root/include/sound/core.h

INCLUDED FROM

DEFINITIONS

1. snd_power_lock
2. snd_power_unlock
3. snd_power_get_state
4. snd_power_change_state
5. snd_power_wait
6. snd_card_get_device_link
7. snd_register_device
8. snd_minor_info_oss_init
9. snd_minor_info_oss_done
10. __printf
11. __printf
12. snd_printd_ratelimit
13. __printf
14. snd_pci_quirk_lookup
15. snd_pci_quirk_lookup_id

#ifndef __SOUND_CORE_H
#define __SOUND_CORE_H

/*
 *  Main header file for the ALSA driver
 *  Copyright (c) 1994-2001 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/device.h>
#include <linux/sched.h>                /* wake_up() */
#include <linux/mutex.h>                /* struct mutex */
#include <linux/rwsem.h>                /* struct rw_semaphore */
#include <linux/pm.h>                   /* pm_message_t */
#include <linux/stringify.h>
#include <linux/printk.h>

/* number of supported soundcards */
#ifdef CONFIG_SND_DYNAMIC_MINORS
#define SNDRV_CARDS CONFIG_SND_MAX_CARDS
#else
#define SNDRV_CARDS 8           /* don't change - minor numbers */
#endif

#define CONFIG_SND_MAJOR        116     /* standard configuration */

/* forward declarations */
struct pci_dev;
struct module;
struct completion;

/* device allocation stuff */

/* type of the object used in snd_device_*()
 * this also defines the calling order
 */
enum snd_device_type {
        SNDRV_DEV_LOWLEVEL,
        SNDRV_DEV_CONTROL,
        SNDRV_DEV_INFO,
        SNDRV_DEV_BUS,
        SNDRV_DEV_CODEC,
        SNDRV_DEV_PCM,
        SNDRV_DEV_COMPRESS,
        SNDRV_DEV_RAWMIDI,
        SNDRV_DEV_TIMER,
        SNDRV_DEV_SEQUENCER,
        SNDRV_DEV_HWDEP,
        SNDRV_DEV_JACK,
};

enum snd_device_state {
        SNDRV_DEV_BUILD,
        SNDRV_DEV_REGISTERED,
        SNDRV_DEV_DISCONNECTED,
};

struct snd_device;

struct snd_device_ops {
        int (*dev_free)(struct snd_device *dev);
        int (*dev_register)(struct snd_device *dev);
        int (*dev_disconnect)(struct snd_device *dev);
};

struct snd_device {
        struct list_head list;          /* list of registered devices */
        struct snd_card *card;          /* card which holds this device */
        enum snd_device_state state;    /* state of the device */
        enum snd_device_type type;      /* device type */
        void *device_data;              /* device structure */
        struct snd_device_ops *ops;     /* operations */
};

#define snd_device(n) list_entry(n, struct snd_device, list)

/* main structure for soundcard */

struct snd_card {
        int number;                     /* number of soundcard (index to
                                                                snd_cards) */

        char id[16];                    /* id string of this card */
        char driver[16];                /* driver name */
        char shortname[32];             /* short name of this soundcard */
        char longname[80];              /* name of this soundcard */
        char mixername[80];             /* mixer name */
        char components[128];           /* card components delimited with
                                                                space */
        struct module *module;          /* top-level module */

        void *private_data;             /* private data for soundcard */
        void (*private_free) (struct snd_card *card); /* callback for freeing of
                                                                private data */
        struct list_head devices;       /* devices */

        unsigned int last_numid;        /* last used numeric ID */
        struct rw_semaphore controls_rwsem;     /* controls list lock */
        rwlock_t ctl_files_rwlock;      /* ctl_files list lock */
        int controls_count;             /* count of all controls */
        int user_ctl_count;             /* count of all user controls */
        struct list_head controls;      /* all controls for this card */
        struct list_head ctl_files;     /* active control files */
        struct mutex user_ctl_lock;     /* protects user controls against
                                           concurrent access */

