[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, 81 insertions, 0 deletions

diff --git a/sound/aoa/aoa-gpio.h b/sound/aoa/aoa-gpio.h
new file mode 100644
index 000000000000..3a61f3115573
--- /dev/null
+++ b/sound/aoa/aoa-gpio.h
@@ -0,0 +1,81 @@
+/*
+ * Apple Onboard Audio GPIO definitions
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+
+#ifndef __AOA_GPIO_H
+#define __AOA_GPIO_H
+#include <linux/workqueue.h>
+#include <linux/mutex.h>
+#include <asm/prom.h>
+
+typedef void (*notify_func_t)(void *data);
+
+enum notify_type {
+        AOA_NOTIFY_HEADPHONE,
+        AOA_NOTIFY_LINE_IN,
+        AOA_NOTIFY_LINE_OUT,
+};
+
+struct gpio_runtime;
+struct gpio_methods {
+        /* for initialisation/de-initialisation of the GPIO layer */
+        void (*init)(struct gpio_runtime *rt);
+        void (*exit)(struct gpio_runtime *rt);
+
+        /* turn off headphone, speakers, lineout */
+        void (*all_amps_off)(struct gpio_runtime *rt);
+        /* turn headphone, speakers, lineout back to previous setting */
+        void (*all_amps_restore)(struct gpio_runtime *rt);
+
+        void (*set_headphone)(struct gpio_runtime *rt, int on);
+        void (*set_speakers)(struct gpio_runtime *rt, int on);
+        void (*set_lineout)(struct gpio_runtime *rt, int on);
+
+        int (*get_headphone)(struct gpio_runtime *rt);
+        int (*get_speakers)(struct gpio_runtime *rt);
+        int (*get_lineout)(struct gpio_runtime *rt);
+
+        void (*set_hw_reset)(struct gpio_runtime *rt, int on);
+
+        /* use this to be notified of any events. The notification
+         * function is passed the data, and is called in process
+         * context by the use of schedule_work.
+         * The interface for it is that setting a function to NULL
+         * removes it, and they return 0 if the operation succeeded,
+         * and -EBUSY if the notification is already assigned by
+         * someone else. */
+        int (*set_notify)(struct gpio_runtime *rt,
+                          enum notify_type type,
+                          notify_func_t notify,
+                          void *data);
+        /* returns 0 if not plugged in, 1 if plugged in
+         * or a negative error code */
+        int (*get_detect)(struct gpio_runtime *rt,
+                          enum notify_type type);
+};
+
+struct gpio_notification {
+        notify_func_t notify;
+        void *data;
+        void *gpio_private;
+        struct work_struct work;
+        struct mutex mutex;
+};
+
+struct gpio_runtime {
+        /* to be assigned by fabric */
+        struct device_node *node;
+        /* since everyone needs this pointer anyway... */
+        struct gpio_methods *methods;
+        /* to be used by the gpio implementation */
+        int implementation_private;
+        struct gpio_notification headphone_notify;
+        struct gpio_notification line_in_notify;
+        struct gpio_notification line_out_notify;
+};
+
+#endif /* __AOA_GPIO_H */