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ess.c revision 1.82.2.1
      1 /*	$NetBSD: ess.c,v 1.82.2.1 2016/10/05 20:55:42 skrll 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 1.82.2.1 2016/10/05 20:55:42 skrll 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 *,
    189     bus_size_t);
    190 
    191 static const char *essmodel[] = {
    192 	"unsupported",
    193 
    194 	"688",
    195 	"1688",
    196 	"1788",
    197 	"1868",
    198 	"1869",
    199 	"1878",
    200 	"1879",
    201 
    202 	"888",
    203 	"1887",
    204 	"1888",
    205 };
    206 
    207 struct audio_device ess_device = {
    208 	"ESS Technology",
    209 	"x",
    210 	"ess"
    211 };
    212 
    213 /*
    214  * Define our interface to the higher level audio driver.
    215  */
    216 
    217 const struct audio_hw_if ess_1788_hw_if = {
    218 	ess_open,
    219 	ess_close,
    220 	ess_drain,
    221 	ess_query_encoding,
    222 	ess_set_params,
    223 	ess_round_blocksize,
    224 	NULL,
    225 	NULL,
    226 	NULL,
    227 	NULL,
    228 	NULL,
    229 	ess_audio1_halt,
    230 	ess_audio1_halt,
    231 	ess_speaker_ctl,
    232 	ess_getdev,
    233 	NULL,
    234 	ess_set_port,
    235 	ess_get_port,
    236 	ess_query_devinfo,
    237 	ess_malloc,
    238 	ess_free,
    239 	ess_round_buffersize,
    240 	ess_mappage,
    241 	ess_1788_get_props,
    242 	ess_audio1_trigger_output,
    243 	ess_audio1_trigger_input,
    244 	NULL,
    245 	ess_get_locks,
    246 };
    247 
    248 const struct audio_hw_if ess_1888_hw_if = {
    249 	ess_open,
    250 	ess_close,
    251 	ess_drain,
    252 	ess_query_encoding,
    253 	ess_set_params,
    254 	ess_round_blocksize,
    255 	NULL,
    256 	NULL,
    257 	NULL,
    258 	NULL,
    259 	NULL,
    260 	ess_audio2_halt,
    261 	ess_audio1_halt,
    262 	ess_speaker_ctl,
    263 	ess_getdev,
    264 	NULL,
    265 	ess_set_port,
    266 	ess_get_port,
    267 	ess_query_devinfo,
    268 	ess_malloc,
    269 	ess_free,
    270 	ess_round_buffersize,
    271 	ess_mappage,
    272 	ess_1888_get_props,
    273 	ess_audio2_trigger_output,
    274 	ess_audio1_trigger_input,
    275 	NULL,
    276 	ess_get_locks,
    277 };
    278 
    279 #define ESS_NFORMATS	8
    280 static const struct audio_format ess_formats[ESS_NFORMATS] = {
    281 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    282 	 2, AUFMT_STEREO, 0, {ESS_MINRATE, ESS_MAXRATE}},
    283 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    284 	 1, AUFMT_MONAURAL, 0, {ESS_MINRATE, ESS_MAXRATE}},
    285 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 16, 16,
    286 	 2, AUFMT_STEREO, 0, {ESS_MINRATE, ESS_MAXRATE}},
    287 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 16, 16,
    288 	 1, AUFMT_MONAURAL, 0, {ESS_MINRATE, ESS_MAXRATE}},
    289 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 8, 8,
    290 	 2, AUFMT_STEREO, 0, {ESS_MINRATE, ESS_MAXRATE}},
    291 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 8, 8,
    292 	 1, AUFMT_MONAURAL, 0, {ESS_MINRATE, ESS_MAXRATE}},
    293 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
    294 	 2, AUFMT_STEREO, 0, {ESS_MINRATE, ESS_MAXRATE}},
    295 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
    296 	 1, AUFMT_MONAURAL, 0, {ESS_MINRATE, ESS_MAXRATE}},
    297 };
    298 
    299 #ifdef AUDIO_DEBUG
    300 void ess_printsc(struct ess_softc *);
    301 void ess_dump_mixer(struct ess_softc *);
    302 
    303 void
    304 ess_printsc(struct ess_softc *sc)
    305 {
    306 	int i;
    307 
    308 	printf("iobase 0x%x outport %u inport %u speaker %s\n",
    309 	       sc->sc_iobase, sc->out_port,
    310 	       sc->in_port, sc->spkr_state ? "on" : "off");
    311 
    312 	printf("audio1: DMA chan %d irq %d nintr %lu intr %p arg %p\n",
    313 	       sc->sc_audio1.drq, sc->sc_audio1.irq, sc->sc_audio1.nintr,
    314 	       sc->sc_audio1.intr, sc->sc_audio1.arg);
    315 
    316 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
    317 		printf("audio2: DMA chan %d irq %d nintr %lu intr %p arg %p\n",
    318 		       sc->sc_audio2.drq, sc->sc_audio2.irq, sc->sc_audio2.nintr,
    319 		       sc->sc_audio2.intr, sc->sc_audio2.arg);
    320 	}
    321 
    322 	printf("gain:");
    323 	for (i = 0; i < sc->ndevs; i++)
    324 		printf(" %u,%u", sc->gain[i][ESS_LEFT], sc->gain[i][ESS_RIGHT]);
    325 	printf("\n");
    326 }
    327 
    328 void
    329 ess_dump_mixer(struct ess_softc *sc)
    330 {
    331 
    332 	printf("ESS_DAC_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    333 	       0x7C, ess_read_mix_reg(sc, 0x7C));
    334 	printf("ESS_MIC_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    335 	       0x1A, ess_read_mix_reg(sc, 0x1A));
    336 	printf("ESS_LINE_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    337 	       0x3E, ess_read_mix_reg(sc, 0x3E));
    338 	printf("ESS_SYNTH_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    339 	       0x36, ess_read_mix_reg(sc, 0x36));
    340 	printf("ESS_CD_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    341 	       0x38, ess_read_mix_reg(sc, 0x38));
    342 	printf("ESS_AUXB_PLAY_VOL: mix reg 0x%02x=0x%02x\n",
    343 	       0x3A, ess_read_mix_reg(sc, 0x3A));
    344 	printf("ESS_MASTER_VOL: mix reg 0x%02x=0x%02x\n",
    345 	       0x32, ess_read_mix_reg(sc, 0x32));
    346 	printf("ESS_PCSPEAKER_VOL: mix reg 0x%02x=0x%02x\n",
    347 	       0x3C, ess_read_mix_reg(sc, 0x3C));
    348 	printf("ESS_DAC_REC_VOL: mix reg 0x%02x=0x%02x\n",
    349 	       0x69, ess_read_mix_reg(sc, 0x69));
    350 	printf("ESS_MIC_REC_VOL: mix reg 0x%02x=0x%02x\n",
    351 	       0x68, ess_read_mix_reg(sc, 0x68));
    352 	printf("ESS_LINE_REC_VOL: mix reg 0x%02x=0x%02x\n",
    353 	       0x6E, ess_read_mix_reg(sc, 0x6E));
    354 	printf("ESS_SYNTH_REC_VOL: mix reg 0x%02x=0x%02x\n",
    355 	       0x6B, ess_read_mix_reg(sc, 0x6B));
    356 	printf("ESS_CD_REC_VOL: mix reg 0x%02x=0x%02x\n",
    357 	       0x6A, ess_read_mix_reg(sc, 0x6A));
    358 	printf("ESS_AUXB_REC_VOL: mix reg 0x%02x=0x%02x\n",
    359 	       0x6C, ess_read_mix_reg(sc, 0x6C));
    360 	printf("ESS_RECORD_VOL: x reg 0x%02x=0x%02x\n",
    361 	       0xB4, ess_read_x_reg(sc, 0xB4));
    362 	printf("Audio 1 play vol (unused): mix reg 0x%02x=0x%02x\n",
    363 	       0x14, ess_read_mix_reg(sc, 0x14));
    364 
    365 	printf("ESS_MIC_PREAMP: x reg 0x%02x=0x%02x\n",
    366 	       ESS_XCMD_PREAMP_CTRL, ess_read_x_reg(sc, ESS_XCMD_PREAMP_CTRL));
    367 	printf("ESS_RECORD_MONITOR: x reg 0x%02x=0x%02x\n",
    368 	       ESS_XCMD_AUDIO_CTRL, ess_read_x_reg(sc, ESS_XCMD_AUDIO_CTRL));
    369 	printf("Record source: mix reg 0x%02x=0x%02x, 0x%02x=0x%02x\n",
    370 	       ESS_MREG_ADC_SOURCE, ess_read_mix_reg(sc, ESS_MREG_ADC_SOURCE),
    371 	       ESS_MREG_AUDIO2_CTRL2, ess_read_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2));
    372 }
    373 
    374 #endif
    375 
    376 /*
    377  * Configure the ESS chip for the desired audio base address.
    378  */
    379 int
    380 ess_config_addr(struct ess_softc *sc)
    381 {
    382 	int iobase;
    383 	bus_space_tag_t iot;
    384 	/*
    385 	 * Configure using the System Control Register method.  This
    386 	 * method is used when the AMODE line is tied high, which is
    387 	 * the case for the Shark, but not for the evaluation board.
    388 	 */
    389 	bus_space_handle_t scr_access_ioh;
    390 	bus_space_handle_t scr_ioh;
    391 	u_short scr_value;
    392 
    393 	iobase = sc->sc_iobase;
    394 	iot = sc->sc_iot;
    395 	/*
    396 	 * Set the SCR bit to enable audio.
    397 	 */
    398 	scr_value = ESS_SCR_AUDIO_ENABLE;
    399 
    400 	/*
    401 	 * Set the SCR bits necessary to select the specified audio
    402 	 * base address.
    403 	 */
    404 	switch(iobase) {
    405 	case 0x220:
    406 		scr_value |= ESS_SCR_AUDIO_220;
    407 		break;
    408 	case 0x230:
    409 		scr_value |= ESS_SCR_AUDIO_230;
    410 		break;
    411 	case 0x240:
    412 		scr_value |= ESS_SCR_AUDIO_240;
    413 		break;
    414 	case 0x250:
    415 		scr_value |= ESS_SCR_AUDIO_250;
    416 		break;
    417 	default:
    418 		printf("ess: configured iobase 0x%x invalid\n", iobase);
    419 		return 1;
    420 		break;
    421 	}
    422 
    423 	/*
    424 	 * Get a mapping for the System Control Register (SCR) access
    425 	 * registers and the SCR data registers.
    426 	 */
    427 	if (bus_space_map(iot, ESS_SCR_ACCESS_BASE, ESS_SCR_ACCESS_PORTS,
    428 			  0, &scr_access_ioh)) {
    429 		printf("ess: can't map SCR access registers\n");
    430 		return 1;
    431 	}
    432 	if (bus_space_map(iot, ESS_SCR_BASE, ESS_SCR_PORTS,
    433 			  0, &scr_ioh)) {
    434 		printf("ess: can't map SCR registers\n");
    435 		bus_space_unmap(iot, scr_access_ioh, ESS_SCR_ACCESS_PORTS);
    436 		return 1;
    437 	}
    438 
    439 	/* Unlock the SCR. */
    440 	EWRITE1(iot, scr_access_ioh, ESS_SCR_UNLOCK, 0);
    441 
    442 	/* Write the base address information into SCR[0]. */
    443 	EWRITE1(iot, scr_ioh, ESS_SCR_INDEX, 0);
    444 	EWRITE1(iot, scr_ioh, ESS_SCR_DATA, scr_value);
    445 
    446 	/* Lock the SCR. */
    447 	EWRITE1(iot, scr_access_ioh, ESS_SCR_LOCK, 0);
    448 
    449 	/* Unmap the SCR access ports and the SCR data ports. */
    450 	bus_space_unmap(iot, scr_access_ioh, ESS_SCR_ACCESS_PORTS);
    451 	bus_space_unmap(iot, scr_ioh, ESS_SCR_PORTS);
    452 
    453 	return 0;
    454 }
    455 
    456 
    457 /*
    458  * Configure the ESS chip for the desired IRQ and DMA channels.
