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gcscaudio.c revision 1.5
      1 /*	$NetBSD: gcscaudio.c,v 1.5 2010/02/24 22:38:00 dyoung Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 SHIMIZU Ryo <ryo (at) nerv.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  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: gcscaudio.c,v 1.5 2010/02/24 22:38:00 dyoung Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/malloc.h>
     35 #include <sys/device.h>
     36 #include <sys/queue.h>
     37 
     38 #include <uvm/uvm_extern.h>
     39 
     40 #include <dev/pci/pcidevs.h>
     41 #include <dev/pci/pcivar.h>
     42 
     43 #include <sys/audioio.h>
     44 #include <dev/audio_if.h>
     45 #include <dev/mulaw.h>
     46 #include <dev/auconv.h>
     47 #include <dev/ic/ac97reg.h>
     48 #include <dev/ic/ac97var.h>
     49 
     50 #include <dev/pci/gcscaudioreg.h>
     51 
     52 
     53 #define	GCSCAUDIO_NPRDTABLE	256	/* including a JMP-PRD for loop */
     54 #define	GCSCAUDIO_PRD_SIZE_MAX	65532	/* limited by CS5536 Controller */
     55 #define	GCSCAUDIO_BUFSIZE_MAX	(GCSCAUDIO_PRD_SIZE_MAX * (GCSCAUDIO_NPRDTABLE - 1))
     56 
     57 struct gcscaudio_prd {
     58 	/* PRD table for play/rec */
     59 	struct gcscaudio_prdtables {
     60 #define	PRD_TABLE_FRONT		0
     61 #define	PRD_TABLE_SURR		1
     62 #define	PRD_TABLE_CENTER	2
     63 #define	PRD_TABLE_LFE		3
     64 #define	PRD_TABLE_REC		4
     65 #define	PRD_TABLE_MAX		5
     66 		struct acc_prd prdtbl[PRD_TABLE_MAX][GCSCAUDIO_NPRDTABLE];
     67 	} *p_prdtables;
     68 	bus_dmamap_t p_prdmap;
     69 	bus_dma_segment_t p_prdsegs[1];
     70 	int p_prdnseg;
     71 };
     72 
     73 struct gcscaudio_dma {
     74 	LIST_ENTRY(gcscaudio_dma) list;
     75 	bus_dmamap_t map;
     76 	void *addr;
     77 	size_t size;
     78 	bus_dma_segment_t segs[1];
     79 	int nseg;
     80 };
     81 
     82 struct gcscaudio_softc_ch {
     83 	void (*ch_intr)(void *);
     84 	void *ch_intr_arg;
     85 	struct audio_params ch_params;
     86 };
     87 
     88 struct gcscaudio_softc {
     89 	struct device sc_dev;
     90 	pci_chipset_tag_t sc_pc;
     91 	pcitag_t sc_pt;
     92 	void *sc_ih;
     93 	bus_space_tag_t sc_iot;
     94 	bus_space_handle_t sc_ioh;
     95 	bus_size_t sc_ios;
     96 	bus_dma_tag_t sc_dmat;
     97 
     98 	/* allocated DMA buffer list */
     99 	LIST_HEAD(, gcscaudio_dma) sc_dmalist;
    100 
    101 #define GCSCAUDIO_MAXFORMATS	4
    102 	struct audio_format sc_formats[GCSCAUDIO_MAXFORMATS];
    103 	int sc_nformats;
    104 	struct audio_encoding_set *sc_encodings;
    105 
    106 	/* AC97 codec */
    107 	struct ac97_host_if host_if;
    108 	struct ac97_codec_if *codec_if;
    109 
    110 	/* input, output channels */
    111 	struct gcscaudio_softc_ch sc_play;
    112 	struct gcscaudio_softc_ch sc_rec;
    113 	struct gcscaudio_prd sc_prd;
    114 
    115 	/* multi channel splitter work; {4,6}ch stream to {2,4} DMA buffers */
    116 	void *sc_mch_split_buf;
    117 	void *sc_mch_split_start;
    118 	int sc_mch_split_off;
    119 	int sc_mch_split_size;
    120 	int sc_mch_split_blksize;
    121 	void (*sc_mch_splitter)(void *, void *, int, int);
    122 	bool sc_spdif;
    123 };
    124 
    125 /* for cfattach */
    126 static int gcscaudio_match(device_t, cfdata_t, void *);
    127 static void gcscaudio_attach(device_t, device_t, void *);
    128 
    129 /* for audio_hw_if */
    130 static int gcscaudio_open(void *, int);
    131 static void gcscaudio_close(void *);
    132 static int gcscaudio_query_encoding(void *, struct audio_encoding *);
    133 static int gcscaudio_set_params(void *, int, int, audio_params_t *,
    134                                 audio_params_t *, stream_filter_list_t *,
    135                                 stream_filter_list_t *);
    136 static int gcscaudio_round_blocksize(void *, int, int, const audio_params_t *);
    137 static int gcscaudio_halt_output(void *);
    138 static int gcscaudio_halt_input(void *);
    139 static int gcscaudio_getdev(void *, struct audio_device *);
    140 static int gcscaudio_set_port(void *, mixer_ctrl_t *);
    141 static int gcscaudio_get_port(void *, mixer_ctrl_t *);
    142 static int gcscaudio_query_devinfo(void *, mixer_devinfo_t *);
    143 static void *gcscaudio_malloc(void *, int, size_t, struct malloc_type *, int);
    144 static void gcscaudio_free(void *, void *, struct malloc_type *);
    145 static size_t gcscaudio_round_buffersize(void *, int, size_t);
    146 static paddr_t gcscaudio_mappage(void *, void *, off_t, int);
    147 static int gcscaudio_get_props(void *);
    148 static int gcscaudio_trigger_output(void *, void *, void *, int,
    149                                     void (*)(void *), void *,
    150                                     const audio_params_t *);
    151 static int gcscaudio_trigger_input(void *, void *, void *, int,
    152                                    void (*)(void *), void *,
    153                                    const audio_params_t *);
    154 static bool gcscaudio_resume(device_t, const pmf_qual_t *);
    155 static int gcscaudio_intr(void *);
    156 
    157 /* for codec_if */
    158 static int gcscaudio_attach_codec(void *, struct ac97_codec_if *);
    159 static int gcscaudio_write_codec(void *, uint8_t, uint16_t);
    160 static int gcscaudio_read_codec(void *, uint8_t, uint16_t *);
    161 static int gcscaudio_reset_codec(void *);
    162 static void gcscaudio_spdif_event_codec(void *, bool);
    163 
    164 /* misc */
    165 static int gcscaudio_append_formats(struct gcscaudio_softc *,
    166                                     const struct audio_format *);
    167 static int gcscaudio_wait_ready_codec(struct gcscaudio_softc *sc, const char *);
    168 static int gcscaudio_set_params_ch(struct gcscaudio_softc *,
    169                                    struct gcscaudio_softc_ch *, int,
    170                                    audio_params_t *, stream_filter_list_t *);
    171 static int gcscaudio_allocate_dma(struct gcscaudio_softc *, size_t, void **,
    172                                   bus_dma_segment_t *, int, int *,
    173                                   int, bus_dmamap_t *);
