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, (only PCM supported) 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 */ 66 struct sdw_cdns_stream_config { 67 unsigned int pcm_bd; 68 unsigned int pcm_in; 69 unsigned int pcm_out; 70 }; 71 72 /** 73 * struct sdw_cdns_dai_runtime: Cadence DAI runtime data 74 * 75 * @name: SoundWire stream name 76 * @stream: stream runtime 77 * @pdi: PDI used for this dai 78 * @bus: Bus handle 79 * @stream_type: Stream type 80 * @link_id: Master link id 81 * @hw_params: hw_params to be applied in .prepare step 82 * @suspended: status set when suspended, to be used in .prepare 83 * @paused: status set in .trigger, to be used in suspend 84 * @direction: stream direction 85 */ 86 struct sdw_cdns_dai_runtime { 87 char *name; 88 struct sdw_stream_runtime *stream; 89 struct sdw_cdns_pdi *pdi; 90 struct sdw_bus *bus; 91 enum sdw_stream_type stream_type; 92 int link_id; 93 struct snd_pcm_hw_params *hw_params; 94 bool suspended; 95 bool paused; 96 int direction; 97 }; 98 99 /** 100 * struct sdw_cdns - Cadence driver context 101 * @dev: Linux device 102 * @bus: Bus handle 103 * @instance: instance number 104 * @response_buf: SoundWire response buffer 105 * @tx_complete: Tx completion 106 * @defer: Defer pointer 107 * @ports: Data ports 108 * @num_ports: Total number of data ports 109 * @pcm: PCM streams 110 * @registers: Cadence registers 111 * @link_up: Link status 112 * @msg_count: Messages sent on bus 113 * @dai_runtime_array: runtime context for each allocated DAI. 114 */ 115 struct sdw_cdns { 116 struct device *dev; 117 struct sdw_bus bus; 118 unsigned int instance; 119 120 u32 response_buf[0x80]; 121 struct completion tx_complete; 122 struct sdw_defer *defer; 123 124 struct sdw_cdns_port *ports; 125 int num_ports; 126 127 struct sdw_cdns_streams pcm; 128 129 int pdi_loopback_source; 130 int pdi_loopback_target; 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 struct sdw_cdns_dai_runtime **dai_runtime_array; 143 }; 144 145 #define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus) 146 147 /* Exported symbols */ 148 149 int sdw_cdns_probe(struct sdw_cdns *cdns); 150 extern struct sdw_master_ops sdw_cdns_master_ops; 151 152 irqreturn_t sdw_cdns_irq(int irq, void *dev_id); 153 irqreturn_t sdw_cdns_thread(int irq, void *dev_id); 154 155 int sdw_cdns_init(struct sdw_cdns *cdns); 156 int sdw_cdns_pdi_init(struct sdw_cdns *cdns, 157 struct sdw_cdns_stream_config config); 158 int sdw_cdns_exit_reset(struct sdw_cdns *cdns); 159 int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state); 160 161 bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns); 162 int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake); 163 int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset); 164 165 #ifdef CONFIG_DEBUG_FS 166 void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root); 167 #endif 168 169 struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns, 170 struct sdw_cdns_streams *stream, 171 u32 ch, u32 dir, int dai_id); 172 void sdw_cdns_config_stream(struct sdw_cdns *cdns, 173 u32 ch, u32 dir, struct sdw_cdns_pdi *pdi); 174 175 enum sdw_command_response 176 cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num); 177 178 enum sdw_command_response 179 cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg); 180 181 enum sdw_command_response 182 cdns_xfer_msg_defer(struct sdw_bus *bus, 183 struct sdw_msg *msg, struct sdw_defer *defer); 184 185 u32 cdns_read_ping_status(struct sdw_bus *bus); 186 187 int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params); 188 189 int cdns_set_sdw_stream(struct snd_soc_dai *dai, 190 void *stream, int direction); 191 192 void sdw_cdns_check_self_clearing_bits(struct sdw_cdns *cdns, const char *string, 193 bool initial_delay, int reset_iterations); 194 195 #endif /* __SDW_CADENCE_H */ 196