        struct snd_info_entry *proc_root;       /* root for soundcard specific files */
        struct snd_info_entry *proc_id; /* the card id */
        struct proc_dir_entry *proc_root_link;  /* number link to real id */

        struct list_head files_list;    /* all files associated to this card */
        struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown
                                                                state */
        spinlock_t files_lock;          /* lock the files for this card */
        int shutdown;                   /* this card is going down */
        struct completion *release_completion;
        struct device *dev;             /* device assigned to this card */
        struct device card_dev;         /* cardX object for sysfs */
        bool registered;                /* card_dev is registered? */

#ifdef CONFIG_PM
        unsigned int power_state;       /* power state */
        struct mutex power_lock;        /* power lock */
        wait_queue_head_t power_sleep;
#endif

#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
        struct snd_mixer_oss *mixer_oss;
        int mixer_oss_change_count;
#endif
};

#define dev_to_snd_card(p)      container_of(p, struct snd_card, card_dev)

#ifdef CONFIG_PM
static inline void snd_power_lock(struct snd_card *card)
{
        mutex_lock(&card->power_lock);
}

static inline void snd_power_unlock(struct snd_card *card)
{
        mutex_unlock(&card->power_lock);
}

static inline unsigned int snd_power_get_state(struct snd_card *card)
{
        return card->power_state;
}

static inline void snd_power_change_state(struct snd_card *card, unsigned int state)
{
        card->power_state = state;
        wake_up(&card->power_sleep);
}

/* init.c */
int snd_power_wait(struct snd_card *card, unsigned int power_state);

#else /* ! CONFIG_PM */

#define snd_power_lock(card)            do { (void)(card); } while (0)
#define snd_power_unlock(card)          do { (void)(card); } while (0)
static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; }
#define snd_power_get_state(card)       ({ (void)(card); SNDRV_CTL_POWER_D0; })
#define snd_power_change_state(card, state)     do { (void)(card); } while (0)

#endif /* CONFIG_PM */

struct snd_minor {
        int type;                       /* SNDRV_DEVICE_TYPE_XXX */
        int card;                       /* card number */
        int device;                     /* device number */
        const struct file_operations *f_ops;    /* file operations */
        void *private_data;             /* private data for f_ops->open */
        struct device *dev;             /* device for sysfs */
        struct snd_card *card_ptr;      /* assigned card instance */
};

/* return a device pointer linked to each sound device as a parent */
static inline struct device *snd_card_get_device_link(struct snd_card *card)
{
        return card ? &card->card_dev : NULL;
}

/* sound.c */

extern int snd_major;
extern int snd_ecards_limit;
extern struct class *sound_class;

void snd_request_card(int card);

int snd_register_device_for_dev(int type, struct snd_card *card,
                                int dev,
                                const struct file_operations *f_ops,
                                void *private_data,
                                const char *name,
                                struct device *device);

/**
 * snd_register_device - Register the ALSA device file for the card
 * @type: the device type, SNDRV_DEVICE_TYPE_XXX
 * @card: the card instance
 * @dev: the device index
 * @f_ops: the file operations
 * @private_data: user pointer for f_ops->open()
 * @name: the device file name
 *
 * Registers an ALSA device file for the given card.
 * The operators have to be set in reg parameter.
 *
 * This function uses the card's device pointer to link to the
 * correct &struct device.
 *
 * Return: Zero if successful, or a negative error code on failure.
 */
static inline int snd_register_device(int type, struct snd_card *card, int dev,
                                      const struct file_operations *f_ops,
                                      void *private_data,
                                      const char *name)
{
        return snd_register_device_for_dev(type, card, dev, f_ops,
                                           private_data, name,
                                           snd_card_get_device_link(card));
}

int snd_unregister_device(int type, struct snd_card *card, int dev);
void *snd_lookup_minor_data(unsigned int minor, int type);
struct device *snd_get_device(int type, struct snd_card *card, int dev);

