500 строки
11 KiB
C
500 строки
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* drivers/net/phy/smsc.c
|
|
*
|
|
* Driver for SMSC PHYs
|
|
*
|
|
* Author: Herbert Valerio Riedel
|
|
*
|
|
* Copyright (c) 2006 Herbert Valerio Riedel <hvr@gnu.org>
|
|
*
|
|
* Support added for SMSC LAN8187 and LAN8700 by steve.glendinning@shawell.net
|
|
*
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mii.h>
|
|
#include <linux/ethtool.h>
|
|
#include <linux/of.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/smscphy.h>
|
|
|
|
/* Vendor-specific PHY Definitions */
|
|
/* EDPD NLP / crossover time configuration */
|
|
#define PHY_EDPD_CONFIG 16
|
|
#define PHY_EDPD_CONFIG_EXT_CROSSOVER_ 0x0001
|
|
|
|
/* Control/Status Indication Register */
|
|
#define SPECIAL_CTRL_STS 27
|
|
#define SPECIAL_CTRL_STS_OVRRD_AMDIX_ 0x8000
|
|
#define SPECIAL_CTRL_STS_AMDIX_ENABLE_ 0x4000
|
|
#define SPECIAL_CTRL_STS_AMDIX_STATE_ 0x2000
|
|
|
|
struct smsc_hw_stat {
|
|
const char *string;
|
|
u8 reg;
|
|
u8 bits;
|
|
};
|
|
|
|
static struct smsc_hw_stat smsc_hw_stats[] = {
|
|
{ "phy_symbol_errors", 26, 16},
|
|
};
|
|
|
|
struct smsc_phy_priv {
|
|
bool energy_enable;
|
|
struct clk *refclk;
|
|
};
|
|
|
|
static int smsc_phy_ack_interrupt(struct phy_device *phydev)
|
|
{
|
|
int rc = phy_read(phydev, MII_LAN83C185_ISF);
|
|
|
|
return rc < 0 ? rc : 0;
|
|
}
|
|
|
|
static int smsc_phy_config_intr(struct phy_device *phydev)
|
|
{
|
|
int rc;
|
|
|
|
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
|
|
rc = smsc_phy_ack_interrupt(phydev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = phy_write(phydev, MII_LAN83C185_IM,
|
|
MII_LAN83C185_ISF_INT_PHYLIB_EVENTS);
|
|
} else {
|
|
rc = phy_write(phydev, MII_LAN83C185_IM, 0);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = smsc_phy_ack_interrupt(phydev);
|
|
}
|
|
|
|
return rc < 0 ? rc : 0;
|
|
}
|
|
|
|
static irqreturn_t smsc_phy_handle_interrupt(struct phy_device *phydev)
|
|
{
|
|
int irq_status;
|
|
|
|
irq_status = phy_read(phydev, MII_LAN83C185_ISF);
|
|
if (irq_status < 0) {
|
|
phy_error(phydev);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
if (!(irq_status & MII_LAN83C185_ISF_INT_PHYLIB_EVENTS))
|
|
return IRQ_NONE;
|
|
|
|
phy_trigger_machine(phydev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int smsc_phy_config_init(struct phy_device *phydev)
|
|
{
|
|
struct smsc_phy_priv *priv = phydev->priv;
|
|
int rc;
|
|
|
|
if (!priv->energy_enable || phydev->irq != PHY_POLL)
|
|
return 0;
|
|
|
|
rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
|
|
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* Enable energy detect mode for this SMSC Transceivers */
|
|
rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
|
|
rc | MII_LAN83C185_EDPWRDOWN);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
return smsc_phy_ack_interrupt(phydev);
|
|
}
|
|
|
|
static int smsc_phy_reset(struct phy_device *phydev)
|
|
{
|
|
int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* If the SMSC PHY is in power down mode, then set it
|
|
* in all capable mode before using it.
