From 4bdaaba26f5d015474dbd5a524355b5e64655ebe Mon Sep 17 00:00:00 2001
From: Fred Fan <r01011@freescale.com>
Date: Mon, 23 Feb 2009 13:40:12 +0800
Subject: ENGR00099697 Add nand driver for mx35

Add nand driver for mx35

Signed-off-by:Jason Liu <r64343@freescale.com>
---
 include/asm-arm/arch-mx35/mx35.h     |   8 ++
 include/asm-arm/arch-mx35/mxc_nand.h | 198 +++++++++++++++++++++++++++++++++++
 2 files changed, 206 insertions(+)
 create mode 100644 include/asm-arm/arch-mx35/mxc_nand.h

(limited to 'include/asm-arm')

diff --git a/include/asm-arm/arch-mx35/mx35.h b/include/asm-arm/arch-mx35/mx35.h
index a6af3c9..ba30597 100644
--- a/include/asm-arm/arch-mx35/mx35.h
+++ b/include/asm-arm/arch-mx35/mx35.h
@@ -189,6 +189,14 @@ MXC_IPG_PERCLK,
 MXC_UART_CLK,
 };
 
+/*!
+ * NFMS bit in RCSR register for pagesize of nandflash
+ */
+#define NFMS            (*((volatile u32 *)(CCM_BASE_ADDR+0x18)))
+#define NFMS_BIT                8
+#define NFMS_NF_DWIDTH          14
+#define NFMS_NF_PG_SZ           8
+
 extern unsigned int mxc_get_clock(enum mxc_clock clk);
 
