The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/isa/sb8.c

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    1 /*-
    2  * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
    3  * Copyright (c) 1997,1998 Luigi Rizzo
    4  *
    5  * Derived from files in the Voxware 3.5 distribution,
    6  * Copyright by Hannu Savolainen 1994, under the same copyright
    7  * conditions.
    8  * All rights reserved.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 #ifdef HAVE_KERNEL_OPTION_HEADERS
   33 #include "opt_snd.h"
   34 #endif
   35 
   36 #include <dev/sound/pcm/sound.h>
   37 
   38 #include  <dev/sound/isa/sb.h>
   39 #include  <dev/sound/chip.h>
   40 
   41 #include <isa/isavar.h>
   42 
   43 #include "mixer_if.h"
   44 
   45 SND_DECLARE_FILE("$FreeBSD: releng/8.0/sys/dev/sound/isa/sb8.c 193640 2009-06-07 19:12:08Z ariff $");
   46 
   47 #define SB_DEFAULT_BUFSZ        4096
   48 
   49 static u_int32_t sb_fmt[] = {
   50         SND_FORMAT(AFMT_U8, 1, 0),
   51         0
   52 };
   53 static struct pcmchan_caps sb200_playcaps = {4000, 23000, sb_fmt, 0};
   54 static struct pcmchan_caps sb200_reccaps = {4000, 13000, sb_fmt, 0};
   55 static struct pcmchan_caps sb201_playcaps = {4000, 44100, sb_fmt, 0};
   56 static struct pcmchan_caps sb201_reccaps = {4000, 15000, sb_fmt, 0};
   57 
   58 static u_int32_t sbpro_fmt[] = {
   59         SND_FORMAT(AFMT_U8, 1, 0),
   60         SND_FORMAT(AFMT_U8, 2, 0),
   61         0
   62 };
   63 static struct pcmchan_caps sbpro_playcaps = {4000, 44100, sbpro_fmt, 0};
   64 static struct pcmchan_caps sbpro_reccaps = {4000, 44100, sbpro_fmt, 0};
   65 
   66 struct sb_info;
   67 
   68 struct sb_chinfo {
   69         struct sb_info *parent;
   70         struct pcm_channel *channel;
   71         struct snd_dbuf *buffer;
   72         int dir;
   73         u_int32_t fmt, spd, blksz;
   74 };
   75 
   76 struct sb_info {
   77         device_t parent_dev;
   78         struct resource *io_base;       /* I/O address for the board */
   79         struct resource *irq;
   80         struct resource *drq;
   81         void *ih;
   82         bus_dma_tag_t parent_dmat;
   83 
   84         unsigned int bufsize;
   85         int bd_id;
   86         u_long bd_flags;       /* board-specific flags */
   87         struct sb_chinfo pch, rch;
   88 };
   89 
   90 static int sb_rd(struct sb_info *sb, int reg);
   91 static void sb_wr(struct sb_info *sb, int reg, u_int8_t val);
   92 static int sb_dspready(struct sb_info *sb);
   93 static int sb_cmd(struct sb_info *sb, u_char val);
   94 static int sb_cmd1(struct sb_info *sb, u_char cmd, int val);
   95 static int sb_cmd2(struct sb_info *sb, u_char cmd, int val);
   96 static u_int sb_get_byte(struct sb_info *sb);
   97 static void sb_setmixer(struct sb_info *sb, u_int port, u_int value);
   98 static int sb_getmixer(struct sb_info *sb, u_int port);
   99 static int sb_reset_dsp(struct sb_info *sb);
  100 
  101 static void sb_intr(void *arg);
  102 static int sb_speed(struct sb_chinfo *ch);
  103 static int sb_start(struct sb_chinfo *ch);
  104 static int sb_stop(struct sb_chinfo *ch);
  105 
  106 /*
  107  * Common code for the midi and pcm functions
  108  *
  109  * sb_cmd write a single byte to the CMD port.
