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aoa.h

/*
 * Apple Onboard Audio definitions
 *
 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 *
 * GPL v2, can be found in COPYING.
 */

#ifndef __AOA_H
#define __AOA_H
#include <asm/prom.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/asound.h>
#include <sound/control.h>
#include "aoa-gpio.h"
#include "soundbus/soundbus.h"

#define MAX_CODEC_NAME_LEN    32

struct aoa_codec {
      char  name[MAX_CODEC_NAME_LEN];

      struct module *owner;

      /* called when the fabric wants to init this codec.
       * Do alsa card manipulations from here. */
      int (*init)(struct aoa_codec *codec);

      /* called when the fabric is done with the codec.
       * The alsa card will be cleaned up so don't bother. */
      void (*exit)(struct aoa_codec *codec);

      /* May be NULL, but can be used by the fabric.
       * Refcounting is the codec driver's responsibility */
      struct device_node *node;

      /* assigned by fabric before init() is called, points
       * to the soundbus device. Cannot be NULL. */
      struct soundbus_dev *soundbus_dev;

      /* assigned by the fabric before init() is called, points
       * to the fabric's gpio runtime record for the relevant
       * device. */
      struct gpio_runtime *gpio;

      /* assigned by the fabric before init() is called, contains
       * a codec specific bitmask of what outputs and inputs are
       * actually connected */
      u32 connected;

      /* data the fabric can associate with this structure */
      void *fabric_data;

      /* private! */
      struct list_head list;
      struct aoa_fabric *fabric;
};

/* return 0 on success */
extern int
aoa_codec_register(struct aoa_codec *codec);
extern void
aoa_codec_unregister(struct aoa_codec *codec);

#define MAX_LAYOUT_NAME_LEN   32

struct aoa_fabric {
      char  name[MAX_LAYOUT_NAME_LEN];

      struct module *owner;

      /* once codecs register, they are passed here after.
       * They are of course not initialised, since the
       * fabric is responsible for initialising some fields
       * in the codec structure! */
      int (*found_codec)(struct aoa_codec *codec);
      /* called for each codec when it is removed,
       * also in the case that aoa_fabric_unregister
       * is called and all codecs are removed
       * from this fabric.
       * Also called if found_codec returned 0 but
       * the codec couldn't initialise. */
      void (*remove_codec)(struct aoa_codec *codec);
      /* If found_codec returned 0, and the codec
       * could be initialised, this is called. */
      void (*attached_codec)(struct aoa_codec *codec);
};

/* return 0 on success, -EEXIST if another fabric is
 * registered, -EALREADY if the same fabric is registered.
 * Passing NULL can be used to test for the presence
 * of another fabric, if -EALREADY is returned there is
 * no other fabric present.
 * In the case that the function returns -EALREADY
 * and the fabric passed is not NULL, all codecs
 * that are not assigned yet are passed to the fabric
 * again for reconsideration. */
extern int
aoa_fabric_register(struct aoa_fabric *fabric, struct device *dev);

/* it is vital to call this when the fabric exits!
 * When calling, the remove_codec will be called
 * for all codecs, unless it is NULL. */
extern void
aoa_fabric_unregister(struct aoa_fabric *fabric);

/* if for some reason you want to get rid of a codec
 * before the fabric is removed, use this.
 * Note that remove_codec is called for it! */
extern void
aoa_fabric_unlink_codec(struct aoa_codec *codec);

/* alsa help methods */
struct aoa_card {
      struct snd_card *alsa_card;
};
        
extern int aoa_snd_device_new(snd_device_type_t type,
      void * device_data, struct snd_device_ops * ops);
extern struct snd_card *aoa_get_card(void);
extern int aoa_snd_ctl_add(struct snd_kcontrol* control);

/* GPIO stuff */
extern struct gpio_methods *pmf_gpio_methods;
extern struct gpio_methods *ftr_gpio_methods;
/* extern struct gpio_methods *map_gpio_methods; */

#endif /* __AOA_H */

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