#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
*/
unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s)
{
- return 8 + s->syt_interval * s->data_block_quadlets * 4;
+ unsigned int multiplier = 1;
+
+ if (s->flags & CIP_JUMBO_PAYLOAD)
+ multiplier = 5;
+
+ return 8 + s->syt_interval * s->data_block_quadlets * 4 * multiplier;
}
EXPORT_SYMBOL(amdtp_stream_get_max_payload);
-static void amdtp_write_s16(struct amdtp_stream *s,
- struct snd_pcm_substream *pcm,
- __be32 *buffer, unsigned int frames);
-static void amdtp_write_s32(struct amdtp_stream *s,
- struct snd_pcm_substream *pcm,
- __be32 *buffer, unsigned int frames);
-static void amdtp_read_s32(struct amdtp_stream *s,
- struct snd_pcm_substream *pcm,
- __be32 *buffer, unsigned int frames);
+static void write_pcm_s16(struct amdtp_stream *s,
+ struct snd_pcm_substream *pcm,
+ __be32 *buffer, unsigned int frames);
+static void write_pcm_s32(struct amdtp_stream *s,
+ struct snd_pcm_substream *pcm,
+ __be32 *buffer, unsigned int frames);
+static void read_pcm_s32(struct amdtp_stream *s,
+ struct snd_pcm_substream *pcm,
+ __be32 *buffer, unsigned int frames);
/**
* amdtp_stream_set_pcm_format - set the PCM format
/* fall through */
case SNDRV_PCM_FORMAT_S16:
if (s->direction == AMDTP_OUT_STREAM) {
- s->transfer_samples = amdtp_write_s16;
+ s->transfer_samples = write_pcm_s16;
break;
}
WARN_ON(1);
/* fall through */
case SNDRV_PCM_FORMAT_S32:
if (s->direction == AMDTP_OUT_STREAM)
- s->transfer_samples = amdtp_write_s32;
+ s->transfer_samples = write_pcm_s32;
else
- s->transfer_samples = amdtp_read_s32;
+ s->transfer_samples = read_pcm_s32;
break;
}
}
}
EXPORT_SYMBOL(amdtp_stream_pcm_prepare);
-static unsigned int calculate_data_blocks(struct amdtp_stream *s)
+static unsigned int calculate_data_blocks(struct amdtp_stream *s,
+ unsigned int syt)
{
unsigned int phase, data_blocks;
- if (s->flags & CIP_BLOCKING)
- data_blocks = s->syt_interval;
- else if (!cip_sfc_is_base_44100(s->sfc)) {
- /* Sample_rate / 8000 is an integer, and precomputed. */
- data_blocks = s->data_block_state;
+ /* Blocking mode. */
+ if (s->flags & CIP_BLOCKING) {
+ /* This module generate empty packet for 'no data'. */
+ if (syt == CIP_SYT_NO_INFO)
+ data_blocks = 0;
+ else
+ data_blocks = s->syt_interval;
+ /* Non-blocking mode. */
} else {
- phase = s->data_block_state;
+ if (!cip_sfc_is_base_44100(s->sfc)) {
+ /* Sample_rate / 8000 is an integer, and precomputed. */
+ data_blocks = s->data_block_state;
+ } else {
+ phase = s->data_block_state;
/*
* This calculates the number of data blocks per packet so that
* as possible in the sequence (to prevent underruns of the
* device's buffer).
*/
- if (s->sfc == CIP_SFC_44100)
- /* 6 6 5 6 5 6 5 ... */
- data_blocks = 5 + ((phase & 1) ^
- (phase == 0 || phase >= 40));
- else
- /* 12 11 11 11 11 ... or 23 22 22 22 22 ... */
- data_blocks = 11 * (s->sfc >> 1) + (phase == 0);
- if (++phase >= (80 >> (s->sfc >> 1)))
- phase = 0;
- s->data_block_state = phase;
+ if (s->sfc == CIP_SFC_44100)
+ /* 6 6 5 6 5 6 5 ... */
+ data_blocks = 5 + ((phase & 1) ^
+ (phase == 0 || phase >= 40));
+ else
+ /* 12 11 11 11 11 ... or 23 22 22 22 22 ... */
+ data_blocks = 11 * (s->sfc >> 1) + (phase == 0);
+ if (++phase >= (80 >> (s->sfc >> 1)))
+ phase = 0;
+ s->data_block_state = phase;
+ }
}
return data_blocks;
}
}
-static void amdtp_write_s32(struct amdtp_stream *s,
- struct snd_pcm_substream *pcm,
- __be32 *buffer, unsigned int frames)
+static void write_pcm_s32(struct amdtp_stream *s,
+ struct snd_pcm_substream *pcm,
+ __be32 *buffer, unsigned int frames)
{
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int channels, remaining_frames, i, c;
}
}
-static void amdtp_write_s16(struct amdtp_stream *s,
- struct snd_pcm_substream *pcm,
- __be32 *buffer, unsigned int frames)
+static void write_pcm_s16(struct amdtp_stream *s,
+ struct snd_pcm_substream *pcm,
+ __be32 *buffer, unsigned int frames)