  110  * sb_cmd1 write a CMD + 1 byte arg
  111  * sb_cmd2 write a CMD + 2 byte arg
  112  * sb_get_byte returns a single byte from the DSP data port
  113  */
  114 
  115 static void
  116 sb_lock(struct sb_info *sb) {
  117 
  118         sbc_lock(device_get_softc(sb->parent_dev));
  119 }
  120 
  121 static void
  122 sb_unlock(struct sb_info *sb) {
  123 
  124         sbc_unlock(device_get_softc(sb->parent_dev));
  125 }
  126 
  127 static int
  128 port_rd(struct resource *port, int off)
  129 {
  130         return bus_space_read_1(rman_get_bustag(port), rman_get_bushandle(port), off);
  131 }
  132 
  133 static void
  134 port_wr(struct resource *port, int off, u_int8_t data)
  135 {
  136         bus_space_write_1(rman_get_bustag(port), rman_get_bushandle(port), off, data);
  137 }
  138 
  139 static int
  140 sb_rd(struct sb_info *sb, int reg)
  141 {
  142         return port_rd(sb->io_base, reg);
  143 }
  144 
  145 static void
  146 sb_wr(struct sb_info *sb, int reg, u_int8_t val)
  147 {
  148         port_wr(sb->io_base, reg, val);
  149 }
  150 
  151 static int
  152 sb_dspready(struct sb_info *sb)
  153 {
  154         return ((sb_rd(sb, SBDSP_STATUS) & 0x80) == 0);
  155 }
  156 
  157 static int
  158 sb_dspwr(struct sb_info *sb, u_char val)
  159 {
  160         int  i;
  161 
  162         for (i = 0; i < 1000; i++) {
  163                 if (sb_dspready(sb)) {
  164                         sb_wr(sb, SBDSP_CMD, val);
  165                         return 1;
  166                 }
  167                 if (i > 10) DELAY((i > 100)? 1000 : 10);
  168         }
  169         printf("sb_dspwr(0x%02x) timed out.\n", val);
  170         return 0;
  171 }
  172 
  173 static int
  174 sb_cmd(struct sb_info *sb, u_char val)
  175 {
  176 #if 0
  177         printf("sb_cmd: %x\n", val);
  178 #endif
  179         return sb_dspwr(sb, val);
  180 }
  181 
  182 static int
  183 sb_cmd1(struct sb_info *sb, u_char cmd, int val)
  184 {
  185 #if 0
  186         printf("sb_cmd1: %x, %x\n", cmd, val);
  187 #endif
  188         if (sb_dspwr(sb, cmd)) {
  189                 return sb_dspwr(sb, val & 0xff);
  190         } else return 0;
  191 }
  192 
  193 static int
  194 sb_cmd2(struct sb_info *sb, u_char cmd, int val)
  195 {
  196 #if 0
  197         printf("sb_cmd2: %x, %x\n", cmd, val);
  198 #endif
  199         if (sb_dspwr(sb, cmd)) {
  200                 return sb_dspwr(sb, val & 0xff) &&
  201                        sb_dspwr(sb, (val >> 8) & 0xff);
  202         } else return 0;
  203 }
  204 
  205 /*
  206  * in the SB, there is a set of indirect "mixer" registers with
  207  * address at offset 4, data at offset 5
  208  *
  209  * we don't need to interlock these, the mixer lock will suffice.
