/* * (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> * * (C) Copyright 2008 Atmel Corporation * * 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 <common.h> #include <environment.h> #include <malloc.h> #include <spi_flash.h> #ifndef CONFIG_ENV_SPI_BUS # define CONFIG_ENV_SPI_BUS 0 #endif #ifndef CONFIG_ENV_SPI_CS # define CONFIG_ENV_SPI_CS 0 #endif #ifndef CONFIG_ENV_SPI_MAX_HZ # define CONFIG_ENV_SPI_MAX_HZ 1000000 #endif #ifndef CONFIG_ENV_SPI_MODE # define CONFIG_ENV_SPI_MODE SPI_MODE_3 #endif DECLARE_GLOBAL_DATA_PTR; /* references to names in env_common.c */ extern uchar default_environment[]; char * env_name_spec = "SPI Flash"; env_t *env_ptr; static struct spi_flash *env_flash; uchar env_get_char_spec(int index) { return *((uchar *)(gd->env_addr + index)); } int saveenv(void) { u32 saved_size, saved_offset; char *saved_buffer = NULL; u32 sector = 1; int ret; if (!env_flash) { puts("Environment SPI flash not initialized\n"); return 1; } /* Is the sector larger than the env (i.e. embedded) */ if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) { saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE; saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE; saved_buffer = malloc(saved_size); if (!saved_buffer) { ret = 1; goto done; } ret = spi_flash_read(env_flash, saved_offset, saved_size, saved_buffer); if (ret) goto done; } if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) { sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE; if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE) sector++; } puts("Erasing SPI flash..."); ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET, sector * CONFIG_ENV_SECT_SIZE); if (ret) goto done; puts("Writing to SPI flash..."); ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr); if (ret) goto done; if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) { ret = spi_flash_write(env_flash, saved_offset, saved_size, saved_buffer); if (ret) goto done; } ret = 0; puts("done\n"); done: if (saved_buffer) free(saved_buffer); return ret; } void env_relocate_spec(void) { int ret; env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS, CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE); if (!env_flash) goto err_probe; ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr); if (ret) goto err_read; if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) goto err_crc; gd->env_valid = 1; return; err_read: spi_flash_free(env_flash); env_flash = NULL; err_probe: err_crc: puts("*** Warning - bad CRC, using default environment\n\n"); set_default_env(); } int env_init(void) { /* SPI flash isn't usable before relocation */ gd->env_addr = (ulong)&default_environment[0]; gd->env_valid = 1; return 0; }