty input source, we do this whenever
* /dev/kbd is in use; otherwise we just leave it open forever.
*/
struct kbd_softc {
struct device k_dev; /* required first: base device */
struct zs_chanstate *k_cs;
/* Flags to communicate with kbd_softint() */
volatile int k_intr_flags;
#define INTR_RX_OVERRUN 1
#define INTR_TX_EMPTY 2
#define INTR_ST_CHECK 4
/* Transmit state */
volatile int k_txflags;
#define K_TXBUSY 1
#define K_TXWANT 2
/*
* State of upper interface.
*/
int k_isopen; /* set if open has been done */
int k_evmode; /* set if we should produce events */
struct evvar k_events; /* event queue state */
/*
* ACSI translation state
*/
int k_repeat_start; /* initial delay */
int k_repeat_step; /* inter-char delay */
int k_repeatsym; /* repeating symbol */
int k_repeating; /* we've called timeout() */
struct kbd_state k_state; /* ASCII translation state */
/*
* Magic sequence stuff (L1-A)
*/
char k_isconsole;
char k_magic1_down;
u_char k_magic1; /* L1 */
u_char k_magic2; /* A */
/*
* The transmit ring buffer.
*/
volatile u_int k_tbget; /* transmit buffer `get' index */
volatile u_int k_tbput; /* transmit buffer `put' index */
u_char k_tbuf[KBD_TX_RING_SIZE]; /* data */
/*
* The receive ring buffer.
*/
u_int k_rbget; /* ring buffer `get' index */
volatile u_int k_rbput; /* ring buffer `put' index */
u_short k_rbuf[KBD_RX_RING_SIZE]; /* rr1, data pairs */
};
/* Prototypes */
static void kbd_new_layout(struct kbd_softc *k);
static void kbd_output(struct kbd_softc *k, int c);
static void kbd_repeat(void *arg);
static void kbd_set_leds(struct kbd_softc *k, int leds);
static void kbd_start_tx(struct kbd_softc *k);
static void kbd_update_leds(struct kbd_softc *k);
static void kbd_was_reset(struct kbd_softc *k);
static int kbd_drain_tx(struct kbd_softc *k);
cdev_decl(kbd); /* open, close, read, write, ioctl, stop, ... */
struct zsops zsops_kbd;
/****************************************************************
* Definition of the driver for autoconfig.
****************************************************************/
static int kbd_match(struct device *, struct cfdata *, void *);
static void kbd_attach(struct device *, struct device *, void *);
struct cfattach kbd_ca = {
sizeof(struct kbd_softc), kbd_match, kbd_attach
};
struct cfdriver kbd_cd = {
NULL, "kbd", DV_DULL
};
/*
* kbd_match: how is this zs channel configured?
*/
int
kbd_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct zsc_attach_args *args = aux;
/* Exact match required for keyboard. */
if (cf->cf_loc[ZSCCF_CHANNEL] == args->channel)
return 2;
return 0;
}
void
kbd_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct zsc_softc *zsc = (void *) parent;
struct kbd_softc *k = (void *) self;
struct zsc_attach_args *args = aux;
struct zs_chanstate *cs;
struct cfdata *cf;
int channel, kbd_unit;
int reset, s;
cf = k->k_dev.dv_cfdata;
kbd_unit = k->k_dev.dv_unit;
channel = args->channel;
cs = zsc->zsc_cs[channel];
cs->cs_private = k;
cs->cs_ops = &zsops_kbd;
k->k_cs = cs;
if (args->hwflags & ZS_HWFLAG_CONSOLE) {
k->k_isconsole = 1;
printf(" (console)");
}
printf("\n");
/* Initialize the speed, etc. */
s = splzs();
if (k->k_isconsole == 0) {
/* Not the console; may need reset. */
reset = (channel == 0) ?
ZSWR9_A_RESET : ZSWR9_B_RESET;
zs_write_reg(cs, 9, reset);
}
/* These are OK as set by zscc: WR3, WR4, WR5 */
/* We don't care about status interrupts. */
cs->cs_preg[1] = ZSWR1_RIE | ZSWR1_TIE;
(void) zs_set_speed(cs, KBD_BPS);
zs_loadchannelregs(cs);
splx(s);
/* Do this before any calls to kbd_rint(). */
kbd_xlate_init(&k->k_state);
/* XXX - Do this in open? */
k->k_repeat_start = hz/2;
k->k_repeat_step = hz/20;
/* Magic sequence. */
k->k_magic1 = KBD_L1;
k->k_magic2 = KBD_A;
/* Now attach the (kd) pseudo-driver. */
kd_init(kbd_unit);
}
/****************************************************************
* Entry points for /dev/kbd
* (open,close,read,write,...)
