Eric Clément (clement.eric@xxxxxxxxx) wrote: > I create a pci device which I want to interact with Linux for a user > application. This pci device is a FPGA. I create a kernel module for > communication kernel - user space and now I want to send settings > information to this pci device. > > I need to use (I/O memory) to do that. But I don't how. I can't get > the base address with pci_read_config and after that I am confuse. I > think I can use both function outb or writeb to send information but I > don't know which is better. > > outb seem to be Intel specific and writeb need to map I/0 memory with ioremap outb is used to communicated through IO ports. My answer was really so quick. If you really have to use I/O Memory, it is ioread8, ioread16,... and iowrite8, ... But I think you must read : http://lwn.net/images/pdf/LDD3/ch12.pdf Perhaps: int pci_write_config_word(struct pci_dev* dev, int where, ui16 val); is what you search. Sorry, > > Which method is more standard for a pci device (portable)? > > On 6/22/05, Christophe Lucas <clucas@xxxxxxxxxxxxx> wrote: > > Eric Clément (clement.eric@xxxxxxxxx) wrote: > > > Hi, > > > > > > I know the base address (I/O memory) of my device, but I don't know > > > how to write information to the device. > > > > > > Which fonction shoud I use : > > > > > > outb, writeb or ... ? > > > > I think you should use outb(); > > You can see how is declared writeb() for x86 : > > > > http://lxr.linux.no/source/include/asm-i386/io.h#L165 > > > > But I think you should give more information to us to be able to help > > you. > > > > - Christophe > > - Christophe -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
