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/dev/atkbdc/atkbdc_isa.c

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    1 /*-
    2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    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 as
   10  *    the first lines of this file unmodified.
   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  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/8.1/sys/dev/atkbdc/atkbdc_isa.c 188160 2009-02-05 18:38:39Z imp $");
   29 
   30 #include "opt_kbd.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/bus.h>
   37 #include <sys/malloc.h>
   38 #include <machine/resource.h>
   39 #include <sys/rman.h>
   40 #include <machine/bus.h>
   41 
   42 #include <dev/atkbdc/atkbdc_subr.h>
   43 #include <dev/atkbdc/atkbdcreg.h>
   44 
   45 #include <isa/isareg.h>
   46 #include <isa/isavar.h>
   47 
   48 static int      atkbdc_isa_probe(device_t dev);
   49 static int      atkbdc_isa_attach(device_t dev);
   50 static device_t atkbdc_isa_add_child(device_t bus, int order, const char *name,
   51                     int unit);
   52 
   53 static device_method_t atkbdc_isa_methods[] = {
   54         DEVMETHOD(device_probe,         atkbdc_isa_probe),
   55         DEVMETHOD(device_attach,        atkbdc_isa_attach),
   56         DEVMETHOD(device_suspend,       bus_generic_suspend),
   57         DEVMETHOD(device_resume,        bus_generic_resume),
   58 
   59         DEVMETHOD(bus_add_child,        atkbdc_isa_add_child),
   60         DEVMETHOD(bus_print_child,      atkbdc_print_child),
   61         DEVMETHOD(bus_read_ivar,        atkbdc_read_ivar),
   62         DEVMETHOD(bus_write_ivar,       atkbdc_write_ivar),
   63         DEVMETHOD(bus_get_resource_list,atkbdc_get_resource_list),
   64         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
   65         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
   66         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   67         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   68         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
   69         DEVMETHOD(bus_set_resource,     bus_generic_rl_set_resource),
   70         DEVMETHOD(bus_delete_resource,  bus_generic_rl_delete_resource),
   71         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   72         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   73 
   74         { 0, 0 }
   75 };
   76 
   77 static driver_t atkbdc_isa_driver = {
   78         ATKBDC_DRIVER_NAME,
   79         atkbdc_isa_methods,
   80         sizeof(atkbdc_softc_t *),
   81 };
   82 
   83 static struct isa_pnp_id atkbdc_ids[] = {
   84         { 0x0303d041, "Keyboard controller (i8042)" },  /* PNP0303 */
   85         { 0 }
   86 };
   87 
   88 static int
   89 atkbdc_isa_probe(device_t dev)
   90 {
   91         struct resource *port0;
   92         struct resource *port1;
   93         u_long          start;
   94         u_long          count;
   95         int             error;
   96         int             rid;
   97 #if defined(__i386__)
   98         bus_space_tag_t tag;
   99         bus_space_handle_t ioh1;
  100         volatile int    i;
  101         register_t      flags;
  102 #endif
  103 
  104         /* check PnP IDs */
  105         if (ISA_PNP_PROBE(device_get_parent(dev), dev, atkbdc_ids) == ENXIO)
  106                 return ENXIO;
  107 
  108         device_set_desc(dev, "Keyboard controller (i8042)");
  109 
  110         /*
  111          * Adjust I/O port resources.
  112          * The AT keyboard controller uses two ports (a command/data port
  113          * 0x60 and a status port 0x64), which may be given to us in 
  114          * one resource (0x60 through 0x64) or as two separate resources
  115          * (0x60 and 0x64). Some brain-damaged ACPI BIOS has reversed
  116          * command/data port and status port. Furthermore, /boot/device.hints
  117          * may contain just one port, 0x60. We shall adjust resource settings
  118          * so that these two ports are available as two separate resources
  119          * in correct order.
  120          */
  121         device_quiet(dev);
  122         rid = 0;
  123         if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count) != 0)
  124                 return ENXIO;
  125         if (start == IO_KBD + KBD_STATUS_PORT) {
  126                 start = IO_KBD;
  127                 count++;
  128         }
  129         if (count > 1)  /* adjust the count and/or start port */
  130                 bus_set_resource(dev, SYS_RES_IOPORT, rid, start, 1);
  131         port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
  132         if (port0 == NULL)
  133                 return ENXIO;
  134         rid = 1;
  135         if (bus_get_resource(dev, SYS_RES_IOPORT, rid, NULL, NULL) != 0)
  136                 bus_set_resource(dev, SYS_RES_IOPORT, 1,
  137                                  start + KBD_STATUS_PORT, 1);
  138         port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
  139         if (port1 == NULL) {
  140                 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
  141                 return ENXIO;
  142         }
  143 
