drivers/net/ibm_emac/ibm_emac_zmii.h

   1 /*
   2  * drivers/net/ibm_emac/ibm_emac_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_EMAC_ZMII_H_
  20 #define _IBM_EMAC_ZMII_H_
  21
  22 #include <linux/init.h>
  23 #include <asm/ocp.h>
  24
  25 /* ZMII bridge registers */
  26 struct zmii_regs {
  27         u32 fer;                /* Function enable reg */
  28         u32 ssr;                /* Speed select reg */
  29         u32 smiirs;             /* SMII status reg */
  30 };
  31
  32 /* ZMII device */
  33 struct ibm_ocp_zmii {
  34         struct zmii_regs __iomem *base;
  35         int mode;               /* subset of PHY_MODE_XXXX */
  36         int users;              /* number of EMACs using this ZMII bridge */
  37         u32 fer_save;           /* FER value left by firmware */
  38 };
  39
  40 #ifdef CONFIG_IBM_EMAC_ZMII
  41 int zmii_attach(void *emac) __init;
  42
  43 void __zmii_fini(struct ocp_device *ocpdev, int input) __exit;
  44 static inline void zmii_fini(struct ocp_device *ocpdev, int input)
  45 {
  46         if (ocpdev)
  47                 __zmii_fini(ocpdev, input);
  48 }
  49
  50 void __zmii_enable_mdio(struct ocp_device *ocpdev, int input);
  51 static inline void zmii_enable_mdio(struct ocp_device *ocpdev, int input)
  52 {
  53         if (ocpdev)
  54                 __zmii_enable_mdio(ocpdev, input);
  55 }
  56
  57 void __zmii_set_speed(struct ocp_device *ocpdev, int input, int speed);
  58 static inline void zmii_set_speed(struct ocp_device *ocpdev, int input,
  59                                   int speed)
  60 {
  61         if (ocpdev)
  62                 __zmii_set_speed(ocpdev, input, speed);
  63 }
  64
  65 int __zmii_get_regs_len(struct ocp_device *ocpdev);
  66 static inline int zmii_get_regs_len(struct ocp_device *ocpdev)
  67 {
  68         return ocpdev ? __zmii_get_regs_len(ocpdev) : 0;
  69 }
  70
  71 void *zmii_dump_regs(struct ocp_device *ocpdev, void *buf);
  72
  73 #else
  74 # define zmii_attach(x)         0
  75 # define zmii_fini(x,y)         ((void)0)
  76 # define zmii_enable_mdio(x,y)  ((void)0)
  77 # define zmii_set_speed(x,y,z)  ((void)0)
  78 # define zmii_get_regs_len(x)   0
  79 # define zmii_dump_regs(x,buf)  (buf)
  80 #endif                          /* !CONFIG_IBM_EMAC_ZMII */
  81
  82 #endif                          /* _IBM_EMAC_ZMII_H_ */