diff options
Diffstat (limited to 'common/env_eeprom.c')
| -rw-r--r-- | common/env_eeprom.c | 85 |
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; } |
