From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/sound/core/init.c | 103 ++++++++++++++++++---------------------------------
1 files changed, 36 insertions(+), 67 deletions(-)
diff --git a/kernel/sound/core/init.c b/kernel/sound/core/init.c
index 9e1a3f4..9f5270c 100644
--- a/kernel/sound/core/init.c
+++ b/kernel/sound/core/init.c
@@ -1,22 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Initialization routines
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
- *
- *
- * 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>
@@ -29,6 +14,7 @@
#include <linux/ctype.h>
#include <linux/pm.h>
#include <linux/completion.h>
+#include <linux/interrupt.h>
#include <sound/core.h>
#include <sound/control.h>
@@ -49,8 +35,7 @@
/* locked for registering/using */
static DECLARE_BITMAP(snd_cards_lock, SNDRV_CARDS);
-struct snd_card *snd_cards[SNDRV_CARDS];
-EXPORT_SYMBOL(snd_cards);
+static struct snd_card *snd_cards[SNDRV_CARDS];
static DEFINE_MUTEX(snd_card_mutex);
@@ -98,31 +83,6 @@
#if IS_ENABLED(CONFIG_SND_MIXER_OSS)
int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int free_flag);
EXPORT_SYMBOL(snd_mixer_oss_notify_callback);
-#endif
-
-#ifdef CONFIG_SND_PROC_FS
-static void snd_card_id_read(struct snd_info_entry *entry,
- struct snd_info_buffer *buffer)
-{
- snd_iprintf(buffer, "%s\n", entry->card->id);
-}
-
-static int init_info_for_card(struct snd_card *card)
-{
- struct snd_info_entry *entry;
-
- entry = snd_info_create_card_entry(card, "id", card->proc_root);
- if (!entry) {
- dev_dbg(card->dev, "unable to create card entry\n");
- return -ENOMEM;
- }
- entry->c.text.read = snd_card_id_read;
- card->proc_id = entry;
-
- return snd_info_card_register(card);
-}
-#else /* !CONFIG_SND_PROC_FS */
-#define init_info_for_card(card)
#endif
static int check_empty_slot(struct module *module, int slot)
@@ -244,7 +204,10 @@
mutex_unlock(&snd_card_mutex);
card->dev = parent;
card->number = idx;
+#ifdef MODULE
+ WARN_ON(!module);
card->module = module;
+#endif
INIT_LIST_HEAD(&card->devices);
init_rwsem(&card->controls_rwsem);
rwlock_init(&card->ctl_files_rwlock);
@@ -252,12 +215,13 @@
INIT_LIST_HEAD(&card->ctl_files);
spin_lock_init(&card->files_lock);
INIT_LIST_HEAD(&card->files_list);
+ mutex_init(&card->memory_mutex);
#ifdef CONFIG_PM
init_waitqueue_head(&card->power_sleep);
#endif
init_waitqueue_head(&card->remove_sleep);
+ card->sync_irq = -1;
- init_waitqueue_head(&card->offline_poll_wait);
device_initialize(&card->card_dev);
card->card_dev.parent = parent;
card->card_dev.class = sound_class;
@@ -293,6 +257,26 @@
return err;
}
EXPORT_SYMBOL(snd_card_new);
+
+/**
+ * snd_card_ref - Get the card object from the index
+ * @idx: the card index
+ *
+ * Returns a card object corresponding to the given index or NULL if not found.
+ * Release the object via snd_card_unref().
+ */
+struct snd_card *snd_card_ref(int idx)
+{
+ struct snd_card *card;
+
+ mutex_lock(&snd_card_mutex);
+ card = snd_cards[idx];
+ if (card)
+ get_device(&card->card_dev);
+ mutex_unlock(&snd_card_mutex);
+ return card;
+}
+EXPORT_SYMBOL_GPL(snd_card_ref);
/* return non-zero if a card is already locked */
int snd_card_locked(int card)
@@ -433,6 +417,9 @@
/* notify all devices that we are disconnected */
snd_device_disconnect_all(card);
+ if (card->sync_irq > 0)
+ synchronize_irq(card->sync_irq);
+
snd_info_card_disconnect(card);
if (card->registered) {
device_del(&card->card_dev);
@@ -490,7 +477,6 @@
snd_device_free_all(card);
if (card->private_free)
card->private_free(card);
- snd_info_free_entry(card->proc_id);
if (snd_info_card_free(card) < 0) {
dev_warn(card->dev, "unable to free card info\n");
/* Not fatal error */
@@ -535,10 +521,9 @@
*/
int snd_card_free(struct snd_card *card)
{
- struct completion released;
+ DECLARE_COMPLETION_ONSTACK(released);
int ret;
- init_completion(&released);
card->release_completion = &released;
ret = snd_card_free_when_closed(card);
if (ret)
@@ -794,7 +779,10 @@
}
snd_cards[card->number] = card;
mutex_unlock(&snd_card_mutex);
- init_info_for_card(card);
+ err = snd_info_card_register(card);
+ if (err < 0)
+ return err;
+
#if IS_ENABLED(CONFIG_SND_MIXER_OSS)
if (snd_mixer_oss_notify_callback)
snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER);
@@ -998,25 +986,6 @@
return 0;
}
EXPORT_SYMBOL(snd_card_file_remove);
-
-/**
- * snd_card_change_online_state - mark card's online/offline state
- * @card: Card to mark
- * @online: whether online of offline
- *
- * Mutes the DAI DAC.
- */
-void snd_card_change_online_state(struct snd_card *card, int online)
-{
- snd_printd("snd card %s state change %d -> %d\n",
- card->shortname, !card->offline, online);
- card->offline = !online;
- /* make sure offline is updated prior to wake up */
- wmb();
- xchg(&card->offline_change, 1);
- wake_up_interruptible(&card->offline_poll_wait);
-}
-EXPORT_SYMBOL_GPL(snd_card_change_online_state);
#ifdef CONFIG_PM
/**
--
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