mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-27 15:12:21 +00:00
1072 lines
28 KiB
C
1072 lines
28 KiB
C
/*
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* (C) Copyright 2001
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* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
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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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/*
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* flash.c - flash support for the 512k, 8bit boot flash
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and the 8MB 32bit extra flash on the DB64360
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* most of this file was based on the existing U-Boot
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* flash drivers.
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*
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* written or collected and sometimes rewritten by
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* Ingo Assmus <ingo.assmus@keymile.com>
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*
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*/
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#include <common.h>
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#include <mpc8xx.h>
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#include "../include/mv_gen_reg.h"
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#include "../include/memory.h"
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#include "intel_flash.h"
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#define FLASH_ROM 0xFFFD /* unknown flash type */
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#define FLASH_RAM 0xFFFE /* unknown flash type */
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#define FLASH_MAN_UNKNOWN 0xFFFF0000
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/* #define DEBUG */
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/* Intel flash commands */
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int flash_erase_intel (flash_info_t * info, int s_first, int s_last);
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int write_word_intel (bank_addr_t addr, bank_word_t value);
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static ulong flash_get_size (int portwidth, vu_long * addr,
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flash_info_t * info);
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static int write_word (flash_info_t * info, ulong dest, ulong data);
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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 flash_init (void)
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{
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unsigned int i;
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unsigned long size_b0 = 0, size_b1 = 0;
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unsigned long base, flash_size;
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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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/* the boot flash */
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base = CONFIG_SYS_FLASH_BASE;
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size_b0 =
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flash_get_size (CONFIG_SYS_BOOT_FLASH_WIDTH, (vu_long *) base,
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&flash_info[0]);
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printf ("[%ldkB@%lx] ", size_b0 / 1024, base);
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if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b0, size_b0 << 20);
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}
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base = memoryGetDeviceBaseAddress (CONFIG_SYS_EXTRA_FLASH_DEVICE);
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/* base = memoryGetDeviceBaseAddress(DEV_CS3_BASE_ADDR);*/
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for (i = 1; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
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unsigned long size =
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flash_get_size (CONFIG_SYS_EXTRA_FLASH_WIDTH,
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(vu_long *) base, &flash_info[i]);
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printf ("[%ldMB@%lx] ", size >> 20, base);
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if (flash_info[i].flash_id == FLASH_UNKNOWN) {
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if (i == 1) {
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printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b1, size_b1 << 20);
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}
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break;
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}
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size_b1 += size;
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base += size;
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}
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flash_size = size_b0 + size_b1;
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return flash_size;
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}
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/*-----------------------------------------------------------------------
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*/
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static void flash_get_offsets (ulong base, flash_info_t * info)
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{
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int i;
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int sector_size;
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if (!info->sector_count)
