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linux/drivers/net/phy/dp83869.c
Grygorii Strashko 94e86ef1b8 net: phy: dp83869: support mii mode when rgmii strap cfg is used 
The DP83869 PHY on TI's k3-am642-evm supports both MII and RGMII
interfaces and is configured by default to use RGMII interface (strap).
However, the board design allows switching dynamically to MII interface
for testing purposes by applying different set of pinmuxes.

To support switching to MII interface, update the DP83869 PHY driver to
configure OP_MODE_DECODE.RGMII_MII_SEL(bit 5) properly when MII PHY
interface mode is requested.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230508070359.357474-1-s-vadapalli@ti.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2023-05-09 11:57:53 +02:00

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// SPDX-License-Identifier: GPL-2.0
/* Driver for the Texas Instruments DP83869 PHY
* Copyright (C) 2019 Texas Instruments Inc.
*/
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/mii.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy.h>
#include <linux/delay.h>
#include <linux/bitfield.h>
#include <dt-bindings/net/ti-dp83869.h>
#define DP83869_PHY_ID 0x2000a0f1
#define DP83561_PHY_ID 0x2000a1a4
#define DP83869_DEVADDR 0x1f
#define MII_DP83869_PHYCTRL 0x10
#define MII_DP83869_MICR 0x12
#define MII_DP83869_ISR 0x13
#define DP83869_CFG2 0x14
#define DP83869_CTRL 0x1f
#define DP83869_CFG4 0x1e
/* Extended Registers */
#define DP83869_GEN_CFG3 0x0031
#define DP83869_RGMIICTL 0x0032
#define DP83869_STRAP_STS1 0x006e
#define DP83869_RGMIIDCTL 0x0086
#define DP83869_RXFCFG 0x0134
#define DP83869_RXFPMD1 0x0136
#define DP83869_RXFPMD2 0x0137
#define DP83869_RXFPMD3 0x0138
#define DP83869_RXFSOP1 0x0139
#define DP83869_RXFSOP2 0x013A
#define DP83869_RXFSOP3 0x013B
#define DP83869_IO_MUX_CFG 0x0170
#define DP83869_OP_MODE 0x01df
#define DP83869_FX_CTRL 0x0c00
#define DP83869_SW_RESET BIT(15)
#define DP83869_SW_RESTART BIT(14)
/* MICR Interrupt bits */
#define MII_DP83869_MICR_AN_ERR_INT_EN BIT(15)
#define MII_DP83869_MICR_SPEED_CHNG_INT_EN BIT(14)
#define MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN BIT(13)
#define MII_DP83869_MICR_PAGE_RXD_INT_EN BIT(12)
#define MII_DP83869_MICR_AUTONEG_COMP_INT_EN BIT(11)
#define MII_DP83869_MICR_LINK_STS_CHNG_INT_EN BIT(10)
#define MII_DP83869_MICR_FALSE_CARRIER_INT_EN BIT(8)
#define MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
#define MII_DP83869_MICR_WOL_INT_EN BIT(3)
#define MII_DP83869_MICR_XGMII_ERR_INT_EN BIT(2)
#define MII_DP83869_MICR_POL_CHNG_INT_EN BIT(1)
#define MII_DP83869_MICR_JABBER_INT_EN BIT(0)
#define MII_DP83869_BMCR_DEFAULT (BMCR_ANENABLE | \
BMCR_FULLDPLX | \
BMCR_SPEED1000)
#define MII_DP83869_FIBER_ADVERTISE (ADVERTISED_FIBRE | \
ADVERTISED_Pause | \
ADVERTISED_Asym_Pause)
/* This is the same bit mask as the BMCR so re-use the BMCR default */
#define DP83869_FX_CTRL_DEFAULT MII_DP83869_BMCR_DEFAULT
/* CFG1 bits */
#define DP83869_CFG1_DEFAULT (ADVERTISE_1000HALF | \
ADVERTISE_1000FULL | \
CTL1000_AS_MASTER)
/* RGMIICTL bits */
#define DP83869_RGMII_TX_CLK_DELAY_EN BIT(1)
#define DP83869_RGMII_RX_CLK_DELAY_EN BIT(0)
/* RGMIIDCTL */
#define DP83869_RGMII_CLK_DELAY_SHIFT 4
#define DP83869_CLK_DELAY_DEF 7
