Coherent4.2.10/conf/nkb/src/nkb.c
/* $Header: /ker/io.386/RCS/nkb.c,v 2.5 93/08/19 10:39:17 nigel Exp Locker: nigel $ */
/*
* Keyboard driver, no virtual consoles, loadable tables.
*
* $Log: nkb.c,v $
* Revision 2.5 93/08/19 10:39:17 nigel
* r83 ioctl (), corefile, new headers
*
* Revision 2.4 93/08/19 04:03:03 nigel
* Nigel's R83
*/
#include <sys/errno.h>
#include <sys/stat.h>
#include <signal.h>
#include <stddef.h>
#include <sys/coherent.h>
#include <sys/uproc.h>
#include <sys/con.h>
#include <sys/tty.h>
#include <sys/seg.h>
#include <sys/sched.h>
#include <sys/kb.h>
#include <sys/devices.h>
#include <sys/silo.h>
#include <sys/vtkd.h>
#if DEBUG
#define KBDEBUG(x) printf(x) /* debugging output */
#define KBDEBUG2(x, y) printf(x, y) /* debugging output */
#define KBDEBUG3(x, y, z) printf(x, y, z) /* debugging output */
#else
#define KBDEBUG(x) /* no output */
#define KBDEBUG2(x, y) /* no output */
#define KBDEBUG3(x, y, z) /* no output */
#endif
/*
* values for kbstate
*/
#define KB_IDLE 0 /* nothing going on right now */
#define KB_SINGLE 1 /* sent a single byte cmd to the kbd */
#define KB_DOUBLE_1 2 /* sent 1st byte of 2-byte cmd to kbd */
#define KB_DOUBLE_2 3 /* sent 2nd byte of 2-byte cmd to kbd */
/*
* patchable params for non-standard keyboards
*/
int KBDATA = 0x60; /* Keyboard data */
int KBCTRL = 0x61; /* Keyboard control */
int KBSTS_CMD = 0x64; /* Keyboard status / command */
int KBFLAG = 0x80; /* Keyboard reset flag */
int KBBOOT = 1; /* 0: disallow reboot from keyboard */
int KBTIMEOUT = 10000; /* shouldn't need this much */
int KBCMDBYTE = 0x05; /* no translation */
/*
* KBSTATUS bits
*/
#define STS_OBUF_FULL 0x01 /* kbd output buffer full */
#define STS_IBUF_FULL 0x02 /* kbd input buffer full */
#define STS_SYSTEM 0x04
#define STS_CMD_DATA 0x08 /* 1: command or status */
#define STS_INHIBIT 0x10 /* 0: keyboard inhibited */
#define STS_AUX_OBUF_FULL 0x20
#define STS_TIMEOUT 0x40 /* general timeout */
#define STS_PAR_ERR 0x80 /* parity error */
/*
* The following are magic commands which read from or write to the
* controller command byte. These get output to the KBSTS_CMD port.
*/
#define C_READ_CMD 0x20 /* read controller command byte */
#define C_WRITE_CMD 0x60 /* write controller command byte */
#define C_TRANSLATE 0x40 /* translate enable bit in cmd byte */
/*
* Globals:
* The 286 keyboard mapping table is too large to fit into kernel data space,
* so we need to allocate a segment to it. 386 is easy.
* The function keys tend to be small and tend to change substantially
* more often than the mapping table, so we keep them in the kernel data space.
*/
static unsigned shift; /* state of all shift / lock keys */
static unsigned char ** funkeyp = 0; /* ptr to array of func. keys ptrs */
static FNKEY * fnkeys = 0; /* pointer to structure of values */
static unsigned fklength; /* length of function key data */
static unsigned prev_cmd; /* previous command sent to KBD */
static unsigned cmd2; /* 2nd byte of command to KBD */
static unsigned sh_index; /* shift / lock state index */
#ifdef _I386
static KBTBL kb [MAX_KEYS]; /* keyboard table */
#else
static SEG * kbsegp; /* keyboard table segment */
#endif
/*
* State variables.
