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#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
33
34/*
35 *  OSS compatible part
36 */
37
38static DEFINE_MUTEX(strings);
39static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
40static struct snd_info_entry *snd_sndstat_proc_entry;
41
42int 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
68EXPORT_SYMBOL(snd_oss_info_register);
69
70static 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
93static 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 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
115int 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
131int 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