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/7.3/sys/dev/sound/isa/sbc.c 167608 2007-03-15 16:41:27Z ariff $");
   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,
   84 #if __FreeBSD_version >= 700031
   85                driver_filter_t *filter,
   86 #endif
   87                driver_intr_t *intr, 
   88                void *arg, void **cookiep);
   89 static int sbc_teardown_intr(device_t dev, device_t child, struct resource *irq,
   90                   void *cookie);
   91 
   92 static int alloc_resource(struct sbc_softc *scp);
   93 static int release_resource(struct sbc_softc *scp);
   94 
   95 static devclass_t sbc_devclass;
   96 
   97 static int io_range[3] = {0x10, 0x2, 0x4};
   98 
   99 #ifdef PC98 /* I/O address table for PC98 */
  100 static bus_addr_t pcm_iat[] = {
  101         0x000, 0x100, 0x200, 0x300, 0x400, 0x500, 0x600, 0x700,
  102         0x800, 0x900, 0xa00, 0xb00, 0xc00, 0xd00, 0xe00, 0xf00
  103 };
  104 static bus_addr_t midi_iat[] = {
  105         0x000, 0x100
  106 };
  107 static bus_addr_t opl_iat[] = {
  108         0x000, 0x100, 0x200, 0x300
  109 };
  110 static bus_addr_t *sb_iat[] = { pcm_iat, midi_iat, opl_iat };
  111 #endif
  112 
  113 static int sb_rd(struct resource *io, int reg);
  114 static void sb_wr(struct resource *io, int reg, u_int8_t val);
  115 static int sb_dspready(struct resource *io);
  116 static int sb_cmd(struct resource *io, u_char val);
  117 static u_int sb_get_byte(struct resource *io);
  118 static void sb_setmixer(struct resource *io, u_int port, u_int value);
  119 
  120 static void
  121 sbc_lockinit(struct sbc_softc *scp)
  122 {
  123         scp->lock = snd_mtxcreate(device_get_nameunit(scp->dev),
  124             "snd_sbc softc");
  125 }
  126 
  127 static void
  128 sbc_lockdestroy(struct sbc_softc *scp)
  129 {
  130         snd_mtxfree(scp->lock);
  131 }
  132 
  133 void
  134 sbc_lock(struct sbc_softc *scp)
  135 {
  136         snd_mtxlock(scp->lock);
  137 }
  138 
  139 void
  140 sbc_lockassert(struct sbc_softc *scp)
  141 {
  142         snd_mtxassert(scp->lock);
  143 }
  144 
  145 void
  146 sbc_unlock(struct sbc_softc *scp)
  147 {
  148         snd_mtxunlock(scp->lock);
  149 }
  150 
  151 static int
  152 sb_rd(struct resource *io, int reg)
  153 {
  154         return bus_space_read_1(rman_get_bustag(io),
  155                                 rman_get_bushandle(io),
  156                                 reg);
  157 }
  158 
  159 static void
  160 sb_wr(struct resource *io, int reg, u_int8_t val)
  161 {
  162         bus_space_write_1(rman_get_bustag(io),
  163                           rman_get_bushandle(io),
  164                           reg, val);
  165 }
  166 
  167 static int
  168 sb_dspready(struct resource *io)
  169 {
  170         return ((sb_rd(io, SBDSP_STATUS) & 0x80) == 0);
  171 }
  172 
  173 static int
  174 sb_dspwr(struct resource *io, u_char val)
  175 {
  176         int  i;
  177 
  178         for (i = 0; i < 1000; i++) {
  179                 if (sb_dspready(io)) {
  180                         sb_wr(io, SBDSP_CMD, val);
  181                         return 1;
  182                 }
  183                 if (i > 10) DELAY((i > 100)? 1000 : 10);
  184         }
  185         printf("sb_dspwr(0x%02x) timed out.\n", val);
  186         return 0;
  187 }
  188 
  189 static int
  190 sb_cmd(struct resource *io, u_char val)
  191 {
  192         return sb_dspwr(io, val);
  193 }
  194 
  195 static void
  196 sb_setmixer(struct resource *io, u_int port, u_int value)
  197 {
  198         u_long   flags;
  199 
  200         flags = spltty();
  201         sb_wr(io, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  202         DELAY(10);
