mirror of
https://github.com/AsahiLinux/u-boot
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475 lines
12 KiB
C
475 lines
12 KiB
C
/*
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* (C) Copyright 2006 Embedded Artists AB <www.embeddedartists.com>
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*
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* (C) Copyright 2007 Gary Jennejohn garyj@denx.de
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* Modified to use the routines in cpu/arm720t/lpc2292/flash.c.
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* Heavily modified to support the SMN42 board from Siemens
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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 <asm/byteorder.h>
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#include <asm/arch/hardware.h>
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static unsigned long flash_addr_table[CFG_MAX_FLASH_BANKS] = CFG_FLASH_BANKS_LIST;
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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extern int lpc2292_copy_buffer_to_flash(flash_info_t *, ulong);
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extern int lpc2292_flash_erase(flash_info_t *, int, int);
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extern int lpc2292_write_buff (flash_info_t *, uchar *, ulong, ulong);
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static unsigned long ext_flash_init(void);
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static int ext_flash_erase(flash_info_t *, int, int);
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static int ext_write_buff(flash_info_t *, uchar *, ulong, ulong);
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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 j, k;
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ulong size = 0;
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ulong flashbase = 0;
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flash_info[0].flash_id = PHILIPS_LPC2292;
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flash_info[0].size = 0x003E000; /* 256 - 8 KB */
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flash_info[0].sector_count = 17;
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memset (flash_info[0].protect, 0, 17);
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flashbase = 0x00000000;
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for (j = 0, k = 0; j < 8; j++, k++) {
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flash_info[0].start[k] = flashbase;
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flashbase += 0x00002000;
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}
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for (j = 0; j < 2; j++, k++) {
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flash_info[0].start[k] = flashbase;
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flashbase += 0x00010000;
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}
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for (j = 0; j < 7; j++, k++) {
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flash_info[0].start[k] = flashbase;
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flashbase += 0x00002000;
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}
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size += flash_info[0].size;
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/* Protect monitor and environment sectors */
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flash_protect (FLAG_PROTECT_SET,
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0x0,
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0x0 + monitor_flash_len - 1,
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&flash_info[0]);
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flash_protect (FLAG_PROTECT_SET,
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CFG_ENV_ADDR,
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CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
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&flash_info[0]);
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size += ext_flash_init();
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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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int erased = 0;
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unsigned long j;
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unsigned long count;
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unsigned char *p;
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switch (info->flash_id & FLASH_VENDMASK) {
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case (PHILIPS_LPC2292 & FLASH_VENDMASK):
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printf("Philips: ");
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break;
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case FLASH_MAN_AMD:
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printf("AMD: ");
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break;
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default:
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printf ("Unknown Vendor ");
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case (PHILIPS_LPC2292 & FLASH_TYPEMASK):
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printf("LPC2292 internal flash\n");
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break;
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case FLASH_S29GL128N:
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printf ("S29GL128N (128 Mbit, uniform sector size)\n");
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break;
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default:
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printf("Unknown Chip Type\n");
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return;
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}
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printf (" Size: %ld KB in %d Sectors\n",
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info->size >> 10, 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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if (i < (info->sector_count - 1)) {
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count = info->start[i+1] - info->start[i];
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}
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else {
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count = info->start[0] + info->size - info->start[i];
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}
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p = (unsigned char*)(info->start[i]);
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erased = 1;
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for (j = 0; j < count; j++) {
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if (*p != 0xFF) {
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erased = 0;
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break;
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}
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p++;
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}
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printf (" %08lX%s%s", info->start[i], info->protect[i] ? " RO" : " ",
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erased ? " E" : " ");
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}
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printf ("\n");
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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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switch (info->flash_id & FLASH_TYPEMASK) {
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case (PHILIPS_LPC2292 & FLASH_TYPEMASK):
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return lpc2292_flash_erase(info, s_first, s_last);
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case FLASH_S29GL128N:
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return ext_flash_erase(info, s_first, s_last);
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default:
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return ERR_PROTECTED;
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}
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return ERR_PROTECTED;
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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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switch (info->flash_id & FLASH_TYPEMASK) {
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case (PHILIPS_LPC2292 & FLASH_TYPEMASK):
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return lpc2292_write_buff(info, src, addr, cnt);
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case FLASH_S29GL128N:
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return ext_write_buff(info, src, addr, cnt);
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default:
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return ERR_PROG_ERROR;
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}
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return ERR_PROG_ERROR;
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}
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/*--------------------------------------------------------------------------
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* From here on is code for the external S29GL128N taken from cam5200_flash.c
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*/
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#define CFG_FLASH_WORD_SIZE unsigned short
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static int wait_for_DQ7_32(flash_info_t * info, int sect)
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{
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ulong start, now, last;
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volatile CFG_FLASH_WORD_SIZE *addr =
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(CFG_FLASH_WORD_SIZE *) (info->start[sect]);
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start = get_timer(0);
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last = start;
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while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
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(CFG_FLASH_WORD_SIZE) 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) > 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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return 0;
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}
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int ext_flash_erase(flash_info_t * info, int s_first, int s_last)
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{
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volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
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volatile CFG_FLASH_WORD_SIZE *addr2;
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int flag, prot, sect, l_sect, ret;
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ret = 0;
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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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return 1;
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}
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if (info->flash_id == FLASH_UNKNOWN) {
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printf("Can't erase unknown flash type - 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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if (prot)
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printf("- Warning: %d protected sectors will not be erased!", prot);
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printf("\n");
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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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/* 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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addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
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addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
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addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
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addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
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addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
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addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
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addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030; /* sector erase */
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l_sect = sect;
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/*
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* Wait for each sector to complete, it's more
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* reliable. According to AMD Spec, you must
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* issue all erase commands within a specified
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* timeout. This has been seen to fail, especially
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* if printf()s are included (for debug)!!
