![Sergei Shtylylov](/assets/img/avatar_default.png)
Prevent phylib from freeing PHY IRQ twice on closing an eth device: phy_disconnect() first calls phy_stop_interrupts(), then it calls phy_stop_machine() which in turn calls phy_stop_interrupts() making the kernel complain on each bootup... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
858 lines
19 KiB
C
858 lines
19 KiB
C
/*
|
|
* drivers/net/phy/phy.c
|
|
*
|
|
* Framework for configuring and reading PHY devices
|
|
* Based on code in sungem_phy.c and gianfar_phy.c
|
|
*
|
|
* Author: Andy Fleming
|
|
*
|
|
* Copyright (c) 2004 Freescale Semiconductor, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/string.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/slab.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 <asm/uaccess.h>
|
|
|
|
/* Convenience function to print out the current phy status
|
|
*/
|
|
void phy_print_status(struct phy_device *phydev)
|
|
{
|
|
pr_info("PHY: %s - Link is %s", phydev->dev.bus_id,
|
|
phydev->link ? "Up" : "Down");
|
|
if (phydev->link)
|
|
printk(" - %d/%s", phydev->speed,
|
|
DUPLEX_FULL == phydev->duplex ?
|
|
"Full" : "Half");
|
|
|
|
printk("\n");
|
|
}
|
|
EXPORT_SYMBOL(phy_print_status);
|
|
|
|
|
|
/* Convenience functions for reading/writing a given PHY
|
|
* register. They MUST NOT be called from interrupt context,
|
|
* because the bus read/write functions may wait for an interrupt
|
|
* to conclude the operation. */
|
|
int phy_read(struct phy_device *phydev, u16 regnum)
|
|
{
|
|
int retval;
|
|
struct mii_bus *bus = phydev->bus;
|
|
|
|
spin_lock_bh(&bus->mdio_lock);
|
|
retval = bus->read(bus, phydev->addr, regnum);
|
|
spin_unlock_bh(&bus->mdio_lock);
|
|
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL(phy_read);
|
|
|
|
int phy_write(struct phy_device *phydev, u16 regnum, u16 val)
|
|
{
|
|
int err;
|
|
struct mii_bus *bus = phydev->bus;
|
|
|
|
spin_lock_bh(&bus->mdio_lock);
|
|
err = bus->write(bus, phydev->addr, regnum, val);
|
|
spin_unlock_bh(&bus->mdio_lock);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(phy_write);
|
|
|
|
|
|
int phy_clear_interrupt(struct phy_device *phydev)
|
|
{
|
|
int err = 0;
|
|
|
|
if (phydev->drv->ack_interrupt)
|
|
err = phydev->drv->ack_interrupt(phydev);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
|
|
{
|
|
int err = 0;
|
|
|
|
phydev->interrupts = interrupts;
|
|
if (phydev->drv->config_intr)
|
|
err = phydev->drv->config_intr(phydev);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/* phy_aneg_done
|
|
*
|
|
* description: Reads the status register and returns 0 either if
|
|
* auto-negotiation is incomplete, or if there was an error.
