* http://www.linux-mtd.infradead.org/tech/nand.html
*
* Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
- * 2002 Thomas Gleixner (tglx@linutronix.de)
+ * 2002-2006 Thomas Gleixner (tglx@linutronix.de)
*
- * 02-08-2004 tglx: support for strange chips, which cannot auto increment
- * pages on read / read_oob
- *
- * 03-17-2004 tglx: Check ready before auto increment check. Simon Bayes
- * pointed this out, as he marked an auto increment capable chip
- * as NOAUTOINCR in the board driver.
- * Make reads over block boundaries work too
- *
- * 04-14-2004 tglx: first working version for 2k page size chips
- *
- * 05-19-2004 tglx: Basic support for Renesas AG-AND chips
- *
- * 09-24-2004 tglx: add support for hardware controllers (e.g. ECC) shared
- * among multiple independend devices. Suggestions and initial
- * patch from Ben Dooks <ben-mtd@fluff.org>
- *
- * 12-05-2004 dmarlin: add workaround for Renesas AG-AND chips "disturb"
- * issue. Basically, any block not rewritten may lose data when
- * surrounding blocks are rewritten many times. JFFS2 ensures
- * this doesn't happen for blocks it uses, but the Bad Block
- * Table(s) may not be rewritten. To ensure they do not lose
- * data, force them to be rewritten when some of the surrounding
- * blocks are erased. Rather than tracking a specific nearby
- * block (which could itself go bad), use a page address 'mask' to
- * select several blocks in the same area, and rewrite the BBT
- * when any of them are erased.
- *
- * 01-03-2005 dmarlin: added support for the device recovery command sequence
- * for Renesas AG-AND chips. If there was a sudden loss of power
- * during an erase operation, a "device recovery" operation must
- * be performed when power is restored to ensure correct
- * operation.
- *
- * 01-20-2005 dmarlin: added support for optional hardware specific callback
- * routine to perform extra error status checks on erase and write
- * failures. This required adding a wrapper function for
- * nand_read_ecc.
- *
- * 08-20-2005 vwool: suspend/resume added
- *
- * Credits:
+ * Credits:
* David Woodhouse for adding multichip support
*
* Aleph One Ltd. and Toby Churchill Ltd. for supporting the
* rework for 2K page size chips
*
- * TODO:
+ * TODO:
* Enable cached programming for 2k page size chips
* Check, if mtd->ecctype should be set to MTD_ECC_HW
* if we have HW ecc support.
* The AG-AND chips have nice features for speed improvement,
* which are not supported yet. Read / program 4 pages in one go.
*
- * $Id: nand_base.c,v 1.150 2005/09/15 13:58:48 vwool Exp $
- *
* 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.
#endif
/* Define default oob placement schemes for large and small page devices */
-static struct nand_oobinfo nand_oob_8 = {
- .useecc = MTD_NANDECC_AUTOPLACE,
+static struct nand_ecclayout nand_oob_8 = {
.eccbytes = 3,
.eccpos = {0, 1, 2},
- .oobfree = {{3, 2}, {6, 2}}
+ .oobfree = {
+ {.offset = 3,
+ .length = 2},
+ {.offset = 6,
+ .length = 2}}
};
-static struct nand_oobinfo nand_oob_16 = {
- .useecc = MTD_NANDECC_AUTOPLACE,
+static struct nand_ecclayout nand_oob_16 = {
.eccbytes = 6,
.eccpos = {0, 1, 2, 3, 6, 7},
- .oobfree = {{8, 8}}
+ .oobfree = {
+ {.offset = 8,
+ . length = 8}}
};
-static struct nand_oobinfo nand_oob_64 = {
- .useecc = MTD_NANDECC_AUTOPLACE,
+static struct nand_ecclayout nand_oob_64 = {
.eccbytes = 24,
.eccpos = {
40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55,
56, 57, 58, 59, 60, 61, 62, 63},
- .oobfree = {{2, 38}}
+ .oobfree = {
+ {.offset = 2,
+ .length = 38}}
};
-/* This is used for padding purposes in nand_write_oob */
-static uint8_t ffchars[] = {
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
-};
+static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd,
+ int new_state);
+
+static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops);
/*
- * NAND low-level MTD interface functions
+ * For devices which display every fart in the system on a seperate LED. Is
+ * compiled away when LED support is disabled.
*/
-static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len);
-static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len);
-static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len);
-
-static int nand_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, uint8_t *buf);
-static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, uint8_t *buf);
-static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const uint8_t *buf);
-static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const uint8_t *buf);
-static int nand_erase(struct mtd_info *mtd, struct erase_info *instr);
-static void nand_sync(struct mtd_info *mtd);
-
-/* Some internal functions */
-static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this,
- int page, uint8_t * oob_buf,
- struct nand_oobinfo *oobsel, int mode);
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
-static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this,
- int page, int numpages, uint8_t *oob_buf,
- struct nand_oobinfo *oobsel, int chipnr,
- int oobmode);
-#else
-#define nand_verify_pages(...) (0)
-#endif
-
-static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd,
- int new_state);
+DEFINE_LED_TRIGGER(nand_led_trigger);
/**
* nand_release_device - [GENERIC] release chip
*/
static void nand_release_device(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
/* De-select the NAND device */
- this->select_chip(mtd, -1);
+ chip->select_chip(mtd, -1);
/* Release the controller and the chip */
- spin_lock(&this->controller->lock);
- this->controller->active = NULL;
- this->state = FL_READY;
- wake_up(&this->controller->wq);
- spin_unlock(&this->controller->lock);
+ spin_lock(&chip->controller->lock);
+ chip->controller->active = NULL;
+ chip->state = FL_READY;
+ wake_up(&chip->controller->wq);
+ spin_unlock(&chip->controller->lock);
}
/**
*/
static uint8_t nand_read_byte(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
- return readb(this->IO_ADDR_R);
+ struct nand_chip *chip = mtd->priv;
+ return readb(chip->IO_ADDR_R);
}
/**
*/
static uint8_t nand_read_byte16(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
- return (uint8_t) cpu_to_le16(readw(this->IO_ADDR_R));
+ struct nand_chip *chip = mtd->priv;
+ return (uint8_t) cpu_to_le16(readw(chip->IO_ADDR_R));
}
/**
*/
static u16 nand_read_word(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
- return readw(this->IO_ADDR_R);
+ struct nand_chip *chip = mtd->priv;
+ return readw(chip->IO_ADDR_R);
}
/**
*
* Default select function for 1 chip devices.
*/
-static void nand_select_chip(struct mtd_info *mtd, int chip)
+static void nand_select_chip(struct mtd_info *mtd, int chipnr)
{
- struct nand_chip *this = mtd->priv;
- switch (chip) {
+ struct nand_chip *chip = mtd->priv;
+
+ switch (chipnr) {
case -1:
- this->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
break;
case 0:
- this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
break;
default:
static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
{
int i;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
for (i = 0; i < len; i++)
- writeb(buf[i], this->IO_ADDR_W);
+ writeb(buf[i], chip->IO_ADDR_W);
}
/**
static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
{
int i;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
for (i = 0; i < len; i++)
- buf[i] = readb(this->IO_ADDR_R);
+ buf[i] = readb(chip->IO_ADDR_R);
}
/**
static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
{
int i;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
for (i = 0; i < len; i++)
- if (buf[i] != readb(this->IO_ADDR_R))
+ if (buf[i] != readb(chip->IO_ADDR_R))
return -EFAULT;
-
return 0;
}
static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len)
{
int i;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
u16 *p = (u16 *) buf;
len >>= 1;
for (i = 0; i < len; i++)
- writew(p[i], this->IO_ADDR_W);
+ writew(p[i], chip->IO_ADDR_W);
}
static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len)
{
int i;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
u16 *p = (u16 *) buf;
len >>= 1;
for (i = 0; i < len; i++)
- p[i] = readw(this->IO_ADDR_R);
+ p[i] = readw(chip->IO_ADDR_R);
}
/**
static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len)
{
int i;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
u16 *p = (u16 *) buf;
len >>= 1;
for (i = 0; i < len; i++)
- if (p[i] != readw(this->IO_ADDR_R))
+ if (p[i] != readw(chip->IO_ADDR_R))
return -EFAULT;
return 0;
static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
{
int page, chipnr, res = 0;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
u16 bad;
if (getchip) {
- page = (int)(ofs >> this->page_shift);
- chipnr = (int)(ofs >> this->chip_shift);
+ page = (int)(ofs >> chip->page_shift);
+ chipnr = (int)(ofs >> chip->chip_shift);
- /* Grab the lock and see if the device is available */
- nand_get_device(this, mtd, FL_READING);
+ nand_get_device(chip, mtd, FL_READING);
/* Select the NAND device */
- this->select_chip(mtd, chipnr);
+ chip->select_chip(mtd, chipnr);
} else
page = (int)ofs;
- if (this->options & NAND_BUSWIDTH_16) {
- this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE,
- page & this->pagemask);
- bad = cpu_to_le16(this->read_word(mtd));
- if (this->badblockpos & 0x1)
+ if (chip->options & NAND_BUSWIDTH_16) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE,
+ page & chip->pagemask);
+ bad = cpu_to_le16(chip->read_word(mtd));
+ if (chip->badblockpos & 0x1)
bad >>= 8;
if ((bad & 0xFF) != 0xff)
res = 1;
} else {
- this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos,
- page & this->pagemask);
- if (this->read_byte(mtd) != 0xff)
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos,
+ page & chip->pagemask);
+ if (chip->read_byte(mtd) != 0xff)
res = 1;
}
- if (getchip) {
- /* Deselect and wake up anyone waiting on the device */
+ if (getchip)
nand_release_device(mtd);
- }
return res;
}
*/
static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
uint8_t buf[2] = { 0, 0 };
- size_t retlen;
- int block;
+ int block, ret;
/* Get block number */
- block = ((int)ofs) >> this->bbt_erase_shift;
- if (this->bbt)
- this->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
+ block = ((int)ofs) >> chip->bbt_erase_shift;
+ if (chip->bbt)
+ chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
/* Do we have a flash based bad block table ? */
- if (this->options & NAND_USE_FLASH_BBT)
- return nand_update_bbt(mtd, ofs);
+ if (chip->options & NAND_USE_FLASH_BBT)
+ ret = nand_update_bbt(mtd, ofs);
+ else {
+ /* We write two bytes, so we dont have to mess with 16 bit
+ * access
+ */
+ ofs += mtd->oobsize;
+ chip->ops.len = 2;
+ chip->ops.datbuf = NULL;
+ chip->ops.oobbuf = buf;
+ chip->ops.ooboffs = chip->badblockpos & ~0x01;
- /* We write two bytes, so we dont have to mess with 16 bit access */
- ofs += mtd->oobsize + (this->badblockpos & ~0x01);
- return nand_write_oob(mtd, ofs, 2, &retlen, buf);
+ ret = nand_do_write_oob(mtd, ofs, &chip->ops);
+ }
+ if (!ret)
+ mtd->ecc_stats.badblocks++;
+ return ret;
}
/**
*/
static int nand_check_wp(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
/* Check the WP bit */
- this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
- return (this->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1;
+ chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
+ return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1;
}
/**
static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip,
int allowbbt)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
- if (!this->bbt)
- return this->block_bad(mtd, ofs, getchip);
+ if (!chip->bbt)
+ return chip->block_bad(mtd, ofs, getchip);
/* Return info from the table */
return nand_isbad_bbt(mtd, ofs, allowbbt);
}
-DEFINE_LED_TRIGGER(nand_led_trigger);
-
/*
* Wait for the ready pin, after a command
* The timeout is catched later.
