u-boot/drivers/mtd/onenand/onenand_base.c
Stefan Roese 1ae3986204 OneNAND: Additional sync with 2.6.27
- Add subpage write support
- Add onenand_oob_64/32 ecclayout

This has been missing and without it UBI has some incompatibilies issues
with the current (>= 2.6.27) Linux kernel version. vid_hdr_offset is
placed differently (2048 instead of 512) without this fix.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
2009-01-23 10:32:48 -06:00

2200 lines
56 KiB
C

/*
* linux/drivers/mtd/onenand/onenand_base.c
*
* Copyright (C) 2005-2007 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* Credits:
* Adrian Hunter <ext-adrian.hunter@nokia.com>:
* auto-placement support, read-while load support, various fixes
* Copyright (C) Nokia Corporation, 2007
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <common.h>
#include <linux/mtd/compat.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/onenand.h>
#include <asm/io.h>
#include <asm/errno.h>
#include <malloc.h>
/* It should access 16-bit instead of 8-bit */
static inline void *memcpy_16(void *dst, const void *src, unsigned int len)
{
void *ret = dst;
short *d = dst;
const short *s = src;
len >>= 1;
while (len-- > 0)
*d++ = *s++;
return ret;
}
/**
* onenand_oob_64 - oob info for large (2KB) page
*/
static struct nand_ecclayout onenand_oob_64 = {
.eccbytes = 20,
.eccpos = {
8, 9, 10, 11, 12,
24, 25, 26, 27, 28,
40, 41, 42, 43, 44,
56, 57, 58, 59, 60,
},
.oobfree = {
{2, 3}, {14, 2}, {18, 3}, {30, 2},
{34, 3}, {46, 2}, {50, 3}, {62, 2}
}
};
/**
* onenand_oob_32 - oob info for middle (1KB) page
*/
static struct nand_ecclayout onenand_oob_32 = {
.eccbytes = 10,
.eccpos = {
8, 9, 10, 11, 12,
24, 25, 26, 27, 28,
},
.oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
};
static const unsigned char ffchars[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */
};
/**
* onenand_readw - [OneNAND Interface] Read OneNAND register
* @param addr address to read
*
* Read OneNAND register
*/
static unsigned short onenand_readw(void __iomem * addr)
{
return readw(addr);
}
/**
* onenand_writew - [OneNAND Interface] Write OneNAND register with value
* @param value value to write
* @param addr address to write
*
* Write OneNAND register with value
*/
static void onenand_writew(unsigned short value, void __iomem * addr)
{
writew(value, addr);
}
/**
* onenand_block_address - [DEFAULT] Get block address
* @param device the device id
* @param block the block
* @return translated block address if DDP, otherwise same
*
* Setup Start Address 1 Register (F100h)
*/
static int onenand_block_address(struct onenand_chip *this, int block)
{
/* Device Flash Core select, NAND Flash Block Address */
if (block & this->density_mask)
return ONENAND_DDP_CHIP1 | (block ^ this->density_mask);
return block;
}
/**
* onenand_bufferram_address - [DEFAULT] Get bufferram address
* @param device the device id
* @param block the block
* @return set DBS value if DDP, otherwise 0
*
* Setup Start Address 2 Register (F101h) for DDP
*/
static int onenand_bufferram_address(struct onenand_chip *this, int block)
{
/* Device BufferRAM Select */
if (block & this->density_mask)
return ONENAND_DDP_CHIP1;
return ONENAND_DDP_CHIP0;
}
/**
* onenand_page_address - [DEFAULT] Get page address
* @param page the page address
* @param sector the sector address
* @return combined page and sector address
*
* Setup Start Address 8 Register (F107h)
*/
static int onenand_page_address(int page, int sector)
{
/* Flash Page Address, Flash Sector Address */
int fpa, fsa;
fpa = page & ONENAND_FPA_MASK;
fsa = sector & ONENAND_FSA_MASK;
return ((fpa << ONENAND_FPA_SHIFT) | fsa);
}
/**
* onenand_buffer_address - [DEFAULT] Get buffer address
* @param dataram1 DataRAM index
* @param sectors the sector address
* @param count the number of sectors
* @return the start buffer value
*
* Setup Start Buffer Register (F200h)
*/
static int onenand_buffer_address(int dataram1, int sectors, int count)
{
int bsa, bsc;
/* BufferRAM Sector Address */
bsa = sectors & ONENAND_BSA_MASK;
if (dataram1)
bsa |= ONENAND_BSA_DATARAM1; /* DataRAM1 */
else
bsa |= ONENAND_BSA_DATARAM0; /* DataRAM0 */
/* BufferRAM Sector Count */
bsc = count & ONENAND_BSC_MASK;
return ((bsa << ONENAND_BSA_SHIFT) | bsc);
}
/**
* onenand_get_density - [DEFAULT] Get OneNAND density
* @param dev_id OneNAND device ID
*
* Get OneNAND density from device ID
*/
static inline int onenand_get_density(int dev_id)
{
int density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
return (density & ONENAND_DEVICE_DENSITY_MASK);
}
/**
* onenand_command - [DEFAULT] Send command to OneNAND device
* @param mtd MTD device structure
* @param cmd the command to be sent
* @param addr offset to read from or write to
* @param len number of bytes to read or write
*
* Send command to OneNAND device. This function is used for middle/large page
* devices (1KB/2KB Bytes per page)
*/
static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr,
size_t len)
{
struct onenand_chip *this = mtd->priv;
int value, readcmd = 0;
int block, page;
/* Now we use page size operation */
int sectors = 4, count = 4;
/* Address translation */
switch (cmd) {
case ONENAND_CMD_UNLOCK:
case ONENAND_CMD_LOCK:
case ONENAND_CMD_LOCK_TIGHT:
case ONENAND_CMD_UNLOCK_ALL:
block = -1;
page = -1;
break;
case ONENAND_CMD_ERASE:
case ONENAND_CMD_BUFFERRAM:
block = (int)(addr >> this->erase_shift);
page = -1;
break;
default:
block = (int)(addr >> this->erase_shift);
page = (int)(addr >> this->page_shift);
page &= this->page_mask;
break;
}
/* NOTE: The setting order of the registers is very important! */
if (cmd == ONENAND_CMD_BUFFERRAM) {
/* Select DataRAM for DDP */
value = onenand_bufferram_address(this, block);
this->write_word(value,
this->base + ONENAND_REG_START_ADDRESS2);
/* Switch to the next data buffer */
ONENAND_SET_NEXT_BUFFERRAM(this);
return 0;
}
if (block != -1) {
/* Write 'DFS, FBA' of Flash */
value = onenand_block_address(this, block);
this->write_word(value,
this->base + ONENAND_REG_START_ADDRESS1);
/* Write 'DFS, FBA' of Flash */
value = onenand_bufferram_address(this, block);
this->write_word(value,
this->base + ONENAND_REG_START_ADDRESS2);
}
if (page != -1) {
int dataram;
switch (cmd) {
case ONENAND_CMD_READ:
case ONENAND_CMD_READOOB:
dataram = ONENAND_SET_NEXT_BUFFERRAM(this);
readcmd = 1;
break;
default:
