Merge branch 'for-linus' of git://neil.brown.name/md
[platform/adaptation/renesas_rcar/renesas_kernel.git] / sound / firewire / cmp.h
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