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 */
  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 platform_device          *ofdev;
  47 };
  48
  49 #ifdef CONFIG_IBM_EMAC_ZMII
  50
  51 int zmii_init(void);
  52 void zmii_exit(void);
  53 int zmii_attach(struct platform_device *ofdev, int input,
  54                 phy_interface_t *mode);
  55 void zmii_detach(struct platform_device *ofdev, int input);
  56 void zmii_get_mdio(struct platform_device *ofdev, int input);
  57 void zmii_put_mdio(struct platform_device *ofdev, int input);
  58 void zmii_set_speed(struct platform_device *ofdev, int input, int speed);
  59 int zmii_get_regs_len(struct platform_device *ocpdev);
  60 void *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 */