Need PCI Driver Help!

[pauldemet]

I am rather new to Linux and driver programming. I am in the process of writing a driver for a new PCIe device. Everything seems fine until I attempt to open the device.

I am able to build and install the driver. I am creating a char device and accessing the driver through ioctl calls. The device can be seen in the /dev directory.

ls - l /dev | grep pxm:
crw-rw-r-- 1 root staff 125, 0 2010-11-29 09:01 pxmuio96a

All resources requested have been successfully obtained.

When I execute
dev_handle = open(device_id, O_RDWR) // device_id = "/dev/pxmuio96a"
the return value is -1. I am getting errno = 6 (ENXIO), which is "No such device or address". Don't understand this since I can see the device and am using the same name in the open statement.

The device structure is:

struct file_operations pxmuio96_fops = {
owner: THIS_MODULE,
open: pci_device_open,
release: pci_device_release,
ioctl: pci_device_ioctl,
};

I have been chasing this for days. Any help would be greatly appreciated. Thanks.

[oz]

Hello and welcome!

Sorry, but duplicate threads are not allowed:

http://www.linuxforums.org/forum/lin...ums-rules.html

You'll need to continue any discussion on this topic in your other thread.