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/ess.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 #include <dev/sound/pcm/sound.h>
   33 
   34 #include  <dev/sound/isa/sb.h>
   35 #include  <dev/sound/chip.h>
   36 
   37 #include <isa/isavar.h>
   38 
   39 #include "mixer_if.h"
   40 
   41 SND_DECLARE_FILE("$FreeBSD: releng/7.3/sys/dev/sound/isa/ess.c 170873 2007-06-17 06:10:43Z ariff $");
   42 
   43 #define ESS_BUFFSIZE (4096)
   44 #define ABS(x) (((x) < 0)? -(x) : (x))
   45 
   46 /* audio2 never generates irqs and sounds very noisy */
   47 #undef ESS18XX_DUPLEX
   48 
   49 /* more accurate clocks and split audio1/audio2 rates */
   50 #define ESS18XX_NEWSPEED
   51 
   52 static u_int32_t ess_pfmt[] = {
   53         AFMT_U8,
   54         AFMT_STEREO | AFMT_U8,
   55         AFMT_S8,
   56         AFMT_STEREO | AFMT_S8,
   57         AFMT_S16_LE,
   58         AFMT_STEREO | AFMT_S16_LE,
   59         AFMT_U16_LE,
   60         AFMT_STEREO | AFMT_U16_LE,
   61         0
   62 };
   63 
   64 static struct pcmchan_caps ess_playcaps = {6000, 48000, ess_pfmt, 0};
   65 
   66 static u_int32_t ess_rfmt[] = {
   67         AFMT_U8,
   68         AFMT_STEREO | AFMT_U8,
   69         AFMT_S8,
   70         AFMT_STEREO | AFMT_S8,
   71         AFMT_S16_LE,
   72         AFMT_STEREO | AFMT_S16_LE,
   73         AFMT_U16_LE,
   74         AFMT_STEREO | AFMT_U16_LE,
   75         0
   76 };
   77 
   78 static struct pcmchan_caps ess_reccaps = {6000, 48000, ess_rfmt, 0};
   79 
   80 struct ess_info;
   81 
   82 struct ess_chinfo {
   83         struct ess_info *parent;
   84         struct pcm_channel *channel;
   85         struct snd_dbuf *buffer;
   86         int dir, hwch, stopping, run;
   87         u_int32_t fmt, spd, blksz;
   88 };
   89 
   90 struct ess_info {
   91         device_t parent_dev;
   92         struct resource *io_base;       /* I/O address for the board */
   93         struct resource *irq;
   94         struct resource *drq1;
   95         struct resource *drq2;
   96         void *ih;
   97         bus_dma_tag_t parent_dmat;
   98 
   99         unsigned int bufsize;
  100         int type;
  101         unsigned int duplex:1, newspeed:1;
  102         u_long bd_flags;       /* board-specific flags */
  103         struct ess_chinfo pch, rch;
  104 };
  105 
  106 #if 0
  107 static int ess_rd(struct ess_info *sc, int reg);
  108 static void ess_wr(struct ess_info *sc, int reg, u_int8_t val);
  109 static int ess_dspready(struct ess_info *sc);
  110 static int ess_cmd(struct ess_info *sc, u_char val);
  111 static int ess_cmd1(struct ess_info *sc, u_char cmd, int val);
  112 static int ess_get_byte(struct ess_info *sc);
  113 static void ess_setmixer(struct ess_info *sc, u_int port, u_int value);
  114 static int ess_getmixer(struct ess_info *sc, u_int port);
  115 static int ess_reset_dsp(struct ess_info *sc);
  116 
  117 static int ess_write(struct ess_info *sc, u_char reg, int val);
  118 static int ess_read(struct ess_info *sc, u_char reg);
  119 
  120 static void ess_intr(void *arg);
  121 static int ess_setupch(struct ess_info *sc, int ch, int dir, int spd, u_int32_t fmt, int len);
  122 static int ess_start(struct ess_chinfo *ch);
  123 static int ess_stop(struct ess_chinfo *ch);
  124 #endif
  125 
  126 /*
  127  * Common code for the midi and pcm functions
  128  *
  129  * ess_cmd write a single byte to the CMD port.
