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98 lines
2.4 KiB
98 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Driver for the Renesas PHY uPD60620. |
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* |
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* Copyright (C) 2015 Softing Industrial Automation GmbH |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/phy.h> |
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#define UPD60620_PHY_ID 0xb8242824 |
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/* Extended Registers and values */ |
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/* PHY Special Control/Status */ |
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#define PHY_PHYSCR 0x1F /* PHY.31 */ |
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#define PHY_PHYSCR_10MB 0x0004 /* PHY speed = 10mb */ |
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#define PHY_PHYSCR_100MB 0x0008 /* PHY speed = 100mb */ |
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#define PHY_PHYSCR_DUPLEX 0x0010 /* PHY Duplex */ |
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/* PHY Special Modes */ |
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#define PHY_SPM 0x12 /* PHY.18 */ |
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/* Init PHY */ |
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static int upd60620_config_init(struct phy_device *phydev) |
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{ |
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/* Enable support for passive HUBs (could be a strap option) */ |
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/* PHYMODE: All speeds, HD in parallel detect */ |
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return phy_write(phydev, PHY_SPM, 0x0180 | phydev->mdio.addr); |
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} |
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/* Get PHY status from common registers */ |
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static int upd60620_read_status(struct phy_device *phydev) |
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{ |
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int phy_state; |
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/* Read negotiated state */ |
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phy_state = phy_read(phydev, MII_BMSR); |
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if (phy_state < 0) |
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return phy_state; |
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phydev->link = 0; |
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linkmode_zero(phydev->lp_advertising); |
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phydev->pause = 0; |
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phydev->asym_pause = 0; |
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if (phy_state & (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) { |
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phy_state = phy_read(phydev, PHY_PHYSCR); |
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if (phy_state < 0) |
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return phy_state; |
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if (phy_state & (PHY_PHYSCR_10MB | PHY_PHYSCR_100MB)) { |
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phydev->link = 1; |
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phydev->speed = SPEED_10; |
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phydev->duplex = DUPLEX_HALF; |
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if (phy_state & PHY_PHYSCR_100MB) |
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phydev->speed = SPEED_100; |
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if (phy_state & PHY_PHYSCR_DUPLEX) |
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phydev->duplex = DUPLEX_FULL; |
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phy_state = phy_read(phydev, MII_LPA); |
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if (phy_state < 0) |
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return phy_state; |
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mii_lpa_to_linkmode_lpa_t(phydev->lp_advertising, |
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phy_state); |
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phy_resolve_aneg_pause(phydev); |
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} |
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} |
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return 0; |
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} |
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MODULE_DESCRIPTION("Renesas uPD60620 PHY driver"); |
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MODULE_AUTHOR("Bernd Edlinger <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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static struct phy_driver upd60620_driver[1] = { { |
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.phy_id = UPD60620_PHY_ID, |
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.phy_id_mask = 0xfffffffe, |
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.name = "Renesas uPD60620", |
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/* PHY_BASIC_FEATURES */ |
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.flags = 0, |
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.config_init = upd60620_config_init, |
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.read_status = upd60620_read_status, |
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} }; |
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module_phy_driver(upd60620_driver); |
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static struct mdio_device_id __maybe_unused upd60620_tbl[] = { |
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{ UPD60620_PHY_ID, 0xfffffffe }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(mdio, upd60620_tbl);
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