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Message-Id: <1461373085-16679-1-git-send-email-alexandre.belloni@free-electrons.com>
Date: Sat, 23 Apr 2016 02:58:05 +0200
From: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To: Takashi Iwai <tiwai@...e.com>, Jaroslav Kysela <perex@...ex.cz>
Cc: Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
alsa-devel@...a-project.org,
Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCH] ALSA: timer: remove legacy rtctimer
There are no users of rtctimer left. Remove its code as this is the
in-kernel user of the legacy PC RTC driver that will hopefully be removed
at some point.
Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
Note that I've kept the definition of SNDRV_TIMER_GLOBAL_RTC as it is exposed to
userspace. USerspace will still properly get -ENODEV when trying to use it (as
if it was compiled out of the kernel anyway).
include/uapi/sound/asound.h | 2 +-
sound/core/Kconfig | 29 -------
sound/core/Makefile | 1 -
sound/core/rtctimer.c | 187 --------------------------------------------
sound/core/seq/seq.c | 2 -
sound/core/timer.c | 2 -
6 files changed, 1 insertion(+), 222 deletions(-)
delete mode 100644 sound/core/rtctimer.c
diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h
index 67bf49d8c944..609cadb8739d 100644
--- a/include/uapi/sound/asound.h
+++ b/include/uapi/sound/asound.h
@@ -672,7 +672,7 @@ enum {
/* global timers (device member) */
#define SNDRV_TIMER_GLOBAL_SYSTEM 0
-#define SNDRV_TIMER_GLOBAL_RTC 1
+#define SNDRV_TIMER_GLOBAL_RTC 1 /* unused */
#define SNDRV_TIMER_GLOBAL_HPET 2
#define SNDRV_TIMER_GLOBAL_HRTIMER 3
diff --git a/sound/core/Kconfig b/sound/core/Kconfig
index 6d12ca9bcb80..9749f9e8b45c 100644
--- a/sound/core/Kconfig
+++ b/sound/core/Kconfig
@@ -141,35 +141,6 @@ config SND_SEQ_HRTIMER_DEFAULT
Say Y here to use the HR-timer backend as the default sequencer
timer.
-config SND_RTCTIMER
- tristate "RTC Timer support"
- depends on RTC
- select SND_TIMER
- help
- Say Y here to enable RTC timer support for ALSA. ALSA uses
- the RTC timer as a precise timing source and maps the RTC
- timer to ALSA's timer interface. The ALSA sequencer code also
- can use this timing source.
-
- To compile this driver as a module, choose M here: the module
- will be called snd-rtctimer.
-
- Note that this option is exclusive with the new RTC drivers
- (CONFIG_RTC_CLASS) since this requires the old API.
-
-config SND_SEQ_RTCTIMER_DEFAULT
- bool "Use RTC as default sequencer timer"
- depends on SND_RTCTIMER && SND_SEQUENCER
- depends on !SND_SEQ_HRTIMER_DEFAULT
- default y
- help
- Say Y here to use the RTC timer as the default sequencer
- timer. This is strongly recommended because it ensures
- precise MIDI timing even when the system timer runs at less
- than 1000 Hz.
-
- If in doubt, say Y.
-
config SND_DYNAMIC_MINORS
bool "Dynamic device file minor numbers"
help
diff --git a/sound/core/Makefile b/sound/core/Makefile
index 48ab4b8f8279..e85d9dd12c2d 100644
--- a/sound/core/Makefile
+++ b/sound/core/Makefile
@@ -37,7 +37,6 @@ obj-$(CONFIG_SND) += snd.o
obj-$(CONFIG_SND_HWDEP) += snd-hwdep.o
obj-$(CONFIG_SND_TIMER) += snd-timer.o
obj-$(CONFIG_SND_HRTIMER) += snd-hrtimer.o
-obj-$(CONFIG_SND_RTCTIMER) += snd-rtctimer.o
obj-$(CONFIG_SND_PCM) += snd-pcm.o
obj-$(CONFIG_SND_DMAENGINE_PCM) += snd-pcm-dmaengine.o
obj-$(CONFIG_SND_RAWMIDI) += snd-rawmidi.o
diff --git a/sound/core/rtctimer.c b/sound/core/rtctimer.c
deleted file mode 100644
index f3420d11a12f..000000000000
--- a/sound/core/rtctimer.c
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
- * RTC based high-frequency timer
- *
- * Copyright (C) 2000 Takashi Iwai
- * based on rtctimer.c by Steve Ratcliffe
- *
- * 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
- *
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/log2.h>
-#include <sound/core.h>
-#include <sound/timer.h>
-
-#if IS_ENABLED(CONFIG_RTC)
-
-#include <linux/mc146818rtc.h>
-
-#define RTC_FREQ 1024 /* default frequency */
-#define NANO_SEC 1000000000L /* 10^9 in sec */
-
-/*
- * prototypes
- */
-static int rtctimer_open(struct snd_timer *t);
-static int rtctimer_close(struct snd_timer *t);
-static int rtctimer_start(struct snd_timer *t);
-static int rtctimer_stop(struct snd_timer *t);
-
-
-/*
- * The hardware dependent description for this timer.
