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aica.c revision 1.22
      1 /*	$NetBSD: aica.c,v 1.22 2011/11/23 23:07:29 jmcneill 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 1.22 2011/11/23 23:07:29 jmcneill 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 	kmutex_t		sc_lock;
     61 	kmutex_t		sc_intr_lock;
     62 	bus_space_tag_t		sc_memt;
     63 	bus_space_handle_t	sc_aica_regh;
     64 	bus_space_handle_t	sc_aica_memh;
     65 
     66 	/* audio property */
     67 	int			sc_open;
     68 	int			sc_encodings;
     69 	int			sc_precision;
     70 	int			sc_channels;
     71 	int			sc_rate;
     72 	void			(*sc_intr)(void *);
     73 	void			*sc_intr_arg;
     74 
     75 	int			sc_output_master;
     76 	int			sc_output_gain[2];
     77 #define	AICA_VOLUME_LEFT	0
     78 #define	AICA_VOLUME_RIGHT	1
     79 
     80 	/* work for output */
     81 	void			*sc_buffer;
     82 	void			*sc_buffer_start;
     83 	void			*sc_buffer_end;
     84 	int			sc_blksize;
     85 	int			sc_nextfill;
     86 };
     87 
     88 const struct {
     89 	const char *name;
     90 	int	encoding;
     91 	int	precision;
     92 } aica_encodings[] = {
     93 	{AudioEadpcm,		AUDIO_ENCODING_ADPCM,		4},
     94 	{AudioEslinear,		AUDIO_ENCODING_SLINEAR,		8},
     95 	{AudioEulinear,		AUDIO_ENCODING_ULINEAR,		8},
     96 	{AudioEmulaw,		AUDIO_ENCODING_ULAW,		8},
     97 	{AudioEalaw,		AUDIO_ENCODING_ALAW,		8},
     98 	{AudioEslinear_be,	AUDIO_ENCODING_SLINEAR_BE,	16},
     99 	{AudioEslinear_le,	AUDIO_ENCODING_SLINEAR_LE,	16},
    100 	{AudioEulinear_be,	AUDIO_ENCODING_ULINEAR_BE,	16},
    101 	{AudioEulinear_le,	AUDIO_ENCODING_ULINEAR_LE,	16},
    102 };
    103 
    104 #define AICA_NFORMATS	5
    105 static const struct audio_format aica_formats[AICA_NFORMATS] = {
    106 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_ADPCM, 4, 4,
    107 	 1, AUFMT_MONAURAL, 0, {1, 65536}},
    108 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    109 	 1, AUFMT_MONAURAL, 0, {1, 65536}},
    110 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    111 	 2, AUFMT_STEREO, 0, {1, 65536}},
    112 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
    113 	 1, AUFMT_MONAURAL, 0, {1, 65536}},
    114 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
    115 	 2, AUFMT_STEREO, 0, {1, 65536}},
    116 };
    117 
    118 int aica_match(device_t, cfdata_t, void *);
    119 void aica_attach(device_t, device_t, void *);
    120 int aica_print(void *, const char *);
    121 
    122 CFATTACH_DECL_NEW(aica, sizeof(struct aica_softc), aica_match, aica_attach,
    123     NULL, NULL);
    124 
    125 const struct audio_device aica_device = {
    126 	"Dreamcast Sound",
    127 	"",
    128 	"aica"
    129 };
    130 
    131 inline static void aica_g2fifo_wait(void);
    132 void aica_enable(struct aica_softc *);
    133 void aica_disable(struct aica_softc *);
    134 void aica_memwrite(struct aica_softc *, bus_size_t, uint32_t *, int);
    135 void aica_ch2p16write(struct aica_softc *, bus_size_t, uint16_t *, int);
    136 void aica_ch2p8write(struct aica_softc *, bus_size_t, uint8_t *, int);
