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kernel: net: phy: realtek: improve RealTek 2.5G PHY driver

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* use interface mode switching only when operating in C45 mode
   Linux prevents switching the interface mode when using C22 MDIO,
   hence use rate-adapter mode in case the PHY controlled via C22.

 * use phy_read_paged where appropriate

 * use existing generic inline functions to handle 10GbE advertisements
   instead of redundantly defining register macros in realtek.c which
   are not actually vendor-specific.

 * make sure 10GbE advertisement is valid, preventing false-positive
   warning "Downshift occurred from negotiated speed 2.5Gbps to actual
   speed 1Gbps, check cabling!" with some link-partners using 1G mode.

 * Support Link Down Power Saving Mode (ALDPS)

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2023-04-22 01:52:04 +01:00
parent b64c471b8e
commit 998b973157
8 changed files with 251 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
target/linux/generic/pending-5.15/721-net-phy-realtek-rtl8221-allow-to-configure-SERDES-mo.patch
View File

@ -39,7 +39,7 @@ Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
#define RTL8366RB_POWER_SAVE 0x15
#define RTL8366RB_POWER_SAVE_ON BIT(12)
@@ -841,6 +850,43 @@ static irqreturn_t rtl9000a_handle_inter
@@ -841,6 +850,48 @@ static irqreturn_t rtl9000a_handle_inter
return IRQ_HANDLED;
}
@ -48,8 +48,13 @@ Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
+ u16 option_mode;
+
+ switch (phydev->interface) {
+ case PHY_INTERFACE_MODE_SGMII:
+ 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:
@ -57,24 +62,24 @@ Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
+ }
+
+ phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL,
+ 0x75f3, 0);
+ 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;
+ 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;
@ -83,19 +88,19 @@ Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
static struct phy_driver realtek_drvs[] = {
{
PHY_ID_MATCH_EXACT(0x00008201),
@@ -981,6 +1027,7 @@ static struct phy_driver realtek_drvs[]
@@ -981,6 +1032,7 @@ 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_init = rtl8221b_config_init,
.config_aneg = rtl822x_config_aneg,
.read_status = rtl822x_read_status,
.suspend = genphy_suspend,
@@ -992,6 +1039,7 @@ static struct phy_driver realtek_drvs[]
@@ -992,6 +1044,7 @@ 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,
+ .config_init = rtl8221b_config_init,
.read_status = rtl822x_read_status,
.suspend = genphy_suspend,
.resume = rtlgen_resume,

2
target/linux/generic/pending-5.15/722-net-phy-realtek-support-switching-between-SGMII-and-.patch
View File

@ -52,7 +52,7 @@ Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
return ret;
- return rtlgen_get_speed(phydev);
+ if (phydev->link)
+ if (phydev->is_c45 && phydev->link)
+ rtl822x_update_interface(phydev);
+
+ return 0;

12
target/linux/generic/pending-5.15/724-net-phy-realtek-use-genphy_soft_reset-for-2.5G-PHYs.patch
View File

@ -15,7 +15,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -1013,6 +1013,7 @@ static struct phy_driver realtek_drvs[]
@@ -1018,6 +1018,7 @@ static struct phy_driver realtek_drvs[]
.write_page = rtl821x_write_page,
.read_mmd = rtl822x_read_mmd,
.write_mmd = rtl822x_write_mmd,
@ -23,7 +23,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
}, {
PHY_ID_MATCH_EXACT(0x001cc840),
.name = "RTL8226B_RTL8221B 2.5Gbps PHY",
@@ -1025,6 +1026,7 @@ static struct phy_driver realtek_drvs[]
@@ -1030,6 +1031,7 @@ static struct phy_driver realtek_drvs[]
.write_page = rtl821x_write_page,
.read_mmd = rtl822x_read_mmd,
.write_mmd = rtl822x_write_mmd,
@ -31,7 +31,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
}, {
PHY_ID_MATCH_EXACT(0x001cc838),
.name = "RTL8226-CG 2.5Gbps PHY",
@@ -1035,6 +1037,7 @@ static struct phy_driver realtek_drvs[]
@@ -1040,6 +1042,7 @@ static struct phy_driver realtek_drvs[]
.resume = rtlgen_resume,
.read_page = rtl821x_read_page,
.write_page = rtl821x_write_page,
@ -39,7 +39,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
}, {
PHY_ID_MATCH_EXACT(0x001cc848),
.name = "RTL8226B-CG_RTL8221B-CG 2.5Gbps PHY",
@@ -1045,6 +1048,7 @@ static struct phy_driver realtek_drvs[]
@@ -1050,6 +1053,7 @@ static struct phy_driver realtek_drvs[]
.resume = rtlgen_resume,
.read_page = rtl821x_read_page,
.write_page = rtl821x_write_page,
@ -47,7 +47,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
}, {
PHY_ID_MATCH_EXACT(0x001cc849),
.name = "RTL8221B-VB-CG 2.5Gbps PHY",
@@ -1056,6 +1060,7 @@ static struct phy_driver realtek_drvs[]
@@ -1061,6 +1065,7 @@ static struct phy_driver realtek_drvs[]
.resume = rtlgen_resume,
.read_page = rtl821x_read_page,
.write_page = rtl821x_write_page,
@ -55,7 +55,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
}, {
PHY_ID_MATCH_EXACT(0x001cc84a),
.name = "RTL8221B-VM-CG 2.5Gbps PHY",
@@ -1067,6 +1072,7 @@ static struct phy_driver realtek_drvs[]
@@ -1072,6 +1077,7 @@ static struct phy_driver realtek_drvs[]
.resume = rtlgen_resume,
.read_page = rtl821x_read_page,
.write_page = rtl821x_write_page,

