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mtd: kill MTD_NAND_VERIFY_WRITE

Browse Source 
Just as Artem suggested:

"Both UBI and JFFS2 are able to read verify what they wrote already.
There are also MTD tests which do this verification. So I think there
is no reason to keep this in the NAND layer, let alone wasting RAM in
the driver to support this feature. Besides, it does not work for sub-pages
and many drivers have it broken. It hurts more than it provides benefits."

So kill MTD_NAND_VERIFY_WRITE entirely.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Huang Shijie 2012-08-14 22:38:45 -04:00 committed by David Woodhouse
parent 8da28681eb
commit 657f28f881
26 changed files with 0 additions and 550 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/mtd/nand/Kconfig
View File

@ -22,15 +22,6 @@ menuconfig MTD_NAND
if MTD_NAND
config MTD_NAND_VERIFY_WRITE
bool "Verify NAND page writes"
help
This adds an extra check when data is written to the flash. The
NAND flash device internally checks only bits transitioning
from 1 to 0. There is a rare possibility that even though the
device thinks the write was successful, a bit could have been
flipped accidentally due to device wear or something else.
config MTD_NAND_BCH
tristate
select BCH

13
drivers/mtd/nand/ams-delta.c
View File

@ -103,18 +103,6 @@ static void ams_delta_read_buf(struct mtd_info *mtd, u_char *buf, int len)
buf[i] = ams_delta_read_byte(mtd);
}
static int ams_delta_verify_buf(struct mtd_info *mtd, const u_char *buf,
int len)
{
int i;
for (i=0; i<len; i++)
if (buf[i] != ams_delta_read_byte(mtd))
return -EFAULT;
return 0;
}
/*
* Command control function
*
@ -233,7 +221,6 @@ static int __devinit ams_delta_init(struct platform_device *pdev)
this->read_byte = ams_delta_read_byte;
this->write_buf = ams_delta_write_buf;
this->read_buf = ams_delta_read_buf;
this->verify_buf = ams_delta_verify_buf;
this->cmd_ctrl = ams_delta_hwcontrol;
if (gpio_request(AMS_DELTA_GPIO_PIN_NAND_RB, "nand_rdy") == 0) {
this->dev_ready = ams_delta_nand_ready;

46
drivers/mtd/nand/au1550nd.c
View File

@ -140,28 +140,6 @@ static void au_read_buf(struct mtd_info *mtd, u_char *buf, int len)
}
}
/**
* au_verify_buf - Verify chip data against buffer
* @mtd: MTD device structure
* @buf: buffer containing the data to compare
* @len: number of bytes to compare
*
* verify function for 8bit buswidth
*/
static int au_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
for (i = 0; i < len; i++) {
if (buf[i] != readb(this->IO_ADDR_R))
return -EFAULT;
au_sync();
}
return 0;
}
/**
* au_write_buf16 - write buffer to chip
* @mtd: MTD device structure
@ -205,29 +183,6 @@ static void au_read_buf16(struct mtd_info *mtd, u_char *buf, int len)
}
}
/**
* au_verify_buf16 - Verify chip data against buffer
* @mtd: MTD device structure
* @buf: buffer containing the data to compare
* @len: number of bytes to compare
*
* verify function for 16bit buswidth
*/
static int au_verify_buf16(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
u16 *p = (u16 *) buf;
len >>= 1;
for (i = 0; i < len; i++) {
if (p[i] != readw(this->IO_ADDR_R))
return -EFAULT;
au_sync();
}
return 0;
}
/* Select the chip by setting nCE to low */
#define NAND_CTL_SETNCE 1
/* Deselect the chip by setting nCE to high */
@ -516,7 +471,6 @@ static int __devinit au1550nd_probe(struct platform_device *pdev)
this->read_word = au_read_word;
this->write_buf = (pd->devwidth) ? au_write_buf16 : au_write_buf;
this->read_buf = (pd->devwidth) ? au_read_buf16 : au_read_buf;
this->verify_buf = (pd->devwidth) ? au_verify_buf16 : au_verify_buf;
ret = nand_scan(&ctx->info, 1);
if (ret) {

