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soundwire: Add support for SoundWire stream management

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This patch adds APIs and relevant stream data structures
for initialization and release of stream.

Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com>
Signed-off-by: Shreyas NC <shreyas.nc@intel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Sanyog Kale
2018-04-26 18:38:08 +05:30
committed by Vinod Koul
parent 89634f99a8
commit 89e590535f
5 changed files with 507 additions and 1 deletions
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109
include/linux/soundwire/sdw.h
View File

@@ -61,6 +61,30 @@ enum sdw_command_response {
SDW_CMD_FAIL_OTHER = 4,
};
/**
* enum sdw_stream_type: data stream type
*
* @SDW_STREAM_PCM: PCM data stream
* @SDW_STREAM_PDM: PDM data stream
*
* spec doesn't define this, but is used in implementation
*/
enum sdw_stream_type {
SDW_STREAM_PCM = 0,
SDW_STREAM_PDM = 1,
};
/**
* enum sdw_data_direction: Data direction
*
* @SDW_DATA_DIR_RX: Data into Port
* @SDW_DATA_DIR_TX: Data out of Port
*/
enum sdw_data_direction {
SDW_DATA_DIR_RX = 0,
SDW_DATA_DIR_TX = 1,
};
/*
* SDW properties, defined in MIPI DisCo spec v1.0
*/
@@ -450,6 +474,9 @@ struct sdw_master_ops {
* @msg_lock: message lock
* @ops: Master callback ops
* @prop: Master properties
* @m_rt_list: List of Master instance of all stream(s) running on Bus. This
* is used to compute and program bus bandwidth, clock, frame shape,
* transport and port parameters
* @defer_msg: Defer message
* @clk_stop_timeout: Clock stop timeout computed
*/
@@ -462,6 +489,7 @@ struct sdw_bus {
struct mutex msg_lock;
const struct sdw_master_ops *ops;
struct sdw_master_prop prop;
struct list_head m_rt_list;
struct sdw_defer defer_msg;
unsigned int clk_stop_timeout;
};
@@ -469,6 +497,87 @@ struct sdw_bus {
int sdw_add_bus_master(struct sdw_bus *bus);
void sdw_delete_bus_master(struct sdw_bus *bus);
/**
* sdw_stream_config: Master or Slave stream configuration
*
* @frame_rate: Audio frame rate of the stream, in Hz
* @ch_count: Channel count of the stream
* @bps: Number of bits per audio sample
* @direction: Data direction
* @type: Stream type PCM or PDM
*/
struct sdw_stream_config {
unsigned int frame_rate;
unsigned int ch_count;
unsigned int bps;
enum sdw_data_direction direction;
enum sdw_stream_type type;
};
/**
* sdw_stream_state: Stream states
*
* @SDW_STREAM_ALLOCATED: New stream allocated.
* @SDW_STREAM_CONFIGURED: Stream configured
* @SDW_STREAM_PREPARED: Stream prepared
* @SDW_STREAM_ENABLED: Stream enabled
* @SDW_STREAM_DISABLED: Stream disabled
* @SDW_STREAM_DEPREPARED: Stream de-prepared
* @SDW_STREAM_RELEASED: Stream released
*/
enum sdw_stream_state {
SDW_STREAM_ALLOCATED = 0,
SDW_STREAM_CONFIGURED = 1,
SDW_STREAM_PREPARED = 2,
SDW_STREAM_ENABLED = 3,
SDW_STREAM_DISABLED = 4,
SDW_STREAM_DEPREPARED = 5,
SDW_STREAM_RELEASED = 6,
};
/**
* sdw_stream_params: Stream parameters
*
* @rate: Sampling frequency, in Hz
* @ch_count: Number of channels
* @bps: bits per channel sample
*/
struct sdw_stream_params {
unsigned int rate;
unsigned int ch_count;
unsigned int bps;
};
/**
* sdw_stream_runtime: Runtime stream parameters
*
* @name: SoundWire stream name
* @params: Stream parameters
* @state: Current state of the stream
* @type: Stream type PCM or PDM
* @m_rt: Master runtime
*/
struct sdw_stream_runtime {
char *name;
struct sdw_stream_params params;
enum sdw_stream_state state;
enum sdw_stream_type type;
struct sdw_master_runtime *m_rt;
};
struct sdw_stream_runtime *sdw_alloc_stream(char *stream_name);
void sdw_release_stream(struct sdw_stream_runtime *stream);
int sdw_stream_add_master(struct sdw_bus *bus,
struct sdw_stream_config *stream_config,
struct sdw_stream_runtime *stream);
int sdw_stream_add_slave(struct sdw_slave *slave,
struct sdw_stream_config *stream_config,
struct sdw_stream_runtime *stream);
int sdw_stream_remove_master(struct sdw_bus *bus,
struct sdw_stream_runtime *stream);
int sdw_stream_remove_slave(struct sdw_slave *slave,
struct sdw_stream_runtime *stream);
/* messaging and data APIs */
int sdw_read(struct sdw_slave *slave, u32 addr);