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7b0e67f604
As docg3 is intolerant against reentrancy, especially because of its weird register access (ie. a register read is performed by a first register write), each access to the docg3 IO space must be locked. Lock the IO space with a mutex, shared by all chips on the same cascade, as they all share the same IO space. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
371 lines
10 KiB
C
371 lines
10 KiB
C
/*
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* Handles the M-Systems DiskOnChip G3 chip
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*
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* Copyright (C) 2011 Robert Jarzmik
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef _MTD_DOCG3_H
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#define _MTD_DOCG3_H
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#include <linux/mtd/mtd.h>
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/*
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* Flash memory areas :
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* - 0x0000 .. 0x07ff : IPL
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* - 0x0800 .. 0x0fff : Data area
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* - 0x1000 .. 0x17ff : Registers
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* - 0x1800 .. 0x1fff : Unknown
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*/
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#define DOC_IOSPACE_IPL 0x0000
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#define DOC_IOSPACE_DATA 0x0800
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#define DOC_IOSPACE_SIZE 0x2000
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/*
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* DOC G3 layout and adressing scheme
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* A page address for the block "b", plane "P" and page "p":
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* address = [bbbb bPpp pppp]
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*/
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#define DOC_ADDR_PAGE_MASK 0x3f
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#define DOC_ADDR_BLOCK_SHIFT 6
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#define DOC_LAYOUT_NBPLANES 2
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#define DOC_LAYOUT_PAGES_PER_BLOCK 64
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#define DOC_LAYOUT_PAGE_SIZE 512
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#define DOC_LAYOUT_OOB_SIZE 16
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#define DOC_LAYOUT_WEAR_SIZE 8
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#define DOC_LAYOUT_PAGE_OOB_SIZE \
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(DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_SIZE)
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#define DOC_LAYOUT_WEAR_OFFSET (DOC_LAYOUT_PAGE_OOB_SIZE * 2)
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#define DOC_LAYOUT_BLOCK_SIZE \
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(DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_PAGE_SIZE)
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/*
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* ECC related constants
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*/
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#define DOC_ECC_BCH_M 14
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#define DOC_ECC_BCH_T 4
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#define DOC_ECC_BCH_PRIMPOLY 0x4443
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#define DOC_ECC_BCH_SIZE 7
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#define DOC_ECC_BCH_COVERED_BYTES \
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(DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_PAGEINFO_SZ + \
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DOC_LAYOUT_OOB_HAMMING_SZ)
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#define DOC_ECC_BCH_TOTAL_BYTES \
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(DOC_ECC_BCH_COVERED_BYTES + DOC_LAYOUT_OOB_BCH_SZ)
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/*
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* Blocks distribution
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*/
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#define DOC_LAYOUT_BLOCK_BBT 0
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#define DOC_LAYOUT_BLOCK_OTP 0
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#define DOC_LAYOUT_BLOCK_FIRST_DATA 6
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#define DOC_LAYOUT_PAGE_BBT 4
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/*
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* Extra page OOB (16 bytes wide) layout
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*/
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#define DOC_LAYOUT_OOB_PAGEINFO_OFS 0
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#define DOC_LAYOUT_OOB_HAMMING_OFS 7
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#define DOC_LAYOUT_OOB_BCH_OFS 8
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#define DOC_LAYOUT_OOB_UNUSED_OFS 15
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#define DOC_LAYOUT_OOB_PAGEINFO_SZ 7
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#define DOC_LAYOUT_OOB_HAMMING_SZ 1
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#define DOC_LAYOUT_OOB_BCH_SZ 7
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#define DOC_LAYOUT_OOB_UNUSED_SZ 1
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#define DOC_CHIPID_G3 0x200
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#define DOC_ERASE_MARK 0xaa
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#define DOC_MAX_NBFLOORS 4
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/*
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* Flash registers
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*/
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#define DOC_CHIPID 0x1000
