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  * Copyright (c) 2009 Neelkanth Natu
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/param.h>
   28 #include <sys/kernel.h>
   29 #include <sys/systm.h>
   30 #include <sys/module.h>
   31 #include <sys/bus.h>
   32 #include <sys/rman.h>
   33 #include <sys/lock.h>
   34 #include <sys/mutex.h>
   35 #include <sys/sema.h>
   36 #include <sys/taskqueue.h>
   37 
   38 #include <machine/bus.h>
   39 
   40 #include <vm/uma.h>
   41 
   42 #include <sys/ata.h>
   43 #include <dev/ata/ata-all.h>
   44 
   45 #include <machine/resource.h>
   46 
   47 __FBSDID("$FreeBSD: stable/8/sys/mips/sibyte/ata_zbbus.c 195333 2009-07-04 03:05:48Z imp $");
   48 
   49 static int
   50 ata_zbbus_probe(device_t dev)
   51 {
   52 
   53         return (ata_probe(dev));
   54 }
   55 
   56 static int
   57 ata_zbbus_attach(device_t dev)
   58 {
   59         int i, rid, regshift, regoffset;
   60         struct ata_channel *ch;
   61         struct resource *io;
   62         
   63         ch = device_get_softc(dev);
   64 
   65         if (ch->attached)
   66                 return (0);
   67         ch->attached = 1;
   68 
   69         rid = 0;
   70         io = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1, RF_ACTIVE);
   71         if (io == NULL)
   72                 return (ENXIO);
   73 
   74         /*
   75          * SWARM needs an address shift of 5 when accessing ATA registers.
   76          *
   77          * For e.g. an access to register 4 actually needs an address
   78          * of (4 << 5) to be output on the generic bus.
   79          */
   80         regshift = 5;
   81         resource_int_value(device_get_name(dev), device_get_unit(dev),
   82                            "regshift", &regshift);
   83         if (regshift && bootverbose)
   84                 device_printf(dev, "using a register shift of %d\n", regshift);
   85 
   86         regoffset = 0x1F0;
   87         resource_int_value(device_get_name(dev), device_get_unit(dev),
   88                            "regoffset", &regoffset);
   89         if (regoffset && bootverbose) {
   90                 device_printf(dev, "using a register offset of 0x%0x\n",
   91                               regoffset);
   92         }
   93 
   94         /* setup the ata register addresses */
   95         for (i = ATA_DATA; i <= ATA_COMMAND; ++i) {
   96                 ch->r_io[i].res = io;
   97                 ch->r_io[i].offset = (regoffset + i) << regshift;
   98         }
   99 
  100         ch->r_io[ATA_CONTROL].res = io;
  101         ch->r_io[ATA_CONTROL].offset = (regoffset + ATA_CTLOFFSET) << regshift;
  102         ch->r_io[ATA_IDX_ADDR].res = io;        /* XXX what is this used for */
  103         ata_default_registers(dev);
  104 
  105         /* initialize softc for this channel */
  106         ch->unit = 0;
  107         ch->flags |= ATA_USE_16BIT;
  108         ata_generic_hw(dev);
  109 
  110         return (ata_attach(dev));
  111 }
  112 
  113 static int
  114 ata_zbbus_detach(device_t dev)
  115 {
  116         int error;
  117         struct ata_channel *ch = device_get_softc(dev);
  118 
  119         if (!ch->attached)
  120                 return (0);
  121         ch->attached = 0;
  122 
  123         error = ata_detach(dev);
  124 
  125         bus_release_resource(dev, SYS_RES_MEMORY, 0,
  126                              ch->r_io[ATA_IDX_ADDR].res);
  127 
  128         return (error);
  129 }
  130 
  131 static int
  132 ata_zbbus_suspend(device_t dev)
  133 {
  134         struct ata_channel *ch = device_get_softc(dev);
  135 
  136         if (!ch->attached)
  137                 return (0);
  138 
  139         return (ata_suspend(dev));
  140 }
  141 
  142 static int
  143 ata_zbbus_resume(device_t dev)
  144 {
  145         struct ata_channel *ch = device_get_softc(dev);
  146 
  147         if (!ch->attached)
  148                 return (0);
  149 
  150         return (ata_resume(dev));
  151 }
  152 
  153 static device_method_t ata_zbbus_methods[] = {
  154         /* device interface */
  155         DEVMETHOD(device_probe,         ata_zbbus_probe),
  156         DEVMETHOD(device_attach,        ata_zbbus_attach),
  157         DEVMETHOD(device_detach,        ata_zbbus_detach),
  158         DEVMETHOD(device_suspend,       ata_zbbus_suspend),
  159         DEVMETHOD(device_resume,        ata_zbbus_resume),
  160 
  161         { 0, 0 }
  162 };
  163 
  164 static driver_t ata_zbbus_driver = {
  165         "ata",
  166         ata_zbbus_methods,
  167         sizeof(struct ata_channel)
  168 };
  169 
  170 DRIVER_MODULE(ata, zbbus, ata_zbbus_driver, ata_devclass, 0, 0);

Cache object: 22c9d47b8cc64cd04d3ebdbfd2f0066a


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