22
drivers/mtd/nand/bcm_umi_nand.c
View File

@ -332,27 +332,6 @@ static void bcm_umi_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len)
#endif
}
static uint8_t readbackbuf[NAND_MAX_PAGESIZE];
static int bcm_umi_nand_verify_buf(struct mtd_info *mtd, const u_char * buf,
int len)
{
/*
* Try to readback page with ECC correction. This is necessary
* for MLC parts which may have permanently stuck bits.
*/
struct nand_chip *chip = mtd->priv;
int ret = chip->ecc.read_page(mtd, chip, readbackbuf, 0, 0);
if (ret < 0)
return -EFAULT;
else {
if (memcmp(readbackbuf, buf, len) == 0)
return 0;
return -EFAULT;
}
return 0;
}
static int __devinit bcm_umi_nand_probe(struct platform_device *pdev)
{
struct nand_chip *this;
@ -416,7 +395,6 @@ static int __devinit bcm_umi_nand_probe(struct platform_device *pdev)
this->write_buf = bcm_umi_nand_write_buf;
this->read_buf = bcm_umi_nand_read_buf;
this->verify_buf = bcm_umi_nand_verify_buf;
this->cmd_ctrl = bcm_umi_nand_hwcontrol;
this->ecc.mode = NAND_ECC_HW;

7
drivers/mtd/nand/cafe_nand.c
View File

@ -576,13 +576,6 @@ static int cafe_nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
status = chip->waitfunc(mtd, chip);
}
#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
/* Send command to read back the data */
chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
if (chip->verify_buf(mtd, buf, mtd->writesize))
return -EIO;
#endif
return 0;
}

13
drivers/mtd/nand/cmx270_nand.c
View File

@ -76,18 +76,6 @@ static void cmx270_read_buf(struct mtd_info *mtd, u_char *buf, int len)
*buf++ = readl(this->IO_ADDR_R) >> 16;
}
static int cmx270_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
if (buf[i] != (u_char)(readl(this->IO_ADDR_R) >> 16))
return -EFAULT;
return 0;
}
static inline void nand_cs_on(void)
{
gpio_set_value(GPIO_NAND_CS, 0);
@ -209,7 +197,6 @@ static int __init cmx270_init(void)
this->read_byte = cmx270_read_byte;
this->read_buf = cmx270_read_buf;
this->write_buf = cmx270_write_buf;
this->verify_buf = cmx270_verify_buf;
/* Scan to find existence of the device */
if (nand_scan (cmx270_nand_mtd, 1)) {

63
drivers/mtd/nand/diskonchip.c
View File

@ -376,19 +376,6 @@ static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len)
}
}
static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len)
{
struct nand_chip *this = mtd->priv;
struct doc_priv *doc = this->priv;
void __iomem *docptr = doc->virtadr;
int i;
for (i = 0; i < len; i++)
if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO))
return -EFAULT;
return 0;
}
static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
{
struct nand_chip *this = mtd->priv;
@ -526,26 +513,6 @@ static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len)
buf[i] = ReadDOC(docptr, LastDataRead);
}
static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len)
{
struct nand_chip *this = mtd->priv;
struct doc_priv *doc = this->priv;
void __iomem *docptr = doc->virtadr;
int i;
/* Start read pipeline */
ReadDOC(docptr, ReadPipeInit);
for (i = 0; i < len - 1; i++)
if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
ReadDOC(docptr, LastDataRead);
return i;
}
if (buf[i] != ReadDOC(docptr, LastDataRead))
return i;
return 0;
}
static u_char doc2001plus_read_byte(struct mtd_info *mtd)
{
struct nand_chip *this = mtd->priv;
@ -610,33 +577,6 @@ static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len)
printk("\n");
}
static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len)
{
struct nand_chip *this = mtd->priv;
struct doc_priv *doc = this->priv;
void __iomem *docptr = doc->virtadr;
int i;
if (debug)
printk("verifybuf of %d bytes: ", len);
/* Start read pipeline */
ReadDOC(docptr, Mplus_ReadPipeInit);
ReadDOC(docptr, Mplus_ReadPipeInit);
for (i = 0; i < len - 2; i++)
if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
ReadDOC(docptr, Mplus_LastDataRead);
ReadDOC(docptr, Mplus_LastDataRead);
return i;
}
if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead))
return len - 2;
if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead))
return len - 1;
return 0;
}
static void doc2001plus_select_chip(struct mtd_info *mtd, int chip)
{
struct nand_chip *this = mtd->priv;
@ -1432,7 +1372,6 @@ static inline int __init doc2000_init(struct mtd_info *mtd)
this->read_byte = doc2000_read_byte;
this->write_buf = doc2000_writebuf;
this->read_buf = doc2000_readbuf;
this->verify_buf = doc2000_verifybuf;
this->scan_bbt = nftl_scan_bbt;
doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO;
@ -1449,7 +1388,6 @@ static inline int __init doc2001_init(struct mtd_info *mtd)
this->read_byte = doc2001_read_byte;
this->write_buf = doc2001_writebuf;
this->read_buf = doc2001_readbuf;
this->verify_buf = doc2001_verifybuf;
ReadDOC(doc->virtadr, ChipID);
ReadDOC(doc->virtadr, ChipID);
@ -1480,7 +1418,6 @@ static inline int __init doc2001plus_init(struct mtd_info *mtd)
this->read_byte = doc2001plus_read_byte;
this->write_buf = doc2001plus_writebuf;
this->read_buf = doc2001plus_readbuf;
this->verify_buf = doc2001plus_verifybuf;
this->scan_bbt = inftl_scan_bbt;
this->cmd_ctrl = NULL;
this->select_chip = doc2001plus_select_chip;

