xref: /freebsd/sys/dev/sound/pci/maestro3.c (revision 0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2001 Scott Long <scottl@freebsd.org>
5  * Copyright (c) 2001 Darrell Anderson <anderson@cs.duke.edu>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 /*
31  * Maestro-3/Allegro FreeBSD pcm sound driver
32  *
33  * executive status summary:
34  * (+) /dev/dsp multiple concurrent play channels.
35  * (+) /dev/dsp config (speed, mono/stereo, 8/16 bit).
36  * (+) /dev/mixer sets left/right volumes.
37  * (+) /dev/dsp recording works.  Tested successfully with the cdrom channel
38  * (+) apm suspend/resume works, and works properly!.
39  * (-) hardware volme controls don't work =-(
40  * (-) setblocksize() does nothing.
41  *
42  * The real credit goes to:
43  *
44  * Zach Brown for his Linux driver core and helpful technical comments.
45  * <zab@zabbo.net>, http://www.zabbo.net/maestro3
46  *
47  * Cameron Grant created the pcm framework used here nearly verbatim.
48  * <cg@freebsd.org>, https://people.freebsd.org/~cg/template.c
49  *
50  * Taku YAMAMOTO for his Maestro-1/2 FreeBSD driver and sanity reference.
51  * <taku@cent.saitama-u.ac.jp>
52  *
53  * ESS docs explained a few magic registers and numbers.
54  * http://virgo.caltech.edu/~dmoore/maestro3.pdf.gz
55  */
56 
57 #ifdef HAVE_KERNEL_OPTION_HEADERS
58 #include "opt_snd.h"
59 #endif
60 
61 #include <dev/sound/pcm/sound.h>
62 #include <dev/sound/pcm/ac97.h>
63 
64 #include <dev/pci/pcireg.h>
65 #include <dev/pci/pcivar.h>
66 
67 #define M3_MODEL 1
68 
69 #include <dev/sound/pci/allegro_reg.h>
70 #include <dev/sound/pci/allegro_code.h>
71 
72 /* -------------------------------------------------------------------- */
73 
74 enum {CHANGE=0, CALL=1, INTR=2, BORING=3, NONE=-1};
75 #ifndef M3_DEBUG_LEVEL
76 #define M3_DEBUG_LEVEL NONE
77 #endif
78 #define M3_DEBUG(level, _msg) {if ((level) <= M3_DEBUG_LEVEL) {printf _msg;}}
79 
80 /* -------------------------------------------------------------------- */
81 enum {
82 	ESS_ALLEGRO_1,
83 	ESS_MAESTRO3
84 };
85 
86 static struct m3_card_type {
87 	u_int32_t pci_id; int which; int delay1; int delay2; char *name;
88 } m3_card_types[] = {
89 	{ 0x1988125d, ESS_ALLEGRO_1, 50, 800, "ESS Technology Allegro-1" },
90 	{ 0x1998125d, ESS_MAESTRO3, 20, 500, "ESS Technology Maestro3" },
91 	{ 0x199a125d, ESS_MAESTRO3, 20, 500, "ESS Technology Maestro3" },
92 	{ 0, 0, 0, 0, NULL }
93 };
94 
95 #define M3_BUFSIZE_MIN	4096
96 #define M3_BUFSIZE_MAX	65536
97 #define M3_BUFSIZE_DEFAULT 4096
98 #define M3_PCHANS 4 /* create /dev/dsp0.[0-N] to use more than one */
99 #define M3_RCHANS 1
100 #define M3_MAXADDR ((1 << 27) - 1)
101 #define M3_DEFAULT_VOL 0x6800
102 
103 struct sc_info;
104 
105 struct sc_pchinfo {
106 	u_int32_t	spd;
107 	u_int32_t	fmt;
108 	struct snd_dbuf	*buffer;
109 	struct pcm_channel	*channel;
110 	struct sc_info	*parent;
111 	u_int32_t	bufsize;
112 	u_int32_t	dac_data;
113 	u_int32_t	dac_idx;
114 	u_int32_t	active;
115 	u_int32_t	ptr;
116 	u_int32_t	prevptr;
117 };
118 
119 struct sc_rchinfo {
120 	u_int32_t	spd;
121 	u_int32_t	fmt;
122 	struct snd_dbuf	*buffer;
123 	struct pcm_channel	*channel;
124 	struct sc_info	*parent;
125 	u_int32_t	bufsize;
126 	u_int32_t	adc_data;
127 	u_int32_t	adc_idx;
128 	u_int32_t	active;
129 	u_int32_t	ptr;
130 	u_int32_t	prevptr;
131 };
132 
133 struct sc_info {
134 	device_t		dev;
135 	u_int32_t		type;
136 	int			which;
137 	int			delay1;
138 	int			delay2;
139 
140 	bus_space_tag_t		st;
141 	bus_space_handle_t	 sh;
142 	bus_dma_tag_t		parent_dmat;
143 
144 	struct resource		*reg;
145 	struct resource		*irq;
146 	int			regtype;
147 	int			regid;
148 	int			irqid;
149 	void			*ih;
150 
151 	struct sc_pchinfo	pch[M3_PCHANS];
152 	struct sc_rchinfo	rch[M3_RCHANS];
153 	int			pch_cnt;
154 	int			rch_cnt;
155 	int			pch_active_cnt;
156 	unsigned int		bufsz;
157 	u_int16_t		*savemem;
158 
159 	struct mtx		*sc_lock;
160 };
161 
162 #define M3_LOCK(_sc)		snd_mtxlock((_sc)->sc_lock)
163 #define M3_UNLOCK(_sc)		snd_mtxunlock((_sc)->sc_lock)
164 #define M3_LOCK_ASSERT(_sc)	snd_mtxassert((_sc)->sc_lock)
165 
166 /* -------------------------------------------------------------------- */
167 
168 /* play channel interface */
169 static void *m3_pchan_init(kobj_t, void *, struct snd_dbuf *, struct pcm_channel *, int);
170 static int m3_pchan_free(kobj_t, void *);
171 static int m3_pchan_setformat(kobj_t, void *, u_int32_t);
172 static u_int32_t m3_pchan_setspeed(kobj_t, void *, u_int32_t);
173 static u_int32_t m3_pchan_setblocksize(kobj_t, void *, u_int32_t);
174 static int m3_pchan_trigger(kobj_t, void *, int);
175 static int m3_pchan_trigger_locked(kobj_t, void *, int);
176 static u_int32_t m3_pchan_getptr_internal(struct sc_pchinfo *);
177 static u_int32_t m3_pchan_getptr(kobj_t, void *);
178 static struct pcmchan_caps *m3_pchan_getcaps(kobj_t, void *);
179 
180 /* record channel interface */
181 static void *m3_rchan_init(kobj_t, void *, struct snd_dbuf *, struct pcm_channel *, int);
182 static int m3_rchan_free(kobj_t, void *);
183 static int m3_rchan_setformat(kobj_t, void *, u_int32_t);
184 static u_int32_t m3_rchan_setspeed(kobj_t, void *, u_int32_t);
185 static u_int32_t m3_rchan_setblocksize(kobj_t, void *, u_int32_t);
186 static int m3_rchan_trigger(kobj_t, void *, int);
187 static int m3_rchan_trigger_locked(kobj_t, void *, int);
188 static u_int32_t m3_rchan_getptr_internal(struct sc_rchinfo *);
189 static u_int32_t m3_rchan_getptr(kobj_t, void *);
190 static struct pcmchan_caps *m3_rchan_getcaps(kobj_t, void *);
191 
192 static int m3_chan_active(struct sc_info *);
193 
194 /* talk to the codec - called from ac97.c */
195 static u_int32_t m3_initcd(kobj_t, void *);
196 static int	 m3_rdcd(kobj_t, void *, int);
197 static int  	 m3_wrcd(kobj_t, void *, int, u_int32_t);
198 
199 /* stuff */
200 static void      m3_intr(void *);
201 static int       m3_power(struct sc_info *, int);
202 static int       m3_init(struct sc_info *);
203 static int       m3_uninit(struct sc_info *);
204 static u_int8_t	 m3_assp_halt(struct sc_info *);
205 static void	 m3_config(struct sc_info *);
206 static void	 m3_amp_enable(struct sc_info *);
207 static void	 m3_enable_ints(struct sc_info *);
208 static void	 m3_codec_reset(struct sc_info *);
209 
210 /* -------------------------------------------------------------------- */
211 /* Codec descriptor */
212 static kobj_method_t m3_codec_methods[] = {
213 	KOBJMETHOD(ac97_init,	m3_initcd),
214 	KOBJMETHOD(ac97_read,	m3_rdcd),
215 	KOBJMETHOD(ac97_write,	m3_wrcd),
216 	KOBJMETHOD_END
217 };
218 AC97_DECLARE(m3_codec);
219 
220 /* -------------------------------------------------------------------- */
221 /* channel descriptors */
222 
223 static u_int32_t m3_playfmt[] = {
224 	SND_FORMAT(AFMT_U8, 1, 0),
225 	SND_FORMAT(AFMT_U8, 2, 0),
226 	SND_FORMAT(AFMT_S16_LE, 1, 0),
227 	SND_FORMAT(AFMT_S16_LE, 2, 0),
228 	0
229 };
230 static struct pcmchan_caps m3_playcaps = {8000, 48000, m3_playfmt, 0};
231 
232 static kobj_method_t m3_pch_methods[] = {
233 	KOBJMETHOD(channel_init,		m3_pchan_init),
234 	KOBJMETHOD(channel_setformat,		m3_pchan_setformat),
235 	KOBJMETHOD(channel_setspeed,		m3_pchan_setspeed),
236 	KOBJMETHOD(channel_setblocksize,	m3_pchan_setblocksize),
237 	KOBJMETHOD(channel_trigger,		m3_pchan_trigger),
238 	KOBJMETHOD(channel_getptr,		m3_pchan_getptr),
