* (C) Copyright 2004
* Jian Zhang, Texas Instruments, jzhang@ti.com.
- * (C) Copyright 2000-2004
+ * (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
-#include <linux/mtd/nand.h>
+#include <malloc.h>
+#include <nand.h>
-#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_NAND)) == (CFG_CMD_ENV|CFG_CMD_NAND))
+#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)
#define CMD_SAVEENV
+#elif defined(CFG_ENV_OFFSET_REDUND)
+#error Cannot use CFG_ENV_OFFSET_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_NAND
#endif
-#if defined(CFG_ENV_SIZE_REDUND)
-#error CFG_ENV_SIZE_REDUND not supported yet
+#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND != CFG_ENV_SIZE)
+#error CFG_ENV_SIZE_REDUND should be the same as CFG_ENV_SIZE
#endif
-#if defined(CFG_ENV_ADDR_REDUND)
-#error CFG_ENV_ADDR_REDUND and CFG_ENV_IS_IN_NAND not supported yet
-#endif
-
-
#ifdef CONFIG_INFERNO
#error CONFIG_INFERNO not supported yet
#endif
-/* references to names in cmd_nand.c */
-#define NANDRW_READ 0x01
-#define NANDRW_WRITE 0x00
-#define NANDRW_JFFS2 0x02
-extern struct nand_chip nand_dev_desc[];
-int nand_rw (struct nand_chip* nand, int cmd,
+int nand_legacy_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf);
-int nand_erase(struct nand_chip* nand, size_t ofs,
- size_t len, int clean);
+
+/* info for NAND chips, defined in drivers/mtd/nand/nand.c */
+extern nand_info_t nand_info[];
/* references to names in env_common.c */
extern uchar default_environment[];
/* local functions */
+#if !defined(ENV_IS_EMBEDDED)
static void use_default(void);
+#endif
+DECLARE_GLOBAL_DATA_PTR;
uchar env_get_char_spec (int index)
{
- DECLARE_GLOBAL_DATA_PTR;
-
return ( *((uchar *)(gd->env_addr + index)) );
}
* Mark it OK for now. env_relocate() in env_common.c
* will call our relocate function which will does
* the real validation.
+ *
+ * When using a NAND boot image (like sequoia_nand), the environment
+ * can be embedded or attached to the U-Boot image in NAND flash. This way
+ * the SPL loads not only the U-Boot image from NAND but also the
+ * environment.
*/
int env_init(void)
{
- DECLARE_GLOBAL_DATA_PTR;
+#if defined(ENV_IS_EMBEDDED)
+ ulong total;
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *tmp_env1, *tmp_env2;
+
+ total = CFG_ENV_SIZE;
+
+ tmp_env1 = env_ptr;
+ tmp_env2 = (env_t *)((ulong)env_ptr + CFG_ENV_SIZE);
+
+ crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+ crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+
+ if (!crc1_ok && !crc2_ok)
+ gd->env_valid = 0;
+ else if(crc1_ok && !crc2_ok)
+ gd->env_valid = 1;
+ else if(!crc1_ok && crc2_ok)
+ gd->env_valid = 2;
+ else {
+ /* both ok - check serial */
+ if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if(tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if(tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
- gd->env_addr = (ulong)&default_environment[0];
+ if (gd->env_valid == 1)
+ env_ptr = tmp_env1;
+ else if (gd->env_valid == 2)
+ env_ptr = tmp_env2;
+#else /* ENV_IS_EMBEDDED */
+ gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
+#endif /* ENV_IS_EMBEDDED */
return (0);
}
#ifdef CMD_SAVEENV
+/*
+ * The legacy NAND code saved the environment in the first NAND device i.e.,
+ * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
+ */
+#ifdef CFG_ENV_OFFSET_REDUND
int saveenv(void)
{
- int total, ret = 0;
- puts ("Erasing Nand...");
- if (nand_erase(nand_dev_desc + 0, CFG_ENV_OFFSET, CFG_ENV_SIZE, 0))
- return 1;
+ size_t total;
+ int ret = 0;
+
+ env_ptr->flags++;
+ total = CFG_ENV_SIZE;
+
+ if(gd->env_valid == 1) {
+ puts ("Erasing redundant Nand...");
+ if (nand_erase(&nand_info[0],
