MIPS: Add VCT board series support (Part 1/3)

Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 198 insertions, 0 deletions

diff --git a/board/micronas/vct/ebi_onenand.c b/board/micronas/vct/ebi_onenand.c
new file mode 100644
index 0000000..522b88f
--- /dev/null
+++ b/board/micronas/vct/ebi_onenand.c
@@ -0,0 +1,198 @@
+/*
+ * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
+ *
+ * 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 <linux/mtd/mtd.h>
+#include <linux/mtd/onenand.h>
+#include "vct.h"
+
+#define BURST_SIZE_WORDS		4
+
+static u16 ebi_nand_read_word(void __iomem *addr)
+{
+	reg_write(EBI_CPU_IO_ACCS(EBI_BASE), (EXT_DEVICE_CHANNEL_2 | (u32)addr));
+	ebi_wait();
+
+	return reg_read(EBI_IO_ACCS_DATA(EBI_BASE)) >> 16;
+}
+
+static void ebi_nand_write_word(u16 data, void __iomem * addr)
+{
+	ebi_wait();
+	reg_write(EBI_IO_ACCS_DATA(EBI_BASE), (data << 16));
+	reg_write(EBI_CPU_IO_ACCS(EBI_BASE),
+		  EXT_DEVICE_CHANNEL_2 | EBI_CPU_WRITE | (u32)addr);
+	ebi_wait();
+}
+
+/*
+ * EBI initialization for OneNAND FLASH access
+ */
+int ebi_init_onenand(void)
+{
+	reg_write(EBI_DEV1_CONFIG1(EBI_BASE), 0x83000);
+
+	reg_write(EBI_DEV2_CONFIG1(EBI_BASE), 0x00403002);
+	reg_write(EBI_DEV2_CONFIG2(EBI_BASE), 0x50);
+
+	reg_write(EBI_DEV3_CONFIG1(EBI_BASE), 0x00403002);
+	reg_write(EBI_DEV3_CONFIG2(EBI_BASE), 0x0); /* byte/word ordering */
+
+	reg_write(EBI_DEV2_TIM1_RD1(EBI_BASE), 0x00504000);
+	reg_write(EBI_DEV2_TIM1_RD2(EBI_BASE), 0x00001000);
+	reg_write(EBI_DEV2_TIM1_WR1(EBI_BASE), 0x12002223);
+	reg_write(EBI_DEV2_TIM1_WR2(EBI_BASE), 0x3FC02220);
+	reg_write(EBI_DEV3_TIM1_RD1(EBI_BASE), 0x00504000);
+	reg_write(EBI_DEV3_TIM1_RD2(EBI_BASE), 0x00001000);
+	reg_write(EBI_DEV3_TIM1_WR1(EBI_BASE), 0x05001000);
+	reg_write(EBI_DEV3_TIM1_WR2(EBI_BASE), 0x00010200);
+
+	reg_write(EBI_DEV2_TIM_EXT(EBI_BASE), 0xFFF00000);
+	reg_write(EBI_DEV2_EXT_ACC(EBI_BASE), 0x0FFFFFFF);
+
+	reg_write(EBI_DEV3_TIM_EXT(EBI_BASE), 0xFFF00000);
+	reg_write(EBI_DEV3_EXT_ACC(EBI_BASE), 0x0FFFFFFF);
+
+	/* prepare DMA configuration for EBI */
+	reg_write(EBI_DEV3_FIFO_CONFIG(EBI_BASE), 0x0101ff00);
+
+	/* READ only no byte order change, TAG 1 used */
+	reg_write(EBI_DEV3_DMA_CONFIG2(EBI_BASE), 0x00000004);
+
+	reg_write(EBI_TAG1_SYS_ID(EBI_BASE), 0x0); /* SCC DMA channel 0 */
+	reg_write(EBI_TAG2_SYS_ID(EBI_BASE), 0x1);
+	reg_write(EBI_TAG3_SYS_ID(EBI_BASE), 0x2);
+	reg_write(EBI_TAG4_SYS_ID(EBI_BASE), 0x3);
+
+	return 0;
+}
+
+static void *memcpy_16_from_onenand(void *dst, const void *src, unsigned int len)
+{
+	void *ret = dst;
+	u16 *d = dst;
+	u16 *s = (u16 *)src;