36
drivers/mtd/nand/fsl_elbc_nand.c
View File

@ -614,41 +614,6 @@ static void fsl_elbc_read_buf(struct mtd_info *mtd, u8 *buf, int len)
len, avail);
}
/*
* Verify buffer against the FCM Controller Data Buffer
*/
static int fsl_elbc_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
struct nand_chip *chip = mtd->priv;
struct fsl_elbc_mtd *priv = chip->priv;
struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
int i;
if (len < 0) {
dev_err(priv->dev, "write_buf of %d bytes", len);
return -EINVAL;
}
if ((unsigned int)len >
elbc_fcm_ctrl->read_bytes - elbc_fcm_ctrl->index) {
dev_err(priv->dev,
"verify_buf beyond end of buffer "
"(%d requested, %u available)\n",
len, elbc_fcm_ctrl->read_bytes - elbc_fcm_ctrl->index);
elbc_fcm_ctrl->index = elbc_fcm_ctrl->read_bytes;
return -EINVAL;
}
for (i = 0; i < len; i++)
if (in_8(&elbc_fcm_ctrl->addr[elbc_fcm_ctrl->index + i])
!= buf[i])
break;
elbc_fcm_ctrl->index += len;
return i == len && elbc_fcm_ctrl->status == LTESR_CC ? 0 : -EIO;
}
/* This function is called after Program and Erase Operations to
* check for success or failure.
*/
@ -798,7 +763,6 @@ static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
chip->read_byte = fsl_elbc_read_byte;
chip->write_buf = fsl_elbc_write_buf;
chip->read_buf = fsl_elbc_read_buf;
chip->verify_buf = fsl_elbc_verify_buf;
chip->select_chip = fsl_elbc_select_chip;
chip->cmdfunc = fsl_elbc_cmdfunc;
chip->waitfunc = fsl_elbc_wait;

