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u-boot/drivers/net/phy/micrel_ksz90x1.c
Marek Vasut b5f09df246 net: phy: micrel: Try default PHY ofnode first 
The phydev structure has a PHY OF node pointer in it, use that OF node
first when looking up PHY OF node properties, since that is likely the
correct PHY OF node pointer. If the pointer is not valid, which is the
case e.g. on legacy DTs, fall back to parsing MAC ethernet-phy subnode.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
2021-01-27 10:47:54 -05:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Micrel PHY drivers
*
* Copyright 2010-2011 Freescale Semiconductor, Inc.
* author Andy Fleming
* (C) 2012 NetModule AG, David Andrey, added KSZ9031
* (C) Copyright 2017 Adaptrum, Inc.
* Written by Alexandru Gagniuc <alex.g@adaptrum.com> for Adaptrum, Inc.
*/
#include <common.h>
#include <dm.h>
#include <env.h>
#include <errno.h>
#include <micrel.h>
#include <phy.h>
/*
* KSZ9021 - KSZ9031 common
*/
#define MII_KSZ90xx_PHY_CTL 0x1f
#define MIIM_KSZ90xx_PHYCTL_1000 (1 << 6)
#define MIIM_KSZ90xx_PHYCTL_100 (1 << 5)
#define MIIM_KSZ90xx_PHYCTL_10 (1 << 4)
#define MIIM_KSZ90xx_PHYCTL_DUPLEX (1 << 3)
/* KSZ9021 PHY Registers */
#define MII_KSZ9021_EXTENDED_CTRL 0x0b
#define MII_KSZ9021_EXTENDED_DATAW 0x0c
#define MII_KSZ9021_EXTENDED_DATAR 0x0d
#define CTRL1000_PREFER_MASTER (1 << 10)
#define CTRL1000_CONFIG_MASTER (1 << 11)
#define CTRL1000_MANUAL_CONFIG (1 << 12)
#define KSZ9021_PS_TO_REG 120
/* KSZ9031 PHY Registers */
#define MII_KSZ9031_MMD_ACCES_CTRL 0x0d
#define MII_KSZ9031_MMD_REG_DATA 0x0e
#define KSZ9031_PS_TO_REG 60
static int ksz90xx_startup(struct phy_device *phydev)
{
unsigned phy_ctl;
int ret;
ret = genphy_update_link(phydev);
if (ret)
return ret;
phy_ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ90xx_PHY_CTL);
if (phy_ctl & MIIM_KSZ90xx_PHYCTL_DUPLEX)
phydev->duplex = DUPLEX_FULL;
else
phydev->duplex = DUPLEX_HALF;
if (phy_ctl & MIIM_KSZ90xx_PHYCTL_1000)
phydev->speed = SPEED_1000;
else if (phy_ctl & MIIM_KSZ90xx_PHYCTL_100)
phydev->speed = SPEED_100;
else if (phy_ctl & MIIM_KSZ90xx_PHYCTL_10)
phydev->speed = SPEED_10;
return 0;
}
/* Common OF config bits for KSZ9021 and KSZ9031 */
#ifdef CONFIG_DM_ETH
struct ksz90x1_reg_field {
const char *name;
const u8 size; /* Size of the bitfield, in bits */
const u8 off; /* Offset from bit 0 */
const u8 dflt; /* Default value */
};
struct ksz90x1_ofcfg {
const u16 reg;
const u16 devad;
const struct ksz90x1_reg_field *grp;
const u16 grpsz;
};
static const struct ksz90x1_reg_field ksz90x1_rxd_grp[] = {
{ "rxd0-skew-ps", 4, 0, 0x7 }, { "rxd1-skew-ps", 4, 4, 0x7 },
{ "rxd2-skew-ps", 4, 8, 0x7 }, { "rxd3-skew-ps", 4, 12, 0x7 }
};
static const struct ksz90x1_reg_field ksz90x1_txd_grp[] = {
{ "txd0-skew-ps", 4, 0, 0x7 }, { "txd1-skew-ps", 4, 4, 0x7 },
{ "txd2-skew-ps", 4, 8, 0x7 }, { "txd3-skew-ps", 4, 12, 0x7 },
};
static const struct ksz90x1_reg_field ksz9021_clk_grp[] = {
{ "txen-skew-ps", 4, 0, 0x7 }, { "txc-skew-ps", 4, 4, 0x7 },
{ "rxdv-skew-ps", 4, 8, 0x7 }, { "rxc-skew-ps", 4, 12, 0x7 },
};
static const struct ksz90x1_reg_field ksz9031_ctl_grp[] = {
{ "txen-skew-ps", 4, 0, 0x7 }, { "rxdv-skew-ps", 4, 4, 0x7 }
};
static const struct ksz90x1_reg_field ksz9031_clk_grp[] = {
{ "rxc-skew-ps", 5, 0, 0xf }, { "txc-skew-ps", 5, 5, 0xf }
};
static int ksz90x1_of_config_group(struct phy_device *phydev,
struct ksz90x1_ofcfg *ofcfg,
int ps_to_regval)
{
