board/toradex/common/tdx-cfg-block.c

   1 /*
   2  * Copyright (c) 2016 Toradex, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include "tdx-cfg-block.h"
   9
  10 #if defined(CONFIG_TARGET_APALIS_IMX6) || defined(CONFIG_TARGET_COLIBRI_IMX6)
  11 #include <asm/arch/sys_proto.h>
  12 #else
  13 #define is_cpu_type(cpu) (0)
  14 #endif
  15 #if defined(CONFIG_CPU_PXA27X)
  16 #include <asm/arch-pxa/pxa.h>
  17 #else
  18 #define cpu_is_pxa27x(cpu) (0)
  19 #endif
  20 #include <cli.h>
  21 #include <console.h>
  22 #include <flash.h>
  23 #include <malloc.h>
  24 #include <mmc.h>
  25 #include <nand.h>
  26 #include <asm/mach-types.h>
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 #define TAG_VALID       0xcf01
  31 #define TAG_MAC         0x0000
  32 #define TAG_HW          0x0008
  33 #define TAG_INVALID     0xffff
  34
  35 #define TAG_FLAG_VALID  0x1
  36
  37 #if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
  38 #define TDX_CFG_BLOCK_MAX_SIZE 512
  39 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
  40 #define TDX_CFG_BLOCK_MAX_SIZE 64
  41 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
  42 #define TDX_CFG_BLOCK_MAX_SIZE 64
  43 #else
  44 #error Toradex config block location not set
  45 #endif
  46
  47 struct toradex_tag {
  48         u32 len:14;
  49         u32 flags:2;
  50         u32 id:16;
  51 };
  52
  53 bool valid_cfgblock;
  54 struct toradex_hw tdx_hw_tag;
  55 struct toradex_eth_addr tdx_eth_addr;
  56 u32 tdx_serial;
  57
  58 const char * const toradex_modules[] = {
  59          [0] = "UNKNOWN MODULE",
  60          [1] = "Colibri PXA270 312MHz",
  61          [2] = "Colibri PXA270 520MHz",
  62          [3] = "Colibri PXA320 806MHz",
  63          [4] = "Colibri PXA300 208MHz",
  64          [5] = "Colibri PXA310 624MHz",
  65          [6] = "Colibri PXA320 806MHz IT",
  66          [7] = "Colibri PXA300 208MHz XT",
  67          [8] = "Colibri PXA270 312MHz",
  68          [9] = "Colibri PXA270 520MHz",
  69         [10] = "Colibri VF50 128MB", /* not currently on sale */
  70         [11] = "Colibri VF61 256MB",
  71         [12] = "Colibri VF61 256MB IT",
  72         [13] = "Colibri VF50 128MB IT",
  73         [14] = "Colibri iMX6 Solo 256MB",
  74         [15] = "Colibri iMX6 DualLite 512MB",
  75         [16] = "Colibri iMX6 Solo 256MB IT",
  76         [17] = "Colibri iMX6 DualLite 512MB IT",
  77         [18] = "UNKNOWN MODULE",
  78         [19] = "UNKNOWN MODULE",
  79         [20] = "Colibri T20 256MB",
  80         [21] = "Colibri T20 512MB",
  81         [22] = "Colibri T20 512MB IT",
  82         [23] = "Colibri T30 1GB",
  83         [24] = "Colibri T20 256MB IT",
  84         [25] = "Apalis T30 2GB",
  85         [26] = "Apalis T30 1GB",
  86         [27] = "Apalis iMX6 Quad 1GB",
  87         [28] = "Apalis iMX6 Quad 2GB IT",
  88         [29] = "Apalis iMX6 Dual 512MB",
  89         [30] = "Colibri T30 1GB IT",
  90         [31] = "Apalis T30 1GB IT",
  91         [32] = "Colibri iMX7 Solo 256MB",
  92         [33] = "Colibri iMX7 Dual 512MB",
  93         [34] = "Apalis TK1 2GB",
  94         [35] = "Apalis iMX6 Dual 1GB IT",
  95 };
  96
  97 #ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_MMC
  98 static int tdx_cfg_block_mmc_storage(u8 *config_block, int write)
  99 {
 100         struct mmc *mmc;
 101         int dev = CONFIG_TDX_CFG_BLOCK_DEV;
 102         int offset = CONFIG_TDX_CFG_BLOCK_OFFSET;
 103         uint part = CONFIG_TDX_CFG_BLOCK_PART;
 104         uint blk_start;
 105         int ret = 0;
 106
 107         /* Read production parameter config block from eMMC */
 108         mmc = find_mmc_device(dev);
 109         if (!mmc) {
 110                 puts("No MMC card found\n");
 111                 ret = -ENODEV;
 112                 goto out;
 113         }
 114         if (part != mmc_get_blk_desc(mmc)->hwpart) {
 115                 if (blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part)) {
 116                         puts("MMC partition switch failed\n");
 117                         ret = -ENODEV;
 118                         goto out;
 119                 }
 120         }
 121         if (offset < 0)
 122                 offset += mmc->capacity;
