* This is the generic MTD driver for NAND flash devices. It should be
* capable of working with almost all NAND chips currently available.
* Basic support for AG-AND chips is provided.
- *
+ *
* Additional technical information is available on
* http://www.linux-mtd.infradead.org/tech/nand.html
- *
+ *
* Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
* 2002 Thomas Gleixner (tglx@linutronix.de)
*
- * 02-08-2004 tglx: support for strange chips, which cannot auto increment
+ * 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
* 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
*
* 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
+ * 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
+ * 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
+ * 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
+ * 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:
- * David Woodhouse for adding multichip support
- *
+ * David Woodhouse for adding multichip support
+ *
* Aleph One Ltd. and Toby Churchill Ltd. for supporting the
* rework for 2K page size chips
*
* 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 1.137 2005/03/24 14:33:22 dedekind Exp $
+ * $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
*
*/
+#include <linux/module.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/mtd/compatmac.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
+#include <linux/leds.h>
#include <asm/io.h>
#ifdef CONFIG_MTD_PARTITIONS
.useecc = MTD_NANDECC_AUTOPLACE,
.eccbytes = 3,
.eccpos = {0, 1, 2},
- .oobfree = { {3, 2}, {6, 2} }
+ .oobfree = {{3, 2}, {6, 2}}
};
static struct nand_oobinfo nand_oob_16 = {
.useecc = MTD_NANDECC_AUTOPLACE,
.eccbytes = 6,
.eccpos = {0, 1, 2, 3, 6, 7},
- .oobfree = { {8, 8} }
+ .oobfree = {{8, 8}}
};
static struct nand_oobinfo nand_oob_64 = {
.useecc = MTD_NANDECC_AUTOPLACE,
.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} }
+ 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}}
};
/* This is used for padding purposes in nand_write_oob */
static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len);
static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len);
-static int nand_read (struct mtd_info *mtd, loff_t from, size_t len, size_t * retlen, u_char * buf);
-static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
- size_t * retlen, u_char * buf, u_char * eccbuf, struct nand_oobinfo *oobsel);
-static int nand_read_oob (struct mtd_info *mtd, loff_t from, size_t len, size_t * retlen, u_char * buf);
-static int nand_write (struct mtd_info *mtd, loff_t to, size_t len, size_t * retlen, const u_char * buf);
-static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
- size_t * retlen, const u_char * buf, u_char * eccbuf, struct nand_oobinfo *oobsel);
-static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len, size_t * retlen, const u_char *buf);
-static int nand_writev (struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t * retlen);
-static int nand_writev_ecc (struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t * retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
-static int nand_erase (struct mtd_info *mtd, struct erase_info *instr);
-static void nand_sync (struct mtd_info *mtd);
+static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
+static int nand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
+static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
+static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
+static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
+static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
+static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen);
+static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
+ unsigned long count, loff_t to, size_t *retlen, u_char *eccbuf,
+ struct nand_oobinfo *oobsel);
+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, u_char *oob_buf,
- struct nand_oobinfo *oobsel, int mode);
+static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page, u_char * 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,
- u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode);
+static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages,
+ u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode);
#else
#define nand_verify_pages(...) (0)
#endif
-
-static void nand_get_device (struct nand_chip *this, struct mtd_info *mtd, int new_state);
+
+static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state);
/**
* nand_release_device - [GENERIC] release chip
* @mtd: MTD device structure
- *
- * Deselect, release chip lock and wake up anyone waiting on the device
+ *
+ * Deselect, release chip lock and wake up anyone waiting on the device
*/
-static void nand_release_device (struct mtd_info *mtd)
+static void nand_release_device(struct mtd_info *mtd)
{
struct nand_chip *this = mtd->priv;
/* De-select the NAND device */
this->select_chip(mtd, -1);
- /* Do we have a hardware controller ? */
+
if (this->controller) {
+ /* 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);
+ } else {
+ /* Release the chip */
+ spin_lock(&this->chip_lock);
+ this->state = FL_READY;
+ wake_up(&this->wq);
+ spin_unlock(&this->chip_lock);
}
- /* Release the chip */
- spin_lock (&this->chip_lock);
- this->state = FL_READY;
- wake_up (&this->wq);
- spin_unlock (&this->chip_lock);
}
/**
* nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip
* @mtd: MTD device structure
*
- * Default read function for 16bit buswith with
+ * Default read function for 16bit buswith with
* endianess conversion
*/
static u_char nand_read_byte16(struct mtd_info *mtd)
* nand_read_word - [DEFAULT] read one word from the chip
* @mtd: MTD device structure
*
- * Default read function for 16bit buswith without
+ * Default read function for 16bit buswith without
* endianess conversion
*/
static u16 nand_read_word(struct mtd_info *mtd)
* @mtd: MTD device structure
* @word: data word to write
*
- * Default write function for 16bit buswith without
+ * Default write function for 16bit buswith without
* endianess conversion
*/
static void nand_write_word(struct mtd_info *mtd, u16 word)
static void nand_select_chip(struct mtd_info *mtd, int chip)
{
struct nand_chip *this = mtd->priv;
- switch(chip) {
+ switch (chip) {
case -1:
- this->hwcontrol(mtd, NAND_CTL_CLRNCE);
+ this->hwcontrol(mtd, NAND_CTL_CLRNCE);
break;
case 0:
this->hwcontrol(mtd, NAND_CTL_SETNCE);
int i;
struct nand_chip *this = mtd->priv;
- for (i=0; i<len; i++)
+ for (i = 0; i < len; i++)
writeb(buf[i], this->IO_ADDR_W);
}
/**
- * nand_read_buf - [DEFAULT] read chip data into buffer
+ * nand_read_buf - [DEFAULT] read chip data into buffer
* @mtd: MTD device structure
* @buf: buffer to store date
* @len: number of bytes to read
int i;
struct nand_chip *this = mtd->priv;
- for (i=0; i<len; i++)
+ for (i = 0; i < len; i++)
buf[i] = readb(this->IO_ADDR_R);
}
/**
- * nand_verify_buf - [DEFAULT] Verify chip data against buffer
+ * nand_verify_buf - [DEFAULT] Verify chip data against buffer
* @mtd: MTD device structure
* @buf: buffer containing the data to compare
* @len: number of bytes to compare
int i;
struct nand_chip *this = mtd->priv;
- for (i=0; i<len; i++)
+ for (i = 0; i < len; i++)
if (buf[i] != readb(this->IO_ADDR_R))
return -EFAULT;
struct nand_chip *this = mtd->priv;
u16 *p = (u16 *) buf;
len >>= 1;
-
- for (i=0; i<len; i++)
+
+ for (i = 0; i < len; i++)
writew(p[i], this->IO_ADDR_W);
-
+
}
/**
- * nand_read_buf16 - [DEFAULT] read chip data into buffer
+ * nand_read_buf16 - [DEFAULT] read chip data into buffer
* @mtd: MTD device structure
* @buf: buffer to store date
* @len: number of bytes to read
u16 *p = (u16 *) buf;
len >>= 1;
- for (i=0; i<len; i++)
+ for (i = 0; i < len; i++)
p[i] = readw(this->IO_ADDR_R);
}
/**
- * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer
+ * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer
* @mtd: MTD device structure
* @buf: buffer containing the data to compare
* @len: number of bytes to compare
u16 *p = (u16 *) buf;
len >>= 1;
- for (i=0; i<len; i++)
+ for (i = 0; i < len; i++)
if (p[i] != readw(this->IO_ADDR_R))
return -EFAULT;
* @ofs: offset from device start
* @getchip: 0, if the chip is already selected
*
- * Check, if the block is bad.
+ * Check, if the block is bad.
*/
static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
{
chipnr = (int)(ofs >> this->chip_shift);
/* Grab the lock and see if the device is available */
- nand_get_device (this, mtd, FL_READING);
+ nand_get_device(this, mtd, FL_READING);
/* Select the NAND device */
this->select_chip(mtd, chipnr);
- } else
- page = (int) ofs;
+ } else
+ page = (int)ofs;
if (this->options & NAND_BUSWIDTH_16) {
- this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page & this->pagemask);
+ this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page & this->pagemask);
bad = cpu_to_le16(this->read_word(mtd));
if (this->badblockpos & 0x1)
- bad >>= 1;
+ bad >>= 8;
if ((bad & 0xFF) != 0xff)
res = 1;
} else {
- this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos, page & this->pagemask);
+ this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos, page & this->pagemask);
if (this->read_byte(mtd) != 0xff)
res = 1;
}
-
+
if (getchip) {
/* Deselect and wake up anyone waiting on the device */
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;
- u_char buf[2] = {0, 0};
- size_t retlen;
+ u_char buf[2] = { 0, 0 };
+ size_t retlen;
int block;
-
+
/* Get block number */
- block = ((int) ofs) >> this->bbt_erase_shift;
+ block = ((int)ofs) >> this->bbt_erase_shift;
if (this->bbt)
this->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);
-
+ return nand_update_bbt(mtd, ofs);
+
/* 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);
+ return nand_write_oob(mtd, ofs, 2, &retlen, buf);
}
-/**
+/**
* nand_check_wp - [GENERIC] check if the chip is write protected
* @mtd: MTD device structure
- * Check, if the device is write protected
+ * Check, if the device is write protected
*
- * The function expects, that the device is already selected
+ * The function expects, that the device is already selected
*/
-static int nand_check_wp (struct mtd_info *mtd)
+static int nand_check_wp(struct mtd_info *mtd)
{
struct nand_chip *this = mtd->priv;
/* Check the WP bit */
- this->cmdfunc (mtd, NAND_CMD_STATUS, -1, -1);
- return (this->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1;
+ this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
+ return (this->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1;
}
/**
* Check, if the block is bad. Either by reading the bad block table or
* calling of the scan function.
