LXR linux-bk/sound/core/info

   1/*
   2 *  Information interface for ALSA driver
   3 *  Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/core.h>
  26#include <sound/minors.h>
  27#include <sound/info.h>
  28#include <sound/version.h>
  29#include <linux/utsname.h>
  30
  31#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
  32
  33/*
  34 *  OSS compatible part
  35 */
  36
  37static DECLARE_MUTEX(strings);
  38static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
  39static snd_info_entry_t *snd_sndstat_proc_entry;
  40
  41int snd_oss_info_register(int dev, int num, char *string)
  42{
  43        char *x;
  44
  45        snd_assert(dev >= 0 && dev < SNDRV_OSS_INFO_DEV_COUNT, return -ENXIO);
  46        snd_assert(num >= 0 && num < SNDRV_CARDS, return -ENXIO);
  47        down(&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 = snd_kmalloc_strdup(string, GFP_KERNEL);
  55                if (x == NULL) {
  56                        up(&strings);
  57                        return -ENOMEM;
  58                }
  59        }
  60        snd_sndstat_strings[num][dev] = x;
  61        up(&strings);
  62        return 0;
  63}
  64
  65extern void snd_card_info_read_oss(snd_info_buffer_t * buffer);
  66
  67static int snd_sndstat_show_strings(snd_info_buffer_t * buf, char *id, int dev)
  68{
  69        int idx, ok = -1;
  70        char *str;
  71
  72        snd_iprintf(buf, "\n%s:", id);
  73        down(&strings);
  74        for (idx = 0; idx < SNDRV_CARDS; idx++) {
  75                str = snd_sndstat_strings[idx][dev];
  76                if (str) {
  77                        if (ok < 0) {
  78                                snd_iprintf(buf, "\n");
  79                                ok++;
  80                        }
  81                        snd_iprintf(buf, "%i: %s\n", idx, str);
  82                }
  83        }
  84        up(&strings);
  85        if (ok < 0)
  86                snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
  87        return ok;
  88}
  89
  90static void snd_sndstat_proc_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
  91{
  92        snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA v" CONFIG_SND_VERSION " emulation code)\n");
  93        snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
  94                    system_utsname.sysname,
  95                    system_utsname.nodename,
  96                    system_utsname.release,
  97                    system_utsname.version,
  98                    system_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 snd_info_minor_register(void)
 112{
 113        snd_info_entry_t *entry;
 114
 115        memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
 116        if ((entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", snd_oss_root)) != NULL) {
 117                entry->c.text.read_size = 2048;
 118                entry->c.text.read = snd_sndstat_proc_read;
 119                if (snd_info_register(entry) < 0) {
 120                        snd_info_free_entry(entry);
 121                        entry = NULL;
 122                }
 123        }
 124        snd_sndstat_proc_entry = entry;
 125        return 0;
 126}
 127
 128int snd_info_minor_unregister(void)
 129{
 130        if (snd_sndstat_proc_entry) {
 131                snd_info_unregister(snd_sndstat_proc_entry);
 132                snd_sndstat_proc_entry = NULL;
 133        }
 134        return 0;
 135}
 136
 137#endif /* CONFIG_SND_OSSEMUL */
 138