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 #include <dev/sound/chip.h>
   28 #include <dev/sound/pcm/sound.h>
   29 #include <dev/sound/isa/sb.h>
   30 
   31 #include <isa/isavar.h>
   32 
   33 SND_DECLARE_FILE("$FreeBSD: releng/5.4/sys/dev/sound/isa/sbc.c 141016 2005-01-30 01:00:13Z imp $");
   34 
   35 #define IO_MAX  3
   36 #define IRQ_MAX 1
   37 #define DRQ_MAX 2
   38 #define INTR_MAX        2
   39 
   40 struct sbc_softc;
   41 
   42 struct sbc_ihl {
   43         driver_intr_t *intr[INTR_MAX];
   44         void *intr_arg[INTR_MAX];
   45         struct sbc_softc *parent;
   46 };
   47 
   48 /* Here is the parameter structure per a device. */
   49 struct sbc_softc {
   50         device_t dev; /* device */
   51         device_t child_pcm, child_midi1, child_midi2;
   52 
   53         int io_rid[IO_MAX]; /* io port rids */
   54         struct resource *io[IO_MAX]; /* io port resources */
   55         int io_alloced[IO_MAX]; /* io port alloc flag */
   56 
   57         int irq_rid[IRQ_MAX]; /* irq rids */
   58         struct resource *irq[IRQ_MAX]; /* irq resources */
   59         int irq_alloced[IRQ_MAX]; /* irq alloc flag */
   60 
   61         int drq_rid[DRQ_MAX]; /* drq rids */
   62         struct resource *drq[DRQ_MAX]; /* drq resources */
   63         int drq_alloced[DRQ_MAX]; /* drq alloc flag */
   64 
   65         struct sbc_ihl ihl[IRQ_MAX];
   66 
   67         void *ih[IRQ_MAX];
   68 
   69         struct mtx *lock;
   70 
   71         u_int32_t bd_ver;
   72 };
   73 
   74 static int sbc_probe(device_t dev);
   75 static int sbc_attach(device_t dev);
   76 static void sbc_intr(void *p);
   77 
   78 static struct resource *sbc_alloc_resource(device_t bus, device_t child, int type, int *rid,
   79                                            u_long start, u_long end, u_long count, u_int flags);
   80 static int sbc_release_resource(device_t bus, device_t child, int type, int rid,
   81                                 struct resource *r);
   82 static int sbc_setup_intr(device_t dev, device_t child, struct resource *irq,
   83                int flags, driver_intr_t *intr, void *arg,
   84                void **cookiep);
   85 static int sbc_teardown_intr(device_t dev, device_t child, struct resource *irq,
   86                   void *cookie);
   87 
   88 static int alloc_resource(struct sbc_softc *scp);
   89 static int release_resource(struct sbc_softc *scp);
   90 
   91 static devclass_t sbc_devclass;
   92 
   93 static int io_range[3] = {0x10, 0x2, 0x4};
   94 
   95 #ifdef PC98 /* I/O address table for PC98 */
   96 static bus_addr_t pcm_iat[] = {
   97         0x000, 0x100, 0x200, 0x300, 0x400, 0x500, 0x600, 0x700,
   98         0x800, 0x900, 0xa00, 0xb00, 0xc00, 0xd00, 0xe00, 0xf00
   99 };
  100 static bus_addr_t midi_iat[] = {
  101         0x000, 0x100
  102 };
  103 static bus_addr_t opl_iat[] = {
  104         0x000, 0x100, 0x200, 0x300
  105 };
  106 static bus_addr_t *sb_iat[] = { pcm_iat, midi_iat, opl_iat };
  107 #endif
  108 
  109 static int sb_rd(struct resource *io, int reg);
  110 static void sb_wr(struct resource *io, int reg, u_int8_t val);
  111 static int sb_dspready(struct resource *io);
  112 static int sb_cmd(struct resource *io, u_char val);
  113 static u_int sb_get_byte(struct resource *io);
  114 static void sb_setmixer(struct resource *io, u_int port, u_int value);
  115 
  116 static void
  117 sbc_lockinit(struct sbc_softc *scp)
  118 {
  119         scp->lock = snd_mtxcreate(device_get_nameunit(scp->dev), "sound softc");
  120 }
  121 
  122 static void
  123 sbc_lockdestroy(struct sbc_softc *scp)
  124 {
  125         snd_mtxfree(scp->lock);
  126 }
  127 
  128 void
  129 sbc_lock(struct sbc_softc *scp)
  130 {
  131         snd_mtxlock(scp->lock);
  132 }
  133 
  134 void
  135 sbc_lockassert(struct sbc_softc *scp)
  136 {
  137         snd_mtxassert(scp->lock);
  138 }
  139 
  140 void
