common/flash.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /* #define DEBUG */
   9
  10 #include <common.h>
  11 #include <flash.h>
  12
  13 #if !defined(CONFIG_SYS_NO_FLASH)
  14 #include <mtd/cfi_flash.h>
  15
  16 extern flash_info_t  flash_info[]; /* info for FLASH chips */
  17
  18 /*-----------------------------------------------------------------------
  19  * Functions
  20  */
  21
  22 /*-----------------------------------------------------------------------
  23  * Set protection status for monitor sectors
  24  *
  25  * The monitor is always located in the _first_ Flash bank.
  26  * If necessary you have to map the second bank at lower addresses.
  27  */
  28 void
  29 flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
  30 {
  31         ulong b_end;
  32         short s_end;
  33         int i;
  34
  35         /* Do nothing if input data is bad. */
  36         if (!info || info->sector_count == 0 || info->size == 0 || to < from) {
  37                 return;
  38         }
  39
  40         s_end = info->sector_count - 1; /* index of last sector */
  41         b_end = info->start[0] + info->size - 1;        /* bank end address */
  42
  43         debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n",
  44                 (flag & FLAG_PROTECT_SET) ? "ON" :
  45                         (flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???",
  46                 from, to);
  47
  48         /* There is nothing to do if we have no data about the flash
  49          * or the protect range and flash range don't overlap.
  50          */
  51         if (info->flash_id == FLASH_UNKNOWN ||
  52             to < info->start[0] || from > b_end) {
  53                 return;
  54         }
  55
  56         for (i=0; i<info->sector_count; ++i) {
  57                 ulong end;              /* last address in current sect */
  58
  59                 end = (i == s_end) ? b_end : info->start[i + 1] - 1;
  60
  61                 /* Update protection if any part of the sector
  62                  * is in the specified range.
  63                  */
  64                 if (from <= end && to >= info->start[i]) {
  65                         if (flag & FLAG_PROTECT_CLEAR) {
  66 #if defined(CONFIG_SYS_FLASH_PROTECTION)
  67                                 flash_real_protect(info, i, 0);
  68 #else
  69                                 info->protect[i] = 0;
  70 #endif  /* CONFIG_SYS_FLASH_PROTECTION */
  71                                 debug ("protect off %d\n", i);
  72                         }
  73                         else if (flag & FLAG_PROTECT_SET) {
  74 #if defined(CONFIG_SYS_FLASH_PROTECTION)
  75                                 flash_real_protect(info, i, 1);
  76 #else
  77                                 info->protect[i] = 1;
  78 #endif  /* CONFIG_SYS_FLASH_PROTECTION */
  79                                 debug ("protect on %d\n", i);
  80                         }
  81                 }
  82         }
  83 }
  84
  85 /*-----------------------------------------------------------------------
  86  */
  87
  88 flash_info_t *
  89 addr2info (ulong addr)
  90 {
  91 #ifndef CONFIG_SPD823TS
  92         flash_info_t *info;
  93         int i;
  94
  95         for (i=0, info = &flash_info[0]; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i, ++info) {
  96                 if (info->flash_id != FLASH_UNKNOWN &&
  97                     addr >= info->start[0] &&
  98                     /* WARNING - The '- 1' is needed if the flash
  99                      * is at the end of the address space, since
 100                      * info->start[0] + info->size wraps back to 0.
 101                      * Please don't change this unless you understand this.
 102                      */
 103                     addr <= info->start[0] + info->size - 1) {
 104                         return (info);
 105                 }
 106         }
 107 #endif /* CONFIG_SPD823TS */
 108
 109         return (NULL);
 110 }
 111
 112 /*-----------------------------------------------------------------------
 113  * Copy memory to flash.
 114  * Make sure all target addresses are within Flash bounds,
 115  * and no protected sectors are hit.
