489 lines
11 KiB
C
489 lines
11 KiB
C
/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
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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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/* #define DEBUG */
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#include <common.h>
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#include <environment.h>
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#define FLASH_BANK_SIZE 0x1000000 /* 16MB (2 x 8 MB) */
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#define MAIN_SECT_SIZE 0x40000 /* 256KB (2 x 128kB) */
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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#define CMD_READ_ARRAY 0x00FF00FF
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#define CMD_IDENTIFY 0x00900090
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#define CMD_ERASE_SETUP 0x00200020
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#define CMD_ERASE_CONFIRM 0x00D000D0
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#define CMD_PROGRAM 0x00400040
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#define CMD_RESUME 0x00D000D0
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#define CMD_SUSPEND 0x00B000B0
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#define CMD_STATUS_READ 0x00700070
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#define CMD_STATUS_RESET 0x00500050
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#define BIT_BUSY 0x00800080
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#define BIT_ERASE_SUSPEND 0x00400040
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#define BIT_ERASE_ERROR 0x00200020
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#define BIT_PROGRAM_ERROR 0x00100010
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#define BIT_VPP_RANGE_ERROR 0x00080008
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#define BIT_PROGRAM_SUSPEND 0x00040004
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#define BIT_PROTECT_ERROR 0x00020002
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#define BIT_UNDEFINED 0x00010001
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#define BIT_SEQUENCE_ERROR 0x00300030
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#define BIT_TIMEOUT 0x80000000
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/*-----------------------------------------------------------------------
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*/
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ulong flash_init (void)
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{
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int i, j;
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ulong size = 0;
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for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
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ulong flashbase = 0;
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flash_info[i].flash_id =
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(INTEL_MANUFACT & FLASH_VENDMASK) |
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(INTEL_ID_28F640J3A & FLASH_TYPEMASK);
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flash_info[i].size = FLASH_BANK_SIZE;
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flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
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memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
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if (i == 0)
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flashbase = CFG_FLASH_BASE;
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else
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panic ("configured too many flash banks!\n");
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for (j = 0; j < flash_info[i].sector_count; j++) {
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flash_info[i].start[j] = flashbase;
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/* uniform sector size */
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flashbase += MAIN_SECT_SIZE;
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}
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size += flash_info[i].size;
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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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flash_protect ( FLAG_PROTECT_SET,
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CFG_FLASH_BASE,
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CFG_FLASH_BASE + monitor_flash_len - 1,
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&flash_info[0]);
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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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#ifdef CFG_ENV_ADDR_REDUND
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flash_protect ( FLAG_PROTECT_SET,
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CFG_ENV_ADDR_REDUND,
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CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
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&flash_info[0]);
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#endif
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return size;
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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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switch (info->flash_id & FLASH_VENDMASK) {
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case (INTEL_MANUFACT & FLASH_VENDMASK):
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printf ("Intel: ");
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break;
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default:
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printf ("Unknown Vendor ");
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case (INTEL_ID_28F640J3A & FLASH_TYPEMASK):
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printf ("2x 28F640J3A (64Mbit)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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return;
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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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}
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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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printf ("\n");
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}
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/*-----------------------------------------------------------------------
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*/
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int flash_error (ulong code)
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{
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/* Check bit patterns */
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/* SR.7=0 is busy, SR.7=1 is ready */
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/* all other flags indicate error on 1 */
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/* SR.0 is undefined */
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/* Timeout is our faked flag */
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/* sequence is described in Intel 290644-005 document */
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/* check Timeout */
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if (code & BIT_TIMEOUT) {
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puts ("Timeout\n");
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return ERR_TIMOUT;
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}
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/* check Busy, SR.7 */
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if (~code & BIT_BUSY) {
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puts ("Busy\n");
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return ERR_PROG_ERROR;
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}
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/* check Vpp low, SR.3 */
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if (code & BIT_VPP_RANGE_ERROR) {
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puts ("Vpp range error\n");
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return ERR_PROG_ERROR;
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}
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/* check Device Protect Error, SR.1 */
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if (code & BIT_PROTECT_ERROR) {
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puts ("Device protect error\n");
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return ERR_PROG_ERROR;
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}
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/* check Command Seq Error, SR.4 & SR.5 */
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if (code & BIT_SEQUENCE_ERROR) {
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puts ("Command seqence error\n");
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return ERR_PROG_ERROR;
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}
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/* check Block Erase Error, SR.5 */
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if (code & BIT_ERASE_ERROR) {
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puts ("Block erase error\n");
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return ERR_PROG_ERROR;
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}
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/* check Program Error, SR.4 */
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if (code & BIT_PROGRAM_ERROR) {
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puts ("Program error\n");
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return ERR_PROG_ERROR;
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}
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/* check Block Erase Suspended, SR.6 */
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if (code & BIT_ERASE_SUSPEND) {
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puts ("Block erase suspended\n");
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return ERR_PROG_ERROR;
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}
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/* check Program Suspended, SR.2 */
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if (code & BIT_PROGRAM_SUSPEND) {
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puts ("Program suspended\n");
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return ERR_PROG_ERROR;
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}
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/* OK, no error */
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return ERR_OK;
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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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ulong result, result1;
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int iflag, prot, sect;
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int rc = ERR_OK;
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#ifdef USE_920T_MMU
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int cflag;
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#endif
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debug ("flash_erase: s_first %d s_last %d\n", s_first, s_last);
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/* first look for protection bits */
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if (info->flash_id == FLASH_UNKNOWN)
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return ERR_UNKNOWN_FLASH_TYPE;
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if ((s_first < 0) || (s_first > s_last)) {
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return ERR_INVAL;
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}
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if ((info->flash_id & FLASH_VENDMASK) !=
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(INTEL_MANUFACT & FLASH_VENDMASK)) {
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return ERR_UNKNOWN_FLASH_VENDOR;
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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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/*
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* Disable interrupts which might cause a timeout
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* here. Remember that our exception vectors are
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* at address 0 in the flash, and we don't want a
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* (ticker) exception to happen while the flash
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* chip is in programming mode.
