/*
* linux/drivers/mtd/onenand/onenand_base.c
*
- * Copyright (C) 2005 Samsung Electronics
+ * Copyright (C) 2005-2007 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
+#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/onenand.h>
/**
* onenand_oob_64 - oob info for large (2KB) page
*/
-static struct nand_oobinfo onenand_oob_64 = {
- .useecc = MTD_NANDECC_AUTOPLACE,
+static struct nand_ecclayout onenand_oob_64 = {
.eccbytes = 20,
.eccpos = {
8, 9, 10, 11, 12,
/**
* onenand_oob_32 - oob info for middle (1KB) page
*/
-static struct nand_oobinfo onenand_oob_32 = {
- .useecc = MTD_NANDECC_AUTOPLACE,
+static struct nand_ecclayout onenand_oob_32 = {
.eccbytes = 10,
.eccpos = {
8, 9, 10, 11, 12,
*/
static int onenand_block_address(struct onenand_chip *this, int block)
{
- if (this->device_id & ONENAND_DEVICE_IS_DDP) {
- /* Device Flash Core select, NAND Flash Block Address */
- int dfs = 0;
-
- if (block & this->density_mask)
- dfs = 1;
-
- return (dfs << ONENAND_DDP_SHIFT) |
- (block & (this->density_mask - 1));
- }
+ /* Device Flash Core select, NAND Flash Block Address */
+ if (block & this->density_mask)
+ return ONENAND_DDP_CHIP1 | (block ^ this->density_mask);
return block;
}
*/
static int onenand_bufferram_address(struct onenand_chip *this, int block)
{
- if (this->device_id & ONENAND_DEVICE_IS_DDP) {
- /* Device BufferRAM Select */
- int dbs = 0;
-
- if (block & this->density_mask)
- dbs = 1;
+ /* Device BufferRAM Select */
+ if (block & this->density_mask)
+ return ONENAND_DDP_CHIP1;
- return (dbs << ONENAND_DDP_SHIFT);
- }
-
- return 0;
+ return ONENAND_DDP_CHIP0;
}
/**
static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len)
{
struct onenand_chip *this = mtd->priv;
- int value, readcmd = 0;
+ int value, readcmd = 0, block_cmd = 0;
int block, page;
- /* Now we use page size operation */
- int sectors = 4, count = 4;
/* Address translation */
switch (cmd) {
case ONENAND_CMD_UNLOCK:
case ONENAND_CMD_LOCK:
case ONENAND_CMD_LOCK_TIGHT:
+ case ONENAND_CMD_UNLOCK_ALL:
block = -1;
page = -1;
break;
case ONENAND_CMD_ERASE:
case ONENAND_CMD_BUFFERRAM:
+ case ONENAND_CMD_OTP_ACCESS:
+ block_cmd = 1;
block = (int) (addr >> this->erase_shift);
page = -1;
break;
/* Write 'DFS, FBA' of Flash */
value = onenand_block_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
+
+ if (block_cmd) {
+ /* Select DataRAM for DDP */
+ value = onenand_bufferram_address(this, block);
+ this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
+ }
}
if (page != -1) {
+ /* Now we use page size operation */
+ int sectors = 4, count = 4;
int dataram;
switch (cmd) {
unsigned long timeout;
unsigned int flags = ONENAND_INT_MASTER;
unsigned int interrupt = 0;
- unsigned int ctrl, ecc;
+ unsigned int ctrl;
/* The 20 msec is enough */
timeout = jiffies + msecs_to_jiffies(20);
if (state != FL_READING)
cond_resched();
- touch_softlockup_watchdog();
}
/* To get correct interrupt status in timeout case */
interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
if (ctrl & ONENAND_CTRL_ERROR) {
- /* It maybe occur at initial bad block */
DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: controller error = 0x%04x\n", ctrl);
- /* Clear other interrupt bits for preventing ECC error */
- interrupt &= ONENAND_INT_MASTER;
- }
-
- if (ctrl & ONENAND_CTRL_LOCK) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error = 0x%04x\n", ctrl);
- return -EACCES;
+ if (ctrl & ONENAND_CTRL_LOCK)
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error.\n");
+ return ctrl;
}
if (interrupt & ONENAND_INT_READ) {
- ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
- if (ecc & ONENAND_ECC_2BIT_ALL) {
+ int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
+ if (ecc) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc);
- return -EBADMSG;
+ if (ecc & ONENAND_ECC_2BIT_ALL) {
+ mtd->ecc_stats.failed++;
+ return ecc;
+ } else if (ecc & ONENAND_ECC_1BIT_ALL)
+ mtd->ecc_stats.corrected++;
}
+ } else if (state == FL_READING) {
+ printk(KERN_ERR "onenand_wait: read timeout! ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
+ return -EIO;
}
return 0;
}
+/*
+ * onenand_interrupt - [DEFAULT] onenand interrupt handler
+ * @param irq onenand interrupt number
+ * @param dev_id interrupt data
+ *
+ * complete the work
+ */
+static irqreturn_t onenand_interrupt(int irq, void *data)
+{
+ struct onenand_chip *this = (struct onenand_chip *) data;
+
+ /* To handle shared interrupt */
+ if (!this->complete.done)
+ complete(&this->complete);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * onenand_interrupt_wait - [DEFAULT] wait until the command is done
+ * @param mtd MTD device structure
+ * @param state state to select the max. timeout value
+ *
+ * Wait for command done.
