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path: root/drivers/mtd/nand/mxc_nand.c
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Diffstat (limited to 'drivers/mtd/nand/mxc_nand.c')
-rw-r--r--drivers/mtd/nand/mxc_nand.c109
1 files changed, 77 insertions, 32 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index f3548d048014..76beea40d2cf 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
@@ -192,7 +199,7 @@ static void wait_op_done(struct mxc_nand_host *host, int max_retries,
}
udelay(1);
}
- if (max_retries <= 0)
+ if (max_retries < 0)
DEBUG(MTD_DEBUG_LEVEL0, "%s(%d): INT not set\n",
__func__, param);
}
@@ -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) {
@@ -831,6 +842,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
break;
case NAND_CMD_READID:
+ host->col_addr = 0;
send_read_id(host);
break;
@@ -867,6 +879,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
mtd->priv = this;
mtd->owner = THIS_MODULE;
mtd->dev.parent = &pdev->dev;
+ mtd->name = "mxc_nand";
/* 50 us command delay time */
this->chip_delay = 5;
@@ -882,8 +895,10 @@ static int __init mxcnd_probe(struct platform_device *pdev)
this->verify_buf = mxc_nand_verify_buf;
host->clk = clk_get(&pdev->dev, "nfc");
- if (IS_ERR(host->clk))
+ if (IS_ERR(host->clk)) {
+ err = PTR_ERR(host->clk);
goto eclk;
+ }
clk_enable(host->clk);
host->clk_act = 1;
@@ -896,7 +911,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
host->regs = ioremap(res->start, res->end - res->start + 1);
if (!host->regs) {
- err = -EIO;
+ err = -ENOMEM;
goto eres;
}
@@ -919,7 +934,6 @@ 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 +967,44 @@ 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;
+ }
+
+ host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0;
- /* 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");
+ 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;
}
@@ -981,7 +1027,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
return 0;
escan:
- free_irq(host->irq, NULL);
+ free_irq(host->irq, host);
eirq:
iounmap(host->regs);
eres:
@@ -1001,7 +1047,7 @@ static int __devexit mxcnd_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
nand_release(&host->mtd);
- free_irq(host->irq, NULL);
+ free_irq(host->irq, host);
iounmap(host->regs);
kfree(host);
@@ -1011,30 +1057,35 @@ static int __devexit mxcnd_remove(struct platform_device *pdev)
#ifdef CONFIG_PM
static int mxcnd_suspend(struct platform_device *pdev, pm_message_t state)
{
- struct mtd_info *info = platform_get_drvdata(pdev);
+ struct mtd_info *mtd = platform_get_drvdata(pdev);
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
int ret = 0;
DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : NAND suspend\n");
- if (info)
- ret = info->suspend(info);
-
- /* Disable the NFC clock */
- clk_disable(nfc_clk); /* FIXME */
+ if (mtd) {
+ ret = mtd->suspend(mtd);
+ /* Disable the NFC clock */
+ clk_disable(host->clk);
+ }
return ret;
}
static int mxcnd_resume(struct platform_device *pdev)
{
- struct mtd_info *info = platform_get_drvdata(pdev);
+ struct mtd_info *mtd = platform_get_drvdata(pdev);
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
int ret = 0;
DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : NAND resume\n");
- /* Enable the NFC clock */
- clk_enable(nfc_clk); /* FIXME */
- if (info)
- info->resume(info);
+ if (mtd) {
+ /* Enable the NFC clock */
+ clk_enable(host->clk);
+ mtd->resume(mtd);
+ }
return ret;
}
@@ -1055,13 +1106,7 @@ static struct platform_driver mxcnd_driver = {
static int __init mxc_nd_init(void)
{
- /* Register the device driver structure. */
- pr_info("MXC MTD nand Driver\n");
- if (platform_driver_probe(&mxcnd_driver, mxcnd_probe) != 0) {
- printk(KERN_ERR "Driver register failed for mxcnd_driver\n");
- return -ENODEV;
- }
- return 0;
+ return platform_driver_probe(&mxcnd_driver, mxcnd_probe);
}
static void __exit mxc_nd_cleanup(void)
generated by cgit v1.2.3 (git 2.51.0) at 2025-09-25 22:41:49 +0000