xref: /freebsd/sys/dev/sound/pci/ich.c (revision fcb560670601b2a4d87bb31d7531c8dcc37ee71b)
1 /*-
2  * Copyright (c) 2000 Katsurajima Naoto <raven@katsurajima.seya.yokohama.jp>
3  * Copyright (c) 2001 Cameron Grant <cg@freebsd.org>
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHERIN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THEPOSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 
28 #ifdef HAVE_KERNEL_OPTION_HEADERS
29 #include "opt_snd.h"
30 #endif
31 
32 #include <dev/sound/pcm/sound.h>
33 #include <dev/sound/pcm/ac97.h>
34 #include <dev/sound/pci/ich.h>
35 
36 #include <dev/pci/pcireg.h>
37 #include <dev/pci/pcivar.h>
38 
39 SND_DECLARE_FILE("$FreeBSD$");
40 
41 /* -------------------------------------------------------------------- */
42 
43 #define ICH_TIMEOUT		1000 /* semaphore timeout polling count */
44 #define ICH_DTBL_LENGTH		32
45 #define ICH_DEFAULT_BUFSZ	16384
46 #define ICH_MAX_BUFSZ		65536
47 #define ICH_MIN_BUFSZ		4096
48 #define ICH_DEFAULT_BLKCNT	2
49 #define ICH_MAX_BLKCNT		32
50 #define ICH_MIN_BLKCNT		2
51 #define ICH_MIN_BLKSZ		64
52 
53 #define INTEL_VENDORID	0x8086
54 #define SIS_VENDORID	0x1039
55 #define NVIDIA_VENDORID	0x10de
56 #define AMD_VENDORID	0x1022
57 
58 #define INTEL_82440MX	0x7195
59 #define INTEL_82801AA	0x2415
60 #define INTEL_82801AB	0x2425
61 #define INTEL_82801BA	0x2445
62 #define INTEL_82801CA	0x2485
63 #define INTEL_82801DB	0x24c5	/* ICH4 needs special handling */
64 #define INTEL_82801EB	0x24d5	/* ICH5 needs to be treated as ICH4 */
65 #define INTEL_6300ESB	0x25a6	/* 6300ESB needs to be treated as ICH4 */
66 #define INTEL_82801FB	0x266e	/* ICH6 needs to be treated as ICH4 */
67 #define INTEL_82801GB	0x27de	/* ICH7 needs to be treated as ICH4 */
68 #define SIS_7012	0x7012	/* SiS 7012 needs special handling */
69 #define NVIDIA_NFORCE	0x01b1
70 #define NVIDIA_NFORCE2	0x006a
71 #define NVIDIA_NFORCE2_400	0x008a
72 #define NVIDIA_NFORCE3	0x00da
73 #define NVIDIA_NFORCE3_250	0x00ea
74 #define NVIDIA_NFORCE4	0x0059
75 #define NVIDIA_NFORCE_410_MCP	0x026b
76 #define NVIDIA_NFORCE4_MCP	0x003a
77 #define AMD_768		0x7445
78 #define AMD_8111	0x746d
79 
80 #define ICH_LOCK(sc)		snd_mtxlock((sc)->ich_lock)
81 #define ICH_UNLOCK(sc)		snd_mtxunlock((sc)->ich_lock)
82 #define ICH_LOCK_ASSERT(sc)	snd_mtxassert((sc)->ich_lock)
83 
84 #if 0
85 #define ICH_DEBUG(stmt)		do {	\
86 	stmt				\
87 } while (0)
88 #else
89 #define ICH_DEBUG(...)
90 #endif
91 
92 #define ICH_CALIBRATE_DONE	(1 << 0)
93 #define ICH_IGNORE_PCR		(1 << 1)
94 #define ICH_IGNORE_RESET	(1 << 2)
95 #define ICH_FIXED_RATE		(1 << 3)
96 #define ICH_DMA_NOCACHE		(1 << 4)
97 #define ICH_HIGH_LATENCY	(1 << 5)
98 
99 static const struct ich_type {
100         uint16_t	vendor;
101         uint16_t	devid;
102 	uint32_t	options;
103 #define PROBE_LOW	0x01
104         char		*name;
105 } ich_devs[] = {
106 	{ INTEL_VENDORID,	INTEL_82440MX,	0,
107 		"Intel 440MX" },
108 	{ INTEL_VENDORID,	INTEL_82801AA,	0,
109 		"Intel ICH (82801AA)" },
110 	{ INTEL_VENDORID,	INTEL_82801AB,	0,
111 		"Intel ICH (82801AB)" },
112 	{ INTEL_VENDORID,	INTEL_82801BA,	0,
113 		"Intel ICH2 (82801BA)" },
114 	{ INTEL_VENDORID,	INTEL_82801CA,	0,
115 		"Intel ICH3 (82801CA)" },
116 	{ INTEL_VENDORID,	INTEL_82801DB,	PROBE_LOW,
117 		"Intel ICH4 (82801DB)" },
118 	{ INTEL_VENDORID,	INTEL_82801EB,	PROBE_LOW,
119 		"Intel ICH5 (82801EB)" },
120 	{ INTEL_VENDORID,	INTEL_6300ESB,	PROBE_LOW,
121 		"Intel 6300ESB" },
122 	{ INTEL_VENDORID,	INTEL_82801FB,	PROBE_LOW,
123 		"Intel ICH6 (82801FB)" },
124 	{ INTEL_VENDORID,	INTEL_82801GB,	PROBE_LOW,
125 		"Intel ICH7 (82801GB)" },
126 	{ SIS_VENDORID,		SIS_7012,	0,
127 		"SiS 7012" },
128 	{ NVIDIA_VENDORID,	NVIDIA_NFORCE,	0,
129 		"nVidia nForce" },
130 	{ NVIDIA_VENDORID,	NVIDIA_NFORCE2,	0,
131 		"nVidia nForce2" },
132 	{ NVIDIA_VENDORID,	NVIDIA_NFORCE2_400,	0,
133 		"nVidia nForce2 400" },
134 	{ NVIDIA_VENDORID,	NVIDIA_NFORCE3,	0,
135 		"nVidia nForce3" },
136 	{ NVIDIA_VENDORID,	NVIDIA_NFORCE3_250,	0,
137 		"nVidia nForce3 250" },
138 	{ NVIDIA_VENDORID,	NVIDIA_NFORCE4,	0,
139 		"nVidia nForce4" },
140 	{ NVIDIA_VENDORID,	NVIDIA_NFORCE_410_MCP,	0,
141 		"nVidia nForce 410 MCP" },
142 	{ NVIDIA_VENDORID,	NVIDIA_NFORCE4_MCP,	0,
143 		"nVidia nForce 4 MCP" },
144 	{ AMD_VENDORID,		AMD_768,	0,
145 		"AMD-768" },
146 	{ AMD_VENDORID,		AMD_8111,	0,
147 		"AMD-8111" }
