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