Root/sound/core/info_oss.c

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 <sound/core.h>
26#include <sound/minors.h>
27#include <sound/info.h>
28#include <sound/version.h>
29#include <linux/utsname.h>
30#include <linux/mutex.h>
31
32#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
33
34/*
35 * OSS compatible part
36 */
37
38static DEFINE_MUTEX(strings);
39static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
40static struct snd_info_entry *snd_sndstat_proc_entry;
41
42int snd_oss_info_register(int dev, int num, char *string)
43{
44    char *x;
45
46    if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
47        return -ENXIO;
48    if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
49        return -ENXIO;
50    mutex_lock(&strings);
51    if (string == NULL) {
52        if ((x = snd_sndstat_strings[num][dev]) != NULL) {
53            kfree(x);
54            x = NULL;
55        }
56    } else {
57        x = kstrdup(string, GFP_KERNEL);
58        if (x == NULL) {
59            mutex_unlock(&strings);
60            return -ENOMEM;
61        }
62    }
63    snd_sndstat_strings[num][dev] = x;
64    mutex_unlock(&strings);
65    return 0;
66}
67
68EXPORT_SYMBOL(snd_oss_info_register);
69
70static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
71{
72    int idx, ok = -1;
73    char *str;
74
75    snd_iprintf(buf, "\n%s:", id);
76    mutex_lock(&strings);
77    for (idx = 0; idx < SNDRV_CARDS; idx++) {
78        str = snd_sndstat_strings[idx][dev];
79        if (str) {
80            if (ok < 0) {
81                snd_iprintf(buf, "\n");
82                ok++;
83            }
84            snd_iprintf(buf, "%i: %s\n", idx, str);
85        }
86    }
87    mutex_unlock(&strings);
88    if (ok < 0)
89        snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
90    return ok;
91}
92
93static void snd_sndstat_proc_read(struct snd_info_entry *entry,
94                  struct snd_info_buffer *buffer)
95{
96    snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA v" CONFIG_SND_VERSION " emulation code)\n");
97    snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
98            init_utsname()->sysname,
99            init_utsname()->nodename,
100            init_utsname()->release,
101            init_utsname()->version,
102            init_utsname()->machine);
103    snd_iprintf(buffer, "Config options: 0\n");
104    snd_iprintf(buffer, "\nInstalled drivers: \n");
105    snd_iprintf(buffer, "Type 10: ALSA emulation\n");
106    snd_iprintf(buffer, "\nCard config: \n");
107    snd_card_info_read_oss(buffer);
108    snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO);
109    snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH);
110    snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI);
111    snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS);
112    snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
113}
114
115int snd_info_minor_register(void)
116{
117    struct snd_info_entry *entry;
118
119    memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
120    if ((entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", snd_oss_root)) != NULL) {
121        entry->c.text.read = snd_sndstat_proc_read;
122        if (snd_info_register(entry) < 0) {
123            snd_info_free_entry(entry);
124            entry = NULL;
125        }
126    }
127    snd_sndstat_proc_entry = entry;
128    return 0;
129}
130
131int snd_info_minor_unregister(void)
132{
133    snd_info_free_entry(snd_sndstat_proc_entry);
134    snd_sndstat_proc_entry = NULL;
135    return 0;
136}
137
138#endif /* CONFIG_SND_OSSEMUL */
139

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