tools/atmelimage.c

   1 /*
   2  * (C) Copyright 2014
   3  * Andreas Bießmann <andreas.devel@googlemail.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include "imagetool.h"
   9 #include "mkimage.h"
  10
  11 #include <image.h>
  12
  13 #define pr_err(fmt, args...) fprintf(stderr, "atmelimage Error: " fmt, ##args)
  14
  15 static int atmel_check_image_type(uint8_t type)
  16 {
  17         if (type == IH_TYPE_ATMELIMAGE)
  18                 return EXIT_SUCCESS;
  19         else
  20                 return EXIT_FAILURE;
  21 }
  22
  23 static uint32_t nand_pmecc_header[52];
  24
  25 /*
  26  * A helper struct for parsing the mkimage -n parameter
  27  *
  28  * Keep in same order as the configs array!
  29  */
  30 static struct pmecc_config {
  31         int use_pmecc;
  32         int sector_per_page;
  33         int spare_size;
  34         int ecc_bits;
  35         int sector_size;
  36         int ecc_offset;
  37 } pmecc;
  38
  39 /*
  40  * Strings used for configure the PMECC header via -n mkimage switch
  41  *
  42  * We estimate a coma separated list of key=value pairs. The mkimage -n
  43  * parameter argument should not contain any whitespace.
  44  *
  45  * Keep in same order as struct pmecc_config!
  46  */
  47 static const char * const configs[] = {
  48         "usePmecc",
  49         "sectorPerPage",
  50         "spareSize",
  51         "eccBits",
  52         "sectorSize",
  53         "eccOffset"
  54 };
  55
  56 static int atmel_find_pmecc_parameter_in_token(const char *token)
  57 {
  58         size_t pos;
  59         char *param;
  60
  61         debug("token: '%s'\n", token);
  62
  63         for (pos = 0; pos < ARRAY_SIZE(configs); pos++) {
  64                 if (strncmp(token, configs[pos], strlen(configs[pos])) == 0) {
  65                         param = strstr(token, "=");
  66                         if (!param)
  67                                 goto err;
  68
  69                         param++;
  70                         debug("\t%s parameter: '%s'\n", configs[pos], param);
  71
  72                         switch (pos) {
  73                         case 0:
  74                                 pmecc.use_pmecc = strtol(param, NULL, 10);
  75                                 return EXIT_SUCCESS;
  76                         case 1:
  77                                 pmecc.sector_per_page = strtol(param, NULL, 10);
  78                                 return EXIT_SUCCESS;
  79                         case 2:
  80                                 pmecc.spare_size = strtol(param, NULL, 10);
  81                                 return EXIT_SUCCESS;
  82                         case 3:
  83                                 pmecc.ecc_bits = strtol(param, NULL, 10);
  84                                 return EXIT_SUCCESS;
  85                         case 4:
  86                                 pmecc.sector_size = strtol(param, NULL, 10);
  87                                 return EXIT_SUCCESS;
  88                         case 5:
  89                                 pmecc.ecc_offset = strtol(param, NULL, 10);
  90                                 return EXIT_SUCCESS;
  91                         }
  92                 }
  93         }
  94
  95 err:
  96         pr_err("Could not find parameter in token '%s'\n", token);
  97         return EXIT_FAILURE;
  98 }
  99
 100 static int atmel_parse_pmecc_params(char *txt)
 101 {
 102         char *token;
 103
 104         token = strtok(txt, ",");
 105         while (token != NULL) {
 106                 if (atmel_find_pmecc_parameter_in_token(token))
 107                         return EXIT_FAILURE;
 108
 109                 token = strtok(NULL, ",");
 110         }
 111
 112         return EXIT_SUCCESS;
 113 }
 114
 115 static int atmel_verify_header(unsigned char *ptr, int image_size,
 116                         struct image_tool_params *params)
 117 {
