drivers/soundwire/cadence_master.h

   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  */
  20 struct 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  */
  40 struct 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  */
  62 struct 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  */
  85 struct 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  */
 104 struct 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  */
 130 struct 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
 155 int sdw_cdns_probe(struct sdw_cdns *cdns);
 156 extern struct sdw_master_ops sdw_cdns_master_ops;
 157
 158 irqreturn_t sdw_cdns_irq(int irq, void *dev_id);
 159 irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
 160
 161 int sdw_cdns_init(struct sdw_cdns *cdns);
 162 int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
 163                         struct sdw_cdns_stream_config config);
 164 int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns);
 165
 166 int sdw_cdns_get_stream(struct sdw_cdns *cdns,
 167                         struct sdw_cdns_streams *stream,
 168                         u32 ch, u32 dir);
 169 int sdw_cdns_alloc_stream(struct sdw_cdns *cdns,
 170                         struct sdw_cdns_streams *stream,
 171                         struct sdw_cdns_port *port, u32 ch, u32 dir);
 172 void sdw_cdns_config_stream(struct sdw_cdns *cdns, struct sdw_cdns_port *port,
 173                         u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);
 174
 175 void sdw_cdns_shutdown(struct snd_pcm_substream *substream,
 176                                 struct snd_soc_dai *dai);
 177 int sdw_cdns_pcm_set_stream(struct snd_soc_dai *dai,
 178                                 void *stream, int direction);
 179 int sdw_cdns_pdm_set_stream(struct snd_soc_dai *dai,
 180                                 void *stream, int direction);
 181
 182 enum sdw_command_response
 183 cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
 184
 185 enum sdw_command_response
 186 cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg);
 187
 188 enum sdw_command_response
 189 cdns_xfer_msg_defer(struct sdw_bus *bus,
 190                 struct sdw_msg *msg, struct sdw_defer *defer);
 191
 192 enum sdw_command_response
 193 cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
 194
 195 int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);
 196
 197 int cdns_set_sdw_stream(struct snd_soc_dai *dai,
 198                 void *stream, bool pcm, int direction);
 199 #endif /* __SDW_CADENCE_H */