tools/atmelimage.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2014
   4  * Andreas Bießmann <andreas@biessmann.org>
   5  */
   6
   7 #include "imagetool.h"
   8 #include "mkimage.h"
   9
  10 #include <image.h>
  11
  12 #define pr_err(fmt, args...) fprintf(stderr, "atmelimage Error: " fmt, ##args)
  13
  14 static int atmel_check_image_type(uint8_t type)
  15 {
  16         if (type == IH_TYPE_ATMELIMAGE)
  17                 return EXIT_SUCCESS;
  18         else
  19                 return EXIT_FAILURE;
  20 }
  21
  22 static uint32_t nand_pmecc_header[52];
  23
  24 /*
  25  * A helper struct for parsing the mkimage -n parameter
  26  *
  27  * Keep in same order as the configs array!
  28  */
  29 static struct pmecc_config {
  30         int use_pmecc;
  31         int sector_per_page;
  32         int spare_size;
  33         int ecc_bits;
  34         int sector_size;
  35         int ecc_offset;
  36 } pmecc;
  37
  38 /*
  39  * Strings used for configure the PMECC header via -n mkimage switch
  40  *
  41  * We estimate a coma separated list of key=value pairs. The mkimage -n
  42  * parameter argument should not contain any whitespace.
  43  *
  44  * Keep in same order as struct pmecc_config!
  45  */
  46 static const char * const configs[] = {
  47         "usePmecc",
  48         "sectorPerPage",
  49         "spareSize",
  50         "eccBits",
  51         "sectorSize",
  52         "eccOffset"
  53 };
  54
  55 static int atmel_find_pmecc_parameter_in_token(const char *token)
  56 {
  57         size_t pos;
  58         char *param;
  59
  60         debug("token: '%s'\n", token);
  61
  62         for (pos = 0; pos < ARRAY_SIZE(configs); pos++) {
  63                 if (strncmp(token, configs[pos], strlen(configs[pos])) == 0) {
  64                         param = strstr(token, "=");
  65                         if (!param)
  66                                 goto err;
  67
  68                         param++;
  69                         debug("\t%s parameter: '%s'\n", configs[pos], param);
  70
  71                         switch (pos) {
  72                         case 0:
  73                                 pmecc.use_pmecc = strtol(param, NULL, 10);
  74                                 return EXIT_SUCCESS;
  75                         case 1:
  76                                 pmecc.sector_per_page = strtol(param, NULL, 10);
  77                                 return EXIT_SUCCESS;
  78                         case 2:
  79                                 pmecc.spare_size = strtol(param, NULL, 10);
  80                                 return EXIT_SUCCESS;
  81                         case 3:
  82                                 pmecc.ecc_bits = strtol(param, NULL, 10);
  83                                 return EXIT_SUCCESS;
  84                         case 4:
  85                                 pmecc.sector_size = strtol(param, NULL, 10);
  86                                 return EXIT_SUCCESS;
  87                         case 5:
  88                                 pmecc.ecc_offset = strtol(param, NULL, 10);
  89                                 return EXIT_SUCCESS;
  90                         }
  91                 }
  92         }
  93
  94 err:
  95         pr_err("Could not find parameter in token '%s'\n", token);
  96         return EXIT_FAILURE;
  97 }
  98
  99 static int atmel_parse_pmecc_params(char *txt)
 100 {
 101         char *token;
 102
 103         token = strtok(txt, ",");
 104         while (token != NULL) {
 105                 if (atmel_find_pmecc_parameter_in_token(token))
 106                         return EXIT_FAILURE;
 107
 108                 token = strtok(NULL, ",");
 109         }
 110
 111         return EXIT_SUCCESS;
 112 }
 113
 114 static int atmel_verify_header(unsigned char *ptr, int image_size,