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return;
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/* set up sector start address table */
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_AM040:
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case FLASH_28F128J3A:
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case FLASH_28F640J3A:
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case FLASH_RAM:
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/* this chip has uniformly spaced sectors */
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sector_size = info->size / info->sector_count;
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = base + (i * sector_size);
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break;
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default:
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if (info->flash_id & FLASH_BTYPE) {
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/* set sector offsets for bottom boot block type */
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info->start[0] = base + 0x00000000;
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info->start[1] = base + 0x00008000;
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info->start[2] = base + 0x0000C000;
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info->start[3] = base + 0x00010000;
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for (i = 4; i < info->sector_count; i++) {
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info->start[i] =
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base + (i * 0x00020000) - 0x00060000;
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}
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} else {
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/* set sector offsets for top boot block type */
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i = info->sector_count - 1;
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info->start[i--] = base + info->size - 0x00008000;
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info->start[i--] = base + info->size - 0x0000C000;
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info->start[i--] = base + info->size - 0x00010000;
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for (; i >= 0; i--) {
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info->start[i] = base + i * 0x00020000;
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}
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}
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}
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}
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/*-----------------------------------------------------------------------
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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 & FLASH_VENDMASK) {
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case FLASH_MAN_STM:
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printf ("STM ");
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break;
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case FLASH_MAN_AMD:
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printf ("AMD ");
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break;
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case FLASH_MAN_FUJ:
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printf ("FUJITSU ");
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break;
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case FLASH_MAN_INTEL:
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printf ("INTEL ");
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break;
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default:
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printf ("Unknown Vendor ");
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_AM040:
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printf ("AM29LV040B (4 Mbit, bottom boot sect)\n");
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break;
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case FLASH_AM400B:
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printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
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break;
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case FLASH_AM400T:
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printf ("AM29LV400T (4 Mbit, top boot sector)\n");
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break;
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case FLASH_AM800B:
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printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
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break;
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case FLASH_AM800T:
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printf ("AM29LV800T (8 Mbit, top boot sector)\n");
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break;
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case FLASH_AM160B:
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printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
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break;
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case FLASH_AM160T:
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printf ("AM29LV160T (16 Mbit, top boot sector)\n");
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break;
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case FLASH_AM320B:
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printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
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break;
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case FLASH_AM320T:
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printf ("AM29LV320T (32 Mbit, top boot sector)\n");
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break;