  203         sb_wr(io, SB_MIX_DATA, (u_char) (value & 0xff));
  204         DELAY(10);
  205         splx(flags);
  206 }
  207 
  208 static u_int
  209 sb_get_byte(struct resource *io)
  210 {
  211         int i;
  212 
  213         for (i = 1000; i > 0; i--) {
  214                 if (sb_rd(io, DSP_DATA_AVAIL) & 0x80)
  215                         return sb_rd(io, DSP_READ);
  216                 else
  217                         DELAY(20);
  218         }
  219         return 0xffff;
  220 }
  221 
  222 static int
  223 sb_reset_dsp(struct resource *io)
  224 {
  225         sb_wr(io, SBDSP_RST, 3);
  226         DELAY(100);
  227         sb_wr(io, SBDSP_RST, 0);
  228         return (sb_get_byte(io) == 0xAA)? 0 : ENXIO;
  229 }
  230 
  231 static int
  232 sb_identify_board(struct resource *io)
  233 {
  234         int ver, essver, rev;
  235 
  236         sb_cmd(io, DSP_CMD_GETVER);     /* Get version */
  237         ver = (sb_get_byte(io) << 8) | sb_get_byte(io);
  238         if (ver < 0x100 || ver > 0x4ff) return 0;
  239         if (ver == 0x0301) {
  240                 /* Try to detect ESS chips. */
  241                 sb_cmd(io, DSP_CMD_GETID); /* Return ident. bytes. */
  242                 essver = (sb_get_byte(io) << 8) | sb_get_byte(io);
  243                 rev = essver & 0x000f;
  244                 essver &= 0xfff0;
  245                 if (essver == 0x4880) ver |= 0x1000;
  246                 else if (essver == 0x6880) ver = 0x0500 | rev;
  247         }
  248         return ver;
  249 }
  250 
  251 static struct isa_pnp_id sbc_ids[] = {
  252         {0x01008c0e, "Creative ViBRA16C"},              /* CTL0001 */
  253         {0x31008c0e, "Creative SB16/SB32"},             /* CTL0031 */
  254         {0x41008c0e, "Creative SB16/SB32"},             /* CTL0041 */
  255         {0x42008c0e, "Creative SB AWE64"},              /* CTL0042 */
  256         {0x43008c0e, "Creative ViBRA16X"},              /* CTL0043 */
  257         {0x44008c0e, "Creative SB AWE64 Gold"},         /* CTL0044 */
  258         {0x45008c0e, "Creative SB AWE64"},              /* CTL0045 */
  259         {0x46008c0e, "Creative SB AWE64"},              /* CTL0046 */
  260 
  261         {0x01000000, "Avance Logic ALS100+"},           /* @@@0001 - ViBRA16X clone */
  262         {0x01100000, "Avance Asound 110"},              /* @@@1001 */
  263         {0x01200000, "Avance Logic ALS120"},            /* @@@2001 - ViBRA16X clone */
  264 
  265         {0x81167316, "ESS ES1681"},                     /* ESS1681 */
  266         {0x02017316, "ESS ES1688"},                     /* ESS1688 */
  267         {0x68097316, "ESS ES1688"},                     /* ESS1688 */
  268         {0x68187316, "ESS ES1868"},                     /* ESS1868 */
  269         {0x03007316, "ESS ES1869"},                     /* ESS1869 */
  270         {0x69187316, "ESS ES1869"},                     /* ESS1869 */
  271         {0xabb0110e, "ESS ES1869 (Compaq OEM)"},        /* CPQb0ab */
  272         {0xacb0110e, "ESS ES1869 (Compaq OEM)"},        /* CPQb0ac */
  273         {0x78187316, "ESS ES1878"},                     /* ESS1878 */
  274         {0x79187316, "ESS ES1879"},                     /* ESS1879 */
  275         {0x88187316, "ESS ES1888"},                     /* ESS1888 */
  276         {0x07017316, "ESS ES1888 (DEC OEM)"},           /* ESS0107 */
  277         {0x06017316, "ESS ES1888 (Dell OEM)"},          /* ESS0106 */
  278         {0}
  279 };
  280 
  281 static int
  282 sbc_probe(device_t dev)
  283 {
  284         char *s = NULL;
  285         u_int32_t lid, vid;
  286 
  287         lid = isa_get_logicalid(dev);
