* Re: Raspberry Pi Barebox State Integration - SD card
[not found] <mailman.44637.1559659159.2376.barebox@lists.infradead.org>
@ 2019-06-05 4:26 ` Valentina Rusu
2019-06-05 6:46 ` Moritz Augsburger
0 siblings, 1 reply; 5+ messages in thread
From: Valentina Rusu @ 2019-06-05 4:26 UTC (permalink / raw)
To: barebox
Thank you for the response!
I had a quick look over this patch, I need to find a way to adapt it
for RPi 3, as vmmc-supply , reg_3v3, vqmmc-supply, reg_1v8 are not
configured for rpi 3 (they exist only for CM1 and CM3 as I have seen
in the device tree sources).
I don't know if there are any implications if I use those nodes
similar to CM3 (don't know the differences between 3 and CM3).
Best regards,
Vali.
> Date: Tue, 04 Jun 2019 10:59:23 +0200
> From: Moritz Augsburger <ml+barebox@moritz.augsburger.name>
> To: barebox@lists.infradead.org
> Subject: Re: Raspberry Pi Barebox State Integration - SD card
> Message-ID: <e7c88d1ca9dd8acc056490158be54e39@moritz.augsburger.name>
> Content-Type: text/plain; charset=US-ASCII; format=flowed
>
> Hi,
>
> Am 2019-06-04 08:32, schrieb Valentina Rusu:
> > The issue to integrate Barebox state are the following:
> > * we need to specify a backend for the "state" node;
> > * the backend should point to an of partition on a non-volatile memory;
> > * other boards have EEPROM, NAND besides SD card and they are
> > described in the device tree; RPi has no such thing;
> > * somehow I need to write the state on the SD card in a location where
> > does not interfere with the partitions created (boot, rootfs, user
> > partitions, etc);
> > * the SD card device (mci0) is automatically detected at startup, and
> > not described in the device tree;
>
> Below is a part of my patches, using the emmc on a Compute Module as
> state backend.
> It uses the region between MBR and first partition (starting @4MB) to
> save the state.
>
> The patch may contain changes already done to the latest version, so
> apply carefully.
>
> diff --git a/arch/arm/dts/bcm2837-rpi-3.dts
> b/arch/arm/dts/bcm2837-rpi-3.dts
> index 51883613c..420525b9e 100644
> --- a/arch/arm/dts/bcm2837-rpi-3.dts
> +++ b/arch/arm/dts/bcm2837-rpi-3.dts
> @@ -11,10 +11,5 @@
> };
>
> &sdhci {
> - pinctrl-0 = <&emmc_gpio48>;
> - /delete-node/ wifi@1;
> -};
> -
> -&sdhost {
> status = "disabled";
> };
> diff --git a/arch/arm/dts/bcm2837-rpi-cm3.dts
> b/arch/arm/dts/bcm2837-rpi-cm3.dts
> index cfbffe175..d0144dcbc 100644
> --- a/arch/arm/dts/bcm2837-rpi-cm3.dts
> +++ b/arch/arm/dts/bcm2837-rpi-cm3.dts
> @@ -8,11 +8,76 @@
> memory {
> reg = <0x0 0x0>;
> };
> +
> + state: state {
> + magic = <0x4d433230>;
> + compatible = "barebox,state";
> + backend-type = "raw";
> + backend = <&backend_state_sdhost>;
> + backend-storage-type = "circular";
> + backend-stridesize = <0x800>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + bootstate {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + system0 {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + remaining_attempts {
> + reg = <0x0 0x4>;
> + type = "uint32";
> + default = <3>;
> + };
> + priority {
> + reg = <0x4 0x4>;
> + type = "uint32";
> + default = <21>;
> + };
> + };
> +
> + system1 {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + remaining_attempts {
> + reg = <0x10 0x4>;
> + type = "uint32";
> + default = <3>;
> + };
> + priority {
> + reg = <0x14 0x4>;
> + type = "uint32";
> + default = <20>;
> + };
> + };
> + last_chosen {
> + reg = <0x2C 0x4>;
> + type = "uint32";
> + };
> + };
> + };
> +
> + aliases {
> + state = &state;
> + };
> +
> };
>
> -&sdhci {
> - pinctrl-0 = <&emmc_gpio48>;
> - no-sd;
> - non-removable;
> +&sdhost {
> + pinctrl-names = "default";
> + pinctrl-0 = <&sdhost_gpio48>;
> + bus-width = <4>;
> + vmmc-supply = <®_3v3>;
> + vqmmc-supply = <®_1v8>;
> status = "okay";
> + partitions {
> + compatible = "fixed-partitions";
> + #size-cells = <1>;
> + #address-cells = <1>;
> + backend_state_sdhost: part@200000 {
> + label = "state_sdhost";
> + reg = <0x200000 0x200000>;
> + };
> + };
> };
>
>
>
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Raspberry Pi Barebox State Integration - SD card
2019-06-05 4:26 ` Raspberry Pi Barebox State Integration - SD card Valentina Rusu
@ 2019-06-05 6:46 ` Moritz Augsburger
0 siblings, 0 replies; 5+ messages in thread
From: Moritz Augsburger @ 2019-06-05 6:46 UTC (permalink / raw)
To: Valentina Rusu; +Cc: barebox
Hi,
Am 2019-06-05 06:26, schrieb Valentina Rusu:
> Thank you for the response!
