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>
diff --git a/common/env_onenand.c b/common/env_onenand.c
new file mode 100644
index 0000000..66107f9
--- /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 */
