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  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
    5  * Copyright (c) 1997,1998 Luigi Rizzo
    6  *
    7  * Derived from files in the Voxware 3.5 distribution,
    8  * Copyright by Hannu Savolainen 1994, under the same copyright
    9  * conditions.
   10  * All rights reserved.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  */
   33 
   34 #ifdef HAVE_KERNEL_OPTION_HEADERS
   35 #include "opt_snd.h"
   36 #endif
   37 
   38 #include <dev/sound/pcm/sound.h>
   39 
   40 #include  <dev/sound/isa/sb.h>
   41 #include  <dev/sound/chip.h>
   42 
   43 #include <isa/isavar.h>
   44 
   45 #include "mixer_if.h"
   46 
   47 SND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/isa/sb8.c 326255 2017-11-27 14:52:40Z pfg $");
   48 
   49 #define SB_DEFAULT_BUFSZ        4096
   50 
   51 static u_int32_t sb_fmt[] = {
   52         SND_FORMAT(AFMT_U8, 1, 0),
   53         0
   54 };
   55 static struct pcmchan_caps sb200_playcaps = {4000, 23000, sb_fmt, 0};
   56 static struct pcmchan_caps sb200_reccaps = {4000, 13000, sb_fmt, 0};
   57 static struct pcmchan_caps sb201_playcaps = {4000, 44100, sb_fmt, 0};
   58 static struct pcmchan_caps sb201_reccaps = {4000, 15000, sb_fmt, 0};
   59 
   60 static u_int32_t sbpro_fmt[] = {
   61         SND_FORMAT(AFMT_U8, 1, 0),
   62         SND_FORMAT(AFMT_U8, 2, 0),
   63         0
   64 };
   65 static struct pcmchan_caps sbpro_playcaps = {4000, 44100, sbpro_fmt, 0};
   66 static struct pcmchan_caps sbpro_reccaps = {4000, 44100, sbpro_fmt, 0};
   67 
   68 struct sb_info;
   69 
   70 struct sb_chinfo {
   71         struct sb_info *parent;
   72         struct pcm_channel *channel;
   73         struct snd_dbuf *buffer;
   74         int dir;
   75         u_int32_t fmt, spd, blksz;
   76 };
   77 
   78 struct sb_info {
   79         device_t parent_dev;
   80         struct resource *io_base;       /* I/O address for the board */
   81         struct resource *irq;
   82         struct resource *drq;
   83         void *ih;
   84         bus_dma_tag_t parent_dmat;
   85 
   86         unsigned int bufsize;
   87         int bd_id;
   88         u_long bd_flags;       /* board-specific flags */
   89         struct sb_chinfo pch, rch;
   90 };
   91 
   92 static int sb_rd(struct sb_info *sb, int reg);
   93 static void sb_wr(struct sb_info *sb, int reg, u_int8_t val);
   94 static int sb_dspready(struct sb_info *sb);
   95 static int sb_cmd(struct sb_info *sb, u_char val);
   96 static int sb_cmd1(struct sb_info *sb, u_char cmd, int val);
   97 static int sb_cmd2(struct sb_info *sb, u_char cmd, int val);
   98 static u_int sb_get_byte(struct sb_info *sb);
   99 static void sb_setmixer(struct sb_info *sb, u_int port, u_int value);
  100 static int sb_getmixer(struct sb_info *sb, u_int port);
  101 static int sb_reset_dsp(struct sb_info *sb);
  102 
  103 static void sb_intr(void *arg);
  104 static int sb_speed(struct sb_chinfo *ch);
  105 static int sb_start(struct sb_chinfo *ch);
  106 static int sb_stop(struct sb_chinfo *ch);
  107 
  108 /*
  109  * Common code for the midi and pcm functions
  110  *
  111  * sb_cmd write a single byte to the CMD port.
