mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
1953feb022
Block comments should not use a trailing */ on a separate line and every line of a block comment should start with an '*'. Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com> Signed-off-by: Weihang Li <liweihang@huawei.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
358 lines
7.4 KiB
C
358 lines
7.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* drivers/net/phy/lxt.c
|
|
*
|
|
* Driver for Intel LXT PHYs
|
|
*
|
|
* Author: Andy Fleming
|
|
*
|
|
* Copyright (c) 2004 Freescale Semiconductor, Inc.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mii.h>
|
|
#include <linux/ethtool.h>
|
|
#include <linux/phy.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
/* The Level one LXT970 is used by many boards */
|
|
|
|
#define MII_LXT970_IER 17 /* Interrupt Enable Register */
|
|
|
|
#define MII_LXT970_IER_IEN 0x0002
|
|
|
|
#define MII_LXT970_ISR 18 /* Interrupt Status Register */
|
|
|
|
#define MII_LXT970_IRS_MINT BIT(15)
|
|
|
|
#define MII_LXT970_CONFIG 19 /* Configuration Register */
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
/* The Level one LXT971 is used on some of my custom boards */
|
|
|
|
/* register definitions for the 971 */
|
|
#define MII_LXT971_IER 18 /* Interrupt Enable Register */
|
|
#define MII_LXT971_IER_IEN 0x00f2
|
|
|
|
#define MII_LXT971_ISR 19 /* Interrupt Status Register */
|
|
#define MII_LXT971_ISR_MASK 0x00f0
|
|
|
|
/* register definitions for the 973 */
|
|
#define MII_LXT973_PCR 16 /* Port Configuration Register */
|
|
#define PCR_FIBER_SELECT 1
|
|
|
|
MODULE_DESCRIPTION("Intel LXT PHY driver");
|
|
MODULE_AUTHOR("Andy Fleming");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int lxt970_ack_interrupt(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
|
|
err = phy_read(phydev, MII_BMSR);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = phy_read(phydev, MII_LXT970_ISR);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lxt970_config_intr(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
|
|
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
|
|
err = lxt970_ack_interrupt(phydev);
|
|
if (err)
|
|
return err;
|
|
|
|
err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
|
|
} else {
|
|
err = phy_write(phydev, MII_LXT970_IER, 0);
|
|
if (err)
|
|
return err;
|
|
|
|
err = lxt970_ack_interrupt(phydev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static irqreturn_t lxt970_handle_interrupt(struct phy_device *phydev)
|
|
{
|
|
int irq_status;
|
|
|
|
/* The interrupt status register is cleared by reading BMSR
|
|
* followed by MII_LXT970_ISR
|
|
*/
|
|
irq_status = phy_read(phydev, MII_BMSR);
|
|
if (irq_status < 0) {
|
|
phy_error(phydev);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
irq_status = phy_read(phydev, MII_LXT970_ISR);
|
|
if (irq_status < 0) {
|
|
phy_error(phydev);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
if (!(irq_status & MII_LXT970_IRS_MINT))
|
|
return IRQ_NONE;
|
|
|
|
phy_trigger_machine(phydev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int lxt970_config_init(struct phy_device *phydev)
|
|
{
|
|
return phy_write(phydev, MII_LXT970_CONFIG, 0);
|
|
}
|
|
|
|
|
|
static int lxt971_ack_interrupt(struct phy_device *phydev)
|
|
{
|
|
int err = phy_read(phydev, MII_LXT971_ISR);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lxt971_config_intr(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
|
|
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
|
|
err = lxt971_ack_interrupt(phydev);
|
|
if (err)
|
|
return err;
|
|
|
|
err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
|
|
} else {
|
|
err = phy_write(phydev, MII_LXT971_IER, 0);
|
|
if (err)
|
|
return err;
|
|
|
|
err = lxt971_ack_interrupt(phydev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static irqreturn_t lxt971_handle_interrupt(struct phy_device *phydev)
|
|
{
|
|
int irq_status;
|
|
|
|
irq_status = phy_read(phydev, MII_LXT971_ISR);
|
|
if (irq_status < 0) {
|
|
phy_error(phydev);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
if (!(irq_status & MII_LXT971_ISR_MASK))
|
|
return IRQ_NONE;
|
|
|
|
phy_trigger_machine(phydev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* A2 version of LXT973 chip has an ERRATA: it randomly return the contents
