diff options
Diffstat (limited to 'common/env_flash.c')
| -rw-r--r-- | common/env_flash.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/common/env_flash.c b/common/env_flash.c new file mode 100644 index 00000000000..1593d2caac1 --- /dev/null +++ b/common/env_flash.c @@ -0,0 +1,377 @@ +/* + * (C) Copyright 2000-2002 + * 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_FLASH) /* Environment is in Flash */ + +#include <command.h> +#include <environment.h> +#include <cmd_nvedit.h> +#include <linux/stddef.h> + +#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH)) +#define CMD_SAVEENV +#elif defined(CFG_ENV_ADDR_REDUND) +#error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH +#endif + +#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) && \ + defined(CFG_ENV_ADDR_REDUND) +#error CFG_ENV_ADDR_REDUND should not be used when CFG_ENV_SECT_SIZE > CFG_ENV_SIZE +#endif + +#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE) +#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE +#endif + +#ifdef CONFIG_INFERNO +# ifdef CFG_ENV_ADDR_REDUND +#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO +# endif +#endif + +char * env_name_spec = "Flash"; + +#ifdef ENV_IS_EMBEDDED + +extern uchar environment[]; +env_t *env_ptr = (env_t *)(&environment[0]); + +#ifdef CMD_SAVEENV +/* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/ +static env_t *flash_addr = (env_t *)CFG_ENV_ADDR; +#endif + +#else /* ! ENV_IS_EMBEDDED */ + +env_t *env_ptr = (env_t *)CFG_ENV_ADDR; +#ifdef CMD_SAVEENV +static env_t *flash_addr = (env_t *)CFG_ENV_ADDR; +#endif + +#endif /* ENV_IS_EMBEDDED */ + +#ifdef CFG_ENV_ADDR_REDUND +static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND; + +static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SIZE - 1; +static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1; + +static uchar active_flag = 1; +static uchar obsolete_flag = 0; +#endif + +extern uchar default_environment[]; +extern int default_environment_size; + + +uchar env_get_char_spec (int index) +{ + DECLARE_GLOBAL_DATA_PTR; + + return ( *((uchar *)(gd->env_addr + index)) ); +} + +#ifdef CFG_ENV_ADDR_REDUND + +int env_init(void) +{ + DECLARE_GLOBAL_DATA_PTR; + + int crc1_ok = + (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc); + int crc2_ok = + (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc); + + uchar flag1 = flash_addr->flags; + uchar flag2 = flash_addr_new->flags; + + ulong addr_default = (ulong)&default_environment[0]; + ulong addr1 = (ulong)&(flash_addr->data); + ulong addr2 = (ulong)&(flash_addr_new->data); + + if (crc1_ok && ! crc2_ok) + { + gd->env_addr = addr1; + gd->env_valid = 1; + } + else if (! crc1_ok && crc2_ok) + { + gd->env_addr = addr2; + gd->env_valid = 1; + } + else if (! crc1_ok && ! crc2_ok) + { + gd->env_addr = addr_default; + gd->env_valid = 0; + } + else if (flag1 == active_flag && flag2 == obsolete_flag) + { + gd->env_addr = addr1; + gd->env_valid = 1; + } + else if (flag1 == obsolete_flag && flag2 == active_flag) + { + gd->env_addr = addr2; + gd->env_valid = 1; + } + else if (flag1 == flag2) + { + gd->env_addr = addr1; + gd->env_valid = 2; + } + else if (flag1 == 0xFF) + { + gd->env_addr = addr1; + gd->env_valid = 2; + } + else if (flag2 == 0xFF) + { + gd->env_addr = addr2; + gd->env_valid = 2; + } + + return (0); +} + +#ifdef CMD_SAVEENV +int saveenv(void) +{ + int rc = 1; + + debug ("Protect off %08lX ... %08lX\n", + (ulong)flash_addr, end_addr); + + if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) { + goto Done; + } + + debug ("Protect off %08lX ... %08lX\n", + (ulong)flash_addr_new, end_addr_new); + + if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) { + goto Done; + } + + puts ("Erasing Flash..."); + debug (" %08lX ... %08lX ...", + (ulong)flash_addr_new, end_addr_new); + + if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) { + goto Done; + } + + puts ("Writing to Flash... "); + debug (" %08lX ... %08lX ...", + (ulong)&(flash_addr_new->data), + sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data)); + if (flash_write(env_ptr->data, + (ulong)&(flash_addr_new->data), + sizeof(env_ptr->data)) || + + flash_write((char *)&(env_ptr->crc), + (ulong)&(flash_addr_new->crc), + sizeof(env_ptr->crc)) || + + flash_write((char *)&obsolete_flag, + (ulong)&(flash_addr->flags), + sizeof(flash_addr->flags)) || + + flash_write((char *)&active_flag, + (ulong)&(flash_addr_new->flags), + sizeof(flash_addr_new->flags))) + { + flash_perror (rc); + goto Done; + } + puts ("done\n"); + + { + env_t * etmp = flash_addr; + ulong ltmp = end_addr; + + flash_addr = flash_addr_new; + flash_addr_new = etmp; + + end_addr = end_addr_new; + end_addr_new = ltmp; + } + + rc = 0; +Done: + + /* try to re-protect */ + (void) flash_sect_protect (1, (ulong)flash_addr, end_addr); + (void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new); + + return rc; +} +#endif /* CMD_SAVEENV */ + +#else /* ! CFG_ENV_ADDR_REDUND */ + +int env_init(void) +{ + DECLARE_GLOBAL_DATA_PTR; + + if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) { + gd->env_addr = (ulong)&(env_ptr->data); + gd->env_valid = 1; + } else { + gd->env_addr = (ulong)&default_environment[0]; + gd->env_valid = 0; + } + + return (0); +} + +#ifdef CMD_SAVEENV + +int saveenv(void) +{ + int len, rc; + ulong end_addr; + ulong flash_sect_addr; +#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) + ulong flash_offset; + uchar env_buffer[CFG_ENV_SECT_SIZE]; +#else + uchar *env_buffer = (char *)env_ptr; +#endif /* CFG_ENV_SECT_SIZE */ + int rcode = 0; + +#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) + + flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1); + flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1); + + debug ( "copy old content: " + "sect_addr: %08lX env_addr: %08lX offset: %08lX\n", + flash_sect_addr, (ulong)flash_addr, flash_offset); + + /* copy old contents to temporary buffer */ + memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE); + + /* copy current environment to temporary buffer */ + memcpy ((uchar *)((unsigned long)env_buffer + flash_offset), + env_ptr, + CFG_ENV_SIZE); + + len = CFG_ENV_SECT_SIZE; +#else + flash_sect_addr = (ulong)flash_addr; + len = CFG_ENV_SIZE; +#endif /* CFG_ENV_SECT_SIZE */ + +#ifndef CONFIG_INFERNO + end_addr = flash_sect_addr + len - 1; +#else + /* this is the last sector, and the size is hardcoded here */ + /* otherwise we will get stack problems on loading 128 KB environment */ + end_addr = flash_sect_addr + 0x20000 - 1; +#endif + + debug ("Protect off %08lX ... %08lX\n", + (ulong)flash_sect_addr, end_addr); + + if (flash_sect_protect (0, flash_sect_addr, end_addr)) + return 1; + + puts ("Erasing Flash..."); + if (flash_sect_erase (flash_sect_addr, end_addr)) + return 1; + + puts ("Writing to Flash... "); + rc = flash_write(env_buffer, flash_sect_addr, len); + if (rc != 0) { + flash_perror (rc); + rcode = 1; + } else { + puts ("done\n"); + } + + /* try to re-protect */ + (void) flash_sect_protect (1, flash_sect_addr, end_addr); + return rcode; +} + +#endif /* CMD_SAVEENV */ + +#endif /* CFG_ENV_ADDR_REDUND */ + +void env_relocate_spec (void) +{ +#if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND) +#ifdef CFG_ENV_ADDR_REDUND + DECLARE_GLOBAL_DATA_PTR; + + if (gd->env_addr != (ulong)&(flash_addr->data)) + { + env_t * etmp = flash_addr; + ulong ltmp = end_addr; + + flash_addr = flash_addr_new; + flash_addr_new = etmp; + + end_addr = end_addr_new; + end_addr_new = ltmp; + } + + if (flash_addr_new->flags != obsolete_flag && + crc32(0, flash_addr_new->data, ENV_SIZE) == + flash_addr_new->crc) + { + gd->env_valid = 2; + flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new); + flash_write((char *)&obsolete_flag, + (ulong)&(flash_addr_new->flags), + sizeof(flash_addr_new->flags)); + flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new); + } + + if (flash_addr->flags != active_flag && + (flash_addr->flags & active_flag) == active_flag) + { + gd->env_valid = 2; + flash_sect_protect (0, (ulong)flash_addr, end_addr); + flash_write((char *)&active_flag, + (ulong)&(flash_addr->flags), + sizeof(flash_addr->flags)); + flash_sect_protect (1, (ulong)flash_addr, end_addr); + } + + if (gd->env_valid == 2) + puts ("*** Warning - some problems detected " + "reading environment; recovered successfully\n\n"); +#endif /* CFG_ENV_ADDR_REDUND */ + memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE); +#endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */ +} + +#endif /* CFG_ENV_IS_IN_FLASH) */ |