Messages in this thread | | | From | Tao Ren <> | Subject | Re: [PATCH net-next v4 2/2] net: phy: broadcom: add 1000Base-X support for BCM54616S | Date | Thu, 8 Aug 2019 04:24:30 +0000 |
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Hi Heiner,
On 8/7/19 12:18 PM, Heiner Kallweit wrote: > On 06.08.2019 23:42, Tao Ren wrote: >> Hi Andrew / Heiner / Vladimir, >> >> On 8/6/19 2:09 PM, Tao Ren wrote: >>> The BCM54616S PHY cannot work properly in RGMII->1000Base-KX mode (for >>> example, on Facebook CMM BMC platform), mainly because genphy functions >>> are designed for copper links, and 1000Base-X (clause 37) auto negotiation >>> needs to be handled differently. >>> >>> This patch enables 1000Base-X support for BCM54616S by customizing 3 >>> driver callbacks: >>> >>> - probe: probe callback detects PHY's operation mode based on >>> INTERF_SEL[1:0] pins and 1000X/100FX selection bit in SerDES 100-FX >>> Control register. >>> >>> - config_aneg: bcm54616s_config_aneg_1000bx function is added for auto >>> negotiation in 1000Base-X mode. >>> >>> - read_status: BCM54616S and BCM5482 PHY share the same read_status >>> callback which manually set link speed and duplex mode in 1000Base-X >>> mode. >>> >>> Signed-off-by: Tao Ren <taoren@fb.com> >> >> I customized config_aneg function for BCM54616S 1000Base-X mode and link-down issue is also fixed: the patch is tested on Facebook CMM and Minipack BMC and everything looks normal. Please kindly review when you have bandwidth and let me know if you have further suggestions. >> >> BTW, I would be happy to help if we decide to add a set of genphy functions for clause 37, although that may mean I need more help/guidance from you :-) > > You want to have standard clause 37 aneg and this should be generic in phylib. > I hacked together a first version that is compile-tested only: > https://urldefense.proofpoint.com/v2/url?u=https-3A__patchwork.ozlabs.org_patch_1143631_&d=DwICaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=iYElT7HC77pRZ3byVvW8ng&m=ZJArOJvHqNkqvs1x8l9HjfxjCN8e5xJpPz2YViBuKRA&s=EskpfBQtu9IBVeb96dv-sz76xIz4tJK5-lD4-qdIyWI&e= > It supports fixed mode too. > > It doesn't support half duplex mode because phylib doesn't know 1000BaseX HD yet. > Not sure whether half duplex mode is used at all in reality. > > You could test the new core functions in your own config_aneg and read_status > callback implementations.
Thank you very much for the help! I'm planning to add these functions but I haven't started yet because I'm still going through clause 37 :-)
Let me apply your patch and run some test on my platform. Will share you results tomorrow.
Cheers,
Tao
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