[linux-2.6-block.git] / sound / firewire / amdtp.h

#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED
#define SOUND_FIREWIRE_AMDTP_H_INCLUDED

#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <sound/asound.h>
#include "packets-buffer.h"

/**
 * enum cip_flags - describes details of the streaming protocol
 * @CIP_NONBLOCKING: In non-blocking mode, each packet contains
 *	sample_rate/8000 samples, with rounding up or down to adjust
 *	for clock skew and left-over fractional samples.  This should
 *	be used if supported by the device.
 * @CIP_BLOCKING: In blocking mode, each packet contains either zero or
 *	SYT_INTERVAL samples, with these two types alternating so that
 *	the overall sample rate comes out right.
 * @CIP_SYNC_TO_DEVICE: In sync to device mode, time stamp in out packets is
 *	generated by in packets. Defaultly this driver generates timestamp.
 * @CIP_EMPTY_WITH_TAG0: Only for in-stream. Empty in-packets have TAG0.
 * @CIP_DBC_IS_END_EVENT: Only for in-stream. The value of dbc in an in-packet
 *	corresponds to the end of event in the packet. Out of IEC 61883.
 * @CIP_WRONG_DBS: Only for in-stream. The value of dbs is wrong in in-packets.
 *	The value of data_block_quadlets is used instead of reported value.
 * @CIP_SKIP_DBC_ZERO_CHECK: Only for in-stream.  Packets with zero in dbc is
 *	skipped for detecting discontinuity.
 * @CIP_SKIP_INIT_DBC_CHECK: Only for in-stream. The value of dbc in first
 *	packet is not continuous from an initial value.
 * @CIP_EMPTY_HAS_WRONG_DBC: Only for in-stream. The value of dbc in empty
 *	packet is wrong but the others are correct.
 */
enum cip_flags {
	CIP_NONBLOCKING		= 0x00,
	CIP_BLOCKING		= 0x01,
	CIP_SYNC_TO_DEVICE	= 0x02,
	CIP_EMPTY_WITH_TAG0	= 0x04,
	CIP_DBC_IS_END_EVENT	= 0x08,
	CIP_WRONG_DBS		= 0x10,
	CIP_SKIP_DBC_ZERO_CHECK	= 0x20,
	CIP_SKIP_INIT_DBC_CHECK	= 0x40,
	CIP_EMPTY_HAS_WRONG_DBC	= 0x80,
};

/**
 * enum cip_sfc - supported Sampling Frequency Codes (SFCs)
 * @CIP_SFC_32000:   32,000 data blocks
 * @CIP_SFC_44100:   44,100 data blocks
 * @CIP_SFC_48000:   48,000 data blocks
 * @CIP_SFC_88200:   88,200 data blocks
 * @CIP_SFC_96000:   96,000 data blocks
 * @CIP_SFC_176400: 176,400 data blocks
 * @CIP_SFC_192000: 192,000 data blocks
 * @CIP_SFC_COUNT: the number of supported SFCs
 *
 * These values are used to show nominal Sampling Frequency Code in
 * Format Dependent Field (FDF) of AMDTP packet header. In IEC 61883-6:2002,
 * this code means the number of events per second. Actually the code
 * represents the number of data blocks transferred per second in an AMDTP
 * stream.
 *
 * In IEC 61883-6:2005, some extensions were added to support more types of
 * data such as 'One Bit LInear Audio', therefore the meaning of SFC became
 * different depending on the types.
 *
 * Currently our implementation is compatible with IEC 61883-6:2002.
 */
enum cip_sfc {
	CIP_SFC_32000  = 0,
	CIP_SFC_44100  = 1,
	CIP_SFC_48000  = 2,
	CIP_SFC_88200  = 3,
	CIP_SFC_96000  = 4,
	CIP_SFC_176400 = 5,
	CIP_SFC_192000 = 6,
	CIP_SFC_COUNT
};

#define AMDTP_IN_PCM_FORMAT_BITS	SNDRV_PCM_FMTBIT_S32

#define AMDTP_OUT_PCM_FORMAT_BITS	(SNDRV_PCM_FMTBIT_S16 | \
					 SNDRV_PCM_FMTBIT_S32)


/*
 * This module supports maximum 64 PCM channels for one PCM stream
 * This is for our convenience.
 */
#define AMDTP_MAX_CHANNELS_FOR_PCM	64