|
|
*/
|
|
if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) {
|
|
/* set "all capable" mode */
|
|
rc |= MII_LAN83C185_MODE_ALL;
|
|
phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);
|
|
}
|
|
|
|
/* reset the phy */
|
|
return genphy_soft_reset(phydev);
|
|
}
|
|
|
|
static int lan911x_config_init(struct phy_device *phydev)
|
|
{
|
|
return smsc_phy_ack_interrupt(phydev);
|
|
}
|
|
|
|
static int lan87xx_config_aneg(struct phy_device *phydev)
|
|
{
|
|
int rc;
|
|
int val;
|
|
|
|
switch (phydev->mdix_ctrl) {
|
|
case ETH_TP_MDI:
|
|
val = SPECIAL_CTRL_STS_OVRRD_AMDIX_;
|
|
break;
|
|
case ETH_TP_MDI_X:
|
|
val = SPECIAL_CTRL_STS_OVRRD_AMDIX_ |
|
|
SPECIAL_CTRL_STS_AMDIX_STATE_;
|
|
break;
|
|
case ETH_TP_MDI_AUTO:
|
|
val = SPECIAL_CTRL_STS_AMDIX_ENABLE_;
|
|
break;
|
|
default:
|
|
return genphy_config_aneg(phydev);
|
|
}
|
|
|
|
rc = phy_read(phydev, SPECIAL_CTRL_STS);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc &= ~(SPECIAL_CTRL_STS_OVRRD_AMDIX_ |
|
|
SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
|
|
SPECIAL_CTRL_STS_AMDIX_STATE_);
|
|
rc |= val;
|
|
phy_write(phydev, SPECIAL_CTRL_STS, rc);
|
|
|
|
phydev->mdix = phydev->mdix_ctrl;
|
|
return genphy_config_aneg(phydev);
|
|
}
|
|
|
|
static int lan95xx_config_aneg_ext(struct phy_device *phydev)
|
|
{
|
|
int rc;
|
|
|
|
if (phydev->phy_id != 0x0007c0f0) /* not (LAN9500A or LAN9505A) */
|
|
return lan87xx_config_aneg(phydev);
|
|
|
|
/* Extend Manual AutoMDIX timer */
|
|
rc = phy_read(phydev, PHY_EDPD_CONFIG);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
|
|
phy_write(phydev, PHY_EDPD_CONFIG, rc);
|
|
return lan87xx_config_aneg(phydev);
|
|
}
|
|
|
|
/*
|
|
* The LAN87xx suffers from rare absence of the ENERGYON-bit when Ethernet cable
|
|
* plugs in while LAN87xx is in Energy Detect Power-Down mode. This leads to
|
|
* unstable detection of plugging in Ethernet cable.
|
|
* This workaround disables Energy Detect Power-Down mode and waiting for
|
|
* response on link pulses to detect presence of plugged Ethernet cable.
|
|
* The Energy Detect Power-Down mode is enabled again in the end of procedure to
|
|
* save approximately 220 mW of power if cable is unplugged.
|
|
* The workaround is only applicable to poll mode. Energy Detect Power-Down may
|
|
* not be used in interrupt mode lest link change detection becomes unreliable.
|
|
*/
|
|
static int lan87xx_read_status(struct phy_device *phydev)
|
|
{
|
|
struct smsc_phy_priv *priv = phydev->priv;
|
|
int err;
|
|
|
|
err = genphy_read_status(phydev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!phydev->link && priv->energy_enable && phydev->irq == PHY_POLL) {
|
|
/* Disable EDPD to wake up PHY */
|
|
int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
|
|
rc & ~MII_LAN83C185_EDPWRDOWN);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* Wait max 640 ms to detect energy and the timeout is not
|
|
* an actual error.