    174 
    175 
    176 CFATTACH_DECL(gcscaudio, sizeof (struct gcscaudio_softc),
    177     gcscaudio_match, gcscaudio_attach, NULL, NULL);
    178 
    179 
    180 static struct audio_device gcscaudio_device = {
    181 	"AMD Geode CS5536",
    182 	"",
    183 	"gcscaudio"
    184 };
    185 
    186 static const struct audio_hw_if gcscaudio_hw_if = {
    187 	.open			= gcscaudio_open,
    188 	.close			= gcscaudio_close,
    189 	.drain			= NULL,
    190 	.query_encoding		= gcscaudio_query_encoding,
    191 	.set_params		= gcscaudio_set_params,
    192 	.round_blocksize	= gcscaudio_round_blocksize,
    193 	.commit_settings	= NULL,
    194 	.init_output		= NULL,
    195 	.init_input		= NULL,
    196 	.start_output		= NULL,
    197 	.start_input		= NULL,
    198 	.halt_output		= gcscaudio_halt_output,
    199 	.halt_input		= gcscaudio_halt_input,
    200 	.speaker_ctl		= NULL,
    201 	.getdev			= gcscaudio_getdev,
    202 	.setfd			= NULL,
    203 	.set_port		= gcscaudio_set_port,
    204 	.get_port		= gcscaudio_get_port,
    205 	.query_devinfo		= gcscaudio_query_devinfo,
    206 	.allocm			= gcscaudio_malloc,
    207 	.freem			= gcscaudio_free,
    208 	.round_buffersize	= gcscaudio_round_buffersize,
    209 	.mappage		= gcscaudio_mappage,
    210 	.get_props		= gcscaudio_get_props,
    211 	.trigger_output		= gcscaudio_trigger_output,
    212 	.trigger_input		= gcscaudio_trigger_input,
    213 	.dev_ioctl		= NULL,
    214 	.powerstate		= NULL
    215 };
    216 
    217 static const struct audio_format gcscaudio_formats_2ch = {
    218 	NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    219 	2, AUFMT_STEREO, 0, {8000, 48000}
    220 };
    221 
    222 static const struct audio_format gcscaudio_formats_4ch = {
    223 	NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    224 	4, AUFMT_SURROUND4, 0, {8000, 48000}
    225 };
    226 
    227 static const struct audio_format gcscaudio_formats_6ch = {
    228 	NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    229 	6, AUFMT_DOLBY_5_1, 0, {8000, 48000}
    230 };
    231 
    232 static int
    233 gcscaudio_match(device_t parent, cfdata_t match, void *aux)
    234 {
    235 	struct pci_attach_args *pa;
    236 
    237 	pa = (struct pci_attach_args *)aux;
    238 	if ((PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD) &&
    239 	    (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_CS5536_AUDIO))
    240 		return 1;
    241 
    242 	return 0;
    243 }
    244 
    245 static int
    246 gcscaudio_append_formats(struct gcscaudio_softc *sc,
    247                          const struct audio_format *format)
    248 {
    249 	if (sc->sc_nformats >= GCSCAUDIO_MAXFORMATS) {
    250 		aprint_error_dev(&sc->sc_dev, "too many formats\n");
    251 		return EINVAL;
    252 	}
    253 	sc->sc_formats[sc->sc_nformats++] = *format;
    254 	return 0;
    255 }
    256 
    257 static void
    258 gcscaudio_attach(device_t parent, device_t self, void *aux)
    259 {
    260 	struct gcscaudio_softc *sc;
    261 	struct pci_attach_args *pa;
    262 	const char *intrstr;
    263 	pci_intr_handle_t ih;
    264 	int rc, i;
    265 
    266 	sc = device_private(self);
    267 
    268 	aprint_naive(": Audio controller\n");
    269 
    270 	pa = aux;
    271 	sc->sc_pc = pa->pa_pc;
    272 	sc->sc_pt = pa->pa_tag;
    273 	sc->sc_dmat = pa->pa_dmat;
    274 	LIST_INIT(&sc->sc_dmalist);
    275 	sc->sc_mch_split_buf = NULL;
    276 
    277 	aprint_normal(": AMD Geode CS5536 Audio\n");
    278 
    279 	if (pci_mapreg_map(pa, PCI_MAPREG_START, PCI_MAPREG_TYPE_IO, 0,
    280 	    &sc->sc_iot, &sc->sc_ioh, NULL, &sc->sc_ios)) {
    281 		aprint_error_dev(&sc->sc_dev, "can't map i/o space\n");
    282 		return;
    283 	}
    284 
    285 	if (pci_intr_map(pa, &ih)) {
    286 		aprint_error_dev(&sc->sc_dev, "couldn't map interrupt\n");
    287 		goto attach_failure_unmap;
    288 	}
    289 	intrstr = pci_intr_string(sc->sc_pc, ih);
    290 
    291 	sc->sc_ih = pci_intr_establish(sc->sc_pc, ih, IPL_AUDIO,
    292 	    gcscaudio_intr, sc);
    293 	if (sc->sc_ih == NULL) {
    294 		aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt");
    295 		if (intrstr != NULL)
    296 			aprint_error(" at %s", intrstr);
    297 		aprint_error("\n");
    298 		goto attach_failure_unmap;
    299 	}
    300 
    301 	aprint_normal_dev(&sc->sc_dev, "interrupting at %s\n", intrstr);
    302 
    303 
    304 	if (gcscaudio_allocate_dma(sc, sizeof(*sc->sc_prd.p_prdtables),
    305 	    (void **)&(sc->sc_prd.p_prdtables), sc->sc_prd.p_prdsegs, 1,
    306 	    &(sc->sc_prd.p_prdnseg), M_WAITOK, &(sc->sc_prd.p_prdmap)) != 0)
    307 		goto attach_failure_intr;
    308 
    309 	sc->host_if.arg = sc;
    310 	sc->host_if.attach = gcscaudio_attach_codec;
    311 	sc->host_if.read = gcscaudio_read_codec;
    312 	sc->host_if.write = gcscaudio_write_codec;
    313 	sc->host_if.reset = gcscaudio_reset_codec;
    314 	sc->host_if.spdif_event = gcscaudio_spdif_event_codec;
    315 
    316 	if ((rc = ac97_attach(&sc->host_if, self)) != 0) {
    317 		aprint_error_dev(&sc->sc_dev,
    318 		    "can't attach codec (error=%d)\n", rc);
    319 		goto attach_failure_intr;
    320 	}
    321 
    322 	if (!pmf_device_register(self, NULL, gcscaudio_resume))
    323 		aprint_error_dev(self, "couldn't establish power handler\n");
    324 
    325 
    326 	sc->sc_nformats = 0;
    327 	gcscaudio_append_formats(sc, &gcscaudio_formats_2ch);
    328 	if (AC97_IS_4CH(sc->codec_if))
    329 		gcscaudio_append_formats(sc, &gcscaudio_formats_4ch);
    330 	if (AC97_IS_6CH(sc->codec_if))
    331 		gcscaudio_append_formats(sc, &gcscaudio_formats_6ch);
    332 	if (AC97_IS_FIXED_RATE(sc->codec_if)) {
    333 		for (i = 0; i < sc->sc_nformats; i++) {
    334 			sc->sc_formats[i].frequency_type = 1;
    335 			sc->sc_formats[i].frequency[0] = 48000;
    336 		}
    337 	}
    338 
    339 	if ((rc = auconv_create_encodings(sc->sc_formats, sc->sc_nformats,
    340 	    &sc->sc_encodings)) != 0) {
    341 		aprint_error_dev(self,
    342 		    "auconv_create_encoding: error=%d\n", rc);
    343 		goto attach_failure_codec;
    344 	}
    345 
    346 	audio_attach_mi(&gcscaudio_hw_if, sc, &sc->sc_dev);
