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aica.c revision 1.21 
      1 /*	$NetBSD: aica.c,v 1.21 2011/07/19 15:52:29 dyoung Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2003 SHIMIZU Ryo <ryo (at) misakimix.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  *
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. The name of the author may not be used to endorse or promote products
     17  *    derived from this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: aica.c,v 1.21 2011/07/19 15:52:29 dyoung Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/device.h>
     37 #include <sys/kernel.h>
     38 #include <sys/proc.h>
     39 #include <sys/audioio.h>
     40 #include <sys/bus.h>
     41 
     42 #include <dev/audio_if.h>
     43 #include <dev/mulaw.h>
     44 #include <dev/auconv.h>
     45 
     46 #include <machine/sysasicvar.h>
     47 
     48 #include <dreamcast/dev/g2/g2busvar.h>
     49 #include <dreamcast/dev/g2/aicavar.h>
     50 #include <dreamcast/dev/microcode/aica_armcode.h>
     51 
     52 #define	AICA_REG_ADDR	0x00700000
     53 #define	AICA_RAM_START	0x00800000
     54 #define	AICA_RAM_SIZE	0x00200000
     55 #define	AICA_NCHAN	64
     56 #define	AICA_TIMEOUT	0x1800
     57 
     58 struct aica_softc {
     59 	device_t		sc_dev;		/* base device */
     60 	bus_space_tag_t		sc_memt;
     61 	bus_space_handle_t	sc_aica_regh;
     62 	bus_space_handle_t	sc_aica_memh;
     63 
     64 	/* audio property */
     65 	int			sc_open;
     66 	int			sc_encodings;
     67 	int			sc_precision;
     68 	int			sc_channels;
     69 	int			sc_rate;
     70 	void			(*sc_intr)(void *);
     71 	void			*sc_intr_arg;
     72 
     73 	int			sc_output_master;
     74 	int			sc_output_gain[2];
     75 #define	AICA_VOLUME_LEFT	0
     76 #define	AICA_VOLUME_RIGHT	1
     77 
     78 	/* work for output */
     79 	void			*sc_buffer;
     80 	void			*sc_buffer_start;
     81 	void			*sc_buffer_end;
     82 	int			sc_blksize;
     83 	int			sc_nextfill;
     84 };
     85 
     86 const struct {
     87 	const char *name;
     88 	int	encoding;
     89 	int	precision;
     90 } aica_encodings[] = {
     91 	{AudioEadpcm,		AUDIO_ENCODING_ADPCM,		4},
     92 	{AudioEslinear,		AUDIO_ENCODING_SLINEAR,		8},
     93 	{AudioEulinear,		AUDIO_ENCODING_ULINEAR,		8},
     94 	{AudioEmulaw,		AUDIO_ENCODING_ULAW,		8},
     95 	{AudioEalaw,		AUDIO_ENCODING_ALAW,		8},
     96 	{AudioEslinear_be,	AUDIO_ENCODING_SLINEAR_BE,	16},
     97 	{AudioEslinear_le,	AUDIO_ENCODING_SLINEAR_LE,	16},
     98 	{AudioEulinear_be,	AUDIO_ENCODING_ULINEAR_BE,	16},
     99 	{AudioEulinear_le,	AUDIO_ENCODING_ULINEAR_LE,	16},
    100 };
    101 
    102 #define AICA_NFORMATS	5
    103 static const struct audio_format aica_formats[AICA_NFORMATS] = {
    104 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_ADPCM, 4, 4,
    105 	 1, AUFMT_MONAURAL, 0, {1, 65536}},
    106 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    107 	 1, AUFMT_MONAURAL, 0, {1, 65536}},
    108 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    109 	 2, AUFMT_STEREO, 0, {1, 65536}},
    110 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
    111 	 1, AUFMT_MONAURAL, 0, {1, 65536}},
    112 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
    113 	 2, AUFMT_STEREO, 0, {1, 65536}},
    114 };