struct udevice *dev = phydev->dev;
struct phy_driver *drv = phydev->drv;
int val[4];
int i, changed = 0, offset, max;
u16 regval = 0;
ofnode node;
if (!drv || !drv->writeext)
return -EOPNOTSUPP;
node = phydev->node;
if (!ofnode_valid(node)) {
/* Look for a PHY node under the Ethernet node */
node = dev_read_subnode(dev, "ethernet-phy");
}
if (!ofnode_valid(node)) {
/* No node found, look in the Ethernet node */
node = dev_ofnode(dev);
}
for (i = 0; i < ofcfg->grpsz; i++) {
val[i] = ofnode_read_u32_default(node, ofcfg->grp[i].name, ~0);
offset = ofcfg->grp[i].off;
if (val[i] == -1) {
/* Default register value for KSZ9021 */
regval |= ofcfg->grp[i].dflt << offset;
} else {
changed = 1; /* Value was changed in OF */
/* Calculate the register value and fix corner cases */
max = (1 << ofcfg->grp[i].size) - 1;
if (val[i] > ps_to_regval * max) {
regval |= max << offset;
} else {
regval |= (val[i] / ps_to_regval) << offset;
}
}
}
if (!changed)
return 0;
return drv->writeext(phydev, 0, ofcfg->devad, ofcfg->reg, regval);
}
static int ksz9021_of_config(struct phy_device *phydev)
{
struct ksz90x1_ofcfg ofcfg[] = {
{ MII_KSZ9021_EXT_RGMII_RX_DATA_SKEW, 0, ksz90x1_rxd_grp, 4 },
{ MII_KSZ9021_EXT_RGMII_TX_DATA_SKEW, 0, ksz90x1_txd_grp, 4 },
{ MII_KSZ9021_EXT_RGMII_CLOCK_SKEW, 0, ksz9021_clk_grp, 4 },
};
int i, ret = 0;
for (i = 0; i < ARRAY_SIZE(ofcfg); i++) {
ret = ksz90x1_of_config_group(phydev, &ofcfg[i],
KSZ9021_PS_TO_REG);
if (ret)
return ret;
}
return 0;
}
static int ksz9031_of_config(struct phy_device *phydev)
{
struct ksz90x1_ofcfg ofcfg[] = {
{ MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW, 2, ksz9031_ctl_grp, 2 },
{ MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW, 2, ksz90x1_rxd_grp, 4 },
{ MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW, 2, ksz90x1_txd_grp, 4 },
{ MII_KSZ9031_EXT_RGMII_CLOCK_SKEW, 2, ksz9031_clk_grp, 2 },
};
int i, ret = 0;
for (i = 0; i < ARRAY_SIZE(ofcfg); i++) {
ret = ksz90x1_of_config_group(phydev, &ofcfg[i],
KSZ9031_PS_TO_REG);
if (ret)
return ret;
}
return 0;
}
static int ksz9031_center_flp_timing(struct phy_device *phydev)
{
struct phy_driver *drv = phydev->drv;
int ret = 0;
if (!drv || !drv->writeext)
return -EOPNOTSUPP;
ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_LO, 0x1A80);
if (ret)
return ret;
ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_HI, 0x6);
return ret;
}
#else /* !CONFIG_DM_ETH */
static int ksz9021_of_config(struct phy_device *phydev)
{
return 0;
}
static int ksz9031_of_config(struct phy_device *phydev)
{
return 0;
}
static int ksz9031_center_flp_timing(struct phy_device *phydev)
{
return 0;
}
#endif
/*
* KSZ9021
*/
int ksz9021_phy_extended_write(struct phy_device *phydev, int regnum, u16 val)
{
/* extended registers */
phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9021_EXTENDED_CTRL, regnum | 0x8000);
return phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9021_EXTENDED_DATAW, val);
}
int ksz9021_phy_extended_read(struct phy_device *phydev, int regnum)
{
/* extended registers */
phy_write(phydev, MDIO_DEVAD_NONE, MII_KSZ9021_EXTENDED_CTRL, regnum);
return phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ9021_EXTENDED_DATAR);
}
static int ksz9021_phy_extread(struct phy_device *phydev, int addr, int devaddr,
int regnum)
{
return ksz9021_phy_extended_read(phydev, regnum);
}
static int ksz9021_phy_extwrite(struct phy_device *phydev, int addr,
int devaddr, int regnum, u16 val)