*/
-static int nand_block_checkbad (struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt)
+static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt)
{
struct nand_chip *this = mtd->priv;
-
+
if (!this->bbt)
return this->block_bad(mtd, ofs, getchip);
-
+
/* Return info from the table */
- return nand_isbad_bbt (mtd, ofs, allowbbt);
+ 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;
- unsigned long timeo = jiffies + 2;
+ 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))
- return;
- } while (time_before(jiffies, timeo));
+ break;
+ touch_softlockup_watchdog();
+ } while (time_before(jiffies, timeo));
+ led_trigger_event(nand_led_trigger, LED_OFF);
}
/**
* Send command to NAND device. This function is used for small page
* devices (256/512 Bytes per page)
*/
-static void nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
+static void nand_command(struct mtd_info *mtd, unsigned command, int column, int page_addr)
{
register struct nand_chip *this = mtd->priv;
if (command == NAND_CMD_SEQIN) {
int readcmd;
- if (column >= mtd->oobblock) {
+ if (column >= mtd->writesize) {
/* OOB area */
- column -= mtd->oobblock;
+ column -= mtd->writesize;
readcmd = NAND_CMD_READOOB;
} else if (column < 256) {
/* First 256 bytes --> READ0 */
this->write_byte(mtd, column);
}
if (page_addr != -1) {
- this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
- this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
+ this->write_byte(mtd, (unsigned char)(page_addr & 0xff));
+ this->write_byte(mtd, (unsigned char)((page_addr >> 8) & 0xff));
/* One more address cycle for devices > 32MiB */
if (this->chipsize > (32 << 20))
- this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
+ this->write_byte(mtd, (unsigned char)((page_addr >> 16) & 0x0f));
}
/* Latch in address */
this->hwcontrol(mtd, NAND_CTL_CLRALE);
}
-
- /*
- * program and erase have their own busy handlers
+
+ /*
+ * program and erase have their own busy handlers
* status and sequential in needs no delay
- */
+ */
switch (command) {
-
+
case NAND_CMD_PAGEPROG:
case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
return;
case NAND_CMD_RESET:
- if (this->dev_ready)
+ if (this->dev_ready)
break;
udelay(this->chip_delay);
this->hwcontrol(mtd, NAND_CTL_SETCLE);
this->write_byte(mtd, NAND_CMD_STATUS);
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
- while ( !(this->read_byte(mtd) & NAND_STATUS_READY));
+ while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ;
return;
- /* This applies to read commands */
+ /* 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);
+ udelay(this->chip_delay);
return;
- }
+ }
}
/* Apply this short delay always to ensure that we do wait tWB in
* any case on any machine. */
- ndelay (100);
+ ndelay(100);
nand_wait_ready(mtd);
}
* @page_addr: the page address for this command, -1 if none
*
* Send command to NAND device. This is the version for the new large page devices
- * We dont have the seperate regions as we have in the small page devices.
+ * We dont have the separate regions as we have in the small page devices.
* We must emulate NAND_CMD_READOOB to keep the code compatible.
*
*/
-static void nand_command_lp (struct mtd_info *mtd, unsigned command, int column, int page_addr)
+static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column, int page_addr)
{
register struct nand_chip *this = mtd->priv;
/* Emulate NAND_CMD_READOOB */
if (command == NAND_CMD_READOOB) {
- column += mtd->oobblock;
+ column += mtd->writesize;
command = NAND_CMD_READ0;
}
-
-
+
/* Begin command latch cycle */
this->hwcontrol(mtd, NAND_CTL_SETCLE);
/* Write out the command to the device. */
column >>= 1;
this->write_byte(mtd, column & 0xff);
this->write_byte(mtd, column >> 8);
- }
+ }
if (page_addr != -1) {
- this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
- this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
+ this->write_byte(mtd, (unsigned char)(page_addr & 0xff));
+ this->write_byte(mtd, (unsigned char)((page_addr >> 8) & 0xff));
/* One more address cycle for devices > 128MiB */
if (this->chipsize > (128 << 20))
- this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0xff));
+ this->write_byte(mtd, (unsigned char)((page_addr >> 16) & 0xff));
}
/* Latch in address */
this->hwcontrol(mtd, NAND_CTL_CLRALE);
}
-
- /*
- * program and erase have their own busy handlers
+
+ /*
+ * program and erase have their own busy handlers
* status, sequential in, and deplete1 need no delay
*/
switch (command) {
-
+
case NAND_CMD_CACHEDPROG:
case NAND_CMD_PAGEPROG:
case NAND_CMD_ERASE1:
case NAND_CMD_DEPLETE1:
return;
- /*
- * read error status commands require only a short delay
- */
+ /*
+ * read error status commands require only a short delay
+ */
case NAND_CMD_STATUS_ERROR:
case NAND_CMD_STATUS_ERROR0:
case NAND_CMD_STATUS_ERROR1:
return;
case NAND_CMD_RESET:
- if (this->dev_ready)
+ if (this->dev_ready)
break;
udelay(this->chip_delay);
this->hwcontrol(mtd, NAND_CTL_SETCLE);
this->write_byte(mtd, NAND_CMD_STATUS);
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
- while ( !(this->read_byte(mtd) & NAND_STATUS_READY));
+ while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ;
return;
case NAND_CMD_READ0:
/* End command latch cycle */
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
/* Fall through into ready check */
-
- /* This applies to read commands */
+
+ /* 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);
+ udelay(this->chip_delay);
return;
- }
+ }
}
/* Apply this short delay always to ensure that we do wait tWB in
* any case on any machine. */
- ndelay (100);
+ ndelay(100);
nand_wait_ready(mtd);
}
* nand_get_device - [GENERIC] Get chip for selected access
* @this: the nand chip descriptor
* @mtd: MTD device structure
- * @new_state: the state which is requested
+ * @new_state: the state which is requested
*
* Get the device and lock it for exclusive access
*/
-static void nand_get_device (struct nand_chip *this, struct mtd_info *mtd, int new_state)
+static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state)
{
- struct nand_chip *active = this;
+ struct nand_chip *active;
+ spinlock_t *lock;
+ wait_queue_head_t *wq;
+ DECLARE_WAITQUEUE(wait, current);
- DECLARE_WAITQUEUE (wait, current);
+ lock = (this->controller) ? &this->controller->lock : &this->chip_lock;
+ wq = (this->controller) ? &this->controller->wq : &this->wq;
+ retry:
+ active = this;
+ spin_lock(lock);
- /*
- * Grab the lock and see if the device is available
- */
-retry:
/* Hardware controller shared among independend devices */
if (this->controller) {
- spin_lock (&this->controller->lock);
if (this->controller->active)
active = this->controller->active;
else
this->controller->active = this;
- spin_unlock (&this->controller->lock);
}
-
- if (active == this) {
- spin_lock (&this->chip_lock);
- if (this->state == FL_READY) {
- this->state = new_state;
- spin_unlock (&this->chip_lock);
- return;
- }
- }
- set_current_state (TASK_UNINTERRUPTIBLE);
- add_wait_queue (&active->wq, &wait);
- spin_unlock (&active->chip_lock);
- schedule ();
- remove_wait_queue (&active->wq, &wait);
+ if (active == this && this->state == FL_READY) {
+ this->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;
+ }
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ add_wait_queue(wq, &wait);
+ spin_unlock(lock);
+ schedule();
+ remove_wait_queue(wq, &wait);
goto retry;
}
* @state: state to select the max. timeout value
*
* Wait for command done. This applies to erase and program only
- * Erase can take up to 400ms and program up to 20ms according to
+ * Erase can take up to 400ms and program up to 20ms according to
* general NAND and SmartMedia specs
*
*/
static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
{
- unsigned long timeo = jiffies;
- int status;
-
+ unsigned long timeo = jiffies;
+ int status;
+
if (state == FL_ERASING)
- timeo += (HZ * 400) / 1000;
+ timeo += (HZ * 400) / 1000;
else
- timeo += (HZ * 20) / 1000;
+ timeo += (HZ * 20) / 1000;
+
+ led_trigger_event(nand_led_trigger, LED_FULL);
/* Apply this short delay always to ensure that we do wait tWB in
* any case on any machine. */
- ndelay (100);
+ ndelay(100);
if ((state == FL_ERASING) && (this->options & NAND_IS_AND))
- this->cmdfunc (mtd, NAND_CMD_STATUS_MULTI, -1, -1);
- else
- this->cmdfunc (mtd, NAND_CMD_STATUS, -1, -1);
+ this->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1);
+ else
+ this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
- while (time_before(jiffies, timeo)) {
+ while (time_before(jiffies, timeo)) {
/* Check, if we were interrupted */
if (this->state != state)
return 0;
if (this->dev_ready) {
if (this->dev_ready(mtd))
- break;
+ break;
} else {
if (this->read_byte(mtd) & NAND_STATUS_READY)
break;
}
cond_resched();
}
- status = (int) this->read_byte(mtd);
+ led_trigger_event(nand_led_trigger, LED_OFF);
+
+ status = (int)this->read_byte(mtd);
return status;
}
*
* Cached programming is not supported yet.