    347 	sc->codec_if->vtbl->unlock(sc->codec_if);
    348 	return;
    349 
    350 attach_failure_codec:
    351 	sc->codec_if->vtbl->detach(sc->codec_if);
    352 attach_failure_intr:
    353 	pci_intr_disestablish(sc->sc_pc, sc->sc_ih);
    354 attach_failure_unmap:
    355 	bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
    356 	return;
    357 }
    358 
    359 static int
    360 gcscaudio_attach_codec(void *arg, struct ac97_codec_if *codec_if)
    361 {
    362 	struct gcscaudio_softc *sc;
    363 
    364 	sc = (struct gcscaudio_softc *)arg;
    365 	sc->codec_if = codec_if;
    366 	return 0;
    367 }
    368 
    369 static int
    370 gcscaudio_reset_codec(void *arg)
    371 {
    372 	struct gcscaudio_softc *sc;
    373 	sc = (struct gcscaudio_softc *)arg;
    374 
    375 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_CODEC_CNTL,
    376 	    ACC_CODEC_CNTL_LNK_WRM_RST |
    377 	    ACC_CODEC_CNTL_CMD_NEW);
    378 
    379 	if (gcscaudio_wait_ready_codec(sc, "reset timeout\n"))
    380 		return 1;
    381 
    382 	return 0;
    383 }
    384 
    385 static void
    386 gcscaudio_spdif_event_codec(void *arg, bool flag)
    387 {
    388 	struct gcscaudio_softc *sc;
    389 
    390 	sc = (struct gcscaudio_softc *)arg;
    391 	sc->sc_spdif = flag;
    392 }
    393 
    394 static int
    395 gcscaudio_wait_ready_codec(struct gcscaudio_softc *sc, const char *timeout_msg)
    396 {
    397 	int i;
    398 
    399 #define GCSCAUDIO_WAIT_READY_CODEC_TIMEOUT	500
    400 	for (i = GCSCAUDIO_WAIT_READY_CODEC_TIMEOUT; (i >= 0) &&
    401 	    (bus_space_read_4(sc->sc_iot, sc->sc_ioh, ACC_CODEC_CNTL) &
    402 	    ACC_CODEC_CNTL_CMD_NEW); i--)
    403 		delay(1);
    404 
    405 	if (i < 0) {
    406 		aprint_error_dev(&sc->sc_dev, timeout_msg);
    407 		return 1;
    408 	}
    409 
    410 	return 0;
    411 }
    412 
    413 static int
    414 gcscaudio_write_codec(void *arg, uint8_t reg, uint16_t val)
    415 {
    416 	struct gcscaudio_softc *sc;
    417 
    418 	sc = (struct gcscaudio_softc *)arg;
    419 
    420 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_CODEC_CNTL,
    421 	    ACC_CODEC_CNTL_WRITE_CMD |
    422 	    ACC_CODEC_CNTL_CMD_NEW |
    423 	    ACC_CODEC_REG2ADDR(reg) |
    424 	    (val & ACC_CODEC_CNTL_CMD_DATA_MASK));
    425 
    426 	if (gcscaudio_wait_ready_codec(sc, "codec write timeout\n"))
    427 		return 1;
    428 
    429 #ifdef GCSCAUDIO_CODEC_DEBUG
    430 	aprint_error_dev(&sc->sc_dev, "codec write: reg=0x%02x, val=0x%04x\n",
    431 	    reg, val);
    432 #endif
    433 
    434 	return 0;
    435 }
    436 
    437 static int
    438 gcscaudio_read_codec(void *arg, uint8_t reg, uint16_t *val)
    439 {
    440 	struct gcscaudio_softc *sc;
    441 	uint32_t v;
    442 	int i;
    443 
    444 	sc = (struct gcscaudio_softc *)arg;
    445 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_CODEC_CNTL,
    446 	    ACC_CODEC_CNTL_READ_CMD | ACC_CODEC_CNTL_CMD_NEW |
    447 	    ACC_CODEC_REG2ADDR(reg));
    448 
    449 	if (gcscaudio_wait_ready_codec(sc, "codec write timeout for reading"))
    450 		return 1;
    451 
    452 #define GCSCAUDIO_READ_CODEC_TIMEOUT	50
    453 	for (i = GCSCAUDIO_READ_CODEC_TIMEOUT; i >= 0; i--) {
    454 		v = bus_space_read_4(sc->sc_iot, sc->sc_ioh, ACC_CODEC_STATUS);
    455 		if ((v & ACC_CODEC_STATUS_STS_NEW) &&
    456 		    (ACC_CODEC_ADDR2REG(v) == reg))
    457 			break;
    458 
    459 		delay(10);
    460 	}
    461 
    462 	if (i < 0) {
    463 		aprint_error_dev(&sc->sc_dev, "codec read timeout\n");
    464 		return 1;
    465 	}
    466 
    467 #ifdef GCSCAUDIO_CODEC_DEBUG
    468 	aprint_error_dev(&sc->sc_dev, "codec read: reg=0x%02x, val=0x%04x\n",
    469 	    reg, v & ACC_CODEC_STATUS_STS_DATA_MASK);
    470 #endif
    471 
    472 	*val = v;
    473 	return 0;
    474 }
    475 
    476 static int
    477 gcscaudio_open(void *arg, int flags)
    478 {
    479 	struct gcscaudio_softc *sc;
    480 
    481 	sc = (struct gcscaudio_softc *)arg;
    482 	sc->codec_if->vtbl->lock(sc->codec_if);
    483 	return 0;
    484 }
    485 
    486 static void
    487 gcscaudio_close(void *arg)
    488 {
    489 	struct gcscaudio_softc *sc;
    490 
    491 	sc = (struct gcscaudio_softc *)arg;
    492 	sc->codec_if->vtbl->unlock(sc->codec_if);
    493 }
    494 
    495 static int
    496 gcscaudio_query_encoding(void *arg, struct audio_encoding *fp)
    497 {
    498 	struct gcscaudio_softc *sc;
    499 
    500 	sc = (struct gcscaudio_softc *)arg;
    501 	return auconv_query_encoding(sc->sc_encodings, fp);
    502 }
    503 
    504 static int
    505 gcscaudio_set_params_ch(struct gcscaudio_softc *sc,
    506                         struct gcscaudio_softc_ch *ch, int mode,
    507                         audio_params_t *p, stream_filter_list_t *fil)
    508 {
    509 	int error, idx;
    510 
    511 	if ((p->sample_rate < 8000) || (p->sample_rate > 48000))
    512 		return EINVAL;
    513 
    514 	if (p->precision != 8 && p->precision != 16)
    515 		return EINVAL;
    516 
    517 	if ((idx = auconv_set_converter(sc->sc_formats, sc->sc_nformats,
    518 	    mode, p, TRUE, fil)) < 0)
    519 		return EINVAL;
    520 
    521 	if (fil->req_size > 0)
    522 		p = &fil->filters[0].param;
    523 
    524 	if (mode == AUMODE_PLAY) {
    525 		if (!AC97_IS_FIXED_RATE(sc->codec_if)) {
    526 			/* setup rate of DAC/ADC */
    527 			if ((error = sc->codec_if->vtbl->set_rate(sc->codec_if,
    528 			    AC97_REG_PCM_LR_ADC_RATE, &p->sample_rate)) != 0)
    529 				return error;
    530 
    531 			/* additional rate of DAC for Surround */
    532 			if ((p->channels >= 4) &&
    533 			    (error = sc->codec_if->vtbl->set_rate(sc->codec_if,
    534 			    AC97_REG_PCM_SURR_DAC_RATE, &p->sample_rate)) != 0)
    535 				return error;
    536 
    537 			/* additional rate of DAC for LowFrequencyEffect */
    538 			if ((p->channels == 6) &&
    539 			    (error = sc->codec_if->vtbl->set_rate(sc->codec_if,
    540 			    AC97_REG_PCM_LFE_DAC_RATE, &p->sample_rate)) != 0)
    541 				return error;
    542 		}
    543 	}
    544 
    545 	if (mode == AUMODE_RECORD) {
    546 		if (!AC97_IS_FIXED_RATE(sc->codec_if)) {
