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 07:56:01 +04:00
/*
* drivers / net / ibm_newemac / rgmii . h
*
* Driver for PowerPC 4 xx on - chip ethernet controller , RGMII bridge support .
*
2007-12-05 03:14:33 +03:00
* Copyright 2007 Benjamin Herrenschmidt , IBM Corp .
* < benh @ kernel . crashing . org >
*
* Based on the arch / ppc version of the driver :
*
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 07:56:01 +04:00
* Based on ocp_zmii . h / ibm_emac_zmii . h
* Armin Kuster akuster @ mvista . com
*
* Copyright 2004 MontaVista Software , Inc .
* Matt Porter < mporter @ kernel . crashing . org >
*
* Copyright ( c ) 2004 , 2005 Zultys Technologies .
* Eugene Surovegin < eugene . surovegin @ zultys . com > or < ebs @ ebshome . net >
*
* 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 .
*/
# ifndef __IBM_NEWEMAC_RGMII_H
# define __IBM_NEWEMAC_RGMII_H
/* RGMII bridge type */
# define RGMII_STANDARD 0
# define RGMII_AXON 1
/* RGMII bridge */
struct rgmii_regs {
u32 fer ; /* Function enable register */
u32 ssr ; /* Speed select register */
} ;
/* RGMII device */
struct rgmii_instance {
struct rgmii_regs __iomem * base ;
2007-12-05 03:14:28 +03:00
/* RGMII bridge flags */
int flags ;
# define EMAC_RGMII_FLAG_HAS_MDIO 0x00000001
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 07:56:01 +04:00
/* Only one EMAC whacks us at a time */
struct mutex lock ;
/* number of EMACs using this RGMII bridge */
int users ;
/* OF device instance */
struct of_device * ofdev ;
} ;
# ifdef CONFIG_IBM_NEW_EMAC_RGMII
extern int rgmii_init ( void ) ;
extern void rgmii_exit ( void ) ;
extern int rgmii_attach ( struct of_device * ofdev , int input , int mode ) ;
extern void rgmii_detach ( struct of_device * ofdev , int input ) ;
extern void rgmii_get_mdio ( struct of_device * ofdev , int input ) ;
extern void rgmii_put_mdio ( struct of_device * ofdev , int input ) ;
extern void rgmii_set_speed ( struct of_device * ofdev , int input , int speed ) ;
extern int rgmii_get_regs_len ( struct of_device * ofdev ) ;
extern void * rgmii_dump_regs ( struct of_device * ofdev , void * buf ) ;
# else
# define rgmii_init() 0
# define rgmii_exit() do { } while(0)
# define rgmii_attach(x,y,z) (-ENXIO)
# define rgmii_detach(x,y) do { } while(0)
# define rgmii_get_mdio(o,i) do { } while (0)
# define rgmii_put_mdio(o,i) do { } while (0)
# define rgmii_set_speed(x,y,z) do { } while(0)
# define rgmii_get_regs_len(x) 0
# define rgmii_dump_regs(x,buf) (buf)
# endif /* !CONFIG_IBM_NEW_EMAC_RGMII */
# endif /* __IBM_NEWEMAC_RGMII_H */