*/
int islock; /* Keyboard locked flag */
int isbusy; /* Raw input conversion busy */
static char table_loaded; /* true == keyboard table resident */
static char fk_loaded; /* true == function keys resident */
static int kbstate = KB_IDLE; /* current keyboard state */
static int xlate = 1; /* scan code translation flag */
#define ESCAPE_CHAR '\x1B'
#define ESCAPE_STRING "\x1B"
static int X11led;
/*
* Functions.
*/
int mmstart ();
int mmwrite ();
void mmwatch ();
/*
* Terminal structure.
*/
TTY istty = {
{0}, {0}, 0, mmstart, NULL, 0, 0
};
static silo_t in_silo;
/*
* Load entry point.
*/
void
isload ()
{
kbstate = KB_IDLE;
table_loaded = 0; /* no keyboard table yet */
fk_loaded = 0; /* no Fn keys yet */
/*
* Enable mmwatch () invocation every second.
*/
drvl [KB_MAJOR].d_time = 1;
/*
* Initiailize video display.
*/
mmstart (& istty);
fklength = 0;
KBDEBUG ("Exiting kbload ()\n");
}
/*
* Unload entry point.
*/
void
isuload ()
{
if (kbstate != KB_IDLE)
printf ("kb: keyboard busy during unload\n");
}
/*
* ship a single byte command to the keyboard
*/
void
kb_cmd (cmd)
unsigned cmd;
{
int timeout;
int s;
s = sphi ();
KBDEBUG2(" kb_cmd (%x)", cmd);
while (kbstate != KB_IDLE) {
/* The nkb driver is waiting for a command to complete. */
x_sleep (& kbstate, pritty, slpriSigLjmp, "nkbcmd");
}
kbstate = KB_SINGLE;
timeout = KBTIMEOUT;
while (--timeout > 0 && (inb (KBSTS_CMD) & STS_IBUF_FULL))
;
if (! timeout)
printf ("kb: command timeout\n");
else {
outb (KBDATA, cmd);
while (kbstate != KB_IDLE) {
/* The nkb driver is still waiting for a command to complete. */
x_sleep (& kbstate, pritty, slpriSigLjmp, "nkbcmd...");
}
}
spl (s);
}
/*
* ship a two byte command to the keyboard
*/
void
kb_cmd2(cmd, arg)
unsigned cmd, arg;
{
int timeout;
int s;
s = sphi ();
KBDEBUG3(" kb_cmd2(%x, %x)", cmd, arg);
while (kbstate != KB_IDLE) {
/*
* The nkb driver is waiting for a
* 2 byte command to complete.
*/
x_sleep (& kbstate, pritty, slpriSigLjmp, "nkbcmd2...");
}
kbstate = KB_DOUBLE_1;
cmd2 = arg;
prev_cmd = cmd;
timeout = KBTIMEOUT;
while (--timeout > 0 && (inb (KBSTS_CMD) & STS_IBUF_FULL))
;
if (! timeout)
printf ("kb: command timeout\n");
else {
outb (KBDATA, cmd);
while (kbstate != KB_IDLE) {
/*
* The nkb driver is still waiting for a
* 2 byte command to complete.
*/
x_sleep (& kbstate, pritty, slpriSigLjmp, "nkbcmd2...");
}
}
spl (s);
}
/*
* update the keyboard status LEDS.
* we chose the shift / lock key positions so this would be easy.
* this flavor of routine is called while processing a system call on
* behalf of the user.
*/
void
updleds ()
{
if (! xlate)
kb_cmd2(K_LED_CMD, X11led);
else
kb_cmd2(K_LED_CMD, (shift >> 1) & 0x7);
}
/*
* same as above, but callable from interrupt routines and other places
* which cannot sleep () waiting for the state machine to go idle.
*/
void
updleds2()
{
int timeout;
int s;
timeout = KBTIMEOUT;
s = sphi ();
while (--timeout > 0 && (inb (KBSTS_CMD) & STS_IBUF_FULL))
;
kbstate = KB_DOUBLE_1;
if (! xlate)
cmd2 = X11led;
else
cmd2 = (shift >> 1) & 0x7;
prev_cmd = K_LED_CMD;
outb (KBDATA, K_LED_CMD);
spl (s);
}
/*
* Open routine.
