@@ -14979,6 +14979,12 @@ L: netdev@vger.kernel.org
S: Maintained
F: drivers/net/ethernet/microchip/lan743x_*
+MICROCHIP LAN8650/1 10BASE-T1S MACPHY ETHERNET DRIVER
+M: Parthiban Veerasooran <parthiban.veerasooran@microchip.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/microchip/lan865x/lan865x.c
+
MICROCHIP LAN87xx/LAN937x T1 PHY DRIVER
M: Arun Ramadoss <arun.ramadoss@microchip.com>
R: UNGLinuxDriver@microchip.com
@@ -56,6 +56,7 @@ config LAN743X
To compile this driver as a module, choose M here. The module will be
called lan743x.
+source "drivers/net/ethernet/microchip/lan865x/Kconfig"
source "drivers/net/ethernet/microchip/lan966x/Kconfig"
source "drivers/net/ethernet/microchip/sparx5/Kconfig"
source "drivers/net/ethernet/microchip/vcap/Kconfig"
@@ -9,6 +9,7 @@ obj-$(CONFIG_LAN743X) += lan743x.o
lan743x-objs := lan743x_main.o lan743x_ethtool.o lan743x_ptp.o
+obj-$(CONFIG_LAN865X) += lan865x/
obj-$(CONFIG_LAN966X_SWITCH) += lan966x/
obj-$(CONFIG_SPARX5_SWITCH) += sparx5/
obj-$(CONFIG_VCAP) += vcap/
new file mode 100644
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Microchip LAN865x Driver Support
+#
+
+if NET_VENDOR_MICROCHIP
+
+config LAN865X
+ tristate "LAN865x support"
+ depends on SPI
+ select OA_TC6
+ help
+ Support for the Microchip LAN8650/1 Rev.B0/B1 MACPHY Ethernet chip. It
+ uses OPEN Alliance 10BASE-T1x Serial Interface specification.
+
+ To compile this driver as a module, choose M here. The module will be
+ called lan865x.
+
+endif # NET_VENDOR_MICROCHIP
new file mode 100644
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Microchip LAN865x Driver
+#
+
+obj-$(CONFIG_LAN865X) += lan865x.o
new file mode 100644
@@ -0,0 +1,429 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Microchip's LAN865x 10BASE-T1S MAC-PHY driver
+ *
+ * Author: Parthiban Veerasooran <parthiban.veerasooran@microchip.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/phy.h>
+#include <linux/oa_tc6.h>
+
+#define DRV_NAME "lan8650"
+
+/* MAC Network Control Register */
+#define LAN865X_REG_MAC_NET_CTL 0x00010000
+#define MAC_NET_CTL_TXEN BIT(3) /* Transmit Enable */
+#define MAC_NET_CTL_RXEN BIT(2) /* Receive Enable */
+
+/* MAC Network Configuration Reg */
+#define LAN865X_REG_MAC_NET_CFG 0x00010001
+#define MAC_NET_CFG_PROMISCUOUS_MODE BIT(4)
+#define MAC_NET_CFG_MULTICAST_MODE BIT(6)
+#define MAC_NET_CFG_UNICAST_MODE BIT(7)
+
+/* MAC Hash Register Bottom */
+#define LAN865X_REG_MAC_L_HASH 0x00010020
+/* MAC Hash Register Top */
+#define LAN865X_REG_MAC_H_HASH 0x00010021
+/* MAC Specific Addr 1 Bottom Reg */
+#define LAN865X_REG_MAC_L_SADDR1 0x00010022
+/* MAC Specific Addr 1 Top Reg */
+#define LAN865X_REG_MAC_H_SADDR1 0x00010023
+
+struct lan865x_priv {
+ struct work_struct multicast_work;
+ struct net_device *netdev;
+ struct spi_device *spi;
+ struct oa_tc6 *tc6;
+};
+
+static int lan865x_set_hw_macaddr_low_bytes(struct oa_tc6 *tc6, const u8 *mac)
+{
+ u32 regval;
+
+ regval = (mac[3] << 24) | (mac[2] << 16) | (mac[1] << 8) | mac[0];
+
+ return oa_tc6_write_register(tc6, LAN865X_REG_MAC_L_SADDR1, regval);
+}
+
+static int lan865x_set_hw_macaddr(struct lan865x_priv *priv, const u8 *mac)
+{
+ int restore_ret;
+ u32 regval;
+ int ret;
+
+ /* Configure MAC address low bytes */
+ ret = lan865x_set_hw_macaddr_low_bytes(priv->tc6, mac);
+ if (ret)
+ return ret;
+
+ /* Prepare and configure MAC address high bytes */
+ regval = (mac[5] << 8) | mac[4];
+ ret = oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_H_SADDR1,
+ regval);
+ if (!ret)
+ return 0;
+
+ /* Restore the old MAC address low bytes from netdev if the new MAC
+ * address high bytes setting failed.
