xref: /netbsd-src/sys/dev/pci/eso.c (revision b757af438b42b93f8c6571f026d8b8ef3eaf5fc9)
1 /*	$NetBSD: eso.c,v 1.59 2011/11/24 03:35:59 mrg Exp $	*/
2 
3 /*-
4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software developed for The NetBSD Foundation
8  * by Andrew Doran.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 /*
33  * Copyright (c) 1999, 2000, 2004 Klaus J. Klein
34  * All rights reserved.
35  *
36  * Redistribution and use in source and binary forms, with or without
37  * modification, are permitted provided that the following conditions
38  * are met:
39  * 1. Redistributions of source code must retain the above copyright
40  *    notice, this list of conditions and the following disclaimer.
41  * 2. Redistributions in binary form must reproduce the above copyright
42  *    notice, this list of conditions and the following disclaimer in the
43  *    documentation and/or other materials provided with the distribution.
44  * 3. The name of the author may not be used to endorse or promote products
45  *    derived from this software without specific prior written permission.
46  *
47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
48  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
50  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
51  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
52  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
53  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
54  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
55  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57  * SUCH DAMAGE.
58  */
59 
60 /*
61  * ESS Technology Inc. Solo-1 PCI AudioDrive (ES1938/1946) device driver.
62  */
63 
64 #include <sys/cdefs.h>
65 __KERNEL_RCSID(0, "$NetBSD: eso.c,v 1.59 2011/11/24 03:35:59 mrg Exp $");
66 
67 #include "mpu.h"
68 
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/kernel.h>
72 #include <sys/kmem.h>
73 #include <sys/device.h>
74 #include <sys/queue.h>
75 #include <sys/proc.h>
76 
77 #include <dev/pci/pcidevs.h>
78 #include <dev/pci/pcivar.h>
79 
80 #include <sys/audioio.h>
81 #include <dev/audio_if.h>
82 
83 #include <dev/mulaw.h>
84 #include <dev/auconv.h>
85 
86 #include <dev/ic/mpuvar.h>
87 #include <dev/ic/i8237reg.h>
88 #include <dev/pci/esoreg.h>
89 #include <dev/pci/esovar.h>
90 
91 #include <sys/bus.h>
92 #include <sys/intr.h>
93 
94 /*
95  * XXX Work around the 24-bit implementation limit of the Audio 1 DMA
96  * XXX engine by allocating through the ISA DMA tag.
97  */
98 #if defined(amd64) || defined(i386)
99 #include "isa.h"
100 #if NISA > 0
101 #include <dev/isa/isavar.h>
102 #endif
103 #endif
104 
105 #if defined(AUDIO_DEBUG) || defined(DEBUG)
106 #define DPRINTF(x) printf x
107 #else
108 #define DPRINTF(x)
109 #endif
110 
111 struct eso_dma {
112 	bus_dma_tag_t		ed_dmat;
113 	bus_dmamap_t		ed_map;
114 	void *			ed_kva;
115 	bus_dma_segment_t	ed_segs[1];
116 	int			ed_nsegs;
117 	size_t			ed_size;
118 	SLIST_ENTRY(eso_dma)	ed_slist;
119 };
120 
121 #define KVADDR(dma)	((void *)(dma)->ed_kva)
122 #define DMAADDR(dma)	((dma)->ed_map->dm_segs[0].ds_addr)
123 
124 /* Autoconfiguration interface */
125 static int eso_match(device_t, cfdata_t, void *);
126 static void eso_attach(device_t, device_t, void *);
127 static void eso_defer(device_t);
128 static int eso_print(void *, const char *);
129 
130 CFATTACH_DECL(eso, sizeof (struct eso_softc),
131     eso_match, eso_attach, NULL, NULL);
132 
133 /* PCI interface */
134 static int eso_intr(void *);
135 
136 /* MI audio layer interface */
137 static int	eso_query_encoding(void *, struct audio_encoding *);
138 static int	eso_set_params(void *, int, int, audio_params_t *,
139 		    audio_params_t *, stream_filter_list_t *,
140 		    stream_filter_list_t *);
141 static int	eso_round_blocksize(void *, int, int, const audio_params_t *);
142 static int	eso_halt_output(void *);
143 static int	eso_halt_input(void *);
144 static int	eso_getdev(void *, struct audio_device *);
145 static int	eso_set_port(void *, mixer_ctrl_t *);
146 static int	eso_get_port(void *, mixer_ctrl_t *);
147 static int	eso_query_devinfo(void *, mixer_devinfo_t *);
148 static void *	eso_allocm(void *, int, size_t);
149 static void	eso_freem(void *, void *, size_t);
150 static size_t	eso_round_buffersize(void *, int, size_t);
151 static paddr_t	eso_mappage(void *, void *, off_t, int);
152 static int	eso_get_props(void *);
153 static int	eso_trigger_output(void *, void *, void *, int,
154 		    void (*)(void *), void *, const audio_params_t *);
155 static int	eso_trigger_input(void *, void *, void *, int,
156 		    void (*)(void *), void *, const audio_params_t *);
157 static void	eso_get_locks(void *, kmutex_t **, kmutex_t **);
158 
159 static const struct audio_hw_if eso_hw_if = {
160 	NULL,			/* open */
161 	NULL,			/* close */
162 	NULL,			/* drain */
163 	eso_query_encoding,
164 	eso_set_params,
165 	eso_round_blocksize,
166 	NULL,			/* commit_settings */
167 	NULL,			/* init_output */
168 	NULL,			/* init_input */
169 	NULL,			/* start_output */
170 	NULL,			/* start_input */
171 	eso_halt_output,
172 	eso_halt_input,
173 	NULL,			/* speaker_ctl */
174 	eso_getdev,
175 	NULL,			/* setfd */
176 	eso_set_port,
177 	eso_get_port,
178 	eso_query_devinfo,
179 	eso_allocm,
180 	eso_freem,
181 	eso_round_buffersize,
182 	eso_mappage,
183 	eso_get_props,
184 	eso_trigger_output,
185 	eso_trigger_input,
186 	NULL,			/* dev_ioctl */
187 	eso_get_locks,
188 };
189 
190 static const char * const eso_rev2model[] = {
191 	"ES1938",
192 	"ES1946",
193 	"ES1946 Revision E"
194 };
195 
196 #define ESO_NFORMATS	8
197 static const struct audio_format eso_formats[ESO_NFORMATS] = {
198 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
199 	 2, AUFMT_STEREO, 0, {ESO_MINRATE, ESO_MAXRATE}},
200 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
201 	 1, AUFMT_MONAURAL, 0, {ESO_MINRATE, ESO_MAXRATE}},
202 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 16, 16,
203 	 2, AUFMT_STEREO, 0, {ESO_MINRATE, ESO_MAXRATE}},
204 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 16, 16,
205 	 1, AUFMT_MONAURAL, 0, {ESO_MINRATE, ESO_MAXRATE}},
206 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
207 	 2, AUFMT_STEREO, 0, {ESO_MINRATE, ESO_MAXRATE}},
208 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 8, 8,
209 	 1, AUFMT_MONAURAL, 0, {ESO_MINRATE, ESO_MAXRATE}},
210 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 8, 8,
211 	 2, AUFMT_STEREO, 0, {ESO_MINRATE, ESO_MAXRATE}},
212 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_ULINEAR_LE, 8, 8,
213 	 1, AUFMT_MONAURAL, 0, {ESO_MINRATE, ESO_MAXRATE}}
214 };
215 
216 
217 /*
218  * Utility routines
219  */
220 /* Register access etc. */
221 static uint8_t	eso_read_ctlreg(struct eso_softc *, uint8_t);
222 static uint8_t	eso_read_mixreg(struct eso_softc *, uint8_t);
223 static uint8_t	eso_read_rdr(struct eso_softc *);
224 static void	eso_reload_master_vol(struct eso_softc *);
225 static int	eso_reset(struct eso_softc *);
226 static void	eso_set_gain(struct eso_softc *, unsigned int);
227 static int	eso_set_recsrc(struct eso_softc *, unsigned int);
228 static int	eso_set_monooutsrc(struct eso_softc *, unsigned int);
229 static int	eso_set_monoinbypass(struct eso_softc *, unsigned int);
230 static int	eso_set_preamp(struct eso_softc *, unsigned int);
231 static void	eso_write_cmd(struct eso_softc *, uint8_t);
232 static void	eso_write_ctlreg(struct eso_softc *, uint8_t, uint8_t);
233 static void	eso_write_mixreg(struct eso_softc *, uint8_t, uint8_t);
234 /* DMA memory allocation */
235 static int	eso_allocmem(struct eso_softc *, size_t, size_t, size_t,
236 		    int, struct eso_dma *);
237 static void	eso_freemem(struct eso_dma *);
238 static struct eso_dma *	eso_kva2dma(const struct eso_softc *, const void *);
239 
240 
241 static int
242 eso_match(device_t parent, cfdata_t match, void *aux)
243 {
244 	struct pci_attach_args *pa;
245 
246 	pa = aux;
247 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ESSTECH &&
248 	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ESSTECH_SOLO1)
249 		return 1;
250 
251 	return 0;
252 }
253 
254 static void
255 eso_attach(device_t parent, device_t self, void *aux)
256 {
257 	struct eso_softc *sc;
258 	struct pci_attach_args *pa;
259 	struct audio_attach_args aa;
260 	pci_intr_handle_t ih;
261 	bus_addr_t vcbase;
262 	const char *intrstring;
263 	int idx;
264 	uint8_t a2mode, mvctl;
265 
266 	sc = device_private(self);
267 	pa = aux;
268 	aprint_naive(": Audio controller\n");
269 
270 	sc->sc_revision = PCI_REVISION(pa->pa_class);
271 	aprint_normal(": ESS Solo-1 PCI AudioDrive ");
272 	if (sc->sc_revision <
273 	    sizeof (eso_rev2model) / sizeof (eso_rev2model[0]))
274 		aprint_normal("%s\n", eso_rev2model[sc->sc_revision]);
275 	else
276 		aprint_normal("(unknown rev. 0x%02x)\n", sc->sc_revision);
277 
278 	/* Map I/O registers. */
279 	if (pci_mapreg_map(pa, ESO_PCI_BAR_IO, PCI_MAPREG_TYPE_IO, 0,
280 	    &sc->sc_iot, &sc->sc_ioh, NULL, NULL)) {
281 		aprint_error_dev(&sc->sc_dev, "can't map I/O space\n");
282 		return;
283 	}
284 	if (pci_mapreg_map(pa, ESO_PCI_BAR_SB, PCI_MAPREG_TYPE_IO, 0,
285 	    &sc->sc_sb_iot, &sc->sc_sb_ioh, NULL, NULL)) {
286 		aprint_error_dev(&sc->sc_dev, "can't map SB I/O space\n");
287 		return;
288 	}
289 	if (pci_mapreg_map(pa, ESO_PCI_BAR_VC, PCI_MAPREG_TYPE_IO, 0,
290 	    &sc->sc_dmac_iot, &sc->sc_dmac_ioh, &vcbase, &sc->sc_vcsize)) {
291 		aprint_error_dev(&sc->sc_dev, "can't map VC I/O space\n");
292 		/* Don't bail out yet: we can map it later, see below. */
293 		vcbase = 0;
294 		sc->sc_vcsize = 0x10; /* From the data sheet. */
295 	}
296 	if (pci_mapreg_map(pa, ESO_PCI_BAR_MPU, PCI_MAPREG_TYPE_IO, 0,
297 	    &sc->sc_mpu_iot, &sc->sc_mpu_ioh, NULL, NULL)) {
298 		aprint_error_dev(&sc->sc_dev, "can't map MPU I/O space\n");
299 		return;
300 	}
301 	if (pci_mapreg_map(pa, ESO_PCI_BAR_GAME, PCI_MAPREG_TYPE_IO, 0,
302 	    &sc->sc_game_iot, &sc->sc_game_ioh, NULL, NULL)) {
303 		aprint_error_dev(&sc->sc_dev, "can't map Game I/O space\n");
304 		return;
305 	}
306 
307 	sc->sc_dmat = pa->pa_dmat;
308 	SLIST_INIT(&sc->sc_dmas);
309 	sc->sc_dmac_configured = 0;
310 
