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path: root/drivers/net/phy
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-rw-r--r--drivers/net/phy/fixed.c33
-rw-r--r--drivers/net/phy/mdio-bitbang.c4
-rw-r--r--drivers/net/phy/mdio-ofgpio.c11
-rw-r--r--drivers/net/phy/mdio_bus.c231
-rw-r--r--drivers/net/phy/phy.c60
-rw-r--r--drivers/net/phy/phy_device.c49
6 files changed, 256 insertions, 132 deletions
diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c
index 4e07956a483..cf24cc34deb 100644
--- a/drivers/net/phy/fixed.c
+++ b/drivers/net/phy/fixed.c
@@ -24,7 +24,7 @@
struct fixed_mdio_bus {
int irqs[PHY_MAX_ADDR];
- struct mii_bus mii_bus;
+ struct mii_bus *mii_bus;
struct list_head phys;
};
@@ -115,8 +115,7 @@ static int fixed_phy_update_regs(struct fixed_phy *fp)
static int fixed_mdio_read(struct mii_bus *bus, int phy_id, int reg_num)
{
- struct fixed_mdio_bus *fmb = container_of(bus, struct fixed_mdio_bus,
- mii_bus);
+ struct fixed_mdio_bus *fmb = bus->priv;
struct fixed_phy *fp;
if (reg_num >= MII_REGS_NUM)
@@ -213,19 +212,28 @@ static int __init fixed_mdio_bus_init(void)
goto err_pdev;
}
- snprintf(fmb->mii_bus.id, MII_BUS_ID_SIZE, "0");
- fmb->mii_bus.name = "Fixed MDIO Bus";
- fmb->mii_bus.dev = &pdev->dev;
- fmb->mii_bus.read = &fixed_mdio_read;
- fmb->mii_bus.write = &fixed_mdio_write;
- fmb->mii_bus.irq = fmb->irqs;
+ fmb->mii_bus = mdiobus_alloc();
+ if (fmb->mii_bus == NULL) {
+ ret = -ENOMEM;
+ goto err_mdiobus_reg;
+ }
- ret = mdiobus_register(&fmb->mii_bus);
+ snprintf(fmb->mii_bus->id, MII_BUS_ID_SIZE, "0");
+ fmb->mii_bus->name = "Fixed MDIO Bus";
+ fmb->mii_bus->priv = fmb;
+ fmb->mii_bus->parent = &pdev->dev;
+ fmb->mii_bus->read = &fixed_mdio_read;
+ fmb->mii_bus->write = &fixed_mdio_write;
+ fmb->mii_bus->irq = fmb->irqs;
+
+ ret = mdiobus_register(fmb->mii_bus);
if (ret)
- goto err_mdiobus_reg;
+ goto err_mdiobus_alloc;
return 0;
+err_mdiobus_alloc:
+ mdiobus_free(fmb->mii_bus);
err_mdiobus_reg:
platform_device_unregister(pdev);
err_pdev:
@@ -238,7 +246,8 @@ static void __exit fixed_mdio_bus_exit(void)
struct fixed_mdio_bus *fmb = &platform_fmb;
struct fixed_phy *fp, *tmp;
- mdiobus_unregister(&fmb->mii_bus);
+ mdiobus_unregister(fmb->mii_bus);
+ mdiobus_free(fmb->mii_bus);
platform_device_unregister(pdev);
list_for_each_entry_safe(fp, tmp, &fmb->phys, node) {
diff --git a/drivers/net/phy/mdio-bitbang.c b/drivers/net/phy/mdio-bitbang.c
index c01b78013dd..2576055b350 100644
--- a/drivers/net/phy/mdio-bitbang.c
+++ b/drivers/net/phy/mdio-bitbang.c
@@ -165,7 +165,7 @@ struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl)
{
struct mii_bus *bus;
- bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
+ bus = mdiobus_alloc();
if (!bus)
return NULL;
@@ -184,7 +184,7 @@ void free_mdio_bitbang(struct mii_bus *bus)
struct mdiobb_ctrl *ctrl = bus->priv;
module_put(ctrl->ops->owner);
- kfree(bus);
+ mdiobus_free(bus);
}
EXPORT_SYMBOL(free_mdio_bitbang);
diff --git a/drivers/net/phy/mdio-ofgpio.c b/drivers/net/phy/mdio-ofgpio.c
index 7edfc0c3483..2ff97754e57 100644
--- a/drivers/net/phy/mdio-ofgpio.c
+++ b/drivers/net/phy/mdio-ofgpio.c
@@ -122,7 +122,7 @@ static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
if (!new_bus)
- goto out_free_priv;
+ goto out_free_bitbang;
new_bus->name = "GPIO Bitbanged MII",
@@ -142,7 +142,7 @@ static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
if (!strcmp(np->type, "ethernet-phy"))
add_phy(new_bus, np);
- new_bus->dev = &ofdev->dev;
+ new_bus->parent = &ofdev->dev;
dev_set_drvdata(&ofdev->dev, new_bus);
ret = mdiobus_register(new_bus);
@@ -155,9 +155,9 @@ out_free_irqs:
dev_set_drvdata(&ofdev->dev, NULL);
kfree(new_bus->irq);
out_free_bus:
- kfree(new_bus);
-out_free_priv:
free_mdio_bitbang(new_bus);
+out_free_bitbang:
+ kfree(bitbang);
out:
return ret;
}
@@ -168,11 +168,10 @@ static int mdio_ofgpio_remove(struct of_device *ofdev)
struct mdio_gpio_info *bitbang = bus->priv;
mdiobus_unregister(bus);
+ kfree(bus->irq);
free_mdio_bitbang(bus);
dev_set_drvdata(&ofdev->dev, NULL);
- kfree(bus->irq);
kfree(bitbang);
- kfree(bus);
return 0;
}
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 94e0b7ed76f..6671e2da0d5 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -36,6 +36,42 @@
#include <asm/uaccess.h>
/**
+ * mdiobus_alloc - allocate a mii_bus structure
+ *
+ * Description: called by a bus driver to allocate an mii_bus
+ * structure to fill in.
