LXR linux/sound/core/info

   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