1 /* 2 * Information interface for ALSA driver 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 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. 10 * 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. 15 * 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 19 * 20 */ 21 22 #include <linux/slab.h> 23 #include <linux/time.h> 24 #include <linux/string.h> 25 #include <linux/export.h> 26 #include <sound/core.h> 27 #include <sound/minors.h> 28 #include <sound/info.h> 29 #include <linux/utsname.h> 30 #include <linux/mutex.h> 31 32 /* 33 * OSS compatible part 34 */ 35 36 static DEFINE_MUTEX(strings); 37 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT]; 38 39 int snd_oss_info_register(int dev, int num, char *string) 40 { 41 char *x; 42 43 if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT)) 44 return -ENXIO; 45 if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS)) 46 return -ENXIO; 47 mutex_lock(&strings); 48 if (string == NULL) { 49 if ((x = snd_sndstat_strings[num][dev]) != NULL) { 50 kfree(x); 51 x = NULL; 52 } 53 } else { 54 x = kstrdup(string, GFP_KERNEL); 55 if (x == NULL) { 56 mutex_unlock(&strings); 57 return -ENOMEM; 58 } 59 } 60 snd_sndstat_strings[num][dev] = x; 61 mutex_unlock(&strings); 62 return 0; 63 } 64 65 EXPORT_SYMBOL(snd_oss_info_register); 66 67 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev) 68 { 69 int idx, ok = -1; 70 char *str; 71 72 snd_iprintf(buf, "\n%s:", id); 73 mutex_lock(&strings); 74 for (idx = 0; idx < SNDRV_CARDS; idx++) { 75 str = snd_sndstat_strings[idx][dev]; 76 if (str) { 77 if (ok < 0) { 78 snd_iprintf(buf, "\n"); 79 ok++; 80 } 81 snd_iprintf(buf, "%i: %s\n", idx, str); 82 } 83 } 84 mutex_unlock(&strings); 85 if (ok < 0) 86 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n"); 87 return ok; 88 } 89 90 static void snd_sndstat_proc_read(struct snd_info_entry *entry, 91 struct snd_info_buffer *buffer) 92 { 93 snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA emulation code)\n"); 94 snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n", 95 init_utsname()->sysname, 96 init_utsname()->nodename, 97 init_utsname()->release, 98 init_utsname()->version, 99 init_utsname()->machine); 100 snd_iprintf(buffer, "Config options: 0\n"); 101 snd_iprintf(buffer, "\nInstalled drivers: \n"); 102 snd_iprintf(buffer, "Type 10: ALSA emulation\n"); 103 snd_iprintf(buffer, "\nCard config: \n"); 104 snd_card_info_read_oss(buffer); 105 snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO); 106 snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH); 107 snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI); 108 snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS); 109 snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS); 110 } 111 112 int __init snd_info_minor_register(void) 113 { 114 struct snd_info_entry *entry; 115 116 memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings)); 117 entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", 118 snd_oss_root); 119 if (!entry) 120 return -ENOMEM; 121 entry->c.text.read = snd_sndstat_proc_read; 122 return snd_info_register(entry); /* freed in error path */ 123 } 124