Home | History | Annotate | Line # | Download | only in isa
ess.c revision 1.82
      1 /*	$NetBSD: ess.c,v 1.82 2014/08/16 13:01:33 nakayama Exp $	*/
      2 
      3 /*
      4  * Copyright 1997
      5  * Digital Equipment Corporation. All rights reserved.
      6  *
      7  * This software is furnished under license and may be used and
      8  * copied only in accordance with the following terms and conditions.
      9  * Subject to these conditions, you may download, copy, install,
     10  * use, modify and distribute this software in source and/or binary
     11  * form. No title or ownership is transferred hereby.
     12  *
     13  * 1) Any source code used, modified or distributed must reproduce
     14  *    and retain this copyright notice and list of conditions as
     15  *    they appear in the source file.
     16  *
     17  * 2) No right is granted to use any trade name, trademark, or logo of
     18  *    Digital Equipment Corporation. Neither the "Digital Equipment
     19  *    Corporation" name nor any trademark or logo of Digital Equipment
     20  *    Corporation may be used to endorse or promote products derived
     21  *    from this software without the prior written permission of
     22  *    Digital Equipment Corporation.
     23  *
     24  * 3) This software is provided "AS-IS" and any express or implied
     25  *    warranties, including but not limited to, any implied warranties
     26  *    of merchantability, fitness for a particular purpose, or
     27  *    non-infringement are disclaimed. In no event shall DIGITAL be
     28  *    liable for any damages whatsoever, and in particular, DIGITAL
     29  *    shall not be liable for special, indirect, consequential, or
     30  *    incidental damages or damages for lost profits, loss of
     31  *    revenue or loss of use, whether such damages arise in contract,
     32  *    negligence, tort, under statute, in equity, at law or otherwise,
     33  *    even if advised of the possibility of such damage.
     34  */
     35 
     36 /*
     37 **++
     38 **
     39 **  ess.c
     40 **
     41 **  FACILITY:
     42 **
     43 **	DIGITAL Network Appliance Reference Design (DNARD)
     44 **
     45 **  MODULE DESCRIPTION:
     46 **
     47 **      This module contains the device driver for the ESS
     48 **      Technologies 1888/1887/888 sound chip. The code in sbdsp.c was
     49 **	used as a reference point when implementing this driver.
     50 **
     51 **  AUTHORS:
     52 **
     53 **	Blair Fidler	Software Engineering Australia
     54 **			Gold Coast, Australia.
     55 **
     56 **  CREATION DATE:
     57 **
     58 **	March 10, 1997.
     59 **
     60 **  MODIFICATION HISTORY:
     61 **
     62 **	Heavily modified by Lennart Augustsson and Charles M. Hannum for
     63 **	bus_dma, changes to audio interface, and many bug fixes.
     64 **	ESS1788 support by Nathan J. Williams and Charles M. Hannum.
     65 **--
     66 */
     67 
     68 #include <sys/cdefs.h>
     69 __KERNEL_RCSID(0, "$NetBSD: ess.c,v 1.82 2014/08/16 13:01:33 nakayama Exp $");
     70 
     71 #include <sys/param.h>
     72 #include <sys/systm.h>
     73 #include <sys/errno.h>
     74 #include <sys/ioctl.h>
     75 #include <sys/syslog.h>
     76 #include <sys/device.h>
     77 #include <sys/proc.h>
     78 #include <sys/kernel.h>
     79 #include <sys/cpu.h>
     80 #include <sys/intr.h>
     81 #include <sys/bus.h>
     82 #include <sys/audioio.h>
     83 #include <sys/malloc.h>
     84 
     85 #include <dev/audio_if.h>
     86 #include <dev/auconv.h>
     87 #include <dev/mulaw.h>
     88 
     89 #include <dev/isa/isavar.h>
     90 #include <dev/isa/isadmavar.h>
     91 
     92 #include <dev/isa/essvar.h>
     93 #include <dev/isa/essreg.h>
     94 
     95 #include "joy_ess.h"
     96 
     97 #ifdef AUDIO_DEBUG
     98 #define DPRINTF(x)	if (essdebug) printf x
     99 #define DPRINTFN(n,x)	if (essdebug>(n)) printf x
    100 int	essdebug = 0;
    101 #else
    102 #define DPRINTF(x)
    103 #define DPRINTFN(n,x)
    104 #endif
    105 
    106 #if 0
    107 unsigned uuu;
    108 #define EREAD1(t, h, a) (uuu=bus_space_read_1(t, h, a),printf("EREAD  %02x=%02x\n", ((int)h&0xfff)+a, uuu),uuu)
    109 #define EWRITE1(t, h, a, d) (printf("EWRITE %02x=%02x\n", ((int)h & 0xfff)+a, d), bus_space_write_1(t, h, a, d))
    110 #else
    111 #define EREAD1(t, h, a) bus_space_read_1(t, h, a)
    112 #define EWRITE1(t, h, a, d) bus_space_write_1(t, h, a, d)
    113 #endif
    114 
    115 
    116 int	ess_setup_sc(struct ess_softc *, int);
    117 
    118 int	ess_open(void *, int);
    119 void	ess_close(void *);
    120 int	ess_getdev(void *, struct audio_device *);
    121 int	ess_drain(void *);
    122 
    123 int	ess_query_encoding(void *, struct audio_encoding *);
    124 
    125 int	ess_set_params(void *, int, int, audio_params_t *,
    126 	    audio_params_t *, stream_filter_list_t *, stream_filter_list_t *);
    127 
    128 int	ess_round_blocksize(void *, int, int, const audio_params_t *);
    129 
    130 int	ess_audio1_trigger_output(void *, void *, void *, int,
    131 	    void (*)(void *), void *, const audio_params_t *);
    132 int	ess_audio2_trigger_output(void *, void *, void *, int,
    133 	    void (*)(void *), void *, const audio_params_t *);
    134 int	ess_audio1_trigger_input(void *, void *, void *, int,
    135 	    void (*)(void *), void *, const audio_params_t *);
    136 int	ess_audio1_halt(void *);
    137 int	ess_audio2_halt(void *);
    138 int	ess_audio1_intr(void *);
    139 int	ess_audio2_intr(void *);
    140 void	ess_audio1_poll(void *);
    141 void	ess_audio2_poll(void *);
    142 
    143 int	ess_speaker_ctl(void *, int);
    144 
    145 int	ess_getdev(void *, struct audio_device *);
    146 
    147 int	ess_set_port(void *, mixer_ctrl_t *);
    148 int	ess_get_port(void *, mixer_ctrl_t *);
    149 
    150 void   *ess_malloc(void *, int, size_t);
    151 void	ess_free(void *, void *, size_t);
    152 size_t	ess_round_buffersize(void *, int, size_t);
    153 paddr_t	ess_mappage(void *, void *, off_t, int);
    154 
    155 
    156 int	ess_query_devinfo(void *, mixer_devinfo_t *);
    157 int	ess_1788_get_props(void *);
    158 int	ess_1888_get_props(void *);
    159 void	ess_get_locks(void *, kmutex_t **, kmutex_t **);
    160 
    161 void	ess_speaker_on(struct ess_softc *);
    162 void	ess_speaker_off(struct ess_softc *);
    163 
    164 void	ess_config_irq(struct ess_softc *);
    165 void	ess_config_drq(struct ess_softc *);
    166 void	ess_setup(struct ess_softc *);
    167 int	ess_identify(struct ess_softc *);
    168 
    169 int	ess_reset(struct ess_softc *);
    170 void	ess_set_gain(struct ess_softc *, int, int);
    171 int	ess_set_in_port(struct ess_softc *, int);
    172 int	ess_set_in_ports(struct ess_softc *, int);
    173 u_int	ess_srtotc(struct ess_softc *, u_int);
    174 u_int	ess_srtofc(u_int);
    175 u_char	ess_get_dsp_status(struct ess_softc *);
    176 u_char	ess_dsp_read_ready(struct ess_softc *);
    177 u_char	ess_dsp_write_ready(struct ess_softc *);
    178 int	ess_rdsp(struct ess_softc *);
    179 int	ess_wdsp(struct ess_softc *, u_char);
    180 u_char	ess_read_x_reg(struct ess_softc *, u_char);
    181 int	ess_write_x_reg(struct ess_softc *, u_char, u_char);
    182 void	ess_clear_xreg_bits(struct ess_softc *, u_char, u_char);
    183 void	ess_set_xreg_bits(struct ess_softc *, u_char, u_char);
    184 u_char	ess_read_mix_reg(struct ess_softc *, u_char);
    185 void	ess_write_mix_reg(struct ess_softc *, u_char, u_char);
    186 void	ess_clear_mreg_bits(struct ess_softc *, u_char, u_char);
    187 void	ess_set_mreg_bits(struct ess_softc *, u_char, u_char);
    188 void	ess_read_multi_mix_reg(struct ess_softc *, u_char, u_int8_t *, bus_size_t);
    189 
    190 static const char *essmodel[] = {
    191 	"unsupported",
    192 
    193 	"688",
    194 	"1688",
    195 	"1788",
    196 	"1868",
    197 	"1869",
    198 	"1878",
    199 	"1879",
    200 
    201 	"888",
    202 	"1887",
    203 	"1888",
    204 };
    205 
    206 struct audio_device ess_device = {
    207 	"ESS Technology",
    208 	"x",
    209 	"ess"
    210 };
    211 
    212 /*
    213  * Define our interface to the higher level audio driver.
    214  */
    215 
    216 const struct audio_hw_if ess_1788_hw_if = {
    217 	ess_open,
    218 	ess_close,
    219 	ess_drain,
    220 	ess_query_encoding,
    221 	ess_set_params,
    222 	ess_round_blocksize,
    223 	NULL,
    224 	NULL,
    225 	NULL,
    226 	NULL,
    227 	NULL,
    228 	ess_audio1_halt,
    229 	ess_audio1_halt,
    230 	ess_speaker_ctl,
    231 	ess_getdev,
    232 	NULL,
    233 	ess_set_port,
    234 	ess_get_port,
    235 	ess_query_devinfo,
    236 	ess_malloc,
    237 	ess_free,
    238 	ess_round_buffersize,
    239 	ess_mappage,
    240 	ess_1788_get_props,
    241 	ess_audio1_trigger_output,
    242 	ess_audio1_trigger_input,
    243 	NULL,
    244 	ess_get_locks,
    245 };
    246 
    247 const struct audio_hw_if ess_1888_hw_if = {
    248 	ess_open,
    249 	ess_close,
    250 	ess_drain,
    251 	ess_query_encoding,
    252 	ess_set_params,
    253 	ess_round_blocksize,
    254 	NULL,
    255 	NULL,
    256 	NULL,
    257 	NULL,
    258 	NULL,
    259 	ess_audio2_halt,
    260 	ess_audio1_halt,
    261 	ess_speaker_ctl,
    262 	ess_getdev,
    263 	NULL,
    264 	ess_set_port,
    265 	ess_get_port,
    266 	ess_query_devinfo,
    267 	ess_malloc,
    268 	ess_free,
    269 	ess_round_buffersize,
    270 	ess_mappage,
    271 	ess_1888_get_props,
    272 	ess_audio2_trigger_output,
    273 	ess_audio1_trigger_input,
    274 	NULL,
    275 	ess_get_locks,
    276 };
    277 
    278 #define ESS_NFORMATS	8
    279 static const struct audio_format ess_formats[ESS_NFORMATS] = {
    280 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    281 	 2, AUFMT_STEREO, 0, {ESS_MINRATE, ESS_MAXRATE}},
    282 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    283 	 1, AUFMT_MONAURAL, 0, {ESS_MINRATE, ESS_MAXRATE}},
    284 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 16, 16,
    285 	 2, AUFMT_STEREO, 0, {ESS_MINRATE, ESS_MAXRATE}},
    286 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 16, 16,
    287 	 1, AUFMT_MONAURAL, 0, {ESS_MINRATE, ESS_MAXRATE}},
    288 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 8, 8,
    289 	 2, AUFMT_STEREO, 0, {ESS_MINRATE, ESS_MAXRATE}},
    290 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 8, 8,
    291 	 1, AUFMT_MONAURAL, 0, {ESS_MINRATE, ESS_MAXRATE}},
    292 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
    293 	 2, AUFMT_STEREO, 0, {ESS_MINRATE, ESS_MAXRATE}},
    294 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
    295 	 1, AUFMT_MONAURAL, 0, {ESS_MINRATE, ESS_MAXRATE}},
    296 };
    297 
    298 #ifdef AUDIO_DEBUG
    299 void ess_printsc(struct ess_softc *);
    300 void ess_dump_mixer(struct ess_softc *);
    301 
    302 void
    303 ess_printsc(struct ess_softc *sc)
    304 {
    305 	int i;
    306 
    307 	printf("iobase 0x%x outport %u inport %u speaker %s\n",
    308 	       sc->sc_iobase, sc->out_port,
    309 	       sc->in_port, sc->spkr_state ? "on" : "off");
    310 
    311 	printf("audio1: DMA chan %d irq %d nintr %lu intr %p arg %p\n",
    312 	       sc->sc_audio1.drq, sc->sc_audio1.irq, sc->sc_audio1.nintr,
    313 	       sc->sc_audio1.intr, sc->sc_audio1.arg);
    314 
    315 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
    316 		printf("audio2: DMA chan %d irq %d nintr %lu intr %p arg %p\n",
    317 		       sc->sc_audio2.drq, sc->sc_audio2.irq, sc->sc_audio2.nintr,
    318 		       sc->sc_audio2.intr, sc->sc_audio2.arg);
    319 	}
    320 
    321 	printf("gain:");
    322 	for (i = 0; i < sc->ndevs; i++)
    323 		printf(" %u,%u", sc->gain[i][ESS_LEFT], sc->gain[i][ESS_RIGHT]);
    324 	printf("\n");
    325 }
    326 
    327 void
    328 ess_dump_mixer(struct ess_softc *sc)
    329 {
    330 
    331 	printf("ESS_DAC_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    332 	       0x7C, ess_read_mix_reg(sc, 0x7C));
    333 	printf("ESS_MIC_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    334 	       0x1A, ess_read_mix_reg(sc, 0x1A));
    335 	printf("ESS_LINE_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    336 	       0x3E, ess_read_mix_reg(sc, 0x3E));
    337 	printf("ESS_SYNTH_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    338 	       0x36, ess_read_mix_reg(sc, 0x36));
    339 	printf("ESS_CD_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    340 	       0x38, ess_read_mix_reg(sc, 0x38));
    341 	printf("ESS_AUXB_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    342 	       0x3A, ess_read_mix_reg(sc, 0x3A));
    343 	printf("ESS_MASTER_VOL: mix reg 0x%02x=0x%02x\n",
    344 	       0x32, ess_read_mix_reg(sc, 0x32));
    345 	printf("ESS_PCSPEAKER_VOL: mix reg 0x%02x=0x%02x\n",
    346 	       0x3C, ess_read_mix_reg(sc, 0x3C));
    347 	printf("ESS_DAC_REC_VOL: mix reg 0x%02x=0x%02x\n",
    348 	       0x69, ess_read_mix_reg(sc, 0x69));
    349 	printf("ESS_MIC_REC_VOL: mix reg 0x%02x=0x%02x\n",
    350 	       0x68, ess_read_mix_reg(sc, 0x68));
    351 	printf("ESS_LINE_REC_VOL: mix reg 0x%02x=0x%02x\n",
    352 	       0x6E, ess_read_mix_reg(sc, 0x6E));
    353 	printf("ESS_SYNTH_REC_VOL: mix reg 0x%02x=0x%02x\n",
    354 	       0x6B, ess_read_mix_reg(sc, 0x6B));
    355 	printf("ESS_CD_REC_VOL: mix reg 0x%02x=0x%02x\n",
    356 	       0x6A, ess_read_mix_reg(sc, 0x6A));
    357 	printf("ESS_AUXB_REC_VOL: mix reg 0x%02x=0x%02x\n",
    358 	       0x6C, ess_read_mix_reg(sc, 0x6C));
    359 	printf("ESS_RECORD_VOL: x reg 0x%02x=0x%02x\n",
    360 	       0xB4, ess_read_x_reg(sc, 0xB4));
    361 	printf("Audio 1 play vol (unused): mix reg 0x%02x=0x%02x\n",
    362 	       0x14, ess_read_mix_reg(sc, 0x14));
    363 
    364 	printf("ESS_MIC_PREAMP: x reg 0x%02x=0x%02x\n",
    365 	       ESS_XCMD_PREAMP_CTRL, ess_read_x_reg(sc, ESS_XCMD_PREAMP_CTRL));
    366 	printf("ESS_RECORD_MONITOR: x reg 0x%02x=0x%02x\n",
    367 	       ESS_XCMD_AUDIO_CTRL, ess_read_x_reg(sc, ESS_XCMD_AUDIO_CTRL));
    368 	printf("Record source: mix reg 0x%02x=0x%02x, 0x%02x=0x%02x\n",
    369 	       ESS_MREG_ADC_SOURCE, ess_read_mix_reg(sc, ESS_MREG_ADC_SOURCE),
    370 	       ESS_MREG_AUDIO2_CTRL2, ess_read_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2));
    371 }
    372 
    373 #endif
    374 
    375 /*
    376  * Configure the ESS chip for the desired audio base address.
