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/isa/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  * $FreeBSD: src/sys/isa/atkbdc_isa.c,v 1.24 2001/09/25 16:59:28 yokota Exp $
   27  */
   28 
   29 #include "opt_kbd.h"
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/kernel.h>
   34 #include <sys/bus.h>
   35 #include <sys/malloc.h>
   36 #include <machine/bus_pio.h>
   37 #include <machine/bus.h>
   38 #include <machine/resource.h>
   39 #include <sys/rman.h>
   40 
   41 #include <dev/kbd/atkbdcreg.h>
   42 
   43 #include <isa/isareg.h>
   44 #include <isa/isavar.h>
   45 
   46 static MALLOC_DEFINE(M_ATKBDDEV, "atkbddev", "AT Keyboard device");
   47 
   48 /* children */
   49 typedef struct atkbdc_device {
   50         struct resource_list resources;
   51         int rid;
   52         u_int32_t vendorid;
   53         u_int32_t serial;
   54         u_int32_t logicalid;
   55         u_int32_t compatid;
   56 } atkbdc_device_t;
   57 
   58 /* kbdc */
   59 devclass_t atkbdc_devclass;
   60 
   61 static int      atkbdc_probe(device_t dev);
   62 static int      atkbdc_attach(device_t dev);
   63 static device_t atkbdc_add_child(device_t bus, int order, char *name,
   64                                  int unit);
   65 static int      atkbdc_print_child(device_t bus, device_t dev);
   66 static int      atkbdc_read_ivar(device_t bus, device_t dev, int index,
   67                                  uintptr_t *val);
   68 static int      atkbdc_write_ivar(device_t bus, device_t dev, int index,
   69                                   uintptr_t val);
   70 static struct resource_list
   71                 *atkbdc_get_resource_list (device_t bus, device_t dev);
   72 static struct resource
   73                 *atkbdc_alloc_resource(device_t bus, device_t dev, int type,
   74                                        int *rid, u_long start, u_long end,
   75                                        u_long count, u_int flags);
   76 static int      atkbdc_release_resource(device_t bus, device_t dev, int type,
   77                                         int rid, struct resource *res);
   78 
   79 static device_method_t atkbdc_methods[] = {
   80         DEVMETHOD(device_probe,         atkbdc_probe),
   81         DEVMETHOD(device_attach,        atkbdc_attach),
   82         DEVMETHOD(device_suspend,       bus_generic_suspend),
   83         DEVMETHOD(device_resume,        bus_generic_resume),
   84 
   85         DEVMETHOD(bus_add_child,        atkbdc_add_child),
   86         DEVMETHOD(bus_print_child,      atkbdc_print_child),
   87         DEVMETHOD(bus_read_ivar,        atkbdc_read_ivar),
   88         DEVMETHOD(bus_write_ivar,       atkbdc_write_ivar),
   89         DEVMETHOD(bus_get_resource_list,atkbdc_get_resource_list),
   90         DEVMETHOD(bus_alloc_resource,   atkbdc_alloc_resource),
   91         DEVMETHOD(bus_release_resource, atkbdc_release_resource),
   92         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   93         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   94         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
   95         DEVMETHOD(bus_set_resource,     bus_generic_rl_set_resource),
   96         DEVMETHOD(bus_delete_resource,  bus_generic_rl_delete_resource),
   97         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   98         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   99 
  100         { 0, 0 }
  101 };
  102 
  103 static driver_t atkbdc_driver = {
  104         ATKBDC_DRIVER_NAME,
  105         atkbdc_methods,
  106         sizeof(atkbdc_softc_t *),
  107 };
  108 
  109 static struct isa_pnp_id atkbdc_ids[] = {
  110         { 0x0303d041, "Keyboard controller (i8042)" },  /* PNP0303 */
  111         { 0 }
  112 };
  113 
  114 static int
  115 atkbdc_probe(device_t dev)
  116 {
  117         struct resource *port0;
  118         struct resource *port1;
  119         u_long          start;
  120         u_long          count;
  121         int             error;
  122         int             rid;
  123 
  124         /* check PnP IDs */
  125         if (ISA_PNP_PROBE(device_get_parent(dev), dev, atkbdc_ids) == ENXIO)
  126                 return ENXIO;
  127 
  128         device_set_desc(dev, "Keyboard controller (i8042)");
  129 
  130         /*
  131          * Adjust I/O port resources.
