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linux/drivers/net/phy/dp83822.c
Russell King (Oracle) c4688ff47f net: phy: simplify phy_get_internal_delay() 
Simplify the arguments passed to phy_get_internal_delay() - the "dev"
argument is always &phydev->mdio.dev, and as the phydev is passed in,
there's no need to also pass in the struct device, especially when this
function is the only reason for the caller to have a local "dev"
variable.

Remove the redundant "dev" argument, and update the callers.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/E1uPLwB-003VzR-4C@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-12 18:23:54 -07:00

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// SPDX-License-Identifier: GPL-2.0
/* Driver for the Texas Instruments DP83822, DP83825 and DP83826 PHYs.
*
* Copyright (C) 2017 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/netdevice.h>
#include <linux/bitfield.h>
#define DP83822_PHY_ID 0x2000a240
#define DP83825S_PHY_ID 0x2000a140
#define DP83825I_PHY_ID 0x2000a150
#define DP83825CM_PHY_ID 0x2000a160
#define DP83825CS_PHY_ID 0x2000a170
#define DP83826C_PHY_ID 0x2000a130
#define DP83826NC_PHY_ID 0x2000a110
#define MII_DP83822_CTRL_2 0x0a
#define MII_DP83822_PHYSTS 0x10
#define MII_DP83822_PHYSCR 0x11
#define MII_DP83822_MISR1 0x12
#define MII_DP83822_MISR2 0x13
#define MII_DP83822_FCSCR 0x14
#define MII_DP83822_RCSR 0x17
#define MII_DP83822_RESET_CTRL 0x1f
#define MII_DP83822_MLEDCR 0x25
#define MII_DP83822_LDCTRL 0x403
#define MII_DP83822_LEDCFG1 0x460
#define MII_DP83822_IOCTRL 0x461
#define MII_DP83822_IOCTRL1 0x462
#define MII_DP83822_IOCTRL2 0x463
#define MII_DP83822_GENCFG 0x465
#define MII_DP83822_SOR1 0x467
/* DP83826 specific registers */
#define MII_DP83826_VOD_CFG1 0x30b
#define MII_DP83826_VOD_CFG2 0x30c
/* GENCFG */
#define DP83822_SIG_DET_LOW BIT(0)
/* Control Register 2 bits */
#define DP83822_FX_ENABLE BIT(14)
#define DP83822_SW_RESET BIT(15)
#define DP83822_DIG_RESTART BIT(14)
/* PHY STS bits */
#define DP83822_PHYSTS_DUPLEX BIT(2)
#define DP83822_PHYSTS_10 BIT(1)
#define DP83822_PHYSTS_LINK BIT(0)
/* PHYSCR Register Fields */
#define DP83822_PHYSCR_INT_OE BIT(0) /* Interrupt Output Enable */
#define DP83822_PHYSCR_INTEN BIT(1) /* Interrupt Enable */
/* MISR1 bits */
#define DP83822_RX_ERR_HF_INT_EN BIT(0)
#define DP83822_FALSE_CARRIER_HF_INT_EN BIT(1)
#define DP83822_ANEG_COMPLETE_INT_EN BIT(2)
#define DP83822_DUP_MODE_CHANGE_INT_EN BIT(3)
#define DP83822_SPEED_CHANGED_INT_EN BIT(4)
#define DP83822_LINK_STAT_INT_EN BIT(5)
#define DP83822_ENERGY_DET_INT_EN BIT(6)
#define DP83822_LINK_QUAL_INT_EN BIT(7)
/* MISR2 bits */
#define DP83822_JABBER_DET_INT_EN BIT(0)
#define DP83822_WOL_PKT_INT_EN BIT(1)
#define DP83822_SLEEP_MODE_INT_EN BIT(2)
#define DP83822_MDI_XOVER_INT_EN BIT(3)
#define DP83822_LB_FIFO_INT_EN BIT(4)
#define DP83822_PAGE_RX_INT_EN BIT(5)
#define DP83822_ANEG_ERR_INT_EN BIT(6)
#define DP83822_EEE_ERROR_CHANGE_INT_EN BIT(7)
/* INT_STAT1 bits */
#define DP83822_WOL_INT_EN BIT(4)
#define DP83822_WOL_INT_STAT BIT(12)
#define MII_DP83822_RXSOP1 0x04a5
#define MII_DP83822_RXSOP2 0x04a6
#define MII_DP83822_RXSOP3 0x04a7
/* WoL Registers */
#define MII_DP83822_WOL_CFG 0x04a0
#define MII_DP83822_WOL_STAT 0x04a1
#define MII_DP83822_WOL_DA1 0x04a2
#define MII_DP83822_WOL_DA2 0x04a3
#define MII_DP83822_WOL_DA3 0x04a4
/* WoL bits */
#define DP83822_WOL_MAGIC_EN BIT(0)
#define DP83822_WOL_SECURE_ON BIT(5)
#define DP83822_WOL_EN BIT(7)
#define DP83822_WOL_INDICATION_SEL BIT(8)
#define DP83822_WOL_CLR_INDICATION BIT(11)
/* RCSR bits */
#define DP83822_RMII_MODE_EN BIT(5)
#define DP83822_RMII_MODE_SEL BIT(7)
#define DP83822_RGMII_MODE_EN BIT(9)
#define DP83822_RX_CLK_SHIFT BIT(12)
#define DP83822_TX_CLK_SHIFT BIT(11)
/* MLEDCR bits */
#define DP83822_MLEDCR_CFG GENMASK(6, 3)
