[RFC PATCH 4/4] ARM: at91/dt: sama5d2: add nand0 and nfc0 nodes
Nicolas Ferre
nicolas.ferre at atmel.com
Wed Jan 13 06:51:19 PST 2016
Le 13/01/2016 13:39, Yang, Wenyou a écrit :
> Hi Romain,
>
> Confirmed.
>
> You are right. The tables are accessible.
Yes, confirmed by my colleague who wrote the ROMCode. It's different
from the sama5d4.
Gallois fields in ROM on sama5d2:
512 Bytes: @ 0x40000 (32 KBytes)
1024 Bytes: @ 0x48000 (96 KBytes)
even if the datasheet is not completely updated yet...
Bye,
> Please ignore my comments.
>
>
> Best Regards,
> Wenyou Yang
>
>> -----Original Message-----
>> From: Yang, Wenyou
>> Sent: 2016年1月13日 19:29
>> To: 'romain izard' <romain.izard at mobile-devices.fr>
>> Cc: linux-mtd at lists.infradead.org; devicetree at vger.kernel.org; Ferre, Nicolas
>> <Nicolas.FERRE at atmel.com>
>> Subject: RE: [RFC PATCH 4/4] ARM: at91/dt: sama5d2: add nand0 and nfc0
>> nodes
>>
>> Hi Romain,
>>
>>> -----Original Message-----
>>> From: romain izard [mailto:romain.izard at mobile-devices.fr]
>>> Sent: 2016年1月13日 17:41
>>> To: Yang, Wenyou <Wenyou.Yang at atmel.com>
>>> Cc: linux-mtd at lists.infradead.org; devicetree at vger.kernel.org; Ferre,
>>> Nicolas <Nicolas.FERRE at atmel.com>
>>> Subject: Re: [RFC PATCH 4/4] ARM: at91/dt: sama5d2: add nand0 and nfc0
>>> nodes
>>>
>>> 2016-01-13 7:06 GMT+01:00 Yang, Wenyou <Wenyou.Yang at atmel.com>:
>>>>
>>>>> -----Original Message-----
>>>>> From: linux-mtd [mailto:linux-mtd-bounces at lists.infradead.org] On
>>>>> Behalf Of Romain Izard
>>>>> Sent: 2016年1月12日 22:34
>>>>> To: linux-mtd at lists.infradead.org; devicetree at vger.kernel.org
>>>>> Cc: Wu, Josh <Josh.wu at atmel.com>; Romain Izard
>>>>> <romain.izard.pro at gmail.com>; Ferre, Nicolas
>>>>> <Nicolas.FERRE at atmel.com>
>>>>> Subject: [RFC PATCH 4/4] ARM: at91/dt: sama5d2: add nand0 and nfc0
>>>>> nodes
>>>>>
>>>>> Both nodes are required to access NAND Flash memory. Additional
>>>>> settings will be necessary at the board level to use it.
>>>>>
>>>>> Signed-off-by: Romain Izard <romain.izard.pro at gmail.com>
>>>>> ---
>>>>> arch/arm/boot/dts/sama5d2.dtsi | 38
>>>>> ++++++++++++++++++++++++++++++++++++++
>>>>> 1 file changed, 38 insertions(+)
>>>>>
>>>>> diff --git a/arch/arm/boot/dts/sama5d2.dtsi
>>>>> b/arch/arm/boot/dts/sama5d2.dtsi index aee571448342..80420177ec1a
>>>>> 100644
>>>>> --- a/arch/arm/boot/dts/sama5d2.dtsi
>>>>> +++ b/arch/arm/boot/dts/sama5d2.dtsi
>>>>> @@ -265,6 +265,44 @@
>>>>> cache-level = <2>;
>>>>> };
>>>>>
>>>>> + nand0: nand at 80000000 {
>>>>> + compatible = "atmel,sama5d2-nand";
>>>>> + #address-cells = <1>;
>>>>> + #size-cells = <1>;
>>>>> + ranges;
>>>>> + reg = < /* EBI CS3 */
>>>>> + 0x80000000 0x08000000
>>>>> + /* SMC PMECC regs */
>>>>> + 0xf8014070 0x00000490
>>>>> + /* SMC PMECC Error Location regs */
>>>>> + 0xf8014500 0x00000200
>>>>> + /* ROM Galois tables */
>>>>> + 0x00040000 0x00018000
>>>>
>>>> As there is no PMECC lookup table in ROM exported, remove this line.
