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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
*
* Authors:
* Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
*/
#include <common.h>
#include <arm_ffa.h>
#include <dm.h>
#include <log.h>
#include <asm/global_data.h>
#include <asm/sandbox_arm_ffa_priv.h>
#include <dm/device-internal.h>
#include <linux/errno.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* sandbox_ffa_discover() - perform sandbox FF-A discovery
* @dev: The sandbox FF-A bus device
* Try to discover the FF-A framework. Discovery is performed by
* querying the FF-A framework version from secure world using the FFA_VERSION ABI.
* Return:
*
* 0 on success. Otherwise, failure
*/
static int sandbox_ffa_discover(struct udevice *dev)
{
int ret;
struct udevice *emul;
log_debug("Emulated FF-A framework discovery\n");
ret = ffa_emul_find(dev, &emul);
if (ret) {
log_err("Cannot find FF-A emulator\n");
return ret;
}
ret = ffa_get_version_hdlr(dev);
if (ret)
return ret;
return 0;
}
/**
* sandbox_ffa_probe() - The sandbox FF-A driver probe function
* @dev: the sandbox-arm-ffa device
* Save the emulator device in uc_priv.
* Return:
*
* 0 on success.
*/
static int sandbox_ffa_probe(struct udevice *dev)
{
int ret;
struct ffa_priv *uc_priv = dev_get_uclass_priv(dev);
ret = uclass_first_device_err(UCLASS_FFA_EMUL, &uc_priv->emul);
if (ret) {
log_err("Cannot find FF-A emulator\n");
return ret;
}
return 0;
}
/**
* sandbox_ffa_bind() - The sandbox FF-A driver bind function
* @dev: the sandbox-arm-ffa device
* Try to discover the emulated FF-A bus.
* Return:
*
* 0 on success.
*/
static int sandbox_ffa_bind(struct udevice *dev)
{
int ret;
ret = sandbox_ffa_discover(dev);
if (ret)
return ret;
return 0;
}
/* Sandbox Arm FF-A emulator operations */
static const struct ffa_bus_ops sandbox_ffa_ops = {
.partition_info_get = ffa_get_partitions_info_hdlr,
.sync_send_receive = ffa_msg_send_direct_req_hdlr,
.rxtx_unmap = ffa_unmap_rxtx_buffers_hdlr,
};
static const struct udevice_id sandbox_ffa_id[] = {
{ "sandbox,arm-ffa", 0 },
{ },
};
/* Declaring the sandbox FF-A driver under UCLASS_FFA */
U_BOOT_DRIVER(sandbox_arm_ffa) = {
.name = "sandbox_arm_ffa",
.of_match = sandbox_ffa_id,
.id = UCLASS_FFA,
.bind = sandbox_ffa_bind,
.probe = sandbox_ffa_probe,
.ops = &sandbox_ffa_ops,
};
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