#define INTERRUPT_INTERVAL 16
#define QUEUE_LENGTH 48
-#define IR_HEADER_SIZE 8 // For header and timestamp.
-#define OUT_PACKET_HEADER_SIZE 0
+// For iso header, tstamp and 2 CIP header.
+#define IR_CTX_HEADER_SIZE_CIP 16
+// For iso header and tstamp.
+#define IR_CTX_HEADER_SIZE_NO_CIP 8
#define HEADER_TSTAMP_MASK 0x0000ffff
+#define IT_PKT_HEADER_SIZE_CIP 8 // For 2 CIP header.
+#define IT_PKT_HEADER_SIZE_NO_CIP 0 // Nothing.
+
static void pcm_period_tasklet(unsigned long data);
/**
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;
}
unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s)
{
unsigned int multiplier = 1;
- unsigned int header_size = 0;
+ unsigned int cip_header_size = 0;
if (s->flags & CIP_JUMBO_PAYLOAD)
multiplier = 5;
if (!(s->flags & CIP_NO_HEADER))
- header_size = 8;
+ cip_header_size = sizeof(__be32) * 2;
- return header_size +
- s->syt_interval * s->data_block_quadlets * 4 * multiplier;
+ return cip_header_size +
+ s->syt_interval * s->data_block_quadlets * sizeof(__be32) * multiplier;
}
EXPORT_SYMBOL(amdtp_stream_get_max_payload);
/* 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
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;
}
}
{
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:
* 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;
snd_pcm_period_elapsed(pcm);
}
-static int queue_packet(struct amdtp_stream *s, unsigned int header_length,
- unsigned int payload_length)
+static int queue_packet(struct amdtp_stream *s, struct fw_iso_packet *params)
{
- struct fw_iso_packet p = {0};
- int err = 0;
+ int err;
- if (IS_ERR(s->context))
- goto end;
+ params->interrupt = IS_ALIGNED(s->packet_index + 1, INTERRUPT_INTERVAL);
+ params->tag = s->tag;
+ params->sy = 0;
- p.interrupt = IS_ALIGNED(s->packet_index + 1, INTERRUPT_INTERVAL);
- p.tag = s->tag;
- p.header_length = header_length;
- if (payload_length > 0)
- p.payload_length = payload_length;
- else
- p.skip = true;
- err = fw_iso_context_queue(s->context, &p, &s->buffer.iso_buffer,
+ err = fw_iso_context_queue(s->context, params, &s->buffer.iso_buffer,
s->buffer.packets[s->packet_index].offset);
if (err < 0) {
dev_err(&s->unit->device, "queueing error: %d\n", err);
}
static inline int queue_out_packet(struct amdtp_stream *s,
- unsigned int payload_length)
+ struct fw_iso_packet *params)
{
- return queue_packet(s, OUT_PACKET_HEADER_SIZE, payload_length);
+ params->skip =
+ !!(params->header_length == 0 && params->payload_length == 0);
+ return queue_packet(s, params);
}
-static inline int queue_in_packet(struct amdtp_stream *s)
+static inline int queue_in_packet(struct amdtp_stream *s,
+ struct fw_iso_packet *params)
{
- return queue_packet(s, IR_HEADER_SIZE, s->max_payload_length);
+ // Queue one packet for IR context.
