Vikas Gupta | 8ed6373 | 2020-07-15 22:57:19 +0530 | [diff] [blame] | 1 | // SPDX-License-Identifier: BSD-2-Clause |
| 2 | /* |
| 3 | * Copyright 2020 Broadcom. |
| 4 | */ |
| 5 | |
| 6 | #include <common.h> |
| 7 | #include <tee.h> |
| 8 | #include <broadcom/chimp.h> |
| 9 | |
| 10 | #ifdef CONFIG_CHIMP_OPTEE |
| 11 | |
| 12 | #define CHMIP_BOOT_UUID { 0x6272636D, 0x2019, 0x0716, \ |
| 13 | { 0x42, 0x43, 0x4D, 0x5F, 0x53, 0x43, 0x48, 0x49 } } |
| 14 | |
| 15 | enum { |
| 16 | TEE_CHIMP_FASTBOOT = 0, |
| 17 | TEE_CHIMP_HEALTH_STATUS, |
| 18 | TEE_CHIMP_HANDSHAKE_STATUS, |
| 19 | } tee_chmip_cmd; |
| 20 | |
| 21 | struct bcm_chimp_data { |
| 22 | struct udevice *tee; |
| 23 | u32 session; |
| 24 | } chimp_data; |
| 25 | |
| 26 | static int get_open_session(struct bcm_chimp_data *b_data) |
| 27 | { |
| 28 | const struct tee_optee_ta_uuid uuid = CHMIP_BOOT_UUID; |
| 29 | struct tee_open_session_arg arg; |
| 30 | struct udevice *tee = NULL; |
| 31 | int rc; |
| 32 | |
| 33 | tee = tee_find_device(NULL, NULL, NULL, NULL); |
| 34 | if (!tee) |
| 35 | return -ENODEV; |
| 36 | |
| 37 | memset(&arg, 0, sizeof(arg)); |
| 38 | tee_optee_ta_uuid_to_octets(arg.uuid, &uuid); |
| 39 | rc = tee_open_session(tee, &arg, 0, NULL); |
| 40 | if (rc < 0) |
| 41 | return -ENODEV; |
| 42 | |
| 43 | b_data->tee = tee; |
| 44 | b_data->session = arg.session; |
| 45 | |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | static int init_arg(struct tee_invoke_arg *arg, u32 func) |
| 50 | { |
| 51 | if (get_open_session(&chimp_data)) |
| 52 | return -EINVAL; |
| 53 | |
| 54 | memset(arg, 0, sizeof(struct tee_invoke_arg)); |
| 55 | arg->func = func; |
| 56 | arg->session = chimp_data.session; |
| 57 | |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | int chimp_handshake_status_optee(u32 timeout, u32 *hs) |
| 62 | { |
| 63 | struct tee_invoke_arg arg; |
| 64 | struct tee_param param[1]; |
| 65 | int ret; |
| 66 | |
| 67 | ret = init_arg(&arg, TEE_CHIMP_HANDSHAKE_STATUS); |
| 68 | if (ret < 0) |
| 69 | return ret; |
| 70 | |
| 71 | param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_INOUT; |
| 72 | param[0].u.value.a = timeout; |
| 73 | |
| 74 | ret = tee_invoke_func(chimp_data.tee, &arg, ARRAY_SIZE(param), param); |
| 75 | if (ret < 0) { |
| 76 | printf("Handshake status command failed\n"); |
| 77 | goto out; |
| 78 | } |
| 79 | |
| 80 | switch (arg.ret) { |
| 81 | case TEE_SUCCESS: |
| 82 | *hs = param[0].u.value.a; |
| 83 | ret = 0; |
| 84 | break; |
| 85 | default: |
| 86 | ret = -EINVAL; |
| 87 | break; |
| 88 | } |
| 89 | |
| 90 | out: |
| 91 | tee_close_session(chimp_data.tee, chimp_data.session); |
| 92 | chimp_data.tee = NULL; |
| 93 | |
| 94 | return ret; |
| 95 | } |
| 96 | |
| 97 | int chimp_health_status_optee(u32 *health) |
| 98 | { |
| 99 | struct tee_invoke_arg arg; |
| 100 | struct tee_param param[1]; |
| 101 | int ret; |
| 102 | |
| 103 | ret = init_arg(&arg, TEE_CHIMP_HEALTH_STATUS); |
| 104 | if (ret < 0) |
| 105 | return ret; |
| 106 | |
| 107 | param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT; |
| 108 | |
| 109 | ret = tee_invoke_func(chimp_data.tee, &arg, ARRAY_SIZE(param), param); |
| 110 | if (ret < 0) { |
| 111 | printf("Helath status command failed\n"); |
| 112 | goto out; |
| 113 | } |
| 114 | |
| 115 | switch (arg.ret) { |
| 116 | case TEE_SUCCESS: |
| 117 | *health = param[0].u.value.a; |
| 118 | ret = 0; |
| 119 | break; |
| 120 | default: |
| 121 | ret = -EINVAL; |
| 122 | break; |
| 123 | } |
| 124 | |
| 125 | out: |
| 126 | tee_close_session(chimp_data.tee, chimp_data.session); |
| 127 | chimp_data.tee = NULL; |
| 128 | |
| 129 | return ret; |
| 130 | } |
| 131 | |
| 132 | int chimp_fastboot_optee(void) |
| 133 | { |
| 134 | struct tee_invoke_arg arg; |
| 135 | int ret; |
| 136 | |
| 137 | ret = init_arg(&arg, TEE_CHIMP_FASTBOOT); |
| 138 | if (ret < 0) |
| 139 | return ret; |
| 140 | |
| 141 | ret = tee_invoke_func(chimp_data.tee, &arg, 0, NULL); |
| 142 | if (ret < 0) { |
| 143 | printf("Chimp boot_fail\n"); |
| 144 | goto out; |
| 145 | } |
| 146 | |
| 147 | switch (arg.ret) { |
| 148 | case TEE_SUCCESS: |
| 149 | ret = 0; |
| 150 | break; |
| 151 | default: |
| 152 | ret = -EINVAL; |
| 153 | break; |
| 154 | } |
| 155 | |
| 156 | out: |
| 157 | tee_close_session(chimp_data.tee, chimp_data.session); |
| 158 | chimp_data.tee = NULL; |
| 159 | |
| 160 | return ret; |
| 161 | } |
| 162 | #else |
| 163 | int chimp_handshake_status_optee(u32 timeout, u32 *status) |
| 164 | { |
| 165 | printf("ChiMP handshake status fail (OPTEE not enabled)\n"); |
| 166 | |
| 167 | return -EINVAL; |
| 168 | } |
| 169 | |
| 170 | int chimp_health_status_optee(u32 *status) |
| 171 | { |
| 172 | printf("ChiMP health status fail (OPTEE not enabled)\n"); |
| 173 | |
| 174 | return -EINVAL; |
| 175 | } |
| 176 | |
| 177 | int chimp_fastboot_optee(void) |
| 178 | { |
| 179 | printf("ChiMP secure boot fail (OPTEE not enabled)\n"); |
| 180 | |
| 181 | return -EINVAL; |
| 182 | } |
| 183 | #endif /* CONFIG_CHIMP_OPTEE */ |