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/sound/isa/gusc.c

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    1 /*-
    2  * Copyright (c) 1999 Seigo Tanimura
    3  * Copyright (c) 1999 Ville-Pertti Keinonen
    4  * 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  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, 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/param.h>
   29 #include <sys/systm.h>
   30 #include <sys/kernel.h>
   31 #include <sys/bus.h>
   32 #include <sys/malloc.h>
   33 #include <sys/module.h>
   34 #include <machine/resource.h>
   35 #include <machine/bus.h>
   36 #include <sys/rman.h>
   37 
   38 #ifdef HAVE_KERNEL_OPTION_HEADERS
   39 #include "opt_snd.h"
   40 #endif
   41 
   42 #include <dev/sound/pcm/sound.h>
   43 #include <dev/sound/chip.h>
   44 #include "bus_if.h"
   45 
   46 #include <isa/isavar.h>
   47 #include <isa/isa_common.h>
   48 
   49 SND_DECLARE_FILE("$FreeBSD: releng/11.1/sys/dev/sound/isa/gusc.c 298307 2016-04-19 23:37:24Z pfg $");
   50 
   51 #define LOGICALID_NOPNP 0
   52 #define LOGICALID_PCM   0x0000561e
   53 #define LOGICALID_OPL   0x0300561e
   54 #define LOGICALID_MIDI  0x0400561e
   55 
   56 /* PnP IDs */
   57 static struct isa_pnp_id gusc_ids[] = {
   58         {LOGICALID_PCM,  "GRV0000 Gravis UltraSound PnP PCM"},  /* GRV0000 */
   59         {LOGICALID_OPL,  "GRV0003 Gravis UltraSound PnP OPL"},  /* GRV0003 */
   60         {LOGICALID_MIDI, "GRV0004 Gravis UltraSound PnP MIDI"}, /* GRV0004 */
   61 };
   62 
   63 /* Interrupt handler.  */
   64 struct gusc_ihandler {
   65         void (*intr)(void *);
   66         void *arg;
   67 };
   68 
   69 /* Here is the parameter structure per a device. */
   70 struct gusc_softc {
   71         device_t dev; /* device */
   72         int io_rid[3]; /* io port rids */
   73         struct resource *io[3]; /* io port resources */
   74         int io_alloced[3]; /* io port alloc flag */
   75         int irq_rid; /* irq rids */
   76         struct resource *irq; /* irq resources */
   77         int irq_alloced; /* irq alloc flag */
   78         int drq_rid[2]; /* drq rids */
   79         struct resource *drq[2]; /* drq resources */
   80         int drq_alloced[2]; /* drq alloc flag */
   81 
   82         /* Interrupts are shared (XXX non-PnP only?) */
   83         struct gusc_ihandler midi_intr;
   84         struct gusc_ihandler pcm_intr;
   85 };
   86 
   87 typedef struct gusc_softc *sc_p;
   88 
   89 static int gusc_probe(device_t dev);
   90 static int gusc_attach(device_t dev);
   91 static int gusisa_probe(device_t dev);
   92 static void gusc_intr(void *);
   93 static struct resource *gusc_alloc_resource(device_t bus, device_t child, int type, int *rid,
   94                                             rman_res_t start, rman_res_t end, rman_res_t count, u_int flags);
   95 static int gusc_release_resource(device_t bus, device_t child, int type, int rid,
   96                                    struct resource *r);
   97 
   98 static device_t find_masterdev(sc_p scp);
   99 static int alloc_resource(sc_p scp);
  100 static int release_resource(sc_p scp);
  101 
  102 static devclass_t gusc_devclass;
  103 
  104 static int
  105 gusc_probe(device_t dev)
  106 {
  107         device_t child;
  108         u_int32_t logical_id;
  109         char *s;
  110         struct sndcard_func *func;
  111         int ret;
  112 
  113         logical_id = isa_get_logicalid(dev);
  114         s = NULL;
  115 
  116         /* Check isapnp ids */
  117         if (logical_id != 0 && (ret = ISA_PNP_PROBE(device_get_parent(dev), dev, gusc_ids)) != 0)
  118                 return (ret);
  119         else {
  120                 if (logical_id == 0)
  121                         return gusisa_probe(dev);
  122         }
  123 
  124         switch (logical_id) {
  125         case LOGICALID_PCM:
  126                 s = "Gravis UltraSound Plug & Play PCM";
  127                 func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  128                 if (func == NULL)
  129                         return (ENOMEM);
  130                 func->func = SCF_PCM;
  131                 child = device_add_child(dev, "pcm", -1);
  132                 device_set_ivars(child, func);
  133                 break;
  134         case LOGICALID_OPL:
  135                 s = "Gravis UltraSound Plug & Play OPL";
