/* * (C) Copyright 2000-2010 * 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> #include <command.h> #include <environment.h> #include <linux/stddef.h> #include <malloc.h> #include <search.h> #include <errno.h> DECLARE_GLOBAL_DATA_PTR; #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH) #define CMD_SAVEENV #elif defined(CONFIG_ENV_ADDR_REDUND) #error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH #endif #if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE) #error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE #endif char * env_name_spec = "Flash"; #ifdef ENV_IS_EMBEDDED extern uchar environment[]; env_t *env_ptr = (env_t *)(&environment[0]); static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR; #else /* ! ENV_IS_EMBEDDED */ env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR; static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR; #endif /* ENV_IS_EMBEDDED */ #if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND) /* CONFIG_ENV_ADDR is supposed to be on sector boundary */ static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1; #endif #ifdef CONFIG_ENV_ADDR_REDUND static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND; /* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */ static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1; #endif /* CONFIG_ENV_ADDR_REDUND */ extern uchar default_environment[]; uchar env_get_char_spec(int index) { return (*((uchar *)(gd->env_addr + index))); } #ifdef CONFIG_ENV_ADDR_REDUND int env_init(void) { int crc1_ok = 0, crc2_ok = 0; 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); crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc); crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc); 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) { env_t env_new; ssize_t len; char *saved_data = NULL; char *res; int rc = 1; char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG; #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE ulong up_data = 0; #endif 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; } res = (char *)&env_new.data; len = hexport_r(&env_htab, '\0', &res, ENV_SIZE); if (len < 0) { error("Cannot export environment: errno = %d\n", errno); goto done; } env_new.crc = crc32(0, env_new.data, ENV_SIZE); env_new.flags = new_flag; #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE up_data = (end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE)); debug("Data to save 0x%lX\n", up_data); if (up_data) { if ((saved_data = malloc(up_data)) == NULL) { printf("Unable to save the rest of sector (%ld)\n", up_data); goto done; } memcpy(saved_data, (void *)((long)flash_addr_new + CONFIG_ENV_SIZE), up_data); debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n", (long)flash_addr_new + CONFIG_ENV_SIZE, up_data, saved_data); } #endif 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 ((rc = flash_write((char *)&env_new, (ulong)flash_addr_new, sizeof(env_new))) || (rc = flash_write(&flag, (ulong)&(flash_addr->flags), sizeof(flash_addr->flags))) ) { flash_perror(rc); goto done; } #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE if (up_data) { /* restore the rest of sector */ debug("Restoring the rest of data to 0x%lX len 0x%lX\n", (long)flash_addr_new + CONFIG_ENV_SIZE, up_data); if (flash_write(saved_data, (long)flash_addr_new + CONFIG_ENV_SIZE, up_data)) { flash_perror(rc); goto done; } } #endif 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: if (saved_data) free(saved_data); /* 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 /* ! CONFIG_ENV_ADDR_REDUND */ int env_init(void) { if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) { gd->env_addr = (ulong)&(env_ptr->data); gd->env_valid = 1; return(0); } gd->env_addr = (ulong)&default_environment[0]; gd->env_valid = 0; return 0; } #ifdef CMD_SAVEENV int saveenv(void) { env_t env_new; ssize_t len; int rc = 1; char *res; char *saved_data = NULL; #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE ulong up_data = 0; up_data = (end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE)); debug("Data to save 0x%lx\n", up_data); if (up_data) { if ((saved_data = malloc(up_data)) == NULL) { printf("Unable to save the rest of sector (%ld)\n", up_data); goto done; } memcpy(saved_data, (void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data); debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n", (ulong)flash_addr + CONFIG_ENV_SIZE, up_data, (ulong)saved_data); } #endif /* CONFIG_ENV_SECT_SIZE */ debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr); if (flash_sect_protect(0, (long)flash_addr, end_addr)) goto done; res = (char *)&env_new.data; len = hexport_r(&env_htab, '\0', &res, ENV_SIZE); if (len < 0) { error("Cannot export environment: errno = %d\n", errno); goto done; } env_new.crc = crc32(0, env_new.data, ENV_SIZE); puts("Erasing Flash..."); if (flash_sect_erase((long)flash_addr, end_addr)) goto done; puts("Writing to Flash... "); rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE); if (rc != 0) { flash_perror(rc); goto done; } #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE if (up_data) { /* restore the rest of sector */ debug("Restoring the rest of data to 0x%lx len 0x%lx\n", (ulong)flash_addr + CONFIG_ENV_SIZE, up_data); if (flash_write(saved_data, (long)flash_addr + CONFIG_ENV_SIZE, up_data)) { flash_perror(rc); goto done; } } #endif puts("done\n"); rc = 0; done: if (saved_data) free(saved_data); /* try to re-protect */ (void) flash_sect_protect(1, (long)flash_addr, end_addr); return rc; } #endif /* CMD_SAVEENV */ #endif /* CONFIG_ENV_ADDR_REDUND */ void env_relocate_spec(void) { #ifdef CONFIG_ENV_ADDR_REDUND 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) { char flag = OBSOLETE_FLAG; gd->env_valid = 2; flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new); flash_write(&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) { char flag = ACTIVE_FLAG; gd->env_valid = 2; flash_sect_protect(0, (ulong)flash_addr, end_addr); flash_write(&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 /* CONFIG_ENV_ADDR_REDUND */ env_import((char *)flash_addr, 1); }