311 	/* Enable bus mastering. */
312 	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
313 	    pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
314 	    PCI_COMMAND_MASTER_ENABLE);
315 
316 	/* Reset the device; bail out upon failure. */
317 	if (eso_reset(sc) != 0) {
318 		aprint_error_dev(&sc->sc_dev, "can't reset\n");
319 		return;
320 	}
321 
322 	/* Select the DMA/IRQ policy: DDMA, ISA IRQ emulation disabled. */
323 	pci_conf_write(pa->pa_pc, pa->pa_tag, ESO_PCI_S1C,
324 	    pci_conf_read(pa->pa_pc, pa->pa_tag, ESO_PCI_S1C) &
325 	    ~(ESO_PCI_S1C_IRQP_MASK | ESO_PCI_S1C_DMAP_MASK));
326 
327 	/* Enable the relevant (DMA) interrupts. */
328 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, ESO_IO_IRQCTL,
329 	    ESO_IO_IRQCTL_A1IRQ | ESO_IO_IRQCTL_A2IRQ | ESO_IO_IRQCTL_HVIRQ |
330 	    ESO_IO_IRQCTL_MPUIRQ);
331 
332 	/* Set up A1's sample rate generator for new-style parameters. */
333 	a2mode = eso_read_mixreg(sc, ESO_MIXREG_A2MODE);
334 	a2mode |= ESO_MIXREG_A2MODE_NEWA1 | ESO_MIXREG_A2MODE_ASYNC;
335 	eso_write_mixreg(sc, ESO_MIXREG_A2MODE, a2mode);
336 
337 	/* Slave Master Volume to Hardware Volume Control Counter, unmask IRQ.*/
338 	mvctl = eso_read_mixreg(sc, ESO_MIXREG_MVCTL);
339 	mvctl &= ~ESO_MIXREG_MVCTL_SPLIT;
340 	mvctl |= ESO_MIXREG_MVCTL_HVIRQM;
341 	eso_write_mixreg(sc, ESO_MIXREG_MVCTL, mvctl);
342 
343 	/* Set mixer regs to something reasonable, needs work. */
344 	sc->sc_recmon = sc->sc_spatializer = sc->sc_mvmute = 0;
345 	eso_set_monooutsrc(sc, ESO_MIXREG_MPM_MOMUTE);
346 	eso_set_monoinbypass(sc, 0);
347 	eso_set_preamp(sc, 1);
348 	for (idx = 0; idx < ESO_NGAINDEVS; idx++) {
349 		int v;
350 
351 		switch (idx) {
352 		case ESO_MIC_PLAY_VOL:
353 		case ESO_LINE_PLAY_VOL:
354 		case ESO_CD_PLAY_VOL:
355 		case ESO_MONO_PLAY_VOL:
356 		case ESO_AUXB_PLAY_VOL:
357 		case ESO_DAC_REC_VOL:
358 		case ESO_LINE_REC_VOL:
359 		case ESO_SYNTH_REC_VOL:
360 		case ESO_CD_REC_VOL:
361 		case ESO_MONO_REC_VOL:
362 		case ESO_AUXB_REC_VOL:
363 		case ESO_SPATIALIZER:
364 			v = 0;
365 			break;
366 		case ESO_MASTER_VOL:
367 			v = ESO_GAIN_TO_6BIT(AUDIO_MAX_GAIN / 2);
368 			break;
369 		default:
370 			v = ESO_GAIN_TO_4BIT(AUDIO_MAX_GAIN / 2);
371 			break;
372 		}
373 		sc->sc_gain[idx][ESO_LEFT] = sc->sc_gain[idx][ESO_RIGHT] = v;
374 		eso_set_gain(sc, idx);
375 	}
376 	eso_set_recsrc(sc, ESO_MIXREG_ERS_MIC);
377 
378 	/* Map and establish the interrupt. */
379 	if (pci_intr_map(pa, &ih)) {
380 		aprint_error_dev(&sc->sc_dev, "couldn't map interrupt\n");
381 		return;
382 	}
383 
384 	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
385 	mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_AUDIO);
386 
387 	intrstring = pci_intr_string(pa->pa_pc, ih);
388 	sc->sc_ih  = pci_intr_establish(pa->pa_pc, ih, IPL_AUDIO, eso_intr, sc);
389 	if (sc->sc_ih == NULL) {
390 		aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt");
391 		if (intrstring != NULL)
392 			aprint_error(" at %s", intrstring);
393 		aprint_error("\n");
394 		mutex_destroy(&sc->sc_lock);
395 		mutex_destroy(&sc->sc_intr_lock);
396 		return;
397 	}
398 	aprint_normal_dev(&sc->sc_dev, "interrupting at %s\n",
399 	    intrstring);
400 
401 	cv_init(&sc->sc_pcv, "esoho");
402 	cv_init(&sc->sc_rcv, "esohi");
403 
404 	/*
405 	 * Set up the DDMA Control register; a suitable I/O region has been
406 	 * supposedly mapped in the VC base address register.
407 	 *
408 	 * The Solo-1 has an ... interesting silicon bug that causes it to
409 	 * not respond to I/O space accesses to the Audio 1 DMA controller
410 	 * if the latter's mapping base address is aligned on a 1K boundary.
411 	 * As a consequence, it is quite possible for the mapping provided
412 	 * in the VC BAR to be useless.  To work around this, we defer this
413 	 * part until all autoconfiguration on our parent bus is completed
414 	 * and then try to map it ourselves in fulfillment of the constraint.
415 	 *
416 	 * According to the register map we may write to the low 16 bits
417 	 * only, but experimenting has shown we're safe.
418 	 * -kjk
419 	 */
420 	if (ESO_VALID_DDMAC_BASE(vcbase)) {
421 		pci_conf_write(pa->pa_pc, pa->pa_tag, ESO_PCI_DDMAC,
422 		    vcbase | ESO_PCI_DDMAC_DE);
423 		sc->sc_dmac_configured = 1;
424 
425 		aprint_normal_dev(&sc->sc_dev,
426 		    "mapping Audio 1 DMA using VC I/O space at 0x%lx\n",
427 		    (unsigned long)vcbase);
428 	} else {
429 		DPRINTF(("%s: VC I/O space at 0x%lx not suitable, deferring\n",
430 		    device_xname(&sc->sc_dev), (unsigned long)vcbase));
431 		sc->sc_pa = *pa;
432 		config_defer(self, eso_defer);
433 	}
434 
435 	audio_attach_mi(&eso_hw_if, sc, &sc->sc_dev);
436 
437 	aa.type = AUDIODEV_TYPE_OPL;
438 	aa.hwif = NULL;
439 	aa.hdl = NULL;
440 	(void)config_found(&sc->sc_dev, &aa, audioprint);
441 
442 	aa.type = AUDIODEV_TYPE_MPU;
443 	aa.hwif = NULL;
444 	aa.hdl = NULL;
445 	sc->sc_mpudev = config_found(&sc->sc_dev, &aa, audioprint);
446 	if (sc->sc_mpudev != NULL) {
447 		/* Unmask the MPU irq. */
448 		mutex_spin_enter(&sc->sc_intr_lock);
449 		mvctl = eso_read_mixreg(sc, ESO_MIXREG_MVCTL);
450 		mvctl |= ESO_MIXREG_MVCTL_MPUIRQM;
451 		eso_write_mixreg(sc, ESO_MIXREG_MVCTL, mvctl);
452 		mutex_spin_exit(&sc->sc_intr_lock);
453 	}
454 
455 	aa.type = AUDIODEV_TYPE_AUX;
456 	aa.hwif = NULL;
457 	aa.hdl = NULL;
458 	(void)config_found(&sc->sc_dev, &aa, eso_print);
459 }
460 
461 static void
462 eso_defer(device_t self)
463 {
464 	struct eso_softc *sc;
465 	struct pci_attach_args *pa;
466 	bus_addr_t addr, start;
467 
468 	sc = device_private(self);
469 	pa = &sc->sc_pa;
470 	aprint_normal_dev(&sc->sc_dev, "");
471 
472 	/*
473 	 * This is outright ugly, but since we must not make assumptions
474 	 * on the underlying allocator's behaviour it's the most straight-
475 	 * forward way to implement it.  Note that we skip over the first
476 	 * 1K region, which is typically occupied by an attached ISA bus.
477 	 */
478 	mutex_enter(&sc->sc_lock);
479 	for (start = 0x0400; start < 0xffff; start += 0x0400) {
480 		if (bus_space_alloc(sc->sc_iot,
481 		    start + sc->sc_vcsize, start + 0x0400 - 1,
482 		    sc->sc_vcsize, sc->sc_vcsize, 0, 0, &addr,
483 		    &sc->sc_dmac_ioh) != 0)
484 			continue;
485 
486 		mutex_spin_enter(&sc->sc_intr_lock);
487 		pci_conf_write(pa->pa_pc, pa->pa_tag, ESO_PCI_DDMAC,
488 		    addr | ESO_PCI_DDMAC_DE);
489 		mutex_spin_exit(&sc->sc_intr_lock);
490 		sc->sc_dmac_iot = sc->sc_iot;
491 		sc->sc_dmac_configured = 1;
492 		aprint_normal("mapping Audio 1 DMA using I/O space at 0x%lx\n",
493 		    (unsigned long)addr);
494 
495 		mutex_exit(&sc->sc_lock);
496 		return;
497 	}
498 	mutex_exit(&sc->sc_lock);
499 
500 	aprint_error("can't map Audio 1 DMA into I/O space\n");
501 }
502 
503 /* ARGSUSED */
504 static int
505 eso_print(void *aux, const char *pnp)
506 {
507 
508 	/* Only joys can attach via this; easy. */
509 	if (pnp)
510 		aprint_normal("joy at %s:", pnp);
511 
512 	return UNCONF;
513 }
514 
515 static void
516 eso_write_cmd(struct eso_softc *sc, uint8_t cmd)
517 {
518 	int i;
519 
520 	/* Poll for busy indicator to become clear. */
521 	for (i = 0; i < ESO_WDR_TIMEOUT; i++) {
522 		if ((bus_space_read_1(sc->sc_sb_iot, sc->sc_sb_ioh, ESO_SB_RSR)
523 		    & ESO_SB_RSR_BUSY) == 0) {
524 			bus_space_write_1(sc->sc_sb_iot, sc->sc_sb_ioh,
525 			    ESO_SB_WDR, cmd);
526 			return;
527 		} else {
528 			delay(10);
529 		}
530 	}
531 
532 	printf("%s: WDR timeout\n", device_xname(&sc->sc_dev));
533 	return;
534 }
535 
536 /* Write to a controller register */
537 static void
538 eso_write_ctlreg(struct eso_softc *sc, uint8_t reg, uint8_t val)
539 {
540 
541 	/* DPRINTF(("ctlreg 0x%02x = 0x%02x\n", reg, val)); */
542 
543 	eso_write_cmd(sc, reg);
544 	eso_write_cmd(sc, val);
545 }
546 
547 /* Read out the Read Data Register */
548 static uint8_t
549 eso_read_rdr(struct eso_softc *sc)
550 {
551 	int i;
552 
553 	for (i = 0; i < ESO_RDR_TIMEOUT; i++) {
554 		if (bus_space_read_1(sc->sc_sb_iot, sc->sc_sb_ioh,
555 		    ESO_SB_RBSR) & ESO_SB_RBSR_RDAV) {
556 			return (bus_space_read_1(sc->sc_sb_iot,
557 			    sc->sc_sb_ioh, ESO_SB_RDR));
558 		} else {
559 			delay(10);
560 		}
561 	}
562 
563 	printf("%s: RDR timeout\n", device_xname(&sc->sc_dev));
564 	return (-1);
565 }
566 
567 static uint8_t
568 eso_read_ctlreg(struct eso_softc *sc, uint8_t reg)
569 {
570 
571 	eso_write_cmd(sc, ESO_CMD_RCR);
572 	eso_write_cmd(sc, reg);
573 	return eso_read_rdr(sc);
574 }
575 
576 static void
577 eso_write_mixreg(struct eso_softc *sc, uint8_t reg, uint8_t val)
578 {
579 
580 	KASSERT(mutex_owned(&sc->sc_intr_lock));
581 
582 	/* DPRINTF(("mixreg 0x%02x = 0x%02x\n", reg, val)); */
583 
584 	bus_space_write_1(sc->sc_sb_iot, sc->sc_sb_ioh, ESO_SB_MIXERADDR, reg);
585 	bus_space_write_1(sc->sc_sb_iot, sc->sc_sb_ioh, ESO_SB_MIXERDATA, val);
586 }
587 
588 static uint8_t
589 eso_read_mixreg(struct eso_softc *sc, uint8_t reg)
590 {
591 	uint8_t val;
592 
593 	KASSERT(mutex_owned(&sc->sc_intr_lock));
594 
595 	bus_space_write_1(sc->sc_sb_iot, sc->sc_sb_ioh, ESO_SB_MIXERADDR, reg);
596 	val = bus_space_read_1(sc->sc_sb_iot, sc->sc_sb_ioh, ESO_SB_MIXERDATA);
597 
598 	return val;
599 }
600 
601 static int
602 eso_intr(void *hdl)
603 {
604 	struct eso_softc *sc = hdl;
605 #if NMPU > 0
606 	struct mpu_softc *sc_mpu = device_private(sc->sc_mpudev);
607 #endif
608 	uint8_t irqctl;
609 
610 	mutex_spin_enter(&sc->sc_intr_lock);
611 
612 	irqctl = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ESO_IO_IRQCTL);
613 
614 	/* If it wasn't ours, that's all she wrote. */
615 	if ((irqctl & (ESO_IO_IRQCTL_A1IRQ | ESO_IO_IRQCTL_A2IRQ |
616 	    ESO_IO_IRQCTL_HVIRQ | ESO_IO_IRQCTL_MPUIRQ)) == 0) {
617 		mutex_spin_exit(&sc->sc_intr_lock);
618 		return 0;
619 	}
620 
621 	if (irqctl & ESO_IO_IRQCTL_A1IRQ) {
622 		/* Clear interrupt. */
623 		(void)bus_space_read_1(sc->sc_sb_iot, sc->sc_sb_ioh,
624 		    ESO_SB_RBSR);
625 
626 		if (sc->sc_rintr)
627 			sc->sc_rintr(sc->sc_rarg);
628 		else
629 			cv_broadcast(&sc->sc_rcv);
630 	}
631 
632 	if (irqctl & ESO_IO_IRQCTL_A2IRQ) {
633 		/*
634 		 * Clear the A2 IRQ latch: the cached value reflects the
635 		 * current DAC settings with the IRQ latch bit not set.
