linux/sound/core/misc.c
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   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        int kern_level;
  72        struct va_format vaf;
  73        char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
  74#endif
  75
  76#ifdef CONFIG_SND_DEBUG
  77        if (debug < level)
  78                return;
  79#endif
  80
  81        va_start(args, format);
  82#ifdef CONFIG_SND_VERBOSE_PRINTK
  83        vaf.fmt = format;
  84        vaf.va = &args;
  85
  86        kern_level = printk_get_level(format);
  87        if (kern_level) {
  88                const char *end_of_header = printk_skip_level(format);
  89                memcpy(verbose_fmt, format, end_of_header - format);
  90                vaf.fmt = end_of_header;
  91        } else if (level)
  92                memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1);
  93        printk(verbose_fmt, sanity_file_name(path), line, &vaf);
  94
  95#else
  96        vprintk(format, args);
  97#endif
  98        va_end(args);
  99}
 100EXPORT_SYMBOL_GPL(__snd_printk);
 101#endif
 102
 103#ifdef CONFIG_PCI
 104#include <linux/pci.h>
 105/**
 106 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
 107 * @vendor: PCI SSV id
 108 * @device: PCI SSD id
 109 * @list: quirk list, terminated by a null entry
 110 *
 111 * Look through the given quirk list and finds a matching entry
 112 * with the same PCI SSID.  When subdevice is 0, all subdevice
 113 * values may match.
 114 *
 115 * Returns the matched entry pointer, or NULL if nothing matched.
 116 */
 117const struct snd_pci_quirk *
 118snd_pci_quirk_lookup_id(u16 vendor, u16 device,
 119                        const struct snd_pci_quirk *list)
 120{
 121        const struct snd_pci_quirk *q;
 122
 123        for (q = list; q->subvendor; q++) {
 124                if (q->subvendor != vendor)
 125                        continue;
 126                if (!q->subdevice ||
 127                    (device & q->subdevice_mask) == q->subdevice)
 128                        return q;
 129        }
 130        return NULL;
 131}
 132EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
 133
 134/**
 135 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
 136 * @pci: pci_dev handle
 137 * @list: quirk list, terminated by a null entry
 138 *
 139 * Look through the given quirk list and finds a matching entry
 140 * with the same PCI SSID.  When subdevice is 0, all subdevice
 141 * values may match.
 142 *
 143 * Returns the matched entry pointer, or NULL if nothing matched.
 144 */
 145const struct snd_pci_quirk *
 146snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
 147{
 148        return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
 149                                       pci->subsystem_device,
 150                                       list);
 151}
 152EXPORT_SYMBOL(snd_pci_quirk_lookup);
 153#endif
 154
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