From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/sound/core/info.c | 219 +++++++++++++++++++++++++++++-------------------------
1 files changed, 117 insertions(+), 102 deletions(-)
diff --git a/kernel/sound/core/info.c b/kernel/sound/core/info.c
index eeb74bd..d6fb11c 100644
--- a/kernel/sound/core/info.c
+++ b/kernel/sound/core/info.c
@@ -1,22 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Information interface for ALSA driver
* 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>
@@ -35,7 +20,7 @@
int snd_info_check_reserved_words(const char *str)
{
- static char *reserved[] =
+ static const char * const reserved[] =
{
"version",
"meminfo",
@@ -50,7 +35,7 @@
"seq",
NULL
};
- char **xstr = reserved;
+ const char * const *xstr = reserved;
while (*xstr) {
if (!strcmp(*xstr, str))
@@ -127,9 +112,9 @@
entry = data->entry;
mutex_lock(&entry->access);
if (entry->c.ops->llseek) {
- offset = entry->c.ops->llseek(entry,
- data->file_private_data,
- file, offset, orig);
+ ret = entry->c.ops->llseek(entry,
+ data->file_private_data,
+ file, offset, orig);
goto out;
}
@@ -297,17 +282,16 @@
return 0;
}
-static const struct file_operations snd_info_entry_operations =
+static const struct proc_ops snd_info_entry_operations =
{
- .owner = THIS_MODULE,
- .llseek = snd_info_entry_llseek,
- .read = snd_info_entry_read,
- .write = snd_info_entry_write,
- .poll = snd_info_entry_poll,
- .unlocked_ioctl = snd_info_entry_ioctl,
- .mmap = snd_info_entry_mmap,
- .open = snd_info_entry_open,
- .release = snd_info_entry_release,
+ .proc_lseek = snd_info_entry_llseek,
+ .proc_read = snd_info_entry_read,
+ .proc_write = snd_info_entry_write,
+ .proc_poll = snd_info_entry_poll,
+ .proc_ioctl = snd_info_entry_ioctl,
+ .proc_mmap = snd_info_entry_mmap,
+ .proc_open = snd_info_entry_open,
+ .proc_release = snd_info_entry_release,
};
/*
@@ -436,33 +420,21 @@
return 0;
}
-static const struct file_operations snd_info_text_entry_ops =
+static const struct proc_ops snd_info_text_entry_ops =
{
- .owner = THIS_MODULE,
- .open = snd_info_text_entry_open,
- .release = snd_info_text_entry_release,
- .write = snd_info_text_entry_write,
- .llseek = seq_lseek,
- .read = seq_read,
+ .proc_open = snd_info_text_entry_open,
+ .proc_release = snd_info_text_entry_release,
+ .proc_write = snd_info_text_entry_write,
+ .proc_lseek = seq_lseek,
+ .proc_read = seq_read,
};
-/*
- * snd_info_create_subdir - create and register a subdir for a given parent
- * @mod: the module pointer
- * @name: the module name
- * @parent: the parent directory
- *
- * Creates and registers new subdir entry inside a given parent.
- *
- * Return: The pointer of the new instance, or NULL on failure.
- */
-struct snd_info_entry *snd_info_create_subdir(struct module *mod,
- const char *name,
- struct snd_info_entry *parent)
+static struct snd_info_entry *create_subdir(struct module *mod,
+ const char *name)
{
struct snd_info_entry *entry;
- entry = snd_info_create_module_entry(mod, name, parent);
+ entry = snd_info_create_module_entry(mod, name, NULL);
if (!entry)
return NULL;
entry->mode = S_IFDIR | 0555;
@@ -472,14 +444,14 @@
}
return entry;
}
-EXPORT_SYMBOL(snd_info_create_subdir);
static struct snd_info_entry *
-snd_info_create_entry(const char *name, struct snd_info_entry *parent);
+snd_info_create_entry(const char *name, struct snd_info_entry *parent,
+ struct module *module);
int __init snd_info_init(void)
{
- snd_proc_root = snd_info_create_entry("asound", NULL);
+ snd_proc_root = snd_info_create_entry("asound", NULL, THIS_MODULE);
if (!snd_proc_root)
return -ENOMEM;
snd_proc_root->mode = S_IFDIR | 0555;
@@ -487,12 +459,12 @@
if (!snd_proc_root->p)
goto error;
#ifdef CONFIG_SND_OSSEMUL
- snd_oss_root = snd_info_create_subdir(THIS_MODULE, "oss", NULL);
+ snd_oss_root = create_subdir(THIS_MODULE, "oss");
if (!snd_oss_root)
goto error;
#endif
#if IS_ENABLED(CONFIG_SND_SEQUENCER)
- snd_seq_root = snd_info_create_subdir(THIS_MODULE, "seq", NULL);
+ snd_seq_root = create_subdir(THIS_MODULE, "seq");
if (!snd_seq_root)
goto error;
#endif
@@ -515,6 +487,14 @@
return 0;
}
+static void snd_card_id_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct snd_card *card = entry->private_data;
+
+ snd_iprintf(buffer, "%s\n", card->id);
+}
+
/*
* create a card proc file
* called from init.c
@@ -528,32 +508,12 @@
return -ENXIO;
sprintf(str, "card%i", card->number);
- entry = snd_info_create_subdir(card->module, str, NULL);
+ entry = create_subdir(card->module, str);
if (!entry)
return -ENOMEM;
card->proc_root = entry;
- return 0;
-}
-/* register all pending info entries */
-static int snd_info_register_recursive(struct snd_info_entry *entry)
-{
- struct snd_info_entry *p;
- int err;
-
- if (!entry->p) {
- err = snd_info_register(entry);
- if (err < 0)
- return err;
- }
-
- list_for_each_entry(p, &entry->children, list) {
- err = snd_info_register_recursive(p);
- if (err < 0)
- return err;
- }
-
- return 0;
+ return snd_card_ro_proc_new(card, "id", card, snd_card_id_read);
}
/*
@@ -569,7 +529,7 @@
if (snd_BUG_ON(!card))
return -ENXIO;
- err = snd_info_register_recursive(card->proc_root);
+ err = snd_info_register(card->proc_root);
if (err < 0)
return err;
@@ -631,6 +591,7 @@
return 0;
}
+
/**
* snd_info_get_line - read one line from the procfs buffer
* @buffer: the procfs buffer
@@ -643,7 +604,7 @@
*/
int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len)
{
- int c = -1;
+ int c;
if (snd_BUG_ON(!buffer))
return 1;
@@ -718,7 +679,8 @@
* Return: The pointer of the new instance, or %NULL on failure.
