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esa.c revision 1.7
      1 /* $NetBSD: esa.c,v 1.7 2002/01/14 19:24:39 pooka Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2001, 2002 Jared D. McNeill <jmcneill (at) invisible.yi.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. The name of the author may not be used to endorse or promote products
     13  *    derived from this software without specific prior written permission.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 /*
     29  * ESS Allegro-1 / Maestro3 Audio Driver
     30  *
     31  * Based on the FreeBSD maestro3 driver and the NetBSD eap driver.
     32  * Original driver by Don Kim.
     33  */
     34 
     35 #include <sys/types.h>
     36 #include <sys/errno.h>
     37 #include <sys/null.h>
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/malloc.h>
     41 #include <sys/device.h>
     42 #include <sys/conf.h>
     43 #include <sys/exec.h>
     44 #include <sys/select.h>
     45 #include <sys/audioio.h>
     46 
     47 #include <machine/bus.h>
     48 #include <machine/intr.h>
     49 
     50 #include <dev/pci/pcidevs.h>
     51 #include <dev/pci/pcivar.h>
     52 
     53 #include <dev/audio_if.h>
     54 #include <dev/mulaw.h>
     55 #include <dev/auconv.h>
     56 #include <dev/ic/ac97var.h>
     57 #include <dev/ic/ac97reg.h>
     58 
     59 #include <dev/pci/esareg.h>
     60 #include <dev/pci/esadsp.h>
     61 #include <dev/pci/esavar.h>
     62 
     63 #define PCI_CBIO	0x10
     64 
     65 #define ESA_DAC_DATA	0x1100
     66 
     67 enum {
     68 	ESS_ALLEGRO1,
     69 	ESS_MAESTRO3
     70 };
     71 
     72 static struct esa_card_type {
     73 	u_int16_t pci_vendor_id;
     74 	u_int16_t pci_product_id;
     75 	int type;
     76 	int delay1, delay2;
     77 } esa_card_types[] = {
     78 	{ PCI_VENDOR_ESSTECH, PCI_PRODUCT_ESSTECH_ALLEGRO1,
     79 	  ESS_ALLEGRO1, 50, 800 },
     80 	{ PCI_VENDOR_ESSTECH, PCI_PRODUCT_ESSTECH_MAESTRO3,
     81 	  ESS_MAESTRO3, 20, 500 },
     82 	{ PCI_VENDOR_ESSTECH, PCI_PRODUCT_ESSTECH_MAESTRO3_2,
     83 	  ESS_MAESTRO3, 20, 500 },
     84 	{ 0, 0, 0, 0, 0 }
     85 };
     86 
     87 struct audio_device esa_device = {
     88 	"ESS Allegro",
     89 	"",
     90 	"esa"
     91 };
     92 
     93 int		esa_match(struct device *, struct cfdata *, void *);
     94 void		esa_attach(struct device *, struct device *, void *);
     95 int		esa_detach(struct device *, int);
     96 
     97 /* audio(9) functions */
     98 int		esa_open(void *, int);
     99 void		esa_close(void *);
    100 int		esa_query_encoding(void *, struct audio_encoding *);
    101 int		esa_set_params(void *, int, int, struct audio_params *,
    102 			       struct audio_params *);
    103 int		esa_round_blocksize(void *, int);
    104 int		esa_init_output(void *, void *, int);
    105 int		esa_halt_output(void *);
    106 int		esa_halt_input(void *);
    107 int		esa_set_port(void *, mixer_ctrl_t *);
    108 int		esa_get_port(void *, mixer_ctrl_t *);
    109 int		esa_query_devinfo(void *, mixer_devinfo_t *);
    110 void *		esa_malloc(void *, int, size_t, int, int);
    111 void		esa_free(void *, void *, int);
    112 int		esa_getdev(void *, struct audio_device *);
    113 size_t		esa_round_buffersize(void *, int, size_t);
    114 int		esa_get_props(void *);
    115 int		esa_trigger_output(void *, void *, void *, int,
    116 				   void (*)(void *), void *,
    117 				   struct audio_params *);
    118 int		esa_trigger_input(void *, void *, void *, int,
    119 				  void (*)(void *), void *,
    120 				  struct audio_params *);
    121 
    122 int		esa_intr(void *);
    123 int		esa_allocmem(struct esa_softc *, size_t, size_t,
    124 			     struct esa_dma *);
    125 int		esa_freemem(struct esa_softc *, struct esa_dma *);
    126 paddr_t		esa_mappage(void *addr, void *mem, off_t off, int prot);
    127 
    128 /* Supporting subroutines */
    129 u_int16_t	esa_read_assp(struct esa_softc *, u_int16_t, u_int16_t);
    130 void		esa_write_assp(struct esa_softc *, u_int16_t, u_int16_t,
    131 			       u_int16_t);
    132 int		esa_init_codec(struct esa_softc *);
    133 int		esa_attach_codec(void *, struct ac97_codec_if *);
    134 int		esa_read_codec(void *, u_int8_t, u_int16_t *);
    135 int		esa_write_codec(void *, u_int8_t, u_int16_t);
    136 void		esa_reset_codec(void *);
    137 enum ac97_host_flags	esa_flags_codec(void *);
    138 int		esa_wait(struct esa_softc *);
    139 int		esa_init(struct esa_softc *);
    140 void		esa_config(struct esa_softc *);
    141 u_int8_t	esa_assp_halt(struct esa_softc *);
    142 void		esa_codec_reset(struct esa_softc *);
    143 int		esa_amp_enable(struct esa_softc *);
    144 void		esa_enable_interrupts(struct esa_softc *);
    145 u_int32_t	esa_get_pointer(struct esa_softc *, struct esa_channel *);
    146 
    147 /* power management */
    148 int		esa_power(struct esa_softc *, int);
    149 void		esa_powerhook(int, void *);
    150 int		esa_suspend(struct esa_softc *);
    151 int		esa_resume(struct esa_softc *);
    152 
    153 struct device *	audio_attach_mi_lkm(struct audio_hw_if *, void *,
    154 				    struct device *);
    155 
    156 static audio_encoding_t esa_encoding[] = {
    157 	{ 0, AudioEulinear, AUDIO_ENCODING_ULINEAR, 8, 0 },
    158 	{ 1, AudioEmulaw, AUDIO_ENCODING_ULAW, 8,
    159 		AUDIO_ENCODINGFLAG_EMULATED },
    160 	{ 2, AudioEalaw, AUDIO_ENCODING_ALAW, 8, AUDIO_ENCODINGFLAG_EMULATED },
    161 	{ 3, AudioEslinear, AUDIO_ENCODING_SLINEAR, 8,
    162 		AUDIO_ENCODINGFLAG_EMULATED }, /* XXX: Are you sure? */
    163 	{ 4, AudioEslinear_le, AUDIO_ENCODING_SLINEAR_LE, 16, 0 },
    164 	{ 5, AudioEulinear_le, AUDIO_ENCODING_ULINEAR_LE, 16,
    165 		AUDIO_ENCODINGFLAG_EMULATED },
    166 	{ 6, AudioEslinear_be, AUDIO_ENCODING_SLINEAR_BE, 16,
    167 		AUDIO_ENCODINGFLAG_EMULATED },
    168 	{ 7, AudioEulinear_be, AUDIO_ENCODING_ULINEAR_BE, 16,
    169 		AUDIO_ENCODINGFLAG_EMULATED }
    170 };
    171 
    172 #define ESA_NENCODINGS 8
    173 
    174 struct audio_hw_if esa_hw_if = {
    175 	esa_open,
    176 	esa_close,
    177 	NULL,			/* drain */
    178 	esa_query_encoding,
    179 	esa_set_params,
    180 	esa_round_blocksize,
    181 	NULL,			/* commit_settings */
    182 	esa_init_output,
    183 	NULL,			/* esa_init_input */
    184 	NULL,			/* start_output */
    185 	NULL,			/* start_input */
    186 	esa_halt_output,
    187 	esa_halt_input,
    188 	NULL,			/* speaker_ctl */
    189 	esa_getdev,
    190 	NULL,			/* getfd */
    191 	esa_set_port,
    192 	esa_get_port,
    193 	esa_query_devinfo,
    194 	esa_malloc,
    195 	esa_free,
    196 	esa_round_buffersize,
    197 	esa_mappage,
    198 	esa_get_props,
    199 	esa_trigger_output,
