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[deliverable/linux.git] / sound / pci / ac97 / ac97_pcm.c
1 /*
2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3 * Universal interface for Audio Codec '97
4 *
5 * For more details look to AC '97 component specification revision 2.2
6 * by Intel Corporation (http://developer.intel.com) and to datasheets
7 * for specific codecs.
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26 #include <sound/driver.h>
27 #include <linux/delay.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/mutex.h>
31
32 #include <sound/core.h>
33 #include <sound/pcm.h>
34 #include <sound/control.h>
35 #include <sound/ac97_codec.h>
36 #include <sound/asoundef.h>
37 #include "ac97_patch.h"
38 #include "ac97_id.h"
39 #include "ac97_local.h"
40
41 /*
42 * PCM support
43 */
44
45 static unsigned char rate_reg_tables[2][4][9] = {
46 {
47 /* standard rates */
48 {
49 /* 3&4 front, 7&8 rear, 6&9 center/lfe */
50 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
51 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
52 0xff, /* slot 5 */
53 AC97_PCM_LFE_DAC_RATE, /* slot 6 */
54 AC97_PCM_SURR_DAC_RATE, /* slot 7 */
55 AC97_PCM_SURR_DAC_RATE, /* slot 8 */
56 AC97_PCM_LFE_DAC_RATE, /* slot 9 */
57 0xff, /* slot 10 */
58 0xff, /* slot 11 */
59 },
60 {
61 /* 7&8 front, 6&9 rear, 10&11 center/lfe */
62 0xff, /* slot 3 */
63 0xff, /* slot 4 */
64 0xff, /* slot 5 */
65 AC97_PCM_SURR_DAC_RATE, /* slot 6 */
66 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
67 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
68 AC97_PCM_SURR_DAC_RATE, /* slot 9 */
69 AC97_PCM_LFE_DAC_RATE, /* slot 10 */
70 AC97_PCM_LFE_DAC_RATE, /* slot 11 */
71 },
72 {
73 /* 6&9 front, 10&11 rear, 3&4 center/lfe */
74 AC97_PCM_LFE_DAC_RATE, /* slot 3 */
75 AC97_PCM_LFE_DAC_RATE, /* slot 4 */
76 0xff, /* slot 5 */
77 AC97_PCM_FRONT_DAC_RATE, /* slot 6 */
78 0xff, /* slot 7 */
79 0xff, /* slot 8 */
80 AC97_PCM_FRONT_DAC_RATE, /* slot 9 */
81 AC97_PCM_SURR_DAC_RATE, /* slot 10 */
82 AC97_PCM_SURR_DAC_RATE, /* slot 11 */
83 },
84 {
85 /* 10&11 front, 3&4 rear, 7&8 center/lfe */
86 AC97_PCM_SURR_DAC_RATE, /* slot 3 */
87 AC97_PCM_SURR_DAC_RATE, /* slot 4 */
88 0xff, /* slot 5 */
89 0xff, /* slot 6 */
90 AC97_PCM_LFE_DAC_RATE, /* slot 7 */
91 AC97_PCM_LFE_DAC_RATE, /* slot 8 */
92 0xff, /* slot 9 */
93 AC97_PCM_FRONT_DAC_RATE, /* slot 10 */
94 AC97_PCM_FRONT_DAC_RATE, /* slot 11 */
95 },
96 },
97 {
98 /* double rates */
99 {
100 /* 3&4 front, 7&8 front (t+1) */
101 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
102 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
103 0xff, /* slot 5 */
104 0xff, /* slot 6 */
105 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
106 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
107 0xff, /* slot 9 */
108 0xff, /* slot 10 */
109 0xff, /* slot 11 */
110 },
111 {
112 /* not specified in the specification */
113 0xff, /* slot 3 */
114 0xff, /* slot 4 */
115 0xff, /* slot 5 */
116 0xff, /* slot 6 */
117 0xff, /* slot 7 */
118 0xff, /* slot 8 */
119 0xff, /* slot 9 */
120 0xff, /* slot 10 */
121 0xff, /* slot 11 */
122 },
123 {
124 0xff, /* slot 3 */
125 0xff, /* slot 4 */
126 0xff, /* slot 5 */
127 0xff, /* slot 6 */
128 0xff, /* slot 7 */
129 0xff, /* slot 8 */
130 0xff, /* slot 9 */
131 0xff, /* slot 10 */
132 0xff, /* slot 11 */
133 },
134 {
135 0xff, /* slot 3 */
136 0xff, /* slot 4 */
137 0xff, /* slot 5 */
138 0xff, /* slot 6 */
139 0xff, /* slot 7 */
140 0xff, /* slot 8 */
141 0xff, /* slot 9 */
142 0xff, /* slot 10 */
143 0xff, /* slot 11 */
144 }
145 }};
146
