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}
  51EXPORT_SYMBOL(release_and_free_resource);
  52
  53#ifdef CONFIG_SND_VERBOSE_PRINTK
  54/* strip the leading path if the given path is absolute */
  55static 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)
  65void __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        int kern_level;
  71        struct va_format vaf;
  72        char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
  73        bool level_found = false;
  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        while ((kern_level = printk_get_level(vaf.fmt)) != 0) {
  87                const char *end_of_header = printk_skip_level(vaf.fmt);
  88
  89                /* Ignore KERN_CONT. We print filename:line for each piece. */
  90                if (kern_level >= '0' && kern_level <= '7') {
  91                        memcpy(verbose_fmt, vaf.fmt, end_of_header - vaf.fmt);
  92                        level_found = true;
  93                }
  94
  95                vaf.fmt = end_of_header;
  96        }
  97
  98        if (!level_found && level)
  99                memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1);
 100
 101        printk(verbose_fmt, sanity_file_name(path), line, &vaf);
 102#else
 103        vprintk(format, args);
 104#endif
 105        va_end(args);
 106}
 107EXPORT_SYMBOL_GPL(__snd_printk);
 108#endif
 109
 110#ifdef CONFIG_PCI
 111#include <linux/pci.h>
 112/**
 113 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
 114 * @vendor: PCI SSV id
 115 * @device: PCI SSD id
 116 * @list: quirk list, terminated by a null entry
 117 *
 118 * Look through the given quirk list and finds a matching entry
 119 * with the same PCI SSID.  When subdevice is 0, all subdevice
 120 * values may match.
 121 *
 122 * Returns the matched entry pointer, or NULL if nothing matched.
 123 */
 124const struct snd_pci_quirk *
 125snd_pci_quirk_lookup_id(u16 vendor, u16 device,
 126                        const struct snd_pci_quirk *list)
 127{
 128        const struct snd_pci_quirk *q;
 129
 130        for (q = list; q->subvendor; q++) {
 131                if (q->subvendor != vendor)
 132                        continue;
 133                if (!q->subdevice ||
 134                    (device & q->subdevice_mask) == q->subdevice)
 135                        return q;
 136        }
 137        return NULL;
 138}
 139EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
 140
 141/**
 142 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
 143 * @pci: pci_dev handle
 144 * @list: quirk list, terminated by a null entry
 145 *
 146 * Look through the given quirk list and finds a matching entry
 147 * with the same PCI SSID.  When subdevice is 0, all subdevice
 148 * values may match.
 149 *
 150 * Returns the matched entry pointer, or NULL if nothing matched.
 151 */
 152const struct snd_pci_quirk *
 153snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
 154{
 155        if (!pci)
 156                return NULL;
 157        return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
 158                                       pci->subsystem_device,
 159                                       list);
 160}
 161EXPORT_SYMBOL(snd_pci_quirk_lookup);
 162#endif
 163