| /* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */ |
| /* Copyright(c) 2015-17 Intel Corporation. */ |
| #include <sound/soc.h> |
| |
| #ifndef __SDW_CADENCE_H |
| #define __SDW_CADENCE_H |
| |
| #define SDW_CADENCE_GSYNC_KHZ 4 /* 4 kHz */ |
| #define SDW_CADENCE_GSYNC_HZ (SDW_CADENCE_GSYNC_KHZ * 1000) |
| |
| /* |
| * The Cadence IP supports up to 32 entries in the FIFO, though implementations |
| * can configure the IP to have a smaller FIFO. |
| */ |
| #define CDNS_MCP_IP_MAX_CMD_LEN 32 |
| |
| #define SDW_CADENCE_MCP_IP_OFFSET 0x4000 |
| |
| /** |
| * struct sdw_cdns_pdi: PDI (Physical Data Interface) instance |
| * |
| * @num: pdi number |
| * @intel_alh_id: link identifier |
| * @l_ch_num: low channel for PDI |
| * @h_ch_num: high channel for PDI |
| * @ch_count: total channel count for PDI |
| * @dir: data direction |
| * @type: stream type, (only PCM supported) |
| */ |
| struct sdw_cdns_pdi { |
| int num; |
| int intel_alh_id; |
| int l_ch_num; |
| int h_ch_num; |
| int ch_count; |
| enum sdw_data_direction dir; |
| enum sdw_stream_type type; |
| }; |
| |
| /** |
| * struct sdw_cdns_streams: Cadence stream data structure |
| * |
| * @num_bd: number of bidirectional streams |
| * @num_in: number of input streams |
| * @num_out: number of output streams |
| * @num_ch_bd: number of bidirectional stream channels |
| * @num_ch_bd: number of input stream channels |
| * @num_ch_bd: number of output stream channels |
| * @num_pdi: total number of PDIs |
| * @bd: bidirectional streams |
| * @in: input streams |
| * @out: output streams |
| */ |
| struct sdw_cdns_streams { |
| unsigned int num_bd; |
| unsigned int num_in; |
| unsigned int num_out; |
| unsigned int num_ch_bd; |
| unsigned int num_ch_in; |
| unsigned int num_ch_out; |
| unsigned int num_pdi; |
| struct sdw_cdns_pdi *bd; |
| struct sdw_cdns_pdi *in; |
| struct sdw_cdns_pdi *out; |
| }; |
| |
| /** |
| * struct sdw_cdns_stream_config: stream configuration |
| * |
| * @pcm_bd: number of bidirectional PCM streams supported |
| * @pcm_in: number of input PCM streams supported |
| * @pcm_out: number of output PCM streams supported |
| */ |
| struct sdw_cdns_stream_config { |
| unsigned int pcm_bd; |
| unsigned int pcm_in; |
| unsigned int pcm_out; |
| }; |
| |
| /** |
| * struct sdw_cdns_dai_runtime: Cadence DAI runtime data |
| * |
| * @name: SoundWire stream name |
| * @stream: stream runtime |
| * @pdi: PDI used for this dai |
| * @bus: Bus handle |
| * @stream_type: Stream type |
| * @link_id: Master link id |
| * @suspended: status set when suspended, to be used in .prepare |
| * @paused: status set in .trigger, to be used in suspend |
| * @direction: stream direction |
| */ |
| struct sdw_cdns_dai_runtime { |
| char *name; |
| struct sdw_stream_runtime *stream; |
| struct sdw_cdns_pdi *pdi; |
| struct sdw_bus *bus; |
| enum sdw_stream_type stream_type; |
| int link_id; |
| bool suspended; |
| bool paused; |
| int direction; |
| }; |
| |
| /** |
| * struct sdw_cdns - Cadence driver context |
| * @dev: Linux device |
| * @bus: Bus handle |
| * @instance: instance number |
| * @ip_offset: version-dependent offset to access IP_MCP registers and fields |
| * @response_buf: SoundWire response buffer |
| * @tx_complete: Tx completion |
| * @ports: Data ports |
| * @num_ports: Total number of data ports |
| * @pcm: PCM streams |
| * @registers: Cadence registers |
| * @link_up: Link status |
| * @msg_count: Messages sent on bus |
| * @dai_runtime_array: runtime context for each allocated DAI. |
| * @status_update_lock: protect concurrency between interrupt-based and delayed work |
| * status update |
| */ |
| struct sdw_cdns { |
| struct device *dev; |