#define DP83822_MLEDCR_ROUTE GENMASK(1, 0)
#define DP83822_MLEDCR_ROUTE_LED_0 DP83822_MLEDCR_ROUTE
/* LEDCFG1 bits */
#define DP83822_LEDCFG1_LED1_CTRL GENMASK(11, 8)
#define DP83822_LEDCFG1_LED3_CTRL GENMASK(7, 4)
/* IOCTRL bits */
#define DP83822_IOCTRL_MAC_IMPEDANCE_CTRL GENMASK(4, 1)
/* IOCTRL1 bits */
#define DP83822_IOCTRL1_GPIO3_CTRL GENMASK(10, 8)
#define DP83822_IOCTRL1_GPIO3_CTRL_LED3 BIT(0)
#define DP83822_IOCTRL1_GPIO1_CTRL GENMASK(2, 0)
#define DP83822_IOCTRL1_GPIO1_CTRL_LED_1 BIT(0)
/* LDCTRL bits */
#define DP83822_100BASE_TX_LINE_DRIVER_SWING GENMASK(7, 4)
/* IOCTRL2 bits */
#define DP83822_IOCTRL2_GPIO2_CLK_SRC GENMASK(6, 4)
#define DP83822_IOCTRL2_GPIO2_CTRL GENMASK(2, 0)
#define DP83822_IOCTRL2_GPIO2_CTRL_CLK_REF GENMASK(1, 0)
#define DP83822_IOCTRL2_GPIO2_CTRL_MLED BIT(0)
#define DP83822_CLK_SRC_MAC_IF 0x0
#define DP83822_CLK_SRC_XI 0x1
#define DP83822_CLK_SRC_INT_REF 0x2
#define DP83822_CLK_SRC_RMII_MASTER_MODE_REF 0x4
#define DP83822_CLK_SRC_FREE_RUNNING 0x6
#define DP83822_CLK_SRC_RECOVERED 0x7
#define DP83822_LED_FN_LINK 0x0 /* Link established */
#define DP83822_LED_FN_RX_TX 0x1 /* Receive or Transmit activity */
#define DP83822_LED_FN_TX 0x2 /* Transmit activity */
#define DP83822_LED_FN_RX 0x3 /* Receive activity */
#define DP83822_LED_FN_COLLISION 0x4 /* Collision detected */
#define DP83822_LED_FN_LINK_100_BTX 0x5 /* 100 BTX link established */
#define DP83822_LED_FN_LINK_10_BT 0x6 /* 10BT link established */
#define DP83822_LED_FN_FULL_DUPLEX 0x7 /* Full duplex */
#define DP83822_LED_FN_LINK_RX_TX 0x8 /* Link established, blink for rx or tx activity */
#define DP83822_LED_FN_ACTIVE_STRETCH 0x9 /* Active Stretch Signal */
#define DP83822_LED_FN_MII_LINK 0xa /* MII LINK (100BT+FD) */
#define DP83822_LED_FN_LPI_MODE 0xb /* LPI Mode (EEE) */
#define DP83822_LED_FN_RX_TX_ERR 0xc /* TX/RX MII Error */
#define DP83822_LED_FN_LINK_LOST 0xd /* Link Lost */
#define DP83822_LED_FN_PRBS_ERR 0xe /* Blink for PRBS error */
/* SOR1 mode */
#define DP83822_STRAP_MODE1 0
#define DP83822_STRAP_MODE2 BIT(0)
#define DP83822_STRAP_MODE3 BIT(1)
#define DP83822_STRAP_MODE4 GENMASK(1, 0)
#define DP83822_COL_STRAP_MASK GENMASK(11, 10)
#define DP83822_COL_SHIFT 10
#define DP83822_RX_ER_STR_MASK GENMASK(9, 8)
#define DP83822_RX_ER_SHIFT 8
/* DP83826: VOD_CFG1 & VOD_CFG2 */
#define DP83826_VOD_CFG1_MINUS_MDIX_MASK GENMASK(13, 12)
#define DP83826_VOD_CFG1_MINUS_MDI_MASK GENMASK(11, 6)
#define DP83826_VOD_CFG2_MINUS_MDIX_MASK GENMASK(15, 12)
#define DP83826_VOD_CFG2_PLUS_MDIX_MASK GENMASK(11, 6)
#define DP83826_VOD_CFG2_PLUS_MDI_MASK GENMASK(5, 0)
#define DP83826_CFG_DAC_MINUS_MDIX_5_TO_4 GENMASK(5, 4)
#define DP83826_CFG_DAC_MINUS_MDIX_3_TO_0 GENMASK(3, 0)
#define DP83826_CFG_DAC_PERCENT_PER_STEP 625
#define DP83826_CFG_DAC_PERCENT_DEFAULT 10000
#define DP83826_CFG_DAC_MINUS_DEFAULT 0x30
#define DP83826_CFG_DAC_PLUS_DEFAULT 0x10
#define MII_DP83822_FIBER_ADVERTISE (ADVERTISED_TP | ADVERTISED_MII | \
ADVERTISED_FIBRE | \
ADVERTISED_Pause | ADVERTISED_Asym_Pause)
#define DP83822_MAX_LED_PINS 4
#define DP83822_LED_INDEX_LED_0 0
#define DP83822_LED_INDEX_LED_1_GPIO1 1
#define DP83822_LED_INDEX_COL_GPIO2 2
#define DP83822_LED_INDEX_RX_D3_GPIO3 3
struct dp83822_private {
bool fx_signal_det_low;
int fx_enabled;
u16 fx_sd_enable;
u8 cfg_dac_minus;
u8 cfg_dac_plus;
struct ethtool_wolinfo wol;
bool set_gpio2_clk_out;
u32 gpio2_clk_out;
bool led_pin_enable[DP83822_MAX_LED_PINS];
int tx_amplitude_100base_tx_index;
int mac_termination_index;
};
static int dp83822_config_wol(struct phy_device *phydev,
struct ethtool_wolinfo *wol)
{
struct net_device *ndev = phydev->attached_dev;
u16 value;
const u8 *mac;
if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
mac = (const u8 *)ndev->dev_addr;
if (!is_valid_ether_addr(mac))
return -EINVAL;
/* MAC addresses start with byte 5, but stored in mac[0].
