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 <asm/io.h>
  30 #endif
  31
  32 #define SECTSZ          (64 * 1024)
  33 flash_info_t flash_info[CONFIG_SYS_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 = CONFIG_SYS_FLASH_SIZE;
  43         fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  44         fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
  45
  46         addr = CONFIG_SYS_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 (CONFIG_SYS_FLASH_SIZE);
  54 }
  55 /*--------------------------------------------------------------------*/
  56 void flash_print_info (flash_info_t * info)
  57 {
  58         int i, k;
  59         int erased;
  60         unsigned long *addr;
  61
  62         printf ("  Size: %ld KB in %d Sectors\n",
  63                 info->size >> 10, info->sector_count);
  64         printf ("  Sector Start Addresses:");
  65         for (i = 0; i < info->sector_count; ++i) {
  66
  67                 /* Check if whole sector is erased */
  68                 erased = 1;
  69                 addr = (unsigned long *) info->start[i];
  70                 for (k = 0; k < SECTSZ/sizeof(unsigned long); k++) {
  71                         if ( readl(addr++) != (unsigned long)-1) {
  72                                 erased = 0;
  73                                 break;
  74                         }
  75                 }
  76
  77                 /* Print the info */
  78                 if ((i % 5) == 0)
  79                         printf ("\n   ");
  80                 printf (" %08lX%s%s",
  81                         info->start[i],
  82                         erased ? " E" : "  ",
  83                         info->protect[i] ? "RO " : "   ");
  84         }
  85         printf ("\n");
  86 }
  87
  88 /*-------------------------------------------------------------------*/
  89
  90
  91 int flash_erase (flash_info_t * info, int s_first, int s_last)
  92 {
  93         unsigned char *addr = (unsigned char *) info->start[0];
  94         unsigned char *addr2;
  95         int prot, sect;
  96         ulong start;
  97
  98         /* Some sanity checking */
  99         if ((s_first < 0) || (s_first > s_last)) {
 100                 printf ("- no sectors to erase\n");
 101                 return 1;
 102         }
 103
 104         prot = 0;
 105         for (sect = s_first; sect <= s_last; ++sect) {
 106                 if (info->protect[sect]) {
 107                         prot++;
 108                 }
 109         }
 110         if (prot) {
 111                 printf ("- Warning: %d protected sectors will not be erased!\n",
 112                         prot);
 113         } else {
 114                 printf ("\n");
 115         }
 116
 117         /* It's ok to erase multiple sectors provided we don't delay more
 118          * than 50 usec between cmds ... at which point the erase time-out
 119          * occurs. So don't go and put printf() calls in the loop ... it
 120          * won't be very helpful ;-)
 121          */
 122         for (sect = s_first; sect <= s_last; sect++) {
 123                 if (info->protect[sect] == 0) { /* not protected */
 124                         addr2 = (unsigned char *) info->start[sect];
 125                         writeb (0xaa, addr);
 126                         writeb (0x55, addr);
 127                         writeb (0x80, addr);
 128                         writeb (0xaa, addr);
 129                         writeb (0x55, addr);
 130                         writeb (0x30, addr2);
 131                         /* Now just wait for 0xff & provide some user
 132                          * feedback while we wait.
 133                          */
 134                         start = get_timer (0);
 135                         while ( readb (addr2) != 0xff) {
 136                                 udelay (1000 * 1000);
 137                                 putc ('.');
 138                                 if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 139                                         printf ("timeout\n");
 140                                         return 1;
 141                                 }
 142                         }
 143                 }
 144         }
 145         printf ("\n");
 146         return 0;
 147 }
 148
 149 /*-----------------------------------------------------------------------
 150  * Copy memory to flash, returns:
 151  * 0 - OK
 152  * 1 - write timeout
 153  * 2 - Flash not erased
 154  */
 155
 156 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 157 {
 158
 159         vu_char *cmd = (vu_char *) info->start[0];
 160         vu_char *dst = (vu_char *) addr;
 161         unsigned char b;
 162         ulong start;
 163
 164         while (cnt) {
 165                 /* Check for sufficient erase */
 166                 b = *src;
 167                 if ((readb (dst) & b) != b) {
 168                         printf ("%02x : %02x\n", readb (dst), b);
 169                         return (2);
 170                 }
 171
 172                 writeb (0xaa, cmd);
 173                 writeb (0x55, cmd);
 174                 writeb (0xa0, cmd);
 175                 writeb (dst, b);
 176
 177                 /* Verify write */
 178                 start = get_timer (0);
 179                 while (readb (dst) != b) {
 180                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 181                                 return 1;
 182                         }
 183                 }
 184                 dst++;
 185                 src++;
 186                 cnt--;
 187         }
 188
 189         return (0);
 190 }