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