|
|
*/
|
|
read_poll_timeout(phy_read, rc,
|
|
rc & MII_LAN83C185_ENERGYON || rc < 0,
|
|
10000, 640000, true, phydev,
|
|
MII_LAN83C185_CTRL_STATUS);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* Re-enable EDPD */
|
|
rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
|
|
rc | MII_LAN83C185_EDPWRDOWN);
|
|
if (rc < 0)
|
|
return rc;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int smsc_get_sset_count(struct phy_device *phydev)
|
|
{
|
|
return ARRAY_SIZE(smsc_hw_stats);
|
|
}
|
|
|
|
static void smsc_get_strings(struct phy_device *phydev, u8 *data)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(smsc_hw_stats); i++) {
|
|
strncpy(data + i * ETH_GSTRING_LEN,
|
|
smsc_hw_stats[i].string, ETH_GSTRING_LEN);
|
|
}
|
|
}
|
|
|
|
static u64 smsc_get_stat(struct phy_device *phydev, int i)
|
|
{
|
|
struct smsc_hw_stat stat = smsc_hw_stats[i];
|
|
int val;
|
|
u64 ret;
|
|
|
|
val = phy_read(phydev, stat.reg);
|
|
if (val < 0)
|
|
ret = U64_MAX;
|
|
else
|
|
ret = val;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void smsc_get_stats(struct phy_device *phydev,
|
|
struct ethtool_stats *stats, u64 *data)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(smsc_hw_stats); i++)
|
|
data[i] = smsc_get_stat(phydev, i);
|
|
}
|
|
|
|
static void smsc_phy_remove(struct phy_device *phydev)
|
|
{
|
|
struct smsc_phy_priv *priv = phydev->priv;
|
|
|
|
clk_disable_unprepare(priv->refclk);
|
|
clk_put(priv->refclk);
|
|
}
|
|
|
|
static int smsc_phy_probe(struct phy_device *phydev)
|
|
{
|
|
struct device *dev = &phydev->mdio.dev;
|
|
struct device_node *of_node = dev->of_node;
|
|
struct smsc_phy_priv *priv;
|
|
int ret;
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->energy_enable = true;
|
|
|
|
if (of_property_read_bool(of_node, "smsc,disable-energy-detect"))
|
|
priv->energy_enable = false;
|
|
|
|
phydev->priv = priv;
|
|
|
|
/* Make clk optional to keep DTB backward compatibility. */
|
|
priv->refclk = clk_get_optional(dev, NULL);
|
|
if (IS_ERR(priv->refclk))
|
|
return dev_err_probe(dev, PTR_ERR(priv->refclk),
|
|
"Failed to request clock\n");
|
|
|
|
ret = clk_prepare_enable(priv->refclk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = clk_set_rate(priv->refclk, 50 * 1000 * 1000);
|
|
if (ret) {
|
|
clk_disable_unprepare(priv->refclk);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct phy_driver smsc_phy_driver[] = {
|
|
{
|
|
.phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
|
|
.phy_id_mask = 0xfffffff0,
|
|
.name = "SMSC LAN83C185",
|
|
|
|
/* PHY_BASIC_FEATURES */
|
|
|
|
.probe = smsc_phy_probe,
|
|
|
|
/* basic functions */
|
|
.config_init = smsc_phy_config_init,
|
|
.soft_reset = smsc_phy_reset,
|
|
|
|
/* IRQ related */
|
|
.config_intr = smsc_phy_config_intr,
|
|
.handle_interrupt = smsc_phy_handle_interrupt,
|
|
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
}, {
|
|
.phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
|
|
.phy_id_mask = 0xfffffff0,
|
|
.name = "SMSC LAN8187",
|
|
|
|
/* PHY_BASIC_FEATURES */
|
|
|
|
.probe = smsc_phy_probe,
|
|
|
|
/* basic functions */
|
|
.config_init = smsc_phy_config_init,
|
|
.soft_reset = smsc_phy_reset,
|
|
|
|
/* IRQ related */
|
|
.config_intr = smsc_phy_config_intr,
|
|
.handle_interrupt = smsc_phy_handle_interrupt,
|
|
|
|
/* Statistics */
|
|
.get_sset_count = smsc_get_sset_count,
|
|
.get_strings = smsc_get_strings,