dataram = ONENAND_CURRENT_BUFFERRAM(this);
break;
}
/* Write 'FPA, FSA' of Flash */
value = onenand_page_address(page, sectors);
this->write_word(value,
this->base + ONENAND_REG_START_ADDRESS8);
/* Write 'BSA, BSC' of DataRAM */
value = onenand_buffer_address(dataram, sectors, count);
this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
}
/* Interrupt clear */
this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT);
/* Write command */
this->write_word(cmd, this->base + ONENAND_REG_COMMAND);
return 0;
}
/**
* onenand_wait - [DEFAULT] wait until the command is done
* @param mtd MTD device structure
* @param state state to select the max. timeout value
*
* Wait for command done. This applies to all OneNAND command
* Read can take up to 30us, erase up to 2ms and program up to 350us
* according to general OneNAND specs
*/
static int onenand_wait(struct mtd_info *mtd, int state)
{
struct onenand_chip *this = mtd->priv;
unsigned int flags = ONENAND_INT_MASTER;
unsigned int interrupt = 0;
unsigned int ctrl, ecc;
while (1) {
interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
if (interrupt & flags)
break;
}
ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
if (ctrl & ONENAND_CTRL_ERROR) {
printk("onenand_wait: controller error = 0x%04x\n", ctrl);
if (ctrl & ONENAND_CTRL_LOCK)
printk("onenand_wait: it's locked error = 0x%04x\n",
ctrl);
return -EIO;
}
if (interrupt & ONENAND_INT_READ) {
ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
if (ecc & ONENAND_ECC_2BIT_ALL) {
MTDDEBUG (MTD_DEBUG_LEVEL0,
"onenand_wait: ECC error = 0x%04x\n", ecc);
return -EBADMSG;
}
}
return 0;
}
/**
* onenand_bufferram_offset - [DEFAULT] BufferRAM offset
* @param mtd MTD data structure
* @param area BufferRAM area
* @return offset given area
*
* Return BufferRAM offset given area
*/
static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area)
{
struct onenand_chip *this = mtd->priv;
if (ONENAND_CURRENT_BUFFERRAM(this)) {
if (area == ONENAND_DATARAM)
return mtd->writesize;
if (area == ONENAND_SPARERAM)
return mtd->oobsize;
}
return 0;
}
/**
* onenand_read_bufferram - [OneNAND Interface] Read the bufferram area
* @param mtd MTD data structure
* @param area BufferRAM area
* @param buffer the databuffer to put/get data
* @param offset offset to read from or write to
* @param count number of bytes to read/write
*
* Read the BufferRAM area
*/
static int onenand_read_bufferram(struct mtd_info *mtd, loff_t addr, int area,
unsigned char *buffer, int offset,
size_t count)
{
struct onenand_chip *this = mtd->priv;
void __iomem *bufferram;
bufferram = this->base + area;
bufferram += onenand_bufferram_offset(mtd, area);
memcpy_16(buffer, bufferram + offset, count);
return 0;
}
/**
* onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
* @param mtd MTD data structure
* @param area BufferRAM area
* @param buffer the databuffer to put/get data
* @param offset offset to read from or write to
* @param count number of bytes to read/write
*
* Read the BufferRAM area with Sync. Burst Mode
*/
static int onenand_sync_read_bufferram(struct mtd_info *mtd, loff_t addr, int area,
unsigned char *buffer, int offset,
size_t count)
{
struct onenand_chip *this = mtd->priv;
void __iomem *bufferram;
bufferram = this->base + area;
bufferram += onenand_bufferram_offset(mtd, area);
this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
memcpy_16(buffer, bufferram + offset, count);
this->mmcontrol(mtd, 0);
return 0;
}
/**
* onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
* @param mtd MTD data structure
* @param area BufferRAM area
* @param buffer the databuffer to put/get data
* @param offset offset to read from or write to
* @param count number of bytes to read/write
*
* Write the BufferRAM area
*/
static int onenand_write_bufferram(struct mtd_info *mtd, loff_t addr, int area,
const unsigned char *buffer, int offset,
size_t count)
{
struct onenand_chip *this = mtd->priv;
void __iomem *bufferram;
bufferram = this->base + area;
bufferram += onenand_bufferram_offset(mtd, area);
memcpy_16(bufferram + offset, buffer, count);
return 0;
}
/**
* onenand_get_2x_blockpage - [GENERIC] Get blockpage at 2x program mode
* @param mtd MTD data structure
* @param addr address to check
* @return blockpage address
*
* Get blockpage address at 2x program mode
*/
static int onenand_get_2x_blockpage(struct mtd_info *mtd, loff_t addr)
{
struct onenand_chip *this = mtd->priv;
int blockpage, block, page;
/* Calculate the even block number */
block = (int) (addr >> this->erase_shift) & ~1;
/* Is it the odd plane? */
if (addr & this->writesize)
block++;
page = (int) (addr >> (this->page_shift + 1)) & this->page_mask;
blockpage = (block << 7) | page;
return blockpage;
}
/**
* onenand_check_bufferram - [GENERIC] Check BufferRAM information
* @param mtd MTD data structure
* @param addr address to check
* @return 1 if there are valid data, otherwise 0
*
* Check bufferram if there is data we required
*/
static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
{
struct onenand_chip *this = mtd->priv;
int blockpage, found = 0;
unsigned int i;
#ifdef CONFIG_S3C64XX
return 0;
#endif
if (ONENAND_IS_2PLANE(this))
blockpage = onenand_get_2x_blockpage(mtd, addr);
else
blockpage = (int) (addr >> this->page_shift);
/* Is there valid data? */
i = ONENAND_CURRENT_BUFFERRAM(this);
if (this->bufferram[i].blockpage == blockpage)
found = 1;
else {
/* Check another BufferRAM */
i = ONENAND_NEXT_BUFFERRAM(this);
if (this->bufferram[i].blockpage == blockpage) {
ONENAND_SET_NEXT_BUFFERRAM(this);
found = 1;
}
}
if (found && ONENAND_IS_DDP(this)) {
/* Select DataRAM for DDP */
int block = (int) (addr >> this->erase_shift);
int value = onenand_bufferram_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
}
return found;
}
/**
* onenand_update_bufferram - [GENERIC] Update BufferRAM information
* @param mtd MTD data structure
* @param addr address to update
* @param valid valid flag
*
* Update BufferRAM information
*/
static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
int valid)
{
struct onenand_chip *this = mtd->priv;
int blockpage;
unsigned int i;
if (ONENAND_IS_2PLANE(this))
blockpage = onenand_get_2x_blockpage(mtd, addr);
else
blockpage = (int)(addr >> this->page_shift);
/* Invalidate another BufferRAM */
i = ONENAND_NEXT_BUFFERRAM(this);
if (this->bufferram[i].blockpage == blockpage)