    377  */
    378 int
    379 ess_config_addr(struct ess_softc *sc)
    380 {
    381 	int iobase;
    382 	bus_space_tag_t iot;
    383 	/*
    384 	 * Configure using the System Control Register method.  This
    385 	 * method is used when the AMODE line is tied high, which is
    386 	 * the case for the Shark, but not for the evaluation board.
    387 	 */
    388 	bus_space_handle_t scr_access_ioh;
    389 	bus_space_handle_t scr_ioh;
    390 	u_short scr_value;
    391 
    392 	iobase = sc->sc_iobase;
    393 	iot = sc->sc_iot;
    394 	/*
    395 	 * Set the SCR bit to enable audio.
    396 	 */
    397 	scr_value = ESS_SCR_AUDIO_ENABLE;
    398 
    399 	/*
    400 	 * Set the SCR bits necessary to select the specified audio
    401 	 * base address.
    402 	 */
    403 	switch(iobase) {
    404 	case 0x220:
    405 		scr_value |= ESS_SCR_AUDIO_220;
    406 		break;
    407 	case 0x230:
    408 		scr_value |= ESS_SCR_AUDIO_230;
    409 		break;
    410 	case 0x240:
    411 		scr_value |= ESS_SCR_AUDIO_240;
    412 		break;
    413 	case 0x250:
    414 		scr_value |= ESS_SCR_AUDIO_250;
    415 		break;
    416 	default:
    417 		printf("ess: configured iobase 0x%x invalid\n", iobase);
    418 		return 1;
    419 		break;
    420 	}
    421 
    422 	/*
    423 	 * Get a mapping for the System Control Register (SCR) access
    424 	 * registers and the SCR data registers.
    425 	 */
    426 	if (bus_space_map(iot, ESS_SCR_ACCESS_BASE, ESS_SCR_ACCESS_PORTS,
    427 			  0, &scr_access_ioh)) {
    428 		printf("ess: can't map SCR access registers\n");
    429 		return 1;
    430 	}
    431 	if (bus_space_map(iot, ESS_SCR_BASE, ESS_SCR_PORTS,
    432 			  0, &scr_ioh)) {
    433 		printf("ess: can't map SCR registers\n");
    434 		bus_space_unmap(iot, scr_access_ioh, ESS_SCR_ACCESS_PORTS);
    435 		return 1;
    436 	}
    437 
    438 	/* Unlock the SCR. */
    439 	EWRITE1(iot, scr_access_ioh, ESS_SCR_UNLOCK, 0);
    440 
    441 	/* Write the base address information into SCR[0]. */
    442 	EWRITE1(iot, scr_ioh, ESS_SCR_INDEX, 0);
    443 	EWRITE1(iot, scr_ioh, ESS_SCR_DATA, scr_value);
    444 
    445 	/* Lock the SCR. */
    446 	EWRITE1(iot, scr_access_ioh, ESS_SCR_LOCK, 0);
    447 
    448 	/* Unmap the SCR access ports and the SCR data ports. */
    449 	bus_space_unmap(iot, scr_access_ioh, ESS_SCR_ACCESS_PORTS);
    450 	bus_space_unmap(iot, scr_ioh, ESS_SCR_PORTS);
    451 
    452 	return 0;
    453 }
    454 
    455 
    456 /*
    457  * Configure the ESS chip for the desired IRQ and DMA channels.
    458  * ESS  ISA
    459  * --------
    460  * IRQA irq9
    461  * IRQB irq5
    462  * IRQC irq7
    463  * IRQD irq10
    464  * IRQE irq15
    465  *
    466  * DRQA drq0
    467  * DRQB drq1
    468  * DRQC drq3
    469  * DRQD drq5
    470  */
    471 void
    472 ess_config_irq(struct ess_softc *sc)
    473 {
    474 	int v;
    475 
    476 	DPRINTFN(2,("ess_config_irq\n"));
    477 
    478 	if (sc->sc_model == ESS_1887 &&
    479 	    sc->sc_audio1.irq == sc->sc_audio2.irq &&
    480 	    sc->sc_audio1.irq != -1) {
    481 		/* Use new method, both interrupts are the same. */
    482 		v = ESS_IS_SELECT_IRQ;	/* enable intrs */
    483 		switch (sc->sc_audio1.irq) {
    484 		case 5:
    485 			v |= ESS_IS_INTRB;
    486 			break;
    487 		case 7:
    488 			v |= ESS_IS_INTRC;
    489 			break;
    490 		case 9:
    491 			v |= ESS_IS_INTRA;
    492 			break;
    493 		case 10:
    494 			v |= ESS_IS_INTRD;
    495 			break;
    496 		case 15:
    497 			v |= ESS_IS_INTRE;
    498 			break;
    499 #ifdef DIAGNOSTIC
    500 		default:
    501 			printf("ess_config_irq: configured irq %d not supported for Audio 1\n",
    502 			       sc->sc_audio1.irq);
    503 			return;
    504 #endif
    505 		}
    506 		/* Set the IRQ */
    507 		ess_write_mix_reg(sc, ESS_MREG_INTR_ST, v);
    508 		return;
    509 	}
    510 
    511 	if (sc->sc_model == ESS_1887) {
    512 		/* Tell the 1887 to use the old interrupt method. */
    513 		ess_write_mix_reg(sc, ESS_MREG_INTR_ST, ESS_IS_ES1888);
    514 	}
    515 
    516 	if (sc->sc_audio1.polled) {
    517 		/* Turn off Audio1 interrupts. */
    518 		v = 0;
    519 	} else {
    520 		/* Configure Audio 1 for the appropriate IRQ line. */
    521 		v = ESS_IRQ_CTRL_MASK | ESS_IRQ_CTRL_EXT; /* All intrs on */
    522 		switch (sc->sc_audio1.irq) {
    523 		case 5:
    524 			v |= ESS_IRQ_CTRL_INTRB;
    525 			break;
    526 		case 7:
    527 			v |= ESS_IRQ_CTRL_INTRC;
    528 			break;
    529 		case 9:
    530 			v |= ESS_IRQ_CTRL_INTRA;
    531 			break;
    532 		case 10:
    533 			v |= ESS_IRQ_CTRL_INTRD;
    534 			break;
    535 #ifdef DIAGNOSTIC
    536 		default:
    537 			printf("ess: configured irq %d not supported for Audio 1\n",
    538 			       sc->sc_audio1.irq);
    539 			return;
    540 #endif
    541 		}
    542 	}
    543 	ess_write_x_reg(sc, ESS_XCMD_IRQ_CTRL, v);
    544 
    545 	if (ESS_USE_AUDIO1(sc->sc_model))
    546 		return;
    547 
    548 	if (sc->sc_audio2.polled) {
    549 		/* Turn off Audio2 interrupts. */
    550 		ess_clear_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2,
    551 				    ESS_AUDIO2_CTRL2_IRQ2_ENABLE);
    552 	} else {
    553 		/* Audio2 is hardwired to INTRE in this mode. */
    554 		ess_set_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2,
    555 				  ESS_AUDIO2_CTRL2_IRQ2_ENABLE);
    556 	}
    557 }
    558 
    559 
    560 void
    561 ess_config_drq(struct ess_softc *sc)
    562 {
    563 	int v;
    564 
    565 	DPRINTFN(2,("ess_config_drq\n"));
    566 
    567 	/* Configure Audio 1 (record) for DMA on the appropriate channel. */
    568 	v = ESS_DRQ_CTRL_PU | ESS_DRQ_CTRL_EXT;
    569 	switch (sc->sc_audio1.drq) {
    570 	case 0:
    571 		v |= ESS_DRQ_CTRL_DRQA;
    572 		break;
    573 	case 1:
    574 		v |= ESS_DRQ_CTRL_DRQB;
    575 		break;
    576 	case 3:
    577 		v |= ESS_DRQ_CTRL_DRQC;
    578 		break;
    579 #ifdef DIAGNOSTIC
    580 	default:
    581 		printf("ess_config_drq: configured DMA chan %d not supported for Audio 1\n",
    582 		       sc->sc_audio1.drq);
    583 		return;
    584 #endif
    585 	}
    586 	/* Set DRQ1 */
    587 	ess_write_x_reg(sc, ESS_XCMD_DRQ_CTRL, v);
    588 
    589 	if (ESS_USE_AUDIO1(sc->sc_model))
    590 		return;
    591 
    592 	/* Configure DRQ2 */
    593 	v = ESS_AUDIO2_CTRL3_DRQ_PD;
    594 	switch (sc->sc_audio2.drq) {
    595 	case 0:
    596 		v |= ESS_AUDIO2_CTRL3_DRQA;
    597 		break;
    598 	case 1:
    599 		v |= ESS_AUDIO2_CTRL3_DRQB;
    600 		break;
    601 	case 3:
    602 		v |= ESS_AUDIO2_CTRL3_DRQC;
    603 		break;
    604 	case 5:
    605 		v |= ESS_AUDIO2_CTRL3_DRQD;
    606 		break;
    607 #ifdef DIAGNOSTIC
    608 	default:
    609 		printf("ess_config_drq: configured DMA chan %d not supported for Audio 2\n",
    610 		       sc->sc_audio2.drq);
    611 		return;
    612 #endif
    613 	}
    614 	ess_write_mix_reg(sc, ESS_MREG_AUDIO2_CTRL3, v);
    615 	/* Enable DMA 2 */
    616 	ess_set_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2,
    617 			  ESS_AUDIO2_CTRL2_DMA_ENABLE);
    618 }
    619 
    620 /*
    621  * Set up registers after a reset.
    622  */
    623 void
    624 ess_setup(struct ess_softc *sc)
    625 {
    626 
    627 	ess_config_irq(sc);
    628 	ess_config_drq(sc);
    629 
    630 	DPRINTFN(2,("ess_setup: done\n"));
    631 }
    632 
    633 /*
    634  * Determine the model of ESS chip we are talking to.  Currently we
    635  * only support ES1888, ES1887 and ES888.  The method of determining
    636  * the chip is based on the information on page 27 of the ES1887 data
    637  * sheet.
    638  *
    639  * This routine sets the values of sc->sc_model and sc->sc_version.
    640  */
    641 int
    642 ess_identify(struct ess_softc *sc)
    643 {
    644 	u_char reg1;
    645 	u_char reg2;
    646 	u_char reg3;
    647 	u_int8_t ident[4];
    648 
    649 	sc->sc_model = ESS_UNSUPPORTED;
    650 	sc->sc_version = 0;
    651 
    652 	memset(ident, 0, sizeof(ident));
    653 
    654 	/*
    655 	 * 1. Check legacy ID bytes.  These should be 0x68 0x8n, where
    656 	 *    n >= 8 for an ES1887 or an ES888.  Other values indicate
    657 	 *    earlier (unsupported) chips.
    658 	 */
    659 	ess_wdsp(sc, ESS_ACMD_LEGACY_ID);
    660 
    661 	if ((reg1 = ess_rdsp(sc)) != 0x68) {
    662 		printf("ess: First ID byte wrong (0x%02x)\n", reg1);
    663 		return 1;
    664 	}
    665 
    666 	reg2 = ess_rdsp(sc);
    667 	if (((reg2 & 0xf0) != 0x80) ||
    668 	    ((reg2 & 0x0f) < 8)) {
    669 		sc->sc_model = ESS_688;
    670 		return 0;
    671 	}
    672 
    673 	/*
    674 	 * Store the ID bytes as the version.
    675 	 */
    676 	sc->sc_version = (reg1 << 8) + reg2;
    677 
    678 
    679 	/*
    680 	 * 2. Verify we can change bit 2 in mixer register 0x64.  This
    681 	 *    should be possible on all supported chips.
    682 	 */
    683 	reg1 = ess_read_mix_reg(sc, ESS_MREG_VOLUME_CTRL);
    684 	reg2 = reg1 ^ 0x04;  /* toggle bit 2 */
    685 
    686 	ess_write_mix_reg(sc, ESS_MREG_VOLUME_CTRL, reg2);
    687 
    688 	if (ess_read_mix_reg(sc, ESS_MREG_VOLUME_CTRL) != reg2) {
    689 		switch (sc->sc_version) {
    690 		case 0x688b:
    691 			sc->sc_model = ESS_1688;
    692 			break;
    693 		default:
    694 			printf("ess: Hardware error (unable to toggle bit 2 of mixer register 0x64)\n");
    695 			return 1;
    696 		}
    697 		return 0;
    698 	}
    699 
    700 	/*
    701 	 * Restore the original value of mixer register 0x64.
    702 	 */
    703 	ess_write_mix_reg(sc, ESS_MREG_VOLUME_CTRL, reg1);
    704 
    705 
    706 	/*
    707 	 * 3. Verify we can change the value of mixer register
    708 	 *    ESS_MREG_SAMPLE_RATE.
    709 	 *    This is possible on the 1888/1887/888, but not on the 1788.
    710 	 *    It is not necessary to restore the value of this mixer register.