*/
-static int nand_write_page (struct mtd_info *mtd, struct nand_chip *this, int page,
- u_char *oob_buf, struct nand_oobinfo *oobsel, int cached)
+static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page,
+ u_char *oob_buf, struct nand_oobinfo *oobsel, int cached)
{
- int i, status;
- u_char ecc_code[oobsel->eccbytes];
- int eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE;
- int *oob_config = oobsel->eccpos;
- int datidx = 0, eccidx = 0, eccsteps = this->eccsteps;
- int eccbytes = 0;
-
+ int i, status;
+ u_char ecc_code[32];
+ int eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE;
+ int *oob_config = oobsel->eccpos;
+ int datidx = 0, eccidx = 0, eccsteps = this->eccsteps;
+ int eccbytes = 0;
+
/* FIXME: Enable cached programming */
cached = 0;
-
+
/* Send command to begin auto page programming */
- this->cmdfunc (mtd, NAND_CMD_SEQIN, 0x00, page);
+ this->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
/* Write out complete page of data, take care of eccmode */
switch (eccmode) {
- /* No ecc, write all */
+ /* 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->oobblock);
+ printk(KERN_WARNING "Writing data without ECC to NAND-FLASH is not recommended\n");
+ this->write_buf(mtd, this->data_poi, mtd->writesize);
break;
-
- /* Software ecc 3/256, write all */
+
+ /* Software ecc 3/256, write all */
case NAND_ECC_SOFT:
for (; eccsteps; eccsteps--) {
this->calculate_ecc(mtd, &this->data_poi[datidx], ecc_code);
oob_buf[oob_config[eccidx]] = ecc_code[i];
datidx += this->eccsize;
}
- this->write_buf(mtd, this->data_poi, mtd->oobblock);
+ this->write_buf(mtd, this->data_poi, mtd->writesize);
break;
default:
eccbytes = this->eccbytes;
}
break;
}
-
+
/* Write out OOB data */
if (this->options & NAND_HWECC_SYNDROME)
this->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes);
- else
+ else
this->write_buf(mtd, oob_buf, mtd->oobsize);
/* Send command to actually program the data */
- this->cmdfunc (mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1);
+ this->cmdfunc(mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1);
if (!cached) {
/* call wait ready function */
- status = this->waitfunc (mtd, this, FL_WRITING);
+ status = this->waitfunc(mtd, this, FL_WRITING);
/* See if operation failed and additional status checks are available */
if ((status & NAND_STATUS_FAIL) && (this->errstat)) {
/* See if device thinks it succeeded */
if (status & NAND_STATUS_FAIL) {
- DEBUG (MTD_DEBUG_LEVEL0, "%s: " "Failed write, page 0x%08x, ", __FUNCTION__, page);
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write, page 0x%08x, ", __FUNCTION__, page);
return -EIO;
}
} else {
/* FIXME: Implement cached programming ! */
- /* wait until cache is ready*/
+ /* wait until cache is ready */
// status = this->waitfunc (mtd, this, FL_CACHEDRPG);
}
- return 0;
+ return 0;
}
#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
* @oobmode: 1 = full buffer verify, 0 = ecc only
*
* 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
+ * 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
+ * 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.
*/
-static int nand_verify_pages (struct mtd_info *mtd, struct nand_chip *this, int page, int numpages,
- u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode)
+static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages,
+ u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode)
{
- int i, j, datidx = 0, oobofs = 0, res = -EIO;
- int eccsteps = this->eccsteps;
- int hweccbytes;
- u_char oobdata[mtd->oobsize];
+ int i, j, datidx = 0, oobofs = 0, res = -EIO;
+ int eccsteps = this->eccsteps;
+ int hweccbytes;
+ u_char 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);
+ this->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
- for(;;) {
+ 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);
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
goto out;
}
datidx += mtd->eccsize;
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);
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
goto out;
}
oobofs += hweccbytes;
*/
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);
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
goto out;
}
} else {
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);
+ 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
+ /* 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);
+ */
+ if (!this->dev_ready)
+ udelay(this->chip_delay);
else
nand_wait_ready(mtd);
/* All done, return happy */
if (!numpages)
return 0;
-
-
- /* Check, if the chip supports auto page increment */
+
+ /* Check, if the chip supports auto page increment */
if (!NAND_CANAUTOINCR(this))
- this->cmdfunc (mtd, NAND_CMD_READ0, 0x00, page);
+ this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
}
- /*
+ /*
* 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);
+ out:
+ this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
return res;
}
#endif
* This function simply calls nand_do_read_ecc with oob buffer and oobsel = NULL
* and flags = 0xff
*/
-static int nand_read (struct mtd_info *mtd, loff_t from, size_t len, size_t * retlen, u_char * buf)
+static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
{
- return nand_do_read_ecc (mtd, from, len, retlen, buf, NULL, NULL, 0xff);
-}
-
+ return nand_do_read_ecc(mtd, from, len, retlen, buf, NULL, &mtd->oobinfo, 0xff);
+}
/**
* nand_read_ecc - [MTD Interface] MTD compability function for nand_do_read_ecc
*
* This function simply calls nand_do_read_ecc with flags = 0xff
*/
-static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
- size_t * retlen, u_char * buf, u_char * oob_buf, struct nand_oobinfo *oobsel)
+static int nand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf, u_char *oob_buf, struct nand_oobinfo *oobsel)
{
+ /* use userspace supplied oobinfo, if zero */
+ if (oobsel == NULL)
+ oobsel = &mtd->oobinfo;
return nand_do_read_ecc(mtd, from, len, retlen, buf, oob_buf, oobsel, 0xff);
}
-
/**
* nand_do_read_ecc - [MTD Interface] Read data with ECC
* @mtd: MTD device structure
* @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
+ * @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:
*
* NAND read with ECC
*/
-int nand_do_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
- size_t * retlen, u_char * buf, u_char * oob_buf,
- struct nand_oobinfo *oobsel, int flags)
+int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf, u_char *oob_buf, struct nand_oobinfo *oobsel, int flags)
{
+
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;
u_char *data_poi, *oob_data = oob_buf;
- u_char ecc_calc[oobsel->eccbytes];
- u_char ecc_code[oobsel->eccbytes];
- 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;
-
+ u_char ecc_calc[32];
+ u_char 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);
+ DEBUG(MTD_DEBUG_LEVEL3, "nand_read_ecc: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len);
/* 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");
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: Attempt read beyond end of device\n");
*retlen = 0;
return -EINVAL;
}
/* Grab the lock and see if the device is available */
if (flags & NAND_GET_DEVICE)
- nand_get_device (this, mtd, FL_READING);
+ nand_get_device(this, mtd, FL_READING);
- /* use userspace supplied oobinfo, if zero */
- if (oobsel == NULL)
- oobsel = &mtd->oobinfo;
-
/* Autoplace of oob data ? Use the default placement scheme */
if (oobsel->useecc == MTD_NANDECC_AUTOPLACE)
oobsel = this->autooob;
-
+
eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE;
oob_config = oobsel->eccpos;
this->select_chip(mtd, chipnr);
/* First we calculate the starting page */
- realpage = (int) (from >> this->page_shift);
+ realpage = (int)(from >> this->page_shift);
page = realpage & this->pagemask;
/* Get raw starting column */
- col = from & (mtd->oobblock - 1);
+ col = from & (mtd->writesize - 1);
- end = mtd->oobblock;
+ end = mtd->writesize;
ecc = this->eccsize;
eccbytes = this->eccbytes;
-
+
if ((eccmode == NAND_ECC_NONE) || (this->options & NAND_HWECC_SYNDROME))
compareecc = 0;