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*/
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ret = wait_for_DQ7_32(info, sect);
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if (ret) {
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ret = ERR_PROTECTED;
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break;
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}
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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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/* reset to read mode */
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addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
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addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
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if (ret)
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printf(" error\n");
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else
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printf(" done\n");
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return ret;
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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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CFG_FLASH_WORD_SIZE value;
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ulong base = (ulong) addr;
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volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
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/* Write auto select command: read Manufacturer ID */
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addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
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addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
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addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
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udelay(1000);
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value = addr2[0];
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switch (value) {
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case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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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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return (0); /* no or unknown flash */
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}
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value = addr2[1]; /* device ID */
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switch (value) {
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case (CFG_FLASH_WORD_SIZE)AMD_ID_MIRROR:
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value = addr2[14];
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switch(value) {
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case (CFG_FLASH_WORD_SIZE)AMD_ID_GL128N_2:
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value = addr2[15];
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if (value != (CFG_FLASH_WORD_SIZE)AMD_ID_GL128N_3) {
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info->flash_id = FLASH_UNKNOWN;
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} else {
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info->flash_id += FLASH_S29GL128N;
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info->sector_count = 128;
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info->size = 0x01000000;
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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);
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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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for (i = 0; i < info->sector_count; i++)
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info->start[i] = base + (i * 0x00020000);
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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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addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
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info->protect[i] = addr2[2] & 1;
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}
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/* issue bank reset to return to read mode */
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addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
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return (info->size);
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}
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static unsigned long ext_flash_init(void)
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{
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unsigned long total_b = 0;
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unsigned long size_b[CFG_MAX_FLASH_BANKS];
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int i;
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/* Init: no FLASHes known */
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for (i = 1; i < CFG_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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flash_info[i].sector_count = -1;
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flash_info[i].size = 0;
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/* call flash_get_size() to initialize sector address */
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size_b[i] = flash_get_size((vu_long *) flash_addr_table[i],
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&flash_info[i]);
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flash_info[i].size = size_b[i];
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if (flash_info[i].flash_id == FLASH_UNKNOWN) {
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printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
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i+1, size_b[i], size_b[i] << 20);
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flash_info[i].sector_count = -1;
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flash_info[i].size = 0;
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}
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total_b += flash_info[i].size;
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}
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return total_b;
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}
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static int write_word(flash_info_t * info, ulong dest, ushort data)
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{
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volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
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volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
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volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) &data;
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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 ((*dest2 & *data2) != *data2) {
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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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addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
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addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
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addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
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*dest2 = *data2;
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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 ((*dest2 & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
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(*data2 & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
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if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
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printf("WRITE_TOUT\n");
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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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/*-----------------------------------------------------------------------
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* This is taken from the original flash.c for the LPC2292 SODIMM board
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* and modified to suit.
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*/
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int ext_write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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ushort tmp;
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ulong i;
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uchar* src_org;
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uchar* dst_org;
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ulong cnt_org = cnt;
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int ret = ERR_OK;
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src_org = src;
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dst_org = (uchar*)addr;
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if (addr & 1) { /* if odd address */
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tmp = *((uchar*)(addr - 1)); /* little endian */
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tmp |= (*src << 8);
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if (write_word(info, addr - 1, tmp))
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return ERR_PROG_ERROR;
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addr += 1;
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cnt -= 1;
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src++;
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}
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while (cnt > 1) {
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tmp = ((*(src+1)) << 8) + (*src); /* little endian */
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if (write_word(info, addr, tmp))
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return ERR_PROG_ERROR;
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addr += 2;
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src += 2;
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cnt -= 2;
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}
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if (cnt > 0) {
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tmp = (*((uchar*)(addr + 1))) << 8;
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tmp |= *src;
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if (write_word(info, addr, tmp))
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return ERR_PROG_ERROR;
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}
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for (i = 0; i < cnt_org; i++) {
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if (*dst_org != *src_org) {
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printf("Write failed. Byte %lX differs\n", i);
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ret = ERR_PROG_ERROR;
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break;
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}
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dst_org++;
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src_org++;
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}
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return ret;
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}
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