common/update.c

   1 /*
   2  * (C) Copyright 2008 Semihalf
   3  *
   4  * Written by: Rafal Czubak <rcz@semihalf.com>
   5  *             Bartlomiej Sieka <tur@semihalf.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11
  12 #if !(defined(CONFIG_FIT) && defined(CONFIG_OF_LIBFDT))
  13 #error "CONFIG_FIT and CONFIG_OF_LIBFDT are required for auto-update feature"
  14 #endif
  15
  16 #if defined(CONFIG_UPDATE_TFTP) && !defined(CONFIG_MTD_NOR_FLASH)
  17 #error "CONFIG_UPDATE_TFTP and !CONFIG_MTD_NOR_FLASH needed for legacy behaviour"
  18 #endif
  19
  20 #include <command.h>
  21 #include <flash.h>
  22 #include <net.h>
  23 #include <net/tftp.h>
  24 #include <malloc.h>
  25 #include <dfu.h>
  26 #include <errno.h>
  27
  28 /* env variable holding the location of the update file */
  29 #define UPDATE_FILE_ENV         "updatefile"
  30
  31 /* set configuration defaults if needed */
  32 #ifndef CONFIG_UPDATE_LOAD_ADDR
  33 #define CONFIG_UPDATE_LOAD_ADDR 0x100000
  34 #endif
  35
  36 #ifndef CONFIG_UPDATE_TFTP_MSEC_MAX
  37 #define CONFIG_UPDATE_TFTP_MSEC_MAX     100
  38 #endif
  39
  40 #ifndef CONFIG_UPDATE_TFTP_CNT_MAX
  41 #define CONFIG_UPDATE_TFTP_CNT_MAX      0
  42 #endif
  43
  44 extern ulong tftp_timeout_ms;
  45 extern int tftp_timeout_count_max;
  46 extern ulong load_addr;
  47 #ifdef CONFIG_MTD_NOR_FLASH
  48 extern flash_info_t flash_info[];
  49 static uchar *saved_prot_info;
  50 #endif
  51 static int update_load(char *filename, ulong msec_max, int cnt_max, ulong addr)
  52 {
  53         int size, rv;
  54         ulong saved_timeout_msecs;
  55         int saved_timeout_count;
  56         char *saved_netretry, *saved_bootfile;
  57
  58         rv = 0;
  59         /* save used globals and env variable */
  60         saved_timeout_msecs = tftp_timeout_ms;
  61         saved_timeout_count = tftp_timeout_count_max;
  62         saved_netretry = strdup(env_get("netretry"));
  63         saved_bootfile = strdup(net_boot_file_name);
  64
  65         /* set timeouts for auto-update */
  66         tftp_timeout_ms = msec_max;
  67         tftp_timeout_count_max = cnt_max;
  68
  69         /* we don't want to retry the connection if errors occur */
  70         env_set("netretry", "no");
  71
  72         /* download the update file */
  73         load_addr = addr;
  74         copy_filename(net_boot_file_name, filename, sizeof(net_boot_file_name));
  75         size = net_loop(TFTPGET);
  76
  77         if (size < 0)
  78                 rv = 1;
  79         else if (size > 0)
  80                 flush_cache(addr, size);
  81
  82         /* restore changed globals and env variable */
  83         tftp_timeout_ms = saved_timeout_msecs;
  84         tftp_timeout_count_max = saved_timeout_count;
  85
  86         env_set("netretry", saved_netretry);
  87         if (saved_netretry != NULL)
  88                 free(saved_netretry);
  89
  90         if (saved_bootfile != NULL) {
  91                 copy_filename(net_boot_file_name, saved_bootfile,
  92                               sizeof(net_boot_file_name));
  93                 free(saved_bootfile);
  94         }
  95
  96         return rv;
  97 }
  98
  99 #ifdef CONFIG_MTD_NOR_FLASH
 100 static int update_flash_protect(int prot, ulong addr_first, ulong addr_last)
 101 {
 102         uchar *sp_info_ptr;
 103         ulong s;
 104         int i, bank, cnt;
 105         flash_info_t *info;
 106
 107         sp_info_ptr = NULL;
 108
 109         if (prot == 0) {
 110                 saved_prot_info =
 111                         calloc(CONFIG_SYS_MAX_FLASH_BANKS * CONFIG_SYS_MAX_FLASH_SECT, 1);
 112                 if (!saved_prot_info)
 113                         return 1;
 114         }
 115
 116         for (bank = 0; bank < CONFIG_SYS_MAX_FLASH_BANKS; ++bank) {
 117                 cnt = 0;
 118                 info = &flash_info[bank];
 119
 120                 /* Nothing to do if the bank doesn't exist */
 121                 if (info->sector_count == 0)
 122                         return 0;
 123
 124                 /* Point to current bank protection information */
 125                 sp_info_ptr = saved_prot_info + (bank * CONFIG_SYS_MAX_FLASH_SECT);
 126
 127                 /*
 128                  * Adjust addr_first or addr_last if we are on bank boundary.