  130  * ess_cmd1 write a CMD + 1 byte arg
  131  * ess_cmd2 write a CMD + 2 byte arg
  132  * ess_get_byte returns a single byte from the DSP data port
  133  *
  134  * ess_write is actually ess_cmd1
  135  * ess_read access ext. regs via ess_cmd(0xc0, reg) followed by ess_get_byte
  136  */
  137 
  138 static void
  139 ess_lock(struct ess_info *sc) {
  140 
  141         sbc_lock(device_get_softc(sc->parent_dev));
  142 }
  143 
  144 static void
  145 ess_unlock(struct ess_info *sc) {
  146 
  147         sbc_unlock(device_get_softc(sc->parent_dev));
  148 }
  149 
  150 static int
  151 port_rd(struct resource *port, int off)
  152 {
  153         return bus_space_read_1(rman_get_bustag(port),
  154                                 rman_get_bushandle(port),
  155                                 off);
  156 }
  157 
  158 static void
  159 port_wr(struct resource *port, int off, u_int8_t data)
  160 {
  161         bus_space_write_1(rman_get_bustag(port),
  162                           rman_get_bushandle(port),
  163                           off, data);
  164 }
  165 
  166 static int
  167 ess_rd(struct ess_info *sc, int reg)
  168 {
  169         return port_rd(sc->io_base, reg);
  170 }
  171 
  172 static void
  173 ess_wr(struct ess_info *sc, int reg, u_int8_t val)
  174 {
  175         port_wr(sc->io_base, reg, val);
  176 }
  177 
  178 static int
  179 ess_dspready(struct ess_info *sc)
  180 {
  181         return ((ess_rd(sc, SBDSP_STATUS) & 0x80) == 0);
  182 }
  183 
  184 static int
  185 ess_dspwr(struct ess_info *sc, u_char val)
  186 {
  187         int  i;
  188 
  189         for (i = 0; i < 1000; i++) {
  190                 if (ess_dspready(sc)) {
  191                         ess_wr(sc, SBDSP_CMD, val);
  192                         return 1;
  193                 }
  194                 if (i > 10) DELAY((i > 100)? 1000 : 10);
  195         }
  196         printf("ess_dspwr(0x%02x) timed out.\n", val);
  197         return 0;
  198 }
  199 
  200 static int
  201 ess_cmd(struct ess_info *sc, u_char val)
  202 {
  203 #if 0
  204         printf("ess_cmd: %x\n", val);
  205 #endif
  206         return ess_dspwr(sc, val);
  207 }
  208 
  209 static int
  210 ess_cmd1(struct ess_info *sc, u_char cmd, int val)
  211 {
  212 #if 0
  213         printf("ess_cmd1: %x, %x\n", cmd, val);
  214 #endif
  215         if (ess_dspwr(sc, cmd)) {
  216                 return ess_dspwr(sc, val & 0xff);
  217         } else return 0;
  218 }
  219 
  220 static void
  221 ess_setmixer(struct ess_info *sc, u_int port, u_int value)
  222 {
  223         DEB(printf("ess_setmixer: reg=%x, val=%x\n", port, value);)
  224         ess_wr(sc, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  225         DELAY(10);
  226         ess_wr(sc, SB_MIX_DATA, (u_char) (value & 0xff));
  227         DELAY(10);
  228 }
  229 
  230 static int
  231 ess_getmixer(struct ess_info *sc, u_int port)
  232 {
  233         int val;
  234         ess_wr(sc, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
  235         DELAY(10);
  236         val = ess_rd(sc, SB_MIX_DATA);
  237         DELAY(10);
  238 
  239         return val;
  240 }
  241 
  242 static int
  243 ess_get_byte(struct ess_info *sc)
  244 {
  245         int i;
  246 
  247         for (i = 1000; i > 0; i--) {
  248                 if (ess_rd(sc, DSP_DATA_AVAIL) & 0x80)
  249                         return ess_rd(sc, DSP_READ);
  250                 else
  251                         DELAY(20);
  252         }
  253         return -1;
  254 }
  255 
  256 static int
  257 ess_write(struct ess_info *sc, u_char reg, int val)
  258 {
  259         return ess_cmd1(sc, reg, val);
  260 }
  261 
  262 static int
  263 ess_read(struct ess_info *sc, u_char reg)
  264 {
  265         return (ess_cmd(sc, 0xc0) && ess_cmd(sc, reg))? ess_get_byte(sc) : -1;
  266 }
  267 
  268 static int
  269 ess_reset_dsp(struct ess_info *sc)
  270 {
  271         ess_wr(sc, SBDSP_RST, 3);
  272         DELAY(100);
  273         ess_wr(sc, SBDSP_RST, 0);
  274         if (ess_get_byte(sc) != 0xAA) {
  275                 DEB(printf("ess_reset_dsp 0x%lx failed\n",
  276                            rman_get_start(sc->io_base)));
  277                 return ENXIO;   /* Sorry */
