0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
-/*
- * NAND low-level MTD interface functions
- */
-static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len);
-static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len);
-static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len);
-
-static int nand_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, uint8_t *buf);
-static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, uint8_t *buf);
-static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const uint8_t *buf);
static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const uint8_t *buf);
-static int nand_erase(struct mtd_info *mtd, struct erase_info *instr);
-static void nand_sync(struct mtd_info *mtd);
-
-/* Some internal functions */
-static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
- int page, uint8_t * oob_buf,
- struct nand_oobinfo *oobsel, int mode);
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
-static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *chip,
- int page, int numpages, uint8_t *oob_buf,
- struct nand_oobinfo *oobsel, int chipnr,
- int oobmode);
-#else
-#define nand_verify_pages(...) (0)
-#endif
-
static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd,
int new_state);
for (i = 0; i < len; i++)
if (buf[i] != readb(chip->IO_ADDR_R))
return -EFAULT;
-
return 0;
}
return status;
}
-/**
- * nand_write_page - [GENERIC] write one page
- * @mtd: MTD device structure
- * @this: NAND chip structure
- * @page: startpage inside the chip, must be called with (page & chip->pagemask)
- * @oob_buf: out of band data buffer
- * @oobsel: out of band selecttion structre
- * @cached: 1 = enable cached programming if supported by chip
- *
- * Nand_page_program function is used for write and writev !
- * This function will always program a full page of data
- * If you call it with a non page aligned buffer, you're lost :)
- *
- * Cached programming is not supported yet.
- */
-static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, int page,
- uint8_t *oob_buf, struct nand_oobinfo *oobsel, int cached)
-{
- int i, status;
- uint8_t ecc_code[32];
- int eccmode = oobsel->useecc ? chip->ecc.mode : NAND_ECC_NONE;
- int *oob_config = oobsel->eccpos;
- int datidx = 0, eccidx = 0, eccsteps = chip->ecc.steps;
- int eccbytes = 0;
-
- /* FIXME: Enable cached programming */
- cached = 0;
-
- /* Send command to begin auto page programming */
- chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
-
- /* Write out complete page of data, take care of eccmode */
- switch (eccmode) {
- /* No ecc, write all */
- case NAND_ECC_NONE:
- printk(KERN_WARNING "Writing data without ECC to NAND-FLASH is not recommended\n");
- chip->write_buf(mtd, chip->data_poi, mtd->writesize);
- break;
-
- /* Software ecc 3/256, write all */
- case NAND_ECC_SOFT:
- for (; eccsteps; eccsteps--) {
- chip->ecc.calculate(mtd, &chip->data_poi[datidx], ecc_code);
- for (i = 0; i < 3; i++, eccidx++)
- oob_buf[oob_config[eccidx]] = ecc_code[i];
- datidx += chip->ecc.size;
- }
- chip->write_buf(mtd, chip->data_poi, mtd->writesize);
- break;
- default:
- eccbytes = chip->ecc.bytes;
- for (; eccsteps; eccsteps--) {
- /* enable hardware ecc logic for write */
- chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
- chip->write_buf(mtd, &chip->data_poi[datidx], chip->ecc.size);
- chip->ecc.calculate(mtd, &chip->data_poi[datidx], ecc_code);
- for (i = 0; i < eccbytes; i++, eccidx++)
- oob_buf[oob_config[eccidx]] = ecc_code[i];
- /* If the hardware ecc provides syndromes then
- * the ecc code must be written immidiately after
- * the data bytes (words) */
- if (chip->options & NAND_HWECC_SYNDROME)
- chip->write_buf(mtd, ecc_code, eccbytes);
- datidx += chip->ecc.size;
- }
- break;
- }
-
- /* Write out OOB data */
- if (chip->options & NAND_HWECC_SYNDROME)
- chip->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes);
- else
- chip->write_buf(mtd, oob_buf, mtd->oobsize);
-
- /* Send command to actually program the data */
- chip->cmdfunc(mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1);
-
- if (!cached) {
- /* call wait ready function */
- status = chip->waitfunc(mtd, chip, FL_WRITING);
-
- /* See if operation failed and additional status checks are available */
- if ((status & NAND_STATUS_FAIL) && (chip->errstat)) {
- status = chip->errstat(mtd, chip, FL_WRITING, status, page);
- }
-
- /* See if device thinks it succeeded */
- if (status & NAND_STATUS_FAIL) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write, page 0x%08x, ", __FUNCTION__, page);
- return -EIO;
- }
- } else {
- /* FIXME: Implement cached programming ! */
- /* wait until cache is ready */
- // status = chip->waitfunc (mtd, this, FL_CACHEDRPG);
- }
- return 0;
-}
-
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
-/**
- * nand_verify_pages - [GENERIC] verify the chip contents after a write
- * @mtd: MTD device structure
- * @this: NAND chip structure
- * @page: startpage inside the chip, must be called with (page & chip->pagemask)
- * @numpages: number of pages to verify
- * @oob_buf: out of band data buffer
- * @oobsel: out of band selecttion structre
- * @chipnr: number of the current chip
- * @oobmode: 1 = full buffer verify, 0 = ecc only
- *
- * The NAND device assumes that it is always writing to a cleanly erased page.