****************************************************************/
/*
* Open:
* Check exclusion, open actual device (_iopen),
* setup event channel, clear ASCII repeat stuff.
*/
int
kbdopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
struct kbd_softc *k;
int error, unit;
unit = minor(dev);
if (unit >= kbd_cd.cd_ndevs)
return (ENXIO);
k = kbd_cd.cd_devs[unit];
if (k == NULL)
return (ENXIO);
/* Exclusive open required for /dev/kbd */
if (k->k_events.ev_io)
return (EBUSY);
k->k_events.ev_io = p;
if ((error = kbd_iopen(unit)) != 0) {
k->k_events.ev_io = NULL;
return (error);
}
ev_init(&k->k_events);
k->k_evmode = 1; /* XXX: OK? */
if (k->k_repeating) {
k->k_repeating = 0;
untimeout(kbd_repeat, k);
}
return (0);
}
/*
* Close:
* Turn off event mode, dump the queue, and close the keyboard
* unless it is supplying console input.
*/
int
kbdclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
struct kbd_softc *k;
k = kbd_cd.cd_devs[minor(dev)];
k->k_evmode = 0;
ev_fini(&k->k_events);
k->k_events.ev_io = NULL;
return (0);
}
int
kbdread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
struct kbd_softc *k;
k = kbd_cd.cd_devs[minor(dev)];
return (ev_read(&k->k_events, uio, flags));
}
/* this routine should not exist, but is convenient to write here for now */
int
kbdwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (EOPNOTSUPP);
}
int
kbdpoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
struct kbd_softc *k;
k = kbd_cd.cd_devs[minor(dev)];
return (ev_poll(&k->k_events, events, p));
}
static int kbd_iockeymap __P((struct kbd_state *ks,
u_long cmd, struct kiockeymap *kio));
static int kbd_iocsled(struct kbd_softc *k, int *data);
#ifdef KIOCGETKEY
static int kbd_oldkeymap __P((struct kbd_state *ks,
u_long cmd, struct okiockey *okio));
#endif
int
kbdioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
register caddr_t data;
int flag;
struct proc *p;
{
struct kbd_softc *k;
struct kbd_state *ks;
int *ip;
int error = 0;
k = kbd_cd.cd_devs[minor(dev)];
ks = &k->k_state;
switch (cmd) {
case KIOCTRANS: /* Set translation mode */
ip = (int *)data;
/* We only support "raw" mode on /dev/kbd */
if (*ip != TR_UNTRANS_EVENT)
error = EINVAL;
break;
case KIOCGTRANS: /* Get translation mode */
ip = (int *)data;
/* We only support "raw" mode on /dev/kbd */
*ip = TR_UNTRANS_EVENT;
break;
#ifdef KIOCGETKEY
case KIOCGETKEY: /* Get keymap entry (old format) */
error = kbd_oldkeymap(ks, cmd, (struct okiockey *)data);
break;
#endif KIOCGETKEY */
case KIOCSKEY: /* Set keymap entry */
/* Don't let just anyone hose the keyboard. */
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
return (error);
/* fallthrough */
case KIOCGKEY: /* Get keymap entry */
error = kbd_iockeymap(ks, cmd, (struct kiockeymap *)data);
break;
case KIOCCMD: /* Send a command to the keyboard */
error = kbd_docmd(*((int *)data), 1);
break;
case KIOCTYPE: /* Get keyboard type */
ip = (int *)data;
*ip = ks->kbd_id;
break;
case KIOCSDIRECT: /* where to send input */
ip = (int *)data;
k->k_evmode = *ip;
break;
case KIOCLAYOUT: /* Get keyboard layout */
*data = ks->kbd_layout;
break;
case KIOCSLED:
error = kbd_iocsled(k, (int *)data);
break;
case KIOCGLED:
*(char *)data = ks->kbd_leds;
break;
case FIONBIO: /* we will remove this someday (soon???) */
break;
case FIOASYNC:
k->k_events.ev_async = *(int *)data != 0;
break;
case TIOCSPGRP:
ip = (int *)data;
