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Diffstat (limited to 'common/env_eeprom.c')
-rw-r--r--common/env_eeprom.c85
1 files changed, 55 insertions, 30 deletions
diff --git a/common/env_eeprom.c b/common/env_eeprom.c
index 8fe59f8224..792b44ffab 100644
--- a/common/env_eeprom.c
+++ b/common/env_eeprom.c
@@ -1,10 +1,10 @@
/*
- * (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>
* Andreas Heppel <aheppel@sysgo.de>
-
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
@@ -31,16 +31,19 @@
#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
#include <i2c.h>
#endif
+#include <search.h>
+#include <errno.h>
+#include <linux/compiler.h> /* for BUG_ON */
DECLARE_GLOBAL_DATA_PTR;
env_t *env_ptr = NULL;
-char * env_name_spec = "EEPROM";
+char *env_name_spec = "EEPROM";
int env_eeprom_bus = -1;
-static int eeprom_bus_read (unsigned dev_addr, unsigned offset, uchar *buffer,
- unsigned cnt)
+static int eeprom_bus_read(unsigned dev_addr, unsigned offset,
+ uchar *buffer, unsigned cnt)
{
int rcode;
#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
@@ -51,9 +54,9 @@ static int eeprom_bus_read (unsigned dev_addr, unsigned offset, uchar *buffer,
I2C_MUX_DEVICE *dev = NULL;
dev = i2c_mux_ident_muxstring(
(uchar *)CONFIG_I2C_ENV_EEPROM_BUS);
- if (dev != NULL) {
+ if (dev != NULL)
env_eeprom_bus = dev->busid;
- } else
+ else
printf ("error adding env eeprom bus.\n");
}
if (old_bus != env_eeprom_bus) {
@@ -67,6 +70,7 @@ static int eeprom_bus_read (unsigned dev_addr, unsigned offset, uchar *buffer,
#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);
@@ -74,8 +78,8 @@ static int eeprom_bus_read (unsigned dev_addr, unsigned offset, uchar *buffer,
return rcode;
}
-static int eeprom_bus_write (unsigned dev_addr, unsigned offset, uchar *buffer,
- unsigned cnt)
+static int eeprom_bus_write(unsigned dev_addr, unsigned offset,
+ uchar *buffer, unsigned cnt)
{
int rcode;
#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
@@ -83,7 +87,7 @@ static int eeprom_bus_write (unsigned dev_addr, unsigned offset, uchar *buffer,
rcode = i2c_mux_ident_muxstring_f((uchar *)CONFIG_I2C_ENV_EEPROM_BUS);
#endif
- rcode = eeprom_write (dev_addr, offset, buffer, cnt);
+ rcode = eeprom_write(dev_addr, offset, buffer, cnt);
#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
i2c_set_bus_num(old_bus);
#endif
@@ -95,12 +99,12 @@ 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,
+ eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR,
off + index + offsetof(env_t,data),
&c, 1);
@@ -109,40 +113,60 @@ uchar env_get_char_spec (int index)
void env_relocate_spec (void)
{
+ char buf[CONFIG_ENV_SIZE];
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,
+ eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR,
off,
- (uchar*)env_ptr,
+ (uchar *)buf,
CONFIG_ENV_SIZE);
+
+ env_import(buf, 1);
}
int saveenv(void)
{
+ env_t env_new;
+ ssize_t len;
+ char *res;
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;
+#endif
+
+ BUG_ON(env_ptr != NULL);
+
+ res = (char *)&env_new.data;
+ len = hexport('\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);
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
if (gd->env_valid == 1) {
off = CONFIG_ENV_OFFSET_REDUND;
off_red = CONFIG_ENV_OFFSET;
}
- env_ptr->flags = ACTIVE_FLAG;
+ env_new.flags = ACTIVE_FLAG;
#endif
- rc = eeprom_bus_write (CONFIG_SYS_DEF_EEPROM_ADDR,
+ rc = eeprom_bus_write(CONFIG_SYS_DEF_EEPROM_ADDR,
off,
- (uchar *)env_ptr,
+ (uchar *)&env_new,
CONFIG_ENV_SIZE);
#ifdef CONFIG_ENV_OFFSET_REDUND
if (rc == 0) {
- eeprom_bus_write (CONFIG_SYS_DEF_EEPROM_ADDR,
+ eeprom_bus_write(CONFIG_SYS_DEF_EEPROM_ADDR,
off_red + offsetof(env_t,flags),
(uchar *)&flag_obsolete,
1);
@@ -157,10 +181,10 @@ int saveenv(void)
return rc;
}
-/************************************************************************
+/*
* Initialize Environment use
*
- * We are still running from ROM, so data use is limited
+ * We are still running from ROM, so data use is limited.
* Use a (moderately small) buffer on the stack
*/
@@ -175,31 +199,31 @@ int env_init(void)
unsigned char flags[2];
int i;
- eeprom_init (); /* prepare for EEPROM read/write */
+ 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,
+ 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,
+ eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR,
off_env[i] + offsetof(env_t,flags),
(uchar *)&flags[i], sizeof(uchar));
- crc_tmp= 0;
+ 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,
+ eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR, off,
buf, n);
- crc_tmp = crc32 (crc_tmp, buf, n);
+ crc_tmp = crc32(crc_tmp, buf, n);
len -= n;
off += n;
}
@@ -245,22 +269,23 @@ int env_init(void)
unsigned off;
uchar buf[64];
- eeprom_init (); /* prepare for EEPROM read/write */
+ eeprom_init(); /* prepare for EEPROM read/write */
/* read old CRC */
- eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR,
+ 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,
+ eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR,
CONFIG_ENV_OFFSET + off, buf, n);
- new = crc32 (new, buf, n);
+ new = crc32(new, buf, n);
len -= n;
off += n;
}
generated by cgit (git 2.34.1) at 2024-12-23 09:54:32 +0000