    711 	 */
    712 	reg1 = ess_read_mix_reg(sc, ESS_MREG_SAMPLE_RATE);
    713 	reg2 = reg1 ^ 0xff;  /* toggle all bits */
    714 
    715 	ess_write_mix_reg(sc, ESS_MREG_SAMPLE_RATE, reg2);
    716 
    717 	if (ess_read_mix_reg(sc, ESS_MREG_SAMPLE_RATE) != reg2) {
    718 		/* If we got this far before failing, it's a 1788. */
    719 		sc->sc_model = ESS_1788;
    720 
    721 		/*
    722 		 * Identify ESS model for ES18[67]8.
    723 		 */
    724 		ess_read_multi_mix_reg(sc, 0x40, ident, sizeof(ident));
    725 		if(ident[0] == 0x18) {
    726 			switch(ident[1]) {
    727 			case 0x68:
    728 				sc->sc_model = ESS_1868;
    729 				break;
    730 			case 0x78:
    731 				sc->sc_model = ESS_1878;
    732 				break;
    733 			}
    734 		}
    735 
    736 		return 0;
    737 	}
    738 
    739 	/*
    740 	 * 4. Determine if we can change bit 5 in mixer register 0x64.
    741 	 *    This determines whether we have an ES1887:
    742 	 *
    743 	 *    - can change indicates ES1887
    744 	 *    - can't change indicates ES1888 or ES888
    745 	 */
    746 	reg1 = ess_read_mix_reg(sc, ESS_MREG_VOLUME_CTRL);
    747 	reg2 = reg1 ^ 0x20;  /* toggle bit 5 */
    748 
    749 	ess_write_mix_reg(sc, ESS_MREG_VOLUME_CTRL, reg2);
    750 
    751 	if (ess_read_mix_reg(sc, ESS_MREG_VOLUME_CTRL) == reg2) {
    752 		sc->sc_model = ESS_1887;
    753 
    754 		/*
    755 		 * Restore the original value of mixer register 0x64.
    756 		 */
    757 		ess_write_mix_reg(sc, ESS_MREG_VOLUME_CTRL, reg1);
    758 
    759 		/*
    760 		 * Identify ESS model for ES18[67]9.
    761 		 */
    762 		ess_read_multi_mix_reg(sc, 0x40, ident, sizeof(ident));
    763 		if(ident[0] == 0x18) {
    764 			switch(ident[1]) {
    765 			case 0x69:
    766 				sc->sc_model = ESS_1869;
    767 				break;
    768 			case 0x79:
    769 				sc->sc_model = ESS_1879;
    770 				break;
    771 			}
    772 		}
    773 
    774 		return 0;
    775 	}
    776 
    777 	/*
    778 	 * 5. Determine if we can change the value of mixer
    779 	 *    register 0x69 independently of mixer register
    780 	 *    0x68. This determines which chip we have:
    781 	 *
    782 	 *    - can modify idependently indicates ES888
    783 	 *    - register 0x69 is an alias of 0x68 indicates ES1888
    784 	 */
    785 	reg1 = ess_read_mix_reg(sc, 0x68);
    786 	reg2 = ess_read_mix_reg(sc, 0x69);
    787 	reg3 = reg2 ^ 0xff;  /* toggle all bits */
    788 
    789 	/*
    790 	 * Write different values to each register.
    791 	 */
    792 	ess_write_mix_reg(sc, 0x68, reg2);
    793 	ess_write_mix_reg(sc, 0x69, reg3);
    794 
    795 	if (ess_read_mix_reg(sc, 0x68) == reg2 &&
    796 	    ess_read_mix_reg(sc, 0x69) == reg3)
    797 		sc->sc_model = ESS_888;
    798 	else
    799 		sc->sc_model = ESS_1888;
    800 
    801 	/*
    802 	 * Restore the original value of the registers.
    803 	 */
    804 	ess_write_mix_reg(sc, 0x68, reg1);
    805 	ess_write_mix_reg(sc, 0x69, reg2);
    806 
    807 	return 0;
    808 }
    809 
    810 
    811 int
    812 ess_setup_sc(struct ess_softc *sc, int doinit)
    813 {
    814 
    815 	/* Reset the chip. */
    816 	if (ess_reset(sc) != 0) {
    817 		DPRINTF(("ess_setup_sc: couldn't reset chip\n"));
    818 		return 1;
    819 	}
    820 
    821 	/* Identify the ESS chip, and check that it is supported. */
    822 	if (ess_identify(sc)) {
    823 		DPRINTF(("ess_setup_sc: couldn't identify\n"));
    824 		return 1;
    825 	}
    826 
    827 	return 0;
    828 }
    829 
    830 /*
    831  * Probe for the ESS hardware.
    832  */
    833 int
    834 essmatch(struct ess_softc *sc)
    835 {
    836 	if (!ESS_BASE_VALID(sc->sc_iobase)) {
    837 		printf("ess: configured iobase 0x%x invalid\n", sc->sc_iobase);
    838 		return 0;
    839 	}
    840 
    841 	if (ess_setup_sc(sc, 1))
    842 		return 0;
    843 
    844 	if (sc->sc_model == ESS_UNSUPPORTED) {
    845 		DPRINTF(("ess: Unsupported model\n"));
    846 		return 0;
    847 	}
    848 
    849 	/* Check that requested DMA channels are valid and different. */
    850 	if (!ESS_DRQ1_VALID(sc->sc_audio1.drq)) {
    851 		printf("ess: record drq %d invalid\n", sc->sc_audio1.drq);
    852 		return 0;
    853 	}
    854 	if (!isa_drq_isfree(sc->sc_ic, sc->sc_audio1.drq))
    855 		return 0;
    856 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
    857 		if (!ESS_DRQ2_VALID(sc->sc_audio2.drq)) {
    858 			printf("ess: play drq %d invalid\n", sc->sc_audio2.drq);
    859 			return 0;
    860 		}
    861 		if (sc->sc_audio1.drq == sc->sc_audio2.drq) {
    862 			printf("ess: play and record drq both %d\n",
    863 			       sc->sc_audio1.drq);
    864 			return 0;
    865 		}
    866 		if (!isa_drq_isfree(sc->sc_ic, sc->sc_audio2.drq))
    867 			return 0;
    868 	}
    869 
    870 	/*
    871 	 * The 1887 has an additional IRQ mode where both channels are mapped
    872 	 * to the same IRQ.
    873 	 */
    874 	if (sc->sc_model == ESS_1887 &&
    875 	    sc->sc_audio1.irq == sc->sc_audio2.irq &&
    876 	    sc->sc_audio1.irq != -1 &&
    877 	    ESS_IRQ12_VALID(sc->sc_audio1.irq))
    878 		goto irq_not1888;
    879 
    880 	/* Check that requested IRQ lines are valid and different. */
    881 	if (sc->sc_audio1.irq != -1 &&
    882 	    !ESS_IRQ1_VALID(sc->sc_audio1.irq)) {
    883 		printf("ess: record irq %d invalid\n", sc->sc_audio1.irq);
    884 		return 0;
    885 	}
    886 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
    887 		if (sc->sc_audio2.irq != -1 &&
    888 		    !ESS_IRQ2_VALID(sc->sc_audio2.irq)) {
    889 			printf("ess: play irq %d invalid\n", sc->sc_audio2.irq);
    890 			return 0;
    891 		}
    892 		if (sc->sc_audio1.irq == sc->sc_audio2.irq &&
    893 		    sc->sc_audio1.irq != -1) {
    894 			printf("ess: play and record irq both %d\n",
    895 			       sc->sc_audio1.irq);
    896 			return 0;
    897 		}
    898 	}
    899 
    900 irq_not1888:
    901 	/* XXX should we check IRQs as well? */
    902 
    903 	return 2; /* beat "sb" */
    904 }
    905 
    906 
    907 /*
    908  * Attach hardware to driver, attach hardware driver to audio
    909  * pseudo-device driver.
    910  */
    911 void
    912 essattach(struct ess_softc *sc, int enablejoy)
    913 {
    914 	struct audio_attach_args arg;
    915 	int i;
    916 	u_int v;
    917 
    918 	if (ess_setup_sc(sc, 0)) {
    919 		printf(": setup failed\n");
    920 		return;
    921 	}
    922 
    923 	aprint_normal("ESS Technology ES%s [version 0x%04x]\n",
    924 	    essmodel[sc->sc_model], sc->sc_version);
    925 
    926 	callout_init(&sc->sc_poll1_ch, CALLOUT_MPSAFE);
    927 	callout_init(&sc->sc_poll2_ch, CALLOUT_MPSAFE);
    928 	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
    929 	mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_AUDIO);
    930 
    931 	sc->sc_audio1.polled = sc->sc_audio1.irq == -1;
    932 	if (!sc->sc_audio1.polled) {
    933 		sc->sc_audio1.ih = isa_intr_establish(sc->sc_ic,
    934 		    sc->sc_audio1.irq, sc->sc_audio1.ist, IPL_AUDIO,
    935 		    ess_audio1_intr, sc);
    936 		aprint_normal_dev(sc->sc_dev,
    937 		    "audio1 interrupting at irq %d\n", sc->sc_audio1.irq);
    938 	} else
    939 		aprint_normal_dev(sc->sc_dev, "audio1 polled\n");
    940 	sc->sc_audio1.maxsize = isa_dmamaxsize(sc->sc_ic, sc->sc_audio1.drq);
    941 
    942 	if (isa_drq_alloc(sc->sc_ic, sc->sc_audio1.drq) != 0) {
    943 		aprint_error_dev(sc->sc_dev, "can't reserve drq %d\n",
    944 		    sc->sc_audio1.drq);
    945 		goto fail;
    946 	}
    947 
    948 	if (isa_dmamap_create(sc->sc_ic, sc->sc_audio1.drq,
    949 	    sc->sc_audio1.maxsize, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
    950 		aprint_error_dev(sc->sc_dev, "can't create map for drq %d\n",
    951 		    sc->sc_audio1.drq);
    952 		goto fail;
    953 	}
    954 
    955 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
    956 		sc->sc_audio2.polled = sc->sc_audio2.irq == -1;
    957 		if (!sc->sc_audio2.polled) {
    958 			sc->sc_audio2.ih = isa_intr_establish(sc->sc_ic,
    959 			    sc->sc_audio2.irq, sc->sc_audio2.ist, IPL_AUDIO,
    960 			    ess_audio2_intr, sc);
    961 			aprint_normal_dev(sc->sc_dev,
    962 			    "audio2 interrupting at irq %d\n",
    963 			    sc->sc_audio2.irq);
    964 		} else
    965 			aprint_normal_dev(sc->sc_dev, "audio2 polled\n");
    966 		sc->sc_audio2.maxsize = isa_dmamaxsize(sc->sc_ic,
    967 		    sc->sc_audio2.drq);
    968 
    969 		if (isa_drq_alloc(sc->sc_ic, sc->sc_audio2.drq) != 0) {
    970 			aprint_error_dev(sc->sc_dev, "can't reserve drq %d\n",
    971 			    sc->sc_audio2.drq);
    972 			goto fail;
    973 		}
    974 
    975 		if (isa_dmamap_create(sc->sc_ic, sc->sc_audio2.drq,
    976 		    sc->sc_audio2.maxsize, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
    977 			aprint_error_dev(sc->sc_dev, "can't create map for drq %d\n",
    978 			    sc->sc_audio2.drq);
    979 			goto fail;
    980 		}
    981 	}
    982 
    983 	/* Do a hardware reset on the mixer. */
    984 	ess_write_mix_reg(sc, ESS_MIX_RESET, ESS_MIX_RESET);
    985 
    986 	/*
    987 	 * Set volume of Audio 1 to zero and disable Audio 1 DAC input
    988 	 * to playback mixer, since playback is always through Audio 2.
    989 	 */
    990 	if (!ESS_USE_AUDIO1(sc->sc_model))
    991 		ess_write_mix_reg(sc, ESS_MREG_VOLUME_VOICE, 0);
    992 	ess_wdsp(sc, ESS_ACMD_DISABLE_SPKR);
    993 
    994 	if (ESS_USE_AUDIO1(sc->sc_model)) {
    995 		ess_write_mix_reg(sc, ESS_MREG_ADC_SOURCE, ESS_SOURCE_MIC);
    996 		sc->in_port = ESS_SOURCE_MIC;
    997 		if (ESS_IS_ES18X9(sc->sc_model)) {
    998 			sc->ndevs = ESS_18X9_NDEVS;
    999 			sc->sc_spatializer = 0;
   1000 			ess_set_mreg_bits(sc, ESS_MREG_MODE,
   1001 			    ESS_MODE_ASYNC_MODE | ESS_MODE_NEWREG);
   1002 			ess_set_mreg_bits(sc, ESS_MREG_SPATIAL_CTRL,
   1003 			    ESS_SPATIAL_CTRL_RESET);
   1004 			ess_clear_mreg_bits(sc, ESS_MREG_SPATIAL_CTRL,
   1005 			    ESS_SPATIAL_CTRL_ENABLE | ESS_SPATIAL_CTRL_MONO);
   1006 		} else
   1007 			sc->ndevs = ESS_1788_NDEVS;
   1008 	} else {
   1009 		/*
   1010 		 * Set hardware record source to use output of the record
   1011 		 * mixer. We do the selection of record source in software by
   1012 		 * setting the gain of the unused sources to zero. (See
   1013 		 * ess_set_in_ports.)
   1014 		 */
   1015 		ess_write_mix_reg(sc, ESS_MREG_ADC_SOURCE, ESS_SOURCE_MIXER);
   1016 		sc->in_mask = 1 << ESS_MIC_REC_VOL;
   1017 		sc->ndevs = ESS_1888_NDEVS;
   1018 		ess_clear_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2, 0x10);
   1019 		ess_set_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2, 0x08);
   1020 	}
   1021 
   1022 	/*
   1023 	 * Set gain on each mixer device to a sensible value.
   1024 	 * Devices not normally used are turned off, and other devices
   1025 	 * are set to 50% volume.
