mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-26 22:52:18 +00:00
53504a2789
Change if (ok) {
bunch of stuff
} else {
error
}
to
if (error) {
get out
}
proceed with bunch of stuff
Plus a few whitespace cleanups.
Signed-off-by: Scott Wood <scottwood@freescale.com>
416 lines
10 KiB
C
416 lines
10 KiB
C
/*
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* (C) Copyright 2008
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* Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
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*
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* (C) Copyright 2004
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* Jian Zhang, Texas Instruments, jzhang@ti.com.
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* (C) Copyright 2000-2006
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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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* 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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/* #define DEBUG */
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <nand.h>
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#include <asm/errno.h>
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#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
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#define CMD_SAVEENV
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#elif defined(CONFIG_ENV_OFFSET_REDUND)
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#error Cannot use CONFIG_ENV_OFFSET_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
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#endif
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#if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
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#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
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#endif
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#ifndef CONFIG_ENV_RANGE
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#define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
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#endif
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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 = "NAND";
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#if defined(ENV_IS_EMBEDDED)
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extern uchar environment[];
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env_t *env_ptr = (env_t *)(&environment[0]);
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#elif defined(CONFIG_NAND_ENV_DST)
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env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST;
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#else /* ! ENV_IS_EMBEDDED */
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env_t *env_ptr = 0;
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#endif /* ENV_IS_EMBEDDED */
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/* local functions */
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#if !defined(ENV_IS_EMBEDDED)
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static void use_default(void);
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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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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/* this is called before nand_init()
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* so we can't read Nand to validate env data.
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* Mark it OK for now. env_relocate() in env_common.c
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* will call our relocate function which does the real
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* validation.
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*
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* When using a NAND boot image (like sequoia_nand), the environment
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* can be embedded or attached to the U-Boot image in NAND flash. This way
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* the SPL loads not only the U-Boot image from NAND but also the
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* environment.
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*/
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int env_init(void)
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{
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#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
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int crc1_ok = 0, crc2_ok = 0;
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env_t *tmp_env1;
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#ifdef CONFIG_ENV_OFFSET_REDUND
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env_t *tmp_env2;
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tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
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crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
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#endif
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tmp_env1 = env_ptr;
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crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
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if (!crc1_ok && !crc2_ok) {
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gd->env_addr = 0;
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gd->env_valid = 0;
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return 0;
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} else if (crc1_ok && !crc2_ok) {
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gd->env_valid = 1;
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}
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#ifdef CONFIG_ENV_OFFSET_REDUND
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else if (!crc1_ok && crc2_ok) {
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gd->env_valid = 2;
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} else {
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/* both ok - check serial */
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if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
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gd->env_valid = 2;
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else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
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gd->env_valid = 1;
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else if(tmp_env1->flags > tmp_env2->flags)
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gd->env_valid = 1;
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else if(tmp_env2->flags > tmp_env1->flags)
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gd->env_valid = 2;
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else /* flags are equal - almost impossible */
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gd->env_valid = 1;
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}
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if (gd->env_valid == 2)
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env_ptr = tmp_env2;
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else
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#endif
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if (gd->env_valid == 1)
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env_ptr = tmp_env1;
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gd->env_addr = (ulong)env_ptr->data;
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#else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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#endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
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return (0);
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}
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#ifdef CMD_SAVEENV
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/*
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* The legacy NAND code saved the environment in the first NAND device i.e.,
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* nand_dev_desc + 0. This is also the behaviour using the new NAND code.
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*/
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int writeenv(size_t offset, u_char *buf)
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{
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size_t end = offset + CONFIG_ENV_RANGE;
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size_t amount_saved = 0;
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size_t blocksize, len;
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u_char *char_ptr;
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blocksize = nand_info[0].erasesize;
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len = min(blocksize, CONFIG_ENV_SIZE);
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while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
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if (nand_block_isbad(&nand_info[0], offset)) {
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offset += blocksize;
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} else {
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char_ptr = &buf[amount_saved];
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if (nand_write(&nand_info[0], offset, &len,
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char_ptr))
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return 1;
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offset += blocksize;
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amount_saved += len;
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}
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}
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if (amount_saved != CONFIG_ENV_SIZE)
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return 1;
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return 0;
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}
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#ifdef CONFIG_ENV_OFFSET_REDUND
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int saveenv(void)
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{
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int ret = 0;
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nand_erase_options_t nand_erase_options;
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env_ptr->flags++;
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nand_erase_options.length = CONFIG_ENV_RANGE;
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nand_erase_options.quiet = 0;
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nand_erase_options.jffs2 = 0;
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nand_erase_options.scrub = 0;
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if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
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return 1;
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if(gd->env_valid == 1) {
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puts ("Erasing redundant Nand...\n");
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nand_erase_options.offset = CONFIG_ENV_OFFSET_REDUND;
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if (nand_erase_opts(&nand_info[0], &nand_erase_options))
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return 1;
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puts ("Writing to redundant Nand... ");
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ret = writeenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) env_ptr);
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} else {
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puts ("Erasing Nand...\n");
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nand_erase_options.offset = CONFIG_ENV_OFFSET;
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if (nand_erase_opts(&nand_info[0], &nand_erase_options))
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return 1;
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puts ("Writing to Nand... ");
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ret = writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
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}
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if (ret) {
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puts("FAILED!\n");
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return 1;
