2 * ac97_codec.c: Generic AC97 mixer/modem module
4 * Derived from ac97 mixer in maestro and trident driver.
6 * Copyright 2000 Silicon Integrated System Corporation
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 **************************************************************************
24 * The Intel Audio Codec '97 specification is available at the Intel
25 * audio homepage: http://developer.intel.com/ial/scalableplatforms/audio/
27 * The specification itself is currently available at:
28 * ftp://download.intel.com/ial/scalableplatforms/ac97r22.pdf
30 **************************************************************************
33 * May 02, 2003 Liam Girdwood <liam.girdwood@wolfsonmicro.com>
34 * Removed non existant WM9700
35 * Added support for WM9705, WM9708, WM9709, WM9710, WM9711
37 * Mar 28, 2002 Randolph Bentson <bentson@holmsjoen.com>
38 * corrections to support WM9707 in ViewPad 1000
39 * v0.4 Mar 15 2000 Ollie Lho
40 * dual codecs support verified with 4 channels output
41 * v0.3 Feb 22 2000 Ollie Lho
42 * bug fix for record mask setting
43 * v0.2 Feb 10 2000 Ollie Lho
44 * add ac97_read_proc for /proc/driver/{vendor}/ac97
45 * v0.1 Jan 14 2000 Ollie Lho <ollie@sis.com.tw>
46 * Isolated from trident.c to support multiple ac97 codec
48 #include <linux/module.h>
49 #include <linux/version.h>
50 #include <linux/kernel.h>
51 #include <linux/slab.h>
52 #include <linux/string.h>
53 #include <linux/errno.h>
54 #include <linux/bitops.h>
55 #include <linux/delay.h>
56 #include <linux/ac97_codec.h>
57 #include <asm/uaccess.h>
59 #define CODEC_ID_BUFSZ 14
61 static int ac97_read_mixer(struct ac97_codec *codec, int oss_channel);
62 static void ac97_write_mixer(struct ac97_codec *codec, int oss_channel,
63 unsigned int left, unsigned int right);
64 static void ac97_set_mixer(struct ac97_codec *codec, unsigned int oss_mixer, unsigned int val );
65 static int ac97_recmask_io(struct ac97_codec *codec, int rw, int mask);
66 static int ac97_mixer_ioctl(struct ac97_codec *codec, unsigned int cmd, unsigned long arg);
68 static int ac97_init_mixer(struct ac97_codec *codec);
70 static int wolfson_init03(struct ac97_codec * codec);
71 static int wolfson_init04(struct ac97_codec * codec);
72 static int wolfson_init05(struct ac97_codec * codec);
73 static int wolfson_init11(struct ac97_codec * codec);
74 static int tritech_init(struct ac97_codec * codec);
75 static int tritech_maestro_init(struct ac97_codec * codec);
76 static int sigmatel_9708_init(struct ac97_codec *codec);
77 static int sigmatel_9721_init(struct ac97_codec *codec);
78 static int sigmatel_9744_init(struct ac97_codec *codec);
79 static int ad1886_init(struct ac97_codec *codec);
80 static int eapd_control(struct ac97_codec *codec, int);
81 static int crystal_digital_control(struct ac97_codec *codec, int slots, int rate, int mode);
82 static int cmedia_init(struct ac97_codec * codec);
83 static int cmedia_digital_control(struct ac97_codec *codec, int slots, int rate, int mode);
84 static int generic_digital_control(struct ac97_codec *codec, int slots, int rate, int mode);
90 * If you are adding a codec then you should be able to use
91 * eapd_ops - any codec that supports EAPD amp control (most)
92 * null_ops - any ancient codec that supports nothing
94 * The three functions are
95 * init - used for non AC97 standard initialisation
96 * amplifier - used to do amplifier control (1=on 0=off)
97 * digital - switch to digital modes (0 = analog)
99 * Not all codecs support all features, not all drivers use all the
103 static struct ac97_ops null_ops = { NULL, NULL, NULL };
104 static struct ac97_ops default_ops = { NULL, eapd_control, NULL };
105 static struct ac97_ops default_digital_ops = { NULL, eapd_control, generic_digital_control};
106 static struct ac97_ops wolfson_ops03 = { wolfson_init03, NULL, NULL };
107 static struct ac97_ops wolfson_ops04 = { wolfson_init04, NULL, NULL };
108 static struct ac97_ops wolfson_ops05 = { wolfson_init05, NULL, NULL };
109 static struct ac97_ops wolfson_ops11 = { wolfson_init11, NULL, NULL };
110 static struct ac97_ops tritech_ops = { tritech_init, NULL, NULL };
111 static struct ac97_ops tritech_m_ops = { tritech_maestro_init, NULL, NULL };
112 static struct ac97_ops sigmatel_9708_ops = { sigmatel_9708_init, NULL, NULL };
113 static struct ac97_ops sigmatel_9721_ops = { sigmatel_9721_init, NULL, NULL };
114 static struct ac97_ops sigmatel_9744_ops = { sigmatel_9744_init, NULL, NULL };
115 static struct ac97_ops crystal_digital_ops = { NULL, eapd_control, crystal_digital_control };
116 static struct ac97_ops ad1886_ops = { ad1886_init, eapd_control, NULL };
117 static struct ac97_ops cmedia_ops = { NULL, eapd_control, NULL};
118 static struct ac97_ops cmedia_digital_ops = { cmedia_init, eapd_control, cmedia_digital_control};
120 /* sorted by vendor/device id */
121 static const struct {
124 struct ac97_ops *ops;
126 } ac97_codec_ids[] = {
127 {0x41445303, "Analog Devices AD1819", &null_ops},
128 {0x41445340, "Analog Devices AD1881", &null_ops},
