xref: /openbmc/linux/sound/core/misc.c (revision 9d56dd3b083a3bec56e9da35ce07baca81030b03)
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/ioport.h>
25 #include <sound/core.h>
26 
27 #ifdef CONFIG_SND_DEBUG
28 
29 #ifdef CONFIG_SND_DEBUG_VERBOSE
30 #define DEFAULT_DEBUG_LEVEL	2
31 #else
32 #define DEFAULT_DEBUG_LEVEL	1
33 #endif
34 
35 static int debug = DEFAULT_DEBUG_LEVEL;
36 module_param(debug, int, 0644);
37 MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
38 
39 #endif /* CONFIG_SND_DEBUG */
40 
41 void release_and_free_resource(struct resource *res)
42 {
43 	if (res) {
44 		release_resource(res);
45 		kfree(res);
46 	}
47 }
48 
49 EXPORT_SYMBOL(release_and_free_resource);
50 
51 #ifdef CONFIG_SND_VERBOSE_PRINTK
52 /* strip the leading path if the given path is absolute */
53 static const char *sanity_file_name(const char *path)
54 {
55 	if (*path == '/')
56 		return strrchr(path, '/') + 1;
57 	else
58 		return path;
59 }
60 
61 /* print file and line with a certain printk prefix */
62 static int print_snd_pfx(unsigned int level, const char *path, int line,
63 			 const char *format)
64 {
65 	const char *file = sanity_file_name(path);
66 	char tmp[] = "<0>";
67 	const char *pfx = level ? KERN_DEBUG : KERN_DEFAULT;
68 	int ret = 0;
69 
70 	if (format[0] == '<' && format[2] == '>') {
71 		tmp[1] = format[1];
72 		pfx = tmp;
73 		ret = 1;
74 	}
75 	printk("%sALSA %s:%d: ", pfx, file, line);
76 	return ret;
77 }
78 #else
79 #define print_snd_pfx(level, path, line, format)	0
80 #endif
81 
82 #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
83 void __snd_printk(unsigned int level, const char *path, int line,
84 		  const char *format, ...)
85 {
86 	va_list args;
87 
88 #ifdef CONFIG_SND_DEBUG
89 	if (debug < level)
90 		return;
91 #endif
92 	va_start(args, format);
93 	if (print_snd_pfx(level, path, line, format))
94 		format += 3; /* skip the printk level-prefix */
95 	vprintk(format, args);
96 	va_end(args);
97 }
98 EXPORT_SYMBOL_GPL(__snd_printk);
99 #endif
100 
101 #ifdef CONFIG_PCI
102 #include <linux/pci.h>
103 /**
104  * snd_pci_quirk_lookup - look up a PCI SSID quirk list
105  * @pci: pci_dev handle
106  * @list: quirk list, terminated by a null entry
107  *
108  * Look through the given quirk list and finds a matching entry
109  * with the same PCI SSID.  When subdevice is 0, all subdevice
110  * values may match.
111  *
112  * Returns the matched entry pointer, or NULL if nothing matched.
113  */
114 const struct snd_pci_quirk *
115 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
116 {
117 	const struct snd_pci_quirk *q;
118 
119 	for (q = list; q->subvendor; q++) {
120 		if (q->subvendor != pci->subsystem_vendor)
121 			continue;
122 		if (!q->subdevice ||
123 		    (pci->subsystem_device & q->subdevice_mask) == q->subdevice)
124 			return q;
125 	}
126 	return NULL;
127 }
128 EXPORT_SYMBOL(snd_pci_quirk_lookup);
129 #endif
130