    459  * ESS  ISA
    460  * --------
    461  * IRQA irq9
    462  * IRQB irq5
    463  * IRQC irq7
    464  * IRQD irq10
    465  * IRQE irq15
    466  *
    467  * DRQA drq0
    468  * DRQB drq1
    469  * DRQC drq3
    470  * DRQD drq5
    471  */
    472 void
    473 ess_config_irq(struct ess_softc *sc)
    474 {
    475 	int v;
    476 
    477 	DPRINTFN(2,("ess_config_irq\n"));
    478 
    479 	if (sc->sc_model == ESS_1887 &&
    480 	    sc->sc_audio1.irq == sc->sc_audio2.irq &&
    481 	    sc->sc_audio1.irq != -1) {
    482 		/* Use new method, both interrupts are the same. */
    483 		v = ESS_IS_SELECT_IRQ;	/* enable intrs */
    484 		switch (sc->sc_audio1.irq) {
    485 		case 5:
    486 			v |= ESS_IS_INTRB;
    487 			break;
    488 		case 7:
    489 			v |= ESS_IS_INTRC;
    490 			break;
    491 		case 9:
    492 			v |= ESS_IS_INTRA;
    493 			break;
    494 		case 10:
    495 			v |= ESS_IS_INTRD;
    496 			break;
    497 		case 15:
    498 			v |= ESS_IS_INTRE;
    499 			break;
    500 #ifdef DIAGNOSTIC
    501 		default:
    502 			printf("ess_config_irq: configured irq %d not supported for Audio 1\n",
    503 			       sc->sc_audio1.irq);
    504 			return;
    505 #endif
    506 		}
    507 		/* Set the IRQ */
    508 		ess_write_mix_reg(sc, ESS_MREG_INTR_ST, v);
    509 		return;
    510 	}
    511 
    512 	if (sc->sc_model == ESS_1887) {
    513 		/* Tell the 1887 to use the old interrupt method. */
    514 		ess_write_mix_reg(sc, ESS_MREG_INTR_ST, ESS_IS_ES1888);
    515 	}
    516 
    517 	if (sc->sc_audio1.polled) {
    518 		/* Turn off Audio1 interrupts. */
    519 		v = 0;
    520 	} else {
    521 		/* Configure Audio 1 for the appropriate IRQ line. */
    522 		v = ESS_IRQ_CTRL_MASK | ESS_IRQ_CTRL_EXT; /* All intrs on */
    523 		switch (sc->sc_audio1.irq) {
    524 		case 5:
    525 			v |= ESS_IRQ_CTRL_INTRB;
    526 			break;
    527 		case 7:
    528 			v |= ESS_IRQ_CTRL_INTRC;
    529 			break;
    530 		case 9:
    531 			v |= ESS_IRQ_CTRL_INTRA;
    532 			break;
    533 		case 10:
    534 			v |= ESS_IRQ_CTRL_INTRD;
    535 			break;
    536 #ifdef DIAGNOSTIC
    537 		default:
    538 			printf("ess: configured irq %d not supported for Audio 1\n",
    539 			       sc->sc_audio1.irq);
    540 			return;
    541 #endif
    542 		}
    543 	}
    544 	ess_write_x_reg(sc, ESS_XCMD_IRQ_CTRL, v);
    545 
    546 	if (ESS_USE_AUDIO1(sc->sc_model))
    547 		return;
    548 
    549 	if (sc->sc_audio2.polled) {
    550 		/* Turn off Audio2 interrupts. */
    551 		ess_clear_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2,
    552 				    ESS_AUDIO2_CTRL2_IRQ2_ENABLE);
    553 	} else {
    554 		/* Audio2 is hardwired to INTRE in this mode. */
    555 		ess_set_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2,
    556 				  ESS_AUDIO2_CTRL2_IRQ2_ENABLE);
    557 	}
    558 }
    559 
    560 
    561 void
    562 ess_config_drq(struct ess_softc *sc)
    563 {
    564 	int v;
    565 
    566 	DPRINTFN(2,("ess_config_drq\n"));
    567 
    568 	/* Configure Audio 1 (record) for DMA on the appropriate channel. */
    569 	v = ESS_DRQ_CTRL_PU | ESS_DRQ_CTRL_EXT;
    570 	switch (sc->sc_audio1.drq) {
    571 	case 0:
    572 		v |= ESS_DRQ_CTRL_DRQA;
    573 		break;
    574 	case 1:
    575 		v |= ESS_DRQ_CTRL_DRQB;
    576 		break;
    577 	case 3:
    578 		v |= ESS_DRQ_CTRL_DRQC;
    579 		break;
    580 #ifdef DIAGNOSTIC
    581 	default:
    582 		printf("ess_config_drq: configured DMA chan %d not supported for Audio 1\n",
    583 		       sc->sc_audio1.drq);
    584 		return;
    585 #endif
    586 	}
    587 	/* Set DRQ1 */
    588 	ess_write_x_reg(sc, ESS_XCMD_DRQ_CTRL, v);
    589 
    590 	if (ESS_USE_AUDIO1(sc->sc_model))
    591 		return;
    592 
    593 	/* Configure DRQ2 */
    594 	v = ESS_AUDIO2_CTRL3_DRQ_PD;
    595 	switch (sc->sc_audio2.drq) {
    596 	case 0:
    597 		v |= ESS_AUDIO2_CTRL3_DRQA;
    598 		break;
    599 	case 1:
    600 		v |= ESS_AUDIO2_CTRL3_DRQB;
    601 		break;
    602 	case 3:
    603 		v |= ESS_AUDIO2_CTRL3_DRQC;
    604 		break;
    605 	case 5:
    606 		v |= ESS_AUDIO2_CTRL3_DRQD;
    607 		break;
    608 #ifdef DIAGNOSTIC
    609 	default:
    610 		printf("ess_config_drq: configured DMA chan %d not supported for Audio 2\n",
    611 		       sc->sc_audio2.drq);
    612 		return;
    613 #endif
    614 	}
    615 	ess_write_mix_reg(sc, ESS_MREG_AUDIO2_CTRL3, v);
    616 	/* Enable DMA 2 */
    617 	ess_set_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2,
    618 			  ESS_AUDIO2_CTRL2_DMA_ENABLE);
    619 }
    620 
    621 /*
    622  * Set up registers after a reset.
    623  */
    624 void
    625 ess_setup(struct ess_softc *sc)
    626 {
    627 
    628 	ess_config_irq(sc);
    629 	ess_config_drq(sc);
    630 
    631 	DPRINTFN(2,("ess_setup: done\n"));
    632 }
    633 
    634 /*
    635  * Determine the model of ESS chip we are talking to.  Currently we
    636  * only support ES1888, ES1887 and ES888.  The method of determining
    637  * the chip is based on the information on page 27 of the ES1887 data
    638  * sheet.
    639  *
    640  * This routine sets the values of sc->sc_model and sc->sc_version.
    641  */
    642 int
    643 ess_identify(struct ess_softc *sc)
    644 {
    645 	u_char reg1;
    646 	u_char reg2;
    647 	u_char reg3;
    648 	u_int8_t ident[4];
    649 
    650 	sc->sc_model = ESS_UNSUPPORTED;
    651 	sc->sc_version = 0;
    652 
    653 	memset(ident, 0, sizeof(ident));
    654 
    655 	/*
    656 	 * 1. Check legacy ID bytes.  These should be 0x68 0x8n, where
    657 	 *    n >= 8 for an ES1887 or an ES888.  Other values indicate
    658 	 *    earlier (unsupported) chips.
    659 	 */
    660 	ess_wdsp(sc, ESS_ACMD_LEGACY_ID);
    661 
    662 	if ((reg1 = ess_rdsp(sc)) != 0x68) {
    663 		printf("ess: First ID byte wrong (0x%02x)\n", reg1);
    664 		return 1;
    665 	}
    666 
    667 	reg2 = ess_rdsp(sc);
    668 	if (((reg2 & 0xf0) != 0x80) ||
    669 	    ((reg2 & 0x0f) < 8)) {
    670 		sc->sc_model = ESS_688;
    671 		return 0;
    672 	}
    673 
    674 	/*
    675 	 * Store the ID bytes as the version.
    676 	 */
    677 	sc->sc_version = (reg1 << 8) + reg2;
    678 
    679 
    680 	/*
    681 	 * 2. Verify we can change bit 2 in mixer register 0x64.  This
    682 	 *    should be possible on all supported chips.
    683 	 */
    684 	reg1 = ess_read_mix_reg(sc, ESS_MREG_VOLUME_CTRL);
    685 	reg2 = reg1 ^ 0x04;  /* toggle bit 2 */
    686 
    687 	ess_write_mix_reg(sc, ESS_MREG_VOLUME_CTRL, reg2);
    688 
    689 	if (ess_read_mix_reg(sc, ESS_MREG_VOLUME_CTRL) != reg2) {
    690 		switch (sc->sc_version) {
    691 		case 0x688b:
    692 			sc->sc_model = ESS_1688;
    693 			break;
    694 		default:
    695 			printf("ess: Hardware error (unable to toggle bit 2 of mixer register 0x64)\n");
    696 			return 1;
    697 		}
    698 		return 0;
    699 	}
    700 
    701 	/*
    702 	 * Restore the original value of mixer register 0x64.
    703 	 */
    704 	ess_write_mix_reg(sc, ESS_MREG_VOLUME_CTRL, reg1);
    705 
    706 
    707 	/*
    708 	 * 3. Verify we can change the value of mixer register
    709 	 *    ESS_MREG_SAMPLE_RATE.
    710 	 *    This is possible on the 1888/1887/888, but not on the 1788.
    711 	 *    It is not necessary to restore the value of this mixer register.
    712 	 */
    713 	reg1 = ess_read_mix_reg(sc, ESS_MREG_SAMPLE_RATE);
    714 	reg2 = reg1 ^ 0xff;  /* toggle all bits */
    715 
    716 	ess_write_mix_reg(sc, ESS_MREG_SAMPLE_RATE, reg2);
    717 
    718 	if (ess_read_mix_reg(sc, ESS_MREG_SAMPLE_RATE) != reg2) {
    719 		/* If we got this far before failing, it's a 1788. */
    720 		sc->sc_model = ESS_1788;
    721 
    722 		/*
    723 		 * Identify ESS model for ES18[67]8.
    724 		 */
    725 		ess_read_multi_mix_reg(sc, 0x40, ident, sizeof(ident));
    726 		if(ident[0] == 0x18) {
    727 			switch(ident[1]) {
    728 			case 0x68:
    729 				sc->sc_model = ESS_1868;
    730 				break;
    731 			case 0x78:
    732 				sc->sc_model = ESS_1878;
    733 				break;
    734 			}
    735 		}
    736 
    737 		return 0;
    738 	}
    739 
    740 	/*
    741 	 * 4. Determine if we can change bit 5 in mixer register 0x64.
    742 	 *    This determines whether we have an ES1887:
    743 	 *
    744 	 *    - can change indicates ES1887
    745 	 *    - can't change indicates ES1888 or ES888
    746 	 */
    747 	reg1 = ess_read_mix_reg(sc, ESS_MREG_VOLUME_CTRL);
    748 	reg2 = reg1 ^ 0x20;  /* toggle bit 5 */
    749 
    750 	ess_write_mix_reg(sc, ESS_MREG_VOLUME_CTRL, reg2);
    751 
    752 	if (ess_read_mix_reg(sc, ESS_MREG_VOLUME_CTRL) == reg2) {
    753 		sc->sc_model = ESS_1887;
    754 
    755 		/*
    756 		 * Restore the original value of mixer register 0x64.
    757 		 */
    758 		ess_write_mix_reg(sc, ESS_MREG_VOLUME_CTRL, reg1);
    759 
    760 		/*
    761 		 * Identify ESS model for ES18[67]9.
    762 		 */
    763 		ess_read_multi_mix_reg(sc, 0x40, ident, sizeof(ident));
    764 		if(ident[0] == 0x18) {
    765 			switch(ident[1]) {
    766 			case 0x69:
    767 				sc->sc_model = ESS_1869;
    768 				break;
    769 			case 0x79:
    770 				sc->sc_model = ESS_1879;
    771 				break;
    772 			}
    773 		}
    774 
    775 		return 0;
    776 	}
    777 
    778 	/*
    779 	 * 5. Determine if we can change the value of mixer
    780 	 *    register 0x69 independently of mixer register
    781 	 *    0x68. This determines which chip we have:
    782 	 *
    783 	 *    - can modify idependently indicates ES888
    784 	 *    - register 0x69 is an alias of 0x68 indicates ES1888
    785 	 */
    786 	reg1 = ess_read_mix_reg(sc, 0x68);
    787 	reg2 = ess_read_mix_reg(sc, 0x69);
    788 	reg3 = reg2 ^ 0xff;  /* toggle all bits */
    789 
    790 	/*
    791 	 * Write different values to each register.
    792 	 */
    793 	ess_write_mix_reg(sc, 0x68, reg2);
    794 	ess_write_mix_reg(sc, 0x69, reg3);
    795 
    796 	if (ess_read_mix_reg(sc, 0x68) == reg2 &&
    797 	    ess_read_mix_reg(sc, 0x69) == reg3)
    798 		sc->sc_model = ESS_888;
    799 	else
    800 		sc->sc_model = ESS_1888;
    801 
    802 	/*
    803 	 * Restore the original value of the registers.
    804 	 */
    805 	ess_write_mix_reg(sc, 0x68, reg1);
    806 	ess_write_mix_reg(sc, 0x69, reg2);
    807 
    808 	return 0;
    809 }
    810 
    811 
    812 int
    813 ess_setup_sc(struct ess_softc *sc, int doinit)
    814 {
    815 
    816 	/* Reset the chip. */
    817 	if (ess_reset(sc) != 0) {
    818 		DPRINTF(("ess_setup_sc: couldn't reset chip\n"));
    819 		return 1;
    820 	}
    821 
    822 	/* Identify the ESS chip, and check that it is supported. */
    823 	if (ess_identify(sc)) {
    824 		DPRINTF(("ess_setup_sc: couldn't identify\n"));
    825 		return 1;
    826 	}
    827 
    828 	return 0;
    829 }
    830 
    831 /*
    832  * Probe for the ESS hardware.
    833  */
    834 int
    835 essmatch(struct ess_softc *sc)
    836 {
    837 	if (!ESS_BASE_VALID(sc->sc_iobase)) {
    838 		printf("ess: configured iobase 0x%x invalid\n", sc->sc_iobase);
    839 		return 0;
    840 	}
    841 
    842 	if (ess_setup_sc(sc, 1))
    843 		return 0;
    844 
    845 	if (sc->sc_model == ESS_UNSUPPORTED) {
    846 		DPRINTF(("ess: Unsupported model\n"));
    847 		return 0;
    848 	}
    849 
    850 	/* Check that requested DMA channels are valid and different. */
    851 	if (!ESS_DRQ1_VALID(sc->sc_audio1.drq)) {
    852 		printf("ess: record drq %d invalid\n", sc->sc_audio1.drq);
    853 		return 0;
    854 	}
    855 	if (!isa_drq_isfree(sc->sc_ic, sc->sc_audio1.drq))
    856 		return 0;
    857 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
    858 		if (!ESS_DRQ2_VALID(sc->sc_audio2.drq)) {
    859 			printf("ess: play drq %d invalid\n", sc->sc_audio2.drq);
    860 			return 0;
    861 		}
    862 		if (sc->sc_audio1.drq == sc->sc_audio2.drq) {
    863 			printf("ess: play and record drq both %d\n",
    864 			       sc->sc_audio1.drq);
    865 			return 0;
    866 		}
    867 		if (!isa_drq_isfree(sc->sc_ic, sc->sc_audio2.drq))
    868 			return 0;
    869 	}
    870 
    871 	/*
    872 	 * The 1887 has an additional IRQ mode where both channels are mapped
    873 	 * to the same IRQ.
