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 (c) 2004, 2005 Zultys Technologies.
   7  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
   8  *
   9  * Based on original work by
  10  *      Armin Kuster <akuster@mvista.com>
  11  *      Copyright 2001 MontaVista Softare Inc.
  12  *
  13  * This program is free software; you can redistribute  it and/or modify it
  14  * under  the terms of  the GNU General  Public License as published by the
  15  * Free Software Foundation;  either version 2 of the  License, or (at your
  16  * option) any later version.
  17  *
  18  */
  19 #ifndef __IBM_NEWEMAC_ZMII_H
  20 #define __IBM_NEWEMAC_ZMII_H
  21
  22 /* ZMII bridge registers */
  23 struct zmii_regs {
  24         u32 fer;                /* Function enable reg */
  25         u32 ssr;                /* Speed select reg */
  26         u32 smiirs;             /* SMII status reg */
  27 };
  28
  29 /* ZMII device */
  30 struct zmii_instance {
  31         struct zmii_regs __iomem        *base;
  32
  33         /* Only one EMAC whacks us at a time */
  34         struct mutex                    lock;
  35
  36         /* subset of PHY_MODE_XXXX */
  37         int                             mode;
  38
  39         /* number of EMACs using this ZMII bridge */
  40         int                             users;
  41
  42         /* FER value left by firmware */
  43         u32                             fer_save;
  44
  45         /* OF device instance */
  46         struct of_device                *ofdev;
  47 };
  48
  49 #ifdef CONFIG_IBM_NEW_EMAC_ZMII
  50
  51 extern int zmii_init(void);
  52 extern void zmii_exit(void);
  53 extern int zmii_attach(struct of_device *ofdev, int input, int *mode);
  54 extern void zmii_detach(struct of_device *ofdev, int input);
  55 extern void zmii_get_mdio(struct of_device *ofdev, int input);
  56 extern void zmii_put_mdio(struct of_device *ofdev, int input);
  57 extern void zmii_set_speed(struct of_device *ofdev, int input, int speed);
  58 extern int zmii_get_regs_len(struct of_device *ocpdev);
  59 extern void *zmii_dump_regs(struct of_device *ofdev, void *buf);
  60
  61 #else
  62 # define zmii_init()            0
  63 # define zmii_exit()            do { } while(0)
  64 # define zmii_attach(x,y,z)     (-ENXIO)
  65 # define zmii_detach(x,y)       do { } while(0)
  66 # define zmii_get_mdio(x,y)     do { } while(0)
  67 # define zmii_put_mdio(x,y)     do { } while(0)
  68 # define zmii_set_speed(x,y,z)  do { } while(0)
  69 # define zmii_get_regs_len(x)   0
  70 # define zmii_dump_regs(x,buf)  (buf)
  71 #endif                          /* !CONFIG_IBM_NEW_EMAC_ZMII */
  72
  73 #endif /* __IBM_NEWEMAC_ZMII_H */