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Diffstat (limited to 'sound/core/misc.c')
| -rw-r--r-- | sound/core/misc.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/sound/core/misc.c b/sound/core/misc.c new file mode 100644 index 000000000..0f818d593 --- /dev/null +++ b/sound/core/misc.c @@ -0,0 +1,162 @@ +/* + * Misc and compatibility things + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/init.h> +#include <linux/export.h> +#include <linux/moduleparam.h> +#include <linux/time.h> +#include <linux/slab.h> +#include <linux/ioport.h> +#include <sound/core.h> + +#ifdef CONFIG_SND_DEBUG + +#ifdef CONFIG_SND_DEBUG_VERBOSE +#define DEFAULT_DEBUG_LEVEL 2 +#else +#define DEFAULT_DEBUG_LEVEL 1 +#endif + +static int debug = DEFAULT_DEBUG_LEVEL; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Debug level (0 = disable)"); + +#endif /* CONFIG_SND_DEBUG */ + +void release_and_free_resource(struct resource *res) +{ + if (res) { + release_resource(res); + kfree(res); + } +} +EXPORT_SYMBOL(release_and_free_resource); + +#ifdef CONFIG_SND_VERBOSE_PRINTK +/* strip the leading path if the given path is absolute */ +static const char *sanity_file_name(const char *path) +{ + if (*path == '/') + return strrchr(path, '/') + 1; + else + return path; +} +#endif + +#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK) +void __snd_printk(unsigned int level, const char *path, int line, + const char *format, ...) +{ + va_list args; +#ifdef CONFIG_SND_VERBOSE_PRINTK + int kern_level; + struct va_format vaf; + char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV"; + bool level_found = false; +#endif + +#ifdef CONFIG_SND_DEBUG + if (debug < level) + return; +#endif + + va_start(args, format); +#ifdef CONFIG_SND_VERBOSE_PRINTK + vaf.fmt = format; + vaf.va = &args; + + while ((kern_level = printk_get_level(vaf.fmt)) != 0) { + const char *end_of_header = printk_skip_level(vaf.fmt); + + /* Ignore KERN_CONT. We print filename:line for each piece. */ + if (kern_level >= '0' && kern_level <= '7') { + memcpy(verbose_fmt, vaf.fmt, end_of_header - vaf.fmt); + level_found = true; + } + + vaf.fmt = end_of_header; + } + + if (!level_found && level) + memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1); + + printk(verbose_fmt, sanity_file_name(path), line, &vaf); +#else + vprintk(format, args); +#endif + va_end(args); +} +EXPORT_SYMBOL_GPL(__snd_printk); +#endif + +#ifdef CONFIG_PCI +#include <linux/pci.h> +/** + * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list + * @vendor: PCI SSV id + * @device: PCI SSD id + * @list: quirk list, terminated by a null entry + * + * Look through the given quirk list and finds a matching entry + * with the same PCI SSID. When subdevice is 0, all subdevice + * values may match. + * + * Returns the matched entry pointer, or NULL if nothing matched. + */ +const struct snd_pci_quirk * +snd_pci_quirk_lookup_id(u16 vendor, u16 device, + const struct snd_pci_quirk *list) +{ + const struct snd_pci_quirk *q; + + for (q = list; q->subvendor; q++) { + if (q->subvendor != vendor) + continue; + if (!q->subdevice || + (device & q->subdevice_mask) == q->subdevice) + return q; + } + return NULL; +} +EXPORT_SYMBOL(snd_pci_quirk_lookup_id); + +/** + * snd_pci_quirk_lookup - look up a PCI SSID quirk list + * @pci: pci_dev handle + * @list: quirk list, terminated by a null entry + * + * Look through the given quirk list and finds a matching entry + * with the same PCI SSID. When subdevice is 0, all subdevice + * values may match. + * + * Returns the matched entry pointer, or NULL if nothing matched. + */ +const struct snd_pci_quirk * +snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list) +{ + if (!pci) + return NULL; + return snd_pci_quirk_lookup_id(pci->subsystem_vendor, + pci->subsystem_device, + list); +} +EXPORT_SYMBOL(snd_pci_quirk_lookup); +#endif |