636 		 */
637 		eso_write_mixreg(sc, ESO_MIXREG_A2C2, sc->sc_a2c2);
638 
639 		if (sc->sc_pintr)
640 			sc->sc_pintr(sc->sc_parg);
641 		else
642 			cv_broadcast(&sc->sc_pcv);
643 	}
644 
645 	if (irqctl & ESO_IO_IRQCTL_HVIRQ) {
646 		/* Clear interrupt. */
647 		eso_write_mixreg(sc, ESO_MIXREG_CHVIR, ESO_MIXREG_CHVIR_CHVIR);
648 
649 		/*
650 		 * Raise a flag to cause a lazy update of the in-softc gain
651 		 * values the next time the software mixer is read to keep
652 		 * interrupt service cost low.  ~0 cannot occur otherwise
653 		 * as the master volume has a precision of 6 bits only.
654 		 */
655 		sc->sc_gain[ESO_MASTER_VOL][ESO_LEFT] = (uint8_t)~0;
656 	}
657 
658 #if NMPU > 0
659 	if ((irqctl & ESO_IO_IRQCTL_MPUIRQ) && sc_mpu != NULL)
660 		mpu_intr(sc_mpu);
661 #endif
662 
663 	mutex_spin_exit(&sc->sc_intr_lock);
664 	return 1;
665 }
666 
667 /* Perform a software reset, including DMA FIFOs. */
668 static int
669 eso_reset(struct eso_softc *sc)
670 {
671 	int i;
672 
673 	KASSERT(mutex_owned(&sc->sc_intr_lock));
674 
675 	bus_space_write_1(sc->sc_sb_iot, sc->sc_sb_ioh, ESO_SB_RESET,
676 	    ESO_SB_RESET_SW | ESO_SB_RESET_FIFO);
677 	/* `Delay' suggested in the data sheet. */
678 	(void)bus_space_read_1(sc->sc_sb_iot, sc->sc_sb_ioh, ESO_SB_STATUS);
679 	bus_space_write_1(sc->sc_sb_iot, sc->sc_sb_ioh, ESO_SB_RESET, 0);
680 
681 	/* Wait for reset to take effect. */
682 	for (i = 0; i < ESO_RESET_TIMEOUT; i++) {
683 		/* Poll for data to become available. */
684 		if ((bus_space_read_1(sc->sc_sb_iot, sc->sc_sb_ioh,
685 		    ESO_SB_RBSR) & ESO_SB_RBSR_RDAV) != 0 &&
686 		    bus_space_read_1(sc->sc_sb_iot, sc->sc_sb_ioh,
687 			ESO_SB_RDR) == ESO_SB_RDR_RESETMAGIC) {
688 
689 			/* Activate Solo-1 extension commands. */
690 			eso_write_cmd(sc, ESO_CMD_EXTENB);
691 			/* Reset mixer registers. */
692 			eso_write_mixreg(sc, ESO_MIXREG_RESET,
693 			    ESO_MIXREG_RESET_RESET);
694 
695 			return 0;
696 		} else {
697 			delay(1000);
698 		}
699 	}
700 
701 	printf("%s: reset timeout\n", device_xname(&sc->sc_dev));
702 	return -1;
703 }
704 
705 static int
706 eso_query_encoding(void *hdl, struct audio_encoding *fp)
707 {
708 
709 	switch (fp->index) {
710 	case 0:
711 		strcpy(fp->name, AudioEulinear);
712 		fp->encoding = AUDIO_ENCODING_ULINEAR;
713 		fp->precision = 8;
714 		fp->flags = 0;
715 		break;
716 	case 1:
717 		strcpy(fp->name, AudioEmulaw);
718 		fp->encoding = AUDIO_ENCODING_ULAW;
719 		fp->precision = 8;
720 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
721 		break;
722 	case 2:
723 		strcpy(fp->name, AudioEalaw);
724 		fp->encoding = AUDIO_ENCODING_ALAW;
725 		fp->precision = 8;
726 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
727 		break;
728 	case 3:
729 		strcpy(fp->name, AudioEslinear);
730 		fp->encoding = AUDIO_ENCODING_SLINEAR;
731 		fp->precision = 8;
732 		fp->flags = 0;
733 		break;
734 	case 4:
735 		strcpy(fp->name, AudioEslinear_le);
736 		fp->encoding = AUDIO_ENCODING_SLINEAR_LE;
737 		fp->precision = 16;
738 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
739 		break;
740 	case 5:
741 		strcpy(fp->name, AudioEulinear_le);
742 		fp->encoding = AUDIO_ENCODING_ULINEAR_LE;
743 		fp->precision = 16;
744 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
745 		break;
746 	case 6:
747 		strcpy(fp->name, AudioEslinear_be);
748 		fp->encoding = AUDIO_ENCODING_SLINEAR_BE;
749 		fp->precision = 16;
750 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
751 		break;
752 	case 7:
753 		strcpy(fp->name, AudioEulinear_be);
754 		fp->encoding = AUDIO_ENCODING_ULINEAR_BE;
755 		fp->precision = 16;
756 		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
757 		break;
758 	default:
759 		return EINVAL;
760 	}
761 
762 	return 0;
763 }
764 
765 static int
766 eso_set_params(void *hdl, int setmode, int usemode,
767     audio_params_t *play, audio_params_t *rec, stream_filter_list_t *pfil,
768     stream_filter_list_t *rfil)
769 {
770 	struct eso_softc *sc;
771 	struct audio_params *p;
772 	stream_filter_list_t *fil;
773 	int mode, r[2], rd[2], ar[2], clk;
774 	unsigned int srg, fltdiv;
775 	int i;
776 
777 	sc = hdl;
778 	for (mode = AUMODE_RECORD; mode != -1;
779 	     mode = mode == AUMODE_RECORD ? AUMODE_PLAY : -1) {
780 		if ((setmode & mode) == 0)
781 			continue;
782 
783 		p = (mode == AUMODE_PLAY) ? play : rec;
784 
785 		if (p->sample_rate < ESO_MINRATE ||
786 		    p->sample_rate > ESO_MAXRATE ||
787 		    (p->precision != 8 && p->precision != 16) ||
788 		    (p->channels != 1 && p->channels != 2))
789 			return EINVAL;
790 
791 		/*
792 		 * We'll compute both possible sample rate dividers and pick
793 		 * the one with the least error.
794 		 */
795 #define ABS(x) ((x) < 0 ? -(x) : (x))
796 		r[0] = ESO_CLK0 /
797 		    (128 - (rd[0] = 128 - ESO_CLK0 / p->sample_rate));
798 		r[1] = ESO_CLK1 /
799 		    (128 - (rd[1] = 128 - ESO_CLK1 / p->sample_rate));
800 
801 		ar[0] = p->sample_rate - r[0];
802 		ar[1] = p->sample_rate - r[1];
803 		clk = ABS(ar[0]) > ABS(ar[1]) ? 1 : 0;
804 		srg = rd[clk] | (clk == 1 ? ESO_CLK1_SELECT : 0x00);
805 
806 		/* Roll-off frequency of 87%, as in the ES1888 driver. */
807 		fltdiv = 256 - 200279L / r[clk];
808 
809 		/* Update to reflect the possibly inexact rate. */
810 		p->sample_rate = r[clk];
811 
812 		fil = (mode == AUMODE_PLAY) ? pfil : rfil;
813 		i = auconv_set_converter(eso_formats, ESO_NFORMATS,
814 					 mode, p, FALSE, fil);
815 		if (i < 0)
816 			return EINVAL;
817 
818 		mutex_spin_enter(&sc->sc_intr_lock);
819 		if (mode == AUMODE_RECORD) {
820 			/* Audio 1 */
821 			DPRINTF(("A1 srg 0x%02x fdiv 0x%02x\n", srg, fltdiv));
822 			eso_write_ctlreg(sc, ESO_CTLREG_SRG, srg);
823 			eso_write_ctlreg(sc, ESO_CTLREG_FLTDIV, fltdiv);
824 		} else {
825 			/* Audio 2 */
826 			DPRINTF(("A2 srg 0x%02x fdiv 0x%02x\n", srg, fltdiv));
827 			eso_write_mixreg(sc, ESO_MIXREG_A2SRG, srg);
828 			eso_write_mixreg(sc, ESO_MIXREG_A2FLTDIV, fltdiv);
829 		}
830 		mutex_spin_exit(&sc->sc_intr_lock);
831 #undef ABS
832 
833 	}
834 
835 	return 0;
836 }
837 
838 static int
839 eso_round_blocksize(void *hdl, int blk, int mode,
840     const audio_params_t *param)
841 {
842 
843 	return blk & -32;	/* keep good alignment; at least 16 req'd */
844 }
845 
846 static int
847 eso_halt_output(void *hdl)
848 {
849 	struct eso_softc *sc;
850 	int error;
851 
852 	sc = hdl;
853 	DPRINTF(("%s: halt_output\n", device_xname(&sc->sc_dev)));
854 
855 	/*
856 	 * Disable auto-initialize DMA, allowing the FIFO to drain and then
857 	 * stop.  The interrupt callback pointer is cleared at this
858 	 * point so that an outstanding FIFO interrupt for the remaining data
859 	 * will be acknowledged without further processing.
