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
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 guard(mutex)(&strings);
33 if (string == NULL) {
34 x = snd_sndstat_strings[num][dev];
35 kfree(x);
36 x = NULL;
37 } else {
38 x = kstrdup(string, GFP_KERNEL);
39 if (x == NULL)
40 return -ENOMEM;
41 }
42 snd_sndstat_strings[num][dev] = x;
43 return 0;
44 }
45 EXPORT_SYMBOL(snd_oss_info_register);
46
47 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
48 {
49 int idx, ok = -1;
50 char *str;
51
52 snd_iprintf(buf, "\n%s:", id);
53 guard(mutex)(&strings);
54 for (idx = 0; idx < SNDRV_CARDS; idx++) {
55 str = snd_sndstat_strings[idx][dev];
56 if (str) {
57 if (ok < 0) {
58 snd_iprintf(buf, "\n");
59 ok++;
60 }
61 snd_iprintf(buf, "%i: %s\n", idx, str);
62 }
63 }
64 if (ok < 0)
65 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
66 return ok;
67 }
68
69 static void snd_sndstat_proc_read(struct snd_info_entry *entry,
70 struct snd_info_buffer *buffer)
71 {
72 snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)\n");
73 snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
74 init_utsname()->sysname,
75 init_utsname()->nodename,
76 init_utsname()->release,
77 init_utsname()->version,
78 init_utsname()->machine);
79 snd_iprintf(buffer, "Config options: 0\n");
80 snd_iprintf(buffer, "\nInstalled drivers: \n");
81 snd_iprintf(buffer, "Type 10: ALSA emulation\n");
82 snd_iprintf(buffer, "\nCard config: \n");
83 snd_card_info_read_oss(buffer);
84 snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO);
85 snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH);
86 snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI);
87 snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS);
88 snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
89 }
90
91 int __init snd_info_minor_register(void)
92 {
93 struct snd_info_entry *entry;
94
95 memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
96 entry = snd_info_create_module_entry(THIS_MODULE, "sndstat",
97 snd_oss_root);
98 if (!entry)
99 return -ENOMEM;
100 entry->c.text.read = snd_sndstat_proc_read;
101 return snd_info_register(entry); /* freed in error path */
102 }
103
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