init commit via android 4.4 uboot

1 files changed, 253 insertions, 0 deletions

diff --git a/common/env_nand.c b/common/env_nand.c
new file mode 100755
index 0000000..1e66ab2
--- /dev/null
+++ b/common/env_nand.c
@@ -0,0 +1,253 @@
+/*
+ * (C) Copyright 2004
+ * Jian Zhang, Texas Instruments, jzhang@ti.com.
+
+ * (C) Copyright 2000-2004
+ * 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
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+
+#if defined(CFG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */
+
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <linux/mtd/nand.h>
+
+#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_NAND)) == (CFG_CMD_ENV|CFG_CMD_NAND))
+#define CMD_SAVEENV
+#endif
+
+#if defined(CFG_ENV_SIZE_REDUND)
+#error CFG_ENV_SIZE_REDUND  not supported yet
+#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
+#define NANDRW_JFFS2_SKIP	0x04
+unsigned int env_blk_pos = 0; /*searched env block position*/
+extern struct nand_chip nand_dev_desc[];
+int nand_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);
+int check_block_table(struct nand_chip *nand, unsigned int scan);
+/* references to names in env_common.c */
+extern uchar default_environment[];
+extern int default_environment_size;
+
+char * env_name_spec = "NAND";
+
+
+#ifdef ENV_IS_EMBEDDED
+extern uchar environment[];
+env_t *env_ptr = (env_t *)(&environment[0]);
+#else /* ! ENV_IS_EMBEDDED */
+env_t *env_ptr = 0;
+#endif /* ENV_IS_EMBEDDED */
+
+
+/* local functions */
+static void use_default(void);
+
+DECLARE_GLOBAL_DATA_PTR;
+
+uchar env_get_char_spec (int index)
+{
+	return ( *((uchar *)(gd->env_addr + index)) );
+}
+
+
+/* this is called before nand_init()
+ * so we can't read Nand to validate env data.
+ * Mark it OK for now. env_relocate() in env_common.c
+ * will call our relocate function which will does
+ * the real validation.
+ */
+int env_init(void)
+{
+	gd->env_addr  = (ulong)&default_environment[0];
+	gd->env_valid = 1;
+
+	return (0);
+}
+
+#ifdef CMD_SAVEENV
+int saveenv(void)
+{
+	int ret = 0;
+	unsigned int total, i, index;
+	
+	NAND_ENABLE_CE(nand_dev_desc);
+	ret = check_block_table(nand_dev_desc, 0);
+	NAND_DISABLE_CE(nand_dev_desc);
+	if (ret) {
+		printf("bbt not found! Write ENV is rejected\n");
+		return 1;
+	}
+
+	total = CFG_ENV_SIZE;
+ 	index = (env_blk_pos+1)%CFG_ENV_BLOCK_LENGTH;
+ 	printf ("Erasing next Nand block 0x%x\n", index);
+ 	for (i = 0; i < CFG_ENV_BLOCK_LENGTH; i++) {
+		if (!nand_dev_desc[0].isbadblock((nand_dev_desc + 0),
+		nand_dev_desc[0].erasesize * (CFG_ENV_BLOCK_OFFSET + index%CFG_ENV_BLOCK_LENGTH))) {
+		 	if (nand_erase(nand_dev_desc + 0,
+		 	nand_dev_desc[0].erasesize * (CFG_ENV_BLOCK_OFFSET + index%CFG_ENV_BLOCK_LENGTH),
+		 	(CFG_ENV_SIZE/nand_dev_desc[0].erasesize) + 
+		 	((CFG_ENV_SIZE%nand_dev_desc[0].erasesize) ? nand_dev_desc[0].erasesize : 0), 0)) {
+		 		/* fixme add bad block into bbt */
+		 		puts ("Erasing Nand next block fail..");
+		 		return 1;
+			} else {
+				ret = 1;
+				break;
+		 	}
+	 	}
+	 	index++;
+	}
+	if (!ret)
+		return 1;
+
+	/*printf ("write nand env_ptr addr 0x%x\n", (unsigned int)env_ptr);*/
+	ret = nand_rw(nand_dev_desc + 0,
+				NANDRW_WRITE | NANDRW_JFFS2, nand_dev_desc[0].erasesize *
