1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 * Universal interface for Audio Codec '97
5 *
6 * For more details look to AC '97 component specification revision 2.2
7 * by Intel Corporation (http://developer.intel.com) and to datasheets
8 * for specific codecs.
9 */
10
11 #include <linux/delay.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/mutex.h>
15 #include <linux/export.h>
16
17 #include <sound/core.h>
18 #include <sound/pcm.h>
19 #include <sound/control.h>
20 #include <sound/ac97_codec.h>
21 #include <sound/asoundef.h>
22 #include "ac97_id.h"
23 #include "ac97_local.h"
24
25 /*
26 * PCM support
27 */
28
29 static const unsigned char rate_reg_tables[2][4][9] = {
30 {
31 /* standard rates */
32 {
33 /* 3&4 front, 7&8 rear, 6&9 center/lfe */
34 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
35 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
36 0xff, /* slot 5 */
37 AC97_PCM_LFE_DAC_RATE, /* slot 6 */
38 AC97_PCM_SURR_DAC_RATE, /* slot 7 */
39 AC97_PCM_SURR_DAC_RATE, /* slot 8 */
40 AC97_PCM_LFE_DAC_RATE, /* slot 9 */
41 0xff, /* slot 10 */
42 0xff, /* slot 11 */
43 },
44 {
45 /* 7&8 front, 6&9 rear, 10&11 center/lfe */
46 0xff, /* slot 3 */
47 0xff, /* slot 4 */
48 0xff, /* slot 5 */
49 AC97_PCM_SURR_DAC_RATE, /* slot 6 */
50 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
51 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
52 AC97_PCM_SURR_DAC_RATE, /* slot 9 */
53 AC97_PCM_LFE_DAC_RATE, /* slot 10 */
54 AC97_PCM_LFE_DAC_RATE, /* slot 11 */
55 },
56 {
57 /* 6&9 front, 10&11 rear, 3&4 center/lfe */
58 AC97_PCM_LFE_DAC_RATE, /* slot 3 */
59 AC97_PCM_LFE_DAC_RATE, /* slot 4 */
60 0xff, /* slot 5 */
61 AC97_PCM_FRONT_DAC_RATE, /* slot 6 */
62 0xff, /* slot 7 */
63 0xff, /* slot 8 */
64 AC97_PCM_FRONT_DAC_RATE, /* slot 9 */
65 AC97_PCM_SURR_DAC_RATE, /* slot 10 */
66 AC97_PCM_SURR_DAC_RATE, /* slot 11 */
67 },
68 {
69 /* 10&11 front, 3&4 rear, 7&8 center/lfe */
70 AC97_PCM_SURR_DAC_RATE, /* slot 3 */
71 AC97_PCM_SURR_DAC_RATE, /* slot 4 */
72 0xff, /* slot 5 */
73 0xff, /* slot 6 */
74 AC97_PCM_LFE_DAC_RATE, /* slot 7 */
75 AC97_PCM_LFE_DAC_RATE, /* slot 8 */
76 0xff, /* slot 9 */
77 AC97_PCM_FRONT_DAC_RATE, /* slot 10 */
78 AC97_PCM_FRONT_DAC_RATE, /* slot 11 */
79 },
80 },
81 {
82 /* double rates */
83 {
84 /* 3&4 front, 7&8 front (t+1) */
85 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
86 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
87 0xff, /* slot 5 */
88 0xff, /* slot 6 */
89 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
90 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
91 0xff, /* slot 9 */
92 0xff, /* slot 10 */
93 0xff, /* slot 11 */
94 },
95 {
96 /* not specified in the specification */
97 0xff, /* slot 3 */
98 0xff, /* slot 4 */
99 0xff, /* slot 5 */
100 0xff, /* slot 6 */
101 0xff, /* slot 7 */
102 0xff, /* slot 8 */
103 0xff, /* slot 9 */
104 0xff, /* slot 10 */
105 0xff, /* slot 11 */
106 },
107 {
108 0xff, /* slot 3 */
109 0xff, /* slot 4 */
110 0xff, /* slot 5 */
111 0xff, /* slot 6 */
112 0xff, /* slot 7 */
113 0xff, /* slot 8 */
114 0xff, /* slot 9 */
115 0xff, /* slot 10 */
116 0xff, /* slot 11 */
117 },
118 {
119 0xff, /* slot 3 */
120 0xff, /* slot 4 */
121 0xff, /* slot 5 */
122 0xff, /* slot 6 */
123 0xff, /* slot 7 */
124 0xff, /* slot 8 */
125 0xff, /* slot 9 */
126 0xff, /* slot 10 */
127 0xff, /* slot 11 */