    200 	esa_trigger_input
    201 };
    202 
    203 struct cfattach esa_ca = {
    204 	sizeof(struct esa_softc), esa_match, esa_attach,
    205 	esa_detach, /*esa_activate*/ NULL
    206 };
    207 
    208 /*
    209  * audio(9) functions
    210  */
    211 
    212 int
    213 esa_open(void *hdl, int flags)
    214 {
    215 
    216 	return (0);
    217 }
    218 
    219 void
    220 esa_close(void *hdl)
    221 {
    222 
    223 	return;
    224 }
    225 
    226 int
    227 esa_query_encoding(void *hdl, struct audio_encoding *ae)
    228 {
    229 
    230 	if (ae->index < 0 || ae->index >= ESA_NENCODINGS)
    231 		return (EINVAL);
    232 	*ae = esa_encoding[ae->index];
    233 
    234 	return (0);
    235 }
    236 
    237 int
    238 esa_set_params(void *hdl, int setmode, int usemode, struct audio_params *play,
    239 	       struct audio_params *rec)
    240 {
    241 	struct esa_softc *sc = hdl;
    242 	struct esa_channel *ch;
    243 	struct audio_params *p;
    244 	u_int32_t data;
    245 	u_int32_t freq;
    246 	int mode;
    247 
    248 	for (mode = AUMODE_RECORD; mode != -1;
    249 	     mode = (mode == AUMODE_RECORD) ? AUMODE_PLAY : -1) {
    250 		if ((setmode & mode) == 0)
    251 			continue;
    252 
    253 		switch (mode) {
    254 		case AUMODE_PLAY:
    255 			p = play;
    256 			ch = &sc->play;
    257 			break;
    258 		case AUMODE_RECORD:
    259 			p = rec;
    260 			ch = &sc->rec;
    261 			break;
    262 		}
    263 
    264 		if (p->sample_rate < ESA_MINRATE ||
    265 		    p->sample_rate > ESA_MAXRATE ||
    266 		    (p->precision != 8 && p->precision != 16) ||
    267 		    (p->channels < 1 && p->channels > 2))
    268 			return (EINVAL);
    269 
    270 		p->factor = 1;
    271 		p->sw_code = 0;
    272 
    273 		switch(p->encoding) {
    274 		case AUDIO_ENCODING_SLINEAR_BE:
    275 			if (p->precision == 16)
    276 				p->sw_code = swap_bytes;
    277 			else
    278 				p->sw_code = change_sign8;
    279 			break;
    280 		case AUDIO_ENCODING_SLINEAR_LE:
    281 			if (p->precision != 16)
    282 				p->sw_code = change_sign8;
    283 			break;
    284 		case AUDIO_ENCODING_ULINEAR_BE:
    285 			if (p->precision == 16) {
    286 				if (mode == AUMODE_PLAY)
    287 					p->sw_code =
    288 					    swap_bytes_change_sign16_le;
    289 				else
    290 					p->sw_code =
    291 					    change_sign16_swap_bytes_le;
    292 			}
    293 			break;
    294 		case AUDIO_ENCODING_ULINEAR_LE:
    295 			if (p->precision == 16)
    296 				p->sw_code = change_sign16_le;
    297 			break;
    298 		case AUDIO_ENCODING_ULAW:
    299 			if (mode == AUMODE_PLAY) {
    300 				p->factor = 2;
    301 				p->sw_code = mulaw_to_slinear16_le;
    302 			} else
    303 				p->sw_code = ulinear8_to_mulaw;
    304 			break;
    305 		case AUDIO_ENCODING_ALAW:
    306 			if (mode == AUMODE_PLAY) {
    307 				p->factor = 2;
    308 				p->sw_code = alaw_to_slinear16_le;
    309 			} else
    310 				p->sw_code = ulinear8_to_alaw;
    311 			break;
    312 		default:
    313 			return (EINVAL);
    314 		}
    315 
    316 		if (p->channels == 1)
    317 			data = 1;
    318 		else
    319 			data = 0;
    320 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    321 			       ch->data_offset + ESA_SRC3_MODE_OFFSET,
    322 		    data);
    323 
    324 		if (play->precision * play->factor == 8)
    325 			data = 1;
    326 		else
    327 			data = 0;
    328 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    329 			       ch->data_offset + ESA_SRC3_WORD_LENGTH_OFFSET,
    330 			       data);
    331 
    332 		if ((freq = ((p->sample_rate << 15) + 24000) / 48000) != 0) {
    333 			freq--;
    334 		}
    335 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    336 			       ch->data_offset + ESA_CDATA_FREQUENCY, freq);
    337 	}
    338 
    339 	return (0);
    340 }
    341 
    342 int
    343 esa_round_blocksize(void *hdl, int bs)
    344 {
    345 	struct esa_softc *sc = hdl;
    346 
    347 	sc->play.blksize = sc->rec.blksize = 4096;
    348 
    349 	return (sc->play.blksize);
    350 }
    351 
    352 int
    353 esa_init_output(void *hdl, void *buffer, int size)
    354 {
    355 
    356 	return (0);
    357 }
    358 
    359 int
    360 esa_halt_output(void *hdl)
    361 {
    362 	struct esa_softc *sc = hdl;
    363 
    364 	if (sc->play.active == 0)
    365 		return (0);
    366 
    367 	sc->play.active = 0;
    368 
    369 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    370 		       ESA_KDATA_INSTANCE0_MINISRC, 0);
    371 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_DMA_XFER0, 0);
    372 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_MIXER_XFER0, 0);
    373 
    374 	return (0);
    375 }
    376 
    377 int
    378 esa_halt_input(void *hdl)
    379 {
    380 	struct esa_softc *sc = hdl;
    381 	bus_space_tag_t iot = sc->sc_iot;
    382 	bus_space_handle_t ioh = sc->sc_ioh;
    383 	u_int32_t data;
    384 
    385 	if (sc->rec.active == 0)
    386 		return (0);
    387 
    388 	sc->rec.active = 0;
    389 
    390 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    391 		       ESA_KDATA_TIMER_COUNT_RELOAD, 0);
    392 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_TIMER_COUNT_CURRENT, 0);
    393 	data = bus_space_read_2(iot, ioh, ESA_HOST_INT_CTRL);
    394 	bus_space_write_2(iot, ioh, ESA_HOST_INT_CTRL, data & ~ESA_CLKRUN_GEN_ENABLE);
    395 
    396 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, sc->rec.data_offset +
    397 		       ESA_CDATA_INSTANCE_READY, 0);
    398 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_ADC1_REQUEST, 0);
    399 
    400 	return (0);
    401 }
    402 
    403 void *
    404 esa_malloc(void *hdl, int direction, size_t size, int type, int flags)
    405 {
    406 	struct esa_softc *sc = hdl;
    407 	struct esa_dma *p;
    408 	int error;
    409 
    410 	p = malloc(sizeof(*p), type, flags);
    411 	if (!p)
    412 		return (0);
    413 	error = esa_allocmem(sc, size, 16, p);
    414 	if (error) {
    415 		free(p, type);
    416 		printf("%s: esa_malloc: not enough memory\n",
    417 		    sc->sc_dev.dv_xname);
    418 		return (0);
    419 	}
    420 	p->next = sc->sc_dmas;
    421 	sc->sc_dmas = p;
    422 
    423 	return (KERNADDR(p));
    424 }
    425 
    426 void
    427 esa_free(void *hdl, void *addr, int type)
    428 {
    429 	struct esa_softc *sc = hdl;
    430 	struct esa_dma *p;
    431 	struct esa_dma **pp;
    432 
    433 	for (pp = &sc->sc_dmas; (p = *pp) != NULL; pp = &p->next)
    434 		if (KERNADDR(p) == addr) {
    435 			esa_freemem(sc, p);
    436 			*pp = p->next;
    437 			free(p, type);
    438 			return;
    439 		}
    440 }
    441 
