1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ALSA sequencer /proc interface 4 * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> 5 */ 6 7 #include <linux/init.h> 8 #include <linux/export.h> 9 #include <sound/core.h> 10 11 #include "seq_info.h" 12 #include "seq_clientmgr.h" 13 #include "seq_timer.h" 14 15 static struct snd_info_entry *queues_entry; 16 static struct snd_info_entry *clients_entry; 17 static struct snd_info_entry *timer_entry; 18 19 20 static struct snd_info_entry * __init 21 create_info_entry(char *name, void (*read)(struct snd_info_entry *, 22 struct snd_info_buffer *)) 23 { 24 struct snd_info_entry *entry; 25 26 entry = snd_info_create_module_entry(THIS_MODULE, name, snd_seq_root); 27 if (entry == NULL) 28 return NULL; 29 entry->content = SNDRV_INFO_CONTENT_TEXT; 30 entry->c.text.read = read; 31 if (snd_info_register(entry) < 0) { 32 snd_info_free_entry(entry); 33 return NULL; 34 } 35 return entry; 36 } 37 38 void snd_seq_info_done(void) 39 { 40 snd_info_free_entry(queues_entry); 41 snd_info_free_entry(clients_entry); 42 snd_info_free_entry(timer_entry); 43 } 44 45 /* create all our /proc entries */ 46 int __init snd_seq_info_init(void) 47 { 48 queues_entry = create_info_entry("queues", 49 snd_seq_info_queues_read); 50 clients_entry = create_info_entry("clients", 51 snd_seq_info_clients_read); 52 timer_entry = create_info_entry("timer", snd_seq_info_timer_read); 53 if (!queues_entry || !clients_entry || !timer_entry) 54 goto error; 55 return 0; 56 57 error: 58 snd_seq_info_done(); 59 return -ENOMEM; 60 } 61