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250 lines
6.1 KiB
C
250 lines
6.1 KiB
C
/*
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* (C) Copyright 2006 Embedded Artists AB <www.embeddedartists.com>
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*
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* Modified to remove all but the IAP-command related code by
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* Gary Jennejohn <garyj@denx.de>
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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/arch/hardware.h>
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/* IAP commands use 32 bytes at the top of CPU internal sram, we
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use 512 bytes below that */
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#define COPY_BUFFER_LOCATION 0x40003de0
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#define IAP_LOCATION 0x7ffffff1
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#define IAP_CMD_PREPARE 50
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#define IAP_CMD_COPY 51
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#define IAP_CMD_ERASE 52
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#define IAP_CMD_CHECK 53
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#define IAP_CMD_ID 54
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#define IAP_CMD_VERSION 55
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#define IAP_CMD_COMPARE 56
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#define IAP_RET_CMD_SUCCESS 0
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static unsigned long command[5];
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static unsigned long result[2];
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extern void iap_entry(unsigned long * command, unsigned long * result);
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/*-----------------------------------------------------------------------
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*
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*/
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static int get_flash_sector(flash_info_t * info, ulong flash_addr)
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{
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int i;
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for(i = 1; i < (info->sector_count); i++) {
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if (flash_addr < (info->start[i]))
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break;
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}
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return (i-1);
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}
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/*-----------------------------------------------------------------------
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* This function assumes that flash_addr is aligned on 512 bytes boundary
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* in flash. This function also assumes that prepare have been called
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* for the sector in question.
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*/
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int lpc2292_copy_buffer_to_flash(flash_info_t * info, ulong flash_addr)
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{
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int first_sector;
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int last_sector;
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first_sector = get_flash_sector(info, flash_addr);
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last_sector = get_flash_sector(info, flash_addr + 512 - 1);
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/* prepare sectors for write */
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command[0] = IAP_CMD_PREPARE;
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command[1] = first_sector;
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command[2] = last_sector;
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iap_entry(command, result);
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if (result[0] != IAP_RET_CMD_SUCCESS) {
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printf("IAP prepare failed\n");
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return ERR_PROG_ERROR;
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}
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command[0] = IAP_CMD_COPY;
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command[1] = flash_addr;
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command[2] = COPY_BUFFER_LOCATION;
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command[3] = 512;
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command[4] = CONFIG_SYS_SYS_CLK_FREQ >> 10;
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iap_entry(command, result);
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if (result[0] != IAP_RET_CMD_SUCCESS) {
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printf("IAP copy failed\n");
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return 1;
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}
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return 0;
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}
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/*-----------------------------------------------------------------------
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*/
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int lpc2292_flash_erase (flash_info_t * info, int s_first, int s_last)
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{
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int flag;
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int prot;
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int sect;
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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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return ERR_PROTECTED;
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flag = disable_interrupts();
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printf ("Erasing %d sectors starting at sector %2d.\n"
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"This make take some time ... ",
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s_last - s_first + 1, s_first);
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command[0] = IAP_CMD_PREPARE;
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command[1] = s_first;
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command[2] = s_last;
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iap_entry(command, result);
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if (result[0] != IAP_RET_CMD_SUCCESS) {
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printf("IAP prepare failed\n");
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return ERR_PROTECTED;
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}
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command[0] = IAP_CMD_ERASE;
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command[1] = s_first;
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command[2] = s_last;
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command[3] = CONFIG_SYS_SYS_CLK_FREQ >> 10;
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iap_entry(command, result);
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if (result[0] != IAP_RET_CMD_SUCCESS) {
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printf("IAP erase failed\n");
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return ERR_PROTECTED;
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}
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if (flag)
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enable_interrupts();
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return ERR_OK;
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}
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int lpc2292_write_buff (flash_info_t * info, uchar * src, ulong addr,
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ulong cnt)
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{
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int first_copy_size;
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int last_copy_size;
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int first_block;
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int last_block;
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int nbr_mid_blocks;
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uchar memmap_value;
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ulong i;
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uchar* src_org;
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uchar* dst_org;
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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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first_block = addr / 512;
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last_block = (addr + cnt) / 512;
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nbr_mid_blocks = last_block - first_block - 1;
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first_copy_size = 512 - (addr % 512);
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last_copy_size = (addr + cnt) % 512;
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debug("\ncopy first block: (1) %lX -> %lX 0x200 bytes, "
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"(2) %lX -> %lX 0x%X bytes, (3) %lX -> %lX 0x200 bytes\n",
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(ulong)(first_block * 512),
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(ulong)COPY_BUFFER_LOCATION,
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(ulong)src,
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(ulong)(COPY_BUFFER_LOCATION + 512 - first_copy_size),
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first_copy_size,
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(ulong)COPY_BUFFER_LOCATION,
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(ulong)(first_block * 512));
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/* copy first block */
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memcpy((void*)COPY_BUFFER_LOCATION,
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(void*)(first_block * 512), 512);
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memcpy((void*)(COPY_BUFFER_LOCATION + 512 - first_copy_size),
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src, first_copy_size);
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lpc2292_copy_buffer_to_flash(info, first_block * 512);
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src += first_copy_size;
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addr += first_copy_size;
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/* copy middle blocks */
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for (i = 0; i < nbr_mid_blocks; i++) {
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debug("copy middle block: %lX -> %lX 512 bytes, "
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"%lX -> %lX 512 bytes\n",
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(ulong)src,
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(ulong)COPY_BUFFER_LOCATION,
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(ulong)COPY_BUFFER_LOCATION,
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(ulong)addr);
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memcpy((void*)COPY_BUFFER_LOCATION, src, 512);
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lpc2292_copy_buffer_to_flash(info, addr);
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src += 512;
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addr += 512;
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}
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if (last_copy_size > 0) {
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debug("copy last block: (1) %lX -> %lX 0x200 bytes, "
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"(2) %lX -> %lX 0x%X bytes, (3) %lX -> %lX x200 bytes\n",
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(ulong)(last_block * 512),
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(ulong)COPY_BUFFER_LOCATION,
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(ulong)src,
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(ulong)(COPY_BUFFER_LOCATION),
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last_copy_size,
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(ulong)COPY_BUFFER_LOCATION,
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(ulong)addr);
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/* copy last block */
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memcpy((void*)COPY_BUFFER_LOCATION,
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(void*)(last_block * 512), 512);
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memcpy((void*)COPY_BUFFER_LOCATION,
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src, last_copy_size);
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lpc2292_copy_buffer_to_flash(info, addr);
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}
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/* verify write */
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memmap_value = GET8(MEMMAP);
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disable_interrupts();
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PUT8(MEMMAP, 01); /* we must make sure that initial 64
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bytes are taken from flash when we
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do the compare */
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for (i = 0; i < cnt; 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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PUT8(MEMMAP, memmap_value);
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enable_interrupts();
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return ret;
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}
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