  136                 func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  137                 if (func == NULL)
  138                         return (ENOMEM);
  139                 func->func = SCF_SYNTH;
  140                 child = device_add_child(dev, "midi", -1);
  141                 device_set_ivars(child, func);
  142                 break;
  143         case LOGICALID_MIDI:
  144                 s = "Gravis UltraSound Plug & Play MIDI";
  145                 func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  146                 if (func == NULL)
  147                         return (ENOMEM);
  148                 func->func = SCF_MIDI;
  149                 child = device_add_child(dev, "midi", -1);
  150                 device_set_ivars(child, func);
  151                 break;
  152         }
  153 
  154         if (s != NULL) {
  155                 device_set_desc(dev, s);
  156                 return (0);
  157         }
  158 
  159         return (ENXIO);
  160 }
  161 
  162 static void
  163 port_wr(struct resource *r, int i, unsigned char v)
  164 {
  165         bus_space_write_1(rman_get_bustag(r), rman_get_bushandle(r), i, v);
  166 }
  167 
  168 static int
  169 port_rd(struct resource *r, int i)
  170 {
  171         return bus_space_read_1(rman_get_bustag(r), rman_get_bushandle(r), i);
  172 }
  173 
  174 /*
  175  * Probe for an old (non-PnP) GUS card on the ISA bus.
  176  */
  177 
  178 static int
  179 gusisa_probe(device_t dev)
  180 {
  181         device_t child;
  182         struct resource *res, *res2;
  183         int base, rid, rid2, s, flags;
  184         unsigned char val;
  185 
  186         base = isa_get_port(dev);
  187         flags = device_get_flags(dev);
  188         rid = 1;
  189         res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, base + 0x100,
  190                                  base + 0x107, 8, RF_ACTIVE);
  191 
  192         if (res == NULL)
  193                 return ENXIO;
  194 
  195         res2 = NULL;
  196 
  197         /*
  198          * Check for the presence of some GUS card.  Reset the card,
  199          * then see if we can access the memory on it.
  200          */
  201 
  202         port_wr(res, 3, 0x4c);
  203         port_wr(res, 5, 0);
  204         DELAY(30 * 1000);
  205 
  206         port_wr(res, 3, 0x4c);
  207         port_wr(res, 5, 1);
  208         DELAY(30 * 1000);
  209 
  210         s = splhigh();
  211 
  212         /* Write to DRAM.  */
  213 
  214         port_wr(res, 3, 0x43);          /* Register select */
  215         port_wr(res, 4, 0);             /* Low addr */
  216         port_wr(res, 5, 0);             /* Med addr */
  217 
  218         port_wr(res, 3, 0x44);          /* Register select */
  219         port_wr(res, 4, 0);             /* High addr */
  220         port_wr(res, 7, 0x55);          /* DRAM */
  221 
  222         /* Read from DRAM.  */
  223 
  224         port_wr(res, 3, 0x43);          /* Register select */
  225         port_wr(res, 4, 0);             /* Low addr */
  226         port_wr(res, 5, 0);             /* Med addr */
  227 
  228         port_wr(res, 3, 0x44);          /* Register select */
  229         port_wr(res, 4, 0);             /* High addr */
  230         val = port_rd(res, 7);          /* DRAM */
  231 
  232         splx(s);
  233 
  234         if (val != 0x55)
  235                 goto fail;
  236 
  237         rid2 = 0;
  238         res2 = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid2, base, base, 1,
  239                                   RF_ACTIVE);
  240 
  241         if (res2 == NULL)
  242                 goto fail;
  243 
  244         s = splhigh();
  245         port_wr(res2, 0x0f, 0x20);
  246         val = port_rd(res2, 0x0f);
  247         splx(s);
  248 
  249         if (val == 0xff || (val & 0x06) == 0)
  250                 val = 0;
  251         else {
  252                 val = port_rd(res2, 0x506);     /* XXX Out of range.  */
  253                 if (val == 0xff)
  254                         val = 0;
  255         }
  256 
  257         bus_release_resource(dev, SYS_RES_IOPORT, rid2, res2);
  258         bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
  259 
  260         if (val >= 10) {
  261                 struct sndcard_func *func;
  262 
  263                 /* Looks like a GUS MAX.  Set the rest of the resources.  */
  264 
  265                 bus_set_resource(dev, SYS_RES_IOPORT, 2, base + 0x10c, 8);