    115 
    116 int aica_match(device_t, cfdata_t, void *);
    117 void aica_attach(device_t, device_t, void *);
    118 int aica_print(void *, const char *);
    119 
    120 CFATTACH_DECL_NEW(aica, sizeof(struct aica_softc), aica_match, aica_attach,
    121     NULL, NULL);
    122 
    123 const struct audio_device aica_device = {
    124 	"Dreamcast Sound",
    125 	"",
    126 	"aica"
    127 };
    128 
    129 inline static void aica_g2fifo_wait(void);
    130 void aica_enable(struct aica_softc *);
    131 void aica_disable(struct aica_softc *);
    132 void aica_memwrite(struct aica_softc *, bus_size_t, uint32_t *, int);
    133 void aica_ch2p16write(struct aica_softc *, bus_size_t, uint16_t *, int);
    134 void aica_ch2p8write(struct aica_softc *, bus_size_t, uint8_t *, int);
    135 void aica_command(struct aica_softc *, uint32_t);
    136 void aica_sendparam(struct aica_softc *, uint32_t, int, int);
    137 void aica_play(struct aica_softc *, int, int, int, int);
    138 void aica_fillbuffer(struct aica_softc *);
    139 
    140 /* intr */
    141 int aica_intr(void *);
    142 
    143 /* for audio */
    144 int aica_open(void *, int);
    145 void aica_close(void *);
    146 int aica_query_encoding(void *, struct audio_encoding *);
    147 int aica_set_params(void *, int, int, audio_params_t *,
    148     audio_params_t *, stream_filter_list_t *, stream_filter_list_t *);
    149 int aica_round_blocksize(void *, int, int, const audio_params_t *);
    150 size_t aica_round_buffersize(void *, int, size_t);
    151 int aica_trigger_output(void *, void *, void *, int, void (*)(void *), void *,
    152     const audio_params_t *);
    153 int aica_trigger_input(void *, void *, void *, int, void (*)(void *), void *,
    154     const audio_params_t *);
    155 int aica_halt_output(void *);
    156 int aica_halt_input(void *);
    157 int aica_getdev(void *, struct audio_device *);
    158 int aica_set_port(void *, mixer_ctrl_t *);
    159 int aica_get_port(void *, mixer_ctrl_t *);
    160 int aica_query_devinfo(void *, mixer_devinfo_t *);
    161 void aica_encode(int, int, int, int, u_char *, u_short **);
    162 int aica_get_props(void *);
    163 
    164 const struct audio_hw_if aica_hw_if = {
    165 	aica_open,
    166 	aica_close,
    167 	NULL,				/* aica_drain */
    168 	aica_query_encoding,
    169 	aica_set_params,
    170 	aica_round_blocksize,
    171 	NULL,				/* aica_commit_setting */
    172 	NULL,				/* aica_init_output */
    173 	NULL,				/* aica_init_input */
    174 	NULL,				/* aica_start_output */
    175 	NULL,				/* aica_start_input */
    176 	aica_halt_output,
    177 	aica_halt_input,
    178 	NULL,				/* aica_speaker_ctl */
    179 	aica_getdev,
    180 	NULL,				/* aica_setfd */
    181 	aica_set_port,
    182 	aica_get_port,
    183 	aica_query_devinfo,
    184 	NULL,				/* aica_allocm */
    185 	NULL,				/* aica_freem */
    186 
    187 	aica_round_buffersize,		/* aica_round_buffersize */
    188 
    189 	NULL,				/* aica_mappage */
    190 	aica_get_props,
    191 	aica_trigger_output,
    192 	aica_trigger_input,
    193 	NULL,				/* aica_dev_ioctl */
    194 };
    195 
    196 int
    197 aica_match(device_t parent, cfdata_t cf, void *aux)
    198 {
    199 	static int aica_matched = 0;
    200 
    201 	if (aica_matched)
