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Author	SHA1	Message	Date
Jiawen Wu	2a22b7ae2f	net: pcs: xpcs: adapt Wangxun NICs for SGMII mode Wangxun NICs support the connection with SFP to RJ45 module. In this case, PCS need to be configured in SGMII mode. According to chapter 6.11.1 "SGMII Auto-Negitiation" of DesignWare Cores Ethernet PCS (version 3.20a) and custom design manual, do the following configuration when the interface mode is SGMII. 1. program VR_MII_AN_CTRL bit(3) [TX_CONFIG] = 1b (PHY side SGMII) 2. program VR_MII_AN_CTRL bit(8) [MII_CTRL] = 1b (8-bit MII) 3. program VR_MII_DIG_CTRL1 bit(0) [PHY_MODE_CTRL] = 1b Also CL37 AN in backplane configurations need to be enabled because of the special hardware design. Another thing to note is that PMA needs to be reconfigured before each CL37 AN configuration for SGMII, otherwise AN will fail, although we don't know why. On this device, CL37_ANSGM_STS (bit[4:1] of VR_MII_AN_INTR_STS) indicates the status received from remote link during the auto-negotiation, and self-clear after the auto-negotiation is complete. Meanwhile, CL37_ANCMPLT_INTR will be set to 1, to indicate CL37 AN is complete. So add another way to get the state for CL37 SGMII. Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com> Signed-off-by: David S. Miller <davem@davemloft.net>	2023-08-25 07:42:59 +01:00
Jiawen Wu	f629acc6f2	net: pcs: xpcs: support to switch mode for Wangxun NICs According to chapter 6 of DesignWare Cores Ethernet PCS (version 3.20a) and custom design manual, add a configuration flow for switching interface mode. If the interface changes, the following setting is required: 1. wait VR_XS_PCS_DIG_STS bit(4, 2) [PSEQ_STATE] = 100b (Power-Good) 2. write SR_XS_PCS_CTRL2 to select various PCS type 3. write SR_PMA_CTRL1 and/or SR_XS_PCS_CTRL1 for link speed 4. program PMA registers 5. write VR_XS_PCS_DIG_CTRL1 bit(15) [VR_RST] = 1b (Vendor-Specific Soft Reset) 6. wait for VR_XS_PCS_DIG_CTRL1 bit(15) [VR_RST] to get cleared Only 10GBASE-R/SGMII/1000BASE-X modes are planned for the current Wangxun devices. And there is a quirk for Wangxun devices to switch mode although the interface in phylink state has not changed, since PCS will change to default 10GBASE-R when the ethernet driver(txgbe) do LAN reset. Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com> Signed-off-by: David S. Miller <davem@davemloft.net>	2023-08-25 07:42:58 +01:00

Author

SHA1

Message

Date

Jiawen Wu

2a22b7ae2f

net: pcs: xpcs: adapt Wangxun NICs for SGMII mode

Wangxun NICs support the connection with SFP to RJ45 module. In this case,
PCS need to be configured in SGMII mode.

According to chapter 6.11.1 "SGMII Auto-Negitiation" of DesignWare Cores
Ethernet PCS (version 3.20a) and custom design manual, do the following
configuration when the interface mode is SGMII.

1. program VR_MII_AN_CTRL bit(3) [TX_CONFIG] = 1b (PHY side SGMII)
2. program VR_MII_AN_CTRL bit(8) [MII_CTRL] = 1b (8-bit MII)
3. program VR_MII_DIG_CTRL1 bit(0) [PHY_MODE_CTRL] = 1b

Also CL37 AN in backplane configurations need to be enabled because of the
special hardware design. Another thing to note is that PMA needs to be
reconfigured before each CL37 AN configuration for SGMII, otherwise AN will
fail, although we don't know why.

On this device, CL37_ANSGM_STS (bit[4:1] of VR_MII_AN_INTR_STS) indicates
the status received from remote link during the auto-negotiation, and
self-clear after the auto-negotiation is complete.
Meanwhile, CL37_ANCMPLT_INTR will be set to 1, to indicate CL37 AN is
complete. So add another way to get the state for CL37 SGMII.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2023-08-25 07:42:59 +01:00

Jiawen Wu

f629acc6f2

net: pcs: xpcs: support to switch mode for Wangxun NICs

According to chapter 6 of DesignWare Cores Ethernet PCS (version 3.20a)
and custom design manual, add a configuration flow for switching interface
mode.

If the interface changes, the following setting is required:
1. wait VR_XS_PCS_DIG_STS bit(4, 2) [PSEQ_STATE] = 100b (Power-Good)
2. write SR_XS_PCS_CTRL2 to select various PCS type
3. write SR_PMA_CTRL1 and/or SR_XS_PCS_CTRL1 for link speed
4. program PMA registers
5. write VR_XS_PCS_DIG_CTRL1 bit(15) [VR_RST] = 1b (Vendor-Specific
   Soft Reset)
6. wait for VR_XS_PCS_DIG_CTRL1 bit(15) [VR_RST] to get cleared

Only 10GBASE-R/SGMII/1000BASE-X modes are planned for the current Wangxun
devices. And there is a quirk for Wangxun devices to switch mode although
the interface in phylink state has not changed, since PCS will change to
default 10GBASE-R when the ethernet driver(txgbe) do LAN reset.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2023-08-25 07:42:58 +01:00

2 Commits