+ */
+struct mii_bus *mdiobus_alloc(void)
+{
+ struct mii_bus *bus;
+
+ bus = kzalloc(sizeof(*bus), GFP_KERNEL);
+ if (bus != NULL)
+ bus->state = MDIOBUS_ALLOCATED;
+
+ return bus;
+}
+EXPORT_SYMBOL(mdiobus_alloc);
+
+/**
+ * mdiobus_release - mii_bus device release callback
+ *
+ * Description: called when the last reference to an mii_bus is
+ * dropped, to free the underlying memory.
+ */
+static void mdiobus_release(struct device *d)
+{
+ struct mii_bus *bus = to_mii_bus(d);
+ BUG_ON(bus->state != MDIOBUS_RELEASED);
+ kfree(bus);
+}
+
+static struct class mdio_bus_class = {
+ .name = "mdio_bus",
+ .dev_release = mdiobus_release,
+};
+
+/**
* mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
* @bus: target mii_bus
*
@@ -54,55 +90,36 @@ int mdiobus_register(struct mii_bus *bus)
NULL == bus->write)
return -EINVAL;
- mutex_init(&bus->mdio_lock);
-
- if (bus->reset)
- bus->reset(bus);
-
- for (i = 0; i < PHY_MAX_ADDR; i++) {
- struct phy_device *phydev;
-
- if (bus->phy_mask & (1 << i)) {
- bus->phy_map[i] = NULL;
- continue;
- }
-
- phydev = get_phy_device(bus, i);
+ BUG_ON(bus->state != MDIOBUS_ALLOCATED &&
+ bus->state != MDIOBUS_UNREGISTERED);
- if (IS_ERR(phydev))
- return PTR_ERR(phydev);
+ bus->dev.parent = bus->parent;
+ bus->dev.class = &mdio_bus_class;
+ bus->dev.groups = NULL;
+ memcpy(bus->dev.bus_id, bus->id, MII_BUS_ID_SIZE);
- /* 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];
+ err = device_register(&bus->dev);
+ if (err) {
+ printk(KERN_ERR "mii_bus %s failed to register\n", bus->id);
+ return -EINVAL;
+ }
- phydev->dev.parent = bus->dev;
- phydev->dev.bus = &mdio_bus_type;
- snprintf(phydev->dev.bus_id, BUS_ID_SIZE, PHY_ID_FMT, bus->id, i);
+ bus->state = MDIOBUS_REGISTERED;
- phydev->bus = bus;
+ mutex_init(&bus->mdio_lock);
- /* Run all of the fixups for this PHY */
- phy_scan_fixups(phydev);
+ if (bus->reset)
+ bus->reset(bus);
- err = device_register(&phydev->dev);
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ bus->phy_map[i] = NULL;
+ if ((bus->phy_mask & (1 << i)) == 0) {
+ struct phy_device *phydev;
- if (err) {
- printk(KERN_ERR "phy %d failed to register\n",
- i);
- phy_device_free(phydev);
- phydev = NULL;
- }
+ phydev = mdiobus_scan(bus, i);
+ if (IS_ERR(phydev))
+ err = PTR_ERR(phydev);
}
-
- bus->phy_map[i] = phydev;
}
pr_info("%s: probed\n", bus->name);
@@ -115,6 +132,10 @@ void mdiobus_unregister(struct mii_bus *bus)
{
int i;
+ BUG_ON(bus->state != MDIOBUS_REGISTERED);
+ bus->state = MDIOBUS_UNREGISTERED;
+
+ device_unregister(&bus->dev);
for (i = 0; i < PHY_MAX_ADDR; i++) {
if (bus->phy_map[i])
device_unregister(&bus->phy_map[i]->dev);
@@ -123,6 +144,122 @@ void mdiobus_unregister(struct mii_bus *bus)
EXPORT_SYMBOL(mdiobus_unregister);
/**
+ * mdiobus_free - free a struct mii_bus
+ * @bus: mii_bus to free
+ *
+ * This function releases the reference to the underlying device
+ * object in the mii_bus. If this is the last reference, the mii_bus
+ * will be freed.
