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linux/drivers/net/phy/microchip_t1.c
Divya Koppera b2c8a506f6 net: phy: microchip_t1: Cable Diagnostics for lan887x 
Add support for cable diagnostics in lan887x PHY.
Using this we can diagnose connected/open/short wires and
also length where cable fault is occurred.

Signed-off-by: Divya Koppera <divya.koppera@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240909114339.3446-1-divya.koppera@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-11 20:21:07 -07:00

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52 KiB
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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Microchip Technology
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/mii.h>
#include <linux/phy.h>
#include <linux/ethtool.h>
#include <linux/ethtool_netlink.h>
#include <linux/bitfield.h>
#define PHY_ID_LAN87XX 0x0007c150
#define PHY_ID_LAN937X 0x0007c180
#define PHY_ID_LAN887X 0x0007c1f0
/* External Register Control Register */
#define LAN87XX_EXT_REG_CTL (0x14)
#define LAN87XX_EXT_REG_CTL_RD_CTL (0x1000)
#define LAN87XX_EXT_REG_CTL_WR_CTL (0x0800)
#define LAN87XX_REG_BANK_SEL_MASK GENMASK(10, 8)
#define LAN87XX_REG_ADDR_MASK GENMASK(7, 0)
/* External Register Read Data Register */
#define LAN87XX_EXT_REG_RD_DATA (0x15)
/* External Register Write Data Register */
#define LAN87XX_EXT_REG_WR_DATA (0x16)
/* Interrupt Source Register */
#define LAN87XX_INTERRUPT_SOURCE (0x18)
#define LAN87XX_INTERRUPT_SOURCE_2 (0x08)
/* Interrupt Mask Register */
#define LAN87XX_INTERRUPT_MASK (0x19)
#define LAN87XX_MASK_LINK_UP (0x0004)
#define LAN87XX_MASK_LINK_DOWN (0x0002)
#define LAN87XX_INTERRUPT_MASK_2 (0x09)
#define LAN87XX_MASK_COMM_RDY BIT(10)
/* MISC Control 1 Register */
#define LAN87XX_CTRL_1 (0x11)
#define LAN87XX_MASK_RGMII_TXC_DLY_EN (0x4000)
#define LAN87XX_MASK_RGMII_RXC_DLY_EN (0x2000)
/* phyaccess nested types */
#define PHYACC_ATTR_MODE_READ 0
#define PHYACC_ATTR_MODE_WRITE 1
#define PHYACC_ATTR_MODE_MODIFY 2
#define PHYACC_ATTR_MODE_POLL 3
#define PHYACC_ATTR_BANK_SMI 0
#define PHYACC_ATTR_BANK_MISC 1
#define PHYACC_ATTR_BANK_PCS 2
#define PHYACC_ATTR_BANK_AFE 3
#define PHYACC_ATTR_BANK_DSP 4
#define PHYACC_ATTR_BANK_MAX 7
/* measurement defines */
#define LAN87XX_CABLE_TEST_OK 0
#define LAN87XX_CABLE_TEST_OPEN 1
#define LAN87XX_CABLE_TEST_SAME_SHORT 2
/* T1 Registers */
#define T1_AFE_PORT_CFG1_REG 0x0B
#define T1_POWER_DOWN_CONTROL_REG 0x1A
#define T1_SLV_FD_MULT_CFG_REG 0x18
#define T1_CDR_CFG_PRE_LOCK_REG 0x05
#define T1_CDR_CFG_POST_LOCK_REG 0x06
#define T1_LCK_STG2_MUFACT_CFG_REG 0x1A
#define T1_LCK_STG3_MUFACT_CFG_REG 0x1B
#define T1_POST_LCK_MUFACT_CFG_REG 0x1C
#define T1_TX_RX_FIFO_CFG_REG 0x02
#define T1_TX_LPF_FIR_CFG_REG 0x55
#define T1_COEF_CLK_PWR_DN_CFG 0x04
#define T1_COEF_RW_CTL_CFG 0x0D
#define T1_SQI_CONFIG_REG 0x2E
#define T1_SQI_CONFIG2_REG 0x4A
#define T1_DCQ_SQI_REG 0xC3
#define T1_DCQ_SQI_MSK GENMASK(3, 1)
#define T1_MDIO_CONTROL2_REG 0x10
#define T1_INTERRUPT_SOURCE_REG 0x18
#define T1_INTERRUPT2_SOURCE_REG 0x08
#define T1_EQ_FD_STG1_FRZ_CFG 0x69
#define T1_EQ_FD_STG2_FRZ_CFG 0x6A
#define T1_EQ_FD_STG3_FRZ_CFG 0x6B
#define T1_EQ_FD_STG4_FRZ_CFG 0x6C
#define T1_EQ_WT_FD_LCK_FRZ_CFG 0x6D
#define T1_PST_EQ_LCK_STG1_FRZ_CFG 0x6E
#define T1_MODE_STAT_REG 0x11
#define T1_LINK_UP_MSK BIT(0)
/* SQI defines */
#define LAN87XX_MAX_SQI 0x07
/* Chiptop registers */
#define LAN887X_PMA_EXT_ABILITY_2 0x12
#define LAN887X_PMA_EXT_ABILITY_2_1000T1 BIT(1)
#define LAN887X_PMA_EXT_ABILITY_2_100T1 BIT(0)
/* DSP 100M registers */
#define LAN887x_CDR_CONFIG1_100 0x0405
#define LAN887x_LOCK1_EQLSR_CONFIG_100 0x0411
#define LAN887x_SLV_HD_MUFAC_CONFIG_100 0x0417
#define LAN887x_PLOCK_MUFAC_CONFIG_100 0x041c
#define LAN887x_PROT_DISABLE_100 0x0425
#define LAN887x_KF_LOOP_SAT_CONFIG_100 0x0454
/* DSP 1000M registers */
#define LAN887X_LOCK1_EQLSR_CONFIG 0x0811
#define LAN887X_LOCK3_EQLSR_CONFIG 0x0813
#define LAN887X_PROT_DISABLE 0x0825
#define LAN887X_FFE_GAIN6 0x0843
#define LAN887X_FFE_GAIN7 0x0844
#define LAN887X_FFE_GAIN8 0x0845
#define LAN887X_FFE_GAIN9 0x0846
#define LAN887X_ECHO_DELAY_CONFIG 0x08ec
#define LAN887X_FFE_MAX_CONFIG 0x08ee
/* PCS 1000M registers */
#define LAN887X_SCR_CONFIG_3 0x8043
#define LAN887X_INFO_FLD_CONFIG_5 0x8048
/* T1 afe registers */
#define LAN887X_ZQCAL_CONTROL_1 0x8080
#define LAN887X_AFE_PORT_TESTBUS_CTRL2 0x8089
#define LAN887X_AFE_PORT_TESTBUS_CTRL4 0x808b
#define LAN887X_AFE_PORT_TESTBUS_CTRL6 0x808d
#define LAN887X_TX_AMPLT_1000T1_REG 0x80b0
#define LAN887X_INIT_COEFF_DFE1_100 0x0422
/* PMA registers */
#define LAN887X_DSP_PMA_CONTROL 0x810e
#define LAN887X_DSP_PMA_CONTROL_LNK_SYNC BIT(4)
/* PCS 100M registers */
#define LAN887X_IDLE_ERR_TIMER_WIN 0x8204
#define LAN887X_IDLE_ERR_CNT_THRESH 0x8213
/* Misc registers */
#define LAN887X_REG_REG26 0x001a
#define LAN887X_REG_REG26_HW_INIT_SEQ_EN BIT(8)
/* Mis registers */
#define LAN887X_MIS_CFG_REG0 0xa00
#define LAN887X_MIS_CFG_REG0_RCLKOUT_DIS BIT(5)
#define LAN887X_MIS_CFG_REG0_MAC_MODE_SEL GENMASK(1, 0)
#define LAN887X_MAC_MODE_RGMII 0x01
#define LAN887X_MAC_MODE_SGMII 0x03
#define LAN887X_MIS_DLL_CFG_REG0 0xa01
#define LAN887X_MIS_DLL_CFG_REG1 0xa02
#define LAN887X_MIS_DLL_DELAY_EN BIT(15)
#define LAN887X_MIS_DLL_EN BIT(0)
#define LAN887X_MIS_DLL_CONF (LAN887X_MIS_DLL_DELAY_EN |\
LAN887X_MIS_DLL_EN)
#define LAN887X_MIS_CFG_REG2 0xa03
#define LAN887X_MIS_CFG_REG2_FE_LPBK_EN BIT(2)
#define LAN887X_MIS_PKT_STAT_REG0 0xa06
#define LAN887X_MIS_PKT_STAT_REG1 0xa07
#define LAN887X_MIS_PKT_STAT_REG3 0xa09
#define LAN887X_MIS_PKT_STAT_REG4 0xa0a
#define LAN887X_MIS_PKT_STAT_REG5 0xa0b
#define LAN887X_MIS_PKT_STAT_REG6 0xa0c
/* Chiptop common registers */
#define LAN887X_COMMON_LED3_LED2 0xc05
#define LAN887X_COMMON_LED2_MODE_SEL_MASK GENMASK(4, 0)
#define LAN887X_LED_LINK_ACT_ANY_SPEED 0x0
/* MX chip top registers */
#define LAN887X_CHIP_HARD_RST 0xf03e
#define LAN887X_CHIP_HARD_RST_RESET BIT(0)
#define LAN887X_CHIP_SOFT_RST 0xf03f
#define LAN887X_CHIP_SOFT_RST_RESET BIT(0)
#define LAN887X_SGMII_CTL 0xf01a
