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firmware: xilinx: Add ZynqMP efuse access API

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Add zynqmp_pm_efuse_access API in the ZynqMP
firmware for read/write access of efuse memory.

Signed-off-by: Praveen Teja Kundanala <praveen.teja.kundanala@amd.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20240224114516.86365-6-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Praveen Teja Kundanala 2024-02-24 11:45:10 +00:00 committed by Greg Kroah-Hartman
parent d28c853b32
commit e34b943068
2 changed files with 33 additions and 0 deletions
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25
drivers/firmware/xilinx/zynqmp.c
View file

@ -3,6 +3,7 @@
* Xilinx Zynq MPSoC Firmware layer
*
* Copyright (C) 2014-2022 Xilinx, Inc.
* Copyright (C) 2022 - 2023, Advanced Micro Devices, Inc.
*
* Michal Simek <michal.simek@amd.com>
* Davorin Mista <davorin.mista@aggios.com>
@ -1384,6 +1385,30 @@ int zynqmp_pm_aes_engine(const u64 address, u32 *out)
}
EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine);
/**
* zynqmp_pm_efuse_access - Provides access to efuse memory.
* @address: Address of the efuse params structure
* @out: Returned output value
*
* Return: Returns status, either success or error code.
*/
int zynqmp_pm_efuse_access(const u64 address, u32 *out)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!out)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_EFUSE_ACCESS, ret_payload, 2,
upper_32_bits(address),
lower_32_bits(address));
*out = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_efuse_access);
/**
* zynqmp_pm_sha_hash - Access the SHA engine to calculate the hash
* @address: Address of the data/ Address of output buffer where

8
include/linux/firmware/xlnx-zynqmp.h
View file

@ -3,6 +3,7 @@
* Xilinx Zynq MPSoC Firmware layer
*
* Copyright (C) 2014-2021 Xilinx
* Copyright (C) 2022 - 2023, Advanced Micro Devices, Inc.
*
* Michal Simek <michal.simek@amd.com>
* Davorin Mista <davorin.mista@aggios.com>
@ -171,6 +172,7 @@ enum pm_api_id {
PM_CLOCK_GETPARENT = 44,
PM_FPGA_READ = 46,
PM_SECURE_AES = 47,
PM_EFUSE_ACCESS = 53,
PM_FEATURE_CHECK = 63,
};
@ -562,6 +564,7 @@ int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
const u32 qos,
const enum zynqmp_pm_request_ack ack);
int zynqmp_pm_aes_engine(const u64 address, u32 *out);
int zynqmp_pm_efuse_access(const u64 address, u32 *out);
int zynqmp_pm_sha_hash(const u64 address, const u32 size, const u32 flags);
int zynqmp_pm_fpga_load(const u64 address, const u32 size, const u32 flags);
int zynqmp_pm_fpga_get_status(u32 *value);
@ -749,6 +752,11 @@ static inline int zynqmp_pm_aes_engine(const u64 address, u32 *out)
return -ENODEV;
}
static inline int zynqmp_pm_efuse_access(const u64 address, u32 *out)
{
return -ENODEV;
}
static inline int zynqmp_pm_sha_hash(const u64 address, const u32 size,
const u32 flags)
{