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