   1026 	 */
   1027 	for (i = 0; i < sc->ndevs; i++) {
   1028 		if (ESS_IS_ES18X9(sc->sc_model)) {
   1029 			switch (i) {
   1030 			case ESS_SPATIALIZER:
   1031 			case ESS_SPATIALIZER_ENABLE:
   1032 				v = 0;
   1033 				goto skip;
   1034 			}
   1035 		}
   1036 		switch (i) {
   1037 		case ESS_MIC_PLAY_VOL:
   1038 		case ESS_LINE_PLAY_VOL:
   1039 		case ESS_CD_PLAY_VOL:
   1040 		case ESS_AUXB_PLAY_VOL:
   1041 		case ESS_DAC_REC_VOL:
   1042 		case ESS_LINE_REC_VOL:
   1043 		case ESS_SYNTH_REC_VOL:
   1044 		case ESS_CD_REC_VOL:
   1045 		case ESS_AUXB_REC_VOL:
   1046 			v = 0;
   1047 			break;
   1048 		default:
   1049 			v = ESS_4BIT_GAIN(AUDIO_MAX_GAIN / 2);
   1050 			break;
   1051 		}
   1052 skip:
   1053 		sc->gain[i][ESS_LEFT] = sc->gain[i][ESS_RIGHT] = v;
   1054 		ess_set_gain(sc, i, 1);
   1055 	}
   1056 
   1057 	ess_setup(sc);
   1058 
   1059 	/* Disable the speaker until the device is opened.  */
   1060 	ess_speaker_off(sc);
   1061 	sc->spkr_state = SPKR_OFF;
   1062 
   1063 	snprintf(ess_device.name, sizeof(ess_device.name), "ES%s",
   1064 	    essmodel[sc->sc_model]);
   1065 	snprintf(ess_device.version, sizeof(ess_device.version), "0x%04x",
   1066 	    sc->sc_version);
   1067 
   1068 	if (ESS_USE_AUDIO1(sc->sc_model))
   1069 		audio_attach_mi(&ess_1788_hw_if, sc, sc->sc_dev);
   1070 	else
   1071 		audio_attach_mi(&ess_1888_hw_if, sc, sc->sc_dev);
   1072 
   1073 	arg.type = AUDIODEV_TYPE_OPL;
   1074 	arg.hwif = 0;
   1075 	arg.hdl = 0;
   1076 	(void)config_found(sc->sc_dev, &arg, audioprint);
   1077 
   1078 #if NJOY_ESS > 0
   1079 	if (sc->sc_model == ESS_1888 && enablejoy) {
   1080 		unsigned char m40;
   1081 
   1082 		m40 = ess_read_mix_reg(sc, 0x40);
   1083 		m40 |= 2;
   1084 		ess_write_mix_reg(sc, 0x40, m40);
   1085 
   1086 		arg.type = AUDIODEV_TYPE_AUX;
   1087 		(void)config_found(sc->sc_dev, &arg, audioprint);
   1088 	}
   1089 #endif
   1090 
   1091 #ifdef AUDIO_DEBUG
   1092 	if (essdebug > 0)
   1093 		ess_printsc(sc);
   1094 #endif
   1095 
   1096 	return;
   1097 
   1098  fail:
   1099 	callout_destroy(&sc->sc_poll1_ch);
   1100 	callout_destroy(&sc->sc_poll2_ch);
   1101 	mutex_destroy(&sc->sc_lock);
   1102 	mutex_destroy(&sc->sc_intr_lock);
   1103 }
   1104 
   1105 /*
   1106  * Various routines to interface to higher level audio driver
   1107  */
   1108 
   1109 int
   1110 ess_open(void *addr, int flags)
   1111 {
   1112 
   1113 	return 0;
   1114 }
   1115 
   1116 void
   1117 ess_close(void *addr)
   1118 {
   1119 	struct ess_softc *sc;
   1120 
   1121 	sc = addr;
   1122 	DPRINTF(("ess_close: sc=%p\n", sc));
   1123 
   1124 	ess_speaker_off(sc);
   1125 	sc->spkr_state = SPKR_OFF;
   1126 
   1127 	DPRINTF(("ess_close: closed\n"));
   1128 }
   1129 
   1130 /*
   1131  * Wait for FIFO to drain, and analog section to settle.
   1132  * XXX should check FIFO empty bit.
   1133  */
   1134 int
   1135 ess_drain(void *addr)
   1136 {
   1137 	struct ess_softc *sc;
   1138 
   1139 	sc = addr;
   1140 	mutex_exit(&sc->sc_lock);
   1141 	kpause("essdr", FALSE, hz/20, &sc->sc_intr_lock); /* XXX */
   1142 	if (!mutex_tryenter(&sc->sc_lock)) {
   1143 		mutex_spin_exit(&sc->sc_intr_lock);
   1144 		mutex_enter(&sc->sc_lock);
   1145 		mutex_spin_enter(&sc->sc_intr_lock);
   1146 	}
   1147 
   1148 	return 0;
   1149 }
   1150 
   1151 /* XXX should use reference count */
   1152 int
   1153 ess_speaker_ctl(void *addr, int newstate)
   1154 {
   1155 	struct ess_softc *sc;
   1156 
   1157 	sc = addr;
   1158 	if ((newstate == SPKR_ON) && (sc->spkr_state == SPKR_OFF)) {
   1159 		ess_speaker_on(sc);
   1160 		sc->spkr_state = SPKR_ON;
   1161 	}
   1162 	if ((newstate == SPKR_OFF) && (sc->spkr_state == SPKR_ON)) {
   1163 		ess_speaker_off(sc);
   1164 		sc->spkr_state = SPKR_OFF;
   1165 	}
   1166 	return 0;
   1167 }
   1168 
   1169 int
   1170 ess_getdev(void *addr, struct audio_device *retp)
   1171 {
   1172 
   1173 	*retp = ess_device;
   1174 	return 0;
   1175 }
   1176 
   1177 int
   1178 ess_query_encoding(void *addr, struct audio_encoding *fp)
   1179 {
   1180 	/*struct ess_softc *sc = addr;*/
   1181 
   1182 	switch (fp->index) {
   1183 	case 0:
   1184 		strcpy(fp->name, AudioEulinear);
   1185 		fp->encoding = AUDIO_ENCODING_ULINEAR;
   1186 		fp->precision = 8;
   1187 		fp->flags = 0;
   1188 		return 0;
   1189 	case 1:
   1190 		strcpy(fp->name, AudioEmulaw);
   1191 		fp->encoding = AUDIO_ENCODING_ULAW;
   1192 		fp->precision = 8;
   1193 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
   1194 		return 0;
   1195 	case 2:
   1196 		strcpy(fp->name, AudioEalaw);
   1197 		fp->encoding = AUDIO_ENCODING_ALAW;
   1198 		fp->precision = 8;
   1199 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
   1200 		return 0;
   1201 	case 3:
   1202 		strcpy(fp->name, AudioEslinear);
   1203 		fp->encoding = AUDIO_ENCODING_SLINEAR;
   1204 		fp->precision = 8;
   1205 		fp->flags = 0;
   1206 		return 0;
   1207 	case 4:
   1208 		strcpy(fp->name, AudioEslinear_le);
   1209 		fp->encoding = AUDIO_ENCODING_SLINEAR_LE;
   1210 		fp->precision = 16;
   1211 		fp->flags = 0;
   1212 		return 0;
   1213 	case 5:
   1214 		strcpy(fp->name, AudioEulinear_le);
   1215 		fp->encoding = AUDIO_ENCODING_ULINEAR_LE;
   1216 		fp->precision = 16;
   1217 		fp->flags = 0;
   1218 		return 0;
   1219 	case 6:
   1220 		strcpy(fp->name, AudioEslinear_be);
   1221 		fp->encoding = AUDIO_ENCODING_SLINEAR_BE;
   1222 		fp->precision = 16;
   1223 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
   1224 		return 0;
   1225 	case 7:
   1226 		strcpy(fp->name, AudioEulinear_be);
   1227 		fp->encoding = AUDIO_ENCODING_ULINEAR_BE;
   1228 		fp->precision = 16;
   1229 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
   1230 		return 0;
   1231 	default:
   1232 		return EINVAL;
   1233 	}
   1234 	return 0;
   1235 }
   1236 
   1237 int
   1238 ess_set_params(
   1239 	void *addr,
   1240 	int setmode, int usemode,
   1241 	audio_params_t *play, audio_params_t *rec,
   1242 	stream_filter_list_t *pfil, stream_filter_list_t *rfil)
   1243 {
   1244 	struct ess_softc *sc;
   1245 	int rate;
   1246 
   1247 	DPRINTF(("ess_set_params: set=%d use=%d\n", setmode, usemode));
   1248 	sc = addr;
   1249 	/*
   1250 	 * The ES1887 manual (page 39, `Full-Duplex DMA Mode') claims that in
   1251 	 * full-duplex operation the sample rates must be the same for both
   1252 	 * channels.  This appears to be false; the only bit in common is the
   1253 	 * clock source selection.  However, we'll be conservative here.
   1254 	 * - mycroft
   1255 	 */
   1256 	if (play->sample_rate != rec->sample_rate &&
   1257 	    usemode == (AUMODE_PLAY | AUMODE_RECORD)) {
   1258 		if (setmode == AUMODE_PLAY) {
   1259 			rec->sample_rate = play->sample_rate;
   1260 			setmode |= AUMODE_RECORD;
   1261 		} else if (setmode == AUMODE_RECORD) {
   1262 			play->sample_rate = rec->sample_rate;
   1263 			setmode |= AUMODE_PLAY;
   1264 		} else
   1265 			return EINVAL;
   1266 	}
   1267 
   1268 	if (setmode & AUMODE_RECORD) {
   1269 		if (auconv_set_converter(ess_formats, ESS_NFORMATS,
   1270 					 AUMODE_RECORD, rec, FALSE, rfil) < 0)
   1271 			return EINVAL;
   1272 	}
   1273 	if (setmode & AUMODE_PLAY) {
   1274 		if (auconv_set_converter(ess_formats, ESS_NFORMATS,
   1275 					 AUMODE_PLAY, play, FALSE, pfil) < 0)
   1276 			return EINVAL;
   1277 	}
   1278 
   1279 	if (usemode == AUMODE_RECORD)
   1280 		rate = rec->sample_rate;
   1281 	else
   1282 		rate = play->sample_rate;
   1283 
   1284 	ess_write_x_reg(sc, ESS_XCMD_SAMPLE_RATE, ess_srtotc(sc, rate));
   1285 	ess_write_x_reg(sc, ESS_XCMD_FILTER_CLOCK, ess_srtofc(rate));
   1286 
   1287 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
   1288 		ess_write_mix_reg(sc, ESS_MREG_SAMPLE_RATE,
   1289 		    ess_srtotc(sc, rate));
   1290 		ess_write_mix_reg(sc, ESS_MREG_FILTER_CLOCK, ess_srtofc(rate));
   1291 	}
   1292 
   1293 	return 0;
   1294 }
   1295 
   1296 int
   1297 ess_audio1_trigger_output(
   1298 	void *addr,
   1299 	void *start, void *end,
   1300 	int blksize,
   1301 	void (*intr)(void *),
   1302 	void *arg,
   1303 	const audio_params_t *param)
   1304 {
   1305 	struct ess_softc *sc;
   1306 	u_int8_t reg;
   1307 
   1308 	sc = addr;
   1309 	DPRINTFN(1, ("ess_audio1_trigger_output: sc=%p start=%p end=%p "
   1310 	    "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg));
   1311 
   1312 	if (sc->sc_audio1.active)
   1313 		panic("ess_audio1_trigger_output: already running");
   1314 
   1315 	sc->sc_audio1.active = 1;
   1316 	sc->sc_audio1.intr = intr;
   1317 	sc->sc_audio1.arg = arg;
   1318 	if (sc->sc_audio1.polled) {
   1319 		sc->sc_audio1.dmapos = 0;
   1320 		sc->sc_audio1.buffersize = (char *)end - (char *)start;
   1321 		sc->sc_audio1.dmacount = 0;
   1322 		sc->sc_audio1.blksize = blksize;
   1323 		callout_reset(&sc->sc_poll1_ch, hz / 30,
   1324 		    ess_audio1_poll, sc);
   1325 	}
   1326 
   1327 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO_CTRL);
   1328 	if (param->channels == 2) {
   1329 		reg &= ~ESS_AUDIO_CTRL_MONO;
   1330 		reg |= ESS_AUDIO_CTRL_STEREO;
   1331 	} else {
   1332 		reg |= ESS_AUDIO_CTRL_MONO;
   1333 		reg &= ~ESS_AUDIO_CTRL_STEREO;
   1334 	}
   1335 	ess_write_x_reg(sc, ESS_XCMD_AUDIO_CTRL, reg);
   1336 
   1337 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO1_CTRL1);
   1338 	if (param->precision == 16)
   1339 		reg |= ESS_AUDIO1_CTRL1_FIFO_SIZE;
   1340 	else
   1341 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_SIZE;
   1342 	if (param->channels == 2)
   1343 		reg |= ESS_AUDIO1_CTRL1_FIFO_STEREO;
   1344 	else
   1345 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_STEREO;
   1346 	if (param->encoding == AUDIO_ENCODING_SLINEAR_BE ||
   1347 	    param->encoding == AUDIO_ENCODING_SLINEAR_LE)
   1348 		reg |= ESS_AUDIO1_CTRL1_FIFO_SIGNED;
   1349 	else
   1350 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_SIGNED;
   1351 	reg |= ESS_AUDIO1_CTRL1_FIFO_CONNECT;
   1352 	ess_write_x_reg(sc, ESS_XCMD_AUDIO1_CTRL1, reg);
   1353 
   1354 	isa_dmastart(sc->sc_ic, sc->sc_audio1.drq, start,
   1355 		     (char *)end - (char *)start, NULL,
   1356 	    DMAMODE_WRITE | DMAMODE_LOOPDEMAND, BUS_DMA_NOWAIT);
   1357 
   1358 	/* Program transfer count registers with 2's complement of count. */
   1359 	blksize = -blksize;
   1360 	ess_write_x_reg(sc, ESS_XCMD_XFER_COUNTLO, blksize);
   1361 	ess_write_x_reg(sc, ESS_XCMD_XFER_COUNTHI, blksize >> 8);
   1362 
   1363 	/* Use 4 bytes per output DMA. */
   1364 	ess_set_xreg_bits(sc, ESS_XCMD_DEMAND_CTRL, ESS_DEMAND_CTRL_DEMAND_4);
   1365 
   1366 	/* Start auto-init DMA */
   1367 	ess_wdsp(sc, ESS_ACMD_ENABLE_SPKR);
   1368 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO1_CTRL2);
   1369 	reg &= ~(ESS_AUDIO1_CTRL2_DMA_READ | ESS_AUDIO1_CTRL2_ADC_ENABLE);
   1370 	reg |= ESS_AUDIO1_CTRL2_FIFO_ENABLE | ESS_AUDIO1_CTRL2_AUTO_INIT;
   1371 	ess_write_x_reg(sc, ESS_XCMD_AUDIO1_CTRL2, reg);
   1372 
   1373 	return 0;
   1374 }
   1375 
   1376 int
   1377 ess_audio2_trigger_output(
   1378 	void *addr,
   1379 	void *start, void *end,
   1380 	int blksize,
   1381 	void (*intr)(void *),
   1382 	void *arg,
   1383 	const audio_params_t *param)
   1384 {
   1385 	struct ess_softc *sc;
   1386 	u_int8_t reg;
