[U-Boot] [PATCHv3 3/3] 83xx, kmeter1: added NAND support
Heiko Schocher
hs at denx.de
Mon Jul 13 12:15:12 CEST 2009
Signed-off-by: Heiko Schocher <hs at denx.de>
---
- changes since v1:
moved the nand driver to drivers/mtd/nand/kmeter1_nand.c
as Stefan Roese suggested
- changes since v2:
added comments from Stefan Roese
- drivers/mtd/nand/kmeter1_nand.c only gets compiled if
CONFIG_NAND_KMETER1 is set in board config file
- Fix Coding Style issue
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/kmeter1_nand.c | 148 +++++++++++++++++++++++++++++++++++++++
include/configs/kmeter1.h | 6 ++
3 files changed, 155 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/nand/kmeter1_nand.c
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index c1325b9..c85e3d5 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -40,6 +40,7 @@ COBJS-$(CONFIG_DRIVER_NAND_BFIN) += bfin_nand.o
COBJS-$(CONFIG_NAND_DAVINCI) += davinci_nand.o
COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_nand.o
COBJS-$(CONFIG_NAND_FSL_UPM) += fsl_upm.o
+COBJS-$(CONFIG_NAND_KMETER1) += kmeter1_nand.o
COBJS-$(CONFIG_NAND_MPC5121_NFC) += mpc5121_nfc.o
COBJS-$(CONFIG_NAND_NOMADIK) += nomadik.o
COBJS-$(CONFIG_NAND_S3C2410) += s3c2410_nand.o
diff --git a/drivers/mtd/nand/kmeter1_nand.c b/drivers/mtd/nand/kmeter1_nand.c
new file mode 100644
index 0000000..7e7b199
--- /dev/null
+++ b/drivers/mtd/nand/kmeter1_nand.c
@@ -0,0 +1,148 @@
+/*
+ * (C) Copyright 2009
+ * Heiko Schocher, DENX Software Engineering, hs at denx.de
+ *
+ * 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>
+
+#define CONFIG_NAND_MODE_REG (CONFIG_SYS_NAND_BASE + 0x20000)
+#define CONFIG_NAND_DATA_REG (CONFIG_SYS_NAND_BASE + 0x30000)
+
+#define read_mode() in_8((volatile unsigned char __iomem *) \
+ CONFIG_NAND_MODE_REG)
+#define write_mode(val) out_8((volatile unsigned char __iomem *) \
+ CONFIG_NAND_MODE_REG, val)
+#define read_data() in_8((volatile unsigned char __iomem *) \
+ CONFIG_NAND_DATA_REG)
+#define write_data(val) out_8((volatile unsigned char __iomem *) \
+ CONFIG_NAND_DATA_REG, val)
+
+#define KPN_RDY2 (1 << 7)
+#define KPN_RDY1 (1 << 6)
+#define KPN_WPN (1 << 4)
+#define KPN_CE2N (1 << 3)
+#define KPN_CE1N (1 << 2)
+#define KPN_ALE (1 << 1)
+#define KPN_CLE (1 << 0)
+
+#define KPN_DEFAULT_CHIP_DELAY 50
+
+static int kpn_chip_ready(void)
+{
+ if (read_mode() & KPN_RDY1)
+ return 1;
+
+ return 0;
+}
+
+static void kpn_wait_rdy(void)
+{
+ int cnt = 1000000;
+
+ while (--cnt && !kpn_chip_ready())
+ udelay(1);
+
+ if (!cnt)
+ printf ("timeout while waiting for RDY\n");
+}
+
+static void kpn_nand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+ u8 reg_val = read_mode();
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ if ( ctrl & NAND_NCE)
+ reg_val = reg_val & ~KPN_CE1N;
+ else
+ reg_val = reg_val | KPN_CE1N;
+ write_mode(reg_val);
+ }
+ if (cmd == NAND_CMD_NONE)
+ return;
+
+ reg_val = reg_val & ~(KPN_ALE + KPN_CLE);
+ if (ctrl & NAND_CLE)
+ reg_val = reg_val | KPN_CLE;
+ if (ctrl & NAND_ALE)
+ reg_val = reg_val | KPN_ALE;
+
+ /* select register */
+ write_mode(reg_val);
+
+ /* write cmd */
+ write_data(cmd);
+
+ /* deselect register */
+ reg_val = reg_val & ~(KPN_ALE + KPN_CLE);
+ write_mode(reg_val);
+
+ /* wait until flash is ready */
+ kpn_wait_rdy();
+}
+
+static u_char kpn_nand_read_byte(struct mtd_info *mtd)
+{
+ return read_data();
+}
+
+static void kpn_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++) {
+ write_data(buf[i]);
+ kpn_wait_rdy();
+ }
+}
+
+static void kpn_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ buf[i] = read_data();
+}
+
+static int kpn_nand_dev_ready(struct mtd_info *mtd)
+{
+ kpn_wait_rdy();
+
+ return 1;
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+ nand->ecc.mode = NAND_ECC_SOFT;
+
+ /* Reference hardware control function */
+ nand->cmd_ctrl = kpn_nand_hwcontrol;
+ nand->read_byte = kpn_nand_read_byte;
+ nand->write_buf = kpn_nand_write_buf;
+ nand->read_buf = kpn_nand_read_buf;
+ nand->dev_ready = kpn_nand_dev_ready;
+ nand->chip_delay = KPN_DEFAULT_CHIP_DELAY;
+
+ /* reset mode register */
+ write_mode(KPN_CE1N + KPN_CE2N + KPN_WPN);
+ return 0;
+}
diff --git a/include/configs/kmeter1.h b/include/configs/kmeter1.h
index 811ba88..4de0dfc 100644
--- a/include/configs/kmeter1.h
+++ b/include/configs/kmeter1.h
@@ -324,6 +324,12 @@
#define CONFIG_SYS_DTT_HYSTERESIS 3
#define CONFIG_SYS_DTT_BUS_NUM (CONFIG_SYS_MAX_I2C_BUS)
+#if defined(CONFIG_CMD_NAND)
+#define CONFIG_NAND_KMETER1
+#define CONFIG_SYS_MAX_NAND_DEVICE 1
+#define CONFIG_SYS_NAND_BASE CONFIG_SYS_PIGGY_BASE
+#endif
+
#if defined(CONFIG_PCI)
#define CONFIG_CMD_PCI
#endif
--
1.6.0.6
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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