  278         }
  279         ess_cmd(sc, 0xc6);
  280         return 0;
  281 }
  282 
  283 static void
  284 ess_release_resources(struct ess_info *sc, device_t dev)
  285 {
  286         if (sc->irq) {
  287                 if (sc->ih)
  288                         bus_teardown_intr(dev, sc->irq, sc->ih);
  289                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq);
  290                 sc->irq = 0;
  291         }
  292         if (sc->drq1) {
  293                 isa_dma_release(rman_get_start(sc->drq1));
  294                 bus_release_resource(dev, SYS_RES_DRQ, 0, sc->drq1);
  295                 sc->drq1 = 0;
  296         }
  297         if (sc->drq2) {
  298                 isa_dma_release(rman_get_start(sc->drq2));
  299                 bus_release_resource(dev, SYS_RES_DRQ, 1, sc->drq2);
  300                 sc->drq2 = 0;
  301         }
  302         if (sc->io_base) {
  303                 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->io_base);
  304                 sc->io_base = 0;
  305         }
  306         if (sc->parent_dmat) {
  307                 bus_dma_tag_destroy(sc->parent_dmat);
  308                 sc->parent_dmat = 0;
  309         }
  310         free(sc, M_DEVBUF);
  311 }
  312 
  313 static int
  314 ess_alloc_resources(struct ess_info *sc, device_t dev)
  315 {
  316         int rid;
  317 
  318         rid = 0;
  319         if (!sc->io_base)
  320                 sc->io_base = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
  321                                                      &rid, RF_ACTIVE);
  322         rid = 0;
  323         if (!sc->irq)
  324                 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
  325                                                  &rid, RF_ACTIVE);
  326         rid = 0;
  327         if (!sc->drq1)
  328                 sc->drq1 = bus_alloc_resource_any(dev, SYS_RES_DRQ,
  329                                                   &rid, RF_ACTIVE);
  330         rid = 1;
  331         if (!sc->drq2)
  332                 sc->drq2 = bus_alloc_resource_any(dev, SYS_RES_DRQ,
  333                                                   &rid, RF_ACTIVE);
  334 
  335         if (sc->io_base && sc->drq1 && sc->irq) {
  336                 isa_dma_acquire(rman_get_start(sc->drq1));
  337                 isa_dmainit(rman_get_start(sc->drq1), sc->bufsize);
  338 
  339                 if (sc->drq2) {
  340                         isa_dma_acquire(rman_get_start(sc->drq2));
  341                         isa_dmainit(rman_get_start(sc->drq2), sc->bufsize);
  342                 }
  343 
  344                 return 0;
  345         } else return ENXIO;
  346 }
  347 
  348 static void
  349 ess_intr(void *arg)
  350 {
  351         struct ess_info *sc = (struct ess_info *)arg;
  352         int src, pirq, rirq;
  353 
  354         ess_lock(sc);
  355         src = 0;
  356         if (ess_getmixer(sc, 0x7a) & 0x80)
  357                 src |= 2;
  358         if (ess_rd(sc, 0x0c) & 0x01)
  359                 src |= 1;
  360 
  361         pirq = (src & sc->pch.hwch)? 1 : 0;
  362         rirq = (src & sc->rch.hwch)? 1 : 0;
  363 
  364         if (pirq) {
  365                 if (sc->pch.run) {
  366                         ess_unlock(sc);
  367                         chn_intr(sc->pch.channel);
  368                         ess_lock(sc);
  369                 }
  370                 if (sc->pch.stopping) {
  371                         sc->pch.run = 0;
  372                         sndbuf_dma(sc->pch.buffer, PCMTRIG_STOP);
  373                         sc->pch.stopping = 0;
  374                         if (sc->pch.hwch == 1)
  375                                 ess_write(sc, 0xb8, ess_read(sc, 0xb8) & ~0x01);
  376                         else
  377                                 ess_setmixer(sc, 0x78, ess_getmixer(sc, 0x78) & ~0x03);
  378                 }
  379         }
  380 
  381         if (rirq) {
  382                 if (sc->rch.run) {
  383                         ess_unlock(sc);
  384                         chn_intr(sc->rch.channel);
  385                         ess_lock(sc);
  386                 }
  387                 if (sc->rch.stopping) {
  388                         sc->rch.run = 0;