 129                  * Address space between banks must be continuous for other
 130                  * flash functions (like flash_sect_erase or flash_write) to
 131                  * succeed. Banks must also be numbered in correct order,
 132                  * according to increasing addresses.
 133                  */
 134                 if (addr_last > info->start[0] + info->size - 1)
 135                         addr_last = info->start[0] + info->size - 1;
 136                 if (addr_first < info->start[0])
 137                         addr_first = info->start[0];
 138
 139                 for (i = 0; i < info->sector_count; i++) {
 140                         /* Save current information about protected sectors */
 141                         if (prot == 0) {
 142                                 s = info->start[i];
 143                                 if ((s >= addr_first) && (s <= addr_last))
 144                                         sp_info_ptr[i] = info->protect[i];
 145
 146                         }
 147
 148                         /* Protect/unprotect sectors */
 149                         if (sp_info_ptr[i] == 1) {
 150 #if defined(CONFIG_SYS_FLASH_PROTECTION)
 151                                 if (flash_real_protect(info, i, prot))
 152                                         return 1;
 153 #else
 154                                 info->protect[i] = prot;
 155 #endif
 156                                 cnt++;
 157                         }
 158                 }
 159
 160                 if (cnt) {
 161                         printf("%sProtected %d sectors\n",
 162                                                 prot ? "": "Un-", cnt);
 163                 }
 164         }
 165
 166         if((prot == 1) && saved_prot_info)
 167                 free(saved_prot_info);
 168
 169         return 0;
 170 }
 171 #endif
 172
 173 static int update_flash(ulong addr_source, ulong addr_first, ulong size)
 174 {
 175 #ifdef CONFIG_MTD_NOR_FLASH
 176         ulong addr_last = addr_first + size - 1;
 177
 178         /* round last address to the sector boundary */
 179         if (flash_sect_roundb(&addr_last) > 0)
 180                 return 1;
 181
 182         if (addr_first >= addr_last) {
 183                 printf("Error: end address exceeds addressing space\n");
 184                 return 1;
 185         }
 186
 187         /* remove protection on processed sectors */
 188         if (update_flash_protect(0, addr_first, addr_last) > 0) {
 189                 printf("Error: could not unprotect flash sectors\n");
 190                 return 1;
 191         }
 192
 193         printf("Erasing 0x%08lx - 0x%08lx", addr_first, addr_last);
 194         if (flash_sect_erase(addr_first, addr_last) > 0) {
 195                 printf("Error: could not erase flash\n");
 196                 return 1;
 197         }
 198
 199         printf("Copying to flash...");
 200         if (flash_write((char *)addr_source, addr_first, size) > 0) {
 201                 printf("Error: could not copy to flash\n");
 202                 return 1;
 203         }
 204         printf("done\n");
 205
 206         /* enable protection on processed sectors */
 207         if (update_flash_protect(1, addr_first, addr_last) > 0) {
 208                 printf("Error: could not protect flash sectors\n");
 209                 return 1;
 210         }
 211 #endif
 212         return 0;
 213 }
 214
 215 static int update_fit_getparams(const void *fit, int noffset, ulong *addr,
 216                                                 ulong *fladdr, ulong *size)
 217 {
 218         const void *data;
 219
 220         if (fit_image_get_data(fit, noffset, &data, (size_t *)size))
 221                 return 1;
 222
 223         if (fit_image_get_load(fit, noffset, (ulong *)fladdr))
 224                 return 1;
 225
 226         *addr = (ulong)data;
 227
 228         return 0;
 229 }
 230
 231 int update_tftp(ulong addr, char *interface, char *devstring)
 232 {
 233         char *filename, *env_addr, *fit_image_name;
 234         ulong update_addr, update_fladdr, update_size;