 116  * Returns:
 117  * ERR_OK          0 - OK
 118  * ERR_TIMOUT      1 - write timeout
 119  * ERR_NOT_ERASED  2 - Flash not erased
 120  * ERR_PROTECTED   4 - target range includes protected sectors
 121  * ERR_INVAL       8 - target address not in Flash memory
 122  * ERR_ALIGN       16 - target address not aligned on boundary
 123  *                      (only some targets require alignment)
 124  */
 125 int
 126 flash_write (char *src, ulong addr, ulong cnt)
 127 {
 128 #ifdef CONFIG_SPD823TS
 129         return (ERR_TIMOUT);    /* any other error codes are possible as well */
 130 #else
 131         int i;
 132         ulong         end        = addr + cnt - 1;
 133         flash_info_t *info_first = addr2info (addr);
 134         flash_info_t *info_last  = addr2info (end );
 135         flash_info_t *info;
 136         __maybe_unused char *src_orig = src;
 137         __maybe_unused char *addr_orig = (char *)addr;
 138         __maybe_unused ulong cnt_orig = cnt;
 139
 140         if (cnt == 0) {
 141                 return (ERR_OK);
 142         }
 143
 144         if (!info_first || !info_last) {
 145                 return (ERR_INVAL);
 146         }
 147
 148         for (info = info_first; info <= info_last; ++info) {
 149                 ulong b_end = info->start[0] + info->size;      /* bank end addr */
 150                 short s_end = info->sector_count - 1;
 151                 for (i=0; i<info->sector_count; ++i) {
 152                         ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
 153
 154                         if ((end >= info->start[i]) && (addr < e_addr) &&
 155                             (info->protect[i] != 0) ) {
 156                                 return (ERR_PROTECTED);
 157                         }
 158                 }
 159         }
 160
 161         /* finally write data to flash */
 162         for (info = info_first; info <= info_last && cnt>0; ++info) {
 163                 ulong len;
 164
 165                 len = info->start[0] + info->size - addr;
 166                 if (len > cnt)
 167                         len = cnt;
 168                 if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) {
 169                         return (i);
 170                 }
 171                 cnt  -= len;
 172                 addr += len;
 173                 src  += len;
 174         }
 175
 176 #if defined(CONFIG_FLASH_VERIFY)
 177         if (memcmp(src_orig, addr_orig, cnt_orig)) {
 178                 printf("\nVerify failed!\n");
 179                 return ERR_PROG_ERROR;
 180         }
 181 #endif /* CONFIG_SYS_FLASH_VERIFY_AFTER_WRITE */
 182
 183         return (ERR_OK);
 184 #endif /* CONFIG_SPD823TS */
 185 }
 186
 187 /*-----------------------------------------------------------------------
 188  */
 189
 190 void flash_perror (int err)
 191 {
 192         switch (err) {
 193         case ERR_OK:
 194                 break;
 195         case ERR_TIMOUT:
 196                 puts ("Timeout writing to Flash\n");
 197                 break;
 198         case ERR_NOT_ERASED:
 199                 puts ("Flash not Erased\n");
 200                 break;
 201         case ERR_PROTECTED:
 202                 puts ("Can't write to protected Flash sectors\n");
 203                 break;
 204         case ERR_INVAL:
 205                 puts ("Outside available Flash\n");
 206                 break;
 207         case ERR_ALIGN:
 208                 puts ("Start and/or end address not on sector boundary\n");
 209                 break;
 210         case ERR_UNKNOWN_FLASH_VENDOR:
 211                 puts ("Unknown Vendor of Flash\n");
 212                 break;
 213         case ERR_UNKNOWN_FLASH_TYPE:
 214                 puts ("Unknown Type of Flash\n");
 215                 break;
 216         case ERR_PROG_ERROR:
 217                 puts ("General Flash Programming Error\n");
 218                 break;
 219         case ERR_ABORTED:
 220                 puts("Flash Programming Aborted\n");
 221                 break;
 222         default:
 223                 printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
 224                 break;
 225         }
 226 }
 227
 228 /*-----------------------------------------------------------------------
 229  */
 230 #endif /* !CONFIG_SYS_NO_FLASH */