128 }
129 }};
130
131 /* FIXME: more various mappings for ADC? */
132 static const unsigned char rate_cregs[9] = {
133 AC97_PCM_LR_ADC_RATE, /* 3 */
134 AC97_PCM_LR_ADC_RATE, /* 4 */
135 0xff, /* 5 */
136 AC97_PCM_MIC_ADC_RATE, /* 6 */
137 0xff, /* 7 */
138 0xff, /* 8 */
139 0xff, /* 9 */
140 0xff, /* 10 */
141 0xff, /* 11 */
142 };
143
get_slot_reg(struct ac97_pcm * pcm,unsigned short cidx,unsigned short slot,int dbl)144 static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx,
145 unsigned short slot, int dbl)
146 {
147 if (slot < 3)
148 return 0xff;
149 if (slot > 11)
150 return 0xff;
151 if (pcm->spdif)
152 return AC97_SPDIF; /* pseudo register */
153 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK)
154 return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3];
155 else
156 return rate_cregs[slot - 3];
157 }
158
set_spdif_rate(struct snd_ac97 * ac97,unsigned short rate)159 static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate)
160 {
161 unsigned short old, bits, reg, mask;
162 unsigned int sbits;
163
164 if (! (ac97->ext_id & AC97_EI_SPDIF))
165 return -ENODEV;
166
167 /* TODO: double rate support */
168 if (ac97->flags & AC97_CS_SPDIF) {
169 switch (rate) {
170 case 48000: bits = 0; break;
171 case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; break;
172 default: /* invalid - disable output */
173 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
174 return -EINVAL;
175 }
176 reg = AC97_CSR_SPDIF;
177 mask = 1 << AC97_SC_SPSR_SHIFT;
178 } else {
179 if (ac97->id == AC97_ID_CM9739 && rate != 48000) {
180 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
181 return -EINVAL;
182 }
183 switch (rate) {
184 case 44100: bits = AC97_SC_SPSR_44K; break;
185 case 48000: bits = AC97_SC_SPSR_48K; break;
186 case 32000: bits = AC97_SC_SPSR_32K; break;
187 default: /* invalid - disable output */
188 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
189 return -EINVAL;
190 }
191 reg = AC97_SPDIF;
192 mask = AC97_SC_SPSR_MASK;
193 }
194
195 guard(mutex)(&ac97->reg_mutex);
196 old = snd_ac97_read(ac97, reg) & mask;
197 if (old != bits) {
198 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
199 snd_ac97_update_bits_nolock(ac97, reg, mask, bits);
200 /* update the internal spdif bits */
201 sbits = ac97->spdif_status;
202 if (sbits & IEC958_AES0_PROFESSIONAL) {
203 sbits &= ~IEC958_AES0_PRO_FS;
204 switch (rate) {
205 case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break;
206 case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break;
207 case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break;
208 }
209 } else {
210 sbits &= ~(IEC958_AES3_CON_FS << 24);
211 switch (rate) {
212 case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break;
213 case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break;
214 case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break;
215 }
216 }
217 ac97->spdif_status = sbits;
218 }
219 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF);
220 return 0;
221 }
222
223 /**
224 * snd_ac97_set_rate - change the rate of the given input/output.
225 * @ac97: the ac97 instance
226 * @reg: the register to change
227 * @rate: the sample rate to set
228 *
229 * Changes the rate of the given input/output on the codec.
230 * If the codec doesn't support VAR, the rate must be 48000 (except
231 * for SPDIF).
