?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
initial commit with v2.6.9
[linux-2.6.9-moxart.git] / sound / pci / ac97 / ac97_pcm.c
blob04f3b60969c48e63b3e028d12aea7f1914834df8
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 <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/control.h>
33 #include <sound/ac97_codec.h>
34 #include <sound/asoundef.h>
35 #include "ac97_patch.h"
36 #include "ac97_id.h"
37 #include "ac97_local.h"
38
39 /*
40 * PCM support
41 */
42
43 static unsigned char rate_reg_tables[2][4][9] = {
44 {
45 /* standard rates */
46 {
47 /* 3&4 front, 7&8 rear, 6&9 center/lfe */
48 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
49 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
50 0xff, /* slot 5 */
51 AC97_PCM_LFE_DAC_RATE, /* slot 6 */
52 AC97_PCM_SURR_DAC_RATE, /* slot 7 */
53 AC97_PCM_SURR_DAC_RATE, /* slot 8 */
54 AC97_PCM_LFE_DAC_RATE, /* slot 9 */
55 0xff, /* slot 10 */
56 0xff, /* slot 11 */
57 },
58 {
59 /* 7&8 front, 6&9 rear, 10&11 center/lfe */
60 0xff, /* slot 3 */
61 0xff, /* slot 4 */
62 0xff, /* slot 5 */
63 AC97_PCM_SURR_DAC_RATE, /* slot 6 */
64 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
65 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
66 AC97_PCM_SURR_DAC_RATE, /* slot 9 */
67 AC97_PCM_LFE_DAC_RATE, /* slot 10 */
68 AC97_PCM_LFE_DAC_RATE, /* slot 11 */
69 },
70 {
71 /* 6&9 front, 10&11 rear, 3&4 center/lfe */
72 AC97_PCM_LFE_DAC_RATE, /* slot 3 */
73 AC97_PCM_LFE_DAC_RATE, /* slot 4 */
74 0xff, /* slot 5 */
75 AC97_PCM_FRONT_DAC_RATE, /* slot 6 */
76 0xff, /* slot 7 */
77 0xff, /* slot 8 */
78 AC97_PCM_FRONT_DAC_RATE, /* slot 9 */
79 AC97_PCM_SURR_DAC_RATE, /* slot 10 */
80 AC97_PCM_SURR_DAC_RATE, /* slot 11 */
81 },
82 {
83 /* 10&11 front, 3&4 rear, 7&8 center/lfe */
84 AC97_PCM_SURR_DAC_RATE, /* slot 3 */
85 AC97_PCM_SURR_DAC_RATE, /* slot 4 */
86 0xff, /* slot 5 */
87 0xff, /* slot 6 */
88 AC97_PCM_LFE_DAC_RATE, /* slot 7 */
89 AC97_PCM_LFE_DAC_RATE, /* slot 8 */
90 0xff, /* slot 9 */
91 AC97_PCM_FRONT_DAC_RATE, /* slot 10 */
92 AC97_PCM_FRONT_DAC_RATE, /* slot 11 */
93 },
94 },
95 {
96 /* FIXME: double rates */
97 {
98 /* 3&4 front, 7&8 rear, 6&9 center/lfe */
99 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
100 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
101 0xff, /* slot 5 */
102 AC97_PCM_LFE_DAC_RATE, /* slot 6 */
103 AC97_PCM_SURR_DAC_RATE, /* slot 7 */
104 AC97_PCM_SURR_DAC_RATE, /* slot 8 */
105 AC97_PCM_LFE_DAC_RATE, /* slot 9 */
106 0xff, /* slot 10 */
107 0xff, /* slot 11 */
108 },
109 {
110 /* 7&8 front, 6&9 rear, 10&11 center/lfe */
111 0xff, /* slot 3 */
112 0xff, /* slot 4 */
113 0xff, /* slot 5 */
114 AC97_PCM_SURR_DAC_RATE, /* slot 6 */
115 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
116 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
117 AC97_PCM_SURR_DAC_RATE, /* slot 9 */
118 AC97_PCM_LFE_DAC_RATE, /* slot 10 */
119 AC97_PCM_LFE_DAC_RATE, /* slot 11 */
120 },
121 {
122 /* 6&9 front, 10&11 rear, 3&4 center/lfe */
123 AC97_PCM_LFE_DAC_RATE, /* slot 3 */