   1387 
   1388 	sc = addr;
   1389 	DPRINTFN(1, ("ess_audio2_trigger_output: sc=%p start=%p end=%p "
   1390 	    "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg));
   1391 
   1392 	if (sc->sc_audio2.active)
   1393 		panic("ess_audio2_trigger_output: already running");
   1394 
   1395 	sc->sc_audio2.active = 1;
   1396 	sc->sc_audio2.intr = intr;
   1397 	sc->sc_audio2.arg = arg;
   1398 	if (sc->sc_audio2.polled) {
   1399 		sc->sc_audio2.dmapos = 0;
   1400 		sc->sc_audio2.buffersize = (char *)end - (char *)start;
   1401 		sc->sc_audio2.dmacount = 0;
   1402 		sc->sc_audio2.blksize = blksize;
   1403 		callout_reset(&sc->sc_poll2_ch, hz / 30,
   1404 		    ess_audio2_poll, sc);
   1405 	}
   1406 
   1407 	reg = ess_read_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2);
   1408 	if (param->precision == 16)
   1409 		reg |= ESS_AUDIO2_CTRL2_FIFO_SIZE;
   1410 	else
   1411 		reg &= ~ESS_AUDIO2_CTRL2_FIFO_SIZE;
   1412 	if (param->channels == 2)
   1413 		reg |= ESS_AUDIO2_CTRL2_CHANNELS;
   1414 	else
   1415 		reg &= ~ESS_AUDIO2_CTRL2_CHANNELS;
   1416 	if (param->encoding == AUDIO_ENCODING_SLINEAR_BE ||
   1417 	    param->encoding == AUDIO_ENCODING_SLINEAR_LE)
   1418 		reg |= ESS_AUDIO2_CTRL2_FIFO_SIGNED;
   1419 	else
   1420 		reg &= ~ESS_AUDIO2_CTRL2_FIFO_SIGNED;
   1421 	ess_write_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2, reg);
   1422 
   1423 	isa_dmastart(sc->sc_ic, sc->sc_audio2.drq, start,
   1424 		     (char *)end - (char *)start, NULL,
   1425 	    DMAMODE_WRITE | DMAMODE_LOOPDEMAND, BUS_DMA_NOWAIT);
   1426 
   1427 	if (IS16BITDRQ(sc->sc_audio2.drq))
   1428 		blksize >>= 1;	/* use word count for 16 bit DMA */
   1429 	/* Program transfer count registers with 2's complement of count. */
   1430 	blksize = -blksize;
   1431 	ess_write_mix_reg(sc, ESS_MREG_XFER_COUNTLO, blksize);
   1432 	ess_write_mix_reg(sc, ESS_MREG_XFER_COUNTHI, blksize >> 8);
   1433 
   1434 	reg = ess_read_mix_reg(sc, ESS_MREG_AUDIO2_CTRL1);
   1435 	if (IS16BITDRQ(sc->sc_audio2.drq))
   1436 		reg |= ESS_AUDIO2_CTRL1_XFER_SIZE;
   1437 	else
   1438 		reg &= ~ESS_AUDIO2_CTRL1_XFER_SIZE;
   1439 	reg |= ESS_AUDIO2_CTRL1_DEMAND_8;
   1440 	reg |= ESS_AUDIO2_CTRL1_DAC_ENABLE | ESS_AUDIO2_CTRL1_FIFO_ENABLE |
   1441 	       ESS_AUDIO2_CTRL1_AUTO_INIT;
   1442 	ess_write_mix_reg(sc, ESS_MREG_AUDIO2_CTRL1, reg);
   1443 
   1444 	return (0);
   1445 }
   1446 
   1447 int
   1448 ess_audio1_trigger_input(
   1449 	void *addr,
   1450 	void *start, void *end,
   1451 	int blksize,
   1452 	void (*intr)(void *),
   1453 	void *arg,
   1454 	const audio_params_t *param)
   1455 {
   1456 	struct ess_softc *sc;
   1457 	u_int8_t reg;
   1458 
   1459 	sc = addr;
   1460 	DPRINTFN(1, ("ess_audio1_trigger_input: sc=%p start=%p end=%p "
   1461 	    "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg));
   1462 
   1463 	if (sc->sc_audio1.active)
   1464 		panic("ess_audio1_trigger_input: already running");
   1465 
   1466 	sc->sc_audio1.active = 1;
   1467 	sc->sc_audio1.intr = intr;
   1468 	sc->sc_audio1.arg = arg;
   1469 	if (sc->sc_audio1.polled) {
   1470 		sc->sc_audio1.dmapos = 0;
   1471 		sc->sc_audio1.buffersize = (char *)end - (char *)start;
   1472 		sc->sc_audio1.dmacount = 0;
   1473 		sc->sc_audio1.blksize = blksize;
   1474 		callout_reset(&sc->sc_poll1_ch, hz / 30,
   1475 		    ess_audio1_poll, sc);
   1476 	}
   1477 
   1478 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO_CTRL);
   1479 	if (param->channels == 2) {
   1480 		reg &= ~ESS_AUDIO_CTRL_MONO;
   1481 		reg |= ESS_AUDIO_CTRL_STEREO;
   1482 	} else {
   1483 		reg |= ESS_AUDIO_CTRL_MONO;
   1484 		reg &= ~ESS_AUDIO_CTRL_STEREO;
   1485 	}
   1486 	ess_write_x_reg(sc, ESS_XCMD_AUDIO_CTRL, reg);
   1487 
   1488 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO1_CTRL1);
   1489 	if (param->precision == 16)
   1490 		reg |= ESS_AUDIO1_CTRL1_FIFO_SIZE;
   1491 	else
   1492 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_SIZE;
   1493 	if (param->channels == 2)
   1494 		reg |= ESS_AUDIO1_CTRL1_FIFO_STEREO;
   1495 	else
   1496 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_STEREO;
   1497 	if (param->encoding == AUDIO_ENCODING_SLINEAR_BE ||
   1498 	    param->encoding == AUDIO_ENCODING_SLINEAR_LE)
   1499 		reg |= ESS_AUDIO1_CTRL1_FIFO_SIGNED;
   1500 	else
   1501 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_SIGNED;
   1502 	reg |= ESS_AUDIO1_CTRL1_FIFO_CONNECT;
   1503 	ess_write_x_reg(sc, ESS_XCMD_AUDIO1_CTRL1, reg);
   1504 
   1505 	isa_dmastart(sc->sc_ic, sc->sc_audio1.drq, start,
   1506 		     (char *)end - (char *)start, NULL,
   1507 	    DMAMODE_READ | DMAMODE_LOOPDEMAND, BUS_DMA_NOWAIT);
   1508 
   1509 	/* Program transfer count registers with 2's complement of count. */
   1510 	blksize = -blksize;
   1511 	ess_write_x_reg(sc, ESS_XCMD_XFER_COUNTLO, blksize);
   1512 	ess_write_x_reg(sc, ESS_XCMD_XFER_COUNTHI, blksize >> 8);
   1513 
   1514 	/* Use 4 bytes per input DMA. */
   1515 	ess_set_xreg_bits(sc, ESS_XCMD_DEMAND_CTRL, ESS_DEMAND_CTRL_DEMAND_4);
   1516 
   1517 	/* Start auto-init DMA */
   1518 	ess_wdsp(sc, ESS_ACMD_DISABLE_SPKR);
   1519 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO1_CTRL2);
   1520 	reg |= ESS_AUDIO1_CTRL2_DMA_READ | ESS_AUDIO1_CTRL2_ADC_ENABLE;
   1521 	reg |= ESS_AUDIO1_CTRL2_FIFO_ENABLE | ESS_AUDIO1_CTRL2_AUTO_INIT;
   1522 	ess_write_x_reg(sc, ESS_XCMD_AUDIO1_CTRL2, reg);
   1523 
   1524 	return 0;
   1525 }
   1526 
   1527 int
   1528 ess_audio1_halt(void *addr)
   1529 {
   1530 	struct ess_softc *sc;
   1531 
   1532 	sc = addr;
   1533 	DPRINTF(("ess_audio1_halt: sc=%p\n", sc));
   1534 
   1535 	if (sc->sc_audio1.active) {
   1536 		ess_clear_xreg_bits(sc, ESS_XCMD_AUDIO1_CTRL2,
   1537 		    ESS_AUDIO1_CTRL2_FIFO_ENABLE);
   1538 		isa_dmaabort(sc->sc_ic, sc->sc_audio1.drq);
   1539 		if (sc->sc_audio1.polled)
   1540 			callout_stop(&sc->sc_poll1_ch);
   1541 		sc->sc_audio1.active = 0;
   1542 	}
   1543 
   1544 	return 0;
   1545 }
   1546 
   1547 int
   1548 ess_audio2_halt(void *addr)
   1549 {
   1550 	struct ess_softc *sc;
   1551 
   1552 	sc = addr;
   1553 	DPRINTF(("ess_audio2_halt: sc=%p\n", sc));
   1554 
   1555 	if (sc->sc_audio2.active) {
   1556 		ess_clear_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL1,
   1557 		    ESS_AUDIO2_CTRL1_DAC_ENABLE |
   1558 		    ESS_AUDIO2_CTRL1_FIFO_ENABLE);
   1559 		isa_dmaabort(sc->sc_ic, sc->sc_audio2.drq);
   1560 		if (sc->sc_audio2.polled)
   1561 			callout_stop(&sc->sc_poll2_ch);
   1562 		sc->sc_audio2.active = 0;
   1563 	}
   1564 
   1565 	return 0;
   1566 }
   1567 
   1568 int
   1569 ess_audio1_intr(void *arg)
   1570 {
   1571 	struct ess_softc *sc;
   1572 	uint8_t reg;
   1573 	int rv;
   1574 
   1575 	sc = arg;
   1576 	DPRINTFN(1,("ess_audio1_intr: intr=%p\n", sc->sc_audio1.intr));
   1577 
   1578 	mutex_spin_enter(&sc->sc_intr_lock);
   1579 
   1580 	/* Check and clear interrupt on Audio1. */
   1581 	reg = EREAD1(sc->sc_iot, sc->sc_ioh, ESS_DSP_RW_STATUS);
   1582 	if ((reg & ESS_DSP_READ_OFLOW) == 0) {
   1583 		mutex_spin_exit(&sc->sc_intr_lock);
   1584 		return 0;
   1585 	}
   1586 	reg = EREAD1(sc->sc_iot, sc->sc_ioh, ESS_CLEAR_INTR);
   1587 
   1588 	sc->sc_audio1.nintr++;
   1589 
   1590 	if (sc->sc_audio1.active) {
   1591 		(*sc->sc_audio1.intr)(sc->sc_audio1.arg);
   1592 		rv = 1;
   1593 	} else
   1594 		rv = 0;
   1595 
   1596 	mutex_spin_exit(&sc->sc_intr_lock);
   1597 
   1598 	return rv;
   1599 }
   1600 
   1601 int
   1602 ess_audio2_intr(void *arg)
   1603 {
   1604 	struct ess_softc *sc;
   1605 	uint8_t reg;
   1606 	int rv;
   1607 
   1608 	sc = arg;
   1609 	DPRINTFN(1,("ess_audio2_intr: intr=%p\n", sc->sc_audio2.intr));
   1610 
   1611 	mutex_spin_enter(&sc->sc_intr_lock);
   1612 
   1613 	/* Check and clear interrupt on Audio2. */
   1614 	reg = ess_read_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2);
   1615 	if ((reg & ESS_AUDIO2_CTRL2_IRQ_LATCH) == 0) {
   1616 		mutex_spin_exit(&sc->sc_intr_lock);
   1617 		return 0;
   1618 	}
   1619 	reg &= ~ESS_AUDIO2_CTRL2_IRQ_LATCH;
   1620 	ess_write_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2, reg);
   1621 
   1622 	sc->sc_audio2.nintr++;
   1623 
   1624 	if (sc->sc_audio2.active) {
   1625 		(*sc->sc_audio2.intr)(sc->sc_audio2.arg);
   1626 		rv = 1;
   1627 	} else
   1628 		rv = 0;
   1629 
   1630 	mutex_spin_exit(&sc->sc_intr_lock);
   1631 
   1632 	return rv;
   1633 }
   1634 
   1635 void
   1636 ess_audio1_poll(void *addr)
   1637 {
   1638 	struct ess_softc *sc;
   1639 	int dmapos, dmacount;
   1640 
   1641 	sc = addr;
   1642 	mutex_spin_enter(&sc->sc_intr_lock);
   1643 
   1644 	if (!sc->sc_audio1.active) {
   1645 		mutex_spin_exit(&sc->sc_intr_lock);
   1646 		return;
   1647 	}
   1648 
   1649 	sc->sc_audio1.nintr++;
   1650 
   1651 	dmapos = isa_dmacount(sc->sc_ic, sc->sc_audio1.drq);
   1652 	dmacount = sc->sc_audio1.dmapos - dmapos;
   1653 	if (dmacount < 0)
   1654 		dmacount += sc->sc_audio1.buffersize;
   1655 	sc->sc_audio1.dmapos = dmapos;
   1656 #if 1
   1657 	dmacount += sc->sc_audio1.dmacount;
   1658 	while (dmacount > sc->sc_audio1.blksize) {
   1659 		dmacount -= sc->sc_audio1.blksize;
   1660 		(*sc->sc_audio1.intr)(sc->sc_audio1.arg);
   1661 	}
   1662 	sc->sc_audio1.dmacount = dmacount;
   1663 #else
   1664 	(*sc->sc_audio1.intr)(sc->sc_audio1.arg, dmacount);
   1665 #endif
   1666 
   1667 	mutex_spin_exit(&sc->sc_intr_lock);
   1668 	callout_reset(&sc->sc_poll1_ch, hz / 30, ess_audio1_poll, sc);
   1669 }
   1670 
   1671 void
   1672 ess_audio2_poll(void *addr)
   1673 {
   1674 	struct ess_softc *sc;
   1675 	int dmapos, dmacount;
   1676 
   1677 	sc = addr;
   1678 	mutex_spin_enter(&sc->sc_intr_lock);
   1679 
   1680 	if (!sc->sc_audio2.active) {
   1681 		mutex_spin_exit(&sc->sc_intr_lock);
   1682 		return;
   1683 	}
   1684 
   1685 	sc->sc_audio2.nintr++;
   1686 
   1687 	dmapos = isa_dmacount(sc->sc_ic, sc->sc_audio2.drq);
   1688 	dmacount = sc->sc_audio2.dmapos - dmapos;
   1689 	if (dmacount < 0)
   1690 		dmacount += sc->sc_audio2.buffersize;
   1691 	sc->sc_audio2.dmapos = dmapos;
   1692 #if 1
   1693 	dmacount += sc->sc_audio2.dmacount;
   1694 	while (dmacount > sc->sc_audio2.blksize) {
   1695 		dmacount -= sc->sc_audio2.blksize;
   1696 		(*sc->sc_audio2.intr)(sc->sc_audio2.arg);
   1697 	}
   1698 	sc->sc_audio2.dmacount = dmacount;
   1699 #else
   1700 	(*sc->sc_audio2.intr)(sc->sc_audio2.arg, dmacount);
   1701 #endif
   1702 
   1703 	mutex_spin_exit(&sc->sc_intr_lock);
   1704 	callout_reset(&sc->sc_poll2_ch, hz / 30, ess_audio2_poll, sc);
   1705 }
   1706 
   1707 int
   1708 ess_round_blocksize(void *addr, int blk, int mode,
   1709     const audio_params_t *param)
   1710 {
   1711 
   1712 	return blk & -8;	/* round for max DMA size */
   1713 }
   1714 
   1715 int
   1716 ess_set_port(void *addr, mixer_ctrl_t *cp)
   1717 {
   1718 	struct ess_softc *sc;
   1719 	int lgain, rgain;
   1720 
   1721 	sc = addr;
   1722 	DPRINTFN(5,("ess_set_port: port=%d num_channels=%d\n",
   1723 		    cp->dev, cp->un.value.num_channels));
   1724 
   1725 	switch (cp->dev) {
   1726 	/*
   1727 	 * The following mixer ports are all stereo. If we get a
   1728 	 * single-channel gain value passed in, then we duplicate it
   1729 	 * to both left and right channels.
