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mxc_nand: factor out a check_int function 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
hifive-unleashed-5.1
Sascha Hauer 2010-08-06 15:53:07 +02:00 committed by David Woodhouse
parent 5f97304ef1
commit 7aaf28ac02
1 changed files with 19 additions and 13 deletions
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32
drivers/mtd/nand/mxc_nand.c
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@ -122,6 +122,7 @@ struct mxc_nand_host {
void (*send_page)(struct mtd_info *, unsigned int);
void (*send_read_id)(struct mxc_nand_host *);
uint16_t (*get_dev_status)(struct mxc_nand_host *);
int (*check_int)(struct mxc_nand_host *);
};
/* OOB placement block for use with hardware ecc generation */
@ -181,34 +182,38 @@ static irqreturn_t mxc_nfc_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}
static int check_int_v1_v2(struct mxc_nand_host *host)
{
uint32_t tmp;
tmp = readw(host->regs + NFC_CONFIG2);
if (!(tmp & NFC_INT))
return 0;
writew(tmp & ~NFC_INT, NFC_CONFIG2);
return 1;
}
/* 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 useirq)
{
uint16_t tmp;
int max_retries = 8000;
if (useirq) {
if ((readw(host->regs + NFC_CONFIG2) & NFC_INT) == 0) {
if (!host->check_int(host)) {
enable_irq(host->irq);
wait_event(host->irq_waitq,
readw(host->regs + NFC_CONFIG2) & NFC_INT);
tmp = readw(host->regs + NFC_CONFIG2);
tmp &= ~NFC_INT;
writew(tmp, host->regs + NFC_CONFIG2);
wait_event(host->irq_waitq, host->check_int(host));
}
} else {
while (max_retries-- > 0) {
if (readw(host->regs + NFC_CONFIG2) & NFC_INT) {
tmp = readw(host->regs + NFC_CONFIG2);
tmp &= ~NFC_INT;
writew(tmp, host->regs + NFC_CONFIG2);
if (host->check_int(host))
break;
}
udelay(1);
}
if (max_retries < 0)
@ -774,6 +779,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
host->send_page = send_page_v1_v2;
host->send_read_id = send_read_id_v1_v2;
host->get_dev_status = get_dev_status_v1_v2;
host->check_int = check_int_v1_v2;
}
if (nfc_is_v21()) {