+ */
+static int onenand_interrupt_wait(struct mtd_info *mtd, int state)
+{
+ struct onenand_chip *this = mtd->priv;
+
+ wait_for_completion(&this->complete);
+
+ return onenand_wait(mtd, state);
+}
+
+/*
+ * onenand_try_interrupt_wait - [DEFAULT] try interrupt wait
+ * @param mtd MTD device structure
+ * @param state state to select the max. timeout value
+ *
+ * Try interrupt based wait (It is used one-time)
+ */
+static int onenand_try_interrupt_wait(struct mtd_info *mtd, int state)
+{
+ struct onenand_chip *this = mtd->priv;
+ unsigned long remain, timeout;
+
+ /* We use interrupt wait first */
+ this->wait = onenand_interrupt_wait;
+
+ timeout = msecs_to_jiffies(100);
+ remain = wait_for_completion_timeout(&this->complete, timeout);
+ if (!remain) {
+ printk(KERN_INFO "OneNAND: There's no interrupt. "
+ "We use the normal wait\n");
+
+ /* Release the irq */
+ free_irq(this->irq, this);
+
+ this->wait = onenand_wait;
+ }
+
+ return onenand_wait(mtd, state);
+}
+
+/*
+ * onenand_setup_wait - [OneNAND Interface] setup onenand wait method
+ * @param mtd MTD device structure
+ *
+ * There's two method to wait onenand work
+ * 1. polling - read interrupt status register
+ * 2. interrupt - use the kernel interrupt method
+ */
+static void onenand_setup_wait(struct mtd_info *mtd)
+{
+ struct onenand_chip *this = mtd->priv;
+ int syscfg;
+
+ init_completion(&this->complete);
+
+ if (this->irq <= 0) {
+ this->wait = onenand_wait;
+ return;
+ }
+
+ if (request_irq(this->irq, &onenand_interrupt,
+ IRQF_SHARED, "onenand", this)) {
+ /* If we can't get irq, use the normal wait */
+ this->wait = onenand_wait;
+ return;
+ }
+
+ /* Enable interrupt */
+ syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
+ syscfg |= ONENAND_SYS_CFG1_IOBE;
+ this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
+
+ this->wait = onenand_try_interrupt_wait;
+}
+
/**
* onenand_bufferram_offset - [DEFAULT] BufferRAM offset
* @param mtd MTD data structure
if (ONENAND_CURRENT_BUFFERRAM(this)) {
if (area == ONENAND_DATARAM)
- return mtd->oobblock;
+ return mtd->writesize;
if (area == ONENAND_SPARERAM)
return mtd->oobsize;
}
static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
{
struct onenand_chip *this = mtd->priv;
- int block, page;
- int i;
+ int blockpage;
+ unsigned int i;
- block = (int) (addr >> this->erase_shift);
- page = (int) (addr >> this->page_shift);
- page &= this->page_mask;
+ blockpage = (int) (addr >> this->page_shift);
+ /* Is there valid data? */
i = ONENAND_CURRENT_BUFFERRAM(this);
+ if (this->bufferram[i].blockpage == blockpage)
+ return 1;
- /* Is there valid data? */
- if (this->bufferram[i].block == block &&
- this->bufferram[i].page == page &&
- this->bufferram[i].valid)
+ /* Check another BufferRAM */
+ i = ONENAND_NEXT_BUFFERRAM(this);
+ if (this->bufferram[i].blockpage == blockpage) {
+ ONENAND_SET_NEXT_BUFFERRAM(this);
return 1;
+ }
return 0;
}
*
* Update BufferRAM information
*/
-static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
+static void onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
int valid)
{
struct onenand_chip *this = mtd->priv;
- int block, page;
- int i;
+ int blockpage;
+ unsigned int i;
- block = (int) (addr >> this->erase_shift);
- page = (int) (addr >> this->page_shift);
- page &= this->page_mask;
+ blockpage = (int) (addr >> this->page_shift);
- /* Invalidate BufferRAM */
- for (i = 0; i < MAX_BUFFERRAM; i++) {
- if (this->bufferram[i].block == block &&
- this->bufferram[i].page == page)
- this->bufferram[i].valid = 0;
- }
+ /* Invalidate another BufferRAM */
+ i = ONENAND_NEXT_BUFFERRAM(this);
+ if (this->bufferram[i].blockpage == blockpage)
+ this->bufferram[i].blockpage = -1;
/* Update BufferRAM */
i = ONENAND_CURRENT_BUFFERRAM(this);
- this->bufferram[i].block = block;
- this->bufferram[i].page = page;
- this->bufferram[i].valid = valid;
-
- return 0;
+ if (valid)
+ this->bufferram[i].blockpage = blockpage;
+ else
+ this->bufferram[i].blockpage = -1;
}
/**
}
/**
- * onenand_read_ecc - [MTD Interface] Read data with ECC
+ * onenand_read - [MTD Interface] Read data from flash
* @param mtd MTD device structure
* @param from offset to read from
* @param len number of bytes to read
* @param retlen pointer to variable to store the number of read bytes
* @param buf the databuffer to put data
- * @param oob_buf filesystem supplied oob data buffer
- * @param oobsel oob selection structure
*
- * OneNAND read with ECC
- */
-static int onenand_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)
+ * Read with ecc
+*/
+static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
{
struct onenand_chip *this = mtd->priv;
+ struct mtd_ecc_stats stats;
int read = 0, column;
int thislen;
- int ret = 0;
+ int ret = 0, boundary = 0;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ecc: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "onenand_read: 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, "onenand_read_ecc: Attempt read beyond end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_read: Attempt read beyond end of device\n");
*retlen = 0;
return -EINVAL;
}
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_READING);
- /* TODO handling oob */
-
- while (read < len) {
- thislen = min_t(int, mtd->oobblock, len - read);
-
- column = from & (mtd->oobblock - 1);
- if (column + thislen > mtd->oobblock)
- thislen = mtd->oobblock - column;
-
- if (!onenand_check_bufferram(mtd, from)) {
- this->command(mtd, ONENAND_CMD_READ, from, mtd->oobblock);
-
- ret = this->wait(mtd, FL_READING);
- /* First copy data and check return value for ECC handling */
- onenand_update_bufferram(mtd, from, 1);
- }
-
- this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen);
-
- read += thislen;
-
- if (read == len)
- break;
-
- if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_ecc: read failed = %d\n", ret);
- goto out;
- }
-
- from += thislen;
- buf += thislen;
- }
+ stats = mtd->ecc_stats;
+
+ /* Read-while-load method */
+
+ /* Do first load to bufferRAM */
+ if (read < len) {
+ if (!onenand_check_bufferram(mtd, from)) {
+ this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize);
+ ret = this->wait(mtd, FL_READING);
+ onenand_update_bufferram(mtd, from, !ret);
+ }
+ }
+
+ thislen = min_t(int, mtd->writesize, len - read);
+ column = from & (mtd->writesize - 1);
+ if (column + thislen > mtd->writesize)
+ thislen = mtd->writesize - column;
+
+ while (!ret) {
+ /* If there is more to load then start next load */
+ from += thislen;
+ if (read + thislen < len) {
+ this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize);
+ /*
+ * Chip boundary handling in DDP
+ * Now we issued chip 1 read and pointed chip 1
+ * bufferam so we have to point chip 0 bufferam.