239 	KOBJMETHOD(channel_getcaps,		m3_pchan_getcaps),
240 	KOBJMETHOD(channel_free,		m3_pchan_free),
241 	KOBJMETHOD_END
242 };
243 CHANNEL_DECLARE(m3_pch);
244 
245 static u_int32_t m3_recfmt[] = {
246 	SND_FORMAT(AFMT_U8, 1, 0),
247 	SND_FORMAT(AFMT_U8, 2, 0),
248 	SND_FORMAT(AFMT_S16_LE, 1, 0),
249 	SND_FORMAT(AFMT_S16_LE, 2, 0),
250 	0
251 };
252 static struct pcmchan_caps m3_reccaps = {8000, 48000, m3_recfmt, 0};
253 
254 static kobj_method_t m3_rch_methods[] = {
255 	KOBJMETHOD(channel_init,		m3_rchan_init),
256 	KOBJMETHOD(channel_setformat,		m3_rchan_setformat),
257 	KOBJMETHOD(channel_setspeed,		m3_rchan_setspeed),
258 	KOBJMETHOD(channel_setblocksize,	m3_rchan_setblocksize),
259 	KOBJMETHOD(channel_trigger,		m3_rchan_trigger),
260 	KOBJMETHOD(channel_getptr,		m3_rchan_getptr),
261 	KOBJMETHOD(channel_getcaps,		m3_rchan_getcaps),
262 	KOBJMETHOD(channel_free,		m3_rchan_free),
263 	KOBJMETHOD_END
264 };
265 CHANNEL_DECLARE(m3_rch);
266 
267 /* -------------------------------------------------------------------- */
268 /* some i/o convenience functions */
269 
270 #define m3_rd_1(sc, regno) bus_space_read_1(sc->st, sc->sh, regno)
271 #define m3_rd_2(sc, regno) bus_space_read_2(sc->st, sc->sh, regno)
272 #define m3_rd_4(sc, regno) bus_space_read_4(sc->st, sc->sh, regno)
273 #define m3_wr_1(sc, regno, data) bus_space_write_1(sc->st, sc->sh, regno, data)
274 #define m3_wr_2(sc, regno, data) bus_space_write_2(sc->st, sc->sh, regno, data)
275 #define m3_wr_4(sc, regno, data) bus_space_write_4(sc->st, sc->sh, regno, data)
276 #define m3_rd_assp_code(sc, index) \
277         m3_rd_assp(sc, MEMTYPE_INTERNAL_CODE, index)
278 #define m3_wr_assp_code(sc, index, data) \
279         m3_wr_assp(sc, MEMTYPE_INTERNAL_CODE, index, data)
280 #define m3_rd_assp_data(sc, index) \
281         m3_rd_assp(sc, MEMTYPE_INTERNAL_DATA, index)
282 #define m3_wr_assp_data(sc, index, data) \
283         m3_wr_assp(sc, MEMTYPE_INTERNAL_DATA, index, data)
284 
285 static __inline u_int16_t
286 m3_rd_assp(struct sc_info *sc, u_int16_t region, u_int16_t index)
287 {
288         m3_wr_2(sc, DSP_PORT_MEMORY_TYPE, region & MEMTYPE_MASK);
289         m3_wr_2(sc, DSP_PORT_MEMORY_INDEX, index);
290         return m3_rd_2(sc, DSP_PORT_MEMORY_DATA);
291 }
292 
293 static __inline void
294 m3_wr_assp(struct sc_info *sc, u_int16_t region, u_int16_t index,
295 	   u_int16_t data)
296 {
297         m3_wr_2(sc, DSP_PORT_MEMORY_TYPE, region & MEMTYPE_MASK);
298         m3_wr_2(sc, DSP_PORT_MEMORY_INDEX, index);
299         m3_wr_2(sc, DSP_PORT_MEMORY_DATA, data);
300 }
301 
302 static __inline int
303 m3_wait(struct sc_info *sc)
304 {
305 	int i;
306 
307 	for (i=0 ; i<20 ; i++) {
308 		if ((m3_rd_1(sc, CODEC_STATUS) & 1) == 0) {
309 			return 0;
310 		}
311 		DELAY(2);
312 	}
313 	return -1;
314 }
315 
316 /* -------------------------------------------------------------------- */
317 /* ac97 codec */
318 
319 static u_int32_t
320 m3_initcd(kobj_t kobj, void *devinfo)
321 {
322 	struct sc_info *sc = (struct sc_info *)devinfo;
323 	u_int32_t data;
324 
325 	M3_DEBUG(CALL, ("m3_initcd\n"));
326 
327 	/* init ac-link */
328 
329 	data = m3_rd_1(sc, CODEC_COMMAND);
330 	return ((data & 0x1) ? 0 : 1);
331 }
332 
333 static int
334 m3_rdcd(kobj_t kobj, void *devinfo, int regno)
335 {
336 	struct sc_info *sc = (struct sc_info *)devinfo;
337 	u_int32_t data;
338 
339 	if (m3_wait(sc)) {
340 		device_printf(sc->dev, "m3_rdcd timed out.\n");
341 		return -1;
342 	}
343 	m3_wr_1(sc, CODEC_COMMAND, (regno & 0x7f) | 0x80);
344 	DELAY(50); /* ac97 cycle = 20.8 usec */
345 	if (m3_wait(sc)) {
346 		device_printf(sc->dev, "m3_rdcd timed out.\n");
347 		return -1;
348 	}
349 	data = m3_rd_2(sc, CODEC_DATA);
350 	return data;
351 }
352 
353 static int
354 m3_wrcd(kobj_t kobj, void *devinfo, int regno, u_int32_t data)
355 {
356 	struct sc_info *sc = (struct sc_info *)devinfo;
357 	if (m3_wait(sc)) {
358 		device_printf(sc->dev, "m3_wrcd timed out.\n");
359 		return -1;
360 	}
361 	m3_wr_2(sc, CODEC_DATA, data);
362 	m3_wr_1(sc, CODEC_COMMAND, regno & 0x7f);
363 	DELAY(50); /* ac97 cycle = 20.8 usec */
364 	return 0;
365 }
366 
367 /* -------------------------------------------------------------------- */
368 /* play channel interface */
369 
370 #define LO(x) (((x) & 0x0000ffff)      )
371 #define HI(x) (((x) & 0xffff0000) >> 16)
372 
373 static void *
374 m3_pchan_init(kobj_t kobj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
375 {
376 	struct sc_info *sc = devinfo;
377 	struct sc_pchinfo *ch;
378 	u_int32_t bus_addr, i;
379 	int idx, data_bytes, dac_data;
380 	int dsp_in_size, dsp_out_size, dsp_in_buf, dsp_out_buf;
381 
382 	struct data_word {
383 	    u_int16_t addr, val;
384 	} pv[] = {
385 	    {CDATA_LEFT_VOLUME, M3_DEFAULT_VOL},
386 	    {CDATA_RIGHT_VOLUME, M3_DEFAULT_VOL},
387 	    {SRC3_DIRECTION_OFFSET, 0} ,
388 	    {SRC3_DIRECTION_OFFSET + 3, 0x0000},
389 	    {SRC3_DIRECTION_OFFSET + 4, 0},
390 	    {SRC3_DIRECTION_OFFSET + 5, 0},
391 	    {SRC3_DIRECTION_OFFSET + 6, 0},
392 	    {SRC3_DIRECTION_OFFSET + 7, 0},
393 	    {SRC3_DIRECTION_OFFSET + 8, 0},
394 	    {SRC3_DIRECTION_OFFSET + 9, 0},
395 	    {SRC3_DIRECTION_OFFSET + 10, 0x8000},
396 	    {SRC3_DIRECTION_OFFSET + 11, 0xFF00},
397 	    {SRC3_DIRECTION_OFFSET + 13, 0},
398 	    {SRC3_DIRECTION_OFFSET + 14, 0},
399 	    {SRC3_DIRECTION_OFFSET + 15, 0},
400 	    {SRC3_DIRECTION_OFFSET + 16, 8},
401 	    {SRC3_DIRECTION_OFFSET + 17, 50*2},
402 	    {SRC3_DIRECTION_OFFSET + 18, MINISRC_BIQUAD_STAGE - 1},
403 	    {SRC3_DIRECTION_OFFSET + 20, 0},
404 	    {SRC3_DIRECTION_OFFSET + 21, 0}
405 	};
406 
407 	M3_LOCK(sc);
408 	idx = sc->pch_cnt; /* dac instance number, no active reuse! */
409         M3_DEBUG(CHANGE, ("m3_pchan_init(dac=%d)\n", idx));
410 
411 	if (dir != PCMDIR_PLAY) {
412 		M3_UNLOCK(sc);
413 		device_printf(sc->dev, "m3_pchan_init not PCMDIR_PLAY\n");
414 		return (NULL);
415 	}
416 
417 	data_bytes = (((MINISRC_TMP_BUFFER_SIZE & ~1) +
418 			   (MINISRC_IN_BUFFER_SIZE & ~1) +
419 			   (MINISRC_OUT_BUFFER_SIZE & ~1) + 4) + 255) &~ 255;
420 	dac_data = 0x1100 + (data_bytes * idx);
421 
422 	dsp_in_size = MINISRC_IN_BUFFER_SIZE - (0x20 * 2);
423 	dsp_out_size = MINISRC_OUT_BUFFER_SIZE - (0x20 * 2);
424 	dsp_in_buf = dac_data + (MINISRC_TMP_BUFFER_SIZE/2);
425 	dsp_out_buf = dsp_in_buf + (dsp_in_size/2) + 1;
426 
427 	ch = &sc->pch[idx];
428 	ch->dac_idx = idx;
429 	ch->dac_data = dac_data;
430 	if (ch->dac_data + data_bytes/2 >= 0x1c00) {
431 		M3_UNLOCK(sc);
432 		device_printf(sc->dev, "m3_pchan_init: revb mem exhausted\n");
433 		return (NULL);
434 	}
435 
436 	ch->buffer = b;
437 	ch->parent = sc;
438 	ch->channel = c;
439 	ch->fmt = SND_FORMAT(AFMT_U8, 1, 0);
440 	ch->spd = DSP_DEFAULT_SPEED;
441 	M3_UNLOCK(sc); /* XXX */
442 	if (sndbuf_alloc(ch->buffer, sc->parent_dmat, 0, sc->bufsz) != 0) {
443 		device_printf(sc->dev, "m3_pchan_init chn_allocbuf failed\n");
444 		return (NULL);
445 	}
446 	M3_LOCK(sc);
447 	ch->bufsize = sndbuf_getsize(ch->buffer);
448 
449 	/* host dma buffer pointers */
450 	bus_addr = sndbuf_getbufaddr(ch->buffer);
451 	if (bus_addr & 3) {
452 		device_printf(sc->dev, "m3_pchan_init unaligned bus_addr\n");
453 		bus_addr = (bus_addr + 4) & ~3;
454 	}
455 	m3_wr_assp_data(sc, ch->dac_data + CDATA_HOST_SRC_ADDRL, LO(bus_addr));
456 	m3_wr_assp_data(sc, ch->dac_data + CDATA_HOST_SRC_ADDRH, HI(bus_addr));