 115                         struct image_tool_params *params)
 116 {
 117         uint32_t *ints = (uint32_t *)ptr;
 118         size_t pos;
 119         size_t size = image_size;
 120
 121         /* check if we have an PMECC header attached */
 122         for (pos = 0; pos < ARRAY_SIZE(nand_pmecc_header); pos++)
 123                 if (ints[pos] >> 28 != 0xC)
 124                         break;
 125
 126         if (pos == ARRAY_SIZE(nand_pmecc_header)) {
 127                 ints += ARRAY_SIZE(nand_pmecc_header);
 128                 size -= sizeof(nand_pmecc_header);
 129         }
 130
 131         /* check the seven interrupt vectors of binary */
 132         for (pos = 0; pos < 7; pos++) {
 133                 debug("atmelimage: interrupt vector #%zu is 0x%08X\n", pos+1,
 134                       ints[pos]);
 135                 /*
 136                  * all vectors except the 6'th one must contain valid
 137                  * LDR or B Opcode
 138                  */
 139                 if (pos == 5)
 140                         /* 6'th vector has image size set, check later */
 141                         continue;
 142                 if ((ints[pos] & 0xff000000) == 0xea000000)
 143                         /* valid B Opcode */
 144                         continue;
 145                 if ((ints[pos] & 0xfffff000) == 0xe59ff000)
 146                         /* valid LDR (I=0, P=1, U=1, B=0, W=0, L=1) */
 147                         continue;
 148                 /* ouch, one of the checks has missed ... */
 149                 return 1;
 150         }
 151
 152         return ints[5] != cpu_to_le32(size);
 153 }
 154
 155 static void atmel_print_pmecc_header(const uint32_t word)
 156 {
 157         int val;
 158
 159         printf("\t\tPMECC header\n");
 160
 161         printf("\t\t====================\n");
 162
 163         val = (word >> 18) & 0x1ff;
 164         printf("\t\teccOffset: %9i\n", val);
 165
 166         val = (((word >> 16) & 0x3) == 0) ? 512 : 1024;
 167         printf("\t\tsectorSize: %8i\n", val);
 168
 169         if (((word >> 13) & 0x7) <= 2)
 170                 val = (2 << ((word >> 13) & 0x7));
 171         else
 172                 val = (12 << (((word >> 13) & 0x7) - 3));
 173         printf("\t\teccBitReq: %9i\n", val);
 174
 175         val = (word >> 4) & 0x1ff;
 176         printf("\t\tspareSize: %9i\n", val);
 177
 178         val = (1 << ((word >> 1) & 0x3));
 179         printf("\t\tnbSectorPerPage: %3i\n", val);
 180
 181         printf("\t\tusePmecc: %10i\n", word & 0x1);
 182         printf("\t\t====================\n");
 183 }
 184
 185 static void atmel_print_header(const void *ptr)
 186 {
 187         uint32_t *ints = (uint32_t *)ptr;
 188         size_t pos;
 189
 190         /* check if we have an PMECC header attached */
 191         for (pos = 0; pos < ARRAY_SIZE(nand_pmecc_header); pos++)
 192                 if (ints[pos] >> 28 != 0xC)
 193                         break;
 194
 195         if (pos == ARRAY_SIZE(nand_pmecc_header)) {
 196                 printf("Image Type:\tATMEL ROM-Boot Image with PMECC Header\n");
 197                 atmel_print_pmecc_header(ints[0]);
 198                 pos += 5;
 199         } else {
 200                 printf("Image Type:\tATMEL ROM-Boot Image without PMECC Header\n");
 201                 pos = 5;
 202         }
 203         printf("\t\t6'th vector has %u set\n", le32_to_cpu(ints[pos]));
 204 }
 205
 206 static void atmel_set_header(void *ptr, struct stat *sbuf, int ifd,
 207                                 struct image_tool_params *params)
 208 {
 209         /* just save the image size into 6'th interrupt vector */
 210         uint32_t *ints = (uint32_t *)ptr;
 211         size_t cnt;
 212         size_t pos = 5;
 213         size_t size = sbuf->st_size;
 214