  112  * sb_cmd1 write a CMD + 1 byte arg
  113  * sb_cmd2 write a CMD + 2 byte arg
  114  * sb_get_byte returns a single byte from the DSP data port
  115  */
  116 
  117 static void
  118 sb_lock(struct sb_info *sb) {
  119 
  120         sbc_lock(device_get_softc(sb->parent_dev));
  121 }
  122 
  123 static void
  124 sb_unlock(struct sb_info *sb) {
  125 
  126         sbc_unlock(device_get_softc(sb->parent_dev));
  127 }
  128 
  129 static int
  130 port_rd(struct resource *port, int off)
  131 {
  132         return bus_space_read_1(rman_get_bustag(port), rman_get_bushandle(port), off);
  133 }
  134 
  135 static void
  136 port_wr(struct resource *port, int off, u_int8_t data)
  137 {
  138         bus_space_write_1(rman_get_bustag(port), rman_get_bushandle(port), off, data);
  139 }
  140 
  141 static int
  142 sb_rd(struct sb_info *sb, int reg)
  143 {
  144         return port_rd(sb->io_base, reg);
  145 }
  146 
  147 static void
  148 sb_wr(struct sb_info *sb, int reg, u_int8_t val)
  149 {
  150         port_wr(sb->io_base, reg, val);
  151 }
  152 
  153 static int
  154 sb_dspready(struct sb_info *sb)
  155 {
  156         return ((sb_rd(sb, SBDSP_STATUS) & 0x80) == 0);
  157 }
  158 
  159 static int
  160 sb_dspwr(struct sb_info *sb, u_char val)
  161 {
  162         int  i;
  163 
  164         for (i = 0; i < 1000; i++) {
  165                 if (sb_dspready(sb)) {
  166                         sb_wr(sb, SBDSP_CMD, val);
  167                         return 1;
  168                 }
  169                 if (i > 10) DELAY((i > 100)? 1000 : 10);
  170         }
  171         printf("sb_dspwr(0x%02x) timed out.\n", val);
  172         return 0;
  173 }
  174 
  175 static int
  176 sb_cmd(struct sb_info *sb, u_char val)
  177 {
  178 #if 0
  179         printf("sb_cmd: %x\n", val);
  180 #endif
  181         return sb_dspwr(sb, val);
  182 }
  183 
  184 static int
  185 sb_cmd1(struct sb_info *sb, u_char cmd, int val)
  186 {
  187 #if 0
  188         printf("sb_cmd1: %x, %x\n", cmd, val);
  189 #endif
  190         if (sb_dspwr(sb, cmd)) {
  191                 return sb_dspwr(sb, val & 0xff);
  192         } else return 0;
  193 }
  194 
  195 static int
  196 sb_cmd2(struct sb_info *sb, u_char cmd, int val)
  197 {
  198 #if 0
  199         printf("sb_cmd2: %x, %x\n", cmd, val);
  200 #endif
  201         if (sb_dspwr(sb, cmd)) {
  202                 return sb_dspwr(sb, val & 0xff) &&
  203                        sb_dspwr(sb, (val >> 8) & 0xff);
  204         } else return 0;
  205 }
  206 
  207 /*
  208  * in the SB, there is a set of indirect "mixer" registers with
  209  * address at offset 4, data at offset 5
  210  *
  211  * we don't need to interlock these, the mixer lock will suffice.
