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/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
  35static int debug = DEFAULT_DEBUG_LEVEL;
  36module_param(debug, int, 0644);
  37MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
  38
  39#endif /* CONFIG_SND_DEBUG */
  40
  41void release_and_free_resource(struct resource *res)
  42{
  43        if (res) {
  44                release_resource(res);
  45                kfree(res);
  46        }
  47}
  48
  49EXPORT_SYMBOL(release_and_free_resource);
  50
  51#ifdef CONFIG_SND_VERBOSE_PRINTK
  52/* strip the leading path if the given path is absolute */
  53static 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 */
  62static 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)
  83void __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}
  98EXPORT_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 */
 114const struct snd_pci_quirk *
 115snd_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}
 128EXPORT_SYMBOL(snd_pci_quirk_lookup);
 129#endif
 130