ALSA: firewire-lib: Split some codes into functions to reuse for both streams
Some codes can be reused to handle in-stream. This commit adds new functions. This commit also renames some functions to keep naming consistency. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto
Takashi Iwai
parent
3ff7e8f0d4
commit
4b7da117e5
|
|
@ -47,6 +47,8 @@
|
|||
#define INTERRUPT_INTERVAL 16
|
||||
#define QUEUE_LENGTH 48
|
||||
|
||||
#define OUT_PACKET_HEADER_SIZE 0
|
||||
|
||||
static void pcm_period_tasklet(unsigned long data);
|
||||
|
||||
/**
|
||||
|
|
@ -440,13 +442,73 @@ static void amdtp_fill_midi(struct amdtp_stream *s,
|
|||
cpu_to_be32(0x80000000);
|
||||
}
|
||||
|
||||
static void queue_out_packet(struct amdtp_stream *s, unsigned int cycle)
|
||||
static void update_pcm_pointers(struct amdtp_stream *s,
|
||||
struct snd_pcm_substream *pcm,
|
||||
unsigned int frames)
|
||||
{ unsigned int ptr;
|
||||
|
||||
if (s->dual_wire)
|
||||
frames *= 2;
|
||||
|
||||
ptr = s->pcm_buffer_pointer + frames;
|
||||
if (ptr >= pcm->runtime->buffer_size)
|
||||
ptr -= pcm->runtime->buffer_size;
|
||||
ACCESS_ONCE(s->pcm_buffer_pointer) = ptr;
|
||||
|
||||
s->pcm_period_pointer += frames;
|
||||
if (s->pcm_period_pointer >= pcm->runtime->period_size) {
|
||||
s->pcm_period_pointer -= pcm->runtime->period_size;
|
||||
s->pointer_flush = false;
|
||||
tasklet_hi_schedule(&s->period_tasklet);
|
||||
}
|
||||
}
|
||||
|
||||
static void pcm_period_tasklet(unsigned long data)
|
||||
{
|
||||
struct amdtp_stream *s = (void *)data;
|
||||
struct snd_pcm_substream *pcm = ACCESS_ONCE(s->pcm);
|
||||
|
||||
if (pcm)
|
||||
snd_pcm_period_elapsed(pcm);
|
||||
}
|
||||
|
||||
static int queue_packet(struct amdtp_stream *s,
|
||||
unsigned int header_length,
|
||||
unsigned int payload_length, bool skip)
|
||||
{
|
||||
struct fw_iso_packet p = {0};
|
||||
int err;
|
||||
|
||||
p.interrupt = IS_ALIGNED(s->packet_index + 1, INTERRUPT_INTERVAL);
|
||||
p.tag = TAG_CIP;
|
||||
p.header_length = header_length;
|
||||
p.payload_length = (!skip) ? payload_length : 0;
|
||||
p.skip = skip;
|
||||
err = fw_iso_context_queue(s->context, &p, &s->buffer.iso_buffer,
|
||||
s->buffer.packets[s->packet_index].offset);
|
||||
if (err < 0) {
|
||||
dev_err(&s->unit->device, "queueing error: %d\n", err);
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (++s->packet_index >= QUEUE_LENGTH)
|
||||
s->packet_index = 0;
|
||||
end:
|
||||
return err;
|
||||
}
|
||||
|
||||
static inline int queue_out_packet(struct amdtp_stream *s,
|
||||
unsigned int payload_length, bool skip)
|
||||
{
|
||||
return queue_packet(s, OUT_PACKET_HEADER_SIZE,
|
||||
payload_length, skip);
|
||||
}
|
||||
|
||||
static void handle_out_packet(struct amdtp_stream *s, unsigned int cycle)
|
||||
{
|
||||
__be32 *buffer;
|
||||
unsigned int index, data_blocks, syt, ptr;
|
||||
unsigned int index, data_blocks, syt, payload_length;
|
||||
struct snd_pcm_substream *pcm;
|
||||
struct fw_iso_packet packet;
|
||||
int err;
|
||||
|
||||
if (s->packet_index < 0)
|
||||
return;
|
||||
|
|
@ -479,55 +541,20 @@ static void queue_out_packet(struct amdtp_stream *s, unsigned int cycle)
|
|||
|
||||
s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff;
|
||||
|
||||
packet.payload_length = 8 + data_blocks * 4 * s->data_block_quadlets;
|
||||
packet.interrupt = IS_ALIGNED(index + 1, INTERRUPT_INTERVAL);
|
||||
packet.skip = 0;
|
||||
packet.tag = TAG_CIP;
|
||||
packet.sy = 0;
|
||||
packet.header_length = 0;
|
||||
|
||||
err = fw_iso_context_queue(s->context, &packet, &s->buffer.iso_buffer,
|
||||
s->buffer.packets[index].offset);
|
||||
if (err < 0) {
|
||||
dev_err(&s->unit->device, "queueing error: %d\n", err);