    137 void aica_command(struct aica_softc *, uint32_t);
    138 void aica_sendparam(struct aica_softc *, uint32_t, int, int);
    139 void aica_play(struct aica_softc *, int, int, int, int);
    140 void aica_fillbuffer(struct aica_softc *);
    141 
    142 /* intr */
    143 int aica_intr(void *);
    144 
    145 /* for audio */
    146 int aica_open(void *, int);
    147 void aica_close(void *);
    148 int aica_query_encoding(void *, struct audio_encoding *);
    149 int aica_set_params(void *, int, int, audio_params_t *,
    150     audio_params_t *, stream_filter_list_t *, stream_filter_list_t *);
    151 int aica_round_blocksize(void *, int, int, const audio_params_t *);
    152 size_t aica_round_buffersize(void *, int, size_t);
    153 int aica_trigger_output(void *, void *, void *, int, void (*)(void *), void *,
    154     const audio_params_t *);
    155 int aica_trigger_input(void *, void *, void *, int, void (*)(void *), void *,
    156     const audio_params_t *);
    157 int aica_halt_output(void *);
    158 int aica_halt_input(void *);
    159 int aica_getdev(void *, struct audio_device *);
    160 int aica_set_port(void *, mixer_ctrl_t *);
    161 int aica_get_port(void *, mixer_ctrl_t *);
    162 int aica_query_devinfo(void *, mixer_devinfo_t *);
    163 void aica_encode(int, int, int, int, u_char *, u_short **);
    164 int aica_get_props(void *);
    165 void aica_get_locks(void *, kmutex_t **, kmutex_t **);
    166 
    167 const struct audio_hw_if aica_hw_if = {
    168 	aica_open,
    169 	aica_close,
    170 	NULL,				/* aica_drain */
    171 	aica_query_encoding,
    172 	aica_set_params,
    173 	aica_round_blocksize,
    174 	NULL,				/* aica_commit_setting */
    175 	NULL,				/* aica_init_output */
    176 	NULL,				/* aica_init_input */
    177 	NULL,				/* aica_start_output */
    178 	NULL,				/* aica_start_input */
    179 	aica_halt_output,
    180 	aica_halt_input,
    181 	NULL,				/* aica_speaker_ctl */
    182 	aica_getdev,
    183 	NULL,				/* aica_setfd */
    184 	aica_set_port,
    185 	aica_get_port,
    186 	aica_query_devinfo,
    187 	NULL,				/* aica_allocm */
    188 	NULL,				/* aica_freem */
    189 
    190 	aica_round_buffersize,		/* aica_round_buffersize */
    191 
    192 	NULL,				/* aica_mappage */
    193 	aica_get_props,
    194 	aica_trigger_output,
    195 	aica_trigger_input,
    196 	NULL,				/* aica_dev_ioctl */
    197 	aica_get_locks,
    198 };
    199 
    200 int
    201 aica_match(device_t parent, cfdata_t cf, void *aux)
    202 {
    203 	static int aica_matched = 0;
    204 
    205 	if (aica_matched)
    206 		return 0;
    207 
    208 	aica_matched = 1;
    209 	return 1;
    210 }
    211 
    212 void
    213 aica_attach(device_t parent, device_t self, void *aux)
    214 {
    215 	struct aica_softc *sc;
    216 	struct g2bus_attach_args *ga;
    217 	int i;
    218 
    219 	sc = device_private(self);
    220 	ga = aux;
    221 	sc->sc_dev = self;
    222 	sc->sc_memt = ga->ga_memt;
    223 
    224 	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
    225 	mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_SCHED);
