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PHY fixed driver: rework release path and update phy_id notation

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device_bind_driver() error code returning has been fixed.  release()
function has been written, so that to free resources in correct way; the
release path is now clean.

Before the rework, it used to cause
 Device 'fixed@100:1' does not have a release() function, it is broken
 and must be fixed.
 BUG: at drivers/base/core.c:104 device_release()

 Call Trace:
  [<ffffffff802ec380>] kobject_cleanup+0x53/0x7e
  [<ffffffff802ec3ab>] kobject_release+0x0/0x9
  [<ffffffff802ecf3f>] kref_put+0x74/0x81
  [<ffffffff8035493b>] fixed_mdio_register_device+0x230/0x265
  [<ffffffff80564d31>] fixed_init+0x1f/0x35
  [<ffffffff802071a4>] init+0x147/0x2fb
  [<ffffffff80223b6e>] schedule_tail+0x36/0x92
  [<ffffffff8020a678>] child_rip+0xa/0x12
  [<ffffffff80311714>] acpi_ds_init_one_object+0x0/0x83
  [<ffffffff8020705d>] init+0x0/0x2fb
  [<ffffffff8020a66e>] child_rip+0x0/0x12

Also changed the notation of the fixed phy definition on
mdio bus to the form of <speed>+<duplex> to make it able to be used by
gianfar and ucc_geth that define phy_id strictly as "%d:%d" and cleaned up
the whitespace issues.

Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Vitaly Bordug 2007-08-10 14:05:16 -07:00 committed by David S. Miller
parent cdcc520d7b
commit 7c32f470f4
3 changed files with 207 additions and 155 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/net/phy/Kconfig
View File

@ -76,4 +76,18 @@ config FIXED_MII_100_FDX
bool "Emulation for 100M Fdx fixed PHY behavior"
depends on FIXED_PHY
config FIXED_MII_1000_FDX
bool "Emulation for 1000M Fdx fixed PHY behavior"
depends on FIXED_PHY
config FIXED_MII_AMNT
int "Number of emulated PHYs to allocate "
depends on FIXED_PHY
default "1"
---help---
Sometimes it is required to have several independent emulated
PHYs on the bus (in case of multi-eth but phy-less HW for instance).
This control will have specified number allocated for each fixed
PHY type enabled.
endif # PHYLIB