124 AC97_PCM_LFE_DAC_RATE, /* slot 4 */
125 0xff, /* slot 5 */
126 AC97_PCM_FRONT_DAC_RATE, /* slot 6 */
127 0xff, /* slot 7 */
128 0xff, /* slot 8 */
129 AC97_PCM_FRONT_DAC_RATE, /* slot 9 */
130 AC97_PCM_SURR_DAC_RATE, /* slot 10 */
131 AC97_PCM_SURR_DAC_RATE, /* slot 11 */
132 },
133 {
134 /* 10&11 front, 3&4 rear, 7&8 center/lfe */
135 AC97_PCM_SURR_DAC_RATE, /* slot 3 */
136 AC97_PCM_SURR_DAC_RATE, /* slot 4 */
137 0xff, /* slot 5 */
138 0xff, /* slot 6 */
139 AC97_PCM_LFE_DAC_RATE, /* slot 7 */
140 AC97_PCM_LFE_DAC_RATE, /* slot 8 */
141 0xff, /* slot 9 */
142 AC97_PCM_FRONT_DAC_RATE, /* slot 10 */
143 AC97_PCM_FRONT_DAC_RATE, /* 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(ac97_t *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 if (ac97->flags & AC97_CS_SPDIF) {
184 switch (rate) {
185 case 48000: bits = 0; break;
186 case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; 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_CSR_SPDIF;
192 mask = 1 << AC97_SC_SPSR_SHIFT;
193 } else {
194 if (ac97->id == AC97_ID_CM9739 && rate != 48000) {
195 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
196 return -EINVAL;
197 }
198 switch (rate) {
199 case 44100: bits = AC97_SC_SPSR_44K; break;
200 case 48000: bits = AC97_SC_SPSR_48K; break;
201 case 32000: bits = AC97_SC_SPSR_32K; break;
202 default: /* invalid - disable output */
203 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
204 return -EINVAL;
205 }
206 reg = AC97_SPDIF;
207 mask = AC97_SC_SPSR_MASK;
208 }
209
210 spin_lock(&ac97->reg_lock);
211 old = snd_ac97_read(ac97, reg) & mask;
212 spin_unlock(&ac97->reg_lock);
213 if (old != bits) {
214 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
215 snd_ac97_update_bits(ac97, reg, mask, bits);
216 /* update the internal spdif bits */
217 spin_lock(&ac97->reg_lock);
218 sbits = ac97->spdif_status;
219 if (sbits & IEC958_AES0_PROFESSIONAL) {
220 sbits &= ~IEC958_AES0_PRO_FS;
221 switch (rate) {
222 case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break;
223 case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break;
224 case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break;
225 }
226 } else {
227 sbits &= ~(IEC958_AES3_CON_FS << 24);
228 switch (rate) {
229 case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break;
230 case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break;
231 case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break;
232 }
233 }
234 ac97->spdif_status = sbits;
235 spin_unlock(&ac97->reg_lock);
236 }
237 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF);
238 return 0;
239 }
240
241 /**
242 * snd_ac97_set_rate - change the rate of the given input/output.
243 * @ac97: the ac97 instance
244 * @reg: the register to change
245 * @rate: the sample rate to set
246 *
247 * Changes the rate of the given input/output on the codec.
248 * If the codec doesn't support VAR, the rate must be 48000 (except
249 * for SPDIF).
250 *
251 * The valid registers are AC97_PMC_MIC_ADC_RATE,
252 * AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE.
