X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=common%2Fenv_nand.c;h=ce0a2514db458f8bd7cac293ccd7ecdf21ea7d42;hb=22ed2285743359fd1fe73e411dff914b2256e68f;hp=516aed7326dc47da821deff310a8c54807b46bca;hpb=49822e23a09e2f529e6774ad61f23e43ab208cbc;p=u-boot diff --git a/common/env_nand.c b/common/env_nand.c index 516aed7326..ce0a2514db 100644 --- a/common/env_nand.c +++ b/common/env_nand.c @@ -2,7 +2,7 @@ * (C) Copyright 2004 * Jian Zhang, Texas Instruments, jzhang@ti.com. - * (C) Copyright 2000-2004 + * (C) Copyright 2000-2006 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH @@ -37,35 +37,28 @@ #include #include #include -#include +#include -#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_NAND)) == (CFG_CMD_ENV|CFG_CMD_NAND)) +#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND) #define CMD_SAVEENV +#elif defined(CFG_ENV_OFFSET_REDUND) +#error Cannot use CFG_ENV_OFFSET_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_NAND #endif -#if defined(CFG_ENV_SIZE_REDUND) -#error CFG_ENV_SIZE_REDUND not supported yet +#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND != CFG_ENV_SIZE) +#error CFG_ENV_SIZE_REDUND should be the same as CFG_ENV_SIZE #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, +int nand_legacy_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); + +/* info for NAND chips, defined in drivers/mtd/nand/nand.c */ +extern nand_info_t nand_info[]; /* references to names in env_common.c */ extern uchar default_environment[]; @@ -83,13 +76,14 @@ env_t *env_ptr = 0; /* local functions */ +#if !defined(ENV_IS_EMBEDDED) static void use_default(void); +#endif +DECLARE_GLOBAL_DATA_PTR; uchar env_get_char_spec (int index) { - DECLARE_GLOBAL_DATA_PTR; - return ( *((uchar *)(gd->env_addr + index)) ); } @@ -99,62 +93,201 @@ uchar env_get_char_spec (int index) * Mark it OK for now. env_relocate() in env_common.c * will call our relocate function which will does * the real validation. + * + * When using a NAND boot image (like sequoia_nand), the environment + * can be embedded or attached to the U-Boot image in NAND flash. This way + * the SPL loads not only the U-Boot image from NAND but also the + * environment. */ int env_init(void) { - DECLARE_GLOBAL_DATA_PTR; +#if defined(ENV_IS_EMBEDDED) + ulong total; + int crc1_ok = 0, crc2_ok = 0; + env_t *tmp_env1, *tmp_env2; + + total = CFG_ENV_SIZE; + + tmp_env1 = env_ptr; + tmp_env2 = (env_t *)((ulong)env_ptr + CFG_ENV_SIZE); + + 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) + gd->env_valid = 0; + 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; + } - gd->env_addr = (ulong)&default_environment[0]; + if (gd->env_valid == 1) + env_ptr = tmp_env1; + else if (gd->env_valid == 2) + env_ptr = tmp_env2; +#else /* ENV_IS_EMBEDDED */ + gd->env_addr = (ulong)&default_environment[0]; gd->env_valid = 1; +#endif /* ENV_IS_EMBEDDED */ return (0); } #ifdef CMD_SAVEENV +/* + * The legacy NAND code saved the environment in the first NAND device i.e., + * nand_dev_desc + 0. This is also the behaviour using the new NAND code. + */ +#ifdef CFG_ENV_OFFSET_REDUND 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; + ulong total; + int ret = 0; + + env_ptr->flags++; + total = CFG_ENV_SIZE; + + if(gd->env_valid == 1) { + puts ("Erasing redundant Nand..."); + if (nand_erase(&nand_info[0], + CFG_ENV_OFFSET_REDUND, CFG_ENV_SIZE)) + return 1; + puts ("Writing to redundant Nand... "); + ret = nand_write(&nand_info[0], CFG_ENV_OFFSET_REDUND, &total, + (u_char*) env_ptr); + } else { + puts ("Erasing Nand..."); + if (nand_erase(&nand_info[0], + CFG_ENV_OFFSET, CFG_ENV_SIZE)) + return 1; + + puts ("Writing to Nand... "); + ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total, + (u_char*) env_ptr); + } + if (ret || total != CFG_ENV_SIZE) + return 1; + + puts ("done\n"); + gd->env_valid = (gd->env_valid == 2 ? 1 : 2); + return ret; +} +#else /* ! CFG_ENV_OFFSET_REDUND */ +int saveenv(void) +{ + ulong total; + int ret = 0; + + puts ("Erasing Nand..."); + if (nand_erase(&nand_info[0], CFG_ENV_OFFSET, CFG_ENV_SIZE)) + 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) + total = CFG_ENV_SIZE; + ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr); + if (ret || total != CFG_ENV_SIZE) return 1; - puts ("done\n"); - return ret; + puts ("done\n"); + return ret; } +#endif /* CFG_ENV_OFFSET_REDUND */ #endif /* CMD_SAVEENV */ +#ifdef CFG_ENV_OFFSET_REDUND +void env_relocate_spec (void) +{ +#if !defined(ENV_IS_EMBEDDED) + ulong total; + int crc1_ok = 0, crc2_ok = 0; + env_t *tmp_env1, *tmp_env2; + + total = CFG_ENV_SIZE; + + tmp_env1 = (env_t *) malloc(CFG_ENV_SIZE); + tmp_env2 = (env_t *) malloc(CFG_ENV_SIZE); + + nand_read(&nand_info[0], CFG_ENV_OFFSET, &total, + (u_char*) tmp_env1); + nand_read(&nand_info[0], CFG_ENV_OFFSET_REDUND, &total, + (u_char*) tmp_env2); + + 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) + return use_default(); + 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; + + } + + free(env_ptr); + if(gd->env_valid == 1) { + env_ptr = tmp_env1; + free(tmp_env2); + } else { + env_ptr = tmp_env2; + free(tmp_env1); + } + +#endif /* ! ENV_IS_EMBEDDED */ +} +#else /* ! CFG_ENV_OFFSET_REDUND */ +/* + * The legacy NAND code saved the environment in the first NAND device i.e., + * nand_dev_desc + 0. This is also the behaviour using the new NAND code. + */ void env_relocate_spec (void) { #if !defined(ENV_IS_EMBEDDED) - int ret, total; + ulong total; + int ret; - ret = nand_rw(nand_dev_desc + 0, - NANDRW_READ | NANDRW_JFFS2, CFG_ENV_OFFSET, CFG_ENV_SIZE, - &total, (u_char*)env_ptr); + total = CFG_ENV_SIZE; + ret = nand_read(&nand_info[0], CFG_ENV_OFFSET, &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 */ - } +#endif /* CFG_ENV_OFFSET_REDUND */ +#if !defined(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){ + if (default_environment_size > CFG_ENV_SIZE){ puts ("*** Error - default environment is too large\n\n"); return; } @@ -164,8 +297,9 @@ static void use_default() default_environment, default_environment_size); env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE); - gd->env_valid = 1; + gd->env_valid = 1; } +#endif #endif /* CFG_ENV_IS_IN_NAND */