/*
 * AMDTP packet can include channels for MIDI conformant data.
 * Each MIDI conformant data channel includes 8 MPX-MIDI data stream.
 * Each MPX-MIDI data stream includes one data stream from/to MIDI ports.
 *
 * This module supports maximum 1 MIDI conformant data channels.
 * Then this AMDTP packets can transfer maximum 8 MIDI data streams.
 */
#define AMDTP_MAX_CHANNELS_FOR_MIDI	1

struct fw_unit;
struct fw_iso_context;
struct snd_pcm_substream;
struct snd_pcm_runtime;
struct snd_rawmidi_substream;

enum amdtp_stream_direction {
	AMDTP_OUT_STREAM = 0,
	AMDTP_IN_STREAM
};

struct amdtp_stream {
	struct fw_unit *unit;
	enum cip_flags flags;
	enum amdtp_stream_direction direction;
	struct fw_iso_context *context;
	struct mutex mutex;

	enum cip_sfc sfc;
	unsigned int data_block_quadlets;
	unsigned int pcm_channels;
	unsigned int midi_ports;
	void (*transfer_samples)(struct amdtp_stream *s,
				 struct snd_pcm_substream *pcm,
				 __be32 *buffer, unsigned int frames);
	u8 pcm_positions[AMDTP_MAX_CHANNELS_FOR_PCM];
	u8 midi_position;

	unsigned int syt_interval;
	unsigned int transfer_delay;
	unsigned int source_node_id_field;
	struct iso_packets_buffer buffer;

	struct snd_pcm_substream *pcm;
	struct tasklet_struct period_tasklet;

	int packet_index;
	unsigned int data_block_counter;

	unsigned int data_block_state;

	unsigned int last_syt_offset;
	unsigned int syt_offset_state;

	unsigned int pcm_buffer_pointer;
	unsigned int pcm_period_pointer;
	bool pointer_flush;
	bool double_pcm_frames;

	struct snd_rawmidi_substream *midi[AMDTP_MAX_CHANNELS_FOR_MIDI * 8];
	int midi_fifo_limit;
	int midi_fifo_used[AMDTP_MAX_CHANNELS_FOR_MIDI * 8];

	/* quirk: fixed interval of dbc between previos/current packets. */
	unsigned int tx_dbc_interval;

	bool callbacked;
	wait_queue_head_t callback_wait;
	struct amdtp_stream *sync_slave;
};

int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
		      enum amdtp_stream_direction dir,
		      enum cip_flags flags);
void amdtp_stream_destroy(struct amdtp_stream *s);

void amdtp_stream_set_parameters(struct amdtp_stream *s,
				 unsigned int rate,
				 unsigned int pcm_channels,
				 unsigned int midi_ports);
unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s);

int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed);
void amdtp_stream_update(struct amdtp_stream *s);
void amdtp_stream_stop(struct amdtp_stream *s);

int amdtp_stream_add_pcm_hw_constraints(struct amdtp_stream *s,
					struct snd_pcm_runtime *runtime);
void amdtp_stream_set_pcm_format(struct amdtp_stream *s,
				 snd_pcm_format_t format);
void amdtp_stream_pcm_prepare(struct amdtp_stream *s);
unsigned long amdtp_stream_pcm_pointer(struct amdtp_stream *s);
void amdtp_stream_pcm_abort(struct amdtp_stream *s);

extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT];
extern const unsigned int amdtp_rate_table[CIP_SFC_COUNT];

/**
 * amdtp_stream_running - check stream is running or not
 * @s: the AMDTP stream
 *
 * If this function returns true, the stream is running.
 */
static inline bool amdtp_stream_running(struct amdtp_stream *s)
{
	return !IS_ERR(s->context);
}

/**
 * amdtp_streaming_error - check for streaming error
 * @s: the AMDTP stream
 *
 * If this function returns true, the stream's packet queue has stopped due to
 * an asynchronous error.
 */
static inline bool amdtp_streaming_error(struct amdtp_stream *s)
{
	return s->packet_index < 0;
}

/**
 * amdtp_stream_pcm_running - check PCM substream is running or not
 * @s: the AMDTP stream
 *
 * If this function returns true, PCM substream in the AMDTP stream is running.
 */
static inline bool amdtp_stream_pcm_running(struct amdtp_stream *s)
{
	return !!s->pcm;
}