253 * AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted
254 * if the codec supports them.
255 * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF
256 * status bits.
257 *
258 * Returns zero if successful, or a negative error code on failure.
259 */
260 int snd_ac97_set_rate(ac97_t *ac97, int reg, unsigned short rate)
261 {
262 unsigned int tmp;
263
264 switch (reg) {
265 case AC97_PCM_MIC_ADC_RATE:
266 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */
267 if (rate != 48000)
268 return -EINVAL;
269 break;
270 case AC97_PCM_FRONT_DAC_RATE:
271 case AC97_PCM_LR_ADC_RATE:
272 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */
273 if (rate != 48000)
274 return -EINVAL;
275 break;
276 case AC97_PCM_SURR_DAC_RATE:
277 if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC))
278 return -EINVAL;
279 break;
280 case AC97_PCM_LFE_DAC_RATE:
281 if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
282 return -EINVAL;
283 break;
284 case AC97_SPDIF:
285 /* special case */
286 return set_spdif_rate(ac97, rate);
287 default:
288 return -EINVAL;
289 }
290 tmp = ((unsigned int)rate * ac97->bus->clock) / 48000;
291 if (tmp > 65535)
292 return -EINVAL;
293 snd_ac97_update(ac97, reg, tmp & 0xffff);
294 snd_ac97_read(ac97, reg);
295 return 0;
296 }
297
298 static unsigned short get_pslots(ac97_t *ac97, unsigned char *rate_table, unsigned short *spdif_slots)
299 {
300 if (!ac97_is_audio(ac97))
301 return 0;
302 if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) {
303 unsigned short slots = 0;
304 if (ac97_is_rev22(ac97)) {
305 /* Note: it's simply emulation of AMAP behaviour */
306 u16 es;
307 es = ac97->regs[AC97_EXTENDED_STATUS] &= ~AC97_EI_DACS_SLOT_MASK;
308 switch (ac97->addr) {
309 case 1:
310 case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break;
311 case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break;
312 }
313 snd_ac97_write_cache(ac97, AC97_EXTENDED_STATUS, es);
314 }
315 switch (ac97->addr) {
316 case 0:
317 slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
318 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
319 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
320 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
321 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
322 if (ac97->ext_id & AC97_EI_SPDIF) {
323 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
324 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
325 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
326 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
327 else
328 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
329 }
330 *rate_table = 0;
331 break;
332 case 1:
333 case 2:
334 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
335 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
336 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
337 if (ac97->ext_id & AC97_EI_SPDIF) {
338 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
339 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
340 else
341 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
342 }
343 *rate_table = 1;
344 break;
345 case 3:
346 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
347 if (ac97->ext_id & AC97_EI_SPDIF)
348 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
349 *rate_table = 2;
350 break;
351 }
352 return slots;
353 } else {
354 unsigned short slots;
355 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
356 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
357 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
358 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
359 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
360 if (ac97->ext_id & AC97_EI_SPDIF) {
361 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
362 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
363 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
364 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
365 else
366 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
367 }
368 *rate_table = 0;
369 return slots;
370 }
371 }
372
373 static unsigned short get_cslots(ac97_t *ac97)
374 {
375 unsigned short slots;
376
377 if (!ac97_is_audio(ac97))
378 return 0;
379 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
380 slots |= (1<<AC97_SLOT_MIC);
381 return slots;
382 }
383
384 static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl)
385 {
386 int i, idx;
387 unsigned int rates = ~0;
388 unsigned char reg;
389
390 for (i = 3; i < 12; i++) {
391 if (!(slots & (1 << i)))
392 continue;
393 reg = get_slot_reg(pcm, cidx, i, dbl);
394 switch (reg) {
395 case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break;
396 case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break;
397 case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break;
398 case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break;
399 case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break;
400 default: idx = AC97_RATES_SPDIF; break;
401 }
402 rates &= pcm->r[dbl].codec[cidx]->rates[idx];
403 }
404 return rates;
405 }
406
407 /**
408 * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams
409 * @bus: the ac97 bus instance
410 * @pcms_count: count of PCMs to be assigned
411 * @pcms: PCMs to be assigned
412 *
413 * It assigns available AC97 slots for given PCMs. If none or only
414 * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members
415 * are reduced and might be zero.
