linux/drivers/soundwire/cadence_master.h
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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_H
   6#define __SDW_CADENCE_H
   7
   8/**
   9 * struct sdw_cdns_pdi: PDI (Physical Data Interface) instance
  10 *
  11 * @assigned: pdi assigned
  12 * @num: pdi number
  13 * @intel_alh_id: link identifier
  14 * @l_ch_num: low channel for PDI
  15 * @h_ch_num: high channel for PDI
  16 * @ch_count: total channel count for PDI
  17 * @dir: data direction
  18 * @type: stream type, PDM or PCM
  19 */
  20struct sdw_cdns_pdi {
  21        bool assigned;
  22        int num;
  23        int intel_alh_id;
  24        int l_ch_num;
  25        int h_ch_num;
  26        int ch_count;
  27        enum sdw_data_direction dir;
  28        enum sdw_stream_type type;
  29};
  30
  31/**
  32 * struct sdw_cdns_port: Cadence port structure
  33 *
  34 * @num: port number
  35 * @assigned: port assigned
  36 * @ch: channel count
  37 * @direction: data port direction
  38 * @pdi: pdi for this port
  39 */
  40struct sdw_cdns_port {
  41        unsigned int num;
  42        bool assigned;
  43        unsigned int ch;
  44        enum sdw_data_direction direction;
  45        struct sdw_cdns_pdi *pdi;
  46};
  47
  48/**
  49 * struct sdw_cdns_streams: Cadence stream data structure
  50 *
  51 * @num_bd: number of bidirectional streams
  52 * @num_in: number of input streams
  53 * @num_out: number of output streams
  54 * @num_ch_bd: number of bidirectional stream channels
  55 * @num_ch_bd: number of input stream channels
  56 * @num_ch_bd: number of output stream channels
  57 * @num_pdi: total number of PDIs
  58 * @bd: bidirectional streams
  59 * @in: input streams
  60 * @out: output streams
  61 */
  62struct sdw_cdns_streams {
  63        unsigned int num_bd;
  64        unsigned int num_in;
  65        unsigned int num_out;
  66        unsigned int num_ch_bd;
  67        unsigned int num_ch_in;
  68        unsigned int num_ch_out;
  69        unsigned int num_pdi;
  70        struct sdw_cdns_pdi *bd;
  71        struct sdw_cdns_pdi *in;
  72        struct sdw_cdns_pdi *out;
  73};
  74
  75/**
  76 * struct sdw_cdns_stream_config: stream configuration
  77 *
  78 * @pcm_bd: number of bidirectional PCM streams supported
  79 * @pcm_in: number of input PCM streams supported
  80 * @pcm_out: number of output PCM streams supported
  81 * @pdm_bd: number of bidirectional PDM streams supported
  82 * @pdm_in: number of input PDM streams supported
  83 * @pdm_out: number of output PDM streams supported
  84 */
  85struct sdw_cdns_stream_config {
  86        unsigned int pcm_bd;
  87        unsigned int pcm_in;
  88        unsigned int pcm_out;
  89        unsigned int pdm_bd;
  90        unsigned int pdm_in;
  91        unsigned int pdm_out;
  92};
  93
  94/**
  95 * struct sdw_cdns_dma_data: Cadence DMA data
  96 *
  97 * @name: SoundWire stream name
  98 * @nr_ports: Number of ports
  99 * @port: Ports
 100 * @bus: Bus handle
 101 * @stream_type: Stream type
 102 * @link_id: Master link id
 103 */
 104struct sdw_cdns_dma_data {
 105        char *name;
 106        struct sdw_stream_runtime *stream;
 107        int nr_ports;
 108        struct sdw_cdns_port **port;
 109        struct sdw_bus *bus;
 110        enum sdw_stream_type stream_type;
 111        int link_id;
 112};
 113
 114/**
 115 * struct sdw_cdns - Cadence driver context
 116 * @dev: Linux device
 117 * @bus: Bus handle
 118 * @instance: instance number
 119 * @response_buf: SoundWire response buffer
 120 * @tx_complete: Tx completion
 121 * @defer: Defer pointer
 122 * @ports: Data ports
 123 * @num_ports: Total number of data ports
 124 * @pcm: PCM streams
 125 * @pdm: PDM streams
 126 * @registers: Cadence registers
 127 * @link_up: Link status
 128 * @msg_count: Messages sent on bus
 129 */
 130struct sdw_cdns {
 131        struct device *dev;
 132        struct sdw_bus bus;
 133        unsigned int instance;
 134
 135        u32 response_buf[0x80];
 136        struct completion tx_complete;
 137        struct sdw_defer *defer;
 138
 139        struct sdw_cdns_port *ports;
 140        int num_ports;
 141
 142        struct sdw_cdns_streams pcm;
 143        struct sdw_cdns_streams pdm;
 144
 145        void __iomem *registers;
 146
 147        bool link_up;
 148        unsigned int msg_count;
 149};
 150
 151#define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus)
 152
 153/* Exported symbols */
 154
 155int sdw_cdns_probe(struct sdw_cdns *cdns);
 156extern struct sdw_master_ops sdw_cdns_master_ops;
 157
 158irqreturn_t sdw_cdns_irq(int irq, void *dev_id);
 159irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
 160
 161int sdw_cdns_init(struct sdw_cdns *cdns);
 162int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
 163                        struct sdw_cdns_stream_config config);
 164int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns);
 165
 166int sdw_cdns_get_stream(struct sdw_cdns *cdns,
 167                        struct sdw_cdns_streams *stream,
 168                        u32 ch, u32 dir);
 169int sdw_cdns_alloc_stream(struct sdw_cdns *cdns,
 170                        struct sdw_cdns_streams *stream,
 171                        struct sdw_cdns_port *port, u32 ch, u32 dir);
 172void sdw_cdns_config_stream(struct sdw_cdns *cdns, struct sdw_cdns_port *port,
 173                        u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);
 174
 175void sdw_cdns_shutdown(struct snd_pcm_substream *substream,
 176                                struct snd_soc_dai *dai);
 177int sdw_cdns_pcm_set_stream(struct snd_soc_dai *dai,
 178                                void *stream, int direction);
 179int sdw_cdns_pdm_set_stream(struct snd_soc_dai *dai,
 180                                void *stream, int direction);
 181
 182enum sdw_command_response
 183cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
 184
 185enum sdw_command_response
 186cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg);
 187
 188enum sdw_command_response
 189cdns_xfer_msg_defer(struct sdw_bus *bus,
 190                struct sdw_msg *msg, struct sdw_defer *defer);
 191
 192enum sdw_command_response
 193cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
 194
 195int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);
 196
 197int cdns_set_sdw_stream(struct snd_soc_dai *dai,
 198                void *stream, bool pcm, int direction);
 199#endif /* __SDW_CADENCE_H */
 200