383 lines
8.5 KiB
C
383 lines
8.5 KiB
C
/*
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* (C) Copyright 2000-2010
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Andreas Heppel <aheppel@sysgo.de>
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*
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* (C) Copyright 2008 Atmel Corporation
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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 <environment.h>
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#include <malloc.h>
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#include <spi_flash.h>
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#include <search.h>
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#include <errno.h>
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#ifndef CONFIG_ENV_SPI_BUS
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# define CONFIG_ENV_SPI_BUS 0
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#endif
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#ifndef CONFIG_ENV_SPI_CS
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# define CONFIG_ENV_SPI_CS 0
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#endif
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#ifndef CONFIG_ENV_SPI_MAX_HZ
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# define CONFIG_ENV_SPI_MAX_HZ 1000000
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#endif
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#ifndef CONFIG_ENV_SPI_MODE
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# define CONFIG_ENV_SPI_MODE SPI_MODE_3
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#endif
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#ifdef CONFIG_ENV_OFFSET_REDUND
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static ulong env_offset = CONFIG_ENV_OFFSET;
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static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
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#define ACTIVE_FLAG 1
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#define OBSOLETE_FLAG 0
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#endif /* CONFIG_ENV_OFFSET_REDUND */
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DECLARE_GLOBAL_DATA_PTR;
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/* references to names in env_common.c */
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extern uchar default_environment[];
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char * env_name_spec = "SPI Flash";
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env_t *env_ptr;
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static struct spi_flash *env_flash;
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uchar env_get_char_spec(int index)
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{
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return *((uchar *)(gd->env_addr + index));
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}
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#if defined(CONFIG_ENV_OFFSET_REDUND)
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int saveenv(void)
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{
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env_t env_new;
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ssize_t len;
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char *res;
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u32 saved_size, saved_offset;
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char *saved_buffer = NULL;
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u32 sector = 1;
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int ret;
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char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
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if (!env_flash) {
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env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
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CONFIG_ENV_SPI_CS,
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CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
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if (!env_flash) {
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set_default_env("!spi_flash_probe() failed");
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return 1;
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}
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}
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res = (char *)&env_new.data;
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len = hexport('\0', &res, ENV_SIZE);
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if (len < 0) {
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error("Cannot export environment: errno = %d\n", errno);
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return 1;
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}
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env_new.crc = crc32(0, env_new.data, ENV_SIZE);
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env_new.flags = ACTIVE_FLAG;
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if (gd->env_valid == 1) {
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env_new_offset = CONFIG_ENV_OFFSET_REDUND;
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env_offset = CONFIG_ENV_OFFSET;
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} else {
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env_new_offset = CONFIG_ENV_OFFSET;
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env_offset = CONFIG_ENV_OFFSET_REDUND;
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}
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/* Is the sector larger than the env (i.e. embedded) */
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if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
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saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
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saved_offset = env_new_offset + CONFIG_ENV_SIZE;
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saved_buffer = malloc(saved_size);
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if (!saved_buffer) {
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ret = 1;
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goto done;
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}
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ret = spi_flash_read(env_flash, saved_offset,
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saved_size, saved_buffer);
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if (ret)
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goto done;
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}
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if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
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sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
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if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
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sector++;
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}
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puts("Erasing SPI flash...");
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ret = spi_flash_erase(env_flash, env_new_offset,
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sector * CONFIG_ENV_SECT_SIZE);
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if (ret)
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goto done;
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puts("Writing to SPI flash...");
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ret = spi_flash_write(env_flash, env_new_offset,
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CONFIG_ENV_SIZE, &env_new);
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if (ret)
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goto done;
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if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
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ret = spi_flash_write(env_flash, saved_offset,
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saved_size, saved_buffer);
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if (ret)
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goto done;
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}
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ret = spi_flash_write(env_flash,
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env_offset + offsetof(env_t, flags),
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sizeof(env_new.flags), &flag);
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if (ret)
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goto done;
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puts("done\n");
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gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
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printf("Valid environment: %d\n", gd->env_valid);
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done:
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if (saved_buffer)
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free(saved_buffer);
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return ret;
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}
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void env_relocate_spec(void)
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{
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int ret;
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int crc1_ok = 0, crc2_ok = 0;
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env_t *tmp_env1 = NULL;
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env_t *tmp_env2 = NULL;
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env_t *ep = NULL;
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uchar flag1, flag2;
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/* current_env is set only in case both areas are valid! */
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int current_env = 0;
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tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
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tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
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if (!tmp_env1 || !tmp_env2) {
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free(tmp_env1);
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free(tmp_env2);
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set_default_env("!malloc() failed");
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return;
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}
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env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
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CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
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if (!env_flash) {
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set_default_env("!spi_flash_probe() failed");
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return;
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}
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ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
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CONFIG_ENV_SIZE, tmp_env1);
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if (ret) {
