FreeBSD/Linux Kernel Cross Reference
sys/dev/bhnd/cores/chipc/bhnd_sprom_chipc.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2015-2016 Landon Fuller <landon@landonf.org>
      * All rights reserved.
      *
      * 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,
     *    without modification.
     * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
     *    redistribution must be conditioned upon including a substantially
     *    similar Disclaimer requirement for further binary redistribution.
     *
     * NO WARRANTY
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
     * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
     * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     * ChipCommon SPROM driver.
     */
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/limits.h>
    #include <sys/malloc.h>
    #include <sys/module.h>
    #include <sys/systm.h>
    
    #include <dev/bhnd/bhnd.h>
    #include <dev/bhnd/nvram/bhnd_nvram.h>
    #include <dev/bhnd/nvram/bhnd_spromvar.h>
    
    #include <dev/bhnd/cores/chipc/chipc.h>
    
    #include "bhnd_nvram_if.h"
    
    #define CHIPC_VALID_SPROM_SRC(_src)     \
            ((_src) == BHND_NVRAM_SRC_SPROM || (_src) == BHND_NVRAM_SRC_OTP)
    
    static int
    chipc_sprom_probe(device_t dev)
    {
            struct chipc_caps       *caps;
            device_t                 chipc;
            int                      error;
    
            chipc = device_get_parent(dev);
            caps = BHND_CHIPC_GET_CAPS(chipc);
    
            /* Only match on SPROM/OTP devices */
            if (!CHIPC_VALID_SPROM_SRC(caps->nvram_src))
                    return (ENXIO);
    
            /* Defer to default driver implementation */
            if ((error = bhnd_sprom_probe(dev)) > 0)
                    return (error);
    
            return (BUS_PROBE_NOWILDCARD);
    }
    
    static int
    chipc_sprom_attach(device_t dev)
    {
            struct chipc_caps       *caps;
            device_t                 chipc;
            int                      error;
    
            chipc = device_get_parent(dev);
            caps = BHND_CHIPC_GET_CAPS(chipc);
    
            /* Request that ChipCommon enable access to SPROM hardware before
             * delegating attachment (and SPROM parsing) to the common driver */
            if ((error = BHND_CHIPC_ENABLE_SPROM(chipc)))
                    return (error);
    
            error = bhnd_sprom_attach(dev, caps->sprom_offset);
            BHND_CHIPC_DISABLE_SPROM(chipc);
            return (error);
    }
    
    static device_method_t chipc_sprom_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe,                 chipc_sprom_probe),
           DEVMETHOD(device_attach,                chipc_sprom_attach),
           DEVMETHOD_END
   };
   
   DEFINE_CLASS_1(bhnd_nvram, chipc_sprom_driver, chipc_sprom_methods, sizeof(struct bhnd_sprom_softc), bhnd_sprom_driver);
   DRIVER_MODULE(bhnd_chipc_sprom, bhnd_chipc, chipc_sprom_driver, NULL, NULL);
   
   MODULE_DEPEND(bhnd_chipc_sprom, bhnd, 1, 1, 1);
   MODULE_DEPEND(bhnd_chipc_sprom, bhnd_chipc, 1, 1, 1);
   MODULE_DEPEND(bhnd_chipc_sprom, bhnd_sprom, 1, 1, 1);
   MODULE_VERSION(bhnd_chipc_sprom, 1);

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