#define LAN887X_SGMII_CTL_SGMII_MUX_EN BIT(0)
#define LAN887X_SGMII_PCS_CFG 0xf034
#define LAN887X_SGMII_PCS_CFG_PCS_ENA BIT(9)
#define LAN887X_EFUSE_READ_DAT9 0xf209
#define LAN887X_EFUSE_READ_DAT9_SGMII_DIS BIT(9)
#define LAN887X_EFUSE_READ_DAT9_MAC_MODE GENMASK(1, 0)
#define LAN887X_CALIB_CONFIG_100 0x437
#define LAN887X_CALIB_CONFIG_100_CBL_DIAG_USE_LOCAL_SMPL BIT(5)
#define LAN887X_CALIB_CONFIG_100_CBL_DIAG_STB_SYNC_MODE BIT(4)
#define LAN887X_CALIB_CONFIG_100_CBL_DIAG_CLK_ALGN_MODE BIT(3)
#define LAN887X_CALIB_CONFIG_100_VAL \
(LAN887X_CALIB_CONFIG_100_CBL_DIAG_CLK_ALGN_MODE |\
LAN887X_CALIB_CONFIG_100_CBL_DIAG_STB_SYNC_MODE |\
LAN887X_CALIB_CONFIG_100_CBL_DIAG_USE_LOCAL_SMPL)
#define LAN887X_MAX_PGA_GAIN_100 0x44f
#define LAN887X_MIN_PGA_GAIN_100 0x450
#define LAN887X_START_CBL_DIAG_100 0x45a
#define LAN887X_CBL_DIAG_DONE BIT(1)
#define LAN887X_CBL_DIAG_START BIT(0)
#define LAN887X_CBL_DIAG_STOP 0x0
#define LAN887X_CBL_DIAG_TDR_THRESH_100 0x45b
#define LAN887X_CBL_DIAG_AGC_THRESH_100 0x45c
#define LAN887X_CBL_DIAG_MIN_WAIT_CONFIG_100 0x45d
#define LAN887X_CBL_DIAG_MAX_WAIT_CONFIG_100 0x45e
#define LAN887X_CBL_DIAG_CYC_CONFIG_100 0x45f
#define LAN887X_CBL_DIAG_TX_PULSE_CONFIG_100 0x460
#define LAN887X_CBL_DIAG_MIN_PGA_GAIN_100 0x462
#define LAN887X_CBL_DIAG_AGC_GAIN_100 0x497
#define LAN887X_CBL_DIAG_POS_PEAK_VALUE_100 0x499
#define LAN887X_CBL_DIAG_NEG_PEAK_VALUE_100 0x49a
#define LAN887X_CBL_DIAG_POS_PEAK_TIME_100 0x49c
#define LAN887X_CBL_DIAG_NEG_PEAK_TIME_100 0x49d
#define MICROCHIP_CABLE_NOISE_MARGIN 20
#define MICROCHIP_CABLE_TIME_MARGIN 89
#define MICROCHIP_CABLE_MIN_TIME_DIFF 96
#define MICROCHIP_CABLE_MAX_TIME_DIFF \
(MICROCHIP_CABLE_MIN_TIME_DIFF + MICROCHIP_CABLE_TIME_MARGIN)
#define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@microchip.com>"
#define DRIVER_DESC "Microchip LAN87XX/LAN937x/LAN887x T1 PHY driver"
/* TEST_MODE_NORMAL: Non-hybrid results to calculate cable status(open/short/ok)
* TEST_MODE_HYBRID: Hybrid results to calculate distance to fault
*/
enum cable_diag_mode {
TEST_MODE_NORMAL,
TEST_MODE_HYBRID
};
/* CD_TEST_INIT: Cable test is initated
* CD_TEST_DONE: Cable test is done
*/
enum cable_diag_state {
CD_TEST_INIT,
CD_TEST_DONE
};
struct access_ereg_val {
u8 mode;
u8 bank;
u8 offset;
u16 val;
u16 mask;
};
struct lan887x_hw_stat {
const char *string;
u8 mmd;
u16 reg;
u8 bits;
};
static const struct lan887x_hw_stat lan887x_hw_stats[] = {
{ "TX Good Count", MDIO_MMD_VEND1, LAN887X_MIS_PKT_STAT_REG0, 14},
{ "RX Good Count", MDIO_MMD_VEND1, LAN887X_MIS_PKT_STAT_REG1, 14},
{ "RX ERR Count detected by PCS", MDIO_MMD_VEND1, LAN887X_MIS_PKT_STAT_REG3, 16},
{ "TX CRC ERR Count", MDIO_MMD_VEND1, LAN887X_MIS_PKT_STAT_REG4, 8},
{ "RX CRC ERR Count", MDIO_MMD_VEND1, LAN887X_MIS_PKT_STAT_REG5, 8},
{ "RX ERR Count for SGMII MII2GMII", MDIO_MMD_VEND1, LAN887X_MIS_PKT_STAT_REG6, 8},
};
struct lan887x_regwr_map {
u8 mmd;
u16 reg;
u16 val;
};
struct lan887x_priv {
u64 stats[ARRAY_SIZE(lan887x_hw_stats)];
};
static int lan937x_dsp_workaround(struct phy_device *phydev, u16 ereg, u8 bank)
{
u8 prev_bank;
int rc = 0;
u16 val;
mutex_lock(&phydev->lock);
/* Read previous selected bank */
rc = phy_read(phydev, LAN87XX_EXT_REG_CTL);
if (rc < 0)
goto out_unlock;
/* store the prev_bank */
prev_bank = FIELD_GET(LAN87XX_REG_BANK_SEL_MASK, rc);
if (bank != prev_bank && bank == PHYACC_ATTR_BANK_DSP) {
val = ereg & ~LAN87XX_REG_ADDR_MASK;
val &= ~LAN87XX_EXT_REG_CTL_WR_CTL;
val |= LAN87XX_EXT_REG_CTL_RD_CTL;
/* access twice for DSP bank change,dummy access */
rc = phy_write(phydev, LAN87XX_EXT_REG_CTL, val);
}
out_unlock:
mutex_unlock(&phydev->lock);
return rc;
}
static int access_ereg(struct phy_device *phydev, u8 mode, u8 bank,
u8 offset, u16 val)
{
u16 ereg = 0;
int rc = 0;
if (mode > PHYACC_ATTR_MODE_WRITE || bank > PHYACC_ATTR_BANK_MAX)
return -EINVAL;
if (bank == PHYACC_ATTR_BANK_SMI) {
if (mode == PHYACC_ATTR_MODE_WRITE)
rc = phy_write(phydev, offset, val);
else
rc = phy_read(phydev, offset);
return rc;
}
if (mode == PHYACC_ATTR_MODE_WRITE) {
ereg = LAN87XX_EXT_REG_CTL_WR_CTL;
rc = phy_write(phydev, LAN87XX_EXT_REG_WR_DATA, val);
if (rc < 0)
return rc;
} else {
ereg = LAN87XX_EXT_REG_CTL_RD_CTL;
}
ereg |= (bank << 8) | offset;
/* DSP bank access workaround for lan937x */
if (phydev->phy_id == PHY_ID_LAN937X) {
rc = lan937x_dsp_workaround(phydev, ereg, bank);
if (rc < 0)
return rc;
}
rc = phy_write(phydev, LAN87XX_EXT_REG_CTL, ereg);
if (rc < 0)
return rc;
if (mode == PHYACC_ATTR_MODE_READ)
rc = phy_read(phydev, LAN87XX_EXT_REG_RD_DATA);
return rc;
}
static int access_ereg_modify_changed(struct phy_device *phydev,
u8 bank, u8 offset, u16 val, u16 mask)
{
int new = 0, rc = 0;
if (bank > PHYACC_ATTR_BANK_MAX)
return -EINVAL;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ, bank, offset, val);
if (rc < 0)
return rc;
new = val | (rc & (mask ^ 0xFFFF));
rc = access_ereg(phydev, PHYACC_ATTR_MODE_WRITE, bank, offset, new);
return rc;
}
static int access_smi_poll_timeout(struct phy_device *phydev,
u8 offset, u16 mask, u16 clr)
{
int val;
return phy_read_poll_timeout(phydev, offset, val, (val & mask) == clr,
150, 30000, true);
}
static int lan87xx_config_rgmii_delay(struct phy_device *phydev)
{
int rc;
if (!phy_interface_is_rgmii(phydev))
return 0;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_MISC, LAN87XX_CTRL_1, 0);
if (rc < 0)
return rc;
switch (phydev->interface) {
case PHY_INTERFACE_MODE_RGMII:
rc &= ~LAN87XX_MASK_RGMII_TXC_DLY_EN;
rc &= ~LAN87XX_MASK_RGMII_RXC_DLY_EN;
break;
case PHY_INTERFACE_MODE_RGMII_ID:
rc |= LAN87XX_MASK_RGMII_TXC_DLY_EN;
rc |= LAN87XX_MASK_RGMII_RXC_DLY_EN;
break;
case PHY_INTERFACE_MODE_RGMII_RXID:
rc &= ~LAN87XX_MASK_RGMII_TXC_DLY_EN;
rc |= LAN87XX_MASK_RGMII_RXC_DLY_EN;
break;
case PHY_INTERFACE_MODE_RGMII_TXID:
rc |= LAN87XX_MASK_RGMII_TXC_DLY_EN;
rc &= ~LAN87XX_MASK_RGMII_RXC_DLY_EN;
break;
default:
return 0;
}
return access_ereg(phydev, PHYACC_ATTR_MODE_WRITE,
PHYACC_ATTR_BANK_MISC, LAN87XX_CTRL_1, rc);
}
static int lan87xx_phy_init_cmd(struct phy_device *phydev,
const struct access_ereg_val *cmd_seq, int cnt)
{
int ret, i;
for (i = 0; i < cnt; i++) {
