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 #if defined(CONFIG_NIOS)
  11 #include <nios.h>
  12 #else
  13 #include <asm/io.h>
  14 #endif
  15
  16 #define SECTSZ          (64 * 1024)
  17 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  18
  19 /*----------------------------------------------------------------------*/
  20 unsigned long flash_init (void)
  21 {
  22         int i;
  23         unsigned long addr;
  24         flash_info_t *fli = &flash_info[0];
  25
  26         fli->size = CONFIG_SYS_FLASH_SIZE;
  27         fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  28         fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
  29
  30         addr = CONFIG_SYS_FLASH_BASE;
  31         for (i = 0; i < fli->sector_count; ++i) {
  32                 fli->start[i] = addr;
  33                 addr += SECTSZ;
  34                 fli->protect[i] = 1;
  35         }
  36
  37         return (CONFIG_SYS_FLASH_SIZE);
  38 }
  39 /*--------------------------------------------------------------------*/
  40 void flash_print_info (flash_info_t * info)
  41 {
  42         int i, k;
  43         int erased;
  44         unsigned long *addr;
  45
  46         printf ("  Size: %ld KB in %d Sectors\n",
  47                 info->size >> 10, info->sector_count);
  48         printf ("  Sector Start Addresses:");
  49         for (i = 0; i < info->sector_count; ++i) {
  50
  51                 /* Check if whole sector is erased */
  52                 erased = 1;
  53                 addr = (unsigned long *) info->start[i];
  54                 for (k = 0; k < SECTSZ/sizeof(unsigned long); k++) {
  55                         if ( readl(addr++) != (unsigned long)-1) {
  56                                 erased = 0;
  57                                 break;
  58                         }
  59                 }
  60
  61                 /* Print the info */
  62                 if ((i % 5) == 0)
  63                         printf ("\n   ");
  64                 printf (" %08lX%s%s",
  65                         info->start[i],
  66                         erased ? " E" : "  ",
  67                         info->protect[i] ? "RO " : "   ");
  68         }
  69         printf ("\n");
  70 }
  71
  72 /*-------------------------------------------------------------------*/
  73
  74
  75 int flash_erase (flash_info_t * info, int s_first, int s_last)
  76 {
  77         unsigned char *addr = (unsigned char *) info->start[0];
  78         unsigned char *addr2;
  79         int prot, sect;
  80         ulong start;
  81
  82         /* Some sanity checking */
  83         if ((s_first < 0) || (s_first > s_last)) {
  84                 printf ("- no sectors to erase\n");
  85                 return 1;
  86         }
  87
  88         prot = 0;
  89         for (sect = s_first; sect <= s_last; ++sect) {
  90                 if (info->protect[sect]) {
  91                         prot++;
  92                 }
  93         }
  94         if (prot) {
  95                 printf ("- Warning: %d protected sectors will not be erased!\n",
  96                         prot);
  97         } else {
  98                 printf ("\n");
  99         }
 100
 101         /* It's ok to erase multiple sectors provided we don't delay more
 102          * than 50 usec between cmds ... at which point the erase time-out
 103          * occurs. So don't go and put printf() calls in the loop ... it
 104          * won't be very helpful ;-)
 105          */
 106         for (sect = s_first; sect <= s_last; sect++) {
 107                 if (info->protect[sect] == 0) { /* not protected */
 108                         addr2 = (unsigned char *) info->start[sect];
 109                         writeb (0xaa, addr);
 110                         writeb (0x55, addr);
 111                         writeb (0x80, addr);
 112                         writeb (0xaa, addr);
 113                         writeb (0x55, addr);
 114                         writeb (0x30, addr2);
 115                         /* Now just wait for 0xff & provide some user
 116                          * feedback while we wait.
 117                          */
 118                         start = get_timer (0);
 119                         while ( readb (addr2) != 0xff) {
 120                                 udelay (1000 * 1000);
 121                                 putc ('.');
 122                                 if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 123                                         printf ("timeout\n");
 124                                         return 1;
 125                                 }
 126                         }
 127                 }
 128         }
 129         printf ("\n");
 130         return 0;
 131 }
 132
 133 /*-----------------------------------------------------------------------
 134  * Copy memory to flash, returns:
 135  * 0 - OK
 136  * 1 - write timeout
 137  * 2 - Flash not erased
 138  */
 139
 140 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 141 {
 142
 143         vu_char *cmd = (vu_char *) info->start[0];
 144         vu_char *dst = (vu_char *) addr;
 145         unsigned char b;
 146         ulong start;
 147
 148         while (cnt) {
 149                 /* Check for sufficient erase */
 150                 b = *src;
 151                 if ((readb (dst) & b) != b) {
 152                         printf ("%02x : %02x\n", readb (dst), b);
 153                         return (2);
 154                 }
 155
 156                 writeb (0xaa, cmd);
 157                 writeb (0x55, cmd);
 158                 writeb (0xa0, cmd);
 159                 writeb (dst, b);
 160
 161                 /* Verify write */
 162                 start = get_timer (0);
 163                 while (readb (dst) != b) {
 164                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 165                                 return 1;
 166                         }
 167                 }
 168                 dst++;
 169                 src++;
 170                 cnt--;
 171         }
 172
 173         return (0);
 174 }