  141 sbc_unlock(struct sbc_softc *scp)
  142 {
  143         snd_mtxunlock(scp->lock);
  144 }
  145 
  146 static int
  147 sb_rd(struct resource *io, int reg)
  148 {
  149         return bus_space_read_1(rman_get_bustag(io),
  150                                 rman_get_bushandle(io),
  151                                 reg);
  152 }
  153 
  154 static void
  155 sb_wr(struct resource *io, int reg, u_int8_t val)
  156 {
  157         bus_space_write_1(rman_get_bustag(io),
  158                           rman_get_bushandle(io),
  159                           reg, val);
  160 }
  161 
  162 static int
  163 sb_dspready(struct resource *io)
  164 {
  165         return ((sb_rd(io, SBDSP_STATUS) & 0x80) == 0);
  166 }
  167 
  168 static int
  169 sb_dspwr(struct resource *io, u_char val)
  170 {
  171         int  i;
  172 
  173         for (i = 0; i < 1000; i++) {
  174                 if (sb_dspready(io)) {
  175                         sb_wr(io, SBDSP_CMD, val);
  176                         return 1;
  177                 }
  178                 if (i > 10) DELAY((i > 100)? 1000 : 10);
  179         }
  180         printf("sb_dspwr(0x%02x) timed out.\n", val);
  181         return 0;
  182 }
  183 
  184 static int
  185 sb_cmd(struct resource *io, u_char val)
  186 {
  187         return sb_dspwr(io, val);
  188 }
  189 
  190 static void
  191 sb_setmixer(struct resource *io, u_int port, u_int value)
  192 {
  193         u_long   flags;
  194 
  195         flags = spltty();
  196         sb_wr(io, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  197         DELAY(10);
  198         sb_wr(io, SB_MIX_DATA, (u_char) (value & 0xff));
  199         DELAY(10);
  200         splx(flags);
  201 }
  202 
  203 static u_int
  204 sb_get_byte(struct resource *io)
  205 {
  206         int i;
  207 
  208         for (i = 1000; i > 0; i--) {
  209                 if (sb_rd(io, DSP_DATA_AVAIL) & 0x80)
  210                         return sb_rd(io, DSP_READ);
  211                 else
  212                         DELAY(20);
  213         }
  214         return 0xffff;
  215 }
  216 
  217 static int
  218 sb_reset_dsp(struct resource *io)
  219 {
  220         sb_wr(io, SBDSP_RST, 3);
  221         DELAY(100);
  222         sb_wr(io, SBDSP_RST, 0);
  223         return (sb_get_byte(io) == 0xAA)? 0 : ENXIO;
  224 }
  225 
  226 static int
  227 sb_identify_board(struct resource *io)
  228 {
  229         int ver, essver, rev;
  230 
  231         sb_cmd(io, DSP_CMD_GETVER);     /* Get version */
  232         ver = (sb_get_byte(io) << 8) | sb_get_byte(io);
  233         if (ver < 0x100 || ver > 0x4ff) return 0;
  234         if (ver == 0x0301) {
  235                 /* Try to detect ESS chips. */
  236                 sb_cmd(io, DSP_CMD_GETID); /* Return ident. bytes. */
  237                 essver = (sb_get_byte(io) << 8) | sb_get_byte(io);
  238                 rev = essver & 0x000f;
  239                 essver &= 0xfff0;
  240                 if (essver == 0x4880) ver |= 0x1000;
  241                 else if (essver == 0x6880) ver = 0x0500 | rev;
  242         }
  243         return ver;
  244 }
  245 
  246 static struct isa_pnp_id sbc_ids[] = {
  247         {0x01008c0e, "Creative ViBRA16C"},              /* CTL0001 */
  248         {0x31008c0e, "Creative SB16/SB32"},             /* CTL0031 */
  249         {0x41008c0e, "Creative SB16/SB32"},             /* CTL0041 */
  250         {0x42008c0e, "Creative SB AWE64"},              /* CTL0042 */
  251         {0x43008c0e, "Creative ViBRA16X"},              /* CTL0043 */
  252         {0x44008c0e, "Creative SB AWE64 Gold"},         /* CTL0044 */
  253         {0x45008c0e, "Creative SB AWE64"},              /* CTL0045 */
  254         {0x46008c0e, "Creative SB AWE64"},              /* CTL0046 */
  255 
  256         {0x01000000, "Avance Logic ALS100+"},           /* @@@0001 - ViBRA16X clone */
