board/esd/canbt/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
  33         /* Init: no FLASHes known */
  34         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  35                 flash_info[i].flash_id = FLASH_UNKNOWN;
  36         }
  37
  38         /* Static FLASH Bank configuration here - FIXME XXX */
  39
  40         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  41
  42         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  43                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  44                         size_b0, size_b0<<20);
  45         }
  46
  47         /* Setup offsets */
  48         flash_get_offsets (-size_b0, &flash_info[0]);
  49
  50         /* Re-do sizing to get full correct info */
  51         mtdcr(EBC0_CFGADDR, PB0CR);
  52         pbcr = mfdcr(EBC0_CFGDATA);
  53         mtdcr(EBC0_CFGADDR, PB0CR);
  54         base_b0 = -size_b0;
  55         pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
  56         mtdcr(EBC0_CFGDATA, pbcr);
  57         /*          printf("PB1CR = %x\n", pbcr); */
  58
  59         /* Monitor protection ON by default */
  60         (void)flash_protect(FLAG_PROTECT_SET,
  61                             -monitor_flash_len,
  62                             0xffffffff,
  63                             &flash_info[0]);
  64
  65         flash_info[0].size = size_b0;
  66
  67         return (size_b0);
  68 }