    547 			/* setup rate of DAC/ADC */
    548 			if ((error = sc->codec_if->vtbl->set_rate(sc->codec_if,
    549 			    AC97_REG_PCM_FRONT_DAC_RATE, &p->sample_rate)) != 0)
    550 				return error;
    551 		}
    552 	}
    553 
    554 	ch->ch_params = *p;
    555 	return 0;
    556 }
    557 
    558 static int
    559 gcscaudio_set_params(void *arg, int setmode, int usemode,
    560                      audio_params_t *play, audio_params_t *rec,
    561                      stream_filter_list_t *pfil, stream_filter_list_t *rfil)
    562 {
    563 	struct gcscaudio_softc *sc;
    564 	int error;
    565 
    566 	sc = (struct gcscaudio_softc *)arg;
    567 
    568 	if (setmode & AUMODE_PLAY) {
    569 		if ((error = gcscaudio_set_params_ch(sc, &sc->sc_play,
    570 		    AUMODE_PLAY, play, pfil)) != 0)
    571 			return error;
    572 	}
    573 	if (setmode & AUMODE_RECORD) {
    574 		if ((error = gcscaudio_set_params_ch(sc, &sc->sc_rec,
    575 		    AUMODE_RECORD, rec, rfil)) != 0)
    576 			return error;
    577 	}
    578 
    579 	return 0;
    580 }
    581 
    582 static int
    583 gcscaudio_round_blocksize(void *arg, int blk, int mode,
    584                           const audio_params_t *param)
    585 {
    586 	blk &= -4;
    587 	if (blk > GCSCAUDIO_PRD_SIZE_MAX)
    588 		blk = GCSCAUDIO_PRD_SIZE_MAX;
    589 
    590 	return blk;
    591 }
    592 
    593 static int
    594 gcscaudio_halt_output(void *arg)
    595 {
    596 	struct gcscaudio_softc *sc;
    597 
    598 	sc = (struct gcscaudio_softc *)arg;
    599 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM0_CMD,
    600 	    ACC_BMx_CMD_BM_CTL_DISABLE);
    601 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM4_CMD,
    602 	    ACC_BMx_CMD_BM_CTL_DISABLE);
    603 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM6_CMD,
    604 	    ACC_BMx_CMD_BM_CTL_DISABLE);
    605 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM7_CMD,
    606 	    ACC_BMx_CMD_BM_CTL_DISABLE);
    607 	sc->sc_play.ch_intr = NULL;
    608 
    609 	/* channel splitter */
    610 	sc->sc_mch_splitter = NULL;
    611 	if (sc->sc_mch_split_buf)
    612 		gcscaudio_free(sc, sc->sc_mch_split_buf, M_DEVBUF);
    613 	sc->sc_mch_split_buf = NULL;
    614 
    615 	return 0;
    616 }
    617 
    618 static int
    619 gcscaudio_halt_input(void *arg)
    620 {
    621 	struct gcscaudio_softc *sc;
    622 
    623 	sc = (struct gcscaudio_softc *)arg;
    624 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM1_CMD,
    625 	    ACC_BMx_CMD_BM_CTL_DISABLE);
    626 	sc->sc_rec.ch_intr = NULL;
    627 	return 0;
    628 }
    629 
    630 static int
    631 gcscaudio_getdev(void *addr, struct audio_device *retp)
    632 {
    633 	*retp = gcscaudio_device;
    634 	return 0;
    635 }
    636 
    637 static int
    638 gcscaudio_set_port(void *addr, mixer_ctrl_t *cp)
    639 {
    640 	struct gcscaudio_softc *sc;
    641 
    642 	sc = addr;
    643 	return sc->codec_if->vtbl->mixer_set_port(sc->codec_if, cp);
    644 }
    645 
    646 static int
    647 gcscaudio_get_port(void *addr, mixer_ctrl_t *cp)
    648 {
    649 	struct gcscaudio_softc *sc;
    650 
    651 	sc = addr;
    652 	return sc->codec_if->vtbl->mixer_get_port(sc->codec_if, cp);
    653 }
    654 
    655 static int
    656 gcscaudio_query_devinfo(void *addr, mixer_devinfo_t *dip)
    657 {
    658 	struct gcscaudio_softc *sc;
    659 
    660 	sc = addr;
    661 	return sc->codec_if->vtbl->query_devinfo(sc->codec_if, dip);
    662 }
    663 
    664 static void *
    665 gcscaudio_malloc(void *arg, int direction, size_t size,
    666                  struct malloc_type *pool, int flags)
    667 {
    668 	struct gcscaudio_softc *sc;
    669 	struct gcscaudio_dma *p;
    670 	int error;
    671 
    672 	sc = (struct gcscaudio_softc *)arg;
    673 
    674 	p = malloc(sizeof(*p), pool, flags);
    675 	if (p == NULL)
    676 		return NULL;
    677 	p->size = size;
    678 
    679 	error = gcscaudio_allocate_dma(sc, size, &p->addr,
    680 	    p->segs, sizeof(p->segs)/sizeof(p->segs[0]), &p->nseg,
    681 	    BUS_DMA_NOWAIT, &p->map);
    682 
    683 	if (error) {
    684 		free(p, pool);
    685 		return NULL;
    686 	}
    687 
    688 	LIST_INSERT_HEAD(&sc->sc_dmalist, p, list);
    689 	return p->addr;
    690 }
    691 
    692 static void
    693 gcscaudio_free(void *arg, void *ptr, struct malloc_type *pool)
    694 {
    695 	struct gcscaudio_softc *sc;
    696 	struct gcscaudio_dma *p;
    697 
    698 	sc = (struct gcscaudio_softc *)arg;
    699 
    700 	LIST_FOREACH(p, &sc->sc_dmalist, list) {
    701 		if (p->addr == ptr) {
    702 			bus_dmamap_unload(sc->sc_dmat, p->map);
    703 			bus_dmamap_destroy(sc->sc_dmat, p->map);
    704 			bus_dmamem_unmap(sc->sc_dmat, p->addr, p->size);
    705 			bus_dmamem_free(sc->sc_dmat, p->segs, p->nseg);
    706 
    707 			LIST_REMOVE(p, list);
    708 			free(p, pool);
    709 			break;
    710 		}
    711 	}
    712 }
    713 
    714 static paddr_t
    715 gcscaudio_mappage(void *arg, void *mem, off_t off, int prot)
    716 {
    717 	struct gcscaudio_softc *sc;
    718 	struct gcscaudio_dma *p;
    719 
    720 	if (off < 0)
    721 		return -1;
    722 
    723 	sc = (struct gcscaudio_softc *)arg;
    724 	LIST_FOREACH(p, &sc->sc_dmalist, list) {
    725 		if (p->addr == mem) {
    726 			return bus_dmamem_mmap(sc->sc_dmat, p->segs, p->nseg,
    727 			    off, prot, BUS_DMA_WAITOK);
    728 		}
    729 	}
    730 
    731 	return -1;
    732 }
    733 
    734 static size_t
    735 gcscaudio_round_buffersize(void *addr, int direction, size_t size)
    736 {
    737 	if (size > GCSCAUDIO_BUFSIZE_MAX)
    738 		size = GCSCAUDIO_BUFSIZE_MAX;
    739 
    740 	return size;
    741 }
    742 
    743 static int
    744 gcscaudio_get_props(void *addr)
    745 {
    746 	struct gcscaudio_softc *sc;
    747 	int props;
    748 
    749 	sc = (struct gcscaudio_softc *)addr;
    750 	props = AUDIO_PROP_INDEPENDENT | AUDIO_PROP_FULLDUPLEX;
    751 	/*
    752 	 * Even if the codec is fixed-rate, set_param() succeeds for any sample
    753 	 * rate because of aurateconv.  Applications can't know what rate the
    754 	 * device can process in the case of mmap().
