e0731a6503
[ Upstream commit 49ea07d33d ]
Multiple changes squashed in single patch to avoid tick-tock effect
and avoid breaking compilation/bisect
1. Per the hardware documentation, all changes to MCP_CONFIG,
MCP_CONTROL, MCP_CMDCTRL and MCP_PHYCTRL need to be validated with a
self-clearing write to MCP_CONFIG_UPDATE. Add a helper and do the
update when the CONFIG is changed.
2. Move interrupt enable after interrupt handler registration
3. Add a new helper to start the hardware bus reset with maximum duration
to make sure the Slave(s) correctly detect the reset pattern and to
ensure electrical conflicts can be resolved.
4. flush command FIFOs
Better error handling will be provided after interrupt disable is
provided in follow-up patches.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191022235448.17586-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
203 lines
5.1 KiB
C
203 lines
5.1 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
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/* Copyright(c) 2015-17 Intel Corporation. */
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#include <sound/soc.h>
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#ifndef __SDW_CADENCE_H
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#define __SDW_CADENCE_H
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/**
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* struct sdw_cdns_pdi: PDI (Physical Data Interface) instance
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*
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* @assigned: pdi assigned
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* @num: pdi number
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* @intel_alh_id: link identifier
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* @l_ch_num: low channel for PDI
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* @h_ch_num: high channel for PDI
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* @ch_count: total channel count for PDI
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* @dir: data direction
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* @type: stream type, PDM or PCM
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*/
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struct sdw_cdns_pdi {
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bool assigned;
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int num;
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int intel_alh_id;
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int l_ch_num;
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int h_ch_num;
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int ch_count;
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enum sdw_data_direction dir;
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enum sdw_stream_type type;
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};
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/**
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* struct sdw_cdns_port: Cadence port structure
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*
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* @num: port number
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* @assigned: port assigned
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* @ch: channel count
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* @direction: data port direction
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* @pdi: pdi for this port
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*/
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struct sdw_cdns_port {
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unsigned int num;
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bool assigned;
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unsigned int ch;
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enum sdw_data_direction direction;
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struct sdw_cdns_pdi *pdi;
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};
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/**
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* struct sdw_cdns_streams: Cadence stream data structure
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*
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* @num_bd: number of bidirectional streams
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* @num_in: number of input streams
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* @num_out: number of output streams
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* @num_ch_bd: number of bidirectional stream channels
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* @num_ch_bd: number of input stream channels
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* @num_ch_bd: number of output stream channels
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* @num_pdi: total number of PDIs
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* @bd: bidirectional streams
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* @in: input streams
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* @out: output streams
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*/
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struct sdw_cdns_streams {
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unsigned int num_bd;
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unsigned int num_in;
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unsigned int num_out;
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unsigned int num_ch_bd;
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unsigned int num_ch_in;
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unsigned int num_ch_out;
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unsigned int num_pdi;
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struct sdw_cdns_pdi *bd;
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struct sdw_cdns_pdi *in;
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struct sdw_cdns_pdi *out;
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};
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/**
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* struct sdw_cdns_stream_config: stream configuration
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*
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* @pcm_bd: number of bidirectional PCM streams supported
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* @pcm_in: number of input PCM streams supported
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* @pcm_out: number of output PCM streams supported
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* @pdm_bd: number of bidirectional PDM streams supported
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* @pdm_in: number of input PDM streams supported
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* @pdm_out: number of output PDM streams supported
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*/
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struct sdw_cdns_stream_config {
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unsigned int pcm_bd;
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unsigned int pcm_in;
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unsigned int pcm_out;
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unsigned int pdm_bd;
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unsigned int pdm_in;
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unsigned int pdm_out;
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};
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/**
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* struct sdw_cdns_dma_data: Cadence DMA data
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*
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* @name: SoundWire stream name
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* @nr_ports: Number of ports
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* @port: Ports
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* @bus: Bus handle
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* @stream_type: Stream type
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* @link_id: Master link id
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*/
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struct sdw_cdns_dma_data {
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char *name;
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struct sdw_stream_runtime *stream;
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int nr_ports;
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struct sdw_cdns_port **port;
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struct sdw_bus *bus;
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enum sdw_stream_type stream_type;
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int link_id;
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};
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/**
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* struct sdw_cdns - Cadence driver context
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* @dev: Linux device
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* @bus: Bus handle
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* @instance: instance number
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* @response_buf: SoundWire response buffer
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* @tx_complete: Tx completion
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* @defer: Defer pointer
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* @ports: Data ports
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* @num_ports: Total number of data ports
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* @pcm: PCM streams
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* @pdm: PDM streams
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* @registers: Cadence registers
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* @link_up: Link status
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* @msg_count: Messages sent on bus
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*/
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struct sdw_cdns {
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struct device *dev;
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struct sdw_bus bus;
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unsigned int instance;
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u32 response_buf[0x80];
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struct completion tx_complete;
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struct sdw_defer *defer;
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struct sdw_cdns_port *ports;
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int num_ports;
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struct sdw_cdns_streams pcm;
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struct sdw_cdns_streams pdm;
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void __iomem *registers;
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bool link_up;
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unsigned int msg_count;
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};
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#define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus)
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/* Exported symbols */
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int sdw_cdns_probe(struct sdw_cdns *cdns);
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extern struct sdw_master_ops sdw_cdns_master_ops;
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irqreturn_t sdw_cdns_irq(int irq, void *dev_id);
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irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
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int sdw_cdns_init(struct sdw_cdns *cdns);
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int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
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struct sdw_cdns_stream_config config);
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int sdw_cdns_exit_reset(struct sdw_cdns *cdns);
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int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns);
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#ifdef CONFIG_DEBUG_FS
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void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root);
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#endif
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int sdw_cdns_get_stream(struct sdw_cdns *cdns,
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struct sdw_cdns_streams *stream,
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u32 ch, u32 dir);
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int sdw_cdns_alloc_stream(struct sdw_cdns *cdns,
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struct sdw_cdns_streams *stream,
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struct sdw_cdns_port *port, u32 ch, u32 dir);
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void sdw_cdns_config_stream(struct sdw_cdns *cdns, struct sdw_cdns_port *port,
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u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);
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int sdw_cdns_pcm_set_stream(struct snd_soc_dai *dai,
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void *stream, int direction);
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int sdw_cdns_pdm_set_stream(struct snd_soc_dai *dai,
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void *stream, int direction);
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enum sdw_command_response
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cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
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enum sdw_command_response
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cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg);
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enum sdw_command_response
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cdns_xfer_msg_defer(struct sdw_bus *bus,
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struct sdw_msg *msg, struct sdw_defer *defer);
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enum sdw_command_response
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cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
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int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);
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int cdns_set_sdw_stream(struct snd_soc_dai *dai,
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void *stream, bool pcm, int direction);
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#endif /* __SDW_CADENCE_H */
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