mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 07:36:56 +07:00
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
/*
|
|
* 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>
|