147 /* FIXME: more various mappings for ADC? */
148 static unsigned char rate_cregs[9] = {
149 AC97_PCM_LR_ADC_RATE, /* 3 */
150 AC97_PCM_LR_ADC_RATE, /* 4 */
151 0xff, /* 5 */
152 AC97_PCM_MIC_ADC_RATE, /* 6 */
153 0xff, /* 7 */
154 0xff, /* 8 */
155 0xff, /* 9 */
156 0xff, /* 10 */
157 0xff, /* 11 */
158 };
159
160 static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx,
161 unsigned short slot, int dbl)
162 {
163 if (slot < 3)
164 return 0xff;
165 if (slot > 11)
166 return 0xff;
167 if (pcm->spdif)
168 return AC97_SPDIF; /* pseudo register */
169 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK)
170 return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3];
171 else
172 return rate_cregs[slot - 3];
173 }
174
175 static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate)
176 {
177 unsigned short old, bits, reg, mask;
178 unsigned int sbits;
179
180 if (! (ac97->ext_id & AC97_EI_SPDIF))
181 return -ENODEV;
182
183 /* TODO: double rate support */
184 if (ac97->flags & AC97_CS_SPDIF) {
185 switch (rate) {
186 case 48000: bits = 0; break;
187 case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; break;
188 default: /* invalid - disable output */
189 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
190 return -EINVAL;
191 }
192 reg = AC97_CSR_SPDIF;
193 mask = 1 << AC97_SC_SPSR_SHIFT;
194 } else {
195 if (ac97->id == AC97_ID_CM9739 && rate != 48000) {
196 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
197 return -EINVAL;
198 }
199 switch (rate) {
200 case 44100: bits = AC97_SC_SPSR_44K; break;
201 case 48000: bits = AC97_SC_SPSR_48K; break;
202 case 32000: bits = AC97_SC_SPSR_32K; break;
203 default: /* invalid - disable output */
204 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
205 return -EINVAL;
206 }
207 reg = AC97_SPDIF;
208 mask = AC97_SC_SPSR_MASK;
209 }
210
211 mutex_lock(&ac97->reg_mutex);
212 old = snd_ac97_read(ac97, reg) & mask;
213 if (old != bits) {
214 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
215 snd_ac97_update_bits_nolock(ac97, reg, mask, bits);
216 /* update the internal spdif bits */
217 sbits = ac97->spdif_status;
218 if (sbits & IEC958_AES0_PROFESSIONAL) {
219 sbits &= ~IEC958_AES0_PRO_FS;
220 switch (rate) {
221 case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break;
222 case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break;
223 case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break;
224 }
225 } else {
226 sbits &= ~(IEC958_AES3_CON_FS << 24);
227 switch (rate) {
228 case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break;
229 case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break;
230 case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break;
231 }
232 }
233 ac97->spdif_status = sbits;
234 }
235 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF);
236 mutex_unlock(&ac97->reg_mutex);
237 return 0;
238 }
239
240 /**
241 * snd_ac97_set_rate - change the rate of the given input/output.
242 * @ac97: the ac97 instance
243 * @reg: the register to change
244 * @rate: the sample rate to set
245 *
246 * Changes the rate of the given input/output on the codec.
247 * If the codec doesn't support VAR, the rate must be 48000 (except
248 * for SPDIF).
249 *
250 * The valid registers are AC97_PMC_MIC_ADC_RATE,
251 * AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE.
252 * AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted
253 * if the codec supports them.
254 * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF
255 * status bits.
256 *
257 * Returns zero if successful, or a negative error code on failure.