/* STRAP_STS1 bits */
#define DP83869_STRAP_OP_MODE_MASK GENMASK(2, 0)
#define DP83869_STRAP_STS1_RESERVED BIT(11)
#define DP83869_STRAP_MIRROR_ENABLED BIT(12)
/* PHYCTRL bits */
#define DP83869_RX_FIFO_SHIFT 12
#define DP83869_TX_FIFO_SHIFT 14
/* PHY_CTRL lower bytes 0x48 are declared as reserved */
#define DP83869_PHY_CTRL_DEFAULT 0x48
#define DP83869_PHYCR_FIFO_DEPTH_MASK GENMASK(15, 12)
#define DP83869_PHYCR_RESERVED_MASK BIT(11)
/* IO_MUX_CFG bits */
#define DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL 0x1f
#define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0
#define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f
#define DP83869_IO_MUX_CFG_CLK_O_SEL_MASK (0x1f << 8)
#define DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT 8
/* CFG3 bits */
#define DP83869_CFG3_PORT_MIRROR_EN BIT(0)
/* CFG4 bits */
#define DP83869_INT_OE BIT(7)
/* OP MODE */
#define DP83869_OP_MODE_MII BIT(5)
#define DP83869_SGMII_RGMII_BRIDGE BIT(6)
/* RXFCFG bits*/
#define DP83869_WOL_MAGIC_EN BIT(0)
#define DP83869_WOL_PATTERN_EN BIT(1)
#define DP83869_WOL_BCAST_EN BIT(2)
#define DP83869_WOL_UCAST_EN BIT(4)
#define DP83869_WOL_SEC_EN BIT(5)
#define DP83869_WOL_ENH_MAC BIT(7)
/* CFG2 bits */
#define DP83869_DOWNSHIFT_EN (BIT(8) | BIT(9))
#define DP83869_DOWNSHIFT_ATTEMPT_MASK (BIT(10) | BIT(11))
#define DP83869_DOWNSHIFT_1_COUNT_VAL 0
#define DP83869_DOWNSHIFT_2_COUNT_VAL 1
#define DP83869_DOWNSHIFT_4_COUNT_VAL 2
#define DP83869_DOWNSHIFT_8_COUNT_VAL 3
#define DP83869_DOWNSHIFT_1_COUNT 1
#define DP83869_DOWNSHIFT_2_COUNT 2
#define DP83869_DOWNSHIFT_4_COUNT 4
#define DP83869_DOWNSHIFT_8_COUNT 8
enum {
DP83869_PORT_MIRRORING_KEEP,
DP83869_PORT_MIRRORING_EN,
DP83869_PORT_MIRRORING_DIS,
};
struct dp83869_private {
int tx_fifo_depth;
int rx_fifo_depth;
s32 rx_int_delay;
s32 tx_int_delay;
int io_impedance;
int port_mirroring;
bool rxctrl_strap_quirk;
int clk_output_sel;
int mode;
};
static int dp83869_read_status(struct phy_device *phydev)
{
struct dp83869_private *dp83869 = phydev->priv;
int ret;
ret = genphy_read_status(phydev);
if (ret)
return ret;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported)) {
if (phydev->link) {
if (dp83869->mode == DP83869_RGMII_100_BASE)
phydev->speed = SPEED_100;
} else {
phydev->speed = SPEED_UNKNOWN;
phydev->duplex = DUPLEX_UNKNOWN;
}
}
return 0;
}
static int dp83869_ack_interrupt(struct phy_device *phydev)
{
int err = phy_read(phydev, MII_DP83869_ISR);
if (err < 0)
return err;
return 0;
}
static int dp83869_config_intr(struct phy_device *phydev)
{
int micr_status = 0, err;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
err = dp83869_ack_interrupt(phydev);
if (err)
return err;
micr_status = phy_read(phydev, MII_DP83869_MICR);
if (micr_status < 0)
return micr_status;
micr_status |=
(MII_DP83869_MICR_AN_ERR_INT_EN |
MII_DP83869_MICR_SPEED_CHNG_INT_EN |
MII_DP83869_MICR_AUTONEG_COMP_INT_EN |
MII_DP83869_MICR_LINK_STS_CHNG_INT_EN |
MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN |
MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN);
err = phy_write(phydev, MII_DP83869_MICR, micr_status);
} else {
err = phy_write(phydev, MII_DP83869_MICR, micr_status);
if (err)
return err;
err = dp83869_ack_interrupt(phydev);
}
return err;
}