 235         int images_noffset, ndepth, noffset;
 236         bool update_tftp_dfu;
 237         int ret = 0;
 238         void *fit;
 239
 240         if (interface == NULL && devstring == NULL) {
 241                 update_tftp_dfu = false;
 242         } else if (interface && devstring) {
 243                 update_tftp_dfu = true;
 244         } else {
 245                 pr_err("Interface: %s and devstring: %s not supported!\n",
 246                       interface, devstring);
 247                 return -EINVAL;
 248         }
 249
 250         /* use already present image */
 251         if (addr)
 252                 goto got_update_file;
 253
 254         printf("Auto-update from TFTP: ");
 255
 256         /* get the file name of the update file */
 257         filename = env_get(UPDATE_FILE_ENV);
 258         if (filename == NULL) {
 259                 printf("failed, env. variable '%s' not found\n",
 260                                                         UPDATE_FILE_ENV);
 261                 return 1;
 262         }
 263
 264         printf("trying update file '%s'\n", filename);
 265
 266         /* get load address of downloaded update file */
 267         env_addr = env_get("loadaddr");
 268         if (env_addr)
 269                 addr = simple_strtoul(env_addr, NULL, 16);
 270         else
 271                 addr = CONFIG_UPDATE_LOAD_ADDR;
 272
 273
 274         if (update_load(filename, CONFIG_UPDATE_TFTP_MSEC_MAX,
 275                                         CONFIG_UPDATE_TFTP_CNT_MAX, addr)) {
 276                 printf("Can't load update file, aborting auto-update\n");
 277                 return 1;
 278         }
 279
 280 got_update_file:
 281         fit = (void *)addr;
 282
 283         if (!fit_check_format((void *)fit)) {
 284                 printf("Bad FIT format of the update file, aborting "
 285                                                         "auto-update\n");
 286                 return 1;
 287         }
 288
 289         /* process updates */
 290         images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
 291
 292         ndepth = 0;
 293         noffset = fdt_next_node(fit, images_noffset, &ndepth);
 294         while (noffset >= 0 && ndepth > 0) {
 295                 if (ndepth != 1)
 296                         goto next_node;
 297
 298                 fit_image_name = (char *)fit_get_name(fit, noffset, NULL);
 299                 printf("Processing update '%s' :", fit_image_name);
 300
 301                 if (!fit_image_verify(fit, noffset)) {
 302                         printf("Error: invalid update hash, aborting\n");
 303                         ret = 1;
 304                         goto next_node;
 305                 }
 306
 307                 printf("\n");
 308                 if (update_fit_getparams(fit, noffset, &update_addr,
 309                                         &update_fladdr, &update_size)) {
 310                         printf("Error: can't get update parameteres, "
 311                                                                 "aborting\n");
 312                         ret = 1;
 313                         goto next_node;
 314                 }
 315
 316                 if (!update_tftp_dfu) {
 317                         if (update_flash(update_addr, update_fladdr,
 318                                          update_size)) {
 319                                 printf("Error: can't flash update, aborting\n");
 320                                 ret = 1;
 321                                 goto next_node;
 322                         }
 323                 } else if (fit_image_check_type(fit, noffset,
 324                                                 IH_TYPE_FIRMWARE)) {
 325                         ret = dfu_tftp_write(fit_image_name, update_addr,
 326                                              update_size, interface, devstring);
 327                         if (ret)
 328                                 return ret;
 329                 }
 330 next_node:
 331                 noffset = fdt_next_node(fit, noffset, &ndepth);
 332         }
 333
 334         return ret;
 335 }