  212  */
  213 static void
  214 sb_setmixer(struct sb_info *sb, u_int port, u_int value)
  215 {
  216         sb_wr(sb, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  217         DELAY(10);
  218         sb_wr(sb, SB_MIX_DATA, (u_char) (value & 0xff));
  219         DELAY(10);
  220 }
  221 
  222 static int
  223 sb_getmixer(struct sb_info *sb, u_int port)
  224 {
  225         int val;
  226 
  227         sb_wr(sb, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  228         DELAY(10);
  229         val = sb_rd(sb, SB_MIX_DATA);
  230         DELAY(10);
  231 
  232         return val;
  233 }
  234 
  235 static u_int
  236 sb_get_byte(struct sb_info *sb)
  237 {
  238         int i;
  239 
  240         for (i = 1000; i > 0; i--) {
  241                 if (sb_rd(sb, DSP_DATA_AVAIL) & 0x80)
  242                         return sb_rd(sb, DSP_READ);
  243                 else
  244                         DELAY(20);
  245         }
  246         return 0xffff;
  247 }
  248 
  249 static int
  250 sb_reset_dsp(struct sb_info *sb)
  251 {
  252         sb_wr(sb, SBDSP_RST, 3);
  253         DELAY(100);
  254         sb_wr(sb, SBDSP_RST, 0);
  255         if (sb_get_byte(sb) != 0xAA) {
  256                 DEB(printf("sb_reset_dsp 0x%lx failed\n",
  257                            rman_get_start(sb->io_base)));
  258                 return ENXIO;   /* Sorry */
  259         }
  260         return 0;
  261 }
  262 
  263 static void
  264 sb_release_resources(struct sb_info *sb, device_t dev)
  265 {
  266         if (sb->irq) {
  267                 if (sb->ih)
  268                         bus_teardown_intr(dev, sb->irq, sb->ih);
  269                 bus_release_resource(dev, SYS_RES_IRQ, 0, sb->irq);
  270                 sb->irq = NULL;
  271         }
  272         if (sb->drq) {
  273                 isa_dma_release(rman_get_start(sb->drq));
  274                 bus_release_resource(dev, SYS_RES_DRQ, 0, sb->drq);
  275                 sb->drq = NULL;
  276         }
  277         if (sb->io_base) {
  278                 bus_release_resource(dev, SYS_RES_IOPORT, 0, sb->io_base);
  279                 sb->io_base = NULL;
  280         }
  281         if (sb->parent_dmat) {
  282                 bus_dma_tag_destroy(sb->parent_dmat);
  283                 sb->parent_dmat = 0;
  284         }
  285         free(sb, M_DEVBUF);
  286 }
  287 
  288 static int
  289 sb_alloc_resources(struct sb_info *sb, device_t dev)
  290 {
  291         int rid;
  292 
  293         rid = 0;
  294         if (!sb->io_base)
  295                 sb->io_base = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
  296                         &rid, RF_ACTIVE);
  297         rid = 0;
  298         if (!sb->irq)
  299                 sb->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
  300                         &rid, RF_ACTIVE);
  301         rid = 0;
  302         if (!sb->drq)
  303                 sb->drq = bus_alloc_resource_any(dev, SYS_RES_DRQ,
  304                         &rid, RF_ACTIVE);
  305 
  306         if (sb->io_base && sb->drq && sb->irq) {
  307                 isa_dma_acquire(rman_get_start(sb->drq));
  308                 isa_dmainit(rman_get_start(sb->drq), sb->bufsize);
  309 
  310                 return 0;
  311         } else return ENXIO;
  312 }
  313 
  314 /************************************************************/
  315 
  316 static int
  317 sbpromix_init(struct snd_mixer *m)
  318 {
  319         struct sb_info *sb = mix_getdevinfo(m);
  320 
  321         mix_setdevs(m, SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_LINE |
  322                        SOUND_MASK_MIC | SOUND_MASK_CD | SOUND_MASK_VOLUME);
  323 
  324         mix_setrecdevs(m, SOUND_MASK_LINE | SOUND_MASK_MIC | SOUND_MASK_CD);
  325 
