mirror of
https://github.com/torvalds/linux.git
synced 2024-12-13 14:43:03 +00:00
6d68d9cba1
- Remove the "log-like" parts, following the same logic as the previous commit - Unify format - Add missing major contributors, including myself - Sort entries in order of first contribution (Creative comes last for optical reasons; they don't appear to have directly contributed anyway) Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de> Link: https://lore.kernel.org/r/20230715160839.326978-2-oswald.buddenhagen@gmx.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) by Lee Revell <rlrevell@joe-job.com>
|
|
* Clemens Ladisch <clemens@ladisch.de>
|
|
* Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
|
|
*
|
|
* Routines for control of EMU10K1 chips
|
|
*/
|
|
|
|
#include <linux/time.h>
|
|
#include <sound/core.h>
|
|
#include <sound/emu10k1.h>
|
|
|
|
static int snd_emu10k1_timer_start(struct snd_timer *timer)
|
|
{
|
|
struct snd_emu10k1 *emu;
|
|
unsigned int delay;
|
|
|
|
emu = snd_timer_chip(timer);
|
|
delay = timer->sticks - 1;
|
|
if (delay < 5 ) /* minimum time is 5 ticks */
|
|
delay = 5;
|
|
snd_emu10k1_intr_enable(emu, INTE_INTERVALTIMERENB);
|
|
outw(delay & TIMER_RATE_MASK, emu->port + TIMER);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_emu10k1_timer_stop(struct snd_timer *timer)
|
|
{
|
|
struct snd_emu10k1 *emu;
|
|
|
|
emu = snd_timer_chip(timer);
|
|
snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB);
|
|
return 0;
|
|
}
|
|
|
|
static unsigned long snd_emu10k1_timer_c_resolution(struct snd_timer *timer)
|
|
{
|
|
struct snd_emu10k1 *emu = snd_timer_chip(timer);
|
|
|
|
if (emu->card_capabilities->emu_model &&
|
|
emu->emu1010.word_clock == 44100)
|
|
return 22676; // 1 sample @ 44.1 kHz = 22.675736...us
|
|
else
|
|
return 20833; // 1 sample @ 48 kHz = 20.833...us
|
|
}
|
|
|
|
static int snd_emu10k1_timer_precise_resolution(struct snd_timer *timer,
|
|
unsigned long *num, unsigned long *den)
|
|
{
|
|
struct snd_emu10k1 *emu = snd_timer_chip(timer);
|
|
|
|
*num = 1;
|
|
if (emu->card_capabilities->emu_model)
|
|
*den = emu->emu1010.word_clock;
|
|
else
|
|
*den = 48000;
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_timer_hardware snd_emu10k1_timer_hw = {
|
|
.flags = SNDRV_TIMER_HW_AUTO,
|
|
.ticks = 1024,
|
|
.start = snd_emu10k1_timer_start,
|
|
.stop = snd_emu10k1_timer_stop,
|
|
.c_resolution = snd_emu10k1_timer_c_resolution,
|
|
.precise_resolution = snd_emu10k1_timer_precise_resolution,
|
|
};
|
|
|
|
int snd_emu10k1_timer(struct snd_emu10k1 *emu, int device)
|
|
{
|
|
struct snd_timer *timer = NULL;
|
|
struct snd_timer_id tid;
|
|
int err;
|
|
|
|
tid.dev_class = SNDRV_TIMER_CLASS_CARD;
|
|
tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
|
|
tid.card = emu->card->number;
|
|
tid.device = device;
|
|
tid.subdevice = 0;
|
|
err = snd_timer_new(emu->card, "EMU10K1", &tid, &timer);
|
|
if (err >= 0) {
|
|
strcpy(timer->name, "EMU10K1 timer");
|
|
timer->private_data = emu;
|
|
timer->hw = snd_emu10k1_timer_hw;
|
|
}
|
|
emu->timer = timer;
|
|
return err;
|
|
}
|