 215         for (cnt = 0; cnt < ARRAY_SIZE(nand_pmecc_header); cnt++)
 216                 if (ints[cnt] >> 28 != 0xC)
 217                         break;
 218
 219         if (cnt == ARRAY_SIZE(nand_pmecc_header)) {
 220                 pos += ARRAY_SIZE(nand_pmecc_header);
 221                 size -= sizeof(nand_pmecc_header);
 222         }
 223
 224         ints[pos] = cpu_to_le32(size);
 225 }
 226
 227 static int atmel_check_params(struct image_tool_params *params)
 228 {
 229         if (strlen(params->imagename) > 0)
 230                 if (atmel_parse_pmecc_params(params->imagename))
 231                         return EXIT_FAILURE;
 232
 233         return !(!params->eflag &&
 234                 !params->fflag &&
 235                 !params->xflag &&
 236                 ((params->dflag && !params->lflag) ||
 237                  (params->lflag && !params->dflag)));
 238 }
 239
 240 static int atmel_vrec_header(struct image_tool_params *params,
 241                                 struct image_type_params *tparams)
 242 {
 243         uint32_t tmp;
 244         size_t pos;
 245
 246         if (strlen(params->imagename) == 0)
 247                 return EXIT_SUCCESS;
 248
 249         tmp = 0xC << 28;
 250
 251         tmp |= (pmecc.ecc_offset & 0x1ff) << 18;
 252
 253         switch (pmecc.sector_size) {
 254         case 512:
 255                 tmp |= 0 << 16;
 256                 break;
 257         case 1024:
 258                 tmp |= 1 << 16;
 259                 break;
 260
 261         default:
 262                 pr_err("Wrong sectorSize (%i) for PMECC header\n",
 263                        pmecc.sector_size);
 264                 return EXIT_FAILURE;
 265         }
 266
 267         switch (pmecc.ecc_bits) {
 268         case 2:
 269                 tmp |= 0 << 13;
 270                 break;
 271         case 4:
 272                 tmp |= 1 << 13;
 273                 break;
 274         case 8:
 275                 tmp |= 2 << 13;
 276                 break;
 277         case 12:
 278                 tmp |= 3 << 13;
 279                 break;
 280         case 24:
 281                 tmp |= 4 << 13;
 282                 break;
 283
 284         default:
 285                 pr_err("Wrong eccBits (%i) for PMECC header\n",
 286                        pmecc.ecc_bits);
 287                  return EXIT_FAILURE;
 288         }
 289
 290         tmp |= (pmecc.spare_size & 0x1ff) << 4;
 291
 292         switch (pmecc.sector_per_page) {
 293         case 1:
 294                 tmp |= 0 << 1;
 295                 break;
 296         case 2:
 297                 tmp |= 1 << 1;
 298                 break;
 299         case 4:
 300                 tmp |= 2 << 1;
 301                 break;
 302         case 8:
 303                 tmp |= 3 << 1;
 304                 break;
 305
 306         default:
 307                 pr_err("Wrong sectorPerPage (%i) for PMECC header\n",
 308                        pmecc.sector_per_page);
 309                 return EXIT_FAILURE;
 310         }
 311
 312         if (pmecc.use_pmecc)
 313                 tmp |= 1;
 314
 315         for (pos = 0; pos < ARRAY_SIZE(nand_pmecc_header); pos++)
 316                 nand_pmecc_header[pos] = tmp;
 317
 318         debug("PMECC header filled 52 times with 0x%08X\n", tmp);
 319
 320         tparams->header_size = sizeof(nand_pmecc_header);
 321         tparams->hdr = nand_pmecc_header;
 322
 323         return EXIT_SUCCESS;
 324 }
 325
 326 U_BOOT_IMAGE_TYPE(
 327         atmelimage,
 328         "ATMEL ROM-Boot Image support",
 329         0,
 330         NULL,
 331         atmel_check_params,
 332         atmel_verify_header,
 333         atmel_print_header,
 334         atmel_set_header,
 335         NULL,
 336         atmel_check_image_type,
 337         NULL,
 338         atmel_vrec_header
 339 );