 123         blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
 124
 125         if (!write) {
 126                 /* Careful reads a whole block of 512 bytes into config_block */
 127                 if (blk_dread(mmc_get_blk_desc(mmc), blk_start, 1,
 128                               (unsigned char *)config_block) != 1) {
 129                         ret = -EIO;
 130                         goto out;
 131                 }
 132                 /* Flush cache after read */
 133                 flush_cache((ulong)(unsigned char *)config_block, 512);
 134         } else {
 135                 /* Just writing one 512 byte block */
 136                 if (blk_dwrite(mmc_get_blk_desc(mmc), blk_start, 1,
 137                                (unsigned char *)config_block) != 1) {
 138                         ret = -EIO;
 139                         goto out;
 140                 }
 141         }
 142
 143 out:
 144         /* Switch back to regular eMMC user partition */
 145         blk_select_hwpart_devnum(IF_TYPE_MMC, 0, 0);
 146
 147         return ret;
 148 }
 149 #endif
 150
 151 #ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_NAND
 152 static int read_tdx_cfg_block_from_nand(unsigned char *config_block)
 153 {
 154         size_t size = TDX_CFG_BLOCK_MAX_SIZE;
 155
 156         /* Read production parameter config block from NAND page */
 157         return nand_read_skip_bad(nand_info[0], CONFIG_TDX_CFG_BLOCK_OFFSET,
 158                          &size, NULL, TDX_CFG_BLOCK_MAX_SIZE, config_block);
 159 }
 160
 161 static int write_tdx_cfg_block_to_nand(unsigned char *config_block)
 162 {
 163         size_t size = TDX_CFG_BLOCK_MAX_SIZE;
 164
 165         /* Write production parameter config block to NAND page */
 166         return nand_write_skip_bad(nand_info[0], CONFIG_TDX_CFG_BLOCK_OFFSET,
 167                                    &size, NULL, TDX_CFG_BLOCK_MAX_SIZE,
 168                                    config_block, WITH_WR_VERIFY);
 169 }
 170 #endif
 171
 172 #ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_NOR
 173 static int read_tdx_cfg_block_from_nor(unsigned char *config_block)
 174 {
 175         /* Read production parameter config block from NOR flash */
 176         memcpy(config_block, (void *)CONFIG_TDX_CFG_BLOCK_OFFSET,
 177                TDX_CFG_BLOCK_MAX_SIZE);
 178         return 0;
 179 }
 180
 181 static int write_tdx_cfg_block_to_nor(unsigned char *config_block)
 182 {
 183         /* Write production parameter config block to NOR flash */
 184         return flash_write((void *)config_block, CONFIG_TDX_CFG_BLOCK_OFFSET,
 185                            TDX_CFG_BLOCK_MAX_SIZE);
 186 }
 187 #endif
 188
 189 int read_tdx_cfg_block(void)
 190 {
 191         int ret = 0;
 192         u8 *config_block = NULL;
 193         struct toradex_tag *tag;
 194         size_t size = TDX_CFG_BLOCK_MAX_SIZE;
 195         int offset;
 196
 197         /* Allocate RAM area for config block */
 198         config_block = memalign(ARCH_DMA_MINALIGN, size);
 199         if (!config_block) {
 200                 printf("Not enough malloc space available!\n");
 201                 return -ENOMEM;
 202         }
 203
 204         memset(config_block, 0, size);
 205
 206 #if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
 207         ret = tdx_cfg_block_mmc_storage(config_block, 0);
 208 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
 209         ret = read_tdx_cfg_block_from_nand(config_block);
 210 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
 211         ret = read_tdx_cfg_block_from_nor(config_block);
 212 #else
 213         ret = -EINVAL;
 214 #endif
 215         if (ret)
 216                 goto out;
 217
 218         /* Expect a valid tag first */
 219         tag = (struct toradex_tag *)config_block;
 220         if (tag->flags != TAG_FLAG_VALID || tag->id != TAG_VALID) {
 221                 valid_cfgblock = false;
 222                 ret = -EINVAL;
 223                 goto out;
 224         }
 225         valid_cfgblock = true;
 226         offset = 4;
 227
 228         while (offset < TDX_CFG_BLOCK_MAX_SIZE) {
 229                 tag = (struct toradex_tag *)(config_block + offset);