10
target/linux/generic/pending-5.15/725-net-phy-realtek-disable-SGMII-in-band-AN-for-2-5G-PHYs.patch
View File

@ -26,17 +26,17 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+ int val;
switch (phydev->interface) {
case PHY_INTERFACE_MODE_SGMII:
@@ -906,6 +907,13 @@ static int rtl8221b_config_init(struct p
break;
case PHY_INTERFACE_MODE_2500BASEX:
@@ -911,6 +912,13 @@ static int rtl8221b_config_init(struct p
break;
}
+ /* Disable SGMII AN */
+ phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7588, 0x2);
+ phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7589, 0x71d0);
+ phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7587, 0x3);
+ phy_read_mmd_poll_timeout(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7587, val,
+ !(val & BIT(0)), 500, 100000, false);
+ phy_read_mmd_poll_timeout(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7587,
+ val, !(val & BIT(0)), 500, 100000, false);
+
return 0;
}

27
target/linux/generic/pending-5.15/726-net-phy-realtek-use-phy_read_paged-instead-of-open-c.patch Normal file
View File

@ -0,0 +1,27 @@
From 934cdd67e7cf71f97a2a8aea2892e540af47dcdf Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Sat, 22 Apr 2023 01:21:14 +0100
Subject: [PATCH 1/3] net: phy: realtek: use phy_read_paged instead of open
coding
Instead of open coding a paged read, use the phy_read_paged function
in rtlgen_supports_2_5gbps.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/phy/realtek.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -727,9 +727,7 @@ static bool rtlgen_supports_2_5gbps(stru
{
int val;
- phy_write(phydev, RTL821x_PAGE_SELECT, 0xa61);
- val = phy_read(phydev, 0x13);
- phy_write(phydev, RTL821x_PAGE_SELECT, 0);
+ val = phy_read_paged(phydev, 0xa61, 0x13);
return val >= 0 && val & RTL_SUPPORTS_2500FULL;
}

60
target/linux/generic/pending-5.15/727-net-phy-realtek-use-inline-functions-for-10GbE-adver.patch Normal file
View File

@ -0,0 +1,60 @@
From 92c8b9d558160d94b981dd8a2b9c47657627ffdc Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Sat, 22 Apr 2023 01:23:08 +0100
Subject: [PATCH 2/3] net: phy: realtek: use inline functions for 10GbE
advertisement
Use existing generic inline functions to encode local advertisement
of 10GbE link modes as well as to decode link-partner advertisement.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/phy/realtek.c | 22 +++++-----------------
1 file changed, 5 insertions(+), 17 deletions(-)
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -68,10 +68,6 @@
#define RTL_SUPPORTS_5000FULL BIT(14)
#define RTL_SUPPORTS_2500FULL BIT(13)
#define RTL_SUPPORTS_10000FULL BIT(0)
-#define RTL_ADV_2500FULL BIT(7)
-#define RTL_LPADV_10000FULL BIT(11)
-#define RTL_LPADV_5000FULL BIT(6)
-#define RTL_LPADV_2500FULL BIT(5)
#define RTL9000A_GINMR 0x14
#define RTL9000A_GINMR_LINK_STATUS BIT(4)
@@ -661,14 +657,11 @@ static int rtl822x_config_aneg(struct ph
int ret = 0;
if (phydev->autoneg == AUTONEG_ENABLE) {
- u16 adv2500 = 0;
-
- if (linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
- phydev->advertising))
- adv2500 = RTL_ADV_2500FULL;
-
ret = phy_modify_paged_changed(phydev, 0xa5d, 0x12,
- RTL_ADV_2500FULL, adv2500);
+ MDIO_AN_10GBT_CTRL_ADV10G |
+ MDIO_AN_10GBT_CTRL_ADV5G |
+ MDIO_AN_10GBT_CTRL_ADV2_5G,
+ linkmode_adv_to_mii_10gbt_adv_t(phydev->advertising));
if (ret < 0)
return ret;
}
@@ -705,12 +698,7 @@ static int rtl822x_read_status(struct ph
if (lpadv < 0)
return lpadv;
- linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
- phydev->lp_advertising, lpadv & RTL_LPADV_10000FULL);
- linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
- phydev->lp_advertising, lpadv & RTL_LPADV_5000FULL);
- linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
- phydev->lp_advertising, lpadv & RTL_LPADV_2500FULL);
+ mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, lpadv);
}
ret = rtlgen_read_status(phydev);