static irqreturn_t dp83869_handle_interrupt(struct phy_device *phydev)
{
int irq_status, irq_enabled;
irq_status = phy_read(phydev, MII_DP83869_ISR);
if (irq_status < 0) {
phy_error(phydev);
return IRQ_NONE;
}
irq_enabled = phy_read(phydev, MII_DP83869_MICR);
if (irq_enabled < 0) {
phy_error(phydev);
return IRQ_NONE;
}
if (!(irq_status & irq_enabled))
return IRQ_NONE;
phy_trigger_machine(phydev);
return IRQ_HANDLED;
}
static int dp83869_set_wol(struct phy_device *phydev,
struct ethtool_wolinfo *wol)
{
struct net_device *ndev = phydev->attached_dev;
int val_rxcfg, val_micr;
const u8 *mac;
int ret;
val_rxcfg = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
if (val_rxcfg < 0)
return val_rxcfg;
val_micr = phy_read(phydev, MII_DP83869_MICR);
if (val_micr < 0)
return val_micr;
if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_UCAST |
WAKE_BCAST)) {
val_rxcfg |= DP83869_WOL_ENH_MAC;
val_micr |= MII_DP83869_MICR_WOL_INT_EN;
if (wol->wolopts & WAKE_MAGIC ||
wol->wolopts & WAKE_MAGICSECURE) {
mac = (const u8 *)ndev->dev_addr;
if (!is_valid_ether_addr(mac))
return -EINVAL;
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFPMD1,
mac[1] << 8 | mac[0]);
if (ret)
return ret;
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFPMD2,
mac[3] << 8 | mac[2]);
if (ret)
return ret;
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFPMD3,
mac[5] << 8 | mac[4]);
if (ret)
return ret;
val_rxcfg |= DP83869_WOL_MAGIC_EN;
} else {
val_rxcfg &= ~DP83869_WOL_MAGIC_EN;
}
if (wol->wolopts & WAKE_MAGICSECURE) {
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFSOP1,
(wol->sopass[1] << 8) | wol->sopass[0]);
if (ret)
return ret;
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFSOP2,
(wol->sopass[3] << 8) | wol->sopass[2]);
if (ret)
return ret;
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFSOP3,
(wol->sopass[5] << 8) | wol->sopass[4]);
if (ret)
return ret;
val_rxcfg |= DP83869_WOL_SEC_EN;
} else {
val_rxcfg &= ~DP83869_WOL_SEC_EN;
}
if (wol->wolopts & WAKE_UCAST)
val_rxcfg |= DP83869_WOL_UCAST_EN;
else
val_rxcfg &= ~DP83869_WOL_UCAST_EN;
if (wol->wolopts & WAKE_BCAST)
val_rxcfg |= DP83869_WOL_BCAST_EN;
else
val_rxcfg &= ~DP83869_WOL_BCAST_EN;
} else {
val_rxcfg &= ~DP83869_WOL_ENH_MAC;
val_micr &= ~MII_DP83869_MICR_WOL_INT_EN;
}
ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG, val_rxcfg);
if (ret)
return ret;
return phy_write(phydev, MII_DP83869_MICR, val_micr);
}
static void dp83869_get_wol(struct phy_device *phydev,
struct ethtool_wolinfo *wol)
{
int value, sopass_val;
wol->supported = (WAKE_UCAST | WAKE_BCAST | WAKE_MAGIC |
WAKE_MAGICSECURE);
wol->wolopts = 0;
value = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
if (value < 0) {
phydev_err(phydev, "Failed to read RX CFG\n");
return;
}
if (value & DP83869_WOL_UCAST_EN)
wol->wolopts |= WAKE_UCAST;
if (value & DP83869_WOL_BCAST_EN)
wol->wolopts |= WAKE_BCAST;
if (value & DP83869_WOL_MAGIC_EN)
wol->wolopts |= WAKE_MAGIC;
if (value & DP83869_WOL_SEC_EN) {
sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFSOP1);
if (sopass_val < 0) {
phydev_err(phydev, "Failed to read RX SOP 1\n");
return;
}
wol->sopass[0] = (sopass_val & 0xff);
wol->sopass[1] = (sopass_val >> 8);
sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFSOP2);
if (sopass_val < 0) {