860 	 *
861 	 * This does not immediately `abort' an operation in progress (c.f.
862 	 * audio(9)) but is the method to leave the FIFO behind in a clean
863 	 * state with the least hair.  (Besides, that item needs to be
864 	 * rephrased for trigger_*()-based DMA environments.)
865 	 */
866 	eso_write_mixreg(sc, ESO_MIXREG_A2C1,
867 	    ESO_MIXREG_A2C1_FIFOENB | ESO_MIXREG_A2C1_DMAENB);
868 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, ESO_IO_A2DMAM,
869 	    ESO_IO_A2DMAM_DMAENB);
870 
871 	sc->sc_pintr = NULL;
872 	mutex_exit(&sc->sc_lock);
873 	error = cv_timedwait_sig(&sc->sc_pcv, &sc->sc_intr_lock, sc->sc_pdrain);
874 	if (!mutex_tryenter(&sc->sc_lock)) {
875 		mutex_spin_exit(&sc->sc_intr_lock);
876 		mutex_enter(&sc->sc_lock);
877 		mutex_spin_enter(&sc->sc_intr_lock);
878 	}
879 
880 	/* Shut down DMA completely. */
881 	eso_write_mixreg(sc, ESO_MIXREG_A2C1, 0);
882 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, ESO_IO_A2DMAM, 0);
883 
884 	return error == EWOULDBLOCK ? 0 : error;
885 }
886 
887 static int
888 eso_halt_input(void *hdl)
889 {
890 	struct eso_softc *sc;
891 	int error;
892 
893 	sc = hdl;
894 	DPRINTF(("%s: halt_input\n", device_xname(&sc->sc_dev)));
895 
896 	/* Just like eso_halt_output(), but for Audio 1. */
897 	eso_write_ctlreg(sc, ESO_CTLREG_A1C2,
898 	    ESO_CTLREG_A1C2_READ | ESO_CTLREG_A1C2_ADC |
899 	    ESO_CTLREG_A1C2_DMAENB);
900 	bus_space_write_1(sc->sc_dmac_iot, sc->sc_dmac_ioh, ESO_DMAC_MODE,
901 	    DMA37MD_WRITE | DMA37MD_DEMAND);
902 
903 	sc->sc_rintr = NULL;
904 	mutex_exit(&sc->sc_lock);
905 	error = cv_timedwait_sig(&sc->sc_rcv, &sc->sc_intr_lock, sc->sc_rdrain);
906 	if (!mutex_tryenter(&sc->sc_lock)) {
907 		mutex_spin_exit(&sc->sc_intr_lock);
908 		mutex_enter(&sc->sc_lock);
909 		mutex_spin_enter(&sc->sc_intr_lock);
910 	}
911 
912 	/* Shut down DMA completely. */
913 	eso_write_ctlreg(sc, ESO_CTLREG_A1C2,
914 	    ESO_CTLREG_A1C2_READ | ESO_CTLREG_A1C2_ADC);
915 	bus_space_write_1(sc->sc_dmac_iot, sc->sc_dmac_ioh, ESO_DMAC_MASK,
916 	    ESO_DMAC_MASK_MASK);
917 
918 	return error == EWOULDBLOCK ? 0 : error;
919 }
920 
921 static int
922 eso_getdev(void *hdl, struct audio_device *retp)
923 {
924 	struct eso_softc *sc;
925 
926 	sc = hdl;
927 	strncpy(retp->name, "ESS Solo-1", sizeof (retp->name));
928 	snprintf(retp->version, sizeof (retp->version), "0x%02x",
929 	    sc->sc_revision);
930 	if (sc->sc_revision <
931 	    sizeof (eso_rev2model) / sizeof (eso_rev2model[0]))
932 		strncpy(retp->config, eso_rev2model[sc->sc_revision],
933 		    sizeof (retp->config));
934 	else
935 		strncpy(retp->config, "unknown", sizeof (retp->config));
936 
937 	return 0;
938 }
939 
940 static int
941 eso_set_port(void *hdl, mixer_ctrl_t *cp)
942 {
943 	struct eso_softc *sc;
944 	unsigned int lgain, rgain;
945 	uint8_t tmp;
946 	int error;
947 
948 	sc = hdl;
949 	error = 0;
950 
951 	mutex_spin_enter(&sc->sc_intr_lock);
952 
953 	switch (cp->dev) {
954 	case ESO_DAC_PLAY_VOL:
955 	case ESO_MIC_PLAY_VOL:
956 	case ESO_LINE_PLAY_VOL:
957 	case ESO_SYNTH_PLAY_VOL:
958 	case ESO_CD_PLAY_VOL:
959 	case ESO_AUXB_PLAY_VOL:
960 	case ESO_RECORD_VOL:
961 	case ESO_DAC_REC_VOL:
962 	case ESO_MIC_REC_VOL:
963 	case ESO_LINE_REC_VOL:
964 	case ESO_SYNTH_REC_VOL:
965 	case ESO_CD_REC_VOL:
966 	case ESO_AUXB_REC_VOL:
967 		if (cp->type != AUDIO_MIXER_VALUE) {
968 			error = EINVAL;
969 			break;
970 		}
971 
972 		/*
973 		 * Stereo-capable mixer ports: if we get a single-channel
974 		 * gain value passed in, then we duplicate it to both left
975 		 * and right channels.
976 		 */
977 		switch (cp->un.value.num_channels) {
978 		case 1:
979 			lgain = rgain = ESO_GAIN_TO_4BIT(
980 			    cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
981 			break;
982 		case 2:
983 			lgain = ESO_GAIN_TO_4BIT(
984 			    cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
985 			rgain = ESO_GAIN_TO_4BIT(
986 			    cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT]);
987 			break;
988 		default:
989 			error = EINVAL;
990 			break;
991 		}
992 
993 		if (!error) {
994 			sc->sc_gain[cp->dev][ESO_LEFT] = lgain;
995 			sc->sc_gain[cp->dev][ESO_RIGHT] = rgain;
996 			eso_set_gain(sc, cp->dev);
997 		}
998 		break;
999 
1000 	case ESO_MASTER_VOL:
1001 		if (cp->type != AUDIO_MIXER_VALUE) {
1002 			error = EINVAL;
1003 			break;
1004 		}
1005 
1006 		/* Like above, but a precision of 6 bits. */
1007 		switch (cp->un.value.num_channels) {
1008 		case 1:
1009 			lgain = rgain = ESO_GAIN_TO_6BIT(
1010 			    cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
1011 			break;
1012 		case 2:
1013 			lgain = ESO_GAIN_TO_6BIT(
1014 			    cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
1015 			rgain = ESO_GAIN_TO_6BIT(
1016 			    cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT]);
1017 			break;
1018 		default:
1019 			error = EINVAL;
1020 			break;
1021 		}
1022 
1023 		if (!error) {
1024 			sc->sc_gain[cp->dev][ESO_LEFT] = lgain;
1025 			sc->sc_gain[cp->dev][ESO_RIGHT] = rgain;
1026 			eso_set_gain(sc, cp->dev);
1027 		}
1028 		break;
1029 
1030 	case ESO_SPATIALIZER:
1031 		if (cp->type != AUDIO_MIXER_VALUE ||
1032 		    cp->un.value.num_channels != 1) {
1033 			error = EINVAL;
1034 			break;
1035 		}
1036 
1037 		sc->sc_gain[cp->dev][ESO_LEFT] =
1038 		    sc->sc_gain[cp->dev][ESO_RIGHT] =
1039 		    ESO_GAIN_TO_6BIT(
1040 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
1041 		eso_set_gain(sc, cp->dev);
1042 		break;
1043 
1044 	case ESO_MONO_PLAY_VOL:
1045 	case ESO_MONO_REC_VOL:
1046 		if (cp->type != AUDIO_MIXER_VALUE ||
1047 		    cp->un.value.num_channels != 1) {
1048 			error = EINVAL;
1049 			break;
1050 		}
1051 
1052 		sc->sc_gain[cp->dev][ESO_LEFT] =
1053 		    sc->sc_gain[cp->dev][ESO_RIGHT] =
1054 		    ESO_GAIN_TO_4BIT(
1055 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
1056 		eso_set_gain(sc, cp->dev);
1057 		break;
1058 
1059 	case ESO_PCSPEAKER_VOL:
1060 		if (cp->type != AUDIO_MIXER_VALUE ||
1061 		    cp->un.value.num_channels != 1) {
1062 			error = EINVAL;
1063 			break;
1064 		}
1065 
1066 		sc->sc_gain[cp->dev][ESO_LEFT] =
1067 		    sc->sc_gain[cp->dev][ESO_RIGHT] =
1068 		    ESO_GAIN_TO_3BIT(
1069 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);
1070 		eso_set_gain(sc, cp->dev);
1071 		break;
1072 
1073 	case ESO_SPATIALIZER_ENABLE:
1074 		if (cp->type != AUDIO_MIXER_ENUM) {
1075 			error = EINVAL;
1076 			break;
1077 		}
1078 
1079 		sc->sc_spatializer = (cp->un.ord != 0);
1080 
1081 		tmp = eso_read_mixreg(sc, ESO_MIXREG_SPAT);
1082 		if (sc->sc_spatializer)
1083 			tmp |= ESO_MIXREG_SPAT_ENB;
1084 		else
1085 			tmp &= ~ESO_MIXREG_SPAT_ENB;
1086 		eso_write_mixreg(sc, ESO_MIXREG_SPAT,
1087 		    tmp | ESO_MIXREG_SPAT_RSTREL);
1088 		break;
1089 
1090 	case ESO_MASTER_MUTE:
1091 		if (cp->type != AUDIO_MIXER_ENUM) {
1092 			error = EINVAL;
1093 			break;
1094 		}
1095 
1096 		sc->sc_mvmute = (cp->un.ord != 0);
1097 
1098 		if (sc->sc_mvmute) {
1099 			eso_write_mixreg(sc, ESO_MIXREG_LMVM,
1100 			    eso_read_mixreg(sc, ESO_MIXREG_LMVM) |
1101 			    ESO_MIXREG_LMVM_MUTE);
1102 			eso_write_mixreg(sc, ESO_MIXREG_RMVM,
1103 			    eso_read_mixreg(sc, ESO_MIXREG_RMVM) |
1104 			    ESO_MIXREG_RMVM_MUTE);
1105 		} else {
1106 			eso_write_mixreg(sc, ESO_MIXREG_LMVM,
1107 			    eso_read_mixreg(sc, ESO_MIXREG_LMVM) &
1108 			    ~ESO_MIXREG_LMVM_MUTE);
1109 			eso_write_mixreg(sc, ESO_MIXREG_RMVM,
1110 			    eso_read_mixreg(sc, ESO_MIXREG_RMVM) &
1111 			    ~ESO_MIXREG_RMVM_MUTE);
1112 		}
1113 		break;
1114 
1115 	case ESO_MONOOUT_SOURCE:
1116 		if (cp->type != AUDIO_MIXER_ENUM) {
1117 			error = EINVAL;
1118 			break;
1119 		}
1120 
1121 		error = eso_set_monooutsrc(sc, cp->un.ord);
1122 		break;
1123 
1124 	case ESO_MONOIN_BYPASS:
1125 		if (cp->type != AUDIO_MIXER_ENUM) {
1126 			error = EINVAL;
1127 			break;
1128 		}
1129 
1130 		error = (eso_set_monoinbypass(sc, cp->un.ord));
1131 		break;
1132 
1133 	case ESO_RECORD_MONITOR:
1134 		if (cp->type != AUDIO_MIXER_ENUM) {
1135 			error = EINVAL;
1136 			break;
1137 		}
1138 
1139 		sc->sc_recmon = (cp->un.ord != 0);
1140 
1141 		tmp = eso_read_ctlreg(sc, ESO_CTLREG_ACTL);
1142 		if (sc->sc_recmon)
1143 			tmp |= ESO_CTLREG_ACTL_RECMON;
1144 		else
1145 			tmp &= ~ESO_CTLREG_ACTL_RECMON;
1146 		eso_write_ctlreg(sc, ESO_CTLREG_ACTL, tmp);
1147 		break;
1148 
1149 	case ESO_RECORD_SOURCE:
1150 		if (cp->type != AUDIO_MIXER_ENUM) {
1151 			error = EINVAL;
1152 			break;
1153 		}
1154 
1155 		error = eso_set_recsrc(sc, cp->un.ord);
1156 		break;
1157 
1158 	case ESO_MIC_PREAMP:
1159 		if (cp->type != AUDIO_MIXER_ENUM) {
1160 			error = EINVAL;
1161 			break;
1162 		}
1163 
1164 		error = eso_set_preamp(sc, cp->un.ord);
1165 		break;
1166 
1167 	default:
1168 		error = EINVAL;
1169 		break;
1170 	}
1171 
1172 	mutex_spin_exit(&sc->sc_intr_lock);
1173 	return error;
1174 }
1175 
1176 static int
1177 eso_get_port(void *hdl, mixer_ctrl_t *cp)
1178 {
1179 	struct eso_softc *sc;
1180 	int error;
1181 
1182 	sc = hdl;
1183 	error = 0;
1184 
1185 	mutex_spin_enter(&sc->sc_intr_lock);
1186 
1187 	switch (cp->dev) {
1188 	case ESO_MASTER_VOL:
1189 		/* Reload from mixer after hardware volume control use. */
1190 		if (sc->sc_gain[cp->dev][ESO_LEFT] == (uint8_t)~0)
1191 			eso_reload_master_vol(sc);
1192 		/* FALLTHROUGH */
1193 	case ESO_DAC_PLAY_VOL:
1194 	case ESO_MIC_PLAY_VOL:
1195 	case ESO_LINE_PLAY_VOL:
1196 	case ESO_SYNTH_PLAY_VOL:
1197 	case ESO_CD_PLAY_VOL:
1198 	case ESO_AUXB_PLAY_VOL:
1199 	case ESO_RECORD_VOL:
1200 	case ESO_DAC_REC_VOL:
1201 	case ESO_MIC_REC_VOL:
1202 	case ESO_LINE_REC_VOL:
1203 	case ESO_SYNTH_REC_VOL:
1204 	case ESO_CD_REC_VOL:
1205 	case ESO_AUXB_REC_VOL:
1206 		/*
1207 		 * Stereo-capable ports: if a single-channel query is made,
1208 		 * just return the left channel's value (since single-channel
1209 		 * settings themselves are applied to both channels).
