The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/isa/sbc.c

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    1 /*-
    2  * Copyright (c) 1999 Seigo Tanimura
    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.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #ifdef HAVE_KERNEL_OPTION_HEADERS
   28 #include "opt_snd.h"
   29 #endif
   30 
   31 #include <dev/sound/chip.h>
   32 #include <dev/sound/pcm/sound.h>
   33 #include <dev/sound/isa/sb.h>
   34 
   35 #include <isa/isavar.h>
   36 
   37 SND_DECLARE_FILE("$FreeBSD: releng/8.0/sys/dev/sound/isa/sbc.c 193640 2009-06-07 19:12:08Z ariff $");
   38 
   39 #define IO_MAX  3
   40 #define IRQ_MAX 1
   41 #define DRQ_MAX 2
   42 #define INTR_MAX        2
   43 
   44 struct sbc_softc;
   45 
   46 struct sbc_ihl {
   47         driver_intr_t *intr[INTR_MAX];
   48         void *intr_arg[INTR_MAX];
   49         struct sbc_softc *parent;
   50 };
   51 
   52 /* Here is the parameter structure per a device. */
   53 struct sbc_softc {
   54         device_t dev; /* device */
   55         device_t child_pcm, child_midi1, child_midi2;
   56 
   57         int io_rid[IO_MAX]; /* io port rids */
   58         struct resource *io[IO_MAX]; /* io port resources */
   59         int io_alloced[IO_MAX]; /* io port alloc flag */
   60 
   61         int irq_rid[IRQ_MAX]; /* irq rids */
   62         struct resource *irq[IRQ_MAX]; /* irq resources */
   63         int irq_alloced[IRQ_MAX]; /* irq alloc flag */
   64 
   65         int drq_rid[DRQ_MAX]; /* drq rids */
   66         struct resource *drq[DRQ_MAX]; /* drq resources */
   67         int drq_alloced[DRQ_MAX]; /* drq alloc flag */
   68 
   69         struct sbc_ihl ihl[IRQ_MAX];
   70 
   71         void *ih[IRQ_MAX];
   72 
   73         struct mtx *lock;
   74 
   75         u_int32_t bd_ver;
   76 };
   77 
   78 static int sbc_probe(device_t dev);
   79 static int sbc_attach(device_t dev);
   80 static void sbc_intr(void *p);
   81 
   82 static struct resource *sbc_alloc_resource(device_t bus, device_t child, int type, int *rid,
   83                                            u_long start, u_long end, u_long count, u_int flags);
   84 static int sbc_release_resource(device_t bus, device_t child, int type, int rid,
   85                                 struct resource *r);
   86 static int sbc_setup_intr(device_t dev, device_t child, struct resource *irq,
   87                int flags,
   88 #if __FreeBSD_version >= 700031
   89                driver_filter_t *filter,
   90 #endif
   91                driver_intr_t *intr, 
   92                void *arg, void **cookiep);
   93 static int sbc_teardown_intr(device_t dev, device_t child, struct resource *irq,
   94                   void *cookie);
   95 
   96 static int alloc_resource(struct sbc_softc *scp);
   97 static int release_resource(struct sbc_softc *scp);
   98 
   99 static devclass_t sbc_devclass;
  100 
  101 static int io_range[3] = {0x10, 0x2, 0x4};
  102 
  103 #ifdef PC98 /* I/O address table for PC98 */
  104 static bus_addr_t pcm_iat[] = {
  105         0x000, 0x100, 0x200, 0x300, 0x400, 0x500, 0x600, 0x700,
  106         0x800, 0x900, 0xa00, 0xb00, 0xc00, 0xd00, 0xe00, 0xf00
  107 };
  108 static bus_addr_t midi_iat[] = {
  109         0x000, 0x100
  110 };
  111 static bus_addr_t opl_iat[] = {
  112         0x000, 0x100, 0x200, 0x300
  113 };
  114 static bus_addr_t *sb_iat[] = { pcm_iat, midi_iat, opl_iat };
  115 #endif
  116 
  117 static int sb_rd(struct resource *io, int reg);
  118 static void sb_wr(struct resource *io, int reg, u_int8_t val);
  119 static int sb_dspready(struct resource *io);
  120 static int sb_cmd(struct resource *io, u_char val);
  121 static u_int sb_get_byte(struct resource *io);