    226 
    227 	if (bus_space_map(sc->sc_memt, AICA_REG_ADDR, 0x3000, 0,
    228 	    &sc->sc_aica_regh) != 0) {
    229 		aprint_error(": can't map AICA register space\n");
    230 		return;
    231 	}
    232 
    233 	if (bus_space_map(sc->sc_memt, AICA_RAM_START, AICA_RAM_SIZE, 0,
    234 	    &sc->sc_aica_memh) != 0) {
    235 		aprint_error(": can't map AICA memory space\n");
    236 		return;
    237 	}
    238 
    239 	aprint_normal(": ARM7 Sound Processing Unit\n");
    240 
    241 	aica_disable(sc);
    242 
    243 	for (i = 0; i < AICA_NCHAN; i++)
    244 		bus_space_write_4(sc->sc_memt,sc->sc_aica_regh, i << 7,
    245 		    ((bus_space_read_4(sc->sc_memt, sc->sc_aica_regh, i << 7)
    246 		    & ~0x4000) | 0x8000));
    247 
    248 	/* load microcode, and clear memory */
    249 	bus_space_set_region_4(sc->sc_memt, sc->sc_aica_memh,
    250 	    0, 0, AICA_RAM_SIZE / 4);
    251 
    252 	aica_memwrite(sc, 0, aica_armcode, sizeof(aica_armcode));
    253 
    254 	aica_enable(sc);
    255 
    256 	aprint_normal_dev(self, "interrupting at %s\n",
    257 	    sysasic_intr_string(SYSASIC_IRL9));
    258 	sysasic_intr_establish(SYSASIC_EVENT_AICA, IPL_BIO, SYSASIC_IRL9,
    259 	    aica_intr, sc);
    260 
    261 	audio_attach_mi(&aica_hw_if, sc, self);
    262 
    263 	/* init parameters */
    264 	sc->sc_output_master = 255;
    265 	sc->sc_output_gain[AICA_VOLUME_LEFT]  = 255;
    266 	sc->sc_output_gain[AICA_VOLUME_RIGHT] = 255;
    267 }
    268 
    269 void
    270 aica_enable(struct aica_softc *sc)
    271 {
    272 
    273 	bus_space_write_4(sc->sc_memt, sc->sc_aica_regh, 0x28a8, 24);
    274 	bus_space_write_4(sc->sc_memt, sc->sc_aica_regh, 0x2c00,
    275 	    bus_space_read_4(sc->sc_memt, sc->sc_aica_regh, 0x2c00) & ~1);
    276 }
    277 
    278 void
    279 aica_disable(struct aica_softc *sc)
    280 {
    281 
    282 	bus_space_write_4(sc->sc_memt, sc->sc_aica_regh, 0x2c00,
    283 	    bus_space_read_4(sc->sc_memt, sc->sc_aica_regh, 0x2c00) | 1);
    284 }
    285 
    286 inline static void
    287 aica_g2fifo_wait(void)
    288 {
    289 	int i;
    290 
    291 	i = AICA_TIMEOUT;
    292 	while (--i > 0)
    293 		if ((*(volatile uint32_t *)0xa05f688c) & 0x11)
    294 			break;
    295 }
    296 
    297 void
    298 aica_memwrite(struct aica_softc *sc, bus_size_t offset, uint32_t *src, int len)
    299 {
    300 	int n;
    301 
    302 	KASSERT((offset & 3) == 0);
    303 	n = (len + 3) / 4;	/* uint32_t * n (aligned) */
    304 
    305 	aica_g2fifo_wait();
    306 	bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    307 	    offset, src, n);
    308 }
    309 
    310 void
    311 aica_ch2p16write(struct aica_softc *sc, bus_size_t offset, uint16_t *src,
    312     int len)
    313 {
    314 	union {
    315 		uint32_t w[8];
    316 		uint16_t s[16];
    317 	} buf;
    318 	uint16_t *p;
    319 	int i;
    320 
    321 	KASSERT((offset & 3) == 0);
    322 
    323 	while (len >= 32) {
    324 		p = buf.s;
    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 		*p++ = *src++; src++;
