mirror of https://gitee.com/openkylin/linux.git
150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED
|
|
#define SOUND_FIREWIRE_AMDTP_H_INCLUDED
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/mutex.h>
|
|
#include "packets-buffer.h"
|
|
|
|
/**
|
|
* enum cip_out_flags - describes details of the streaming protocol
|
|
* @CIP_NONBLOCKING: In non-blocking mode, each packet contains
|
|
* sample_rate/8000 samples, with rounding up or down to adjust
|
|
* for clock skew and left-over fractional samples. This should
|
|
* be used if supported by the device.
|
|
*/
|
|
enum cip_out_flags {
|
|
CIP_NONBLOCKING = 0,
|
|
};
|
|
|
|
/**
|
|
* enum cip_sfc - a stream's sample rate
|
|
*/
|
|
enum cip_sfc {
|
|
CIP_SFC_32000 = 0,
|
|
CIP_SFC_44100 = 1,
|
|
CIP_SFC_48000 = 2,
|
|
CIP_SFC_88200 = 3,
|
|
CIP_SFC_96000 = 4,
|
|
CIP_SFC_176400 = 5,
|
|
CIP_SFC_192000 = 6,
|
|
};
|
|
|
|
#define AMDTP_OUT_PCM_FORMAT_BITS (SNDRV_PCM_FMTBIT_S16 | \
|
|
SNDRV_PCM_FMTBIT_S32)
|
|
|
|
struct fw_unit;
|
|
struct fw_iso_context;
|
|
struct snd_pcm_substream;
|
|
|
|
struct amdtp_out_stream {
|
|
struct fw_unit *unit;
|
|
enum cip_out_flags flags;
|
|
struct fw_iso_context *context;
|
|
struct mutex mutex;
|
|
|
|
enum cip_sfc sfc;
|
|
unsigned int data_block_quadlets;
|
|
unsigned int pcm_channels;
|
|
unsigned int midi_ports;
|
|
void (*transfer_samples)(struct amdtp_out_stream *s,
|
|
struct snd_pcm_substream *pcm,
|
|
__be32 *buffer, unsigned int frames);
|
|
|
|
unsigned int syt_interval;
|
|
unsigned int source_node_id_field;
|
|
struct iso_packets_buffer buffer;
|
|
|
|
struct snd_pcm_substream *pcm;
|
|
struct tasklet_struct period_tasklet;
|
|
|
|
int packet_index;
|
|
unsigned int data_block_counter;
|
|
|
|
unsigned int data_block_state;
|
|
|
|
unsigned int last_syt_offset;
|
|
unsigned int syt_offset_state;
|
|
|
|
unsigned int pcm_buffer_pointer;
|
|
unsigned int pcm_period_pointer;
|
|
bool pointer_flush;
|
|
};
|
|
|
|
int amdtp_out_stream_init(struct amdtp_out_stream *s, struct fw_unit *unit,
|
|
enum cip_out_flags flags);
|
|
void amdtp_out_stream_destroy(struct amdtp_out_stream *s);
|
|
|
|
void amdtp_out_stream_set_rate(struct amdtp_out_stream *s, unsigned int rate);
|
|
unsigned int amdtp_out_stream_get_max_payload(struct amdtp_out_stream *s);
|
|
|
|
int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed);
|
|
void amdtp_out_stream_update(struct amdtp_out_stream *s);
|
|
void amdtp_out_stream_stop(struct amdtp_out_stream *s);
|
|
|
|
void amdtp_out_stream_set_pcm_format(struct amdtp_out_stream *s,
|
|
snd_pcm_format_t format);
|
|
void amdtp_out_stream_pcm_prepare(struct amdtp_out_stream *s);
|
|
unsigned long amdtp_out_stream_pcm_pointer(struct amdtp_out_stream *s);
|
|
void amdtp_out_stream_pcm_abort(struct amdtp_out_stream *s);
|
|
|
|
/**
|
|
* amdtp_out_stream_set_pcm - configure format of PCM samples
|
|
* @s: the AMDTP output stream to be configured
|
|
* @pcm_channels: the number of PCM samples in each data block, to be encoded
|
|
* as AM824 multi-bit linear audio
|
|
*
|
|
* This function must not be called while the stream is running.
|
|
*/
|
|
static inline void amdtp_out_stream_set_pcm(struct amdtp_out_stream *s,
|
|
unsigned int pcm_channels)
|
|
{
|
|
s->pcm_channels = pcm_channels;
|
|
}
|
|
|
|
/**
|
|
* amdtp_out_stream_set_midi - configure format of MIDI data
|
|
* @s: the AMDTP output stream to be configured
|
|
* @midi_ports: the number of MIDI ports (i.e., MPX-MIDI Data Channels)
|
|
*
|
|
* This function must not be called while the stream is running.
|
|
*/
|
|
static inline void amdtp_out_stream_set_midi(struct amdtp_out_stream *s,
|
|
unsigned int midi_ports)
|
|
{
|
|
s->midi_ports = midi_ports;
|
|
}
|
|
|
|
/**
|
|
* amdtp_out_streaming_error - check for streaming error
|
|
* @s: the AMDTP output stream
|
|
*
|
|
* If this function returns true, the stream's packet queue has stopped due to
|
|
* an asynchronous error.
|
|
*/
|
|
static inline bool amdtp_out_streaming_error(struct amdtp_out_stream *s)
|
|
{
|
|
return s->packet_index < 0;
|
|
}
|
|
|
|
/**
|
|
* amdtp_out_stream_pcm_trigger - start/stop playback from a PCM device
|
|
* @s: the AMDTP output stream
|
|
* @pcm: the PCM device to be started, or %NULL to stop the current device
|
|
*
|
|
* Call this function on a running isochronous stream to enable the actual
|
|
* transmission of PCM data. This function should be called from the PCM
|
|
* device's .trigger callback.
|
|
*/
|
|
static inline void amdtp_out_stream_pcm_trigger(struct amdtp_out_stream *s,
|
|
struct snd_pcm_substream *pcm)
|
|
{
|
|
ACCESS_ONCE(s->pcm) = pcm;
|
|
}
|
|
|
|
static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc)
|
|
{
|
|
return sfc & 1;
|
|
}
|
|
|
|
#endif
|