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
port_conf_has_changed(struct sparx5_port_config * a,struct sparx5_port_config * b)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 *
sparx5_phylink_mac_select_pcs(struct phylink_config * config,phy_interface_t interface)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
sparx5_phylink_mac_config(struct phylink_config * config,unsigned int mode,const struct phylink_link_state * state)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
sparx5_phylink_mac_link_up(struct phylink_config * config,struct phy_device * phy,unsigned int mode,phy_interface_t interface,int speed,int duplex,bool tx_pause,bool rx_pause)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
sparx5_phylink_mac_link_down(struct phylink_config * config,unsigned int mode,phy_interface_t interface)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
sparx5_pcs_to_port(struct phylink_pcs * pcs)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
sparx5_pcs_get_state(struct phylink_pcs * pcs,struct phylink_link_state * state)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
sparx5_pcs_config(struct phylink_pcs * pcs,unsigned int neg_mode,phy_interface_t interface,const unsigned long * advertising,bool permit_pause_to_mac)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
sparx5_pcs_aneg_restart(struct phylink_pcs * pcs)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