1 /* 2 * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <string.h> 9 10 #include <platform_def.h> 11 12 #include <arch_helpers.h> 13 #include <common/debug.h> 14 #include <drivers/io/io_block.h> 15 #include <drivers/io/io_driver.h> 16 #include <drivers/io/io_dummy.h> 17 #include <drivers/io/io_storage.h> 18 #include <drivers/mmc.h> 19 #include <drivers/partition/partition.h> 20 #include <drivers/st/io_mmc.h> 21 #include <drivers/st/io_stm32image.h> 22 #include <drivers/st/stm32_sdmmc2.h> 23 #include <lib/mmio.h> 24 #include <lib/utils.h> 25 #include <plat/common/platform.h> 26 27 /* IO devices */ 28 static const io_dev_connector_t *dummy_dev_con; 29 static uintptr_t dummy_dev_handle; 30 static uintptr_t dummy_dev_spec; 31 32 static uintptr_t image_dev_handle; 33 34 static io_block_spec_t gpt_block_spec = { 35 .offset = 0, 36 .length = 34 * MMC_BLOCK_SIZE, /* Size of GPT table */ 37 }; 38 39 static uint32_t block_buffer[MMC_BLOCK_SIZE] __aligned(MMC_BLOCK_SIZE); 40 41 static const io_block_dev_spec_t mmc_block_dev_spec = { 42 /* It's used as temp buffer in block driver */ 43 .buffer = { 44 .offset = (size_t)&block_buffer, 45 .length = MMC_BLOCK_SIZE, 46 }, 47 .ops = { 48 .read = mmc_read_blocks, 49 .write = NULL, 50 }, 51 .block_size = MMC_BLOCK_SIZE, 52 }; 53 54 static uintptr_t storage_dev_handle; 55 static const io_dev_connector_t *mmc_dev_con; 56 57 static const io_block_spec_t bl32_block_spec = { 58 .offset = BL32_BASE, 59 .length = STM32MP_BL32_SIZE 60 }; 61 62 static const io_block_spec_t bl2_block_spec = { 63 .offset = BL2_BASE, 64 .length = STM32MP_BL2_SIZE, 65 }; 66 67 static const struct stm32image_part_info bl33_partition_spec = { 68 .name = BL33_IMAGE_NAME, 69 .binary_type = BL33_BINARY_TYPE, 70 }; 71 72 enum { 73 IMG_IDX_BL33, 74 IMG_IDX_NUM 75 }; 76 77 static struct stm32image_device_info stm32image_dev_info_spec = { 78 .lba_size = MMC_BLOCK_SIZE, 79 .part_info[IMG_IDX_BL33] = { 80 .name = BL33_IMAGE_NAME, 81 .binary_type = BL33_BINARY_TYPE, 82 }, 83 }; 84 85 static io_block_spec_t stm32image_block_spec = { 86 .offset = 0, 87 .length = 0, 88 }; 89 90 static const io_dev_connector_t *stm32image_dev_con; 91 92 static int open_dummy(const uintptr_t spec); 93 static int open_image(const uintptr_t spec); 94 static int open_storage(const uintptr_t spec); 95 96 struct plat_io_policy { 97 uintptr_t *dev_handle; 98 uintptr_t image_spec; 99 int (*check)(const uintptr_t spec); 100 }; 101 102 static const struct plat_io_policy policies[] = { 103 [BL2_IMAGE_ID] = { 104 .dev_handle = &dummy_dev_handle, 105 .image_spec = (uintptr_t)&bl2_block_spec, 106 .check = open_dummy 107 }, 108 [BL32_IMAGE_ID] = { 109 .dev_handle = &dummy_dev_handle, 110 .image_spec = (uintptr_t)&bl32_block_spec, 111 .check = open_dummy 112 }, 113 [BL33_IMAGE_ID] = { 114 .dev_handle = &image_dev_handle, 115 .image_spec = (uintptr_t)&bl33_partition_spec, 116 .check = open_image 117 }, 118 [GPT_IMAGE_ID] = { 119 .dev_handle = &storage_dev_handle, 120 .image_spec = (uintptr_t)&gpt_block_spec, 121 .check = open_storage 122 }, 123 [STM32_IMAGE_ID] = { 124 .dev_handle = &storage_dev_handle, 125 .image_spec = (uintptr_t)&stm32image_block_spec, 126 .check = open_storage 127 } 128 }; 129 130 static int open_dummy(const uintptr_t spec) 131 { 132 return io_dev_init(dummy_dev_handle, 0); 133 } 134 135 static int open_image(const uintptr_t spec) 136 { 137 return io_dev_init(image_dev_handle, 0); 138 } 139 140 static int open_storage(const uintptr_t spec) 141 { 142 return io_dev_init(storage_dev_handle, 0); 143 } 144 145 static void print_boot_device(boot_api_context_t *boot_context) 146 { 147 switch (boot_context->boot_interface_selected) { 148 case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_SD: 149 INFO("Using SDMMC\n"); 150 break; 151 case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_EMMC: 152 INFO("Using EMMC\n"); 153 break; 154 default: 155 ERROR("Boot interface not found\n"); 156 panic(); 157 break; 158 } 159 160 if (boot_context->boot_interface_instance != 0U) { 161 INFO(" Instance %d\n", boot_context->boot_interface_instance); 162 } 163 } 164 165 static void