+ */
+ if (ONENAND_IS_DDP(this) &&
+ unlikely(from == (this->chipsize >> 1))) {
+ this->write_word(ONENAND_DDP_CHIP0, this->base + ONENAND_REG_START_ADDRESS2);
+ boundary = 1;
+ } else
+ boundary = 0;
+ ONENAND_SET_PREV_BUFFERRAM(this);
+ }
+ /* While load is going, read from last bufferRAM */
+ this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen);
+ /* See if we are done */
+ read += thislen;
+ if (read == len)
+ break;
+ /* Set up for next read from bufferRAM */
+ if (unlikely(boundary))
+ this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2);
+ ONENAND_SET_NEXT_BUFFERRAM(this);
+ buf += thislen;
+ thislen = min_t(int, mtd->writesize, len - read);
+ column = 0;
+ cond_resched();
+ /* Now wait for load */
+ ret = this->wait(mtd, FL_READING);
+ onenand_update_bufferram(mtd, from, !ret);
+ }
-out:
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
* retlen == desired len and result == -EBADMSG
*/
*retlen = read;
- return ret;
+
+ if (mtd->ecc_stats.failed - stats.failed)
+ return -EBADMSG;
+
+ if (ret)
+ return ret;
+
+ return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
}
/**
- * onenand_read - [MTD Interface] MTD compability function for onenand_read_ecc
+ * onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
* @param mtd MTD device structure
- * @param from offset to read from
- * @param len number of bytes to read
- * @param retlen pointer to variable to store the number of read bytes
- * @param buf the databuffer to put data
- *
- * This function simply calls onenand_read_ecc with oob buffer and oobsel = NULL
-*/
-static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+ * @param buf destination address
+ * @param column oob offset to read from
+ * @param thislen oob length to read
+ */
+static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf, int column,
+ int thislen)
{
- return onenand_read_ecc(mtd, from, len, retlen, buf, NULL, NULL);
+ struct onenand_chip *this = mtd->priv;
+ struct nand_oobfree *free;
+ int readcol = column;
+ int readend = column + thislen;
+ int lastgap = 0;
+ uint8_t *oob_buf = this->page_buf + mtd->writesize;
+
+ for (free = this->ecclayout->oobfree; free->length; ++free) {
+ if (readcol >= lastgap)
+ readcol += free->offset - lastgap;
+ if (readend >= lastgap)
+ readend += free->offset - lastgap;
+ lastgap = free->offset + free->length;
+ }
+ this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
+ for (free = this->ecclayout->oobfree; free->length; ++free) {
+ int free_end = free->offset + free->length;
+ if (free->offset < readend && free_end > readcol) {
+ int st = max_t(int,free->offset,readcol);
+ int ed = min_t(int,free_end,readend);
+ int n = ed - st;
+ memcpy(buf, oob_buf + st, n);
+ buf += n;
+ }
+ }
+ return 0;
}
/**
- * onenand_read_oob - [MTD Interface] OneNAND read out-of-band
+ * onenand_do_read_oob - [MTD Interface] OneNAND read out-of-band
* @param mtd MTD device structure
* @param from offset to read from
* @param len number of bytes to read
* @param retlen pointer to variable to store the number of read bytes
* @param buf the databuffer to put data
+ * @param mode operation mode
*
* OneNAND read out-of-band data from the spare area
*/
-static int onenand_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf, mtd_oob_mode_t mode)
{
struct onenand_chip *this = mtd->priv;
- int read = 0, thislen, column;
+ int read = 0, thislen, column, oobsize;
int ret = 0;
DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
/* Initialize return length value */
*retlen = 0;
+ if (mode == MTD_OOB_AUTO)
+ oobsize = this->ecclayout->oobavail;
+ else
+ oobsize = mtd->oobsize;
+
+ column = from & (mtd->oobsize - 1);
+
+ if (unlikely(column >= oobsize)) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: Attempted to start read outside oob\n");
+ return -EINVAL;
+ }
+
/* Do not allow reads past end of device */
- if (unlikely((from + len) > mtd->size)) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: Attempt read beyond end of device\n");
+ if (unlikely(from >= mtd->size ||
+ column + len > ((mtd->size >> this->page_shift) -
+ (from >> this->page_shift)) * oobsize)) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: Attempted to read beyond end of device\n");
return -EINVAL;
}
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_READING);
- column = from & (mtd->oobsize - 1);
-
while (read < len) {
- thislen = mtd->oobsize - column;
+ cond_resched();
+
+ thislen = oobsize - column;
thislen = min_t(int, thislen, len);
this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
ret = this->wait(mtd, FL_READING);
/* First copy data and check return value for ECC handling */
- this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
+ if (mode == MTD_OOB_AUTO)
+ onenand_transfer_auto_oob(mtd, buf, column, thislen);
+ else
+ this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
+
+ if (ret) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: read failed = 0x%x\n", ret);
+ break;
+ }
read += thislen;
if (read == len)
break;
- if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: read failed = %d\n", ret);
- goto out;
- }
-
buf += thislen;
/* Read more? */
if (read < len) {
/* Page size */
- from += mtd->oobblock;
+ from += mtd->writesize;
column = 0;
}
}
-out:
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
return ret;
}
+/**
+ * onenand_read_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 onenand_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
+{
+ switch (ops->mode) {
+ case MTD_OOB_PLACE:
+ case MTD_OOB_AUTO:
+ break;
+ case MTD_OOB_RAW:
+ /* Not implemented yet */
+ default:
+ return -EINVAL;
+ }
+ return onenand_do_read_oob(mtd, from + ops->ooboffs, ops->ooblen,
+ &ops->oobretlen, ops->oobbuf, ops->mode);
+}
+
#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
/**
- * onenand_verify_page - [GENERIC] verify the chip contents after a write
+ * onenand_verify_oob - [GENERIC] verify the oob contents after a write
* @param mtd MTD device structure
* @param buf the databuffer to verify
+ * @param to offset to read from
+ *
+ */
+static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
+{
+ struct onenand_chip *this = mtd->priv;
+ char *readp = this->page_buf + mtd->writesize;
+ int status, i;
+
+ this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize);
+ onenand_update_bufferram(mtd, to, 0);
+ status = this->wait(mtd, FL_READING);
+ if (status)
+ return status;
+
+ this->read_bufferram(mtd, ONENAND_SPARERAM, readp, 0, mtd->oobsize);
+ for(i = 0; i < mtd->oobsize; i++)
+ if (buf[i] != 0xFF && buf[i] != readp[i])
+ return -EBADMSG;
+
+ return 0;
+}
+
+/**
+ * onenand_verify - [GENERIC] verify the chip contents after a write
+ * @param mtd MTD device structure
+ * @param buf the databuffer to verify
+ * @param addr offset to read from
+ * @param len number of bytes to read and compare
*
- * Check DataRAM area directly
*/
-static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr)
+static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
{
struct onenand_chip *this = mtd->priv;
- void __iomem *dataram0, *dataram1;
+ void __iomem *dataram;
int ret = 0;
+ int thislen, column;
- this->command(mtd, ONENAND_CMD_READ, addr, mtd->oobblock);
+ while (len != 0) {
+ thislen = min_t(int, mtd->writesize, len);
+ column = addr & (mtd->writesize - 1);
+ if (column + thislen > mtd->writesize)
+ thislen = mtd->writesize - column;
- ret = this->wait(mtd, FL_READING);
- if (ret)
- return ret;
+ this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize);
+
+ onenand_update_bufferram(mtd, addr, 0);
- onenand_update_bufferram(mtd, addr, 1);
+ ret = this->wait(mtd, FL_READING);
+ if (ret)
+ return ret;
- /* Check, if the two dataram areas are same */
- dataram0 = this->base + ONENAND_DATARAM;
- dataram1 = dataram0 + mtd->oobblock;
+ onenand_update_bufferram(mtd, addr, 1);
- if (memcmp(dataram0, dataram1, mtd->oobblock))
- return -EBADMSG;
+ dataram = this->base + ONENAND_DATARAM;
+ dataram += onenand_bufferram_offset(mtd, ONENAND_DATARAM);
+
+ if (memcmp(buf, dataram + column, thislen))
+ return -EBADMSG;
+
+ len -= thislen;
+ buf += thislen;
+ addr += thislen;
+ }
return 0;
}
#else
-#define onenand_verify_page(...) (0)
+#define onenand_verify(...) (0)
+#define onenand_verify_oob(...) (0)
#endif
-#define NOTALIGNED(x) ((x & (mtd->oobblock - 1)) != 0)
+#define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
/**
- * onenand_write_ecc - [MTD Interface] OneNAND write with ECC
+ * onenand_write - [MTD Interface] write buffer to FLASH
* @param mtd MTD device structure
* @param to offset to write to
* @param len number of bytes to write
* @param retlen pointer to variable to store the number of written bytes
* @param buf the data to write