|
|
* Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
|
|
*/
|
|
static inline int phy_aneg_done(struct phy_device *phydev)
|
|
{
|
|
int retval;
|
|
|
|
retval = phy_read(phydev, MII_BMSR);
|
|
|
|
return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
|
|
}
|
|
|
|
/* A structure for mapping a particular speed and duplex
|
|
* combination to a particular SUPPORTED and ADVERTISED value */
|
|
struct phy_setting {
|
|
int speed;
|
|
int duplex;
|
|
u32 setting;
|
|
};
|
|
|
|
/* A mapping of all SUPPORTED settings to speed/duplex */
|
|
static const struct phy_setting settings[] = {
|
|
{
|
|
.speed = 10000,
|
|
.duplex = DUPLEX_FULL,
|
|
.setting = SUPPORTED_10000baseT_Full,
|
|
},
|
|
{
|
|
.speed = SPEED_1000,
|
|
.duplex = DUPLEX_FULL,
|
|
.setting = SUPPORTED_1000baseT_Full,
|
|
},
|
|
{
|
|
.speed = SPEED_1000,
|
|
.duplex = DUPLEX_HALF,
|
|
.setting = SUPPORTED_1000baseT_Half,
|
|
},
|
|
{
|
|
.speed = SPEED_100,
|
|
.duplex = DUPLEX_FULL,
|
|
.setting = SUPPORTED_100baseT_Full,
|
|
},
|
|
{
|
|
.speed = SPEED_100,
|
|
.duplex = DUPLEX_HALF,
|
|
.setting = SUPPORTED_100baseT_Half,
|
|
},
|
|
{
|
|
.speed = SPEED_10,
|
|
.duplex = DUPLEX_FULL,
|
|
.setting = SUPPORTED_10baseT_Full,
|
|
},
|
|
{
|
|
.speed = SPEED_10,
|
|
.duplex = DUPLEX_HALF,
|
|
.setting = SUPPORTED_10baseT_Half,
|
|
},
|
|
};
|
|
|
|
#define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting))
|
|
|
|
/* phy_find_setting
|
|
*
|
|
* description: Searches the settings array for the setting which
|
|
* matches the desired speed and duplex, and returns the index
|
|
* of that setting. Returns the index of the last setting if
|
|
* none of the others match.
|
|
*/
|
|
static inline int phy_find_setting(int speed, int duplex)
|
|
{
|
|
int idx = 0;
|
|
|
|
while (idx < ARRAY_SIZE(settings) &&
|
|
(settings[idx].speed != speed ||
|
|
settings[idx].duplex != duplex))
|
|
idx++;
|
|
|
|
return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
|
|
}
|
|
|
|
/* phy_find_valid
|
|
* idx: The first index in settings[] to search
|
|
* features: A mask of the valid settings
|
|
*
|
|
* description: Returns the index of the first valid setting less
|
|
* than or equal to the one pointed to by idx, as determined by
|
|
* the mask in features. Returns the index of the last setting
|
|
* if nothing else matches.
|
|
*/
|
|
static inline int phy_find_valid(int idx, u32 features)
|
|
{
|
|
while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
|
|
idx++;
|
|
|
|
return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
|
|
}
|
|
|
|
/* phy_sanitize_settings
|
|
*
|
|
* description: Make sure the PHY is set to supported speeds and
|
|
* duplexes. Drop down by one in this order: 1000/FULL,
|
|
* 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF
|
|
*/
|
|
void phy_sanitize_settings(struct phy_device *phydev)
|
|
{
|
|
u32 features = phydev->supported;
|
|
int idx;
|
|
|
|
/* Sanitize settings based on PHY capabilities */
|
|
if ((features & SUPPORTED_Autoneg) == 0)
|
|
phydev->autoneg = 0;
|
|
|
|
idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
|
|
features);
|
|
|
|
phydev->speed = settings[idx].speed;
|
|
phydev->duplex = settings[idx].duplex;
|
|
}
|
|
EXPORT_SYMBOL(phy_sanitize_settings);
|
|
|
|
/* phy_ethtool_sset:
|
|
* A generic ethtool sset function. Handles all the details
|
|
*
|
|
* A few notes about parameter checking:
|
|
* - We don't set port or transceiver, so we don't care what they
|
|
* were set to.
