devices. This option provides infrastructure for
managing PHY devices.
-config PHYCONTROL
- bool "Support for automatically handling PHY state changes"
- depends on PHYLIB
- help
- Adds code to perform all the work for keeping PHY link
- state (speed/duplex/etc) up-to-date. Also handles
- interrupts.
-
comment "MII PHY device drivers"
depends on PHYLIB
#include <asm/irq.h>
#include <asm/uaccess.h>
-/* mdiobus_register
- *
- * description: Called by a bus driver to bring up all the PHYs
- * on a given bus, and attach them to the bus
- */
-int mdiobus_register(struct mii_bus *bus)
-{
- int i;
- int err = 0;
-
- spin_lock_init(&bus->mdio_lock);
-
- if (NULL == bus || NULL == bus->name ||
- NULL == bus->read ||
- NULL == bus->write)
- return -EINVAL;
-
- if (bus->reset)
- bus->reset(bus);
-
- for (i = 0; i < PHY_MAX_ADDR; i++) {
- struct phy_device *phydev;
-
- phydev = get_phy_device(bus, i);
-
- if (IS_ERR(phydev))
- return PTR_ERR(phydev);
-
- /* There's a PHY at this address
- * We need to set:
- * 1) IRQ
- * 2) bus_id
- * 3) parent
- * 4) bus
- * 5) mii_bus
- * And, we need to register it */
- if (phydev) {
- phydev->irq = bus->irq[i];
-
- phydev->dev.parent = bus->dev;
- phydev->dev.bus = &mdio_bus_type;
- sprintf(phydev->dev.bus_id, "phy%d:%d", bus->id, i);
-
- phydev->bus = bus;
-
- err = device_register(&phydev->dev);
-
- if (err)
- printk(KERN_ERR "phy %d failed to register\n",
- i);
- }
-
- bus->phy_map[i] = phydev;
- }
-
- pr_info("%s: probed\n", bus->name);
-
- return err;
-}
-EXPORT_SYMBOL(mdiobus_register);
-
-void mdiobus_unregister(struct mii_bus *bus)
-{
- int i;
-
- for (i = 0; i < PHY_MAX_ADDR; i++) {
- if (bus->phy_map[i]) {
- device_unregister(&bus->phy_map[i]->dev);
- kfree(bus->phy_map[i]);
- }
- }
-}
-EXPORT_SYMBOL(mdiobus_unregister);
-
/* mdio_bus_match
*
* description: Given a PHY device, and a PHY driver, return 1 if
#include <asm/uaccess.h>
static void phy_timer(unsigned long data);
-
-/* Convenience function to print out the current phy status
- */
-void phy_print_status(struct phy_device *phydev)
-{
- pr_info("%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);
+static int phy_disable_interrupts(struct phy_device *phydev);
+static void phy_sanitize_settings(struct phy_device *phydev);
+static int phy_stop_interrupts(struct phy_device *phydev);
/* Convenience functions for reading/writing a given PHY
* and to PHY_FORCING if auto-negotiation is disabled. Unless
* the PHY is currently HALTED.
*/
-int phy_start_aneg(struct phy_device *phydev)
+static int phy_start_aneg(struct phy_device *phydev)
{
int err;
spin_unlock(&phydev->lock);
return err;
}
-EXPORT_SYMBOL(phy_start_aneg);
-
/* A structure for mapping a particular speed and duplex
* combination to a particular SUPPORTED and ADVERTISED value */
* 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)
+static void phy_sanitize_settings(struct phy_device *phydev)
{
u32 features = phydev->supported;
int idx;
phydev->speed = settings[idx].speed;
phydev->duplex = settings[idx].duplex;
}
-EXPORT_SYMBOL(phy_sanitize_settings);
/* phy_force_reduction
*
spin_unlock(&phydev->lock);
}
-#ifdef CONFIG_PHYCONTROL
-
-static void phy_change(void *data);
-
-/* 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)
+static int phy_stop_interrupts(struct phy_device *phydev)
{
int err;
- err = phy_clear_interrupt(phydev);
+ err = phy_disable_interrupts(phydev);
- if (err < 0)
- return err;
+ if (err)
+ phy_error(phydev);
- err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
+ free_irq(phydev->irq, phydev);
return err;
}
-EXPORT_SYMBOL(phy_enable_interrupts);
/* Disable the PHY interrupts from the PHY side */
-int phy_disable_interrupts(struct phy_device *phydev)
+static int phy_disable_interrupts(struct phy_device *phydev)
{
int err;
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,
- SA_SHIRQ,
- "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);
-
-#endif /* CONFIG_PHYCONTROL */
/* PHY timer which handles the state machine */
static void phy_timer(unsigned long data)
phydev->adjust_link = handler;
}
-#ifdef CONFIG_PHYCONTROL
-/* phy_connect:
- *
- * description: Convenience function for connecting ethernet
- * devices to PHY devices. The default behavior is for
- * the PHY infrastructure to handle everything, and only notify
- * the connected driver when the link status changes. If you
- * don't want, or can't use the provided functionality, you may
- * choose to call only the subset of functions which provide
- * the desired functionality.
