drivers/mtd/devices/docg3.h - kernel/bruno - Git at Google

 /*
  * Handles the M-Systems DiskOnChip G3 chip
  *
  * Copyright (C) 2011 Robert Jarzmik
  *
  * 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
  *
  */

 #ifndef _MTD_DOCG3_H
 #define _MTD_DOCG3_H

 #include <linux/mtd/mtd.h>

 /*
  * Flash memory areas :
  *   - 0x0000 .. 0x07ff : IPL
  *   - 0x0800 .. 0x0fff : Data area
  *   - 0x1000 .. 0x17ff : Registers
  *   - 0x1800 .. 0x1fff : Unknown
  */
 #define DOC_IOSPACE_IPL			0x0000
 #define DOC_IOSPACE_DATA		0x0800
 #define DOC_IOSPACE_SIZE		0x2000

 /*
  * DOC G3 layout and adressing scheme
  *   A page address for the block "b", plane "P" and page "p":
  *   address = [bbbb bPpp pppp]
  */

 #define DOC_ADDR_PAGE_MASK		0x3f
 #define DOC_ADDR_BLOCK_SHIFT		6
 #define DOC_LAYOUT_NBPLANES		2
 #define DOC_LAYOUT_PAGES_PER_BLOCK	64
 #define DOC_LAYOUT_PAGE_SIZE		512
 #define DOC_LAYOUT_OOB_SIZE		16
 #define DOC_LAYOUT_WEAR_SIZE		8
 #define DOC_LAYOUT_PAGE_OOB_SIZE				\
 	(DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_SIZE)
 #define DOC_LAYOUT_WEAR_OFFSET		(DOC_LAYOUT_PAGE_OOB_SIZE * 2)
 #define DOC_LAYOUT_BLOCK_SIZE					\
 	(DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_PAGE_SIZE)

 /*
  * ECC related constants
  */
 #define DOC_ECC_BCH_M			14
 #define DOC_ECC_BCH_T			4
 #define DOC_ECC_BCH_PRIMPOLY		0x4443
 #define DOC_ECC_BCH_SIZE		7
 #define DOC_ECC_BCH_COVERED_BYTES				\
 	(DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_PAGEINFO_SZ +	\
 	 DOC_LAYOUT_OOB_HAMMING_SZ)
 #define DOC_ECC_BCH_TOTAL_BYTES					\
 	(DOC_ECC_BCH_COVERED_BYTES + DOC_LAYOUT_OOB_BCH_SZ)

 /*
  * Blocks distribution
  */
 #define DOC_LAYOUT_BLOCK_BBT		0
 #define DOC_LAYOUT_BLOCK_OTP		0
 #define DOC_LAYOUT_BLOCK_FIRST_DATA	6

 #define DOC_LAYOUT_PAGE_BBT		4

 /*
  * Extra page OOB (16 bytes wide) layout
  */
 #define DOC_LAYOUT_OOB_PAGEINFO_OFS	0
 #define DOC_LAYOUT_OOB_HAMMING_OFS	7
 #define DOC_LAYOUT_OOB_BCH_OFS		8
 #define DOC_LAYOUT_OOB_UNUSED_OFS	15
 #define DOC_LAYOUT_OOB_PAGEINFO_SZ	7
 #define DOC_LAYOUT_OOB_HAMMING_SZ	1
 #define DOC_LAYOUT_OOB_BCH_SZ		7
 #define DOC_LAYOUT_OOB_UNUSED_SZ	1


 #define DOC_CHIPID_G3			0x200
 #define DOC_ERASE_MARK			0xaa
 #define DOC_MAX_NBFLOORS		4
 /*
  * Flash registers
  */
 #define DOC_CHIPID			0x1000
 #define DOC_TEST			0x1004
 #define DOC_BUSLOCK			0x1006
 #define DOC_ENDIANCONTROL		0x1008
 #define DOC_DEVICESELECT		0x100a
 #define DOC_ASICMODE			0x100c
 #define DOC_CONFIGURATION		0x100e
 #define DOC_INTERRUPTCONTROL		0x1010
 #define DOC_READADDRESS			0x101a
 #define DOC_DATAEND			0x101e
 #define DOC_INTERRUPTSTATUS		0x1020