+ */
+ restore_ret = lan865x_set_hw_macaddr_low_bytes(priv->tc6,
+ priv->netdev->dev_addr);
+ if (restore_ret)
+ return restore_ret;
+
+ return ret;
+}
+
+static const struct ethtool_ops lan865x_ethtool_ops = {
+ .get_link_ksettings = phy_ethtool_get_link_ksettings,
+ .set_link_ksettings = phy_ethtool_set_link_ksettings,
+};
+
+static int lan865x_set_mac_address(struct net_device *netdev, void *addr)
+{
+ struct lan865x_priv *priv = netdev_priv(netdev);
+ struct sockaddr *address = addr;
+ int ret;
+
+ ret = eth_prepare_mac_addr_change(netdev, addr);
+ if (ret < 0)
+ return ret;
+
+ if (ether_addr_equal(address->sa_data, netdev->dev_addr))
+ return 0;
+
+ ret = lan865x_set_hw_macaddr(priv, address->sa_data);
+ if (ret)
+ return ret;
+
+ eth_commit_mac_addr_change(netdev, addr);
+
+ return 0;
+}
+
+static u32 get_address_bit(u8 addr[ETH_ALEN], u32 bit)
+{
+ return ((addr[bit / 8]) >> (bit % 8)) & 1;
+}
+
+static u32 lan865x_hash(u8 addr[ETH_ALEN])
+{
+ u32 hash_index = 0;
+
+ for (int i = 0; i < 6; i++) {
+ u32 hash = 0;
+
+ for (int j = 0; j < 8; j++)
+ hash ^= get_address_bit(addr, (j * 6) + i);
+
+ hash_index |= (hash << i);
+ }
+
+ return hash_index;
+}
+
+static int lan865x_set_specific_multicast_addr(struct lan865x_priv *priv)
+{
+ struct netdev_hw_addr *ha;
+ u32 hash_lo = 0;
+ u32 hash_hi = 0;
+ int ret;
+
+ netdev_for_each_mc_addr(ha, priv->netdev) {
+ u32 bit_num = lan865x_hash(ha->addr);
+
+ if (bit_num >= BIT(5))
+ hash_hi |= (1 << (bit_num - BIT(5)));
+ else
+ hash_lo |= (1 << bit_num);
+ }
+
+ /* Enabling specific multicast addresses */
+ ret = oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_H_HASH, hash_hi);
+ if (ret) {
+ netdev_err(priv->netdev, "Failed to write reg_hashh: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_L_HASH, hash_lo);
+ if (ret)
+ netdev_err(priv->netdev, "Failed to write reg_hashl: %d\n",
+ ret);
+
+ return ret;
+}
+
+static int lan865x_set_all_multicast_addr(struct lan865x_priv *priv)
+{
+ int ret;
+
+ /* Enabling all multicast addresses */
+ ret = oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_H_HASH,
+ 0xffffffff);
+ if (ret) {
+ netdev_err(priv->netdev, "Failed to write reg_hashh: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_L_HASH,
+ 0xffffffff);
+ if (ret)
+ netdev_err(priv->netdev, "Failed to write reg_hashl: %d\n",
+ ret);
+
+ return ret;
+}
+
+static int lan865x_clear_all_multicast_addr(struct lan865x_priv *priv)
+{
+ int ret;
+
+ ret = oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_H_HASH, 0);
+ if (ret) {
+ netdev_err(priv->netdev, "Failed to write reg_hashh: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_L_HASH, 0);
+ if (ret)
+ netdev_err(priv->netdev, "Failed to write reg_hashl: %d\n",
+ ret);
+
+ return ret;
+}
+
+static void lan865x_multicast_work_handler(struct work_struct *work)
+{
+ struct lan865x_priv *priv = container_of(work, struct lan865x_priv,
+ multicast_work);
+ u32 regval = 0;
+ int ret;
+
+ if (priv->netdev->flags & IFF_PROMISC) {