*/
static void nand_wait_ready(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
unsigned long timeo = jiffies + 2;
led_trigger_event(nand_led_trigger, LED_FULL);
/* wait until command is processed or timeout occures */
do {
- if (this->dev_ready(mtd))
+ if (chip->dev_ready(mtd))
break;
touch_softlockup_watchdog();
} while (time_before(jiffies, timeo));
static void nand_command(struct mtd_info *mtd, unsigned int command,
int column, int page_addr)
{
- register struct nand_chip *this = mtd->priv;
+ register struct nand_chip *chip = mtd->priv;
int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE;
/*
column -= 256;
readcmd = NAND_CMD_READ1;
}
- this->cmd_ctrl(mtd, readcmd, ctrl);
+ chip->cmd_ctrl(mtd, readcmd, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
}
- this->cmd_ctrl(mtd, command, ctrl);
+ chip->cmd_ctrl(mtd, command, ctrl);
/*
* Address cycle, when necessary
/* Serially input address */
if (column != -1) {
/* Adjust columns for 16 bit buswidth */
- if (this->options & NAND_BUSWIDTH_16)
+ if (chip->options & NAND_BUSWIDTH_16)
column >>= 1;
- this->cmd_ctrl(mtd, column, ctrl);
+ chip->cmd_ctrl(mtd, column, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
}
if (page_addr != -1) {
- this->cmd_ctrl(mtd, page_addr, ctrl);
+ chip->cmd_ctrl(mtd, page_addr, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
- this->cmd_ctrl(mtd, page_addr >> 8, ctrl);
+ chip->cmd_ctrl(mtd, page_addr >> 8, ctrl);
/* One more address cycle for devices > 32MiB */
- if (this->chipsize > (32 << 20))
- this->cmd_ctrl(mtd, page_addr >> 16, ctrl);
+ if (chip->chipsize > (32 << 20))
+ chip->cmd_ctrl(mtd, page_addr >> 16, ctrl);
}
- this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
/*
* program and erase have their own busy handlers
case NAND_CMD_ERASE2:
case NAND_CMD_SEQIN:
case NAND_CMD_STATUS:
- this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
return;
case NAND_CMD_RESET:
- if (this->dev_ready)
+ if (chip->dev_ready)
break;
- udelay(this->chip_delay);
- this->cmd_ctrl(mtd, NAND_CMD_STATUS,
+ udelay(chip->chip_delay);
+ chip->cmd_ctrl(mtd, NAND_CMD_STATUS,
NAND_CTRL_CLE | NAND_CTRL_CHANGE);
- this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
- while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ;
+ chip->cmd_ctrl(mtd,
+ NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
+ while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
return;
/* This applies to read commands */
* If we don't have access to the busy pin, we apply the given
* command delay
*/
- if (!this->dev_ready) {
- udelay(this->chip_delay);
+ if (!chip->dev_ready) {
+ udelay(chip->chip_delay);
return;
}
}
static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
int column, int page_addr)
{
- register struct nand_chip *this = mtd->priv;
+ register struct nand_chip *chip = mtd->priv;
/* Emulate NAND_CMD_READOOB */
if (command == NAND_CMD_READOOB) {
}
/* Command latch cycle */
- this->cmd_ctrl(mtd, command & 0xff,
+ chip->cmd_ctrl(mtd, command & 0xff,
NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
if (column != -1 || page_addr != -1) {
/* Serially input address */
if (column != -1) {
/* Adjust columns for 16 bit buswidth */
- if (this->options & NAND_BUSWIDTH_16)
+ if (chip->options & NAND_BUSWIDTH_16)
column >>= 1;
- this->cmd_ctrl(mtd, column, ctrl);
+ chip->cmd_ctrl(mtd, column, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
- this->cmd_ctrl(mtd, column >> 8, ctrl);
+ chip->cmd_ctrl(mtd, column >> 8, ctrl);
}
if (page_addr != -1) {
- this->cmd_ctrl(mtd, page_addr, ctrl);
- this->cmd_ctrl(mtd, page_addr >> 8,
+ chip->cmd_ctrl(mtd, page_addr, ctrl);
+ chip->cmd_ctrl(mtd, page_addr >> 8,
NAND_NCE | NAND_ALE);
/* One more address cycle for devices > 128MiB */
- if (this->chipsize > (128 << 20))
- this->cmd_ctrl(mtd, page_addr >> 16,
+ if (chip->chipsize > (128 << 20))
+ chip->cmd_ctrl(mtd, page_addr >> 16,
NAND_NCE | NAND_ALE);
}
}
- this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
/*
* program and erase have their own busy handlers
case NAND_CMD_STATUS_ERROR1:
case NAND_CMD_STATUS_ERROR2:
case NAND_CMD_STATUS_ERROR3:
- udelay(this->chip_delay);
+ udelay(chip->chip_delay);
return;
case NAND_CMD_RESET:
- if (this->dev_ready)
+ if (chip->dev_ready)
break;
- udelay(this->chip_delay);
- this->cmd_ctrl(mtd, NAND_CMD_STATUS, NAND_NCE | NAND_CLE);
- this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
- while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ;
+ udelay(chip->chip_delay);
+ chip->cmd_ctrl(mtd, NAND_CMD_STATUS,
+ NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE,
+ NAND_NCE | NAND_CTRL_CHANGE);
+ while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
return;
case NAND_CMD_READ0:
- this->cmd_ctrl(mtd, NAND_CMD_READSTART, NAND_NCE | NAND_CLE);
- this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
+ chip->cmd_ctrl(mtd, NAND_CMD_READSTART,
+ NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE,
+ NAND_NCE | NAND_CTRL_CHANGE);
/* This applies to read commands */
default:
* If we don't have access to the busy pin, we apply the given
* command delay
*/
- if (!this->dev_ready) {
- udelay(this->chip_delay);
+ if (!chip->dev_ready) {
+ udelay(chip->chip_delay);
return;
}
}
* Get the device and lock it for exclusive access
*/
static int
-nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state)
+nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
{
- spinlock_t *lock = &this->controller->lock;
- wait_queue_head_t *wq = &this->controller->wq;
+ spinlock_t *lock = &chip->controller->lock;
+ wait_queue_head_t *wq = &chip->controller->wq;
DECLARE_WAITQUEUE(wait, current);
retry:
spin_lock(lock);
/* Hardware controller shared among independend devices */
/* Hardware controller shared among independend devices */
- if (!this->controller->active)
- this->controller->active = this;
+ if (!chip->controller->active)
+ chip->controller->active = chip;
- if (this->controller->active == this && this->state == FL_READY) {
- this->state = new_state;
+ if (chip->controller->active == chip && chip->state == FL_READY) {
+ chip->state = new_state;
spin_unlock(lock);
return 0;
}
if (new_state == FL_PM_SUSPENDED) {
spin_unlock(lock);
- return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
+ return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
}
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(wq, &wait);
* general NAND and SmartMedia specs
*
*/
-static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
+static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip, int state)
{
unsigned long timeo = jiffies;
* any case on any machine. */
ndelay(100);
- if ((state == FL_ERASING) && (this->options & NAND_IS_AND))
- this->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1);
+ if ((state == FL_ERASING) && (chip->options & NAND_IS_AND))
+ chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1);
else
- this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
+ chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
while (time_before(jiffies, timeo)) {
/* Check, if we were interrupted */
- if (this->state != state)
+ if (chip->state != state)
return 0;
- if (this->dev_ready) {
- if (this->dev_ready(mtd))
+ if (chip->dev_ready) {
+ if (chip->dev_ready(mtd))
break;
} else {
- if (this->read_byte(mtd) & NAND_STATUS_READY)
+ if (chip->read_byte(mtd) & NAND_STATUS_READY)
break;
}
cond_resched();
}
led_trigger_event(nand_led_trigger, LED_OFF);
- status = (int)this->read_byte(mtd);
+ status = (int)chip->read_byte(mtd);
return status;
}
/**
- * nand_write_page - [GENERIC] write one page
- * @mtd: MTD device structure
- * @this: NAND chip structure
- * @page: startpage inside the chip, must be called with (page & this->pagemask)
- * @oob_buf: out of band data buffer
- * @oobsel: out of band selecttion structre
- * @cached: 1 = enable cached programming if supported by chip
- *
- * Nand_page_program function is used for write and writev !
- * This function will always program a full page of data
- * If you call it with a non page aligned buffer, you're lost :)
- *
- * Cached programming is not supported yet.
+ * nand_read_page_raw - [Intern] read raw page data without ecc
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
*/
-static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page,
- uint8_t *oob_buf, struct nand_oobinfo *oobsel, int cached)
+static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
{
- int i, status;
- uint8_t ecc_code[32];
- int eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE;
- int *oob_config = oobsel->eccpos;
- int datidx = 0, eccidx = 0, eccsteps = this->ecc.steps;
- int eccbytes = 0;
-
- /* FIXME: Enable cached programming */
- cached = 0;
-
- /* Send command to begin auto page programming */
- this->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
+ chip->read_buf(mtd, buf, mtd->writesize);
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ return 0;
+}
- /* Write out complete page of data, take care of eccmode */
- switch (eccmode) {
- /* No ecc, write all */
- case NAND_ECC_NONE:
- printk(KERN_WARNING "Writing data without ECC to NAND-FLASH is not recommended\n");
- this->write_buf(mtd, this->data_poi, mtd->writesize);
- break;
+/**
+ * nand_read_page_swecc - {REPLACABLE] software ecc based page read function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
+ */
+static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *p = buf;
+ uint8_t *ecc_calc = chip->buffers.ecccalc;
+ uint8_t *ecc_code = chip->buffers.ecccode;
+ int *eccpos = chip->ecc.layout->eccpos;
- /* Software ecc 3/256, write all */
- case NAND_ECC_SOFT:
- for (; eccsteps; eccsteps--) {
- this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code);
- for (i = 0; i < 3; i++, eccidx++)
- oob_buf[oob_config[eccidx]] = ecc_code[i];
- datidx += this->ecc.size;
- }
- this->write_buf(mtd, this->data_poi, mtd->writesize);
- break;
- default:
- eccbytes = this->ecc.bytes;
- for (; eccsteps; eccsteps--) {
- /* enable hardware ecc logic for write */
- this->ecc.hwctl(mtd, NAND_ECC_WRITE);
- this->write_buf(mtd, &this->data_poi[datidx], this->ecc.size);
- this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code);
- for (i = 0; i < eccbytes; i++, eccidx++)
- oob_buf[oob_config[eccidx]] = ecc_code[i];
- /* If the hardware ecc provides syndromes then
- * the ecc code must be written immidiately after
- * the data bytes (words) */
- if (this->options & NAND_HWECC_SYNDROME)
- this->write_buf(mtd, ecc_code, eccbytes);
- datidx += this->ecc.size;
- }
- break;
- }
+ nand_read_page_raw(mtd, chip, buf);
- /* Write out OOB data */
- if (this->options & NAND_HWECC_SYNDROME)
- this->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes);
- else
- this->write_buf(mtd, oob_buf, mtd->oobsize);
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
- /* Send command to actually program the data */
- this->cmdfunc(mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1);
+ for (i = 0; i < chip->ecc.total; i++)
+ ecc_code[i] = chip->oob_poi[eccpos[i]];
- if (!cached) {
- /* call wait ready function */
- status = this->waitfunc(mtd, this, FL_WRITING);
+ eccsteps = chip->ecc.steps;
+ p = buf;
- /* See if operation failed and additional status checks are available */
- if ((status & NAND_STATUS_FAIL) && (this->errstat)) {
- status = this->errstat(mtd, this, FL_WRITING, status, page);
- }
+ for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ int stat;
- /* See if device thinks it succeeded */
- if (status & NAND_STATUS_FAIL) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write, page 0x%08x, ", __FUNCTION__, page);
- return -EIO;
- }
- } else {
- /* FIXME: Implement cached programming ! */
- /* wait until cache is ready */
- // status = this->waitfunc (mtd, this, FL_CACHEDRPG);
+ stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
+ if (stat == -1)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
}
return 0;
}
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
/**
- * nand_verify_pages - [GENERIC] verify the chip contents after a write
- * @mtd: MTD device structure
- * @this: NAND chip structure
- * @page: startpage inside the chip, must be called with (page & this->pagemask)
- * @numpages: number of pages to verify
- * @oob_buf: out of band data buffer
- * @oobsel: out of band selecttion structre
- * @chipnr: number of the current chip
- * @oobmode: 1 = full buffer verify, 0 = ecc only
+ * nand_read_page_hwecc - {REPLACABLE] hardware ecc based page read function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
*
- * The NAND device assumes that it is always writing to a cleanly erased page.
- * Hence, it performs its internal write verification only on bits that
- * transitioned from 1 to 0. The device does NOT verify the whole page on a
- * byte by byte basis. It is possible that the page was not completely erased
- * or the page is becoming unusable due to wear. The read with ECC would catch
- * the error later when the ECC page check fails, but we would rather catch
- * it early in the page write stage. Better to write no data than invalid data.
