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TOMOYO Linux Cross Reference
Linux/sound/core/misc.c

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  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 
 38 static int debug = DEFAULT_DEBUG_LEVEL;
 39 module_param(debug, int, 0644);
 40 MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
 41 
 42 #endif /* CONFIG_SND_DEBUG */
 43 
 44 void release_and_free_resource(struct resource *res)
 45 {
 46         if (res) {
 47                 release_resource(res);
 48                 kfree(res);
 49         }
 50 }
 51 EXPORT_SYMBOL(release_and_free_resource);
 52 
 53 #ifdef CONFIG_SND_VERBOSE_PRINTK
 54 /* strip the leading path if the given path is absolute */
 55 static 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)
 65 void __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 >= '' && 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 }
107 EXPORT_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  */
124 const struct snd_pci_quirk *
125 snd_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 }
139 EXPORT_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  */
152 const struct snd_pci_quirk *
153 snd_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 }
161 EXPORT_SYMBOL(snd_pci_quirk_lookup);
162 #endif
163 

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