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// SPDX-License-Identifier: GPL-2.0
/* NXP TJA1100 BroadRReach PHY driver
*
* Copyright (C) 2022 Michael Trimarchi <michael@amarulasolutions.com>
* Copyright (C) 2022 Ariel D'Alessandro <ariel.dalessandro@collabora.com>
* Copyright (C) 2018 Marek Vasut <marex@denx.de>
*/
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/iopoll.h>
#include <phy.h>
#define PHY_ID_MASK 0xfffffff0
#define PHY_ID_TJA1100 0x0180dc40
#define PHY_ID_TJA1101 0x0180dd00
#define MII_ECTRL 17
#define MII_ECTRL_LINK_CONTROL BIT(15)
#define MII_ECTRL_POWER_MODE_MASK GENMASK(14, 11)
#define MII_ECTRL_POWER_MODE_NO_CHANGE (0x0 << 11)
#define MII_ECTRL_POWER_MODE_NORMAL (0x3 << 11)
#define MII_ECTRL_POWER_MODE_STANDBY (0xc << 11)
#define MII_ECTRL_CABLE_TEST BIT(5)
#define MII_ECTRL_CONFIG_EN BIT(2)
#define MII_ECTRL_WAKE_REQUEST BIT(0)
#define MII_CFG1 18
#define MII_CFG1_MASTER_SLAVE BIT(15)
#define MII_CFG1_AUTO_OP BIT(14)
#define MII_CFG1_SLEEP_CONFIRM BIT(6)
#define MII_CFG1_LED_MODE_MASK GENMASK(5, 4)
#define MII_CFG1_LED_MODE_LINKUP 0
#define MII_CFG1_LED_ENABLE BIT(3)
#define MII_CFG2 19
#define MII_CFG2_SLEEP_REQUEST_TO GENMASK(1, 0)
#define MII_CFG2_SLEEP_REQUEST_TO_16MS 0x3
#define MII_INTSRC 21
#define MII_INTSRC_LINK_FAIL BIT(10)
#define MII_INTSRC_LINK_UP BIT(9)
#define MII_INTSRC_MASK (MII_INTSRC_LINK_FAIL | \
MII_INTSRC_LINK_UP)
#define MII_INTSRC_UV_ERR BIT(3)
#define MII_INTSRC_TEMP_ERR BIT(1)
#define MII_INTEN 22
#define MII_INTEN_LINK_FAIL BIT(10)
#define MII_INTEN_LINK_UP BIT(9)
#define MII_INTEN_UV_ERR BIT(3)
#define MII_INTEN_TEMP_ERR BIT(1)
#define MII_COMMSTAT 23
#define MII_COMMSTAT_LINK_UP BIT(15)
#define MII_COMMSTAT_SQI_STATE GENMASK(7, 5)
#define MII_COMMSTAT_SQI_MAX 7
#define MII_GENSTAT 24
#define MII_GENSTAT_PLL_LOCKED BIT(14)
#define MII_EXTSTAT 25
#define MII_EXTSTAT_SHORT_DETECT BIT(8)
#define MII_EXTSTAT_OPEN_DETECT BIT(7)
#define MII_EXTSTAT_POLARITY_DETECT BIT(6)
#define MII_COMMCFG 27
#define MII_COMMCFG_AUTO_OP BIT(15)
static inline int tja11xx_set_bits(struct phy_device *phydev, u32 regnum,
u16 val)
{
return phy_set_bits_mmd(phydev, MDIO_DEVAD_NONE, regnum, val);
}
static inline int tja11xx_clear_bits(struct phy_device *phydev, u32 regnum,
u16 val)
{
return phy_clear_bits_mmd(phydev, MDIO_DEVAD_NONE, regnum, val);
}
static inline int tja11xx_read(struct phy_device *phydev, int regnum)
{
return phy_read(phydev, MDIO_DEVAD_NONE, regnum);
}
static inline int tja11xx_modify(struct phy_device *phydev, int regnum,
u16 mask, u16 set)
{
return phy_modify(phydev, MDIO_DEVAD_NONE, regnum, mask, set);
}
static int tja11xx_check(struct phy_device *phydev, u8 reg, u16 mask, u16 set)
{
int val;
return read_poll_timeout(tja11xx_read, val, (val & mask) == set, 150,
30000, phydev, reg);
}
static int tja11xx_modify_check(struct phy_device *phydev, u8 reg,
u16 mask, u16 set)
{
int ret;
ret = tja11xx_modify(phydev, reg, mask, set);
if (ret)
return ret;
return tja11xx_check(phydev, reg, mask, set);
}