457 	m3_wr_assp_data(sc, ch->dac_data + CDATA_HOST_SRC_END_PLUS_1L,
458 			LO(bus_addr + ch->bufsize));
459 	m3_wr_assp_data(sc, ch->dac_data + CDATA_HOST_SRC_END_PLUS_1H,
460 			HI(bus_addr + ch->bufsize));
461 	m3_wr_assp_data(sc, ch->dac_data + CDATA_HOST_SRC_CURRENTL,
462 			LO(bus_addr));
463 	m3_wr_assp_data(sc, ch->dac_data + CDATA_HOST_SRC_CURRENTH,
464 			HI(bus_addr));
465 
466 	/* dsp buffers */
467 	m3_wr_assp_data(sc, ch->dac_data + CDATA_IN_BUF_BEGIN, dsp_in_buf);
468 	m3_wr_assp_data(sc, ch->dac_data + CDATA_IN_BUF_END_PLUS_1,
469 			dsp_in_buf + dsp_in_size/2);
470 	m3_wr_assp_data(sc, ch->dac_data + CDATA_IN_BUF_HEAD, dsp_in_buf);
471 	m3_wr_assp_data(sc, ch->dac_data + CDATA_IN_BUF_TAIL, dsp_in_buf);
472 	m3_wr_assp_data(sc, ch->dac_data + CDATA_OUT_BUF_BEGIN, dsp_out_buf);
473 	m3_wr_assp_data(sc, ch->dac_data + CDATA_OUT_BUF_END_PLUS_1,
474 			dsp_out_buf + dsp_out_size/2);
475 	m3_wr_assp_data(sc, ch->dac_data + CDATA_OUT_BUF_HEAD, dsp_out_buf);
476 	m3_wr_assp_data(sc, ch->dac_data + CDATA_OUT_BUF_TAIL, dsp_out_buf);
477 
478 	/* some per client initializers */
479 	m3_wr_assp_data(sc, ch->dac_data + SRC3_DIRECTION_OFFSET + 12,
480 			ch->dac_data + 40 + 8);
481 	m3_wr_assp_data(sc, ch->dac_data + SRC3_DIRECTION_OFFSET + 19,
482 			0x400 + MINISRC_COEF_LOC);
483 	/* enable or disable low pass filter? (0xff if rate> 45000) */
484 	m3_wr_assp_data(sc, ch->dac_data + SRC3_DIRECTION_OFFSET + 22, 0);
485 	/* tell it which way dma is going? */
486 	m3_wr_assp_data(sc, ch->dac_data + CDATA_DMA_CONTROL,
487 			DMACONTROL_AUTOREPEAT + DMAC_PAGE3_SELECTOR +
488 			DMAC_BLOCKF_SELECTOR);
489 
490 	/* set an armload of static initializers */
491 	for(i = 0 ; i < nitems(pv); i++) {
492 		m3_wr_assp_data(sc, ch->dac_data + pv[i].addr, pv[i].val);
493 	}
494 
495 	/* put us in the packed task lists */
496 	m3_wr_assp_data(sc, KDATA_INSTANCE0_MINISRC +
497 			(sc->pch_cnt + sc->rch_cnt),
498 			ch->dac_data >> DP_SHIFT_COUNT);
499 	m3_wr_assp_data(sc, KDATA_DMA_XFER0 + (sc->pch_cnt + sc->rch_cnt),
500 			ch->dac_data >> DP_SHIFT_COUNT);
501 	m3_wr_assp_data(sc, KDATA_MIXER_XFER0 + sc->pch_cnt,
502 			ch->dac_data >> DP_SHIFT_COUNT);
503 
504 	/* gotta start before stop */
505 	m3_pchan_trigger_locked(NULL, ch, PCMTRIG_START);
506 	/* silence noise on load */
507 	m3_pchan_trigger_locked(NULL, ch, PCMTRIG_STOP);
508 
509 	sc->pch_cnt++;
510 	M3_UNLOCK(sc);
511 
512 	return (ch);
513 }
514 
515 static int
516 m3_pchan_free(kobj_t kobj, void *chdata)
517 {
518 	struct sc_pchinfo *ch = chdata;
519 	struct sc_info *sc = ch->parent;
520 
521 	M3_LOCK(sc);
522         M3_DEBUG(CHANGE, ("m3_pchan_free(dac=%d)\n", ch->dac_idx));
523 
524 	/*
525 	 * should remove this exact instance from the packed lists, but all
526 	 * are released at once (and in a stopped state) so this is ok.
527 	 */
528 	m3_wr_assp_data(sc, KDATA_INSTANCE0_MINISRC +
529 			(sc->pch_cnt - 1) + sc->rch_cnt, 0);
530 	m3_wr_assp_data(sc, KDATA_DMA_XFER0 +
531 			(sc->pch_cnt - 1) + sc->rch_cnt, 0);
532 	m3_wr_assp_data(sc, KDATA_MIXER_XFER0 + (sc->pch_cnt-1), 0);
533 	sc->pch_cnt--;
534 	M3_UNLOCK(sc);
535 
536 	return (0);
537 }
538 
539 static int
540 m3_pchan_setformat(kobj_t kobj, void *chdata, u_int32_t format)
541 {
542 	struct sc_pchinfo *ch = chdata;
543 	struct sc_info *sc = ch->parent;
544 	u_int32_t data;
545 
546 	M3_LOCK(sc);
547 	M3_DEBUG(CHANGE,
548 		 ("m3_pchan_setformat(dac=%d, format=0x%x{%s-%s})\n",
549 		  ch->dac_idx, format,
550 		  format & (AFMT_U8|AFMT_S8) ? "8bit":"16bit",
551 		  (AFMT_CHANNEL(format) > 1) ? "STEREO":"MONO"));
552 
553 	/* mono word */
554         data = (AFMT_CHANNEL(format) > 1)? 0 : 1;
555         m3_wr_assp_data(sc, ch->dac_data + SRC3_MODE_OFFSET, data);
556 
557         /* 8bit word */
558         data = ((format & AFMT_U8) || (format & AFMT_S8)) ? 1 : 0;
559         m3_wr_assp_data(sc, ch->dac_data + SRC3_WORD_LENGTH_OFFSET, data);
560 
561         ch->fmt = format;
562 	M3_UNLOCK(sc);
563 
564         return (0);
565 }
566 
567 static u_int32_t
568 m3_pchan_setspeed(kobj_t kobj, void *chdata, u_int32_t speed)
569 {
570 	struct sc_pchinfo *ch = chdata;
571 	struct sc_info *sc = ch->parent;
572 	u_int32_t freq;
573 
574 	M3_LOCK(sc);
575 	M3_DEBUG(CHANGE, ("m3_pchan_setspeed(dac=%d, speed=%d)\n",
576 			  ch->dac_idx, speed));
577 
578         if ((freq = ((speed << 15) + 24000) / 48000) != 0) {
579                 freq--;
580         }
581 
582         m3_wr_assp_data(sc, ch->dac_data + CDATA_FREQUENCY, freq);
583 	ch->spd = speed;
584 	M3_UNLOCK(sc);
585 
586 	/* return closest possible speed */
587 	return (speed);
588 }
589 
590 static u_int32_t
591 m3_pchan_setblocksize(kobj_t kobj, void *chdata, u_int32_t blocksize)
592 {
593 	struct sc_pchinfo *ch = chdata;
594 
595 	M3_DEBUG(CHANGE, ("m3_pchan_setblocksize(dac=%d, blocksize=%d)\n",
596 			  ch->dac_idx, blocksize));
597 
598 	return (sndbuf_getblksz(ch->buffer));
599 }
600 
601 static int
602 m3_pchan_trigger(kobj_t kobj, void *chdata, int go)
603 {
604 	struct sc_pchinfo *ch = chdata;
605 	struct sc_info *sc = ch->parent;
606 	int ret;
607 
608 	if (!PCMTRIG_COMMON(go))
609 		return (0);
610 
611 	M3_LOCK(sc);
612 	ret = m3_pchan_trigger_locked(kobj, chdata, go);
613 	M3_UNLOCK(sc);
614 
615 	return (ret);
616 }
617 
618 static int
619 m3_chan_active(struct sc_info *sc)
620 {
621 	int i, ret;
622 
623 	ret = 0;
624 
625 	for (i = 0; i < sc->pch_cnt; i++)
626 		ret += sc->pch[i].active;
627 
628 	for (i = 0; i < sc->rch_cnt; i++)
629 		ret += sc->rch[i].active;
630 
631 	return (ret);
632 }
633 
634 static int
635 m3_pchan_trigger_locked(kobj_t kobj, void *chdata, int go)
636 {
637 	struct sc_pchinfo *ch = chdata;
638 	struct sc_info *sc = ch->parent;
639 	u_int32_t data;
640 
641 	M3_LOCK_ASSERT(sc);
642 	M3_DEBUG(go == PCMTRIG_START ? CHANGE :
643 		 go == PCMTRIG_STOP ? CHANGE :
644 		 go == PCMTRIG_ABORT ? CHANGE :
645 		 CALL,
646 		 ("m3_pchan_trigger(dac=%d, go=0x%x{%s})\n", ch->dac_idx, go,
647 		  go == PCMTRIG_START ? "PCMTRIG_START" :
648 		  go == PCMTRIG_STOP ? "PCMTRIG_STOP" :
649 		  go == PCMTRIG_ABORT ? "PCMTRIG_ABORT" : "ignore"));
650 
651 	switch(go) {
652 	case PCMTRIG_START:
653 		if (ch->active) {
654 			return 0;
655 		}
656 		ch->active = 1;
657 		ch->ptr = 0;
658 		ch->prevptr = 0;
659 		sc->pch_active_cnt++;
660 
661 		/*[[inc_timer_users]]*/
662 		if (m3_chan_active(sc) == 1) {
663 	                m3_wr_assp_data(sc, KDATA_TIMER_COUNT_RELOAD, 240);
664         	        m3_wr_assp_data(sc, KDATA_TIMER_COUNT_CURRENT, 240);
665 	                data = m3_rd_2(sc, HOST_INT_CTRL);
666         	        m3_wr_2(sc, HOST_INT_CTRL, data | CLKRUN_GEN_ENABLE);
667 		}
668 
669                 m3_wr_assp_data(sc, ch->dac_data + CDATA_INSTANCE_READY, 1);
670                 m3_wr_assp_data(sc, KDATA_MIXER_TASK_NUMBER,
671 				sc->pch_active_cnt);
672 		break;
673 
674 	case PCMTRIG_STOP:
675 	case PCMTRIG_ABORT:
676 		if (ch->active == 0) {
677 			return 0;
678 		}
679 		ch->active = 0;
680 		sc->pch_active_cnt--;
681 
682 		/* XXX should the channel be drained? */
683 		/*[[dec_timer_users]]*/
684 		if (m3_chan_active(sc) == 0) {
685 	                m3_wr_assp_data(sc, KDATA_TIMER_COUNT_RELOAD, 0);
686         	        m3_wr_assp_data(sc, KDATA_TIMER_COUNT_CURRENT, 0);
687                 	data = m3_rd_2(sc, HOST_INT_CTRL);
688 	                m3_wr_2(sc, HOST_INT_CTRL, data & ~CLKRUN_GEN_ENABLE);
