drivers/dfu/dfu_mmc.c

   1 /*
   2  * dfu.c -- DFU back-end routines
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  * author: Lukasz Majewski <l.majewski@samsung.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <malloc.h>
  12 #include <errno.h>
  13 #include <div64.h>
  14 #include <dfu.h>
  15 #include <ext4fs.h>
  16 #include <fat.h>
  17 #include <mmc.h>
  18
  19 static unsigned char *dfu_file_buf;
  20 static long dfu_file_buf_len;
  21 static long dfu_file_buf_filled;
  22
  23 static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu,
  24                         u64 offset, void *buf, long *len)
  25 {
  26         struct mmc *mmc;
  27         u32 blk_start, blk_count, n = 0;
  28         int ret, part_num_bkp = 0;
  29
  30         mmc = find_mmc_device(dfu->data.mmc.dev_num);
  31         if (!mmc) {
  32                 error("Device MMC %d - not found!", dfu->data.mmc.dev_num);
  33                 return -ENODEV;
  34         }
  35
  36         /*
  37          * We must ensure that we work in lba_blk_size chunks, so ALIGN
  38          * this value.
  39          */
  40         *len = ALIGN(*len, dfu->data.mmc.lba_blk_size);
  41
  42         blk_start = dfu->data.mmc.lba_start +
  43                         (u32)lldiv(offset, dfu->data.mmc.lba_blk_size);
  44         blk_count = *len / dfu->data.mmc.lba_blk_size;
  45         if (blk_start + blk_count >
  46                         dfu->data.mmc.lba_start + dfu->data.mmc.lba_size) {
  47                 puts("Request would exceed designated area!\n");
  48                 return -EINVAL;
  49         }
  50
  51         if (dfu->data.mmc.hw_partition >= 0) {
  52                 part_num_bkp = mmc_get_blk_desc(mmc)->hwpart;
  53                 ret = blk_select_hwpart_devnum(IF_TYPE_MMC,
  54                                                dfu->data.mmc.dev_num,
  55                                                dfu->data.mmc.hw_partition);
  56                 if (ret)
  57                         return ret;
  58         }
  59
  60         debug("%s: %s dev: %d start: %d cnt: %d buf: 0x%p\n", __func__,
  61               op == DFU_OP_READ ? "MMC READ" : "MMC WRITE",
  62               dfu->data.mmc.dev_num, blk_start, blk_count, buf);
  63         switch (op) {
  64         case DFU_OP_READ:
  65                 n = blk_dread(mmc_get_blk_desc(mmc), blk_start, blk_count, buf);
  66                 break;
  67         case DFU_OP_WRITE:
  68                 n = blk_dwrite(mmc_get_blk_desc(mmc), blk_start, blk_count,
  69                                buf);
  70                 break;
  71         default:
  72                 error("Operation not supported\n");
  73         }
  74
  75         if (n != blk_count) {
  76                 error("MMC operation failed");
  77                 if (dfu->data.mmc.hw_partition >= 0)
  78                         blk_select_hwpart_devnum(IF_TYPE_MMC,
  79                                                  dfu->data.mmc.dev_num,
  80                                                  part_num_bkp);
  81                 return -EIO;
  82         }
  83
  84         if (dfu->data.mmc.hw_partition >= 0) {
  85                 ret = blk_select_hwpart_devnum(IF_TYPE_MMC,
  86                                                dfu->data.mmc.dev_num,
  87                                                part_num_bkp);
  88                 if (ret)
  89                         return ret;
  90         }
  91
  92         return 0;
  93 }
  94
  95 static int mmc_file_buffer(struct dfu_entity *dfu, void *buf, long *len)
  96 {
  97         if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) {
  98                 dfu_file_buf_len = 0;
  99                 return -EINVAL;
 100         }
 101
 102         /* Add to the current buffer. */
 103         memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len);
 104         dfu_file_buf_len += *len;
 105
 106         return 0;
 107 }
 108
 109 static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu,
 110                         void *buf, long *len)
 111 {
 112         const char *fsname, *opname;
 113         char cmd_buf[DFU_CMD_BUF_SIZE];
 114         char *str_env;
 115         int ret;
 116
 117         switch (dfu->layout) {
 118         case DFU_FS_FAT:
 119                 fsname = "fat";
 120                 break;
 121         case DFU_FS_EXT4:
 122                 fsname = "ext4";
 123                 break;
 124         default:
 125                 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
 126                        dfu_get_layout(dfu->layout));
 127                 return -1;
 128         }
 129
 130         switch (op) {
 131         case DFU_OP_READ:
 132                 opname = "load";
 133                 break;
 134         case DFU_OP_WRITE:
 135                 opname = "write";
 136                 break;
 137         case DFU_OP_SIZE:
 138                 opname = "size";
 139                 break;
 140         default:
 141                 return -1;
 142         }
 143
 144         sprintf(cmd_buf, "%s%s mmc %d:%d", fsname, opname,
 145                 dfu->data.mmc.dev, dfu->data.mmc.part);
 146
 147         if (op != DFU_OP_SIZE)
 148                 sprintf(cmd_buf + strlen(cmd_buf), " %p", buf);
 149
 150         sprintf(cmd_buf + strlen(cmd_buf), " %s", dfu->name);
 151
 152         if (op == DFU_OP_WRITE)
 153                 sprintf(cmd_buf + strlen(cmd_buf), " %lx", *len);
 154
 155         debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