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set_default_env("!spi_flash_read() failed");
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goto err_read;
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}
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if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
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crc1_ok = 1;
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flag1 = tmp_env1->flags;
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ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
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CONFIG_ENV_SIZE, tmp_env2);
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if (!ret) {
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if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc)
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crc2_ok = 1;
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flag2 = tmp_env2->flags;
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}
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if (!crc1_ok && !crc2_ok) {
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free(tmp_env1);
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free(tmp_env2);
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set_default_env("!bad CRC");
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return;
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} else if (crc1_ok && !crc2_ok) {
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gd->env_valid = 1;
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ep = tmp_env1;
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} else if (!crc1_ok && crc2_ok) {
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gd->env_valid = 1;
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} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
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gd->env_valid = 1;
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} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
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gd->env_valid = 2;
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} else if (flag1 == flag2) {
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gd->env_valid = 2;
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} else if (flag1 == 0xFF) {
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gd->env_valid = 2;
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} else {
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/*
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* this differs from code in env_flash.c, but I think a sane
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* default path is desirable.
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*/
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gd->env_valid = 2;
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}
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free(env_ptr);
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if (gd->env_valid == 1)
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ep = tmp_env1;
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else
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ep = tmp_env2;
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ret = env_import((char *)ep, 0);
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if (!ret) {
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error("Cannot import environment: errno = %d\n", errno);
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set_default_env("env_import failed");
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}
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err_read:
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spi_flash_free(env_flash);
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env_flash = NULL;
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out:
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if (tmp_env1)
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free(tmp_env1);
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if (tmp_env2)
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free(tmp_env2);
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free(tmp_env1);
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free(tmp_env2);
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return;
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}
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#else
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int saveenv(void)
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{
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u32 saved_size, saved_offset;
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char *saved_buffer = NULL;
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u32 sector = 1;
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int ret = 1;
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env_t env_new;
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char *res;
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ssize_t len;
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if (!env_flash) {
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env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
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CONFIG_ENV_SPI_CS,
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CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
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if (!env_flash) {
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set_default_env("!spi_flash_probe() failed");
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return 1;
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}
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}
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/* Is the sector larger than the env (i.e. embedded) */
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if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
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saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
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saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
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saved_buffer = malloc(saved_size);
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if (!saved_buffer) {
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goto done;
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}
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ret = spi_flash_read(env_flash, saved_offset,
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saved_size, saved_buffer);
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if (ret)
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goto done;
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}
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if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
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sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
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if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
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sector++;
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}
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res = (char *)&env_new.data;
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len = hexport('\0', &res, ENV_SIZE);
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if (len < 0) {
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error("Cannot export environment: errno = %d\n", errno);
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goto done;
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}
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env_new.crc = crc32(0, env_new.data, ENV_SIZE);
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puts("Erasing SPI flash...");
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ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
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sector * CONFIG_ENV_SECT_SIZE);
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if (ret)
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goto done;
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puts("Writing to SPI flash...");
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ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
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CONFIG_ENV_SIZE, &env_new);
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if (ret)
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goto done;
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if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
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ret = spi_flash_write(env_flash, saved_offset,
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saved_size, saved_buffer);
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if (ret)
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goto done;
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}
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ret = 0;
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puts("done\n");
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done:
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if (saved_buffer)
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free(saved_buffer);
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return ret;
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}
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void env_relocate_spec(void)
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{
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char buf[CONFIG_ENV_SIZE];
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int ret;
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env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
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CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
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if (!env_flash) {
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set_default_env("!spi_flash_probe() failed");
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return;
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}
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ret = spi_flash_read(env_flash,
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CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
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if (ret) {
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set_default_env("!spi_flash_read() failed");
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goto out;
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}
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ret = env_import(buf, 1);
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if (ret)
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gd->env_valid = 1;
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out:
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spi_flash_free(env_flash);
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env_flash = NULL;
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}
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#endif
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int env_init(void)
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{
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/* SPI flash isn't usable before relocation */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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