41
drivers/mtd/nand/fsl_ifc_nand.c
View File

@ -626,46 +626,6 @@ static void fsl_ifc_read_buf(struct mtd_info *mtd, u8 *buf, int len)
__func__, len, avail);
}
/*
* Verify buffer against the IFC Controller Data Buffer
*/
static int fsl_ifc_verify_buf(struct mtd_info *mtd,
const u_char *buf, int len)
{
struct nand_chip *chip = mtd->priv;
struct fsl_ifc_mtd *priv = chip->priv;
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_nand_ctrl *nctrl = ifc_nand_ctrl;
int i;
if (len < 0) {
dev_err(priv->dev, "%s: write_buf of %d bytes", __func__, len);
return -EINVAL;
}
if ((unsigned int)len > nctrl->read_bytes - nctrl->index) {
dev_err(priv->dev,
"%s: beyond end of buffer (%d requested, %u available)\n",
__func__, len, nctrl->read_bytes - nctrl->index);
nctrl->index = nctrl->read_bytes;
return -EINVAL;
}
for (i = 0; i < len; i++)
if (in_8(&nctrl->addr[nctrl->index + i]) != buf[i])
break;
nctrl->index += len;
if (i != len)
return -EIO;
if (ctrl->nand_stat != IFC_NAND_EVTER_STAT_OPC)
return -EIO;
return 0;
}
/*
* This function is called after Program and Erase Operations to
* check for success or failure.
@ -796,7 +756,6 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
chip->write_buf = fsl_ifc_write_buf;
chip->read_buf = fsl_ifc_read_buf;
chip->verify_buf = fsl_ifc_verify_buf;
chip->select_chip = fsl_ifc_select_chip;
chip->cmdfunc = fsl_ifc_cmdfunc;
chip->waitfunc = fsl_ifc_wait;

39
drivers/mtd/nand/gpio.c
View File

@ -100,23 +100,6 @@ static void gpio_nand_readbuf(struct mtd_info *mtd, u_char *buf, int len)
readsb(this->IO_ADDR_R, buf, len);
}
static int gpio_nand_verifybuf(struct mtd_info *mtd, const u_char *buf, int len)
{
struct nand_chip *this = mtd->priv;
unsigned char read, *p = (unsigned char *) buf;
int i, err = 0;
for (i = 0; i < len; i++) {
read = readb(this->IO_ADDR_R);
if (read != p[i]) {
pr_debug("%s: err at %d (read %04x vs %04x)\n",
__func__, i, read, p[i]);
err = -EFAULT;
}
}
return err;
}
static void gpio_nand_writebuf16(struct mtd_info *mtd, const u_char *buf,
int len)
{
@ -148,26 +131,6 @@ static void gpio_nand_readbuf16(struct mtd_info *mtd, u_char *buf, int len)
}
}
static int gpio_nand_verifybuf16(struct mtd_info *mtd, const u_char *buf,
int len)
{
struct nand_chip *this = mtd->priv;
unsigned short read, *p = (unsigned short *) buf;
int i, err = 0;
len >>= 1;
for (i = 0; i < len; i++) {
read = readw(this->IO_ADDR_R);
if (read != p[i]) {
pr_debug("%s: err at %d (read %04x vs %04x)\n",
__func__, i, read, p[i]);
err = -EFAULT;
}
}
return err;
}
static int gpio_nand_devready(struct mtd_info *mtd)
{
struct gpiomtd *gpiomtd = gpio_nand_getpriv(mtd);
@ -391,11 +354,9 @@ static int __devinit gpio_nand_probe(struct platform_device *dev)
if (this->options & NAND_BUSWIDTH_16) {
this->read_buf = gpio_nand_readbuf16;
this->write_buf = gpio_nand_writebuf16;
this->verify_buf = gpio_nand_verifybuf16;
} else {
this->read_buf = gpio_nand_readbuf;
this->write_buf = gpio_nand_writebuf;
this->verify_buf = gpio_nand_verifybuf;
}
/* set the mtd private data for the nand driver */

19
drivers/mtd/nand/lpc32xx_slc.c
View File

@ -368,24 +368,6 @@ static void lpc32xx_nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int
writel((uint32_t)*buf++, SLC_DATA(host->io_base));
}
/*
* Verify data in buffer to data on device
*/
static int lpc32xx_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
{
struct nand_chip *chip = mtd->priv;
struct lpc32xx_nand_host *host = chip->priv;
int i;
/* DATA register must be read as 32 bits or it will fail */
for (i = 0; i < len; i++) {
if (buf[i] != (uint8_t)readl(SLC_DATA(host->io_base)))
return -EFAULT;
}
return 0;
}
/*
* Read the OOB data from the device without ECC using FIFO method
*/
@ -871,7 +853,6 @@ static int __devinit lpc32xx_nand_probe(struct platform_device *pdev)
chip->ecc.correct = nand_correct_data;
chip->ecc.strength = 1;
chip->ecc.hwctl = lpc32xx_nand_ecc_enable;
chip->verify_buf = lpc32xx_verify_buf;
/* bitflip_threshold's default is defined as ecc_strength anyway.
* Unfortunately, it is set only later at add_mtd_device(). Meanwhile

