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/board/esd/hub405/flash.c

https://gitlab.com/vogoplayer-tools/uboot
C | 101 lines | 52 code | 14 blank | 35 comment | 4 complexity | 156c549344914fc88614cf98d26a1552 MD5 | raw file
  1/*
  2 * (C) Copyright 2001
  3 * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
  4 *
  5 * See file CREDITS for list of people who contributed to this
  6 * project.
  7 *
  8 * This program is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU General Public License as
 10 * published by the Free Software Foundation; either version 2 of
 11 * the License, or (at your option) any later version.
 12 *
 13 * This program is distributed in the hope that it will be useful,
 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16 * GNU General Public License for more details.
 17 *
 18 * You should have received a copy of the GNU General Public License
 19 * along with this program; if not, write to the Free Software
 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 21 * MA 02111-1307 USA
 22 */
 23
 24#include <common.h>
 25#include <ppc4xx.h>
 26#include <asm/processor.h>
 27
 28/*
 29 * include common flash code (for esd boards)
 30 */
 31#include "../common/flash.c"
 32
 33/*-----------------------------------------------------------------------
 34 * Functions
 35 */
 36static ulong flash_get_size (vu_long * addr, flash_info_t * info);
 37static void flash_get_offsets (ulong base, flash_info_t * info);
 38
 39/*-----------------------------------------------------------------------
 40 */
 41
 42unsigned long flash_init (void)
 43{
 44	unsigned long size_b0;
 45	int i;
 46	uint pbcr;
 47	unsigned long base_b0;
 48	int size_val = 0;
 49
 50	/* Init: no FLASHes known */
 51	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 52		flash_info[i].flash_id = FLASH_UNKNOWN;
 53	}
 54
 55	/* Static FLASH Bank configuration here - FIXME XXX */
 56
 57	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
 58
 59	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 60		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 61			size_b0, size_b0<<20);
 62	}
 63
 64	/* Setup offsets */
 65	flash_get_offsets (-size_b0, &flash_info[0]);
 66
 67	/* Re-do sizing to get full correct info */
 68	mtdcr(ebccfga, pb0cr);
 69	pbcr = mfdcr(ebccfgd);
 70	mtdcr(ebccfga, pb0cr);
 71	base_b0 = -size_b0;
 72	switch (size_b0) {
 73	case 1 << 20:
 74		size_val = 0;
 75		break;
 76	case 2 << 20:
 77		size_val = 1;
 78		break;
 79	case 4 << 20:
 80		size_val = 2;
 81		break;
 82	case 8 << 20:
 83		size_val = 3;
 84		break;
 85	case 16 << 20:
 86		size_val = 4;
 87		break;
 88	}
 89	pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
 90	mtdcr(ebccfgd, pbcr);
 91
 92	/* Monitor protection ON by default */
 93	(void)flash_protect(FLAG_PROTECT_SET,
 94			    -CFG_MONITOR_LEN,
 95			    0xffffffff,
 96			    &flash_info[0]);
 97
 98	flash_info[0].size = size_b0;
 99
100	return (size_b0);
101}