mirror of
https://github.com/AsahiLinux/u-boot
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154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
/*
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* (C) Copyright 2001-2003
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* Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <ppc4xx.h>
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#include <asm/processor.h>
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/*
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* include common flash code (for esd boards)
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*/
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#include "../common/flash.c"
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static ulong flash_get_size (vu_long * addr, flash_info_t * info);
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static void flash_get_offsets (ulong base, flash_info_t * info);
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/*-----------------------------------------------------------------------
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*/
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unsigned long calc_size(unsigned long size)
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{
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switch (size) {
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case 1 << 20:
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return 0;
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case 2 << 20:
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return 1;
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case 4 << 20:
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return 2;
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case 8 << 20:
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return 3;
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case 16 << 20:
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return 4;
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default:
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return 0;
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}
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}
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unsigned long flash_init (void)
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{
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unsigned long size_b0, size_b1;
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int i;
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uint pbcr;
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unsigned long base_b0, base_b1;
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/* Init: no FLASHes known */
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/* Static FLASH Bank configuration here - FIXME XXX */
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base_b0 = FLASH_BASE0_PRELIM;
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size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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size_b0, size_b0 << 20);
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}
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base_b1 = FLASH_BASE1_PRELIM;
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size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
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/* Re-do sizing to get full correct info */
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if (size_b1) {
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if (size_b1 < (1 << 20)) {
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/* minimum CS size on PPC405GP is 1MB !!! */
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size_b1 = 1 << 20;
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}
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base_b1 = -size_b1;
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mtdcr (ebccfga, pb0cr);
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pbcr = mfdcr (ebccfgd);
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mtdcr (ebccfga, pb0cr);
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pbcr = (pbcr & 0x0001ffff) | base_b1 | (calc_size(size_b1) << 17);
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mtdcr (ebccfgd, pbcr);
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#if 0 /* test-only */
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printf("size_b1=%x base_b1=%x pb1cr = %x\n",
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size_b1, base_b1, pbcr); /* test-only */
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#endif
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}
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if (size_b0) {
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if (size_b0 < (1 << 20)) {
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/* minimum CS size on PPC405GP is 1MB !!! */
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size_b0 = 1 << 20;
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}
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base_b0 = base_b1 - size_b0;
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mtdcr (ebccfga, pb1cr);
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pbcr = mfdcr (ebccfgd);
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mtdcr (ebccfga, pb1cr);
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pbcr = (pbcr & 0x0001ffff) | base_b0 | (calc_size(size_b0) << 17);
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mtdcr (ebccfgd, pbcr);
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#if 0 /* test-only */
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printf("size_b0=%x base_b0=%x pb0cr = %x\n",
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size_b0, base_b0, pbcr); /* test-only */
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#endif
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}
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size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
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flash_get_offsets (base_b0, &flash_info[0]);
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/* monitor protection ON by default */
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flash_protect (FLAG_PROTECT_SET,
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base_b0 + size_b0 - monitor_flash_len,
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base_b0 + size_b0 - 1, &flash_info[0]);
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if (size_b1) {
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/* Re-do sizing to get full correct info */
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size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
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flash_get_offsets (base_b1, &flash_info[1]);
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/* monitor protection ON by default */
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flash_protect (FLAG_PROTECT_SET,
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base_b1 + size_b1 - monitor_flash_len,
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base_b1 + size_b1 - 1, &flash_info[1]);
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/* monitor protection OFF by default (one is enough) */
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flash_protect (FLAG_PROTECT_CLEAR,
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base_b0 + size_b0 - monitor_flash_len,
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base_b0 + size_b0 - 1, &flash_info[0]);
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} else {
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flash_info[1].flash_id = FLASH_UNKNOWN;
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flash_info[1].sector_count = -1;
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}
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flash_info[0].size = size_b0;
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flash_info[1].size = size_b1;
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return (size_b0 + size_b1);
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}
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