if (cmd_seq[i].mode == PHYACC_ATTR_MODE_POLL &&
cmd_seq[i].bank == PHYACC_ATTR_BANK_SMI) {
ret = access_smi_poll_timeout(phydev,
cmd_seq[i].offset,
cmd_seq[i].val,
cmd_seq[i].mask);
} else {
ret = access_ereg(phydev, cmd_seq[i].mode,
cmd_seq[i].bank, cmd_seq[i].offset,
cmd_seq[i].val);
}
if (ret < 0)
return ret;
}
return ret;
}
static int lan87xx_phy_init(struct phy_device *phydev)
{
static const struct access_ereg_val hw_init[] = {
/* TXPD/TXAMP6 Configs */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_AFE,
T1_AFE_PORT_CFG1_REG, 0x002D, 0 },
/* HW_Init Hi and Force_ED */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
T1_POWER_DOWN_CONTROL_REG, 0x0308, 0 },
};
static const struct access_ereg_val slave_init[] = {
/* Equalizer Full Duplex Freeze - T1 Slave */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_EQ_FD_STG1_FRZ_CFG, 0x0002, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_EQ_FD_STG2_FRZ_CFG, 0x0002, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_EQ_FD_STG3_FRZ_CFG, 0x0002, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_EQ_FD_STG4_FRZ_CFG, 0x0002, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_EQ_WT_FD_LCK_FRZ_CFG, 0x0002, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_PST_EQ_LCK_STG1_FRZ_CFG, 0x0002, 0 },
};
static const struct access_ereg_val phy_init[] = {
/* Slave Full Duplex Multi Configs */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_SLV_FD_MULT_CFG_REG, 0x0D53, 0 },
/* CDR Pre and Post Lock Configs */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_CDR_CFG_PRE_LOCK_REG, 0x0AB2, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_CDR_CFG_POST_LOCK_REG, 0x0AB3, 0 },
/* Lock Stage 2-3 Multi Factor Config */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_LCK_STG2_MUFACT_CFG_REG, 0x0AEA, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_LCK_STG3_MUFACT_CFG_REG, 0x0AEB, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_POST_LCK_MUFACT_CFG_REG, 0x0AEB, 0 },
/* Pointer delay */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_RX_FIFO_CFG_REG, 0x1C00, 0 },
/* Tx iir edits */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1000, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1861, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1061, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1922, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1122, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1983, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1183, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1944, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1144, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x18c5, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x10c5, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1846, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1046, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1807, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1007, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1808, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1008, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1809, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1009, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x180A, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x100A, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x180B, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x100B, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x180C, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x100C, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x180D, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x100D, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x180E, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x100E, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x180F, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x100F, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1810, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1010, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1811, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1011, 0 },
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_TX_LPF_FIR_CFG_REG, 0x1000, 0 },
/* Setup SQI measurement */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_COEF_CLK_PWR_DN_CFG, 0x16d6, 0 },
/* SQI enable */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_SQI_CONFIG_REG, 0x9572, 0 },
/* SQI select mode 5 */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_SQI_CONFIG2_REG, 0x0001, 0 },
/* Throws the first SQI reading */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
T1_COEF_RW_CTL_CFG, 0x0301, 0 },
{ PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_DSP,
T1_DCQ_SQI_REG, 0, 0 },
/* Flag LPS and WUR as idle errors */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
T1_MDIO_CONTROL2_REG, 0x0014, 0 },
/* HW_Init toggle, undo force ED, TXPD off */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
T1_POWER_DOWN_CONTROL_REG, 0x0200, 0 },
/* Reset PCS to trigger hardware initialization */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
T1_MDIO_CONTROL2_REG, 0x0094, 0 },
/* Poll till Hardware is initialized */
{ PHYACC_ATTR_MODE_POLL, PHYACC_ATTR_BANK_SMI,
T1_MDIO_CONTROL2_REG, 0x0080, 0 },
/* Tx AMP - 0x06 */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_AFE,
T1_AFE_PORT_CFG1_REG, 0x000C, 0 },
/* Read INTERRUPT_SOURCE Register */
{ PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_SMI,
T1_INTERRUPT_SOURCE_REG, 0, 0 },
/* Read INTERRUPT_SOURCE Register */
{ PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_MISC,
T1_INTERRUPT2_SOURCE_REG, 0, 0 },
/* HW_Init Hi */
{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
T1_POWER_DOWN_CONTROL_REG, 0x0300, 0 },
};
int rc;
/* phy Soft reset */
rc = genphy_soft_reset(phydev);
if (rc < 0)
return rc;
/* PHY Initialization */
rc = lan87xx_phy_init_cmd(phydev, hw_init, ARRAY_SIZE(hw_init));
if (rc < 0)
return rc;
rc = genphy_read_master_slave(phydev);
if (rc)
return rc;
/* The following squence needs to run only if phydev is in
* slave mode.
