ata_iobus.c

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    1 /*-
    2  * Copyright 2002 by Peter Grehan. All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  * 3. The name of the author may not be used to endorse or promote products
   13  *    derived from this software without specific prior written permission.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/10.1/sys/powerpc/psim/ata_iobus.c 249213 2013-04-06 19:12:49Z marius $");
   30 
   31 /*
   32  * PSIM local bus ATA controller
   33  */
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/module.h>
   38 #include <sys/bus.h>
   39 #include <sys/malloc.h>
   40 #include <sys/sema.h>
   41 #include <sys/taskqueue.h>
   42 #include <machine/stdarg.h>
   43 #include <vm/uma.h>
   44 #include <machine/resource.h>
   45 #include <machine/bus.h>
   46 #include <sys/rman.h>
   47 #include <sys/ata.h>
   48 #include <dev/ata/ata-all.h>
   49 #include <ata_if.h>
   50 
   51 #include <dev/ofw/openfirm.h>
   52 #include <powerpc/psim/iobusvar.h>
   53 
   54 /*
   55  * Define the iobus ata bus attachment. This creates a pseudo-bus that
   56  * the ATA device can be attached to
   57  */
   58 static  int  ata_iobus_attach(device_t dev);
   59 static  int  ata_iobus_probe(device_t dev);
   60 static  int  ata_iobus_print_child(device_t dev, device_t child);
   61 struct resource *ata_iobus_alloc_resource(device_t, device_t, int, int *,
   62                                           u_long, u_long, u_long, u_int);
   63 static int ata_iobus_release_resource(device_t, device_t, int, int,
   64                                       struct resource *);
   65 
   66 static device_method_t ata_iobus_methods[] = {
   67         /* Device interface */
   68         DEVMETHOD(device_probe,         ata_iobus_probe),
   69         DEVMETHOD(device_attach,        ata_iobus_attach),
   70         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   71         DEVMETHOD(device_suspend,       bus_generic_suspend),
   72         DEVMETHOD(device_resume,        bus_generic_resume),
   73 
   74         /* Bus methods */
   75         DEVMETHOD(bus_print_child,          ata_iobus_print_child),
   76         DEVMETHOD(bus_alloc_resource,       ata_iobus_alloc_resource),
   77         DEVMETHOD(bus_release_resource,     ata_iobus_release_resource),
   78         DEVMETHOD(bus_activate_resource,    bus_generic_activate_resource),
   79         DEVMETHOD(bus_deactivate_resource,  bus_generic_deactivate_resource),
   80         DEVMETHOD(bus_setup_intr,           bus_generic_setup_intr),
   81         DEVMETHOD(bus_teardown_intr,        bus_generic_teardown_intr),
   82 
   83         DEVMETHOD_END
   84 };
   85 
   86 static driver_t ata_iobus_driver = {
   87         "ataiobus",
   88         ata_iobus_methods,
   89         0,
   90 };
   91 
   92 static devclass_t ata_iobus_devclass;
   93 
   94 DRIVER_MODULE(ataiobus, iobus, ata_iobus_driver, ata_iobus_devclass, NULL,
   95     NULL);
   96 MODULE_DEPEND(ata, ata, 1, 1, 1);
   97 
   98 static int
   99 ata_iobus_probe(device_t dev)
  100 {
  101         char *type = iobus_get_name(dev);
  102 
  103         if (strncmp(type, "ata", 3) != 0)
  104                 return (ENXIO);
  105 
  106         device_set_desc(dev, "PSIM ATA Controller");
  107         return (0);
  108 }
  109 
  110 
  111 static int
  112 ata_iobus_attach(device_t dev)
  113 {
  114         /*
  115          * Add a single child per controller. Should be able
  116          * to add two
  117          */
  118         device_add_child(dev, "ata", -1);
  119         return (bus_generic_attach(dev));
  120 }
  121 
  122 
  123 static int
  124 ata_iobus_print_child(device_t dev, device_t child)
  125 {
  126         int retval = 0;
  127 
  128         retval += bus_print_child_header(dev, child);
  129         /* irq ? */
  130         retval += bus_print_child_footer(dev, child);
  131 
  132         return (retval);
  133 }
  134 
  135 
  136 struct resource *
  137 ata_iobus_alloc_resource(device_t dev, device_t child, int type, int *rid,
  138                          u_long start, u_long end, u_long count, u_int flags)
  139 {
  140         struct resource *res = NULL;
  141         int myrid;
  142         u_int *ofw_regs;
  143 
  144         ofw_regs = iobus_get_regs(dev);
  145 
  146         /*
