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