this->bufferram[i].blockpage = -1;
/* Update BufferRAM */
i = ONENAND_CURRENT_BUFFERRAM(this);
if (valid)
this->bufferram[i].blockpage = blockpage;
else
this->bufferram[i].blockpage = -1;
return 0;
}
/**
* onenand_invalidate_bufferram - [GENERIC] Invalidate BufferRAM information
* @param mtd MTD data structure
* @param addr start address to invalidate
* @param len length to invalidate
*
* Invalidate BufferRAM information
*/
static void onenand_invalidate_bufferram(struct mtd_info *mtd, loff_t addr,
unsigned int len)
{
struct onenand_chip *this = mtd->priv;
int i;
loff_t end_addr = addr + len;
/* Invalidate BufferRAM */
for (i = 0; i < MAX_BUFFERRAM; i++) {
loff_t buf_addr = this->bufferram[i].blockpage << this->page_shift;
if (buf_addr >= addr && buf_addr < end_addr)
this->bufferram[i].blockpage = -1;
}
}
/**
* onenand_get_device - [GENERIC] Get chip for selected access
* @param mtd MTD device structure
* @param new_state the state which is requested
*
* Get the device and lock it for exclusive access
*/
static void onenand_get_device(struct mtd_info *mtd, int new_state)
{
/* Do nothing */
}
/**
* onenand_release_device - [GENERIC] release chip
* @param mtd MTD device structure
*
* Deselect, release chip lock and wake up anyone waiting on the device
*/
static void onenand_release_device(struct mtd_info *mtd)
{
/* Do nothing */
}
/**
* onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
* @param mtd MTD device structure
* @param buf destination address
* @param column oob offset to read from
* @param thislen oob length to read
*/
static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf,
int column, int thislen)
{
struct onenand_chip *this = mtd->priv;
struct nand_oobfree *free;
int readcol = column;
int readend = column + thislen;
int lastgap = 0;
unsigned int i;
uint8_t *oob_buf = this->oob_buf;
free = this->ecclayout->oobfree;
for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
if (readcol >= lastgap)
readcol += free->offset - lastgap;
if (readend >= lastgap)
readend += free->offset - lastgap;
lastgap = free->offset + free->length;
}
this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
free = this->ecclayout->oobfree;
for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
int free_end = free->offset + free->length;
if (free->offset < readend && free_end > readcol) {
int st = max_t(int,free->offset,readcol);
int ed = min_t(int,free_end,readend);
int n = ed - st;
memcpy(buf, oob_buf + st, n);
buf += n;
} else if (column == 0)
break;
}
return 0;
}
/**
* onenand_read_ops_nolock - [OneNAND Interface] OneNAND read main and/or out-of-band
* @param mtd MTD device structure
* @param from offset to read from
* @param ops oob operation description structure
*
* OneNAND read main and/or out-of-band data
*/
static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
struct mtd_ecc_stats stats;
size_t len = ops->len;
size_t ooblen = ops->ooblen;
u_char *buf = ops->datbuf;
u_char *oobbuf = ops->oobbuf;
int read = 0, column, thislen;
int oobread = 0, oobcolumn, thisooblen, oobsize;
int ret = 0, boundary = 0;
int writesize = this->writesize;
MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ops_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
if (ops->mode == MTD_OOB_AUTO)
oobsize = this->ecclayout->oobavail;
else
oobsize = mtd->oobsize;
oobcolumn = from & (mtd->oobsize - 1);
/* Do not allow reads past end of device */
if ((from + len) > mtd->size) {
printk(KERN_ERR "onenand_read_ops_nolock: Attempt read beyond end of device\n");
ops->retlen = 0;
ops->oobretlen = 0;
return -EINVAL;
}
stats = mtd->ecc_stats;
/* Read-while-load method */
/* Do first load to bufferRAM */
if (read < len) {
if (!onenand_check_bufferram(mtd, from)) {
this->main_buf = buf;
this->command(mtd, ONENAND_CMD_READ, from, writesize);
ret = this->wait(mtd, FL_READING);
onenand_update_bufferram(mtd, from, !ret);
if (ret == -EBADMSG)
ret = 0;
}
}
thislen = min_t(int, writesize, len - read);
column = from & (writesize - 1);
if (column + thislen > writesize)
thislen = writesize - column;
while (!ret) {
/* If there is more to load then start next load */
from += thislen;
if (read + thislen < len) {
this->main_buf = buf + thislen;
this->command(mtd, ONENAND_CMD_READ, from, writesize);
/*
* Chip boundary handling in DDP
* Now we issued chip 1 read and pointed chip 1
* bufferam so we have to point chip 0 bufferam.
*/
if (ONENAND_IS_DDP(this) &&
unlikely(from == (this->chipsize >> 1))) {
this->write_word(ONENAND_DDP_CHIP0, this->base + ONENAND_REG_START_ADDRESS2);
boundary = 1;
} else
boundary = 0;
ONENAND_SET_PREV_BUFFERRAM(this);
}
/* While load is going, read from last bufferRAM */
this->read_bufferram(mtd, from - thislen, ONENAND_DATARAM, buf, column, thislen);
/* Read oob area if needed */
if (oobbuf) {
thisooblen = oobsize - oobcolumn;
thisooblen = min_t(int, thisooblen, ooblen - oobread);
if (ops->mode == MTD_OOB_AUTO)
onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
else
this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
oobread += thisooblen;
oobbuf += thisooblen;
oobcolumn = 0;
}
/* See if we are done */
read += thislen;
if (read == len)
break;
/* Set up for next read from bufferRAM */
if (unlikely(boundary))
this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2);
ONENAND_SET_NEXT_BUFFERRAM(this);
buf += thislen;
thislen = min_t(int, writesize, len - read);
column = 0;
/* Now wait for load */
ret = this->wait(mtd, FL_READING);
onenand_update_bufferram(mtd, from, !ret);
if (ret == -EBADMSG)
ret = 0;
}
/*
* Return success, if no ECC failures, else -EBADMSG
* fs driver will take care of that, because
* retlen == desired len and result == -EBADMSG
*/
ops->retlen = read;
ops->oobretlen = oobread;
if (ret)
return ret;
if (mtd->ecc_stats.failed - stats.failed)
return -EBADMSG;
return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
}
/**
* onenand_read_oob_nolock - [MTD Interface] OneNAND read out-of-band
* @param mtd MTD device structure
* @param from offset to read from
* @param ops oob operation description structure
*
* OneNAND read out-of-band data from the spare area
*/
static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
struct mtd_ecc_stats stats;
int read = 0, thislen, column, oobsize;
size_t len = ops->ooblen;
mtd_oob_mode_t mode = ops->mode;
u_char *buf = ops->oobbuf;
int ret = 0;
from += ops->ooboffs;
MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
/* Initialize return length value */
ops->oobretlen = 0;
if (mode == MTD_OOB_AUTO)
oobsize = this->ecclayout->oobavail;
else
oobsize = mtd->oobsize;
column = from & (mtd->oobsize - 1);
if (unlikely(column >= oobsize)) {
printk(KERN_ERR "onenand_read_oob_nolock: Attempted to start read outside oob\n");
return -EINVAL;
}
/* Do not allow reads past end of device */
if (unlikely(from >= mtd->size ||
column + len > ((mtd->size >> this->page_shift) -
(from >> this->page_shift)) * oobsize)) {
printk(KERN_ERR "onenand_read_oob_nolock: Attempted to read beyond end of device\n");
return -EINVAL;
}
stats = mtd->ecc_stats;
while (read < len) {
thislen = oobsize - column;
thislen = min_t(int, thislen, len);
this->spare_buf = buf;
this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
onenand_update_bufferram(mtd, from, 0);
ret = this->wait(mtd, FL_READING);
if (ret && ret != -EBADMSG) {
printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret);
break;
}
if (mode == MTD_OOB_AUTO)
onenand_transfer_auto_oob(mtd, buf, column, thislen);
else
this->read_bufferram(mtd, 0, ONENAND_SPARERAM, buf, column, thislen);
read += thislen;
if (read == len)
break;
buf += thislen;
/* Read more? */
if (read < len) {
/* Page size */
from += mtd->writesize;
column = 0;
}
}
ops->oobretlen = read;
if (ret)
return ret;
if (mtd->ecc_stats.failed - stats.failed)
return -EBADMSG;
return 0;
}
/**
* onenand_read - [MTD Interface] MTD compability function for onenand_read_ecc
* @param mtd MTD device structure
* @param from offset to read from
* @param len number of bytes to read
* @param retlen pointer to variable to store the number of read bytes
* @param buf the databuffer to put data
*
* This function simply calls onenand_read_ecc with oob buffer and oobsel = NULL
*/
int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t * retlen, u_char * buf)
{
struct mtd_oob_ops ops = {
.len = len,
.ooblen = 0,
.datbuf = buf,
.oobbuf = NULL,
};
int ret;
onenand_get_device(mtd, FL_READING);
ret = onenand_read_ops_nolock(mtd, from, &ops);
onenand_release_device(mtd);
*retlen = ops.retlen;
return ret;
}
/**
* onenand_read_oob - [MTD Interface] OneNAND read out-of-band
* @param mtd MTD device structure
* @param from offset to read from
* @param ops oob operations description structure
*
* OneNAND main and/or out-of-band
*/
int onenand_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
int ret;
switch (ops->mode) {
case MTD_OOB_PLACE:
case MTD_OOB_AUTO:
break;
case MTD_OOB_RAW:
/* Not implemented yet */
default:
return -EINVAL;
}
onenand_get_device(mtd, FL_READING);
if (ops->datbuf)
ret = onenand_read_ops_nolock(mtd, from, ops);
else
ret = onenand_read_oob_nolock(mtd, from, ops);
onenand_release_device(mtd);
return ret;
}
/**
* onenand_bbt_wait - [DEFAULT] wait until the command is done
* @param mtd MTD device structure
* @param state state to select the max. timeout value
*
* Wait for command done.
*/
static int onenand_bbt_wait(struct mtd_info *mtd, int state)
{
struct onenand_chip *this = mtd->priv;
unsigned int flags = ONENAND_INT_MASTER;
unsigned int interrupt;
unsigned int ctrl;
while (1) {
interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
if (interrupt & flags)
break;
}
/* To get correct interrupt status in timeout case */
interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
if (interrupt & ONENAND_INT_READ) {
int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
if (ecc & ONENAND_ECC_2BIT_ALL)
return ONENAND_BBT_READ_ERROR;
} else {
printk(KERN_ERR "onenand_bbt_wait: read timeout!"
"ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
return ONENAND_BBT_READ_FATAL_ERROR;
}
/* Initial bad block case: 0x2400 or 0x0400 */
if (ctrl & ONENAND_CTRL_ERROR) {
printk(KERN_DEBUG "onenand_bbt_wait: controller error = 0x%04x\n", ctrl);
return ONENAND_BBT_READ_ERROR;
}
return 0;
}
/**
* onenand_bbt_read_oob - [MTD Interface] OneNAND read out-of-band for bbt scan
* @param mtd MTD device structure
* @param from offset to read from
* @param ops oob operation description structure
*
* OneNAND read out-of-band data from the spare area for bbt scan
*/
int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
int read = 0, thislen, column;
int ret = 0;
size_t len = ops->ooblen;
u_char *buf = ops->oobbuf;
MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_bbt_read_oob: from = 0x%08x, len = %zi\n", (unsigned int) from, len);
/* Initialize return value */
ops->oobretlen = 0;
/* Do not allow reads past end of device */
if (unlikely((from + len) > mtd->size)) {
printk(KERN_ERR "onenand_bbt_read_oob: Attempt read beyond end of device\n");
return ONENAND_BBT_READ_FATAL_ERROR;
}
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_READING);
column = from & (mtd->oobsize - 1);
while (read < len) {
thislen = mtd->oobsize - column;
thislen = min_t(int, thislen, len);
this->spare_buf = buf;
this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
onenand_update_bufferram(mtd, from, 0);
ret = this->bbt_wait(mtd, FL_READING);
if (ret)
break;
this->read_spareram(mtd, 0, ONENAND_SPARERAM, buf, column, thislen);
read += thislen;
if (read == len)
break;
buf += thislen;
/* Read more? */
if (read < len) {
/* Update Page size */
from += this->writesize;
column = 0;
}
}
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
ops->oobretlen = read;
return ret;
}
#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
/**
* onenand_verify_oob - [GENERIC] verify the oob contents after a write
* @param mtd MTD device structure
* @param buf the databuffer to verify
* @param to offset to read from
*/
static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
{
struct onenand_chip *this = mtd->priv;
u_char *oob_buf = this->oob_buf;
int status, i;
this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize);
onenand_update_bufferram(mtd, to, 0);
status = this->wait(mtd, FL_READING);
if (status)
return status;
this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
for (i = 0; i < mtd->oobsize; i++)
if (buf[i] != 0xFF && buf[i] != oob_buf[i])
return -EBADMSG;
return 0;
}
/**
* onenand_verify - [GENERIC] verify the chip contents after a write
* @param mtd MTD device structure
* @param buf the databuffer to verify
* @param addr offset to read from
* @param len number of bytes to read and compare
*/