+				(CFG_ENV_BLOCK_OFFSET + index%CFG_ENV_BLOCK_LENGTH), CFG_ENV_SIZE,
+			      &total, (u_char *)env_ptr);
+	//ret = WMTSaveImageToNAND(nand_dev_desc[0].erasesize * CFG_ENV_BLOCK_OFFSET,
+	//(u_char*)env_ptr,	CFG_ENV_SIZE, 1);
+  if (ret || total != CFG_ENV_SIZE) {
+  	printf ("ret =0x%x total= 0x%x\n", (int) ret, total);
+		return 1;
+	}
+	printf ("Erase original Nand env_blk_pos=0x%x", env_blk_pos);
+	if (!nand_dev_desc[0].isbadblock((nand_dev_desc + 0),
+		nand_dev_desc[0].erasesize * (CFG_ENV_BLOCK_OFFSET + env_blk_pos))) {
+		 	if (nand_erase(nand_dev_desc + 0,
+		 	nand_dev_desc[0].erasesize * (CFG_ENV_BLOCK_OFFSET + env_blk_pos),
+		 	(CFG_ENV_SIZE/nand_dev_desc[0].erasesize) + 
+		 	((CFG_ENV_SIZE%nand_dev_desc[0].erasesize) ? nand_dev_desc[0].erasesize : 0), 0)) {
+		 		/* fixme add bad block into bbt */
+		 		puts ("Erasing Nand original block fail..");
+		 		return 1;
+			} else {
+				env_blk_pos++;
+				puts (" ...done\n");
+				return 0;
+		 	}
+	 	}
+
+ 	puts ("original nand env block is bad block\n");
+  return 1;
+}
+#endif /* CMD_SAVEENV */
+
+
+void env_relocate_spec (void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+	int ret = 0;
+	unsigned int total, i = 0;
+	total = 0;
+	/*env_blk_pos = 0;*/
+	/*WMTLoadImageFormNAND(nand_dev_desc + 0, 
+	nand_dev_desc[0].erasesize * CFG_ENV_BLOCK_OFFSET,
+	(u_char*)env_ptr, CFG_ENV_SIZE);*/
+	NAND_ENABLE_CE(nand_dev_desc);
+	ret = check_block_table(nand_dev_desc, 0);
+	NAND_DISABLE_CE(nand_dev_desc);
+	if (ret) {
+		printf("bbt not found! Search ENV is rejected\n");
+		return use_default();
+	}
+	for (i = 0; i < (CFG_ENV_BLOCK_LENGTH*2); i++) {
+		/*printf("i = %d\n", i);*/
+		if (nand_dev_desc[0].isbadblock((nand_dev_desc + 0),
+		nand_dev_desc[0].erasesize * (CFG_ENV_BLOCK_OFFSET + i%CFG_ENV_BLOCK_LENGTH))) {
+			printf(" search env block = 0x%x+1 is bad\n", env_blk_pos);
+			continue;
+	 	}
+		/*printf("i1 = %d\n", i);*/
+		ret = nand_rw(nand_dev_desc + 0, NANDRW_READ | NANDRW_JFFS2 | NANDRW_JFFS2_SKIP,
+					nand_dev_desc[0].erasesize * (CFG_ENV_BLOCK_OFFSET + i%CFG_ENV_BLOCK_LENGTH),
+					CFG_ENV_SIZE, &total, (u_char*)env_ptr);
+		if (ret || (total != CFG_ENV_SIZE)) {
+	  	printf ("ret =0x%x total= 0x%x\n", (int) ret, total);
+	  	env_blk_pos = 0;
+			return use_default();
+		}
+		if ((env_ptr->crc == 0xFFFFFFFF) && (i < CFG_ENV_BLOCK_LENGTH))
+			continue;
+
+		if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) {
+			if (i < (CFG_ENV_BLOCK_LENGTH*2 - 1))
+				continue;
+			printf("could not search env nand block\n");
+			env_blk_pos = 0;
+			return use_default();
+		} else {
+			env_blk_pos = i%CFG_ENV_BLOCK_LENGTH;
+			printf("env is read from nand block 0x%x+1 \n", env_blk_pos);
+			return;
+		}
+	}
+	return use_default();
+#endif /* ! ENV_IS_EMBEDDED */
+
+}
+
+static void use_default()
+{
+	puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
+
+  	if (default_environment_size > CFG_ENV_SIZE){
+		puts ("*** Error - default environment is too large\n\n");
+		return;
+	}
+
+	memset (env_ptr, 0, sizeof(env_t));
+	memcpy (env_ptr->data,
+			default_environment,
+			default_environment_size);
+	env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
+ 	gd->env_valid = 1;
+
+}
+
+#endif /* CFG_ENV_IS_IN_NAND */