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/*
* Copyright (c) 2006 Alexey Vatchenko <avv@mail.zp.ua>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Processing of special key symbols.
*/
#include "audio.h" /* NAUDIO (mixer tuning) */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kthread.h>
#include <sys/proc.h>
#include <dev/wscons/wsksymdef.h>
#include <dev/wscons/wsksymvar.h>
#define WSKBD_HOTKEY_MAXEVENTS 8
static keysym_t ksym_queue[WSKBD_HOTKEY_MAXEVENTS];
static u_int queue_head, queue_tail;
static struct simplelock queue_lock;
static int wskbd_hotkey_initted = 0;
void init_hotkey_thread(void *);
void hotkey_thread(void *);
void process_hotkey(keysym_t);
int wskbd_hotkey_get(keysym_t *);
#if NAUDIO > 0
extern int wskbd_set_mixervolume(int dir);
#endif
/* ARGSUSED */
void
init_hotkey_thread(void *ctx)
{
int error;
error = kthread_create(hotkey_thread, ctx, NULL, "wskbd_hotkey");
#ifdef DIAGNOSTIC
if (error != 0)
printf("init_hotkey_thread: cannot create process\n");
#endif
}
/* ARGSUSED */
void
hotkey_thread(void *ctx)
{
keysym_t sym;
int error;
for (;;) {
error = wskbd_hotkey_get(&sym);
if (error == 0)
process_hotkey(sym);
else
(void) tsleep(ksym_queue, PZERO, "wait", 0);
}
/* NOTREACHED */
}
void
process_hotkey(keysym_t sym)
{
/* Process Audio tuning keys */
switch (sym) {
#if NAUDIO > 0
case KS_AudioMute:
(void) wskbd_set_mixervolume(0);
break;
case KS_AudioLower:
(void) wskbd_set_mixervolume(-1);
break;
case KS_AudioRaise:
(void) wskbd_set_mixervolume(1);
break;
#endif
default:
#ifdef DEBUG
printf("process_hotkey: unsupported hotkey\n");
#endif
break;
}
}
void
wskbd_hotkey_init(void)
{
if (wskbd_hotkey_initted == 0) {
simple_lock_init(&queue_lock);
queue_head = queue_tail = 0;
kthread_create_deferred(init_hotkey_thread, NULL);
wskbd_hotkey_initted = 1;
}
}
void
wskbd_hotkey_put(keysym_t sym)
{
int s, changed;
u_int nxtpos;
changed = 0;
s = spltty();
simple_lock(&queue_lock);
nxtpos = (queue_head + 1) % WSKBD_HOTKEY_MAXEVENTS;
if (nxtpos != queue_tail) {
ksym_queue[queue_head] = sym;
queue_head = nxtpos;
changed = 1;
}
#ifdef DEBUG
else
printf("wskbd_hotkey_put: losing hotkey\n");
#endif
simple_unlock(&queue_lock);
splx(s);
if (changed != 0)
wakeup(ksym_queue);
}
int
wskbd_hotkey_get(keysym_t *sym)
{
int s, error;
s = spltty();
simple_lock(&queue_lock);
error = 0;
if (queue_head != queue_tail) {
*sym = ksym_queue[queue_tail];
queue_tail = (queue_tail + 1) % WSKBD_HOTKEY_MAXEVENTS;
} else
error = EAGAIN;
simple_unlock(&queue_lock);
splx(s);
return (error);
}
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