- * @param eccbuf filesystem supplied oob data buffer
- * @param oobsel oob selection structure
*
- * OneNAND write with ECC
+ * Write with ECC
*/
-static int onenand_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 onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
{
struct onenand_chip *this = mtd->priv;
int written = 0;
int ret = 0;
+ int column, subpage;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_ecc: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
*retlen = 0;
/* Do not allow writes past end of device */
if (unlikely((to + len) > mtd->size)) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_ecc: Attempt write to past end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt write to past end of device\n");
return -EINVAL;
}
/* Reject writes, which are not page aligned */
if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_ecc: Attempt to write not page aligned data\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt to write not page aligned data\n");
return -EINVAL;
}
+ column = to & (mtd->writesize - 1);
+ subpage = column || (len & (mtd->writesize - 1));
+
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_WRITING);
/* Loop until all data write */
while (written < len) {
- int thislen = min_t(int, mtd->oobblock, len - written);
-
- this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobblock);
+ int bytes = mtd->writesize;
+ int thislen = min_t(int, bytes, len - written);
+ u_char *wbuf = (u_char *) buf;
+
+ cond_resched();
+
+ this->command(mtd, ONENAND_CMD_BUFFERRAM, to, bytes);
+
+ /* Partial page write */
+ if (subpage) {
+ bytes = min_t(int, bytes - column, (int) len);
+ memset(this->page_buf, 0xff, mtd->writesize);
+ memcpy(this->page_buf + column, buf, bytes);
+ wbuf = this->page_buf;
+ /* Even though partial write, we need page size */
+ thislen = mtd->writesize;
+ }
- this->write_bufferram(mtd, ONENAND_DATARAM, buf, 0, thislen);
+ this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, thislen);
this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
- this->command(mtd, ONENAND_CMD_PROG, to, mtd->oobblock);
+ this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
- onenand_update_bufferram(mtd, to, 1);
+ /* In partial page write we don't update bufferram */
+ onenand_update_bufferram(mtd, to, !subpage);
ret = this->wait(mtd, FL_WRITING);
if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_ecc: write filaed %d\n", ret);
- goto out;
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: write filaed %d\n", ret);
+ break;
}
- written += thislen;
-
/* Only check verify write turn on */
- ret = onenand_verify_page(mtd, (u_char *) buf, to);
+ ret = onenand_verify(mtd, (u_char *) wbuf, to, thislen);
if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_ecc: verify failed %d\n", ret);
- goto out;
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: verify failed %d\n", ret);
+ break;
}
+ written += thislen;
if (written == len)
break;
+ column = 0;
to += thislen;
buf += thislen;
}
-out:
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
}
/**
- * onenand_write - [MTD Interface] compability function for onenand_write_ecc
+ * onenand_fill_auto_oob - [Internal] oob auto-placement transfer
* @param mtd MTD device structure
- * @param to offset to write to
- * @param len number of bytes to write
- * @param retlen pointer to variable to store the number of written bytes
- * @param buf the data to write
- *
- * This function simply calls onenand_write_ecc
- * with oob buffer and oobsel = NULL
+ * @param oob_buf oob buffer
+ * @param buf source address
+ * @param column oob offset to write to
+ * @param thislen oob length to write
*/
-static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
+static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
+ const u_char *buf, int column, int thislen)
{
- return onenand_write_ecc(mtd, to, len, retlen, buf, NULL, NULL);
+ struct onenand_chip *this = mtd->priv;
+ struct nand_oobfree *free;
+ int writecol = column;
+ int writeend = column + thislen;
+ int lastgap = 0;
+
+ for (free = this->ecclayout->oobfree; free->length; ++free) {
+ if (writecol >= lastgap)
+ writecol += free->offset - lastgap;
+ if (writeend >= lastgap)
+ writeend += free->offset - lastgap;
+ lastgap = free->offset + free->length;
+ }
+ for (free = this->ecclayout->oobfree; free->length; ++free) {
+ int free_end = free->offset + free->length;
+ if (free->offset < writeend && free_end > writecol) {
+ int st = max_t(int,free->offset,writecol);
+ int ed = min_t(int,free_end,writeend);
+ int n = ed - st;
+ memcpy(oob_buf + st, buf, n);
+ buf += n;
+ }
+ }
+ return 0;
}
/**
- * onenand_write_oob - [MTD Interface] OneNAND write out-of-band
+ * onenand_do_write_oob - [Internal] OneNAND write out-of-band
* @param mtd MTD device structure
* @param to offset to write to
* @param len number of bytes to write
* @param retlen pointer to variable to store the number of written bytes
* @param buf the data to write
+ * @param mode operation mode
*
* OneNAND write out-of-band
*/
-static int onenand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
+static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf, mtd_oob_mode_t mode)
{
struct onenand_chip *this = mtd->priv;
- int column, status;
+ int column, ret = 0, oobsize;
int written = 0;
DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
*retlen = 0;
- /* Do not allow writes past end of device */
- if (unlikely((to + len) > mtd->size)) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempt write to past end of device\n");
+ if (mode == MTD_OOB_AUTO)
+ oobsize = this->ecclayout->oobavail;
+ else
+ oobsize = mtd->oobsize;
+
+ column = to & (mtd->oobsize - 1);
+
+ if (unlikely(column >= oobsize)) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempted to start write outside oob\n");
+ return -EINVAL;
+ }
+
+ /* Do not allow reads past end of device */
+ if (unlikely(to >= mtd->size ||
+ column + len > ((mtd->size >> this->page_shift) -
+ (to >> this->page_shift)) * oobsize)) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempted to write past end of device\n");
return -EINVAL;
}
/* Loop until all data write */
while (written < len) {
- int thislen = min_t(int, mtd->oobsize, len - written);
+ int thislen = min_t(int, oobsize, len - written);
- column = to & (mtd->oobsize - 1);
+ cond_resched();
this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
- this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
- this->write_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
+ /* We send data to spare ram with oobsize
+ * to prevent byte access */
+ memset(this->page_buf, 0xff, mtd->oobsize);
+ if (mode == MTD_OOB_AUTO)
+ onenand_fill_auto_oob(mtd, this->page_buf, buf, column, thislen);
+ else
+ memcpy(this->page_buf + column, buf, thislen);
+ this->write_bufferram(mtd, ONENAND_SPARERAM, this->page_buf, 0, mtd->oobsize);
this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
onenand_update_bufferram(mtd, to, 0);
- status = this->wait(mtd, FL_WRITING);
- if (status)
- goto out;
+ ret = this->wait(mtd, FL_WRITING);
+ if (ret) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: write failed %d\n", ret);
+ break;
+ }
+
+ ret = onenand_verify_oob(mtd, this->page_buf, to);
+ if (ret) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: verify failed %d\n", ret);
+ break;
+ }
written += thislen;
-
if (written == len)
break;
- to += thislen;
+ to += mtd->writesize;
buf += thislen;
+ column = 0;
}
-out:
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
*retlen = written;
- return 0;
+ return ret;
+}
+
+/**
+ * onenand_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 onenand_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ switch (ops->mode) {
+ case MTD_OOB_PLACE:
+ case MTD_OOB_AUTO:
+ break;
+ case MTD_OOB_RAW:
+ /* Not implemented yet */
+ default:
+ return -EINVAL;
+ }
+ return onenand_do_write_oob(mtd, to + ops->ooboffs, ops->ooblen,
+ &ops->oobretlen, ops->oobbuf, ops->mode);
}
/**
- * onenand_writev_ecc - [MTD Interface] write with iovec with ecc
+ * onenand_block_checkbad - [GENERIC] Check if a block is marked bad
* @param mtd MTD device structure
- * @param vecs the iovectors to write
- * @param count number of vectors
- * @param to offset to write to
- * @param retlen pointer to variable to store the number of written bytes
- * @param eccbuf filesystem supplied oob data buffer
- * @param oobsel oob selection structure
+ * @param ofs offset from device start
+ * @param getchip 0, if the chip is already selected
+ * @param allowbbt 1, if its allowed to access the bbt area
*
- * OneNAND write with iovec with ecc
+ * Check, if the block is bad. Either by reading the bad block table or
+ * calling of the scan function.