*/
void
isopen (dev, mode)
dev_t dev;
unsigned int mode;
{
int s;
KBDEBUG (" kbopen ()");
if (minor (dev) != 0) {
set_user_error (ENXIO);
return;
}
if ((istty.t_flags & T_EXCL) != 0 && ! super ()) {
set_user_error (ENODEV);
return;
}
ttsetgrp (& istty, dev, mode);
s = sphi ();
if (istty.t_open ++ == 0) {
istty.t_flags = T_CARR; /* indicate "carrier" */
ttopen (& istty);
}
spl (s);
#if 0
updleds (); /* update keyboard status LEDS */
#endif
}
/*
* Close a tty.
*/
void
isclose (dev)
dev_t dev;
{
int s;
s = sphi ();
if (-- istty.t_open == 0) {
ttclose (& istty);
}
spl (s);
}
/*
* Read routine.
*/
void
isread (dev, iop)
dev_t dev;
IO * iop;
{
ttread (& istty, iop, 0);
if (istty.t_oq.cq_cc)
mmtime (& istty);
}
#define TIMER_CTL 0x43 /* Timer control */
#define TIMER_CNT 0x42 /* Timer counter */
#define SPEAKER_CTL 0x61 /* Speaker control */
static TIM tp;
void
resetkb (action)
int action;
{
if (action == 1) {
timeout (& tp, 20, resetkb, 2);
outb (KBCTRL, 0xCC); /* Clock high */
}
if (action == 2) {
int i = inb (KBDATA);
outb (KBCTRL, 0xCC); /* Clear keyboard */
outb (KBCTRL, 0x4D); /* Enable keyboard */
}
}
/*
* Set the in-core keyboard mapping table.
* The table is sorted by scan code prior to calling ioctl ().
* All unused table entries (holes in the scan code map) have
* a zero for the k_key field.
* This makes key lookup at interrupt time fast by using the scan code
* as an index into the table.
*/
void
issettable (vec)
char * vec;
{
unsigned i;
int s;
int timeout;
static KBTBL this_key; /* current key from kbd table */
unsigned int cmd_byte;
KBDEBUG (" TIOCSETKBT");
kb_cmd2 (K_SCANCODE_CMD, 3); /* select set 3 */
kb_cmd (K_ALL_TMB_CMD); /* default: TMB for all keys */
for (i = 0; i < MAX_KEYS; ++ i) {
ukcopy (vec, & this_key, sizeof (this_key));
kb [i] = this_key; /* store away */
vec += sizeof (this_key);
if (this_key.k_key != i && this_key.k_key != 0) {
printf ("kb: incorrect or unsorted table entry %d\n", i);
set_user_error (EINVAL);
return;
}
if (this_key.k_key != i)
continue; /* no key */
switch (this_key.k_flags & TMODE) {
case T: /* typematic */
kb_cmd2 (K_KEY_T_CMD, i);
break;
case M: /* make only */
kb_cmd2 (K_KEY_M_CMD, i);
break;
case MB: /* make / break */
kb_cmd2 (K_KEY_MB_CMD, i);
break;
case TMB: /* typematic make / break */
break; /* this is the default */
default:
printf ("kb: bad key mode\n");
}
}
updleds ();
kb_cmd2 (K_SCANCODE_CMD, 3); /* select set 3 */
kb_cmd (K_ENABLE_CMD); /* start scanning */
/*
* The following code disables translation from the on-board
* keyboard / aux controller. Without disabling translation, the
* received scan codes still look like code set 1 codes even
* though we put the keyboard controller in scan code set 3.
* Yes, this is progress....
*/
#if 0
while (inb (KBSTS_CMD) & STS_IBUF_FULL)
;
outb (KBSTS_CMD, C_READ_CMD); /* read controller cmd byte */
while (!(inb (KBSTS_CMD) & STS_OBUF_FULL))
;
cmd_byte = inb (KBDATA);
KBDEBUG2(" cmd_byte =%x", cmd_byte);
#endif
timeout = KBTIMEOUT;
s = sphi ();
while ((inb (KBSTS_CMD) & STS_IBUF_FULL) != 0 && -- timeout > 0)
/* DO NOTHING */ ;
outb (KBSTS_CMD, C_WRITE_CMD); /* write controller cmd byte */
for (timeout = 50 ; -- timeout > 0;)
/* DO NOTHING */ ;
timeout = KBTIMEOUT;
while ((inb (KBSTS_CMD) & STS_IBUF_FULL) != 0 && -- timeout > 0)
/* DO NOTHING */ ;
outb (KBDATA, KBCMDBYTE); /* turn off translation */
timeout = KBTIMEOUT;
while ((inb (KBSTS_CMD) & STS_IBUF_FULL) != 0 && --timeout > 0)
/* DO NOTHING */ ;
spl (s);
#if DEBUG
kb_cmd2 (K_SCANCODE_CMD, 0); /* query s.c. mode */
#endif
++ table_loaded;
}
/*
* Get the in-core keyboard mapping table and pass it to the user.
