| // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) |
| // Copyright(c) 2015-17 Intel Corporation. |
| |
| #ifndef __SOUNDWIRE_H |
| #define __SOUNDWIRE_H |
| |
| struct sdw_bus; |
| struct sdw_slave; |
| |
| /* SDW spec defines and enums, as defined by MIPI 1.1. Spec */ |
| |
| /* SDW Broadcast Device Number */ |
| #define SDW_BROADCAST_DEV_NUM 15 |
| |
| /* SDW Enumeration Device Number */ |
| #define SDW_ENUM_DEV_NUM 0 |
| |
| /* SDW Group Device Numbers */ |
| #define SDW_GROUP12_DEV_NUM 12 |
| #define SDW_GROUP13_DEV_NUM 13 |
| |
| /* SDW Master Device Number, not supported yet */ |
| #define SDW_MASTER_DEV_NUM 14 |
| |
| #define SDW_NUM_DEV_ID_REGISTERS 6 |
| /* frame shape defines */ |
| |
| /* |
| * Note: The maximum row define in SoundWire spec 1.1 is 23. In order to |
| * fill hole with 0, one more dummy entry is added |
| */ |
| #define SDW_FRAME_ROWS 24 |
| #define SDW_FRAME_COLS 8 |
| #define SDW_FRAME_ROW_COLS (SDW_FRAME_ROWS * SDW_FRAME_COLS) |
| |
| #define SDW_FRAME_CTRL_BITS 48 |
| #define SDW_MAX_DEVICES 11 |
| |
| #define SDW_VALID_PORT_RANGE(n) (n <= 14 && n >= 1) |
| |
| #define SDW_DAI_ID_RANGE_START 100 |
| #define SDW_DAI_ID_RANGE_END 200 |
| |
| /** |
| * enum sdw_slave_status - Slave status |
| * @SDW_SLAVE_UNATTACHED: Slave is not attached with the bus. |
| * @SDW_SLAVE_ATTACHED: Slave is attached with bus. |
| * @SDW_SLAVE_ALERT: Some alert condition on the Slave |
| * @SDW_SLAVE_RESERVED: Reserved for future use |
| */ |
| enum sdw_slave_status { |
| SDW_SLAVE_UNATTACHED = 0, |
| SDW_SLAVE_ATTACHED = 1, |
| SDW_SLAVE_ALERT = 2, |
| SDW_SLAVE_RESERVED = 3, |
| }; |
| |
| /** |
| * enum sdw_command_response - Command response as defined by SDW spec |
| * @SDW_CMD_OK: cmd was successful |
| * @SDW_CMD_IGNORED: cmd was ignored |
| * @SDW_CMD_FAIL: cmd was NACKed |
| * @SDW_CMD_TIMEOUT: cmd timedout |
| * @SDW_CMD_FAIL_OTHER: cmd failed due to other reason than above |
| * |
| * NOTE: The enum is different than actual Spec as response in the Spec is |
| * combination of ACK/NAK bits |
| * |
| * SDW_CMD_TIMEOUT/FAIL_OTHER is defined for SW use, not in spec |
| */ |
| enum sdw_command_response { |
| SDW_CMD_OK = 0, |
| SDW_CMD_IGNORED = 1, |
| SDW_CMD_FAIL = 2, |
| SDW_CMD_TIMEOUT = 3, |
| 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 |
| */ |
| enum sdw_clk_stop_reset_behave { |
| SDW_CLK_STOP_KEEP_STATUS = 1, |
| }; |
| |
| /** |
| * enum sdw_p15_behave - Slave Port 15 behaviour when the Master attempts a |
| * read |
| * @SDW_P15_READ_IGNORED: Read is ignored |
| * @SDW_P15_CMD_OK: Command is ok |
| */ |
| enum sdw_p15_behave { |
| SDW_P15_READ_IGNORED = 0, |
| SDW_P15_CMD_OK = 1, |
| }; |
| |
| /** |
| * enum sdw_dpn_type - Data port types |
| * @SDW_DPN_FULL: Full Data Port is supported |
| * @SDW_DPN_SIMPLE: Simplified Data Port as defined in spec. |
| * DPN_SampleCtrl2, DPN_OffsetCtrl2, DPN_HCtrl and DPN_BlockCtrl3 |
| * are not implemented. |
| * @SDW_DPN_REDUCED: Reduced Data Port as defined in spec. |
| * DPN_SampleCtrl2, DPN_HCtrl are not implemented. |
| */ |
| enum sdw_dpn_type { |
| SDW_DPN_FULL = 0, |
| SDW_DPN_SIMPLE = 1, |
| SDW_DPN_REDUCED = 2, |
| }; |
| |
| /** |
| * enum sdw_clk_stop_mode - Clock Stop modes |
