2018-06-13 12:43 GMT+01:00 Emmanuel Vadot <m...@bidouilliste.com>:
> On 2018-06-12 18:45, Edward Tomasz Napierala wrote:
>
>> Author: trasz
>> Date: Tue Jun 12 16:45:52 2018
>> New Revision: 335004
>> URL: https://svnweb.freebsd.org/changeset/base/335004
>>
>> Log:
>> Enable USB OTG serial terminal on ARM SD card images. This configures
>> the system to make use of USB device mode / USB OTG to provide a
>> "virtual
>> serial port" on release images.
>>
>> Reviewed by: gjb@
>> MFC after: 2 weeks
>> Relnotes: yes
>> Sponsored by: The FreeBSD Foundation
>> Differential Revision: https://reviews.freebsd.org/D15602
>>
>> Modified:
>> head/release/tools/arm.subr
>>
>> Modified: head/release/tools/arm.subr
>> ============================================================
>> ==================
>> --- head/release/tools/arm.subr Tue Jun 12 16:44:13 2018 (r335003)
>> +++ head/release/tools/arm.subr Tue Jun 12 16:45:52 2018 (r335004)
>> @@ -92,6 +92,41 @@ arm_create_user() {
>> return 0
>> }
>>
>> +arm_setup_usb_otg() {
>> + # Set up virtual serial port over USB OTG / device mode.
>> + echo >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>> + echo '# Required for USB OTG virtual serial port.' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>> + echo 'notify 100 {' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>> + echo ' match "system" "DEVFS";' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>> + echo ' match "subsystem" "CDEV";' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>> + echo ' match "type" "CREATE";' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>> + echo ' match "cdev" "ttyU[0-9]+";' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>> + echo ' action "/sbin/init q";' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>> + echo '};' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/devd.conf
>>
>
> This will be wiped after the first update, better create
> /etc/devd/otg_serial.conf
>
Thanks, I'll look into that.
> + echo '# USB OTG virtual serial port' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/ttys
>> + echo 'ttyU0 "/usr/libexec/getty 3wire" vt100
>> onifconsole secure' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/ttys
>> + echo 'ttyU1 "/usr/libexec/getty 3wire" vt100
>> onifconsole secure' \
>> + >> ${CHROOTDIR}/${DESTDIR}/etc/ttys
>>
>
> If I have no OTG port and a usb<->uart plugged into my board that will
> give weird result no ?
>
No, because that port won't be marked as console. This only applies
to the "virtual" OTG serial ports.
> + echo '# Configure USB OTG; see usb_template(4).' \
>> + >> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
>> + echo 'hw.usb.template=3' \
>> + >> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
>> + echo 'umodem_load="YES"' \
>> + >> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
>>
>
> I'm not a big fan of always enabling this functionality. Do you have a
> board that have no uart but an otg port ?
>
I don't, but this makes it possible to use OTG-enabled boards without
using the console cable - having to check the pinouts, making sure the
voltage
is right etc. Do you see some problems this might cause?
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