 156
 157         ret = run_command(cmd_buf, 0);
 158         if (ret) {
 159                 puts("dfu: Read error!\n");
 160                 return ret;
 161         }
 162
 163         if (op != DFU_OP_WRITE) {
 164                 str_env = getenv("filesize");
 165                 if (str_env == NULL) {
 166                         puts("dfu: Wrong file size!\n");
 167                         return -1;
 168                 }
 169                 *len = simple_strtoul(str_env, NULL, 16);
 170         }
 171
 172         return ret;
 173 }
 174
 175 int dfu_write_medium_mmc(struct dfu_entity *dfu,
 176                 u64 offset, void *buf, long *len)
 177 {
 178         int ret = -1;
 179
 180         switch (dfu->layout) {
 181         case DFU_RAW_ADDR:
 182                 ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
 183                 break;
 184         case DFU_FS_FAT:
 185         case DFU_FS_EXT4:
 186                 ret = mmc_file_buffer(dfu, buf, len);
 187                 break;
 188         default:
 189                 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
 190                        dfu_get_layout(dfu->layout));
 191         }
 192
 193         return ret;
 194 }
 195
 196 int dfu_flush_medium_mmc(struct dfu_entity *dfu)
 197 {
 198         int ret = 0;
 199
 200         if (dfu->layout != DFU_RAW_ADDR) {
 201                 /* Do stuff here. */
 202                 ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf,
 203                                 &dfu_file_buf_len);
 204
 205                 /* Now that we're done */
 206                 dfu_file_buf_len = 0;
 207         }
 208
 209         return ret;
 210 }
 211
 212 long dfu_get_medium_size_mmc(struct dfu_entity *dfu)
 213 {
 214         int ret;
 215         long len;
 216
 217         switch (dfu->layout) {
 218         case DFU_RAW_ADDR:
 219                 return dfu->data.mmc.lba_size * dfu->data.mmc.lba_blk_size;
 220         case DFU_FS_FAT:
 221         case DFU_FS_EXT4:
 222                 dfu_file_buf_filled = -1;
 223                 ret = mmc_file_op(DFU_OP_SIZE, dfu, NULL, &len);
 224                 if (ret < 0)
 225                         return ret;
 226                 if (len > CONFIG_SYS_DFU_MAX_FILE_SIZE)
 227                         return -1;
 228                 return len;
 229         default:
 230                 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
 231                        dfu_get_layout(dfu->layout));
 232                 return -1;
 233         }
 234 }
 235
 236 static int mmc_file_unbuffer(struct dfu_entity *dfu, u64 offset, void *buf,
 237                              long *len)
 238 {
 239         int ret;
 240         long file_len;
 241
 242         if (dfu_file_buf_filled == -1) {
 243                 ret = mmc_file_op(DFU_OP_READ, dfu, dfu_file_buf, &file_len);
 244                 if (ret < 0)
 245                         return ret;
 246                 dfu_file_buf_filled = file_len;
 247         }
 248         if (offset + *len > dfu_file_buf_filled)
 249                 return -EINVAL;
 250
 251         /* Add to the current buffer. */
 252         memcpy(buf, dfu_file_buf + offset, *len);
 253
 254         return 0;
 255 }
 256
 257 int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf,
 258                 long *len)
 259 {
 260         int ret = -1;
 261
 262         switch (dfu->layout) {
 263         case DFU_RAW_ADDR:
 264                 ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len);
 265                 break;
 266         case DFU_FS_FAT:
 267         case DFU_FS_EXT4:
 268                 ret = mmc_file_unbuffer(dfu, offset, buf, len);
 269                 break;
 270         default:
 271                 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
 272                        dfu_get_layout(dfu->layout));
 273         }
 274
 275         return ret;
 276 }
 277
 278 void dfu_free_entity_mmc(struct dfu_entity *dfu)
 279 {
 280         if (dfu_file_buf) {
 281                 free(dfu_file_buf);
 282                 dfu_file_buf = NULL;
 283         }
 284 }
 285
 286 /*
 287  * @param s Parameter string containing space-separated arguments:
 288  *      1st:
 289  *              raw     (raw read/write)
 290  *              fat     (files)
 291  *              ext4    (^)
 292  *              part    (partition image)
 293  *      2nd and 3rd:
 294  *              lba_start and lba_size, for raw write
 295  *              mmc_dev and mmc_part, for filesystems and part
 296  *      4th (optional):
 297  *              mmcpart <num> (access to HW eMMC partitions)
 298  */
 299 int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s)
 300 {
 301         const char *entity_type;
 302         size_t second_arg;
 303         size_t third_arg;
 304
 305         struct mmc *mmc;
 306
 307         const char *argv[3];
 308         const char **parg = argv;
 309
 310         dfu->data.mmc.dev_num = simple_strtoul(devstr, NULL, 10);
 311
 312         for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
 313                 *parg = strsep(&s, " ");
 314                 if (*parg == NULL) {
 315                         error("Invalid number of arguments.\n");
 316                         return -ENODEV;
 317                 }
 318         }
 319
 320         entity_type = argv[0];
 321         /*
 322          * Base 0 means we'll accept (prefixed with 0x or 0) base 16, 8,
 323          * with default 10.