  210  */
  211 static void
  212 sb_setmixer(struct sb_info *sb, u_int port, u_int value)
  213 {
  214         sb_wr(sb, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  215         DELAY(10);
  216         sb_wr(sb, SB_MIX_DATA, (u_char) (value & 0xff));
  217         DELAY(10);
  218 }
  219 
  220 static int
  221 sb_getmixer(struct sb_info *sb, u_int port)
  222 {
  223         int val;
  224 
  225         sb_wr(sb, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  226         DELAY(10);
  227         val = sb_rd(sb, SB_MIX_DATA);
  228         DELAY(10);
  229 
  230         return val;
  231 }
  232 
  233 static u_int
  234 sb_get_byte(struct sb_info *sb)
  235 {
  236         int i;
  237 
  238         for (i = 1000; i > 0; i--) {
  239                 if (sb_rd(sb, DSP_DATA_AVAIL) & 0x80)
  240                         return sb_rd(sb, DSP_READ);
  241                 else
  242                         DELAY(20);
  243         }
  244         return 0xffff;
  245 }
  246 
  247 static int
  248 sb_reset_dsp(struct sb_info *sb)
  249 {
  250         sb_wr(sb, SBDSP_RST, 3);
  251         DELAY(100);
  252         sb_wr(sb, SBDSP_RST, 0);
  253         if (sb_get_byte(sb) != 0xAA) {
  254                 DEB(printf("sb_reset_dsp 0x%lx failed\n",
  255                            rman_get_start(sb->io_base)));
  256                 return ENXIO;   /* Sorry */
  257         }
  258         return 0;
  259 }
  260 
  261 static void
  262 sb_release_resources(struct sb_info *sb, device_t dev)
  263 {
  264         if (sb->irq) {
  265                 if (sb->ih)
  266                         bus_teardown_intr(dev, sb->irq, sb->ih);
  267                 bus_release_resource(dev, SYS_RES_IRQ, 0, sb->irq);
  268                 sb->irq = 0;
  269         }
  270         if (sb->drq) {
  271                 isa_dma_release(rman_get_start(sb->drq));
  272                 bus_release_resource(dev, SYS_RES_DRQ, 0, sb->drq);
  273                 sb->drq = 0;
  274         }
  275         if (sb->io_base) {
  276                 bus_release_resource(dev, SYS_RES_IOPORT, 0, sb->io_base);
  277                 sb->io_base = 0;
  278         }
  279         if (sb->parent_dmat) {
  280                 bus_dma_tag_destroy(sb->parent_dmat);
  281                 sb->parent_dmat = 0;
  282         }
  283         free(sb, M_DEVBUF);
  284 }
  285 
  286 static int
  287 sb_alloc_resources(struct sb_info *sb, device_t dev)
  288 {
  289         int rid;
  290 
  291         rid = 0;
  292         if (!sb->io_base)
  293                 sb->io_base = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
  294                         &rid, RF_ACTIVE);
  295         rid = 0;
  296         if (!sb->irq)
  297                 sb->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
  298                         &rid, RF_ACTIVE);
  299         rid = 0;
  300         if (!sb->drq)
  301                 sb->drq = bus_alloc_resource_any(dev, SYS_RES_DRQ,
  302                         &rid, RF_ACTIVE);
  303 
  304         if (sb->io_base && sb->drq && sb->irq) {
  305                 isa_dma_acquire(rman_get_start(sb->drq));
  306                 isa_dmainit(rman_get_start(sb->drq), sb->bufsize);
  307 
  308                 return 0;
  309         } else return ENXIO;
  310 }
  311 
  312 /************************************************************/
  313 
  314 static int
  315 sbpromix_init(struct snd_mixer *m)
  316 {
  317         struct sb_info *sb = mix_getdevinfo(m);
  318 
  319         mix_setdevs(m, SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_LINE |
  320                        SOUND_MASK_MIC | SOUND_MASK_CD | SOUND_MASK_VOLUME);
  321 
  322         mix_setrecdevs(m, SOUND_MASK_LINE | SOUND_MASK_MIC | SOUND_MASK_CD);
  323 
  324         sb_setmixer(sb, 0, 1); /* reset mixer */