1210 		 */
1211 		switch (cp->un.value.num_channels) {
1212 		case 1:
1213 			cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
1214 			    sc->sc_gain[cp->dev][ESO_LEFT];
1215 			break;
1216 		case 2:
1217 			cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
1218 			    sc->sc_gain[cp->dev][ESO_LEFT];
1219 			cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
1220 			    sc->sc_gain[cp->dev][ESO_RIGHT];
1221 			break;
1222 		default:
1223 			error = EINVAL;
1224 			break;
1225 		}
1226 		break;
1227 
1228 	case ESO_MONO_PLAY_VOL:
1229 	case ESO_PCSPEAKER_VOL:
1230 	case ESO_MONO_REC_VOL:
1231 	case ESO_SPATIALIZER:
1232 		if (cp->un.value.num_channels != 1) {
1233 			error = EINVAL;
1234 			break;
1235 		}
1236 		cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] =
1237 		    sc->sc_gain[cp->dev][ESO_LEFT];
1238 		break;
1239 
1240 	case ESO_RECORD_MONITOR:
1241 		cp->un.ord = sc->sc_recmon;
1242 		break;
1243 
1244 	case ESO_RECORD_SOURCE:
1245 		cp->un.ord = sc->sc_recsrc;
1246 		break;
1247 
1248 	case ESO_MONOOUT_SOURCE:
1249 		cp->un.ord = sc->sc_monooutsrc;
1250 		break;
1251 
1252 	case ESO_MONOIN_BYPASS:
1253 		cp->un.ord = sc->sc_monoinbypass;
1254 		break;
1255 
1256 	case ESO_SPATIALIZER_ENABLE:
1257 		cp->un.ord = sc->sc_spatializer;
1258 		break;
1259 
1260 	case ESO_MIC_PREAMP:
1261 		cp->un.ord = sc->sc_preamp;
1262 		break;
1263 
1264 	case ESO_MASTER_MUTE:
1265 		/* Reload from mixer after hardware volume control use. */
1266 		if (sc->sc_gain[ESO_MASTER_VOL][ESO_LEFT] == (uint8_t)~0)
1267 			eso_reload_master_vol(sc);
1268 		cp->un.ord = sc->sc_mvmute;
1269 		break;
1270 
1271 	default:
1272 		error = EINVAL;
1273 		break;
1274 	}
1275 
1276 	mutex_spin_exit(&sc->sc_intr_lock);
1277 	return 0;
1278 }
1279 
1280 static int
1281 eso_query_devinfo(void *hdl, mixer_devinfo_t *dip)
1282 {
1283 
1284 	switch (dip->index) {
1285 	case ESO_DAC_PLAY_VOL:
1286 		dip->mixer_class = ESO_INPUT_CLASS;
1287 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1288 		strcpy(dip->label.name, AudioNdac);
1289 		dip->type = AUDIO_MIXER_VALUE;
1290 		dip->un.v.num_channels = 2;
1291 		strcpy(dip->un.v.units.name, AudioNvolume);
1292 		break;
1293 	case ESO_MIC_PLAY_VOL:
1294 		dip->mixer_class = ESO_INPUT_CLASS;
1295 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1296 		strcpy(dip->label.name, AudioNmicrophone);
1297 		dip->type = AUDIO_MIXER_VALUE;
1298 		dip->un.v.num_channels = 2;
1299 		strcpy(dip->un.v.units.name, AudioNvolume);
1300 		break;
1301 	case ESO_LINE_PLAY_VOL:
1302 		dip->mixer_class = ESO_INPUT_CLASS;
1303 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1304 		strcpy(dip->label.name, AudioNline);
1305 		dip->type = AUDIO_MIXER_VALUE;
1306 		dip->un.v.num_channels = 2;
1307 		strcpy(dip->un.v.units.name, AudioNvolume);
1308 		break;
1309 	case ESO_SYNTH_PLAY_VOL:
1310 		dip->mixer_class = ESO_INPUT_CLASS;
1311 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1312 		strcpy(dip->label.name, AudioNfmsynth);
1313 		dip->type = AUDIO_MIXER_VALUE;
1314 		dip->un.v.num_channels = 2;
1315 		strcpy(dip->un.v.units.name, AudioNvolume);
1316 		break;
1317 	case ESO_MONO_PLAY_VOL:
1318 		dip->mixer_class = ESO_INPUT_CLASS;
1319 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1320 		strcpy(dip->label.name, "mono_in");
1321 		dip->type = AUDIO_MIXER_VALUE;
1322 		dip->un.v.num_channels = 1;
1323 		strcpy(dip->un.v.units.name, AudioNvolume);
1324 		break;
1325 	case ESO_CD_PLAY_VOL:
1326 		dip->mixer_class = ESO_INPUT_CLASS;
1327 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1328 		strcpy(dip->label.name, AudioNcd);
1329 		dip->type = AUDIO_MIXER_VALUE;
1330 		dip->un.v.num_channels = 2;
1331 		strcpy(dip->un.v.units.name, AudioNvolume);
1332 		break;
1333 	case ESO_AUXB_PLAY_VOL:
1334 		dip->mixer_class = ESO_INPUT_CLASS;
1335 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1336 		strcpy(dip->label.name, "auxb");
1337 		dip->type = AUDIO_MIXER_VALUE;
1338 		dip->un.v.num_channels = 2;
1339 		strcpy(dip->un.v.units.name, AudioNvolume);
1340 		break;
1341 
1342 	case ESO_MIC_PREAMP:
1343 		dip->mixer_class = ESO_MICROPHONE_CLASS;
1344 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1345 		strcpy(dip->label.name, AudioNpreamp);
1346 		dip->type = AUDIO_MIXER_ENUM;
1347 		dip->un.e.num_mem = 2;
1348 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
1349 		dip->un.e.member[0].ord = 0;
1350 		strcpy(dip->un.e.member[1].label.name, AudioNon);
1351 		dip->un.e.member[1].ord = 1;
1352 		break;
1353 	case ESO_MICROPHONE_CLASS:
1354 		dip->mixer_class = ESO_MICROPHONE_CLASS;
1355 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1356 		strcpy(dip->label.name, AudioNmicrophone);
1357 		dip->type = AUDIO_MIXER_CLASS;
1358 		break;
1359 
1360 	case ESO_INPUT_CLASS:
1361 		dip->mixer_class = ESO_INPUT_CLASS;
1362 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1363 		strcpy(dip->label.name, AudioCinputs);
1364 		dip->type = AUDIO_MIXER_CLASS;
1365 		break;
1366 
1367 	case ESO_MASTER_VOL:
1368 		dip->mixer_class = ESO_OUTPUT_CLASS;
1369 		dip->prev = AUDIO_MIXER_LAST;
1370 		dip->next = ESO_MASTER_MUTE;
1371 		strcpy(dip->label.name, AudioNmaster);
1372 		dip->type = AUDIO_MIXER_VALUE;
1373 		dip->un.v.num_channels = 2;
1374 		strcpy(dip->un.v.units.name, AudioNvolume);
1375 		break;
1376 	case ESO_MASTER_MUTE:
1377 		dip->mixer_class = ESO_OUTPUT_CLASS;
1378 		dip->prev = ESO_MASTER_VOL;
1379 		dip->next = AUDIO_MIXER_LAST;
1380 		strcpy(dip->label.name, AudioNmute);
1381 		dip->type = AUDIO_MIXER_ENUM;
1382 		dip->un.e.num_mem = 2;
1383 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
1384 		dip->un.e.member[0].ord = 0;
1385 		strcpy(dip->un.e.member[1].label.name, AudioNon);
1386 		dip->un.e.member[1].ord = 1;
1387 		break;
1388 
1389 	case ESO_PCSPEAKER_VOL:
1390 		dip->mixer_class = ESO_OUTPUT_CLASS;
1391 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1392 		strcpy(dip->label.name, "pc_speaker");
1393 		dip->type = AUDIO_MIXER_VALUE;
1394 		dip->un.v.num_channels = 1;
1395 		strcpy(dip->un.v.units.name, AudioNvolume);
1396 		break;
1397 	case ESO_MONOOUT_SOURCE:
1398 		dip->mixer_class = ESO_OUTPUT_CLASS;
1399 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1400 		strcpy(dip->label.name, "mono_out");
1401 		dip->type = AUDIO_MIXER_ENUM;
1402 		dip->un.e.num_mem = 3;
1403 		strcpy(dip->un.e.member[0].label.name, AudioNmute);
1404 		dip->un.e.member[0].ord = ESO_MIXREG_MPM_MOMUTE;
1405 		strcpy(dip->un.e.member[1].label.name, AudioNdac);
1406 		dip->un.e.member[1].ord = ESO_MIXREG_MPM_MOA2R;
1407 		strcpy(dip->un.e.member[2].label.name, AudioNmixerout);
1408 		dip->un.e.member[2].ord = ESO_MIXREG_MPM_MOREC;
1409 		break;
1410 
1411 	case ESO_MONOIN_BYPASS:
1412 		dip->mixer_class = ESO_MONOIN_CLASS;
1413 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1414 		strcpy(dip->label.name, "bypass");
1415 		dip->type = AUDIO_MIXER_ENUM;
1416 		dip->un.e.num_mem = 2;
1417 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
1418 		dip->un.e.member[0].ord = 0;
1419 		strcpy(dip->un.e.member[1].label.name, AudioNon);
1420 		dip->un.e.member[1].ord = 1;
1421 		break;
1422 	case ESO_MONOIN_CLASS:
1423 		dip->mixer_class = ESO_MONOIN_CLASS;
1424 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1425 		strcpy(dip->label.name, "mono_in");
1426 		dip->type = AUDIO_MIXER_CLASS;
1427 		break;
1428 
1429 	case ESO_SPATIALIZER:
1430 		dip->mixer_class = ESO_OUTPUT_CLASS;
1431 		dip->prev = AUDIO_MIXER_LAST;
1432 		dip->next = ESO_SPATIALIZER_ENABLE;
1433 		strcpy(dip->label.name, AudioNspatial);
1434 		dip->type = AUDIO_MIXER_VALUE;
1435 		dip->un.v.num_channels = 1;
1436 		strcpy(dip->un.v.units.name, "level");
1437 		break;
