bbe5e1e6eb
Namespaced the generated headers with `zephyr` to prevent potential conflict with other headers. Introduce a temporary Kconfig `LEGACY_GENERATED_INCLUDE_PATH` that is enabled by default. This allows the developers to continue the use of the old include paths for the time being until it is deprecated and eventually removed. The Kconfig will generate a build-time warning message, similar to the `CONFIG_TIMER_RANDOM_GENERATOR`. Updated the includes path of in-tree sources accordingly. Most of the changes here are scripted, check the PR for more info. Signed-off-by: Yong Cong Sin <ycsin@meta.com>
562 lines
21 KiB
C
562 lines
21 KiB
C
/*
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* Copyright (c) 2019 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Public APIs for eSPI driver
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*/
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#ifndef ZEPHYR_INCLUDE_ESPI_SAF_H_
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#define ZEPHYR_INCLUDE_ESPI_SAF_H_
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#include <zephyr/sys/__assert.h>
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#include <zephyr/types.h>
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#include <zephyr/device.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief eSPI SAF Driver APIs
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* @defgroup espi_interface ESPI Driver APIs
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* @ingroup io_interfaces
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* @{
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*/
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/**
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* @code
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*+----------------------------------------------------------------------+
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*| |
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*| eSPI host +-------------+ |
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*| +-----------+ | Power | +----------+ |
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*| |Out of band| | management | | GPIO | |
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*| ------------ |processor | | controller | | sources | |
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*| +-----------+ +-------------+ +----------+ |
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*| | | | |
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*| ------------ | | | |
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*| +--------+ +---------------+ |
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*| | | |
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*| -----+ +--------+ +----------+ +----v-----+ |
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*| | | LPC | | Tunneled | | Tunneled | |
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*| | | bridge | | SMBus | | GPIO | |
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*| | +--------+ +----------+ +----------+ |
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*| | | | | |
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*| | ------+ | | |
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*| | | | | |
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*| +------v-----+ +---v-------v-------------v----+ |
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*| | eSPI Flash | | eSPI protocol block | |
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*| | access +--->+ | |
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*| +------------+ +------------------------------+ |
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*| | |
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*| ----------- | |
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*| v |
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*| XXXXXXXXXXXXXXXXXXXXXXX |
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*| XXXXXXXXXXXXXXXXXXXXX |
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*| XXXXXXXXXXXXXXXXXXX |
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*+----------------------------------------------------------------------+
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* |
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* +-----------------+
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* --------- | | | | | |
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* | | | | | |
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* --------- | + + + + | eSPI bus
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* | CH0 CH1 CH2 CH3 | (logical channels)
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* | + + + + |
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* | | | | | |
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* +-----------------+
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* |
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*+-----------------------------------------------------------------------+
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*| eSPI slave |
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*| |
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*| CH0 | CH1 | CH2 | CH3 |
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*| eSPI endpoint | VWIRE | OOB | Flash |
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*+-----------------------------------------------------------------------+
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* | |
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* v |
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* +---------+ |
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* | Flash | Slave Attached Flash |
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* +---------+ |
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* |
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* @endcode
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*/
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/**
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* @cond INTERNAL_HIDDEN
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*
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*/
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/** @endcond */
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struct espi_saf_hw_cfg;
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struct espi_saf_flash_cfg;
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struct espi_saf_pr;
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/**
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* @brief eSPI SAF configuration parameters
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*/
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struct espi_saf_cfg {
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uint8_t nflash_devices;
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struct espi_saf_hw_cfg hwcfg;
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struct espi_saf_flash_cfg *flash_cfgs;
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};
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/**
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* @brief eSPI SAF transaction packet format
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*/
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struct espi_saf_packet {
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uint32_t flash_addr;
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uint8_t *buf;
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uint32_t len;
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};
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/*
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*defined in espi.h
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* struct espi_callback
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* typedef void (*espi_callback_handler_t)()
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*/
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/**
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* @cond INTERNAL_HIDDEN
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*
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* eSPI driver API definition and system call entry points
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*
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* (Internal use only.)