  122 static void sb_setmixer(struct resource *io, u_int port, u_int value);
  123 
  124 static void
  125 sbc_lockinit(struct sbc_softc *scp)
  126 {
  127         scp->lock = snd_mtxcreate(device_get_nameunit(scp->dev),
  128             "snd_sbc softc");
  129 }
  130 
  131 static void
  132 sbc_lockdestroy(struct sbc_softc *scp)
  133 {
  134         snd_mtxfree(scp->lock);
  135 }
  136 
  137 void
  138 sbc_lock(struct sbc_softc *scp)
  139 {
  140         snd_mtxlock(scp->lock);
  141 }
  142 
  143 void
  144 sbc_lockassert(struct sbc_softc *scp)
  145 {
  146         snd_mtxassert(scp->lock);
  147 }
  148 
  149 void
  150 sbc_unlock(struct sbc_softc *scp)
  151 {
  152         snd_mtxunlock(scp->lock);
  153 }
  154 
  155 static int
  156 sb_rd(struct resource *io, int reg)
  157 {
  158         return bus_space_read_1(rman_get_bustag(io),
  159                                 rman_get_bushandle(io),
  160                                 reg);
  161 }
  162 
  163 static void
  164 sb_wr(struct resource *io, int reg, u_int8_t val)
  165 {
  166         bus_space_write_1(rman_get_bustag(io),
  167                           rman_get_bushandle(io),
  168                           reg, val);
  169 }
  170 
  171 static int
  172 sb_dspready(struct resource *io)
  173 {
  174         return ((sb_rd(io, SBDSP_STATUS) & 0x80) == 0);
  175 }
  176 
  177 static int
  178 sb_dspwr(struct resource *io, u_char val)
  179 {
  180         int  i;
  181 
  182         for (i = 0; i < 1000; i++) {
  183                 if (sb_dspready(io)) {
  184                         sb_wr(io, SBDSP_CMD, val);
  185                         return 1;
  186                 }
  187                 if (i > 10) DELAY((i > 100)? 1000 : 10);
  188         }
  189         printf("sb_dspwr(0x%02x) timed out.\n", val);
  190         return 0;
  191 }
  192 
  193 static int
  194 sb_cmd(struct resource *io, u_char val)
  195 {
  196         return sb_dspwr(io, val);
  197 }
  198 
  199 static void
  200 sb_setmixer(struct resource *io, u_int port, u_int value)
  201 {
  202         u_long   flags;
  203 
  204         flags = spltty();
  205         sb_wr(io, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  206         DELAY(10);
  207         sb_wr(io, SB_MIX_DATA, (u_char) (value & 0xff));
  208         DELAY(10);
  209         splx(flags);
  210 }
  211 
  212 static u_int
  213 sb_get_byte(struct resource *io)
  214 {
  215         int i;
  216 
  217         for (i = 1000; i > 0; i--) {
  218                 if (sb_rd(io, DSP_DATA_AVAIL) & 0x80)
  219                         return sb_rd(io, DSP_READ);
  220                 else
  221                         DELAY(20);
  222         }
  223         return 0xffff;
  224 }
  225 
  226 static int
  227 sb_reset_dsp(struct resource *io)
  228 {
  229         sb_wr(io, SBDSP_RST, 3);
  230         DELAY(100);
  231         sb_wr(io, SBDSP_RST, 0);
  232         return (sb_get_byte(io) == 0xAA)? 0 : ENXIO;
  233 }
  234 
  235 static int
  236 sb_identify_board(struct resource *io)
  237 {
  238         int ver, essver, rev;
  239 
  240         sb_cmd(io, DSP_CMD_GETVER);     /* Get version */
  241         ver = (sb_get_byte(io) << 8) | sb_get_byte(io);
  242         if (ver < 0x100 || ver > 0x4ff) return 0;
  243         if (ver == 0x0301) {
  244                 /* Try to detect ESS chips. */
  245                 sb_cmd(io, DSP_CMD_GETID); /* Return ident. bytes. */
  246                 essver = (sb_get_byte(io) << 8) | sb_get_byte(io);
  247                 rev = essver & 0x000f;
  248                 essver &= 0xfff0;
  249                 if (essver == 0x4880) ver |= 0x1000;
  250                 else if (essver == 0x6880) ver = 0x0500 | rev;
