common/env_sf.c - u-boot - Git at Google

 /*
  * (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";

 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;

 	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", (int)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;

 	tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
 	tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);

 	if (!tmp_env1 || !tmp_env2) {
 		set_default_env("!malloc() failed");
 		goto out;
 	}

 	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");
 		goto out;
 	}

 	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;

 	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;
 	}

 	if (!crc1_ok && !crc2_ok) {
 		set_default_env("!bad CRC");
 		goto err_read;
 	} else if (crc1_ok && !crc2_ok) {
 		gd->env_valid = 1;
 	} else if (!crc1_ok && crc2_ok) {
 		gd->env_valid = 2;
 	} else if (tmp_env1->flags == ACTIVE_FLAG &&
 		   tmp_env2->flags == OBSOLETE_FLAG) {
 		gd->env_valid = 1;
 	} else if (tmp_env1->flags == OBSOLETE_FLAG &&
 		   tmp_env2->flags == ACTIVE_FLAG) {
 		gd->env_valid = 2;
 	} else if (tmp_env1->flags == tmp_env2->flags) {
 		gd->env_valid = 2;
 	} else if (tmp_env1->flags == 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;
 	}

 	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:
 	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;
 }
	/*
	* (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";

	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;

	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", (int)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;

	tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
	tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);

	if (!tmp_env1 \|\| !tmp_env2) {
	set_default_env("!malloc() failed");
	goto out;
	}

	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");
	goto out;
	}

	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;

	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;
	}

	if (!crc1_ok && !crc2_ok) {
	set_default_env("!bad CRC");
	goto err_read;
	} else if (crc1_ok && !crc2_ok) {
	gd->env_valid = 1;
	} else if (!crc1_ok && crc2_ok) {
	gd->env_valid = 2;
	} else if (tmp_env1->flags == ACTIVE_FLAG &&
	tmp_env2->flags == OBSOLETE_FLAG) {
	gd->env_valid = 1;
	} else if (tmp_env1->flags == OBSOLETE_FLAG &&
	tmp_env2->flags == ACTIVE_FLAG) {
	gd->env_valid = 2;
	} else if (tmp_env1->flags == tmp_env2->flags) {
	gd->env_valid = 2;
	} else if (tmp_env1->flags == 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;
	}

	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:
	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;
	}