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Diffstat (limited to 'board/xes/common/actl_nand.c')
-rw-r--r--board/xes/common/actl_nand.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/board/xes/common/actl_nand.c b/board/xes/common/actl_nand.c
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+++ b/board/xes/common/actl_nand.c
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+/*
+ * Copyright 2008 Extreme Engineering Solutions, Inc.
+ *
+ * This driver support NAND devices which have address lines
+ * connected as ALE and CLE inputs.
+ *
+ * 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>
+#include <nand.h>
+#include <asm/io.h>
+
+/*
+ * Hardware specific access to control-lines
+ */
+static void nand_addr_hwcontrol(struct mtd_info *mtd, int cmd, uint ctrl)
+{
+ struct nand_chip *this = mtd->priv;
+ ulong IO_ADDR_W;
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ IO_ADDR_W = (ulong)this->IO_ADDR_W;
+
+ IO_ADDR_W &= ~(CONFIG_SYS_NAND_ACTL_CLE |
+ CONFIG_SYS_NAND_ACTL_ALE |
+ CONFIG_SYS_NAND_ACTL_NCE);
+ if (ctrl & NAND_CLE)
+ IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_CLE;
+ if (ctrl & NAND_ALE)
+ IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_ALE;
+ if (ctrl & NAND_NCE)
+ IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_NCE;
+
+ this->IO_ADDR_W = (void *)IO_ADDR_W;
+ }
+
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, this->IO_ADDR_W);
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+ nand->ecc.mode = NAND_ECC_SOFT;
+ nand->cmd_ctrl = nand_addr_hwcontrol;
+ nand->chip_delay = CONFIG_SYS_NAND_ACTL_DELAY;
+
+ return 0;
+}