-----Original Message----- From: kernelnewbies-bounces@kernelnewbies.org [mailto:kernelnewbies-bounces@kernelnewbies.org] On Behalf Of Valdis.Kletnieks@vt.edu Sent: Monday, March 09, 2015 8:14 AM To: Ronit Halder Cc: kernelnewbies@kernelnewbies.org Subject: Re: getting interrupt number On Mon, 09 Mar 2015 07:55:10 +0530, Ronit Halder said:
How to get the interrupt number of a device.I know it's device id and the bus number. The device is a usb mouse.
In that case, you won't find an interrupt number for the mouse, you'll find one for the USB controller the mouse is attached to. Make note that the same USB controller will catch interrupts for *all* devices on that USB bus.
Since USB devices uses PCI window, you can find the interrupt number of the USB controller, by reading the IRQ Line (PCI_INTERRUPT_LINE) form the PCI config. Space, using pci_read_config_byte(). - Saumendra ::DISCLAIMER:: ---------------------------------------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. ----------------------------------------------------------------------------------------------------------------------------------------------------