  326         sb_setmixer(sb, 0, 1); /* reset mixer */
  327 
  328         return 0;
  329 }
  330 
  331 static int
  332 sbpromix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
  333 {
  334         struct sb_info *sb = mix_getdevinfo(m);
  335         int reg, max;
  336         u_char val;
  337 
  338         max = 7;
  339         switch (dev) {
  340         case SOUND_MIXER_PCM:
  341                 reg = 0x04;
  342                 break;
  343 
  344         case SOUND_MIXER_MIC:
  345                 reg = 0x0a;
  346                 max = 3;
  347                 break;
  348 
  349         case SOUND_MIXER_VOLUME:
  350                 reg = 0x22;
  351                 break;
  352 
  353         case SOUND_MIXER_SYNTH:
  354                 reg = 0x26;
  355                 break;
  356 
  357         case SOUND_MIXER_CD:
  358                 reg = 0x28;
  359                 break;
  360 
  361         case SOUND_MIXER_LINE:
  362                 reg = 0x2e;
  363                 break;
  364 
  365         default:
  366                 return -1;
  367         }
  368 
  369         left = (left * max) / 100;
  370         right = (dev == SOUND_MIXER_MIC)? left : ((right * max) / 100);
  371 
  372         val = (dev == SOUND_MIXER_MIC)? (left << 1) : (left << 5 | right << 1);
  373         sb_setmixer(sb, reg, val);
  374 
  375         left = (left * 100) / max;
  376         right = (right * 100) / max;
  377 
  378         return left | (right << 8);
  379 }
  380 
  381 static u_int32_t
  382 sbpromix_setrecsrc(struct snd_mixer *m, u_int32_t src)
  383 {
  384         struct sb_info *sb = mix_getdevinfo(m);
  385         u_char recdev;
  386 
  387         if      (src == SOUND_MASK_LINE)
  388                 recdev = 0x06;
  389         else if (src == SOUND_MASK_CD)
  390                 recdev = 0x02;
  391         else { /* default: mic */
  392                 src = SOUND_MASK_MIC;
  393                 recdev = 0;
  394         }
  395         sb_setmixer(sb, RECORD_SRC, recdev | (sb_getmixer(sb, RECORD_SRC) & ~0x07));
  396 
  397         return src;
  398 }
  399 
  400 static kobj_method_t sbpromix_mixer_methods[] = {
  401         KOBJMETHOD(mixer_init,          sbpromix_init),
  402         KOBJMETHOD(mixer_set,           sbpromix_set),
  403         KOBJMETHOD(mixer_setrecsrc,     sbpromix_setrecsrc),
  404         KOBJMETHOD_END
  405 };
  406 MIXER_DECLARE(sbpromix_mixer);
  407 
  408 /************************************************************/
  409 
  410 static int
  411 sbmix_init(struct snd_mixer *m)
  412 {
  413         struct sb_info *sb = mix_getdevinfo(m);
  414 
  415         mix_setdevs(m, SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_CD | SOUND_MASK_VOLUME);
  416 
  417         mix_setrecdevs(m, 0);
  418 
  419         sb_setmixer(sb, 0, 1); /* reset mixer */
  420 
  421         return 0;
  422 }
  423 
  424 static int
  425 sbmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
  426 {
  427         struct sb_info *sb = mix_getdevinfo(m);
  428         int reg, max;
  429 
  430         max = 7;
  431         switch (dev) {
  432         case SOUND_MIXER_VOLUME:
  433                 reg = 0x2;
  434                 break;
  435 
  436         case SOUND_MIXER_SYNTH:
  437                 reg = 0x6;
  438                 break;
  439 
  440         case SOUND_MIXER_CD:
  441                 reg = 0x8;
  442                 break;
  443 
  444         case SOUND_MIXER_PCM:
  445                 reg = 0x0a;
  446                 max = 3;
  447                 break;
  448 
  449         default:
  450                 return -1;
  451         }
  452 
  453         left = (left * max) / 100;
  454 
  455         sb_setmixer(sb, reg, left << 1);
  456 
  457         left = (left * 100) / max;
  458 
  459         return left | (left << 8);
