net: phy: micrel: Add support for lan8842
The LAN8842 is a low-power, single port triple-speed (10BASE-T/ 100BASE-TX/ 1000BASE-T) ethernet physical layer transceiver (PHY) that supports transmission and reception of data on standard CAT-5, as well as CAT-5e and CAT-6, Unshielded Twisted Pair (UTP) cables. The LAN8842 supports industry-standard SGMII (Serial Gigabit Media Independent Interface) providing chip-to-chip connection to a Gigabit Ethernet MAC using a single serialized link (differential pair) in each direction. There are 2 variants of the lan8842. The one that supports timestamping (lan8842) and one that doesn't have timestamping (lan8832). Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20250818075121.1298170-5-horatiu.vultur@microchip.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>pull/1354/merge
Horatiu Vultur
Paolo Abeni
parent
d471793a9b
commit
5a774b64cd
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@ -448,6 +448,17 @@ struct kszphy_priv {
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struct kszphy_phy_stats phy_stats;
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};
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struct lan8842_phy_stats {
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u64 rx_packets;
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u64 rx_errors;
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u64 tx_packets;
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u64 tx_errors;
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};
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struct lan8842_priv {
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struct lan8842_phy_stats phy_stats;
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};
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static const struct kszphy_type lan8814_type = {
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.led_mode_reg = ~LAN8814_LED_CTRL_1,
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.cable_diag_reg = LAN8814_CABLE_DIAG,
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@ -5768,6 +5779,188 @@ static int ksz9131_resume(struct phy_device *phydev)
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return kszphy_resume(phydev);
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}
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#define LAN8842_SELF_TEST 14 /* 0x0e */
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#define LAN8842_SELF_TEST_RX_CNT_ENA BIT(8)
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#define LAN8842_SELF_TEST_TX_CNT_ENA BIT(4)
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static int lan8842_probe(struct phy_device *phydev)
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{
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struct lan8842_priv *priv;
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int ret;
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priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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phydev->priv = priv;
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/* Similar to lan8814 this PHY has a pin which needs to be pulled down
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* to enable to pass any traffic through it. Therefore use the same
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* function as lan8814
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*/
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ret = lan8814_release_coma_mode(phydev);
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if (ret)
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return ret;
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/* Enable to count the RX and TX packets */
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ret = lanphy_write_page_reg(phydev, LAN8814_PAGE_PCS_DIGITAL,
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LAN8842_SELF_TEST,
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LAN8842_SELF_TEST_RX_CNT_ENA |
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LAN8842_SELF_TEST_TX_CNT_ENA);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int lan8842_config_init(struct phy_device *phydev)
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{
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int ret;
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/* Reset the PHY */
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ret = lanphy_modify_page_reg(phydev, LAN8814_PAGE_COMMON_REGS,
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LAN8814_QSGMII_SOFT_RESET,
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LAN8814_QSGMII_SOFT_RESET_BIT,
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LAN8814_QSGMII_SOFT_RESET_BIT);
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if (ret < 0)
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return ret;
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/* To allow the PHY to control the LEDs the GPIOs of the PHY should have
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* a function mode and not the GPIO. Apparently by default the value is
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* GPIO and not function even though the datasheet it says that it is
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* function. Therefore set this value.
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*/
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return lanphy_write_page_reg(phydev, LAN8814_PAGE_COMMON_REGS,
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LAN8814_GPIO_EN2, 0);
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}
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#define LAN8842_INTR_CTRL_REG 52 /* 0x34 */
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static int lan8842_config_intr(struct phy_device *phydev)
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{
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int err;
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lanphy_write_page_reg(phydev, LAN8814_PAGE_COMMON_REGS,
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LAN8842_INTR_CTRL_REG,
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LAN8814_INTR_CTRL_REG_INTR_ENABLE);
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/* enable / disable interrupts */
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
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err = lan8814_ack_interrupt(phydev);
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if (err)
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return err;
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err = phy_write(phydev, LAN8814_INTC, LAN8814_INT_LINK);
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} else {
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err = phy_write(phydev, LAN8814_INTC, 0);
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if (err)
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return err;
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err = lan8814_ack_interrupt(phydev);
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}
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return err;
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}
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static unsigned int lan8842_inband_caps(struct phy_device *phydev,
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phy_interface_t interface)
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{
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/* Inband configuration can be enabled or disabled using the registers
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* PCS1G_ANEG_CONFIG.
