Create PHY Lib for U-Boot

Extends the mii_dev structure to participate in a full-blown MDIO and
PHY driver scheme.  The mii_dev structure and miiphy calls are modified
in such a way to allow the original mii command and miiphy
infrastructure to work as before, but also to support a new set of APIs
which allow (among other things) sharing of PHY driver code and 10G support

The mii command will continue to support normal PHY management functions
(Clause 22 of 802.3), but will not be changed to support 10G
(Clause 45).

The basic design is similar to PHY Lib from Linux, but simplified for
U-Boot's network and driver infrastructure.

We now have MDIO drivers and PHY drivers

An MDIO driver provides:
read
write
reset

A PHY driver provides:
(optionally): probe
config - initial setup, starting of auto-negotiation
startup - waiting for AN, and reading link state
shutdown - any cleanup needed

The ethernet drivers interact with the PHY Lib using these functions:
phy_connect()
phy_config()
phy_startup()
phy_shutdown()

Each PHY driver can be configured separately, or all at once using
config_phylib_all_drivers.h (added in the patch which adds the drivers)

We also provide generic drivers for Clause 22 (10/100/1000), and
Clause 45 (10G) PHYs.

We also implement phy_reset(), and call it in phy_connect(). Because
phy_reset() is essentially the same as miiphy_reset, but:
a) must support 10G PHYs, and
b) should use the phylib primitives,

we implement miiphy_reset, using phy_reset(), but only when
CONFIG_PHYLIB is set. Otherwise, we just use the old version. In this
way, we save on compile size, even if we don't manage to save code size.

Pulled ethtool.h and mdio.h from:
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
782d640afd15af7a1faf01cfe566ca4ac511319d
With many, many deletions so as to enable compilation under u-boot

