linux/drivers/net/phy/bcm87xx.c
Andrew Lunn cad75717c7 net: phy: bcm87xx: Use mmd helpers
Rather than construct special phy device addresses to access C45
registers, use the mmd helpers. These will directly call the C45 API
of the MDIO bus driver.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-05-02 13:21:38 +02:00

226 lines
4.9 KiB
C

// 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");