1438 	case ESO_SPATIALIZER_ENABLE:
1439 		dip->mixer_class = ESO_OUTPUT_CLASS;
1440 		dip->prev = ESO_SPATIALIZER;
1441 		dip->next = AUDIO_MIXER_LAST;
1442 		strcpy(dip->label.name, "enable");
1443 		dip->type = AUDIO_MIXER_ENUM;
1444 		dip->un.e.num_mem = 2;
1445 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
1446 		dip->un.e.member[0].ord = 0;
1447 		strcpy(dip->un.e.member[1].label.name, AudioNon);
1448 		dip->un.e.member[1].ord = 1;
1449 		break;
1450 
1451 	case ESO_OUTPUT_CLASS:
1452 		dip->mixer_class = ESO_OUTPUT_CLASS;
1453 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1454 		strcpy(dip->label.name, AudioCoutputs);
1455 		dip->type = AUDIO_MIXER_CLASS;
1456 		break;
1457 
1458 	case ESO_RECORD_MONITOR:
1459 		dip->mixer_class = ESO_MONITOR_CLASS;
1460 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1461 		strcpy(dip->label.name, AudioNmute);
1462 		dip->type = AUDIO_MIXER_ENUM;
1463 		dip->un.e.num_mem = 2;
1464 		strcpy(dip->un.e.member[0].label.name, AudioNoff);
1465 		dip->un.e.member[0].ord = 0;
1466 		strcpy(dip->un.e.member[1].label.name, AudioNon);
1467 		dip->un.e.member[1].ord = 1;
1468 		break;
1469 	case ESO_MONITOR_CLASS:
1470 		dip->mixer_class = ESO_MONITOR_CLASS;
1471 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1472 		strcpy(dip->label.name, AudioCmonitor);
1473 		dip->type = AUDIO_MIXER_CLASS;
1474 		break;
1475 
1476 	case ESO_RECORD_VOL:
1477 		dip->mixer_class = ESO_RECORD_CLASS;
1478 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1479 		strcpy(dip->label.name, AudioNrecord);
1480 		dip->type = AUDIO_MIXER_VALUE;
1481 		strcpy(dip->un.v.units.name, AudioNvolume);
1482 		break;
1483 	case ESO_RECORD_SOURCE:
1484 		dip->mixer_class = ESO_RECORD_CLASS;
1485 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1486 		strcpy(dip->label.name, AudioNsource);
1487 		dip->type = AUDIO_MIXER_ENUM;
1488 		dip->un.e.num_mem = 4;
1489 		strcpy(dip->un.e.member[0].label.name, AudioNmicrophone);
1490 		dip->un.e.member[0].ord = ESO_MIXREG_ERS_MIC;
1491 		strcpy(dip->un.e.member[1].label.name, AudioNline);
1492 		dip->un.e.member[1].ord = ESO_MIXREG_ERS_LINE;
1493 		strcpy(dip->un.e.member[2].label.name, AudioNcd);
1494 		dip->un.e.member[2].ord = ESO_MIXREG_ERS_CD;
1495 		strcpy(dip->un.e.member[3].label.name, AudioNmixerout);
1496 		dip->un.e.member[3].ord = ESO_MIXREG_ERS_MIXER;
1497 		break;
1498 	case ESO_DAC_REC_VOL:
1499 		dip->mixer_class = ESO_RECORD_CLASS;
1500 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1501 		strcpy(dip->label.name, AudioNdac);
1502 		dip->type = AUDIO_MIXER_VALUE;
1503 		dip->un.v.num_channels = 2;
1504 		strcpy(dip->un.v.units.name, AudioNvolume);
1505 		break;
1506 	case ESO_MIC_REC_VOL:
1507 		dip->mixer_class = ESO_RECORD_CLASS;
1508 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1509 		strcpy(dip->label.name, AudioNmicrophone);
1510 		dip->type = AUDIO_MIXER_VALUE;
1511 		dip->un.v.num_channels = 2;
1512 		strcpy(dip->un.v.units.name, AudioNvolume);
1513 		break;
1514 	case ESO_LINE_REC_VOL:
1515 		dip->mixer_class = ESO_RECORD_CLASS;
1516 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1517 		strcpy(dip->label.name, AudioNline);
1518 		dip->type = AUDIO_MIXER_VALUE;
1519 		dip->un.v.num_channels = 2;
1520 		strcpy(dip->un.v.units.name, AudioNvolume);
1521 		break;
1522 	case ESO_SYNTH_REC_VOL:
1523 		dip->mixer_class = ESO_RECORD_CLASS;
1524 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1525 		strcpy(dip->label.name, AudioNfmsynth);
1526 		dip->type = AUDIO_MIXER_VALUE;
1527 		dip->un.v.num_channels = 2;
1528 		strcpy(dip->un.v.units.name, AudioNvolume);
1529 		break;
1530 	case ESO_MONO_REC_VOL:
1531 		dip->mixer_class = ESO_RECORD_CLASS;
1532 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1533 		strcpy(dip->label.name, "mono_in");
1534 		dip->type = AUDIO_MIXER_VALUE;
1535 		dip->un.v.num_channels = 1; /* No lies */
1536 		strcpy(dip->un.v.units.name, AudioNvolume);
1537 		break;
1538 	case ESO_CD_REC_VOL:
1539 		dip->mixer_class = ESO_RECORD_CLASS;
1540 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1541 		strcpy(dip->label.name, AudioNcd);
1542 		dip->type = AUDIO_MIXER_VALUE;
1543 		dip->un.v.num_channels = 2;
1544 		strcpy(dip->un.v.units.name, AudioNvolume);
1545 		break;
1546 	case ESO_AUXB_REC_VOL:
1547 		dip->mixer_class = ESO_RECORD_CLASS;
1548 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1549 		strcpy(dip->label.name, "auxb");
1550 		dip->type = AUDIO_MIXER_VALUE;
1551 		dip->un.v.num_channels = 2;
1552 		strcpy(dip->un.v.units.name, AudioNvolume);
1553 		break;
1554 	case ESO_RECORD_CLASS:
1555 		dip->mixer_class = ESO_RECORD_CLASS;
1556 		dip->next = dip->prev = AUDIO_MIXER_LAST;
1557 		strcpy(dip->label.name, AudioCrecord);
1558 		dip->type = AUDIO_MIXER_CLASS;
1559 		break;
1560 
1561 	default:
1562 		return ENXIO;
1563 	}
1564 
1565 	return 0;
1566 }
1567 
1568 static int
1569 eso_allocmem(struct eso_softc *sc, size_t size, size_t align,
1570     size_t boundary, int direction, struct eso_dma *ed)
1571 {
1572 	int error;
1573 
1574 	ed->ed_size = size;
1575 
1576 	error = bus_dmamem_alloc(ed->ed_dmat, ed->ed_size, align, boundary,
1577 	    ed->ed_segs, sizeof (ed->ed_segs) / sizeof (ed->ed_segs[0]),
1578 	    &ed->ed_nsegs, BUS_DMA_WAITOK);
1579 	if (error)
1580 		goto out;
1581 
1582 	error = bus_dmamem_map(ed->ed_dmat, ed->ed_segs, ed->ed_nsegs,
1583 	    ed->ed_size, &ed->ed_kva, BUS_DMA_WAITOK | BUS_DMA_COHERENT);
1584 	if (error)
1585 		goto free;
1586 
1587 	error = bus_dmamap_create(ed->ed_dmat, ed->ed_size, 1, ed->ed_size, 0,
1588 	    BUS_DMA_WAITOK, &ed->ed_map);
1589 	if (error)
1590 		goto unmap;
1591 
1592 	error = bus_dmamap_load(ed->ed_dmat, ed->ed_map, ed->ed_kva,
1593 	    ed->ed_size, NULL, BUS_DMA_WAITOK |
1594 	    (direction == AUMODE_RECORD) ? BUS_DMA_READ : BUS_DMA_WRITE);
1595 	if (error)
1596 		goto destroy;
1597 
1598 	return 0;
1599 
1600  destroy:
1601 	bus_dmamap_destroy(ed->ed_dmat, ed->ed_map);
1602  unmap:
1603 	bus_dmamem_unmap(ed->ed_dmat, ed->ed_kva, ed->ed_size);
1604  free:
1605 	bus_dmamem_free(ed->ed_dmat, ed->ed_segs, ed->ed_nsegs);
1606  out:
1607 	return error;
1608 }
1609 
1610 static void
1611 eso_freemem(struct eso_dma *ed)
1612 {
1613 
1614 	bus_dmamap_unload(ed->ed_dmat, ed->ed_map);
1615 	bus_dmamap_destroy(ed->ed_dmat, ed->ed_map);
1616 	bus_dmamem_unmap(ed->ed_dmat, ed->ed_kva, ed->ed_size);
1617 	bus_dmamem_free(ed->ed_dmat, ed->ed_segs, ed->ed_nsegs);
1618 }
1619 
1620 static struct eso_dma *
1621 eso_kva2dma(const struct eso_softc *sc, const void *kva)
1622 {
1623 	struct eso_dma *p;
1624 
1625 	SLIST_FOREACH(p, &sc->sc_dmas, ed_slist) {
1626 		if (KVADDR(p) == kva)
1627 			return p;
1628 	}
1629 
1630 	panic("%s: kva2dma: bad kva: %p", sc->sc_dev.dv_xname, kva);
1631 	/* NOTREACHED */
1632 }
1633 
1634 static void *
1635 eso_allocm(void *hdl, int direction, size_t size)
1636 {
1637 	struct eso_softc *sc;
1638 	struct eso_dma *ed;
1639 	size_t boundary;
1640 	int error;
1641 
1642 	sc = hdl;
1643 	if ((ed = kmem_alloc(sizeof (*ed), KM_SLEEP)) == NULL)
1644 		return NULL;
1645 
1646 	/*
1647 	 * Apparently the Audio 1 DMA controller's current address
1648 	 * register can't roll over a 64K address boundary, so we have to
1649 	 * take care of that ourselves.  Similarly, the Audio 2 DMA
1650 	 * controller needs a 1M address boundary.
1651 	 */
1652 	if (direction == AUMODE_RECORD)
1653 		boundary = 0x10000;
1654 	else
1655 		boundary = 0x100000;
1656 
1657 	/*
1658 	 * XXX Work around allocation problems for Audio 1, which
1659 	 * XXX implements the 24 low address bits only, with
1660 	 * XXX machine-specific DMA tag use.
1661 	 */
1662 #ifdef alpha
1663 	/*
1664 	 * XXX Force allocation through the (ISA) SGMAP.