  266 
  267                 if (flags & DV_F_DUAL_DMA)
  268                         bus_set_resource(dev, SYS_RES_DRQ, 1,
  269                                          flags & DV_F_DRQ_MASK, 1);
  270 
  271                 /* We can support the CS4231 and MIDI devices.  */
  272 
  273                 func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  274                 if (func == NULL)
  275                         return ENOMEM;
  276                 func->func = SCF_MIDI;
  277                 child = device_add_child(dev, "midi", -1);
  278                 device_set_ivars(child, func);
  279 
  280                 func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  281                 if (func == NULL)
  282                         printf("xxx: gus pcm not attached, out of memory\n");
  283                 else {
  284                         func->func = SCF_PCM;
  285                         child = device_add_child(dev, "pcm", -1);
  286                         device_set_ivars(child, func);
  287                 }
  288                 device_set_desc(dev, "Gravis UltraSound MAX");
  289                 return 0;
  290         } else {
  291 
  292                 /*
  293                  * TODO: Support even older GUS cards.  MIDI should work on
  294                  * all models.
  295                  */
  296                 return ENXIO;
  297         }
  298 
  299 fail:
  300         bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
  301         return ENXIO;
  302 }
  303 
  304 static int
  305 gusc_attach(device_t dev)
  306 {
  307         sc_p scp;
  308         void *ih;
  309 
  310         scp = device_get_softc(dev);
  311 
  312         bzero(scp, sizeof(*scp));
  313 
  314         scp->dev = dev;
  315         if (alloc_resource(scp)) {
  316                 release_resource(scp);
  317                 return (ENXIO);
  318         }
  319 
  320         if (scp->irq != NULL)
  321                 snd_setup_intr(dev, scp->irq, 0, gusc_intr, scp, &ih);
  322         bus_generic_attach(dev);
  323 
  324         return (0);
  325 }
  326 
  327 /*
  328  * Handle interrupts on GUS devices until there aren't any left.
  329  */
  330 static void
  331 gusc_intr(void *arg)
  332 {
  333         sc_p scp = (sc_p)arg;
  334         int did_something;
  335 
  336         do {
  337                 did_something = 0;
  338                 if (scp->pcm_intr.intr != NULL &&
  339                     (port_rd(scp->io[2], 2) & 1)) {
  340                         (*scp->pcm_intr.intr)(scp->pcm_intr.arg);
  341                         did_something = 1;
  342                 }
  343                 if (scp->midi_intr.intr != NULL &&
  344                     (port_rd(scp->io[1], 0) & 0x80)) {
  345                         (*scp->midi_intr.intr)(scp->midi_intr.arg);
  346                         did_something = 1;
  347                 }
  348         } while (did_something != 0);
  349 }
  350 
  351 static struct resource *
  352 gusc_alloc_resource(device_t bus, device_t child, int type, int *rid,
  353                     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  354 {
  355         sc_p scp;
  356         int *alloced, rid_max, alloced_max;
  357         struct resource **res;
  358 
  359         scp = device_get_softc(bus);
  360         switch (type) {
  361         case SYS_RES_IOPORT:
  362                 alloced = scp->io_alloced;
  363                 res = scp->io;
  364                 rid_max = 2;
  365                 alloced_max = 2; /* pcm + midi (more to include synth) */
  366                 break;
  367         case SYS_RES_IRQ:
  368                 alloced = &scp->irq_alloced;
  369                 res = &scp->irq;
  370                 rid_max = 0;
  371                 alloced_max = 2; /* pcm and midi share the single irq. */
  372                 break;
  373         case SYS_RES_DRQ:
  374                 alloced = scp->drq_alloced;
  375                 res = scp->drq;
  376                 rid_max = 1;
  377                 alloced_max = 1;
  378                 break;
  379         default:
  380                 return (NULL);
  381         }
  382 
  383         if (*rid > rid_max || alloced[*rid] == alloced_max)
  384                 return (NULL);
  385 
  386         alloced[*rid]++;
  387         return (res[*rid]);
  388 }
  389 
  390 static int