* 822 PHYs store bytes 4|5, 2|3, 0|1
*/
phy_write_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_WOL_DA1,
(mac[1] << 8) | mac[0]);
phy_write_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_WOL_DA2,
(mac[3] << 8) | mac[2]);
phy_write_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_WOL_DA3,
(mac[5] << 8) | mac[4]);
value = phy_read_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_WOL_CFG);
if (wol->wolopts & WAKE_MAGIC)
value |= DP83822_WOL_MAGIC_EN;
else
value &= ~DP83822_WOL_MAGIC_EN;
if (wol->wolopts & WAKE_MAGICSECURE) {
phy_write_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_RXSOP1,
(wol->sopass[1] << 8) | wol->sopass[0]);
phy_write_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_RXSOP2,
(wol->sopass[3] << 8) | wol->sopass[2]);
phy_write_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_RXSOP3,
(wol->sopass[5] << 8) | wol->sopass[4]);
value |= DP83822_WOL_SECURE_ON;
} else {
value &= ~DP83822_WOL_SECURE_ON;
}
/* Clear any pending WoL interrupt */
phy_read(phydev, MII_DP83822_MISR2);
value |= DP83822_WOL_EN | DP83822_WOL_INDICATION_SEL |
DP83822_WOL_CLR_INDICATION;
return phy_write_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_WOL_CFG, value);
} else {
return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_WOL_CFG,
DP83822_WOL_EN |
DP83822_WOL_MAGIC_EN |
DP83822_WOL_SECURE_ON);
}
}
static int dp83822_set_wol(struct phy_device *phydev,
struct ethtool_wolinfo *wol)
{
struct dp83822_private *dp83822 = phydev->priv;
int ret;
ret = dp83822_config_wol(phydev, wol);
if (!ret)
memcpy(&dp83822->wol, wol, sizeof(*wol));
return ret;
}
static void dp83822_get_wol(struct phy_device *phydev,
struct ethtool_wolinfo *wol)
{
int value;
u16 sopass_val;
wol->supported = (WAKE_MAGIC | WAKE_MAGICSECURE);
wol->wolopts = 0;
value = phy_read_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_WOL_CFG);
if (value & DP83822_WOL_MAGIC_EN)
wol->wolopts |= WAKE_MAGIC;
if (value & DP83822_WOL_SECURE_ON) {
sopass_val = phy_read_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_RXSOP1);
wol->sopass[0] = (sopass_val & 0xff);
wol->sopass[1] = (sopass_val >> 8);
sopass_val = phy_read_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_RXSOP2);
wol->sopass[2] = (sopass_val & 0xff);
wol->sopass[3] = (sopass_val >> 8);
sopass_val = phy_read_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_RXSOP3);
wol->sopass[4] = (sopass_val & 0xff);
wol->sopass[5] = (sopass_val >> 8);
wol->wolopts |= WAKE_MAGICSECURE;
}
/* WoL is not enabled so set wolopts to 0 */
if (!(value & DP83822_WOL_EN))
wol->wolopts = 0;
}
static int dp83822_config_intr(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
int misr_status;
int physcr_status;
int err;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
misr_status = phy_read(phydev, MII_DP83822_MISR1);
if (misr_status < 0)
return misr_status;
misr_status |= (DP83822_LINK_STAT_INT_EN |
DP83822_ENERGY_DET_INT_EN |
DP83822_LINK_QUAL_INT_EN);
if (!dp83822->fx_enabled)
misr_status |= DP83822_ANEG_COMPLETE_INT_EN |
DP83822_DUP_MODE_CHANGE_INT_EN |
DP83822_SPEED_CHANGED_INT_EN;
err = phy_write(phydev, MII_DP83822_MISR1, misr_status);
if (err < 0)
return err;
misr_status = phy_read(phydev, MII_DP83822_MISR2);
if (misr_status < 0)
return misr_status;
misr_status |= (DP83822_JABBER_DET_INT_EN |
DP83822_SLEEP_MODE_INT_EN |
DP83822_LB_FIFO_INT_EN |
DP83822_PAGE_RX_INT_EN |
DP83822_EEE_ERROR_CHANGE_INT_EN);
if (!dp83822->fx_enabled)
misr_status |= DP83822_ANEG_ERR_INT_EN |
DP83822_WOL_PKT_INT_EN;
err = phy_write(phydev, MII_DP83822_MISR2, misr_status);
if (err < 0)
return err;
physcr_status = phy_read(phydev, MII_DP83822_PHYSCR);
if (physcr_status < 0)
return physcr_status;
physcr_status |= DP83822_PHYSCR_INT_OE | DP83822_PHYSCR_INTEN;
} else {
err = phy_write(phydev, MII_DP83822_MISR1, 0);
if (err < 0)
return err;
err = phy_write(phydev, MII_DP83822_MISR2, 0);
if (err < 0)
return err;
physcr_status = phy_read(phydev, MII_DP83822_PHYSCR);
if (physcr_status < 0)
return physcr_status;
physcr_status &= ~DP83822_PHYSCR_INTEN;
}
return phy_write(phydev, MII_DP83822_PHYSCR, physcr_status);
}
static irqreturn_t dp83822_handle_interrupt(struct phy_device *phydev)
{
bool trigger_machine = false;
int irq_status;
/* The MISR1 and MISR2 registers are holding the interrupt status in
* the upper half (15:8), while the lower half (7:0) is used for
* controlling the interrupt enable state of those individual interrupt
* sources. To determine the possible interrupt sources, just read the
* MISR* register and use it directly to know which interrupts have
* been enabled previously or not.
