[PATCH net-next 8/8] net: mdio: realtek-rtl9300: Add support for RTL839x
From: Markus Stockhausen <hidden>
Date: 2026-06-13 11:30:27
Also in:
linux-devicetree
Subsystem:
ethernet phy library, networking drivers, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
The MDIO driver has been prepared for multiple device support. Add all required bits for the RTL839x (aka cypress) series. This is straightforward but some things are worth mentioning. - The device has a lot in common with the RTL931x series. 8192 (Realtek) pages and 7 MMIO registers - There are two SMI buses for 1G PHYs. Neither the bus nor address map register exists. - The MAC layer shows link flapping when temporarily deactivating the hardware polling for one port. Mark this in the info structure. - The hardware has not much to configure. So the setup_controller() function is not needed. Signed-off-by: Markus Stockhausen <redacted> --- drivers/net/mdio/mdio-realtek-rtl9300.c | 104 ++++++++++++++++++++++++ 1 file changed, 104 insertions(+)
diff --git a/drivers/net/mdio/mdio-realtek-rtl9300.c b/drivers/net/mdio/mdio-realtek-rtl9300.c
index d9ff0b0aecbb..2ab1aeb85eed 100644
--- a/drivers/net/mdio/mdio-realtek-rtl9300.c
+++ b/drivers/net/mdio/mdio-realtek-rtl9300.c@@ -139,6 +139,29 @@ #define RTL8380_SMI_POLL_CTRL 0xa17c #define RTL8380_SMI_PORT0_5_ADDR_CTRL 0xa1c8 +#define RTL8390_NUM_BUSES 2 +#define RTL8390_NUM_PAGES 8192 +#define RTL8390_NUM_PORTS 52 +#define RTL8390_BCAST_PHYID_CTRL 0x03ec +#define RTL8390_PHYREG_ACCESS_CTRL 0x03dc +#define RTL8390_PHY_CTRL_REG_ADDR GENMASK(9, 5) +#define RTL8390_PHY_CTRL_PARK_PAGE GENMASK(27, 23) +#define RTL8390_PHY_CTRL_MAIN_PAGE GENMASK(22, 10) +#define RTL8390_PHY_CTRL_FAIL BIT(1) +#define RTL8390_PHY_CTRL_WRITE BIT(3) +#define RTL8390_PHY_CTRL_READ 0 +#define RTL8390_PHY_CTRL_TYPE_C45 BIT(2) +#define RTL8390_PHY_CTRL_TYPE_C22 0 +#define RTL8390_PHYREG_CTRL 0x03e0 +#define RTL8390_PHY_CTRL_EXT_PAGE GENMASK(8, 0) +#define RTL8390_PHYREG_DATA_CTRL 0x03f0 +#define RTL8390_PHY_CTRL_INDATA GENMASK(31, 16) +#define RTL8390_PHY_CTRL_DATA GENMASK(15, 0) +#define RTL8390_PHYREG_MMD_CTRL 0x03f4 +#define RTL8390_PHYREG_PORT_CTRL_LOW 0x03e4 +#define RTL8390_PHYREG_PORT_CTRL_HIGH 0x03e8 +#define RTL8390_SMI_PORT_POLLING_CTRL 0x03fc + #define RTL9300_NUM_BUSES 4 #define RTL9300_NUM_PAGES 4096 #define RTL9300_NUM_PORTS 28
@@ -457,6 +480,62 @@ static int otto_emdio_8380_write_c45(struct mii_bus *bus, int port, return otto_emdio_write_cmd(bus, RTL8380_PHY_CTRL_TYPE_C45, &cmd_data); } +static int otto_emdio_8390_read_c22(struct mii_bus *bus, int port, int regnum, u32 *value) +{ + struct otto_emdio_priv *priv = otto_emdio_bus_to_priv(bus); + struct otto_emdio_cmd_regs cmd_data = { + .c22_data = FIELD_PREP(RTL8390_PHY_CTRL_REG_ADDR, regnum) | + FIELD_PREP(RTL8390_PHY_CTRL_MAIN_PAGE, priv->page[port]), + .ext_page = FIELD_PREP(RTL8390_PHY_CTRL_EXT_PAGE, 0x1ff), + .io_data = FIELD_PREP(RTL8390_PHY_CTRL_INDATA, port), + }; + + return otto_emdio_read_cmd(bus, RTL8390_PHY_CTRL_TYPE_C22, &cmd_data, + RTL8390_PHY_CTRL_DATA, value); +} + +static int otto_emdio_8390_write_c22(struct mii_bus *bus, int port, int regnum, u16 