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-rw-r--r--common/cmd_nand.c107
-rw-r--r--common/env_nand.c46
-rw-r--r--include/environment.h21
-rw-r--r--include/nand.h9
4 files changed, 176 insertions, 7 deletions
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index ea80555..a4c67c1 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -4,6 +4,10 @@
* (c) 1999 Machine Vision Holdings, Inc.
* (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org>
*
+ * Ported 'dynenv' to 'nand env.oob' command
+ * (C) 2010 Nanometrics, Inc.
+ * 'dynenv' -- Dynamic environment offset in NAND OOB
+ * (C) Copyright 2006-2007 OpenMoko, Inc.
* Added 16-bit nand support
* (C) 2004 Texas Instruments
*/
@@ -193,6 +197,90 @@ static void do_nand_status(nand_info_t *nand)
}
#endif
+#ifdef CONFIG_ENV_OFFSET_OOB
+unsigned long nand_env_oob_offset;
+
+int do_nand_env_oob(cmd_tbl_t *cmdtp, nand_info_t *nand,
+ int argc, char * const argv[])
+{
+ int ret;
+ uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
+
+ char *cmd = argv[1];
+
+ if (!strcmp(cmd, "get")) {
+ ret = get_nand_env_oob(nand, &nand_env_oob_offset);
+ if (!ret)
+ printf("0x%08lx\n", nand_env_oob_offset);
+ else
+ return 1;
+ } else if (!strcmp(cmd, "set")) {
+ ulong addr;
+ size_t dummy_size;
+ struct mtd_oob_ops ops;
+
+ if (argc < 3)
+ goto usage;
+
+ if (arg_off_size(argc-2, argv + 2, nand, &addr,
+ &dummy_size) < 0) {
+ printf("Offset or partition name expected\n");
+ return 1;
+ }
+
+ if (nand->oobavail < ENV_OFFSET_SIZE) {
+ printf("Insufficient available OOB bytes: %d OOB bytes"
+ " available but %d required for env.oob support\n",
+ nand->oobavail,
+ ENV_OFFSET_SIZE);
+ return 1;
+ }
+
+ if ((addr & (nand->erasesize - 1)) != 0) {
+ printf("Environment offset must be block-aligned\n");
+ return 1;
+ }
+
+ ops.datbuf = NULL;
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooboffs = 0;
+ ops.ooblen = ENV_OFFSET_SIZE;
+ ops.oobbuf = (void *) oob_buf;
+
+ oob_buf[0] = ENV_OOB_MARKER;
+ oob_buf[1] = addr / nand->erasesize;
+
+ ret = nand->write_oob(nand, ENV_OFFSET_SIZE, &ops);
+ if (!ret) {
+ ret = get_nand_env_oob(nand, &nand_env_oob_offset);
+ if (ret) {
+ printf("Error reading env offset in OOB\n");
+ return ret;
+ }
+
+ if (addr != nand_env_oob_offset) {
+ printf("Verification of env offset in OOB "
+ "failed: 0x%08lx expected but got "
+ "0x%08lx\n", addr, nand_env_oob_offset);
+ return 1;
+ }
+ } else {
+ printf("Error writing OOB block 0\n");
+ return ret;
+ }
+ } else {
+ goto usage;
+ }
+
+ return ret;
+
+usage:
+ cmd_usage(cmdtp);
+ return 1;
+}
+
+#endif
+
static void nand_print_info(int idx)
{
nand_info_t *nand = &nand_info[idx];
@@ -272,9 +360,19 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
strcmp(cmd, "biterr") != 0 &&
- strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0 )
+ strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0
+#ifdef CONFIG_ENV_OFFSET_OOB
+ && strcmp(cmd, "env.oob") != 0
+#endif
+ )
goto usage;
+#ifdef CONFIG_ENV_OFFSET_OOB
+ /* this command operates only on the first nand device */
+ if (strcmp(cmd, "env.oob") == 0)
+ return do_nand_env_oob(cmdtp, &nand_info[0], argc - 1, argv + 1);
+#endif
+
/* the following commands operate on the current device */
if (nand_curr_device < 0 || nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
!nand_info[nand_curr_device].name) {
@@ -502,6 +600,13 @@ U_BOOT_CMD(nand, CONFIG_SYS_MAXARGS, 1, do_nand,
" bring nand to lock state or display locked pages\n"
"nand unlock [offset] [size] - unlock section"
#endif
+#ifdef CONFIG_ENV_OFFSET_OOB
+ "\n"
+ "nand env.oob - environment offset in OOB of block 0 of"
+ " first device.\n"