|
|
.get_stats = smsc_get_stats,
|
|
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
}, {
|
|
/* This covers internal PHY (phy_id: 0x0007C0C3) for
|
|
* LAN9500 (PID: 0x9500), LAN9514 (PID: 0xec00), LAN9505 (PID: 0x9505)
|
|
*/
|
|
.phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
|
|
.phy_id_mask = 0xfffffff0,
|
|
.name = "SMSC LAN8700",
|
|
|
|
/* PHY_BASIC_FEATURES */
|
|
|
|
.probe = smsc_phy_probe,
|
|
|
|
/* basic functions */
|
|
.read_status = lan87xx_read_status,
|
|
.config_init = smsc_phy_config_init,
|
|
.soft_reset = smsc_phy_reset,
|
|
.config_aneg = lan87xx_config_aneg,
|
|
|
|
/* IRQ related */
|
|
.config_intr = smsc_phy_config_intr,
|
|
.handle_interrupt = smsc_phy_handle_interrupt,
|
|
|
|
/* Statistics */
|
|
.get_sset_count = smsc_get_sset_count,
|
|
.get_strings = smsc_get_strings,
|
|
.get_stats = smsc_get_stats,
|
|
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
}, {
|
|
.phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
|
|
.phy_id_mask = 0xfffffff0,
|
|
.name = "SMSC LAN911x Internal PHY",
|
|
|
|
/* PHY_BASIC_FEATURES */
|
|
|
|
.probe = smsc_phy_probe,
|
|
|
|
/* basic functions */
|
|
.config_init = lan911x_config_init,
|
|
|
|
/* IRQ related */
|
|
.config_intr = smsc_phy_config_intr,
|
|
.handle_interrupt = smsc_phy_handle_interrupt,
|
|
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
}, {
|
|
/* This covers internal PHY (phy_id: 0x0007C0F0) for
|
|
* LAN9500A (PID: 0x9E00), LAN9505A (PID: 0x9E01)
|
|
*/
|
|
.phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
|
|
.phy_id_mask = 0xfffffff0,
|
|
.name = "SMSC LAN8710/LAN8720",
|
|
|
|
/* PHY_BASIC_FEATURES */
|
|
|
|
.probe = smsc_phy_probe,
|
|
.remove = smsc_phy_remove,
|
|
|
|
/* basic functions */
|
|
.read_status = lan87xx_read_status,
|
|
.config_init = smsc_phy_config_init,
|
|
.soft_reset = smsc_phy_reset,
|
|
.config_aneg = lan95xx_config_aneg_ext,
|
|
|
|
/* IRQ related */
|
|
.config_intr = smsc_phy_config_intr,
|
|
.handle_interrupt = smsc_phy_handle_interrupt,
|
|
|
|
/* Statistics */
|
|
.get_sset_count = smsc_get_sset_count,
|
|
.get_strings = smsc_get_strings,
|
|
.get_stats = smsc_get_stats,
|
|
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
}, {
|
|
.phy_id = 0x0007c110,
|
|
.phy_id_mask = 0xfffffff0,
|
|
.name = "SMSC LAN8740",
|
|
|
|
/* PHY_BASIC_FEATURES */
|
|
.flags = PHY_RST_AFTER_CLK_EN,
|
|
|
|
.probe = smsc_phy_probe,
|
|
|
|
/* basic functions */
|
|
.read_status = lan87xx_read_status,
|
|
.config_init = smsc_phy_config_init,
|
|
.soft_reset = smsc_phy_reset,
|
|
|
|
/* IRQ related */
|
|
.config_intr = smsc_phy_config_intr,
|
|
.handle_interrupt = smsc_phy_handle_interrupt,
|
|
|
|
/* Statistics */
|
|
.get_sset_count = smsc_get_sset_count,
|
|
.get_strings = smsc_get_strings,
|
|
.get_stats = smsc_get_stats,
|
|
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
} };
|
|
|
|
module_phy_driver(smsc_phy_driver);
|
|
|
|
MODULE_DESCRIPTION("SMSC PHY driver");
|
|
MODULE_AUTHOR("Herbert Valerio Riedel");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static struct mdio_device_id __maybe_unused smsc_tbl[] = {
|
|
{ 0x0007c0a0, 0xfffffff0 },
|
|
{ 0x0007c0b0, 0xfffffff0 },
|
|
{ 0x0007c0c0, 0xfffffff0 },
|
|
{ 0x0007c0d0, 0xfffffff0 },
|
|
{ 0x0007c0f0, 0xfffffff0 },
|
|
{ 0x0007c110, 0xfffffff0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(mdio, smsc_tbl);
|