+ params->header_length = s->ctx_data.tx.ctx_header_size;
+ params->payload_length = s->ctx_data.tx.max_ctx_payload_length;
+ params->skip = false;
+ return queue_packet(s, params);
}
-static int handle_out_packet(struct amdtp_stream *s,
- unsigned int payload_length, unsigned int cycle,
- unsigned int index)
+static void generate_cip_header(struct amdtp_stream *s, __be32 cip_header[2],
+ unsigned int syt)
{
- __be32 *buffer;
- unsigned int syt;
- unsigned int data_blocks;
- unsigned int pcm_frames;
- struct snd_pcm_substream *pcm;
-
- buffer = s->buffer.packets[s->packet_index].buffer;
- syt = calculate_syt(s, cycle);
- data_blocks = calculate_data_blocks(s, syt);
- pcm_frames = s->process_data_blocks(s, buffer + 2, data_blocks, &syt);
-
- if (s->flags & CIP_DBC_IS_END_EVENT)
- s->data_block_counter =
- (s->data_block_counter + data_blocks) & 0xff;
-
- buffer[0] = cpu_to_be32(READ_ONCE(s->source_node_id_field) |
+ cip_header[0] = cpu_to_be32(READ_ONCE(s->source_node_id_field) |
(s->data_block_quadlets << CIP_DBS_SHIFT) |
((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));
-
- if (!(s->flags & CIP_DBC_IS_END_EVENT))
- s->data_block_counter =
- (s->data_block_counter + data_blocks) & 0xff;
- payload_length = 8 + data_blocks * 4 * s->data_block_quadlets;
-
- trace_out_packet(s, cycle, buffer, payload_length, index);
-
- if (queue_out_packet(s, payload_length) < 0)
- return -EIO;
-
- pcm = READ_ONCE(s->pcm);
- if (pcm && pcm_frames > 0)
- update_pcm_pointers(s, pcm, pcm_frames);
-
- /* No need to return the number of handled data blocks. */
- return 0;
+ cip_header[1] = cpu_to_be32(CIP_EOH |
+ ((s->fmt << CIP_FMT_SHIFT) & CIP_FMT_MASK) |
+ ((s->ctx_data.rx.fdf << CIP_FDF_SHIFT) & CIP_FDF_MASK) |
+ (syt & CIP_SYT_MASK));
}
-static int handle_out_packet_without_header(struct amdtp_stream *s,
- unsigned int payload_length, unsigned int cycle,
- unsigned int index)
+static void build_it_pkt_header(struct amdtp_stream *s, unsigned int cycle,
+ struct fw_iso_packet *params,
+ unsigned int data_blocks, unsigned int syt,
+ unsigned int index)
{
- __be32 *buffer;
- unsigned int syt;
- unsigned int data_blocks;
- unsigned int pcm_frames;
- struct snd_pcm_substream *pcm;
-
- buffer = s->buffer.packets[s->packet_index].buffer;
- syt = calculate_syt(s, cycle);
- data_blocks = calculate_data_blocks(s, syt);
- pcm_frames = s->process_data_blocks(s, buffer, data_blocks, &syt);
- s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff;
+ __be32 *cip_header;
- payload_length = data_blocks * 4 * s->data_block_quadlets;
+ if (s->flags & CIP_DBC_IS_END_EVENT) {
+ s->data_block_counter =
+ (s->data_block_counter + data_blocks) & 0xff;
+ }
- trace_out_packet_without_header(s, cycle, payload_length, data_blocks,
- index);
+ if (!(s->flags & CIP_NO_HEADER)) {
+ cip_header = (__be32 *)params->header;
+ generate_cip_header(s, cip_header, syt);
+ params->header_length = 2 * sizeof(__be32);
+ } else {
+ cip_header = NULL;
+ }
- if (queue_out_packet(s, payload_length) < 0)
- return -EIO;
+ if (!(s->flags & CIP_DBC_IS_END_EVENT)) {
+ s->data_block_counter =
+ (s->data_block_counter + data_blocks) & 0xff;
+ }
- pcm = READ_ONCE(s->pcm);
- if (pcm && pcm_frames > 0)
- update_pcm_pointers(s, pcm, pcm_frames);
+ params->payload_length =
+ data_blocks * sizeof(__be32) * s->data_block_quadlets;
- /* No need to return the number of handled data blocks. */
- return 0;
+ trace_amdtp_packet(s, cycle, cip_header, params->payload_length,
+ data_blocks, index);
}
-static int handle_in_packet(struct amdtp_stream *s,
- unsigned int payload_length, unsigned int cycle,
- unsigned int index)
+static int check_cip_header(struct amdtp_stream *s, const __be32 *buf,
+ unsigned int payload_length,
+ unsigned int *data_blocks, unsigned int *dbc,
+ unsigned int *syt)
{
- __be32 *buffer;
u32 cip_header[2];
- unsigned int sph, fmt, fdf, syt;
- unsigned int data_block_quadlets, data_block_counter, dbc_interval;
- unsigned int data_blocks;
- struct snd_pcm_substream *pcm;
- unsigned int pcm_frames;
+ unsigned int sph;
+ unsigned int fmt;
+ unsigned int fdf;
bool lost;
- buffer = s->buffer.packets[s->packet_index].buffer;
- cip_header[0] = be32_to_cpu(buffer[0]);
- cip_header[1] = be32_to_cpu(buffer[1]);
-
- trace_in_packet(s, cycle, cip_header, payload_length, index);
+ cip_header[0] = be32_to_cpu(buf[0]);
+ cip_header[1] = be32_to_cpu(buf[1]);
/*
* This module supports 'Two-quadlet CIP header with SYT field'.