if (*ip != k->k_events.ev_io->p_pgid)
error = EPERM;
break;
}
return (error);
}
/****************************************************************
* ioctl helpers
****************************************************************/
/*
* Get/Set keymap entry
*/
static int
kbd_iockeymap(ks, cmd, kio)
struct kbd_state *ks;
u_long cmd;
struct kiockeymap *kio;
{
u_short *km;
u_int station;
switch (kio->kio_tablemask) {
case KIOC_NOMASK:
km = ks->kbd_k.k_normal;
break;
case KIOC_SHIFTMASK:
km = ks->kbd_k.k_shifted;
break;
case KIOC_CTRLMASK:
km = ks->kbd_k.k_control;
break;
case KIOC_UPMASK:
km = ks->kbd_k.k_release;
break;
default:
/* Silently ignore unsupported masks */
return (0);
}
/* Range-check the table position. */
station = kio->kio_station;
if (station >= KEYMAP_SIZE)
return (EINVAL);
switch (cmd) {
case KIOCGKEY: /* Get keymap entry */
kio->kio_entry = km[station];
break;
case KIOCSKEY: /* Set keymap entry */
km[station] = kio->kio_entry;
break;
default:
return(ENOTTY);
}
return (0);
}
#ifdef KIOCGETKEY
/*
* Get/Set keymap entry,
* old format (compatibility)
*/
int
kbd_oldkeymap(ks, cmd, kio)
struct kbd_state *ks;
u_long cmd;
struct okiockey *kio;
{
int error = 0;
switch (cmd) {
case KIOCGETKEY:
if (kio->kio_station == 118) {
/*
* This is X11 asking if a type 3 keyboard is
* really a type 3 keyboard. Say yes, it is,
* by reporting key station 118 as a "hole".
* Note old (SunOS 3.5) definition of HOLE!
*/
kio->kio_entry = 0xA2;
break;
}
/* fall through */
default:
error = ENOTTY;
break;
}
return (error);
}
#endif /* KIOCGETKEY */
/*
* keyboard command ioctl
* ``unimplemented commands are ignored'' (blech)
* This is also export to the fb driver.
*/
int
kbd_docmd(cmd, isuser)
int cmd;
int isuser;
{
struct kbd_softc *k;
struct kbd_state *ks;
int error, s;
error = 0;
k = kbd_cd.cd_devs[0];
ks = &k->k_state;
switch (cmd) {
case KBD_CMD_BELL:
case KBD_CMD_NOBELL:
/* Supported by type 2, 3, and 4 keyboards */
break;
case KBD_CMD_CLICK:
case KBD_CMD_NOCLICK:
/* Unsupported by type 2 keyboards */
if (ks->kbd_id <= KB_SUN2)
return (0);
ks->kbd_click = (cmd == KBD_CMD_CLICK);
break;
default:
return (0);
}
s = spltty();
if (isuser)
error = kbd_drain_tx(k);
if (error == 0) {
kbd_output(k, cmd);
kbd_start_tx(k);
}
splx(s);
return (error);
}
/*
* Set LEDs ioctl.
*/
static int
kbd_iocsled(k, data)
struct kbd_softc *k;
int *data;
{
int leds, error, s;
leds = *data;
s = spltty();
error = kbd_drain_tx(k);
if (error == 0) {
kbd_set_leds(k, leds);
}
splx(s);
return (error);
}
/****************************************************************
* middle layers:
* - keysym to ASCII sequence
* - raw key codes to keysym
****************************************************************/
static void kbd_input_string __P((struct kbd_softc *, char *));
static void kbd_input_funckey __P((struct kbd_softc *, int));
static void kbd_input_keysym __P((struct kbd_softc *, int));
static void kbd_input_raw __P((struct kbd_softc *k, int));
/*
* Initialization done by either kdcninit or kbd_iopen
*/
void
kbd_xlate_init(ks)
struct kbd_state *ks;
{
struct keyboard *ktbls;
int id;
id = ks->kbd_id;
if (id < KBD_MIN_TYPE)
id = KBD_MIN_TYPE;
if (id > kbd_max_type)
id = kbd_max_type;
ktbls = keyboards[id];
ks->kbd_k = *ktbls; /* struct assignment */
ks->kbd_modbits = 0;
}
/*
* Turn keyboard up/down codes into a KEYSYM.
* Note that the "kd" driver uses this too!