*/
if (phydev->master_slave_state == MASTER_SLAVE_STATE_SLAVE) {
rc = lan87xx_phy_init_cmd(phydev, slave_init,
ARRAY_SIZE(slave_init));
if (rc < 0)
return rc;
}
rc = lan87xx_phy_init_cmd(phydev, phy_init, ARRAY_SIZE(phy_init));
if (rc < 0)
return rc;
return lan87xx_config_rgmii_delay(phydev);
}
static int lan87xx_phy_config_intr(struct phy_device *phydev)
{
int rc, val = 0;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
/* clear all interrupt */
rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val);
if (rc < 0)
return rc;
rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
if (rc < 0)
return rc;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_WRITE,
PHYACC_ATTR_BANK_MISC,
LAN87XX_INTERRUPT_MASK_2, val);
if (rc < 0)
return rc;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_MISC,
LAN87XX_INTERRUPT_SOURCE_2, 0);
if (rc < 0)
return rc;
/* enable link down and comm ready interrupt */
val = LAN87XX_MASK_LINK_DOWN;
rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val);
if (rc < 0)
return rc;
val = LAN87XX_MASK_COMM_RDY;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_WRITE,
PHYACC_ATTR_BANK_MISC,
LAN87XX_INTERRUPT_MASK_2, val);
} else {
rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val);
if (rc < 0)
return rc;
rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
if (rc < 0)
return rc;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_WRITE,
PHYACC_ATTR_BANK_MISC,
LAN87XX_INTERRUPT_MASK_2, val);
if (rc < 0)
return rc;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_MISC,
LAN87XX_INTERRUPT_SOURCE_2, 0);
}
return rc < 0 ? rc : 0;
}
static irqreturn_t lan87xx_handle_interrupt(struct phy_device *phydev)
{
int irq_status;
irq_status = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_MISC,
LAN87XX_INTERRUPT_SOURCE_2, 0);
if (irq_status < 0) {
phy_error(phydev);
return IRQ_NONE;
}
irq_status = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
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 lan87xx_config_init(struct phy_device *phydev)
{
int rc = lan87xx_phy_init(phydev);
return rc < 0 ? rc : 0;
}
static int microchip_cable_test_start_common(struct phy_device *phydev)
{
int bmcr, bmsr, ret;
/* If auto-negotiation is enabled, but not complete, the cable
* test never completes. So disable auto-neg.
*/
bmcr = phy_read(phydev, MII_BMCR);
if (bmcr < 0)
return bmcr;
bmsr = phy_read(phydev, MII_BMSR);
if (bmsr < 0)
return bmsr;
if (bmcr & BMCR_ANENABLE) {
ret = phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
if (ret < 0)
return ret;
ret = genphy_soft_reset(phydev);
if (ret < 0)
return ret;
}
/* If the link is up, allow it some time to go down */
if (bmsr & BMSR_LSTATUS)
msleep(1500);
return 0;
}
static int lan87xx_cable_test_start(struct phy_device *phydev)
{
static const struct access_ereg_val cable_test[] = {
/* min wait */
{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP, 93,
0, 0},
/* max wait */
{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP, 94,
10, 0},
/* pulse cycle */
{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP, 95,
90, 0},
/* cable diag thresh */
{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP, 92,
60, 0},
/* max gain */
{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP, 79,
31, 0},
/* clock align for each iteration */
{PHYACC_ATTR_MODE_MODIFY, PHYACC_ATTR_BANK_DSP, 55,
0, 0x0038},
/* max cycle wait config */
{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP, 94,
70, 0},
/* start cable diag*/
{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP, 90,
1, 0},
};
int rc, i;
rc = microchip_cable_test_start_common(phydev);
if (rc < 0)
return rc;
/* start cable diag */
/* check if part is alive - if not, return diagnostic error */
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_SMI,
0x00, 0);
if (rc < 0)
return rc;
/* master/slave specific configs */
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_SMI,
0x0A, 0);
if (rc < 0)
return rc;
if ((rc & 0x4000) != 0x4000) {
/* DUT is Slave */
rc = access_ereg_modify_changed(phydev, PHYACC_ATTR_BANK_AFE,
0x0E, 0x5, 0x7);
if (rc < 0)
return rc;
rc = access_ereg_modify_changed(phydev, PHYACC_ATTR_BANK_SMI,
0x1A, 0x8, 0x8);
if (rc < 0)
return rc;
} else {
/* DUT is Master */
rc = access_ereg_modify_changed(phydev, PHYACC_ATTR_BANK_SMI,
0x10, 0x8, 0x40);
if (rc < 0)
return rc;
}
for (i = 0; i < ARRAY_SIZE(cable_test); i++) {
if (cable_test[i].mode == PHYACC_ATTR_MODE_MODIFY) {
rc = access_ereg_modify_changed(phydev,
cable_test[i].bank,
cable_test[i].offset,
cable_test[i].val,
cable_test[i].mask);
/* wait 50ms */
msleep(50);
} else {
rc = access_ereg(phydev, cable_test[i].mode,
cable_test[i].bank,
cable_test[i].offset,
cable_test[i].val);
}
if (rc < 0)
return rc;
}
/* cable diag started */
return 0;
}
static int lan87xx_cable_test_report_trans(u32 result)
{
switch (result) {
case LAN87XX_CABLE_TEST_OK:
return ETHTOOL_A_CABLE_RESULT_CODE_OK;
case LAN87XX_CABLE_TEST_OPEN:
return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
case LAN87XX_CABLE_TEST_SAME_SHORT:
return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
default:
/* DIAGNOSTIC_ERROR */
return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
}
}
static int lan87xx_cable_test_report(struct phy_device *phydev)
{
int pos_peak_cycle = 0, pos_peak_in_phases = 0, pos_peak_phase = 0;
int neg_peak_cycle = 0, neg_peak_in_phases = 0, neg_peak_phase = 0;
int noise_margin = 20, time_margin = 89, jitter_var = 30;
int min_time_diff = 96, max_time_diff = 96 + time_margin;
bool fault = false, check_a = false, check_b = false;
int gain_idx = 0, pos_peak = 0, neg_peak = 0;
int pos_peak_time = 0, neg_peak_time = 0;
int pos_peak_in_phases_hybrid = 0;
int detect = -1;
gain_idx = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_DSP, 151, 0);
/* read non-hybrid results */
pos_peak = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_DSP, 153, 0);
neg_peak = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_DSP, 154, 0);
pos_peak_time = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_DSP, 156, 0);
neg_peak_time = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_DSP, 157, 0);
pos_peak_cycle = (pos_peak_time >> 7) & 0x7F;
/* calculate non-hybrid values */
pos_peak_phase = pos_peak_time & 0x7F;
pos_peak_in_phases = (pos_peak_cycle * 96) + pos_peak_phase;
neg_peak_cycle = (neg_peak_time >> 7) & 0x7F;
neg_peak_phase = neg_peak_time & 0x7F;
neg_peak_in_phases = (neg_peak_cycle * 96) + neg_peak_phase;
/* process values */
check_a =
((pos_peak_in_phases - neg_peak_in_phases) >= min_time_diff) &&
((pos_peak_in_phases - neg_peak_in_phases) < max_time_diff) &&
pos_peak_in_phases_hybrid < pos_peak_in_phases &&
(pos_peak_in_phases_hybrid < (neg_peak_in_phases + jitter_var));
check_b =
((neg_peak_in_phases - pos_peak_in_phases) >= min_time_diff) &&
((neg_peak_in_phases - pos_peak_in_phases) < max_time_diff) &&
pos_peak_in_phases_hybrid < neg_peak_in_phases &&
(pos_peak_in_phases_hybrid < (pos_peak_in_phases + jitter_var));
