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authorVladimir Barinov <vova.barinov@gmail.com>2009-05-25 13:06:17 +0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-06-05 18:15:41 +0100
commitbd3fd62ecc99c709739cb969be76f44903a4043b (patch)
treea0dd30dac98177e35bb097c4cd6b3974b202b139
parentf36e20c01ad0104688f2eaebdf2213e749929c97 (diff)
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>
-rw-r--r--drivers/mtd/nand/mxc_nand.c60
1 files changed, 51 insertions, 9 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index d5aea6951d0..d03bd4eff72 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -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;
}