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 #define SDW_CADENCE_GSYNC_KHZ           4 /* 4 kHz */
   9 #define SDW_CADENCE_GSYNC_HZ            (SDW_CADENCE_GSYNC_KHZ * 1000)
  10
  11 /**
  12  * struct sdw_cdns_pdi: PDI (Physical Data Interface) instance
  13  *
  14  * @num: pdi number
  15  * @intel_alh_id: link identifier
  16  * @l_ch_num: low channel for PDI
  17  * @h_ch_num: high channel for PDI
  18  * @ch_count: total channel count for PDI
  19  * @dir: data direction
  20  * @type: stream type, PDM or PCM
  21  */
  22 struct sdw_cdns_pdi {
  23         int num;
  24         int intel_alh_id;
  25         int l_ch_num;
  26         int h_ch_num;
  27         int ch_count;
  28         enum sdw_data_direction dir;
  29         enum sdw_stream_type type;
  30 };
  31
  32 /**
  33  * struct sdw_cdns_streams: Cadence stream data structure
  34  *
  35  * @num_bd: number of bidirectional streams
  36  * @num_in: number of input streams
  37  * @num_out: number of output streams
  38  * @num_ch_bd: number of bidirectional stream channels
  39  * @num_ch_bd: number of input stream channels
  40  * @num_ch_bd: number of output stream channels
  41  * @num_pdi: total number of PDIs
  42  * @bd: bidirectional streams
  43  * @in: input streams
  44  * @out: output streams
  45  */
  46 struct sdw_cdns_streams {
  47         unsigned int num_bd;
  48         unsigned int num_in;
  49         unsigned int num_out;
  50         unsigned int num_ch_bd;
  51         unsigned int num_ch_in;
  52         unsigned int num_ch_out;
  53         unsigned int num_pdi;
  54         struct sdw_cdns_pdi *bd;
  55         struct sdw_cdns_pdi *in;
  56         struct sdw_cdns_pdi *out;
  57 };
  58
  59 /**
  60  * struct sdw_cdns_stream_config: stream configuration
  61  *
  62  * @pcm_bd: number of bidirectional PCM streams supported
  63  * @pcm_in: number of input PCM streams supported
  64  * @pcm_out: number of output PCM streams supported
  65  * @pdm_bd: number of bidirectional PDM streams supported
  66  * @pdm_in: number of input PDM streams supported
  67  * @pdm_out: number of output PDM streams supported
  68  */
  69 struct sdw_cdns_stream_config {
  70         unsigned int pcm_bd;
  71         unsigned int pcm_in;
  72         unsigned int pcm_out;
  73         unsigned int pdm_bd;
  74         unsigned int pdm_in;
  75         unsigned int pdm_out;
  76 };
  77
  78 /**
  79  * struct sdw_cdns_dma_data: Cadence DMA data
  80  *
  81  * @name: SoundWire stream name
  82  * @stream: stream runtime
  83  * @pdi: PDI used for this dai
  84  * @bus: Bus handle
  85  * @stream_type: Stream type
  86  * @link_id: Master link id
  87  * @hw_params: hw_params to be applied in .prepare step
  88  * @suspended: status set when suspended, to be used in .prepare
  89  */
  90 struct sdw_cdns_dma_data {
  91         char *name;
  92         struct sdw_stream_runtime *stream;
  93         struct sdw_cdns_pdi *pdi;
  94         struct sdw_bus *bus;
  95         enum sdw_stream_type stream_type;
  96         int link_id;
  97         struct snd_pcm_hw_params *hw_params;
  98         bool suspended;
  99 };
 100
 101 /**
 102  * struct sdw_cdns - Cadence driver context
 103  * @dev: Linux device
 104  * @bus: Bus handle
 105  * @instance: instance number
 106  * @response_buf: SoundWire response buffer
 107  * @tx_complete: Tx completion
 108  * @defer: Defer pointer
 109  * @ports: Data ports
 110  * @num_ports: Total number of data ports
 111  * @pcm: PCM streams
 112  * @pdm: PDM streams
 113  * @registers: Cadence registers
 114  * @link_up: Link status
 115  * @msg_count: Messages sent on bus
 116  */
 117 struct sdw_cdns {
 118         struct device *dev;
 119         struct sdw_bus bus;
 120         unsigned int instance;
 121
 122         u32 response_buf[0x80];
 123         struct completion tx_complete;
 124         struct sdw_defer *defer;
 125
 126         struct sdw_cdns_port *ports;
 127         int num_ports;
 128
 129         struct sdw_cdns_streams pcm;
 130         struct sdw_cdns_streams pdm;
 131
 132         void __iomem *registers;
 133
 134         bool link_up;
 135         unsigned int msg_count;
 136         bool interrupt_enabled;
 137
 138         struct work_struct work;
 139
 140         struct list_head list;
 141 };
 142
 143 #define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus)
 144
 145 /* Exported symbols */
 146
 147 int sdw_cdns_probe(struct sdw_cdns *cdns);
 148 extern struct sdw_master_ops sdw_cdns_master_ops;
 149
 150 irqreturn_t sdw_cdns_irq(int irq, void *dev_id);
 151 irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
 152
 153 int sdw_cdns_init(struct sdw_cdns *cdns);
 154 int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
 155                       struct sdw_cdns_stream_config config);
 156 int sdw_cdns_exit_reset(struct sdw_cdns *cdns);
 157 int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state);
 158
 159 bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns);
 160 int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake);
 161 int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset);
 162
 163 #ifdef CONFIG_DEBUG_FS
 164 void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root);
 165 #endif
 166
 167 struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns,
 168                                         struct sdw_cdns_streams *stream,
 169                                         u32 ch, u32 dir, int dai_id);
 170 void sdw_cdns_config_stream(struct sdw_cdns *cdns,
 171                             u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);
 172
 173 enum sdw_command_response
 174 cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
 175
 176 enum sdw_command_response
 177 cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg);
 178
 179 enum sdw_command_response
 180 cdns_xfer_msg_defer(struct sdw_bus *bus,
 181                     struct sdw_msg *msg, struct sdw_defer *defer);
 182
 183 enum sdw_command_response
 184 cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
 185
 186 int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);
 187
 188 int cdns_set_sdw_stream(struct snd_soc_dai *dai,
 189                         void *stream, bool pcm, int direction);
 190 #endif /* __SDW_CADENCE_H */