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case FLASH_28F640J3A:
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printf ("28F640J3A (64 Mbit)\n");
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break;
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case FLASH_28F128J3A:
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printf ("28F128J3A (128 Mbit)\n");
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break;
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case FLASH_ROM:
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printf ("ROM\n");
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break;
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case FLASH_RAM:
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printf ("RAM\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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break;
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}
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if ((info->size >> 20) > 0) {
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printf (" Size: %ld MB in %d Sectors\n",
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info->size >> 20, info->sector_count);
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} else {
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printf (" Size: %ld kB in %d Sectors\n",
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info->size >> 10, info->sector_count);
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}
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printf (" Sector Start Addresses:");
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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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/*-----------------------------------------------------------------------
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*/
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/*-----------------------------------------------------------------------
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*/
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/*
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* The following code cannot be run from FLASH!
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*/
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static inline void flash_cmd (int width, volatile unsigned char *addr,
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int offset, unsigned char cmd)
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{
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/* supports 1x8, 1x16, and 2x16 */
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/* 2x8 and 4x8 are not supported */
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if (width == 4) {
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/* assuming chips are in 16 bit mode */
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/* 2x16 */
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unsigned long cmd32 = (cmd << 16) | cmd;
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*(volatile unsigned long *) (addr + offset * 2) = cmd32;
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} else {
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/* 1x16 or 1x8 */
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*(volatile unsigned char *) (addr + offset) = cmd;
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}
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}
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static ulong
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flash_get_size (int portwidth, vu_long * addr, flash_info_t * info)
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{
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short i;
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volatile unsigned char *caddr = (unsigned char *) addr;
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volatile unsigned short *saddr = (unsigned short *) addr;
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volatile unsigned long *laddr = (unsigned long *) addr;
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char old[2], save;
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ulong id = 0, manu = 0, base = (ulong) addr;
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#ifdef DEBUG
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printf ("%s: enter\n", __FUNCTION__);
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#endif
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info->portwidth = portwidth;
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save = *caddr;
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flash_cmd (portwidth, caddr, 0, 0xf0);
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flash_cmd (portwidth, caddr, 0, 0xf0);
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udelay (10);
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old[0] = caddr[0];
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old[1] = caddr[1];
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if (old[0] != 0xf0) {
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flash_cmd (portwidth, caddr, 0, 0xf0);
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flash_cmd (portwidth, caddr, 0, 0xf0);
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udelay (10);
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if (*caddr == 0xf0) {
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/* this area is ROM */
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*caddr = save;
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info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
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info->sector_count = 8;
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info->size = 0x80000;
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flash_get_offsets (base, info);
