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1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */2/* Copyright(c) 2015-17 Intel Corporation. */3#include <sound/soc.h>4 5#ifndef __SDW_CADENCE_H6#define __SDW_CADENCE_H7 8#define SDW_CADENCE_GSYNC_KHZ 4 /* 4 kHz */9#define SDW_CADENCE_GSYNC_HZ (SDW_CADENCE_GSYNC_KHZ * 1000)10 11/*12 * The Cadence IP supports up to 32 entries in the FIFO, though implementations13 * can configure the IP to have a smaller FIFO.14 */15#define CDNS_MCP_IP_MAX_CMD_LEN 3216 17#define SDW_CADENCE_MCP_IP_OFFSET 0x400018 19/**20 * struct sdw_cdns_pdi: PDI (Physical Data Interface) instance21 *22 * @num: pdi number23 * @intel_alh_id: link identifier24 * @l_ch_num: low channel for PDI25 * @h_ch_num: high channel for PDI26 * @ch_count: total channel count for PDI27 * @dir: data direction28 * @type: stream type, (only PCM supported)29 */30struct sdw_cdns_pdi {31 int num;32 int intel_alh_id;33 int l_ch_num;34 int h_ch_num;35 int ch_count;36 enum sdw_data_direction dir;37 enum sdw_stream_type type;38};39 40/**41 * struct sdw_cdns_streams: Cadence stream data structure42 *43 * @num_bd: number of bidirectional streams44 * @num_in: number of input streams45 * @num_out: number of output streams46 * @num_ch_bd: number of bidirectional stream channels47 * @num_ch_bd: number of input stream channels48 * @num_ch_bd: number of output stream channels49 * @num_pdi: total number of PDIs50 * @bd: bidirectional streams51 * @in: input streams52 * @out: output streams53 */54struct sdw_cdns_streams {55 unsigned int num_bd;56 unsigned int num_in;57 unsigned int num_out;58 unsigned int num_ch_bd;59 unsigned int num_ch_in;60 unsigned int num_ch_out;61 unsigned int num_pdi;62 struct sdw_cdns_pdi *bd;63 struct sdw_cdns_pdi *in;64 struct sdw_cdns_pdi *out;65};66 67/**68 * struct sdw_cdns_stream_config: stream configuration69 *70 * @pcm_bd: number of bidirectional PCM streams supported71 * @pcm_in: number of input PCM streams supported72 * @pcm_out: number of output PCM streams supported73 */74struct sdw_cdns_stream_config {75 unsigned int pcm_bd;76 unsigned int pcm_in;77 unsigned int pcm_out;78};79 80/**81 * struct sdw_cdns_dai_runtime: Cadence DAI runtime data82 *83 * @name: SoundWire stream name84 * @stream: stream runtime85 * @pdi: PDI used for this dai86 * @bus: Bus handle87 * @stream_type: Stream type88 * @link_id: Master link id89 * @suspended: status set when suspended, to be used in .prepare90 * @paused: status set in .trigger, to be used in suspend91 * @direction: stream direction92 */93struct sdw_cdns_dai_runtime {94 char *name;95 struct sdw_stream_runtime *stream;96 struct sdw_cdns_pdi *pdi;97 struct sdw_bus *bus;98 enum sdw_stream_type stream_type;99 int link_id;100 bool suspended;101 bool paused;102 int direction;103};104 105/**106 * struct sdw_cdns - Cadence driver context107 * @dev: Linux device108 * @bus: Bus handle109 * @instance: instance number110 * @ip_offset: version-dependent offset to access IP_MCP registers and fields111 * @response_buf: SoundWire response buffer112 * @tx_complete: Tx completion113 * @ports: Data ports114 * @num_ports: Total number of data ports115 * @pcm: PCM streams116 * @registers: Cadence registers117 * @link_up: Link status118 * @msg_count: Messages sent on bus119 * @dai_runtime_array: runtime context for each allocated DAI.120 * @status_update_lock: protect concurrency between interrupt-based and delayed work121 * status update122 */123struct sdw_cdns {124 struct device *dev;125 struct sdw_bus bus;126 unsigned int instance;127 128 u32 ip_offset;129 130 /*131 * The datasheet says the RX FIFO AVAIL can be 2 entries more132 * than the FIFO capacity, so allow for this.133 */134 u32 response_buf[CDNS_MCP_IP_MAX_CMD_LEN + 2];135 136 struct completion tx_complete;137 138 struct sdw_cdns_port *ports;139 int num_ports;140 141 struct sdw_cdns_streams pcm;142 143 int pdi_loopback_source;144 int pdi_loopback_target;145 146 void __iomem *registers;147 148 bool link_up;149 unsigned int msg_count;150 bool interrupt_enabled;151 152 struct work_struct work;153 struct delayed_work attach_dwork;154 155 struct list_head list;156 157 struct sdw_cdns_dai_runtime **dai_runtime_array;158 159 struct mutex status_update_lock; /* add mutual exclusion to sdw_handle_slave_status() */160};161 162#define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus)163 164/* Exported symbols */165 166int sdw_cdns_probe(struct sdw_cdns *cdns);167 168irqreturn_t sdw_cdns_irq(int irq, void *dev_id);169irqreturn_t sdw_cdns_thread(int irq, void *dev_id);170 171int sdw_cdns_init(struct sdw_cdns *cdns);172int sdw_cdns_pdi_init(struct sdw_cdns *cdns,173 struct sdw_cdns_stream_config config);174int sdw_cdns_exit_reset(struct sdw_cdns *cdns);175int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state);176 177bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns);178int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake);179int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset);180 181#ifdef CONFIG_DEBUG_FS182void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root);183#endif184 185struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns,186 struct sdw_cdns_streams *stream,187 u32 ch, u32 dir, int dai_id);188void sdw_cdns_config_stream(struct sdw_cdns *cdns,189 u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);190 191enum sdw_command_response192cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg);193 194enum sdw_command_response195cdns_xfer_msg_defer(struct sdw_bus *bus);196 197u32 cdns_read_ping_status(struct sdw_bus *bus);198 199int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);200 201int cdns_set_sdw_stream(struct snd_soc_dai *dai,202 void *stream, int direction);203 204void sdw_cdns_check_self_clearing_bits(struct sdw_cdns *cdns, const char *string,205 bool initial_delay, int reset_iterations);206 207void sdw_cdns_config_update(struct sdw_cdns *cdns);208int sdw_cdns_config_update_set_wait(struct sdw_cdns *cdns);209 210#endif /* __SDW_CADENCE_H */211