Added NAND support

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>

1 files changed, 115 insertions, 0 deletions

diff --git a/board/freescale/m5329evb/nand.c b/board/freescale/m5329evb/nand.c
new file mode 100644
index 0000000..2a4ca71
--- /dev/null
+++ b/board/freescale/m5329evb/nand.c
@@ -0,0 +1,115 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.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 <config.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/immap.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if (CONFIG_COMMANDS & CFG_CMD_NAND)
+#include <nand.h>
+#include <linux/mtd/mtd.h>
+
+#define SET_CLE        0x10
+#define CLR_CLE        ~SET_CLE
+#define SET_ALE        0x08
+#define CLR_ALE        ~SET_ALE
+
+static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd)
+{
+       struct nand_chip *this = mtdinfo->priv;
+       volatile fbcs_t *fbcs = (fbcs_t *) MMAP_FBCS;
+       u32 nand_baseaddr = (u32) this->IO_ADDR_W;
+
+       switch (cmd) {
+       case NAND_CTL_SETNCE:
+       case NAND_CTL_CLRNCE:
+               break;
+       case NAND_CTL_SETCLE:
+               nand_baseaddr |= SET_CLE;
+               break;
+       case NAND_CTL_CLRCLE:
+               nand_baseaddr &= CLR_CLE;
+               break;
+       case NAND_CTL_SETALE:
+               nand_baseaddr |= SET_ALE;
+               break;
+       case NAND_CTL_CLRALE:
+               nand_baseaddr |= CLR_ALE;
+               break;
+       case NAND_CTL_SETWP:
+               fbcs->csmr2 |= CSMR_WP;
+               break;
+       case NAND_CTL_CLRWP:
+               fbcs->csmr2 &= ~CSMR_WP;
+               break;
+       }
+       this->IO_ADDR_W = (void __iomem *)(nand_baseaddr);
+}
+
+static void nand_write_byte(struct mtd_info *mtdinfo, u_char byte)
+{
+       struct nand_chip *this = mtdinfo->priv;
+       *((volatile u8 *)(this->IO_ADDR_W)) = byte;
+}
+
+static u8 nand_read_byte(struct mtd_info *mtdinfo)
+{
+       struct nand_chip *this = mtdinfo->priv;
+       return (u8) (*((volatile u8 *)this->IO_ADDR_R));
+}
+
+static int nand_dev_ready(struct mtd_info *mtdinfo)
+{
+       return 1;
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+       volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
+
+       *((volatile u16 *)CFG_LATCH_ADDR) |= 0x0004;
+
+       /* set up pin configuration */
+       gpio->par_timer &= ~GPIO_PAR_TIN3_TIN3;
+       gpio->pddr_timer |= 0x08;
+       gpio->ppd_timer |= 0x08;
+       gpio->pclrr_timer = 0;
+       gpio->podr_timer = 0;
+
+       nand->chip_delay = 50;
+       nand->eccmode = NAND_ECC_SOFT;
+       nand->hwcontrol = nand_hwcontrol;
+       nand->read_byte = nand_read_byte;
+       nand->write_byte = nand_write_byte;
+       nand->dev_ready = nand_dev_ready;
+
+       return 0;
+}
+#endif
+