*/
static struct snd_info_entry *
-snd_info_create_entry(const char *name, struct snd_info_entry *parent)
+snd_info_create_entry(const char *name, struct snd_info_entry *parent,
+ struct module *module)
{
struct snd_info_entry *entry;
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
@@ -735,6 +697,7 @@
INIT_LIST_HEAD(&entry->children);
INIT_LIST_HEAD(&entry->list);
entry->parent = parent;
+ entry->module = module;
if (parent) {
mutex_lock(&parent->access);
list_add_tail(&entry->list, &parent->children);
@@ -757,10 +720,9 @@
const char *name,
struct snd_info_entry *parent)
{
- struct snd_info_entry *entry = snd_info_create_entry(name, parent);
- if (entry)
- entry->module = module;
- return entry;
+ if (!parent)
+ parent = snd_proc_root;
+ return snd_info_create_entry(name, parent, module);
}
EXPORT_SYMBOL(snd_info_create_module_entry);
@@ -778,12 +740,9 @@
const char *name,
struct snd_info_entry * parent)
{
- struct snd_info_entry *entry = snd_info_create_entry(name, parent);
- if (entry) {
- entry->module = card->module;
- entry->card = card;
- }
- return entry;
+ if (!parent)
+ parent = card->proc_root;
+ return snd_info_create_entry(name, parent, card->module);
}
EXPORT_SYMBOL(snd_info_create_card_entry);
@@ -834,15 +793,7 @@
}
EXPORT_SYMBOL(snd_info_free_entry);
-/**
- * snd_info_register - register the info entry
- * @entry: the info entry
- *
- * Registers the proc info entry.
- *
- * Return: Zero if successful, or a negative error code on failure.
- */
-int snd_info_register(struct snd_info_entry * entry)
+static int __snd_info_register(struct snd_info_entry *entry)
{
struct proc_dir_entry *root, *p = NULL;
@@ -850,6 +801,8 @@
return -ENXIO;
root = entry->parent == NULL ? snd_proc_root->p : entry->parent->p;
mutex_lock(&info_mutex);
+ if (entry->p || !root)
+ goto unlock;
if (S_ISDIR(entry->mode)) {
p = proc_mkdir_mode(entry->name, entry->mode, root);
if (!p) {
@@ -857,7 +810,7 @@
return -ENOMEM;
}
} else {
- const struct file_operations *ops;
+ const struct proc_ops *ops;
if (entry->content == SNDRV_INFO_CONTENT_DATA)
ops = &snd_info_entry_operations;
else
@@ -871,11 +824,73 @@
proc_set_size(p, entry->size);
}
entry->p = p;
+ unlock:
mutex_unlock(&info_mutex);
return 0;
}
+
+/**
+ * snd_info_register - register the info entry
+ * @entry: the info entry
+ *
+ * Registers the proc info entry.
+ * The all children entries are registered recursively.
+ *
+ * Return: Zero if successful, or a negative error code on failure.
+ */
+int snd_info_register(struct snd_info_entry *entry)
+{
+ struct snd_info_entry *p;
+ int err;
+
+ if (!entry->p) {
+ err = __snd_info_register(entry);
+ if (err < 0)
+ return err;
+ }
+
+ list_for_each_entry(p, &entry->children, list) {
+ err = snd_info_register(p);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
EXPORT_SYMBOL(snd_info_register);
+/**
+ * snd_card_rw_proc_new - Create a read/write text proc file entry for the card
+ * @card: the card instance
+ * @name: the file name
+ * @private_data: the arbitrary private data
+ * @read: the read callback
+ * @write: the write callback, NULL for read-only
+ *
+ * This proc file entry will be registered via snd_card_register() call, and
+ * it will be removed automatically at the card removal, too.
+ */
+int snd_card_rw_proc_new(struct snd_card *card, const char *name,
+ void *private_data,
+ void (*read)(struct snd_info_entry *,
+ struct snd_info_buffer *),
+ void (*write)(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer))
+{
+ struct snd_info_entry *entry;
+
+ entry = snd_info_create_card_entry(card, name, card->proc_root);
+ if (!entry)
+ return -ENOMEM;
+ snd_info_set_text_ops(entry, private_data, read);
+ if (write) {
+ entry->mode |= 0200;
+ entry->c.text.write = write;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_card_rw_proc_new);
+
/*
*/
--
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