mirror of https://gitee.com/openkylin/linux.git
148 lines
3.4 KiB
C
148 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Misc and compatibility things
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/moduleparam.h>
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#include <linux/time.h>
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#include <linux/slab.h>
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#include <linux/ioport.h>
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#include <sound/core.h>
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#ifdef CONFIG_SND_DEBUG
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#ifdef CONFIG_SND_DEBUG_VERBOSE
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#define DEFAULT_DEBUG_LEVEL 2
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#else
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#define DEFAULT_DEBUG_LEVEL 1
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#endif
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static int debug = DEFAULT_DEBUG_LEVEL;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
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#endif /* CONFIG_SND_DEBUG */
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void release_and_free_resource(struct resource *res)
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{
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if (res) {
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release_resource(res);
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kfree(res);
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}
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}
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EXPORT_SYMBOL(release_and_free_resource);
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#ifdef CONFIG_SND_VERBOSE_PRINTK
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/* strip the leading path if the given path is absolute */
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static const char *sanity_file_name(const char *path)
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{
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if (*path == '/')
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return strrchr(path, '/') + 1;
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else
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return path;
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}
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#endif
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#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
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void __snd_printk(unsigned int level, const char *path, int line,
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const char *format, ...)
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{
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va_list args;
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#ifdef CONFIG_SND_VERBOSE_PRINTK
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int kern_level;
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struct va_format vaf;
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char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
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bool level_found = false;
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#endif
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#ifdef CONFIG_SND_DEBUG
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if (debug < level)
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return;
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#endif
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va_start(args, format);
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#ifdef CONFIG_SND_VERBOSE_PRINTK
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vaf.fmt = format;
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vaf.va = &args;
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while ((kern_level = printk_get_level(vaf.fmt)) != 0) {
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const char *end_of_header = printk_skip_level(vaf.fmt);
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/* Ignore KERN_CONT. We print filename:line for each piece. */
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if (kern_level >= '0' && kern_level <= '7') {
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memcpy(verbose_fmt, vaf.fmt, end_of_header - vaf.fmt);
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level_found = true;
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}
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vaf.fmt = end_of_header;
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}
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if (!level_found && level)
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memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1);
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printk(verbose_fmt, sanity_file_name(path), line, &vaf);
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#else
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vprintk(format, args);
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#endif
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va_end(args);
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}
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EXPORT_SYMBOL_GPL(__snd_printk);
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#endif
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#ifdef CONFIG_PCI
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#include <linux/pci.h>
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/**
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* snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
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* @vendor: PCI SSV id
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* @device: PCI SSD id
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* @list: quirk list, terminated by a null entry
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*
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* Look through the given quirk list and finds a matching entry
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* with the same PCI SSID. When subdevice is 0, all subdevice
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* values may match.
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*
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* Returns the matched entry pointer, or NULL if nothing matched.
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*/
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const struct snd_pci_quirk *
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snd_pci_quirk_lookup_id(u16 vendor, u16 device,
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const struct snd_pci_quirk *list)
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{
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const struct snd_pci_quirk *q;
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for (q = list; q->subvendor; q++) {
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if (q->subvendor != vendor)
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continue;
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if (!q->subdevice ||
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(device & q->subdevice_mask) == q->subdevice)
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return q;
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}
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return NULL;
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}
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EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
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/**
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* snd_pci_quirk_lookup - look up a PCI SSID quirk list
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* @pci: pci_dev handle
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* @list: quirk list, terminated by a null entry
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*
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* Look through the given quirk list and finds a matching entry
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* with the same PCI SSID. When subdevice is 0, all subdevice
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* values may match.
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*
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* Returns the matched entry pointer, or NULL if nothing matched.
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*/
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const struct snd_pci_quirk *
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snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
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{
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if (!pci)
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return NULL;
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return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
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pci->subsystem_device,
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list);
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}
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EXPORT_SYMBOL(snd_pci_quirk_lookup);
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#endif
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