mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 02:20:25 +00:00
403 lines
9.5 KiB
C
403 lines
9.5 KiB
C
/*
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* U-boot - flash.c Flash driver for PSD4256GV
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*
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* Copyright (c) 2005 blackfin.uclinux.org
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* This file is based on BF533EzFlash.c originally written by Analog Devices, Inc.
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*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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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 <malloc.h>
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#include <config.h>
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#include <asm/io.h>
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#include "flash-defines.h"
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void flash_reset(void)
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{
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reset_flash();
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}
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unsigned long flash_get_size(ulong baseaddr, flash_info_t * info, int bank_flag)
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{
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int id = 0, i = 0;
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static int FlagDev = 1;
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id = get_codes();
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if (FlagDev) {
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FlagDev = 0;
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}
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info->flash_id = id;
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switch (bank_flag) {
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case 0:
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for (i = PriFlashABegin; i < SecFlashABegin; i++)
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info->start[i] = (baseaddr + (i * AFP_SectorSize1));
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for (i = SecFlashABegin; i < NUM_SECTORS; i++)
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info->start[i] =
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(baseaddr + SecFlashAOff +
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((i - SecFlashABegin) * AFP_SectorSize2));
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info->size = 0x400000;
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info->sector_count = NUM_SECTORS;
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break;
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case 1:
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info->start[0] = baseaddr + SecFlashASec1Off;
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info->start[1] = baseaddr + SecFlashASec2Off;
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info->start[2] = baseaddr + SecFlashASec3Off;
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info->start[3] = baseaddr + SecFlashASec4Off;
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info->size = 0x10000;
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info->sector_count = 4;
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break;
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case 2:
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info->start[0] = baseaddr + SecFlashBSec1Off;
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info->start[1] = baseaddr + SecFlashBSec2Off;
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info->start[2] = baseaddr + SecFlashBSec3Off;
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info->start[3] = baseaddr + SecFlashBSec4Off;
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info->size = 0x10000;
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info->sector_count = 4;
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break;
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}
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return (info->size);
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}
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unsigned long flash_init(void)
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{
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unsigned long size_b;
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int i;
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size_b = 0;
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for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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size_b = flash_get_size(CFG_FLASH_BASE, &flash_info[0], 0);
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if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b == 0) {
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printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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size_b, size_b >> 20);
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}
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/* flash_protect (int flag, ulong from, ulong to, flash_info_t *info) */
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(void)flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE,
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(flash_info[0].start[2] - 1), &flash_info[0]);
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#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
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(void)flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF,
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&flash_info[0]);
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#endif
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return (size_b);
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}
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void flash_print_info(flash_info_t * info)
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{
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int i;
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if (info->flash_id == FLASH_UNKNOWN) {
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printf("missing or unknown FLASH type\n");
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return;
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}
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switch (info->flash_id) {
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case (STM_ID_29W320EB & 0xFFFF):
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case (STM_ID_29W320DB & 0xFFFF):
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printf("ST Microelectronics ");
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break;
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default:
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printf("Unknown Vendor: (0x%08X) ", info->flash_id);
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break;
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}
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for (i = 0; i < info->sector_count; ++i) {
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if ((i % 5) == 0)
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printf("\n ");
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printf(" %08lX%s",
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info->start[i], info->protect[i] ? " (RO)" : " ");
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}
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printf("\n");
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return;
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}
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int flash_erase(flash_info_t * info, int s_first, int s_last)
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{
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int cnt = 0, i;
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int prot, sect;
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prot = 0;
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for (sect = s_first; sect <= s_last; ++sect) {
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if (info->protect[sect])
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prot++;
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}
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if (prot)