  251         }
  252         return ver;
  253 }
  254 
  255 static struct isa_pnp_id sbc_ids[] = {
  256         {0x01008c0e, "Creative ViBRA16C"},              /* CTL0001 */
  257         {0x31008c0e, "Creative SB16/SB32"},             /* CTL0031 */
  258         {0x41008c0e, "Creative SB16/SB32"},             /* CTL0041 */
  259         {0x42008c0e, "Creative SB AWE64"},              /* CTL0042 */
  260         {0x43008c0e, "Creative ViBRA16X"},              /* CTL0043 */
  261         {0x44008c0e, "Creative SB AWE64 Gold"},         /* CTL0044 */
  262         {0x45008c0e, "Creative SB AWE64"},              /* CTL0045 */
  263         {0x46008c0e, "Creative SB AWE64"},              /* CTL0046 */
  264 
  265         {0x01000000, "Avance Logic ALS100+"},           /* @@@0001 - ViBRA16X clone */
  266         {0x01100000, "Avance Asound 110"},              /* @@@1001 */
  267         {0x01200000, "Avance Logic ALS120"},            /* @@@2001 - ViBRA16X clone */
  268 
  269         {0x81167316, "ESS ES1681"},                     /* ESS1681 */
  270         {0x02017316, "ESS ES1688"},                     /* ESS1688 */
  271         {0x68097316, "ESS ES1688"},                     /* ESS1688 */
  272         {0x68187316, "ESS ES1868"},                     /* ESS1868 */
  273         {0x03007316, "ESS ES1869"},                     /* ESS1869 */
  274         {0x69187316, "ESS ES1869"},                     /* ESS1869 */
  275         {0xabb0110e, "ESS ES1869 (Compaq OEM)"},        /* CPQb0ab */
  276         {0xacb0110e, "ESS ES1869 (Compaq OEM)"},        /* CPQb0ac */
  277         {0x78187316, "ESS ES1878"},                     /* ESS1878 */
  278         {0x79187316, "ESS ES1879"},                     /* ESS1879 */
  279         {0x88187316, "ESS ES1888"},                     /* ESS1888 */
  280         {0x07017316, "ESS ES1888 (DEC OEM)"},           /* ESS0107 */
  281         {0x06017316, "ESS ES1888 (Dell OEM)"},          /* ESS0106 */
  282         {0}
  283 };
  284 
  285 static int
  286 sbc_probe(device_t dev)
  287 {
  288         char *s = NULL;
  289         u_int32_t lid, vid;
  290 
  291         lid = isa_get_logicalid(dev);
  292         vid = isa_get_vendorid(dev);
  293         if (lid) {
  294                 if (lid == 0x01000000 && vid != 0x01009305) /* ALS0001 */
  295                         return ENXIO;
  296                 /* Check pnp ids */
  297                 return ISA_PNP_PROBE(device_get_parent(dev), dev, sbc_ids);
  298         } else {
  299                 int rid = 0, ver;
  300                 struct resource *io;
  301 
  302 #ifdef PC98
  303                 io = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
  304                                          pcm_iat, 16, RF_ACTIVE);
  305 #else
  306                 io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
  307                                         0, ~0, 16, RF_ACTIVE);
  308 #endif
  309                 if (!io) goto bad;
  310 #ifdef PC98
  311                 isa_load_resourcev(io, pcm_iat, 16);
  312 #endif
  313                 if (sb_reset_dsp(io)) goto bad2;
  314                 ver = sb_identify_board(io);
  315                 if (ver == 0) goto bad2;
  316                 switch ((ver & 0x00000f00) >> 8) {
  317                 case 1:
  318                         device_set_desc(dev, "SoundBlaster 1.0 (not supported)");
  319                         s = NULL;
  320                         break;
  321 
  322                 case 2:
  323                         s = "SoundBlaster 2.0";
  324                         break;
  325 
  326                 case 3:
  327                         s = (ver & 0x0000f000)? "ESS 488" : "SoundBlaster Pro";