  288         vid = isa_get_vendorid(dev);
  289         if (lid) {
  290                 if (lid == 0x01000000 && vid != 0x01009305) /* ALS0001 */
  291                         return ENXIO;
  292                 /* Check pnp ids */
  293                 return ISA_PNP_PROBE(device_get_parent(dev), dev, sbc_ids);
  294         } else {
  295                 int rid = 0, ver;
  296                 struct resource *io;
  297 
  298 #ifdef PC98
  299                 io = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
  300                                          pcm_iat, 16, RF_ACTIVE);
  301 #else
  302                 io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
  303                                         0, ~0, 16, RF_ACTIVE);
  304 #endif
  305                 if (!io) goto bad;
  306 #ifdef PC98
  307                 isa_load_resourcev(io, pcm_iat, 16);
  308 #endif
  309                 if (sb_reset_dsp(io)) goto bad2;
  310                 ver = sb_identify_board(io);
  311                 if (ver == 0) goto bad2;
  312                 switch ((ver & 0x00000f00) >> 8) {
  313                 case 1:
  314                         device_set_desc(dev, "SoundBlaster 1.0 (not supported)");
  315                         s = NULL;
  316                         break;
  317 
  318                 case 2:
  319                         s = "SoundBlaster 2.0";
  320                         break;
  321 
  322                 case 3:
  323                         s = (ver & 0x0000f000)? "ESS 488" : "SoundBlaster Pro";
  324                         break;
  325 
  326                 case 4:
  327                         s = "SoundBlaster 16";
  328                         break;
  329 
  330                 case 5:
  331                         s = (ver & 0x00000008)? "ESS 688" : "ESS 1688";
  332                         break;
  333                 }
  334                 if (s) device_set_desc(dev, s);
  335 bad2:           bus_release_resource(dev, SYS_RES_IOPORT, rid, io);
  336 bad:            return s? 0 : ENXIO;
  337         }
  338 }
  339 
  340 static int
  341 sbc_attach(device_t dev)
  342 {
  343         char *err = NULL;
  344         struct sbc_softc *scp;
  345         struct sndcard_func *func;
  346         u_int32_t logical_id = isa_get_logicalid(dev);
  347         int flags = device_get_flags(dev);
  348         int f, dh, dl, x, irq, i;
  349 
  350         if (!logical_id && (flags & DV_F_DUAL_DMA)) {
  351                 bus_set_resource(dev, SYS_RES_DRQ, 1,
  352                                  flags & DV_F_DRQ_MASK, 1);
  353         }
  354 
  355         scp = device_get_softc(dev);
  356         bzero(scp, sizeof(*scp));
  357         scp->dev = dev;
  358         sbc_lockinit(scp);
  359         err = "alloc_resource";
  360         if (alloc_resource(scp)) goto bad;
  361 
  362         err = "sb_reset_dsp";
  363         if (sb_reset_dsp(scp->io[0])) goto bad;
  364         err = "sb_identify_board";
  365         scp->bd_ver = sb_identify_board(scp->io[0]) & 0x00000fff;
  366         if (scp->bd_ver == 0) goto bad;
  367         f = 0;
  368         if (logical_id == 0x01200000 && scp->bd_ver < 0x0400) scp->bd_ver = 0x0499;
  369         switch ((scp->bd_ver & 0x0f00) >> 8) {
  370         case 1: /* old sound blaster has nothing... */
  371                 break;
  372 
  373         case 2:
  374                 f |= BD_F_DUP_MIDI;
  375                 if (scp->bd_ver > 0x200) f |= BD_F_MIX_CT1335;
  376                 break;
  377 
  378         case 5:
  379                 f |= BD_F_ESS;
  380                 scp->bd_ver = 0x0301;
  381         case 3:
  382                 f |= BD_F_DUP_MIDI | BD_F_MIX_CT1345;
  383                 break;
  384 
  385         case 4:
  386                 f |= BD_F_SB16 | BD_F_MIX_CT1745;
  387                 if (scp->drq[0]) dl = rman_get_start(scp->drq[0]); else dl = -1;
  388                 if (scp->drq[1]) dh = rman_get_start(scp->drq[1]); else dh = dl;
  389                 if (!logical_id && (dh < dl)) {
  390                         struct resource *r;
  391                         r = scp->drq[0];
  392                         scp->drq[0] = scp->drq[1];
  393                         scp->drq[1] = r;
  394                         dl = rman_get_start(scp->drq[0]);
  395                         dh = rman_get_start(scp->drq[1]);
  396                 }
  397                 /* soft irq/dma configuration */
  398                 x = -1;
  399                 irq = rman_get_start(scp->irq[0]);
  400 #ifdef PC98
  401                 /* SB16 in PC98 use different IRQ table */
  402                 if      (irq == 3) x = 1;
  403                 else if (irq == 5) x = 8;
  404                 else if (irq == 10) x = 2;
  405                 else if (irq == 12) x = 4;
  406                 if (x == -1) {
  407                         err = "bad irq (3/5/10/12 valid)";
  408                         goto bad;
  409                 }
  410                 else sb_setmixer(scp->io[0], IRQ_NR, x);
  411                 /* SB16 in PC98 use different dma setting */
  412                 sb_setmixer(scp->io[0], DMA_NR, dh == 0 ? 1 : 2);
  413 #else
  414                 if      (irq == 5) x = 2;
  415                 else if (irq == 7) x = 4;
  416                 else if (irq == 9) x = 1;
  417                 else if (irq == 10) x = 8;
  418                 if (x == -1) {
  419                         err = "bad irq (5/7/9/10 valid)";
  420                         goto bad;
  421                 }
  422                 else sb_setmixer(scp->io[0], IRQ_NR, x);
  423                 sb_setmixer(scp->io[0], DMA_NR, (1 << dh) | (1 << dl));
  424 #endif
  425                 if (bootverbose) {
  426                         device_printf(dev, "setting card to irq %d, drq %d", irq, dl);
  427                         if (dl != dh) printf(", %d", dh);
  428                         printf("\n");
  429                 }
  430                 break;
  431         }
  432 
  433         switch (logical_id) {
  434         case 0x43008c0e:        /* CTL0043 */
  435         case 0x01200000:
  436         case 0x01000000:
  437                 f |= BD_F_SB16X;
  438                 break;
  439         }
  440         scp->bd_ver |= f << 16;
  441 
  442         err = "setup_intr";
  443         for (i = 0; i < IRQ_MAX; i++) {
  444                 scp->ihl[i].parent = scp;
  445                 if (snd_setup_intr(dev, scp->irq[i], 0, sbc_intr, &scp->ihl[i], &scp->ih[i]))
  446                         goto bad;
  447         }
  448 
  449         /* PCM Audio */
  450         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  451         if (func == NULL) goto bad;
  452         func->func = SCF_PCM;
  453         scp->child_pcm = device_add_child(dev, "pcm", -1);
  454         device_set_ivars(scp->child_pcm, func);
  455 
  456         /* Midi Interface */
  457         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  458         if (func == NULL) goto bad;
  459         func->func = SCF_MIDI;
  460         scp->child_midi1 = device_add_child(dev, "midi", -1);
  461         device_set_ivars(scp->child_midi1, func);
  462 
  463         /* OPL FM Synthesizer */
  464         func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
  465         if (func == NULL) goto bad;