+ * Not for syndrome calculating ecc controllers which need a special oob layout
*/
-static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages,
- uint8_t *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode)
+static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
{
- int i, j, datidx = 0, oobofs = 0, res = -EIO;
- int eccsteps = this->eccsteps;
- int hweccbytes;
- uint8_t oobdata[64];
-
- hweccbytes = (this->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0;
-
- /* Send command to read back the first page */
- this->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
-
- for (;;) {
- for (j = 0; j < eccsteps; j++) {
- /* Loop through and verify the data */
- if (this->verify_buf(mtd, &this->data_poi[datidx], mtd->eccsize)) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
- goto out;
- }
- datidx += mtd->eccsize;
- /* Have we a hw generator layout ? */
- if (!hweccbytes)
- continue;
- if (this->verify_buf(mtd, &this->oob_buf[oobofs], hweccbytes)) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
- goto out;
- }
- oobofs += hweccbytes;
- }
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *p = buf;
+ uint8_t *ecc_calc = chip->buffers.ecccalc;
+ uint8_t *ecc_code = chip->buffers.ecccode;
+ int *eccpos = chip->ecc.layout->eccpos;
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ chip->ecc.hwctl(mtd, NAND_ECC_READ);
+ chip->read_buf(mtd, p, eccsize);
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
+ }
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
- /* check, if we must compare all data or if we just have to
- * compare the ecc bytes
- */
- if (oobmode) {
- if (this->verify_buf(mtd, &oob_buf[oobofs], mtd->oobsize - hweccbytes * eccsteps)) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
- goto out;
- }
- } else {
- /* Read always, else autoincrement fails */
- this->read_buf(mtd, oobdata, mtd->oobsize - hweccbytes * eccsteps);
-
- if (oobsel->useecc != MTD_NANDECC_OFF && !hweccbytes) {
- int ecccnt = oobsel->eccbytes;
-
- for (i = 0; i < ecccnt; i++) {
- int idx = oobsel->eccpos[i];
- if (oobdata[idx] != oob_buf[oobofs + idx]) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: Failed ECC write verify, page 0x%08x, %6i bytes were succesful\n",
- __FUNCTION__, page, i);
- goto out;
- }
- }
- }
- }
- oobofs += mtd->oobsize - hweccbytes * eccsteps;
- page++;
- numpages--;
-
- /* Apply delay or wait for ready/busy pin
- * Do this before the AUTOINCR check, so no problems
- * arise if a chip which does auto increment
- * is marked as NOAUTOINCR by the board driver.
- * Do this also before returning, so the chip is
- * ready for the next command.
- */
- if (!this->dev_ready)
- udelay(this->chip_delay);
- else
- nand_wait_ready(mtd);
+ for (i = 0; i < chip->ecc.total; i++)
+ ecc_code[i] = chip->oob_poi[eccpos[i]];
- /* All done, return happy */
- if (!numpages)
- return 0;
+ eccsteps = chip->ecc.steps;
+ p = buf;
+
+ for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ int stat;
- /* Check, if the chip supports auto page increment */
- if (!NAND_CANAUTOINCR(this))
- this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
+ stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
+ if (stat == -1)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
}
- /*
- * Terminate the read command. We come here in case of an error
- * So we must issue a reset command.
- */
- out:
- this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
- return res;
+ return 0;
}
-#endif
/**
- * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc
- * @mtd: MTD device structure
- * @from: offset to read from
- * @len: number of bytes to read
- * @retlen: pointer to variable to store the number of read bytes
- * @buf: the databuffer to put data
+ * nand_read_page_syndrome - {REPLACABLE] hardware ecc syndrom based page read
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
*
- * This function simply calls nand_do_read_ecc with oob buffer and oobsel = NULL
- * and flags = 0xff
+ * The hw generator calculates the error syndrome automatically. Therefor
+ * we need a special oob layout and handling.
*/
-static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf)
+static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
{
- return nand_do_read_ecc(mtd, from, len, retlen, buf, NULL, &mtd->oobinfo, 0xff);
-}
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *p = buf;
+ uint8_t *oob = chip->oob_poi;
-/**
- * nand_do_read_ecc - [MTD Interface] Read data with ECC
- * @mtd: MTD device structure
- * @from: offset to read from
- * @len: number of bytes to read
- * @retlen: pointer to variable to store the number of read bytes
- * @buf: the databuffer to put data
- * @oob_buf: filesystem supplied oob data buffer (can be NULL)
- * @oobsel: oob selection structure
- * @flags: flag to indicate if nand_get_device/nand_release_device should be preformed
- * and how many corrected error bits are acceptable:
- * bits 0..7 - number of tolerable errors
- * bit 8 - 0 == do not get/release chip, 1 == get/release chip
- *
- * NAND read with ECC
- */
-int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, uint8_t *buf, uint8_t *oob_buf, struct nand_oobinfo *oobsel, int flags)
-{
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ int stat;
- int i, j, col, realpage, page, end, ecc, chipnr, sndcmd = 1;
- int read = 0, oob = 0, ecc_status = 0, ecc_failed = 0;
- struct nand_chip *this = mtd->priv;
- uint8_t *data_poi, *oob_data = oob_buf;
- uint8_t ecc_calc[32];
- uint8_t ecc_code[32];
- int eccmode, eccsteps;
- int *oob_config, datidx;
- int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
- int eccbytes;
- int compareecc = 1;
- int oobreadlen;
-
- DEBUG(MTD_DEBUG_LEVEL3, "nand_read_ecc: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len);
+ chip->ecc.hwctl(mtd, NAND_ECC_READ);
+ chip->read_buf(mtd, p, eccsize);
- /* Do not allow reads past end of device */
- if ((from + len) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: Attempt read beyond end of device\n");
- *retlen = 0;
- return -EINVAL;
- }
+ if (chip->ecc.prepad) {
+ chip->read_buf(mtd, oob, chip->ecc.prepad);
+ oob += chip->ecc.prepad;
+ }
- /* Grab the lock and see if the device is available */
- if (flags & NAND_GET_DEVICE)
- nand_get_device(this, mtd, FL_READING);
+ chip->ecc.hwctl(mtd, NAND_ECC_READSYN);
+ chip->read_buf(mtd, oob, eccbytes);
+ stat = chip->ecc.correct(mtd, p, oob, NULL);
- /* Autoplace of oob data ? Use the default placement scheme */
- if (oobsel->useecc == MTD_NANDECC_AUTOPLACE)
- oobsel = this->autooob;
+ if (stat == -1)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
- eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE;
- oob_config = oobsel->eccpos;
+ oob += eccbytes;
- /* Select the NAND device */
- chipnr = (int)(from >> this->chip_shift);
- this->select_chip(mtd, chipnr);
+ if (chip->ecc.postpad) {
+ chip->read_buf(mtd, oob, chip->ecc.postpad);
+ oob += chip->ecc.postpad;
+ }
+ }
- /* First we calculate the starting page */
- realpage = (int)(from >> this->page_shift);
- page = realpage & this->pagemask;
+ /* Calculate remaining oob bytes */
+ i = oob - chip->oob_poi;
+ if (i)
+ chip->read_buf(mtd, oob, i);
- /* Get raw starting column */
- col = from & (mtd->writesize - 1);
+ return 0;
+}
- end = mtd->writesize;
- ecc = this->ecc.size;
- eccbytes = this->ecc.bytes;
+/**
+ * nand_transfer_oob - [Internal] Transfer oob to client buffer
+ * @chip: nand chip structure
+ * @ops: oob ops structure
+ */
+static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob,
+ struct mtd_oob_ops *ops)
+{
+ size_t len = ops->ooblen;
- if ((eccmode == NAND_ECC_NONE) || (this->options & NAND_HWECC_SYNDROME))
- compareecc = 0;
+ switch(ops->mode) {
- oobreadlen = mtd->oobsize;
- if (this->options & NAND_HWECC_SYNDROME)
- oobreadlen -= oobsel->eccbytes;
+ case MTD_OOB_PLACE:
+ case MTD_OOB_RAW:
+ memcpy(oob, chip->oob_poi + ops->ooboffs, len);
+ return oob + len;
- /* Loop until all data read */
- while (read < len) {
+ case MTD_OOB_AUTO: {
+ struct nand_oobfree *free = chip->ecc.layout->oobfree;
+ size_t bytes;
- int aligned = (!col && (len - read) >= end);
- /*
- * If the read is not page aligned, we have to read into data buffer
- * due to ecc, else we read into return buffer direct
- */
- if (aligned)
- data_poi = &buf[read];
- else
- data_poi = this->data_buf;
+ for(; free->length && len; free++, len -= bytes) {
+ bytes = min(len, free->length);
- /* Check, if we have this page in the buffer
- *
- * FIXME: Make it work when we must provide oob data too,
- * check the usage of data_buf oob field
- */
- if (realpage == this->pagebuf && !oob_buf) {
- /* aligned read ? */
- if (aligned)
- memcpy(data_poi, this->data_buf, end);
- goto readdata;
+ memcpy(oob, chip->oob_poi + free->offset, bytes);
+ oob += bytes;
}
+ return oob;
+ }
+ default:
+ BUG();
+ }
+ return NULL;
+}
- /* Check, if we must send the read command */
- if (sndcmd) {
- this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
- sndcmd = 0;
- }
+/**
+ * nand_do_read_ops - [Internal] Read data with ECC
+ *
+ * @mtd: MTD device structure
+ * @from: offset to read from
+ *
+ * Internal function. Called with chip held.
+ */
+static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
+{
+ int chipnr, page, realpage, col, bytes, aligned;
+ struct nand_chip *chip = mtd->priv;
+ struct mtd_ecc_stats stats;
+ int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
+ int sndcmd = 1;
+ int ret = 0;
+ uint32_t readlen = ops->len;
+ uint8_t *bufpoi, *oob, *buf;
- /* get oob area, if we have no oob buffer from fs-driver */
- if (!oob_buf || oobsel->useecc == MTD_NANDECC_AUTOPLACE ||
- oobsel->useecc == MTD_NANDECC_AUTOPL_USR)
- oob_data = &this->data_buf[end];
-
- eccsteps = this->ecc.steps;
-
- switch (eccmode) {
- case NAND_ECC_NONE:{
- /* No ECC, Read in a page */
- static unsigned long lastwhinge = 0;
- if ((lastwhinge / HZ) != (jiffies / HZ)) {
- printk(KERN_WARNING
- "Reading data from NAND FLASH without ECC is not recommended\n");
- lastwhinge = jiffies;
- }
- this->read_buf(mtd, data_poi, end);
- break;
- }
+ stats = mtd->ecc_stats;
- case NAND_ECC_SOFT: /* Software ECC 3/256: Read in a page + oob data */
- this->read_buf(mtd, data_poi, end);
- for (i = 0, datidx = 0; eccsteps; eccsteps--, i += 3, datidx += ecc)
- this->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]);
- break;
+ chipnr = (int)(from >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
- default:
- for (i = 0, datidx = 0; eccsteps; eccsteps--, i += eccbytes, datidx += ecc) {
- this->ecc.hwctl(mtd, NAND_ECC_READ);
- this->read_buf(mtd, &data_poi[datidx], ecc);
-
- /* HW ecc with syndrome calculation must read the
- * syndrome from flash immidiately after the data */
- if (!compareecc) {
- /* Some hw ecc generators need to know when the
- * syndrome is read from flash */
- this->ecc.hwctl(mtd, NAND_ECC_READSYN);
- this->read_buf(mtd, &oob_data[i], eccbytes);
- /* We calc error correction directly, it checks the hw
- * generator for an error, reads back the syndrome and
- * does the error correction on the fly */
- ecc_status = this->ecc.correct(mtd, &data_poi[datidx], &oob_data[i], &ecc_code[i]);
- if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: "
- "Failed ECC read, page 0x%08x on chip %d\n", page, chipnr);
- ecc_failed++;
- }
- } else {
- this->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]);
- }
- }
- break;
- }
+ realpage = (int)(from >> chip->page_shift);
+ page = realpage & chip->pagemask;
- /* read oobdata */
- this->read_buf(mtd, &oob_data[mtd->oobsize - oobreadlen], oobreadlen);
+ col = (int)(from & (mtd->writesize - 1));
+ chip->oob_poi = chip->buffers.oobrbuf;
- /* Skip ECC check, if not requested (ECC_NONE or HW_ECC with syndromes) */
- if (!compareecc)
- goto readoob;
+ buf = ops->datbuf;
+ oob = ops->oobbuf;
- /* Pick the ECC bytes out of the oob data */
- for (j = 0; j < oobsel->eccbytes; j++)
- ecc_code[j] = oob_data[oob_config[j]];
+ while(1) {
+ bytes = min(mtd->writesize - col, readlen);
+ aligned = (bytes == mtd->writesize);
- /* correct data, if necessary */
- for (i = 0, j = 0, datidx = 0; i < this->ecc.steps; i++, datidx += ecc) {
- ecc_status = this->ecc.correct(mtd, &data_poi[datidx], &ecc_code[j], &ecc_calc[j]);
+ /* Is the current page in the buffer ? */
+ if (realpage != chip->pagebuf || oob) {
+ bufpoi = aligned ? buf : chip->buffers.databuf;
- /* Get next chunk of ecc bytes */
- j += eccbytes;
+ if (likely(sndcmd)) {
+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
+ sndcmd = 0;
+ }
- /* Check, if we have a fs supplied oob-buffer,
- * This is the legacy mode. Used by YAFFS1
- * Should go away some day
- */
- if (oob_buf && oobsel->useecc == MTD_NANDECC_PLACE) {
- int *p = (int *)(&oob_data[mtd->oobsize]);
- p[i] = ecc_status;
+ /* Now read the page into the buffer */
+ ret = chip->ecc.read_page(mtd, chip, bufpoi);
+ if (ret < 0)
+ break;
+
+ /* Transfer not aligned data */
+ if (!aligned) {
+ chip->pagebuf = realpage;
+ memcpy(buf, chip->buffers.databuf + col, bytes);
}
- if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: " "Failed ECC read, page 0x%08x\n", page);
- ecc_failed++;
+ buf += bytes;
+
+ if (unlikely(oob)) {
+ /* Raw mode does data:oob:data:oob */
+ if (ops->mode != MTD_OOB_RAW)
+ oob = nand_transfer_oob(chip, oob, ops);
+ else
+ buf = nand_transfer_oob(chip, buf, ops);
}
- }
- readoob:
- /* check, if we have a fs supplied oob-buffer */
- if (oob_buf) {
- /* without autoplace. Legacy mode used by YAFFS1 */
- switch (oobsel->useecc) {
- case MTD_NANDECC_AUTOPLACE:
- case MTD_NANDECC_AUTOPL_USR:
- /* Walk through the autoplace chunks */
- for (i = 0; oobsel->oobfree[i][1]; i++) {
- int from = oobsel->oobfree[i][0];
- int num = oobsel->oobfree[i][1];
- memcpy(&oob_buf[oob], &oob_data[from], num);
- oob += num;
- }
- break;
- case MTD_NANDECC_PLACE:
- /* YAFFS1 legacy mode */
- oob_data += this->ecc.steps * sizeof(int);
- default:
- oob_data += mtd->oobsize;
+ if (!(chip->options & NAND_NO_READRDY)) {
+ /*
+ * Apply delay or wait for ready/busy pin. Do
+ * this before the AUTOINCR check, so no
+ * problems arise if a chip which does auto
+ * increment is marked as NOAUTOINCR by the
+ * board driver.