if (pos_peak_in_phases > neg_peak_in_phases && check_a)
detect = 2;
else if ((neg_peak_in_phases > pos_peak_in_phases) && check_b)
detect = 1;
if (pos_peak > noise_margin && neg_peak > noise_margin &&
gain_idx >= 0) {
if (detect == 1 || detect == 2)
fault = true;
}
if (!fault)
detect = 0;
ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
lan87xx_cable_test_report_trans(detect));
return phy_init_hw(phydev);
}
static int lan87xx_cable_test_get_status(struct phy_device *phydev,
bool *finished)
{
int rc = 0;
*finished = false;
/* check if cable diag was finished */
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_DSP,
90, 0);
if (rc < 0)
return rc;
if ((rc & 2) == 2) {
/* stop cable diag*/
rc = access_ereg(phydev, PHYACC_ATTR_MODE_WRITE,
PHYACC_ATTR_BANK_DSP,
90, 0);
if (rc < 0)
return rc;
*finished = true;
return lan87xx_cable_test_report(phydev);
}
return 0;
}
static int lan87xx_read_status(struct phy_device *phydev)
{
int rc = 0;
rc = phy_read(phydev, T1_MODE_STAT_REG);
if (rc < 0)
return rc;
if (rc & T1_LINK_UP_MSK)
phydev->link = 1;
else
phydev->link = 0;
phydev->speed = SPEED_UNKNOWN;
phydev->duplex = DUPLEX_UNKNOWN;
phydev->pause = 0;
phydev->asym_pause = 0;
rc = genphy_read_master_slave(phydev);
if (rc < 0)
return rc;
rc = genphy_read_status_fixed(phydev);
if (rc < 0)
return rc;
return rc;
}
static int lan87xx_config_aneg(struct phy_device *phydev)
{
u16 ctl = 0;
int ret;
switch (phydev->master_slave_set) {
case MASTER_SLAVE_CFG_MASTER_FORCE:
ctl |= CTL1000_AS_MASTER;
break;
case MASTER_SLAVE_CFG_SLAVE_FORCE:
break;
case MASTER_SLAVE_CFG_UNKNOWN:
case MASTER_SLAVE_CFG_UNSUPPORTED:
return 0;
default:
phydev_warn(phydev, "Unsupported Master/Slave mode\n");
return -EOPNOTSUPP;
}
ret = phy_modify_changed(phydev, MII_CTRL1000, CTL1000_AS_MASTER, ctl);
if (ret == 1)
return phy_init_hw(phydev);
return ret;
}
static int lan87xx_get_sqi(struct phy_device *phydev)
{
u8 sqi_value = 0;
int rc;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_WRITE,
PHYACC_ATTR_BANK_DSP, T1_COEF_RW_CTL_CFG, 0x0301);
if (rc < 0)
return rc;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_DSP, T1_DCQ_SQI_REG, 0x0);
if (rc < 0)
return rc;
sqi_value = FIELD_GET(T1_DCQ_SQI_MSK, rc);
return sqi_value;
}
static int lan87xx_get_sqi_max(struct phy_device *phydev)
{
return LAN87XX_MAX_SQI;
}
static int lan887x_rgmii_init(struct phy_device *phydev)
{
int ret;
/* SGMII mux disable */
ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_SGMII_CTL,
LAN887X_SGMII_CTL_SGMII_MUX_EN);
if (ret < 0)
return ret;
/* Select MAC_MODE as RGMII */
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_CFG_REG0,
LAN887X_MIS_CFG_REG0_MAC_MODE_SEL,
LAN887X_MAC_MODE_RGMII);
if (ret < 0)
return ret;
/* Disable PCS */
ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_SGMII_PCS_CFG,
LAN887X_SGMII_PCS_CFG_PCS_ENA);
if (ret < 0)
return ret;
/* LAN887x Errata: RGMII rx clock active in SGMII mode
* Disabled it for SGMII mode
* Re-enabling it for RGMII mode
*/
return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_MIS_CFG_REG0,
LAN887X_MIS_CFG_REG0_RCLKOUT_DIS);
}
static int lan887x_sgmii_init(struct phy_device *phydev)
{
int ret;
/* SGMII mux enable */
ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_SGMII_CTL,
LAN887X_SGMII_CTL_SGMII_MUX_EN);
if (ret < 0)
return ret;
/* Select MAC_MODE as SGMII */
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_CFG_REG0,
LAN887X_MIS_CFG_REG0_MAC_MODE_SEL,
LAN887X_MAC_MODE_SGMII);
if (ret < 0)
return ret;
/* LAN887x Errata: RGMII rx clock active in SGMII mode.
* So disabling it for SGMII mode
*/
ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_CFG_REG0,
LAN887X_MIS_CFG_REG0_RCLKOUT_DIS);
if (ret < 0)
return ret;
/* Enable PCS */
return phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, LAN887X_SGMII_PCS_CFG,
LAN887X_SGMII_PCS_CFG_PCS_ENA);
}
static int lan887x_config_rgmii_en(struct phy_device *phydev)
{
int txc;
int rxc;
int ret;
ret = lan887x_rgmii_init(phydev);
if (ret < 0)
return ret;
/* Control bit to enable/disable TX DLL delay line in signal path */
txc = phy_read_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_DLL_CFG_REG0);
if (txc < 0)
return txc;
/* Control bit to enable/disable RX DLL delay line in signal path */
rxc = phy_read_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_DLL_CFG_REG1);
if (rxc < 0)
return rxc;
/* Configures the phy to enable RX/TX delay
* RGMII - TX & RX delays are either added by MAC or not needed,
* phy should not add
* RGMII_ID - Configures phy to enable TX & RX delays, MAC shouldn't add
* RGMII_RX_ID - Configures the PHY to enable the RX delay.
* The MAC shouldn't add the RX delay
* RGMII_TX_ID - Configures the PHY to enable the TX delay.
* The MAC shouldn't add the TX delay in this case
*/
switch (phydev->interface) {
case PHY_INTERFACE_MODE_RGMII:
txc &= ~LAN887X_MIS_DLL_CONF;
rxc &= ~LAN887X_MIS_DLL_CONF;
break;
case PHY_INTERFACE_MODE_RGMII_ID:
txc |= LAN887X_MIS_DLL_CONF;
rxc |= LAN887X_MIS_DLL_CONF;
break;
case PHY_INTERFACE_MODE_RGMII_RXID:
txc &= ~LAN887X_MIS_DLL_CONF;
rxc |= LAN887X_MIS_DLL_CONF;
break;
case PHY_INTERFACE_MODE_RGMII_TXID:
txc |= LAN887X_MIS_DLL_CONF;
rxc &= ~LAN887X_MIS_DLL_CONF;
break;
default:
WARN_ONCE(1, "Invalid phydev interface %d\n", phydev->interface);
return 0;
}
/* Configures the PHY to enable/disable RX delay in signal path */
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_DLL_CFG_REG1,
LAN887X_MIS_DLL_CONF, rxc);
if (ret < 0)
return ret;
/* Configures the PHY to enable/disable the TX delay in signal path */
return phy_modify_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_DLL_CFG_REG0,
LAN887X_MIS_DLL_CONF, txc);
}
static int lan887x_config_phy_interface(struct phy_device *phydev)
{
int interface_mode;
int sgmii_dis;
int ret;
/* Read sku efuse data for interfaces supported by sku */
ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, LAN887X_EFUSE_READ_DAT9);
if (ret < 0)
return ret;
/* If interface_mode is 1 then efuse sets RGMII operations.
* If interface mode is 3 then efuse sets SGMII operations.
*/
interface_mode = ret & LAN887X_EFUSE_READ_DAT9_MAC_MODE;
/* SGMII disable is set for RGMII operations */
sgmii_dis = ret & LAN887X_EFUSE_READ_DAT9_SGMII_DIS;
switch (phydev->interface) {
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:
/* Reject RGMII settings for SGMII only sku */
ret = -EOPNOTSUPP;
if (!((interface_mode & LAN887X_MAC_MODE_SGMII) ==
LAN887X_MAC_MODE_SGMII))
ret = lan887x_config_rgmii_en(phydev);
break;
case PHY_INTERFACE_MODE_SGMII:
/* Reject SGMII setting for RGMII only sku */
ret = -EOPNOTSUPP;
if (!sgmii_dis)
ret = lan887x_sgmii_init(phydev);
break;
default:
/* Reject setting for unsupported interfaces */
ret = -EOPNOTSUPP;
}
return ret;
}
static int lan887x_get_features(struct phy_device *phydev)
{
int ret;
ret = genphy_c45_pma_read_abilities(phydev);
if (ret < 0)
return ret;
/* Enable twisted pair */
linkmode_set_bit(ETHTOOL_LINK_MODE_TP_BIT, phydev->supported);
/* First patch only supports 100Mbps and 1000Mbps force-mode.
