569 lines
13 KiB
C
569 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* drivers/net/ethernet/ibm/emac/phy.c
|
|
*
|
|
* Driver for PowerPC 4xx on-chip ethernet controller, PHY support.
|
|
* Borrowed from sungem_phy.c, though I only kept the generic MII
|
|
* driver for now.
|
|
*
|
|
* This file should be shared with other drivers or eventually
|
|
* merged as the "low level" part of miilib
|
|
*
|
|
* Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
|
|
* <benh@kernel.crashing.org>
|
|
*
|
|
* Based on the arch/ppc version of the driver:
|
|
*
|
|
* (c) 2003, Benjamin Herrenscmidt (benh@kernel.crashing.org)
|
|
* (c) 2004-2005, Eugene Surovegin <ebs@ebshome.net>
|
|
*
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/mii.h>
|
|
#include <linux/ethtool.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include "emac.h"
|
|
#include "phy.h"
|
|
|
|
#define phy_read _phy_read
|
|
#define phy_write _phy_write
|
|
|
|
static inline int _phy_read(struct mii_phy *phy, int reg)
|
|
{
|
|
return phy->mdio_read(phy->dev, phy->address, reg);
|
|
}
|
|
|
|
static inline void _phy_write(struct mii_phy *phy, int reg, int val)
|
|
{
|
|
phy->mdio_write(phy->dev, phy->address, reg, val);
|
|
}
|
|
|
|
static inline int gpcs_phy_read(struct mii_phy *phy, int reg)
|
|
{
|
|
return phy->mdio_read(phy->dev, phy->gpcs_address, reg);
|
|
}
|
|
|
|
static inline void gpcs_phy_write(struct mii_phy *phy, int reg, int val)
|
|
{
|
|
phy->mdio_write(phy->dev, phy->gpcs_address, reg, val);
|
|
}
|
|
|
|
int emac_mii_reset_phy(struct mii_phy *phy)
|
|
{
|
|
int val;
|
|
int limit = 10000;
|
|
|
|
val = phy_read(phy, MII_BMCR);
|
|
val &= ~(BMCR_ISOLATE | BMCR_ANENABLE);
|
|
val |= BMCR_RESET;
|
|
phy_write(phy, MII_BMCR, val);
|
|
|
|
udelay(300);
|
|
|
|
while (--limit) {
|
|
val = phy_read(phy, MII_BMCR);
|
|
if (val >= 0 && (val & BMCR_RESET) == 0)
|
|
break;
|
|
udelay(10);
|
|
}
|
|
if ((val & BMCR_ISOLATE) && limit > 0)
|
|
phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE);
|
|
|
|
return limit <= 0;
|
|
}
|
|
|
|
int emac_mii_reset_gpcs(struct mii_phy *phy)
|
|
{
|
|
int val;
|
|
int limit = 10000;
|
|
|
|
val = gpcs_phy_read(phy, MII_BMCR);
|
|
val &= ~(BMCR_ISOLATE | BMCR_ANENABLE);
|
|
val |= BMCR_RESET;
|
|
gpcs_phy_write(phy, MII_BMCR, val);
|
|
|
|
udelay(300);
|
|
|
|
while (--limit) {
|
|
val = gpcs_phy_read(phy, MII_BMCR);
|
|
if (val >= 0 && (val & BMCR_RESET) == 0)
|
|
break;
|
|
udelay(10);
|
|
}
|
|
if ((val & BMCR_ISOLATE) && limit > 0)
|
|
gpcs_phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE);
|
|
|
|
if (limit > 0 && phy->mode == PHY_INTERFACE_MODE_SGMII) {
|
|
/* Configure GPCS interface to recommended setting for SGMII */
|
|
gpcs_phy_write(phy, 0x04, 0x8120); /* AsymPause, FDX */
|
|
gpcs_phy_write(phy, 0x07, 0x2801); /* msg_pg, toggle */
|
|
gpcs_phy_write(phy, 0x00, 0x0140); /* 1Gbps, FDX */
|
|
}
|
|
|
|
return limit <= 0;
|
|
}
|
|
|
|
static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise)
|
|
{
|
|
int ctl, adv;
|
|
|
|
phy->autoneg = AUTONEG_ENABLE;
|
|
