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https://github.com/AsahiLinux/u-boot
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624 lines
14 KiB
C
624 lines
14 KiB
C
/*
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* (C) Copyright 2001-2005
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Flash Routines for Intel devices
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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 "cpu87.h"
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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/*-----------------------------------------------------------------------
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*/
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ulong flash_int_get_size (volatile unsigned long *baseaddr,
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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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info->sector_count = info->size = 0;
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info->flash_id = FLASH_UNKNOWN;
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/* Write identify command sequence and test FLASH answer
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*/
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baseaddr[0] = 0x00900090;
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baseaddr[1] = 0x00900090;
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flashtest_h = baseaddr[0]; /* manufacturer ID */
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flashtest_l = baseaddr[1];
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if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT)
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return (0); /* no or unknown flash */
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flashtest_h = baseaddr[2]; /* device ID */
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flashtest_l = baseaddr[3];
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if (flashtest_h != flashtest_l)
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return (0);
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switch (flashtest_h) {
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case INTEL_ID_28F160C3B:
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info->flash_id = FLASH_28F160C3B;
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info->sector_count = 39;
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info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
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break;
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case INTEL_ID_28F160F3B:
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info->flash_id = FLASH_28F160F3B;
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info->sector_count = 39;
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info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
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break;
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case INTEL_ID_28F640C3B:
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info->flash_id = FLASH_28F640C3B;
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info->sector_count = 135;
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info->size = 0x02000000; /* 16 * 2 MB = 32 MB */
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break;
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default:
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return (0); /* no or unknown flash */
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}
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info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */
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if (info->flash_id & FLASH_BTYPE) {
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volatile unsigned long *tmp = baseaddr;
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/* set up sector start adress table (bottom sector type)
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* AND unlock the sectors (if our chip is 160C3)
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*/
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for (i = 0; i < info->sector_count; i++) {
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if (((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) ||
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((info->flash_id & FLASH_TYPEMASK) == FLASH_28F640C3B)) {
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tmp[0] = 0x00600060;
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tmp[1] = 0x00600060;
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tmp[0] = 0x00D000D0;
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tmp[1] = 0x00D000D0;
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}
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info->start[i] = (uint) tmp;
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tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith */
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}
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}
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memset (info->protect, 0, info->sector_count);
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baseaddr[0] = 0x00FF00FF;
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baseaddr[1] = 0x00FF00FF;
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return (info->size);
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}
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static ulong flash_amd_get_size (vu_char *addr, flash_info_t *info)
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{
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short i;
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uchar vendor, devid;
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ulong base = (ulong)addr;
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/* Write auto select command: read Manufacturer ID */
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addr[0x0555] = 0xAA;
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addr[0x02AA] = 0x55;
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addr[0x0555] = 0x90;
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udelay(1000);
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vendor = addr[0];
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devid = addr[1] & 0xff;
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/* only support AMD */
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if (vendor != 0x01) {
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return 0;
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}
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vendor &= 0xf;
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devid &= 0xff;
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if (devid == AMD_ID_F040B) {
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info->flash_id = vendor << 16 | devid;
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info->sector_count = 8;
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info->size = info->sector_count * 0x10000;
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}
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else if (devid == AMD_ID_F080B) {
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info->flash_id = vendor << 16 | devid;
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info->sector_count = 16;
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info->size = 4 * info->sector_count * 0x10000;
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}
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else if (devid == AMD_ID_F016D) {
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info->flash_id = vendor << 16 | devid;
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info->sector_count = 32;
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info->size = 4 * info->sector_count * 0x10000;
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}
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else {
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printf ("## Unknown Flash Type: %02x\n", devid);
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return 0;
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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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/* sector base address */
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info->start[i] = base + i * (info->size / info->sector_count);
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/* read sector protection at sector address, (A7 .. A0) = 0x02 */
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/* D0 = 1 if protected */
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addr = (volatile unsigned char *)(info->start[i]);
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info->protect[i] = addr[2] & 1;
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}
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/*
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* Prevent writes to uninitialized FLASH.
