1 /* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
2 /*
3 * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
4 */
5
6 #ifndef __STM32MP1_SMC_H__
7 #define __STM32MP1_SMC_H__
8
9 #include <linux/arm-smccc.h>
10
11 /*
12 * SMC function IDs for STM32 Service queries
13 * STM32 SMC services use the space between 0x82000000 and 0x8200FFFF
14 * like this is defined in SMC calling Convention by ARM
15 * for SiP (silicon Partner)
16 * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
17 */
18 #define STM32_SMC_VERSION 0x82000000
19
20 /* Secure Service access from Non-secure */
21 #define STM32_SMC_BSEC 0x82001003
22
23 /* Service for BSEC */
24 #define STM32_SMC_READ_SHADOW 0x01
25 #define STM32_SMC_PROG_OTP 0x02
26 #define STM32_SMC_WRITE_SHADOW 0x03
27 #define STM32_SMC_READ_OTP 0x04
28 #define STM32_SMC_READ_ALL 0x05
29 #define STM32_SMC_WRITE_ALL 0x06
30 #define STM32_SMC_WRLOCK_OTP 0x07
31
32 /* SMC error codes */
33 #define STM32_SMC_OK 0x0
34 #define STM32_SMC_NOT_SUPPORTED -1
35 #define STM32_SMC_FAILED -2
36 #define STM32_SMC_INVALID_PARAMS -3
37
38 #define stm32_smc_exec(svc, op, data1, data2) \
39 stm32_smc(svc, op, data1, data2, NULL)
40
41 #ifdef CONFIG_ARM_SMCCC
stm32_smc(u32 svc,u8 op,u32 data1,u32 data2,u32 * result)42 static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result)
43 {
44 struct arm_smccc_res res;
45
46 arm_smccc_smc(svc, op, data1, data2, 0, 0, 0, 0, &res);
47
48 if (res.a0) {
49 pr_err("%s: Failed to exec svc=%x op=%x in secure mode (err = %ld)\n",
50 __func__, svc, op, res.a0);
51 return -EINVAL;
52 }
53 if (result)
54 *result = (u32)res.a1;
55
56 return 0;
57 }
58 #else
stm32_smc(u32 svc,u8 op,u32 data1,u32 data2,u32 * result)59 static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result)
60 {
61 return 0;
62 }
63 #endif
64
65 #endif /* __STM32MP1_SMC_H__ */
66