471 lines
11 KiB
C
471 lines
11 KiB
C
/*
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* (C) Copyright 2002
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* Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
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*
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* (C) Copyright 2000-2004
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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 <linux/byteorder/swab.h>
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#define SWAP(x) __swab32(x)
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/* Functions */
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static ulong flash_get_size (vu_long *addr, flash_info_t *info);
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static int write_word (flash_info_t *info, ulong dest, ulong data);
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static void flash_get_offsets (ulong base, flash_info_t *info);
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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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int i;
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ulong size = 0;
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for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
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switch (i) {
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case 0:
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flash_get_size ((long *) PHYS_FLASH_1, &flash_info[i]);
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flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
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break;
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case 1:
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flash_get_size ((long *) PHYS_FLASH_2, &flash_info[i]);
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flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
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break;
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default:
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panic ("configured too many flash banks!\n");
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break;
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}
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size += flash_info[i].size;
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}
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/* Protect monitor and environment sectors */
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flash_protect ( FLAG_PROTECT_SET,CFG_FLASH_BASE,CFG_FLASH_BASE + monitor_flash_len - 1,&flash_info[0] );
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flash_protect ( FLAG_PROTECT_SET,CFG_ENV_ADDR,CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
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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) return;
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if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
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for (i = 0; i < info->sector_count; i++) {
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info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
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info->protect[i] = 0;
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}
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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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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_AMLV640U: printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
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break;
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case FLASH_S29GL064M: printf ("S29GL064M (64Mbit, top boot sector size)\n");
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break;
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default: printf ("Unknown Chip Type\n");
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break;
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}
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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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return;
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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_long *addr, flash_info_t *info)
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{
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short i;
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ulong value;
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ulong base = (ulong)addr;
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/* Write auto select command: read Manufacturer ID */
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addr[0x0555] = 0x00AA00AA;
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addr[0x02AA] = 0x00550055;
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addr[0x0555] = 0x00900090;
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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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debug ("Manufacturer: AMD\n");
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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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debug ("Manufacturer: FUJITSU\n");
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info->flash_id = FLASH_MAN_FUJ;
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break;
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default:
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debug ("Manufacturer: *** unknown ***\n");
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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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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_MIRROR:
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debug ("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n",
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addr[14], addr[15]);
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switch(addr[14]) {
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case AMD_ID_LV640U_2:
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if (addr[15] != AMD_ID_LV640U_3) {
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debug ("Chip: AMLV640U -> unknown\n");
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info->flash_id = FLASH_UNKNOWN;
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} else {
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debug ("Chip: AMLV640U\n");
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info->flash_id += FLASH_AMLV640U;
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info->sector_count = 128;
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info->size = 0x01000000;
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}
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break; /* => 16 MB */
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case AMD_ID_GL064MT_2:
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if (addr[15] != AMD_ID_GL064MT_3) {
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debug ("Chip: S29GL064M-R3 -> unknown\n");
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info->flash_id = FLASH_UNKNOWN;
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} else {
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debug ("Chip: S29GL064M-R3\n");
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info->flash_id += FLASH_S29GL064M;
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info->sector_count = 128;
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info->size = 0x01000000;
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}
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break; /* => 16 MB */
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default:
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debug ("Chip: *** unknown ***\n");
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info->flash_id = FLASH_UNKNOWN;
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break;
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}
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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return (0); /* => no or unknown flash */
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}
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/* set up sector start address table */
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switch (value) {
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case AMD_ID_MIRROR:
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switch (info->flash_id & FLASH_TYPEMASK) {
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/* only known types here - no default */
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case FLASH_AMLV128U:
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case FLASH_AMLV640U:
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case FLASH_AMLV320U:
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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 += 0x20000;
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}
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break;
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case FLASH_AMLV320B:
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for (i = 0; i < info->sector_count; i++) {
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info->start[i] = base;
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/*
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* The first 8 sectors are 8 kB,
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* all the other ones are 64 kB
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*/
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base += (i < 8)
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? 2 * ( 8 << 10)
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: 2 * (64 << 10);
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}
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break;
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}
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break;
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default:
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return (0);
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break;
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}
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#if 0
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/* check for protected sectors */
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for (i = 0; i < info->sector_count; i++) {
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/* read sector protection at sector address, (A7 .. A0) = 0x02 */
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/* D0 = 1 if protected */
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addr = (volatile unsigned long *)(info->start[i]);
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info->protect[i] = addr[2] & 1;
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}
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#endif
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/*
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* Prevent writes to uninitialized FLASH.
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*/
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if (info->flash_id != FLASH_UNKNOWN) {
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addr = (volatile unsigned long *)info->start[0];
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*addr = 0x00F000F0; /* reset bank */
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}
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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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vu_long *addr = (vu_long*)(info->start[0]);
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int flag, prot, sect, l_sect;
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ulong start, now, last;
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debug ("flash_erase: first: %d last: %d\n", s_first, s_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_UNKNOWN) ||
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(info->flash_id > FLASH_AMD_COMP)) {
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printf ("Can't erase unknown flash type %08lx - aborted\n",
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info->flash_id);
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return 1;
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}
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prot = 0;
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for (sect=s_first; sect<=s_last; ++sect) {
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if (info->protect[sect]) {
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prot++;
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}
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}
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if (prot) {
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printf ("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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printf ("\n");
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}
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l_sect = -1;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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addr[0x0555] = 0x00AA00AA;
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addr[0x02AA] = 0x00550055;
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addr[0x0555] = 0x00800080;
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addr[0x0555] = 0x00AA00AA;
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addr[0x02AA] = 0x00550055;
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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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addr = (vu_long*)(info->start[sect]);
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addr[0] = 0x00300030;
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l_sect = sect;
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}
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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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/* wait at least 80us - let's wait 1 ms */
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udelay (1000);
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/*
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* We wait for the last triggered sector
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*/
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if (l_sect < 0)
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goto DONE;
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start = get_timer (0);
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last = start;
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addr = (vu_long*)(info->start[l_sect]);
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while ((addr[0] & 0x00800080) != 0x00800080) {
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if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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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) > 100000) { /* 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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DONE:
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/* reset to read mode */
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addr = (volatile unsigned long *)info->start[0];
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addr[0] = 0x00F000F0; /* reset bank */
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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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*/
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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 i, l, 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);
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}
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for (; i<4 && cnt>0; ++i) {
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data = (data << 8) | *src++;
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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);
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}
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if ((rc = write_word(info, wp, SWAP(data))) != 0) {
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return (rc);
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}
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wp += 4;
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}
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/*
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* handle word aligned part
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*/
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while (cnt >= 4) {
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data = 0;
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for (i=0; i<4; ++i) {
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data = (data << 8) | *src++;
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}
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if ((rc = write_word(info, wp, SWAP(data))) != 0) {
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return (rc);
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}
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wp += 4;
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cnt -= 4;
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}
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if (cnt == 0) {
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return (0);
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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++;
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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);
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}
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return (write_word(info, wp, SWAP(data)));
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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_word (flash_info_t *info, ulong dest, ulong data)
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{
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vu_long *addr = (vu_long*)(info->start[0]);
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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 ((*((vu_long *)dest) & 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[0x0555] = 0x00AA00AA;
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addr[0x02AA] = 0x00550055;
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addr[0x0555] = 0x00A000A0;
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*((vu_long *)dest) = 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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/* data polling for D7 */
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start = get_timer (0);
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while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
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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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return (0);
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}
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