    442 int
    443 esa_getdev(void *hdl, struct audio_device *ret)
    444 {
    445 
    446 	*ret = esa_device;
    447 
    448 	return (0);
    449 }
    450 
    451 int
    452 esa_set_port(void *hdl, mixer_ctrl_t *mc)
    453 {
    454 	struct esa_softc *sc = hdl;
    455 
    456 	return (sc->codec_if->vtbl->mixer_set_port(sc->codec_if, mc));
    457 }
    458 
    459 int
    460 esa_get_port(void *hdl, mixer_ctrl_t *mc)
    461 {
    462 	struct esa_softc *sc = hdl;
    463 
    464 	return (sc->codec_if->vtbl->mixer_get_port(sc->codec_if, mc));
    465 }
    466 
    467 int
    468 esa_query_devinfo(void *hdl, mixer_devinfo_t *di)
    469 {
    470 	struct esa_softc *sc = hdl;
    471 
    472 	return (sc->codec_if->vtbl->query_devinfo(sc->codec_if, di));
    473 }
    474 
    475 size_t
    476 esa_round_buffersize(void *hdl, int direction, size_t bufsize)
    477 {
    478 	struct esa_softc *sc = hdl;
    479 
    480 	sc->play.bufsize = sc->rec.bufsize = 65536;
    481 
    482 	return (sc->play.bufsize);
    483 }
    484 
    485 int
    486 esa_get_props(void *hdl)
    487 {
    488 
    489 	return (AUDIO_PROP_MMAP | AUDIO_PROP_INDEPENDENT | AUDIO_PROP_FULLDUPLEX);
    490 }
    491 
    492 int
    493 esa_trigger_output(void *hdl, void *start, void *end, int blksize,
    494 			void (*intr)(void *), void *intrarg,
    495 			struct audio_params *param)
    496 {
    497 	struct esa_softc *sc = hdl;
    498 	struct esa_dma *p;
    499 	bus_space_tag_t iot = sc->sc_iot;
    500 	bus_space_handle_t ioh = sc->sc_ioh;
    501 	u_int32_t data;
    502 	u_int32_t bufaddr;
    503 	u_int32_t i;
    504 	size_t size;
    505 	int data_bytes = (((ESA_MINISRC_TMP_BUFFER_SIZE & ~1) +
    506 			   (ESA_MINISRC_IN_BUFFER_SIZE & ~1) +
    507 			   (ESA_MINISRC_OUT_BUFFER_SIZE & ~1) + 4) + 255)
    508 			   &~ 255;
    509 	int dac_data = ESA_DAC_DATA + data_bytes;
    510 	int dsp_in_size = ESA_MINISRC_IN_BUFFER_SIZE - (0x20 * 2);
    511 	int dsp_out_size = ESA_MINISRC_OUT_BUFFER_SIZE - (0x20 * 2);
    512 	int dsp_in_buf = dac_data + (ESA_MINISRC_TMP_BUFFER_SIZE / 2);
    513 	int dsp_out_buf = dsp_in_buf + (dsp_in_size / 2) + 1;
    514 	sc->play.data_offset = dac_data;
    515 
    516 	if (sc->play.active)
    517 		return (EINVAL);
    518 
    519 	for (p = sc->sc_dmas; p && KERNADDR(p) != start; p = p->next)
    520 		;
    521 	if (!p) {
    522 		printf("%s: esa_trigger_output: bad addr %p\n",
    523 		    sc->sc_dev.dv_xname, start);
    524 		return (EINVAL);
    525 	}
    526 
    527 	sc->play.active = 1;
    528 	sc->play.intr = intr;
    529 	sc->play.arg = intrarg;
    530 	sc->play.pos = 0;
    531 	sc->play.count = 0;
    532 	sc->play.buf = start;
    533 	size = (size_t)(((caddr_t)end - (caddr_t)start));
    534 	bufaddr = DMAADDR(p);
    535 	sc->play.start = bufaddr;
    536 
    537 #define LO(x) ((x) & 0x0000ffff)
    538 #define HI(x) ((x) >> 16)
    539 
    540 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    541 	    ESA_CDATA_HOST_SRC_ADDRL, LO(bufaddr));
    542 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    543 	    ESA_CDATA_HOST_SRC_ADDRH, HI(bufaddr));
    544 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    545 	    ESA_CDATA_HOST_SRC_END_PLUS_1L, LO(bufaddr + size));
    546 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    547 	    ESA_CDATA_HOST_SRC_END_PLUS_1H, HI(bufaddr + size));
    548 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    549 	    ESA_CDATA_HOST_SRC_CURRENTL, LO(bufaddr));
    550 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    551 	    ESA_CDATA_HOST_SRC_CURRENTH, HI(bufaddr));
    552 
    553 	/* DSP buffers */
    554 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    555 	    ESA_CDATA_IN_BUF_BEGIN, dsp_in_buf);
    556 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    557 	    ESA_CDATA_IN_BUF_END_PLUS_1, dsp_in_buf + (dsp_in_size / 2));
    558 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    559 	    ESA_CDATA_IN_BUF_HEAD, dsp_in_buf);
    560 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    561 	    ESA_CDATA_IN_BUF_TAIL, dsp_in_buf);
    562 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    563 	    ESA_CDATA_OUT_BUF_BEGIN, dsp_out_buf);
    564 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    565 	    ESA_CDATA_OUT_BUF_END_PLUS_1, dsp_out_buf + (dsp_out_size / 2));
    566 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    567 	    ESA_CDATA_OUT_BUF_HEAD, dsp_out_buf);
    568 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    569 	    ESA_CDATA_OUT_BUF_TAIL, dsp_out_buf);
    570 
    571 	/* Some per-client initializers */
    572 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    573 	    ESA_SRC3_DIRECTION_OFFSET + 12, dac_data + 40 + 8);
    574 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    575 	    ESA_SRC3_DIRECTION_OFFSET + 19, 0x400 + ESA_MINISRC_COEF_LOC);
    576 	/* Enable or disable low-pass filter? (0xff if rate > 45000) */
    577 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    578 	    ESA_SRC3_DIRECTION_OFFSET + 22, 0);
    579 	/* Tell it which way DMA is going */
    580 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    581 	    ESA_CDATA_DMA_CONTROL,
    582 	    ESA_DMACONTROL_AUTOREPEAT + ESA_DMAC_PAGE3_SELECTOR +
    583 	    ESA_DMAC_BLOCKF_SELECTOR);
    584 
    585 	/* Set an armload of static initializers */
    586 	for (i = 0; i < (sizeof(esa_playvals) / sizeof(esa_playvals[0])); i++)
    587 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    588 		    esa_playvals[i].addr, esa_playvals[i].val);
    589 
    590 	/* Put us in the packed task lists */
    591 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    592 	    ESA_KDATA_INSTANCE0_MINISRC,
    593 	    dac_data >> ESA_DP_SHIFT_COUNT);
    594 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_DMA_XFER0,
    595 	    dac_data >> ESA_DP_SHIFT_COUNT);
    596 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_MIXER_XFER0,
    597 	    dac_data >> ESA_DP_SHIFT_COUNT);
    598 #undef LO
    599 #undef HI
    600 
    601 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    602 	    ESA_KDATA_TIMER_COUNT_RELOAD, 240);
    603 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    604 	    ESA_KDATA_TIMER_COUNT_CURRENT, 240);
    605 	data = bus_space_read_2(iot, ioh, ESA_HOST_INT_CTRL);
    606 	bus_space_write_2(iot, ioh, ESA_HOST_INT_CTRL,
    607 	    data | ESA_CLKRUN_GEN_ENABLE);
    608 
    609 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, dac_data +
    610 	    ESA_CDATA_INSTANCE_READY, 1);
    611 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    612 	    ESA_KDATA_MIXER_TASK_NUMBER, 1);
    613 