310
drivers/net/phy/fixed.c
View File

@ -30,53 +30,31 @@
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#define MII_REGS_NUM 7
/*
The idea is to emulate normal phy behavior by responding with
pre-defined values to mii BMCR read, so that read_status hook could
take all the needed info.
*/
struct fixed_phy_status {
u8 link;
u16 speed;
u8 duplex;
};
/*-----------------------------------------------------------------------------
* Private information hoder for mii_bus
*-----------------------------------------------------------------------------*/
struct fixed_info {
u16 *regs;
u8 regs_num;
struct fixed_phy_status phy_status;
struct phy_device *phydev; /* pointer to the container */
/* link & speed cb */
int(*link_update)(struct net_device*, struct fixed_phy_status*);
};
/* we need to track the allocated pointers in order to free them on exit */
static struct fixed_info *fixed_phy_ptrs[CONFIG_FIXED_MII_AMNT*MAX_PHY_AMNT];
/*-----------------------------------------------------------------------------
* If something weird is required to be done with link/speed,
* network driver is able to assign a function to implement this.
* May be useful for PHY's that need to be software-driven.
*-----------------------------------------------------------------------------*/
int fixed_mdio_set_link_update(struct phy_device* phydev,
int(*link_update)(struct net_device*, struct fixed_phy_status*))
int fixed_mdio_set_link_update(struct phy_device *phydev,
int (*link_update) (struct net_device *,
struct fixed_phy_status *))
{
struct fixed_info *fixed;
if(link_update == NULL)
if (link_update == NULL)
return -EINVAL;
if(phydev) {
if(phydev->bus) {
if (phydev) {
if (phydev->bus) {
fixed = phydev->bus->priv;
fixed->link_update = link_update;
return 0;
@ -84,54 +62,64 @@ int fixed_mdio_set_link_update(struct phy_device* phydev,
}
return -EINVAL;
}
EXPORT_SYMBOL(fixed_mdio_set_link_update);
struct fixed_info *fixed_mdio_get_phydev (int phydev_ind)
{
if (phydev_ind >= MAX_PHY_AMNT)
return NULL;
return fixed_phy_ptrs[phydev_ind];
}
EXPORT_SYMBOL(fixed_mdio_get_phydev);
/*-----------------------------------------------------------------------------
* This is used for updating internal mii regs from the status
*-----------------------------------------------------------------------------*/
#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX)
#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX) || defined(CONFIG_FIXED_MII_1000_FDX)
static int fixed_mdio_update_regs(struct fixed_info *fixed)
{
u16 *regs = fixed->regs;
u16 bmsr = 0;
u16 bmcr = 0;
if(!regs) {
if (!regs) {
printk(KERN_ERR "%s: regs not set up", __FUNCTION__);
return -EINVAL;
}
if(fixed->phy_status.link)
if (fixed->phy_status.link)
bmsr |= BMSR_LSTATUS;
if(fixed->phy_status.duplex) {
if (fixed->phy_status.duplex) {
bmcr |= BMCR_FULLDPLX;
switch ( fixed->phy_status.speed ) {
switch (fixed->phy_status.speed) {
case 100:
bmsr |= BMSR_100FULL;
bmcr |= BMCR_SPEED100;
break;
break;
case 10:
bmsr |= BMSR_10FULL;
break;
break;
}
} else {
switch ( fixed->phy_status.speed ) {
switch (fixed->phy_status.speed) {
case 100:
bmsr |= BMSR_100HALF;
bmcr |= BMCR_SPEED100;
break;
break;
case 10:
bmsr |= BMSR_100HALF;
break;
break;
}
}
regs[MII_BMCR] = bmcr;
regs[MII_BMSR] = bmsr | 0x800; /*we are always capable of 10 hdx*/
regs[MII_BMCR] = bmcr;
regs[MII_BMSR] = bmsr | 0x800; /*we are always capable of 10 hdx */
return 0;
}
@ -141,29 +129,30 @@ static int fixed_mii_read(struct mii_bus *bus, int phy_id, int location)
struct fixed_info *fixed = bus->priv;
/* if user has registered link update callback, use it */
if(fixed->phydev)
if(fixed->phydev->attached_dev) {
if(fixed->link_update) {
if (fixed->phydev)
if (fixed->phydev->attached_dev) {
if (fixed->link_update) {
fixed->link_update(fixed->phydev->attached_dev,
&fixed->phy_status);
&fixed->phy_status);
fixed_mdio_update_regs(fixed);
}
}
}
if ((unsigned int)location >= fixed->regs_num)
return -1;
return fixed->regs[location];
}
static int fixed_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
static int fixed_mii_write(struct mii_bus *bus, int phy_id, int location,
u16 val)
{
/* do nothing for now*/
/* do nothing for now */
return 0;
}
static int fixed_mii_reset(struct mii_bus *bus)
{
/*nothing here - no way/need to reset it*/
/*nothing here - no way/need to reset it */
return 0;
}
#endif
@ -171,8 +160,8 @@ static int fixed_mii_reset(struct mii_bus *bus)
static int fixed_config_aneg(struct phy_device *phydev)
{
/* :TODO:03/13/2006 09:45:37 PM::