*/
void
isgettable (vec)
char * vec;
{
KBDEBUG (" TIOCGETKBT");
kucopy (kb, vec, sizeof (kb));
}
/*
* Set and receive the function keys.
*/
void
isfunction (c, v)
int c;
FNKEY * v;
{
unsigned char * cp;
unsigned i;
unsigned char numkeys = 0;
if (c == TIOCGETF) {
KBDEBUG (" TIOCGETF");
if (! fk_loaded)
set_user_error (EINVAL);
else
kucopy (fnkeys, v, fklength); /* copy ours to user */
} else { /* TIOCSETF */
/*
* If we had a previous function key arena, free it up.
* Since we don't know how large the function key arena will
* be, we must size it in the user data space prior to
* (re)kalloc ()'ing it. This is ugly, but a helluva lot better
* than the old driver which used a hard coded limit of 150!
*/
KBDEBUG (" TIOCSETF");
fk_loaded = 0;
if (fnkeys != NULL)
kfree (fnkeys); /* free old arena */
if (funkeyp != NULL)
kfree (funkeyp); /* free old ptr array */
ukcopy (& v->k_nfkeys, & numkeys, sizeof (numkeys));
fklength = sizeof (FNKEY);
cp = (char *) (v + 1);
for (i = 0; i < numkeys; i ++) {
do {
++ fklength;
} while (getubd (cp ++) != DELIM);
}
fnkeys = (FNKEY *) kalloc (fklength);
funkeyp = (unsigned char **) kalloc (numkeys * sizeof (char *));
if (fnkeys == NULL || funkeyp == NULL) {
if (fnkeys != NULL) {
kfree (fnkeys);
fnkeys = 0;
}
if (funkeyp != NULL) {
kfree (funkeyp);
funkeyp = 0;
}
set_user_error (ENOMEM);
return;
}
cp = (char *) (fnkeys + 1); /* point to Fn ... */
v = (FNKEY *) (v + 1); /* ... key arena */
for (i = 0; i < numkeys; i ++) {
funkeyp [i] = cp; /* save pointer */
while ((* cp ++ = getubd (v ++)) != DELIM)
/* DO NOTHING */ ;
}
fnkeys->k_nfkeys = numkeys;
fk_loaded = 1;
}
}
/*
* Ioctl routine.
* nb: archaic TIOCSHIFT and TIOCCSHIFT no longer needed / supported.
