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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2015-05-22 14:21:12 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-05-24 06:23:36 (GMT) |
| commit | 9a2820c1189bd3165accd7663783e32935bb9055 (patch) | |
| tree | 93404a85641763a510c85b4a72226740b70f8d75 /sound/firewire/amdtp.c | |
| parent | 29bcae208179416048c49c7039c9d7a362b6c5bf (diff) | |
| download | linux-9a2820c1189bd3165accd7663783e32935bb9055.tar.xz | |
ALSA: firewire-lib: macro arrangement for code cleanup
Some macros include my misunderstanding for IEC 61883-1 or -6.
Additionally, some fixed values appear on codes.
This commit replaces these with macros with proper names.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/amdtp.c')
| -rw-r--r-- | sound/firewire/amdtp.c | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c index 9d72345..29efbda 100644 --- a/sound/firewire/amdtp.c +++ b/sound/firewire/amdtp.c @@ -40,24 +40,28 @@ #define TAG_CIP 1 /* common isochronous packet header parameters */ -#define CIP_EOH (1u << 31) +#define CIP_EOH_SHIFT 31 +#define CIP_EOH (1u << CIP_EOH_SHIFT) #define CIP_EOH_MASK 0x80000000 -#define CIP_FMT_AM (0x10 << 24) +#define CIP_SID_SHIFT 24 +#define CIP_SID_MASK 0x3f000000 +#define CIP_DBS_MASK 0x00ff0000 +#define CIP_DBS_SHIFT 16 +#define CIP_DBC_MASK 0x000000ff +#define CIP_FMT_SHIFT 24 #define CIP_FMT_MASK 0x3f000000 +#define CIP_FDF_MASK 0x00ff0000 +#define CIP_FDF_SHIFT 16 #define CIP_SYT_MASK 0x0000ffff #define CIP_SYT_NO_INFO 0xffff -#define CIP_FDF_MASK 0x00ff0000 -#define CIP_FDF_SFC_SHIFT 16 /* * Audio and Music transfer protocol specific parameters * only "Clock-based rate control mode" is supported */ -#define AMDTP_FDF_AM824 (0 << (CIP_FDF_SFC_SHIFT + 3)) +#define CIP_FMT_AM (0x10 << CIP_FMT_SHIFT) +#define AMDTP_FDF_AM824 (0 << (CIP_FDF_SHIFT + 3)) #define AMDTP_FDF_NO_DATA 0xff -#define AMDTP_DBS_MASK 0x00ff0000 -#define AMDTP_DBS_SHIFT 16 -#define AMDTP_DBC_MASK 0x000000ff /* TODO: make these configurable */ #define INTERRUPT_INTERVAL 16 @@ -656,10 +660,10 @@ static int handle_out_packet(struct amdtp_stream *s, unsigned int data_blocks, buffer = s->buffer.packets[s->packet_index].buffer; buffer[0] = cpu_to_be32(ACCESS_ONCE(s->source_node_id_field) | - (s->data_block_quadlets << AMDTP_DBS_SHIFT) | + (s->data_block_quadlets << CIP_DBS_SHIFT) | s->data_block_counter); buffer[1] = cpu_to_be32(CIP_EOH | CIP_FMT_AM | AMDTP_FDF_AM824 | - (s->sfc << CIP_FDF_SFC_SHIFT) | syt); + (s->sfc << CIP_FDF_SHIFT) | syt); buffer += 2; pcm = ACCESS_ONCE(s->pcm); @@ -712,11 +716,11 @@ static int handle_in_packet(struct amdtp_stream *s, /* Calculate data blocks */ if (payload_quadlets < 3 || ((cip_header[1] & CIP_FDF_MASK) == - (AMDTP_FDF_NO_DATA << CIP_FDF_SFC_SHIFT))) { + (AMDTP_FDF_NO_DATA << CIP_FDF_SHIFT))) { data_blocks = 0; } else { data_block_quadlets = - (cip_header[0] & AMDTP_DBS_MASK) >> AMDTP_DBS_SHIFT; + (cip_header[0] & CIP_DBS_MASK) >> CIP_DBS_SHIFT; /* avoid division by zero */ if (data_block_quadlets == 0) { dev_info_ratelimited(&s->unit->device, @@ -731,7 +735,7 @@ static int handle_in_packet(struct amdtp_stream *s, } /* Check data block counter continuity */ - data_block_counter = cip_header[0] & AMDTP_DBC_MASK; + data_block_counter = cip_header[0] & CIP_DBC_MASK; if (data_blocks == 0 && (s->flags & CIP_EMPTY_HAS_WRONG_DBC) && s->data_block_counter != UINT_MAX) data_block_counter = s->data_block_counter; @@ -1050,8 +1054,10 @@ EXPORT_SYMBOL(amdtp_stream_pcm_pointer); */ void amdtp_stream_update(struct amdtp_stream *s) { + /* Precomputing. */ ACCESS_ONCE(s->source_node_id_field) = - (fw_parent_device(s->unit)->card->node_id & 0x3f) << 24; + (fw_parent_device(s->unit)->card->node_id << CIP_SID_SHIFT) & + CIP_SID_MASK; } EXPORT_SYMBOL(amdtp_stream_update); |