Merge branch 'linux-3.4.57' into rel-17
[linux-2.6.git] / 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 <linux/export.h>
26 #include <sound/core.h>
27 #include <sound/minors.h>
28 #include <sound/info.h>
29 #include <sound/version.h>
30 #include <linux/utsname.h>
31 #include <linux/mutex.h>
32
33 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
34
35 /*
36  *  OSS compatible part
37  */
38
39 static DEFINE_MUTEX(strings);
40 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
41 static struct snd_info_entry *snd_sndstat_proc_entry;
42
43 int snd_oss_info_register(int dev, int num, char *string)
44 {
45         char *x;
46
47         if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
48                 return -ENXIO;
49         if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
50                 return -ENXIO;
51         mutex_lock(&strings);
52         if (string == NULL) {
53                 if ((x = snd_sndstat_strings[num][dev]) != NULL) {
54                         kfree(x);
55                         x = NULL;
56                 }
57         } else {
58                 x = kstrdup(string, GFP_KERNEL);
59                 if (x == NULL) {
60                         mutex_unlock(&strings);
61                         return -ENOMEM;
62                 }
63         }
64         snd_sndstat_strings[num][dev] = x;
65         mutex_unlock(&strings);
66         return 0;
67 }
68
69 EXPORT_SYMBOL(snd_oss_info_register);
70
71 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
72 {
73         int idx, ok = -1;
74         char *str;
75
76         snd_iprintf(buf, "\n%s:", id);
77         mutex_lock(&strings);
78         for (idx = 0; idx < SNDRV_CARDS; idx++) {
79                 str = snd_sndstat_strings[idx][dev];
80                 if (str) {
81                         if (ok < 0) {
82                                 snd_iprintf(buf, "\n");
83                                 ok++;
84                         }
85                         snd_iprintf(buf, "%i: %s\n", idx, str);
86                 }
87         }
88         mutex_unlock(&strings);
89         if (ok < 0)
90                 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
91         return ok;
92 }
93
94 static void snd_sndstat_proc_read(struct snd_info_entry *entry,
95                                   struct snd_info_buffer *buffer)
96 {
97         snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA v" CONFIG_SND_VERSION " emulation code)\n");
98         snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
99                     init_utsname()->sysname,
100                     init_utsname()->nodename,
101                     init_utsname()->release,
102                     init_utsname()->version,
103                     init_utsname()->machine);
104         snd_iprintf(buffer, "Config options: 0\n");
105         snd_iprintf(buffer, "\nInstalled drivers: \n");
106         snd_iprintf(buffer, "Type 10: ALSA emulation\n");
107         snd_iprintf(buffer, "\nCard config: \n");
108         snd_card_info_read_oss(buffer);
109         snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO);
110         snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH);
111         snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI);
112         snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS);
113         snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
114 }
115
116 int snd_info_minor_register(void)
117 {
118         struct snd_info_entry *entry;
119
120         memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
121         if ((entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", snd_oss_root)) != NULL) {
122                 entry->c.text.read = snd_sndstat_proc_read;
123                 if (snd_info_register(entry) < 0) {
124                         snd_info_free_entry(entry);
125                         entry = NULL;
126                 }
127         }
128         snd_sndstat_proc_entry = entry;
129         return 0;
130 }
131
132 int snd_info_minor_unregister(void)
133 {
134         snd_info_free_entry(snd_sndstat_proc_entry);
135         snd_sndstat_proc_entry = NULL;
136         return 0;
137 }
138
139 #endif /* CONFIG_SND_OSSEMUL */