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 <linux/utsname.h>
30 #include <linux/mutex.h>
31
32 /*
33 * OSS compatible part
34 */
35
36 static DEFINE_MUTEX(strings);
37 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
38
snd_oss_info_register(int dev,int num,char * string)39 int snd_oss_info_register(int dev, int num, char *string)
40 {
41 char *x;
42
43 if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
44 return -ENXIO;
45 if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
46 return -ENXIO;
47 mutex_lock(&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 = kstrdup(string, GFP_KERNEL);
55 if (x == NULL) {
56 mutex_unlock(&strings);
57 return -ENOMEM;
58 }
59 }
60 snd_sndstat_strings[num][dev] = x;
61 mutex_unlock(&strings);
62 return 0;
63 }
64 EXPORT_SYMBOL(snd_oss_info_register);
65
snd_sndstat_show_strings(struct snd_info_buffer * buf,char * id,int dev)66 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
67 {
68 int idx, ok = -1;
69 char *str;
70
71 snd_iprintf(buf, "\n%s:", id);
72 mutex_lock(&strings);
73 for (idx = 0; idx < SNDRV_CARDS; idx++) {
74 str = snd_sndstat_strings[idx][dev];
75 if (str) {
76 if (ok < 0) {
77 snd_iprintf(buf, "\n");
78 ok++;
79 }
80 snd_iprintf(buf, "%i: %s\n", idx, str);
81 }
82 }
83 mutex_unlock(&strings);
84 if (ok < 0)
85 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
86 return ok;
87 }
88
snd_sndstat_proc_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)89 static void snd_sndstat_proc_read(struct snd_info_entry *entry,
90 struct snd_info_buffer *buffer)
91 {
92 snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)\n");
93 snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
94 init_utsname()->sysname,
95 init_utsname()->nodename,
96 init_utsname()->release,
97 init_utsname()->version,
98 init_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
snd_info_minor_register(void)111 int __init snd_info_minor_register(void)
112 {
113 struct snd_info_entry *entry;
114
115 memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
116 entry = snd_info_create_module_entry(THIS_MODULE, "sndstat",
117 snd_oss_root);
118 if (!entry)
119 return -ENOMEM;
120 entry->c.text.read = snd_sndstat_proc_read;
121 return snd_info_register(entry); /* freed in error path */
122 }
123