oobreadlen = mtd->oobsize;
- if (this->options & NAND_HWECC_SYNDROME)
+ if (this->options & NAND_HWECC_SYNDROME)
oobreadlen -= oobsel->eccbytes;
/* Loop until all data read */
while (read < len) {
-
+
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
+ else
data_poi = this->data_buf;
-
- /* Check, if we have this page in the buffer
+
+ /* 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);
+ memcpy(data_poi, this->data_buf, end);
goto readdata;
}
/* Check, if we must send the read command */
if (sndcmd) {
- this->cmdfunc (mtd, NAND_CMD_READ0, 0x00, page);
+ this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
sndcmd = 0;
- }
+ }
/* get oob area, if we have no oob buffer from fs-driver */
- if (!oob_buf || oobsel->useecc == MTD_NANDECC_AUTOPLACE)
+ if (!oob_buf || oobsel->useecc == MTD_NANDECC_AUTOPLACE ||
+ oobsel->useecc == MTD_NANDECC_AUTOPL_USR)
oob_data = &this->data_buf[end];
eccsteps = this->eccsteps;
-
+
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;
+ 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;
}
- this->read_buf(mtd, data_poi, end);
- break;
- }
-
+
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)
+ for (i = 0, datidx = 0; eccsteps; eccsteps--, i += 3, datidx += ecc)
this->calculate_ecc(mtd, &data_poi[datidx], &ecc_calc[i]);
- break;
+ break;
default:
- for (i = 0, datidx = 0; eccsteps; eccsteps--, i+=eccbytes, datidx += ecc) {
+ for (i = 0, datidx = 0; eccsteps; eccsteps--, i += eccbytes, datidx += ecc) {
this->enable_hwecc(mtd, NAND_ECC_READ);
this->read_buf(mtd, &data_poi[datidx], ecc);
* does the error correction on the fly */
ecc_status = this->correct_data(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);
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: "
+ "Failed ECC read, page 0x%08x on chip %d\n", page, chipnr);
ecc_failed++;
}
} else {
this->calculate_ecc(mtd, &data_poi[datidx], &ecc_calc[i]);
- }
+ }
}
- break;
+ break;
}
/* read oobdata */
/* Skip ECC check, if not requested (ECC_NONE or HW_ECC with syndromes) */
if (!compareecc)
- goto readoob;
-
+ goto readoob;
+
/* Pick the ECC bytes out of the oob data */
for (j = 0; j < oobsel->eccbytes; j++)
ecc_code[j] = oob_data[oob_config[j]];
- /* correct data, if neccecary */
+ /* correct data, if necessary */
for (i = 0, j = 0, datidx = 0; i < this->eccsteps; i++, datidx += ecc) {
ecc_status = this->correct_data(mtd, &data_poi[datidx], &ecc_code[j], &ecc_calc[j]);
-
+
/* Get next chunk of ecc bytes */
j += eccbytes;
-
- /* Check, if we have a fs supplied oob-buffer,
+
+ /* 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) {
+ if (oob_buf && oobsel->useecc == MTD_NANDECC_PLACE) {
int *p = (int *)(&oob_data[mtd->oobsize]);
p[i] = ecc_status;
}
-
- if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) {
- DEBUG (MTD_DEBUG_LEVEL0, "nand_read_ecc: " "Failed ECC read, page 0x%08x\n", page);
+
+ 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++;
}
- }
+ }
- readoob:
+ readoob:
/* check, if we have a fs supplied oob-buffer */
if (oob_buf) {
/* without autoplace. Legacy mode used by YAFFS1 */
- switch(oobsel->useecc) {
+ switch (oobsel->useecc) {
case MTD_NANDECC_AUTOPLACE:
+ case MTD_NANDECC_AUTOPL_USR:
/* Walk through the autoplace chunks */
- for (i = 0, j = 0; j < mtd->oobavail; i++) {
+ 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);
- j+= num;
+ oob += num;
}
- oob += mtd->oobavail;
break;
case MTD_NANDECC_PLACE:
/* YAFFS1 legacy mode */
- oob_data += this->eccsteps * sizeof (int);
+ oob_data += this->eccsteps * sizeof(int);
default:
oob_data += mtd->oobsize;
}
}
readdata:
/* Partial page read, transfer data into fs buffer */
- if (!aligned) {
+ if (!aligned) {
for (j = col; j < end && read < len; j++)
buf[read++] = data_poi[j];
- this->pagebuf = realpage;
- } else
- read += mtd->oobblock;
+ this->pagebuf = realpage;
+ } else
+ read += mtd->writesize;
- /* Apply delay or wait for ready/busy pin
+ /* 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 (!this->dev_ready)
+ udelay(this->chip_delay);
else
nand_wait_ready(mtd);
-
+
if (read == len)
- break;
+ break;
/* For subsequent reads align to page boundary. */
col = 0;
this->select_chip(mtd, -1);
this->select_chip(mtd, chipnr);
}
- /* Check, if the chip supports auto page increment
- * or if we have hit a block boundary.
- */
+ /* Check, if the chip supports auto page increment
+ * or if we have hit a block boundary.
+ */
if (!NAND_CANAUTOINCR(this) || !(page & blockcheck))
- sndcmd = 1;
+ sndcmd = 1;
}
/* Deselect and wake up anyone waiting on the device */
*
* 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, u_char * buf)
+static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
{
int i, col, page, chipnr;
struct nand_chip *this = mtd->priv;
- int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
+ int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
- 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);
/* Shift to get page */
page = (int)(from >> this->page_shift);
chipnr = (int)(from >> this->chip_shift);
-
+
/* Mask to get column */
col = from & (mtd->oobsize - 1);
/* 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");
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: Attempt read beyond end of device\n");
*retlen = 0;
return -EINVAL;
}
/* Grab the lock and see if the device is available */
- nand_get_device (this, mtd , FL_READING);
+ nand_get_device(this, mtd, FL_READING);
/* Select the NAND device */
this->select_chip(mtd, chipnr);
/* Send the read command */
- this->cmdfunc (mtd, NAND_CMD_READOOB, col, page & this->pagemask);
- /*
+ 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 !
*/
thislen = min_t(int, thislen, len);
this->read_buf(mtd, &buf[i], thislen);
i += thislen;
-
- /* 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);
/* Read more ? */
if (i < len) {
this->select_chip(mtd, -1);
this->select_chip(mtd, chipnr);
}
-
- /* Check, if the chip supports auto page increment
- * or if we have hit a block boundary.
- */
+
+ /* 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);
+
+ /* 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);
+ this->cmdfunc(mtd, NAND_CMD_READOOB, 0x0, page & this->pagemask);
}
}
}
*
* Read raw data including oob into buffer
*/
-int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen)
+int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen)
{
struct nand_chip *this = mtd->priv;
- int page = (int) (from >> this->page_shift);
- int chip = (int) (from >> this->chip_shift);
+ int page = (int)(from >> this->page_shift);
+ int chip = (int)(from >> this->chip_shift);
int sndcmd = 1;
int cnt = 0;
- int pagesize = mtd->oobblock + mtd->oobsize;
- int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
+ int pagesize = mtd->writesize + mtd->oobsize;
+ int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
/* 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");
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: 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(this, mtd, FL_READING);
+
+ this->select_chip(mtd, chip);
- this->select_chip (mtd, chip);
-
/* Add requested oob length */
len += ooblen;
-
+
while (len) {
if (sndcmd)
- this->cmdfunc (mtd, NAND_CMD_READ0, 0, page & this->pagemask);
- sndcmd = 0;
+ this->cmdfunc(mtd, NAND_CMD_READ0, 0, page & this->pagemask);
+ sndcmd = 0;
- this->read_buf (mtd, &buf[cnt], pagesize);
+ this->read_buf(mtd, &buf[cnt], pagesize);
len -= pagesize;
cnt += pagesize;
page++;
-
- if (!this->dev_ready)
- udelay (this->chip_delay);
+
+ if (!this->dev_ready)
+ udelay(this->chip_delay);
else
nand_wait_ready(mtd);
-
- /* Check, if the chip supports auto page increment */
+
+ /* Check, if the chip supports auto page increment */
if (!NAND_CANAUTOINCR(this) || !(page & blockcheck))
sndcmd = 1;
}
return 0;
}
-
-/**
- * nand_prepare_oobbuf - [GENERIC] Prepare the out of band buffer
+/**
+ * nand_prepare_oobbuf - [GENERIC] Prepare the out of band buffer
* @mtd: MTD device structure
* @fsbuf: buffer given by fs driver
* @oobsel: out of band selection structre
* forces the 0xff fill before using the buffer again.