 324          */
 325         second_arg = simple_strtoul(argv[1], NULL, 0);
 326         third_arg = simple_strtoul(argv[2], NULL, 0);
 327
 328         mmc = find_mmc_device(dfu->data.mmc.dev_num);
 329         if (mmc == NULL) {
 330                 error("Couldn't find MMC device no. %d.\n",
 331                       dfu->data.mmc.dev_num);
 332                 return -ENODEV;
 333         }
 334
 335         if (mmc_init(mmc)) {
 336                 error("Couldn't init MMC device.\n");
 337                 return -ENODEV;
 338         }
 339
 340         dfu->data.mmc.hw_partition = -EINVAL;
 341         if (!strcmp(entity_type, "raw")) {
 342                 dfu->layout                     = DFU_RAW_ADDR;
 343                 dfu->data.mmc.lba_start         = second_arg;
 344                 dfu->data.mmc.lba_size          = third_arg;
 345                 dfu->data.mmc.lba_blk_size      = mmc->read_bl_len;
 346
 347                 /*
 348                  * Check for an extra entry at dfu_alt_info env variable
 349                  * specifying the mmc HW defined partition number
 350                  */
 351                 if (s)
 352                         if (!strcmp(strsep(&s, " "), "mmcpart"))
 353                                 dfu->data.mmc.hw_partition =
 354                                         simple_strtoul(s, NULL, 0);
 355
 356         } else if (!strcmp(entity_type, "part")) {
 357                 disk_partition_t partinfo;
 358                 struct blk_desc *blk_dev = mmc_get_blk_desc(mmc);
 359                 int mmcdev = second_arg;
 360                 int mmcpart = third_arg;
 361
 362                 if (part_get_info(blk_dev, mmcpart, &partinfo) != 0) {
 363                         error("Couldn't find part #%d on mmc device #%d\n",
 364                               mmcpart, mmcdev);
 365                         return -ENODEV;
 366                 }
 367
 368                 dfu->layout                     = DFU_RAW_ADDR;
 369                 dfu->data.mmc.lba_start         = partinfo.start;
 370                 dfu->data.mmc.lba_size          = partinfo.size;
 371                 dfu->data.mmc.lba_blk_size      = partinfo.blksz;
 372         } else if (!strcmp(entity_type, "fat")) {
 373                 dfu->layout = DFU_FS_FAT;
 374         } else if (!strcmp(entity_type, "ext4")) {
 375                 dfu->layout = DFU_FS_EXT4;
 376         } else {
 377                 error("Memory layout (%s) not supported!\n", entity_type);
 378                 return -ENODEV;
 379         }
 380
 381         /* if it's NOT a raw write */
 382         if (strcmp(entity_type, "raw")) {
 383                 dfu->data.mmc.dev = second_arg;
 384                 dfu->data.mmc.part = third_arg;
 385         }
 386
 387         dfu->dev_type = DFU_DEV_MMC;
 388         dfu->get_medium_size = dfu_get_medium_size_mmc;
 389         dfu->read_medium = dfu_read_medium_mmc;
 390         dfu->write_medium = dfu_write_medium_mmc;
 391         dfu->flush_medium = dfu_flush_medium_mmc;
 392         dfu->inited = 0;
 393         dfu->free_entity = dfu_free_entity_mmc;
 394
 395         /* Check if file buffer is ready */
 396         if (!dfu_file_buf) {
 397                 dfu_file_buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
 398                                         CONFIG_SYS_DFU_MAX_FILE_SIZE);
 399                 if (!dfu_file_buf) {
 400                         error("Could not memalign 0x%x bytes",
 401                               CONFIG_SYS_DFU_MAX_FILE_SIZE);
 402                         return -ENOMEM;
 403                 }
 404         }
 405
 406         return 0;
 407 }