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