| * @SDW_CLK_STOP_MODE0: Slave can continue operation seamlessly on clock |
| * restart |
| * @SDW_CLK_STOP_MODE1: Slave may have entered a deeper power-saving mode, |
| * not capable of continuing operation seamlessly when the clock restarts |
| */ |
| enum sdw_clk_stop_mode { |
| SDW_CLK_STOP_MODE0 = 0, |
| SDW_CLK_STOP_MODE1 = 1, |
| }; |
| |
| /** |
| * struct sdw_dp0_prop - DP0 properties |
| * @max_word: Maximum number of bits in a Payload Channel Sample, 1 to 64 |
| * (inclusive) |
| * @min_word: Minimum number of bits in a Payload Channel Sample, 1 to 64 |
| * (inclusive) |
| * @num_words: number of wordlengths supported |
| * @words: wordlengths supported |
| * @flow_controlled: Slave implementation results in an OK_NotReady |
| * response |
| * @simple_ch_prep_sm: If channel prepare sequence is required |
| * @device_interrupts: If implementation-defined interrupts are supported |
| * |
| * The wordlengths are specified by Spec as max, min AND number of |
| * discrete values, implementation can define based on the wordlengths they |
| * support |
| */ |
| struct sdw_dp0_prop { |
| u32 max_word; |
| u32 min_word; |
| u32 num_words; |
| u32 *words; |
| bool flow_controlled; |
| bool simple_ch_prep_sm; |
| bool device_interrupts; |
| }; |
| |
| /** |
| * struct sdw_dpn_audio_mode - Audio mode properties for DPn |
| * @bus_min_freq: Minimum bus frequency, in Hz |
| * @bus_max_freq: Maximum bus frequency, in Hz |
| * @bus_num_freq: Number of discrete frequencies supported |
| * @bus_freq: Discrete bus frequencies, in Hz |
| * @min_freq: Minimum sampling frequency, in Hz |
| * @max_freq: Maximum sampling bus frequency, in Hz |
| * @num_freq: Number of discrete sampling frequency supported |
| * @freq: Discrete sampling frequencies, in Hz |
| * @prep_ch_behave: Specifies the dependencies between Channel Prepare |
| * sequence and bus clock configuration |
| * If 0, Channel Prepare can happen at any Bus clock rate |
| * If 1, Channel Prepare sequence shall happen only after Bus clock is |
| * changed to a frequency supported by this mode or compatible modes |
| * described by the next field |
| * @glitchless: Bitmap describing possible glitchless transitions from this |
| * Audio Mode to other Audio Modes |
| */ |
| struct sdw_dpn_audio_mode { |
| u32 bus_min_freq; |
| u32 bus_max_freq; |
| u32 bus_num_freq; |
| u32 *bus_freq; |
| u32 max_freq; |
| u32 min_freq; |
| u32 num_freq; |
| u32 *freq; |
| u32 prep_ch_behave; |
| u32 glitchless; |
| }; |
| |
| /** |
| * struct sdw_dpn_prop - Data Port DPn properties |
| * @num: port number |
| * @max_word: Maximum number of bits in a Payload Channel Sample, 1 to 64 |
| * (inclusive) |
| * @min_word: Minimum number of bits in a Payload Channel Sample, 1 to 64 |
| * (inclusive) |
| * @num_words: Number of discrete supported wordlengths |
| * @words: Discrete supported wordlength |
| * @type: Data port type. Full, Simplified or Reduced |
| * @max_grouping: Maximum number of samples that can be grouped together for |
| * a full data port |
| * @simple_ch_prep_sm: If the port supports simplified channel prepare state |
| * machine |
| * @ch_prep_timeout: Port-specific timeout value, in milliseconds |
| * @device_interrupts: If set, each bit corresponds to support for |