 #define DOC_FLASHSEQUENCE		0x1032
 #define DOC_FLASHCOMMAND		0x1034
 #define DOC_FLASHADDRESS		0x1036
 #define DOC_FLASHCONTROL		0x1038
 #define DOC_NOP				0x103e

 #define DOC_ECCCONF0			0x1040
 #define DOC_ECCCONF1			0x1042
 #define DOC_ECCPRESET			0x1044
 #define DOC_HAMMINGPARITY		0x1046
 #define DOC_BCH_HW_ECC(idx)		(0x1048 + idx)

 #define DOC_PROTECTION			0x1056
 #define DOC_DPS0_KEY			0x105c
 #define DOC_DPS1_KEY			0x105e
 #define DOC_DPS0_ADDRLOW		0x1060
 #define DOC_DPS0_ADDRHIGH		0x1062
 #define DOC_DPS1_ADDRLOW		0x1064
 #define DOC_DPS1_ADDRHIGH		0x1066
 #define DOC_DPS0_STATUS			0x106c
 #define DOC_DPS1_STATUS			0x106e

 #define DOC_ASICMODECONFIRM		0x1072
 #define DOC_CHIPID_INV			0x1074
 #define DOC_POWERMODE			0x107c

 /*
  * Flash sequences
  * A sequence is preset before one or more commands are input to the chip.
  */
 #define DOC_SEQ_RESET			0x00
 #define DOC_SEQ_PAGE_SIZE_532		0x03
 #define DOC_SEQ_SET_FASTMODE		0x05
 #define DOC_SEQ_SET_RELIABLEMODE	0x09
 #define DOC_SEQ_READ			0x12
 #define DOC_SEQ_SET_PLANE1		0x0e
 #define DOC_SEQ_SET_PLANE2		0x10
 #define DOC_SEQ_PAGE_SETUP		0x1d
 #define DOC_SEQ_ERASE			0x27
 #define DOC_SEQ_PLANES_STATUS		0x31

 /*
  * Flash commands
  */
 #define DOC_CMD_READ_PLANE1		0x00
 #define DOC_CMD_SET_ADDR_READ		0x05
 #define DOC_CMD_READ_ALL_PLANES		0x30
 #define DOC_CMD_READ_PLANE2		0x50
 #define DOC_CMD_READ_FLASH		0xe0
 #define DOC_CMD_PAGE_SIZE_532		0x3c

 #define DOC_CMD_PROG_BLOCK_ADDR		0x60
 #define DOC_CMD_PROG_CYCLE1		0x80
 #define DOC_CMD_PROG_CYCLE2		0x10
 #define DOC_CMD_PROG_CYCLE3		0x11
 #define DOC_CMD_ERASECYCLE2		0xd0
 #define DOC_CMD_READ_STATUS		0x70
 #define DOC_CMD_PLANES_STATUS		0x71

 #define DOC_CMD_RELIABLE_MODE		0x22
 #define DOC_CMD_FAST_MODE		0xa2

 #define DOC_CMD_RESET			0xff

 /*
  * Flash register : DOC_FLASHCONTROL
  */
 #define DOC_CTRL_VIOLATION		0x20
 #define DOC_CTRL_CE			0x10
 #define DOC_CTRL_UNKNOWN_BITS		0x08
 #define DOC_CTRL_PROTECTION_ERROR	0x04
 #define DOC_CTRL_SEQUENCE_ERROR		0x02
 #define DOC_CTRL_FLASHREADY		0x01

