board/psyent/common/AMDLV065D.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8
   9 #include <common.h>
  10 #include <asm/io.h>
  11
  12 #define SECTSZ          (64 * 1024)
  13 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  14
  15 /*----------------------------------------------------------------------*/
  16 unsigned long flash_init (void)
  17 {
  18         int i;
  19         unsigned long addr;
  20         flash_info_t *fli = &flash_info[0];
  21
  22         fli->size = CONFIG_SYS_FLASH_SIZE;
  23         fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  24         fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
  25
  26         addr = CONFIG_SYS_FLASH_BASE;
  27         for (i = 0; i < fli->sector_count; ++i) {
  28                 fli->start[i] = addr;
  29                 addr += SECTSZ;
  30                 fli->protect[i] = 1;
  31         }
  32
  33         return (CONFIG_SYS_FLASH_SIZE);
  34 }
  35 /*--------------------------------------------------------------------*/
  36 void flash_print_info (flash_info_t * info)
  37 {
  38         int i, k;
  39         int erased;
  40         unsigned long *addr;
  41
  42         printf ("  Size: %ld KB in %d Sectors\n",
  43                 info->size >> 10, info->sector_count);
  44         printf ("  Sector Start Addresses:");
  45         for (i = 0; i < info->sector_count; ++i) {
  46
  47                 /* Check if whole sector is erased */
  48                 erased = 1;
  49                 addr = (unsigned long *) info->start[i];
  50                 for (k = 0; k < SECTSZ/sizeof(unsigned long); k++) {
  51                         if ( readl(addr++) != (unsigned long)-1) {
  52                                 erased = 0;
  53                                 break;
  54                         }
  55                 }
  56
  57                 /* Print the info */
  58                 if ((i % 5) == 0)
  59                         printf ("\n   ");
  60                 printf (" %08lX%s%s",
  61                         info->start[i],
  62                         erased ? " E" : "  ",
  63                         info->protect[i] ? "RO " : "   ");
  64         }
  65         printf ("\n");
  66 }
  67
  68 /*-------------------------------------------------------------------*/
  69
  70
  71 int flash_erase (flash_info_t * info, int s_first, int s_last)
  72 {
  73         unsigned char *addr = (unsigned char *) info->start[0];
  74         unsigned char *addr2;
  75         int prot, sect;
  76         ulong start;
  77
  78         /* Some sanity checking */
  79         if ((s_first < 0) || (s_first > s_last)) {
  80                 printf ("- no sectors to erase\n");
  81                 return 1;
  82         }
  83
  84         prot = 0;
  85         for (sect = s_first; sect <= s_last; ++sect) {
  86                 if (info->protect[sect]) {
  87                         prot++;
  88                 }
  89         }
  90         if (prot) {
  91                 printf ("- Warning: %d protected sectors will not be erased!\n",
  92                         prot);
  93         } else {
  94                 printf ("\n");
  95         }
  96
  97         /* It's ok to erase multiple sectors provided we don't delay more
  98          * than 50 usec between cmds ... at which point the erase time-out
  99          * occurs. So don't go and put printf() calls in the loop ... it
 100          * won't be very helpful ;-)
 101          */
 102         for (sect = s_first; sect <= s_last; sect++) {
 103                 if (info->protect[sect] == 0) { /* not protected */
 104                         addr2 = (unsigned char *) info->start[sect];
 105                         writeb (0xaa, addr);
 106                         writeb (0x55, addr);
 107                         writeb (0x80, addr);
 108                         writeb (0xaa, addr);
 109                         writeb (0x55, addr);
 110                         writeb (0x30, addr2);
 111                         /* Now just wait for 0xff & provide some user
 112                          * feedback while we wait.
 113                          */
 114                         start = get_timer (0);
 115                         while ( readb (addr2) != 0xff) {
 116                                 udelay (1000 * 1000);
 117                                 putc ('.');
 118                                 if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 119                                         printf ("timeout\n");
 120                                         return 1;
 121                                 }
 122                         }
 123                 }
 124         }
 125         printf ("\n");
 126         return 0;
 127 }
 128
 129 /*-----------------------------------------------------------------------
 130  * Copy memory to flash, returns:
 131  * 0 - OK
 132  * 1 - write timeout
 133  * 2 - Flash not erased
 134  */
 135
 136 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 137 {
 138
 139         vu_char *cmd = (vu_char *) info->start[0];
 140         vu_char *dst = (vu_char *) addr;
 141         unsigned char b;
 142         ulong start;
 143
 144         while (cnt) {
 145                 /* Check for sufficient erase */
 146                 b = *src;
 147                 if ((readb (dst) & b) != b) {
 148                         printf ("%02x : %02x\n", readb (dst), b);
 149                         return (2);
 150                 }
 151
 152                 writeb (0xaa, cmd);
 153                 writeb (0x55, cmd);
 154                 writeb (0xa0, cmd);
 155                 writeb (dst, b);
 156
 157                 /* Verify write */
 158                 start = get_timer (0);
 159                 while (readb (dst) != b) {
 160                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 161                                 return 1;
 162                         }
 163                 }
 164                 dst++;
 165                 src++;
 166                 cnt--;
 167         }
 168
 169         return (0);
 170 }