  328                         break;
  329 
  330                 case 4:
  331                         s = "SoundBlaster 16";
  332                         break;
  333 
  334                 case 5:
  335                         s = (ver & 0x00000008)? "ESS 688" : "ESS 1688";
  336                         break;
  337                 }
  338                 if (s) device_set_desc(dev, s);
  339 bad2:           bus_release_resource(dev, SYS_RES_IOPORT, rid, io);
  340 bad:            return s? 0 : ENXIO;
  341         }
  342 }
  343 
  344 static int
  345 sbc_attach(device_t dev)
  346 {
  347         char *err = NULL;
  348         struct sbc_softc *scp;
  349         struct sndcard_func *func;
  350         u_int32_t logical_id = isa_get_logicalid(dev);
  351         int flags = device_get_flags(dev);
  352         int f, dh, dl, x, irq, i;
  353 
  354         if (!logical_id && (flags & DV_F_DUAL_DMA)) {
  355                 bus_set_resource(dev, SYS_RES_DRQ, 1,
  356                                  flags & DV_F_DRQ_MASK, 1);
  357         }
  358 
  359         scp = device_get_softc(dev);
  360         bzero(scp, sizeof(*scp));
  361         scp->dev = dev;
  362         sbc_lockinit(scp);
  363         err = "alloc_resource";
  364         if (alloc_resource(scp)) goto bad;
  365 
  366         err = "sb_reset_dsp";
  367         if (sb_reset_dsp(scp->io[0])) goto bad;
  368         err = "sb_identify_board";
  369         scp->bd_ver = sb_identify_board(scp->io[0]) & 0x00000fff;
  370         if (scp->bd_ver == 0) goto bad;
  371         f = 0;
  372         if (logical_id == 0x01200000 && scp->bd_ver < 0x0400) scp->bd_ver = 0x0499;
  373         switch ((scp->bd_ver & 0x0f00) >> 8) {
  374         case 1: /* old sound blaster has nothing... */
  375                 break;
  376 
  377         case 2:
  378                 f |= BD_F_DUP_MIDI;
  379                 if (scp->bd_ver > 0x200) f |= BD_F_MIX_CT1335;
  380                 break;
  381 
  382         case 5:
  383                 f |= BD_F_ESS;
  384                 scp->bd_ver = 0x0301;
  385         case 3:
  386                 f |= BD_F_DUP_MIDI | BD_F_MIX_CT1345;
  387                 break;
  388 
  389         case 4:
  390                 f |= BD_F_SB16 | BD_F_MIX_CT1745;
  391                 if (scp->drq[0]) dl = rman_get_start(scp->drq[0]); else dl = -1;
  392                 if (scp->drq[1]) dh = rman_get_start(scp->drq[1]); else dh = dl;
  393                 if (!logical_id && (dh < dl)) {
  394                         struct resource *r;
  395                         r = scp->drq[0];
  396                         scp->drq[0] = scp->drq[1];
  397                         scp->drq[1] = r;
  398                         dl = rman_get_start(scp->drq[0]);
  399                         dh = rman_get_start(scp->drq[1]);
  400                 }
  401                 /* soft irq/dma configuration */
  402                 x = -1;
  403                 irq = rman_get_start(scp->irq[0]);
  404 #ifdef PC98
  405                 /* SB16 in PC98 use different IRQ table */
  406                 if      (irq == 3) x = 1;
  407                 else if (irq == 5) x = 8;
  408                 else if (irq == 10) x = 2;
  409                 else if (irq == 12) x = 4;
  410                 if (x == -1) {
  411                         err = "bad irq (3/5/10/12 valid)";
  412                         goto bad;
  413                 }
  414                 else sb_setmixer(scp->io[0], IRQ_NR, x);
  415                 /* SB16 in PC98 use different dma setting */
  416                 sb_setmixer(scp->io[0], DMA_NR, dh == 0 ? 1 : 2);
  417 #else
  418                 if      (irq == 5) x = 2;