| * implementation-defined interrupts |
| * @max_ch: Maximum channels supported |
| * @min_ch: Minimum channels supported |
| * @num_ch: Number of discrete channels supported |
| * @ch: Discrete channels supported |
| * @num_ch_combinations: Number of channel combinations supported |
| * @ch_combinations: Channel combinations supported |
| * @modes: SDW mode supported |
| * @max_async_buffer: Number of samples that this port can buffer in |
| * asynchronous modes |
| * @block_pack_mode: Type of block port mode supported |
| * @port_encoding: Payload Channel Sample encoding schemes supported |
| * @audio_modes: Audio modes supported |
| */ |
| struct sdw_dpn_prop { |
| u32 num; |
| u32 max_word; |
| u32 min_word; |
| u32 num_words; |
| u32 *words; |
| enum sdw_dpn_type type; |
| u32 max_grouping; |
| bool simple_ch_prep_sm; |
| u32 ch_prep_timeout; |
| u32 device_interrupts; |
| u32 max_ch; |
| u32 min_ch; |
| u32 num_ch; |
| u32 *ch; |
| u32 num_ch_combinations; |
| u32 *ch_combinations; |
| u32 modes; |
| u32 max_async_buffer; |
| bool block_pack_mode; |
| u32 port_encoding; |
| struct sdw_dpn_audio_mode *audio_modes; |
| }; |
| |
| /** |
| * struct sdw_slave_prop - SoundWire Slave properties |
| * @mipi_revision: Spec version of the implementation |
| * @wake_capable: Wake-up events are supported |
| * @test_mode_capable: If test mode is supported |
| * @clk_stop_mode1: Clock-Stop Mode 1 is supported |
| * @simple_clk_stop_capable: Simple clock mode is supported |
| * @clk_stop_timeout: Worst-case latency of the Clock Stop Prepare State |
| * Machine transitions, in milliseconds |
| * @ch_prep_timeout: Worst-case latency of the Channel Prepare State Machine |
| * transitions, in milliseconds |
| * @reset_behave: Slave keeps the status of the SlaveStopClockPrepare |
| * state machine (P=1 SCSP_SM) after exit from clock-stop mode1 |
| * @high_PHY_capable: Slave is HighPHY capable |
| * @paging_support: Slave implements paging registers SCP_AddrPage1 and |
| * SCP_AddrPage2 |
| * @bank_delay_support: Slave implements bank delay/bridge support registers |
| * SCP_BankDelay and SCP_NextFrame |
| * @p15_behave: Slave behavior when the Master attempts a read to the Port15 |
| * alias |
| * @lane_control_support: Slave supports lane control |
| * @master_count: Number of Masters present on this Slave |
| * @source_ports: Bitmap identifying source ports |
| * @sink_ports: Bitmap identifying sink ports |
| * @dp0_prop: Data Port 0 properties |
| * @src_dpn_prop: Source Data Port N properties |
| * @sink_dpn_prop: Sink Data Port N properties |
| */ |
| struct sdw_slave_prop { |
| u32 mipi_revision; |
| bool wake_capable; |
| bool test_mode_capable; |
| bool clk_stop_mode1; |
| bool simple_clk_stop_capable; |
| u32 clk_stop_timeout; |
| u32 ch_prep_timeout; |
| enum sdw_clk_stop_reset_behave reset_behave; |
| bool high_PHY_capable; |
| bool paging_support; |
| bool bank_delay_support; |
| enum sdw_p15_behave p15_behave; |
| bool lane_control_support; |
| u32 master_count; |
| u32 source_ports; |
| u32 sink_ports; |
| struct sdw_dp0_prop *dp0_prop; |
| struct sdw_dpn_prop *src_dpn_prop; |
| struct sdw_dpn_prop *sink_dpn_prop; |
| }; |
| |
| /** |
| * struct sdw_master_prop - Master properties |
| * @revision: MIPI spec version of the implementation |
