1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
8 #include <linux/pcs-lynx.h>
38 #define lynx_to_phylink_pcs(lynx) (&(lynx)->pcs)
44 	return lynx->mdio;  in lynx_get_mdio_device()
51 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_get_state_usxgmii()
52 	int addr = pcs->addr;  in lynx_pcs_get_state_usxgmii()
59 	state->link = !!(status & MDIO_STAT1_LSTATUS);  in lynx_pcs_get_state_usxgmii()
60 	state->an_complete = !!(status & MDIO_AN_STAT1_COMPLETE);  in lynx_pcs_get_state_usxgmii()
61 	if (!state->link || !state->an_complete)  in lynx_pcs_get_state_usxgmii()
79 		state->link = false;  in lynx_pcs_get_state_2500basex()
83 	state->link = !!(bmsr & BMSR_LSTATUS);  in lynx_pcs_get_state_2500basex()
84 	state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);  in lynx_pcs_get_state_2500basex()
85 	if (!state->link)  in lynx_pcs_get_state_2500basex()
88 	state->speed = SPEED_2500;  in lynx_pcs_get_state_2500basex()
89 	state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX;  in lynx_pcs_get_state_2500basex()
90 	state->duplex = DUPLEX_FULL;  in lynx_pcs_get_state_2500basex()
98 	switch (state->interface) {  in lynx_pcs_get_state()
102 		phylink_mii_c22_pcs_get_state(lynx->mdio, state);  in lynx_pcs_get_state()
105 		lynx_pcs_get_state_2500basex(lynx->mdio, state);  in lynx_pcs_get_state()
108 		lynx_pcs_get_state_usxgmii(lynx->mdio, state);  in lynx_pcs_get_state()
111 		phylink_mii_c45_pcs_get_state(lynx->mdio, state);  in lynx_pcs_get_state()
117 	dev_dbg(&lynx->mdio->dev,  in lynx_pcs_get_state()
119 		phy_modes(state->interface),  in lynx_pcs_get_state()
120 		phy_speed_to_str(state->speed),  in lynx_pcs_get_state()
121 		phy_duplex_to_str(state->duplex),  in lynx_pcs_get_state()
122 		state->link, state->an_enabled, state->an_complete);  in lynx_pcs_get_state()
163 	struct mii_bus *bus = pcs->bus;  in lynx_pcs_config_usxgmii()
164 	int addr = pcs->addr;  in lynx_pcs_config_usxgmii()
167 		dev_err(&pcs->dev, "USXGMII only supports in-band AN for now\n");  in lynx_pcs_config_usxgmii()
168 		return -EOPNOTSUPP;  in lynx_pcs_config_usxgmii()
189 		return lynx_pcs_config_giga(lynx->mdio, mode, ifmode,  in lynx_pcs_config()
193 			dev_err(&lynx->mdio->dev,  in lynx_pcs_config()
194 				"AN not supported on 3.125GHz SerDes lane\n");  in lynx_pcs_config()
195 			return -EOPNOTSUPP;  in lynx_pcs_config()
199 		return lynx_pcs_config_usxgmii(lynx->mdio, mode, advertising);  in lynx_pcs_config()
204 		return -EOPNOTSUPP;  in lynx_pcs_config()
214 	phylink_mii_c22_pcs_an_restart(lynx->mdio);  in lynx_pcs_an_restart()
223 	 * when not operating on in-band mode  in lynx_pcs_link_up_sgmii()
245 		dev_err(&pcs->dev, "Invalid PCS speed %d\n", speed);  in lynx_pcs_link_up_sgmii()
255 /* 2500Base-X is SerDes protocol 7 on Felix and 6 on ENETC. It is a SerDes lane
257  * auto-negotiation of any link parameters. Electrically it is compatible with
258  * a single lane of XAUI.
261  * - Downgrading the link speed by duplicating symbols
262  * - Auto-negotiation
267  * AN, we call this PHY interface type 2500Base-X. In case a PHY negotiates a
268  * lower link speed on line side, the system-side interface remains fixed at
278 		dev_err(&pcs->dev, "AN not supported for 2500BaseX\n");  in lynx_pcs_link_up_2500basex()
300 		lynx_pcs_link_up_sgmii(lynx->mdio, mode, speed, duplex);  in lynx_pcs_link_up()
303 		lynx_pcs_link_up_2500basex(lynx->mdio, mode, speed, duplex);  in lynx_pcs_link_up()
306 		/* At the moment, only in-band AN is supported for USXGMII  in lynx_pcs_link_up()
330 	lynx->mdio = mdio;  in lynx_pcs_create()
331 	lynx->pcs.ops = &lynx_pcs_phylink_ops;  in lynx_pcs_create()
332 	lynx->pcs.poll = true;  in lynx_pcs_create()
346 MODULE_LICENSE("Dual BSD/GPL");