689 		}
690 
691                 m3_wr_assp_data(sc, ch->dac_data + CDATA_INSTANCE_READY, 0);
692                 m3_wr_assp_data(sc, KDATA_MIXER_TASK_NUMBER,
693 				sc->pch_active_cnt);
694 		break;
695 
696 	case PCMTRIG_EMLDMAWR:
697 		/* got play irq, transfer next buffer - ignore if using dma */
698 	case PCMTRIG_EMLDMARD:
699 		/* got rec irq, transfer next buffer - ignore if using dma */
700 	default:
701 		break;
702 	}
703 	return 0;
704 }
705 
706 static u_int32_t
707 m3_pchan_getptr_internal(struct sc_pchinfo *ch)
708 {
709 	struct sc_info *sc = ch->parent;
710 	u_int32_t hi, lo, bus_base, bus_crnt;
711 
712 	bus_base = sndbuf_getbufaddr(ch->buffer);
713 	hi = m3_rd_assp_data(sc, ch->dac_data + CDATA_HOST_SRC_CURRENTH);
714         lo = m3_rd_assp_data(sc, ch->dac_data + CDATA_HOST_SRC_CURRENTL);
715         bus_crnt = lo | (hi << 16);
716 
717 	M3_DEBUG(CALL, ("m3_pchan_getptr(dac=%d) result=%d\n",
718 			ch->dac_idx, bus_crnt - bus_base));
719 
720 	return (bus_crnt - bus_base); /* current byte offset of channel */
721 }
722 
723 static u_int32_t
724 m3_pchan_getptr(kobj_t kobj, void *chdata)
725 {
726 	struct sc_pchinfo *ch = chdata;
727 	struct sc_info *sc = ch->parent;
728 	u_int32_t ptr;
729 
730 	M3_LOCK(sc);
731 	ptr = ch->ptr;
732 	M3_UNLOCK(sc);
733 
734 	return (ptr);
735 }
736 
737 static struct pcmchan_caps *
738 m3_pchan_getcaps(kobj_t kobj, void *chdata)
739 {
740 	struct sc_pchinfo *ch = chdata;
741 
742         M3_DEBUG(CALL, ("m3_pchan_getcaps(dac=%d)\n", ch->dac_idx));
743 
744 	return &m3_playcaps;
745 }
746 
747 /* -------------------------------------------------------------------- */
748 /* rec channel interface */
749 
750 static void *
751 m3_rchan_init(kobj_t kobj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
752 {
753 	struct sc_info *sc = devinfo;
754 	struct sc_rchinfo *ch;
755 	u_int32_t bus_addr, i;
756 
757 	int idx, data_bytes, adc_data;
758 	int dsp_in_size, dsp_out_size, dsp_in_buf, dsp_out_buf;
759 
760 	struct data_word {
761 	u_int16_t addr, val;
762 	} rv[] = {
763 	    {CDATA_LEFT_VOLUME, M3_DEFAULT_VOL},
764 	    {CDATA_RIGHT_VOLUME, M3_DEFAULT_VOL},
765 	    {SRC3_DIRECTION_OFFSET, 1},
766 	    {SRC3_DIRECTION_OFFSET + 3, 0x0000},
767 	    {SRC3_DIRECTION_OFFSET + 4, 0},
768 	    {SRC3_DIRECTION_OFFSET + 5, 0},
769 	    {SRC3_DIRECTION_OFFSET + 6, 0},
770 	    {SRC3_DIRECTION_OFFSET + 7, 0},
771 	    {SRC3_DIRECTION_OFFSET + 8, 0},
772 	    {SRC3_DIRECTION_OFFSET + 9, 0},
773 	    {SRC3_DIRECTION_OFFSET + 10, 0x8000},
774 	    {SRC3_DIRECTION_OFFSET + 11, 0xFF00},
775 	    {SRC3_DIRECTION_OFFSET + 13, 0},
776 	    {SRC3_DIRECTION_OFFSET + 14, 0},
777 	    {SRC3_DIRECTION_OFFSET + 15, 0},
778 	    {SRC3_DIRECTION_OFFSET + 16, 50},
779 	    {SRC3_DIRECTION_OFFSET + 17, 8},
780 	    {SRC3_DIRECTION_OFFSET + 18, 0},
781 	    {SRC3_DIRECTION_OFFSET + 19, 0},
782 	    {SRC3_DIRECTION_OFFSET + 20, 0},
783 	    {SRC3_DIRECTION_OFFSET + 21, 0},
784 	    {SRC3_DIRECTION_OFFSET + 22, 0xff}
785 	};
786 
787 	M3_LOCK(sc);
788 	idx = sc->rch_cnt; /* adc instance number, no active reuse! */
789         M3_DEBUG(CHANGE, ("m3_rchan_init(adc=%d)\n", idx));
790 
791 	if (dir != PCMDIR_REC) {
792 		M3_UNLOCK(sc);
793 		device_printf(sc->dev, "m3_pchan_init not PCMDIR_REC\n");
794 		return (NULL);
795 	}
796 
797 	data_bytes = (((MINISRC_TMP_BUFFER_SIZE & ~1) +
798 			   (MINISRC_IN_BUFFER_SIZE & ~1) +
799 			   (MINISRC_OUT_BUFFER_SIZE & ~1) + 4) + 255) &~ 255;
800 	adc_data = 0x1100 + (data_bytes * idx) + data_bytes/2;
801 	dsp_in_size = MINISRC_IN_BUFFER_SIZE + (0x10 * 2);
802 	dsp_out_size = MINISRC_OUT_BUFFER_SIZE - (0x10 * 2);
803 	dsp_in_buf = adc_data + (MINISRC_TMP_BUFFER_SIZE / 2);
804 	dsp_out_buf = dsp_in_buf + (dsp_in_size / 2) + 1;
805 
806 	ch = &sc->rch[idx];
807 	ch->adc_idx = idx;
808 	ch->adc_data = adc_data;
809 	if (ch->adc_data + data_bytes/2 >= 0x1c00) {
810 		M3_UNLOCK(sc);
811 		device_printf(sc->dev, "m3_rchan_init: revb mem exhausted\n");
812 		return (NULL);
813 	}
814 
815 	ch->buffer = b;
816 	ch->parent = sc;
817 	ch->channel = c;
818 	ch->fmt = SND_FORMAT(AFMT_U8, 1, 0);
819 	ch->spd = DSP_DEFAULT_SPEED;
820 	M3_UNLOCK(sc); /* XXX */
821 	if (sndbuf_alloc(ch->buffer, sc->parent_dmat, 0, sc->bufsz) != 0) {
822 		device_printf(sc->dev, "m3_rchan_init chn_allocbuf failed\n");
823 		return (NULL);
824 	}
825 	M3_LOCK(sc);
826 	ch->bufsize = sndbuf_getsize(ch->buffer);
827 
828 	/* host dma buffer pointers */
829 	bus_addr = sndbuf_getbufaddr(ch->buffer);
830 	if (bus_addr & 3) {
831 		device_printf(sc->dev, "m3_rchan_init unaligned bus_addr\n");
832 		bus_addr = (bus_addr + 4) & ~3;
833 	}
834 	m3_wr_assp_data(sc, ch->adc_data + CDATA_HOST_SRC_ADDRL, LO(bus_addr));
835 	m3_wr_assp_data(sc, ch->adc_data + CDATA_HOST_SRC_ADDRH, HI(bus_addr));
836 	m3_wr_assp_data(sc, ch->adc_data + CDATA_HOST_SRC_END_PLUS_1L,
837 			LO(bus_addr + ch->bufsize));
838 	m3_wr_assp_data(sc, ch->adc_data + CDATA_HOST_SRC_END_PLUS_1H,
839 			HI(bus_addr + ch->bufsize));
840 	m3_wr_assp_data(sc, ch->adc_data + CDATA_HOST_SRC_CURRENTL,
841 			LO(bus_addr));
842 	m3_wr_assp_data(sc, ch->adc_data + CDATA_HOST_SRC_CURRENTH,
843 			HI(bus_addr));
844 
845 	/* dsp buffers */
846 	m3_wr_assp_data(sc, ch->adc_data + CDATA_IN_BUF_BEGIN, dsp_in_buf);
847 	m3_wr_assp_data(sc, ch->adc_data + CDATA_IN_BUF_END_PLUS_1,
848 			dsp_in_buf + dsp_in_size/2);
849 	m3_wr_assp_data(sc, ch->adc_data + CDATA_IN_BUF_HEAD, dsp_in_buf);
850 	m3_wr_assp_data(sc, ch->adc_data + CDATA_IN_BUF_TAIL, dsp_in_buf);
851 	m3_wr_assp_data(sc, ch->adc_data + CDATA_OUT_BUF_BEGIN, dsp_out_buf);
852 	m3_wr_assp_data(sc, ch->adc_data + CDATA_OUT_BUF_END_PLUS_1,
853 			dsp_out_buf + dsp_out_size/2);
854 	m3_wr_assp_data(sc, ch->adc_data + CDATA_OUT_BUF_HEAD, dsp_out_buf);
855 	m3_wr_assp_data(sc, ch->adc_data + CDATA_OUT_BUF_TAIL, dsp_out_buf);
856 
857 	/* some per client initializers */
858 	m3_wr_assp_data(sc, ch->adc_data + SRC3_DIRECTION_OFFSET + 12,
859 			ch->adc_data + 40 + 8);
860 	m3_wr_assp_data(sc, ch->adc_data + CDATA_DMA_CONTROL,
861 			DMACONTROL_DIRECTION + DMACONTROL_AUTOREPEAT +
862 			DMAC_PAGE3_SELECTOR + DMAC_BLOCKF_SELECTOR);
863 
864 	/* set an armload of static initializers */
865 	for(i = 0 ; i < nitems(rv); i++) {
866 		m3_wr_assp_data(sc, ch->adc_data + rv[i].addr, rv[i].val);
867 	}
868 
869 	/* put us in the packed task lists */
870 	m3_wr_assp_data(sc, KDATA_INSTANCE0_MINISRC +
871 			(sc->pch_cnt + sc->rch_cnt),
872 			ch->adc_data >> DP_SHIFT_COUNT);
873 	m3_wr_assp_data(sc, KDATA_DMA_XFER0 + (sc->pch_cnt + sc->rch_cnt),
874 			ch->adc_data >> DP_SHIFT_COUNT);
875 	m3_wr_assp_data(sc, KDATA_ADC1_XFER0 + sc->rch_cnt,
876 			ch->adc_data >> DP_SHIFT_COUNT);
877 
878 	/* gotta start before stop */
879 	m3_rchan_trigger_locked(NULL, ch, PCMTRIG_START);
880 	/* stop on init */
881 	m3_rchan_trigger_locked(NULL, ch, PCMTRIG_STOP);
882 
883 	sc->rch_cnt++;
884 	M3_UNLOCK(sc);
885 
886 	return (ch);
887 }
888 
889 static int
890 m3_rchan_free(kobj_t kobj, void *chdata)
891 {
892 	struct sc_rchinfo *ch = chdata;
893 	struct sc_info *sc = ch->parent;
894 
895 	M3_LOCK(sc);
896         M3_DEBUG(CHANGE, ("m3_rchan_free(adc=%d)\n", ch->adc_idx));
897 
898 	/*
899 	 * should remove this exact instance from the packed lists, but all
900 	 * are released at once (and in a stopped state) so this is ok.