The full autoneg funcionality can be emulated,
but no need to have anything here for now
The full autoneg funcionality can be emulated,
but no need to have anything here for now
*/
return 0;
}
@ -182,59 +171,79 @@ static int fixed_config_aneg(struct phy_device *phydev)
* match will never return true...
*-----------------------------------------------------------------------------*/
static struct phy_driver fixed_mdio_driver = {
.name = "Fixed PHY",
.features = PHY_BASIC_FEATURES,
.config_aneg = fixed_config_aneg,
.read_status = genphy_read_status,
.driver = { .owner = THIS_MODULE,},
.name = "Fixed PHY",
#ifdef CONFIG_FIXED_MII_1000_FDX
.features = PHY_GBIT_FEATURES,
#else
.features = PHY_BASIC_FEATURES,
#endif
.config_aneg = fixed_config_aneg,
.read_status = genphy_read_status,
.driver = { .owner = THIS_MODULE, },
};
static void fixed_mdio_release(struct device *dev)
{
struct phy_device *phydev = container_of(dev, struct phy_device, dev);
struct mii_bus *bus = phydev->bus;
struct fixed_info *fixed = bus->priv;
kfree(phydev);
kfree(bus->dev);
kfree(bus);
kfree(fixed->regs);
kfree(fixed);
}
/*-----------------------------------------------------------------------------
* This func is used to create all the necessary stuff, bind
* the fixed phy driver and register all it on the mdio_bus_type.
* speed is either 10 or 100, duplex is boolean.
* speed is either 10 or 100 or 1000, duplex is boolean.
* number is used to create multiple fixed PHYs, so that several devices can
* utilize them simultaneously.
*
* The device on mdio bus will look like [bus_id]:[phy_id],
* bus_id = number
* phy_id = speed+duplex.
*-----------------------------------------------------------------------------*/
#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX)
static int fixed_mdio_register_device(int number, int speed, int duplex)
#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX) || defined(CONFIG_FIXED_MII_1000_FDX)
struct fixed_info *fixed_mdio_register_device(
int bus_id, int speed, int duplex, u8 phy_id)
{
struct mii_bus *new_bus;
struct fixed_info *fixed;
struct phy_device *phydev;
int err = 0;
int err;
struct device* dev = kzalloc(sizeof(struct device), GFP_KERNEL);
struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL);
if (NULL == dev)
return -ENOMEM;
if (dev == NULL)
goto err_dev_alloc;
new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
if (NULL == new_bus) {
kfree(dev);
return -ENOMEM;
}
if (new_bus == NULL)
goto err_bus_alloc;
fixed = kzalloc(sizeof(struct fixed_info), GFP_KERNEL);
if (NULL == fixed) {
kfree(dev);
kfree(new_bus);
return -ENOMEM;
}
if (fixed == NULL)
goto err_fixed_alloc;
fixed->regs = kzalloc(MII_REGS_NUM * sizeof(int), GFP_KERNEL);
if (NULL == fixed->regs)
goto err_fixed_regs_alloc;
fixed->regs = kzalloc(MII_REGS_NUM*sizeof(int), GFP_KERNEL);
fixed->regs_num = MII_REGS_NUM;
fixed->phy_status.speed = speed;
fixed->phy_status.duplex = duplex;
fixed->phy_status.link = 1;
new_bus->name = "Fixed MII Bus",
new_bus->read = &fixed_mii_read,
new_bus->write = &fixed_mii_write,
new_bus->reset = &fixed_mii_reset,
/*set up workspace*/
new_bus->name = "Fixed MII Bus";
new_bus->read = &fixed_mii_read;
new_bus->write = &fixed_mii_write;
new_bus->reset = &fixed_mii_reset;
/*set up workspace */
fixed_mdio_update_regs(fixed);
new_bus->priv = fixed;
@ -243,119 +252,110 @@ static int fixed_mdio_register_device(int number, int speed, int duplex)
/* create phy_device and register it on the mdio bus */
phydev = phy_device_create(new_bus, 0, 0);
if (phydev == NULL)
goto err_phy_dev_create;
/*
Put the phydev pointer into the fixed pack so that bus read/write code could
be able to access for instance attached netdev. Well it doesn't have to do
so, only in case of utilizing user-specified link-update...
* Put the phydev pointer into the fixed pack so that bus read/write
* code could be able to access for instance attached netdev. Well it
* doesn't have to do so, only in case of utilizing user-specified
* link-update...
*/
fixed->phydev = phydev;
if(NULL == phydev) {
err = -ENOMEM;
goto device_create_fail;
}
fixed->phydev = phydev;
phydev->speed = speed;
phydev->duplex = duplex;
phydev->irq = PHY_IGNORE_INTERRUPT;
phydev->dev.bus = &mdio_bus_type;
if(number)
snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
"fixed_%d@%d:%d", number, speed, duplex);
else
snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
"fixed@%d:%d", speed, duplex);
snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
PHY_ID_FMT, bus_id, phy_id);
