Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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