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/* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
/*
* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
*/
#ifndef __STM32MP1_SMC_H__
#define __STM32MP1_SMC_H__
#include <linux/arm-smccc.h>
/*
* SMC function IDs for STM32 Service queries
* STM32 SMC services use the space between 0x82000000 and 0x8200FFFF
* like this is defined in SMC calling Convention by ARM
* for SiP (silicon Partner)
* http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
*/
#define STM32_SMC_VERSION 0x82000000
/* Secure Service access from Non-secure */
#define STM32_SMC_BSEC 0x82001003
/* Service for BSEC */
#define STM32_SMC_READ_SHADOW 0x01
#define STM32_SMC_PROG_OTP 0x02
#define STM32_SMC_WRITE_SHADOW 0x03
#define STM32_SMC_READ_OTP 0x04
#define STM32_SMC_READ_ALL 0x05
#define STM32_SMC_WRITE_ALL 0x06
#define STM32_SMC_WRLOCK_OTP 0x07
/* SMC error codes */
#define STM32_SMC_OK 0x0
#define STM32_SMC_NOT_SUPPORTED -1
#define STM32_SMC_FAILED -2
#define STM32_SMC_INVALID_PARAMS -3
#define stm32_smc_exec(svc, op, data1, data2) \
stm32_smc(svc, op, data1, data2, NULL)
#ifdef CONFIG_ARM_SMCCC
static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result)
{
struct arm_smccc_res res;
arm_smccc_smc(svc, op, data1, data2, 0, 0, 0, 0, &res);
if (res.a0) {
pr_err("%s: Failed to exec svc=%x op=%x in secure mode (err = %ld)\n",
__func__, svc, op, res.a0);
return -EINVAL;
}
if (result)
*result = (u32)res.a1;
return 0;
}
#else
static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result)
{
return 0;
}
#endif
#endif /* __STM32MP1_SMC_H__ */
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