450 lines
10 KiB
C
450 lines
10 KiB
C
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/*
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* (C) Copyright 2004
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* Elmeg Communications Systems GmbH, Juergen Selent (j.selent@elmeg.de)
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*
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* Support for the Elmeg VoVPN Gateway Module
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* ------------------------------------------
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* This is a signle bank flashdriver for INTEL 28F320J3, 28F640J3
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* and 28F128J3A flashs working in 8 Bit mode.
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*
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* Most of this code is taken from existing u-boot source code.
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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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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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#define FLASH_CMD_READ_ID 0x90
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#define FLASH_CMD_READ_STATUS 0x70
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#define FLASH_CMD_RESET 0xff
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#define FLASH_CMD_BLOCK_ERASE 0x20
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#define FLASH_CMD_ERASE_CONFIRM 0xd0
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#define FLASH_CMD_CLEAR_STATUS 0x50
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#define FLASH_CMD_SUSPEND_ERASE 0xb0
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#define FLASH_CMD_WRITE 0x40
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#define FLASH_CMD_WRITE_BUFF 0xe8
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#define FLASH_CMD_PROG_RESUME 0xd0
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#define FLASH_CMD_PROTECT 0x60
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#define FLASH_CMD_PROTECT_SET 0x01
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#define FLASH_CMD_PROTECT_CLEAR 0xd0
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#define FLASH_STATUS_DONE 0x80
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#define FLASH_WRITE_BUFFER_SIZE 32
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#ifdef CFG_FLASH_16BIT
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#define FLASH_WORD_SIZE unsigned short
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#define FLASH_ID_MASK 0xffff
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#define FLASH_CMD_ADDR_SHIFT 0
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#else
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#define FLASH_WORD_SIZE unsigned char
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#define FLASH_ID_MASK 0xff
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/* A0 is not used in either 8x or 16x for READ ID */
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#define FLASH_CMD_ADDR_SHIFT 1
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#endif
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static unsigned long
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flash_get(volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
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{
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volatile FLASH_WORD_SIZE *p;
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FLASH_WORD_SIZE value;
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int i;
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addr[0] = FLASH_CMD_READ_ID;
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/* manufactor */
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value = addr[0 << FLASH_CMD_ADDR_SHIFT];
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switch (value) {
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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 = FLASH_CMD_RESET;
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return (0);
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}
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/* device */
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value = addr[1 << FLASH_CMD_ADDR_SHIFT];
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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;
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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;
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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;
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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 = FLASH_CMD_RESET;
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return (0);
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}
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/* setup sectors */
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for (i = 0; i < info->sector_count; i++) {
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info->start[i] = (unsigned long)addr + (i * info->size/info->sector_count);
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}
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/* check protected sectors */
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for (i = 0; i < info->sector_count; i++) {
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p = (volatile FLASH_WORD_SIZE *)(info->start[i]);
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info->protect[i] = p[2 << FLASH_CMD_ADDR_SHIFT] & 1;
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}
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/* reset bank */
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*addr = FLASH_CMD_RESET;
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return (info->size);
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}
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unsigned long
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flash_init(void)
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{
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unsigned long size;
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int i;
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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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size = flash_get((volatile FLASH_WORD_SIZE *)CFG_FLASH_BASE, &flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH Size=0x%08lx\n", size);
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return (0);
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}
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/* always protect 1 sector containing the HRCW */
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flash_protect(FLAG_PROTECT_SET,
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flash_info[0].start[0],
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flash_info[0].start[1] - 1,
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&flash_info[0]);
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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_FLASH,
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CFG_MONITOR_FLASH+CFG_MONITOR_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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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);
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}
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void
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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_INTEL: printf ("INTEL "); 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 ("28F320JA3 (32 Mbit)\n");
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break;
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case FLASH_28F640J3A: printf ("28F640JA3 (64 Mbit)\n");
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break;
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case FLASH_28F128J3A: printf ("28F128JA3 (128 Mbit)\n");
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break;
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default: printf ("Unknown Chip Type");
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break;
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}
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printf (" Size: %ld MB in %d Sectors\n",
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info->size >> 20, info->sector_count);
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printf (" Sector Start Addresses:");
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for (i=0; i<info->sector_count; ++i) {
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if ((i % 5) == 0)
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printf ("\n ");
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printf (" %08lX%s",
