diff options
Diffstat (limited to 'drivers/mtd/nand/mxc_nand.c')
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 5130a853102..ea491140e55 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()) { |