@@ -83,7 +83,7 @@ int amdtp_am824_set_parameters(struct amdtp_stream *s, unsigned int rate,
if (err < 0)
return err;
- s->fdf = AMDTP_FDF_AM824 | s->sfc;
+ s->ctx_data.rx.fdf = AMDTP_FDF_AM824 | s->sfc;
p->pcm_channels = pcm_channels;
p->midi_ports = midi_ports;
@@ -260,11 +260,18 @@ int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate,
s->data_block_quadlets = data_block_quadlets;
s->syt_interval = amdtp_syt_intervals[sfc];
- /* default buffering in the device */
- s->transfer_delay = TRANSFER_DELAY_TICKS - TICKS_PER_CYCLE;
- if (s->flags & CIP_BLOCKING)
- /* additional buffering needed to adjust for no-data packets */
- s->transfer_delay += TICKS_PER_SECOND * s->syt_interval / rate;
+ // default buffering in the device.
+ if (s->direction == AMDTP_OUT_STREAM) {
+ s->ctx_data.rx.transfer_delay =
+ TRANSFER_DELAY_TICKS - TICKS_PER_CYCLE;
+
+ if (s->flags & CIP_BLOCKING) {
+ // additional buffering needed to adjust for no-data
+ // packets.
+ s->ctx_data.rx.transfer_delay +=
+ TICKS_PER_SECOND * s->syt_interval / rate;
+ }
+ }
return 0;
}
@@ -321,10 +328,10 @@ static unsigned int calculate_data_blocks(struct amdtp_stream *s,
/* Non-blocking mode. */
} else {
if (!cip_sfc_is_base_44100(s->sfc)) {
- /* Sample_rate / 8000 is an integer, and precomputed. */
- data_blocks = s->data_block_state;
+ // Sample_rate / 8000 is an integer, and precomputed.
+ data_blocks = s->ctx_data.rx.data_block_state;
} else {
- phase = s->data_block_state;
+ phase = s->ctx_data.rx.data_block_state;
/*
* This calculates the number of data blocks per packet so that
@@ -343,7 +350,7 @@ static unsigned int calculate_data_blocks(struct amdtp_stream *s,
data_blocks = 11 * (s->sfc >> 1) + (phase == 0);
if (++phase >= (80 >> (s->sfc >> 1)))
phase = 0;
- s->data_block_state = phase;
+ s->ctx_data.rx.data_block_state = phase;
}
}
@@ -355,9 +362,10 @@ static unsigned int calculate_syt(struct amdtp_stream *s,
{
unsigned int syt_offset, phase, index, syt;
- if (s->last_syt_offset < TICKS_PER_CYCLE) {
+ if (s->ctx_data.rx.last_syt_offset < TICKS_PER_CYCLE) {
if (!cip_sfc_is_base_44100(s->sfc))
- syt_offset = s->last_syt_offset + s->syt_offset_state;
+ syt_offset = s->ctx_data.rx.last_syt_offset +
+ s->ctx_data.rx.syt_offset_state;
else {
/*
* The time, in ticks, of the n'th SYT_INTERVAL sample is:
@@ -369,21 +377,21 @@ static unsigned int calculate_syt(struct amdtp_stream *s,
* 1386 1386 1387 1386 1386 1386 1387 1386 1386 1386 1387 ...
* This code generates _exactly_ the same sequence.
*/
- phase = s->syt_offset_state;
+ phase = s->ctx_data.rx.syt_offset_state;
index = phase % 13;
- syt_offset = s->last_syt_offset;
+ syt_offset = s->ctx_data.rx.last_syt_offset;
syt_offset += 1386 + ((index && !(index & 3)) ||
phase == 146);
if (++phase >= 147)
phase = 0;
- s->syt_offset_state = phase;
+ s->ctx_data.rx.syt_offset_state = phase;
}
} else
- syt_offset = s->last_syt_offset - TICKS_PER_CYCLE;
- s->last_syt_offset = syt_offset;
+ syt_offset = s->ctx_data.rx.last_syt_offset - TICKS_PER_CYCLE;
+ s->ctx_data.rx.last_syt_offset = syt_offset;
if (syt_offset < TICKS_PER_CYCLE) {
- syt_offset += s->transfer_delay;
+ syt_offset += s->ctx_data.rx.transfer_delay;
syt = (cycle + syt_offset / TICKS_PER_CYCLE) << 12;
syt += syt_offset % TICKS_PER_CYCLE;
@@ -457,7 +465,8 @@ static inline int queue_out_packet(struct amdtp_stream *s,
static inline int queue_in_packet(struct amdtp_stream *s)
{
- return queue_packet(s, IR_HEADER_SIZE, s->max_payload_length);
+ return queue_packet(s, s->ctx_data.tx.ctx_header_size,
+ s->ctx_data.tx.max_payload_length);
}
static int handle_out_packet(struct amdtp_stream *s,
@@ -484,9 +493,9 @@ static int handle_out_packet(struct amdtp_stream *s,
((s->sph << CIP_SPH_SHIFT) & CIP_SPH_MASK) |
s->data_block_counter);
buffer[1] = cpu_to_be32(CIP_EOH |
- ((s->fmt << CIP_FMT_SHIFT) & CIP_FMT_MASK) |
- ((s->fdf << CIP_FDF_SHIFT) & CIP_FDF_MASK) |
- (syt & CIP_SYT_MASK));
+ ((s->fmt << CIP_FMT_SHIFT) & CIP_FMT_MASK) |
+ ((s->ctx_data.rx.fdf << CIP_FDF_SHIFT) & CIP_FDF_MASK) |
+ (syt & CIP_SYT_MASK));
if (!(s->flags & CIP_DBC_IS_END_EVENT))
s->data_block_counter =
