[linux.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;

/**
 * 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;
};

int cmp_connection_init(struct cmp_connection *connection,
			struct fw_unit *unit,
			unsigned int pcr_index);
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
	10	/**
	11	* struct cmp_connection - manages an isochronous connection to a device
	12	* @speed: the connection's actual speed
	13	*
a7fa0d04 TS	14	* This structure manages (using CMP) an isochronous stream between the local
a7fa0d04 TS	15	* computer and a device's input plug (iPCR) and output plug (oPCR).
31ef9134 CL	16	*
	17	* There is no corresponding oPCR created on the local computer, so it is not
	18	* possible to overlay connections on top of this one.
	19	*/
	20	struct cmp_connection {
	21	int speed;
	22	/* private: */
	23	bool connected;
	24	struct mutex mutex;
	25	struct fw_iso_resources resources;
	26	__be32 last_pcr_value;
	27	unsigned int pcr_index;
	28	unsigned int max_speed;
	29	};
	30
	31	int cmp_connection_init(struct cmp_connection *connection,
	32	struct fw_unit *unit,
a7fa0d04	33	unsigned int pcr_index);
31ef9134 CL	34	void cmp_connection_destroy(struct cmp_connection *connection);
	35
	36	int cmp_connection_establish(struct cmp_connection *connection,
	37	unsigned int max_payload);
	38	int cmp_connection_update(struct cmp_connection *connection);
	39	void cmp_connection_break(struct cmp_connection *connection);
	40
	41	#endif