  389                         sndbuf_dma(sc->rch.buffer, PCMTRIG_STOP);
  390                         sc->rch.stopping = 0;
  391                         /* XXX: will this stop audio2? */
  392                         ess_write(sc, 0xb8, ess_read(sc, 0xb8) & ~0x01);
  393                 }
  394         }
  395 
  396         if (src & 2)
  397                 ess_setmixer(sc, 0x7a, ess_getmixer(sc, 0x7a) & ~0x80);
  398         if (src & 1)
  399                 ess_rd(sc, DSP_DATA_AVAIL);
  400         ess_unlock(sc);
  401 }
  402 
  403 /* utility functions for ESS */
  404 static u_int8_t
  405 ess_calcspeed8(int *spd)
  406 {
  407         int speed = *spd;
  408         u_int32_t t;
  409 
  410         if (speed > 22000) {
  411                 t = (795500 + speed / 2) / speed;
  412                 speed = (795500 + t / 2) / t;
  413                 t = (256 - t) | 0x80;
  414         } else {
  415                 t = (397700 + speed / 2) / speed;
  416                 speed = (397700 + t / 2) / t;
  417                 t = 128 - t;
  418         }
  419         *spd = speed;
  420         return t & 0x000000ff;
  421 }
  422 
  423 static u_int8_t
  424 ess_calcspeed9(int *spd)
  425 {
  426         int speed, s0, s1, use0;
  427         u_int8_t t0, t1;
  428 
  429         /* rate = source / (256 - divisor) */
  430         /* divisor = 256 - (source / rate) */
  431         speed = *spd;
  432         t0 = 128 - (793800 / speed);
  433         s0 = 793800 / (128 - t0);
  434 
  435         t1 = 128 - (768000 / speed);
  436         s1 = 768000 / (128 - t1);
  437         t1 |= 0x80;
  438 
  439         use0 = (ABS(speed - s0) < ABS(speed - s1))? 1 : 0;
  440 
  441         *spd = use0? s0 : s1;
  442         return use0? t0 : t1;
  443 }
  444 
  445 static u_int8_t
  446 ess_calcfilter(int spd)
  447 {
  448         int cutoff;
  449 
  450         /* cutoff = 7160000 / (256 - divisor) */
  451         /* divisor = 256 - (7160000 / cutoff) */
  452         cutoff = (spd * 9 * 82) / 20;
  453         return (256 - (7160000 / cutoff));
  454 }
  455 
  456 static int
  457 ess_setupch(struct ess_info *sc, int ch, int dir, int spd, u_int32_t fmt, int len)
  458 {
  459         int play = (dir == PCMDIR_PLAY)? 1 : 0;
  460         int b16 = (fmt & AFMT_16BIT)? 1 : 0;
  461         int stereo = (fmt & AFMT_STEREO)? 1 : 0;
  462         int unsign = (fmt == AFMT_U8 || fmt == AFMT_U16_LE)? 1 : 0;
  463         u_int8_t spdval, fmtval;
  464 
  465 
  466         spdval = (sc->newspeed)? ess_calcspeed9(&spd) : ess_calcspeed8(&spd);
  467         len = -len;
  468 
  469         if (ch == 1) {
  470                 KASSERT((dir == PCMDIR_PLAY) || (dir == PCMDIR_REC), ("ess_setupch: dir1 bad"));
  471                 /* transfer length low */
  472                 ess_write(sc, 0xa4, len & 0x00ff);
  473                 /* transfer length high */
  474                 ess_write(sc, 0xa5, (len & 0xff00) >> 8);
  475                 /* autoinit, dma dir */
  476                 ess_write(sc, 0xb8, 0x04 | (play? 0x00 : 0x0a));
  477                 /* mono/stereo */
  478                 ess_write(sc, 0xa8, (ess_read(sc, 0xa8) & ~0x03) | (stereo? 0x01 : 0x02));
  479                 /* demand mode, 4 bytes/xfer */
  480                 ess_write(sc, 0xb9, 0x02);
  481                 /* sample rate */
  482                 ess_write(sc, 0xa1, spdval);
  483                 /* filter cutoff */
  484                 ess_write(sc, 0xa2, ess_calcfilter(spd));
  485                 /* setup dac/adc */
  486                 if (play)
  487                         ess_write(sc, 0xb6, unsign? 0x80 : 0x00);
  488                 /* mono, b16: signed, load signal */
  489                 ess_write(sc, 0xb7, 0x51 | (unsign? 0x00 : 0x20));
  490                 /* setup fifo */
  491                 ess_write(sc, 0xb7, 0x90 | (unsign? 0x00 : 0x20) |
  492                                            (b16? 0x04 : 0x00) |
  493                                            (stereo? 0x08 : 0x40));
  494                 /* irq control */
  495                 ess_write(sc, 0xb1, (ess_read(sc, 0xb1) & 0x0f) | 0x50);
  496                 /* drq control */
  497                 ess_write(sc, 0xb2, (ess_read(sc, 0xb2) & 0x0f) | 0x50);
