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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/soundwire/bus.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/soundwire/bus.h')
-rw-r--r--drivers/soundwire/bus.h214
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/soundwire/bus.h b/drivers/soundwire/bus.h
new file mode 100644
index 0000000000..fda6b24ac2
--- /dev/null
+++ b/drivers/soundwire/bus.h
@@ -0,0 +1,214 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/* Copyright(c) 2015-17 Intel Corporation. */
+
+#ifndef __SDW_BUS_H
+#define __SDW_BUS_H
+
+#define DEFAULT_BANK_SWITCH_TIMEOUT 3000
+#define DEFAULT_PROBE_TIMEOUT 2000
+
+u64 sdw_dmi_override_adr(struct sdw_bus *bus, u64 addr);
+
+#if IS_ENABLED(CONFIG_ACPI)
+int sdw_acpi_find_slaves(struct sdw_bus *bus);
+#else
+static inline int sdw_acpi_find_slaves(struct sdw_bus *bus)
+{
+ return -ENOTSUPP;
+}
+#endif
+
+int sdw_of_find_slaves(struct sdw_bus *bus);
+void sdw_extract_slave_id(struct sdw_bus *bus,
+ u64 addr, struct sdw_slave_id *id);
+int sdw_slave_add(struct sdw_bus *bus, struct sdw_slave_id *id,
+ struct fwnode_handle *fwnode);
+int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
+ struct fwnode_handle *fwnode);
+int sdw_master_device_del(struct sdw_bus *bus);
+
+#ifdef CONFIG_DEBUG_FS
+void sdw_bus_debugfs_init(struct sdw_bus *bus);
+void sdw_bus_debugfs_exit(struct sdw_bus *bus);
+void sdw_slave_debugfs_init(struct sdw_slave *slave);
+void sdw_slave_debugfs_exit(struct sdw_slave *slave);
+void sdw_debugfs_init(void);
+void sdw_debugfs_exit(void);
+#else
+static inline void sdw_bus_debugfs_init(struct sdw_bus *bus) {}
+static inline void sdw_bus_debugfs_exit(struct sdw_bus *bus) {}
+static inline void sdw_slave_debugfs_init(struct sdw_slave *slave) {}
+static inline void sdw_slave_debugfs_exit(struct sdw_slave *slave) {}
+static inline void sdw_debugfs_init(void) {}
+static inline void sdw_debugfs_exit(void) {}
+#endif
+
+enum {
+ SDW_MSG_FLAG_READ = 0,
+ SDW_MSG_FLAG_WRITE,
+};
+
+/**
+ * struct sdw_msg - Message structure
+ * @addr: Register address accessed in the Slave
+ * @len: number of messages
+ * @dev_num: Slave device number
+ * @addr_page1: SCP address page 1 Slave register
+ * @addr_page2: SCP address page 2 Slave register
+ * @flags: transfer flags, indicate if xfer is read or write
+ * @buf: message data buffer
+ * @ssp_sync: Send message at SSP (Stream Synchronization Point)
+ * @page: address requires paging
+ */
+struct sdw_msg {
+ u16 addr;
+ u16 len;
+ u8 dev_num;
+ u8 addr_page1;
+ u8 addr_page2;
+ u8 flags;
+ u8 *buf;
+ bool ssp_sync;
+ bool page;
+};
+
+#define SDW_DOUBLE_RATE_FACTOR 2
+#define SDW_STRM_RATE_GROUPING 1
+
+extern int sdw_rows[SDW_FRAME_ROWS];
+extern int sdw_cols[SDW_FRAME_COLS];
+
+int sdw_find_row_index(int row);
+int sdw_find_col_index(int col);
+
+/**
+ * sdw_port_runtime: Runtime port parameters for Master or Slave
+ *
+ * @num: Port number. For audio streams, valid port number ranges from
+ * [1,14]
+ * @ch_mask: Channel mask
+ * @transport_params: Transport parameters
+ * @port_params: Port parameters
+ * @port_node: List node for Master or Slave port_list
+ *
+ * SoundWire spec has no mention of ports for Master interface but the
+ * concept is logically extended.
