Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 283 insertions, 0 deletions

diff --git a/roms/u-boot-sam460ex/common/env_eeprom.c b/roms/u-boot-sam460ex/common/env_eeprom.c
new file mode 100644
index 000000000..4f7f0dbde
--- /dev/null
+++ b/roms/u-boot-sam460ex/common/env_eeprom.c
@@ -0,0 +1,283 @@
+/*
+ * (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
+ */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+#include <i2c.h>
+#endif
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+#define ACTIVE_FLAG   1
+#define OBSOLETE_FLAG 0
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+env_t *env_ptr = NULL;
+
+char * env_name_spec = "EEPROM";
+int env_eeprom_bus = -1;
+
+static int eeprom_bus_read (unsigned dev_addr, unsigned offset, uchar *buffer,
+				unsigned cnt)
+{
+	int rcode;
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+	int old_bus = i2c_get_bus_num();
+
+	if (gd->flags & GD_FLG_RELOC) {
+		if (env_eeprom_bus == -1) {
+			I2C_MUX_DEVICE *dev = NULL;
+			dev = i2c_mux_ident_muxstring(
+				(uchar *)CONFIG_I2C_ENV_EEPROM_BUS);
+			if (dev != NULL) {
+				env_eeprom_bus = dev->busid;
+			} else
+				printf ("error adding env eeprom bus.\n");
+		}
+		if (old_bus != env_eeprom_bus) {
+			i2c_set_bus_num(env_eeprom_bus);
+			old_bus = env_eeprom_bus;
+		}
+	} else {
+		rcode = i2c_mux_ident_muxstring_f(
+				(uchar *)CONFIG_I2C_ENV_EEPROM_BUS);
+	}
+#endif
+
+	rcode = eeprom_read (dev_addr, offset, buffer, cnt);
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+	if (old_bus != env_eeprom_bus)
+		i2c_set_bus_num(old_bus);
+#endif
+	return rcode;
+}
+
+static int eeprom_bus_write (unsigned dev_addr, unsigned offset, uchar *buffer,
+				unsigned cnt)
+{
+	int rcode;
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+	int old_bus = i2c_get_bus_num();
+
+	rcode = i2c_mux_ident_muxstring_f((uchar *)CONFIG_I2C_ENV_EEPROM_BUS);
+#endif
+	rcode = eeprom_write (dev_addr, offset, buffer, cnt);
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+	i2c_set_bus_num(old_bus);
+#endif
+	return rcode;
+}
+
+uchar env_get_char_spec (int index)
+{
+	uchar c;
+	unsigned int off;
+	off = CONFIG_ENV_OFFSET;
+#ifdef CONFIG_ENV_OFFSET_REDUND
+	if (gd->env_valid == 2)
+		off = CONFIG_ENV_OFFSET_REDUND;
+#endif
+
+	eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR,
+		     off + index + offsetof(env_t,data),
+		     &c, 1);
+
+	return (c);
+}
+
+void env_relocate_spec (void)
+{
+	unsigned int off = CONFIG_ENV_OFFSET;
+#ifdef CONFIG_ENV_OFFSET_REDUND
+	if (gd->env_valid == 2)
+		off = CONFIG_ENV_OFFSET_REDUND;
+#endif
+	eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR,
+		     off,
+		     (uchar*)env_ptr,
+		     CONFIG_ENV_SIZE);
+}
+
+int saveenv(void)
+{
+	int rc;
+	unsigned int off = CONFIG_ENV_OFFSET;
+#ifdef CONFIG_ENV_OFFSET_REDUND
+	unsigned int off_red = CONFIG_ENV_OFFSET_REDUND;
+	char flag_obsolete = OBSOLETE_FLAG;
+	if (gd->env_valid == 1) {
+		off = CONFIG_ENV_OFFSET_REDUND;
+		off_red = CONFIG_ENV_OFFSET;
+	}
+
+	env_ptr->flags = ACTIVE_FLAG;
+#endif
+
+	rc = eeprom_bus_write (CONFIG_SYS_DEF_EEPROM_ADDR,
+			     off,
+			     (uchar *)env_ptr,
+			     CONFIG_ENV_SIZE);