|
||||
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 (++index >= QUEUE_LENGTH)
|
||||
index = 0;
|
||||
s->packet_index = index;
|
||||
|
||||
if (pcm) {
|
||||
if (s->dual_wire)
|
||||
data_blocks *= 2;
|
||||
|
||||
ptr = s->pcm_buffer_pointer + data_blocks;
|
||||
if (ptr >= pcm->runtime->buffer_size)
|
||||
ptr -= pcm->runtime->buffer_size;
|
||||
ACCESS_ONCE(s->pcm_buffer_pointer) = ptr;
|
||||
|
||||
s->pcm_period_pointer += data_blocks;
|
||||
if (s->pcm_period_pointer >= pcm->runtime->period_size) {
|
||||
s->pcm_period_pointer -= pcm->runtime->period_size;
|
||||
s->pointer_flush = false;
|
||||
tasklet_hi_schedule(&s->period_tasklet);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void pcm_period_tasklet(unsigned long data)
|
||||
{
|
||||
struct amdtp_stream *s = (void *)data;
|
||||
struct snd_pcm_substream *pcm = ACCESS_ONCE(s->pcm);
|
||||
|
||||
if (pcm)
|
||||
snd_pcm_period_elapsed(pcm);
|
||||
update_pcm_pointers(s, pcm, data_blocks);
|
||||
}
|
||||
|
||||
static void out_packet_callback(struct fw_iso_context *context, u32 cycle,
|
||||
size_t header_length, void *header, void *private_data)
|
||||
static void out_stream_callback(struct fw_iso_context *context, u32 cycle,
|
||||
size_t header_length, void *header,
|
||||
void *private_data)
|
||||
{
|
||||
struct amdtp_stream *s = private_data;
|
||||
unsigned int i, packets = header_length / 4;
|
||||
|
|
@ -540,31 +567,10 @@ static void out_packet_callback(struct fw_iso_context *context, u32 cycle,
|
|||
cycle += QUEUE_LENGTH - packets;
|
||||
|
||||
for (i = 0; i < packets; ++i)
|
||||
queue_out_packet(s, ++cycle);
|
||||
handle_out_packet(s, ++cycle);
|
||||
fw_iso_context_queue_flush(s->context);
|
||||
}
|
||||
|
||||
static int queue_initial_skip_packets(struct amdtp_stream *s)
|
||||
{
|
||||
struct fw_iso_packet skip_packet = {
|
||||
.skip = 1,
|
||||
};
|
||||
unsigned int i;
|
||||
int err;
|
||||
|
||||
for (i = 0; i < QUEUE_LENGTH; ++i) {
|
||||
skip_packet.interrupt = IS_ALIGNED(s->packet_index + 1,
|
||||
INTERRUPT_INTERVAL);
|
||||
err = fw_iso_context_queue(s->context, &skip_packet, NULL, 0);
|
||||
if (err < 0)
|
||||
return err;
|
||||
if (++s->packet_index >= QUEUE_LENGTH)
|
||||
s->packet_index = 0;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* amdtp_stream_start - start transferring packets
|
||||
* @s: the AMDTP stream to start
|
||||
|
|
@ -594,11 +600,12 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed)
|
|||
mutex_lock(&s->mutex);
|
||||
|
||||
if (WARN_ON(amdtp_stream_running(s) ||
|
||||
(!s->pcm_channels && !s->midi_ports))) {
|
||||
(s->data_block_quadlets < 1))) {
|
||||
err = -EBADFD;
|
||||
goto err_unlock;
|
||||
}
|
||||
|
||||
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;
|
||||
|
|
@ -612,7 +619,7 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed)
|
|||
s->context = fw_iso_context_create(fw_parent_device(s->unit)->card,
|
||||
FW_ISO_CONTEXT_TRANSMIT,
|
||||
channel, speed, 0,
|
||||
out_packet_callback, s);
|
||||
out_stream_callback, s);
|
||||
if (IS_ERR(s->context)) {
|
||||
err = PTR_ERR(s->context);
|
||||
if (err == -EBUSY)
|
||||
|
|
@ -624,10 +631,11 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed)
|
|||
amdtp_stream_update(s);
|
||||
|
||||
s->packet_index = 0;
|
||||
s->data_block_counter = 0;
|
||||
err = queue_initial_skip_packets(s);
|
||||
if (err < 0)
|
||||
goto err_context;
|
||||
do {
|
||||
err = queue_out_packet(s, 0, true);
|
||||
if (err < 0)
|
||||
goto err_context;
|
||||
} while (s->packet_index > 0);
|
||||
|
||||
err = fw_iso_context_start(s->context, -1, 0, 0);
|
||||
if (err < 0)
|
||||
|
|
|
|||
Loading…
Reference in New Issue