*/
void
isioctl (dev, com, vec)
dev_t dev;
struct sgttyb * vec;
{
int s;
switch (com) {
#define KDDEBUG 0
#if KDDEBUG
case KDMEMDISP: {
struct kd_memloc * mem;
unsigned char ub, pb;
mem = vec;
pxcopy ( mem->physaddr, & pb, 1, SEL_386_KD);
ub = getubd (mem->vaddr);
printf ("User's byte %x (%x), Physical byte %x, Addresses %x %x\n",
mem->ioflg, ub, pb, mem->vaddr, mem->physaddr);
break;
}
#endif
case KDMAPDISP: {
struct kd_memloc * mem;
mem = (struct kd_memloc *) vec;
mapPhysUser (mem->vaddr, mem->physaddr, mem->length);
}
case KDDISABIO:
__kddisabio();
break;
case KDENABIO:
__kdenabio();
break;
case KDADDIO:
__kdaddio((unsigned short)vec);
break;
case KDDELIO:
__kddelio((unsigned short)vec);
break;
case KIOCSOUND: {
if (vec) {
outb (TIMER_CTL, 0xB6);
outb (TIMER_CNT, (int)vec & 0xFF);
outb (TIMER_CNT, (int)vec >> 8);
/* Turn speaker on */
outb (SPEAKER_CTL, inb (SPEAKER_CTL) | 03);
} else
outb (SPEAKER_CTL, inb (SPEAKER_CTL) & ~ 03 );
break;
}
case KDSKBMODE: {
static int vtB4X11;
#if 0
outb (KBCTRL, 0x0C); /* Clock low */
timeout (& tp, 3, resetkb, 1); /* wait about 20-30ms */
#endif
if (xlate > (int) vec) { /* Turning translation off */
kb_cmd2(K_SCANCODE_CMD, 1); /* set 1 for X */
#if 0
/* deactivate virtual terminal */
vtB4X11 = vtactive;
vtdeactivate (vtdata [vtactive], vtdata [vtcount]);
vtactivate (vtdata [vtcount]);
vtactive = vtcount;
#endif
} else if (xlate < (int) vec) { /* turning translation on */
kb_cmd2(K_SCANCODE_CMD, 3); /* set 3 for COH */
#if 0
/* reactivate virtual terminal */
vtactivate (vtdata [vtB4X11]);
vtactive = vtB4X11;
#endif
}
xlate = (int) vec;
#if 0
kb_cmd (K_ALL_TMB_CMD); /* default: TMB for all keys */
#endif
break;
}
case KDGKBSTATE:
* (char *) vec = 0;
if (shift & ((1 << lshift) | ( 1 << rshift)))
* (char *) vec |= M_KDGKBSTATE_SHIFT;
if (shift & ((1 << lctrl) | (1 << rctrl)))
* (char *) vec |= M_KDGKBSTATE_CTRL;
if (shift & ((1 << lalt) | (1 << ralt)))
* (char *) vec |= M_KDGKBSTATE_ALT;
break;
case KDSETLED: {
X11led = (int) vec;
updleds ();
break;
}
case KDGETLED:
* (char *) vec = 0;
if (shift & (1 << num))
* (char *) vec |= M_KDGETLED_NUMLOCK;
if (shift & (1 << caps))
* (char *) vec |= M_KDGETLED_CAPLOCK;
if (shift & (1 << scroll))
* (char *) vec |= M_KDGETLED_SCRLOCK;
break;
case TIOCSETF:
case TIOCGETF:
isfunction (com, (char *)vec);
break;
case TIOCSETKBT:
issettable (vec);
break;
case TIOCGETKBT:
isgettable (vec);
break;
case KIOCINFO:
* (int *) vec = 0x6664;
break;
default: /* pass to TTY driver */
s = sphi ();
ttioctl (& istty, com, vec);
spl (s);
break;
}
}
/*
* Poll routine.
*/
int
ispoll (dev, ev, msec)
dev_t dev;
int ev;
int msec;
{
return ttpoll (& istty, ev, msec);
}
/**
*
* void
* isin (c) -- append character to raw input silo
* char c;
*/
static void
isin (c)
int c;
{
int cache_it = 1;
TTY * tp = & istty;
void ttstart ();
/*
* If using software incoming flow control, process and
* discard t_stopc and t_startc.
*/
if (_IS_IXON_MODE (tp)) {
#if _I386
if (_IS_START_CHAR (tp, c) ||
(_IS_IXANY_MODE (tp) && (tp->t_flags & T_STOP) != 0)) {
tp->t_flags &= ~ (T_STOP | T_XSTOP);
ttstart (tp);
cache_it = 0;
} else if (_IS_STOP_CHAR (tp, c)) {
if ((tp->t_flags & T_STOP) == 0)
tp->t_flags |= (T_STOP | T_XSTOP);
cache_it = 0;
}
#else
if (_IS_STOP_CHAR (tp, c)) {
if ((tp->t_flags & T_STOP) == 0)
tp->t_flags |= T_STOP;
cache_it = 0;
}
if (I_S_START_CHAR (tp, c)) {
tp->t_flags &= ~ T_STOP;
ttstart (tp);
cache_it = 0;
}
#endif
}
/*
* Cache received character.
*/
if (cache_it) {
in_silo.si_buf [in_silo.si_ix] = c;
if (++ in_silo.si_ix >= sizeof (in_silo.si_buf))
in_silo.si_ix = 0;
}
}
/*
* Process a key given its scan code and direction.
