LXR linux/drivers/net/ethernet/ibm/emac/zmii.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * drivers/net/ethernet/ibm/emac/zmii.h
   4 *
   5 * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support.
   6 *
   7 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
   8 *                <benh@kernel.crashing.org>
   9 *
  10 * Based on the arch/ppc version of the driver:
  11 *
  12 * Copyright (c) 2004, 2005 Zultys Technologies.
  13 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  14 *
  15 * Based on original work by
  16 *      Armin Kuster <akuster@mvista.com>
  17 *      Copyright 2001 MontaVista Softare Inc.
  18 */
  19#ifndef __IBM_NEWEMAC_ZMII_H
  20#define __IBM_NEWEMAC_ZMII_H
  21
  22/* ZMII bridge registers */
  23struct 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 */
  30struct 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 platform_device          *ofdev;
  47};
  48
  49#ifdef CONFIG_IBM_EMAC_ZMII
  50
  51int zmii_init(void);
  52void zmii_exit(void);
  53int zmii_attach(struct platform_device *ofdev, int input,
  54                phy_interface_t *mode);
  55void zmii_detach(struct platform_device *ofdev, int input);
  56void zmii_get_mdio(struct platform_device *ofdev, int input);
  57void zmii_put_mdio(struct platform_device *ofdev, int input);
  58void zmii_set_speed(struct platform_device *ofdev, int input, int speed);
  59int zmii_get_regs_len(struct platform_device *ocpdev);
  60void *zmii_dump_regs(struct platform_device *ofdev, void *buf);
  61
  62#else
  63# define zmii_init()            0
  64# define zmii_exit()            do { } while(0)
  65# define zmii_attach(x,y,z)     (-ENXIO)
  66# define zmii_detach(x,y)       do { } while(0)
  67# define zmii_get_mdio(x,y)     do { } while(0)
  68# define zmii_put_mdio(x,y)     do { } while(0)
  69# define zmii_set_speed(x,y,z)  do { } while(0)
  70# define zmii_get_regs_len(x)   0
  71# define zmii_dump_regs(x,buf)  (buf)
  72#endif                          /* !CONFIG_IBM_EMAC_ZMII */
  73
  74#endif /* __IBM_NEWEMAC_ZMII_H */
  75