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authorSascha Hauer <s.hauer@pengutronix.de>2010-08-06 17:53:07 +0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-08-06 19:37:22 +0400
commit7aaf28ac02ff01f4202fc2e8a71ea33775da0f6f (patch)
tree1edf8478c5cc57e86bc93f0945dc68003636d6b4 /drivers/mtd
parent5f97304ef12b79f1a466971eefdf93ea3b2d341f (diff)
downloadlinux-7aaf28ac02ff01f4202fc2e8a71ea33775da0f6f.tar.xz
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>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/mxc_nand.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 5130a8531024..ea491140e552 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -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()) {