mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-09-19 21:01:51 +02:00
d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
// 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 <arm_ffa_priv.h>
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <asm/global_data.h>
|
|
#include <dm/device-internal.h>
|
|
#include <linux/errno.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/**
|
|
* invoke_ffa_fn() - SMC wrapper
|
|
* @args: FF-A ABI arguments to be copied to Xn registers
|
|
* @res: FF-A ABI return data to be copied from Xn registers
|
|
*
|
|
* Calls low level SMC assembly function
|
|
*/
|
|
void invoke_ffa_fn(ffa_value_t args, ffa_value_t *res)
|
|
{
|
|
arm_smccc_1_2_smc(&args, res);
|
|
}
|
|
|
|
/**
|
|
* arm_ffa_discover() - perform FF-A discovery
|
|
* @dev: The Arm FF-A bus device (arm_ffa)
|
|
* 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:
|
|
*
|
|
* true on success. Otherwise, false.
|
|
*/
|
|
static bool arm_ffa_discover(struct udevice *dev)
|
|
{
|
|
int ret;
|
|
|
|
log_debug("Arm FF-A framework discovery\n");
|
|
|
|
ret = ffa_get_version_hdlr(dev);
|
|
if (ret)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* arm_ffa_is_supported() - FF-A bus discovery callback
|
|
* @invoke_fn: legacy SMC invoke function (not used)
|
|
*
|
|
* Perform FF-A discovery by calling arm_ffa_discover().
|
|
* Discovery is performed by querying the FF-A framework version from
|
|
* secure world using the FFA_VERSION ABI.
|
|
*
|
|
* The FF-A driver is registered as an SMCCC feature driver. So, features discovery
|
|
* callbacks are called by the PSCI driver (PSCI device is the SMCCC features
|
|
* root device).
|
|
*
|
|
* The FF-A driver supports the SMCCCv1.2 extended input/output registers.
|
|
* So, the legacy SMC invocation is not used.
|
|
*
|
|
* Return:
|
|
*
|
|
* 0 on success. Otherwise, failure
|
|
*/
|
|
static bool arm_ffa_is_supported(void (*invoke_fn)(ulong a0, ulong a1,
|
|
ulong a2, ulong a3,
|
|
ulong a4, ulong a5,
|
|
ulong a6, ulong a7,
|
|
struct arm_smccc_res *res))
|
|
{
|
|
return arm_ffa_discover(NULL);
|
|
}
|
|
|
|
/* Arm FF-A driver operations */
|
|
|
|
static const struct ffa_bus_ops 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,
|
|
};
|
|
|
|
/* Registering the FF-A driver as an SMCCC feature driver */
|
|
|
|
ARM_SMCCC_FEATURE_DRIVER(arm_ffa) = {
|
|
.driver_name = FFA_DRV_NAME,
|
|
.is_supported = arm_ffa_is_supported,
|
|
};
|
|
|
|
/* Declaring the FF-A driver under UCLASS_FFA */
|
|
|
|
U_BOOT_DRIVER(arm_ffa) = {
|
|
.name = FFA_DRV_NAME,
|
|
.id = UCLASS_FFA,
|
|
.flags = DM_REMOVE_OS_PREPARE,
|
|
.ops = &ffa_ops,
|
|
};
|