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return info->size;
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}
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} else {
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*caddr = 0;
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udelay (10);
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if (*caddr == 0) {
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/* this area is RAM */
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*caddr = save;
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info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN;
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info->sector_count = 8;
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info->size = 0x80000;
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flash_get_offsets (base, info);
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return info->size;
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}
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flash_cmd (portwidth, caddr, 0, 0xf0);
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udelay (10);
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}
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/* Write auto select command: read Manufacturer ID */
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flash_cmd (portwidth, caddr, 0x555, 0xAA);
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flash_cmd (portwidth, caddr, 0x2AA, 0x55);
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flash_cmd (portwidth, caddr, 0x555, 0x90);
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udelay (10);
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if ((caddr[0] == old[0]) && (caddr[1] == old[1])) {
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/* this area is ROM */
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info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
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info->sector_count = 8;
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info->size = 0x80000;
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flash_get_offsets (base, info);
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return info->size;
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#ifdef DEBUG
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} else {
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printf ("%px%d: %02x:%02x -> %02x:%02x\n",
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caddr, portwidth, old[0], old[1], caddr[0], caddr[1]);
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#endif
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}
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switch (portwidth) {
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case 1:
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manu = caddr[0];
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manu |= manu << 16;
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id = caddr[1];
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break;
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case 2:
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manu = saddr[0];
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manu |= manu << 16;
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id = saddr[1];
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id |= id << 16;
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break;
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case 4:
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manu = laddr[0];
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id = laddr[1];
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break;
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}
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#ifdef DEBUG
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flash_cmd (portwidth, caddr, 0, 0xf0);
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printf ("\n%08lx:%08lx:%08lx\n", base, manu, id);
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printf ("%08lx %08lx %08lx %08lx\n",
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laddr[0], laddr[1], laddr[2], laddr[3]);
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#endif
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switch (manu) {
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case STM_MANUFACT:
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info->flash_id = FLASH_MAN_STM;
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break;
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case AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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break;
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case FUJ_MANUFACT:
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info->flash_id = FLASH_MAN_FUJ;
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break;
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case INTEL_MANUFACT:
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info->flash_id = FLASH_MAN_INTEL;
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break;
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default:
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flash_cmd (portwidth, caddr, 0, 0xf0);
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printf ("Unknown Mfr [%08lx]:%08lx\n", manu, id);
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info->flash_id = FLASH_UNKNOWN;
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info->sector_count = 0;
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info->size = 0;
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return (0); /* no or unknown flash */
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}
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switch (id) {