*
* In this table driven version of the keyboard driver, we trade off the
* code complexity associated with all the black magic that used to be
* performed on a per-key basis with the increased memory requirements
* associated with the table driven approach.
*/
void
process_key (key, up)
unsigned key;
int up;
{
unsigned char * cp;
KBTBL key_vals; /* table values for this key */
unsigned val;
unsigned char flags;
KBDEBUG3(" proc (%x %s)", key, (up ? "up" : "down"));
if (! table_loaded)
return; /* throw away key */
key_vals = kb [key];
if (key_vals.k_key != key) /* empty entry */
return;
flags = key_vals.k_flags;
if (flags & S) { /* some shift / lock key ? */
switch (key_vals.k_val [BASE]) {
case caps:
case num:
if (! up) {
shift ^= (1 << key_vals.k_val [BASE]);
updleds2 ();
}
break;
case scroll:
if (! up) {
shift ^= (1 << key_vals.k_val [BASE]);
updleds2 ();
if (! _IS_RAW_INPUT_MODE (& istty)) {
if (istty.t_flags & T_STOP)
isin (istty.t_tchars.t_startc);
else
isin (istty.t_tchars.t_stopc);
}
}
break;
default:
if (up)
shift &= ~(1 << key_vals.k_val [BASE]);
else
shift |= (1 << key_vals.k_val [BASE]);
break;
}
/*
* Calculate the shift index based upon the state of
* the shift and lock keys.
*/
sh_index = BASE; /* default condition */
if (shift & (1 << altgr))
sh_index = ALT_GR;
else {
if (shift & ((1 << lalt)|(1 << ralt)))
sh_index |= ALT;
if (shift & ((1 << lctrl)|(1 << rctrl)))
sh_index |= CTRL;
if (shift & ((1 << lshift)|(1 << rshift)))
sh_index |= SHIFT;
}
} /* if (flags & S) */
/*
* If the tty is not open or the key has no value in the current
* shift state, the key is just tossed away.
*/
if (up || ! istty.t_open || key_vals.k_val [sh_index] == none)
return;
if (((flags & C) != 0 && (shift & (1 << caps)) != 0) ||
((flags & N) != 0 && (shift & (1 << num)) != 0))
val = key_vals.k_val [sh_index ^ SHIFT];
else
val = key_vals.k_val [sh_index];
/*
* Check for function key or special key implemented as
* a function key (reboot == f0, tab and back-tab, etc).
*/
if (flags & F) {
#if 0
if (val == 0 && ! up && KBBOOT)
boot ();
#endif
if (! fk_loaded || val >= fnkeys->k_nfkeys)
return;
if ((cp = funkeyp [val]) == NULL) /* has a value? */
return;
while (* cp != DELIM)
isin (* cp ++); /* queue up Fn key value */
return;
}
/*
* Normal key processing.
*/
isin (val); /* send the char */
}
/**
*
* void
* isbatch () -- raw input conversion routine
*
* Action: Enable the video display.
* Canonize the raw input silo.
*
* Notes: isbatch () was scheduled as a deferred process by nkbintr ().
*/
static void
isbatch (tp)
TTY * tp;
{
int c;
static int lastc;
/*
* Ensure video display is enabled.
*/
mm_von ();
isbusy = 0;
/*
* Process all cached characters.
*/
while (in_silo.si_ix != in_silo.si_ox) {
/*
* Get next cached char.
*/
c = in_silo.si_buf [in_silo.si_ox];
if (in_silo.si_ox >= sizeof (in_silo.si_buf) - 1)
in_silo.si_ox = 0;
else
in_silo.si_ox ++;
if (islock == 0 || _IS_INTERRUPT_CHAR (tp, c) ||
_IS_QUIT_CHAR (tp, c)) {
ttin (tp, c);
} else if ((c == 'b') && lastc == ESCAPE_CHAR) {
islock = 0;
ttin (tp, lastc);
ttin (tp, c);
} else if ((c == 'c') && lastc == ESCAPE_CHAR) {
ttin (tp, lastc);
ttin (tp, c);
} else
putchar ('\a');
lastc = c;
}
}
/*
* Receive interrupt.