*/
int
kbd_code_to_keysym(ks, c)
register struct kbd_state *ks;
register int c;
{
u_short *km;
int keysym;
/*
* Get keymap pointer. One of these:
* release, control, shifted, normal, ...
*/
if (KEY_UP(c))
km = ks->kbd_k.k_release;
else if (ks->kbd_modbits & KBMOD_CTRL_MASK)
km = ks->kbd_k.k_control;
else if (ks->kbd_modbits & KBMOD_SHIFT_MASK)
km = ks->kbd_k.k_shifted;
else
km = ks->kbd_k.k_normal;
if (km == NULL) {
/*
* Do not know how to translate yet.
* We will find out when a RESET comes along.
*/
return (KEYSYM_NOP);
}
keysym = km[KEY_CODE(c)];
/*
* Post-processing for Caps-lock
*/
if ((ks->kbd_modbits & (1 << KBMOD_CAPSLOCK)) &&
(KEYSYM_CLASS(keysym) == KEYSYM_ASCII) )
{
if (('a' <= keysym) && (keysym <= 'z'))
keysym -= ('a' - 'A');
}
/*
* Post-processing for Num-lock
*/
if ((ks->kbd_modbits & (1 << KBMOD_NUMLOCK)) &&
(KEYSYM_CLASS(keysym) == KEYSYM_FUNC) )
{
keysym = kbd_numlock_map[keysym & 0x3F];
}
return (keysym);
}
void
kbd_input_string(k, str)
struct kbd_softc *k;
char *str;
{
while (*str) {
kd_input(*str);
str++;
}
}
void
kbd_input_funckey(k, keysym)
struct kbd_softc *k;
register int keysym;
{
register int n;
char str[12];
/*
* Format the F-key sequence and send as a string.
* XXX: Ugly compatibility mappings.
*/
n = 0xC0 + (keysym & 0x3F);
sprintf(str, "\033[%dz", n);
kbd_input_string(k, str);
}
/*
* This is called by kbd_input_raw() or by kb_repeat()
* to deliver ASCII input. Called at spltty().
*/
void
kbd_input_keysym(k, keysym)
struct kbd_softc *k;
register int keysym;
{
struct kbd_state *ks = &k->k_state;
register int data;
switch (KEYSYM_CLASS(keysym)) {
case KEYSYM_ASCII:
data = KEYSYM_DATA(keysym);
if (ks->kbd_modbits & KBMOD_META_MASK)
data |= 0x80;
kd_input(data);
break;
case KEYSYM_STRING:
data = keysym & 0xF;
kbd_input_string(k, kbd_stringtab[data]);
break;
case KEYSYM_FUNC:
kbd_input_funckey(k, keysym);
break;
case KEYSYM_CLRMOD:
data = 1 << (keysym & 0x1F);
ks->kbd_modbits &= ~data;
break;
case KEYSYM_SETMOD:
data = 1 << (keysym & 0x1F);
ks->kbd_modbits |= data;
break;
case KEYSYM_INVMOD:
data = 1 << (keysym & 0x1F);
ks->kbd_modbits ^= data;
kbd_update_leds(k);
break;
case KEYSYM_ALL_UP:
ks->kbd_modbits &= ~0xFFFF;
break;
case KEYSYM_SPECIAL:
if (keysym == KEYSYM_NOP)
break;
/* fall through */
default:
log(LOG_WARNING, "%s: unexpected keysym 0x%x\n",
k->k_dev.dv_xname, keysym);
break;
}
}
/*
* This is the autorepeat timeout function.
* Called at splsoftclock().
*/
static void
kbd_repeat(void *arg)
{
struct kbd_softc *k = (struct kbd_softc *)arg;
int s = spltty();
if (k->k_repeating && k->k_repeatsym >= 0) {
kbd_input_keysym(k, k->k_repeatsym);
timeout(kbd_repeat, k, k->k_repeat_step);
}
splx(s);
}
/*
* Called by our kbd_softint() routine on input,
* which passes the raw hardware scan codes.