boot_mmc(enum mmc_device_type mmc_dev_type, 166 uint16_t boot_interface_instance) 167 { 168 int io_result __unused; 169 uint8_t idx; 170 struct stm32image_part_info *part; 171 struct stm32_sdmmc2_params params; 172 struct mmc_device_info device_info; 173 const partition_entry_t *entry; 174 175 zeromem(&device_info, sizeof(struct mmc_device_info)); 176 zeromem(¶ms, sizeof(struct stm32_sdmmc2_params)); 177 178 device_info.mmc_dev_type = mmc_dev_type; 179 180 switch (boot_interface_instance) { 181 case 1: 182 params.reg_base = STM32MP_SDMMC1_BASE; 183 break; 184 case 2: 185 params.reg_base = STM32MP_SDMMC2_BASE; 186 break; 187 case 3: 188 params.reg_base = STM32MP_SDMMC3_BASE; 189 break; 190 default: 191 WARN("SDMMC instance not found, using default\n"); 192 if (mmc_dev_type == MMC_IS_SD) { 193 params.reg_base = STM32MP_SDMMC1_BASE; 194 } else { 195 params.reg_base = STM32MP_SDMMC2_BASE; 196 } 197 break; 198 } 199 200 params.device_info = &device_info; 201 if (stm32_sdmmc2_mmc_init(¶ms) != 0) { 202 ERROR("SDMMC%u init failed\n", boot_interface_instance); 203 panic(); 204 } 205 206 /* Open MMC as a block device to read GPT table */ 207 io_result = register_io_dev_block(&mmc_dev_con); 208 if (io_result != 0) { 209 panic(); 210 } 211 212 io_result = io_dev_open(mmc_dev_con, (uintptr_t)&mmc_block_dev_spec, 213 &storage_dev_handle); 214 assert(io_result == 0); 215 216 partition_init(GPT_IMAGE_ID); 217 218 io_result = io_dev_close(storage_dev_handle); 219 assert(io_result == 0); 220 221 stm32image_dev_info_spec.device_size = 222 stm32_sdmmc2_mmc_get_device_size(); 223 224 for (idx = 0U; idx < IMG_IDX_NUM; idx++) { 225 part = &stm32image_dev_info_spec.part_info[idx]; 226 entry = get_partition_entry(part->name); 227 if (entry == NULL) { 228 ERROR("Partition %s not found\n", part->name); 229 panic(); 230 } 231 232 part->part_offset = entry->start; 233 part->bkp_offset = 0U; 234 } 235 236 /* 237 * Re-open MMC with io_mmc, for better perfs compared to 238 * io_block. 239 */ 240 io_result = register_io_dev_mmc(&mmc_dev_con); 241 assert(io_result == 0); 242 243 io_result = io_dev_open(mmc_dev_con, 0, &storage_dev_handle); 244 assert(io_result == 0); 245 246 io_result = register_io_dev_stm32image(&stm32image_dev_con); 247 assert(io_result == 0); 248 249 io_result = io_dev_open(stm32image_dev_con, 250 (uintptr_t)&stm32image_dev_info_spec, 251 &image_dev_handle); 252 assert(io_result == 0); 253 } 254 255 void stm32mp_io_setup(void) 256 { 257 int io_result __unused; 258 boot_api_context_t *boot_context = 259 (boot_api_context_t *)stm32mp_get_boot_ctx_address(); 260 261 print_boot_device(boot_context); 262 263 if ((boot_context->boot_partition_used_toboot == 1U) || 264 (boot_context->boot_partition_used_toboot == 2U)) { 265 INFO("Boot used partition fsbl%d\n", 266 boot_context->boot_partition_used_toboot); 267 } 268 269 io_result = register_io_dev_dummy(&dummy_dev_con); 270 assert(io_result == 0); 271 272 io_result = io_dev_open(dummy_dev_con, dummy_dev_spec, 273 &dummy_dev_handle); 274 assert(io_result == 0); 275 276 switch (boot_context->boot_interface_selected) { 277 case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_SD: 278 dmbsy(); 279 boot_mmc(MMC_IS_SD, boot_context->boot_interface_instance); 280 break; 281 case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_EMMC: 282 dmbsy(); 283 boot_mmc(MMC_IS_EMMC, boot_context->boot_interface_instance); 284 break; 285 286 default: 287 ERROR("Boot interface %d not supported\n", 288 boot_context->boot_interface_selected); 289 break; 290 } 291 } 292 293 /* 294 * Return an IO device handle and specification which can be used to access 295 * an image. Use this to enforce platform load policy. 296 */ 297 int plat_get_image_source(unsigned int image_id, uintptr_t *dev_handle, 298 uintptr_t *image_spec) 299 { 300 int rc; 301 const struct plat_io_policy *policy; 302 303 assert(image_id < ARRAY_SIZE(policies)); 304 305 policy = &policies[image_id]; 306 rc = policy->check(policy->image_spec); 307 if (rc == 0) { 308 *image_spec = policy->image_spec; 309 *dev_handle = *(policy->dev_handle); 310 } 311 312 return rc; 313 } 314