 118         uint32_t *ints = (uint32_t *)ptr;
 119         size_t pos;
 120         size_t size = image_size;
 121
 122         /* check if we have an PMECC header attached */
 123         for (pos = 0; pos < ARRAY_SIZE(nand_pmecc_header); pos++)
 124                 if (ints[pos] >> 28 != 0xC)
 125                         break;
 126
 127         if (pos == ARRAY_SIZE(nand_pmecc_header)) {
 128                 ints += ARRAY_SIZE(nand_pmecc_header);
 129                 size -= sizeof(nand_pmecc_header);
 130         }
 131
 132         /* check the seven interrupt vectors of binary */
 133         for (pos = 0; pos < 7; pos++) {
 134                 debug("atmelimage: interrupt vector #%d is 0x%08X\n", pos+1,
 135                       ints[pos]);
 136                 /*
 137                  * all vectors except the 6'th one must contain valid
 138                  * LDR or B Opcode
 139                  */
 140                 if (pos == 5)
 141                         /* 6'th vector has image size set, check later */
 142                         continue;
 143                 if ((ints[pos] & 0xff000000) == 0xea000000)
 144                         /* valid B Opcode */
 145                         continue;
 146                 if ((ints[pos] & 0xfffff000) == 0xe59ff000)
 147                         /* valid LDR (I=0, P=1, U=1, B=0, W=0, L=1) */
 148                         continue;
 149                 /* ouch, one of the checks has missed ... */
 150                 return 1;
 151         }
 152
 153         return ints[5] != cpu_to_le32(size);
 154 }
 155
 156 static void atmel_print_pmecc_header(const uint32_t word)
 157 {
 158         int val;
 159
 160         printf("\t\tPMECC header\n");
 161
 162         printf("\t\t====================\n");
 163
 164         val = (word >> 18) & 0x1ff;
 165         printf("\t\teccOffset: %9i\n", val);
 166
 167         val = (((word >> 16) & 0x3) == 0) ? 512 : 1024;
 168         printf("\t\tsectorSize: %8i\n", val);
 169
 170         if (((word >> 13) & 0x7) <= 2)
 171                 val = (2 << ((word >> 13) & 0x7));
 172         else
 173                 val = (12 << (((word >> 13) & 0x7) - 3));
 174         printf("\t\teccBitReq: %9i\n", val);
 175
 176         val = (word >> 4) & 0x1ff;
 177         printf("\t\tspareSize: %9i\n", val);
 178
 179         val = (1 << ((word >> 1) & 0x3));
 180         printf("\t\tnbSectorPerPage: %3i\n", val);
 181
 182         printf("\t\tusePmecc: %10i\n", word & 0x1);
 183         printf("\t\t====================\n");
 184 }
 185
 186 static void atmel_print_header(const void *ptr)
 187 {
 188         uint32_t *ints = (uint32_t *)ptr;
 189         size_t pos;
 190
 191         /* check if we have an PMECC header attached */
 192         for (pos = 0; pos < ARRAY_SIZE(nand_pmecc_header); pos++)
 193                 if (ints[pos] >> 28 != 0xC)
 194                         break;
 195
 196         if (pos == ARRAY_SIZE(nand_pmecc_header)) {
 197                 printf("Image Type:\tATMEL ROM-Boot Image with PMECC Header\n");
 198                 atmel_print_pmecc_header(ints[0]);
 199                 pos += 5;
 200         } else {
 201                 printf("Image Type:\tATMEL ROM-Boot Image without PMECC Header\n");
 202                 pos = 5;
 203         }
 204         printf("\t\t6'th vector has %u set\n", le32_to_cpu(ints[pos]));
 205 }
 206
 207 static void atmel_set_header(void *ptr, struct stat *sbuf, int ifd,
 208                                 struct image_tool_params *params)
 209 {
 210         /* just save the image size into 6'th interrupt vector */
 211         uint32_t *ints = (uint32_t *)ptr;
 212         size_t cnt;
 213         size_t pos = 5;
 214         size_t size = sbuf->st_size;
 215
 216         for (cnt = 0; cnt < ARRAY_SIZE(nand_pmecc_header); cnt++)
 217                 if (ints[cnt] >> 28 != 0xC)
 218                         break;
 219
