board/esd/ar405/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;
  29         int i;
  30         uint pbcr;
  31         unsigned long base_b0;
  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         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  42
  43         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  44                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  45                         size_b0, size_b0<<20);
  46         }
  47
  48         /* Setup offsets */
  49         flash_get_offsets (-size_b0, &flash_info[0]);
  50
  51         /* Re-do sizing to get full correct info */
  52         mtdcr(EBC0_CFGADDR, PB0CR);
  53         pbcr = mfdcr(EBC0_CFGDATA);
  54         mtdcr(EBC0_CFGADDR, PB0CR);
  55         base_b0 = -size_b0;
  56         switch (size_b0) {
  57         case 1 << 20:
  58                 size_val = 0;
  59                 break;
  60         case 2 << 20:
  61                 size_val = 1;
  62                 break;
  63         case 4 << 20:
  64                 size_val = 2;
  65                 break;
  66         case 8 << 20:
  67                 size_val = 3;
  68                 break;
  69         case 16 << 20:
  70                 size_val = 4;
  71                 break;
  72         }
  73         pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
  74         mtdcr(EBC0_CFGDATA, pbcr);
  75
  76         /* Monitor protection ON by default */
  77         (void)flash_protect(FLAG_PROTECT_SET,
  78                             -CONFIG_SYS_MONITOR_LEN,
  79                             0xffffffff,
  80                             &flash_info[0]);
  81
  82         flash_info[0].size = size_b0;
  83
  84         return (size_b0);
  85 }