    614 	return (0);
    615 }
    616 
    617 int
    618 esa_trigger_input(void *hdl, void *start, void *end, int blksize,
    619 			void (*intr)(void *), void *intrarg,
    620 			struct audio_params *param)
    621 {
    622 	struct esa_softc *sc = hdl;
    623 	struct esa_dma *p;
    624 	bus_space_tag_t iot = sc->sc_iot;
    625 	bus_space_handle_t ioh = sc->sc_ioh;
    626 	u_int32_t data;
    627 	u_int32_t bufaddr;
    628 	u_int32_t i;
    629 	size_t size;
    630 	int data_bytes = (((ESA_MINISRC_TMP_BUFFER_SIZE & ~1) +
    631 			   (ESA_MINISRC_IN_BUFFER_SIZE & ~1) +
    632 			   (ESA_MINISRC_OUT_BUFFER_SIZE & ~1) + 4) + 255)
    633 			   &~ 255;
    634 	int adc_data = ESA_DAC_DATA + data_bytes + (data_bytes / 2);
    635 	int dsp_in_size = ESA_MINISRC_IN_BUFFER_SIZE - (0x10 * 2);
    636 	int dsp_out_size = ESA_MINISRC_OUT_BUFFER_SIZE - (0x10 * 2);
    637 	int dsp_in_buf = adc_data + (ESA_MINISRC_TMP_BUFFER_SIZE / 2);
    638 	int dsp_out_buf = dsp_in_buf + (dsp_in_size / 2) + 1;
    639 	sc->rec.data_offset = adc_data;
    640 
    641 	if (sc->rec.active)
    642 		return (EINVAL);
    643 
    644 	for (p = sc->sc_dmas; p && KERNADDR(p) != start; p = p->next)
    645 		;
    646 	if (!p) {
    647 		printf("%s: esa_trigger_input: bad addr %p\n",
    648 		    sc->sc_dev.dv_xname, start);
    649 		return (EINVAL);
    650 	}
    651 
    652 	sc->rec.active = 1;
    653 	sc->rec.intr = intr;
    654 	sc->rec.arg = intrarg;
    655 	sc->rec.pos = 0;
    656 	sc->rec.count = 0;
    657 	sc->rec.buf = start;
    658 	size = (size_t)(((caddr_t)end - (caddr_t)start));
    659 	bufaddr = DMAADDR(p);
    660 	sc->rec.start = bufaddr;
    661 
    662 #define LO(x) ((x) & 0x0000ffff)
    663 #define HI(x) ((x) >> 16)
    664 
    665 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    666 	    ESA_CDATA_HOST_SRC_ADDRL, LO(bufaddr));
    667 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    668 	    ESA_CDATA_HOST_SRC_ADDRH, HI(bufaddr));
    669 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    670 	    ESA_CDATA_HOST_SRC_END_PLUS_1L, LO(bufaddr + size));
    671 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    672 	    ESA_CDATA_HOST_SRC_END_PLUS_1H, HI(bufaddr + size));
    673 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    674 	    ESA_CDATA_HOST_SRC_CURRENTL, LO(bufaddr));
    675 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    676 	    ESA_CDATA_HOST_SRC_CURRENTH, HI(bufaddr));
    677 
    678 	/* DSP buffers */
    679 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    680 	    ESA_CDATA_IN_BUF_BEGIN, dsp_in_buf);
    681 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    682 	    ESA_CDATA_IN_BUF_END_PLUS_1, dsp_in_buf + (dsp_in_size / 2));
    683 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    684 	    ESA_CDATA_IN_BUF_HEAD, dsp_in_buf);
    685 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    686 	    ESA_CDATA_IN_BUF_TAIL, dsp_in_buf);
    687 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    688 	    ESA_CDATA_OUT_BUF_BEGIN, dsp_out_buf);
    689 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    690 	    ESA_CDATA_OUT_BUF_END_PLUS_1, dsp_out_buf + (dsp_out_size / 2));
    691 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    692 	    ESA_CDATA_OUT_BUF_HEAD, dsp_out_buf);
    693 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    694 	    ESA_CDATA_OUT_BUF_TAIL, dsp_out_buf);
    695 
    696 	/* Some per-client initializers */
    697 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    698 	    ESA_SRC3_DIRECTION_OFFSET + 12, adc_data + 40 + 8);
    699 	/* Tell it which way DMA is going */
    700 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    701 	    ESA_CDATA_DMA_CONTROL,
    702 	    ESA_DMACONTROL_DIRECTION + ESA_DMACONTROL_AUTOREPEAT +
    703 	    ESA_DMAC_PAGE3_SELECTOR + ESA_DMAC_BLOCKF_SELECTOR);
    704 
    705 	/* Set an armload of static initializers */
    706 	for (i = 0; i < (sizeof(esa_recvals) / sizeof(esa_recvals[0])); i++)
    707 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    708 		    esa_recvals[i].addr, esa_recvals[i].val);
    709 
    710 	/* Put us in the packed task lists */
    711 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    712 	    ESA_KDATA_INSTANCE0_MINISRC,
    713 	    adc_data >> ESA_DP_SHIFT_COUNT);
    714 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_DMA_XFER0,
    715 	    adc_data >> ESA_DP_SHIFT_COUNT);
    716 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_ADC1_XFER0,
    717 	    adc_data >> ESA_DP_SHIFT_COUNT);
    718 #undef LO
    719 #undef HI
    720 
    721 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    722 	    ESA_KDATA_TIMER_COUNT_RELOAD, 240);
    723 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
    724 	    ESA_KDATA_TIMER_COUNT_CURRENT, 240);
    725 	data = bus_space_read_2(iot, ioh, ESA_HOST_INT_CTRL);
    726 	bus_space_write_2(iot, ioh, ESA_HOST_INT_CTRL,
    727 	    data | ESA_CLKRUN_GEN_ENABLE);
    728 
    729 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_ADC1_REQUEST, 1);
    730 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, adc_data +
    731 	    ESA_CDATA_INSTANCE_READY, 1);
    732 
    733 	return (0);
    734 }
    735 
    736 /* Interrupt handler */
    737 
    738 int
    739 esa_intr(void *hdl)
    740 {
    741 	struct esa_softc *sc = hdl;
    742 	bus_space_tag_t iot = sc->sc_iot;
    743 	bus_space_handle_t ioh = sc->sc_ioh;
    744 	u_int32_t status, ctl;
    745 	u_int32_t pos;
    746 	u_int32_t diff;
    747 	u_int32_t play_blksize = sc->play.blksize;
    748 	u_int32_t play_bufsize = sc->play.bufsize;
    749 	u_int32_t rec_blksize = sc->rec.blksize;
    750 	u_int32_t rec_bufsize = sc->rec.bufsize;
    751 
    752 	status = bus_space_read_1(iot, ioh, ESA_HOST_INT_STATUS);
    753 	if (!status)
    754 		return (0);
    755 
    756 	/* ack the interrupt */
    757 	bus_space_write_1(iot, ioh, ESA_HOST_INT_STATUS, 0xff);
    758 
    759 	if (status & ESA_HV_INT_PENDING) {
    760 		u_int8_t event;
    761 
    762 		printf("%s: hardware volume interrupt\n", sc->sc_dev.dv_xname);
    763 		event = bus_space_read_1(iot, ioh, ESA_HW_VOL_COUNTER_MASTER);
    764 		switch(event) {
    765 		case 0x99:
    766 		case 0xaa:
    767 		case 0x66:
    768 		case 0x88:
    769 			printf("%s: esa_intr: FIXME\n", sc->sc_dev.dv_xname);
    770 			break;
    771 		default:
    772 			printf("%s: unknown hwvol event 0x%02x\n",
    773 			    sc->sc_dev.dv_xname, event);
    774 			break;
    775 		}
    776 		bus_space_write_1(iot, ioh, ESA_HW_VOL_COUNTER_MASTER, 0x88);
    777 	}
    778 
    779 	if (status & ESA_ASSP_INT_PENDING) {
