X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=common%2Fenv_sf.c;h=d9e9085461bb6759b0b0ee0cc2f717d6653ede99;hb=bf3b98a1886ef18d7e2e4f83fec17f6c8cc51eaf;hp=2f52e2561b4f7967155736e3ab534242945cd4e5;hpb=156feb90d200f186cdfd856d7f6f1878bb1bec1e;p=oweals%2Fu-boot.git

diff --git a/common/env_sf.c b/common/env_sf.c
index 2f52e2561b..d9e9085461 100644
--- a/common/env_sf.c
+++ b/common/env_sf.c
@@ -1,5 +1,5 @@
 /*
- * (C) Copyright 2000-2002
+ * (C) Copyright 2000-2010
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
@@ -29,12 +29,14 @@
 #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
+# define CONFIG_ENV_SPI_CS	0
 #endif
 #ifndef CONFIG_ENV_SPI_MAX_HZ
 # define CONFIG_ENV_SPI_MAX_HZ	1000000
@@ -43,44 +45,67 @@
 # define CONFIG_ENV_SPI_MODE	SPI_MODE_3
 #endif
 
-DECLARE_GLOBAL_DATA_PTR;
+#ifdef CONFIG_ENV_OFFSET_REDUND
+static ulong env_offset		= CONFIG_ENV_OFFSET;
+static ulong env_new_offset	= CONFIG_ENV_OFFSET_REDUND;
 
-/* references to names in env_common.c */
-extern uchar default_environment[];
-extern int default_environment_size;
+#define ACTIVE_FLAG	1
+#define OBSOLETE_FLAG	0
+#endif /* CONFIG_ENV_OFFSET_REDUND */
 
-char * env_name_spec = "SPI Flash";
-env_t *env_ptr;
+DECLARE_GLOBAL_DATA_PTR;
 
-static struct spi_flash *env_flash;
+char *env_name_spec = "SPI Flash";
 
-uchar env_get_char_spec(int index)
-{
-	return *((uchar *)(gd->env_addr + index));
-}
+static struct spi_flash *env_flash;
 
+#if defined(CONFIG_ENV_OFFSET_REDUND)
 int saveenv(void)
 {
-	u32 saved_size, saved_offset;
-	char *saved_buffer = NULL;
-	u32 sector = 1;
-	int ret;
+	env_t	env_new;
+	ssize_t	len;
+	char	*res, *saved_buffer = NULL, flag = OBSOLETE_FLAG;
+	u32	saved_size, saved_offset, sector = 1;
+	int	ret;
 
 	if (!env_flash) {
-		puts("Environment SPI flash not initialized\n");
+		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', 0, &res, ENV_SIZE, 0, NULL);
+	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 = CONFIG_ENV_OFFSET + 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);
+		ret = spi_flash_read(env_flash, saved_offset,
+					saved_size, saved_buffer);
 		if (ret)
 			goto done;
 	}
@@ -92,68 +117,229 @@ int saveenv(void)
 	}
 
 	puts("Erasing SPI flash...");
-	ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET, sector * CONFIG_ENV_SECT_SIZE);
+	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, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr);
+
+	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);
+		ret = spi_flash_write(env_flash, saved_offset,
+					saved_size, saved_buffer);
 		if (ret)
 			goto done;
 	}
 
-	ret = 0;
+	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)
-		goto err_probe;
+	if (!env_flash) {
+		set_default_env("!spi_flash_probe() failed");
+		goto out;
+	}
 
-	ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr);
-	if (ret)
+	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, env_ptr->data, ENV_SIZE) != env_ptr->crc)
-		goto err_crc;
+	if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
+		crc1_ok = 1;
 
-	gd->env_valid = 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;
+	}
 
-	return;
+	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;
-err_probe:
-err_crc:
-	puts("*** Warning - bad CRC, using default environment\n\n");
+out:
+	free(tmp_env1);
+	free(tmp_env2);
+}
+#else
+int saveenv(void)
+{
+	u32	saved_size, saved_offset, sector = 1;
+	char	*res, *saved_buffer = NULL;
+	int	ret = 1;
+	env_t	env_new;
+	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;
 
-	if (default_environment_size > CONFIG_ENV_SIZE) {
-		gd->env_valid = 0;
-		puts("*** Error - default environment is too large\n\n");
+		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', 0, &res, ENV_SIZE, 0, NULL);
+	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;
 	}
 
-	memset(env_ptr, 0, sizeof(env_t));
-	memcpy(env_ptr->data, default_environment, default_environment_size);
-	env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
-	gd->env_valid = 1;
+	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)
 {