  257         {0x01100000, "Avance Asound 110"},              /* @@@1001 */
  258         {0x01200000, "Avance Logic ALS120"},            /* @@@2001 - ViBRA16X clone */
  259 
  260         {0x81167316, "ESS ES1681"},                     /* ESS1681 */
  261         {0x02017316, "ESS ES1688"},                     /* ESS1688 */
  262         {0x68187316, "ESS ES1868"},                     /* ESS1868 */
  263         {0x03007316, "ESS ES1869"},                     /* ESS1869 */
  264         {0x69187316, "ESS ES1869"},                     /* ESS1869 */
  265         {0xabb0110e, "ESS ES1869 (Compaq OEM)"},        /* CPQb0ab */
  266         {0xacb0110e, "ESS ES1869 (Compaq OEM)"},        /* CPQb0ac */
  267         {0x78187316, "ESS ES1878"},                     /* ESS1878 */
  268         {0x79187316, "ESS ES1879"},                     /* ESS1879 */
  269         {0x88187316, "ESS ES1888"},                     /* ESS1888 */
  270         {0x07017316, "ESS ES1888 (DEC OEM)"},           /* ESS0107 */
  271         {0x06017316, "ESS ES1888 (Dell OEM)"},          /* ESS0106 */
  272         {0}
  273 };
  274 
  275 static int
  276 sbc_probe(device_t dev)
  277 {
  278         char *s = NULL;
  279         u_int32_t lid, vid;
  280 
  281         lid = isa_get_logicalid(dev);
  282         vid = isa_get_vendorid(dev);
  283         if (lid) {
  284                 if (lid == 0x01000000 && vid != 0x01009305) /* ALS0001 */
  285                         return ENXIO;
  286                 /* Check pnp ids */
  287                 return ISA_PNP_PROBE(device_get_parent(dev), dev, sbc_ids);
  288         } else {
  289                 int rid = 0, ver;
  290                 struct resource *io;
  291 
  292 #ifdef PC98
  293                 io = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
  294                                          pcm_iat, 16, RF_ACTIVE);
  295 #else
  296                 io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
  297                                         0, ~0, 16, RF_ACTIVE);
  298 #endif
  299                 if (!io) goto bad;
  300 #ifdef PC98
  301                 isa_load_resourcev(io, pcm_iat, 16);
  302 #endif
  303                 if (sb_reset_dsp(io)) goto bad2;
  304                 ver = sb_identify_board(io);
  305                 if (ver == 0) goto bad2;
  306                 switch ((ver & 0x00000f00) >> 8) {
  307                 case 1:
  308                         device_set_desc(dev, "SoundBlaster 1.0 (not supported)");
  309                         s = NULL;
  310                         break;
  311 
  312                 case 2:
  313                         s = "SoundBlaster 2.0";
  314                         break;
  315 
  316                 case 3:
  317                         s = (ver & 0x0000f000)? "ESS 488" : "SoundBlaster Pro";
  318                         break;
  319 
  320                 case 4:
  321                         s = "SoundBlaster 16";
  322                         break;
  323 
  324                 case 5:
  325                         s = (ver & 0x00000008)? "ESS 688" : "ESS 1688";
  326                         break;
  327                 }
  328                 if (s) device_set_desc(dev, s);
  329 bad2:           bus_release_resource(dev, SYS_RES_IOPORT, rid, io);
  330 bad:            return s? 0 : ENXIO;
  331         }
  332 }
  333 
  334 static int
  335 sbc_attach(device_t dev)
  336 {
  337         char *err = NULL;
  338         struct sbc_softc *scp;
  339         struct sndcard_func *func;
  340         u_int32_t logical_id = isa_get_logicalid(dev);
  341         int flags = device_get_flags(dev);
  342         int f, dh, dl, x, irq, i;
  343 
  344         if (!logical_id && (flags & DV_F_DUAL_DMA)) {
  345                 bus_set_resource(dev, SYS_RES_DRQ, 1,
  346                                  flags & DV_F_DRQ_MASK, 1);
  347         }
  348 
  349         scp = device_get_softc(dev);
