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