* Called at spltty()
*/
void
kbd_input_raw(k, c)
struct kbd_softc *k;
register int c;
{
struct kbd_state *ks = &k->k_state;
struct firm_event *fe;
int put, keysym;
/* XXX - Input errors already handled. */
/* Are we expecting special input? */
if (ks->kbd_expect) {
if (ks->kbd_expect & KBD_EXPECT_IDCODE) {
/* We read a KBD_RESET last time. */
ks->kbd_id = c;
kbd_was_reset(k);
}
if (ks->kbd_expect & KBD_EXPECT_LAYOUT) {
/* We read a KBD_LAYOUT last time. */
ks->kbd_layout = c;
kbd_new_layout(k);
}
ks->kbd_expect = 0;
return;
}
/* Is this one of the "special" input codes? */
if (KBD_SPECIAL(c)) {
switch (c) {
case KBD_RESET:
ks->kbd_expect |= KBD_EXPECT_IDCODE;
/* Fake an "all-up" to resync. translation. */
c = KBD_IDLE;
break;
case KBD_LAYOUT:
ks->kbd_expect |= KBD_EXPECT_LAYOUT;
return;
case KBD_ERROR:
log(LOG_WARNING, "%s: received error indicator\n",
k->k_dev.dv_xname);
return;
case KBD_IDLE:
/* Let this go to the translator. */
break;
}
}
/*
* If /dev/kbd is not connected in event mode,
* translate and send upstream (to console).
*/
if (!k->k_evmode) {
/* Any input stops auto-repeat (i.e. key release). */
if (k->k_repeating) {
k->k_repeating = 0;
untimeout(kbd_repeat, k);
}
/* Translate this code to a keysym */
keysym = kbd_code_to_keysym(ks, c);
/* Pass up to the next layer. */
kbd_input_keysym(k, keysym);
/* Does this symbol get auto-repeat? */
if (KEYSYM_NOREPEAT(keysym))
return;
/* Setup for auto-repeat after initial delay. */
k->k_repeating = 1;
k->k_repeatsym = keysym;
timeout(kbd_repeat, k, k->k_repeat_start);
return;
}
/*
* IDLEs confuse the MIT X11R4 server badly, so we must drop them.
* This is bad as it means the server will not automatically resync
* on all-up IDLEs, but I did not drop them before, and the server
* goes crazy when it comes time to blank the screen....
*/
if (c == KBD_IDLE)
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, "%s: event queue overflow\n",
k->k_dev.dv_xname); /* ??? */
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);
}
/****************************************************************
* Interface to the lower layer (zscc)
****************************************************************/
static void kbd_rxint __P((struct zs_chanstate *));
static void kbd_txint __P((struct zs_chanstate *));
static void kbd_stint __P((struct zs_chanstate *));
static void kbd_softint __P((struct zs_chanstate *));
static void
kbd_rxint(cs)
register struct zs_chanstate *cs;
{
register struct kbd_softc *k;
register int put, put_next;
register u_char c, rr1;
k = cs->cs_private;
put = k->k_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);
}
/*
* Check NOW for a console abort sequence, so that we can
* abort even when interrupts are locking up the machine.
*/
if (k->k_magic1_down) {
/* The last keycode was "MAGIC1" down. */
k->k_magic1_down = 0;
if ((c == k->k_magic2) && k->k_isconsole) {
/* Magic "L1-A" sequence; enter debugger. */
zs_abort(cs);
/* Debugger done. Fake L1-up to finish it. */
c = k->k_magic1 | KBD_UP;
}
}
if (c == k->k_magic1) {
k->k_magic1_down = 1;
}
k->k_rbuf[put] = (c << 8) | rr1;
put_next = (put + 1) & KBD_RX_RING_MASK;
/* Would overrun if increment makes (put==get). */
if (put_next == k->k_rbget) {
k->k_intr_flags |= INTR_RX_OVERRUN;
} else {
/* OK, really increment. */
put = put_next;
}
/* Done reading. */
k->k_rbput = put;
/* Ask for softint() call. */
cs->cs_softreq = 1;
}
static void
kbd_txint(cs)
register struct zs_chanstate *cs;
{
register struct kbd_softc *k;
k = cs->cs_private;
zs_write_csr(cs, ZSWR0_RESET_TXINT);
k->k_intr_flags |= INTR_TX_EMPTY;
/* Ask for softint() call. */
cs->cs_softreq = 1;
}
static void
kbd_stint(cs)
register struct zs_chanstate *cs;
{
register struct kbd_softc *k;
register int rr0;
k = cs->cs_private;
rr0 = zs_read_csr(cs);
zs_write_csr(cs, ZSWR0_RESET_STATUS);
#if 0
if (rr0 & ZSRR0_BREAK) {
/* Keyboard unplugged? */
zs_abort(cs);
return (0);
}
#endif
/*
* 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;
k->k_intr_flags |= INTR_ST_CHECK;
/* Ask for softint() call. */
cs->cs_softreq = 1;
}
/*
* Get input from the recieve ring and pass it on.