*/
irq_status = phy_read(phydev, MII_DP83822_MISR1);
if (irq_status < 0) {
phy_error(phydev);
return IRQ_NONE;
}
if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
trigger_machine = true;
irq_status = phy_read(phydev, MII_DP83822_MISR2);
if (irq_status < 0) {
phy_error(phydev);
return IRQ_NONE;
}
if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
trigger_machine = true;
if (!trigger_machine)
return IRQ_NONE;
phy_trigger_machine(phydev);
return IRQ_HANDLED;
}
static int dp83822_read_status(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
int status = phy_read(phydev, MII_DP83822_PHYSTS);
int ctrl2;
int ret;
if (dp83822->fx_enabled) {
if (status & DP83822_PHYSTS_LINK) {
phydev->speed = SPEED_UNKNOWN;
phydev->duplex = DUPLEX_UNKNOWN;
} else {
ctrl2 = phy_read(phydev, MII_DP83822_CTRL_2);
if (ctrl2 < 0)
return ctrl2;
if (!(ctrl2 & DP83822_FX_ENABLE)) {
ret = phy_write(phydev, MII_DP83822_CTRL_2,
DP83822_FX_ENABLE | ctrl2);
if (ret < 0)
return ret;
}
}
}
ret = genphy_read_status(phydev);
if (ret)
return ret;
if (status < 0)
return status;
if (status & DP83822_PHYSTS_DUPLEX)
phydev->duplex = DUPLEX_FULL;
else
phydev->duplex = DUPLEX_HALF;
if (status & DP83822_PHYSTS_10)
phydev->speed = SPEED_10;
else
phydev->speed = SPEED_100;
return 0;
}
static int dp83822_config_init_leds(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
int ret;
if (dp83822->led_pin_enable[DP83822_LED_INDEX_LED_0]) {
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_MLEDCR,
DP83822_MLEDCR_ROUTE,
FIELD_PREP(DP83822_MLEDCR_ROUTE,
DP83822_MLEDCR_ROUTE_LED_0));
if (ret)
return ret;
} else if (dp83822->led_pin_enable[DP83822_LED_INDEX_COL_GPIO2]) {
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_IOCTRL2,
DP83822_IOCTRL2_GPIO2_CTRL,
FIELD_PREP(DP83822_IOCTRL2_GPIO2_CTRL,
DP83822_IOCTRL2_GPIO2_CTRL_MLED));
if (ret)
return ret;
}
if (dp83822->led_pin_enable[DP83822_LED_INDEX_LED_1_GPIO1]) {
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_IOCTRL1,
DP83822_IOCTRL1_GPIO1_CTRL,
FIELD_PREP(DP83822_IOCTRL1_GPIO1_CTRL,
DP83822_IOCTRL1_GPIO1_CTRL_LED_1));
if (ret)
return ret;
}
if (dp83822->led_pin_enable[DP83822_LED_INDEX_RX_D3_GPIO3]) {
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_IOCTRL1,
DP83822_IOCTRL1_GPIO3_CTRL,
FIELD_PREP(DP83822_IOCTRL1_GPIO3_CTRL,
DP83822_IOCTRL1_GPIO3_CTRL_LED3));
if (ret)
return ret;
}
return 0;
}
static int dp83822_config_init(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
int rgmii_delay = 0;
s32 rx_int_delay;
s32 tx_int_delay;
int err = 0;
int bmcr;
if (dp83822->set_gpio2_clk_out)
phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_IOCTRL2,
DP83822_IOCTRL2_GPIO2_CTRL |
DP83822_IOCTRL2_GPIO2_CLK_SRC,
FIELD_PREP(DP83822_IOCTRL2_GPIO2_CTRL,
DP83822_IOCTRL2_GPIO2_CTRL_CLK_REF) |
FIELD_PREP(DP83822_IOCTRL2_GPIO2_CLK_SRC,
dp83822->gpio2_clk_out));
if (dp83822->tx_amplitude_100base_tx_index >= 0)
phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_LDCTRL,
DP83822_100BASE_TX_LINE_DRIVER_SWING,
FIELD_PREP(DP83822_100BASE_TX_LINE_DRIVER_SWING,
dp83822->tx_amplitude_100base_tx_index));
if (dp83822->mac_termination_index >= 0)
phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_IOCTRL,
DP83822_IOCTRL_MAC_IMPEDANCE_CTRL,
FIELD_PREP(DP83822_IOCTRL_MAC_IMPEDANCE_CTRL,
dp83822->mac_termination_index));
err = dp83822_config_init_leds(phydev);
if (err)
return err;
if (phy_interface_is_rgmii(phydev)) {
rx_int_delay = phy_get_internal_delay(phydev, NULL, 0, true);
/* Set DP83822_RX_CLK_SHIFT to enable rx clk internal delay */
if (rx_int_delay > 0)
rgmii_delay |= DP83822_RX_CLK_SHIFT;
tx_int_delay = phy_get_internal_delay(phydev, NULL, 0, false);
/* Set DP83822_TX_CLK_SHIFT to disable tx clk internal delay */
if (tx_int_delay <= 0)
rgmii_delay |= DP83822_TX_CLK_SHIFT;
err = phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_RCSR,
DP83822_RX_CLK_SHIFT | DP83822_TX_CLK_SHIFT, rgmii_delay);
if (err)
return err;
err = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_RCSR, DP83822_RGMII_MODE_EN);
if (err)
return err;
} else {
err = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_RCSR, DP83822_RGMII_MODE_EN);
if (err)
return err;
}
if (dp83822->fx_enabled) {
err = phy_modify(phydev, MII_DP83822_CTRL_2,
DP83822_FX_ENABLE, 1);
if (err < 0)
return err;
/* 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(ETHTOOL_LINK_MODE_FIBRE_BIT,
phydev->advertising);
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
phydev->supported);
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
