sound/core/misc.c

   1 /*
   2  *  Misc and compatibility things
   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/init.h>
  23 #include <linux/module.h>
  24 #include <linux/time.h>
  25 #include <linux/slab.h>
  26 #include <linux/ioport.h>
  27 #include <sound/core.h>
  28
  29 #ifdef CONFIG_SND_DEBUG
  30
  31 #ifdef CONFIG_SND_DEBUG_VERBOSE
  32 #define DEFAULT_DEBUG_LEVEL     2
  33 #else
  34 #define DEFAULT_DEBUG_LEVEL     1
  35 #endif
  36
  37 static int debug = DEFAULT_DEBUG_LEVEL;
  38 module_param(debug, int, 0644);
  39 MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
  40
  41 #endif /* CONFIG_SND_DEBUG */
  42
  43 void release_and_free_resource(struct resource *res)
  44 {
  45         if (res) {
  46                 release_resource(res);
  47                 kfree(res);
  48         }
  49 }
  50
  51 EXPORT_SYMBOL(release_and_free_resource);
  52
  53 #ifdef CONFIG_SND_VERBOSE_PRINTK
  54 /* strip the leading path if the given path is absolute */
  55 static const char *sanity_file_name(const char *path)
  56 {
  57         if (*path == '/')
  58                 return strrchr(path, '/') + 1;
  59         else
  60                 return path;
  61 }
  62 #endif
  63
  64 #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
  65 void __snd_printk(unsigned int level, const char *path, int line,
  66                   const char *format, ...)
  67 {
  68         va_list args;
  69 #ifdef CONFIG_SND_VERBOSE_PRINTK
  70         struct va_format vaf;
  71         char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
  72 #endif
  73
  74 #ifdef CONFIG_SND_DEBUG
  75         if (debug < level)
  76                 return;
  77 #endif
  78
  79         va_start(args, format);
  80 #ifdef CONFIG_SND_VERBOSE_PRINTK
  81         vaf.fmt = format;
  82         vaf.va = &args;
  83         if (format[0] == '<' && format[2] == '>') {
  84                 memcpy(verbose_fmt, format, 3);
  85                 vaf.fmt = format + 3;
  86         } else if (level)
  87                 memcpy(verbose_fmt, KERN_DEBUG, 3);
  88         printk(verbose_fmt, sanity_file_name(path), line, &vaf);
  89 #else
  90         vprintk(format, args);
  91 #endif
  92         va_end(args);
  93 }
  94 EXPORT_SYMBOL_GPL(__snd_printk);
  95 #endif
  96
  97 #ifdef CONFIG_PCI
  98 #include <linux/pci.h>
  99 /**
 100  * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
 101  * @vendor: PCI SSV id
 102  * @device: PCI SSD id
 103  * @list: quirk list, terminated by a null entry
 104  *
 105  * Look through the given quirk list and finds a matching entry
 106  * with the same PCI SSID.  When subdevice is 0, all subdevice
 107  * values may match.
 108  *
 109  * Returns the matched entry pointer, or NULL if nothing matched.
 110  */
 111 const struct snd_pci_quirk *
 112 snd_pci_quirk_lookup_id(u16 vendor, u16 device,
 113                         const struct snd_pci_quirk *list)
 114 {
 115         const struct snd_pci_quirk *q;
 116
 117         for (q = list; q->subvendor; q++) {
 118                 if (q->subvendor != vendor)
 119                         continue;
 120                 if (!q->subdevice ||
 121                     (device & q->subdevice_mask) == q->subdevice)
 122                         return q;
 123         }
 124         return NULL;
 125 }
 126 EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
 127
 128 /**
 129  * snd_pci_quirk_lookup - look up a PCI SSID quirk list
 130  * @pci: pci_dev handle
 131  * @list: quirk list, terminated by a null entry
 132  *
 133  * Look through the given quirk list and finds a matching entry
 134  * with the same PCI SSID.  When subdevice is 0, all subdevice
 135  * values may match.
 136  *
 137  * Returns the matched entry pointer, or NULL if nothing matched.
 138  */
 139 const struct snd_pci_quirk *
 140 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
 141 {
 142         return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
 143                                        pci->subsystem_device,
 144                                        list);
 145 }
 146 EXPORT_SYMBOL(snd_pci_quirk_lookup);
 147 #endif