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 11:56:01 +08:00
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/*
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* drivers/net/ibm_newemac/rgmii.h
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*
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* Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
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*
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* Based on ocp_zmii.h/ibm_emac_zmii.h
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* Armin Kuster akuster@mvista.com
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*
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* Copyright 2004 MontaVista Software, Inc.
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* Matt Porter <mporter@kernel.crashing.org>
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*
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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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* 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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#ifndef __IBM_NEWEMAC_RGMII_H
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#define __IBM_NEWEMAC_RGMII_H
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/* RGMII bridge type */
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#define RGMII_STANDARD 0
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#define RGMII_AXON 1
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/* RGMII bridge */
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struct rgmii_regs {
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u32 fer; /* Function enable register */
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u32 ssr; /* Speed select register */
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};
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/* RGMII device */
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struct rgmii_instance {
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struct rgmii_regs __iomem *base;
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2007-12-05 08:14:28 +08:00
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/* RGMII bridge flags */
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int flags;
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#define EMAC_RGMII_FLAG_HAS_MDIO 0x00000001
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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 11:56:01 +08:00
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/* Only one EMAC whacks us at a time */
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struct mutex lock;
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/* number of EMACs using this RGMII bridge */
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int users;
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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_RGMII
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extern int rgmii_init(void);
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extern void rgmii_exit(void);
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extern int rgmii_attach(struct of_device *ofdev, int input, int mode);
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extern void rgmii_detach(struct of_device *ofdev, int input);
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extern void rgmii_get_mdio(struct of_device *ofdev, int input);
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extern void rgmii_put_mdio(struct of_device *ofdev, int input);
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extern void rgmii_set_speed(struct of_device *ofdev, int input, int speed);
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extern int rgmii_get_regs_len(struct of_device *ofdev);
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extern void *rgmii_dump_regs(struct of_device *ofdev, void *buf);
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#else
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# define rgmii_init() 0
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# define rgmii_exit() do { } while(0)
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# define rgmii_attach(x,y,z) (-ENXIO)
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# define rgmii_detach(x,y) do { } while(0)
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# define rgmii_get_mdio(o,i) do { } while (0)
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# define rgmii_put_mdio(o,i) do { } while (0)
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# define rgmii_set_speed(x,y,z) do { } while(0)
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# define rgmii_get_regs_len(x) 0
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# define rgmii_dump_regs(x,buf) (buf)
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#endif /* !CONFIG_IBM_NEW_EMAC_RGMII */
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#endif /* __IBM_NEWEMAC_RGMII_H */
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