  460 }
  461 
  462 static u_int32_t
  463 sbmix_setrecsrc(struct snd_mixer *m, u_int32_t src)
  464 {
  465         return 0;
  466 }
  467 
  468 static kobj_method_t sbmix_mixer_methods[] = {
  469         KOBJMETHOD(mixer_init,          sbmix_init),
  470         KOBJMETHOD(mixer_set,           sbmix_set),
  471         KOBJMETHOD(mixer_setrecsrc,     sbmix_setrecsrc),
  472         KOBJMETHOD_END
  473 };
  474 MIXER_DECLARE(sbmix_mixer);
  475 
  476 /************************************************************/
  477 
  478 static void
  479 sb_intr(void *arg)
  480 {
  481         struct sb_info *sb = (struct sb_info *)arg;
  482 
  483         sb_lock(sb);
  484         if (sndbuf_runsz(sb->pch.buffer) > 0) {
  485                 sb_unlock(sb);
  486                 chn_intr(sb->pch.channel);
  487                 sb_lock(sb);
  488         }
  489 
  490         if (sndbuf_runsz(sb->rch.buffer) > 0) {
  491                 sb_unlock(sb);
  492                 chn_intr(sb->rch.channel);
  493                 sb_lock(sb);
  494         }
  495 
  496         sb_rd(sb, DSP_DATA_AVAIL); /* int ack */
  497         sb_unlock(sb);
  498 }
  499 
  500 static int
  501 sb_speed(struct sb_chinfo *ch)
  502 {
  503         struct sb_info *sb = ch->parent;
  504         int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  505         int stereo = (AFMT_CHANNEL(ch->fmt) > 1)? 1 : 0;
  506         int speed, tmp, thresh, max;
  507         u_char tconst;
  508 
  509         if (sb->bd_id >= 0x300) {
  510                 thresh = stereo? 11025 : 23000;
  511                 max = stereo? 22050 : 44100;
  512         } else if (sb->bd_id > 0x200) {
  513                 thresh = play? 23000 : 13000;
  514                 max = play? 44100 : 15000;
  515         } else {
  516                 thresh = 999999;
  517                 max = play? 23000 : 13000;
  518         }
  519 
  520         speed = ch->spd;
  521         if (speed > max)
  522                 speed = max;
  523 
  524         sb_lock(sb);
  525         sb->bd_flags &= ~BD_F_HISPEED;
  526         if (speed > thresh)
  527                 sb->bd_flags |= BD_F_HISPEED;
  528 
  529         tmp = 65536 - (256000000 / (speed << stereo));
  530         tconst = tmp >> 8;
  531 
  532         sb_cmd1(sb, 0x40, tconst); /* set time constant */
  533 
  534         speed = (256000000 / (65536 - tmp)) >> stereo;
  535 
  536         ch->spd = speed;
  537         sb_unlock(sb);
  538         return speed;
  539 }
  540 
  541 static int
  542 sb_start(struct sb_chinfo *ch)
  543 {
  544         struct sb_info *sb = ch->parent;
  545         int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  546         int stereo = (AFMT_CHANNEL(ch->fmt) > 1)? 1 : 0;
  547         int l = ch->blksz;
  548         u_char i;
  549 
  550         l--;
  551 
  552         sb_lock(sb);
  553         if (play)
  554                 sb_cmd(sb, DSP_CMD_SPKON);
  555 
  556         if (sb->bd_flags & BD_F_HISPEED)
  557                 i = play? 0x90 : 0x98;
  558         else
  559                 i = play? 0x1c : 0x2c;
  560 
  561         sb_setmixer(sb, 0x0e, stereo? 2 : 0);
  562         sb_cmd2(sb, 0x48, l);
  563         sb_cmd(sb, i);
  564 
  565         sb->bd_flags |= BD_F_DMARUN;
  566         sb_unlock(sb);
  567         return 0;
  568 }
  569 
  570 static int
  571 sb_stop(struct sb_chinfo *ch)
  572 {
  573         struct sb_info *sb = ch->parent;
  574         int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  575 
  576         sb_lock(sb);
  577         if (sb->bd_flags & BD_F_HISPEED)
  578                 sb_reset_dsp(sb);
  579         else {
  580 #if 0
  581                 /*
  582                  * NOTE: DSP_CMD_DMAEXIT_8 does not work with old
  583                  * soundblaster.
