int spare_len;
};
-/* Define delays in microsec for NAND device operations */
-#define TROP_US_DELAY 2000
-
/* OOB placement block for use with hardware ecc generation */
static struct nand_ecclayout nandv1_hw_eccoob_smallpage = {
.eccbytes = 5,
/* This function polls the NANDFC to wait for the basic operation to
* complete by checking the INT bit of config2 register.
*/
-static void wait_op_done(struct mxc_nand_host *host, int max_retries,
- int useirq)
+static void wait_op_done(struct mxc_nand_host *host, int useirq)
{
uint32_t tmp;
+ int max_retries = 2000;
if (useirq) {
if ((readw(host->regs + NFC_CONFIG2) & NFC_INT) == 0) {
writew(NFC_CMD, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, useirq);
+ wait_op_done(host, useirq);
}
/* This function sends an address (or partial address) to the
writew(NFC_ADDR, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, islast);
+ wait_op_done(host, islast);
}
static void send_page(struct mtd_info *mtd, unsigned int ops)
writew(ops, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, true);
+ wait_op_done(host, true);
}
}
static void send_read_id(struct mxc_nand_host *host)
{
struct nand_chip *this = &host->nand;
- uint16_t tmp;
/* NANDFC buffer 0 is used for device ID output */
writew(0x0, host->regs + NFC_BUF_ADDR);
- /* Read ID into main buffer */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_SP_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
-
writew(NFC_ID, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, true);
+ wait_op_done(host, true);
if (this->options & NAND_BUSWIDTH_16) {
void __iomem *main_buf = host->main_area0;
{
void __iomem *main_buf = host->main_area1;
uint32_t store;
- uint16_t ret, tmp;
+ uint16_t ret;
/* Issue status request to NAND device */
/* store the main area1 first word, later do recovery */
* corruption of read/write buffer on status requests. */
writew(1, host->regs + NFC_BUF_ADDR);
- /* Read status into main buffer */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_SP_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
-
writew(NFC_STATUS, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, true);
+ wait_op_done(host, true);
/* Status is placed in first word of main buffer */
/* get status, then recovery area 1 data */
}
}
+/*
+ * The generic flash bbt decriptors overlap with our ecc
+ * hardware, so define some i.MX specific ones.
+ */
+static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' };
+static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 0,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = bbt_pattern,
+};
+
+static struct nand_bbt_descr bbt_mirror_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 0,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = mirror_pattern,
+};
+
static int __init mxcnd_probe(struct platform_device *pdev)
{
struct nand_chip *this;
mtd->priv = this;
mtd->owner = THIS_MODULE;
mtd->dev.parent = &pdev->dev;
- mtd->name = "mxc_nand";
+ mtd->name = DRIVER_NAME;
/* 50 us command delay time */
this->chip_delay = 5;
} else
BUG();
+ /* disable interrupt and spare enable */
tmp = readw(host->regs + NFC_CONFIG1);
tmp |= NFC_INT_MSK;
+ tmp &= ~NFC_SP_EN;
writew(tmp, host->regs + NFC_CONFIG1);
init_waitqueue_head(&host->irq_waitq);
host->irq = platform_get_irq(pdev, 0);
- err = request_irq(host->irq, mxc_nfc_irq, 0, "mxc_nd", host);
+ err = request_irq(host->irq, mxc_nfc_irq, 0, DRIVER_NAME, host);
if (err)
goto eirq;
if (pdata->width == 2)
this->options |= NAND_BUSWIDTH_16;
+ if (pdata->flash_bbt) {
+ this->bbt_td = &bbt_main_descr;
+ this->bbt_md = &bbt_mirror_descr;
+ /* update flash based bbt */
+ this->options |= NAND_USE_FLASH_BBT;
+ }
+
/* first scan to find the device and get the page size */
if (nand_scan_ident(mtd, 1)) {
err = -ENXIO;
return err;
}
-static int __exit mxcnd_remove(struct platform_device *pdev)
+static int __devexit mxcnd_remove(struct platform_device *pdev)
{
struct mxc_nand_host *host = platform_get_drvdata(pdev);
.driver = {
.name = DRIVER_NAME,
},
- .remove = __exit_p(mxcnd_remove),
+ .remove = __devexit_p(mxcnd_remove),
.suspend = mxcnd_suspend,
.resume = mxcnd_resume,
};