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*/
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#ifdef USE_920T_MMU
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cflag = dcache_status ();
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dcache_disable ();
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#endif
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iflag = disable_interrupts ();
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
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debug ("Erasing sector %2d @ %08lX... ",
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sect, info->start[sect]);
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked();
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if (info->protect[sect] == 0) { /* not protected */
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vu_long *addr = (vu_long *) (info->start[sect]);
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ulong bsR7, bsR7_2, bsR5, bsR5_2;
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/* *addr = CMD_STATUS_RESET; */
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*addr = CMD_ERASE_SETUP;
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*addr = CMD_ERASE_CONFIRM;
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/* wait until flash is ready */
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do {
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/* check timeout */
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if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
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*addr = CMD_STATUS_RESET;
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result = BIT_TIMEOUT;
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break;
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}
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*addr = CMD_STATUS_READ;
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result = *addr;
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bsR7 = result & (1 << 7);
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bsR7_2 = result & (1 << 23);
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} while (!bsR7 | !bsR7_2);
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*addr = CMD_STATUS_READ;
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result1 = *addr;
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bsR5 = result1 & (1 << 5);
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bsR5_2 = result1 & (1 << 21);
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#ifdef SAMSUNG_FLASH_DEBUG
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printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
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if (bsR5 != 0 && bsR5_2 != 0)
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printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
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#endif
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*addr = CMD_READ_ARRAY;
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*addr = CMD_RESUME;
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if ((rc = flash_error (result)) != ERR_OK)
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goto outahere;
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#if 0
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printf ("ok.\n");
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} else { /* it was protected */
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printf ("protected!\n");
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#endif
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}
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}
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outahere:
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/* allow flash to settle - wait 10 ms */
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udelay_masked (10000);
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if (iflag)
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enable_interrupts ();
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#ifdef USE_920T_MMU
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if (cflag)
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dcache_enable ();
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#endif
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return rc;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash
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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 *) dest;
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ulong result;
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int rc = ERR_OK;
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int iflag;
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#ifdef USE_920T_MMU
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int cflag;
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#endif
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/*
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* Check if Flash is (sufficiently) erased
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*/
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result = *addr;
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if ((result & data) != data)
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return ERR_NOT_ERASED;
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/*
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* Disable interrupts which might cause a timeout
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* here. Remember that our exception vectors are
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* at address 0 in the flash, and we don't want a
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* (ticker) exception to happen while the flash
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* chip is in programming mode.
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*/
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#ifdef USE_920T_MMU
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cflag = dcache_status ();
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dcache_disable ();
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#endif
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iflag = disable_interrupts ();
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/* *addr = CMD_STATUS_RESET; */
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*addr = CMD_PROGRAM;
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*addr = data;
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked ();
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/* wait until flash is ready */
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do {
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/* check timeout */
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if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
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*addr = CMD_SUSPEND;
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result = BIT_TIMEOUT;
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break;
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}
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*addr = CMD_STATUS_READ;
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result = *addr;
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} while (~result & BIT_BUSY);
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/* *addr = CMD_READ_ARRAY; */
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*addr = CMD_STATUS_READ;
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result = *addr;
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rc = flash_error (result);
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if (iflag)
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enable_interrupts ();
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#ifdef USE_920T_MMU
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if (cflag)
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dcache_enable ();
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#endif
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*addr = CMD_READ_ARRAY;
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*addr = CMD_RESUME;
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return rc;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash.
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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 l;
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int i, 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 << 24);
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}
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for (; i < 4 && cnt > 0; ++i) {
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data = (data >> 8) | (*src++ << 24);
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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 << 24);
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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 = *((vu_long *) src);
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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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src += 4;
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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 ERR_OK;
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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++ << 24);
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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 << 24);
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}
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return write_word (info, wp, data);
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}
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