/*
   *  Information interface for ALSA driver

   *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>

   *
   *
   *   This program is free software; you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *   GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program; if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   *
   */

  #include <linux/slab.h>
  #include <linux/time.h>

  #include <linux/string.h>

  #include <linux/export.h>

  #include <sound/core.h>
  #include <sound/minors.h>
  #include <sound/info.h>

  #include <linux/utsname.h>

  #include <linux/mutex.h>

  /*
   *  OSS compatible part
   */

  static DEFINE_MUTEX(strings);

  static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];

  
  int snd_oss_info_register(int dev, int num, char *string)
  {
  	char *x;

  	if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
  		return -ENXIO;
  	if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
  		return -ENXIO;

  	mutex_lock(&strings);

  	if (string == NULL) {
  		if ((x = snd_sndstat_strings[num][dev]) != NULL) {
  			kfree(x);
  			x = NULL;
  		}
  	} else {

  		x = kstrdup(string, GFP_KERNEL);

  		if (x == NULL) {

  			mutex_unlock(&strings);

  			return -ENOMEM;
  		}
  	}
  	snd_sndstat_strings[num][dev] = x;

  	mutex_unlock(&strings);

  	return 0;
  }

  EXPORT_SYMBOL(snd_oss_info_register);

  static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)

  {
  	int idx, ok = -1;
  	char *str;
  
  	snd_iprintf(buf, "
  %s:", id);

  	mutex_lock(&strings);

  	for (idx = 0; idx < SNDRV_CARDS; idx++) {
  		str = snd_sndstat_strings[idx][dev];
  		if (str) {
  			if (ok < 0) {
  				snd_iprintf(buf, "
  ");
  				ok++;
  			}
  			snd_iprintf(buf, "%i: %s
  ", idx, str);
  		}
  	}

  	mutex_unlock(&strings);

  	if (ok < 0)
  		snd_iprintf(buf, " NOT ENABLED IN CONFIG
  ");
  	return ok;
  }

  static void snd_sndstat_proc_read(struct snd_info_entry *entry,
  				  struct snd_info_buffer *buffer)

  {

  	snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)
  ");

  	snd_iprintf(buffer, "Kernel: %s %s %s %s %s
  ",

  		    init_utsname()->sysname,
  		    init_utsname()->nodename,
  		    init_utsname()->release,
  		    init_utsname()->version,
  		    init_utsname()->machine);

  	snd_iprintf(buffer, "Config options: 0
  ");
  	snd_iprintf(buffer, "
  Installed drivers: 
  ");
  	snd_iprintf(buffer, "Type 10: ALSA emulation
  ");
  	snd_iprintf(buffer, "
  Card config: 
  ");
  	snd_card_info_read_oss(buffer);
  	snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO);
  	snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH);
  	snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI);
  	snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS);
  	snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
  }

  int __init snd_info_minor_register(void)

  {

  	struct snd_info_entry *entry;

  
  	memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));

  	entry = snd_info_create_module_entry(THIS_MODULE, "sndstat",
  					     snd_oss_root);
  	if (!entry)
  		return -ENOMEM;
  	entry->c.text.read = snd_sndstat_proc_read;
  	return snd_info_register(entry); /* freed in error path */

  }