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*/
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typedef int (*espi_saf_api_config)(const struct device *dev,
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const struct espi_saf_cfg *cfg);
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typedef int (*espi_saf_api_set_protection_regions)(
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const struct device *dev,
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const struct espi_saf_protection *pr);
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typedef int (*espi_saf_api_activate)(const struct device *dev);
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typedef bool (*espi_saf_api_get_channel_status)(const struct device *dev);
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typedef int (*espi_saf_api_flash_read)(const struct device *dev,
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struct espi_saf_packet *pckt);
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typedef int (*espi_saf_api_flash_write)(const struct device *dev,
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struct espi_saf_packet *pckt);
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typedef int (*espi_saf_api_flash_erase)(const struct device *dev,
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struct espi_saf_packet *pckt);
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typedef int (*espi_saf_api_flash_unsuccess)(const struct device *dev,
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struct espi_saf_packet *pckt);
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/* Callbacks and traffic intercept */
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typedef int (*espi_saf_api_manage_callback)(const struct device *dev,
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struct espi_callback *callback,
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bool set);
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__subsystem struct espi_saf_driver_api {
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espi_saf_api_config config;
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espi_saf_api_set_protection_regions set_protection_regions;
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espi_saf_api_activate activate;
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espi_saf_api_get_channel_status get_channel_status;
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espi_saf_api_flash_read flash_read;
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espi_saf_api_flash_write flash_write;
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espi_saf_api_flash_erase flash_erase;
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espi_saf_api_flash_unsuccess flash_unsuccess;
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espi_saf_api_manage_callback manage_callback;
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};
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/**
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* @endcond
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*/
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/**
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* @brief Configure operation of a eSPI controller.
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*
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* This routine provides a generic interface to override eSPI controller
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* capabilities.
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*
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* If this eSPI controller is acting as slave, the values set here
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* will be discovered as part through the GET_CONFIGURATION command
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* issued by the eSPI master during initialization.
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*
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* If this eSPI controller is acting as master, the values set here
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* will be used by eSPI master to determine minimum common capabilities with
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* eSPI slave then send via SET_CONFIGURATION command.
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*
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* @code
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* +--------+ +---------+ +------+ +---------+ +---------+
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* | eSPI | | eSPI | | eSPI | | eSPI | | eSPI |
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* | slave | | driver | | bus | | driver | | host |
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* +--------+ +---------+ +------+ +---------+ +---------+
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* | | | | |
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* | espi_config | Set eSPI | Set eSPI | espi_config |
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* +--------------+ ctrl regs | cap ctrl reg| +-----------+
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* | +-------+ | +--------+ |
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* | |<------+ | +------->| |
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* | | | | |
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* | | | | |
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* | | | GET_CONFIGURATION | |
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* | | +<------------------+ |
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* | |<-----------| | |
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* | | eSPI caps | | |
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* | |----------->+ response | |
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* | | |------------------>+ |
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* | | | | |
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* | | | SET_CONFIGURATION | |
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* | | +<------------------+ |
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* | | | accept | |
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* | | +------------------>+ |
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* + + + + +
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* @endcode
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*
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* @param dev Pointer to the device structure for the driver instance.
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* @param cfg the device runtime configuration for the eSPI controller.
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*
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* @retval 0 If successful.
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* @retval -EIO General input / output error, failed to configure device.
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* @retval -EINVAL invalid capabilities, failed to configure device.
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* @retval -ENOTSUP capability not supported by eSPI slave.
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*/
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__syscall int espi_saf_config(const struct device *dev,
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const struct espi_saf_cfg *cfg);
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static inline int z_impl_espi_saf_config(const struct device *dev,
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const struct espi_saf_cfg *cfg)
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{
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const struct espi_saf_driver_api *api =
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(const struct espi_saf_driver_api *)dev->api;
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return api->config(dev, cfg);
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}
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/**
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* @brief Set one or more SAF protection regions
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*
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* This routine provides an interface to override the default flash
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* protection regions of the SAF controller.
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*
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* @param dev Pointer to the device structure for the driver instance.
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* @param pr Pointer to the SAF protection region structure.
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*
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* @retval 0 If successful.
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* @retval -EIO General input / output error, failed to configure device.
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* @retval -EINVAL invalid capabilities, failed to configure device.
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* @retval -ENOTSUP capability not supported by eSPI slave.
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*/
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__syscall int espi_saf_set_protection_regions(
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const struct device *dev,
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const struct espi_saf_protection *pr);
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static inline int z_impl_espi_saf_set_protection_regions(
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const struct device *dev,
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const struct espi_saf_protection *pr)
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{
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const struct espi_saf_driver_api *api =
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(const struct espi_saf_driver_api *)dev->api;
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return api->set_protection_regions(dev, pr);
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}
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/**
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* @brief Activate SAF block
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*
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* This routine activates the SAF block and should only be
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* called after SAF has been configured and the eSPI Master
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* has enabled the Flash Channel.
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*
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* @param dev Pointer to the device structure for the driver instance.
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*
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* @retval 0 If successful
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* @retval -EINVAL if failed to activate SAF.