901 	 */
902 	m3_wr_assp_data(sc, KDATA_INSTANCE0_MINISRC +
903 			(sc->rch_cnt - 1) + sc->pch_cnt, 0);
904 	m3_wr_assp_data(sc, KDATA_DMA_XFER0 +
905 			(sc->rch_cnt - 1) + sc->pch_cnt, 0);
906 	m3_wr_assp_data(sc, KDATA_ADC1_XFER0 + (sc->rch_cnt - 1), 0);
907 	sc->rch_cnt--;
908 	M3_UNLOCK(sc);
909 
910 	return (0);
911 }
912 
913 static int
914 m3_rchan_setformat(kobj_t kobj, void *chdata, u_int32_t format)
915 {
916 	struct sc_rchinfo *ch = chdata;
917 	struct sc_info *sc = ch->parent;
918 	u_int32_t data;
919 
920 	M3_LOCK(sc);
921 	M3_DEBUG(CHANGE,
922 		 ("m3_rchan_setformat(dac=%d, format=0x%x{%s-%s})\n",
923 		  ch->adc_idx, format,
924 		  format & (AFMT_U8|AFMT_S8) ? "8bit":"16bit",
925 		  (AFMT_CHANNEL(format) > 1) ? "STEREO":"MONO"));
926 
927 	/* mono word */
928         data = (AFMT_CHANNEL(format) > 1) ? 0 : 1;
929         m3_wr_assp_data(sc, ch->adc_data + SRC3_MODE_OFFSET, data);
930 
931         /* 8bit word */
932         data = ((format & AFMT_U8) || (format & AFMT_S8)) ? 1 : 0;
933         m3_wr_assp_data(sc, ch->adc_data + SRC3_WORD_LENGTH_OFFSET, data);
934         ch->fmt = format;
935 	M3_UNLOCK(sc);
936 
937         return (0);
938 }
939 
940 static u_int32_t
941 m3_rchan_setspeed(kobj_t kobj, void *chdata, u_int32_t speed)
942 {
943 	struct sc_rchinfo *ch = chdata;
944 	struct sc_info *sc = ch->parent;
945 	u_int32_t freq;
946 
947 	M3_LOCK(sc);
948 	M3_DEBUG(CHANGE, ("m3_rchan_setspeed(adc=%d, speed=%d)\n",
949 			  ch->adc_idx, speed));
950 
951         if ((freq = ((speed << 15) + 24000) / 48000) != 0) {
952                 freq--;
953         }
954 
955         m3_wr_assp_data(sc, ch->adc_data + CDATA_FREQUENCY, freq);
956 	ch->spd = speed;
957 	M3_UNLOCK(sc);
958 
959 	/* return closest possible speed */
960 	return (speed);
961 }
962 
963 static u_int32_t
964 m3_rchan_setblocksize(kobj_t kobj, void *chdata, u_int32_t blocksize)
965 {
966 	struct sc_rchinfo *ch = chdata;
967 
968 	M3_DEBUG(CHANGE, ("m3_rchan_setblocksize(adc=%d, blocksize=%d)\n",
969 			  ch->adc_idx, blocksize));
970 
971 	return (sndbuf_getblksz(ch->buffer));
972 }
973 
974 static int
975 m3_rchan_trigger(kobj_t kobj, void *chdata, int go)
976 {
977 	struct sc_rchinfo *ch = chdata;
978 	struct sc_info *sc = ch->parent;
979 	int ret;
980 
981 	if (!PCMTRIG_COMMON(go))
982 		return (0);
983 
984 	M3_LOCK(sc);
985 	ret = m3_rchan_trigger_locked(kobj, chdata, go);
986 	M3_UNLOCK(sc);
987 
988 	return (ret);
989 }
990 
991 static int
992 m3_rchan_trigger_locked(kobj_t kobj, void *chdata, int go)
993 {
994 	struct sc_rchinfo *ch = chdata;
995 	struct sc_info *sc = ch->parent;
996 	u_int32_t data;
997 
998 	M3_LOCK_ASSERT(sc);
999 	M3_DEBUG(go == PCMTRIG_START ? CHANGE :
1000 		 go == PCMTRIG_STOP ? CHANGE :
1001 		 go == PCMTRIG_ABORT ? CHANGE :
1002 		 CALL,
1003 		 ("m3_rchan_trigger(adc=%d, go=0x%x{%s})\n", ch->adc_idx, go,
1004 		  go == PCMTRIG_START ? "PCMTRIG_START" :
1005 		  go == PCMTRIG_STOP ? "PCMTRIG_STOP" :
1006 		  go == PCMTRIG_ABORT ? "PCMTRIG_ABORT" : "ignore"));
1007 
1008 	switch(go) {
1009 	case PCMTRIG_START:
1010 		if (ch->active) {
1011 			return 0;
1012 		}
1013 		ch->active = 1;
1014 		ch->ptr = 0;
1015 		ch->prevptr = 0;
1016 
1017 		/*[[inc_timer_users]]*/
1018 		if (m3_chan_active(sc) == 1) {
1019 	                m3_wr_assp_data(sc, KDATA_TIMER_COUNT_RELOAD, 240);
1020         	        m3_wr_assp_data(sc, KDATA_TIMER_COUNT_CURRENT, 240);
1021                 	data = m3_rd_2(sc, HOST_INT_CTRL);
1022 	                m3_wr_2(sc, HOST_INT_CTRL, data | CLKRUN_GEN_ENABLE);
1023 		}
1024 
1025                 m3_wr_assp_data(sc, KDATA_ADC1_REQUEST, 1);
1026                 m3_wr_assp_data(sc, ch->adc_data + CDATA_INSTANCE_READY, 1);
1027 		break;
1028 
1029 	case PCMTRIG_STOP:
1030 	case PCMTRIG_ABORT:
1031 		if (ch->active == 0) {
1032 			return 0;
1033 		}
1034 		ch->active = 0;
1035 
1036 		/*[[dec_timer_users]]*/
1037 		if (m3_chan_active(sc) == 0) {
1038 	                m3_wr_assp_data(sc, KDATA_TIMER_COUNT_RELOAD, 0);
1039         	        m3_wr_assp_data(sc, KDATA_TIMER_COUNT_CURRENT, 0);
1040                 	data = m3_rd_2(sc, HOST_INT_CTRL);
1041 	                m3_wr_2(sc, HOST_INT_CTRL, data & ~CLKRUN_GEN_ENABLE);
1042 		}
1043 
1044                 m3_wr_assp_data(sc, ch->adc_data + CDATA_INSTANCE_READY, 0);
1045                 m3_wr_assp_data(sc, KDATA_ADC1_REQUEST, 0);
1046 		break;
1047 
1048 	case PCMTRIG_EMLDMAWR:
1049 		/* got play irq, transfer next buffer - ignore if using dma */
1050 	case PCMTRIG_EMLDMARD:
1051 		/* got rec irq, transfer next buffer - ignore if using dma */
1052 	default:
1053 		break;
1054 	}
1055 	return 0;
1056 }
1057 
1058 static u_int32_t
1059 m3_rchan_getptr_internal(struct sc_rchinfo *ch)
1060 {
1061 	struct sc_info *sc = ch->parent;
1062 	u_int32_t hi, lo, bus_base, bus_crnt;
1063 
1064 	bus_base = sndbuf_getbufaddr(ch->buffer);
1065 	hi = m3_rd_assp_data(sc, ch->adc_data + CDATA_HOST_SRC_CURRENTH);
1066         lo = m3_rd_assp_data(sc, ch->adc_data + CDATA_HOST_SRC_CURRENTL);
1067         bus_crnt = lo | (hi << 16);
1068 
1069 	M3_DEBUG(CALL, ("m3_rchan_getptr(adc=%d) result=%d\n",
1070 			ch->adc_idx, bus_crnt - bus_base));
1071 
1072 	return (bus_crnt - bus_base); /* current byte offset of channel */
1073 }
1074 
1075 static u_int32_t
1076 m3_rchan_getptr(kobj_t kobj, void *chdata)
1077 {
1078 	struct sc_rchinfo *ch = chdata;
1079 	struct sc_info *sc = ch->parent;
1080 	u_int32_t ptr;
1081 
1082 	M3_LOCK(sc);
1083 	ptr = ch->ptr;
1084 	M3_UNLOCK(sc);
1085 
1086 	return (ptr);
1087 }
1088 
1089 static struct pcmchan_caps *
1090 m3_rchan_getcaps(kobj_t kobj, void *chdata)
1091 {
1092 	struct sc_rchinfo *ch = chdata;
1093 
1094         M3_DEBUG(CALL, ("m3_rchan_getcaps(adc=%d)\n", ch->adc_idx));
1095 
1096 	return &m3_reccaps;
1097 }
1098 
1099 /* -------------------------------------------------------------------- */
1100 /* The interrupt handler */
1101 
1102 static void
1103 m3_intr(void *p)
1104 {
1105 	struct sc_info *sc = (struct sc_info *)p;
1106 	struct sc_pchinfo *pch;
1107 	struct sc_rchinfo *rch;
1108 	u_int32_t status, ctl, i, delta;
1109 
1110 	M3_DEBUG(INTR, ("m3_intr\n"));
1111 
1112 	M3_LOCK(sc);
1113 	status = m3_rd_1(sc, HOST_INT_STATUS);
1114 	if (!status) {
1115 		M3_UNLOCK(sc);
1116 		return;
1117 	}
1118 
1119 	m3_wr_1(sc, HOST_INT_STATUS, 0xff); /* ack the int? */
1120 
1121 	if (status & HV_INT_PENDING) {
1122 		u_int8_t event;
1123 
1124 		event = m3_rd_1(sc, HW_VOL_COUNTER_MASTER);
1125 		switch (event) {
1126 		case 0x99:
1127 			mixer_hwvol_mute(sc->dev);
1128 			break;
1129 		case 0xaa:
1130 			mixer_hwvol_step(sc->dev, 1, 1);
1131 			break;
1132 		case 0x66:
1133 			mixer_hwvol_step(sc->dev, -1, -1);
1134 			break;
1135 		case 0x88:
1136 			break;
1137 		default:
1138 			device_printf(sc->dev, "Unknown HWVOL event\n");
1139 		}
1140 		m3_wr_1(sc, HW_VOL_COUNTER_MASTER, 0x88);
1141 	}
1142 
1143 	if (status & ASSP_INT_PENDING) {
1144 		ctl = m3_rd_1(sc, ASSP_CONTROL_B);
1145 		if (!(ctl & STOP_ASSP_CLOCK)) {
1146 			ctl = m3_rd_1(sc, ASSP_HOST_INT_STATUS);
1147 			if (ctl & DSP2HOST_REQ_TIMER) {
1148 				m3_wr_1(sc, ASSP_HOST_INT_STATUS,