/**
 * amdtp_stream_pcm_trigger - start/stop playback from a PCM device
 * @s: the AMDTP stream
 * @pcm: the PCM device to be started, or %NULL to stop the current device
 *
 * Call this function on a running isochronous stream to enable the actual
 * transmission of PCM data.  This function should be called from the PCM
 * device's .trigger callback.
 */
static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s,
					    struct snd_pcm_substream *pcm)
{
	ACCESS_ONCE(s->pcm) = pcm;
}

/**
 * amdtp_stream_midi_trigger - start/stop playback/capture with a MIDI device
 * @s: the AMDTP stream
 * @port: index of MIDI port
 * @midi: the MIDI device to be started, or %NULL to stop the current device
 *
 * Call this function on a running isochronous stream to enable the actual
 * transmission of MIDI data.  This function should be called from the MIDI
 * device's .trigger callback.
 */
static inline void amdtp_stream_midi_trigger(struct amdtp_stream *s,
					     unsigned int port,
					     struct snd_rawmidi_substream *midi)
{
	if (port < s->midi_ports)
		ACCESS_ONCE(s->midi[port]) = midi;
}

static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc)
{
	return sfc & 1;
}

static inline void amdtp_stream_set_sync(enum cip_flags sync_mode,
					 struct amdtp_stream *master,
					 struct amdtp_stream *slave)
{
	if (sync_mode == CIP_SYNC_TO_DEVICE) {
		master->flags |= CIP_SYNC_TO_DEVICE;
		slave->flags |= CIP_SYNC_TO_DEVICE;
		master->sync_slave = slave;
	} else {
		master->flags &= ~CIP_SYNC_TO_DEVICE;
		slave->flags &= ~CIP_SYNC_TO_DEVICE;
		master->sync_slave = NULL;
	}

	slave->sync_slave = NULL;
}

/**
 * amdtp_stream_wait_callback - sleep till callbacked or timeout
 * @s: the AMDTP stream
 * @timeout: msec till timeout
 *
 * If this function return false, the AMDTP stream should be stopped.
 */
static inline bool amdtp_stream_wait_callback(struct amdtp_stream *s,
					      unsigned int timeout)
{
	return wait_event_timeout(s->callback_wait,
				  s->callbacked == true,
				  msecs_to_jiffies(timeout)) > 0;
}