* T1 Auto-Negotiation (Clause 98 of IEEE 802.3) will be added later.
*/
linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
return 0;
}
static int lan887x_phy_init(struct phy_device *phydev)
{
int ret;
/* Clear loopback */
ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_MIS_CFG_REG2,
LAN887X_MIS_CFG_REG2_FE_LPBK_EN);
if (ret < 0)
return ret;
/* Configure default behavior of led to link and activity for any
* speed
*/
ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_COMMON_LED3_LED2,
LAN887X_COMMON_LED2_MODE_SEL_MASK,
LAN887X_LED_LINK_ACT_ANY_SPEED);
if (ret < 0)
return ret;
/* PHY interface setup */
return lan887x_config_phy_interface(phydev);
}
static int lan887x_phy_config(struct phy_device *phydev,
const struct lan887x_regwr_map *reg_map, int cnt)
{
int ret;
for (int i = 0; i < cnt; i++) {
ret = phy_write_mmd(phydev, reg_map[i].mmd,
reg_map[i].reg, reg_map[i].val);
if (ret < 0)
return ret;
}
return 0;
}
static int lan887x_phy_setup(struct phy_device *phydev)
{
static const struct lan887x_regwr_map phy_cfg[] = {
/* PORT_AFE writes */
{MDIO_MMD_PMAPMD, LAN887X_ZQCAL_CONTROL_1, 0x4008},
{MDIO_MMD_PMAPMD, LAN887X_AFE_PORT_TESTBUS_CTRL2, 0x0000},
{MDIO_MMD_PMAPMD, LAN887X_AFE_PORT_TESTBUS_CTRL6, 0x0040},
/* 100T1_PCS_VENDOR writes */
{MDIO_MMD_PCS, LAN887X_IDLE_ERR_CNT_THRESH, 0x0008},
{MDIO_MMD_PCS, LAN887X_IDLE_ERR_TIMER_WIN, 0x800d},
/* 100T1 DSP writes */
{MDIO_MMD_VEND1, LAN887x_CDR_CONFIG1_100, 0x0ab1},
{MDIO_MMD_VEND1, LAN887x_LOCK1_EQLSR_CONFIG_100, 0x5274},
{MDIO_MMD_VEND1, LAN887x_SLV_HD_MUFAC_CONFIG_100, 0x0d74},
{MDIO_MMD_VEND1, LAN887x_PLOCK_MUFAC_CONFIG_100, 0x0aea},
{MDIO_MMD_VEND1, LAN887x_PROT_DISABLE_100, 0x0360},
{MDIO_MMD_VEND1, LAN887x_KF_LOOP_SAT_CONFIG_100, 0x0c30},
/* 1000T1 DSP writes */
{MDIO_MMD_VEND1, LAN887X_LOCK1_EQLSR_CONFIG, 0x2a78},
{MDIO_MMD_VEND1, LAN887X_LOCK3_EQLSR_CONFIG, 0x1368},
{MDIO_MMD_VEND1, LAN887X_PROT_DISABLE, 0x1354},
{MDIO_MMD_VEND1, LAN887X_FFE_GAIN6, 0x3C84},
{MDIO_MMD_VEND1, LAN887X_FFE_GAIN7, 0x3ca5},
{MDIO_MMD_VEND1, LAN887X_FFE_GAIN8, 0x3ca5},
{MDIO_MMD_VEND1, LAN887X_FFE_GAIN9, 0x3ca5},
{MDIO_MMD_VEND1, LAN887X_ECHO_DELAY_CONFIG, 0x0024},
{MDIO_MMD_VEND1, LAN887X_FFE_MAX_CONFIG, 0x227f},
/* 1000T1 PCS writes */
{MDIO_MMD_PCS, LAN887X_SCR_CONFIG_3, 0x1e00},
{MDIO_MMD_PCS, LAN887X_INFO_FLD_CONFIG_5, 0x0fa1},
};
return lan887x_phy_config(phydev, phy_cfg, ARRAY_SIZE(phy_cfg));
}
static int lan887x_100M_setup(struct phy_device *phydev)
{
int ret;
/* (Re)configure the speed/mode dependent T1 settings */
if (phydev->master_slave_set == MASTER_SLAVE_CFG_MASTER_FORCE ||
phydev->master_slave_set == MASTER_SLAVE_CFG_MASTER_PREFERRED){
static const struct lan887x_regwr_map phy_cfg[] = {
{MDIO_MMD_PMAPMD, LAN887X_AFE_PORT_TESTBUS_CTRL4, 0x00b8},
{MDIO_MMD_PMAPMD, LAN887X_TX_AMPLT_1000T1_REG, 0x0038},
{MDIO_MMD_VEND1, LAN887X_INIT_COEFF_DFE1_100, 0x000f},
};
ret = lan887x_phy_config(phydev, phy_cfg, ARRAY_SIZE(phy_cfg));
} else {
static const struct lan887x_regwr_map phy_cfg[] = {
{MDIO_MMD_PMAPMD, LAN887X_AFE_PORT_TESTBUS_CTRL4, 0x0038},
{MDIO_MMD_VEND1, LAN887X_INIT_COEFF_DFE1_100, 0x0014},
};
ret = lan887x_phy_config(phydev, phy_cfg, ARRAY_SIZE(phy_cfg));
}
if (ret < 0)
return ret;
return phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, LAN887X_REG_REG26,
LAN887X_REG_REG26_HW_INIT_SEQ_EN);
}
static int lan887x_1000M_setup(struct phy_device *phydev)
{
static const struct lan887x_regwr_map phy_cfg[] = {
{MDIO_MMD_PMAPMD, LAN887X_TX_AMPLT_1000T1_REG, 0x003f},
{MDIO_MMD_PMAPMD, LAN887X_AFE_PORT_TESTBUS_CTRL4, 0x00b8},
};
int ret;
/* (Re)configure the speed/mode dependent T1 settings */
ret = lan887x_phy_config(phydev, phy_cfg, ARRAY_SIZE(phy_cfg));
if (ret < 0)
return ret;
return phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, LAN887X_DSP_PMA_CONTROL,
LAN887X_DSP_PMA_CONTROL_LNK_SYNC);
}
static int lan887x_link_setup(struct phy_device *phydev)
{
int ret = -EINVAL;
if (phydev->speed == SPEED_1000)
ret = lan887x_1000M_setup(phydev);
else if (phydev->speed == SPEED_100)
ret = lan887x_100M_setup(phydev);
return ret;
}
/* LAN887x Errata: speed configuration changes require soft reset
* and chip soft reset
*/
static int lan887x_phy_reset(struct phy_device *phydev)
{
int ret, val;
/* Clear 1000M link sync */
ret = phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, LAN887X_DSP_PMA_CONTROL,
LAN887X_DSP_PMA_CONTROL_LNK_SYNC);
if (ret < 0)
return ret;
/* Clear 100M link sync */
ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, LAN887X_REG_REG26,
LAN887X_REG_REG26_HW_INIT_SEQ_EN);
if (ret < 0)
return ret;
/* Chiptop soft-reset to allow the speed/mode change */
ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, LAN887X_CHIP_SOFT_RST,
LAN887X_CHIP_SOFT_RST_RESET);
if (ret < 0)
return ret;
/* CL22 soft-reset to let the link re-train */
ret = phy_modify(phydev, MII_BMCR, BMCR_RESET, BMCR_RESET);
if (ret < 0)
return ret;
