drivers/net/ethernet/ibm/emac/rgmii.h

   1 /*
   2  * drivers/net/ethernet/ibm/emac/rgmii.h
   3  *
   4  * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
   5  *
   6  * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
   7  *                <benh@kernel.crashing.org>
   8  *
   9  * Based on the arch/ppc version of the driver:
  10  *
  11  * Based on ocp_zmii.h/ibm_emac_zmii.h
  12  * Armin Kuster akuster@mvista.com
  13  *
  14  * Copyright 2004 MontaVista Software, Inc.
  15  * Matt Porter <mporter@kernel.crashing.org>
  16  *
  17  * Copyright (c) 2004, 2005 Zultys Technologies.
  18  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  19  *
  20  * This program is free software; you can redistribute  it and/or modify it
  21  * under  the terms of  the GNU General  Public License as published by the
  22  * Free Software Foundation;  either version 2 of the  License, or (at your
  23  * option) any later version.
  24  */
  25
  26 #ifndef __IBM_NEWEMAC_RGMII_H
  27 #define __IBM_NEWEMAC_RGMII_H
  28
  29 /* RGMII bridge type */
  30 #define RGMII_STANDARD          0
  31 #define RGMII_AXON              1
  32
  33 /* RGMII bridge */
  34 struct rgmii_regs {
  35         u32 fer;                /* Function enable register */
  36         u32 ssr;                /* Speed select register */
  37 };
  38
  39 /* RGMII device */
  40 struct rgmii_instance {
  41         struct rgmii_regs __iomem       *base;
  42
  43         /* RGMII bridge flags */
  44         int                             flags;
  45 #define EMAC_RGMII_FLAG_HAS_MDIO        0x00000001
  46
  47         /* Only one EMAC whacks us at a time */
  48         struct mutex                    lock;
  49
  50         /* number of EMACs using this RGMII bridge */
  51         int                             users;
  52
  53         /* OF device instance */
  54         struct platform_device          *ofdev;
  55 };
  56
  57 #ifdef CONFIG_IBM_EMAC_RGMII
  58
  59 int rgmii_init(void);
  60 void rgmii_exit(void);
  61 int rgmii_attach(struct platform_device *ofdev, int input, int mode);
  62 void rgmii_detach(struct platform_device *ofdev, int input);
  63 void rgmii_get_mdio(struct platform_device *ofdev, int input);
  64 void rgmii_put_mdio(struct platform_device *ofdev, int input);
  65 void rgmii_set_speed(struct platform_device *ofdev, int input, int speed);
  66 int rgmii_get_regs_len(struct platform_device *ofdev);
  67 void *rgmii_dump_regs(struct platform_device *ofdev, void *buf);
  68
  69 #else
  70
  71 # define rgmii_init()           0
  72 # define rgmii_exit()           do { } while(0)
  73 # define rgmii_attach(x,y,z)    (-ENXIO)
  74 # define rgmii_detach(x,y)      do { } while(0)
  75 # define rgmii_get_mdio(o,i)    do { } while (0)
  76 # define rgmii_put_mdio(o,i)    do { } while (0)
  77 # define rgmii_set_speed(x,y,z) do { } while(0)
  78 # define rgmii_get_regs_len(x)  0
  79 # define rgmii_dump_regs(x,buf) (buf)
  80 #endif                          /* !CONFIG_IBM_EMAC_RGMII */
  81
  82 #endif /* __IBM_NEWEMAC_RGMII_H */