- * Hence, it performs its internal write verification only on bits that
- * transitioned from 1 to 0. The device does NOT verify the whole page on a
- * byte by byte basis. It is possible that the page was not completely erased
- * or the page is becoming unusable due to wear. The read with ECC would catch
- * the error later when the ECC page check fails, but we would rather catch
- * it early in the page write stage. Better to write no data than invalid data.
- */
-static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *chip, int page, int numpages,
- uint8_t *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode)
-{
- int i, j, datidx = 0, oobofs = 0, res = -EIO;
- int eccsteps = chip->ecc.steps;
- int hweccbytes;
- uint8_t oobdata[64];
-
- hweccbytes = (chip->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0;
-
- /* Send command to read back the first page */
- chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
-
- for (;;) {
- for (j = 0; j < eccsteps; j++) {
- /* Loop through and verify the data */
- if (chip->verify_buf(mtd, &chip->data_poi[datidx], mtd->eccsize)) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
- goto out;
- }
- datidx += mtd->eccsize;
- /* Have we a hw generator layout ? */
- if (!hweccbytes)
- continue;
- if (chip->verify_buf(mtd, &chip->oob_buf[oobofs], hweccbytes)) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
- goto out;
- }
- oobofs += hweccbytes;
- }
-
- /* check, if we must compare all data or if we just have to
- * compare the ecc bytes
- */
- if (oobmode) {
- if (chip->verify_buf(mtd, &oob_buf[oobofs], mtd->oobsize - hweccbytes * eccsteps)) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page);
- goto out;
- }
- } else {
- /* Read always, else autoincrement fails */
- chip->read_buf(mtd, oobdata, mtd->oobsize - hweccbytes * eccsteps);
-
- if (oobsel->useecc != MTD_NANDECC_OFF && !hweccbytes) {
- int ecccnt = oobsel->eccbytes;
-
- for (i = 0; i < ecccnt; i++) {
- int idx = oobsel->eccpos[i];
- if (oobdata[idx] != oob_buf[oobofs + idx]) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: Failed ECC write verify, page 0x%08x, %6i bytes were succesful\n",
- __FUNCTION__, page, i);
- goto out;
- }
- }
- }
- }
- oobofs += mtd->oobsize - hweccbytes * eccsteps;
- page++;
- numpages--;
-
- /* Apply delay or wait for ready/busy pin
- * Do this before the AUTOINCR check, so no problems
- * arise if a chip which does auto increment
- * is marked as NOAUTOINCR by the board driver.
- * Do this also before returning, so the chip is
- * ready for the next command.