    202 		return 0;
    203 
    204 	aica_matched = 1;
    205 	return 1;
    206 }
    207 
    208 void
    209 aica_attach(device_t parent, device_t self, void *aux)
    210 {
    211 	struct aica_softc *sc;
    212 	struct g2bus_attach_args *ga;
    213 	int i;
    214 
    215 	sc = device_private(self);
    216 	ga = aux;
    217 	sc->sc_dev = self;
    218 	sc->sc_memt = ga->ga_memt;
    219 
    220 	if (bus_space_map(sc->sc_memt, AICA_REG_ADDR, 0x3000, 0,
    221 	    &sc->sc_aica_regh) != 0) {
    222 		aprint_error(": can't map AICA register space\n");
    223 		return;
    224 	}
    225 
    226 	if (bus_space_map(sc->sc_memt, AICA_RAM_START, AICA_RAM_SIZE, 0,
    227 	    &sc->sc_aica_memh) != 0) {
    228 		aprint_error(": can't map AICA memory space\n");
    229 		return;
    230 	}
    231 
    232 	aprint_normal(": ARM7 Sound Processing Unit\n");
    233 
    234 	aica_disable(sc);
    235 
    236 	for (i = 0; i < AICA_NCHAN; i++)
    237 		bus_space_write_4(sc->sc_memt,sc->sc_aica_regh, i << 7,
    238 		    ((bus_space_read_4(sc->sc_memt, sc->sc_aica_regh, i << 7)
    239 		    & ~0x4000) | 0x8000));
    240 
    241 	/* load microcode, and clear memory */
    242 	bus_space_set_region_4(sc->sc_memt, sc->sc_aica_memh,
    243 	    0, 0, AICA_RAM_SIZE / 4);
    244 
    245 	aica_memwrite(sc, 0, aica_armcode, sizeof(aica_armcode));
    246 
    247 	aica_enable(sc);
    248 
    249 	aprint_normal_dev(self, "interrupting at %s\n",
    250 	    sysasic_intr_string(SYSASIC_IRL9));
    251 	sysasic_intr_establish(SYSASIC_EVENT_AICA, IPL_BIO, SYSASIC_IRL9,
    252 	    aica_intr, sc);
    253 
    254 	audio_attach_mi(&aica_hw_if, sc, self);
    255 
    256 	/* init parameters */
    257 	sc->sc_output_master = 255;
    258 	sc->sc_output_gain[AICA_VOLUME_LEFT]  = 255;
    259 	sc->sc_output_gain[AICA_VOLUME_RIGHT] = 255;
    260 }
    261 
    262 void
    263 aica_enable(struct aica_softc *sc)
    264 {
    265 
    266 	bus_space_write_4(sc->sc_memt, sc->sc_aica_regh, 0x28a8, 24);
    267 	bus_space_write_4(sc->sc_memt, sc->sc_aica_regh, 0x2c00,
    268 	    bus_space_read_4(sc->sc_memt, sc->sc_aica_regh, 0x2c00) & ~1);
    269 }
    270 
    271 void
    272 aica_disable(struct aica_softc *sc)
    273 {
    274 
    275 	bus_space_write_4(sc->sc_memt, sc->sc_aica_regh, 0x2c00,
    276 	    bus_space_read_4(sc->sc_memt, sc->sc_aica_regh, 0x2c00) | 1);
    277 }
    278 
    279 inline static void
    280 aica_g2fifo_wait(void)
    281 {
    282 	int i;
    283 
    284 	i = AICA_TIMEOUT;
    285 	while (--i > 0)
    286 		if ((*(volatile uint32_t *)0xa05f688c) & 0x11)
    287 			break;
    288 }
    289 
    290 void
    291 aica_memwrite(struct aica_softc *sc, bus_size_t offset, uint32_t *src, int len)
    292 {
    293 	int n;
    294 
    295 	KASSERT((offset & 3) == 0);
    296 	n = (len + 3) / 4;	/* uint32_t * n (aligned) */
    297 
    298 	aica_g2fifo_wait();
    299 	bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    300 	    offset, src, n);
    301 }
    302 
    303 void
    304 aica_ch2p16write(struct aica_softc *sc, bus_size_t offset, uint16_t *src,
    305     int len)
    306 {
    307 	union {
    308 		uint32_t w[8];
    309 		uint16_t s[16];
    310 	} buf;
    311 	uint16_t *p;
    312 	int i;
    313 
    314 	KASSERT((offset & 3) == 0);