phydev_err(phydev, "Failed to read RX SOP 2\n");
return;
}
wol->sopass[2] = (sopass_val & 0xff);
wol->sopass[3] = (sopass_val >> 8);
sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
DP83869_RXFSOP3);
if (sopass_val < 0) {
phydev_err(phydev, "Failed to read RX SOP 3\n");
return;
}
wol->sopass[4] = (sopass_val & 0xff);
wol->sopass[5] = (sopass_val >> 8);
wol->wolopts |= WAKE_MAGICSECURE;
}
if (!(value & DP83869_WOL_ENH_MAC))
wol->wolopts = 0;
}
static int dp83869_get_downshift(struct phy_device *phydev, u8 *data)
{
int val, cnt, enable, count;
val = phy_read(phydev, DP83869_CFG2);
if (val < 0)
return val;
enable = FIELD_GET(DP83869_DOWNSHIFT_EN, val);
cnt = FIELD_GET(DP83869_DOWNSHIFT_ATTEMPT_MASK, val);
switch (cnt) {
case DP83869_DOWNSHIFT_1_COUNT_VAL:
count = DP83869_DOWNSHIFT_1_COUNT;
break;
case DP83869_DOWNSHIFT_2_COUNT_VAL:
count = DP83869_DOWNSHIFT_2_COUNT;
break;
case DP83869_DOWNSHIFT_4_COUNT_VAL:
count = DP83869_DOWNSHIFT_4_COUNT;
break;
case DP83869_DOWNSHIFT_8_COUNT_VAL:
count = DP83869_DOWNSHIFT_8_COUNT;
break;
default:
return -EINVAL;
}
*data = enable ? count : DOWNSHIFT_DEV_DISABLE;
return 0;
}
static int dp83869_set_downshift(struct phy_device *phydev, u8 cnt)
{
int val, count;
if (cnt > DP83869_DOWNSHIFT_8_COUNT)
return -EINVAL;
if (!cnt)
return phy_clear_bits(phydev, DP83869_CFG2,
DP83869_DOWNSHIFT_EN);
switch (cnt) {
case DP83869_DOWNSHIFT_1_COUNT:
count = DP83869_DOWNSHIFT_1_COUNT_VAL;
break;
case DP83869_DOWNSHIFT_2_COUNT:
count = DP83869_DOWNSHIFT_2_COUNT_VAL;
break;
case DP83869_DOWNSHIFT_4_COUNT:
count = DP83869_DOWNSHIFT_4_COUNT_VAL;
break;
case DP83869_DOWNSHIFT_8_COUNT:
count = DP83869_DOWNSHIFT_8_COUNT_VAL;
break;
default:
phydev_err(phydev,
"Downshift count must be 1, 2, 4 or 8\n");
return -EINVAL;
}
val = DP83869_DOWNSHIFT_EN;
val |= FIELD_PREP(DP83869_DOWNSHIFT_ATTEMPT_MASK, count);
return phy_modify(phydev, DP83869_CFG2,
DP83869_DOWNSHIFT_EN | DP83869_DOWNSHIFT_ATTEMPT_MASK,
val);
}
static int dp83869_get_tunable(struct phy_device *phydev,
struct ethtool_tunable *tuna, void *data)
{
switch (tuna->id) {
case ETHTOOL_PHY_DOWNSHIFT:
return dp83869_get_downshift(phydev, data);
default:
return -EOPNOTSUPP;
}
}
static int dp83869_set_tunable(struct phy_device *phydev,
struct ethtool_tunable *tuna, const void *data)
{
switch (tuna->id) {
case ETHTOOL_PHY_DOWNSHIFT:
return dp83869_set_downshift(phydev, *(const u8 *)data);
default:
return -EOPNOTSUPP;
}
}
static int dp83869_config_port_mirroring(struct phy_device *phydev)
{
struct dp83869_private *dp83869 = phydev->priv;
if (dp83869->port_mirroring == DP83869_PORT_MIRRORING_EN)
return phy_set_bits_mmd(phydev, DP83869_DEVADDR,
DP83869_GEN_CFG3,
DP83869_CFG3_PORT_MIRROR_EN);
else
return phy_clear_bits_mmd(phydev, DP83869_DEVADDR,
DP83869_GEN_CFG3,
DP83869_CFG3_PORT_MIRROR_EN);
}
static int dp83869_set_strapped_mode(struct phy_device *phydev)
{
struct dp83869_private *dp83869 = phydev->priv;
int val;
val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
if (val < 0)
return val;
dp83869->mode = val & DP83869_STRAP_OP_MODE_MASK;
return 0;
}
#if IS_ENABLED(CONFIG_OF_MDIO)
static const int dp83869_internal_delay[] = {250, 500, 750, 1000, 1250, 1500,
1750, 2000, 2250, 2500, 2750, 3000,
3250, 3500, 3750, 4000};
static int dp83869_of_init(struct phy_device *phydev)