  419                 else if (irq == 7) x = 4;
  420                 else if (irq == 9) x = 1;
  421                 else if (irq == 10) x = 8;
  422                 if (x == -1) {
  423                         err = "bad irq (5/7/9/10 valid)";
  424                         goto bad;
  425                 }
  426                 else sb_setmixer(scp->io[0], IRQ_NR, x);
  427                 sb_setmixer(scp->io[0], DMA_NR, (1 << dh) | (1 << dl));
  428 #endif
  429                 if (bootverbose) {
  430                         device_printf(dev, "setting card to irq %d, drq %d", irq, dl);
  431                         if (dl != dh) printf(", %d", dh);
  432                         printf("\n");
  433                 }
  434                 break;
  435         }
  436 
  437         switch (logical_id) {
  438         case 0x43008c0e:        /* CTL0043 */
  439         case 0x01200000:
  440         case 0x01000000:
  441                 f |= BD_F_SB16X;
  442                 break;
  443         }
  444         scp->bd_ver |= f << 16;
  445 
  446         err = "setup_intr";
  447         for (i = 0; i < IRQ_MAX; i++) {
  448                 scp->ihl[i].parent = scp;
  449                 if (snd_setup_intr(dev, scp->irq[i], 0, sbc_intr, &scp->ihl[i], &scp->ih[i]))
  450                         goto bad;
  451         }
  452 
  453         /* PCM Audio */
  454         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  455         if (func == NULL) goto bad;
  456         func->func = SCF_PCM;
  457         scp->child_pcm = device_add_child(dev, "pcm", -1);
  458         device_set_ivars(scp->child_pcm, func);
  459 
  460         /* Midi Interface */
  461         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  462         if (func == NULL) goto bad;
  463         func->func = SCF_MIDI;
  464         scp->child_midi1 = device_add_child(dev, "midi", -1);
  465         device_set_ivars(scp->child_midi1, func);
  466 
  467         /* OPL FM Synthesizer */
  468         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  469         if (func == NULL) goto bad;
  470         func->func = SCF_SYNTH;
  471         scp->child_midi2 = device_add_child(dev, "midi", -1);
  472         device_set_ivars(scp->child_midi2, func);
  473 
  474         /* probe/attach kids */
  475         bus_generic_attach(dev);
  476 
  477         return (0);
  478 
  479 bad:    if (err) device_printf(dev, "%s\n", err);
  480         release_resource(scp);
  481         return (ENXIO);
  482 }
  483 
  484 static int
  485 sbc_detach(device_t dev)
  486 {
  487         struct sbc_softc *scp = device_get_softc(dev);
  488 
  489         sbc_lock(scp);
  490         device_delete_child(dev, scp->child_midi2);
  491         device_delete_child(dev, scp->child_midi1);
  492         device_delete_child(dev, scp->child_pcm);
  493         release_resource(scp);
  494         sbc_lockdestroy(scp);
  495         return bus_generic_detach(dev);
  496 }
  497 
  498 static void
  499 sbc_intr(void *p)
  500 {
  501         struct sbc_ihl *ihl = p;
  502         int i;
  503 
  504         /* sbc_lock(ihl->parent); */
  505         i = 0;
  506         while (i < INTR_MAX) {
  507                 if (ihl->intr[i] != NULL) ihl->intr[i](ihl->intr_arg[i]);
  508                 i++;
  509         }
  510         /* sbc_unlock(ihl->parent); */
  511 }
  512 
  513 static int
  514 sbc_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
  515 #if __FreeBSD_version >= 700031
  516                driver_filter_t *filter,
  517 #endif
  518                driver_intr_t *intr, 
  519                void *arg, void **cookiep)
  520 {
  521         struct sbc_softc *scp = device_get_softc(dev);
  522         struct sbc_ihl *ihl = NULL;