    315 
    316 	while (len >= 32) {
    317 		p = buf.s;
    318 		*p++ = *src++; src++;
    319 		*p++ = *src++; src++;
    320 		*p++ = *src++; src++;
    321 		*p++ = *src++; src++;
    322 		*p++ = *src++; src++;
    323 		*p++ = *src++; src++;
    324 		*p++ = *src++; src++;
    325 		*p++ = *src++; src++;
    326 		*p++ = *src++; src++;
    327 		*p++ = *src++; src++;
    328 		*p++ = *src++; src++;
    329 		*p++ = *src++; src++;
    330 		*p++ = *src++; src++;
    331 		*p++ = *src++; src++;
    332 		*p++ = *src++; src++;
    333 		*p++ = *src++; src++;
    334 
    335 		aica_g2fifo_wait();
    336 		bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    337 		    offset, buf.w , 32 / 4);
    338 
    339 		offset += sizeof(uint16_t) * 16;
    340 		len -= 32;
    341 	}
    342 
    343 	if (len / 2 > 0) {
    344 		p = buf.s;
    345 		for (i = 0; i < len / 2; i++) {
    346 			*p++ = *src++; src++;
    347 		}
    348 
    349 		aica_g2fifo_wait();
    350 		bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    351 		    offset, buf.w, len / 4);
    352 	}
    353 }
    354 
    355 void
    356 aica_ch2p8write(struct aica_softc *sc, bus_size_t offset, uint8_t *src,
    357     int len)
    358 {
    359 	uint32_t buf[8];
    360 	uint8_t *p;
    361 	int i;
    362 
    363 	KASSERT((offset & 3) == 0);
    364 	while (len >= 32) {
    365 		p = (uint8_t *)buf;
    366 
    367 		*p++ = *src++; src++;
    368 		*p++ = *src++; src++;
    369 		*p++ = *src++; src++;
    370 		*p++ = *src++; src++;
    371 		*p++ = *src++; src++;
    372 		*p++ = *src++; src++;
    373 		*p++ = *src++; src++;
    374 		*p++ = *src++; src++;
    375 		*p++ = *src++; src++;
    376 		*p++ = *src++; src++;
    377 		*p++ = *src++; src++;
    378 		*p++ = *src++; src++;
    379 		*p++ = *src++; src++;
    380 		*p++ = *src++; src++;
    381 		*p++ = *src++; src++;
    382 		*p++ = *src++; src++;
    383 		*p++ = *src++; src++;
    384 		*p++ = *src++; src++;
    385 		*p++ = *src++; src++;
    386 		*p++ = *src++; src++;
    387 		*p++ = *src++; src++;
    388 		*p++ = *src++; src++;
    389 		*p++ = *src++; src++;
    390 		*p++ = *src++; src++;
    391 		*p++ = *src++; src++;
    392 		*p++ = *src++; src++;
    393 		*p++ = *src++; src++;
    394 		*p++ = *src++; src++;
    395 		*p++ = *src++; src++;
    396 		*p++ = *src++; src++;
    397 		*p++ = *src++; src++;
    398 		*p++ = *src++; src++;
    399 
    400 		aica_g2fifo_wait();
    401 		bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    402 		    offset, buf, 32 / 4);
    403 
    404 		offset += 32;
    405 		len -= 32;
    406 	}
    407 
    408 	if (len) {
    409 		p = (uint8_t *)buf;
    410 		for (i = 0; i < len; i++)
    411 			*p++ = *src++; src++;
    412 
    413 		aica_g2fifo_wait();
    414 		bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    415 		    offset, buf, len / 4);
    416 	}
    417 }
    418 
    419 int
    420 aica_open(void *addr, int flags)
    421 {
    422 	struct aica_softc *sc;
    423 
    424 	sc = addr;
    425 	if (sc->sc_open)
    426 		return EBUSY;
    427 
    428 	sc->sc_intr = NULL;
    429 	sc->sc_open = 1;
    430 
    431 	return 0;
    432 }
    433 
    434 void
    435 aica_close(void *addr)
    436 {
    437 	struct aica_softc *sc;
    438 