  350         bzero(scp, sizeof(*scp));
  351         scp->dev = dev;
  352         sbc_lockinit(scp);
  353         err = "alloc_resource";
  354         if (alloc_resource(scp)) goto bad;
  355 
  356         err = "sb_reset_dsp";
  357         if (sb_reset_dsp(scp->io[0])) goto bad;
  358         err = "sb_identify_board";
  359         scp->bd_ver = sb_identify_board(scp->io[0]) & 0x00000fff;
  360         if (scp->bd_ver == 0) goto bad;
  361         f = 0;
  362         if (logical_id == 0x01200000 && scp->bd_ver < 0x0400) scp->bd_ver = 0x0499;
  363         switch ((scp->bd_ver & 0x0f00) >> 8) {
  364         case 1: /* old sound blaster has nothing... */
  365                 break;
  366 
  367         case 2:
  368                 f |= BD_F_DUP_MIDI;
  369                 if (scp->bd_ver > 0x200) f |= BD_F_MIX_CT1335;
  370                 break;
  371 
  372         case 5:
  373                 f |= BD_F_ESS;
  374                 scp->bd_ver = 0x0301;
  375         case 3:
  376                 f |= BD_F_DUP_MIDI | BD_F_MIX_CT1345;
  377                 break;
  378 
  379         case 4:
  380                 f |= BD_F_SB16 | BD_F_MIX_CT1745;
  381                 if (scp->drq[0]) dl = rman_get_start(scp->drq[0]); else dl = -1;
  382                 if (scp->drq[1]) dh = rman_get_start(scp->drq[1]); else dh = dl;
  383                 if (!logical_id && (dh < dl)) {
  384                         struct resource *r;
  385                         r = scp->drq[0];
  386                         scp->drq[0] = scp->drq[1];
  387                         scp->drq[1] = r;
  388                         dl = rman_get_start(scp->drq[0]);
  389                         dh = rman_get_start(scp->drq[1]);
  390                 }
  391                 /* soft irq/dma configuration */
  392                 x = -1;
  393                 irq = rman_get_start(scp->irq[0]);
  394 #ifdef PC98
  395                 /* SB16 in PC98 use different IRQ table */
  396                 if      (irq == 3) x = 1;
  397                 else if (irq == 5) x = 8;
  398                 else if (irq == 10) x = 2;
  399                 else if (irq == 12) x = 4;
  400                 if (x == -1) {
  401                         err = "bad irq (3/5/10/12 valid)";
  402                         goto bad;
  403                 }
  404                 else sb_setmixer(scp->io[0], IRQ_NR, x);
  405                 /* SB16 in PC98 use different dma setting */
  406                 sb_setmixer(scp->io[0], DMA_NR, dh == 0 ? 1 : 2);
  407 #else
  408                 if      (irq == 5) x = 2;
  409                 else if (irq == 7) x = 4;
  410                 else if (irq == 9) x = 1;
  411                 else if (irq == 10) x = 8;
  412                 if (x == -1) {
  413                         err = "bad irq (5/7/9/10 valid)";
  414                         goto bad;
  415                 }
  416                 else sb_setmixer(scp->io[0], IRQ_NR, x);
  417                 sb_setmixer(scp->io[0], DMA_NR, (1 << dh) | (1 << dl));
  418 #endif
  419                 if (bootverbose) {
  420                         device_printf(dev, "setting card to irq %d, drq %d", irq, dl);
  421                         if (dl != dh) printf(", %d", dh);
  422                         printf("\n");
  423                 }
  424                 break;
  425         }
  426 
  427         switch (logical_id) {
  428         case 0x43008c0e:        /* CTL0043 */
  429         case 0x01200000:
  430         case 0x01000000:
  431                 f |= BD_F_SB16X;
  432                 break;
  433         }
  434         scp->bd_ver |= f << 16;
  435 
  436         err = "setup_intr";
  437         for (i = 0; i < IRQ_MAX; i++) {
  438                 scp->ihl[i].parent = scp;
  439                 if (snd_setup_intr(dev, scp->irq[i], 0, sbc_intr, &scp->ihl[i], &scp->ih[i]))
  440                         goto bad;
  441         }
  442 