 /*
  * Flash register : DOC_ASICMODE
  */
 #define DOC_ASICMODE_RESET		0x00
 #define DOC_ASICMODE_NORMAL		0x01
 #define DOC_ASICMODE_POWERDOWN		0x02
 #define DOC_ASICMODE_MDWREN		0x04
 #define DOC_ASICMODE_BDETCT_RESET	0x08
 #define DOC_ASICMODE_RSTIN_RESET	0x10
 #define DOC_ASICMODE_RAM_WE		0x20

 /*
  * Flash register : DOC_ECCCONF0
  */
 #define DOC_ECCCONF0_WRITE_MODE		0x0000
 #define DOC_ECCCONF0_READ_MODE		0x8000
 #define DOC_ECCCONF0_AUTO_ECC_ENABLE	0x4000
 #define DOC_ECCCONF0_HAMMING_ENABLE	0x1000
 #define DOC_ECCCONF0_BCH_ENABLE		0x0800
 #define DOC_ECCCONF0_DATA_BYTES_MASK	0x07ff

 /*
  * Flash register : DOC_ECCCONF1
  */
 #define DOC_ECCCONF1_BCH_SYNDROM_ERR	0x80
 #define DOC_ECCCONF1_UNKOWN1		0x40
 #define DOC_ECCCONF1_PAGE_IS_WRITTEN	0x20
 #define DOC_ECCCONF1_UNKOWN3		0x10
 #define DOC_ECCCONF1_HAMMING_BITS_MASK	0x0f

 /*
  * Flash register : DOC_PROTECTION
  */
 #define DOC_PROTECT_FOUNDRY_OTP_LOCK	0x01
 #define DOC_PROTECT_CUSTOMER_OTP_LOCK	0x02
 #define DOC_PROTECT_LOCK_INPUT		0x04
 #define DOC_PROTECT_STICKY_LOCK		0x08
 #define DOC_PROTECT_PROTECTION_ENABLED	0x10
 #define DOC_PROTECT_IPL_DOWNLOAD_LOCK	0x20
 #define DOC_PROTECT_PROTECTION_ERROR	0x80

 /*
  * Flash register : DOC_DPS0_STATUS and DOC_DPS1_STATUS
  */
 #define DOC_DPS_OTP_PROTECTED		0x01
 #define DOC_DPS_READ_PROTECTED		0x02
 #define DOC_DPS_WRITE_PROTECTED		0x04
 #define DOC_DPS_HW_LOCK_ENABLED		0x08
 #define DOC_DPS_KEY_OK			0x80

 /*
  * Flash register : DOC_CONFIGURATION
  */
 #define DOC_CONF_IF_CFG			0x80
 #define DOC_CONF_MAX_ID_MASK		0x30
 #define DOC_CONF_VCCQ_3V		0x01

 /*
  * Flash register : DOC_READADDRESS
  */
 #define DOC_READADDR_INC		0x8000
 #define DOC_READADDR_ONE_BYTE		0x4000
 #define DOC_READADDR_ADDR_MASK		0x1fff

 /*
  * Flash register : DOC_POWERMODE
  */
 #define DOC_POWERDOWN_READY		0x80

 /*
  * Status of erase and write operation
  */
 #define DOC_PLANES_STATUS_FAIL		0x01
 #define DOC_PLANES_STATUS_PLANE0_KO	0x02
 #define DOC_PLANES_STATUS_PLANE1_KO	0x04

 /*
  * DPS key management
  *
  * Each floor of docg3 has 2 protection areas: DPS0 and DPS1. These areas span
  * across block boundaries, and define whether these blocks can be read or
  * written.
  * The definition is dynamically stored in page 0 of blocks (2,3) for DPS0, and
  * page 0 of blocks (4,5) for DPS1.
  */
 #define DOC_LAYOUT_DPS_KEY_LENGTH	8