#endif
Commit	Line	Data
31ef9134 CL	1	#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED
	2	#define SOUND_FIREWIRE_AMDTP_H_INCLUDED
	3
20b65dd0	4	#include <linux/err.h>
76fb8789	5	#include <linux/interrupt.h>
31ef9134	6	#include <linux/mutex.h>
777fb574	7	#include <sound/asound.h>
31ef9134 CL	8	#include "packets-buffer.h"
	9
	10	/**
be4a2894	11	* enum cip_flags - describes details of the streaming protocol
31ef9134 CL	12	* @CIP_NONBLOCKING: In non-blocking mode, each packet contains
	13	* sample_rate/8000 samples, with rounding up or down to adjust
	14	* for clock skew and left-over fractional samples. This should
	15	* be used if supported by the device.
e84d15f6 CL	16	* @CIP_BLOCKING: In blocking mode, each packet contains either zero or
	17	* SYT_INTERVAL samples, with these two types alternating so that
	18	* the overall sample rate comes out right.
7b3b0d85 TS	19	* @CIP_SYNC_TO_DEVICE: In sync to device mode, time stamp in out packets is
7b3b0d85 TS	20	* generated by in packets. Defaultly this driver generates timestamp.
7ab56645	21	* @CIP_EMPTY_WITH_TAG0: Only for in-stream. Empty in-packets have TAG0.
c8bdf49b TS	22	* @CIP_DBC_IS_END_EVENT: Only for in-stream. The value of dbc in an in-packet
c8bdf49b TS	23	* corresponds to the end of event in the packet. Out of IEC 61883.
69702239 TS	24	* @CIP_WRONG_DBS: Only for in-stream. The value of dbs is wrong in in-packets.
69702239 TS	25	* The value of data_block_quadlets is used instead of reported value.
5f217f90	26	* @CIP_SKIP_DBC_ZERO_CHECK: Only for in-stream. Packets with zero in dbc is
b84b1a27	27	* skipped for detecting discontinuity.
b6bc8123 TS	28	* @CIP_SKIP_INIT_DBC_CHECK: Only for in-stream. The value of dbc in first
b6bc8123 TS	29	* packet is not continuous from an initial value.
9d59124c TS	30	* @CIP_EMPTY_HAS_WRONG_DBC: Only for in-stream. The value of dbc in empty
9d59124c TS	31	* packet is wrong but the others are correct.
31ef9134	32	*/
be4a2894	33	enum cip_flags {
7b3b0d85 TS	34	CIP_NONBLOCKING = 0x00,
7b3b0d85 TS	35	CIP_BLOCKING = 0x01,
10550bea	36	CIP_SYNC_TO_DEVICE = 0x02,
7ab56645	37	CIP_EMPTY_WITH_TAG0 = 0x04,
c8bdf49b	38	CIP_DBC_IS_END_EVENT = 0x08,
69702239	39	CIP_WRONG_DBS = 0x10,
b84b1a27	40	CIP_SKIP_DBC_ZERO_CHECK = 0x20,
b6bc8123	41	CIP_SKIP_INIT_DBC_CHECK = 0x40,
9d59124c	42	CIP_EMPTY_HAS_WRONG_DBC = 0x80,
31ef9134 CL	43	};
	44
	45	/**
5f217f90 TS	46	* enum cip_sfc - supported Sampling Frequency Codes (SFCs)
	47	* @CIP_SFC_32000: 32,000 data blocks
	48	* @CIP_SFC_44100: 44,100 data blocks
	49	* @CIP_SFC_48000: 48,000 data blocks
	50	* @CIP_SFC_88200: 88,200 data blocks
	51	* @CIP_SFC_96000: 96,000 data blocks
	52	* @CIP_SFC_176400: 176,400 data blocks
	53	* @CIP_SFC_192000: 192,000 data blocks
	54	* @CIP_SFC_COUNT: the number of supported SFCs
	55	*
	56	* These values are used to show nominal Sampling Frequency Code in
	57	* Format Dependent Field (FDF) of AMDTP packet header. In IEC 61883-6:2002,
	58	* this code means the number of events per second. Actually the code
	59	* represents the number of data blocks transferred per second in an AMDTP
	60	* stream.
	61	*
	62	* In IEC 61883-6:2005, some extensions were added to support more types of
	63	* data such as 'One Bit LInear Audio', therefore the meaning of SFC became
	64	* different depending on the types.
	65	*
	66	* Currently our implementation is compatible with IEC 61883-6:2002.
31ef9134 CL	67	*/
	68	enum cip_sfc {
	69	CIP_SFC_32000 = 0,
	70	CIP_SFC_44100 = 1,
	71	CIP_SFC_48000 = 2,
	72	CIP_SFC_88200 = 3,
	73	CIP_SFC_96000 = 4,
	74	CIP_SFC_176400 = 5,
	75	CIP_SFC_192000 = 6,
a7304e3b	76	CIP_SFC_COUNT
31ef9134 CL	77	};
31ef9134 CL	78
2b3fc456 TS	79	#define AMDTP_IN_PCM_FORMAT_BITS SNDRV_PCM_FMTBIT_S32
2b3fc456 TS	80
