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 * 14 * This structure manages (using CMP) an isochronous stream from the local 15 * computer to a device's input plug (iPCR). 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, 33 unsigned int ipcr_index); 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 42