+ CFG_ENV_OFFSET_REDUND, CFG_ENV_SIZE))
+ return 1;
+ puts ("Writing to redundant Nand... ");
+ ret = nand_write(&nand_info[0], CFG_ENV_OFFSET_REDUND, &total,
+ (u_char*) env_ptr);
+ } else {
+ puts ("Erasing Nand...");
+ if (nand_erase(&nand_info[0],
+ CFG_ENV_OFFSET, CFG_ENV_SIZE))
+ return 1;
+
+ puts ("Writing to Nand... ");
+ ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total,
+ (u_char*) env_ptr);
+ }
+ if (ret || total != CFG_ENV_SIZE)
+ return 1;
+
+ puts ("done\n");
+ gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
+ return ret;
+}
+#else /* ! CFG_ENV_OFFSET_REDUND */
+int saveenv(void)
+{
+ ulong total;
+ int ret = 0;
+
+ puts ("Erasing Nand...");
+ if (nand_erase(&nand_info[0], CFG_ENV_OFFSET, CFG_ENV_SIZE))
+ return 1;
puts ("Writing to Nand... ");
- ret = nand_rw(nand_dev_desc + 0,
- NANDRW_WRITE | NANDRW_JFFS2, CFG_ENV_OFFSET, CFG_ENV_SIZE,
- &total, (u_char*)env_ptr);
- if (ret || total != CFG_ENV_SIZE)
+ total = CFG_ENV_SIZE;
+ ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);
+ if (ret || total != CFG_ENV_SIZE)
return 1;
- puts ("done\n");
- return ret;
+ puts ("done\n");
+ return ret;
}
+#endif /* CFG_ENV_OFFSET_REDUND */
#endif /* CMD_SAVEENV */
+#ifdef CFG_ENV_OFFSET_REDUND
+void env_relocate_spec (void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ size_t total;
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *tmp_env1, *tmp_env2;
+
+ total = CFG_ENV_SIZE;
+
+ tmp_env1 = (env_t *) malloc(CFG_ENV_SIZE);
+ tmp_env2 = (env_t *) malloc(CFG_ENV_SIZE);
+
+ nand_read(&nand_info[0], CFG_ENV_OFFSET, &total,
+ (u_char*) tmp_env1);
+ nand_read(&nand_info[0], CFG_ENV_OFFSET_REDUND, &total,
+ (u_char*) tmp_env2);
+
+ crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+ crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+ if(!crc1_ok && !crc2_ok)
+ return use_default();
+ else if(crc1_ok && !crc2_ok)
+ gd->env_valid = 1;
+ else if(!crc1_ok && crc2_ok)
+ gd->env_valid = 2;
+ else {
+ /* both ok - check serial */
+ if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if(tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if(tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+
+ }
+
+ free(env_ptr);
+ if(gd->env_valid == 1) {
+ env_ptr = tmp_env1;
+ free(tmp_env2);
+ } else {
+ env_ptr = tmp_env2;
+ free(tmp_env1);
+ }
+
+#endif /* ! ENV_IS_EMBEDDED */
+}
+#else /* ! CFG_ENV_OFFSET_REDUND */
+/*
+ * The legacy NAND code saved the environment in the first NAND device i.e.,
+ * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
+ */
void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED)
- int ret, total;
+ ulong total;
+ int ret;
- ret = nand_rw(nand_dev_desc + 0,
- NANDRW_READ | NANDRW_JFFS2, CFG_ENV_OFFSET, CFG_ENV_SIZE,
- &total, (u_char*)env_ptr);
+ total = CFG_ENV_SIZE;
+ ret = nand_read(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);
if (ret || total != CFG_ENV_SIZE)
return use_default();
if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
return use_default();
#endif /* ! ENV_IS_EMBEDDED */
-
}
+#endif /* CFG_ENV_OFFSET_REDUND */
+#if !defined(ENV_IS_EMBEDDED)
static void use_default()
{
- DECLARE_GLOBAL_DATA_PTR;
-
puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
- if (default_environment_size > CFG_ENV_SIZE){
+ if (default_environment_size > CFG_ENV_SIZE){
puts ("*** Error - default environment is too large\n\n");
return;
}
default_environment,
default_environment_size);
env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
- gd->env_valid = 1;
+ gd->env_valid = 1;
}
+#endif
#endif /* CFG_ENV_IS_IN_NAND */
projects / people / ms / u-boot.git / blobdiff