@@ -610,14 +619,14 @@ static int handle_in_packet(struct amdtp_stream *s,
data_block_counter = s->data_block_counter;
if (((s->flags & CIP_SKIP_DBC_ZERO_CHECK) &&
- data_block_counter == s->tx_first_dbc) ||
+ data_block_counter == s->ctx_data.tx.first_dbc) ||
s->data_block_counter == UINT_MAX) {
lost = false;
} else if (!(s->flags & CIP_DBC_IS_END_EVENT)) {
lost = data_block_counter != s->data_block_counter;
} else {
- if (data_blocks > 0 && s->tx_dbc_interval > 0)
- dbc_interval = s->tx_dbc_interval;
+ if (data_blocks > 0 && s->ctx_data.tx.dbc_interval > 0)
+ dbc_interval = s->ctx_data.tx.dbc_interval;
else
dbc_interval = data_blocks;
@@ -740,11 +749,11 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
if (s->packet_index < 0)
return;
- /* The number of packets in buffer */
- packets = header_length / IR_HEADER_SIZE;
+ // The number of packets in buffer.
+ packets = header_length / s->ctx_data.tx.ctx_header_size;
/* For buffer-over-run prevention. */
- max_payload_length = s->max_payload_length;
+ max_payload_length = s->ctx_data.tx.max_payload_length;
for (i = 0; i < packets; i++) {
u32 iso_header = be32_to_cpu(ctx_header[0]);
@@ -765,7 +774,7 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
if (s->handle_packet(s, payload_length, cycle, i) < 0)
break;
- ctx_header += IR_HEADER_SIZE / sizeof(__be32);
+ ctx_header += s->ctx_data.tx.ctx_header_size / sizeof(*ctx_header);
}
/* Queueing error or detecting invalid payload. */
@@ -837,7 +846,7 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed)
static const struct {
unsigned int data_block;
unsigned int syt_offset;
- } initial_state[] = {
+ } *entry, initial_state[] = {
[CIP_SFC_32000] = { 4, 3072 },
[CIP_SFC_48000] = { 6, 1024 },
[CIP_SFC_96000] = { 12, 1024 },
@@ -846,7 +855,7 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed)
[CIP_SFC_88200] = { 0, 67 },
[CIP_SFC_176400] = { 0, 67 },
};
- unsigned int header_size;
+ unsigned int ctx_header_size;
enum dma_data_direction dir;
int type, tag, err;
@@ -858,23 +867,26 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed)
goto err_unlock;
}
- if (s->direction == AMDTP_IN_STREAM)
+ if (s->direction == AMDTP_IN_STREAM) {
s->data_block_counter = UINT_MAX;
- else
+ } else {
+ entry = &initial_state[s->sfc];
+
s->data_block_counter = 0;
- s->data_block_state = initial_state[s->sfc].data_block;
- s->syt_offset_state = initial_state[s->sfc].syt_offset;
- s->last_syt_offset = TICKS_PER_CYCLE;
+ s->ctx_data.rx.data_block_state = entry->data_block;
+ s->ctx_data.rx.syt_offset_state = entry->syt_offset;
+ s->ctx_data.rx.last_syt_offset = TICKS_PER_CYCLE;
+ }
/* initialize packet buffer */
if (s->direction == AMDTP_IN_STREAM) {
dir = DMA_FROM_DEVICE;
type = FW_ISO_CONTEXT_RECEIVE;
- header_size = IR_HEADER_SIZE;
+ ctx_header_size = IR_HEADER_SIZE;
} else {
dir = DMA_TO_DEVICE;
type = FW_ISO_CONTEXT_TRANSMIT;
- header_size = OUT_PACKET_HEADER_SIZE;
+ ctx_header_size = OUT_PACKET_HEADER_SIZE;
}
err = iso_packets_buffer_init(&s->buffer, s->unit, QUEUE_LENGTH,
amdtp_stream_get_max_payload(s), dir);
@@ -882,8 +894,8 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed)
goto err_unlock;
s->context = fw_iso_context_create(fw_parent_device(s->unit)->card,
- type, channel, speed, header_size,
- amdtp_stream_first_callback, s);
+ type, channel, speed, ctx_header_size,
+ amdtp_stream_first_callback, s);
if (IS_ERR(s->context)) {
err = PTR_ERR(s->context);
if (err == -EBUSY)
@@ -894,8 +906,11 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed)
amdtp_stream_update(s);
- if (s->direction == AMDTP_IN_STREAM)
- s->max_payload_length = amdtp_stream_get_max_payload(s);
+ if (s->direction == AMDTP_IN_STREAM) {
+ s->ctx_data.tx.max_payload_length =
+ amdtp_stream_get_max_payload(s);
+ s->ctx_data.tx.ctx_header_size = ctx_header_size;
+ }
if (s->flags & CIP_NO_HEADER)
s->tag = TAG_NO_CIP_HEADER;
@@ -111,7 +111,31 @@ struct amdtp_stream {
int (*handle_packet)(struct amdtp_stream *s,
unsigned int payload_quadlets, unsigned int cycle,
unsigned int index);
- unsigned int max_payload_length;
+ union {
+ struct {
+ unsigned int ctx_header_size;
+
+ // limit for payload of iso packet.
