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ALSA: firewire-lib: split helper function to generate CIP header
This is minor code refactoring to split a function to generate CIP header. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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e4e07c6cdc
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252219c7b3
1 changed files with 14 additions and 8 deletions
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@ -477,6 +477,19 @@ static inline int queue_in_packet(struct amdtp_stream *s)
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return queue_packet(s, s->ctx_data.tx.max_ctx_payload_length);
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}
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static void generate_cip_header(struct amdtp_stream *s, __be32 cip_header[2],
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unsigned int syt)
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{
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cip_header[0] = cpu_to_be32(READ_ONCE(s->source_node_id_field) |
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(s->data_block_quadlets << CIP_DBS_SHIFT) |
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((s->sph << CIP_SPH_SHIFT) & CIP_SPH_MASK) |
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s->data_block_counter);
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cip_header[1] = cpu_to_be32(CIP_EOH |
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((s->fmt << CIP_FMT_SHIFT) & CIP_FMT_MASK) |
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((s->ctx_data.rx.fdf << CIP_FDF_SHIFT) & CIP_FDF_MASK) |
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(syt & CIP_SYT_MASK));
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}
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static int handle_out_packet(struct amdtp_stream *s, unsigned int cycle,
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const __be32 *ctx_header, __be32 *buffer,
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unsigned int index)
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@ -495,14 +508,7 @@ static int handle_out_packet(struct amdtp_stream *s, unsigned int cycle,
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s->data_block_counter =
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(s->data_block_counter + data_blocks) & 0xff;
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buffer[0] = cpu_to_be32(READ_ONCE(s->source_node_id_field) |
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(s->data_block_quadlets << CIP_DBS_SHIFT) |
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((s->sph << CIP_SPH_SHIFT) & CIP_SPH_MASK) |
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s->data_block_counter);
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buffer[1] = cpu_to_be32(CIP_EOH |
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((s->fmt << CIP_FMT_SHIFT) & CIP_FMT_MASK) |
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((s->ctx_data.rx.fdf << CIP_FDF_SHIFT) & CIP_FDF_MASK) |
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(syt & CIP_SYT_MASK));
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generate_cip_header(s, buffer, syt);
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if (!(s->flags & CIP_DBC_IS_END_EVENT))
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s->data_block_counter =
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