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misc.c

/*
 *  Misc and compatibility things
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/init.h>
#include <linux/time.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <sound/core.h>

#ifdef CONFIG_SND_DEBUG

#ifdef CONFIG_SND_DEBUG_VERBOSE
#define DEFAULT_DEBUG_LEVEL   2
#else
#define DEFAULT_DEBUG_LEVEL   1
#endif

static int debug = DEFAULT_DEBUG_LEVEL;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level (0 = disable)");

#endif /* CONFIG_SND_DEBUG */

void release_and_free_resource(struct resource *res)
{
      if (res) {
            release_resource(res);
            kfree(res);
      }
}

EXPORT_SYMBOL(release_and_free_resource);

#ifdef CONFIG_SND_VERBOSE_PRINTK
/* strip the leading path if the given path is absolute */
static const char *sanity_file_name(const char *path)
{
      if (*path == '/')
            return strrchr(path, '/') + 1;
      else
            return path;
}

/* print file and line with a certain printk prefix */
static int print_snd_pfx(unsigned int level, const char *path, int line,
                   const char *format)
{
      const char *file = sanity_file_name(path);
      char tmp[] = "<0>";
      const char *pfx = level ? KERN_DEBUG : KERN_DEFAULT;
      int ret = 0;

      if (format[0] == '<' && format[2] == '>') {
            tmp[1] = format[1];
            pfx = tmp;
            ret = 1;
      }
      printk("%sALSA %s:%d: ", pfx, file, line);
      return ret;
}
#else
#define print_snd_pfx(level, path, line, format)      0
#endif

#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
void __snd_printk(unsigned int level, const char *path, int line,
              const char *format, ...)
{
      va_list args;
      
#ifdef CONFIG_SND_DEBUG 
      if (debug < level)
            return;
#endif
      va_start(args, format);
      if (print_snd_pfx(level, path, line, format))
            format += 3; /* skip the printk level-prefix */
      vprintk(format, args);
      va_end(args);
}
EXPORT_SYMBOL_GPL(__snd_printk);
#endif

#ifdef CONFIG_PCI
#include <linux/pci.h>
/**
 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
 * @vendor: PCI SSV id
 * @device: PCI SSD id
 * @list: quirk list, terminated by a null entry
 *
 * Look through the given quirk list and finds a matching entry
 * with the same PCI SSID.  When subdevice is 0, all subdevice
 * values may match.
 *
 * Returns the matched entry pointer, or NULL if nothing matched.
 */
const struct snd_pci_quirk *
snd_pci_quirk_lookup_id(u16 vendor, u16 device,
                  const struct snd_pci_quirk *list)
{
      const struct snd_pci_quirk *q;

      for (q = list; q->subvendor; q++) {
            if (q->subvendor != vendor)
                  continue;
            if (!q->subdevice ||
                (device & q->subdevice_mask) == q->subdevice)
                  return q;
      }
      return NULL;
}
EXPORT_SYMBOL(snd_pci_quirk_lookup_id);

/**
 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
 * @pci: pci_dev handle
 * @list: quirk list, terminated by a null entry
 *
 * Look through the given quirk list and finds a matching entry
 * with the same PCI SSID.  When subdevice is 0, all subdevice
 * values may match.
 *
 * Returns the matched entry pointer, or NULL if nothing matched.
 */
const struct snd_pci_quirk *
snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
{
      return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
                               pci->subsystem_device,
                               list);
}
EXPORT_SYMBOL(snd_pci_quirk_lookup);
#endif

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