tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Information interface for ALSA driver
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#include <linux/slab.h>
23#include <linux/time.h>
24#include <linux/string.h>
25#include <linux/export.h>
26#include <sound/core.h>
27#include <sound/minors.h>
28#include <sound/info.h>
29#include <sound/version.h>
30#include <linux/utsname.h>
31#include <linux/mutex.h>
32
33#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
34
35/*
36 * OSS compatible part
37 */
38
39static DEFINE_MUTEX(strings);
40static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
41static struct snd_info_entry *snd_sndstat_proc_entry;
42
43int snd_oss_info_register(int dev, int num, char *string)
44{
45 char *x;
46
47 if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
48 return -ENXIO;
49 if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
50 return -ENXIO;
51 mutex_lock(&strings);
52 if (string == NULL) {
53 if ((x = snd_sndstat_strings[num][dev]) != NULL) {
54 kfree(x);
55 x = NULL;
56 }
57 } else {
58 x = kstrdup(string, GFP_KERNEL);
59 if (x == NULL) {
60 mutex_unlock(&strings);
61 return -ENOMEM;
62 }
63 }
64 snd_sndstat_strings[num][dev] = x;
65 mutex_unlock(&strings);
66 return 0;
67}
68
69EXPORT_SYMBOL(snd_oss_info_register);
70
71static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
72{
73 int idx, ok = -1;
74 char *str;
75
76 snd_iprintf(buf, "\n%s:", id);
77 mutex_lock(&strings);
78 for (idx = 0; idx < SNDRV_CARDS; idx++) {
79 str = snd_sndstat_strings[idx][dev];
80 if (str) {
81 if (ok < 0) {
82 snd_iprintf(buf, "\n");
83 ok++;
84 }
85 snd_iprintf(buf, "%i: %s\n", idx, str);
86 }
87 }
88 mutex_unlock(&strings);
89 if (ok < 0)
90 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
91 return ok;
92}
93
94static void snd_sndstat_proc_read(struct snd_info_entry *entry,
95 struct snd_info_buffer *buffer)
96{
97 snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA v" CONFIG_SND_VERSION " emulation code)\n");
98 snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
99 init_utsname()->sysname,
100 init_utsname()->nodename,
101 init_utsname()->release,
102 init_utsname()->version,
103 init_utsname()->machine);
104 snd_iprintf(buffer, "Config options: 0\n");
105 snd_iprintf(buffer, "\nInstalled drivers: \n");
106 snd_iprintf(buffer, "Type 10: ALSA emulation\n");
107 snd_iprintf(buffer, "\nCard config: \n");
108 snd_card_info_read_oss(buffer);
109 snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO);
110 snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH);
111 snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI);
112 snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS);
113 snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
114}
115
116int snd_info_minor_register(void)
117{
118 struct snd_info_entry *entry;
119
120 memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
121 if ((entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", snd_oss_root)) != NULL) {
122 entry->c.text.read = snd_sndstat_proc_read;
123 if (snd_info_register(entry) < 0) {
124 snd_info_free_entry(entry);
125 entry = NULL;
126 }
127 }
128 snd_sndstat_proc_entry = entry;
129 return 0;
130}
131
132int snd_info_minor_unregister(void)
133{
134 snd_info_free_entry(snd_sndstat_proc_entry);
135 snd_sndstat_proc_entry = NULL;
136 return 0;
137}
138
139#endif /* CONFIG_SND_OSSEMUL */