    439 	sc = addr;
    440 	sc->sc_open = 0;
    441 	sc->sc_intr = NULL;
    442 }
    443 
    444 int
    445 aica_query_encoding(void *addr, struct audio_encoding *fp)
    446 {
    447 	if (fp->index >= sizeof(aica_encodings) / sizeof(aica_encodings[0]))
    448 		return EINVAL;
    449 
    450 	strcpy(fp->name, aica_encodings[fp->index].name);
    451 	fp->encoding = aica_encodings[fp->index].encoding;
    452 	fp->precision = aica_encodings[fp->index].precision;
    453 	fp->flags = 0;
    454 
    455 	return 0;
    456 }
    457 
    458 int
    459 aica_set_params(void *addr, int setmode, int usemode,
    460     audio_params_t *play, audio_params_t *rec,
    461     stream_filter_list_t *pfil, stream_filter_list_t *rfil)
    462 {
    463 	struct aica_softc *sc;
    464 	const audio_params_t *hw;
    465 	int i;
    466 
    467 	i = auconv_set_converter(aica_formats, AICA_NFORMATS,
    468 				 AUMODE_PLAY, play, false, pfil);
    469 	if (i < 0)
    470 		return EINVAL;
    471 	hw = pfil->req_size > 0 ? &pfil->filters[0].param : play;
    472 	sc = addr;
    473 	sc->sc_precision = hw->precision;
    474 	sc->sc_channels = hw->channels;
    475 	sc->sc_rate = hw->sample_rate;
    476 	sc->sc_encodings = hw->encoding;
    477 	return 0;
    478 }
    479 
    480 int
    481 aica_round_blocksize(void *addr, int blk, int mode, const audio_params_t *param)
    482 {
    483 #if 0	/* XXX this has not worked since kent-audio1 merge? */
    484 	struct aica_softc *sc;
    485 
    486 	sc = addr;
    487 	switch (sc->sc_precision) {
    488 	case 4:
    489 		if (sc->sc_channels == 1)
    490 			return AICA_DMABUF_SIZE / 4;
    491 		else
    492 			return AICA_DMABUF_SIZE / 2;
    493 		break;
    494 	case 8:
    495 		if (sc->sc_channels == 1)
    496 			return AICA_DMABUF_SIZE / 2;
    497 		else
    498 			return AICA_DMABUF_SIZE;
    499 		break;
    500 	case 16:
    501 		if (sc->sc_channels == 1)
    502 			return AICA_DMABUF_SIZE;
    503 		else
    504 			return AICA_DMABUF_SIZE * 2;
    505 		break;
    506 	default:
    507 		break;
    508 	}
    509 
    510 #endif
    511 	return AICA_DMABUF_SIZE / 4;
    512 }
    513 
    514 size_t
    515 aica_round_buffersize(void *addr, int dir, size_t bufsize)
    516 {
    517 
    518 	if (dir == AUMODE_PLAY)
    519 		return 65536;
    520 
    521 	return 512;	/* XXX: AUMINBUF */
    522 }
    523 
    524 void
    525 aica_command(struct aica_softc *sc, uint32_t command)
    526 {
    527 
    528 	bus_space_write_4(sc->sc_memt, sc->sc_aica_memh,
    529 	    AICA_ARM_CMD_COMMAND, command);
    530 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh, AICA_ARM_CMD_SERIAL,
    531 	    bus_space_read_4(sc->sc_memt, sc->sc_aica_memh,
    532 	    AICA_ARM_CMD_SERIAL) + 1);
    533 }
    534 
    535 void
    536 aica_sendparam(struct aica_softc *sc, uint32_t command,
    537     int32_t lparam, int32_t rparam)
    538 {
    539 
    540 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    541 	    AICA_ARM_CMD_LPARAM, lparam);
    542 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    543 	    AICA_ARM_CMD_RPARAM, rparam);
    544 
    545 	aica_command(sc, command);
    546 }
    547 
    548 void
    549 aica_play(struct aica_softc *sc, int blksize, int channel, int rate, int prec)
    550 {