22
drivers/mtd/nand/mpc5121_nfc.c
View File

@ -506,27 +506,6 @@ static void mpc5121_nfc_write_buf(struct mtd_info *mtd,
mpc5121_nfc_buf_copy(mtd, (u_char *)buf, len, 1);
}
/* Compare buffer with NAND flash */
static int mpc5121_nfc_verify_buf(struct mtd_info *mtd,
const u_char *buf, int len)
{
u_char tmp[256];
uint bsize;
while (len) {
bsize = min(len, 256);
mpc5121_nfc_read_buf(mtd, tmp, bsize);
if (memcmp(buf, tmp, bsize))
return 1;
buf += bsize;
len -= bsize;
}
return 0;
}
/* Read byte from NFC buffers */
static u8 mpc5121_nfc_read_byte(struct mtd_info *mtd)
{
@ -732,7 +711,6 @@ static int __devinit mpc5121_nfc_probe(struct platform_device *op)
chip->read_word = mpc5121_nfc_read_word;
chip->read_buf = mpc5121_nfc_read_buf;
chip->write_buf = mpc5121_nfc_write_buf;
chip->verify_buf = mpc5121_nfc_verify_buf;
chip->select_chip = mpc5121_nfc_select_chip;
chip->bbt_options = NAND_BBT_USE_FLASH;
chip->ecc.mode = NAND_ECC_SOFT;

9
drivers/mtd/nand/mxc_nand.c
View File

@ -746,14 +746,6 @@ static void mxc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
host->buf_start += n;
}
/* Used by the upper layer to verify the data in NAND Flash
* with the data in the buf. */
static int mxc_nand_verify_buf(struct mtd_info *mtd,
const u_char *buf, int len)
{
return -EFAULT;
}
/* This function is used by upper layer for select and
* deselect of the NAND chip */
static void mxc_nand_select_chip_v1_v3(struct mtd_info *mtd, int chip)
@ -1406,7 +1398,6 @@ static int __init mxcnd_probe(struct platform_device *pdev)
this->read_word = mxc_nand_read_word;
this->write_buf = mxc_nand_write_buf;
this->read_buf = mxc_nand_read_buf;
this->verify_buf = mxc_nand_verify_buf;
host->clk = devm_clk_get(&pdev->dev, "nfc");
if (IS_ERR(host->clk))

53
drivers/mtd/nand/nand_base.c
View File

@ -242,25 +242,6 @@ static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
buf[i] = readb(chip->IO_ADDR_R);
}
/**
* nand_verify_buf - [DEFAULT] Verify chip data against buffer
* @mtd: MTD device structure
* @buf: buffer containing the data to compare
* @len: number of bytes to compare
*
* Default verify function for 8bit buswidth.
*/
static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
{
int i;
struct nand_chip *chip = mtd->priv;
for (i = 0; i < len; i++)
if (buf[i] != readb(chip->IO_ADDR_R))
return -EFAULT;
return 0;
}
/**
* nand_write_buf16 - [DEFAULT] write buffer to chip
* @mtd: MTD device structure
@ -300,28 +281,6 @@ static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len)
p[i] = readw(chip->IO_ADDR_R);
}
/**
* nand_verify_buf16 - [DEFAULT] Verify chip data against buffer
* @mtd: MTD device structure
* @buf: buffer containing the data to compare
* @len: number of bytes to compare
*
* Default verify function for 16bit buswidth.
*/
static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len)
{
int i;
struct nand_chip *chip = mtd->priv;
u16 *p = (u16 *) buf;
len >>= 1;
for (i = 0; i < len; i++)
if (p[i] != readw(chip->IO_ADDR_R))
return -EFAULT;
return 0;
}
/**
* nand_block_bad - [DEFAULT] Read bad block marker from the chip
* @mtd: MTD device structure
@ -2120,16 +2079,6 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
status = chip->waitfunc(mtd, chip);
}
#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
/* Send command to read back the data */
chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
if (chip->verify_buf(mtd, buf, mtd->writesize))
return -EIO;
/* Make sure the next page prog is preceded by a status read */
chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
#endif
return 0;
}
@ -2804,8 +2753,6 @@ static void nand_set_defaults(struct nand_chip *chip, int busw)
chip->write_buf = busw ? nand_write_buf16 : nand_write_buf;
if (!chip->read_buf)
chip->read_buf = busw ? nand_read_buf16 : nand_read_buf;
if (!chip->verify_buf)
chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf;
if (!chip->scan_bbt)
chip->scan_bbt = nand_default_bbt;

