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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Simple beeper support for PC platform, using standard timer 2 beeper.
* Eventually this should probably be in a driver.
*/
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/beep.h>
#include <sys/ksynch.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/errno.h>
#include <sys/inttypes.h>
#define NELEM(a) (sizeof (a) / sizeof ((a)[0]))
#define TIMER 0x40
#define TIMERCR (TIMER+3)
#define TIMER2 (TIMER+2)
#define TONE_CTL 0x61
#define T_CTLWORD 0xB6
#define TONE_ON 0x03
static struct beep_state {
enum {BEEP_OFF, BEEP_TIMED, BEEP_ON} state;
kmutex_t mutex;
} beep_state;
static void beep_end(void *);
static void beep_on(void);
static void beep_off(void);
static void beep_frequency(int frequency);
struct beep_params {
enum beep_type type;
int frequency; /* Hz */
int duration; /* milliseconds */
};
struct beep_params beep_params[] = {
{ BEEP_CONSOLE, 900, 200 },
{ BEEP_TYPE4, 2000, 0 },
{ BEEP_DEFAULT, 1000, 200 } /* Must be last */
};
/* ARGSUSED */
void
beep(enum beep_type type)
{
struct beep_params *bp;
/*
* In the fullness of time, we would use the "type" argument
* to determine frequency, volume, duration, waveform, sample
* to be played, ...
*/
for (bp = beep_params; bp->type != BEEP_DEFAULT; bp++) {
if (bp->type == type)
break;
}
mutex_enter(&beep_state.mutex);
if (beep_state.state == BEEP_OFF && bp->frequency != 0) {
beep_state.state = BEEP_TIMED;
beep_frequency(bp->frequency);
beep_on();
(void) timeout(beep_end, &beep_state,
drv_usectohz(bp->duration*1000));
}
mutex_exit(&beep_state.mutex);
}
/* ARGSUSED */
void
beep_polled(enum beep_type type)
{
/* No-op at this time */
}
static void
beep_end(void *arg)
{
struct beep_state *state = arg;
/* Perhaps we should enforce a small "quiet" period between beeps. */
mutex_enter(&state->mutex);
state->state = BEEP_OFF;
beep_off();
mutex_exit(&state->mutex);
}
static void
beep_frequency(int frequency)
{
int counter;
counter = 1193180 / frequency;
if (counter > 65535)
counter = 65535;
else if (counter < 1)
counter = 1;
outb(TIMERCR, T_CTLWORD);
outb(TIMER2, counter & 0xff);
outb(TIMER2, counter >> 8);
}
static void
beep_on(void)
{
outb(TONE_CTL, inb(TONE_CTL) | TONE_ON);
}
static void
beep_off(void)
{
outb(TONE_CTL, inb(TONE_CTL) & ~TONE_ON);
}
void
beeper_on(enum beep_type type)
{
struct beep_params *bp;
for (bp = beep_params; bp->type != BEEP_DEFAULT; bp++) {
if (bp->type == type)
break;
}
mutex_enter(&beep_state.mutex);
if (beep_state.state == BEEP_OFF) {
beep_state.state = BEEP_ON;
if (bp->frequency != 0) {
beep_frequency(bp->frequency);
beep_on();
}
}
mutex_exit(&beep_state.mutex);
}
void
beeper_off()
{
mutex_enter(&beep_state.mutex);
if (beep_state.state == BEEP_ON) {
beep_state.state = BEEP_OFF;
beep_off();
}
mutex_exit(&beep_state.mutex);
}
int
beeper_freq(enum beep_type type, int freq)
{
struct beep_params *bp;
/*
* The frequency value is limited to the range of [0 - 32767]
*/
if ((type != BEEP_CONSOLE && type != BEEP_TYPE4) || freq < 0 ||
freq > INT16_MAX)
return (EINVAL);
for (bp = beep_params; bp->type != BEEP_DEFAULT; bp++) {
if (bp->type == type)
break;
}
bp->frequency = freq;
return (0);
}
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