232 *
233 * The valid registers are AC97_PCM_MIC_ADC_RATE,
234 * AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE.
235 * AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted
236 * if the codec supports them.
237 * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF
238 * status bits.
239 *
240 * Return: Zero if successful, or a negative error code on failure.
241 */
snd_ac97_set_rate(struct snd_ac97 * ac97,int reg,unsigned int rate)242 int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate)
243 {
244 int dbl;
245 unsigned int tmp;
246
247 dbl = rate > 48000;
248 if (dbl) {
249 if (!(ac97->flags & AC97_DOUBLE_RATE))
250 return -EINVAL;
251 if (reg != AC97_PCM_FRONT_DAC_RATE)
252 return -EINVAL;
253 }
254
255 snd_ac97_update_power(ac97, reg, 1);
256 switch (reg) {
257 case AC97_PCM_MIC_ADC_RATE:
258 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */
259 if (rate != 48000)
260 return -EINVAL;
261 break;
262 case AC97_PCM_FRONT_DAC_RATE:
263 case AC97_PCM_LR_ADC_RATE:
264 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */
265 if (rate != 48000 && rate != 96000)
266 return -EINVAL;
267 break;
268 case AC97_PCM_SURR_DAC_RATE:
269 if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC))
270 return -EINVAL;
271 break;
272 case AC97_PCM_LFE_DAC_RATE:
273 if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
274 return -EINVAL;
275 break;
276 case AC97_SPDIF:
277 /* special case */
278 return set_spdif_rate(ac97, rate);
279 default:
280 return -EINVAL;
281 }
282 if (dbl)
283 rate /= 2;
284 tmp = (rate * ac97->bus->clock) / 48000;
285 if (tmp > 65535)
286 return -EINVAL;
287 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE)
288 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,
289 AC97_EA_DRA, dbl ? AC97_EA_DRA : 0);
290 snd_ac97_update(ac97, reg, tmp & 0xffff);
291 snd_ac97_read(ac97, reg);
292 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) {
293 /* Intel controllers require double rate data to be put in
294 * slots 7+8
295 */
296 snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE,
297 AC97_GP_DRSS_MASK,
298 dbl ? AC97_GP_DRSS_78 : 0);
299 snd_ac97_read(ac97, AC97_GENERAL_PURPOSE);
300 }
301 return 0;
302 }
303
304 EXPORT_SYMBOL(snd_ac97_set_rate);
305
get_pslots(struct snd_ac97 * ac97,unsigned char * rate_table,unsigned short * spdif_slots)306 static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots)
307 {
308 if (!ac97_is_audio(ac97))
309 return 0;
310 if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) {
311 unsigned short slots = 0;
312 if (ac97_is_rev22(ac97)) {
313 /* Note: it's simply emulation of AMAP behaviour */
314 u16 es;
315 es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK;
316 switch (ac97->addr) {
317 case 1:
318 case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break;
319 case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break;
320 }
321 snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es);
322 }
323 switch (ac97->addr) {
324 case 0:
325 slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
326 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
327 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
328 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
329 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
330 if (ac97->ext_id & AC97_EI_SPDIF) {
331 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
332 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
333 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
334 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
335 else
336 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
337 }
338 *rate_table = 0;
339 break;
340 case 1:
341 case 2:
342 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
343 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
344 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
345 if (ac97->ext_id & AC97_EI_SPDIF) {
346 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
347 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
348 else
349 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
350 }
351 *rate_table = 1;
352 break;
353 case 3:
354 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
355 if (ac97->ext_id & AC97_EI_SPDIF)
356 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