phydev->supported);
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
phydev->advertising);
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
phydev->advertising);
/* Auto neg is not supported in fiber mode */
bmcr = phy_read(phydev, MII_BMCR);
if (bmcr < 0)
return bmcr;
if (bmcr & BMCR_ANENABLE) {
err = phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
if (err < 0)
return err;
}
phydev->autoneg = AUTONEG_DISABLE;
linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
phydev->supported);
linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
phydev->advertising);
/* Setup fiber advertisement */
err = phy_modify_changed(phydev, MII_ADVERTISE,
MII_DP83822_FIBER_ADVERTISE,
MII_DP83822_FIBER_ADVERTISE);
if (err < 0)
return err;
if (dp83822->fx_signal_det_low) {
err = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_GENCFG,
DP83822_SIG_DET_LOW);
if (err)
return err;
}
}
return dp83822_config_wol(phydev, &dp83822->wol);
}
static int dp8382x_config_rmii_mode(struct phy_device *phydev)
{
struct device *dev = &phydev->mdio.dev;
const char *of_val;
int ret;
if (!device_property_read_string(dev, "ti,rmii-mode", &of_val)) {
if (strcmp(of_val, "master") == 0) {
ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_RCSR,
DP83822_RMII_MODE_SEL);
} else if (strcmp(of_val, "slave") == 0) {
ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_RCSR,
DP83822_RMII_MODE_SEL);
} else {
phydev_err(phydev, "Invalid value for ti,rmii-mode property (%s)\n",
of_val);
ret = -EINVAL;
}
if (ret)
return ret;
}
return 0;
}
static int dp83826_config_init(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
u16 val, mask;
int ret;
if (phydev->interface == PHY_INTERFACE_MODE_RMII) {
ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_RCSR,
DP83822_RMII_MODE_EN);
if (ret)
return ret;
ret = dp8382x_config_rmii_mode(phydev);
if (ret)
return ret;
} else {
ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_RCSR,
DP83822_RMII_MODE_EN);
if (ret)
return ret;
}
if (dp83822->cfg_dac_minus != DP83826_CFG_DAC_MINUS_DEFAULT) {
val = FIELD_PREP(DP83826_VOD_CFG1_MINUS_MDI_MASK, dp83822->cfg_dac_minus) |
FIELD_PREP(DP83826_VOD_CFG1_MINUS_MDIX_MASK,
FIELD_GET(DP83826_CFG_DAC_MINUS_MDIX_5_TO_4,
dp83822->cfg_dac_minus));
mask = DP83826_VOD_CFG1_MINUS_MDIX_MASK | DP83826_VOD_CFG1_MINUS_MDI_MASK;
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83826_VOD_CFG1, mask, val);
if (ret)
return ret;
val = FIELD_PREP(DP83826_VOD_CFG2_MINUS_MDIX_MASK,
FIELD_GET(DP83826_CFG_DAC_MINUS_MDIX_3_TO_0,
dp83822->cfg_dac_minus));
mask = DP83826_VOD_CFG2_MINUS_MDIX_MASK;
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83826_VOD_CFG2, mask, val);
if (ret)
return ret;
}
if (dp83822->cfg_dac_plus != DP83826_CFG_DAC_PLUS_DEFAULT) {
val = FIELD_PREP(DP83826_VOD_CFG2_PLUS_MDIX_MASK, dp83822->cfg_dac_plus) |
FIELD_PREP(DP83826_VOD_CFG2_PLUS_MDI_MASK, dp83822->cfg_dac_plus);
mask = DP83826_VOD_CFG2_PLUS_MDIX_MASK | DP83826_VOD_CFG2_PLUS_MDI_MASK;
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, MII_DP83826_VOD_CFG2, mask, val);
if (ret)
return ret;
}
return dp83822_config_wol(phydev, &dp83822->wol);
}
static int dp83825_config_init(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
int ret;
ret = dp8382x_config_rmii_mode(phydev);
if (ret)
return ret;
return dp83822_config_wol(phydev, &dp83822->wol);
}
static int dp83822_phy_reset(struct phy_device *phydev)
{
int err;
err = phy_write(phydev, MII_DP83822_RESET_CTRL, DP83822_SW_RESET);
if (err < 0)
return err;
return phydev->drv->config_init(phydev);
}
#if IS_ENABLED(CONFIG_OF_MDIO)
static const u32 tx_amplitude_100base_tx_gain[] = {
80, 82, 83, 85, 87, 88, 90, 92,
93, 95, 97, 98, 100, 102, 103, 105,
};
static const u32 mac_termination[] = {
99, 91, 84, 78, 73, 69, 65, 61, 58, 55, 53, 50, 48, 46, 44, 43,
};
static int dp83822_of_init_leds(struct phy_device *phydev)
{
struct device_node *node = phydev->mdio.dev.of_node;
struct dp83822_private *dp83822 = phydev->priv;
struct device_node *leds;
u32 index;
int err;
if (!node)
return 0;
leds = of_get_child_by_name(node, "leds");
if (!leds)
return 0;
for_each_available_child_of_node_scoped(leds, led) {
err = of_property_read_u32(led, "reg", &index);
if (err) {
of_node_put(leds);
return err;
}
if (index <= DP83822_LED_INDEX_RX_D3_GPIO3) {
dp83822->led_pin_enable[index] = true;
} else {
of_node_put(leds);
return -EINVAL;
}
}
of_node_put(leds);
/* LED_0 and COL(GPIO2) use the MLED function. MLED can be routed to
* only one of these two pins at a time.