   1730 	 */
   1731 	case ESS_MASTER_VOL:
   1732 	case ESS_DAC_PLAY_VOL:
   1733 	case ESS_MIC_PLAY_VOL:
   1734 	case ESS_LINE_PLAY_VOL:
   1735 	case ESS_SYNTH_PLAY_VOL:
   1736 	case ESS_CD_PLAY_VOL:
   1737 	case ESS_AUXB_PLAY_VOL:
   1738 	case ESS_RECORD_VOL:
   1739 		if (cp->type != AUDIO_MIXER_VALUE)
   1740 			return EINVAL;
   1741 
   1742 		switch (cp->un.value.num_channels) {
   1743 		case 1:
   1744 			lgain = rgain = ESS_4BIT_GAIN(
   1745 			  cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
   1746 			break;
   1747 		case 2:
   1748 			lgain = ESS_4BIT_GAIN(
   1749 			  cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
   1750 			rgain = ESS_4BIT_GAIN(
   1751 			  cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT]);
   1752 			break;
   1753 		default:
   1754 			return EINVAL;
   1755 		}
   1756 
   1757 		sc->gain[cp->dev][ESS_LEFT]  = lgain;
   1758 		sc->gain[cp->dev][ESS_RIGHT] = rgain;
   1759 		ess_set_gain(sc, cp->dev, 1);
   1760 		return 0;
   1761 
   1762 	/*
   1763 	 * The PC speaker port is mono. If we get a stereo gain value
   1764 	 * passed in, then we return EINVAL.
   1765 	 */
   1766 	case ESS_PCSPEAKER_VOL:
   1767 		if (cp->un.value.num_channels != 1)
   1768 			return EINVAL;
   1769 
   1770 		sc->gain[cp->dev][ESS_LEFT] = sc->gain[cp->dev][ESS_RIGHT] =
   1771 		  ESS_3BIT_GAIN(cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
   1772 		ess_set_gain(sc, cp->dev, 1);
   1773 		return 0;
   1774 
   1775 	case ESS_RECORD_SOURCE:
   1776 		if (ESS_USE_AUDIO1(sc->sc_model)) {
   1777 			if (cp->type == AUDIO_MIXER_ENUM)
   1778 				return ess_set_in_port(sc, cp->un.ord);
   1779 			else
   1780 				return EINVAL;
   1781 		} else {
   1782 			if (cp->type == AUDIO_MIXER_SET)
   1783 				return ess_set_in_ports(sc, cp->un.mask);
   1784 			else
   1785 				return EINVAL;
   1786 		}
   1787 		return 0;
   1788 
   1789 	case ESS_RECORD_MONITOR:
   1790 		if (cp->type != AUDIO_MIXER_ENUM)
   1791 			return EINVAL;
   1792 
   1793 		if (cp->un.ord)
   1794 			/* Enable monitor */
   1795 			ess_set_xreg_bits(sc, ESS_XCMD_AUDIO_CTRL,
   1796 					  ESS_AUDIO_CTRL_MONITOR);
   1797 		else
   1798 			/* Disable monitor */
   1799 			ess_clear_xreg_bits(sc, ESS_XCMD_AUDIO_CTRL,
   1800 					    ESS_AUDIO_CTRL_MONITOR);
   1801 		return 0;
   1802 	}
   1803 
   1804 	if (ESS_IS_ES18X9(sc->sc_model)) {
   1805 
   1806 		switch (cp->dev) {
   1807 		case ESS_SPATIALIZER:
   1808 			if (cp->type != AUDIO_MIXER_VALUE ||
   1809 			    cp->un.value.num_channels != 1)
   1810 				return EINVAL;
   1811 
   1812 			sc->gain[cp->dev][ESS_LEFT] =
   1813 				sc->gain[cp->dev][ESS_RIGHT] = ESS_6BIT_GAIN(
   1814 				    cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
   1815 			ess_set_gain(sc, cp->dev, 1);
   1816 			return 0;
   1817 
   1818 		case ESS_SPATIALIZER_ENABLE:
   1819 			if (cp->type != AUDIO_MIXER_ENUM)
   1820 				return EINVAL;
   1821 
   1822 			sc->sc_spatializer = (cp->un.ord != 0);
   1823 			if (sc->sc_spatializer)
   1824 				ess_set_mreg_bits(sc, ESS_MREG_SPATIAL_CTRL,
   1825 				    ESS_SPATIAL_CTRL_ENABLE);
   1826 			else
   1827 				ess_clear_mreg_bits(sc, ESS_MREG_SPATIAL_CTRL,
   1828 				    ESS_SPATIAL_CTRL_ENABLE);
   1829 			return 0;
   1830 		}
   1831 	}
   1832 
   1833 	if (ESS_USE_AUDIO1(sc->sc_model))
   1834 		return EINVAL;
   1835 
   1836 	switch (cp->dev) {
   1837 	case ESS_DAC_REC_VOL:
   1838 	case ESS_MIC_REC_VOL:
   1839 	case ESS_LINE_REC_VOL:
   1840 	case ESS_SYNTH_REC_VOL:
   1841 	case ESS_CD_REC_VOL:
   1842 	case ESS_AUXB_REC_VOL:
   1843 		if (cp->type != AUDIO_MIXER_VALUE)
   1844 			return EINVAL;
   1845 
   1846 		switch (cp->un.value.num_channels) {
   1847 		case 1:
   1848 			lgain = rgain = ESS_4BIT_GAIN(
   1849 			  cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
   1850 			break;
   1851 		case 2:
   1852 			lgain = ESS_4BIT_GAIN(
   1853 			  cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
   1854 			rgain = ESS_4BIT_GAIN(
   1855 			  cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT]);
   1856 			break;
   1857 		default:
   1858 			return EINVAL;
   1859 		}
   1860 
   1861 		sc->gain[cp->dev][ESS_LEFT]  = lgain;
   1862 		sc->gain[cp->dev][ESS_RIGHT] = rgain;
   1863 		ess_set_gain(sc, cp->dev, 1);
   1864 		return 0;
   1865 
   1866 	case ESS_MIC_PREAMP:
   1867 		if (cp->type != AUDIO_MIXER_ENUM)
   1868 			return EINVAL;
   1869 
   1870 		if (cp->un.ord)
   1871 			/* Enable microphone preamp */
   1872 			ess_set_xreg_bits(sc, ESS_XCMD_PREAMP_CTRL,
   1873 					  ESS_PREAMP_CTRL_ENABLE);
   1874 		else
   1875 			/* Disable microphone preamp */
   1876 			ess_clear_xreg_bits(sc, ESS_XCMD_PREAMP_CTRL,
   1877 					  ESS_PREAMP_CTRL_ENABLE);
   1878 		return 0;
   1879 	}
   1880 
   1881 	return EINVAL;
   1882 }
   1883 
   1884 int
   1885 ess_get_port(void *addr, mixer_ctrl_t *cp)
   1886 {
   1887 	struct ess_softc *sc;
   1888 
   1889 	sc = addr;
   1890 	DPRINTFN(5,("ess_get_port: port=%d\n", cp->dev));
   1891 
   1892 	switch (cp->dev) {
   1893 	case ESS_MASTER_VOL:
   1894 	case ESS_DAC_PLAY_VOL:
   1895 	case ESS_MIC_PLAY_VOL:
   1896 	case ESS_LINE_PLAY_VOL:
   1897 	case ESS_SYNTH_PLAY_VOL:
   1898 	case ESS_CD_PLAY_VOL:
   1899 	case ESS_AUXB_PLAY_VOL:
   1900 	case ESS_RECORD_VOL:
   1901 		switch (cp->un.value.num_channels) {
   1902 		case 1:
   1903 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
   1904 				sc->gain[cp->dev][ESS_LEFT];
   1905 			break;
   1906 		case 2:
   1907 			cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
   1908 				sc->gain[cp->dev][ESS_LEFT];
   1909 			cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
   1910 				sc->gain[cp->dev][ESS_RIGHT];
   1911 			break;
   1912 		default:
   1913 			return EINVAL;
   1914 		}
   1915 		return 0;
   1916 
   1917 	case ESS_PCSPEAKER_VOL:
   1918 		if (cp->un.value.num_channels != 1)
   1919 			return EINVAL;
   1920 
   1921 		cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
   1922 			sc->gain[cp->dev][ESS_LEFT];
   1923 		return 0;
   1924 
   1925 	case ESS_RECORD_SOURCE:
   1926 		if (ESS_USE_AUDIO1(sc->sc_model))
   1927 			cp->un.ord = sc->in_port;
   1928 		else
   1929 			cp->un.mask = sc->in_mask;
   1930 		return 0;
   1931 
   1932 	case ESS_RECORD_MONITOR:
   1933 		cp->un.ord = (ess_read_x_reg(sc, ESS_XCMD_AUDIO_CTRL) &
   1934 			      ESS_AUDIO_CTRL_MONITOR) ? 1 : 0;
   1935 		return 0;
   1936 	}
   1937 
   1938 	if (ESS_IS_ES18X9(sc->sc_model)) {
   1939 
   1940 		switch (cp->dev) {
   1941 		case ESS_SPATIALIZER:
   1942 			if (cp->un.value.num_channels != 1)
   1943 				return EINVAL;
   1944 
   1945 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
   1946 				sc->gain[cp->dev][ESS_LEFT];
   1947 			return 0;
   1948 
   1949 		case ESS_SPATIALIZER_ENABLE:
   1950 			cp->un.ord = sc->sc_spatializer;
   1951 			return 0;
   1952 		}
   1953 	}
   1954 
   1955 	if (ESS_USE_AUDIO1(sc->sc_model))
   1956 		return EINVAL;
   1957 
   1958 	switch (cp->dev) {
   1959 	case ESS_DAC_REC_VOL:
   1960 	case ESS_MIC_REC_VOL:
   1961 	case ESS_LINE_REC_VOL:
   1962 	case ESS_SYNTH_REC_VOL:
   1963 	case ESS_CD_REC_VOL:
   1964 	case ESS_AUXB_REC_VOL:
   1965 		switch (cp->un.value.num_channels) {
   1966 		case 1:
   1967 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
   1968 				sc->gain[cp->dev][ESS_LEFT];
   1969 			break;
   1970 		case 2:
   1971 			cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
   1972 				sc->gain[cp->dev][ESS_LEFT];
   1973 			cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
   1974 				sc->gain[cp->dev][ESS_RIGHT];
   1975 			break;
   1976 		default:
   1977 			return EINVAL;
   1978 		}
   1979 		return 0;
   1980 
   1981 	case ESS_MIC_PREAMP:
   1982 		cp->un.ord = (ess_read_x_reg(sc, ESS_XCMD_PREAMP_CTRL) &
   1983 			      ESS_PREAMP_CTRL_ENABLE) ? 1 : 0;
   1984 		return 0;
   1985 	}
   1986 
   1987 	return EINVAL;
   1988 }
   1989 
   1990 int
   1991 ess_query_devinfo(void *addr, mixer_devinfo_t *dip)
   1992 {
   1993 	struct ess_softc *sc;
   1994 
   1995 	sc = addr;
   1996 	DPRINTFN(5,("ess_query_devinfo: model=%d index=%d\n",
   1997 		    sc->sc_model, dip->index));
   1998 
   1999 	/*
   2000 	 * REVISIT: There are some slight differences between the
   2001 	 *          mixers on the different ESS chips, which can
   2002 	 *          be sorted out using the chip model rather than a
   2003 	 *          separate mixer model.
   2004 	 *          This is currently coded assuming an ES1887; we
   2005 	 *          need to work out which bits are not applicable to
   2006 	 *          the other models (1888 and 888).
   2007 	 */
   2008 	switch (dip->index) {
   2009 	case ESS_DAC_PLAY_VOL:
   2010 		dip->mixer_class = ESS_INPUT_CLASS;
   2011 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2012 		strcpy(dip->label.name, AudioNdac);
   2013 		dip->type = AUDIO_MIXER_VALUE;
   2014 		dip->un.v.num_channels = 2;
   2015 		strcpy(dip->un.v.units.name, AudioNvolume);
   2016 		return 0;
   2017 
   2018 	case ESS_MIC_PLAY_VOL:
   2019 		dip->mixer_class = ESS_INPUT_CLASS;
   2020 		dip->prev = AUDIO_MIXER_LAST;
   2021 		if (ESS_USE_AUDIO1(sc->sc_model))
   2022 			dip->next = AUDIO_MIXER_LAST;
   2023 		else
   2024 			dip->next = ESS_MIC_PREAMP;
   2025 		strcpy(dip->label.name, AudioNmicrophone);
   2026 		dip->type = AUDIO_MIXER_VALUE;
   2027 		dip->un.v.num_channels = 2;
   2028 		strcpy(dip->un.v.units.name, AudioNvolume);
   2029 		return 0;
   2030 
   2031 	case ESS_LINE_PLAY_VOL:
   2032 		dip->mixer_class = ESS_INPUT_CLASS;
   2033 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2034 		strcpy(dip->label.name, AudioNline);
   2035 		dip->type = AUDIO_MIXER_VALUE;
   2036 		dip->un.v.num_channels = 2;
   2037 		strcpy(dip->un.v.units.name, AudioNvolume);
   2038 		return 0;
   2039 
   2040 	case ESS_SYNTH_PLAY_VOL:
   2041 		dip->mixer_class = ESS_INPUT_CLASS;
   2042 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2043 		strcpy(dip->label.name, AudioNfmsynth);
   2044 		dip->type = AUDIO_MIXER_VALUE;
   2045 		dip->un.v.num_channels = 2;
   2046 		strcpy(dip->un.v.units.name, AudioNvolume);
   2047 		return 0;
   2048 
   2049 	case ESS_CD_PLAY_VOL:
   2050 		dip->mixer_class = ESS_INPUT_CLASS;
   2051 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2052 		strcpy(dip->label.name, AudioNcd);
   2053 		dip->type = AUDIO_MIXER_VALUE;
   2054 		dip->un.v.num_channels = 2;
   2055 		strcpy(dip->un.v.units.name, AudioNvolume);
   2056 		return 0;
   2057 
   2058 	case ESS_AUXB_PLAY_VOL:
   2059 		dip->mixer_class = ESS_INPUT_CLASS;
   2060 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2061 		strcpy(dip->label.name, "auxb");
   2062 		dip->type = AUDIO_MIXER_VALUE;
   2063 		dip->un.v.num_channels = 2;
   2064 		strcpy(dip->un.v.units.name, AudioNvolume);
   2065 		return 0;
   2066 
   2067 	case ESS_INPUT_CLASS:
   2068 		dip->mixer_class = ESS_INPUT_CLASS;
   2069 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2070 		strcpy(dip->label.name, AudioCinputs);
   2071 		dip->type = AUDIO_MIXER_CLASS;
   2072 		return 0;
   2073 
   2074 	case ESS_MASTER_VOL:
   2075 		dip->mixer_class = ESS_OUTPUT_CLASS;
   2076 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2077 		strcpy(dip->label.name, AudioNmaster);
   2078 		dip->type = AUDIO_MIXER_VALUE;
   2079 		dip->un.v.num_channels = 2;
   2080 		strcpy(dip->un.v.units.name, AudioNvolume);
   2081 		return 0;
   2082 
   2083 	case ESS_PCSPEAKER_VOL:
   2084 		dip->mixer_class = ESS_OUTPUT_CLASS;
   2085 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2086 		strcpy(dip->label.name, "pc_speaker");
   2087 		dip->type = AUDIO_MIXER_VALUE;
   2088 		dip->un.v.num_channels = 1;
   2089 		strcpy(dip->un.v.units.name, AudioNvolume);
   2090 		return 0;
   2091 
   2092 	case ESS_OUTPUT_CLASS:
   2093 		dip->mixer_class = ESS_OUTPUT_CLASS;
   2094 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2095 		strcpy(dip->label.name, AudioCoutputs);
   2096 		dip->type = AUDIO_MIXER_CLASS;
   2097 		return 0;
   2098 
   2099 	case ESS_RECORD_VOL:
   2100 		dip->mixer_class = ESS_RECORD_CLASS;
   2101 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2102 		strcpy(dip->label.name, AudioNrecord);
   2103 		dip->type = AUDIO_MIXER_VALUE;
   2104 		dip->un.v.num_channels = 2;
   2105 		strcpy(dip->un.v.units.name, AudioNvolume);
   2106 		return 0;
   2107 
   2108 	case ESS_RECORD_SOURCE:
   2109 		dip->mixer_class = ESS_RECORD_CLASS;
   2110 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2111 		strcpy(dip->label.name, AudioNsource);
   2112 		if (ESS_USE_AUDIO1(sc->sc_model)) {
   2113 			/*
   2114 			 * The 1788 doesn't use the input mixer control that
   2115 			 * the 1888 uses, because it's a pain when you only
   2116 			 * have one mixer.