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case AMD_ID_LV400T:
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info->flash_id += FLASH_AM400T;
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info->sector_count = 11;
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info->size = 0x00100000;
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info->chipwidth = 1;
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break; /* => 1 MB */
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case AMD_ID_LV400B:
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info->flash_id += FLASH_AM400B;
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info->sector_count = 11;
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info->size = 0x00100000;
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info->chipwidth = 1;
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break; /* => 1 MB */
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case AMD_ID_LV800T:
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info->flash_id += FLASH_AM800T;
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info->sector_count = 19;
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info->size = 0x00200000;
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info->chipwidth = 1;
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break; /* => 2 MB */
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case AMD_ID_LV800B:
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info->flash_id += FLASH_AM800B;
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info->sector_count = 19;
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info->size = 0x00200000;
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info->chipwidth = 1;
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break; /* => 2 MB */
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case AMD_ID_LV160T:
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info->flash_id += FLASH_AM160T;
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info->sector_count = 35;
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info->size = 0x00400000;
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info->chipwidth = 1;
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break; /* => 4 MB */
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case AMD_ID_LV160B:
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info->flash_id += FLASH_AM160B;
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info->sector_count = 35;
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info->size = 0x00400000;
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info->chipwidth = 1;
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break; /* => 4 MB */
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#if 0 /* enable when device IDs are available */
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case AMD_ID_LV320T:
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info->flash_id += FLASH_AM320T;
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info->sector_count = 67;
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info->size = 0x00800000;
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break; /* => 8 MB */
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case AMD_ID_LV320B:
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info->flash_id += FLASH_AM320B;
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info->sector_count = 67;
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info->size = 0x00800000;
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break; /* => 8 MB */
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#endif
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case AMD_ID_LV040B:
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info->flash_id += FLASH_AM040;
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info->sector_count = 8;
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info->size = 0x80000;
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info->chipwidth = 1;
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break; /* => 512 kB */
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case INTEL_ID_28F640J3A:
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info->flash_id += FLASH_28F640J3A;
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info->sector_count = 64;
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info->size = 128 * 1024 * 64; /* 128kbytes x 64 blocks */
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info->chipwidth = 2;
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if (portwidth == 4)
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info->size *= 2; /* 2x16 */
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break;
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case INTEL_ID_28F128J3A:
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info->flash_id += FLASH_28F128J3A;
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info->sector_count = 128;
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info->size = 128 * 1024 * 128; /* 128kbytes x 128 blocks */
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info->chipwidth = 2;
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if (portwidth == 4)
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info->size *= 2; /* 2x16 */
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break;
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default:
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flash_cmd (portwidth, caddr, 0, 0xf0);
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printf ("Unknown id %lx:[%lx]\n", manu, id);
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info->flash_id = FLASH_UNKNOWN;
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info->chipwidth = 1;
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return (0); /* => no or unknown flash */