    874 	 */
    875 	if (sc->sc_model == ESS_1887 &&
    876 	    sc->sc_audio1.irq == sc->sc_audio2.irq &&
    877 	    sc->sc_audio1.irq != -1 &&
    878 	    ESS_IRQ12_VALID(sc->sc_audio1.irq))
    879 		goto irq_not1888;
    880 
    881 	/* Check that requested IRQ lines are valid and different. */
    882 	if (sc->sc_audio1.irq != -1 &&
    883 	    !ESS_IRQ1_VALID(sc->sc_audio1.irq)) {
    884 		printf("ess: record irq %d invalid\n", sc->sc_audio1.irq);
    885 		return 0;
    886 	}
    887 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
    888 		if (sc->sc_audio2.irq != -1 &&
    889 		    !ESS_IRQ2_VALID(sc->sc_audio2.irq)) {
    890 			printf("ess: play irq %d invalid\n", sc->sc_audio2.irq);
    891 			return 0;
    892 		}
    893 		if (sc->sc_audio1.irq == sc->sc_audio2.irq &&
    894 		    sc->sc_audio1.irq != -1) {
    895 			printf("ess: play and record irq both %d\n",
    896 			       sc->sc_audio1.irq);
    897 			return 0;
    898 		}
    899 	}
    900 
    901 irq_not1888:
    902 	/* XXX should we check IRQs as well? */
    903 
    904 	return 2; /* beat "sb" */
    905 }
    906 
    907 
    908 /*
    909  * Attach hardware to driver, attach hardware driver to audio
    910  * pseudo-device driver.
    911  */
    912 void
    913 essattach(struct ess_softc *sc, int enablejoy)
    914 {
    915 	struct audio_attach_args arg;
    916 	int i;
    917 	u_int v;
    918 
    919 	if (ess_setup_sc(sc, 0)) {
    920 		aprint_error(": setup failed\n");
    921 		return;
    922 	}
    923 
    924 	aprint_normal("ESS Technology ES%s [version 0x%04x]\n",
    925 	    essmodel[sc->sc_model], sc->sc_version);
    926 
    927 	callout_init(&sc->sc_poll1_ch, CALLOUT_MPSAFE);
    928 	callout_init(&sc->sc_poll2_ch, CALLOUT_MPSAFE);
    929 	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
    930 	mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_AUDIO);
    931 
    932 	sc->sc_audio1.polled = sc->sc_audio1.irq == -1;
    933 	if (!sc->sc_audio1.polled) {
    934 		sc->sc_audio1.ih = isa_intr_establish(sc->sc_ic,
    935 		    sc->sc_audio1.irq, sc->sc_audio1.ist, IPL_AUDIO,
    936 		    ess_audio1_intr, sc);
    937 		aprint_normal_dev(sc->sc_dev,
    938 		    "audio1 interrupting at irq %d\n", sc->sc_audio1.irq);
    939 	} else
    940 		aprint_normal_dev(sc->sc_dev, "audio1 polled\n");
    941 	sc->sc_audio1.maxsize = isa_dmamaxsize(sc->sc_ic, sc->sc_audio1.drq);
    942 
    943 	if (isa_drq_alloc(sc->sc_ic, sc->sc_audio1.drq) != 0) {
    944 		aprint_error_dev(sc->sc_dev, "can't reserve drq %d\n",
    945 		    sc->sc_audio1.drq);
    946 		goto fail;
    947 	}
    948 
    949 	if (isa_dmamap_create(sc->sc_ic, sc->sc_audio1.drq,
    950 	    sc->sc_audio1.maxsize, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
    951 		aprint_error_dev(sc->sc_dev, "can't create map for drq %d\n",
    952 		    sc->sc_audio1.drq);
    953 		goto fail;
    954 	}
    955 
    956 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
    957 		sc->sc_audio2.polled = sc->sc_audio2.irq == -1;
    958 		if (!sc->sc_audio2.polled) {
    959 			sc->sc_audio2.ih = isa_intr_establish(sc->sc_ic,
    960 			    sc->sc_audio2.irq, sc->sc_audio2.ist, IPL_AUDIO,
    961 			    ess_audio2_intr, sc);
    962 			aprint_normal_dev(sc->sc_dev,
    963 			    "audio2 interrupting at irq %d\n",
    964 			    sc->sc_audio2.irq);
    965 		} else
    966 			aprint_normal_dev(sc->sc_dev, "audio2 polled\n");
    967 		sc->sc_audio2.maxsize = isa_dmamaxsize(sc->sc_ic,
    968 		    sc->sc_audio2.drq);
    969 
    970 		if (isa_drq_alloc(sc->sc_ic, sc->sc_audio2.drq) != 0) {
    971 			aprint_error_dev(sc->sc_dev, "can't reserve drq %d\n",
    972 			    sc->sc_audio2.drq);
    973 			goto fail;
    974 		}
    975 
    976 		if (isa_dmamap_create(sc->sc_ic, sc->sc_audio2.drq,
    977 		    sc->sc_audio2.maxsize, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
    978 			aprint_error_dev(sc->sc_dev,
    979 			    "can't create map for drq %d\n",
    980 			    sc->sc_audio2.drq);
    981 			goto fail;
    982 		}
    983 	}
    984 
    985 	/* Do a hardware reset on the mixer. */
    986 	ess_write_mix_reg(sc, ESS_MIX_RESET, ESS_MIX_RESET);
    987 
    988 	/*
    989 	 * Set volume of Audio 1 to zero and disable Audio 1 DAC input
    990 	 * to playback mixer, since playback is always through Audio 2.
    991 	 */
    992 	if (!ESS_USE_AUDIO1(sc->sc_model))
    993 		ess_write_mix_reg(sc, ESS_MREG_VOLUME_VOICE, 0);
    994 	ess_wdsp(sc, ESS_ACMD_DISABLE_SPKR);
    995 
    996 	if (ESS_USE_AUDIO1(sc->sc_model)) {
    997 		ess_write_mix_reg(sc, ESS_MREG_ADC_SOURCE, ESS_SOURCE_MIC);
    998 		sc->in_port = ESS_SOURCE_MIC;
    999 		if (ESS_IS_ES18X9(sc->sc_model)) {
   1000 			sc->ndevs = ESS_18X9_NDEVS;
   1001 			sc->sc_spatializer = 0;
   1002 			ess_set_mreg_bits(sc, ESS_MREG_MODE,
   1003 			    ESS_MODE_ASYNC_MODE | ESS_MODE_NEWREG);
   1004 			ess_set_mreg_bits(sc, ESS_MREG_SPATIAL_CTRL,
   1005 			    ESS_SPATIAL_CTRL_RESET);
   1006 			ess_clear_mreg_bits(sc, ESS_MREG_SPATIAL_CTRL,
   1007 			    ESS_SPATIAL_CTRL_ENABLE | ESS_SPATIAL_CTRL_MONO);
   1008 		} else
   1009 			sc->ndevs = ESS_1788_NDEVS;
   1010 	} else {
   1011 		/*
   1012 		 * Set hardware record source to use output of the record
   1013 		 * mixer. We do the selection of record source in software by
   1014 		 * setting the gain of the unused sources to zero. (See
   1015 		 * ess_set_in_ports.)
   1016 		 */
   1017 		ess_write_mix_reg(sc, ESS_MREG_ADC_SOURCE, ESS_SOURCE_MIXER);
   1018 		sc->in_mask = 1 << ESS_MIC_REC_VOL;
   1019 		sc->ndevs = ESS_1888_NDEVS;
   1020 		ess_clear_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2, 0x10);
   1021 		ess_set_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL2, 0x08);
   1022 	}
   1023 
   1024 	/*
   1025 	 * Set gain on each mixer device to a sensible value.
   1026 	 * Devices not normally used are turned off, and other devices
   1027 	 * are set to 50% volume.
   1028 	 */
   1029 	for (i = 0; i < sc->ndevs; i++) {
   1030 		if (ESS_IS_ES18X9(sc->sc_model)) {
   1031 			switch (i) {
   1032 			case ESS_SPATIALIZER:
   1033 			case ESS_SPATIALIZER_ENABLE:
   1034 				v = 0;
   1035 				goto skip;
   1036 			}
   1037 		}
   1038 		switch (i) {
   1039 		case ESS_MIC_PLAY_VOL:
   1040 		case ESS_LINE_PLAY_VOL:
   1041 		case ESS_CD_PLAY_VOL:
   1042 		case ESS_AUXB_PLAY_VOL:
   1043 		case ESS_DAC_REC_VOL:
   1044 		case ESS_LINE_REC_VOL:
   1045 		case ESS_SYNTH_REC_VOL:
   1046 		case ESS_CD_REC_VOL:
   1047 		case ESS_AUXB_REC_VOL:
   1048 			v = 0;
   1049 			break;
   1050 		default:
   1051 			v = ESS_4BIT_GAIN(AUDIO_MAX_GAIN / 2);
   1052 			break;
   1053 		}
   1054 skip:
   1055 		sc->gain[i][ESS_LEFT] = sc->gain[i][ESS_RIGHT] = v;
   1056 		ess_set_gain(sc, i, 1);
   1057 	}
   1058 
   1059 	ess_setup(sc);
   1060 
   1061 	/* Disable the speaker until the device is opened.  */
   1062 	ess_speaker_off(sc);
   1063 	sc->spkr_state = SPKR_OFF;
   1064 
   1065 	snprintf(ess_device.name, sizeof(ess_device.name), "ES%s",
   1066 	    essmodel[sc->sc_model]);
   1067 	snprintf(ess_device.version, sizeof(ess_device.version), "0x%04x",
   1068 	    sc->sc_version);
   1069 
   1070 	if (ESS_USE_AUDIO1(sc->sc_model))
   1071 		audio_attach_mi(&ess_1788_hw_if, sc, sc->sc_dev);
   1072 	else
   1073 		audio_attach_mi(&ess_1888_hw_if, sc, sc->sc_dev);
   1074 
   1075 	arg.type = AUDIODEV_TYPE_OPL;
   1076 	arg.hwif = 0;
   1077 	arg.hdl = 0;
   1078 	(void)config_found(sc->sc_dev, &arg, audioprint);
   1079 
   1080 #if NJOY_ESS > 0
   1081 	if (sc->sc_model == ESS_1888 && enablejoy) {
   1082 		unsigned char m40;
   1083 
   1084 		m40 = ess_read_mix_reg(sc, 0x40);
   1085 		m40 |= 2;
   1086 		ess_write_mix_reg(sc, 0x40, m40);
   1087 
   1088 		arg.type = AUDIODEV_TYPE_AUX;
   1089 		(void)config_found(sc->sc_dev, &arg, audioprint);
   1090 	}
   1091 #endif
   1092 
   1093 #ifdef AUDIO_DEBUG
   1094 	if (essdebug > 0)
   1095 		ess_printsc(sc);
   1096 #endif
   1097 
   1098 	return;
   1099 
   1100  fail:
   1101 	callout_destroy(&sc->sc_poll1_ch);
   1102 	callout_destroy(&sc->sc_poll2_ch);
   1103 	mutex_destroy(&sc->sc_lock);
   1104 	mutex_destroy(&sc->sc_intr_lock);
   1105 }
   1106 
   1107 /*
   1108  * Various routines to interface to higher level audio driver
   1109  */
   1110 
   1111 int
   1112 ess_open(void *addr, int flags)
   1113 {
   1114 
   1115 	return 0;
   1116 }
   1117 
   1118 void
   1119 ess_close(void *addr)
   1120 {
   1121 	struct ess_softc *sc;
   1122 
   1123 	sc = addr;
   1124 	DPRINTF(("ess_close: sc=%p\n", sc));
   1125 
   1126 	ess_speaker_off(sc);
   1127 	sc->spkr_state = SPKR_OFF;
   1128 
   1129 	DPRINTF(("ess_close: closed\n"));
   1130 }
   1131 
   1132 /*
   1133  * Wait for FIFO to drain, and analog section to settle.
   1134  * XXX should check FIFO empty bit.
   1135  */
   1136 int
   1137 ess_drain(void *addr)
   1138 {
   1139 	struct ess_softc *sc;
   1140 
   1141 	sc = addr;
   1142 	mutex_exit(&sc->sc_lock);
   1143 	kpause("essdr", FALSE, hz/20, &sc->sc_intr_lock); /* XXX */
   1144 	if (!mutex_tryenter(&sc->sc_lock)) {
   1145 		mutex_spin_exit(&sc->sc_intr_lock);
   1146 		mutex_enter(&sc->sc_lock);
   1147 		mutex_spin_enter(&sc->sc_intr_lock);
   1148 	}
   1149 
   1150 	return 0;
   1151 }
   1152 
   1153 /* XXX should use reference count */
   1154 int
   1155 ess_speaker_ctl(void *addr, int newstate)
   1156 {
   1157 	struct ess_softc *sc;
   1158 
   1159 	sc = addr;
   1160 	if ((newstate == SPKR_ON) && (sc->spkr_state == SPKR_OFF)) {
   1161 		ess_speaker_on(sc);
   1162 		sc->spkr_state = SPKR_ON;
   1163 	}
   1164 	if ((newstate == SPKR_OFF) && (sc->spkr_state == SPKR_ON)) {
   1165 		ess_speaker_off(sc);
   1166 		sc->spkr_state = SPKR_OFF;
   1167 	}
   1168 	return 0;
   1169 }
   1170 
   1171 int
   1172 ess_getdev(void *addr, struct audio_device *retp)
   1173 {
   1174 
   1175 	*retp = ess_device;
   1176 	return 0;
   1177 }
   1178 
   1179 int
   1180 ess_query_encoding(void *addr, struct audio_encoding *fp)
   1181 {
   1182 	/*struct ess_softc *sc = addr;*/
   1183 
   1184 	switch (fp->index) {
   1185 	case 0:
   1186 		strcpy(fp->name, AudioEulinear);
   1187 		fp->encoding = AUDIO_ENCODING_ULINEAR;
   1188 		fp->precision = 8;
   1189 		fp->flags = 0;
   1190 		return 0;
   1191 	case 1:
   1192 		strcpy(fp->name, AudioEmulaw);
   1193 		fp->encoding = AUDIO_ENCODING_ULAW;
   1194 		fp->precision = 8;
   1195 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
   1196 		return 0;
   1197 	case 2:
   1198 		strcpy(fp->name, AudioEalaw);
   1199 		fp->encoding = AUDIO_ENCODING_ALAW;
   1200 		fp->precision = 8;
   1201 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
   1202 		return 0;
   1203 	case 3:
   1204 		strcpy(fp->name, AudioEslinear);
   1205 		fp->encoding = AUDIO_ENCODING_SLINEAR;
   1206 		fp->precision = 8;
   1207 		fp->flags = 0;
   1208 		return 0;
   1209 	case 4:
   1210 		strcpy(fp->name, AudioEslinear_le);
   1211 		fp->encoding = AUDIO_ENCODING_SLINEAR_LE;
   1212 		fp->precision = 16;
   1213 		fp->flags = 0;
   1214 		return 0;
   1215 	case 5:
   1216 		strcpy(fp->name, AudioEulinear_le);
   1217 		fp->encoding = AUDIO_ENCODING_ULINEAR_LE;
   1218 		fp->precision = 16;
   1219 		fp->flags = 0;
   1220 		return 0;
   1221 	case 6:
   1222 		strcpy(fp->name, AudioEslinear_be);
   1223 		fp->encoding = AUDIO_ENCODING_SLINEAR_BE;
   1224 		fp->precision = 16;
   1225 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
   1226 		return 0;
   1227 	case 7:
   1228 		strcpy(fp->name, AudioEulinear_be);
   1229 		fp->encoding = AUDIO_ENCODING_ULINEAR_BE;
   1230 		fp->precision = 16;
   1231 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
   1232 		return 0;
   1233 	default:
   1234 		return EINVAL;
   1235 	}
   1236 	return 0;
   1237 }
   1238 
   1239 int
   1240 ess_set_params(
   1241 	void *addr,
   1242 	int setmode, int usemode,
   1243 	audio_params_t *play, audio_params_t *rec,
   1244 	stream_filter_list_t *pfil, stream_filter_list_t *rfil)
   1245 {
   1246 	struct ess_softc *sc;
   1247 	int rate;
   1248 
   1249 	DPRINTF(("ess_set_params: set=%d use=%d\n", setmode, usemode));
   1250 	sc = addr;
   1251 	/*
   1252 	 * The ES1887 manual (page 39, `Full-Duplex DMA Mode') claims that in
   1253 	 * full-duplex operation the sample rates must be the same for both
   1254 	 * channels.  This appears to be false; the only bit in common is the
   1255 	 * clock source selection.  However, we'll be conservative here.