+ "nand env.oob set off|partition - set enviromnent offset\n"
+ "nand env.oob get - get environment offset"
+#endif
);
static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
diff --git a/common/env_nand.c b/common/env_nand.c
index 50bc111..47d9848 100644
--- a/common/env_nand.c
+++ b/common/env_nand.c
@@ -38,6 +38,7 @@
#include <linux/stddef.h>
#include <malloc.h>
#include <nand.h>
+#include <asm/errno.h>
#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
#define CMD_SAVEENV
@@ -284,6 +285,40 @@ int readenv (size_t offset, u_char * buf)
return 0;
}
+#ifdef CONFIG_ENV_OFFSET_OOB
+int get_nand_env_oob(nand_info_t *nand, unsigned long *result)
+{
+ struct mtd_oob_ops ops;
+ uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
+ int ret;
+
+ ops.datbuf = NULL;
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooboffs = 0;
+ ops.ooblen = ENV_OFFSET_SIZE;
+ ops.oobbuf = (void *) oob_buf;
+
+ ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
+
+ if (!ret) {
+ if (oob_buf[0] == ENV_OOB_MARKER) {
+ *result = oob_buf[1] * nand->erasesize;
+ } else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
+ *result = oob_buf[1];
+ } else {
+ printf("No dynamic environment marker in OOB block 0"
+ "\n");
+ ret = -ENOENT;
+ goto fail;
+ }
+ } else {
+ printf("error reading OOB block 0\n");
+ }
+fail:
+ return ret;
+}
+#endif
+
#ifdef CONFIG_ENV_OFFSET_REDUND
void env_relocate_spec (void)
{
@@ -353,6 +388,17 @@ void env_relocate_spec (void)
#if !defined(ENV_IS_EMBEDDED)
int ret;
+#if defined(CONFIG_ENV_OFFSET_OOB)
+ ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
+ /* If unable to read environment offset from NAND OOB then fall through
+ * to the normal environment reading code below
+ */
+ if (!ret)
+ printf("Found Environment offset in OOB..\n");
+ else
+ return use_default();
+#endif
+
ret = readenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
if (ret)
return use_default();
diff --git a/include/environment.h b/include/environment.h
index 203f731..fbccf6a 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -74,15 +74,24 @@
#endif /* CONFIG_ENV_IS_IN_FLASH */
#if defined(CONFIG_ENV_IS_IN_NAND)
-# ifndef CONFIG_ENV_OFFSET
-# error "Need to define CONFIG_ENV_OFFSET when using CONFIG_ENV_IS_IN_NAND"
-# endif
+# if defined(CONFIG_ENV_OFFSET_OOB)
+# ifdef CONFIG_ENV_OFFSET_REDUND
+# error "CONFIG_ENV_OFFSET_REDUND is not supported when CONFIG_ENV_OFFSET_OOB"
+# error "is set"
+# endif
+extern unsigned long nand_env_oob_offset;
+# define CONFIG_ENV_OFFSET nand_env_oob_offset
+# else
+# ifndef CONFIG_ENV_OFFSET
+# error "Need to define CONFIG_ENV_OFFSET when using CONFIG_ENV_IS_IN_NAND"
+# endif
+# ifdef CONFIG_ENV_OFFSET_REDUND
+# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
+# endif
+# endif /* CONFIG_ENV_OFFSET_OOB */
# ifndef CONFIG_ENV_SIZE
# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_NAND"
# endif
-# ifdef CONFIG_ENV_OFFSET_REDUND
-# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
-# endif
#endif /* CONFIG_ENV_IS_IN_NAND */
#if defined(CONFIG_ENV_IS_IN_MG_DISK)
diff --git a/include/nand.h b/include/nand.h
index 2a81597..8bdf419 100644
--- a/include/nand.h
+++ b/include/nand.h
@@ -130,3 +130,12 @@ void board_nand_select_device(struct nand_chip *nand, int chip);
__attribute__((noreturn)) void nand_boot(void);
#endif
+
+#ifdef CONFIG_ENV_OFFSET_OOB
+#define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored
+ as block number*/
+#define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is
+ stored as byte number */
+#define ENV_OFFSET_SIZE 8
+int get_nand_env_oob(nand_info_t *nand, unsigned long *result);
+#endif
generated by cgit v1.1 at 2024-12-04 17:37:41 +0000