9a02843cae
This commit adds support for AMDTP in-stream. As a result, Dice driver supports full duplex streams with synchronization. AMDTP can transfer timestamps in its packets. By handling the timestamp, devices can synchronize to the other devices or drivers on the same bus. When Dice chipset is 'enabled', it starts streams with correct settings. This 'enable' register is global, thus, when a stream is started to run, an opposite stream can't start unless turning off 'enable'. Therefore a pair of streams must be running. This causes a loss of CPU usage when single stream is needed for neither playbacking or capturing. This commit assumes that playback-only models also have a functionality to transmit stream for delivering timestamps. Currently, sampling clock source is restricted to SYT-Match mode. This is improved in followed commit. I note that at SYT-Match mode, Dice can select from 4 streams for synchronization but this driver uses the 1st stream only for simplicity. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
189 lines
5.5 KiB
C
189 lines
5.5 KiB
C
/*
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* dice.h - a part of driver for Dice based devices
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*
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* Copyright (c) Clemens Ladisch
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* Copyright (c) 2014 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#ifndef SOUND_DICE_H_INCLUDED
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#define SOUND_DICE_H_INCLUDED
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#include <linux/compat.h>
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/firewire.h>
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#include <linux/firewire-constants.h>
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#include <linux/jiffies.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/wait.h>
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#include <sound/control.h>
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#include <sound/core.h>
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#include <sound/firewire.h>
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#include <sound/hwdep.h>
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#include <sound/info.h>
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#include <sound/initval.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "../amdtp.h"
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#include "../iso-resources.h"
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#include "../lib.h"
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#include "dice-interface.h"
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struct snd_dice {
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struct snd_card *card;
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struct fw_unit *unit;
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spinlock_t lock;
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struct mutex mutex;
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/* Offsets for sub-addresses */
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unsigned int global_offset;
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unsigned int rx_offset;
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unsigned int tx_offset;
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unsigned int sync_offset;
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unsigned int rsrv_offset;
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unsigned int clock_caps;
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unsigned int tx_channels[3];
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unsigned int rx_channels[3];
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unsigned int tx_midi_ports[3];
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unsigned int rx_midi_ports[3];
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struct fw_address_handler notification_handler;
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int owner_generation;
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u32 notification_bits;
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/* For uapi */
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int dev_lock_count; /* > 0 driver, < 0 userspace */
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bool dev_lock_changed;
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wait_queue_head_t hwdep_wait;
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/* For streaming */
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struct fw_iso_resources tx_resources;
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struct fw_iso_resources rx_resources;
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struct amdtp_stream tx_stream;
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struct amdtp_stream rx_stream;
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bool global_enabled;
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struct completion clock_accepted;
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unsigned int substreams_counter;
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};
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enum snd_dice_addr_type {
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SND_DICE_ADDR_TYPE_PRIVATE,
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SND_DICE_ADDR_TYPE_GLOBAL,
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SND_DICE_ADDR_TYPE_TX,
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SND_DICE_ADDR_TYPE_RX,
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SND_DICE_ADDR_TYPE_SYNC,
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SND_DICE_ADDR_TYPE_RSRV,
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};
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int snd_dice_transaction_write(struct snd_dice *dice,
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enum snd_dice_addr_type type,
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unsigned int offset,
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void *buf, unsigned int len);
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int snd_dice_transaction_read(struct snd_dice *dice,
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enum snd_dice_addr_type type, unsigned int offset,
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void *buf, unsigned int len);
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static inline int snd_dice_transaction_write_global(struct snd_dice *dice,
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unsigned int offset,
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void *buf, unsigned int len)
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{
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return snd_dice_transaction_write(dice,
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SND_DICE_ADDR_TYPE_GLOBAL, offset,
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buf, len);
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}
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static inline int snd_dice_transaction_read_global(struct snd_dice *dice,
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unsigned int offset,
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void *buf, unsigned int len)
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{
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return snd_dice_transaction_read(dice,
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SND_DICE_ADDR_TYPE_GLOBAL, offset,
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buf, len);
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}
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static inline int snd_dice_transaction_write_tx(struct snd_dice *dice,
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unsigned int offset,
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void *buf, unsigned int len)
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{
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return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_TX, offset,
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buf, len);
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}
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static inline int snd_dice_transaction_read_tx(struct snd_dice *dice,
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unsigned int offset,
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void *buf, unsigned int len)
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{
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return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_TX, offset,
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buf, len);
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}
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static inline int snd_dice_transaction_write_rx(struct snd_dice *dice,
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unsigned int offset,
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void *buf, unsigned int len)
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{
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return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_RX, offset,
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buf, len);
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}
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static inline int snd_dice_transaction_read_rx(struct snd_dice *dice,
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unsigned int offset,
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void *buf, unsigned int len)
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{
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return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_RX, offset,
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buf, len);
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}
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static inline int snd_dice_transaction_write_sync(struct snd_dice *dice,
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unsigned int offset,
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void *buf, unsigned int len)
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{
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return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_SYNC, offset,
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buf, len);
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}
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static inline int snd_dice_transaction_read_sync(struct snd_dice *dice,
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unsigned int offset,
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void *buf, unsigned int len)
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{
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return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_SYNC, offset,
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buf, len);
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}
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int snd_dice_transaction_set_clock_source(struct snd_dice *dice,
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unsigned int source);
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int snd_dice_transaction_get_clock_source(struct snd_dice *dice,
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unsigned int *source);
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int snd_dice_transaction_set_rate(struct snd_dice *dice, unsigned int rate);
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int snd_dice_transaction_get_rate(struct snd_dice *dice, unsigned int *rate);
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int snd_dice_transaction_set_enable(struct snd_dice *dice);
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void snd_dice_transaction_clear_enable(struct snd_dice *dice);
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int snd_dice_transaction_init(struct snd_dice *dice);
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int snd_dice_transaction_reinit(struct snd_dice *dice);
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void snd_dice_transaction_destroy(struct snd_dice *dice);
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#define SND_DICE_RATES_COUNT 7
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extern const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT];
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int snd_dice_stream_get_rate_mode(struct snd_dice *dice,
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unsigned int rate, unsigned int *mode);
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int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate);
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void snd_dice_stream_stop_duplex(struct snd_dice *dice);
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int snd_dice_stream_init_duplex(struct snd_dice *dice);
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void snd_dice_stream_destroy_duplex(struct snd_dice *dice);
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void snd_dice_stream_update_duplex(struct snd_dice *dice);
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int snd_dice_stream_lock_try(struct snd_dice *dice);
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void snd_dice_stream_lock_release(struct snd_dice *dice);
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int snd_dice_create_pcm(struct snd_dice *dice);
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int snd_dice_create_hwdep(struct snd_dice *dice);
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void snd_dice_create_proc(struct snd_dice *dice);
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#endif
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