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}
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|
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flash_get_offsets (base, info);
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|
|
|
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/* check for protected sectors */
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for (i = 0; i < info->sector_count; i++) {
|
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/* read sector protection at sector address, (A7 .. A0)=0x02 */
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/* D0 = 1 if protected */
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caddr = (volatile unsigned char *) (info->start[i]);
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saddr = (volatile unsigned short *) (info->start[i]);
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laddr = (volatile unsigned long *) (info->start[i]);
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if (portwidth == 1)
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info->protect[i] = caddr[2] & 1;
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else if (portwidth == 2)
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info->protect[i] = saddr[2] & 1;
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else
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info->protect[i] = laddr[2] & 1;
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}
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|
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/*
|
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* Prevent writes to uninitialized FLASH.
|
|
*/
|
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if (info->flash_id != FLASH_UNKNOWN) {
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caddr = (volatile unsigned char *) info->start[0];
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|
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flash_cmd (portwidth, caddr, 0, 0xF0); /* reset bank */
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}
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|
|
|
return (info->size);
|
|
}
|
|
|
|
int flash_erase (flash_info_t * info, int s_first, int s_last)
|
|
{
|
|
volatile unsigned char *addr = (uchar *) (info->start[0]);
|
|
int flag, prot, sect, l_sect;
|
|
ulong start, now, last;
|
|
|
|
/* modified to support 2x16 Intel flash */
|
|
/* Note that the code will not exit on a flash erasure error or timeout */
|
|
/* but will print and error message and continue processing sectors */
|
|
/* until they are all erased. */
|
|
/* 10-16-2002 P. Marchese */
|
|
ulong mask;
|
|
int timeout;
|
|
|
|
if (info->portwidth == 4)
|
|
/* {
|
|
printf ("- Warning: erasing of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
|
|
return 1;
|
|
}*/
|
|
{
|
|
/* make sure it's Intel flash */
|
|
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
|
|
/* yup! it's an Intel flash */
|
|
/* is it 16-bits wide? */
|
|
if (info->chipwidth == 2) {
|
|
/* yup! it's 16-bits wide */
|
|
/* are there any sectors to process? */
|
|
if ((s_first < 0) || (s_first > s_last)) {
|
|
printf ("Error: There are no sectors to erase\n");
|
|
printf ("Either sector %d is less than zero\n", s_first);
|
|
printf ("or sector %d is greater than sector %d\n", s_first, s_last);
|
|
return 1;
|
|
}
|
|
/* check for protected sectors */
|
|
prot = 0;
|
|
for (sect = s_first; sect <= s_last; ++sect)
|
|
if (info->protect[sect])
|
|
prot++;
|
|
/* if variable "prot" is nonzero, there are protected sectors */
|
|
if (prot)
|
|
printf ("- Warning: %d protected sectors will not be erased!\n", prot);
|
|
/* reset the flash */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RST);
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts ();
|
|
/* Clear the status register */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_CLR_STAT);
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RST);
|
|
/* Start erase on unprotected sectors */
|
|
for (sect = s_first; sect <= s_last; sect++) {
|
|
/* is the sector unprotected? */
|
|
if (info->protect[sect] == 0) { /* not protected */
|
|
/* issue the single block erase command, 0x20 */
|
|
flash_cmd (info->portwidth,
|
|
(volatile unsigned
|
|
char *) info->
|
|
start[sect], 0,
|
|
CHIP_CMD_ERASE1);
|
|
/* issue the erase confirm command, 0xD0 */
|
|
flash_cmd (info->portwidth,
|
|
(volatile unsigned
|
|
char *) info->
|
|
start[sect], 0,
|
|
CHIP_CMD_ERASE2);
|
|
l_sect = sect;
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
/* poll for erasure completion */
|
|
/* put flash into read status mode by writing 0x70 to it */
|
|
flash_cmd (info->portwidth,
|
|
addr, 0,
|
|
CHIP_CMD_RD_STAT);
|
|
/* setup the status register mask */
|
|
mask = CHIP_STAT_RDY |
|
|
(CHIP_STAT_RDY << 16);
|
|
/* init. the timeout counter */
|
|
start = get_timer (0);
|
|
/* keep looping while the flash is not ready */
|
|
/* exit the loop by timing out or the flash */
|
|
/* becomes ready again */
|
|
timeout = 0;
|
|
while ((*
|
|
(volatile unsigned
|
|
long *) info->
|
|
start[sect] & mask) !=
|
|
mask) {
|
|
/* has the timeout limit been reached? */
|
|
if (get_timer (start)
|
|
>
|
|
CONFIG_SYS_FLASH_ERASE_TOUT)
|
|
{
|
|
/* timeout limit reached */
|
|
printf ("Time out limit reached erasing sector at address %08lx\n", info->start[sect]);
|
|
printf ("Continuing with next sector\n");
|
|
timeout = 1;
|
|
goto timed_out_error;
|
|
}
|
|
/* put flash into read status mode by writing 0x70 to it */
|
|
flash_cmd (info->
|
|
portwidth,
|
|
addr, 0,
|
|
CHIP_CMD_RD_STAT);
|
|
}
|
|
/* did we timeout? */
|
|
timed_out_error:if (timeout == 0)
|
|
{
|
|
/* didn't timeout, so check the status register */
|
|
/* create the status mask to check for errors */
|
|
mask = CHIP_STAT_ECLBS;
|
|
mask = mask | (mask <<
|
|
16);
|
|
/* put flash into read status mode by writing 0x70 to it */
|
|
flash_cmd (info->
|
|
portwidth,
|
|