+ */
+ if (!chip->dev_ready)
+ udelay(chip->chip_delay);
+ else
+ nand_wait_ready(mtd);
}
+ } else {
+ memcpy(buf, chip->buffers.databuf + col, bytes);
+ buf += bytes;
}
- readdata:
- /* Partial page read, transfer data into fs buffer */
- if (!aligned) {
- for (j = col; j < end && read < len; j++)
- buf[read++] = data_poi[j];
- this->pagebuf = realpage;
- } else
- read += mtd->writesize;
-
- /* Apply delay or wait for ready/busy pin
- * Do this before the AUTOINCR check, so no problems
- * arise if a chip which does auto increment
- * is marked as NOAUTOINCR by the board driver.
- */
- if (!this->dev_ready)
- udelay(this->chip_delay);
- else
- nand_wait_ready(mtd);
- if (read == len)
+ readlen -= bytes;
+
+ if (!readlen)
break;
/* For subsequent reads align to page boundary. */
/* Increment page address */
realpage++;
- page = realpage & this->pagemask;
+ page = realpage & chip->pagemask;
/* Check, if we cross a chip boundary */
if (!page) {
chipnr++;
- this->select_chip(mtd, -1);
- this->select_chip(mtd, chipnr);
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
}
+
/* Check, if the chip supports auto page increment
* or if we have hit a block boundary.
*/
- if (!NAND_CANAUTOINCR(this) || !(page & blockcheck))
+ if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck))
sndcmd = 1;
}
- /* Deselect and wake up anyone waiting on the device */
- if (flags & NAND_GET_DEVICE)
- nand_release_device(mtd);
+ ops->retlen = ops->len - (size_t) readlen;
- /*
- * Return success, if no ECC failures, else -EBADMSG
- * fs driver will take care of that, because
- * retlen == desired len and result == -EBADMSG
- */
- *retlen = read;
- return ecc_failed ? -EBADMSG : 0;
+ if (ret)
+ return ret;
+
+ if (mtd->ecc_stats.failed - stats.failed)
+ return -EBADMSG;
+
+ return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
}
/**
- * nand_read_oob - [MTD Interface] NAND read out-of-band
+ * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc
* @mtd: MTD device structure
* @from: offset to read from
* @len: number of bytes to read
* @retlen: pointer to variable to store the number of read bytes
* @buf: the databuffer to put data
*
+ * Get hold of the chip and call nand_do_read
+ */
+static int nand_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, uint8_t *buf)
+{
+ struct nand_chip *chip = mtd->priv;
+ int ret;
+
+ /* Do not allow reads past end of device */
+ if ((from + len) > mtd->size)
+ return -EINVAL;
+ if (!len)
+ return 0;
+
+ nand_get_device(chip, mtd, FL_READING);
+
+ chip->ops.len = len;
+ chip->ops.datbuf = buf;
+ chip->ops.oobbuf = NULL;
+
+ ret = nand_do_read_ops(mtd, from, &chip->ops);
+
+ nand_release_device(mtd);
+
+ *retlen = chip->ops.retlen;
+ return ret;
+}
+
+/**
+ * nand_do_read_oob - [Intern] NAND read out-of-band
+ * @mtd: MTD device structure
+ * @from: offset to read from
+ * @ops: oob operations description structure
+ *
* NAND read out-of-band data from the spare area
*/
-static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf)
+static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
{
- int i, col, page, chipnr;
- struct nand_chip *this = mtd->priv;
- int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
+ int col, page, realpage, chipnr, sndcmd = 1;
+ struct nand_chip *chip = mtd->priv;
+ int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
+ int direct, bytes, readlen = ops->len;
+ uint8_t *bufpoi, *buf = ops->oobbuf;
- DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len);
+ DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08x, len = %i\n",
+ (unsigned int)from, (int)len);
+
+ chipnr = (int)(from >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
/* Shift to get page */
- page = (int)(from >> this->page_shift);
- chipnr = (int)(from >> this->chip_shift);
+ realpage = (int)(from >> chip->page_shift);
+ page = realpage & chip->pagemask;
- /* Mask to get column */
- col = from & (mtd->oobsize - 1);
+ if (ops->mode != MTD_OOB_AUTO) {
+ col = ops->ooboffs;
+ direct = 1;
+ } else {
+ col = 0;
+ direct = 0;
+ }
- /* Initialize return length value */
- *retlen = 0;
+ while(1) {
+ bytes = direct ? ops->ooblen : mtd->oobsize;
+ bufpoi = direct ? buf : chip->buffers.oobrbuf;
- /* Do not allow reads past end of device */
- if ((from + len) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: Attempt read beyond end of device\n");
- *retlen = 0;
- return -EINVAL;
- }
+ if (likely(sndcmd)) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, col, page);
+ sndcmd = 0;
+ }
- /* Grab the lock and see if the device is available */
- nand_get_device(this, mtd, FL_READING);
+ chip->read_buf(mtd, bufpoi, bytes);
- /* Select the NAND device */
- this->select_chip(mtd, chipnr);
+ if (unlikely(!direct))
+ buf = nand_transfer_oob(chip, buf, ops);
+ else
+ buf += ops->ooblen;
- /* Send the read command */
- this->cmdfunc(mtd, NAND_CMD_READOOB, col, page & this->pagemask);
- /*
- * Read the data, if we read more than one page
- * oob data, let the device transfer the data !
- */
- i = 0;
- while (i < len) {
- int thislen = mtd->oobsize - col;
- thislen = min_t(int, thislen, len);
- this->read_buf(mtd, &buf[i], thislen);
- i += thislen;
-
- /* Read more ? */
- if (i < len) {
- page++;
- col = 0;
-
- /* Check, if we cross a chip boundary */
- if (!(page & this->pagemask)) {
- chipnr++;
- this->select_chip(mtd, -1);
- this->select_chip(mtd, chipnr);
- }
+ readlen -= ops->ooblen;
+ if (!readlen)
+ break;
- /* Apply delay or wait for ready/busy pin
- * Do this before the AUTOINCR check, so no problems
- * arise if a chip which does auto increment
- * is marked as NOAUTOINCR by the board driver.
+ if (!(chip->options & NAND_NO_READRDY)) {
+ /*
+ * Apply delay or wait for ready/busy pin. Do this
+ * before the AUTOINCR check, so no problems arise if a
+ * chip which does auto increment is marked as
+ * NOAUTOINCR by the board driver.
*/
- if (!this->dev_ready)
- udelay(this->chip_delay);
+ if (!chip->dev_ready)
+ udelay(chip->chip_delay);
else
nand_wait_ready(mtd);
+ }
- /* Check, if the chip supports auto page increment
- * or if we have hit a block boundary.
- */
- if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) {
- /* For subsequent page reads set offset to 0 */
- this->cmdfunc(mtd, NAND_CMD_READOOB, 0x0, page & this->pagemask);
- }
+ /* Increment page address */
+ realpage++;
+
+ page = realpage & chip->pagemask;
+ /* Check, if we cross a chip boundary */
+ if (!page) {
+ chipnr++;
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
}
- }
- /* Deselect and wake up anyone waiting on the device */
- nand_release_device(mtd);
+ /* Check, if the chip supports auto page increment
+ * or if we have hit a block boundary.
+ */
+ if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck))
+ sndcmd = 1;
+ }
- /* Return happy */
- *retlen = len;
+ ops->retlen = ops->len;
return 0;
}
/**
- * nand_read_raw - [GENERIC] Read raw data including oob into buffer
+ * nand_read_oob - [MTD Interface] NAND read data and/or out-of-band
* @mtd: MTD device structure
- * @buf: temporary buffer
* @from: offset to read from
- * @len: number of bytes to read
- * @ooblen: number of oob data bytes to read
+ * @ops: oob operation description structure
*
- * Read raw data including oob into buffer
+ * NAND read data and/or out-of-band data
*/
-int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen)
+static int nand_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
{
- struct nand_chip *this = mtd->priv;
- int page = (int)(from >> this->page_shift);
- int chip = (int)(from >> this->chip_shift);
- int sndcmd = 1;
- int cnt = 0;
- int pagesize = mtd->writesize + mtd->oobsize;
- int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
+ int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf) = NULL;
+ struct nand_chip *chip = mtd->priv;
+ int ret = -ENOTSUPP;
+
+ ops->retlen = 0;
/* Do not allow reads past end of device */
- if ((from + len) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt read beyond end of device\n");
+ if ((from + ops->len) > mtd->size) {
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
+ "Attempt read beyond end of device\n");
return -EINVAL;
}
- /* Grab the lock and see if the device is available */
- nand_get_device(this, mtd, FL_READING);
+ nand_get_device(chip, mtd, FL_READING);
- this->select_chip(mtd, chip);
+ switch(ops->mode) {
+ case MTD_OOB_PLACE:
+ case MTD_OOB_AUTO:
+ break;
- /* Add requested oob length */
- len += ooblen;
+ case MTD_OOB_RAW:
+ /* Replace the read_page algorithm temporary */
+ read_page = chip->ecc.read_page;
+ chip->ecc.read_page = nand_read_page_raw;
+ break;
- while (len) {
- if (sndcmd)
- this->cmdfunc(mtd, NAND_CMD_READ0, 0, page & this->pagemask);
- sndcmd = 0;
+ default:
+ goto out;
+ }
- this->read_buf(mtd, &buf[cnt], pagesize);
+ if (!ops->datbuf)
+ ret = nand_do_read_oob(mtd, from, ops);
+ else
+ ret = nand_do_read_ops(mtd, from, ops);
- len -= pagesize;
- cnt += pagesize;
- page++;
+ if (unlikely(ops->mode == MTD_OOB_RAW))
+ chip->ecc.read_page = read_page;
+ out:
+ nand_release_device(mtd);
+ return ret;
+}
- if (!this->dev_ready)
- udelay(this->chip_delay);
- else
- nand_wait_ready(mtd);
- /* Check, if the chip supports auto page increment */
- if (!NAND_CANAUTOINCR(this) || !(page & blockcheck))
- sndcmd = 1;
+/**
+ * nand_write_page_raw - [Intern] raw page write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
+ */
+static void nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ chip->write_buf(mtd, buf, mtd->writesize);
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+}
+
+/**
+ * nand_write_page_swecc - {REPLACABLE] software ecc based page write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
+ */
+static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *ecc_calc = chip->buffers.ecccalc;
+ const uint8_t *p = buf;
+ int *eccpos = chip->ecc.layout->eccpos;
+
+ /* Software ecc calculation */
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
+
+ for (i = 0; i < chip->ecc.total; i++)
+ chip->oob_poi[eccpos[i]] = ecc_calc[i];
+
+ nand_write_page_raw(mtd, chip, buf);
+}
+
+/**
+ * nand_write_page_hwecc - {REPLACABLE] hardware ecc based page write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
+ */
+static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *ecc_calc = chip->buffers.ecccalc;
+ const uint8_t *p = buf;
+ int *eccpos = chip->ecc.layout->eccpos;
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
+ chip->write_buf(mtd, p, eccsize);
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
}
- /* Deselect and wake up anyone waiting on the device */
- nand_release_device(mtd);
- return 0;
+ for (i = 0; i < chip->ecc.total; i++)
+ chip->oob_poi[eccpos[i]] = ecc_calc[i];
+
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
}
/**
- * nand_write_raw - [GENERIC] Write raw data including oob
- * @mtd: MTD device structure
- * @buf: source buffer
- * @to: offset to write to
- * @len: number of bytes to write
- * @buf: source buffer
- * @oob: oob buffer
+ * nand_write_page_syndrome - {REPLACABLE] hardware ecc syndrom based page write
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
*
- * Write raw data including oob
+ * The hw generator calculates the error syndrome automatically. Therefor
+ * we need a special oob layout and handling.