| * @master_count: Number of masters |
| * @clk_stop_mode: Bitmap for Clock Stop modes supported |
| * @max_freq: Maximum Bus clock frequency, in Hz |
| * @num_clk_gears: Number of clock gears supported |
| * @clk_gears: Clock gears supported |
| * @num_freq: Number of clock frequencies supported, in Hz |
| * @freq: Clock frequencies supported, in Hz |
| * @default_frame_rate: Controller default Frame rate, in Hz |
| * @default_row: Number of rows |
| * @default_col: Number of columns |
| * @dynamic_frame: Dynamic frame supported |
| * @err_threshold: Number of times that software may retry sending a single |
| * command |
| * @dpn_prop: Data Port N properties |
| */ |
| struct sdw_master_prop { |
| u32 revision; |
| u32 master_count; |
| enum sdw_clk_stop_mode clk_stop_mode; |
| u32 max_freq; |
| u32 num_clk_gears; |
| u32 *clk_gears; |
| u32 num_freq; |
| u32 *freq; |
| u32 default_frame_rate; |
| u32 default_row; |
| u32 default_col; |
| bool dynamic_frame; |
| u32 err_threshold; |
| struct sdw_dpn_prop *dpn_prop; |
| }; |
| |
| int sdw_master_read_prop(struct sdw_bus *bus); |
| int sdw_slave_read_prop(struct sdw_slave *slave); |
| |
| /* |
| * SDW Slave Structures and APIs |
| */ |
| |
| /** |
| * struct sdw_slave_id - Slave ID |
| * @mfg_id: MIPI Manufacturer ID |
| * @part_id: Device Part ID |
| * @class_id: MIPI Class ID, unused now. |
| * Currently a placeholder in MIPI SoundWire Spec |
| * @unique_id: Device unique ID |
| * @sdw_version: SDW version implemented |
| * |
| * The order of the IDs here does not follow the DisCo spec definitions |
| */ |
| struct sdw_slave_id { |
| __u16 mfg_id; |
| __u16 part_id; |
| __u8 class_id; |
| __u8 unique_id:4; |
| __u8 sdw_version:4; |
| }; |
| |
| /** |
| * struct sdw_slave_intr_status - Slave interrupt status |
| * @control_port: control port status |
| * @port: data port status |
| */ |
| struct sdw_slave_intr_status { |
| u8 control_port; |
| u8 port[15]; |
| }; |
| |
| /** |
| * sdw_reg_bank - SoundWire register banks |
| * @SDW_BANK0: Soundwire register bank 0 |
| * @SDW_BANK1: Soundwire register bank 1 |
| */ |
| enum sdw_reg_bank { |
| SDW_BANK0, |
| SDW_BANK1, |
| }; |
| |
| /** |
| * struct sdw_bus_conf: Bus configuration |
| * |
| * @clk_freq: Clock frequency, in Hz |
| * @num_rows: Number of rows in frame |
| * @num_cols: Number of columns in frame |
| * @bank: Next register bank |
| */ |
| struct sdw_bus_conf { |
| unsigned int clk_freq; |
| unsigned int num_rows; |
| unsigned int num_cols; |
| unsigned int bank; |
| }; |
| |
| /** |
| * struct sdw_prepare_ch: Prepare/De-prepare Data Port channel |
| * |
| * @num: Port number |
| * @ch_mask: Active channel mask |
| * @prepare: Prepare (true) /de-prepare (false) channel |
| * @bank: Register bank, which bank Slave/Master driver should program for |
| * implementation defined registers. This is always updated to next_bank |
| * value read from bus params. |
| * |
| */ |
| struct sdw_prepare_ch { |
| unsigned int num; |
| unsigned int ch_mask; |
| bool prepare; |
| unsigned int bank; |
| }; |
| |
| /** |
| * enum sdw_port_prep_ops: Prepare operations for Data Port |
| * |
| * @SDW_OPS_PORT_PRE_PREP: Pre prepare operation for the Port |
| * @SDW_OPS_PORT_PREP: Prepare operation for the Port |