static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
{
struct onenand_chip *this = mtd->priv;
void __iomem *dataram;
int ret = 0;
int thislen, column;
while (len != 0) {
thislen = min_t(int, this->writesize, len);
column = addr & (this->writesize - 1);
if (column + thislen > this->writesize)
thislen = this->writesize - column;
this->command(mtd, ONENAND_CMD_READ, addr, this->writesize);
onenand_update_bufferram(mtd, addr, 0);
ret = this->wait(mtd, FL_READING);
if (ret)
return ret;
onenand_update_bufferram(mtd, addr, 1);
dataram = this->base + ONENAND_DATARAM;
dataram += onenand_bufferram_offset(mtd, ONENAND_DATARAM);
if (memcmp(buf, dataram + column, thislen))
return -EBADMSG;
len -= thislen;
buf += thislen;
addr += thislen;
}
return 0;
}
#else
#define onenand_verify(...) (0)
#define onenand_verify_oob(...) (0)
#endif
#define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
/**
* onenand_fill_auto_oob - [Internal] oob auto-placement transfer
* @param mtd MTD device structure
* @param oob_buf oob buffer
* @param buf source address
* @param column oob offset to write to
* @param thislen oob length to write
*/
static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
const u_char *buf, int column, int thislen)
{
struct onenand_chip *this = mtd->priv;
struct nand_oobfree *free;
int writecol = column;
int writeend = column + thislen;
int lastgap = 0;
unsigned int i;
free = this->ecclayout->oobfree;
for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
if (writecol >= lastgap)
writecol += free->offset - lastgap;
if (writeend >= lastgap)
writeend += free->offset - lastgap;
lastgap = free->offset + free->length;
}
free = this->ecclayout->oobfree;
for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
int free_end = free->offset + free->length;
if (free->offset < writeend && free_end > writecol) {
int st = max_t(int,free->offset,writecol);
int ed = min_t(int,free_end,writeend);
int n = ed - st;
memcpy(oob_buf + st, buf, n);
buf += n;
} else if (column == 0)
break;
}
return 0;
}
/**
* onenand_write_ops_nolock - [OneNAND Interface] write main and/or out-of-band
* @param mtd MTD device structure
* @param to offset to write to
* @param ops oob operation description structure
*
* Write main and/or oob with ECC
*/
static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
int written = 0, column, thislen, subpage;
int oobwritten = 0, oobcolumn, thisooblen, oobsize;
size_t len = ops->len;
size_t ooblen = ops->ooblen;
const u_char *buf = ops->datbuf;
const u_char *oob = ops->oobbuf;
u_char *oobbuf;
int ret = 0;
MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_write_ops_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
ops->retlen = 0;
ops->oobretlen = 0;
/* Do not allow writes past end of device */
if (unlikely((to + len) > mtd->size)) {
printk(KERN_ERR "onenand_write_ops_nolock: Attempt write to past end of device\n");
return -EINVAL;
}
/* Reject writes, which are not page aligned */
if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
printk(KERN_ERR "onenand_write_ops_nolock: Attempt to write not page aligned data\n");
return -EINVAL;
}
if (ops->mode == MTD_OOB_AUTO)
oobsize = this->ecclayout->oobavail;
else
oobsize = mtd->oobsize;
oobcolumn = to & (mtd->oobsize - 1);
column = to & (mtd->writesize - 1);
/* Loop until all data write */
while (written < len) {
u_char *wbuf = (u_char *) buf;
thislen = min_t(int, mtd->writesize - column, len - written);
thisooblen = min_t(int, oobsize - oobcolumn, ooblen - oobwritten);
this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
/* Partial page write */
subpage = thislen < mtd->writesize;
if (subpage) {
memset(this->page_buf, 0xff, mtd->writesize);
memcpy(this->page_buf + column, buf, thislen);
wbuf = this->page_buf;
}
this->write_bufferram(mtd, to, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
if (oob) {
oobbuf = this->oob_buf;
/* We send data to spare ram with oobsize
* * to prevent byte access */
memset(oobbuf, 0xff, mtd->oobsize);
if (ops->mode == MTD_OOB_AUTO)
onenand_fill_auto_oob(mtd, oobbuf, oob, oobcolumn, thisooblen);
else
memcpy(oobbuf + oobcolumn, oob, thisooblen);
oobwritten += thisooblen;
oob += thisooblen;
oobcolumn = 0;
} else
oobbuf = (u_char *) ffchars;
this->write_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
ret = this->wait(mtd, FL_WRITING);
/* In partial page write we don't update bufferram */
onenand_update_bufferram(mtd, to, !ret && !subpage);
if (ONENAND_IS_2PLANE(this)) {
ONENAND_SET_BUFFERRAM1(this);
onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage);
}
if (ret) {
printk(KERN_ERR "onenand_write_ops_nolock: write filaed %d\n", ret);
break;
}
/* Only check verify write turn on */
ret = onenand_verify(mtd, buf, to, thislen);
if (ret) {
printk(KERN_ERR "onenand_write_ops_nolock: verify failed %d\n", ret);
break;
}
written += thislen;
if (written == len)
break;
column = 0;
to += thislen;
buf += thislen;
}
ops->retlen = written;
return ret;
}
/**
* onenand_write_oob_nolock - [Internal] OneNAND write out-of-band
* @param mtd MTD device structure
* @param to offset to write to
* @param len number of bytes to write
* @param retlen pointer to variable to store the number of written bytes
* @param buf the data to write
* @param mode operation mode
*
* OneNAND write out-of-band
*/
static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
int column, ret = 0, oobsize;
int written = 0;
u_char *oobbuf;
size_t len = ops->ooblen;
const u_char *buf = ops->oobbuf;
mtd_oob_mode_t mode = ops->mode;
to += ops->ooboffs;
MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
ops->oobretlen = 0;
if (mode == MTD_OOB_AUTO)
oobsize = this->ecclayout->oobavail;
else
oobsize = mtd->oobsize;
column = to & (mtd->oobsize - 1);
if (unlikely(column >= oobsize)) {
printk(KERN_ERR "onenand_write_oob_nolock: Attempted to start write outside oob\n");
return -EINVAL;
}
/* For compatibility with NAND: Do not allow write past end of page */
if (unlikely(column + len > oobsize)) {
printk(KERN_ERR "onenand_write_oob_nolock: "
"Attempt to write past end of page\n");
return -EINVAL;
}
/* Do not allow reads past end of device */
if (unlikely(to >= mtd->size ||
column + len > ((mtd->size >> this->page_shift) -
(to >> this->page_shift)) * oobsize)) {
printk(KERN_ERR "onenand_write_oob_nolock: Attempted to write past end of device\n");
return -EINVAL;
}
oobbuf = this->oob_buf;
