ata_iobus.c

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

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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