| * @SDW_OPS_PORT_POST_PREP: Post prepare operation for the Port |
| */ |
| enum sdw_port_prep_ops { |
| SDW_OPS_PORT_PRE_PREP = 0, |
| SDW_OPS_PORT_PREP = 1, |
| SDW_OPS_PORT_POST_PREP = 2, |
| }; |
| |
| /** |
| * struct sdw_bus_params: Structure holding bus configuration |
| * |
| * @curr_bank: Current bank in use (BANK0/BANK1) |
| * @next_bank: Next bank to use (BANK0/BANK1). next_bank will always be |
| * set to !curr_bank |
| * @max_dr_freq: Maximum double rate clock frequency supported, in Hz |
| * @curr_dr_freq: Current double rate clock frequency, in Hz |
| * @bandwidth: Current bandwidth |
| * @col: Active columns |
| * @row: Active rows |
| */ |
| struct sdw_bus_params { |
| enum sdw_reg_bank curr_bank; |
| enum sdw_reg_bank next_bank; |
| unsigned int max_dr_freq; |
| unsigned int curr_dr_freq; |
| unsigned int bandwidth; |
| unsigned int col; |
| unsigned int row; |
| }; |
| |
| /** |
| * struct sdw_slave_ops: Slave driver callback ops |
| * |
| * @read_prop: Read Slave properties |
| * @interrupt_callback: Device interrupt notification (invoked in thread |
| * context) |
| * @update_status: Update Slave status |
| * @bus_config: Update the bus config for Slave |
| * @port_prep: Prepare the port with parameters |
| */ |
| struct sdw_slave_ops { |
| int (*read_prop)(struct sdw_slave *sdw); |
| int (*interrupt_callback)(struct sdw_slave *slave, |
| struct sdw_slave_intr_status *status); |
| int (*update_status)(struct sdw_slave *slave, |
| enum sdw_slave_status status); |
| int (*bus_config)(struct sdw_slave *slave, |
| struct sdw_bus_params *params); |
| int (*port_prep)(struct sdw_slave *slave, |
| struct sdw_prepare_ch *prepare_ch, |
| enum sdw_port_prep_ops pre_ops); |
| }; |
| |
| /** |
| * struct sdw_slave - SoundWire Slave |
| * @id: MIPI device ID |
| * @dev: Linux device |
| * @status: Status reported by the Slave |
| * @bus: Bus handle |
| * @ops: Slave callback ops |
| * @prop: Slave properties |
| * @node: node for bus list |
| * @port_ready: Port ready completion flag for each Slave port |
| * @dev_num: Device Number assigned by Bus |
| */ |
| struct sdw_slave { |
| struct sdw_slave_id id; |
| struct device dev; |
| enum sdw_slave_status status; |
| struct sdw_bus *bus; |
| const struct sdw_slave_ops *ops; |
| struct sdw_slave_prop prop; |
| struct list_head node; |
| struct completion *port_ready; |
| u16 dev_num; |
| }; |
| |
| #define dev_to_sdw_dev(_dev) container_of(_dev, struct sdw_slave, dev) |
| |
| struct sdw_driver { |
| const char *name; |
| |
| int (*probe)(struct sdw_slave *sdw, |
| const struct sdw_device_id *id); |
| int (*remove)(struct sdw_slave *sdw); |
| void (*shutdown)(struct sdw_slave *sdw); |
| |
| const struct sdw_device_id *id_table; |
| const struct sdw_slave_ops *ops; |
| |
| struct device_driver driver; |
| }; |
| |
| #define SDW_SLAVE_ENTRY(_mfg_id, _part_id, _drv_data) \ |
| { .mfg_id = (_mfg_id), .part_id = (_part_id), \ |
| .driver_data = (unsigned long)(_drv_data) } |
| |
| int sdw_handle_slave_status(struct sdw_bus *bus, |
| enum sdw_slave_status status[]); |
| |
| /* |
| * SDW master structures and APIs |
| */ |
| |
| /** |
| * struct sdw_port_params: Data Port parameters |
| * |
| * @num: Port number |
