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/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
/* Copyright(c) 2015-17 Intel Corporation. */
#include <sound/soc.h>
#ifndef __SDW_CADENCE_H
#define __SDW_CADENCE_H
#define SDW_CADENCE_GSYNC_KHZ 4 /* 4 kHz */
#define SDW_CADENCE_GSYNC_HZ (SDW_CADENCE_GSYNC_KHZ * 1000)
/*
* The Cadence IP supports up to 32 entries in the FIFO, though implementations
* can configure the IP to have a smaller FIFO.
*/
#define CDNS_MCP_IP_MAX_CMD_LEN 32
#define SDW_CADENCE_MCP_IP_OFFSET 0x4000
/**
* struct sdw_cdns_pdi: PDI (Physical Data Interface) instance
*
* @num: pdi number
* @intel_alh_id: link identifier
* @l_ch_num: low channel for PDI
* @h_ch_num: high channel for PDI
* @ch_count: total channel count for PDI
* @dir: data direction
* @type: stream type, (only PCM supported)
*/
struct sdw_cdns_pdi {
int num;
int intel_alh_id;
int l_ch_num;
int h_ch_num;
int ch_count;
enum sdw_data_direction dir;
enum sdw_stream_type type;
};
/**
* struct sdw_cdns_streams: Cadence stream data structure
*
* @num_bd: number of bidirectional streams
* @num_in: number of input streams
* @num_out: number of output streams
* @num_ch_bd: number of bidirectional stream channels
* @num_ch_bd: number of input stream channels
* @num_ch_bd: number of output stream channels
* @num_pdi: total number of PDIs
* @bd: bidirectional streams
* @in: input streams
* @out: output streams
*/
struct sdw_cdns_streams {
unsigned int num_bd;
unsigned int num_in;
unsigned int num_out;
unsigned int num_ch_bd;
unsigned int num_ch_in;
unsigned int num_ch_out;
unsigned int num_pdi;
struct sdw_cdns_pdi *bd;
struct sdw_cdns_pdi *in;
struct sdw_cdns_pdi *out;
};
/**
* struct sdw_cdns_stream_config: stream configuration
*
* @pcm_bd: number of bidirectional PCM streams supported
* @pcm_in: number of input PCM streams supported
* @pcm_out: number of output PCM streams supported
*/
struct sdw_cdns_stream_config {
unsigned int pcm_bd;
unsigned int pcm_in;
unsigned int pcm_out;
};
/**
* struct sdw_cdns_dai_runtime: Cadence DAI runtime data
*
* @name: SoundWire stream name
* @stream: stream runtime
* @pdi: PDI used for this dai
* @bus: Bus handle
* @stream_type: Stream type
* @link_id: Master link id
* @suspended: status set when suspended, to be used in .prepare
* @paused: status set in .trigger, to be used in suspend
* @direction: stream direction
*/
struct sdw_cdns_dai_runtime {
char *name;
struct sdw_stream_runtime *stream;
struct sdw_cdns_pdi *pdi;
struct sdw_bus *bus;
enum sdw_stream_type stream_type;
int link_id;
bool suspended;
bool paused;
int direction;
};
/**
* struct sdw_cdns - Cadence driver context
* @dev: Linux device
* @bus: Bus handle
* @instance: instance number
* @ip_offset: version-dependent offset to access IP_MCP registers and fields
* @response_buf: SoundWire response buffer
* @tx_complete: Tx completion
* @ports: Data ports
* @num_ports: Total number of data ports
* @pcm: PCM streams
* @registers: Cadence registers
* @link_up: Link status
* @msg_count: Messages sent on bus
* @dai_runtime_array: runtime context for each allocated DAI.
* @status_update_lock: protect concurrency between interrupt-based and delayed work
* status update
*/
struct sdw_cdns {
struct device *dev;
struct sdw_bus bus;
unsigned int instance;
u32 ip_offset;
/*
* The datasheet says the RX FIFO AVAIL can be 2 entries more
* than the FIFO capacity, so allow for this.
*/
u32 response_buf[CDNS_MCP_IP_MAX_CMD_LEN + 2];
struct completion tx_complete;
struct sdw_cdns_port *ports;
int num_ports;
struct sdw_cdns_streams pcm;
int pdi_loopback_source;
int pdi_loopback_target;
void __iomem *registers;
bool link_up;
unsigned int msg_count;
bool interrupt_enabled;
struct work_struct work;
struct delayed_work attach_dwork;
struct list_head list;
struct sdw_cdns_dai_runtime **dai_runtime_array;
struct mutex status_update_lock; /* add mutual exclusion to sdw_handle_slave_status() */
};
#define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus)
/* Exported symbols */
int sdw_cdns_probe(struct sdw_cdns *cdns);
irqreturn_t sdw_cdns_irq(int irq, void *dev_id);
irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
int sdw_cdns_init(struct sdw_cdns *cdns);
int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
struct sdw_cdns_stream_config config);
int sdw_cdns_exit_reset(struct sdw_cdns *cdns);
int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state);
bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns);
int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake);
int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset);
#ifdef CONFIG_DEBUG_FS
void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root);
#endif
struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns,
struct sdw_cdns_streams *stream,
u32 ch, u32 dir, int dai_id);
void sdw_cdns_config_stream(struct sdw_cdns *cdns,
u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);
enum sdw_command_response
cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg);
enum sdw_command_response
cdns_xfer_msg_defer(struct sdw_bus *bus);
u32 cdns_read_ping_status(struct sdw_bus *bus);
int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);
int cdns_set_sdw_stream(struct snd_soc_dai *dai,
void *stream, int direction);
void sdw_cdns_check_self_clearing_bits(struct sdw_cdns *cdns, const char *string,
bool initial_delay, int reset_iterations);
void sdw_cdns_config_update(struct sdw_cdns *cdns);
int sdw_cdns_config_update_set_wait(struct sdw_cdns *cdns);
#endif /* __SDW_CADENCE_H */
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