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+	if (rc == 0) {
+		eeprom_bus_write (CONFIG_SYS_DEF_EEPROM_ADDR,
+				  off_red + offsetof(env_t,flags),
+				  (uchar *)&flag_obsolete,
+				  1);
+		if (gd->env_valid == 1)
+			gd->env_valid = 2;
+		else
+			gd->env_valid = 1;
+
+	}
+#endif
+
+	return rc;
+}
+
+/************************************************************************
+ * Initialize Environment use
+ *
+ * We are still running from ROM, so data use is limited
+ * Use a (moderately small) buffer on the stack
+ */
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+int env_init(void)
+{
+	ulong len;
+	ulong crc[2], crc_tmp;
+	unsigned int off, off_env[2];
+	uchar buf[64];
+	int crc_ok[2] = {0,0};
+	unsigned char flags[2];
+	int i;
+
+	eeprom_init ();	/* prepare for EEPROM read/write */
+
+	off_env[0] = CONFIG_ENV_OFFSET;
+	off_env[1] = CONFIG_ENV_OFFSET_REDUND;
+
+	for (i = 0; i < 2; i++) {
+		/* read CRC */
+		eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR,
+			off_env[i] + offsetof(env_t,crc),
+			(uchar *)&crc[i], sizeof(ulong));
+		/* read FLAGS */
+		eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR,
+			off_env[i] + offsetof(env_t,flags),
+			(uchar *)&flags[i], sizeof(uchar));
+
+		crc_tmp= 0;
+		len = ENV_SIZE;
+		off = off_env[i] + offsetof(env_t,data);
+		while (len > 0) {
+			int n = (len > sizeof(buf)) ? sizeof(buf) : len;
+
+			eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR, off,
+				buf, n);
+
+			crc_tmp = crc32 (crc_tmp, buf, n);
+			len -= n;
+			off += n;
+		}
+		if (crc_tmp == crc[i])
+			crc_ok[i] = 1;
+	}
+
+	if (!crc_ok[0] && !crc_ok[1]) {
+		gd->env_addr  = 0;
+		gd->env_valid = 0;
+
+		return 0;
+	} else if (crc_ok[0] && !crc_ok[1]) {
+		gd->env_valid = 1;
+	}
+	else if (!crc_ok[0] && crc_ok[1]) {
+		gd->env_valid = 2;
+	} else {
+		/* both ok - check serial */
+		if (flags[0] == ACTIVE_FLAG && flags[1] == OBSOLETE_FLAG)
+			gd->env_valid = 1;
+		else if (flags[0] == OBSOLETE_FLAG && flags[1] == ACTIVE_FLAG)
+			gd->env_valid = 2;
+		else if (flags[0] == 0xFF && flags[1] == 0)
+			gd->env_valid = 2;
+		else if(flags[1] == 0xFF && flags[0] == 0)
+			gd->env_valid = 1;
+		else /* flags are equal - almost impossible */
+			gd->env_valid = 1;
+	}
+
+	if (gd->env_valid == 2)
+		gd->env_addr = off_env[1] + offsetof(env_t,data);
+	else if (gd->env_valid == 1)
+		gd->env_addr = off_env[0] + offsetof(env_t,data);
+
+	return (0);
+}
+#else
+int env_init(void)
+{
+	ulong crc, len, new;
+	unsigned off;
+	uchar buf[64];
+
+	eeprom_init ();	/* prepare for EEPROM read/write */
+
+	/* read old CRC */
+	eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR,
+		     CONFIG_ENV_OFFSET+offsetof(env_t,crc),
+		     (uchar *)&crc, sizeof(ulong));
+
+	new = 0;
+	len = ENV_SIZE;
+	off = offsetof(env_t,data);
+	while (len > 0) {
+		int n = (len > sizeof(buf)) ? sizeof(buf) : len;
+
+		eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR,
+				CONFIG_ENV_OFFSET + off, buf, n);
+		new = crc32 (new, buf, n);
+		len -= n;
+		off += n;
+	}
+
+	if (crc == new) {
+		gd->env_addr  = offsetof(env_t,data);
+		gd->env_valid = 1;
+	} else {
+		gd->env_addr  = 0;
+		gd->env_valid = 0;
+	}
+
+	return (0);
+}
+#endif