  391 gusc_release_resource(device_t bus, device_t child, int type, int rid,
  392                         struct resource *r)
  393 {
  394         sc_p scp;
  395         int *alloced, rid_max;
  396 
  397         scp = device_get_softc(bus);
  398         switch (type) {
  399         case SYS_RES_IOPORT:
  400                 alloced = scp->io_alloced;
  401                 rid_max = 2;
  402                 break;
  403         case SYS_RES_IRQ:
  404                 alloced = &scp->irq_alloced;
  405                 rid_max = 0;
  406                 break;
  407         case SYS_RES_DRQ:
  408                 alloced = scp->drq_alloced;
  409                 rid_max = 1;
  410                 break;
  411         default:
  412                 return (1);
  413         }
  414 
  415         if (rid > rid_max || alloced[rid] == 0)
  416                 return (1);
  417 
  418         alloced[rid]--;
  419         return (0);
  420 }
  421 
  422 static int
  423 gusc_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
  424                 driver_filter_t *filter,
  425                 driver_intr_t *intr, void *arg, void **cookiep)
  426 {
  427         sc_p scp = (sc_p)device_get_softc(dev);
  428         devclass_t devclass;
  429 
  430         if (filter != NULL) {
  431                 printf("gusc.c: we cannot use a filter here\n");
  432                 return (EINVAL);
  433         }
  434         devclass = device_get_devclass(child);
  435         if (strcmp(devclass_get_name(devclass), "midi") == 0) {
  436                 scp->midi_intr.intr = intr;
  437                 scp->midi_intr.arg = arg;
  438                 return 0;
  439         } else if (strcmp(devclass_get_name(devclass), "pcm") == 0) {
  440                 scp->pcm_intr.intr = intr;
  441                 scp->pcm_intr.arg = arg;
  442                 return 0;
  443         }
  444         return bus_generic_setup_intr(dev, child, irq, flags,
  445                                 filter,
  446                                 intr, arg, cookiep);
  447 }
  448 
  449 static device_t
  450 find_masterdev(sc_p scp)
  451 {
  452         int i, units;
  453         devclass_t devclass;
  454         device_t dev;
  455 
  456         devclass = device_get_devclass(scp->dev);
  457         units = devclass_get_maxunit(devclass);
  458         dev = NULL;
  459         for (i = 0 ; i < units ; i++) {
  460                 dev = devclass_get_device(devclass, i);
  461                 if (isa_get_vendorid(dev) == isa_get_vendorid(scp->dev)
  462                     && isa_get_logicalid(dev) == LOGICALID_PCM
  463                     && isa_get_serial(dev) == isa_get_serial(scp->dev))
  464                         break;
  465         }
  466         if (i == units)
  467                 return (NULL);
  468 
  469         return (dev);
  470 }
  471 
  472 static int io_range[3]  = {0x10, 0x8  , 0x4  };
  473 static int io_offset[3] = {0x0 , 0x100, 0x10c};
  474 static int
  475 alloc_resource(sc_p scp)
  476 {
  477         int i, base, lid, flags;
  478         device_t dev;
  479 
  480         flags = 0;
  481         if (isa_get_vendorid(scp->dev))
  482                 lid = isa_get_logicalid(scp->dev);
  483         else {
  484                 lid = LOGICALID_NOPNP;
  485                 flags = device_get_flags(scp->dev);
  486         }
  487         switch(lid) {
  488         case LOGICALID_PCM:
  489         case LOGICALID_NOPNP:           /* XXX Non-PnP */
  490                 if (lid == LOGICALID_NOPNP)
  491                         base = isa_get_port(scp->dev);
  492                 else
  493                         base = 0;
  494                 for (i = 0 ; i < nitems(scp->io); i++) {
  495                         if (scp->io[i] == NULL) {
  496                                 scp->io_rid[i] = i;
  497                                 if (base == 0)
  498                                         scp->io[i] =
  499                                             bus_alloc_resource_anywhere(scp->dev,
  500                                                                         SYS_RES_IOPORT,
  501                                                                         &scp->io_rid[i],
  502                                                                         io_range[i],
  503                                                                         RF_ACTIVE);