  523         int i, ret;
  524 
  525 #if __FreeBSD_version >= 700031
  526         if (filter != NULL) {
  527                 printf("sbc.c: we cannot use a filter here\n");
  528                 return (EINVAL);
  529         }
  530 #endif
  531         sbc_lock(scp);
  532         i = 0;
  533         while (i < IRQ_MAX) {
  534                 if (irq == scp->irq[i]) ihl = &scp->ihl[i];
  535                 i++;
  536         }
  537         ret = 0;
  538         if (ihl == NULL) ret = EINVAL;
  539         i = 0;
  540         while ((ret == 0) && (i < INTR_MAX)) {
  541                 if (ihl->intr[i] == NULL) {
  542                         ihl->intr[i] = intr;
  543                         ihl->intr_arg[i] = arg;
  544                         *cookiep = &ihl->intr[i];
  545                         ret = -1;
  546                 } else i++;
  547         }
  548         sbc_unlock(scp);
  549         return (ret > 0)? EINVAL : 0;
  550 }
  551 
  552 static int
  553 sbc_teardown_intr(device_t dev, device_t child, struct resource *irq,
  554                   void *cookie)
  555 {
  556         struct sbc_softc *scp = device_get_softc(dev);
  557         struct sbc_ihl *ihl = NULL;
  558         int i, ret;
  559 
  560         sbc_lock(scp);
  561         i = 0;
  562         while (i < IRQ_MAX) {
  563                 if (irq == scp->irq[i]) ihl = &scp->ihl[i];
  564                 i++;
  565         }
  566         ret = 0;
  567         if (ihl == NULL) ret = EINVAL;
  568         i = 0;
  569         while ((ret == 0) && (i < INTR_MAX)) {
  570                 if (cookie == &ihl->intr[i]) {
  571                         ihl->intr[i] = NULL;
  572                         ihl->intr_arg[i] = NULL;
  573                         return 0;
  574                 } else i++;
  575         }
  576         sbc_unlock(scp);
  577         return (ret > 0)? EINVAL : 0;
  578 }
  579 
  580 static struct resource *
  581 sbc_alloc_resource(device_t bus, device_t child, int type, int *rid,
  582                       u_long start, u_long end, u_long count, u_int flags)
  583 {
  584         struct sbc_softc *scp;
  585         int *alloced, rid_max, alloced_max;
  586         struct resource **res;
  587 #ifdef PC98
  588         int i;
  589 #endif
  590 
  591         scp = device_get_softc(bus);
  592         switch (type) {
  593         case SYS_RES_IOPORT:
  594                 alloced = scp->io_alloced;
  595                 res = scp->io;
  596 #ifdef PC98
  597                 rid_max = 0;
  598                 for (i = 0; i < IO_MAX; i++)
  599                         rid_max += io_range[i];
  600 #else
  601                 rid_max = IO_MAX - 1;
  602 #endif
  603                 alloced_max = 1;
  604                 break;
  605         case SYS_RES_DRQ:
  606                 alloced = scp->drq_alloced;
  607                 res = scp->drq;
  608                 rid_max = DRQ_MAX - 1;
  609                 alloced_max = 1;
  610                 break;
  611         case SYS_RES_IRQ:
  612                 alloced = scp->irq_alloced;
  613                 res = scp->irq;
  614                 rid_max = IRQ_MAX - 1;
  615                 alloced_max = INTR_MAX; /* pcm and mpu may share the irq. */
  616                 break;
  617         default:
  618                 return (NULL);
  619         }
  620 
  621         if (*rid > rid_max || alloced[*rid] == alloced_max)
  622                 return (NULL);
  623 
  624         alloced[*rid]++;
  625         return (res[*rid]);
  626 }
  627 
  628 static int
  629 sbc_release_resource(device_t bus, device_t child, int type, int rid,
  630                         struct resource *r)
  631 {