28
target/linux/generic/pending-5.15/728-net-phy-realtek-check-validity-of-10GbE-link-partner.patch Normal file
View File

@ -0,0 +1,28 @@
From 929bb4d3cfbc7878326c0771a01a636d49c54b40 Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Sat, 22 Apr 2023 01:25:39 +0100
Subject: [PATCH 3/3] net: phy: realtek: check validity of 10GbE link-partner
advertisement
Only use link-partner advertisement bits for 10GbE modes if they are
actually valid. Check LOCALOK and REMOTEOK bits and clear 10GbE modes
unless both of them are set.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/phy/realtek.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -698,6 +698,10 @@ static int rtl822x_read_status(struct ph
if (lpadv < 0)
return lpadv;
+ if (!(lpadv & MDIO_AN_10GBT_STAT_REMOK) ||
+ !(lpadv & MDIO_AN_10GBT_STAT_LOCOK))
+ lpadv = 0;
+
mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, lpadv);
}

100
target/linux/generic/pending-5.15/729-net-phy-realtek-introduce-rtl822x_probe.patch Normal file
View File

@ -0,0 +1,100 @@
From 9155098547fb1172d4fa536f3f6bc9d42f59d08c Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Sat, 22 Apr 2023 03:26:01 +0100
Subject: [PATCH] net: phy: realtek: setup ALDPS on RTL822x
Setup Link Down Power Saving Mode according the DTS property
just like for RTL821x 1GE PHYs.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/phy/realtek.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -62,6 +62,10 @@
#define RTL8221B_SERDES_OPTION_MODE_2500BASEX 2
#define RTL8221B_SERDES_OPTION_MODE_HISGMII 3
+#define RTL8221B_PHYCR1 0xa430
+#define RTL8221B_PHYCR1_ALDPS_EN BIT(2)
+#define RTL8221B_PHYCR1_ALDPS_XTAL_OFF_EN BIT(12)
+
#define RTL8366RB_POWER_SAVE 0x15
#define RTL8366RB_POWER_SAVE_ON BIT(12)
@@ -736,6 +741,25 @@ static int rtl8226_match_phy_device(stru
rtlgen_supports_2_5gbps(phydev);
}
+static int rtl822x_probe(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ int val;
+
+ val = phy_read_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, RTL8221B_PHYCR1);
+ if (val < 0)
+ return val;
+
+ if (of_property_read_bool(dev->of_node, "realtek,aldps-enable"))
+ val |= RTL8221B_PHYCR1_ALDPS_EN | RTL8221B_PHYCR1_ALDPS_XTAL_OFF_EN;
+ else
+ val &= ~(RTL8221B_PHYCR1_ALDPS_EN | RTL8221B_PHYCR1_ALDPS_XTAL_OFF_EN);
+
+ phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, RTL8221B_PHYCR1, val);
+
+ return 0;
+}
+
static int rtlgen_resume(struct phy_device *phydev)
{
int ret = genphy_resume(phydev);
@@ -1009,6 +1030,7 @@ static struct phy_driver realtek_drvs[]
.match_phy_device = rtl8226_match_phy_device,
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
+ .probe = rtl822x_probe,
.read_status = rtl822x_read_status,
.suspend = genphy_suspend,
.resume = rtlgen_resume,
@@ -1022,6 +1044,7 @@ static struct phy_driver realtek_drvs[]
.name = "RTL8226B_RTL8221B 2.5Gbps PHY",
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
+ .probe = rtl822x_probe,
.read_status = rtl822x_read_status,
.suspend = genphy_suspend,
.resume = rtlgen_resume,
@@ -1035,6 +1058,7 @@ static struct phy_driver realtek_drvs[]
.name = "RTL8226-CG 2.5Gbps PHY",
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
+ .probe = rtl822x_probe,
.read_status = rtl822x_read_status,
.suspend = genphy_suspend,
.resume = rtlgen_resume,
@@ -1046,6 +1070,7 @@ static struct phy_driver realtek_drvs[]
.name = "RTL8226B-CG_RTL8221B-CG 2.5Gbps PHY",
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
+ .probe = rtl822x_probe,
.read_status = rtl822x_read_status,
.suspend = genphy_suspend,
.resume = rtlgen_resume,
@@ -1058,6 +1083,7 @@ static struct phy_driver realtek_drvs[]
.get_features = rtl822x_get_features,
.config_init = rtl8221b_config_init,
.config_aneg = rtl822x_config_aneg,
+ .probe = rtl822x_probe,
.read_status = rtl822x_read_status,
.suspend = genphy_suspend,
.resume = rtlgen_resume,
@@ -1070,6 +1096,7 @@ static struct phy_driver realtek_drvs[]
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
.config_init = rtl8221b_config_init,
+ .probe = rtl822x_probe,
.read_status = rtl822x_read_status,
.suspend = genphy_suspend,
.resume = rtlgen_resume,