*
*/
-static u_char * nand_prepare_oobbuf (struct mtd_info *mtd, u_char *fsbuf, struct nand_oobinfo *oobsel,
- int autoplace, int numpages)
+static u_char *nand_prepare_oobbuf(struct mtd_info *mtd, u_char *fsbuf, struct nand_oobinfo *oobsel,
+ int autoplace, int numpages)
{
struct nand_chip *this = mtd->priv;
int i, len, ofs;
/* Zero copy fs supplied buffer */
- if (fsbuf && !autoplace)
+ if (fsbuf && !autoplace)
return fsbuf;
/* 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));
+ if (this->oobdirty) {
+ memset(this->oob_buf, 0xff, mtd->oobsize << (this->phys_erase_shift - this->page_shift));
this->oobdirty = 0;
- }
-
+ }
+
/* 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;
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);
+ memcpy(&this->oob_buf[to], fsbuf, num);
len += num;
fsbuf += num;
}
return this->oob_buf;
}
-#define NOTALIGNED(x) (x & (mtd->oobblock-1)) != 0
+#define NOTALIGNED(x) (x & (mtd->writesize-1)) != 0
/**
* nand_write - [MTD Interface] compability function for nand_write_ecc
* This function simply calls nand_write_ecc with oob buffer and oobsel = NULL
*
*/
-static int nand_write (struct mtd_info *mtd, loff_t to, size_t len, size_t * retlen, const u_char * buf)
+static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
{
- return (nand_write_ecc (mtd, to, len, retlen, buf, NULL, NULL));
+ return (nand_write_ecc(mtd, to, len, retlen, buf, NULL, NULL));
}
-
+
/**
* nand_write_ecc - [MTD Interface] NAND write with ECC
* @mtd: MTD device structure
*
* NAND write with ECC
*/
-static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
- size_t * retlen, const u_char * buf, u_char * eccbuf, struct nand_oobinfo *oobsel)
+static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf, u_char *eccbuf,
+ struct nand_oobinfo *oobsel)
{
int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr;
int autoplace = 0, numpages, totalpages;
struct nand_chip *this = mtd->priv;
u_char *oobbuf, *bufstart;
- int ppblock = (1 << (this->phys_erase_shift - this->page_shift));
+ int ppblock = (1 << (this->phys_erase_shift - this->page_shift));
- DEBUG (MTD_DEBUG_LEVEL3, "nand_write_ecc: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "nand_write_ecc: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len);
/* Initialize retlen, in case of early exit */
*retlen = 0;
/* Do not allow write past end of device */
if ((to + len) > mtd->size) {
- DEBUG (MTD_DEBUG_LEVEL0, "nand_write_ecc: Attempt to write past end of page\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_ecc: Attempt to write past end of page\n");
return -EINVAL;
}
- /* reject writes, which are not page aligned */
- if (NOTALIGNED (to) || NOTALIGNED(len)) {
- printk (KERN_NOTICE "nand_write_ecc: Attempt to write not page aligned data\n");
+ /* reject writes, which are not page aligned */
+ if (NOTALIGNED(to) || NOTALIGNED(len)) {
+ printk(KERN_NOTICE "nand_write_ecc: 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);
+ nand_get_device(this, mtd, FL_WRITING);
/* Calculate chipnr */
chipnr = (int)(to >> this->chip_shift);
goto out;
/* if oobsel is NULL, use chip defaults */
- if (oobsel == NULL)
- oobsel = &mtd->oobinfo;
-
+ if (oobsel == NULL)
+ oobsel = &mtd->oobinfo;
+
/* 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;
/* Setup variables and oob buffer */
totalpages = len >> this->page_shift;
- page = (int) (to >> 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))
+ 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 = (u_char *)buf;
+ numpages = min(ppblock - (startpage & (ppblock - 1)), totalpages);
+ oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages);
+ bufstart = (u_char *) buf;
/* Loop until all data is written */
while (written < len) {
- this->data_poi = (u_char*) &buf[written];
+ this->data_poi = (u_char *) &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));
+ ret = nand_write_page(mtd, this, page, &oobbuf[oob], oobsel, (--numpages > 0));
if (ret) {
- DEBUG (MTD_DEBUG_LEVEL0, "nand_write_ecc: write_page failed %d\n", ret);
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_ecc: write_page failed %d\n", ret);
goto out;
- }
+ }
/* Next oob page */
oob += mtd->oobsize;
/* Update written bytes count */
- written += mtd->oobblock;
- if (written == len)
+ written += mtd->writesize;
+ if (written == len)
goto cmp;
-
+
/* Increment page address */
page++;
/* 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))){
+ */
+ if (!(page & (ppblock - 1))) {
int ofs;
this->data_poi = bufstart;
- ret = nand_verify_pages (mtd, this, startpage,
- page - startpage,
- oobbuf, oobsel, chipnr, (eccbuf != NULL));
+ ret = nand_verify_pages(mtd, this, startpage, page - startpage,
+ oobbuf, oobsel, chipnr, (eccbuf != NULL));
if (ret) {
- DEBUG (MTD_DEBUG_LEVEL0, "nand_write_ecc: verify_pages failed %d\n", ret);
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_ecc: 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);
+ numpages = min(totalpages, ppblock);
page &= this->pagemask;
startpage = page;
- oobbuf = nand_prepare_oobbuf (mtd, eccbuf, oobsel,
- autoplace, numpages);
+ oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages);
+ oob = 0;
/* Check, if we cross a chip boundary */
if (!page) {
chipnr++;
}
}
/* Verify the remaining pages */
-cmp:
+ cmp:
this->data_poi = bufstart;
- ret = nand_verify_pages (mtd, this, startpage, totalpages,
- oobbuf, oobsel, chipnr, (eccbuf != NULL));
+ ret = nand_verify_pages(mtd, this, startpage, totalpages, oobbuf, oobsel, chipnr, (eccbuf != NULL));
if (!ret)
*retlen = written;
- else
- DEBUG (MTD_DEBUG_LEVEL0, "nand_write_ecc: verify_pages failed %d\n", ret);
+ else
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_ecc: verify_pages failed %d\n", ret);
-out:
+ out:
/* Deselect and wake up anyone waiting on the device */
nand_release_device(mtd);
return ret;
}
-
/**
* nand_write_oob - [MTD Interface] NAND write out-of-band
* @mtd: MTD device structure
*
* NAND write out-of-band
*/
-static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len, size_t * retlen, const u_char * buf)
+static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
{
int column, page, status, ret = -EIO, chipnr;
struct nand_chip *this = mtd->priv;
- DEBUG (MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len);
/* Shift to get page */
- page = (int) (to >> this->page_shift);
- chipnr = (int) (to >> this->chip_shift);
+ page = (int)(to >> this->page_shift);
+ chipnr = (int)(to >> this->chip_shift);
/* Mask to get column */
column = to & (mtd->oobsize - 1);
/* 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");
+ 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);
+ nand_get_device(this, mtd, FL_WRITING);
/* Select the NAND device */
this->select_chip(mtd, chipnr);
/* Check, if it is write protected */
if (nand_check_wp(mtd))
goto out;
-
+
/* 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->oobblock, page & this->pagemask);
+ 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));
+ this->write_buf(mtd, ffchars, mtd->oobsize - (len + column));
} else {
/* Write out desired data */
- this->cmdfunc (mtd, NAND_CMD_SEQIN, mtd->oobblock + column, page & this->pagemask);
+ this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize + column, page & this->pagemask);
/* write data */
this->write_buf(mtd, buf, len);
}
/* Send command to program the OOB data */
- this->cmdfunc (mtd, NAND_CMD_PAGEPROG, -1, -1);
+ this->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
- status = this->waitfunc (mtd, this, FL_WRITING);
+ status = this->waitfunc(mtd, this, 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);
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write, page 0x%08x\n", page);
ret = -EIO;
goto out;
}
#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
/* Send command to read back the data */
- this->cmdfunc (mtd, NAND_CMD_READOOB, column, page & this->pagemask);
+ this->cmdfunc(mtd, NAND_CMD_READOOB, column, page & this->pagemask);
if (this->verify_buf(mtd, buf, len)) {