    551 
    552 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    553 	    AICA_ARM_CMD_BLOCKSIZE, blksize);
    554 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    555 	    AICA_ARM_CMD_CHANNEL, channel);
    556 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    557 	    AICA_ARM_CMD_RATE, rate);
    558 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    559 	    AICA_ARM_CMD_PRECISION, prec);
    560 
    561 	aica_command(sc, AICA_COMMAND_PLAY);
    562 }
    563 
    564 void
    565 aica_fillbuffer(struct aica_softc *sc)
    566 {
    567 
    568 	if (sc->sc_channels == 2) {
    569 		if (sc->sc_precision == 16) {
    570 			aica_ch2p16write(sc,
    571 			    AICA_DMABUF_LEFT + sc->sc_nextfill,
    572 			    (uint16_t *)sc->sc_buffer + 0, sc->sc_blksize / 2);
    573 			aica_ch2p16write(sc,
    574 			    AICA_DMABUF_RIGHT + sc->sc_nextfill,
    575 			    (uint16_t *)sc->sc_buffer + 1, sc->sc_blksize / 2);
    576 		} else if (sc->sc_precision == 8) {
    577 			aica_ch2p8write(sc, AICA_DMABUF_LEFT + sc->sc_nextfill,
    578 			    (uint8_t *)sc->sc_buffer + 0, sc->sc_blksize / 2);
    579 			aica_ch2p8write(sc, AICA_DMABUF_RIGHT + sc->sc_nextfill,
    580 			    (uint8_t *)sc->sc_buffer + 1, sc->sc_blksize / 2);
    581 		}
    582 	} else {
    583 		aica_memwrite(sc, AICA_DMABUF_MONO + sc->sc_nextfill,
    584 		    sc->sc_buffer, sc->sc_blksize);
    585 	}
    586 
    587 	sc->sc_buffer = (int8_t *)sc->sc_buffer + sc->sc_blksize;
    588 	if (sc->sc_buffer >= sc->sc_buffer_end)
    589 		sc->sc_buffer = sc->sc_buffer_start;
    590 
    591 	sc->sc_nextfill ^= sc->sc_blksize / sc->sc_channels;
    592 }
    593 
    594 int
    595 aica_intr(void *arg)
    596 {
    597 	struct aica_softc *sc;
    598 
    599 	sc = arg;
    600 	aica_fillbuffer(sc);
    601 
    602 	/* call audio interrupt handler (audio_pint()) */
    603 	if (sc->sc_open && sc->sc_intr != NULL) {
    604 		(*(sc->sc_intr))(sc->sc_intr_arg);
    605 	}
    606 
    607 	/* clear SPU interrupt */
    608 	bus_space_write_4(sc->sc_memt, sc->sc_aica_regh, 0x28bc, 0x20);
    609 	return 1;
    610 }
    611 
    612 int
    613 aica_trigger_output(void *addr, void *start, void *end, int blksize,
    614     void (*intr)(void *), void *arg, const audio_params_t *param)
    615 {
    616 	struct aica_softc *sc;
    617 
    618 	sc = addr;
    619 	aica_command(sc, AICA_COMMAND_INIT);
    620 	tsleep(aica_trigger_output, PWAIT, "aicawait", hz / 20);
    621 
    622 	sc->sc_buffer_start = sc->sc_buffer = start;
    623 	sc->sc_buffer_end = end;
    624 	sc->sc_blksize = blksize;
    625 	sc->sc_nextfill = 0;
    626 
    627 	sc->sc_intr = intr;
    628 	sc->sc_intr_arg = arg;
    629 
    630 	/* fill buffers in advance */
    631 	aica_intr(sc);
    632 	aica_intr(sc);
    633 
    634 	/* ...and start playing */
    635 	aica_play(sc, blksize / sc->sc_channels, sc->sc_channels, sc->sc_rate,
    636 	    sc->sc_precision);
    637 
    638 	return 0;
    639 }
    640 
    641 int
    642 aica_trigger_input(void *addr, void *start, void *end, int blksize,
    643     void (*intr)(void *), void *arg, const audio_params_t *param)
    644 {
    645 
    646 	return ENODEV;
    647 }
    648 
    649 int
    650 aica_halt_output(void *addr)
    651 {
    652 	struct aica_softc *sc;