| struct sdw_bus bus; |
| unsigned int instance; |
| |
| u32 ip_offset; |
| |
| /* |
| * The datasheet says the RX FIFO AVAIL can be 2 entries more |
| * than the FIFO capacity, so allow for this. |
| */ |
| u32 response_buf[CDNS_MCP_IP_MAX_CMD_LEN + 2]; |
| |
| struct completion tx_complete; |
| |
| struct sdw_cdns_port *ports; |
| int num_ports; |
| |
| struct sdw_cdns_streams pcm; |
| |
| int pdi_loopback_source; |
| int pdi_loopback_target; |
| |
| void __iomem *registers; |
| |
| bool link_up; |
| unsigned int msg_count; |
| bool interrupt_enabled; |
| |
| struct work_struct work; |
| struct delayed_work attach_dwork; |
| |
| struct list_head list; |
| |
| struct sdw_cdns_dai_runtime **dai_runtime_array; |
| |
| struct mutex status_update_lock; /* add mutual exclusion to sdw_handle_slave_status() */ |
| }; |
| |
| #define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus) |
| |
| /* Exported symbols */ |
| |
| int sdw_cdns_probe(struct sdw_cdns *cdns); |
| |
| irqreturn_t sdw_cdns_irq(int irq, void *dev_id); |
| irqreturn_t sdw_cdns_thread(int irq, void *dev_id); |
| |
| int sdw_cdns_soft_reset(struct sdw_cdns *cdns); |
| int sdw_cdns_init(struct sdw_cdns *cdns); |
| int sdw_cdns_pdi_init(struct sdw_cdns *cdns, |
| struct sdw_cdns_stream_config config); |
| int sdw_cdns_exit_reset(struct sdw_cdns *cdns); |
| int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state); |
| |
| bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns); |
| int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake); |
| int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset); |
| |
| #ifdef CONFIG_DEBUG_FS |
| void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root); |
| #endif |
| |
| struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns, |
| struct sdw_cdns_streams *stream, |
| u32 ch, u32 dir, int dai_id); |
| void sdw_cdns_config_stream(struct sdw_cdns *cdns, |
| u32 ch, u32 dir, struct sdw_cdns_pdi *pdi); |
| |
| enum sdw_command_response |
| cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg); |
| |
| enum sdw_command_response |
| cdns_xfer_msg_defer(struct sdw_bus *bus); |
| |
| u32 cdns_read_ping_status(struct sdw_bus *bus); |
| |
| int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params); |
| |
| int cdns_set_sdw_stream(struct snd_soc_dai *dai, |
| void *stream, int direction); |
| |
| void sdw_cdns_check_self_clearing_bits(struct sdw_cdns *cdns, const char *string, |
| bool initial_delay, int reset_iterations); |
| |
| void sdw_cdns_config_update(struct sdw_cdns *cdns); |
| int sdw_cdns_config_update_set_wait(struct sdw_cdns *cdns); |
| |
| /* SoundWire BPT/BRA helpers to format data */ |
| int sdw_cdns_bpt_find_buffer_sizes(int command, /* 0: write, 1: read */ |
| int row, int col, unsigned int data_bytes, |
| unsigned int requested_bytes_per_frame, |
| unsigned int *data_per_frame, unsigned int *pdi0_buffer_size, |
| unsigned int *pdi1_buffer_size, unsigned int *num_frames); |
| |
| int sdw_cdns_prepare_write_dma_buffer(u8 dev_num, u32 start_register, u8 *data, int data_size, |
| int data_per_frame, u8 *dma_buffer, int dma_buffer_size, |
| int *dma_buffer_total_bytes); |
| |
| int sdw_cdns_prepare_read_dma_buffer(u8 dev_num, u32 start_register, int data_size, |
| int data_per_frame, u8 *dma_buffer, int dma_buffer_size, |
| int *dma_buffer_total_bytes); |
| |
| int sdw_cdns_check_write_response(struct device *dev, u8 *dma_buffer, |
| int dma_buffer_size, int num_frames); |
| |
| int sdw_cdns_check_read_response(struct device *dev, u8 *dma_buffer, int dma_buffer_size, |
| u8 *buffer, int buffer_size, int num_frames, int data_per_frame); |
| #endif /* __SDW_CADENCE_H */ |
