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authorPrafulla Wadaskar <prafulla@marvell.com>2009-06-29 15:25:18 +0530
committerJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2009-07-08 21:20:10 +0200
commit205a0988d8fd778c60746c34c2f17dbd2b7cd0d2 (patch)
tree113ae9662bb1ae571e76a67decb3567f26ab76fa /drivers/mtd/nand/kirkwood_nand.c
parent59869ca72df8bc4e4ffa9dd17cb6673bbe010272 (diff)
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nand: Add Marvell Kirkwood NAND driver
This patch adds a NAND driver for the Marvell Kirkwood SoC's Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com> Acked-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'drivers/mtd/nand/kirkwood_nand.c')
-rw-r--r--drivers/mtd/nand/kirkwood_nand.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/mtd/nand/kirkwood_nand.c b/drivers/mtd/nand/kirkwood_nand.c
new file mode 100644
index 0000000..376378e
--- /dev/null
+++ b/drivers/mtd/nand/kirkwood_nand.c
@@ -0,0 +1,82 @@
+/*
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.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>
+#include <asm/io.h>
+#include <asm/arch/kirkwood.h>
+#include <nand.h>
+
+/* NAND Flash Soc registers */
+struct kwnandf_registers {
+ u32 rd_params; /* 0x10418 */
+ u32 wr_param; /* 0x1041c */
+ u8 pad[0x10470 - 0x1041c - 4];
+ u32 ctrl; /* 0x10470 */
+};
+
+static struct kwnandf_registers *nf_reg =
+ (struct kwnandf_registers *)KW_NANDF_BASE;
+
+/*
+ * hardware specific access to control-lines/bits
+ */
+#define NAND_ACTCEBOOT_BIT 0x02
+
+static void kw_nand_hwcontrol(struct mtd_info *mtd, int cmd,
+ unsigned int ctrl)
+{
+ struct nand_chip *nc = mtd->priv;
+ u32 offs;
+
+ if (cmd == NAND_CMD_NONE)
+ return;
+
+ if (ctrl & NAND_CLE)
+ offs = (1 << 0); /* Commands with A[1:0] == 01 */
+ else if (ctrl & NAND_ALE)
+ offs = (1 << 1); /* Addresses with A[1:0] == 10 */
+ else
+ return;
+
+ writeb(cmd, nc->IO_ADDR_W + offs);
+}
+
+void kw_nand_select_chip(struct mtd_info *mtd, int chip)
+{
+ u32 data;
+
+ data = readl(&nf_reg->ctrl);
+ data |= NAND_ACTCEBOOT_BIT;
+ writel(data, &nf_reg->ctrl);
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+ nand->options = NAND_COPYBACK | NAND_CACHEPRG | NAND_NO_PADDING;
+ nand->ecc.mode = NAND_ECC_SOFT;
+ nand->cmd_ctrl = kw_nand_hwcontrol;
+ nand->chip_delay = 30;
+ nand->select_chip = kw_nand_select_chip;
+ return 0;
+}