169 lines
4.4 KiB
C
169 lines
4.4 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
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/*
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* Copyright (C) 2023-24 Advanced Micro Devices, Inc. All rights reserved.
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*/
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#ifndef __SDW_AMD_H
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#define __SDW_AMD_H
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#include <linux/acpi.h>
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#include <linux/soundwire/sdw.h>
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/* AMD pm_runtime quirk definitions */
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/*
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* Force the clock to stop(ClockStopMode0) when suspend callback
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* is invoked.
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*/
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#define AMD_SDW_CLK_STOP_MODE 1
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/*
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* Stop the bus when runtime suspend/system level suspend callback
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* is invoked. If set, a complete bus reset and re-enumeration will
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* be performed when the bus restarts. In-band wake interrupts are
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* not supported in this mode.
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*/
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#define AMD_SDW_POWER_OFF_MODE 2
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#define ACP_SDW0 0
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#define ACP_SDW1 1
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#define AMD_SDW_MAX_MANAGER_COUNT 2
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struct acp_sdw_pdata {
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u16 instance;
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/* mutex to protect acp common register access */
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struct mutex *acp_sdw_lock;
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};
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/**
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* struct sdw_amd_dai_runtime: AMD sdw dai runtime data
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*
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* @name: SoundWire stream name
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* @stream: stream runtime
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* @bus: Bus handle
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* @stream_type: Stream type
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*/
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struct sdw_amd_dai_runtime {
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char *name;
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struct sdw_stream_runtime *stream;
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struct sdw_bus *bus;
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enum sdw_stream_type stream_type;
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};
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/**
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* struct amd_sdw_manager - amd manager driver context
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* @bus: bus handle
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* @dev: linux device
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* @mmio: SoundWire registers mmio base
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* @acp_mmio: acp registers mmio base
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* @amd_sdw_irq_thread: SoundWire manager irq workqueue
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* @amd_sdw_work: peripheral status work queue
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* @acp_sdw_lock: mutex to protect acp share register access
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* @status: peripheral devices status array
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* @num_din_ports: number of input ports
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* @num_dout_ports: number of output ports
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* @cols_index: Column index in frame shape
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* @rows_index: Rows index in frame shape
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* @instance: SoundWire manager instance
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* @quirks: SoundWire manager quirks
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* @wake_en_mask: wake enable mask per SoundWire manager
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* @clk_stopped: flag set to true when clock is stopped
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* @power_mode_mask: flag interprets amd SoundWire manager power mode
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* @dai_runtime_array: dai runtime array
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*/
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struct amd_sdw_manager {
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struct sdw_bus bus;
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struct device *dev;
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void __iomem *mmio;
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void __iomem *acp_mmio;
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struct work_struct amd_sdw_irq_thread;
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struct work_struct amd_sdw_work;
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/* mutex to protect acp common register access */
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struct mutex *acp_sdw_lock;
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enum sdw_slave_status status[SDW_MAX_DEVICES + 1];
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int num_din_ports;
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int num_dout_ports;
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int cols_index;
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int rows_index;
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u32 instance;
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u32 quirks;
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u32 wake_en_mask;
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u32 power_mode_mask;
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bool clk_stopped;
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struct sdw_amd_dai_runtime **dai_runtime_array;
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};
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/**
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* struct sdw_amd_acpi_info - Soundwire AMD information found in ACPI tables
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* @handle: ACPI controller handle
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* @count: maximum no of soundwire manager links supported on AMD platform.
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* @link_mask: bit-wise mask listing links enabled by BIOS menu
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*/
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struct sdw_amd_acpi_info {
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acpi_handle handle;
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int count;
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u32 link_mask;
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};
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/**
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* struct sdw_amd_ctx - context allocated by the controller driver probe
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*
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* @count: link count
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* @num_slaves: total number of devices exposed across all enabled links
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* @link_mask: bit-wise mask listing SoundWire links reported by the
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* Controller
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* @ids: array of slave_id, representing Slaves exposed across all enabled
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* links
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* @pdev: platform device structure
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*/
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struct sdw_amd_ctx {
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int count;
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int num_slaves;
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u32 link_mask;
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struct sdw_extended_slave_id *ids;
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struct platform_device *pdev[AMD_SDW_MAX_MANAGER_COUNT];
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};
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/**
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* struct sdw_amd_res - Soundwire AMD global resource structure,
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* typically populated by the DSP driver/Legacy driver
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*
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* @addr: acp pci device resource start address
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* @reg_range: ACP register range
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* @link_mask: bit-wise mask listing links selected by the DSP driver/
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* legacy driver
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* @count: link count
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* @mmio_base: mmio base of SoundWire registers
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* @handle: ACPI parent handle
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* @parent: parent device
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* @dev: device implementing hwparams and free callbacks
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* @acp_lock: mutex protecting acp common registers access
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*/
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struct sdw_amd_res {
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u32 addr;
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u32 reg_range;
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u32 link_mask;
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int count;
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void __iomem *mmio_base;
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acpi_handle handle;
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struct device *parent;
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struct device *dev;
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/* use to protect acp common registers access */
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struct mutex *acp_lock;
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};
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int sdw_amd_probe(struct sdw_amd_res *res, struct sdw_amd_ctx **ctx);
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void sdw_amd_exit(struct sdw_amd_ctx *ctx);
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int sdw_amd_get_slave_info(struct sdw_amd_ctx *ctx);
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int amd_sdw_scan_controller(struct sdw_amd_acpi_info *info);
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#endif
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