diff options
Diffstat (limited to 'sound/firewire/amdtp-stream.h')
| -rw-r--r-- | sound/firewire/amdtp-stream.h | 105 |
1 files changed, 69 insertions, 36 deletions
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index a3daa1f2c1c4..1f957c946c95 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -35,6 +35,8 @@ * @CIP_NO_HEADERS: a lack of headers in packets * @CIP_UNALIGHED_DBC: Only for in-stream. The value of dbc is not alighed to * the value of current SYT_INTERVAL; e.g. initial value is not zero. + * @CIP_UNAWARE_SYT: For outgoing packet, the value in SYT field of CIP is 0xffff. + * For incoming packet, the value in SYT field of CIP is not handled. */ enum cip_flags { CIP_NONBLOCKING = 0x00, @@ -48,6 +50,7 @@ enum cip_flags { CIP_HEADER_WITHOUT_EOH = 0x80, CIP_NO_HEADER = 0x100, CIP_UNALIGHED_DBC = 0x200, + CIP_UNAWARE_SYT = 0x400, }; /** @@ -112,7 +115,8 @@ typedef unsigned int (*amdtp_stream_process_ctx_payloads_t)( struct amdtp_domain; struct amdtp_stream { struct fw_unit *unit; - enum cip_flags flags; + // The combination of cip_flags enumeration-constants. + unsigned int flags; enum amdtp_stream_direction direction; struct mutex mutex; @@ -134,19 +138,37 @@ struct amdtp_stream { // Fixed interval of dbc between previos/current // packets. unsigned int dbc_interval; + + // The device starts multiplexing events to the packet. + bool event_starts; + + struct { + struct seq_desc *descs; + unsigned int size; + unsigned int tail; + } cache; } tx; struct { - // To calculate CIP data blocks and tstamp. - unsigned int transfer_delay; - unsigned int seq_index; - // To generate CIP header. unsigned int fdf; - int syt_override; // To generate constant hardware IRQ. unsigned int event_count; - unsigned int events_per_period; + + // To calculate CIP data blocks and tstamp. + struct { + struct seq_desc *descs; + unsigned int size; + unsigned int tail; + unsigned int head; + } seq; + + unsigned int data_block_state; + unsigned int syt_offset_state; + unsigned int last_syt_offset; + + struct amdtp_stream *replay_target; + unsigned int cache_head; } rx; } ctx_data; @@ -157,20 +179,21 @@ struct amdtp_stream { unsigned int sph; unsigned int fmt; - /* Internal flags. */ + // Internal flags. + unsigned int transfer_delay; enum cip_sfc sfc; unsigned int syt_interval; /* For a PCM substream processing. */ struct snd_pcm_substream *pcm; - struct work_struct period_work; snd_pcm_uframes_t pcm_buffer_pointer; unsigned int pcm_period_pointer; - /* To wait for first packet. */ - bool callbacked; - wait_queue_head_t callback_wait; - u32 start_cycle; + // To start processing content of packets at the same cycle in several contexts for + // each direction. + bool ready_processing; + wait_queue_head_t ready_wait; + unsigned int next_cycle; /* For backends to process data blocks. */ void *protocol; @@ -184,7 +207,7 @@ struct amdtp_stream { }; int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit, - enum amdtp_stream_direction dir, enum cip_flags flags, + enum amdtp_stream_direction dir, unsigned int flags, unsigned int fmt, amdtp_stream_process_ctx_payloads_t process_ctx_payloads, unsigned int protocol_size); @@ -259,21 +282,6 @@ static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc) return sfc & 1; } -/** - * 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, - msecs_to_jiffies(timeout)) > 0; -} - struct seq_desc { unsigned int syt_offset; unsigned int data_blocks; @@ -287,13 +295,16 @@ struct amdtp_domain { struct amdtp_stream *irq_target; - struct seq_desc *seq_descs; - unsigned int seq_size; - unsigned int seq_tail; + struct { + unsigned int tx_init_skip; + unsigned int tx_start; + unsigned int rx_start; + } processing_cycle; - unsigned int data_block_state; - unsigned int syt_offset_state; - unsigned int last_syt_offset; + struct { + bool enable:1; + bool on_the_fly:1; + } replay; }; int amdtp_domain_init(struct amdtp_domain *d); @@ -302,7 +313,8 @@ void amdtp_domain_destroy(struct amdtp_domain *d); int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s, int channel, int speed); -int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle); +int amdtp_domain_start(struct amdtp_domain *d, unsigned int tx_init_skip_cycles, bool replay_seq, + bool replay_on_the_fly); void amdtp_domain_stop(struct amdtp_domain *d); static inline int amdtp_domain_set_events_per_period(struct amdtp_domain *d, @@ -319,4 +331,25 @@ unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d, struct amdtp_stream *s); int amdtp_domain_stream_pcm_ack(struct amdtp_domain *d, struct amdtp_stream *s); +/** + * amdtp_domain_wait_ready - sleep till being ready to process packets or timeout + * @d: the AMDTP domain + * @timeout_ms: msec till timeout + * + * If this function return false, the AMDTP domain should be stopped. + */ +static inline bool amdtp_domain_wait_ready(struct amdtp_domain *d, unsigned int timeout_ms) +{ + struct amdtp_stream *s; + + list_for_each_entry(s, &d->streams, list) { + unsigned int j = msecs_to_jiffies(timeout_ms); + + if (wait_event_interruptible_timeout(s->ready_wait, s->ready_processing, j) <= 0) + return false; + } + + return true; +} + #endif |