>>>>
>>>
>>> From what I see in the SAMA5D2 xplained board on my table, it is not the case.
>>> Reading at addresses 0x40000 and 0x48000 from U-Boot, I see data that
>>> looks identical to the Galois tables in the Atmel example code.
>>>
>>> U-Boot> md.w 0x40000
>>> 00040000: ffff 0000 0001 03a6 0002 074c 03a7 18c0
>>> 00040010: 0003 1c66 074d 01ea 03a8 005d 18c1 0af2
>>> 00040020: 0004 0e98 1c67 183e 074e 1181 01eb 0403
>>> 00040030: 03a9 119c 005e 000d 18c2 0590 0af3 1877
>>> 00040040: 0005 1c1d 0e99 191d 1c68 0d6f 183f 0936
>>> 00040050: 074f 13d9 1182 1542 01ec 03b3 0404 1395
>>> 00040060: 03aa 1aaa 119d 123e 005f 1be4 000e 0bda
>>> 00040070: 18c3 07a9 0591 1d35 0af4 19ae 1878 1527
>>>
>>> U-Boot> md.w 0x48000
>>> 00048000: ffff 0000 0001 0572 0002 0ae4 0573 015b
>>> 00048010: 0003 06cd 0ae5 1ad9 0574 012e 015c 1056
>>> 00048020: 0004 15c8 06ce 288d 0ae6 02b6 1ada 06a0
>>> 00048030: 0575 2ed2 012f 0c3f 015d 204b 1057 3812
>>> 00048040: 0005 3d84 15c9 0289 06cf 347d 288e 25bd
>>> 00048050: 0ae7 10d1 02b7 3444 1adb 11b1 06a1 109c
>>> 00048060: 0576 1c34 2ed3 1b3a 0130 2dff 0c40 2238
>>> 00048070: 015e 0c12 204c 3d67 1058 3f47 3813 0828
>>>
>>>
>>> This location matches the information in the SAMA5D2 datasheet from
>>> chapter 6, "Memories", but not the contradicting information from
>>> chapter 14, "Standard Boot Strategies".
>>
>> As I known, the Galois Field Table should not exported since SAMA5D4, I will
>> check with the system team.
>>
>>>
>>>>> + >;
>>>>> + interrupts = <17 IRQ_TYPE_LEVEL_HIGH 6>;
>>>>> + atmel,nand-addr-offset = <21>;
>>>>> + atmel,nand-cmd-offset = <22>;
>>>>> + atmel,nand-has-dma;
>>>>> + atmel,has-pmecc;
>>>>> + atmel,pmecc-lookup-table-offset = <0x0
>>>>> + 0x8000>;
>>>>
>>>> Ditto, remove this line.
>>>>
>>>>> + status = "disabled";
>>>>> +
>>>>> + nfc at 90000000 {
>>>>> + compatible = "atmel,sama5d4-nfc";
>>>>> + #address-cells = <1>;
>>>>> + #size-cells = <1>;
>>>>> + reg = < /* NFC Command Registers */
>>>>> + 0xC0000000 0x08000000
>>>>> + /* NFC HSMC regs */
>>>>> + 0xf8014000 0x00000070
>>>>> + /* NFC SRAM banks */
>>>>> + 0x00100000 0x00100000
>>>>> + >;
>>>>> + clocks = <&hsmc_clk>;
>>>>> + atmel,write-by-sram;
>>>>> + };
>>>>> + };
>>>>> +
>>>>> sdmmc0: sdio-host at a0000000 {
>>>>> compatible = "atmel,sama5d2-sdhci";
>>>>> reg = <0xa0000000 0x300>;
>>>>> --
>>>>> 2.5.0
>>>>>
>>>
>>>
>>> Best regards
>>> --
>>> Romain Izard
>>
>>
>> Best Regards,
>> Wenyou Yang
--
Nicolas Ferre
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