v4.19.13 snapshot.
diff --git a/include/sound/info.h b/include/sound/info.h
new file mode 100644
index 0000000..becdf66
--- /dev/null
+++ b/include/sound/info.h
@@ -0,0 +1,215 @@
+#ifndef __SOUND_INFO_H
+#define __SOUND_INFO_H
+
+/*
+ * Header file for info interface
+ * 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/poll.h>
+#include <linux/seq_file.h>
+#include <sound/core.h>
+
+/* buffer for information */
+struct snd_info_buffer {
+ char *buffer; /* pointer to begin of buffer */
+ unsigned int curr; /* current position in buffer */
+ unsigned int size; /* current size */
+ unsigned int len; /* total length of buffer */
+ int stop; /* stop flag */
+ int error; /* error code */
+};
+
+#define SNDRV_INFO_CONTENT_TEXT 0
+#define SNDRV_INFO_CONTENT_DATA 1
+
+struct snd_info_entry;
+
+struct snd_info_entry_text {
+ void (*read)(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer);
+ void (*write)(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer);
+};
+
+struct snd_info_entry_ops {
+ int (*open)(struct snd_info_entry *entry,
+ unsigned short mode, void **file_private_data);
+ int (*release)(struct snd_info_entry *entry,
+ unsigned short mode, void *file_private_data);
+ ssize_t (*read)(struct snd_info_entry *entry, void *file_private_data,
+ struct file *file, char __user *buf,
+ size_t count, loff_t pos);
+ ssize_t (*write)(struct snd_info_entry *entry, void *file_private_data,
+ struct file *file, const char __user *buf,
+ size_t count, loff_t pos);
+ loff_t (*llseek)(struct snd_info_entry *entry,
+ void *file_private_data, struct file *file,
+ loff_t offset, int orig);
+ __poll_t (*poll)(struct snd_info_entry *entry,
+ void *file_private_data, struct file *file,
+ poll_table *wait);
+ int (*ioctl)(struct snd_info_entry *entry, void *file_private_data,
+ struct file *file, unsigned int cmd, unsigned long arg);
+ int (*mmap)(struct snd_info_entry *entry, void *file_private_data,
+ struct inode *inode, struct file *file,
+ struct vm_area_struct *vma);
+};
+
+struct snd_info_entry {
+ const char *name;
+ umode_t mode;
+ long size;
+ unsigned short content;
+ union {
+ struct snd_info_entry_text text;
+ struct snd_info_entry_ops *ops;
+ } c;
+ struct snd_info_entry *parent;
+ struct snd_card *card;
+ struct module *module;
+ void *private_data;
+ void (*private_free)(struct snd_info_entry *entry);
+ struct proc_dir_entry *p;
+ struct mutex access;
+ struct list_head children;
+ struct list_head list;
+};
+
+#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_SND_PROC_FS)
+int snd_info_minor_register(void);
+#else
+#define snd_info_minor_register() 0
+#endif
+
+
+#ifdef CONFIG_SND_PROC_FS
+
+extern struct snd_info_entry *snd_seq_root;
+#ifdef CONFIG_SND_OSSEMUL
+extern struct snd_info_entry *snd_oss_root;
+void snd_card_info_read_oss(struct snd_info_buffer *buffer);
+#else
+#define snd_oss_root NULL
+static inline void snd_card_info_read_oss(struct snd_info_buffer *buffer) {}
+#endif
+
+/**
+ * snd_iprintf - printf on the procfs buffer
+ * @buf: the procfs buffer
+ * @fmt: the printf format
+ *
+ * Outputs the string on the procfs buffer just like printf().
+ *
+ * Return: zero for success, or a negative error code.