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#define DOC_TEST 0x1004
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#define DOC_BUSLOCK 0x1006
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#define DOC_ENDIANCONTROL 0x1008
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#define DOC_DEVICESELECT 0x100a
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#define DOC_ASICMODE 0x100c
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#define DOC_CONFIGURATION 0x100e
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#define DOC_INTERRUPTCONTROL 0x1010
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#define DOC_READADDRESS 0x101a
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#define DOC_DATAEND 0x101e
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#define DOC_INTERRUPTSTATUS 0x1020
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#define DOC_FLASHSEQUENCE 0x1032
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#define DOC_FLASHCOMMAND 0x1034
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#define DOC_FLASHADDRESS 0x1036
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#define DOC_FLASHCONTROL 0x1038
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#define DOC_NOP 0x103e
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#define DOC_ECCCONF0 0x1040
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#define DOC_ECCCONF1 0x1042
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#define DOC_ECCPRESET 0x1044
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#define DOC_HAMMINGPARITY 0x1046
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#define DOC_BCH_HW_ECC(idx) (0x1048 + idx)
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#define DOC_PROTECTION 0x1056
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#define DOC_DPS0_KEY 0x105c
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#define DOC_DPS1_KEY 0x105e
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#define DOC_DPS0_ADDRLOW 0x1060
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#define DOC_DPS0_ADDRHIGH 0x1062
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#define DOC_DPS1_ADDRLOW 0x1064
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#define DOC_DPS1_ADDRHIGH 0x1066
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#define DOC_DPS0_STATUS 0x106c
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#define DOC_DPS1_STATUS 0x106e
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#define DOC_ASICMODECONFIRM 0x1072
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#define DOC_CHIPID_INV 0x1074
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#define DOC_POWERMODE 0x107c
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/*
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* Flash sequences
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* A sequence is preset before one or more commands are input to the chip.
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*/
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#define DOC_SEQ_RESET 0x00
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#define DOC_SEQ_PAGE_SIZE_532 0x03
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#define DOC_SEQ_SET_FASTMODE 0x05
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#define DOC_SEQ_SET_RELIABLEMODE 0x09
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#define DOC_SEQ_READ 0x12
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#define DOC_SEQ_SET_PLANE1 0x0e
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#define DOC_SEQ_SET_PLANE2 0x10
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#define DOC_SEQ_PAGE_SETUP 0x1d
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#define DOC_SEQ_ERASE 0x27
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#define DOC_SEQ_PLANES_STATUS 0x31
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/*
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* Flash commands
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*/
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#define DOC_CMD_READ_PLANE1 0x00
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#define DOC_CMD_SET_ADDR_READ 0x05
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#define DOC_CMD_READ_ALL_PLANES 0x30
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#define DOC_CMD_READ_PLANE2 0x50
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#define DOC_CMD_READ_FLASH 0xe0
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#define DOC_CMD_PAGE_SIZE_532 0x3c
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#define DOC_CMD_PROG_BLOCK_ADDR 0x60
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#define DOC_CMD_PROG_CYCLE1 0x80
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#define DOC_CMD_PROG_CYCLE2 0x10
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#define DOC_CMD_PROG_CYCLE3 0x11
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#define DOC_CMD_ERASECYCLE2 0xd0
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#define DOC_CMD_READ_STATUS 0x70
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#define DOC_CMD_PLANES_STATUS 0x71
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#define DOC_CMD_RELIABLE_MODE 0x22
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#define DOC_CMD_FAST_MODE 0xa2
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#define DOC_CMD_RESET 0xff
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/*
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* Flash register : DOC_FLASHCONTROL
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*/
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#define DOC_CTRL_VIOLATION 0x20
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#define DOC_CTRL_CE 0x10
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#define DOC_CTRL_UNKNOWN_BITS 0x08
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#define DOC_CTRL_PROTECTION_ERROR 0x04
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#define DOC_CTRL_SEQUENCE_ERROR 0x02
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#define DOC_CTRL_FLASHREADY 0x01
