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[PATCH] PHY: Add support for configuring the PHY connection interface

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Most PHYs connect to an ethernet controller over a GMII or MII
interface.  However, a growing number are connected over
different interfaces, such as RGMII or SGMII.

The ethernet driver will tell the PHY what type of connection it
is by setting it manually, or passing it in through phy_connect
(or phy_attach).

Changes include:
* Updates to documentation
* Updates to PHY Lib consumers
* Changes to PHY Lib to add interface support
* Some minor changes to whitespace in phy.h
* gianfar driver now detects interface and passes appropriate
  value to PHY Lib
Signed-off-by: Andrew Fleming <afleming@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Andy Fleming 2006-12-01 12:01:06 -06:00 committed by Jeff Garzik
parent cabdfb373a
commit e8a2b6a420
7 changed files with 93 additions and 23 deletions
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13
Documentation/networking/phy.txt
View File

@ -1,7 +1,7 @@
-------
PHY Abstraction Layer
(Updated 2005-07-21)
(Updated 2006-11-30)
Purpose
@ -97,11 +97,12 @@ Letting the PHY Abstraction Layer do Everything
Next, you need to know the device name of the PHY connected to this device.
The name will look something like, "phy0:0", where the first number is the
bus id, and the second is the PHY's address on that bus.
bus id, and the second is the PHY's address on that bus. Typically,
the bus is responsible for making its ID unique.
Now, to connect, just call this function:
phydev = phy_connect(dev, phy_name, &adjust_link, flags);
phydev = phy_connect(dev, phy_name, &adjust_link, flags, interface);
phydev is a pointer to the phy_device structure which represents the PHY. If
phy_connect is successful, it will return the pointer. dev, here, is the
@ -115,6 +116,10 @@ Letting the PHY Abstraction Layer do Everything
This is useful if the system has put hardware restrictions on
the PHY/controller, of which the PHY needs to be aware.
interface is a u32 which specifies the connection type used
between the controller and the PHY. Examples are GMII, MII,
RGMII, and SGMII. For a full list, see include/linux/phy.h
Now just make sure that phydev->supported and phydev->advertising have any
values pruned from them which don't make sense for your controller (a 10/100
controller may be connected to a gigabit capable PHY, so you would need to
@ -191,7 +196,7 @@ Doing it all yourself
start, or disables then frees them for stop.
struct phy_device * phy_attach(struct net_device *dev, const char *phy_id,
u32 flags);
u32 flags, phy_interface_t interface);
Attaches a network device to a particular PHY, binding the PHY to a generic
driver if none was found during bus initialization. Passes in

3
drivers/net/au1000_eth.c
View File

@ -360,7 +360,8 @@ static int mii_probe (struct net_device *dev)
BUG_ON(!phydev);
BUG_ON(phydev->attached_dev);
phydev = phy_connect(dev, phydev->dev.bus_id, &au1000_adjust_link, 0);
phydev = phy_connect(dev, phydev->dev.bus_id, &au1000_adjust_link, 0,
PHY_INTERFACE_MODE_MII);
if (IS_ERR(phydev)) {
printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);

3
drivers/net/fs_enet/fs_enet-main.c
View File

@ -779,7 +779,8 @@ static int fs_init_phy(struct net_device *dev)
fep->oldspeed = 0;
fep->oldduplex = -1;
if(fep->fpi->bus_id)
phydev = phy_connect(dev, fep->fpi->bus_id, &fs_adjust_link, 0);
phydev = phy_connect(dev, fep->fpi->bus_id, &fs_adjust_link, 0,
PHY_INTERFACE_MODE_MII);
else {
printk("No phy bus ID specified in BSP code\n");
return -EINVAL;

39
drivers/net/gianfar.c
View File

@ -9,7 +9,7 @@
* Author: Andy Fleming
* Maintainer: Kumar Gala
*
* Copyright (c) 2002-2004 Freescale Semiconductor, Inc.
* Copyright (c) 2002-2006 Freescale Semiconductor, Inc.
*
* 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
@ -398,6 +398,38 @@ static int gfar_remove(struct platform_device *pdev)
}
/* Reads the controller's registers to determine what interface
* connects it to the PHY.
*/
static phy_interface_t gfar_get_interface(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
u32 ecntrl = gfar_read(&priv->regs->ecntrl);
if (ecntrl & ECNTRL_SGMII_MODE)
return PHY_INTERFACE_MODE_SGMII;
if (ecntrl & ECNTRL_TBI_MODE) {
if (ecntrl & ECNTRL_REDUCED_MODE)
return PHY_INTERFACE_MODE_RTBI;
else
return PHY_INTERFACE_MODE_TBI;
}
if (ecntrl & ECNTRL_REDUCED_MODE) {
if (ecntrl & ECNTRL_REDUCED_MII_MODE)
return PHY_INTERFACE_MODE_RMII;
else
return PHY_INTERFACE_MODE_RGMII;
}
if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
return PHY_INTERFACE_MODE_GMII;
return PHY_INTERFACE_MODE_MII;
}
/* Initializes driver's PHY state, and attaches to the PHY.
* Returns 0 on success.
*/
@ -409,6 +441,7 @@ static int init_phy(struct net_device *dev)
SUPPORTED_1000baseT_Full : 0;
struct phy_device *phydev;
char phy_id[BUS_ID_SIZE];
phy_interface_t interface;
priv->oldlink = 0;
priv->oldspeed = 0;
@ -416,7 +449,9 @@ static int init_phy(struct net_device *dev)
snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, priv->einfo->bus_id, priv->einfo->phy_id);
phydev = phy_connect(dev, phy_id, &adjust_link, 0);
interface = gfar_get_interface(dev);
phydev = phy_connect(dev, phy_id, &adjust_link, 0, interface);
if (IS_ERR(phydev)) {
printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);