+ */
+#define snd_iprintf(buf, fmt, args...) \
+ seq_printf((struct seq_file *)(buf)->buffer, fmt, ##args)
+
+int snd_info_init(void);
+int snd_info_done(void);
+
+int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len);
+const char *snd_info_get_str(char *dest, const char *src, int len);
+struct snd_info_entry *snd_info_create_module_entry(struct module *module,
+ const char *name,
+ struct snd_info_entry *parent);
+struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card,
+ const char *name,
+ struct snd_info_entry *parent);
+void snd_info_free_entry(struct snd_info_entry *entry);
+int snd_info_store_text(struct snd_info_entry *entry);
+int snd_info_restore_text(struct snd_info_entry *entry);
+
+int snd_info_card_create(struct snd_card *card);
+int snd_info_card_register(struct snd_card *card);
+int snd_info_card_free(struct snd_card *card);
+void snd_info_card_disconnect(struct snd_card *card);
+void snd_info_card_id_change(struct snd_card *card);
+int snd_info_register(struct snd_info_entry *entry);
+
+/* for card drivers */
+static inline int snd_card_proc_new(struct snd_card *card, const char *name,
+ struct snd_info_entry **entryp)
+{
+ *entryp = snd_info_create_card_entry(card, name, card->proc_root);
+ return *entryp ? 0 : -ENOMEM;
+}
+
+static inline void snd_info_set_text_ops(struct snd_info_entry *entry,
+ void *private_data,
+ void (*read)(struct snd_info_entry *, struct snd_info_buffer *))
+{
+ entry->private_data = private_data;
+ entry->c.text.read = read;
+}
+
+int snd_info_check_reserved_words(const char *str);
+
+#else
+
+#define snd_seq_root NULL
+#define snd_oss_root NULL
+
+static inline int snd_iprintf(struct snd_info_buffer *buffer, char *fmt, ...) { return 0; }
+static inline int snd_info_init(void) { return 0; }
+static inline int snd_info_done(void) { return 0; }
+
+static inline int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len) { return 0; }
+static inline char *snd_info_get_str(char *dest, char *src, int len) { return NULL; }
+static inline struct snd_info_entry *snd_info_create_module_entry(struct module *module, const char *name, struct snd_info_entry *parent) { return NULL; }
+static inline struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card, const char *name, struct snd_info_entry *parent) { return NULL; }
+static inline void snd_info_free_entry(struct snd_info_entry *entry) { ; }
+
+static inline int snd_info_card_create(struct snd_card *card) { return 0; }
+static inline int snd_info_card_register(struct snd_card *card) { return 0; }
+static inline int snd_info_card_free(struct snd_card *card) { return 0; }
+static inline void snd_info_card_disconnect(struct snd_card *card) { }
+static inline void snd_info_card_id_change(struct snd_card *card) { }
+static inline int snd_info_register(struct snd_info_entry *entry) { return 0; }
+
+static inline int snd_card_proc_new(struct snd_card *card, const char *name,
+ struct snd_info_entry **entryp) { return -EINVAL; }
+static inline void snd_info_set_text_ops(struct snd_info_entry *entry __attribute__((unused)),
+ void *private_data,
+ void (*read)(struct snd_info_entry *, struct snd_info_buffer *)) {}
+static inline int snd_info_check_reserved_words(const char *str) { return 1; }
+
+#endif
+
+/*
+ * OSS info part
+ */
+
+#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_SND_PROC_FS)
+
+#define SNDRV_OSS_INFO_DEV_AUDIO 0
+#define SNDRV_OSS_INFO_DEV_SYNTH 1
+#define SNDRV_OSS_INFO_DEV_MIDI 2
+#define SNDRV_OSS_INFO_DEV_TIMERS 4
+#define SNDRV_OSS_INFO_DEV_MIXERS 5
+
+#define SNDRV_OSS_INFO_DEV_COUNT 6
+
+int snd_oss_info_register(int dev, int num, char *string);
+#define snd_oss_info_unregister(dev, num) snd_oss_info_register(dev, num, NULL)
+
+#endif /* CONFIG_SND_OSSEMUL && CONFIG_SND_PROC_FS */
+
+#endif /* __SOUND_INFO_H */