/* Loop until all data write */
while (written < len) {
int thislen = min_t(int, oobsize, len - written);
this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
/* We send data to spare ram with oobsize
* to prevent byte access */
memset(oobbuf, 0xff, mtd->oobsize);
if (mode == MTD_OOB_AUTO)
onenand_fill_auto_oob(mtd, oobbuf, buf, column, thislen);
else
memcpy(oobbuf + column, buf, thislen);
this->write_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
onenand_update_bufferram(mtd, to, 0);
if (ONENAND_IS_2PLANE(this)) {
ONENAND_SET_BUFFERRAM1(this);
onenand_update_bufferram(mtd, to + this->writesize, 0);
}
ret = this->wait(mtd, FL_WRITING);
if (ret) {
printk(KERN_ERR "onenand_write_oob_nolock: write failed %d\n", ret);
break;
}
ret = onenand_verify_oob(mtd, oobbuf, to);
if (ret) {
printk(KERN_ERR "onenand_write_oob_nolock: verify failed %d\n", ret);
break;
}
written += thislen;
if (written == len)
break;
to += mtd->writesize;
buf += thislen;
column = 0;
}
ops->oobretlen = written;
return ret;
}
/**
* onenand_write - [MTD Interface] compability function for onenand_write_ecc
* @param mtd MTD device structure
* @param to offset to write to
* @param len number of bytes to write
* @param retlen pointer to variable to store the number of written bytes
* @param buf the data to write
*
* Write with ECC
*/
int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t * retlen, const u_char * buf)
{
struct mtd_oob_ops ops = {
.len = len,
.ooblen = 0,
.datbuf = (u_char *) buf,
.oobbuf = NULL,
};
int ret;
onenand_get_device(mtd, FL_WRITING);
ret = onenand_write_ops_nolock(mtd, to, &ops);
onenand_release_device(mtd);
*retlen = ops.retlen;
return ret;
}
/**
* onenand_write_oob - [MTD Interface] OneNAND write out-of-band
* @param mtd MTD device structure
* @param to offset to write to
* @param ops oob operation description structure
*
* OneNAND write main and/or out-of-band
*/
int onenand_write_oob(struct mtd_info *mtd, loff_t to,
struct mtd_oob_ops *ops)
{
int ret;
switch (ops->mode) {
case MTD_OOB_PLACE:
case MTD_OOB_AUTO:
break;
case MTD_OOB_RAW:
/* Not implemented yet */
default:
return -EINVAL;
}
onenand_get_device(mtd, FL_WRITING);
if (ops->datbuf)
ret = onenand_write_ops_nolock(mtd, to, ops);
else
ret = onenand_write_oob_nolock(mtd, to, ops);
onenand_release_device(mtd);
return ret;
}
/**
* onenand_block_isbad_nolock - [GENERIC] Check if a block is marked bad
* @param mtd MTD device structure
* @param ofs offset from device start
* @param allowbbt 1, if its allowed to access the bbt area
*
* Check, if the block is bad, Either by reading the bad block table or
* calling of the scan function.
*/
static int onenand_block_isbad_nolock(struct mtd_info *mtd, loff_t ofs, int allowbbt)
{
struct onenand_chip *this = mtd->priv;
struct bbm_info *bbm = this->bbm;
/* Return info from the table */
return bbm->isbad_bbt(mtd, ofs, allowbbt);
}
/**
* onenand_erase - [MTD Interface] erase block(s)
* @param mtd MTD device structure
* @param instr erase instruction
*
* Erase one ore more blocks
*/
int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
{
struct onenand_chip *this = mtd->priv;
unsigned int block_size;
loff_t addr;
int len;
int ret = 0;
MTDDEBUG (MTD_DEBUG_LEVEL3,
"onenand_erase: start = 0x%08x, len = %i\n",
(unsigned int)instr->addr, (unsigned int)instr->len);
block_size = (1 << this->erase_shift);
/* Start address must align on block boundary */
if (unlikely(instr->addr & (block_size - 1))) {
MTDDEBUG (MTD_DEBUG_LEVEL0,
"onenand_erase: Unaligned address\n");
return -EINVAL;
}
/* Length must align on block boundary */
if (unlikely(instr->len & (block_size - 1))) {
MTDDEBUG (MTD_DEBUG_LEVEL0,
"onenand_erase: Length not block aligned\n");
return -EINVAL;
}
/* Do not allow erase past end of device */
if (unlikely((instr->len + instr->addr) > mtd->size)) {
MTDDEBUG (MTD_DEBUG_LEVEL0,
"onenand_erase: Erase past end of device\n");
return -EINVAL;
}
instr->fail_addr = 0xffffffff;
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_ERASING);
/* Loop throught the pages */
len = instr->len;
addr = instr->addr;
instr->state = MTD_ERASING;
while (len) {
/* Check if we have a bad block, we do not erase bad blocks */
if (instr->priv == 0 && onenand_block_isbad_nolock(mtd, addr, 0)) {
printk(KERN_WARNING "onenand_erase: attempt to erase"
" a bad block at addr 0x%08x\n",
(unsigned int) addr);
instr->state = MTD_ERASE_FAILED;
goto erase_exit;
}
this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
onenand_invalidate_bufferram(mtd, addr, block_size);
ret = this->wait(mtd, FL_ERASING);
/* Check, if it is write protected */
if (ret) {
if (ret == -EPERM)
MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_erase: "
"Device is write protected!!!\n");
else
MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_erase: "
"Failed erase, block %d\n",
(unsigned)(addr >> this->erase_shift));
if (ret == -EPERM)
printk("onenand_erase: "
"Device is write protected!!!\n");
else
printk("onenand_erase: "
"Failed erase, block %d\n",
(unsigned)(addr >> this->erase_shift));
instr->state = MTD_ERASE_FAILED;
instr->fail_addr = addr;
goto erase_exit;
}
len -= block_size;
addr += block_size;
}
instr->state = MTD_ERASE_DONE;
erase_exit:
ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
/* Do call back function */
if (!ret)
mtd_erase_callback(instr);
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
return ret;
}
/**
* onenand_sync - [MTD Interface] sync
* @param mtd MTD device structure
*
* Sync is actually a wait for chip ready function
*/
void onenand_sync(struct mtd_info *mtd)
{
MTDDEBUG (MTD_DEBUG_LEVEL3, "onenand_sync: called\n");
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_SYNCING);
/* Release it and go back */
onenand_release_device(mtd);
}
/**
* onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
*
* Check whether the block is bad
*/
int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs)
{
int ret;
/* Check for invalid offset */
if (ofs > mtd->size)
return -EINVAL;
onenand_get_device(mtd, FL_READING);
ret = onenand_block_isbad_nolock(mtd,ofs, 0);
onenand_release_device(mtd);
return ret;
}
/**
* onenand_default_block_markbad - [DEFAULT] mark a block bad
* @param mtd MTD device structure
* @param ofs offset from device start
*
* This is the default implementation, which can be overridden by
* a hardware specific driver.