- */
- if (!chip->dev_ready)
- udelay(chip->chip_delay);
- else
- nand_wait_ready(mtd);
-
- /* All done, return happy */
- if (!numpages)
- return 0;
-
- /* Check, if the chip supports auto page increment */
- if (!NAND_CANAUTOINCR(chip))
- chip->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:
- chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
- return res;
-}
-#endif
-
/**
* nand_read_page_swecc - {REPLACABLE] software ecc based page read function
* @mtd: mtd info structure
int eccbytes = chip->ecc.bytes;
int eccsteps = chip->ecc.steps;
uint8_t *p = buf;
- uint8_t *ecc_calc = chip->oob_buf + mtd->oobsize;
- uint8_t *ecc_code = ecc_calc + mtd->oobsize;
+ uint8_t *ecc_calc = chip->buffers.ecccalc;
+ uint8_t *ecc_code = chip->buffers.ecccode;
int *eccpos = chip->autooob->eccpos;
chip->read_buf(mtd, buf, mtd->writesize);
- chip->read_buf(mtd, chip->oob_buf, mtd->oobsize);
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
if (chip->ecc.mode == NAND_ECC_NONE)
return 0;
chip->ecc.calculate(mtd, p, &ecc_calc[i]);
for (i = 0; i < chip->ecc.total; i++)
- ecc_code[i] = chip->oob_buf[eccpos[i]];
+ ecc_code[i] = chip->oob_poi[eccpos[i]];
eccsteps = chip->ecc.steps;
p = buf;
int eccbytes = chip->ecc.bytes;
int eccsteps = chip->ecc.steps;
uint8_t *p = buf;
- uint8_t *ecc_calc = chip->oob_buf + mtd->oobsize;
- uint8_t *ecc_code = ecc_calc + mtd->oobsize;
+ uint8_t *ecc_calc = chip->buffers.ecccalc;
+ uint8_t *ecc_code = chip->buffers.ecccode;
int *eccpos = chip->autooob->eccpos;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
chip->read_buf(mtd, p, eccsize);
chip->ecc.calculate(mtd, p, &ecc_calc[i]);
}
- chip->read_buf(mtd, chip->oob_buf, mtd->oobsize);
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
for (i = 0; i < chip->ecc.total; i++)
- ecc_code[i] = chip->oob_buf[eccpos[i]];
+ ecc_code[i] = chip->oob_poi[eccpos[i]];
eccsteps = chip->ecc.steps;
p = buf;
* @buf: buffer to store read data
*
* The hw generator calculates the error syndrome automatically. Therefor
- * we need a special oob layout and .
+ * we need a special oob layout and handling.
*/
static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *buf)
int eccbytes = chip->ecc.bytes;
int eccsteps = chip->ecc.steps;
uint8_t *p = buf;
- uint8_t *oob = chip->oob_buf;
+ uint8_t *oob = chip->oob_poi;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
int stat;
}
/* Calculate remaining oob bytes */
- i = oob - chip->oob_buf;
+ i = oob - chip->oob_poi;
if (i)
chip->read_buf(mtd, oob, i);
page = realpage & chip->pagemask;
col = (int)(from & (mtd->writesize - 1));
+ chip->oob_poi = chip->buffers.oobrbuf;
while(1) {
bytes = min(mtd->writesize - col, readlen);
/* Is the current page in the buffer ? */
if (realpage != chip->pagebuf) {
- bufpoi = aligned ? buf : chip->data_buf;
+ bufpoi = aligned ? buf : chip->buffers.databuf;
if (likely(sndcmd)) {
chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
/* Transfer not aligned data */
if (!aligned) {
chip->pagebuf = realpage;
- memcpy(buf, chip->data_buf + col, bytes);
+ memcpy(buf, chip->buffers.databuf + col, bytes);
}
if (!(chip->options & NAND_NO_READRDY)) {
nand_wait_ready(mtd);
}
} else
- memcpy(buf, chip->data_buf + col, bytes);
+ memcpy(buf, chip->buffers.databuf + col, bytes);
buf += bytes;
readlen -= bytes;
blockcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
while (len) {
- if (sndcmd)
+ if (likely(sndcmd)) {
chip->cmdfunc(mtd, NAND_CMD_READ0, 0,
page & chip->pagemask);
- sndcmd = 0;
+ sndcmd = 0;
+ }
chip->read_buf(mtd, &buf[cnt], pagesize);
cnt += pagesize;
page++;
- if (!chip->dev_ready)
- udelay(chip->chip_delay);
- else
- nand_wait_ready(mtd);
+ if (!(chip->options & NAND_NO_READRDY)) {
+ if (!chip->dev_ready)
+ udelay(chip->chip_delay);
+ else
+ nand_wait_ready(mtd);
+ }
/*
* Check, if the chip supports auto page increment or if we
}
/**
- * nand_write_raw - [GENERIC] Write raw data including oob
- * @mtd: MTD device structure
- * @buf: source buffer
- * @to: offset to write to
- * @len: number of bytes to write
- * @buf: source buffer
- * @oob: oob buffer
- *
- * Write raw data including oob
+ * nand_write_page_swecc - {REPLACABLE] software ecc based page write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
*/
-int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
- uint8_t *buf, uint8_t *oob)
+static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
{
