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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Misc and compatibility things
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 */
6
7#include <linux/init.h>
8#include <linux/export.h>
9#include <linux/moduleparam.h>
10#include <linux/time.h>
11#include <linux/slab.h>
12#include <linux/ioport.h>
13#include <sound/core.h>
14
15#ifdef CONFIG_SND_DEBUG
16
17#ifdef CONFIG_SND_DEBUG_VERBOSE
18#define DEFAULT_DEBUG_LEVEL 2
19#else
20#define DEFAULT_DEBUG_LEVEL 1
21#endif
22
23static int debug = DEFAULT_DEBUG_LEVEL;
24module_param(debug, int, 0644);
25MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
26
27#endif /* CONFIG_SND_DEBUG */
28
29void release_and_free_resource(struct resource *res)
30{
31 if (res) {
32 release_resource(res);
33 kfree(res);
34 }
35}
36EXPORT_SYMBOL(release_and_free_resource);
37
38#ifdef CONFIG_SND_VERBOSE_PRINTK
39/* strip the leading path if the given path is absolute */
40static const char *sanity_file_name(const char *path)
41{
42 if (*path == '/')
43 return strrchr(path, '/') + 1;
44 else
45 return path;
46}
47#endif
48
49#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
50void __snd_printk(unsigned int level, const char *path, int line,
51 const char *format, ...)
52{
53 va_list args;
54#ifdef CONFIG_SND_VERBOSE_PRINTK
55 int kern_level;
56 struct va_format vaf;
57 char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
58 bool level_found = false;
59#endif
60
61#ifdef CONFIG_SND_DEBUG
62 if (debug < level)
63 return;
64#endif
65
66 va_start(args, format);
67#ifdef CONFIG_SND_VERBOSE_PRINTK
68 vaf.fmt = format;
69 vaf.va = &args;
70
71 while ((kern_level = printk_get_level(vaf.fmt)) != 0) {
72 const char *end_of_header = printk_skip_level(vaf.fmt);
73
74 /* Ignore KERN_CONT. We print filename:line for each piece. */
75 if (kern_level >= '0' && kern_level <= '7') {
76 memcpy(verbose_fmt, vaf.fmt, end_of_header - vaf.fmt);
77 level_found = true;
78 }
79
80 vaf.fmt = end_of_header;
81 }
82
83 if (!level_found && level)
84 memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1);
85
86 printk(verbose_fmt, sanity_file_name(path), line, &vaf);
87#else
88 vprintk(format, args);
89#endif
90 va_end(args);
91}
92EXPORT_SYMBOL_GPL(__snd_printk);
93#endif
94
95#ifdef CONFIG_PCI
96#include <linux/pci.h>
97/**
98 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
99 * @vendor: PCI SSV id
100 * @device: PCI SSD id
101 * @list: quirk list, terminated by a null entry
102 *
103 * Look through the given quirk list and finds a matching entry
104 * with the same PCI SSID. When subdevice is 0, all subdevice
105 * values may match.
106 *
107 * Returns the matched entry pointer, or NULL if nothing matched.
108 */
109const struct snd_pci_quirk *
110snd_pci_quirk_lookup_id(u16 vendor, u16 device,
111 const struct snd_pci_quirk *list)
112{
113 const struct snd_pci_quirk *q;
114
115 for (q = list; q->subvendor; q++) {
116 if (q->subvendor != vendor)
117 continue;
118 if (!q->subdevice ||
119 (device & q->subdevice_mask) == q->subdevice)
120 return q;
121 }
122 return NULL;
123}
124EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
125
126/**
127 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
128 * @pci: pci_dev handle
129 * @list: quirk list, terminated by a null entry
130 *
131 * Look through the given quirk list and finds a matching entry
132 * with the same PCI SSID. When subdevice is 0, all subdevice
133 * values may match.
134 *
135 * Returns the matched entry pointer, or NULL if nothing matched.
136 */
137const struct snd_pci_quirk *
138snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
139{
140 if (!pci)
141 return NULL;
142 return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
143 pci->subsystem_device,
144 list);
145}
146EXPORT_SYMBOL(snd_pci_quirk_lookup);
147#endif
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}
51
52EXPORT_SYMBOL(release_and_free_resource);
53
54#ifdef CONFIG_SND_VERBOSE_PRINTK
55/* strip the leading path if the given path is absolute */
56static const char *sanity_file_name(const char *path)
57{
58 if (*path == '/')
59 return strrchr(path, '/') + 1;
60 else
61 return path;
62}
63#endif
64
65#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
66void __snd_printk(unsigned int level, const char *path, int line,
67 const char *format, ...)
68{
69 va_list args;
70#ifdef CONFIG_SND_VERBOSE_PRINTK
71 int kern_level;
72 struct va_format vaf;
73 char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
74 bool level_found = false;
75#endif
76
77#ifdef CONFIG_SND_DEBUG
78 if (debug < level)
79 return;
80#endif
81
82 va_start(args, format);
83#ifdef CONFIG_SND_VERBOSE_PRINTK
84 vaf.fmt = format;
85 vaf.va = &args;
86
87 while ((kern_level = printk_get_level(vaf.fmt)) != 0) {
88 const char *end_of_header = printk_skip_level(vaf.fmt);
89
90 /* Ignore KERN_CONT. We print filename:line for each piece. */
91 if (kern_level >= '0' && kern_level <= '7') {
92 memcpy(verbose_fmt, vaf.fmt, end_of_header - vaf.fmt);
93 level_found = true;
94 }
95
96 vaf.fmt = end_of_header;
97 }
98
99 if (!level_found && level)
100 memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1);
101
102 printk(verbose_fmt, sanity_file_name(path), line, &vaf);
103#else
104 vprintk(format, args);
105#endif
106 va_end(args);
107}
108EXPORT_SYMBOL_GPL(__snd_printk);
109#endif
110
111#ifdef CONFIG_PCI
112#include <linux/pci.h>
113/**
114 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
115 * @vendor: PCI SSV id
116 * @device: PCI SSD id
117 * @list: quirk list, terminated by a null entry
118 *
119 * Look through the given quirk list and finds a matching entry
120 * with the same PCI SSID. When subdevice is 0, all subdevice
121 * values may match.
122 *
123 * Returns the matched entry pointer, or NULL if nothing matched.
124 */
125const struct snd_pci_quirk *
126snd_pci_quirk_lookup_id(u16 vendor, u16 device,
127 const struct snd_pci_quirk *list)
128{
129 const struct snd_pci_quirk *q;
130
131 for (q = list; q->subvendor; q++) {
132 if (q->subvendor != vendor)
133 continue;
134 if (!q->subdevice ||
135 (device & q->subdevice_mask) == q->subdevice)
136 return q;
137 }
138 return NULL;
139}
140EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
141
142/**
143 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
144 * @pci: pci_dev handle
145 * @list: quirk list, terminated by a null entry
146 *
147 * Look through the given quirk list and finds a matching entry
148 * with the same PCI SSID. When subdevice is 0, all subdevice
149 * values may match.
150 *
151 * Returns the matched entry pointer, or NULL if nothing matched.
152 */
153const struct snd_pci_quirk *
154snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
155{
156 if (!pci)
157 return NULL;
158 return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
159 pci->subsystem_device,
160 list);
161}
162EXPORT_SYMBOL(snd_pci_quirk_lookup);
163#endif