  466         func->func = SCF_SYNTH;
  467         scp->child_midi2 = device_add_child(dev, "midi", -1);
  468         device_set_ivars(scp->child_midi2, func);
  469 
  470         /* probe/attach kids */
  471         bus_generic_attach(dev);
  472 
  473         return (0);
  474 
  475 bad:    if (err) device_printf(dev, "%s\n", err);
  476         release_resource(scp);
  477         return (ENXIO);
  478 }
  479 
  480 static int
  481 sbc_detach(device_t dev)
  482 {
  483         struct sbc_softc *scp = device_get_softc(dev);
  484 
  485         sbc_lock(scp);
  486         device_delete_child(dev, scp->child_midi2);
  487         device_delete_child(dev, scp->child_midi1);
  488         device_delete_child(dev, scp->child_pcm);
  489         release_resource(scp);
  490         sbc_lockdestroy(scp);
  491         return bus_generic_detach(dev);
  492 }
  493 
  494 static void
  495 sbc_intr(void *p)
  496 {
  497         struct sbc_ihl *ihl = p;
  498         int i;
  499 
  500         /* sbc_lock(ihl->parent); */
  501         i = 0;
  502         while (i < INTR_MAX) {
  503                 if (ihl->intr[i] != NULL) ihl->intr[i](ihl->intr_arg[i]);
  504                 i++;
  505         }
  506         /* sbc_unlock(ihl->parent); */
  507 }
  508 
  509 static int
  510 sbc_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
  511 #if __FreeBSD_version >= 700031
  512                driver_filter_t *filter,
  513 #endif
  514                driver_intr_t *intr, 
  515                void *arg, void **cookiep)
  516 {
  517         struct sbc_softc *scp = device_get_softc(dev);
  518         struct sbc_ihl *ihl = NULL;
  519         int i, ret;
  520 
  521 #if __FreeBSD_version >= 700031
  522         if (filter != NULL) {
  523                 printf("sbc.c: we cannot use a filter here\n");
  524                 return (EINVAL);
  525         }
  526 #endif
  527         sbc_lock(scp);
  528         i = 0;
  529         while (i < IRQ_MAX) {
  530                 if (irq == scp->irq[i]) ihl = &scp->ihl[i];
  531                 i++;
  532         }
  533         ret = 0;
  534         if (ihl == NULL) ret = EINVAL;
  535         i = 0;
  536         while ((ret == 0) && (i < INTR_MAX)) {
  537                 if (ihl->intr[i] == NULL) {
  538                         ihl->intr[i] = intr;
  539                         ihl->intr_arg[i] = arg;
  540                         *cookiep = &ihl->intr[i];
  541                         ret = -1;
  542                 } else i++;
  543         }
  544         sbc_unlock(scp);
  545         return (ret > 0)? EINVAL : 0;
  546 }
  547 
  548 static int
  549 sbc_teardown_intr(device_t dev, device_t child, struct resource *irq,
  550                   void *cookie)
  551 {
  552         struct sbc_softc *scp = device_get_softc(dev);
  553         struct sbc_ihl *ihl = NULL;
  554         int i, ret;
  555 
  556         sbc_lock(scp);
  557         i = 0;
  558         while (i < IRQ_MAX) {
  559                 if (irq == scp->irq[i]) ihl = &scp->ihl[i];
  560                 i++;
  561         }
  562         ret = 0;
  563         if (ihl == NULL) ret = EINVAL;
  564         i = 0;
  565         while ((ret == 0) && (i < INTR_MAX)) {
  566                 if (cookie == &ihl->intr[i]) {
  567                         ihl->intr[i] = NULL;
  568                         ihl->intr_arg[i] = NULL;
  569                         return 0;
  570                 } else i++;
  571         }
  572         sbc_unlock(scp);
  573         return (ret > 0)? EINVAL : 0;
  574 }
  575 
  576 static struct resource *
  577 sbc_alloc_resource(device_t bus, device_t child, int type, int *rid,