  325 
  326         return 0;
  327 }
  328 
  329 static int
  330 sbpromix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
  331 {
  332         struct sb_info *sb = mix_getdevinfo(m);
  333         int reg, max;
  334         u_char val;
  335 
  336         max = 7;
  337         switch (dev) {
  338         case SOUND_MIXER_PCM:
  339                 reg = 0x04;
  340                 break;
  341 
  342         case SOUND_MIXER_MIC:
  343                 reg = 0x0a;
  344                 max = 3;
  345                 break;
  346 
  347         case SOUND_MIXER_VOLUME:
  348                 reg = 0x22;
  349                 break;
  350 
  351         case SOUND_MIXER_SYNTH:
  352                 reg = 0x26;
  353                 break;
  354 
  355         case SOUND_MIXER_CD:
  356                 reg = 0x28;
  357                 break;
  358 
  359         case SOUND_MIXER_LINE:
  360                 reg = 0x2e;
  361                 break;
  362 
  363         default:
  364                 return -1;
  365         }
  366 
  367         left = (left * max) / 100;
  368         right = (dev == SOUND_MIXER_MIC)? left : ((right * max) / 100);
  369 
  370         val = (dev == SOUND_MIXER_MIC)? (left << 1) : (left << 5 | right << 1);
  371         sb_setmixer(sb, reg, val);
  372 
  373         left = (left * 100) / max;
  374         right = (right * 100) / max;
  375 
  376         return left | (right << 8);
  377 }
  378 
  379 static u_int32_t
  380 sbpromix_setrecsrc(struct snd_mixer *m, u_int32_t src)
  381 {
  382         struct sb_info *sb = mix_getdevinfo(m);
  383         u_char recdev;
  384 
  385         if      (src == SOUND_MASK_LINE)
  386                 recdev = 0x06;
  387         else if (src == SOUND_MASK_CD)
  388                 recdev = 0x02;
  389         else { /* default: mic */
  390                 src = SOUND_MASK_MIC;
  391                 recdev = 0;
  392         }
  393         sb_setmixer(sb, RECORD_SRC, recdev | (sb_getmixer(sb, RECORD_SRC) & ~0x07));
  394 
  395         return src;
  396 }
  397 
  398 static kobj_method_t sbpromix_mixer_methods[] = {
  399         KOBJMETHOD(mixer_init,          sbpromix_init),
  400         KOBJMETHOD(mixer_set,           sbpromix_set),
  401         KOBJMETHOD(mixer_setrecsrc,     sbpromix_setrecsrc),
  402         KOBJMETHOD_END
  403 };
  404 MIXER_DECLARE(sbpromix_mixer);
  405 
  406 /************************************************************/
  407 
  408 static int
  409 sbmix_init(struct snd_mixer *m)
  410 {
  411         struct sb_info *sb = mix_getdevinfo(m);
  412 
  413         mix_setdevs(m, SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_CD | SOUND_MASK_VOLUME);
  414 
  415         mix_setrecdevs(m, 0);
  416 
  417         sb_setmixer(sb, 0, 1); /* reset mixer */
  418 
  419         return 0;
  420 }
  421 
  422 static int
  423 sbmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
  424 {
  425         struct sb_info *sb = mix_getdevinfo(m);
  426         int reg, max;
  427 
  428         max = 7;
  429         switch (dev) {
  430         case SOUND_MIXER_VOLUME:
  431                 reg = 0x2;
  432                 break;
  433 
  434         case SOUND_MIXER_SYNTH:
  435                 reg = 0x6;
  436                 break;
  437 
  438         case SOUND_MIXER_CD:
  439                 reg = 0x8;
  440                 break;
  441 
  442         case SOUND_MIXER_PCM:
  443                 reg = 0x0a;
  444                 max = 3;
  445                 break;
  446 
  447         default:
  448                 return -1;
  449         }
  450 
  451         left = (left * max) / 100;
  452 
  453         sb_setmixer(sb, reg, left << 1);
  454 
  455         left = (left * 100) / max;
  456 
  457         return left | (left << 8);