value) +{ + struct otto_emdio_priv *priv = otto_emdio_bus_to_priv(bus); + struct otto_emdio_cmd_regs cmd_data = { + .c22_data = FIELD_PREP(RTL8390_PHY_CTRL_REG_ADDR, regnum) | + FIELD_PREP(RTL8390_PHY_CTRL_MAIN_PAGE, priv->page[port]), + .ext_page = FIELD_PREP(RTL8390_PHY_CTRL_EXT_PAGE, 0x1ff), + .io_data = FIELD_PREP(RTL8390_PHY_CTRL_INDATA, value), + .port_mask_high = (u32)(BIT_ULL(port) >> 32), + .port_mask_low = (u32)(BIT_ULL(port)), + }; + + return otto_emdio_write_cmd(bus, RTL8390_PHY_CTRL_TYPE_C22, &cmd_data); +} + +static int otto_emdio_8390_read_c45(struct mii_bus *bus, int port, + int dev_addr, int regnum, u32 *value) +{ + struct otto_emdio_cmd_regs cmd_data = { + .c45_data = FIELD_PREP(PHY_CTRL_MMD_DEVAD, dev_addr) | + FIELD_PREP(PHY_CTRL_MMD_REG, regnum), + .io_data = FIELD_PREP(RTL8390_PHY_CTRL_INDATA, port), + }; + + return otto_emdio_read_cmd(bus, RTL8390_PHY_CTRL_TYPE_C45, &cmd_data, + RTL8390_PHY_CTRL_DATA, value); +} + +static int otto_emdio_8390_write_c45(struct mii_bus *bus, int port, + int dev_addr, int regnum, u16 value) +{ + struct otto_emdio_cmd_regs cmd_data = { + .c45_data = FIELD_PREP(PHY_CTRL_MMD_DEVAD, dev_addr) | + FIELD_PREP(PHY_CTRL_MMD_REG, regnum), + .io_data = FIELD_PREP(RTL8390_PHY_CTRL_INDATA, value), + .port_mask_high = (u32)(BIT_ULL(port) >> 32), + .port_mask_low = (u32)(BIT_ULL(port)), + }; + + return otto_emdio_write_cmd(bus, RTL8390_PHY_CTRL_TYPE_C45, &cmd_data); +} + static int otto_emdio_9300_read_c22(struct mii_bus *bus, int port, int regnum, u32 *value) { struct otto_emdio_priv *priv = otto_emdio_bus_to_priv(bus);
@@ -963,6 +1042,30 @@ static const struct otto_emdio_info otto_emdio_8380_info = { .write_c45 = otto_emdio_8380_write_c45, }; +static const struct otto_emdio_info otto_emdio_8390_info = { + .cmd_fail = RTL8390_PHY_CTRL_FAIL, + .cmd_read = RTL8390_PHY_CTRL_READ, + .cmd_write = RTL8390_PHY_CTRL_WRITE, + .cmd_regs = { + .broadcast = RTL8390_BCAST_PHYID_CTRL, + .c22_data = RTL8390_PHYREG_ACCESS_CTRL, + .c45_data = RTL8390_PHYREG_MMD_CTRL, + .ext_page = RTL8390_PHYREG_CTRL, + .io_data = RTL8390_PHYREG_DATA_CTRL, + .port_mask_low = RTL8390_PHYREG_PORT_CTRL_LOW, + .port_mask_high = RTL8390_PHYREG_PORT_CTRL_HIGH, + }, + .link_flap = true, + .num_buses = RTL8390_NUM_BUSES, + .num_pages = RTL8390_NUM_PAGES, + .num_ports = RTL8390_NUM_PORTS, + .poll_ctrl = RTL8390_SMI_PORT_POLLING_CTRL, + .read_c22 = otto_emdio_8390_read_c22, + .read_c45 = otto_emdio_8390_read_c45, + .write_c22 = otto_emdio_8390_write_c22, + .write_c45 = otto_emdio_8390_write_c45, +}; + static const struct otto_emdio_info otto_emdio_9300_info = { .addr_map_base = RTL9300_SMI_PORT0_5_ADDR_CTRL, .bus_map_base = RTL9300_SMI_PORT0_15_POLLING_SEL,
@@ -1014,6 +1117,7 @@ static const struct otto_emdio_info otto_emdio_9310_info = { static const struct of_device_id otto_emdio_ids[] = { { .compatible = "realtek,rtl8380-mdio", .data = &otto_emdio_8380_info }, + { .compatible = "realtek,rtl8391-mdio", .data = &otto_emdio_8390_info }, { .compatible = "realtek,rtl9301-mdio", .data = &otto_emdio_9300_info }, { .compatible = "realtek,rtl9311-mdio", .data = &otto_emdio_9310_info }, {}
--
2.54.0