    335 		*p++ = *src++; src++;
    336 		*p++ = *src++; src++;
    337 		*p++ = *src++; src++;
    338 		*p++ = *src++; src++;
    339 		*p++ = *src++; src++;
    340 		*p++ = *src++; src++;
    341 
    342 		aica_g2fifo_wait();
    343 		bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    344 		    offset, buf.w , 32 / 4);
    345 
    346 		offset += sizeof(uint16_t) * 16;
    347 		len -= 32;
    348 	}
    349 
    350 	if (len / 2 > 0) {
    351 		p = buf.s;
    352 		for (i = 0; i < len / 2; i++) {
    353 			*p++ = *src++; src++;
    354 		}
    355 
    356 		aica_g2fifo_wait();
    357 		bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    358 		    offset, buf.w, len / 4);
    359 	}
    360 }
    361 
    362 void
    363 aica_ch2p8write(struct aica_softc *sc, bus_size_t offset, uint8_t *src,
    364     int len)
    365 {
    366 	uint32_t buf[8];
    367 	uint8_t *p;
    368 	int i;
    369 
    370 	KASSERT((offset & 3) == 0);
    371 	while (len >= 32) {
    372 		p = (uint8_t *)buf;
    373 
    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 		*p++ = *src++; src++;
    400 		*p++ = *src++; src++;
    401 		*p++ = *src++; src++;
    402 		*p++ = *src++; src++;
    403 		*p++ = *src++; src++;
    404 		*p++ = *src++; src++;
    405 		*p++ = *src++; src++;
    406 
    407 		aica_g2fifo_wait();
    408 		bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    409 		    offset, buf, 32 / 4);
    410 
    411 		offset += 32;
    412 		len -= 32;
    413 	}
    414 
    415 	if (len) {
    416 		p = (uint8_t *)buf;
    417 		for (i = 0; i < len; i++)
    418 			*p++ = *src++; src++;
    419 
    420 		aica_g2fifo_wait();
    421 		bus_space_write_region_4(sc->sc_memt, sc->sc_aica_memh,
    422 		    offset, buf, len / 4);
    423 	}
    424 }
    425 
    426 int
    427 aica_open(void *addr, int flags)
    428 {
    429 	struct aica_softc *sc;
    430 
    431 	sc = addr;
    432 	if (sc->sc_open)
    433 		return EBUSY;
    434 
    435 	sc->sc_intr = NULL;
    436 	sc->sc_open = 1;
    437 
    438 	return 0;
    439 }
    440 
    441 void
    442 aica_close(void *addr)
    443 {
    444 	struct aica_softc *sc;
    445 
    446 	sc = addr;
    447 	sc->sc_open = 0;
    448 	sc->sc_intr = NULL;
    449 }
    450 
    451 int
    452 aica_query_encoding(void *addr, struct audio_encoding *fp)
    453 {
    454 	if (fp->index >= sizeof(aica_encodings) / sizeof(aica_encodings[0]))
    455 		return EINVAL;
    456 
    457 	strcpy(fp->name, aica_encodings[fp->index].name);
    458 	fp->encoding = aica_encodings[fp->index].encoding;
    459 	fp->precision = aica_encodings[fp->index].precision;
    460 	fp->flags = 0;
    461 
    462 	return 0;
    463 }
    464 
    465 int
    466 aica_set_params(void *addr, int setmode, int usemode,
    467     audio_params_t *play, audio_params_t *rec,
    468     stream_filter_list_t *pfil, stream_filter_list_t *rfil)
    469 {
    470 	struct aica_softc *sc;
    471 	const audio_params_t *hw;
    472 	int i;
    473 
    474 	i = auconv_set_converter(aica_formats, AICA_NFORMATS,
    475 				 AUMODE_PLAY, play, false, pfil);
