1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Information interface for ALSA driver
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 */
6
7 #include <linux/slab.h>
8 #include <linux/time.h>
9 #include <linux/string.h>
10 #include <linux/export.h>
11 #include <sound/core.h>
12 #include <sound/minors.h>
13 #include <sound/info.h>
14 #include <linux/utsname.h>
15 #include <linux/mutex.h>
16
17 /*
18 * OSS compatible part
19 */
20
21 static DEFINE_MUTEX(strings);
22 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
23
snd_oss_info_register(int dev,int num,char * string)24 int snd_oss_info_register(int dev, int num, char *string)
25 {
26 char *x;
27
28 if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
29 return -ENXIO;
30 if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
31 return -ENXIO;
32 mutex_lock(&strings);
33 if (string == NULL) {
34 if ((x = snd_sndstat_strings[num][dev]) != NULL) {
35 kfree(x);
36 x = NULL;
37 }
38 } else {
39 x = kstrdup(string, GFP_KERNEL);
40 if (x == NULL) {
41 mutex_unlock(&strings);
42 return -ENOMEM;
43 }
44 }
45 snd_sndstat_strings[num][dev] = x;
46 mutex_unlock(&strings);
47 return 0;
48 }
49 EXPORT_SYMBOL(snd_oss_info_register);
50
snd_sndstat_show_strings(struct snd_info_buffer * buf,char * id,int dev)51 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
52 {
53 int idx, ok = -1;
54 char *str;
55
56 snd_iprintf(buf, "\n%s:", id);
57 mutex_lock(&strings);
58 for (idx = 0; idx < SNDRV_CARDS; idx++) {
59 str = snd_sndstat_strings[idx][dev];
60 if (str) {
61 if (ok < 0) {
62 snd_iprintf(buf, "\n");
63 ok++;
64 }
65 snd_iprintf(buf, "%i: %s\n", idx, str);
66 }
67 }
68 mutex_unlock(&strings);
69 if (ok < 0)
70 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
71 return ok;
72 }
73
snd_sndstat_proc_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)74 static void snd_sndstat_proc_read(struct snd_info_entry *entry,
75 struct snd_info_buffer *buffer)
76 {
77 snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)\n");
78 snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
79 init_utsname()->sysname,
80 init_utsname()->nodename,
81 init_utsname()->release,
82 init_utsname()->version,
83 init_utsname()->machine);
84 snd_iprintf(buffer, "Config options: 0\n");
85 snd_iprintf(buffer, "\nInstalled drivers: \n");
86 snd_iprintf(buffer, "Type 10: ALSA emulation\n");
87 snd_iprintf(buffer, "\nCard config: \n");
88 snd_card_info_read_oss(buffer);
89 snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO);
90 snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH);
91 snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI);
92 snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS);
93 snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
94 }
95
snd_info_minor_register(void)96 int __init snd_info_minor_register(void)
97 {
98 struct snd_info_entry *entry;
99
100 memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
101 entry = snd_info_create_module_entry(THIS_MODULE, "sndstat",
102 snd_oss_root);
103 if (!entry)
104 return -ENOMEM;
105 entry->c.text.read = snd_sndstat_proc_read;
106 return snd_info_register(entry); /* freed in error path */
107 }
108