dev_info_ratelimited(&s->unit->device,
"Invalid CIP header for AMDTP: %08X:%08X\n",
cip_header[0], cip_header[1]);
- data_blocks = 0;
- pcm_frames = 0;
- goto end;
+ return -EAGAIN;
}
/* Check valid protocol or not. */
dev_info_ratelimited(&s->unit->device,
"Detect unexpected protocol: %08x %08x\n",
cip_header[0], cip_header[1]);
- data_blocks = 0;
- pcm_frames = 0;
- goto end;
+ return -EAGAIN;
}
/* Calculate data blocks */
fdf = (cip_header[1] & CIP_FDF_MASK) >> CIP_FDF_SHIFT;
- if (payload_length < 12 ||
+ if (payload_length < sizeof(__be32) * 2 ||
(fmt == CIP_FMT_AM && fdf == AMDTP_FDF_NO_DATA)) {
- data_blocks = 0;
+ *data_blocks = 0;
} else {
- data_block_quadlets =
- (cip_header[0] & CIP_DBS_MASK) >> CIP_DBS_SHIFT;
+ unsigned int data_block_quadlets =
+ (cip_header[0] & CIP_DBS_MASK) >> CIP_DBS_SHIFT;
/* avoid division by zero */
if (data_block_quadlets == 0) {
dev_err(&s->unit->device,
if (s->flags & CIP_WRONG_DBS)
data_block_quadlets = s->data_block_quadlets;
- data_blocks = (payload_length / 4 - 2) /
+ *data_blocks = (payload_length / sizeof(__be32) - 2) /
data_block_quadlets;
}
/* Check data block counter continuity */
- data_block_counter = cip_header[0] & CIP_DBC_MASK;
- if (data_blocks == 0 && (s->flags & CIP_EMPTY_HAS_WRONG_DBC) &&
+ *dbc = 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;
+ *dbc = s->data_block_counter;
if (((s->flags & CIP_SKIP_DBC_ZERO_CHECK) &&
- data_block_counter == s->tx_first_dbc) ||
+ *dbc == 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;
+ lost = *dbc != s->data_block_counter;
} else {
- if (data_blocks > 0 && s->tx_dbc_interval > 0)
- dbc_interval = s->tx_dbc_interval;
+ unsigned int 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;
+ dbc_interval = *data_blocks;
- lost = data_block_counter !=
- ((s->data_block_counter + dbc_interval) & 0xff);
+ lost = *dbc != ((s->data_block_counter + dbc_interval) & 0xff);
}
if (lost) {
dev_err(&s->unit->device,
"Detect discontinuity of CIP: %02X %02X\n",
- s->data_block_counter, data_block_counter);
+ s->data_block_counter, *dbc);
return -EIO;
}
- syt = be32_to_cpu(buffer[1]) & CIP_SYT_MASK;
- pcm_frames = s->process_data_blocks(s, buffer + 2, data_blocks, &syt);
-
- if (s->flags & CIP_DBC_IS_END_EVENT)
- s->data_block_counter = data_block_counter;
- else
- s->data_block_counter =
- (data_block_counter + data_blocks) & 0xff;
-end:
- if (queue_in_packet(s) < 0)
- return -EIO;
-
- pcm = READ_ONCE(s->pcm);
- if (pcm && pcm_frames > 0)
- update_pcm_pointers(s, pcm, pcm_frames);
+ *syt = cip_header[1] & CIP_SYT_MASK;
return 0;
}
-static int handle_in_packet_without_header(struct amdtp_stream *s,
- unsigned int payload_length, unsigned int cycle,
- unsigned int index)
+static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,
