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Message-ID: <TYCPR01MB8437B8B1654ED6575F3019F498C12@TYCPR01MB8437.jpnprd01.prod.outlook.com> Date: Sun, 23 Feb 2025 20:29:59 +0800 From: Shengyu Qu <wiagn233@...look.com> To: Bjørn Mork <bjorn@...k.no>, netdev@...r.kernel.org Cc: wiagn233@...look.com Subject: Re: Phy access methods for copper SFP+ disguised as SR Hi, Maybe rollball protocol? https://forum.banana-pi.org/t/sfp-oem-sfp-2-5g-t-kernel-phy/15872/ Best regards, Shengyu 在 2025/2/23 19:34, Bjørn Mork 写道: > Got myself a couple of cheap 10GBase-T SFP+s and am struggling to figure > out how to talk to the phy. The phy does not appear to be directly > accessible on 0x56, and it does not respond using the Rollball protocol > either. > > Are there any other well known methods out there, or am I stuck with > whatever SR emulation the SFP vendor implemented? > > This is all it shows, and 0x56 just reads zeroes no matter what I do: > > root@...8cl:~# i2cdetect -y 8 > 0 1 2 3 4 5 6 7 8 9 a b c d e f > 00: -- -- -- -- -- -- -- -- > 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > 50: 50 51 -- -- -- -- 56 -- -- -- -- -- -- -- -- -- > 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > 70: -- -- -- -- -- -- -- -- > root@...8cl:~# i2cdump -y 8 0x50 > No size specified (using byte-data access) > 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef > 00: 03 04 07 10 00 00 00 00 00 00 00 06 67 00 00 00 ????.......?g... > 10: 08 02 00 1e 4f 45 4d 20 20 20 20 20 20 20 20 20 ??.?OEM > 20: 20 20 20 20 00 00 00 00 53 46 50 2d 31 30 47 2d ....SFP-10G- > 30: 54 38 20 20 20 20 20 20 41 20 20 20 00 00 00 0c T8 A ...? > 40: 00 1a 00 00 46 32 35 30 31 31 34 54 30 30 31 30 .?..F250114T0010 > 50: 20 20 20 20 32 35 30 31 31 35 20 20 68 f0 03 eb 250115 h??? > 60: 00 00 11 6b e0 e7 c2 e1 ff ff 18 79 21 c8 24 ed ..?k????..?y!?$? > 70: d8 45 85 00 00 00 00 00 00 00 00 00 1c 24 98 22 ?E?.........?$?" > 80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > 90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > root@...8cl:~# i2cdump -y 8 0x51 > No size specified (using byte-data access) > 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef > 00: 50 00 f6 00 4b 00 fb 00 8c 9f 71 48 88 b8 75 30 P.?.K.?.??qH??u0 > 10: 1d 4c 01 f4 19 64 03 e8 2b d4 07 46 27 10 09 28 ?L???d??+??F'??( > 20: 2b d4 02 85 27 10 03 2c 00 00 00 00 00 00 00 00 +???'??,........ > 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 40: 00 00 00 00 3f 80 00 00 00 00 00 00 01 00 00 00 ....??......?... > 50: 01 00 00 00 01 00 00 00 01 00 00 00 00 00 00 7e ?...?...?......~ > 60: 42 33 7f ca 0b b8 13 92 13 92 00 00 00 00 00 00 B3????????...... > 70: 00 00 00 00 00 00 00 00 00 00 40 00 00 00 00 00 ..........@..... > 80: 43 4f 55 49 41 38 4e 43 41 41 31 30 2d 32 34 31 COUIA8NCAA10-241 > 90: 35 2d 30 33 56 30 33 20 01 00 46 00 00 00 00 c6 5-03V03 ?.F....? > a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 aa aa ..............?? > c0: 53 46 50 2d 31 30 47 2d 53 52 20 20 20 20 20 20 SFP-10G-SR > d0: 20 20 20 20 33 32 00 00 00 00 00 00 00 00 00 35 32.........5 > e0: 1e 28 2e 2e 31 34 29 36 00 00 00 00 00 00 00 00 ?(..14)6........ > f0: 00 00 00 00 00 66 00 00 ff ff ff ff ff ff 29 e3 .....f........)? > root@...8cl:~# i2cdump -y 8 0x56 > No size specified (using byte-data access) > 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef > 00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > > > Bjørn
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