*/
-int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
- uint8_t *buf, uint8_t *oob)
+static void nand_write_page_syndrome(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
{
- struct nand_chip *this = mtd->priv;
- int page = (int)(to >> this->page_shift);
- int chip = (int)(to >> this->chip_shift);
- int ret;
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ const uint8_t *p = buf;
+ uint8_t *oob = chip->oob_poi;
- *retlen = 0;
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- /* Do not allow writes past end of device */
- if ((to + len) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt write "
- "beyond end of device\n");
- return -EINVAL;
- }
+ chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
+ chip->write_buf(mtd, p, eccsize);
- /* Grab the lock and see if the device is available */
- nand_get_device(this, mtd, FL_WRITING);
+ if (chip->ecc.prepad) {
+ chip->write_buf(mtd, oob, chip->ecc.prepad);
+ oob += chip->ecc.prepad;
+ }
- this->select_chip(mtd, chip);
- this->data_poi = buf;
+ chip->ecc.calculate(mtd, p, oob);
+ chip->write_buf(mtd, oob, eccbytes);
+ oob += eccbytes;
- while (len != *retlen) {
- ret = nand_write_page(mtd, this, page, oob, &mtd->oobinfo, 0);
- if (ret)
- return ret;
- page++;
- *retlen += mtd->writesize;
- this->data_poi += mtd->writesize;
- oob += mtd->oobsize;
+ if (chip->ecc.postpad) {
+ chip->write_buf(mtd, oob, chip->ecc.postpad);
+ oob += chip->ecc.postpad;
+ }
}
- /* Deselect and wake up anyone waiting on the device */
- nand_release_device(mtd);
- return 0;
+ /* Calculate remaining oob bytes */
+ i = oob - chip->oob_poi;
+ if (i)
+ chip->write_buf(mtd, oob, i);
}
-EXPORT_SYMBOL_GPL(nand_write_raw);
/**
- * nand_prepare_oobbuf - [GENERIC] Prepare the out of band buffer
+ * nand_write_page - [INTERNAL] write one page
* @mtd: MTD device structure
- * @fsbuf: buffer given by fs driver
- * @oobsel: out of band selection structre
- * @autoplace: 1 = place given buffer into the oob bytes
- * @numpages: number of pages to prepare
- *
- * Return:
- * 1. Filesystem buffer available and autoplacement is off,
- * return filesystem buffer
- * 2. No filesystem buffer or autoplace is off, return internal
- * buffer
- * 3. Filesystem buffer is given and autoplace selected
- * put data from fs buffer into internal buffer and
- * retrun internal buffer
- *
- * Note: The internal buffer is filled with 0xff. This must
- * be done only once, when no autoplacement happens
- * Autoplacement sets the buffer dirty flag, which
- * forces the 0xff fill before using the buffer again.
- *
-*/
-static uint8_t *nand_prepare_oobbuf(struct mtd_info *mtd, uint8_t *fsbuf, struct nand_oobinfo *oobsel,
- int autoplace, int numpages)
+ * @chip: NAND chip descriptor
+ * @buf: the data to write
+ * @page: page number to write
+ * @cached: cached programming
+ */
+static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf, int page, int cached)
{
- struct nand_chip *this = mtd->priv;
- int i, len, ofs;
+ int status;
- /* Zero copy fs supplied buffer */
- if (fsbuf && !autoplace)
- return fsbuf;
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
- /* Check, if the buffer must be filled with ff again */
- if (this->oobdirty) {
- memset(this->oob_buf, 0xff, mtd->oobsize << (this->phys_erase_shift - this->page_shift));
- this->oobdirty = 0;
+ chip->ecc.write_page(mtd, chip, buf);
+
+ /*
+ * Cached progamming disabled for now, Not sure if its worth the
+ * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s)
+ */
+ cached = 0;
+
+ if (!cached || !(chip->options & NAND_CACHEPRG)) {
+
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip, FL_WRITING);
+ /*
+ * See if operation failed and additional status checks are
+ * available
+ */
+ if ((status & NAND_STATUS_FAIL) && (chip->errstat))
+ status = chip->errstat(mtd, chip, FL_WRITING, status,
+ page);
+
+ if (status & NAND_STATUS_FAIL)
+ return -EIO;
+ } else {
+ chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip, FL_WRITING);
}
- /* If we have no autoplacement or no fs buffer use the internal one */
- if (!autoplace || !fsbuf)
- return this->oob_buf;
-
- /* Walk through the pages and place the data */
- this->oobdirty = 1;
- ofs = 0;
- while (numpages--) {
- for (i = 0, len = 0; len < mtd->oobavail; i++) {
- int to = ofs + oobsel->oobfree[i][0];
- int num = oobsel->oobfree[i][1];
- memcpy(&this->oob_buf[to], fsbuf, num);
- len += num;
- fsbuf += num;
+#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;
+}
+
+/**
+ * nand_fill_oob - [Internal] Transfer client buffer to oob
+ * @chip: nand chip structure
+ * @oob: oob data buffer
+ * @ops: oob ops structure
+ */
+static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob,
+ struct mtd_oob_ops *ops)
+{
+ size_t len = ops->ooblen;
+
+ switch(ops->mode) {
+
+ case MTD_OOB_PLACE:
+ case MTD_OOB_RAW:
+ memcpy(chip->oob_poi + ops->ooboffs, oob, len);
+ return oob + len;
+
+ case MTD_OOB_AUTO: {
+ struct nand_oobfree *free = chip->ecc.layout->oobfree;
+ size_t bytes;
+
+ for(; free->length && len; free++, len -= bytes) {
+ bytes = min(len, free->length);
+ memcpy(chip->oob_poi + free->offset, oob, bytes);
+ oob += bytes;
}
- ofs += mtd->oobavail;
+ return oob;
}
- return this->oob_buf;
+ default:
+ BUG();
+ }
+ return NULL;
}
#define NOTALIGNED(x) (x & (mtd->writesize-1)) != 0
/**
- * nand_write - [MTD Interface] NAND write with ECC
+ * nand_do_write_ops - [Internal] NAND write with ECC
* @mtd: MTD device structure
* @to: offset to write to
- * @len: number of bytes to write
- * @retlen: pointer to variable to store the number of written bytes
- * @buf: the data to write
+ * @ops: oob operations description structure
*
* NAND write with ECC
*/
-static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const uint8_t *buf)
+static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
{
- int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr;
- int autoplace = 0, numpages, totalpages;
- struct nand_chip *this = mtd->priv;
- uint8_t *oobbuf, *bufstart, *eccbuf = NULL;
- int ppblock = (1 << (this->phys_erase_shift - this->page_shift));
- struct nand_oobinfo *oobsel = &mtd->oobinfo;
-
- DEBUG(MTD_DEBUG_LEVEL3, "nand_write: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len);
-
- /* Initialize retlen, in case of early exit */
- *retlen = 0;
+ int chipnr, realpage, page, blockmask;
+ struct nand_chip *chip = mtd->priv;
+ uint32_t writelen = ops->len;
+ uint8_t *oob = ops->oobbuf;
+ uint8_t *buf = ops->datbuf;
+ int bytes = mtd->writesize;
+ int ret;
- /* Do not allow write past end of device */
- if ((to + len) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write: Attempt to write past end of page\n");
- return -EINVAL;
- }
+ ops->retlen = 0;
/* reject writes, which are not page aligned */
- if (NOTALIGNED(to) || NOTALIGNED(len)) {
- printk(KERN_NOTICE "nand_write: Attempt to write not page aligned data\n");
+ if (NOTALIGNED(to) || NOTALIGNED(ops->len)) {
+ printk(KERN_NOTICE "nand_write: "
+ "Attempt to write not page aligned data\n");
return -EINVAL;
}
- /* Grab the lock and see if the device is available */
- nand_get_device(this, mtd, FL_WRITING);
-
- /* Calculate chipnr */
- chipnr = (int)(to >> this->chip_shift);
- /* Select the NAND device */
- this->select_chip(mtd, chipnr);
+ if (!writelen)
+ return 0;
/* Check, if it is write protected */
if (nand_check_wp(mtd))
- goto out;
+ return -EIO;
- /* Autoplace of oob data ? Use the default placement scheme */
- if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) {
- oobsel = this->autooob;
- autoplace = 1;
- }
- if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR)
- autoplace = 1;
+ chipnr = (int)(to >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
- /* Setup variables and oob buffer */
- totalpages = len >> this->page_shift;
- page = (int)(to >> this->page_shift);
- /* Invalidate the page cache, if we write to the cached page */
- if (page <= this->pagebuf && this->pagebuf < (page + totalpages))
- this->pagebuf = -1;
-
- /* Set it relative to chip */
- page &= this->pagemask;
- startpage = page;
- /* Calc number of pages we can write in one go */
- numpages = min(ppblock - (startpage & (ppblock - 1)), totalpages);
- oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages);
- bufstart = (uint8_t *) buf;
-
- /* Loop until all data is written */
- while (written < len) {
-
- this->data_poi = (uint8_t *) &buf[written];
- /* Write one page. If this is the last page to write
- * or the last page in this block, then use the
- * real pageprogram command, else select cached programming
- * if supported by the chip.
- */
- ret = nand_write_page(mtd, this, page, &oobbuf[oob], oobsel, (--numpages > 0));
- if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write: write_page failed %d\n", ret);
- goto out;
- }
- /* Next oob page */
- oob += mtd->oobsize;
- /* Update written bytes count */
- written += mtd->writesize;
- if (written == len)
- goto cmp;
+ realpage = (int)(to >> chip->page_shift);
+ page = realpage & chip->pagemask;
+ blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
- /* Increment page address */
- page++;
+ /* Invalidate the page cache, when we write to the cached page */
+ if (to <= (chip->pagebuf << chip->page_shift) &&
+ (chip->pagebuf << chip->page_shift) < (to + ops->len))
+ chip->pagebuf = -1;
- /* Have we hit a block boundary ? Then we have to verify and
- * if verify is ok, we have to setup the oob buffer for
- * the next pages.
