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auich.c revision 1.85.2.1
      1 /*	$NetBSD: auich.c,v 1.85.2.1 2005/04/29 11:29:05 kent Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000, 2004, 2005 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe and by Charles M. Hannum.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Copyright (c) 2000 Michael Shalayeff
     41  * All rights reserved.
     42  *
     43  * Redistribution and use in source and binary forms, with or without
     44  * modification, are permitted provided that the following conditions
     45  * are met:
     46  * 1. Redistributions of source code must retain the above copyright
     47  *    notice, this list of conditions and the following disclaimer.
     48  * 2. Redistributions in binary form must reproduce the above copyright
     49  *    notice, this list of conditions and the following disclaimer in the
     50  *    documentation and/or other materials provided with the distribution.
     51  * 3. The name of the author may not be used to endorse or promote products
     52  *    derived from this software without specific prior written permission.
     53  *
     54  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     55  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     56  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     57  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
     58  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     59  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     60  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     62  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     63  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     64  * THE POSSIBILITY OF SUCH DAMAGE.
     65  *
     66  *	from OpenBSD: ich.c,v 1.3 2000/08/11 06:17:18 mickey Exp
     67  */
     68 
     69 /*
     70  * Copyright (c) 2000 Katsurajima Naoto <raven (at) katsurajima.seya.yokohama.jp>
     71  * Copyright (c) 2001 Cameron Grant <cg (at) freebsd.org>
     72  * All rights reserved.
     73  *
     74  * Redistribution and use in source and binary forms, with or without
     75  * modification, are permitted provided that the following conditions
     76  * are met:
     77  * 1. Redistributions of source code must retain the above copyright
     78  *    notice, this list of conditions and the following disclaimer.
     79  * 2. Redistributions in binary form must reproduce the above copyright
     80  *    notice, this list of conditions and the following disclaimer in the
     81  *    documentation and/or other materials provided with the distribution.
     82  *
     83  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     84  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     85  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     86  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     87  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     88  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     89  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     90  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHERIN CONTRACT, STRICT
     91  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     92  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THEPOSSIBILITY OF
     93  * SUCH DAMAGE.
     94  *
     95  * auich_calibrate() was from FreeBSD: ich.c,v 1.22 2002/06/27 22:36:01 scottl Exp
     96  */
     97 
     98 
     99 /* #define	AUICH_DEBUG */
    100 /*
    101  * AC'97 audio found on Intel 810/820/440MX chipsets.
    102  *	http://developer.intel.com/design/chipsets/datashts/290655.htm
    103  *	http://developer.intel.com/design/chipsets/manuals/298028.htm
    104  * ICH3:http://www.intel.com/design/chipsets/datashts/290716.htm
    105  * ICH4:http://www.intel.com/design/chipsets/datashts/290744.htm
    106  * ICH5:http://www.intel.com/design/chipsets/datashts/252516.htm
    107  * AMD8111:
    108  *	http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/24674.pdf
    109  *	http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/25720.pdf
    110  *
    111  * TODO:
    112  *	- Add support for the dedicated microphone input.
    113  *
    114  * NOTE:
    115  *      - The 440MX B-stepping at running 100MHz has a hardware erratum.
    116  *        It causes PCI master abort and hangups until cold reboot.
    117  *        http://www.intel.com/design/chipsets/specupdt/245051.htm
    118  */
    119 
    120 #include <sys/cdefs.h>
    121 __KERNEL_RCSID(0, "$NetBSD: auich.c,v 1.85.2.1 2005/04/29 11:29:05 kent Exp $");
    122 
    123 #include <sys/param.h>
    124 #include <sys/systm.h>
    125 #include <sys/kernel.h>
    126 #include <sys/malloc.h>
    127 #include <sys/device.h>
    128 #include <sys/fcntl.h>
    129 #include <sys/proc.h>
    130 #include <sys/sysctl.h>
    131 
    132 #include <uvm/uvm_extern.h>	/* for PAGE_SIZE */
    133 
    134 #include <dev/pci/pcidevs.h>
    135 #include <dev/pci/pcivar.h>
    136 #include <dev/pci/auichreg.h>
    137 
    138 #include <sys/audioio.h>
    139 #include <dev/audio_if.h>
    140 #include <dev/mulaw.h>
    141 #include <dev/auconv.h>
    142 
    143 #include <machine/bus.h>
    144 
    145 #include <dev/ic/ac97reg.h>
    146 #include <dev/ic/ac97var.h>
    147 
    148 struct auich_dma {
    149 	bus_dmamap_t map;
    150 	caddr_t addr;
    151 	bus_dma_segment_t segs[1];
    152 	int nsegs;
    153 	size_t size;
    154 	struct auich_dma *next;
    155 };
    156 
    157 #define	DMAADDR(p)	((p)->map->dm_segs[0].ds_addr)
    158 #define	KERNADDR(p)	((void *)((p)->addr))
    159 
    160 struct auich_cdata {
    161 	struct auich_dmalist ic_dmalist_pcmo[ICH_DMALIST_MAX];
    162 	struct auich_dmalist ic_dmalist_pcmi[ICH_DMALIST_MAX];
    163 	struct auich_dmalist ic_dmalist_mici[ICH_DMALIST_MAX];
    164 };
    165 
    166 #define	ICH_CDOFF(x)		offsetof(struct auich_cdata, x)
    167 #define	ICH_PCMO_OFF(x)		ICH_CDOFF(ic_dmalist_pcmo[(x)])
    168 #define	ICH_PCMI_OFF(x)		ICH_CDOFF(ic_dmalist_pcmi[(x)])
    169 #define	ICH_MICI_OFF(x)		ICH_CDOFF(ic_dmalist_mici[(x)])
    170 
    171 struct auich_softc {
    172 	struct device sc_dev;
    173 	void *sc_ih;
    174 
    175 	struct device *sc_audiodev;
    176 	audio_device_t sc_audev;
    177 
    178 	pci_chipset_tag_t sc_pc;
    179 	pcitag_t sc_pt;
    180 	bus_space_tag_t iot;
    181 	bus_space_handle_t mix_ioh;
    182 	bus_size_t mix_size;
    183 	bus_space_handle_t aud_ioh;
    184 	bus_size_t aud_size;
    185 	bus_dma_tag_t dmat;
    186 
    187 	struct ac97_codec_if *codec_if;
    188 	struct ac97_host_if host_if;
    189 	int sc_codecnum;
    190 	int sc_codectype;
    191 
    192 	/* DMA scatter-gather lists. */
    193 	bus_dmamap_t sc_cddmamap;
    194 #define	sc_cddma	sc_cddmamap->dm_segs[0].ds_addr
    195 
    196 	struct auich_cdata *sc_cdata;
    197 
    198 	struct auich_ring {
    199 		int qptr;
    200 		struct auich_dmalist *dmalist;
    201 
    202 		uint32_t start, p, end;
    203 		int blksize;
    204 
    205 		void (*intr)(void *);
    206 		void *arg;
    207 	} pcmo, pcmi, mici;
    208 
    209 	struct auich_dma *sc_dmas;
    210 
    211 	/* SiS 7012 hack */
    212 	int  sc_sample_shift;
    213 	int  sc_sts_reg;
    214 	/* 440MX workaround */
    215 	int  sc_dmamap_flags;
    216 
    217 	/* Power Management */
    218 	void *sc_powerhook;
    219 	int sc_suspend;
    220 	struct pci_conf_state sc_pciconf;
    221 
    222 	/* sysctl */
    223 	struct sysctllog *sc_log;
    224 	uint32_t sc_ac97_clock;
    225 	int sc_ac97_clock_mib;
    226 
    227 	int	sc_modem_offset;
    228 
    229 #define AUICH_AUDIO_NFORMATS	3
    230 #define AUICH_MODEM_NFORMATS	1
    231 	struct audio_format sc_audio_formats[AUICH_AUDIO_NFORMATS];
    232 	struct audio_format sc_modem_formats[AUICH_MODEM_NFORMATS];
    233 	struct audio_encoding_set *sc_encodings;
    234 };
    235 
    236 /* Debug */
    237 #ifdef AUICH_DEBUG
    238 #define	DPRINTF(l,x)	do { if (auich_debug & (l)) printf x; } while(0)
    239 int auich_debug = 0xfffe;
    240 #define	ICH_DEBUG_CODECIO	0x0001
    241 #define	ICH_DEBUG_DMA		0x0002
    242 #define	ICH_DEBUG_INTR		0x0004
    243 #else
    244 #define	DPRINTF(x,y)	/* nothing */
    245 #endif
    246 
    247 static int	auich_match(struct device *, struct cfdata *, void *);
    248 static void	auich_attach(struct device *, struct device *, void *);
    249 static int	auich_detach(struct device *, int);
    250 static int	auich_activate(struct device *, enum devact);
    251 static int	auich_intr(void *);
    252 
    253 CFATTACH_DECL(auich, sizeof(struct auich_softc),
    254     auich_match, auich_attach, auich_detach, auich_activate);
    255 
    256 static int	auich_query_encoding(void *, struct audio_encoding *);
    257 static int	auich_set_params(void *, int, int, audio_params_t *,
    258 		    audio_params_t *, stream_filter_list_t *,
    259 		    stream_filter_list_t *);
    260 static int	auich_round_blocksize(void *, int, int, const audio_params_t *);
    261 static void	auich_halt_pipe(struct auich_softc *, int);
    262 static int	auich_halt_output(void *);
    263 static int	auich_halt_input(void *);
    264 static int	auich_getdev(void *, struct audio_device *);
    265 static int	auich_set_port(void *, mixer_ctrl_t *);
    266 static int	auich_get_port(void *, mixer_ctrl_t *);
    267 static int	auich_query_devinfo(void *, mixer_devinfo_t *);
    268 static void	*auich_allocm(void *, int, size_t, struct malloc_type *, int);
    269 static void	auich_freem(void *, void *, struct malloc_type *);
    270 static size_t	auich_round_buffersize(void *, int, size_t);
    271 static paddr_t	auich_mappage(void *, void *, off_t, int);
    272 static int	auich_get_props(void *);
    273 static void	auich_trigger_pipe(struct auich_softc *, int, struct auich_ring *);
    274 static void	auich_intr_pipe(struct auich_softc *, int, struct auich_ring *);
    275 static int	auich_trigger_output(void *, void *, void *, int,
    276 		    void (*)(void *), void *, const audio_params_t *);
    277 static int	auich_trigger_input(void *, void *, void *, int,
    278 		    void (*)(void *), void *, const audio_params_t *);
    279 
    280 static int	auich_alloc_cdata(struct auich_softc *);
    281 
    282 static int	auich_allocmem(struct auich_softc *, size_t, size_t,
    283 		    struct auich_dma *);
    284 static int	auich_freemem(struct auich_softc *, struct auich_dma *);
    285 
    286 static void	auich_powerhook(int, void *);
    287 static int	auich_set_rate(struct auich_softc *, int, u_long);
    288 static int	auich_sysctl_verify(SYSCTLFN_ARGS);
    289 static void	auich_finish_attach(struct device *);
    290 static void	auich_calibrate(struct auich_softc *);
    291 static void	auich_clear_cas(struct auich_softc *);
    292 
    293 static int	auich_attach_codec(void *, struct ac97_codec_if *);
    294 static int	auich_read_codec(void *, uint8_t, uint16_t *);
    295 static int	auich_write_codec(void *, uint8_t, uint16_t);
    296 static int	auich_reset_codec(void *);
    297 
    298 const struct audio_hw_if auich_hw_if = {
    299 	NULL,			/* open */
    300 	NULL,			/* close */
    301 	NULL,			/* drain */
    302 	auich_query_encoding,
    303 	auich_set_params,
    304 	auich_round_blocksize,
    305 	NULL,			/* commit_setting */
    306 	NULL,			/* init_output */
    307 	NULL,			/* init_input */
    308 	NULL,			/* start_output */
    309 	NULL,			/* start_input */
    310 	auich_halt_output,
    311 	auich_halt_input,
    312 	NULL,			/* speaker_ctl */
    313 	auich_getdev,
    314 	NULL,			/* getfd */
    315 	auich_set_port,
    316 	auich_get_port,
    317 	auich_query_devinfo,
    318 	auich_allocm,
    319 	auich_freem,
    320 	auich_round_buffersize,
    321 	auich_mappage,
    322 	auich_get_props,
    323 	auich_trigger_output,
    324 	auich_trigger_input,
    325 	NULL,			/* dev_ioctl */
    326 };
    327 
    328 #define AUICH_FORMATS_1CH	0
    329 #define AUICH_FORMATS_4CH	1
    330 #define AUICH_FORMATS_6CH	2
    331 static const struct audio_format auich_audio_formats[AUICH_AUDIO_NFORMATS] = {
    332 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    333 	 2, AUFMT_STEREO, 0, {8000, 48000}},
    334 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    335 	 4, AUFMT_SURROUND4, 0, {8000, 48000}},
    336 	{NULL, AUMODE_PLAY, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    337 	 6, AUFMT_DOLBY_5_1, 0, {8000, 48000}},
    338 };
    339 
    340 static const struct audio_format auich_modem_formats[AUICH_MODEM_NFORMATS] = {
    341 	{NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16,
    342 	 1, AUFMT_MONAURAL, 0, {8000, 16000}},
    343 };
    344 
    345 #define PCI_ID_CODE0(v, p)	PCI_ID_CODE(PCI_VENDOR_##v, PCI_PRODUCT_##v##_##p)
    346 #define PCIID_ICH		PCI_ID_CODE0(INTEL, 82801AA_ACA)
    347 #define PCIID_ICH0		PCI_ID_CODE0(INTEL, 82801AB_ACA)
    348 #define PCIID_ICH2		PCI_ID_CODE0(INTEL, 82801BA_ACA)
    349 #define PCIID_440MX		PCI_ID_CODE0(INTEL, 82440MX_ACA)
    350 #define PCIID_ICH3		PCI_ID_CODE0(INTEL, 82801CA_AC)
    351 #define PCIID_ICH4		PCI_ID_CODE0(INTEL, 82801DB_AC)
    352 #define PCIID_ICH5		PCI_ID_CODE0(INTEL, 82801EB_AC)
    353 #define PCIID_ICH6		PCI_ID_CODE0(INTEL, 82801FB_AC)
    354 #define PCIID_SIS7012		PCI_ID_CODE0(SIS, 7012_AC)
    355 #define PCIID_NFORCE		PCI_ID_CODE0(NVIDIA, NFORCE_MCP_AC)
    356 #define PCIID_NFORCE2		PCI_ID_CODE0(NVIDIA, NFORCE2_MCPT_AC)
    357 #define PCIID_NFORCE2_400	PCI_ID_CODE0(NVIDIA, NFORCE2_400_MCPT_AC)
    358 #define PCIID_NFORCE3		PCI_ID_CODE0(NVIDIA, NFORCE3_MCPT_AC)
    359 #define PCIID_NFORCE3_250	PCI_ID_CODE0(NVIDIA, NFORCE3_250_MCPT_AC)
    360 #define PCIID_NFORCE4		PCI_ID_CODE0(NVIDIA, NFORCE4_AC)
    361 #define PCIID_AMD768		PCI_ID_CODE0(AMD, PBC768_AC)
    362 #define PCIID_AMD8111		PCI_ID_CODE0(AMD, PBC8111_AC)
    363 
    364 #define	PCIID_ICH3MODEM		PCI_ID_CODE0(INTEL, 82801CA_MOD)
    365 #define PCIID_ICH4MODEM		PCI_ID_CODE0(INTEL, 82801DB_MOD)
    366 
    367 struct auich_devtype {
    368 	pcireg_t	id;
    369 	const char	*name;
    370 	const char	*shortname;	/* must be less than 11 characters */
    371 };
    372 
    373 static const struct auich_devtype auich_audio_devices[] = {
    374 	{ PCIID_ICH,	"i82801AA (ICH) AC-97 Audio",	"ICH" },
    375 	{ PCIID_ICH0,	"i82801AB (ICH0) AC-97 Audio",	"ICH0" },
    376 	{ PCIID_ICH2,	"i82801BA (ICH2) AC-97 Audio",	"ICH2" },
    377 	{ PCIID_440MX,	"i82440MX AC-97 Audio",		"440MX" },
    378 	{ PCIID_ICH3,	"i82801CA (ICH3) AC-97 Audio",	"ICH3" },
    379 	{ PCIID_ICH4,	"i82801DB/DBM (ICH4/ICH4M) AC-97 Audio", "ICH4" },
    380 	{ PCIID_ICH5,	"i82801EB (ICH5) AC-97 Audio",	"ICH5" },
    381 	{ PCIID_ICH6,	"i82801FB (ICH6) AC-97 Audio",	"ICH6" },
    382 	{ PCIID_SIS7012, "SiS 7012 AC-97 Audio",	"SiS7012" },
    383 	{ PCIID_NFORCE,	"nForce MCP AC-97 Audio",	"nForce" },
    384 	{ PCIID_NFORCE2, "nForce2 MCP-T AC-97 Audio",	"nForce2" },
    385 	{ PCIID_NFORCE2_400, "nForce2 400 MCP-T AC-97 Audio",	"nForce2" },
    386 	{ PCIID_NFORCE3, "nForce3 MCP-T AC-97 Audio",	"nForce3" },
    387 	{ PCIID_NFORCE3_250, "nForce3 250 MCP-T AC-97 Audio", "nForce3" },
    388 	{ PCIID_NFORCE4, "nForce4 AC-97 Audio",		"nForce4" },
    389 	{ PCIID_AMD768,	"AMD768 AC-97 Audio",		"AMD768" },
    390 	{ PCIID_AMD8111,"AMD8111 AC-97 Audio",		"AMD8111" },
    391 	{ 0,		NULL,				NULL },
    392 };
    393 
    394 static const struct auich_devtype auich_modem_devices[] = {
    395 #ifdef AUICH_ATTACH_MODEM
    396 	{ PCIID_ICH3MODEM, "i82801CA (ICH3) AC-97 Modem", "ICH3MODEM" },
    397 	{ PCIID_ICH4MODEM, "i82801DB (ICH4) AC-97 Modem", "ICH4MODEM" },
    398 #endif
    399 	{ 0,		NULL,				NULL },
    400 };
    401 
    402 static const struct auich_devtype *
    403 auich_lookup(struct pci_attach_args *pa, const struct auich_devtype *auich_devices)
    404 {
    405 	const struct auich_devtype *d;
    406 
    407 	for (d = auich_devices; d->name != NULL; d++) {
    408 		if (pa->pa_id == d->id)
    409 			return d;
    410 	}
    411 
    412 	return NULL;
    413 }
    414 
    415 static int
    416 auich_match(struct device *parent, struct cfdata *match, void *aux)
    417 {
    418 	struct pci_attach_args *pa;
    419 
    420 	pa = aux;
    421 	if (auich_lookup(pa, auich_audio_devices) != NULL)
    422 		return 1;
    423 	if (auich_lookup(pa, auich_modem_devices) != NULL)
    424 		return 1;
    425 
    426 	return 0;
    427 }
    428 
    429 static void
    430 auich_attach(struct device *parent, struct device *self, void *aux)
    431 {
    432 	struct auich_softc *sc;
    433 	struct pci_attach_args *pa;
    434 	pci_intr_handle_t ih;
    435 	pcireg_t v;
    436 	const char *intrstr;
    437 	const struct auich_devtype *d;
    438 	struct sysctlnode *node, *node_ac97clock;
    439 	int err, node_mib, i;
    440 
    441 	sc = (struct auich_softc *)self;
    442 	pa = aux;
    443 
    444 	if ((d = auich_lookup(pa, auich_modem_devices)) != NULL) {
    445 		sc->sc_modem_offset = 0x10;
    446 		sc->sc_codectype = AC97_CODEC_TYPE_MODEM;
    447 	} else if ((d = auich_lookup(pa, auich_audio_devices)) != NULL) {
    448 		sc->sc_modem_offset = 0;
    449 		sc->sc_codectype = AC97_CODEC_TYPE_AUDIO;
    450 	} else
    451 		panic("auich_attach: impossible");
    452 
    453 	if (sc->sc_codectype == AC97_CODEC_TYPE_AUDIO)
    454 		aprint_naive(": Audio controller\n");
    455 	else
    456 		aprint_naive(": Modem controller\n");
    457 
    458 	sc->sc_pc = pa->pa_pc;
    459 	sc->sc_pt = pa->pa_tag;
    460 
    461 	aprint_normal(": %s\n", d->name);
    462 
    463 	if (d->id == PCIID_ICH4 || d->id == PCIID_ICH5 || d->id == PCIID_ICH6
    464 	    || d->id == PCIID_ICH4MODEM) {
    465 		/*
    466 		 * Use native mode for ICH4/ICH5/ICH6
    467 		 */
    468 		if (pci_mapreg_map(pa, ICH_MMBAR, PCI_MAPREG_TYPE_MEM, 0,
    469 				   &sc->iot, &sc->mix_ioh, NULL, &sc->mix_size)) {
    470 			v = pci_conf_read(pa->pa_pc, pa->pa_tag, ICH_CFG);
    471 			pci_conf_write(pa->pa_pc, pa->pa_tag, ICH_CFG,
    472 				       v | ICH_CFG_IOSE);
    473 			if (pci_mapreg_map(pa, ICH_NAMBAR, PCI_MAPREG_TYPE_IO,
    474 					   0, &sc->iot, &sc->mix_ioh, NULL,
    475 					   &sc->mix_size)) {
    476 				aprint_error("%s: can't map codec i/o space\n",
    477 					     sc->sc_dev.dv_xname);
    478 				return;
    479 			}
    480 		}
    481 		if (pci_mapreg_map(pa, ICH_MBBAR, PCI_MAPREG_TYPE_MEM, 0,
    482 				   &sc->iot, &sc->aud_ioh, NULL, &sc->aud_size)) {
    483 			v = pci_conf_read(pa->pa_pc, pa->pa_tag, ICH_CFG);
    484 			pci_conf_write(pa->pa_pc, pa->pa_tag, ICH_CFG,
    485 				       v | ICH_CFG_IOSE);
    486 			if (pci_mapreg_map(pa, ICH_NABMBAR, PCI_MAPREG_TYPE_IO,
    487 					   0, &sc->iot, &sc->aud_ioh, NULL,
    488 					   &sc->aud_size)) {
    489 				aprint_error("%s: can't map device i/o space\n",
    490 					     sc->sc_dev.dv_xname);
    491 				return;
    492 			}
    493 		}
    494 	} else {
    495 		if (pci_mapreg_map(pa, ICH_NAMBAR, PCI_MAPREG_TYPE_IO, 0,
    496 				   &sc->iot, &sc->mix_ioh, NULL, &sc->mix_size)) {
    497 			aprint_error("%s: can't map codec i/o space\n",
    498 				     sc->sc_dev.dv_xname);
    499 			return;
    500 		}
    501 		if (pci_mapreg_map(pa, ICH_NABMBAR, PCI_MAPREG_TYPE_IO, 0,
    502 				   &sc->iot, &sc->aud_ioh, NULL, &sc->aud_size)) {
    503 			aprint_error("%s: can't map device i/o space\n",
    504 				     sc->sc_dev.dv_xname);
    505 			return;
    506 		}
    507 	}
    508 	sc->dmat = pa->pa_dmat;
    509 
    510 	/* enable bus mastering */
    511 	v = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
    512 	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
    513 	    v | PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_BACKTOBACK_ENABLE);
    514 
    515 	/* Map and establish the interrupt. */
    516 	if (pci_intr_map(pa, &ih)) {
    517 		aprint_error("%s: can't map interrupt\n", sc->sc_dev.dv_xname);
    518 		return;
    519 	}
    520 	intrstr = pci_intr_string(pa->pa_pc, ih);
    521 	sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_AUDIO,
    522 	    auich_intr, sc);
    523 	if (sc->sc_ih == NULL) {
    524 		aprint_error("%s: can't establish interrupt",
    525 		    sc->sc_dev.dv_xname);
    526 		if (intrstr != NULL)
    527 			aprint_normal(" at %s", intrstr);
    528 		aprint_normal("\n");
    529 		return;
    530 	}
    531 	aprint_normal("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
    532 
    533 	snprintf(sc->sc_audev.name, MAX_AUDIO_DEV_LEN, "%s AC97", d->shortname);
    534 	snprintf(sc->sc_audev.version, MAX_AUDIO_DEV_LEN,
    535 		 "0x%02x", PCI_REVISION(pa->pa_class));
    536 	strlcpy(sc->sc_audev.config, sc->sc_dev.dv_xname, MAX_AUDIO_DEV_LEN);
    537 
    538 	/* SiS 7012 needs special handling */
    539 	if (d->id == PCIID_SIS7012) {
    540 		sc->sc_sts_reg = ICH_PICB;
    541 		sc->sc_sample_shift = 0;
    542 		/* Un-mute output. From Linux. */
    543 		bus_space_write_4(sc->iot, sc->aud_ioh, ICH_SIS_NV_CTL,
    544 		    bus_space_read_4(sc->iot, sc->aud_ioh, ICH_SIS_NV_CTL) |
    545 		    ICH_SIS_CTL_UNMUTE);
    546 	} else {
    547 		sc->sc_sts_reg = ICH_STS;
    548 		sc->sc_sample_shift = 1;
    549 	}
    550 
    551 	/* Workaround for a 440MX B-stepping erratum */
    552 	sc->sc_dmamap_flags = BUS_DMA_COHERENT;
    553 	if (d->id == PCIID_440MX) {
    554 		sc->sc_dmamap_flags |= BUS_DMA_NOCACHE;
    555 		printf("%s: DMA bug workaround enabled\n", sc->sc_dev.dv_xname);
    556 	}
    557 
    558 	/* Set up DMA lists. */
    559 	sc->pcmo.qptr = sc->pcmi.qptr = sc->mici.qptr = 0;
    560 	auich_alloc_cdata(sc);
    561 
    562 	DPRINTF(ICH_DEBUG_DMA, ("auich_attach: lists %p %p %p\n",
    563 	    sc->pcmo.dmalist, sc->pcmi.dmalist, sc->mici.dmalist));
    564 
    565 	/* Modem codecs are always the secondary codec on ICH */
    566 	sc->sc_codecnum = sc->sc_codectype == AC97_CODEC_TYPE_MODEM ? 1 : 0;
    567 
    568 	sc->host_if.arg = sc;
    569 	sc->host_if.attach = auich_attach_codec;
    570 	sc->host_if.read = auich_read_codec;
    571 	sc->host_if.write = auich_write_codec;
    572 	sc->host_if.reset = auich_reset_codec;
    573 
    574 	if (ac97_attach_type(&sc->host_if, self, sc->sc_codectype) != 0)
    575 		return;
    576 
    577 	/* setup audio_format */
    578 	if (sc->sc_codectype == AC97_CODEC_TYPE_AUDIO) {
    579 		memcpy(sc->sc_audio_formats, auich_audio_formats, sizeof(auich_audio_formats));
    580 		if (!AC97_IS_4CH(sc->codec_if))
    581 			AUFMT_INVALIDATE(&sc->sc_audio_formats[AUICH_FORMATS_4CH]);
    582 		if (!AC97_IS_6CH(sc->codec_if))
    583 			AUFMT_INVALIDATE(&sc->sc_audio_formats[AUICH_FORMATS_6CH]);
    584 		if (AC97_IS_FIXED_RATE(sc->codec_if)) {
    585 			for (i = 0; i < AUICH_AUDIO_NFORMATS; i++) {
    586 				sc->sc_audio_formats[i].frequency_type = 1;
    587 				sc->sc_audio_formats[i].frequency[0] = 48000;
    588 			}
    589 		}
    590 		if (0 != auconv_create_encodings(sc->sc_audio_formats, AUICH_AUDIO_NFORMATS,
    591 						 &sc->sc_encodings))
    592 			return;
    593 	} else {
    594 		memcpy(sc->sc_modem_formats, auich_modem_formats, sizeof(auich_modem_formats));
    595 		if (0 != auconv_create_encodings(sc->sc_modem_formats, AUICH_MODEM_NFORMATS,
    596 						 &sc->sc_encodings))
    597 			return;
    598 	}
    599 
    600 
    601 	/* Watch for power change */
    602 	sc->sc_suspend = PWR_RESUME;
    603 	sc->sc_powerhook = powerhook_establish(auich_powerhook, sc);
    604 
    605 	config_interrupts(self, auich_finish_attach);
    606 
    607 	/* sysctl setup */
    608 	if (AC97_IS_FIXED_RATE(sc->codec_if) &&
    609 	    sc->sc_codectype == AC97_CODEC_TYPE_AUDIO)
    610 		return;
    611 
    612 	err = sysctl_createv(&sc->sc_log, 0, NULL, NULL, 0,
    613 			     CTLTYPE_NODE, "hw", NULL, NULL, 0, NULL, 0,
    614 			     CTL_HW, CTL_EOL);
    615 	if (err != 0)
    616 		goto sysctl_err;
    617 	err = sysctl_createv(&sc->sc_log, 0, NULL, &node, 0,
    618 			     CTLTYPE_NODE, sc->sc_dev.dv_xname, NULL, NULL, 0,
    619 			     NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL);
    620 	if (err != 0)
    621 		goto sysctl_err;
    622 	node_mib = node->sysctl_num;
    623 
    624 	if (!AC97_IS_FIXED_RATE(sc->codec_if)) {
    625 		/* passing the sc address instead of &sc->sc_ac97_clock */
    626 		err = sysctl_createv(&sc->sc_log, 0, NULL, &node_ac97clock,
    627 				     CTLFLAG_READWRITE,
    628 				     CTLTYPE_INT, "ac97rate",
    629 				     SYSCTL_DESCR("AC'97 codec link rate"),
    630 				     auich_sysctl_verify, 0, sc, 0,
    631 				     CTL_HW, node_mib, CTL_CREATE, CTL_EOL);
    632 		if (err != 0)
    633 			goto sysctl_err;
    634 		sc->sc_ac97_clock_mib = node_ac97clock->sysctl_num;
    635 	}
    636 
    637 	return;
    638 
    639  sysctl_err:
    640 	printf("%s: failed to add sysctl nodes. (%d)\n",
    641 	       sc->sc_dev.dv_xname, err);
    642 	return;			/* failure of sysctl is not fatal. */
    643 }
    644 
    645 static int
    646 auich_activate(struct device *self, enum devact act)
    647 {
    648 	struct auich_softc *sc;
    649 	int ret;
    650 
    651 	sc = (struct auich_softc *)self;
    652 	ret = 0;
    653 	switch (act) {
    654 	case DVACT_ACTIVATE:
    655 		return EOPNOTSUPP;
    656 	case DVACT_DEACTIVATE:
    657 		if (sc->sc_audiodev != NULL)
    658 			ret = config_deactivate(sc->sc_audiodev);
    659 		return ret;
    660 	}
    661 	return EOPNOTSUPP;
    662 }
    663 
    664 static int
    665 auich_detach(struct device *self, int flags)
    666 {
    667 	struct auich_softc *sc;
    668 
    669 	sc = (struct auich_softc *)self;
    670 
    671 	/* audio */
    672 	if (sc->sc_audiodev != NULL)
    673 		config_detach(sc->sc_audiodev, flags);
    674 
    675 	/* sysctl */
    676 	sysctl_teardown(&sc->sc_log);
    677 
    678 	/* audio_encoding_set */
    679 	auconv_delete_encodings(sc->sc_encodings);
    680 
    681 	/* ac97 */
    682 	if (sc->codec_if != NULL)
    683 		sc->codec_if->vtbl->detach(sc->codec_if);
    684 
    685 	/* PCI */
    686 	if (sc->sc_ih != NULL)
    687 		pci_intr_disestablish(sc->sc_pc, sc->sc_ih);
    688 	if (sc->mix_size != 0)
    689 		bus_space_unmap(sc->iot, sc->mix_ioh, sc->mix_size);
    690 	if (sc->aud_size != 0)
    691 		bus_space_unmap(sc->iot, sc->aud_ioh, sc->aud_size);
    692 	return 0;
    693 }
    694 
    695 static int
    696 auich_sysctl_verify(SYSCTLFN_ARGS)
    697 {
    698 	int error, tmp;
    699 	struct sysctlnode node;
    700 	struct auich_softc *sc;
    701 
    702 	node = *rnode;
    703 	sc = rnode->sysctl_data;
    704 	if (node.sysctl_num == sc->sc_ac97_clock_mib) {
    705 		tmp = sc->sc_ac97_clock;
    706 		node.sysctl_data = &tmp;
    707 		error = sysctl_lookup(SYSCTLFN_CALL(&node));
    708 		if (error || newp == NULL)
    709 			return error;
    710 
    711 		if (tmp < 48000 || tmp > 96000)
    712 			return EINVAL;
    713 		sc->sc_ac97_clock = tmp;
    714 	}
    715 
    716 	return 0;
    717 }
    718 
    719 static void
    720 auich_finish_attach(struct device *self)
    721 {
    722 	struct auich_softc *sc;
    723 
    724 	sc = (void *)self;
    725 	if (!AC97_IS_FIXED_RATE(sc->codec_if))
    726 		auich_calibrate(sc);
    727 
    728 	sc->sc_audiodev = audio_attach_mi(&auich_hw_if, sc, &sc->sc_dev);
    729 }
    730 
    731 #define ICH_CODECIO_INTERVAL	10
    732 static int
    733 auich_read_codec(void *v, uint8_t reg, uint16_t *val)
    734 {
    735 	struct auich_softc *sc;
    736 	int i;
    737 	uint32_t status;
    738 
    739 	sc = v;
    740 	/* wait for an access semaphore */
    741 	for (i = ICH_SEMATIMO / ICH_CODECIO_INTERVAL; i-- &&
    742 	    bus_space_read_1(sc->iot, sc->aud_ioh,
    743 		ICH_CAS + sc->sc_modem_offset) & 1;
    744 	    DELAY(ICH_CODECIO_INTERVAL));
    745 
    746 	if (i > 0) {
    747 		*val = bus_space_read_2(sc->iot, sc->mix_ioh,
    748 		    reg + (sc->sc_codecnum * ICH_CODEC_OFFSET));
    749 		DPRINTF(ICH_DEBUG_CODECIO,
    750 		    ("auich_read_codec(%x, %x)\n", reg, *val));
    751 		status = bus_space_read_4(sc->iot, sc->aud_ioh,
    752 		    ICH_GSTS + sc->sc_modem_offset);
    753 		if (status & ICH_RCS) {
    754 			bus_space_write_4(sc->iot, sc->aud_ioh,
    755 					  ICH_GSTS + sc->sc_modem_offset,
    756 					  status & ~(ICH_SRI|ICH_PRI|ICH_GSCI));
    757 			*val = 0xffff;
    758 			DPRINTF(ICH_DEBUG_CODECIO,
    759 			    ("%s: read_codec error\n", sc->sc_dev.dv_xname));
    760 			if (reg == AC97_REG_GPIO_STATUS)
    761 				auich_clear_cas(sc);
    762 			return -1;
    763 		}
    764 		if (reg == AC97_REG_GPIO_STATUS)
    765 			auich_clear_cas(sc);
    766 		return 0;
    767 	} else {
    768 		aprint_normal("%s: read_codec timeout\n", sc->sc_dev.dv_xname);
    769 		if (reg == AC97_REG_GPIO_STATUS)
    770 			auich_clear_cas(sc);
    771 		return -1;
    772 	}
    773 }
    774 
    775 static int
    776 auich_write_codec(void *v, uint8_t reg, uint16_t val)
    777 {
    778 	struct auich_softc *sc;
    779 	int i;
    780 
    781 	DPRINTF(ICH_DEBUG_CODECIO, ("auich_write_codec(%x, %x)\n", reg, val));
    782 	sc = v;
    783 	/* wait for an access semaphore */
    784 	for (i = ICH_SEMATIMO / ICH_CODECIO_INTERVAL; i-- &&
    785 	    bus_space_read_1(sc->iot, sc->aud_ioh,
    786 		ICH_CAS + sc->sc_modem_offset) & 1;
    787 	    DELAY(ICH_CODECIO_INTERVAL));
    788 
    789 	if (i > 0) {
    790 		bus_space_write_2(sc->iot, sc->mix_ioh,
    791 		    reg + (sc->sc_codecnum * ICH_CODEC_OFFSET), val);
    792 		return 0;
    793 	} else {
    794 		aprint_normal("%s: write_codec timeout\n", sc->sc_dev.dv_xname);
    795 		return -1;
    796 	}
    797 }
    798 
    799 static int
    800 auich_attach_codec(void *v, struct ac97_codec_if *cif)
    801 {
    802 	struct auich_softc *sc;
    803 
    804 	sc = v;
    805 	sc->codec_if = cif;
    806 
    807 	return 0;
    808 }
    809 
    810 static int
    811 auich_reset_codec(void *v)
    812 {
    813 	struct auich_softc *sc;
    814 	int i;
    815 	uint32_t control, status;
    816 
    817 	sc = v;
    818 	control = bus_space_read_4(sc->iot, sc->aud_ioh,
    819 	    ICH_GCTRL + sc->sc_modem_offset);
    820 	if (sc->sc_codectype == AC97_CODEC_TYPE_AUDIO) {
    821 		control &= ~(ICH_ACLSO | ICH_PCM246_MASK);
    822 	} else {
    823 		control &= ~ICH_ACLSO;
    824 		control |= ICH_GIE;
    825 	}
    826 	control |= (control & ICH_CRESET) ? ICH_WRESET : ICH_CRESET;
    827 	bus_space_write_4(sc->iot, sc->aud_ioh,
    828 	    ICH_GCTRL + sc->sc_modem_offset, control);
    829 
    830 	for (i = 500000; i >= 0; i--) {
    831 		status = bus_space_read_4(sc->iot, sc->aud_ioh,
    832 		    ICH_GSTS + sc->sc_modem_offset);
    833 		if (status & (ICH_PCR | ICH_SCR | ICH_S2CR))
    834 			break;
    835 		DELAY(1);
    836 	}
    837 	if (i <= 0) {
    838 		printf("%s: auich_reset_codec: time out\n", sc->sc_dev.dv_xname);
    839 		return ETIMEDOUT;
    840 	}
    841 #ifdef DEBUG
    842 	if (status & ICH_SCR)
    843 		printf("%s: The 2nd codec is ready.\n",
    844 		       sc->sc_dev.dv_xname);
    845 	if (status & ICH_S2CR)
    846 		printf("%s: The 3rd codec is ready.\n",
    847 		       sc->sc_dev.dv_xname);
    848 #endif
    849 	return 0;
    850 }
    851 
    852 static int
    853 auich_query_encoding(void *v, struct audio_encoding *aep)
    854 {
    855 	struct auich_softc *sc;
    856 
    857 	sc = (struct auich_softc *)v;
    858 	return auconv_query_encoding(sc->sc_encodings, aep);
    859 }
    860 
    861 static int
    862 auich_set_rate(struct auich_softc *sc, int mode, u_long srate)
    863 {
    864 	int ret;
    865 	u_int ratetmp;
    866 
    867 	sc->codec_if->vtbl->set_clock(sc->codec_if, sc->sc_ac97_clock);
    868 	ratetmp = srate;
    869 	if (mode == AUMODE_RECORD)
    870 		return sc->codec_if->vtbl->set_rate(sc->codec_if,
    871 		    AC97_REG_PCM_LR_ADC_RATE, &ratetmp);
    872 	ret = sc->codec_if->vtbl->set_rate(sc->codec_if,
    873 	    AC97_REG_PCM_FRONT_DAC_RATE, &ratetmp);
    874 	if (ret)
    875 		return ret;
    876 	ratetmp = srate;
    877 	ret = sc->codec_if->vtbl->set_rate(sc->codec_if,
    878 	    AC97_REG_PCM_SURR_DAC_RATE, &ratetmp);
    879 	if (ret)
    880 		return ret;
    881 	ratetmp = srate;
    882 	ret = sc->codec_if->vtbl->set_rate(sc->codec_if,
    883 	    AC97_REG_PCM_LFE_DAC_RATE, &ratetmp);
    884 	return ret;
    885 }
    886 
    887 static int
    888 auich_set_params(void *v, int setmode, int usemode, audio_params_t *play,
    889     audio_params_t *rec, stream_filter_list_t *pfil, stream_filter_list_t *rfil)
    890 {
    891 	struct auich_softc *sc;
    892 	audio_params_t *p;
    893 	stream_filter_list_t *fil;
    894 	int mode, index;
    895 	uint32_t control;
    896 
    897 	sc = v;
    898 	for (mode = AUMODE_RECORD; mode != -1;
    899 	     mode = mode == AUMODE_RECORD ? AUMODE_PLAY : -1) {
    900 		if ((setmode & mode) == 0)
    901 			continue;
    902 
    903 		p = mode == AUMODE_PLAY ? play : rec;
    904 		fil = mode == AUMODE_PLAY ? pfil : rfil;
    905 		if (p == NULL)
    906 			continue;
    907 
    908 		if (sc->sc_codectype == AC97_CODEC_TYPE_AUDIO) {
    909 			if (p->sample_rate <  8000 ||
    910 			    p->sample_rate > 48000)
    911 				return EINVAL;
    912 
    913 			index = auconv_set_converter(sc->sc_audio_formats, AUICH_AUDIO_NFORMATS,
    914 						     mode, p, TRUE, fil);
    915 		} else {
    916 			if (p->sample_rate != 8000 && p->sample_rate != 16000)
    917 				return EINVAL;
    918 			index = auconv_set_converter(sc->sc_modem_formats, AUICH_MODEM_NFORMATS,
    919 						     mode, p, TRUE, fil);
    920 		}
    921 		if (index < 0)
    922 			return EINVAL;
    923 		if (fil->req_size > 0)
    924 			p = &fil->filters[0].param;
    925 		/* p represents HW encoding */
    926 		if (sc->sc_codectype == AC97_CODEC_TYPE_AUDIO) {
    927 			if (sc->sc_audio_formats[index].frequency_type != 1
    928 			    && auich_set_rate(sc, mode, p->sample_rate))
    929 				return EINVAL;
    930 		} else {
    931 			if (sc->sc_modem_formats[index].frequency_type != 1
    932 			    && auich_set_rate(sc, mode, p->sample_rate))
    933 				return EINVAL;
    934 			auich_write_codec(sc, AC97_REG_LINE1_RATE,
    935 					  p->sample_rate);
    936 			auich_write_codec(sc, AC97_REG_LINE1_LEVEL, 0);
    937 		}
    938 		if (mode == AUMODE_PLAY &&
    939 		    sc->sc_codectype == AC97_CODEC_TYPE_AUDIO) {
    940 			control = bus_space_read_4(sc->iot, sc->aud_ioh,
    941 			    ICH_GCTRL + sc->sc_modem_offset);
    942 				control &= ~ICH_PCM246_MASK;
    943 			if (p->channels == 4) {
    944 				control |= ICH_PCM4;
    945 			} else if (p->channels == 6) {
    946 				control |= ICH_PCM6;
    947 			}
    948 			bus_space_write_4(sc->iot, sc->aud_ioh,
    949 			    ICH_GCTRL + sc->sc_modem_offset, control);
    950 		}
    951 	}
    952 
    953 	return 0;
    954 }
    955 
    956 static int
    957 auich_round_blocksize(void *v, int blk, int mode, const audio_params_t *param)
    958 {
    959 
    960 	return blk & ~0x3f;		/* keep good alignment */
    961 }
    962 
    963 static void
    964 auich_halt_pipe(struct auich_softc *sc, int pipe)
    965 {
    966 	int i;
    967 	uint32_t status;
    968 
    969 	bus_space_write_1(sc->iot, sc->aud_ioh, pipe + ICH_CTRL, 0);
    970 	for (i = 0; i < 100; i++) {
    971 		status = bus_space_read_4(sc->iot, sc->aud_ioh, pipe + ICH_STS);
    972 		if (status & ICH_DCH)
    973 			break;
    974 		DELAY(1);
    975 	}
    976 	bus_space_write_1(sc->iot, sc->aud_ioh, pipe + ICH_CTRL, ICH_RR);
    977 
    978 #if 1
    979 	if (i > 0)
    980 		printf("auich_halt_pipe: halt took %d cycles\n", i);
    981 #endif
    982 }
    983 
    984 static int
    985 auich_halt_output(void *v)
    986 {
    987 	struct auich_softc *sc;
    988 
    989 	sc = v;
    990 	DPRINTF(ICH_DEBUG_DMA, ("%s: halt_output\n", sc->sc_dev.dv_xname));
    991 
    992 	auich_halt_pipe(sc, ICH_PCMO);
    993 	sc->pcmo.intr = NULL;
    994 
    995 	return 0;
    996 }
    997 
    998 static int
    999 auich_halt_input(void *v)
   1000 {
   1001 	struct auich_softc *sc;
   1002 
   1003 	sc = v;
   1004 	DPRINTF(ICH_DEBUG_DMA, ("%s: halt_input\n", sc->sc_dev.dv_xname));
   1005 
   1006 	auich_halt_pipe(sc, ICH_PCMI);
   1007 	sc->pcmi.intr = NULL;
   1008 
   1009 	return 0;
   1010 }
   1011 
   1012 static int
   1013 auich_getdev(void *v, struct audio_device *adp)
   1014 {
   1015 	struct auich_softc *sc;
   1016 
   1017 	sc = v;
   1018 	*adp = sc->sc_audev;
   1019 	return 0;
   1020 }
   1021 
   1022 static int
   1023 auich_set_port(void *v, mixer_ctrl_t *cp)
   1024 {
   1025 	struct auich_softc *sc;
   1026 
   1027 	sc = v;
   1028 	return sc->codec_if->vtbl->mixer_set_port(sc->codec_if, cp);
   1029 }
   1030 
   1031 static int
   1032 auich_get_port(void *v, mixer_ctrl_t *cp)
   1033 {
   1034 	struct auich_softc *sc;
   1035 
   1036 	sc = v;
   1037 	return sc->codec_if->vtbl->mixer_get_port(sc->codec_if, cp);
   1038 }
   1039 
   1040 static int
   1041 auich_query_devinfo(void *v, mixer_devinfo_t *dp)
   1042 {
   1043 	struct auich_softc *sc;
   1044 
   1045 	sc = v;
   1046 	return sc->codec_if->vtbl->query_devinfo(sc->codec_if, dp);
   1047 }
   1048 
   1049 static void *
   1050 auich_allocm(void *v, int direction, size_t size, struct malloc_type *pool,
   1051     int flags)
   1052 {
   1053 	struct auich_softc *sc;
   1054 	struct auich_dma *p;
   1055 	int error;
   1056 
   1057 	if (size > (ICH_DMALIST_MAX * ICH_DMASEG_MAX))
   1058 		return NULL;
   1059 
   1060 	p = malloc(sizeof(*p), pool, flags|M_ZERO);
   1061 	if (p == NULL)
   1062 		return NULL;
   1063 
   1064 	sc = v;
   1065 	error = auich_allocmem(sc, size, 0, p);
   1066 	if (error) {
   1067 		free(p, pool);
   1068 		return NULL;
   1069 	}
   1070 
   1071 	p->next = sc->sc_dmas;
   1072 	sc->sc_dmas = p;
   1073 
   1074 	return KERNADDR(p);
   1075 }
   1076 
   1077 static void
   1078 auich_freem(void *v, void *ptr, struct malloc_type *pool)
   1079 {
   1080 	struct auich_softc *sc;
   1081 	struct auich_dma *p, **pp;
   1082 
   1083 	sc = v;
   1084 	for (pp = &sc->sc_dmas; (p = *pp) != NULL; pp = &p->next) {
   1085 		if (KERNADDR(p) == ptr) {
   1086 			auich_freemem(sc, p);
   1087 			*pp = p->next;
   1088 			free(p, pool);
   1089 			return;
   1090 		}
   1091 	}
   1092 }
   1093 
   1094 static size_t
   1095 auich_round_buffersize(void *v, int direction, size_t size)
   1096 {
   1097 
   1098 	if (size > (ICH_DMALIST_MAX * ICH_DMASEG_MAX))
   1099 		size = ICH_DMALIST_MAX * ICH_DMASEG_MAX;
   1100 
   1101 	return size;
   1102 }
   1103 
   1104 static paddr_t
   1105 auich_mappage(void *v, void *mem, off_t off, int prot)
   1106 {
   1107 	struct auich_softc *sc;
   1108 	struct auich_dma *p;
   1109 
   1110 	if (off < 0)
   1111 		return -1;
   1112 	sc = v;
   1113 	for (p = sc->sc_dmas; p && KERNADDR(p) != mem; p = p->next)
   1114 		continue;
   1115 	if (!p)
   1116 		return -1;
   1117 	return bus_dmamem_mmap(sc->dmat, p->segs, p->nsegs,
   1118 	    off, prot, BUS_DMA_WAITOK);
   1119 }
   1120 
   1121 static int
   1122 auich_get_props(void *v)
   1123 {
   1124 	struct auich_softc *sc;
   1125 	int props;
   1126 
   1127 	props = AUDIO_PROP_INDEPENDENT | AUDIO_PROP_FULLDUPLEX;
   1128 	sc = v;
   1129 	/*
   1130 	 * Even if the codec is fixed-rate, set_param() succeeds for any sample
   1131 	 * rate because of aurateconv.  Applications can't know what rate the
   1132 	 * device can process in the case of mmap().
   1133 	 */
   1134 	if (!AC97_IS_FIXED_RATE(sc->codec_if) ||
   1135 	    sc->sc_codectype == AC97_CODEC_TYPE_MODEM)
   1136 		props |= AUDIO_PROP_MMAP;
   1137 	return props;
   1138 }
   1139 
   1140 static int
   1141 auich_intr(void *v)
   1142 {
   1143 	struct auich_softc *sc;
   1144 	int ret, gsts;
   1145 #ifdef DIAGNOSTIC
   1146 	int csts;
   1147 #endif
   1148 
   1149 	sc = v;
   1150 	ret = 0;
   1151 #ifdef DIAGNOSTIC
   1152 	csts = pci_conf_read(sc->sc_pc, sc->sc_pt, PCI_COMMAND_STATUS_REG);
   1153 	if (csts & PCI_STATUS_MASTER_ABORT) {
   1154 		printf("auich_intr: PCI master abort\n");
   1155 	}
   1156 #endif
   1157 
   1158 	gsts = bus_space_read_4(sc->iot, sc->aud_ioh,
   1159 	    ICH_GSTS + sc->sc_modem_offset);
   1160 	DPRINTF(ICH_DEBUG_INTR, ("auich_intr: gsts=0x%x\n", gsts));
   1161 
   1162 	if ((sc->sc_codectype == AC97_CODEC_TYPE_AUDIO && gsts & ICH_POINT) ||
   1163 	    (sc->sc_codectype == AC97_CODEC_TYPE_MODEM && gsts & ICH_MOINT)) {
   1164 		int sts;
   1165 
   1166 		sts = bus_space_read_2(sc->iot, sc->aud_ioh,
   1167 		    ICH_PCMO + sc->sc_sts_reg);
   1168 		DPRINTF(ICH_DEBUG_INTR,
   1169 		    ("auich_intr: osts=0x%x\n", sts));
   1170 
   1171 		if (sts & ICH_FIFOE)
   1172 			printf("%s: fifo underrun\n", sc->sc_dev.dv_xname);
   1173 
   1174 		if (sts & ICH_BCIS)
   1175 			auich_intr_pipe(sc, ICH_PCMO, &sc->pcmo);
   1176 
   1177 		/* int ack */
   1178 		bus_space_write_2(sc->iot, sc->aud_ioh, ICH_PCMO +
   1179 		    sc->sc_sts_reg, sts & (ICH_BCIS | ICH_FIFOE));
   1180 		if (sc->sc_codectype == AC97_CODEC_TYPE_AUDIO)
   1181 			bus_space_write_4(sc->iot, sc->aud_ioh,
   1182 			    ICH_GSTS + sc->sc_modem_offset, ICH_POINT);
   1183 		else
   1184 			bus_space_write_4(sc->iot, sc->aud_ioh,
   1185 			    ICH_GSTS + sc->sc_modem_offset, ICH_MOINT);
   1186 		ret++;
   1187 	}
   1188 
   1189 	if ((sc->sc_codectype == AC97_CODEC_TYPE_AUDIO && gsts & ICH_PIINT) ||
   1190 	    (sc->sc_codectype == AC97_CODEC_TYPE_MODEM && gsts & ICH_MIINT)) {
   1191 		int sts;
   1192 
   1193 		sts = bus_space_read_2(sc->iot, sc->aud_ioh,
   1194 		    ICH_PCMI + sc->sc_sts_reg);
   1195 		DPRINTF(ICH_DEBUG_INTR,
   1196 		    ("auich_intr: ists=0x%x\n", sts));
   1197 
   1198 		if (sts & ICH_FIFOE)
   1199 			printf("%s: fifo overrun\n", sc->sc_dev.dv_xname);
   1200 
   1201 		if (sts & ICH_BCIS)
   1202 			auich_intr_pipe(sc, ICH_PCMI, &sc->pcmi);
   1203 
   1204 		/* int ack */
   1205 		bus_space_write_2(sc->iot, sc->aud_ioh, ICH_PCMI +
   1206 		    sc->sc_sts_reg, sts & (ICH_BCIS | ICH_FIFOE));
   1207 		if (sc->sc_codectype == AC97_CODEC_TYPE_AUDIO)
   1208 			bus_space_write_4(sc->iot, sc->aud_ioh,
   1209 			    ICH_GSTS + sc->sc_modem_offset, ICH_PIINT);
   1210 		else
   1211 			bus_space_write_4(sc->iot, sc->aud_ioh,
   1212 			    ICH_GSTS + sc->sc_modem_offset, ICH_MIINT);
   1213 		ret++;
   1214 	}
   1215 
   1216 	if (sc->sc_codectype == AC97_CODEC_TYPE_AUDIO && gsts & ICH_MINT) {
   1217 		int sts;
   1218 
   1219 		sts = bus_space_read_2(sc->iot, sc->aud_ioh,
   1220 		    ICH_MICI + sc->sc_sts_reg);
   1221 		DPRINTF(ICH_DEBUG_INTR,
   1222 		    ("auich_intr: ists=0x%x\n", sts));
   1223 
   1224 		if (sts & ICH_FIFOE)
   1225 			printf("%s: fifo overrun\n", sc->sc_dev.dv_xname);
   1226 
   1227 		if (sts & ICH_BCIS)
   1228 			auich_intr_pipe(sc, ICH_MICI, &sc->mici);
   1229 
   1230 		/* int ack */
   1231 		bus_space_write_2(sc->iot, sc->aud_ioh, ICH_MICI +
   1232 		    sc->sc_sts_reg, sts & (ICH_BCIS | ICH_FIFOE));
   1233 		bus_space_write_4(sc->iot, sc->aud_ioh,
   1234 		    ICH_GSTS + sc->sc_modem_offset, ICH_MINT);
   1235 		ret++;
   1236 	}
   1237 
   1238 #ifdef AUICH_MODEM_DEBUG
   1239 	if (sc->sc_codectype == AC97_CODEC_TYPE_MODEM && gsts & ICH_GSCI) {
   1240 		printf("%s: gsts=0x%x\n", sc->sc_dev.dv_xname, gsts);
   1241 		/* int ack */
   1242 		bus_space_write_4(sc->iot, sc->aud_ioh,
   1243 		    ICH_GSTS + sc->sc_modem_offset, ICH_GSCI);
   1244 		ret++;
   1245 	}
   1246 #endif
   1247 
   1248 	return ret;
   1249 }
   1250 
   1251 static void
   1252 auich_trigger_pipe(struct auich_softc *sc, int pipe, struct auich_ring *ring)
   1253 {
   1254 	int blksize, qptr;
   1255 	struct auich_dmalist *q;
   1256 
   1257 	blksize = ring->blksize;
   1258 
   1259 	for (qptr = 0; qptr < ICH_DMALIST_MAX; qptr++) {
   1260 		q = &ring->dmalist[qptr];
   1261 		q->base = ring->p;
   1262 		q->len = (blksize >> sc->sc_sample_shift) | ICH_DMAF_IOC;
   1263 
   1264 		ring->p += blksize;
   1265 		if (ring->p >= ring->end)
   1266 			ring->p = ring->start;
   1267 	}
   1268 	ring->qptr = 0;
   1269 
   1270 	bus_space_write_1(sc->iot, sc->aud_ioh, pipe + ICH_LVI,
   1271 	    (qptr - 1) & ICH_LVI_MASK);
   1272 	bus_space_write_1(sc->iot, sc->aud_ioh, pipe + ICH_CTRL,
   1273 	    ICH_IOCE | ICH_FEIE | ICH_RPBM);
   1274 }
   1275 
   1276 static void
   1277 auich_intr_pipe(struct auich_softc *sc, int pipe, struct auich_ring *ring)
   1278 {
   1279 	int blksize, qptr, nqptr;
   1280 	struct auich_dmalist *q;
   1281 
   1282 	blksize = ring->blksize;
   1283 	qptr = ring->qptr;
   1284 	nqptr = bus_space_read_1(sc->iot, sc->aud_ioh, pipe + ICH_CIV);
   1285 
   1286 	while (qptr != nqptr) {
   1287 		q = &ring->dmalist[qptr];
   1288 		q->base = ring->p;
   1289 		q->len = (blksize >> sc->sc_sample_shift) | ICH_DMAF_IOC;
   1290 
   1291 		DPRINTF(ICH_DEBUG_INTR,
   1292 		    ("auich_intr: %p, %p = %x @ 0x%x\n",
   1293 		    &ring->dmalist[qptr], q, q->len, q->base));
   1294 
   1295 		ring->p += blksize;
   1296 		if (ring->p >= ring->end)
   1297 			ring->p = ring->start;
   1298 
   1299 		qptr = (qptr + 1) & ICH_LVI_MASK;
   1300 		if (ring->intr)
   1301 			ring->intr(ring->arg);
   1302 	}
   1303 	ring->qptr = qptr;
   1304 
   1305 	bus_space_write_1(sc->iot, sc->aud_ioh, pipe + ICH_LVI,
   1306 	    (qptr - 1) & ICH_LVI_MASK);
   1307 }
   1308 
   1309 static int
   1310 auich_trigger_output(void *v, void *start, void *end, int blksize,
   1311     void (*intr)(void *), void *arg, const audio_params_t *param)
   1312 {
   1313 	struct auich_softc *sc;
   1314 	struct auich_dma *p;
   1315 	size_t size;
   1316 
   1317 	DPRINTF(ICH_DEBUG_DMA,
   1318 	    ("auich_trigger_output(%p, %p, %d, %p, %p, %p)\n",
   1319 	    start, end, blksize, intr, arg, param));
   1320 	sc = v;
   1321 
   1322 	for (p = sc->sc_dmas; p && KERNADDR(p) != start; p = p->next)
   1323 		continue;
   1324 	if (!p) {
   1325 		printf("auich_trigger_output: bad addr %p\n", start);
   1326 		return EINVAL;
   1327 	}
   1328 
   1329 	size = (size_t)((caddr_t)end - (caddr_t)start);
   1330 
   1331 	sc->pcmo.intr = intr;
   1332 	sc->pcmo.arg = arg;
   1333 	sc->pcmo.start = DMAADDR(p);
   1334 	sc->pcmo.p = sc->pcmo.start;
   1335 	sc->pcmo.end = sc->pcmo.start + size;
   1336 	sc->pcmo.blksize = blksize;
   1337 
   1338 	bus_space_write_4(sc->iot, sc->aud_ioh, ICH_PCMO + ICH_BDBAR,
   1339 	    sc->sc_cddma + ICH_PCMO_OFF(0));
   1340 	auich_trigger_pipe(sc, ICH_PCMO, &sc->pcmo);
   1341 
   1342 	return 0;
   1343 }
   1344 
   1345 static int
   1346 auich_trigger_input(void *v, void *start, void *end, int blksize,
   1347     void (*intr)(void *), void *arg, const audio_params_t *param)
   1348 {
   1349 	struct auich_softc *sc;
   1350 	struct auich_dma *p;
   1351 	size_t size;
   1352 
   1353 	DPRINTF(ICH_DEBUG_DMA,
   1354 	    ("auich_trigger_input(%p, %p, %d, %p, %p, %p)\n",
   1355 	    start, end, blksize, intr, arg, param));
   1356 	sc = v;
   1357 
   1358 	for (p = sc->sc_dmas; p && KERNADDR(p) != start; p = p->next)
   1359 		continue;
   1360 	if (!p) {
   1361 		printf("auich_trigger_input: bad addr %p\n", start);
   1362 		return EINVAL;
   1363 	}
   1364 
   1365 	size = (size_t)((caddr_t)end - (caddr_t)start);
   1366 
   1367 	sc->pcmi.intr = intr;
   1368 	sc->pcmi.arg = arg;
   1369 	sc->pcmi.start = DMAADDR(p);
   1370 	sc->pcmi.p = sc->pcmi.start;
   1371 	sc->pcmi.end = sc->pcmi.start + size;
   1372 	sc->pcmi.blksize = blksize;
   1373 
   1374 	bus_space_write_4(sc->iot, sc->aud_ioh, ICH_PCMI + ICH_BDBAR,
   1375 	    sc->sc_cddma + ICH_PCMI_OFF(0));
   1376 	auich_trigger_pipe(sc, ICH_PCMI, &sc->pcmi);
   1377 
   1378 	return 0;
   1379 }
   1380 
   1381 static int
   1382 auich_allocmem(struct auich_softc *sc, size_t size, size_t align,
   1383     struct auich_dma *p)
   1384 {
   1385 	int error;
   1386 
   1387 	p->size = size;
   1388 	error = bus_dmamem_alloc(sc->dmat, p->size, align, 0,
   1389 				 p->segs, sizeof(p->segs)/sizeof(p->segs[0]),
   1390 				 &p->nsegs, BUS_DMA_NOWAIT);
   1391 	if (error)
   1392 		return error;
   1393 
   1394 	error = bus_dmamem_map(sc->dmat, p->segs, p->nsegs, p->size,
   1395 			       &p->addr, BUS_DMA_NOWAIT|sc->sc_dmamap_flags);
   1396 	if (error)
   1397 		goto free;
   1398 
   1399 	error = bus_dmamap_create(sc->dmat, p->size, 1, p->size,
   1400 				  0, BUS_DMA_NOWAIT, &p->map);
   1401 	if (error)
   1402 		goto unmap;
   1403 
   1404 	error = bus_dmamap_load(sc->dmat, p->map, p->addr, p->size, NULL,
   1405 				BUS_DMA_NOWAIT);
   1406 	if (error)
   1407 		goto destroy;
   1408 	return 0;
   1409 
   1410  destroy:
   1411 	bus_dmamap_destroy(sc->dmat, p->map);
   1412  unmap:
   1413 	bus_dmamem_unmap(sc->dmat, p->addr, p->size);
   1414  free:
   1415 	bus_dmamem_free(sc->dmat, p->segs, p->nsegs);
   1416 	return error;
   1417 }
   1418 
   1419 static int
   1420 auich_freemem(struct auich_softc *sc, struct auich_dma *p)
   1421 {
   1422 
   1423 	bus_dmamap_unload(sc->dmat, p->map);
   1424 	bus_dmamap_destroy(sc->dmat, p->map);
   1425 	bus_dmamem_unmap(sc->dmat, p->addr, p->size);
   1426 	bus_dmamem_free(sc->dmat, p->segs, p->nsegs);
   1427 	return 0;
   1428 }
   1429 
   1430 static int
   1431 auich_alloc_cdata(struct auich_softc *sc)
   1432 {
   1433 	bus_dma_segment_t seg;
   1434 	int error, rseg;
   1435 
   1436 	/*
   1437 	 * Allocate the control data structure, and create and load the
   1438 	 * DMA map for it.
   1439 	 */
   1440 	if ((error = bus_dmamem_alloc(sc->dmat,
   1441 				      sizeof(struct auich_cdata),
   1442 				      PAGE_SIZE, 0, &seg, 1, &rseg, 0)) != 0) {
   1443 		printf("%s: unable to allocate control data, error = %d\n",
   1444 		    sc->sc_dev.dv_xname, error);
   1445 		goto fail_0;
   1446 	}
   1447 
   1448 	if ((error = bus_dmamem_map(sc->dmat, &seg, rseg,
   1449 				    sizeof(struct auich_cdata),
   1450 				    (caddr_t *) &sc->sc_cdata,
   1451 				    sc->sc_dmamap_flags)) != 0) {
   1452 		printf("%s: unable to map control data, error = %d\n",
   1453 		    sc->sc_dev.dv_xname, error);
   1454 		goto fail_1;
   1455 	}
   1456 
   1457 	if ((error = bus_dmamap_create(sc->dmat, sizeof(struct auich_cdata), 1,
   1458 				       sizeof(struct auich_cdata), 0, 0,
   1459 				       &sc->sc_cddmamap)) != 0) {
   1460 		printf("%s: unable to create control data DMA map, "
   1461 		    "error = %d\n", sc->sc_dev.dv_xname, error);
   1462 		goto fail_2;
   1463 	}
   1464 
   1465 	if ((error = bus_dmamap_load(sc->dmat, sc->sc_cddmamap,
   1466 				     sc->sc_cdata, sizeof(struct auich_cdata),
   1467 				     NULL, 0)) != 0) {
   1468 		printf("%s: unable tp load control data DMA map, "
   1469 		    "error = %d\n", sc->sc_dev.dv_xname, error);
   1470 		goto fail_3;
   1471 	}
   1472 
   1473 	sc->pcmo.dmalist = sc->sc_cdata->ic_dmalist_pcmo;
   1474 	sc->pcmi.dmalist = sc->sc_cdata->ic_dmalist_pcmi;
   1475 	sc->mici.dmalist = sc->sc_cdata->ic_dmalist_mici;
   1476 
   1477 	return 0;
   1478 
   1479  fail_3:
   1480 	bus_dmamap_destroy(sc->dmat, sc->sc_cddmamap);
   1481  fail_2:
   1482 	bus_dmamem_unmap(sc->dmat, (caddr_t) sc->sc_cdata,
   1483 	    sizeof(struct auich_cdata));
   1484  fail_1:
   1485 	bus_dmamem_free(sc->dmat, &seg, rseg);
   1486  fail_0:
   1487 	return error;
   1488 }
   1489 
   1490 static void
   1491 auich_powerhook(int why, void *addr)
   1492 {
   1493 	struct auich_softc *sc;
   1494 
   1495 	sc = (struct auich_softc *)addr;
   1496 	switch (why) {
   1497 	case PWR_SUSPEND:
   1498 	case PWR_STANDBY:
   1499 		/* Power down */
   1500 		DPRINTF(1, ("%s: power down\n", sc->sc_dev.dv_xname));
   1501 		sc->sc_suspend = why;
   1502 		pci_conf_capture(sc->sc_pc, sc->sc_pt, &sc->sc_pciconf);
   1503 		break;
   1504 
   1505 	case PWR_RESUME:
   1506 		/* Wake up */
   1507 		DPRINTF(1, ("%s: power resume\n", sc->sc_dev.dv_xname));
   1508 		if (sc->sc_suspend == PWR_RESUME) {
   1509 			printf("%s: resume without suspend.\n",
   1510 			    sc->sc_dev.dv_xname);
   1511 			sc->sc_suspend = why;
   1512 			return;
   1513 		}
   1514 		pci_conf_restore(sc->sc_pc, sc->sc_pt, &sc->sc_pciconf);
   1515 		sc->sc_suspend = why;
   1516 		auich_reset_codec(sc);
   1517 		DELAY(1000);
   1518 		(sc->codec_if->vtbl->restore_ports)(sc->codec_if);
   1519 		break;
   1520 
   1521 	case PWR_SOFTSUSPEND:
   1522 	case PWR_SOFTSTANDBY:
   1523 	case PWR_SOFTRESUME:
   1524 		break;
   1525 	}
   1526 }
   1527 
   1528 /*
   1529  * Calibrate card (some boards are overclocked and need scaling)
   1530  */
   1531 static void
   1532 auich_calibrate(struct auich_softc *sc)
   1533 {
   1534 	struct timeval t1, t2;
   1535 	uint8_t ociv, nciv;
   1536 	uint64_t wait_us;
   1537 	uint32_t actual_48k_rate, bytes, ac97rate;
   1538 	void *temp_buffer;
   1539 	struct auich_dma *p;
   1540 	u_int rate;
   1541 
   1542 	/*
   1543 	 * Grab audio from input for fixed interval and compare how
   1544 	 * much we actually get with what we expect.  Interval needs
   1545 	 * to be sufficiently short that no interrupts are
   1546 	 * generated.
   1547 	 */
   1548 
   1549 	/* Force the codec to a known state first. */
   1550 	sc->codec_if->vtbl->set_clock(sc->codec_if, 48000);
   1551 	rate = sc->sc_ac97_clock = 48000;
   1552 	sc->codec_if->vtbl->set_rate(sc->codec_if, AC97_REG_PCM_LR_ADC_RATE,
   1553 	    &rate);
   1554 
   1555 	/* Setup a buffer */
   1556 	bytes = 64000;
   1557 	temp_buffer = auich_allocm(sc, AUMODE_RECORD, bytes, M_DEVBUF, M_WAITOK);
   1558 
   1559 	for (p = sc->sc_dmas; p && KERNADDR(p) != temp_buffer; p = p->next)
   1560 		continue;
   1561 	if (p == NULL) {
   1562 		printf("auich_calibrate: bad address %p\n", temp_buffer);
   1563 		return;
   1564 	}
   1565 	sc->pcmi.dmalist[0].base = DMAADDR(p);
   1566 	sc->pcmi.dmalist[0].len = (bytes >> sc->sc_sample_shift);
   1567 
   1568 	/*
   1569 	 * our data format is stereo, 16 bit so each sample is 4 bytes.
   1570 	 * assuming we get 48000 samples per second, we get 192000 bytes/sec.
   1571 	 * we're going to start recording with interrupts disabled and measure
   1572 	 * the time taken for one block to complete.  we know the block size,
   1573 	 * we know the time in microseconds, we calculate the sample rate:
   1574 	 *
   1575 	 * actual_rate [bps] = bytes / (time [s] * 4)
   1576 	 * actual_rate [bps] = (bytes * 1000000) / (time [us] * 4)
   1577 	 * actual_rate [Hz] = (bytes * 250000) / time [us]
   1578 	 */
   1579 
   1580 	/* prepare */
   1581 	ociv = bus_space_read_1(sc->iot, sc->aud_ioh, ICH_PCMI + ICH_CIV);
   1582 	bus_space_write_4(sc->iot, sc->aud_ioh, ICH_PCMI + ICH_BDBAR,
   1583 			  sc->sc_cddma + ICH_PCMI_OFF(0));
   1584 	bus_space_write_1(sc->iot, sc->aud_ioh, ICH_PCMI + ICH_LVI,
   1585 			  (0 - 1) & ICH_LVI_MASK);
   1586 
   1587 	/* start */
   1588 	microtime(&t1);
   1589 	bus_space_write_1(sc->iot, sc->aud_ioh, ICH_PCMI + ICH_CTRL, ICH_RPBM);
   1590 
   1591 	/* wait */
   1592 	nciv = ociv;
   1593 	do {
   1594 		microtime(&t2);
   1595 		if (t2.tv_sec - t1.tv_sec > 1)
   1596 			break;
   1597 		nciv = bus_space_read_1(sc->iot, sc->aud_ioh,
   1598 					ICH_PCMI + ICH_CIV);
   1599 	} while (nciv == ociv);
   1600 	microtime(&t2);
   1601 
   1602 	/* stop */
   1603 	bus_space_write_1(sc->iot, sc->aud_ioh, ICH_PCMI + ICH_CTRL, 0);
   1604 
   1605 	/* reset */
   1606 	DELAY(100);
   1607 	bus_space_write_1(sc->iot, sc->aud_ioh, ICH_PCMI + ICH_CTRL, ICH_RR);
   1608 
   1609 	/* turn time delta into us */
   1610 	wait_us = ((t2.tv_sec - t1.tv_sec) * 1000000) + t2.tv_usec - t1.tv_usec;
   1611 
   1612 	auich_freem(sc, temp_buffer, M_DEVBUF);
   1613 
   1614 	if (nciv == ociv) {
   1615 		printf("%s: ac97 link rate calibration timed out after %"
   1616 		       PRIu64 " us\n", sc->sc_dev.dv_xname, wait_us);
   1617 		return;
   1618 	}
   1619 
   1620 	actual_48k_rate = (bytes * UINT64_C(250000)) / wait_us;
   1621 
   1622 	if (actual_48k_rate < 50000)
   1623 		ac97rate = 48000;
   1624 	else
   1625 		ac97rate = ((actual_48k_rate + 500) / 1000) * 1000;
   1626 
   1627 	printf("%s: measured ac97 link rate at %d Hz",
   1628 	       sc->sc_dev.dv_xname, actual_48k_rate);
   1629 	if (ac97rate != actual_48k_rate)
   1630 		printf(", will use %d Hz", ac97rate);
   1631 	printf("\n");
   1632 
   1633 	sc->sc_ac97_clock = ac97rate;
   1634 }
   1635 
   1636 static void
   1637 auich_clear_cas(struct auich_softc *sc)
   1638 {
   1639 	/* Clear the codec access semaphore */
   1640 	(void)bus_space_read_2(sc->iot, sc->mix_ioh,
   1641 	    AC97_REG_RESET * (sc->sc_codecnum * ICH_CODEC_OFFSET));
   1642 
   1643 	return;
   1644 }
   1645