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- From ace6abaa0f9203083fe4c0a6a74da2d96410b625 Mon Sep 17 00:00:00 2001
- From: Alexander Couzens <[email protected]>
- Date: Sat, 13 Aug 2022 12:49:33 +0200
- Subject: [PATCH 01/10] net: phy: realtek: rtl8221: allow to configure SERDES
- mode
- The rtl8221 supports multiple SERDES modes:
- - SGMII
- - 2500base-x
- - HiSGMII
- Further it supports rate adaption on SERDES links to allow
- slow ethernet speeds (10/100/1000mbit) to work on 2500base-x/HiSGMII
- links without reducing the SERDES speed.
- When operating without rate adapters the SERDES link will follow the
- ethernet speed.
- Signed-off-by: Alexander Couzens <[email protected]>
- ---
- drivers/net/phy/realtek.c | 48 +++++++++++++++++++++++++++++++++++++++
- 1 file changed, 48 insertions(+)
- --- a/drivers/net/phy/realtek.c
- +++ b/drivers/net/phy/realtek.c
- @@ -54,6 +54,15 @@
- RTL8201F_ISR_LINK)
- #define RTL8201F_IER 0x13
-
- +#define RTL8221B_MMD_SERDES_CTRL MDIO_MMD_VEND1
- +#define RTL8221B_MMD_PHY_CTRL MDIO_MMD_VEND2
- +#define RTL8221B_SERDES_OPTION 0x697a
- +#define RTL8221B_SERDES_OPTION_MODE_MASK GENMASK(5, 0)
- +#define RTL8221B_SERDES_OPTION_MODE_2500BASEX_SGMII 0
- +#define RTL8221B_SERDES_OPTION_MODE_HISGMII_SGMII 1
- +#define RTL8221B_SERDES_OPTION_MODE_2500BASEX 2
- +#define RTL8221B_SERDES_OPTION_MODE_HISGMII 3
- +
- #define RTL8366RB_POWER_SAVE 0x15
- #define RTL8366RB_POWER_SAVE_ON BIT(12)
-
- @@ -879,6 +888,48 @@ static irqreturn_t rtl9000a_handle_inter
- return IRQ_HANDLED;
- }
-
- +static int rtl8221b_config_init(struct phy_device *phydev)
- +{
- + u16 option_mode;
- +
- + switch (phydev->interface) {
- + case PHY_INTERFACE_MODE_2500BASEX:
- + if (!phydev->is_c45) {
- + option_mode = RTL8221B_SERDES_OPTION_MODE_2500BASEX;
- + break;
- + }
- + fallthrough;
- + case PHY_INTERFACE_MODE_SGMII:
- + option_mode = RTL8221B_SERDES_OPTION_MODE_2500BASEX_SGMII;
- + break;
- + default:
- + return 0;
- + }
- +
- + phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL,
- + 0x75f3, 0);
- +
- + phy_modify_mmd_changed(phydev, RTL8221B_MMD_SERDES_CTRL,
- + RTL8221B_SERDES_OPTION,
- + RTL8221B_SERDES_OPTION_MODE_MASK, option_mode);
- + switch (option_mode) {
- + case RTL8221B_SERDES_OPTION_MODE_2500BASEX_SGMII:
- + case RTL8221B_SERDES_OPTION_MODE_2500BASEX:
- + phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x6a04, 0x0503);
- + phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x6f10, 0xd455);
- + phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x6f11, 0x8020);
- + break;
- + case RTL8221B_SERDES_OPTION_MODE_HISGMII_SGMII:
- + case RTL8221B_SERDES_OPTION_MODE_HISGMII:
- + phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x6a04, 0x0503);
- + phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x6f10, 0xd433);
- + phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x6f11, 0x8020);
- + break;
- + }
- +
- + return 0;
- +}
- +
- static struct phy_driver realtek_drvs[] = {
- {
- PHY_ID_MATCH_EXACT(0x00008201),
- @@ -1033,6 +1084,7 @@ static struct phy_driver realtek_drvs[]
- PHY_ID_MATCH_EXACT(0x001cc849),
- .name = "RTL8221B-VB-CG 2.5Gbps PHY",
- .get_features = rtl822x_get_features,
- + .config_init = rtl8221b_config_init,
- .config_aneg = rtl822x_config_aneg,
- .read_status = rtl822x_read_status,
- .suspend = genphy_suspend,
- @@ -1044,6 +1096,7 @@ static struct phy_driver realtek_drvs[]
- .name = "RTL8221B-VM-CG 2.5Gbps PHY",
- .get_features = rtl822x_get_features,
- .config_aneg = rtl822x_config_aneg,
- + .config_init = rtl8221b_config_init,
- .read_status = rtl822x_read_status,
- .suspend = genphy_suspend,
- .resume = rtlgen_resume,
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