From 2b74433f365fa677a60431a80e524b5d8d04e995 Mon Sep 17 00:00:00 2001 From: Joe Hershberger Date: Mon, 8 Apr 2013 10:32:51 +0000 Subject: env: Add support for UBI environment UBI is a better place for the environment on NAND devices because it handles wear-leveling and bad blocks. Gluebi is needed in Linux to access the env as an MTD partition. Signed-off-by: Joe Hershberger --- common/env_ubi.c | 103 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 common/env_ubi.c (limited to 'common/env_ubi.c') diff --git a/common/env_ubi.c b/common/env_ubi.c new file mode 100644 index 00000000000..0c592a6f633 --- /dev/null +++ b/common/env_ubi.c @@ -0,0 +1,103 @@ +/* + * (c) Copyright 2012 by National Instruments, + * Joe Hershberger + * + * 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 + */ + +#include + +#include +#include +#include +#include +#include +#include +#undef crc32 + +char *env_name_spec = "UBI"; + +env_t *env_ptr; + +DECLARE_GLOBAL_DATA_PTR; + +int env_init(void) +{ + /* use default */ + gd->env_addr = (ulong)&default_environment[0]; + gd->env_valid = 1; + + return 0; +} + +#ifdef CONFIG_CMD_SAVEENV +int saveenv(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); + ssize_t len; + char *res; + + res = (char *)&env_new->data; + len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL); + if (len < 0) { + error("Cannot export environment: errno = %d\n", errno); + return 1; + } + + if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { + printf("\n** Cannot find mtd partition \"%s\"\n", + CONFIG_ENV_UBI_PART); + return 1; + } + + env_new->crc = crc32(0, env_new->data, ENV_SIZE); + + if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, (void *)env_new, + CONFIG_ENV_SIZE)) { + printf("\n** Unable to write env to %s:%s **\n", + CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME); + return 1; + } + + puts("done\n"); + return 0; +} +#endif /* CONFIG_CMD_SAVEENV */ + +void env_relocate_spec(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); + + if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { + printf("\n** Cannot find mtd partition \"%s\"\n", + CONFIG_ENV_UBI_PART); + set_default_env(NULL); + return; + } + + if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)&buf, + CONFIG_ENV_SIZE)) { + printf("\n** Unable to read env from %s:%s **\n", + CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME); + set_default_env(NULL); + return; + } + + env_import(buf, 1); +} -- cgit v1.2.3 From 785881f775252940185e10fbb2d5299c9ffa6bce Mon Sep 17 00:00:00 2001 From: Joe Hershberger Date: Mon, 8 Apr 2013 10:32:52 +0000 Subject: env: Add redundant env support to UBI env Allow the user to specify two UBI volumes to use for the environment Signed-off-by: Joe Hershberger --- common/env_ubi.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) (limited to 'common/env_ubi.c') diff --git a/common/env_ubi.c b/common/env_ubi.c index 0c592a6f633..1ed8b02e86e 100644 --- a/common/env_ubi.c +++ b/common/env_ubi.c @@ -47,6 +47,58 @@ int env_init(void) } #ifdef CONFIG_CMD_SAVEENV +#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT +static unsigned char env_flags; + +int saveenv(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); + ssize_t len; + char *res; + + res = (char *)&env_new->data; + len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL); + if (len < 0) { + error("Cannot export environment: errno = %d\n", errno); + return 1; + } + + if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { + printf("\n** Cannot find mtd partition \"%s\"\n", + CONFIG_ENV_UBI_PART); + return 1; + } + + env_new->crc = crc32(0, env_new->data, ENV_SIZE); + env_new->flags = ++env_flags; /* increase the serial */ + + if (gd->env_valid == 1) { + puts("Writing to redundant UBI... "); + if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND, + (void *)env_new, CONFIG_ENV_SIZE)) { + printf("\n** Unable to write env to %s:%s **\n", + CONFIG_ENV_UBI_PART, + CONFIG_ENV_UBI_VOLUME_REDUND); + return 1; + } + } else { + puts("Writing to UBI... "); + if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, + (void *)env_new, CONFIG_ENV_SIZE)) { + printf("\n** Unable to write env to %s:%s **\n", + CONFIG_ENV_UBI_PART, + CONFIG_ENV_UBI_VOLUME); + return 1; + } + } + + puts("done\n"); + + gd->env_valid = gd->env_valid == 2 ? 1 : 2; + + return 0; +} +#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */ int saveenv(void) { ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); @@ -78,8 +130,72 @@ int saveenv(void) puts("done\n"); return 0; } +#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */ #endif /* CONFIG_CMD_SAVEENV */ +#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT +void env_relocate_spec(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE); + ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE); + int crc1_ok = 0, crc2_ok = 0; + env_t *ep, *tmp_env1, *tmp_env2; + + tmp_env1 = (env_t *)env1_buf; + tmp_env2 = (env_t *)env2_buf; + + if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { + printf("\n** Cannot find mtd partition \"%s\"\n", + CONFIG_ENV_UBI_PART); + set_default_env(NULL); + return; + } + + if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1, + CONFIG_ENV_SIZE)) { + printf("\n** Unable to read env from %s:%s **\n", + CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME); + } + + if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND, (void *)tmp_env2, + CONFIG_ENV_SIZE)) { + printf("\n** Unable to read redundant env from %s:%s **\n", + CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND); + } + + crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc; + crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc; + + if (!crc1_ok && !crc2_ok) { + set_default_env("!bad CRC"); + return; + } else if (crc1_ok && !crc2_ok) { + gd->env_valid = 1; + } else if (!crc1_ok && crc2_ok) { + gd->env_valid = 2; + } else { + /* both ok - check serial */ + if (tmp_env1->flags == 255 && tmp_env2->flags == 0) + gd->env_valid = 2; + else if (tmp_env2->flags == 255 && tmp_env1->flags == 0) + gd->env_valid = 1; + else if (tmp_env1->flags > tmp_env2->flags) + gd->env_valid = 1; + else if (tmp_env2->flags > tmp_env1->flags) + gd->env_valid = 2; + else /* flags are equal - almost impossible */ + gd->env_valid = 1; + } + + if (gd->env_valid == 1) + ep = tmp_env1; + else + ep = tmp_env2; + + env_flags = ep->flags; + env_import((char *)ep, 0); +} +#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */ void env_relocate_spec(void) { ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); @@ -101,3 +217,4 @@ void env_relocate_spec(void) env_import(buf, 1); } +#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */ -- cgit v1.2.3