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| author | Thomas Gleixner <tglx@linutronix.de> | 2005-02-22 21:48:25 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@mtd.linutronix.de> | 2005-05-23 12:42:18 +0200 |
| commit | dfd61294403cce7ca2263674f420c3417093cb56 (patch) | |
| tree | b96b4aa8524df5104c10ab480eeb9355ff9c2dbf /drivers/mtd/nand | |
| parent | fdf2fd52746bbffeffa19e24cb0608abc5429bc2 (diff) | |
| download | kernel_samsung_smdk4412-dfd61294403cce7ca2263674f420c3417093cb56.zip kernel_samsung_smdk4412-dfd61294403cce7ca2263674f420c3417093cb56.tar.gz kernel_samsung_smdk4412-dfd61294403cce7ca2263674f420c3417093cb56.tar.bz2 | |
[MTD] DiskOnChip: Wait for the command to finish.
Do not use the ready function here, as it might hang for ever.
The result will show, whether the chip is there or not
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/diskonchip.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c index d592767..a9b1da4 100644 --- a/drivers/mtd/nand/diskonchip.c +++ b/drivers/mtd/nand/diskonchip.c @@ -16,7 +16,7 @@ * * Interface to generic NAND code for M-Systems DiskOnChip devices * - * $Id: diskonchip.c,v 1.48 2005/01/31 22:22:21 gleixner Exp $ + * $Id: diskonchip.c,v 1.49 2005/02/22 21:48:21 gleixner Exp $ */ #include <linux/kernel.h> @@ -410,7 +410,12 @@ static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) doc200x_hwcontrol(mtd, NAND_CTL_SETALE); this->write_byte(mtd, 0); doc200x_hwcontrol(mtd, NAND_CTL_CLRALE); - + + /* We cant' use dev_ready here, but at least we wait for the + * command to complete + */ + udelay(50); + ret = this->read_byte(mtd) << 8; ret |= this->read_byte(mtd); @@ -429,6 +434,8 @@ static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) doc2000_write_byte(mtd, 0); doc200x_hwcontrol(mtd, NAND_CTL_CLRALE); + udelay(50); + ident.dword = readl(docptr + DoC_2k_CDSN_IO); if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); |