1149 					DSP2HOST_REQ_TIMER);
1150 				/*[[ess_update_ptr]]*/
1151 				goto m3_handle_channel_intr;
1152 			}
1153 		}
1154 	}
1155 
1156 	goto m3_handle_channel_intr_out;
1157 
1158 m3_handle_channel_intr:
1159 	for (i=0 ; i<sc->pch_cnt ; i++) {
1160 		pch = &sc->pch[i];
1161 		if (pch->active) {
1162 			pch->ptr = m3_pchan_getptr_internal(pch);
1163 			delta = pch->bufsize + pch->ptr - pch->prevptr;
1164 			delta %= pch->bufsize;
1165 			if (delta < sndbuf_getblksz(pch->buffer))
1166 				continue;
1167 			pch->prevptr = pch->ptr;
1168 			M3_UNLOCK(sc);
1169 			chn_intr(pch->channel);
1170 			M3_LOCK(sc);
1171 		}
1172 	}
1173 	for (i=0 ; i<sc->rch_cnt ; i++) {
1174 		rch = &sc->rch[i];
1175 		if (rch->active) {
1176 			rch->ptr = m3_rchan_getptr_internal(rch);
1177 			delta = rch->bufsize + rch->ptr - rch->prevptr;
1178 			delta %= rch->bufsize;
1179 			if (delta < sndbuf_getblksz(rch->buffer))
1180 				continue;
1181 			rch->prevptr = rch->ptr;
1182 			M3_UNLOCK(sc);
1183 			chn_intr(rch->channel);
1184 			M3_LOCK(sc);
1185 		}
1186 	}
1187 
1188 m3_handle_channel_intr_out:
1189 	M3_UNLOCK(sc);
1190 }
1191 
1192 /* -------------------------------------------------------------------- */
1193 /* stuff */
1194 
1195 static int
1196 m3_power(struct sc_info *sc, int state)
1197 {
1198 	u_int32_t data;
1199 
1200 	M3_DEBUG(CHANGE, ("m3_power(%d)\n", state));
1201 	M3_LOCK_ASSERT(sc);
1202 
1203 	data = pci_read_config(sc->dev, 0x34, 1);
1204 	if (pci_read_config(sc->dev, data, 1) == 1) {
1205 		pci_write_config(sc->dev, data + 4, state, 1);
1206 	}
1207 
1208 	return 0;
1209 }
1210 
1211 static int
1212 m3_init(struct sc_info *sc)
1213 {
1214 	u_int32_t data, i, size;
1215 	u_int8_t reset_state;
1216 
1217 	M3_LOCK_ASSERT(sc);
1218         M3_DEBUG(CHANGE, ("m3_init\n"));
1219 
1220 	/* diable legacy emulations. */
1221 	data = pci_read_config(sc->dev, PCI_LEGACY_AUDIO_CTRL, 2);
1222 	data |= DISABLE_LEGACY;
1223 	pci_write_config(sc->dev, PCI_LEGACY_AUDIO_CTRL, data, 2);
1224 
1225 	m3_config(sc);
1226 
1227 	reset_state = m3_assp_halt(sc);
1228 
1229 	m3_codec_reset(sc);
1230 
1231 	/* [m3_assp_init] */
1232 	/* zero kernel data */
1233 	size = REV_B_DATA_MEMORY_UNIT_LENGTH * NUM_UNITS_KERNEL_DATA;
1234 	for(i = 0 ; i < size / 2 ; i++) {
1235 		m3_wr_assp_data(sc, KDATA_BASE_ADDR + i, 0);
1236 	}
1237 	/* zero mixer data? */
1238 	size = REV_B_DATA_MEMORY_UNIT_LENGTH * NUM_UNITS_KERNEL_DATA;
1239 	for(i = 0 ; i < size / 2 ; i++) {
1240 		m3_wr_assp_data(sc, KDATA_BASE_ADDR2 + i, 0);
1241 	}
1242 	/* init dma pointer */
1243 	m3_wr_assp_data(sc, KDATA_CURRENT_DMA,
1244 			KDATA_DMA_XFER0);
1245 	/* write kernel into code memory */
1246 	size = sizeof(gaw_kernel_vect_code);
1247 	for(i = 0 ; i < size / 2; i++) {
1248 		m3_wr_assp_code(sc, REV_B_CODE_MEMORY_BEGIN + i,
1249 				gaw_kernel_vect_code[i]);
1250 	}
1251 	/*
1252 	 * We only have this one client and we know that 0x400 is free in
1253 	 * our kernel's mem map, so lets just drop it there.  It seems that
1254 	 * the minisrc doesn't need vectors, so we won't bother with them..
1255 	 */
1256 	size = sizeof(gaw_minisrc_code_0400);
1257 	for(i = 0 ; i < size / 2; i++) {
1258 		m3_wr_assp_code(sc, 0x400 + i, gaw_minisrc_code_0400[i]);
1259 	}
1260 	/* write the coefficients for the low pass filter? */
1261 	size = sizeof(minisrc_lpf);
1262 	for(i = 0; i < size / 2 ; i++) {
1263 		m3_wr_assp_code(sc,0x400 + MINISRC_COEF_LOC + i,
1264 				minisrc_lpf[i]);
1265 	}
1266 	m3_wr_assp_code(sc, 0x400 + MINISRC_COEF_LOC + size, 0x8000);
1267 	/* the minisrc is the only thing on our task list */
1268 	m3_wr_assp_data(sc, KDATA_TASK0, 0x400);
1269 	/* init the mixer number */
1270 	m3_wr_assp_data(sc, KDATA_MIXER_TASK_NUMBER, 0);
1271 	/* extreme kernel master volume */
1272 	m3_wr_assp_data(sc, KDATA_DAC_LEFT_VOLUME, M3_DEFAULT_VOL);
1273 	m3_wr_assp_data(sc, KDATA_DAC_RIGHT_VOLUME, M3_DEFAULT_VOL);
1274 
1275 	m3_amp_enable(sc);
1276 
1277 	/* [m3_assp_client_init] (only one client at index 0) */
1278 	for (i=0x1100 ; i<0x1c00 ; i++) {
1279 		m3_wr_assp_data(sc, i, 0); /* zero entire dac/adc area */
1280 	}
1281 
1282 	/* [m3_assp_continue] */
1283 	m3_wr_1(sc, DSP_PORT_CONTROL_REG_B, reset_state | REGB_ENABLE_RESET);
1284 
1285 	return 0;
1286 }
1287 
1288 static int
1289 m3_uninit(struct sc_info *sc)
1290 {
1291         M3_DEBUG(CHANGE, ("m3_uninit\n"));
1292 	return 0;
1293 }
1294 
1295 /* -------------------------------------------------------------------- */
1296 /* Probe and attach the card */
1297 
1298 static int
1299 m3_pci_probe(device_t dev)
1300 {
1301 	struct m3_card_type *card;
1302 
1303 	M3_DEBUG(CALL, ("m3_pci_probe(0x%x)\n", pci_get_devid(dev)));
1304 
1305 	for (card = m3_card_types ; card->pci_id ; card++) {
1306 		if (pci_get_devid(dev) == card->pci_id) {
1307 			device_set_desc(dev, card->name);
1308 			return BUS_PROBE_DEFAULT;
1309 		}
1310 	}
1311 	return ENXIO;
1312 }
1313 
1314 static int
1315 m3_pci_attach(device_t dev)
1316 {
1317 	struct sc_info *sc;
1318 	struct ac97_info *codec = NULL;
1319 	char status[SND_STATUSLEN];
1320 	struct m3_card_type *card;
1321 	int i, len, dacn, adcn;
1322 
1323 	M3_DEBUG(CALL, ("m3_pci_attach\n"));
1324 
1325 	sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
1326 	sc->dev = dev;
1327 	sc->type = pci_get_devid(dev);
1328 	sc->sc_lock = snd_mtxcreate(device_get_nameunit(dev),
1329 	    "snd_maestro3 softc");
1330 	for (card = m3_card_types ; card->pci_id ; card++) {
1331 		if (sc->type == card->pci_id) {
1332 			sc->which = card->which;
1333 			sc->delay1 = card->delay1;
1334 			sc->delay2 = card->delay2;
1335 			break;
1336 		}
1337 	}
1338 
1339 	if (resource_int_value(device_get_name(dev), device_get_unit(dev),
1340 	    "dac", &i) == 0) {
1341 	    	if (i < 1)
1342 			dacn = 1;
1343 		else if (i > M3_PCHANS)
1344 			dacn = M3_PCHANS;
1345 		else
1346 			dacn = i;
1347 	} else
1348 		dacn = M3_PCHANS;
1349 
1350 	adcn = M3_RCHANS;
1351 
1352 	pci_enable_busmaster(dev);
1353 
1354 	sc->regid = PCIR_BAR(0);
1355 	sc->regtype = SYS_RES_MEMORY;
1356 	sc->reg = bus_alloc_resource_any(dev, sc->regtype, &sc->regid,
1357 					 RF_ACTIVE);
1358 	if (!sc->reg) {
1359 		sc->regtype = SYS_RES_IOPORT;
1360 		sc->reg = bus_alloc_resource_any(dev, sc->regtype, &sc->regid,
1361 						 RF_ACTIVE);
1362 	}
1363 	if (!sc->reg) {
1364 		device_printf(dev, "unable to allocate register space\n");
1365 		goto bad;
1366 	}
1367 	sc->st = rman_get_bustag(sc->reg);
1368 	sc->sh = rman_get_bushandle(sc->reg);
1369 
1370 	sc->irqid = 0;
1371 	sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqid,
1372 					 RF_ACTIVE | RF_SHAREABLE);
1373 	if (!sc->irq) {
1374 		device_printf(dev, "unable to allocate interrupt\n");
1375 		goto bad;
1376 	}
1377 
1378 	if (snd_setup_intr(dev, sc->irq, INTR_MPSAFE, m3_intr, sc, &sc->ih)) {
1379 		device_printf(dev, "unable to setup interrupt\n");
1380 		goto bad;
1381 	}
1382 
1383 	sc->bufsz = pcm_getbuffersize(dev, M3_BUFSIZE_MIN, M3_BUFSIZE_DEFAULT,
1384 	    M3_BUFSIZE_MAX);
1385 
1386 	if (bus_dma_tag_create(
1387 	    bus_get_dma_tag(dev),	/* parent */
1388 	    2, 0,		/* alignment, boundary */
