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The wifi_drv now provides two reports. The first one contains all accesspoints that were found while scanning the supported frequencies. The second one reports the state of the driver, i.e., if it is conntected to an accesspoint or not. In addition to that, the driver now gets its configuration via a ROM session. More detailed information are available in 'repos/dde_linux/README'. Issue #1415.
176 lines
5.3 KiB
Plaintext
176 lines
5.3 KiB
Plaintext
Device drivers ported from the Linux kernel
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USB
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###
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Controller configuration
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~~~~~~~~~~~~~~~~~~~~~~~~
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The driver can be started using different or all USB controller types a platform
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offers (USB 1.0/2.0/3.0). Note that not all controllers are supported by all
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platforms. Controllers can be enabled as attribute in the config node of the
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driver. Supported attributes are: 'uhci', 'ehci', and 'xhci'.
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Configuration snippet to enable UHCI and EHCI
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! <config uhci="yes" ehci="yes">
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HID
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~~~
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Supports keyboard and mouse. A run script can be found under 'run/usb_hid.run'.
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Configuration snippet:
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!<start name="usb_drv">
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! <resource name="RAM" quantum="3M"/>
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! <provides><service name="Input"/></provides>
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! <config uhci="yes" ehci="yes" xhci="yes">
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! <hid/>
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! </config>
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!</start>
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Note: It has been observed that certain 1.0 versions of Qemu do not generate
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mouse interrupts. The mouse driver should work correctly on Qemu 1.0.93 and
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above.
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HID - Touchscreen support
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~~~~~~~~~~~~~~~~~~~~~~~~~
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Touchscreen absolute coordinates must be calibrated (e.g. re-calculated) to
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screen absolute coordinates. The screen resolution is not determined
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automatically by the USB driver, but can be configured as sub node of the
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hid xml tag:
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!...
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!<hid>
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! <screen x="1024" y="768"/>
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!<hid/>
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!...
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Storage
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~~~~~~~
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Currently supports one USB storage device. Hot plugging has not been tested. A
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run script can be found under 'run/usb_storage.run'.
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Configuration snippet:
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!<start name="usb_drv">
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! <resource name="RAM" quantum="2M"/>
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! <provides> <service name="Block"/> </provides>
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! <config><storage /></config>
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!</start uhci="yes">
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Network (Nic)
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~~~~~~~~~~~~~
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Configuration snippet:
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!<start name="usb_drv">
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! <resource name="RAM" quantum="3M"/>
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! <provides>
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! <service name="Nic"/>
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! <service name="Input"/>
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! </provides>
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! <config ehci="yes" xhci="yes">
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! <nic mac="2e:60:90:0c:4e:01" />
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! <hid/>
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! </config>
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!</start>
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Please observe that this setup starts the HID and Nic service at the same time.
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Also there is the 'mac' attribute where one can specify the hardware address of
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the network interface. This is necessary in case the EEPROM of the network card
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cannot be accessed via the host controller making it impossible to retrieve the
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devices hardware address. If this is the case and no 'mac' attribute is given a
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fallback address will be assigned to the network device. Note that the fallback
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address will always be the same.
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LXIP
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####
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LXIP is a port of the Linux TCP/IP stack to Genode. It is build as a shared
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library named 'lxip.lib.so'. The IP stack can be interfaced using Genode's
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version of 'libc' by linking your application to 'lxip_libc' plugin in your
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'target.mk' file.
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WIFI
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####
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The wifi_drv component is a port of the Linux mac802.11 stack, including the
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iwlwifi driver as well as libnl and wpa_supplicant, to Genode.
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Configuration snippet:
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!<start name="wifi_drv">
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! <resource name="RAM" quantum="32M"/>
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! <provides><service name="Nic"/></provides>
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! <config>
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! <libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/rtc">
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! <vfs>
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! <dir name="dev"> <log/> <rtc/>
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! <jitterentropy name="random"/>
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! <jitterentropy name="urandom"/>
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! </dir>
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! <inline name="wpa_supplicant.conf">
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!network={
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! id_str="foobar"
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! ssid="foobar"
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! key_mgmt=WPA-PSK
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! psk="foobarfoobar"
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!}
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! </inline>
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! </vfs>
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! </libc>
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! </config>
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! <route>
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! <service name="Rtc"> <any-child /> </service>
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! <any-service> <parent/> <any-child /> </any-service>
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! </route>
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!</start
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The wifi_drv creates two distinct reports to communicate its state and
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information about the wireless infrastructure to other components. The
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first one is a list of all available accesspoints. The following examplary
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report shows its structure:
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!<wlan_accesspoints>
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! <accesspoint ssid="skynet" bssid="00:01:02:03:04:05" quality="40"/>
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! <accesspoint ssid="foobar" bssid="01:02:03:04:05:06" quality="70" protection="WPA-PSK"/>
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! <accesspoint ssid="foobar" bssid="01:02:03:04:05:07" quality="10" protection="WPA-PSK"/>
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!</wlan_accesspoints>
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Each accesspoint node has attributes that contain the SSID and the BSSID
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of the accesspoint as well as the link quality (signal strength). These
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attributes are mandatory. If the network is protected, the node will also
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have an attribute describing the type of protection in addition.
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The second report provides information about the state of the connection
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to the currently connected accesspoint:
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!<wlan_state>
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! <accesspoint ssid="foobar" bssid="01:02:03:04:05:06" quality="70" protection="WPA-PSK" state="connected"/>
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!</wlan_state>
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Valid state values are 'connected', 'disconnected', 'connecting' and
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'disconnecting'.
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In return, the wifi_drv get its configuration via a ROM module. This ROM
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module contains the selected accesspoint. To connect to a accesspoint
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a report like the following is used:
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!<selected_accesspoint ssid="foobar" bssid="01:02:03:04:05:06" protection="WPA-PSK" psk="foobar123!"/>
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To disconnect from an accesspoint, a empty report is sent:
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!<selected_accesspoint/>
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By subscribing to both reports and providing the required ROM module, a
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component can control the wireless driver. An example therefore is the Qt
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based component in 'src/app/qt_wifi_connect'.
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Currently only WPA/WPA2 protection using a pre-shared key is supported.
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