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*/
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if (info->flash_id != FLASH_UNKNOWN) {
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addr = (vu_char *)info->start[0];
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addr[0] = 0xF0; /* reset bank */
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}
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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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unsigned long size_b1 = 0;
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int i;
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/* Init: no FLASHes known
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*/
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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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/* Disable flash protection */
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CPU86_BCR |= (CPU86_BCR_FWPT | CPU86_BCR_FWRE);
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/* Static FLASH Bank configuration here (only one bank) */
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size_b0 = flash_int_get_size ((ulong *) CFG_FLASH_BASE, &flash_info[0]);
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size_b1 = flash_amd_get_size ((uchar *) CFG_BOOTROM_BASE, &flash_info[1]);
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if (size_b0 > 0 || size_b1 > 0) {
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printf("(");
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if (size_b0 > 0) {
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puts ("Bank#1 - ");
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print_size (size_b0, (size_b1 > 0) ? ", " : ") ");
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}
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if (size_b1 > 0) {
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puts ("Bank#2 - ");
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print_size (size_b1, ") ");
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}
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}
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else {
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printf ("## No FLASH found.\n");
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return 0;
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}
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/* protect monitor and environment sectors
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*/
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#if CFG_MONITOR_BASE >= CFG_BOOTROM_BASE
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if (size_b1) {
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/* If U-Boot is booted from ROM the CFG_MONITOR_BASE > CFG_FLASH_BASE
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* but we shouldn't protect it.
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*/
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flash_protect (FLAG_PROTECT_SET,
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CFG_MONITOR_BASE,
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CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[1]
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);
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}
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#else
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#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
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flash_protect (FLAG_PROTECT_SET,
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CFG_MONITOR_BASE,
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CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]
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);
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#endif
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#endif
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#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
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# ifndef CFG_ENV_SIZE
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# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
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# endif
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# if CFG_ENV_ADDR >= CFG_BOOTROM_BASE
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if (size_b1) {
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flash_protect (FLAG_PROTECT_SET,
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CFG_ENV_ADDR,
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CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[1]);
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}
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# else
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flash_protect (FLAG_PROTECT_SET,
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CFG_ENV_ADDR,
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CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
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# endif
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#endif
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return (size_b0 + size_b1);
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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 0x89:
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printf ("INTEL ");
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break;
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case 0x1:
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printf ("AMD ");
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break;
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default:
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printf ("Unknown Vendor ");
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_28F160C3B:
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printf ("28F160C3B (16 Mbit, bottom sector)\n");
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break;
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case FLASH_28F160F3B:
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printf ("28F160F3B (16 Mbit, bottom sector)\n");
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break;
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case FLASH_28F640C3B:
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printf ("28F640C3B (64 M, bottom sector)\n");
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break;
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case AMD_ID_F040B:
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printf ("AM29F040B (4 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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if (info->size < 0x100000)
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printf (" Size: %ld KB in %d Sectors\n",
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info->size >> 10, info->sector_count);
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else
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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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}
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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_char *addr = (vu_char *)(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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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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/* Check the type of erased flash
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*/
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if (info->flash_id >> 16 == 0x1) {
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/* Erase AMD flash
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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[0x0555] = 0xAA;
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addr[0x02AA] = 0x55;
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addr[0x0555] = 0x80;
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addr[0x0555] = 0xAA;
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addr[0x02AA] = 0x55;
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/* wait at least 80us - let's wait 1 ms */
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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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addr = (vu_char *)(info->start[sect]);
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addr[0] = 0x30;
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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 AMD_DONE;
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start = get_timer (0);
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last = start;
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addr = (vu_char *)(info->start[l_sect]);
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while ((addr[0] & 0x80) != 0x80) {