+ const __be32 *ctx_header,
+ unsigned int *payload_length,
+ unsigned int *data_blocks, unsigned int *dbc,
+ unsigned int *syt, unsigned int index)
{
- __be32 *buffer;
- unsigned int payload_quadlets;
- unsigned int data_blocks;
- struct snd_pcm_substream *pcm;
- unsigned int pcm_frames;
+ const __be32 *cip_header;
+ int err;
- buffer = s->buffer.packets[s->packet_index].buffer;
- payload_quadlets = payload_length / 4;
- data_blocks = payload_quadlets / s->data_block_quadlets;
+ *payload_length = be32_to_cpu(ctx_header[0]) >> ISO_DATA_LENGTH_SHIFT;
+ if (*payload_length > s->ctx_data.tx.ctx_header_size +
+ s->ctx_data.tx.max_ctx_payload_length) {
+ dev_err(&s->unit->device,
+ "Detect jumbo payload: %04x %04x\n",
+ *payload_length, s->ctx_data.tx.max_ctx_payload_length);
+ return -EIO;
+ }
- trace_in_packet_without_header(s, cycle, payload_quadlets, data_blocks,
- index);
+ if (!(s->flags & CIP_NO_HEADER)) {
+ cip_header = ctx_header + 2;
+ err = check_cip_header(s, cip_header, *payload_length,
+ data_blocks, dbc, syt);
+ if (err < 0) {
+ if (err != -EAGAIN)
+ return err;
- pcm_frames = s->process_data_blocks(s, buffer, data_blocks, NULL);
- s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff;
+ *data_blocks = 0;
+ }
+ } else {
+ cip_header = NULL;
+ err = 0;
+ *data_blocks = *payload_length / sizeof(__be32) /
+ s->data_block_quadlets;
+ *dbc = s->data_block_counter;
+ *syt = 0;
+ }
- if (queue_in_packet(s) < 0)
- return -EIO;
+ if (err >= 0 && s->flags & CIP_DBC_IS_END_EVENT)
+ s->data_block_counter = *dbc;
- pcm = READ_ONCE(s->pcm);
- if (pcm && pcm_frames > 0)
- update_pcm_pointers(s, pcm, pcm_frames);
+ trace_amdtp_packet(s, cycle, cip_header, *payload_length, *data_blocks,
+ index);
- return 0;
+ return err;
}
-/*
- * In CYCLE_TIMER register of IEEE 1394, 7 bits are used to represent second. On
- * the other hand, in DMA descriptors of 1394 OHCI, 3 bits are used to represent
- * it. Thus, via Linux firewire subsystem, we can get the 3 bits for second.
- */
-static inline u32 compute_cycle_count(u32 tstamp)
+// In CYCLE_TIMER register of IEEE 1394, 7 bits are used to represent second. On
+// the other hand, in DMA descriptors of 1394 OHCI, 3 bits are used to represent
+// it. Thus, via Linux firewire subsystem, we can get the 3 bits for second.
+static inline u32 compute_cycle_count(__be32 ctx_header_tstamp)
{
+ u32 tstamp = be32_to_cpu(ctx_header_tstamp) & HEADER_TSTAMP_MASK;
return (((tstamp >> 13) & 0x07) * 8000) + (tstamp & 0x1fff);
}
return cycle;
}
+// Align to actual cycle count for the packet which is going to be scheduled.
+// This module queued the same number of isochronous cycle as QUEUE_LENGTH to
+// skip isochronous cycle, therefore it's OK to just increment the cycle by
+// QUEUE_LENGTH for scheduled cycle.
