linux/sound/aoa/aoa.h
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   1/*
   2 * Apple Onboard Audio definitions
   3 *
   4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
   5 *
   6 * GPL v2, can be found in COPYING.
   7 */
   8
   9#ifndef __AOA_H
  10#define __AOA_H
  11#include <asm/prom.h>
  12#include <linux/module.h>
  13#include <sound/core.h>
  14#include <sound/asound.h>
  15#include <sound/control.h>
  16#include "aoa-gpio.h"
  17#include "soundbus/soundbus.h"
  18
  19#define MAX_CODEC_NAME_LEN      32
  20
  21struct aoa_codec {
  22        char    name[MAX_CODEC_NAME_LEN];
  23
  24        struct module *owner;
  25
  26        /* called when the fabric wants to init this codec.
  27         * Do alsa card manipulations from here. */
  28        int (*init)(struct aoa_codec *codec);
  29
  30        /* called when the fabric is done with the codec.
  31         * The alsa card will be cleaned up so don't bother. */
  32        void (*exit)(struct aoa_codec *codec);
  33
  34        /* May be NULL, but can be used by the fabric.
  35         * Refcounting is the codec driver's responsibility */
  36        struct device_node *node;
  37
  38        /* assigned by fabric before init() is called, points
  39         * to the soundbus device. Cannot be NULL. */
  40        struct soundbus_dev *soundbus_dev;
  41
  42        /* assigned by the fabric before init() is called, points
  43         * to the fabric's gpio runtime record for the relevant
  44         * device. */
  45        struct gpio_runtime *gpio;
  46
  47        /* assigned by the fabric before init() is called, contains
  48         * a codec specific bitmask of what outputs and inputs are
  49         * actually connected */
  50        u32 connected;
  51
  52        /* data the fabric can associate with this structure */
  53        void *fabric_data;
  54
  55        /* private! */
  56        struct list_head list;
  57        struct aoa_fabric *fabric;
  58};
  59
  60/* return 0 on success */
  61extern int
  62aoa_codec_register(struct aoa_codec *codec);
  63extern void
  64aoa_codec_unregister(struct aoa_codec *codec);
  65
  66#define MAX_LAYOUT_NAME_LEN     32
  67
  68struct aoa_fabric {
  69        char    name[MAX_LAYOUT_NAME_LEN];
  70
  71        struct module *owner;
  72
  73        /* once codecs register, they are passed here after.
  74         * They are of course not initialised, since the
  75         * fabric is responsible for initialising some fields
  76         * in the codec structure! */
  77        int (*found_codec)(struct aoa_codec *codec);
  78        /* called for each codec when it is removed,
  79         * also in the case that aoa_fabric_unregister
  80         * is called and all codecs are removed
  81         * from this fabric.
  82         * Also called if found_codec returned 0 but
  83         * the codec couldn't initialise. */
  84        void (*remove_codec)(struct aoa_codec *codec);
  85        /* If found_codec returned 0, and the codec
  86         * could be initialised, this is called. */
  87        void (*attached_codec)(struct aoa_codec *codec);
  88};
  89
  90/* return 0 on success, -EEXIST if another fabric is
  91 * registered, -EALREADY if the same fabric is registered.
  92 * Passing NULL can be used to test for the presence
  93 * of another fabric, if -EALREADY is returned there is
  94 * no other fabric present.
  95 * In the case that the function returns -EALREADY
  96 * and the fabric passed is not NULL, all codecs
  97 * that are not assigned yet are passed to the fabric
  98 * again for reconsideration. */
  99extern int
 100aoa_fabric_register(struct aoa_fabric *fabric, struct device *dev);
 101
 102/* it is vital to call this when the fabric exits!
 103 * When calling, the remove_codec will be called
 104 * for all codecs, unless it is NULL. */
 105extern void
 106aoa_fabric_unregister(struct aoa_fabric *fabric);
 107
 108/* if for some reason you want to get rid of a codec
 109 * before the fabric is removed, use this.
 110 * Note that remove_codec is called for it! */
 111extern void
 112aoa_fabric_unlink_codec(struct aoa_codec *codec);
 113
 114/* alsa help methods */
 115struct aoa_card {
 116        struct snd_card *alsa_card;
 117};
 118        
 119extern int aoa_snd_device_new(snd_device_type_t type,
 120        void * device_data, struct snd_device_ops * ops);
 121extern struct snd_card *aoa_get_card(void);
 122extern int aoa_snd_ctl_add(struct snd_kcontrol* control);
 123
 124/* GPIO stuff */
 125extern struct gpio_methods *pmf_gpio_methods;
 126extern struct gpio_methods *ftr_gpio_methods;
 127/* extern struct gpio_methods *map_gpio_methods; */
 128
 129#endif /* __AOA_H */
 130
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