|
|
* - phy_start_aneg() will make sure forced settings are sane, and
|
|
* choose the next best ones from the ones selected, so we don't
|
|
* care if ethtool tries to give us bad values
|
|
*
|
|
*/
|
|
int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
|
|
{
|
|
if (cmd->phy_address != phydev->addr)
|
|
return -EINVAL;
|
|
|
|
/* We make sure that we don't pass unsupported
|
|
* values in to the PHY */
|
|
cmd->advertising &= phydev->supported;
|
|
|
|
/* Verify the settings we care about. */
|
|
if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
|
|
return -EINVAL;
|
|
|
|
if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
|
|
return -EINVAL;
|
|
|
|
if (cmd->autoneg == AUTONEG_DISABLE
|
|
&& ((cmd->speed != SPEED_1000
|
|
&& cmd->speed != SPEED_100
|
|
&& cmd->speed != SPEED_10)
|
|
|| (cmd->duplex != DUPLEX_HALF
|
|
&& cmd->duplex != DUPLEX_FULL)))
|
|
return -EINVAL;
|
|
|
|
phydev->autoneg = cmd->autoneg;
|
|
|
|
phydev->speed = cmd->speed;
|
|
|
|
phydev->advertising = cmd->advertising;
|
|
|
|
if (AUTONEG_ENABLE == cmd->autoneg)
|
|
phydev->advertising |= ADVERTISED_Autoneg;
|
|
else
|
|
phydev->advertising &= ~ADVERTISED_Autoneg;
|
|
|
|
phydev->duplex = cmd->duplex;
|
|
|
|
/* Restart the PHY */
|
|
phy_start_aneg(phydev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
|
|
{
|
|
cmd->supported = phydev->supported;
|
|
|
|
cmd->advertising = phydev->advertising;
|
|
|
|
cmd->speed = phydev->speed;
|
|
cmd->duplex = phydev->duplex;
|
|
cmd->port = PORT_MII;
|
|
cmd->phy_address = phydev->addr;
|
|
cmd->transceiver = XCVR_EXTERNAL;
|
|
cmd->autoneg = phydev->autoneg;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Note that this function is currently incompatible with the
|
|
* PHYCONTROL layer. It changes registers without regard to
|
|
* current state. Use at own risk
|
|
*/
|
|
int phy_mii_ioctl(struct phy_device *phydev,
|
|
struct mii_ioctl_data *mii_data, int cmd)
|
|
{
|
|
u16 val = mii_data->val_in;
|
|
|
|
switch (cmd) {
|
|
case SIOCGMIIPHY:
|
|
mii_data->phy_id = phydev->addr;
|
|
break;
|
|
case SIOCGMIIREG:
|
|
mii_data->val_out = phy_read(phydev, mii_data->reg_num);
|
|
break;
|
|
|
|
case SIOCSMIIREG:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (mii_data->phy_id == phydev->addr) {
|
|
switch(mii_data->reg_num) {
|
|
case MII_BMCR:
|
|
if (val & (BMCR_RESET|BMCR_ANENABLE))
|
|
phydev->autoneg = AUTONEG_DISABLE;
|
|
else
|
|
phydev->autoneg = AUTONEG_ENABLE;
|
|
if ((!phydev->autoneg) && (val & BMCR_FULLDPLX))
|
|
phydev->duplex = DUPLEX_FULL;
|
|
else
|
|
phydev->duplex = DUPLEX_HALF;
|
|
break;
|
|
case MII_ADVERTISE:
|
|
phydev->advertising = val;
|
|
break;
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
}
|
|
|
|
phy_write(phydev, mii_data->reg_num, val);
|
|
|
|
if (mii_data->reg_num == MII_BMCR
|
|
&& val & BMCR_RESET
|
|
&& phydev->drv->config_init)
|
|
phydev->drv->config_init(phydev);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* phy_start_aneg
|
|
*
|
|
* description: Sanitizes the settings (if we're not
|
|
* autonegotiating them), and then calls the driver's
|
|
* config_aneg function. If the PHYCONTROL Layer is operating,
|
|
* we change the state to reflect the beginning of
|
|
* Auto-negotiation or forcing.