    755 	 */
    756 	if (!AC97_IS_FIXED_RATE(sc->codec_if))
    757 		props |= AUDIO_PROP_MMAP;
    758 	return props;
    759 }
    760 
    761 static int
    762 build_prdtables(struct gcscaudio_softc *sc, int prdidx,
    763                 void *addr, size_t size, int blksize, int blklen, int blkoff)
    764 {
    765 	struct gcscaudio_dma *p;
    766 	struct acc_prd *prdp;
    767 	bus_addr_t paddr;
    768 	int i;
    769 
    770 	/* get physical address of start */
    771 	paddr = (bus_addr_t)0;
    772 	LIST_FOREACH(p, &sc->sc_dmalist, list) {
    773 		if (p->addr == addr) {
    774 			paddr = p->map->dm_segs[0].ds_addr;
    775 			break;
    776 		}
    777 	}
    778 	if (!paddr) {
    779 		aprint_error_dev(&sc->sc_dev,
    780 		    "bad addr %p\n", addr);
    781 		return EINVAL;
    782 	}
    783 
    784 #define PRDADDR(prdidx,idx) \
    785 	(sc->sc_prd.p_prdmap->dm_segs[0].ds_addr) + sizeof(struct acc_prd) * \
    786 	(((prdidx) * GCSCAUDIO_NPRDTABLE) + (idx))
    787 
    788 	/*
    789 	 * build PRD table
    790 	 *   prdtbl[] = <PRD0>, <PRD1>, <PRD2>, ..., <PRDn>, <jmp to PRD0>
    791 	 */
    792 	prdp = sc->sc_prd.p_prdtables->prdtbl[prdidx];
    793 	for (i = 0; size > 0; size -= blksize, i++) {
    794 		prdp[i].address = paddr + blksize * i + blkoff;
    795 		prdp[i].ctrlsize =
    796 		    (size < blklen ? size : blklen) | ACC_BMx_PRD_CTRL_EOP;
    797 	}
    798 	prdp[i].address = PRDADDR(prdidx, 0);
    799 	prdp[i].ctrlsize = ACC_BMx_PRD_CTRL_JMP;
    800 
    801 	bus_dmamap_sync(sc->sc_dmat, sc->sc_prd.p_prdmap, 0,
    802 	    sizeof(struct acc_prd) * i, BUS_DMASYNC_PREWRITE);
    803 
    804 	return 0;
    805 }
    806 
    807 static void
    808 split_buffer_4ch(void *dst, void *src, int size, int blksize)
    809 {
    810 	int left, i;
    811 	uint16_t *s, *d;
    812 
    813 	/*
    814 	 * src[blk0]: L,R,SL,SR,L,R,SL,SR,L,R,SL,SR,....
    815 	 * src[blk1]: L,R,SL,SR,L,R,SL,SR,L,R,SL,SR,....
    816 	 * src[blk2]: L,R,SL,SR,L,R,SL,SR,L,R,SL,SR,....
    817 	 *     :
    818 	 *
    819 	 *   rearrange to
    820 	 *
    821 	 * src[blk0]: L,R,L,R,L,R,L,R,..
    822 	 * src[blk1]: L,R,L,R,L,R,L,R,..
    823 	 * src[blk2]: L,R,L,R,L,R,L,R,..
    824 	 *     :
    825 	 * dst[blk0]: SL,SR,SL,SR,SL,SR,SL,SR,..
    826 	 * dst[blk1]: SL,SR,SL,SR,SL,SR,SL,SR,..
    827 	 * dst[blk2]: SL,SR,SL,SR,SL,SR,SL,SR,..
    828 	 *     :
    829 	 */
    830 	for (left = size; left > 0; left -= blksize) {
    831 		s = (uint16_t *)src;
    832 		d = (uint16_t *)dst;
    833 		for (i = 0; i < blksize / sizeof(uint16_t) / 4; i++) {
    834 			/* L,R,SL,SR -> SL,SR */
    835 			s++;
    836 			s++;
    837 			*d++ = *s++;
    838 			*d++ = *s++;
    839 		}
    840 
    841 		s = (uint16_t *)src;
    842 		d = (uint16_t *)src;
    843 		for (i = 0; i < blksize / sizeof(uint16_t) / 2 / 2; i++) {
    844 			/* L,R,SL,SR -> L,R */
    845 			*d++ = *s++;
    846 			*d++ = *s++;
    847 			s++;
    848 			s++;
    849 		}
    850 
    851 		src = (char *)src + blksize;
    852 		dst = (char *)dst + blksize;
    853 	}
    854 }
    855 
    856 static void
    857 split_buffer_6ch(void *dst, void *src, int size, int blksize)
    858 {
    859 	int left, i;
    860 	uint16_t *s, *d, *dc, *dl;
    861 
    862 	/*
    863 	 * by default, treat as WAV style 5.1ch order
    864 	 *   5.1ch(WAV): L R C LFE SL SR
    865 	 *   5.1ch(AAC): C L R SL SR LFE
    866 	 *        :
    867 	 */
    868 
    869 	/*
    870 	 * src[blk0]: L,R,C,LFE,SL,SR,L,R,C,LFE,SL,SR,...
    871 	 * src[blk1]: L,R,C,LFE,SL,SR,L,R,C,LFE,SL,SR,...
    872 	 * src[blk2]: L,R,C,LFE,SL,SR,L,R,C,LFE,SL,SR,...
    873 	 *     :
    874 	 * src[N-1] : L,R,C,LFE,SL,SR,L,R,C,LFE,SL,SR,...
    875 	 *
    876 	 *   rearrange to
    877 	 *
    878 	 * src[blk0]: L,R,L,R,..
    879 	 * src[blk1]: L,R,L,R,..
    880 	 * src[blk2]: L,R,L,R,..
    881 	 *     :
    882 	 *
    883 	 * dst[blk0]: SL,SR,SL,SR,..
    884 	 * dst[blk1]: SL,SR,SL,SR,..
    885 	 * dst[blk2]: SL,SR,SL,SR,..
    886 	 *     :
    887 	 *
    888 	 * dst[N/2+0]: C,C,C,..
    889 	 * dst[N/2+1]: C,C,C,..