phydev->bus = new_bus;
err = device_register(&phydev->dev);
if(err) {
printk(KERN_ERR "Phy %s failed to register\n",
phydev->dev.bus_id);
goto bus_register_fail;
}
/*
the mdio bus has phy_id match... In order not to do it
artificially, we are binding the driver here by hand;
it will be the same for all the fixed phys anyway.
*/
phydev->dev.driver = &fixed_mdio_driver.driver;
phydev->dev.release = fixed_mdio_release;
err = phydev->dev.driver->probe(&phydev->dev);
if(err < 0) {
printk(KERN_ERR "Phy %s: problems with fixed driver\n",phydev->dev.bus_id);
goto probe_fail;
if (err < 0) {
printk(KERN_ERR "Phy %s: problems with fixed driver\n",
phydev->dev.bus_id);
goto err_out;
}
err = device_register(&phydev->dev);
if (err) {
printk(KERN_ERR "Phy %s failed to register\n",
phydev->dev.bus_id);
goto err_out;
}
//phydev->state = PHY_RUNNING; /* make phy go up quick, but in 10Mbit/HDX
return fixed;
err = device_bind_driver(&phydev->dev);
if (err)
goto probe_fail;
return 0;
probe_fail:
device_unregister(&phydev->dev);
bus_register_fail:
err_out:
kfree(phydev);
device_create_fail:
kfree(dev);
kfree(new_bus);
err_phy_dev_create:
kfree(fixed->regs);
err_fixed_regs_alloc:
kfree(fixed);
err_fixed_alloc:
kfree(new_bus);
err_bus_alloc:
kfree(dev);
err_dev_alloc:
return NULL;
return err;
}
#endif
MODULE_DESCRIPTION("Fixed PHY device & driver for PAL");
MODULE_AUTHOR("Vitaly Bordug");
MODULE_LICENSE("GPL");
static int __init fixed_init(void)
{
#if 0
int ret;
int duplex = 0;
#endif
/* register on the bus... Not expected to be matched with anything there... */
int cnt = 0;
int i;
/* register on the bus... Not expected to be matched
* with anything there...
*
*/
phy_driver_register(&fixed_mdio_driver);
/* So let the fun begin...
We will create several mdio devices here, and will bound the upper
driver to them.
Then the external software can lookup the phy bus by searching
fixed@speed:duplex, e.g. fixed@100:1, to be connected to the
virtual 100M Fdx phy.
In case several virtual PHYs required, the bus_id will be in form
fixed_<num>@<speed>:<duplex>, which make it able even to define
driver-specific link control callback, if for instance PHY is completely
SW-driven.
*/
#ifdef CONFIG_FIXED_MII_DUPLEX
#if 0
duplex = 1;
/* We will create several mdio devices here, and will bound the upper
* driver to them.
*
* Then the external software can lookup the phy bus by searching
* for 0:101, to be connected to the virtual 100M Fdx phy.
*
* In case several virtual PHYs required, the bus_id will be in form
* [num]:[duplex]+[speed], which make it able even to define
* driver-specific link control callback, if for instance PHY is
* completely SW-driven.
*/
for (i=1; i <= CONFIG_FIXED_MII_AMNT; i++) {
#ifdef CONFIG_FIXED_MII_1000_FDX
fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(0, 1000, 1, i);
#endif
#endif
#ifdef CONFIG_FIXED_MII_100_FDX
fixed_mdio_register_device(0, 100, 1);
fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(1, 100, 1, i);
#endif
#ifdef CONFIG_FIXED_MII_10_FDX
fixed_mdio_register_device(0, 10, 1);
fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(2, 10, 1, i);
#endif
}
return 0;
}
static void __exit fixed_exit(void)
{
int i;
phy_driver_unregister(&fixed_mdio_driver);
/* :WARNING:02/18/2006 04:32:40 AM:: Cleanup all the created stuff */
for (i=0; i < MAX_PHY_AMNT; i++)
if ( fixed_phy_ptrs[i] )
device_unregister(&fixed_phy_ptrs[i]->phydev->dev);
}
module_init(fixed_init);

38
include/linux/phy_fixed.h Normal file
View File

@ -0,0 +1,38 @@
#ifndef __PHY_FIXED_H
#define __PHY_FIXED_H
#define MII_REGS_NUM 29
/* max number of virtual phy stuff */
#define MAX_PHY_AMNT 10
/*
The idea is to emulate normal phy behavior by responding with
pre-defined values to mii BMCR read, so that read_status hook could
take all the needed info.
*/
struct fixed_phy_status {
u8 link;
u16 speed;
u8 duplex;
};
/*-----------------------------------------------------------------------------
* Private information hoder for mii_bus
*-----------------------------------------------------------------------------*/
struct fixed_info {
u16 *regs;
u8 regs_num;
struct fixed_phy_status phy_status;
struct phy_device *phydev; /* pointer to the container */
/* link & speed cb */
int (*link_update) (struct net_device *, struct fixed_phy_status *);
};
int fixed_mdio_set_link_update(struct phy_device *,
int (*link_update) (struct net_device *, struct fixed_phy_status *));
struct fixed_info *fixed_mdio_get_phydev (int phydev_ind);
#endif /* __PHY_FIXED_H */