>
> I had a quick look over this patch, I need to find a way to adapt it
> for RPi 3, as vmmc-supply , reg_3v3, vqmmc-supply, reg_1v8 are not
> configured for rpi 3 (they exist only for CM1 and CM3 as I have seen
> in the device tree sources).
I guess these are leftovers from sdhost<->sdhci switching, the important
part is the partition definition inside sdhost.
Therefore, try leaving them out, as the upstream files already contain a
valid &sdhost definitions.
Best regards
Moritz
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Raspberry Pi Barebox State Integration - SD card
@ 2019-06-04 6:32 Valentina Rusu
2019-06-04 7:52 ` Tomaž Šolc
2019-06-04 8:59 ` Moritz Augsburger
0 siblings, 2 replies; 5+ messages in thread
From: Valentina Rusu @ 2019-06-04 6:32 UTC (permalink / raw)
To: barebox
Hello guys,
I want to integrate Barebox state for Raspberry Pi 3 in order to use
it along Barebox bootchooser and RAUC software update.
I have built my image using Yocto Pyro 2.3.2, barebox 2019.04.0 (added
a recipe in my meta layer, based on meta-barebox).
I have integrated Barebox bootchooser and tested it with some
hardcoded values for the target priority and remaining attempts. Works
fine.
The issue to integrate Barebox state are the following:
* we need to specify a backend for the "state" node;
* the backend should point to an of partition on a non-volatile memory;
* other boards have EEPROM, NAND besides SD card and they are
described in the device tree; RPi has no such thing;
* somehow I need to write the state on the SD card in a location where
does not interfere with the partitions created (boot, rootfs, user
partitions, etc);
* the SD card device (mci0) is automatically detected at startup, and
not described in the device tree;
I need to know how should I proceed? How should I describe that
"dynamic" device in my device tree, so I could point it in the
"backend" variable of the state node?
Thank you very much!
Best regards,
Vali.
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http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Raspberry Pi Barebox State Integration - SD card
2019-06-04 6:32 Valentina Rusu
@ 2019-06-04 7:52 ` Tomaž Šolc
2019-06-04 8:59 ` Moritz Augsburger
1 sibling, 0 replies; 5+ messages in thread
From: Tomaž Šolc @ 2019-06-04 7:52 UTC (permalink / raw)
To: barebox
Hi
On 4. 06. 19 08:32, Valentina Rusu wrote:
> * other boards have EEPROM, NAND besides SD card and they are
> described in the device tree; RPi has no such thing;
> * somehow I need to write the state on the SD card in a location
> where does not interfere with the partitions created (boot, rootfs,
> user partitions, etc);
Barebox on Raspberry Pi automatically saves nv variables to the
"barebox.env" file in the first partition - see rpi_env_init() in
rpi-common.c. This is usually the /boot partition with FAT that also has
the VideoCore firmware files, etc.
I have a working bootchooser setup for a board based on R.Pi CM3 using
this functionality. No special setup was required in barebox regard to
saving the bootchooser state.