+static inline u32 compute_it_cycle(const __be32 ctx_header_tstamp)
+{
+ u32 cycle = compute_cycle_count(ctx_header_tstamp);
+ return increment_cycle_count(cycle, QUEUE_LENGTH);
+}
+
+static inline void cancel_stream(struct amdtp_stream *s)
+{
+ s->packet_index = -1;
+ if (in_interrupt())
+ amdtp_stream_pcm_abort(s);
+ WRITE_ONCE(s->pcm_buffer_pointer, SNDRV_PCM_POS_XRUN);
+}
+
static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
size_t header_length, void *header,
void *private_data)
{
struct amdtp_stream *s = private_data;
- unsigned int i, packets = header_length / 4;
- u32 cycle;
+ const __be32 *ctx_header = header;
+ unsigned int i, packets = header_length / sizeof(*ctx_header);
if (s->packet_index < 0)
return;
- cycle = compute_cycle_count(tstamp);
-
- /* Align to actual cycle count for the last packet. */
- cycle = increment_cycle_count(cycle, QUEUE_LENGTH - packets);
-
for (i = 0; i < packets; ++i) {
- cycle = increment_cycle_count(cycle, 1);
- if (s->handle_packet(s, 0, cycle, i) < 0) {
- s->packet_index = -1;
- if (in_interrupt())
- amdtp_stream_pcm_abort(s);
- WRITE_ONCE(s->pcm_buffer_pointer, SNDRV_PCM_POS_XRUN);
+ u32 cycle;
+ unsigned int syt;
+ unsigned int data_block;
+ __be32 *buffer;
+ unsigned int pcm_frames;
+ struct {
+ struct fw_iso_packet params;
+ __be32 header[IT_PKT_HEADER_SIZE_CIP / sizeof(__be32)];
+ } template = { {0}, {0} };
+ struct snd_pcm_substream *pcm;
+
+ cycle = compute_it_cycle(*ctx_header);
+ syt = calculate_syt(s, cycle);
+ data_block = calculate_data_blocks(s, syt);
+ buffer = s->buffer.packets[s->packet_index].buffer;
+ pcm_frames = s->process_data_blocks(s, buffer, data_block, &syt);
+
+ build_it_pkt_header(s, cycle, &template.params, data_block, syt,
+ i);
+
+ if (queue_out_packet(s, &template.params) < 0) {
+ cancel_stream(s);
return;
}
+
+ pcm = READ_ONCE(s->pcm);
+ if (pcm && pcm_frames > 0)
+ update_pcm_pointers(s, pcm, pcm_frames);
+
+ ++ctx_header;
}
fw_iso_context_queue_flush(s->context);
{
struct amdtp_stream *s = private_data;
unsigned int i, packets;
- unsigned int payload_length, max_payload_length;
__be32 *ctx_header = header;
if (s->packet_index < 0)
return;
- /* The number of packets in buffer */
- packets = header_length / IR_HEADER_SIZE;
-
- /* For buffer-over-run prevention. */
- max_payload_length = s->max_payload_length;
+ // The number of packets in buffer.
+ packets = header_length / s->ctx_data.tx.ctx_header_size;
for (i = 0; i < packets; i++) {
- u32 iso_header = be32_to_cpu(ctx_header[0]);
- unsigned int cycle;
+ u32 cycle;
+ unsigned int payload_length;
+ unsigned int data_blocks;
+ unsigned int dbc;
+ unsigned int syt;
+ __be32 *buffer;
+ unsigned int pcm_frames = 0;
+ struct fw_iso_packet params = {0};
+ struct snd_pcm_substream *pcm;
+ int err;
+
+ cycle = compute_cycle_count(ctx_header[1]);
+ err = parse_ir_ctx_header(s, cycle, ctx_header, &payload_length,
+ &data_blocks, &dbc, &syt, i);
+ if (err < 0 && err != -EAGAIN)
+ break;
- tstamp = be32_to_cpu(ctx_header[1]) & HEADER_TSTAMP_MASK;
- cycle = compute_cycle_count(tstamp);
+ if (err >= 0) {
+ buffer = s->buffer.packets[s->packet_index].buffer;
+ pcm_frames = s->process_data_blocks(s, buffer,
+ data_blocks, &syt);
- /* The number of bytes in this packet */
- payload_length = iso_header >> ISO_DATA_LENGTH_SHIFT;
- if (payload_length > max_payload_length) {
- dev_err(&s->unit->device,
- "Detect jumbo payload: %04x %04x\n",
- payload_length, max_payload_length);
- break;
+ if (!(s->flags & CIP_DBC_IS_END_EVENT)) {
+ s->data_block_counter =
+ (dbc + data_blocks) & 0xff;
+ }
}
- if (s->handle_packet(s, payload_length, cycle, i) < 0)
+ if (queue_in_packet(s, ¶ms) < 0)
break;
- ctx_header += IR_HEADER_SIZE / sizeof(__be32);
+ pcm = READ_ONCE(s->pcm);
+ if (pcm && pcm_frames > 0)
+ update_pcm_pointers(s, pcm, pcm_frames);
+
+ ctx_header += s->ctx_data.tx.ctx_header_size / sizeof(*ctx_header);
}
/* Queueing error or detecting invalid payload. */
if (i < packets) {
- s->packet_index = -1;
- if (in_interrupt())
- amdtp_stream_pcm_abort(s);
- WRITE_ONCE(s->pcm_buffer_pointer, SNDRV_PCM_POS_XRUN);
+ cancel_stream(s);
return;
}
void *header, void *private_data)
{
struct amdtp_stream *s = private_data;
- __be32 *ctx_header = header;
+ const __be32 *ctx_header = header;
u32 cycle;
- unsigned int packets;
/*
* For in-stream, first packet has come.
