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Patch by Jian Zhang, 20 May 2004: 

add support for environment in NAND flash
This commit is contained in:
wdenk 2004-06-09 14:58:14 +00:00
parent c3c7f861ae
commit 13a5695b7c
7 changed files with 193 additions and 5 deletions
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3
CHANGELOG
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@ -2,6 +2,9 @@
Changes since U-Boot 1.1.1:
======================================================================
* Patch by Jian Zhang, 20 May 2004:
add support for environment in NAND flash
* Patch by Yuli Barcohen, 20 May 2004:
Add support for Interphase iSPAN boards.

10
README
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@ -1827,6 +1827,16 @@ to save the current settings.
environment area within the total memory of your DataFlash placed
at the specified address.
- CFG_ENV_IS_IN_NAND:
Define this if you have a NAND device which you want to use
for the environment.
- CFG_ENV_OFFSET:
- CFG_ENV_SIZE:
These two #defines specify the offset and size of the environment
area within the first NAND device.
- CFG_SPI_INIT_OFFSET

2
common/Makefile
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@ -42,7 +42,7 @@ COBJS = main.o ACEX1K.o altera.o bedbug.o \
cmd_reginfo.o cmd_reiser.o cmd_scsi.o cmd_spi.o cmd_usb.o cmd_vfd.o \
command.o console.o devices.o dlmalloc.o docecc.o \
environment.o env_common.o \
env_dataflash.o env_flash.o env_eeprom.o env_nvram.o env_nowhere.o exports.o \
env_nand.o env_dataflash.o env_flash.o env_eeprom.o env_nvram.o env_nowhere.o exports.o \
flash.o fpga.o \
hush.o kgdb.o lists.o lynxkdi.o memsize.o miiphybb.o miiphyutil.o \
s_record.o soft_i2c.o soft_spi.o spartan2.o \

8
common/cmd_nand.c
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@ -70,10 +70,10 @@ struct nand_oob_config {
* Function Prototypes
*/
static void nand_print(struct nand_chip *nand);
static int nand_rw (struct nand_chip* nand, int cmd,
int nand_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf);
static int nand_erase(struct nand_chip* nand, size_t ofs, size_t len, int clean);
int nand_erase(struct nand_chip* nand, size_t ofs, size_t len, int clean);
static int nand_read_ecc(struct nand_chip *nand, size_t start, size_t len,
size_t * retlen, u_char *buf, u_char *ecc_code);
static int nand_write_ecc (struct nand_chip* nand, size_t to, size_t len,
@ -429,7 +429,7 @@ static void nand_print_bad(struct nand_chip* nand)
* 3: NANDRW_READ | NANDRW_JFFS2 read, data all 0xff for bad blocks
* 7: NANDRW_READ | NANDRW_JFFS2 | NANDRW_JFFS2_SKIP read, skip bad blocks
*/
static int nand_rw (struct nand_chip* nand, int cmd,
int nand_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf)
{
@ -1304,7 +1304,7 @@ static int nand_write_oob(struct nand_chip* nand, size_t ofs, size_t len,
}
static int nand_erase(struct nand_chip* nand, size_t ofs, size_t len, int clean)
int nand_erase(struct nand_chip* nand, size_t ofs, size_t len, int clean)
{
/* This is defined as a structure so it will work on any system
* using native endian jffs2 (the default).

1
common/cmd_nvedit.c
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@ -53,6 +53,7 @@
!defined(CFG_ENV_IS_IN_EEPROM) && \
!defined(CFG_ENV_IS_IN_FLASH) && \
!defined(CFG_ENV_IS_IN_DATAFLASH) && \
!defined(CFG_ENV_IS_IN_NAND) && \
!defined(CFG_ENV_IS_NOWHERE)
# error Define one of CFG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|NOWHERE}
#endif

3
common/env_common.c
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@ -139,6 +139,9 @@ uchar default_environment[] = {
"\0"
};
#if defined(CFG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */
int default_environment_size = sizeof(default_environment);
#endif
void env_crc_update (void)
{

171
common/env_nand.c Normal file
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@ -0,0 +1,171 @@
/*
* (C) Copyright 2004
* Jian Zhang, Texas Instruments, jzhang@ti.com.
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/* #define DEBUG */
#include <common.h>
#if defined(CFG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <linux/mtd/nand.h>
#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_NAND)) == (CFG_CMD_ENV|CFG_CMD_NAND))
#define CMD_SAVEENV
#endif
#if defined(CFG_ENV_SIZE_REDUND)
#error CFG_ENV_SIZE_REDUND not supported yet
#endif
#if defined(CFG_ENV_ADDR_REDUND)
#error CFG_ENV_ADDR_REDUND and CFG_ENV_IS_IN_NAND not supported yet
#endif
#ifdef CONFIG_INFERNO
#error CONFIG_INFERNO not supported yet
#endif
/* references to names in cmd_nand.c */
#define NANDRW_READ 0x01
#define NANDRW_WRITE 0x00
#define NANDRW_JFFS2 0x02
extern struct nand_chip nand_dev_desc[];
int nand_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf);
int nand_erase(struct nand_chip* nand, size_t ofs,
size_t len, int clean);
/* references to names in env_common.c */
extern uchar default_environment[];
extern int default_environment_size;
char * env_name_spec = "NAND";
#ifdef ENV_IS_EMBEDDED
extern uchar environment[];
env_t *env_ptr = (env_t *)(&environment[0]);
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr = 0; //(env_t *)CFG_ENV_ADDR;
#endif /* ENV_IS_EMBEDDED */
/* local functions */
static void use_default(void);
uchar env_get_char_spec (int index)
{
DECLARE_GLOBAL_DATA_PTR;
return ( *((uchar *)(gd->env_addr + index)) );
}
/* this is called before nand_init()
* so we can't read Nand to validate env data.
* Mark it OK for now. env_relocate() in env_common.c
* will call our relocate function which will does
* the real validation.
*/
int env_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
return (0);
}
#ifdef CMD_SAVEENV
int saveenv(void)
{
int total, ret = 0;
puts ("Erasing Nand...");
if (nand_erase(nand_dev_desc + 0, CFG_ENV_OFFSET, CFG_ENV_SIZE, 0))
return 1;
puts ("Writing to Nand... ");
ret = nand_rw(nand_dev_desc + 0,
NANDRW_WRITE | NANDRW_JFFS2, CFG_ENV_OFFSET, CFG_ENV_SIZE,
&total, (u_char*)env_ptr);
if (ret || total != CFG_ENV_SIZE)
return 1;
puts ("done\n");
return ret;
}
#endif /* CMD_SAVEENV */
void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED)
int ret, total;
ret = nand_rw(nand_dev_desc + 0,
NANDRW_READ | NANDRW_JFFS2, CFG_ENV_OFFSET, CFG_ENV_SIZE,
&total, (u_char*)env_ptr);
if (ret || total != CFG_ENV_SIZE)
return use_default();
if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
return use_default();
#endif /* ! ENV_IS_EMBEDDED */
}
static void use_default()
{
DECLARE_GLOBAL_DATA_PTR;
puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
if (default_environment_size > CFG_ENV_SIZE){
puts ("*** Error - default environment is too large\n\n");
return;
}
memset (env_ptr, 0, sizeof(env_t));
memcpy (env_ptr->data,
default_environment,
default_environment_size);
env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
gd->env_valid = 1;
}
#endif /* CFG_ENV_IS_IN_NAND */