|
|
*/
|
|
int phy_start_aneg(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
|
|
spin_lock(&phydev->lock);
|
|
|
|
if (AUTONEG_DISABLE == phydev->autoneg)
|
|
phy_sanitize_settings(phydev);
|
|
|
|
err = phydev->drv->config_aneg(phydev);
|
|
|
|
if (err < 0)
|
|
goto out_unlock;
|
|
|
|
if (phydev->state != PHY_HALTED) {
|
|
if (AUTONEG_ENABLE == phydev->autoneg) {
|
|
phydev->state = PHY_AN;
|
|
phydev->link_timeout = PHY_AN_TIMEOUT;
|
|
} else {
|
|
phydev->state = PHY_FORCING;
|
|
phydev->link_timeout = PHY_FORCE_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
out_unlock:
|
|
spin_unlock(&phydev->lock);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(phy_start_aneg);
|
|
|
|
|
|
static void phy_change(void *data);
|
|
static void phy_timer(unsigned long data);
|
|
|
|
/* phy_start_machine:
|
|
*
|
|
* description: The PHY infrastructure can run a state machine
|
|
* which tracks whether the PHY is starting up, negotiating,
|
|
* etc. This function starts the timer which tracks the state
|
|
* of the PHY. If you want to be notified when the state
|
|
* changes, pass in the callback, otherwise, pass NULL. If you
|
|
* want to maintain your own state machine, do not call this
|
|
* function. */
|
|
void phy_start_machine(struct phy_device *phydev,
|
|
void (*handler)(struct net_device *))
|
|
{
|
|
phydev->adjust_state = handler;
|
|
|
|
init_timer(&phydev->phy_timer);
|
|
phydev->phy_timer.function = &phy_timer;
|
|
phydev->phy_timer.data = (unsigned long) phydev;
|
|
mod_timer(&phydev->phy_timer, jiffies + HZ);
|
|
}
|
|
|
|
/* phy_stop_machine
|
|
*
|
|
* description: Stops the state machine timer, sets the state to UP
|
|
* (unless it wasn't up yet). This function must be called BEFORE
|
|
* phy_detach.
|
|
*/
|
|
void phy_stop_machine(struct phy_device *phydev)
|
|
{
|
|
del_timer_sync(&phydev->phy_timer);
|
|
|
|
spin_lock(&phydev->lock);
|
|
if (phydev->state > PHY_UP)
|
|
phydev->state = PHY_UP;
|
|
spin_unlock(&phydev->lock);
|
|
|
|
phydev->adjust_state = NULL;
|
|
}
|
|
|
|
/* phy_force_reduction
|
|
*
|
|
* description: Reduces the speed/duplex settings by
|
|
* one notch. The order is so:
|
|
* 1000/FULL, 1000/HALF, 100/FULL, 100/HALF,
|
|
* 10/FULL, 10/HALF. The function bottoms out at 10/HALF.
|
|
*/
|
|
static void phy_force_reduction(struct phy_device *phydev)
|
|
{
|
|
int idx;
|
|
|
|
idx = phy_find_setting(phydev->speed, phydev->duplex);
|
|
|
|
idx++;
|
|
|
|
idx = phy_find_valid(idx, phydev->supported);
|
|
|
|
phydev->speed = settings[idx].speed;
|
|
phydev->duplex = settings[idx].duplex;
|
|
|
|
pr_info("Trying %d/%s\n", phydev->speed,
|
|
DUPLEX_FULL == phydev->duplex ?
|
|
"FULL" : "HALF");
|
|
}
|
|
|
|
|
|
/* phy_error:
|
|
*
|
|
* Moves the PHY to the HALTED state in response to a read
|
|
* or write error, and tells the controller the link is down.
|
|
* Must not be called from interrupt context, or while the
|
|
* phydev->lock is held.
|
|
*/
|
|
void phy_error(struct phy_device *phydev)
|
|
{
|
|
spin_lock(&phydev->lock);
|
|
phydev->state = PHY_HALTED;
|
|
spin_unlock(&phydev->lock);
|
|
}
|
|
|
|
/* phy_interrupt
|
|
*
|
|
* description: When a PHY interrupt occurs, the handler disables
|
|
* interrupts, and schedules a work task to clear the interrupt.
