This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / sound / aoa / aoa-gpio.h

diff --git a/sound/aoa/aoa-gpio.h b/sound/aoa/aoa-gpio.h
new file mode 100644 (file)
index 0000000..3a61f31
--- /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 */