  632         struct sbc_softc *scp;
  633         int *alloced, rid_max;
  634 
  635         scp = device_get_softc(bus);
  636         switch (type) {
  637         case SYS_RES_IOPORT:
  638                 alloced = scp->io_alloced;
  639                 rid_max = IO_MAX - 1;
  640                 break;
  641         case SYS_RES_DRQ:
  642                 alloced = scp->drq_alloced;
  643                 rid_max = DRQ_MAX - 1;
  644                 break;
  645         case SYS_RES_IRQ:
  646                 alloced = scp->irq_alloced;
  647                 rid_max = IRQ_MAX - 1;
  648                 break;
  649         default:
  650                 return (1);
  651         }
  652 
  653         if (rid > rid_max || alloced[rid] == 0)
  654                 return (1);
  655 
  656         alloced[rid]--;
  657         return (0);
  658 }
  659 
  660 static int
  661 sbc_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
  662 {
  663         struct sbc_softc *scp = device_get_softc(bus);
  664         struct sndcard_func *func = device_get_ivars(dev);
  665 
  666         switch (index) {
  667         case 0:
  668                 *result = func->func;
  669                 break;
  670 
  671         case 1:
  672                 *result = scp->bd_ver;
  673                 break;
  674 
  675         default:
  676                 return ENOENT;
  677         }
  678 
  679         return 0;
  680 }
  681 
  682 static int
  683 sbc_write_ivar(device_t bus, device_t dev,
  684                int index, uintptr_t value)
  685 {
  686         switch (index) {
  687         case 0:
  688         case 1:
  689                 return EINVAL;
  690 
  691         default:
  692                 return (ENOENT);
  693         }
  694 }
  695 
  696 static int
  697 alloc_resource(struct sbc_softc *scp)
  698 {
  699         int i;
  700 
  701         for (i = 0 ; i < IO_MAX ; i++) {
  702                 if (scp->io[i] == NULL) {
  703 #ifdef PC98
  704                         scp->io_rid[i] = i > 0 ?
  705                                 scp->io_rid[i - 1] + io_range[i - 1] : 0;
  706                         scp->io[i] = isa_alloc_resourcev(scp->dev,
  707                                                          SYS_RES_IOPORT,
  708                                                          &scp->io_rid[i],
  709                                                          sb_iat[i],
  710                                                          io_range[i],
  711                                                          RF_ACTIVE);
  712                         if (scp->io[i] != NULL)
  713                                 isa_load_resourcev(scp->io[i], sb_iat[i],
  714                                                    io_range[i]);
  715 #else
  716                         scp->io_rid[i] = i;
  717                         scp->io[i] = bus_alloc_resource(scp->dev, SYS_RES_IOPORT, &scp->io_rid[i],
  718                                                         0, ~0, io_range[i], RF_ACTIVE);
  719 #endif
  720                         if (i == 0 && scp->io[i] == NULL)
  721                                 return (1);
  722                         scp->io_alloced[i] = 0;
  723                 }
  724         }
  725         for (i = 0 ; i < DRQ_MAX ; i++) {
  726                 if (scp->drq[i] == NULL) {
  727                         scp->drq_rid[i] = i;
  728                         scp->drq[i] = bus_alloc_resource_any(scp->dev,
  729                                                              SYS_RES_DRQ,
  730                                                              &scp->drq_rid[i],
  731                                                              RF_ACTIVE);
