linux_dsm_epyc7002/sound/isa/gus/gus_timer.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

189 lines
4.5 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Routines for Gravis UltraSound soundcards - Timers
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
* GUS have similar timers as AdLib (OPL2/OPL3 chips).
*/
#include <linux/time.h>
#include <sound/core.h>
#include <sound/gus.h>
/*
* Timer 1 - 80us
*/
static int snd_gf1_timer1_start(struct snd_timer * timer)
{
unsigned long flags;
unsigned char tmp;
unsigned int ticks;
struct snd_gus_card *gus;
gus = snd_timer_chip(timer);
spin_lock_irqsave(&gus->reg_lock, flags);
ticks = timer->sticks;
tmp = (gus->gf1.timer_enabled |= 4);
snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_1, 256 - ticks); /* timer 1 count */
snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* enable timer 1 IRQ */
snd_gf1_adlib_write(gus, 0x04, tmp >> 2); /* timer 2 start */
spin_unlock_irqrestore(&gus->reg_lock, flags);
return 0;
}
static int snd_gf1_timer1_stop(struct snd_timer * timer)
{
unsigned long flags;
unsigned char tmp;
struct snd_gus_card *gus;
gus = snd_timer_chip(timer);
spin_lock_irqsave(&gus->reg_lock, flags);
tmp = (gus->gf1.timer_enabled &= ~4);
snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* disable timer #1 */
spin_unlock_irqrestore(&gus->reg_lock, flags);
return 0;
}
/*
* Timer 2 - 320us
*/
static int snd_gf1_timer2_start(struct snd_timer * timer)
{
unsigned long flags;
unsigned char tmp;
unsigned int ticks;
struct snd_gus_card *gus;
gus = snd_timer_chip(timer);
spin_lock_irqsave(&gus->reg_lock, flags);
ticks = timer->sticks;
tmp = (gus->gf1.timer_enabled |= 8);
snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_2, 256 - ticks); /* timer 2 count */
snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* enable timer 2 IRQ */
snd_gf1_adlib_write(gus, 0x04, tmp >> 2); /* timer 2 start */
spin_unlock_irqrestore(&gus->reg_lock, flags);
return 0;
}
static int snd_gf1_timer2_stop(struct snd_timer * timer)
{
unsigned long flags;
unsigned char tmp;
struct snd_gus_card *gus;
gus = snd_timer_chip(timer);
spin_lock_irqsave(&gus->reg_lock, flags);
tmp = (gus->gf1.timer_enabled &= ~8);
snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* disable timer #1 */
spin_unlock_irqrestore(&gus->reg_lock, flags);
return 0;
}
/*
*/
static void snd_gf1_interrupt_timer1(struct snd_gus_card * gus)
{
struct snd_timer *timer = gus->gf1.timer1;
if (timer == NULL)
return;
snd_timer_interrupt(timer, timer->sticks);
}
static void snd_gf1_interrupt_timer2(struct snd_gus_card * gus)
{
struct snd_timer *timer = gus->gf1.timer2;
if (timer == NULL)
return;
snd_timer_interrupt(timer, timer->sticks);
}
/*
*/
static struct snd_timer_hardware snd_gf1_timer1 =
{
.flags = SNDRV_TIMER_HW_STOP,
.resolution = 80000,
.ticks = 256,
.start = snd_gf1_timer1_start,
.stop = snd_gf1_timer1_stop,
};
static struct snd_timer_hardware snd_gf1_timer2 =
{
.flags = SNDRV_TIMER_HW_STOP,
.resolution = 320000,
.ticks = 256,
.start = snd_gf1_timer2_start,
.stop = snd_gf1_timer2_stop,
};
static void snd_gf1_timer1_free(struct snd_timer *timer)
{
struct snd_gus_card *gus = timer->private_data;
gus->gf1.timer1 = NULL;
}
static void snd_gf1_timer2_free(struct snd_timer *timer)
{
struct snd_gus_card *gus = timer->private_data;
gus->gf1.timer2 = NULL;
}
void snd_gf1_timers_init(struct snd_gus_card * gus)
{
struct snd_timer *timer;
struct snd_timer_id tid;
if (gus->gf1.timer1 != NULL || gus->gf1.timer2 != NULL)
return;
gus->gf1.interrupt_handler_timer1 = snd_gf1_interrupt_timer1;
gus->gf1.interrupt_handler_timer2 = snd_gf1_interrupt_timer2;
tid.dev_class = SNDRV_TIMER_CLASS_CARD;
tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
tid.card = gus->card->number;
tid.device = gus->timer_dev;
tid.subdevice = 0;
if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) {
strcpy(timer->name, "GF1 timer #1");
timer->private_data = gus;
timer->private_free = snd_gf1_timer1_free;
timer->hw = snd_gf1_timer1;
}
gus->gf1.timer1 = timer;
tid.device++;
if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) {
strcpy(timer->name, "GF1 timer #2");
timer->private_data = gus;
timer->private_free = snd_gf1_timer2_free;
timer->hw = snd_gf1_timer2;
}
gus->gf1.timer2 = timer;
}
void snd_gf1_timers_done(struct snd_gus_card * gus)
{
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_TIMER1 | SNDRV_GF1_HANDLER_TIMER2);
if (gus->gf1.timer1) {
snd_device_free(gus->card, gus->gf1.timer1);
gus->gf1.timer1 = NULL;
}
if (gus->gf1.timer2) {
snd_device_free(gus->card, gus->gf1.timer2);
gus->gf1.timer2 = NULL;
}
}