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 <sound/core.h> 26 #include <sound/minors.h> 27 #include <sound/info.h> 28 #include <sound/version.h> 29 #include <linux/utsname.h> 30 #include <linux/mutex.h> 31 32 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS) 33 34 /* 35 * OSS compatible part 36 */ 37 38 static DEFINE_MUTEX(strings); 39 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT]; 40 static struct snd_info_entry *snd_sndstat_proc_entry; 41 42 int snd_oss_info_register(int dev, int num, char *string) 43 { 44 char *x; 45 46 if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT)) 47 return -ENXIO; 48 if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS)) 49 return -ENXIO; 50 mutex_lock(&strings); 51 if (string == NULL) { 52 if ((x = snd_sndstat_strings[num][dev]) != NULL) { 53 kfree(x); 54 x = NULL; 55 } 56 } else { 57 x = kstrdup(string, GFP_KERNEL); 58 if (x == NULL) { 59 mutex_unlock(&strings); 60 return -ENOMEM; 61 } 62 } 63 snd_sndstat_strings[num][dev] = x; 64 mutex_unlock(&strings); 65 return 0; 66 } 67 68 EXPORT_SYMBOL(snd_oss_info_register); 69 70 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev) 71 { 72 int idx, ok = -1; 73 char *str; 74 75 snd_iprintf(buf, "\n%s:", id); 76 mutex_lock(&strings); 77 for (idx = 0; idx < SNDRV_CARDS; idx++) { 78 str = snd_sndstat_strings[idx][dev]; 79 if (str) { 80 if (ok < 0) { 81 snd_iprintf(buf, "\n"); 82 ok++; 83 } 84 snd_iprintf(buf, "%i: %s\n", idx, str); 85 } 86 } 87 mutex_unlock(&strings); 88 if (ok < 0) 89 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n"); 90 return ok; 91 } 92 93 static void snd_sndstat_proc_read(struct snd_info_entry *entry, 94 struct snd_info_buffer *buffer) 95 { 96 snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA v" CONFIG_SND_VERSION " emulation code)\n"); 97 snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n", 98 init_utsname()->sysname, 99 init_utsname()->nodename, 100 init_utsname()->release, 101 init_utsname()->version, 102 init_utsname()->machine); 103 snd_iprintf(buffer, "Config options: 0\n"); 104 snd_iprintf(buffer, "\nInstalled drivers: \n"); 105 snd_iprintf(buffer, "Type 10: ALSA emulation\n"); 106 snd_iprintf(buffer, "\nCard config: \n"); 107 snd_card_info_read_oss(buffer); 108 snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO); 109 snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH); 110 snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI); 111 snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS); 112 snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS); 113 } 114 115 int snd_info_minor_register(void) 116 { 117 struct snd_info_entry *entry; 118 119 memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings)); 120 if ((entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", snd_oss_root)) != NULL) { 121 entry->c.text.read = snd_sndstat_proc_read; 122 if (snd_info_register(entry) < 0) { 123 snd_info_free_entry(entry); 124 entry = NULL; 125 } 126 } 127 snd_sndstat_proc_entry = entry; 128 return 0; 129 } 130 131 int snd_info_minor_unregister(void) 132 { 133 snd_info_free_entry(snd_sndstat_proc_entry); 134 snd_sndstat_proc_entry = NULL; 135 return 0; 136 } 137 138 #endif /* CONFIG_SND_OSSEMUL */ 139