Want to write PCI serial driver

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Hi,
I'm beginner in Linux device driver.I want to write driver for PCI card which is related to serial(8250) driver.
- I want to learn to write code from begining.
- For that i need sample driver code like char driver.
Please provide sample PCI-serial driver code and inform me what should i read?
Thanks.

Posted 22-Dec-14 3:18am

Ronny3

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Mehdi Gholam · Answer 1 · 2014-12-22T03:28:00

Solution 1

Google is your friend : http://lxr.free-electrons.com/source/drivers/tty/serial/8250/8250_pci.c[^]

Posted 22-Dec-14 3:28am

Mehdi Gholam

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Ronny3 23-Dec-14 3:00am

Yes.I'm using same code for understanding.
- 1)I want to know that How PCI driver knows it has to correlate with Serial driver?Only using function calls?
- 2)In this file "serial8250_register_port".So it involves serial driver(8250.c) to open ports.Is it correct?
- 3) If i know Vendor and device ID then may I use "pci_find_device"to
find matched device?
Thanks for help.