{
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int channels, remaining_frames, i, c;
}
}
-static void amdtp_read_s32(struct amdtp_stream *s,
- struct snd_pcm_substream *pcm,
- __be32 *buffer, unsigned int frames)
+static void read_pcm_s32(struct amdtp_stream *s,
+ struct snd_pcm_substream *pcm,
+ __be32 *buffer, unsigned int frames)
{
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int channels, remaining_frames, i, c;
}
}
-static void amdtp_fill_pcm_silence(struct amdtp_stream *s,
- __be32 *buffer, unsigned int frames)
+static void write_pcm_silence(struct amdtp_stream *s,
+ __be32 *buffer, unsigned int frames)
{
unsigned int i, c;
s->midi_fifo_used[port] += amdtp_rate_table[s->sfc];
}
-static void amdtp_fill_midi(struct amdtp_stream *s,
- __be32 *buffer, unsigned int frames)
+static void write_midi_messages(struct amdtp_stream *s,
+ __be32 *buffer, unsigned int frames)
{
unsigned int f, port;
u8 *b;
}
}
-static void amdtp_pull_midi(struct amdtp_stream *s,
- __be32 *buffer, unsigned int frames)
+static void read_midi_messages(struct amdtp_stream *s,
+ __be32 *buffer, unsigned int frames)
{
unsigned int f, port;
int len;
amdtp_stream_get_max_payload(s), false);
}
-static void handle_out_packet(struct amdtp_stream *s, unsigned int syt)
+static int handle_out_packet(struct amdtp_stream *s, unsigned int data_blocks,
+ unsigned int syt)
{
__be32 *buffer;
- unsigned int data_blocks, payload_length;
+ unsigned int payload_length;
struct snd_pcm_substream *pcm;
- if (s->packet_index < 0)
- return;
-
- /* this module generate empty packet for 'no data' */
- if (!(s->flags & CIP_BLOCKING) || (syt != CIP_SYT_NO_INFO))
- data_blocks = calculate_data_blocks(s);
- else
- data_blocks = 0;
-
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);
if (pcm)
s->transfer_samples(s, pcm, buffer, data_blocks);
else
- amdtp_fill_pcm_silence(s, buffer, data_blocks);
+ write_pcm_silence(s, buffer, data_blocks);
if (s->midi_ports)
- amdtp_fill_midi(s, buffer, data_blocks);
+ write_midi_messages(s, buffer, data_blocks);
s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff;
payload_length = 8 + data_blocks * 4 * s->data_block_quadlets;
- if (queue_out_packet(s, payload_length, false) < 0) {
- s->packet_index = -1;
- amdtp_stream_pcm_abort(s);
- return;
- }
+ if (queue_out_packet(s, payload_length, false) < 0)
+ return -EIO;
if (pcm)
update_pcm_pointers(s, pcm, data_blocks);
+
+ /* No need to return the number of handled data blocks. */
+ return 0;
}
-static void handle_in_packet(struct amdtp_stream *s,
- unsigned int payload_quadlets,
- __be32 *buffer)
+static int handle_in_packet(struct amdtp_stream *s,
+ unsigned int payload_quadlets, __be32 *buffer,
+ unsigned int *data_blocks)
{
u32 cip_header[2];
- unsigned int data_blocks, data_block_quadlets, data_block_counter,
- dbc_interval;
+ unsigned int data_block_quadlets, data_block_counter, dbc_interval;
struct snd_pcm_substream *pcm = NULL;
bool lost;
dev_info_ratelimited(&s->unit->device,
"Invalid CIP header for AMDTP: %08X:%08X\n",
cip_header[0], cip_header[1]);
+ *data_blocks = 0;
goto end;
}
/* Calculate data blocks */
if (payload_quadlets < 3 ||
((cip_header[1] & CIP_FDF_MASK) ==
- (AMDTP_FDF_NO_DATA << CIP_FDF_SFC_SHIFT))) {
- data_blocks = 0;
+ (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,
+ dev_err(&s->unit->device,
"Detect invalid value in dbs field: %08X\n",
cip_header[0]);
- goto err;
+ return -EPROTO;
}
if (s->flags & CIP_WRONG_DBS)
data_block_quadlets = s->data_block_quadlets;
- data_blocks = (payload_quadlets - 2) / data_block_quadlets;
+ *data_blocks = (payload_quadlets - 2) / data_block_quadlets;
}
/* Check data block counter continuity */
- data_block_counter = cip_header[0] & AMDTP_DBC_MASK;
- if (data_blocks == 0 && (s->flags & CIP_EMPTY_HAS_WRONG_DBC) &&
+ 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;
} 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))
