fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / sound / core / info_oss.c
blob435c9399f7a94aa51aad11f2826993e395158639
1 /*
2 * Information interface for ALSA driver
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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.
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.
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
22 #include <sound/driver.h>
23 #include <linux/slab.h>
24 #include <linux/time.h>
25 #include <linux/string.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>
33 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
36 * OSS compatible part
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;
43 int snd_oss_info_register(int dev, int num, char *string)
45 char *x;
47 snd_assert(dev >= 0 && dev < SNDRV_OSS_INFO_DEV_COUNT, return -ENXIO);
48 snd_assert(num >= 0 && num < SNDRV_CARDS, return -ENXIO);
49 mutex_lock(&strings);
50 if (string == NULL) {
51 if ((x = snd_sndstat_strings[num][dev]) != NULL) {
52 kfree(x);
53 x = NULL;
55 } else {
56 x = kstrdup(string, GFP_KERNEL);
57 if (x == NULL) {
58 mutex_unlock(&strings);
59 return -ENOMEM;
62 snd_sndstat_strings[num][dev] = x;
63 mutex_unlock(&strings);
64 return 0;
67 EXPORT_SYMBOL(snd_oss_info_register);
69 extern void snd_card_info_read_oss(struct snd_info_buffer *buffer);
71 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
73 int idx, ok = -1;
74 char *str;
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++;
85 snd_iprintf(buf, "%i: %s\n", idx, str);
88 mutex_unlock(&strings);
89 if (ok < 0)
90 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
91 return ok;
94 static void snd_sndstat_proc_read(struct snd_info_entry *entry,
95 struct snd_info_buffer *buffer)
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);
116 int snd_info_minor_register(void)
118 struct snd_info_entry *entry;
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;
128 snd_sndstat_proc_entry = entry;
129 return 0;
132 int snd_info_minor_unregister(void)
134 snd_info_free_entry(snd_sndstat_proc_entry);
135 snd_sndstat_proc_entry = NULL;
136 return 0;
139 #endif /* CONFIG_SND_OSSEMUL */