   1256 	 * - mycroft
   1257 	 */
   1258 	if (play->sample_rate != rec->sample_rate &&
   1259 	    usemode == (AUMODE_PLAY | AUMODE_RECORD)) {
   1260 		if (setmode == AUMODE_PLAY) {
   1261 			rec->sample_rate = play->sample_rate;
   1262 			setmode |= AUMODE_RECORD;
   1263 		} else if (setmode == AUMODE_RECORD) {
   1264 			play->sample_rate = rec->sample_rate;
   1265 			setmode |= AUMODE_PLAY;
   1266 		} else
   1267 			return EINVAL;
   1268 	}
   1269 
   1270 	if (setmode & AUMODE_RECORD) {
   1271 		if (auconv_set_converter(ess_formats, ESS_NFORMATS,
   1272 					 AUMODE_RECORD, rec, FALSE, rfil) < 0)
   1273 			return EINVAL;
   1274 	}
   1275 	if (setmode & AUMODE_PLAY) {
   1276 		if (auconv_set_converter(ess_formats, ESS_NFORMATS,
   1277 					 AUMODE_PLAY, play, FALSE, pfil) < 0)
   1278 			return EINVAL;
   1279 	}
   1280 
   1281 	if (usemode == AUMODE_RECORD)
   1282 		rate = rec->sample_rate;
   1283 	else
   1284 		rate = play->sample_rate;
   1285 
   1286 	ess_write_x_reg(sc, ESS_XCMD_SAMPLE_RATE, ess_srtotc(sc, rate));
   1287 	ess_write_x_reg(sc, ESS_XCMD_FILTER_CLOCK, ess_srtofc(rate));
   1288 
   1289 	if (!ESS_USE_AUDIO1(sc->sc_model)) {
   1290 		ess_write_mix_reg(sc, ESS_MREG_SAMPLE_RATE,
   1291 		    ess_srtotc(sc, rate));
   1292 		ess_write_mix_reg(sc, ESS_MREG_FILTER_CLOCK, ess_srtofc(rate));
   1293 	}
   1294 
   1295 	return 0;
   1296 }
   1297 
   1298 int
   1299 ess_audio1_trigger_output(
   1300 	void *addr,
   1301 	void *start, void *end,
   1302 	int blksize,
   1303 	void (*intr)(void *),
   1304 	void *arg,
   1305 	const audio_params_t *param)
   1306 {
   1307 	struct ess_softc *sc;
   1308 	u_int8_t reg;
   1309 
   1310 	sc = addr;
   1311 	DPRINTFN(1, ("ess_audio1_trigger_output: sc=%p start=%p end=%p "
   1312 	    "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg));
   1313 
   1314 	if (sc->sc_audio1.active)
   1315 		panic("ess_audio1_trigger_output: already running");
   1316 
   1317 	sc->sc_audio1.active = 1;
   1318 	sc->sc_audio1.intr = intr;
   1319 	sc->sc_audio1.arg = arg;
   1320 	if (sc->sc_audio1.polled) {
   1321 		sc->sc_audio1.dmapos = 0;
   1322 		sc->sc_audio1.buffersize = (char *)end - (char *)start;
   1323 		sc->sc_audio1.dmacount = 0;
   1324 		sc->sc_audio1.blksize = blksize;
   1325 		callout_reset(&sc->sc_poll1_ch, hz / 30,
   1326 		    ess_audio1_poll, sc);
   1327 	}
   1328 
   1329 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO_CTRL);
   1330 	if (param->channels == 2) {
   1331 		reg &= ~ESS_AUDIO_CTRL_MONO;
   1332 		reg |= ESS_AUDIO_CTRL_STEREO;
   1333 	} else {
   1334 		reg |= ESS_AUDIO_CTRL_MONO;
   1335 		reg &= ~ESS_AUDIO_CTRL_STEREO;
   1336 	}
   1337 	ess_write_x_reg(sc, ESS_XCMD_AUDIO_CTRL, reg);
   1338 
   1339 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO1_CTRL1);
   1340 	if (param->precision == 16)
   1341 		reg |= ESS_AUDIO1_CTRL1_FIFO_SIZE;
   1342 	else
   1343 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_SIZE;
   1344 	if (param->channels == 2)
   1345 		reg |= ESS_AUDIO1_CTRL1_FIFO_STEREO;
   1346 	else
   1347 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_STEREO;
   1348 	if (param->encoding == AUDIO_ENCODING_SLINEAR_BE ||
   1349 	    param->encoding == AUDIO_ENCODING_SLINEAR_LE)
   1350 		reg |= ESS_AUDIO1_CTRL1_FIFO_SIGNED;
   1351 	else
   1352 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_SIGNED;
   1353 	reg |= ESS_AUDIO1_CTRL1_FIFO_CONNECT;
   1354 	ess_write_x_reg(sc, ESS_XCMD_AUDIO1_CTRL1, reg);
   1355 
   1356 	isa_dmastart(sc->sc_ic, sc->sc_audio1.drq, start,
   1357 		     (char *)end - (char *)start, NULL,
   1358 	    DMAMODE_WRITE | DMAMODE_LOOPDEMAND, BUS_DMA_NOWAIT);
   1359 
   1360 	/* Program transfer count registers with 2's complement of count. */
   1361 	blksize = -blksize;
   1362 	ess_write_x_reg(sc, ESS_XCMD_XFER_COUNTLO, blksize);
   1363 	ess_write_x_reg(sc, ESS_XCMD_XFER_COUNTHI, blksize >> 8);
   1364 
   1365 	/* Use 4 bytes per output DMA. */
   1366 	ess_set_xreg_bits(sc, ESS_XCMD_DEMAND_CTRL, ESS_DEMAND_CTRL_DEMAND_4);
   1367 
   1368 	/* Start auto-init DMA */
   1369 	ess_wdsp(sc, ESS_ACMD_ENABLE_SPKR);
   1370 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO1_CTRL2);
   1371 	reg &= ~(ESS_AUDIO1_CTRL2_DMA_READ | ESS_AUDIO1_CTRL2_ADC_ENABLE);
   1372 	reg |= ESS_AUDIO1_CTRL2_FIFO_ENABLE | ESS_AUDIO1_CTRL2_AUTO_INIT;
   1373 	ess_write_x_reg(sc, ESS_XCMD_AUDIO1_CTRL2, reg);
   1374 
   1375 	return 0;
   1376 }
   1377 
   1378 int
   1379 ess_audio2_trigger_output(
   1380 	void *addr,
   1381 	void *start, void *end,
   1382 	int blksize,
   1383 	void (*intr)(void *),
   1384 	void *arg,
   1385 	const audio_params_t *param)
   1386 {
   1387 	struct ess_softc *sc;
   1388 	u_int8_t reg;
   1389 
   1390 	sc = addr;
   1391 	DPRINTFN(1, ("ess_audio2_trigger_output: sc=%p start=%p end=%p "
   1392 	    "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg));
   1393 
   1394 	if (sc->sc_audio2.active)
   1395 		panic("ess_audio2_trigger_output: already running");
   1396 
   1397 	sc->sc_audio2.active = 1;
   1398 	sc->sc_audio2.intr = intr;
   1399 	sc->sc_audio2.arg = arg;
   1400 	if (sc->sc_audio2.polled) {
   1401 		sc->sc_audio2.dmapos = 0;
   1402 		sc->sc_audio2.buffersize = (char *)end - (char *)start;
   1403 		sc->sc_audio2.dmacount = 0;
   1404 		sc->sc_audio2.blksize = blksize;
   1405 		callout_reset(&sc->sc_poll2_ch, hz / 30,
   1406 		    ess_audio2_poll, sc);
   1407 	}
   1408 
   1409 	reg = ess_read_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2);
   1410 	if (param->precision == 16)
   1411 		reg |= ESS_AUDIO2_CTRL2_FIFO_SIZE;
   1412 	else
   1413 		reg &= ~ESS_AUDIO2_CTRL2_FIFO_SIZE;
   1414 	if (param->channels == 2)
   1415 		reg |= ESS_AUDIO2_CTRL2_CHANNELS;
   1416 	else
   1417 		reg &= ~ESS_AUDIO2_CTRL2_CHANNELS;
   1418 	if (param->encoding == AUDIO_ENCODING_SLINEAR_BE ||
   1419 	    param->encoding == AUDIO_ENCODING_SLINEAR_LE)
   1420 		reg |= ESS_AUDIO2_CTRL2_FIFO_SIGNED;
   1421 	else
   1422 		reg &= ~ESS_AUDIO2_CTRL2_FIFO_SIGNED;
   1423 	ess_write_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2, reg);
   1424 
   1425 	isa_dmastart(sc->sc_ic, sc->sc_audio2.drq, start,
   1426 		     (char *)end - (char *)start, NULL,
   1427 	    DMAMODE_WRITE | DMAMODE_LOOPDEMAND, BUS_DMA_NOWAIT);
   1428 
   1429 	if (IS16BITDRQ(sc->sc_audio2.drq))
   1430 		blksize >>= 1;	/* use word count for 16 bit DMA */
   1431 	/* Program transfer count registers with 2's complement of count. */
   1432 	blksize = -blksize;
   1433 	ess_write_mix_reg(sc, ESS_MREG_XFER_COUNTLO, blksize);
   1434 	ess_write_mix_reg(sc, ESS_MREG_XFER_COUNTHI, blksize >> 8);
   1435 
   1436 	reg = ess_read_mix_reg(sc, ESS_MREG_AUDIO2_CTRL1);
   1437 	if (IS16BITDRQ(sc->sc_audio2.drq))
   1438 		reg |= ESS_AUDIO2_CTRL1_XFER_SIZE;
   1439 	else
   1440 		reg &= ~ESS_AUDIO2_CTRL1_XFER_SIZE;
   1441 	reg |= ESS_AUDIO2_CTRL1_DEMAND_8;
   1442 	reg |= ESS_AUDIO2_CTRL1_DAC_ENABLE | ESS_AUDIO2_CTRL1_FIFO_ENABLE |
   1443 	       ESS_AUDIO2_CTRL1_AUTO_INIT;
   1444 	ess_write_mix_reg(sc, ESS_MREG_AUDIO2_CTRL1, reg);
   1445 
   1446 	return (0);
   1447 }
   1448 
   1449 int
   1450 ess_audio1_trigger_input(
   1451 	void *addr,
   1452 	void *start, void *end,
   1453 	int blksize,
   1454 	void (*intr)(void *),
   1455 	void *arg,
   1456 	const audio_params_t *param)
   1457 {
   1458 	struct ess_softc *sc;
   1459 	u_int8_t reg;
   1460 
   1461 	sc = addr;
   1462 	DPRINTFN(1, ("ess_audio1_trigger_input: sc=%p start=%p end=%p "
   1463 	    "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg));
   1464 
   1465 	if (sc->sc_audio1.active)
   1466 		panic("ess_audio1_trigger_input: already running");
   1467 
   1468 	sc->sc_audio1.active = 1;
   1469 	sc->sc_audio1.intr = intr;
   1470 	sc->sc_audio1.arg = arg;
   1471 	if (sc->sc_audio1.polled) {
   1472 		sc->sc_audio1.dmapos = 0;
   1473 		sc->sc_audio1.buffersize = (char *)end - (char *)start;
   1474 		sc->sc_audio1.dmacount = 0;
   1475 		sc->sc_audio1.blksize = blksize;
   1476 		callout_reset(&sc->sc_poll1_ch, hz / 30,
   1477 		    ess_audio1_poll, sc);
   1478 	}
   1479 
   1480 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO_CTRL);
   1481 	if (param->channels == 2) {
   1482 		reg &= ~ESS_AUDIO_CTRL_MONO;
   1483 		reg |= ESS_AUDIO_CTRL_STEREO;
   1484 	} else {
   1485 		reg |= ESS_AUDIO_CTRL_MONO;
   1486 		reg &= ~ESS_AUDIO_CTRL_STEREO;
   1487 	}
   1488 	ess_write_x_reg(sc, ESS_XCMD_AUDIO_CTRL, reg);
   1489 
   1490 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO1_CTRL1);
