tools/updater/flash.c

   1 /*
   2  * (C) Copyright 2000-2006
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <flash.h>
  10
  11 extern flash_info_t  flash_info[]; /* info for FLASH chips */
  12
  13 /*-----------------------------------------------------------------------
  14  * Functions
  15  */
  16
  17 /*-----------------------------------------------------------------------
  18  * Set protection status for monitor sectors
  19  *
  20  * The monitor is always located in the _first_ Flash bank.
  21  * If necessary you have to map the second bank at lower addresses.
  22  */
  23 void
  24 flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
  25 {
  26         ulong b_end = info->start[0] + info->size - 1;  /* bank end address */
  27         short s_end = info->sector_count - 1;   /* index of last sector */
  28         int i;
  29
  30         /* Do nothing if input data is bad. */
  31         if (info->sector_count == 0 || info->size == 0 || to < from) {
  32                 return;
  33         }
  34
  35         /* There is nothing to do if we have no data about the flash
  36          * or the protect range and flash range don't overlap.
  37          */
  38         if (info->flash_id == FLASH_UNKNOWN ||
  39             to < info->start[0] || from > b_end) {
  40                 return;
  41         }
  42
  43         for (i=0; i<info->sector_count; ++i) {
  44                 ulong end;              /* last address in current sect */
  45
  46                 end = (i == s_end) ? b_end : info->start[i + 1] - 1;
  47
  48                 /* Update protection if any part of the sector
  49                  * is in the specified range.
  50                  */
  51                 if (from <= end && to >= info->start[i]) {
  52                         if (flag & FLAG_PROTECT_CLEAR) {
  53 #if defined(CONFIG_SYS_FLASH_PROTECTION)
  54                                 flash_real_protect(info, i, 0);
  55 #else
  56                                 info->protect[i] = 0;
  57 #endif  /* CONFIG_SYS_FLASH_PROTECTION */
  58                         }
  59                         else if (flag & FLAG_PROTECT_SET) {
  60 #if defined(CONFIG_SYS_FLASH_PROTECTION)
  61                                 flash_real_protect(info, i, 1);
  62 #else
  63                                 info->protect[i] = 1;
  64 #endif  /* CONFIG_SYS_FLASH_PROTECTION */
  65                         }
  66                 }
  67         }
  68 }
  69
  70 /*-----------------------------------------------------------------------
  71  */
  72
  73 flash_info_t *
  74 addr2info (ulong addr)
  75 {
  76 #ifndef CONFIG_SPD823TS
  77         flash_info_t *info;
  78         int i;
  79
  80         for (i=0, info = &flash_info[0]; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i, ++info) {
  81                 if (info->flash_id != FLASH_UNKNOWN &&
  82                     addr >= info->start[0] &&
  83                     /* WARNING - The '- 1' is needed if the flash
  84                      * is at the end of the address space, since
  85                      * info->start[0] + info->size wraps back to 0.
  86                      * Please don't change this unless you understand this.
  87                      */
  88                     addr <= info->start[0] + info->size - 1) {
  89                         return (info);
  90                 }
  91         }
  92 #endif /* CONFIG_SPD823TS */
  93
  94         return (NULL);
  95 }
  96
  97 /*-----------------------------------------------------------------------
  98  * Copy memory to flash.
  99  * Make sure all target addresses are within Flash bounds,
 100  * and no protected sectors are hit.
 101  * Returns:
 102  * ERR_OK          0 - OK
 103  * ERR_TIMOUT      1 - write timeout
 104  * ERR_NOT_ERASED  2 - Flash not erased
 105  * ERR_PROTECTED   4 - target range includes protected sectors
 106  * ERR_INVAL       8 - target address not in Flash memory
 107  * ERR_ALIGN       16 - target address not aligned on boundary
 108  *                      (only some targets require alignment)
 109  */
 110 int
 111 flash_write (char *src, ulong addr, ulong cnt)
 112 {
 113 #ifdef CONFIG_SPD823TS
 114         return (ERR_TIMOUT);    /* any other error codes are possible as well */
 115 #else
 116         int i;
 117         ulong         end        = addr + cnt - 1;
 118         flash_info_t *info_first = addr2info (addr);
 119         flash_info_t *info_last  = addr2info (end );
 120         flash_info_t *info;
 121         int j;
 122
 123         if (cnt == 0) {
 124                 return (ERR_OK);
 125         }
 126
 127         if (!info_first || !info_last) {
 128                 return (ERR_INVAL);
 129         }
 130
 131         for (info = info_first; info <= info_last; ++info) {
 132                 ulong b_end = info->start[0] + info->size;      /* bank end addr */
 133                 short s_end = info->sector_count - 1;
 134                 for (i=0; i<info->sector_count; ++i) {
 135                         ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
 136
 137                         if ((end >= info->start[i]) && (addr < e_addr) &&
 138                             (info->protect[i] != 0) ) {
 139                                 return (ERR_PROTECTED);
 140                         }
 141                 }
 142         }
 143
 144         printf("\rWriting ");
 145         for (j=0; j<20; j++) putc(177);
 146         printf("\rWriting ");
 147
 148         /* finally write data to flash */
 149         for (info = info_first; info <= info_last && cnt>0; ++info) {
 150                 ulong len;
 151
 152                 len = info->start[0] + info->size - addr;
 153                 if (len > cnt)
 154                         len = cnt;
 155
 156                 if ((i = write_buff(info, src, addr, len)) != 0) {
 157                         return (i);
 158                 }
 159                 cnt  -= len;
 160                 addr += len;
 161                 src  += len;
 162         }
 163         return (ERR_OK);
 164 #endif /* CONFIG_SPD823TS */
 165 }
 166
 167 /*-----------------------------------------------------------------------
 168  */