Contributors: 18
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Andy Fleming |
440 |
36.42% |
1 |
4.17% |
| Christophe Leroy |
333 |
27.57% |
2 |
8.33% |
| Ioana Ciornei |
195 |
16.14% |
2 |
8.33% |
| Richard Cochran |
145 |
12.00% |
1 |
4.17% |
| David Woodhouse |
35 |
2.90% |
2 |
8.33% |
| Russell King |
11 |
0.91% |
2 |
8.33% |
| Thomas Bogendoerfer |
10 |
0.83% |
1 |
4.17% |
| Andrew Lunn |
8 |
0.66% |
2 |
8.33% |
| Christian Hohnstaedt |
7 |
0.58% |
1 |
4.17% |
| Michael Walle |
6 |
0.50% |
1 |
4.17% |
| Uwe Zeisberger |
5 |
0.41% |
1 |
4.17% |
| Heiner Kallweit |
4 |
0.33% |
1 |
4.17% |
| Sergei Shtylyov |
3 |
0.25% |
2 |
8.33% |
| Johan Hovold |
2 |
0.17% |
1 |
4.17% |
| Uwe Kleine-König |
1 |
0.08% |
1 |
4.17% |
| Linus Torvalds |
1 |
0.08% |
1 |
4.17% |
| Stephen Hemminger |
1 |
0.08% |
1 |
4.17% |
| Wenpeng Liang |
1 |
0.08% |
1 |
4.17% |
| Total |
1208 |
|
24 |
|
// 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);