[ALSA] snd-aoa: add snd-aoa

This large patch adds all of snd-aoa.
Consisting of many modules, it currently replaces snd-powermac
for all layout-id based machines and handles many more (for
example new powerbooks and powermacs with digital output that
previously couldn't be used at all).
It also has support for all layout-IDs that Apple has (judging
from their Info.plist file) but not all are tested.
The driver currently has 2 known regressions over snd-powermac:
 * it doesn't handle powermac 7,2 and 7,3
 * it doesn't have a DRC control on snapper-based machines
I will fix those during the 2.6.18 development cycle.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 131 insertions, 0 deletions

diff --git a/sound/aoa/aoa.h b/sound/aoa/aoa.h
new file mode 100644
index 000000000000..378ef1e9879b
--- /dev/null
+++ b/sound/aoa/aoa.h
@@ -0,0 +1,131 @@
+/*
+ * 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>
+/* So apparently there's a reason for requiring driver.h to be included first! */
+#include <sound/driver.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);
+
+/* 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 */