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/*
* TI PHY drivers
*
* SPDX-License-Identifier: GPL-2.0
*
*/
#include <common.h>
#include <phy.h>
/* TI DP83867 */
#define DP83867_DEVADDR 0x1f
#define MII_DP83867_PHYCTRL 0x10
#define MII_DP83867_MICR 0x12
#define DP83867_CTRL 0x1f
/* Extended Registers */
#define DP83867_RGMIICTL 0x0032
#define DP83867_RGMIIDCTL 0x0086
#define DP83867_SW_RESET BIT(15)
#define DP83867_SW_RESTART BIT(14)
/* MICR Interrupt bits */
#define MII_DP83867_MICR_AN_ERR_INT_EN BIT(15)
#define MII_DP83867_MICR_SPEED_CHNG_INT_EN BIT(14)
#define MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN BIT(13)
#define MII_DP83867_MICR_PAGE_RXD_INT_EN BIT(12)
#define MII_DP83867_MICR_AUTONEG_COMP_INT_EN BIT(11)
#define MII_DP83867_MICR_LINK_STS_CHNG_INT_EN BIT(10)
#define MII_DP83867_MICR_FALSE_CARRIER_INT_EN BIT(8)
#define MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
#define MII_DP83867_MICR_WOL_INT_EN BIT(3)
#define MII_DP83867_MICR_XGMII_ERR_INT_EN BIT(2)
#define MII_DP83867_MICR_POL_CHNG_INT_EN BIT(1)
#define MII_DP83867_MICR_JABBER_INT_EN BIT(0)
/* RGMIICTL bits */
#define DP83867_RGMII_TX_CLK_DELAY_EN BIT(1)
#define DP83867_RGMII_RX_CLK_DELAY_EN BIT(0)
/* PHY CTRL bits */
#define DP83867_PHYCR_FIFO_DEPTH_SHIFT 14
#define DP83867_MDI_CROSSOVER 5
#define DP83867_MDI_CROSSOVER_AUTO 2
/* RGMIIDCTL bits */
#define DP83867_RGMII_TX_CLK_DELAY_SHIFT 4
#define MII_MMD_CTRL 0x0d /* MMD Access Control Register */
#define MII_MMD_DATA 0x0e /* MMD Access Data Register */
/* MMD Access Control register fields */
#define MII_MMD_CTRL_DEVAD_MASK 0x1f /* Mask MMD DEVAD*/
#define MII_MMD_CTRL_ADDR 0x0000 /* Address */
#define MII_MMD_CTRL_NOINCR 0x4000 /* no post increment */
#define MII_MMD_CTRL_INCR_RDWT 0x8000 /* post increment on reads & writes */
#define MII_MMD_CTRL_INCR_ON_WT 0xC000 /* post increment on writes only */
/**
* phy_read_mmd_indirect - reads data from the MMD registers
* @phydev: The PHY device bus
* @prtad: MMD Address
* @devad: MMD DEVAD
* @addr: PHY address on the MII bus
*
* Description: it reads data from the MMD registers (clause 22 to access to
* clause 45) of the specified phy address.
* To read these registers we have:
* 1) Write reg 13 // DEVAD
* 2) Write reg 14 // MMD Address
* 3) Write reg 13 // MMD Data Command for MMD DEVAD
* 3) Read reg 14 // Read MMD data
*/
int phy_read_mmd_indirect(struct phy_device *phydev, int prtad,
int devad, int addr)
{
int value = -1;
/* Write the desired MMD Devad */
phy_write(phydev, addr, MII_MMD_CTRL, devad);
/* Write the desired MMD register address */
phy_write(phydev, addr, MII_MMD_DATA, prtad);
/* Select the Function : DATA with no post increment */
phy_write(phydev, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
/* Read the content of the MMD's selected register */
value = phy_read(phydev, addr, MII_MMD_DATA);
return value;
}
/**
* phy_write_mmd_indirect - writes data to the MMD registers
* @phydev: The PHY device
* @prtad: MMD Address
* @devad: MMD DEVAD
* @addr: PHY address on the MII bus
* @data: data to write in the MMD register
*
* Description: Write data from the MMD registers of the specified
* phy address.
* To write these registers we have:
* 1) Write reg 13 // DEVAD
* 2) Write reg 14 // MMD Address
* 3) Write reg 13 // MMD Data Command for MMD DEVAD
* 3) Write reg 14 // Write MMD data
*/
void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
int devad, int addr, u32 data)
{
/* Write the desired MMD Devad */
phy_write(phydev, addr, MII_MMD_CTRL, devad);
/* Write the desired MMD register address */
phy_write(phydev, addr, MII_MMD_DATA, prtad);
/* Select the Function : DATA with no post increment */
phy_write(phydev, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
/* Write the data into MMD's selected register */
phy_write(phydev, addr, MII_MMD_DATA, data);
}
/**
* phy_interface_is_rgmii - Convenience function for testing if a PHY interface
* is RGMII (all variants)
* @phydev: the phy_device struct
*/
static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
{
return phydev->interface >= PHY_INTERFACE_MODE_RGMII &&
phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
}
/* User setting - can be taken from DTS */
#define RX_ID_DELAY 8
#define TX_ID_DELAY 0xa
#define FIFO_DEPTH 1
static int dp83867_config(struct phy_device *phydev)
{
unsigned int val, delay;
int ret;
/* Restart the PHY. */
val = phy_read(phydev, MDIO_DEVAD_NONE, DP83867_CTRL);
phy_write(phydev, MDIO_DEVAD_NONE, DP83867_CTRL,
val | DP83867_SW_RESTART);
if (phy_interface_is_rgmii(phydev)) {
ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL,
(DP83867_MDI_CROSSOVER_AUTO << DP83867_MDI_CROSSOVER) |
(FIFO_DEPTH << DP83867_PHYCR_FIFO_DEPTH_SHIFT));
if (ret)
return ret;
}
if ((phydev->interface >= PHY_INTERFACE_MODE_RGMII_ID) &&
(phydev->interface <= PHY_INTERFACE_MODE_RGMII_RXID)) {
val = phy_read_mmd_indirect(phydev, DP83867_RGMIICTL,
DP83867_DEVADDR, phydev->addr);
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
val |= (DP83867_RGMII_TX_CLK_DELAY_EN |
DP83867_RGMII_RX_CLK_DELAY_EN);
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
val |= DP83867_RGMII_TX_CLK_DELAY_EN;
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
val |= DP83867_RGMII_RX_CLK_DELAY_EN;
phy_write_mmd_indirect(phydev, DP83867_RGMIICTL,
DP83867_DEVADDR, phydev->addr, val);
delay = (RX_ID_DELAY |
(TX_ID_DELAY << DP83867_RGMII_TX_CLK_DELAY_SHIFT));
phy_write_mmd_indirect(phydev, DP83867_RGMIIDCTL,
DP83867_DEVADDR, phydev->addr, delay);
}
genphy_config_aneg(phydev);
return 0;
}
static struct phy_driver DP83867_driver = {
.name = "TI DP83867",
.uid = 0x2000a231,
.mask = 0xfffffff0,
.features = PHY_GBIT_FEATURES,
.config = &dp83867_config,
.startup = &genphy_startup,
.shutdown = &genphy_shutdown,
};
int phy_ti_init(void)
{
phy_register(&DP83867_driver);
return 0;
}
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