mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 08:26:29 +00:00
5f17e79cdf
Some machines have a master amp GPIO that needs to be toggled to get sound output, in addition to speaker/headphone/line-out amps. This makes snd-aoa handle it, if present in the device tree, thus making snd-aoa be able to output sound on PowerMac3,6, which was previously handled by snd-powermac which also doesn't use the master amp GPIO. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*
|
|
* 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);
|
|
void (*set_master)(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);
|
|
int (*get_master)(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 {
|
|
struct delayed_work work;
|
|
notify_func_t notify;
|
|
void *data;
|
|
void *gpio_private;
|
|
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 */
|