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Support i2c SFP/SFP+ Secuential SingleByte Reads to obtain transceiver details from EEPROM


Yakotik
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Could be very useful to include the feature to make that the keenetic. Routers with SFP/SFP+ ports be able to do sequential Single-Byte reads to obtain the transceiver specs and ddm from the EEPROM tables A0h/A2h for transceivers like GPON ONU SFP and others than only supports Single-Byte Reads and not multi-bytes reads (255 Bytes read per call).

Some of this transceivers doesn't have connected the two-wire interface SFP pins directly to the EEPROM, They have connected the 2-wire interface to a slave i2c interface of the SoC and then the SoC have a master i2c connection to the EEPROM.

in other cases the transceiver doesn't have a physically EEPROM and use a virtualized EEPROM allocated on the SPI Flash chip that comes available after the embedded OS is booted.

Implementing the detection of the EEPROM reads to switch automatically between Single-Byte and Multi-Byte reads should not so complex and will gives a plus in the interoperability between the different brands and models of SFP Transceivers apart of to make complies the SFF-8431

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9 минут назад, Padavan сказал:

Yes, we can add support such modules, because I2C master from SoC (mt7621/mt7622) is fully functional.

Please specify the full name of such modules (for debug).

 

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1 час назад, Padavan сказал:

Please specify the full name of such modules (for debug).

 You can buy a new model  XPON  DFP-34X-2C2

Edited by Yakotik
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On 7/21/2022 at 6:34 PM, Yakotik said:

Could be very useful to include the feature to make that the keenetic. Routers with SFP/SFP+ ports be able to do sequential Single-Byte reads to obtain the transceiver specs and ddm from the EEPROM tables A0h/A2h for transceivers like GPON ONU SFP and others than only supports Single-Byte Reads and not multi-bytes reads (255 Bytes read per call).

Some of this transceivers doesn't have connected the two-wire interface SFP pins directly to the EEPROM, They have connected the 2-wire interface to a slave i2c interface of the SoC and then the SoC have a master i2c connection to the EEPROM.

in other cases the transceiver doesn't have a physically EEPROM and use a virtualized EEPROM allocated on the SPI Flash chip that comes available after the embedded OS is booted.

Implementing the detection of the EEPROM reads to switch automatically between Single-Byte and Multi-Byte reads should not so complex and will gives a plus in the interoperability between the different brands and models of SFP Transceivers apart of to make complies the SFF-8431

I asked these questions a long time ago with the advice of the manufacturer Carlitoxx.

 

 

Edited by KYTECHNGAMING
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14 минуты назад, KYTECHNGAMING сказал:

I asked these questions a long time ago with the advice of the manufacturer Carlitoxx.

Please ask your questions to the kinetic workers

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