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}
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puts ("done\n");
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gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
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return ret;
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}
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#else /* ! CONFIG_ENV_OFFSET_REDUND */
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int saveenv(void)
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{
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int ret = 0;
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nand_erase_options_t nand_erase_options;
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nand_erase_options.length = CONFIG_ENV_RANGE;
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nand_erase_options.quiet = 0;
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nand_erase_options.jffs2 = 0;
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nand_erase_options.scrub = 0;
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nand_erase_options.offset = CONFIG_ENV_OFFSET;
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if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
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return 1;
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puts ("Erasing Nand...\n");
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if (nand_erase_opts(&nand_info[0], &nand_erase_options))
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return 1;
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puts ("Writing to Nand... ");
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if (writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr)) {
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puts("FAILED!\n");
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return 1;
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}
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puts ("done\n");
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return ret;
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}
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#endif /* CONFIG_ENV_OFFSET_REDUND */
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#endif /* CMD_SAVEENV */
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int readenv (size_t offset, u_char * buf)
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{
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size_t end = offset + CONFIG_ENV_RANGE;
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size_t amount_loaded = 0;
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size_t blocksize, len;
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u_char *char_ptr;
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blocksize = nand_info[0].erasesize;
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len = min(blocksize, CONFIG_ENV_SIZE);
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while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
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if (nand_block_isbad(&nand_info[0], offset)) {
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offset += blocksize;
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} else {
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char_ptr = &buf[amount_loaded];
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if (nand_read(&nand_info[0], offset, &len, char_ptr))
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return 1;
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offset += blocksize;
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amount_loaded += len;
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}
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}
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if (amount_loaded != CONFIG_ENV_SIZE)
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return 1;
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return 0;
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}
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#ifdef CONFIG_ENV_OFFSET_OOB
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int get_nand_env_oob(nand_info_t *nand, unsigned long *result)
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{
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struct mtd_oob_ops ops;
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uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
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int ret;
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ops.datbuf = NULL;
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ops.mode = MTD_OOB_AUTO;
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ops.ooboffs = 0;
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ops.ooblen = ENV_OFFSET_SIZE;
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ops.oobbuf = (void *) oob_buf;
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ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
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if (ret) {
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printf("error reading OOB block 0\n");
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return ret;
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}
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if (oob_buf[0] == ENV_OOB_MARKER) {
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*result = oob_buf[1] * nand->erasesize;
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} else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
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*result = oob_buf[1];
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} else {
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printf("No dynamic environment marker in OOB block 0\n");
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return -ENOENT;
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}
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return 0;
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}
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#endif
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#ifdef CONFIG_ENV_OFFSET_REDUND
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void env_relocate_spec (void)
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{
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#if !defined(ENV_IS_EMBEDDED)
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int crc1_ok = 0, crc2_ok = 0;
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env_t *tmp_env1, *tmp_env2;
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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 == NULL) || (tmp_env2 == NULL)) {
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puts("Can't allocate buffers for environment\n");
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free (tmp_env1);
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free (tmp_env2);
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return use_default();
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}
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if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
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puts("No Valid Environment Area Found\n");
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if (readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
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puts("No Valid Reundant Environment Area Found\n");
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crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
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crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
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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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return use_default();
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} else if(crc1_ok && !crc2_ok)
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gd->env_valid = 1;
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else if(!crc1_ok && crc2_ok)
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gd->env_valid = 2;
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else {
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/* both ok - check serial */
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if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
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gd->env_valid = 2;
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else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
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gd->env_valid = 1;
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else if(tmp_env1->flags > tmp_env2->flags)
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gd->env_valid = 1;
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else if(tmp_env2->flags > tmp_env1->flags)
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gd->env_valid = 2;
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else /* flags are equal - almost impossible */
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gd->env_valid = 1;
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}
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free(env_ptr);
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if(gd->env_valid == 1) {
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env_ptr = tmp_env1;
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free(tmp_env2);
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} else {
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env_ptr = tmp_env2;
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free(tmp_env1);
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}
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#endif /* ! ENV_IS_EMBEDDED */
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}
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#else /* ! CONFIG_ENV_OFFSET_REDUND */
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/*
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* The legacy NAND code saved the environment in the first NAND device i.e.,
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* nand_dev_desc + 0. This is also the behaviour using the new NAND code.
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*/
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void env_relocate_spec (void)
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{
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#if !defined(ENV_IS_EMBEDDED)
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int ret;
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#if defined(CONFIG_ENV_OFFSET_OOB)
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ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
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/* If unable to read environment offset from NAND OOB then fall through
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* to the normal environment reading code below
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*/
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if (!ret)
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printf("Found Environment offset in OOB..\n");
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else
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return use_default();
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#endif
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ret = readenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
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if (ret)
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return use_default();
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if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
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return use_default();
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#endif /* ! ENV_IS_EMBEDDED */
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}
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#endif /* CONFIG_ENV_OFFSET_REDUND */
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#if !defined(ENV_IS_EMBEDDED)
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static void use_default()
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{
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puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
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set_default_env();
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}
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#endif
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