1389 	    M3_MAXADDR,		/* lowaddr */
1390 	    BUS_SPACE_MAXADDR,	/* highaddr */
1391 	    NULL, NULL,		/* filtfunc, filtfuncarg */
1392 	    sc->bufsz,		/* maxsize */
1393 	    1,			/* nsegments */
1394 	    0x3ffff,		/* maxsegz */
1395 	    0,			/* flags */
1396 	    NULL,		/* lockfunc */
1397 	    NULL,		/* lockfuncarg */
1398 	    &sc->parent_dmat) != 0) {
1399 		device_printf(dev, "unable to create dma tag\n");
1400 		goto bad;
1401 	}
1402 
1403 	M3_LOCK(sc);
1404 	m3_power(sc, 0); /* power up */
1405 	/* init chip */
1406 	i = m3_init(sc);
1407 	M3_UNLOCK(sc);
1408 	if (i == -1) {
1409 		device_printf(dev, "unable to initialize the card\n");
1410 		goto bad;
1411 	}
1412 
1413 	/* create/init mixer */
1414 	codec = AC97_CREATE(dev, sc, m3_codec);
1415 	if (codec == NULL) {
1416 		device_printf(dev, "ac97_create error\n");
1417 		goto bad;
1418 	}
1419 	if (mixer_init(dev, ac97_getmixerclass(), codec)) {
1420 		device_printf(dev, "mixer_init error\n");
1421 		goto bad;
1422 	}
1423 
1424 	m3_enable_ints(sc);
1425 
1426 	if (pcm_register(dev, sc, dacn, adcn)) {
1427 		device_printf(dev, "pcm_register error\n");
1428 		goto bad;
1429 	}
1430 	for (i=0 ; i<dacn ; i++) {
1431 		if (pcm_addchan(dev, PCMDIR_PLAY, &m3_pch_class, sc)) {
1432 			device_printf(dev, "pcm_addchan (play) error\n");
1433 			goto bad;
1434 		}
1435 	}
1436 	for (i=0 ; i<adcn ; i++) {
1437 		if (pcm_addchan(dev, PCMDIR_REC, &m3_rch_class, sc)) {
1438 			device_printf(dev, "pcm_addchan (rec) error\n");
1439 			goto bad;
1440 		}
1441 	}
1442 	snprintf(status, SND_STATUSLEN, "%s 0x%jx irq %jd on %s",
1443 	    (sc->regtype == SYS_RES_IOPORT)? "port" : "mem",
1444 	    rman_get_start(sc->reg), rman_get_start(sc->irq),
1445 	    device_get_nameunit(device_get_parent(dev)));
1446 	if (pcm_setstatus(dev, status)) {
1447 		device_printf(dev, "attach: pcm_setstatus error\n");
1448 		goto bad;
1449 	}
1450 
1451 	mixer_hwvol_init(dev);
1452 
1453 	/* Create the buffer for saving the card state during suspend */
1454 	len = sizeof(u_int16_t) * (REV_B_CODE_MEMORY_LENGTH +
1455 	    REV_B_DATA_MEMORY_LENGTH);
1456 	sc->savemem = malloc(len, M_DEVBUF, M_WAITOK | M_ZERO);
1457 
1458 	return 0;
1459 
1460  bad:
1461 	if (codec)
1462 		ac97_destroy(codec);
1463 	if (sc->ih)
1464 		bus_teardown_intr(dev, sc->irq, sc->ih);
1465 	if (sc->irq)
1466 		bus_release_resource(dev, SYS_RES_IRQ, sc->irqid, sc->irq);
1467 	if (sc->reg)
1468 		bus_release_resource(dev, sc->regtype, sc->regid, sc->reg);
1469 	if (sc->parent_dmat)
1470 		bus_dma_tag_destroy(sc->parent_dmat);
1471 	if (sc->sc_lock)
1472 		snd_mtxfree(sc->sc_lock);
1473 	free(sc, M_DEVBUF);
1474 	return ENXIO;
1475 }
1476 
1477 static int
1478 m3_pci_detach(device_t dev)
1479 {
1480 	struct sc_info *sc = pcm_getdevinfo(dev);
1481 	int r;
1482 
1483 	M3_DEBUG(CALL, ("m3_pci_detach\n"));
1484 
1485 	if ((r = pcm_unregister(dev)) != 0) {
1486 		return r;
1487 	}
1488 
1489 	M3_LOCK(sc);
1490 	m3_uninit(sc); /* shutdown chip */
1491 	m3_power(sc, 3); /* power off */
1492 	M3_UNLOCK(sc);
1493 
1494 	bus_teardown_intr(dev, sc->irq, sc->ih);
1495 	bus_release_resource(dev, SYS_RES_IRQ, sc->irqid, sc->irq);
1496 	bus_release_resource(dev, sc->regtype, sc->regid, sc->reg);
1497 	bus_dma_tag_destroy(sc->parent_dmat);
1498 
1499 	free(sc->savemem, M_DEVBUF);
1500 	snd_mtxfree(sc->sc_lock);
1501 	free(sc, M_DEVBUF);
1502 	return 0;
1503 }
1504 
1505 static int
1506 m3_pci_suspend(device_t dev)
1507 {
1508 	struct sc_info *sc = pcm_getdevinfo(dev);
1509 	int i, index = 0;
1510 
1511         M3_DEBUG(CHANGE, ("m3_pci_suspend\n"));
1512 
1513 	M3_LOCK(sc);
1514 	for (i=0 ; i<sc->pch_cnt ; i++) {
1515 		if (sc->pch[i].active) {
1516 			m3_pchan_trigger_locked(NULL, &sc->pch[i],
1517 			    PCMTRIG_STOP);
1518 		}
1519 	}
1520 	for (i=0 ; i<sc->rch_cnt ; i++) {
1521 		if (sc->rch[i].active) {
1522 			m3_rchan_trigger_locked(NULL, &sc->rch[i],
1523 			    PCMTRIG_STOP);
1524 		}
1525 	}
1526 	DELAY(10 * 1000); /* give things a chance to stop */
1527 
1528 	/* Disable interrupts */
1529 	m3_wr_2(sc, HOST_INT_CTRL, 0);
1530 	m3_wr_1(sc, ASSP_CONTROL_C, 0);
1531 
1532 	m3_assp_halt(sc);
1533 
1534 	/* Save the state of the ASSP */
1535 	for (i = REV_B_CODE_MEMORY_BEGIN; i <= REV_B_CODE_MEMORY_END; i++)
1536 		sc->savemem[index++] = m3_rd_assp_code(sc, i);
1537 	for (i = REV_B_DATA_MEMORY_BEGIN; i <= REV_B_DATA_MEMORY_END; i++)
1538 		sc->savemem[index++] = m3_rd_assp_data(sc, i);
1539 
1540 	/* Power down the card to D3 state */
1541 	m3_power(sc, 3);
1542 	M3_UNLOCK(sc);
1543 
1544 	return 0;
1545 }
1546 
1547 static int
1548 m3_pci_resume(device_t dev)
1549 {
1550 	struct sc_info *sc = pcm_getdevinfo(dev);
1551 	int i, index = 0;
1552 	u_int8_t reset_state;
1553 
1554 	M3_DEBUG(CHANGE, ("m3_pci_resume\n"));
1555 
1556 	M3_LOCK(sc);
1557 	/* Power the card back to D0 */
1558 	m3_power(sc, 0);
1559 
1560 	m3_config(sc);
1561 
1562 	reset_state = m3_assp_halt(sc);
1563 
1564 	m3_codec_reset(sc);
1565 
1566 	/* Restore the ASSP state */
1567 	for (i = REV_B_CODE_MEMORY_BEGIN; i <= REV_B_CODE_MEMORY_END; i++)
1568 		m3_wr_assp_code(sc, i, sc->savemem[index++]);
1569 	for (i = REV_B_DATA_MEMORY_BEGIN; i <= REV_B_DATA_MEMORY_END; i++)
1570 		m3_wr_assp_data(sc, i, sc->savemem[index++]);
1571 
1572 	/* Restart the DMA engine */
1573 	m3_wr_assp_data(sc, KDATA_DMA_ACTIVE, 0);
1574 
1575 	/* [m3_assp_continue] */
1576 	m3_wr_1(sc, DSP_PORT_CONTROL_REG_B, reset_state | REGB_ENABLE_RESET);
1577 
1578 	m3_amp_enable(sc);
1579 
1580 	m3_enable_ints(sc);
1581 
1582 	M3_UNLOCK(sc); /* XXX */
1583 	if (mixer_reinit(dev) == -1) {
1584 		device_printf(dev, "unable to reinitialize the mixer\n");
1585 		return (ENXIO);
1586 	}
1587 	M3_LOCK(sc);
1588 
1589 	/* Turn the channels back on */
1590 	for (i=0 ; i<sc->pch_cnt ; i++) {
1591 		if (sc->pch[i].active) {
1592 			m3_pchan_trigger_locked(NULL, &sc->pch[i],
1593 			    PCMTRIG_START);
1594 		}
1595 	}
1596 	for (i=0 ; i<sc->rch_cnt ; i++) {
1597 		if (sc->rch[i].active) {
1598 			m3_rchan_trigger_locked(NULL, &sc->rch[i],
1599 			    PCMTRIG_START);
1600 		}
1601 	}
1602 
1603 	M3_UNLOCK(sc);
1604 	return 0;
1605 }
1606 
1607 static int
1608 m3_pci_shutdown(device_t dev)
1609 {
1610 	struct sc_info *sc = pcm_getdevinfo(dev);
1611 
1612 	M3_DEBUG(CALL, ("m3_pci_shutdown\n"));
1613 
1614 	M3_LOCK(sc);
1615 	m3_power(sc, 3); /* power off */
1616 	M3_UNLOCK(sc);
1617 
1618 	return 0;
1619 }
1620 
1621 static u_int8_t
1622 m3_assp_halt(struct sc_info *sc)
1623 {
1624 	u_int8_t data, reset_state;
1625 
1626 	M3_LOCK_ASSERT(sc);
1627 
1628 	data = m3_rd_1(sc, DSP_PORT_CONTROL_REG_B);
1629 	reset_state = data & ~REGB_STOP_CLOCK; /* remember for continue */
1630         DELAY(10 * 1000);
1631 	m3_wr_1(sc, DSP_PORT_CONTROL_REG_B, reset_state & ~REGB_ENABLE_RESET);
1632         DELAY(10 * 1000); /* necessary? */
1633 
1634 	return reset_state;
1635 }
1636 
1637 static void
1638 m3_config(struct sc_info *sc)
1639 {
1640 	u_int32_t data, hv_cfg;
1641 	int hint;
1642 
1643 	M3_LOCK_ASSERT(sc);
1644 
1645 	M3_UNLOCK(sc);
1646 	/*
1647 	 * The volume buttons can be wired up via two different sets of pins.