16
drivers/mtd/nand/nandsim.c
View File

@ -447,8 +447,6 @@ static unsigned int rptwear_cnt = 0;
/* MTD structure for NAND controller */
static struct mtd_info *nsmtd;
static u_char ns_verify_buf[NS_LARGEST_PAGE_SIZE];
/*
* Allocate array of page pointers, create slab allocation for an array
* and initialize the array by NULL pointers.
@ -2189,19 +2187,6 @@ static void ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
return;
}
static int ns_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
ns_nand_read_buf(mtd, (u_char *)&ns_verify_buf[0], len);
if (!memcmp(buf, &ns_verify_buf[0], len)) {
NS_DBG("verify_buf: the buffer is OK\n");
return 0;
} else {
NS_DBG("verify_buf: the buffer is wrong\n");
return -EFAULT;
}
}
/*
* Module initialization function
*/
@ -2236,7 +2221,6 @@ static int __init ns_init_module(void)
chip->dev_ready = ns_device_ready;
chip->write_buf = ns_nand_write_buf;
chip->read_buf = ns_nand_read_buf;
chip->verify_buf = ns_nand_verify_buf;
chip->read_word = ns_nand_read_word;
chip->ecc.mode = NAND_ECC_SOFT;
/* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */

13
drivers/mtd/nand/ndfc.c
View File

@ -140,18 +140,6 @@ static void ndfc_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
out_be32(ndfc->ndfcbase + NDFC_DATA, *p++);
}
static int ndfc_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
{
struct nand_chip *chip = mtd->priv;
struct ndfc_controller *ndfc = chip->priv;
uint32_t *p = (uint32_t *) buf;
for(;len > 0; len -= 4)
if (*p++ != in_be32(ndfc->ndfcbase + NDFC_DATA))
return -EFAULT;
return 0;
}
/*
* Initialize chip structure
*/
@ -172,7 +160,6 @@ static int ndfc_chip_init(struct ndfc_controller *ndfc,
chip->controller = &ndfc->ndfc_control;
chip->read_buf = ndfc_read_buf;
chip->write_buf = ndfc_write_buf;
chip->verify_buf = ndfc_verify_buf;
chip->ecc.correct = nand_correct_data;
chip->ecc.hwctl = ndfc_enable_hwecc;
chip->ecc.calculate = ndfc_calculate_ecc;

17
drivers/mtd/nand/nuc900_nand.c
View File

@ -112,22 +112,6 @@ static void nuc900_nand_write_buf(struct mtd_info *mtd,
write_data_reg(nand, buf[i]);
}
static int nuc900_verify_buf(struct mtd_info *mtd,
const unsigned char *buf, int len)
{
int i;
struct nuc900_nand *nand;
nand = container_of(mtd, struct nuc900_nand, mtd);
for (i = 0; i < len; i++) {
if (buf[i] != (unsigned char)read_data_reg(nand))
return -EFAULT;
}
return 0;
}
static int nuc900_check_rb(struct nuc900_nand *nand)
{
unsigned int val;
@ -292,7 +276,6 @@ static int __devinit nuc900_nand_probe(struct platform_device *pdev)
chip->read_byte = nuc900_nand_read_byte;
chip->write_buf = nuc900_nand_write_buf;
chip->read_buf = nuc900_nand_read_buf;
chip->verify_buf = nuc900_verify_buf;
chip->chip_delay = 50;
chip->options = 0;
chip->ecc.mode = NAND_ECC_SOFT;