*/
-static int onenand_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 onenand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt)
{
struct onenand_chip *this = mtd->priv;
- unsigned char *pbuf;
- size_t total_len, len;
- int i, written = 0;
- int ret = 0;
+ struct bbm_info *bbm = this->bbm;
- /* Preset written len for early exit */
- *retlen = 0;
+ /* Return info from the table */
+ return bbm->isbad_bbt(mtd, ofs, allowbbt);
+}
- /* Calculate total length of data */
- total_len = 0;
- for (i = 0; i < count; i++)
- total_len += vecs[i].iov_len;
+/**
+ * onenand_erase - [MTD Interface] erase block(s)
+ * @param mtd MTD device structure
+ * @param instr erase instruction
+ *
+ * Erase one ore more blocks
+ */
+static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ struct onenand_chip *this = mtd->priv;
+ unsigned int block_size;
+ loff_t addr;
+ int len;
+ int ret = 0;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_writev_ecc: to = 0x%08x, len = %i, count = %ld\n", (unsigned int) to, (unsigned int) total_len, count);
-
- /* Do not allow write past end of the device */
- if (unlikely((to + total_len) > mtd->size)) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: Attempted write past end of device\n");
- return -EINVAL;
- }
-
- /* Reject writes, which are not page aligned */
- if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(total_len))) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: Attempt to write not page aligned data\n");
- return -EINVAL;
- }
-
- /* Grab the lock and see if the device is available */
- onenand_get_device(mtd, FL_WRITING);
-
- /* TODO handling oob */
-
- /* Loop until all keve's data has been written */
- len = 0;
- while (count) {
- pbuf = this->page_buf;
- /*
- * If the given tuple is >= pagesize then
- * write it out from the iov
- */
- if ((vecs->iov_len - len) >= mtd->oobblock) {
- pbuf = vecs->iov_base + len;
-
- len += mtd->oobblock;
-
- /* Check, if we have to switch to the next tuple */
- if (len >= (int) vecs->iov_len) {
- vecs++;
- len = 0;
- count--;
- }
- } else {
- int cnt = 0, thislen;
- while (cnt < mtd->oobblock) {
- thislen = min_t(int, mtd->oobblock - cnt, vecs->iov_len - len);
- memcpy(this->page_buf + cnt, vecs->iov_base + len, thislen);
- cnt += thislen;
- len += thislen;
-
- /* Check, if we have to switch to the next tuple */
- if (len >= (int) vecs->iov_len) {
- vecs++;
- len = 0;
- count--;
- }
- }
- }
-
- this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobblock);
-
- this->write_bufferram(mtd, ONENAND_DATARAM, pbuf, 0, mtd->oobblock);
- this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
-
- this->command(mtd, ONENAND_CMD_PROG, to, mtd->oobblock);
-
- onenand_update_bufferram(mtd, to, 1);
-
- ret = this->wait(mtd, FL_WRITING);
- if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: write failed %d\n", ret);
- goto out;
- }
-
-
- /* Only check verify write turn on */
- ret = onenand_verify_page(mtd, (u_char *) pbuf, to);
- if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: verify failed %d\n", ret);
- goto out;
- }
-
- written += mtd->oobblock;
-
- to += mtd->oobblock;
- }
-
-out:
- /* Deselect and wakt up anyone waiting on the device */
- onenand_release_device(mtd);
-
- *retlen = written;
-
- return 0;
-}
-
-/**
- * onenand_writev - [MTD Interface] compabilty function for onenand_writev_ecc
- * @param mtd MTD device structure
- * @param vecs the iovectors to write
- * @param count number of vectors
- * @param to offset to write to
- * @param retlen pointer to variable to store the number of written bytes
- *
- * OneNAND write with kvec. This just calls the ecc function
- */
-static int onenand_writev(struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t *retlen)
-{
- return onenand_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL);
-}
-
-/**
- * onenand_block_checkbad - [GENERIC] Check if a block is marked bad
- * @param mtd MTD device structure
- * @param ofs offset from device start
- * @param getchip 0, if the chip is already selected
- * @param allowbbt 1, if its allowed to access the bbt area
- *
- * Check, if the block is bad. Either by reading the bad block table or
- * calling of the scan function.
