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 >= '0' && 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