addr, 0,
|
|
CHIP_CMD_RD_STAT);
|
|
/* are there any errors? */
|
|
if ((*
|
|
(volatile
|
|
unsigned long *)
|
|
info->
|
|
start[sect] &
|
|
mask) != 0) {
|
|
/* We got an erasure error */
|
|
printf ("Flash erasure error at address 0x%08lx\n", info->start[sect]);
|
|
printf ("Continuing with next sector\n");
|
|
/* reset the flash */
|
|
flash_cmd
|
|
(info->
|
|
portwidth,
|
|
addr,
|
|
0,
|
|
CHIP_CMD_RST);
|
|
}
|
|
}
|
|
/* erasure completed without errors */
|
|
/* reset the flash */
|
|
flash_cmd (info->portwidth,
|
|
addr, 0,
|
|
CHIP_CMD_RST);
|
|
} /* end if not protected */
|
|
} /* end for loop */
|
|
printf ("Flash erasure done\n");
|
|
return 0;
|
|
} else {
|
|
/* The Intel flash is not 16-bit wide */
|
|
/* print and error message and return */
|
|
/* NOTE: you can add routines here to handle other size flash */
|
|
printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
|
|
printf ("The erasure code only handles Intel 16-bit wide flash memory\n");
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* Not Intel flash so return an error as a write timeout */
|
|
/* NOTE: if it's another type flash, stick its routine here */
|
|
printf ("Error: The flash device is not Intel type\n");
|
|
printf ("The erasure code only supports Intel flash in a 32-bit port width\n");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* end 32-bit wide flash code */
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
|
|
return 1; /* Rom can not be erased */
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { /* RAM just copy 0s to RAM */
|
|
for (sect = s_first; sect <= s_last; sect++) {
|
|
int sector_size = info->size / info->sector_count;
|
|
|
|
addr = (uchar *) (info->start[sect]);
|
|
memset ((void *) addr, 0, sector_size);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if ((s_first < 0) || (s_first > s_last)) {
|
|
if (info->flash_id == FLASH_UNKNOWN) {
|
|
printf ("- missing\n");
|
|
} else {
|
|
printf ("- no sectors to erase\n");
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { /* Intel works spezial */
|
|
return flash_erase_intel (info,
|
|
(unsigned short) s_first,
|
|
(unsigned short) s_last);
|
|
}
|
|
#if 0
|
|
if ((info->flash_id == FLASH_UNKNOWN) || /* Flash is unknown to PPCBoot */
|
|
(info->flash_id > FLASH_AMD_COMP)) {
|
|
printf ("Can't erase unknown flash type %08lx - aborted\n",
|
|
info->flash_id);
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
prot = 0;
|
|
for (sect = s_first; sect <= s_last; ++sect) {
|
|
if (info->protect[sect]) {
|
|
prot++;
|
|
}
|
|
}
|
|
|
|
if (prot) {
|
|
printf ("- Warning: %d protected sectors will not be erased!\n", prot);
|
|
} else {
|
|
printf ("\n");
|
|
}
|
|
|
|
l_sect = -1;
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts ();
|
|
|
|
flash_cmd (info->portwidth, addr, 0x555, 0xAA); /* start erase routine */
|
|
flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
|
|
flash_cmd (info->portwidth, addr, 0x555, 0x80);
|
|
flash_cmd (info->portwidth, addr, 0x555, 0xAA);
|
|
flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
|
|
|
|
/* Start erase on unprotected sectors */
|
|
for (sect = s_first; sect <= s_last; sect++) {
|
|
if (info->protect[sect] == 0) { /* not protected */
|
|
addr = (uchar *) (info->start[sect]);
|
|
flash_cmd (info->portwidth, addr, 0, 0x30);
|
|
l_sect = sect;
|
|
}
|
|
}
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
|
|
/* wait at least 80us - let's wait 1 ms */
|
|
udelay (1000);
|
|
|
|
/*
|
|
* We wait for the last triggered sector
|
|
*/
|
|
if (l_sect < 0)
|
|
goto DONE;
|
|
|
|
start = get_timer (0);
|
|
last = start;
|
|
addr = (volatile unsigned char *) (info->start[l_sect]);
|
|
/* broken for 2x16: TODO */
|
|
while ((addr[0] & 0x80) != 0x80) {
|
|
if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
|
|
printf ("Timeout\n");
|
|
return 1;
|
|
}
|
|
/* show that we're waiting */
|
|
if ((now - last) > 1000) { /* every second */
|
|
putc ('.');
|
|
last = now;
|
|
}
|
|
}
|
|
|
|
DONE:
|
|
/* reset to read mode */
|
|
addr = (volatile unsigned char *) info->start[0];
|
|
flash_cmd (info->portwidth, addr, 0, 0xf0);
|
|
flash_cmd (info->portwidth, addr, 0, 0xf0);
|
|
|
|
printf (" done\n");
|
|
return 0;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Copy memory to flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
|
|
/* broken for 2x16: TODO */
|
|
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
|
|
{
|
|
ulong cp, wp, data;
|
|
int i, l, rc;
|
|
|
|
/* Commented out since the below code should work for 32-bit(2x 16 flash) */
|
|
/* 10-16-2002 P. Marchese */
|
|
/* if(info->portwidth==4) return 1; */
|
|
/* if(info->portwidth==4) {
|
|
printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
|
|
return 1;
|
|
}*/
|
|
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
|
|
return 0;
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
|
|
memcpy ((void *) addr, src, cnt);
|
|
return 0;
|
|
}
|
|
|
|
wp = (addr & ~3); /* get lower word aligned address */
|
|
|
|
/*
|
|
* handle unaligned start bytes
|
|
*/
|
|
if ((l = addr - wp) != 0) {
|
|
data = 0;
|
|
for (i = 0, cp = wp; i < l; ++i, ++cp) {
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
}
|
|
for (; i < 4 && cnt > 0; ++i) {
|
|
data = (data << 8) | *src++;
|
|
--cnt;
|
|
++cp;
|
|
}
|
|
for (; cnt == 0 && i < 4; ++i, ++cp) {
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
}
|
|
|
|
if ((rc = write_word (info, wp, data)) != 0) {
|
|
return (rc);
|
|
}
|
|
wp += 4;
|
|
}
|
|
|
|
/*
|
|
* handle word aligned part
|
|
*/
|
|
while (cnt >= 4) {
|
|
data = 0;
|
|
for (i = 0; i < 4; ++i) {
|
|
data = (data << 8) | *src++;
|
|
}
|
|
if ((rc = write_word (info, wp, data)) != 0) {
|
|
return (rc);
|
|
}
|
|
wp += 4;
|
|
cnt -= 4;
|
|
}
|
|
|
|
if (cnt == 0) {
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* handle unaligned tail bytes
|
|
*/
|
|
data = 0;
|
|
for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
|
|
data = (data << 8) | *src++;
