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>
18 years ago
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/*
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* drivers/net/ibm_newemac/debug.h
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*
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* Driver for PowerPC 4xx on-chip ethernet controller, debug print routines.
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*
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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>
18 years ago
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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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*/
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#ifndef __IBM_NEWEMAC_DEBUG_H
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#define __IBM_NEWEMAC_DEBUG_H
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#include <linux/init.h>
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#include "core.h"
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#if defined(CONFIG_IBM_NEW_EMAC_DEBUG)
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struct emac_instance;
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struct mal_instance;
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extern void emac_dbg_register(struct emac_instance *dev);
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extern void emac_dbg_unregister(struct emac_instance *dev);
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extern void mal_dbg_register(struct mal_instance *mal);
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extern void mal_dbg_unregister(struct mal_instance *mal);
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extern int emac_init_debug(void) __init;
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extern void emac_fini_debug(void) __exit;
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extern void emac_dbg_dump_all(void);
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# define DBG_LEVEL 1
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#else
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# define emac_dbg_register(x) do { } while(0)
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# define emac_dbg_unregister(x) do { } while(0)
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# define mal_dbg_register(x) do { } while(0)
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# define mal_dbg_unregister(x) do { } while(0)
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# define emac_init_debug() do { } while(0)
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# define emac_fini_debug() do { } while(0)
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# define emac_dbg_dump_all() do { } while(0)
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# define DBG_LEVEL 0
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#endif
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#define EMAC_DBG(dev, name, fmt, arg...) \
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printk(KERN_DEBUG #name "%s: " fmt, dev->ofdev->node->full_name, ## arg)
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#if DBG_LEVEL > 0
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# define DBG(d,f,x...) EMAC_DBG(d, emac, f, ##x)
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# define MAL_DBG(d,f,x...) EMAC_DBG(d, mal, f, ##x)
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# define ZMII_DBG(d,f,x...) EMAC_DBG(d, zmii, f, ##x)
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# define RGMII_DBG(d,f,x...) EMAC_DBG(d, rgmii, f, ##x)
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# define NL "\n"
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#else
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# define DBG(f,x...) ((void)0)
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# define MAL_DBG(d,f,x...) ((void)0)
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# define ZMII_DBG(d,f,x...) ((void)0)
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# define RGMII_DBG(d,f,x...) ((void)0)
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#endif
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#if DBG_LEVEL > 1
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# define DBG2(d,f,x...) DBG(d,f, ##x)
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# define MAL_DBG2(d,f,x...) MAL_DBG(d,f, ##x)
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# define ZMII_DBG2(d,f,x...) ZMII_DBG(d,f, ##x)
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# define RGMII_DBG2(d,f,x...) RGMII_DBG(d,f, ##x)
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#else
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# define DBG2(f,x...) ((void)0)
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# define MAL_DBG2(d,f,x...) ((void)0)
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# define ZMII_DBG2(d,f,x...) ((void)0)
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# define RGMII_DBG2(d,f,x...) ((void)0)
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#endif
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#endif /* __IBM_NEWEMAC_DEBUG_H */
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