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 <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
  38 static DEFINE_MUTEX(strings);
  39 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
  40 static struct snd_info_entry *snd_sndstat_proc_entry;
  41
  42 int 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
  68 EXPORT_SYMBOL(snd_oss_info_register);
  69
  70 static 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
  93 static 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
 115 int 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
 131 int 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 */