* Note: this is called at splsoftclock()
*/
static void
kbd_softint(cs)
struct zs_chanstate *cs;
{
register struct kbd_softc *k;
register int get, c, s;
int intr_flags;
register u_short ring_data;
k = cs->cs_private;
/* Atomically get and clear flags. */
s = splzs();
intr_flags = k->k_intr_flags;
k->k_intr_flags = 0;
/* Now lower to spltty for the rest. */
(void) spltty();
/*
* Copy data from the receive ring to the event layer.
*/
get = k->k_rbget;
while (get != k->k_rbput) {
ring_data = k->k_rbuf[get];
get = (get + 1) & KBD_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)) {
/*
* After garbage, flush pending input, and
* send a reset to resync key translation.
*/
log(LOG_ERR, "%s: input error (0x%x)\n",
k->k_dev.dv_xname, ring_data);
get = k->k_rbput; /* flush */
goto send_reset;
}
/* Pass this up to the "middle" layer. */
kbd_input_raw(k, c);
}
if (intr_flags & INTR_RX_OVERRUN) {
log(LOG_ERR, "%s: input overrun\n",
k->k_dev.dv_xname);
send_reset:
/* Send a reset to resync translation. */
kbd_output(k, KBD_CMD_RESET);
kbd_start_tx(k);
}
k->k_rbget = get;
if (intr_flags & INTR_TX_EMPTY) {
/*
* Transmit done. Try to send more, or
* clear busy and wakeup drain waiters.
*/
k->k_txflags &= ~K_TXBUSY;
kbd_start_tx(k);
}
if (intr_flags & INTR_ST_CHECK) {
/*
* Status line change. (Not expected.)
*/
log(LOG_ERR, "%s: status interrupt?\n",
k->k_dev.dv_xname);
cs->cs_rr0_delta = 0;
}
splx(s);
}
struct zsops zsops_kbd = {
kbd_rxint, /* receive char available */
kbd_stint, /* external/status */
kbd_txint, /* xmit buffer empty */
kbd_softint, /* process software interrupt */
};
/****************************************************************
* misc...
****************************************************************/
/*
* Initialization to be done at first open.
* This is called from kbdopen or kdopen (in kd.c)
* Called with user context.
*/
int
kbd_iopen(unit)
int unit;
{
struct kbd_softc *k;
struct kbd_state *ks;
int error, s;
if (unit >= kbd_cd.cd_ndevs)
return (ENXIO);
k = kbd_cd.cd_devs[unit];
if (k == NULL)
return (ENXIO);
ks = &k->k_state;
error = 0;
/* Tolerate extra calls. */
if (k->k_isopen)
return (error);
s = spltty();
/* Reset the keyboard and find out its type. */
kbd_output(k, KBD_CMD_RESET);
kbd_start_tx(k);
kbd_drain_tx(k);
/* The wakeup for this is in kbd_was_reset(). */
error = tsleep((caddr_t)&ks->kbd_id,
PZERO | PCATCH, devopn, hz);
if (error == EWOULDBLOCK) { /* no response */
error = 0;
log(LOG_ERR, "%s: reset failed\n",
k->k_dev.dv_xname);
/*
* Allow the open anyway (to keep getty happy)
* but assume the "least common denominator".
*/
ks->kbd_id = KB_SUN2;
}
/* Earlier than type 4 does not know "layout". */
if (ks->kbd_id < KB_SUN4)
goto out;
/* Ask for the layout. */
kbd_output(k, KBD_CMD_GETLAYOUT);
kbd_start_tx(k);
kbd_drain_tx(k);
/* The wakeup for this is in kbd_new_layout(). */
error = tsleep((caddr_t)&ks->kbd_layout,
PZERO | PCATCH, devopn, hz);
if (error == EWOULDBLOCK) { /* no response */
error = 0;
log(LOG_ERR, "%s: no response to get_layout\n",
k->k_dev.dv_xname);
ks->kbd_layout = 0;
}
out:
splx(s);
if (error == 0)
k->k_isopen = 1;
return error;
}
/*
* Called by kbd_input_raw, at spltty()
*/
static void
kbd_was_reset(k)
struct kbd_softc *k;
{
struct kbd_state *ks = &k->k_state;
/*
* On first identification, wake up anyone waiting for type
* and set up the table pointers.
