172 lines
5.4 KiB
C
172 lines
5.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2015
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* Texas Instruments Incorporated - http://www.ti.com/
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*/
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#ifndef _RPROC_H_
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#define _RPROC_H_
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/*
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* Note: The platform data support is not meant for use with newer
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* platforms. This is meant only for legacy devices. This mode of
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* initialization *will* be eventually removed once all necessary
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* platforms have moved to dm/fdt.
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*/
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#include <dm/platdata.h> /* For platform data support - non dt world */
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/**
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* enum rproc_mem_type - What type of memory model does the rproc use
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* @RPROC_INTERNAL_MEMORY_MAPPED: Remote processor uses own memory and is memory
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* mapped to the host processor over an address range.
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*
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* Please note that this is an enumeration of memory model of different types
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* of remote processors. Few of the remote processors do have own internal
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* memories, while others use external memory for instruction and data.
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*/
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enum rproc_mem_type {
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RPROC_INTERNAL_MEMORY_MAPPED = 0,
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};
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/**
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* struct dm_rproc_uclass_pdata - platform data for a CPU
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* @name: Platform-specific way of naming the Remote proc
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* @mem_type: one of 'enum rproc_mem_type'
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* @driver_plat_data: driver specific platform data that may be needed.
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*
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* This can be accessed with dev_get_uclass_platdata() for any UCLASS_REMOTEPROC
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* device.
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*
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*/
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struct dm_rproc_uclass_pdata {
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const char *name;
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enum rproc_mem_type mem_type;
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void *driver_plat_data;
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};
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/**
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* struct dm_rproc_ops - Operations that are provided by remote proc driver
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* @init: Initialize the remoteproc device invoked after probe (optional)
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* Return 0 on success, -ve error on fail
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* @load: Load the remoteproc device using data provided(mandatory)
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* This takes the following additional arguments.
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* addr- Address of the binary image to be loaded
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* size- Size of the binary image to be loaded
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* Return 0 on success, -ve error on fail
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* @start: Start the remoteproc device (mandatory)
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* Return 0 on success, -ve error on fail
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* @stop: Stop the remoteproc device (optional)
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* Return 0 on success, -ve error on fail
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* @reset: Reset the remote proc device (optional)
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* Return 0 on success, -ve error on fail
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* @is_running: Check if the remote processor is running(optional)
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* Return 0 on success, 1 if not running, -ve on others errors
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* @ping: Ping the remote device for basic communication check(optional)
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* Return 0 on success, 1 if not responding, -ve on other errors
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*/
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struct dm_rproc_ops {
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int (*init)(struct udevice *dev);
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int (*load)(struct udevice *dev, ulong addr, ulong size);
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int (*start)(struct udevice *dev);
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int (*stop)(struct udevice *dev);
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int (*reset)(struct udevice *dev);
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int (*is_running)(struct udevice *dev);
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int (*ping)(struct udevice *dev);
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};
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/* Accessor */
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#define rproc_get_ops(dev) ((struct dm_rproc_ops *)(dev)->driver->ops)
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#ifdef CONFIG_REMOTEPROC
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/**
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* rproc_init() - Initialize all bound remote proc devices
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*
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* Return: 0 if all ok, else appropriate error value.
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*/
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int rproc_init(void);
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/**
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* rproc_dev_init() - Initialize a remote proc device based on id
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* @id: id of the remote processor
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*
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* Return: 0 if all ok, else appropriate error value.
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*/
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int rproc_dev_init(int id);
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/**
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* rproc_is_initialized() - check to see if remoteproc devices are initialized
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*
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* Return: 0 if all devices are initialized, else appropriate error value.
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*/
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bool rproc_is_initialized(void);
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/**
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* rproc_load() - load binary to a remote processor
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* @id: id of the remote processor
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* @addr: address in memory where the binary image is located
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* @size: size of the binary image
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*
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* Return: 0 if all ok, else appropriate error value.
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*/
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int rproc_load(int id, ulong addr, ulong size);
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/**
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* rproc_start() - Start a remote processor
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* @id: id of the remote processor
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*
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* Return: 0 if all ok, else appropriate error value.
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*/
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int rproc_start(int id);
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/**
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* rproc_stop() - Stop a remote processor
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* @id: id of the remote processor
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*
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* Return: 0 if all ok, else appropriate error value.
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*/
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int rproc_stop(int id);
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/**
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* rproc_reset() - reset a remote processor
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* @id: id of the remote processor
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*
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* Return: 0 if all ok, else appropriate error value.
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*/
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int rproc_reset(int id);
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/**
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* rproc_ping() - ping a remote processor to check if it can communicate
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* @id: id of the remote processor
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*
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* NOTE: this might need communication path available, which is not implemented
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* as part of remoteproc framework - hook on to appropriate bus architecture to
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* do the same
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*
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* Return: 0 if all ok, else appropriate error value.
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*/
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int rproc_ping(int id);
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/**
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* rproc_is_running() - check to see if remote processor is running
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* @id: id of the remote processor
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*
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* NOTE: this may not involve actual communication capability of the remote
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* processor, but just ensures that it is out of reset and executing code.
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*
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* Return: 0 if all ok, else appropriate error value.
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*/
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int rproc_is_running(int id);
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#else
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static inline int rproc_init(void) { return -ENOSYS; }
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static inline int rproc_dev_init(int id) { return -ENOSYS; }
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static inline bool rproc_is_initialized(void) { return false; }
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static inline int rproc_load(int id, ulong addr, ulong size) { return -ENOSYS; }
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static inline int rproc_start(int id) { return -ENOSYS; }
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static inline int rproc_stop(int id) { return -ENOSYS; }
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static inline int rproc_reset(int id) { return -ENOSYS; }
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static inline int rproc_ping(int id) { return -ENOSYS; }
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static inline int rproc_is_running(int id) { return -ENOSYS; }
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#endif
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#endif /* _RPROC_H_ */
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