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mtd: MXC NAND support for 2KiB page size flashes 

- Add support for 2KiB page size flashes
- Fix page address access for large pages
- Detect oob layout at runtime
- handle pagesize_2k variable
- Fix oob16 layout: reserve location 5 of oob area since it's used for bbt

Signed-off-by: Vladimir Barinov <vova.barinov@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Vladimir Barinov 2009-05-25 13:06:17 +04:00 committed by David Woodhouse
parent f36e20c01a
commit bd3fd62ecc
1 changed files with 51 additions and 9 deletions
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60
drivers/mtd/nand/mxc_nand.c
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@ -138,7 +138,14 @@ static struct nand_ecclayout nand_hw_eccoob_8 = {
static struct nand_ecclayout nand_hw_eccoob_16 = {
.eccbytes = 5,
.eccpos = {6, 7, 8, 9, 10},
.oobfree = {{0, 6}, {12, 4}, }
.oobfree = {{0, 5}, {11, 5}, }
};
static struct nand_ecclayout nand_hw_eccoob_64 = {
.eccbytes = 20,
.eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
.oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
};
#ifdef CONFIG_MTD_PARTITIONS
@ -795,9 +802,13 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
send_addr(host, (page_addr & 0xff), false);
if (host->pagesize_2k) {
send_addr(host, (page_addr >> 8) & 0xFF, false);
if (mtd->size >= 0x40000000)
if (mtd->size >= 0x10000000) {
/* paddr_8 - paddr_15 */
send_addr(host, (page_addr >> 8) & 0xff, false);
send_addr(host, (page_addr >> 16) & 0xff, true);
} else
/* paddr_8 - paddr_15 */
send_addr(host, (page_addr >> 8) & 0xff, true);
} else {
/* One more address cycle for higher density devices */
if (mtd->size >= 0x4000000) {
@ -919,7 +930,6 @@ static int __init mxcnd_probe(struct platform_device *pdev)
this->ecc.mode = NAND_ECC_HW;
this->ecc.size = 512;
this->ecc.bytes = 3;
this->ecc.layout = &nand_hw_eccoob_8;
tmp = readw(host->regs + NFC_CONFIG1);
tmp |= NFC_ECC_EN;
writew(tmp, host->regs + NFC_CONFIG1);
@ -953,12 +963,44 @@ static int __init mxcnd_probe(struct platform_device *pdev)
this->ecc.layout = &nand_hw_eccoob_16;
}
host->pagesize_2k = 0;
/* first scan to find the device and get the page size */
if (nand_scan_ident(mtd, 1)) {
err = -ENXIO;
goto escan;
}
/* Scan to find existence of the device */
if (nand_scan(mtd, 1)) {
DEBUG(MTD_DEBUG_LEVEL0,
"MXC_ND: Unable to find any NAND device.\n");
host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0;
if (this->ecc.mode == NAND_ECC_HW) {
switch (mtd->oobsize) {
case 8:
this->ecc.layout = &nand_hw_eccoob_8;
break;
case 16:
this->ecc.layout = &nand_hw_eccoob_16;
break;
case 64:
this->ecc.layout = &nand_hw_eccoob_64;
break;
default:
/* page size not handled by HW ECC */
/* switching back to soft ECC */
this->ecc.size = 512;
this->ecc.bytes = 3;
this->ecc.layout = &nand_hw_eccoob_8;
this->ecc.mode = NAND_ECC_SOFT;
this->ecc.calculate = NULL;
this->ecc.correct = NULL;
this->ecc.hwctl = NULL;
tmp = readw(host->regs + NFC_CONFIG1);
tmp &= ~NFC_ECC_EN;
writew(tmp, host->regs + NFC_CONFIG1);
break;
}
}
/* second phase scan */
if (nand_scan_tail(mtd)) {
err = -ENXIO;
goto escan;
}