 #define fixup_before_linux	\
diff --git a/include/asm-arm/arch-mx35/mxc_nand.h b/include/asm-arm/arch-mx35/mxc_nand.h
new file mode 100644
index 0000000..f4d2ae7
--- /dev/null
+++ b/include/asm-arm/arch-mx35/mxc_nand.h
@@ -0,0 +1,198 @@
+/*
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*!
+ * @file mxc_nd2.h
+ *
+ * @brief This file contains the NAND Flash Controller register information.
+ *
+ *
+ * @ingroup NAND_MTD
+ */
+
+#ifndef __MXC_NAND_H__
+#define __MXC_NAND_H__
+
+#include <asm/arch/mx35.h>
+
+#define IS_2K_PAGE_NAND         ((mtd->oobblock / info->num_of_intlv) \
+						== NAND_PAGESIZE_2KB)
+#define IS_4K_PAGE_NAND         ((mtd->oobblock / info->num_of_intlv) \
+						== NAND_PAGESIZE_4KB)
+#define IS_LARGE_PAGE_NAND      ((mtd->oobblock / info->num_of_intlv) > 512)
+
+#define NAND_PAGESIZE_2KB	2048
+#define NAND_PAGESIZE_4KB	4096
+#define NAND_MAX_PAGESIZE	4096
+
+/*
+ * Addresses for NFC registers
+ */
+#define NFC_REG_BASE			(NFC_BASE_ADDR + 0x1000)
+#define NFC_BUF_ADDR            	(NFC_REG_BASE + 0xE04)
+#define NFC_FLASH_ADDR          	(NFC_REG_BASE + 0xE06)
+#define NFC_FLASH_CMD           	(NFC_REG_BASE + 0xE08)
+#define NFC_CONFIG              	(NFC_REG_BASE + 0xE0A)
+#define NFC_ECC_STATUS_RESULT		(NFC_REG_BASE + 0xE0C)
+#define NFC_SPAS			(NFC_REG_BASE + 0xE10)
+#define NFC_WRPROT              	(NFC_REG_BASE + 0xE12)
+#define NFC_UNLOCKSTART_BLKADDR  	(NFC_REG_BASE + 0xE20)
+#define NFC_UNLOCKEND_BLKADDR    	(NFC_REG_BASE + 0xE22)
+#define NFC_CONFIG1              	(NFC_REG_BASE + 0xE1A)
+#define NFC_CONFIG2              	(NFC_REG_BASE + 0xE1C)
+
+/*!
+ * Addresses for NFC RAM BUFFER Main area 0
+ */
+#define MAIN_AREA0      		(u16 *)(NFC_BASE_ADDR + 0x000)
+#define MAIN_AREA1      		(u16 *)(NFC_BASE_ADDR + 0x200)
+
+/*!
+ * Addresses for NFC SPARE BUFFER Spare area 0
+ */
+#define SPARE_AREA0     		(u16 *)(NFC_BASE_ADDR + 0x1000)
+#define SPARE_LEN			64
+#define SPARE_COUNT			8
+#define SPARE_SIZE      		(SPARE_LEN * SPARE_COUNT)
+
+
+#define SPAS_SHIFT	(0)
+#define SPAS_MASK	(0xFF00)
+#define IS_4BIT_ECC	\
+	((raw_read(REG_NFC_ECC_MODE) & NFC_ECC_MODE_4) >> 0)
+
+#define NFC_SET_SPAS(v)			\
+	raw_write(((raw_read(REG_NFC_SPAS) & SPAS_MASK) | \
+	((v<<SPAS_SHIFT))), \
+	REG_NFC_SPAS)
+
+#define NFC_SET_ECC_MODE(v) \
+do { \
+	if ((v) == NFC_SPAS_218)  { \
+		raw_write((raw_read(REG_NFC_ECC_MODE) & \
+		NFC_ECC_MODE_8), \
+		REG_NFC_ECC_MODE); \
+	} else { \
+		raw_write((raw_read(REG_NFC_ECC_MODE) | \
+		NFC_ECC_MODE_4), \
+		REG_NFC_ECC_MODE); \
+	} \
+} while (0)
+
+#define GET_ECC_STATUS() \
+	__raw_readl(REG_NFC_ECC_STATUS_RESULT);
+
+#define NFC_SET_NFMS(v)	\
+do { \
+	(NFMS |= (v)); \
+	if (((v) & (1 << NFMS_NF_PG_SZ))) { \
+		if (IS_2K_PAGE_NAND) { \
+			NFC_SET_SPAS(NFC_SPAS_64); \
+		} else if (IS_4K_PAGE_NAND) { \
+			NFC_SET_SPAS(NFC_SPAS_128); \
+		} else { \
+			NFC_SET_SPAS(NFC_SPAS_16); \
+		} \
+		NFC_SET_ECC_MODE(NFC_SPAS_128); \
+	} \
+} while (0)
+
+
+#define WRITE_NFC_IP_REG(val, reg) \
+	raw_write((raw_read(REG_NFC_OPS_STAT) & ~NFC_OPS_STAT), \
+	REG_NFC_OPS_STAT)
+
+#define GET_NFC_ECC_STATUS() \
+	raw_read(REG_NFC_ECC_STATUS_RESULT);
+
+/*!
+ * Set INT to 0, Set 1 to specific operation bit, rest to 0 in LAUNCH_NFC Register for
+ * Specific operation
+ */
+#define NFC_CMD            		0x1
+#define NFC_ADDR           		0x2
+#define NFC_INPUT          		0x4
+#define NFC_OUTPUT         		0x8
+#define NFC_ID             		0x10
+#define NFC_STATUS         		0x20
+
+/* Bit Definitions */
+#define NFC_OPS_STAT			(1 << 15)
+#define NFC_SP_EN           		(1 << 2)
+#define NFC_ECC_EN          		(1 << 3)
+#define NFC_INT_MSK         		(1 << 4)
+#define NFC_BIG             		(1 << 5)
+#define NFC_RST             		(1 << 6)
+#define NFC_CE              		(1 << 7)
+#define NFC_ONE_CYCLE       		(1 << 8)
+#define NFC_BLS_LOCKED			0
+#define NFC_BLS_LOCKED_DEFAULT		1
+#define NFC_BLS_UNLCOKED		2
+#define NFC_WPC_LOCK_TIGHT		1
+#define NFC_WPC_LOCK			(1 << 1)
+#define NFC_WPC_UNLOCK			(1 << 2)
+#define NFC_FLASH_ADDR_SHIFT 		0
+#define NFC_UNLOCK_END_ADDR_SHIFT	0
+
+#define NFC_ECC_MODE_4    		 (1<<0)
+#define NFC_ECC_MODE_8			 (~(1<<0))
+#define NFC_SPAS_16			 8
+#define NFC_SPAS_64			 32
+#define NFC_SPAS_128			 64
+#define NFC_SPAS_218			 109
+
+/* NFC Register Mapping */
+#define REG_NFC_OPS_STAT		NFC_CONFIG2
+#define REG_NFC_INTRRUPT		NFC_CONFIG1
+#define REG_NFC_FLASH_ADDR		NFC_FLASH_ADDR
+#define REG_NFC_FLASH_CMD		NFC_FLASH_CMD
+#define REG_NFC_OPS			NFC_CONFIG2
+#define REG_NFC_SET_RBA			NFC_BUF_ADDR
+#define REG_NFC_ECC_EN			NFC_CONFIG1
+#define REG_NFC_ECC_STATUS_RESULT  	NFC_ECC_STATUS_RESULT
+#define REG_NFC_CE			NFC_CONFIG1
+#define REG_NFC_SP_EN			NFC_CONFIG1
+#define REG_NFC_BLS			NFC_CONFIG
+#define REG_NFC_WPC			NFC_WRPROT
+#define REG_START_BLKADDR      		NFC_UNLOCKSTART_BLKADDR
+#define REG_END_BLKADDR        		NFC_UNLOCKEND_BLKADDR
+#define REG_NFC_RST			NFC_CONFIG1
+#define REG_NFC_ECC_MODE 		NFC_CONFIG1
+#define REG_NFC_SPAS 			NFC_SPAS
+
+
+/* NFC V1/V2 Specific MACRO functions definitions */
+
+#define raw_write(v, a)                 __raw_writew(v, a)
+#define raw_read(a)                     __raw_readw(a)
+
+#define NFC_SET_BLS(val)  		val
+
+#define UNLOCK_ADDR(start_addr, end_addr) \
+{ \
+	raw_write(start_addr, REG_START_BLKADDR); \
+	raw_write(end_addr, REG_END_BLKADDR); \
+}
+
+#define NFC_SET_NFC_ACTIVE_CS(val)
+#define NFC_SET_WPC(val)	val
+
+/* NULL Definitions */
+#define ACK_OPS
+#define NFC_SET_RBA(val) raw_write(val, REG_NFC_SET_RBA);
+
+#define READ_PAGE()	send_read_page(0)
+#define PROG_PAGE() 	send_prog_page(0)
+#define CHECK_NFC_RB            1
+
+#endif				/* __MXC_NAND_H__ */
-- 
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