   1491 	if (param->precision == 16)
   1492 		reg |= ESS_AUDIO1_CTRL1_FIFO_SIZE;
   1493 	else
   1494 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_SIZE;
   1495 	if (param->channels == 2)
   1496 		reg |= ESS_AUDIO1_CTRL1_FIFO_STEREO;
   1497 	else
   1498 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_STEREO;
   1499 	if (param->encoding == AUDIO_ENCODING_SLINEAR_BE ||
   1500 	    param->encoding == AUDIO_ENCODING_SLINEAR_LE)
   1501 		reg |= ESS_AUDIO1_CTRL1_FIFO_SIGNED;
   1502 	else
   1503 		reg &= ~ESS_AUDIO1_CTRL1_FIFO_SIGNED;
   1504 	reg |= ESS_AUDIO1_CTRL1_FIFO_CONNECT;
   1505 	ess_write_x_reg(sc, ESS_XCMD_AUDIO1_CTRL1, reg);
   1506 
   1507 	isa_dmastart(sc->sc_ic, sc->sc_audio1.drq, start,
   1508 		     (char *)end - (char *)start, NULL,
   1509 	    DMAMODE_READ | DMAMODE_LOOPDEMAND, BUS_DMA_NOWAIT);
   1510 
   1511 	/* Program transfer count registers with 2's complement of count. */
   1512 	blksize = -blksize;
   1513 	ess_write_x_reg(sc, ESS_XCMD_XFER_COUNTLO, blksize);
   1514 	ess_write_x_reg(sc, ESS_XCMD_XFER_COUNTHI, blksize >> 8);
   1515 
   1516 	/* Use 4 bytes per input DMA. */
   1517 	ess_set_xreg_bits(sc, ESS_XCMD_DEMAND_CTRL, ESS_DEMAND_CTRL_DEMAND_4);
   1518 
   1519 	/* Start auto-init DMA */
   1520 	ess_wdsp(sc, ESS_ACMD_DISABLE_SPKR);
   1521 	reg = ess_read_x_reg(sc, ESS_XCMD_AUDIO1_CTRL2);
   1522 	reg |= ESS_AUDIO1_CTRL2_DMA_READ | ESS_AUDIO1_CTRL2_ADC_ENABLE;
   1523 	reg |= ESS_AUDIO1_CTRL2_FIFO_ENABLE | ESS_AUDIO1_CTRL2_AUTO_INIT;
   1524 	ess_write_x_reg(sc, ESS_XCMD_AUDIO1_CTRL2, reg);
   1525 
   1526 	return 0;
   1527 }
   1528 
   1529 int
   1530 ess_audio1_halt(void *addr)
   1531 {
   1532 	struct ess_softc *sc;
   1533 
   1534 	sc = addr;
   1535 	DPRINTF(("ess_audio1_halt: sc=%p\n", sc));
   1536 
   1537 	if (sc->sc_audio1.active) {
   1538 		ess_clear_xreg_bits(sc, ESS_XCMD_AUDIO1_CTRL2,
   1539 		    ESS_AUDIO1_CTRL2_FIFO_ENABLE);
   1540 		isa_dmaabort(sc->sc_ic, sc->sc_audio1.drq);
   1541 		if (sc->sc_audio1.polled)
   1542 			callout_stop(&sc->sc_poll1_ch);
   1543 		sc->sc_audio1.active = 0;
   1544 	}
   1545 
   1546 	return 0;
   1547 }
   1548 
   1549 int
   1550 ess_audio2_halt(void *addr)
   1551 {
   1552 	struct ess_softc *sc;
   1553 
   1554 	sc = addr;
   1555 	DPRINTF(("ess_audio2_halt: sc=%p\n", sc));
   1556 
   1557 	if (sc->sc_audio2.active) {
   1558 		ess_clear_mreg_bits(sc, ESS_MREG_AUDIO2_CTRL1,
   1559 		    ESS_AUDIO2_CTRL1_DAC_ENABLE |
   1560 		    ESS_AUDIO2_CTRL1_FIFO_ENABLE);
   1561 		isa_dmaabort(sc->sc_ic, sc->sc_audio2.drq);
   1562 		if (sc->sc_audio2.polled)
   1563 			callout_stop(&sc->sc_poll2_ch);
   1564 		sc->sc_audio2.active = 0;
   1565 	}
   1566 
   1567 	return 0;
   1568 }
   1569 
   1570 int
   1571 ess_audio1_intr(void *arg)
   1572 {
   1573 	struct ess_softc *sc;
   1574 	uint8_t reg;
   1575 	int rv;
   1576 
   1577 	sc = arg;
   1578 	DPRINTFN(1,("ess_audio1_intr: intr=%p\n", sc->sc_audio1.intr));
   1579 
   1580 	mutex_spin_enter(&sc->sc_intr_lock);
   1581 
   1582 	/* Check and clear interrupt on Audio1. */
   1583 	reg = EREAD1(sc->sc_iot, sc->sc_ioh, ESS_DSP_RW_STATUS);
   1584 	if ((reg & ESS_DSP_READ_OFLOW) == 0) {
   1585 		mutex_spin_exit(&sc->sc_intr_lock);
   1586 		return 0;
   1587 	}
   1588 	reg = EREAD1(sc->sc_iot, sc->sc_ioh, ESS_CLEAR_INTR);
   1589 
   1590 	sc->sc_audio1.nintr++;
   1591 
   1592 	if (sc->sc_audio1.active) {
   1593 		(*sc->sc_audio1.intr)(sc->sc_audio1.arg);
   1594 		rv = 1;
   1595 	} else
   1596 		rv = 0;
   1597 
   1598 	mutex_spin_exit(&sc->sc_intr_lock);
   1599 
   1600 	return rv;
   1601 }
   1602 
   1603 int
   1604 ess_audio2_intr(void *arg)
   1605 {
   1606 	struct ess_softc *sc;
   1607 	uint8_t reg;
   1608 	int rv;
   1609 
   1610 	sc = arg;
   1611 	DPRINTFN(1,("ess_audio2_intr: intr=%p\n", sc->sc_audio2.intr));
   1612 
   1613 	mutex_spin_enter(&sc->sc_intr_lock);
   1614 
   1615 	/* Check and clear interrupt on Audio2. */
   1616 	reg = ess_read_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2);
   1617 	if ((reg & ESS_AUDIO2_CTRL2_IRQ_LATCH) == 0) {
   1618 		mutex_spin_exit(&sc->sc_intr_lock);
   1619 		return 0;
   1620 	}
   1621 	reg &= ~ESS_AUDIO2_CTRL2_IRQ_LATCH;
   1622 	ess_write_mix_reg(sc, ESS_MREG_AUDIO2_CTRL2, reg);
   1623 
   1624 	sc->sc_audio2.nintr++;
   1625 
   1626 	if (sc->sc_audio2.active) {
   1627 		(*sc->sc_audio2.intr)(sc->sc_audio2.arg);
   1628 		rv = 1;
   1629 	} else
   1630 		rv = 0;
   1631 
   1632 	mutex_spin_exit(&sc->sc_intr_lock);
   1633 
   1634 	return rv;
   1635 }
   1636 
   1637 void
   1638 ess_audio1_poll(void *addr)
   1639 {
   1640 	struct ess_softc *sc;
   1641 	int dmapos, dmacount;
   1642 
   1643 	sc = addr;
   1644 	mutex_spin_enter(&sc->sc_intr_lock);
   1645 
   1646 	if (!sc->sc_audio1.active) {
   1647 		mutex_spin_exit(&sc->sc_intr_lock);
   1648 		return;
   1649 	}
   1650 
   1651 	sc->sc_audio1.nintr++;
   1652 
   1653 	dmapos = isa_dmacount(sc->sc_ic, sc->sc_audio1.drq);
   1654 	dmacount = sc->sc_audio1.dmapos - dmapos;
   1655 	if (dmacount < 0)
   1656 		dmacount += sc->sc_audio1.buffersize;
   1657 	sc->sc_audio1.dmapos = dmapos;
   1658 #if 1
   1659 	dmacount += sc->sc_audio1.dmacount;
   1660 	while (dmacount > sc->sc_audio1.blksize) {
   1661 		dmacount -= sc->sc_audio1.blksize;
   1662 		(*sc->sc_audio1.intr)(sc->sc_audio1.arg);
   1663 	}
   1664 	sc->sc_audio1.dmacount = dmacount;
   1665 #else
   1666 	(*sc->sc_audio1.intr)(sc->sc_audio1.arg, dmacount);
   1667 #endif
   1668 
   1669 	mutex_spin_exit(&sc->sc_intr_lock);
   1670 	callout_reset(&sc->sc_poll1_ch, hz / 30, ess_audio1_poll, sc);
   1671 }
   1672 
   1673 void
   1674 ess_audio2_poll(void *addr)
   1675 {
   1676 	struct ess_softc *sc;
   1677 	int dmapos, dmacount;
   1678 
   1679 	sc = addr;
   1680 	mutex_spin_enter(&sc->sc_intr_lock);
   1681 
   1682 	if (!sc->sc_audio2.active) {
   1683 		mutex_spin_exit(&sc->sc_intr_lock);
   1684 		return;
   1685 	}
   1686 
   1687 	sc->sc_audio2.nintr++;
   1688 
   1689 	dmapos = isa_dmacount(sc->sc_ic, sc->sc_audio2.drq);
   1690 	dmacount = sc->sc_audio2.dmapos - dmapos;
   1691 	if (dmacount < 0)
   1692 		dmacount += sc->sc_audio2.buffersize;
   1693 	sc->sc_audio2.dmapos = dmapos;
   1694 #if 1
   1695 	dmacount += sc->sc_audio2.dmacount;
   1696 	while (dmacount > sc->sc_audio2.blksize) {
   1697 		dmacount -= sc->sc_audio2.blksize;
   1698 		(*sc->sc_audio2.intr)(sc->sc_audio2.arg);
   1699 	}
   1700 	sc->sc_audio2.dmacount = dmacount;
   1701 #else
   1702 	(*sc->sc_audio2.intr)(sc->sc_audio2.arg, dmacount);
   1703 #endif
   1704 
   1705 	mutex_spin_exit(&sc->sc_intr_lock);
   1706 	callout_reset(&sc->sc_poll2_ch, hz / 30, ess_audio2_poll, sc);
   1707 }
   1708 
   1709 int
   1710 ess_round_blocksize(void *addr, int blk, int mode,
   1711     const audio_params_t *param)
   1712 {
   1713 
   1714 	return blk & -8;	/* round for max DMA size */
   1715 }
   1716 
   1717 int
   1718 ess_set_port(void *addr, mixer_ctrl_t *cp)
   1719 {
   1720 	struct ess_softc *sc;
   1721 	int lgain, rgain;
   1722 
   1723 	sc = addr;
   1724 	DPRINTFN(5,("ess_set_port: port=%d num_channels=%d\n",
   1725 		    cp->dev, cp->un.value.num_channels));
   1726 
   1727 	switch (cp->dev) {
   1728 	/*
   1729 	 * The following mixer ports are all stereo. If we get a
   1730 	 * single-channel gain value passed in, then we duplicate it
   1731 	 * to both left and right channels.
   1732 	 */
   1733 	case ESS_MASTER_VOL:
   1734 	case ESS_DAC_PLAY_VOL:
   1735 	case ESS_MIC_PLAY_VOL:
   1736 	case ESS_LINE_PLAY_VOL:
   1737 	case ESS_SYNTH_PLAY_VOL:
   1738 	case ESS_CD_PLAY_VOL:
   1739 	case ESS_AUXB_PLAY_VOL:
   1740 	case ESS_RECORD_VOL:
   1741 		if (cp->type != AUDIO_MIXER_VALUE)
   1742 			return EINVAL;
   1743 
   1744 		switch (cp->un.value.num_channels) {
   1745 		case 1:
   1746 			lgain = rgain = ESS_4BIT_GAIN(
   1747 			  cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
   1748 			break;
   1749 		case 2:
   1750 			lgain = ESS_4BIT_GAIN(
   1751 			  cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
   1752 			rgain = ESS_4BIT_GAIN(
   1753 			  cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT]);
   1754 			break;
   1755 		default:
   1756 			return EINVAL;
   1757 		}
   1758 
   1759 		sc->gain[cp->dev][ESS_LEFT]  = lgain;
   1760 		sc->gain[cp->dev][ESS_RIGHT] = rgain;
   1761 		ess_set_gain(sc, cp->dev, 1);
   1762 		return 0;
   1763 
   1764 	/*
   1765 	 * The PC speaker port is mono. If we get a stereo gain value
   1766 	 * passed in, then we return EINVAL.
