Re: Raspberry Pi POE+ hat overlay

Reply: Doug Rabson : "Re: Raspberry Pi POE+ hat overlay"
In reply to: Mark Millard : "Re: Raspberry Pi POE+ hat overlay"
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From: Doug Rabson <dfr_at_rabson.org>
Date: Sat, 13 May 2023 12:45:55 UTC
I was able to build an updated rpi-firmware port based on 1.20210805 and
this boots successfully on pi400 as well as rpi4. With this, I can load the
rpi-poe-plus overlay and I just need to try and reverse engineer the
undocumented mailbox API by reading the Linux code.

diff --git a/sysutils/rpi-firmware/Makefile b/sysutils/rpi-firmware/Makefile
index e82ab20ebc74..4fbb5df6d743 100644
--- a/sysutils/rpi-firmware/Makefile
+++ b/sysutils/rpi-firmware/Makefile
@@ -1,5 +1,5 @@
 PORTNAME= rpi-firmware
-PORTVERSION= 1.20210303.g20210303
+PORTVERSION= 1.20210805.g20210805
 CATEGORIES= sysutils

 MAINTAINER= uboot@FreeBSD.org
@@ -17,7 +17,7 @@ USE_GITHUB= yes

 GH_ACCOUNT= raspberrypi gonzoua:pscimon
 GH_PROJECT= firmware rpi3-psci-monitor:pscimon
-FW_TAG= fcf8d2f
+FW_TAG= 8939bde
 PSCI_TAG= 558620c
 GH_TAGNAME= ${FW_TAG} ${PSCI_TAG}:pscimon

diff --git a/sysutils/rpi-firmware/distinfo b/sysutils/rpi-firmware/distinfo
index 2e1e0c92066a..27a0eb8c9fa3 100644
--- a/sysutils/rpi-firmware/distinfo
+++ b/sysutils/rpi-firmware/distinfo
@@ -1,5 +1,5 @@
-TIMESTAMP = 1614939753
-SHA256 (raspberrypi-firmware-1.20210303.g20210303-fcf8d2f_GH0.tar.gz) =
5a0d7247490e0207f0fc32baabcec25a0e97ebdab9cbee216bf9537a1de22e69
-SIZE (raspberrypi-firmware-1.20210303.g20210303-fcf8d2f_GH0.tar.gz) =
192233875
+TIMESTAMP = 1683975782
+SHA256 (raspberrypi-firmware-1.20210805.g20210805-8939bde_GH0.tar.gz) =
2069df5b1dff340c78e393e4cc10feba395524d26cf5db475876d62b7a0507b2
+SIZE (raspberrypi-firmware-1.20210805.g20210805-8939bde_GH0.tar.gz) =
193244754
 SHA256 (gonzoua-rpi3-psci-monitor-558620c_GH0.tar.gz) =
7621db7933eedaa17a03c282ef8a50be597bd14366149dfa93172d1b3985dbb7
 SIZE (gonzoua-rpi3-psci-monitor-558620c_GH0.tar.gz) = 5614
diff --git a/sysutils/rpi-firmware/pkg-plist
b/sysutils/rpi-firmware/pkg-plist
index 7661a0a13cb2..02a41640a0be 100644
--- a/sysutils/rpi-firmware/pkg-plist
+++ b/sysutils/rpi-firmware/pkg-plist
@@ -183,6 +183,7 @@
 %%DATADIR%%/overlays/rpi-display.dtbo
 %%DATADIR%%/overlays/rpi-ft5406.dtbo
 %%DATADIR%%/overlays/rpi-poe.dtbo
+%%DATADIR%%/overlays/rpi-poe-plus.dtbo
 %%DATADIR%%/overlays/rpi-proto.dtbo
 %%DATADIR%%/overlays/rpi-sense.dtbo
 %%DATADIR%%/overlays/rpi-tv.dtbo

On Fri, 12 May 2023 at 18:41, Mark Millard <marklmi@yahoo.com> wrote:

> On May 12, 2023, at 10:19, Mark Millard <marklmi@yahoo.com> wrote:
>
> > On May 12, 2023, at 10:11, Mark Millard <marklmi@yahoo.com> wrote:
> >
> >> On May 12, 2023, at 09:38, Doug Rabson <dfr@rabson.org> wrote:
> >>
> >>> On Fri, 12 May 2023 at 17:27, Mark Millard <marklmi@yahoo.com> wrote:
> >>> On May 12, 2023, at 08:43, Doug Rabson <dfr@rabson.org> wrote:
> >>>
> >>>> I have a pi4 with the official POE+ hat which I want to run FreeBSD
> on. One thing I noticed is that the fan doesn't run in FreeBSD so I decided
> to try and write a little driver for it. First step seems to be to load the
> corresponding devicetree overlay by adding something like this to
> /boot/msdos/config.txt:
> >>>>
> >>>> dtoverlay=rpi-poe-plus
> >>>> dtparam=poe_fan_temp0=45000,dtparam=poe_fan_temp0_hyst=3000
> >>>> dtparam=poe_fan_temp1=50000,dtparam=poe_fan_temp1_hyst=3000
> >>>> dtparam=poe_fan_temp2=62000,dtparam=poe_fan_temp2_hyst=4000
> >>>> dtparam=poe_fan_temp3=70000,dtparam=poe_fan_temp3_hyst=5000
> >>>>
> >>>> Unfortunately this is where I'm stuck - the overlay is not present in
> the final DTB given to the kernel so there isn't anything to hook a driver
> to. Are dtoverlays supposed to work on FreeBSD?
> >>>
> >>> The RPi* firwmare version that FreeBSD has in ports and uses
> >>> in making snapshots and other images does not have that overlay:
> >>>
> >>> # ls -Tld /usr/local/share/rpi-firmware/overlays/rpi*
> >>> -rw-r--r--  1 root  wheel   489 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-backlight.dtbo
> >>> -rw-r--r--  1 root  wheel  4081 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-cirrus-wm5102.dtbo
> >>> -rw-r--r--  1 root  wheel   643 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-dac.dtbo
> >>> -rw-r--r--  1 root  wheel  2574 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-display.dtbo
> >>> -rw-r--r--  1 root  wheel   842 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-ft5406.dtbo
> >>> -rw-r--r--  1 root  wheel  2937 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-poe.dtbo
> >>> -rw-r--r--  1 root  wheel   771 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-proto.dtbo
> >>> -rw-r--r--  1 root  wheel   893 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-sense.dtbo
> >>> -rw-r--r--  1 root  wheel   567 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpi-tv.dtbo
> >>> -rw-r--r--  1 root  wheel  1226 Mar  3 05:29:57 2021
> /usr/local/share/rpi-firmware/overlays/rpivid-v4l2.dtbo
> >>>
> >>> You do not mention establishing a copy of overlays/rpi-poe-plus.dtbo .
> >>>
> >>> I copied the file from a rasbian install I had for another project.
> Perhaps I should find the corresponding source for it and build it with the
> device tree source from FreeBSD.
> >>>
> >>> You also do not mention what version of FreeBSD you are using
> >>> on the RPi4B. The output of the command:
> >>>
> >>> I'm running 13.2-RELEASE-p0
> >>
> >> That limits the range of firmware you can experiment with
> >> but the following tagged vintages should be compatible and
> >> also have an overlays/rpi-poe-plus.dtbo present:
> >>
> >> 1.20210527/boot/overlays/rpi-poe-plus.dtbo
> >> 1.20210727/boot/overlays/rpi-poe-plus.dtbo
> >> 1.20210805/boot/overlays/rpi-poe-plus.dtbo
> >>
> >> So extracting a consistent/full set of firmware and trying
> >> it is a possibility.
> >>
> >> The first 3 tags links on:
> >>
> >> https://github.com/raspberrypi/linux/tags?after=1.20210831
>
> That was likely a wasteful reference for me to supply. Trying
> again:
>
> https://github.com/raspberrypi/firmware/tags?after=1.20210831
>
> likely avoids ending up with a full set of linux materials
> to go along with the firmware (smaller download with a smaller
> expansion).
>
> >> are for the above 3 firmware versions.
> >>
> >> Anything newer will lead to a FreeBSD kernel crash for
> >> 13.2-RELEASE-p0 due to mishandling the .dtb file that
> >> would be used.
> >>
> >> As an example of what is in . . ./boot/ from one of those 3:
> >>
> >> # ls -Tld firmware-1.20210805/boot/*
> >> -rw-rw-r--  1 root  wheel    18693 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/COPYING.linux
> >> -rw-rw-r--  1 root  wheel     1594 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/LICENCE.broadcom
> >> -rw-rw-r--  1 root  wheel    26401 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2708-rpi-b-plus.dtb
