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

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>

5 files changed, 64 insertions, 13 deletions

diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index 7db3c8a..f0b6879 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -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);
diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index cb39587..889d3a1 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -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;
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 6bf18c8..baa3514 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -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);
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 9e81a50..39e9e32 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -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
 
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 2a08b2b..b01fc70 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -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)