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kernel add
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/*
* 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/slab.h>
#include <linux/time.h>
#include <linux/string.h>
#include <linux/export.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/info.h>
#include <linux/utsname.h>
#include <linux/mutex.h>
/*
* OSS compatible part
*/
static DEFINE_MUTEX(strings);
static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
int snd_oss_info_register(int dev, int num, char *string)
{
char *x;
if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
return -ENXIO;
if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
return -ENXIO;
mutex_lock(&strings);
if (string == NULL) {
if ((x = snd_sndstat_strings[num][dev]) != NULL) {
kfree(x);
x = NULL;
}
} else {
x = kstrdup(string, GFP_KERNEL);
if (x == NULL) {
mutex_unlock(&strings);
return -ENOMEM;
}
}
snd_sndstat_strings[num][dev] = x;
mutex_unlock(&strings);
return 0;
}
EXPORT_SYMBOL(snd_oss_info_register);
static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
{
int idx, ok = -1;
char *str;
snd_iprintf(buf, "
%s:", id);
mutex_lock(&strings);
for (idx = 0; idx < SNDRV_CARDS; idx++) {
str = snd_sndstat_strings[idx][dev];
if (str) {
if (ok < 0) {
snd_iprintf(buf, "
");
ok++;
}
snd_iprintf(buf, "%i: %s
", idx, str);
}
}
mutex_unlock(&strings);
if (ok < 0)
snd_iprintf(buf, " NOT ENABLED IN CONFIG
");
return ok;
}
static void snd_sndstat_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)
");
snd_iprintf(buffer, "Kernel: %s %s %s %s %s
",
init_utsname()->sysname,
init_utsname()->nodename,
init_utsname()->release,
init_utsname()->version,
init_utsname()->machine);
snd_iprintf(buffer, "Config options: 0
");
snd_iprintf(buffer, "
Installed drivers:
");
snd_iprintf(buffer, "Type 10: ALSA emulation
");
snd_iprintf(buffer, "
Card config:
");
snd_card_info_read_oss(buffer);
snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO);
snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH);
snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI);
snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS);
snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
}
int __init snd_info_minor_register(void)
{
struct snd_info_entry *entry;
memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
entry = snd_info_create_module_entry(THIS_MODULE, "sndstat",
snd_oss_root);
if (!entry)
return -ENOMEM;
entry->c.text.read = snd_sndstat_proc_read;
return snd_info_register(entry); /* freed in error path */
}
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