31ef9134 CL	81	#define AMDTP_OUT_PCM_FORMAT_BITS (SNDRV_PCM_FMTBIT_S16 \| \
	82	SNDRV_PCM_FMTBIT_S32)
	83
83d8d72d	84
77d2a8a4 TS	85	/*
	86	* This module supports maximum 64 PCM channels for one PCM stream
	87	* This is for our convenience.
	88	*/
	89	#define AMDTP_MAX_CHANNELS_FOR_PCM 64
	90
83d8d72d TS	91	/*
	92	* AMDTP packet can include channels for MIDI conformant data.
	93	* Each MIDI conformant data channel includes 8 MPX-MIDI data stream.
	94	* Each MPX-MIDI data stream includes one data stream from/to MIDI ports.
	95	*
	96	* This module supports maximum 1 MIDI conformant data channels.
	97	* Then this AMDTP packets can transfer maximum 8 MIDI data streams.
	98	*/
	99	#define AMDTP_MAX_CHANNELS_FOR_MIDI 1
	100
31ef9134 CL	101	struct fw_unit;
	102	struct fw_iso_context;
	103	struct snd_pcm_substream;
7b2d99fa	104	struct snd_pcm_runtime;
83d8d72d	105	struct snd_rawmidi_substream;
31ef9134	106
3ff7e8f0 TS	107	enum amdtp_stream_direction {
	108	AMDTP_OUT_STREAM = 0,
	109	AMDTP_IN_STREAM
	110	};
	111
be4a2894	112	struct amdtp_stream {
31ef9134	113	struct fw_unit *unit;
be4a2894	114	enum cip_flags flags;
3ff7e8f0	115	enum amdtp_stream_direction direction;
31ef9134 CL	116	struct fw_iso_context *context;
	117	struct mutex mutex;
	118
	119	enum cip_sfc sfc;
	120	unsigned int data_block_quadlets;
	121	unsigned int pcm_channels;
	122	unsigned int midi_ports;
be4a2894	123	void (transfer_samples)(struct amdtp_stream s,
31ef9134 CL	124	struct snd_pcm_substream *pcm,
31ef9134 CL	125	__be32 *buffer, unsigned int frames);
77d2a8a4 TS	126	u8 pcm_positions[AMDTP_MAX_CHANNELS_FOR_PCM];
77d2a8a4 TS	127	u8 midi_position;
31ef9134 CL	128
31ef9134 CL	129	unsigned int syt_interval;
e84d15f6	130	unsigned int transfer_delay;
31ef9134 CL	131	unsigned int source_node_id_field;
	132	struct iso_packets_buffer buffer;
	133
	134	struct snd_pcm_substream *pcm;
76fb8789	135	struct tasklet_struct period_tasklet;
31ef9134	136
ec00f5e4	137	int packet_index;
31ef9134 CL	138	unsigned int data_block_counter;
	139
	140	unsigned int data_block_state;
	141
	142	unsigned int last_syt_offset;
	143	unsigned int syt_offset_state;
	144
	145	unsigned int pcm_buffer_pointer;
	146	unsigned int pcm_period_pointer;
92b862c7	147	bool pointer_flush;
65845f29	148	bool double_pcm_frames;
83d8d72d TS	149
83d8d72d TS	150	struct snd_rawmidi_substream midi[AMDTP_MAX_CHANNELS_FOR_MIDI 8];
25ca917c CL	151	int midi_fifo_limit;
25ca917c CL	152	int midi_fifo_used[AMDTP_MAX_CHANNELS_FOR_MIDI * 8];
7b3b0d85	153
d9cd0065 TS	154	/* quirk: fixed interval of dbc between previos/current packets. */
	155	unsigned int tx_dbc_interval;
	156
7b3b0d85 TS	157	bool callbacked;
	158	wait_queue_head_t callback_wait;
	159	struct amdtp_stream *sync_slave;
31ef9134 CL	160	};
31ef9134 CL	161
be4a2894	162	int amdtp_stream_init(struct amdtp_stream s, struct fw_unit unit,
3ff7e8f0	163	enum amdtp_stream_direction dir,
be4a2894 TS	164	enum cip_flags flags);
be4a2894 TS	165	void amdtp_stream_destroy(struct amdtp_stream *s);
31ef9134	166
be4a2894 TS	167	void amdtp_stream_set_parameters(struct amdtp_stream *s,
	168	unsigned int rate,
	169	unsigned int pcm_channels,
	170	unsigned int midi_ports);
	171	unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s);
31ef9134	172
be4a2894 TS	173	int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed);
	174	void amdtp_stream_update(struct amdtp_stream *s);
	175	void amdtp_stream_stop(struct amdtp_stream *s);
31ef9134	176
7b2d99fa TS	177	int amdtp_stream_add_pcm_hw_constraints(struct amdtp_stream *s,
7b2d99fa TS	178	struct snd_pcm_runtime *runtime);
be4a2894 TS	179	void amdtp_stream_set_pcm_format(struct amdtp_stream *s,
	180	snd_pcm_format_t format);
	181	void amdtp_stream_pcm_prepare(struct amdtp_stream *s);
