common/spl/spl_mmc.c

   1 /*
   2  * (C) Copyright 2010
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Aneesh V <aneesh@ti.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <spl.h>
  12 #include <linux/compiler.h>
  13 #include <errno.h>
  14 #include <asm/u-boot.h>
  15 #include <errno.h>
  16 #include <mmc.h>
  17 #include <image.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 static int mmc_load_legacy(struct mmc *mmc, ulong sector,
  22                            struct image_header *header)
  23 {
  24         u32 image_size_sectors;
  25         unsigned long count;
  26         int ret;
  27
  28         ret = spl_parse_image_header(header);
  29         if (ret)
  30                 return ret;
  31
  32         /* convert size to sectors - round up */
  33         image_size_sectors = (spl_image.size + mmc->read_bl_len - 1) /
  34                              mmc->read_bl_len;
  35
  36         /* Read the header too to avoid extra memcpy */
  37         count = blk_dread(mmc_get_blk_desc(mmc), sector, image_size_sectors,
  38                           (void *)(ulong)spl_image.load_addr);
  39         debug("read %x sectors to %x\n", image_size_sectors,
  40               spl_image.load_addr);
  41         if (count != image_size_sectors)
  42                 return -EIO;
  43
  44         return 0;
  45 }
  46
  47 static ulong h_spl_load_read(struct spl_load_info *load, ulong sector,
  48                              ulong count, void *buf)
  49 {
  50         struct mmc *mmc = load->dev;
  51
  52         return blk_dread(mmc_get_blk_desc(mmc), sector, count, buf);
  53 }
  54
  55 static int mmc_load_image_raw_sector(struct mmc *mmc, unsigned long sector)
  56 {
  57         unsigned long count;
  58         struct image_header *header;
  59         int ret = 0;
  60
  61         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
  62                                          sizeof(struct image_header));
  63
  64         /* read image header to find the image size & load address */
  65         count = blk_dread(mmc_get_blk_desc(mmc), sector, 1, header);
  66         debug("hdr read sector %lx, count=%lu\n", sector, count);
  67         if (count == 0) {
  68                 ret = -EIO;
  69                 goto end;
  70         }
  71
  72         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  73             image_get_magic(header) == FDT_MAGIC) {
  74                 struct spl_load_info load;
  75
  76                 debug("Found FIT\n");
  77                 load.dev = mmc;
  78                 load.priv = NULL;
  79                 load.filename = NULL;
  80                 load.bl_len = mmc->read_bl_len;
  81                 load.read = h_spl_load_read;
  82                 ret = spl_load_simple_fit(&load, sector, header);
  83         } else {
  84                 ret = mmc_load_legacy(mmc, sector, header);
  85         }
  86
  87 end:
  88         if (ret) {
  89 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  90                 puts("mmc_load_image_raw_sector: mmc block read error\n");
  91 #endif
  92                 return -1;
  93         }
  94
  95         return 0;
  96 }
  97
  98 int spl_mmc_get_device_index(u32 boot_device)
  99 {
 100         switch (boot_device) {
 101         case BOOT_DEVICE_MMC1:
 102                 return 0;
 103         case BOOT_DEVICE_MMC2:
 104         case BOOT_DEVICE_MMC2_2:
 105                 return 1;
 106         }
 107
 108 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 109         printf("spl: unsupported mmc boot device.\n");
 110 #endif
 111
 112         return -ENODEV;
 113 }
 114
 115 static int spl_mmc_find_device(struct mmc **mmcp, u32 boot_device)
 116 {
 117 #ifdef CONFIG_DM_MMC
 118         struct udevice *dev;
 119 #endif
 120         int err, mmc_dev;
 121
 122         mmc_dev = spl_mmc_get_device_index(boot_device);
 123         if (mmc_dev < 0)
 124                 return mmc_dev;
 125
 126         err = mmc_initialize(NULL);
 127         if (err) {
 128 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 129                 printf("spl: could not initialize mmc. error: %d\n", err);
 130 #endif
 131                 return err;
 132         }
 133
 134 #ifdef CONFIG_DM_MMC
 135         err = uclass_get_device(UCLASS_MMC, mmc_dev, &dev);
 136         if (!err)
 137                 *mmcp = mmc_get_mmc_dev(dev);
 138 #else
 139         *mmcp = find_mmc_device(mmc_dev);
 140         err = *mmcp ? 0 : -ENODEV;
 141 #endif
 142         if (err) {
 143 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 144                 printf("spl: could not find mmc device. error: %d\n", err);
 145 #endif
 146                 return err;
 147         }
 148
 149         return 0;
 150 }
 151
 152 #ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
 153 static int mmc_load_image_raw_partition(struct mmc *mmc, int partition)
 154 {
 155         disk_partition_t info;
 156         int err;
 157
 158         err = part_get_info(&mmc->block_dev, partition, &info);
 159         if (err) {
 160 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 161                 puts("spl: partition error\n");
 162 #endif
 163                 return -1;
 164         }
 165
 166 #ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
 167         return mmc_load_image_raw_sector(mmc, info.start +
 168                                          CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR);
 169 #else
 170         return mmc_load_image_raw_sector(mmc, info.start);
 171 #endif
 172 }
 173 #else
 174 #define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION -1
 175 static int mmc_load_image_raw_partition(struct mmc *mmc, int partition)
 176 {
 177         return -ENOSYS;
 178 }
 179 #endif
 180
 181 #ifdef CONFIG_SPL_OS_BOOT
 182 static int mmc_load_image_raw_os(struct mmc *mmc)
