Am Donnerstag, 22. Mai 2003 10:09 schrieben Sie: > Today, Franz Reinhardt wrote: > > 1. Rubini mentioned it in his book. > > 2. the saa7134 driver and IIRC bttv does it that way > > Yes, correct. > > > /* get mmio */ > > It is for MMIO only. You still use [in|out][b|w|l] for IO ports > proper. > > AC seemed to suggest that it is not even necessary to call > *_request_region*() which seems to be correct. I do it anyway, as > /proc/ioports then shows my module as having claimed that part of IO > space. Just to go for sure: AC's example: Take the io ports from pci address space and write to the physical adresses, using inb,outb ... saa7134 driver: Take the io ports from pci address space, request and remap them and write to the virtual adresses, using writel, readl .. After that I suggest, you can always write to io ports (at least on x86 arch) without mapping to memory nor requesting *region*(). Franz
