1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2020 Intel Corporation <www.intel.com>
4 *
5 */
6
7 #include <common.h>
8 #include <hang.h>
9 #include <asm/io.h>
10 #include <asm/system.h>
11 #include <asm/arch/misc.h>
12 #include <asm/arch/secure_reg_helper.h>
13 #include <asm/arch/smc_api.h>
14 #include <asm/arch/system_manager.h>
15 #include <linux/errno.h>
16 #include <linux/intel-smc.h>
17
socfpga_secure_convert_reg_id_to_addr(u32 id,phys_addr_t * reg_addr)18 int socfpga_secure_convert_reg_id_to_addr(u32 id, phys_addr_t *reg_addr)
19 {
20 switch (id) {
21 case SOCFPGA_SECURE_REG_SYSMGR_SOC64_SDMMC:
22 *reg_addr = socfpga_get_sysmgr_addr() + SYSMGR_SOC64_SDMMC;
23 break;
24 case SOCFPGA_SECURE_REG_SYSMGR_SOC64_EMAC0:
25 *reg_addr = socfpga_get_sysmgr_addr() + SYSMGR_SOC64_EMAC0;
26 break;
27 case SOCFPGA_SECURE_REG_SYSMGR_SOC64_EMAC1:
28 *reg_addr = socfpga_get_sysmgr_addr() + SYSMGR_SOC64_EMAC1;
29 break;
30 case SOCFPGA_SECURE_REG_SYSMGR_SOC64_EMAC2:
31 *reg_addr = socfpga_get_sysmgr_addr() + SYSMGR_SOC64_EMAC2;
32 break;
33 default:
34 return -EADDRNOTAVAIL;
35 }
36 return 0;
37 }
38
socfpga_secure_reg_read32(u32 id,u32 * val)39 int socfpga_secure_reg_read32(u32 id, u32 *val)
40 {
41 int ret;
42 u64 ret_arg;
43 u64 args[1];
44
45 phys_addr_t reg_addr;
46 ret = socfpga_secure_convert_reg_id_to_addr(id, ®_addr);
47 if (ret)
48 return ret;
49
50 args[0] = (u64)reg_addr;
51 ret = invoke_smc(INTEL_SIP_SMC_REG_READ, args, 1, &ret_arg, 1);
52 if (ret)
53 return ret;
54
55 *val = (u32)ret_arg;
56
57 return 0;
58 }
59
socfpga_secure_reg_write32(u32 id,u32 val)60 int socfpga_secure_reg_write32(u32 id, u32 val)
61 {
62 int ret;
63 u64 args[2];
64
65 phys_addr_t reg_addr;
66 ret = socfpga_secure_convert_reg_id_to_addr(id, ®_addr);
67 if (ret)
68 return ret;
69
70 args[0] = (u64)reg_addr;
71 args[1] = val;
72 return invoke_smc(INTEL_SIP_SMC_REG_WRITE, args, 2, NULL, 0);
73 }
74
socfpga_secure_reg_update32(u32 id,u32 mask,u32 val)75 int socfpga_secure_reg_update32(u32 id, u32 mask, u32 val)
76 {
77 int ret;
78 u64 args[3];
79
80 phys_addr_t reg_addr;
81 ret = socfpga_secure_convert_reg_id_to_addr(id, ®_addr);
82 if (ret)
83 return ret;
84
85 args[0] = (u64)reg_addr;
86 args[1] = mask;
87 args[2] = val;
88 return invoke_smc(INTEL_SIP_SMC_REG_UPDATE, args, 3, NULL, 0);
89 }
90