- */
- if (!(page & (ppblock - 1))) {
- int ofs;
- this->data_poi = bufstart;
- ret = nand_verify_pages(mtd, this, startpage, page - startpage,
- oobbuf, oobsel, chipnr, (eccbuf != NULL));
- if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write: verify_pages failed %d\n", ret);
- goto out;
- }
- *retlen = written;
-
- ofs = autoplace ? mtd->oobavail : mtd->oobsize;
- if (eccbuf)
- eccbuf += (page - startpage) * ofs;
- totalpages -= page - startpage;
- numpages = min(totalpages, ppblock);
- page &= this->pagemask;
- startpage = page;
- oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages);
- oob = 0;
- /* Check, if we cross a chip boundary */
- if (!page) {
- chipnr++;
- this->select_chip(mtd, -1);
- this->select_chip(mtd, chipnr);
- }
+ chip->oob_poi = chip->buffers.oobwbuf;
+
+ while(1) {
+ int cached = writelen > bytes && page != blockmask;
+
+ if (unlikely(oob))
+ oob = nand_fill_oob(chip, oob, ops);
+
+ ret = nand_write_page(mtd, chip, buf, page, cached);
+ if (ret)
+ break;
+
+ writelen -= bytes;
+ if (!writelen)
+ break;
+
+ buf += bytes;
+ realpage++;
+
+ page = realpage & chip->pagemask;
+ /* Check, if we cross a chip boundary */
+ if (!page) {
+ chipnr++;
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
}
}
- /* Verify the remaining pages */
- cmp:
- this->data_poi = bufstart;
- ret = nand_verify_pages(mtd, this, startpage, totalpages, oobbuf, oobsel, chipnr, (eccbuf != NULL));
- if (!ret)
- *retlen = written;
- else
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write: verify_pages failed %d\n", ret);
- out:
- /* Deselect and wake up anyone waiting on the device */
- nand_release_device(mtd);
+ if (unlikely(oob))
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
+ ops->retlen = ops->len - writelen;
return ret;
}
/**
- * nand_write_oob - [MTD Interface] NAND write out-of-band
+ * nand_write - [MTD Interface] NAND write with ECC
* @mtd: MTD device structure
* @to: offset to write to
* @len: number of bytes to write
* @retlen: pointer to variable to store the number of written bytes
* @buf: the data to write
*
- * NAND write out-of-band
+ * NAND write with ECC
*/
-static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const uint8_t *buf)
+static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const uint8_t *buf)
{
- int column, page, status, ret = -EIO, chipnr;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
+ int ret;
- DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len);
+ /* Do not allow reads past end of device */
+ if ((to + len) > mtd->size)
+ return -EINVAL;
+ if (!len)
+ return 0;
- /* Shift to get page */
- page = (int)(to >> this->page_shift);
- chipnr = (int)(to >> this->chip_shift);
+ nand_get_device(chip, mtd, FL_READING);
+
+ chip->ops.len = len;
+ chip->ops.datbuf = (uint8_t *)buf;
+ chip->ops.oobbuf = NULL;
- /* Mask to get column */
- column = to & (mtd->oobsize - 1);
+ ret = nand_do_write_ops(mtd, to, &chip->ops);
- /* Initialize return length value */
- *retlen = 0;
+ nand_release_device(mtd);
+
+ *retlen = chip->ops.retlen;
+ return ret;
+}
+
+/**
+ * nand_do_write_oob - [MTD Interface] NAND write out-of-band
+ * @mtd: MTD device structure
+ * @to: offset to write to
+ * @ops: oob operation description structure
+ *
+ * NAND write out-of-band
+ */
+static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ int chipnr, page, status;
+ struct nand_chip *chip = mtd->priv;
+
+ DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n",
+ (unsigned int)to, (int)ops->len);
/* Do not allow write past end of page */
- if ((column + len) > mtd->oobsize) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: Attempt to write past end of page\n");
+ if ((ops->ooboffs + ops->len) > mtd->oobsize) {
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
+ "Attempt to write past end of page\n");
return -EINVAL;
}
- /* Grab the lock and see if the device is available */
- nand_get_device(this, mtd, FL_WRITING);
+ chipnr = (int)(to >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
- /* Select the NAND device */
- this->select_chip(mtd, chipnr);
+ /* Shift to get page */
+ page = (int)(to >> chip->page_shift);
- /* Reset the chip. Some chips (like the Toshiba TC5832DC found
- in one of my DiskOnChip 2000 test units) will clear the whole
- data page too if we don't do this. I have no clue why, but
- I seem to have 'fixed' it in the doc2000 driver in
- August 1999. dwmw2. */
- this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+ /*
+ * Reset the chip. Some chips (like the Toshiba TC5832DC found in one
+ * of my DiskOnChip 2000 test units) will clear the whole data page too
+ * if we don't do this. I have no clue why, but I seem to have 'fixed'
+ * it in the doc2000 driver in August 1999. dwmw2.
+ */
+ chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
/* Check, if it is write protected */
if (nand_check_wp(mtd))
- goto out;
+ return -EROFS;
/* Invalidate the page cache, if we write to the cached page */
- if (page == this->pagebuf)
- this->pagebuf = -1;
-
- if (NAND_MUST_PAD(this)) {
- /* Write out desired data */
- this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page & this->pagemask);
- /* prepad 0xff for partial programming */
- this->write_buf(mtd, ffchars, column);
- /* write data */
- this->write_buf(mtd, buf, len);
- /* postpad 0xff for partial programming */
- this->write_buf(mtd, ffchars, mtd->oobsize - (len + column));
+ if (page == chip->pagebuf)
+ chip->pagebuf = -1;
+
+ if (ops->mode == MTD_OOB_AUTO || NAND_MUST_PAD(chip)) {
+ chip->oob_poi = chip->buffers.oobwbuf;
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
+ nand_fill_oob(chip, ops->oobbuf, ops);
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize,
+ page & chip->pagemask);
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
} else {
- /* Write out desired data */
- this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize + column, page & this->pagemask);
- /* write data */
- this->write_buf(mtd, buf, len);
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN,
+ mtd->writesize + ops->ooboffs,
+ page & chip->pagemask);
+ chip->write_buf(mtd, ops->oobbuf, ops->len);
}
+
/* Send command to program the OOB data */
- this->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
- status = this->waitfunc(mtd, this, FL_WRITING);
+ status = chip->waitfunc(mtd, chip, FL_WRITING);
/* See if device thinks it succeeded */
if (status & NAND_STATUS_FAIL) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write, page 0x%08x\n", page);
- ret = -EIO;
- goto out;
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
+ "Failed write, page 0x%08x\n", page);
+ return -EIO;
}
- /* Return happy */
- *retlen = len;
+ ops->retlen = ops->len;
#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
- /* Send command to read back the data */
- this->cmdfunc(mtd, NAND_CMD_READOOB, column, page & this->pagemask);
+ if (ops->mode != MTD_OOB_AUTO) {
+ /* Send command to read back the data */
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, ops->ooboffs,
+ page & chip->pagemask);
+
+ if (chip->verify_buf(mtd, ops->oobbuf, ops->len)) {
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
+ "Failed write verify, page 0x%08x\n", page);
+ return -EIO;
+ }
+ }
+#endif
+ return 0;
+}
+
+/**
+ * nand_write_oob - [MTD Interface] NAND write data and/or out-of-band
+ * @mtd: MTD device structure
+ * @from: offset to read from
+ * @ops: oob operation description structure
+ */
+static int nand_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ void (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf) = NULL;
+ struct nand_chip *chip = mtd->priv;
+ int ret = -ENOTSUPP;
- if (this->verify_buf(mtd, buf, len)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write verify, page 0x%08x\n", page);
- ret = -EIO;
+ ops->retlen = 0;
+
+ /* Do not allow writes past end of device */
+ if ((to + ops->len) > mtd->size) {
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
+ "Attempt read beyond end of device\n");
+ return -EINVAL;
+ }
+
+ nand_get_device(chip, mtd, FL_READING);
+
+ switch(ops->mode) {
+ case MTD_OOB_PLACE:
+ case MTD_OOB_AUTO:
+ break;
+
+ case MTD_OOB_RAW:
+ /* Replace the write_page algorithm temporary */
+ write_page = chip->ecc.write_page;
+ chip->ecc.write_page = nand_write_page_raw;
+ break;
+
+ default:
goto out;
}
-#endif
- ret = 0;
+
+ if (!ops->datbuf)
+ ret = nand_do_write_oob(mtd, to, ops);
+ else
+ ret = nand_do_write_ops(mtd, to, ops);
+
+ if (unlikely(ops->mode == MTD_OOB_RAW))
+ chip->ecc.write_page = write_page;
out:
- /* Deselect and wake up anyone waiting on the device */
nand_release_device(mtd);
-
return ret;
}
*/
static void single_erase_cmd(struct mtd_info *mtd, int page)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
/* Send commands to erase a block */
- this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
- this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
}
/**
*/
static void multi_erase_cmd(struct mtd_info *mtd, int page)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
/* Send commands to erase a block */
- this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
- this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
- this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
- this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
- this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
+ chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
}
/**
#define BBT_PAGE_MASK 0xffffff3f
/**
- * nand_erase_intern - [NAND Interface] erase block(s)
+ * nand_erase_nand - [Internal] erase block(s)
* @mtd: MTD device structure
* @instr: erase instruction
* @allowbbt: allow erasing the bbt area
*
* Erase one ore more blocks
*/
-int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, int allowbbt)
+int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
+ int allowbbt)
{
int page, len, status, pages_per_block, ret, chipnr;
- struct nand_chip *this = mtd->priv;
- int rewrite_bbt[NAND_MAX_CHIPS]={0}; /* flags to indicate the page, if bbt needs to be rewritten. */
- unsigned int bbt_masked_page; /* bbt mask to compare to page being erased. */
- /* It is used to see if the current page is in the same */
- /* 256 block group and the same bank as the bbt. */
+ struct nand_chip *chip = mtd->priv;
+ int rewrite_bbt[NAND_MAX_CHIPS]={0};
+ unsigned int bbt_masked_page = 0xffffffff;
- DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n", (unsigned int)instr->addr, (unsigned int)instr->len);
+ DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n",
+ (unsigned int)instr->addr, (unsigned int)instr->len);
/* Start address must align on block boundary */
- if (instr->addr & ((1 << this->phys_erase_shift) - 1)) {
+ if (instr->addr & ((1 << chip->phys_erase_shift) - 1)) {
DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n");
return -EINVAL;
}
/* Length must align on block boundary */
- if (instr->len & ((1 << this->phys_erase_shift) - 1)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Length not block aligned\n");
+ if (instr->len & ((1 << chip->phys_erase_shift) - 1)) {
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
+ "Length not block aligned\n");
return -EINVAL;
}
/* Do not allow erase past end of device */
if ((instr->len + instr->addr) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Erase past end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
+ "Erase past end of device\n");
return -EINVAL;
}
instr->fail_addr = 0xffffffff;
/* Grab the lock and see if the device is available */
- nand_get_device(this, mtd, FL_ERASING);
+ nand_get_device(chip, mtd, FL_ERASING);
/* Shift to get first page */
- page = (int)(instr->addr >> this->page_shift);
- chipnr = (int)(instr->addr >> this->chip_shift);
+ page = (int)(instr->addr >> chip->page_shift);
+ chipnr = (int)(instr->addr >> chip->chip_shift);
/* Calculate pages in each block */
- pages_per_block = 1 << (this->phys_erase_shift - this->page_shift);
+ pages_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
/* Select the NAND device */
- this->select_chip(mtd, chipnr);
+ chip->select_chip(mtd, chipnr);
- /* Check the WP bit */
/* Check, if it is write protected */
if (nand_check_wp(mtd)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Device is write protected!!!\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
+ "Device is write protected!!!\n");
instr->state = MTD_ERASE_FAILED;
goto erase_exit;
}
- /* if BBT requires refresh, set the BBT page mask to see if the BBT should be rewritten */
- if (this->options & BBT_AUTO_REFRESH) {
- bbt_masked_page = this->bbt_td->pages[chipnr] & BBT_PAGE_MASK;
- } else {
- bbt_masked_page = 0xffffffff; /* should not match anything */
- }
+ /*
+ * If BBT requires refresh, set the BBT page mask to see if the BBT
+ * should be rewritten. Otherwise the mask is set to 0xffffffff which
+ * can not be matched. This is also done when the bbt is actually
+ * erased to avoid recusrsive updates
+ */
+ if (chip->options & BBT_AUTO_REFRESH && !allowbbt)
+ bbt_masked_page = chip->bbt_td->pages[chipnr] & BBT_PAGE_MASK;
/* Loop through the pages */
len = instr->len;
instr->state = MTD_ERASING;
while (len) {
- /* Check if we have a bad block, we do not erase bad blocks ! */
- if (nand_block_checkbad(mtd, ((loff_t) page) << this->page_shift, 0, allowbbt)) {
- printk(KERN_WARNING "nand_erase: attempt to erase a bad block at page 0x%08x\n", page);
+ /*
+ * heck if we have a bad block, we do not erase bad blocks !