  443         /* PCM Audio */
  444         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  445         if (func == NULL) goto bad;
  446         func->func = SCF_PCM;
  447         scp->child_pcm = device_add_child(dev, "pcm", -1);
  448         device_set_ivars(scp->child_pcm, func);
  449 
  450         /* Midi Interface */
  451         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  452         if (func == NULL) goto bad;
  453         func->func = SCF_MIDI;
  454         scp->child_midi1 = device_add_child(dev, "midi", -1);
  455         device_set_ivars(scp->child_midi1, func);
  456 
  457         /* OPL FM Synthesizer */
  458         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  459         if (func == NULL) goto bad;
  460         func->func = SCF_SYNTH;
  461         scp->child_midi2 = device_add_child(dev, "midi", -1);
  462         device_set_ivars(scp->child_midi2, func);
  463 
  464         /* probe/attach kids */
  465         bus_generic_attach(dev);
  466 
  467         return (0);
  468 
  469 bad:    if (err) device_printf(dev, "%s\n", err);
  470         release_resource(scp);
  471         return (ENXIO);
  472 }
  473 
  474 static int
  475 sbc_detach(device_t dev)
  476 {
  477         struct sbc_softc *scp = device_get_softc(dev);
  478 
  479         sbc_lock(scp);
  480         device_delete_child(dev, scp->child_midi2);
  481         device_delete_child(dev, scp->child_midi1);
  482         device_delete_child(dev, scp->child_pcm);
  483         release_resource(scp);
  484         sbc_lockdestroy(scp);
  485         return bus_generic_detach(dev);
  486 }
  487 
  488 static void
  489 sbc_intr(void *p)
  490 {
  491         struct sbc_ihl *ihl = p;
  492         int i;
  493 
  494         /* sbc_lock(ihl->parent); */
  495         i = 0;
  496         while (i < INTR_MAX) {
  497                 if (ihl->intr[i] != NULL) ihl->intr[i](ihl->intr_arg[i]);
  498                 i++;
  499         }
  500         /* sbc_unlock(ihl->parent); */
  501 }
  502 
  503 static int
  504 sbc_setup_intr(device_t dev, device_t child, struct resource *irq,
  505                int flags, driver_intr_t *intr, void *arg,
  506                void **cookiep)
  507 {
  508         struct sbc_softc *scp = device_get_softc(dev);
  509         struct sbc_ihl *ihl = NULL;
  510         int i, ret;
  511 
  512         sbc_lock(scp);
  513         i = 0;
  514         while (i < IRQ_MAX) {
  515                 if (irq == scp->irq[i]) ihl = &scp->ihl[i];
  516                 i++;
  517         }
  518         ret = 0;
  519         if (ihl == NULL) ret = EINVAL;
  520         i = 0;
  521         while ((ret == 0) && (i < INTR_MAX)) {
  522                 if (ihl->intr[i] == NULL) {
  523                         ihl->intr[i] = intr;
  524                         ihl->intr_arg[i] = arg;
  525                         *cookiep = &ihl->intr[i];
  526                         ret = -1;
  527                 } else i++;
  528         }
  529         sbc_unlock(scp);
  530         return (ret > 0)? EINVAL : 0;
  531 }
  532 
  533 static int
  534 sbc_teardown_intr(device_t dev, device_t child, struct resource *irq,
  535                   void *cookie)
  536 {
  537         struct sbc_softc *scp = device_get_softc(dev);
  538         struct sbc_ihl *ihl = NULL;
  539         int i, ret;
  540 
  541         sbc_lock(scp);
  542         i = 0;
  543         while (i < IRQ_MAX) {
  544                 if (irq == scp->irq[i]) ihl = &scp->ihl[i];
  545                 i++;
  546         }
  547         ret = 0;
  548         if (ihl == NULL) ret = EINVAL;
  549         i = 0;
  550         while ((ret == 0) && (i < INTR_MAX)) {
  551                 if (cookie == &ihl->intr[i]) {
  552                         ihl->intr[i] = NULL;
  553                         ihl->intr_arg[i] = NULL;
  554                         return 0;
  555                 } else i++;
