diff options
Diffstat (limited to 'u-boot/common/env_sf.c')
| -rw-r--r-- | u-boot/common/env_sf.c | 382 |
1 files changed, 382 insertions, 0 deletions
diff --git a/u-boot/common/env_sf.c b/u-boot/common/env_sf.c new file mode 100644 index 0000000..41cc00a --- /dev/null +++ b/u-boot/common/env_sf.c @@ -0,0 +1,382 @@ +/* + * (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> + * + * (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> +#include <search.h> +#include <errno.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 + +#ifdef CONFIG_ENV_OFFSET_REDUND +static ulong env_offset = CONFIG_ENV_OFFSET; +static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND; + +#define ACTIVE_FLAG 1 +#define OBSOLETE_FLAG 0 +#endif /* CONFIG_ENV_OFFSET_REDUND */ + +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)); +} + +#if defined(CONFIG_ENV_OFFSET_REDUND) + +int saveenv(void) +{ + env_t env_new; + ssize_t len; + char *res; + u32 saved_size, saved_offset; + char *saved_buffer = NULL; + u32 sector = 1; + int ret; + char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG; + + if (!env_flash) { + 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) { + set_default_env("!spi_flash_probe() failed"); + return 1; + } + } + + 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); + return 1; + } + env_new.crc = crc32(0, env_new.data, ENV_SIZE); + env_new.flags = ACTIVE_FLAG; + + if (gd->env_valid == 1) { + env_new_offset = CONFIG_ENV_OFFSET_REDUND; + env_offset = CONFIG_ENV_OFFSET; + } else { + env_new_offset = CONFIG_ENV_OFFSET; + env_offset = CONFIG_ENV_OFFSET_REDUND; + } + + /* 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 = env_new_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, env_new_offset, + sector * CONFIG_ENV_SECT_SIZE); + if (ret) + goto done; + + puts("Writing to SPI flash..."); + + ret = spi_flash_write(env_flash, env_new_offset, + CONFIG_ENV_SIZE, &env_new); + 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 = spi_flash_write(env_flash, + env_offset + offsetof(env_t, flags), + sizeof(env_new.flags), &flag); + if (ret) + goto done; + + puts("done\n"); + + gd->env_valid = (gd->env_valid == 2 ? 1 : 2); + + printf("Valid environment: %d\n", gd->env_valid); + + done: + if (saved_buffer) + free(saved_buffer); + return ret; +} + +void env_relocate_spec(void) +{ + int ret; + int crc1_ok = 0, crc2_ok = 0; + env_t *tmp_env1 = NULL; + env_t *tmp_env2 = NULL; + env_t *ep = NULL; + uchar flag1, flag2; + /* current_env is set only in case both areas are valid! */ + int current_env = 0; + + tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE); + tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE); + + if (!tmp_env1 || !tmp_env2) { + free(tmp_env1); + free(tmp_env2); + set_default_env("!malloc() failed"); + return; + } + + 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) { + set_default_env("!spi_flash_probe() failed"); + return; + } + + ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, + CONFIG_ENV_SIZE, tmp_env1); + if (ret) { + set_default_env("!spi_flash_read() failed"); + goto err_read; + } + + if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc) + crc1_ok = 1; + flag1 = tmp_env1->flags; + + ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND, + CONFIG_ENV_SIZE, tmp_env2); + if (!ret) { + if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc) + crc2_ok = 1; + flag2 = tmp_env2->flags; + } + + if (!crc1_ok && !crc2_ok) { + free(tmp_env1); + free(tmp_env2); + set_default_env("!bad CRC"); + return; + } else if (crc1_ok && !crc2_ok) { + gd->env_valid = 1; + ep = tmp_env1; + } else if (!crc1_ok && crc2_ok) { + gd->env_valid = 1; + } else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) { + gd->env_valid = 1; + } else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) { + gd->env_valid = 2; + } else if (flag1 == flag2) { + gd->env_valid = 2; + } else if (flag1 == 0xFF) { + gd->env_valid = 2; + } else { + /* + * this differs from code in env_flash.c, but I think a sane + * default path is desirable. + */ + gd->env_valid = 2; + } + + free(env_ptr); + + if (gd->env_valid == 1) + ep = tmp_env1; + else + ep = tmp_env2; + + ret = env_import((char *)ep, 0); + if (!ret) { + error("Cannot import environment: errno = %d\n", errno); + set_default_env("env_import failed"); + } + +err_read: + spi_flash_free(env_flash); + env_flash = NULL; +out: + if (tmp_env1) + free(tmp_env1); + if (tmp_env2) + free(tmp_env2); + free(tmp_env1); + free(tmp_env2); + + return; +} +#else +int saveenv(void) +{ + u32 saved_size, saved_offset; + char *saved_buffer = NULL; + u32 sector = 1; + int ret = 1; + env_t env_new; + char *res; + ssize_t len; + + if (!env_flash) { + 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) { + set_default_env("!spi_flash_probe() failed"); + 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) { + 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++; + } + + 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 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_new); + 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) +{ + char buf[CONFIG_ENV_SIZE]; + 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) { + set_default_env("!spi_flash_probe() failed"); + return; + } + + ret = spi_flash_read(env_flash, + CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf); + if (ret) { + set_default_env("!spi_flash_read() failed"); + goto out; + } + + ret = env_import(buf, 1); + + if (ret) + gd->env_valid = 1; +out: + spi_flash_free(env_flash); + env_flash = NULL; +} +#endif + +int env_init(void) +{ + /* SPI flash isn't usable before relocation */ + gd->env_addr = (ulong)&default_environment[0]; + gd->env_valid = 1; + + return 0; +} |