+ */
+ if (nand_block_checkbad(mtd, ((loff_t) page) <<
+ chip->page_shift, 0, allowbbt)) {
+ printk(KERN_WARNING "nand_erase: attempt to erase a "
+ "bad block at page 0x%08x\n", page);
instr->state = MTD_ERASE_FAILED;
goto erase_exit;
}
- /* Invalidate the page cache, if we erase the block which contains
- the current cached page */
- if (page <= this->pagebuf && this->pagebuf < (page + pages_per_block))
- this->pagebuf = -1;
+ /*
+ * Invalidate the page cache, if we erase the block which
+ * contains the current cached page
+ */
+ if (page <= chip->pagebuf && chip->pagebuf <
+ (page + pages_per_block))
+ chip->pagebuf = -1;
- this->erase_cmd(mtd, page & this->pagemask);
+ chip->erase_cmd(mtd, page & chip->pagemask);
- status = this->waitfunc(mtd, this, FL_ERASING);
+ status = chip->waitfunc(mtd, chip, FL_ERASING);
- /* See if operation failed and additional status checks are available */
- if ((status & NAND_STATUS_FAIL) && (this->errstat)) {
- status = this->errstat(mtd, this, FL_ERASING, status, page);
- }
+ /*
+ * See if operation failed and additional status checks are
+ * available
+ */
+ if ((status & NAND_STATUS_FAIL) && (chip->errstat))
+ status = chip->errstat(mtd, chip, FL_ERASING,
+ status, page);
/* See if block erase succeeded */
if (status & NAND_STATUS_FAIL) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " "Failed erase, page 0x%08x\n", page);
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
+ "Failed erase, page 0x%08x\n", page);
instr->state = MTD_ERASE_FAILED;
- instr->fail_addr = (page << this->page_shift);
+ instr->fail_addr = (page << chip->page_shift);
goto erase_exit;
}
- /* if BBT requires refresh, set the BBT rewrite flag to the page being erased */
- if (this->options & BBT_AUTO_REFRESH) {
- if (((page & BBT_PAGE_MASK) == bbt_masked_page) &&
- (page != this->bbt_td->pages[chipnr])) {
- rewrite_bbt[chipnr] = (page << this->page_shift);
- }
- }
+ /*
+ * If BBT requires refresh, set the BBT rewrite flag to the
+ * page being erased
+ */
+ if (bbt_masked_page != 0xffffffff &&
+ (page & BBT_PAGE_MASK) == bbt_masked_page)
+ rewrite_bbt[chipnr] = (page << chip->page_shift);
/* Increment page address and decrement length */
- len -= (1 << this->phys_erase_shift);
+ len -= (1 << chip->phys_erase_shift);
page += pages_per_block;
/* Check, if we cross a chip boundary */
- if (len && !(page & this->pagemask)) {
+ if (len && !(page & chip->pagemask)) {
chipnr++;
- this->select_chip(mtd, -1);
- this->select_chip(mtd, chipnr);
-
- /* if BBT requires refresh and BBT-PERCHIP,
- * set the BBT page mask to see if this BBT should be rewritten */
- if ((this->options & BBT_AUTO_REFRESH) && (this->bbt_td->options & NAND_BBT_PERCHIP)) {
- bbt_masked_page = this->bbt_td->pages[chipnr] & BBT_PAGE_MASK;
- }
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
+ /*
+ * If BBT requires refresh and BBT-PERCHIP, set the BBT
+ * page mask to see if this BBT should be rewritten
+ */
+ if (bbt_masked_page != 0xffffffff &&
+ (chip->bbt_td->options & NAND_BBT_PERCHIP))
+ bbt_masked_page = chip->bbt_td->pages[chipnr] &
+ BBT_PAGE_MASK;
}
}
instr->state = MTD_ERASE_DONE;
/* Deselect and wake up anyone waiting on the device */
nand_release_device(mtd);
- /* if BBT requires refresh and erase was successful, rewrite any selected bad block tables */
- if ((this->options & BBT_AUTO_REFRESH) && (!ret)) {
- for (chipnr = 0; chipnr < this->numchips; chipnr++) {
- if (rewrite_bbt[chipnr]) {
- /* update the BBT for chip */
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt (%d:0x%0x 0x%0x)\n",
- chipnr, rewrite_bbt[chipnr], this->bbt_td->pages[chipnr]);
- nand_update_bbt(mtd, rewrite_bbt[chipnr]);
- }
- }
+ /*
+ * If BBT requires refresh and erase was successful, rewrite any
+ * selected bad block tables
+ */
+ if (bbt_masked_page == 0xffffffff || ret)
+ return ret;
+
+ for (chipnr = 0; chipnr < chip->numchips; chipnr++) {
+ if (!rewrite_bbt[chipnr])
+ continue;
+ /* update the BBT for chip */
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt "
+ "(%d:0x%0x 0x%0x)\n", chipnr, rewrite_bbt[chipnr],
+ chip->bbt_td->pages[chipnr]);
+ nand_update_bbt(mtd, rewrite_bbt[chipnr]);
}
/* Return more or less happy */
*/
static void nand_sync(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
DEBUG(MTD_DEBUG_LEVEL3, "nand_sync: called\n");
/* Grab the lock and see if the device is available */
- nand_get_device(this, mtd, FL_SYNCING);
+ nand_get_device(chip, mtd, FL_SYNCING);
/* Release it and go back */
nand_release_device(mtd);
}
/**
- * nand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
+ * nand_block_isbad - [MTD Interface] Check if block at offset is bad
* @mtd: MTD device structure
* @ofs: offset relative to mtd start
*/
-static int nand_block_isbad(struct mtd_info *mtd, loff_t ofs)
+static int nand_block_isbad(struct mtd_info *mtd, loff_t offs)
{
/* Check for invalid offset */
- if (ofs > mtd->size)
+ if (offs > mtd->size)
return -EINVAL;
- return nand_block_checkbad(mtd, ofs, 1, 0);
+ return nand_block_checkbad(mtd, offs, 1, 0);
}
/**
- * nand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
+ * nand_block_markbad - [MTD Interface] Mark block at the given offset as bad
* @mtd: MTD device structure
* @ofs: offset relative to mtd start
*/
static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
int ret;
if ((ret = nand_block_isbad(mtd, ofs))) {
return ret;
}
- return this->block_markbad(mtd, ofs);
+ return chip->block_markbad(mtd, ofs);
}
/**
*/
static int nand_suspend(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
- return nand_get_device(this, mtd, FL_PM_SUSPENDED);
+ return nand_get_device(chip, mtd, FL_PM_SUSPENDED);
}
/**
*/
static void nand_resume(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
- if (this->state == FL_PM_SUSPENDED)
+ if (chip->state == FL_PM_SUSPENDED)
nand_release_device(mtd);
else
printk(KERN_ERR "nand_resume() called for a chip which is not "
}
/*
- * Free allocated data structures
- */
-static void nand_free_kmem(struct nand_chip *this)
-{
- /* Buffer allocated by nand_scan ? */
- if (this->options & NAND_OOBBUF_ALLOC)
- kfree(this->oob_buf);
- /* Buffer allocated by nand_scan ? */
- if (this->options & NAND_DATABUF_ALLOC)
- kfree(this->data_buf);
- /* Controller allocated by nand_scan ? */
- if (this->options & NAND_CONTROLLER_ALLOC)
- kfree(this->controller);
-}
-
-/*
- * Allocate buffers and data structures
- */
-static int nand_allocate_kmem(struct mtd_info *mtd, struct nand_chip *this)
-{
- size_t len;
-
- if (!this->oob_buf) {
- len = mtd->oobsize <<
- (this->phys_erase_shift - this->page_shift);
- this->oob_buf = kmalloc(len, GFP_KERNEL);
- if (!this->oob_buf)
- goto outerr;
- this->options |= NAND_OOBBUF_ALLOC;
- }
-
- if (!this->data_buf) {
- len = mtd->writesize + mtd->oobsize;
- this->data_buf = kmalloc(len, GFP_KERNEL);
- if (!this->data_buf)
- goto outerr;
- this->options |= NAND_DATABUF_ALLOC;
- }
-
- if (!this->controller) {
- this->controller = kzalloc(sizeof(struct nand_hw_control),
- GFP_KERNEL);
- if (!this->controller)
- goto outerr;
- this->options |= NAND_CONTROLLER_ALLOC;
- }
- return 0;
-
- outerr:
- printk(KERN_ERR "nand_scan(): Cannot allocate buffers\n");
- nand_free_kmem(this);
- return -ENOMEM;
-}
-
-/*
* Set default functions
*/
-static void nand_set_defaults(struct nand_chip *this, int busw)
+static void nand_set_defaults(struct nand_chip *chip, int busw)
{
/* check for proper chip_delay setup, set 20us if not */
- if (!this->chip_delay)
- this->chip_delay = 20;
+ if (!chip->chip_delay)
+ chip->chip_delay = 20;
/* check, if a user supplied command function given */
- if (this->cmdfunc == NULL)
- this->cmdfunc = nand_command;
+ if (chip->cmdfunc == NULL)
+ chip->cmdfunc = nand_command;
/* check, if a user supplied wait function given */
- if (this->waitfunc == NULL)
- this->waitfunc = nand_wait;
-
- if (!this->select_chip)
- this->select_chip = nand_select_chip;
- if (!this->read_byte)
- this->read_byte = busw ? nand_read_byte16 : nand_read_byte;
- if (!this->read_word)
- this->read_word = nand_read_word;
- if (!this->block_bad)
- this->block_bad = nand_block_bad;
- if (!this->block_markbad)
- this->block_markbad = nand_default_block_markbad;
- if (!this->write_buf)
- this->write_buf = busw ? nand_write_buf16 : nand_write_buf;
- if (!this->read_buf)
- this->read_buf = busw ? nand_read_buf16 : nand_read_buf;
- if (!this->verify_buf)
- this->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf;
- if (!this->scan_bbt)
- this->scan_bbt = nand_default_bbt;
+ if (chip->waitfunc == NULL)
+ chip->waitfunc = nand_wait;
+
+ if (!chip->select_chip)
+ chip->select_chip = nand_select_chip;
+ if (!chip->read_byte)
+ chip->read_byte = busw ? nand_read_byte16 : nand_read_byte;
+ if (!chip->read_word)
+ chip->read_word = nand_read_word;
+ if (!chip->block_bad)
+ chip->block_bad = nand_block_bad;
+ if (!chip->block_markbad)
+ chip->block_markbad = nand_default_block_markbad;
+ if (!chip->write_buf)
+ 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;
+
+ if (!chip->controller) {
+ chip->controller = &chip->hwcontrol;
+ spin_lock_init(&chip->controller->lock);
+ init_waitqueue_head(&chip->controller->wq);
+ }
+
}
/*
- * Get the flash and manufacturer id and lookup if the typ is supported
+ * Get the flash and manufacturer id and lookup if the type is supported
*/
static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
- struct nand_chip *this,
+ struct nand_chip *chip,
int busw, int *maf_id)
{
struct nand_flash_dev *type = NULL;
int i, dev_id, maf_idx;
/* Select the device */
- this->select_chip(mtd, 0);
+ chip->select_chip(mtd, 0);
/* Send the command for reading device ID */
- this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
+ chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
/* Read manufacturer and device IDs */
- *maf_id = this->read_byte(mtd);
- dev_id = this->read_byte(mtd);
+ *maf_id = chip->read_byte(mtd);
+ dev_id = chip->read_byte(mtd);
/* Lookup the flash id */
for (i = 0; nand_flash_ids[i].name != NULL; i++) {
if (!type)
return ERR_PTR(-ENODEV);
- this->chipsize = nand_flash_ids[i].chipsize << 20;
+ if (!mtd->name)
+ mtd->name = type->name;
+
+ chip->chipsize = type->chipsize << 20;
/* Newer devices have all the information in additional id bytes */
- if (!nand_flash_ids[i].pagesize) {
+ if (!type->pagesize) {
int extid;
/* The 3rd id byte contains non relevant data ATM */
- extid = this->read_byte(mtd);
+ extid = chip->read_byte(mtd);
/* The 4th id byte is the important one */
- extid = this->read_byte(mtd);
+ extid = chip->read_byte(mtd);
/* Calc pagesize */
mtd->writesize = 1024 << (extid & 0x3);
extid >>= 2;
} else {
/*
- * Old devices have this data hardcoded in the device id table
+ * Old devices have chip data hardcoded in the device id table
*/
- mtd->erasesize = nand_flash_ids[i].erasesize;
- mtd->writesize = nand_flash_ids[i].pagesize;
+ mtd->erasesize = type->erasesize;
+ mtd->writesize = type->pagesize;
mtd->oobsize = mtd->writesize / 32;
- busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16;
+ busw = type->options & NAND_BUSWIDTH_16;
}
/* Try to identify manufacturer */
/*
* Check, if buswidth is correct. Hardware drivers should set
- * this correct !