*/
if (dp83822->led_pin_enable[DP83822_LED_INDEX_LED_0] &&
dp83822->led_pin_enable[DP83822_LED_INDEX_COL_GPIO2]) {
phydev_err(phydev, "LED_0 and COL(GPIO2) cannot be used as LED output at the same time\n");
return -EINVAL;
}
if (dp83822->led_pin_enable[DP83822_LED_INDEX_COL_GPIO2] &&
dp83822->set_gpio2_clk_out) {
phydev_err(phydev, "COL(GPIO2) cannot be used as LED output, already used as clock output\n");
return -EINVAL;
}
if (dp83822->led_pin_enable[DP83822_LED_INDEX_RX_D3_GPIO3] &&
phydev->interface != PHY_INTERFACE_MODE_RMII) {
phydev_err(phydev, "RX_D3 can only be used as LED output when in RMII mode\n");
return -EINVAL;
}
return 0;
}
static int dp83822_of_init(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
struct device *dev = &phydev->mdio.dev;
const char *of_val;
int i, ret;
u32 val;
/* Signal detection for the PHY is only enabled if the FX_EN and the
* SD_EN pins are strapped. Signal detection can only enabled if FX_EN
* is strapped otherwise signal detection is disabled for the PHY.
*/
if (dp83822->fx_enabled && dp83822->fx_sd_enable)
dp83822->fx_signal_det_low = device_property_present(dev,
"ti,link-loss-low");
if (!dp83822->fx_enabled)
dp83822->fx_enabled = device_property_present(dev,
"ti,fiber-mode");
if (!device_property_read_string(dev, "ti,gpio2-clk-out", &of_val)) {
if (strcmp(of_val, "mac-if") == 0) {
dp83822->gpio2_clk_out = DP83822_CLK_SRC_MAC_IF;
} else if (strcmp(of_val, "xi") == 0) {
dp83822->gpio2_clk_out = DP83822_CLK_SRC_XI;
} else if (strcmp(of_val, "int-ref") == 0) {
dp83822->gpio2_clk_out = DP83822_CLK_SRC_INT_REF;
} else if (strcmp(of_val, "rmii-master-mode-ref") == 0) {
dp83822->gpio2_clk_out = DP83822_CLK_SRC_RMII_MASTER_MODE_REF;
} else if (strcmp(of_val, "free-running") == 0) {
dp83822->gpio2_clk_out = DP83822_CLK_SRC_FREE_RUNNING;
} else if (strcmp(of_val, "recovered") == 0) {
dp83822->gpio2_clk_out = DP83822_CLK_SRC_RECOVERED;
} else {
phydev_err(phydev,
"Invalid value for ti,gpio2-clk-out property (%s)\n",
of_val);
return -EINVAL;
}
dp83822->set_gpio2_clk_out = true;
}
ret = phy_get_tx_amplitude_gain(phydev, dev,
ETHTOOL_LINK_MODE_100baseT_Full_BIT,
&val);
if (!ret) {
for (i = 0; i < ARRAY_SIZE(tx_amplitude_100base_tx_gain); i++) {
if (tx_amplitude_100base_tx_gain[i] == val) {
dp83822->tx_amplitude_100base_tx_index = i;
break;
}
}
if (dp83822->tx_amplitude_100base_tx_index < 0) {
phydev_err(phydev,
"Invalid value for tx-amplitude-100base-tx-percent property (%u)\n",
val);
return -EINVAL;
}
}
ret = phy_get_mac_termination(phydev, dev, &val);
if (!ret) {
for (i = 0; i < ARRAY_SIZE(mac_termination); i++) {
if (mac_termination[i] == val) {
dp83822->mac_termination_index = i;
break;
}
}
if (dp83822->mac_termination_index < 0) {
phydev_err(phydev,
"Invalid value for mac-termination-ohms property (%u)\n",
val);
return -EINVAL;
}
}
return dp83822_of_init_leds(phydev);
}
static int dp83826_to_dac_minus_one_regval(int percent)
{
int tmp = DP83826_CFG_DAC_PERCENT_DEFAULT - percent;
return tmp / DP83826_CFG_DAC_PERCENT_PER_STEP;
}
static int dp83826_to_dac_plus_one_regval(int percent)
{
int tmp = percent - DP83826_CFG_DAC_PERCENT_DEFAULT;
return tmp / DP83826_CFG_DAC_PERCENT_PER_STEP;
}
static void dp83826_of_init(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
struct device *dev = &phydev->mdio.dev;
u32 val;
dp83822->cfg_dac_minus = DP83826_CFG_DAC_MINUS_DEFAULT;
if (!device_property_read_u32(dev, "ti,cfg-dac-minus-one-bp", &val))
dp83822->cfg_dac_minus += dp83826_to_dac_minus_one_regval(val);
dp83822->cfg_dac_plus = DP83826_CFG_DAC_PLUS_DEFAULT;
if (!device_property_read_u32(dev, "ti,cfg-dac-plus-one-bp", &val))
dp83822->cfg_dac_plus += dp83826_to_dac_plus_one_regval(val);
}
#else
static int dp83822_of_init(struct phy_device *phydev)
{
return 0;
}
static void dp83826_of_init(struct phy_device *phydev)
