board/psyent/common/AMDLV065D.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24
  25 #include <common.h>
  26 #if defined(CONFIG_NIOS)
  27 #include <nios.h>
  28 #else
  29 #include <nios2.h>
  30 #endif
  31
  32 #define SECTSZ          (64 * 1024)
  33 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
  34
  35 /*----------------------------------------------------------------------*/
  36 unsigned long flash_init (void)
  37 {
  38         int i;
  39         unsigned long addr;
  40         flash_info_t *fli = &flash_info[0];
  41
  42         fli->size = CFG_FLASH_SIZE;
  43         fli->sector_count = CFG_MAX_FLASH_SECT;
  44         fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
  45
  46         addr = CFG_FLASH_BASE;
  47         for (i = 0; i < fli->sector_count; ++i) {
  48                 fli->start[i] = addr;
  49                 addr += SECTSZ;
  50                 fli->protect[i] = 1;
  51         }
  52
  53         return (CFG_FLASH_SIZE);
  54 }
  55 /*--------------------------------------------------------------------*/
  56 void flash_print_info (flash_info_t * info)
  57 {
  58         int i, k;
  59         unsigned long size;
  60         int erased;
  61         volatile unsigned char *flash;
  62
  63         printf ("  Size: %ld KB in %d Sectors\n",
  64                 info->size >> 10, info->sector_count);
  65         printf ("  Sector Start Addresses:");
  66         for (i = 0; i < info->sector_count; ++i) {
  67
  68                 /* Check if whole sector is erased */
  69                 if (i != (info->sector_count - 1))
  70                         size = info->start[i + 1] - info->start[i];
  71                 else
  72                         size = info->start[0] + info->size - info->start[i];
  73                 erased = 1;
  74                 flash = (volatile unsigned char *) CACHE_BYPASS(info->start[i]);
  75                 for (k = 0; k < size; k++) {
  76                         if (*flash++ != 0xff) {
  77                                 erased = 0;
  78                                 break;
  79                         }
  80                 }
  81
  82                 /* Print the info */
  83                 if ((i % 5) == 0)
  84                         printf ("\n   ");
  85                 printf (" %08lX%s%s",
  86                         CACHE_NO_BYPASS(info->start[i]),
  87                         erased ? " E" : "  ",
  88                         info->protect[i] ? "RO " : "   ");
  89         }
  90         printf ("\n");
  91 }
  92
  93 /*-------------------------------------------------------------------*/
  94
  95
  96 int flash_erase (flash_info_t * info, int s_first, int s_last)
  97 {
  98         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *)
  99                 CACHE_BYPASS(info->start[0]);
 100         volatile CFG_FLASH_WORD_SIZE *addr2;
 101         int prot, sect;
 102         ulong start;
 103
 104         /* Some sanity checking */
 105         if ((s_first < 0) || (s_first > s_last)) {
 106                 printf ("- no sectors to erase\n");
 107                 return 1;
 108         }
 109
 110         prot = 0;
 111         for (sect = s_first; sect <= s_last; ++sect) {
 112                 if (info->protect[sect]) {
 113                         prot++;
 114                 }
 115         }
 116         if (prot) {
 117                 printf ("- Warning: %d protected sectors will not be erased!\n",
 118                         prot);
 119         } else {
 120                 printf ("\n");
 121         }
 122
 123         /* It's ok to erase multiple sectors provided we don't delay more
 124          * than 50 usec between cmds ... at which point the erase time-out
 125          * occurs. So don't go and put printf() calls in the loop ... it
 126          * won't be very helpful ;-)
 127          */
 128         for (sect = s_first; sect <= s_last; sect++) {
 129                 if (info->protect[sect] == 0) { /* not protected */
 130                         addr2 = (CFG_FLASH_WORD_SIZE *)
 131                                 CACHE_BYPASS((info->start[sect]));
 132                         *addr = 0xaa;
 133                         *addr = 0x55;
 134                         *addr = 0x80;
 135                         *addr = 0xaa;
 136                         *addr = 0x55;
 137                         *addr2 = 0x30;
 138                         /* Now just wait for 0xff & provide some user
 139                          * feedback while we wait.
 140                          */
 141                         start = get_timer (0);
 142                         while (*addr2 != 0xff) {
 143                                 udelay (1000 * 1000);
 144                                 putc ('.');
 145                                 if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
 146                                         printf ("timeout\n");
 147                                         return 1;
 148                                 }
 149                         }
 150                 }
 151         }
 152         printf ("\n");
 153         return 0;
 154 }
 155
 156 /*-----------------------------------------------------------------------
 157  * Copy memory to flash, returns:
 158  * 0 - OK
 159  * 1 - write timeout
 160  * 2 - Flash not erased
 161  */
 162
 163 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 164 {
 165
 166         vu_char *cmd = (vu_char *) CACHE_BYPASS(info->start[0]);
 167         vu_char *dst = (vu_char *) CACHE_BYPASS(addr);
 168         unsigned char b;
 169         ulong start;
 170
 171         while (cnt) {
 172                 /* Check for sufficient erase */
 173                 b = *src;
 174                 if ((*dst & b) != b) {
 175                         printf ("%02x : %02x\n", *dst, b);
 176                         return (2);
 177                 }
 178
 179                 *cmd = 0xaa;
 180                 *cmd = 0x55;
 181                 *cmd = 0xa0;
 182                 *dst = b;
 183
 184                 /* Verify write */
 185                 start = get_timer (0);
 186                 while (*dst != b) {
 187                         if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 188                                 return 1;
 189                         }
 190                 }
 191                 dst++;
 192                 src++;
 193                 cnt--;
 194         }
 195
 196         return (0);
 197 }