FreeBSD/Linux Kernel Cross Reference
sys/dev/altera/dwc/if_dwc_socfpga.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause
      *
      * Copyright (c) 2019 Ruslan Bukin <br@bsdpad.com>
      *
      * This software was developed by SRI International and the University of
      * Cambridge Computer Laboratory (Department of Computer Science and
      * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
      * DARPA SSITH research programme.
     *
     * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    
    #include <machine/bus.h>
    
    #include <dev/dwc/if_dwc.h>
    #include <dev/dwc/if_dwcvar.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include "if_dwc_if.h"
    
    static int
    if_dwc_socfpga_probe(device_t dev)
    {
    
            if (!ofw_bus_status_okay(dev))
                    return (ENXIO);
    
            if (!ofw_bus_is_compatible(dev, "altr,socfpga-stmmac"))
                    return (ENXIO);
    
            device_set_desc(dev, "Altera SOCFPGA Ethernet MAC");
    
            return (BUS_PROBE_DEFAULT);
    }
    
    static int
    if_dwc_socfpga_init(device_t dev)
    {
    
            return (0);
    }
    
    static int
    if_dwc_socfpga_mac_type(device_t dev)
    {
    
            return (DWC_GMAC_EXT_DESC);
    }
    
    static int
    if_dwc_socfpga_mii_clk(device_t dev)
    {
            phandle_t root;
    
            root = OF_finddevice("/");
    
            if (ofw_bus_node_is_compatible(root, "altr,socfpga-stratix10"))
                    return (GMAC_MII_CLK_35_60M_DIV26);
    
            /* Default value. */
            return (GMAC_MII_CLK_25_35M_DIV16);
    }
    
    static device_method_t dwc_socfpga_methods[] = {
            DEVMETHOD(device_probe,         if_dwc_socfpga_probe),
    
            DEVMETHOD(if_dwc_init,          if_dwc_socfpga_init),
            DEVMETHOD(if_dwc_mac_type,      if_dwc_socfpga_mac_type),
            DEVMETHOD(if_dwc_mii_clk,       if_dwc_socfpga_mii_clk),
   
           DEVMETHOD_END
   };
   
   extern driver_t dwc_driver;
   
   DEFINE_CLASS_1(dwc, dwc_socfpga_driver, dwc_socfpga_methods,
       sizeof(struct dwc_softc), dwc_driver);
   EARLY_DRIVER_MODULE(dwc_socfpga, simplebus, dwc_socfpga_driver, 0, 0,
       BUS_PASS_SUPPORTDEV + BUS_PASS_ORDER_MIDDLE);
   
   MODULE_DEPEND(dwc_socfpga, dwc, 1, 1, 1);

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