> >> -rw-rw-r--  1 root  wheel    25749 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2708-rpi-b-rev1.dtb
> >> -rw-rw-r--  1 root  wheel    26138 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2708-rpi-b.dtb
> >> -rw-rw-r--  1 root  wheel    26060 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2708-rpi-cm.dtb
> >> -rw-rw-r--  1 root  wheel    27076 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2708-rpi-zero-w.dtb
> >> -rw-rw-r--  1 root  wheel    25883 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2708-rpi-zero.dtb
> >> -rw-rw-r--  1 root  wheel    27276 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2709-rpi-2-b.dtb
> >> -rw-rw-r--  1 root  wheel    27425 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2710-rpi-2-b.dtb
> >> -rw-rw-r--  1 root  wheel    29542 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2710-rpi-3-b-plus.dtb
> >> -rw-rw-r--  1 root  wheel    28923 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2710-rpi-3-b.dtb
> >> -rw-rw-r--  1 root  wheel    27421 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2710-rpi-cm3.dtb
> >> -rw-rw-r--  1 root  wheel    49825 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2711-rpi-4-b.dtb
> >> -rw-rw-r--  1 root  wheel    49821 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2711-rpi-400.dtb
> >> -rw-rw-r--  1 root  wheel    50499 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bcm2711-rpi-cm4.dtb
> >> -rw-rw-r--  1 root  wheel    52456 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/bootcode.bin
> >> -rw-rw-r--  1 root  wheel     7278 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/fixup.dat
> >> -rw-rw-r--  1 root  wheel     5407 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/fixup4.dat
> >> -rw-rw-r--  1 root  wheel     3211 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/fixup4cd.dat
> >> -rw-rw-r--  1 root  wheel     8416 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/fixup4db.dat
> >> -rw-rw-r--  1 root  wheel     8418 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/fixup4x.dat
> >> -rw-rw-r--  1 root  wheel     3211 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/fixup_cd.dat
> >> -rw-rw-r--  1 root  wheel    10262 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/fixup_db.dat
> >> -rw-rw-r--  1 root  wheel    10262 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/fixup_x.dat
> >> drwxrwxr-x  2 root  wheel      236 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/overlays
> >> -rw-rw-r--  1 root  wheel  2959904 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/start.elf
> >> -rw-rw-r--  1 root  wheel  2235712 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/start4.elf
> >> -rw-rw-r--  1 root  wheel   799964 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/start4cd.elf
> >> -rw-rw-r--  1 root  wheel  3731528 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/start4db.elf
> >> -rw-rw-r--  1 root  wheel  2987720 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/start4x.elf
> >> -rw-rw-r--  1 root  wheel   799964 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/start_cd.elf
> >> -rw-rw-r--  1 root  wheel  4803496 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/start_db.elf
> >> -rw-rw-r--  1 root  wheel  3711432 Aug  5 04:11:18 2021
> firmware-1.20210805/boot/start_x.elf
> >
> > Note the lack of config.txt , armstub8-gic.bin , and
> > armstub8.bin .
> >
> >> (I'll not list the overlays/* .)
> >>
> >> I've no clue to the consequences of mixing and matching
> >> materials from different vintages of the firmware. It
> >> does appear that:
> >>
> >> 1.20210727/boot/overlays/rpi-poe-plus.dtbo
> >> 1.20210805/boot/overlays/rpi-poe-plus.dtbo
> >>
> >> (the newer 2 of th3 3) are the same by content but that:
> >>
> >> 1.20210527/boot/overlays/rpi-poe-plus.dtbo
> >>
> >> is distinct in its older content.
> >
> > Be warned that the sys-utils/rpi-firmware port installs a
> > couple of files that are not based on
> > https://github.com/raspberrypi/ materials:
> >
> > # ls -Tld /boot/efi/armstub8*
> > -rwxr-xr-x  1 root  wheel  5888 Apr 20 19:25:22 2022
> /boot/efi/armstub8-gic.bin
> > -rwxr-xr-x  1 root  wheel  5888 Apr 20 19:25:22 2022
> /boot/efi/armstub8.bin
> >
> > Be sure to keep those 2 files in place (for at least
> > armstub8-gic.bin ). A similar point goes for your
> > config.txt .
>
>
> ===
> Mark Millard
> marklmi at yahoo.com
>
>