+ unsigned int max_payload_length;
+
+ // For quirks of CIP headers.
+ // Fixed interval of dbc between previos/current
+ // packets.
+ unsigned int dbc_interval;
+ // Indicate the value of dbc field in a first packet.
+ unsigned int first_dbc;
+ } tx;
+ struct {
+ // To calculate CIP data blocks and tstamp.
+ unsigned int transfer_delay;
+ unsigned int data_block_state;
+ unsigned int last_syt_offset;
+ unsigned int syt_offset_state;
+
+ // To generate CIP header.
+ unsigned int fdf;
+ } rx;
+ } ctx_data;
/* For CIP headers. */
unsigned int source_node_id_field;
@@ -119,19 +143,10 @@ struct amdtp_stream {
unsigned int data_block_counter;
unsigned int sph;
unsigned int fmt;
- unsigned int fdf;
- /* quirk: fixed interval of dbc between previos/current packets. */
- unsigned int tx_dbc_interval;
- /* quirk: indicate the value of dbc field in a first packet. */
- unsigned int tx_first_dbc;
/* Internal flags. */
enum cip_sfc sfc;
unsigned int syt_interval;
- unsigned int transfer_delay;
- unsigned int data_block_state;
- unsigned int last_syt_offset;
- unsigned int syt_offset_state;
/* For a PCM substream processing. */
struct snd_pcm_substream *pcm;
@@ -128,7 +128,7 @@ int amdtp_dot_set_parameters(struct amdtp_stream *s, unsigned int rate,
if (err < 0)
return err;
- s->fdf = AMDTP_FDF_AM824 | s->sfc;
+ s->ctx_data.rx.fdf = AMDTP_FDF_AM824 | s->sfc;
p->pcm_channels = pcm_channels;
@@ -165,13 +165,13 @@ int snd_efw_stream_init_duplex(struct snd_efw *efw)
(efw->firmware_version == 0x5070000 ||
efw->firmware_version == 0x5070300 ||
efw->firmware_version == 0x5080000))
- efw->tx_stream.tx_first_dbc = 0x02;
+ efw->tx_stream.ctx_data.tx.first_dbc = 0x02;
/* AudioFire9 always reports wrong dbs. */
if (efw->is_af9)
efw->tx_stream.flags |= CIP_WRONG_DBS;
/* Firmware version 5.5 reports fixed interval for dbc. */
if (efw->firmware_version == 0x5050000)
- efw->tx_stream.tx_dbc_interval = 8;
+ efw->tx_stream.ctx_data.tx.dbc_interval = 8;
err = init_stream(efw, &efw->rx_stream);
if (err < 0) {
@@ -429,7 +429,7 @@ int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
return err;
s->sph = 1;
- s->fdf = MOTU_FDF_AM824;
+ s->ctx_data.rx.fdf = MOTU_FDF_AM824;
return 0;
}
@@ -224,7 +224,7 @@ int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit,
return 0;
/* Use fixed value for FDF field. */
- s->fdf = 0x00;
+ s->ctx_data.rx.fdf = 0x00;
/* This protocol uses fixed number of data channels for PCM samples. */
p = s->protocol;
Some parameters of struct amdtp_stream is dependent on direction. This commit uses union for such parameters to distinguish from common parameters. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> --- sound/firewire/amdtp-am824.c | 2 +- sound/firewire/amdtp-stream.c | 97 ++++++++++++--------- sound/firewire/amdtp-stream.h | 35 +++++--- sound/firewire/digi00x/amdtp-dot.c | 2 +- sound/firewire/fireworks/fireworks_stream.c | 4 +- sound/firewire/motu/amdtp-motu.c | 2 +- sound/firewire/tascam/amdtp-tascam.c | 2 +- 7 files changed, 87 insertions(+), 57 deletions(-)