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realtek: refactor RTL838x mdio serdes read/write functions

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There are still a lot of mdio functions scattered around the code.
Move the RTL838x serdes helpers closer to the bus, add the proper
prefix and simplify the functions.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/18847
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Markus Stockhausen 2025-05-19 14:34:54 -04:00 committed by Robert Marko
parent 1bef83bb23
commit 32f408c955
2 changed files with 22 additions and 25 deletions
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31
target/linux/realtek/files-6.6/drivers/net/ethernet/rtl838x_eth.c
View file

@ -205,7 +205,6 @@ struct rtl838x_eth_priv {
};
extern int rtl838x_phy_init(struct rtl838x_eth_priv *priv);
extern int rtl838x_read_sds_phy(int phy_addr, int phy_reg);
extern int rtl839x_read_sds_phy(int phy_addr, int phy_reg);
extern int rtl839x_write_sds_phy(int phy_addr, int phy_reg, u16 v);
extern int rtl930x_read_sds_phy(int phy_addr, int page, int phy_reg);
@ -1790,6 +1789,24 @@ int phy_port_read_paged(struct phy_device *phydev, int port, int page, u32 regnu
return rtmdio_access(phydev, RTMDIO_READ | RTMDIO_ABS, port, page, regnum, 0);
}
/* SerDes reader/writer functions for the ports without external phy. */
int rtmdio_838x_read_sds(int addr, int regnum)
{
int offset = addr == 26 ? 0x100 : 0x0;
return sw_r32(RTL838X_SDS4_FIB_REG0 + offset + (regnum << 2)) & 0xffff;
}
int rtmdio_838x_write_sds(int addr, int regnum, u16 val)
{
int offset = addr == 26 ? 0x100 : 0x0;
sw_w32(val, RTL838X_SDS4_FIB_REG0 + offset + (regnum << 2));
return 0;
}
/* These are the core functions of our new Realtek SoC MDIO bus. */
static int rtmdio_read_c45(struct mii_bus *bus, int addr, int devnum, int regnum)
@ -1821,7 +1838,7 @@ static int rtmdio_83xx_read(struct mii_bus *bus, int addr, int regnum)
return -ENODEV;
if (addr >= 24 && addr <= 27 && priv->id == 0x8380)
return rtl838x_read_sds_phy(addr, regnum);
return rtmdio_838x_read_sds(addr, regnum);
if (priv->family_id == RTL8390_FAMILY_ID && priv->phy_is_internal[addr])
return rtl839x_read_sds_phy(addr, regnum);
@ -1886,7 +1903,7 @@ static int rtmdio_write_c45(struct mii_bus *bus, int addr, int devnum, int regnu
static int rtmdio_83xx_write(struct mii_bus *bus, int addr, int regnum, u16 val)
{
struct rtmdio_bus_priv *priv = bus->priv;
int err, page, offset = 0;
int err, page;
if (regnum == RTMDIO_PORT_SELECT) {
priv->extaddr = (s16)val;
@ -1901,12 +1918,8 @@ static int rtmdio_83xx_write(struct mii_bus *bus, int addr, int regnum, u16 val)
page = priv->page[addr];
if (addr >= 24 && addr <= 27 && priv->id == 0x8380) {
if (addr == 26)
offset = 0x100;
sw_w32(val, RTL838X_SDS4_FIB_REG0 + offset + (regnum << 2));
return 0;
}
if (addr >= 24 && addr <= 27 && priv->id == 0x8380)
return rtmdio_838x_write_sds(addr, regnum, val);
if (priv->family_id == RTL8390_FAMILY_ID && priv->phy_is_internal[addr])
return rtl839x_write_sds_phy(addr, regnum, val);

16
target/linux/realtek/files-6.6/drivers/net/phy/rtl83xx-phy.c
View file

@ -422,22 +422,6 @@ int rtl931x_write_sds_phy(int phy_addr, int page, int phy_reg, u16 v)
return 0;
}
/* On the RTL838x SoCs, the internal SerDes is accessed through direct access to
* standard PHY registers, where a 32 bit register holds a 16 bit word as found
* in a standard page 0 of a PHY
*/
int rtl838x_read_sds_phy(int phy_addr, int phy_reg)
{
int offset = 0;
u32 val;
if (phy_addr == 26)
offset = 0x100;
val = sw_r32(RTL838X_SDS4_FIB_REG0 + offset + (phy_reg << 2)) & 0xffff;
return val;
}
int rtl839x_write_sds_phy(int phy_addr, int phy_reg, u16 v)
{
int offset = 0;