1665 	 */
1666 	if (direction == AUMODE_RECORD)
1667 		ed->ed_dmat = alphabus_dma_get_tag(sc->sc_dmat, ALPHA_BUS_ISA);
1668 	else
1669 #elif defined(amd64) || defined(i386)
1670 	/*
1671 	 * XXX Force allocation through the ISA DMA tag.
1672 	 */
1673 	if (direction == AUMODE_RECORD)
1674 		ed->ed_dmat = &isa_bus_dma_tag;
1675 	else
1676 #endif
1677 		ed->ed_dmat = sc->sc_dmat;
1678 
1679 	error = eso_allocmem(sc, size, 32, boundary, direction, ed);
1680 	if (error) {
1681 		kmem_free(ed, sizeof(*ed));
1682 		return NULL;
1683 	}
1684 	SLIST_INSERT_HEAD(&sc->sc_dmas, ed, ed_slist);
1685 
1686 	return KVADDR(ed);
1687 }
1688 
1689 static void
1690 eso_freem(void *hdl, void *addr, size_t size)
1691 {
1692 	struct eso_softc *sc;
1693 	struct eso_dma *p;
1694 
1695 	sc = hdl;
1696 	p = eso_kva2dma(sc, addr);
1697 
1698 	SLIST_REMOVE(&sc->sc_dmas, p, eso_dma, ed_slist);
1699 	eso_freemem(p);
1700 	kmem_free(p, sizeof(*p));
1701 }
1702 
1703 static size_t
1704 eso_round_buffersize(void *hdl, int direction, size_t bufsize)
1705 {
1706 	size_t maxsize;
1707 
1708 	/*
1709 	 * The playback DMA buffer size on the Solo-1 is limited to 0xfff0
1710 	 * bytes.  This is because IO_A2DMAC is a two byte value
1711 	 * indicating the literal byte count, and the 4 least significant
1712 	 * bits are read-only.  Zero is not used as a special case for
1713 	 * 0x10000.
1714 	 *
1715 	 * For recording, DMAC_DMAC is the byte count - 1, so 0x10000 can
1716 	 * be represented.
1717 	 */
1718 	maxsize = (direction == AUMODE_PLAY) ? 0xfff0 : 0x10000;
1719 
1720 	if (bufsize > maxsize)
1721 		bufsize = maxsize;
1722 
1723 	return bufsize;
1724 }
1725 
1726 static paddr_t
1727 eso_mappage(void *hdl, void *addr, off_t offs, int prot)
1728 {
1729 	struct eso_softc *sc;
1730 	struct eso_dma *ed;
1731 
1732 	sc = hdl;
1733 	if (offs < 0)
1734 		return -1;
1735 	ed = eso_kva2dma(sc, addr);
1736 
1737 	return bus_dmamem_mmap(ed->ed_dmat, ed->ed_segs, ed->ed_nsegs,
1738 	    offs, prot, BUS_DMA_WAITOK);
1739 }
1740 
1741 /* ARGSUSED */
1742 static int
1743 eso_get_props(void *hdl)
1744 {
1745 
1746 	return AUDIO_PROP_MMAP | AUDIO_PROP_INDEPENDENT |
1747 	    AUDIO_PROP_FULLDUPLEX;
1748 }
1749 
1750 static int
1751 eso_trigger_output(void *hdl, void *start, void *end, int blksize,
1752     void (*intr)(void *), void *arg, const audio_params_t *param)
1753 {
1754 	struct eso_softc *sc;
1755 	struct eso_dma *ed;
1756 	uint8_t a2c1;
1757 
1758 	sc = hdl;
1759 	DPRINTF((
1760 	    "%s: trigger_output: start %p, end %p, blksize %d, intr %p(%p)\n",
1761 	    device_xname(&sc->sc_dev), start, end, blksize, intr, arg));
1762 	DPRINTF(("%s: param: rate %u, encoding %u, precision %u, channels %u\n",
1763 	    device_xname(&sc->sc_dev), param->sample_rate, param->encoding,
1764 	    param->precision, param->channels));
1765 
1766 	/* Find DMA buffer. */
1767 	ed = eso_kva2dma(sc, start);
1768 	DPRINTF(("%s: dmaaddr %lx\n",
1769 	    device_xname(&sc->sc_dev), (unsigned long)DMAADDR(ed)));
1770 
1771 	sc->sc_pintr = intr;
1772 	sc->sc_parg = arg;
1773 
1774 	/* Compute drain timeout. */
1775 	sc->sc_pdrain = (blksize * NBBY * hz) /
1776 	    (param->sample_rate * param->channels *
1777 	     param->precision) + 2;	/* slop */
1778 
1779 	/* DMA transfer count (in `words'!) reload using 2's complement. */
1780 	blksize = -(blksize >> 1);
1781 	eso_write_mixreg(sc, ESO_MIXREG_A2TCRLO, blksize & 0xff);
1782 	eso_write_mixreg(sc, ESO_MIXREG_A2TCRHI, blksize >> 8);
1783 
1784 	/* Update DAC to reflect DMA count and audio parameters. */
1785 	/* Note: we cache A2C2 in order to avoid r/m/w at interrupt time. */
1786 	if (param->precision == 16)
1787 		sc->sc_a2c2 |= ESO_MIXREG_A2C2_16BIT;
1788 	else
1789 		sc->sc_a2c2 &= ~ESO_MIXREG_A2C2_16BIT;
1790 	if (param->channels == 2)
1791 		sc->sc_a2c2 |= ESO_MIXREG_A2C2_STEREO;
1792 	else
1793 		sc->sc_a2c2 &= ~ESO_MIXREG_A2C2_STEREO;
1794 	if (param->encoding == AUDIO_ENCODING_SLINEAR_BE ||
1795 	    param->encoding == AUDIO_ENCODING_SLINEAR_LE)
1796 		sc->sc_a2c2 |= ESO_MIXREG_A2C2_SIGNED;
1797 	else
1798 		sc->sc_a2c2 &= ~ESO_MIXREG_A2C2_SIGNED;
1799 	/* Unmask IRQ. */
1800 	sc->sc_a2c2 |= ESO_MIXREG_A2C2_IRQM;
1801 	eso_write_mixreg(sc, ESO_MIXREG_A2C2, sc->sc_a2c2);
1802 
1803 	/* Set up DMA controller. */
1804 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, ESO_IO_A2DMAA,
1805 	    DMAADDR(ed));
1806 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, ESO_IO_A2DMAC,
1807 	    (uint8_t *)end - (uint8_t *)start);
1808 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, ESO_IO_A2DMAM,
1809 	    ESO_IO_A2DMAM_DMAENB | ESO_IO_A2DMAM_AUTO);
1810 
1811 	/* Start DMA. */
1812 	a2c1 = eso_read_mixreg(sc, ESO_MIXREG_A2C1);
1813 	a2c1 &= ~ESO_MIXREG_A2C1_RESV0; /* Paranoia? XXX bit 5 */
1814 	a2c1 |= ESO_MIXREG_A2C1_FIFOENB | ESO_MIXREG_A2C1_DMAENB |
1815 	    ESO_MIXREG_A2C1_AUTO;
1816 	eso_write_mixreg(sc, ESO_MIXREG_A2C1, a2c1);
1817 
1818 	return 0;
1819 }
1820 
1821 static int
1822 eso_trigger_input(void *hdl, void *start, void *end, int blksize,
1823     void (*intr)(void *), void *arg, const audio_params_t *param)
1824 {
1825 	struct eso_softc *sc;
1826 	struct eso_dma *ed;
1827 	uint8_t actl, a1c1;
1828 
1829 	sc = hdl;
1830 	DPRINTF((
1831 	    "%s: trigger_input: start %p, end %p, blksize %d, intr %p(%p)\n",
1832 	    device_xname(&sc->sc_dev), start, end, blksize, intr, arg));
1833 	DPRINTF(("%s: param: rate %u, encoding %u, precision %u, channels %u\n",
1834 	    device_xname(&sc->sc_dev), param->sample_rate, param->encoding,
1835 	    param->precision, param->channels));
1836 
1837 	/*
1838 	 * If we failed to configure the Audio 1 DMA controller, bail here
1839 	 * while retaining availability of the DAC direction (in Audio 2).
1840 	 */
1841 	if (!sc->sc_dmac_configured)
1842 		return EIO;
1843 
1844 	/* Find DMA buffer. */
1845 	ed = eso_kva2dma(sc, start);
1846 	DPRINTF(("%s: dmaaddr %lx\n",
1847 	    device_xname(&sc->sc_dev), (unsigned long)DMAADDR(ed)));
1848 
1849 	sc->sc_rintr = intr;
1850 	sc->sc_rarg = arg;
1851 
1852 	/* Compute drain timeout. */
1853 	sc->sc_rdrain = (blksize * NBBY * hz) /
1854 	    (param->sample_rate * param->channels *
1855 	     param->precision) + 2;	/* slop */
1856 
1857 	/* Set up ADC DMA converter parameters. */
1858 	actl = eso_read_ctlreg(sc, ESO_CTLREG_ACTL);
1859 	if (param->channels == 2) {
1860 		actl &= ~ESO_CTLREG_ACTL_MONO;
1861 		actl |= ESO_CTLREG_ACTL_STEREO;
1862 	} else {
1863 		actl &= ~ESO_CTLREG_ACTL_STEREO;
1864 		actl |= ESO_CTLREG_ACTL_MONO;
1865 	}
1866 	eso_write_ctlreg(sc, ESO_CTLREG_ACTL, actl);
1867 
1868 	/* Set up Transfer Type: maybe move to attach time? */
1869 	eso_write_ctlreg(sc, ESO_CTLREG_A1TT, ESO_CTLREG_A1TT_DEMAND4);
1870 
1871 	/* DMA transfer count reload using 2's complement. */
1872 	blksize = -blksize;
1873 	eso_write_ctlreg(sc, ESO_CTLREG_A1TCRLO, blksize & 0xff);
1874 	eso_write_ctlreg(sc, ESO_CTLREG_A1TCRHI, blksize >> 8);
1875 
1876 	/* Set up and enable Audio 1 DMA FIFO. */
1877 	a1c1 = ESO_CTLREG_A1C1_RESV1 | ESO_CTLREG_A1C1_FIFOENB;
1878 	if (param->precision == 16)
1879 		a1c1 |= ESO_CTLREG_A1C1_16BIT;
1880 	if (param->channels == 2)
1881 		a1c1 |= ESO_CTLREG_A1C1_STEREO;
1882 	else
1883 		a1c1 |= ESO_CTLREG_A1C1_MONO;
1884 	if (param->encoding == AUDIO_ENCODING_SLINEAR_BE ||
1885 	    param->encoding == AUDIO_ENCODING_SLINEAR_LE)
1886 		a1c1 |= ESO_CTLREG_A1C1_SIGNED;
1887 	eso_write_ctlreg(sc, ESO_CTLREG_A1C1, a1c1);
1888 
1889 	/* Set up ADC IRQ/DRQ parameters. */
1890 	eso_write_ctlreg(sc, ESO_CTLREG_LAIC,
1891 	    ESO_CTLREG_LAIC_PINENB | ESO_CTLREG_LAIC_EXTENB);
1892 	eso_write_ctlreg(sc, ESO_CTLREG_DRQCTL,
1893 	    ESO_CTLREG_DRQCTL_ENB1 | ESO_CTLREG_DRQCTL_EXTENB);
1894 
1895 	/* Set up and enable DMA controller. */
1896 	bus_space_write_1(sc->sc_dmac_iot, sc->sc_dmac_ioh, ESO_DMAC_CLEAR, 0);
1897 	bus_space_write_1(sc->sc_dmac_iot, sc->sc_dmac_ioh, ESO_DMAC_MASK,
1898 	    ESO_DMAC_MASK_MASK);
1899 	bus_space_write_1(sc->sc_dmac_iot, sc->sc_dmac_ioh, ESO_DMAC_MODE,
1900 	    DMA37MD_WRITE | DMA37MD_LOOP | DMA37MD_DEMAND);
1901 	bus_space_write_4(sc->sc_dmac_iot, sc->sc_dmac_ioh, ESO_DMAC_DMAA,
1902 	    DMAADDR(ed));
1903 	bus_space_write_2(sc->sc_dmac_iot, sc->sc_dmac_ioh, ESO_DMAC_DMAC,
1904 	    (uint8_t *)end - (uint8_t *)start - 1);
1905 	bus_space_write_1(sc->sc_dmac_iot, sc->sc_dmac_ioh, ESO_DMAC_MASK, 0);
1906 
1907 	/* Start DMA. */
1908 	eso_write_ctlreg(sc, ESO_CTLREG_A1C2,
1909 	    ESO_CTLREG_A1C2_DMAENB | ESO_CTLREG_A1C2_READ |
1910 	    ESO_CTLREG_A1C2_AUTO | ESO_CTLREG_A1C2_ADC);
1911 
1912 	return 0;
1913 }
1914 
1915 
1916 static void
1917 eso_get_locks(void *addr, kmutex_t **intr, kmutex_t **thread)
1918 {
1919 	struct eso_softc *sc;
1920 
1921 	sc = addr;
1922 	*intr = &sc->sc_intr_lock;
1923 	*thread = &sc->sc_lock;
1924 }
1925 
1926 /*
1927  * Mixer utility functions.
