518 lines
11 KiB
C
518 lines
11 KiB
C
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/*
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* (C) Copyright 2003
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* Martin Winistoerfer, martinwinistoerfer@gmx.ch.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* File: flash.c
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*
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* Discription: This Driver is for 28F320J3A, 28F640J3A and
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* 28F128J3A Intel flashs working in 16 Bit mode.
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* They are single bank flashs.
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*
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* Most of this code is taken from existing u-boot
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* source code.
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*/
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#include <common.h>
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#include <mpc5xx.h>
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#if defined(CFG_ENV_IS_IN_FLASH)
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# ifndef CFG_ENV_ADDR
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# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
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# endif
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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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# ifndef CFG_ENV_SECT_SIZE
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# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
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# endif
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#endif
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#define FLASH_ID_MASK 0xFFFF
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#define FLASH_BLOCK_SIZE 0x00010000
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#define FLASH_CMD_READ_ID 0x0090
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#define FLASH_CMD_RESET 0x00ff
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#define FLASH_CMD_BLOCK_ERASE 0x0020
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#define FLASH_CMD_ERASE_CONFIRM 0x00D0
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#define FLASH_CMD_CLEAR_STATUS 0x0050
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#define FLASH_CMD_SUSPEND_ERASE 0x00B0
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#define FLASH_CMD_WRITE 0x0040
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#define FLASH_CMD_PROTECT 0x0060
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#define FLASH_CMD_PROTECT_SET 0x0001
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#define FLASH_CMD_PROTECT_CLEAR 0x00D0
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#define FLASH_STATUS_DONE 0x0080
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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/*
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* Local function prototypes
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*/
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static ulong flash_get_size (vu_short *addr, flash_info_t *info);
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static int write_short (flash_info_t *info, ulong dest, ushort data);
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static void flash_get_offsets (ulong base, flash_info_t *info);
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/*
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* Initialize flash
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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;
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int i;
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/* Init: no FLASHes known */
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for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/* Static FLASH Bank configuration here - FIXME XXX */
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#if 1
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debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
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#endif
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size_b0 = flash_get_size((vu_short *)FLASH_BASE0_PRELIM, &flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH on Bank 0: "
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"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
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flash_info[0].flash_id,
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size_b0, size_b0<<20);
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}
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flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
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flash_info[0].size = size_b0;
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#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
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/* monitor protection ON by default */
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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,
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&flash_info[0]);
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#endif
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#ifdef CFG_ENV_IS_IN_FLASH
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/* ENV protection ON by default */
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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_SECT_SIZE-1,
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&flash_info[0]);
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#endif
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return size_b0;
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}
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/*
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* Compute start adress of each sector (block)
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*/
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static void flash_get_offsets (ulong base, 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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return;
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}
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switch (info->flash_id & FLASH_VENDMASK) {
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case FLASH_MAN_INTEL:
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for (i = 0; i < info->sector_count; i++) {
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info->start[i] = base + i * FLASH_BLOCK_SIZE;
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}
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return;
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default:
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printf ("Don't know sector offsets for flash type 0x%lx\n",
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info->flash_id);
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return;
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}
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}
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/*
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* Print flash information
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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 FLASH_MAN_AMD: printf ("AMD "); break;
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case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
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case FLASH_MAN_SST: printf ("SST "); break;
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case FLASH_MAN_STM: printf ("STM "); break;
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case FLASH_MAN_INTEL: printf ("Intel "); break;
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case FLASH_MAN_MT: printf ("MT "); break;
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default: printf ("Unknown Vendor "); break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_28F320J3A: printf ("28F320J3A (32Mbit) 16-Bit\n");
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break;
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case FLASH_28F640J3A: printf ("28F640J3A (64Mbit) 16-Bit\n");
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break;
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case FLASH_28F128J3A: printf ("28F128J3A (128Mbit) 16-Bit\n");
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break;
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default: printf ("Unknown Chip Type\n");
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break;
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}
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if (info->size >= (1 << 20)) {
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i = 20;
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} else {
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i = 10;
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}
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printf (" Size: %ld %cB in %d Sectors\n",
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info->size >> i,
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(i == 20) ? 'M' : 'k',
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info->sector_count);
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printf (" Sector Start Addresses:");
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for (i=0; i<info->sector_count; ++i) {
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if ((i % 5) == 0)
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printf ("\n ");
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printf (" %08lX%s",
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info->start[i],
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info->protect[i] ? " (RO)" : " "
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);
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}
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printf ("\n");
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return;
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}
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/*
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* Get size of flash in bytes.
