Root/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/slab.h>
25#include <linux/ioport.h>
26#include <sound/core.h>
27
28#ifdef CONFIG_SND_DEBUG
29
30#ifdef CONFIG_SND_DEBUG_VERBOSE
31#define DEFAULT_DEBUG_LEVEL 2
32#else
33#define DEFAULT_DEBUG_LEVEL 1
34#endif
35
36static int debug = DEFAULT_DEBUG_LEVEL;
37module_param(debug, int, 0644);
38MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
39
40#endif /* CONFIG_SND_DEBUG */
41
42void release_and_free_resource(struct resource *res)
43{
44    if (res) {
45        release_resource(res);
46        kfree(res);
47    }
48}
49
50EXPORT_SYMBOL(release_and_free_resource);
51
52#ifdef CONFIG_SND_VERBOSE_PRINTK
53/* strip the leading path if the given path is absolute */
54static const char *sanity_file_name(const char *path)
55{
56    if (*path == '/')
57        return strrchr(path, '/') + 1;
58    else
59        return path;
60}
61#endif
62
63#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
64void __snd_printk(unsigned int level, const char *path, int line,
65          const char *format, ...)
66{
67    va_list args;
68#ifdef CONFIG_SND_VERBOSE_PRINTK
69    struct va_format vaf;
70    char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
71#endif
72
73#ifdef CONFIG_SND_DEBUG
74    if (debug < level)
75        return;
76#endif
77
78    va_start(args, format);
79#ifdef CONFIG_SND_VERBOSE_PRINTK
80    vaf.fmt = format;
81    vaf.va = &args;
82    if (format[0] == '<' && format[2] == '>') {
83        memcpy(verbose_fmt, format, 3);
84        vaf.fmt = format + 3;
85    } else if (level)
86        memcpy(verbose_fmt, KERN_DEBUG, 3);
87    printk(verbose_fmt, sanity_file_name(path), line, &vaf);
88#else
89    vprintk(format, args);
90#endif
91    va_end(args);
92}
93EXPORT_SYMBOL_GPL(__snd_printk);
94#endif
95
96#ifdef CONFIG_PCI
97#include <linux/pci.h>
98/**
99 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
100 * @vendor: PCI SSV id
101 * @device: PCI SSD id
102 * @list: quirk list, terminated by a null entry
103 *
104 * Look through the given quirk list and finds a matching entry
105 * with the same PCI SSID. When subdevice is 0, all subdevice
106 * values may match.
107 *
108 * Returns the matched entry pointer, or NULL if nothing matched.
109 */
110const struct snd_pci_quirk *
111snd_pci_quirk_lookup_id(u16 vendor, u16 device,
112            const struct snd_pci_quirk *list)
113{
114    const struct snd_pci_quirk *q;
115
116    for (q = list; q->subvendor; q++) {
117        if (q->subvendor != vendor)
118            continue;
119        if (!q->subdevice ||
120            (device & q->subdevice_mask) == q->subdevice)
121            return q;
122    }
123    return NULL;
124}
125EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
126
127/**
128 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
129 * @pci: pci_dev handle
130 * @list: quirk list, terminated by a null entry
131 *
132 * Look through the given quirk list and finds a matching entry
133 * with the same PCI SSID. When subdevice is 0, all subdevice
134 * values may match.
135 *
136 * Returns the matched entry pointer, or NULL if nothing matched.
137 */
138const struct snd_pci_quirk *
139snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
140{
141    return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
142                       pci->subsystem_device,
143                       list);
144}
145EXPORT_SYMBOL(snd_pci_quirk_lookup);
146#endif
147

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