DP83869HM: Ping fails for 1G, Forced 1G makes link go down; 100Mb/s works fine

KLN

Part Number: DP83869HM
Other Parts Discussed in Thread: DP83869

Hi Team,

We have Virtex ultrascale+ VU11P with DP83869 RGMII to copper interface.
We observe ping failed, host not alive. (Both PHY and PC set to 1G with Auto-negotiation disabled) and Link goes down when forced 1G Set with Auto-neg off.

When Auto-negotiation enabled(both side), trying to ping, results in switching to100Mb/s

Works fine with 100Mb/s
With Auto-negotiation off, Pinging at 1G, results failing to ping, with Link-up stable
When forced 1G set through writing 0x10h -5C00h, Link goes down
Followed writing register as per datasheet 9.4.8.1 RGMII-to-Copper Ethernet Mode

Let us know what else can be checked.

Checked 3324.DP83869_Schematic_Design_Review_Checklist.xlsx looks okay.

Thanks

10 months ago

0 Evan Mayhew 10 months ago

TI__Mastermind 20272 points

Hi KLN,

Is there an RGMII TX/RX clock delay applied on the MAC side?

Please confirm if the PHY/MAC delays are following this FAQ.

Register 0x32[1:0] can be used to program RGMII align/shift mode, please try align mode and share the results for link/ping in 100M and 1G.

Thank you,

Evan

0 KLN 10 months ago in reply to Evan Mayhew

Intellectual 320 points

Hi Evan Mayhew

We have tried varying RGMII Delays, still the same issue

We have read registers

U-Boot>
0.     (1140)                 -- PHY control register --
  (8000:0000) 0.15    =     0     reset
  (4000:0000) 0.14    =     0     loopback
  (2040:0040) 0. 6,13 =   b10    speed selection = 1000 Mbps
  (1000:1000) 0.12    =     1     A/N enable
  (0800:0000) 0.11    =     0     power-down
  (0400:0000) 0.10    =     0     isolate
  (0200:0000) 0. 9    =     0     restart A/N
  (0100:0100) 0. 8    =     1     duplex = full
  (0080:0000) 0. 7    =     0     collision test enable
  (003f:0000) 0. 5- 0 =     0     (reserved)



U-Boot>ping "169.254.xxx.xx"
Using ethernet@50040000 device

Abort
ping failed; host 169.254.xxx.xx is not alive
U-Boot>mii read 0x1 0x1
796D
U-Boot>mii read 0x1 0x0
1140
U-Boot>mii read 0x1 0x2
2000
U-Boot>mii read 0x1 0x3
A0F3
U-Boot>mii read 0x1 0x4
01E1
U-Boot>mii read 0x1 0x5
CC01
U-Boot>mii read 0x1 0x6
006F
U-Boot>mii read 0x1 0x7
2001
U-Boot>mii read 0x1 0x8
4006
U-Boot>mii read 0x1 0x9
0300
U-Boot>mii read 0x1 0xA
7800
U-Boot>mii read 0x1 0xB
0000
U-Boot>mii read 0x1 0xC
0000
U-Boot>mii read 0x1 0xD
0000
U-Boot>mii read 0x1 0xE
0000
U-Boot>mii read 0x1 0xF
F000
U-Boot>mii read 0x1 0x10
5048
U-Boot>mii read 0x1 0x11
BC02
U-Boot>mii read 0x1 0x12
0000
U-Boot>mii read 0x1 0x13
5DC6
U-Boot>mii read 0x1 0x14
29C7
U-Boot>mii read 0x1 0x15
0000
U-Boot>mii read 0x1 0x16
0000
U-Boot>mii read 0x1 0x17
0040
U-Boot>mii read 0x1 0x18
6150
U-Boot>mii read 0x1 0x19
4444
U-Boot>mii read 0x1 0x1A
0002
U-Boot>mii read 0x1 0x1E
0012
U-Boot>mii read 0x1 0x1F
0000
U-Boot>mii read 0x1 0x25
CC01
U-Boot>mii read 0x1 0x2C
0000
U-Boot>mii read 0x1 0x2D
0000
U-Boot>mii read 0x1 0x2E
0000
U-Boot>mii read 0x1 0x31
AC02
U-Boot>mii read 0x1 0x32
0000
U-Boot>mii read 0x1 0x33
0000
U-Boot>mii read 0x1 0x34
29C7
U-Boot>mii read 0x1 0x35
0000
U-Boot>mii read 0x1 0x36
0000
U-Boot>mii read 0x1 0x37
0040
U-Boot>mii read 0x1 0x38
6150
U-Boot>mii read 0x1 0x39
4444
U-Boot>mii read 0x1 0x3A
0002
U-Boot>mii read 0x1 0x43
A0F3
U-Boot>mii read 0x1 0x4F
F000
U-Boot>mii read 0x1 0x55
0000
U-Boot>mii read 0x1 0x6e
0000
U-Boot>mii read 0x1 0x86
006D
U-Boot>mii read 0x1 0x134
29C7
U-Boot>mii read 0x1 0x170
5048
U-Boot>mii read 0x1 0x180
1140
U-Boot>mii read 0x1 0x181
796D
U-Boot>mii read 0x1 0x182
2000
U-Boot>mii read 0x1 0x183
A0F3
U-Boot>mii read 0x1 0x184
01E1
U-Boot>mii read 0x1 0x185
CC01
U-Boot>mii read 0x1 0x190
5048
U-Boot>mii read 0x1 0x191
AC02
U-Boot>mii read 0x1 0x192
0000
U-Boot>mii read 0x1 0x193
0000
U-Boot>mii read 0x1 0x194
29C7
U-Boot>mii read 0x1 0x195
0000
U-Boot>mii read 0x1 0x196
0000
U-Boot>mii read 0x1 0x197
0040
U-Boot>mii read 0x1 0x198
6150
U-Boot>mii read 0x1 0x199
4444
U-Boot>mii read 0x1 0x1A4
01E1
U-Boot>mii read 0x1 0x1A5
CC01
U-Boot>mii read 0x1 0x1A6
006D
U-Boot>mii read 0x1 0x1DF
0000
U-Boot>mii read 0x1 0x1E0
1140
U-Boot>mii read 0x1 0x1EC
0000
U-Boot>mii read 0x1 0xC00
1140
U-Boot>mii read 0x1 0xc01
796D
U-Boot>mii read 0x1 0xc02
2000
U-Boot>mii read 0x1 0xc03
A0F3
U-Boot>mii read 0x1 0xc04
01E1
U-Boot>mii read 0x1 0xc05
CC01
U-Boot>mii read 0x1 0xc06
006D
U-Boot>mii read 0x1 0xc07
2001
U-Boot>mii read 0x1 0xc08
4006
U-Boot>mii read 0x1 0xc09
0300
U-Boot>mii read 0x1 0xc10
5048
U-Boot>mii read 0x1 0xc18
6150
U-Boot>mii read 0x1 0xc19
4444