  132          * The AT keyboard controller uses two ports (a command/data port
  133          * 0x60 and a status port 0x64), which may be given to us in 
  134          * one resource (0x60 through 0x64) or as two separate resources
  135          * (0x60 and 0x64). Furthermore, /boot/device.hints may contain
  136          * just one port, 0x60. We shall adjust resource settings 
  137          * so that these two ports are available as two separate resources.
  138          */
  139         device_quiet(dev);
  140         rid = 0;
  141         if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count) != 0)
  142                 return ENXIO;
  143         if (count > 1)  /* adjust the count */
  144                 bus_set_resource(dev, SYS_RES_IOPORT, rid, start, 1);
  145         port0 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1,
  146                                    RF_ACTIVE);
  147         if (port0 == NULL)
  148                 return ENXIO;
  149         rid = 1;
  150         if (bus_get_resource(dev, SYS_RES_IOPORT, rid, NULL, NULL) != 0)
  151                 bus_set_resource(dev, SYS_RES_IOPORT, 1,
  152                                  start + KBD_STATUS_PORT, 1);
  153         port1 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1,
  154                                    RF_ACTIVE);
  155         if (port1 == NULL) {
  156                 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
  157                 return ENXIO;
  158         }
  159         device_verbose(dev);
  160 
  161         error = atkbdc_probe_unit(device_get_unit(dev), port0, port1);
  162         if (error == 0)
  163                 bus_generic_probe(dev);
  164 
  165         bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
  166         bus_release_resource(dev, SYS_RES_IOPORT, 1, port1);
  167 
  168         return error;
  169 }
  170 
  171 static int
  172 atkbdc_attach(device_t dev)
  173 {
  174         atkbdc_softc_t  *sc;
  175         int             unit;
  176         int             error;
  177         int             rid;
  178 
  179         unit = device_get_unit(dev);
  180         sc = *(atkbdc_softc_t **)device_get_softc(dev);
  181         if (sc == NULL) {
  182                 /*
  183                  * We have to maintain two copies of the kbdc_softc struct,
  184                  * as the low-level console needs to have access to the
  185                  * keyboard controller before kbdc is probed and attached. 
  186                  * kbdc_soft[] contains the default entry for that purpose.
  187                  * See atkbdc.c. XXX
  188                  */
  189                 sc = atkbdc_get_softc(unit);
  190                 if (sc == NULL)
  191                         return ENOMEM;
  192         }
  193 
  194         rid = 0;
  195         sc->port0 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1,
  196                                        RF_ACTIVE);
  197         if (sc->port0 == NULL)
  198                 return ENXIO;
  199         rid = 1;
  200         sc->port1 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1,
  201                                        RF_ACTIVE);
  202         if (sc->port1 == NULL) {
  203                 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0);
  204                 return ENXIO;
  205         }
  206 
  207         error = atkbdc_attach_unit(unit, sc, sc->port0, sc->port1);
  208         if (error) {
  209                 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0);
  210                 bus_release_resource(dev, SYS_RES_IOPORT, 1, sc->port1);
  211                 return error;
  212         }
  213         *(atkbdc_softc_t **)device_get_softc(dev) = sc;
  214 
  215         bus_generic_attach(dev);
  216 
  217         return 0;
  218 }
  219 
  220 static device_t
  221 atkbdc_add_child(device_t bus, int order, char *name, int unit)
  222 {
  223         atkbdc_device_t *ivar;
  224         device_t        child;
  225         int             t;
  226 
  227         ivar = malloc(sizeof(struct atkbdc_device), M_ATKBDDEV,
  228                 M_NOWAIT | M_ZERO);
  229         if (!ivar)
  230                 return NULL;
  231 
  232         child = device_add_child_ordered(bus, order, name, unit);
  233         if (child == NULL) {
  234                 free(ivar, M_ATKBDDEV);
  235                 return child;
  236         }
  237 
  238         resource_list_init(&ivar->resources);
  239         ivar->rid = order;
  240 
  241         /*
  242          * If the device is not created by the PnP BIOS or ACPI,
  243          * refer to device hints for IRQ.