  458 }
  459 
  460 static u_int32_t
  461 sbmix_setrecsrc(struct snd_mixer *m, u_int32_t src)
  462 {
  463         return 0;
  464 }
  465 
  466 static kobj_method_t sbmix_mixer_methods[] = {
  467         KOBJMETHOD(mixer_init,          sbmix_init),
  468         KOBJMETHOD(mixer_set,           sbmix_set),
  469         KOBJMETHOD(mixer_setrecsrc,     sbmix_setrecsrc),
  470         KOBJMETHOD_END
  471 };
  472 MIXER_DECLARE(sbmix_mixer);
  473 
  474 /************************************************************/
  475 
  476 static void
  477 sb_intr(void *arg)
  478 {
  479         struct sb_info *sb = (struct sb_info *)arg;
  480 
  481         sb_lock(sb);
  482         if (sndbuf_runsz(sb->pch.buffer) > 0) {
  483                 sb_unlock(sb);
  484                 chn_intr(sb->pch.channel);
  485                 sb_lock(sb);
  486         }
  487 
  488         if (sndbuf_runsz(sb->rch.buffer) > 0) {
  489                 sb_unlock(sb);
  490                 chn_intr(sb->rch.channel);
  491                 sb_lock(sb);
  492         }
  493 
  494         sb_rd(sb, DSP_DATA_AVAIL); /* int ack */
  495         sb_unlock(sb);
  496 }
  497 
  498 static int
  499 sb_speed(struct sb_chinfo *ch)
  500 {
  501         struct sb_info *sb = ch->parent;
  502         int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  503         int stereo = (AFMT_CHANNEL(ch->fmt) > 1)? 1 : 0;
  504         int speed, tmp, thresh, max;
  505         u_char tconst;
  506 
  507         if (sb->bd_id >= 0x300) {
  508                 thresh = stereo? 11025 : 23000;
  509                 max = stereo? 22050 : 44100;
  510         } else if (sb->bd_id > 0x200) {
  511                 thresh = play? 23000 : 13000;
  512                 max = play? 44100 : 15000;
  513         } else {
  514                 thresh = 999999;
  515                 max = play? 23000 : 13000;
  516         }
  517 
  518         speed = ch->spd;
  519         if (speed > max)
  520                 speed = max;
  521 
  522         sb_lock(sb);
  523         sb->bd_flags &= ~BD_F_HISPEED;
  524         if (speed > thresh)
  525                 sb->bd_flags |= BD_F_HISPEED;
  526 
  527         tmp = 65536 - (256000000 / (speed << stereo));
  528         tconst = tmp >> 8;
  529 
  530         sb_cmd1(sb, 0x40, tconst); /* set time constant */
  531 
  532         speed = (256000000 / (65536 - tmp)) >> stereo;
  533 
  534         ch->spd = speed;
  535         sb_unlock(sb);
  536         return speed;
  537 }
  538 
  539 static int
  540 sb_start(struct sb_chinfo *ch)
  541 {
  542         struct sb_info *sb = ch->parent;
  543         int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  544         int stereo = (AFMT_CHANNEL(ch->fmt) > 1)? 1 : 0;
  545         int l = ch->blksz;
  546         u_char i;
  547 
  548         l--;
  549 
  550         sb_lock(sb);
  551         if (play)
  552                 sb_cmd(sb, DSP_CMD_SPKON);
  553 
  554         if (sb->bd_flags & BD_F_HISPEED)
  555                 i = play? 0x90 : 0x98;
  556         else
  557                 i = play? 0x1c : 0x2c;
  558 
  559         sb_setmixer(sb, 0x0e, stereo? 2 : 0);
  560         sb_cmd2(sb, 0x48, l);
  561         sb_cmd(sb, i);
  562 
  563         sb->bd_flags |= BD_F_DMARUN;
  564         sb_unlock(sb);
  565         return 0;
  566 }
  567 
  568 static int
  569 sb_stop(struct sb_chinfo *ch)
  570 {
  571         struct sb_info *sb = ch->parent;
  572         int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  573 
  574         sb_lock(sb);
  575         if (sb->bd_flags & BD_F_HISPEED)
  576                 sb_reset_dsp(sb);
  577         else {
  578 #if 0
  579                 /*
  580                  * NOTE: DSP_CMD_DMAEXIT_8 does not work with old
  581                  * soundblaster.
