[mirror_ubuntu-artful-kernel.git] / sound / firewire / cmp.h

#ifndef SOUND_FIREWIRE_CMP_H_INCLUDED
#define SOUND_FIREWIRE_CMP_H_INCLUDED

#include <linux/mutex.h>
#include <linux/types.h>
#include "iso-resources.h"

struct fw_unit;

enum cmp_direction {
	CMP_INPUT = 0,
	CMP_OUTPUT,
};

/**
 * struct cmp_connection - manages an isochronous connection to a device
 * @speed: the connection's actual speed
 *
 * This structure manages (using CMP) an isochronous stream between the local
 * computer and a device's input plug (iPCR) and output plug (oPCR).
 *
 * There is no corresponding oPCR created on the local computer, so it is not
 * possible to overlay connections on top of this one.
 */
struct cmp_connection {
	int speed;
	/* private: */
	bool connected;
	struct mutex mutex;
	struct fw_iso_resources resources;
	__be32 last_pcr_value;
	unsigned int pcr_index;
	unsigned int max_speed;
	enum cmp_direction direction;
};

int cmp_connection_init(struct cmp_connection *connection,
			struct fw_unit *unit,
			enum cmp_direction direction,
			unsigned int pcr_index);
int cmp_connection_check_used(struct cmp_connection *connection, bool *used);
void cmp_connection_destroy(struct cmp_connection *connection);

int cmp_connection_establish(struct cmp_connection *connection,
			     unsigned int max_payload);
int cmp_connection_update(struct cmp_connection *connection);
void cmp_connection_break(struct cmp_connection *connection);

#endif
Commit	Line	Data
31ef9134 CL	1	#ifndef SOUND_FIREWIRE_CMP_H_INCLUDED
	2	#define SOUND_FIREWIRE_CMP_H_INCLUDED
	3
	4	#include <linux/mutex.h>
	5	#include <linux/types.h>
	6	#include "iso-resources.h"
	7
	8	struct fw_unit;
	9
c68a1c65 TS	10	enum cmp_direction {
	11	CMP_INPUT = 0,
	12	CMP_OUTPUT,
	13	};
	14
31ef9134 CL	15	/**
	16	* struct cmp_connection - manages an isochronous connection to a device
	17	* @speed: the connection's actual speed
	18	*
a7fa0d04 TS	19	* This structure manages (using CMP) an isochronous stream between the local
a7fa0d04 TS	20	* computer and a device's input plug (iPCR) and output plug (oPCR).
31ef9134 CL	21	*
	22	* There is no corresponding oPCR created on the local computer, so it is not
	23	* possible to overlay connections on top of this one.
	24	*/
	25	struct cmp_connection {
	26	int speed;
	27	/* private: */
	28	bool connected;
	29	struct mutex mutex;
	30	struct fw_iso_resources resources;
	31	__be32 last_pcr_value;
	32	unsigned int pcr_index;
	33	unsigned int max_speed;
c68a1c65	34	enum cmp_direction direction;
31ef9134 CL	35	};
	36
	37	int cmp_connection_init(struct cmp_connection *connection,
	38	struct fw_unit *unit,
c68a1c65	39	enum cmp_direction direction,
a7fa0d04	40	unsigned int pcr_index);
b04479fb	41	int cmp_connection_check_used(struct cmp_connection connection, bool used);
31ef9134 CL	42	void cmp_connection_destroy(struct cmp_connection *connection);
	43
	44	int cmp_connection_establish(struct cmp_connection *connection,
	45	unsigned int max_payload);
	46	int cmp_connection_update(struct cmp_connection *connection);
	47	void cmp_connection_break(struct cmp_connection *connection);
	48
	49	#endif