- */
-static struct snd_timer_hardware rtc_hw = {
- .flags = SNDRV_TIMER_HW_AUTO |
- SNDRV_TIMER_HW_FIRST |
- SNDRV_TIMER_HW_TASKLET,
- .ticks = 100000000L, /* FIXME: XXX */
- .open = rtctimer_open,
- .close = rtctimer_close,
- .start = rtctimer_start,
- .stop = rtctimer_stop,
-};
-
-static int rtctimer_freq = RTC_FREQ; /* frequency */
-static struct snd_timer *rtctimer;
-static struct tasklet_struct rtc_tasklet;
-static rtc_task_t rtc_task;
-
-
-static int
-rtctimer_open(struct snd_timer *t)
-{
- int err;
-
- err = rtc_register(&rtc_task);
- if (err < 0)
- return err;
- t->private_data = &rtc_task;
- return 0;
-}
-
-static int
-rtctimer_close(struct snd_timer *t)
-{
- rtc_task_t *rtc = t->private_data;
- if (rtc) {
- rtc_unregister(rtc);
- tasklet_kill(&rtc_tasklet);
- t->private_data = NULL;
- }
- return 0;
-}
-
-static int
-rtctimer_start(struct snd_timer *timer)
-{
- rtc_task_t *rtc = timer->private_data;
- if (snd_BUG_ON(!rtc))
- return -EINVAL;
- rtc_control(rtc, RTC_IRQP_SET, rtctimer_freq);
- rtc_control(rtc, RTC_PIE_ON, 0);
- return 0;
-}
-
-static int
-rtctimer_stop(struct snd_timer *timer)
-{
- rtc_task_t *rtc = timer->private_data;
- if (snd_BUG_ON(!rtc))
- return -EINVAL;
- rtc_control(rtc, RTC_PIE_OFF, 0);
- return 0;
-}
-
-static void rtctimer_tasklet(unsigned long data)
-{
- snd_timer_interrupt((struct snd_timer *)data, 1);
-}
-
-/*
- * interrupt
- */
-static void rtctimer_interrupt(void *private_data)
-{
- tasklet_schedule(private_data);
-}
-
-
-/*
- * ENTRY functions
- */
-static int __init rtctimer_init(void)
-{
- int err;
- struct snd_timer *timer;
-
- if (rtctimer_freq < 2 || rtctimer_freq > 8192 ||
- !is_power_of_2(rtctimer_freq)) {
- pr_err("ALSA: rtctimer: invalid frequency %d\n", rtctimer_freq);
- return -EINVAL;
- }
-
- /* Create a new timer and set up the fields */
- err = snd_timer_global_new("rtc", SNDRV_TIMER_GLOBAL_RTC, &timer);
- if (err < 0)
- return err;
-
- timer->module = THIS_MODULE;
- strcpy(timer->name, "RTC timer");
- timer->hw = rtc_hw;
- timer->hw.resolution = NANO_SEC / rtctimer_freq;
-
- tasklet_init(&rtc_tasklet, rtctimer_tasklet, (unsigned long)timer);
-
- /* set up RTC callback */
- rtc_task.func = rtctimer_interrupt;
- rtc_task.private_data = &rtc_tasklet;
-
- err = snd_timer_global_register(timer);
- if (err < 0) {
- snd_timer_global_free(timer);
- return err;
- }
- rtctimer = timer; /* remember this */
-
- return 0;
-}
-
-static void __exit rtctimer_exit(void)
-{
- if (rtctimer) {
- snd_timer_global_free(rtctimer);
- rtctimer = NULL;
- }
-}
-
-
-/*
- * exported stuff
- */
-module_init(rtctimer_init)
-module_exit(rtctimer_exit)
-
-module_param(rtctimer_freq, int, 0444);
-MODULE_PARM_DESC(rtctimer_freq, "timer frequency in Hz");
-
-MODULE_LICENSE("GPL");
-
-MODULE_ALIAS("snd-timer-" __stringify(SNDRV_TIMER_GLOBAL_RTC));
-
-#endif /* IS_ENABLED(CONFIG_RTC) */
diff --git a/sound/core/seq/seq.c b/sound/core/seq/seq.c
index 7e0aabb808a6..639544b4fb04 100644
--- a/sound/core/seq/seq.c
+++ b/sound/core/seq/seq.c
@@ -47,8 +47,6 @@ int seq_default_timer_card = -1;
int seq_default_timer_device =
#ifdef CONFIG_SND_SEQ_HRTIMER_DEFAULT
SNDRV_TIMER_GLOBAL_HRTIMER
-#elif defined(CONFIG_SND_SEQ_RTCTIMER_DEFAULT)
- SNDRV_TIMER_GLOBAL_RTC
#else
SNDRV_TIMER_GLOBAL_SYSTEM
#endif
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 6469bedda2f3..0cfc028c1193 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -37,8 +37,6 @@
#if IS_ENABLED(CONFIG_SND_HRTIMER)
#define DEFAULT_TIMER_LIMIT 4
-#elif IS_ENABLED(CONFIG_SND_RTCTIMER)
-#define DEFAULT_TIMER_LIMIT 2
#else
#define DEFAULT_TIMER_LIMIT 1
#endif
--
2.8.0.rc3
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