570 lines
13 KiB
C
570 lines
13 KiB
C
/*
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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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static ulong flash_get_size (vu_long *addr, flash_info_t *info);
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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#define CMD_READ_ARRAY 0x00F000F0
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#define CMD_UNLOCK1 0x00AA00AA
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#define CMD_UNLOCK2 0x00550055
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#define CMD_ERASE_SETUP 0x00800080
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#define CMD_ERASE_CONFIRM 0x00300030
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#define CMD_PROGRAM 0x00A000A0
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#define CMD_UNLOCK_BYPASS 0x00200020
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#define CMD_READ_MANF_ID 0x00900090
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#define CMD_UNLOCK_BYPASS_RES1 0x00900090
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#define CMD_UNLOCK_BYPASS_RES2 0x00000000
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#define MEM_FLASH_ADDR (*(volatile u32 *)CONFIG_SYS_FLASH_BASE)
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#define MEM_FLASH_ADDR1 (*(volatile u32 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 2)))
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#define MEM_FLASH_ADDR2 (*(volatile u32 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 2)))
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#define BIT_ERASE_DONE 0x00800080
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#define BIT_RDY_MASK 0x00800080
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#define BIT_PROGRAM_ERROR 0x00200020
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#define BIT_TIMEOUT 0x80000000 /* our flag */
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#define READY 1
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#define ERR 2
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#define TMO 4
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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<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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ulong flashbase = 0;
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flash_info_t *info = &flash_info[i];
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/* Init: no FLASHes known */
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info->flash_id = FLASH_UNKNOWN;
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size += flash_get_size (CONFIG_SYS_FLASH_BASE, info);
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if (i == 0)
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flashbase = CONFIG_SYS_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 < info->sector_count; j++) {
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info->protect[j] = 0;
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info->start[j] = flashbase;
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switch (info->flash_id & FLASH_TYPEMASK) {
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case (FLASH_AM320B & FLASH_TYPEMASK):
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case (FLASH_MXLV320B & FLASH_TYPEMASK):
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/* Boot sector type: 8 x 8 + N x 128 kB */
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flashbase += (j < 8) ? 0x4000 : 0x20000;
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break;
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case (FLASH_AM640U & FLASH_TYPEMASK):
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/* Uniform sector type: 128 kB */
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flashbase += 0x20000;
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break;
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default:
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printf ("## Bad flash chip type 0x%04lX\n",
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info->flash_id & FLASH_TYPEMASK);
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}
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}
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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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CONFIG_SYS_FLASH_BASE,
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CONFIG_SYS_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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CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
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#ifdef CONFIG_ENV_ADDR_REDUND
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flash_protect ( FLAG_PROTECT_SET,
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CONFIG_ENV_ADDR_REDUND,
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CONFIG_ENV_ADDR_REDUND + CONFIG_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 (FLASH_MAN_AMD & FLASH_VENDMASK):
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printf ("AMD "); break;
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case (FLASH_MAN_FUJ & FLASH_VENDMASK):
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printf ("FUJITSU "); break;
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case (FLASH_MAN_MX & FLASH_VENDMASK):
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printf ("MACRONIX "); 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_AM320B & FLASH_TYPEMASK):
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printf ("2x Am29LV320DB (32Mbit)\n");
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break;
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case (FLASH_MXLV320B & FLASH_TYPEMASK):
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printf ("2x MX29LV320DB (32Mbit)\n");
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break;
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case (FLASH_AM640U & FLASH_TYPEMASK):
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printf ("2x Am29LV640D (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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goto Done;
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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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Done: ;
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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;
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#if 0
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int cflag;
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#endif
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int iflag, prot, sect;
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int rc = ERR_OK;
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int chip1, chip2;
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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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switch (info->flash_id & FLASH_VENDMASK) {
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case (FLASH_MAN_AMD & FLASH_VENDMASK): break; /* OK */
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case (FLASH_MAN_FUJ & FLASH_VENDMASK): break; /* OK */
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case (FLASH_MAN_MX & FLASH_VENDMASK): break; /* OK */
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default:
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debug ("## flash_erase: unknown manufacturer\n");
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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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#if 0
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cflag = icache_status ();
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icache_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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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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*addr = CMD_ERASE_CONFIRM;
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/* wait until flash is ready */
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chip1 = chip2 = 0;
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do {
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result = *addr;
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/* check timeout */
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if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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chip1 = TMO;
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break;
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}
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if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
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chip1 = READY;
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if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
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chip1 = ERR;
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if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
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chip2 = READY;
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if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
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chip2 = ERR;
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} while (!chip1 || !chip2);
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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if (chip1 == ERR || chip2 == ERR) {
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rc = ERR_PROG_ERROR;
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printf ("Flash erase error\n");
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goto outahere;
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}
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if (chip1 == TMO) {
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rc = ERR_TIMOUT;
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printf ("Flash erase timeout error\n");