|
|
* of the previous even register when you read a odd register regularly
|
|
*/
|
|
|
|
static int lxt973a2_update_link(struct phy_device *phydev)
|
|
{
|
|
int status;
|
|
int control;
|
|
int retry = 8; /* we try 8 times */
|
|
|
|
/* Do a fake read */
|
|
status = phy_read(phydev, MII_BMSR);
|
|
|
|
if (status < 0)
|
|
return status;
|
|
|
|
control = phy_read(phydev, MII_BMCR);
|
|
if (control < 0)
|
|
return control;
|
|
|
|
do {
|
|
/* Read link and autonegotiation status */
|
|
status = phy_read(phydev, MII_BMSR);
|
|
} while (status >= 0 && retry-- && status == control);
|
|
|
|
if (status < 0)
|
|
return status;
|
|
|
|
if ((status & BMSR_LSTATUS) == 0)
|
|
phydev->link = 0;
|
|
else
|
|
phydev->link = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lxt973a2_read_status(struct phy_device *phydev)
|
|
{
|
|
int adv;
|
|
int err;
|
|
int lpa;
|
|
|
|
/* Update the link, but return if there was an error */
|
|
err = lxt973a2_update_link(phydev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (AUTONEG_ENABLE == phydev->autoneg) {
|
|
int retry = 1;
|
|
|
|
adv = phy_read(phydev, MII_ADVERTISE);
|
|
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
do {
|
|
lpa = phy_read(phydev, MII_LPA);
|
|
|
|
if (lpa < 0)
|
|
return lpa;
|
|
|
|
/* If both registers are equal, it is suspect but not
|
|
* impossible, hence a new try
|
|
*/
|
|
} while (lpa == adv && retry--);
|
|
|
|
mii_lpa_to_linkmode_lpa_t(phydev->lp_advertising, lpa);
|
|
|
|
lpa &= adv;
|
|
|
|
phydev->speed = SPEED_10;
|
|
phydev->duplex = DUPLEX_HALF;
|
|
phydev->pause = phydev->asym_pause = 0;
|
|
|
|
if (lpa & (LPA_100FULL | LPA_100HALF)) {
|
|
phydev->speed = SPEED_100;
|
|
|
|
if (lpa & LPA_100FULL)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
} else {
|
|
if (lpa & LPA_10FULL)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
}
|
|
|
|
phy_resolve_aneg_pause(phydev);
|
|
} else {
|
|
err = genphy_read_status_fixed(phydev);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
phydev->pause = phydev->asym_pause = 0;
|
|
linkmode_zero(phydev->lp_advertising);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lxt973_probe(struct phy_device *phydev)
|
|
{
|
|
int val = phy_read(phydev, MII_LXT973_PCR);
|
|
|
|
if (val & PCR_FIBER_SELECT) {
|
|
/*
|
|
* If fiber is selected, then the only correct setting
|
|
* is 100Mbps, full duplex, and auto negotiation off.
|
|
*/
|
|
val = phy_read(phydev, MII_BMCR);
|
|
val |= (BMCR_SPEED100 | BMCR_FULLDPLX);
|
|
val &= ~BMCR_ANENABLE;
|
|
phy_write(phydev, MII_BMCR, val);
|
|
/* Remember that the port is in fiber mode. */
|
|
phydev->priv = lxt973_probe;
|
|
phydev->port = PORT_FIBRE;
|
|
} else {
|
|
phydev->priv = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int lxt973_config_aneg(struct phy_device *phydev)
|
|
{
|
|
/* Do nothing if port is in fiber mode. */
|
|
return phydev->priv ? 0 : genphy_config_aneg(phydev);
|
|
}
|
|
|
|
static struct phy_driver lxt97x_driver[] = {
|
|
{
|
|
.phy_id = 0x78100000,
|
|
.name = "LXT970",
|
|
.phy_id_mask = 0xfffffff0,
|
|
/* PHY_BASIC_FEATURES */
|
|
.config_init = lxt970_config_init,
|
|
.config_intr = lxt970_config_intr,
|
|
.handle_interrupt = lxt970_handle_interrupt,
|
|
}, {
|
|
.phy_id = 0x001378e0,
|
|
.name = "LXT971",
|
|
.phy_id_mask = 0xfffffff0,
|
|
/* PHY_BASIC_FEATURES */
|
|
.config_intr = lxt971_config_intr,
|
|
.handle_interrupt = lxt971_handle_interrupt,
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
}, {
|
|
.phy_id = 0x00137a10,
|
|
.name = "LXT973-A2",
|
|
.phy_id_mask = 0xffffffff,
|
|
/* PHY_BASIC_FEATURES */
|
|
.flags = 0,
|
|
.probe = lxt973_probe,
|
|
.config_aneg = lxt973_config_aneg,
|
|
.read_status = lxt973a2_read_status,
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
}, {
|
|
.phy_id = 0x00137a10,
|
|
.name = "LXT973",
|
|
.phy_id_mask = 0xfffffff0,
|
|
/* PHY_BASIC_FEATURES */
|
|
.flags = 0,
|
|
.probe = lxt973_probe,
|
|
.config_aneg = lxt973_config_aneg,
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
} };
|
|
|
|
module_phy_driver(lxt97x_driver);
|
|
|
|
static struct mdio_device_id __maybe_unused lxt_tbl[] = {
|
|
{ 0x78100000, 0xfffffff0 },
|
|
{ 0x001378e0, 0xfffffff0 },
|
|
{ 0x00137a10, 0xfffffff0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(mdio, lxt_tbl);
|