1 // SPDX-License-Identifier: GPL-2.0+
3  * Broadcom BCM7xxx internal transceivers support.
5  * Copyright (C) 2014-2017 Broadcom
9 #include <linux/phy.h>
11 #include "bcm-phy-lib.h"
17 /* Broadcom BCM7xxx internal PHY registers */
59 	/* AFE_RXCONFIG_2, set rCal offset for HT=0 code and LT=-2 code */  in bcm7xxx_28nm_d0_afe_config_init()
74 	/* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal  in bcm7xxx_28nm_d0_afe_config_init()
79 	/* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */  in bcm7xxx_28nm_d0_afe_config_init()
102 	/* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal  in bcm7xxx_28nm_e0_plus_afe_config_init()
107 	/* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */  in bcm7xxx_28nm_e0_plus_afe_config_init()
146 	u8 rev = PHY_BRCM_7XXX_REV(phydev->dev_flags);  in bcm7xxx_28nm_config_init()
147 	u8 patch = PHY_BRCM_7XXX_PATCH(phydev->dev_flags);  in bcm7xxx_28nm_config_init()
155 		rev = phydev->phy_id & ~phydev->drv->phy_id_mask;  in bcm7xxx_28nm_config_init()
157 	pr_info_once("%s: %s PHY revision: 0x%02x, patch: %d\n",  in bcm7xxx_28nm_config_init()
158 		     phydev_name(phydev), phydev->drv->name, rev, patch);  in bcm7xxx_28nm_config_init()
161 	 * internal inverter may not allow the first MDIO transaction to pass  in bcm7xxx_28nm_config_init()
211 	/* Re-apply workarounds coming out suspend/resume */  in bcm7xxx_28nm_resume()
216 	/* 28nm Gigabit PHYs come out of reset without any half-duplex  in bcm7xxx_28nm_resume()
218 	 * cause any problems with the PHY library since genphy_config_aneg()  in bcm7xxx_28nm_resume()
219 	 * gracefully handles auto-negotiated and forced modes.  in bcm7xxx_28nm_resume()
248 	mutex_lock(&dev->mdio.bus->mdio_lock);  in phy_set_clr_bits()
250 	mutex_unlock(&dev->mdio.bus->mdio_lock);  in phy_set_clr_bits()
265 	/* Set current trim values INT_trim = -1, Ext_trim =0 */  in bcm7xxx_28nm_ephy_01_afe_config_init()
300 /* The 28nm EPHY does not support Clause 45 (MMD) used by bcm-phy-lib */
311 	/* Enable auto-power down */  in bcm7xxx_28nm_ephy_apd_enable()
391 	u8 rev = phydev->phy_id & ~phydev->drv->phy_id_mask;  in bcm7xxx_28nm_ephy_config_init()
394 	pr_info_once("%s: %s PHY revision: 0x%02x\n",  in bcm7xxx_28nm_ephy_config_init()
395 		     phydev_name(phydev), phydev->drv->name, rev);  in bcm7xxx_28nm_ephy_config_init()
398 	 * where the internal inverter may not allow the first MDIO transaction  in bcm7xxx_28nm_ephy_config_init()
404 	/* Apply AFE software work-around if necessary */  in bcm7xxx_28nm_ephy_config_init()
453 		return -EOPNOTSUPP;  in bcm7xxx_28nm_ephy_read_mmd()
483 		return -EOPNOTSUPP;  in bcm7xxx_28nm_ephy_write_mmd()
509 	/* Re-apply workarounds coming out suspend/resume */  in bcm7xxx_28nm_ephy_resume()
548 /* Workaround for putting the PHY in IDDQ mode, required
582 	switch (tuna->id) {  in bcm7xxx_28nm_get_tunable()
586 		return -EOPNOTSUPP;  in bcm7xxx_28nm_get_tunable()
597 	switch (tuna->id) {  in bcm7xxx_28nm_set_tunable()
602 		return -EOPNOTSUPP;  in bcm7xxx_28nm_set_tunable()
608 	/* Disable EEE advertisement since this prevents the PHY  in bcm7xxx_28nm_set_tunable()
609 	 * from successfully linking up, trigger auto-negotiation restart  in bcm7xxx_28nm_set_tunable()
622 	struct bcm7xxx_phy_priv *priv = phydev->priv;  in bcm7xxx_28nm_get_phy_stats()
624 	bcm_phy_get_stats(phydev, priv->stats, stats, data);  in bcm7xxx_28nm_get_phy_stats()
632 	priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);  in bcm7xxx_28nm_probe()
634 		return -ENOMEM;  in bcm7xxx_28nm_probe()
636 	phydev->priv = priv;  in bcm7xxx_28nm_probe()
638 	priv->stats = devm_kcalloc(&phydev->mdio.dev,  in bcm7xxx_28nm_probe()
641 	if (!priv->stats)  in bcm7xxx_28nm_probe()
642 		return -ENOMEM;  in bcm7xxx_28nm_probe()
644 	priv->clk = devm_clk_get_optional(&phydev->mdio.dev, NULL);  in bcm7xxx_28nm_probe()
645 	if (IS_ERR(priv->clk))  in bcm7xxx_28nm_probe()
646 		return PTR_ERR(priv->clk);  in bcm7xxx_28nm_probe()
648 	ret = clk_prepare_enable(priv->clk);  in bcm7xxx_28nm_probe()
653 	 * internal inverter may not allow the first MDIO transaction to pass  in bcm7xxx_28nm_probe()
656 	 * PHY will succeed.  in bcm7xxx_28nm_probe()
665 	struct bcm7xxx_phy_priv *priv = phydev->priv;  in bcm7xxx_28nm_remove()
667 	clk_disable_unprepare(priv->clk);  in bcm7xxx_28nm_remove()
765 MODULE_DESCRIPTION("Broadcom BCM7xxx internal PHY driver");