  504                                 else
  505                                         scp->io[i] = bus_alloc_resource(scp->dev, SYS_RES_IOPORT, &scp->io_rid[i],
  506                                                                         base + io_offset[i],
  507                                                                         base + io_offset[i] + io_range[i] - 1
  508                                                                         , io_range[i], RF_ACTIVE);
  509                                 if (scp->io[i] == NULL)
  510                                         return (1);
  511                                 scp->io_alloced[i] = 0;
  512                         }
  513                 }
  514                 if (scp->irq == NULL) {
  515                         scp->irq_rid = 0;
  516                         scp->irq = 
  517                                 bus_alloc_resource_any(scp->dev, SYS_RES_IRQ, 
  518                                                        &scp->irq_rid,
  519                                                        RF_ACTIVE|RF_SHAREABLE);
  520                         if (scp->irq == NULL)
  521                                 return (1);
  522                         scp->irq_alloced = 0;
  523                 }
  524                 for (i = 0 ; i < nitems(scp->drq); i++) {
  525                         if (scp->drq[i] == NULL) {
  526                                 scp->drq_rid[i] = i;
  527                                 if (base == 0 || i == 0)
  528                                         scp->drq[i] = 
  529                                                 bus_alloc_resource_any(
  530                                                         scp->dev, SYS_RES_DRQ,
  531                                                         &scp->drq_rid[i],
  532                                                         RF_ACTIVE);
  533                                 else if ((flags & DV_F_DUAL_DMA) != 0)
  534                                         /* XXX The secondary drq is specified in the flag. */
  535                                         scp->drq[i] = bus_alloc_resource(scp->dev, SYS_RES_DRQ, &scp->drq_rid[i],
  536                                                                          flags & DV_F_DRQ_MASK,
  537                                                                          flags & DV_F_DRQ_MASK, 1, RF_ACTIVE);
  538                                 if (scp->drq[i] == NULL)
  539                                         return (1);
  540                                 scp->drq_alloced[i] = 0;
  541                         }
  542                 }
  543                 break;
  544         case LOGICALID_OPL:
  545                 if (scp->io[0] == NULL) {
  546                         scp->io_rid[0] = 0;
  547                         scp->io[0] = bus_alloc_resource_anywhere(scp->dev,
  548                                                                  SYS_RES_IOPORT,
  549                                                                  &scp->io_rid[0],
  550                                                                  io_range[0],
  551                                                                  RF_ACTIVE);
  552                         if (scp->io[0] == NULL)
  553                                 return (1);
  554                         scp->io_alloced[0] = 0;
  555                 }
  556                 break;
  557         case LOGICALID_MIDI:
  558                 if (scp->io[0] == NULL) {
  559                         scp->io_rid[0] = 0;
  560                         scp->io[0] = bus_alloc_resource_anywhere(scp->dev,
  561                                                                  SYS_RES_IOPORT,
  562                                                                  &scp->io_rid[0],
  563                                                                  io_range[0],
  564                                                                  RF_ACTIVE);
  565                         if (scp->io[0] == NULL)
  566                                 return (1);
  567                         scp->io_alloced[0] = 0;
  568                 }
  569                 if (scp->irq == NULL) {
  570                         /* The irq is shared with pcm audio. */
  571                         dev = find_masterdev(scp);
  572                         if (dev == NULL)
  573                                 return (1);