{
struct dp83869_private *dp83869 = phydev->priv;
struct device *dev = &phydev->mdio.dev;
struct device_node *of_node = dev->of_node;
int delay_size = ARRAY_SIZE(dp83869_internal_delay);
int ret;
if (!of_node)
return -ENODEV;
dp83869->io_impedance = -EINVAL;
/* Optional configuration */
ret = of_property_read_u32(of_node, "ti,clk-output-sel",
&dp83869->clk_output_sel);
if (ret || dp83869->clk_output_sel > DP83869_CLK_O_SEL_REF_CLK)
dp83869->clk_output_sel = DP83869_CLK_O_SEL_REF_CLK;
ret = of_property_read_u32(of_node, "ti,op-mode", &dp83869->mode);
if (ret == 0) {
if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
return -EINVAL;
} else {
ret = dp83869_set_strapped_mode(phydev);
if (ret)
return ret;
}
if (of_property_read_bool(of_node, "ti,max-output-impedance"))
dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX;
else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN;
if (of_property_read_bool(of_node, "enet-phy-lane-swap")) {
dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
} else {
/* If the lane swap is not in the DT then check the straps */
ret = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
if (ret < 0)
return ret;
if (ret & DP83869_STRAP_MIRROR_ENABLED)
dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
else
dp83869->port_mirroring = DP83869_PORT_MIRRORING_DIS;
ret = 0;
}
if (of_property_read_u32(of_node, "rx-fifo-depth",
&dp83869->rx_fifo_depth))
dp83869->rx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;
if (of_property_read_u32(of_node, "tx-fifo-depth",
&dp83869->tx_fifo_depth))
dp83869->tx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;
dp83869->rx_int_delay = phy_get_internal_delay(phydev, dev,
&dp83869_internal_delay[0],
delay_size, true);
if (dp83869->rx_int_delay < 0)
dp83869->rx_int_delay = DP83869_CLK_DELAY_DEF;
dp83869->tx_int_delay = phy_get_internal_delay(phydev, dev,
&dp83869_internal_delay[0],
delay_size, false);
if (dp83869->tx_int_delay < 0)
dp83869->tx_int_delay = DP83869_CLK_DELAY_DEF;
return ret;
}
#else
static int dp83869_of_init(struct phy_device *phydev)
{
return dp83869_set_strapped_mode(phydev);
}
#endif /* CONFIG_OF_MDIO */
static int dp83869_configure_rgmii(struct phy_device *phydev,
struct dp83869_private *dp83869)
{
int ret = 0, val;
if (phy_interface_is_rgmii(phydev)) {
val = phy_read(phydev, MII_DP83869_PHYCTRL);
if (val < 0)
return val;
val &= ~DP83869_PHYCR_FIFO_DEPTH_MASK;
val |= (dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT);
val |= (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT);
ret = phy_write(phydev, MII_DP83869_PHYCTRL, val);
if (ret)
return ret;
}
if (dp83869->io_impedance >= 0)
ret = phy_modify_mmd(phydev, DP83869_DEVADDR,
DP83869_IO_MUX_CFG,
DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL,
dp83869->io_impedance &
DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL);
return ret;
}
static int dp83869_configure_fiber(struct phy_device *phydev,
struct dp83869_private *dp83869)
{
int bmcr;
int ret;
/* Only allow advertising what this PHY supports */
linkmode_and(phydev->advertising, phydev->advertising,
phydev->supported);
linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported);
linkmode_set_bit(ADVERTISED_FIBRE, phydev->advertising);
