1 // SPDX-License-Identifier: GPL-2.0+ 2 /* Microchip Sparx5 Switch driver 3 * 4 * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries. 5 */ 6 7 #include <linux/module.h> 8 #include <linux/phylink.h> 9 #include <linux/device.h> 10 #include <linux/netdevice.h> 11 #include <linux/sfp.h> 12 13 #include "sparx5_main_regs.h" 14 #include "sparx5_main.h" 15 #include "sparx5_port.h" 16 17 static bool port_conf_has_changed(struct sparx5_port_config *a, struct sparx5_port_config *b) 18 { 19 if (a->speed != b->speed || 20 a->portmode != b->portmode || 21 a->autoneg != b->autoneg || 22 a->pause_adv != b->pause_adv || 23 a->power_down != b->power_down || 24 a->media != b->media) 25 return true; 26 return false; 27 } 28 29 static struct phylink_pcs * 30 sparx5_phylink_mac_select_pcs(struct phylink_config *config, 31 phy_interface_t interface) 32 { 33 struct sparx5_port *port = netdev_priv(to_net_dev(config->dev)); 34 35 return &port->phylink_pcs; 36 } 37 38 static void sparx5_phylink_mac_config(struct phylink_config *config, 39 unsigned int mode, 40 const struct phylink_link_state *state) 41 { 42 /* Currently not used */ 43 } 44 45 static void sparx5_phylink_mac_link_up(struct phylink_config *config, 46 struct phy_device *phy, 47 unsigned int mode, 48 phy_interface_t interface, 49 int speed, int duplex, 50 bool tx_pause, bool rx_pause) 51 { 52 struct sparx5_port *port = netdev_priv(to_net_dev(config->dev)); 53 struct sparx5_port_config conf; 54 int err; 55 56 conf = port->conf; 57 conf.duplex = duplex; 58 conf.pause = 0; 59 conf.pause |= tx_pause ? MLO_PAUSE_TX : 0; 60 conf.pause |= rx_pause ? MLO_PAUSE_RX : 0; 61 conf.speed = speed; 62 /* Configure the port to speed/duplex/pause */ 63 err = sparx5_port_config(port->sparx5, port, &conf); 64 if (err) 65 netdev_err(port->ndev, "port config failed: %d\n", err); 66 } 67 68 static void sparx5_phylink_mac_link_down(struct phylink_config *config, 69 unsigned int mode, 70 phy_interface_t interface) 71 { 72 /* Currently not used */ 73 } 74 75 static struct sparx5_port *sparx5_pcs_to_port(struct phylink_pcs *pcs) 76 { 77 return container_of(pcs, struct sparx5_port, phylink_pcs); 78 } 79 80 static void sparx5_pcs_get_state(struct phylink_pcs *pcs, 81 struct phylink_link_state *state) 82 { 83 struct sparx5_port *port = sparx5_pcs_to_port(pcs); 84 struct sparx5_port_status status; 85 86 sparx5_get_port_status(port->sparx5, port, &status); 87 state->link = status.link && !status.link_down; 88 state->an_complete = status.an_complete; 89 state->speed = status.speed; 90 state->duplex = status.duplex; 91 state->pause = status.pause; 92 } 93 94 static int sparx5_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 95 phy_interface_t interface, 96 const unsigned long *advertising, 97 bool permit_pause_to_mac) 98 { 99 struct sparx5_port *port = sparx5_pcs_to_port(pcs); 100 struct sparx5_port_config conf; 101 int ret = 0; 102 103 conf = port->conf; 104 conf.power_down = false; 105 conf.portmode = interface; 106 conf.inband = neg_mode == PHYLINK_PCS_NEG_INBAND_DISABLED || 107 neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED; 108 conf.autoneg = neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED; 109 conf.pause_adv = 0; 110 if (phylink_test(advertising, Pause)) 111 conf.pause_adv |= ADVERTISE_1000XPAUSE; 112 if (phylink_test(advertising, Asym_Pause)) 113 conf.pause_adv |= ADVERTISE_1000XPSE_ASYM; 114 if (sparx5_is_baser(interface)) { 115 if (phylink_test(advertising, FIBRE)) 116 conf.media = PHY_MEDIA_SR; 117 else 118 conf.media = PHY_MEDIA_DAC; 119 } 120 if (!port_conf_has_changed(&port->conf, &conf)) 121 return ret; 122 /* Enable the PCS matching this interface type */ 123 ret = sparx5_port_pcs_set(port->sparx5, port, &conf); 124 if (ret) 125 netdev_err(port->ndev, "port PCS config failed: %d\n", ret); 126 return ret; 127 } 128 129 static void sparx5_pcs_aneg_restart(struct phylink_pcs *pcs) 130 { 131 /* Currently not used */ 132 } 133 134 const struct phylink_pcs_ops sparx5_phylink_pcs_ops = { 135 .pcs_get_state = sparx5_pcs_get_state, 136 .pcs_config = sparx5_pcs_config, 137 .pcs_an_restart = sparx5_pcs_aneg_restart, 138 }; 139 140 const struct phylink_mac_ops sparx5_phylink_mac_ops = { 141 .mac_select_pcs = sparx5_phylink_mac_select_pcs, 142 .mac_config = sparx5_phylink_mac_config, 143 .mac_link_down = sparx5_phylink_mac_link_down, 144 .mac_link_up = sparx5_phylink_mac_link_up, 145 }; 146