435 lines
10 KiB
C
435 lines
10 KiB
C
/*
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* (C) Copyright 2000
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* Marius Groeger <mgroeger@sysgo.de>
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Flash Routines for AMD 29F080B devices
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* Added support for 64bit and AMD 29DL323B
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*
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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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#include <asm/io.h>
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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#define RD_SWP32(x) in_le32((volatile u32*)x)
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static ulong flash_get_size (vu_long *addr, flash_info_t *info);
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static int write_word (flash_info_t *info, ulong dest, ulong data);
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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;
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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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/* for now, only support the 4 MB Flash SIMM */
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size = flash_get_size((vu_long *)CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
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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*/ (CONFIG_SYS_FLASH0_SIZE * 1024 * 1024);
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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 (AMD_MANUFACT & FLASH_VENDMASK):
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printf ("AMD ");
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break;
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case (FUJ_MANUFACT & FLASH_VENDMASK):
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printf ("FUJITSU ");
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break;
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case (SST_MANUFACT & FLASH_VENDMASK):
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printf ("SST ");
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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 (AMD_ID_DL323B & FLASH_TYPEMASK):
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printf("AM29DL323B (32 MBit)\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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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) 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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* The following code cannot be run from FLASH!
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*/
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static ulong flash_get_size (vu_long *addr, flash_info_t *info)
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{
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short i;
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vu_long vendor[2], devid[2];
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ulong base = (ulong)addr;
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/* Reset and Write auto select command: read Manufacturer ID */
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addr[0] = 0xf0f0f0f0;
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addr[2 * 0x0555] = 0xAAAAAAAA;
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addr[2 * 0x02AA] = 0x55555555;
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addr[2 * 0x0555] = 0x90909090;
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addr[1] = 0xf0f0f0f0;
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addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
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addr[2 * 0x02AA + 1] = 0x55555555;
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addr[2 * 0x0555 + 1] = 0x90909090;
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udelay (1000);
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vendor[0] = RD_SWP32(&addr[0]);
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vendor[1] = RD_SWP32(&addr[1]);
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if (vendor[0] != vendor[1] || vendor[0] != AMD_MANUFACT) {
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info->size = 0;
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goto out;
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}
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devid[0] = RD_SWP32(&addr[2]);
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devid[1] = RD_SWP32(&addr[3]);
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if (devid[0] == AMD_ID_DL323B) {
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/*
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* we have 2 Banks
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* Bank 1 (23 Sectors): 0-7=8kbyte, 8-22=64kbyte
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* Bank 2 (48 Sectors): 23-70=64kbyte
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*/
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info->flash_id = (AMD_MANUFACT & FLASH_VENDMASK) |
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(AMD_ID_DL323B & FLASH_TYPEMASK);
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info->sector_count = 71;
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info->size = 4 * (8 * 8 + 63 * 64) * 1024;
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}
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else {
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info->size = 0;
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goto out;
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}
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/* set up sector start address table */
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for (i = 0; i < 8; i++) {
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info->start[i] = base + (i * 0x8000);
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}
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for (i = 8; i < info->sector_count; i++) {
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info->start[i] = base + (i * 0x40000) + 8 * 0x8000 - 8 * 0x40000;
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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 */
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addr = (volatile unsigned long *)(info->start[i]);
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addr[2 * 0x0555] = 0xAAAAAAAA;
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addr[2 * 0x02AA] = 0x55555555;
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addr[2 * 0x0555] = 0x90909090;
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addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
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addr[2 * 0x02AA + 1] = 0x55555555;
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addr[2 * 0x0555 + 1] = 0x90909090;
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udelay (1000);
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base = RD_SWP32(&addr[4]);
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base |= RD_SWP32(&addr[5]);
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info->protect[i] = base & 0x00010001 ? 1 : 0;
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}
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addr = (vu_long*)info->start[0];
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out:
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/* reset command */
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addr[0] = 0xf0f0f0f0;
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addr[1] = 0xf0f0f0f0;
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return info->size;
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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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vu_long *addr = (vu_long*)(info->start[0]);
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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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}
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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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addr[2 * 0x0555] = 0xAAAAAAAA;
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addr[2 * 0x02AA] = 0x55555555;
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addr[2 * 0x0555] = 0x80808080;
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addr[2 * 0x0555] = 0xAAAAAAAA;
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addr[2 * 0x02AA] = 0x55555555;
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addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
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addr[2 * 0x02AA + 1] = 0x55555555;
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addr[2 * 0x0555 + 1] = 0x80808080;
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addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
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addr[2 * 0x02AA + 1] = 0x55555555;
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udelay (100);
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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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addr = (vu_long*)(info->start[sect]);
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addr[0] = 0x30303030;
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addr[1] = 0x30303030;
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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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addr = (vu_long*)(info->start[l_sect]);
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while ( (addr[0] & 0x80808080) != 0x80808080 ||
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(addr[1] & 0x80808080) != 0x80808080) {
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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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addr = (volatile unsigned long *)info->start[0];
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addr[0] = 0xF0F0F0F0; /* reset bank */
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addr[1] = 0xF0F0F0F0; /* reset bank */
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printf (" done\n");
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return 0;
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}
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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 cp, wp, data;
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int i, l, rc;
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wp = (addr & ~3); /* get lower word 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 - wp) != 0) {
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data = 0;
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for (i=0, cp=wp; i<l; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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for (; i<4 && cnt>0; ++i) {
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data = (data << 8) | *src++;
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--cnt;
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++cp;
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}
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for (; cnt==0 && i<4; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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if ((rc = write_word(info, wp, data)) != 0) {
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return (rc);
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}
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wp += 4;
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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 (cnt >= 4) {
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data = 0;
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for (i=0; i<4; ++i) {
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data = (data << 8) | *src++;
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}
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if ((rc = write_word(info, wp, data)) != 0) {
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return (rc);
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}
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wp += 4;
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cnt -= 4;
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}
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if (cnt == 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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data = 0;
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for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
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data = (data << 8) | *src++;
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--cnt;
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}
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for (; i<4; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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return (write_word(info, wp, data));
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}
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/*-----------------------------------------------------------------------
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* Write a word 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_word (flash_info_t *info, ulong dest, ulong data)
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{
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vu_long *addr = (vu_long*)(info->start[0]);
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ulong start;
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int flag;
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/* Check if Flash is (sufficiently) erased */
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if ((*((vu_long *)dest) & data) != data) {
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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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if ((dest & 0x00000004) == 0) {
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addr[2 * 0x0555] = 0xAAAAAAAA;
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addr[2 * 0x02AA] = 0x55555555;
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addr[2 * 0x0555] = 0xA0A0A0A0;
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}
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else {
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addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
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addr[2 * 0x02AA + 1] = 0x55555555;
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addr[2 * 0x0555 + 1] = 0xA0A0A0A0;
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}
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*((vu_long *)dest) = data;
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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 ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
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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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/*-----------------------------------------------------------------------
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*/
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