- */
-static int onenand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt)
-{
- struct onenand_chip *this = mtd->priv;
- struct bbm_info *bbm = this->bbm;
-
- /* Return info from the table */
- return bbm->isbad_bbt(mtd, ofs, allowbbt);
-}
-
-/**
- * onenand_erase - [MTD Interface] erase block(s)
- * @param mtd MTD device structure
- * @param instr erase instruction
- *
- * Erase one ore more blocks
- */
-static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
-{
- struct onenand_chip *this = mtd->priv;
- unsigned int block_size;
- loff_t addr;
- int len;
- int ret = 0;
-
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n", (unsigned int) instr->addr, (unsigned int) instr->len);
+ DEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n", (unsigned int) instr->addr, (unsigned int) instr->len);
block_size = (1 << this->erase_shift);
instr->state = MTD_ERASING;
while (len) {
+ cond_resched();
/* Check if we have a bad block, we do not erase bad blocks */
if (onenand_block_checkbad(mtd, addr, 0, 0)) {
ret = this->wait(mtd, FL_ERASING);
/* Check, if it is write protected */
if (ret) {
- if (ret == -EPERM)
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Device is write protected!!!\n");
- else
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift));
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift));
instr->state = MTD_ERASE_FAILED;
instr->fail_addr = addr;
goto erase_exit;
onenand_release_device(mtd);
}
-
/**
* onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
* @param mtd MTD device structure
/* We write two bytes, so we dont have to mess with 16 bit access */
ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
- return mtd->write_oob(mtd, ofs , 2, &retlen, buf);
+ return onenand_do_write_oob(mtd, ofs , 2, &retlen, buf, MTD_OOB_PLACE);
}
/**
}
/**
- * onenand_unlock - [MTD Interface] Unlock block(s)
+ * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s)
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
- * @param len number of bytes to unlock
+ * @param len number of bytes to lock or unlock
*
- * Unlock one or more blocks
+ * Lock or unlock one or more blocks
*/
-static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd)
{
struct onenand_chip *this = mtd->priv;
int start, end, block, value, status;
+ int wp_status_mask;
start = ofs >> this->erase_shift;
end = len >> this->erase_shift;
+ if (cmd == ONENAND_CMD_LOCK)
+ wp_status_mask = ONENAND_WP_LS;
+ else
+ wp_status_mask = ONENAND_WP_US;
+
/* Continuous lock scheme */
- if (this->options & ONENAND_CONT_LOCK) {
+ if (this->options & ONENAND_HAS_CONT_LOCK) {
/* Set start block address */
this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
/* Set end block address */
- this->write_word(end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS);
- /* Write unlock command */
- this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
+ this->write_word(start + end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS);
+ /* Write lock command */
+ this->command(mtd, cmd, 0, 0);
/* There's no return value */
- this->wait(mtd, FL_UNLOCKING);
+ this->wait(mtd, FL_LOCKING);
/* Sanity check */
while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
- if (!(status & ONENAND_WP_US))
+ if (!(status & wp_status_mask))
printk(KERN_ERR "wp status = 0x%x\n", status);
return 0;
}
/* Block lock scheme */
- for (block = start; block < end; block++) {
+ for (block = start; block < start + end; block++) {
/* Set block address */
value = onenand_block_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
/* Set start block address */
this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
- /* Write unlock command */
- this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
+ /* Write lock command */
+ this->command(mtd, cmd, 0, 0);
/* There's no return value */
- this->wait(mtd, FL_UNLOCKING);
+ this->wait(mtd, FL_LOCKING);
/* Sanity check */
while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
& ONENAND_CTRL_ONGO)
continue;
+ /* Check lock status */
+ status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
+ if (!(status & wp_status_mask))
+ printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
+ }
+
+ return 0;
+}
+
+/**
+ * onenand_lock - [MTD Interface] Lock block(s)
+ * @param mtd MTD device structure
+ * @param ofs offset relative to mtd start
+ * @param len number of bytes to unlock
+ *
+ * Lock one or more blocks
+ */
+static int onenand_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+ return onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK);
+}
+
+/**
+ * onenand_unlock - [MTD Interface] Unlock block(s)
+ * @param mtd MTD device structure
+ * @param ofs offset relative to mtd start
+ * @param len number of bytes to unlock
+ *
+ * Unlock one or more blocks
+ */
+static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+ return onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
+}
+
+/**
+ * onenand_check_lock_status - [OneNAND Interface] Check lock status
+ * @param this onenand chip data structure
+ *
+ * Check lock status
+ */
+static void onenand_check_lock_status(struct onenand_chip *this)
+{
+ unsigned int value, block, status;
+ unsigned int end;
+
+ end = this->chipsize >> this->erase_shift;
+ for (block = 0; block < end; block++) {
+ /* Set block address */
+ value = onenand_block_address(this, block);
+ this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
+ /* Select DataRAM for DDP */
+ value = onenand_bufferram_address(this, block);
+ this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
+ /* Set start block address */
+ this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
+
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
if (!(status & ONENAND_WP_US))
printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
}
+}
+
+/**
+ * onenand_unlock_all - [OneNAND Interface] unlock all blocks
+ * @param mtd MTD device structure
+ *
+ * Unlock all blocks
+ */
+static int onenand_unlock_all(struct mtd_info *mtd)
+{
+ struct onenand_chip *this = mtd->priv;
+
+ if (this->options & ONENAND_HAS_UNLOCK_ALL) {
+ /* Set start block address */
+ this->write_word(0, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
+ /* Write unlock command */
+ this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
+
+ /* There's no return value */
+ this->wait(mtd, FL_LOCKING);
+
+ /* Sanity check */
+ while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
+ & ONENAND_CTRL_ONGO)
+ continue;
+
+ /* Workaround for all block unlock in DDP */
+ if (ONENAND_IS_DDP(this)) {
+ /* 1st block on another chip */
+ loff_t ofs = this->chipsize >> 1;
+ size_t len = mtd->erasesize;
+
+ onenand_unlock(mtd, ofs, len);
+ }
+
+ onenand_check_lock_status(this);
+
+ return 0;
+ }
+
+ onenand_unlock(mtd, 0x0, this->chipsize);
+
+ return 0;
+}
+
+#ifdef CONFIG_MTD_ONENAND_OTP
+
+/* Interal OTP operation */
+typedef int (*otp_op_t)(struct mtd_info *mtd, loff_t form, size_t len,
+ size_t *retlen, u_char *buf);
+
+/**
+ * do_otp_read - [DEFAULT] Read OTP block area
+ * @param mtd MTD device structure
+ * @param from The offset to read
+ * @param len number of bytes to read
+ * @param retlen pointer to variable to store the number of readbytes
+ * @param buf the databuffer to put/get data
+ *
+ * Read OTP block area.
+ */
+static int do_otp_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ struct onenand_chip *this = mtd->priv;
+ int ret;
+
+ /* Enter OTP access mode */
+ this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
+ this->wait(mtd, FL_OTPING);
+
+ ret = mtd->read(mtd, from, len, retlen, buf);
+
+ /* Exit OTP access mode */
+ this->command(mtd, ONENAND_CMD_RESET, 0, 0);
+ this->wait(mtd, FL_RESETING);
+
+ return ret;
+}
+
+/**
+ * do_otp_write - [DEFAULT] Write OTP block area
+ * @param mtd MTD device structure
+ * @param from The offset to write
+ * @param len number of bytes to write
+ * @param retlen pointer to variable to store the number of write bytes
+ * @param buf the databuffer to put/get data
+ *
+ * Write OTP block area.
+ */
+static int do_otp_write(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ struct onenand_chip *this = mtd->priv;
+ unsigned char *pbuf = buf;
+ int ret;
+
+ /* Force buffer page aligned */
+ if (len < mtd->writesize) {
+ memcpy(this->page_buf, buf, len);
+ memset(this->page_buf + len, 0xff, mtd->writesize - len);
+ pbuf = this->page_buf;
+ len = mtd->writesize;
+ }
+
+ /* Enter OTP access mode */
+ this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
+ this->wait(mtd, FL_OTPING);
+
+ ret = mtd->write(mtd, from, len, retlen, pbuf);
+
+ /* Exit OTP access mode */
+ this->command(mtd, ONENAND_CMD_RESET, 0, 0);
+ this->wait(mtd, FL_RESETING);
+
+ return ret;
+}
+
+/**
+ * do_otp_lock - [DEFAULT] Lock OTP block area
+ * @param mtd MTD device structure
+ * @param from The offset to lock
+ * @param len number of bytes to lock
+ * @param retlen pointer to variable to store the number of lock bytes
+ * @param buf the databuffer to put/get data
+ *
+ * Lock OTP block area.
