Linux USB Device Driver Developer

Location:

Exp

We are looking for an experienced Linux USB Device Driver Developer to join our embedded software team. The candidate will work on USB driver development and integration, covering device-side gadget frameworks and core Linux USB architecture.

Key Responsibilities:

• Understand the fundamentals of USB, including USB 1.1/2.0/3.x specifications, device descriptors (device, config, interface, endpoint), and transfer types (control, bulk, interrupt, isochronous, streams).
• Handle USB power management, including bus/self-powered modes, suspend/resume, and Link Power Management (LPM).
• Work with the Linux USB architecture encompassing USB core, enumeration, host controller drivers (EHCI, OHCI, XHCI, DWC3), gadget framework, and USB Device Controllers (UDC).
• Develop and maintain USB class drivers such as HID, Mass Storage, CDC, Audio, and Video.
• Develop device-side USB stacks using the Gadget API (usb_gadget, usb_ep), function drivers (g_ether, g_mass_storage, g_hid), and dynamic configurations using ConfigFS.
• Manage USB endpoint handling, descriptors, and control requests.
• Write USB device drivers including device tree handling (snps, dwc3), registering UDC drivers, and implementing callbacks (bind, unbind, setup).
• Handle control requests and USB transfers using usb_ep_queue.
• Collaborate with other teams to debug and optimize USB functionality.

Mandatory Skills:

• Strong proficiency in C programming.
• Good understanding of USB specifications and Linux USB architecture.
• Experience in writing and debugging Linux USB Device Drivers.
• Familiarity with Device Tree and Linux kernel development.
• Knowledge of embedded Linux development tools.

Preferred Skills:

• Experience with USB gadget framework and class drivers.
• Exposure to kernel module programming and driver registration.
• Knowledge of advanced power management features like LPM.
• Experience with ConfigFS for USB device configuration.
• Familiarity with debugging embedded USB hardware and software.

Education:

• Bachelor's/Master's degree in Electronics, Computer Science, or related field.