    780 		ctl = bus_space_read_1(iot, ioh, ESA_ASSP_CONTROL_B);
    781 		if (!(ctl & ESA_STOP_ASSP_CLOCK)) {
    782 			ctl = bus_space_read_1(iot, ioh,
    783 					       ESA_ASSP_HOST_INT_STATUS);
    784 			if (ctl & ESA_DSP2HOST_REQ_TIMER) {
    785 				bus_space_write_1(iot, ioh,
    786 				    ESA_ASSP_HOST_INT_STATUS,
    787 				    ESA_DSP2HOST_REQ_TIMER);
    788 				if (sc->play.active) {
    789 					pos = esa_get_pointer(sc, &sc->play)
    790 					    % play_bufsize;
    791 					diff = (play_bufsize + pos - sc->play.pos)
    792 					    % play_bufsize;
    793 					sc->play.pos = pos;
    794 					sc->play.count += diff;
    795 					while(sc->play.count >= play_blksize) {
    796 						sc->play.count -= play_blksize;
    797 						(*sc->play.intr)(sc->play.arg);
    798 					}
    799 				}
    800 				if (sc->rec.active) {
    801 					pos = esa_get_pointer(sc, &sc->rec)
    802 					    % rec_bufsize;
    803 					diff = (rec_bufsize + pos - sc->rec.pos)
    804 					    % rec_bufsize;
    805 					sc->rec.pos = pos;
    806 					sc->rec.count += diff;
    807 					while(sc->rec.count >= rec_blksize) {
    808 						sc->rec.count -= rec_blksize;
    809 						(*sc->rec.intr)(sc->rec.arg);
    810 					}
    811 				}
    812 			}
    813 		}
    814 	}
    815 
    816 	return (1);
    817 }
    818 
    819 int
    820 esa_allocmem(struct esa_softc *sc, size_t size, size_t align,
    821 		struct esa_dma *p)
    822 {
    823 	int error;
    824 
    825 	p->size = size;
    826 	error = bus_dmamem_alloc(sc->sc_dmat, p->size, align, 0,
    827 				 p->segs, sizeof(p->segs) / sizeof(p->segs[0]),
    828 				 &p->nsegs, BUS_DMA_NOWAIT);
    829 	if (error)
    830 		return (error);
    831 
    832 	error = bus_dmamem_map(sc->sc_dmat, p->segs, p->nsegs, p->size,
    833 				&p->addr, BUS_DMA_NOWAIT | BUS_DMA_COHERENT);
    834 	if (error)
    835 		goto free;
    836 
    837 	error = bus_dmamap_create(sc->sc_dmat, p->size, 1, p->size, 0,
    838 				  BUS_DMA_NOWAIT, &p->map);
    839 	if (error)
    840 		goto unmap;
    841 
    842 	error = bus_dmamap_load(sc->sc_dmat, p->map, p->addr, p->size, NULL,
    843 				BUS_DMA_NOWAIT);
    844 	if (error)
    845 		goto destroy;
    846 
    847 	return (0);
    848 
    849 destroy:
    850 	bus_dmamap_destroy(sc->sc_dmat, p->map);
    851 unmap:
    852 	bus_dmamem_unmap(sc->sc_dmat, p->addr, p->size);
    853 free:
    854 	bus_dmamem_free(sc->sc_dmat, p->segs, p->nsegs);
    855 
    856 	return (error);
    857 }
    858 
    859 int
    860 esa_freemem(struct esa_softc *sc, struct esa_dma *p)
    861 {
    862 
    863 	bus_dmamap_unload(sc->sc_dmat, p->map);
    864 	bus_dmamap_destroy(sc->sc_dmat, p->map);
    865 	bus_dmamem_unmap(sc->sc_dmat, p->addr, p->size);
    866 	bus_dmamem_free(sc->sc_dmat, p->segs, p->nsegs);
    867 
    868 	return (0);
    869 }
    870 
    871 /*
    872  * Supporting Subroutines
    873  */
    874 
    875 int
    876 esa_match(struct device *dev, struct cfdata *match, void *aux)
    877 {
    878 	struct pci_attach_args *pa = (struct pci_attach_args *)aux;
    879 
    880 	switch(PCI_VENDOR(pa->pa_id)) {
    881 	case PCI_VENDOR_ESSTECH:
    882 		switch(PCI_PRODUCT(pa->pa_id)) {
    883 		case PCI_PRODUCT_ESSTECH_ALLEGRO1:
    884 		case PCI_PRODUCT_ESSTECH_MAESTRO3:
    885 		case PCI_PRODUCT_ESSTECH_MAESTRO3_2:
    886 			return (1);
    887 		}
    888 	}
    889 
    890 	return (0);
    891 }
    892 
    893 void
    894 esa_attach(struct device *parent, struct device *self, void *aux)
    895 {
    896 	struct esa_softc *sc = (struct esa_softc *)self;
    897 	struct pci_attach_args *pa = (struct pci_attach_args *)aux;
    898 	pcitag_t tag = pa->pa_tag;
    899 	pci_chipset_tag_t pc = pa->pa_pc;
    900 	pci_intr_handle_t ih;
    901 	struct esa_card_type *card;
    902 	const char *intrstr;
    903 	u_int32_t data;
    904 	char devinfo[256];
    905 	int revision, len;
    906 
    907 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
    908 	revision = PCI_REVISION(pa->pa_class);
    909 	printf(": %s (rev. 0x%02x)\n", devinfo, revision);
    910 
    911 	for (card = esa_card_types; card->pci_vendor_id; card++)
    912 		if (PCI_VENDOR(pa->pa_id) == card->pci_vendor_id &&
    913 		    PCI_PRODUCT(pa->pa_id) == card->pci_product_id) {
    914 			sc->type = card->type;
    915 			sc->delay1 = card->delay1;
    916 			sc->delay2 = card->delay2;
    917 			break;
    918 		}
    919 
    920 	data = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
    921 	data |= (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE
    922 	    | PCI_COMMAND_MASTER_ENABLE);
    923 	pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, data);
    924 
    925 	/* Map I/O register */
    926 	if (pci_mapreg_map(pa, PCI_CBIO, PCI_MAPREG_TYPE_IO, 0,
    927 	    &sc->sc_iot, &sc->sc_ioh, &sc->sc_iob, &sc->sc_ios)) {
    928 		printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
    929 		return;
    930 	}
    931 
    932 	/* Initialize softc */
    933 	sc->sc_tag = tag;
    934 	sc->sc_pct = pc;
    935 	sc->sc_dmat = pa->pa_dmat;
    936 
    937 	/* Map and establish an interrupt */
    938 	if (pci_intr_map(pa, &ih)) {
    939 		printf("%s: can't map interrupt\n", sc->sc_dev.dv_xname);
    940 		return;
    941 	}
    942 	intrstr = pci_intr_string(pc, ih);
    943 	sc->sc_ih = pci_intr_establish(pc, ih, IPL_AUDIO, esa_intr, self);
    944 	if (sc->sc_ih == NULL) {
    945 		printf("%s: can't establish interrupt", sc->sc_dev.dv_xname);
    946 		if (intrstr != NULL)
    947 			printf(" at %s", intrstr);
    948 		printf("\n");
    949 		return;
    950 	}
    951 	printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
    952 
    953 	/* Power up chip */
    954 	esa_power(sc, PCI_PMCSR_STATE_D0);
    955 
    956 	/* Init chip */
    957 	if (esa_init(sc) == -1) {
    958 		printf("%s: esa_attach: unable to initialize the card\n",
    959 		    sc->sc_dev.dv_xname);
    960 		return;
    961 	}
    962 
    963 	/* create suspend save area */
    964 	len = sizeof(u_int16_t) * (ESA_REV_B_CODE_MEMORY_LENGTH
    965 	    + ESA_REV_B_DATA_MEMORY_LENGTH + 1);
    966 	sc->savemem = (u_int16_t *)malloc(len, M_DEVBUF, M_NOWAIT | M_ZERO);
    967 	if (sc->savemem == NULL) {
    968 		printf("%s: unable to allocate suspend buffer\n",
    969 		    sc->sc_dev.dv_xname);
    970 		return;
    971 	}
    972 
    973 	/*
    974 	 * Every card I've seen has had their channels swapped with respect
    975 	 * to the mixer. Ie:
    976 	 *  $ mixerctl -w outputs.master=0,191
    977 	 * Would result in the _right_ speaker being turned off.
    978 	 *
    979 	 * So, we will swap the left and right mixer channels to compensate
    980 	 * for this.
