[mirror_ubuntu-focal-kernel.git] / sound / core / info_oss.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Information interface for ALSA driver
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 */

#include <linux/slab.h>
#include <linux/time.h>
#include <linux/string.h>
#include <linux/export.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/info.h>
#include <linux/utsname.h>
#include <linux/mutex.h>

/*
 *  OSS compatible part
 */

static DEFINE_MUTEX(strings);
static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];

int snd_oss_info_register(int dev, int num, char *string)
{
	char *x;

	if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
		return -ENXIO;
	if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
		return -ENXIO;
	mutex_lock(&strings);
	if (string == NULL) {
		if ((x = snd_sndstat_strings[num][dev]) != NULL) {
			kfree(x);
			x = NULL;
		}
	} else {
		x = kstrdup(string, GFP_KERNEL);
		if (x == NULL) {
			mutex_unlock(&strings);
			return -ENOMEM;
		}
	}
	snd_sndstat_strings[num][dev] = x;
	mutex_unlock(&strings);
	return 0;
}
EXPORT_SYMBOL(snd_oss_info_register);

static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)
{
	int idx, ok = -1;
	char *str;

	snd_iprintf(buf, "\n%s:", id);
	mutex_lock(&strings);
	for (idx = 0; idx < SNDRV_CARDS; idx++) {
		str = snd_sndstat_strings[idx][dev];
		if (str) {
			if (ok < 0) {
				snd_iprintf(buf, "\n");
				ok++;
			}
			snd_iprintf(buf, "%i: %s\n", idx, str);
		}
	}
	mutex_unlock(&strings);
	if (ok < 0)
		snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
	return ok;
}

static void snd_sndstat_proc_read(struct snd_info_entry *entry,
				  struct snd_info_buffer *buffer)
{
	snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)\n");
	snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
		    init_utsname()->sysname,
		    init_utsname()->nodename,
		    init_utsname()->release,
		    init_utsname()->version,
		    init_utsname()->machine);
	snd_iprintf(buffer, "Config options: 0\n");
	snd_iprintf(buffer, "\nInstalled drivers: \n");
	snd_iprintf(buffer, "Type 10: ALSA emulation\n");
	snd_iprintf(buffer, "\nCard config: \n");
	snd_card_info_read_oss(buffer);
	snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO);
	snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH);
	snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI);
	snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS);
	snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS);
}

int __init snd_info_minor_register(void)
{
	struct snd_info_entry *entry;

	memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
	entry = snd_info_create_module_entry(THIS_MODULE, "sndstat",
					     snd_oss_root);
	if (!entry)
		return -ENOMEM;
	entry->c.text.read = snd_sndstat_proc_read;
	return snd_info_register(entry); /* freed in error path */
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
1da177e4 LT	3	* Information interface for ALSA driver
c1017a4c	4	* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4 LT	5	*/
1da177e4 LT	6
1da177e4 LT	7	#include <linux/slab.h>
1da177e4 LT	8	#include <linux/time.h>
543537bd	9	#include <linux/string.h>
d81a6d71	10	#include <linux/export.h>
1da177e4 LT	11	#include <sound/core.h>
	12	#include <sound/minors.h>
	13	#include <sound/info.h>
1da177e4	14	#include <linux/utsname.h>
1a60d4c5	15	#include <linux/mutex.h>
1da177e4	16
1da177e4 LT	17	/*
	18	* OSS compatible part
	19	*/
	20
1a60d4c5	21	static DEFINE_MUTEX(strings);
1da177e4	22	static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT];
1da177e4 LT	23
	24	int snd_oss_info_register(int dev, int num, char *string)
	25	{
	26	char *x;
	27
7eaa943c TI	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;
1a60d4c5	32	mutex_lock(&strings);
1da177e4 LT	33	if (string == NULL) {
	34	if ((x = snd_sndstat_strings[num][dev]) != NULL) {
	35	kfree(x);
	36	x = NULL;
	37	}
	38	} else {
543537bd	39	x = kstrdup(string, GFP_KERNEL);
1da177e4	40	if (x == NULL) {
1a60d4c5	41	mutex_unlock(&strings);
1da177e4 LT	42	return -ENOMEM;
	43	}
	44	}
	45	snd_sndstat_strings[num][dev] = x;
1a60d4c5	46	mutex_unlock(&strings);
1da177e4 LT	47	return 0;
1da177e4 LT	48	}
c0d3fb39 TI	49	EXPORT_SYMBOL(snd_oss_info_register);
c0d3fb39 TI	50
174c1f65	51	static int snd_sndstat_show_strings(struct snd_info_buffer buf, char id, int dev)
1da177e4 LT	52	{
	53	int idx, ok = -1;
	54	char *str;
	55
	56	snd_iprintf(buf, "\n%s:", id);
1a60d4c5	57	mutex_lock(&strings);
1da177e4 LT	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	}
1a60d4c5	68	mutex_unlock(&strings);
1da177e4 LT	69	if (ok < 0)
	70	snd_iprintf(buf, " NOT ENABLED IN CONFIG\n");
	71	return ok;
	72	}
	73
174c1f65 TI	74	static void snd_sndstat_proc_read(struct snd_info_entry *entry,
174c1f65 TI	75	struct snd_info_buffer *buffer)
1da177e4	76	{
42662748	77	snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)\n");
1da177e4	78	snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n",
96b644bd SH	79	init_utsname()->sysname,
	80	init_utsname()->nodename,
	81	init_utsname()->release,
	82	init_utsname()->version,
	83	init_utsname()->machine);
1da177e4 LT	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
a0dca822	96	int __init snd_info_minor_register(void)
1da177e4	97	{
174c1f65	98	struct snd_info_entry *entry;
1da177e4 LT	99
1da177e4 LT	100	memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings));
a0dca822 TI	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 */
1da177e4	107	}