board/esd/ocrtc/flash.c

   1 /*
   2  * (C) Copyright 2001
   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 flash_init (void)
  27 {
  28         unsigned long size_b0, size_b1;
  29         int i;
  30         uint pbcr;
  31         unsigned long base_b0, base_b1;
  32         int size_val = 0;
  33
  34         /* Init: no FLASHes known */
  35         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  36                 flash_info[i].flash_id = FLASH_UNKNOWN;
  37         }
  38
  39         /* Static FLASH Bank configuration here - FIXME XXX */
  40
  41         base_b0 = FLASH_BASE0_PRELIM;
  42         size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
  43
  44         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  45                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  46                         size_b0, size_b0 << 20);
  47         }
  48
  49         base_b1 = FLASH_BASE1_PRELIM;
  50         size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
  51
  52         /* Re-do sizing to get full correct info */
  53
  54         if (size_b1) {
  55                 mtdcr (EBC0_CFGADDR, PB0CR);
  56                 pbcr = mfdcr (EBC0_CFGDATA);
  57                 mtdcr (EBC0_CFGADDR, PB0CR);
  58                 base_b1 = -size_b1;
  59                 switch (size_b1) {
  60                 case 1 << 20:
  61                         size_val = 0;
  62                         break;
  63                 case 2 << 20:
  64                         size_val = 1;
  65                         break;
  66                 case 4 << 20:
  67                         size_val = 2;
  68                         break;
  69                 case 8 << 20:
  70                         size_val = 3;
  71                         break;
  72                 case 16 << 20:
  73                         size_val = 4;
  74                         break;
  75                 }
  76                 pbcr = (pbcr & 0x0001ffff) | base_b1 | (size_val << 17);
  77                 mtdcr (EBC0_CFGDATA, pbcr);
  78                 /*          printf("PB1CR = %x\n", pbcr); */
  79         }
  80
  81         if (size_b0) {
  82                 mtdcr (EBC0_CFGADDR, PB1CR);
  83                 pbcr = mfdcr (EBC0_CFGDATA);
  84                 mtdcr (EBC0_CFGADDR, PB1CR);
  85                 base_b0 = base_b1 - size_b0;
  86                 switch (size_b1) {
  87                 case 1 << 20:
  88                         size_val = 0;
  89                         break;
  90                 case 2 << 20:
  91                         size_val = 1;
  92                         break;
  93                 case 4 << 20:
  94                         size_val = 2;
  95                         break;
  96                 case 8 << 20:
  97                         size_val = 3;
  98                         break;
  99                 case 16 << 20:
 100                         size_val = 4;
 101                         break;
 102                 }
 103                 pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
 104                 mtdcr (EBC0_CFGDATA, pbcr);
 105                 /*            printf("PB0CR = %x\n", pbcr); */
 106         }
 107
 108         size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
 109
 110         flash_get_offsets (base_b0, &flash_info[0]);
 111
 112         /* monitor protection ON by default */
 113         flash_protect (FLAG_PROTECT_SET,
 114                         base_b0 + size_b0 - monitor_flash_len,
 115                         base_b0 + size_b0 - 1, &flash_info[0]);
 116
 117         if (size_b1) {
 118                 /* Re-do sizing to get full correct info */
 119                 size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
 120
 121                 flash_get_offsets (base_b1, &flash_info[1]);
 122
 123                 /* monitor protection ON by default */
 124                 flash_protect (FLAG_PROTECT_SET,
 125                                 base_b1 + size_b1 - monitor_flash_len,
 126                                 base_b1 + size_b1 - 1, &flash_info[1]);
 127                 /* monitor protection OFF by default (one is enough) */
 128                 flash_protect (FLAG_PROTECT_CLEAR,
 129                                 base_b0 + size_b0 - monitor_flash_len,
 130                                 base_b0 + size_b0 - 1, &flash_info[0]);
 131         } else {
 132                 flash_info[1].flash_id = FLASH_UNKNOWN;
 133                 flash_info[1].sector_count = -1;
 134         }
 135
 136         flash_info[0].size = size_b0;
 137         flash_info[1].size = size_b1;
 138
 139         return (size_b0 + size_b1);
 140 }