sound/core/misc.c

   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
  36 static int debug = DEFAULT_DEBUG_LEVEL;
  37 module_param(debug, int, 0644);
  38 MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
  39
  40 #endif /* CONFIG_SND_DEBUG */
  41
  42 void release_and_free_resource(struct resource *res)
  43 {
  44         if (res) {
  45                 release_resource(res);
  46                 kfree(res);
  47         }
  48 }
  49
  50 EXPORT_SYMBOL(release_and_free_resource);
  51
  52 #ifdef CONFIG_SND_VERBOSE_PRINTK
  53 /* strip the leading path if the given path is absolute */
  54 static 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 */
  63 static 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)
  84 void __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 }
  99 EXPORT_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  */
 116 const struct snd_pci_quirk *
 117 snd_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 }
 131 EXPORT_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  */
 144 const struct snd_pci_quirk *
 145 snd_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 }
 151 EXPORT_SYMBOL(snd_pci_quirk_lookup);
 152 #endif