| * @bps: Word length of the Port |
| * @flow_mode: Port Data flow mode |
| * @data_mode: Test modes or normal mode |
| * |
| * This is used to program the Data Port based on Data Port stream |
| * parameters. |
| */ |
| struct sdw_port_params { |
| unsigned int num; |
| unsigned int bps; |
| unsigned int flow_mode; |
| unsigned int data_mode; |
| }; |
| |
| /** |
| * struct sdw_transport_params: Data Port Transport Parameters |
| * |
| * @blk_grp_ctrl_valid: Port implements block group control |
| * @num: Port number |
| * @blk_grp_ctrl: Block group control value |
| * @sample_interval: Sample interval |
| * @offset1: Blockoffset of the payload data |
| * @offset2: Blockoffset of the payload data |
| * @hstart: Horizontal start of the payload data |
| * @hstop: Horizontal stop of the payload data |
| * @blk_pkg_mode: Block per channel or block per port |
| * @lane_ctrl: Data lane Port uses for Data transfer. Currently only single |
| * data lane is supported in bus |
| * |
| * This is used to program the Data Port based on Data Port transport |
| * parameters. All these parameters are banked and can be modified |
| * during a bank switch without any artifacts in audio stream. |
| */ |
| struct sdw_transport_params { |
| bool blk_grp_ctrl_valid; |
| unsigned int port_num; |
| unsigned int blk_grp_ctrl; |
| unsigned int sample_interval; |
| unsigned int offset1; |
| unsigned int offset2; |
| unsigned int hstart; |
| unsigned int hstop; |
| unsigned int blk_pkg_mode; |
| unsigned int lane_ctrl; |
| }; |
| |
| /** |
| * struct sdw_enable_ch: Enable/disable Data Port channel |
| * |
| * @num: Port number |
| * @ch_mask: Active channel mask |
| * @enable: Enable (true) /disable (false) channel |
| */ |
| struct sdw_enable_ch { |
| unsigned int port_num; |
| unsigned int ch_mask; |
| bool enable; |
| }; |
| |
| /** |
| * struct sdw_master_port_ops: Callback functions from bus to Master |
| * driver to set Master Data ports. |
| * |
| * @dpn_set_port_params: Set the Port parameters for the Master Port. |
| * Mandatory callback |
| * @dpn_set_port_transport_params: Set transport parameters for the Master |
| * Port. Mandatory callback |
| * @dpn_port_prep: Port prepare operations for the Master Data Port. |
| * @dpn_port_enable_ch: Enable the channels of Master Port. |
| */ |
| struct sdw_master_port_ops { |
| int (*dpn_set_port_params)(struct sdw_bus *bus, |
| struct sdw_port_params *port_params, |
| unsigned int bank); |
| int (*dpn_set_port_transport_params)(struct sdw_bus *bus, |
| struct sdw_transport_params *transport_params, |
| enum sdw_reg_bank bank); |
| int (*dpn_port_prep)(struct sdw_bus *bus, |
| struct sdw_prepare_ch *prepare_ch); |
| int (*dpn_port_enable_ch)(struct sdw_bus *bus, |
| struct sdw_enable_ch *enable_ch, unsigned int bank); |
| }; |
| |
| struct sdw_msg; |
| |
| /** |
| * struct sdw_defer - SDW deffered message |
| * @length: message length |
| * @complete: message completion |
| * @msg: SDW message |
| */ |
| struct sdw_defer { |
| int length; |
| struct completion complete; |
| struct sdw_msg *msg; |
| }; |
| |
| /** |
| * struct sdw_master_ops - Master driver ops |
| * @read_prop: Read Master properties |
| * @xfer_msg: Transfer message callback |
| * @xfer_msg_defer: Defer version of transfer message callback |