  556         }
  557         sbc_unlock(scp);
  558         return (ret > 0)? EINVAL : 0;
  559 }
  560 
  561 static struct resource *
  562 sbc_alloc_resource(device_t bus, device_t child, int type, int *rid,
  563                       u_long start, u_long end, u_long count, u_int flags)
  564 {
  565         struct sbc_softc *scp;
  566         int *alloced, rid_max, alloced_max;
  567         struct resource **res;
  568 #ifdef PC98
  569         int i;
  570 #endif
  571 
  572         scp = device_get_softc(bus);
  573         switch (type) {
  574         case SYS_RES_IOPORT:
  575                 alloced = scp->io_alloced;
  576                 res = scp->io;
  577 #ifdef PC98
  578                 rid_max = 0;
  579                 for (i = 0; i < IO_MAX; i++)
  580                         rid_max += io_range[i];
  581 #else
  582                 rid_max = IO_MAX - 1;
  583 #endif
  584                 alloced_max = 1;
  585                 break;
  586         case SYS_RES_DRQ:
  587                 alloced = scp->drq_alloced;
  588                 res = scp->drq;
  589                 rid_max = DRQ_MAX - 1;
  590                 alloced_max = 1;
  591                 break;
  592         case SYS_RES_IRQ:
  593                 alloced = scp->irq_alloced;
  594                 res = scp->irq;
  595                 rid_max = IRQ_MAX - 1;
  596                 alloced_max = INTR_MAX; /* pcm and mpu may share the irq. */
  597                 break;
  598         default:
  599                 return (NULL);
  600         }
  601 
  602         if (*rid > rid_max || alloced[*rid] == alloced_max)
  603                 return (NULL);
  604 
  605         alloced[*rid]++;
  606         return (res[*rid]);
  607 }
  608 
  609 static int
  610 sbc_release_resource(device_t bus, device_t child, int type, int rid,
  611                         struct resource *r)
  612 {
  613         struct sbc_softc *scp;
  614         int *alloced, rid_max;
  615 
  616         scp = device_get_softc(bus);
  617         switch (type) {
  618         case SYS_RES_IOPORT:
  619                 alloced = scp->io_alloced;
  620                 rid_max = IO_MAX - 1;
  621                 break;
  622         case SYS_RES_DRQ:
  623                 alloced = scp->drq_alloced;
  624                 rid_max = DRQ_MAX - 1;
  625                 break;
  626         case SYS_RES_IRQ:
  627                 alloced = scp->irq_alloced;
  628                 rid_max = IRQ_MAX - 1;
  629                 break;
  630         default:
  631                 return (1);
  632         }
  633 
  634         if (rid > rid_max || alloced[rid] == 0)
  635                 return (1);
  636 
  637         alloced[rid]--;
  638         return (0);
  639 }
  640 
  641 static int
  642 sbc_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
  643 {
  644         struct sbc_softc *scp = device_get_softc(bus);
  645         struct sndcard_func *func = device_get_ivars(dev);
  646 
  647         switch (index) {
  648         case 0:
  649                 *result = func->func;
  650                 break;
  651 
  652         case 1:
  653                 *result = scp->bd_ver;
  654                 break;
  655 
  656         default:
  657                 return ENOENT;
  658         }
  659 
  660         return 0;
  661 }
  662 
  663 static int
  664 sbc_write_ivar(device_t bus, device_t dev,
  665                int index, uintptr_t value)
  666 {
  667         switch (index) {
  668         case 0:
  669         case 1:
  670                 return EINVAL;
  671 
  672         default:
  673                 return (ENOENT);
  674         }
  675 }
  676 
  677 static int
  678 alloc_resource(struct sbc_softc *scp)
  679 {
  680         int i;
  681 
  682         for (i = 0 ; i < IO_MAX ; i++) {
  683                 if (scp->io[i] == NULL) {
  684 #ifdef PC98
  685                         scp->io_rid[i] = i > 0 ?