    476 	if (i < 0)
    477 		return EINVAL;
    478 	hw = pfil->req_size > 0 ? &pfil->filters[0].param : play;
    479 	sc = addr;
    480 	sc->sc_precision = hw->precision;
    481 	sc->sc_channels = hw->channels;
    482 	sc->sc_rate = hw->sample_rate;
    483 	sc->sc_encodings = hw->encoding;
    484 	return 0;
    485 }
    486 
    487 int
    488 aica_round_blocksize(void *addr, int blk, int mode, const audio_params_t *param)
    489 {
    490 #if 0	/* XXX this has not worked since kent-audio1 merge? */
    491 	struct aica_softc *sc;
    492 
    493 	sc = addr;
    494 	switch (sc->sc_precision) {
    495 	case 4:
    496 		if (sc->sc_channels == 1)
    497 			return AICA_DMABUF_SIZE / 4;
    498 		else
    499 			return AICA_DMABUF_SIZE / 2;
    500 		break;
    501 	case 8:
    502 		if (sc->sc_channels == 1)
    503 			return AICA_DMABUF_SIZE / 2;
    504 		else
    505 			return AICA_DMABUF_SIZE;
    506 		break;
    507 	case 16:
    508 		if (sc->sc_channels == 1)
    509 			return AICA_DMABUF_SIZE;
    510 		else
    511 			return AICA_DMABUF_SIZE * 2;
    512 		break;
    513 	default:
    514 		break;
    515 	}
    516 
    517 #endif
    518 	return AICA_DMABUF_SIZE / 4;
    519 }
    520 
    521 size_t
    522 aica_round_buffersize(void *addr, int dir, size_t bufsize)
    523 {
    524 
    525 	if (dir == AUMODE_PLAY)
    526 		return 65536;
    527 
    528 	return 512;	/* XXX: AUMINBUF */
    529 }
    530 
    531 void
    532 aica_command(struct aica_softc *sc, uint32_t command)
    533 {
    534 
    535 	bus_space_write_4(sc->sc_memt, sc->sc_aica_memh,
    536 	    AICA_ARM_CMD_COMMAND, command);
    537 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh, AICA_ARM_CMD_SERIAL,
    538 	    bus_space_read_4(sc->sc_memt, sc->sc_aica_memh,
    539 	    AICA_ARM_CMD_SERIAL) + 1);
    540 }
    541 
    542 void
    543 aica_sendparam(struct aica_softc *sc, uint32_t command,
    544     int32_t lparam, int32_t rparam)
    545 {
    546 
    547 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    548 	    AICA_ARM_CMD_LPARAM, lparam);
    549 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    550 	    AICA_ARM_CMD_RPARAM, rparam);
    551 
    552 	aica_command(sc, command);
    553 }
    554 
    555 void
    556 aica_play(struct aica_softc *sc, int blksize, int channel, int rate, int prec)
    557 {
    558 
    559 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    560 	    AICA_ARM_CMD_BLOCKSIZE, blksize);
    561 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    562 	    AICA_ARM_CMD_CHANNEL, channel);
    563 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    564 	    AICA_ARM_CMD_RATE, rate);
    565 	bus_space_write_4(sc->sc_memt,sc->sc_aica_memh,
    566 	    AICA_ARM_CMD_PRECISION, prec);
    567 
    568 	aica_command(sc, AICA_COMMAND_PLAY);
    569 }
    570 
    571 void
    572 aica_fillbuffer(struct aica_softc *sc)
    573 {
    574 
    575 	if (sc->sc_channels == 2) {
    576 		if (sc->sc_precision == 16) {
    577 			aica_ch2p16write(sc,
    578 			    AICA_DMABUF_LEFT + sc->sc_nextfill,