{
return ksz9021_phy_extended_write(phydev, regnum, val);
}
static int ksz9021_config(struct phy_device *phydev)
{
unsigned ctrl1000 = 0;
const unsigned master = CTRL1000_PREFER_MASTER |
CTRL1000_CONFIG_MASTER | CTRL1000_MANUAL_CONFIG;
unsigned features = phydev->drv->features;
int ret;
ret = ksz9021_of_config(phydev);
if (ret)
return ret;
if (env_get("disable_giga"))
features &= ~(SUPPORTED_1000baseT_Half |
SUPPORTED_1000baseT_Full);
/* force master mode for 1000BaseT due to chip errata */
if (features & SUPPORTED_1000baseT_Half)
ctrl1000 |= ADVERTISE_1000HALF | master;
if (features & SUPPORTED_1000baseT_Full)
ctrl1000 |= ADVERTISE_1000FULL | master;
phydev->advertising = features;
phydev->supported = features;
phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, ctrl1000);
genphy_config_aneg(phydev);
genphy_restart_aneg(phydev);
return 0;
}
static struct phy_driver ksz9021_driver = {
.name = "Micrel ksz9021",
.uid = 0x221610,
.mask = 0xfffffe,
.features = PHY_GBIT_FEATURES,
.config = &ksz9021_config,
.startup = &ksz90xx_startup,
.shutdown = &genphy_shutdown,
.writeext = &ksz9021_phy_extwrite,
.readext = &ksz9021_phy_extread,
};
/*
* KSZ9031
*/
int ksz9031_phy_extended_write(struct phy_device *phydev,
int devaddr, int regnum, u16 mode, u16 val)
{
/*select register addr for mmd*/
phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9031_MMD_ACCES_CTRL, devaddr);
/*select register for mmd*/
phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9031_MMD_REG_DATA, regnum);
/*setup mode*/
phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9031_MMD_ACCES_CTRL, (mode | devaddr));
/*write the value*/
return phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9031_MMD_REG_DATA, val);
}
int ksz9031_phy_extended_read(struct phy_device *phydev, int devaddr,
int regnum, u16 mode)
{
phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9031_MMD_ACCES_CTRL, devaddr);
phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9031_MMD_REG_DATA, regnum);
phy_write(phydev, MDIO_DEVAD_NONE,
MII_KSZ9031_MMD_ACCES_CTRL, (devaddr | mode));
return phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ9031_MMD_REG_DATA);
}
static int ksz9031_phy_extread(struct phy_device *phydev, int addr, int devaddr,
int regnum)
{
return ksz9031_phy_extended_read(phydev, devaddr, regnum,
MII_KSZ9031_MOD_DATA_NO_POST_INC);
}
static int ksz9031_phy_extwrite(struct phy_device *phydev, int addr,
int devaddr, int regnum, u16 val)
{
return ksz9031_phy_extended_write(phydev, devaddr, regnum,
MII_KSZ9031_MOD_DATA_POST_INC_RW, val);
}
static int ksz9031_config(struct phy_device *phydev)
{
int ret;
ret = ksz9031_of_config(phydev);
if (ret)
return ret;
ret = ksz9031_center_flp_timing(phydev);
if (ret)
return ret;
/* add an option to disable the gigabit feature of this PHY */
if (env_get("disable_giga")) {
unsigned features;
unsigned bmcr;
/* disable speed 1000 in features supported by the PHY */
features = phydev->drv->features;
features &= ~(SUPPORTED_1000baseT_Half |
SUPPORTED_1000baseT_Full);
phydev->advertising = phydev->supported = features;
/* disable speed 1000 in Basic Control Register */
bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
bmcr &= ~(1 << 6);
phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, bmcr);
/* disable speed 1000 in 1000Base-T Control Register */
phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, 0);
/* start autoneg */
genphy_config_aneg(phydev);
