linux/sound/core/info_oss.c
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   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 <sound/driver.h>
  23#include <linux/slab.h>
  24#include <linux/time.h>
  25#include <linux/string.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        snd_assert(dev >= 0 && dev < SNDRV_OSS_INFO_DEV_COUNT, return -ENXIO);
  48        snd_assert(num >= 0 && num < SNDRV_CARDS, return -ENXIO);
  49        mutex_lock(&strings);
  50        if (string == NULL) {
  51                if ((x = snd_sndstat_strings[num][dev]) != NULL) {
  52                        kfree(x);
  53                        x = NULL;
  54                }
  55        } else {
  56                x = kstrdup(string, GFP_KERNEL);
  57                if (x == NULL) {
  58                        mutex_unlock(&strings);
  59                        return -ENOMEM;
  60                }
  61        }
  62        snd_sndstat_strings[num][dev] = x;
  63        mutex_unlock(&strings);
  64        return 0;
  65}
  66
  67EXPORT_SYMBOL(snd_oss_info_register);
  68
  69extern void snd_card_info_read_oss(struct snd_info_buffer *buffer);
  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 */
 140