|
|
--cnt;
|
|
}
|
|
for (; i < 4; ++i, ++cp) {
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
}
|
|
|
|
return (write_word (info, wp, data));
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Write a word to Flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
/* broken for 2x16: TODO */
|
|
static int write_word (flash_info_t * info, ulong dest, ulong data)
|
|
{
|
|
volatile unsigned char *addr = (uchar *) (info->start[0]);
|
|
ulong start;
|
|
int flag, i;
|
|
ulong mask;
|
|
|
|
/* modified so that it handles 32-bit(2x16 Intel flash programming */
|
|
/* 10-16-2002 P. Marchese */
|
|
|
|
if (info->portwidth == 4)
|
|
/* {
|
|
printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
|
|
return 1;
|
|
}*/
|
|
{
|
|
/* make sure it's Intel flash */
|
|
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
|
|
/* yup! it's an Intel flash */
|
|
/* is it 16-bits wide? */
|
|
if (info->chipwidth == 2) {
|
|
/* yup! it's 16-bits wide */
|
|
/* so we know how to program it */
|
|
/* reset the flash */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RST);
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts ();
|
|
/* Clear the status register */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_CLR_STAT);
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RST);
|
|
/* 1st cycle of word/byte program */
|
|
/* write 0x40 to the location to program */
|
|
flash_cmd (info->portwidth, (uchar *) dest, 0,
|
|
CHIP_CMD_PROG);
|
|
/* 2nd cycle of word/byte program */
|
|
/* write the data to the destination address */
|
|
*(ulong *) dest = data;
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
/* setup the status register mask */
|
|
mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16);
|
|
/* put flash into read status mode by writing 0x70 to it */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RD_STAT);
|
|
/* init. the timeout counter */
|
|
start = get_timer (0);
|
|
/* keep looping while the flash is not ready */
|
|
/* exit the loop by timing out or the flash */
|
|
/* becomes ready again */
|
|
/* 11-13-2002 Paul Marchese */
|
|
/* modified while loop conditional statement */
|
|
/* because we were always timing out. */
|
|
/* there is a type mismatch, "addr[0]" */
|
|
/* returns a byte but "mask" is a 32-bit value */
|
|
while ((*(volatile unsigned long *) info->
|
|
start[0] & mask) != mask)
|
|
/* original code */
|
|
/* while (addr[0] & mask) != mask) */
|
|
{
|
|
/* has the timeout limit been reached? */
|
|
if (get_timer (start) >
|
|
CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
/* timeout limit reached */
|
|
printf ("Time out limit reached programming address %08lx with data %08lx\n", dest, data);
|
|
/* reset the flash */
|
|
flash_cmd (info->portwidth,
|
|
addr, 0,
|
|
CHIP_CMD_RST);
|
|
return (1);
|
|
}
|
|
/* put flash into read status mode by writing 0x70 to it */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RD_STAT);
|
|
}
|
|
/* flash is ready, so check the status */
|
|
/* create the status mask to check for errors */
|
|
mask = CHIP_STAT_DPS | CHIP_STAT_VPPS |
|
|
CHIP_STAT_PSLBS;
|
|
mask = mask | (mask << 16);
|
|
/* put flash into read status mode by writing 0x70 to it */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RD_STAT);
|
|
/* are there any errors? */
|
|
if ((addr[0] & mask) != 0) {
|
|
/* We got a one of the following errors: */
|
|
/* Voltage range, Device protect, or programming */
|
|
/* return the error as a device timeout */
|
|
/* put flash into read status mode by writing 0x70 to it */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RD_STAT);
|
|
printf ("Flash programming error at address 0x%08lx\n", dest);
|
|
printf ("Flash status register contains 0x%08lx\n", (unsigned long) addr[0]);
|
|
/* reset the flash */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RST);
|
|
return 1;
|
|
}
|
|
/* write completed without errors */
|
|
/* reset the flash */
|
|
flash_cmd (info->portwidth, addr, 0,
|
|
CHIP_CMD_RST);
|
|
return 0;
|
|
} else {
|
|
/* it's not 16-bits wide, so return an error as a write timeout */
|
|
/* NOTE: you can add routines here to handle other size flash */
|
|
printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
|
|
printf ("The write code only handles Intel 16-bit wide flash memory\n");
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* not Intel flash so return an error as a write timeout */
|
|
/* NOTE: if it's another type flash, stick its routine here */
|
|
printf ("Error: The flash device is not Intel type\n");
|
|
printf ("The code only supports Intel flash in a 32-bit port width\n");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* end of 32-bit flash code */
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
|
|
return 1;
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
|
|
*(unsigned long *) dest = data;
|
|
return 0;
|
|
}
|
|
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
|
|
unsigned short low = data & 0xffff;
|
|
unsigned short hi = (data >> 16) & 0xffff;
|
|
int ret = write_word_intel ((bank_addr_t) dest, hi);
|
|
|
|
if (!ret)
|
|
ret = write_word_intel ((bank_addr_t) (dest + 2),
|
|
low);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*((vu_long *) dest) & data) != data) {
|
|
return (2);
|
|
}
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts ();
|
|
|
|
/* first, perform an unlock bypass command to speed up flash writes */
|
|
addr[0x555] = 0xAA;
|
|
addr[0x2AA] = 0x55;
|
|
addr[0x555] = 0x20;
|
|
|
|
/* write each byte out */
|
|
for (i = 0; i < 4; i++) {
|
|
char *data_ch = (char *) &data;
|
|
|
|
addr[0] = 0xA0;
|
|
*(((char *) dest) + i) = data_ch[i];
|
|
udelay (10); /* XXX */
|
|
}
|
|
|
|
/* we're done, now do an unlock bypass reset */
|
|
addr[0] = 0x90;
|
|
addr[0] = 0x00;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer (0);
|
|
while ((*((vu_long *) dest) & 0x00800080) != (data & 0x00800080)) {
|
|
if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|