1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
8 #include <linux/pcs-lynx.h>
37 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_get_state_usxgmii()  local
38 	int addr = pcs->addr;  in lynx_pcs_get_state_usxgmii()  local
41 	status = mdiobus_c45_read(bus, addr, MDIO_MMD_VEND2, MII_BMSR);  in lynx_pcs_get_state_usxgmii()
45 	state->link = !!(status & MDIO_STAT1_LSTATUS);  in lynx_pcs_get_state_usxgmii()
46 	state->an_complete = !!(status & MDIO_AN_STAT1_COMPLETE);  in lynx_pcs_get_state_usxgmii()
47 	if (!state->link || !state->an_complete)  in lynx_pcs_get_state_usxgmii()
50 	lpa = mdiobus_c45_read(bus, addr, MDIO_MMD_VEND2, MII_LPA);  in lynx_pcs_get_state_usxgmii()
60 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_get_state_2500basex()  local
61 	int addr = pcs->addr;  in lynx_pcs_get_state_2500basex()  local
64 	bmsr = mdiobus_read(bus, addr, MII_BMSR);  in lynx_pcs_get_state_2500basex()
65 	lpa = mdiobus_read(bus, addr, MII_LPA);  in lynx_pcs_get_state_2500basex()
67 		state->link = false;  in lynx_pcs_get_state_2500basex()
71 	state->link = !!(bmsr & BMSR_LSTATUS);  in lynx_pcs_get_state_2500basex()
72 	state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);  in lynx_pcs_get_state_2500basex()
73 	if (!state->link)  in lynx_pcs_get_state_2500basex()
76 	state->speed = SPEED_2500;  in lynx_pcs_get_state_2500basex()
77 	state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX;  in lynx_pcs_get_state_2500basex()
78 	state->duplex = DUPLEX_FULL;  in lynx_pcs_get_state_2500basex()
86 	switch (state->interface) {  in lynx_pcs_get_state()
90 		phylink_mii_c22_pcs_get_state(lynx->mdio, state);  in lynx_pcs_get_state()
93 		lynx_pcs_get_state_2500basex(lynx->mdio, state);  in lynx_pcs_get_state()
96 		lynx_pcs_get_state_usxgmii(lynx->mdio, state);  in lynx_pcs_get_state()
99 		phylink_mii_c45_pcs_get_state(lynx->mdio, state);  in lynx_pcs_get_state()
105 	dev_dbg(&lynx->mdio->dev,  in lynx_pcs_get_state()
107 		phy_modes(state->interface),  in lynx_pcs_get_state()
108 		phy_speed_to_str(state->speed),  in lynx_pcs_get_state()
109 		phy_duplex_to_str(state->duplex),  in lynx_pcs_get_state()
110 		state->link, state->an_enabled, state->an_complete);  in lynx_pcs_get_state()
117 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_config_1000basex()  local
118 	int addr = pcs->addr;  in lynx_pcs_config_1000basex()  local
123 	mdiobus_write(bus, addr, LINK_TIMER_LO, link_timer & 0xffff);  in lynx_pcs_config_1000basex()
124 	mdiobus_write(bus, addr, LINK_TIMER_HI, link_timer >> 16);  in lynx_pcs_config_1000basex()
126 	err = mdiobus_modify(bus, addr, IF_MODE,  in lynx_pcs_config_1000basex()
140 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_config_sgmii()  local
141 	int addr = pcs->addr;  in lynx_pcs_config_sgmii()  local
153 		mdiobus_write(bus, addr, LINK_TIMER_LO, link_timer & 0xffff);  in lynx_pcs_config_sgmii()
154 		mdiobus_write(bus, addr, LINK_TIMER_HI, link_timer >> 16);  in lynx_pcs_config_sgmii()
156 	err = mdiobus_modify(bus, addr, IF_MODE,  in lynx_pcs_config_sgmii()
169 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_config_usxgmii()  local
170 	int addr = pcs->addr;  in lynx_pcs_config_usxgmii()  local
173 		dev_err(&pcs->dev, "USXGMII only supports in-band AN for now\n");  in lynx_pcs_config_usxgmii()
174 		return -EOPNOTSUPP;  in lynx_pcs_config_usxgmii()
178 	return mdiobus_c45_write(bus, addr, MDIO_MMD_VEND2, MII_ADVERTISE,  in lynx_pcs_config_usxgmii()
193 		return lynx_pcs_config_1000basex(lynx->mdio, mode, advertising);  in lynx_pcs_config()
196 		return lynx_pcs_config_sgmii(lynx->mdio, mode, advertising);  in lynx_pcs_config()
199 			dev_err(&lynx->mdio->dev,  in lynx_pcs_config()
201 			return -EOPNOTSUPP;  in lynx_pcs_config()
205 		return lynx_pcs_config_usxgmii(lynx->mdio, mode, advertising);  in lynx_pcs_config()
210 		return -EOPNOTSUPP;  in lynx_pcs_config()
220 	phylink_mii_c22_pcs_an_restart(lynx->mdio);  in lynx_pcs_an_restart()
226 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_link_up_sgmii()  local
228 	int addr = pcs->addr;  in lynx_pcs_link_up_sgmii()  local
231 	 * when not operating on in-band mode  in lynx_pcs_link_up_sgmii()
253 		dev_err(&pcs->dev, "Invalid PCS speed %d\n", speed);  in lynx_pcs_link_up_sgmii()
258 	mdiobus_modify(bus, addr, IF_MODE,  in lynx_pcs_link_up_sgmii()
263 /* 2500Base-X is SerDes protocol 7 on Felix and 6 on ENETC. It is a SerDes lane
265  * auto-negotiation of any link parameters. Electrically it is compatible with
269  * - Downgrading the link speed by duplicating symbols
270  * - Auto-negotiation
275  * AN, we call this PHY interface type 2500Base-X. In case a PHY negotiates a
276  * lower link speed on line side, the system-side interface remains fixed at
283 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_link_up_2500basex()  local
284 	int addr = pcs->addr;  in lynx_pcs_link_up_2500basex()  local
288 		dev_err(&pcs->dev, "AN not supported for 2500BaseX\n");  in lynx_pcs_link_up_2500basex()
296 	mdiobus_modify(bus, addr, IF_MODE,  in lynx_pcs_link_up_2500basex()
310 		lynx_pcs_link_up_sgmii(lynx->mdio, mode, speed, duplex);  in lynx_pcs_link_up()
313 		lynx_pcs_link_up_2500basex(lynx->mdio, mode, speed, duplex);  in lynx_pcs_link_up()
316 		/* At the moment, only in-band AN is supported for USXGMII  in lynx_pcs_link_up()
340 	lynx_pcs->mdio = mdio;  in lynx_pcs_create()
341 	lynx_pcs->pcs.ops = &lynx_pcs_phylink_ops;  in lynx_pcs_create()
342 	lynx_pcs->pcs.poll = true;  in lynx_pcs_create()