mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
[PATCH] PHY Layer fixup
This patch adds back the code that was taken out, thus re-enabling: * The PHY Layer to initialize without crashing * Drivers to actually connect to PHYs * The entire PHY Control Layer This patch is used by the gianfar driver, and other drivers which are in development. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Andy Fleming
Jeff Garzik
parent
86f0cd5057
commit
e13934563d
@ -12,6 +12,14 @@ config PHYLIB
|
||||
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
|
||||
|
||||
|
||||
@ -2,8 +2,9 @@
|
||||
|
||||
libphy-objs := phy.o phy_device.o mdio_bus.o
|
||||
|
||||
obj-$(CONFIG_MARVELL_PHY) += libphy.o marvell.o
|
||||
obj-$(CONFIG_DAVICOM_PHY) += libphy.o davicom.o
|
||||
obj-$(CONFIG_CICADA_PHY) += libphy.o cicada.o
|
||||
obj-$(CONFIG_LXT_PHY) += libphy.o lxt.o
|
||||
obj-$(CONFIG_QSEMI_PHY) += libphy.o qsemi.o
|
||||
obj-$(CONFIG_PHYLIB) += libphy.o
|
||||
obj-$(CONFIG_MARVELL_PHY) += marvell.o
|
||||
obj-$(CONFIG_DAVICOM_PHY) += davicom.o
|
||||
obj-$(CONFIG_CICADA_PHY) += cicada.o
|
||||
obj-$(CONFIG_LXT_PHY) += lxt.o
|
||||
obj-$(CONFIG_QSEMI_PHY) += qsemi.o
|
||||
|
||||
@ -38,6 +38,80 @@
|
||||
#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
|
||||
@ -96,4 +170,7 @@ int __init mdio_bus_init(void)
|
||||
return bus_register(&mdio_bus_type);
|
||||
}
|
||||
|
||||
|
||||
void __exit mdio_bus_exit(void)
|
||||
{
|
||||
bus_unregister(&mdio_bus_type);
|
||||
}
|
||||
|
||||
@ -39,10 +39,20 @@
|
||||
#include <asm/irq.h>
|
||||
#include <asm/uaccess.h>
|
||||
|
||||
static void phy_timer(unsigned long data);
|
||||
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 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);
|
||||
|
||||
|
||||
/* Convenience functions for reading/writing a given PHY
|
||||
@ -114,42 +124,6 @@ static inline int phy_aneg_done(struct phy_device *phydev)
|
||||
return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
|
||||
}
|
||||
|
||||
/* phy_start_aneg
|
||||
*
|
||||
* description: Calls the PHY driver's config_aneg, and then
|
||||
* sets the PHY state to PHY_AN if auto-negotiation is enabled,
|
||||
* and to PHY_FORCING if auto-negotiation is disabled. Unless
|
||||
* the PHY is currently HALTED.
|
||||
*/
|
||||
static 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;
|
||||
}
|
||||
|
||||
/* A structure for mapping a particular speed and duplex
|
||||
* combination to a particular SUPPORTED and ADVERTISED value */
|
||||
struct phy_setting {
|
||||
@ -241,7 +215,7 @@ static inline int phy_find_valid(int idx, u32 features)
|
||||
* duplexes. Drop down by one in this order: 1000/FULL,
|
||||
* 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF
|
||||
*/
|
||||
static void phy_sanitize_settings(struct phy_device *phydev)
|
||||
void phy_sanitize_settings(struct phy_device *phydev)
|
||||
{
|
||||
u32 features = phydev->supported;
|
||||
int idx;
|
||||
@ -256,31 +230,7 @@ static void phy_sanitize_settings(struct phy_device *phydev)
|
||||
phydev->speed = settings[idx].speed;
|
||||
phydev->duplex = settings[idx].duplex;
|
||||
}
|
||||
|
||||
/* 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");
|
||||
}
|
||||
EXPORT_SYMBOL(phy_sanitize_settings);
|
||||
|
||||
/* phy_ethtool_sset:
|
||||
* A generic ethtool sset function. Handles all the details
|
||||
@ -291,6 +241,11 @@ static void phy_force_reduction(struct phy_device *phydev)
|
||||
* - 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
|
||||
*
|
||||
* A note about the PHYCONTROL Layer. If you turn off
|
||||
* CONFIG_PHYCONTROL, you will need to read the PHY status
|
||||
* registers after this function completes, and update your
|
||||
* controller manually.