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/*
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* Flash register : DOC_ASICMODE
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*/
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#define DOC_ASICMODE_RESET 0x00
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#define DOC_ASICMODE_NORMAL 0x01
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#define DOC_ASICMODE_POWERDOWN 0x02
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#define DOC_ASICMODE_MDWREN 0x04
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#define DOC_ASICMODE_BDETCT_RESET 0x08
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#define DOC_ASICMODE_RSTIN_RESET 0x10
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#define DOC_ASICMODE_RAM_WE 0x20
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/*
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* Flash register : DOC_ECCCONF0
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*/
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#define DOC_ECCCONF0_WRITE_MODE 0x0000
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#define DOC_ECCCONF0_READ_MODE 0x8000
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#define DOC_ECCCONF0_AUTO_ECC_ENABLE 0x4000
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#define DOC_ECCCONF0_HAMMING_ENABLE 0x1000
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#define DOC_ECCCONF0_BCH_ENABLE 0x0800
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#define DOC_ECCCONF0_DATA_BYTES_MASK 0x07ff
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/*
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* Flash register : DOC_ECCCONF1
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*/
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#define DOC_ECCCONF1_BCH_SYNDROM_ERR 0x80
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#define DOC_ECCCONF1_UNKOWN1 0x40
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#define DOC_ECCCONF1_PAGE_IS_WRITTEN 0x20
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#define DOC_ECCCONF1_UNKOWN3 0x10
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#define DOC_ECCCONF1_HAMMING_BITS_MASK 0x0f
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/*
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* Flash register : DOC_PROTECTION
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*/
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#define DOC_PROTECT_FOUNDRY_OTP_LOCK 0x01
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#define DOC_PROTECT_CUSTOMER_OTP_LOCK 0x02
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#define DOC_PROTECT_LOCK_INPUT 0x04
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#define DOC_PROTECT_STICKY_LOCK 0x08
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#define DOC_PROTECT_PROTECTION_ENABLED 0x10
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#define DOC_PROTECT_IPL_DOWNLOAD_LOCK 0x20
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#define DOC_PROTECT_PROTECTION_ERROR 0x80
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/*
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* Flash register : DOC_DPS0_STATUS and DOC_DPS1_STATUS
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*/
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#define DOC_DPS_OTP_PROTECTED 0x01
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#define DOC_DPS_READ_PROTECTED 0x02
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#define DOC_DPS_WRITE_PROTECTED 0x04
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#define DOC_DPS_HW_LOCK_ENABLED 0x08
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#define DOC_DPS_KEY_OK 0x80
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/*
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* Flash register : DOC_CONFIGURATION
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*/
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#define DOC_CONF_IF_CFG 0x80
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#define DOC_CONF_MAX_ID_MASK 0x30
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#define DOC_CONF_VCCQ_3V 0x01
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/*
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* Flash register : DOC_READADDRESS
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*/
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#define DOC_READADDR_INC 0x8000
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#define DOC_READADDR_ONE_BYTE 0x4000
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#define DOC_READADDR_ADDR_MASK 0x1fff
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/*
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* Flash register : DOC_POWERMODE
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*/
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#define DOC_POWERDOWN_READY 0x80
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/*
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* Status of erase and write operation
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*/
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#define DOC_PLANES_STATUS_FAIL 0x01
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#define DOC_PLANES_STATUS_PLANE0_KO 0x02
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#define DOC_PLANES_STATUS_PLANE1_KO 0x04
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/*
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* DPS key management
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*
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* Each floor of docg3 has 2 protection areas: DPS0 and DPS1. These areas span
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* across block boundaries, and define whether these blocks can be read or
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* written.
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* The definition is dynamically stored in page 0 of blocks (2,3) for DPS0, and
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* page 0 of blocks (4,5) for DPS1.
