Device tree aware EMAC driver
Based on BenH's earlier work, this is a new version of the EMAC driver
for the built-in ethernet found on PowerPC 4xx embedded CPUs. The
same ASIC is also found in the Axon bridge chip. This new version is
designed to work in the arch/powerpc tree, using the device tree to
probe the device, rather than the old and ugly arch/ppc OCP layer.
This driver is designed to sit alongside the old driver (that lies in
drivers/net/ibm_emac and this one in drivers/net/ibm_newemac). The
old driver is left in place to support arch/ppc until arch/ppc itself
reaches its final demise (not too long now, with luck).
This driver still has a number of things that could do with cleaning
up, but I think they can be fixed up after merging. Specifically:
- Should be adjusted to properly use the dma mapping API.
Axon needs this.
- Probe logic needs reworking, in conjuction with the general
probing code for of_platform devices. The dependencies here between
EMAC, MAL, ZMII etc. make this complicated. At present, it usually
works, because we initialize and register the sub-drivers before the
EMAC driver itself, and (being in driver code) runs after the devices
themselves have been instantiated from the device tree.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-08-23 03:56:01 +00:00
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/*
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* drivers/net/ibm_newemac/phy.h
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*
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* Driver for PowerPC 4xx on-chip ethernet controller, PHY support
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*
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2007-12-05 00:14:33 +00:00
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* Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
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* <benh@kernel.crashing.org>
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*
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* Based on the arch/ppc version of the driver:
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*
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Device tree aware EMAC driver
Based on BenH's earlier work, this is a new version of the EMAC driver
for the built-in ethernet found on PowerPC 4xx embedded CPUs. The
same ASIC is also found in the Axon bridge chip. This new version is
designed to work in the arch/powerpc tree, using the device tree to
probe the device, rather than the old and ugly arch/ppc OCP layer.
This driver is designed to sit alongside the old driver (that lies in
drivers/net/ibm_emac and this one in drivers/net/ibm_newemac). The
old driver is left in place to support arch/ppc until arch/ppc itself
reaches its final demise (not too long now, with luck).
This driver still has a number of things that could do with cleaning
up, but I think they can be fixed up after merging. Specifically:
- Should be adjusted to properly use the dma mapping API.
Axon needs this.
- Probe logic needs reworking, in conjuction with the general
probing code for of_platform devices. The dependencies here between
EMAC, MAL, ZMII etc. make this complicated. At present, it usually
works, because we initialize and register the sub-drivers before the
EMAC driver itself, and (being in driver code) runs after the devices
themselves have been instantiated from the device tree.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-08-23 03:56:01 +00:00
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* Benjamin Herrenschmidt <benh@kernel.crashing.org>
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* February 2003
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*
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* Minor additions by Eugene Surovegin <ebs@ebshome.net>, 2004
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This file basically duplicates sungem_phy.{c,h} with different PHYs
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* supported. I'm looking into merging that in a single mii layer more
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* flexible than mii.c
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*/
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#ifndef __IBM_NEWEMAC_PHY_H
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#define __IBM_NEWEMAC_PHY_H
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struct mii_phy;
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/* Operations supported by any kind of PHY */
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struct mii_phy_ops {
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int (*init) (struct mii_phy * phy);
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int (*suspend) (struct mii_phy * phy, int wol_options);
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int (*setup_aneg) (struct mii_phy * phy, u32 advertise);
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int (*setup_forced) (struct mii_phy * phy, int speed, int fd);
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int (*poll_link) (struct mii_phy * phy);
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int (*read_link) (struct mii_phy * phy);
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};
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/* Structure used to statically define an mii/gii based PHY */
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struct mii_phy_def {
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u32 phy_id; /* Concatenated ID1 << 16 | ID2 */
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u32 phy_id_mask; /* Significant bits */
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u32 features; /* Ethtool SUPPORTED_* defines or
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0 for autodetect */
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int magic_aneg; /* Autoneg does all speed test for us */
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const char *name;
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const struct mii_phy_ops *ops;
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};
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/* An instance of a PHY, partially borrowed from mii_if_info */
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struct mii_phy {
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struct mii_phy_def *def;
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u32 advertising; /* Ethtool ADVERTISED_* defines */
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u32 features; /* Copied from mii_phy_def.features
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or determined automaticaly */
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int address; /* PHY address */
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int mode; /* PHY mode */
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/* 1: autoneg enabled, 0: disabled */
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int autoneg;
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/* forced speed & duplex (no autoneg)
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* partner speed & duplex & pause (autoneg)
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*/
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int speed;
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int duplex;
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int pause;
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int asym_pause;
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/* Provided by host chip */
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struct net_device *dev;
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int (*mdio_read) (struct net_device * dev, int addr, int reg);
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void (*mdio_write) (struct net_device * dev, int addr, int reg,
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int val);
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};
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/* Pass in a struct mii_phy with dev, mdio_read and mdio_write
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* filled, the remaining fields will be filled on return
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*/
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int emac_mii_phy_probe(struct mii_phy *phy, int address);
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int emac_mii_reset_phy(struct mii_phy *phy);
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#endif /* __IBM_NEWEMAC_PHY_H */
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