258 */
259 int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate)
260 {
261 int dbl;
262 unsigned int tmp;
263
264 dbl = rate > 48000;
265 if (dbl) {
266 if (!(ac97->flags & AC97_DOUBLE_RATE))
267 return -EINVAL;
268 if (reg != AC97_PCM_FRONT_DAC_RATE)
269 return -EINVAL;
270 }
271
272 switch (reg) {
273 case AC97_PCM_MIC_ADC_RATE:
274 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */
275 if (rate != 48000)
276 return -EINVAL;
277 break;
278 case AC97_PCM_FRONT_DAC_RATE:
279 case AC97_PCM_LR_ADC_RATE:
280 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */
281 if (rate != 48000 && rate != 96000)
282 return -EINVAL;
283 break;
284 case AC97_PCM_SURR_DAC_RATE:
285 if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC))
286 return -EINVAL;
287 break;
288 case AC97_PCM_LFE_DAC_RATE:
289 if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
290 return -EINVAL;
291 break;
292 case AC97_SPDIF:
293 /* special case */
294 return set_spdif_rate(ac97, rate);
295 default:
296 return -EINVAL;
297 }
298 if (dbl)
299 rate /= 2;
300 tmp = (rate * ac97->bus->clock) / 48000;
301 if (tmp > 65535)
302 return -EINVAL;
303 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE)
304 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,
305 AC97_EA_DRA, dbl ? AC97_EA_DRA : 0);
306 snd_ac97_update(ac97, reg, tmp & 0xffff);
307 snd_ac97_read(ac97, reg);
308 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) {
309 /* Intel controllers require double rate data to be put in
310 * slots 7+8
311 */
312 snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE,
313 AC97_GP_DRSS_MASK,
314 dbl ? AC97_GP_DRSS_78 : 0);
315 snd_ac97_read(ac97, AC97_GENERAL_PURPOSE);
316 }
317 return 0;
318 }
319
320 EXPORT_SYMBOL(snd_ac97_set_rate);
321
322 static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots)
323 {
324 if (!ac97_is_audio(ac97))
325 return 0;
326 if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) {
327 unsigned short slots = 0;
328 if (ac97_is_rev22(ac97)) {
329 /* Note: it's simply emulation of AMAP behaviour */
330 u16 es;
331 es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK;
332 switch (ac97->addr) {
333 case 1:
334 case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break;
335 case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break;
336 }
337 snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es);
338 }
339 switch (ac97->addr) {
340 case 0:
341 slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
342 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
343 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
344 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
345 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
346 if (ac97->ext_id & AC97_EI_SPDIF) {
347 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
348 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
349 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
350 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
351 else
352 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
353 }
354 *rate_table = 0;
355 break;
356 case 1:
357 case 2:
358 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
359 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
360 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
361 if (ac97->ext_id & AC97_EI_SPDIF) {
362 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
363 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
364 else
365 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
366 }
367 *rate_table = 1;
368 break;
369 case 3:
370 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
371 if (ac97->ext_id & AC97_EI_SPDIF)
372 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
373 *rate_table = 2;
374 break;
375 }
376 return slots;
377 } else {
378 unsigned short slots;
379 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
380 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
381 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
382 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
383 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
384 if (ac97->ext_id & AC97_EI_SPDIF) {
385 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
386 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
387 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
388 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
389 else
390 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
391 }
392 *rate_table = 0;
393 return slots;
394 }
395 }
396
397 static unsigned short get_cslots(struct snd_ac97 *ac97)
398 {
399 unsigned short slots;
400
401 if (!ac97_is_audio(ac97))
402 return 0;
403 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
404 slots |= (1<<AC97_SLOT_MIC);
405 return slots;
406 }
407
408 static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl)
409 {
410 int i, idx;
411 unsigned int rates = ~0;
412 unsigned char reg;
413
414 for (i = 3; i < 12; i++) {
415 if (!(slots & (1 << i)))
416 continue;
417 reg = get_slot_reg(pcm, cidx, i, dbl);
418 switch (reg) {
419 case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break;
420 case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break;
421 case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break;
422 case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break;
423 case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break;
424 default: idx = AC97_RATES_SPDIF; break;
425 }
426 rates &= pcm->r[dbl].codec[cidx]->rates[idx];
427 }
428 if (!dbl)
429 rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 |
430 SNDRV_PCM_RATE_96000);
431 return rates;
432 }
433
434 /**
435 * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams
436 * @bus: the ac97 bus instance
437 * @pcms_count: count of PCMs to be assigned
438 * @pcms: PCMs to be assigned
439 *
440 * It assigns available AC97 slots for given PCMs. If none or only
441 * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members
442 * are reduced and might be zero.