    890 	 *     :
    891 	 *
    892 	 * dst[N/2+N/4+0]: LFE,LFE,LFE,..
    893 	 * dst[N/2+N/4+1]: LFE,LFE,LFE,..
    894 	 *     :
    895 	 */
    896 
    897 	for (left = size; left > 0; left -= blksize) {
    898 		s = (uint16_t *)src;
    899 		d = (uint16_t *)dst;
    900 		dc = (uint16_t *)((char *)dst + blksize / 2);
    901 		dl = (uint16_t *)((char *)dst + blksize / 2 + blksize / 4);
    902 		for (i = 0; i < blksize / sizeof(uint16_t) / 6; i++) {
    903 #ifdef GCSCAUDIO_5_1CH_AAC_ORDER
    904 			/*
    905 			 * AAC: [C,L,R,SL,SR,LFE]
    906 			 *  => [SL,SR]
    907 			 *  => [C]
    908 			 *  => [LFE]
    909 			 */
    910 			*dc++ = s[0];	/* C */
    911 			*dl++ = s[5];	/* LFE */
    912 			*d++ = s[3];	/* SL */
    913 			*d++ = s[4];	/* SR */
    914 #else
    915 			/*
    916 			 * WAV: [L,R,C,LFE,SL,SR]
    917 			 *  => [SL,SR]
    918 			 *  => [C]
    919 			 *  => [LFE]
    920 			 */
    921 			*dc++ = s[2];	/* C */
    922 			*dl++ = s[3];	/* LFE */
    923 			*d++ = s[4];	/* SL */
    924 			*d++ = s[5];	/* SR */
    925 #endif
    926 			s += 6;
    927 		}
    928 
    929 		s = (uint16_t *)src;
    930 		d = (uint16_t *)src;
    931 		for (i = 0; i < blksize / sizeof(uint16_t) / 2 / 2; i++) {
    932 #ifdef GCSCAUDIO_5_1CH_AAC_ORDER
    933 			/* AAC: [C,L,R,SL,SR,LFE] => [L,R] */
    934 			*d++ = s[1];
    935 			*d++ = s[2];
    936 #else
    937 			/* WAV: [L,R,C,LFE,SL,SR] => [L,R] */
    938 			*d++ = s[0];
    939 			*d++ = s[1];
    940 #endif
    941 			s += 6;
    942 		}
    943 
    944 		src = (char *)src + blksize;
    945 		dst = (char *)dst + blksize;
    946 	}
    947 }
    948 
    949 static void
    950 channel_splitter(struct gcscaudio_softc *sc)
    951 {
    952 	int splitsize, left;
    953 	void *src, *dst;
    954 
    955 	if (sc->sc_mch_splitter == NULL)
    956 		return;
    957 
    958 	left = sc->sc_mch_split_size - sc->sc_mch_split_off;
    959 	splitsize = sc->sc_mch_split_blksize;
    960 	if (left < splitsize)
    961 		splitsize = left;
    962 
    963 	src = (char *)sc->sc_mch_split_start + sc->sc_mch_split_off;
    964 	dst = (char *)sc->sc_mch_split_buf + sc->sc_mch_split_off;
    965 
    966 	sc->sc_mch_splitter(dst, src, splitsize, sc->sc_mch_split_blksize);
    967 
    968 	sc->sc_mch_split_off += sc->sc_mch_split_blksize;
    969 	if (sc->sc_mch_split_off >= sc->sc_mch_split_size)
    970 		sc->sc_mch_split_off = 0;
    971 }
    972 
    973 static int
    974 gcscaudio_trigger_output(void *addr, void *start, void *end, int blksize,
    975                          void (*intr)(void *), void *arg,
    976                          const audio_params_t *param)
    977 {
    978 	struct gcscaudio_softc *sc;
    979 	size_t size;
    980 
    981 	sc = (struct gcscaudio_softc *)addr;
    982 	sc->sc_play.ch_intr = intr;
    983 	sc->sc_play.ch_intr_arg = arg;
    984 	size = (char *)end - (char *)start;
    985 
    986 	switch (sc->sc_play.ch_params.channels) {
    987 	case 2:
    988 		if (build_prdtables(sc, PRD_TABLE_FRONT, start, size, blksize,
    989 		    blksize, 0))
    990 			return EINVAL;
    991 
    992 		if (!AC97_IS_4CH(sc->codec_if)) {
    993 			/*
    994 			 * output 2ch PCM to FRONT.LR(BM0)
    995 			 *
    996 			 * 2ch: L,R,L,R,L,R,L,R,... => BM0: L,R,L,R,L,R,L,R,...
    997 			 *
    998 			 */
    999 			bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM0_PRD,
   1000 			    PRDADDR(PRD_TABLE_FRONT, 0));
   1001 
   1002 			/* start DMA transfer */
   1003 			bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM0_CMD,
   1004 			    ACC_BMx_CMD_WRITE |
   1005 			    ACC_BMx_CMD_BYTE_ORD_EL |
   1006 			    ACC_BMx_CMD_BM_CTL_ENABLE);
   1007 		} else {
   1008 			/*
   1009 			 * output same PCM to FRONT.LR(BM0) and SURROUND.LR(BM6).
   1010 			 * CENTER(BM4) and LFE(BM7) doesn't sound.
   1011 			 *
   1012 			 * 2ch: L,R,L,R,L,R,L,R,... => BM0: L,R,L,R,L,R,L,R,...
   1013 			 *                             BM6: (same of BM0)
   1014 			 *                             BM4: none
   1015 			 *                             BM7: none
   1016 			 */
   1017 			bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM0_PRD,
   1018 			    PRDADDR(PRD_TABLE_FRONT, 0));
   1019 			bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM6_PRD,
   1020 			    PRDADDR(PRD_TABLE_FRONT, 0));
   1021 
   1022 			/* start DMA transfer */
   1023 			bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM0_CMD,
   1024 			    ACC_BMx_CMD_WRITE |
   1025 			    ACC_BMx_CMD_BYTE_ORD_EL |
   1026 			    ACC_BMx_CMD_BM_CTL_ENABLE);
   1027 			bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM6_CMD,
   1028 			    ACC_BMx_CMD_WRITE |
   1029 			    ACC_BMx_CMD_BYTE_ORD_EL |
   1030 			    ACC_BMx_CMD_BM_CTL_ENABLE);
   1031 		}
   1032 		break;
   1033 	case 4:
   1034 		/*
   1035 		 * output 4ch PCM split to FRONT.LR(BM0) and SURROUND.LR(BM6).
   1036 		 * CENTER(BM4) and LFE(BM7) doesn't sound.
   1037 		 *
   1038 		 * rearrange ordered channel to continuous per channel
   1039 		 *
   1040 		 *   4ch: L,R,SL,SR,L,R,SL,SR,... => BM0: L,R,L,R,...
   1041 		 *                                   BM6: SL,SR,SL,SR,...
   1042 		 *                                   BM4: none
   1043 		 *                                   BM7: none
   1044 		 */
   1045 		if (sc->sc_mch_split_buf)
   1046 			gcscaudio_free(sc, sc->sc_mch_split_buf, M_DEVBUF);
   1047 
   1048 		if ((sc->sc_mch_split_buf = gcscaudio_malloc(sc, AUMODE_PLAY,
   1049 		    size, M_DEVBUF, M_WAITOK)) == NULL)
   1050 			return ENOMEM;
   1051 
   1052 		/*
   1053 		 * 1st and 2nd blocks are split immediately.