+ */
+static int do_otp_lock(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ struct onenand_chip *this = mtd->priv;
+ int ret;
+
+ /* Enter OTP access mode */
+ this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
+ this->wait(mtd, FL_OTPING);
+
+ ret = onenand_do_write_oob(mtd, from, len, retlen, buf, MTD_OOB_PLACE);
+
+ /* Exit OTP access mode */
+ this->command(mtd, ONENAND_CMD_RESET, 0, 0);
+ this->wait(mtd, FL_RESETING);
+
+ return ret;
+}
+
+/**
+ * onenand_otp_walk - [DEFAULT] Handle OTP operation
+ * @param mtd MTD device structure
+ * @param from The offset to read/write
+ * @param len number of bytes to read/write
+ * @param retlen pointer to variable to store the number of read bytes
+ * @param buf the databuffer to put/get data
+ * @param action do given action
+ * @param mode specify user and factory
+ *
+ * Handle OTP operation.
+ */
+static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf,
+ otp_op_t action, int mode)
+{
+ struct onenand_chip *this = mtd->priv;
+ int otp_pages;
+ int density;
+ int ret = 0;
+
+ *retlen = 0;
+
+ density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+ if (density < ONENAND_DEVICE_DENSITY_512Mb)
+ otp_pages = 20;
+ else
+ otp_pages = 10;
+
+ if (mode == MTD_OTP_FACTORY) {
+ from += mtd->writesize * otp_pages;
+ otp_pages = 64 - otp_pages;
+ }
+
+ /* Check User/Factory boundary */
+ if (((mtd->writesize * otp_pages) - (from + len)) < 0)
+ return 0;
+
+ while (len > 0 && otp_pages > 0) {
+ if (!action) { /* OTP Info functions */
+ struct otp_info *otpinfo;
+
+ len -= sizeof(struct otp_info);
+ if (len <= 0)
+ return -ENOSPC;
+
+ otpinfo = (struct otp_info *) buf;
+ otpinfo->start = from;
+ otpinfo->length = mtd->writesize;
+ otpinfo->locked = 0;
+
+ from += mtd->writesize;
+ buf += sizeof(struct otp_info);
+ *retlen += sizeof(struct otp_info);
+ } else {
+ size_t tmp_retlen;
+ int size = len;
+
+ ret = action(mtd, from, len, &tmp_retlen, buf);
+
+ buf += size;
+ len -= size;
+ *retlen += size;
+
+ if (ret < 0)
+ return ret;
+ }
+ otp_pages--;
+ }
return 0;
}
+/**
+ * onenand_get_fact_prot_info - [MTD Interface] Read factory OTP info
+ * @param mtd MTD device structure
+ * @param buf the databuffer to put/get data
+ * @param len number of bytes to read
+ *
+ * Read factory OTP info.
+ */
+static int onenand_get_fact_prot_info(struct mtd_info *mtd,
+ struct otp_info *buf, size_t len)
+{
+ size_t retlen;
+ int ret;
+
+ ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_FACTORY);
+
+ return ret ? : retlen;
+}
+
+/**
+ * onenand_read_fact_prot_reg - [MTD Interface] Read factory OTP area
+ * @param mtd MTD device structure
+ * @param from The offset to read
+ * @param len number of bytes to read
+ * @param retlen pointer to variable to store the number of read bytes
+ * @param buf the databuffer to put/get data
+ *
+ * Read factory OTP area.
+ */
+static int onenand_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len, size_t *retlen, u_char *buf)
+{
+ return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_FACTORY);
+}
+
+/**
+ * onenand_get_user_prot_info - [MTD Interface] Read user OTP info
+ * @param mtd MTD device structure
+ * @param buf the databuffer to put/get data
+ * @param len number of bytes to read
+ *
+ * Read user OTP info.
+ */
+static int onenand_get_user_prot_info(struct mtd_info *mtd,
+ struct otp_info *buf, size_t len)
+{
+ size_t retlen;
+ int ret;
+
+ ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_USER);
+
+ return ret ? : retlen;
+}
+
+/**
+ * onenand_read_user_prot_reg - [MTD Interface] Read user OTP area
+ * @param mtd MTD device structure
+ * @param from The offset to read
+ * @param len number of bytes to read
+ * @param retlen pointer to variable to store the number of read bytes
+ * @param buf the databuffer to put/get data
+ *
+ * Read user OTP area.
+ */
+static int onenand_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len, size_t *retlen, u_char *buf)
+{
+ return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_USER);
+}
+
+/**
+ * onenand_write_user_prot_reg - [MTD Interface] Write user OTP area
+ * @param mtd MTD device structure
+ * @param from The offset to write
+ * @param len number of bytes to write
+ * @param retlen pointer to variable to store the number of write bytes
+ * @param buf the databuffer to put/get data
+ *
+ * Write user OTP area.
+ */
+static int onenand_write_user_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len, size_t *retlen, u_char *buf)
+{
+ return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_write, MTD_OTP_USER);
+}
+
+/**
+ * onenand_lock_user_prot_reg - [MTD Interface] Lock user OTP area
+ * @param mtd MTD device structure
+ * @param from The offset to lock
+ * @param len number of bytes to unlock
+ *
+ * Write lock mark on spare area in page 0 in OTP block
+ */
+static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
+ size_t len)
+{
+ unsigned char oob_buf[64];
+ size_t retlen;
+ int ret;
+
+ memset(oob_buf, 0xff, mtd->oobsize);
+ /*
+ * Note: OTP lock operation
+ * OTP block : 0xXXFC
+ * 1st block : 0xXXF3 (If chip support)
+ * Both : 0xXXF0 (If chip support)
+ */
+ oob_buf[ONENAND_OTP_LOCK_OFFSET] = 0xFC;
+
+ /*
+ * Write lock mark to 8th word of sector0 of page0 of the spare0.
+ * We write 16 bytes spare area instead of 2 bytes.