   2117 			 * Perhaps it could be emulated by keeping both sets of
   2118 			 * gain values, and doing a `context switch' of the
   2119 			 * mixer registers when shifting from playing to
   2120 			 * recording.
   2121 			 */
   2122 			dip->type = AUDIO_MIXER_ENUM;
   2123 			dip->un.e.num_mem = 4;
   2124 			strcpy(dip->un.e.member[0].label.name, AudioNmicrophone);
   2125 			dip->un.e.member[0].ord = ESS_SOURCE_MIC;
   2126 			strcpy(dip->un.e.member[1].label.name, AudioNline);
   2127 			dip->un.e.member[1].ord = ESS_SOURCE_LINE;
   2128 			strcpy(dip->un.e.member[2].label.name, AudioNcd);
   2129 			dip->un.e.member[2].ord = ESS_SOURCE_CD;
   2130 			strcpy(dip->un.e.member[3].label.name, AudioNmixerout);
   2131 			dip->un.e.member[3].ord = ESS_SOURCE_MIXER;
   2132 		} else {
   2133 			dip->type = AUDIO_MIXER_SET;
   2134 			dip->un.s.num_mem = 6;
   2135 			strcpy(dip->un.s.member[0].label.name, AudioNdac);
   2136 			dip->un.s.member[0].mask = 1 << ESS_DAC_REC_VOL;
   2137 			strcpy(dip->un.s.member[1].label.name, AudioNmicrophone);
   2138 			dip->un.s.member[1].mask = 1 << ESS_MIC_REC_VOL;
   2139 			strcpy(dip->un.s.member[2].label.name, AudioNline);
   2140 			dip->un.s.member[2].mask = 1 << ESS_LINE_REC_VOL;
   2141 			strcpy(dip->un.s.member[3].label.name, AudioNfmsynth);
   2142 			dip->un.s.member[3].mask = 1 << ESS_SYNTH_REC_VOL;
   2143 			strcpy(dip->un.s.member[4].label.name, AudioNcd);
   2144 			dip->un.s.member[4].mask = 1 << ESS_CD_REC_VOL;
   2145 			strcpy(dip->un.s.member[5].label.name, "auxb");
   2146 			dip->un.s.member[5].mask = 1 << ESS_AUXB_REC_VOL;
   2147 		}
   2148 		return 0;
   2149 
   2150 	case ESS_RECORD_CLASS:
   2151 		dip->mixer_class = ESS_RECORD_CLASS;
   2152 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2153 		strcpy(dip->label.name, AudioCrecord);
   2154 		dip->type = AUDIO_MIXER_CLASS;
   2155 		return 0;
   2156 
   2157 	case ESS_RECORD_MONITOR:
   2158 		dip->prev = dip->next = AUDIO_MIXER_LAST;
   2159 		strcpy(dip->label.name, AudioNmute);
   2160 		dip->type = AUDIO_MIXER_ENUM;
   2161 		dip->mixer_class = ESS_MONITOR_CLASS;
   2162 		dip->un.e.num_mem = 2;
   2163 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
   2164 		dip->un.e.member[0].ord = 0;
   2165 		strcpy(dip->un.e.member[1].label.name, AudioNon);
   2166 		dip->un.e.member[1].ord = 1;
   2167 		return 0;
   2168 
   2169 	case ESS_MONITOR_CLASS:
   2170 		dip->mixer_class = ESS_MONITOR_CLASS;
   2171 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2172 		strcpy(dip->label.name, AudioCmonitor);
   2173 		dip->type = AUDIO_MIXER_CLASS;
   2174 		return 0;
   2175 	}
   2176 
   2177 	if (ESS_IS_ES18X9(sc->sc_model)) {
   2178 
   2179 		switch (dip->index) {
   2180 		case ESS_SPATIALIZER:
   2181 			dip->mixer_class = ESS_OUTPUT_CLASS;
   2182 			dip->prev = AUDIO_MIXER_LAST;
   2183 			dip->next = ESS_SPATIALIZER_ENABLE;
   2184 			strcpy(dip->label.name, AudioNspatial);
   2185 			dip->type = AUDIO_MIXER_VALUE;
   2186 			dip->un.v.num_channels = 1;
   2187 			strcpy(dip->un.v.units.name, "level");
   2188 			return 0;
   2189 
   2190 		case ESS_SPATIALIZER_ENABLE:
   2191 			dip->mixer_class = ESS_OUTPUT_CLASS;
   2192 			dip->prev = ESS_SPATIALIZER;
   2193 			dip->next = AUDIO_MIXER_LAST;
   2194 			strcpy(dip->label.name, "enable");
   2195 			dip->type = AUDIO_MIXER_ENUM;
   2196 			dip->un.e.num_mem = 2;
   2197 			strcpy(dip->un.e.member[0].label.name, AudioNoff);
   2198 			dip->un.e.member[0].ord = 0;
   2199 			strcpy(dip->un.e.member[1].label.name, AudioNon);
   2200 			dip->un.e.member[1].ord = 1;
   2201 			return 0;
   2202 		}
   2203 	}
   2204 
   2205 	if (ESS_USE_AUDIO1(sc->sc_model))
   2206 		return ENXIO;
   2207 
   2208 	switch (dip->index) {
   2209 	case ESS_DAC_REC_VOL:
   2210 		dip->mixer_class = ESS_RECORD_CLASS;
   2211 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2212 		strcpy(dip->label.name, AudioNdac);
   2213 		dip->type = AUDIO_MIXER_VALUE;
   2214 		dip->un.v.num_channels = 2;
   2215 		strcpy(dip->un.v.units.name, AudioNvolume);
   2216 		return 0;
   2217 
   2218 	case ESS_MIC_REC_VOL:
   2219 		dip->mixer_class = ESS_RECORD_CLASS;
   2220 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2221 		strcpy(dip->label.name, AudioNmicrophone);
   2222 		dip->type = AUDIO_MIXER_VALUE;
   2223 		dip->un.v.num_channels = 2;
   2224 		strcpy(dip->un.v.units.name, AudioNvolume);
   2225 		return 0;
   2226 
   2227 	case ESS_LINE_REC_VOL:
   2228 		dip->mixer_class = ESS_RECORD_CLASS;
   2229 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2230 		strcpy(dip->label.name, AudioNline);
   2231 		dip->type = AUDIO_MIXER_VALUE;
   2232 		dip->un.v.num_channels = 2;
   2233 		strcpy(dip->un.v.units.name, AudioNvolume);
   2234 		return 0;
   2235 
   2236 	case ESS_SYNTH_REC_VOL:
   2237 		dip->mixer_class = ESS_RECORD_CLASS;
   2238 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2239 		strcpy(dip->label.name, AudioNfmsynth);
   2240 		dip->type = AUDIO_MIXER_VALUE;
   2241 		dip->un.v.num_channels = 2;
   2242 		strcpy(dip->un.v.units.name, AudioNvolume);
   2243 		return 0;
   2244 
   2245 	case ESS_CD_REC_VOL:
   2246 		dip->mixer_class = ESS_RECORD_CLASS;
   2247 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2248 		strcpy(dip->label.name, AudioNcd);
   2249 		dip->type = AUDIO_MIXER_VALUE;
   2250 		dip->un.v.num_channels = 2;
   2251 		strcpy(dip->un.v.units.name, AudioNvolume);
   2252 		return 0;
   2253 
   2254 	case ESS_AUXB_REC_VOL:
   2255 		dip->mixer_class = ESS_RECORD_CLASS;
   2256 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2257 		strcpy(dip->label.name, "auxb");
   2258 		dip->type = AUDIO_MIXER_VALUE;
   2259 		dip->un.v.num_channels = 2;
   2260 		strcpy(dip->un.v.units.name, AudioNvolume);
   2261 		return 0;
   2262 
   2263 	case ESS_MIC_PREAMP:
   2264 		dip->mixer_class = ESS_INPUT_CLASS;
   2265 		dip->prev = ESS_MIC_PLAY_VOL;
   2266 		dip->next = AUDIO_MIXER_LAST;
   2267 		strcpy(dip->label.name, AudioNpreamp);
   2268 		dip->type = AUDIO_MIXER_ENUM;
   2269 		dip->un.e.num_mem = 2;
   2270 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
   2271 		dip->un.e.member[0].ord = 0;
   2272 		strcpy(dip->un.e.member[1].label.name, AudioNon);
   2273 		dip->un.e.member[1].ord = 1;
   2274 		return 0;
   2275 	}
   2276 
   2277 	return ENXIO;
   2278 }
   2279 
   2280 void *
   2281 ess_malloc(void *addr, int direction, size_t size)
   2282 {
   2283 	struct ess_softc *sc;
   2284 	int drq;
   2285 
   2286 	sc = addr;
   2287 	if ((!ESS_USE_AUDIO1(sc->sc_model)) && direction == AUMODE_PLAY)
   2288 		drq = sc->sc_audio2.drq;
   2289 	else
   2290 		drq = sc->sc_audio1.drq;
   2291 	return (isa_malloc(sc->sc_ic, drq, size, M_DEVBUF, M_WAITOK));
   2292 }
   2293 
   2294 void
   2295 ess_free(void *addr, void *ptr, size_t size)
   2296 {
   2297 
   2298 	isa_free(ptr, M_DEVBUF);
   2299 }
   2300 
   2301 size_t
   2302 ess_round_buffersize(void *addr, int direction, size_t size)
   2303 {
   2304 	struct ess_softc *sc;
   2305 	bus_size_t maxsize;
   2306 
   2307 	sc = addr;
   2308 	if ((!ESS_USE_AUDIO1(sc->sc_model)) && direction == AUMODE_PLAY)
   2309 		maxsize = sc->sc_audio2.maxsize;
   2310 	else
   2311 		maxsize = sc->sc_audio1.maxsize;
   2312 
   2313 	if (size > maxsize)
   2314 		size = maxsize;
   2315 	return size;
   2316 }
   2317 
   2318 paddr_t
   2319 ess_mappage(void *addr, void *mem, off_t off, int prot)
   2320 {
   2321 
   2322 	return isa_mappage(mem, off, prot);
   2323 }
   2324 
   2325 int
   2326 ess_1788_get_props(void *addr)
   2327 {
   2328 
   2329 	return AUDIO_PROP_MMAP | AUDIO_PROP_INDEPENDENT;
   2330 }
   2331 
   2332 int
   2333 ess_1888_get_props(void *addr)
   2334 {
   2335 
   2336 	return AUDIO_PROP_MMAP | AUDIO_PROP_INDEPENDENT | AUDIO_PROP_FULLDUPLEX;
   2337 }
   2338 
   2339 void
   2340 ess_get_locks(void *addr, kmutex_t **intr, kmutex_t **thread)
   2341 {
   2342 	struct ess_softc *sc;
   2343 
   2344 	sc = addr;
   2345 	*intr = &sc->sc_intr_lock;
   2346 	*thread = &sc->sc_lock;
   2347 }
   2348 
   2349 
   2350 /* ============================================
   2351  * Generic functions for ess, not used by audio h/w i/f
   2352  * =============================================
   2353  */
   2354 
   2355 /*
   2356  * Reset the chip.
   2357  * Return non-zero if the chip isn't detected.
   2358  */
   2359 int
   2360 ess_reset(struct ess_softc *sc)
   2361 {
   2362 	bus_space_tag_t iot;
   2363 	bus_space_handle_t ioh;
   2364 
   2365 	iot = sc->sc_iot;
   2366 	ioh = sc->sc_ioh;
   2367 	sc->sc_audio1.active = 0;
   2368 	sc->sc_audio2.active = 0;
   2369 
   2370 	EWRITE1(iot, ioh, ESS_DSP_RESET, ESS_RESET_EXT);
   2371 	delay(10000);		/* XXX shouldn't delay so long */
   2372 	EWRITE1(iot, ioh, ESS_DSP_RESET, 0);
   2373 	if (ess_rdsp(sc) != ESS_MAGIC)
   2374 		return 1;
   2375 
   2376 	/* Enable access to the ESS extension commands. */
   2377 	ess_wdsp(sc, ESS_ACMD_ENABLE_EXT);
   2378 
   2379 	return 0;
   2380 }
   2381 
   2382 void
   2383 ess_set_gain(struct ess_softc *sc, int port, int on)
   2384 {
   2385 	int gain, left, right;
   2386 	int mix;
   2387 	int src;
   2388 	int stereo;
   2389 
   2390 	/*
   2391 	 * Most gain controls are found in the mixer registers and
   2392 	 * are stereo. Any that are not, must set mix and stereo as
   2393 	 * required.