	182	unsigned long amdtp_stream_pcm_pointer(struct amdtp_stream *s);
	183	void amdtp_stream_pcm_abort(struct amdtp_stream *s);
31ef9134	184
c5280e99	185	extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT];
1017abed	186	extern const unsigned int amdtp_rate_table[CIP_SFC_COUNT];
a7304e3b	187
be4a2894 TS	188	/**
	189	* amdtp_stream_running - check stream is running or not
	190	* @s: the AMDTP stream
	191	*
	192	* If this function returns true, the stream is running.
	193	*/
	194	static inline bool amdtp_stream_running(struct amdtp_stream *s)
20b65dd0 CL	195	{
	196	return !IS_ERR(s->context);
	197	}
	198
ec00f5e4	199	/**
be4a2894 TS	200	* amdtp_streaming_error - check for streaming error
be4a2894 TS	201	* @s: the AMDTP stream
ec00f5e4 CL	202	*
	203	* If this function returns true, the stream's packet queue has stopped due to
	204	* an asynchronous error.
	205	*/
be4a2894	206	static inline bool amdtp_streaming_error(struct amdtp_stream *s)
ec00f5e4 CL	207	{
	208	return s->packet_index < 0;
	209	}
	210
83d8d72d TS	211	/**
	212	* amdtp_stream_pcm_running - check PCM substream is running or not
	213	* @s: the AMDTP stream
	214	*
	215	* If this function returns true, PCM substream in the AMDTP stream is running.
	216	*/
	217	static inline bool amdtp_stream_pcm_running(struct amdtp_stream *s)
	218	{
	219	return !!s->pcm;
	220	}
	221
31ef9134	222	/**
be4a2894 TS	223	* amdtp_stream_pcm_trigger - start/stop playback from a PCM device
be4a2894 TS	224	* @s: the AMDTP stream
31ef9134 CL	225	* @pcm: the PCM device to be started, or %NULL to stop the current device
	226	*
	227	* Call this function on a running isochronous stream to enable the actual
	228	* transmission of PCM data. This function should be called from the PCM
	229	* device's .trigger callback.
	230	*/
be4a2894 TS	231	static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s,
be4a2894 TS	232	struct snd_pcm_substream *pcm)
31ef9134 CL	233	{
	234	ACCESS_ONCE(s->pcm) = pcm;
	235	}
	236
83d8d72d TS	237	/**
	238	* amdtp_stream_midi_trigger - start/stop playback/capture with a MIDI device
	239	* @s: the AMDTP stream
	240	* @port: index of MIDI port
	241	* @midi: the MIDI device to be started, or %NULL to stop the current device
	242	*
	243	* Call this function on a running isochronous stream to enable the actual
	244	* transmission of MIDI data. This function should be called from the MIDI
	245	* device's .trigger callback.
	246	*/
	247	static inline void amdtp_stream_midi_trigger(struct amdtp_stream *s,
	248	unsigned int port,
	249	struct snd_rawmidi_substream *midi)
	250	{
	251	if (port < s->midi_ports)
	252	ACCESS_ONCE(s->midi[port]) = midi;
	253	}
	254
31ef9134 CL	255	static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc)
	256	{
	257	return sfc & 1;
	258	}
	259
7b3b0d85 TS	260	static inline void amdtp_stream_set_sync(enum cip_flags sync_mode,
	261	struct amdtp_stream *master,
	262	struct amdtp_stream *slave)
	263	{
	264	if (sync_mode == CIP_SYNC_TO_DEVICE) {
	265	master->flags \|= CIP_SYNC_TO_DEVICE;
	266	slave->flags \|= CIP_SYNC_TO_DEVICE;
	267	master->sync_slave = slave;
	268	} else {
	269	master->flags &= ~CIP_SYNC_TO_DEVICE;
	270	slave->flags &= ~CIP_SYNC_TO_DEVICE;
	271	master->sync_slave = NULL;
	272	}
	273
	274	slave->sync_slave = NULL;
	275	}
	276
	277	/**
	278	* amdtp_stream_wait_callback - sleep till callbacked or timeout
	279	* @s: the AMDTP stream
	280	* @timeout: msec till timeout
	281	*
	282	* If this function return false, the AMDTP stream should be stopped.
	283	*/
	284	static inline bool amdtp_stream_wait_callback(struct amdtp_stream *s,
	285	unsigned int timeout)
	286	{
	287	return wait_event_timeout(s->callback_wait,
	288	s->callbacked == true,
	289	msecs_to_jiffies(timeout)) > 0;
	290	}
	291
31ef9134	292	#endif