*/
wakeup((caddr_t)&ks->kbd_id);
/* Restore keyclick, if necessary */
switch (ks->kbd_id) {
case KB_SUN2:
/* Type 2 keyboards don't support keyclick */
break;
case KB_SUN3:
/* Type 3 keyboards come up with keyclick on */
if (!ks->kbd_click) {
/* turn off the click */
kbd_output(k, KBD_CMD_NOCLICK);
kbd_start_tx(k);
}
break;
case KB_SUN4:
/* Type 4 keyboards come up with keyclick off */
if (ks->kbd_click) {
/* turn on the click */
kbd_output(k, KBD_CMD_CLICK);
kbd_start_tx(k);
}
break;
}
/* LEDs are off after reset. */
ks->kbd_leds = 0;
}
/*
* Called by kbd_input_raw, at spltty()
*/
static void
kbd_new_layout(k)
struct kbd_softc *k;
{
struct kbd_state *ks = &k->k_state;
/*
* On first identification, wake up anyone waiting for type
* and set up the table pointers.
*/
wakeup((caddr_t)&ks->kbd_layout);
/* XXX: switch decoding tables? */
}
/*
* Wait for output to finish.
* Called at spltty(). Has user context.
*/
static int
kbd_drain_tx(k)
struct kbd_softc *k;
{
int error;
error = 0;
while (k->k_txflags & K_TXBUSY) {
k->k_txflags |= K_TXWANT;
error = tsleep((caddr_t)&k->k_txflags,
PZERO | PCATCH, "kbdout", 0);
}
return (error);
}
/*
* Enqueue some output for the keyboard
* Called at spltty().
*/
static void
kbd_output(k, c)
struct kbd_softc *k;
int c; /* the data */
{
int put;
put = k->k_tbput;
k->k_tbuf[put] = (u_char)c;
put = (put + 1) & KBD_TX_RING_MASK;
/* Would overrun if increment makes (put==get). */
if (put == k->k_tbget) {
log(LOG_WARNING, "%s: output overrun\n",
k->k_dev.dv_xname);
} else {
/* OK, really increment. */
k->k_tbput = put;
}
}
/*
* Start the sending data from the output queue
* Called at spltty().
*/
static void
kbd_start_tx(k)
struct kbd_softc *k;
{
struct zs_chanstate *cs = k->k_cs;
int get, s;
u_char c;
if (k->k_txflags & K_TXBUSY)
return;
/* Is there anything to send? */
get = k->k_tbget;
if (get == k->k_tbput) {
/* Nothing to send. Wake drain waiters. */
if (k->k_txflags & K_TXWANT) {
k->k_txflags &= ~K_TXWANT;
wakeup((caddr_t)&k->k_txflags);
}
return;
}
/* Have something to send. */
c = k->k_tbuf[get];
get = (get + 1) & KBD_TX_RING_MASK;
k->k_tbget = get;
k->k_txflags |= K_TXBUSY;
/* Need splzs to avoid interruption of the delay. */
s = splzs();
zs_write_data(cs, c);
splx(s);
}
/*
* Called at spltty by:
* kbd_update_leds, kbd_iocsled
*/
static void
kbd_set_leds(k, new_leds)
struct kbd_softc *k;
int new_leds;
{
struct kbd_state *ks = &k->k_state;
/* Don't send unless state changes. */
if (ks->kbd_leds == new_leds)
return;
ks->kbd_leds = new_leds;
/* Only type 4 and later has LEDs anyway. */
if (ks->kbd_id < 4)
return;
kbd_output(k, KBD_CMD_SETLED);
kbd_output(k, new_leds);
kbd_start_tx(k);
}
/*
* Called at spltty by:
* kbd_input_keysym
*/
static void
kbd_update_leds(k)
struct kbd_softc *k;
{
struct kbd_state *ks = &k->k_state;
register char leds;
leds = ks->kbd_leds;
leds &= ~(LED_CAPS_LOCK|LED_NUM_LOCK);
if (ks->kbd_modbits & (1 << KBMOD_CAPSLOCK))
leds |= LED_CAPS_LOCK;
if (ks->kbd_modbits & (1 << KBMOD_NUMLOCK))
leds |= LED_NUM_LOCK;
kbd_set_leds(k, leds);
}
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