23
drivers/mtd/nand/omap2.c
View File

@ -613,27 +613,6 @@ out_copy:
omap_write_buf8(mtd, buf, len);
}
/**
* omap_verify_buf - Verify chip data against buffer
* @mtd: MTD device structure
* @buf: buffer containing the data to compare
* @len: number of bytes to compare
*/
static int omap_verify_buf(struct mtd_info *mtd, const u_char * buf, int len)
{
struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
mtd);
u16 *p = (u16 *) buf;
len >>= 1;
while (len--) {
if (*p++ != cpu_to_le16(readw(info->nand.IO_ADDR_R)))
return -EFAULT;
}
return 0;
}
/**
* gen_true_ecc - This function will generate true ECC value
* @ecc_buf: buffer to store ecc code
@ -1285,8 +1264,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
goto out_release_mem_region;
}
info->nand.verify_buf = omap_verify_buf;
/* select the ecc type */
if (pdata->ecc_opt == OMAP_ECC_HAMMING_CODE_DEFAULT)
info->nand.ecc.mode = NAND_ECC_SOFT;

7
drivers/mtd/nand/pxa3xx_nand.c
View File

@ -771,12 +771,6 @@ static void pxa3xx_nand_write_buf(struct mtd_info *mtd,
info->buf_start += real_len;
}
static int pxa3xx_nand_verify_buf(struct mtd_info *mtd,
const uint8_t *buf, int len)
{
return 0;
}
static void pxa3xx_nand_select_chip(struct mtd_info *mtd, int chip)
{
return;
@ -1069,7 +1063,6 @@ static int alloc_nand_resource(struct platform_device *pdev)
chip->read_byte = pxa3xx_nand_read_byte;
chip->read_buf = pxa3xx_nand_read_buf;
chip->write_buf = pxa3xx_nand_write_buf;
chip->verify_buf = pxa3xx_nand_verify_buf;
}
spin_lock_init(&chip->controller->lock);

22
drivers/mtd/nand/r852.c
View File

@ -309,27 +309,6 @@ static uint8_t r852_read_byte(struct mtd_info *mtd)
return r852_read_reg(dev, R852_DATALINE);
}
/*
* Readback the buffer to verify it
*/
int r852_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
{
struct r852_device *dev = r852_get_dev(mtd);
/* We can't be sure about anything here... */
if (dev->card_unstable)
return -1;
/* This will never happen, unless you wired up a nand chip
with > 512 bytes page size to the reader */
if (len > SM_SECTOR_SIZE)
return 0;
r852_read_buf(mtd, dev->tmp_buffer, len);
return memcmp(buf, dev->tmp_buffer, len);
}
/*
* Control several chip lines & send commands
*/
@ -882,7 +861,6 @@ int r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
chip->read_byte = r852_read_byte;
chip->read_buf = r852_read_buf;
chip->write_buf = r852_write_buf;
chip->verify_buf = r852_verify_buf;
/* ecc */
chip->ecc.mode = NAND_ECC_HW_SYNDROME;

11
drivers/mtd/nand/sh_flctl.c
View File

@ -786,16 +786,6 @@ static void flctl_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
flctl->index += len;
}
static int flctl_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
for (i = 0; i < len; i++)
if (buf[i] != flctl_read_byte(mtd))
return -EFAULT;
return 0;
}
static int flctl_chip_init_tail(struct mtd_info *mtd)
{
struct sh_flctl *flctl = mtd_to_flctl(mtd);
@ -929,7 +919,6 @@ static int __devinit flctl_probe(struct platform_device *pdev)
nand->read_byte = flctl_read_byte;
nand->write_buf = flctl_write_buf;
nand->read_buf = flctl_read_buf;
nand->verify_buf = flctl_verify_buf;
nand->select_chip = flctl_select_chip;
nand->cmdfunc = flctl_cmdfunc;

19
drivers/mtd/nand/socrates_nand.c
View File

@ -98,24 +98,6 @@ static uint16_t socrates_nand_read_word(struct mtd_info *mtd)
return word;
}
/**
* socrates_nand_verify_buf - Verify chip data against buffer
* @mtd: MTD device structure
* @buf: buffer containing the data to compare
* @len: number of bytes to compare
*/
static int socrates_nand_verify_buf(struct mtd_info *mtd, const u8 *buf,
int len)
{
int i;
for (i = 0; i < len; i++) {
if (buf[i] != socrates_nand_read_byte(mtd))
return -EFAULT;
}
return 0;
}
/*
* Hardware specific access to control-lines
*/
@ -201,7 +183,6 @@ static int __devinit socrates_nand_probe(struct platform_device *ofdev)
nand_chip->read_word = socrates_nand_read_word;
nand_chip->write_buf = socrates_nand_write_buf;
nand_chip->read_buf = socrates_nand_read_buf;
nand_chip->verify_buf = socrates_nand_verify_buf;
nand_chip->dev_ready = socrates_nand_device_ready;
nand_chip->ecc.mode = NAND_ECC_SOFT; /* enable ECC */

