text: /*
   * drivers/net/ethernet/ibm/emac/rgmii.h
   *
   * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
   *
   * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
   *                <benh@kernel.crashing.org>
   *
   * Based on the arch/ppc version of the driver:
   *
   * 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;
  
  	/* RGMII bridge flags */
  	int				flags;
  #define EMAC_RGMII_FLAG_HAS_MDIO	0x00000001
  
  	/* Only one EMAC whacks us at a time */
  	struct mutex			lock;
  
  	/* number of EMACs using this RGMII bridge */
  	int				users;
  
  	/* OF device instance */
  	struct platform_device		*ofdev;
  };
  
  #ifdef CONFIG_IBM_EMAC_RGMII
  
  extern int rgmii_init(void);
  extern void rgmii_exit(void);
  extern int rgmii_attach(struct platform_device *ofdev, int input, int mode);
  extern void rgmii_detach(struct platform_device *ofdev, int input);
  extern void rgmii_get_mdio(struct platform_device *ofdev, int input);
  extern void rgmii_put_mdio(struct platform_device *ofdev, int input);
  extern void rgmii_set_speed(struct platform_device *ofdev, int input, int speed);
  extern int rgmii_get_regs_len(struct platform_device *ofdev);
  extern void *rgmii_dump_regs(struct platform_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_EMAC_RGMII */
  
  #endif /* __IBM_NEWEMAC_RGMII_H */
  