 /**
  * struct docg3_cascade - Cascade of 1 to 4 docg3 chips
  * @floors: floors (ie. one physical docg3 chip is one floor)
  * @base: IO space to access all chips in the cascade
  * @bch: the BCH correcting control structure
  * @lock: lock to protect docg3 IO space from concurrent accesses
  */
 struct docg3_cascade {
 	struct mtd_info *floors[DOC_MAX_NBFLOORS];
 	void __iomem *base;
 	struct bch_control *bch;
 	struct mutex lock;
 };

 /**
  * struct docg3 - DiskOnChip driver private data
  * @dev: the device currently under control
  * @cascade: the cascade this device belongs to
  * @device_id: number of the cascaded DoCG3 device (0, 1, 2 or 3)
  * @if_cfg: if true, reads are on 16bits, else reads are on 8bits

  * @reliable: if 0, docg3 in normal mode, if 1 docg3 in fast mode, if 2 in
  *            reliable mode
  *            Fast mode implies more errors than normal mode.
  *            Reliable mode implies that page 2*n and 2*n+1 are clones.
  * @bbt: bad block table cache
  * @oob_write_ofs: offset of the MTD where this OOB should belong (ie. in next
  *                 page_write)
  * @oob_autoecc: if 1, use only bytes 0-7, 15, and fill the others with HW ECC
  *               if 0, use all the 16 bytes.
  * @oob_write_buf: prepared OOB for next page_write
  * @debugfs_root: debugfs root node
  */
 struct docg3 {
 	struct device *dev;
 	struct docg3_cascade *cascade;
 	unsigned int device_id:4;
 	unsigned int if_cfg:1;
 	unsigned int reliable:2;
 	int max_block;
 	u8 *bbt;
 	loff_t oob_write_ofs;
 	int oob_autoecc;
 	u8 oob_write_buf[DOC_LAYOUT_OOB_SIZE];
 	struct dentry *debugfs_root;
 };

 #define doc_err(fmt, arg...) dev_err(docg3->dev, (fmt), ## arg)
 #define doc_info(fmt, arg...) dev_info(docg3->dev, (fmt), ## arg)
 #define doc_dbg(fmt, arg...) dev_dbg(docg3->dev, (fmt), ## arg)
 #define doc_vdbg(fmt, arg...) dev_vdbg(docg3->dev, (fmt), ## arg)

 #define DEBUGFS_RO_ATTR(name, show_fct) \
 	static int name##_open(struct inode *inode, struct file *file) \
 	{ return single_open(file, show_fct, inode->i_private); }      \
 	static const struct file_operations name##_fops = { \
 		.owner = THIS_MODULE, \
 		.open = name##_open, \
 		.llseek = seq_lseek, \
 		.read = seq_read, \
 		.release = single_release \
 	};
 #endif

 /*
  * Trace events part
  */
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM docg3

 #if !defined(_MTD_DOCG3_TRACE) || defined(TRACE_HEADER_MULTI_READ)
 #define _MTD_DOCG3_TRACE

 #include <linux/tracepoint.h>

 TRACE_EVENT(docg3_io,
 	    TP_PROTO(int op, int width, u16 reg, int val),
 	    TP_ARGS(op, width, reg, val),
 	    TP_STRUCT__entry(
 		    __field(int, op)
 		    __field(unsigned char, width)
 		    __field(u16, reg)
 		    __field(int, val)),
 	    TP_fast_assign(
 		    __entry->op = op;
 		    __entry->width = width;
 		    __entry->reg = reg;
 		    __entry->val = val;),
 	    TP_printk("docg3: %s%02d reg=%04x, val=%04x",
 		      __entry->op ? "write" : "read", __entry->width,
 		      __entry->reg, __entry->val)
 	);
 #endif