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if ((now = get_timer(start)) > CFG_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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AMD_DONE:
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/* reset to read mode */
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addr = (volatile unsigned char *)info->start[0];
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addr[0] = 0xF0; /* reset bank */
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} else {
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/* Erase Intel flash
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*/
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/* Start erase on unprotected sectors
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*/
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for (sect = s_first; sect <= s_last; sect++) {
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volatile ulong *addr =
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(volatile unsigned long *) info->start[sect];
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start = get_timer (0);
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last = start;
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if (info->protect[sect] == 0) {
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/* Disable interrupts which might cause a timeout here
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*/
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flag = disable_interrupts ();
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/* Erase the block
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*/
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addr[0] = 0x00200020;
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addr[1] = 0x00200020;
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addr[0] = 0x00D000D0;
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addr[1] = 0x00D000D0;
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/* re-enable interrupts if necessary
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*/
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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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*/
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udelay (1000);
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last = start;
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while ((addr[0] & 0x00800080) != 0x00800080 ||
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(addr[1] & 0x00800080) != 0x00800080) {
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if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
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printf ("Timeout (erase suspended!)\n");
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/* Suspend erase
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*/
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addr[0] = 0x00B000B0;
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addr[1] = 0x00B000B0;
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goto DONE;
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}
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/* show that we're waiting
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*/
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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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if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {
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printf ("*** ERROR: erase failed!\n");
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goto DONE;
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}
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}
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/* Clear status register and reset to read mode
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*/
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addr[0] = 0x00500050;
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addr[1] = 0x00500050;
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addr[0] = 0x00FF00FF;
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addr[1] = 0x00FF00FF;
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}
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}
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printf (" done\n");
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DONE:
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return 0;
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}
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static int write_word (flash_info_t *, volatile unsigned long *, ulong);
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static int write_byte (flash_info_t *info, ulong dest, uchar data);
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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 v;
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int i, l, rc, cc = cnt, res = 0;
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if (info->flash_id >> 16 == 0x1) {
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/* Write to AMD 8-bit flash
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*/
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while (cnt > 0) {
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if ((rc = write_byte(info, addr, *src)) != 0) {
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return (rc);
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}
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addr++;
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src++;
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cnt--;
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}
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return (0);
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} else {
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/* Write to Intel 64-bit flash
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*/
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for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
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l = (addr & 3);
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addr &= ~3;
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for (i = 0; i < 4; i++) {
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v = (v << 8) + (i < l || i - l >= cc ?
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*((unsigned char *) addr + i) : *src++);
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}
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if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
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break;
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}
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}
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return (res);
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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, volatile unsigned long *addr,
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ulong data)
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{
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int flag, res = 0;
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ulong start;
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/* Check if Flash is (sufficiently) erased
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*/
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if ((*addr & data) != data)
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return (2);
|
|
|
|
/* Disable interrupts which might cause a timeout here
|
|
*/
|
|
flag = disable_interrupts ();
|
|
|
|
*addr = 0x00400040;
|
|
*addr = data;
|
|
|
|
/* re-enable interrupts if necessary
|
|
*/
|
|
if (flag)
|
|
enable_interrupts ();
|
|
|
|
start = get_timer (0);
|
|
while ((*addr & 0x00800080) != 0x00800080) {
|
|
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
|
|
/* Suspend program
|
|
*/
|
|
*addr = 0x00B000B0;
|
|
res = 1;
|
|
goto OUT;
|
|
}
|
|
}
|
|
|
|
if (*addr & 0x00220022) {
|
|
printf ("*** ERROR: program failed!\n");
|
|
res = 1;
|
|
}
|
|
|
|
OUT:
|
|
/* Clear status register and reset to read mode
|
|
*/
|
|
*addr = 0x00500050;
|
|
*addr = 0x00FF00FF;
|
|
|
|
return (res);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Write a byte to Flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
static int write_byte (flash_info_t *info, ulong dest, uchar data)
|
|
{
|
|
vu_char *addr = (vu_char *)(info->start[0]);
|
|
ulong start;
|
|
int flag;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*((vu_char *)dest) & data) != data) {
|
|
return (2);
|
|
}
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
addr[0x0555] = 0xAA;
|
|
addr[0x02AA] = 0x55;
|
|
addr[0x0555] = 0xA0;
|
|
|
|
*((vu_char *)dest) = data;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer (0);
|
|
while ((*((vu_char *)dest) & 0x80) != (data & 0x80)) {
|
|
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|