board/esd/cpci405/flash.c

   1 /*
   2  * (C) Copyright 2001-2003
   3  * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/ppc4xx.h>
  10 #include <asm/processor.h>
  11
  12 /*
  13  * include common flash code (for esd boards)
  14  */
  15 #include "../common/flash.c"
  16
  17 /*-----------------------------------------------------------------------
  18  * Functions
  19  */
  20 static ulong flash_get_size (vu_long * addr, flash_info_t * info);
  21 static void flash_get_offsets (ulong base, flash_info_t * info);
  22
  23 /*-----------------------------------------------------------------------
  24  */
  25
  26 unsigned long calc_size(unsigned long size)
  27 {
  28         switch (size) {
  29         case 1 << 20:
  30                 return 0;
  31         case 2 << 20:
  32                 return 1;
  33         case 4 << 20:
  34                 return 2;
  35         case 8 << 20:
  36                 return 3;
  37         case 16 << 20:
  38                 return 4;
  39         default:
  40                 return 0;
  41         }
  42 }
  43
  44
  45 unsigned long flash_init (void)
  46 {
  47         unsigned long size_b0, size_b1;
  48         int i;
  49         uint pbcr;
  50         unsigned long base_b0, base_b1;
  51
  52         /* Init: no FLASHes known */
  53         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  54                 flash_info[i].flash_id = FLASH_UNKNOWN;
  55         }
  56
  57         /* Static FLASH Bank configuration here - FIXME XXX */
  58
  59         base_b0 = FLASH_BASE0_PRELIM;
  60         size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
  61
  62         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  63                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  64                                 size_b0, size_b0 << 20);
  65         }
  66
  67         base_b1 = FLASH_BASE1_PRELIM;
  68         size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
  69
  70         /* Re-do sizing to get full correct info */
  71
  72         if (size_b1) {
  73                 if (size_b1 < (1 << 20)) {
  74                         /* minimum CS size on PPC405GP is 1MB !!! */
  75                         size_b1 = 1 << 20;
  76                 }
  77                 base_b1 = -size_b1;
  78                 mtdcr (EBC0_CFGADDR, PB0CR);
  79                 pbcr = mfdcr (EBC0_CFGDATA);
  80                 mtdcr (EBC0_CFGADDR, PB0CR);
  81                 pbcr = (pbcr & 0x0001ffff) | base_b1 | (calc_size(size_b1) << 17);
  82                 mtdcr (EBC0_CFGDATA, pbcr);
  83 #if 0 /* test-only */
  84                 printf("size_b1=%x base_b1=%x PB1CR = %x\n",
  85                        size_b1, base_b1, pbcr); /* test-only */
  86 #endif
  87         }
  88
  89         if (size_b0) {
  90                 if (size_b0 < (1 << 20)) {
  91                         /* minimum CS size on PPC405GP is 1MB !!! */
  92                         size_b0 = 1 << 20;
  93                 }
  94                 base_b0 = base_b1 - size_b0;
  95                 mtdcr (EBC0_CFGADDR, PB1CR);
  96                 pbcr = mfdcr (EBC0_CFGDATA);
  97                 mtdcr (EBC0_CFGADDR, PB1CR);
  98                 pbcr = (pbcr & 0x0001ffff) | base_b0 | (calc_size(size_b0) << 17);
  99                 mtdcr (EBC0_CFGDATA, pbcr);
 100 #if 0 /* test-only */
 101                 printf("size_b0=%x base_b0=%x PB0CR = %x\n",
 102                        size_b0, base_b0, pbcr); /* test-only */
 103 #endif
 104         }
 105
 106         size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
 107
 108         flash_get_offsets (base_b0, &flash_info[0]);
 109
 110         /* monitor protection ON by default */
 111         flash_protect (FLAG_PROTECT_SET,
 112                         base_b0 + size_b0 - monitor_flash_len,
 113                         base_b0 + size_b0 - 1, &flash_info[0]);
 114
 115         if (size_b1) {
 116                 /* Re-do sizing to get full correct info */
 117                 size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
 118
 119                 flash_get_offsets (base_b1, &flash_info[1]);
 120
 121                 /* monitor protection ON by default */
 122                 flash_protect (FLAG_PROTECT_SET,
 123                                 base_b1 + size_b1 - monitor_flash_len,
 124                                 base_b1 + size_b1 - 1, &flash_info[1]);
 125                 /* monitor protection OFF by default (one is enough) */
 126                 flash_protect (FLAG_PROTECT_CLEAR,
 127                                 base_b0 + size_b0 - monitor_flash_len,
 128                                 base_b0 + size_b0 - 1, &flash_info[0]);
 129         } else {
 130                 flash_info[1].flash_id = FLASH_UNKNOWN;
 131                 flash_info[1].sector_count = -1;
 132         }
 133
 134         flash_info[0].size = size_b0;
 135         flash_info[1].size = size_b1;
 136
 137         return (size_b0 + size_b1);
 138 }