  244          */
  245         if (ISA_PNP_PROBE(device_get_parent(bus), bus, atkbdc_ids) != 0) {
  246                 if (resource_int_value(name, unit, "irq", &t) != 0)
  247                         t = -1;
  248         } else {
  249                 t = bus_get_resource_start(bus, SYS_RES_IRQ, ivar->rid);
  250         }
  251         if (t > 0)
  252                 resource_list_add(&ivar->resources, SYS_RES_IRQ, ivar->rid,
  253                                   t, t, 1);
  254 
  255         if (resource_int_value(name, unit, "flags", &t) == 0)
  256                 device_set_flags(child, t);
  257         if (resource_int_value(name, unit, "disabled", &t) == 0 && t != 0)
  258                 device_disable(child);
  259 
  260         device_set_ivars(child, ivar);
  261 
  262         return child;
  263 }
  264 
  265 static int
  266 atkbdc_print_child(device_t bus, device_t dev)
  267 {
  268         atkbdc_device_t *kbdcdev;
  269         u_long irq;
  270         int flags;
  271         int retval = 0;
  272 
  273         kbdcdev = (atkbdc_device_t *)device_get_ivars(dev);
  274 
  275         retval += bus_print_child_header(bus, dev);
  276         flags = device_get_flags(dev);
  277         if (flags != 0)
  278                 retval += printf(" flags 0x%x", flags);
  279         irq = bus_get_resource_start(dev, SYS_RES_IRQ, kbdcdev->rid);
  280         if (irq != 0)
  281                 retval += printf(" irq %ld", irq);
  282         retval += bus_print_child_footer(bus, dev);
  283 
  284         return (retval);
  285 }
  286 
  287 static int
  288 atkbdc_read_ivar(device_t bus, device_t dev, int index, uintptr_t *val)
  289 {
  290         atkbdc_device_t *ivar;
  291 
  292         ivar = (atkbdc_device_t *)device_get_ivars(dev);
  293         switch (index) {
  294         case KBDC_IVAR_VENDORID:
  295                 *val = (u_long)ivar->vendorid;
  296                 break;
  297         case KBDC_IVAR_SERIAL:
  298                 *val = (u_long)ivar->serial;
  299                 break;
  300         case KBDC_IVAR_LOGICALID:
  301                 *val = (u_long)ivar->logicalid;
  302                 break;
  303         case KBDC_IVAR_COMPATID:
  304                 *val = (u_long)ivar->compatid;
  305                 break;
  306         default:
  307                 return ENOENT;
  308         }
  309         return 0;
  310 }
  311 
  312 static int
  313 atkbdc_write_ivar(device_t bus, device_t dev, int index, uintptr_t val)
  314 {
  315         atkbdc_device_t *ivar;
  316 
  317         ivar = (atkbdc_device_t *)device_get_ivars(dev);
  318         switch (index) {
  319         case KBDC_IVAR_VENDORID:
  320                 ivar->vendorid = (u_int32_t)val;
  321                 break;
  322         case KBDC_IVAR_SERIAL:
  323                 ivar->serial = (u_int32_t)val;
  324                 break;
  325         case KBDC_IVAR_LOGICALID:
  326                 ivar->logicalid = (u_int32_t)val;
  327                 break;
  328         case KBDC_IVAR_COMPATID:
  329                 ivar->compatid = (u_int32_t)val;
  330                 break;
  331         default:
  332                 return ENOENT;
  333         }
  334         return 0;
  335 }
  336 
  337 static struct resource_list
  338 *atkbdc_get_resource_list (device_t bus, device_t dev)
  339 {
  340         atkbdc_device_t *ivar;
  341 
  342         ivar = (atkbdc_device_t *)device_get_ivars(dev);
  343         return &ivar->resources;
  344 }
  345 
  346 static struct resource
  347 *atkbdc_alloc_resource(device_t bus, device_t dev, int type, int *rid,
  348                        u_long start, u_long end, u_long count, u_int flags)
  349 {
  350         atkbdc_device_t *ivar;
  351 
  352         ivar = (atkbdc_device_t *)device_get_ivars(dev);
  353         return resource_list_alloc(&ivar->resources, bus, dev, type, rid,
  354                                    start, end, count, flags);
  355 }
  356 
  357 static int
  358 atkbdc_release_resource(device_t bus, device_t dev, int type, int rid,
  359                         struct resource *res)
  360 {
  361         atkbdc_device_t *ivar;
  362 
  363         ivar = (atkbdc_device_t *)device_get_ivars(dev);
  364         return resource_list_release(&ivar->resources, bus, dev, type, rid,
  365                                      res);
  366 }
  367 
  368 DRIVER_MODULE(atkbdc, isa, atkbdc_driver, atkbdc_devclass, 0, 0);
  369 DRIVER_MODULE(atkbdc, acpi, atkbdc_driver, atkbdc_devclass, 0, 0);

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