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xianfeng |
/*
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* Apple Onboard Audio definitions
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*
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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*
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* GPL v2, can be found in COPYING.
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*/
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#ifndef __AOA_H
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#define __AOA_H
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#include <asm/prom.h>
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#include <linux/module.h>
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/* So apparently there's a reason for requiring driver.h to be included first! */
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#include <sound/driver.h>
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#include <sound/core.h>
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#include <sound/asound.h>
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#include <sound/control.h>
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#include "aoa-gpio.h"
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#include "soundbus/soundbus.h"
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#define MAX_CODEC_NAME_LEN 32
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struct aoa_codec {
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char name[MAX_CODEC_NAME_LEN];
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struct module *owner;
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/* called when the fabric wants to init this codec.
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* Do alsa card manipulations from here. */
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int (*init)(struct aoa_codec *codec);
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/* called when the fabric is done with the codec.
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* The alsa card will be cleaned up so don't bother. */
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void (*exit)(struct aoa_codec *codec);
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/* May be NULL, but can be used by the fabric.
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* Refcounting is the codec driver's responsibility */
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struct device_node *node;
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/* assigned by fabric before init() is called, points
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* to the soundbus device. Cannot be NULL. */
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struct soundbus_dev *soundbus_dev;
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/* assigned by the fabric before init() is called, points
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* to the fabric's gpio runtime record for the relevant
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* device. */
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struct gpio_runtime *gpio;
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/* assigned by the fabric before init() is called, contains
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* a codec specific bitmask of what outputs and inputs are
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* actually connected */
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u32 connected;
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/* data the fabric can associate with this structure */
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void *fabric_data;
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/* private! */
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struct list_head list;
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struct aoa_fabric *fabric;
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};
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/* return 0 on success */
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extern int
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aoa_codec_register(struct aoa_codec *codec);
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extern void
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aoa_codec_unregister(struct aoa_codec *codec);
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#define MAX_LAYOUT_NAME_LEN 32
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struct aoa_fabric {
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char name[MAX_LAYOUT_NAME_LEN];
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struct module *owner;
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/* once codecs register, they are passed here after.
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* They are of course not initialised, since the
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* fabric is responsible for initialising some fields
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* in the codec structure! */
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int (*found_codec)(struct aoa_codec *codec);
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/* called for each codec when it is removed,
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* also in the case that aoa_fabric_unregister
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* is called and all codecs are removed
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* from this fabric.
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* Also called if found_codec returned 0 but
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* the codec couldn't initialise. */
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void (*remove_codec)(struct aoa_codec *codec);
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/* If found_codec returned 0, and the codec
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* could be initialised, this is called. */
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void (*attached_codec)(struct aoa_codec *codec);
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};
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/* return 0 on success, -EEXIST if another fabric is
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* registered, -EALREADY if the same fabric is registered.
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* Passing NULL can be used to test for the presence
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* of another fabric, if -EALREADY is returned there is
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* no other fabric present.
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* In the case that the function returns -EALREADY
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* and the fabric passed is not NULL, all codecs
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* that are not assigned yet are passed to the fabric
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* again for reconsideration. */
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extern int
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aoa_fabric_register(struct aoa_fabric *fabric, struct device *dev);
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/* it is vital to call this when the fabric exits!
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* When calling, the remove_codec will be called
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* for all codecs, unless it is NULL. */
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extern void
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aoa_fabric_unregister(struct aoa_fabric *fabric);
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/* if for some reason you want to get rid of a codec
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* before the fabric is removed, use this.
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* Note that remove_codec is called for it! */
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extern void
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aoa_fabric_unlink_codec(struct aoa_codec *codec);
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/* alsa help methods */
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struct aoa_card {
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struct snd_card *alsa_card;
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};
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extern int aoa_snd_device_new(snd_device_type_t type,
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void * device_data, struct snd_device_ops * ops);
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extern struct snd_card *aoa_get_card(void);
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extern int aoa_snd_ctl_add(struct snd_kcontrol* control);
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/* GPIO stuff */
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extern struct gpio_methods *pmf_gpio_methods;
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extern struct gpio_methods *ftr_gpio_methods;
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/* extern struct gpio_methods *map_gpio_methods; */
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#endif /* __AOA_H */
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