+ */
+void mdiobus_free(struct mii_bus *bus)
+{
+ /*
+ * For compatibility with error handling in drivers.
+ */
+ if (bus->state == MDIOBUS_ALLOCATED) {
+ kfree(bus);
+ return;
+ }
+
+ BUG_ON(bus->state != MDIOBUS_UNREGISTERED);
+ bus->state = MDIOBUS_RELEASED;
+
+ put_device(&bus->dev);
+}
+EXPORT_SYMBOL(mdiobus_free);
+
+struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
+{
+ struct phy_device *phydev;
+ int err;
+
+ phydev = get_phy_device(bus, addr);
+ if (IS_ERR(phydev) || phydev == NULL)
+ return 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 */
+
+ phydev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL;
+
+ phydev->dev.parent = bus->parent;
+ phydev->dev.bus = &mdio_bus_type;
+ snprintf(phydev->dev.bus_id, BUS_ID_SIZE, PHY_ID_FMT, bus->id, addr);
+
+ phydev->bus = bus;
+
+ /* Run all of the fixups for this PHY */
+ phy_scan_fixups(phydev);
+
+ err = device_register(&phydev->dev);
+ if (err) {
+ printk(KERN_ERR "phy %d failed to register\n", addr);
+ phy_device_free(phydev);
+ phydev = NULL;
+ }
+
+ bus->phy_map[addr] = phydev;
+
+ return phydev;
+}
+EXPORT_SYMBOL(mdiobus_scan);
+
+/**
+ * mdiobus_read - Convenience function for reading a given MII mgmt register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @regnum: register number to read
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_read(struct mii_bus *bus, int addr, u16 regnum)
+{
+ int retval;
+
+ BUG_ON(in_interrupt());
+
+ mutex_lock(&bus->mdio_lock);
+ retval = bus->read(bus, addr, regnum);
+ mutex_unlock(&bus->mdio_lock);
+
+ return retval;
+}
+EXPORT_SYMBOL(mdiobus_read);
+
+/**
+ * mdiobus_write - Convenience function for writing a given MII mgmt register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_write(struct mii_bus *bus, int addr, u16 regnum, u16 val)
+{
+ int err;
+
+ BUG_ON(in_interrupt());
+
+ mutex_lock(&bus->mdio_lock);
+ err = bus->write(bus, addr, regnum, val);
+ mutex_unlock(&bus->mdio_lock);
+
+ return err;
+}
+EXPORT_SYMBOL(mdiobus_write);
+
+/**
* mdio_bus_match - determine if given PHY driver supports the given PHY device
* @dev: target PHY device
* @drv: given PHY driver
@@ -174,10 +311,20 @@ EXPORT_SYMBOL(mdio_bus_type);
int __init mdio_bus_init(void)
{
- return bus_register(&mdio_bus_type);
+ int ret;
+
+ ret = class_register(&mdio_bus_class);
+ if (!ret) {
+ ret = bus_register(&mdio_bus_type);
+ if (ret)
+ class_unregister(&mdio_bus_class);
+ }
+
+ return ret;
}
void mdio_bus_exit(void)
{
+ class_unregister(&mdio_bus_class);
bus_unregister(&mdio_bus_type);
}
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 45cc2914d34..df4e6257d4a 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -58,55 +58,6 @@ EXPORT_SYMBOL(phy_print_status);
/**
- * phy_read - Convenience function for reading a given PHY register
- * @phydev: the phy_device struct
- * @regnum: register number to read
- *
- * NOTE: 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;
-
- BUG_ON(in_interrupt());
-
- mutex_lock(&bus->mdio_lock);
- retval = bus->read(bus, phydev->addr, regnum);
- mutex_unlock(&bus->mdio_lock);
-
- return retval;
-}
-EXPORT_SYMBOL(phy_read);
-
-/**
- * phy_write - Convenience function for writing a given PHY register
- * @phydev: the phy_device struct
- * @regnum: register number to write
- * @val: value to write to @regnum
- *
- * NOTE: MUST NOT be called from interrupt context,
- * because the bus read/write functions may wait for an interrupt
- * to conclude the operation.
