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net: phy: realtek: implement configuring in-band an 

Implement the inband_caps() and config_inband() PHY driver methods to
allow configuring the use of in-band-status with SGMII and 2500Base-X on
RTL8226 and RTL8221B 2.5GE PHYs.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/82a78a06d67be19e856d646cf880b2021ea9d837.1767630451.git.daniel@makrotopia.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Daniel Golle 2026-01-05 16:38:12 +00:00 committed by Paolo Abeni
parent 50326b48f0
commit 10fbd71fc5
1 changed files with 67 additions and 0 deletions
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67
drivers/net/phy/realtek/realtek_main.c
View File

@ -131,6 +131,15 @@
#define RTL822X_VND1_SERDES_CTRL3_MODE_SGMII 0x02
#define RTL822X_VND1_SERDES_CTRL3_MODE_2500BASEX 0x16
#define RTL822X_VND1_SERDES_CMD 0x7587
#define RTL822X_VND1_SERDES_CMD_WRITE BIT(1)
#define RTL822X_VND1_SERDES_CMD_BUSY BIT(0)
#define RTL822X_VND1_SERDES_ADDR 0x7588
#define RTL822X_VND1_SERDES_ADDR_AUTONEG 0x2
#define RTL822X_VND1_SERDES_INBAND_DISABLE 0x71d0
#define RTL822X_VND1_SERDES_INBAND_ENABLE 0x70d0
#define RTL822X_VND1_SERDES_DATA 0x7589
/* RTL822X_VND2_XXXXX registers are only accessible when phydev->is_c45
* is set, they cannot be accessed by C45-over-C22.
*/
@ -1308,6 +1317,50 @@ static int rtl822xb_config_init(struct phy_device *phydev)
return rtl822x_set_serdes_option_mode(phydev, false);
}
static int rtl822x_serdes_write(struct phy_device *phydev, u16 reg, u16 val)
{
int ret, poll;
ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, RTL822X_VND1_SERDES_ADDR, reg);
if (ret < 0)
return ret;
ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, RTL822X_VND1_SERDES_DATA, val);
if (ret < 0)
return ret;
ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, RTL822X_VND1_SERDES_CMD,
RTL822X_VND1_SERDES_CMD_WRITE |
RTL822X_VND1_SERDES_CMD_BUSY);
if (ret < 0)
return ret;
return phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND1,
RTL822X_VND1_SERDES_CMD, poll,
!(poll & RTL822X_VND1_SERDES_CMD_BUSY),
500, 100000, false);
}
static int rtl822x_config_inband(struct phy_device *phydev, unsigned int modes)
{
return rtl822x_serdes_write(phydev, RTL822X_VND1_SERDES_ADDR_AUTONEG,
(modes != LINK_INBAND_DISABLE) ?
RTL822X_VND1_SERDES_INBAND_ENABLE :
RTL822X_VND1_SERDES_INBAND_DISABLE);
}
static unsigned int rtl822x_inband_caps(struct phy_device *phydev,
phy_interface_t interface)
{
switch (interface) {
case PHY_INTERFACE_MODE_2500BASEX:
case PHY_INTERFACE_MODE_SGMII:
return LINK_INBAND_DISABLE | LINK_INBAND_ENABLE;
default:
return 0;
}
}
static int rtl822xb_get_rate_matching(struct phy_device *phydev,
phy_interface_t iface)
{
@ -2103,6 +2156,8 @@ static struct phy_driver realtek_drvs[] = {
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
.config_init = rtl822xb_config_init,
.inband_caps = rtl822x_inband_caps,
.config_inband = rtl822x_config_inband,
.get_rate_matching = rtl822xb_get_rate_matching,
.read_status = rtl822xb_read_status,
.suspend = genphy_suspend,
@ -2116,6 +2171,8 @@ static struct phy_driver realtek_drvs[] = {
.get_features = rtl822x_c45_get_features,
.config_aneg = rtl822x_c45_config_aneg,
.config_init = rtl822x_config_init,
.inband_caps = rtl822x_inband_caps,
.config_inband = rtl822x_config_inband,
.read_status = rtl822xb_c45_read_status,
.suspend = genphy_c45_pma_suspend,
.resume = rtlgen_c45_resume,
@ -2125,6 +2182,8 @@ static struct phy_driver realtek_drvs[] = {
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
.config_init = rtl822xb_config_init,
.inband_caps = rtl822x_inband_caps,
.config_inband = rtl822x_config_inband,
.get_rate_matching = rtl822xb_get_rate_matching,
.read_status = rtl822xb_read_status,
.suspend = genphy_suspend,
@ -2138,6 +2197,8 @@ static struct phy_driver realtek_drvs[] = {
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
.config_init = rtl822xb_config_init,
.inband_caps = rtl822x_inband_caps,
.config_inband = rtl822x_config_inband,
.get_rate_matching = rtl822xb_get_rate_matching,
.read_status = rtl822xb_read_status,
.suspend = genphy_suspend,
@ -2151,6 +2212,8 @@ static struct phy_driver realtek_drvs[] = {
.handle_interrupt = rtl8221b_handle_interrupt,
.probe = rtl822x_probe,
.config_init = rtl822xb_config_init,
.inband_caps = rtl822x_inband_caps,
.config_inband = rtl822x_config_inband,
.get_rate_matching = rtl822xb_get_rate_matching,
.get_features = rtl822x_c45_get_features,
.config_aneg = rtl822x_c45_config_aneg,
@ -2164,6 +2227,8 @@ static struct phy_driver realtek_drvs[] = {
.get_features = rtl822x_get_features,
.config_aneg = rtl822x_config_aneg,
.config_init = rtl822xb_config_init,
.inband_caps = rtl822x_inband_caps,
.config_inband = rtl822x_config_inband,
.get_rate_matching = rtl822xb_get_rate_matching,
.read_status = rtl822xb_read_status,
.suspend = genphy_suspend,
@ -2177,6 +2242,8 @@ static struct phy_driver realtek_drvs[] = {
.handle_interrupt = rtl8221b_handle_interrupt,
.probe = rtl822x_probe,
.config_init = rtl822xb_config_init,
.inband_caps = rtl822x_inband_caps,
.config_inband = rtl822x_config_inband,
.get_rate_matching = rtl822xb_get_rate_matching,
.get_features = rtl822x_c45_get_features,
.config_aneg = rtl822x_c45_config_aneg,