|
|
*/
|
|
static irqreturn_t phy_interrupt(int irq, void *phy_dat, struct pt_regs *regs)
|
|
{
|
|
struct phy_device *phydev = phy_dat;
|
|
|
|
/* The MDIO bus is not allowed to be written in interrupt
|
|
* context, so we need to disable the irq here. A work
|
|
* queue will write the PHY to disable and clear the
|
|
* interrupt, and then reenable the irq line. */
|
|
disable_irq_nosync(irq);
|
|
|
|
schedule_work(&phydev->phy_queue);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* Enable the interrupts from the PHY side */
|
|
int phy_enable_interrupts(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
|
|
err = phy_clear_interrupt(phydev);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(phy_enable_interrupts);
|
|
|
|
/* Disable the PHY interrupts from the PHY side */
|
|
int phy_disable_interrupts(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
|
|
/* Disable PHY interrupts */
|
|
err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
|
|
|
|
if (err)
|
|
goto phy_err;
|
|
|
|
/* Clear the interrupt */
|
|
err = phy_clear_interrupt(phydev);
|
|
|
|
if (err)
|
|
goto phy_err;
|
|
|
|
return 0;
|
|
|
|
phy_err:
|
|
phy_error(phydev);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(phy_disable_interrupts);
|
|
|
|
/* phy_start_interrupts
|
|
*
|
|
* description: Request the interrupt for the given PHY. If
|
|
* this fails, then we set irq to PHY_POLL.
|
|
* Otherwise, we enable the interrupts in the PHY.
|
|
* Returns 0 on success.
|
|
* This should only be called with a valid IRQ number.
|
|
*/
|
|
int phy_start_interrupts(struct phy_device *phydev)
|
|
{
|
|
int err = 0;
|
|
|
|
INIT_WORK(&phydev->phy_queue, phy_change, phydev);
|
|
|
|
if (request_irq(phydev->irq, phy_interrupt,
|
|
IRQF_SHARED,
|
|
"phy_interrupt",
|
|
phydev) < 0) {
|
|
printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n",
|
|
phydev->bus->name,
|
|
phydev->irq);
|
|
phydev->irq = PHY_POLL;
|
|
return 0;
|
|
}
|
|
|
|
err = phy_enable_interrupts(phydev);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(phy_start_interrupts);
|
|
|
|
int phy_stop_interrupts(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
|
|
err = phy_disable_interrupts(phydev);
|
|
|
|
if (err)
|
|
phy_error(phydev);
|
|
|
|
free_irq(phydev->irq, phydev);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(phy_stop_interrupts);
|
|
|
|
|
|
/* Scheduled by the phy_interrupt/timer to handle PHY changes */
|
|
static void phy_change(void *data)
|
|
{
|
|
int err;
|
|
struct phy_device *phydev = data;
|
|
|
|
err = phy_disable_interrupts(phydev);
|
|
|
|
if (err)
|
|
goto phy_err;
|
|
|
|
spin_lock(&phydev->lock);
|
|
if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
|
|
phydev->state = PHY_CHANGELINK;
|
|
spin_unlock(&phydev->lock);
|
|
|
|
enable_irq(phydev->irq);
|
|
|
|
/* Reenable interrupts */
|
|
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
|
|
|
|
if (err)
|
|
goto irq_enable_err;
|
|
|
|
return;
|
|
|
|
irq_enable_err:
|
|
disable_irq(phydev->irq);
|
|
phy_err:
|
|
phy_error(phydev);
|
|
}
|
|
|
|
/* Bring down the PHY link, and stop checking the status. */
|
|
void phy_stop(struct phy_device *phydev)
|
|
{
|
|
spin_lock(&phydev->lock);
|
|
|
|
if (PHY_HALTED == phydev->state)
|
|
goto out_unlock;
|
|
|
|
if (phydev->irq != PHY_POLL) {
|
|
/* Clear any pending interrupts */
|
|
phy_clear_interrupt(phydev);
|
|
|
|
/* Disable PHY Interrupts */
|
|
phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
|
|
}
|
|
|
|
phydev->state = PHY_HALTED;
|
|
|
|
out_unlock:
|
|
spin_unlock(&phydev->lock);
|
|
}
|
|
|
|
|
|
/* phy_start
|
|
*
|
|
* description: Indicates the attached device's readiness to
|
|
* handle PHY-related work. Used during startup to start the
|
|
* PHY, and after a call to phy_stop() to resume operation.