- struct nand_chip *chip = mtd->priv;
- int page = (int)(to >> chip->page_shift);
- int chipnr = (int)(to >> chip->chip_shift);
- int ret;
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *ecc_calc = chip->buffers.ecccalc;
+ const uint8_t *p = buf;
+ int *eccpos = chip->autooob->eccpos;
- *retlen = 0;
+ if (chip->ecc.mode != NAND_ECC_NONE) {
+ /* Software ecc calculation */
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
- /* Do not allow writes past end of device */
- if ((to + len) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt write "
- "beyond end of device\n");
- return -EINVAL;
+ for (i = 0; i < chip->ecc.total; i++)
+ chip->oob_poi[eccpos[i]] = ecc_calc[i];
}
- /* Grab the lock and see if the device is available */
- nand_get_device(chip, mtd, FL_WRITING);
+ chip->write_buf(mtd, buf, mtd->writesize);
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+}
- chip->select_chip(mtd, chipnr);
- chip->data_poi = buf;
+/**
+ * nand_write_page_hwecc - {REPLACABLE] hardware ecc based page write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
+ */
+static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *ecc_calc = chip->buffers.ecccalc;
+ const uint8_t *p = buf;
+ int *eccpos = chip->autooob->eccpos;
- while (len != *retlen) {
- ret = nand_write_page(mtd, chip, page, oob, &mtd->oobinfo, 0);
- if (ret)
- return ret;
- page++;
- *retlen += mtd->writesize;
- chip->data_poi += mtd->writesize;
- oob += mtd->oobsize;
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
+ chip->write_buf(mtd, p, mtd->writesize);
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
}
- /* Deselect and wake up anyone waiting on the device */
- nand_release_device(mtd);
- return 0;
+ for (i = 0; i < chip->ecc.total; i++)
+ chip->oob_poi[eccpos[i]] = ecc_calc[i];
+
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
}
-EXPORT_SYMBOL_GPL(nand_write_raw);
/**
- * 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
- * @autoplace: 1 = place given buffer into the oob bytes
- * @numpages: number of pages to prepare
- *
- * Return:
- * 1. Filesystem buffer available and autoplacement is off,
- * return filesystem buffer
- * 2. No filesystem buffer or autoplace is off, return internal
- * buffer
- * 3. Filesystem buffer is given and autoplace selected
- * put data from fs buffer into internal buffer and
- * retrun internal buffer
- *
- * Note: The internal buffer is filled with 0xff. This must
- * be done only once, when no autoplacement happens
- * Autoplacement sets the buffer dirty flag, which
- * forces the 0xff fill before using the buffer again.
+ * nand_write_page_syndrome - {REPLACABLE] hardware ecc syndrom based page write
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: data buffer
*
-*/
-static uint8_t *nand_prepare_oobbuf(struct mtd_info *mtd, uint8_t *fsbuf, struct nand_oobinfo *oobsel,
- int autoplace, int numpages)
+ * The hw generator calculates the error syndrome automatically. Therefor
+ * we need a special oob layout and handling.
+ */
+static void nand_write_page_syndrome(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
{
- struct nand_chip *chip = mtd->priv;
- int i, len, ofs;
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ const uint8_t *p = buf;
+ uint8_t *oob = chip->oob_poi;
- /* Zero copy fs supplied buffer */
- if (fsbuf && !autoplace)
- return fsbuf;
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- /* Check, if the buffer must be filled with ff again */
- if (chip->oobdirty) {
- memset(chip->oob_buf, 0xff, mtd->oobsize << (chip->phys_erase_shift - chip->page_shift));
- chip->oobdirty = 0;
- }
+ chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
+ chip->write_buf(mtd, p, eccsize);
- /* If we have no autoplacement or no fs buffer use the internal one */
- if (!autoplace || !fsbuf)
- return chip->oob_buf;
-
- /* Walk through the pages and place the data */
- chip->oobdirty = 1;
- ofs = 0;
- while (numpages--) {
- for (i = 0, len = 0; len < mtd->oobavail; i++) {
- int to = ofs + oobsel->oobfree[i][0];
- int num = oobsel->oobfree[i][1];
- memcpy(&chip->oob_buf[to], fsbuf, num);
- len += num;
- fsbuf += num;
+ if (chip->ecc.prepad) {
+ chip->write_buf(mtd, oob, chip->ecc.prepad);
+ oob += chip->ecc.prepad;
+ }
+
+ chip->ecc.calculate(mtd, p, oob);
+ chip->write_buf(mtd, oob, eccbytes);
+ oob += eccbytes;
+
+ if (chip->ecc.postpad) {
+ chip->write_buf(mtd, oob, chip->ecc.postpad);
