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Diffstat (limited to '')
| -rw-r--r-- | sound/aoa/aoa.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/sound/aoa/aoa.h b/sound/aoa/aoa.h new file mode 100644 index 0000000000..3d2d03ff63 --- /dev/null +++ b/sound/aoa/aoa.h @@ -0,0 +1,128 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Apple Onboard Audio definitions + * + * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> + */ + +#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(enum snd_device_type type, + void *device_data, const 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 */ |