Welcome to Linux4SAM

Welcome to the main starting point for Linux OS on SAM products. Its aim is to centralize information about Linux kernel and open source projects on Microchip AT91 Smart ARM-based Microprocessors (aka SAM).

Our goal is to be an interface with open source projects that include AT91 support. We do not want to duplicate information but to link as much as possible to good resources available on the Web.

Keep an eye on this website as it has been designed for instant update. We will try to make it live with the open source community and update AT91 information in those pages. To keep yourself informed, add WebRss or WebAtom feeds in your usual news reader.

Questions, feedback, patches and enhancement are the way open source communities live. Go to LinksToCommunities page for a natural way to interact with material presented on this website.

  Linux4SAM 6.2 demo directory  

• Linux kernel 4.19.x (+ LTS maintenance updates up to v4.19.78)
• AT91Bootstrap 3.9.0 with additional support for SAM9X60 SoC, SAM9X60 DDR2 SiP, SAM9X60 SDR SiP, together with support for SAMA5D2 WLSOM1 EK
• U-Boot 2019.04 with PDA screen detection at boot time, FIT image support and overlay support. Check our FAQ for any questions
• Yocto Project 2.7.1 (Warrior)
• Buildroot generated from 2019.05 revision using buildroot external
• OpenWrt Linux operating system : 18.06.2 stable branch
• Device tree overlays and FIT Image support
• New board support SAM9X60 Evaluation Kit and dedicated page: Sam9x60EKMainPage
• New board support SAMA5D2 Wireless System-On-a-Module LPDDR2 256MB Evaluation Kit and dedicated page: Sama5d27WLSom1EKMainPage
• New full featured graphical demos using the Microchip Ensemble Graphics Toolkit (EGT) 0.8.2 as a graphic library
• Old demos based on QT5 are still available for reference : WildWest, PythonMPIO, Hardware planes, Home Automation, and QT5 packages are still part of the distribution
• Tested various eMMC parts with our SOM1 EK board, here are the results on the dedicated page: eMMC support for SAMA5D27 SOM1 EK board

New kernel features:

• Integration of stable kernel updates up to v4.19.78
• Added support for SAMA5D27 WLSOM1 EK board
• Added support for SAM9X60 EK board

• SAM9X60 SoC drivers:
  • PLL Fractional support, PIT64 driver used for clock event, PIO drive strength and slew rate support
  • PWM support, QSPI controller support, NAND controller support, ISI support, ADC support
  • Reworked USB gadget driver. Updated endpoint allocation scheme. Fixed driver when working in FIFO mode only
  • I2S Multi Channel driver with support of up to 8 channels in TDM mode
  • Power management: ULP0 PM and Idle
  • Watchdog support, TRNG support, RTC support

• SAMA5D27 WLSOM1 drivers:
  • Backup and self-refresh support for LPDDR2
  • PTC support for QT1 Mutual/Self Capacitance and Q2 wings
  • Driver for the WILC3000 and WILC1000 release 15.2 in place in the Linux4SAM kernel and ready to use

New Yocto Project/Buildroot features:

• Full support for EGT (version 0.8.2 included)
• Support for two new boards: SAM9X60 Evaluation Kit and SAMA5D2 WLSOM1 EK
• Moved to the new Yocto branch, Warrior (2.7.1)
• Support for QT framework version 5.12.x is still included in the features

Demo Image for all boards. Choose headless (no video) or graphics option, your root filesystem flavor, flash and you're ready to go:

• Demo images for SAM9X60-EK
• Demo images for SAMA5D27 SOM1 EK
• Demo images for SAMA5D27 WLSOM1 EK
• Demo images for SAMA5D2 PTC EK
• Demo images for SAMA5D2 Xplained
• Demo images for SAMA5D3 Xplained
• Demo images for SAMA5D4 Xplained

• NAND and SPI + eMMC media types were flashed using SAM-BA 3.3

Yocto Project SDK based on Linux4SAM 6.2 release (Yocto Project 2.7.1 Warrior)

And all goodies of previous Linux4SAM revisions!

  Linux4SAM 6.1 demo directory  

• Linux kernel 4.19.x (+ LTS maintenance updates up to v4.19.56)
• AT91Bootstrap 3.8.13 with additional support for SAMA5D2 LPDDR2 SiP, improved eMMC bus detection, improved resume time from BSR state, support for waiting to load application with JTAG.
• U-Boot 2019.04 with PDA screen detection at boot time, FIT image support and overlay support. Check our FAQ for any questions
• Yocto Project 2.6.2 (Thud)
• Buildroot generated from 2019.05 revision using buildroot external
• OpenWrt Linux operating system : 18.06.2 stable branch
• Device tree overlays and FIT Image support
• The SAMA5D2-PTC-EK now features a full video demo as the other SAMA5 boards do

New kernel features:

• Redesign of the Image Sensor Controller (ISC) driver with new White balance enhanced features.
• Driver for the WILC3000 and WILC1000 release 15.2 in place in the Linux4SAM kernel and ready to use
• TWI hardware filters support that filter out possible glitches on the TWI wires for both SAMA5D4 Xplained and SAMA5D2 Xplained
• Add 9bit/Multidrop support in USART driver
• PIOBU pin controller driver
• MCP16502 PMIC driver
• ACT8945A: PM support (integrated in mainline)
• Ethernet: add runtime PM support (integrated in mainline)
• Ethernet: add backup and self-refresh support (integrated in mainline)
• Ethernet: use of NAPI GRO helpers to improve RX performance
• QSPI: move driver under the SPI-MEM interface. The controller can be used with NAND or NOR flashes.