+ oob += chip->ecc.postpad;
}
- ofs += mtd->oobavail;
}
- return chip->oob_buf;
+
+ /* Calculate remaining oob bytes */
+ i = oob - chip->oob_poi;
+ if (i)
+ chip->write_buf(mtd, oob, i);
+}
+
+/**
+ * nand_write_page - [INTERNAL] write one page
+ * @mtd: MTD device structure
+ * @chip: NAND chip descriptor
+ * @buf: the data to write
+ * @page: page number to write
+ * @cached: cached programming
+ */
+static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf, int page, int cached)
+{
+ int status;
+
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
+
+ chip->ecc.write_page(mtd, chip, buf);
+
+ /*
+ * Cached progamming disabled for now, Not sure if its worth the
+ * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s)
+ */
+ cached = 0;
+
+ if (!cached || !(chip->options & NAND_CACHEPRG)) {
+
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip, FL_WRITING);
+ /*
+ * See if operation failed and additional status checks are
+ * available
+ */
+ if ((status & NAND_STATUS_FAIL) && (chip->errstat))
+ status = chip->errstat(mtd, chip, FL_WRITING, status,
+ page);
+
+ if (status & NAND_STATUS_FAIL)
+ return -EIO;
+ } else {
+ chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip, FL_WRITING);
+ }
+
+#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
+ /* Send command to read back the data */
+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
+
+ if (chip->verify_buf(mtd, buf, mtd->writesize))
+ return -EIO;
+#endif
+ return 0;
}
#define NOTALIGNED(x) (x & (mtd->writesize-1)) != 0
static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const uint8_t *buf)
{
- int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr;
- int autoplace = 0, numpages, totalpages;
+ int chipnr, realpage, page, blockmask;
struct nand_chip *chip = mtd->priv;
- uint8_t *oobbuf, *bufstart, *eccbuf = NULL;
- int ppblock = (1 << (chip->phys_erase_shift - chip->page_shift));
- struct nand_oobinfo *oobsel = &mtd->oobinfo;
-
- DEBUG(MTD_DEBUG_LEVEL3, "nand_write: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len);
+ uint32_t writelen = len;
+ int bytes = mtd->writesize;
+ int ret = -EIO;
- /* 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: Attempt to write past end of page\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_write: "
+ "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: Attempt to write not page aligned data\n");
+ printk(KERN_NOTICE "nand_write: "
+ "Attempt to write not page aligned data\n");
return -EINVAL;
}
- /* Grab the lock and see if the device is available */
- nand_get_device(chip, mtd, FL_WRITING);
+ if (!len)
+ return 0;
- /* Calculate chipnr */
- chipnr = (int)(to >> chip->chip_shift);
- /* Select the NAND device */
- chip->select_chip(mtd, chipnr);
+ nand_get_device(chip, mtd, FL_WRITING);
/* Check, if it is write protected */
if (nand_check_wp(mtd))
goto out;
- /* Autoplace of oob data ? Use the default placement scheme */
- if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) {
- oobsel = chip->autooob;
- autoplace = 1;
- }
- if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR)
- autoplace = 1;
+ chipnr = (int)(to >> chip->chip_shift);
+ chip->select_chip(mtd, chipnr);
- /* Setup variables and oob buffer */
- totalpages = len >> chip->page_shift;
- page = (int)(to >> chip->page_shift);
- /* Invalidate the page cache, if we write to the cached page */
- if (page <= chip->pagebuf && chip->pagebuf < (page + totalpages))
+ realpage = (int)(to >> chip->page_shift);
+ page = realpage & chip->pagemask;
+ blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
+
+ /* Invalidate the page cache, when we write to the cached page */
+ if (to <= (chip->pagebuf << chip->page_shift) &&
+ (chip->pagebuf << chip->page_shift) < (to + len))
chip->pagebuf = -1;
- /* Set it relative to chip */
- page &= chip->pagemask;
- startpage = page;
- /* Calc number of pages we can write in one go */
- numpages = min(ppblock - (startpage & (ppblock - 1)), totalpages);
- oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages);
- bufstart = (uint8_t *) buf;
-
- /* Loop until all data is written */
- while (written < len) {
-
- chip->data_poi = (uint8_t *) &buf[written];
- /* Write one page. If this is the last page to write
- * or the last page in this block, then use the
- * real pageprogram command, else select cached programming
- * if supported by the chip.