  582                  */
  583                 sb_cmd(sb, DSP_CMD_DMAEXIT_8);
  584 #endif
  585                 sb_reset_dsp(sb);
  586         }
  587 
  588         if (play)
  589                 sb_cmd(sb, DSP_CMD_SPKOFF); /* speaker off */
  590         sb_unlock(sb);
  591         sb->bd_flags &= ~BD_F_DMARUN;
  592         return 0;
  593 }
  594 
  595 /* channel interface */
  596 static void *
  597 sbchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
  598 {
  599         struct sb_info *sb = devinfo;
  600         struct sb_chinfo *ch = (dir == PCMDIR_PLAY)? &sb->pch : &sb->rch;
  601 
  602         ch->parent = sb;
  603         ch->channel = c;
  604         ch->dir = dir;
  605         ch->buffer = b;
  606         if (sndbuf_alloc(ch->buffer, sb->parent_dmat, 0, sb->bufsize) != 0)
  607                 return NULL;
  608         sndbuf_dmasetup(ch->buffer, sb->drq);
  609         return ch;
  610 }
  611 
  612 static int
  613 sbchan_setformat(kobj_t obj, void *data, u_int32_t format)
  614 {
  615         struct sb_chinfo *ch = data;
  616 
  617         ch->fmt = format;
  618         return 0;
  619 }
  620 
  621 static u_int32_t
  622 sbchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
  623 {
  624         struct sb_chinfo *ch = data;
  625 
  626         ch->spd = speed;
  627         return sb_speed(ch);
  628 }
  629 
  630 static u_int32_t
  631 sbchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
  632 {
  633         struct sb_chinfo *ch = data;
  634 
  635         ch->blksz = blocksize;
  636         return ch->blksz;
  637 }
  638 
  639 static int
  640 sbchan_trigger(kobj_t obj, void *data, int go)
  641 {
  642         struct sb_chinfo *ch = data;
  643 
  644         if (!PCMTRIG_COMMON(go))
  645                 return 0;
  646 
  647         sndbuf_dma(ch->buffer, go);
  648         if (go == PCMTRIG_START)
  649                 sb_start(ch);
  650         else
  651                 sb_stop(ch);
  652         return 0;
  653 }
  654 
  655 static u_int32_t
  656 sbchan_getptr(kobj_t obj, void *data)
  657 {
  658         struct sb_chinfo *ch = data;
  659 
  660         return sndbuf_dmaptr(ch->buffer);
  661 }
  662 
  663 static struct pcmchan_caps *
  664 sbchan_getcaps(kobj_t obj, void *data)
  665 {
  666         struct sb_chinfo *ch = data;
  667         int p = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  668 
  669         if (ch->parent->bd_id == 0x200)
  670                 return p? &sb200_playcaps : &sb200_reccaps;
  671         if (ch->parent->bd_id < 0x300)
  672                 return p? &sb201_playcaps : &sb201_reccaps;
  673         return p? &sbpro_playcaps : &sbpro_reccaps;
  674 }
  675 
  676 static kobj_method_t sbchan_methods[] = {
  677         KOBJMETHOD(channel_init,                sbchan_init),
  678         KOBJMETHOD(channel_setformat,           sbchan_setformat),
  679         KOBJMETHOD(channel_setspeed,            sbchan_setspeed),
  680         KOBJMETHOD(channel_setblocksize,        sbchan_setblocksize),
  681         KOBJMETHOD(channel_trigger,             sbchan_trigger),
  682         KOBJMETHOD(channel_getptr,              sbchan_getptr),
  683         KOBJMETHOD(channel_getcaps,             sbchan_getcaps),
  684         KOBJMETHOD_END
  685 };
  686 CHANNEL_DECLARE(sbchan);
  687 
  688 /************************************************************/
  689 
  690 static int
  691 sb_probe(device_t dev)
  692 {
  693         char buf[64];
  694         uintptr_t func, ver, r, f;
  695 
  696         /* The parent device has already been probed. */
  697         r = BUS_READ_IVAR(device_get_parent(dev), dev, 0, &func);
  698         if (func != SCF_PCM)
  699                 return (ENXIO);
  700 
  701         r = BUS_READ_IVAR(device_get_parent(dev), dev, 1, &ver);