357 *rate_table = 2;
358 break;
359 }
360 return slots;
361 } else {
362 unsigned short slots;
363 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
364 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
365 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
366 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
367 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
368 if (ac97->ext_id & AC97_EI_SPDIF) {
369 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
370 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
371 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
372 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
373 else
374 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
375 }
376 *rate_table = 0;
377 return slots;
378 }
379 }
380
get_cslots(struct snd_ac97 * ac97)381 static unsigned short get_cslots(struct snd_ac97 *ac97)
382 {
383 unsigned short slots;
384
385 if (!ac97_is_audio(ac97))
386 return 0;
387 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
388 slots |= (1<<AC97_SLOT_MIC);
389 return slots;
390 }
391
get_rates(struct ac97_pcm * pcm,unsigned int cidx,unsigned short slots,int dbl)392 static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl)
393 {
394 int i, idx;
395 unsigned int rates = ~0;
396 unsigned char reg;
397
398 for (i = 3; i < 12; i++) {
399 if (!(slots & (1 << i)))
400 continue;
401 reg = get_slot_reg(pcm, cidx, i, dbl);
402 switch (reg) {
403 case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break;
404 case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break;
405 case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break;
406 case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break;
407 case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break;
408 default: idx = AC97_RATES_SPDIF; break;
409 }
410 rates &= pcm->r[dbl].codec[cidx]->rates[idx];
411 }
412 if (!dbl)
413 rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 |
414 SNDRV_PCM_RATE_96000);
415 return rates;
416 }
417
418 /**
419 * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams
420 * @bus: the ac97 bus instance
421 * @pcms_count: count of PCMs to be assigned
422 * @pcms: PCMs to be assigned
423 *
424 * It assigns available AC97 slots for given PCMs. If none or only
425 * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members
426 * are reduced and might be zero.
427 *
428 * Return: Zero if successful, or a negative error code on failure.
429 */
snd_ac97_pcm_assign(struct snd_ac97_bus * bus,unsigned short pcms_count,const struct ac97_pcm * pcms)430 int snd_ac97_pcm_assign(struct snd_ac97_bus *bus,
431 unsigned short pcms_count,
432 const struct ac97_pcm *pcms)
433 {
434 int i, j, k;
435 const struct ac97_pcm *pcm;
436 struct ac97_pcm *rpcms, *rpcm;
437 unsigned short avail_slots[2][4];
438 unsigned char rate_table[2][4];
439 unsigned short tmp, slots;
440 unsigned short spdif_slots[4];
441 unsigned int rates;
442 struct snd_ac97 *codec;
443
444 rpcms = kzalloc_objs(struct ac97_pcm, pcms_count);
445 if (rpcms == NULL)
446 return -ENOMEM;
447 memset(avail_slots, 0, sizeof(avail_slots));
448 memset(rate_table, 0, sizeof(rate_table));
449 memset(spdif_slots, 0, sizeof(spdif_slots));
450 for (i = 0; i < 4; i++) {
451 codec = bus->codec[i];
452 if (!codec)
453 continue;
454 avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]);
455 avail_slots[1][i] = get_cslots(codec);
456 if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) {
457 for (j = 0; j < i; j++) {
458 if (bus->codec[j])
459 avail_slots[1][i] &= ~avail_slots[1][j];
460 }
461 }
462 }
463 /* first step - exclusive devices */
464 for (i = 0; i < pcms_count; i++) {
465 pcm = &pcms[i];
466 rpcm = &rpcms[i];
467 /* low-level driver thinks that it's more clever */
468 if (pcm->copy_flag) {
469 *rpcm = *pcm;
470 continue;
471 }
472 rpcm->stream = pcm->stream;
473 rpcm->exclusive = pcm->exclusive;
474 rpcm->spdif = pcm->spdif;
475 rpcm->private_value = pcm->private_value;
476 rpcm->bus = bus;
477 rpcm->rates = ~0;
478 slots = pcm->r[0].slots;
479 for (j = 0; j < 4 && slots; j++) {
480 if (!bus->codec[j])
481 continue;
482 rates = ~0;
483 if (pcm->spdif && pcm->stream == 0)
484 tmp = spdif_slots[j];
485 else
486 tmp = avail_slots[pcm->stream][j];
487 if (pcm->exclusive) {
488 /* exclusive access */