 230                 offset += 4;
 231                 if (tag->id == TAG_INVALID)
 232                         break;
 233
 234                 if (tag->flags == TAG_FLAG_VALID) {
 235                         switch (tag->id) {
 236                         case TAG_MAC:
 237                                 memcpy(&tdx_eth_addr, config_block + offset,
 238                                        6);
 239
 240                                 /* NIC part of MAC address is serial number */
 241                                 tdx_serial = ntohl(tdx_eth_addr.nic) >> 8;
 242                                 break;
 243                         case TAG_HW:
 244                                 memcpy(&tdx_hw_tag, config_block + offset, 8);
 245                                 break;
 246                         }
 247                 }
 248
 249                 /* Get to next tag according to current tags length */
 250                 offset += tag->len * 4;
 251         }
 252
 253         /* Cap product id to avoid issues with a yet unknown one */
 254         if (tdx_hw_tag.prodid > (sizeof(toradex_modules) /
 255                                   sizeof(toradex_modules[0])))
 256                 tdx_hw_tag.prodid = 0;
 257
 258 out:
 259         free(config_block);
 260         return ret;
 261 }
 262
 263 static int get_cfgblock_interactive(void)
 264 {
 265         char message[CONFIG_SYS_CBSIZE];
 266         char *soc;
 267         char it = 'n';
 268         int len;
 269
 270         if (cpu_is_pxa27x())
 271                 sprintf(message, "Is the module the 312 MHz version? [y/N] ");
 272         else
 273                 sprintf(message, "Is the module an IT version? [y/N] ");
 274
 275         len = cli_readline(message);
 276         it = console_buffer[0];
 277
 278         soc = getenv("soc");
 279         if (!strcmp("mx6", soc)) {
 280 #ifdef CONFIG_MACH_TYPE
 281                 if (it == 'y' || it == 'Y')
 282                         if (is_cpu_type(MXC_CPU_MX6Q))
 283                                 tdx_hw_tag.prodid = APALIS_IMX6Q_IT;
 284                         else
 285                                 tdx_hw_tag.prodid = APALIS_IMX6D_IT;
 286                 else
 287                         if (is_cpu_type(MXC_CPU_MX6Q))
 288                                 tdx_hw_tag.prodid = APALIS_IMX6Q;
 289                         else
 290                                 tdx_hw_tag.prodid = APALIS_IMX6D;
 291 #else
 292                 if (it == 'y' || it == 'Y')
 293                         if (is_cpu_type(MXC_CPU_MX6DL))
 294                                 tdx_hw_tag.prodid = COLIBRI_IMX6DL_IT;
 295                         else
 296                                 tdx_hw_tag.prodid = COLIBRI_IMX6S_IT;
 297                 else
 298                         if (is_cpu_type(MXC_CPU_MX6DL))
 299                                 tdx_hw_tag.prodid = COLIBRI_IMX6DL;
 300                         else
 301                                 tdx_hw_tag.prodid = COLIBRI_IMX6S;
 302 #endif /* CONFIG_MACH_TYPE */
 303         } else if (!strcmp("imx7d", soc)) {
 304                 tdx_hw_tag.prodid = COLIBRI_IMX7D;
 305         } else if (!strcmp("imx7s", soc)) {
 306                 tdx_hw_tag.prodid = COLIBRI_IMX7S;
 307         } else if (!strcmp("tegra20", soc)) {
 308                 if (it == 'y' || it == 'Y')
 309                         if (gd->ram_size == 0x10000000)
 310                                 tdx_hw_tag.prodid = COLIBRI_T20_256MB_IT;
 311                         else
 312                                 tdx_hw_tag.prodid = COLIBRI_T20_512MB_IT;
 313                 else
 314                         if (gd->ram_size == 0x10000000)
 315                                 tdx_hw_tag.prodid = COLIBRI_T20_256MB;
 316                         else
 317                                 tdx_hw_tag.prodid = COLIBRI_T20_512MB;
 318         } else if (cpu_is_pxa27x()) {
 319                 if (it == 'y' || it == 'Y')
 320                         tdx_hw_tag.prodid = COLIBRI_PXA270_312MHZ;
 321                 else
 322                         tdx_hw_tag.prodid = COLIBRI_PXA270_520MHZ;
 323 #ifdef CONFIG_MACH_TYPE
 324         } else if (!strcmp("tegra30", soc)) {
