LXR linux/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/export.h>
  24#include <linux/moduleparam.h>
  25#include <linux/time.h>
  26#include <linux/slab.h>
  27#include <linux/ioport.h>
  28#include <sound/core.h>
  29
  30#ifdef CONFIG_SND_DEBUG
  31
  32#ifdef CONFIG_SND_DEBUG_VERBOSE
  33#define DEFAULT_DEBUG_LEVEL     2
  34#else
  35#define DEFAULT_DEBUG_LEVEL     1
  36#endif
  37
  38static int debug = DEFAULT_DEBUG_LEVEL;
  39module_param(debug, int, 0644);
  40MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
  41
  42#endif /* CONFIG_SND_DEBUG */
  43
  44void release_and_free_resource(struct resource *res)
  45{
  46        if (res) {
  47                release_resource(res);
  48                kfree(res);
  49        }
  50}
  51
  52EXPORT_SYMBOL(release_and_free_resource);
  53
  54#ifdef CONFIG_SND_VERBOSE_PRINTK
  55/* strip the leading path if the given path is absolute */
  56static const char *sanity_file_name(const char *path)
  57{
  58        if (*path == '/')
  59                return strrchr(path, '/') + 1;
  60        else
  61                return path;
  62}
  63#endif
  64
  65#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
  66void __snd_printk(unsigned int level, const char *path, int line,
  67                  const char *format, ...)
  68{
  69        va_list args;
  70#ifdef CONFIG_SND_VERBOSE_PRINTK
  71        struct va_format vaf;
  72        char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
  73#endif
  74
  75#ifdef CONFIG_SND_DEBUG 
  76        if (debug < level)
  77                return;
  78#endif
  79
  80        va_start(args, format);
  81#ifdef CONFIG_SND_VERBOSE_PRINTK
  82        vaf.fmt = format;
  83        vaf.va = &args;
  84        if (format[0] == '<' && format[2] == '>') {
  85                memcpy(verbose_fmt, format, 3);
  86                vaf.fmt = format + 3;
  87        } else if (level)
  88                memcpy(verbose_fmt, KERN_DEBUG, 3);
  89        printk(verbose_fmt, sanity_file_name(path), line, &vaf);
  90#else
  91        vprintk(format, args);
  92#endif
  93        va_end(args);
  94}
  95EXPORT_SYMBOL_GPL(__snd_printk);
  96#endif
  97
  98#ifdef CONFIG_PCI
  99#include <linux/pci.h>
 100/**
 101 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
 102 * @vendor: PCI SSV id
 103 * @device: PCI SSD id
 104 * @list: quirk list, terminated by a null entry
 105 *
 106 * Look through the given quirk list and finds a matching entry
 107 * with the same PCI SSID.  When subdevice is 0, all subdevice
 108 * values may match.
 109 *
 110 * Returns the matched entry pointer, or NULL if nothing matched.
 111 */
 112const struct snd_pci_quirk *
 113snd_pci_quirk_lookup_id(u16 vendor, u16 device,
 114                        const struct snd_pci_quirk *list)
 115{
 116        const struct snd_pci_quirk *q;
 117
 118        for (q = list; q->subvendor; q++) {
 119                if (q->subvendor != vendor)
 120                        continue;
 121                if (!q->subdevice ||
 122                    (device & q->subdevice_mask) == q->subdevice)
 123                        return q;
 124        }
 125        return NULL;
 126}
 127EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
 128
 129/**
 130 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
 131 * @pci: pci_dev handle
 132 * @list: quirk list, terminated by a null entry
 133 *
 134 * Look through the given quirk list and finds a matching entry
 135 * with the same PCI SSID.  When subdevice is 0, all subdevice
 136 * values may match.
 137 *
 138 * Returns the matched entry pointer, or NULL if nothing matched.
 139 */
 140const struct snd_pci_quirk *
 141snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
 142{
 143        return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
 144                                       pci->subsystem_device,
 145                                       list);
 146}
 147EXPORT_SYMBOL(snd_pci_quirk_lookup);
 148#endif
 149