|
||||
*/
|
||||
int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
|
||||
{
|
||||
@ -406,6 +361,51 @@ int phy_mii_ioctl(struct phy_device *phydev,
|
||||
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);
|
||||
|
||||
#ifdef CONFIG_PHYCONTROL
|
||||
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:
|
||||
#endif
|
||||
spin_unlock(&phydev->lock);
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(phy_start_aneg);
|
||||
|
||||
|
||||
#ifdef CONFIG_PHYCONTROL
|
||||
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
|
||||
@ -448,6 +448,32 @@ void phy_stop_machine(struct phy_device *phydev)
|
||||
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
|
||||
@ -462,22 +488,44 @@ void phy_error(struct phy_device *phydev)
|
||||
spin_unlock(&phydev->lock);
|
||||
}
|
||||
|
||||
static int phy_stop_interrupts(struct phy_device *phydev)
|
||||
/* 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_disable_interrupts(phydev);
|
||||
err = phy_clear_interrupt(phydev);
|
||||
|
||||
if (err)
|
||||
phy_error(phydev);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
free_irq(phydev->irq, phydev);
|
||||
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
|
||||
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(phy_enable_interrupts);
|
||||
|
||||
/* Disable the PHY interrupts from the PHY side */
|
||||
static int phy_disable_interrupts(struct phy_device *phydev)
|
||||
int phy_disable_interrupts(struct phy_device *phydev)
|
||||
{
|
||||
int err;
|
||||
|
||||
@ -500,6 +548,138 @@ phy_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);
|
||||
|
||||
/* PHY timer which handles the state machine */
|
||||
static void phy_timer(unsigned long data)
|
||||
@ -688,3 +868,4 @@ static void phy_timer(unsigned long data)
|
||||
mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_PHYCONTROL */
|
||||
|
||||
@ -39,18 +39,9 @@
|
||||
#include <asm/irq.h>
|
||||
#include <asm/uaccess.h>
|
||||
|
||||
static int genphy_config_init(struct phy_device *phydev);
|
||||
|
||||
static struct phy_driver genphy_driver = {
|
||||
.phy_id = 0xffffffff,
|
||||
.phy_id_mask = 0xffffffff,
|
||||
.name = "Generic PHY",
|
||||
.config_init = genphy_config_init,
|
||||
.features = 0,
|
||||
.config_aneg = genphy_config_aneg,
|
||||
.read_status = genphy_read_status,
|
||||
.driver = {.owner = THIS_MODULE, },
|
||||
};
|
||||
static struct phy_driver genphy_driver;
|
||||
extern int mdio_bus_init(void);
|
||||
extern void mdio_bus_exit(void);
|
||||
|
||||
/* get_phy_device
|
||||
*
|
||||
@ -110,6 +101,7 @@ struct phy_device * get_phy_device(struct mii_bus *bus, int addr)
|
||||
return dev;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PHYCONTROL
|
||||
/* phy_prepare_link:
|
||||
*
|
||||
* description: Tells the PHY infrastructure to handle the
|
||||
@ -124,6 +116,132 @@ void phy_prepare_link(struct phy_device *phydev,
|
||||
phydev->adjust_link = handler;
|
||||
}
|
||||
|
||||
/* 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
|
||||
@ -132,7 +250,7 @@ void phy_prepare_link(struct phy_device *phydev,
|
||||
* after sanitizing the values to make sure we only advertise
|
||||
* what is supported
|
||||
*/
|
||||
static int genphy_config_advert(struct phy_device *phydev)
|
||||
int genphy_config_advert(struct phy_device *phydev)
|
||||
{
|
||||
u32 advertise;
|
||||
int adv;
|
||||
@ -190,6 +308,7 @@ static int genphy_config_advert(struct phy_device *phydev)
|
||||
|
||||
return adv;
|
||||
}
|
||||
EXPORT_SYMBOL(genphy_config_advert);
|
||||
|
||||
/* genphy_setup_forced
|
||||
*
|
||||
@ -541,32 +660,37 @@ void phy_driver_unregister(struct phy_driver *drv)
|
||||
}
|
||||
EXPORT_SYMBOL(phy_driver_unregister);
|
||||
|
||||
static struct phy_driver genphy_driver = {
|
||||
.phy_id = 0xffffffff,
|
||||
.phy_id_mask = 0xffffffff,
|
||||
.name = "Generic PHY",
|
||||
.config_init = genphy_config_init,
|
||||
.features = 0,
|
||||
.config_aneg = genphy_config_aneg,
|
||||
.read_status = genphy_read_status,
|
||||
.driver = {.owner= THIS_MODULE, },
|
||||
};
|
||||
|
||||
static int __init phy_init(void)
|
||||
{
|
||||
int rc;
|
||||
extern int mdio_bus_init(void);
|
||||
|
||||
rc = phy_driver_register(&genphy_driver);
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
rc = mdio_bus_init();
|
||||
if (rc)
|
||||
goto out_unreg;
|
||||
return rc;
|
||||
|
||||
return 0;
|
||||
rc = phy_driver_register(&genphy_driver);
|
||||
if (rc)
|
||||
mdio_bus_exit();
|
||||
|
||||
out_unreg:
|
||||
phy_driver_unregister(&genphy_driver);
|
||||
out:
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void __exit phy_exit(void)
|
||||
{
|
||||
phy_driver_unregister(&genphy_driver);
|
||||
mdio_bus_exit();
|
||||
}
|
||||
|
||||
module_init(phy_init);
|
||||
subsys_initcall(phy_init);
|
||||
module_exit(phy_exit);
|
||||
|
||||
@ -334,11 +334,26 @@ int phy_write(struct phy_device *phydev, u16 regnum, u16 val);
|
||||
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);
|
||||
@ -355,6 +370,8 @@ int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
|
||||
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 */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user