- */
- ret = nand_write_page(mtd, chip, page, &oobbuf[oob], oobsel, (--numpages > 0));
- if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write: write_page failed %d\n", ret);
- goto out;
- }
- /* Next oob page */
- oob += mtd->oobsize;
- /* Update written bytes count */
- written += mtd->writesize;
- if (written == len)
- goto cmp;
+ chip->oob_poi = chip->buffers.oobwbuf;
- /* Increment page address */
- page++;
+ while(1) {
+ int cached = writelen > bytes && page != blockmask;
- /* Have we hit a block boundary ? Then we have to verify and
- * if verify is ok, we have to setup the oob buffer for
- * the next pages.
- */
- if (!(page & (ppblock - 1))) {
- int ofs;
- chip->data_poi = bufstart;
- ret = nand_verify_pages(mtd, chip, startpage, page - startpage,
- oobbuf, oobsel, chipnr, (eccbuf != NULL));
- if (ret) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write: verify_pages failed %d\n", ret);
- goto out;
- }
- *retlen = written;
-
- ofs = autoplace ? mtd->oobavail : mtd->oobsize;
- if (eccbuf)
- eccbuf += (page - startpage) * ofs;
- totalpages -= page - startpage;
- numpages = min(totalpages, ppblock);
- page &= chip->pagemask;
- startpage = page;
- oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages);
- oob = 0;
- /* Check, if we cross a chip boundary */
- if (!page) {
- chipnr++;
- chip->select_chip(mtd, -1);
- chip->select_chip(mtd, chipnr);
- }
+ ret = nand_write_page(mtd, chip, buf, page, cached);
+ if (ret)
+ break;
+
+ writelen -= bytes;
+ if (!writelen)
+ break;
+
+ buf += bytes;
+ realpage++;
+
+ page = realpage & chip->pagemask;
+ /* Check, if we cross a chip boundary */
+ if (!page) {
+ chipnr++;
+ chip->select_chip(mtd, -1);
+ chip->select_chip(mtd, chipnr);
}
}
- /* Verify the remaining pages */
- cmp:
- chip->data_poi = bufstart;
- ret = nand_verify_pages(mtd, chip, startpage, totalpages, oobbuf, oobsel, chipnr, (eccbuf != NULL));
- if (!ret)
- *retlen = written;
- else
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write: verify_pages failed %d\n", ret);
-
out:
- /* Deselect and wake up anyone waiting on the device */
+ *retlen = len - writelen;
nand_release_device(mtd);
-
return ret;
}
+/**
+ * nand_write_raw - [GENERIC] Write raw data including oob
+ * @mtd: MTD device structure
+ * @buf: source buffer
+ * @to: offset to write to
+ * @len: number of bytes to write
+ * @buf: source buffer
+ * @oob: oob buffer
+ *
+ * Write raw data including oob
+ */
+int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
+ const uint8_t *buf, uint8_t *oob)
+{
+ struct nand_chip *chip = mtd->priv;
+ int page = (int)(to >> chip->page_shift);
+ int chipnr = (int)(to >> chip->chip_shift);
+ int ret;
+
+ *retlen = 0;
+
+ /* Do not allow writes past end of device */
+ if ((to + len) > mtd->size) {
+ DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt write "
+ "beyond end of device\n");
+ return -EINVAL;
+ }
+
+ /* Grab the lock and see if the device is available */
+ nand_get_device(chip, mtd, FL_WRITING);
+
+ chip->select_chip(mtd, chipnr);
+ chip->oob_poi = oob;
+
+ while (len != *retlen) {
+ ret = nand_write_page(mtd, chip, buf, page, 0);
+ if (ret)
+ return ret;
+ page++;
+ *retlen += mtd->writesize;
+ buf += mtd->writesize;
+ chip->oob_poi += mtd->oobsize;
+ }
+
+ /* Deselect and wake up anyone waiting on the device */
+ nand_release_device(mtd);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nand_write_raw);
/**
* nand_write_oob - [MTD Interface] NAND write out-of-band
"in suspended state\n");
}
-/*
- * Free allocated data structures
- */
-static void nand_free_kmem(struct nand_chip *chip)
-{
- /* Buffer allocated by nand_scan ? */