{
}
#endif /* CONFIG_OF_MDIO */
static int dp83822_read_straps(struct phy_device *phydev)
{
struct dp83822_private *dp83822 = phydev->priv;
int fx_enabled, fx_sd_enable;
int val;
val = phy_read_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_SOR1);
if (val < 0)
return val;
phydev_dbg(phydev, "SOR1 strap register: 0x%04x\n", val);
fx_enabled = (val & DP83822_COL_STRAP_MASK) >> DP83822_COL_SHIFT;
if (fx_enabled == DP83822_STRAP_MODE2 ||
fx_enabled == DP83822_STRAP_MODE3)
dp83822->fx_enabled = 1;
if (dp83822->fx_enabled) {
fx_sd_enable = (val & DP83822_RX_ER_STR_MASK) >> DP83822_RX_ER_SHIFT;
if (fx_sd_enable == DP83822_STRAP_MODE3 ||
fx_sd_enable == DP83822_STRAP_MODE4)
dp83822->fx_sd_enable = 1;
}
return 0;
}
static int dp8382x_probe(struct phy_device *phydev)
{
struct dp83822_private *dp83822;
dp83822 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83822),
GFP_KERNEL);
if (!dp83822)
return -ENOMEM;
dp83822->tx_amplitude_100base_tx_index = -1;
dp83822->mac_termination_index = -1;
phydev->priv = dp83822;
return 0;
}
static int dp83822_probe(struct phy_device *phydev)
{
struct dp83822_private *dp83822;
int ret;
ret = dp8382x_probe(phydev);
if (ret)
return ret;
dp83822 = phydev->priv;
ret = dp83822_read_straps(phydev);
if (ret)
return ret;
ret = dp83822_of_init(phydev);
if (ret)
return ret;
if (dp83822->fx_enabled)
phydev->port = PORT_FIBRE;
return 0;
}
static int dp83826_probe(struct phy_device *phydev)
{
int ret;
ret = dp8382x_probe(phydev);
if (ret)
return ret;
dp83826_of_init(phydev);
return 0;
}
static int dp83822_suspend(struct phy_device *phydev)
{
int value;
value = phy_read_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_WOL_CFG);
if (!(value & DP83822_WOL_EN))
genphy_suspend(phydev);
return 0;
}
static int dp83822_resume(struct phy_device *phydev)
{
int value;
genphy_resume(phydev);
value = phy_read_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_WOL_CFG);
phy_write_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_WOL_CFG, value |
DP83822_WOL_CLR_INDICATION);
return 0;
}
static int dp83822_led_mode(u8 index, unsigned long rules)
{
switch (rules) {
case BIT(TRIGGER_NETDEV_LINK):
return DP83822_LED_FN_LINK;
case BIT(TRIGGER_NETDEV_LINK_10):
return DP83822_LED_FN_LINK_10_BT;
case BIT(TRIGGER_NETDEV_LINK_100):
return DP83822_LED_FN_LINK_100_BTX;
case BIT(TRIGGER_NETDEV_FULL_DUPLEX):
return DP83822_LED_FN_FULL_DUPLEX;
case BIT(TRIGGER_NETDEV_TX):
return DP83822_LED_FN_TX;
case BIT(TRIGGER_NETDEV_RX):
return DP83822_LED_FN_RX;
case BIT(TRIGGER_NETDEV_TX) | BIT(TRIGGER_NETDEV_RX):
return DP83822_LED_FN_RX_TX;
case BIT(TRIGGER_NETDEV_TX_ERR) | BIT(TRIGGER_NETDEV_RX_ERR):
return DP83822_LED_FN_RX_TX_ERR;
case BIT(TRIGGER_NETDEV_LINK) | BIT(TRIGGER_NETDEV_TX) | BIT(TRIGGER_NETDEV_RX):
return DP83822_LED_FN_LINK_RX_TX;
default:
return -EOPNOTSUPP;
}
}
static int dp83822_led_hw_is_supported(struct phy_device *phydev, u8 index,
unsigned long rules)
{
int mode;
mode = dp83822_led_mode(index, rules);
if (mode < 0)
return mode;
return 0;
}
static int dp83822_led_hw_control_set(struct phy_device *phydev, u8 index,
unsigned long rules)
{
int mode;
mode = dp83822_led_mode(index, rules);
if (mode < 0)
return mode;
if (index == DP83822_LED_INDEX_LED_0 || index == DP83822_LED_INDEX_COL_GPIO2)
return phy_modify_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_MLEDCR, DP83822_MLEDCR_CFG,
FIELD_PREP(DP83822_MLEDCR_CFG, mode));
else if (index == DP83822_LED_INDEX_LED_1_GPIO1)
return phy_modify_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_LEDCFG1,
DP83822_LEDCFG1_LED1_CTRL,
FIELD_PREP(DP83822_LEDCFG1_LED1_CTRL,
mode));
else
return phy_modify_mmd(phydev, MDIO_MMD_VEND2,
MII_DP83822_LEDCFG1,
DP83822_LEDCFG1_LED3_CTRL,
FIELD_PREP(DP83822_LEDCFG1_LED3_CTRL,
mode));
}
static int dp83822_led_hw_control_get(struct phy_device *phydev, u8 index,