wake_up(&s->callback_wait);
if (s->direction == AMDTP_IN_STREAM) {
- tstamp = be32_to_cpu(ctx_header[1]) & HEADER_TSTAMP_MASK;
- cycle = compute_cycle_count(tstamp);
+ cycle = compute_cycle_count(ctx_header[1]);
context->callback.sc = in_stream_callback;
- if (s->flags & CIP_NO_HEADER)
- s->handle_packet = handle_in_packet_without_header;
- else
- s->handle_packet = handle_in_packet;
} else {
- packets = header_length / 4;
- cycle = compute_cycle_count(tstamp);
- cycle = increment_cycle_count(cycle, QUEUE_LENGTH - packets);
+ cycle = compute_it_cycle(*ctx_header);
+
context->callback.sc = out_stream_callback;
- if (s->flags & CIP_NO_HEADER)
- s->handle_packet = handle_out_packet_without_header;
- else
- s->handle_packet = handle_out_packet;
}
s->start_cycle = cycle;
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 },
[CIP_SFC_88200] = { 0, 67 },
[CIP_SFC_176400] = { 0, 67 },
};
- unsigned int header_size;
+ unsigned int ctx_header_size;
+ unsigned int max_ctx_payload_size;
enum dma_data_direction dir;
int type, tag, err;
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;
+ if (!(s->flags & CIP_NO_HEADER))
+ ctx_header_size = IR_CTX_HEADER_SIZE_CIP;
+ else
+ ctx_header_size = IR_CTX_HEADER_SIZE_NO_CIP;
+
+ max_ctx_payload_size = amdtp_stream_get_max_payload(s) -
+ ctx_header_size;
} else {
dir = DMA_TO_DEVICE;
type = FW_ISO_CONTEXT_TRANSMIT;
- header_size = OUT_PACKET_HEADER_SIZE;
+ ctx_header_size = 0; // No effect for IT context.
+
+ max_ctx_payload_size = amdtp_stream_get_max_payload(s);
+ if (!(s->flags & CIP_NO_HEADER))
+ max_ctx_payload_size -= IT_PKT_HEADER_SIZE_CIP;
}
+
err = iso_packets_buffer_init(&s->buffer, s->unit, QUEUE_LENGTH,
- amdtp_stream_get_max_payload(s), dir);
+ max_ctx_payload_size, dir);
if (err < 0)
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)
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_ctx_payload_length = max_ctx_payload_size;
+ s->ctx_data.tx.ctx_header_size = ctx_header_size;
+ }
if (s->flags & CIP_NO_HEADER)
s->tag = TAG_NO_CIP_HEADER;
s->packet_index = 0;
do {
- if (s->direction == AMDTP_IN_STREAM)
- err = queue_in_packet(s);
- else
- err = queue_out_packet(s, 0);
+ struct fw_iso_packet params;
+ if (s->direction == AMDTP_IN_STREAM) {
+ err = queue_in_packet(s, ¶ms);
+ } else {
+ params.header_length = 0;
+ params.payload_length = 0;
+ err = queue_out_packet(s, ¶ms);
+ }
if (err < 0)
goto err_context;
} while (s->packet_index > 0);
projects / linux-2.6-microblaze.git / blobdiff