    981 	 */
    982 	sc->codec_flags |= AC97_HOST_SWAPPED_CHANNELS;
    983 	sc->codec_flags |= AC97_HOST_DONT_READ;
    984 
    985 	/* Attach AC97 host interface */
    986 	sc->host_if.arg = self;
    987 	sc->host_if.attach = esa_attach_codec;
    988 	sc->host_if.read = esa_read_codec;
    989 	sc->host_if.write = esa_write_codec;
    990 	sc->host_if.reset = esa_reset_codec;
    991 	sc->host_if.flags = esa_flags_codec;
    992 
    993 	if (ac97_attach(&sc->host_if) != 0)
    994 		return;
    995 
    996 	sc->sc_audiodev = audio_attach_mi(&esa_hw_if, self, &sc->sc_dev);
    997 
    998 	sc->powerhook = powerhook_establish(esa_powerhook, sc);
    999 	if (sc->powerhook == NULL)
   1000 		printf("%s: WARNING: unable to establish powerhook\n",
   1001 		    sc->sc_dev.dv_xname);
   1002 
   1003 	return;
   1004 }
   1005 
   1006 int
   1007 esa_detach(struct device *self, int flags)
   1008 {
   1009 	struct esa_softc *sc = (struct esa_softc *)self;
   1010 	int rv = 0;
   1011 
   1012 	if (sc->sc_audiodev != NULL)
   1013 		rv = config_detach(sc->sc_audiodev, flags);
   1014 	if (rv)
   1015 		return (rv);
   1016 
   1017 	if (sc->sc_ih != NULL)
   1018 		pci_intr_disestablish(sc->sc_pct, sc->sc_ih);
   1019 	if (sc->sc_ios)
   1020 		bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
   1021 
   1022 	return (0);
   1023 }
   1024 
   1025 u_int16_t
   1026 esa_read_assp(struct esa_softc *sc, u_int16_t region, u_int16_t index)
   1027 {
   1028 	u_int16_t data;
   1029 	bus_space_tag_t iot = sc->sc_iot;
   1030 	bus_space_handle_t ioh = sc->sc_ioh;
   1031 
   1032 	bus_space_write_2(iot, ioh, ESA_DSP_PORT_MEMORY_TYPE,
   1033 	    region & ESA_MEMTYPE_MASK);
   1034 	bus_space_write_2(iot, ioh, ESA_DSP_PORT_MEMORY_INDEX, index);
   1035 	data = bus_space_read_2(iot, ioh, ESA_DSP_PORT_MEMORY_DATA);
   1036 
   1037 	return (data);
   1038 }
   1039 
   1040 void
   1041 esa_write_assp(struct esa_softc *sc, u_int16_t region, u_int16_t index,
   1042 		u_int16_t data)
   1043 {
   1044 	bus_space_tag_t iot = sc->sc_iot;
   1045 	bus_space_handle_t ioh = sc->sc_ioh;
   1046 
   1047 	bus_space_write_2(iot, ioh, ESA_DSP_PORT_MEMORY_TYPE,
   1048 	    region & ESA_MEMTYPE_MASK);
   1049 	bus_space_write_2(iot, ioh, ESA_DSP_PORT_MEMORY_INDEX, index);
   1050 	bus_space_write_2(iot, ioh, ESA_DSP_PORT_MEMORY_DATA, data);
   1051 
   1052 	return;
   1053 }
   1054 
   1055 int
   1056 esa_init_codec(struct esa_softc *sc)
   1057 {
   1058 	bus_space_tag_t iot = sc->sc_iot;
   1059 	bus_space_handle_t ioh = sc->sc_ioh;
   1060 	u_int32_t data;
   1061 
   1062 	data = bus_space_read_1(iot, ioh, ESA_CODEC_COMMAND);
   1063 
   1064 	return ((data & 0x1) ? 0 : 1);
   1065 }
   1066 
   1067 int
   1068 esa_attach_codec(void *aux, struct ac97_codec_if *codec_if)
   1069 {
   1070 	struct esa_softc *sc = aux;
   1071 
   1072 	sc->codec_if = codec_if;
   1073 
   1074 	return (0);
   1075 }
   1076 
   1077 int
   1078 esa_read_codec(void *aux, u_int8_t reg, u_int16_t *result)
   1079 {
   1080 	struct esa_softc *sc = aux;
   1081 	bus_space_tag_t iot = sc->sc_iot;
   1082 	bus_space_handle_t ioh = sc->sc_ioh;
   1083 
   1084 	if (esa_wait(sc))
   1085 		printf("%s: esa_read_codec: timed out\n", sc->sc_dev.dv_xname);
   1086 	bus_space_write_1(iot, ioh, ESA_CODEC_COMMAND, (reg & 0x7f) | 0x80);
   1087 	delay(50);
   1088 	if (esa_wait(sc))
   1089 		printf("%s: esa_read_codec: timed out\n", sc->sc_dev.dv_xname);
   1090 	*result = bus_space_read_2(iot, ioh, ESA_CODEC_DATA);
   1091 
   1092 	return (0);
   1093 }
   1094 
   1095 int
   1096 esa_write_codec(void *aux, u_int8_t reg, u_int16_t data)
   1097 {
   1098 	struct esa_softc *sc = aux;
   1099 	bus_space_tag_t iot = sc->sc_iot;
   1100 	bus_space_handle_t ioh = sc->sc_ioh;
   1101 
   1102 	if (esa_wait(sc)) {
   1103 		printf("%s: esa_write_codec: timed out\n", sc->sc_dev.dv_xname);
   1104 		return (-1);
   1105 	}
   1106 	bus_space_write_2(iot, ioh, ESA_CODEC_DATA, data);
   1107 	bus_space_write_1(iot, ioh, ESA_CODEC_COMMAND, reg & 0x7f);
   1108 	delay(50);
   1109 
   1110 	return (0);
   1111 }
   1112 
   1113 void
   1114 esa_reset_codec(void *aux)
   1115 {
   1116 
   1117 	return;
   1118 }
   1119 
   1120 enum ac97_host_flags
   1121 esa_flags_codec(void *aux)
   1122 {
   1123 	struct esa_softc *sc = aux;
   1124 
   1125 	return (sc->codec_flags);
   1126 }
   1127 
   1128 int
   1129 esa_wait(struct esa_softc *sc)
   1130 {
   1131 	int i, val;
   1132 	bus_space_tag_t iot = sc->sc_iot;
   1133 	bus_space_handle_t ioh = sc->sc_ioh;
   1134 
   1135 	for (i = 0; i < 20; i++) {
   1136 		val = bus_space_read_1(iot, ioh, ESA_CODEC_STATUS);
   1137 		if ((val & 1) == 0)
   1138 			return (0);
   1139 		delay(2);
   1140 	}
   1141 
   1142 	return (-1);
   1143 }
   1144 
   1145 int
   1146 esa_init(struct esa_softc *sc)
   1147 {
   1148 	bus_space_tag_t iot = sc->sc_iot;
   1149 	bus_space_handle_t ioh = sc->sc_ioh;
   1150 	pcitag_t tag = sc->sc_tag;
   1151 	pci_chipset_tag_t pc = sc->sc_pct;
   1152 	u_int32_t data, i, size;
   1153 	u_int8_t reset_state;
   1154 	int data_bytes = (((ESA_MINISRC_TMP_BUFFER_SIZE & ~1) +
   1155 			   (ESA_MINISRC_IN_BUFFER_SIZE & ~1) +
   1156 			   (ESA_MINISRC_OUT_BUFFER_SIZE & ~1) + 4) + 255)
   1157 			   &~ 255;
   1158 
   1159 	/* Disable legacy emulation */
   1160 	data = pci_conf_read(pc, tag, PCI_LEGACY_AUDIO_CTRL);
   1161 	data |= DISABLE_LEGACY;
   1162 	pci_conf_write(pc, tag, PCI_LEGACY_AUDIO_CTRL, data);
   1163 
   1164 	esa_config(sc);
   1165 
   1166 	reset_state = esa_assp_halt(sc);
   1167 
   1168 	esa_init_codec(sc);
   1169 	esa_codec_reset(sc);
   1170 
   1171 	/* Zero kernel and mixer data */
   1172 	size = ESA_REV_B_DATA_MEMORY_UNIT_LENGTH * ESA_NUM_UNITS_KERNEL_DATA;
   1173 	for (i = 0; i < size / 2; i++) {
   1174 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
   1175 		    ESA_KDATA_BASE_ADDR + i, 0);
   1176 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
   1177 		    ESA_KDATA_BASE_ADDR2 + i, 0);
   1178 	}
   1179 
   1180 	/* Init DMA pointer */
   1181 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_CURRENT_DMA,
