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412 lines
11 KiB
C
412 lines
11 KiB
C
/*
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* (C) Copyright 2001, 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2002
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* Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
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*
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* Flash Routines for AMD device AM29DL323DB on the EP8260 board.
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*
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* This file is based on board/tqm8260/flash.c.
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*--------------------------------------------------------------------
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <mpc8xx.h>
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#define V_ULONG(a) (*(volatile unsigned long *)( a ))
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#define V_BYTE(a) (*(volatile unsigned char *)( a ))
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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/*-----------------------------------------------------------------------
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*/
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void flash_reset(void)
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{
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if( flash_info[0].flash_id != FLASH_UNKNOWN ) {
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V_ULONG( flash_info[0].start[0] ) = 0x00F000F0;
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V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0;
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}
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}
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/*-----------------------------------------------------------------------
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*/
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ulong flash_get_size( ulong baseaddr, flash_info_t *info )
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{
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short i;
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unsigned long flashtest_h, flashtest_l;
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/* Write auto select command sequence and test FLASH answer */
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V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA;
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V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055;
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V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090;
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V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA;
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V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055;
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V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090;
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flashtest_h = V_ULONG(baseaddr); /* manufacturer ID */
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flashtest_l = V_ULONG(baseaddr + 4);
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if ((int)flashtest_h == AMD_MANUFACT) {
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info->flash_id = FLASH_MAN_AMD;
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} else {
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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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flashtest_h = V_ULONG(baseaddr + 8); /* device ID */
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flashtest_l = V_ULONG(baseaddr + 12);
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if (flashtest_h != flashtest_l) {
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info->flash_id = FLASH_UNKNOWN;
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return(0);
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}
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switch((int)flashtest_h) {
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case AMD_ID_DL323B:
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info->flash_id += FLASH_AMDL323B;
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info->sector_count = 71;
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info->size = 0x01000000; /* 4 * 4 MB = 16 MB */
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break;
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case AMD_ID_LV640U: /* AMDLV640 and AMDLV641 have same ID */
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info->flash_id += FLASH_AMLV640U;
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info->sector_count = 128;
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info->size = 0x02000000; /* 4 * 8 MB = 32 MB */
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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return(0); /* no or unknown flash */
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}
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if(flashtest_h == AMD_ID_LV640U) {
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/* set up sector start adress table (uniform sector type) */
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = baseaddr + (i * 0x00040000);
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} else {
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/* set up sector start adress table (bottom sector type) */
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for (i = 0; i < 8; i++) {
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info->start[i] = baseaddr + (i * 0x00008000);
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}
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for (i = 8; i < info->sector_count; i++) {
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info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000;
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}
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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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if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) ||
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(V_ULONG( info->start[i] + 20 ) & 0x00010001)) {
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info->protect[i] = 1; /* D0 = 1 if protected */
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} else {
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info->protect[i] = 0;
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}
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}
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flash_reset();
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return(info->size);
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}
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/*-----------------------------------------------------------------------
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*/
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unsigned long flash_init (void)
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{
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unsigned long size_b0 = 0;
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int i;
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/* Init: no FLASHes known */
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for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/* Static FLASH Bank configuration here (only one bank) */
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size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
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printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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size_b0, size_b0>>20);
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}
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/*
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* protect monitor and environment sectors
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*/
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#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
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&flash_info[0]);
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#endif
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#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
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&flash_info[0]);
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#endif
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return (size_b0);
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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 >> 16) & 0xff) {
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case FLASH_MAN_AMD: printf ("AMD "); 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_AMDL323B: printf ("29DL323B (32 M, bottom sector)\n");
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break;
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case FLASH_AMLV640U: printf ("29LV640U (64 M, uniform sector)\n");
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break;
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default: printf ("Unknown Chip Type\n");
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break;
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}
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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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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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int flash_erase (flash_info_t *info, int s_first, int s_last)
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{
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int flag, prot, sect, l_sect;
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ulong start, now, last;
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if ((s_first < 0) || (s_first > s_last)) {
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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("- missing\n");
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} else {
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printf ("- no sectors to erase\n");
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}
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return 1;
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}
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prot = 0;
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for (sect = s_first; sect <= s_last; sect++) {
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if (info->protect[sect])
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prot++;
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}
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if (prot) {
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printf ("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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printf ("\n");
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}
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l_sect = -1;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
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V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
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V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080;
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V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
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V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
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V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
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V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
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V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080;
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V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
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V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
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udelay (1000);
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect<=s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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V_ULONG( info->start[sect] ) = 0x00300030;
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V_ULONG( info->start[sect] + 4 ) = 0x00300030;
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l_sect = sect;
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}
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}
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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/* wait at least 80us - let's wait 1 ms */
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udelay (1000);
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/*
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* We wait for the last triggered sector
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*/
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if (l_sect < 0)
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goto DONE;
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start = get_timer (0);
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last = start;
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while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 ||
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(V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080)
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{
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if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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return 1;
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}
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/* show that we're waiting */
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if ((now - last) > 1000) { /* every second */
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serial_putc ('.');
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last = now;
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}
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}
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DONE:
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/* reset to read mode */
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flash_reset ();
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printf (" done\n");
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return 0;
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}
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static int write_dword (flash_info_t *, ulong, unsigned char *);
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/*-----------------------------------------------------------------------
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* Copy memory to flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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*/
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int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
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{
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ulong dp;
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static unsigned char bb[8];
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int i, l, rc, cc = cnt;
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dp = (addr & ~7); /* get lower dword aligned address */
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/*
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* handle unaligned start bytes
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*/
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if ((l = addr - dp) != 0) {
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for (i = 0; i < 8; i++)
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bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++;
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if ((rc = write_dword(info, dp, bb)) != 0)
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{
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return (rc);
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}
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dp += 8;
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cc -= 8 - l;
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}
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/*
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* handle word aligned part
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*/
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while (cc >= 8) {
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if ((rc = write_dword(info, dp, src)) != 0) {
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return (rc);
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}
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dp += 8;
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src += 8;
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cc -= 8;
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}
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if (cc <= 0) {
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return (0);
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}
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/*
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* handle unaligned tail bytes
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*/
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for (i = 0; i < 8; i++) {
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bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i);
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}
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return (write_dword(info, dp, bb));
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}
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/*-----------------------------------------------------------------------
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* Write a dword to Flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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*/
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static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata)
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{
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ulong start;
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ulong cl = 0, ch =0;
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int flag, i;
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for (ch=0, i=0; i < 4; i++)
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ch = (ch << 8) + *pdata++; /* high word */
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for (cl=0, i=0; i < 4; i++)
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cl = (cl << 8) + *pdata++; /* low word */
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/* Check if Flash is (sufficiently) erased */
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if ((*((vu_long *)dest) & ch) != ch
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||(*((vu_long *)(dest + 4)) & cl) != cl)
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{
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return (2);
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}
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
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V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
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V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0;
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V_ULONG( dest ) = ch;
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V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
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V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
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V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
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V_ULONG( dest + 4 ) = cl;
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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/* data polling for D7 */
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start = get_timer (0);
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while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) ||
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((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) {
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if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
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return (1);
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}
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}
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return (0);
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}
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