148 };
149 
150 /* buffer descriptor */
151 struct ich_desc {
152 	volatile uint32_t buffer;
153 	volatile uint32_t length;
154 };
155 
156 struct sc_info;
157 
158 /* channel registers */
159 struct sc_chinfo {
160 	uint32_t num:8, run:1, run_save:1;
161 	uint32_t blksz, blkcnt, spd;
162 	uint32_t regbase, spdreg;
163 	uint32_t imask;
164 	uint32_t civ;
165 
166 	struct snd_dbuf *buffer;
167 	struct pcm_channel *channel;
168 	struct sc_info *parent;
169 
170 	struct ich_desc *dtbl;
171 	bus_addr_t desc_addr;
172 };
173 
174 /* device private data */
175 struct sc_info {
176 	device_t dev;
177 	int hasvra, hasvrm, hasmic;
178 	unsigned int chnum, bufsz, blkcnt;
179 	int sample_size, swap_reg;
180 
181 	struct resource *nambar, *nabmbar, *irq;
182 	int regtype, nambarid, nabmbarid, irqid;
183 	bus_space_tag_t nambart, nabmbart;
184 	bus_space_handle_t nambarh, nabmbarh;
185 	bus_dma_tag_t dmat, chan_dmat;
186 	bus_dmamap_t dtmap;
187 	void *ih;
188 
189 	struct ac97_info *codec;
190 	struct sc_chinfo ch[3];
191 	int ac97rate;
192 	struct ich_desc *dtbl;
193 	unsigned int dtbl_size;
194 	bus_addr_t desc_addr;
195 	struct intr_config_hook	intrhook;
196 	uint16_t vendor;
197 	uint16_t devid;
198 	uint32_t flags;
199 	struct mtx *ich_lock;
200 };
201 
202 /* -------------------------------------------------------------------- */
203 
204 static uint32_t ich_fmt[] = {
205 	SND_FORMAT(AFMT_S16_LE, 2, 0),
206 	0
207 };
208 static struct pcmchan_caps ich_vrcaps = {8000, 48000, ich_fmt, 0};
209 static struct pcmchan_caps ich_caps = {48000, 48000, ich_fmt, 0};
210 
211 /* -------------------------------------------------------------------- */
212 /* Hardware */
213 static __inline uint32_t
214 ich_rd(struct sc_info *sc, int regno, int size)
215 {
216 	switch (size) {
217 	case 1:
218 		return (bus_space_read_1(sc->nabmbart, sc->nabmbarh, regno));
219 	case 2:
220 		return (bus_space_read_2(sc->nabmbart, sc->nabmbarh, regno));
221 	case 4:
222 		return (bus_space_read_4(sc->nabmbart, sc->nabmbarh, regno));
223 	default:
224 		return (0xffffffff);
225 	}
226 }
227 
228 static __inline void
229 ich_wr(struct sc_info *sc, int regno, uint32_t data, int size)
230 {
231 	switch (size) {
232 	case 1:
233 		bus_space_write_1(sc->nabmbart, sc->nabmbarh, regno, data);
234 		break;
235 	case 2:
236 		bus_space_write_2(sc->nabmbart, sc->nabmbarh, regno, data);
237 		break;
238 	case 4:
239 		bus_space_write_4(sc->nabmbart, sc->nabmbarh, regno, data);
240 		break;
241 	}
242 }
243 
244 /* ac97 codec */
245 static int
246 ich_waitcd(void *devinfo)
247 {
248 	struct sc_info *sc = (struct sc_info *)devinfo;
249 	uint32_t data;
250 	int i;
251 
252 	for (i = 0; i < ICH_TIMEOUT; i++) {
253 		data = ich_rd(sc, ICH_REG_ACC_SEMA, 1);
254 		if ((data & 0x01) == 0)
255 			return (0);
256 		DELAY(1);
257 	}
258 	if ((sc->flags & ICH_IGNORE_PCR) != 0)
259 		return (0);
260 	device_printf(sc->dev, "CODEC semaphore timeout\n");
261 	return (ETIMEDOUT);
262 }
263 
264 static int
265 ich_rdcd(kobj_t obj, void *devinfo, int regno)
266 {
267 	struct sc_info *sc = (struct sc_info *)devinfo;
268 
269 	regno &= 0xff;
270 	ich_waitcd(sc);
271 
272 	return (bus_space_read_2(sc->nambart, sc->nambarh, regno));
273 }
274 
275 static int
276 ich_wrcd(kobj_t obj, void *devinfo, int regno, uint32_t data)
277 {
278 	struct sc_info *sc = (struct sc_info *)devinfo;
279 
280 	regno &= 0xff;
281 	ich_waitcd(sc);
282 	bus_space_write_2(sc->nambart, sc->nambarh, regno, data);
283 
284 	return (0);
285 }
286 
287 static kobj_method_t ich_ac97_methods[] = {
288 	KOBJMETHOD(ac97_read,		ich_rdcd),
289 	KOBJMETHOD(ac97_write,		ich_wrcd),
290 	KOBJMETHOD_END
291 };
292 AC97_DECLARE(ich_ac97);
293 
294 /* -------------------------------------------------------------------- */
295 /* common routines */
296 
297 static void
298 ich_filldtbl(struct sc_chinfo *ch)
299 {
300 	struct sc_info *sc = ch->parent;
301 	uint32_t base;
302 	int i;
303 
304 	base = sndbuf_getbufaddr(ch->buffer);
305 	if ((ch->blksz * ch->blkcnt) > sndbuf_getmaxsize(ch->buffer))
306 		ch->blksz = sndbuf_getmaxsize(ch->buffer) / ch->blkcnt;
307 	if ((sndbuf_getblksz(ch->buffer) != ch->blksz ||
308 	    sndbuf_getblkcnt(ch->buffer) != ch->blkcnt) &&
309 	    sndbuf_resize(ch->buffer, ch->blkcnt, ch->blksz) != 0)
310 		device_printf(sc->dev, "%s: failed blksz=%u blkcnt=%u\n",
311 		    __func__, ch->blksz, ch->blkcnt);
312 	ch->blksz = sndbuf_getblksz(ch->buffer);
313 
314 	for (i = 0; i < ICH_DTBL_LENGTH; i++) {
315 		ch->dtbl[i].buffer = base + (ch->blksz * (i % ch->blkcnt));
316 		ch->dtbl[i].length = ICH_BDC_IOC
317 				   | (ch->blksz / ch->parent->sample_size);
318 	}
319 }
320 
321 static int
322 ich_resetchan(struct sc_info *sc, int num)
323 {
324 	int i, cr, regbase;
325 
326 	if (num == 0)
327 		regbase = ICH_REG_PO_BASE;
328 	else if (num == 1)
329 		regbase = ICH_REG_PI_BASE;
330 	else if (num == 2)
331 		regbase = ICH_REG_MC_BASE;
332 	else
333 		return (ENXIO);
334 
335 	ich_wr(sc, regbase + ICH_REG_X_CR, 0, 1);
336 #if 1
337 	/* This may result in no sound output on NForce 2 MBs, see PR 73987 */
338 	DELAY(100);
339 #else
340 	(void)ich_rd(sc, regbase + ICH_REG_X_CR, 1);
341 #endif
342 	ich_wr(sc, regbase + ICH_REG_X_CR, ICH_X_CR_RR, 1);
343 	for (i = 0; i < ICH_TIMEOUT; i++) {
344 		cr = ich_rd(sc, regbase + ICH_REG_X_CR, 1);
345 		if (cr == 0)
346 			return (0);
347 		DELAY(1);
348 	}
349 
350 	if (sc->flags & ICH_IGNORE_RESET)
351 		return (0);
352 #if 0
353 	else if (sc->vendor == NVIDIA_VENDORID) {
354 	    	sc->flags |= ICH_IGNORE_RESET;
355 		device_printf(sc->dev, "ignoring reset failure!\n");
356 		return (0);
357 	}
358 #endif
359 
360 	device_printf(sc->dev, "cannot reset channel %d\n", num);
361 	return (ENXIO);
362 }
363 
364 /* -------------------------------------------------------------------- */
365 /* channel interface */
366 
367 static void *
368 ichchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
369 {
370 	struct sc_info *sc = devinfo;
371 	struct sc_chinfo *ch;
372 	unsigned int num;
373 
374 	ICH_LOCK(sc);
375 	num = sc->chnum++;
376 	ch = &sc->ch[num];
377 	ch->num = num;
378 	ch->buffer = b;
379 	ch->channel = c;
380 	ch->parent = sc;
381 	ch->run = 0;
382 	ch->dtbl = sc->dtbl + (ch->num * ICH_DTBL_LENGTH);
383 	ch->desc_addr = sc->desc_addr +
384 	    (ch->num * ICH_DTBL_LENGTH * sizeof(struct ich_desc));
385 	ch->blkcnt = sc->blkcnt;
386 	ch->blksz = sc->bufsz / ch->blkcnt;
387 
388 	switch(ch->num) {
389 	case 0: /* play */
390 		KASSERT(dir == PCMDIR_PLAY, ("wrong direction"));
391 		ch->regbase = ICH_REG_PO_BASE;
392 		ch->spdreg = (sc->hasvra) ? AC97_REGEXT_FDACRATE : 0;
393 		ch->imask = ICH_GLOB_STA_POINT;
394 		break;
395 
396 	case 1: /* record */
397 		KASSERT(dir == PCMDIR_REC, ("wrong direction"));
398 		ch->regbase = ICH_REG_PI_BASE;
399 		ch->spdreg = (sc->hasvra) ? AC97_REGEXT_LADCRATE : 0;
400 		ch->imask = ICH_GLOB_STA_PIINT;
401 		break;
402 
403 	case 2: /* mic */
404 		KASSERT(dir == PCMDIR_REC, ("wrong direction"));
405 		ch->regbase = ICH_REG_MC_BASE;
406 		ch->spdreg = (sc->hasvrm) ? AC97_REGEXT_MADCRATE : 0;
407 		ch->imask = ICH_GLOB_STA_MINT;
408 		break;
409 
410 	default:
411 		return (NULL);
412 	}
413 
414 	if (sc->flags & ICH_FIXED_RATE)
415 		ch->spdreg = 0;
416 
417 	ICH_UNLOCK(sc);
418 	if (sndbuf_alloc(ch->buffer, sc->chan_dmat,
419 	    ((sc->flags & ICH_DMA_NOCACHE) ? BUS_DMA_NOCACHE : 0),
420 	    sc->bufsz) != 0)
421 		return (NULL);
422 
423 	ICH_LOCK(sc);
424 	ich_wr(sc, ch->regbase + ICH_REG_X_BDBAR, (uint32_t)(ch->desc_addr), 4);
425 	ICH_UNLOCK(sc);
426 
427 	return (ch);
428 }
429 
430 static int
431 ichchan_setformat(kobj_t obj, void *data, uint32_t format)
432 {
433 
434 	ICH_DEBUG(
435 		struct sc_chinfo *ch = data;
436 		struct sc_info *sc = ch->parent;
437 		if (!(sc->flags & ICH_CALIBRATE_DONE))
438 			device_printf(sc->dev,
439 			    "WARNING: %s() called before calibration!\n",
440 			    __func__);
441 	);
442 
443 	return (0);
444 }
445 
446 static uint32_t
447 ichchan_setspeed(kobj_t obj, void *data, uint32_t speed)
448 {
449 	struct sc_chinfo *ch = data;
450 	struct sc_info *sc = ch->parent;
451 
452 	ICH_DEBUG(
453 		if (!(sc->flags & ICH_CALIBRATE_DONE))
454 			device_printf(sc->dev,
455 			    "WARNING: %s() called before calibration!\n",
456 			    __func__);
457 	);
458 
459 	if (ch->spdreg) {
460 		int r, ac97rate;
461 
462 		ICH_LOCK(sc);
463 		if (sc->ac97rate <= 32000 || sc->ac97rate >= 64000)
464 			sc->ac97rate = 48000;
465 		ac97rate = sc->ac97rate;
466 		ICH_UNLOCK(sc);
467 		r = (speed * 48000) / ac97rate;
468 		/*
469 		 * Cast the return value of ac97_setrate() to uint64 so that
470 		 * the math don't overflow into the negative range.
471 		 */
472 		ch->spd = ((uint64_t)ac97_setrate(sc->codec, ch->spdreg, r) *
473 				ac97rate) / 48000;
474 	} else {
475 		ch->spd = 48000;
476 	}
477 	return (ch->spd);
478 }
479 
480 static uint32_t
481 ichchan_setblocksize(kobj_t obj, void *data, uint32_t blocksize)
482 {
483 	struct sc_chinfo *ch = data;
484 	struct sc_info *sc = ch->parent;
485 
486 	ICH_DEBUG(
487 		if (!(sc->flags & ICH_CALIBRATE_DONE))
488 			device_printf(sc->dev,
489 			    "WARNING: %s() called before calibration!\n",
490 			    __func__);
491 	);
492 
493 	if (sc->flags & ICH_HIGH_LATENCY)
494 		blocksize = sndbuf_getmaxsize(ch->buffer) / ch->blkcnt;
495 
496 	if (blocksize < ICH_MIN_BLKSZ)
497 		blocksize = ICH_MIN_BLKSZ;
498 	blocksize &= ~(ICH_MIN_BLKSZ - 1);
499 	ch->blksz = blocksize;
500 	ich_filldtbl(ch);
501 	ICH_LOCK(sc);
502 	ich_wr(sc, ch->regbase + ICH_REG_X_LVI, ch->blkcnt - 1, 1);
503 	ICH_UNLOCK(sc);
504 
505 	return (ch->blksz);
506 }
507 
508 static int
509 ichchan_trigger(kobj_t obj, void *data, int go)
510 {
511 	struct sc_chinfo *ch = data;
512 	struct sc_info *sc = ch->parent;
513 
514 	ICH_DEBUG(
515 		if (!(sc->flags & ICH_CALIBRATE_DONE))
516 			device_printf(sc->dev,
517 			    "WARNING: %s() called before calibration!\n",
518 			    __func__);
519 	);
520 
521 	switch (go) {
522 	case PCMTRIG_START:
523 		ch->run = 1;
524 		ICH_LOCK(sc);
525 		ich_wr(sc, ch->regbase + ICH_REG_X_BDBAR, (uint32_t)(ch->desc_addr), 4);
526 		ich_wr(sc, ch->regbase + ICH_REG_X_CR, ICH_X_CR_RPBM | ICH_X_CR_LVBIE | ICH_X_CR_IOCE, 1);
527 		ICH_UNLOCK(sc);
528 		break;
529 	case PCMTRIG_STOP:
530 	case PCMTRIG_ABORT:
531 		ICH_LOCK(sc);
532 		ich_resetchan(sc, ch->num);
533 		ICH_UNLOCK(sc);
534 		ch->run = 0;
535 		break;
536 	default:
537 		break;
538 	}
539 	return (0);
540 }
541 
542 static uint32_t
543 ichchan_getptr(kobj_t obj, void *data)
544 {
545 	struct sc_chinfo *ch = data;
546 	struct sc_info *sc = ch->parent;
547       	uint32_t pos;
548 
549 	ICH_DEBUG(
550 		if (!(sc->flags & ICH_CALIBRATE_DONE))
551 			device_printf(sc->dev,
552 			    "WARNING: %s() called before calibration!\n",
553 			    __func__);
554 	);
555 
556 	ICH_LOCK(sc);
557 	ch->civ = ich_rd(sc, ch->regbase + ICH_REG_X_CIV, 1) % ch->blkcnt;
558 	ICH_UNLOCK(sc);
559 
560 	pos = ch->civ * ch->blksz;
561 
562 	return (pos);
563 }
564 
565 static struct pcmchan_caps *
566 ichchan_getcaps(kobj_t obj, void *data)
567 {
568 	struct sc_chinfo *ch = data;
569 
570 	ICH_DEBUG(
571 		struct sc_info *sc = ch->parent;
572 
573 		if (!(sc->flags & ICH_CALIBRATE_DONE))
574 			device_printf(ch->parent->dev,
575 			    "WARNING: %s() called before calibration!\n",
576 			    __func__);
577 	);
578 
579 	return ((ch->spdreg) ? &ich_vrcaps : &ich_caps);
580 }
581 
582 static kobj_method_t ichchan_methods[] = {
583 	KOBJMETHOD(channel_init,		ichchan_init),
584 	KOBJMETHOD(channel_setformat,		ichchan_setformat),
585 	KOBJMETHOD(channel_setspeed,		ichchan_setspeed),
586 	KOBJMETHOD(channel_setblocksize,	ichchan_setblocksize),
587 	KOBJMETHOD(channel_trigger,		ichchan_trigger),
588 	KOBJMETHOD(channel_getptr,		ichchan_getptr),
589 	KOBJMETHOD(channel_getcaps,		ichchan_getcaps),
590 	KOBJMETHOD_END
591 };
592 CHANNEL_DECLARE(ichchan);
593 
594 /* -------------------------------------------------------------------- */
595 /* The interrupt handler */
596 
597 static void
598 ich_intr(void *p)
599 {
600 	struct sc_info *sc = (struct sc_info *)p;
601 	struct sc_chinfo *ch;
602 	uint32_t cbi, lbi, lvi, st, gs;
603 	int i;
604 
605 	ICH_LOCK(sc);
606 
607 	ICH_DEBUG(
608 		if (!(sc->flags & ICH_CALIBRATE_DONE))
609 			device_printf(sc->dev,
610 			    "WARNING: %s() called before calibration!\n",
611 			    __func__);
612 	);
613 
614 	gs = ich_rd(sc, ICH_REG_GLOB_STA, 4) & ICH_GLOB_STA_IMASK;
615 	if (gs & (ICH_GLOB_STA_PRES | ICH_GLOB_STA_SRES)) {
616 		/* Clear resume interrupt(s) - nothing doing with them */
617 		ich_wr(sc, ICH_REG_GLOB_STA, gs, 4);
618 	}
619 	gs &= ~(ICH_GLOB_STA_PRES | ICH_GLOB_STA_SRES);
620 
621 	for (i = 0; i < 3; i++) {
622 		ch = &sc->ch[i];
623 		if ((ch->imask & gs) == 0)
624 			continue;
625 		gs &= ~ch->imask;
626 		st = ich_rd(sc, ch->regbase +
627 				((sc->swap_reg) ? ICH_REG_X_PICB : ICH_REG_X_SR),
628 			    2);
629 		st &= ICH_X_SR_FIFOE | ICH_X_SR_BCIS | ICH_X_SR_LVBCI;
630 		if (st & (ICH_X_SR_BCIS | ICH_X_SR_LVBCI)) {
631 				/* block complete - update buffer */
632 			if (ch->run) {
633 				ICH_UNLOCK(sc);
634 				chn_intr(ch->channel);
635 				ICH_LOCK(sc);
636 			}
637 			lvi = ich_rd(sc, ch->regbase + ICH_REG_X_LVI, 1);
638 			cbi = ch->civ % ch->blkcnt;
639 			if (cbi == 0)
640 				cbi = ch->blkcnt - 1;
641 			else
642 				cbi--;
643 			lbi = lvi % ch->blkcnt;
644 			if (cbi >= lbi)
645 				lvi += cbi - lbi;
646 			else
647 				lvi += cbi + ch->blkcnt - lbi;
648 			lvi %= ICH_DTBL_LENGTH;
649 			ich_wr(sc, ch->regbase + ICH_REG_X_LVI, lvi, 1);
650 
651 		}
652 		/* clear status bit */
653 		ich_wr(sc, ch->regbase +
654 			   ((sc->swap_reg) ? ICH_REG_X_PICB : ICH_REG_X_SR),
655 		       st, 2);
656 	}
657 	ICH_UNLOCK(sc);
658 	if (gs != 0) {
659 		device_printf(sc->dev,
660 			      "Unhandled interrupt, gs_intr = %x\n", gs);
661 	}
662 }
663 
664 /* ------------------------------------------------------------------------- */
665 /* Sysctl to control ac97 speed (some boards appear to end up using
666  * XTAL_IN rather than BIT_CLK for link timing).
667  */
668 
669 static int
670 ich_initsys(struct sc_info* sc)
671 {
672 	/* XXX: this should move to a device specific sysctl "dev.pcm.X.yyy"
673 	   via device_get_sysctl_*() as discussed on multimedia@ in msg-id
674 	   <861wujij2q.fsf@xps.des.no> */
675 	SYSCTL_ADD_INT(device_get_sysctl_ctx(sc->dev),
676 		       SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)),
677 		       OID_AUTO, "ac97rate", CTLFLAG_RW,
678 		       &sc->ac97rate, 48000,
679 		       "AC97 link rate (default = 48000)");
680 
681 	return (0);
682 }
683 
684 static void
685 ich_setstatus(struct sc_info *sc)
686 {
687 	char status[SND_STATUSLEN];
688 
689 	snprintf(status, SND_STATUSLEN,
690 	    "at io 0x%lx, 0x%lx irq %ld bufsz %u %s",
691 	    rman_get_start(sc->nambar), rman_get_start(sc->nabmbar),
692 	    rman_get_start(sc->irq), sc->bufsz,PCM_KLDSTRING(snd_ich));
693 
694 	if (bootverbose && (sc->flags & ICH_DMA_NOCACHE))
695 		device_printf(sc->dev,
696 		    "PCI Master abort workaround enabled\n");
697 
698 	pcm_setstatus(sc->dev, status);
699 }
700 
701 /* -------------------------------------------------------------------- */
702 /* Calibrate card to determine the clock source.  The source maybe a
703  * function of the ac97 codec initialization code (to be investigated).
704  */
705 
706 static void
707 ich_calibrate(void *arg)
708 {
709 	struct sc_info *sc;
710 	struct sc_chinfo *ch;
711 	struct timeval t1, t2;
712 	uint8_t ociv, nciv;
713 	uint32_t wait_us, actual_48k_rate, oblkcnt;
714 
715 	sc = (struct sc_info *)arg;
716 	ICH_LOCK(sc);
717 	ch = &sc->ch[1];
718 
719 	if (sc->intrhook.ich_func != NULL) {
720 		config_intrhook_disestablish(&sc->intrhook);
721 		sc->intrhook.ich_func = NULL;
722 	}
723 
724 	/*
725 	 * Grab audio from input for fixed interval and compare how
726 	 * much we actually get with what we expect.  Interval needs
727 	 * to be sufficiently short that no interrupts are
728 	 * generated.
729 	 */
730 
731 	KASSERT(ch->regbase == ICH_REG_PI_BASE, ("wrong direction"));
732 
733 	oblkcnt = ch->blkcnt;
734 	ch->blkcnt = 2;
735 	sc->flags |= ICH_CALIBRATE_DONE;
736 	ICH_UNLOCK(sc);
737 	ichchan_setblocksize(0, ch, sndbuf_getmaxsize(ch->buffer) >> 1);
738 	ICH_LOCK(sc);
739 	sc->flags &= ~ICH_CALIBRATE_DONE;
740 
741 	/*
742 	 * our data format is stereo, 16 bit so each sample is 4 bytes.
743 	 * assuming we get 48000 samples per second, we get 192000 bytes/sec.
744 	 * we're going to start recording with interrupts disabled and measure
745 	 * the time taken for one block to complete.  we know the block size,
746 	 * we know the time in microseconds, we calculate the sample rate:
747 	 *
748 	 * actual_rate [bps] = bytes / (time [s] * 4)
749 	 * actual_rate [bps] = (bytes * 1000000) / (time [us] * 4)
750 	 * actual_rate [Hz] = (bytes * 250000) / time [us]
751 	 */
752 
753 	/* prepare */
754 	ociv = ich_rd(sc, ch->regbase + ICH_REG_X_CIV, 1);
755 	nciv = ociv;
756 	ich_wr(sc, ch->regbase + ICH_REG_X_BDBAR, (uint32_t)(ch->desc_addr), 4);
757 
758 	/* start */
759 	microtime(&t1);
760 	ich_wr(sc, ch->regbase + ICH_REG_X_CR, ICH_X_CR_RPBM, 1);
761 
762 	/* wait */
763 	do {
764 		microtime(&t2);
765 		if (t2.tv_sec - t1.tv_sec > 1)
766 			break;
767 		nciv = ich_rd(sc, ch->regbase + ICH_REG_X_CIV, 1);
768 	} while (nciv == ociv);
769 
770 	/* stop */
771 	ich_wr(sc, ch->regbase + ICH_REG_X_CR, 0, 1);
772 
773 	/* reset */
774 	DELAY(100);
775 	ich_wr(sc, ch->regbase + ICH_REG_X_CR, ICH_X_CR_RR, 1);
776 	ch->blkcnt = oblkcnt;
777 
778 	/* turn time delta into us */
779 	wait_us = ((t2.tv_sec - t1.tv_sec) * 1000000) + t2.tv_usec - t1.tv_usec;
780 
781 	if (nciv == ociv) {
782 		device_printf(sc->dev, "ac97 link rate calibration timed out after %d us\n", wait_us);
783 		sc->flags |= ICH_CALIBRATE_DONE;
784 		ICH_UNLOCK(sc);
785 		ich_setstatus(sc);
786 		return;
787 	}
788 
789 	/* Just in case the timecounter screwed. It is possible, really. */
790 	if (wait_us > 0)
791 		actual_48k_rate = ((uint64_t)ch->blksz * 250000) / wait_us;
792 	else
793 		actual_48k_rate = 48000;
794 
795 	if (actual_48k_rate < 47500 || actual_48k_rate > 48500) {
796 		sc->ac97rate = actual_48k_rate;
797 	} else {
798 		sc->ac97rate = 48000;
799 	}
800 
801 	if (bootverbose || sc->ac97rate != 48000) {
802 		device_printf(sc->dev, "measured ac97 link rate at %d Hz", actual_48k_rate);
803 		if (sc->ac97rate != actual_48k_rate)
804 			printf(", will use %d Hz", sc->ac97rate);
805 	 	printf("\n");
806 	}
807 	sc->flags |= ICH_CALIBRATE_DONE;
808 	ICH_UNLOCK(sc);
809 
810 	ich_setstatus(sc);
811 
812 	return;
813 }
814 
815 /* -------------------------------------------------------------------- */
816 /* Probe and attach the card */
817 
818 static void
819 ich_setmap(void *arg, bus_dma_segment_t *segs, int nseg, int error)
820 {
821 	struct sc_info *sc = (struct sc_info *)arg;
822 	sc->desc_addr = segs->ds_addr;
823 	return;
824 }
825 
826 static int
827 ich_init(struct sc_info *sc)
828 {
829 	uint32_t stat;
830 
831 	ich_wr(sc, ICH_REG_GLOB_CNT, ICH_GLOB_CTL_COLD, 4);
832 	DELAY(600000);
833 	stat = ich_rd(sc, ICH_REG_GLOB_STA, 4);
834 
835 	if ((stat & ICH_GLOB_STA_PCR) == 0) {
836 		/* ICH4/ICH5 may fail when busmastering is enabled. Continue */
837 		if (sc->vendor == INTEL_VENDORID && (
838 		    sc->devid == INTEL_82801DB || sc->devid == INTEL_82801EB ||
839 		    sc->devid == INTEL_6300ESB || sc->devid == INTEL_82801FB ||
840 		    sc->devid == INTEL_82801GB)) {
841 			sc->flags |= ICH_IGNORE_PCR;
842 			device_printf(sc->dev, "primary codec not ready!\n");
843 		}
844 	}
845 
846 #if 0
847 	ich_wr(sc, ICH_REG_GLOB_CNT, ICH_GLOB_CTL_COLD | ICH_GLOB_CTL_PRES, 4);
848 #else
849 	ich_wr(sc, ICH_REG_GLOB_CNT, ICH_GLOB_CTL_COLD, 4);
850 #endif
851 
852 	if (ich_resetchan(sc, 0) || ich_resetchan(sc, 1))
853 		return (ENXIO);
854 	if (sc->hasmic && ich_resetchan(sc, 2))
855 		return (ENXIO);
856 
857 	return (0);
858 }
859 
860 static int
861 ich_pci_probe(device_t dev)
862 {
863 	int i;
864 	uint16_t devid, vendor;
865 
866 	vendor = pci_get_vendor(dev);
867 	devid = pci_get_device(dev);
868 	for (i = 0; i < sizeof(ich_devs)/sizeof(ich_devs[0]); i++) {
869 		if (vendor == ich_devs[i].vendor &&
870 				devid == ich_devs[i].devid) {
871 			device_set_desc(dev, ich_devs[i].name);
872 			/* allow a better driver to override us */
873 			if ((ich_devs[i].options & PROBE_LOW) != 0)
874 				return (BUS_PROBE_LOW_PRIORITY);
875 			return (BUS_PROBE_DEFAULT);
876 		}
877 	}
878 	return (ENXIO);
879 }
880 
881 static int
882 ich_pci_attach(device_t dev)
883 {
884 	uint32_t		subdev;
885 	uint16_t		extcaps;
886 	uint16_t		devid, vendor;
887 	struct sc_info 		*sc;
888 	int			i;
889 
890 	sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
891 	sc->ich_lock = snd_mtxcreate(device_get_nameunit(dev), "snd_ich softc");
892 	sc->dev = dev;
893 
894 	vendor = sc->vendor = pci_get_vendor(dev);
895 	devid = sc->devid = pci_get_device(dev);
896 	subdev = (pci_get_subdevice(dev) << 16) | pci_get_subvendor(dev);
897 	/*
898 	 * The SiS 7012 register set isn't quite like the standard ich.
899 	 * There really should be a general "quirks" mechanism.
900 	 */
901 	if (vendor == SIS_VENDORID && devid == SIS_7012) {
902 		sc->swap_reg = 1;
903 		sc->sample_size = 1;
904 	} else {
905 		sc->swap_reg = 0;
906 		sc->sample_size = 2;
907 	}
908 
909 	/*
910 	 * Intel 440MX Errata #36
911 	 * - AC97 Soft Audio and Soft Modem Master Abort Errata
912 	 *
913 	 * http://www.intel.com/design/chipsets/specupdt/245051.htm
914 	 */
915 	if (vendor == INTEL_VENDORID && devid == INTEL_82440MX)
916 		sc->flags |= ICH_DMA_NOCACHE;
917 
918 	/*
919 	 * Enable bus master. On ich4/5 this may prevent the detection of
920 	 * the primary codec becoming ready in ich_init().
921 	 */
922 	pci_enable_busmaster(dev);
923 
924 	/*
925 	 * By default, ich4 has NAMBAR and NABMBAR i/o spaces as
926 	 * read-only.  Need to enable "legacy support", by poking into
927 	 * pci config space.  The driver should use MMBAR and MBBAR,
928 	 * but doing so will mess things up here.  ich4 has enough new
929 	 * features it warrants it's own driver.
930 	 */
931 	if (vendor == INTEL_VENDORID && (devid == INTEL_82801DB ||
932 	    devid == INTEL_82801EB || devid == INTEL_6300ESB ||
933 	    devid == INTEL_82801FB || devid == INTEL_82801GB)) {
934 		sc->nambarid = PCIR_MMBAR;
935 		sc->nabmbarid = PCIR_MBBAR;
936 		sc->regtype = SYS_RES_MEMORY;
937 		pci_write_config(dev, PCIR_ICH_LEGACY, ICH_LEGACY_ENABLE, 1);
938 	} else {
939 		sc->nambarid = PCIR_NAMBAR;
940 		sc->nabmbarid = PCIR_NABMBAR;
941 		sc->regtype = SYS_RES_IOPORT;
942 	}
943 
944 	sc->nambar = bus_alloc_resource_any(dev, sc->regtype,
945 		&sc->nambarid, RF_ACTIVE);
946 	sc->nabmbar = bus_alloc_resource_any(dev, sc->regtype,
947 		&sc->nabmbarid, RF_ACTIVE);
948 
949 	if (!sc->nambar || !sc->nabmbar) {
950 		device_printf(dev, "unable to map IO port space\n");
951 		goto bad;
952 	}
953 
954 	sc->nambart = rman_get_bustag(sc->nambar);
955 	sc->nambarh = rman_get_bushandle(sc->nambar);
956 	sc->nabmbart = rman_get_bustag(sc->nabmbar);
957 	sc->nabmbarh = rman_get_bushandle(sc->nabmbar);
958 
959 	sc->bufsz = pcm_getbuffersize(dev,
960 	    ICH_MIN_BUFSZ, ICH_DEFAULT_BUFSZ, ICH_MAX_BUFSZ);
961 
962 	if (resource_int_value(device_get_name(dev),
963 	    device_get_unit(dev), "blocksize", &i) == 0 && i > 0) {
964 		sc->blkcnt = sc->bufsz / i;
965 		i = 0;
966 		while (sc->blkcnt >> i)
967 			i++;
968 		sc->blkcnt = 1 << (i - 1);
969 		if (sc->blkcnt < ICH_MIN_BLKCNT)
970 			sc->blkcnt = ICH_MIN_BLKCNT;
971 		else if (sc->blkcnt > ICH_MAX_BLKCNT)
972 			sc->blkcnt = ICH_MAX_BLKCNT;
973 	} else
974 		sc->blkcnt = ICH_DEFAULT_BLKCNT;
975 
976 	if (resource_int_value(device_get_name(dev),
977 	    device_get_unit(dev), "highlatency", &i) == 0 && i != 0) {
978 		sc->flags |= ICH_HIGH_LATENCY;
979 		sc->blkcnt = ICH_MIN_BLKCNT;
980 	}
981 
982 	if (resource_int_value(device_get_name(dev),
983 	    device_get_unit(dev), "fixedrate", &i) == 0 && i != 0)
984 		sc->flags |= ICH_FIXED_RATE;
985 
986 	if (resource_int_value(device_get_name(dev),
987 	    device_get_unit(dev), "micchannel_enabled", &i) == 0 && i != 0)
988 		sc->hasmic = 1;
989 
990 	sc->irqid = 0;
991 	sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqid,
992 	    RF_ACTIVE | RF_SHAREABLE);
993 	if (!sc->irq || snd_setup_intr(dev, sc->irq, INTR_MPSAFE, ich_intr,
994 	    sc, &sc->ih)) {
995 		device_printf(dev, "unable to map interrupt\n");
996 		goto bad;
997 	}
998 
999 	if (ich_init(sc)) {
1000 		device_printf(dev, "unable to initialize the card\n");
1001 		goto bad;
1002 	}
1003 
1004 	sc->codec = AC97_CREATE(dev, sc, ich_ac97);
1005 	if (sc->codec == NULL)
1006 		goto bad;
1007 
1008 	/*
1009 	 * Turn on inverted external amplifier sense flags for few
1010 	 * 'special' boards.
1011 	 */
1012 	switch (subdev) {
1013 	case 0x202f161f:	/* Gateway 7326GZ */
1014 	case 0x203a161f:	/* Gateway 4028GZ */
1015 	case 0x203e161f:	/* Gateway 3520GZ/M210 */
1016 	case 0x204c161f:	/* Kvazar-Micro Senator 3592XT */
1017 	case 0x8144104d:	/* Sony VAIO PCG-TR* */
1018 	case 0x8197104d:	/* Sony S1XP */
1019 	case 0x81c0104d:	/* Sony VAIO type T */
1020 	case 0x81c5104d:	/* Sony VAIO VGN B1VP/B1XP */
1021 	case 0x3089103c:	/* Compaq Presario B3800 */
1022 	case 0x309a103c:	/* HP Compaq nx4300 */
1023 	case 0x82131033:	/* NEC VersaPro VJ10F/BH */
1024 	case 0x82be1033:	/* NEC VersaPro VJ12F/CH */
1025 		ac97_setflags(sc->codec, ac97_getflags(sc->codec) | AC97_F_EAPD_INV);
1026 		break;
1027 	default:
1028 		break;
1029 	}
1030 
1031 	mixer_init(dev, ac97_getmixerclass(), sc->codec);
1032 
1033 	/* check and set VRA function */
1034 	extcaps = ac97_getextcaps(sc->codec);
1035 	sc->hasvra = extcaps & AC97_EXTCAP_VRA;
1036 	sc->hasvrm = extcaps & AC97_EXTCAP_VRM;
1037 	sc->hasmic = (sc->hasmic != 0 &&
1038 	    (ac97_getcaps(sc->codec) & AC97_CAP_MICCHANNEL)) ? 1 : 0;
1039 	ac97_setextmode(sc->codec, sc->hasvra | sc->hasvrm);
1040 
1041 	sc->dtbl_size = sizeof(struct ich_desc) * ICH_DTBL_LENGTH *
1042 	    ((sc->hasmic) ? 3 : 2);
1043 
1044 	/* BDL tag */
1045 	if (bus_dma_tag_create(bus_get_dma_tag(dev), 8, 0,
1046 	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
1047 	    sc->dtbl_size, 1, 0x3ffff, 0, NULL, NULL, &sc->dmat) != 0) {
1048 		device_printf(dev, "unable to create dma tag\n");
1049 		goto bad;
1050 	}
1051 
1052 	/* PCM channel tag */
1053 	if (bus_dma_tag_create(bus_get_dma_tag(dev), ICH_MIN_BLKSZ, 0,
1054 	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
1055 	    sc->bufsz, 1, 0x3ffff, 0, NULL, NULL, &sc->chan_dmat) != 0) {
1056 		device_printf(dev, "unable to create dma tag\n");
1057 		goto bad;
1058 	}
1059 
1060 	if (bus_dmamem_alloc(sc->dmat, (void **)&sc->dtbl, BUS_DMA_NOWAIT |
1061 	    ((sc->flags & ICH_DMA_NOCACHE) ? BUS_DMA_NOCACHE : 0),
1062 	    &sc->dtmap))
1063 		goto bad;
1064 
1065 	if (bus_dmamap_load(sc->dmat, sc->dtmap, sc->dtbl, sc->dtbl_size,
1066 	    ich_setmap, sc, 0))
1067 		goto bad;
1068 
1069 	if (pcm_register(dev, sc, 1, (sc->hasmic) ? 2 : 1))
1070 		goto bad;
1071 
1072 	pcm_addchan(dev, PCMDIR_PLAY, &ichchan_class, sc);		/* play */
1073 	pcm_addchan(dev, PCMDIR_REC, &ichchan_class, sc);		/* record */
1074 	if (sc->hasmic)
1075 		pcm_addchan(dev, PCMDIR_REC, &ichchan_class, sc);	/* record mic */
1076 
1077 	if (sc->flags & ICH_FIXED_RATE) {
1078 		sc->flags |= ICH_CALIBRATE_DONE;
1079 		ich_setstatus(sc);
1080 	} else {
1081 		ich_initsys(sc);
1082 
1083 		sc->intrhook.ich_func = ich_calibrate;
1084 		sc->intrhook.ich_arg = sc;
1085 		if (cold == 0 ||
1086 		    config_intrhook_establish(&sc->intrhook) != 0) {
1087 			sc->intrhook.ich_func = NULL;
1088 			ich_calibrate(sc);
1089 		}
1090 	}
1091 
1092 	return (0);
1093 
1094 bad:
1095 	if (sc->codec)
1096 		ac97_destroy(sc->codec);
1097 	if (sc->ih)
1098 		bus_teardown_intr(dev, sc->irq, sc->ih);
1099 	if (sc->irq)
1100 		bus_release_resource(dev, SYS_RES_IRQ, sc->irqid, sc->irq);
1101 	if (sc->nambar)
1102 		bus_release_resource(dev, sc->regtype,
1103 		    sc->nambarid, sc->nambar);
1104 	if (sc->nabmbar)
1105 		bus_release_resource(dev, sc->regtype,
1106 		    sc->nabmbarid, sc->nabmbar);
1107 	if (sc->dtmap)
1108 		bus_dmamap_unload(sc->dmat, sc->dtmap);
1109 	if (sc->dtbl)
1110 		bus_dmamem_free(sc->dmat, sc->dtbl, sc->dtmap);
1111 	if (sc->chan_dmat)
1112 		bus_dma_tag_destroy(sc->chan_dmat);
1113 	if (sc->dmat)
1114 		bus_dma_tag_destroy(sc->dmat);
1115 	if (sc->ich_lock)
1116 		snd_mtxfree(sc->ich_lock);
1117 	free(sc, M_DEVBUF);
1118 	return (ENXIO);
1119 }
1120 
1121 static int
1122 ich_pci_detach(device_t dev)
1123 {
1124 	struct sc_info *sc;
1125 	int r;
1126 
1127 	r = pcm_unregister(dev);
1128 	if (r)
1129 		return (r);
1130 	sc = pcm_getdevinfo(dev);
1131 
1132 	bus_teardown_intr(dev, sc->irq, sc->ih);
1133 	bus_release_resource(dev, SYS_RES_IRQ, sc->irqid, sc->irq);
1134 	bus_release_resource(dev, sc->regtype, sc->nambarid, sc->nambar);
1135 	bus_release_resource(dev, sc->regtype, sc->nabmbarid, sc->nabmbar);
1136 	bus_dmamap_unload(sc->dmat, sc->dtmap);
1137 	bus_dmamem_free(sc->dmat, sc->dtbl, sc->dtmap);
1138 	bus_dma_tag_destroy(sc->chan_dmat);
1139 	bus_dma_tag_destroy(sc->dmat);
1140 	snd_mtxfree(sc->ich_lock);
1141 	free(sc, M_DEVBUF);
1142 	return (0);
1143 }
1144 
1145 static void
1146 ich_pci_codec_reset(struct sc_info *sc)
1147 {
1148 	int i;
1149 	uint32_t control;
1150 
1151 	control = ich_rd(sc, ICH_REG_GLOB_CNT, 4);
1152 	control &= ~(ICH_GLOB_CTL_SHUT);
1153 	control |= (control & ICH_GLOB_CTL_COLD) ?
1154 		    ICH_GLOB_CTL_WARM : ICH_GLOB_CTL_COLD;
1155 	ich_wr(sc, ICH_REG_GLOB_CNT, control, 4);
1156 
1157 	for (i = 500000; i; i--) {
1158 	     	if (ich_rd(sc, ICH_REG_GLOB_STA, 4) & ICH_GLOB_STA_PCR)
1159 			break;		/*		or ICH_SCR? */
1160 		DELAY(1);
1161 	}
1162 
1163 	if (i <= 0)
1164 		printf("%s: time out\n", __func__);
1165 }
1166 
1167 static int
1168 ich_pci_suspend(device_t dev)
1169 {
1170 	struct sc_info *sc;
1171 	int i;
1172 
1173 	sc = pcm_getdevinfo(dev);
1174 	ICH_LOCK(sc);
1175 	for (i = 0 ; i < 3; i++) {
1176 		sc->ch[i].run_save = sc->ch[i].run;
1177 		if (sc->ch[i].run) {
1178 			ICH_UNLOCK(sc);
1179 			ichchan_trigger(0, &sc->ch[i], PCMTRIG_ABORT);
1180 			ICH_LOCK(sc);
1181 		}
1182 	}
1183 	ICH_UNLOCK(sc);
1184 	return (0);
1185 }
1186 
1187 static int
1188 ich_pci_resume(device_t dev)
1189 {
1190 	struct sc_info *sc;
1191 	int i;
1192 
1193 	sc = pcm_getdevinfo(dev);
1194 
1195 	ICH_LOCK(sc);
1196 	/* Reinit audio device */
1197     	if (ich_init(sc) == -1) {
1198 		device_printf(dev, "unable to reinitialize the card\n");
1199 		ICH_UNLOCK(sc);
1200 		return (ENXIO);
1201 	}
1202 	/* Reinit mixer */
1203 	ich_pci_codec_reset(sc);
1204 	ICH_UNLOCK(sc);
1205 	ac97_setextmode(sc->codec, sc->hasvra | sc->hasvrm);
1206     	if (mixer_reinit(dev) == -1) {
1207 		device_printf(dev, "unable to reinitialize the mixer\n");
1208 		return (ENXIO);
1209 	}
1210 	/* Re-start DMA engines */
1211 	for (i = 0 ; i < 3; i++) {
1212 		struct sc_chinfo *ch = &sc->ch[i];
1213 		if (sc->ch[i].run_save) {
1214 			ichchan_setblocksize(0, ch, ch->blksz);
1215 			ichchan_setspeed(0, ch, ch->spd);
1216 			ichchan_trigger(0, ch, PCMTRIG_START);
1217 		}
1218 	}
1219 	return (0);
1220 }
1221 
1222 static device_method_t ich_methods[] = {
1223 	/* Device interface */
1224 	DEVMETHOD(device_probe,		ich_pci_probe),
1225 	DEVMETHOD(device_attach,	ich_pci_attach),
1226 	DEVMETHOD(device_detach,	ich_pci_detach),
1227 	DEVMETHOD(device_suspend, 	ich_pci_suspend),
1228 	DEVMETHOD(device_resume,	ich_pci_resume),
1229 	{ 0, 0 }
1230 };
1231 
1232 static driver_t ich_driver = {
1233 	"pcm",
1234 	ich_methods,
1235 	PCM_SOFTC_SIZE,
1236 };
1237 
1238 DRIVER_MODULE(snd_ich, pci, ich_driver, pcm_devclass, 0, 0);
1239 MODULE_DEPEND(snd_ich, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
1240 MODULE_VERSION(snd_ich, 1);
1241