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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_short *addr, flash_info_t *info)
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{
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vu_short value;
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/* Read Manufacturer ID */
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addr[0] = FLASH_CMD_READ_ID;
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value = addr[0];
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switch (value) {
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case (AMD_MANUFACT & FLASH_ID_MASK):
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info->flash_id = FLASH_MAN_AMD;
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break;
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case (FUJ_MANUFACT & FLASH_ID_MASK):
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info->flash_id = FLASH_MAN_FUJ;
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break;
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case (SST_MANUFACT & FLASH_ID_MASK):
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info->flash_id = FLASH_MAN_SST;
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break;
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case (STM_MANUFACT & FLASH_ID_MASK):
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info->flash_id = FLASH_MAN_STM;
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break;
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case (INTEL_MANUFACT & FLASH_ID_MASK):
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info->flash_id = FLASH_MAN_INTEL;
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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info->sector_count = 0;
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info->size = 0;
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addr[0] = FLASH_CMD_RESET; /* restore read mode */
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return (0); /* no or unknown flash */
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}
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value = addr[1]; /* device ID */
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switch (value) {
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case (INTEL_ID_28F320J3A & FLASH_ID_MASK):
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info->flash_id += FLASH_28F320J3A;
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info->sector_count = 32;
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info->size = 0x00400000;
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break; /* => 32 MBit */
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case (INTEL_ID_28F640J3A & FLASH_ID_MASK):
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info->flash_id += FLASH_28F640J3A;
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info->sector_count = 64;
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info->size = 0x00800000;
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break; /* => 64 MBit */
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case (INTEL_ID_28F128J3A & FLASH_ID_MASK):
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info->flash_id += FLASH_28F128J3A;
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info->sector_count = 128;
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info->size = 0x01000000;
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break; /* => 128 MBit */
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default:
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info->flash_id = FLASH_UNKNOWN;
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addr[0] = FLASH_CMD_RESET; /* restore read mode */
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return (0); /* => no or unknown flash */
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}
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if (info->sector_count > CFG_MAX_FLASH_SECT) {
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printf ("** ERROR: sector count %d > max (%d) **\n",
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info->sector_count, CFG_MAX_FLASH_SECT);
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info->sector_count = CFG_MAX_FLASH_SECT;
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}
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addr[0] = FLASH_CMD_RESET; /* restore read mode */
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return (info->size);
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}
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/*
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* Erase unprotected sectors
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*/
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int flash_erase (flash_info_t *info, int s_first, int s_last)
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{
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int flag, prot, sect;
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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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if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
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printf ("Can erase only Intel flash types - aborted\n");
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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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start = get_timer (0);
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last = start;
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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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vu_short *addr = (vu_short *)(info->start[sect]);
