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/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
62/* print file and line with a certain printk prefix */
63static int print_snd_pfx(unsigned int level, const char *path, int line,
64 const char *format)
65{
66 const char *file = sanity_file_name(path);
67 char tmp[] = "<0>";
68 const char *pfx = level ? KERN_DEBUG : KERN_DEFAULT;
69 int ret = 0;
70
71 if (format[0] == '<' && format[2] == '>') {
72 tmp[1] = format[1];
73 pfx = tmp;
74 ret = 1;
75 }
76 printk("%sALSA %s:%d: ", pfx, file, line);
77 return ret;
78}
79#else
80#define print_snd_pfx(level, path, line, format) 0
81#endif
82
83#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
84void __snd_printk(unsigned int level, const char *path, int line,
85 const char *format, ...)
86{
87 va_list args;
88
89#ifdef CONFIG_SND_DEBUG
90 if (debug < level)
91 return;
92#endif
93 va_start(args, format);
94 if (print_snd_pfx(level, path, line, format))
95 format += 3; /* skip the printk level-prefix */
96 vprintk(format, args);
97 va_end(args);
98}
99EXPORT_SYMBOL_GPL(__snd_printk);
100#endif
101
102#ifdef CONFIG_PCI
103#include <linux/pci.h>
104/**
105 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
106 * @vendor: PCI SSV id
107 * @device: PCI SSD id
108 * @list: quirk list, terminated by a null entry
109 *
110 * Look through the given quirk list and finds a matching entry
111 * with the same PCI SSID. When subdevice is 0, all subdevice
112 * values may match.
113 *
114 * Returns the matched entry pointer, or NULL if nothing matched.
115 */
116const struct snd_pci_quirk *
117snd_pci_quirk_lookup_id(u16 vendor, u16 device,
118 const struct snd_pci_quirk *list)
119{
120 const struct snd_pci_quirk *q;
121
122 for (q = list; q->subvendor; q++) {
123 if (q->subvendor != vendor)
124 continue;
125 if (!q->subdevice ||
126 (device & q->subdevice_mask) == q->subdevice)
127 return q;
128 }
129 return NULL;
130}
131EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
132
133/**
134 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
135 * @pci: pci_dev handle
136 * @list: quirk list, terminated by a null entry
137 *
138 * Look through the given quirk list and finds a matching entry
139 * with the same PCI SSID. When subdevice is 0, all subdevice
140 * values may match.
141 *
142 * Returns the matched entry pointer, or NULL if nothing matched.
143 */
144const struct snd_pci_quirk *
145snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
146{
147 return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
148 pci->subsystem_device,
149 list);
150}
151EXPORT_SYMBOL(snd_pci_quirk_lookup);
152#endif