Merge branch 'master' of git://git.denx.de/u-boot-nand-flash

1 files changed, 217 insertions, 0 deletions

diff --git a/drivers/mtd/nand/ndfc.c b/drivers/mtd/nand/ndfc.c
new file mode 100644
index 0000000..528b22b
--- /dev/null
+++ b/drivers/mtd/nand/ndfc.c
@@ -0,0 +1,217 @@
+/*
+ * Overview:
+ *   Platform independend driver for NDFC (NanD Flash Controller)
+ *   integrated into IBM/AMCC PPC4xx cores
+ *
+ * (C) Copyright 2006-2009
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * Based on original work by
+ *	Thomas Gleixner
+ *	Copyright 2006 IBM
+ *
+ * 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 <linux/mtd/ndfc.h>
+#include <linux/mtd/nand_ecc.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <ppc4xx.h>
+
+/*
+ * We need to store the info, which chip-select (CS) is used for the
+ * chip number. For example on Sequoia NAND chip #0 uses
+ * CS #3.
+ */
+static int ndfc_cs[NDFC_MAX_BANKS];
+
+static void ndfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+	struct nand_chip *this = mtd->priv;
+	ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
+
+	if (cmd == NAND_CMD_NONE)
+		return;
+
+	if (ctrl & NAND_CLE)
+		out_8((u8 *)(base + NDFC_CMD), cmd & 0xFF);
+	else
+		out_8((u8 *)(base + NDFC_ALE), cmd & 0xFF);
+}
+
+static int ndfc_dev_ready(struct mtd_info *mtdinfo)
+{
+	struct nand_chip *this = mtdinfo->priv;
+	ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
+
+	return (in_be32((u32 *)(base + NDFC_STAT)) & NDFC_STAT_IS_READY);
+}
+
+static void ndfc_enable_hwecc(struct mtd_info *mtdinfo, int mode)
+{
+	struct nand_chip *this = mtdinfo->priv;
+	ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
+	u32 ccr;
+
+	ccr = in_be32((u32 *)(base + NDFC_CCR));
+	ccr |= NDFC_CCR_RESET_ECC;
+	out_be32((u32 *)(base + NDFC_CCR), ccr);
+}
+
+static int ndfc_calculate_ecc(struct mtd_info *mtdinfo,
+			      const u_char *dat, u_char *ecc_code)
+{
+	struct nand_chip *this = mtdinfo->priv;
+	ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
+	u32 ecc;
+	u8 *p = (u8 *)&ecc;
+
+	ecc = in_be32((u32 *)(base + NDFC_ECC));
+
+	/* The NDFC uses Smart Media (SMC) bytes order
+	 */
+	ecc_code[0] = p[2];
+	ecc_code[1] = p[1];
+	ecc_code[2] = p[3];
+
+	return 0;
+}
+
+/*
+ * Speedups for buffer read/write/verify
+ *
+ * NDFC allows 32bit read/write of data. So we can speed up the buffer
+ * functions. No further checking, as nand_base will always read/write
+ * page aligned.
+ */
+static void ndfc_read_buf(struct mtd_info *mtdinfo, uint8_t *buf, int len)
+{
+	struct nand_chip *this = mtdinfo->priv;
+	ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
+	uint32_t *p = (uint32_t *) buf;
+
+	for (;len > 0; len -= 4)
+		*p++ = in_be32((u32 *)(base + NDFC_DATA));
+}
+
+#ifndef CONFIG_NAND_SPL
+/*
+ * Don't use these speedup functions in NAND boot image, since the image
+ * has to fit into 4kByte.
+ */
+static void ndfc_write_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
+{
+	struct nand_chip *this = mtdinfo->priv;
+	ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
+	uint32_t *p = (uint32_t *) buf;
+
+	for (; len > 0; len -= 4)
+		out_be32((u32 *)(base + NDFC_DATA), *p++);
+}
+
+static int ndfc_verify_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
+{
+	struct nand_chip *this = mtdinfo->priv;
+	ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
+	uint32_t *p = (uint32_t *) buf;
+
+	for (; len > 0; len -= 4)
+		if (*p++ != in_be32((u32 *)(base + NDFC_DATA)))
+			return -1;
+
+	return 0;
+}
+#endif /* #ifndef CONFIG_NAND_SPL */
+
+#ifndef CONFIG_SYS_NAND_BCR
+#define CONFIG_SYS_NAND_BCR 0x80002222
+#endif
+
+void board_nand_select_device(struct nand_chip *nand, int chip)
+{
+	/*
+	 * Don't use "chip" to address the NAND device,
+	 * generate the cs from the address where it is encoded.
+	 */
+	ulong base = (ulong)nand->IO_ADDR_W & 0xffffff00;
+	int cs = ndfc_cs[chip];
+
+	/* Set NandFlash Core Configuration Register */
+	/* 1 col x 2 rows */
+	out_be32((u32 *)(base + NDFC_CCR), 0x00000000 | (cs << 24));
+	out_be32((u32 *)(base + NDFC_BCFG0 + (cs << 2)), CONFIG_SYS_NAND_BCR);
+}
+
+static void ndfc_select_chip(struct mtd_info *mtd, int chip)
+{
+	/*
+	 * Nothing to do here!
+	 */
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+	int cs = (ulong)nand->IO_ADDR_W & 0x00000003;
+	ulong base = (ulong)nand->IO_ADDR_W & 0xffffff00;
+	static int chip = 0;
+
+	/*
+	 * Save chip-select for this chip #
+	 */
+	ndfc_cs[chip] = cs;
+
+	/*
+	 * Select required NAND chip in NDFC
+	 */
+	board_nand_select_device(nand, chip);
+
+	nand->IO_ADDR_R = (void __iomem *)(base + NDFC_DATA);
+	nand->IO_ADDR_W = (void __iomem *)(base + NDFC_DATA);
+	nand->cmd_ctrl = ndfc_hwcontrol;
+	nand->chip_delay = 50;
+	nand->read_buf = ndfc_read_buf;
+	nand->dev_ready = ndfc_dev_ready;
+	nand->ecc.correct = nand_correct_data;
+	nand->ecc.hwctl = ndfc_enable_hwecc;
+	nand->ecc.calculate = ndfc_calculate_ecc;
+	nand->ecc.mode = NAND_ECC_HW;
+	nand->ecc.size = 256;
+	nand->ecc.bytes = 3;
+	nand->select_chip = ndfc_select_chip;
+
+#ifndef CONFIG_NAND_SPL
+	nand->write_buf  = ndfc_write_buf;
+	nand->verify_buf = ndfc_verify_buf;
+#else
+	/*
+	 * Setup EBC (CS0 only right now)
+	 */
+	mtebc(EBC0_CFG, 0xb8400000);
+
+	mtebc(pb0cr, CONFIG_SYS_EBC_PB0CR);
+	mtebc(pb0ap, CONFIG_SYS_EBC_PB0AP);
+#endif
+
+	chip++;
+
+	return 0;
+}