 325                 if (CONFIG_MACH_TYPE == MACH_TYPE_APALIS_T30) {
 326                         if (it == 'y' || it == 'Y')
 327                                 tdx_hw_tag.prodid = APALIS_T30_IT;
 328                         else
 329                                 if (gd->ram_size == 0x40000000)
 330                                         tdx_hw_tag.prodid = APALIS_T30_1GB;
 331                                 else
 332                                         tdx_hw_tag.prodid = APALIS_T30_2GB;
 333                 } else {
 334                         if (it == 'y' || it == 'Y')
 335                                 tdx_hw_tag.prodid = COLIBRI_T30_IT;
 336                         else
 337                                 tdx_hw_tag.prodid = COLIBRI_T30;
 338                 }
 339 #endif /* CONFIG_MACH_TYPE */
 340         } else if (!strcmp("tegra124", soc)) {
 341                 tdx_hw_tag.prodid = APALIS_TK1_2GB;
 342         } else if (!strcmp("vf500", soc)) {
 343                 if (it == 'y' || it == 'Y')
 344                         tdx_hw_tag.prodid = COLIBRI_VF50_IT;
 345                 else
 346                         tdx_hw_tag.prodid = COLIBRI_VF50;
 347         } else if (!strcmp("vf610", soc)) {
 348                 if (it == 'y' || it == 'Y')
 349                         tdx_hw_tag.prodid = COLIBRI_VF61_IT;
 350                 else
 351                         tdx_hw_tag.prodid = COLIBRI_VF61;
 352         } else {
 353                 printf("Module type not detectable due to unknown SoC\n");
 354                 return -1;
 355         }
 356
 357         while (len < 4) {
 358                 sprintf(message, "Enter the module version (e.g. V1.1B): V");
 359                 len = cli_readline(message);
 360         }
 361
 362         tdx_hw_tag.ver_major = console_buffer[0] - '0';
 363         tdx_hw_tag.ver_minor = console_buffer[2] - '0';
 364         tdx_hw_tag.ver_assembly = console_buffer[3] - 'A';
 365
 366         if (cpu_is_pxa27x() && (tdx_hw_tag.ver_major == 1))
 367                 tdx_hw_tag.prodid -= (COLIBRI_PXA270_312MHZ -
 368                                        COLIBRI_PXA270_V1_312MHZ);
 369
 370         while (len < 8) {
 371                 sprintf(message, "Enter module serial number: ");
 372                 len = cli_readline(message);
 373         }
 374
 375         tdx_serial = simple_strtoul(console_buffer, NULL, 10);
 376
 377         return 0;
 378 }
 379
 380 static int get_cfgblock_barcode(char *barcode)
 381 {
 382         if (strlen(barcode) < 16) {
 383                 printf("Argument too short, barcode is 16 chars long\n");
 384                 return -1;
 385         }
 386
 387         /* Get hardware information from the first 8 digits */
 388         tdx_hw_tag.ver_major = barcode[4] - '0';
 389         tdx_hw_tag.ver_minor = barcode[5] - '0';
 390         tdx_hw_tag.ver_assembly = barcode[7] - '0';
 391
 392         barcode[4] = '\0';
 393         tdx_hw_tag.prodid = simple_strtoul(barcode, NULL, 10);
 394
 395         /* Parse second part of the barcode (serial number */
 396         barcode += 8;
 397         tdx_serial = simple_strtoul(barcode, NULL, 10);
 398
 399         return 0;
 400 }
 401
 402 static int do_cfgblock_create(cmd_tbl_t *cmdtp, int flag, int argc,
 403                               char * const argv[])
 404 {
 405         u8 *config_block;
 406         struct toradex_tag *tag;
 407         size_t size = TDX_CFG_BLOCK_MAX_SIZE;
 408         int offset = 0;
 409         int ret = CMD_RET_SUCCESS;
 410         int err;
 411
 412         /* Allocate RAM area for config block */
 413         config_block = memalign(ARCH_DMA_MINALIGN, size);
 414         if (!config_block) {
 415                 printf("Not enough malloc space available!\n");
 416                 return CMD_RET_FAILURE;
 417         }
 418
 419         memset(config_block, 0xff, size);
 420
 421         read_tdx_cfg_block();
 422         if (valid_cfgblock) {
 423 #if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
 424                 /*
 425                  * On NAND devices, recreation is only allowed if the page is
 426                  * empty (config block invalid...)