#ifdef CONFIG_SND_OSSEMUL
int snd_register_oss_device(int type, struct snd_card *card, int dev,
                            const struct file_operations *f_ops, void *private_data);
int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
void *snd_lookup_oss_minor_data(unsigned int minor, int type);
#endif

int snd_minor_info_init(void);
int snd_minor_info_done(void);

/* sound_oss.c */

#ifdef CONFIG_SND_OSSEMUL
int snd_minor_info_oss_init(void);
int snd_minor_info_oss_done(void);
#else
static inline int snd_minor_info_oss_init(void) { return 0; }
static inline int snd_minor_info_oss_done(void) { return 0; }
#endif

/* memory.c */

int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count);
int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count);

/* init.c */

extern struct snd_card *snd_cards[SNDRV_CARDS];
int snd_card_locked(int card);
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
#define SND_MIXER_OSS_NOTIFY_REGISTER   0
#define SND_MIXER_OSS_NOTIFY_DISCONNECT 1
#define SND_MIXER_OSS_NOTIFY_FREE       2
extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd);
#endif

int snd_card_new(struct device *parent, int idx, const char *xid,
                 struct module *module, int extra_size,
                 struct snd_card **card_ret);

int snd_card_disconnect(struct snd_card *card);
int snd_card_free(struct snd_card *card);
int snd_card_free_when_closed(struct snd_card *card);
void snd_card_set_id(struct snd_card *card, const char *id);
int snd_card_register(struct snd_card *card);
int snd_card_info_init(void);
int snd_card_info_done(void);
int snd_component_add(struct snd_card *card, const char *component);
int snd_card_file_add(struct snd_card *card, struct file *file);
int snd_card_file_remove(struct snd_card *card, struct file *file);
#define snd_card_unref(card)    put_device(&(card)->card_dev)

#define snd_card_set_dev(card, devptr) ((card)->dev = (devptr))

/* device.c */

int snd_device_new(struct snd_card *card, enum snd_device_type type,
                   void *device_data, struct snd_device_ops *ops);
int snd_device_register(struct snd_card *card, void *device_data);
int snd_device_register_all(struct snd_card *card);
int snd_device_disconnect_all(struct snd_card *card);
void snd_device_free(struct snd_card *card, void *device_data);
void snd_device_free_all(struct snd_card *card);

/* isadma.c */

#ifdef CONFIG_ISA_DMA_API
#define DMA_MODE_NO_ENABLE      0x0100

void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode);
void snd_dma_disable(unsigned long dma);
unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
#endif

/* misc.c */
struct resource;
void release_and_free_resource(struct resource *res);

/* --- */

/* sound printk debug levels */
enum {
        SND_PR_ALWAYS,
        SND_PR_DEBUG,
        SND_PR_VERBOSE,
};

#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
__printf(4, 5)
void __snd_printk(unsigned int level, const char *file, int line,
                  const char *format, ...);
#else
#define __snd_printk(level, file, line, format, args...) \
        printk(format, ##args)
#endif

/**
 * snd_printk - printk wrapper
 * @fmt: format string
 *
 * Works like printk() but prints the file and the line of the caller
 * when configured with CONFIG_SND_VERBOSE_PRINTK.
 */
#define snd_printk(fmt, args...) \
        __snd_printk(0, __FILE__, __LINE__, fmt, ##args)

#ifdef CONFIG_SND_DEBUG
/**
 * snd_printd - debug printk
 * @fmt: format string
 *
 * Works like snd_printk() for debugging purposes.
 * Ignored when CONFIG_SND_DEBUG is not set.
 */
#define snd_printd(fmt, args...) \
        __snd_printk(1, __FILE__, __LINE__, fmt, ##args)
#define _snd_printd(level, fmt, args...) \
        __snd_printk(level, __FILE__, __LINE__, fmt, ##args)