- DEBUG (MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write verify, page 0x%08x\n", page);
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write verify, page 0x%08x\n", page);
ret = -EIO;
goto out;
}
#endif
ret = 0;
-out:
+ out:
/* Deselect and wake up anyone waiting on the device */
nand_release_device(mtd);
return ret;
}
-
/**
* nand_writev - [MTD Interface] compabilty function for nand_writev_ecc
* @mtd: MTD device structure
*
* NAND write with kvec. This just calls the ecc function
*/
-static int nand_writev (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count,
- loff_t to, size_t * retlen)
+static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count,
+ loff_t to, size_t *retlen)
{
- return (nand_writev_ecc (mtd, vecs, count, to, retlen, NULL, NULL));
+ return (nand_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL));
}
/**
*
* NAND write with iovec with ecc
*/
-static int nand_writev_ecc (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count,
- loff_t to, size_t * retlen, u_char *eccbuf, struct nand_oobinfo *oobsel)
+static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count,
+ loff_t to, size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel)
{
int i, page, len, total_len, ret = -EIO, written = 0, chipnr;
int oob, numpages, autoplace = 0, startpage;
struct nand_chip *this = mtd->priv;
- int ppblock = (1 << (this->phys_erase_shift - this->page_shift));
+ int ppblock = (1 << (this->phys_erase_shift - this->page_shift));
u_char *oobbuf, *bufstart;
/* Preset written len for early exit */
/* Calculate total length of data */
total_len = 0;
for (i = 0; i < count; i++)
- total_len += (int) vecs[i].iov_len;
+ total_len += (int)vecs[i].iov_len;
- DEBUG (MTD_DEBUG_LEVEL3,
- "nand_writev: to = 0x%08x, len = %i, count = %ld\n", (unsigned int) to, (unsigned int) total_len, count);
+ DEBUG(MTD_DEBUG_LEVEL3, "nand_writev: to = 0x%08x, len = %i, count = %ld\n", (unsigned int)to, (unsigned int)total_len, count);
/* Do not allow write past end of page */
if ((to + total_len) > mtd->size) {
- DEBUG (MTD_DEBUG_LEVEL0, "nand_writev: Attempted write past end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_writev: Attempted write past end of device\n");
return -EINVAL;
}
- /* reject writes, which are not page aligned */
- if (NOTALIGNED (to) || NOTALIGNED(total_len)) {
- printk (KERN_NOTICE "nand_write_ecc: Attempt to write not page aligned data\n");
+ /* reject writes, which are not page aligned */
+ if (NOTALIGNED(to) || NOTALIGNED(total_len)) {
+ printk(KERN_NOTICE "nand_write_ecc: 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);
+ nand_get_device(this, mtd, FL_WRITING);
/* Get the current chip-nr */
- chipnr = (int) (to >> this->chip_shift);
+ chipnr = (int)(to >> this->chip_shift);
/* Select the NAND device */
this->select_chip(mtd, chipnr);
goto out;
/* if oobsel is NULL, use chip defaults */
- if (oobsel == NULL)
- oobsel = &mtd->oobinfo;
+ if (oobsel == NULL)
+ oobsel = &mtd->oobinfo;
/* 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;
/* Setup start page */
- page = (int) (to >> 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 < ((to + total_len) >> this->page_shift))
+ if (page <= this->pagebuf && this->pagebuf < ((to + total_len) >> this->page_shift))
this->pagebuf = -1;
startpage = page & this->pagemask;
/* If the given tuple is >= pagesize then
* write it out from the iov
*/
- if ((vecs->iov_len - len) >= mtd->oobblock) {
+ if ((vecs->iov_len - len) >= mtd->writesize) {
/* Calc number of pages we can write
* out of this iov in one go */
numpages = (vecs->iov_len - len) >> this->page_shift;
/* Do not cross block boundaries */
- numpages = min (ppblock - (startpage & (ppblock - 1)), numpages);
- oobbuf = nand_prepare_oobbuf (mtd, NULL, oobsel, autoplace, numpages);
- bufstart = (u_char *)vecs->iov_base;
+ numpages = min(ppblock - (startpage & (ppblock - 1)), numpages);
+ oobbuf = nand_prepare_oobbuf(mtd, NULL, oobsel, autoplace, numpages);
+ bufstart = (u_char *) vecs->iov_base;
bufstart += len;
this->data_poi = bufstart;
oob = 0;
for (i = 1; i <= numpages; i++) {
/* Write one page. If this is the last page to write
- * then use the real pageprogram command, else select
+ * then use the real pageprogram command, else select
* cached programming if supported by the chip.
*/
- ret = nand_write_page (mtd, this, page & this->pagemask,
- &oobbuf[oob], oobsel, i != numpages);
+ ret = nand_write_page(mtd, this, page & this->pagemask,
+ &oobbuf[oob], oobsel, i != numpages);
if (ret)
goto out;
- this->data_poi += mtd->oobblock;
- len += mtd->oobblock;
+ this->data_poi += mtd->writesize;
+ len += mtd->writesize;
oob += mtd->oobsize;
page++;
}
/* Check, if we have to switch to the next tuple */
- if (len >= (int) vecs->iov_len) {
+ if (len >= (int)vecs->iov_len) {
vecs++;
len = 0;
count--;
}
} else {
- /* We must use the internal buffer, read data out of each
+ /* We must use the internal buffer, read data out of each
* tuple until we have a full page to write
*/
int cnt = 0;
- while (cnt < mtd->oobblock) {
- if (vecs->iov_base != NULL && vecs->iov_len)
+ while (cnt < mtd->writesize) {
+ if (vecs->iov_base != NULL && vecs->iov_len)
this->data_buf[cnt++] = ((u_char *) vecs->iov_base)[len++];
/* Check, if we have to switch to the next tuple */
- if (len >= (int) vecs->iov_len) {
+ if (len >= (int)vecs->iov_len) {
vecs++;
len = 0;
count--;
}
}
- this->pagebuf = page;
- this->data_poi = this->data_buf;
+ this->pagebuf = page;
+ this->data_poi = this->data_buf;
bufstart = this->data_poi;
- numpages = 1;
- oobbuf = nand_prepare_oobbuf (mtd, NULL, oobsel, autoplace, numpages);
- ret = nand_write_page (mtd, this, page & this->pagemask,
- oobbuf, oobsel, 0);
+ numpages = 1;
+ oobbuf = nand_prepare_oobbuf(mtd, NULL, oobsel, autoplace, numpages);
+ ret = nand_write_page(mtd, this, page & this->pagemask, oobbuf, oobsel, 0);
if (ret)
goto out;
page++;
}
this->data_poi = bufstart;
- ret = nand_verify_pages (mtd, this, startpage, numpages, oobbuf, oobsel, chipnr, 0);
+ ret = nand_verify_pages(mtd, this, startpage, numpages, oobbuf, oobsel, chipnr, 0);
if (ret)
goto out;
-
- written += mtd->oobblock * numpages;
+
+ written += mtd->writesize * numpages;
/* All done ? */
if (!count)
break;
}
}
ret = 0;
-out:
+ out:
/* Deselect and wake up anyone waiting on the device */
nand_release_device(mtd);
*
* Standard erase command for NAND chips
*/
-static void single_erase_cmd (struct mtd_info *mtd, int page)
+static void single_erase_cmd(struct mtd_info *mtd, int page)
{
struct nand_chip *this = mtd->priv;
/* Send commands to erase a block */
- this->cmdfunc (mtd, NAND_CMD_ERASE1, -1, page);
- this->cmdfunc (mtd, NAND_CMD_ERASE2, -1, -1);
+ this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
+ this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
}
/**
* AND multi block erase command function
* Erase 4 consecutive blocks
*/
-static void multi_erase_cmd (struct mtd_info *mtd, int page)
+static void multi_erase_cmd(struct mtd_info *mtd, int page)
{
struct nand_chip *this = 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);
+ 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);
}
/**
*
* Erase one ore more blocks
*/
-static int nand_erase (struct mtd_info *mtd, struct erase_info *instr)
+static int nand_erase(struct mtd_info *mtd, struct erase_info *instr)
{
- return nand_erase_nand (mtd, instr, 0);
+ return nand_erase_nand(mtd, instr, 0);
}
-
+
#define BBT_PAGE_MASK 0xffffff3f
/**
* nand_erase_intern - [NAND Interface] erase block(s)
*
* 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;
/* It is used to see if the current page is in the same */
/* 256 block group and the same bank as the bbt. */
- 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)) {
- DEBUG (MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n");
+ 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");
+ 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(this, 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 >> this->page_shift);