/* Wait for reset complete or timeout if > 10ms */
return phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
5000, 10000, true);
}
static int lan887x_phy_reconfig(struct phy_device *phydev)
{
int ret;
linkmode_zero(phydev->advertising);
ret = genphy_c45_pma_setup_forced(phydev);
if (ret < 0)
return ret;
return lan887x_link_setup(phydev);
}
static int lan887x_config_aneg(struct phy_device *phydev)
{
int ret;
/* LAN887x Errata: speed configuration changes require soft reset
* and chip soft reset
*/
ret = lan887x_phy_reset(phydev);
if (ret < 0)
return ret;
return lan887x_phy_reconfig(phydev);
}
static int lan887x_probe(struct phy_device *phydev)
{
struct lan887x_priv *priv;
priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
phydev->priv = priv;
return lan887x_phy_setup(phydev);
}
static u64 lan887x_get_stat(struct phy_device *phydev, int i)
{
struct lan887x_hw_stat stat = lan887x_hw_stats[i];
struct lan887x_priv *priv = phydev->priv;
int val;
u64 ret;
if (stat.mmd)
val = phy_read_mmd(phydev, stat.mmd, stat.reg);
else
val = phy_read(phydev, stat.reg);
if (val < 0) {
ret = U64_MAX;
} else {
val = val & ((1 << stat.bits) - 1);
priv->stats[i] += val;
ret = priv->stats[i];
}
return ret;
}
static void lan887x_get_stats(struct phy_device *phydev,
struct ethtool_stats *stats, u64 *data)
{
for (int i = 0; i < ARRAY_SIZE(lan887x_hw_stats); i++)
data[i] = lan887x_get_stat(phydev, i);
}
static int lan887x_get_sset_count(struct phy_device *phydev)
{
return ARRAY_SIZE(lan887x_hw_stats);
}
static void lan887x_get_strings(struct phy_device *phydev, u8 *data)
{
for (int i = 0; i < ARRAY_SIZE(lan887x_hw_stats); i++)
ethtool_puts(&data, lan887x_hw_stats[i].string);
}
static int lan887x_cd_reset(struct phy_device *phydev,
enum cable_diag_state cd_done)
{
u16 val;
int rc;
/* Chip hard-reset */
rc = phy_write_mmd(phydev, MDIO_MMD_VEND1, LAN887X_CHIP_HARD_RST,
LAN887X_CHIP_HARD_RST_RESET);
if (rc < 0)
return rc;
/* Wait for reset to complete */
rc = phy_read_poll_timeout(phydev, MII_PHYSID2, val,
((val & GENMASK(15, 4)) ==
(PHY_ID_LAN887X & GENMASK(15, 4))),
5000, 50000, true);
if (rc < 0)
return rc;
if (cd_done == CD_TEST_DONE) {
/* Cable diagnostics complete. Restore PHY. */
rc = lan887x_phy_setup(phydev);
if (rc < 0)
return rc;
rc = lan887x_phy_init(phydev);
if (rc < 0)
return rc;
rc = lan887x_phy_reconfig(phydev);
if (rc < 0)
return rc;
}
return 0;
}
static int lan887x_cable_test_prep(struct phy_device *phydev,
enum cable_diag_mode mode)
{
static const struct lan887x_regwr_map values[] = {
{MDIO_MMD_VEND1, LAN887X_MAX_PGA_GAIN_100, 0x1f},
{MDIO_MMD_VEND1, LAN887X_MIN_PGA_GAIN_100, 0x0},
{MDIO_MMD_VEND1, LAN887X_CBL_DIAG_TDR_THRESH_100, 0x1},
{MDIO_MMD_VEND1, LAN887X_CBL_DIAG_AGC_THRESH_100, 0x3c},
{MDIO_MMD_VEND1, LAN887X_CBL_DIAG_MIN_WAIT_CONFIG_100, 0x0},
{MDIO_MMD_VEND1, LAN887X_CBL_DIAG_MAX_WAIT_CONFIG_100, 0x46},
{MDIO_MMD_VEND1, LAN887X_CBL_DIAG_CYC_CONFIG_100, 0x5a},
{MDIO_MMD_VEND1, LAN887X_CBL_DIAG_TX_PULSE_CONFIG_100, 0x44d5},
{MDIO_MMD_VEND1, LAN887X_CBL_DIAG_MIN_PGA_GAIN_100, 0x0},
};
int rc;
rc = lan887x_cd_reset(phydev, CD_TEST_INIT);
if (rc < 0)
return rc;
/* Forcing DUT to master mode, as we don't care about
* mode during diagnostics
*/
rc = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_PMD_BT1_CTRL,
MDIO_PMA_PMD_BT1_CTRL_CFG_MST);
if (rc < 0)
return rc;
rc = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, 0x80b0, 0x0038);
if (rc < 0)
return rc;
rc = phy_modify_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_CALIB_CONFIG_100, 0,
LAN887X_CALIB_CONFIG_100_VAL);
if (rc < 0)
return rc;
for (int i = 0; i < ARRAY_SIZE(values); i++) {
rc = phy_write_mmd(phydev, values[i].mmd, values[i].reg,
values[i].val);
if (rc < 0)
return rc;
if (mode &&
values[i].reg == LAN887X_CBL_DIAG_MAX_WAIT_CONFIG_100) {
rc = phy_write_mmd(phydev, values[i].mmd,
values[i].reg, 0xa);
if (rc < 0)
return rc;
}
}
if (mode == TEST_MODE_HYBRID) {
rc = phy_modify_mmd(phydev, MDIO_MMD_PMAPMD,
LAN887X_AFE_PORT_TESTBUS_CTRL4,
BIT(0), BIT(0));
if (rc < 0)
return rc;
}
/* HW_INIT 100T1, Get DUT running in 100T1 mode */
rc = phy_modify_mmd(phydev, MDIO_MMD_VEND1, LAN887X_REG_REG26,
LAN887X_REG_REG26_HW_INIT_SEQ_EN,
LAN887X_REG_REG26_HW_INIT_SEQ_EN);
if (rc < 0)
return rc;
/* Cable diag requires hard reset and is sensitive regarding the delays.
* Hard reset is expected into and out of cable diag.
* Wait for 50ms
*/
msleep(50);
/* Start cable diag */
return phy_write_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_START_CBL_DIAG_100,
LAN887X_CBL_DIAG_START);
}
static int lan887x_cable_test_chk(struct phy_device *phydev,
enum cable_diag_mode mode)
{
int val;
int rc;
if (mode == TEST_MODE_HYBRID) {
/* Cable diag requires hard reset and is sensitive regarding the delays.
* Hard reset is expected into and out of cable diag.
* Wait for cable diag to complete.
* Minimum wait time is 50ms if the condition is not a match.
