Hi , > thanx for the reply.....I want to use >ioremap returned pointer as global....in the driver......how can i do it.... You need to define a pointer for the base address returned by ioremap() in your golbal device structure. You can refer some other PCI device driver in the kernel tree for this. >>> I am writing device drivers for PCI card.....I want write >>>my own Read and Write function calls in Driver module...... >>>I am using "ioremap" function which return a pointer....i want to use >>>this pointer in my own read and write functionalities....kindly reply >>>to this as soon as possible..... >>> >>>If it's a PCI controler for some board then you need to find the address range of config and IO/Memory space region of the device. From the board data sheat you can easily make out the different address and the length of each regions. >>> Then you can fing the base address of your device for each region(config, IO/Mem) using ioremap(). You can use this base address to access the registers in different regions. >>> >>> If it's a PCI based card such as serial/eth, then you need to probe for your device based on the devid and venid using >>>pci_find_device()/ pci_find_slot() based on your requirement. Then find the base address of your device using ioremap() >>>(the address where your device is mapped can be found fron the data sheet). Now you can access the registers for your device. Thanks, Saumendra -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