13
drivers/mtd/nand/tmio_nand.c
View File

@ -256,18 +256,6 @@ static void tmio_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
tmio_ioread16_rep(tmio->fcr + FCR_DATA, buf, len >> 1);
}
static int
tmio_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
struct tmio_nand *tmio = mtd_to_tmio(mtd);
u16 *p = (u16 *) buf;
for (len >>= 1; len; len--)
if (*(p++) != tmio_ioread16(tmio->fcr + FCR_DATA))
return -EFAULT;
return 0;
}
static void tmio_nand_enable_hwecc(struct mtd_info *mtd, int mode)
{
struct tmio_nand *tmio = mtd_to_tmio(mtd);
@ -424,7 +412,6 @@ static int tmio_probe(struct platform_device *dev)
nand_chip->read_byte = tmio_nand_read_byte;
nand_chip->write_buf = tmio_nand_write_buf;
nand_chip->read_buf = tmio_nand_read_buf;
nand_chip->verify_buf = tmio_nand_verify_buf;
/* set eccmode using hardware ECC */
nand_chip->ecc.mode = NAND_ECC_HW;

13
drivers/mtd/nand/txx9ndfmc.c
View File

@ -131,18 +131,6 @@ static void txx9ndfmc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
*buf++ = __raw_readl(ndfdtr);
}
static int txx9ndfmc_verify_buf(struct mtd_info *mtd, const uint8_t *buf,
int len)
{
struct platform_device *dev = mtd_to_platdev(mtd);
void __iomem *ndfdtr = ndregaddr(dev, TXX9_NDFDTR);
while (len--)
if (*buf++ != (uint8_t)__raw_readl(ndfdtr))
return -EFAULT;
return 0;
}
static void txx9ndfmc_cmd_ctrl(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
@ -346,7 +334,6 @@ static int __init txx9ndfmc_probe(struct platform_device *dev)
chip->read_byte = txx9ndfmc_read_byte;
chip->read_buf = txx9ndfmc_read_buf;
chip->write_buf = txx9ndfmc_write_buf;
chip->verify_buf = txx9ndfmc_verify_buf;
chip->cmd_ctrl = txx9ndfmc_cmd_ctrl;
chip->dev_ready = txx9ndfmc_dev_ready;
chip->ecc.calculate = txx9ndfmc_calculate_ecc;

1
drivers/mtd/sm_ftl.c
View File

@ -346,7 +346,6 @@ static int sm_write_sector(struct sm_ftl *ftl,
ret = mtd_write_oob(mtd, sm_mkoffset(ftl, zone, block, boffset), &ops);
/* Now we assume that hardware will catch write bitflip errors */
/* If you are paranoid, use CONFIG_MTD_NAND_VERIFY_WRITE */
if (ret) {
dbg("write to block %d at zone %d, failed with error %d",

3
include/linux/mtd/nand.h
View File

@ -394,8 +394,6 @@ struct nand_buffers {
* @read_word: [REPLACEABLE] read one word from the chip
* @write_buf: [REPLACEABLE] write data from the buffer to the chip
* @read_buf: [REPLACEABLE] read data from the chip into the buffer
* @verify_buf: [REPLACEABLE] verify buffer contents against the chip
* data.
* @select_chip: [REPLACEABLE] select chip nr
* @block_bad: [REPLACEABLE] check, if the block is bad
* @block_markbad: [REPLACEABLE] mark the block bad
@ -478,7 +476,6 @@ struct nand_chip {
u16 (*read_word)(struct mtd_info *mtd);
void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
int (*verify_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
void (*select_chip)(struct mtd_info *mtd, int chip);
int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip);
int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);