ats wrote:
have a wireless network card over PCMCIA....i need to just access
the registers of this card and pass this register details to the user
application.Since i will not connect to the network at this stage i
preferred bypassing the network stack.Hence instead of a network
driver i went ahead writing a character driver.
I inserted the PCI module using insmod..That called PCI
probe....Inside PCI probe i registered by character driver by calling
register_chrdev().And i remapped the card memory by calling the
following sequence of functions.
pci_resource_start
request_mem_region
ioremap
Then i created a device using mknod and called the open function of
the character driver.....Till here everything works fine....
Once the device opened i made a readl call to read the mapped
memory..This fails..It gives me a segmentation fault.....If i call
readl in the probe function it works fine and reads the memory at that
location..However this call fails in open..What can be the reason...
Have i proceeded the right way....Are there any additional things to
be set..Am working on linux 2.6 kernel
Attached below is my prog
I don't see where it is trying to read anything in this code. The way in
which you're doing that is likely the problem..
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from [email protected]
Home Page: http://www.roberthancock.com/
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