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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>
#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 DP83822_DEVADDR 0x1f
#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_GENCFG 0x465
#define MII_DP83822_SOR1 0x467
/* GENCFG */
#define DP83822_SIG_DET_LOW BIT(0)
/* Control Register 2 bits */
#define DP83822_FX_ENABLE BIT(14)
#define DP83822_HW_RESET BIT(15)
#define DP83822_SW_RESET 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)
/* RSCR bits */
#define DP83822_RX_CLK_SHIFT BIT(12)
#define DP83822_TX_CLK_SHIFT BIT(11)
/* 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
#define MII_DP83822_FIBER_ADVERTISE (ADVERTISED_TP | ADVERTISED_MII | \
ADVERTISED_FIBRE | \
ADVERTISED_Pause | ADVERTISED_Asym_Pause)
struct dp83822_private {
bool fx_signal_det_low;
int fx_enabled;
u16 fx_sd_enable;
};
static int dp83822_ack_interrupt(struct phy_device *phydev)
{
int err;
err = phy_read(phydev, MII_DP83822_MISR1);
if (err < 0)
return err;
err = phy_read(phydev, MII_DP83822_MISR2);
if (err < 0)
return err;
return 0;
}
static int dp83822_set_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, DP83822_DEVADDR, MII_DP83822_WOL_DA1,
(mac[1] << 8) | mac[0]);
phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA2,
(mac[3] << 8) | mac[2]);
phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA3,
(mac[5] << 8) | mac[4]);
value = phy_read_mmd(phydev, DP83822_DEVADDR,
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, DP83822_DEVADDR,
MII_DP83822_RXSOP1,
(wol->sopass[1] << 8) | wol->sopass[0]);
phy_write_mmd(phydev, DP83822_DEVADDR,
MII_DP83822_RXSOP2,
(wol->sopass[3] << 8) | wol->sopass[2]);
phy_write_mmd(phydev, DP83822_DEVADDR,
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, DP83822_DEVADDR,
MII_DP83822_WOL_CFG, value);
} else {
return phy_clear_bits_mmd(phydev, DP83822_DEVADDR,
MII_DP83822_WOL_CFG, DP83822_WOL_EN);
}
}
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, DP83822_DEVADDR, 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, DP83822_DEVADDR,
MII_DP83822_RXSOP1);
wol->sopass[0] = (sopass_val & 0xff);
wol->sopass[1] = (sopass_val >> 8);
sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
MII_DP83822_RXSOP2);
wol->sopass[2] = (sopass_val & 0xff);
wol->sopass[3] = (sopass_val >> 8);
sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
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_RX_ERR_HF_INT_EN |
DP83822_FALSE_CARRIER_HF_INT_EN |
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_MDI_XOVER_INT_EN |
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 =
|