   1054 		 * Other blocks will be split synchronous with intr.
   1055 		 */
   1056 		split_buffer_4ch(sc->sc_mch_split_buf, start, blksize * 2,
   1057 		    blksize);
   1058 
   1059 		sc->sc_mch_split_start = start;
   1060 		sc->sc_mch_split_size = size;
   1061 		sc->sc_mch_split_blksize = blksize;
   1062 		sc->sc_mch_split_off = (blksize * 2) % size;
   1063 		sc->sc_mch_splitter = split_buffer_4ch;	/* split function */
   1064 
   1065 		if (build_prdtables(sc, PRD_TABLE_FRONT, start, size, blksize,
   1066 		    blksize / 2, 0))
   1067 			return EINVAL;
   1068 		if (build_prdtables(sc, PRD_TABLE_SURR, sc->sc_mch_split_buf,
   1069 		    size, blksize, blksize / 2, 0))
   1070 			return EINVAL;
   1071 
   1072 		bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM0_PRD,
   1073 		    PRDADDR(PRD_TABLE_FRONT, 0));
   1074 		bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM6_PRD,
   1075 		    PRDADDR(PRD_TABLE_SURR, 0));
   1076 
   1077 		/* start DMA transfer */
   1078 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM0_CMD,
   1079 		    ACC_BMx_CMD_WRITE |
   1080 		    ACC_BMx_CMD_BYTE_ORD_EL |
   1081 		    ACC_BMx_CMD_BM_CTL_ENABLE);
   1082 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM6_CMD,
   1083 		    ACC_BMx_CMD_WRITE |
   1084 		    ACC_BMx_CMD_BYTE_ORD_EL |
   1085 		    ACC_BMx_CMD_BM_CTL_ENABLE);
   1086 		break;
   1087 	case 6:
   1088 		/*
   1089 		 * output 6ch PCM split to
   1090 		 * FRONT.LR(BM0), SURROUND.LR(BM6), CENTER(BM4) and LFE(BM7)
   1091 		 *
   1092 		 * rearrange ordered channel to continuous per channel
   1093 		 *
   1094 		 *   5.1ch: L,R,C,LFE,SL,SR,... => BM0: L,R,...
   1095 		 *                                 BM4: C,...
   1096 		 *                                 BM6: SL,SR,...
   1097 		 *                                 BM7: LFE,...
   1098 		 *
   1099 		 */
   1100 		if (sc->sc_mch_split_buf)
   1101 			gcscaudio_free(sc, sc->sc_mch_split_buf, M_DEVBUF);
   1102 
   1103 		if ((sc->sc_mch_split_buf = gcscaudio_malloc(sc, AUMODE_PLAY,
   1104 		    size, M_DEVBUF, M_WAITOK)) == NULL)
   1105 			return ENOMEM;
   1106 
   1107 		/*
   1108 		 * 1st and 2nd blocks are split immediately.
   1109 		 * Other block will be split synchronous with intr.
   1110 		 */
   1111 		split_buffer_6ch(sc->sc_mch_split_buf, start, blksize * 2,
   1112 		    blksize);
   1113 
   1114 		sc->sc_mch_split_start = start;
   1115 		sc->sc_mch_split_size = size;
   1116 		sc->sc_mch_split_blksize = blksize;
   1117 		sc->sc_mch_split_off = (blksize * 2) % size;
   1118 		sc->sc_mch_splitter = split_buffer_6ch;	/* split function */
   1119 
   1120 		if (build_prdtables(sc, PRD_TABLE_FRONT, start, size, blksize,
   1121 		    blksize / 3, 0))
   1122 			return EINVAL;
   1123 		if (build_prdtables(sc, PRD_TABLE_CENTER, sc->sc_mch_split_buf,
   1124 		    size, blksize, blksize / 3, blksize / 2))
   1125 			return EINVAL;
   1126 		if (build_prdtables(sc, PRD_TABLE_SURR, sc->sc_mch_split_buf,
   1127 		    size, blksize, blksize / 3, 0))
   1128 			return EINVAL;
   1129 		if (build_prdtables(sc, PRD_TABLE_LFE, sc->sc_mch_split_buf,
   1130 		    size, blksize, blksize / 3, blksize / 2 + blksize / 4))
   1131 			return EINVAL;
   1132 
   1133 		bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM0_PRD,
   1134 		    PRDADDR(PRD_TABLE_FRONT, 0));
   1135 		bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM4_PRD,
   1136 		    PRDADDR(PRD_TABLE_CENTER, 0));
   1137 		bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM6_PRD,
   1138 		    PRDADDR(PRD_TABLE_SURR, 0));
   1139 		bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM7_PRD,
   1140 		    PRDADDR(PRD_TABLE_LFE, 0));
   1141 
   1142 		/* start DMA transfer */
   1143 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM0_CMD,
   1144 		    ACC_BMx_CMD_WRITE | ACC_BMx_CMD_BYTE_ORD_EL |
   1145 		    ACC_BMx_CMD_BM_CTL_ENABLE);
   1146 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM4_CMD,
   1147 		    ACC_BMx_CMD_WRITE | ACC_BMx_CMD_BYTE_ORD_EL |
   1148 		    ACC_BMx_CMD_BM_CTL_ENABLE);
   1149 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM6_CMD,
   1150 		    ACC_BMx_CMD_WRITE | ACC_BMx_CMD_BYTE_ORD_EL |
   1151 		    ACC_BMx_CMD_BM_CTL_ENABLE);
   1152 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM7_CMD,
   1153 		    ACC_BMx_CMD_WRITE | ACC_BMx_CMD_BYTE_ORD_EL |
   1154 		    ACC_BMx_CMD_BM_CTL_ENABLE);
   1155 		break;
   1156 	}
   1157 
   1158 	return 0;
   1159 }
   1160 
   1161 static int
   1162 gcscaudio_trigger_input(void *addr, void *start, void *end, int blksize,
   1163                         void (*intr)(void *), void *arg,
   1164                         const audio_params_t *param)
   1165 {
   1166 	struct gcscaudio_softc *sc;
   1167 	size_t size;
   1168 
   1169 	sc = (struct gcscaudio_softc *)addr;
   1170 	sc->sc_rec.ch_intr = intr;
   1171 	sc->sc_rec.ch_intr_arg = arg;
   1172 	size = (char *)end - (char *)start;
   1173 
   1174 	if (build_prdtables(sc, PRD_TABLE_REC, start, size, blksize, blksize, 0))
   1175 		return EINVAL;
   1176 
   1177 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ACC_BM1_PRD,
   1178 	    PRDADDR(PRD_TABLE_REC, 0));
   1179 
   1180 	/* start transfer */
   1181 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, ACC_BM1_CMD,
   1182 	    ACC_BMx_CMD_READ |
   1183 	    ACC_BMx_CMD_BYTE_ORD_EL |
   1184 	    ACC_BMx_CMD_BM_CTL_ENABLE);
   1185 
   1186 	return 0;
   1187 }
   1188 
   1189 static int
   1190 gcscaudio_intr(void *arg)