 427                  */
 428                 printf("NAND erase block %d need to be erased before creating a Toradex config block\n",
 429                        CONFIG_TDX_CFG_BLOCK_OFFSET / nand_info[0]->erasesize);
 430                 goto out;
 431 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
 432                 /*
 433                  * On NOR devices, recreation is only allowed if the sector is
 434                  * empty and write protection is off (config block invalid...)
 435                  */
 436                 printf("NOR sector at offset 0x%02x need to be erased and unprotected before creating a Toradex config block\n",
 437                        CONFIG_TDX_CFG_BLOCK_OFFSET);
 438                 goto out;
 439 #else
 440                 char message[CONFIG_SYS_CBSIZE];
 441                 sprintf(message,
 442                         "A valid Toradex config block is present, still recreate? [y/N] ");
 443
 444                 if (!cli_readline(message))
 445                         goto out;
 446
 447                 if (console_buffer[0] != 'y' && console_buffer[0] != 'Y')
 448                         goto out;
 449 #endif
 450         }
 451
 452         /* Parse new Toradex config block data... */
 453         if (argc < 3)
 454                 err = get_cfgblock_interactive();
 455         else
 456                 err = get_cfgblock_barcode(argv[2]);
 457
 458         if (err) {
 459                 ret = CMD_RET_FAILURE;
 460                 goto out;
 461         }
 462
 463         /* Convert serial number to MAC address (the storage format) */
 464         tdx_eth_addr.oui = htonl(0x00142dUL << 8);
 465         tdx_eth_addr.nic = htonl(tdx_serial << 8);
 466
 467         /* Valid Tag */
 468         tag = (struct toradex_tag *)config_block;
 469         tag->id = TAG_VALID;
 470         tag->flags = TAG_FLAG_VALID;
 471         tag->len = 0;
 472         offset += 4;
 473
 474         /* Product Tag */
 475         tag = (struct toradex_tag *)(config_block + offset);
 476         tag->id = TAG_HW;
 477         tag->flags = TAG_FLAG_VALID;
 478         tag->len = 2;
 479         offset += 4;
 480
 481         memcpy(config_block + offset, &tdx_hw_tag, 8);
 482         offset += 8;
 483
 484         /* MAC Tag */
 485         tag = (struct toradex_tag *)(config_block + offset);
 486         tag->id = TAG_MAC;
 487         tag->flags = TAG_FLAG_VALID;
 488         tag->len = 2;
 489         offset += 4;
 490
 491         memcpy(config_block + offset, &tdx_eth_addr, 6);
 492         offset += 6;
 493         memset(config_block + offset, 0, 32 - offset);
 494
 495 #if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
 496         err = tdx_cfg_block_mmc_storage(config_block, 1);
 497 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
 498         err = write_tdx_cfg_block_to_nand(config_block);
 499 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
 500         err = write_tdx_cfg_block_to_nor(config_block);
 501 #else
 502         err = -EINVAL;
 503 #endif
 504         if (err) {
 505                 printf("Failed to write Toradex config block: %d\n", ret);
 506                 ret = CMD_RET_FAILURE;
 507                 goto out;
 508         }
 509
 510         printf("Toradex config block successfully written\n");
 511
 512 out:
 513         free(config_block);
 514         return ret;
 515 }
 516
 517 static int do_cfgblock(cmd_tbl_t *cmdtp, int flag, int argc,
 518                        char * const argv[])
 519 {
 520         int ret;
 521
 522         if (argc < 2)
 523                 return CMD_RET_USAGE;
 524
 525         if (!strcmp(argv[1], "create")) {
 526                 return do_cfgblock_create(cmdtp, flag, argc, argv);
 527         } else if (!strcmp(argv[1], "reload")) {
 528                 ret = read_tdx_cfg_block();
 529                 if (ret) {
 530                         printf("Failed to reload Toradex config block: %d\n",
 531                                ret);
 532                         return CMD_RET_FAILURE;
 533                 }
 534                 return CMD_RET_SUCCESS;
 535         }
 536
 537         return CMD_RET_USAGE;
 538 }
 539
 540 U_BOOT_CMD(
 541         cfgblock, 3, 0, do_cfgblock,
 542         "Toradex config block handling commands",
 543         "create [barcode] - (Re-)create Toradex config block\n"
 544         "cfgblock reload - Reload Toradex config block from flash"
 545 );