   1767 	 */
   1768 	case ESS_PCSPEAKER_VOL:
   1769 		if (cp->un.value.num_channels != 1)
   1770 			return EINVAL;
   1771 
   1772 		sc->gain[cp->dev][ESS_LEFT] = sc->gain[cp->dev][ESS_RIGHT] =
   1773 		  ESS_3BIT_GAIN(cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
   1774 		ess_set_gain(sc, cp->dev, 1);
   1775 		return 0;
   1776 
   1777 	case ESS_RECORD_SOURCE:
   1778 		if (ESS_USE_AUDIO1(sc->sc_model)) {
   1779 			if (cp->type == AUDIO_MIXER_ENUM)
   1780 				return ess_set_in_port(sc, cp->un.ord);
   1781 			else
   1782 				return EINVAL;
   1783 		} else {
   1784 			if (cp->type == AUDIO_MIXER_SET)
   1785 				return ess_set_in_ports(sc, cp->un.mask);
   1786 			else
   1787 				return EINVAL;
   1788 		}
   1789 		return 0;
   1790 
   1791 	case ESS_RECORD_MONITOR:
   1792 		if (cp->type != AUDIO_MIXER_ENUM)
   1793 			return EINVAL;
   1794 
   1795 		if (cp->un.ord)
   1796 			/* Enable monitor */
   1797 			ess_set_xreg_bits(sc, ESS_XCMD_AUDIO_CTRL,
   1798 					  ESS_AUDIO_CTRL_MONITOR);
   1799 		else
   1800 			/* Disable monitor */
   1801 			ess_clear_xreg_bits(sc, ESS_XCMD_AUDIO_CTRL,
   1802 					    ESS_AUDIO_CTRL_MONITOR);
   1803 		return 0;
   1804 	}
   1805 
   1806 	if (ESS_IS_ES18X9(sc->sc_model)) {
   1807 
   1808 		switch (cp->dev) {
   1809 		case ESS_SPATIALIZER:
   1810 			if (cp->type != AUDIO_MIXER_VALUE ||
   1811 			    cp->un.value.num_channels != 1)
   1812 				return EINVAL;
   1813 
   1814 			sc->gain[cp->dev][ESS_LEFT] =
   1815 				sc->gain[cp->dev][ESS_RIGHT] = ESS_6BIT_GAIN(
   1816 				    cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
   1817 			ess_set_gain(sc, cp->dev, 1);
   1818 			return 0;
   1819 
   1820 		case ESS_SPATIALIZER_ENABLE:
   1821 			if (cp->type != AUDIO_MIXER_ENUM)
   1822 				return EINVAL;
   1823 
   1824 			sc->sc_spatializer = (cp->un.ord != 0);
   1825 			if (sc->sc_spatializer)
   1826 				ess_set_mreg_bits(sc, ESS_MREG_SPATIAL_CTRL,
   1827 				    ESS_SPATIAL_CTRL_ENABLE);
   1828 			else
   1829 				ess_clear_mreg_bits(sc, ESS_MREG_SPATIAL_CTRL,
   1830 				    ESS_SPATIAL_CTRL_ENABLE);
   1831 			return 0;
   1832 		}
   1833 	}
   1834 
   1835 	if (ESS_USE_AUDIO1(sc->sc_model))
   1836 		return EINVAL;
   1837 
   1838 	switch (cp->dev) {
   1839 	case ESS_DAC_REC_VOL:
   1840 	case ESS_MIC_REC_VOL:
   1841 	case ESS_LINE_REC_VOL:
   1842 	case ESS_SYNTH_REC_VOL:
   1843 	case ESS_CD_REC_VOL:
   1844 	case ESS_AUXB_REC_VOL:
   1845 		if (cp->type != AUDIO_MIXER_VALUE)
   1846 			return EINVAL;
   1847 
   1848 		switch (cp->un.value.num_channels) {
   1849 		case 1:
   1850 			lgain = rgain = ESS_4BIT_GAIN(
   1851 			  cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
   1852 			break;
   1853 		case 2:
   1854 			lgain = ESS_4BIT_GAIN(
   1855 			  cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
   1856 			rgain = ESS_4BIT_GAIN(
   1857 			  cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT]);
   1858 			break;
   1859 		default:
   1860 			return EINVAL;
   1861 		}
   1862 
   1863 		sc->gain[cp->dev][ESS_LEFT]  = lgain;
   1864 		sc->gain[cp->dev][ESS_RIGHT] = rgain;
   1865 		ess_set_gain(sc, cp->dev, 1);
   1866 		return 0;
   1867 
   1868 	case ESS_MIC_PREAMP:
   1869 		if (cp->type != AUDIO_MIXER_ENUM)
   1870 			return EINVAL;
   1871 
   1872 		if (cp->un.ord)
   1873 			/* Enable microphone preamp */
   1874 			ess_set_xreg_bits(sc, ESS_XCMD_PREAMP_CTRL,
   1875 					  ESS_PREAMP_CTRL_ENABLE);
   1876 		else
   1877 			/* Disable microphone preamp */
   1878 			ess_clear_xreg_bits(sc, ESS_XCMD_PREAMP_CTRL,
   1879 					  ESS_PREAMP_CTRL_ENABLE);
   1880 		return 0;
   1881 	}
   1882 
   1883 	return EINVAL;
   1884 }
   1885 
   1886 int
   1887 ess_get_port(void *addr, mixer_ctrl_t *cp)
   1888 {
   1889 	struct ess_softc *sc;
   1890 
   1891 	sc = addr;
   1892 	DPRINTFN(5,("ess_get_port: port=%d\n", cp->dev));
   1893 
   1894 	switch (cp->dev) {
   1895 	case ESS_MASTER_VOL:
   1896 	case ESS_DAC_PLAY_VOL:
   1897 	case ESS_MIC_PLAY_VOL:
   1898 	case ESS_LINE_PLAY_VOL:
   1899 	case ESS_SYNTH_PLAY_VOL:
   1900 	case ESS_CD_PLAY_VOL:
   1901 	case ESS_AUXB_PLAY_VOL:
   1902 	case ESS_RECORD_VOL:
   1903 		switch (cp->un.value.num_channels) {
   1904 		case 1:
   1905 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
   1906 				sc->gain[cp->dev][ESS_LEFT];
   1907 			break;
   1908 		case 2:
   1909 			cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
   1910 				sc->gain[cp->dev][ESS_LEFT];
   1911 			cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
   1912 				sc->gain[cp->dev][ESS_RIGHT];
   1913 			break;
   1914 		default:
   1915 			return EINVAL;
   1916 		}
   1917 		return 0;
   1918 
   1919 	case ESS_PCSPEAKER_VOL:
   1920 		if (cp->un.value.num_channels != 1)
   1921 			return EINVAL;
   1922 
   1923 		cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
   1924 			sc->gain[cp->dev][ESS_LEFT];
   1925 		return 0;
   1926 
   1927 	case ESS_RECORD_SOURCE:
   1928 		if (ESS_USE_AUDIO1(sc->sc_model))
   1929 			cp->un.ord = sc->in_port;
   1930 		else
   1931 			cp->un.mask = sc->in_mask;
   1932 		return 0;
   1933 
   1934 	case ESS_RECORD_MONITOR:
   1935 		cp->un.ord = (ess_read_x_reg(sc, ESS_XCMD_AUDIO_CTRL) &
   1936 			      ESS_AUDIO_CTRL_MONITOR) ? 1 : 0;
   1937 		return 0;
   1938 	}
   1939 
   1940 	if (ESS_IS_ES18X9(sc->sc_model)) {
   1941 
   1942 		switch (cp->dev) {
   1943 		case ESS_SPATIALIZER:
   1944 			if (cp->un.value.num_channels != 1)
   1945 				return EINVAL;
   1946 
   1947 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
   1948 				sc->gain[cp->dev][ESS_LEFT];
   1949 			return 0;
   1950 
   1951 		case ESS_SPATIALIZER_ENABLE:
   1952 			cp->un.ord = sc->sc_spatializer;
   1953 			return 0;
   1954 		}
   1955 	}
   1956 
   1957 	if (ESS_USE_AUDIO1(sc->sc_model))
   1958 		return EINVAL;
   1959 
   1960 	switch (cp->dev) {
   1961 	case ESS_DAC_REC_VOL:
   1962 	case ESS_MIC_REC_VOL:
   1963 	case ESS_LINE_REC_VOL:
   1964 	case ESS_SYNTH_REC_VOL:
   1965 	case ESS_CD_REC_VOL:
   1966 	case ESS_AUXB_REC_VOL:
   1967 		switch (cp->un.value.num_channels) {
   1968 		case 1:
   1969 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
   1970 				sc->gain[cp->dev][ESS_LEFT];
   1971 			break;
   1972 		case 2:
   1973 			cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
   1974 				sc->gain[cp->dev][ESS_LEFT];
   1975 			cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
   1976 				sc->gain[cp->dev][ESS_RIGHT];
   1977 			break;
   1978 		default:
   1979 			return EINVAL;
   1980 		}
   1981 		return 0;
   1982 
   1983 	case ESS_MIC_PREAMP:
   1984 		cp->un.ord = (ess_read_x_reg(sc, ESS_XCMD_PREAMP_CTRL) &
   1985 			      ESS_PREAMP_CTRL_ENABLE) ? 1 : 0;
   1986 		return 0;
   1987 	}
   1988 
   1989 	return EINVAL;
   1990 }
   1991 
   1992 int
   1993 ess_query_devinfo(void *addr, mixer_devinfo_t *dip)
   1994 {
   1995 	struct ess_softc *sc;
   1996 
   1997 	sc = addr;
   1998 	DPRINTFN(5,("ess_query_devinfo: model=%d index=%d\n",
   1999 		    sc->sc_model, dip->index));
   2000 
   2001 	/*
   2002 	 * REVISIT: There are some slight differences between the
   2003 	 *          mixers on the different ESS chips, which can
   2004 	 *          be sorted out using the chip model rather than a
   2005 	 *          separate mixer model.
   2006 	 *          This is currently coded assuming an ES1887; we
   2007 	 *          need to work out which bits are not applicable to
   2008 	 *          the other models (1888 and 888).
   2009 	 */
   2010 	switch (dip->index) {
   2011 	case ESS_DAC_PLAY_VOL:
   2012 		dip->mixer_class = ESS_INPUT_CLASS;
   2013 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2014 		strcpy(dip->label.name, AudioNdac);
   2015 		dip->type = AUDIO_MIXER_VALUE;
   2016 		dip->un.v.num_channels = 2;
   2017 		strcpy(dip->un.v.units.name, AudioNvolume);
   2018 		return 0;
   2019 
   2020 	case ESS_MIC_PLAY_VOL:
   2021 		dip->mixer_class = ESS_INPUT_CLASS;
   2022 		dip->prev = AUDIO_MIXER_LAST;
   2023 		if (ESS_USE_AUDIO1(sc->sc_model))
   2024 			dip->next = AUDIO_MIXER_LAST;
   2025 		else
   2026 			dip->next = ESS_MIC_PREAMP;
   2027 		strcpy(dip->label.name, AudioNmicrophone);
   2028 		dip->type = AUDIO_MIXER_VALUE;
   2029 		dip->un.v.num_channels = 2;
   2030 		strcpy(dip->un.v.units.name, AudioNvolume);
   2031 		return 0;
   2032 
   2033 	case ESS_LINE_PLAY_VOL:
   2034 		dip->mixer_class = ESS_INPUT_CLASS;
   2035 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2036 		strcpy(dip->label.name, AudioNline);
   2037 		dip->type = AUDIO_MIXER_VALUE;
   2038 		dip->un.v.num_channels = 2;
   2039 		strcpy(dip->un.v.units.name, AudioNvolume);
   2040 		return 0;
   2041 
   2042 	case ESS_SYNTH_PLAY_VOL:
   2043 		dip->mixer_class = ESS_INPUT_CLASS;
   2044 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2045 		strcpy(dip->label.name, AudioNfmsynth);
   2046 		dip->type = AUDIO_MIXER_VALUE;
   2047 		dip->un.v.num_channels = 2;
   2048 		strcpy(dip->un.v.units.name, AudioNvolume);
   2049 		return 0;
   2050 
   2051 	case ESS_CD_PLAY_VOL:
   2052 		dip->mixer_class = ESS_INPUT_CLASS;
   2053 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2054 		strcpy(dip->label.name, AudioNcd);
   2055 		dip->type = AUDIO_MIXER_VALUE;
   2056 		dip->un.v.num_channels = 2;
   2057 		strcpy(dip->un.v.units.name, AudioNvolume);
   2058 		return 0;
   2059 
   2060 	case ESS_AUXB_PLAY_VOL:
   2061 		dip->mixer_class = ESS_INPUT_CLASS;
   2062 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2063 		strcpy(dip->label.name, "auxb");
   2064 		dip->type = AUDIO_MIXER_VALUE;
   2065 		dip->un.v.num_channels = 2;
   2066 		strcpy(dip->un.v.units.name, AudioNvolume);
   2067 		return 0;
   2068 
   2069 	case ESS_INPUT_CLASS:
   2070 		dip->mixer_class = ESS_INPUT_CLASS;
   2071 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2072 		strcpy(dip->label.name, AudioCinputs);
   2073 		dip->type = AUDIO_MIXER_CLASS;
   2074 		return 0;
   2075 
   2076 	case ESS_MASTER_VOL:
   2077 		dip->mixer_class = ESS_OUTPUT_CLASS;
   2078 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2079 		strcpy(dip->label.name, AudioNmaster);
   2080 		dip->type = AUDIO_MIXER_VALUE;
   2081 		dip->un.v.num_channels = 2;
   2082 		strcpy(dip->un.v.units.name, AudioNvolume);
   2083 		return 0;
   2084 
   2085 	case ESS_PCSPEAKER_VOL:
   2086 		dip->mixer_class = ESS_OUTPUT_CLASS;
   2087 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2088 		strcpy(dip->label.name, "pc_speaker");
   2089 		dip->type = AUDIO_MIXER_VALUE;
   2090 		dip->un.v.num_channels = 1;
   2091 		strcpy(dip->un.v.units.name, AudioNvolume);
   2092 		return 0;
   2093 
   2094 	case ESS_OUTPUT_CLASS:
   2095 		dip->mixer_class = ESS_OUTPUT_CLASS;
   2096 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2097 		strcpy(dip->label.name, AudioCoutputs);
   2098 		dip->type = AUDIO_MIXER_CLASS;
   2099 		return 0;
   2100 
   2101 	case ESS_RECORD_VOL:
   2102 		dip->mixer_class = ESS_RECORD_CLASS;
   2103 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2104 		strcpy(dip->label.name, AudioNrecord);
   2105 		dip->type = AUDIO_MIXER_VALUE;
   2106 		dip->un.v.num_channels = 2;
   2107 		strcpy(dip->un.v.units.name, AudioNvolume);
   2108 		return 0;
   2109 
   2110 	case ESS_RECORD_SOURCE:
   2111 		dip->mixer_class = ESS_RECORD_CLASS;
   2112 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2113 		strcpy(dip->label.name, AudioNsource);
   2114 		if (ESS_USE_AUDIO1(sc->sc_model)) {
   2115 			/*
   2116 			 * The 1788 doesn't use the input mixer control that
   2117 			 * the 1888 uses, because it's a pain when you only
   2118 			 * have one mixer.
   2119 			 * Perhaps it could be emulated by keeping both sets of
   2120 			 * gain values, and doing a `context switch' of the
   2121 			 * mixer registers when shifting from playing to
   2122 			 * recording.