phy->speed = SPEED_10;
|
|
phy->duplex = DUPLEX_HALF;
|
|
phy->pause = phy->asym_pause = 0;
|
|
phy->advertising = advertise;
|
|
|
|
ctl = phy_read(phy, MII_BMCR);
|
|
if (ctl < 0)
|
|
return ctl;
|
|
ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
|
|
|
|
/* First clear the PHY */
|
|
phy_write(phy, MII_BMCR, ctl);
|
|
|
|
/* Setup standard advertise */
|
|
adv = phy_read(phy, MII_ADVERTISE);
|
|
if (adv < 0)
|
|
return adv;
|
|
adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
|
|
ADVERTISE_PAUSE_ASYM);
|
|
if (advertise & ADVERTISED_10baseT_Half)
|
|
adv |= ADVERTISE_10HALF;
|
|
if (advertise & ADVERTISED_10baseT_Full)
|
|
adv |= ADVERTISE_10FULL;
|
|
if (advertise & ADVERTISED_100baseT_Half)
|
|
adv |= ADVERTISE_100HALF;
|
|
if (advertise & ADVERTISED_100baseT_Full)
|
|
adv |= ADVERTISE_100FULL;
|
|
if (advertise & ADVERTISED_Pause)
|
|
adv |= ADVERTISE_PAUSE_CAP;
|
|
if (advertise & ADVERTISED_Asym_Pause)
|
|
adv |= ADVERTISE_PAUSE_ASYM;
|
|
phy_write(phy, MII_ADVERTISE, adv);
|
|
|
|
if (phy->features &
|
|
(SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half)) {
|
|
adv = phy_read(phy, MII_CTRL1000);
|
|
if (adv < 0)
|
|
return adv;
|
|
adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
|
|
if (advertise & ADVERTISED_1000baseT_Full)
|
|
adv |= ADVERTISE_1000FULL;
|
|
if (advertise & ADVERTISED_1000baseT_Half)
|
|
adv |= ADVERTISE_1000HALF;
|
|
phy_write(phy, MII_CTRL1000, adv);
|
|
}
|
|
|
|
/* Start/Restart aneg */
|
|
ctl = phy_read(phy, MII_BMCR);
|
|
ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
|
|
phy_write(phy, MII_BMCR, ctl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int genmii_setup_forced(struct mii_phy *phy, int speed, int fd)
|
|
{
|
|
int ctl;
|
|
|
|
phy->autoneg = AUTONEG_DISABLE;
|
|
phy->speed = speed;
|
|
phy->duplex = fd;
|
|
phy->pause = phy->asym_pause = 0;
|
|
|
|
ctl = phy_read(phy, MII_BMCR);
|
|
if (ctl < 0)
|
|
return ctl;
|
|
ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
|
|
|
|
/* First clear the PHY */
|
|
phy_write(phy, MII_BMCR, ctl | BMCR_RESET);
|
|
|
|
/* Select speed & duplex */
|
|
switch (speed) {
|
|
case SPEED_10:
|
|
break;
|
|
case SPEED_100:
|
|
ctl |= BMCR_SPEED100;
|
|
break;
|
|
case SPEED_1000:
|
|
ctl |= BMCR_SPEED1000;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
if (fd == DUPLEX_FULL)
|
|
ctl |= BMCR_FULLDPLX;
|
|
phy_write(phy, MII_BMCR, ctl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int genmii_poll_link(struct mii_phy *phy)
|
|
{
|
|
int status;
|
|
|
|
/* Clear latched value with dummy read */
|
|
phy_read(phy, MII_BMSR);
|
|
status = phy_read(phy, MII_BMSR);
|
|
if (status < 0 || (status & BMSR_LSTATUS) == 0)
|
|
return 0;
|
|
if (phy->autoneg == AUTONEG_ENABLE && !(status & BMSR_ANEGCOMPLETE))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static int genmii_read_link(struct mii_phy *phy)
|
|
{
|
|
if (phy->autoneg == AUTONEG_ENABLE) {
|
|
int glpa = 0;
|
|
int lpa = phy_read(phy, MII_LPA) & phy_read(phy, MII_ADVERTISE);
|
|
if (lpa < 0)
|
|
return lpa;
|
|
|
|
if (phy->features &
