| /* 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 |