   2394 	 */
   2395 	mix = 1;
   2396 	stereo = 1;
   2397 
   2398 	if (ESS_IS_ES18X9(sc->sc_model)) {
   2399 		switch (port) {
   2400 		case ESS_SPATIALIZER:
   2401 			src = ESS_MREG_SPATIAL_LEVEL;
   2402 			stereo = -1;
   2403 			goto skip;
   2404 		case ESS_SPATIALIZER_ENABLE:
   2405 			return;
   2406 		}
   2407 	}
   2408 	switch (port) {
   2409 	case ESS_MASTER_VOL:
   2410 		src = ESS_MREG_VOLUME_MASTER;
   2411 		break;
   2412 	case ESS_DAC_PLAY_VOL:
   2413 		if (ESS_USE_AUDIO1(sc->sc_model))
   2414 			src = ESS_MREG_VOLUME_VOICE;
   2415 		else
   2416 			src = 0x7C;
   2417 		break;
   2418 	case ESS_MIC_PLAY_VOL:
   2419 		src = ESS_MREG_VOLUME_MIC;
   2420 		break;
   2421 	case ESS_LINE_PLAY_VOL:
   2422 		src = ESS_MREG_VOLUME_LINE;
   2423 		break;
   2424 	case ESS_SYNTH_PLAY_VOL:
   2425 		src = ESS_MREG_VOLUME_SYNTH;
   2426 		break;
   2427 	case ESS_CD_PLAY_VOL:
   2428 		src = ESS_MREG_VOLUME_CD;
   2429 		break;
   2430 	case ESS_AUXB_PLAY_VOL:
   2431 		src = ESS_MREG_VOLUME_AUXB;
   2432 		break;
   2433 	case ESS_PCSPEAKER_VOL:
   2434 		src = ESS_MREG_VOLUME_PCSPKR;
   2435 		stereo = 0;
   2436 		break;
   2437 	case ESS_DAC_REC_VOL:
   2438 		src = 0x69;
   2439 		break;
   2440 	case ESS_MIC_REC_VOL:
   2441 		src = 0x68;
   2442 		break;
   2443 	case ESS_LINE_REC_VOL:
   2444 		src = 0x6E;
   2445 		break;
   2446 	case ESS_SYNTH_REC_VOL:
   2447 		src = 0x6B;
   2448 		break;
   2449 	case ESS_CD_REC_VOL:
   2450 		src = 0x6A;
   2451 		break;
   2452 	case ESS_AUXB_REC_VOL:
   2453 		src = 0x6C;
   2454 		break;
   2455 	case ESS_RECORD_VOL:
   2456 		src = ESS_XCMD_VOLIN_CTRL;
   2457 		mix = 0;
   2458 		break;
   2459 	default:
   2460 		return;
   2461 	}
   2462 skip:
   2463 
   2464 	/* 1788 doesn't have a separate recording mixer */
   2465 	if (ESS_USE_AUDIO1(sc->sc_model) && mix && src > 0x62)
   2466 		return;
   2467 
   2468 	if (on) {
   2469 		left = sc->gain[port][ESS_LEFT];
   2470 		right = sc->gain[port][ESS_RIGHT];
   2471 	} else {
   2472 		left = right = 0;
   2473 	}
   2474 
   2475 	if (stereo == -1)
   2476 		gain = ESS_SPATIAL_GAIN(left);
   2477 	else if (stereo)
   2478 		gain = ESS_STEREO_GAIN(left, right);
   2479 	else
   2480 		gain = ESS_MONO_GAIN(left);
   2481 
   2482 	if (mix)
   2483 		ess_write_mix_reg(sc, src, gain);
   2484 	else
   2485 		ess_write_x_reg(sc, src, gain);
   2486 }
   2487 
   2488 /* Set the input device on devices without an input mixer. */
   2489 int
   2490 ess_set_in_port(struct ess_softc *sc, int ord)
   2491 {
   2492 	mixer_devinfo_t di;
   2493 	int i;
   2494 
   2495 	DPRINTF(("ess_set_in_port: ord=0x%x\n", ord));
   2496 
   2497 	/*
   2498 	 * Get the device info for the record source control,
   2499 	 * including the list of available sources.
   2500 	 */
   2501 	di.index = ESS_RECORD_SOURCE;
   2502 	if (ess_query_devinfo(sc, &di))
   2503 		return EINVAL;
   2504 
   2505 	/* See if the given ord value was anywhere in the list. */
   2506 	for (i = 0; i < di.un.e.num_mem; i++) {
   2507 		if (ord == di.un.e.member[i].ord)
   2508 			break;
   2509 	}
   2510 	if (i == di.un.e.num_mem)
   2511 		return EINVAL;
   2512 
   2513 	ess_write_mix_reg(sc, ESS_MREG_ADC_SOURCE, ord);
   2514 
   2515 	sc->in_port = ord;
   2516 	return 0;
   2517 }
   2518 
   2519 /* Set the input device levels on input-mixer-enabled devices. */
   2520 int
   2521 ess_set_in_ports(struct ess_softc *sc, int mask)
   2522 {
   2523 	mixer_devinfo_t di;
   2524 	int i, port;
   2525 
   2526 	DPRINTF(("ess_set_in_ports: mask=0x%x\n", mask));
   2527 
   2528 	/*
   2529 	 * Get the device info for the record source control,
   2530 	 * including the list of available sources.
   2531 	 */
   2532 	di.index = ESS_RECORD_SOURCE;
   2533 	if (ess_query_devinfo(sc, &di))
   2534 		return EINVAL;
   2535 
   2536 	/*
   2537 	 * Set or disable the record volume control for each of the
   2538 	 * possible sources.
   2539 	 */
   2540 	for (i = 0; i < di.un.s.num_mem; i++) {
   2541 		/*
   2542 		 * Calculate the source port number from its mask.
   2543 		 */
   2544 		port = ffs(di.un.s.member[i].mask);
   2545 
   2546 		/*
   2547 		 * Set the source gain:
   2548 		 *	to the current value if source is enabled
   2549 		 *	to zero if source is disabled
   2550 		 */
   2551 		ess_set_gain(sc, port, mask & di.un.s.member[i].mask);
   2552 	}
   2553 
   2554 	sc->in_mask = mask;
   2555 	return 0;
   2556 }
   2557 
   2558 void
   2559 ess_speaker_on(struct ess_softc *sc)
   2560 {
   2561 
   2562 	/* Unmute the DAC. */
   2563 	ess_set_gain(sc, ESS_DAC_PLAY_VOL, 1);
   2564 }
   2565 
   2566 void
   2567 ess_speaker_off(struct ess_softc *sc)
   2568 {
   2569 
   2570 	/* Mute the DAC. */
   2571 	ess_set_gain(sc, ESS_DAC_PLAY_VOL, 0);
   2572 }
   2573 
   2574 /*
   2575  * Calculate the time constant for the requested sampling rate.
   2576  */
   2577 u_int
   2578 ess_srtotc(struct ess_softc *sc, u_int rate)
   2579 {
   2580 	u_int tc;
   2581 
   2582 	/* The following formulae are from the ESS data sheet. */
   2583 	if (ESS_IS_ES18X9(sc->sc_model)) {
   2584 		if ((rate % 8000) != 0)
   2585 			tc = 128 - 793800L / rate;
   2586 		else
   2587 			tc = 256 - 768000L / rate;
   2588 	} else {
   2589 		if (rate <= 22050)
   2590 			tc = 128 - 397700L / rate;
   2591 		else
   2592 			tc = 256 - 795500L / rate;
   2593 	}
   2594 
   2595 	return tc;
   2596 }
   2597 
   2598 
   2599 /*
   2600  * Calculate the filter constant for the reuqested sampling rate.
   2601  */
   2602 u_int
   2603 ess_srtofc(u_int rate)
   2604 {
   2605 	/*
   2606 	 * The following formula is derived from the information in
   2607 	 * the ES1887 data sheet, based on a roll-off frequency of
   2608 	 * 87%.
   2609 	 */
   2610 	return 256 - 200279L / rate;
   2611 }
   2612 
   2613 
   2614 /*
   2615  * Return the status of the DSP.
   2616  */
   2617 u_char
   2618 ess_get_dsp_status(struct ess_softc *sc)
   2619 {
   2620 	return EREAD1(sc->sc_iot, sc->sc_ioh, ESS_DSP_RW_STATUS);
   2621 }
   2622 
   2623 
   2624 /*
   2625  * Return the read status of the DSP:	1 -> DSP ready for reading
   2626  *					0 -> DSP not ready for reading
   2627  */
   2628 u_char
   2629 ess_dsp_read_ready(struct ess_softc *sc)
   2630 {
   2631 
   2632 	return (ess_get_dsp_status(sc) & ESS_DSP_READ_READY) ? 1 : 0;
   2633 }
   2634 
   2635 
   2636 /*
   2637  * Return the write status of the DSP:	1 -> DSP ready for writing
   2638  *					0 -> DSP not ready for writing
   2639  */
   2640 u_char
   2641 ess_dsp_write_ready(struct ess_softc *sc)
   2642 {
   2643 	return (ess_get_dsp_status(sc) & ESS_DSP_WRITE_BUSY) ? 0 : 1;
   2644 }
   2645 
   2646 
   2647 /*
   2648  * Read a byte from the DSP.
   2649  */
   2650 int
   2651 ess_rdsp(struct ess_softc *sc)
   2652 {
   2653 	bus_space_tag_t iot;
   2654 	bus_space_handle_t ioh;
   2655 	int i;
   2656 
   2657 	iot = sc->sc_iot;
   2658 	ioh = sc->sc_ioh;
   2659 	for (i = ESS_READ_TIMEOUT; i > 0; --i) {
   2660 		if (ess_dsp_read_ready(sc)) {
   2661 			i = EREAD1(iot, ioh, ESS_DSP_READ);
   2662 			DPRINTFN(8,("ess_rdsp() = 0x%02x\n", i));
   2663 			return i;
   2664 		} else
   2665 			delay(10);
   2666 	}
   2667 
   2668 	DPRINTF(("ess_rdsp: timed out\n"));
   2669 	return -1;
   2670 }
   2671 
   2672 /*
   2673  * Write a byte to the DSP.
   2674  */
   2675 int
   2676 ess_wdsp(struct ess_softc *sc, u_char v)
   2677 {
   2678 	bus_space_tag_t iot;
   2679 	bus_space_handle_t ioh;
   2680 	int i;
   2681 
   2682 	DPRINTFN(8,("ess_wdsp(0x%02x)\n", v));
   2683 
   2684 	iot = sc->sc_iot;
   2685 	ioh = sc->sc_ioh;
   2686 	for (i = ESS_WRITE_TIMEOUT; i > 0; --i) {
   2687 		if (ess_dsp_write_ready(sc)) {
   2688 			EWRITE1(iot, ioh, ESS_DSP_WRITE, v);
   2689 			return 0;
   2690 		} else
   2691 			delay(10);
   2692 	}
   2693 
   2694 	DPRINTF(("ess_wdsp(0x%02x): timed out\n", v));
   2695 	return -1;
   2696 }
   2697 
   2698 /*
   2699  * Write a value to one of the ESS extended registers.
   2700  */
   2701 int
   2702 ess_write_x_reg(struct ess_softc *sc, u_char reg, u_char val)
   2703 {
   2704 	int error;
   2705 
   2706 	DPRINTFN(2,("ess_write_x_reg: %02x=%02x\n", reg, val));
   2707 	if ((error = ess_wdsp(sc, reg)) == 0)
   2708 		error = ess_wdsp(sc, val);
   2709 
   2710 	return error;
   2711 }
   2712 
   2713 /*
   2714  * Read the value of one of the ESS extended registers.
   2715  */
   2716 u_char
   2717 ess_read_x_reg(struct ess_softc *sc, u_char reg)
   2718 {
   2719 	int error;
   2720 	int val;
   2721 
   2722 	if ((error = ess_wdsp(sc, 0xC0)) == 0)
   2723 		error = ess_wdsp(sc, reg);
   2724 	if (error) {
   2725 		DPRINTF(("Error reading extended register 0x%02x\n", reg));
   2726 	}
   2727 /* REVISIT: what if an error is returned above? */
   2728 	val = ess_rdsp(sc);
   2729 	DPRINTFN(2,("ess_read_x_reg: %02x=%02x\n", reg, val));
   2730 	return val;
   2731 }
   2732 
   2733 void
   2734 ess_clear_xreg_bits(struct ess_softc *sc, u_char reg, u_char mask)
   2735 {
   2736 	if (ess_write_x_reg(sc, reg, ess_read_x_reg(sc, reg) & ~mask) == -1) {
   2737 		DPRINTF(("Error clearing bits in extended register 0x%02x\n",
   2738 			 reg));
   2739 	}
   2740 }
   2741 
   2742 void
   2743 ess_set_xreg_bits(struct ess_softc *sc, u_char reg, u_char mask)
   2744 {
   2745 	if (ess_write_x_reg(sc, reg, ess_read_x_reg(sc, reg) | mask) == -1) {
   2746 		DPRINTF(("Error setting bits in extended register 0x%02x\n",
   2747 			 reg));
   2748 	}
   2749 }
   2750 
   2751 
   2752 /*
   2753  * Write a value to one of the ESS mixer registers.
   2754  */
   2755 void
   2756 ess_write_mix_reg(struct ess_softc *sc, u_char reg, u_char val)
   2757 {
   2758 	bus_space_tag_t iot;
   2759 	bus_space_handle_t ioh;
   2760 
   2761 	DPRINTFN(2,("ess_write_mix_reg: %x=%x\n", reg, val));
   2762 
   2763 	iot = sc->sc_iot;
   2764 	ioh = sc->sc_ioh;
   2765 	EWRITE1(iot, ioh, ESS_MIX_REG_SELECT, reg);
   2766 	EWRITE1(iot, ioh, ESS_MIX_REG_DATA, val);
   2767 }
   2768 
   2769 /*
   2770  * Read the value of one of the ESS mixer registers.
   2771  */
   2772 u_char
   2773 ess_read_mix_reg(struct ess_softc *sc, u_char reg)
   2774 {
   2775 	bus_space_tag_t iot;
   2776 	bus_space_handle_t ioh;
   2777 	u_char val;
   2778 
   2779 	iot = sc->sc_iot;
   2780 	ioh = sc->sc_ioh;
   2781 	EWRITE1(iot, ioh, ESS_MIX_REG_SELECT, reg);
   2782 	val = EREAD1(iot, ioh, ESS_MIX_REG_DATA);
   2783 
   2784 	DPRINTFN(2,("ess_read_mix_reg: %x=%x\n", reg, val));
   2785 	return val;
   2786 }
   2787 
   2788 void
   2789 ess_clear_mreg_bits(struct ess_softc *sc, u_char reg, u_char mask)
   2790 {
   2791 
   2792 	ess_write_mix_reg(sc, reg, ess_read_mix_reg(sc, reg) & ~mask);
   2793 }
   2794 
   2795 void
   2796 ess_set_mreg_bits(struct ess_softc *sc, u_char reg, u_char mask)
   2797 {
   2798 
   2799 	ess_write_mix_reg(sc, reg, ess_read_mix_reg(sc, reg) | mask);
   2800 }
   2801 
   2802 void
   2803 ess_read_multi_mix_reg(struct ess_softc *sc, u_char reg,
   2804 		       uint8_t *datap, bus_size_t count)
   2805 {
   2806 	bus_space_tag_t iot;
   2807 	bus_space_handle_t ioh;
   2808 
   2809 	iot = sc->sc_iot;
   2810 	ioh = sc->sc_ioh;
   2811 	EWRITE1(iot, ioh, ESS_MIX_REG_SELECT, reg);
   2812 	bus_space_read_multi_1(iot, ioh, ESS_MIX_REG_DATA, datap, count);
   2813 }
   2814