  584                  */
  585                 sb_cmd(sb, DSP_CMD_DMAEXIT_8);
  586 #endif
  587                 sb_reset_dsp(sb);
  588         }
  589 
  590         if (play)
  591                 sb_cmd(sb, DSP_CMD_SPKOFF); /* speaker off */
  592         sb_unlock(sb);
  593         sb->bd_flags &= ~BD_F_DMARUN;
  594         return 0;
  595 }
  596 
  597 /* channel interface */
  598 static void *
  599 sbchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
  600 {
  601         struct sb_info *sb = devinfo;
  602         struct sb_chinfo *ch = (dir == PCMDIR_PLAY)? &sb->pch : &sb->rch;
  603 
  604         ch->parent = sb;
  605         ch->channel = c;
  606         ch->dir = dir;
  607         ch->buffer = b;
  608         if (sndbuf_alloc(ch->buffer, sb->parent_dmat, 0, sb->bufsize) != 0)
  609                 return NULL;
  610         sndbuf_dmasetup(ch->buffer, sb->drq);
  611         return ch;
  612 }
  613 
  614 static int
  615 sbchan_setformat(kobj_t obj, void *data, u_int32_t format)
  616 {
  617         struct sb_chinfo *ch = data;
  618 
  619         ch->fmt = format;
  620         return 0;
  621 }
  622 
  623 static u_int32_t
  624 sbchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
  625 {
  626         struct sb_chinfo *ch = data;
  627 
  628         ch->spd = speed;
  629         return sb_speed(ch);
  630 }
  631 
  632 static u_int32_t
  633 sbchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
  634 {
  635         struct sb_chinfo *ch = data;
  636 
  637         ch->blksz = blocksize;
  638         return ch->blksz;
  639 }
  640 
  641 static int
  642 sbchan_trigger(kobj_t obj, void *data, int go)
  643 {
  644         struct sb_chinfo *ch = data;
  645 
  646         if (!PCMTRIG_COMMON(go))
  647                 return 0;
  648 
  649         sndbuf_dma(ch->buffer, go);
  650         if (go == PCMTRIG_START)
  651                 sb_start(ch);
  652         else
  653                 sb_stop(ch);
  654         return 0;
  655 }
  656 
  657 static u_int32_t
  658 sbchan_getptr(kobj_t obj, void *data)
  659 {
  660         struct sb_chinfo *ch = data;
  661 
  662         return sndbuf_dmaptr(ch->buffer);
  663 }
  664 
  665 static struct pcmchan_caps *
  666 sbchan_getcaps(kobj_t obj, void *data)
  667 {
  668         struct sb_chinfo *ch = data;
  669         int p = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  670 
  671         if (ch->parent->bd_id == 0x200)
  672                 return p? &sb200_playcaps : &sb200_reccaps;
  673         if (ch->parent->bd_id < 0x300)
  674                 return p? &sb201_playcaps : &sb201_reccaps;
  675         return p? &sbpro_playcaps : &sbpro_reccaps;
  676 }
  677 
  678 static kobj_method_t sbchan_methods[] = {
  679         KOBJMETHOD(channel_init,                sbchan_init),
  680         KOBJMETHOD(channel_setformat,           sbchan_setformat),
  681         KOBJMETHOD(channel_setspeed,            sbchan_setspeed),
  682         KOBJMETHOD(channel_setblocksize,        sbchan_setblocksize),
  683         KOBJMETHOD(channel_trigger,             sbchan_trigger),
  684         KOBJMETHOD(channel_getptr,              sbchan_getptr),
  685         KOBJMETHOD(channel_getcaps,             sbchan_getcaps),
  686         KOBJMETHOD_END
  687 };
  688 CHANNEL_DECLARE(sbchan);
  689 
  690 /************************************************************/
  691 
  692 static int
  693 sb_probe(device_t dev)
  694 {
  695         char buf[64];
  696         uintptr_t func, ver, r, f;
  697 
  698         /* The parent device has already been probed. */
  699         r = BUS_READ_IVAR(device_get_parent(dev), dev, 0, &func);
  700         if (func != SCF_PCM)
  701                 return (ENXIO);
  702 
  703         r = BUS_READ_IVAR(device_get_parent(dev), dev, 1, &ver);