- */
-int phy_write(struct phy_device *phydev, u16 regnum, u16 val)
-{
- int err;
- struct mii_bus *bus = phydev->bus;
-
- BUG_ON(in_interrupt());
-
- mutex_lock(&bus->mdio_lock);
- err = bus->write(bus, phydev->addr, regnum, val);
- mutex_unlock(&bus->mdio_lock);
-
- return err;
-}
-EXPORT_SYMBOL(phy_write);
-
-/**
* phy_clear_interrupt - Ack the phy device's interrupt
* @phydev: the phy_device struct
*
@@ -366,7 +317,8 @@ int phy_mii_ioctl(struct phy_device *phydev,
switch (cmd) {
case SIOCGMIIPHY:
mii_data->phy_id = phydev->addr;
- break;
+ /* fall through */
+
case SIOCGMIIREG:
mii_data->val_out = phy_read(phydev, mii_data->reg_num);
break;
@@ -413,7 +365,7 @@ int phy_mii_ioctl(struct phy_device *phydev,
break;
default:
- return -ENOTTY;
+ return -EOPNOTSUPP;
}
return 0;
@@ -728,6 +680,12 @@ static void phy_change(struct work_struct *work)
if (err)
goto irq_enable_err;
+ /* Stop timer and run the state queue now. The work function for
+ * state_queue will start the timer up again.
+ */
+ del_timer(&phydev->phy_timer);
+ schedule_work(&phydev->state_queue);
+
return;
irq_enable_err:
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 16a0e7de588..17162748005 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -419,13 +419,14 @@ EXPORT_SYMBOL(phy_detach);
*
* Description: Writes MII_ADVERTISE with the appropriate values,
* after sanitizing the values to make sure we only advertise
- * what is supported.
+ * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
+ * hasn't changed, and > 0 if it has changed.
*/
int genphy_config_advert(struct phy_device *phydev)
{
u32 advertise;
- int adv;
- int err;
+ int oldadv, adv;
+ int err, changed = 0;
/* Only allow advertising what
* this PHY supports */
@@ -433,7 +434,7 @@ int genphy_config_advert(struct phy_device *phydev)
advertise = phydev->advertising;
/* Setup standard advertisement */
- adv = phy_read(phydev, MII_ADVERTISE);
+ oldadv = adv = phy_read(phydev, MII_ADVERTISE);
if (adv < 0)
return adv;
@@ -453,15 +454,18 @@ int genphy_config_advert(struct phy_device *phydev)
if (advertise & ADVERTISED_Asym_Pause)
adv |= ADVERTISE_PAUSE_ASYM;
- err = phy_write(phydev, MII_ADVERTISE, adv);
+ if (adv != oldadv) {
+ err = phy_write(phydev, MII_ADVERTISE, adv);
- if (err < 0)
- return err;
+ if (err < 0)
+ return err;
+ changed = 1;
+ }
/* Configure gigabit if it's supported */
if (phydev->supported & (SUPPORTED_1000baseT_Half |
SUPPORTED_1000baseT_Full)) {
- adv = phy_read(phydev, MII_CTRL1000);
+ oldadv = adv = phy_read(phydev, MII_CTRL1000);
if (adv < 0)
return adv;
@@ -471,13 +475,17 @@ int genphy_config_advert(struct phy_device *phydev)
adv |= ADVERTISE_1000HALF;
if (advertise & SUPPORTED_1000baseT_Full)
adv |= ADVERTISE_1000FULL;
- err = phy_write(phydev, MII_CTRL1000, adv);
- if (err < 0)
- return err;
+ if (adv != oldadv) {
+ err = phy_write(phydev, MII_CTRL1000, adv);
+
+ if (err < 0)
+ return err;
+ changed = 1;
+ }
}
- return adv;
+ return changed;
}
EXPORT_SYMBOL(genphy_config_advert);
@@ -561,19 +569,22 @@ int genphy_restart_aneg(struct phy_device *phydev)
*/
int genphy_config_aneg(struct phy_device *phydev)
{
- int err = 0;
+ int result = 0;
if (AUTONEG_ENABLE == phydev->autoneg) {
- err = genphy_config_advert(phydev);
+ int result = genphy_config_advert(phydev);
- if (err < 0)
- return err;
+ if (result < 0) /* error */
+ return result;
- err = genphy_restart_aneg(phydev);
+ /* Only restart aneg if we are advertising something different
+ * than we were before. */
+ if (result > 0)
+ result = genphy_restart_aneg(phydev);
} else
- err = genphy_setup_forced(phydev);
+ result = genphy_setup_forced(phydev);
- return err;
+ return result;
}
EXPORT_SYMBOL(genphy_config_aneg);