 183 {
 184         unsigned long count;
 185         int ret;
 186
 187         count = mmc->block_dev.block_read(&mmc->block_dev,
 188                 CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR,
 189                 CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS,
 190                 (void *) CONFIG_SYS_SPL_ARGS_ADDR);
 191         if (count == 0) {
 192 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 193                 puts("mmc_load_image_raw_os: mmc block read error\n");
 194 #endif
 195                 return -1;
 196         }
 197
 198         ret = mmc_load_image_raw_sector(mmc,
 199                 CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR);
 200         if (ret)
 201                 return ret;
 202
 203         if (spl_image.os != IH_OS_LINUX) {
 204                 puts("Expected Linux image is not found. Trying to start U-boot\n");
 205                 return -ENOENT;
 206         }
 207
 208         return 0;
 209 }
 210 #else
 211 int spl_start_uboot(void)
 212 {
 213         return 1;
 214 }
 215 static int mmc_load_image_raw_os(struct mmc *mmc)
 216 {
 217         return -ENOSYS;
 218 }
 219 #endif
 220
 221 #ifdef CONFIG_SYS_MMCSD_FS_BOOT_PARTITION
 222 int spl_mmc_do_fs_boot(struct mmc *mmc)
 223 {
 224         int err = -ENOSYS;
 225
 226 #ifdef CONFIG_SPL_FAT_SUPPORT
 227         if (!spl_start_uboot()) {
 228                 err = spl_load_image_fat_os(&mmc->block_dev,
 229                         CONFIG_SYS_MMCSD_FS_BOOT_PARTITION);
 230                 if (!err)
 231                         return err;
 232         }
 233 #ifdef CONFIG_SPL_FS_LOAD_PAYLOAD_NAME
 234         err = spl_load_image_fat(&mmc->block_dev,
 235                                  CONFIG_SYS_MMCSD_FS_BOOT_PARTITION,
 236                                  CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
 237         if (!err)
 238                 return err;
 239 #endif
 240 #endif
 241 #ifdef CONFIG_SPL_EXT_SUPPORT
 242         if (!spl_start_uboot()) {
 243                 err = spl_load_image_ext_os(&mmc->block_dev,
 244                         CONFIG_SYS_MMCSD_FS_BOOT_PARTITION);
 245                 if (!err)
 246                         return err;
 247         }
 248 #ifdef CONFIG_SPL_FS_LOAD_PAYLOAD_NAME
 249         err = spl_load_image_ext(&mmc->block_dev,
 250                                  CONFIG_SYS_MMCSD_FS_BOOT_PARTITION,
 251                                  CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
 252         if (!err)
 253                 return err;
 254 #endif
 255 #endif
 256
 257 #if defined(CONFIG_SPL_FAT_SUPPORT) || defined(CONFIG_SPL_EXT_SUPPORT)
 258         err = -ENOENT;
 259 #endif
 260
 261         return err;
 262 }
 263 #else
 264 int spl_mmc_do_fs_boot(struct mmc *mmc)
 265 {
 266         return -ENOSYS;
 267 }
 268 #endif
 269
 270 int spl_mmc_load_image(u32 boot_device)
 271 {
 272         struct mmc *mmc = NULL;
 273         u32 boot_mode;
 274         int err = 0;
 275         __maybe_unused int part;
 276
 277         err = spl_mmc_find_device(&mmc, boot_device);
 278         if (err)
 279                 return err;
 280
 281         err = mmc_init(mmc);
 282         if (err) {
 283 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 284                 printf("spl: mmc init failed with error: %d\n", err);
 285 #endif
 286                 return err;
 287         }
 288
 289         boot_mode = spl_boot_mode(boot_device);
 290         err = -EINVAL;
 291         switch (boot_mode) {
 292         case MMCSD_MODE_EMMCBOOT:
 293                         /*
 294                          * We need to check what the partition is configured to.
 295                          * 1 and 2 match up to boot0 / boot1 and 7 is user data
 296                          * which is the first physical partition (0).
 297                          */
 298                         part = (mmc->part_config >> 3) & PART_ACCESS_MASK;
 299
 300                         if (part == 7)
 301                                 part = 0;
 302
 303                         err = blk_dselect_hwpart(mmc_get_blk_desc(mmc), part);
 304                         if (err) {
 305 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 306                                 puts("spl: mmc partition switch failed\n");
 307 #endif
 308                                 return err;
 309                         }
 310                         /* Fall through */
 311         case MMCSD_MODE_RAW:
 312                 debug("spl: mmc boot mode: raw\n");
 313
 314                 if (!spl_start_uboot()) {
 315                         err = mmc_load_image_raw_os(mmc);
 316                         if (!err)
 317                                 return err;
 318                 }
 319
 320                 err = mmc_load_image_raw_partition(mmc,
 321                         CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION);
 322                 if (!err)
 323                         return err;
 324 #if defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR)
 325                 err = mmc_load_image_raw_sector(mmc,
 326                         CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR);
 327                 if (!err)
 328                         return err;
 329 #endif
 330                 /* If RAW mode fails, try FS mode. */
 331         case MMCSD_MODE_FS:
 332                 debug("spl: mmc boot mode: fs\n");
 333
 334                 err = spl_mmc_do_fs_boot(mmc);
 335                 if (!err)
 336                         return err;
 337
 338                 break;
 339         case MMCSD_MODE_UNDEFINED:
 340 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 341         default:
 342                 puts("spl: mmc: wrong boot mode\n");
 343 #endif
 344         }
 345
 346         return err;
 347 }