  704         f = (ver & 0xffff0000) >> 16;
  705         ver &= 0x0000ffff;
  706         if ((f & BD_F_ESS) || (ver >= 0x400))
  707                 return (ENXIO);
  708 
  709         snprintf(buf, sizeof buf, "SB DSP %d.%02d", (int) ver >> 8, (int) ver & 0xff);
  710 
  711         device_set_desc_copy(dev, buf);
  712 
  713         return 0;
  714 }
  715 
  716 static int
  717 sb_attach(device_t dev)
  718 {
  719         struct sb_info *sb;
  720         char status[SND_STATUSLEN];
  721         uintptr_t ver;
  722 
  723         sb = malloc(sizeof(*sb), M_DEVBUF, M_WAITOK | M_ZERO);
  724         sb->parent_dev = device_get_parent(dev);
  725         BUS_READ_IVAR(device_get_parent(dev), dev, 1, &ver);
  726         sb->bd_id = ver & 0x0000ffff;
  727         sb->bd_flags = (ver & 0xffff0000) >> 16;
  728         sb->bufsize = pcm_getbuffersize(dev, 4096, SB_DEFAULT_BUFSZ, 65536);
  729 
  730         if (sb_alloc_resources(sb, dev))
  731                 goto no;
  732         if (sb_reset_dsp(sb))
  733                 goto no;
  734         if (mixer_init(dev, (sb->bd_id < 0x300)? &sbmix_mixer_class : &sbpromix_mixer_class, sb))
  735                 goto no;
  736         if (snd_setup_intr(dev, sb->irq, 0, sb_intr, sb, &sb->ih))
  737                 goto no;
  738 
  739         pcm_setflags(dev, pcm_getflags(dev) | SD_F_SIMPLEX);
  740 
  741         if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2,
  742                         /*boundary*/0,
  743                         /*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
  744                         /*highaddr*/BUS_SPACE_MAXADDR,
  745                         /*filter*/NULL, /*filterarg*/NULL,
  746                         /*maxsize*/sb->bufsize, /*nsegments*/1,
  747                         /*maxsegz*/0x3ffff, /*flags*/0,
  748                         /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant,
  749                         &sb->parent_dmat) != 0) {
  750                 device_printf(dev, "unable to create dma tag\n");
  751                 goto no;
  752         }
  753 
  754         snprintf(status, SND_STATUSLEN, "at io 0x%jx irq %jd drq %jd bufsz %u %s",
  755                 rman_get_start(sb->io_base), rman_get_start(sb->irq),
  756                 rman_get_start(sb->drq), sb->bufsize, PCM_KLDSTRING(snd_sb8));
  757 
  758         if (pcm_register(dev, sb, 1, 1))
  759                 goto no;
  760         pcm_addchan(dev, PCMDIR_REC, &sbchan_class, sb);
  761         pcm_addchan(dev, PCMDIR_PLAY, &sbchan_class, sb);
  762 
  763         pcm_setstatus(dev, status);
  764 
  765         return 0;
  766 
  767 no:
  768         sb_release_resources(sb, dev);
  769         return ENXIO;
  770 }
  771 
  772 static int
  773 sb_detach(device_t dev)
  774 {
  775         int r;
  776         struct sb_info *sb;
  777 
  778         r = pcm_unregister(dev);
  779         if (r)
  780                 return r;
  781 
  782         sb = pcm_getdevinfo(dev);
  783         sb_release_resources(sb, dev);
  784         return 0;
  785 }
  786 
  787 static device_method_t sb_methods[] = {
  788         /* Device interface */
  789         DEVMETHOD(device_probe,         sb_probe),
  790         DEVMETHOD(device_attach,        sb_attach),
  791         DEVMETHOD(device_detach,        sb_detach),
  792 
  793         { 0, 0 }
  794 };
  795 
  796 static driver_t sb_driver = {
  797         "pcm",
  798         sb_methods,
  799         PCM_SOFTC_SIZE,
  800 };
  801 
  802 DRIVER_MODULE(snd_sb8, sbc, sb_driver, pcm_devclass, 0, 0);
  803 MODULE_DEPEND(snd_sb8, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
  804 MODULE_DEPEND(snd_sb8, snd_sbc, 1, 1, 1);
  805 MODULE_VERSION(snd_sb8, 1);
  806 
  807 
  808 
  809 

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