upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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805 lines
20 KiB
805 lines
20 KiB
/*
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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 on the GEVB
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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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#include <common.h>
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#include <mpc8xx.h>
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#include <galileo/gt64260R.h>
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#include <galileo/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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/* #define FLASH_ID_OVERRIDE */ /* Hack to set type to 040B if ROM emulator is installed.
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* Can be used to program a ROM in circuit if a programmer
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* is not available by swapping the rom out. */
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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[CFG_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, 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
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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<CFG_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 = CFG_FLASH_BASE;
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size_b0 = flash_get_size(1, (vu_long *)base, &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",
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base, size_b0, size_b0<<20);
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}
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base = memoryGetDeviceBaseAddress(CFG_EXTRA_FLASH_DEVICE);
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for(i=1;i<CFG_MAX_FLASH_BANKS;i++) {
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unsigned long size = flash_get_size(CFG_EXTRA_FLASH_WIDTH, (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",
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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
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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) 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] = 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
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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_AMD: printf ("AMD "); break;
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case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
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case FLASH_MAN_INTEL: printf ("INTEL "); break;
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default: printf ("Unknown Vendor "); 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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puts (" Size: ");
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print_size (info->size, "");
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printf (" in %d Sectors\n", info->sector_count);
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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],
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info->protect[i] ? " (RO)" : " "
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);
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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, 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, manu, base = (ulong)addr;
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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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#ifndef FLASH_ID_OVERRIDE
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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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#else
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info->flash_id = FLASH_MAN_AMD + 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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#endif
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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]) &&
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(caddr[1] == old[1])) {
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/* this area is ROM */
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#ifndef FLASH_ID_OVERRIDE
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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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#else
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info->flash_id = FLASH_MAN_AMD + 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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#endif
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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],
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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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default:
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id = manu = -1;
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break;
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}
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#ifdef DEBUG
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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 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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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;
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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) 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) info->size*=2; /* 2x16 */
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break;
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default:
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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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flash_get_offsets(base, info);
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#if 0
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/* set up sector start address table */
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if (info->flash_id & FLASH_AM040) {
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/* this chip has uniformly spaced sectors */
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = base + (i * 0x00010000);
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} else 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] = 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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|
#endif
|
|
|
|
/* check for protected sectors */
|
|
for (i = 0; i < info->sector_count; i++) {
|
|
/* read sector protection at sector address, (A7 .. A0)=0x02 */
|
|
/* D0 = 1 if protected */
|
|
caddr = (volatile unsigned char *)(info->start[i]);
|
|
saddr = (volatile unsigned short *)(info->start[i]);
|
|
laddr = (volatile unsigned long *)(info->start[i]);
|
|
if(portwidth==1)
|
|
info->protect[i] = caddr[2] & 1;
|
|
else if(portwidth==2)
|
|
info->protect[i] = saddr[2] & 1;
|
|
else
|
|
info->protect[i] = laddr[2] & 1;
|
|
}
|
|
|
|
/*
|
|
* Prevent writes to uninitialized FLASH.
|
|
*/
|
|
if (info->flash_id != FLASH_UNKNOWN) {
|
|
caddr = (volatile unsigned char *)info->start[0];
|
|
|
|
flash_cmd(portwidth,caddr,0,0xF0); /* reset bank */
|
|
}
|
|
|
|
return (info->size);
|
|
}
|
|
|
|
/* TODO: 2x16 unsupported */
|
|
int
|
|
flash_erase (flash_info_t *info, int s_first, int s_last)
|
|
{
|
|
volatile unsigned char *addr = (char *)(info->start[0]);
|
|
int flag, prot, sect, l_sect;
|
|
ulong start, now, last;
|
|
|
|
/* TODO: 2x16 unsupported */
|
|
if(info->portwidth==4) return 1;
|
|
|
|
if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1;
|
|
if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
|
|
for (sect = s_first; sect<=s_last; sect++) {
|
|
int sector_size=info->size/info->sector_count;
|
|
addr = (char *)(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) {
|
|
return flash_erase_intel(info,
|
|
(unsigned short)s_first,
|
|
(unsigned short)s_last);
|
|
}
|
|
|
|
#if 0
|
|
if ((info->flash_id == FLASH_UNKNOWN) ||
|
|
(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);
|
|
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 = (char *)(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)) > CFG_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;
|
|
|
|
if(info->portwidth==4) 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 = (char *)(info->start[0]);
|
|
ulong start;
|
|
int flag, i;
|
|
|
|
if(info->portwidth==4) return 1;
|
|
|
|
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) > CFG_FLASH_WRITE_TOUT) {
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|