drivers/net/ibm_newemac/zmii.h

   1 /*
   2  * drivers/net/ibm_newemac/zmii.h
   3  *
   4  * Driver for PowerPC 4xx on-chip ethernet controller, ZMII 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  * Copyright (c) 2004, 2005 Zultys Technologies.
  12  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  13  *
  14  * Based on original work by
  15  *      Armin Kuster <akuster@mvista.com>
  16  *      Copyright 2001 MontaVista Softare Inc.
  17  *
  18  * This program is free software; you can redistribute  it and/or modify it
  19  * under  the terms of  the GNU General  Public License as published by the
  20  * Free Software Foundation;  either version 2 of the  License, or (at your
  21  * option) any later version.
  22  *
  23  */
  24 #ifndef __IBM_NEWEMAC_ZMII_H
  25 #define __IBM_NEWEMAC_ZMII_H
  26
  27 /* ZMII bridge registers */
  28 struct zmii_regs {
  29         u32 fer;                /* Function enable reg */
  30         u32 ssr;                /* Speed select reg */
  31         u32 smiirs;             /* SMII status reg */
  32 };
  33
  34 /* ZMII device */
  35 struct zmii_instance {
  36         struct zmii_regs __iomem        *base;
  37
  38         /* Only one EMAC whacks us at a time */
  39         struct mutex                    lock;
  40
  41         /* subset of PHY_MODE_XXXX */
  42         int                             mode;
  43
  44         /* number of EMACs using this ZMII bridge */
  45         int                             users;
  46
  47         /* FER value left by firmware */
  48         u32                             fer_save;
  49
  50         /* OF device instance */
  51         struct of_device                *ofdev;
  52 };
  53
  54 #ifdef CONFIG_IBM_NEW_EMAC_ZMII
  55
  56 extern int zmii_init(void);
  57 extern void zmii_exit(void);
  58 extern int zmii_attach(struct of_device *ofdev, int input, int *mode);
  59 extern void zmii_detach(struct of_device *ofdev, int input);
  60 extern void zmii_get_mdio(struct of_device *ofdev, int input);
  61 extern void zmii_put_mdio(struct of_device *ofdev, int input);
  62 extern void zmii_set_speed(struct of_device *ofdev, int input, int speed);
  63 extern int zmii_get_regs_len(struct of_device *ocpdev);
  64 extern void *zmii_dump_regs(struct of_device *ofdev, void *buf);
  65
  66 #else
  67 # define zmii_init()            0
  68 # define zmii_exit()            do { } while(0)
  69 # define zmii_attach(x,y,z)     (-ENXIO)
  70 # define zmii_detach(x,y)       do { } while(0)
  71 # define zmii_get_mdio(x,y)     do { } while(0)
  72 # define zmii_put_mdio(x,y)     do { } while(0)
  73 # define zmii_set_speed(x,y,z)  do { } while(0)
  74 # define zmii_get_regs_len(x)   0
  75 # define zmii_dump_regs(x,buf)  (buf)
  76 #endif                          /* !CONFIG_IBM_NEW_EMAC_ZMII */
  77
  78 #endif /* __IBM_NEWEMAC_ZMII_H */