  498         } else if (ch == 2) {
  499                 KASSERT(dir == PCMDIR_PLAY, ("ess_setupch: dir2 bad"));
  500                 /* transfer length low */
  501                 ess_setmixer(sc, 0x74, len & 0x00ff);
  502                 /* transfer length high */
  503                 ess_setmixer(sc, 0x76, (len & 0xff00) >> 8);
  504                 /* autoinit, 4 bytes/req */
  505                 ess_setmixer(sc, 0x78, 0x90);
  506                 fmtval = b16 | (stereo << 1) | (unsign << 2);
  507                 /* enable irq, set format */
  508                 ess_setmixer(sc, 0x7a, 0x40 | fmtval);
  509                 if (sc->newspeed) {
  510                         /* sample rate */
  511                         ess_setmixer(sc, 0x70, spdval);
  512                         /* filter cutoff */
  513                         ess_setmixer(sc, 0x72, ess_calcfilter(spd));
  514                 }
  515         }
  516 
  517         return 0;
  518 }
  519 static int
  520 ess_start(struct ess_chinfo *ch)
  521 {
  522         struct ess_info *sc = ch->parent;
  523         int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  524 
  525         ess_lock(sc);
  526         ess_setupch(sc, ch->hwch, ch->dir, ch->spd, ch->fmt, ch->blksz);
  527         ch->stopping = 0;
  528         if (ch->hwch == 1)
  529                 ess_write(sc, 0xb8, ess_read(sc, 0xb8) | 0x01);
  530         else
  531                 ess_setmixer(sc, 0x78, ess_getmixer(sc, 0x78) | 0x03);
  532         if (play)
  533                 ess_cmd(sc, DSP_CMD_SPKON);
  534         ess_unlock(sc);
  535         return 0;
  536 }
  537 
  538 static int
  539 ess_stop(struct ess_chinfo *ch)
  540 {
  541         struct ess_info *sc = ch->parent;
  542         int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
  543 
  544         ess_lock(sc);
  545         ch->stopping = 1;
  546         if (ch->hwch == 1)
  547                 ess_write(sc, 0xb8, ess_read(sc, 0xb8) & ~0x04);
  548         else
  549                 ess_setmixer(sc, 0x78, ess_getmixer(sc, 0x78) & ~0x10);
  550         if (play)
  551                 ess_cmd(sc, DSP_CMD_SPKOFF);
  552         ess_unlock(sc);
  553         return 0;
  554 }
  555 
  556 /* -------------------------------------------------------------------- */
  557 /* channel interface for ESS18xx */
  558 static void *
  559 esschan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
  560 {
  561         struct ess_info *sc = devinfo;
  562         struct ess_chinfo *ch = (dir == PCMDIR_PLAY)? &sc->pch : &sc->rch;
  563 
  564         ch->parent = sc;
  565         ch->channel = c;
  566         ch->buffer = b;
  567         if (sndbuf_alloc(ch->buffer, sc->parent_dmat, 0, sc->bufsize) != 0)
  568                 return NULL;
  569         ch->dir = dir;
  570         ch->hwch = 1;
  571         if ((dir == PCMDIR_PLAY) && (sc->duplex))
  572                 ch->hwch = 2;
  573         sndbuf_dmasetup(ch->buffer, (ch->hwch == 1)? sc->drq1 : sc->drq2);
  574         return ch;
  575 }
  576 
  577 static int
  578 esschan_setformat(kobj_t obj, void *data, u_int32_t format)
  579 {
  580         struct ess_chinfo *ch = data;
  581 
  582         ch->fmt = format;
  583         return 0;
  584 }
  585 
  586 static int
  587 esschan_setspeed(kobj_t obj, void *data, u_int32_t speed)
  588 {
  589         struct ess_chinfo *ch = data;
  590         struct ess_info *sc = ch->parent;
  591 
  592         ch->spd = speed;
  593         if (sc->newspeed)
  594                 ess_calcspeed9(&ch->spd);
  595         else
  596                 ess_calcspeed8(&ch->spd);
  597         return ch->spd;
  598 }
  599 
  600 static int
  601 esschan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
  602 {
  603         struct ess_chinfo *ch = data;
  604 
  605         ch->blksz = blocksize;
  606         return ch->blksz;
  607 }
  608 
  609 static int
  610 esschan_trigger(kobj_t obj, void *data, int go)
  611 {
  612         struct ess_chinfo *ch = data;
  613 
  614         if (!PCMTRIG_COMMON(go))
  615                 return 0;
  616 
  617         switch (go) {
  618         case PCMTRIG_START:
  619                 ch->run = 1;
  620                 sndbuf_dma(ch->buffer, go);