 /* This part must be outside protection */
 #undef TRACE_INCLUDE_PATH
 #undef TRACE_INCLUDE_FILE
 #define TRACE_INCLUDE_PATH .
 #define TRACE_INCLUDE_FILE docg3
 #include <trace/define_trace.h>
	/*
	* Handles the M-Systems DiskOnChip G3 chip
	*
	* Copyright (C) 2011 Robert Jarzmik
	*
	* 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
	*
	*/

	#ifndef _MTD_DOCG3_H
	#define _MTD_DOCG3_H

	#include <linux/mtd/mtd.h>

	/*
	* Flash memory areas :
	* - 0x0000 .. 0x07ff : IPL
	* - 0x0800 .. 0x0fff : Data area
	* - 0x1000 .. 0x17ff : Registers
	* - 0x1800 .. 0x1fff : Unknown
	*/
	#define DOC_IOSPACE_IPL 0x0000
	#define DOC_IOSPACE_DATA 0x0800
	#define DOC_IOSPACE_SIZE 0x2000

	/*
	* DOC G3 layout and adressing scheme
	* A page address for the block "b", plane "P" and page "p":
	* address = [bbbb bPpp pppp]
	*/

	#define DOC_ADDR_PAGE_MASK 0x3f
	#define DOC_ADDR_BLOCK_SHIFT 6
	#define DOC_LAYOUT_NBPLANES 2
	#define DOC_LAYOUT_PAGES_PER_BLOCK 64
	#define DOC_LAYOUT_PAGE_SIZE 512
	#define DOC_LAYOUT_OOB_SIZE 16
	#define DOC_LAYOUT_WEAR_SIZE 8
	#define DOC_LAYOUT_PAGE_OOB_SIZE \
	(DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_SIZE)
	#define DOC_LAYOUT_WEAR_OFFSET (DOC_LAYOUT_PAGE_OOB_SIZE * 2)
	#define DOC_LAYOUT_BLOCK_SIZE \
	(DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_PAGE_SIZE)

	/*
	* ECC related constants
	*/
	#define DOC_ECC_BCH_M 14
	#define DOC_ECC_BCH_T 4
	#define DOC_ECC_BCH_PRIMPOLY 0x4443
	#define DOC_ECC_BCH_SIZE 7
	#define DOC_ECC_BCH_COVERED_BYTES \
	(DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_PAGEINFO_SZ + \
	DOC_LAYOUT_OOB_HAMMING_SZ)
	#define DOC_ECC_BCH_TOTAL_BYTES \
	(DOC_ECC_BCH_COVERED_BYTES + DOC_LAYOUT_OOB_BCH_SZ)

	/*
	* Blocks distribution
	*/
	#define DOC_LAYOUT_BLOCK_BBT 0
	#define DOC_LAYOUT_BLOCK_OTP 0
	#define DOC_LAYOUT_BLOCK_FIRST_DATA 6

	#define DOC_LAYOUT_PAGE_BBT 4

	/*
	* Extra page OOB (16 bytes wide) layout
	*/
	#define DOC_LAYOUT_OOB_PAGEINFO_OFS 0
	#define DOC_LAYOUT_OOB_HAMMING_OFS 7
	#define DOC_LAYOUT_OOB_BCH_OFS 8
	#define DOC_LAYOUT_OOB_UNUSED_OFS 15
	#define DOC_LAYOUT_OOB_PAGEINFO_SZ 7
	#define DOC_LAYOUT_OOB_HAMMING_SZ 1
	#define DOC_LAYOUT_OOB_BCH_SZ 7
	#define DOC_LAYOUT_OOB_UNUSED_SZ 1


	#define DOC_CHIPID_G3 0x200
	#define DOC_ERASE_MARK 0xaa
	#define DOC_MAX_NBFLOORS 4
	/*
	* Flash registers
	*/
	#define DOC_CHIPID 0x1000
	#define DOC_TEST 0x1004
	#define DOC_BUSLOCK 0x1006
	#define DOC_ENDIANCONTROL 0x1008
	#define DOC_DEVICESELECT 0x100a
	#define DOC_ASICMODE 0x100c
	#define DOC_CONFIGURATION 0x100e
	#define DOC_INTERRUPTCONTROL 0x1010
	#define DOC_READADDRESS 0x101a
	#define DOC_DATAEND 0x101e
	#define DOC_INTERRUPTSTATUS 0x1020

