Satya Ranjan Jena

Member of Platform development team for Commscope's Next Gen Radio Point(NGRP) devices.

• Key developer of AXI-FIFO FPGA driver for IEEE 1588 PTP(Precision Time Protocol) MAC and Marvell PHY(88X3310) Timestamping for Radio Access Products.
• Developer of PTP Timing 8275.2(Unicast) and 8275.1(802.1 Raw Ethernet) Timing Profiles on FIFO FPGA and backported to support other devices.
• Developed proprietary Packet Filter and PTP Extraction Module Drivers for 10/25g and USXGMII ethernet.
• Implemeted Commscope's proprietary INBAND Signalling feature for Transparent Clock (TC) support in Linux v5.10.

• Worked as member for Montavista Software Engineering group for Montavista Linux and CGX Products.

Project 1: Contributed in development and porting activities for YOCTO Based CGX 2.4 MSDs supporting Xilinx ZC702 based Processor.

• Developed proprietary application for setting display Frame Buffer resolutions.
• Resolved critical kernel bugs and submitted patches to xilinx repos.

Project 2: Involved in YOCTO2.4 Based CGX 2.4 MSD Development for

NUP1002 devices(dual CPUs).

• Ported the reference device tree and made fully compatible for initialization of dual CPUs(ARM + PPC).
• Developed script added to Yocto BSP layer for generating compatible fitImage for booting with individual CPUs.
• Fixed multiple Ethernet related critical bugs.
• Fixed buggy device tree issues for other peripherals as per hardware schematic.

Project 3: Complete ownership on development and porting of UBoot 2020.01 and Montavista Linux for Arm OMAP4470 SOC.

• Developed compatible MLO image setting proper pinmux configurations and other minor changes.
• Resolved eMMC driver initialization issue in Uboot. Patch submitted to TI Repo.
• Ported Montavista Linux v5.4 with compatible device tree support and fixed power management and thermal related issues in initial phase.
• Fixed USB, Thermal, Ethernet,WIFI,BT etc. module as per schematic.

• Worked in kernel development team for secure mobile environment.

Project 1: Initramfs optimization for boot performance and kernel security features i.e understanding the dm-verity concept for providing a secure and verified boot path for OPPO mobile devices.

• Worked in core development team for (NXP PowerPC 8323E and 8309E Communication processors) router based products.

Project 1 : Involves Bare-Board bring Up of Freescale’s PowerPC Processors MPC8323E and MPC8309E and Loading the Bootloader with code warrior USB TAP to flash device.

• This requires Understanding & analysis the Boot sequence for PowerPC architectures.
• Updating the RCWs as per processor and configuring the Local Bus window Registers and memory controller Base registers from bootloaders to gain minimal functionalities.
• U-boot porting from v2010.06 to v2013 for MPC8309 based router products.

Project 2: Handling Quectel High Speed USB modem
EC25, UC20 for Network Data Transmission using SIM and handling AT
Commands set for Quectel cellular engine.

• Involvement in developing the Misc Driver Module for Managing USB Module Power sequence.
• Developed building CLI based applications for Applying AT commands over AT USB interface for Updating Modules Data settings and Module Status, Network Status.

Project 3: Development of Ethernet switch ( Marvell 88E6065 ) Phy detection and Ethtool handlers.

• The switch is interfaced to MPC8309E via MII for performing LAN & WAN Ethernet functionality with switch special features.
• The device 88E6065 switch is configured as phy chip where as MPC8309E is having UCC which will be configured as MAC.

Project 4: LED Driver development placed over Local Bus and Parallel I/O ports for secure access router.

• This requires mapping the external LED’s to Local Bus Address Space which are connected through local Bus signals and parallel i/o ports for multiple functionalities.
• Added the same support in U-boot for early device detections as per requirements.