  144 #if defined(__i386__)
  145         /*
  146          * Check if we really have AT keyboard controller. Poll status
  147          * register until we get "all clear" indication. If no such
  148          * indication comes, it probably means that there is no AT
  149          * keyboard controller present. Give up in such case. Check relies
  150          * on the fact that reading from non-existing in/out port returns
  151          * 0xff on i386. May or may not be true on other platforms.
  152          */
  153         tag = rman_get_bustag(port0);
  154         ioh1 = rman_get_bushandle(port1);
  155         flags = intr_disable();
  156         for (i = 0; i != 65535; i++) {
  157                 if ((bus_space_read_1(tag, ioh1, 0) & 0x2) == 0)
  158                         break;
  159         }
  160         intr_restore(flags);
  161         if (i == 65535) {
  162                 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
  163                 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1);
  164                 return ENXIO;
  165         }
  166 #endif
  167 
  168         device_verbose(dev);
  169 
  170         error = atkbdc_probe_unit(device_get_unit(dev), port0, port1);
  171         if (error == 0)
  172                 bus_generic_probe(dev);
  173 
  174         bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
  175         bus_release_resource(dev, SYS_RES_IOPORT, 1, port1);
  176 
  177         return error;
  178 }
  179 
  180 static int
  181 atkbdc_isa_attach(device_t dev)
  182 {
  183         atkbdc_softc_t  *sc;
  184         int             unit;
  185         int             error;
  186         int             rid;
  187 
  188         unit = device_get_unit(dev);
  189         sc = *(atkbdc_softc_t **)device_get_softc(dev);
  190         if (sc == NULL) {
  191                 /*
  192                  * We have to maintain two copies of the kbdc_softc struct,
  193                  * as the low-level console needs to have access to the
  194                  * keyboard controller before kbdc is probed and attached.
  195                  * kbdc_soft[] contains the default entry for that purpose.
  196                  * See atkbdc.c. XXX
  197                  */
  198                 sc = atkbdc_get_softc(unit);
  199                 if (sc == NULL)
  200                         return ENOMEM;
  201         }
  202 
  203         rid = 0;
  204         sc->port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
  205                                            RF_ACTIVE);
  206         if (sc->port0 == NULL)
  207                 return ENXIO;
  208         rid = 1;
  209         sc->port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
  210                                            RF_ACTIVE);
  211         if (sc->port1 == NULL) {
  212                 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0);
  213                 return ENXIO;
  214         }
  215 
  216         error = atkbdc_attach_unit(unit, sc, sc->port0, sc->port1);
  217         if (error) {
  218                 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0);
  219                 bus_release_resource(dev, SYS_RES_IOPORT, 1, sc->port1);
  220                 return error;
  221         }
  222         *(atkbdc_softc_t **)device_get_softc(dev) = sc;
  223 
  224         bus_generic_attach(dev);
  225 
  226         return 0;
  227 }
  228 
  229 static device_t
  230 atkbdc_isa_add_child(device_t bus, int order, const char *name, int unit)
  231 {
  232         atkbdc_device_t *ivar;
  233         device_t        child;
  234         int             t;
  235 
  236         ivar = malloc(sizeof(struct atkbdc_device), M_ATKBDDEV,
  237                 M_NOWAIT | M_ZERO);
  238         if (!ivar)
  239                 return NULL;
  240 
  241         child = device_add_child_ordered(bus, order, name, unit);
  242         if (child == NULL) {
  243                 free(ivar, M_ATKBDDEV);
  244                 return child;
  245         }
  246 
  247         resource_list_init(&ivar->resources);
  248         ivar->rid = order;
  249 
  250         /*
  251          * If the device is not created by the PnP BIOS or ACPI,
  252          * refer to device hints for IRQ.
  253          */
  254         if (ISA_PNP_PROBE(device_get_parent(bus), bus, atkbdc_ids) != 0) {
  255                 if (resource_int_value(name, unit, "irq", &t) != 0)
  256                         t = -1;
  257         } else {
  258                 t = bus_get_resource_start(bus, SYS_RES_IRQ, ivar->rid);
  259         }
  260         if (t > 0)
  261                 resource_list_add(&ivar->resources, SYS_RES_IRQ, ivar->rid,
  262                                   t, t, 1);
  263 
  264         if (resource_disabled(name, unit))
  265                 device_disable(child);
  266 
  267         device_set_ivars(child, ivar);
  268 
  269         return child;
  270 }
  271 
  272 DRIVER_MODULE(atkbdc, isa, atkbdc_isa_driver, atkbdc_devclass, 0, 0);
  273 DRIVER_MODULE(atkbdc, acpi, atkbdc_isa_driver, atkbdc_devclass, 0, 0);

Cache object: 2294c377c7bb4cdd906f1499bfe9f319


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