Messages in this thread | | | Subject | Re: isa memory address | From | Antonino Sergi <> | Date | Tue, 09 Nov 2004 16:42:36 +0100 |
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I looked for iomem with a kernel-2.4.2:
/proc/iomem reports 00000000-0009fbff : System RAM 0009fc00-0009ffff : reserved 000a0000-000bffff : Video RAM area 000c0000-000c7fff : Video ROM 000f0000-000fffff : System ROM 00100000-1fffbfff : System RAM
Nothing in the region 000d0000-000d0006 (used by my driver), so why is it BUSY?
I have not tried yet to use it anyway.
Thanks
Antonino Sergi
On Mon, 2004-11-08 at 17:46, Randy.Dunlap wrote: > Antonino Sergi wrote: > > Hi, > > > > I'm working with an old data acquisition system that uses an 8-bit card > > in an ISA slot (address 0xd0000), by a simple driver I ported from > > kernel 1.1.x to 2.2.24. > > > > It works fine, but I'd like to have features by newer kernels (2.4 or > > even 2.6), like new filesystems support. > > > > On kernels >=2.4.0 check_region returns -EBUSY for that address, > > but it is not actually used; I tried to understand if something has been > > changed/removed, because of obsolescence of devices, in IO management, > > but I couldn't. > > > > Does anybody have any explanation/suggestion? > > Please post contents of /proc/iomem . > I'm guessing that it will show something like: > 000e0000-000effff : Extension ROM > (but for address 000d0000). > So then the question becomes how to assign/allocate it for your > driver. > > You might have to dummy up a call to release_resource() first, > then use request_resource() to acquire it. > Or just use the addresses anyway.... even though check_region() says > -EBUSY. BTW, check_region() is deprecated in 2.6.x, so if your > driver could just use request_region() and release_region(), that > would be better. > > > Thank you > > > > Best Regards, > > > > Antonino Sergi > > > > PS:As I'm not subscribed, please CC me your answers. >
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