   2123 			 */
   2124 			dip->type = AUDIO_MIXER_ENUM;
   2125 			dip->un.e.num_mem = 4;
   2126 			strcpy(dip->un.e.member[0].label.name, AudioNmicrophone);
   2127 			dip->un.e.member[0].ord = ESS_SOURCE_MIC;
   2128 			strcpy(dip->un.e.member[1].label.name, AudioNline);
   2129 			dip->un.e.member[1].ord = ESS_SOURCE_LINE;
   2130 			strcpy(dip->un.e.member[2].label.name, AudioNcd);
   2131 			dip->un.e.member[2].ord = ESS_SOURCE_CD;
   2132 			strcpy(dip->un.e.member[3].label.name, AudioNmixerout);
   2133 			dip->un.e.member[3].ord = ESS_SOURCE_MIXER;
   2134 		} else {
   2135 			dip->type = AUDIO_MIXER_SET;
   2136 			dip->un.s.num_mem = 6;
   2137 			strcpy(dip->un.s.member[0].label.name, AudioNdac);
   2138 			dip->un.s.member[0].mask = 1 << ESS_DAC_REC_VOL;
   2139 			strcpy(dip->un.s.member[1].label.name, AudioNmicrophone);
   2140 			dip->un.s.member[1].mask = 1 << ESS_MIC_REC_VOL;
   2141 			strcpy(dip->un.s.member[2].label.name, AudioNline);
   2142 			dip->un.s.member[2].mask = 1 << ESS_LINE_REC_VOL;
   2143 			strcpy(dip->un.s.member[3].label.name, AudioNfmsynth);
   2144 			dip->un.s.member[3].mask = 1 << ESS_SYNTH_REC_VOL;
   2145 			strcpy(dip->un.s.member[4].label.name, AudioNcd);
   2146 			dip->un.s.member[4].mask = 1 << ESS_CD_REC_VOL;
   2147 			strcpy(dip->un.s.member[5].label.name, "auxb");
   2148 			dip->un.s.member[5].mask = 1 << ESS_AUXB_REC_VOL;
   2149 		}
   2150 		return 0;
   2151 
   2152 	case ESS_RECORD_CLASS:
   2153 		dip->mixer_class = ESS_RECORD_CLASS;
   2154 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2155 		strcpy(dip->label.name, AudioCrecord);
   2156 		dip->type = AUDIO_MIXER_CLASS;
   2157 		return 0;
   2158 
   2159 	case ESS_RECORD_MONITOR:
   2160 		dip->prev = dip->next = AUDIO_MIXER_LAST;
   2161 		strcpy(dip->label.name, AudioNmute);
   2162 		dip->type = AUDIO_MIXER_ENUM;
   2163 		dip->mixer_class = ESS_MONITOR_CLASS;
   2164 		dip->un.e.num_mem = 2;
   2165 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
   2166 		dip->un.e.member[0].ord = 0;
   2167 		strcpy(dip->un.e.member[1].label.name, AudioNon);
   2168 		dip->un.e.member[1].ord = 1;
   2169 		return 0;
   2170 
   2171 	case ESS_MONITOR_CLASS:
   2172 		dip->mixer_class = ESS_MONITOR_CLASS;
   2173 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2174 		strcpy(dip->label.name, AudioCmonitor);
   2175 		dip->type = AUDIO_MIXER_CLASS;
   2176 		return 0;
   2177 	}
   2178 
   2179 	if (ESS_IS_ES18X9(sc->sc_model)) {
   2180 
   2181 		switch (dip->index) {
   2182 		case ESS_SPATIALIZER:
   2183 			dip->mixer_class = ESS_OUTPUT_CLASS;
   2184 			dip->prev = AUDIO_MIXER_LAST;
   2185 			dip->next = ESS_SPATIALIZER_ENABLE;
   2186 			strcpy(dip->label.name, AudioNspatial);
   2187 			dip->type = AUDIO_MIXER_VALUE;
   2188 			dip->un.v.num_channels = 1;
   2189 			strcpy(dip->un.v.units.name, "level");
   2190 			return 0;
   2191 
   2192 		case ESS_SPATIALIZER_ENABLE:
   2193 			dip->mixer_class = ESS_OUTPUT_CLASS;
   2194 			dip->prev = ESS_SPATIALIZER;
   2195 			dip->next = AUDIO_MIXER_LAST;
   2196 			strcpy(dip->label.name, "enable");
   2197 			dip->type = AUDIO_MIXER_ENUM;
   2198 			dip->un.e.num_mem = 2;
   2199 			strcpy(dip->un.e.member[0].label.name, AudioNoff);
   2200 			dip->un.e.member[0].ord = 0;
   2201 			strcpy(dip->un.e.member[1].label.name, AudioNon);
   2202 			dip->un.e.member[1].ord = 1;
   2203 			return 0;
   2204 		}
   2205 	}
   2206 
   2207 	if (ESS_USE_AUDIO1(sc->sc_model))
   2208 		return ENXIO;
   2209 
   2210 	switch (dip->index) {
   2211 	case ESS_DAC_REC_VOL:
   2212 		dip->mixer_class = ESS_RECORD_CLASS;
   2213 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2214 		strcpy(dip->label.name, AudioNdac);
   2215 		dip->type = AUDIO_MIXER_VALUE;
   2216 		dip->un.v.num_channels = 2;
   2217 		strcpy(dip->un.v.units.name, AudioNvolume);
   2218 		return 0;
   2219 
   2220 	case ESS_MIC_REC_VOL:
   2221 		dip->mixer_class = ESS_RECORD_CLASS;
   2222 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2223 		strcpy(dip->label.name, AudioNmicrophone);
   2224 		dip->type = AUDIO_MIXER_VALUE;
   2225 		dip->un.v.num_channels = 2;
   2226 		strcpy(dip->un.v.units.name, AudioNvolume);
   2227 		return 0;
   2228 
   2229 	case ESS_LINE_REC_VOL:
   2230 		dip->mixer_class = ESS_RECORD_CLASS;
   2231 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2232 		strcpy(dip->label.name, AudioNline);
   2233 		dip->type = AUDIO_MIXER_VALUE;
   2234 		dip->un.v.num_channels = 2;
   2235 		strcpy(dip->un.v.units.name, AudioNvolume);
   2236 		return 0;
   2237 
   2238 	case ESS_SYNTH_REC_VOL:
   2239 		dip->mixer_class = ESS_RECORD_CLASS;
   2240 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2241 		strcpy(dip->label.name, AudioNfmsynth);
   2242 		dip->type = AUDIO_MIXER_VALUE;
   2243 		dip->un.v.num_channels = 2;
   2244 		strcpy(dip->un.v.units.name, AudioNvolume);
   2245 		return 0;
   2246 
   2247 	case ESS_CD_REC_VOL:
   2248 		dip->mixer_class = ESS_RECORD_CLASS;
   2249 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2250 		strcpy(dip->label.name, AudioNcd);
   2251 		dip->type = AUDIO_MIXER_VALUE;
   2252 		dip->un.v.num_channels = 2;
   2253 		strcpy(dip->un.v.units.name, AudioNvolume);
   2254 		return 0;
   2255 
   2256 	case ESS_AUXB_REC_VOL:
   2257 		dip->mixer_class = ESS_RECORD_CLASS;
   2258 		dip->next = dip->prev = AUDIO_MIXER_LAST;
   2259 		strcpy(dip->label.name, "auxb");
   2260 		dip->type = AUDIO_MIXER_VALUE;
   2261 		dip->un.v.num_channels = 2;
   2262 		strcpy(dip->un.v.units.name, AudioNvolume);
   2263 		return 0;
   2264 
   2265 	case ESS_MIC_PREAMP:
   2266 		dip->mixer_class = ESS_INPUT_CLASS;
   2267 		dip->prev = ESS_MIC_PLAY_VOL;
   2268 		dip->next = AUDIO_MIXER_LAST;
   2269 		strcpy(dip->label.name, AudioNpreamp);
   2270 		dip->type = AUDIO_MIXER_ENUM;
   2271 		dip->un.e.num_mem = 2;
   2272 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
   2273 		dip->un.e.member[0].ord = 0;
   2274 		strcpy(dip->un.e.member[1].label.name, AudioNon);
   2275 		dip->un.e.member[1].ord = 1;
   2276 		return 0;
   2277 	}
   2278 
   2279 	return ENXIO;
   2280 }
   2281 
   2282 void *
   2283 ess_malloc(void *addr, int direction, size_t size)
   2284 {
   2285 	struct ess_softc *sc;
   2286 	int drq;
   2287 
   2288 	sc = addr;
   2289 	if ((!ESS_USE_AUDIO1(sc->sc_model)) && direction == AUMODE_PLAY)
   2290 		drq = sc->sc_audio2.drq;
   2291 	else
   2292 		drq = sc->sc_audio1.drq;
   2293 	return (isa_malloc(sc->sc_ic, drq, size, M_DEVBUF, M_WAITOK));
   2294 }
   2295 
   2296 void
   2297 ess_free(void *addr, void *ptr, size_t size)
   2298 {
   2299 
   2300 	isa_free(ptr, M_DEVBUF);
   2301 }
   2302 
   2303 size_t
   2304 ess_round_buffersize(void *addr, int direction, size_t size)
   2305 {
   2306 	struct ess_softc *sc;
   2307 	bus_size_t maxsize;
   2308 
   2309 	sc = addr;
   2310 	if ((!ESS_USE_AUDIO1(sc->sc_model)) && direction == AUMODE_PLAY)
   2311 		maxsize = sc->sc_audio2.maxsize;
   2312 	else
   2313 		maxsize = sc->sc_audio1.maxsize;
   2314 
   2315 	if (size > maxsize)
   2316 		size = maxsize;
   2317 	return size;
   2318 }
   2319 
   2320 paddr_t
   2321 ess_mappage(void *addr, void *mem, off_t off, int prot)
   2322 {
   2323 
   2324 	return isa_mappage(mem, off, prot);
   2325 }
   2326 
   2327 int
   2328 ess_1788_get_props(void *addr)
   2329 {
   2330 
   2331 	return AUDIO_PROP_MMAP | AUDIO_PROP_INDEPENDENT;
   2332 }
   2333 
   2334 int
   2335 ess_1888_get_props(void *addr)
   2336 {
   2337 
   2338 	return AUDIO_PROP_MMAP | AUDIO_PROP_INDEPENDENT | AUDIO_PROP_FULLDUPLEX;
   2339 }
   2340 
   2341 void
   2342 ess_get_locks(void *addr, kmutex_t **intr, kmutex_t **thread)
   2343 {
   2344 	struct ess_softc *sc;
   2345 
   2346 	sc = addr;
   2347 	*intr = &sc->sc_intr_lock;
   2348 	*thread = &sc->sc_lock;
   2349 }
   2350 
   2351 
   2352 /* ============================================
   2353  * Generic functions for ess, not used by audio h/w i/f
   2354  * =============================================
   2355  */
   2356 
   2357 /*
   2358  * Reset the chip.
   2359  * Return non-zero if the chip isn't detected.
   2360  */
   2361 int
   2362 ess_reset(struct ess_softc *sc)
   2363 {
   2364 	bus_space_tag_t iot;
   2365 	bus_space_handle_t ioh;
   2366 
   2367 	iot = sc->sc_iot;
   2368 	ioh = sc->sc_ioh;
   2369 	sc->sc_audio1.active = 0;
   2370 	sc->sc_audio2.active = 0;
   2371 
   2372 	EWRITE1(iot, ioh, ESS_DSP_RESET, ESS_RESET_EXT);
   2373 	delay(10000);		/* XXX shouldn't delay so long */
   2374 	EWRITE1(iot, ioh, ESS_DSP_RESET, 0);
   2375 	if (ess_rdsp(sc) != ESS_MAGIC)
   2376 		return 1;
   2377 
   2378 	/* Enable access to the ESS extension commands. */
   2379 	ess_wdsp(sc, ESS_ACMD_ENABLE_EXT);
   2380 
   2381 	return 0;
   2382 }
   2383 
   2384 void
   2385 ess_set_gain(struct ess_softc *sc, int port, int on)
   2386 {
   2387 	int gain, left, right;
   2388 	int mix;
   2389 	int src;
   2390 	int stereo;
   2391 
   2392 	/*
   2393 	 * Most gain controls are found in the mixer registers and
   2394 	 * are stereo. Any that are not, must set mix and stereo as
   2395 	 * required.