443 */
444 int snd_ac97_pcm_assign(struct snd_ac97_bus *bus,
445 unsigned short pcms_count,
446 const struct ac97_pcm *pcms)
447 {
448 int i, j, k;
449 const struct ac97_pcm *pcm;
450 struct ac97_pcm *rpcms, *rpcm;
451 unsigned short avail_slots[2][4];
452 unsigned char rate_table[2][4];
453 unsigned short tmp, slots;
454 unsigned short spdif_slots[4];
455 unsigned int rates;
456 struct snd_ac97 *codec;
457
458 rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL);
459 if (rpcms == NULL)
460 return -ENOMEM;
461 memset(avail_slots, 0, sizeof(avail_slots));
462 memset(rate_table, 0, sizeof(rate_table));
463 memset(spdif_slots, 0, sizeof(spdif_slots));
464 for (i = 0; i < 4; i++) {
465 codec = bus->codec[i];
466 if (!codec)
467 continue;
468 avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]);
469 avail_slots[1][i] = get_cslots(codec);
470 if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) {
471 for (j = 0; j < i; j++) {
472 if (bus->codec[j])
473 avail_slots[1][i] &= ~avail_slots[1][j];
474 }
475 }
476 }
477 /* first step - exclusive devices */
478 for (i = 0; i < pcms_count; i++) {
479 pcm = &pcms[i];
480 rpcm = &rpcms[i];
481 /* low-level driver thinks that it's more clever */
482 if (pcm->copy_flag) {
483 *rpcm = *pcm;
484 continue;
485 }
486 rpcm->stream = pcm->stream;
487 rpcm->exclusive = pcm->exclusive;
488 rpcm->spdif = pcm->spdif;
489 rpcm->private_value = pcm->private_value;
490 rpcm->bus = bus;
491 rpcm->rates = ~0;
492 slots = pcm->r[0].slots;
493 for (j = 0; j < 4 && slots; j++) {
494 if (!bus->codec[j])
495 continue;
496 rates = ~0;
497 if (pcm->spdif && pcm->stream == 0)
498 tmp = spdif_slots[j];
499 else
500 tmp = avail_slots[pcm->stream][j];
501 if (pcm->exclusive) {
502 /* exclusive access */
503 tmp &= slots;
504 for (k = 0; k < i; k++) {
505 if (rpcm->stream == rpcms[k].stream)
506 tmp &= ~rpcms[k].r[0].rslots[j];
507 }
508 } else {
509 /* non-exclusive access */
510 tmp &= pcm->r[0].slots;
511 }
512 if (tmp) {
513 rpcm->r[0].rslots[j] = tmp;
514 rpcm->r[0].codec[j] = bus->codec[j];
515 rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j];
516 if (bus->no_vra)
517 rates = SNDRV_PCM_RATE_48000;
518 else
519 rates = get_rates(rpcm, j, tmp, 0);
520 if (pcm->exclusive)
521 avail_slots[pcm->stream][j] &= ~tmp;
522 }
523 slots &= ~tmp;
524 rpcm->r[0].slots |= tmp;
525 rpcm->rates &= rates;
526 }
527 /* for double rate, we check the first codec only */
528 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK &&
529 bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) &&
530 rate_table[pcm->stream][0] == 0) {
531 tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) |
532 (1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0);
533 if ((tmp & pcm->r[1].slots) == tmp) {
534 rpcm->r[1].slots = tmp;
535 rpcm->r[1].rslots[0] = tmp;
536 rpcm->r[1].rate_table[0] = 0;
537 rpcm->r[1].codec[0] = bus->codec[0];
538 if (pcm->exclusive)
539 avail_slots[pcm->stream][0] &= ~tmp;
540 if (bus->no_vra)
541 rates = SNDRV_PCM_RATE_96000;
542 else
543 rates = get_rates(rpcm, 0, tmp, 1);
544 rpcm->rates |= rates;
545 }
546 }
547 if (rpcm->rates == ~0)
548 rpcm->rates = 0; /* not used */
549 }
550 bus->pcms_count = pcms_count;
551 bus->pcms = rpcms;
552 return 0;
553 }
554
555 EXPORT_SYMBOL(snd_ac97_pcm_assign);
556
557 /**
558 * snd_ac97_pcm_open - opens the given AC97 pcm
559 * @pcm: the ac97 pcm instance
560 * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz
561 * @cfg: output stream characteristics
562 * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm
563 *
564 * It locks the specified slots and sets the given rate to AC97 registers.