	#define DOC_FLASHSEQUENCE 0x1032
	#define DOC_FLASHCOMMAND 0x1034
	#define DOC_FLASHADDRESS 0x1036
	#define DOC_FLASHCONTROL 0x1038
	#define DOC_NOP 0x103e

	#define DOC_ECCCONF0 0x1040
	#define DOC_ECCCONF1 0x1042
	#define DOC_ECCPRESET 0x1044
	#define DOC_HAMMINGPARITY 0x1046
	#define DOC_BCH_HW_ECC(idx) (0x1048 + idx)

	#define DOC_PROTECTION 0x1056
	#define DOC_DPS0_KEY 0x105c
	#define DOC_DPS1_KEY 0x105e
	#define DOC_DPS0_ADDRLOW 0x1060
	#define DOC_DPS0_ADDRHIGH 0x1062
	#define DOC_DPS1_ADDRLOW 0x1064
	#define DOC_DPS1_ADDRHIGH 0x1066
	#define DOC_DPS0_STATUS 0x106c
	#define DOC_DPS1_STATUS 0x106e

	#define DOC_ASICMODECONFIRM 0x1072
	#define DOC_CHIPID_INV 0x1074
	#define DOC_POWERMODE 0x107c

	/*
	* Flash sequences
	* A sequence is preset before one or more commands are input to the chip.
	*/
	#define DOC_SEQ_RESET 0x00
	#define DOC_SEQ_PAGE_SIZE_532 0x03
	#define DOC_SEQ_SET_FASTMODE 0x05
	#define DOC_SEQ_SET_RELIABLEMODE 0x09
	#define DOC_SEQ_READ 0x12
	#define DOC_SEQ_SET_PLANE1 0x0e
	#define DOC_SEQ_SET_PLANE2 0x10
	#define DOC_SEQ_PAGE_SETUP 0x1d
	#define DOC_SEQ_ERASE 0x27
	#define DOC_SEQ_PLANES_STATUS 0x31

	/*
	* Flash commands
	*/
	#define DOC_CMD_READ_PLANE1 0x00
	#define DOC_CMD_SET_ADDR_READ 0x05
	#define DOC_CMD_READ_ALL_PLANES 0x30
	#define DOC_CMD_READ_PLANE2 0x50
	#define DOC_CMD_READ_FLASH 0xe0
	#define DOC_CMD_PAGE_SIZE_532 0x3c

	#define DOC_CMD_PROG_BLOCK_ADDR 0x60
	#define DOC_CMD_PROG_CYCLE1 0x80
	#define DOC_CMD_PROG_CYCLE2 0x10
	#define DOC_CMD_PROG_CYCLE3 0x11
	#define DOC_CMD_ERASECYCLE2 0xd0
	#define DOC_CMD_READ_STATUS 0x70
	#define DOC_CMD_PLANES_STATUS 0x71

	#define DOC_CMD_RELIABLE_MODE 0x22
	#define DOC_CMD_FAST_MODE 0xa2

	#define DOC_CMD_RESET 0xff

	/*
	* Flash register : DOC_FLASHCONTROL
	*/
	#define DOC_CTRL_VIOLATION 0x20
	#define DOC_CTRL_CE 0x10
	#define DOC_CTRL_UNKNOWN_BITS 0x08
	#define DOC_CTRL_PROTECTION_ERROR 0x04
	#define DOC_CTRL_SEQUENCE_ERROR 0x02
	#define DOC_CTRL_FLASHREADY 0x01