- */
-struct phy_device * phy_connect(struct net_device *dev, const char *phy_id,
- void (*handler)(struct net_device *), u32 flags)
-{
- struct phy_device *phydev;
-
- phydev = phy_attach(dev, phy_id, flags);
-
- if (IS_ERR(phydev))
- return phydev;
-
- phy_prepare_link(phydev, handler);
-
- phy_start_machine(phydev, NULL);
-
- if (phydev->irq > 0)
- phy_start_interrupts(phydev);
-
- return phydev;
-}
-EXPORT_SYMBOL(phy_connect);
-
-void phy_disconnect(struct phy_device *phydev)
-{
- if (phydev->irq > 0)
- phy_stop_interrupts(phydev);
-
- phy_stop_machine(phydev);
-
- phydev->adjust_link = NULL;
-
- phy_detach(phydev);
-}
-EXPORT_SYMBOL(phy_disconnect);
-
-#endif /* CONFIG_PHYCONTROL */
-
-/* phy_attach:
- *
- * description: Called by drivers to attach to a particular PHY
- * device. The phy_device is found, and properly hooked up
- * to the phy_driver. If no driver is attached, then the
- * genphy_driver is used. The phy_device is given a ptr to
- * the attaching device, and given a callback for link status
- * change. The phy_device is returned to the attaching
- * driver.
- */
-static int phy_compare_id(struct device *dev, void *data)
-{
- return strcmp((char *)data, dev->bus_id) ? 0 : 1;
-}
-
-struct phy_device *phy_attach(struct net_device *dev,
- const char *phy_id, u32 flags)
-{
- struct bus_type *bus = &mdio_bus_type;
- struct phy_device *phydev;
- struct device *d;
-
- /* Search the list of PHY devices on the mdio bus for the
- * PHY with the requested name */
- d = bus_find_device(bus, NULL, (void *)phy_id, phy_compare_id);
-
- if (d) {
- phydev = to_phy_device(d);
- } else {
- printk(KERN_ERR "%s not found\n", phy_id);
- return ERR_PTR(-ENODEV);
- }
-
- /* Assume that if there is no driver, that it doesn't
- * exist, and we should use the genphy driver. */
- if (NULL == d->driver) {
- int err;
- down_write(&d->bus->subsys.rwsem);
- d->driver = &genphy_driver.driver;
-
- err = d->driver->probe(d);
-
- if (err < 0)
- return ERR_PTR(err);
-
- device_bind_driver(d);
- up_write(&d->bus->subsys.rwsem);
- }
-
- if (phydev->attached_dev) {
- printk(KERN_ERR "%s: %s already attached\n",
- dev->name, phy_id);
- return ERR_PTR(-EBUSY);
- }
-
- phydev->attached_dev = dev;
-
- phydev->dev_flags = flags;
-
- return phydev;
-}
-EXPORT_SYMBOL(phy_attach);
-
-void phy_detach(struct phy_device *phydev)
-{
- phydev->attached_dev = NULL;
-
- /* If the device had no specific driver before (i.e. - it
- * was using the generic driver), we unbind the device
- * from the generic driver so that there's a chance a
- * real driver could be loaded */
- if (phydev->dev.driver == &genphy_driver.driver) {
- down_write(&phydev->dev.bus->subsys.rwsem);
- device_release_driver(&phydev->dev);
- up_write(&phydev->dev.bus->subsys.rwsem);
- }
-}
-EXPORT_SYMBOL(phy_detach);
-
-
/* Generic PHY support and helper functions */
/* genphy_config_advert
* after sanitizing the values to make sure we only advertise
* what is supported
*/
-int genphy_config_advert(struct phy_device *phydev)
+static int genphy_config_advert(struct phy_device *phydev)
{
u32 advertise;
int adv;
return adv;
}
-EXPORT_SYMBOL(genphy_config_advert);
/* genphy_setup_forced
*
struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
int phy_clear_interrupt(struct phy_device *phydev);
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts);
-struct phy_device * phy_attach(struct net_device *dev,
- const char *phy_id, u32 flags);
-struct phy_device * phy_connect(struct net_device *dev, const char *phy_id,
- void (*handler)(struct net_device *), u32 flags);
-void phy_disconnect(struct phy_device *phydev);
-void phy_detach(struct phy_device *phydev);
-void phy_start(struct phy_device *phydev);
-void phy_stop(struct phy_device *phydev);
-int phy_start_aneg(struct phy_device *phydev);
-
-int mdiobus_register(struct mii_bus *bus);
-void mdiobus_unregister(struct mii_bus *bus);
-void phy_sanitize_settings(struct phy_device *phydev);
-int phy_stop_interrupts(struct phy_device *phydev);
static inline int phy_read_status(struct phy_device *phydev) {
return phydev->drv->read_status(phydev);
}
-int genphy_config_advert(struct phy_device *phydev);
int genphy_setup_forced(struct phy_device *phydev);
int genphy_restart_aneg(struct phy_device *phydev);
int genphy_config_aneg(struct phy_device *phydev);
int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
int phy_mii_ioctl(struct phy_device *phydev,
struct mii_ioctl_data *mii_data, int cmd);
-int phy_start_interrupts(struct phy_device *phydev);
-void phy_print_status(struct phy_device *phydev);
extern struct bus_type mdio_bus_type;
#endif /* __PHY_H */
projects / linux-2.6 / commitdiff