Initial revision

1 files changed, 377 insertions, 0 deletions

diff --git a/common/env_flash.c b/common/env_flash.c
new file mode 100644
index 00000000000..1593d2caac1
--- /dev/null
+++ b/common/env_flash.c
@@ -0,0 +1,377 @@
+/*
+ * (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>
+
+ * 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>
+
+#if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */
+
+#include <command.h>
+#include <environment.h>
+#include <cmd_nvedit.h>
+#include <linux/stddef.h>
+
+#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH))
+#define CMD_SAVEENV
+#elif defined(CFG_ENV_ADDR_REDUND)
+#error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
+#endif
+
+#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) && \
+    defined(CFG_ENV_ADDR_REDUND)
+#error CFG_ENV_ADDR_REDUND should not be used when CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
+#endif
+
+#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
+#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
+#endif
+
+#ifdef CONFIG_INFERNO
+# ifdef CFG_ENV_ADDR_REDUND
+#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
+# endif
+#endif
+
+char * env_name_spec = "Flash";
+
+#ifdef ENV_IS_EMBEDDED
+
+extern uchar environment[];
+env_t *env_ptr = (env_t *)(&environment[0]);
+
+#ifdef CMD_SAVEENV
+/* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
+static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
+#endif
+
+#else /* ! ENV_IS_EMBEDDED */
+
+env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
+#ifdef CMD_SAVEENV
+static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
+#endif
+
+#endif /* ENV_IS_EMBEDDED */
+
+#ifdef CFG_ENV_ADDR_REDUND
+static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND;
+
+static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SIZE - 1;
+static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1;
+
+static uchar active_flag = 1;
+static uchar obsolete_flag = 0;
+#endif
+
+extern uchar default_environment[];
+extern int default_environment_size;
+
+
+uchar env_get_char_spec (int index)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	return ( *((uchar *)(gd->env_addr + index)) );
+}
+
+#ifdef CFG_ENV_ADDR_REDUND
+
+int  env_init(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	int crc1_ok =
+		(crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
+	int crc2_ok =
+		(crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
+
+	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);
+
+	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)
+{
+	int rc = 1;
+
+	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;
+	}
+
+	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 (flash_write(env_ptr->data,
+	                (ulong)&(flash_addr_new->data),
+			sizeof(env_ptr->data)) ||
+
+	    flash_write((char *)&(env_ptr->crc),
+	                (ulong)&(flash_addr_new->crc),
+			sizeof(env_ptr->crc)) ||
+
+	    flash_write((char *)&obsolete_flag,
+	                (ulong)&(flash_addr->flags),
+			sizeof(flash_addr->flags)) ||
+
+	    flash_write((char *)&active_flag,
+	                (ulong)&(flash_addr_new->flags),
+			sizeof(flash_addr_new->flags)))
+	{
+		flash_perror (rc);
+		goto Done;
+	}
+	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:
+
+	/* 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 /* ! CFG_ENV_ADDR_REDUND */
+
+int  env_init(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
+		gd->env_addr  = (ulong)&(env_ptr->data);
+		gd->env_valid = 1;
+	} else {
+		gd->env_addr  = (ulong)&default_environment[0];
+		gd->env_valid = 0;
+	}
+
+	return (0);
+}
+
+#ifdef CMD_SAVEENV
+
+int saveenv(void)
+{
+	int	len, rc;
+	ulong	end_addr;
+	ulong	flash_sect_addr;
+#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
+	ulong	flash_offset;
+	uchar	env_buffer[CFG_ENV_SECT_SIZE];
+#else
+	uchar *env_buffer = (char *)env_ptr;
+#endif	/* CFG_ENV_SECT_SIZE */
+	int rcode = 0;
+
+#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
+
+	flash_offset    = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
+	flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
+
+	debug ( "copy old content: "
+		"sect_addr: %08lX  env_addr: %08lX  offset: %08lX\n",
+		flash_sect_addr, (ulong)flash_addr, flash_offset);
+
+	/* copy old contents to temporary buffer */
+	memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
+
+	/* copy current environment to temporary buffer */
+	memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
+		env_ptr,
+		CFG_ENV_SIZE);
+
+	len	 = CFG_ENV_SECT_SIZE;
+#else
+	flash_sect_addr = (ulong)flash_addr;
+	len	 = CFG_ENV_SIZE;
+#endif	/* CFG_ENV_SECT_SIZE */
+
+#ifndef CONFIG_INFERNO
+	end_addr = flash_sect_addr + len - 1;
+#else
+	/* this is the last sector, and the size is hardcoded here */
+	/* otherwise we will get stack problems on loading 128 KB environment */
+	end_addr = flash_sect_addr + 0x20000 - 1;
+#endif
+
+	debug ("Protect off %08lX ... %08lX\n",
+		(ulong)flash_sect_addr, end_addr);
+
+	if (flash_sect_protect (0, flash_sect_addr, end_addr))
+		return 1;
+
+	puts ("Erasing Flash...");
+	if (flash_sect_erase (flash_sect_addr, end_addr))
+		return 1;
+
+	puts ("Writing to Flash... ");
+	rc = flash_write(env_buffer, flash_sect_addr, len);
+	if (rc != 0) {
+		flash_perror (rc);
+		rcode = 1;
+	} else {
+		puts ("done\n");
+	}
+
+	/* try to re-protect */
+	(void) flash_sect_protect (1, flash_sect_addr, end_addr);
+	return rcode;
+}
+
+#endif /* CMD_SAVEENV */
+
+#endif /* CFG_ENV_ADDR_REDUND */
+
+void env_relocate_spec (void)
+{
+#if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
+#ifdef CFG_ENV_ADDR_REDUND
+	DECLARE_GLOBAL_DATA_PTR;
+
+	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)
+	{
+		gd->env_valid = 2;
+		flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
+		flash_write((char *)&obsolete_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)
+	{
+		gd->env_valid = 2;
+		flash_sect_protect (0, (ulong)flash_addr, end_addr);
+		flash_write((char *)&active_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 /* CFG_ENV_ADDR_REDUND */
+	memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
+#endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
+}
+
+#endif /* CFG_ENV_IS_IN_FLASH) */