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unsigned long status;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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#ifdef DEBUG
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printf("Erase sector %d at start addr 0x%08X", sect, (unsigned int)info->start[sect]);
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#endif
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*addr = FLASH_CMD_CLEAR_STATUS;
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*addr = FLASH_CMD_BLOCK_ERASE;
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*addr = FLASH_CMD_ERASE_CONFIRM;
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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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while (((status = *addr) & FLASH_STATUS_DONE) != FLASH_STATUS_DONE) {
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if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
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printf("Flash erase timeout at address %lx\n", info->start[sect]);
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*addr = FLASH_CMD_SUSPEND_ERASE;
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*addr = FLASH_CMD_RESET;
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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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putc ('.');
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last = now;
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}
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}
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*addr = FLASH_CMD_RESET;
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}
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}
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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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* 4 - Flash not identified
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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;
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ushort data;
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int i, rc;
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|
|
if (info->flash_id == FLASH_UNKNOWN) {
|
||
|
|
return 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
wp = (addr & ~1); /* get lower word aligned address */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* handle unaligned start byte
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (addr - wp) {
|
||
|
|
data = 0;
|
||
|
|
data = (data << 8) | *src++;
|
||
|
|
--cnt;
|
||
|
|
if ((rc = write_short(info, wp, data)) != 0) {
|
||
|
|
return (rc);
|
||
|
|
}
|
||
|
|
wp += 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* handle word aligned part
|
||
|
|
*/
|
||
|
|
|
||
|
|
while (cnt >= 2) {
|
||
|
|
data = 0;
|
||
|
|
for (i=0; i<2; ++i) {
|
||
|
|
data = (data << 8) | *src++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((rc = write_short(info, wp, data)) != 0) {
|
||
|
|
return (rc);
|
||
|
|
}
|
||
|
|
wp += 2;
|
||
|
|
cnt -= 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cnt == 0) {
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* handle unaligned tail bytes
|
||
|
|
*/
|
||
|
|
|
||
|
|
data = 0;
|
||
|
|
for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
|
||
|
|
data = (data << 8) | *src++;
|
||
|
|
--cnt;
|
||
|
|
}
|
||
|
|
for (; i<2; ++i, ++cp) {
|
||
|
|
data = (data << 8) | (*(uchar *)cp);
|
||
|
|
}
|
||
|
|
|
||
|
|
return (write_short(info, wp, data));
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Write 16 bit (short) to flash
|
||
|
|
*/
|
||
|
|
|
||
|
|
static int write_short (flash_info_t *info, ulong dest, ushort data)
|
||
|
|
{
|
||
|
|
vu_short *addr = (vu_short*)(info->start[0]);
|
||
|
|
ulong start;
|
||
|
|
int flag;
|
||
|
|
|
||
|
|
/* Check if Flash is (sufficiently) erased */
|
||
|
|
if ((*((vu_short *)dest) & data) != data) {
|
||
|
|
return (2);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Disable interrupts which might cause a timeout here */
|
||
|
|
flag = disable_interrupts();
|
||
|
|
|
||
|
|
if (!(info->flash_id & FLASH_VENDMASK)) {
|
||
|
|
return 4;
|
||
|
|
}
|
||
|
|
*addr = FLASH_CMD_ERASE_CONFIRM;
|
||
|
|
*addr = FLASH_CMD_WRITE;
|
||
|
|
|
||
|
|
*((vu_short *)dest) = data;
|
||
|
|
|
||
|
|
/* re-enable interrupts if necessary */
|
||
|
|
if (flag) {
|
||
|
|
enable_interrupts();
|
||
|
|
}
|
||
|
|
|
||
|
|
/* data polling for D7 */
|
||
|
|
start = get_timer (0);
|
||
|
|
|
||
|
|
/* wait for error or finish */
|
||
|
|
while(!(addr[0] & FLASH_STATUS_DONE)){
|
||
|
|
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
|
||
|
|
addr[0] = FLASH_CMD_RESET;
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*addr = FLASH_CMD_RESET;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Protects a flash sector
|
||
|
|
*/
|
||
|
|
|
||
|
|
int flash_real_protect(flash_info_t *info, long sector, int prot)
|
||
|
|
{
|
||
|
|
vu_short *addr = (vu_short*)(info->start[sector]);
|
||
|
|
ulong start;
|
||
|
|
|
||
|
|
*addr = FLASH_CMD_CLEAR_STATUS;
|
||
|
|
*addr = FLASH_CMD_PROTECT;
|
||
|
|
|
||
|
|
if(prot) {
|
||
|
|
*addr = FLASH_CMD_PROTECT_SET;
|
||
|
|
} else {
|
||
|
|
*addr = FLASH_CMD_PROTECT_CLEAR;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* wait for error or finish */
|
||
|
|
start = get_timer (0);
|
||
|
|
while(!(addr[0] & FLASH_STATUS_DONE)){
|
||
|
|
if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
|
||
|
|
printf("Flash protect timeout at address %lx\n", info->start[sector]);
|
||
|
|
addr[0] = FLASH_CMD_RESET;
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/* Set software protect flag */
|
||
|
|
info->protect[sector] = prot;
|
||
|
|
*addr = FLASH_CMD_RESET;
|
||
|
|
return (0);
|
||
|
|
}
|