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*/
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__syscall int espi_saf_activate(const struct device *dev);
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static inline int z_impl_espi_saf_activate(const struct device *dev)
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{
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const struct espi_saf_driver_api *api =
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(const struct espi_saf_driver_api *)dev->api;
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return api->activate(dev);
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}
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/**
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* @brief Query to see if SAF is ready
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*
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* This routine allows to check if SAF is ready before use.
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*
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* @param dev Pointer to the device structure for the driver instance.
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*
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* @retval true If eSPI SAF is ready.
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* @retval false otherwise.
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*/
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__syscall bool espi_saf_get_channel_status(const struct device *dev);
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static inline bool z_impl_espi_saf_get_channel_status(
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const struct device *dev)
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{
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const struct espi_saf_driver_api *api =
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(const struct espi_saf_driver_api *)dev->api;
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return api->get_channel_status(dev);
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}
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/**
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* @brief Sends a read request packet for slave attached flash.
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*
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* This routines provides an interface to send a request to read the flash
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* component shared between the eSPI master and eSPI slaves.
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*
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* @param dev Pointer to the device structure for the driver instance.
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* @param pckt Address of the representation of read flash transaction.
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*
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* @retval -ENOTSUP eSPI flash logical channel transactions not supported.
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* @retval -EBUSY eSPI flash channel is not ready or disabled by master.
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* @retval -EIO General input / output error, failed request to master.
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*/
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__syscall int espi_saf_flash_read(const struct device *dev,
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struct espi_saf_packet *pckt);
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static inline int z_impl_espi_saf_flash_read(const struct device *dev,
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struct espi_saf_packet *pckt)
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{
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const struct espi_saf_driver_api *api =
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(const struct espi_saf_driver_api *)dev->api;
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if (!api->flash_read) {
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return -ENOTSUP;
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}
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return api->flash_read(dev, pckt);
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}
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/**
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* @brief Sends a write request packet for slave attached flash.
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*
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* This routines provides an interface to send a request to write to the flash
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* components shared between the eSPI master and eSPI slaves.
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*
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* @param dev Pointer to the device structure for the driver instance.
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* @param pckt Address of the representation of write flash transaction.
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*
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* @retval -ENOTSUP eSPI flash logical channel transactions not supported.
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* @retval -EBUSY eSPI flash channel is not ready or disabled by master.
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* @retval -EIO General input / output error, failed request to master.
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*/
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__syscall int espi_saf_flash_write(const struct device *dev,
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struct espi_saf_packet *pckt);
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static inline int z_impl_espi_saf_flash_write(const struct device *dev,
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struct espi_saf_packet *pckt)
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{
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const struct espi_saf_driver_api *api =
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(const struct espi_saf_driver_api *)dev->api;
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if (!api->flash_write) {
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return -ENOTSUP;
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}
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return api->flash_write(dev, pckt);
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}
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/**
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* @brief Sends a write request packet for slave attached flash.
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*
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* This routines provides an interface to send a request to write to the flash
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* components shared between the eSPI master and eSPI slaves.
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*
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* @param dev Pointer to the device structure for the driver instance.
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* @param pckt Address of the representation of erase flash transaction.
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*
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* @retval -ENOTSUP eSPI flash logical channel transactions not supported.
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* @retval -EBUSY eSPI flash channel is not ready or disabled by master.
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* @retval -EIO General input / output error, failed request to master.
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*/
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__syscall int espi_saf_flash_erase(const struct device *dev,
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struct espi_saf_packet *pckt);
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static inline int z_impl_espi_saf_flash_erase(const struct device *dev,
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struct espi_saf_packet *pckt)
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{
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const struct espi_saf_driver_api *api =
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(const struct espi_saf_driver_api *)dev->api;
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if (!api->flash_erase) {
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return -ENOTSUP;
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}
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return api->flash_erase(dev, pckt);
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}
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/**
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* @brief Response unsuccessful completion for slave attached flash.
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*
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* This routines provides an interface to response that transaction is
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* invalid and return unsuccessful completion from target to controller.
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*
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* @param dev Pointer to the device structure for the driver instance.
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* @param pckt Address of the representation of flash transaction.
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*
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* @retval -ENOTSUP eSPI flash logical channel transactions not supported.
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* @retval -EBUSY eSPI flash channel is not ready or disabled by master.
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* @retval -EIO General input / output error, failed request to master.
