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