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*/
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return LINK_INBAND_DISABLE | LINK_INBAND_ENABLE;
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}
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static int lan8842_config_inband(struct phy_device *phydev, unsigned int modes)
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{
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bool enable;
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if (modes == LINK_INBAND_DISABLE)
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enable = false;
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else
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enable = true;
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/* Disable or enable in-band autoneg with PCS Host side
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* It has the same address as lan8814
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*/
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return lanphy_modify_page_reg(phydev, LAN8814_PAGE_PORT_REGS,
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LAN8814_QSGMII_PCS1G_ANEG_CONFIG,
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LAN8814_QSGMII_PCS1G_ANEG_CONFIG_ANEG_ENA,
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enable ? LAN8814_QSGMII_PCS1G_ANEG_CONFIG_ANEG_ENA : 0);
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}
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static irqreturn_t lan8842_handle_interrupt(struct phy_device *phydev)
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{
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int ret = IRQ_NONE;
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int irq_status;
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irq_status = phy_read(phydev, LAN8814_INTS);
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if (irq_status < 0) {
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phy_error(phydev);
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return IRQ_NONE;
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}
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if (irq_status & LAN8814_INT_LINK) {
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phy_trigger_machine(phydev);
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ret = IRQ_HANDLED;
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}
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return ret;
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}
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static u64 lan8842_get_stat(struct phy_device *phydev, int count, int *regs)
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{
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u64 ret = 0;
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int val;
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for (int j = 0; j < count; ++j) {
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val = lanphy_read_page_reg(phydev, LAN8814_PAGE_PCS_DIGITAL,
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regs[j]);
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if (val < 0)
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return U64_MAX;
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ret <<= 16;
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ret += val;
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}
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return ret;
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}
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static int lan8842_update_stats(struct phy_device *phydev)
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{
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struct lan8842_priv *priv = phydev->priv;
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int rx_packets_regs[] = {88, 61, 60};
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int rx_errors_regs[] = {63, 62};
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int tx_packets_regs[] = {89, 85, 84};
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int tx_errors_regs[] = {87, 86};
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priv->phy_stats.rx_packets = lan8842_get_stat(phydev,
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ARRAY_SIZE(rx_packets_regs),
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rx_packets_regs);
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priv->phy_stats.rx_errors = lan8842_get_stat(phydev,
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ARRAY_SIZE(rx_errors_regs),
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rx_errors_regs);
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priv->phy_stats.tx_packets = lan8842_get_stat(phydev,
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ARRAY_SIZE(tx_packets_regs),
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tx_packets_regs);
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priv->phy_stats.tx_errors = lan8842_get_stat(phydev,
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ARRAY_SIZE(tx_errors_regs),
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tx_errors_regs);
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return 0;
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}
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static void lan8842_get_phy_stats(struct phy_device *phydev,
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struct ethtool_eth_phy_stats *eth_stats,
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struct ethtool_phy_stats *stats)
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{
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struct lan8842_priv *priv = phydev->priv;
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stats->rx_packets = priv->phy_stats.rx_packets;
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stats->rx_errors = priv->phy_stats.rx_errors;
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stats->tx_packets = priv->phy_stats.tx_packets;
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stats->tx_errors = priv->phy_stats.tx_errors;
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}
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static struct phy_driver ksphy_driver[] = {
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{
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PHY_ID_MATCH_MODEL(PHY_ID_KS8737),
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@ -5987,6 +6180,21 @@ static struct phy_driver ksphy_driver[] = {
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.resume = lan8841_resume,
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.cable_test_start = lan8814_cable_test_start,
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.cable_test_get_status = ksz886x_cable_test_get_status,
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}, {
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PHY_ID_MATCH_MODEL(PHY_ID_LAN8842),
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.name = "Microchip LAN8842 Gigabit PHY",
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.flags = PHY_POLL_CABLE_TEST,
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.driver_data = &lan8814_type,
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.probe = lan8842_probe,
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.config_init = lan8842_config_init,
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.config_intr = lan8842_config_intr,
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.inband_caps = lan8842_inband_caps,
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.config_inband = lan8842_config_inband,
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.handle_interrupt = lan8842_handle_interrupt,
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.get_phy_stats = lan8842_get_phy_stats,
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.update_stats = lan8842_update_stats,
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.cable_test_start = lan8814_cable_test_start,
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.cable_test_get_status = ksz886x_cable_test_get_status,
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}, {
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PHY_ID_MATCH_MODEL(PHY_ID_KSZ9131),
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.name = "Microchip KSZ9131 Gigabit PHY",
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@ -6082,6 +6290,7 @@ static const struct mdio_device_id __maybe_unused micrel_tbl[] = {
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{ PHY_ID_MATCH_MODEL(PHY_ID_LAN8814) },
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{ PHY_ID_MATCH_MODEL(PHY_ID_LAN8804) },
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{ PHY_ID_MATCH_MODEL(PHY_ID_LAN8841) },
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{ PHY_ID_MATCH_MODEL(PHY_ID_LAN8842) },
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{ }
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};
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@ -32,6 +32,7 @@
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#define PHY_ID_LAN8814 0x00221660
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#define PHY_ID_LAN8804 0x00221670
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#define PHY_ID_LAN8841 0x00221650
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#define PHY_ID_LAN8842 0x002216C0
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#define PHY_ID_KSZ886X 0x00221430
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#define PHY_ID_KSZ8863 0x00221435
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