3
drivers/net/gianfar.h
View File

@ -160,7 +160,10 @@ extern const char gfar_driver_version[];
#define ECNTRL_INIT_SETTINGS 0x00001000
#define ECNTRL_TBI_MODE 0x00000020
#define ECNTRL_REDUCED_MODE 0x00000010
#define ECNTRL_R100 0x00000008
#define ECNTRL_REDUCED_MII_MODE 0x00000004
#define ECNTRL_SGMII_MODE 0x00000002
#define MRBLR_INIT_SETTINGS DEFAULT_RX_BUFFER_SIZE

29
drivers/net/phy/phy_device.c
View File

@ -59,6 +59,7 @@ struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id)
dev->duplex = -1;
dev->pause = dev->asym_pause = 0;
dev->link = 1;
dev->interface = PHY_INTERFACE_MODE_GMII;
dev->autoneg = AUTONEG_ENABLE;
@ -137,11 +138,12 @@ void phy_prepare_link(struct phy_device *phydev,
* the desired functionality.
*/
struct phy_device * phy_connect(struct net_device *dev, const char *phy_id,
void (*handler)(struct net_device *), u32 flags)
void (*handler)(struct net_device *), u32 flags,
u32 interface)
{
struct phy_device *phydev;
phydev = phy_attach(dev, phy_id, flags);
phydev = phy_attach(dev, phy_id, flags, interface);
if (IS_ERR(phydev))
return phydev;
@ -186,7 +188,7 @@ static int phy_compare_id(struct device *dev, void *data)
}
struct phy_device *phy_attach(struct net_device *dev,
const char *phy_id, u32 flags)
const char *phy_id, u32 flags, u32 interface)
{
struct bus_type *bus = &mdio_bus_type;
struct phy_device *phydev;
@ -231,6 +233,20 @@ struct phy_device *phy_attach(struct net_device *dev,
phydev->dev_flags = flags;
phydev->interface = interface;
/* Do initial configuration here, now that
* we have certain key parameters
* (dev_flags and interface) */
if (phydev->drv->config_init) {
int err;
err = phydev->drv->config_init(phydev);
if (err < 0)
return ERR_PTR(err);
}
return phydev;
}
EXPORT_SYMBOL(phy_attach);
@ -612,13 +628,8 @@ static int phy_probe(struct device *dev)
spin_unlock(&phydev->lock);
if (err < 0)
return err;
if (phydev->drv->config_init)
err = phydev->drv->config_init(phydev);
return err;
}
static int phy_remove(struct device *dev)

26
include/linux/phy.h
View File

@ -47,15 +47,26 @@
#define PHY_HAS_INTERRUPT 0x00000001
#define PHY_HAS_MAGICANEG 0x00000002
/* Interface Mode definitions */
typedef enum {
PHY_INTERFACE_MODE_MII,
PHY_INTERFACE_MODE_GMII,
PHY_INTERFACE_MODE_SGMII,
PHY_INTERFACE_MODE_TBI,
PHY_INTERFACE_MODE_RMII,
PHY_INTERFACE_MODE_RGMII,
PHY_INTERFACE_MODE_RTBI
} phy_interface_t;
#define MII_BUS_MAX 4
#define PHY_INIT_TIMEOUT 100000
#define PHY_INIT_TIMEOUT 100000
#define PHY_STATE_TIME 1
#define PHY_FORCE_TIMEOUT 10
#define PHY_AN_TIMEOUT 10
#define PHY_MAX_ADDR 32
#define PHY_MAX_ADDR 32
/* Used when trying to connect to a specific phy (mii bus id:phy device id) */
#define PHY_ID_FMT "%x:%02x"
@ -87,8 +98,8 @@ struct mii_bus {
int *irq;
};
#define PHY_INTERRUPT_DISABLED 0x0
#define PHY_INTERRUPT_ENABLED 0x80000000
#define PHY_INTERRUPT_DISABLED 0x0
#define PHY_INTERRUPT_ENABLED 0x80000000
/* PHY state machine states:
*
@ -230,6 +241,8 @@ struct phy_device {
u32 dev_flags;
phy_interface_t interface;
/* Bus address of the PHY (0-32) */
int addr;
@ -345,9 +358,10 @@ 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);
const char *phy_id, u32 flags, phy_interface_t interface);
struct phy_device * phy_connect(struct net_device *dev, const char *phy_id,
void (*handler)(struct net_device *), u32 flags);
void (*handler)(struct net_device *), u32 flags,
phy_interface_t interface);
void phy_disconnect(struct phy_device *phydev);
void phy_detach(struct phy_device *phydev);
void phy_start(struct phy_device *phydev);