drivers/net/ibm_emac/ibm_emac_rgmii.h

   1 /*
   2  * drivers/net/ibm_emac/ibm_emac_rgmii.c
   3  *
   4  * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
   5  *
   6  * Based on ocp_zmii.h/ibm_emac_zmii.h
   7  * Armin Kuster akuster@mvista.com
   8  *
   9  * Copyright 2004 MontaVista Software, Inc.
  10  * Matt Porter <mporter@kernel.crashing.org>
  11  *
  12  * Copyright (c) 2004, 2005 Zultys Technologies.
  13  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  14  *
  15  * This program is free software; you can redistribute  it and/or modify it
  16  * under  the terms of  the GNU General  Public License as published by the
  17  * Free Software Foundation;  either version 2 of the  License, or (at your
  18  * option) any later version.
  19  */
  20
  21 #ifndef _IBM_EMAC_RGMII_H_
  22 #define _IBM_EMAC_RGMII_H_
  23
  24 #include <linux/config.h>
  25
  26 /* RGMII bridge */
  27 struct rgmii_regs {
  28         u32 fer;                /* Function enable register */
  29         u32 ssr;                /* Speed select register */
  30 };
  31
  32 /* RGMII device */
  33 struct ibm_ocp_rgmii {
  34         struct rgmii_regs __iomem *base;
  35         int users;              /* number of EMACs using this RGMII bridge */
  36 };
  37
  38 #ifdef CONFIG_IBM_EMAC_RGMII
  39 int rgmii_attach(void *emac) __init;
  40
  41 void __rgmii_fini(struct ocp_device *ocpdev, int input) __exit;
  42 static inline void rgmii_fini(struct ocp_device *ocpdev, int input)
  43 {
  44         if (ocpdev)
  45                 __rgmii_fini(ocpdev, input);
  46 }
  47
  48 void rgmii_set_speed(struct ocp_device *ocpdev, int input, int speed);
  49
  50 int __rgmii_get_regs_len(struct ocp_device *ocpdev);
  51 static inline int rgmii_get_regs_len(struct ocp_device *ocpdev)
  52 {
  53         return ocpdev ? __rgmii_get_regs_len(ocpdev) : 0;
  54 }
  55
  56 void *rgmii_dump_regs(struct ocp_device *ocpdev, void *buf);
  57 #else
  58 # define rgmii_attach(x)        0
  59 # define rgmii_fini(x,y)        ((void)0)
  60 # define rgmii_set_speed(x,y,z) ((void)0)
  61 # define rgmii_get_regs_len(x)  0
  62 # define rgmii_dump_regs(x,buf) (buf)
  63 #endif                          /* !CONFIG_IBM_EMAC_RGMII */
  64
  65 #endif                          /* _IBM_EMAC_RGMII_H_ */