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goto outahere;
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}
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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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#if 0
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if (cflag)
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icache_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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#if 0
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int cflag;
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#endif
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int iflag;
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int chip1, chip2;
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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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#if 0
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cflag = icache_status ();
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icache_disable ();
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#endif
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iflag = disable_interrupts ();
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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MEM_FLASH_ADDR1 = 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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chip1 = chip2 = 0;
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do {
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result = *addr;
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/* check timeout */
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if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
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chip1 = ERR | TMO;
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break;
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}
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if (!chip1 && ((result & 0x80) == (data & 0x80)))
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chip1 = READY;
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if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
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result = *addr;
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if ((result & 0x80) == (data & 0x80))
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chip1 = READY;
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else
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chip1 = ERR;
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}
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if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
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chip2 = READY;
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if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
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result = *addr;
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if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
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chip2 = READY;
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else
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chip2 = ERR;
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}
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} while (!chip1 || !chip2);
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*addr = CMD_READ_ARRAY;
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if (chip1 == ERR || chip2 == ERR || *addr != data) {
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rc = ERR_PROG_ERROR;
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printf ("Flash program error\n");
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debug ("chip1: %#x, chip2: %#x, addr: %#lx *addr: %#lx, "
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"data: %#lx\n",
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chip1, chip2, addr, *addr, data);
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}
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if (iflag)
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enable_interrupts ();
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#if 0
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if (cflag)
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icache_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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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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goto Done;
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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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if (((ulong)src) & 0x3) {
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for (i = 0; i < 4; i++) {
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((char *)&data)[i] = ((vu_char *)src)[i];
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}
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}
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else {
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data = *((vu_long *) src);
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}
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if ((rc = write_word (info, wp, data)) != 0) {
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goto Done;
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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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rc = ERR_OK;
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goto Done;
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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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rc = write_word (info, wp, data);
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Done:
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return (rc);
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}
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/*-----------------------------------------------------------------------
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*/
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static ulong flash_get_size (vu_long *addr, flash_info_t *info)
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{
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ulong value;
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/* Write auto select command sequence and read Manufacturer ID */
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addr[0x0555] = CMD_UNLOCK1;
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addr[0x02AA] = CMD_UNLOCK2;
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addr[0x0555] = CMD_READ_MANF_ID;
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value = addr[0];
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debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
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switch (value) {
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case AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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break;
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case FUJ_MANUFACT:
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info->flash_id = FLASH_MAN_FUJ;
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break;
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case MX_MANUFACT:
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info->flash_id = FLASH_MAN_MX;
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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] = CMD_READ_ARRAY; /* restore read mode */
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debug ("## flash_init: unknown manufacturer\n");
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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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debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
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switch (value) {
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case AMD_ID_LV320B:
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info->flash_id += FLASH_AM320B;
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info->sector_count = 71;
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info->size = 0x00800000;
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addr[0] = CMD_READ_ARRAY; /* restore read mode */
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break; /* => 8 MB */
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case AMD_ID_LV640U:
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info->flash_id += FLASH_AM640U;
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info->sector_count = 128;
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info->size = 0x01000000;
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addr[0] = CMD_READ_ARRAY; /* restore read mode */
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break; /* => 16 MB */
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case MX_ID_LV320B:
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info->flash_id += FLASH_MXLV320B;
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info->sector_count = 71;
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info->size = 0x00800000;
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addr[0] = CMD_READ_ARRAY; /* restore read mode */
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break; /* => 8 MB */
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default:
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debug ("## flash_init: unknown flash chip\n");
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info->flash_id = FLASH_UNKNOWN;
|
|
addr[0] = CMD_READ_ARRAY; /* restore read mode */
|
|
return (0); /* => no or unknown flash */
|
|
|
|
}
|
|
|
|
if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
|
|
printf ("** ERROR: sector count %d > max (%d) **\n",
|
|
info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
|
|
info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
|
|
}
|
|
|
|
return (info->size);
|
|
}
|