|
|
(SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half)) {
|
|
int adv = phy_read(phy, MII_CTRL1000);
|
|
glpa = phy_read(phy, MII_STAT1000);
|
|
|
|
if (glpa < 0 || adv < 0)
|
|
return adv;
|
|
|
|
glpa &= adv << 2;
|
|
}
|
|
|
|
phy->speed = SPEED_10;
|
|
phy->duplex = DUPLEX_HALF;
|
|
phy->pause = phy->asym_pause = 0;
|
|
|
|
if (glpa & (LPA_1000FULL | LPA_1000HALF)) {
|
|
phy->speed = SPEED_1000;
|
|
if (glpa & LPA_1000FULL)
|
|
phy->duplex = DUPLEX_FULL;
|
|
} else if (lpa & (LPA_100FULL | LPA_100HALF)) {
|
|
phy->speed = SPEED_100;
|
|
if (lpa & LPA_100FULL)
|
|
phy->duplex = DUPLEX_FULL;
|
|
} else if (lpa & LPA_10FULL)
|
|
phy->duplex = DUPLEX_FULL;
|
|
|
|
if (phy->duplex == DUPLEX_FULL) {
|
|
phy->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
|
|
phy->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
|
|
}
|
|
} else {
|
|
int bmcr = phy_read(phy, MII_BMCR);
|
|
if (bmcr < 0)
|
|
return bmcr;
|
|
|
|
if (bmcr & BMCR_FULLDPLX)
|
|
phy->duplex = DUPLEX_FULL;
|
|
else
|
|
phy->duplex = DUPLEX_HALF;
|
|
if (bmcr & BMCR_SPEED1000)
|
|
phy->speed = SPEED_1000;
|
|
else if (bmcr & BMCR_SPEED100)
|
|
phy->speed = SPEED_100;
|
|
else
|
|
phy->speed = SPEED_10;
|
|
|
|
phy->pause = phy->asym_pause = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Generic implementation for most 10/100/1000 PHYs */
|
|
static const struct mii_phy_ops generic_phy_ops = {
|
|
.setup_aneg = genmii_setup_aneg,
|
|
.setup_forced = genmii_setup_forced,
|
|
.poll_link = genmii_poll_link,
|
|
.read_link = genmii_read_link
|
|
};
|
|
|
|
static struct mii_phy_def genmii_phy_def = {
|
|
.phy_id = 0x00000000,
|
|
.phy_id_mask = 0x00000000,
|
|
.name = "Generic MII",
|
|
.ops = &generic_phy_ops
|
|
};
|
|
|
|
/* CIS8201 */
|
|
#define MII_CIS8201_10BTCSR 0x16
|
|
#define TENBTCSR_ECHO_DISABLE 0x2000
|
|
#define MII_CIS8201_EPCR 0x17
|
|
#define EPCR_MODE_MASK 0x3000
|
|
#define EPCR_GMII_MODE 0x0000
|
|
#define EPCR_RGMII_MODE 0x1000
|
|
#define EPCR_TBI_MODE 0x2000
|
|
#define EPCR_RTBI_MODE 0x3000
|
|
#define MII_CIS8201_ACSR 0x1c
|
|
#define ACSR_PIN_PRIO_SELECT 0x0004
|
|
|
|
static int cis8201_init(struct mii_phy *phy)
|
|
{
|
|
int epcr;
|
|
|
|
epcr = phy_read(phy, MII_CIS8201_EPCR);
|
|
if (epcr < 0)
|
|
return epcr;
|
|
|
|
epcr &= ~EPCR_MODE_MASK;
|
|
|
|
switch (phy->mode) {
|
|
case PHY_INTERFACE_MODE_TBI:
|
|
epcr |= EPCR_TBI_MODE;
|
|
break;
|
|
case PHY_INTERFACE_MODE_RTBI:
|
|
epcr |= EPCR_RTBI_MODE;
|
|
break;
|
|
case PHY_INTERFACE_MODE_GMII:
|
|
epcr |= EPCR_GMII_MODE;
|
|
break;
|
|
case PHY_INTERFACE_MODE_RGMII:
|
|
default:
|
|
epcr |= EPCR_RGMII_MODE;
|
|
}
|
|
|
|
phy_write(phy, MII_CIS8201_EPCR, epcr);
|
|
|
|
/* MII regs override strap pins */
|
|
phy_write(phy, MII_CIS8201_ACSR,
|
|
phy_read(phy, MII_CIS8201_ACSR) | ACSR_PIN_PRIO_SELECT);
|
|
|
|
/* Disable TX_EN -> CRS echo mode, otherwise 10/HDX doesn't work */
|
|
phy_write(phy, MII_CIS8201_10BTCSR,
|
|
phy_read(phy, MII_CIS8201_10BTCSR) | TENBTCSR_ECHO_DISABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct mii_phy_ops cis8201_phy_ops = {
