I am trying to implement USB drivers in Linux. Before that, I want to know whether USB drivers are character drivers or block drivers? or is it a separate category?
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1Your question is poorly phrased and/or reflects weak understanding of USB. USB is a bus. By *"USB drivers"* are you referring to the (platform) drivers for USB host or gadget controllers? Or are you referring drivers for the devices that can be attached to a host through USB, e.g. a USB flash drive (a block device) or serial port adapter (a char device) or a WiFi adapter (a network device)? – sawdust Jul 28 '15 at 20:06
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Well, this might help: http://free-electrons.com/doc/linux-usb.pdf – David Grayson Jul 29 '15 at 01:13
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There are both character and block USB drivers:
cdc-acmis a character driver (for USB CDC serial ports).usb-storageis a block device driver (USB mass storage).
You could omit developing a kernel level USB driver by using LibUSB in your application.
Turbo J
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The answer is misleading and/or incomplete. What about a network adapter? – sawdust Aug 01 '15 at 01:38