|
|
* Also used to indicate the MDIO bus has cleared an error
|
|
* condition.
|
|
*/
|
|
void phy_start(struct phy_device *phydev)
|
|
{
|
|
spin_lock(&phydev->lock);
|
|
|
|
switch (phydev->state) {
|
|
case PHY_STARTING:
|
|
phydev->state = PHY_PENDING;
|
|
break;
|
|
case PHY_READY:
|
|
phydev->state = PHY_UP;
|
|
break;
|
|
case PHY_HALTED:
|
|
phydev->state = PHY_RESUMING;
|
|
default:
|
|
break;
|
|
}
|
|
spin_unlock(&phydev->lock);
|
|
}
|
|
EXPORT_SYMBOL(phy_stop);
|
|
EXPORT_SYMBOL(phy_start);
|
|
|
|
/* PHY timer which handles the state machine */
|
|
static void phy_timer(unsigned long data)
|
|
{
|
|
struct phy_device *phydev = (struct phy_device *)data;
|
|
int needs_aneg = 0;
|
|
int err = 0;
|
|
|
|
spin_lock(&phydev->lock);
|
|
|
|
if (phydev->adjust_state)
|
|
phydev->adjust_state(phydev->attached_dev);
|
|
|
|
switch(phydev->state) {
|
|
case PHY_DOWN:
|
|
case PHY_STARTING:
|
|
case PHY_READY:
|
|
case PHY_PENDING:
|
|
break;
|
|
case PHY_UP:
|
|
needs_aneg = 1;
|
|
|
|
phydev->link_timeout = PHY_AN_TIMEOUT;
|
|
|
|
break;
|
|
case PHY_AN:
|
|
/* Check if negotiation is done. Break
|
|
* if there's an error */
|
|
err = phy_aneg_done(phydev);
|
|
if (err < 0)
|
|
break;
|
|
|
|
/* If auto-negotiation is done, we change to
|
|
* either RUNNING, or NOLINK */
|
|
if (err > 0) {
|
|
err = phy_read_status(phydev);
|
|
|
|
if (err)
|
|
break;
|
|
|
|
if (phydev->link) {
|
|
phydev->state = PHY_RUNNING;
|
|
netif_carrier_on(phydev->attached_dev);
|
|
} else {
|
|
phydev->state = PHY_NOLINK;
|
|
netif_carrier_off(phydev->attached_dev);
|
|
}
|
|
|
|
phydev->adjust_link(phydev->attached_dev);
|
|
|
|
} else if (0 == phydev->link_timeout--) {
|
|
/* The counter expired, so either we
|
|
* switch to forced mode, or the
|
|
* magic_aneg bit exists, and we try aneg
|
|
* again */
|
|
if (!(phydev->drv->flags & PHY_HAS_MAGICANEG)) {
|
|
int idx;
|
|
|
|
/* We'll start from the
|
|
* fastest speed, and work
|
|
* our way down */
|
|
idx = phy_find_valid(0,
|
|
phydev->supported);
|
|
|
|
phydev->speed = settings[idx].speed;
|
|
phydev->duplex = settings[idx].duplex;
|
|
|
|
phydev->autoneg = AUTONEG_DISABLE;
|
|
phydev->state = PHY_FORCING;
|
|
phydev->link_timeout =
|
|
PHY_FORCE_TIMEOUT;
|
|
|
|
pr_info("Trying %d/%s\n",
|
|
phydev->speed,
|
|
DUPLEX_FULL ==
|
|
phydev->duplex ?