|
|
.init = cis8201_init,
|
|
.setup_aneg = genmii_setup_aneg,
|
|
.setup_forced = genmii_setup_forced,
|
|
.poll_link = genmii_poll_link,
|
|
.read_link = genmii_read_link
|
|
};
|
|
|
|
static struct mii_phy_def cis8201_phy_def = {
|
|
.phy_id = 0x000fc410,
|
|
.phy_id_mask = 0x000ffff0,
|
|
.name = "CIS8201 Gigabit Ethernet",
|
|
.ops = &cis8201_phy_ops
|
|
};
|
|
|
|
static struct mii_phy_def bcm5248_phy_def = {
|
|
|
|
.phy_id = 0x0143bc00,
|
|
.phy_id_mask = 0x0ffffff0,
|
|
.name = "BCM5248 10/100 SMII Ethernet",
|
|
.ops = &generic_phy_ops
|
|
};
|
|
|
|
static int m88e1111_init(struct mii_phy *phy)
|
|
{
|
|
pr_debug("%s: Marvell 88E1111 Ethernet\n", __func__);
|
|
phy_write(phy, 0x14, 0x0ce3);
|
|
phy_write(phy, 0x18, 0x4101);
|
|
phy_write(phy, 0x09, 0x0e00);
|
|
phy_write(phy, 0x04, 0x01e1);
|
|
phy_write(phy, 0x00, 0x9140);
|
|
phy_write(phy, 0x00, 0x1140);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int m88e1112_init(struct mii_phy *phy)
|
|
{
|
|
/*
|
|
* Marvell 88E1112 PHY needs to have the SGMII MAC
|
|
* interace (page 2) properly configured to
|
|
* communicate with the 460EX/GT GPCS interface.
|
|
*/
|
|
|
|
u16 reg_short;
|
|
|
|
pr_debug("%s: Marvell 88E1112 Ethernet\n", __func__);
|
|
|
|
/* Set access to Page 2 */
|
|
phy_write(phy, 0x16, 0x0002);
|
|
|
|
phy_write(phy, 0x00, 0x0040); /* 1Gbps */
|
|
reg_short = (u16)(phy_read(phy, 0x1a));
|
|
reg_short |= 0x8000; /* bypass Auto-Negotiation */
|
|
phy_write(phy, 0x1a, reg_short);
|
|
emac_mii_reset_phy(phy); /* reset MAC interface */
|
|
|
|
/* Reset access to Page 0 */
|
|
phy_write(phy, 0x16, 0x0000);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int et1011c_init(struct mii_phy *phy)
|
|
{
|
|
u16 reg_short;
|
|
|
|
reg_short = (u16)(phy_read(phy, 0x16));
|
|
reg_short &= ~(0x7);
|
|
reg_short |= 0x6; /* RGMII Trace Delay*/
|
|
phy_write(phy, 0x16, reg_short);
|
|
|
|
reg_short = (u16)(phy_read(phy, 0x17));
|
|
reg_short &= ~(0x40);
|
|
phy_write(phy, 0x17, reg_short);
|
|
|
|
phy_write(phy, 0x1c, 0x74f0);
|
|
return 0;
|
|
}
|
|
|
|
static const struct mii_phy_ops et1011c_phy_ops = {
|
|
.init = et1011c_init,
|
|
.setup_aneg = genmii_setup_aneg,
|
|
.setup_forced = genmii_setup_forced,
|
|
.poll_link = genmii_poll_link,
|
|
.read_link = genmii_read_link
|
|
};
|
|
|
|
static struct mii_phy_def et1011c_phy_def = {
|
|
.phy_id = 0x0282f000,
|
|
.phy_id_mask = 0x0fffff00,
|
|
.name = "ET1011C Gigabit Ethernet",
|
|
.ops = &et1011c_phy_ops
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
static const struct mii_phy_ops m88e1111_phy_ops = {
|
|
.init = m88e1111_init,
|
|
.setup_aneg = genmii_setup_aneg,
|
|
.setup_forced = genmii_setup_forced,
|
|
.poll_link = genmii_poll_link,
|
|
.read_link = genmii_read_link
|
|
};
|
|
|
|
static struct mii_phy_def m88e1111_phy_def = {
|
|
|
|
.phy_id = 0x01410CC0,
|
|
.phy_id_mask = 0x0ffffff0,
|
|
.name = "Marvell 88E1111 Ethernet",
|
|
.ops = &m88e1111_phy_ops,
|
|
};
|
|
|
|
static const struct mii_phy_ops m88e1112_phy_ops = {
|
|
.init = m88e1112_init,