if (dp83869->mode == DP83869_RGMII_1000_BASE) {
linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
phydev->supported);
} else {
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
phydev->supported);
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
phydev->supported);
/* Auto neg is not supported in 100base FX mode */
bmcr = phy_read(phydev, MII_BMCR);
if (bmcr < 0)
return bmcr;
phydev->autoneg = AUTONEG_DISABLE;
linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);
if (bmcr & BMCR_ANENABLE) {
ret = phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
if (ret < 0)
return ret;
}
}
/* Update advertising from supported */
linkmode_or(phydev->advertising, phydev->advertising,
phydev->supported);
return 0;
}
static int dp83869_configure_mode(struct phy_device *phydev,
struct dp83869_private *dp83869)
{
int phy_ctrl_val;
int ret;
if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
return -EINVAL;
/* Below init sequence for each operational mode is defined in
* section 9.4.8 of the datasheet.
*/
phy_ctrl_val = dp83869->mode;
if (phydev->interface == PHY_INTERFACE_MODE_MII) {
if (dp83869->mode == DP83869_100M_MEDIA_CONVERT ||
dp83869->mode == DP83869_RGMII_100_BASE) {
phy_ctrl_val |= DP83869_OP_MODE_MII;
} else {
phydev_err(phydev, "selected op-mode is not valid with MII mode\n");
return -EINVAL;
}
}
ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
phy_ctrl_val);
if (ret)
return ret;
ret = phy_write(phydev, MII_BMCR, MII_DP83869_BMCR_DEFAULT);
if (ret)
return ret;
phy_ctrl_val = (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT |
dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT |
DP83869_PHY_CTRL_DEFAULT);
switch (dp83869->mode) {
case DP83869_RGMII_COPPER_ETHERNET:
ret = phy_write(phydev, MII_DP83869_PHYCTRL,
phy_ctrl_val);
if (ret)
return ret;
ret = phy_write(phydev, MII_CTRL1000, DP83869_CFG1_DEFAULT);
if (ret)
return ret;
ret = dp83869_configure_rgmii(phydev, dp83869);
if (ret)
return ret;
break;
case DP83869_RGMII_SGMII_BRIDGE:
ret = phy_modify_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
DP83869_SGMII_RGMII_BRIDGE,
DP83869_SGMII_RGMII_BRIDGE);
if (ret)
return ret;
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
if (ret)
return ret;
break;
case DP83869_1000M_MEDIA_CONVERT:
ret = phy_write(phydev, MII_DP83869_PHYCTRL,
phy_ctrl_val);
if (ret)
return ret;
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
if (ret)
return ret;
break;
case DP83869_100M_MEDIA_CONVERT:
ret = phy_write(phydev, MII_DP83869_PHYCTRL,
phy_ctrl_val);
if (ret)
return ret;
break;
case DP83869_SGMII_COPPER_ETHERNET:
ret = phy_write(phydev, MII_DP83869_PHYCTRL,
phy_ctrl_val);
if (ret)
return ret;
ret = phy_write(phydev, MII_CTRL1000, DP83869_CFG1_DEFAULT);
if (ret)
return ret;
ret = phy_write_mmd(phydev, DP83869_DEVADDR,
DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
if (ret)
return ret;
break;
case DP83869_RGMII_1000_BASE:
case DP83869_RGMII_100_BASE:
ret = dp83869_configure_fiber(phydev, dp83869);
break;
default:
return -EINVAL;
}
return ret;
}
static int dp83869_config_init(struct phy_device *phydev)
{
struct dp83869_private *dp83869 = phydev->priv;
int ret, val;
/* Force speed optimization for the PHY even if it strapped */
ret = phy_modify(phydev, DP83869_CFG2, DP83869_DOWNSHIFT_EN,