    579 			    (uint16_t *)sc->sc_buffer + 0, sc->sc_blksize / 2);
    580 			aica_ch2p16write(sc,
    581 			    AICA_DMABUF_RIGHT + sc->sc_nextfill,
    582 			    (uint16_t *)sc->sc_buffer + 1, sc->sc_blksize / 2);
    583 		} else if (sc->sc_precision == 8) {
    584 			aica_ch2p8write(sc, AICA_DMABUF_LEFT + sc->sc_nextfill,
    585 			    (uint8_t *)sc->sc_buffer + 0, sc->sc_blksize / 2);
    586 			aica_ch2p8write(sc, AICA_DMABUF_RIGHT + sc->sc_nextfill,
    587 			    (uint8_t *)sc->sc_buffer + 1, sc->sc_blksize / 2);
    588 		}
    589 	} else {
    590 		aica_memwrite(sc, AICA_DMABUF_MONO + sc->sc_nextfill,
    591 		    sc->sc_buffer, sc->sc_blksize);
    592 	}
    593 
    594 	sc->sc_buffer = (int8_t *)sc->sc_buffer + sc->sc_blksize;
    595 	if (sc->sc_buffer >= sc->sc_buffer_end)
    596 		sc->sc_buffer = sc->sc_buffer_start;
    597 
    598 	sc->sc_nextfill ^= sc->sc_blksize / sc->sc_channels;
    599 }
    600 
    601 int
    602 aica_intr(void *arg)
    603 {
    604 	struct aica_softc *sc;
    605 
    606 	sc = arg;
    607 
    608 	mutex_spin_enter(&sc->sc_intr_lock);
    609 
    610 	aica_fillbuffer(sc);
    611 
    612 	/* call audio interrupt handler (audio_pint()) */
    613 	if (sc->sc_open && sc->sc_intr != NULL) {
    614 		(*(sc->sc_intr))(sc->sc_intr_arg);
    615 	}
    616 
    617 	/* clear SPU interrupt */
    618 	bus_space_write_4(sc->sc_memt, sc->sc_aica_regh, 0x28bc, 0x20);
    619 
    620 	mutex_spin_exit(&sc->sc_intr_lock);
    621 
    622 	return 1;
    623 }
    624 
    625 int
    626 aica_trigger_output(void *addr, void *start, void *end, int blksize,
    627     void (*intr)(void *), void *arg, const audio_params_t *param)
    628 {
    629 	struct aica_softc *sc;
    630 
    631 	sc = addr;
    632 	aica_command(sc, AICA_COMMAND_INIT);
    633 	tsleep(aica_trigger_output, PWAIT, "aicawait", hz / 20);
    634 
    635 	sc->sc_buffer_start = sc->sc_buffer = start;
    636 	sc->sc_buffer_end = end;
    637 	sc->sc_blksize = blksize;
    638 	sc->sc_nextfill = 0;
    639 
    640 	sc->sc_intr = intr;
    641 	sc->sc_intr_arg = arg;
    642 
    643 	/* fill buffers in advance */
    644 	aica_intr(sc);
    645 	aica_intr(sc);
    646 
    647 	/* ...and start playing */
    648 	aica_play(sc, blksize / sc->sc_channels, sc->sc_channels, sc->sc_rate,
    649 	    sc->sc_precision);
    650 
    651 	return 0;
    652 }
    653 
    654 int
    655 aica_trigger_input(void *addr, void *start, void *end, int blksize,
    656     void (*intr)(void *), void *arg, const audio_params_t *param)
    657 {
    658 
    659 	return ENODEV;
    660 }
    661 
    662 int
    663 aica_halt_output(void *addr)
    664 {
    665 	struct aica_softc *sc;
    666 
    667 	sc = addr;
    668 	aica_command(sc, AICA_COMMAND_STOP);
    669 	return 0;
    670 }
    671 
    672 int
    673 aica_halt_input(void *addr)
    674 {
    675 
    676 	return ENODEV;
    677 }
    678 
    679 int
    680 aica_getdev(void *addr, struct audio_device *ret)
    681 {
    682 
    683 	*ret = aica_device;
    684 	return 0;
    685 }
    686 
    687 int
    688 aica_set_port(void *addr, mixer_ctrl_t *mc)
