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455 lines
11 KiB
C
455 lines
11 KiB
C
/*
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* (C) Copyright 2001
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* Wolfgang Denk, DENX Software Engineering, wd@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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#include <common.h>
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#include <mpc824x.h>
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#if defined(CONFIG_ENV_IS_IN_FLASH)
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# ifndef CONFIG_ENV_ADDR
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# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
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# endif
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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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# ifndef CONFIG_ENV_SECT_SIZE
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# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
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# endif
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#endif
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/*---------------------------------------------------------------------*/
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#define DEBUG_FLASH
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#ifdef DEBUG_FLASH
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#define DEBUGF(fmt,args...) printf(fmt ,##args)
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#else
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#define DEBUGF(fmt,args...)
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#endif
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/*---------------------------------------------------------------------*/
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static ulong flash_get_size (vu_char *addr, flash_info_t *info);
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static int write_data (flash_info_t *info, uchar *dest, uchar data);
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static void flash_get_offsets (ulong base, flash_info_t *info);
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#define BS(b) (b)
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#define BYTEME(x) ((x) & 0xFF)
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/*-----------------------------------------------------------------------
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*/
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unsigned long flash_init (void)
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{
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unsigned long flash_banks[CONFIG_SYS_MAX_FLASH_BANKS] = CONFIG_SYS_FLASH_BANKS;
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unsigned long size, size_b[CONFIG_SYS_MAX_FLASH_BANKS];
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int i;
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/* Init: no FLASHes known */
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for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
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{
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flash_info[i].flash_id = FLASH_UNKNOWN;
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DEBUGF("Get flash bank %d @ 0x%08lx\n", i, flash_banks[i]);
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/*
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size_b[i] = flash_get_size((vu_char *)flash_banks[i], &flash_info[i]);
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*/
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size_b[i] = flash_get_size((vu_char *) 0xff800000 , &flash_info[i]);
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if (flash_info[i].flash_id == FLASH_UNKNOWN)
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{
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printf ("## Unknown FLASH on Bank %d: "
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"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
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i, flash_info[i].flash_id,
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size_b[i], size_b[i]<<20);
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}
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else
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{
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DEBUGF("## Flash bank %d at 0x%08lx sizes: 0x%08lx \n",
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i, flash_banks[i], size_b[i]);
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flash_get_offsets (flash_banks[i], &flash_info[i]);
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flash_info[i].size = size_b[i];
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}
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}
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#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
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DEBUGF("protect monitor %x @ %x\n", CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_LEN);
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/* monitor protection ON by default */
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1,
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&flash_info[0]);
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#endif
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#ifdef CONFIG_ENV_IS_IN_FLASH
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/* ENV protection ON by default */
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DEBUGF("protect environtment %x @ %x\n", CONFIG_ENV_ADDR, CONFIG_ENV_SECT_SIZE);
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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_SECT_SIZE-1,
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&flash_info[0]);
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#endif
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size = 0;
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DEBUGF("## Final Flash bank sizes: ");
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for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
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{
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DEBUGF("%08lx ", size_b[i]);
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size += size_b[i];
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}
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DEBUGF("\n");
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return (size);
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}
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/*-----------------------------------------------------------------------
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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;
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base += 0x00020000; /* 128k per bank */
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}
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return;
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default:
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printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id);
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return;
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}
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}
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/*-----------------------------------------------------------------------
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*/
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void flash_print_info (flash_info_t *info)
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{
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int i;
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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("missing or unknown FLASH type\n");
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return;
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}
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switch (info->flash_id & 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:
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printf ("28F320J3A (32Mbit = 128K x 32)\n");
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break;
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case FLASH_28F640J3A:
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printf ("28F640J3A (64Mbit = 128K x 64)\n");
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break;
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case FLASH_28F128J3A:
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printf ("28F128J3A (128Mbit = 128K x 128)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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break;
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}
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#if 1
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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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#endif
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return;
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}
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/*-----------------------------------------------------------------------
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*/
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/*-----------------------------------------------------------------------
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*/
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/*
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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_char *addr, flash_info_t *info)
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{
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vu_char manuf, device;
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addr[0] = BS(0x90);
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manuf = BS(addr[0]);
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DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, manuf);
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switch (manuf) {
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case BYTEME(AMD_MANUFACT):
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info->flash_id = FLASH_MAN_AMD;
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break;
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case BYTEME(FUJ_MANUFACT):
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info->flash_id = FLASH_MAN_FUJ;
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break;
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case BYTEME(SST_MANUFACT):
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info->flash_id = FLASH_MAN_SST;
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break;
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case BYTEME(STM_MANUFACT):
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info->flash_id = FLASH_MAN_STM;
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break;
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case BYTEME(INTEL_MANUFACT):
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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] = BS(0xFF); /* restore read mode, (yes, BS is a NOP) */
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return 0; /* no or unknown flash */
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}
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device = BS(addr[2]); /* device ID */
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DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", (ulong)(&addr[1]), device);
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switch (device) {
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case BYTEME(INTEL_ID_28F320J3A):
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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; /* => 4 MB */
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case BYTEME(INTEL_ID_28F640J3A):
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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; /* => 8 MB */
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case BYTEME(INTEL_ID_28F128J3A):
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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; /* => 16 MB */
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default:
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info->flash_id = FLASH_UNKNOWN;
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addr[0] = BS(0xFF); /* restore read mode (yes, a NOP) */
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return 0; /* => no or unknown flash */
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}
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if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
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printf ("** ERROR: sector count %d > max (%d) **\n",
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info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
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info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
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}
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addr[0] = BS(0xFF); /* restore read mode */
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return (info->size);
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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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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", 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_char *addr = (vu_char *)(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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*addr = BS(0x50); /* clear status register */
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*addr = BS(0x20); /* erase setup */
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*addr = BS(0xD0); /* 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 = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
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if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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*addr = BS(0xB0); /* suspend erase */
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*addr = BS(0xFF); /* reset to read mode */
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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 = BS(0xFF); /* reset to read mode */
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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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#define FLASH_WIDTH 1 /* flash bus width in bytes */
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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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uchar *wp = (uchar *)addr;
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int rc;
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if (info->flash_id == FLASH_UNKNOWN) {
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return 4;
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}
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while (cnt > 0) {
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if ((rc = write_data(info, wp, *src)) != 0) {
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return rc;
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}
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wp++;
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src++;
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cnt--;
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}
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return cnt;
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}
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/*-----------------------------------------------------------------------
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* Write a word to Flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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*/
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static int write_data (flash_info_t *info, uchar *dest, uchar data)
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{
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vu_char *addr = (vu_char *)dest;
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ulong status;
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ulong start;
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int flag;
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/* Check if Flash is (sufficiently) erased */
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if ((BS(*addr) & data) != data) {
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return 2;
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}
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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*addr = BS(0x40); /* write setup */
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*addr = data;
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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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start = get_timer (0);
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while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
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if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
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*addr = BS(0xFF); /* restore read mode */
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return 1;
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}
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}
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*addr = BS(0xFF); /* restore read mode */
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return 0;
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}
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/*-----------------------------------------------------------------------
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*/
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