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

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * drivers/net/ethernet/ibm/emac/rgmii.h
   4 *
   5 * Driver for PowerPC 4xx on-chip ethernet controller, RGMII 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 * Based on ocp_zmii.h/ibm_emac_zmii.h
  13 * Armin Kuster akuster@mvista.com
  14 *
  15 * Copyright 2004 MontaVista Software, Inc.
  16 * Matt Porter <mporter@kernel.crashing.org>
  17 *
  18 * Copyright (c) 2004, 2005 Zultys Technologies.
  19 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  20 */
  21
  22#ifndef __IBM_NEWEMAC_RGMII_H
  23#define __IBM_NEWEMAC_RGMII_H
  24
  25/* RGMII bridge type */
  26#define RGMII_STANDARD          0
  27#define RGMII_AXON              1
  28
  29/* RGMII bridge */
  30struct rgmii_regs {
  31        u32 fer;                /* Function enable register */
  32        u32 ssr;                /* Speed select register */
  33};
  34
  35/* RGMII device */
  36struct rgmii_instance {
  37        struct rgmii_regs __iomem       *base;
  38
  39        /* RGMII bridge flags */
  40        int                             flags;
  41#define EMAC_RGMII_FLAG_HAS_MDIO        0x00000001
  42
  43        /* Only one EMAC whacks us at a time */
  44        struct mutex                    lock;
  45
  46        /* number of EMACs using this RGMII bridge */
  47        int                             users;
  48
  49        /* OF device instance */
  50        struct platform_device          *ofdev;
  51};
  52
  53#ifdef CONFIG_IBM_EMAC_RGMII
  54
  55int rgmii_init(void);
  56void rgmii_exit(void);
  57int rgmii_attach(struct platform_device *ofdev, int input, int mode);
  58void rgmii_detach(struct platform_device *ofdev, int input);
  59void rgmii_get_mdio(struct platform_device *ofdev, int input);
  60void rgmii_put_mdio(struct platform_device *ofdev, int input);
  61void rgmii_set_speed(struct platform_device *ofdev, int input, int speed);
  62int rgmii_get_regs_len(struct platform_device *ofdev);
  63void *rgmii_dump_regs(struct platform_device *ofdev, void *buf);
  64
  65#else
  66
  67# define rgmii_init()           0
  68# define rgmii_exit()           do { } while(0)
  69# define rgmii_attach(x,y,z)    (-ENXIO)
  70# define rgmii_detach(x,y)      do { } while(0)
  71# define rgmii_get_mdio(o,i)    do { } while (0)
  72# define rgmii_put_mdio(o,i)    do { } while (0)
  73# define rgmii_set_speed(x,y,z) do { } while(0)
  74# define rgmii_get_regs_len(x)  0
  75# define rgmii_dump_regs(x,buf) (buf)
  76#endif                          /* !CONFIG_IBM_EMAC_RGMII */
  77
  78#endif /* __IBM_NEWEMAC_RGMII_H */
  79