	/*
	* Flash register : DOC_ASICMODE
	*/
	#define DOC_ASICMODE_RESET 0x00
	#define DOC_ASICMODE_NORMAL 0x01
	#define DOC_ASICMODE_POWERDOWN 0x02
	#define DOC_ASICMODE_MDWREN 0x04
	#define DOC_ASICMODE_BDETCT_RESET 0x08
	#define DOC_ASICMODE_RSTIN_RESET 0x10
	#define DOC_ASICMODE_RAM_WE 0x20

	/*
	* Flash register : DOC_ECCCONF0
	*/
	#define DOC_ECCCONF0_WRITE_MODE 0x0000
	#define DOC_ECCCONF0_READ_MODE 0x8000
	#define DOC_ECCCONF0_AUTO_ECC_ENABLE 0x4000
	#define DOC_ECCCONF0_HAMMING_ENABLE 0x1000
	#define DOC_ECCCONF0_BCH_ENABLE 0x0800
	#define DOC_ECCCONF0_DATA_BYTES_MASK 0x07ff

	/*
	* Flash register : DOC_ECCCONF1
	*/
	#define DOC_ECCCONF1_BCH_SYNDROM_ERR 0x80
	#define DOC_ECCCONF1_UNKOWN1 0x40
	#define DOC_ECCCONF1_PAGE_IS_WRITTEN 0x20
	#define DOC_ECCCONF1_UNKOWN3 0x10
	#define DOC_ECCCONF1_HAMMING_BITS_MASK 0x0f

	/*
	* Flash register : DOC_PROTECTION
	*/
	#define DOC_PROTECT_FOUNDRY_OTP_LOCK 0x01
	#define DOC_PROTECT_CUSTOMER_OTP_LOCK 0x02
	#define DOC_PROTECT_LOCK_INPUT 0x04
	#define DOC_PROTECT_STICKY_LOCK 0x08
	#define DOC_PROTECT_PROTECTION_ENABLED 0x10
	#define DOC_PROTECT_IPL_DOWNLOAD_LOCK 0x20
	#define DOC_PROTECT_PROTECTION_ERROR 0x80

	/*
	* Flash register : DOC_DPS0_STATUS and DOC_DPS1_STATUS
	*/
	#define DOC_DPS_OTP_PROTECTED 0x01
	#define DOC_DPS_READ_PROTECTED 0x02
	#define DOC_DPS_WRITE_PROTECTED 0x04
	#define DOC_DPS_HW_LOCK_ENABLED 0x08
	#define DOC_DPS_KEY_OK 0x80

	/*
	* Flash register : DOC_CONFIGURATION
	*/
	#define DOC_CONF_IF_CFG 0x80
	#define DOC_CONF_MAX_ID_MASK 0x30
	#define DOC_CONF_VCCQ_3V 0x01

	/*
	* Flash register : DOC_READADDRESS
	*/
	#define DOC_READADDR_INC 0x8000
	#define DOC_READADDR_ONE_BYTE 0x4000
	#define DOC_READADDR_ADDR_MASK 0x1fff

	/*
	* Flash register : DOC_POWERMODE
	*/
	#define DOC_POWERDOWN_READY 0x80

	/*
	* Status of erase and write operation
	*/
	#define DOC_PLANES_STATUS_FAIL 0x01
	#define DOC_PLANES_STATUS_PLANE0_KO 0x02
	#define DOC_PLANES_STATUS_PLANE1_KO 0x04

	/*
	* DPS key management
	*
	* Each floor of docg3 has 2 protection areas: DPS0 and DPS1. These areas span
	* across block boundaries, and define whether these blocks can be read or
	* written.
	* The definition is dynamically stored in page 0 of blocks (2,3) for DPS0, and
	* page 0 of blocks (4,5) for DPS1.
	*/
	#define DOC_LAYOUT_DPS_KEY_LENGTH 8

	/**
	* struct docg3_cascade - Cascade of 1 to 4 docg3 chips
	* @floors: floors (ie. one physical docg3 chip is one floor)
	* @base: IO space to access all chips in the cascade
	* @bch: the BCH correcting control structure
	* @lock: lock to protect docg3 IO space from concurrent accesses
	*/
	struct docg3_cascade {
	struct mtd_info *floors[DOC_MAX_NBFLOORS];
	void __iomem *base;
	struct bch_control *bch;
	struct mutex lock;
	};

	/**
	* struct docg3 - DiskOnChip driver private data
	* @dev: the device currently under control
	* @cascade: the cascade this device belongs to
	* @device_id: number of the cascaded DoCG3 device (0, 1, 2 or 3)
	* @if_cfg: if true, reads are on 16bits, else reads are on 8bits

	* @reliable: if 0, docg3 in normal mode, if 1 docg3 in fast mode, if 2 in
	* reliable mode
	* Fast mode implies more errors than normal mode.
	* Reliable mode implies that page 2n and 2n+1 are clones.
	* @bbt: bad block table cache
	* @oob_write_ofs: offset of the MTD where this OOB should belong (ie. in next
	* page_write)
	* @oob_autoecc: if 1, use only bytes 0-7, 15, and fill the others with HW ECC
	* if 0, use all the 16 bytes.
	* @oob_write_buf: prepared OOB for next page_write
	* @debugfs_root: debugfs root node
	*/
	struct docg3 {
	struct device *dev;
	struct docg3_cascade *cascade;
	unsigned int device_id:4;
	unsigned int if_cfg:1;
	unsigned int reliable:2;
	int max_block;
	u8 *bbt;
	loff_t oob_write_ofs;
	int oob_autoecc;
	u8 oob_write_buf[DOC_LAYOUT_OOB_SIZE];
	struct dentry *debugfs_root;
	};

	#define doc_err(fmt, arg...) dev_err(docg3->dev, (fmt), ## arg)
	#define doc_info(fmt, arg...) dev_info(docg3->dev, (fmt), ## arg)
	#define doc_dbg(fmt, arg...) dev_dbg(docg3->dev, (fmt), ## arg)
	#define doc_vdbg(fmt, arg...) dev_vdbg(docg3->dev, (fmt), ## arg)

	#define DEBUGFS_RO_ATTR(name, show_fct) \
	static int name##_open(struct inode inode, struct file file) \
	{ return single_open(file, show_fct, inode->i_private); } \
	static const struct file_operations name##_fops = { \
	.owner = THIS_MODULE, \
	.open = name##_open, \
	.llseek = seq_lseek, \
	.read = seq_read, \
	.release = single_release \
	};
	#endif

	/*
	* Trace events part
	*/
	#undef TRACE_SYSTEM
	#define TRACE_SYSTEM docg3

	#if !defined(_MTD_DOCG3_TRACE) \|\| defined(TRACE_HEADER_MULTI_READ)
	#define _MTD_DOCG3_TRACE

	#include <linux/tracepoint.h>

	TRACE_EVENT(docg3_io,
	TP_PROTO(int op, int width, u16 reg, int val),
	TP_ARGS(op, width, reg, val),
	TP_STRUCT__entry(
	__field(int, op)
	__field(unsigned char, width)
	__field(u16, reg)
	__field(int, val)),
	TP_fast_assign(
	__entry->op = op;
	__entry->width = width;
	__entry->reg = reg;
	__entry->val = val;),
	TP_printk("docg3: %s%02d reg=%04x, val=%04x",
	__entry->op ? "write" : "read", __entry->width,
	__entry->reg, __entry->val)
	);
	#endif

	/* This part must be outside protection */
	#undef TRACE_INCLUDE_PATH
	#undef TRACE_INCLUDE_FILE
	#define TRACE_INCLUDE_PATH .
	#define TRACE_INCLUDE_FILE docg3
	#include <trace/define_trace.h>