  732                         if (i == 0 && scp->drq[i] == NULL)
  733                                 return (1);
  734                         scp->drq_alloced[i] = 0;
  735                 }
  736         }
  737         for (i = 0 ; i < IRQ_MAX ; i++) {
  738                 if (scp->irq[i] == NULL) {
  739                         scp->irq_rid[i] = i;
  740                         scp->irq[i] = bus_alloc_resource_any(scp->dev,
  741                                                              SYS_RES_IRQ,
  742                                                              &scp->irq_rid[i],
  743                                                              RF_ACTIVE);
  744                         if (i == 0 && scp->irq[i] == NULL)
  745                                 return (1);
  746                         scp->irq_alloced[i] = 0;
  747                 }
  748         }
  749         return (0);
  750 }
  751 
  752 static int
  753 release_resource(struct sbc_softc *scp)
  754 {
  755         int i;
  756 
  757         for (i = 0 ; i < IO_MAX ; i++) {
  758                 if (scp->io[i] != NULL) {
  759                         bus_release_resource(scp->dev, SYS_RES_IOPORT, scp->io_rid[i], scp->io[i]);
  760                         scp->io[i] = NULL;
  761                 }
  762         }
  763         for (i = 0 ; i < DRQ_MAX ; i++) {
  764                 if (scp->drq[i] != NULL) {
  765                         bus_release_resource(scp->dev, SYS_RES_DRQ, scp->drq_rid[i], scp->drq[i]);
  766                         scp->drq[i] = NULL;
  767                 }
  768         }
  769         for (i = 0 ; i < IRQ_MAX ; i++) {
  770                 if (scp->irq[i] != NULL) {
  771                         if (scp->ih[i] != NULL)
  772                                 bus_teardown_intr(scp->dev, scp->irq[i], scp->ih[i]);
  773                         scp->ih[i] = NULL;
  774                         bus_release_resource(scp->dev, SYS_RES_IRQ, scp->irq_rid[i], scp->irq[i]);
  775                         scp->irq[i] = NULL;
  776                 }
  777         }
  778         return (0);
  779 }
  780 
  781 static device_method_t sbc_methods[] = {
  782         /* Device interface */
  783         DEVMETHOD(device_probe,         sbc_probe),
  784         DEVMETHOD(device_attach,        sbc_attach),
  785         DEVMETHOD(device_detach,        sbc_detach),
  786         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  787         DEVMETHOD(device_suspend,       bus_generic_suspend),
  788         DEVMETHOD(device_resume,        bus_generic_resume),
  789 
  790         /* Bus interface */
  791         DEVMETHOD(bus_read_ivar,        sbc_read_ivar),
  792         DEVMETHOD(bus_write_ivar,       sbc_write_ivar),
  793         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  794         DEVMETHOD(bus_alloc_resource,   sbc_alloc_resource),
  795         DEVMETHOD(bus_release_resource, sbc_release_resource),
  796         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  797         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  798         DEVMETHOD(bus_setup_intr,       sbc_setup_intr),
  799         DEVMETHOD(bus_teardown_intr,    sbc_teardown_intr),
  800 
  801         { 0, 0 }
  802 };
  803 
  804 static driver_t sbc_driver = {
  805         "sbc",
  806         sbc_methods,
  807         sizeof(struct sbc_softc),
  808 };
  809 
  810 /* sbc can be attached to an isa bus. */
  811 DRIVER_MODULE(snd_sbc, isa, sbc_driver, sbc_devclass, 0, 0);
  812 DRIVER_MODULE(snd_sbc, acpi, sbc_driver, sbc_devclass, 0, 0);
  813 MODULE_DEPEND(snd_sbc, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
  814 MODULE_VERSION(snd_sbc, 1);

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