Lup Yuen Lee 李立源 @lupyuen@qoto.org

How to power up #PinePhone USB Controller? Let’s consult U-Boot Bootloader

Article: https://lupyuen.github.io/articles/usb3?8#pinephone-usb-drivers-in-u-boot-bootloader

"USB EHCI HCSPARAMS=1101 ... What does this mean?"

#NuttX USB Driver fails at startup ... Because we haven't powered on #PinePhone USB Controller

Article: https://lupyuen.github.io/articles/usb3?7#halt-timeout-for-usb-controller

Tweaking the Apache #NuttX USB Driver for 64-bit #PinePhone

Article: https://lupyuen.github.io/articles/usb3?6#64-bit-update-for-ehci-driver

Here's how we configure the #NuttX USB Driver for #PinePhone

Article: https://lupyuen.github.io/articles/usb3?5#ehci-driver-from-apache-nuttx

"Summarise the latest messages on Pine64 Matrix chatroom"

#PinePhone (Allwinner A64) has 2 USB Ports ... One goes to External USB, the other goes to LTE Modem

Article: https://lupyuen.github.io/articles/usb3?4#pinephone-usb-controller

#PinePhone USB OTG is super complicated ... So we won't touch it today for Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/usb3?3#ehci-is-simpler-than-usb-on-the-go

#PinePhone USB EHCI Registers are (thankfully) documented in the Allwinner A64 manual

Article: https://lupyuen.github.io/articles/usb3?2#usb-enhanced-host-controller-interface

#PinePhone USB Programming is so much easier with USB EHCI ... Here's why

Article: https://lupyuen.github.io/articles/usb3?2#usb-enhanced-host-controller-interface

Building the #PinePhone USB Driver for Apache #NuttX Real-Time Operating System ... All shall be explained in this article

Article: https://lupyuen.github.io/articles/usb3?1

#PinePhone (Allwinner A64) has 2 USB Ports ... One goes to External USB, the other goes to LTE Modem

Source: https://github.com/lupyuen/pinephone-nuttx-usb#usb-enhanced-host-controller-interface-vs-on-the-go

How we fixed the #PinePhone USB Driver for Apache #NuttX RTOS ... Just start the USB Clocks and deassert the USB Resets

Source: https://github.com/lupyuen/pinephone-nuttx-usb#nuttx-ehci-driver-starts-ok-on-pinephone

Apache #NuttX USB Driver starts OK on #PinePhone yay! 🎉 Thanks to the super-inspiring coffee with @tllim 😀

Source: https://github.com/lupyuen/pinephone-nuttx-usb#nuttx-ehci-driver-starts-ok-on-pinephone

Resetting the #PinePhone USB Controller ... Our USB Driver for Apache #NuttX RTOS will set these Allwinner A64 Registers

Source: https://github.com/lupyuen/pinephone-nuttx-usb#usb-controller-reset

Clocks for #PinePhone USB Controller ... We'll enable them in our USB Driver for Apache #NuttX RTOS

Source: https://github.com/lupyuen/pinephone-nuttx-usb#usb-controller-clocks

#PinePhone USB Driver gets messy ... Because the USB Physical Layer is shared by EHCI USB Host Controller and Mentor Graphics USB OTG Controller

Source: https://github.com/lupyuen/pinephone-nuttx-usb#power-on-the-usb-controller

Here's how U-Boot Bootloader powers on #PinePhone's USB Controller ... We'll do the same for Apache #NuttX RTOS

Source: https://github.com/lupyuen/pinephone-nuttx-usb#power-on-the-usb-controller

HDCP Fail ugh #meWatch

#PinePhone Allwinner A64 has 2 USB Ports ... Both support EHCI, but only one supports OTG

Source: https://github.com/lupyuen/pinephone-nuttx-usb#usb-enhanced-host-controller-interface-vs-on-the-go