|
|
"FULL" : "HALF");
|
|
}
|
|
|
|
needs_aneg = 1;
|
|
}
|
|
break;
|
|
case PHY_NOLINK:
|
|
err = phy_read_status(phydev);
|
|
|
|
if (err)
|
|
break;
|
|
|
|
if (phydev->link) {
|
|
phydev->state = PHY_RUNNING;
|
|
netif_carrier_on(phydev->attached_dev);
|
|
phydev->adjust_link(phydev->attached_dev);
|
|
}
|
|
break;
|
|
case PHY_FORCING:
|
|
err = phy_read_status(phydev);
|
|
|
|
if (err)
|
|
break;
|
|
|
|
if (phydev->link) {
|
|
phydev->state = PHY_RUNNING;
|
|
netif_carrier_on(phydev->attached_dev);
|
|
} else {
|
|
if (0 == phydev->link_timeout--) {
|
|
phy_force_reduction(phydev);
|
|
needs_aneg = 1;
|
|
}
|
|
}
|
|
|
|
phydev->adjust_link(phydev->attached_dev);
|
|
break;
|
|
case PHY_RUNNING:
|
|
/* Only register a CHANGE if we are
|
|
* polling */
|
|
if (PHY_POLL == phydev->irq)
|
|
phydev->state = PHY_CHANGELINK;
|
|
break;
|
|
case PHY_CHANGELINK:
|
|
err = phy_read_status(phydev);
|
|
|
|
if (err)
|
|
break;
|
|
|
|
if (phydev->link) {
|
|
phydev->state = PHY_RUNNING;
|
|
netif_carrier_on(phydev->attached_dev);
|
|
} else {
|
|
phydev->state = PHY_NOLINK;
|
|
netif_carrier_off(phydev->attached_dev);
|
|
}
|
|
|
|
phydev->adjust_link(phydev->attached_dev);
|
|
|
|
if (PHY_POLL != phydev->irq)
|
|
err = phy_config_interrupt(phydev,
|
|
PHY_INTERRUPT_ENABLED);
|
|
break;
|
|
case PHY_HALTED:
|
|
if (phydev->link) {
|
|
phydev->link = 0;
|
|
netif_carrier_off(phydev->attached_dev);
|
|
phydev->adjust_link(phydev->attached_dev);
|
|
}
|
|
break;
|
|
case PHY_RESUMING:
|
|
|
|
err = phy_clear_interrupt(phydev);
|
|
|
|
if (err)
|
|
break;
|
|
|
|
err = phy_config_interrupt(phydev,
|
|
PHY_INTERRUPT_ENABLED);
|
|
|
|
if (err)
|
|
break;
|
|
|
|
if (AUTONEG_ENABLE == phydev->autoneg) {
|
|
err = phy_aneg_done(phydev);
|
|
if (err < 0)
|
|
break;
|
|
|
|
/* err > 0 if AN is done.
|
|
* Otherwise, it's 0, and we're
|
|
* still waiting for AN */
|
|
if (err > 0) {
|
|
phydev->state = PHY_RUNNING;
|
|
} else {
|
|
phydev->state = PHY_AN;
|
|
phydev->link_timeout = PHY_AN_TIMEOUT;
|
|
}
|
|
} else
|
|
phydev->state = PHY_RUNNING;
|
|
break;
|
|
}
|
|
|
|
spin_unlock(&phydev->lock);
|
|
|
|
if (needs_aneg)
|
|
err = phy_start_aneg(phydev);
|
|
|
|
if (err < 0)
|
|
phy_error(phydev);
|
|
|
|
mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ);
|
|
}
|
|
|