|
|
.setup_aneg = genmii_setup_aneg,
|
|
.setup_forced = genmii_setup_forced,
|
|
.poll_link = genmii_poll_link,
|
|
.read_link = genmii_read_link
|
|
};
|
|
|
|
static struct mii_phy_def m88e1112_phy_def = {
|
|
.phy_id = 0x01410C90,
|
|
.phy_id_mask = 0x0ffffff0,
|
|
.name = "Marvell 88E1112 Ethernet",
|
|
.ops = &m88e1112_phy_ops,
|
|
};
|
|
|
|
static int ar8035_init(struct mii_phy *phy)
|
|
{
|
|
phy_write(phy, 0x1d, 0x5); /* Address debug register 5 */
|
|
phy_write(phy, 0x1e, 0x2d47); /* Value copied from u-boot */
|
|
phy_write(phy, 0x1d, 0xb); /* Address hib ctrl */
|
|
phy_write(phy, 0x1e, 0xbc20); /* Value copied from u-boot */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct mii_phy_ops ar8035_phy_ops = {
|
|
.init = ar8035_init,
|
|
.setup_aneg = genmii_setup_aneg,
|
|
.setup_forced = genmii_setup_forced,
|
|
.poll_link = genmii_poll_link,
|
|
.read_link = genmii_read_link,
|
|
};
|
|
|
|
static struct mii_phy_def ar8035_phy_def = {
|
|
.phy_id = 0x004dd070,
|
|
.phy_id_mask = 0xfffffff0,
|
|
.name = "Atheros 8035 Gigabit Ethernet",
|
|
.ops = &ar8035_phy_ops,
|
|
};
|
|
|
|
static struct mii_phy_def *mii_phy_table[] = {
|
|
&et1011c_phy_def,
|
|
&cis8201_phy_def,
|
|
&bcm5248_phy_def,
|
|
&m88e1111_phy_def,
|
|
&m88e1112_phy_def,
|
|
&ar8035_phy_def,
|
|
&genmii_phy_def,
|
|
NULL
|
|
};
|
|
|
|
int emac_mii_phy_probe(struct mii_phy *phy, int address)
|
|
{
|
|
struct mii_phy_def *def;
|
|
int i;
|
|
u32 id;
|
|
|
|
phy->autoneg = AUTONEG_DISABLE;
|
|
phy->advertising = 0;
|
|
phy->address = address;
|
|
phy->speed = SPEED_10;
|
|
phy->duplex = DUPLEX_HALF;
|
|
phy->pause = phy->asym_pause = 0;
|
|
|
|
/* Take PHY out of isolate mode and reset it. */
|
|
if (emac_mii_reset_phy(phy))
|
|
return -ENODEV;
|
|
|
|
/* Read ID and find matching entry */
|
|
id = (phy_read(phy, MII_PHYSID1) << 16) | phy_read(phy, MII_PHYSID2);
|
|
for (i = 0; (def = mii_phy_table[i]) != NULL; i++)
|
|
if ((id & def->phy_id_mask) == def->phy_id)
|
|
break;
|
|
/* Should never be NULL (we have a generic entry), but... */
|
|
if (!def)
|
|
return -ENODEV;
|
|
|
|
phy->def = def;
|
|
|
|
/* Determine PHY features if needed */
|
|
phy->features = def->features;
|
|
if (!phy->features) {
|
|
u16 bmsr = phy_read(phy, MII_BMSR);
|
|
if (bmsr & BMSR_ANEGCAPABLE)
|
|
phy->features |= SUPPORTED_Autoneg;
|
|
if (bmsr & BMSR_10HALF)
|
|
phy->features |= SUPPORTED_10baseT_Half;
|
|
if (bmsr & BMSR_10FULL)
|
|
phy->features |= SUPPORTED_10baseT_Full;
|
|
if (bmsr & BMSR_100HALF)
|
|
phy->features |= SUPPORTED_100baseT_Half;
|
|
if (bmsr & BMSR_100FULL)
|
|
phy->features |= SUPPORTED_100baseT_Full;
|
|
if (bmsr & BMSR_ESTATEN) {
|
|
u16 esr = phy_read(phy, MII_ESTATUS);
|
|
if (esr & ESTATUS_1000_TFULL)
|
|
phy->features |= SUPPORTED_1000baseT_Full;
|
|
if (esr & ESTATUS_1000_THALF)
|
|
phy->features |= SUPPORTED_1000baseT_Half;
|
|
}
|
|
phy->features |= SUPPORTED_MII;
|
|
}
|
|
|
|
/* Setup default advertising */
|
|
phy->advertising = phy->features;
|
|
|
|
return 0;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|