+ */
+struct sdw_port_runtime {
+ int num;
+ int ch_mask;
+ struct sdw_transport_params transport_params;
+ struct sdw_port_params port_params;
+ struct list_head port_node;
+};
+
+/**
+ * sdw_slave_runtime: Runtime Stream parameters for Slave
+ *
+ * @slave: Slave handle
+ * @direction: Data direction for Slave
+ * @ch_count: Number of channels handled by the Slave for
+ * this stream
+ * @m_rt_node: sdw_master_runtime list node
+ * @port_list: List of Slave Ports configured for this stream
+ */
+struct sdw_slave_runtime {
+ struct sdw_slave *slave;
+ enum sdw_data_direction direction;
+ unsigned int ch_count;
+ struct list_head m_rt_node;
+ struct list_head port_list;
+};
+
+/**
+ * sdw_master_runtime: Runtime stream parameters for Master
+ *
+ * @bus: Bus handle
+ * @stream: Stream runtime handle
+ * @direction: Data direction for Master
+ * @ch_count: Number of channels handled by the Master for
+ * this stream, can be zero.
+ * @slave_rt_list: Slave runtime list
+ * @port_list: List of Master Ports configured for this stream, can be zero.
+ * @stream_node: sdw_stream_runtime master_list node
+ * @bus_node: sdw_bus m_rt_list node
+ */
+struct sdw_master_runtime {
+ struct sdw_bus *bus;
+ struct sdw_stream_runtime *stream;
+ enum sdw_data_direction direction;
+ unsigned int ch_count;
+ struct list_head slave_rt_list;
+ struct list_head port_list;
+ struct list_head stream_node;
+ struct list_head bus_node;
+};
+
+struct sdw_transport_data {
+ int hstart;
+ int hstop;
+ int block_offset;
+ int sub_block_offset;
+};
+
+struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
+ enum sdw_data_direction direction,
+ unsigned int port_num);
+int sdw_configure_dpn_intr(struct sdw_slave *slave, int port,
+ bool enable, int mask);
+
+int sdw_transfer(struct sdw_bus *bus, struct sdw_msg *msg);
+int sdw_transfer_defer(struct sdw_bus *bus, struct sdw_msg *msg);
+
+#define SDW_READ_INTR_CLEAR_RETRY 10
+
+int sdw_fill_msg(struct sdw_msg *msg, struct sdw_slave *slave,
+ u32 addr, size_t count, u16 dev_num, u8 flags, u8 *buf);
+
+/* Fill transport parameter data structure */
+static inline void sdw_fill_xport_params(struct sdw_transport_params *params,
+ int port_num, bool grp_ctrl_valid,
+ int grp_ctrl, int sample_int,
+ int off1, int off2,
+ int hstart, int hstop,
+ int pack_mode, int lane_ctrl)
+{
+ params->port_num = port_num;
+ params->blk_grp_ctrl_valid = grp_ctrl_valid;
+ params->blk_grp_ctrl = grp_ctrl;
+ params->sample_interval = sample_int;
+ params->offset1 = off1;
+ params->offset2 = off2;
+ params->hstart = hstart;
+ params->hstop = hstop;
+ params->blk_pkg_mode = pack_mode;
+ params->lane_ctrl = lane_ctrl;
+}
+
+/* Fill port parameter data structure */
+static inline void sdw_fill_port_params(struct sdw_port_params *params,
+ int port_num, int bps,
+ int flow_mode, int data_mode)
+{
+ params->num = port_num;
+ params->bps = bps;
+ params->flow_mode = flow_mode;
+ params->data_mode = data_mode;
+}
+
+/* broadcast read/write for tests */
+int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr);
+int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value);
+
+/*
+ * At the moment we only track Master-initiated hw_reset.
+ * Additional fields can be added as needed
+ */
+#define SDW_UNATTACH_REQUEST_MASTER_RESET BIT(0)
+
+void sdw_clear_slave_status(struct sdw_bus *bus, u32 request);
+int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size);
+void sdw_compute_slave_ports(struct sdw_master_runtime *m_rt,
+ struct sdw_transport_data *t_data);
+
+#endif /* __SDW_BUS_H */