  702         f = (ver & 0xffff0000) >> 16;
  703         ver &= 0x0000ffff;
  704         if ((f & BD_F_ESS) || (ver >= 0x400))
  705                 return (ENXIO);
  706 
  707         snprintf(buf, sizeof buf, "SB DSP %d.%02d", (int) ver >> 8, (int) ver & 0xff);
  708 
  709         device_set_desc_copy(dev, buf);
  710 
  711         return 0;
  712 }
  713 
  714 static int
  715 sb_attach(device_t dev)
  716 {
  717         struct sb_info *sb;
  718         char status[SND_STATUSLEN];
  719         uintptr_t ver;
  720 
  721         sb = malloc(sizeof(*sb), M_DEVBUF, M_WAITOK | M_ZERO);
  722         sb->parent_dev = device_get_parent(dev);
  723         BUS_READ_IVAR(device_get_parent(dev), dev, 1, &ver);
  724         sb->bd_id = ver & 0x0000ffff;
  725         sb->bd_flags = (ver & 0xffff0000) >> 16;
  726         sb->bufsize = pcm_getbuffersize(dev, 4096, SB_DEFAULT_BUFSZ, 65536);
  727 
  728         if (sb_alloc_resources(sb, dev))
  729                 goto no;
  730         if (sb_reset_dsp(sb))
  731                 goto no;
  732         if (mixer_init(dev, (sb->bd_id < 0x300)? &sbmix_mixer_class : &sbpromix_mixer_class, sb))
  733                 goto no;
  734         if (snd_setup_intr(dev, sb->irq, 0, sb_intr, sb, &sb->ih))
  735                 goto no;
  736 
  737         pcm_setflags(dev, pcm_getflags(dev) | SD_F_SIMPLEX);
  738 
  739         if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2,
  740                         /*boundary*/0,
  741                         /*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
  742                         /*highaddr*/BUS_SPACE_MAXADDR,
  743                         /*filter*/NULL, /*filterarg*/NULL,
  744                         /*maxsize*/sb->bufsize, /*nsegments*/1,
  745                         /*maxsegz*/0x3ffff, /*flags*/0,
  746                         /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant,
  747                         &sb->parent_dmat) != 0) {
  748                 device_printf(dev, "unable to create dma tag\n");
  749                 goto no;
  750         }
  751 
  752         snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld drq %ld bufsz %u %s",
  753                 rman_get_start(sb->io_base), rman_get_start(sb->irq),
  754                 rman_get_start(sb->drq), sb->bufsize, PCM_KLDSTRING(snd_sb8));
  755 
  756         if (pcm_register(dev, sb, 1, 1))
  757                 goto no;
  758         pcm_addchan(dev, PCMDIR_REC, &sbchan_class, sb);
  759         pcm_addchan(dev, PCMDIR_PLAY, &sbchan_class, sb);
  760 
  761         pcm_setstatus(dev, status);
  762 
  763         return 0;
  764 
  765 no:
  766         sb_release_resources(sb, dev);
  767         return ENXIO;
  768 }
  769 
  770 static int
  771 sb_detach(device_t dev)
  772 {
  773         int r;
  774         struct sb_info *sb;
  775 
  776         r = pcm_unregister(dev);
  777         if (r)
  778                 return r;
  779 
  780         sb = pcm_getdevinfo(dev);
  781         sb_release_resources(sb, dev);
  782         return 0;
  783 }
  784 
  785 static device_method_t sb_methods[] = {
  786         /* Device interface */
  787         DEVMETHOD(device_probe,         sb_probe),
  788         DEVMETHOD(device_attach,        sb_attach),
  789         DEVMETHOD(device_detach,        sb_detach),
  790 
  791         { 0, 0 }
  792 };
  793 
  794 static driver_t sb_driver = {
  795         "pcm",
  796         sb_methods,
  797         PCM_SOFTC_SIZE,
  798 };
  799 
  800 DRIVER_MODULE(snd_sb8, sbc, sb_driver, pcm_devclass, 0, 0);
  801 MODULE_DEPEND(snd_sb8, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
  802 MODULE_DEPEND(snd_sb8, snd_sbc, 1, 1, 1);
  803 MODULE_VERSION(snd_sb8, 1);
  804 
  805 
  806 
  807 

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