misc.c

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/*
 *  Misc and compatibility things
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
 *
 *
 *   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/export.h>
#include <linux/moduleparam.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;
}
#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_VERBOSE_PRINTK
    int kern_level;
    struct va_format vaf;
    char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
#endif

#ifdef CONFIG_SND_DEBUG
    if (debug < level)
        return;
#endif

    va_start(args, format);
#ifdef CONFIG_SND_VERBOSE_PRINTK
    vaf.fmt = format;
    vaf.va = &args;

    kern_level = printk_get_level(format);
    if (kern_level) {
        const char *end_of_header = printk_skip_level(format);
        memcpy(verbose_fmt, format, end_of_header - format);
        vaf.fmt = end_of_header;
    } else if (level)
        memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1);
    printk(verbose_fmt, sanity_file_name(path), line, &vaf);

#else
    vprintk(format, args);
#endif
    va_end(args);
}
EXPORT_SYMBOL_GPL(__snd_printk);
#endif

#ifdef CONFIG_PCI
#include <linux/pci.h>
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);

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