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Detlev Zundel <dzu@denx.de>

1 files changed, 219 insertions, 0 deletions

diff --git a/include/phy.h b/include/phy.h
new file mode 100644
index 0000000..2abd23b
--- /dev/null
+++ b/include/phy.h
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ *	Andy Fleming <afleming@freescale.com>
+ *
+ * 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 Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * This file pretty much stolen from Linux's mii.h/ethtool.h/phy.h
+ */
+
+#ifndef _PHY_H
+#define _PHY_H
+
+#include <linux/list.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/mdio.h>
+
+#define PHY_MAX_ADDR 32
+
+#define PHY_BASIC_FEATURES	(SUPPORTED_10baseT_Half | \
+				 SUPPORTED_10baseT_Full | \
+				 SUPPORTED_100baseT_Half | \
+				 SUPPORTED_100baseT_Full | \
+				 SUPPORTED_Autoneg | \
+				 SUPPORTED_TP | \
+				 SUPPORTED_MII)
+
+#define PHY_GBIT_FEATURES	(PHY_BASIC_FEATURES | \
+				 SUPPORTED_1000baseT_Half | \
+				 SUPPORTED_1000baseT_Full)
+
+#define PHY_10G_FEATURES	(PHY_GBIT_FEATURES | \
+				SUPPORTED_10000baseT_Full)
+
+#define PHY_ANEG_TIMEOUT	4000
+
+
+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_RGMII_ID,
+	PHY_INTERFACE_MODE_RGMII_RXID,
+	PHY_INTERFACE_MODE_RGMII_TXID,
+	PHY_INTERFACE_MODE_RTBI,
+	PHY_INTERFACE_MODE_XGMII,
+	PHY_INTERFACE_MODE_NONE	/* Must be last */
+} phy_interface_t;
+
+static const char *phy_interface_strings[] = {
+	[PHY_INTERFACE_MODE_MII]		= "mii",
+	[PHY_INTERFACE_MODE_GMII]		= "gmii",
+	[PHY_INTERFACE_MODE_SGMII]		= "sgmii",
+	[PHY_INTERFACE_MODE_TBI]		= "tbi",
+	[PHY_INTERFACE_MODE_RMII]		= "rmii",
+	[PHY_INTERFACE_MODE_RGMII]		= "rgmii",
+	[PHY_INTERFACE_MODE_RGMII_ID]		= "rgmii-id",
+	[PHY_INTERFACE_MODE_RGMII_RXID]		= "rgmii-rxid",
+	[PHY_INTERFACE_MODE_RGMII_TXID]		= "rgmii-txid",
+	[PHY_INTERFACE_MODE_RTBI]		= "rtbi",
+	[PHY_INTERFACE_MODE_XGMII]		= "xgmii",
+	[PHY_INTERFACE_MODE_NONE]		= "",
+};
+
+static inline const char *phy_string_for_interface(phy_interface_t i)
+{
+	/* Default to unknown */
+	if (i > PHY_INTERFACE_MODE_NONE)
+		i = PHY_INTERFACE_MODE_NONE;
+
+	return phy_interface_strings[i];
+}
+
+
+struct phy_device;
+
+#define MDIO_NAME_LEN 32
+
+struct mii_dev {
+	struct list_head link;
+	char name[MDIO_NAME_LEN];
+	void *priv;
+	int (*read)(struct mii_dev *bus, int addr, int devad, int reg);
+	int (*write)(struct mii_dev *bus, int addr, int devad, int reg,
+			u16 val);
+	int (*reset)(struct mii_dev *bus);
+	struct phy_device *phymap[PHY_MAX_ADDR];
+	u32 phy_mask;
+};
+
+/* struct phy_driver: a structure which defines PHY behavior
+ *
+ * uid will contain a number which represents the PHY.  During
+ * startup, the driver will poll the PHY to find out what its
+ * UID--as defined by registers 2 and 3--is.  The 32-bit result
+ * gotten from the PHY will be masked to
+ * discard any bits which may change based on revision numbers
+ * unimportant to functionality
+ *
+ */
+struct phy_driver {
+	char *name;
+	unsigned int uid;
+	unsigned int mask;
+	unsigned int mmds;
+
+	u32 features;
+
+	/* Called to do any driver startup necessities */
+	/* Will be called during phy_connect */
+	int (*probe)(struct phy_device *phydev);
+
+	/* Called to configure the PHY, and modify the controller
+	 * based on the results.  Should be called after phy_connect */
+	int (*config)(struct phy_device *phydev);
+
+	/* Called when starting up the controller */
+	int (*startup)(struct phy_device *phydev);
+
+	/* Called when bringing down the controller */
+	int (*shutdown)(struct phy_device *phydev);
+
+	struct list_head list;
+};
+
+struct phy_device {
+	/* Information about the PHY type */
+	/* And management functions */
+	struct mii_dev *bus;
+	struct phy_driver *drv;
+	void *priv;
+
+	struct eth_device *dev;
+
+	/* forced speed & duplex (no autoneg)
+	 * partner speed & duplex & pause (autoneg)
+	 */
+	int speed;
+	int duplex;
+
+	/* The most recently read link state */
+	int link;
+	int port;
+	phy_interface_t interface;
+
+	u32 advertising;
+	u32 supported;
+	u32 mmds;
+
+	int autoneg;
+	int addr;
+	int pause;
+	int asym_pause;
+	u32 phy_id;
+	u32 flags;
+};
+
+static inline int phy_read(struct phy_device *phydev, int devad, int regnum)
+{
+	struct mii_dev *bus = phydev->bus;
+
+	return bus->read(bus, phydev->addr, devad, regnum);
+}
+
+static inline int phy_write(struct phy_device *phydev, int devad, int regnum,
+			u16 val)
+{
+	struct mii_dev *bus = phydev->bus;
+
+	return bus->write(bus, phydev->addr, devad, regnum, val);
+}
+
+#ifdef CONFIG_PHYLIB_10G
+extern struct phy_driver gen10g_driver;
+
+/* For now, XGMII is the only 10G interface */
+static inline int is_10g_interface(phy_interface_t interface)
+{
+	return interface == PHY_INTERFACE_MODE_XGMII;
+}
+
+#endif
+
+int phy_init(void);
+int phy_reset(struct phy_device *phydev);
+struct phy_device *phy_connect(struct mii_dev *bus, int addr,
+				struct eth_device *dev,
+				phy_interface_t interface);
+int phy_startup(struct phy_device *phydev);
+int phy_config(struct phy_device *phydev);
+int phy_shutdown(struct phy_device *phydev);
+int phy_register(struct phy_driver *drv);
+int genphy_config_aneg(struct phy_device *phydev);
+int genphy_update_link(struct phy_device *phydev);
+int genphy_config(struct phy_device *phydev);
+int genphy_startup(struct phy_device *phydev);
+int genphy_shutdown(struct phy_device *phydev);
+int gen10g_config(struct phy_device *phydev);
+int gen10g_startup(struct phy_device *phydev);
+int gen10g_shutdown(struct phy_device *phydev);
+int gen10g_discover_mmds(struct phy_device *phydev);
+
+#endif