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/zmii.h
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*
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* Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge 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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* Copyright (c) 2004, 2005 Zultys Technologies.
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* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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*
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* Based on original work by
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* Armin Kuster <akuster@mvista.com>
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* Copyright 2001 MontaVista Softare Inc.
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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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*/
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#ifndef __IBM_NEWEMAC_ZMII_H
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#define __IBM_NEWEMAC_ZMII_H
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/* ZMII bridge registers */
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struct zmii_regs {
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u32 fer; /* Function enable reg */
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u32 ssr; /* Speed select reg */
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u32 smiirs; /* SMII status reg */
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};
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/* ZMII device */
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struct zmii_instance {
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struct zmii_regs __iomem *base;
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/* Only one EMAC whacks us at a time */
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struct mutex lock;
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/* subset of PHY_MODE_XXXX */
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int mode;
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/* number of EMACs using this ZMII bridge */
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int users;
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/* FER value left by firmware */
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u32 fer_save;
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/* OF device instance */
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struct of_device *ofdev;
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};
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#ifdef CONFIG_IBM_NEW_EMAC_ZMII
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extern int zmii_init(void);
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extern void zmii_exit(void);
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extern int zmii_attach(struct of_device *ofdev, int input, int *mode);
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extern void zmii_detach(struct of_device *ofdev, int input);
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extern void zmii_get_mdio(struct of_device *ofdev, int input);
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extern void zmii_put_mdio(struct of_device *ofdev, int input);
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extern void zmii_set_speed(struct of_device *ofdev, int input, int speed);
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extern int zmii_get_regs_len(struct of_device *ocpdev);
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extern void *zmii_dump_regs(struct of_device *ofdev, void *buf);
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#else
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# define zmii_init() 0
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# define zmii_exit() do { } while(0)
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# define zmii_attach(x,y,z) (-ENXIO)
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# define zmii_detach(x,y) do { } while(0)
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# define zmii_get_mdio(x,y) do { } while(0)
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# define zmii_put_mdio(x,y) do { } while(0)
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# define zmii_set_speed(x,y,z) do { } while(0)
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# define zmii_get_regs_len(x) 0
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# define zmii_dump_regs(x,buf) (buf)
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#endif /* !CONFIG_IBM_NEW_EMAC_ZMII */
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#endif /* __IBM_NEWEMAC_ZMII_H */
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