    653 
    654 	sc = addr;
    655 	aica_command(sc, AICA_COMMAND_STOP);
    656 	return 0;
    657 }
    658 
    659 int
    660 aica_halt_input(void *addr)
    661 {
    662 
    663 	return ENODEV;
    664 }
    665 
    666 int
    667 aica_getdev(void *addr, struct audio_device *ret)
    668 {
    669 
    670 	*ret = aica_device;
    671 	return 0;
    672 }
    673 
    674 int
    675 aica_set_port(void *addr, mixer_ctrl_t *mc)
    676 {
    677 	struct aica_softc *sc;
    678 
    679 	sc = addr;
    680 	switch (mc->dev) {
    681 	case AICA_MASTER_VOL:
    682 		sc->sc_output_master =
    683 		    mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] & 0xff;
    684 		aica_sendparam(sc, AICA_COMMAND_MVOL,
    685 		    sc->sc_output_master, sc->sc_output_master);
    686 		break;
    687 	case AICA_OUTPUT_GAIN:
    688 		sc->sc_output_gain[AICA_VOLUME_LEFT] =
    689 		    mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT]  & 0xff;
    690 		sc->sc_output_gain[AICA_VOLUME_RIGHT] =
    691 		    mc->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] & 0xff;
    692 		aica_sendparam(sc, AICA_COMMAND_VOL,
    693 		    sc->sc_output_gain[AICA_VOLUME_LEFT],
    694 		    sc->sc_output_gain[AICA_VOLUME_RIGHT]);
    695 		break;
    696 	default:
    697 		return EINVAL;
    698 	}
    699 
    700 	return 0;
    701 }
    702 
    703 int
    704 aica_get_port(void *addr, mixer_ctrl_t *mc)
    705 {
    706 	struct aica_softc *sc;
    707 
    708 	sc = addr;
    709 	switch (mc->dev) {
    710 	case AICA_MASTER_VOL:
    711 		if (mc->un.value.num_channels != 1)
    712 			return EINVAL;
    713 		mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
    714 		    L16TO256(L256TO16(sc->sc_output_master));
    715 		break;
    716 	case AICA_OUTPUT_GAIN:
    717 		mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
    718 		    sc->sc_output_gain[AICA_VOLUME_LEFT];
    719 		mc->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
    720 		    sc->sc_output_gain[AICA_VOLUME_RIGHT];
    721 		break;
    722 	default:
    723 		return EINVAL;
    724 	}
    725 	return 0;
    726 }
    727 
    728 int
    729 aica_query_devinfo(void *addr, mixer_devinfo_t *md)
    730 {
    731 
    732 	switch (md->index) {
    733 	case AICA_MASTER_VOL:
    734 		md->type = AUDIO_MIXER_VALUE;
    735 		md->mixer_class = AICA_OUTPUT_CLASS;
    736 		md->prev = md->next = AUDIO_MIXER_LAST;
    737 		strcpy(md->label.name, AudioNmaster);
    738 		md->un.v.num_channels = 1;
    739 		strcpy(md->un.v.units.name, AudioNvolume);
    740 		return 0;
    741 	case AICA_OUTPUT_GAIN:
    742 		md->type = AUDIO_MIXER_VALUE;
    743 		md->mixer_class = AICA_OUTPUT_CLASS;
    744 		md->prev = md->next = AUDIO_MIXER_LAST;
    745 		strcpy(md->label.name, AudioNoutput);
    746 		md->un.v.num_channels = 2;
    747 		strcpy(md->label.name, AudioNvolume);
    748 		return 0;
    749 	case AICA_OUTPUT_CLASS:
    750 		md->type = AUDIO_MIXER_CLASS;
    751 		md->mixer_class = AICA_OUTPUT_CLASS;
    752 		md->next = md->prev = AUDIO_MIXER_LAST;
    753 		strcpy(md->label.name, AudioCoutputs);
    754 		return 0;
    755 	}
    756 
    757 	return ENXIO;
    758 }
    759 
    760 int
    761 aica_get_props(void *addr)
    762 {
    763 
    764 	return 0;
    765 }
    766