mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 04:11:49 +00:00
31ef9134eb
Add a driver for two playback-only FireWire devices based on the OXFW970
chip.
v2: better AMDTP API abstraction; fix fw_unit leak; small fixes
v3: cache the iPCR value
v4: FireWave constraints; fix fw_device reference counting;
fix PCR caching; small changes and fixes
v5: volume/mute support; fix crashing due to pcm stop races
v6: fix build; one-channel volume for LaCie
v7: use signed values to make volume (range checks) work; fix function
block IDs for volume/mute; always use channel 0 for LaCie volume
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Tested-by: Jay Fenlason <fenlason@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
#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 from the local
|
|
* computer to a device's input plug (iPCR).
|
|
*
|
|
* 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 ipcr_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
|