sound/core/info_oss.c

   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 <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
  39 static DEFINE_MUTEX(strings);
  40 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
  41 static struct snd_info_entry *snd_sndstat_proc_entry;
  42
  43 int snd_oss_info_register(int dev, int num, char *string)
  44 {
  45         char *x;
  46
  47         if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
  48                 return -ENXIO;
  49         if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
  50                 return -ENXIO;
  51         mutex_lock(&strings);
  52         if (string == NULL) {
  53                 if ((x = snd_sndstat_strings[num][dev]) != NULL) {
  54                         kfree(x);
  55                         x = NULL;
  56                 }
  57         } else {
  58                 x = kstrdup(string, GFP_KERNEL);
  59                 if (x == NULL) {
  60                         mutex_unlock(&strings);
  61                         return -ENOMEM;
  62                 }
  63         }
  64         snd_sndstat_strings[num][dev] = x;
  65         mutex_unlock(&strings);
  66         return 0;
  67 }
  68
  69 EXPORT_SYMBOL(snd_oss_info_register);
  70
  71 static 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
  94 static 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
 116 int 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
 132 int 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 */