+ */
+ from = 0;
+ len = 16;
+
+ ret = onenand_otp_walk(mtd, from, len, &retlen, oob_buf, do_otp_lock, MTD_OTP_USER);
+
+ return ret ? : retlen;
+}
+#endif /* CONFIG_MTD_ONENAND_OTP */
+
+/**
+ * onenand_check_features - Check and set OneNAND features
+ * @param mtd MTD data structure
+ *
+ * Check and set OneNAND features
+ * - lock scheme
+ */
+static void onenand_check_features(struct mtd_info *mtd)
+{
+ struct onenand_chip *this = mtd->priv;
+ unsigned int density, process;
+
+ /* Lock scheme depends on density and process */
+ density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+ process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT;
+
+ /* Lock scheme */
+ if (density >= ONENAND_DEVICE_DENSITY_1Gb) {
+ /* A-Die has all block unlock */
+ if (process) {
+ printk(KERN_DEBUG "Chip support all block unlock\n");
+ this->options |= ONENAND_HAS_UNLOCK_ALL;
+ }
+ } else {
+ /* Some OneNAND has continues lock scheme */
+ if (!process) {
+ printk(KERN_DEBUG "Lock scheme is Continues Lock\n");
+ this->options |= ONENAND_HAS_CONT_LOCK;
+ }
+ }
+}
+
/**
* onenand_print_device_info - Print device ID
* @param device device ID
*
* Print device ID
*/
-static void onenand_print_device_info(int device)
+static void onenand_print_device_info(int device, int version)
{
int vcc, demuxed, ddp, density;
(16 << density),
vcc ? "2.65/3.3" : "1.8",
device);
+ printk(KERN_DEBUG "OneNAND version = 0x%04x\n", version);
}
static const struct onenand_manufacturers onenand_manuf_ids[] = {
static int onenand_probe(struct mtd_info *mtd)
{
struct onenand_chip *this = mtd->priv;
- int bram_maf_id, bram_dev_id, maf_id, dev_id;
- int version_id;
+ int bram_maf_id, bram_dev_id, maf_id, dev_id, ver_id;
int density;
+ int syscfg;
+
+ /* Save system configuration 1 */
+ syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
+ /* Clear Sync. Burst Read mode to read BootRAM */
+ this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ), this->base + ONENAND_REG_SYS_CFG1);
/* Send the command for reading device ID from BootRAM */
this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM);
bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0);
bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2);
+ /* Reset OneNAND to read default register values */
+ this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
+ /* Wait reset */
+ this->wait(mtd, FL_RESETING);
+
+ /* Restore system configuration 1 */
+ this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
+
/* Check manufacturer ID */
if (onenand_check_maf(bram_maf_id))
return -ENXIO;
- /* Reset OneNAND to read default register values */
- this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
-
/* Read manufacturer and device IDs from Register */
maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
+ ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
/* Check OneNAND device */
if (maf_id != bram_maf_id || dev_id != bram_dev_id)
return -ENXIO;
/* Flash device information */
- onenand_print_device_info(dev_id);
+ onenand_print_device_info(dev_id, ver_id);
this->device_id = dev_id;
+ this->version_id = ver_id;
density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
this->chipsize = (16 << density) << 20;
/* Set density mask. it is used for DDP */
- this->density_mask = (1 << (density + 6));
+ if (ONENAND_IS_DDP(this))
+ this->density_mask = (1 << (density + 6));
+ else
+ this->density_mask = 0;
/* OneNAND page size & block size */
/* The data buffer size is equal to page size */
- mtd->oobblock = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
- mtd->oobsize = mtd->oobblock >> 5;
- /* Pagers per block is always 64 in OneNAND */
- mtd->erasesize = mtd->oobblock << 6;
+ mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
+ mtd->oobsize = mtd->writesize >> 5;
+ /* Pages per a block are always 64 in OneNAND */
+ mtd->erasesize = mtd->writesize << 6;
this->erase_shift = ffs(mtd->erasesize) - 1;
- this->page_shift = ffs(mtd->oobblock) - 1;
- this->ppb_shift = (this->erase_shift - this->page_shift);
- this->page_mask = (mtd->erasesize / mtd->oobblock) - 1;
+ this->page_shift = ffs(mtd->writesize) - 1;
+ this->page_mask = (1 << (this->erase_shift - this->page_shift)) - 1;
/* REVIST: Multichip handling */
mtd->size = this->chipsize;
- /* Version ID */
- version_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
- printk(KERN_DEBUG "OneNAND version = 0x%04x\n", version_id);
-
- /* Lock scheme */
- if (density <= ONENAND_DEVICE_DENSITY_512Mb &&
- !(version_id >> ONENAND_VERSION_PROCESS_SHIFT)) {
- printk(KERN_INFO "Lock scheme is Continues Lock\n");
- this->options |= ONENAND_CONT_LOCK;
- }
+ /* Check OneNAND features */
+ onenand_check_features(mtd);
return 0;
}
"in suspended state\n");
}
-
/**
* onenand_scan - [OneNAND Interface] Scan for the OneNAND device
* @param mtd MTD device structure
*/
int onenand_scan(struct mtd_info *mtd, int maxchips)
{
+ int i;
struct onenand_chip *this = mtd->priv;
if (!this->read_word)
if (!this->command)
this->command = onenand_command;
if (!this->wait)
- this->wait = onenand_wait;
+ onenand_setup_wait(mtd);
if (!this->read_bufferram)
this->read_bufferram = onenand_read_bufferram;
/* Allocate buffers, if necessary */
if (!this->page_buf) {
size_t len;
- len = mtd->oobblock + mtd->oobsize;
+ len = mtd->writesize + mtd->oobsize;
this->page_buf = kmalloc(len, GFP_KERNEL);
if (!this->page_buf) {
printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n");
init_waitqueue_head(&this->wq);
spin_lock_init(&this->chip_lock);
+ /*
+ * Allow subpage writes up to oobsize.
+ */
switch (mtd->oobsize) {
case 64:
- this->autooob = &onenand_oob_64;
+ this->ecclayout = &onenand_oob_64;
+ mtd->subpage_sft = 2;
break;
case 32:
- this->autooob = &onenand_oob_32;
+ this->ecclayout = &onenand_oob_32;
+ mtd->subpage_sft = 1;
break;
default:
printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n",
mtd->oobsize);
+ mtd->subpage_sft = 0;
/* To prevent kernel oops */
- this->autooob = &onenand_oob_32;
+ this->ecclayout = &onenand_oob_32;
break;
}
- memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo));
+ this->subpagesize = mtd->writesize >> mtd->subpage_sft;
+
+ /*
+ * The number of bytes available for a client to place data into
+ * the out of band area
+ */
+ this->ecclayout->oobavail = 0;
+ for (i = 0; this->ecclayout->oobfree[i].length; i++)
+ this->ecclayout->oobavail +=
+ this->ecclayout->oobfree[i].length;
+
+ mtd->ecclayout = this->ecclayout;
/* 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 = onenand_erase;
mtd->point = NULL;
mtd->unpoint = NULL;
mtd->read = onenand_read;
mtd->write = onenand_write;
- mtd->read_ecc = onenand_read_ecc;
- mtd->write_ecc = onenand_write_ecc;
mtd->read_oob = onenand_read_oob;
mtd->write_oob = onenand_write_oob;
- mtd->readv = NULL;
- mtd->readv_ecc = NULL;
- mtd->writev = onenand_writev;
- mtd->writev_ecc = onenand_writev_ecc;
+#ifdef CONFIG_MTD_ONENAND_OTP
+ mtd->get_fact_prot_info = onenand_get_fact_prot_info;
+ mtd->read_fact_prot_reg = onenand_read_fact_prot_reg;
+ mtd->get_user_prot_info = onenand_get_user_prot_info;
+ mtd->read_user_prot_reg = onenand_read_user_prot_reg;
+ mtd->write_user_prot_reg = onenand_write_user_prot_reg;
+ mtd->lock_user_prot_reg = onenand_lock_user_prot_reg;
+#endif
mtd->sync = onenand_sync;
- mtd->lock = NULL;
+ mtd->lock = onenand_lock;
mtd->unlock = onenand_unlock;
mtd->suspend = onenand_suspend;
mtd->resume = onenand_resume;
mtd->owner = THIS_MODULE;
/* Unlock whole block */
- mtd->unlock(mtd, 0x0, this->chipsize);
+ onenand_unlock_all(mtd);
return this->scan_bbt(mtd);
}
del_mtd_device (mtd);
/* Free bad block table memory, if allocated */
- if (this->bbm)
+ if (this->bbm) {
+ struct bbm_info *bbm = this->bbm;
+ kfree(bbm->bbt);
kfree(this->bbm);
+ }
/* Buffer allocated by onenand_scan */
if (this->options & ONENAND_PAGEBUF_ALLOC)
kfree(this->page_buf);
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff