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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2011 - 2012 Cavium, Inc.
*/
#include <linux/module.h>
#include <linux/phy.h>
#include <linux/of.h>
#define PHY_ID_BCM8706 0x0143bdc1
#define PHY_ID_BCM8727 0x0143bff0
#define BCM87XX_PMD_RX_SIGNAL_DETECT 0x000a
#define BCM87XX_10GBASER_PCS_STATUS 0x0020
#define BCM87XX_XGXS_LANE_STATUS 0x0018
#define BCM87XX_LASI_CONTROL 0x9002
#define BCM87XX_LASI_STATUS 0x9005
#if IS_ENABLED(CONFIG_OF_MDIO)
/* Set and/or override some configuration registers based on the
* broadcom,c45-reg-init property stored in the of_node for the phydev.
*
* broadcom,c45-reg-init = <devid reg mask value>,...;
*
* There may be one or more sets of <devid reg mask value>:
*
* devid: which sub-device to use.
* reg: the register.
* mask: if non-zero, ANDed with existing register value.
* value: ORed with the masked value and written to the regiser.
*
*/
static int bcm87xx_of_reg_init(struct phy_device *phydev)
{
const __be32 *paddr;
const __be32 *paddr_end;
int len, ret;
if (!phydev->mdio.dev.of_node)
return 0;
paddr = of_get_property(phydev->mdio.dev.of_node,
"broadcom,c45-reg-init", &len);
if (!paddr)
return 0;
paddr_end = paddr + (len /= sizeof(*paddr));
ret = 0;
while (paddr + 3 < paddr_end) {
u16 devid = be32_to_cpup(paddr++);
u16 reg = be32_to_cpup(paddr++);
u16 mask = be32_to_cpup(paddr++);
u16 val_bits = be32_to_cpup(paddr++);
int val = 0;
if (mask) {
val = phy_read_mmd(phydev, devid, reg);
if (val < 0) {
ret = val;
goto err;
}
val &= mask;
}
val |= val_bits;
ret = phy_write_mmd(phydev, devid, reg, val);
if (ret < 0)
goto err;
}
err:
return ret;
}
#else
static int bcm87xx_of_reg_init(struct phy_device *phydev)
{
return 0;
}
#endif /* CONFIG_OF_MDIO */
static int bcm87xx_get_features(struct phy_device *phydev)
{
linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
phydev->supported);
return 0;
}
static int bcm87xx_config_init(struct phy_device *phydev)
{
return bcm87xx_of_reg_init(phydev);
}
static int bcm87xx_config_aneg(struct phy_device *phydev)
{
return -EINVAL;
}
static int bcm87xx_read_status(struct phy_device *phydev)
{
int rx_signal_detect;
int pcs_status;
int xgxs_lane_status;
rx_signal_detect = phy_read_mmd(phydev, MDIO_MMD_PMAPMD,
BCM87XX_PMD_RX_SIGNAL_DETECT);
if (rx_signal_detect < 0)
return rx_signal_detect;
if ((rx_signal_detect & 1) == 0)
goto no_link;
pcs_status = phy_read_mmd(phydev, MDIO_MMD_PCS,
BCM87XX_10GBASER_PCS_STATUS);
if (pcs_status < 0)
return pcs_status;
if ((pcs_status & 1) == 0)
goto no_link;
xgxs_lane_status = phy_read_mmd(phydev, MDIO_MMD_PHYXS,
BCM87XX_XGXS_LANE_STATUS);
if (xgxs_lane_status < 0)
return xgxs_lane_status;
if ((xgxs_lane_status & 0x1000) == 0)
goto no_link;
phydev->speed = 10000;
phydev->link = 1;
phydev->duplex = 1;
return 0;
no_link:
phydev->link = 0;
return 0;
}
static int bcm87xx_config_intr(struct phy_device *phydev)
{
int reg, err;
reg = phy_read_mmd(phydev, MDIO_MMD_PCS, BCM87XX_LASI_CONTROL);
if (reg < 0)
return reg;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
err = phy_read_mmd(phydev, MDIO_MMD_PCS, BCM87XX_LASI_STATUS);
if (err)
return err;
reg |= 1;
err = phy_write_mmd(phydev, MDIO_MMD_PCS,
BCM87XX_LASI_CONTROL, reg);
} else {
reg &= ~1;
err = phy_write_mmd(phydev, MDIO_MMD_PCS,
BCM87XX_LASI_CONTROL, reg);
if (err)
return err;
err = phy_read_mmd(phydev, MDIO_MMD_PCS, BCM87XX_LASI_STATUS);
}
return err;
}
static irqreturn_t bcm87xx_handle_interrupt(struct phy_device *phydev)
{
int irq_status;
irq_status = phy_read(phydev, BCM87XX_LASI_STATUS);
if (irq_status < 0) {
phy_error(phydev);
return IRQ_NONE;
}
if (irq_status == 0)
return IRQ_NONE;
phy_trigger_machine(phydev);
return IRQ_HANDLED;
}
static int bcm8706_match_phy_device(struct phy_device *phydev)
{
return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8706;
}
static int bcm8727_match_phy_device(struct phy_device *phydev)
{
return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8727;
}
static struct phy_driver bcm87xx_driver[] = {
{
.phy_id = PHY_ID_BCM8706,
.phy_id_mask = 0xffffffff,
.name = "Broadcom BCM8706",
.get_features = bcm87xx_get_features,
.config_init = bcm87xx_config_init,
.config_aneg = bcm87xx_config_aneg,
.read_status = bcm87xx_read_status,
.config_intr = bcm87xx_config_intr,
.handle_interrupt = bcm87xx_handle_interrupt,
.match_phy_device = bcm8706_match_phy_device,
}, {
.phy_id = PHY_ID_BCM8727,
.phy_id_mask = 0xffffffff,
.name = "Broadcom BCM8727",
.get_features = bcm87xx_get_features,
.config_init = bcm87xx_config_init,
.config_aneg = bcm87xx_config_aneg,
.read_status = bcm87xx_read_status,
.config_intr = bcm87xx_config_intr,
.handle_interrupt = bcm87xx_handle_interrupt,
.match_phy_device = bcm8727_match_phy_device,
} };
module_phy_driver(bcm87xx_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Broadcom BCM87xx PHY driver");
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