1928  */
1929 static int
1930 eso_set_recsrc(struct eso_softc *sc, unsigned int recsrc)
1931 {
1932 	mixer_devinfo_t di;
1933 	int i;
1934 
1935 	KASSERT(mutex_owned(&sc->sc_intr_lock));
1936 
1937 	di.index = ESO_RECORD_SOURCE;
1938 	if (eso_query_devinfo(sc, &di) != 0)
1939 		panic("eso_set_recsrc: eso_query_devinfo failed");
1940 
1941 	for (i = 0; i < di.un.e.num_mem; i++) {
1942 		if (recsrc == di.un.e.member[i].ord) {
1943 			eso_write_mixreg(sc, ESO_MIXREG_ERS, recsrc);
1944 			sc->sc_recsrc = recsrc;
1945 			return 0;
1946 		}
1947 	}
1948 
1949 	return EINVAL;
1950 }
1951 
1952 static int
1953 eso_set_monooutsrc(struct eso_softc *sc, unsigned int monooutsrc)
1954 {
1955 	mixer_devinfo_t di;
1956 	int i;
1957 	uint8_t mpm;
1958 
1959 	KASSERT(mutex_owned(&sc->sc_intr_lock));
1960 
1961 	di.index = ESO_MONOOUT_SOURCE;
1962 	if (eso_query_devinfo(sc, &di) != 0)
1963 		panic("eso_set_monooutsrc: eso_query_devinfo failed");
1964 
1965 	for (i = 0; i < di.un.e.num_mem; i++) {
1966 		if (monooutsrc == di.un.e.member[i].ord) {
1967 			mpm = eso_read_mixreg(sc, ESO_MIXREG_MPM);
1968 			mpm &= ~ESO_MIXREG_MPM_MOMASK;
1969 			mpm |= monooutsrc;
1970 			eso_write_mixreg(sc, ESO_MIXREG_MPM, mpm);
1971 			sc->sc_monooutsrc = monooutsrc;
1972 			return 0;
1973 		}
1974 	}
1975 
1976 	return EINVAL;
1977 }
1978 
1979 static int
1980 eso_set_monoinbypass(struct eso_softc *sc, unsigned int monoinbypass)
1981 {
1982 	mixer_devinfo_t di;
1983 	int i;
1984 	uint8_t mpm;
1985 
1986 	KASSERT(mutex_owned(&sc->sc_intr_lock));
1987 
1988 	di.index = ESO_MONOIN_BYPASS;
1989 	if (eso_query_devinfo(sc, &di) != 0)
1990 		panic("eso_set_monoinbypass: eso_query_devinfo failed");
1991 
1992 	for (i = 0; i < di.un.e.num_mem; i++) {
1993 		if (monoinbypass == di.un.e.member[i].ord) {
1994 			mpm = eso_read_mixreg(sc, ESO_MIXREG_MPM);
1995 			mpm &= ~(ESO_MIXREG_MPM_MOMASK | ESO_MIXREG_MPM_RESV0);
1996 			mpm |= (monoinbypass ? ESO_MIXREG_MPM_MIBYPASS : 0);
1997 			eso_write_mixreg(sc, ESO_MIXREG_MPM, mpm);
1998 			sc->sc_monoinbypass = monoinbypass;
1999 			return 0;
2000 		}
2001 	}
2002 
2003 	return EINVAL;
2004 }
2005 
2006 static int
2007 eso_set_preamp(struct eso_softc *sc, unsigned int preamp)
2008 {
2009 	mixer_devinfo_t di;
2010 	int i;
2011 	uint8_t mpm;
2012 
2013 	KASSERT(mutex_owned(&sc->sc_intr_lock));
2014 
2015 	di.index = ESO_MIC_PREAMP;
2016 	if (eso_query_devinfo(sc, &di) != 0)
2017 		panic("eso_set_preamp: eso_query_devinfo failed");
2018 
2019 	for (i = 0; i < di.un.e.num_mem; i++) {
2020 		if (preamp == di.un.e.member[i].ord) {
2021 			mpm = eso_read_mixreg(sc, ESO_MIXREG_MPM);
2022 			mpm &= ~(ESO_MIXREG_MPM_PREAMP | ESO_MIXREG_MPM_RESV0);
2023 			mpm |= (preamp ? ESO_MIXREG_MPM_PREAMP : 0);
2024 			eso_write_mixreg(sc, ESO_MIXREG_MPM, mpm);
2025 			sc->sc_preamp = preamp;
2026 			return 0;
2027 		}
2028 	}
2029 
2030 	return EINVAL;
2031 }
2032 
2033 /*
2034  * Reload Master Volume and Mute values in softc from mixer; used when
2035  * those have previously been invalidated by use of hardware volume controls.
2036  */
2037 static void
2038 eso_reload_master_vol(struct eso_softc *sc)
2039 {
2040 	uint8_t mv;
2041 
2042 	KASSERT(mutex_owned(&sc->sc_intr_lock));
2043 
2044 	mv = eso_read_mixreg(sc, ESO_MIXREG_LMVM);
2045 	sc->sc_gain[ESO_MASTER_VOL][ESO_LEFT] =
2046 	    (mv & ~ESO_MIXREG_LMVM_MUTE) << 2;
2047 	mv = eso_read_mixreg(sc, ESO_MIXREG_LMVM);
2048 	sc->sc_gain[ESO_MASTER_VOL][ESO_RIGHT] =
2049 	    (mv & ~ESO_MIXREG_RMVM_MUTE) << 2;
2050 	/* Currently both channels are muted simultaneously; either is OK. */
2051 	sc->sc_mvmute = (mv & ESO_MIXREG_RMVM_MUTE) != 0;
2052 }
2053 
2054 static void
2055 eso_set_gain(struct eso_softc *sc, unsigned int port)
2056 {
2057 	uint8_t mixreg, tmp;
2058 
2059 	KASSERT(mutex_owned(&sc->sc_intr_lock));
2060 
2061 	switch (port) {
2062 	case ESO_DAC_PLAY_VOL:
2063 		mixreg = ESO_MIXREG_PVR_A2;
2064 		break;
2065 	case ESO_MIC_PLAY_VOL:
2066 		mixreg = ESO_MIXREG_PVR_MIC;
2067 		break;
2068 	case ESO_LINE_PLAY_VOL:
2069 		mixreg = ESO_MIXREG_PVR_LINE;
2070 		break;
2071 	case ESO_SYNTH_PLAY_VOL:
2072 		mixreg = ESO_MIXREG_PVR_SYNTH;
2073 		break;
2074 	case ESO_CD_PLAY_VOL:
2075 		mixreg = ESO_MIXREG_PVR_CD;
2076 		break;
2077 	case ESO_AUXB_PLAY_VOL:
2078 		mixreg = ESO_MIXREG_PVR_AUXB;
2079 		break;
2080 
2081 	case ESO_DAC_REC_VOL:
2082 		mixreg = ESO_MIXREG_RVR_A2;
2083 		break;
2084 	case ESO_MIC_REC_VOL:
2085 		mixreg = ESO_MIXREG_RVR_MIC;
2086 		break;
2087 	case ESO_LINE_REC_VOL:
2088 		mixreg = ESO_MIXREG_RVR_LINE;
2089 		break;
2090 	case ESO_SYNTH_REC_VOL:
2091 		mixreg = ESO_MIXREG_RVR_SYNTH;
2092 		break;
2093 	case ESO_CD_REC_VOL:
2094 		mixreg = ESO_MIXREG_RVR_CD;
2095 		break;
2096 	case ESO_AUXB_REC_VOL:
2097 		mixreg = ESO_MIXREG_RVR_AUXB;
2098 		break;
2099 	case ESO_MONO_PLAY_VOL:
2100 		mixreg = ESO_MIXREG_PVR_MONO;
2101 		break;
2102 	case ESO_MONO_REC_VOL:
2103 		mixreg = ESO_MIXREG_RVR_MONO;
2104 		break;
2105 
2106 	case ESO_PCSPEAKER_VOL:
2107 		/* Special case - only 3-bit, mono, and reserved bits. */
2108 		tmp = eso_read_mixreg(sc, ESO_MIXREG_PCSVR);
2109 		tmp &= ESO_MIXREG_PCSVR_RESV;
2110 		/* Map bits 7:5 -> 2:0. */
2111 		tmp |= (sc->sc_gain[port][ESO_LEFT] >> 5);
2112 		eso_write_mixreg(sc, ESO_MIXREG_PCSVR, tmp);
2113 		return;
2114 
2115 	case ESO_MASTER_VOL:
2116 		/* Special case - separate regs, and 6-bit precision. */
2117 		/* Map bits 7:2 -> 5:0, reflect mute settings. */
2118 		eso_write_mixreg(sc, ESO_MIXREG_LMVM,
2119 		    (sc->sc_gain[port][ESO_LEFT] >> 2) |
2120 		    (sc->sc_mvmute ? ESO_MIXREG_LMVM_MUTE : 0x00));
2121 		eso_write_mixreg(sc, ESO_MIXREG_RMVM,
2122 		    (sc->sc_gain[port][ESO_RIGHT] >> 2) |
2123 		    (sc->sc_mvmute ? ESO_MIXREG_RMVM_MUTE : 0x00));
2124 		return;
2125 
2126 	case ESO_SPATIALIZER:
2127 		/* Special case - only `mono', and higher precision. */
2128 		eso_write_mixreg(sc, ESO_MIXREG_SPATLVL,
2129 		    sc->sc_gain[port][ESO_LEFT]);
2130 		return;
2131 
2132 	case ESO_RECORD_VOL:
2133 		/* Very Special case, controller register. */
2134 		eso_write_ctlreg(sc, ESO_CTLREG_RECLVL,ESO_4BIT_GAIN_TO_STEREO(
2135 		   sc->sc_gain[port][ESO_LEFT], sc->sc_gain[port][ESO_RIGHT]));
2136 		return;
2137 
2138 	default:
2139 #ifdef DIAGNOSTIC
2140 		panic("eso_set_gain: bad port %u", port);
2141 		/* NOTREACHED */
2142 #else
2143 		return;
2144 #endif
2145 	}
2146 
2147 	eso_write_mixreg(sc, mixreg, ESO_4BIT_GAIN_TO_STEREO(
2148 	    sc->sc_gain[port][ESO_LEFT], sc->sc_gain[port][ESO_RIGHT]));
2149 }
2150