129 {0x41445348, "Analog Devices AD1881A", &null_ops},
130 {0x41445360, "Analog Devices AD1885", &default_ops},
131 {0x41445361, "Analog Devices AD1886", &ad1886_ops},
132 {0x41445460, "Analog Devices AD1885", &default_ops},
133 {0x41445461, "Analog Devices AD1886", &ad1886_ops},
134 {0x414B4D00, "Asahi Kasei AK4540", &null_ops},
135 {0x414B4D01, "Asahi Kasei AK4542", &null_ops},
136 {0x414B4D02, "Asahi Kasei AK4543", &null_ops},
137 {0x414C4326, "ALC100P", &null_ops},
138 {0x414C4710, "ALC200/200P", &null_ops},
139 {0x414C4720, "ALC650", &default_digital_ops},
140 {0x434D4941, "CMedia", &cmedia_ops, AC97_NO_PCM_VOLUME },
141 {0x434D4942, "CMedia", &cmedia_ops, AC97_NO_PCM_VOLUME },
142 {0x434D4961, "CMedia", &cmedia_digital_ops, AC97_NO_PCM_VOLUME },
143 {0x43525900, "Cirrus Logic CS4297", &default_ops},
144 {0x43525903, "Cirrus Logic CS4297", &default_ops},
145 {0x43525913, "Cirrus Logic CS4297A rev A", &default_ops},
146 {0x43525914, "Cirrus Logic CS4297A rev B", &default_ops},
147 {0x43525923, "Cirrus Logic CS4298", &null_ops},
148 {0x4352592B, "Cirrus Logic CS4294", &null_ops},
149 {0x4352592D, "Cirrus Logic CS4294", &null_ops},
150 {0x43525931, "Cirrus Logic CS4299 rev A", &crystal_digital_ops},
151 {0x43525933, "Cirrus Logic CS4299 rev C", &crystal_digital_ops},
152 {0x43525934, "Cirrus Logic CS4299 rev D", &crystal_digital_ops},
153 {0x43585442, "CXT66", &default_ops, AC97_DELUDED_MODEM },
154 {0x44543031, "Diamond Technology DT0893", &default_ops},
155 {0x45838308, "ESS Allegro ES1988", &null_ops},
156 {0x49434511, "ICE1232", &null_ops}, /* I hope --jk */
157 {0x4e534331, "National Semiconductor LM4549", &null_ops},
158 {0x53494c22, "Silicon Laboratory Si3036", &null_ops},
159 {0x53494c23, "Silicon Laboratory Si3038", &null_ops},
160 {0x545200FF, "TriTech TR?????", &tritech_m_ops},
161 {0x54524102, "TriTech TR28022", &null_ops},
162 {0x54524103, "TriTech TR28023", &null_ops},
163 {0x54524106, "TriTech TR28026", &null_ops},
164 {0x54524108, "TriTech TR28028", &tritech_ops},
165 {0x54524123, "TriTech TR A5", &null_ops},
166 {0x574D4C03, "Wolfson WM9703/07/08/17", &wolfson_ops03},
167 {0x574D4C04, "Wolfson WM9704M/WM9704Q", &wolfson_ops04},
168 {0x574D4C05, "Wolfson WM9705/WM9710", &wolfson_ops05},
169 {0x574D4C09, "Wolfson WM9709", &null_ops},
170 {0x574D4C12, "Wolfson WM9711/9712", &wolfson_ops11},
171 {0x83847600, "SigmaTel STAC????", &null_ops},
172 {0x83847604, "SigmaTel STAC9701/3/4/5", &null_ops},
173 {0x83847605, "SigmaTel STAC9704", &null_ops},
174 {0x83847608, "SigmaTel STAC9708", &sigmatel_9708_ops},
175 {0x83847609, "SigmaTel STAC9721/23", &sigmatel_9721_ops},
176 {0x83847644, "SigmaTel STAC9744/45", &sigmatel_9744_ops},
177 {0x83847656, "SigmaTel STAC9756/57", &sigmatel_9744_ops},
178 {0x83847666, "SigmaTel STAC9750T", &sigmatel_9744_ops},
179 {0x83847684, "SigmaTel STAC9783/84?", &null_ops},
180 {0x57454301, "Winbond 83971D", &null_ops},
183 static const char *ac97_stereo_enhancements[] =
185 /* 0 */ "No 3D Stereo Enhancement",
186 /* 1 */ "Analog Devices Phat Stereo",
187 /* 2 */ "Creative Stereo Enhancement",
188 /* 3 */ "National Semi 3D Stereo Enhancement",
189 /* 4 */ "YAMAHA Ymersion",
190 /* 5 */ "BBE 3D Stereo Enhancement",
191 /* 6 */ "Crystal Semi 3D Stereo Enhancement",
192 /* 7 */ "Qsound QXpander",
193 /* 8 */ "Spatializer 3D Stereo Enhancement",
194 /* 9 */ "SRS 3D Stereo Enhancement",
195 /* 10 */ "Platform Tech 3D Stereo Enhancement",
196 /* 11 */ "AKM 3D Audio",
197 /* 12 */ "Aureal Stereo Enhancement",
198 /* 13 */ "Aztech 3D Enhancement",
199 /* 14 */ "Binaura 3D Audio Enhancement",
200 /* 15 */ "ESS Technology Stereo Enhancement",
201 /* 16 */ "Harman International VMAx",
202 /* 17 */ "Nvidea 3D Stereo Enhancement",
203 /* 18 */ "Philips Incredible Sound",
204 /* 19 */ "Texas Instruments 3D Stereo Enhancement",
205 /* 20 */ "VLSI Technology 3D Stereo Enhancement",
206 /* 21 */ "TriTech 3D Stereo Enhancement",
207 /* 22 */ "Realtek 3D Stereo Enhancement",
208 /* 23 */ "Samsung 3D Stereo Enhancement",
209 /* 24 */ "Wolfson Microelectronics 3D Enhancement",
210 /* 25 */ "Delta Integration 3D Enhancement",
211 /* 26 */ "SigmaTel 3D Enhancement",
212 /* 27 */ "Winbond 3D Stereo Enhancement",
213 /* 28 */ "Rockwell 3D Stereo Enhancement",
214 /* 29 */ "Reserved 29",
215 /* 30 */ "Reserved 30",
216 /* 31 */ "Reserved 31"
219 /* this table has default mixer values for all OSS mixers. */
220 static struct mixer_defaults {
223 } mixer_defaults[SOUND_MIXER_NRDEVICES] = {
224 /* all values 0 -> 100 in bytes */
225 {SOUND_MIXER_VOLUME, 0x4343},
226 {SOUND_MIXER_BASS, 0x4343},
227 {SOUND_MIXER_TREBLE, 0x4343},
228 {SOUND_MIXER_PCM, 0x4343},
229 {SOUND_MIXER_SPEAKER, 0x4343},
230 {SOUND_MIXER_LINE, 0x4343},
231 {SOUND_MIXER_MIC, 0x0000},
232 {SOUND_MIXER_CD, 0x4343},
233 {SOUND_MIXER_ALTPCM, 0x4343},
234 {SOUND_MIXER_IGAIN, 0x4343},
235 {SOUND_MIXER_LINE1, 0x4343},
236 {SOUND_MIXER_PHONEIN, 0x4343},
237 {SOUND_MIXER_PHONEOUT, 0x4343},
238 {SOUND_MIXER_VIDEO, 0x4343},
242 /* table to scale scale from OSS mixer value to AC97 mixer register value */
243 static struct ac97_mixer_hw {
244 unsigned char offset;
246 } ac97_hw[SOUND_MIXER_NRDEVICES]= {
247 [SOUND_MIXER_VOLUME] = {AC97_MASTER_VOL_STEREO,64},
248 [SOUND_MIXER_BASS] = {AC97_MASTER_TONE, 16},
249 [SOUND_MIXER_TREBLE] = {AC97_MASTER_TONE, 16},
250 [SOUND_MIXER_PCM] = {AC97_PCMOUT_VOL, 32},
251 [SOUND_MIXER_SPEAKER] = {AC97_PCBEEP_VOL, 16},
252 [SOUND_MIXER_LINE] = {AC97_LINEIN_VOL, 32},
253 [SOUND_MIXER_MIC] = {AC97_MIC_VOL, 32},
254 [SOUND_MIXER_CD] = {AC97_CD_VOL, 32},
255 [SOUND_MIXER_ALTPCM] = {AC97_HEADPHONE_VOL, 64},
256 [SOUND_MIXER_IGAIN] = {AC97_RECORD_GAIN, 16},
257 [SOUND_MIXER_LINE1] = {AC97_AUX_VOL, 32},
258 [SOUND_MIXER_PHONEIN] = {AC97_PHONE_VOL, 32},
259 [SOUND_MIXER_PHONEOUT] = {AC97_MASTER_VOL_MONO, 64},
260 [SOUND_MIXER_VIDEO] = {AC97_VIDEO_VOL, 32},
263 /* the following tables allow us to go from OSS <-> ac97 quickly. */
264 enum ac97_recsettings {
270 AC97_REC_STEREO, /* combination of all enabled outputs.. */
271 AC97_REC_MONO, /*.. or the mono equivalent */
275 static const unsigned int ac97_rm2oss[] = {
276 [AC97_REC_MIC] = SOUND_MIXER_MIC,
277 [AC97_REC_CD] = SOUND_MIXER_CD,
278 [AC97_REC_VIDEO] = SOUND_MIXER_VIDEO,
279 [AC97_REC_AUX] = SOUND_MIXER_LINE1,
280 [AC97_REC_LINE] = SOUND_MIXER_LINE,
281 [AC97_REC_STEREO]= SOUND_MIXER_IGAIN,
282 [AC97_REC_PHONE] = SOUND_MIXER_PHONEIN
285 /* indexed by bit position */
286 static const unsigned int ac97_oss_rm[] = {
287 [SOUND_MIXER_MIC] = AC97_REC_MIC,
288 [SOUND_MIXER_CD] = AC97_REC_CD,
289 [SOUND_MIXER_VIDEO] = AC97_REC_VIDEO,
290 [SOUND_MIXER_LINE1] = AC97_REC_AUX,
291 [SOUND_MIXER_LINE] = AC97_REC_LINE,
292 [SOUND_MIXER_IGAIN] = AC97_REC_STEREO,
293 [SOUND_MIXER_PHONEIN] = AC97_REC_PHONE
296 static LIST_HEAD(codecs);
297 static LIST_HEAD(codec_drivers);
298 static DECLARE_MUTEX(codec_sem);
300 /* reads the given OSS mixer from the ac97 the caller must have insured that the ac97 knows
301 about that given mixer, and should be holding a spinlock for the card */
302 static int ac97_read_mixer(struct ac97_codec *codec, int oss_channel)
307 struct ac97_mixer_hw *mh = &ac97_hw[oss_channel];
309 val = codec->codec_read(codec , mh->offset);
311 if (val & AC97_MUTE) {
313 } else if (AC97_STEREO_MASK & (1 << oss_channel)) {
314 /* nice stereo mixers .. */
317 left = (val >> 8) & 0x7f;
320 if (oss_channel == SOUND_MIXER_IGAIN) {
321 right = (right * 100) / mh->scale;
322 left = (left * 100) / mh->scale;
324 /* these may have 5 or 6 bit resolution */
325 if(oss_channel == SOUND_MIXER_VOLUME || oss_channel == SOUND_MIXER_ALTPCM)
326 scale = (1 << codec->bit_resolution);
330 right = 100 - ((right * 100) / scale);
331 left = 100 - ((left * 100) / scale);
333 ret = left | (right << 8);
334 } else if (oss_channel == SOUND_MIXER_SPEAKER) {
335 ret = 100 - ((((val & 0x1e)>>1) * 100) / mh->scale);
336 } else if (oss_channel == SOUND_MIXER_PHONEIN) {
337 ret = 100 - (((val & 0x1f) * 100) / mh->scale);
338 } else if (oss_channel == SOUND_MIXER_PHONEOUT) {
339 scale = (1 << codec->bit_resolution);
340 ret = 100 - (((val & 0x1f) * 100) / scale);
341 } else if (oss_channel == SOUND_MIXER_MIC) {
342 ret = 100 - (((val & 0x1f) * 100) / mh->scale);
343 /* the low bit is optional in the tone sliders and masking
344 it lets us avoid the 0xf 'bypass'.. */
345 } else if (oss_channel == SOUND_MIXER_BASS) {
346 ret = 100 - ((((val >> 8) & 0xe) * 100) / mh->scale);
347 } else if (oss_channel == SOUND_MIXER_TREBLE) {
348 ret = 100 - (((val & 0xe) * 100) / mh->scale);
352 printk("ac97_codec: read OSS mixer %2d (%s ac97 register 0x%02x), "
353 "0x%04x -> 0x%04x\n",
354 oss_channel, codec->id ? "Secondary" : "Primary",
355 mh->offset, val, ret);
361 /* write the OSS encoded volume to the given OSS encoded mixer, again caller's job to
362 make sure all is well in arg land, call with spinlock held */
363 static void ac97_write_mixer(struct ac97_codec *codec, int oss_channel,
364 unsigned int left, unsigned int right)
368 struct ac97_mixer_hw *mh = &ac97_hw[oss_channel];
371 printk("ac97_codec: wrote OSS mixer %2d (%s ac97 register 0x%02x), "
372 "left vol:%2d, right vol:%2d:",
373 oss_channel, codec->id ? "Secondary" : "Primary",
374 mh->offset, left, right);
377 if (AC97_STEREO_MASK & (1 << oss_channel)) {
379 if (left == 0 && right == 0) {
382 if (oss_channel == SOUND_MIXER_IGAIN) {
383 right = (right * mh->scale) / 100;
384 left = (left * mh->scale) / 100;
385 if (right >= mh->scale)
387 if (left >= mh->scale)
390 /* these may have 5 or 6 bit resolution */
391 if (oss_channel == SOUND_MIXER_VOLUME ||
392 oss_channel == SOUND_MIXER_ALTPCM)
393 scale = (1 << codec->bit_resolution);
397 right = ((100 - right) * scale) / 100;
398 left = ((100 - left) * scale) / 100;
404 val = (left << 8) | right;
406 } else if (oss_channel == SOUND_MIXER_BASS) {
407 val = codec->codec_read(codec , mh->offset) & ~0x0f00;
408 left = ((100 - left) * mh->scale) / 100;
409 if (left >= mh->scale)
411 val |= (left << 8) & 0x0e00;
412 } else if (oss_channel == SOUND_MIXER_TREBLE) {
413 val = codec->codec_read(codec , mh->offset) & ~0x000f;
414 left = ((100 - left) * mh->scale) / 100;
415 if (left >= mh->scale)
417 val |= left & 0x000e;
418 } else if(left == 0) {
420 } else if (oss_channel == SOUND_MIXER_SPEAKER) {
421 left = ((100 - left) * mh->scale) / 100;
422 if (left >= mh->scale)
425 } else if (oss_channel == SOUND_MIXER_PHONEIN) {
426 left = ((100 - left) * mh->scale) / 100;
427 if (left >= mh->scale)
430 } else if (oss_channel == SOUND_MIXER_PHONEOUT) {
431 scale = (1 << codec->bit_resolution);
432 left = ((100 - left) * scale) / 100;
433 if (left >= mh->scale)
436 } else if (oss_channel == SOUND_MIXER_MIC) {
437 val = codec->codec_read(codec , mh->offset) & ~0x801f;
438 left = ((100 - left) * mh->scale) / 100;
439 if (left >= mh->scale)
442 /* the low bit is optional in the tone sliders and masking
443 it lets us avoid the 0xf 'bypass'.. */
446 printk(" 0x%04x", val);
449 codec->codec_write(codec, mh->offset, val);
452 val = codec->codec_read(codec, mh->offset);
453 printk(" -> 0x%04x\n", val);
457 /* a thin wrapper for write_mixer */
458 static void ac97_set_mixer(struct ac97_codec *codec, unsigned int oss_mixer, unsigned int val )
460 unsigned int left,right;
462 /* cleanse input a little */
463 right = ((val >> 8) & 0xff) ;
464 left = (val & 0xff) ;
466 if (right > 100) right = 100;
467 if (left > 100) left = 100;
469 codec->mixer_state[oss_mixer] = (right << 8) | left;
470 codec->write_mixer(codec, oss_mixer, left, right);
473 /* read or write the recmask, the ac97 can really have left and right recording
474 inputs independantly set, but OSS doesn't seem to want us to express that to
475 the user. the caller guarantees that we have a supported bit set, and they
476 must be holding the card's spinlock */
477 static int ac97_recmask_io(struct ac97_codec *codec, int rw, int mask)
482 /* read it from the card */
483 val = codec->codec_read(codec, AC97_RECORD_SELECT);
485 printk("ac97_codec: ac97 recmask to set to 0x%04x\n", val);
487 return (1 << ac97_rm2oss[val & 0x07]);
490 /* else, write the first set in the mask as the
492 /* clear out current set value first (AC97 supports only 1 input!) */
493 val = (1 << ac97_rm2oss[codec->codec_read(codec, AC97_RECORD_SELECT) & 0x07]);
498 val = ac97_oss_rm[val-1];
499 val |= val << 8; /* set both channels */
502 printk("ac97_codec: setting ac97 recmask to 0x%04x\n", val);
505 codec->codec_write(codec, AC97_RECORD_SELECT, val);
510 static int ac97_mixer_ioctl(struct ac97_codec *codec, unsigned int cmd, unsigned long arg)
514 if (cmd == SOUND_MIXER_INFO) {
516 memset(&info, 0, sizeof(info));
517 strlcpy(info.id, codec->name, sizeof(info.id));
518 strlcpy(info.name, codec->name, sizeof(info.name));
519 info.modify_counter = codec->modcnt;
520 if (copy_to_user((void *)arg, &info, sizeof(info)))
524 if (cmd == SOUND_OLD_MIXER_INFO) {
525 _old_mixer_info info;
526 memset(&info, 0, sizeof(info));
527 strlcpy(info.id, codec->name, sizeof(info.id));
528 strlcpy(info.name, codec->name, sizeof(info.name));
529 if (copy_to_user((void *)arg, &info, sizeof(info)))
534 if (_IOC_TYPE(cmd) != 'M' || _SIOC_SIZE(cmd) != sizeof(int))
537 if (cmd == OSS_GETVERSION)
538 return put_user(SOUND_VERSION, (int *)arg);
540 if (_SIOC_DIR(cmd) == _SIOC_READ) {
541 switch (_IOC_NR(cmd)) {
542 case SOUND_MIXER_RECSRC: /* give them the current record source */
543 if (!codec->recmask_io) {
546 val = codec->recmask_io(codec, 1, 0);
550 case SOUND_MIXER_DEVMASK: /* give them the supported mixers */
551 val = codec->supported_mixers;
554 case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
555 val = codec->record_sources;
558 case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
559 val = codec->stereo_mixers;
562 case SOUND_MIXER_CAPS:
563 val = SOUND_CAP_EXCL_INPUT;
566 default: /* read a specific mixer */
569 if (!supported_mixer(codec, i))
572 /* do we ever want to touch the hardware? */
573 /* val = codec->read_mixer(codec, i); */
574 val = codec->mixer_state[i];
577 return put_user(val, (int *)arg);
580 if (_SIOC_DIR(cmd) == (_SIOC_WRITE|_SIOC_READ)) {
582 if (get_user(val, (int *)arg))
585 switch (_IOC_NR(cmd)) {
586 case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
587 if (!codec->recmask_io) return -EINVAL;
589 if (!(val &= codec->record_sources)) return -EINVAL;
591 codec->recmask_io(codec, 0, val);
594 default: /* write a specific mixer */
597 if (!supported_mixer(codec, i))
600 ac97_set_mixer(codec, i, val);
608 /* entry point for /proc/driver/controller_vendor/ac97/%d */
609 int ac97_read_proc (char *page, char **start, off_t off,
610 int count, int *eof, void *data)
612 int len = 0, cap, extid, val, id1, id2;
613 struct ac97_codec *codec;
616 if ((codec = data) == NULL)
619 id1 = codec->codec_read(codec, AC97_VENDOR_ID1);
620 id2 = codec->codec_read(codec, AC97_VENDOR_ID2);
621 len += sprintf (page+len, "Vendor name : %s\n", codec->name);
622 len += sprintf (page+len, "Vendor id : %04X %04X\n", id1, id2);
624 extid = codec->codec_read(codec, AC97_EXTENDED_ID);
625 extid &= ~((1<<2)|(1<<4)|(1<<5)|(1<<10)|(1<<11)|(1<<12)|(1<<13));
626 len += sprintf (page+len, "AC97 Version : %s\n",
627 extid ? "2.0 or later" : "1.0");
628 if (extid) is_ac97_20 = 1;
630 cap = codec->codec_read(codec, AC97_RESET);
631 len += sprintf (page+len, "Capabilities :%s%s%s%s%s%s\n",
632 cap & 0x0001 ? " -dedicated MIC PCM IN channel-" : "",
633 cap & 0x0002 ? " -reserved1-" : "",
634 cap & 0x0004 ? " -bass & treble-" : "",
635 cap & 0x0008 ? " -simulated stereo-" : "",
636 cap & 0x0010 ? " -headphone out-" : "",
637 cap & 0x0020 ? " -loudness-" : "");
639 len += sprintf (page+len, "DAC resolutions :%s%s%s\n",
641 val & 0x0040 ? " -18-bit-" : "",
642 val & 0x0080 ? " -20-bit-" : "");
644 len += sprintf (page+len, "ADC resolutions :%s%s%s\n",
646 val & 0x0100 ? " -18-bit-" : "",
647 val & 0x0200 ? " -20-bit-" : "");
648 len += sprintf (page+len, "3D enhancement : %s\n",
649 ac97_stereo_enhancements[(cap >> 10) & 0x1f]);
651 val = codec->codec_read(codec, AC97_GENERAL_PURPOSE);
652 len += sprintf (page+len, "POP path : %s 3D\n"
654 "3D enhancement : %s\n"
658 "ADC/DAC loopback : %s\n",
659 val & 0x8000 ? "post" : "pre",
660 val & 0x4000 ? "on" : "off",
661 val & 0x2000 ? "on" : "off",
662 val & 0x1000 ? "on" : "off",
663 val & 0x0200 ? "MIC" : "MIX",
664 val & 0x0100 ? "MIC2" : "MIC1",
665 val & 0x0080 ? "on" : "off");
667 extid = codec->codec_read(codec, AC97_EXTENDED_ID);
669 len += sprintf (page+len, "Ext Capabilities :%s%s%s%s%s%s%s\n",
670 cap & 0x0001 ? " -var rate PCM audio-" : "",
671 cap & 0x0002 ? " -2x PCM audio out-" : "",
672 cap & 0x0008 ? " -var rate MIC in-" : "",
673 cap & 0x0040 ? " -PCM center DAC-" : "",
674 cap & 0x0080 ? " -PCM surround DAC-" : "",
675 cap & 0x0100 ? " -PCM LFE DAC-" : "",
676 cap & 0x0200 ? " -slot/DAC mappings-" : "");
678 len += sprintf (page+len, "Front DAC rate : %d\n",
679 codec->codec_read(codec, AC97_PCM_FRONT_DAC_RATE));
686 * codec_id - Turn id1/id2 into a PnP string
689 * @buf: CODEC_ID_BUFSZ byte buffer
691 * Fills buf with a zero terminated PnP ident string for the id1/id2
692 * pair. For convenience the return is the passed in buffer pointer.
695 static char *codec_id(u16 id1, u16 id2, char *buf)
698 snprintf(buf, CODEC_ID_BUFSZ, "0x%04x:0x%04x", id1, id2);
701 buf[1] = (id1 & 0xFF);
703 snprintf(buf+3, CODEC_ID_BUFSZ - 3, "%d", id2&0xFF);
709 * ac97_check_modem - Check if the Codec is a modem
710 * @codec: codec to check
712 * Return true if the device is an AC97 1.0 or AC97 2.0 modem
715 static int ac97_check_modem(struct ac97_codec *codec)
717 /* Check for an AC97 1.0 soft modem (ID1) */
718 if(codec->codec_read(codec, AC97_RESET) & 2)
720 /* Check for an AC97 2.x soft modem */
721 codec->codec_write(codec, AC97_EXTENDED_MODEM_ID, 0L);
722 if(codec->codec_read(codec, AC97_EXTENDED_MODEM_ID) & 1)
729 * ac97_alloc_codec - Allocate an AC97 codec
731 * Returns a new AC97 codec structure. AC97 codecs may become
732 * refcounted soon so this interface is needed. Returns with
733 * one reference taken.
736 struct ac97_codec *ac97_alloc_codec(void)
738 struct ac97_codec *codec = kmalloc(sizeof(struct ac97_codec), GFP_KERNEL);
742 memset(codec, 0, sizeof(*codec));
743 spin_lock_init(&codec->lock);
744 INIT_LIST_HEAD(&codec->list);
748 EXPORT_SYMBOL(ac97_alloc_codec);
751 * ac97_release_codec - Release an AC97 codec
752 * @codec: codec to release
754 * Release an allocated AC97 codec. This will be refcounted in
755 * time but for the moment is trivial. Calls the unregister
756 * handler if the codec is now defunct.
759 void ac97_release_codec(struct ac97_codec *codec)
761 /* Remove from the list first, we don't want to be
764 list_del(&codec->list);
767 * The driver needs to deal with internal
768 * locking to avoid accidents here.
771 codec->driver->remove(codec, codec->driver);
775 EXPORT_SYMBOL(ac97_release_codec);
778 * ac97_probe_codec - Initialize and setup AC97-compatible codec
779 * @codec: (in/out) Kernel info for a single AC97 codec
781 * Reset the AC97 codec, then initialize the mixer and
782 * the rest of the @codec structure.
784 * The codec_read and codec_write fields of @codec are
785 * required to be setup and working when this function
786 * is called. All other fields are set by this function.
788 * codec_wait field of @codec can optionally be provided
789 * when calling this function. If codec_wait is not %NULL,
790 * this function will call codec_wait any time it is
791 * necessary to wait for the audio chip to reach the
792 * codec-ready state. If codec_wait is %NULL, then
793 * the default behavior is to call schedule_timeout.
794 * Currently codec_wait is used to wait for AC97 codec
797 * Returns 1 (true) on success, or 0 (false) on failure.
800 int ac97_probe_codec(struct ac97_codec *codec)
805 char cidbuf[CODEC_ID_BUFSZ];
808 struct ac97_driver *d;
810 /* probing AC97 codec, AC97 2.0 says that bit 15 of register 0x00 (reset) should
813 * FIXME: is the following comment outdated? -jgarzik
814 * Probing of AC97 in this way is not reliable, it is not even SAFE !!
816 codec->codec_write(codec, AC97_RESET, 0L);
818 /* also according to spec, we wait for codec-ready state */
819 if (codec->codec_wait)
820 codec->codec_wait(codec);
824 if ((audio = codec->codec_read(codec, AC97_RESET)) & 0x8000) {
825 printk(KERN_ERR "ac97_codec: %s ac97 codec not present\n",
826 (codec->id & 0x2) ? (codec->id&1 ? "4th" : "Tertiary")
827 : (codec->id&1 ? "Secondary": "Primary"));
831 /* probe for Modem Codec */
832 codec->modem = ac97_check_modem(codec);
834 codec->codec_ops = &default_ops;
836 id1 = codec->codec_read(codec, AC97_VENDOR_ID1);
837 id2 = codec->codec_read(codec, AC97_VENDOR_ID2);
838 for (i = 0; i < ARRAY_SIZE(ac97_codec_ids); i++) {
839 if (ac97_codec_ids[i].id == ((id1 << 16) | id2)) {
840 codec->type = ac97_codec_ids[i].id;
841 codec->name = ac97_codec_ids[i].name;
842 codec->codec_ops = ac97_codec_ids[i].ops;
843 codec->flags = ac97_codec_ids[i].flags;
848 codec->model = (id1 << 16) | id2;
850 f = codec->codec_read(codec, AC97_EXTENDED_STATUS);
852 codec->codec_ops = &default_digital_ops;
854 /* A device which thinks its a modem but isnt */
855 if(codec->flags & AC97_DELUDED_MODEM)
858 if (codec->name == NULL)
859 codec->name = "Unknown";
860 printk(KERN_INFO "ac97_codec: AC97 %s codec, id: %s (%s)\n",
861 codec->modem ? "Modem" : (audio ? "Audio" : ""),
862 codec_id(id1, id2, cidbuf), codec->name);
864 if(!ac97_init_mixer(codec))
868 * Attach last so the caller can override the mixer
873 list_add(&codec->list, &codecs);
875 list_for_each(l, &codec_drivers) {
876 d = list_entry(l, struct ac97_driver, list);
877 if ((codec->model ^ d->codec_id) & d->codec_mask)
879 if(d->probe(codec, d) == 0)
890 static int ac97_init_mixer(struct ac97_codec *codec)
895 cap = codec->codec_read(codec, AC97_RESET);
898 codec->supported_mixers = AC97_SUPPORTED_MASK;
899 codec->stereo_mixers = AC97_STEREO_MASK;
900 codec->record_sources = AC97_RECORD_MASK;
902 codec->supported_mixers &= ~(SOUND_MASK_BASS|SOUND_MASK_TREBLE);
904 codec->supported_mixers &= ~SOUND_MASK_ALTPCM;
907 /* detect bit resolution */
908 codec->codec_write(codec, AC97_MASTER_VOL_STEREO, 0x2020);
909 if(codec->codec_read(codec, AC97_MASTER_VOL_STEREO) == 0x2020)
910 codec->bit_resolution = 6;
912 codec->bit_resolution = 5;
914 /* generic OSS to AC97 wrapper */
915 codec->read_mixer = ac97_read_mixer;
916 codec->write_mixer = ac97_write_mixer;
917 codec->recmask_io = ac97_recmask_io;
918 codec->mixer_ioctl = ac97_mixer_ioctl;
920 /* codec specific initialization for 4-6 channel output or secondary codec stuff */
921 if (codec->codec_ops->init != NULL) {
922 codec->codec_ops->init(codec);
925 /* initialize mixer channel volumes */
926 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
927 struct mixer_defaults *md = &mixer_defaults[i];
930 if (!supported_mixer(codec, md->mixer))
932 ac97_set_mixer(codec, md->mixer, md->value);
936 * Volume is MUTE only on this device. We have to initialise
937 * it but its useless beyond that.
939 if(codec->flags & AC97_NO_PCM_VOLUME)
941 codec->supported_mixers &= ~SOUND_MASK_PCM;
942 printk(KERN_WARNING "AC97 codec does not have proper volume support.\n");
947 #define AC97_SIGMATEL_ANALOG 0x6c /* Analog Special */
948 #define AC97_SIGMATEL_DAC2INVERT 0x6e
949 #define AC97_SIGMATEL_BIAS1 0x70
950 #define AC97_SIGMATEL_BIAS2 0x72
951 #define AC97_SIGMATEL_MULTICHN 0x74 /* Multi-Channel programming */
952 #define AC97_SIGMATEL_CIC1 0x76
953 #define AC97_SIGMATEL_CIC2 0x78
956 static int sigmatel_9708_init(struct ac97_codec * codec)
958 u16 codec72, codec6c;
960 codec72 = codec->codec_read(codec, AC97_SIGMATEL_BIAS2) & 0x8000;
961 codec6c = codec->codec_read(codec, AC97_SIGMATEL_ANALOG);
963 if ((codec72==0) && (codec6c==0)) {
964 codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
965 codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x1000);
966 codec->codec_write(codec, AC97_SIGMATEL_BIAS1, 0xabba);
967 codec->codec_write(codec, AC97_SIGMATEL_BIAS2, 0x0007);
968 } else if ((codec72==0x8000) && (codec6c==0)) {
969 codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
970 codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x1001);
971 codec->codec_write(codec, AC97_SIGMATEL_DAC2INVERT, 0x0008);
972 } else if ((codec72==0x8000) && (codec6c==0x0080)) {
975 codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x0000);
980 static int sigmatel_9721_init(struct ac97_codec * codec)
982 /* Only set up secondary codec */
986 codec->codec_write(codec, AC97_SURROUND_MASTER, 0L);
988 /* initialize SigmaTel STAC9721/23 as secondary codec, decoding AC link
989 sloc 3,4 = 0x01, slot 7,8 = 0x00, */
990 codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x00);
992 /* we don't have the crystal when we are on an AMR card, so use
993 BIT_CLK as our clock source. Write the magic word ABBA and read
994 back to enable register 0x78 */
995 codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
996 codec->codec_read(codec, AC97_SIGMATEL_CIC1);
998 /* sync all the clocks*/
999 codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x3802);
1005 static int sigmatel_9744_init(struct ac97_codec * codec)
1007 // patch for SigmaTel
1008 codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
1009 codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x0000); // is this correct? --jk
1010 codec->codec_write(codec, AC97_SIGMATEL_BIAS1, 0xabba);
1011 codec->codec_write(codec, AC97_SIGMATEL_BIAS2, 0x0002);
1012 codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x0000);
1016 static int cmedia_init(struct ac97_codec *codec)
1018 /* Initialise the CMedia 9739 */
1020 We could set various options here
1021 Register 0x20 bit 0x100 sets mic as center bass
1022 Also do multi_channel_ctrl &=~0x3000 |=0x1000
1024 For now we set up the GPIO and PC beep
1030 codec->codec_write(codec, 0x64, 0x3000);
1031 v = codec->codec_read(codec, 0x64);
1033 codec->codec_write(codec, 0x64, v);
1034 codec->codec_write(codec, 0x70, 0x0100);
1035 codec->codec_write(codec, 0x72, 0x0020);
1039 #define AC97_WM97XX_FMIXER_VOL 0x72
1040 #define AC97_WM97XX_RMIXER_VOL 0x74
1041 #define AC97_WM97XX_TEST 0x5a
1042 #define AC97_WM9704_RPCM_VOL 0x70
1043 #define AC97_WM9711_OUT3VOL 0x16
1045 static int wolfson_init03(struct ac97_codec * codec)
1047 /* this is known to work for the ViewSonic ViewPad 1000 */
1048 codec->codec_write(codec, AC97_WM97XX_FMIXER_VOL, 0x0808);
1049 codec->codec_write(codec, AC97_GENERAL_PURPOSE, 0x8000);
1053 static int wolfson_init04(struct ac97_codec * codec)
1055 codec->codec_write(codec, AC97_WM97XX_FMIXER_VOL, 0x0808);
1056 codec->codec_write(codec, AC97_WM97XX_RMIXER_VOL, 0x0808);
1058 // patch for DVD noise
1059 codec->codec_write(codec, AC97_WM97XX_TEST, 0x0200);
1061 // init vol as PCM vol
1062 codec->codec_write(codec, AC97_WM9704_RPCM_VOL,
1063 codec->codec_read(codec, AC97_PCMOUT_VOL));
1065 /* set rear surround volume */
1066 codec->codec_write(codec, AC97_SURROUND_MASTER, 0x0000);
1070 /* WM9705, WM9710 */
1071 static int wolfson_init05(struct ac97_codec * codec)
1073 /* set front mixer volume */
1074 codec->codec_write(codec, AC97_WM97XX_FMIXER_VOL, 0x0808);
1078 /* WM9711, WM9712 */
1079 static int wolfson_init11(struct ac97_codec * codec)
1081 /* set out3 volume */
1082 codec->codec_write(codec, AC97_WM9711_OUT3VOL, 0x0808);
1086 static int tritech_init(struct ac97_codec * codec)
1088 codec->codec_write(codec, 0x26, 0x0300);
1089 codec->codec_write(codec, 0x26, 0x0000);
1090 codec->codec_write(codec, AC97_SURROUND_MASTER, 0x0000);
1091 codec->codec_write(codec, AC97_RESERVED_3A, 0x0000);
1096 /* copied from drivers/sound/maestro.c */
1097 static int tritech_maestro_init(struct ac97_codec * codec)
1099 /* no idea what this does */
1100 codec->codec_write(codec, 0x2A, 0x0001);
1101 codec->codec_write(codec, 0x2C, 0x0000);
1102 codec->codec_write(codec, 0x2C, 0XFFFF);
1109 * Presario700 workaround
1110 * for Jack Sense/SPDIF Register mis-setting causing
1112 * by Santiago Nullo 04/05/2002
1115 #define AC97_AD1886_JACK_SENSE 0x72
1117 static int ad1886_init(struct ac97_codec * codec)
1119 /* from AD1886 Specs */
1120 codec->codec_write(codec, AC97_AD1886_JACK_SENSE, 0x0010);
1128 * This is basically standard AC97. It should work as a default for
1129 * almost all modern codecs. Note that some cards wire EAPD *backwards*
1130 * That side of it is up to the card driver not us to cope with.
1134 static int eapd_control(struct ac97_codec * codec, int on)
1137 codec->codec_write(codec, AC97_POWER_CONTROL,
1138 codec->codec_read(codec, AC97_POWER_CONTROL)|0x8000);
1140 codec->codec_write(codec, AC97_POWER_CONTROL,
1141 codec->codec_read(codec, AC97_POWER_CONTROL)&~0x8000);
1145 static int generic_digital_control(struct ac97_codec *codec, int slots, int rate, int mode)
1149 reg = codec->codec_read(codec, AC97_SPDIF_CONTROL);
1153 /* Off by default */
1156 reg = codec->codec_read(codec, AC97_EXTENDED_STATUS);
1157 codec->codec_write(codec, AC97_EXTENDED_STATUS, (reg & ~AC97_EA_SPDIF));
1162 reg = (reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_48K;
1165 reg = (reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_44K;
1168 reg = (reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_32K;
1172 reg &= ~AC97_SC_CC_MASK;
1173 reg |= (mode & AUDIO_CCMASK) << 6;
1175 if(mode & AUDIO_DIGITAL)
1177 if(mode & AUDIO_PRO)
1179 if(mode & AUDIO_DRS)
1182 codec->codec_write(codec, AC97_SPDIF_CONTROL, reg);
1184 reg = codec->codec_read(codec, AC97_EXTENDED_STATUS);
1185 reg &= (AC97_EA_SLOT_MASK);
1186 reg |= AC97_EA_VRA | AC97_EA_SPDIF | slots;
1187 codec->codec_write(codec, AC97_EXTENDED_STATUS, reg);
1189 reg = codec->codec_read(codec, AC97_EXTENDED_STATUS);
1192 codec->codec_write(codec, AC97_EXTENDED_STATUS, reg & ~ AC97_EA_SPDIF);
1199 * Crystal digital audio control (CS4299)
1202 static int crystal_digital_control(struct ac97_codec *codec, int slots, int rate, int mode)
1206 if(mode & AUDIO_DIGITAL)
1211 case 0: cv = 0x0; break; /* SPEN off */
1212 case 48000: cv = 0x8004; break; /* 48KHz digital */
1213 case 44100: cv = 0x8104; break; /* 44.1KHz digital */
1214 case 32768: /* 32Khz */
1218 codec->codec_write(codec, 0x68, cv);
1223 * CMedia digital audio control
1227 static int cmedia_digital_control(struct ac97_codec *codec, int slots, int rate, int mode)
1231 if(mode & AUDIO_DIGITAL)
1236 case 0: cv = 0x0001; break; /* SPEN off */
1237 case 48000: cv = 0x0009; break; /* 48KHz digital */
1241 codec->codec_write(codec, 0x2A, 0x05c4);
1242 codec->codec_write(codec, 0x6C, cv);
1244 /* Switch on mix to surround */
1245 cv = codec->codec_read(codec, 0x64);
1249 codec->codec_write(codec, 0x64, cv);
1254 /* copied from drivers/sound/maestro.c */
1255 #if 0 /* there has been 1 person on the planet with a pt101 that we
1256 know of. If they care, they can put this back in :) */
1257 static int pt101_init(struct ac97_codec * codec)
1259 printk(KERN_INFO "ac97_codec: PT101 Codec detected, initializing but _not_ installing mixer device.\n");
1261 codec->codec_write(codec, 0x2A, 0x0001);
1262 codec->codec_write(codec, 0x2C, 0x0000);
1263 codec->codec_write(codec, 0x2C, 0xFFFF);
1264 codec->codec_write(codec, 0x10, 0x9F1F);
1265 codec->codec_write(codec, 0x12, 0x0808);
1266 codec->codec_write(codec, 0x14, 0x9F1F);
1267 codec->codec_write(codec, 0x16, 0x9F1F);
1268 codec->codec_write(codec, 0x18, 0x0404);
1269 codec->codec_write(codec, 0x1A, 0x0000);
1270 codec->codec_write(codec, 0x1C, 0x0000);
1271 codec->codec_write(codec, 0x02, 0x0404);
1272 codec->codec_write(codec, 0x04, 0x0808);
1273 codec->codec_write(codec, 0x0C, 0x801F);
1274 codec->codec_write(codec, 0x0E, 0x801F);
1280 EXPORT_SYMBOL(ac97_read_proc);
1281 EXPORT_SYMBOL(ac97_probe_codec);
1284 * AC97 library support routines
1288 * ac97_set_dac_rate - set codec rate adaption
1290 * @rate: rate in hertz
1292 * Set the DAC rate. Assumes the codec supports VRA. The caller is
1293 * expected to have checked this little detail.
1296 unsigned int ac97_set_dac_rate(struct ac97_codec *codec, unsigned int rate)
1298 unsigned int new_rate = rate;
1300 u32 mast_vol, phone_vol, mono_vol, pcm_vol;
1301 u32 mute_vol = 0x8000; /* The mute volume? */
1303 if(rate != codec->codec_read(codec, AC97_PCM_FRONT_DAC_RATE))
1305 /* Mute several registers */
1306 mast_vol = codec->codec_read(codec, AC97_MASTER_VOL_STEREO);
1307 mono_vol = codec->codec_read(codec, AC97_MASTER_VOL_MONO);
1308 phone_vol = codec->codec_read(codec, AC97_HEADPHONE_VOL);
1309 pcm_vol = codec->codec_read(codec, AC97_PCMOUT_VOL);
1310 codec->codec_write(codec, AC97_MASTER_VOL_STEREO, mute_vol);
1311 codec->codec_write(codec, AC97_MASTER_VOL_MONO, mute_vol);
1312 codec->codec_write(codec, AC97_HEADPHONE_VOL, mute_vol);
1313 codec->codec_write(codec, AC97_PCMOUT_VOL, mute_vol);
1315 /* Power down the DAC */
1316 dacp=codec->codec_read(codec, AC97_POWER_CONTROL);
1317 codec->codec_write(codec, AC97_POWER_CONTROL, dacp|0x0200);
1318 /* Load the rate and read the effective rate */
1319 codec->codec_write(codec, AC97_PCM_FRONT_DAC_RATE, rate);
1320 new_rate=codec->codec_read(codec, AC97_PCM_FRONT_DAC_RATE);
1321 /* Power it back up */
1322 codec->codec_write(codec, AC97_POWER_CONTROL, dacp);
1324 /* Restore volumes */
1325 codec->codec_write(codec, AC97_MASTER_VOL_STEREO, mast_vol);
1326 codec->codec_write(codec, AC97_MASTER_VOL_MONO, mono_vol);
1327 codec->codec_write(codec, AC97_HEADPHONE_VOL, phone_vol);
1328 codec->codec_write(codec, AC97_PCMOUT_VOL, pcm_vol);
1333 EXPORT_SYMBOL(ac97_set_dac_rate);
1336 * ac97_set_adc_rate - set codec rate adaption
1338 * @rate: rate in hertz
1340 * Set the ADC rate. Assumes the codec supports VRA. The caller is
1341 * expected to have checked this little detail.
1344 unsigned int ac97_set_adc_rate(struct ac97_codec *codec, unsigned int rate)
1346 unsigned int new_rate = rate;
1349 if(rate != codec->codec_read(codec, AC97_PCM_LR_ADC_RATE))
1351 /* Power down the ADC */
1352 dacp=codec->codec_read(codec, AC97_POWER_CONTROL);
1353 codec->codec_write(codec, AC97_POWER_CONTROL, dacp|0x0100);
1354 /* Load the rate and read the effective rate */
1355 codec->codec_write(codec, AC97_PCM_LR_ADC_RATE, rate);
1356 new_rate=codec->codec_read(codec, AC97_PCM_LR_ADC_RATE);
1357 /* Power it back up */
1358 codec->codec_write(codec, AC97_POWER_CONTROL, dacp);
1363 EXPORT_SYMBOL(ac97_set_adc_rate);
1365 int ac97_save_state(struct ac97_codec *codec)
1370 EXPORT_SYMBOL(ac97_save_state);
1372 int ac97_restore_state(struct ac97_codec *codec)
1375 unsigned int left, right, val;
1377 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
1378 if (!supported_mixer(codec, i))
1381 val = codec->mixer_state[i];
1384 codec->write_mixer(codec, i, left, right);
1389 EXPORT_SYMBOL(ac97_restore_state);
1392 * ac97_register_driver - register a codec helper
1393 * @driver: Driver handler
1395 * Register a handler for codecs matching the codec id. The handler
1396 * attach function is called for all present codecs and will be
1397 * called when new codecs are discovered.
1400 int ac97_register_driver(struct ac97_driver *driver)
1402 struct list_head *l;
1403 struct ac97_codec *c;
1406 INIT_LIST_HEAD(&driver->list);
1407 list_add(&driver->list, &codec_drivers);
1409 list_for_each(l, &codecs)
1411 c = list_entry(l, struct ac97_codec, list);
1412 if(c->driver != NULL || ((c->model ^ driver->codec_id) & driver->codec_mask))
1414 if(driver->probe(c, driver))
1422 EXPORT_SYMBOL_GPL(ac97_register_driver);
1425 * ac97_unregister_driver - unregister a codec helper
1426 * @driver: Driver handler
1428 * Register a handler for codecs matching the codec id. The handler
1429 * attach function is called for all present codecs and will be
1430 * called when new codecs are discovered.
1433 void ac97_unregister_driver(struct ac97_driver *driver)
1435 struct list_head *l;
1436 struct ac97_codec *c;
1439 list_del_init(&driver->list);
1441 list_for_each(l, &codecs)
1443 c = list_entry(l, struct ac97_codec, list);
1444 if(c->driver == driver)
1445 driver->remove(c, driver);
1452 EXPORT_SYMBOL_GPL(ac97_unregister_driver);
1454 MODULE_LICENSE("GPL");