/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Handles the M - Systems DiskOnChip G3 chip
*
* Copyright ( C ) 2011 Robert Jarzmik
*/
#ifndef _MTD_DOCG3_H
#define _MTD_DOCG3_H
#include <linux/mtd/mtd.h>
/*
* Flash memory areas :
* - 0 x0000 . . 0 x07ff : IPL
* - 0 x0800 . . 0 x0fff : Data area
* - 0 x1000 . . 0 x17ff : Registers
* - 0 x1800 . . 0 x1fff : Unknown
*/
#define DOC_IOSPACE_IPL 0 x0000
#define DOC_IOSPACE_DATA 0 x0800
#define DOC_IOSPACE_SIZE 0 x2000
/*
* 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 0 x3f
#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 0 x4443
#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 0 x200
#define DOC_ERASE_MARK 0 xaa
#define DOC_MAX_NBFLOORS 4
/*
* Flash registers
*/
#define DOC_CHIPID 0 x1000
#define DOC_TEST 0 x1004
#define DOC_BUSLOCK 0 x1006
#define DOC_ENDIANCONTROL 0 x1008
#define DOC_DEVICESELECT 0 x100a
#define DOC_ASICMODE 0 x100c
#define DOC_CONFIGURATION 0 x100e
#define DOC_INTERRUPTCONTROL 0 x1010
#define DOC_READADDRESS 0 x101a
#define DOC_DATAEND 0 x101e
#define DOC_INTERRUPTSTATUS 0 x1020
#define DOC_FLASHSEQUENCE 0 x1032
#define DOC_FLASHCOMMAND 0 x1034
#define DOC_FLASHADDRESS 0 x1036
#define DOC_FLASHCONTROL 0 x1038
#define DOC_NOP 0 x103e
#define DOC_ECCCONF0 0 x1040
#define DOC_ECCCONF1 0 x1042
#define DOC_ECCPRESET 0 x1044
#define DOC_HAMMINGPARITY 0 x1046
#define DOC_BCH_HW_ECC(idx) (0 x1048 + idx)
#define DOC_PROTECTION 0 x1056
#define DOC_DPS0_KEY 0 x105c
#define DOC_DPS1_KEY 0 x105e
#define DOC_DPS0_ADDRLOW 0 x1060
#define DOC_DPS0_ADDRHIGH 0 x1062
#define DOC_DPS1_ADDRLOW 0 x1064
#define DOC_DPS1_ADDRHIGH 0 x1066
#define DOC_DPS0_STATUS 0 x106c
#define DOC_DPS1_STATUS 0 x106e
#define DOC_ASICMODECONFIRM 0 x1072
#define DOC_CHIPID_INV 0 x1074
#define DOC_POWERMODE 0 x107c
/*
* Flash sequences
* A sequence is preset before one or more commands are input to the chip .
*/
#define DOC_SEQ_RESET 0 x00
#define DOC_SEQ_PAGE_SIZE_532 0 x03
#define DOC_SEQ_SET_FASTMODE 0 x05
#define DOC_SEQ_SET_RELIABLEMODE 0 x09
#define DOC_SEQ_READ 0 x12
#define DOC_SEQ_SET_PLANE1 0 x0e
#define DOC_SEQ_SET_PLANE2 0 x10
#define DOC_SEQ_PAGE_SETUP 0 x1d
#define DOC_SEQ_ERASE 0 x27
#define DOC_SEQ_PLANES_STATUS 0 x31
/*
* Flash commands
*/
#define DOC_CMD_READ_PLANE1 0 x00
#define DOC_CMD_SET_ADDR_READ 0 x05
#define DOC_CMD_READ_ALL_PLANES 0 x30
#define DOC_CMD_READ_PLANE2 0 x50
#define DOC_CMD_READ_FLASH 0 xe0
#define DOC_CMD_PAGE_SIZE_532 0 x3c
#define DOC_CMD_PROG_BLOCK_ADDR 0 x60
#define DOC_CMD_PROG_CYCLE1 0 x80
#define DOC_CMD_PROG_CYCLE2 0 x10
#define DOC_CMD_PROG_CYCLE3 0 x11
#define DOC_CMD_ERASECYCLE2 0 xd0
#define DOC_CMD_READ_STATUS 0 x70
#define DOC_CMD_PLANES_STATUS 0 x71
#define DOC_CMD_RELIABLE_MODE 0 x22
