I am creating a PCI driver for a custom card and want to write 0xffff to
a location offset from the base by 0x48 and
have the following code:
<snip>
unsigned int io_addr;
unsigned int io_size;
void* base;
pci_enable_device (pdev)
io_addr = pci_resource_start(pdev, 0);
io_size = pci_resource_len(pdev, 0);
if ((pci_resource_flags(pdev, 0) & IORESOURCE_MEM)){
if(check_mem_region(io_addr, io_size))
DBG("Already In Use");//this is never reached
request_mem_region(io_addr, io_size , "Card Driver");
base=ioremap(io_addr, io_size);
if(base==0)
DBG("memory mapped wrong\n");//this is never reached
writew(0xffff, base + 0x48);
<snip>
The card is found, io_addr = 0xe9011000 and io_size = 0x200.
The write is unsuccessful or at least the data never reaches the card.
What am I doing incorrectly?
Thanks and best regards,
David
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Feb 23 2002 - 21:00:28 EST