New Yocto Project/Buildroot features:

• Update of QT framework to 5.12.x (latest LTS for QT5)
• Firmware version 15.2 for WILC3000 and WILC1000 Wi-Fi and Bluetooth together with all the required software components (wpa-supplicant, hostapd and more)
• Add 9bit serial demo applications for 9bit protocol demo

Demo Image for all boards. Choose with or without screen option, your root filesystem flavor, flash and you're ready to go: Demo Archive 6.1 page

• NAND and SPI + eMMC media types were flashed using SAM-BA 3.2.3

Yocto Project SDK based on Linux4SAM 6.1 release (Yocto Project 2.6.2 Thud)

And all goodies of previous Linux4SAM revisions!

  Linux4SAM 6.0 demo directory

• Linux kernel 4.14.x (+ LTS maintenance updates up to v4.14.73)
• AT91Bootstrap 3.8.11 with new support for DMA load from SD-Card/eMMC and 8-bit bus eMMC detect & support
• U-Boot 2018.07 with PDA screen detection at boot time, FIT image support and overlay support. Check our FAQ for any questions
• Yocto Project 2.5.1 (Sumo)
• Buildroot generated from 2018.02 revision using buildroot external
• OpenWrt Linux operating system based on master branch of the reunified LEDE / OpenWrt project: 18.06
• Device tree overlays and FIT Image support

New kernel features:

• use of Device Tree overlays for board variants and auto-identification of PDA screens when hardware permits
• handling for all low power modes ULP0/ULP1/Backup Self Refresh on SoC that support them
• add support for PDA 5" screen TM5000/AC320005-5
• add driver for the new Atmel I2S controller
• ADC: add resistive touchscreen support to SAMA5D2
• QSPI: add Global Block Unlock support and SFDP tables to support SST26 QSPI flash memories
• USB host: add the HSIC port support
• USART: add ISO7816 support to serial driver
• USART: add support for SPI mode in USART driver: spi-at91-usart
• fix to sama5d2 shutdown controller
• fix drive strength for NAND data pins on SAMA5D2-PTC-EK
• fix Ethernet macb TX stuck under certain conditions (net: macb: restart tx after tx used bit read)
• fix cts(cbc(aes)) and rfc4543(gcm(aes))) crypto modes

New Yocto Project/Buildroot features:

• new whiteboard Qt application with improved performance
• new wildwest Qt demo showing parallax effects with libplanes
• new Qt application interactively demonstrating software vs hardware scene objects
• new spacetouch application showing using all planes with a parallax effect
• new defconfigs for node-red out-of-the-box working setup (only on buildroot)
• new vision demo demonstrating machine vision with OpenCV (only on buildroot)
• Qt Creator support

Libplanes with support for YUV plane formats (support video formats)

MPIO additions:

• Add support for at91sam9x5
• Add support to change board/cpu through environment variables
• Add loopback test for SPI

iocontrol - add splash screen and startup time optimizations.

Demo Image for all boards. Choose with or without screen option, your root filesystem flavor, flash and you're ready to go: Demo Archive 6.0 page
NAND and SPI + eMMC media types were flashed using SAM-BA 3.2.3

Yocto Project SDK based on Linux4SAM 6.0 release (Yocto Project 2.5.1 "Sumo")

And all goodies of previous Linux4SAM revisions!

  Linux4SAM 5.8 demo directory

• Linux kernel 4.9.x (+ LTS maintenance updates up to v4.9.87)
• AT91Bootstrap 3.8.10
• U-Boot 2017.03 with Device Model / Device Tree support
• Yocto Project 2.4.2 (Rocko)
• Buildroot generated from latest 2018.02 revision with the new buildroot external
• OpenWrt filesystem solution based on master branch of the reunified LEDE / OpenWrt project
• Support for new SAMA5D2 PTC EK and dedicated page: Sama5d2PtcEKMainPage
• Support for the Peripheral Touch Controller (PTC), able to provide a Capacitive Touch interface. Linux driver uses it as an input device
• Use of QT LinuxFB with DRM/KMS backend without the need of wayland/weston nor OpenGLES (Mesa 3D)
• Libplanes graphical library for taking advantage of the LCD hardware overlays (2D Hardware operations)
• Availability of the new Microchip Peripheral I/O Python Package: mpio
• And all the goodies of previous Linux4SAM revisions!

Demo Image for all boards. Choose your screen option, your root filesystem flavor, flash and you're ready to go: Demo Archive 5.8 page

Yocto Project SDK based on Linux4SAM 5.8 release (Yocto Project 2.4.2 "Rocko")

  Yocto Project SDK

• install the SDK
• compile your project
• run on the board running the latest demo Linux4SAM 5.7

  Using the Image Sensor Controller (ISC)

  Pulse Width Modulation driver (PWM)

  Screens with SAMA5 Xplained boards

PDA Inc.

  SAMA5 Driver Model in U-Boot