* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
- * Copyright (c) 2006 Maciej W. Rozycki
+ * Copyright (c) 2006, 2007 Maciej W. Rozycki
*
* 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
#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/timer.h>
#include <linux/workqueue.h>
+#include <asm/atomic.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
int retval;
struct mii_bus *bus = phydev->bus;
- spin_lock_bh(&bus->mdio_lock);
+ BUG_ON(in_interrupt());
+
+ mutex_lock(&bus->mdio_lock);
retval = bus->read(bus, phydev->addr, regnum);
- spin_unlock_bh(&bus->mdio_lock);
+ mutex_unlock(&bus->mdio_lock);
return retval;
}
int err;
struct mii_bus *bus = phydev->bus;
- spin_lock_bh(&bus->mdio_lock);
+ BUG_ON(in_interrupt());
+
+ mutex_lock(&bus->mdio_lock);
err = bus->write(bus, phydev->addr, regnum, val);
- spin_unlock_bh(&bus->mdio_lock);
+ mutex_unlock(&bus->mdio_lock);
return err;
}
},
};
-#define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting))
+#define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
/**
* phy_find_setting - find a PHY settings array entry that matches speed & duplex
if (mii_data->reg_num == MII_BMCR
&& val & BMCR_RESET
- && phydev->drv->config_init)
+ && phydev->drv->config_init) {
+ phy_scan_fixups(phydev);
phydev->drv->config_init(phydev);
+ }
break;
+
+ default:
+ return -ENOTTY;
}
return 0;
{
int err;
- spin_lock(&phydev->lock);
+ mutex_lock(&phydev->lock);
if (AUTONEG_DISABLE == phydev->autoneg)
phy_sanitize_settings(phydev);
}
out_unlock:
- spin_unlock(&phydev->lock);
+ mutex_unlock(&phydev->lock);
return err;
}
EXPORT_SYMBOL(phy_start_aneg);
static void phy_change(struct work_struct *work);
+static void phy_state_machine(struct work_struct *work);
static void phy_timer(unsigned long data);
/**
{
phydev->adjust_state = handler;
+ INIT_WORK(&phydev->state_queue, phy_state_machine);
init_timer(&phydev->phy_timer);
phydev->phy_timer.function = &phy_timer;
phydev->phy_timer.data = (unsigned long) phydev;
void phy_stop_machine(struct phy_device *phydev)
{
del_timer_sync(&phydev->phy_timer);
+ cancel_work_sync(&phydev->state_queue);
- spin_lock(&phydev->lock);
+ mutex_lock(&phydev->lock);
if (phydev->state > PHY_UP)
phydev->state = PHY_UP;
- spin_unlock(&phydev->lock);
+ mutex_unlock(&phydev->lock);
phydev->adjust_state = NULL;
}
*/
void phy_error(struct phy_device *phydev)
{
- spin_lock(&phydev->lock);
+ mutex_lock(&phydev->lock);
phydev->state = PHY_HALTED;
- spin_unlock(&phydev->lock);
+ mutex_unlock(&phydev->lock);
}
/**
* queue will write the PHY to disable and clear the
* interrupt, and then reenable the irq line. */
disable_irq_nosync(irq);
+ atomic_inc(&phydev->irq_disable);
schedule_work(&phydev->phy_queue);
INIT_WORK(&phydev->phy_queue, phy_change);
+ atomic_set(&phydev->irq_disable, 0);
if (request_irq(phydev->irq, phy_interrupt,
IRQF_SHARED,
"phy_interrupt",
if (err)
phy_error(phydev);
+ free_irq(phydev->irq, phydev);
+
/*
- * Finish any pending work; we might have been scheduled to be called
- * from keventd ourselves, but cancel_work_sync() handles that.
+ * Cannot call flush_scheduled_work() here as desired because
+ * of rtnl_lock(), but we do not really care about what would
+ * be done, except from enable_irq(), so cancel any work
+ * possibly pending and take care of the matter below.
*/
cancel_work_sync(&phydev->phy_queue);
-
- free_irq(phydev->irq, phydev);
+ /*
+ * If work indeed has been cancelled, disable_irq() will have
+ * been left unbalanced from phy_interrupt() and enable_irq()
+ * has to be called so that other devices on the line work.
+ */
+ while (atomic_dec_return(&phydev->irq_disable) >= 0)
+ enable_irq(phydev->irq);
return err;
}
if (err)
goto phy_err;
- spin_lock(&phydev->lock);
+ mutex_lock(&phydev->lock);
if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
phydev->state = PHY_CHANGELINK;
- spin_unlock(&phydev->lock);
+ mutex_unlock(&phydev->lock);
+ atomic_dec(&phydev->irq_disable);
enable_irq(phydev->irq);
/* Reenable interrupts */
irq_enable_err:
disable_irq(phydev->irq);
+ atomic_inc(&phydev->irq_disable);
phy_err:
phy_error(phydev);
}
*/
void phy_stop(struct phy_device *phydev)
{
- spin_lock(&phydev->lock);
+ mutex_lock(&phydev->lock);
if (PHY_HALTED == phydev->state)
goto out_unlock;
- phydev->state = PHY_HALTED;
-
if (phydev->irq != PHY_POLL) {
/* Disable PHY Interrupts */
phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
phy_clear_interrupt(phydev);
}
+ phydev->state = PHY_HALTED;
+
out_unlock:
- spin_unlock(&phydev->lock);
+ mutex_unlock(&phydev->lock);
/*
* Cannot call flush_scheduled_work() here as desired because
*/
void phy_start(struct phy_device *phydev)
{
- spin_lock_bh(&phydev->lock);
+ mutex_lock(&phydev->lock);
switch (phydev->state) {
case PHY_STARTING:
default:
break;
}
- spin_unlock_bh(&phydev->lock);
+ mutex_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)
+/**
+ * phy_state_machine - Handle the state machine
+ * @work: work_struct that describes the work to be done
+ *
+ * Description: Scheduled by the state_queue workqueue each time
+ * phy_timer is triggered.
+ */
+static void phy_state_machine(struct work_struct *work)
{
- struct phy_device *phydev = (struct phy_device *)data;
+ struct phy_device *phydev =
+ container_of(work, struct phy_device, state_queue);
int needs_aneg = 0;
int err = 0;
- spin_lock(&phydev->lock);
+ mutex_lock(&phydev->lock);
if (phydev->adjust_state)
phydev->adjust_state(phydev->attached_dev);
break;
}
- spin_unlock(&phydev->lock);
+ mutex_unlock(&phydev->lock);
if (needs_aneg)
err = phy_start_aneg(phydev);
mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ);
}
+/* PHY timer which schedules the state machine work */
+static void phy_timer(unsigned long data)
+{
+ struct phy_device *phydev = (struct phy_device *)data;
+
+ /*
+ * PHY I/O operations can potentially sleep so we ensure that
+ * it's done from a process context
+ */
+ schedule_work(&phydev->state_queue);
+}
projects / linux-2.6-omap-h63xx.git / blobdiff