diff options
Diffstat (limited to 'drivers/net/dsa/microchip/lan937x_main.c')
| -rw-r--r-- | drivers/net/dsa/microchip/lan937x_main.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c index d86ffdf976b0..797fe7f62394 100644 --- a/drivers/net/dsa/microchip/lan937x_main.c +++ b/drivers/net/dsa/microchip/lan937x_main.c @@ -315,6 +315,45 @@ int lan937x_change_mtu(struct ksz_device *dev, int port, int new_mtu) return 0; } +static void lan937x_set_tune_adj(struct ksz_device *dev, int port, + u16 reg, u8 val) +{ + u16 data16; + + ksz_pread16(dev, port, reg, &data16); + + /* Update tune Adjust */ + data16 |= FIELD_PREP(PORT_TUNE_ADJ, val); + ksz_pwrite16(dev, port, reg, data16); + + /* write DLL reset to take effect */ + data16 |= PORT_DLL_RESET; + ksz_pwrite16(dev, port, reg, data16); +} + +static void lan937x_set_rgmii_tx_delay(struct ksz_device *dev, int port) +{ + u8 val; + + /* Apply different codes based on the ports as per characterization + * results + */ + val = (port == LAN937X_RGMII_1_PORT) ? RGMII_1_TX_DELAY_2NS : + RGMII_2_TX_DELAY_2NS; + + lan937x_set_tune_adj(dev, port, REG_PORT_XMII_CTRL_5, val); +} + +static void lan937x_set_rgmii_rx_delay(struct ksz_device *dev, int port) +{ + u8 val; + + val = (port == LAN937X_RGMII_1_PORT) ? RGMII_1_RX_DELAY_2NS : + RGMII_2_RX_DELAY_2NS; + + lan937x_set_tune_adj(dev, port, REG_PORT_XMII_CTRL_4, val); +} + void lan937x_phylink_get_caps(struct ksz_device *dev, int port, struct phylink_config *config) { @@ -327,6 +366,23 @@ void lan937x_phylink_get_caps(struct ksz_device *dev, int port, } } +void lan937x_setup_rgmii_delay(struct ksz_device *dev, int port) +{ + struct ksz_port *p = &dev->ports[port]; + + if (p->rgmii_tx_val) { + lan937x_set_rgmii_tx_delay(dev, port); + dev_info(dev->dev, "Applied rgmii tx delay for the port %d\n", + port); + } + + if (p->rgmii_rx_val) { + lan937x_set_rgmii_rx_delay(dev, port); + dev_info(dev->dev, "Applied rgmii rx delay for the port %d\n", + port); + } +} + void lan937x_phylink_mac_config(struct ksz_device *dev, int port, unsigned int mode, const struct phylink_link_state *state) |