FreeBSD/Linux Kernel Cross Reference
sys/dev/enetc/enetc_mdio.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2021 Alstom Group.
      * Copyright (c) 2021 Semihalf.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #ifndef _ENETC_MDIO_H_
    #define _ENETC_MDIO_H_
    
    /* MDIO registers */
    #define ENETC_MDIO_CFG          0x0     /* MDIO configuration and status */
    #define MDIO_CFG_CLKDIV(x)      ((((x) >> 1) & 0xff) << 8)
    
    #define ENETC_MDIO_CTL          0x4     /* MDIO control */
    #define MDIO_CTL_DEV_ADDR(x)    ((x) & 0x1f)
    #define MDIO_CTL_PORT_ADDR(x)   (((x) & 0x1f) << 5)
    
    #define ENETC_MDIO_DATA         0x8     /* MDIO data */
    #define MDIO_DATA(x)            ((x) & 0xffff)
    
    #define ENETC_MDIO_ADDR         0xc     /* MDIO address */
    
    #define MDIO_CFG_BSY            BIT(0)
    #define MDIO_CFG_RD_ER          BIT(1)
    #define MDIO_CFG_ENC45          BIT(6)
    #define MDIO_CFG_NEG            BIT(23)
    #define MDIO_CTL_READ           BIT(15)
    #define MII_ADDR_C45            BIT(30)
    
    /* MDIO configuration and helpers */
    #define ENETC_MDC_DIV           258
    #define ENETC_TIMEOUT           1000
    
    int enetc_mdio_write(struct resource*, int, int, int, int);
    int enetc_mdio_read(struct resource*, int, int, int);
    
    #endif

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