DP83869_DOWNSHIFT_EN);
if (ret)
return ret;
ret = dp83869_configure_mode(phydev, dp83869);
if (ret)
return ret;
/* Enable Interrupt output INT_OE in CFG4 register */
if (phy_interrupt_is_valid(phydev)) {
val = phy_read(phydev, DP83869_CFG4);
val |= DP83869_INT_OE;
phy_write(phydev, DP83869_CFG4, val);
}
if (dp83869->port_mirroring != DP83869_PORT_MIRRORING_KEEP)
dp83869_config_port_mirroring(phydev);
/* Clock output selection if muxing property is set */
if (dp83869->clk_output_sel != DP83869_CLK_O_SEL_REF_CLK)
ret = phy_modify_mmd(phydev,
DP83869_DEVADDR, DP83869_IO_MUX_CFG,
DP83869_IO_MUX_CFG_CLK_O_SEL_MASK,
dp83869->clk_output_sel <<
DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT);
if (phy_interface_is_rgmii(phydev)) {
ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIIDCTL,
dp83869->rx_int_delay |
dp83869->tx_int_delay << DP83869_RGMII_CLK_DELAY_SHIFT);
if (ret)
return ret;
val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL);
val |= (DP83869_RGMII_TX_CLK_DELAY_EN |
DP83869_RGMII_RX_CLK_DELAY_EN);
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
val &= ~(DP83869_RGMII_TX_CLK_DELAY_EN |
DP83869_RGMII_RX_CLK_DELAY_EN);
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
val &= ~DP83869_RGMII_TX_CLK_DELAY_EN;
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
val &= ~DP83869_RGMII_RX_CLK_DELAY_EN;
ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL,
val);
}
return ret;
}
static int dp83869_probe(struct phy_device *phydev)
{
struct dp83869_private *dp83869;
int ret;
dp83869 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83869),
GFP_KERNEL);
if (!dp83869)
return -ENOMEM;
phydev->priv = dp83869;
ret = dp83869_of_init(phydev);
if (ret)
return ret;
if (dp83869->mode == DP83869_RGMII_100_BASE ||
dp83869->mode == DP83869_RGMII_1000_BASE)
phydev->port = PORT_FIBRE;
return dp83869_config_init(phydev);
}
static int dp83869_phy_reset(struct phy_device *phydev)
{
int ret;
ret = phy_write(phydev, DP83869_CTRL, DP83869_SW_RESET);
if (ret < 0)
return ret;
usleep_range(10, 20);
/* Global sw reset sets all registers to default.
* Need to set the registers in the PHY to the right config.
*/
return dp83869_config_init(phydev);
}
#define DP83869_PHY_DRIVER(_id, _name) \
{ \
PHY_ID_MATCH_MODEL(_id), \
.name = (_name), \
.probe = dp83869_probe, \
.config_init = dp83869_config_init, \
.soft_reset = dp83869_phy_reset, \
.config_intr = dp83869_config_intr, \
.handle_interrupt = dp83869_handle_interrupt, \
.read_status = dp83869_read_status, \
.get_tunable = dp83869_get_tunable, \
.set_tunable = dp83869_set_tunable, \
.get_wol = dp83869_get_wol, \
.set_wol = dp83869_set_wol, \
.suspend = genphy_suspend, \
.resume = genphy_resume, \
}
static struct phy_driver dp83869_driver[] = {
DP83869_PHY_DRIVER(DP83869_PHY_ID, "TI DP83869"),
DP83869_PHY_DRIVER(DP83561_PHY_ID, "TI DP83561-SP"),
};
module_phy_driver(dp83869_driver);
static struct mdio_device_id __maybe_unused dp83869_tbl[] = {
{ PHY_ID_MATCH_MODEL(DP83869_PHY_ID) },
{ PHY_ID_MATCH_MODEL(DP83561_PHY_ID) },
{ }
};
MODULE_DEVICE_TABLE(mdio, dp83869_tbl);
MODULE_DESCRIPTION("Texas Instruments DP83869 PHY driver");
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
MODULE_LICENSE("GPL v2");
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