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