OneNAND support (take #2)

[PATCH 3/3] OneNAND support (take #2)

OneNAND support at U-Boot

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

1 files changed, 134 insertions, 0 deletions

diff --git a/common/env_onenand.c b/common/env_onenand.c
new file mode 100644
index 0000000000..66107f91f1
--- /dev/null
+++ b/common/env_onenand.c
@@ -0,0 +1,134 @@
+/*
+ * (C) Copyright 2005-2007 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ * 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
+ */
+
+#include <common.h>
+
+#if defined(CFG_ENV_IS_IN_ONENAND)	/* Environment is in OneNAND */
+
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <malloc.h>
+
+#include <linux/mtd/compat.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/onenand.h>
+
+extern struct mtd_info onenand_mtd;
+extern struct onenand_chip onenand_chip;
+
+/* References to names in env_common.c */
+extern uchar default_environment[];
+
+#define ONENAND_ENV_SIZE(mtd)	(mtd.oobblock - ENV_HEADER_SIZE)
+
+char *env_name_spec = "OneNAND";
+
+#ifdef ENV_IS_EMBEDDED
+extern uchar environment[];
+env_t *env_ptr = (env_t *) (&environment[0]);
+#else /* ! ENV_IS_EMBEDDED */
+static unsigned char onenand_env[MAX_ONENAND_PAGESIZE];
+env_t *env_ptr = (env_t *) onenand_env;
+#endif /* ENV_IS_EMBEDDED */
+
+uchar env_get_char_spec(int index)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	return (*((uchar *) (gd->env_addr + index)));
+}
+
+void env_relocate_spec(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	unsigned long env_addr;
+	int use_default = 0;
+	int retlen;
+
+	env_addr = CFG_ENV_ADDR;
+	env_addr -= (unsigned long)onenand_chip.base;
+
+	/* Check OneNAND exist */
+	if (onenand_mtd.oobblock)
+		/* Ignore read fail */
+		onenand_read(&onenand_mtd, env_addr, onenand_mtd.oobblock,
+			     &retlen, (u_char *) env_ptr);
+	else
+		onenand_mtd.oobblock = MAX_ONENAND_PAGESIZE;
+
+	if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd)) !=
+	    env_ptr->crc)
+		use_default = 1;
+
+	if (use_default) {
+		memcpy(env_ptr->data, default_environment,
+		       ONENAND_ENV_SIZE(onenand_mtd));
+		env_ptr->crc =
+		    crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd));
+	}
+
+	gd->env_addr = (ulong) & env_ptr->data;
+	gd->env_valid = 1;
+}
+
+int saveenv(void)
+{
+	unsigned long env_addr = CFG_ENV_ADDR;
+	struct erase_info instr;
+	int retlen;
+
+	instr.len = CFG_ENV_SIZE;
+	instr.addr = env_addr;
+	instr.addr -= (unsigned long)onenand_chip.base;
+	if (onenand_erase(&onenand_mtd, &instr)) {
+		printf("OneNAND: erase failed at 0x%08x\n", env_addr);
+		return 1;
+	}
+
+	/* update crc */
+	env_ptr->crc =
+	    crc32(0, env_ptr->data, onenand_mtd.oobblock - ENV_HEADER_SIZE);
+
+	env_addr -= (unsigned long)onenand_chip.base;
+	if (onenand_write(&onenand_mtd, env_addr, onenand_mtd.oobblock, &retlen,
+	     (u_char *) env_ptr)) {
+		printf("OneNAND: write failed at 0x%08x\n", instr.addr);
+		return 2;
+	}
+
+	return 0;
+}
+
+int env_init(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	/* use default */
+	gd->env_addr = (ulong) & default_environment[0];
+	gd->env_valid = 1;
+
+	return 0;
+}
+
+#endif /* CFG_ENV_IS_IN_ONENAND */