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*/
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__syscall int espi_saf_flash_unsuccess(const struct device *dev,
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struct espi_saf_packet *pckt);
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static inline int z_impl_espi_saf_flash_unsuccess(const struct device *dev,
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struct espi_saf_packet *pckt)
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{
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const struct espi_saf_driver_api *api =
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(const struct espi_saf_driver_api *)dev->api;
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if (!api->flash_unsuccess) {
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return -ENOTSUP;
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}
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return api->flash_unsuccess(dev, pckt);
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}
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/**
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* Callback model
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*
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* @code
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*+-------+ +-------------+ +------+ +---------+
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*| App | | eSPI driver | | HW | |eSPI Host|
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*+---+---+ +-------+-----+ +---+--+ +----+----+
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* | | | |
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* | espi_init_callback | | |
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* +----------------------------> | | |
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* | espi_add_callback | |
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* +----------------------------->+ |
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* | | | eSPI reset | eSPI host
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* | | IRQ +<------------+ resets the
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* | | <-----------+ | bus
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* | | | |
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* | | Processed | |
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* | | within the | |
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* | | driver | |
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* | | | |
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* | | | VW CH ready| eSPI host
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* | | IRQ +<------------+ enables VW
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* | | <-----------+ | channel
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* | | | |
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* | | Processed | |
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* | | within the | |
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* | | driver | |
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* | | | |
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* | | | Memory I/O | Peripheral
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* | | <-------------+ event
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* | +<------------+ |
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* +<-----------------------------+ callback | |
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* | Report peripheral event | | |
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* | and data for the event | | |
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* | | | |
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* | | | SLP_S5 | eSPI host
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* | | <-------------+ send VWire
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* | +<------------+ |
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* +<-----------------------------+ callback | |
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* | App enables/configures | | |
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* | discrete regulator | | |
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* | | | |
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* | espi_send_vwire_signal | | |
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* +------------------------------>------------>|------------>|
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* | | | |
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* | | | HOST_RST | eSPI host
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* | | <-------------+ send VWire
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* | +<------------+ |
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* +<-----------------------------+ callback | |
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* | App reset host-related | | |
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* | data structures | | |
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* | | | |
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* | | | C10 | eSPI host
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* | | +<------------+ send VWire
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* | <-------------+ |
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* <------------------------------+ | |
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* | App executes | | |
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* + power mgmt policy | | |
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* @endcode
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*/
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/**
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* @brief Helper to initialize a struct espi_callback properly.
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*
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* @param callback A valid Application's callback structure pointer.
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* @param handler A valid handler function pointer.
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* @param evt_type indicates the eSPI event relevant for the handler.
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* for VWIRE_RECEIVED event the data will indicate the new level asserted
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*/
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static inline void espi_saf_init_callback(struct espi_callback *callback,
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espi_callback_handler_t handler,
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enum espi_bus_event evt_type)
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{
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__ASSERT(callback, "Callback pointer should not be NULL");
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__ASSERT(handler, "Callback handler pointer should not be NULL");
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callback->handler = handler;
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callback->evt_type = evt_type;
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}
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/**
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* @brief Add an application callback.
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* @param dev Pointer to the device structure for the driver instance.
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* @param callback A valid Application's callback structure pointer.
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* @return 0 if successful, negative errno code on failure.
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*
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* @note Callbacks may be added to the device from within a callback
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* handler invocation, but whether they are invoked for the current
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* eSPI event is not specified.
|
|
*
|
|
* Note: enables to add as many callback as needed on the same device.
|
|
*/
|
|
static inline int espi_saf_add_callback(const struct device *dev,
|
|
struct espi_callback *callback)
|
|
{
|
|
const struct espi_saf_driver_api *api =
|
|
(const struct espi_saf_driver_api *)dev->api;
|
|
|
|
if (!api->manage_callback) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
return api->manage_callback(dev, callback, true);
|
|
}
|
|
|
|
/**
|
|
* @brief Remove an application callback.
|
|
* @param dev Pointer to the device structure for the driver instance.
|
|
* @param callback A valid application's callback structure pointer.
|
|
* @return 0 if successful, negative errno code on failure.
|
|
*
|
|
* @warning It is explicitly permitted, within a callback handler, to
|
|
* remove the registration for the callback that is running, i.e. @p
|
|
* callback. Attempts to remove other registrations on the same
|
|
* device may result in undefined behavior, including failure to
|
|
* invoke callbacks that remain registered and unintended invocation
|
|
* of removed callbacks.
|
|
*
|
|
* Note: enables to remove as many callbacks as added through
|
|
* espi_add_callback().
|
|
*/
|
|
static inline int espi_saf_remove_callback(const struct device *dev,
|
|
struct espi_callback *callback)
|
|
{
|
|
const struct espi_saf_driver_api *api =
|
|
(const struct espi_saf_driver_api *)dev->api;
|
|
|
|
if (!api->manage_callback) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
return api->manage_callback(dev, callback, false);
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
#include <zephyr/syscalls/espi_saf.h>
|
|
#endif /* ZEPHYR_INCLUDE_ESPI_SAF_H_ */
|