+
+	len >>= 1;
+	while (len-- > 0)
+		*d++ = ebi_nand_read_word(s++);
+
+	return ret;
+}
+
+static void *memcpy_32_from_onenand(void *dst, const void *src, unsigned int len)
+{
+	void *ret = dst;
+	u32 *d = (u32 *)dst;
+	u32 s = (u32)src;
+	u32 bytes_per_block = BURST_SIZE_WORDS * sizeof(int);
+	u32 n_blocks = len / bytes_per_block;
+	u32 block = 0;
+	u32 burst_word;
+
+	for (block = 0; block < n_blocks; block++) {
+		/* Trigger read channel 3 */
+		reg_write(EBI_CPU_IO_ACCS(EBI_BASE),
+			  (EXT_DEVICE_CHANNEL_3 | (s + (block * bytes_per_block))));
+		/* Poll status to see whether read has finished */
+		ebi_wait();
+
+		/* Squirrel the data away in a safe place */
+		for (burst_word = 0; burst_word < BURST_SIZE_WORDS; burst_word++)
+			*d++ = reg_read(EBI_IO_ACCS_DATA(EBI_BASE));
+	}
+
+	return ret;
+}
+
+static void *memcpy_16_to_onenand(void *dst, const void *src, unsigned int len)
+{
+	void *ret = dst;
+	u16 *d = dst;
+	u16 *s = (u16 *)src;
+
+	len >>= 1;
+	while (len-- > 0)
+		ebi_nand_write_word(*s++, d++);
+
+	return ret;
+}
+
+static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area)
+{
+	struct onenand_chip *this = mtd->priv;
+
+	if (ONENAND_CURRENT_BUFFERRAM(this)) {
+		if (area == ONENAND_DATARAM)
+			return mtd->writesize;
+		if (area == ONENAND_SPARERAM)
+			return mtd->oobsize;
+	}
+
+	return 0;
+}
+
+static int ebi_read_bufferram(struct mtd_info *mtd, loff_t addr, int area,
+			      unsigned char *buffer, int offset,
+			      size_t count)
+{
+	struct onenand_chip *this = mtd->priv;
+	void __iomem *bufferram;
+
+	bufferram = this->base + area;
+	bufferram += onenand_bufferram_offset(mtd, area);
+
+	if (count < 4)
+		memcpy_16_from_onenand(buffer, bufferram + offset, count);
+	else
+		memcpy_32_from_onenand(buffer, bufferram + offset, count);
+
+	return 0;
+}
+
+static int ebi_write_bufferram(struct mtd_info *mtd, loff_t addr, int area,
+			       const unsigned char *buffer, int offset,
+			       size_t count)
+{
+	struct onenand_chip *this = mtd->priv;
+	void __iomem *bufferram;
+
+	bufferram = this->base + area;
+	bufferram += onenand_bufferram_offset(mtd, area);
+
+	memcpy_16_to_onenand(bufferram + offset, buffer, count);
+
+	return 0;
+}
+
+void onenand_board_init(struct mtd_info *mtd)
+{
+	struct onenand_chip *chip = mtd->priv;
+
+	/*
+	 * Insert board specific OneNAND access functions
+	 */
+	chip->read_word = ebi_nand_read_word;
+	chip->write_word = ebi_nand_write_word;
+
+	chip->read_bufferram = ebi_read_bufferram;
+	chip->read_spareram = ebi_read_bufferram;
+	chip->write_bufferram = ebi_write_bufferram;
+}