</para>
<programlisting>
static struct mtd_info *board_mtd;
-static unsigned long baseaddr;
+static void __iomem *baseaddr;
</programlisting>
<para>
Static example
<programlisting>
static struct mtd_info board_mtd;
static struct nand_chip board_chip;
-static unsigned long baseaddr;
+static void __iomem *baseaddr;
</programlisting>
</sect1>
<sect1 id="Partition_defines">
information about the device.
</para>
<programlisting>
-int __init board_init (void)
+static int __init board_init (void)
{
struct nand_chip *this;
int err = 0;
}
/* map physical address */
- baseaddr = (unsigned long)ioremap(CHIP_PHYSICAL_ADDRESS, 1024);
- if(!baseaddr){
+ baseaddr = ioremap(CHIP_PHYSICAL_ADDRESS, 1024);
+ if (!baseaddr) {
printk("Ioremap to access NAND chip failed\n");
err = -EIO;
goto out_mtd;
goto out;
out_ior:
- iounmap((void *)baseaddr);
+ iounmap(baseaddr);
out_mtd:
kfree (board_mtd);
out:
nand_release (board_mtd);
/* unmap physical address */
- iounmap((void *)baseaddr);
+ iounmap(baseaddr);
/* Free the MTD device structure */
kfree (board_mtd);
<sect1 id="Multiple_chip_control">
<title>Multiple chip control</title>
<para>
- The nand driver can control chip arrays. Therefor the
+ The nand driver can control chip arrays. Therefore the
board driver must provide an own select_chip function. This
function must (de)select the requested chip.
The function pointer in the nand_chip structure must
The ECC bytes must be placed immidiately after the data
bytes in order to make the syndrome generator work. This
is contrary to the usual layout used by software ECC. The
- seperation of data and out of band area is not longer
+ separation of data and out of band area is not longer
possible. The nand driver code handles this layout and
the remaining free bytes in the oob area are managed by
the autoplacement code. Provide a matching oob-layout
bad blocks. They have factory marked good blocks. The marker pattern
is erased when the block is erased to be reused. So in case of
powerloss before writing the pattern back to the chip this block
- would be lost and added to the bad blocks. Therefor we scan the
+ would be lost and added to the bad blocks. Therefore we scan the
chip(s) when we detect them the first time for good blocks and
store this information in a bad block table before erasing any
of the blocks.
<para>
The blocks in which the tables are stored are procteted against
accidental access by marking them bad in the memory bad block
- table. The bad block table managment functions are allowed
+ table. The bad block table management functions are allowed
to circumvernt this protection.
</para>
<para>
manufacturers specifications. This applies similar to the spare area.
</para>
<para>
- Therefor NAND aware filesystems must either write in page size chunks
+ Therefore NAND aware filesystems must either write in page size chunks
or hold a writebuffer to collect smaller writes until they sum up to
pagesize. Available NAND aware filesystems: JFFS2, YAFFS.
</para>