   1191 {
   1192 	struct gcscaudio_softc *sc;
   1193 	uint16_t intr;
   1194 	uint8_t bmstat;
   1195 	int nintr;
   1196 
   1197 	nintr = 0;
   1198 	sc = (struct gcscaudio_softc *)arg;
   1199 	intr = bus_space_read_2(sc->sc_iot, sc->sc_ioh, ACC_IRQ_STATUS);
   1200 	if (intr == 0)
   1201 		return 0;
   1202 
   1203 	/* Front output */
   1204 	if (intr & ACC_IRQ_STATUS_BM0_IRQ_STS) {
   1205 		bmstat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ACC_BM0_STATUS);
   1206 		if (bmstat & ACC_BMx_STATUS_BM_EOP_ERR)
   1207 			aprint_normal_dev(&sc->sc_dev, "BM0: Bus Master Error\n");
   1208 		if (!(bmstat & ACC_BMx_STATUS_EOP))
   1209 			aprint_normal_dev(&sc->sc_dev, "BM0: NO End of Page?\n");
   1210 
   1211 		if (sc->sc_play.ch_intr) {
   1212 			sc->sc_play.ch_intr(sc->sc_play.ch_intr_arg);
   1213 			channel_splitter(sc);
   1214 		}
   1215 		nintr++;
   1216 	}
   1217 
   1218 	/* Center output */
   1219 	if (intr & ACC_IRQ_STATUS_BM4_IRQ_STS) {
   1220 		bmstat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ACC_BM4_STATUS);
   1221 		if (bmstat & ACC_BMx_STATUS_BM_EOP_ERR)
   1222 			aprint_normal_dev(&sc->sc_dev, "BM4: Bus Master Error\n");
   1223 		if (!(bmstat & ACC_BMx_STATUS_EOP))
   1224 			aprint_normal_dev(&sc->sc_dev, "BM4: NO End of Page?\n");
   1225 
   1226 		nintr++;
   1227 	}
   1228 
   1229 	/* Surround output */
   1230 	if (intr & ACC_IRQ_STATUS_BM6_IRQ_STS) {
   1231 		bmstat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ACC_BM6_STATUS);
   1232 		if (bmstat & ACC_BMx_STATUS_BM_EOP_ERR)
   1233 			aprint_normal_dev(&sc->sc_dev, "BM6: Bus Master Error\n");
   1234 		if (!(bmstat & ACC_BMx_STATUS_EOP))
   1235 			aprint_normal_dev(&sc->sc_dev, "BM6: NO End of Page?\n");
   1236 
   1237 		nintr++;
   1238 	}
   1239 
   1240 	/* LowFrequencyEffect output */
   1241 	if (intr & ACC_IRQ_STATUS_BM7_IRQ_STS) {
   1242 		bmstat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ACC_BM7_STATUS);
   1243 		if (bmstat & ACC_BMx_STATUS_BM_EOP_ERR)
   1244 			aprint_normal_dev(&sc->sc_dev, "BM7: Bus Master Error\n");
   1245 		if (!(bmstat & ACC_BMx_STATUS_EOP))
   1246 			aprint_normal_dev(&sc->sc_dev, "BM7: NO End of Page?\n");
   1247 
   1248 		nintr++;
   1249 	}
   1250 
   1251 	/* record */
   1252 	if (intr & ACC_IRQ_STATUS_BM1_IRQ_STS) {
   1253 		bmstat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ACC_BM1_STATUS);
   1254 		if (bmstat & ACC_BMx_STATUS_BM_EOP_ERR)
   1255 			aprint_normal_dev(&sc->sc_dev, "BM1: Bus Master Error\n");
   1256 		if (!(bmstat & ACC_BMx_STATUS_EOP))
   1257 			aprint_normal_dev(&sc->sc_dev, "BM1: NO End of Page?\n");
   1258 
   1259 		if (sc->sc_rec.ch_intr) {
   1260 			sc->sc_rec.ch_intr(sc->sc_rec.ch_intr_arg);
   1261 		}
   1262 		nintr++;
   1263 	}
   1264 
   1265 #ifdef GCSCAUDIO_DEBUG
   1266 	if (intr & ACC_IRQ_STATUS_IRQ_STS)
   1267 		aprint_normal_dev(&sc->sc_dev, "Codec GPIO IRQ Status\n");
   1268 	if (intr & ACC_IRQ_STATUS_WU_IRQ_STS)
   1269 		aprint_normal_dev(&sc->sc_dev, "Codec GPIO Wakeup IRQ Status\n");
   1270 	if (intr & ACC_IRQ_STATUS_BM2_IRQ_STS)
   1271 		aprint_normal_dev(&sc->sc_dev, "Audio Bus Master 2 IRQ Status\n");
   1272 	if (intr & ACC_IRQ_STATUS_BM3_IRQ_STS)
   1273 		aprint_normal_dev(&sc->sc_dev, "Audio Bus Master 3 IRQ Status\n");
   1274 	if (intr & ACC_IRQ_STATUS_BM5_IRQ_STS)
   1275 		aprint_normal_dev(&sc->sc_dev, "Audio Bus Master 5 IRQ Status\n");
   1276 #endif
   1277 
   1278 	return nintr ? 1 : 0;
   1279 }
   1280 
   1281 static bool
   1282 gcscaudio_resume(device_t dv, const pmf_qual_t *qual)
   1283 {
   1284 	struct gcscaudio_softc *sc = device_private(dv);
   1285 
   1286 	gcscaudio_reset_codec(sc);
   1287 	DELAY(1000);
   1288 	(sc->codec_if->vtbl->restore_ports)(sc->codec_if);
   1289 
   1290 	return true;
   1291 }
   1292 
   1293 static int
   1294 gcscaudio_allocate_dma(struct gcscaudio_softc *sc, size_t size, void **addrp,
   1295                        bus_dma_segment_t *seglist, int nseg, int *rsegp,
   1296                        int flags, bus_dmamap_t *mapp)
   1297 {
   1298 	int error;
   1299 
   1300 	if ((error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, seglist,
   1301 	    nseg, rsegp, flags)) != 0) {
   1302 		aprint_error_dev(&sc->sc_dev,
   1303 		    "unable to allocate DMA buffer, error=%d\n", error);
   1304 		goto fail_alloc;
   1305 	}
   1306 
   1307 	if ((error = bus_dmamem_map(sc->sc_dmat, seglist, nseg, size, addrp,
   1308 	    BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
   1309 		aprint_error_dev(&sc->sc_dev,
   1310 		    "unable to map DMA buffer, error=%d\n",
   1311 		    error);
   1312 		goto fail_map;
   1313 	}
   1314 
   1315 	if ((error = bus_dmamap_create(sc->sc_dmat, size, nseg, size, 0,
   1316 	    BUS_DMA_NOWAIT, mapp)) != 0) {
   1317 		aprint_error_dev(&sc->sc_dev,
   1318 		    "unable to create DMA map, error=%d\n", error);
   1319 		goto fail_create;
   1320 	}
   1321 
   1322 	if ((error = bus_dmamap_load(sc->sc_dmat, *mapp, *addrp, size, NULL,
   1323 	    BUS_DMA_NOWAIT)) != 0) {
   1324 		aprint_error_dev(&sc->sc_dev,
   1325 		    "unable to load DMA map, error=%d\n", error);
   1326 		goto fail_load;
   1327 	}
   1328 
   1329 	return 0;
   1330 
   1331 fail_load:
   1332 	bus_dmamap_destroy(sc->sc_dmat, *mapp);
   1333 fail_create:
   1334 	bus_dmamem_unmap(sc->sc_dmat, *addrp, size);
   1335 fail_map:
   1336 	bus_dmamem_free(sc->sc_dmat, seglist, nseg);
   1337 fail_alloc:
   1338 	return error;
   1339 }
   1340