489 tmp &= slots;
490 for (k = 0; k < i; k++) {
491 if (rpcm->stream == rpcms[k].stream)
492 tmp &= ~rpcms[k].r[0].rslots[j];
493 }
494 } else {
495 /* non-exclusive access */
496 tmp &= pcm->r[0].slots;
497 }
498 if (tmp) {
499 rpcm->r[0].rslots[j] = tmp;
500 rpcm->r[0].codec[j] = bus->codec[j];
501 rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j];
502 if (bus->no_vra)
503 rates = SNDRV_PCM_RATE_48000;
504 else
505 rates = get_rates(rpcm, j, tmp, 0);
506 if (pcm->exclusive)
507 avail_slots[pcm->stream][j] &= ~tmp;
508 }
509 slots &= ~tmp;
510 rpcm->r[0].slots |= tmp;
511 rpcm->rates &= rates;
512 }
513 /* for double rate, we check the first codec only */
514 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK &&
515 bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) &&
516 rate_table[pcm->stream][0] == 0) {
517 tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) |
518 (1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0);
519 if ((tmp & pcm->r[1].slots) == tmp) {
520 rpcm->r[1].slots = tmp;
521 rpcm->r[1].rslots[0] = tmp;
522 rpcm->r[1].rate_table[0] = 0;
523 rpcm->r[1].codec[0] = bus->codec[0];
524 if (pcm->exclusive)
525 avail_slots[pcm->stream][0] &= ~tmp;
526 if (bus->no_vra)
527 rates = SNDRV_PCM_RATE_96000;
528 else
529 rates = get_rates(rpcm, 0, tmp, 1);
530 rpcm->rates |= rates;
531 }
532 }
533 if (rpcm->rates == ~0)
534 rpcm->rates = 0; /* not used */
535 }
536 bus->pcms_count = pcms_count;
537 bus->pcms = rpcms;
538 return 0;
539 }
540
541 EXPORT_SYMBOL(snd_ac97_pcm_assign);
542
543 /**
544 * snd_ac97_pcm_open - opens the given AC97 pcm
545 * @pcm: the ac97 pcm instance
546 * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz
547 * @cfg: output stream characteristics
548 * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm
549 *
550 * It locks the specified slots and sets the given rate to AC97 registers.
551 *
552 * Return: Zero if successful, or a negative error code on failure.
553 */
snd_ac97_pcm_open(struct ac97_pcm * pcm,unsigned int rate,enum ac97_pcm_cfg cfg,unsigned short slots)554 int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate,
555 enum ac97_pcm_cfg cfg, unsigned short slots)
556 {
557 struct snd_ac97_bus *bus;
558 int i, cidx, r, ok_flag;
559 unsigned int reg_ok[4] = {0,0,0,0};
560 unsigned char reg;
561 int err = 0;
562
563 r = rate > 48000;
564 bus = pcm->bus;
565 if (cfg == AC97_PCM_CFG_SPDIF) {
566 for (cidx = 0; cidx < 4; cidx++)
567 if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) {
568 err = set_spdif_rate(bus->codec[cidx], rate);
569 if (err < 0)
570 return err;
571 }
572 }
573 scoped_guard(spinlock_irq, &pcm->bus->bus_lock) {
574 for (i = 3; i < 12; i++) {
575 if (!(slots & (1 << i)))
576 continue;
577 ok_flag = 0;
578 for (cidx = 0; cidx < 4; cidx++) {
579 if (bus->used_slots[pcm->stream][cidx] & (1 << i)) {
580 err = -EBUSY;
581 goto error;
582 }
583 if (pcm->r[r].rslots[cidx] & (1 << i)) {
584 bus->used_slots[pcm->stream][cidx] |= (1 << i);
585 ok_flag++;
586 }
587 }
588 if (!ok_flag) {
589 dev_err(bus->card->dev,
590 "cannot find configuration for AC97 slot %i\n",
591 i);
592 err = -EAGAIN;
593 goto error;
594 }
595 }
596 pcm->cur_dbl = r;
597 }
598 for (i = 3; i < 12; i++) {
599 if (!(slots & (1 << i)))
600 continue;
601 for (cidx = 0; cidx < 4; cidx++) {
602 if (pcm->r[r].rslots[cidx] & (1 << i)) {
603 reg = get_slot_reg(pcm, cidx, i, r);
604 if (reg == 0xff) {
605 dev_err(bus->card->dev,
606 "invalid AC97 slot %i?\n", i);
607 continue;
608 }
609 if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE)))
610 continue;
611 dev_dbg(bus->card->dev,
612 "setting ac97 reg 0x%x to rate %d\n",
613 reg, rate);
614 err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate);
615 if (err < 0)
616 dev_err(bus->card->dev,
617 "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n",
618 cidx, reg, rate, err);
619 else
620 reg_ok[cidx] |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE));
621 }
622 }
623 }
624 pcm->aslots = slots;
625 return 0;
626
627 error:
628 pcm->aslots = slots;
629 snd_ac97_pcm_close(pcm);
630 return err;
631 }
632
633 EXPORT_SYMBOL(snd_ac97_pcm_open);
634
635 /**
636 * snd_ac97_pcm_close - closes the given AC97 pcm
637 * @pcm: the ac97 pcm instance
638 *
639 * It frees the locked AC97 slots.