  621                 ess_start(ch);
  622                 break;
  623 
  624         case PCMTRIG_STOP:
  625         case PCMTRIG_ABORT:
  626         default:
  627                 ess_stop(ch);
  628                 break;
  629         }
  630         return 0;
  631 }
  632 
  633 static int
  634 esschan_getptr(kobj_t obj, void *data)
  635 {
  636         struct ess_chinfo *ch = data;
  637 
  638         return sndbuf_dmaptr(ch->buffer);
  639 }
  640 
  641 static struct pcmchan_caps *
  642 esschan_getcaps(kobj_t obj, void *data)
  643 {
  644         struct ess_chinfo *ch = data;
  645 
  646         return (ch->dir == PCMDIR_PLAY)? &ess_playcaps : &ess_reccaps;
  647 }
  648 
  649 static kobj_method_t esschan_methods[] = {
  650         KOBJMETHOD(channel_init,                esschan_init),
  651         KOBJMETHOD(channel_setformat,           esschan_setformat),
  652         KOBJMETHOD(channel_setspeed,            esschan_setspeed),
  653         KOBJMETHOD(channel_setblocksize,        esschan_setblocksize),
  654         KOBJMETHOD(channel_trigger,             esschan_trigger),
  655         KOBJMETHOD(channel_getptr,              esschan_getptr),
  656         KOBJMETHOD(channel_getcaps,             esschan_getcaps),
  657         { 0, 0 }
  658 };
  659 CHANNEL_DECLARE(esschan);
  660 
  661 /************************************************************/
  662 
  663 static int
  664 essmix_init(struct snd_mixer *m)
  665 {
  666         struct ess_info *sc = mix_getdevinfo(m);
  667 
  668         mix_setrecdevs(m, SOUND_MASK_CD | SOUND_MASK_MIC | SOUND_MASK_LINE |
  669                           SOUND_MASK_IMIX);
  670 
  671         mix_setdevs(m, SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_LINE |
  672                        SOUND_MASK_MIC | SOUND_MASK_CD | SOUND_MASK_VOLUME |
  673                        SOUND_MASK_LINE1 | SOUND_MASK_SPEAKER);
  674 
  675         ess_setmixer(sc, 0, 0); /* reset */
  676 
  677         return 0;
  678 }
  679 
  680 static int
  681 essmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
  682 {
  683         struct ess_info *sc = mix_getdevinfo(m);
  684         int preg = 0, rreg = 0, l, r;
  685 
  686         l = (left * 15) / 100;
  687         r = (right * 15) / 100;
  688         switch (dev) {
  689         case SOUND_MIXER_SYNTH:
  690                 preg = 0x36;
  691                 rreg = 0x6b;
  692                 break;
  693 
  694         case SOUND_MIXER_PCM:
  695                 preg = 0x14;
  696                 rreg = 0x7c;
  697                 break;
  698 
  699         case SOUND_MIXER_LINE:
  700                 preg = 0x3e;
  701                 rreg = 0x6e;
  702                 break;
  703 
  704         case SOUND_MIXER_MIC:
  705                 preg = 0x1a;
  706                 rreg = 0x68;
  707                 break;
  708 
  709         case SOUND_MIXER_LINE1:
  710                 preg = 0x3a;
  711                 rreg = 0x6c;
  712                 break;
  713 
  714         case SOUND_MIXER_CD:
  715                 preg = 0x38;
  716                 rreg = 0x6a;
  717                 break;
  718 
  719         case SOUND_MIXER_SPEAKER:
  720                 preg = 0x3c;
  721                 break;
  722 
  723         case SOUND_MIXER_VOLUME:
  724                 l = left? (left * 63) / 100 : 64;
  725                 r = right? (right * 63) / 100 : 64;
  726                 ess_setmixer(sc, 0x60, l);
  727                 ess_setmixer(sc, 0x62, r);
  728                 left = (l == 64)? 0 : (l * 100) / 63;
  729                 right = (r == 64)? 0 : (r * 100) / 63;
  730                 return left | (right << 8);
  731         }
  732 
  733         if (preg)
  734                 ess_setmixer(sc, preg, (l << 4) | r);
  735         if (rreg)
  736                 ess_setmixer(sc, rreg, (l << 4) | r);
  737 
  738         left = (l * 100) / 15;
  739         right = (r * 100) / 15;
  740 
  741         return left | (right << 8);
  742 }
  743 
  744 static int
  745 essmix_setrecsrc(struct snd_mixer *m, u_int32_t src)
  746 {
  747         struct ess_info *sc = mix_getdevinfo(m);
  748         u_char recdev;
  749 
  750         switch (src) {
  751         case SOUND_MASK_CD:
  752                 recdev = 0x02;
  753                 break;
  754 
  755         case SOUND_MASK_LINE:
  756                 recdev = 0x06;
  757                 break;
  758 
  759         case SOUND_MASK_IMIX:
  760                 recdev = 0x05;
  761                 break;
  762 
  763         case SOUND_MASK_MIC:
  764         default:
  765                 recdev = 0x00;
  766                 src = SOUND_MASK_MIC;
  767                 break;
  768         }
  769 
  770         ess_setmixer(sc, 0x1c, recdev);
  771 
  772         return src;
  773 }
  774 
  775 static kobj_method_t essmixer_methods[] = {
  776         KOBJMETHOD(mixer_init,          essmix_init),
  777         KOBJMETHOD(mixer_set,           essmix_set),
  778         KOBJMETHOD(mixer_setrecsrc,     essmix_setrecsrc),
  779         { 0, 0 }
  780 };
  781 MIXER_DECLARE(essmixer);
  782 
  783 /************************************************************/
  784 
  785 static int
  786 ess_probe(device_t dev)
  787 {
  788         uintptr_t func, ver, r, f;
  789 
  790         /* The parent device has already been probed. */
  791         r = BUS_READ_IVAR(device_get_parent(dev), dev, 0, &func);
  792         if (func != SCF_PCM)
  793                 return (ENXIO);
  794 
  795         r = BUS_READ_IVAR(device_get_parent(dev), dev, 1, &ver);
  796         f = (ver & 0xffff0000) >> 16;
  797         if (!(f & BD_F_ESS))
  798                 return (ENXIO);
  799 
  800         device_set_desc(dev, "ESS 18xx DSP");
  801 
  802         return 0;
  803 }
  804 
  805 static int
  806 ess_attach(device_t dev)
  807 {
  808         struct ess_info *sc;
  809         char status[SND_STATUSLEN], buf[64];
  810         int ver;
  811 
  812         sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
  813         sc->parent_dev = device_get_parent(dev);
  814         sc->bufsize = pcm_getbuffersize(dev, 4096, ESS_BUFFSIZE, 65536);
  815         if (ess_alloc_resources(sc, dev))
  816                 goto no;
  817         if (ess_reset_dsp(sc))
  818                 goto no;
  819         if (mixer_init(dev, &essmixer_class, sc))
  820                 goto no;
  821 
  822         sc->duplex = 0;
  823         sc->newspeed = 0;
  824         ver = (ess_getmixer(sc, 0x40) << 8) | ess_rd(sc, SB_MIX_DATA);
  825         snprintf(buf, sizeof buf, "ESS %x DSP", ver);
  826         device_set_desc_copy(dev, buf);
  827         if (bootverbose)
  828                 device_printf(dev, "ESS%x detected", ver);
  829 
  830         switch (ver) {
  831         case 0x1869:
  832         case 0x1879:
  833 #ifdef ESS18XX_DUPLEX
  834                 sc->duplex = sc->drq2? 1 : 0;
  835 #endif
  836 #ifdef ESS18XX_NEWSPEED
  837                 sc->newspeed = 1;
  838 #endif
  839                 break;
  840         }
  841         if (bootverbose)
  842                 printf("%s%s\n", sc->duplex? ", duplex" : "",
  843                                  sc->newspeed? ", newspeed" : "");
  844 
  845         if (sc->newspeed)
  846                 ess_setmixer(sc, 0x71, 0x22);
  847 
  848         snd_setup_intr(dev, sc->irq, 0, ess_intr, sc, &sc->ih);
  849         if (!sc->duplex)
  850                 pcm_setflags(dev, pcm_getflags(dev) | SD_F_SIMPLEX);
  851 
  852         if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2,
  853                         /*boundary*/0,
  854                         /*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
  855                         /*highaddr*/BUS_SPACE_MAXADDR,
  856                         /*filter*/NULL, /*filterarg*/NULL,
  857                         /*maxsize*/sc->bufsize, /*nsegments*/1,
  858                         /*maxsegz*/0x3ffff,
  859                         /*flags*/0, /*lockfunc*/busdma_lock_mutex,
  860                         /*lockarg*/&Giant, &sc->parent_dmat) != 0) {
  861                 device_printf(dev, "unable to create dma tag\n");
  862                 goto no;
  863         }
  864 
  865         if (sc->drq2)
  866                 snprintf(buf, SND_STATUSLEN, ":%ld", rman_get_start(sc->drq2));
  867         else
  868                 buf[0] = '\0';
  869 
  870         snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld drq %ld%s bufsz %u %s",