*/
static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
struct onenand_chip *this = mtd->priv;
struct bbm_info *bbm = this->bbm;
u_char buf[2] = {0, 0};
struct mtd_oob_ops ops = {
.mode = MTD_OOB_PLACE,
.ooblen = 2,
.oobbuf = buf,
.ooboffs = 0,
};
int block;
/* Get block number */
block = ((int) ofs) >> bbm->bbt_erase_shift;
if (bbm->bbt)
bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
/* We write two bytes, so we dont have to mess with 16 bit access */
ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
return onenand_write_oob_nolock(mtd, ofs, &ops);
}
/**
* onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
*
* Mark the block as bad
*/
int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
struct onenand_chip *this = mtd->priv;
int ret;
ret = onenand_block_isbad(mtd, ofs);
if (ret) {
/* If it was bad already, return success and do nothing */
if (ret > 0)
return 0;
return ret;
}
ret = this->block_markbad(mtd, ofs);
return ret;
}
/**
* onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s)
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
* @param len number of bytes to lock or unlock
* @param cmd lock or unlock command
*
* Lock or unlock one or more blocks
*/
static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd)
{
struct onenand_chip *this = mtd->priv;
int start, end, block, value, status;
int wp_status_mask;
start = ofs >> this->erase_shift;
end = len >> this->erase_shift;
if (cmd == ONENAND_CMD_LOCK)
wp_status_mask = ONENAND_WP_LS;
else
wp_status_mask = ONENAND_WP_US;
/* Continuous lock scheme */
if (this->options & ONENAND_HAS_CONT_LOCK) {
/* Set start block address */
this->write_word(start,
this->base + ONENAND_REG_START_BLOCK_ADDRESS);
/* Set end block address */
this->write_word(end - 1,
this->base + ONENAND_REG_END_BLOCK_ADDRESS);
/* Write unlock command */
this->command(mtd, cmd, 0, 0);
/* There's no return value */
this->wait(mtd, FL_UNLOCKING);
/* Sanity check */
while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
& ONENAND_CTRL_ONGO)
continue;
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
if (!(status & ONENAND_WP_US))
printk(KERN_ERR "wp status = 0x%x\n", status);
return 0;
}
/* Block lock scheme */
for (block = start; block < start + end; block++) {
/* Set block address */
value = onenand_block_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
/* Select DataRAM for DDP */
value = onenand_bufferram_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
/* Set start block address */
this->write_word(block,
this->base + ONENAND_REG_START_BLOCK_ADDRESS);
/* Write unlock command */
this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
/* There's no return value */
this->wait(mtd, FL_UNLOCKING);
/* Sanity check */
while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
& ONENAND_CTRL_ONGO)
continue;
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
if (!(status & ONENAND_WP_US))
printk(KERN_ERR "block = %d, wp status = 0x%x\n",
block, status);
}
return 0;
}
#ifdef ONENAND_LINUX
/**
* onenand_lock - [MTD Interface] Lock block(s)
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
* @param len number of bytes to unlock
*
* Lock one or more blocks
*/
static int onenand_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
{
int ret;
onenand_get_device(mtd, FL_LOCKING);
ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK);
onenand_release_device(mtd);
return ret;
}
/**
* onenand_unlock - [MTD Interface] Unlock block(s)
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
* @param len number of bytes to unlock
*
* Unlock one or more blocks
*/
static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
{
int ret;
onenand_get_device(mtd, FL_LOCKING);
ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
onenand_release_device(mtd);
return ret;
}
#endif
/**
* onenand_check_lock_status - [OneNAND Interface] Check lock status
* @param this onenand chip data structure
*
* Check lock status
*/
static int onenand_check_lock_status(struct onenand_chip *this)
{
unsigned int value, block, status;
unsigned int end;
end = this->chipsize >> this->erase_shift;
for (block = 0; block < end; block++) {
/* Set block address */
value = onenand_block_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
/* Select DataRAM for DDP */
value = onenand_bufferram_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
/* Set start block address */
this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
if (!(status & ONENAND_WP_US)) {
printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
return 0;
}
}
return 1;
}
/**
* onenand_unlock_all - [OneNAND Interface] unlock all blocks
* @param mtd MTD device structure
*
* Unlock all blocks
*/
static void onenand_unlock_all(struct mtd_info *mtd)
{
struct onenand_chip *this = mtd->priv;
loff_t ofs = 0;
size_t len = this->chipsize;
if (this->options & ONENAND_HAS_UNLOCK_ALL) {
/* Set start block address */
this->write_word(0, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
/* Write unlock command */
this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
/* There's no return value */
this->wait(mtd, FL_LOCKING);
/* Sanity check */
while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
& ONENAND_CTRL_ONGO)
continue;
return;
/* Check lock status */
if (onenand_check_lock_status(this))
return;
/* Workaround for all block unlock in DDP */
if (ONENAND_IS_DDP(this)) {
/* All blocks on another chip */
ofs = this->chipsize >> 1;
len = this->chipsize >> 1;
}
}
onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
}
/**
* onenand_check_features - Check and set OneNAND features
* @param mtd MTD data structure
*
* Check and set OneNAND features
* - lock scheme
* - two plane
*/
static void onenand_check_features(struct mtd_info *mtd)
{
struct onenand_chip *this = mtd->priv;
unsigned int density, process;
/* Lock scheme depends on density and process */
density = onenand_get_density(this->device_id);
process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT;
/* Lock scheme */
switch (density) {
case ONENAND_DEVICE_DENSITY_4Gb:
this->options |= ONENAND_HAS_2PLANE;
case ONENAND_DEVICE_DENSITY_2Gb:
/* 2Gb DDP don't have 2 plane */
if (!ONENAND_IS_DDP(this))
this->options |= ONENAND_HAS_2PLANE;
this->options |= ONENAND_HAS_UNLOCK_ALL;
case ONENAND_DEVICE_DENSITY_1Gb:
/* A-Die has all block unlock */
if (process)
this->options |= ONENAND_HAS_UNLOCK_ALL;
break;
default:
/* Some OneNAND has continuous lock scheme */
if (!process)
this->options |= ONENAND_HAS_CONT_LOCK;
break;
}
if (this->options & ONENAND_HAS_CONT_LOCK)
printk(KERN_DEBUG "Lock scheme is Continuous Lock\n");
if (this->options & ONENAND_HAS_UNLOCK_ALL)
printk(KERN_DEBUG "Chip support all block unlock\n");
if (this->options & ONENAND_HAS_2PLANE)
printk(KERN_DEBUG "Chip has 2 plane\n");
}
/**
* onenand_print_device_info - Print device ID
* @param device device ID
*
* Print device ID
*/
char *onenand_print_device_info(int device, int version)
{