  147          * The reg array for the PSIM ata device has 6 start/size entries:
  148          *  0 - unused
  149          *  1/2/3 - unused
  150          *  4/5/6 - primary command
  151          *  7/8/9 - secondary command
  152          *  10/11/12 - primary control
  153          *  13/14/15 - secondary control
  154          *  16/17/18 - primary/secondary dma registers, unimplemented
  155          *
  156          *  The resource values are calculated from these registers
  157          */
  158         if (type == SYS_RES_IOPORT) {
  159                 switch (*rid) {
  160                 case ATA_IOADDR_RID:
  161                         myrid = 0;
  162                         start = ofw_regs[4];
  163                         end = start + ATA_IOSIZE - 1;
  164                         count = ATA_IOSIZE;
  165                         res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
  166                                                  SYS_RES_MEMORY, &myrid,
  167                                                  start, end, count, flags);
  168                         break;
  169 
  170                 case ATA_CTLADDR_RID:
  171                         myrid = 0;
  172                         start = ofw_regs[10];
  173                         end = start + ATA_CTLIOSIZE - 1;
  174                         count = ATA_CTLIOSIZE;
  175                         res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
  176                                                  SYS_RES_MEMORY, &myrid,
  177                                                  start, end, count, flags);
  178                         break;
  179 
  180                 case ATA_BMADDR_RID:
  181                         /* DMA not properly supported by psim */
  182                         break;
  183                 }
  184                 return (res);
  185 
  186         } else if (type == SYS_RES_IRQ && *rid == ATA_IRQ_RID) {
  187                 /*
  188                  * Pass this on to the parent
  189                  */
  190                 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
  191                                            SYS_RES_IRQ, rid, 0, ~0, 1, flags));
  192 
  193         } else {
  194                 return (NULL);
  195         }
  196 }
  197 
  198 
  199 static int
  200 ata_iobus_release_resource(device_t dev, device_t child, int type, int rid,
  201                            struct resource *r)
  202 {
  203         /* no hotplug... */
  204         return (0);
  205 }
  206 
  207 
  208 /*
  209  * Define the actual ATA device. This is a sub-bus to the ata-iobus layer
  210  * to allow the higher layer bus to massage the resource allocation.
  211  */
  212 
  213 static  int  ata_iobus_sub_probe(device_t dev);
  214 static  int  ata_iobus_sub_setmode(device_t dev, int target, int mode);
  215 
  216 static device_method_t ata_iobus_sub_methods[] = {
  217         /* Device interface */
  218         DEVMETHOD(device_probe,     ata_iobus_sub_probe),
  219         DEVMETHOD(device_attach,    ata_attach),
  220         DEVMETHOD(device_detach,    ata_detach),
  221         DEVMETHOD(device_resume,    ata_resume),
  222 
  223         /* ATA interface */
  224         DEVMETHOD(ata_setmode,      ata_iobus_sub_setmode),
  225         DEVMETHOD_END
  226 };
  227 
  228 static driver_t ata_iobus_sub_driver = {
  229         "ata",
  230         ata_iobus_sub_methods,
  231         sizeof(struct ata_channel),
  232 };
  233 
  234 DRIVER_MODULE(ata, ataiobus, ata_iobus_sub_driver, ata_devclass, NULL, NULL);
  235 
  236 static int
  237 ata_iobus_sub_probe(device_t dev)
  238 {
  239         struct ata_channel *ch = device_get_softc(dev);
  240 
  241         /* Only a single unit per controller thus far */
  242         ch->unit = 0;
  243         ch->flags = (ATA_USE_16BIT|ATA_NO_SLAVE);
  244         ata_generic_hw(dev);
  245 
  246         return ata_probe(dev);
  247 }
  248 
  249 static int
  250 ata_iobus_sub_setmode(device_t parent, int target, int mode)
  251 {
  252         /* Only ever PIO mode here... */
  253         return (ATA_PIO);
  254 }

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FreeBSD/Linux Kernel Cross Reference sys/powerpc/psim/ata_iobus.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/psim/ata_iobus.c