+ chipnr = (int)(instr->addr >> this->chip_shift);
/* Calculate pages in each block */
pages_per_block = 1 << (this->phys_erase_shift - this->page_shift);
/* 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;
}
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);
+ 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
+
+ /* 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;
- this->erase_cmd (mtd, page & this->pagemask);
-
- status = this->waitfunc (mtd, this, FL_ERASING);
+ this->erase_cmd(mtd, page & this->pagemask);
+
+ status = this->waitfunc(mtd, this, FL_ERASING);
/* See if operation failed and additional status checks are available */
if ((status & NAND_STATUS_FAIL) && (this->errstat)) {
/* 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);
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) &&
+ if (((page & BBT_PAGE_MASK) == bbt_masked_page) &&
(page != this->bbt_td->pages[chipnr])) {
rewrite_bbt[chipnr] = (page << this->page_shift);
}
}
-
+
/* Increment page address and decrement length */
len -= (1 << this->phys_erase_shift);
page += pages_per_block;
this->select_chip(mtd, -1);
this->select_chip(mtd, chipnr);
- /* if BBT requires refresh and BBT-PERCHIP,
+ /* 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;
}
instr->state = MTD_ERASE_DONE;
-erase_exit:
+ erase_exit:
ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
/* Do call back function */
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]);
+ 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]);
}
}
}
*
* Sync is actually a wait for chip ready function
*/
-static void nand_sync (struct mtd_info *mtd)
+static void nand_sync(struct mtd_info *mtd)
{
struct nand_chip *this = mtd->priv;
- DEBUG (MTD_DEBUG_LEVEL3, "nand_sync: called\n");
+ 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(this, mtd, FL_SYNCING);
/* Release it and go back */
- nand_release_device (mtd);
+ nand_release_device(mtd);
}
-
/**
* nand_block_isbad - [MTD Interface] Check whether the block at the given 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 ofs)
{
/* Check for invalid offset */
- if (ofs > mtd->size)
+ if (ofs > mtd->size)
return -EINVAL;
-
- return nand_block_checkbad (mtd, ofs, 1, 0);
+
+ return nand_block_checkbad(mtd, ofs, 1, 0);
}
/**
* @mtd: MTD device structure
* @ofs: offset relative to mtd start
*/
-static int nand_block_markbad (struct mtd_info *mtd, loff_t ofs)
+static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
struct nand_chip *this = mtd->priv;
int ret;
- if ((ret = nand_block_isbad(mtd, ofs))) {
- /* If it was bad already, return success and do nothing. */
+ if ((ret = nand_block_isbad(mtd, ofs))) {
+ /* If it was bad already, return success and do nothing. */
if (ret > 0)
return 0;
- return ret;
- }
+ return ret;
+ }
return this->block_markbad(mtd, ofs);
}
/**
+ * nand_suspend - [MTD Interface] Suspend the NAND flash
+ * @mtd: MTD device structure
+ */
+static int nand_suspend(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+
+ return nand_get_device(this, mtd, FL_PM_SUSPENDED);
+}
+
+/**
+ * nand_resume - [MTD Interface] Resume the NAND flash
+ * @mtd: MTD device structure
+ */
+static void nand_resume(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+
+ if (this->state == FL_PM_SUSPENDED)
+ nand_release_device(mtd);
+ else
+ printk(KERN_ERR "resume() called for the chip which is not in suspended state\n");
+
+}
+
+/* module_text_address() isn't exported, and it's mostly a pointless
+ test if this is a module _anyway_ -- they'd have to try _really_ hard
+ to call us from in-kernel code if the core NAND support is modular. */
+#ifdef MODULE
+#define caller_is_module() (1)
+#else
+#define caller_is_module() module_text_address((unsigned long)__builtin_return_address(0))
+#endif
+
+/**
* nand_scan - [NAND Interface] Scan for the NAND device
* @mtd: MTD device structure
* @maxchips: Number of chips to scan for
*
- * This fills out all the not initialized function pointers
+ * 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
+ * The mtd->owner field must be set to the module of the caller
*
*/
-int nand_scan (struct mtd_info *mtd, int maxchips)
+int nand_scan(struct mtd_info *mtd, int maxchips)
{
int i, nand_maf_id, nand_dev_id, busw, maf_id;
struct nand_chip *this = mtd->priv;
- /* Get buswidth to select the correct functions*/
+ /* Many callers got this wrong, so check for it for a while... */
+ if (!mtd->owner && caller_is_module()) {
+ printk(KERN_CRIT "nand_scan() called with NULL mtd->owner!\n");
+ BUG();
+ }
+
+ /* Get buswidth to select the correct functions */
busw = this->options & NAND_BUSWIDTH_16;
/* check for proper chip_delay setup, set 20us if not */
this->select_chip(mtd, 0);
/* Send the command for reading device ID */
- this->cmdfunc (mtd, NAND_CMD_READID, 0x00, -1);
+ this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
/* Read manufacturer and device IDs */
nand_maf_id = this->read_byte(mtd);
/* Print and store flash device information */
for (i = 0; nand_flash_ids[i].name != NULL; i++) {
-
- if (nand_dev_id != nand_flash_ids[i].id)
+
+ if (nand_dev_id != nand_flash_ids[i].id)
continue;
- if (!mtd->name) mtd->name = nand_flash_ids[i].name;
+ if (!mtd->name)
+ mtd->name = nand_flash_ids[i].name;
this->chipsize = nand_flash_ids[i].chipsize << 20;
-
+
/* New devices have all the information in additional id bytes */
if (!nand_flash_ids[i].pagesize) {
int extid;
/* The 4th id byte is the important one */
extid = this->read_byte(mtd);
/* Calc pagesize */
- mtd->oobblock = 1024 << (extid & 0x3);
+ mtd->writesize = 1024 << (extid & 0x3);
extid >>= 2;
/* Calc oobsize */
- mtd->oobsize = (8 << (extid & 0x03)) * (mtd->oobblock / 512);
+ mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9);
extid >>= 2;
/* Calc blocksize. Blocksize is multiples of 64KiB */
- mtd->erasesize = (64 * 1024) << (extid & 0x03);
+ mtd->erasesize = (64 * 1024) << (extid & 0x03);
extid >>= 2;
/* Get buswidth information */
busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0;
-
+
} else {
/* Old devices have this data hardcoded in the
* device id table */
mtd->erasesize = nand_flash_ids[i].erasesize;
- mtd->oobblock = nand_flash_ids[i].pagesize;
- mtd->oobsize = mtd->oobblock / 32;
+ mtd->writesize = nand_flash_ids[i].pagesize;
+ mtd->oobsize = mtd->writesize / 32;
busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16;
}
/* Check, if buswidth is correct. Hardware drivers should set
* this correct ! */
if (busw != (this->options & NAND_BUSWIDTH_16)) {
- printk (KERN_INFO "NAND device: Manufacturer ID:"
- " 0x%02x, Chip ID: 0x%02x (%s %s)\n", nand_maf_id, nand_dev_id,
- nand_manuf_ids[maf_id].name , mtd->name);
- printk (KERN_WARNING
- "NAND bus width %d instead %d bit\n",
- (this->options & NAND_BUSWIDTH_16) ? 16 : 8,
- busw ? 16 : 8);
+ printk(KERN_INFO "NAND device: Manufacturer ID:"
+ " 0x%02x, Chip ID: 0x%02x (%s %s)\n", nand_maf_id, nand_dev_id,
+ nand_manuf_ids[maf_id].name, mtd->name);
+ printk(KERN_WARNING
+ "NAND bus width %d instead %d bit\n",
+ (this->options & NAND_BUSWIDTH_16) ? 16 : 8, busw ? 16 : 8);
this->select_chip(mtd, -1);
- return 1;
+ return 1;
}
-
- /* Calculate the address shift from the page size */
- this->page_shift = ffs(mtd->oobblock) - 1;
+
+ /* Calculate the address shift from the page size */
+ this->page_shift = ffs(mtd->writesize) - 1;
this->bbt_erase_shift = this->phys_erase_shift = ffs(mtd->erasesize) - 1;
this->chip_shift = ffs(this->chipsize) - 1;
/* Set the bad block position */
- this->badblockpos = mtd->oobblock > 512 ?
- NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS;
+ this->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;
- /* Set this as a default. Board drivers can override it, if neccecary */
+ /* Set this as a default. Board drivers can override it, if necessary */
this->options |= NAND_NO_AUTOINCR;
/* Check if this is a not a samsung device. Do not clear the options
* for chips which are not having an extended id.
