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107 lines
2.8 KiB
107 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Information interface for ALSA driver |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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*/ |
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#include <linux/slab.h> |
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#include <linux/time.h> |
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#include <linux/string.h> |
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#include <linux/export.h> |
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#include <sound/core.h> |
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#include <sound/minors.h> |
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#include <sound/info.h> |
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#include <linux/utsname.h> |
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#include <linux/mutex.h> |
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/* |
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* OSS compatible part |
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*/ |
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static DEFINE_MUTEX(strings); |
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static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT]; |
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int snd_oss_info_register(int dev, int num, char *string) |
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{ |
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char *x; |
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if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT)) |
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return -ENXIO; |
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if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS)) |
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return -ENXIO; |
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mutex_lock(&strings); |
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if (string == NULL) { |
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if ((x = snd_sndstat_strings[num][dev]) != NULL) { |
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kfree(x); |
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x = NULL; |
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} |
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} else { |
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x = kstrdup(string, GFP_KERNEL); |
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if (x == NULL) { |
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mutex_unlock(&strings); |
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return -ENOMEM; |
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} |
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} |
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snd_sndstat_strings[num][dev] = x; |
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mutex_unlock(&strings); |
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return 0; |
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} |
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EXPORT_SYMBOL(snd_oss_info_register); |
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static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev) |
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{ |
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int idx, ok = -1; |
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char *str; |
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snd_iprintf(buf, "\n%s:", id); |
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mutex_lock(&strings); |
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for (idx = 0; idx < SNDRV_CARDS; idx++) { |
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str = snd_sndstat_strings[idx][dev]; |
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if (str) { |
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if (ok < 0) { |
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snd_iprintf(buf, "\n"); |
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ok++; |
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} |
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snd_iprintf(buf, "%i: %s\n", idx, str); |
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} |
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} |
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mutex_unlock(&strings); |
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if (ok < 0) |
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snd_iprintf(buf, " NOT ENABLED IN CONFIG\n"); |
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return ok; |
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} |
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static void snd_sndstat_proc_read(struct snd_info_entry *entry, |
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struct snd_info_buffer *buffer) |
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{ |
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snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)\n"); |
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snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n", |
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init_utsname()->sysname, |
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init_utsname()->nodename, |
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init_utsname()->release, |
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init_utsname()->version, |
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init_utsname()->machine); |
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snd_iprintf(buffer, "Config options: 0\n"); |
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snd_iprintf(buffer, "\nInstalled drivers: \n"); |
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snd_iprintf(buffer, "Type 10: ALSA emulation\n"); |
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snd_iprintf(buffer, "\nCard config: \n"); |
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snd_card_info_read_oss(buffer); |
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snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO); |
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snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH); |
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snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI); |
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snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS); |
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snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS); |
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} |
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int __init snd_info_minor_register(void) |
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{ |
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struct snd_info_entry *entry; |
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memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings)); |
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entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", |
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snd_oss_root); |
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if (!entry) |
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return -ENOMEM; |
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entry->c.text.read = snd_sndstat_proc_read; |
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return snd_info_register(entry); /* freed in error path */ |
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}
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