- if (chip->options & NAND_OOBBUF_ALLOC)
- kfree(chip->oob_buf);
- /* Buffer allocated by nand_scan ? */
- if (chip->options & NAND_DATABUF_ALLOC)
- kfree(chip->data_buf);
- /* Controller allocated by nand_scan ? */
- if (chip->options & NAND_CONTROLLER_ALLOC)
- kfree(chip->controller);
-}
-
-/*
- * Allocate buffers and data structures
- */
-static int nand_allocate_kmem(struct mtd_info *mtd, struct nand_chip *chip)
-{
- size_t len;
-
- if (!chip->oob_buf) {
- len = mtd->oobsize <<
- (chip->phys_erase_shift - chip->page_shift);
- chip->oob_buf = kmalloc(len, GFP_KERNEL);
- if (!chip->oob_buf)
- goto outerr;
- chip->options |= NAND_OOBBUF_ALLOC;
- }
-
- if (!chip->data_buf) {
- len = mtd->writesize + mtd->oobsize;
- chip->data_buf = kmalloc(len, GFP_KERNEL);
- if (!chip->data_buf)
- goto outerr;
- chip->options |= NAND_DATABUF_ALLOC;
- }
-
- if (!chip->controller) {
- chip->controller = kzalloc(sizeof(struct nand_hw_control),
- GFP_KERNEL);
- if (!chip->controller)
- goto outerr;
-
- spin_lock_init(&chip->controller->lock);
- init_waitqueue_head(&chip->controller->wq);
- chip->options |= NAND_CONTROLLER_ALLOC;
- }
- return 0;
-
- outerr:
- printk(KERN_ERR "nand_scan(): Cannot allocate buffers\n");
- nand_free_kmem(chip);
- return -ENOMEM;
-}
-
/*
* Set default functions
*/
chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf;
if (!chip->scan_bbt)
chip->scan_bbt = nand_default_bbt;
+
+ if (!chip->controller) {
+ chip->controller = &chip->hwcontrol;
+ spin_lock_init(&chip->controller->lock);
+ init_waitqueue_head(&chip->controller->wq);
+ }
+
}
/*
* This fills out all the uninitialized function pointers
* with the defaults.
* The flash ID is read and the mtd/chip structures are
- * filled with the appropriate values. Buffers are allocated if
- * they are not provided by the board driver
+ * filled with the appropriate values.
* The mtd->owner field must be set to the module of the caller
*
*/
chip->numchips = i;
mtd->size = i * chip->chipsize;
- /* Allocate buffers and data structures */
- if (nand_allocate_kmem(mtd, chip))
- return -ENOMEM;
-
- /* Preset the internal oob buffer */
- memset(chip->oob_buf, 0xff,
- mtd->oobsize << (chip->phys_erase_shift - chip->page_shift));
+ /* Preset the internal oob write buffer */
+ memset(chip->buffers.oobwbuf, 0xff, mtd->oobsize);
/*
* If no default placement scheme is given, select an appropriate one
/* Use standard hwecc read page function ? */
if (!chip->ecc.read_page)
chip->ecc.read_page = nand_read_page_hwecc;
+ if (!chip->ecc.write_page)
+ chip->ecc.write_page = nand_write_page_hwecc;
case NAND_ECC_HW_SYNDROME:
if (!chip->ecc.calculate || !chip->ecc.correct ||
"Hardware ECC not possible\n");
BUG();
}
- /* Use standard syndrome read page function ? */
+ /* Use standard syndrome read/write page function ? */
if (!chip->ecc.read_page)
chip->ecc.read_page = nand_read_page_syndrome;
+ if (!chip->ecc.write_page)
+ chip->ecc.write_page = nand_write_page_syndrome;
if (mtd->writesize >= chip->ecc.size)
break;
chip->ecc.calculate = nand_calculate_ecc;
chip->ecc.correct = nand_correct_data;
chip->ecc.read_page = nand_read_page_swecc;
+ chip->ecc.write_page = nand_write_page_swecc;
chip->ecc.size = 256;
chip->ecc.bytes = 3;
break;
printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. "
"This is not recommended !!\n");
chip->ecc.read_page = nand_read_page_swecc;
+ chip->ecc.write_page = nand_write_page_swecc;
chip->ecc.size = mtd->writesize;
chip->ecc.bytes = 0;
break;
/* Free bad block table memory */
kfree(chip->bbt);
- /* Free buffers */
- nand_free_kmem(chip);
}
EXPORT_SYMBOL_GPL(nand_scan);
projects / linux-2.6 / commitdiff