#define DOC_CMD_FAST_MODE 0 xa2
#define DOC_CMD_RESET 0 xff
/*
* Flash register : DOC_FLASHCONTROL
*/
#define DOC_CTRL_VIOLATION 0 x20
#define DOC_CTRL_CE 0 x10
#define DOC_CTRL_UNKNOWN_BITS 0 x08
#define DOC_CTRL_PROTECTION_ERROR 0 x04
#define DOC_CTRL_SEQUENCE_ERROR 0 x02
#define DOC_CTRL_FLASHREADY 0 x01
/*
* Flash register : DOC_ASICMODE
*/
#define DOC_ASICMODE_RESET 0 x00
#define DOC_ASICMODE_NORMAL 0 x01
#define DOC_ASICMODE_POWERDOWN 0 x02
#define DOC_ASICMODE_MDWREN 0 x04
#define DOC_ASICMODE_BDETCT_RESET 0 x08
#define DOC_ASICMODE_RSTIN_RESET 0 x10
#define DOC_ASICMODE_RAM_WE 0 x20
/*
* Flash register : DOC_ECCCONF0
*/
#define DOC_ECCCONF0_WRITE_MODE 0 x0000
#define DOC_ECCCONF0_READ_MODE 0 x8000
#define DOC_ECCCONF0_AUTO_ECC_ENABLE 0 x4000
#define DOC_ECCCONF0_HAMMING_ENABLE 0 x1000
#define DOC_ECCCONF0_BCH_ENABLE 0 x0800
#define DOC_ECCCONF0_DATA_BYTES_MASK 0 x07ff
/*
* Flash register : DOC_ECCCONF1
*/
#define DOC_ECCCONF1_BCH_SYNDROM_ERR 0 x80
#define DOC_ECCCONF1_UNKOWN1 0 x40
#define DOC_ECCCONF1_PAGE_IS_WRITTEN 0 x20
#define DOC_ECCCONF1_UNKOWN3 0 x10
#define DOC_ECCCONF1_HAMMING_BITS_MASK 0 x0f
/*
* Flash register : DOC_PROTECTION
*/
#define DOC_PROTECT_FOUNDRY_OTP_LOCK 0 x01
#define DOC_PROTECT_CUSTOMER_OTP_LOCK 0 x02
#define DOC_PROTECT_LOCK_INPUT 0 x04
#define DOC_PROTECT_STICKY_LOCK 0 x08
#define DOC_PROTECT_PROTECTION_ENABLED 0 x10
#define DOC_PROTECT_IPL_DOWNLOAD_LOCK 0 x20
#define DOC_PROTECT_PROTECTION_ERROR 0 x80
/*
* Flash register : DOC_DPS0_STATUS and DOC_DPS1_STATUS
*/
#define DOC_DPS_OTP_PROTECTED 0 x01
#define DOC_DPS_READ_PROTECTED 0 x02
#define DOC_DPS_WRITE_PROTECTED 0 x04
#define DOC_DPS_HW_LOCK_ENABLED 0 x08
#define DOC_DPS_KEY_OK 0 x80
/*
* Flash register : DOC_CONFIGURATION
*/
#define DOC_CONF_IF_CFG 0 x80
#define DOC_CONF_MAX_ID_MASK 0 x30
#define DOC_CONF_VCCQ_3V 0 x01
/*
* Flash register : DOC_READADDRESS
*/
#define DOC_READADDR_INC 0 x8000
#define DOC_READADDR_ONE_BYTE 0 x4000
#define DOC_READADDR_ADDR_MASK 0 x1fff
/*
* Flash register : DOC_POWERMODE
*/
#define DOC_POWERDOWN_READY 0 x80
/*
* Status of erase and write operation
*/
#define DOC_PLANES_STATUS_FAIL 0 x01
#define DOC_PLANES_STATUS_PLANE0_KO 0 x02
#define DOC_PLANES_STATUS_PLANE1_KO 0 x04
/*
* 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 16 bits , else reads are on 8 bits
* @ 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
*/
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];
};
#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)
#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>
Messung V0.5 in Prozent C=94 H=100 G=96
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(vorverarbeitet am 2026-09-28)
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