linux-stable/sound/firewire/packets-buffer.h
Clemens Ladisch 31ef9134eb ALSA: add LaCie FireWire Speakers/Griffin FireWave Surround driver
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>
2011-03-15 08:42:22 +01:00

26 lines
747 B
C

#ifndef SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
#define SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
#include <linux/dma-mapping.h>
#include <linux/firewire.h>
/**
* struct iso_packets_buffer - manages a buffer for many packets
* @iso_buffer: the memory containing the packets
* @packets: an array, with each element pointing to one packet
*/
struct iso_packets_buffer {
struct fw_iso_buffer iso_buffer;
struct {
void *buffer;
unsigned int offset;
} *packets;
};
int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit,
unsigned int count, unsigned int packet_size,
enum dma_data_direction direction);
void iso_packets_buffer_destroy(struct iso_packets_buffer *b,
struct fw_unit *unit);
#endif