640 *
641 * Return: Zero.
642 */
snd_ac97_pcm_close(struct ac97_pcm * pcm)643 int snd_ac97_pcm_close(struct ac97_pcm *pcm)
644 {
645 struct snd_ac97_bus *bus;
646 unsigned short slots = pcm->aslots;
647 int i, cidx;
648
649 #ifdef CONFIG_SND_AC97_POWER_SAVE
650 int r = pcm->cur_dbl;
651 for (i = 3; i < 12; i++) {
652 if (!(slots & (1 << i)))
653 continue;
654 for (cidx = 0; cidx < 4; cidx++) {
655 if (pcm->r[r].rslots[cidx] & (1 << i)) {
656 int reg = get_slot_reg(pcm, cidx, i, r);
657 snd_ac97_update_power(pcm->r[r].codec[cidx],
658 reg, 0);
659 }
660 }
661 }
662 #endif
663
664 bus = pcm->bus;
665 guard(spinlock_irq)(&pcm->bus->bus_lock);
666 for (i = 3; i < 12; i++) {
667 if (!(slots & (1 << i)))
668 continue;
669 for (cidx = 0; cidx < 4; cidx++)
670 bus->used_slots[pcm->stream][cidx] &= ~(1 << i);
671 }
672 pcm->aslots = 0;
673 pcm->cur_dbl = 0;
674 return 0;
675 }
676
677 EXPORT_SYMBOL(snd_ac97_pcm_close);
678
double_rate_hw_constraint_rate(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)679 static int double_rate_hw_constraint_rate(struct snd_pcm_hw_params *params,
680 struct snd_pcm_hw_rule *rule)
681 {
682 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
683 if (channels->min > 2) {
684 static const struct snd_interval single_rates = {
685 .min = 1,
686 .max = 48000,
687 };
688 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
689 return snd_interval_refine(rate, &single_rates);
690 }
691 return 0;
692 }
693
double_rate_hw_constraint_channels(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)694 static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params,
695 struct snd_pcm_hw_rule *rule)
696 {
697 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
698 if (rate->min > 48000) {
699 static const struct snd_interval double_rate_channels = {
700 .min = 2,
701 .max = 2,
702 };
703 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
704 return snd_interval_refine(channels, &double_rate_channels);
705 }
706 return 0;
707 }
708
709 /**
710 * snd_ac97_pcm_double_rate_rules - set double rate constraints
711 * @runtime: the runtime of the ac97 front playback pcm
712 *
713 * Installs the hardware constraint rules to prevent using double rates and
714 * more than two channels at the same time.
715 *
716 * Return: Zero if successful, or a negative error code on failure.
717 */
snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime * runtime)718 int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime)
719 {
720 int err;
721
722 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
723 double_rate_hw_constraint_rate, NULL,
724 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
725 if (err < 0)
726 return err;
727 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
728 double_rate_hw_constraint_channels, NULL,
729 SNDRV_PCM_HW_PARAM_RATE, -1);
730 return err;
731 }
732
733 EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules);
734