416 */
417 int snd_ac97_pcm_assign(ac97_bus_t *bus,
418 unsigned short pcms_count,
419 const struct ac97_pcm *pcms)
420 {
421 int i, j, k;
422 const struct ac97_pcm *pcm;
423 struct ac97_pcm *rpcms, *rpcm;
424 unsigned short avail_slots[2][4];
425 unsigned char rate_table[2][4];
426 unsigned short tmp, slots;
427 unsigned short spdif_slots[4];
428 unsigned int rates;
429 ac97_t *codec;
430
431 rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL);
432 if (rpcms == NULL)
433 return -ENOMEM;
434 memset(avail_slots, 0, sizeof(avail_slots));
435 memset(rate_table, 0, sizeof(rate_table));
436 memset(spdif_slots, 0, sizeof(spdif_slots));
437 for (i = 0; i < 4; i++) {
438 codec = bus->codec[i];
439 if (!codec)
440 continue;
441 avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]);
442 avail_slots[1][i] = get_cslots(codec);
443 if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) {
444 for (j = 0; j < i; j++) {
445 if (bus->codec[j])
446 avail_slots[1][i] &= ~avail_slots[1][j];
447 }
448 }
449 }
450 /* FIXME: add double rate allocation */
451 /* first step - exclusive devices */
452 for (i = 0; i < pcms_count; i++) {
453 pcm = &pcms[i];
454 rpcm = &rpcms[i];
455 /* low-level driver thinks that it's more clever */
456 if (pcm->copy_flag) {
457 *rpcm = *pcm;
458 continue;
459 }
460 rpcm->stream = pcm->stream;
461 rpcm->exclusive = pcm->exclusive;
462 rpcm->spdif = pcm->spdif;
463 rpcm->private_value = pcm->private_value;
464 rpcm->bus = bus;
465 rpcm->rates = ~0;
466 slots = pcm->r[0].slots;
467 for (j = 0; j < 4 && slots; j++) {
468 if (!bus->codec[j])
469 continue;
470 rates = ~0;
471 if (pcm->spdif && pcm->stream == 0)
472 tmp = spdif_slots[j];
473 else
474 tmp = avail_slots[pcm->stream][j];
475 if (pcm->exclusive) {
476 /* exclusive access */
477 tmp &= slots;
478 for (k = 0; k < i; k++) {
479 if (rpcm->stream == rpcms[k].stream)
480 tmp &= ~rpcms[k].r[0].rslots[j];
481 }
482 } else {
483 /* non-exclusive access */
484 tmp &= pcm->r[0].slots;
485 }
486 if (tmp) {
487 rpcm->r[0].rslots[j] = tmp;
488 rpcm->r[0].codec[j] = bus->codec[j];
489 rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j];
490 if (bus->no_vra)
491 rates = SNDRV_PCM_RATE_48000;
492 else
493 rates = get_rates(rpcm, j, tmp, 0);
494 if (pcm->exclusive)
495 avail_slots[pcm->stream][j] &= ~tmp;
496 }
497 slots &= ~tmp;
498 rpcm->r[0].slots |= tmp;
499 rpcm->rates &= rates;
500 }
501 if (rpcm->rates == ~0)
502 rpcm->rates = 0; /* not used */
503 }
504 bus->pcms_count = pcms_count;
505 bus->pcms = rpcms;
506 return 0;
507 }
508
509 /**
510 * snd_ac97_pcm_open - opens the given AC97 pcm
511 * @pcm: the ac97 pcm instance
512 * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz
513 * @cfg: output stream characteristics
514 * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm
515 *
516 * It locks the specified slots and sets the given rate to AC97 registers.