   2396 	 */
   2397 	mix = 1;
   2398 	stereo = 1;
   2399 
   2400 	if (ESS_IS_ES18X9(sc->sc_model)) {
   2401 		switch (port) {
   2402 		case ESS_SPATIALIZER:
   2403 			src = ESS_MREG_SPATIAL_LEVEL;
   2404 			stereo = -1;
   2405 			goto skip;
   2406 		case ESS_SPATIALIZER_ENABLE:
   2407 			return;
   2408 		}
   2409 	}
   2410 	switch (port) {
   2411 	case ESS_MASTER_VOL:
   2412 		src = ESS_MREG_VOLUME_MASTER;
   2413 		break;
   2414 	case ESS_DAC_PLAY_VOL:
   2415 		if (ESS_USE_AUDIO1(sc->sc_model))
   2416 			src = ESS_MREG_VOLUME_VOICE;
   2417 		else
   2418 			src = 0x7C;
   2419 		break;
   2420 	case ESS_MIC_PLAY_VOL:
   2421 		src = ESS_MREG_VOLUME_MIC;
   2422 		break;
   2423 	case ESS_LINE_PLAY_VOL:
   2424 		src = ESS_MREG_VOLUME_LINE;
   2425 		break;
   2426 	case ESS_SYNTH_PLAY_VOL:
   2427 		src = ESS_MREG_VOLUME_SYNTH;
   2428 		break;
   2429 	case ESS_CD_PLAY_VOL:
   2430 		src = ESS_MREG_VOLUME_CD;
   2431 		break;
   2432 	case ESS_AUXB_PLAY_VOL:
   2433 		src = ESS_MREG_VOLUME_AUXB;
   2434 		break;
   2435 	case ESS_PCSPEAKER_VOL:
   2436 		src = ESS_MREG_VOLUME_PCSPKR;
   2437 		stereo = 0;
   2438 		break;
   2439 	case ESS_DAC_REC_VOL:
   2440 		src = 0x69;
   2441 		break;
   2442 	case ESS_MIC_REC_VOL:
   2443 		src = 0x68;
   2444 		break;
   2445 	case ESS_LINE_REC_VOL:
   2446 		src = 0x6E;
   2447 		break;
   2448 	case ESS_SYNTH_REC_VOL:
   2449 		src = 0x6B;
   2450 		break;
   2451 	case ESS_CD_REC_VOL:
   2452 		src = 0x6A;
   2453 		break;
   2454 	case ESS_AUXB_REC_VOL:
   2455 		src = 0x6C;
   2456 		break;
   2457 	case ESS_RECORD_VOL:
   2458 		src = ESS_XCMD_VOLIN_CTRL;
   2459 		mix = 0;
   2460 		break;
   2461 	default:
   2462 		return;
   2463 	}
   2464 skip:
   2465 
   2466 	/* 1788 doesn't have a separate recording mixer */
   2467 	if (ESS_USE_AUDIO1(sc->sc_model) && mix && src > 0x62)
   2468 		return;
   2469 
   2470 	if (on) {
   2471 		left = sc->gain[port][ESS_LEFT];
   2472 		right = sc->gain[port][ESS_RIGHT];
   2473 	} else {
   2474 		left = right = 0;
   2475 	}
   2476 
   2477 	if (stereo == -1)
   2478 		gain = ESS_SPATIAL_GAIN(left);
   2479 	else if (stereo)
   2480 		gain = ESS_STEREO_GAIN(left, right);
   2481 	else
   2482 		gain = ESS_MONO_GAIN(left);
   2483 
   2484 	if (mix)
   2485 		ess_write_mix_reg(sc, src, gain);
   2486 	else
   2487 		ess_write_x_reg(sc, src, gain);
   2488 }
   2489 
   2490 /* Set the input device on devices without an input mixer. */
   2491 int
   2492 ess_set_in_port(struct ess_softc *sc, int ord)
   2493 {
   2494 	mixer_devinfo_t di;
   2495 	int i;
   2496 
   2497 	DPRINTF(("ess_set_in_port: ord=0x%x\n", ord));
   2498 
   2499 	/*
   2500 	 * Get the device info for the record source control,
   2501 	 * including the list of available sources.
   2502 	 */
   2503 	di.index = ESS_RECORD_SOURCE;
   2504 	if (ess_query_devinfo(sc, &di))
   2505 		return EINVAL;
   2506 
   2507 	/* See if the given ord value was anywhere in the list. */
   2508 	for (i = 0; i < di.un.e.num_mem; i++) {
   2509 		if (ord == di.un.e.member[i].ord)
   2510 			break;
   2511 	}
   2512 	if (i == di.un.e.num_mem)
   2513 		return EINVAL;
   2514 
   2515 	ess_write_mix_reg(sc, ESS_MREG_ADC_SOURCE, ord);
   2516 
   2517 	sc->in_port = ord;
   2518 	return 0;
   2519 }
   2520 
   2521 /* Set the input device levels on input-mixer-enabled devices. */
   2522 int
   2523 ess_set_in_ports(struct ess_softc *sc, int mask)
   2524 {
   2525 	mixer_devinfo_t di;
   2526 	int i, port;
   2527 
   2528 	DPRINTF(("ess_set_in_ports: mask=0x%x\n", mask));
   2529 
   2530 	/*
   2531 	 * Get the device info for the record source control,
   2532 	 * including the list of available sources.
   2533 	 */
   2534 	di.index = ESS_RECORD_SOURCE;
   2535 	if (ess_query_devinfo(sc, &di))
   2536 		return EINVAL;
   2537 
   2538 	/*
   2539 	 * Set or disable the record volume control for each of the
   2540 	 * possible sources.
   2541 	 */
   2542 	for (i = 0; i < di.un.s.num_mem; i++) {
   2543 		/*
   2544 		 * Calculate the source port number from its mask.
   2545 		 */
   2546 		port = ffs(di.un.s.member[i].mask);
   2547 
   2548 		/*
   2549 		 * Set the source gain:
   2550 		 *	to the current value if source is enabled
   2551 		 *	to zero if source is disabled
   2552 		 */
   2553 		ess_set_gain(sc, port, mask & di.un.s.member[i].mask);
   2554 	}
   2555 
   2556 	sc->in_mask = mask;
   2557 	return 0;
   2558 }
   2559 
   2560 void
   2561 ess_speaker_on(struct ess_softc *sc)
   2562 {
   2563 
   2564 	/* Unmute the DAC. */
   2565 	ess_set_gain(sc, ESS_DAC_PLAY_VOL, 1);
   2566 }
   2567 
   2568 void
   2569 ess_speaker_off(struct ess_softc *sc)
   2570 {
   2571 
   2572 	/* Mute the DAC. */
   2573 	ess_set_gain(sc, ESS_DAC_PLAY_VOL, 0);
   2574 }
   2575 
   2576 /*
   2577  * Calculate the time constant for the requested sampling rate.
   2578  */
   2579 u_int
   2580 ess_srtotc(struct ess_softc *sc, u_int rate)
   2581 {
   2582 	u_int tc;
   2583 
   2584 	/* The following formulae are from the ESS data sheet. */
   2585 	if (ESS_IS_ES18X9(sc->sc_model)) {
   2586 		if ((rate % 8000) != 0)
   2587 			tc = 128 - 793800L / rate;
   2588 		else
   2589 			tc = 256 - 768000L / rate;
   2590 	} else {
   2591 		if (rate <= 22050)
   2592 			tc = 128 - 397700L / rate;
   2593 		else
   2594 			tc = 256 - 795500L / rate;
   2595 	}
   2596 
   2597 	return tc;
   2598 }
   2599 
   2600 
   2601 /*
   2602  * Calculate the filter constant for the reuqested sampling rate.
   2603  */
   2604 u_int
   2605 ess_srtofc(u_int rate)
   2606 {
   2607 	/*
   2608 	 * The following formula is derived from the information in
   2609 	 * the ES1887 data sheet, based on a roll-off frequency of
   2610 	 * 87%.
   2611 	 */
   2612 	return 256 - 200279L / rate;
   2613 }
   2614 
   2615 
   2616 /*
   2617  * Return the status of the DSP.
   2618  */
   2619 u_char
   2620 ess_get_dsp_status(struct ess_softc *sc)
   2621 {
   2622 	return EREAD1(sc->sc_iot, sc->sc_ioh, ESS_DSP_RW_STATUS);
   2623 }
   2624 
   2625 
   2626 /*
   2627  * Return the read status of the DSP:	1 -> DSP ready for reading
   2628  *					0 -> DSP not ready for reading
   2629  */
   2630 u_char
   2631 ess_dsp_read_ready(struct ess_softc *sc)
   2632 {
   2633 
   2634 	return (ess_get_dsp_status(sc) & ESS_DSP_READ_READY) ? 1 : 0;
   2635 }
   2636 
   2637 
   2638 /*
   2639  * Return the write status of the DSP:	1 -> DSP ready for writing
   2640  *					0 -> DSP not ready for writing
   2641  */
   2642 u_char
   2643 ess_dsp_write_ready(struct ess_softc *sc)
   2644 {
   2645 	return (ess_get_dsp_status(sc) & ESS_DSP_WRITE_BUSY) ? 0 : 1;
   2646 }
   2647 
   2648 
   2649 /*
   2650  * Read a byte from the DSP.
   2651  */
   2652 int
   2653 ess_rdsp(struct ess_softc *sc)
   2654 {
   2655 	bus_space_tag_t iot;
   2656 	bus_space_handle_t ioh;
   2657 	int i;
   2658 
   2659 	iot = sc->sc_iot;
   2660 	ioh = sc->sc_ioh;
   2661 	for (i = ESS_READ_TIMEOUT; i > 0; --i) {
   2662 		if (ess_dsp_read_ready(sc)) {
   2663 			i = EREAD1(iot, ioh, ESS_DSP_READ);
   2664 			DPRINTFN(8,("ess_rdsp() = 0x%02x\n", i));
   2665 			return i;
   2666 		} else
   2667 			delay(10);
   2668 	}
   2669 
   2670 	DPRINTF(("ess_rdsp: timed out\n"));
   2671 	return -1;
   2672 }
   2673 
   2674 /*
   2675  * Write a byte to the DSP.
   2676  */
   2677 int
   2678 ess_wdsp(struct ess_softc *sc, u_char v)
   2679 {
   2680 	bus_space_tag_t iot;
   2681 	bus_space_handle_t ioh;
   2682 	int i;
   2683 
   2684 	DPRINTFN(8,("ess_wdsp(0x%02x)\n", v));
   2685 
   2686 	iot = sc->sc_iot;
   2687 	ioh = sc->sc_ioh;
   2688 	for (i = ESS_WRITE_TIMEOUT; i > 0; --i) {
   2689 		if (ess_dsp_write_ready(sc)) {
   2690 			EWRITE1(iot, ioh, ESS_DSP_WRITE, v);
   2691 			return 0;
   2692 		} else
   2693 			delay(10);
   2694 	}
   2695 
   2696 	DPRINTF(("ess_wdsp(0x%02x): timed out\n", v));
   2697 	return -1;
   2698 }
   2699 
   2700 /*
   2701  * Write a value to one of the ESS extended registers.
   2702  */
   2703 int
   2704 ess_write_x_reg(struct ess_softc *sc, u_char reg, u_char val)
   2705 {
   2706 	int error;
   2707 
   2708 	DPRINTFN(2,("ess_write_x_reg: %02x=%02x\n", reg, val));
   2709 	if ((error = ess_wdsp(sc, reg)) == 0)
   2710 		error = ess_wdsp(sc, val);
   2711 
   2712 	return error;
   2713 }
   2714 
   2715 /*
   2716  * Read the value of one of the ESS extended registers.
   2717  */
   2718 u_char
   2719 ess_read_x_reg(struct ess_softc *sc, u_char reg)
   2720 {
   2721 	int error;
   2722 	int val;
   2723 
   2724 	if ((error = ess_wdsp(sc, 0xC0)) == 0)
   2725 		error = ess_wdsp(sc, reg);
   2726 	if (error) {
   2727 		DPRINTF(("Error reading extended register 0x%02x\n", reg));
   2728 	}
   2729 /* REVISIT: what if an error is returned above? */
   2730 	val = ess_rdsp(sc);
   2731 	DPRINTFN(2,("ess_read_x_reg: %02x=%02x\n", reg, val));
   2732 	return val;
   2733 }
   2734 
   2735 void
   2736 ess_clear_xreg_bits(struct ess_softc *sc, u_char reg, u_char mask)
   2737 {
   2738 	if (ess_write_x_reg(sc, reg, ess_read_x_reg(sc, reg) & ~mask) == -1) {
   2739 		DPRINTF(("Error clearing bits in extended register 0x%02x\n",
   2740 			 reg));
   2741 	}
   2742 }
   2743 
   2744 void
   2745 ess_set_xreg_bits(struct ess_softc *sc, u_char reg, u_char mask)
   2746 {
   2747 	if (ess_write_x_reg(sc, reg, ess_read_x_reg(sc, reg) | mask) == -1) {
   2748 		DPRINTF(("Error setting bits in extended register 0x%02x\n",
   2749 			 reg));
   2750 	}
   2751 }
   2752 
   2753 
   2754 /*
   2755  * Write a value to one of the ESS mixer registers.
   2756  */
   2757 void
   2758 ess_write_mix_reg(struct ess_softc *sc, u_char reg, u_char val)
   2759 {
   2760 	bus_space_tag_t iot;
   2761 	bus_space_handle_t ioh;
   2762 
   2763 	DPRINTFN(2,("ess_write_mix_reg: %x=%x\n", reg, val));
   2764 
   2765 	iot = sc->sc_iot;
   2766 	ioh = sc->sc_ioh;
   2767 	EWRITE1(iot, ioh, ESS_MIX_REG_SELECT, reg);
   2768 	EWRITE1(iot, ioh, ESS_MIX_REG_DATA, val);
   2769 }
   2770 
   2771 /*
   2772  * Read the value of one of the ESS mixer registers.
   2773  */
   2774 u_char
   2775 ess_read_mix_reg(struct ess_softc *sc, u_char reg)
   2776 {
   2777 	bus_space_tag_t iot;
   2778 	bus_space_handle_t ioh;
   2779 	u_char val;
   2780 
   2781 	iot = sc->sc_iot;
   2782 	ioh = sc->sc_ioh;
   2783 	EWRITE1(iot, ioh, ESS_MIX_REG_SELECT, reg);
   2784 	val = EREAD1(iot, ioh, ESS_MIX_REG_DATA);
   2785 
   2786 	DPRINTFN(2,("ess_read_mix_reg: %x=%x\n", reg, val));
   2787 	return val;
   2788 }
   2789 
   2790 void
   2791 ess_clear_mreg_bits(struct ess_softc *sc, u_char reg, u_char mask)
   2792 {
   2793 
   2794 	ess_write_mix_reg(sc, reg, ess_read_mix_reg(sc, reg) & ~mask);
   2795 }
   2796 
   2797 void
   2798 ess_set_mreg_bits(struct ess_softc *sc, u_char reg, u_char mask)
   2799 {
   2800 
   2801 	ess_write_mix_reg(sc, reg, ess_read_mix_reg(sc, reg) | mask);
   2802 }
   2803 
   2804 void
   2805 ess_read_multi_mix_reg(struct ess_softc *sc, u_char reg,
   2806 		       uint8_t *datap, bus_size_t count)
   2807 {
   2808 	bus_space_tag_t iot;
   2809 	bus_space_handle_t ioh;
   2810 
   2811 	iot = sc->sc_iot;
   2812 	ioh = sc->sc_ioh;
   2813 	EWRITE1(iot, ioh, ESS_MIX_REG_SELECT, reg);
   2814 	bus_space_read_multi_1(iot, ioh, ESS_MIX_REG_DATA, datap, count);
   2815 }
   2816