  578                       u_long start, u_long end, u_long count, u_int flags)
  579 {
  580         struct sbc_softc *scp;
  581         int *alloced, rid_max, alloced_max;
  582         struct resource **res;
  583 #ifdef PC98
  584         int i;
  585 #endif
  586 
  587         scp = device_get_softc(bus);
  588         switch (type) {
  589         case SYS_RES_IOPORT:
  590                 alloced = scp->io_alloced;
  591                 res = scp->io;
  592 #ifdef PC98
  593                 rid_max = 0;
  594                 for (i = 0; i < IO_MAX; i++)
  595                         rid_max += io_range[i];
  596 #else
  597                 rid_max = IO_MAX - 1;
  598 #endif
  599                 alloced_max = 1;
  600                 break;
  601         case SYS_RES_DRQ:
  602                 alloced = scp->drq_alloced;
  603                 res = scp->drq;
  604                 rid_max = DRQ_MAX - 1;
  605                 alloced_max = 1;
  606                 break;
  607         case SYS_RES_IRQ:
  608                 alloced = scp->irq_alloced;
  609                 res = scp->irq;
  610                 rid_max = IRQ_MAX - 1;
  611                 alloced_max = INTR_MAX; /* pcm and mpu may share the irq. */
  612                 break;
  613         default:
  614                 return (NULL);
  615         }
  616 
  617         if (*rid > rid_max || alloced[*rid] == alloced_max)
  618                 return (NULL);
  619 
  620         alloced[*rid]++;
  621         return (res[*rid]);
  622 }
  623 
  624 static int
  625 sbc_release_resource(device_t bus, device_t child, int type, int rid,
  626                         struct resource *r)
  627 {
  628         struct sbc_softc *scp;
  629         int *alloced, rid_max;
  630 
  631         scp = device_get_softc(bus);
  632         switch (type) {
  633         case SYS_RES_IOPORT:
  634                 alloced = scp->io_alloced;
  635                 rid_max = IO_MAX - 1;
  636                 break;
  637         case SYS_RES_DRQ:
  638                 alloced = scp->drq_alloced;
  639                 rid_max = DRQ_MAX - 1;
  640                 break;
  641         case SYS_RES_IRQ:
  642                 alloced = scp->irq_alloced;
  643                 rid_max = IRQ_MAX - 1;
  644                 break;
  645         default:
  646                 return (1);
  647         }
  648 
  649         if (rid > rid_max || alloced[rid] == 0)
  650                 return (1);
  651 
  652         alloced[rid]--;
  653         return (0);
  654 }
  655 
  656 static int
  657 sbc_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
  658 {
  659         struct sbc_softc *scp = device_get_softc(bus);
  660         struct sndcard_func *func = device_get_ivars(dev);
  661 
  662         switch (index) {
  663         case 0:
  664                 *result = func->func;
  665                 break;
  666 
  667         case 1:
  668                 *result = scp->bd_ver;
  669                 break;
  670 
  671         default:
  672                 return ENOENT;
  673         }
  674 
  675         return 0;
  676 }
  677 
  678 static int
  679 sbc_write_ivar(device_t bus, device_t dev,
  680                int index, uintptr_t value)
  681 {
  682         switch (index) {
  683         case 0:
  684         case 1:
  685                 return EINVAL;
  686 
  687         default:
  688                 return (ENOENT);
  689         }
  690 }
  691 
  692 static int
  693 alloc_resource(struct sbc_softc *scp)
  694 {
  695         int i;
  696 
  697         for (i = 0 ; i < IO_MAX ; i++) {
  698                 if (scp->io[i] == NULL) {
  699 #ifdef PC98
  700                         scp->io_rid[i] = i > 0 ?