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printf("- Warning: %d protected sectors will not be erased!\n",
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prot);
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else
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printf("\n");
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cnt = s_last - s_first + 1;
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#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
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printf("Erasing Flash locations, Please Wait\n");
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for (i = s_first; i <= s_last; i++) {
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if (info->protect[i] == 0) { /* not protected */
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if (erase_block_flash(i) < 0) {
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printf("Error Sector erasing \n");
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return FLASH_FAIL;
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}
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}
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}
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#elif (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
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if (cnt == FLASH_TOT_SECT) {
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printf("Erasing flash, Please Wait \n");
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if (erase_flash() < 0) {
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printf("Erasing flash failed \n");
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return FLASH_FAIL;
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}
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} else {
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printf("Erasing Flash locations, Please Wait\n");
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for (i = s_first; i <= s_last; i++) {
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if (info->protect[i] == 0) { /* not protected */
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if (erase_block_flash(i) < 0) {
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printf("Error Sector erasing \n");
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return FLASH_FAIL;
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}
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}
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}
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}
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#endif
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printf("\n");
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return FLASH_SUCCESS;
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}
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int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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int d;
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if (addr % 2) {
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read_flash(addr - 1 - CFG_FLASH_BASE, &d);
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d = (int)((d & 0x00FF) | (*src++ << 8));
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write_data(addr - 1, 2, (uchar *) & d);
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write_data(addr + 1, cnt - 1, src);
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} else
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write_data(addr, cnt, src);
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return FLASH_SUCCESS;
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}
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int write_data(long lStart, long lCount, uchar * pnData)
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{
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long i = 0;
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unsigned long ulOffset = lStart - CFG_FLASH_BASE;
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int d;
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int nSector = 0;
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int flag = 0;
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if (lCount % 2) {
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flag = 1;
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lCount = lCount - 1;
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}
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for (i = 0; i < lCount - 1; i += 2, ulOffset += 2) {
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get_sector_number(ulOffset, &nSector);
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read_flash(ulOffset, &d);
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if (d != 0xffff) {
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printf
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("Flash not erased at offset 0x%x Please erase to reprogram \n",
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ulOffset);
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return FLASH_FAIL;
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}
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unlock_flash(ulOffset);
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d = (int)(pnData[i] | pnData[i + 1] << 8);
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write_flash(ulOffset, d);
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if (poll_toggle_bit(ulOffset) < 0) {
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printf("Error programming the flash \n");
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return FLASH_FAIL;
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}
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if ((i > 0) && (!(i % AFP_SectorSize2)))
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printf(".");
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}
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if (flag) {
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get_sector_number(ulOffset, &nSector);
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read_flash(ulOffset, &d);
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if (d != 0xffff) {
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printf
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("Flash not erased at offset 0x%x Please erase to reprogram \n",
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ulOffset);
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return FLASH_FAIL;
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}
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unlock_flash(ulOffset);
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d = (int)(pnData[i] | (d & 0xFF00));
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write_flash(ulOffset, d);
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if (poll_toggle_bit(ulOffset) < 0) {
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printf("Error programming the flash \n");
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return FLASH_FAIL;
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}
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}
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return FLASH_SUCCESS;
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}
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int write_flash(long nOffset, int nValue)
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{
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long addr;
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addr = (CFG_FLASH_BASE + nOffset);
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*(unsigned volatile short *)addr = nValue;
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sync();
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#if (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
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if (icache_status())
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udelay(CONFIG_CCLK_HZ / 1000000);
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#endif
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return FLASH_SUCCESS;
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}
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int read_flash(long nOffset, int *pnValue)
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{
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unsigned short *pFlashAddr =
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(unsigned short *)(CFG_FLASH_BASE + nOffset);
