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 23 static int debug = DEFAULT_DEBUG_LEVEL; 24 module_param(debug, int, 0644); 25 MODULE_PARM_DESC(debug, "Debug level (0 = disable)"); 26 27 #endif /* CONFIG_SND_DEBUG */ 28 29 void release_and_free_resource(struct resource *res) 30 { 31 if (res) { 32 release_resource(res); 33 kfree(res); 34 } 35 } 36 EXPORT_SYMBOL(release_and_free_resource); 37 38 #ifdef CONFIG_SND_VERBOSE_PRINTK 39 /* strip the leading path if the given path is absolute */ 40 static 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) 50 void __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 } 92 EXPORT_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 */ 109 const struct snd_pci_quirk * 110 snd_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->subdevice; 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 } 124 EXPORT_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 */ 137 const struct snd_pci_quirk * 138 snd_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 } 146 EXPORT_SYMBOL(snd_pci_quirk_lookup); 147 #endif 148