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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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905b5a81af
In ClockStop mode, the PCI device will be notified of a wake, which will be handled from an interrupt thread. Signed-off-by: Rander Wang <rander.wang@intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20191212014507.28050-10-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
139 lines
4.0 KiB
C
139 lines
4.0 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
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/* Copyright(c) 2015-17 Intel Corporation. */
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#ifndef __SDW_INTEL_H
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#define __SDW_INTEL_H
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#include <linux/irqreturn.h>
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/**
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* struct sdw_intel_stream_params_data: configuration passed during
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* the @params_stream callback, e.g. for interaction with DSP
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* firmware.
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*/
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struct sdw_intel_stream_params_data {
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struct snd_pcm_substream *substream;
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struct snd_soc_dai *dai;
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struct snd_pcm_hw_params *hw_params;
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int link_id;
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int alh_stream_id;
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};
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/**
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* struct sdw_intel_stream_free_data: configuration passed during
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* the @free_stream callback, e.g. for interaction with DSP
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* firmware.
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*/
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struct sdw_intel_stream_free_data {
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struct snd_pcm_substream *substream;
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struct snd_soc_dai *dai;
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int link_id;
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};
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/**
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* struct sdw_intel_ops: Intel audio driver callback ops
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*
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*/
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struct sdw_intel_ops {
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int (*params_stream)(struct device *dev,
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struct sdw_intel_stream_params_data *params_data);
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int (*free_stream)(struct device *dev,
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struct sdw_intel_stream_free_data *free_data);
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};
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/**
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* struct sdw_intel_acpi_info - Soundwire Intel information found in ACPI tables
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* @handle: ACPI controller handle
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* @count: link count found with "sdw-master-count" property
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* @link_mask: bit-wise mask listing links enabled by BIOS menu
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*
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* this structure could be expanded to e.g. provide all the _ADR
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* information in case the link_mask is not sufficient to identify
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* platform capabilities.
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*/
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struct sdw_intel_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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struct sdw_intel_link_res;
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/**
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* struct sdw_intel_ctx - context allocated by the controller
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* driver probe
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* @count: link count
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* @mmio_base: mmio base of SoundWire registers, only used to check
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* hardware capabilities after all power dependencies are settled.
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* @link_mask: bit-wise mask listing SoundWire links reported by the
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* Controller
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* @handle: ACPI parent handle
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* @links: information for each link (controller-specific and kept
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* opaque here)
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* @link_list: list to handle interrupts across all links
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*/
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struct sdw_intel_ctx {
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int count;
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void __iomem *mmio_base;
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u32 link_mask;
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acpi_handle handle;
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struct sdw_intel_link_res *links;
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struct list_head link_list;
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};
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/**
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* struct sdw_intel_res - Soundwire Intel global resource structure,
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* typically populated by the DSP driver
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*
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* @count: link count
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* @mmio_base: mmio base of SoundWire registers
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* @irq: interrupt number
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* @handle: ACPI parent handle
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* @parent: parent device
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* @ops: callback ops
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* @dev: device implementing hwparams and free callbacks
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* @link_mask: bit-wise mask listing links selected by the DSP driver
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* This mask may be a subset of the one reported by the controller since
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* machine-specific quirks are handled in the DSP driver.
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*/
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struct sdw_intel_res {
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int count;
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void __iomem *mmio_base;
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int irq;
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acpi_handle handle;
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struct device *parent;
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const struct sdw_intel_ops *ops;
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struct device *dev;
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u32 link_mask;
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};
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/*
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* On Intel platforms, the SoundWire IP has dependencies on power
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* rails shared with the DSP, and the initialization steps are split
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* in three. First an ACPI scan to check what the firmware describes
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* in DSDT tables, then an allocation step (with no hardware
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* configuration but with all the relevant devices created) and last
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* the actual hardware configuration. The final stage is a global
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* interrupt enable which is controlled by the DSP driver. Splitting
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* these phases helps simplify the boot flow and make early decisions
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* on e.g. which machine driver to select (I2S mode, HDaudio or
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* SoundWire).
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*/
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int sdw_intel_acpi_scan(acpi_handle *parent_handle,
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struct sdw_intel_acpi_info *info);
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void sdw_intel_process_wakeen_event(struct sdw_intel_ctx *ctx);
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struct sdw_intel_ctx *
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sdw_intel_probe(struct sdw_intel_res *res);
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int sdw_intel_startup(struct sdw_intel_ctx *ctx);
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void sdw_intel_exit(struct sdw_intel_ctx *ctx);
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void sdw_intel_enable_irq(void __iomem *mmio_base, bool enable);
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irqreturn_t sdw_intel_thread(int irq, void *dev_id);
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#endif
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