genphy_restart_aneg(phydev);
return 0;
}
return genphy_config(phydev);
}
static struct phy_driver ksz9031_driver = {
.name = "Micrel ksz9031",
.uid = PHY_ID_KSZ9031,
.mask = MII_KSZ9x31_SILICON_REV_MASK,
.features = PHY_GBIT_FEATURES,
.config = &ksz9031_config,
.startup = &ksz90xx_startup,
.shutdown = &genphy_shutdown,
.writeext = &ksz9031_phy_extwrite,
.readext = &ksz9031_phy_extread,
};
/*
* KSZ9131
*/
#define KSZ9131RN_MMD_COMMON_CTRL_REG 2
#define KSZ9131RN_RXC_DLL_CTRL 76
#define KSZ9131RN_TXC_DLL_CTRL 77
#define KSZ9131RN_DLL_CTRL_BYPASS BIT_MASK(12)
#define KSZ9131RN_DLL_ENABLE_DELAY 0
#define KSZ9131RN_DLL_DISABLE_DELAY BIT(12)
static int ksz9131_config_rgmii_delay(struct phy_device *phydev)
{
struct phy_driver *drv = phydev->drv;
u16 rxcdll_val, txcdll_val, val;
int ret;
switch (phydev->interface) {
case PHY_INTERFACE_MODE_RGMII:
rxcdll_val = KSZ9131RN_DLL_DISABLE_DELAY;
txcdll_val = KSZ9131RN_DLL_DISABLE_DELAY;
break;
case PHY_INTERFACE_MODE_RGMII_ID:
rxcdll_val = KSZ9131RN_DLL_ENABLE_DELAY;
txcdll_val = KSZ9131RN_DLL_ENABLE_DELAY;
break;
case PHY_INTERFACE_MODE_RGMII_RXID:
rxcdll_val = KSZ9131RN_DLL_ENABLE_DELAY;
txcdll_val = KSZ9131RN_DLL_DISABLE_DELAY;
break;
case PHY_INTERFACE_MODE_RGMII_TXID:
rxcdll_val = KSZ9131RN_DLL_DISABLE_DELAY;
txcdll_val = KSZ9131RN_DLL_ENABLE_DELAY;
break;
default:
return 0;
}
val = drv->readext(phydev, 0, KSZ9131RN_MMD_COMMON_CTRL_REG,
KSZ9131RN_RXC_DLL_CTRL);
val &= ~KSZ9131RN_DLL_CTRL_BYPASS;
val |= rxcdll_val;
ret = drv->writeext(phydev, 0, KSZ9131RN_MMD_COMMON_CTRL_REG,
KSZ9131RN_RXC_DLL_CTRL, val);
if (ret)
return ret;
val = drv->readext(phydev, 0, KSZ9131RN_MMD_COMMON_CTRL_REG,
KSZ9131RN_TXC_DLL_CTRL);
val &= ~KSZ9131RN_DLL_CTRL_BYPASS;
val |= txcdll_val;
ret = drv->writeext(phydev, 0, KSZ9131RN_MMD_COMMON_CTRL_REG,
KSZ9131RN_TXC_DLL_CTRL, val);
return ret;
}
static int ksz9131_config(struct phy_device *phydev)
{
int ret;
if (phy_interface_is_rgmii(phydev)) {
ret = ksz9131_config_rgmii_delay(phydev);
if (ret)
return ret;
}
/* add an option to disable the gigabit feature of this PHY */
if (env_get("disable_giga")) {
unsigned features;
unsigned bmcr;
/* disable speed 1000 in features supported by the PHY */
features = phydev->drv->features;
features &= ~(SUPPORTED_1000baseT_Half |
SUPPORTED_1000baseT_Full);
phydev->advertising = phydev->supported = features;
/* disable speed 1000 in Basic Control Register */
bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
bmcr &= ~(1 << 6);
phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, bmcr);
/* disable speed 1000 in 1000Base-T Control Register */
phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, 0);
/* start autoneg */
genphy_config_aneg(phydev);
genphy_restart_aneg(phydev);
return 0;
}
return genphy_config(phydev);
}
static struct phy_driver ksz9131_driver = {
.name = "Micrel ksz9131",
.uid = PHY_ID_KSZ9131,
.mask = MII_KSZ9x31_SILICON_REV_MASK,
.features = PHY_GBIT_FEATURES,
.config = &ksz9131_config,
.startup = &ksz90xx_startup,
.shutdown = &genphy_shutdown,
.writeext = &ksz9031_phy_extwrite,
.readext = &ksz9031_phy_extread,
};
int ksz9xx1_phy_get_id(struct phy_device *phydev)
{
unsigned int phyid;
get_phy_id(phydev->bus, phydev->addr, MDIO_DEVAD_NONE, &phyid);
return phyid;
}
int phy_micrel_ksz90x1_init(void)
{
phy_register(&ksz9021_driver);
phy_register(&ksz9031_driver);
phy_register(&ksz9131_driver);
return 0;
}
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