static int tja11xx_enable_reg_write(struct phy_device *phydev)
{
return tja11xx_set_bits(phydev, MII_ECTRL, MII_ECTRL_CONFIG_EN);
}
static int tja11xx_enable_link_control(struct phy_device *phydev)
{
return tja11xx_set_bits(phydev, MII_ECTRL, MII_ECTRL_LINK_CONTROL);
}
static int tja11xx_wakeup(struct phy_device *phydev)
{
int ret;
ret = tja11xx_read(phydev, MII_ECTRL);
if (ret < 0)
return ret;
switch (ret & MII_ECTRL_POWER_MODE_MASK) {
case MII_ECTRL_POWER_MODE_NO_CHANGE:
break;
case MII_ECTRL_POWER_MODE_NORMAL:
ret = tja11xx_set_bits(phydev, MII_ECTRL,
MII_ECTRL_WAKE_REQUEST);
if (ret)
return ret;
ret = tja11xx_clear_bits(phydev, MII_ECTRL,
MII_ECTRL_WAKE_REQUEST);
if (ret)
return ret;
break;
case MII_ECTRL_POWER_MODE_STANDBY:
ret = tja11xx_modify_check(phydev, MII_ECTRL,
MII_ECTRL_POWER_MODE_MASK,
MII_ECTRL_POWER_MODE_STANDBY);
if (ret)
return ret;
ret = tja11xx_modify(phydev, MII_ECTRL,
MII_ECTRL_POWER_MODE_MASK,
MII_ECTRL_POWER_MODE_NORMAL);
if (ret)
return ret;
ret = tja11xx_modify_check(phydev, MII_GENSTAT,
MII_GENSTAT_PLL_LOCKED,
MII_GENSTAT_PLL_LOCKED);
if (ret)
return ret;
return tja11xx_enable_link_control(phydev);
default:
break;
}
return 0;
}
static int tja11xx_config_init(struct phy_device *phydev)
{
int ret;
ret = tja11xx_enable_reg_write(phydev);
if (ret)
return ret;
phydev->autoneg = AUTONEG_DISABLE;
phydev->speed = SPEED_100;
phydev->duplex = DUPLEX_FULL;
switch (phydev->phy_id & PHY_ID_MASK) {
case PHY_ID_TJA1100:
ret = tja11xx_modify(phydev, MII_CFG1,
MII_CFG1_AUTO_OP | MII_CFG1_LED_MODE_MASK |
MII_CFG1_LED_ENABLE,
MII_CFG1_AUTO_OP |
MII_CFG1_LED_MODE_LINKUP |
MII_CFG1_LED_ENABLE);
if (ret)
return ret;
break;
case PHY_ID_TJA1101:
ret = tja11xx_set_bits(phydev, MII_COMMCFG,
MII_COMMCFG_AUTO_OP);
if (ret)
return ret;
break;
default:
return -EINVAL;
}
ret = tja11xx_clear_bits(phydev, MII_CFG1, MII_CFG1_SLEEP_CONFIRM);
if (ret)
return ret;
ret = tja11xx_modify(phydev, MII_CFG2, MII_CFG2_SLEEP_REQUEST_TO,
MII_CFG2_SLEEP_REQUEST_TO_16MS);
if (ret)
return ret;
ret = tja11xx_wakeup(phydev);
if (ret < 0)
return ret;
/* ACK interrupts by reading the status register */
ret = tja11xx_read(phydev, MII_INTSRC);
if (ret < 0)
return ret;
return 0;
}
static int tja11xx_startup(struct phy_device *phydev)
{
int ret;
ret = genphy_update_link(phydev);
if (ret)
return ret;
ret = tja11xx_read(phydev, MII_CFG1);
if (ret < 0)
return ret;
if (phydev->link) {
ret = tja11xx_read(phydev, MII_COMMSTAT);
if (ret < 0)
return ret;
if (!(ret & MII_COMMSTAT_LINK_UP))
phydev->link = 0;
}
return 0;
}
U_BOOT_PHY_DRIVER(tja1100) = {
.name = "NXP TJA1100",
.uid = PHY_ID_TJA1100,
.mask = PHY_ID_MASK,
.features = PHY_BASIC_FEATURES,
.config = &tja11xx_config_init,
.startup = &tja11xx_startup,
.shutdown = &genphy_shutdown,
};
U_BOOT_PHY_DRIVER(tja1101) = {
.name = "NXP TJA1101",
.uid = PHY_ID_TJA1101,
.mask = PHY_ID_MASK,
.features = PHY_BASIC_FEATURES,
.config = &tja11xx_config_init,
.startup = &tja11xx_startup,
.shutdown = &genphy_shutdown,
};
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