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