  574                         scp->irq_rid = 0;
  575                         scp->irq = BUS_ALLOC_RESOURCE(dev, NULL, SYS_RES_IRQ, &scp->irq_rid,
  576                                                       0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
  577                         if (scp->irq == NULL)
  578                                 return (1);
  579                         scp->irq_alloced = 0;
  580                 }
  581                 break;
  582         }
  583         return (0);
  584 }
  585 
  586 static int
  587 release_resource(sc_p scp)
  588 {
  589         int i, lid;
  590         device_t dev;
  591 
  592         if (isa_get_vendorid(scp->dev))
  593                 lid = isa_get_logicalid(scp->dev);
  594         else
  595                 lid = LOGICALID_NOPNP;
  596 
  597         switch(lid) {
  598         case LOGICALID_PCM:
  599         case LOGICALID_NOPNP:           /* XXX Non-PnP */
  600                 for (i = 0 ; i < nitems(scp->io); i++) {
  601                         if (scp->io[i] != NULL) {
  602                                 bus_release_resource(scp->dev, SYS_RES_IOPORT, scp->io_rid[i], scp->io[i]);
  603                                 scp->io[i] = NULL;
  604                         }
  605                 }
  606                 if (scp->irq != NULL) {
  607                         bus_release_resource(scp->dev, SYS_RES_IRQ, scp->irq_rid, scp->irq);
  608                         scp->irq = NULL;
  609                 }
  610                 for (i = 0 ; i < nitems(scp->drq); i++) {
  611                         if (scp->drq[i] != NULL) {
  612                                 bus_release_resource(scp->dev, SYS_RES_DRQ, scp->drq_rid[i], scp->drq[i]);
  613                                 scp->drq[i] = NULL;
  614                         }
  615                 }
  616                 break;
  617         case LOGICALID_OPL:
  618                 if (scp->io[0] != NULL) {
  619                         bus_release_resource(scp->dev, SYS_RES_IOPORT, scp->io_rid[0], scp->io[0]);
  620                         scp->io[0] = NULL;
  621                 }
  622                 break;
  623         case LOGICALID_MIDI:
  624                 if (scp->io[0] != NULL) {
  625                         bus_release_resource(scp->dev, SYS_RES_IOPORT, scp->io_rid[0], scp->io[0]);
  626                         scp->io[0] = NULL;
  627                 }
  628                 if (scp->irq != NULL) {
  629                         /* The irq is shared with pcm audio. */
  630                         dev = find_masterdev(scp);
  631                         if (dev == NULL)
  632                                 return (1);
  633                         BUS_RELEASE_RESOURCE(dev, NULL, SYS_RES_IOPORT, scp->irq_rid, scp->irq);
  634                         scp->irq = NULL;
  635                 }
  636                 break;
  637         }
  638         return (0);
  639 }
  640 
  641 static device_method_t gusc_methods[] = {
  642         /* Device interface */
  643         DEVMETHOD(device_probe,         gusc_probe),
  644         DEVMETHOD(device_attach,        gusc_attach),
  645         DEVMETHOD(device_detach,        bus_generic_detach),
  646         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  647         DEVMETHOD(device_suspend,       bus_generic_suspend),
  648         DEVMETHOD(device_resume,        bus_generic_resume),
  649 
  650         /* Bus interface */
  651         DEVMETHOD(bus_alloc_resource,   gusc_alloc_resource),
  652         DEVMETHOD(bus_release_resource, gusc_release_resource),
  653         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  654         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  655         DEVMETHOD(bus_setup_intr,       gusc_setup_intr),
  656         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  657 
  658         DEVMETHOD_END
  659 };
  660 
  661 static driver_t gusc_driver = {
  662         "gusc",
  663         gusc_methods,
  664         sizeof(struct gusc_softc),
  665 };
  666 
  667 /*
  668  * gusc can be attached to an isa bus.
  669  */
  670 DRIVER_MODULE(snd_gusc, isa, gusc_driver, gusc_devclass, 0, 0);
  671 DRIVER_MODULE(snd_gusc, acpi, gusc_driver, gusc_devclass, 0, 0);
  672 MODULE_DEPEND(snd_gusc, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
  673 MODULE_VERSION(snd_gusc, 1);
  674 
  675 

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