    689 {
    690 	struct aica_softc *sc;
    691 
    692 	sc = addr;
    693 	switch (mc->dev) {
    694 	case AICA_MASTER_VOL:
    695 		sc->sc_output_master =
    696 		    mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] & 0xff;
    697 		aica_sendparam(sc, AICA_COMMAND_MVOL,
    698 		    sc->sc_output_master, sc->sc_output_master);
    699 		break;
    700 	case AICA_OUTPUT_GAIN:
    701 		sc->sc_output_gain[AICA_VOLUME_LEFT] =
    702 		    mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT]  & 0xff;
    703 		sc->sc_output_gain[AICA_VOLUME_RIGHT] =
    704 		    mc->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] & 0xff;
    705 		aica_sendparam(sc, AICA_COMMAND_VOL,
    706 		    sc->sc_output_gain[AICA_VOLUME_LEFT],
    707 		    sc->sc_output_gain[AICA_VOLUME_RIGHT]);
    708 		break;
    709 	default:
    710 		return EINVAL;
    711 	}
    712 
    713 	return 0;
    714 }
    715 
    716 int
    717 aica_get_port(void *addr, mixer_ctrl_t *mc)
    718 {
    719 	struct aica_softc *sc;
    720 
    721 	sc = addr;
    722 	switch (mc->dev) {
    723 	case AICA_MASTER_VOL:
    724 		if (mc->un.value.num_channels != 1)
    725 			return EINVAL;
    726 		mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
    727 		    L16TO256(L256TO16(sc->sc_output_master));
    728 		break;
    729 	case AICA_OUTPUT_GAIN:
    730 		mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
    731 		    sc->sc_output_gain[AICA_VOLUME_LEFT];
    732 		mc->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
    733 		    sc->sc_output_gain[AICA_VOLUME_RIGHT];
    734 		break;
    735 	default:
    736 		return EINVAL;
    737 	}
    738 	return 0;
    739 }
    740 
    741 int
    742 aica_query_devinfo(void *addr, mixer_devinfo_t *md)
    743 {
    744 
    745 	switch (md->index) {
    746 	case AICA_MASTER_VOL:
    747 		md->type = AUDIO_MIXER_VALUE;
    748 		md->mixer_class = AICA_OUTPUT_CLASS;
    749 		md->prev = md->next = AUDIO_MIXER_LAST;
    750 		strcpy(md->label.name, AudioNmaster);
    751 		md->un.v.num_channels = 1;
    752 		strcpy(md->un.v.units.name, AudioNvolume);
    753 		return 0;
    754 	case AICA_OUTPUT_GAIN:
    755 		md->type = AUDIO_MIXER_VALUE;
    756 		md->mixer_class = AICA_OUTPUT_CLASS;
    757 		md->prev = md->next = AUDIO_MIXER_LAST;
    758 		strcpy(md->label.name, AudioNoutput);
    759 		md->un.v.num_channels = 2;
    760 		strcpy(md->label.name, AudioNvolume);
    761 		return 0;
    762 	case AICA_OUTPUT_CLASS:
    763 		md->type = AUDIO_MIXER_CLASS;
    764 		md->mixer_class = AICA_OUTPUT_CLASS;
    765 		md->next = md->prev = AUDIO_MIXER_LAST;
    766 		strcpy(md->label.name, AudioCoutputs);
    767 		return 0;
    768 	}
    769 
    770 	return ENXIO;
    771 }
    772 
    773 int
    774 aica_get_props(void *addr)
    775 {
    776 
    777 	return 0;
    778 }
    779 
    780 void
    781 aica_get_locks(void *addr, kmutex_t **intr, kmutex_t **thread)
    782 {
    783 	struct aica_softc *sc;
    784 
    785 	sc = addr;
    786 	*intr = &sc->sc_intr_lock;
    787 	*thread = &sc->sc_lock;
    788 }
    789