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         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
  66 EXPORT_SYMBOL(snd_oss_info_register);
  67
  68 static 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
  91 static 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
 113 int 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
 129 int 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 */