int vcc, demuxed, ddp, density;
char *dev_info = malloc(80);
char *p = dev_info;
vcc = device & ONENAND_DEVICE_VCC_MASK;
demuxed = device & ONENAND_DEVICE_IS_DEMUX;
ddp = device & ONENAND_DEVICE_IS_DDP;
density = device >> ONENAND_DEVICE_DENSITY_SHIFT;
p += sprintf(dev_info, "%sOneNAND%s %dMB %sV 16-bit (0x%02x)",
demuxed ? "" : "Muxed ",
ddp ? "(DDP)" : "",
(16 << density), vcc ? "2.65/3.3" : "1.8", device);
sprintf(p, "\nOneNAND version = 0x%04x", version);
printk("%s\n", dev_info);
return dev_info;
}
static const struct onenand_manufacturers onenand_manuf_ids[] = {
{ONENAND_MFR_SAMSUNG, "Samsung"},
};
/**
* onenand_check_maf - Check manufacturer ID
* @param manuf manufacturer ID
*
* Check manufacturer ID
*/
static int onenand_check_maf(int manuf)
{
int size = ARRAY_SIZE(onenand_manuf_ids);
char *name;
int i;
for (i = 0; size; i++)
if (manuf == onenand_manuf_ids[i].id)
break;
if (i < size)
name = onenand_manuf_ids[i].name;
else
name = "Unknown";
#ifdef ONENAND_DEBUG
printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n", name, manuf);
#endif
return i == size;
}
/**
* onenand_probe - [OneNAND Interface] Probe the OneNAND device
* @param mtd MTD device structure
*
* OneNAND detection method:
* Compare the the values from command with ones from register
*/
static int onenand_probe(struct mtd_info *mtd)
{
struct onenand_chip *this = mtd->priv;
int bram_maf_id, bram_dev_id, maf_id, dev_id, ver_id;
int density;
int syscfg;
/* Save system configuration 1 */
syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
/* Clear Sync. Burst Read mode to read BootRAM */
this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ), this->base + ONENAND_REG_SYS_CFG1);
/* Send the command for reading device ID from BootRAM */
this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM);
/* Read manufacturer and device IDs from BootRAM */
bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0);
bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2);
/* Reset OneNAND to read default register values */
this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
/* Wait reset */
this->wait(mtd, FL_RESETING);
/* Restore system configuration 1 */
this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
/* Check manufacturer ID */
if (onenand_check_maf(bram_maf_id))
return -ENXIO;
/* Read manufacturer and device IDs from Register */
maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
/* Check OneNAND device */
if (maf_id != bram_maf_id || dev_id != bram_dev_id)
return -ENXIO;
/* FIXME : Current OneNAND MTD doesn't support Flex-OneNAND */
if (dev_id & (1 << 9)) {
printk("Not yet support Flex-OneNAND\n");
return -ENXIO;
}
/* Flash device information */
mtd->name = onenand_print_device_info(dev_id, ver_id);
this->device_id = dev_id;
this->version_id = ver_id;
density = onenand_get_density(dev_id);
this->chipsize = (16 << density) << 20;
/* Set density mask. it is used for DDP */
if (ONENAND_IS_DDP(this))
this->density_mask = (1 << (density + 6));
else
this->density_mask = 0;
/* OneNAND page size & block size */
/* The data buffer size is equal to page size */
mtd->writesize =
this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
mtd->oobsize = mtd->writesize >> 5;
/* Pagers per block is always 64 in OneNAND */
mtd->erasesize = mtd->writesize << 6;
this->erase_shift = ffs(mtd->erasesize) - 1;
this->page_shift = ffs(mtd->writesize) - 1;
this->ppb_shift = (this->erase_shift - this->page_shift);
this->page_mask = (mtd->erasesize / mtd->writesize) - 1;
/* It's real page size */
this->writesize = mtd->writesize;
/* REVIST: Multichip handling */
mtd->size = this->chipsize;
/* Check OneNAND features */
onenand_check_features(mtd);
mtd->flags = MTD_CAP_NANDFLASH;
mtd->erase = onenand_erase;
mtd->read = onenand_read;
mtd->write = onenand_write;
mtd->read_oob = onenand_read_oob;
mtd->write_oob = onenand_write_oob;
mtd->sync = onenand_sync;
mtd->block_isbad = onenand_block_isbad;
mtd->block_markbad = onenand_block_markbad;
return 0;
}
/**
* onenand_scan - [OneNAND Interface] Scan for the OneNAND device
* @param mtd MTD device structure
* @param maxchips Number of chips to scan for
*
* This fills out all the not initialized function pointers
* with the defaults.
* The flash ID is read and the mtd/chip structures are
* filled with the appropriate values.
*/
int onenand_scan(struct mtd_info *mtd, int maxchips)
{
int i;
struct onenand_chip *this = mtd->priv;
if (!this->read_word)
this->read_word = onenand_readw;
if (!this->write_word)
this->write_word = onenand_writew;
if (!this->command)
this->command = onenand_command;
if (!this->wait)
this->wait = onenand_wait;
if (!this->bbt_wait)
this->bbt_wait = onenand_bbt_wait;
if (!this->read_bufferram)
this->read_bufferram = onenand_read_bufferram;
if (!this->read_spareram)
this->read_spareram = onenand_read_bufferram;
if (!this->write_bufferram)
this->write_bufferram = onenand_write_bufferram;
if (!this->block_markbad)
this->block_markbad = onenand_default_block_markbad;
if (!this->scan_bbt)
this->scan_bbt = onenand_default_bbt;
if (onenand_probe(mtd))
return -ENXIO;
/* Set Sync. Burst Read after probing */
if (this->mmcontrol) {
printk(KERN_INFO "OneNAND Sync. Burst Read support\n");
this->read_bufferram = onenand_sync_read_bufferram;
}
/* Allocate buffers, if necessary */
if (!this->page_buf) {
this->page_buf = kzalloc(mtd->writesize, GFP_KERNEL);
if (!this->page_buf) {
printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n");
return -ENOMEM;
}
this->options |= ONENAND_PAGEBUF_ALLOC;
}
if (!this->oob_buf) {
this->oob_buf = kzalloc(mtd->oobsize, GFP_KERNEL);
if (!this->oob_buf) {
printk(KERN_ERR "onenand_scan: Can't allocate oob_buf\n");
if (this->options & ONENAND_PAGEBUF_ALLOC) {
this->options &= ~ONENAND_PAGEBUF_ALLOC;
kfree(this->page_buf);
}
return -ENOMEM;
}
this->options |= ONENAND_OOBBUF_ALLOC;
}
this->state = FL_READY;
/*
* Allow subpage writes up to oobsize.
*/
switch (mtd->oobsize) {
case 64:
this->ecclayout = &onenand_oob_64;
mtd->subpage_sft = 2;
break;
case 32:
this->ecclayout = &onenand_oob_32;
mtd->subpage_sft = 1;
break;
default:
printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n",
mtd->oobsize);
mtd->subpage_sft = 0;
/* To prevent kernel oops */
this->ecclayout = &onenand_oob_32;
break;
}
this->subpagesize = mtd->writesize >> mtd->subpage_sft;
/*
* The number of bytes available for a client to place data into
* the out of band area
*/
this->ecclayout->oobavail = 0;
for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES &&
this->ecclayout->oobfree[i].length; i++)
this->ecclayout->oobavail +=
this->ecclayout->oobfree[i].length;
mtd->oobavail = this->ecclayout->oobavail;
mtd->ecclayout = this->ecclayout;
/* Unlock whole block */
onenand_unlock_all(mtd);
return this->scan_bbt(mtd);
}
/**
* onenand_release - [OneNAND Interface] Free resources held by the OneNAND device
* @param mtd MTD device structure
*/
void onenand_release(struct mtd_info *mtd)
{
}