+ /* Enabling promiscuous mode */
+ regval |= MAC_NET_CFG_PROMISCUOUS_MODE;
+ regval &= (~MAC_NET_CFG_MULTICAST_MODE);
+ regval &= (~MAC_NET_CFG_UNICAST_MODE);
+ } else if (priv->netdev->flags & IFF_ALLMULTI) {
+ /* Enabling all multicast mode */
+ if (lan865x_set_all_multicast_addr(priv))
+ return;
+
+ regval &= (~MAC_NET_CFG_PROMISCUOUS_MODE);
+ regval |= MAC_NET_CFG_MULTICAST_MODE;
+ regval &= (~MAC_NET_CFG_UNICAST_MODE);
+ } else if (!netdev_mc_empty(priv->netdev)) {
+ /* Enabling specific multicast mode */
+ if (lan865x_set_specific_multicast_addr(priv))
+ return;
+
+ regval &= (~MAC_NET_CFG_PROMISCUOUS_MODE);
+ regval |= MAC_NET_CFG_MULTICAST_MODE;
+ regval &= (~MAC_NET_CFG_UNICAST_MODE);
+ } else {
+ /* Enabling local mac address only */
+ if (lan865x_clear_all_multicast_addr(priv))
+ return;
+ }
+ ret = oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_NET_CFG, regval);
+ if (ret)
+ netdev_err(priv->netdev, "Failed to enable promiscuous/multicast/normal mode: %d\n",
+ ret);
+}
+
+static void lan865x_set_multicast_list(struct net_device *netdev)
+{
+ struct lan865x_priv *priv = netdev_priv(netdev);
+
+ schedule_work(&priv->multicast_work);
+}
+
+static netdev_tx_t lan865x_send_packet(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ struct lan865x_priv *priv = netdev_priv(netdev);
+
+ return oa_tc6_start_xmit(priv->tc6, skb);
+}
+
+static int lan865x_hw_disable(struct lan865x_priv *priv)
+{
+ u32 regval;
+
+ if (oa_tc6_read_register(priv->tc6, LAN865X_REG_MAC_NET_CTL, ®val))
+ return -ENODEV;
+
+ regval &= ~(MAC_NET_CTL_TXEN | MAC_NET_CTL_RXEN);
+
+ if (oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_NET_CTL, regval))
+ return -ENODEV;
+
+ return 0;
+}
+
+static int lan865x_net_close(struct net_device *netdev)
+{
+ struct lan865x_priv *priv = netdev_priv(netdev);
+ int ret;
+
+ netif_stop_queue(netdev);
+ phy_stop(netdev->phydev);
+ ret = lan865x_hw_disable(priv);
+ if (ret) {
+ netdev_err(netdev, "Failed to disable the hardware: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lan865x_hw_enable(struct lan865x_priv *priv)
+{
+ u32 regval;
+
+ if (oa_tc6_read_register(priv->tc6, LAN865X_REG_MAC_NET_CTL, ®val))
+ return -ENODEV;
+
+ regval |= MAC_NET_CTL_TXEN | MAC_NET_CTL_RXEN;
+
+ if (oa_tc6_write_register(priv->tc6, LAN865X_REG_MAC_NET_CTL, regval))
+ return -ENODEV;
+
+ return 0;
+}
+
+static int lan865x_net_open(struct net_device *netdev)
+{
+ struct lan865x_priv *priv = netdev_priv(netdev);
+ int ret;
+
+ ret = lan865x_hw_enable(priv);
+ if (ret) {
+ netdev_err(netdev, "Failed to enable hardware: %d\n", ret);
+ return ret;
+ }
+
+ phy_start(netdev->phydev);
+
+ return 0;
+}
+
+static const struct net_device_ops lan865x_netdev_ops = {
+ .ndo_open = lan865x_net_open,
+ .ndo_stop = lan865x_net_close,
+ .ndo_start_xmit = lan865x_send_packet,
+ .ndo_set_rx_mode = lan865x_set_multicast_list,
+ .ndo_set_mac_address = lan865x_set_mac_address,
+};
+
+static int lan865x_probe(struct spi_device *spi)