1648 	 * This presents a problem since we can't tell which way it's
1649 	 * configured.  Allow the user to set a hint in order to twiddle
1650 	 * the proper bits.
1651 	 */
1652 	if (resource_int_value(device_get_name(sc->dev),
1653 	                       device_get_unit(sc->dev),
1654 			       "hwvol_config", &hint) == 0)
1655 		hv_cfg = (hint > 0) ? HV_BUTTON_FROM_GD : 0;
1656 	else
1657 		hv_cfg = HV_BUTTON_FROM_GD;
1658 	M3_LOCK(sc);
1659 
1660 	data = pci_read_config(sc->dev, PCI_ALLEGRO_CONFIG, 4);
1661 	data &= ~HV_BUTTON_FROM_GD;
1662 	data |= REDUCED_DEBOUNCE | HV_CTRL_ENABLE | hv_cfg;
1663 	data |= PM_CTRL_ENABLE | CLK_DIV_BY_49 | USE_PCI_TIMING;
1664 	pci_write_config(sc->dev, PCI_ALLEGRO_CONFIG, data, 4);
1665 
1666 	m3_wr_1(sc, ASSP_CONTROL_B, RESET_ASSP);
1667 	data = pci_read_config(sc->dev, PCI_ALLEGRO_CONFIG, 4);
1668 	data &= ~INT_CLK_SELECT;
1669 	if (sc->which == ESS_MAESTRO3) {
1670 		data &= ~INT_CLK_MULT_ENABLE;
1671 		data |= INT_CLK_SRC_NOT_PCI;
1672 	}
1673 	data &= ~(CLK_MULT_MODE_SELECT | CLK_MULT_MODE_SELECT_2);
1674 	pci_write_config(sc->dev, PCI_ALLEGRO_CONFIG, data, 4);
1675 
1676 	if (sc->which == ESS_ALLEGRO_1) {
1677 		data = pci_read_config(sc->dev, PCI_USER_CONFIG, 4);
1678 		data |= IN_CLK_12MHZ_SELECT;
1679 		pci_write_config(sc->dev, PCI_USER_CONFIG, data, 4);
1680 	}
1681 
1682 	data = m3_rd_1(sc, ASSP_CONTROL_A);
1683 	data &= ~(DSP_CLK_36MHZ_SELECT | ASSP_CLK_49MHZ_SELECT);
1684 	data |= ASSP_CLK_49MHZ_SELECT; /*XXX assumes 49MHZ dsp XXX*/
1685 	data |= ASSP_0_WS_ENABLE;
1686 	m3_wr_1(sc, ASSP_CONTROL_A, data);
1687 
1688 	m3_wr_1(sc, ASSP_CONTROL_B, RUN_ASSP);
1689 }
1690 
1691 static void
1692 m3_enable_ints(struct sc_info *sc)
1693 {
1694 	u_int8_t data;
1695 
1696 	m3_wr_2(sc, HOST_INT_CTRL, ASSP_INT_ENABLE | HV_INT_ENABLE);
1697 	data = m3_rd_1(sc, ASSP_CONTROL_C);
1698 	m3_wr_1(sc, ASSP_CONTROL_C, data | ASSP_HOST_INT_ENABLE);
1699 }
1700 
1701 static void
1702 m3_amp_enable(struct sc_info *sc)
1703 {
1704 	u_int32_t gpo, polarity_port, polarity;
1705 	u_int16_t data;
1706 
1707 	M3_LOCK_ASSERT(sc);
1708 
1709 	switch (sc->which) {
1710         case ESS_ALLEGRO_1:
1711                 polarity_port = 0x1800;
1712                 break;
1713 	case ESS_MAESTRO3:
1714                 polarity_port = 0x1100;
1715                 break;
1716         default:
1717 		panic("bad sc->which");
1718 	}
1719 	gpo = (polarity_port >> 8) & 0x0f;
1720 	polarity = polarity_port >> 12;
1721 	polarity = !polarity; /* enable */
1722 	polarity = polarity << gpo;
1723 	gpo = 1 << gpo;
1724 	m3_wr_2(sc, GPIO_MASK, ~gpo);
1725 	data = m3_rd_2(sc, GPIO_DIRECTION);
1726 	m3_wr_2(sc, GPIO_DIRECTION, data | gpo);
1727 	data = GPO_SECONDARY_AC97 | GPO_PRIMARY_AC97 | polarity;
1728 	m3_wr_2(sc, GPIO_DATA, data);
1729 	m3_wr_2(sc, GPIO_MASK, ~0);
1730 }
1731 
1732 static void
1733 m3_codec_reset(struct sc_info *sc)
1734 {
1735 	u_int16_t data, dir;
1736 	int retry = 0;
1737 
1738 	M3_LOCK_ASSERT(sc);
1739 	do {
1740 		data = m3_rd_2(sc, GPIO_DIRECTION);
1741 		dir = data | 0x10; /* assuming pci bus master? */
1742 
1743 		/* [[remote_codec_config]] */
1744 		data = m3_rd_2(sc, RING_BUS_CTRL_B);
1745 		m3_wr_2(sc, RING_BUS_CTRL_B, data & ~SECOND_CODEC_ID_MASK);
1746 		data = m3_rd_2(sc, SDO_OUT_DEST_CTRL);
1747 		m3_wr_2(sc, SDO_OUT_DEST_CTRL, data & ~COMMAND_ADDR_OUT);
1748 		data = m3_rd_2(sc, SDO_IN_DEST_CTRL);
1749 		m3_wr_2(sc, SDO_IN_DEST_CTRL, data & ~STATUS_ADDR_IN);
1750 
1751 		m3_wr_2(sc, RING_BUS_CTRL_A, IO_SRAM_ENABLE);
1752 		DELAY(20);
1753 
1754 		m3_wr_2(sc, GPIO_DIRECTION, dir & ~GPO_PRIMARY_AC97);
1755 		m3_wr_2(sc, GPIO_MASK, ~GPO_PRIMARY_AC97);
1756 		m3_wr_2(sc, GPIO_DATA, 0);
1757 		m3_wr_2(sc, GPIO_DIRECTION, dir | GPO_PRIMARY_AC97);
1758 		DELAY(sc->delay1 * 1000); /*delay1 (ALLEGRO:50, MAESTRO3:20)*/
1759 		m3_wr_2(sc, GPIO_DATA, GPO_PRIMARY_AC97);
1760 		DELAY(5);
1761 		m3_wr_2(sc, RING_BUS_CTRL_A, IO_SRAM_ENABLE |
1762 		    SERIAL_AC_LINK_ENABLE);
1763 		m3_wr_2(sc, GPIO_MASK, ~0);
1764 		DELAY(sc->delay2 * 1000); /*delay2 (ALLEGRO:800, MAESTRO3:500)*/
1765 
1766 		/* [[try read vendor]] */
1767 		data = m3_rdcd(NULL, sc, 0x7c);
1768 		if ((data == 0) || (data == 0xffff)) {
1769 			retry++;
1770 			if (retry > 3) {
1771 				device_printf(sc->dev, "Codec reset failed\n");
1772 				break;
1773 			}
1774 			device_printf(sc->dev, "Codec reset retry\n");
1775 		} else retry = 0;
1776 	} while (retry);
1777 }
1778 
1779 static device_method_t m3_methods[] = {
1780 	DEVMETHOD(device_probe,		m3_pci_probe),
1781 	DEVMETHOD(device_attach,	m3_pci_attach),
1782 	DEVMETHOD(device_detach,	m3_pci_detach),
1783 	DEVMETHOD(device_suspend,       m3_pci_suspend),
1784 	DEVMETHOD(device_resume,        m3_pci_resume),
1785 	DEVMETHOD(device_shutdown,      m3_pci_shutdown),
1786 	{ 0, 0 }
1787 };
1788 
1789 static driver_t m3_driver = {
1790 	"pcm",
1791 	m3_methods,
1792 	PCM_SOFTC_SIZE,
1793 };
1794 
1795 DRIVER_MODULE(snd_maestro3, pci, m3_driver, 0, 0);
1796 MODULE_DEPEND(snd_maestro3, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
1797 MODULE_VERSION(snd_maestro3, 1);
1798