unsigned long *rules)
{
int val;
if (index == DP83822_LED_INDEX_LED_0 || index == DP83822_LED_INDEX_COL_GPIO2) {
val = phy_read_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_MLEDCR);
if (val < 0)
return val;
val = FIELD_GET(DP83822_MLEDCR_CFG, val);
} else {
val = phy_read_mmd(phydev, MDIO_MMD_VEND2, MII_DP83822_LEDCFG1);
if (val < 0)
return val;
if (index == DP83822_LED_INDEX_LED_1_GPIO1)
val = FIELD_GET(DP83822_LEDCFG1_LED1_CTRL, val);
else
val = FIELD_GET(DP83822_LEDCFG1_LED3_CTRL, val);
}
switch (val) {
case DP83822_LED_FN_LINK:
*rules = BIT(TRIGGER_NETDEV_LINK);
break;
case DP83822_LED_FN_LINK_10_BT:
*rules = BIT(TRIGGER_NETDEV_LINK_10);
break;
case DP83822_LED_FN_LINK_100_BTX:
*rules = BIT(TRIGGER_NETDEV_LINK_100);
break;
case DP83822_LED_FN_FULL_DUPLEX:
*rules = BIT(TRIGGER_NETDEV_FULL_DUPLEX);
break;
case DP83822_LED_FN_TX:
*rules = BIT(TRIGGER_NETDEV_TX);
break;
case DP83822_LED_FN_RX:
*rules = BIT(TRIGGER_NETDEV_RX);
break;
case DP83822_LED_FN_RX_TX:
*rules = BIT(TRIGGER_NETDEV_TX) | BIT(TRIGGER_NETDEV_RX);
break;
case DP83822_LED_FN_RX_TX_ERR:
*rules = BIT(TRIGGER_NETDEV_TX_ERR) | BIT(TRIGGER_NETDEV_RX_ERR);
break;
case DP83822_LED_FN_LINK_RX_TX:
*rules = BIT(TRIGGER_NETDEV_LINK) | BIT(TRIGGER_NETDEV_TX) |
BIT(TRIGGER_NETDEV_RX);
break;
default:
*rules = 0;
break;
}
return 0;
}
#define DP83822_PHY_DRIVER(_id, _name) \
{ \
PHY_ID_MATCH_MODEL(_id), \
.name = (_name), \
/* PHY_BASIC_FEATURES */ \
.probe = dp83822_probe, \
.soft_reset = dp83822_phy_reset, \
.config_init = dp83822_config_init, \
.read_status = dp83822_read_status, \
.get_wol = dp83822_get_wol, \
.set_wol = dp83822_set_wol, \
.config_intr = dp83822_config_intr, \
.handle_interrupt = dp83822_handle_interrupt, \
.suspend = dp83822_suspend, \
.resume = dp83822_resume, \
.led_hw_is_supported = dp83822_led_hw_is_supported, \
.led_hw_control_set = dp83822_led_hw_control_set, \
.led_hw_control_get = dp83822_led_hw_control_get, \
}
#define DP83825_PHY_DRIVER(_id, _name) \
{ \
PHY_ID_MATCH_MODEL(_id), \
.name = (_name), \
/* PHY_BASIC_FEATURES */ \
.probe = dp8382x_probe, \
.soft_reset = dp83822_phy_reset, \
.config_init = dp83825_config_init, \
.get_wol = dp83822_get_wol, \
.set_wol = dp83822_set_wol, \
.config_intr = dp83822_config_intr, \
.handle_interrupt = dp83822_handle_interrupt, \
.suspend = dp83822_suspend, \
.resume = dp83822_resume, \
}
#define DP83826_PHY_DRIVER(_id, _name) \
{ \
PHY_ID_MATCH_MODEL(_id), \
.name = (_name), \
/* PHY_BASIC_FEATURES */ \
.probe = dp83826_probe, \
.soft_reset = dp83822_phy_reset, \
.config_init = dp83826_config_init, \
.get_wol = dp83822_get_wol, \
.set_wol = dp83822_set_wol, \
.config_intr = dp83822_config_intr, \
.handle_interrupt = dp83822_handle_interrupt, \
.suspend = dp83822_suspend, \
.resume = dp83822_resume, \
}
static struct phy_driver dp83822_driver[] = {
DP83822_PHY_DRIVER(DP83822_PHY_ID, "TI DP83822"),
DP83825_PHY_DRIVER(DP83825I_PHY_ID, "TI DP83825I"),
DP83825_PHY_DRIVER(DP83825S_PHY_ID, "TI DP83825S"),
DP83825_PHY_DRIVER(DP83825CM_PHY_ID, "TI DP83825M"),
DP83825_PHY_DRIVER(DP83825CS_PHY_ID, "TI DP83825CS"),
DP83826_PHY_DRIVER(DP83826C_PHY_ID, "TI DP83826C"),
DP83826_PHY_DRIVER(DP83826NC_PHY_ID, "TI DP83826NC"),
};
module_phy_driver(dp83822_driver);
static const struct mdio_device_id __maybe_unused dp83822_tbl[] = {
{ DP83822_PHY_ID, 0xfffffff0 },
{ DP83825I_PHY_ID, 0xfffffff0 },
{ DP83826C_PHY_ID, 0xfffffff0 },
{ DP83826NC_PHY_ID, 0xfffffff0 },
{ DP83825S_PHY_ID, 0xfffffff0 },
{ DP83825CM_PHY_ID, 0xfffffff0 },
{ DP83825CS_PHY_ID, 0xfffffff0 },
{ },
};
MODULE_DEVICE_TABLE(mdio, dp83822_tbl);
MODULE_DESCRIPTION("Texas Instruments DP83822 PHY driver");
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
MODULE_LICENSE("GPL v2");
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