  871                 rman_get_start(sc->io_base), rman_get_start(sc->irq),
  872                 rman_get_start(sc->drq1), buf, sc->bufsize,
  873                 PCM_KLDSTRING(snd_ess));
  874 
  875         if (pcm_register(dev, sc, 1, 1))
  876                 goto no;
  877         pcm_addchan(dev, PCMDIR_REC, &esschan_class, sc);
  878         pcm_addchan(dev, PCMDIR_PLAY, &esschan_class, sc);
  879         pcm_setstatus(dev, status);
  880 
  881         return 0;
  882 
  883 no:
  884         ess_release_resources(sc, dev);
  885         return ENXIO;
  886 }
  887 
  888 static int
  889 ess_detach(device_t dev)
  890 {
  891         int r;
  892         struct ess_info *sc;
  893 
  894         r = pcm_unregister(dev);
  895         if (r)
  896                 return r;
  897 
  898         sc = pcm_getdevinfo(dev);
  899         ess_release_resources(sc, dev);
  900         return 0;
  901 }
  902 
  903 static int
  904 ess_resume(device_t dev)
  905 {
  906         struct ess_info *sc;
  907 
  908         sc = pcm_getdevinfo(dev);
  909 
  910         if (ess_reset_dsp(sc)) {
  911                 device_printf(dev, "unable to reset DSP at resume\n");
  912                 return ENXIO;
  913         }
  914 
  915         if (mixer_reinit(dev)) {
  916                 device_printf(dev, "unable to reinitialize mixer at resume\n");
  917                 return ENXIO;
  918         }
  919 
  920         return 0;
  921 }
  922 
  923 static device_method_t ess_methods[] = {
  924         /* Device interface */
  925         DEVMETHOD(device_probe,         ess_probe),
  926         DEVMETHOD(device_attach,        ess_attach),
  927         DEVMETHOD(device_detach,        ess_detach),
  928         DEVMETHOD(device_resume,        ess_resume),
  929 
  930         { 0, 0 }
  931 };
  932 
  933 static driver_t ess_driver = {
  934         "pcm",
  935         ess_methods,
  936         PCM_SOFTC_SIZE,
  937 };
  938 
  939 DRIVER_MODULE(snd_ess, sbc, ess_driver, pcm_devclass, 0, 0);
  940 MODULE_DEPEND(snd_ess, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
  941 MODULE_DEPEND(snd_ess, snd_sbc, 1, 1, 1);
  942 MODULE_VERSION(snd_ess, 1);
  943 
  944 /************************************************************/
  945 
  946 static devclass_t esscontrol_devclass;
  947 
  948 static struct isa_pnp_id essc_ids[] = {
  949         {0x06007316, "ESS Control"},
  950         {0}
  951 };
  952 
  953 static int
  954 esscontrol_probe(device_t dev)
  955 {
  956         int i;
  957 
  958         i = ISA_PNP_PROBE(device_get_parent(dev), dev, essc_ids);
  959         if (i == 0)
  960                 device_quiet(dev);
  961         return i;
  962 }
  963 
  964 static int
  965 esscontrol_attach(device_t dev)
  966 {
  967 #ifdef notyet
  968         struct resource *io;
  969         int rid, i, x;
  970 
  971         rid = 0;
  972         io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
  973         x = 0;
  974         for (i = 0; i < 0x100; i++) {
  975                 port_wr(io, 0, i);
  976                 x = port_rd(io, 1);
  977                 if ((i & 0x0f) == 0)
  978                         printf("%3.3x: ", i);
  979                 printf("%2.2x ", x);
  980                 if ((i & 0x0f) == 0x0f)
  981                         printf("\n");
  982         }
  983         bus_release_resource(dev, SYS_RES_IOPORT, 0, io);
  984         io = NULL;
  985 #endif
  986 
  987         return 0;
  988 }
  989 
  990 static int
  991 esscontrol_detach(device_t dev)
  992 {
  993         return 0;
  994 }
  995 
  996 static device_method_t esscontrol_methods[] = {
  997         /* Device interface */
  998         DEVMETHOD(device_probe,         esscontrol_probe),
  999         DEVMETHOD(device_attach,        esscontrol_attach),
 1000         DEVMETHOD(device_detach,        esscontrol_detach),
 1001 
 1002         { 0, 0 }
 1003 };
 1004 
 1005 static driver_t esscontrol_driver = {
 1006         "esscontrol",
 1007         esscontrol_methods,
 1008         1,
 1009 };
 1010 
 1011 DRIVER_MODULE(esscontrol, isa, esscontrol_driver, esscontrol_devclass, 0, 0);
 1012 DRIVER_MODULE(esscontrol, acpi, esscontrol_driver, esscontrol_devclass, 0, 0);

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