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info->start[i],
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info->protect[i] ? " (RO)" : " "
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);
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}
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printf ("\n");
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}
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int
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flash_erase(flash_info_t *info, int s_first, int s_last)
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{
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unsigned long start, now, last;
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int flag, prot, sect;
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volatile FLASH_WORD_SIZE *addr;
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FLASH_WORD_SIZE status;
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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_UNKNOWN) {
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printf ("Cannot erase unknown flash - 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", 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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for (sect = s_first; sect<=s_last; sect++) {
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if (info->protect[sect]) {
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continue;
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}
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addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
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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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}
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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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printf (" done\n");
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return (0);
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}
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static int
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write_buff2( volatile FLASH_WORD_SIZE *dst,
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volatile FLASH_WORD_SIZE *src,
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unsigned long cnt )
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{
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unsigned long start;
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FLASH_WORD_SIZE status;
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int flag, i;
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start = get_timer (0);
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while (1) {
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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dst[0] = FLASH_CMD_WRITE_BUFF;
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if ((status = *dst) & FLASH_STATUS_DONE) {
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break;
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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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}
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if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
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return (-1);
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}
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}
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dst[0] = (FLASH_WORD_SIZE)(cnt - 1);
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for (i=0; i<cnt; i++) {
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dst[i] = src[i];
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}
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dst[0] = FLASH_CMD_PROG_RESUME;
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if (flag) {
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enable_interrupts();
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}
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return( 0 );
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}
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static int
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poll_status( volatile FLASH_WORD_SIZE *addr )
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{
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unsigned long start;
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start = get_timer (0);
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/* wait for error or finish */
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while (1) {
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if (*addr == FLASH_STATUS_DONE) {
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if (*addr == FLASH_STATUS_DONE) {
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break;
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}
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}
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if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
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*addr = FLASH_CMD_RESET;
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return (-1);
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}
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}
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*addr = FLASH_CMD_RESET;
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return (0);
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}
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/*
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* write_buff return values:
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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
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write_buff(flash_info_t *info, uchar *src, ulong udst, ulong cnt)
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{
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volatile FLASH_WORD_SIZE *addr, *dst;
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unsigned long bcnt;
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int flag, i;
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if (info->flash_id == FLASH_UNKNOWN) {
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return (4);
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}
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addr = (volatile FLASH_WORD_SIZE *)(info->start[0]);
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dst = (volatile FLASH_WORD_SIZE *) udst;
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#ifdef CFG_FLASH_16BIT
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#error NYI
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#else
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while (cnt > 0) {
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/* Check if buffer write is possible */
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if (cnt > 1 && (((unsigned long)dst & (FLASH_WRITE_BUFFER_SIZE - 1)) == 0)) {
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bcnt = cnt > FLASH_WRITE_BUFFER_SIZE ? FLASH_WRITE_BUFFER_SIZE : cnt;
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/* Check if Flash is (sufficiently) erased */
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for (i=0; i<bcnt; i++) {
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if ((dst[i] & src[i]) != src[i]) {
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return (2);
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}
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}
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|
|
if (write_buff2( dst,src,bcnt ) != 0) {
|
||
|
|
addr[0] = FLASH_CMD_READ_STATUS;
|
||
|
|
}
|
||
|
|
if (poll_status( dst ) != 0) {
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
cnt -= bcnt;
|
||
|
|
dst += bcnt;
|
||
|
|
src += bcnt;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check if Flash is (sufficiently) erased */
|
||
|
|
if ((*dst & *src) != *src) {
|
||
|
|
return (2);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Disable interrupts which might cause a timeout here */
|
||
|
|
flag = disable_interrupts();
|
||
|
|
addr[0] = FLASH_CMD_ERASE_CONFIRM;
|
||
|
|
addr[0] = FLASH_CMD_WRITE;
|
||
|
|
*dst++ = *src++;
|
||
|
|
/* re-enable interrupts if necessary */
|
||
|
|
if (flag) {
|
||
|
|
enable_interrupts();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (poll_status( dst ) != 0) {
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
cnt --;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
flash_real_protect(flash_info_t *info, long sector, int prot)
|
||
|
|
{
|
||
|
|
volatile FLASH_WORD_SIZE *addr;
|
||
|
|
unsigned long start;
|
||
|
|
|
||
|
|
addr = (volatile FLASH_WORD_SIZE *)(info->start[sector]);
|
||
|
|
*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);
|
||
|
|
}
|