  701                                 scp->io_rid[i - 1] + io_range[i - 1] : 0;
  702                         scp->io[i] = isa_alloc_resourcev(scp->dev,
  703                                                          SYS_RES_IOPORT,
  704                                                          &scp->io_rid[i],
  705                                                          sb_iat[i],
  706                                                          io_range[i],
  707                                                          RF_ACTIVE);
  708                         if (scp->io[i] != NULL)
  709                                 isa_load_resourcev(scp->io[i], sb_iat[i],
  710                                                    io_range[i]);
  711 #else
  712                         scp->io_rid[i] = i;
  713                         scp->io[i] = bus_alloc_resource(scp->dev, SYS_RES_IOPORT, &scp->io_rid[i],
  714                                                         0, ~0, io_range[i], RF_ACTIVE);
  715 #endif
  716                         if (i == 0 && scp->io[i] == NULL)
  717                                 return (1);
  718                         scp->io_alloced[i] = 0;
  719                 }
  720         }
  721         for (i = 0 ; i < DRQ_MAX ; i++) {
  722                 if (scp->drq[i] == NULL) {
  723                         scp->drq_rid[i] = i;
  724                         scp->drq[i] = bus_alloc_resource_any(scp->dev,
  725                                                              SYS_RES_DRQ,
  726                                                              &scp->drq_rid[i],
  727                                                              RF_ACTIVE);
  728                         if (i == 0 && scp->drq[i] == NULL)
  729                                 return (1);
  730                         scp->drq_alloced[i] = 0;
  731                 }
  732         }
  733         for (i = 0 ; i < IRQ_MAX ; i++) {
  734                 if (scp->irq[i] == NULL) {
  735                         scp->irq_rid[i] = i;
  736                         scp->irq[i] = bus_alloc_resource_any(scp->dev,
  737                                                              SYS_RES_IRQ,
  738                                                              &scp->irq_rid[i],
  739                                                              RF_ACTIVE);
  740                         if (i == 0 && scp->irq[i] == NULL)
  741                                 return (1);
  742                         scp->irq_alloced[i] = 0;
  743                 }
  744         }
  745         return (0);
  746 }
  747 
  748 static int
  749 release_resource(struct sbc_softc *scp)
  750 {
  751         int i;
  752 
  753         for (i = 0 ; i < IO_MAX ; i++) {
  754                 if (scp->io[i] != NULL) {
  755                         bus_release_resource(scp->dev, SYS_RES_IOPORT, scp->io_rid[i], scp->io[i]);
  756                         scp->io[i] = NULL;
  757                 }
  758         }
  759         for (i = 0 ; i < DRQ_MAX ; i++) {
  760                 if (scp->drq[i] != NULL) {
  761                         bus_release_resource(scp->dev, SYS_RES_DRQ, scp->drq_rid[i], scp->drq[i]);
  762                         scp->drq[i] = NULL;
  763                 }
  764         }
  765         for (i = 0 ; i < IRQ_MAX ; i++) {
  766                 if (scp->irq[i] != NULL) {
  767                         if (scp->ih[i] != NULL)
  768                                 bus_teardown_intr(scp->dev, scp->irq[i], scp->ih[i]);
  769                         scp->ih[i] = NULL;
  770                         bus_release_resource(scp->dev, SYS_RES_IRQ, scp->irq_rid[i], scp->irq[i]);
  771                         scp->irq[i] = NULL;
  772                 }
  773         }
  774         return (0);
  775 }
  776 
  777 static device_method_t sbc_methods[] = {
  778         /* Device interface */
  779         DEVMETHOD(device_probe,         sbc_probe),
  780         DEVMETHOD(device_attach,        sbc_attach),
  781         DEVMETHOD(device_detach,        sbc_detach),
  782         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  783         DEVMETHOD(device_suspend,       bus_generic_suspend),
  784         DEVMETHOD(device_resume,        bus_generic_resume),
  785 
  786         /* Bus interface */
  787         DEVMETHOD(bus_read_ivar,        sbc_read_ivar),
  788         DEVMETHOD(bus_write_ivar,       sbc_write_ivar),
  789         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  790         DEVMETHOD(bus_alloc_resource,   sbc_alloc_resource),
  791         DEVMETHOD(bus_release_resource, sbc_release_resource),
  792         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  793         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  794         DEVMETHOD(bus_setup_intr,       sbc_setup_intr),
  795         DEVMETHOD(bus_teardown_intr,    sbc_teardown_intr),
  796 
  797         { 0, 0 }
  798 };
  799 
  800 static driver_t sbc_driver = {
  801         "sbc",
  802         sbc_methods,
  803         sizeof(struct sbc_softc),
  804 };
  805 
  806 /* sbc can be attached to an isa bus. */
  807 DRIVER_MODULE(snd_sbc, isa, sbc_driver, sbc_devclass, 0, 0);
  808 DRIVER_MODULE(snd_sbc, acpi, sbc_driver, sbc_devclass, 0, 0);
  809 MODULE_DEPEND(snd_sbc, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
  810 MODULE_VERSION(snd_sbc, 1);

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