+ if ((*data_blocks > 0) && (s->tx_dbc_interval > 0))
dbc_interval = s->tx_dbc_interval;
else
- dbc_interval = data_blocks;
+ dbc_interval = *data_blocks;
lost = data_block_counter !=
((s->data_block_counter + dbc_interval) & 0xff);
}
if (lost) {
- dev_info(&s->unit->device,
- "Detect discontinuity of CIP: %02X %02X\n",
- s->data_block_counter, data_block_counter);
- goto err;
+ dev_err(&s->unit->device,
+ "Detect discontinuity of CIP: %02X %02X\n",
+ s->data_block_counter, data_block_counter);
+ return -EIO;
}
- if (data_blocks > 0) {
+ if (*data_blocks > 0) {
buffer += 2;
pcm = ACCESS_ONCE(s->pcm);
if (pcm)
- s->transfer_samples(s, pcm, buffer, data_blocks);
+ s->transfer_samples(s, pcm, buffer, *data_blocks);
if (s->midi_ports)
- amdtp_pull_midi(s, buffer, data_blocks);
+ read_midi_messages(s, buffer, *data_blocks);
}
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;
+ (data_block_counter + *data_blocks) & 0xff;
end:
if (queue_in_packet(s) < 0)
- goto err;
+ return -EIO;
if (pcm)
- update_pcm_pointers(s, pcm, data_blocks);
+ update_pcm_pointers(s, pcm, *data_blocks);
- return;
-err:
- s->packet_index = -1;
- amdtp_stream_pcm_abort(s);
+ return 0;
}
static void out_stream_callback(struct fw_iso_context *context, u32 cycle,
{
struct amdtp_stream *s = private_data;
unsigned int i, syt, packets = header_length / 4;
+ unsigned int data_blocks;
+
+ if (s->packet_index < 0)
+ return;
/*
* Compute the cycle of the last queued packet.
for (i = 0; i < packets; ++i) {
syt = calculate_syt(s, ++cycle);
- handle_out_packet(s, syt);
+ data_blocks = calculate_data_blocks(s, syt);
+
+ if (handle_out_packet(s, data_blocks, syt) < 0) {
+ s->packet_index = -1;
+ amdtp_stream_pcm_abort(s);
+ return;
+ }
}
+
fw_iso_context_queue_flush(s->context);
}
void *private_data)
{
struct amdtp_stream *s = private_data;
- unsigned int p, syt, packets, payload_quadlets;
+ unsigned int p, syt, packets;
+ unsigned int payload_quadlets, max_payload_quadlets;
+ unsigned int data_blocks;
__be32 *buffer, *headers = header;
+ if (s->packet_index < 0)
+ return;
+
/* The number of packets in buffer */
packets = header_length / IN_PACKET_HEADER_SIZE;
+ /* For buffer-over-run prevention. */
+ max_payload_quadlets = amdtp_stream_get_max_payload(s) / 4;
+
for (p = 0; p < packets; p++) {
- if (s->packet_index < 0)
+ buffer = s->buffer.packets[s->packet_index].buffer;
+
+ /* The number of quadlets in this packet */
+ payload_quadlets =
+ (be32_to_cpu(headers[p]) >> ISO_DATA_LENGTH_SHIFT) / 4;
+ if (payload_quadlets > max_payload_quadlets) {
+ dev_err(&s->unit->device,
+ "Detect jumbo payload: %02x %02x\n",
+ payload_quadlets, max_payload_quadlets);
+ s->packet_index = -1;
break;
+ }
- buffer = s->buffer.packets[s->packet_index].buffer;
+ if (handle_in_packet(s, payload_quadlets, buffer,
+ &data_blocks) < 0) {
+ s->packet_index = -1;
+ break;
+ }
/* Process sync slave stream */
if (s->sync_slave && s->sync_slave->callbacked) {
syt = be32_to_cpu(buffer[1]) & CIP_SYT_MASK;
- handle_out_packet(s->sync_slave, syt);
+ if (handle_out_packet(s->sync_slave,
+ data_blocks, syt) < 0) {
+ s->packet_index = -1;
+ break;
+ }
}
-
- /* The number of quadlets in this packet */
- payload_quadlets =
- (be32_to_cpu(headers[p]) >> ISO_DATA_LENGTH_SHIFT) / 4;
- handle_in_packet(s, payload_quadlets, buffer);
}
/* Queueing error or detecting discontinuity */
if (s->packet_index < 0) {
+ amdtp_stream_pcm_abort(s);
+
/* Abort sync slave. */
if (s->sync_slave) {
s->sync_slave->packet_index = -1;
if (s->direction == AMDTP_IN_STREAM)
context->callback.sc = in_stream_callback;
- else if ((s->flags & CIP_BLOCKING) && (s->flags & CIP_SYNC_TO_DEVICE))
+ else if (s->flags & CIP_SYNC_TO_DEVICE)
context->callback.sc = slave_stream_callback;
else
context->callback.sc = out_stream_callback;
*/
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);
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