 220         if (cnt == ARRAY_SIZE(nand_pmecc_header)) {
 221                 pos += ARRAY_SIZE(nand_pmecc_header);
 222                 size -= sizeof(nand_pmecc_header);
 223         }
 224
 225         ints[pos] = cpu_to_le32(size);
 226 }
 227
 228 static int atmel_check_params(struct image_tool_params *params)
 229 {
 230         if (strlen(params->imagename) > 0)
 231                 if (atmel_parse_pmecc_params(params->imagename))
 232                         return EXIT_FAILURE;
 233
 234         return !(!params->eflag &&
 235                 !params->fflag &&
 236                 !params->xflag &&
 237                 ((params->dflag && !params->lflag) ||
 238                  (params->lflag && !params->dflag)));
 239 }
 240
 241 static int atmel_vrec_header(struct image_tool_params *params,
 242                                 struct image_type_params *tparams)
 243 {
 244         uint32_t tmp;
 245         size_t pos;
 246
 247         if (strlen(params->imagename) == 0)
 248                 return EXIT_SUCCESS;
 249
 250         tmp = 0xC << 28;
 251
 252         tmp |= (pmecc.ecc_offset & 0x1ff) << 18;
 253
 254         switch (pmecc.sector_size) {
 255         case 512:
 256                 tmp |= 0 << 16;
 257                 break;
 258         case 1024:
 259                 tmp |= 1 << 16;
 260                 break;
 261
 262         default:
 263                 pr_err("Wrong sectorSize (%i) for PMECC header\n",
 264                        pmecc.sector_size);
 265                 return EXIT_FAILURE;
 266         }
 267
 268         switch (pmecc.ecc_bits) {
 269         case 2:
 270                 tmp |= 0 << 13;
 271                 break;
 272         case 4:
 273                 tmp |= 1 << 13;
 274                 break;
 275         case 8:
 276                 tmp |= 2 << 13;
 277                 break;
 278         case 12:
 279                 tmp |= 3 << 13;
 280                 break;
 281         case 24:
 282                 tmp |= 4 << 13;
 283                 break;
 284
 285         default:
 286                 pr_err("Wrong eccBits (%i) for PMECC header\n",
 287                        pmecc.ecc_bits);
 288                  return EXIT_FAILURE;
 289         }
 290
 291         tmp |= (pmecc.spare_size & 0x1ff) << 4;
 292
 293         switch (pmecc.sector_per_page) {
 294         case 1:
 295                 tmp |= 0 << 1;
 296                 break;
 297         case 2:
 298                 tmp |= 1 << 1;
 299                 break;
 300         case 4:
 301                 tmp |= 2 << 1;
 302                 break;
 303         case 8:
 304                 tmp |= 3 << 1;
 305                 break;
 306
 307         default:
 308                 pr_err("Wrong sectorPerPage (%i) for PMECC header\n",
 309                        pmecc.sector_per_page);
 310                 return EXIT_FAILURE;
 311         }
 312
 313         if (pmecc.use_pmecc)
 314                 tmp |= 1;
 315
 316         for (pos = 0; pos < ARRAY_SIZE(nand_pmecc_header); pos++)
 317                 nand_pmecc_header[pos] = tmp;
 318
 319         debug("PMECC header filled 52 times with 0x%08X\n", tmp);
 320
 321         tparams->header_size = sizeof(nand_pmecc_header);
 322         tparams->hdr = nand_pmecc_header;
 323
 324         return EXIT_SUCCESS;
 325 }
 326
 327 static struct image_type_params atmelimage_params = {
 328         .name           = "ATMEL ROM-Boot Image support",
 329         .header_size    = 0,
 330         .hdr            = NULL,
 331         .check_image_type = atmel_check_image_type,
 332         .verify_header  = atmel_verify_header,
 333         .print_header   = atmel_print_header,
 334         .set_header     = atmel_set_header,
 335         .check_params   = atmel_check_params,
 336         .vrec_header    = atmel_vrec_header,
 337 };
 338
 339 void init_atmel_image_type(void)
 340 {
 341         register_image_type(&atmelimage_params);
 342 }