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*pnValue = *pFlashAddr;
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return TRUE;
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}
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int poll_toggle_bit(long lOffset)
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{
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unsigned int u1, u2;
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volatile unsigned long *FB =
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(volatile unsigned long *)(CFG_FLASH_BASE + lOffset);
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while (1) {
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u1 = *(volatile unsigned short *)FB;
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u2 = *(volatile unsigned short *)FB;
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u1 ^= u2;
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if (!(u1 & 0x0040))
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break;
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if (!(u2 & 0x0020))
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continue;
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else {
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u1 = *(volatile unsigned short *)FB;
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u2 = *(volatile unsigned short *)FB;
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u1 ^= u2;
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if (!(u1 & 0x0040))
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break;
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else {
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reset_flash();
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return FLASH_FAIL;
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}
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}
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}
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return FLASH_SUCCESS;
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}
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void reset_flash(void)
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{
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write_flash(WRITESEQ1, RESET_VAL);
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/* Wait for 10 micro seconds */
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udelay(10);
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}
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int erase_flash(void)
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{
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write_flash(WRITESEQ1, WRITEDATA1);
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write_flash(WRITESEQ2, WRITEDATA2);
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write_flash(WRITESEQ3, WRITEDATA3);
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write_flash(WRITESEQ4, WRITEDATA4);
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write_flash(WRITESEQ5, WRITEDATA5);
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write_flash(WRITESEQ6, WRITEDATA6);
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if (poll_toggle_bit(0x0000) < 0)
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return FLASH_FAIL;
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return FLASH_SUCCESS;
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}
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int erase_block_flash(int nBlock)
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{
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long ulSectorOff = 0x0;
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if ((nBlock < 0) || (nBlock > AFP_NumSectors))
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return FALSE;
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/* figure out the offset of the block in flash */
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if ((nBlock >= 0) && (nBlock < SecFlashABegin))
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ulSectorOff = nBlock * AFP_SectorSize1;
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else if ((nBlock >= SecFlashABegin) && (nBlock < NUM_SECTORS))
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ulSectorOff =
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SecFlashAOff + (nBlock - SecFlashABegin) * AFP_SectorSize2;
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/* no such sector */
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else
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return FLASH_FAIL;
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write_flash((WRITESEQ1 | ulSectorOff), WRITEDATA1);
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write_flash((WRITESEQ2 | ulSectorOff), WRITEDATA2);
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write_flash((WRITESEQ3 | ulSectorOff), WRITEDATA3);
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write_flash((WRITESEQ4 | ulSectorOff), WRITEDATA4);
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write_flash((WRITESEQ5 | ulSectorOff), WRITEDATA5);
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write_flash(ulSectorOff, BlockEraseVal);
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if (poll_toggle_bit(ulSectorOff) < 0)
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return FLASH_FAIL;
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printf(".");
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return FLASH_SUCCESS;
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}
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void unlock_flash(long ulOffset)
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{
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unsigned long ulOffsetAddr = ulOffset;
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ulOffsetAddr &= 0xFFFF0000;
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write_flash((WRITESEQ1 | ulOffsetAddr), UNLOCKDATA1);
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write_flash((WRITESEQ2 | ulOffsetAddr), UNLOCKDATA2);
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write_flash((WRITESEQ3 | ulOffsetAddr), UNLOCKDATA3);
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}
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int get_codes()
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{
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int dev_id = 0;
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write_flash(WRITESEQ1, GETCODEDATA1);
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write_flash(WRITESEQ2, GETCODEDATA2);
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write_flash(WRITESEQ3, GETCODEDATA3);
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read_flash(0x0402, &dev_id);
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dev_id &= 0x0000FFFF;
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reset_flash();
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return dev_id;
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}
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void get_sector_number(long ulOffset, int *pnSector)
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{
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int nSector = 0;
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long lMainEnd = 0x400000;
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long lBootEnd = 0x10000;
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/* sector numbers for the FLASH A boot sectors */
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if (ulOffset < lBootEnd) {
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nSector = (int)ulOffset / AFP_SectorSize1;
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}
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/* sector numbers for the FLASH B boot sectors */
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else if ((ulOffset >= lBootEnd) && (ulOffset < lMainEnd)) {
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nSector = ((ulOffset / (AFP_SectorSize2)) + 7);
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}
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/* if it is a valid sector, set it */
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if ((nSector >= 0) && (nSector < AFP_NumSectors))
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*pnSector = nSector;
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}
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