path: root/drivers/mtd/nand/mxc_nand.c

/*
 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
 * Copyright 2008 Sascha Hauer, kernel@pengutronix.de
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/completion.h>

#include <asm/mach/flash.h>
#include <mach/mxc_nand.h>
#include <mach/hardware.h>

#define DRIVER_NAME "mxc_nand"

#define nfc_is_v21()		(cpu_is_mx25() || cpu_is_mx35())
#define nfc_is_v1()		(cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21())
#define nfc_is_v3_2()		cpu_is_mx51()
#define nfc_is_v3()		nfc_is_v3_2()

/* Addresses for NFC registers */
#define NFC_V1_V2_BUF_SIZE		(host->regs + 0x00)
#define NFC_V1_V2_BUF_ADDR		(host->regs + 0x04)
#define NFC_V1_V2_FLASH_ADDR		(host->regs + 0x06)
#define NFC_V1_V2_FLASH_CMD		(host->regs + 0x08)
#define NFC_V1_V2_CONFIG		(host->regs + 0x0a)
#define NFC_V1_V2_ECC_STATUS_RESULT	(host->regs + 0x0c)
#define NFC_V1_V2_RSLTMAIN_AREA		(host->regs + 0x0e)
#define NFC_V1_V2_RSLTSPARE_AREA	(host->regs + 0x10)
#define NFC_V1_V2_WRPROT		(host->regs + 0x12)
#define NFC_V1_UNLOCKSTART_BLKADDR	(host->regs + 0x14)
#define NFC_V1_UNLOCKEND_BLKADDR	(host->regs + 0x16)
#define NFC_V21_UNLOCKSTART_BLKADDR	(host->regs + 0x20)
#define NFC_V21_UNLOCKEND_BLKADDR	(host->regs + 0x22)
#define NFC_V1_V2_NF_WRPRST		(host->regs + 0x18)
#define NFC_V1_V2_CONFIG1		(host->regs + 0x1a)
#define NFC_V1_V2_CONFIG2		(host->regs + 0x1c)

#define NFC_V2_CONFIG1_ECC_MODE_4	(1 << 0)
#define NFC_V1_V2_CONFIG1_SP_EN		(1 << 2)
#define NFC_V1_V2_CONFIG1_ECC_EN	(1 << 3)
#define NFC_V1_V2_CONFIG1_INT_MSK	(1 << 4)
#define NFC_V1_V2_CONFIG1_BIG		(1 << 5)
#define NFC_V1_V2_CONFIG1_RST		(1 << 6)
#define NFC_V1_V2_CONFIG1_CE		(1 << 7)
#define NFC_V2_CONFIG1_ONE_CYCLE	(1 << 8)
#define NFC_V2_CONFIG1_PPB(x)		(((x) & 0x3) << 9)
#define NFC_V2_CONFIG1_FP_INT		(1 << 11)

#define NFC_V1_V2_CONFIG2_INT		(1 << 15)

/*
 * Operation modes for the NFC. Valid for v1, v2 and v3
 * type controllers.
 */
#define NFC_CMD				(1 << 0)
#define NFC_ADDR			(1 << 1)
#define NFC_INPUT			(1 << 2)
#define NFC_OUTPUT			(1 << 3)
#define NFC_ID				(1 << 4)
#define NFC_STATUS			(1 << 5)

#define NFC_V3_FLASH_CMD		(host->regs_axi + 0x00)
#define NFC_V3_FLASH_ADDR0		(host->regs_axi + 0x04)

#define NFC_V3_CONFIG1			(host->regs_axi + 0x34)
#define NFC_V3_CONFIG1_SP_EN		(1 << 0)
#define NFC_V3_CONFIG1_RBA(x)		(((x) & 0x7 ) << 4)

#define NFC_V3_ECC_STATUS_RESULT	(host->regs_axi + 0x38)

#define NFC_V3_LAUNCH			(host->regs_axi + 0x40)

#define NFC_V3_WRPROT			(host->regs_ip + 0x0)
#define NFC_V3_WRPROT_LOCK_TIGHT	(1 << 0)
#define NFC_V3_WRPROT_LOCK		(1 << 1)
#define NFC_V3_WRPROT_UNLOCK		(1 << 2)
#define NFC_V3_WRPROT_BLS_UNLOCK	(2 << 6)

#define NFC_V3_WRPROT_UNLOCK_BLK_ADD0   (host->regs_ip + 0x04)

#define NFC_V3_CONFIG2			(host->regs_ip + 0x24)
#define NFC_V3_CONFIG2_PS_512			(0 << 0)
#define NFC_V3_CONFIG2_PS_2048			(1 << 0)
#define NFC_V3_CONFIG2_PS_4096			(2 << 0)
#define NFC_V3_CONFIG2_ONE_CYCLE		(1 << 2)
#define NFC_V3_CONFIG2_ECC_EN			(1 << 3)
#define NFC_V3_CONFIG2_2CMD_PHASES		(1 << 4)
#define NFC_V3_CONFIG2_NUM_ADDR_PHASE0		(1 << 5)
#define NFC_V3_CONFIG2_ECC_MODE_8		(1 << 6)
#define NFC_V3_CONFIG2_PPB(x)			(((x) & 0x3) << 7)
#define NFC_V3_CONFIG2_NUM_ADDR_PHASE1(x)	(((x) & 0x3) << 12)
#define NFC_V3_CONFIG2_INT_MSK			(1 << 15)
#define NFC_V3_CONFIG2_ST_CMD(x)		(((x) & 0xff) << 24)
#define NFC_V3_CONFIG2_SPAS(x)			(((x) & 0xff) << 16)

#define NFC_V3_CONFIG3				(host->regs_ip + 0x28)
#define NFC_V3_CONFIG3_ADD_OP(x)		(((x) & 0x3) << 0)
#define NFC_V3_CONFIG3_FW8			(1 << 3)
#define NFC_V3_CONFIG3_SBB(x)			(((x) & 0x7) << 8)
#define NFC_V3_CONFIG3_NUM_OF_DEVICES(x)	(((x) & 0x7) << 12)
#define NFC_V3_CONFIG3_RBB_MODE			(1 << 15)
#define NFC_V3_CONFIG3_NO_SDMA			(1 << 20)

#define NFC_V3_IPC			(host->regs_ip + 0x2C)
#define NFC_V3_IPC_CREQ			(1 << 0)
#define NFC_V3_IPC_INT			(1 << 31)

#define NFC_V3_DELAY_LINE		(host->regs_ip + 0x34)

struct mxc_nand_host {
	struct mtd_info		mtd;
	struct nand_chip	nand;
	struct mtd_partition	*parts;
	struct device		*dev;

	void			*spare0;
	void			*main_area0;

	void __iomem		*base;
	void __iomem		*regs;
	void __iomem		*regs_axi;
	void __iomem		*regs_ip;
	int			status_request;
	struct clk		*clk;
	int			clk_act;
	int			irq;
	int			eccsize;

	struct completion	op_completion;