/**
 * snd_BUG - give a BUG warning message and stack trace
 *
 * Calls WARN() if CONFIG_SND_DEBUG is set.
 * Ignored when CONFIG_SND_DEBUG is not set.
 */
#define snd_BUG()               WARN(1, "BUG?\n")

/**
 * Suppress high rates of output when CONFIG_SND_DEBUG is enabled.
 */
#define snd_printd_ratelimit() printk_ratelimit()

/**
 * snd_BUG_ON - debugging check macro
 * @cond: condition to evaluate
 *
 * Has the same behavior as WARN_ON when CONFIG_SND_DEBUG is set,
 * otherwise just evaluates the conditional and returns the value.
 */
#define snd_BUG_ON(cond)        WARN_ON((cond))

#else /* !CONFIG_SND_DEBUG */

__printf(1, 2)
static inline void snd_printd(const char *format, ...) {}
__printf(2, 3)
static inline void _snd_printd(int level, const char *format, ...) {}

#define snd_BUG()                       do { } while (0)

#define snd_BUG_ON(condition) ({ \
        int __ret_warn_on = !!(condition); \
        unlikely(__ret_warn_on); \
})

static inline bool snd_printd_ratelimit(void) { return false; }

#endif /* CONFIG_SND_DEBUG */

#ifdef CONFIG_SND_DEBUG_VERBOSE
/**
 * snd_printdd - debug printk
 * @format: format string
 *
 * Works like snd_printk() for debugging purposes.
 * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set.
 */
#define snd_printdd(format, args...) \
        __snd_printk(2, __FILE__, __LINE__, format, ##args)
#else
__printf(1, 2)
static inline void snd_printdd(const char *format, ...) {}
#endif


#define SNDRV_OSS_VERSION         ((3<<16)|(8<<8)|(1<<4)|(0))   /* 3.8.1a */

/* for easier backward-porting */
#if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
#define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev))
#define gameport_set_port_data(gp,r) ((gp)->port_data = (r))
#define gameport_get_port_data(gp) (gp)->port_data
#endif

/* PCI quirk list helper */
struct snd_pci_quirk {
        unsigned short subvendor;       /* PCI subvendor ID */
        unsigned short subdevice;       /* PCI subdevice ID */
        unsigned short subdevice_mask;  /* bitmask to match */
        int value;                      /* value */
#ifdef CONFIG_SND_DEBUG_VERBOSE
        const char *name;               /* name of the device (optional) */
#endif
};

#define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \
        .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask)
#define _SND_PCI_QUIRK_ID(vend, dev) \
        _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev)
#define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)}
#ifdef CONFIG_SND_DEBUG_VERBOSE
#define SND_PCI_QUIRK(vend,dev,xname,val) \
        {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)}
#define SND_PCI_QUIRK_VENDOR(vend, xname, val)                  \
        {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)}
#define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val)                 \
        {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev),                       \
                        .value = (val), .name = (xname)}
#define snd_pci_quirk_name(q)   ((q)->name)
#else
#define SND_PCI_QUIRK(vend,dev,xname,val) \
        {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)}
#define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val)                 \
        {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)}
#define SND_PCI_QUIRK_VENDOR(vend, xname, val)                  \
        {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)}
#define snd_pci_quirk_name(q)   ""
#endif

#ifdef CONFIG_PCI
const struct snd_pci_quirk *
snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list);

const struct snd_pci_quirk *
snd_pci_quirk_lookup_id(u16 vendor, u16 device,
                        const struct snd_pci_quirk *list);
#else
static inline const struct snd_pci_quirk *
snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
{
        return NULL;
}

static inline const struct snd_pci_quirk *
snd_pci_quirk_lookup_id(u16 vendor, u16 device,
                        const struct snd_pci_quirk *list)
{
        return NULL;
}
#endif

#endif /* __SOUND_CORE_H */