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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/soundwire/cadence_master.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/soundwire/cadence_master.h')
-rw-r--r--drivers/soundwire/cadence_master.h199
1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h
new file mode 100644
index 000000000..fea3a9055
--- /dev/null
+++ b/drivers/soundwire/cadence_master.h
@@ -0,0 +1,199 @@
+/* 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
+
+/**
+ * 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
+ */
+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;
+};
+
+/**
+ * struct sdw_cdns - Cadence driver context
+ * @dev: Linux device
+ * @bus: Bus handle
+ * @instance: instance number
+ * @response_buf: SoundWire response buffer
+ * @tx_complete: Tx completion
+ * @defer: Defer pointer
+ * @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
+ */
+struct sdw_cdns {
+ struct device *dev;
+ struct sdw_bus bus;
+ unsigned int instance;
+
+ /*
+ * 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_defer *defer;
+
+ 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 list_head list;
+};
+
+#define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus)
+
+/* Exported symbols */
+
+int sdw_cdns_probe(struct sdw_cdns *cdns);
+extern struct sdw_master_ops sdw_cdns_master_ops;
+
+irqreturn_t sdw_cdns_irq(int irq, void *dev_id);
+irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
+
+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_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
+
+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,
+ struct sdw_msg *msg, struct sdw_defer *defer);
+
+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);
+
+#endif /* __SDW_CADENCE_H */