*/
rc = phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND1,
LAN887X_START_CBL_DIAG_100, val,
((val & LAN887X_CBL_DIAG_DONE) ==
LAN887X_CBL_DIAG_DONE),
50000, 500000, false);
if (rc < 0)
return rc;
} else {
rc = phy_read_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_START_CBL_DIAG_100);
if (rc < 0)
return rc;
if ((rc & LAN887X_CBL_DIAG_DONE) != LAN887X_CBL_DIAG_DONE)
return -EAGAIN;
}
/* Stop cable diag */
return phy_write_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_START_CBL_DIAG_100,
LAN887X_CBL_DIAG_STOP);
}
static int lan887x_cable_test_start(struct phy_device *phydev)
{
int rc, ret;
rc = lan887x_cable_test_prep(phydev, TEST_MODE_NORMAL);
if (rc < 0) {
ret = lan887x_cd_reset(phydev, CD_TEST_DONE);
if (ret < 0)
return ret;
return rc;
}
return 0;
}
static int lan887x_cable_test_report(struct phy_device *phydev)
{
int pos_peak_cycle, pos_peak_cycle_hybrid, pos_peak_in_phases;
int pos_peak_time, pos_peak_time_hybrid, neg_peak_time;
int neg_peak_cycle, neg_peak_in_phases;
int pos_peak_in_phases_hybrid;
int gain_idx, gain_idx_hybrid;
int pos_peak_phase_hybrid;
int pos_peak, neg_peak;
int distance;
int detect;
int length;
int ret;
int rc;
/* Read non-hybrid results */
gain_idx = phy_read_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_CBL_DIAG_AGC_GAIN_100);
if (gain_idx < 0) {
rc = gain_idx;
goto error;
}
pos_peak = phy_read_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_CBL_DIAG_POS_PEAK_VALUE_100);
if (pos_peak < 0) {
rc = pos_peak;
goto error;
}
neg_peak = phy_read_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_CBL_DIAG_NEG_PEAK_VALUE_100);
if (neg_peak < 0) {
rc = neg_peak;
goto error;
}
pos_peak_time = phy_read_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_CBL_DIAG_POS_PEAK_TIME_100);
if (pos_peak_time < 0) {
rc = pos_peak_time;
goto error;
}
neg_peak_time = phy_read_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_CBL_DIAG_NEG_PEAK_TIME_100);
if (neg_peak_time < 0) {
rc = neg_peak_time;
goto error;
}
/* Calculate non-hybrid values */
pos_peak_cycle = (pos_peak_time >> 7) & 0x7f;
pos_peak_in_phases = (pos_peak_cycle * 96) + (pos_peak_time & 0x7f);
neg_peak_cycle = (neg_peak_time >> 7) & 0x7f;
neg_peak_in_phases = (neg_peak_cycle * 96) + (neg_peak_time & 0x7f);
/* Deriving the status of cable */
if (pos_peak > MICROCHIP_CABLE_NOISE_MARGIN &&
neg_peak > MICROCHIP_CABLE_NOISE_MARGIN && gain_idx >= 0) {
if (pos_peak_in_phases > neg_peak_in_phases &&
((pos_peak_in_phases - neg_peak_in_phases) >=
MICROCHIP_CABLE_MIN_TIME_DIFF) &&
((pos_peak_in_phases - neg_peak_in_phases) <
MICROCHIP_CABLE_MAX_TIME_DIFF) &&
pos_peak_in_phases > 0) {
detect = LAN87XX_CABLE_TEST_SAME_SHORT;
} else if (neg_peak_in_phases > pos_peak_in_phases &&
((neg_peak_in_phases - pos_peak_in_phases) >=
MICROCHIP_CABLE_MIN_TIME_DIFF) &&
((neg_peak_in_phases - pos_peak_in_phases) <
MICROCHIP_CABLE_MAX_TIME_DIFF) &&
neg_peak_in_phases > 0) {
detect = LAN87XX_CABLE_TEST_OPEN;
} else {
detect = LAN87XX_CABLE_TEST_OK;
}
} else {
detect = LAN87XX_CABLE_TEST_OK;
}
if (detect == LAN87XX_CABLE_TEST_OK) {
distance = 0;
goto get_len;
}
/* Re-initialize PHY and start cable diag test */
rc = lan887x_cable_test_prep(phydev, TEST_MODE_HYBRID);
if (rc < 0)
goto cd_stop;
/* Wait for cable diag test completion */
rc = lan887x_cable_test_chk(phydev, TEST_MODE_HYBRID);
if (rc < 0)
goto cd_stop;
/* Read hybrid results */
gain_idx_hybrid = phy_read_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_CBL_DIAG_AGC_GAIN_100);
if (gain_idx_hybrid < 0) {
rc = gain_idx_hybrid;
goto error;
}
pos_peak_time_hybrid = phy_read_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_CBL_DIAG_POS_PEAK_TIME_100);
if (pos_peak_time_hybrid < 0) {
rc = pos_peak_time_hybrid;
goto error;
}
/* Calculate hybrid values to derive cable length to fault */
pos_peak_cycle_hybrid = (pos_peak_time_hybrid >> 7) & 0x7f;
pos_peak_phase_hybrid = pos_peak_time_hybrid & 0x7f;
pos_peak_in_phases_hybrid = pos_peak_cycle_hybrid * 96 +
pos_peak_phase_hybrid;
/* Distance to fault calculation.
* distance = (peak_in_phases - peak_in_phases_hybrid) *
* propagationconstant.
* constant to convert number of phases to meters
* propagationconstant = 0.015953
* (0.6811 * 2.9979 * 156.2499 * 0.0001 * 0.5)
* Applying constant 1.5953 as ethtool further devides by 100 to
* convert to meters.
*/
if (detect == LAN87XX_CABLE_TEST_OPEN) {
distance = (((pos_peak_in_phases - pos_peak_in_phases_hybrid)
* 15953) / 10000);
} else if (detect == LAN87XX_CABLE_TEST_SAME_SHORT) {
distance = (((neg_peak_in_phases - pos_peak_in_phases_hybrid)
* 15953) / 10000);
} else {
distance = 0;
}
get_len:
rc = lan887x_cd_reset(phydev, CD_TEST_DONE);
if (rc < 0)
return rc;
length = ((u32)distance & GENMASK(15, 0));
ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
lan87xx_cable_test_report_trans(detect));
ethnl_cable_test_fault_length(phydev, ETHTOOL_A_CABLE_PAIR_A, length);
return 0;
cd_stop:
/* Stop cable diag */
ret = phy_write_mmd(phydev, MDIO_MMD_VEND1,
LAN887X_START_CBL_DIAG_100,
LAN887X_CBL_DIAG_STOP);
if (ret < 0)
return ret;
error:
/* Cable diag test failed */
ret = lan887x_cd_reset(phydev, CD_TEST_DONE);
if (ret < 0)
return ret;
/* Return error in failure case */
return rc;
}
static int lan887x_cable_test_get_status(struct phy_device *phydev,
bool *finished)
{
int rc;
rc = lan887x_cable_test_chk(phydev, TEST_MODE_NORMAL);
if (rc < 0) {
/* Let PHY statemachine poll again */
if (rc == -EAGAIN)
return 0;
return rc;
}
/* Cable diag test complete */
*finished = true;
/* Retrieve test status and cable length to fault */
return lan887x_cable_test_report(phydev);
}
static struct phy_driver microchip_t1_phy_driver[] = {
{
PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX),
.name = "Microchip LAN87xx T1",
.flags = PHY_POLL_CABLE_TEST,
.features = PHY_BASIC_T1_FEATURES,
.config_init = lan87xx_config_init,
.config_intr = lan87xx_phy_config_intr,
.handle_interrupt = lan87xx_handle_interrupt,
.suspend = genphy_suspend,
.resume = genphy_resume,
.config_aneg = lan87xx_config_aneg,
.read_status = lan87xx_read_status,
.get_sqi = lan87xx_get_sqi,
.get_sqi_max = lan87xx_get_sqi_max,
.cable_test_start = lan87xx_cable_test_start,
.cable_test_get_status = lan87xx_cable_test_get_status,
},
{
PHY_ID_MATCH_MODEL(PHY_ID_LAN937X),
.name = "Microchip LAN937x T1",
.flags = PHY_POLL_CABLE_TEST,
.features = PHY_BASIC_T1_FEATURES,
.config_init = lan87xx_config_init,
.config_intr = lan87xx_phy_config_intr,
.handle_interrupt = lan87xx_handle_interrupt,
.suspend = genphy_suspend,
.resume = genphy_resume,
.config_aneg = lan87xx_config_aneg,
.read_status = lan87xx_read_status,
.get_sqi = lan87xx_get_sqi,
.get_sqi_max = lan87xx_get_sqi_max,
.cable_test_start = lan87xx_cable_test_start,
.cable_test_get_status = lan87xx_cable_test_get_status,
},
{
PHY_ID_MATCH_MODEL(PHY_ID_LAN887X),
.name = "Microchip LAN887x T1 PHY",
.flags = PHY_POLL_CABLE_TEST,
.probe = lan887x_probe,
.get_features = lan887x_get_features,
.config_init = lan887x_phy_init,
.config_aneg = lan887x_config_aneg,
.get_stats = lan887x_get_stats,
.get_sset_count = lan887x_get_sset_count,
.get_strings = lan887x_get_strings,
.suspend = genphy_suspend,
.resume = genphy_resume,
.read_status = genphy_c45_read_status,
.cable_test_start = lan887x_cable_test_start,
.cable_test_get_status = lan887x_cable_test_get_status,
}
};
module_phy_driver(microchip_t1_phy_driver);
static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
{ PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX) },
{ PHY_ID_MATCH_MODEL(PHY_ID_LAN937X) },
{ PHY_ID_MATCH_MODEL(PHY_ID_LAN887X) },
{ }
};
MODULE_DEVICE_TABLE(mdio, microchip_t1_tbl);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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