I'm not familiar with meta-barebox and RAUC though.
Best regards
Tomaž
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Raspberry Pi Barebox State Integration - SD card
2019-06-04 6:32 Valentina Rusu
2019-06-04 7:52 ` Tomaž Šolc
@ 2019-06-04 8:59 ` Moritz Augsburger
1 sibling, 0 replies; 5+ messages in thread
From: Moritz Augsburger @ 2019-06-04 8:59 UTC (permalink / raw)
To: barebox
Hi,
Am 2019-06-04 08:32, schrieb Valentina Rusu:
> The issue to integrate Barebox state are the following:
> * we need to specify a backend for the "state" node;
> * the backend should point to an of partition on a non-volatile memory;
> * other boards have EEPROM, NAND besides SD card and they are
> described in the device tree; RPi has no such thing;
> * somehow I need to write the state on the SD card in a location where
> does not interfere with the partitions created (boot, rootfs, user
> partitions, etc);
> * the SD card device (mci0) is automatically detected at startup, and
> not described in the device tree;
Below is a part of my patches, using the emmc on a Compute Module as
state backend.
It uses the region between MBR and first partition (starting @4MB) to
save the state.
The patch may contain changes already done to the latest version, so
apply carefully.
diff --git a/arch/arm/dts/bcm2837-rpi-3.dts
b/arch/arm/dts/bcm2837-rpi-3.dts
index 51883613c..420525b9e 100644
--- a/arch/arm/dts/bcm2837-rpi-3.dts
+++ b/arch/arm/dts/bcm2837-rpi-3.dts
@@ -11,10 +11,5 @@
};
&sdhci {
- pinctrl-0 = <&emmc_gpio48>;
- /delete-node/ wifi@1;
-};
-
-&sdhost {
status = "disabled";
};
diff --git a/arch/arm/dts/bcm2837-rpi-cm3.dts
b/arch/arm/dts/bcm2837-rpi-cm3.dts
index cfbffe175..d0144dcbc 100644
--- a/arch/arm/dts/bcm2837-rpi-cm3.dts
+++ b/arch/arm/dts/bcm2837-rpi-cm3.dts
@@ -8,11 +8,76 @@
memory {
reg = <0x0 0x0>;
};
+
+ state: state {
+ magic = <0x4d433230>;
+ compatible = "barebox,state";
+ backend-type = "raw";
+ backend = <&backend_state_sdhost>;
+ backend-storage-type = "circular";
+ backend-stridesize = <0x800>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ bootstate {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ system0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ remaining_attempts {
+ reg = <0x0 0x4>;
+ type = "uint32";
+ default = <3>;
+ };
+ priority {
+ reg = <0x4 0x4>;
+ type = "uint32";
+ default = <21>;
+ };
+ };
+
+ system1 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ remaining_attempts {
+ reg = <0x10 0x4>;
+ type = "uint32";
+ default = <3>;
+ };
+ priority {
+ reg = <0x14 0x4>;
+ type = "uint32";
+ default = <20>;
+ };
+ };
+ last_chosen {
+ reg = <0x2C 0x4>;
+ type = "uint32";
+ };
+ };
+ };
+
+ aliases {
+ state = &state;
+ };
+
};
-&sdhci {
- pinctrl-0 = <&emmc_gpio48>;
- no-sd;
- non-removable;
+&sdhost {
+ pinctrl-names = "default";
+ pinctrl-0 = <&sdhost_gpio48>;
+ bus-width = <4>;
+ vmmc-supply = <®_3v3>;
+ vqmmc-supply = <®_1v8>;
status = "okay";
+ partitions {
+ compatible = "fixed-partitions";
+ #size-cells = <1>;
+ #address-cells = <1>;
+ backend_state_sdhost: part@200000 {
+ label = "state_sdhost";
+ reg = <0x200000 0x200000>;
+ };
+ };
};
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barebox@lists.infradead.org
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2019-06-05 4:26 ` Raspberry Pi Barebox State Integration - SD card Valentina Rusu
2019-06-05 6:46 ` Moritz Augsburger
2019-06-04 6:32 Valentina Rusu
2019-06-04 7:52 ` Tomaž Šolc
2019-06-04 8:59 ` Moritz Augsburger
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