genode/dde_linux
Norman Feske 435bdd5755 dde_linux: Support for Raspberry Pi
At the current stage, the USB HID and storage drivers are prinicpally
working but not stable. If interrupts are not processed fast enough,
devices will get sporadically disconnected.

The USB host-controller driver is not part of the normal Linux kernel.
For this reason, we need to download it separately. There exists a
'prepare_rpi' rule in the 'dde_linux/Makefile' to automate this process.
2013-11-25 09:46:09 +01:00
..
lib/mk dde_linux: Support for Raspberry Pi 2013-11-25 09:46:09 +01:00
patches usb_drv: Fix USB storage for x86 on hardware 2013-08-13 17:08:22 +02:00
run usb_drv: Fix PHY initialization for DWC3 XHCI 2013-10-24 15:21:36 +02:00
src dde_linux: Support for Raspberry Pi 2013-11-25 09:46:09 +01:00
Makefile dde_linux: Support for Raspberry Pi 2013-11-25 09:46:09 +01:00
README usb: Make host controller types configurable 2013-05-18 11:23:02 +02:00

Device drivers ported from the Linux kernel

USB
###

Controller configuration
~~~~~~~~~~~~~~~~~~~~~~~~

The driver can be started using different or all USB controller types a platform
offers (USB 1.0/2.0/3.0). Note that not all controllers are supported by all
platforms.  Controllers can be enabled as attribute in the config node of the
driver.  Supported attributes are: 'uhci', 'ehci', and 'xhci'.


Configuration snippet to enable UHCI and EHCI

! <config uhci="yes" ehci="yes">

HID
~~~

Supports keyboard and mouse. A run script can be found under 'run/usb_hid.run'.

Configuration snippet:

!<start name="usb_drv">
!  <resource name="RAM" quantum="3M"/>
!  <provides><service name="Input"/></provides>
!  <config uhci="yes" ehci="yes" xhci="yes">
!    <hid/>
!  </config>
!</start>

Note: It has been observed that certain 1.0 versions of Qemu do not generate
mouse interrupts. The mouse driver should work correctly on Qemu 1.0.93 and
above.

Storage
~~~~~~~

Currently supports one USB storage device. Hot plugging has not been tested. A
run script can be found under 'run/usb_storage.run'.

Configuration snippet:

!<start name="usb_drv">
!  <resource name="RAM" quantum="2M"/>
!  <provides> <service name="Block"/> </provides>
!  <config><storage /></config>
!</start uhci="yes">


Network (Nic)
~~~~~~~~~~~~~

Configuration snippet:

!<start name="usb_drv">
!  <resource name="RAM" quantum="3M"/>
!  <provides>
!    <service name="Nic"/>
!    <service name="Input"/>
!  </provides>
!  <config ehci="yes" xhci="yes">
!    <nic mac="2e:60:90:0c:4e:01" />
!    <hid/>
!  </config>
!</start>

Please observe that this setup starts the HID and Nic service at the same time.
Also there is the 'mac' attribute where one can specify the hardware address of
the network interface. This is necessary in case the EEPROM of the network card
cannot be accessed via the host controller making it impossible to retrieve the
devices hardware address. If this is the case and no 'mac' attribute is given a
fallback address will be assigned to the network device. Note that the fallback
address will always be the same.