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Linux/sound/core/info_oss.c

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  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 */
139 

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