The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/sibyte/ata_zbbus.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2009 Neelkanth Natu
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/param.h>
   30 #include <sys/kernel.h>
   31 #include <sys/systm.h>
   32 #include <sys/module.h>
   33 #include <sys/bus.h>
   34 #include <sys/rman.h>
   35 #include <sys/lock.h>
   36 #include <sys/mutex.h>
   37 #include <sys/sema.h>
   38 #include <sys/taskqueue.h>
   39 
   40 #include <machine/bus.h>
   41 
   42 #include <vm/uma.h>
   43 
   44 #include <sys/ata.h>
   45 #include <dev/ata/ata-all.h>
   46 
   47 #include <machine/resource.h>
   48 
   49 __FBSDID("$FreeBSD: stable/12/sys/mips/sibyte/ata_zbbus.c 326259 2017-11-27 15:07:26Z pfg $");
   50 
   51 static int
   52 ata_zbbus_probe(device_t dev)
   53 {
   54 
   55         return (ata_probe(dev));
   56 }
   57 
   58 static int
   59 ata_zbbus_attach(device_t dev)
   60 {
   61         int i, rid, regshift, regoffset;
   62         struct ata_channel *ch;
   63         struct resource *io;
   64         
   65         ch = device_get_softc(dev);
   66 
   67         if (ch->attached)
   68                 return (0);
   69         ch->attached = 1;
   70 
   71         rid = 0;
   72         io = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
   73         if (io == NULL)
   74                 return (ENXIO);
   75 
   76         /*
   77          * SWARM needs an address shift of 5 when accessing ATA registers.
   78          *
   79          * For e.g. an access to register 4 actually needs an address
   80          * of (4 << 5) to be output on the generic bus.
   81          */
   82         regshift = 5;
   83         resource_int_value(device_get_name(dev), device_get_unit(dev),
   84                            "regshift", &regshift);
   85         if (regshift && bootverbose)
   86                 device_printf(dev, "using a register shift of %d\n", regshift);
   87 
   88         regoffset = 0x1F0;
   89         resource_int_value(device_get_name(dev), device_get_unit(dev),
   90                            "regoffset", &regoffset);
   91         if (regoffset && bootverbose) {
   92                 device_printf(dev, "using a register offset of 0x%0x\n",
   93                               regoffset);
   94         }
   95 
   96         /* setup the ata register addresses */
   97         for (i = ATA_DATA; i <= ATA_COMMAND; ++i) {
   98                 ch->r_io[i].res = io;
   99                 ch->r_io[i].offset = (regoffset + i) << regshift;
  100         }
  101 
  102         ch->r_io[ATA_CONTROL].res = io;
  103         ch->r_io[ATA_CONTROL].offset = (regoffset + ATA_CTLOFFSET) << regshift;
  104         ch->r_io[ATA_IDX_ADDR].res = io;        /* XXX what is this used for */
  105         ata_default_registers(dev);
  106 
  107         /* initialize softc for this channel */
  108         ch->unit = 0;
  109         ch->flags |= ATA_USE_16BIT;
  110         ata_generic_hw(dev);
  111 
  112         return (ata_attach(dev));
  113 }
  114 
  115 static int
  116 ata_zbbus_detach(device_t dev)
  117 {
  118         int error;
  119         struct ata_channel *ch = device_get_softc(dev);
  120 
  121         if (!ch->attached)
  122                 return (0);
  123         ch->attached = 0;
  124 
  125         error = ata_detach(dev);
  126 
  127         bus_release_resource(dev, SYS_RES_MEMORY, 0,
  128                              ch->r_io[ATA_IDX_ADDR].res);
  129 
  130         return (error);
  131 }
  132 
  133 static int
  134 ata_zbbus_suspend(device_t dev)
  135 {
  136         struct ata_channel *ch = device_get_softc(dev);
  137 
  138         if (!ch->attached)
  139                 return (0);
  140 
  141         return (ata_suspend(dev));
  142 }
  143 
  144 static int
  145 ata_zbbus_resume(device_t dev)
  146 {
  147         struct ata_channel *ch = device_get_softc(dev);
  148 
  149         if (!ch->attached)
  150                 return (0);
  151 
  152         return (ata_resume(dev));
  153 }
  154 
  155 static device_method_t ata_zbbus_methods[] = {
  156         /* device interface */
  157         DEVMETHOD(device_probe,         ata_zbbus_probe),
  158         DEVMETHOD(device_attach,        ata_zbbus_attach),
  159         DEVMETHOD(device_detach,        ata_zbbus_detach),
  160         DEVMETHOD(device_suspend,       ata_zbbus_suspend),
  161         DEVMETHOD(device_resume,        ata_zbbus_resume),
  162 
  163         { 0, 0 }
  164 };
  165 
  166 static driver_t ata_zbbus_driver = {
  167         "ata",
  168         ata_zbbus_methods,
  169         sizeof(struct ata_channel)
  170 };
  171 
  172 DRIVER_MODULE(ata, zbbus, ata_zbbus_driver, ata_devclass, 0, 0);

Cache object: 401eee576579e30c76b8362f2aacff6f


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