*/
void
nkbintr ()
{
unsigned c;
unsigned r;
static char keyup;
/*
* Schedule raw input handler if not already active.
*/
if (! isbusy) {
defer (isbatch, & istty);
isbusy = 1;
}
/*
* Pull character from the data
* port. Pulse the KBFLAG in the control
* port to reset the data buffer.
*/
r = inb (KBDATA) & 0xFF;
c = inb (KBCTRL);
outb (KBCTRL, c | KBFLAG);
outb (KBCTRL, c);
/*
* check returned value from keyboard to see if it's a command
* or status back to us. If not, it we assume that it's a key code.
*/
KBDEBUG2 (" intr (%x)", r);
if (! xlate) switch (r) {
case K_BAT_BAD:
printf ("kb: keyboard BAT failed\n");
break;
case K_RESEND:
KBDEBUG ("\nkb: request to resend command\n");
outb (KBDATA, prev_cmd);
break;
case K_OVERRUN_23:
printf ("kb: keyboard buffer overrun\n");
break;
case K_ACK:
/*
* we received an ACKnowledgement from the keyboard.
* advance the state machine and continue.
*/
KBDEBUG (" ACK ");
switch (kbstate) {
case KB_IDLE: /* shouldn't happen */
#if 0
printf ("nkb: ACK while idle\n");
#endif
break;
case KB_SINGLE: /* done with 1-byte command */
case KB_DOUBLE_2: /* done w / 2nd of 2-byte cmd */
kbstate = KB_IDLE;
wakeup (& kbstate);
break;
case KB_DOUBLE_1:
kbstate = KB_DOUBLE_2;
outb (KBDATA, cmd2);
break;
default:
printf ("kb: bad kbstate %d\n", kbstate);
break;
}
break;
default:
isin (r);
break;
} else switch (r) {
case K_BREAK:
keyup = 1; /* key going up */
break;
case K_ECHO_R:
case K_BAT_OK:
break; /* very nice, but ignored */
case K_BAT_BAD:
printf ("kb: keyboard BAT failed\n");
break;
case K_RESEND:
KBDEBUG ("\nkb: request to resend command\n");
outb (KBDATA, prev_cmd);
break;
case K_OVERRUN_23:
printf ("kb: keyboard buffer overrun\n");
break;
case K_ACK:
/*
* we received an ACKnowledgement from the keyboard.
* advance the state machine and continue.
*/
KBDEBUG (" ACK");
switch (kbstate) {
case KB_IDLE: /* shouldn't happen */
#if 0
printf ("kb: ACK while keyboard idle\n");
#endif
break;
case KB_SINGLE: /* done with 1-byte command */
case KB_DOUBLE_2: /* done w / 2nd of 2-byte cmd */
kbstate = KB_IDLE;
wakeup (& kbstate);
break;
case KB_DOUBLE_1:
kbstate = KB_DOUBLE_2;
outb (KBDATA, cmd2);
break;
default:
printf ("kb: bad kbstate %d\n", kbstate);
break;
}
break;
default:
process_key (r, keyup);
keyup = 0;
}
}
/**
*
* void
* ismmfunc (c) -- process keyboard related output escape sequences
* char c;
*/
void
ismmfunc (c)
int c;
{
switch (c) {
case 't': /* Enter numlock */
shift |= (1 << num);
updleds (); /* update LED status */
break;
case 'u': /* Leave numlock */
shift &= ~ (1 << num);
updleds (); /* update LED status */
break;
case '=': /* Enter alternate keypad -- ignored */
case '>': /* Exit alternate keypad -- ignored */
break;
case 'c': /* Reset terminal */
islock = 0;
break;
}
}
/*
* unlock the scroll in case an interrupt character is received
*/
void
kbunscroll ()
{
shift &= ~(1 << scroll);
updleds ();
}
/*
* Configuration table.
*/
CON nkbcon ={
DFCHR | DFPOL, /* Flags */
KB_MAJOR, /* Major index */
isopen, /* Open */
isclose, /* Close */
NULL, /* Block */
isread, /* Read */
mmwrite, /* Write */
isioctl, /* Ioctl */
NULL, /* Powerfail */
mmwatch, /* Timeout */
isload, /* Load */
isuload, /* Unload */
ispoll /* Poll */
};