+ * chip correct !
*/
- if (busw != (this->options & NAND_BUSWIDTH_16)) {
+ if (busw != (chip->options & NAND_BUSWIDTH_16)) {
printk(KERN_INFO "NAND device: Manufacturer ID:"
" 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id,
dev_id, nand_manuf_ids[maf_idx].name, mtd->name);
printk(KERN_WARNING "NAND bus width %d instead %d bit\n",
- (this->options & NAND_BUSWIDTH_16) ? 16 : 8,
+ (chip->options & NAND_BUSWIDTH_16) ? 16 : 8,
busw ? 16 : 8);
return ERR_PTR(-EINVAL);
}
/* Calculate the address shift from the page size */
- this->page_shift = ffs(mtd->writesize) - 1;
+ chip->page_shift = ffs(mtd->writesize) - 1;
/* Convert chipsize to number of pages per chip -1. */
- this->pagemask = (this->chipsize >> this->page_shift) - 1;
+ chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
- this->bbt_erase_shift = this->phys_erase_shift =
+ chip->bbt_erase_shift = chip->phys_erase_shift =
ffs(mtd->erasesize) - 1;
- this->chip_shift = ffs(this->chipsize) - 1;
+ chip->chip_shift = ffs(chip->chipsize) - 1;
/* Set the bad block position */
- this->badblockpos = mtd->writesize > 512 ?
+ chip->badblockpos = mtd->writesize > 512 ?
NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS;
/* Get chip options, preserve non chip based options */
- this->options &= ~NAND_CHIPOPTIONS_MSK;
- this->options |= nand_flash_ids[i].options & NAND_CHIPOPTIONS_MSK;
+ chip->options &= ~NAND_CHIPOPTIONS_MSK;
+ chip->options |= type->options & NAND_CHIPOPTIONS_MSK;
/*
- * Set this as a default. Board drivers can override it, if necessary
+ * Set chip as a default. Board drivers can override it, if necessary
*/
- this->options |= NAND_NO_AUTOINCR;
+ chip->options |= NAND_NO_AUTOINCR;
- /* Check if this is a not a samsung device. Do not clear the
+ /* Check if chip is a not a samsung device. Do not clear the
* options for chips which are not having an extended id.
*/
- if (*maf_id != NAND_MFR_SAMSUNG && !nand_flash_ids[i].pagesize)
- this->options &= ~NAND_SAMSUNG_LP_OPTIONS;
+ if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize)
+ chip->options &= ~NAND_SAMSUNG_LP_OPTIONS;
/* Check for AND chips with 4 page planes */
- if (this->options & NAND_4PAGE_ARRAY)
- this->erase_cmd = multi_erase_cmd;
+ if (chip->options & NAND_4PAGE_ARRAY)
+ chip->erase_cmd = multi_erase_cmd;
else
- this->erase_cmd = single_erase_cmd;
+ chip->erase_cmd = single_erase_cmd;
/* Do not replace user supplied command function ! */
- if (mtd->writesize > 512 && this->cmdfunc == nand_command)
- this->cmdfunc = nand_command_lp;
+ if (mtd->writesize > 512 && chip->cmdfunc == nand_command)
+ chip->cmdfunc = nand_command_lp;
printk(KERN_INFO "NAND device: Manufacturer ID:"
" 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id,
* This fills out all the uninitialized function pointers
* with the defaults.
* The flash ID is read and the mtd/chip structures are
- * filled with the appropriate values. Buffers are allocated if
- * they are not provided by the board driver
+ * filled with the appropriate values.
* The mtd->owner field must be set to the module of the caller
*
*/
int nand_scan(struct mtd_info *mtd, int maxchips)
{
int i, busw, nand_maf_id;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
struct nand_flash_dev *type;
/* Many callers got this wrong, so check for it for a while... */
}
/* Get buswidth to select the correct functions */
- busw = this->options & NAND_BUSWIDTH_16;
+ busw = chip->options & NAND_BUSWIDTH_16;
/* Set the default functions */
- nand_set_defaults(this, busw);
+ nand_set_defaults(chip, busw);
/* Read the flash type */
- type = nand_get_flash_type(mtd, this, busw, &nand_maf_id);
+ type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id);
if (IS_ERR(type)) {
printk(KERN_WARNING "No NAND device found!!!\n");
- this->select_chip(mtd, -1);
+ chip->select_chip(mtd, -1);
return PTR_ERR(type);
}
/* Check for a chip array */
for (i = 1; i < maxchips; i++) {
- this->select_chip(mtd, i);
+ chip->select_chip(mtd, i);
/* Send the command for reading device ID */
- this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
+ chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
/* Read manufacturer and device IDs */
- if (nand_maf_id != this->read_byte(mtd) ||
- type->id != this->read_byte(mtd))
+ if (nand_maf_id != chip->read_byte(mtd) ||
+ type->id != chip->read_byte(mtd))
break;
}
if (i > 1)
printk(KERN_INFO "%d NAND chips detected\n", i);
/* Store the number of chips and calc total size for mtd */
- this->numchips = i;
- mtd->size = i * this->chipsize;
-
- /* Allocate buffers and data structures */
- if (nand_allocate_kmem(mtd, this))
- return -ENOMEM;
+ chip->numchips = i;
+ mtd->size = i * chip->chipsize;
- /* Preset the internal oob buffer */
- memset(this->oob_buf, 0xff,
- mtd->oobsize << (this->phys_erase_shift - this->page_shift));
+ /* Preset the internal oob write buffer */
+ memset(chip->buffers.oobwbuf, 0xff, mtd->oobsize);
/*
* If no default placement scheme is given, select an appropriate one
*/
- if (!this->autooob) {
+ if (!chip->ecc.layout) {
switch (mtd->oobsize) {
case 8:
- this->autooob = &nand_oob_8;
+ chip->ecc.layout = &nand_oob_8;
break;
case 16:
- this->autooob = &nand_oob_16;
+ chip->ecc.layout = &nand_oob_16;
break;
case 64:
- this->autooob = &nand_oob_64;
+ chip->ecc.layout = &nand_oob_64;
break;
default:
printk(KERN_WARNING "No oob scheme defined for "
}
/*
- * The number of bytes available for the filesystem to place fs
- * dependend oob data
- */
- mtd->oobavail = 0;
- for (i = 0; this->autooob->oobfree[i][1]; i++)
- mtd->oobavail += this->autooob->oobfree[i][1];
-
- /*
* check ECC mode, default to software if 3byte/512byte hardware ECC is
* selected and we have 256 byte pagesize fallback to software ECC
*/
- switch (this->ecc.mode) {
+ switch (chip->ecc.mode) {
case NAND_ECC_HW:
+ /* Use standard hwecc read page function ? */
+ if (!chip->ecc.read_page)
+ chip->ecc.read_page = nand_read_page_hwecc;
+ if (!chip->ecc.write_page)
+ chip->ecc.write_page = nand_write_page_hwecc;
+
case NAND_ECC_HW_SYNDROME:
- if (!this->ecc.calculate || !this->ecc.correct ||
- !this->ecc.hwctl) {
+ if (!chip->ecc.calculate || !chip->ecc.correct ||
+ !chip->ecc.hwctl) {
printk(KERN_WARNING "No ECC functions supplied, "
"Hardware ECC not possible\n");
BUG();
}
- if (mtd->writesize >= this->ecc.size)
+ /* Use standard syndrome read/write page function ? */
+ if (!chip->ecc.read_page)
+ chip->ecc.read_page = nand_read_page_syndrome;
+ if (!chip->ecc.write_page)
+ chip->ecc.write_page = nand_write_page_syndrome;
+
+ if (mtd->writesize >= chip->ecc.size)
break;
printk(KERN_WARNING "%d byte HW ECC not possible on "
"%d byte page size, fallback to SW ECC\n",
- this->ecc.size, mtd->writesize);
- this->ecc.mode = NAND_ECC_SOFT;
+ chip->ecc.size, mtd->writesize);
+ chip->ecc.mode = NAND_ECC_SOFT;
case NAND_ECC_SOFT:
- this->ecc.calculate = nand_calculate_ecc;
- this->ecc.correct = nand_correct_data;
- this->ecc.size = 256;
- this->ecc.bytes = 3;
+ chip->ecc.calculate = nand_calculate_ecc;
+ chip->ecc.correct = nand_correct_data;
+ chip->ecc.read_page = nand_read_page_swecc;
+ chip->ecc.write_page = nand_write_page_swecc;
+ chip->ecc.size = 256;
+ chip->ecc.bytes = 3;
break;
case NAND_ECC_NONE:
printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. "
"This is not recommended !!\n");
- this->ecc.size = mtd->writesize;
- this->ecc.bytes = 0;
+ chip->ecc.read_page = nand_read_page_raw;
+ chip->ecc.write_page = nand_write_page_raw;
+ chip->ecc.size = mtd->writesize;
+ chip->ecc.bytes = 0;
break;
default:
printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n",
- this->ecc.mode);
+ chip->ecc.mode);
BUG();
}
/*
+ * The number of bytes available for a client to place data into
+ * the out of band area
+ */
+ chip->ecc.layout->oobavail = 0;
+ for (i = 0; chip->ecc.layout->oobfree[i].length; i++)
+ chip->ecc.layout->oobavail +=
+ chip->ecc.layout->oobfree[i].length;
+
+ /*
* Set the number of read / write steps for one page depending on ECC
* mode
*/
- this->ecc.steps = mtd->writesize / this->ecc.size;
- if(this->ecc.steps * this->ecc.size != mtd->writesize) {
+ chip->ecc.steps = mtd->writesize / chip->ecc.size;
+ if(chip->ecc.steps * chip->ecc.size != mtd->writesize) {
printk(KERN_WARNING "Invalid ecc parameters\n");
BUG();
}
+ chip->ecc.total = chip->ecc.steps * chip->ecc.bytes;
- /* Initialize state, waitqueue and spinlock */
- this->state = FL_READY;
- init_waitqueue_head(&this->controller->wq);
- spin_lock_init(&this->controller->lock);
+ /* Initialize state */
+ chip->state = FL_READY;
/* De-select the device */
- this->select_chip(mtd, -1);
+ chip->select_chip(mtd, -1);
/* Invalidate the pagebuffer reference */
- this->pagebuf = -1;
+ chip->pagebuf = -1;
/* Fill in remaining MTD driver data */
mtd->type = MTD_NANDFLASH;
mtd->block_isbad = nand_block_isbad;
mtd->block_markbad = nand_block_markbad;
- /* and make the autooob the default one */
- memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo));
+ /* propagate ecc.layout to mtd_info */
+ mtd->ecclayout = chip->ecc.layout;
/* Check, if we should skip the bad block table scan */
- if (this->options & NAND_SKIP_BBTSCAN)
+ if (chip->options & NAND_SKIP_BBTSCAN)
return 0;
/* Build bad block table */
- return this->scan_bbt(mtd);
+ return chip->scan_bbt(mtd);
}
/**
*/
void nand_release(struct mtd_info *mtd)
{
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *chip = mtd->priv;
#ifdef CONFIG_MTD_PARTITIONS
/* Deregister partitions */
del_mtd_device(mtd);
/* Free bad block table memory */
- kfree(this->bbt);
- /* Free buffers */
- nand_free_kmem(this);
+ kfree(chip->bbt);
}
EXPORT_SYMBOL_GPL(nand_scan);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff