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1da177e4
LT		 1/*
2 * ac97_codec.c: Generic AC97 mixer/modem module
3 *
4 * Derived from ac97 mixer in maestro and trident driver.
5 *
6 * Copyright 2000 Silicon Integrated System Corporation
7 *
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.
12 *
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.
17 *
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.
21 *
22 **************************************************************************
23 *
24 * The Intel Audio Codec '97 specification is available at the Intel
25 * audio homepage: http://developer.intel.com/ial/scalableplatforms/audio/
26 *
27 * The specification itself is currently available at:
28 * ftp://download.intel.com/ial/scalableplatforms/ac97r22.pdf
29 *
30 **************************************************************************
31 *
32 * History
d331124d 33 * May 02, 2003 Liam Girdwood <lrg@slimlogic.co.uk>
1da177e4
LT		 34 * Removed non existant WM9700
35 * Added support for WM9705, WM9708, WM9709, WM9710, WM9711
36 * WM9712 and WM9717
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
47 */
48#include <linux/module.h>
49#include <linux/kernel.h>
50#include <linux/slab.h>
51#include <linux/string.h>
52#include <linux/errno.h>
53#include <linux/bitops.h>
54#include <linux/delay.h>
55#include <linux/pci.h>
56#include <linux/ac97_codec.h>
57#include <asm/uaccess.h>
f82945df 58#include <linux/mutex.h>
1da177e4
LT		 59
60#define CODEC_ID_BUFSZ 14
61
62static int ac97_read_mixer(struct ac97_codec *codec, int oss_channel);
63static void ac97_write_mixer(struct ac97_codec *codec, int oss_channel,
64 unsigned int left, unsigned int right);
65static void ac97_set_mixer(struct ac97_codec *codec, unsigned int oss_mixer, unsigned int val );
66static int ac97_recmask_io(struct ac97_codec *codec, int rw, int mask);
67static int ac97_mixer_ioctl(struct ac97_codec *codec, unsigned int cmd, unsigned long arg);
68
69static int ac97_init_mixer(struct ac97_codec *codec);
70
71static int wolfson_init03(struct ac97_codec * codec);
72static int wolfson_init04(struct ac97_codec * codec);
73static int wolfson_init05(struct ac97_codec * codec);
74static int wolfson_init11(struct ac97_codec * codec);
75static int wolfson_init13(struct ac97_codec * codec);
76static int tritech_init(struct ac97_codec * codec);
77static int tritech_maestro_init(struct ac97_codec * codec);
78static int sigmatel_9708_init(struct ac97_codec *codec);
79static int sigmatel_9721_init(struct ac97_codec *codec);
80static int sigmatel_9744_init(struct ac97_codec *codec);
81static int ad1886_init(struct ac97_codec *codec);
82static int eapd_control(struct ac97_codec *codec, int);
83static int crystal_digital_control(struct ac97_codec *codec, int slots, int rate, int mode);
84static int cmedia_init(struct ac97_codec * codec);
85static int cmedia_digital_control(struct ac97_codec *codec, int slots, int rate, int mode);
86static int generic_digital_control(struct ac97_codec *codec, int slots, int rate, int mode);
87
88
89/*
90 * AC97 operations.
91 *
92 * If you are adding a codec then you should be able to use
93 * eapd_ops - any codec that supports EAPD amp control (most)
94 * null_ops - any ancient codec that supports nothing
95 *
96 * The three functions are
97 * init - used for non AC97 standard initialisation
98 * amplifier - used to do amplifier control (1=on 0=off)
99 * digital - switch to digital modes (0 = analog)
100 *
101 * Not all codecs support all features, not all drivers use all the
102 * operations yet
103 */
104
105static struct ac97_ops null_ops = { NULL, NULL, NULL };
106static struct ac97_ops default_ops = { NULL, eapd_control, NULL };
107static struct ac97_ops default_digital_ops = { NULL, eapd_control, generic_digital_control};
108static struct ac97_ops wolfson_ops03 = { wolfson_init03, NULL, NULL };
109static struct ac97_ops wolfson_ops04 = { wolfson_init04, NULL, NULL };
110static struct ac97_ops wolfson_ops05 = { wolfson_init05, NULL, NULL };
111static struct ac97_ops wolfson_ops11 = { wolfson_init11, NULL, NULL };
112static struct ac97_ops wolfson_ops13 = { wolfson_init13, NULL, NULL };
113static struct ac97_ops tritech_ops = { tritech_init, NULL, NULL };
114static struct ac97_ops tritech_m_ops = { tritech_maestro_init, NULL, NULL };
115static struct ac97_ops sigmatel_9708_ops = { sigmatel_9708_init, NULL, NULL };
116static struct ac97_ops sigmatel_9721_ops = { sigmatel_9721_init, NULL, NULL };
117static struct ac97_ops sigmatel_9744_ops = { sigmatel_9744_init, NULL, NULL };
118static struct ac97_ops crystal_digital_ops = { NULL, eapd_control, crystal_digital_control };
119static struct ac97_ops ad1886_ops = { ad1886_init, eapd_control, NULL };
120static struct ac97_ops cmedia_ops = { NULL, eapd_control, NULL};
121static struct ac97_ops cmedia_digital_ops = { cmedia_init, eapd_control, cmedia_digital_control};
122
123/* sorted by vendor/device id */
124static const struct {
125 u32 id;
126 char *name;
127 struct ac97_ops *ops;
128 int flags;
129} ac97_codec_ids[] = {
130 {0x41445303, "Analog Devices AD1819", &null_ops},
131 {0x41445340, "Analog Devices AD1881", &null_ops},
132 {0x41445348, "Analog Devices AD1881A", &null_ops},
133 {0x41445360, "Analog Devices AD1885", &default_ops},
134 {0x41445361, "Analog Devices AD1886", &ad1886_ops},
135 {0x41445370, "Analog Devices AD1981", &null_ops},
136 {0x41445372, "Analog Devices AD1981A", &null_ops},
137 {0x41445374, "Analog Devices AD1981B", &null_ops},
138 {0x41445460, "Analog Devices AD1885", &default_ops},
139 {0x41445461, "Analog Devices AD1886", &ad1886_ops},
140 {0x414B4D00, "Asahi Kasei AK4540", &null_ops},
141 {0x414B4D01, "Asahi Kasei AK4542", &null_ops},
142 {0x414B4D02, "Asahi Kasei AK4543", &null_ops},
143 {0x414C4326, "ALC100P", &null_ops},
144 {0x414C4710, "ALC200/200P", &null_ops},
145 {0x414C4720, "ALC650", &default_digital_ops},
146 {0x434D4941, "CMedia", &cmedia_ops, AC97_NO_PCM_VOLUME },
147 {0x434D4942, "CMedia", &cmedia_ops, AC97_NO_PCM_VOLUME },
148 {0x434D4961, "CMedia", &cmedia_digital_ops, AC97_NO_PCM_VOLUME },
149 {0x43525900, "Cirrus Logic CS4297", &default_ops},
150 {0x43525903, "Cirrus Logic CS4297", &default_ops},
151 {0x43525913, "Cirrus Logic CS4297A rev A", &default_ops},
152 {0x43525914, "Cirrus Logic CS4297A rev B", &default_ops},
153 {0x43525923, "Cirrus Logic CS4298", &null_ops},
154 {0x4352592B, "Cirrus Logic CS4294", &null_ops},
155 {0x4352592D, "Cirrus Logic CS4294", &null_ops},
156 {0x43525931, "Cirrus Logic CS4299 rev A", &crystal_digital_ops},
157 {0x43525933, "Cirrus Logic CS4299 rev C", &crystal_digital_ops},
158 {0x43525934, "Cirrus Logic CS4299 rev D", &crystal_digital_ops},
becf3aec 159 {0x43585430, "CXT48", &default_ops, AC97_DELUDED_MODEM },
1da177e4
LT		 160 {0x43585442, "CXT66", &default_ops, AC97_DELUDED_MODEM },
161 {0x44543031, "Diamond Technology DT0893", &default_ops},
162 {0x45838308, "ESS Allegro ES1988", &null_ops},
163 {0x49434511, "ICE1232", &null_ops}, /* I hope --jk */
164 {0x4e534331, "National Semiconductor LM4549", &null_ops},
165 {0x53494c22, "Silicon Laboratory Si3036", &null_ops},
166 {0x53494c23, "Silicon Laboratory Si3038", &null_ops},
167 {0x545200FF, "TriTech TR?????", &tritech_m_ops},
168 {0x54524102, "TriTech TR28022", &null_ops},
169 {0x54524103, "TriTech TR28023", &null_ops},
170 {0x54524106, "TriTech TR28026", &null_ops},
171 {0x54524108, "TriTech TR28028", &tritech_ops},
172 {0x54524123, "TriTech TR A5", &null_ops},
173 {0x574D4C03, "Wolfson WM9703/07/08/17", &wolfson_ops03},
174 {0x574D4C04, "Wolfson WM9704M/WM9704Q", &wolfson_ops04},
175 {0x574D4C05, "Wolfson WM9705/WM9710", &wolfson_ops05},
176 {0x574D4C09, "Wolfson WM9709", &null_ops},
177 {0x574D4C12, "Wolfson WM9711/9712", &wolfson_ops11},
178 {0x574D4C13, "Wolfson WM9713", &wolfson_ops13, AC97_DEFAULT_POWER_OFF},
179 {0x83847600, "SigmaTel STAC????", &null_ops},
180 {0x83847604, "SigmaTel STAC9701/3/4/5", &null_ops},
181 {0x83847605, "SigmaTel STAC9704", &null_ops},
182 {0x83847608, "SigmaTel STAC9708", &sigmatel_9708_ops},
183 {0x83847609, "SigmaTel STAC9721/23", &sigmatel_9721_ops},
184 {0x83847644, "SigmaTel STAC9744/45", &sigmatel_9744_ops},
185 {0x83847652, "SigmaTel STAC9752/53", &default_ops},
186 {0x83847656, "SigmaTel STAC9756/57", &sigmatel_9744_ops},
187 {0x83847666, "SigmaTel STAC9750T", &sigmatel_9744_ops},
188 {0x83847684, "SigmaTel STAC9783/84?", &null_ops},
189 {0x57454301, "Winbond 83971D", &null_ops},
190};
191
1da177e4
LT		 192/* this table has default mixer values for all OSS mixers. */
193static struct mixer_defaults {
194 int mixer;
195 unsigned int value;
196} mixer_defaults[SOUND_MIXER_NRDEVICES] = {
197 /* all values 0 -> 100 in bytes */
198 {SOUND_MIXER_VOLUME, 0x4343},
199 {SOUND_MIXER_BASS, 0x4343},
200 {SOUND_MIXER_TREBLE, 0x4343},
201 {SOUND_MIXER_PCM, 0x4343},
202 {SOUND_MIXER_SPEAKER, 0x4343},
203 {SOUND_MIXER_LINE, 0x4343},
204 {SOUND_MIXER_MIC, 0x0000},
205 {SOUND_MIXER_CD, 0x4343},
206 {SOUND_MIXER_ALTPCM, 0x4343},
207 {SOUND_MIXER_IGAIN, 0x4343},
208 {SOUND_MIXER_LINE1, 0x4343},
209 {SOUND_MIXER_PHONEIN, 0x4343},
210 {SOUND_MIXER_PHONEOUT, 0x4343},
211 {SOUND_MIXER_VIDEO, 0x4343},
212 {-1,0}
213};
214
215/* table to scale scale from OSS mixer value to AC97 mixer register value */
216static struct ac97_mixer_hw {
217 unsigned char offset;
218 int scale;
219} ac97_hw[SOUND_MIXER_NRDEVICES]= {
220 [SOUND_MIXER_VOLUME] = {AC97_MASTER_VOL_STEREO,64},
221 [SOUND_MIXER_BASS] = {AC97_MASTER_TONE, 16},
222 [SOUND_MIXER_TREBLE] = {AC97_MASTER_TONE, 16},
223 [SOUND_MIXER_PCM] = {AC97_PCMOUT_VOL, 32},
224 [SOUND_MIXER_SPEAKER] = {AC97_PCBEEP_VOL, 16},
225 [SOUND_MIXER_LINE] = {AC97_LINEIN_VOL, 32},
226 [SOUND_MIXER_MIC] = {AC97_MIC_VOL, 32},
227 [SOUND_MIXER_CD] = {AC97_CD_VOL, 32},
228 [SOUND_MIXER_ALTPCM] = {AC97_HEADPHONE_VOL, 64},
229 [SOUND_MIXER_IGAIN] = {AC97_RECORD_GAIN, 16},
230 [SOUND_MIXER_LINE1] = {AC97_AUX_VOL, 32},
231 [SOUND_MIXER_PHONEIN] = {AC97_PHONE_VOL, 32},
232 [SOUND_MIXER_PHONEOUT] = {AC97_MASTER_VOL_MONO, 64},
233 [SOUND_MIXER_VIDEO] = {AC97_VIDEO_VOL, 32},
234};
235
236/* the following tables allow us to go from OSS <-> ac97 quickly. */
237enum ac97_recsettings {
238 AC97_REC_MIC=0,
239 AC97_REC_CD,
240 AC97_REC_VIDEO,
241 AC97_REC_AUX,
242 AC97_REC_LINE,
243 AC97_REC_STEREO, /* combination of all enabled outputs.. */
244 AC97_REC_MONO, /*.. or the mono equivalent */
245 AC97_REC_PHONE
246};
247
248static const unsigned int ac97_rm2oss[] = {
249 [AC97_REC_MIC] = SOUND_MIXER_MIC,
250 [AC97_REC_CD] = SOUND_MIXER_CD,
251 [AC97_REC_VIDEO] = SOUND_MIXER_VIDEO,
252 [AC97_REC_AUX] = SOUND_MIXER_LINE1,
253 [AC97_REC_LINE] = SOUND_MIXER_LINE,
254 [AC97_REC_STEREO]= SOUND_MIXER_IGAIN,
255 [AC97_REC_PHONE] = SOUND_MIXER_PHONEIN
256};
257
258/* indexed by bit position */
259static const unsigned int ac97_oss_rm[] = {
260 [SOUND_MIXER_MIC] = AC97_REC_MIC,
261 [SOUND_MIXER_CD] = AC97_REC_CD,
262 [SOUND_MIXER_VIDEO] = AC97_REC_VIDEO,
263 [SOUND_MIXER_LINE1] = AC97_REC_AUX,
264 [SOUND_MIXER_LINE] = AC97_REC_LINE,
265 [SOUND_MIXER_IGAIN] = AC97_REC_STEREO,
266 [SOUND_MIXER_PHONEIN] = AC97_REC_PHONE
267};
268
269static LIST_HEAD(codecs);
270static LIST_HEAD(codec_drivers);
f82945df 271static DEFINE_MUTEX(codec_mutex);
1da177e4
LT		 272
273/* reads the given OSS mixer from the ac97 the caller must have insured that the ac97 knows
274 about that given mixer, and should be holding a spinlock for the card */
275static int ac97_read_mixer(struct ac97_codec *codec, int oss_channel)
276{
277 u16 val;
278 int ret = 0;
279 int scale;
280 struct ac97_mixer_hw *mh = &ac97_hw[oss_channel];
281
282 val = codec->codec_read(codec , mh->offset);
283
284 if (val & AC97_MUTE) {
285 ret = 0;
286 } else if (AC97_STEREO_MASK & (1 << oss_channel)) {
287 /* nice stereo mixers .. */
288 int left,right;
289
290 left = (val >> 8) & 0x7f;
291 right = val & 0x7f;
292
293 if (oss_channel == SOUND_MIXER_IGAIN) {
294 right = (right * 100) / mh->scale;
295 left = (left * 100) / mh->scale;
296 } else {
297 /* these may have 5 or 6 bit resolution */
298 if(oss_channel == SOUND_MIXER_VOLUME || oss_channel == SOUND_MIXER_ALTPCM)
299 scale = (1 << codec->bit_resolution);
300 else
301 scale = mh->scale;
302
303 right = 100 - ((right * 100) / scale);
304 left = 100 - ((left * 100) / scale);
305 }
306 ret = left | (right << 8);
307 } else if (oss_channel == SOUND_MIXER_SPEAKER) {
308 ret = 100 - ((((val & 0x1e)>>1) * 100) / mh->scale);
309 } else if (oss_channel == SOUND_MIXER_PHONEIN) {
310 ret = 100 - (((val & 0x1f) * 100) / mh->scale);
311 } else if (oss_channel == SOUND_MIXER_PHONEOUT) {
312 scale = (1 << codec->bit_resolution);
313 ret = 100 - (((val & 0x1f) * 100) / scale);
314 } else if (oss_channel == SOUND_MIXER_MIC) {
315 ret = 100 - (((val & 0x1f) * 100) / mh->scale);
316 /* the low bit is optional in the tone sliders and masking
317 it lets us avoid the 0xf 'bypass'.. */
318 } else if (oss_channel == SOUND_MIXER_BASS) {
319 ret = 100 - ((((val >> 8) & 0xe) * 100) / mh->scale);
320 } else if (oss_channel == SOUND_MIXER_TREBLE) {
321 ret = 100 - (((val & 0xe) * 100) / mh->scale);
322 }
323
324#ifdef DEBUG
325 printk("ac97_codec: read OSS mixer %2d (%s ac97 register 0x%02x), "
326 "0x%04x -> 0x%04x\n",
327 oss_channel, codec->id ? "Secondary" : "Primary",
328 mh->offset, val, ret);
329#endif
330
331 return ret;
332}
333
334/* write the OSS encoded volume to the given OSS encoded mixer, again caller's job to
335 make sure all is well in arg land, call with spinlock held */
336static void ac97_write_mixer(struct ac97_codec *codec, int oss_channel,
337 unsigned int left, unsigned int right)
338{
339 u16 val = 0;
340 int scale;
341 struct ac97_mixer_hw *mh = &ac97_hw[oss_channel];
342
343#ifdef DEBUG
344 printk("ac97_codec: wrote OSS mixer %2d (%s ac97 register 0x%02x), "
345 "left vol:%2d, right vol:%2d:",
346 oss_channel, codec->id ? "Secondary" : "Primary",
347 mh->offset, left, right);
348#endif
349
350 if (AC97_STEREO_MASK & (1 << oss_channel)) {
351 /* stereo mixers */
352 if (left == 0 && right == 0) {
353 val = AC97_MUTE;
354 } else {
355 if (oss_channel == SOUND_MIXER_IGAIN) {
356 right = (right * mh->scale) / 100;
357 left = (left * mh->scale) / 100;
358 if (right >= mh->scale)
359 right = mh->scale-1;
360 if (left >= mh->scale)
361 left = mh->scale-1;
362 } else {
363 /* these may have 5 or 6 bit resolution */
364 if (oss_channel == SOUND_MIXER_VOLUME ||
365 oss_channel == SOUND_MIXER_ALTPCM)
366 scale = (1 << codec->bit_resolution);
367 else
368 scale = mh->scale;
369
370 right = ((100 - right) * scale) / 100;
371 left = ((100 - left) * scale) / 100;
372 if (right >= scale)
373 right = scale-1;
374 if (left >= scale)
375 left = scale-1;
376 }
377 val = (left << 8) | right;
378 }
379 } else if (oss_channel == SOUND_MIXER_BASS) {
380 val = codec->codec_read(codec , mh->offset) & ~0x0f00;
381 left = ((100 - left) * mh->scale) / 100;
382 if (left >= mh->scale)
383 left = mh->scale-1;
384 val |= (left << 8) & 0x0e00;
385 } else if (oss_channel == SOUND_MIXER_TREBLE) {
386 val = codec->codec_read(codec , mh->offset) & ~0x000f;
387 left = ((100 - left) * mh->scale) / 100;
388 if (left >= mh->scale)
389 left = mh->scale-1;
390 val |= left & 0x000e;
391 } else if(left == 0) {
392 val = AC97_MUTE;
393 } else if (oss_channel == SOUND_MIXER_SPEAKER) {
394 left = ((100 - left) * mh->scale) / 100;
395 if (left >= mh->scale)
396 left = mh->scale-1;
397 val = left << 1;
398 } else if (oss_channel == SOUND_MIXER_PHONEIN) {
399 left = ((100 - left) * mh->scale) / 100;
400 if (left >= mh->scale)
401 left = mh->scale-1;
402 val = left;
403 } else if (oss_channel == SOUND_MIXER_PHONEOUT) {
404 scale = (1 << codec->bit_resolution);
405 left = ((100 - left) * scale) / 100;
406 if (left >= mh->scale)
407 left = mh->scale-1;
408 val = left;
409 } else if (oss_channel == SOUND_MIXER_MIC) {
410 val = codec->codec_read(codec , mh->offset) & ~0x801f;
411 left = ((100 - left) * mh->scale) / 100;
412 if (left >= mh->scale)
413 left = mh->scale-1;
414 val |= left;
415 /* the low bit is optional in the tone sliders and masking
416 it lets us avoid the 0xf 'bypass'.. */
417 }
418#ifdef DEBUG
419 printk(" 0x%04x", val);
420#endif
421
422 codec->codec_write(codec, mh->offset, val);
423
424#ifdef DEBUG
425 val = codec->codec_read(codec, mh->offset);
426 printk(" -> 0x%04x\n", val);
427#endif
428}
429
430/* a thin wrapper for write_mixer */
431static void ac97_set_mixer(struct ac97_codec *codec, unsigned int oss_mixer, unsigned int val )
432{
433 unsigned int left,right;
434
435 /* cleanse input a little */
436 right = ((val >> 8) & 0xff) ;
437 left = (val & 0xff) ;
438
439 if (right > 100) right = 100;
440 if (left > 100) left = 100;
441
442 codec->mixer_state[oss_mixer] = (right << 8) | left;
443 codec->write_mixer(codec, oss_mixer, left, right);
444}
445
446/* read or write the recmask, the ac97 can really have left and right recording
447 inputs independantly set, but OSS doesn't seem to want us to express that to
448 the user. the caller guarantees that we have a supported bit set, and they
449 must be holding the card's spinlock */
450static int ac97_recmask_io(struct ac97_codec *codec, int rw, int mask)
451{
452 unsigned int val;
453
454 if (rw) {
455 /* read it from the card */
456 val = codec->codec_read(codec, AC97_RECORD_SELECT);
457#ifdef DEBUG
458 printk("ac97_codec: ac97 recmask to set to 0x%04x\n", val);
459#endif
460 return (1 << ac97_rm2oss[val & 0x07]);
461 }
462
463 /* else, write the first set in the mask as the
464 output */
465 /* clear out current set value first (AC97 supports only 1 input!) */
466 val = (1 << ac97_rm2oss[codec->codec_read(codec, AC97_RECORD_SELECT) & 0x07]);
467 if (mask != val)
468 mask &= ~val;
469
470 val = ffs(mask);
471 val = ac97_oss_rm[val-1];
472 val |= val << 8; /* set both channels */
473
474#ifdef DEBUG
475 printk("ac97_codec: setting ac97 recmask to 0x%04x\n", val);
476#endif
477
478 codec->codec_write(codec, AC97_RECORD_SELECT, val);
479
480 return 0;
481};
482
483static int ac97_mixer_ioctl(struct ac97_codec *codec, unsigned int cmd, unsigned long arg)
484{
485 int i, val = 0;
486
487 if (cmd == SOUND_MIXER_INFO) {
488 mixer_info info;
489 memset(&info, 0, sizeof(info));
490 strlcpy(info.id, codec->name, sizeof(info.id));
491 strlcpy(info.name, codec->name, sizeof(info.name));
492 info.modify_counter = codec->modcnt;
493 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
494 return -EFAULT;
495 return 0;
496 }
497 if (cmd == SOUND_OLD_MIXER_INFO) {
498 _old_mixer_info info;
499 memset(&info, 0, sizeof(info));
500 strlcpy(info.id, codec->name, sizeof(info.id));
501 strlcpy(info.name, codec->name, sizeof(info.name));
502 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
503 return -EFAULT;
504 return 0;
505 }
506
507 if (_IOC_TYPE(cmd) != 'M' || _SIOC_SIZE(cmd) != sizeof(int))
508 return -EINVAL;
509
510 if (cmd == OSS_GETVERSION)
511 return put_user(SOUND_VERSION, (int __user *)arg);
512
513 if (_SIOC_DIR(cmd) == _SIOC_READ) {
514 switch (_IOC_NR(cmd)) {
515 case SOUND_MIXER_RECSRC: /* give them the current record source */
516 if (!codec->recmask_io) {
517 val = 0;
518 } else {
519 val = codec->recmask_io(codec, 1, 0);
520 }
521 break;
522
523 case SOUND_MIXER_DEVMASK: /* give them the supported mixers */
524 val = codec->supported_mixers;
525 break;
526
527 case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
528 val = codec->record_sources;
529 break;
530
531 case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
532 val = codec->stereo_mixers;
533 break;
534
535 case SOUND_MIXER_CAPS:
536 val = SOUND_CAP_EXCL_INPUT;
537 break;
538
539 default: /* read a specific mixer */
540 i = _IOC_NR(cmd);
541
542 if (!supported_mixer(codec, i))
543 return -EINVAL;
544
545 /* do we ever want to touch the hardware? */
546 /* val = codec->read_mixer(codec, i); */
547 val = codec->mixer_state[i];
548 break;
549 }
550 return put_user(val, (int __user *)arg);
551 }
552
553 if (_SIOC_DIR(cmd) == (_SIOC_WRITE|_SIOC_READ)) {
554 codec->modcnt++;
555 if (get_user(val, (int __user *)arg))
556 return -EFAULT;
557
558 switch (_IOC_NR(cmd)) {
559 case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
560 if (!codec->recmask_io) return -EINVAL;
561 if (!val) return 0;
562 if (!(val &= codec->record_sources)) return -EINVAL;
563
564 codec->recmask_io(codec, 0, val);
565
566 return 0;
567 default: /* write a specific mixer */
568 i = _IOC_NR(cmd);
569
570 if (!supported_mixer(codec, i))
571 return -EINVAL;
572
573 ac97_set_mixer(codec, i, val);
574
575 return 0;
576 }
577 }
578 return -EINVAL;
579}
580
1da177e4
LT		 581/**
582 * codec_id - Turn id1/id2 into a PnP string
583 * @id1: Vendor ID1
584 * @id2: Vendor ID2
585 * @buf: CODEC_ID_BUFSZ byte buffer
586 *
587 * Fills buf with a zero terminated PnP ident string for the id1/id2
588 * pair. For convenience the return is the passed in buffer pointer.
589 */
590
591static char *codec_id(u16 id1, u16 id2, char *buf)
592{
593 if(id1&0x8080) {
594 snprintf(buf, CODEC_ID_BUFSZ, "0x%04x:0x%04x", id1, id2);
595 } else {
596 buf[0] = (id1 >> 8);
597 buf[1] = (id1 & 0xFF);
598 buf[2] = (id2 >> 8);
599 snprintf(buf+3, CODEC_ID_BUFSZ - 3, "%d", id2&0xFF);
600 }
601 return buf;
602}
603
604/**
605 * ac97_check_modem - Check if the Codec is a modem
606 * @codec: codec to check
607 *
608 * Return true if the device is an AC97 1.0 or AC97 2.0 modem
609 */
610
611static int ac97_check_modem(struct ac97_codec *codec)
612{
613 /* Check for an AC97 1.0 soft modem (ID1) */
614 if(codec->codec_read(codec, AC97_RESET) & 2)
615 return 1;
616 /* Check for an AC97 2.x soft modem */
617 codec->codec_write(codec, AC97_EXTENDED_MODEM_ID, 0L);
618 if(codec->codec_read(codec, AC97_EXTENDED_MODEM_ID) & 1)
619 return 1;
620 return 0;
621}
622
623
624/**
625 * ac97_alloc_codec - Allocate an AC97 codec
626 *
627 * Returns a new AC97 codec structure. AC97 codecs may become
628 * refcounted soon so this interface is needed. Returns with
629 * one reference taken.
630 */
631
632struct ac97_codec *ac97_alloc_codec(void)
633{
3159f06d 634 struct ac97_codec *codec = kzalloc(sizeof(struct ac97_codec), GFP_KERNEL);
1da177e4
LT		 635 if(!codec)
636 return NULL;
637
1da177e4
LT		 638 spin_lock_init(&codec->lock);
639 INIT_LIST_HEAD(&codec->list);
640 return codec;
641}
642
643EXPORT_SYMBOL(ac97_alloc_codec);
644
645/**
646 * ac97_release_codec - Release an AC97 codec
647 * @codec: codec to release
648 *
649 * Release an allocated AC97 codec. This will be refcounted in
650 * time but for the moment is trivial. Calls the unregister
651 * handler if the codec is now defunct.
652 */
653
654void ac97_release_codec(struct ac97_codec *codec)
655{
656 /* Remove from the list first, we don't want to be
657 "rediscovered" */
f82945df 658 mutex_lock(&codec_mutex);
1da177e4 659 list_del(&codec->list);
f82945df 660 mutex_unlock(&codec_mutex);
1da177e4
LT		 661 /*
662 * The driver needs to deal with internal
663 * locking to avoid accidents here.
664 */
665 if(codec->driver)
666 codec->driver->remove(codec, codec->driver);
667 kfree(codec);
668}
669
670EXPORT_SYMBOL(ac97_release_codec);
671
672/**
673 * ac97_probe_codec - Initialize and setup AC97-compatible codec
674 * @codec: (in/out) Kernel info for a single AC97 codec
675 *
676 * Reset the AC97 codec, then initialize the mixer and
677 * the rest of the @codec structure.
678 *
679 * The codec_read and codec_write fields of @codec are
680 * required to be setup and working when this function
681 * is called. All other fields are set by this function.
682 *
683 * codec_wait field of @codec can optionally be provided
684 * when calling this function. If codec_wait is not %NULL,
685 * this function will call codec_wait any time it is
686 * necessary to wait for the audio chip to reach the
687 * codec-ready state. If codec_wait is %NULL, then
688 * the default behavior is to call schedule_timeout.
689 * Currently codec_wait is used to wait for AC97 codec
690 * reset to complete.
691 *
692 * Some codecs will power down when a register reset is
693 * performed. We now check for such codecs.
694 *
695 * Returns 1 (true) on success, or 0 (false) on failure.
696 */
697
698int ac97_probe_codec(struct ac97_codec *codec)
699{
700 u16 id1, id2;
701 u16 audio;
702 int i;
703 char cidbuf[CODEC_ID_BUFSZ];
704 u16 f;
705 struct list_head *l;
706 struct ac97_driver *d;
707
708 /* wait for codec-ready state */
709 if (codec->codec_wait)
710 codec->codec_wait(codec);
711 else
712 udelay(10);
713
714 /* will the codec power down if register reset ? */
715 id1 = codec->codec_read(codec, AC97_VENDOR_ID1);
716 id2 = codec->codec_read(codec, AC97_VENDOR_ID2);
717 codec->name = NULL;
718 codec->codec_ops = &null_ops;
719 for (i = 0; i < ARRAY_SIZE(ac97_codec_ids); i++) {
720 if (ac97_codec_ids[i].id == ((id1 << 16) | id2)) {
721 codec->type = ac97_codec_ids[i].id;
722 codec->name = ac97_codec_ids[i].name;
723 codec->codec_ops = ac97_codec_ids[i].ops;
724 codec->flags = ac97_codec_ids[i].flags;
725 break;
726 }
727 }
728
729 codec->model = (id1 << 16) | id2;
730 if ((codec->flags & AC97_DEFAULT_POWER_OFF) == 0) {
731 /* reset codec and wait for the ready bit before we continue */
732 codec->codec_write(codec, AC97_RESET, 0L);
733 if (codec->codec_wait)
734 codec->codec_wait(codec);
735 else
736 udelay(10);
737 }
738
739 /* probing AC97 codec, AC97 2.0 says that bit 15 of register 0x00 (reset) should
740 * be read zero.
741 *
742 * FIXME: is the following comment outdated? -jgarzik
743 * Probing of AC97 in this way is not reliable, it is not even SAFE !!
744 */
745 if ((audio = codec->codec_read(codec, AC97_RESET)) & 0x8000) {
746 printk(KERN_ERR "ac97_codec: %s ac97 codec not present\n",
747 (codec->id & 0x2) ? (codec->id&1 ? "4th" : "Tertiary")
748 : (codec->id&1 ? "Secondary": "Primary"));
749 return 0;
750 }
751
752 /* probe for Modem Codec */
753 codec->modem = ac97_check_modem(codec);
754
755 /* enable SPDIF */
756 f = codec->codec_read(codec, AC97_EXTENDED_STATUS);
757 if((codec->codec_ops == &null_ops) && (f & 4))
758 codec->codec_ops = &default_digital_ops;
759
760 /* A device which thinks its a modem but isnt */
761 if(codec->flags & AC97_DELUDED_MODEM)
762 codec->modem = 0;
763
764 if (codec->name == NULL)
765 codec->name = "Unknown";
766 printk(KERN_INFO "ac97_codec: AC97 %s codec, id: %s (%s)\n",
767 codec->modem ? "Modem" : (audio ? "Audio" : ""),
768 codec_id(id1, id2, cidbuf), codec->name);
769
770 if(!ac97_init_mixer(codec))
771 return 0;
772
773 /*
774 * Attach last so the caller can override the mixer
775 * callbacks.
776 */
777
f82945df 778 mutex_lock(&codec_mutex);
1da177e4
LT		 779 list_add(&codec->list, &codecs);
780
781 list_for_each(l, &codec_drivers) {
782 d = list_entry(l, struct ac97_driver, list);
783 if ((codec->model ^ d->codec_id) & d->codec_mask)
784 continue;
785 if(d->probe(codec, d) == 0)
786 {
787 codec->driver = d;
788 break;
789 }
790 }
791
f82945df 792 mutex_unlock(&codec_mutex);
1da177e4
LT		 793 return 1;
794}
795
796static int ac97_init_mixer(struct ac97_codec *codec)
797{
798 u16 cap;
799 int i;
800
801 cap = codec->codec_read(codec, AC97_RESET);
802
803 /* mixer masks */
804 codec->supported_mixers = AC97_SUPPORTED_MASK;
805 codec->stereo_mixers = AC97_STEREO_MASK;
806 codec->record_sources = AC97_RECORD_MASK;
807 if (!(cap & 0x04))
808 codec->supported_mixers &= ~(SOUND_MASK_BASS|SOUND_MASK_TREBLE);
809 if (!(cap & 0x10))
810 codec->supported_mixers &= ~SOUND_MASK_ALTPCM;
811
812
813 /* detect bit resolution */
814 codec->codec_write(codec, AC97_MASTER_VOL_STEREO, 0x2020);
815 if(codec->codec_read(codec, AC97_MASTER_VOL_STEREO) == 0x2020)
816 codec->bit_resolution = 6;
817 else
818 codec->bit_resolution = 5;
819
820 /* generic OSS to AC97 wrapper */
821 codec->read_mixer = ac97_read_mixer;
822 codec->write_mixer = ac97_write_mixer;
823 codec->recmask_io = ac97_recmask_io;
824 codec->mixer_ioctl = ac97_mixer_ioctl;
825
826 /* initialize mixer channel volumes */
827 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
828 struct mixer_defaults *md = &mixer_defaults[i];
829 if (md->mixer == -1)
830 break;
831 if (!supported_mixer(codec, md->mixer))
832 continue;
833 ac97_set_mixer(codec, md->mixer, md->value);
834 }
835
836 /* codec specific initialization for 4-6 channel output or secondary codec stuff */
837 if (codec->codec_ops->init != NULL) {
838 codec->codec_ops->init(codec);
839 }
840
841 /*
842 * Volume is MUTE only on this device. We have to initialise
843 * it but its useless beyond that.
844 */
845 if(codec->flags & AC97_NO_PCM_VOLUME)
846 {
847 codec->supported_mixers &= ~SOUND_MASK_PCM;
848 printk(KERN_WARNING "AC97 codec does not have proper volume support.\n");
849 }
850 return 1;
851}
852
853#define AC97_SIGMATEL_ANALOG 0x6c /* Analog Special */
854#define AC97_SIGMATEL_DAC2INVERT 0x6e
855#define AC97_SIGMATEL_BIAS1 0x70
856#define AC97_SIGMATEL_BIAS2 0x72
857#define AC97_SIGMATEL_MULTICHN 0x74 /* Multi-Channel programming */
858#define AC97_SIGMATEL_CIC1 0x76
859#define AC97_SIGMATEL_CIC2 0x78
860
861
862static int sigmatel_9708_init(struct ac97_codec * codec)
863{
864 u16 codec72, codec6c;
865
866 codec72 = codec->codec_read(codec, AC97_SIGMATEL_BIAS2) & 0x8000;
867 codec6c = codec->codec_read(codec, AC97_SIGMATEL_ANALOG);
868
869 if ((codec72==0) && (codec6c==0)) {
870 codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
871 codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x1000);
872 codec->codec_write(codec, AC97_SIGMATEL_BIAS1, 0xabba);
873 codec->codec_write(codec, AC97_SIGMATEL_BIAS2, 0x0007);
874 } else if ((codec72==0x8000) && (codec6c==0)) {
875 codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
876 codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x1001);
877 codec->codec_write(codec, AC97_SIGMATEL_DAC2INVERT, 0x0008);
878 } else if ((codec72==0x8000) && (codec6c==0x0080)) {
879 /* nothing */
880 }
881 codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x0000);
882 return 0;
883}
884
885
886static int sigmatel_9721_init(struct ac97_codec * codec)
887{
888 /* Only set up secondary codec */
889 if (codec->id == 0)
890 return 0;
891
892 codec->codec_write(codec, AC97_SURROUND_MASTER, 0L);
893
894 /* initialize SigmaTel STAC9721/23 as secondary codec, decoding AC link
895 sloc 3,4 = 0x01, slot 7,8 = 0x00, */
896 codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x00);
897
898 /* we don't have the crystal when we are on an AMR card, so use
899 BIT_CLK as our clock source. Write the magic word ABBA and read
900 back to enable register 0x78 */
901 codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
902 codec->codec_read(codec, AC97_SIGMATEL_CIC1);
903
904 /* sync all the clocks*/
905 codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x3802);
906
907 return 0;
908}
909
910
911static int sigmatel_9744_init(struct ac97_codec * codec)
912{
913 // patch for SigmaTel
914 codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
915 codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x0000); // is this correct? --jk
916 codec->codec_write(codec, AC97_SIGMATEL_BIAS1, 0xabba);
917 codec->codec_write(codec, AC97_SIGMATEL_BIAS2, 0x0002);
918 codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x0000);
919 return 0;
920}
921
922static int cmedia_init(struct ac97_codec *codec)
923{
924 /* Initialise the CMedia 9739 */
925 /*
926 We could set various options here
927 Register 0x20 bit 0x100 sets mic as center bass
928 Also do multi_channel_ctrl &=~0x3000 |=0x1000
929
930 For now we set up the GPIO and PC beep
931 */
932
933 u16 v;
934
935 /* MIC */
936 codec->codec_write(codec, 0x64, 0x3000);
937 v = codec->codec_read(codec, 0x64);
938 v &= ~0x8000;
939 codec->codec_write(codec, 0x64, v);
940 codec->codec_write(codec, 0x70, 0x0100);
941 codec->codec_write(codec, 0x72, 0x0020);
942 return 0;
943}
944
945#define AC97_WM97XX_FMIXER_VOL 0x72
946#define AC97_WM97XX_RMIXER_VOL 0x74
947#define AC97_WM97XX_TEST 0x5a
948#define AC97_WM9704_RPCM_VOL 0x70
949#define AC97_WM9711_OUT3VOL 0x16
950
951static int wolfson_init03(struct ac97_codec * codec)
952{
953 /* this is known to work for the ViewSonic ViewPad 1000 */
954 codec->codec_write(codec, AC97_WM97XX_FMIXER_VOL, 0x0808);
955 codec->codec_write(codec, AC97_GENERAL_PURPOSE, 0x8000);
956 return 0;
957}
958
959static int wolfson_init04(struct ac97_codec * codec)
960{
961 codec->codec_write(codec, AC97_WM97XX_FMIXER_VOL, 0x0808);
962 codec->codec_write(codec, AC97_WM97XX_RMIXER_VOL, 0x0808);
963
964 // patch for DVD noise
965 codec->codec_write(codec, AC97_WM97XX_TEST, 0x0200);
966
967 // init vol as PCM vol
968 codec->codec_write(codec, AC97_WM9704_RPCM_VOL,
969 codec->codec_read(codec, AC97_PCMOUT_VOL));
970
971 /* set rear surround volume */
972 codec->codec_write(codec, AC97_SURROUND_MASTER, 0x0000);
973 return 0;
974}
975
976/* WM9705, WM9710 */
977static int wolfson_init05(struct ac97_codec * codec)
978{
979 /* set front mixer volume */
980 codec->codec_write(codec, AC97_WM97XX_FMIXER_VOL, 0x0808);
981 return 0;
982}
983
984/* WM9711, WM9712 */
985static int wolfson_init11(struct ac97_codec * codec)
986{
987 /* stop pop's during suspend/resume */
988 codec->codec_write(codec, AC97_WM97XX_TEST,
989 codec->codec_read(codec, AC97_WM97XX_TEST) & 0xffbf);
990
991 /* set out3 volume */
992 codec->codec_write(codec, AC97_WM9711_OUT3VOL, 0x0808);
993 return 0;
994}
995
996/* WM9713 */
997static int wolfson_init13(struct ac97_codec * codec)
998{
999 codec->codec_write(codec, AC97_RECORD_GAIN, 0x00a0);
1000 codec->codec_write(codec, AC97_POWER_CONTROL, 0x0000);
1001 codec->codec_write(codec, AC97_EXTENDED_MODEM_ID, 0xDA00);
1002 codec->codec_write(codec, AC97_EXTEND_MODEM_STAT, 0x3810);
1003 codec->codec_write(codec, AC97_PHONE_VOL, 0x0808);
1004 codec->codec_write(codec, AC97_PCBEEP_VOL, 0x0808);
1005
1006 return 0;
1007}
1008
1009static int tritech_init(struct ac97_codec * codec)
1010{
1011 codec->codec_write(codec, 0x26, 0x0300);
1012 codec->codec_write(codec, 0x26, 0x0000);
1013 codec->codec_write(codec, AC97_SURROUND_MASTER, 0x0000);
1014 codec->codec_write(codec, AC97_RESERVED_3A, 0x0000);
1015 return 0;
1016}
1017
1018
1019/* copied from drivers/sound/maestro.c */
1020static int tritech_maestro_init(struct ac97_codec * codec)
1021{
1022 /* no idea what this does */
1023 codec->codec_write(codec, 0x2A, 0x0001);
1024 codec->codec_write(codec, 0x2C, 0x0000);
1025 codec->codec_write(codec, 0x2C, 0XFFFF);
1026 return 0;
1027}
1028
1029
1030
1031/*
1032 * Presario700 workaround
1033 * for Jack Sense/SPDIF Register mis-setting causing
1034 * no audible output
1035 * by Santiago Nullo 04/05/2002
1036 */
1037
1038#define AC97_AD1886_JACK_SENSE 0x72
1039
1040static int ad1886_init(struct ac97_codec * codec)
1041{
1042 /* from AD1886 Specs */
1043 codec->codec_write(codec, AC97_AD1886_JACK_SENSE, 0x0010);
1044 return 0;
1045}
1046
1047
1048
1049
1050/*
1051 * This is basically standard AC97. It should work as a default for
1052 * almost all modern codecs. Note that some cards wire EAPD *backwards*
1053 * That side of it is up to the card driver not us to cope with.
1054 *
1055 */
1056
1057static int eapd_control(struct ac97_codec * codec, int on)
1058{
1059 if(on)
1060 codec->codec_write(codec, AC97_POWER_CONTROL,
1061 codec->codec_read(codec, AC97_POWER_CONTROL)|0x8000);
1062 else
1063 codec->codec_write(codec, AC97_POWER_CONTROL,
1064 codec->codec_read(codec, AC97_POWER_CONTROL)&~0x8000);
1065 return 0;
1066}
1067
1068static int generic_digital_control(struct ac97_codec *codec, int slots, int rate, int mode)
1069{
1070 u16 reg;
1071
1072 reg = codec->codec_read(codec, AC97_SPDIF_CONTROL);
1073
1074 switch(rate)
1075 {
1076 /* Off by default */
1077 default:
1078 case 0:
1079 reg = codec->codec_read(codec, AC97_EXTENDED_STATUS);
1080 codec->codec_write(codec, AC97_EXTENDED_STATUS, (reg & ~AC97_EA_SPDIF));
1081 if(rate == 0)
1082 return 0;
1083 return -EINVAL;
1084 case 1:
1085 reg = (reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_48K;
1086 break;
1087 case 2:
1088 reg = (reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_44K;
1089 break;
1090 case 3:
1091 reg = (reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_32K;
1092 break;
1093 }
1094
1095 reg &= ~AC97_SC_CC_MASK;
1096 reg |= (mode & AUDIO_CCMASK) << 6;
1097
1098 if(mode & AUDIO_DIGITAL)
1099 reg |= 2;
1100 if(mode & AUDIO_PRO)
1101 reg |= 1;
1102 if(mode & AUDIO_DRS)
1103 reg |= 0x4000;
1104
1105 codec->codec_write(codec, AC97_SPDIF_CONTROL, reg);
1106
1107 reg = codec->codec_read(codec, AC97_EXTENDED_STATUS);
1108 reg &= (AC97_EA_SLOT_MASK);
1109 reg |= AC97_EA_VRA | AC97_EA_SPDIF | slots;
1110 codec->codec_write(codec, AC97_EXTENDED_STATUS, reg);
1111
1112 reg = codec->codec_read(codec, AC97_EXTENDED_STATUS);
1113 if(!(reg & 0x0400))
1114 {
1115 codec->codec_write(codec, AC97_EXTENDED_STATUS, reg & ~ AC97_EA_SPDIF);
1116 return -EINVAL;
1117 }
1118 return 0;
1119}
1120
1121/*
1122 * Crystal digital audio control (CS4299)
1123 */
1124
1125static int crystal_digital_control(struct ac97_codec *codec, int slots, int rate, int mode)
1126{
1127 u16 cv;
1128
1129 if(mode & AUDIO_DIGITAL)
1130 return -EINVAL;
1131
1132 switch(rate)
1133 {
1134 case 0: cv = 0x0; break; /* SPEN off */
1135 case 48000: cv = 0x8004; break; /* 48KHz digital */
1136 case 44100: cv = 0x8104; break; /* 44.1KHz digital */
1137 case 32768: /* 32Khz */
1138 default:
1139 return -EINVAL;
1140 }
1141 codec->codec_write(codec, 0x68, cv);
1142 return 0;
1143}
1144
1145/*
1146 * CMedia digital audio control
1147 * Needs more work.
1148 */
1149
1150static int cmedia_digital_control(struct ac97_codec *codec, int slots, int rate, int mode)
1151{
1152 u16 cv;
1153
1154 if(mode & AUDIO_DIGITAL)
1155 return -EINVAL;
1156
1157 switch(rate)
1158 {
1159 case 0: cv = 0x0001; break; /* SPEN off */
1160 case 48000: cv = 0x0009; break; /* 48KHz digital */
1161 default:
1162 return -EINVAL;
1163 }
1164 codec->codec_write(codec, 0x2A, 0x05c4);
1165 codec->codec_write(codec, 0x6C, cv);
1166
1167 /* Switch on mix to surround */
1168 cv = codec->codec_read(codec, 0x64);
1169 cv &= ~0x0200;
1170 if(mode)
1171 cv |= 0x0200;
1172 codec->codec_write(codec, 0x64, cv);
1173 return 0;
1174}
1175
1176
1177/* copied from drivers/sound/maestro.c */
1178#if 0 /* there has been 1 person on the planet with a pt101 that we
1179 know of. If they care, they can put this back in :) */
1180static int pt101_init(struct ac97_codec * codec)
1181{
1182 printk(KERN_INFO "ac97_codec: PT101 Codec detected, initializing but _not_ installing mixer device.\n");
1183 /* who knows.. */
1184 codec->codec_write(codec, 0x2A, 0x0001);
1185 codec->codec_write(codec, 0x2C, 0x0000);
1186 codec->codec_write(codec, 0x2C, 0xFFFF);
1187 codec->codec_write(codec, 0x10, 0x9F1F);
1188 codec->codec_write(codec, 0x12, 0x0808);
1189 codec->codec_write(codec, 0x14, 0x9F1F);
1190 codec->codec_write(codec, 0x16, 0x9F1F);
1191 codec->codec_write(codec, 0x18, 0x0404);
1192 codec->codec_write(codec, 0x1A, 0x0000);
1193 codec->codec_write(codec, 0x1C, 0x0000);
1194 codec->codec_write(codec, 0x02, 0x0404);
1195 codec->codec_write(codec, 0x04, 0x0808);
1196 codec->codec_write(codec, 0x0C, 0x801F);
1197 codec->codec_write(codec, 0x0E, 0x801F);
1198 return 0;
1199}
1200#endif
1201
1202
1da177e4
LT		 1203EXPORT_SYMBOL(ac97_probe_codec);
1204
d6e4218e
AB		 1205MODULE_LICENSE("GPL");
1206
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