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*/
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#define DOC_LAYOUT_DPS_KEY_LENGTH 8
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/**
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* struct docg3_cascade - Cascade of 1 to 4 docg3 chips
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* @floors: floors (ie. one physical docg3 chip is one floor)
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* @base: IO space to access all chips in the cascade
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* @bch: the BCH correcting control structure
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* @lock: lock to protect docg3 IO space from concurrent accesses
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*/
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struct docg3_cascade {
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struct mtd_info *floors[DOC_MAX_NBFLOORS];
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void __iomem *base;
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struct bch_control *bch;
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struct mutex lock;
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};
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/**
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* struct docg3 - DiskOnChip driver private data
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* @dev: the device currently under control
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* @cascade: the cascade this device belongs to
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* @device_id: number of the cascaded DoCG3 device (0, 1, 2 or 3)
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* @if_cfg: if true, reads are on 16bits, else reads are on 8bits
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* @reliable: if 0, docg3 in normal mode, if 1 docg3 in fast mode, if 2 in
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* reliable mode
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* Fast mode implies more errors than normal mode.
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* Reliable mode implies that page 2*n and 2*n+1 are clones.
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* @bbt: bad block table cache
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* @oob_write_ofs: offset of the MTD where this OOB should belong (ie. in next
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* page_write)
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* @oob_autoecc: if 1, use only bytes 0-7, 15, and fill the others with HW ECC
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* if 0, use all the 16 bytes.
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* @oob_write_buf: prepared OOB for next page_write
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* @debugfs_root: debugfs root node
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*/
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struct docg3 {
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struct device *dev;
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struct docg3_cascade *cascade;
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unsigned int device_id:4;
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unsigned int if_cfg:1;
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unsigned int reliable:2;
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int max_block;
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u8 *bbt;
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loff_t oob_write_ofs;
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int oob_autoecc;
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u8 oob_write_buf[DOC_LAYOUT_OOB_SIZE];
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struct dentry *debugfs_root;
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};
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#define doc_err(fmt, arg...) dev_err(docg3->dev, (fmt), ## arg)
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#define doc_info(fmt, arg...) dev_info(docg3->dev, (fmt), ## arg)
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#define doc_dbg(fmt, arg...) dev_dbg(docg3->dev, (fmt), ## arg)
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#define doc_vdbg(fmt, arg...) dev_vdbg(docg3->dev, (fmt), ## arg)
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#define DEBUGFS_RO_ATTR(name, show_fct) \
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static int name##_open(struct inode *inode, struct file *file) \
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{ return single_open(file, show_fct, inode->i_private); } \
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static const struct file_operations name##_fops = { \
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.owner = THIS_MODULE, \
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.open = name##_open, \
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.llseek = seq_lseek, \
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.read = seq_read, \
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.release = single_release \
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};
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#endif
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/*
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* Trace events part
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM docg3
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#if !defined(_MTD_DOCG3_TRACE) || defined(TRACE_HEADER_MULTI_READ)
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#define _MTD_DOCG3_TRACE
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#include <linux/tracepoint.h>
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TRACE_EVENT(docg3_io,
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TP_PROTO(int op, int width, u16 reg, int val),
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TP_ARGS(op, width, reg, val),
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TP_STRUCT__entry(
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__field(int, op)
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__field(unsigned char, width)
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__field(u16, reg)
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__field(int, val)),
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TP_fast_assign(
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__entry->op = op;
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__entry->width = width;
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__entry->reg = reg;
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__entry->val = val;),
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TP_printk("docg3: %s%02d reg=%04x, val=%04x",
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__entry->op ? "write" : "read", __entry->width,
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__entry->reg, __entry->val)
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);
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#endif
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/* This part must be outside protection */
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#undef TRACE_INCLUDE_PATH
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_PATH .
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#define TRACE_INCLUDE_FILE docg3
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#include <trace/define_trace.h>
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