  686                                 scp->io_rid[i - 1] + io_range[i - 1] : 0;
  687                         scp->io[i] = isa_alloc_resourcev(scp->dev,
  688                                                          SYS_RES_IOPORT,
  689                                                          &scp->io_rid[i],
  690                                                          sb_iat[i],
  691                                                          io_range[i],
  692                                                          RF_ACTIVE);
  693                         if (scp->io[i] != NULL)
  694                                 isa_load_resourcev(scp->io[i], sb_iat[i],
  695                                                    io_range[i]);
  696 #else
  697                         scp->io_rid[i] = i;
  698                         scp->io[i] = bus_alloc_resource(scp->dev, SYS_RES_IOPORT, &scp->io_rid[i],
  699                                                         0, ~0, io_range[i], RF_ACTIVE);
  700 #endif
  701                         if (i == 0 && scp->io[i] == NULL)
  702                                 return (1);
  703                         scp->io_alloced[i] = 0;
  704                 }
  705         }
  706         for (i = 0 ; i < DRQ_MAX ; i++) {
  707                 if (scp->drq[i] == NULL) {
  708                         scp->drq_rid[i] = i;
  709                         scp->drq[i] = bus_alloc_resource_any(scp->dev,
  710                                                              SYS_RES_DRQ,
  711                                                              &scp->drq_rid[i],
  712                                                              RF_ACTIVE);
  713                         if (i == 0 && scp->drq[i] == NULL)
  714                                 return (1);
  715                         scp->drq_alloced[i] = 0;
  716                 }
  717         }
  718         for (i = 0 ; i < IRQ_MAX ; i++) {
  719                 if (scp->irq[i] == NULL) {
  720                         scp->irq_rid[i] = i;
  721                         scp->irq[i] = bus_alloc_resource_any(scp->dev,
  722                                                              SYS_RES_IRQ,
  723                                                              &scp->irq_rid[i],
  724                                                              RF_ACTIVE);
  725                         if (i == 0 && scp->irq[i] == NULL)
  726                                 return (1);
  727                         scp->irq_alloced[i] = 0;
  728                 }
  729         }
  730         return (0);
  731 }
  732 
  733 static int
  734 release_resource(struct sbc_softc *scp)
  735 {
  736         int i;
  737 
  738         for (i = 0 ; i < IO_MAX ; i++) {
  739                 if (scp->io[i] != NULL) {
  740                         bus_release_resource(scp->dev, SYS_RES_IOPORT, scp->io_rid[i], scp->io[i]);
  741                         scp->io[i] = NULL;
  742                 }
  743         }
  744         for (i = 0 ; i < DRQ_MAX ; i++) {
  745                 if (scp->drq[i] != NULL) {
  746                         bus_release_resource(scp->dev, SYS_RES_DRQ, scp->drq_rid[i], scp->drq[i]);
  747                         scp->drq[i] = NULL;
  748                 }
  749         }
  750         for (i = 0 ; i < IRQ_MAX ; i++) {
  751                 if (scp->irq[i] != NULL) {
  752                         if (scp->ih[i] != NULL)
  753                                 bus_teardown_intr(scp->dev, scp->irq[i], scp->ih[i]);
  754                         scp->ih[i] = NULL;
  755                         bus_release_resource(scp->dev, SYS_RES_IRQ, scp->irq_rid[i], scp->irq[i]);
  756                         scp->irq[i] = NULL;
  757                 }
  758         }
  759         return (0);
  760 }
  761 
  762 static device_method_t sbc_methods[] = {
  763         /* Device interface */
  764         DEVMETHOD(device_probe,         sbc_probe),
  765         DEVMETHOD(device_attach,        sbc_attach),
  766         DEVMETHOD(device_detach,        sbc_detach),
  767         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  768         DEVMETHOD(device_suspend,       bus_generic_suspend),
  769         DEVMETHOD(device_resume,        bus_generic_resume),
  770 
  771         /* Bus interface */
  772         DEVMETHOD(bus_read_ivar,        sbc_read_ivar),
  773         DEVMETHOD(bus_write_ivar,       sbc_write_ivar),
  774         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  775         DEVMETHOD(bus_alloc_resource,   sbc_alloc_resource),
  776         DEVMETHOD(bus_release_resource, sbc_release_resource),
  777         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  778         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  779         DEVMETHOD(bus_setup_intr,       sbc_setup_intr),
  780         DEVMETHOD(bus_teardown_intr,    sbc_teardown_intr),
  781 
  782         { 0, 0 }
  783 };
  784 
  785 static driver_t sbc_driver = {
  786         "sbc",
  787         sbc_methods,
  788         sizeof(struct sbc_softc),
  789 };
  790 
  791 /* sbc can be attached to an isa bus. */
  792 DRIVER_MODULE(snd_sbc, isa, sbc_driver, sbc_devclass, 0, 0);
  793 DRIVER_MODULE(snd_sbc, acpi, sbc_driver, sbc_devclass, 0, 0);
  794 MODULE_DEPEND(snd_sbc, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
  795 MODULE_VERSION(snd_sbc, 1);

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