+{
+ struct net_device *netdev;
+ struct lan865x_priv *priv;
+ int ret;
+
+ netdev = alloc_etherdev(sizeof(struct lan865x_priv));
+ if (!netdev)
+ return -ENOMEM;
+
+ priv = netdev_priv(netdev);
+ priv->netdev = netdev;
+ priv->spi = spi;
+ spi_set_drvdata(spi, priv);
+ INIT_WORK(&priv->multicast_work, lan865x_multicast_work_handler);
+
+ priv->tc6 = oa_tc6_init(spi, netdev);
+ if (!priv->tc6) {
+ ret = -ENODEV;
+ goto free_netdev;
+ }
+
+ /* As per the point s3 in the below errata, SPI receive Ethernet frame
+ * transfer may halt when starting the next frame in the same data block
+ * (chunk) as the end of a previous frame. The RFA field should be
+ * configured to 01b or 10b for proper operation. In these modes, only
+ * one receive Ethernet frame will be placed in a single data block.
+ * When the RFA field is written to 01b, received frames will be forced
+ * to only start in the first word of the data block payload (SWO=0). As
+ * recommended, enable zero align receive frame feature for proper
+ * operation.
+ *
+ * https://ww1.microchip.com/downloads/aemDocuments/documents/AIS/ProductDocuments/Errata/LAN8650-1-Errata-80001075.pdf
+ */
+ ret = oa_tc6_zero_align_receive_frame_enable(priv->tc6);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to set ZARFE: %d\n", ret);
+ goto oa_tc6_exit;
+ }
+
+ /* Get the MAC address from the SPI device tree node */
+ if (device_get_ethdev_address(&spi->dev, netdev))
+ eth_hw_addr_random(netdev);
+
+ ret = lan865x_set_hw_macaddr(priv, netdev->dev_addr);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to configure MAC: %d\n", ret);
+ goto oa_tc6_exit;
+ }
+
+ netdev->if_port = IF_PORT_10BASET;
+ netdev->irq = spi->irq;
+ netdev->netdev_ops = &lan865x_netdev_ops;
+ netdev->ethtool_ops = &lan865x_ethtool_ops;
+
+ ret = register_netdev(netdev);
+ if (ret) {
+ dev_err(&spi->dev, "Register netdev failed (ret = %d)", ret);
+ goto oa_tc6_exit;
+ }
+
+ return 0;
+
+oa_tc6_exit:
+ oa_tc6_exit(priv->tc6);
+free_netdev:
+ free_netdev(priv->netdev);
+ return ret;
+}
+
+static void lan865x_remove(struct spi_device *spi)
+{
+ struct lan865x_priv *priv = spi_get_drvdata(spi);
+
+ cancel_work_sync(&priv->multicast_work);
+ unregister_netdev(priv->netdev);
+ oa_tc6_exit(priv->tc6);
+ free_netdev(priv->netdev);
+}
+
+static const struct spi_device_id spidev_spi_ids[] = {
+ { .name = "lan8650" },
+ {},
+};
+
+static const struct of_device_id lan865x_dt_ids[] = {
+ { .compatible = "microchip,lan8650" },
+ { /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, lan865x_dt_ids);
+
+static struct spi_driver lan865x_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = lan865x_dt_ids,
+ },
+ .probe = lan865x_probe,
+ .remove = lan865x_remove,
+ .id_table = spidev_spi_ids,
+};
+module_spi_driver(lan865x_driver);
+
+MODULE_DESCRIPTION(DRV_NAME " 10Base-T1S MACPHY Ethernet Driver");
+MODULE_AUTHOR("Parthiban Veerasooran <parthiban.veerasooran@microchip.com>");
+MODULE_LICENSE("GPL");