| * @reset_page_addr: Reset the SCP page address registers |
| * @set_bus_conf: Set the bus configuration |
| * @pre_bank_switch: Callback for pre bank switch |
| * @post_bank_switch: Callback for post bank switch |
| */ |
| struct sdw_master_ops { |
| int (*read_prop)(struct sdw_bus *bus); |
| |
| enum sdw_command_response (*xfer_msg) |
| (struct sdw_bus *bus, struct sdw_msg *msg); |
| enum sdw_command_response (*xfer_msg_defer) |
| (struct sdw_bus *bus, struct sdw_msg *msg, |
| struct sdw_defer *defer); |
| enum sdw_command_response (*reset_page_addr) |
| (struct sdw_bus *bus, unsigned int dev_num); |
| int (*set_bus_conf)(struct sdw_bus *bus, |
| struct sdw_bus_params *params); |
| int (*pre_bank_switch)(struct sdw_bus *bus); |
| int (*post_bank_switch)(struct sdw_bus *bus); |
| |
| }; |
| |
| /** |
| * struct sdw_bus - SoundWire bus |
| * @dev: Master linux device |
| * @link_id: Link id number, can be 0 to N, unique for each Master |
| * @slaves: list of Slaves on this bus |
| * @assigned: Bitmap for Slave device numbers. |
| * Bit set implies used number, bit clear implies unused number. |
| * @bus_lock: bus lock |
| * @msg_lock: message lock |
| * @ops: Master callback ops |
| * @port_ops: Master port callback ops |
| * @params: Current bus parameters |
| * @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 |
| * @bank_switch_timeout: Bank switch timeout computed |
| */ |
| struct sdw_bus { |
| struct device *dev; |
| unsigned int link_id; |
| struct list_head slaves; |
| DECLARE_BITMAP(assigned, SDW_MAX_DEVICES); |
| struct mutex bus_lock; |
| struct mutex msg_lock; |
| const struct sdw_master_ops *ops; |
| const struct sdw_master_port_ops *port_ops; |
| struct sdw_bus_params params; |
| struct sdw_master_prop prop; |
| struct list_head m_rt_list; |
| struct sdw_defer defer_msg; |
| unsigned int clk_stop_timeout; |
| u32 bank_switch_timeout; |
| }; |
| |
| int sdw_add_bus_master(struct sdw_bus *bus); |
| void sdw_delete_bus_master(struct sdw_bus *bus); |
| |
| /** |
| * sdw_port_config: Master or Slave Port configuration |
| * |
| * @num: Port number |
| * @ch_mask: channels mask for port |
| */ |
| struct sdw_port_config { |
| unsigned int num; |
| unsigned int ch_mask; |
| }; |
| |
| /** |
| * 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_port_config *port_config, |
| unsigned int num_ports, |
| struct sdw_stream_runtime *stream); |
| int sdw_stream_add_slave(struct sdw_slave *slave, |
| struct sdw_stream_config *stream_config, |
| struct sdw_port_config *port_config, |
| unsigned int num_ports, |
| 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); |
| int sdw_prepare_stream(struct sdw_stream_runtime *stream); |
| int sdw_enable_stream(struct sdw_stream_runtime *stream); |
| int sdw_disable_stream(struct sdw_stream_runtime *stream); |
| int sdw_deprepare_stream(struct sdw_stream_runtime *stream); |
| |
| /* messaging and data APIs */ |
| |
| int sdw_read(struct sdw_slave *slave, u32 addr); |
| int sdw_write(struct sdw_slave *slave, u32 addr, u8 value); |
| int sdw_nread(struct sdw_slave *slave, u32 addr, size_t count, u8 *val); |
| int sdw_nwrite(struct sdw_slave *slave, u32 addr, size_t count, u8 *val); |
| |
| #endif /* __SOUNDWIRE_H */ |