- */
+ */
if (nand_maf_id != NAND_MFR_SAMSUNG && !nand_flash_ids[i].pagesize)
this->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;
this->erase_cmd = single_erase_cmd;
/* Do not replace user supplied command function ! */
- if (mtd->oobblock > 512 && this->cmdfunc == nand_command)
+ if (mtd->writesize > 512 && this->cmdfunc == nand_command)
this->cmdfunc = nand_command_lp;
-
- printk (KERN_INFO "NAND device: Manufacturer ID:"
- " 0x%02x, Chip ID: 0x%02x (%s %s)\n", nand_maf_id, nand_dev_id,
- nand_manuf_ids[maf_id].name , nand_flash_ids[i].name);
+
+ printk(KERN_INFO "NAND device: Manufacturer ID:"
+ " 0x%02x, Chip ID: 0x%02x (%s %s)\n", nand_maf_id, nand_dev_id,
+ nand_manuf_ids[maf_id].name, nand_flash_ids[i].name);
break;
}
if (!nand_flash_ids[i].name) {
- printk (KERN_WARNING "No NAND device found!!!\n");
+ printk(KERN_WARNING "No NAND device found!!!\n");
this->select_chip(mtd, -1);
return 1;
}
- for (i=1; i < maxchips; i++) {
+ for (i = 1; i < maxchips; i++) {
this->select_chip(mtd, i);
/* Send the command for reading device ID */
- this->cmdfunc (mtd, NAND_CMD_READID, 0x00, -1);
+ this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
/* Read manufacturer and device IDs */
if (nand_maf_id != this->read_byte(mtd) ||
}
if (i > 1)
printk(KERN_INFO "%d NAND chips detected\n", i);
-
- /* Allocate buffers, if neccecary */
+
+ /* Allocate buffers, if necessary */
if (!this->oob_buf) {
size_t len;
len = mtd->oobsize << (this->phys_erase_shift - this->page_shift);
- this->oob_buf = kmalloc (len, GFP_KERNEL);
+ this->oob_buf = kmalloc(len, GFP_KERNEL);
if (!this->oob_buf) {
- printk (KERN_ERR "nand_scan(): Cannot allocate oob_buf\n");
+ printk(KERN_ERR "nand_scan(): Cannot allocate oob_buf\n");
return -ENOMEM;
}
this->options |= NAND_OOBBUF_ALLOC;
}
-
+
if (!this->data_buf) {
size_t len;
- len = mtd->oobblock + mtd->oobsize;
- this->data_buf = kmalloc (len, GFP_KERNEL);
+ len = mtd->writesize + mtd->oobsize;
+ this->data_buf = kmalloc(len, GFP_KERNEL);
if (!this->data_buf) {
if (this->options & NAND_OOBBUF_ALLOC)
- kfree (this->oob_buf);
- printk (KERN_ERR "nand_scan(): Cannot allocate data_buf\n");
+ kfree(this->oob_buf);
+ printk(KERN_ERR "nand_scan(): Cannot allocate data_buf\n");
return -ENOMEM;
}
this->options |= NAND_DATABUF_ALLOC;
if (!this->autooob) {
/* Select the appropriate default oob placement scheme for
* placement agnostic filesystems */
- switch (mtd->oobsize) {
+ switch (mtd->oobsize) {
case 8:
this->autooob = &nand_oob_8;
break;
this->autooob = &nand_oob_64;
break;
default:
- printk (KERN_WARNING "No oob scheme defined for oobsize %d\n",
- mtd->oobsize);
+ printk(KERN_WARNING "No oob scheme defined for oobsize %d\n", mtd->oobsize);
BUG();
}
}
-
+
/* The number of bytes available for the filesystem to place fs dependend
* oob data */
- if (this->options & NAND_BUSWIDTH_16) {
- mtd->oobavail = mtd->oobsize - (this->autooob->eccbytes + 2);
- if (this->autooob->eccbytes & 0x01)
- mtd->oobavail--;
- } else
- mtd->oobavail = mtd->oobsize - (this->autooob->eccbytes + 1);
+ 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
- */
- this->eccsize = 256; /* set default eccsize */
+ * fallback to software ECC
+ */
+ this->eccsize = 256; /* set default eccsize */
this->eccbytes = 3;
switch (this->eccmode) {
case NAND_ECC_HW12_2048:
- if (mtd->oobblock < 2048) {
+ if (mtd->writesize < 2048) {
printk(KERN_WARNING "2048 byte HW ECC not possible on %d byte page size, fallback to SW ECC\n",
- mtd->oobblock);
+ mtd->writesize);
this->eccmode = NAND_ECC_SOFT;
this->calculate_ecc = nand_calculate_ecc;
this->correct_data = nand_correct_data;
this->eccsize = 2048;
break;
- case NAND_ECC_HW3_512:
- case NAND_ECC_HW6_512:
- case NAND_ECC_HW8_512:
- if (mtd->oobblock == 256) {
- printk (KERN_WARNING "512 byte HW ECC not possible on 256 Byte pagesize, fallback to SW ECC \n");
+ case NAND_ECC_HW3_512:
+ case NAND_ECC_HW6_512:
+ case NAND_ECC_HW8_512:
+ if (mtd->writesize == 256) {
+ printk(KERN_WARNING "512 byte HW ECC not possible on 256 Byte pagesize, fallback to SW ECC \n");
this->eccmode = NAND_ECC_SOFT;
this->calculate_ecc = nand_calculate_ecc;
this->correct_data = nand_correct_data;
- } else
- this->eccsize = 512; /* set eccsize to 512 */
+ } else
+ this->eccsize = 512; /* set eccsize to 512 */
break;
-
+
case NAND_ECC_HW3_256:
break;
-
- case NAND_ECC_NONE:
- printk (KERN_WARNING "NAND_ECC_NONE selected by board driver. This is not recommended !!\n");
+
+ case NAND_ECC_NONE:
+ printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. This is not recommended !!\n");
this->eccmode = NAND_ECC_NONE;
break;
- case NAND_ECC_SOFT:
+ case NAND_ECC_SOFT:
this->calculate_ecc = nand_calculate_ecc;
this->correct_data = nand_correct_data;
break;
default:
- printk (KERN_WARNING "Invalid NAND_ECC_MODE %d\n", this->eccmode);
- BUG();
- }
+ printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", this->eccmode);
+ BUG();
+ }
- /* Check hardware ecc function availability and adjust number of ecc bytes per
+ /* Check hardware ecc function availability and adjust number of ecc bytes per
* calculation step
- */
+ */
switch (this->eccmode) {
case NAND_ECC_HW12_2048:
this->eccbytes += 4;
- case NAND_ECC_HW8_512:
+ case NAND_ECC_HW8_512:
this->eccbytes += 2;
- case NAND_ECC_HW6_512:
+ case NAND_ECC_HW6_512:
this->eccbytes += 3;
- case NAND_ECC_HW3_512:
+ case NAND_ECC_HW3_512:
case NAND_ECC_HW3_256:
if (this->calculate_ecc && this->correct_data && this->enable_hwecc)
break;
- printk (KERN_WARNING "No ECC functions supplied, Hardware ECC not possible\n");
- BUG();
+ printk(KERN_WARNING "No ECC functions supplied, Hardware ECC not possible\n");
+ BUG();
}
-
+
mtd->eccsize = this->eccsize;
-
+
/* Set the number of read / write steps for one page to ensure ECC generation */
switch (this->eccmode) {
case NAND_ECC_HW12_2048:
- this->eccsteps = mtd->oobblock / 2048;
+ this->eccsteps = mtd->writesize / 2048;
break;
case NAND_ECC_HW3_512:
case NAND_ECC_HW6_512:
case NAND_ECC_HW8_512:
- this->eccsteps = mtd->oobblock / 512;
+ this->eccsteps = mtd->writesize / 512;
break;
case NAND_ECC_HW3_256:
- case NAND_ECC_SOFT:
- this->eccsteps = mtd->oobblock / 256;
+ case NAND_ECC_SOFT:
+ this->eccsteps = mtd->writesize / 256;
break;
-
- case NAND_ECC_NONE:
+
+ case NAND_ECC_NONE:
this->eccsteps = 1;
break;
}
-
+
/* Initialize state, waitqueue and spinlock */
this->state = FL_READY;
- init_waitqueue_head (&this->wq);
- spin_lock_init (&this->chip_lock);
+ init_waitqueue_head(&this->wq);
+ spin_lock_init(&this->chip_lock);
/* De-select the device */
this->select_chip(mtd, -1);
/* Fill in remaining MTD driver data */
mtd->type = MTD_NANDFLASH;
- mtd->flags = MTD_CAP_NANDFLASH | MTD_ECC;
+ mtd->flags = MTD_CAP_NANDFLASH;
mtd->ecctype = MTD_ECC_SW;
mtd->erase = nand_erase;
mtd->point = NULL;
mtd->sync = nand_sync;
mtd->lock = NULL;
mtd->unlock = NULL;
- mtd->suspend = NULL;
- mtd->resume = NULL;
+ mtd->suspend = nand_suspend;
+ mtd->resume = nand_resume;
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));
- mtd->owner = THIS_MODULE;
-
/* Check, if we should skip the bad block table scan */
if (this->options & NAND_SKIP_BBTSCAN)
return 0;
/* Build bad block table */
- return this->scan_bbt (mtd);
+ return this->scan_bbt(mtd);
}
/**
- * nand_release - [NAND Interface] Free resources held by the NAND device
+ * nand_release - [NAND Interface] Free resources held by the NAND device
* @mtd: MTD device structure
*/
-void nand_release (struct mtd_info *mtd)
+void nand_release(struct mtd_info *mtd)
{
struct nand_chip *this = mtd->priv;
#ifdef CONFIG_MTD_PARTITIONS
/* Deregister partitions */
- del_mtd_partitions (mtd);
+ del_mtd_partitions(mtd);
#endif
/* Deregister the device */
- del_mtd_device (mtd);
+ del_mtd_device(mtd);
- /* Free bad block table memory, if allocated */
- if (this->bbt)
- kfree (this->bbt);
+ /* Free bad block table memory */
+ kfree(this->bbt);
/* Buffer allocated by nand_scan ? */
if (this->options & NAND_OOBBUF_ALLOC)
- kfree (this->oob_buf);
+ kfree(this->oob_buf);
/* Buffer allocated by nand_scan ? */
if (this->options & NAND_DATABUF_ALLOC)
- kfree (this->data_buf);
+ kfree(this->data_buf);
+}
+
+EXPORT_SYMBOL_GPL(nand_scan);
+EXPORT_SYMBOL_GPL(nand_release);
+
+static int __init nand_base_init(void)
+{
+ led_trigger_register_simple("nand-disk", &nand_led_trigger);
+ return 0;
+}
+
+static void __exit nand_base_exit(void)
+{
+ led_trigger_unregister_simple(nand_led_trigger);
}
-EXPORT_SYMBOL (nand_scan);
-EXPORT_SYMBOL (nand_release);
+module_init(nand_base_init);
+module_exit(nand_base_exit);
-MODULE_LICENSE ("GPL");
-MODULE_AUTHOR ("Steven J. Hill <sjhill@realitydiluted.com>, Thomas Gleixner <tglx@linutronix.de>");
-MODULE_DESCRIPTION ("Generic NAND flash driver code");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>, Thomas Gleixner <tglx@linutronix.de>");
+MODULE_DESCRIPTION("Generic NAND flash driver code");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff