mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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
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#define SOUND_FIREWIRE_CMP_H_INCLUDED
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#include <linux/mutex.h>
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#include <linux/types.h>
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#include "iso-resources.h"
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struct fw_unit;
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/**
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* struct cmp_connection - manages an isochronous connection to a device
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* @speed: the connection's actual speed
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*
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* This structure manages (using CMP) an isochronous stream from the local
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* computer to a device's input plug (iPCR).
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*
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* There is no corresponding oPCR created on the local computer, so it is not
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* possible to overlay connections on top of this one.
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*/
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struct cmp_connection {
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int speed;
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/* private: */
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bool connected;
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struct mutex mutex;
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struct fw_iso_resources resources;
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__be32 last_pcr_value;
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unsigned int pcr_index;
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unsigned int max_speed;
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};
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int cmp_connection_init(struct cmp_connection *connection,
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struct fw_unit *unit,
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unsigned int ipcr_index);
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void cmp_connection_destroy(struct cmp_connection *connection);
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int cmp_connection_establish(struct cmp_connection *connection,
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unsigned int max_payload);
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int cmp_connection_update(struct cmp_connection *connection);
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void cmp_connection_break(struct cmp_connection *connection);
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#endif
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