   1182 	    ESA_KDATA_DMA_XFER0);
   1183 
   1184 	/* Write kernel code into memory */
   1185 	size = sizeof(esa_assp_kernel_image);
   1186 	for (i = 0; i < size / 2; i++)
   1187 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_CODE,
   1188 		    ESA_REV_B_CODE_MEMORY_BEGIN + i, esa_assp_kernel_image[i]);
   1189 
   1190 	size = sizeof(esa_assp_minisrc_image);
   1191 	for (i = 0; i < size / 2; i++)
   1192 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_CODE, 0x400 + i,
   1193 		    esa_assp_minisrc_image[i]);
   1194 
   1195 	/* Write the coefficients for the low pass filter */
   1196 	size = sizeof(esa_minisrc_lpf_image);
   1197 	for (i = 0; i < size / 2; i++)
   1198 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_CODE,
   1199 		    0x400 + ESA_MINISRC_COEF_LOC + i, esa_minisrc_lpf_image[i]);
   1200 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_CODE,
   1201 	    0x400 + ESA_MINISRC_COEF_LOC + size, 0x8000);
   1202 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_TASK0, 0x400);
   1203 	/* Init the mixer number */
   1204 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
   1205              ESA_KDATA_MIXER_TASK_NUMBER, 0);
   1206 	/* Extreme kernel master volume */
   1207 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_DAC_LEFT_VOLUME,
   1208 	    ESA_ARB_VOLUME);
   1209 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA,
   1210             ESA_KDATA_DAC_RIGHT_VOLUME, ESA_ARB_VOLUME);
   1211 
   1212 	if (esa_amp_enable(sc))
   1213 		return (-1);
   1214 
   1215 	/* Zero entire DAC/ADC area */
   1216 	for (i = 0x1100; i < 0x1c00; i++)
   1217 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, i, 0);
   1218 
   1219 	/* set some sane defaults */
   1220 	sc->play.data_offset = ESA_DAC_DATA + data_bytes;
   1221 	sc->rec.data_offset = ESA_DAC_DATA + data_bytes + (data_bytes / 2);
   1222 
   1223 	esa_enable_interrupts(sc);
   1224 
   1225 	bus_space_write_1(iot, ioh, ESA_DSP_PORT_CONTROL_REG_B,
   1226 	    reset_state | ESA_REGB_ENABLE_RESET);
   1227 
   1228 	return (0);
   1229 }
   1230 
   1231 void
   1232 esa_config(struct esa_softc *sc)
   1233 {
   1234 	bus_space_tag_t iot = sc->sc_iot;
   1235 	bus_space_handle_t ioh = sc->sc_ioh;
   1236 	pcitag_t tag = sc->sc_tag;
   1237 	pci_chipset_tag_t pc = sc->sc_pct;
   1238 	u_int32_t data;
   1239 
   1240 	data = pci_conf_read(pc, tag, ESA_PCI_ALLEGRO_CONFIG);
   1241 	data &= ESA_REDUCED_DEBOUNCE;
   1242 	data |= ESA_PM_CTRL_ENABLE | ESA_CLK_DIV_BY_49 | ESA_USE_PCI_TIMING;
   1243 	pci_conf_write(pc, tag, ESA_PCI_ALLEGRO_CONFIG, data);
   1244 
   1245 	bus_space_write_1(iot, ioh, ESA_ASSP_CONTROL_B, ESA_RESET_ASSP);
   1246 	data = pci_conf_read(pc, tag, ESA_PCI_ALLEGRO_CONFIG);
   1247 	data &= ~ESA_INT_CLK_SELECT;
   1248 	if (sc->type == ESS_MAESTRO3) {
   1249 		data &= ~ESA_INT_CLK_MULT_ENABLE;
   1250 		data |= ESA_INT_CLK_SRC_NOT_PCI;
   1251 	}
   1252 	data &= ~(ESA_CLK_MULT_MODE_SELECT | ESA_CLK_MULT_MODE_SELECT_2);
   1253 	pci_conf_write(pc, tag, ESA_PCI_ALLEGRO_CONFIG, data);
   1254 
   1255 	if (sc->type == ESS_ALLEGRO1) {
   1256 		data = pci_conf_read(pc, tag, ESA_PCI_USER_CONFIG);
   1257 		data |= ESA_IN_CLK_12MHZ_SELECT;
   1258 		pci_conf_write(pc, tag, ESA_PCI_USER_CONFIG, data);
   1259 	}
   1260 
   1261 	data = bus_space_read_1(iot, ioh, ESA_ASSP_CONTROL_A);
   1262 	data &= ~(ESA_DSP_CLK_36MHZ_SELECT | ESA_ASSP_CLK_49MHZ_SELECT);
   1263 	data |= ESA_ASSP_CLK_49MHZ_SELECT;	/* XXX: Assumes 49MHz DSP */
   1264 	data |= ESA_ASSP_0_WS_ENABLE;
   1265 	bus_space_write_1(iot, ioh, ESA_ASSP_CONTROL_A, data);
   1266 
   1267 	bus_space_write_1(iot, ioh, ESA_ASSP_CONTROL_B, ESA_RUN_ASSP);
   1268 
   1269 	return;
   1270 }
   1271 
   1272 u_int8_t
   1273 esa_assp_halt(struct esa_softc *sc)
   1274 {
   1275 	bus_space_tag_t iot = sc->sc_iot;
   1276 	bus_space_handle_t ioh = sc->sc_ioh;
   1277 	u_int8_t data, reset_state;
   1278 
   1279 	data = bus_space_read_1(iot, ioh, ESA_DSP_PORT_CONTROL_REG_B);
   1280 	reset_state = data & ~ESA_REGB_STOP_CLOCK;
   1281 	delay(10000);		/* XXX use tsleep */
   1282 	bus_space_write_1(iot, ioh, ESA_DSP_PORT_CONTROL_REG_B,
   1283 			reset_state & ~ESA_REGB_ENABLE_RESET);
   1284 	delay(10000);		/* XXX use tsleep */
   1285 
   1286 	return (reset_state);
   1287 }
   1288 
   1289 void
   1290 esa_codec_reset(struct esa_softc *sc)
   1291 {
   1292 	bus_space_tag_t iot = sc->sc_iot;
   1293 	bus_space_handle_t ioh = sc->sc_ioh;
   1294 	u_int16_t data, dir;
   1295 	int retry = 0;
   1296 
   1297 	do {
   1298 		data = bus_space_read_2(iot, ioh, ESA_GPIO_DIRECTION);
   1299 		dir = data | 0x10; /* assuming pci bus master? */
   1300 
   1301 		/* remote codec config */
   1302 		data = bus_space_read_2(iot, ioh, ESA_RING_BUS_CTRL_B);
   1303 		bus_space_write_2(iot, ioh, ESA_RING_BUS_CTRL_B,
   1304 		    data & ~ESA_SECOND_CODEC_ID_MASK);
   1305 		data = bus_space_read_2(iot, ioh, ESA_SDO_OUT_DEST_CTRL);
   1306 		bus_space_write_2(iot, ioh, ESA_SDO_OUT_DEST_CTRL,
   1307 		    data & ~ESA_COMMAND_ADDR_OUT);
   1308 		data = bus_space_read_2(iot, ioh, ESA_SDO_IN_DEST_CTRL);
   1309 		bus_space_write_2(iot, ioh, ESA_SDO_IN_DEST_CTRL,
   1310 		    data & ~ESA_STATUS_ADDR_IN);
   1311 
   1312 		bus_space_write_2(iot, ioh, ESA_RING_BUS_CTRL_A,
   1313 				  ESA_IO_SRAM_ENABLE);
   1314 		delay(20);
   1315 
   1316 		bus_space_write_2(iot, ioh, ESA_GPIO_DIRECTION,
   1317 		    dir & ~ESA_GPO_PRIMARY_AC97);
   1318 		bus_space_write_2(iot, ioh, ESA_GPIO_MASK,
   1319 				  ~ESA_GPO_PRIMARY_AC97);
   1320 		bus_space_write_2(iot, ioh, ESA_GPIO_DATA, 0);
   1321 		bus_space_write_2(iot, ioh, ESA_GPIO_DIRECTION,
   1322 		    dir | ESA_GPO_PRIMARY_AC97);
   1323 		delay(sc->delay1 * 1000);
   1324 		bus_space_write_2(iot, ioh, ESA_GPIO_DATA,
   1325 				  ESA_GPO_PRIMARY_AC97);
   1326 		delay(5);
   1327 		bus_space_write_2(iot, ioh, ESA_RING_BUS_CTRL_A,
   1328 		    ESA_IO_SRAM_ENABLE | ESA_SERIAL_AC_LINK_ENABLE);
   1329 		bus_space_write_2(iot, ioh, ESA_GPIO_MASK, ~0);
   1330 		delay(sc->delay2 * 1000);
   1331 
   1332 		esa_read_codec(sc, 0x7c, &data);
   1333 		if ((data == 0) || (data == 0xffff)) {