565 */
566 int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate,
567 enum ac97_pcm_cfg cfg, unsigned short slots)
568 {
569 struct snd_ac97_bus *bus;
570 int i, cidx, r, ok_flag;
571 unsigned int reg_ok[4] = {0,0,0,0};
572 unsigned char reg;
573 int err = 0;
574
575 r = rate > 48000;
576 bus = pcm->bus;
577 if (cfg == AC97_PCM_CFG_SPDIF) {
578 int err;
579 for (cidx = 0; cidx < 4; cidx++)
580 if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) {
581 err = set_spdif_rate(bus->codec[cidx], rate);
582 if (err < 0)
583 return err;
584 }
585 }
586 spin_lock_irq(&pcm->bus->bus_lock);
587 for (i = 3; i < 12; i++) {
588 if (!(slots & (1 << i)))
589 continue;
590 ok_flag = 0;
591 for (cidx = 0; cidx < 4; cidx++) {
592 if (bus->used_slots[pcm->stream][cidx] & (1 << i)) {
593 spin_unlock_irq(&pcm->bus->bus_lock);
594 err = -EBUSY;
595 goto error;
596 }
597 if (pcm->r[r].rslots[cidx] & (1 << i)) {
598 bus->used_slots[pcm->stream][cidx] |= (1 << i);
599 ok_flag++;
600 }
601 }
602 if (!ok_flag) {
603 spin_unlock_irq(&pcm->bus->bus_lock);
604 snd_printk(KERN_ERR "cannot find configuration for AC97 slot %i\n", i);
605 err = -EAGAIN;
606 goto error;
607 }
608 }
609 spin_unlock_irq(&pcm->bus->bus_lock);
610 for (i = 3; i < 12; i++) {
611 if (!(slots & (1 << i)))
612 continue;
613 for (cidx = 0; cidx < 4; cidx++) {
614 if (pcm->r[r].rslots[cidx] & (1 << i)) {
615 reg = get_slot_reg(pcm, cidx, i, r);
616 if (reg == 0xff) {
617 snd_printk(KERN_ERR "invalid AC97 slot %i?\n", i);
618 continue;
619 }
620 if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE)))
621 continue;
622 //printk(KERN_DEBUG "setting ac97 reg 0x%x to rate %d\n", reg, rate);
623 err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate);
624 if (err < 0)
625 snd_printk(KERN_ERR "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n", cidx, reg, rate, err);
626 else
627 reg_ok[cidx] |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE));
628 }
629 }
630 }
631 pcm->aslots = slots;
632 return 0;
633
634 error:
635 pcm->aslots = slots;
636 snd_ac97_pcm_close(pcm);
637 return err;
638 }
639
640 EXPORT_SYMBOL(snd_ac97_pcm_open);
641
642 /**
643 * snd_ac97_pcm_close - closes the given AC97 pcm
644 * @pcm: the ac97 pcm instance
645 *
646 * It frees the locked AC97 slots.
647 */
648 int snd_ac97_pcm_close(struct ac97_pcm *pcm)
649 {
650 struct snd_ac97_bus *bus;
651 unsigned short slots = pcm->aslots;
652 int i, cidx;
653
654 bus = pcm->bus;
655 spin_lock_irq(&pcm->bus->bus_lock);
656 for (i = 3; i < 12; i++) {
657 if (!(slots & (1 << i)))
658 continue;
659 for (cidx = 0; cidx < 4; cidx++)
660 bus->used_slots[pcm->stream][cidx] &= ~(1 << i);
661 }
662 pcm->aslots = 0;
663 spin_unlock_irq(&pcm->bus->bus_lock);
664 return 0;
665 }
666
667 EXPORT_SYMBOL(snd_ac97_pcm_close);
668
669 static int double_rate_hw_constraint_rate(struct snd_pcm_hw_params *params,
670 struct snd_pcm_hw_rule *rule)
671 {
672 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
673 if (channels->min > 2) {
674 static const struct snd_interval single_rates = {
675 .min = 1,
676 .max = 48000,
677 };
678 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
679 return snd_interval_refine(rate, &single_rates);
680 }
681 return 0;
682 }
683
684 static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params,
685 struct snd_pcm_hw_rule *rule)
686 {
687 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
688 if (rate->min > 48000) {
689 static const struct snd_interval double_rate_channels = {
690 .min = 2,
691 .max = 2,
692 };
693 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
694 return snd_interval_refine(channels, &double_rate_channels);
695 }
696 return 0;
697 }
698
699 /**
700 * snd_ac97_pcm_double_rate_rules - set double rate constraints
701 * @runtime: the runtime of the ac97 front playback pcm
702 *
703 * Installs the hardware constraint rules to prevent using double rates and
704 * more than two channels at the same time.
705 */
706 int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime)
707 {
708 int err;
709
710 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
711 double_rate_hw_constraint_rate, NULL,
712 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
713 if (err < 0)
714 return err;
715 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
716 double_rate_hw_constraint_channels, NULL,
717 SNDRV_PCM_HW_PARAM_RATE, -1);
718 return err;
719 }
720
721 EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules);
Linux kernel - Deliverables
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