517 */
518 int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate,
519 enum ac97_pcm_cfg cfg, unsigned short slots)
520 {
521 ac97_bus_t *bus;
522 int i, cidx, r = 0, ok_flag;
523 unsigned int reg_ok = 0;
524 unsigned char reg;
525 int err = 0;
526
527 if (rate > 48000) /* FIXME: add support for double rate */
528 return -EINVAL;
529 bus = pcm->bus;
530 if (cfg == AC97_PCM_CFG_SPDIF) {
531 int err;
532 for (cidx = 0; cidx < 4; cidx++)
533 if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) {
534 err = set_spdif_rate(bus->codec[cidx], rate);
535 if (err < 0)
536 return err;
537 }
538 }
539 spin_lock_irq(&pcm->bus->bus_lock);
540 for (i = 3; i < 12; i++) {
541 if (!(slots & (1 << i)))
542 continue;
543 ok_flag = 0;
544 for (cidx = 0; cidx < 4; cidx++) {
545 if (bus->used_slots[pcm->stream][cidx] & (1 << i)) {
546 spin_unlock_irq(&pcm->bus->bus_lock);
547 err = -EBUSY;
548 goto error;
549 }
550 if (pcm->r[r].rslots[cidx] & (1 << i)) {
551 bus->used_slots[pcm->stream][cidx] |= (1 << i);
552 ok_flag++;
553 }
554 }
555 if (!ok_flag) {
556 spin_unlock_irq(&pcm->bus->bus_lock);
557 snd_printk(KERN_ERR "cannot find configuration for AC97 slot %i\n", i);
558 err = -EAGAIN;
559 goto error;
560 }
561 }
562 spin_unlock_irq(&pcm->bus->bus_lock);
563 for (i = 3; i < 12; i++) {
564 if (!(slots & (1 << i)))
565 continue;
566 for (cidx = 0; cidx < 4; cidx++) {
567 if (pcm->r[r].rslots[cidx] & (1 << i)) {
568 reg = get_slot_reg(pcm, cidx, i, r);
569 if (reg == 0xff) {
570 snd_printk(KERN_ERR "invalid AC97 slot %i?\n", i);
571 continue;
572 }
573 if (reg_ok & (1 << (reg - AC97_PCM_FRONT_DAC_RATE)))
574 continue;
575 //printk(KERN_DEBUG "setting ac97 reg 0x%x to rate %d\n", reg, rate);
576 err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate);
577 if (err < 0)
578 snd_printk(KERN_ERR "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n", cidx, reg, rate, err);
579 else
580 reg_ok |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE));
581 }
582 }
583 }
584 pcm->aslots = slots;
585 return 0;
586
587 error:
588 pcm->aslots = slots;
589 snd_ac97_pcm_close(pcm);
590 return err;
591 }
592
593 /**
594 * snd_ac97_pcm_close - closes the given AC97 pcm
595 * @pcm: the ac97 pcm instance
596 *
597 * It frees the locked AC97 slots.
598 */
599 int snd_ac97_pcm_close(struct ac97_pcm *pcm)
600 {
601 ac97_bus_t *bus;
602 unsigned short slots = pcm->aslots;
603 int i, cidx;
604
605 bus = pcm->bus;
606 spin_lock_irq(&pcm->bus->bus_lock);
607 for (i = 3; i < 12; i++) {
608 if (!(slots & (1 << i)))
609 continue;
610 for (cidx = 0; cidx < 4; cidx++)
611 bus->used_slots[pcm->stream][cidx] &= ~(1 << i);
612 }
613 pcm->aslots = 0;
614 spin_unlock_irq(&pcm->bus->bus_lock);
615 return 0;
616 }
MOXA 2.6.9 from sdlinux-moxaart.tgz