   1334 			retry++;
   1335 			if (retry > 3) {
   1336 				printf("%s: esa_codec_reset: failed\n",
   1337 				    sc->sc_dev.dv_xname);
   1338 				break;
   1339 			}
   1340 			printf("%s: esa_codec_reset: retrying\n",
   1341 			    sc->sc_dev.dv_xname);
   1342 		} else
   1343 			retry = 0;
   1344 	} while (retry);
   1345 
   1346 	return;
   1347 }
   1348 
   1349 int
   1350 esa_amp_enable(struct esa_softc *sc)
   1351 {
   1352 	bus_space_tag_t iot = sc->sc_iot;
   1353 	bus_space_handle_t ioh = sc->sc_ioh;
   1354 	u_int32_t gpo, polarity_port, polarity;
   1355 	u_int16_t data;
   1356 
   1357 	switch (sc->type) {
   1358 	case ESS_ALLEGRO1:
   1359 		polarity_port = 0x1800;
   1360 		break;
   1361 	case ESS_MAESTRO3:
   1362 		polarity_port = 0x1100;
   1363 		break;
   1364 	default:
   1365 		printf("%s: esa_amp_enable: Unknown chip type!!!\n",
   1366 		    sc->sc_dev.dv_xname);
   1367 		return (1);
   1368 	}
   1369 
   1370 	gpo = (polarity_port >> 8) & 0x0f;
   1371 	polarity = polarity_port >> 12;
   1372 	polarity = !polarity;	/* Enable */
   1373 	polarity = polarity << gpo;
   1374 	gpo = 1 << gpo;
   1375 	bus_space_write_2(iot, ioh, ESA_GPIO_MASK, ~gpo);
   1376 	data = bus_space_read_2(iot, ioh, ESA_GPIO_DIRECTION);
   1377 	bus_space_write_2(iot, ioh, ESA_GPIO_DIRECTION, data | gpo);
   1378 	data = ESA_GPO_SECONDARY_AC97 | ESA_GPO_PRIMARY_AC97 | polarity;
   1379 	bus_space_write_2(iot, ioh, ESA_GPIO_DATA, data);
   1380 	bus_space_write_2(iot, ioh, ESA_GPIO_MASK, ~0);
   1381 
   1382 	return (0);
   1383 }
   1384 
   1385 void
   1386 esa_enable_interrupts(struct esa_softc *sc)
   1387 {
   1388 	bus_space_tag_t iot = sc->sc_iot;
   1389 	bus_space_handle_t ioh = sc->sc_ioh;
   1390 	u_int8_t data;
   1391 
   1392 	bus_space_write_2(iot, ioh, ESA_HOST_INT_CTRL,
   1393 	    ESA_ASSP_INT_ENABLE | ESA_HV_INT_ENABLE);
   1394 	data = bus_space_read_1(iot, ioh, ESA_ASSP_CONTROL_C);
   1395 	bus_space_write_1(iot, ioh, ESA_ASSP_CONTROL_C,
   1396 	    data | ESA_ASSP_HOST_INT_ENABLE);
   1397 }
   1398 
   1399 int
   1400 esa_power(struct esa_softc *sc, int state)
   1401 {
   1402 	pcitag_t tag = sc->sc_tag;
   1403 	pci_chipset_tag_t pc = sc->sc_pct;
   1404 	pcireg_t data;
   1405 	int pmcapreg;
   1406 
   1407 	if (pci_get_capability(pc, tag, PCI_CAP_PWRMGMT, &pmcapreg, 0)) {
   1408 		data = pci_conf_read(pc, tag, pmcapreg + 4);
   1409 		if ((data && PCI_PMCSR_STATE_MASK) != state)
   1410 			pci_conf_write(pc, tag, pmcapreg + 4, state);
   1411 	}
   1412 
   1413 	return (0);
   1414 }
   1415 
   1416 void
   1417 esa_powerhook(int why, void *hdl)
   1418 {
   1419 	struct esa_softc *sc = (struct esa_softc *)hdl;
   1420 
   1421 	switch (why) {
   1422 	case PWR_SUSPEND:
   1423 	case PWR_STANDBY:
   1424 		esa_suspend(sc);
   1425 		break;
   1426 	case PWR_RESUME:
   1427 		esa_resume(sc);
   1428 		(sc->codec_if->vtbl->restore_ports)(sc->codec_if);
   1429 		break;
   1430 	}
   1431 }
   1432 
   1433 int
   1434 esa_suspend(struct esa_softc *sc)
   1435 {
   1436 	bus_space_tag_t iot = sc->sc_iot;
   1437 	bus_space_handle_t ioh = sc->sc_ioh;
   1438 	int x, i, index;
   1439 
   1440 	index = 0;
   1441 
   1442 	x = splaudio();
   1443 	esa_halt_output(sc);
   1444 	delay(10000);
   1445 	splx(x);
   1446 
   1447 	bus_space_write_2(iot, ioh, ESA_HOST_INT_CTRL, 0);
   1448 	bus_space_write_1(iot, ioh, ESA_ASSP_CONTROL_C, 0);
   1449 
   1450 	esa_assp_halt(sc);
   1451 
   1452 	/* Save ASSP state */
   1453 	for (i = ESA_REV_B_CODE_MEMORY_BEGIN; i <= ESA_REV_B_CODE_MEMORY_END;
   1454 	    i++)
   1455 		sc->savemem[index++] = esa_read_assp(sc,
   1456 		    ESA_MEMTYPE_INTERNAL_CODE, i);
   1457 	for (i = ESA_REV_B_DATA_MEMORY_BEGIN; i <= ESA_REV_B_DATA_MEMORY_END;
   1458 	    i++)
   1459 		sc->savemem[index++] = esa_read_assp(sc,
   1460 		    ESA_MEMTYPE_INTERNAL_DATA, i);
   1461 
   1462 	esa_power(sc, PCI_PMCSR_STATE_D3);
   1463 
   1464 	return (0);
   1465 }
   1466 
   1467 int
   1468 esa_resume(struct esa_softc *sc) {
   1469 	bus_space_tag_t iot = sc->sc_iot;
   1470 	bus_space_handle_t ioh = sc->sc_ioh;
   1471 	int i, index;
   1472 	u_int8_t reset_state;
   1473 
   1474 	index = 0;
   1475 
   1476 	esa_power(sc, PCI_PMCSR_STATE_D0);
   1477 	delay(10000);
   1478 
   1479 	esa_config(sc);
   1480 
   1481 	reset_state = esa_assp_halt(sc);
   1482 
   1483 	/* restore ASSP */
   1484 	for (i = ESA_REV_B_CODE_MEMORY_BEGIN; i <= ESA_REV_B_CODE_MEMORY_END;
   1485 	    i++)
   1486 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_CODE, i,
   1487 		    sc->savemem[index++]);
   1488 	for (i = ESA_REV_B_DATA_MEMORY_BEGIN; i <= ESA_REV_B_DATA_MEMORY_END;
   1489 	    i++)
   1490 		esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, i,
   1491 		    sc->savemem[index++]);
   1492 
   1493 	esa_write_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, ESA_KDATA_DMA_ACTIVE, 0);
   1494 	bus_space_write_1(iot, ioh, ESA_DSP_PORT_CONTROL_REG_B,
   1495 	    reset_state | ESA_REGB_ENABLE_RESET);
   1496 
   1497 	esa_enable_interrupts(sc);
   1498 	esa_amp_enable(sc);
   1499 
   1500 	return (0);
   1501 }
   1502 
   1503 u_int32_t
   1504 esa_get_pointer(struct esa_softc *sc, struct esa_channel *ch)
   1505 {
   1506 	u_int16_t hi = 0, lo = 0;
   1507 	u_int32_t addr;
   1508 	int data_offset = ch->data_offset;
   1509 
   1510 	hi = esa_read_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, data_offset +
   1511 	    ESA_CDATA_HOST_SRC_CURRENTH);
   1512 	lo = esa_read_assp(sc, ESA_MEMTYPE_INTERNAL_DATA, data_offset +
   1513 	    ESA_CDATA_HOST_SRC_CURRENTL);
   1514 
   1515 	addr = lo | ((u_int32_t)hi << 16);
   1516 	return (addr - ch->start);
   1517 }
   1518 
   1519 paddr_t
   1520 esa_mappage(void *addr, void *mem, off_t off, int prot)
   1521 {
   1522 	struct esa_softc *sc = addr;
   1523 	struct esa_dma *p;
   1524 
   1525 	if (off < 0)
   1526 		return (-1);
   1527 	for (p = sc->sc_dmas; p && KERNADDR(p) != mem; p = p->next)
   1528 		;
   1529 	if (!p)
   1530 		return (-1);
   1531 	return (bus_dmamem_mmap(sc->sc_dmat, p->segs, p->nsegs,
   1532 				off, prot, BUS_DMA_WAITOK));
   1533 }
   1534